1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD$"); 35 36#include <netinet/sctp_os.h> 37#include <sys/proc.h> 38#include <netinet/sctp_var.h> 39#include <netinet/sctp_sysctl.h> 40#include <netinet/sctp_header.h> 41#include <netinet/sctp_pcb.h> 42#include <netinet/sctputil.h> 43#include <netinet/sctp_output.h> 44#include <netinet/sctp_uio.h> 45#include <netinet/sctputil.h> 46#include <netinet/sctp_auth.h> 47#include <netinet/sctp_timer.h> 48#include <netinet/sctp_asconf.h> 49#include <netinet/sctp_indata.h> 50#include <netinet/sctp_bsd_addr.h> 51#include <netinet/sctp_input.h> 52#include <netinet/sctp_crc32.h> 53#if defined(INET) || defined(INET6) 54#include <netinet/udp.h> 55#endif 56#include <netinet/udp_var.h> 57#include <machine/in_cksum.h> 58 59 60 61#define SCTP_MAX_GAPS_INARRAY 4 62struct sack_track { 63 uint8_t right_edge; /* mergable on the right edge */ 64 uint8_t left_edge; /* mergable on the left edge */ 65 uint8_t num_entries; 66 uint8_t spare; 67 struct sctp_gap_ack_block gaps[SCTP_MAX_GAPS_INARRAY]; 68}; 69 70struct sack_track sack_array[256] = { 71 {0, 0, 0, 0, /* 0x00 */ 72 {{0, 0}, 73 {0, 0}, 74 {0, 0}, 75 {0, 0} 76 } 77 }, 78 {1, 0, 1, 0, /* 0x01 */ 79 {{0, 0}, 80 {0, 0}, 81 {0, 0}, 82 {0, 0} 83 } 84 }, 85 {0, 0, 1, 0, /* 0x02 */ 86 {{1, 1}, 87 {0, 0}, 88 {0, 0}, 89 {0, 0} 90 } 91 }, 92 {1, 0, 1, 0, /* 0x03 */ 93 {{0, 1}, 94 {0, 0}, 95 {0, 0}, 96 {0, 0} 97 } 98 }, 99 {0, 0, 1, 0, /* 0x04 */ 100 {{2, 2}, 101 {0, 0}, 102 {0, 0}, 103 {0, 0} 104 } 105 }, 106 {1, 0, 2, 0, /* 0x05 */ 107 {{0, 0}, 108 {2, 2}, 109 {0, 0}, 110 {0, 0} 111 } 112 }, 113 {0, 0, 1, 0, /* 0x06 */ 114 {{1, 2}, 115 {0, 0}, 116 {0, 0}, 117 {0, 0} 118 } 119 }, 120 {1, 0, 1, 0, /* 0x07 */ 121 {{0, 2}, 122 {0, 0}, 123 {0, 0}, 124 {0, 0} 125 } 126 }, 127 {0, 0, 1, 0, /* 0x08 */ 128 {{3, 3}, 129 {0, 0}, 130 {0, 0}, 131 {0, 0} 132 } 133 }, 134 {1, 0, 2, 0, /* 0x09 */ 135 {{0, 0}, 136 {3, 3}, 137 {0, 0}, 138 {0, 0} 139 } 140 }, 141 {0, 0, 2, 0, /* 0x0a */ 142 {{1, 1}, 143 {3, 3}, 144 {0, 0}, 145 {0, 0} 146 } 147 }, 148 {1, 0, 2, 0, /* 0x0b */ 149 {{0, 1}, 150 {3, 3}, 151 {0, 0}, 152 {0, 0} 153 } 154 }, 155 {0, 0, 1, 0, /* 0x0c */ 156 {{2, 3}, 157 {0, 0}, 158 {0, 0}, 159 {0, 0} 160 } 161 }, 162 {1, 0, 2, 0, /* 0x0d */ 163 {{0, 0}, 164 {2, 3}, 165 {0, 0}, 166 {0, 0} 167 } 168 }, 169 {0, 0, 1, 0, /* 0x0e */ 170 {{1, 3}, 171 {0, 0}, 172 {0, 0}, 173 {0, 0} 174 } 175 }, 176 {1, 0, 1, 0, /* 0x0f */ 177 {{0, 3}, 178 {0, 0}, 179 {0, 0}, 180 {0, 0} 181 } 182 }, 183 {0, 0, 1, 0, /* 0x10 */ 184 {{4, 4}, 185 {0, 0}, 186 {0, 0}, 187 {0, 0} 188 } 189 }, 190 {1, 0, 2, 0, /* 0x11 */ 191 {{0, 0}, 192 {4, 4}, 193 {0, 0}, 194 {0, 0} 195 } 196 }, 197 {0, 0, 2, 0, /* 0x12 */ 198 {{1, 1}, 199 {4, 4}, 200 {0, 0}, 201 {0, 0} 202 } 203 }, 204 {1, 0, 2, 0, /* 0x13 */ 205 {{0, 1}, 206 {4, 4}, 207 {0, 0}, 208 {0, 0} 209 } 210 }, 211 {0, 0, 2, 0, /* 0x14 */ 212 {{2, 2}, 213 {4, 4}, 214 {0, 0}, 215 {0, 0} 216 } 217 }, 218 {1, 0, 3, 0, /* 0x15 */ 219 {{0, 0}, 220 {2, 2}, 221 {4, 4}, 222 {0, 0} 223 } 224 }, 225 {0, 0, 2, 0, /* 0x16 */ 226 {{1, 2}, 227 {4, 4}, 228 {0, 0}, 229 {0, 0} 230 } 231 }, 232 {1, 0, 2, 0, /* 0x17 */ 233 {{0, 2}, 234 {4, 4}, 235 {0, 0}, 236 {0, 0} 237 } 238 }, 239 {0, 0, 1, 0, /* 0x18 */ 240 {{3, 4}, 241 {0, 0}, 242 {0, 0}, 243 {0, 0} 244 } 245 }, 246 {1, 0, 2, 0, /* 0x19 */ 247 {{0, 0}, 248 {3, 4}, 249 {0, 0}, 250 {0, 0} 251 } 252 }, 253 {0, 0, 2, 0, /* 0x1a */ 254 {{1, 1}, 255 {3, 4}, 256 {0, 0}, 257 {0, 0} 258 } 259 }, 260 {1, 0, 2, 0, /* 0x1b */ 261 {{0, 1}, 262 {3, 4}, 263 {0, 0}, 264 {0, 0} 265 } 266 }, 267 {0, 0, 1, 0, /* 0x1c */ 268 {{2, 4}, 269 {0, 0}, 270 {0, 0}, 271 {0, 0} 272 } 273 }, 274 {1, 0, 2, 0, /* 0x1d */ 275 {{0, 0}, 276 {2, 4}, 277 {0, 0}, 278 {0, 0} 279 } 280 }, 281 {0, 0, 1, 0, /* 0x1e */ 282 {{1, 4}, 283 {0, 0}, 284 {0, 0}, 285 {0, 0} 286 } 287 }, 288 {1, 0, 1, 0, /* 0x1f */ 289 {{0, 4}, 290 {0, 0}, 291 {0, 0}, 292 {0, 0} 293 } 294 }, 295 {0, 0, 1, 0, /* 0x20 */ 296 {{5, 5}, 297 {0, 0}, 298 {0, 0}, 299 {0, 0} 300 } 301 }, 302 {1, 0, 2, 0, /* 0x21 */ 303 {{0, 0}, 304 {5, 5}, 305 {0, 0}, 306 {0, 0} 307 } 308 }, 309 {0, 0, 2, 0, /* 0x22 */ 310 {{1, 1}, 311 {5, 5}, 312 {0, 0}, 313 {0, 0} 314 } 315 }, 316 {1, 0, 2, 0, /* 0x23 */ 317 {{0, 1}, 318 {5, 5}, 319 {0, 0}, 320 {0, 0} 321 } 322 }, 323 {0, 0, 2, 0, /* 0x24 */ 324 {{2, 2}, 325 {5, 5}, 326 {0, 0}, 327 {0, 0} 328 } 329 }, 330 {1, 0, 3, 0, /* 0x25 */ 331 {{0, 0}, 332 {2, 2}, 333 {5, 5}, 334 {0, 0} 335 } 336 }, 337 {0, 0, 2, 0, /* 0x26 */ 338 {{1, 2}, 339 {5, 5}, 340 {0, 0}, 341 {0, 0} 342 } 343 }, 344 {1, 0, 2, 0, /* 0x27 */ 345 {{0, 2}, 346 {5, 5}, 347 {0, 0}, 348 {0, 0} 349 } 350 }, 351 {0, 0, 2, 0, /* 0x28 */ 352 {{3, 3}, 353 {5, 5}, 354 {0, 0}, 355 {0, 0} 356 } 357 }, 358 {1, 0, 3, 0, /* 0x29 */ 359 {{0, 0}, 360 {3, 3}, 361 {5, 5}, 362 {0, 0} 363 } 364 }, 365 {0, 0, 3, 0, /* 0x2a */ 366 {{1, 1}, 367 {3, 3}, 368 {5, 5}, 369 {0, 0} 370 } 371 }, 372 {1, 0, 3, 0, /* 0x2b */ 373 {{0, 1}, 374 {3, 3}, 375 {5, 5}, 376 {0, 0} 377 } 378 }, 379 {0, 0, 2, 0, /* 0x2c */ 380 {{2, 3}, 381 {5, 5}, 382 {0, 0}, 383 {0, 0} 384 } 385 }, 386 {1, 0, 3, 0, /* 0x2d */ 387 {{0, 0}, 388 {2, 3}, 389 {5, 5}, 390 {0, 0} 391 } 392 }, 393 {0, 0, 2, 0, /* 0x2e */ 394 {{1, 3}, 395 {5, 5}, 396 {0, 0}, 397 {0, 0} 398 } 399 }, 400 {1, 0, 2, 0, /* 0x2f */ 401 {{0, 3}, 402 {5, 5}, 403 {0, 0}, 404 {0, 0} 405 } 406 }, 407 {0, 0, 1, 0, /* 0x30 */ 408 {{4, 5}, 409 {0, 0}, 410 {0, 0}, 411 {0, 0} 412 } 413 }, 414 {1, 0, 2, 0, /* 0x31 */ 415 {{0, 0}, 416 {4, 5}, 417 {0, 0}, 418 {0, 0} 419 } 420 }, 421 {0, 0, 2, 0, /* 0x32 */ 422 {{1, 1}, 423 {4, 5}, 424 {0, 0}, 425 {0, 0} 426 } 427 }, 428 {1, 0, 2, 0, /* 0x33 */ 429 {{0, 1}, 430 {4, 5}, 431 {0, 0}, 432 {0, 0} 433 } 434 }, 435 {0, 0, 2, 0, /* 0x34 */ 436 {{2, 2}, 437 {4, 5}, 438 {0, 0}, 439 {0, 0} 440 } 441 }, 442 {1, 0, 3, 0, /* 0x35 */ 443 {{0, 0}, 444 {2, 2}, 445 {4, 5}, 446 {0, 0} 447 } 448 }, 449 {0, 0, 2, 0, /* 0x36 */ 450 {{1, 2}, 451 {4, 5}, 452 {0, 0}, 453 {0, 0} 454 } 455 }, 456 {1, 0, 2, 0, /* 0x37 */ 457 {{0, 2}, 458 {4, 5}, 459 {0, 0}, 460 {0, 0} 461 } 462 }, 463 {0, 0, 1, 0, /* 0x38 */ 464 {{3, 5}, 465 {0, 0}, 466 {0, 0}, 467 {0, 0} 468 } 469 }, 470 {1, 0, 2, 0, /* 0x39 */ 471 {{0, 0}, 472 {3, 5}, 473 {0, 0}, 474 {0, 0} 475 } 476 }, 477 {0, 0, 2, 0, /* 0x3a */ 478 {{1, 1}, 479 {3, 5}, 480 {0, 0}, 481 {0, 0} 482 } 483 }, 484 {1, 0, 2, 0, /* 0x3b */ 485 {{0, 1}, 486 {3, 5}, 487 {0, 0}, 488 {0, 0} 489 } 490 }, 491 {0, 0, 1, 0, /* 0x3c */ 492 {{2, 5}, 493 {0, 0}, 494 {0, 0}, 495 {0, 0} 496 } 497 }, 498 {1, 0, 2, 0, /* 0x3d */ 499 {{0, 0}, 500 {2, 5}, 501 {0, 0}, 502 {0, 0} 503 } 504 }, 505 {0, 0, 1, 0, /* 0x3e */ 506 {{1, 5}, 507 {0, 0}, 508 {0, 0}, 509 {0, 0} 510 } 511 }, 512 {1, 0, 1, 0, /* 0x3f */ 513 {{0, 5}, 514 {0, 0}, 515 {0, 0}, 516 {0, 0} 517 } 518 }, 519 {0, 0, 1, 0, /* 0x40 */ 520 {{6, 6}, 521 {0, 0}, 522 {0, 0}, 523 {0, 0} 524 } 525 }, 526 {1, 0, 2, 0, /* 0x41 */ 527 {{0, 0}, 528 {6, 6}, 529 {0, 0}, 530 {0, 0} 531 } 532 }, 533 {0, 0, 2, 0, /* 0x42 */ 534 {{1, 1}, 535 {6, 6}, 536 {0, 0}, 537 {0, 0} 538 } 539 }, 540 {1, 0, 2, 0, /* 0x43 */ 541 {{0, 1}, 542 {6, 6}, 543 {0, 0}, 544 {0, 0} 545 } 546 }, 547 {0, 0, 2, 0, /* 0x44 */ 548 {{2, 2}, 549 {6, 6}, 550 {0, 0}, 551 {0, 0} 552 } 553 }, 554 {1, 0, 3, 0, /* 0x45 */ 555 {{0, 0}, 556 {2, 2}, 557 {6, 6}, 558 {0, 0} 559 } 560 }, 561 {0, 0, 2, 0, /* 0x46 */ 562 {{1, 2}, 563 {6, 6}, 564 {0, 0}, 565 {0, 0} 566 } 567 }, 568 {1, 0, 2, 0, /* 0x47 */ 569 {{0, 2}, 570 {6, 6}, 571 {0, 0}, 572 {0, 0} 573 } 574 }, 575 {0, 0, 2, 0, /* 0x48 */ 576 {{3, 3}, 577 {6, 6}, 578 {0, 0}, 579 {0, 0} 580 } 581 }, 582 {1, 0, 3, 0, /* 0x49 */ 583 {{0, 0}, 584 {3, 3}, 585 {6, 6}, 586 {0, 0} 587 } 588 }, 589 {0, 0, 3, 0, /* 0x4a */ 590 {{1, 1}, 591 {3, 3}, 592 {6, 6}, 593 {0, 0} 594 } 595 }, 596 {1, 0, 3, 0, /* 0x4b */ 597 {{0, 1}, 598 {3, 3}, 599 {6, 6}, 600 {0, 0} 601 } 602 }, 603 {0, 0, 2, 0, /* 0x4c */ 604 {{2, 3}, 605 {6, 6}, 606 {0, 0}, 607 {0, 0} 608 } 609 }, 610 {1, 0, 3, 0, /* 0x4d */ 611 {{0, 0}, 612 {2, 3}, 613 {6, 6}, 614 {0, 0} 615 } 616 }, 617 {0, 0, 2, 0, /* 0x4e */ 618 {{1, 3}, 619 {6, 6}, 620 {0, 0}, 621 {0, 0} 622 } 623 }, 624 {1, 0, 2, 0, /* 0x4f */ 625 {{0, 3}, 626 {6, 6}, 627 {0, 0}, 628 {0, 0} 629 } 630 }, 631 {0, 0, 2, 0, /* 0x50 */ 632 {{4, 4}, 633 {6, 6}, 634 {0, 0}, 635 {0, 0} 636 } 637 }, 638 {1, 0, 3, 0, /* 0x51 */ 639 {{0, 0}, 640 {4, 4}, 641 {6, 6}, 642 {0, 0} 643 } 644 }, 645 {0, 0, 3, 0, /* 0x52 */ 646 {{1, 1}, 647 {4, 4}, 648 {6, 6}, 649 {0, 0} 650 } 651 }, 652 {1, 0, 3, 0, /* 0x53 */ 653 {{0, 1}, 654 {4, 4}, 655 {6, 6}, 656 {0, 0} 657 } 658 }, 659 {0, 0, 3, 0, /* 0x54 */ 660 {{2, 2}, 661 {4, 4}, 662 {6, 6}, 663 {0, 0} 664 } 665 }, 666 {1, 0, 4, 0, /* 0x55 */ 667 {{0, 0}, 668 {2, 2}, 669 {4, 4}, 670 {6, 6} 671 } 672 }, 673 {0, 0, 3, 0, /* 0x56 */ 674 {{1, 2}, 675 {4, 4}, 676 {6, 6}, 677 {0, 0} 678 } 679 }, 680 {1, 0, 3, 0, /* 0x57 */ 681 {{0, 2}, 682 {4, 4}, 683 {6, 6}, 684 {0, 0} 685 } 686 }, 687 {0, 0, 2, 0, /* 0x58 */ 688 {{3, 4}, 689 {6, 6}, 690 {0, 0}, 691 {0, 0} 692 } 693 }, 694 {1, 0, 3, 0, /* 0x59 */ 695 {{0, 0}, 696 {3, 4}, 697 {6, 6}, 698 {0, 0} 699 } 700 }, 701 {0, 0, 3, 0, /* 0x5a */ 702 {{1, 1}, 703 {3, 4}, 704 {6, 6}, 705 {0, 0} 706 } 707 }, 708 {1, 0, 3, 0, /* 0x5b */ 709 {{0, 1}, 710 {3, 4}, 711 {6, 6}, 712 {0, 0} 713 } 714 }, 715 {0, 0, 2, 0, /* 0x5c */ 716 {{2, 4}, 717 {6, 6}, 718 {0, 0}, 719 {0, 0} 720 } 721 }, 722 {1, 0, 3, 0, /* 0x5d */ 723 {{0, 0}, 724 {2, 4}, 725 {6, 6}, 726 {0, 0} 727 } 728 }, 729 {0, 0, 2, 0, /* 0x5e */ 730 {{1, 4}, 731 {6, 6}, 732 {0, 0}, 733 {0, 0} 734 } 735 }, 736 {1, 0, 2, 0, /* 0x5f */ 737 {{0, 4}, 738 {6, 6}, 739 {0, 0}, 740 {0, 0} 741 } 742 }, 743 {0, 0, 1, 0, /* 0x60 */ 744 {{5, 6}, 745 {0, 0}, 746 {0, 0}, 747 {0, 0} 748 } 749 }, 750 {1, 0, 2, 0, /* 0x61 */ 751 {{0, 0}, 752 {5, 6}, 753 {0, 0}, 754 {0, 0} 755 } 756 }, 757 {0, 0, 2, 0, /* 0x62 */ 758 {{1, 1}, 759 {5, 6}, 760 {0, 0}, 761 {0, 0} 762 } 763 }, 764 {1, 0, 2, 0, /* 0x63 */ 765 {{0, 1}, 766 {5, 6}, 767 {0, 0}, 768 {0, 0} 769 } 770 }, 771 {0, 0, 2, 0, /* 0x64 */ 772 {{2, 2}, 773 {5, 6}, 774 {0, 0}, 775 {0, 0} 776 } 777 }, 778 {1, 0, 3, 0, /* 0x65 */ 779 {{0, 0}, 780 {2, 2}, 781 {5, 6}, 782 {0, 0} 783 } 784 }, 785 {0, 0, 2, 0, /* 0x66 */ 786 {{1, 2}, 787 {5, 6}, 788 {0, 0}, 789 {0, 0} 790 } 791 }, 792 {1, 0, 2, 0, /* 0x67 */ 793 {{0, 2}, 794 {5, 6}, 795 {0, 0}, 796 {0, 0} 797 } 798 }, 799 {0, 0, 2, 0, /* 0x68 */ 800 {{3, 3}, 801 {5, 6}, 802 {0, 0}, 803 {0, 0} 804 } 805 }, 806 {1, 0, 3, 0, /* 0x69 */ 807 {{0, 0}, 808 {3, 3}, 809 {5, 6}, 810 {0, 0} 811 } 812 }, 813 {0, 0, 3, 0, /* 0x6a */ 814 {{1, 1}, 815 {3, 3}, 816 {5, 6}, 817 {0, 0} 818 } 819 }, 820 {1, 0, 3, 0, /* 0x6b */ 821 {{0, 1}, 822 {3, 3}, 823 {5, 6}, 824 {0, 0} 825 } 826 }, 827 {0, 0, 2, 0, /* 0x6c */ 828 {{2, 3}, 829 {5, 6}, 830 {0, 0}, 831 {0, 0} 832 } 833 }, 834 {1, 0, 3, 0, /* 0x6d */ 835 {{0, 0}, 836 {2, 3}, 837 {5, 6}, 838 {0, 0} 839 } 840 }, 841 {0, 0, 2, 0, /* 0x6e */ 842 {{1, 3}, 843 {5, 6}, 844 {0, 0}, 845 {0, 0} 846 } 847 }, 848 {1, 0, 2, 0, /* 0x6f */ 849 {{0, 3}, 850 {5, 6}, 851 {0, 0}, 852 {0, 0} 853 } 854 }, 855 {0, 0, 1, 0, /* 0x70 */ 856 {{4, 6}, 857 {0, 0}, 858 {0, 0}, 859 {0, 0} 860 } 861 }, 862 {1, 0, 2, 0, /* 0x71 */ 863 {{0, 0}, 864 {4, 6}, 865 {0, 0}, 866 {0, 0} 867 } 868 }, 869 {0, 0, 2, 0, /* 0x72 */ 870 {{1, 1}, 871 {4, 6}, 872 {0, 0}, 873 {0, 0} 874 } 875 }, 876 {1, 0, 2, 0, /* 0x73 */ 877 {{0, 1}, 878 {4, 6}, 879 {0, 0}, 880 {0, 0} 881 } 882 }, 883 {0, 0, 2, 0, /* 0x74 */ 884 {{2, 2}, 885 {4, 6}, 886 {0, 0}, 887 {0, 0} 888 } 889 }, 890 {1, 0, 3, 0, /* 0x75 */ 891 {{0, 0}, 892 {2, 2}, 893 {4, 6}, 894 {0, 0} 895 } 896 }, 897 {0, 0, 2, 0, /* 0x76 */ 898 {{1, 2}, 899 {4, 6}, 900 {0, 0}, 901 {0, 0} 902 } 903 }, 904 {1, 0, 2, 0, /* 0x77 */ 905 {{0, 2}, 906 {4, 6}, 907 {0, 0}, 908 {0, 0} 909 } 910 }, 911 {0, 0, 1, 0, /* 0x78 */ 912 {{3, 6}, 913 {0, 0}, 914 {0, 0}, 915 {0, 0} 916 } 917 }, 918 {1, 0, 2, 0, /* 0x79 */ 919 {{0, 0}, 920 {3, 6}, 921 {0, 0}, 922 {0, 0} 923 } 924 }, 925 {0, 0, 2, 0, /* 0x7a */ 926 {{1, 1}, 927 {3, 6}, 928 {0, 0}, 929 {0, 0} 930 } 931 }, 932 {1, 0, 2, 0, /* 0x7b */ 933 {{0, 1}, 934 {3, 6}, 935 {0, 0}, 936 {0, 0} 937 } 938 }, 939 {0, 0, 1, 0, /* 0x7c */ 940 {{2, 6}, 941 {0, 0}, 942 {0, 0}, 943 {0, 0} 944 } 945 }, 946 {1, 0, 2, 0, /* 0x7d */ 947 {{0, 0}, 948 {2, 6}, 949 {0, 0}, 950 {0, 0} 951 } 952 }, 953 {0, 0, 1, 0, /* 0x7e */ 954 {{1, 6}, 955 {0, 0}, 956 {0, 0}, 957 {0, 0} 958 } 959 }, 960 {1, 0, 1, 0, /* 0x7f */ 961 {{0, 6}, 962 {0, 0}, 963 {0, 0}, 964 {0, 0} 965 } 966 }, 967 {0, 1, 1, 0, /* 0x80 */ 968 {{7, 7}, 969 {0, 0}, 970 {0, 0}, 971 {0, 0} 972 } 973 }, 974 {1, 1, 2, 0, /* 0x81 */ 975 {{0, 0}, 976 {7, 7}, 977 {0, 0}, 978 {0, 0} 979 } 980 }, 981 {0, 1, 2, 0, /* 0x82 */ 982 {{1, 1}, 983 {7, 7}, 984 {0, 0}, 985 {0, 0} 986 } 987 }, 988 {1, 1, 2, 0, /* 0x83 */ 989 {{0, 1}, 990 {7, 7}, 991 {0, 0}, 992 {0, 0} 993 } 994 }, 995 {0, 1, 2, 0, /* 0x84 */ 996 {{2, 2}, 997 {7, 7}, 998 {0, 0}, 999 {0, 0} 1000 } 1001 }, 1002 {1, 1, 3, 0, /* 0x85 */ 1003 {{0, 0}, 1004 {2, 2}, 1005 {7, 7}, 1006 {0, 0} 1007 } 1008 }, 1009 {0, 1, 2, 0, /* 0x86 */ 1010 {{1, 2}, 1011 {7, 7}, 1012 {0, 0}, 1013 {0, 0} 1014 } 1015 }, 1016 {1, 1, 2, 0, /* 0x87 */ 1017 {{0, 2}, 1018 {7, 7}, 1019 {0, 0}, 1020 {0, 0} 1021 } 1022 }, 1023 {0, 1, 2, 0, /* 0x88 */ 1024 {{3, 3}, 1025 {7, 7}, 1026 {0, 0}, 1027 {0, 0} 1028 } 1029 }, 1030 {1, 1, 3, 0, /* 0x89 */ 1031 {{0, 0}, 1032 {3, 3}, 1033 {7, 7}, 1034 {0, 0} 1035 } 1036 }, 1037 {0, 1, 3, 0, /* 0x8a */ 1038 {{1, 1}, 1039 {3, 3}, 1040 {7, 7}, 1041 {0, 0} 1042 } 1043 }, 1044 {1, 1, 3, 0, /* 0x8b */ 1045 {{0, 1}, 1046 {3, 3}, 1047 {7, 7}, 1048 {0, 0} 1049 } 1050 }, 1051 {0, 1, 2, 0, /* 0x8c */ 1052 {{2, 3}, 1053 {7, 7}, 1054 {0, 0}, 1055 {0, 0} 1056 } 1057 }, 1058 {1, 1, 3, 0, /* 0x8d */ 1059 {{0, 0}, 1060 {2, 3}, 1061 {7, 7}, 1062 {0, 0} 1063 } 1064 }, 1065 {0, 1, 2, 0, /* 0x8e */ 1066 {{1, 3}, 1067 {7, 7}, 1068 {0, 0}, 1069 {0, 0} 1070 } 1071 }, 1072 {1, 1, 2, 0, /* 0x8f */ 1073 {{0, 3}, 1074 {7, 7}, 1075 {0, 0}, 1076 {0, 0} 1077 } 1078 }, 1079 {0, 1, 2, 0, /* 0x90 */ 1080 {{4, 4}, 1081 {7, 7}, 1082 {0, 0}, 1083 {0, 0} 1084 } 1085 }, 1086 {1, 1, 3, 0, /* 0x91 */ 1087 {{0, 0}, 1088 {4, 4}, 1089 {7, 7}, 1090 {0, 0} 1091 } 1092 }, 1093 {0, 1, 3, 0, /* 0x92 */ 1094 {{1, 1}, 1095 {4, 4}, 1096 {7, 7}, 1097 {0, 0} 1098 } 1099 }, 1100 {1, 1, 3, 0, /* 0x93 */ 1101 {{0, 1}, 1102 {4, 4}, 1103 {7, 7}, 1104 {0, 0} 1105 } 1106 }, 1107 {0, 1, 3, 0, /* 0x94 */ 1108 {{2, 2}, 1109 {4, 4}, 1110 {7, 7}, 1111 {0, 0} 1112 } 1113 }, 1114 {1, 1, 4, 0, /* 0x95 */ 1115 {{0, 0}, 1116 {2, 2}, 1117 {4, 4}, 1118 {7, 7} 1119 } 1120 }, 1121 {0, 1, 3, 0, /* 0x96 */ 1122 {{1, 2}, 1123 {4, 4}, 1124 {7, 7}, 1125 {0, 0} 1126 } 1127 }, 1128 {1, 1, 3, 0, /* 0x97 */ 1129 {{0, 2}, 1130 {4, 4}, 1131 {7, 7}, 1132 {0, 0} 1133 } 1134 }, 1135 {0, 1, 2, 0, /* 0x98 */ 1136 {{3, 4}, 1137 {7, 7}, 1138 {0, 0}, 1139 {0, 0} 1140 } 1141 }, 1142 {1, 1, 3, 0, /* 0x99 */ 1143 {{0, 0}, 1144 {3, 4}, 1145 {7, 7}, 1146 {0, 0} 1147 } 1148 }, 1149 {0, 1, 3, 0, /* 0x9a */ 1150 {{1, 1}, 1151 {3, 4}, 1152 {7, 7}, 1153 {0, 0} 1154 } 1155 }, 1156 {1, 1, 3, 0, /* 0x9b */ 1157 {{0, 1}, 1158 {3, 4}, 1159 {7, 7}, 1160 {0, 0} 1161 } 1162 }, 1163 {0, 1, 2, 0, /* 0x9c */ 1164 {{2, 4}, 1165 {7, 7}, 1166 {0, 0}, 1167 {0, 0} 1168 } 1169 }, 1170 {1, 1, 3, 0, /* 0x9d */ 1171 {{0, 0}, 1172 {2, 4}, 1173 {7, 7}, 1174 {0, 0} 1175 } 1176 }, 1177 {0, 1, 2, 0, /* 0x9e */ 1178 {{1, 4}, 1179 {7, 7}, 1180 {0, 0}, 1181 {0, 0} 1182 } 1183 }, 1184 {1, 1, 2, 0, /* 0x9f */ 1185 {{0, 4}, 1186 {7, 7}, 1187 {0, 0}, 1188 {0, 0} 1189 } 1190 }, 1191 {0, 1, 2, 0, /* 0xa0 */ 1192 {{5, 5}, 1193 {7, 7}, 1194 {0, 0}, 1195 {0, 0} 1196 } 1197 }, 1198 {1, 1, 3, 0, /* 0xa1 */ 1199 {{0, 0}, 1200 {5, 5}, 1201 {7, 7}, 1202 {0, 0} 1203 } 1204 }, 1205 {0, 1, 3, 0, /* 0xa2 */ 1206 {{1, 1}, 1207 {5, 5}, 1208 {7, 7}, 1209 {0, 0} 1210 } 1211 }, 1212 {1, 1, 3, 0, /* 0xa3 */ 1213 {{0, 1}, 1214 {5, 5}, 1215 {7, 7}, 1216 {0, 0} 1217 } 1218 }, 1219 {0, 1, 3, 0, /* 0xa4 */ 1220 {{2, 2}, 1221 {5, 5}, 1222 {7, 7}, 1223 {0, 0} 1224 } 1225 }, 1226 {1, 1, 4, 0, /* 0xa5 */ 1227 {{0, 0}, 1228 {2, 2}, 1229 {5, 5}, 1230 {7, 7} 1231 } 1232 }, 1233 {0, 1, 3, 0, /* 0xa6 */ 1234 {{1, 2}, 1235 {5, 5}, 1236 {7, 7}, 1237 {0, 0} 1238 } 1239 }, 1240 {1, 1, 3, 0, /* 0xa7 */ 1241 {{0, 2}, 1242 {5, 5}, 1243 {7, 7}, 1244 {0, 0} 1245 } 1246 }, 1247 {0, 1, 3, 0, /* 0xa8 */ 1248 {{3, 3}, 1249 {5, 5}, 1250 {7, 7}, 1251 {0, 0} 1252 } 1253 }, 1254 {1, 1, 4, 0, /* 0xa9 */ 1255 {{0, 0}, 1256 {3, 3}, 1257 {5, 5}, 1258 {7, 7} 1259 } 1260 }, 1261 {0, 1, 4, 0, /* 0xaa */ 1262 {{1, 1}, 1263 {3, 3}, 1264 {5, 5}, 1265 {7, 7} 1266 } 1267 }, 1268 {1, 1, 4, 0, /* 0xab */ 1269 {{0, 1}, 1270 {3, 3}, 1271 {5, 5}, 1272 {7, 7} 1273 } 1274 }, 1275 {0, 1, 3, 0, /* 0xac */ 1276 {{2, 3}, 1277 {5, 5}, 1278 {7, 7}, 1279 {0, 0} 1280 } 1281 }, 1282 {1, 1, 4, 0, /* 0xad */ 1283 {{0, 0}, 1284 {2, 3}, 1285 {5, 5}, 1286 {7, 7} 1287 } 1288 }, 1289 {0, 1, 3, 0, /* 0xae */ 1290 {{1, 3}, 1291 {5, 5}, 1292 {7, 7}, 1293 {0, 0} 1294 } 1295 }, 1296 {1, 1, 3, 0, /* 0xaf */ 1297 {{0, 3}, 1298 {5, 5}, 1299 {7, 7}, 1300 {0, 0} 1301 } 1302 }, 1303 {0, 1, 2, 0, /* 0xb0 */ 1304 {{4, 5}, 1305 {7, 7}, 1306 {0, 0}, 1307 {0, 0} 1308 } 1309 }, 1310 {1, 1, 3, 0, /* 0xb1 */ 1311 {{0, 0}, 1312 {4, 5}, 1313 {7, 7}, 1314 {0, 0} 1315 } 1316 }, 1317 {0, 1, 3, 0, /* 0xb2 */ 1318 {{1, 1}, 1319 {4, 5}, 1320 {7, 7}, 1321 {0, 0} 1322 } 1323 }, 1324 {1, 1, 3, 0, /* 0xb3 */ 1325 {{0, 1}, 1326 {4, 5}, 1327 {7, 7}, 1328 {0, 0} 1329 } 1330 }, 1331 {0, 1, 3, 0, /* 0xb4 */ 1332 {{2, 2}, 1333 {4, 5}, 1334 {7, 7}, 1335 {0, 0} 1336 } 1337 }, 1338 {1, 1, 4, 0, /* 0xb5 */ 1339 {{0, 0}, 1340 {2, 2}, 1341 {4, 5}, 1342 {7, 7} 1343 } 1344 }, 1345 {0, 1, 3, 0, /* 0xb6 */ 1346 {{1, 2}, 1347 {4, 5}, 1348 {7, 7}, 1349 {0, 0} 1350 } 1351 }, 1352 {1, 1, 3, 0, /* 0xb7 */ 1353 {{0, 2}, 1354 {4, 5}, 1355 {7, 7}, 1356 {0, 0} 1357 } 1358 }, 1359 {0, 1, 2, 0, /* 0xb8 */ 1360 {{3, 5}, 1361 {7, 7}, 1362 {0, 0}, 1363 {0, 0} 1364 } 1365 }, 1366 {1, 1, 3, 0, /* 0xb9 */ 1367 {{0, 0}, 1368 {3, 5}, 1369 {7, 7}, 1370 {0, 0} 1371 } 1372 }, 1373 {0, 1, 3, 0, /* 0xba */ 1374 {{1, 1}, 1375 {3, 5}, 1376 {7, 7}, 1377 {0, 0} 1378 } 1379 }, 1380 {1, 1, 3, 0, /* 0xbb */ 1381 {{0, 1}, 1382 {3, 5}, 1383 {7, 7}, 1384 {0, 0} 1385 } 1386 }, 1387 {0, 1, 2, 0, /* 0xbc */ 1388 {{2, 5}, 1389 {7, 7}, 1390 {0, 0}, 1391 {0, 0} 1392 } 1393 }, 1394 {1, 1, 3, 0, /* 0xbd */ 1395 {{0, 0}, 1396 {2, 5}, 1397 {7, 7}, 1398 {0, 0} 1399 } 1400 }, 1401 {0, 1, 2, 0, /* 0xbe */ 1402 {{1, 5}, 1403 {7, 7}, 1404 {0, 0}, 1405 {0, 0} 1406 } 1407 }, 1408 {1, 1, 2, 0, /* 0xbf */ 1409 {{0, 5}, 1410 {7, 7}, 1411 {0, 0}, 1412 {0, 0} 1413 } 1414 }, 1415 {0, 1, 1, 0, /* 0xc0 */ 1416 {{6, 7}, 1417 {0, 0}, 1418 {0, 0}, 1419 {0, 0} 1420 } 1421 }, 1422 {1, 1, 2, 0, /* 0xc1 */ 1423 {{0, 0}, 1424 {6, 7}, 1425 {0, 0}, 1426 {0, 0} 1427 } 1428 }, 1429 {0, 1, 2, 0, /* 0xc2 */ 1430 {{1, 1}, 1431 {6, 7}, 1432 {0, 0}, 1433 {0, 0} 1434 } 1435 }, 1436 {1, 1, 2, 0, /* 0xc3 */ 1437 {{0, 1}, 1438 {6, 7}, 1439 {0, 0}, 1440 {0, 0} 1441 } 1442 }, 1443 {0, 1, 2, 0, /* 0xc4 */ 1444 {{2, 2}, 1445 {6, 7}, 1446 {0, 0}, 1447 {0, 0} 1448 } 1449 }, 1450 {1, 1, 3, 0, /* 0xc5 */ 1451 {{0, 0}, 1452 {2, 2}, 1453 {6, 7}, 1454 {0, 0} 1455 } 1456 }, 1457 {0, 1, 2, 0, /* 0xc6 */ 1458 {{1, 2}, 1459 {6, 7}, 1460 {0, 0}, 1461 {0, 0} 1462 } 1463 }, 1464 {1, 1, 2, 0, /* 0xc7 */ 1465 {{0, 2}, 1466 {6, 7}, 1467 {0, 0}, 1468 {0, 0} 1469 } 1470 }, 1471 {0, 1, 2, 0, /* 0xc8 */ 1472 {{3, 3}, 1473 {6, 7}, 1474 {0, 0}, 1475 {0, 0} 1476 } 1477 }, 1478 {1, 1, 3, 0, /* 0xc9 */ 1479 {{0, 0}, 1480 {3, 3}, 1481 {6, 7}, 1482 {0, 0} 1483 } 1484 }, 1485 {0, 1, 3, 0, /* 0xca */ 1486 {{1, 1}, 1487 {3, 3}, 1488 {6, 7}, 1489 {0, 0} 1490 } 1491 }, 1492 {1, 1, 3, 0, /* 0xcb */ 1493 {{0, 1}, 1494 {3, 3}, 1495 {6, 7}, 1496 {0, 0} 1497 } 1498 }, 1499 {0, 1, 2, 0, /* 0xcc */ 1500 {{2, 3}, 1501 {6, 7}, 1502 {0, 0}, 1503 {0, 0} 1504 } 1505 }, 1506 {1, 1, 3, 0, /* 0xcd */ 1507 {{0, 0}, 1508 {2, 3}, 1509 {6, 7}, 1510 {0, 0} 1511 } 1512 }, 1513 {0, 1, 2, 0, /* 0xce */ 1514 {{1, 3}, 1515 {6, 7}, 1516 {0, 0}, 1517 {0, 0} 1518 } 1519 }, 1520 {1, 1, 2, 0, /* 0xcf */ 1521 {{0, 3}, 1522 {6, 7}, 1523 {0, 0}, 1524 {0, 0} 1525 } 1526 }, 1527 {0, 1, 2, 0, /* 0xd0 */ 1528 {{4, 4}, 1529 {6, 7}, 1530 {0, 0}, 1531 {0, 0} 1532 } 1533 }, 1534 {1, 1, 3, 0, /* 0xd1 */ 1535 {{0, 0}, 1536 {4, 4}, 1537 {6, 7}, 1538 {0, 0} 1539 } 1540 }, 1541 {0, 1, 3, 0, /* 0xd2 */ 1542 {{1, 1}, 1543 {4, 4}, 1544 {6, 7}, 1545 {0, 0} 1546 } 1547 }, 1548 {1, 1, 3, 0, /* 0xd3 */ 1549 {{0, 1}, 1550 {4, 4}, 1551 {6, 7}, 1552 {0, 0} 1553 } 1554 }, 1555 {0, 1, 3, 0, /* 0xd4 */ 1556 {{2, 2}, 1557 {4, 4}, 1558 {6, 7}, 1559 {0, 0} 1560 } 1561 }, 1562 {1, 1, 4, 0, /* 0xd5 */ 1563 {{0, 0}, 1564 {2, 2}, 1565 {4, 4}, 1566 {6, 7} 1567 } 1568 }, 1569 {0, 1, 3, 0, /* 0xd6 */ 1570 {{1, 2}, 1571 {4, 4}, 1572 {6, 7}, 1573 {0, 0} 1574 } 1575 }, 1576 {1, 1, 3, 0, /* 0xd7 */ 1577 {{0, 2}, 1578 {4, 4}, 1579 {6, 7}, 1580 {0, 0} 1581 } 1582 }, 1583 {0, 1, 2, 0, /* 0xd8 */ 1584 {{3, 4}, 1585 {6, 7}, 1586 {0, 0}, 1587 {0, 0} 1588 } 1589 }, 1590 {1, 1, 3, 0, /* 0xd9 */ 1591 {{0, 0}, 1592 {3, 4}, 1593 {6, 7}, 1594 {0, 0} 1595 } 1596 }, 1597 {0, 1, 3, 0, /* 0xda */ 1598 {{1, 1}, 1599 {3, 4}, 1600 {6, 7}, 1601 {0, 0} 1602 } 1603 }, 1604 {1, 1, 3, 0, /* 0xdb */ 1605 {{0, 1}, 1606 {3, 4}, 1607 {6, 7}, 1608 {0, 0} 1609 } 1610 }, 1611 {0, 1, 2, 0, /* 0xdc */ 1612 {{2, 4}, 1613 {6, 7}, 1614 {0, 0}, 1615 {0, 0} 1616 } 1617 }, 1618 {1, 1, 3, 0, /* 0xdd */ 1619 {{0, 0}, 1620 {2, 4}, 1621 {6, 7}, 1622 {0, 0} 1623 } 1624 }, 1625 {0, 1, 2, 0, /* 0xde */ 1626 {{1, 4}, 1627 {6, 7}, 1628 {0, 0}, 1629 {0, 0} 1630 } 1631 }, 1632 {1, 1, 2, 0, /* 0xdf */ 1633 {{0, 4}, 1634 {6, 7}, 1635 {0, 0}, 1636 {0, 0} 1637 } 1638 }, 1639 {0, 1, 1, 0, /* 0xe0 */ 1640 {{5, 7}, 1641 {0, 0}, 1642 {0, 0}, 1643 {0, 0} 1644 } 1645 }, 1646 {1, 1, 2, 0, /* 0xe1 */ 1647 {{0, 0}, 1648 {5, 7}, 1649 {0, 0}, 1650 {0, 0} 1651 } 1652 }, 1653 {0, 1, 2, 0, /* 0xe2 */ 1654 {{1, 1}, 1655 {5, 7}, 1656 {0, 0}, 1657 {0, 0} 1658 } 1659 }, 1660 {1, 1, 2, 0, /* 0xe3 */ 1661 {{0, 1}, 1662 {5, 7}, 1663 {0, 0}, 1664 {0, 0} 1665 } 1666 }, 1667 {0, 1, 2, 0, /* 0xe4 */ 1668 {{2, 2}, 1669 {5, 7}, 1670 {0, 0}, 1671 {0, 0} 1672 } 1673 }, 1674 {1, 1, 3, 0, /* 0xe5 */ 1675 {{0, 0}, 1676 {2, 2}, 1677 {5, 7}, 1678 {0, 0} 1679 } 1680 }, 1681 {0, 1, 2, 0, /* 0xe6 */ 1682 {{1, 2}, 1683 {5, 7}, 1684 {0, 0}, 1685 {0, 0} 1686 } 1687 }, 1688 {1, 1, 2, 0, /* 0xe7 */ 1689 {{0, 2}, 1690 {5, 7}, 1691 {0, 0}, 1692 {0, 0} 1693 } 1694 }, 1695 {0, 1, 2, 0, /* 0xe8 */ 1696 {{3, 3}, 1697 {5, 7}, 1698 {0, 0}, 1699 {0, 0} 1700 } 1701 }, 1702 {1, 1, 3, 0, /* 0xe9 */ 1703 {{0, 0}, 1704 {3, 3}, 1705 {5, 7}, 1706 {0, 0} 1707 } 1708 }, 1709 {0, 1, 3, 0, /* 0xea */ 1710 {{1, 1}, 1711 {3, 3}, 1712 {5, 7}, 1713 {0, 0} 1714 } 1715 }, 1716 {1, 1, 3, 0, /* 0xeb */ 1717 {{0, 1}, 1718 {3, 3}, 1719 {5, 7}, 1720 {0, 0} 1721 } 1722 }, 1723 {0, 1, 2, 0, /* 0xec */ 1724 {{2, 3}, 1725 {5, 7}, 1726 {0, 0}, 1727 {0, 0} 1728 } 1729 }, 1730 {1, 1, 3, 0, /* 0xed */ 1731 {{0, 0}, 1732 {2, 3}, 1733 {5, 7}, 1734 {0, 0} 1735 } 1736 }, 1737 {0, 1, 2, 0, /* 0xee */ 1738 {{1, 3}, 1739 {5, 7}, 1740 {0, 0}, 1741 {0, 0} 1742 } 1743 }, 1744 {1, 1, 2, 0, /* 0xef */ 1745 {{0, 3}, 1746 {5, 7}, 1747 {0, 0}, 1748 {0, 0} 1749 } 1750 }, 1751 {0, 1, 1, 0, /* 0xf0 */ 1752 {{4, 7}, 1753 {0, 0}, 1754 {0, 0}, 1755 {0, 0} 1756 } 1757 }, 1758 {1, 1, 2, 0, /* 0xf1 */ 1759 {{0, 0}, 1760 {4, 7}, 1761 {0, 0}, 1762 {0, 0} 1763 } 1764 }, 1765 {0, 1, 2, 0, /* 0xf2 */ 1766 {{1, 1}, 1767 {4, 7}, 1768 {0, 0}, 1769 {0, 0} 1770 } 1771 }, 1772 {1, 1, 2, 0, /* 0xf3 */ 1773 {{0, 1}, 1774 {4, 7}, 1775 {0, 0}, 1776 {0, 0} 1777 } 1778 }, 1779 {0, 1, 2, 0, /* 0xf4 */ 1780 {{2, 2}, 1781 {4, 7}, 1782 {0, 0}, 1783 {0, 0} 1784 } 1785 }, 1786 {1, 1, 3, 0, /* 0xf5 */ 1787 {{0, 0}, 1788 {2, 2}, 1789 {4, 7}, 1790 {0, 0} 1791 } 1792 }, 1793 {0, 1, 2, 0, /* 0xf6 */ 1794 {{1, 2}, 1795 {4, 7}, 1796 {0, 0}, 1797 {0, 0} 1798 } 1799 }, 1800 {1, 1, 2, 0, /* 0xf7 */ 1801 {{0, 2}, 1802 {4, 7}, 1803 {0, 0}, 1804 {0, 0} 1805 } 1806 }, 1807 {0, 1, 1, 0, /* 0xf8 */ 1808 {{3, 7}, 1809 {0, 0}, 1810 {0, 0}, 1811 {0, 0} 1812 } 1813 }, 1814 {1, 1, 2, 0, /* 0xf9 */ 1815 {{0, 0}, 1816 {3, 7}, 1817 {0, 0}, 1818 {0, 0} 1819 } 1820 }, 1821 {0, 1, 2, 0, /* 0xfa */ 1822 {{1, 1}, 1823 {3, 7}, 1824 {0, 0}, 1825 {0, 0} 1826 } 1827 }, 1828 {1, 1, 2, 0, /* 0xfb */ 1829 {{0, 1}, 1830 {3, 7}, 1831 {0, 0}, 1832 {0, 0} 1833 } 1834 }, 1835 {0, 1, 1, 0, /* 0xfc */ 1836 {{2, 7}, 1837 {0, 0}, 1838 {0, 0}, 1839 {0, 0} 1840 } 1841 }, 1842 {1, 1, 2, 0, /* 0xfd */ 1843 {{0, 0}, 1844 {2, 7}, 1845 {0, 0}, 1846 {0, 0} 1847 } 1848 }, 1849 {0, 1, 1, 0, /* 0xfe */ 1850 {{1, 7}, 1851 {0, 0}, 1852 {0, 0}, 1853 {0, 0} 1854 } 1855 }, 1856 {1, 1, 1, 0, /* 0xff */ 1857 {{0, 7}, 1858 {0, 0}, 1859 {0, 0}, 1860 {0, 0} 1861 } 1862 } 1863}; 1864 1865 1866int 1867sctp_is_address_in_scope(struct sctp_ifa *ifa, 1868 struct sctp_scoping *scope, 1869 int do_update) 1870{ 1871 if ((scope->loopback_scope == 0) && 1872 (ifa->ifn_p) && SCTP_IFN_IS_IFT_LOOP(ifa->ifn_p)) { 1873 /* 1874 * skip loopback if not in scope * 1875 */ 1876 return (0); 1877 } 1878 switch (ifa->address.sa.sa_family) { 1879#ifdef INET 1880 case AF_INET: 1881 if (scope->ipv4_addr_legal) { 1882 struct sockaddr_in *sin; 1883 1884 sin = &ifa->address.sin; 1885 if (sin->sin_addr.s_addr == 0) { 1886 /* not in scope , unspecified */ 1887 return (0); 1888 } 1889 if ((scope->ipv4_local_scope == 0) && 1890 (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 1891 /* private address not in scope */ 1892 return (0); 1893 } 1894 } else { 1895 return (0); 1896 } 1897 break; 1898#endif 1899#ifdef INET6 1900 case AF_INET6: 1901 if (scope->ipv6_addr_legal) { 1902 struct sockaddr_in6 *sin6; 1903 1904 /* 1905 * Must update the flags, bummer, which means any 1906 * IFA locks must now be applied HERE <-> 1907 */ 1908 if (do_update) { 1909 sctp_gather_internal_ifa_flags(ifa); 1910 } 1911 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 1912 return (0); 1913 } 1914 /* ok to use deprecated addresses? */ 1915 sin6 = &ifa->address.sin6; 1916 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1917 /* skip unspecifed addresses */ 1918 return (0); 1919 } 1920 if ( /* (local_scope == 0) && */ 1921 (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))) { 1922 return (0); 1923 } 1924 if ((scope->site_scope == 0) && 1925 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1926 return (0); 1927 } 1928 } else { 1929 return (0); 1930 } 1931 break; 1932#endif 1933 default: 1934 return (0); 1935 } 1936 return (1); 1937} 1938 1939static struct mbuf * 1940sctp_add_addr_to_mbuf(struct mbuf *m, struct sctp_ifa *ifa, uint16_t * len) 1941{ 1942#if defined(INET) || defined(INET6) 1943 struct sctp_paramhdr *parmh; 1944 struct mbuf *mret; 1945 uint16_t plen; 1946 1947#endif 1948 1949 switch (ifa->address.sa.sa_family) { 1950#ifdef INET 1951 case AF_INET: 1952 plen = (uint16_t) sizeof(struct sctp_ipv4addr_param); 1953 break; 1954#endif 1955#ifdef INET6 1956 case AF_INET6: 1957 plen = (uint16_t) sizeof(struct sctp_ipv6addr_param); 1958 break; 1959#endif 1960 default: 1961 return (m); 1962 } 1963#if defined(INET) || defined(INET6) 1964 if (M_TRAILINGSPACE(m) >= plen) { 1965 /* easy side we just drop it on the end */ 1966 parmh = (struct sctp_paramhdr *)(SCTP_BUF_AT(m, SCTP_BUF_LEN(m))); 1967 mret = m; 1968 } else { 1969 /* Need more space */ 1970 mret = m; 1971 while (SCTP_BUF_NEXT(mret) != NULL) { 1972 mret = SCTP_BUF_NEXT(mret); 1973 } 1974 SCTP_BUF_NEXT(mret) = sctp_get_mbuf_for_msg(plen, 0, M_NOWAIT, 1, MT_DATA); 1975 if (SCTP_BUF_NEXT(mret) == NULL) { 1976 /* We are hosed, can't add more addresses */ 1977 return (m); 1978 } 1979 mret = SCTP_BUF_NEXT(mret); 1980 parmh = mtod(mret, struct sctp_paramhdr *); 1981 } 1982 /* now add the parameter */ 1983 switch (ifa->address.sa.sa_family) { 1984#ifdef INET 1985 case AF_INET: 1986 { 1987 struct sctp_ipv4addr_param *ipv4p; 1988 struct sockaddr_in *sin; 1989 1990 sin = &ifa->address.sin; 1991 ipv4p = (struct sctp_ipv4addr_param *)parmh; 1992 parmh->param_type = htons(SCTP_IPV4_ADDRESS); 1993 parmh->param_length = htons(plen); 1994 ipv4p->addr = sin->sin_addr.s_addr; 1995 SCTP_BUF_LEN(mret) += plen; 1996 break; 1997 } 1998#endif 1999#ifdef INET6 2000 case AF_INET6: 2001 { 2002 struct sctp_ipv6addr_param *ipv6p; 2003 struct sockaddr_in6 *sin6; 2004 2005 sin6 = &ifa->address.sin6; 2006 ipv6p = (struct sctp_ipv6addr_param *)parmh; 2007 parmh->param_type = htons(SCTP_IPV6_ADDRESS); 2008 parmh->param_length = htons(plen); 2009 memcpy(ipv6p->addr, &sin6->sin6_addr, 2010 sizeof(ipv6p->addr)); 2011 /* clear embedded scope in the address */ 2012 in6_clearscope((struct in6_addr *)ipv6p->addr); 2013 SCTP_BUF_LEN(mret) += plen; 2014 break; 2015 } 2016#endif 2017 default: 2018 return (m); 2019 } 2020 if (len != NULL) { 2021 *len += plen; 2022 } 2023 return (mret); 2024#endif 2025} 2026 2027 2028struct mbuf * 2029sctp_add_addresses_to_i_ia(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 2030 struct sctp_scoping *scope, 2031 struct mbuf *m_at, int cnt_inits_to, 2032 uint16_t * padding_len, uint16_t * chunk_len) 2033{ 2034 struct sctp_vrf *vrf = NULL; 2035 int cnt, limit_out = 0, total_count; 2036 uint32_t vrf_id; 2037 2038 vrf_id = inp->def_vrf_id; 2039 SCTP_IPI_ADDR_RLOCK(); 2040 vrf = sctp_find_vrf(vrf_id); 2041 if (vrf == NULL) { 2042 SCTP_IPI_ADDR_RUNLOCK(); 2043 return (m_at); 2044 } 2045 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 2046 struct sctp_ifa *sctp_ifap; 2047 struct sctp_ifn *sctp_ifnp; 2048 2049 cnt = cnt_inits_to; 2050 if (vrf->total_ifa_count > SCTP_COUNT_LIMIT) { 2051 limit_out = 1; 2052 cnt = SCTP_ADDRESS_LIMIT; 2053 goto skip_count; 2054 } 2055 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2056 if ((scope->loopback_scope == 0) && 2057 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2058 /* 2059 * Skip loopback devices if loopback_scope 2060 * not set 2061 */ 2062 continue; 2063 } 2064 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2065#ifdef INET 2066 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2067 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2068 &sctp_ifap->address.sin.sin_addr) != 0)) { 2069 continue; 2070 } 2071#endif 2072#ifdef INET6 2073 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2074 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2075 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2076 continue; 2077 } 2078#endif 2079 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2080 continue; 2081 } 2082 if (sctp_is_address_in_scope(sctp_ifap, scope, 1) == 0) { 2083 continue; 2084 } 2085 cnt++; 2086 if (cnt > SCTP_ADDRESS_LIMIT) { 2087 break; 2088 } 2089 } 2090 if (cnt > SCTP_ADDRESS_LIMIT) { 2091 break; 2092 } 2093 } 2094skip_count: 2095 if (cnt > 1) { 2096 total_count = 0; 2097 LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { 2098 cnt = 0; 2099 if ((scope->loopback_scope == 0) && 2100 SCTP_IFN_IS_IFT_LOOP(sctp_ifnp)) { 2101 /* 2102 * Skip loopback devices if 2103 * loopback_scope not set 2104 */ 2105 continue; 2106 } 2107 LIST_FOREACH(sctp_ifap, &sctp_ifnp->ifalist, next_ifa) { 2108#ifdef INET 2109 if ((sctp_ifap->address.sa.sa_family == AF_INET) && 2110 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2111 &sctp_ifap->address.sin.sin_addr) != 0)) { 2112 continue; 2113 } 2114#endif 2115#ifdef INET6 2116 if ((sctp_ifap->address.sa.sa_family == AF_INET6) && 2117 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2118 &sctp_ifap->address.sin6.sin6_addr) != 0)) { 2119 continue; 2120 } 2121#endif 2122 if (sctp_is_addr_restricted(stcb, sctp_ifap)) { 2123 continue; 2124 } 2125 if (sctp_is_address_in_scope(sctp_ifap, 2126 scope, 0) == 0) { 2127 continue; 2128 } 2129 if ((chunk_len != NULL) && 2130 (padding_len != NULL) && 2131 (*padding_len > 0)) { 2132 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2133 SCTP_BUF_LEN(m_at) += *padding_len; 2134 *chunk_len += *padding_len; 2135 *padding_len = 0; 2136 } 2137 m_at = sctp_add_addr_to_mbuf(m_at, sctp_ifap, chunk_len); 2138 if (limit_out) { 2139 cnt++; 2140 total_count++; 2141 if (cnt >= 2) { 2142 /* 2143 * two from each 2144 * address 2145 */ 2146 break; 2147 } 2148 if (total_count > SCTP_ADDRESS_LIMIT) { 2149 /* No more addresses */ 2150 break; 2151 } 2152 } 2153 } 2154 } 2155 } 2156 } else { 2157 struct sctp_laddr *laddr; 2158 2159 cnt = cnt_inits_to; 2160 /* First, how many ? */ 2161 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2162 if (laddr->ifa == NULL) { 2163 continue; 2164 } 2165 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) 2166 /* 2167 * Address being deleted by the system, dont 2168 * list. 2169 */ 2170 continue; 2171 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2172 /* 2173 * Address being deleted on this ep don't 2174 * list. 2175 */ 2176 continue; 2177 } 2178 if (sctp_is_address_in_scope(laddr->ifa, 2179 scope, 1) == 0) { 2180 continue; 2181 } 2182 cnt++; 2183 } 2184 /* 2185 * To get through a NAT we only list addresses if we have 2186 * more than one. That way if you just bind a single address 2187 * we let the source of the init dictate our address. 2188 */ 2189 if (cnt > 1) { 2190 cnt = cnt_inits_to; 2191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2192 if (laddr->ifa == NULL) { 2193 continue; 2194 } 2195 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 2196 continue; 2197 } 2198 if (sctp_is_address_in_scope(laddr->ifa, 2199 scope, 0) == 0) { 2200 continue; 2201 } 2202 if ((chunk_len != NULL) && 2203 (padding_len != NULL) && 2204 (*padding_len > 0)) { 2205 memset(mtod(m_at, caddr_t)+*chunk_len, 0, *padding_len); 2206 SCTP_BUF_LEN(m_at) += *padding_len; 2207 *chunk_len += *padding_len; 2208 *padding_len = 0; 2209 } 2210 m_at = sctp_add_addr_to_mbuf(m_at, laddr->ifa, chunk_len); 2211 cnt++; 2212 if (cnt >= SCTP_ADDRESS_LIMIT) { 2213 break; 2214 } 2215 } 2216 } 2217 } 2218 SCTP_IPI_ADDR_RUNLOCK(); 2219 return (m_at); 2220} 2221 2222static struct sctp_ifa * 2223sctp_is_ifa_addr_preferred(struct sctp_ifa *ifa, 2224 uint8_t dest_is_loop, 2225 uint8_t dest_is_priv, 2226 sa_family_t fam) 2227{ 2228 uint8_t dest_is_global = 0; 2229 2230 /* dest_is_priv is true if destination is a private address */ 2231 /* dest_is_loop is true if destination is a loopback addresses */ 2232 2233 /** 2234 * Here we determine if its a preferred address. A preferred address 2235 * means it is the same scope or higher scope then the destination. 2236 * L = loopback, P = private, G = global 2237 * ----------------------------------------- 2238 * src | dest | result 2239 * ---------------------------------------- 2240 * L | L | yes 2241 * ----------------------------------------- 2242 * P | L | yes-v4 no-v6 2243 * ----------------------------------------- 2244 * G | L | yes-v4 no-v6 2245 * ----------------------------------------- 2246 * L | P | no 2247 * ----------------------------------------- 2248 * P | P | yes 2249 * ----------------------------------------- 2250 * G | P | no 2251 * ----------------------------------------- 2252 * L | G | no 2253 * ----------------------------------------- 2254 * P | G | no 2255 * ----------------------------------------- 2256 * G | G | yes 2257 * ----------------------------------------- 2258 */ 2259 2260 if (ifa->address.sa.sa_family != fam) { 2261 /* forget mis-matched family */ 2262 return (NULL); 2263 } 2264 if ((dest_is_priv == 0) && (dest_is_loop == 0)) { 2265 dest_is_global = 1; 2266 } 2267 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Is destination preferred:"); 2268 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &ifa->address.sa); 2269 /* Ok the address may be ok */ 2270#ifdef INET6 2271 if (fam == AF_INET6) { 2272 /* ok to use deprecated addresses? no lets not! */ 2273 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2274 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:1\n"); 2275 return (NULL); 2276 } 2277 if (ifa->src_is_priv && !ifa->src_is_loop) { 2278 if (dest_is_loop) { 2279 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:2\n"); 2280 return (NULL); 2281 } 2282 } 2283 if (ifa->src_is_glob) { 2284 if (dest_is_loop) { 2285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:3\n"); 2286 return (NULL); 2287 } 2288 } 2289 } 2290#endif 2291 /* 2292 * Now that we know what is what, implement or table this could in 2293 * theory be done slicker (it used to be), but this is 2294 * straightforward and easier to validate :-) 2295 */ 2296 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src_loop:%d src_priv:%d src_glob:%d\n", 2297 ifa->src_is_loop, ifa->src_is_priv, ifa->src_is_glob); 2298 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dest_loop:%d dest_priv:%d dest_glob:%d\n", 2299 dest_is_loop, dest_is_priv, dest_is_global); 2300 2301 if ((ifa->src_is_loop) && (dest_is_priv)) { 2302 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:4\n"); 2303 return (NULL); 2304 } 2305 if ((ifa->src_is_glob) && (dest_is_priv)) { 2306 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:5\n"); 2307 return (NULL); 2308 } 2309 if ((ifa->src_is_loop) && (dest_is_global)) { 2310 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:6\n"); 2311 return (NULL); 2312 } 2313 if ((ifa->src_is_priv) && (dest_is_global)) { 2314 SCTPDBG(SCTP_DEBUG_OUTPUT3, "NO:7\n"); 2315 return (NULL); 2316 } 2317 SCTPDBG(SCTP_DEBUG_OUTPUT3, "YES\n"); 2318 /* its a preferred address */ 2319 return (ifa); 2320} 2321 2322static struct sctp_ifa * 2323sctp_is_ifa_addr_acceptable(struct sctp_ifa *ifa, 2324 uint8_t dest_is_loop, 2325 uint8_t dest_is_priv, 2326 sa_family_t fam) 2327{ 2328 uint8_t dest_is_global = 0; 2329 2330 /** 2331 * Here we determine if its a acceptable address. A acceptable 2332 * address means it is the same scope or higher scope but we can 2333 * allow for NAT which means its ok to have a global dest and a 2334 * private src. 2335 * 2336 * L = loopback, P = private, G = global 2337 * ----------------------------------------- 2338 * src | dest | result 2339 * ----------------------------------------- 2340 * L | L | yes 2341 * ----------------------------------------- 2342 * P | L | yes-v4 no-v6 2343 * ----------------------------------------- 2344 * G | L | yes 2345 * ----------------------------------------- 2346 * L | P | no 2347 * ----------------------------------------- 2348 * P | P | yes 2349 * ----------------------------------------- 2350 * G | P | yes - May not work 2351 * ----------------------------------------- 2352 * L | G | no 2353 * ----------------------------------------- 2354 * P | G | yes - May not work 2355 * ----------------------------------------- 2356 * G | G | yes 2357 * ----------------------------------------- 2358 */ 2359 2360 if (ifa->address.sa.sa_family != fam) { 2361 /* forget non matching family */ 2362 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa_fam:%d fam:%d\n", 2363 ifa->address.sa.sa_family, fam); 2364 return (NULL); 2365 } 2366 /* Ok the address may be ok */ 2367 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, &ifa->address.sa); 2368 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst_is_loop:%d dest_is_priv:%d\n", 2369 dest_is_loop, dest_is_priv); 2370 if ((dest_is_loop == 0) && (dest_is_priv == 0)) { 2371 dest_is_global = 1; 2372 } 2373#ifdef INET6 2374 if (fam == AF_INET6) { 2375 /* ok to use deprecated addresses? */ 2376 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2377 return (NULL); 2378 } 2379 if (ifa->src_is_priv) { 2380 /* Special case, linklocal to loop */ 2381 if (dest_is_loop) 2382 return (NULL); 2383 } 2384 } 2385#endif 2386 /* 2387 * Now that we know what is what, implement our table. This could in 2388 * theory be done slicker (it used to be), but this is 2389 * straightforward and easier to validate :-) 2390 */ 2391 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_priv:%d\n", 2392 ifa->src_is_loop, 2393 dest_is_priv); 2394 if ((ifa->src_is_loop == 1) && (dest_is_priv)) { 2395 return (NULL); 2396 } 2397 SCTPDBG(SCTP_DEBUG_OUTPUT3, "ifa->src_is_loop:%d dest_is_glob:%d\n", 2398 ifa->src_is_loop, 2399 dest_is_global); 2400 if ((ifa->src_is_loop == 1) && (dest_is_global)) { 2401 return (NULL); 2402 } 2403 SCTPDBG(SCTP_DEBUG_OUTPUT3, "address is acceptable\n"); 2404 /* its an acceptable address */ 2405 return (ifa); 2406} 2407 2408int 2409sctp_is_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 2410{ 2411 struct sctp_laddr *laddr; 2412 2413 if (stcb == NULL) { 2414 /* There are no restrictions, no TCB :-) */ 2415 return (0); 2416 } 2417 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 2418 if (laddr->ifa == NULL) { 2419 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2420 __func__); 2421 continue; 2422 } 2423 if (laddr->ifa == ifa) { 2424 /* Yes it is on the list */ 2425 return (1); 2426 } 2427 } 2428 return (0); 2429} 2430 2431 2432int 2433sctp_is_addr_in_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 2434{ 2435 struct sctp_laddr *laddr; 2436 2437 if (ifa == NULL) 2438 return (0); 2439 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 2440 if (laddr->ifa == NULL) { 2441 SCTPDBG(SCTP_DEBUG_OUTPUT1, "%s: NULL ifa\n", 2442 __func__); 2443 continue; 2444 } 2445 if ((laddr->ifa == ifa) && laddr->action == 0) 2446 /* same pointer */ 2447 return (1); 2448 } 2449 return (0); 2450} 2451 2452 2453 2454static struct sctp_ifa * 2455sctp_choose_boundspecific_inp(struct sctp_inpcb *inp, 2456 sctp_route_t * ro, 2457 uint32_t vrf_id, 2458 int non_asoc_addr_ok, 2459 uint8_t dest_is_priv, 2460 uint8_t dest_is_loop, 2461 sa_family_t fam) 2462{ 2463 struct sctp_laddr *laddr, *starting_point; 2464 void *ifn; 2465 int resettotop = 0; 2466 struct sctp_ifn *sctp_ifn; 2467 struct sctp_ifa *sctp_ifa, *sifa; 2468 struct sctp_vrf *vrf; 2469 uint32_t ifn_index; 2470 2471 vrf = sctp_find_vrf(vrf_id); 2472 if (vrf == NULL) 2473 return (NULL); 2474 2475 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2476 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2477 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2478 /* 2479 * first question, is the ifn we will emit on in our list, if so, we 2480 * want such an address. Note that we first looked for a preferred 2481 * address. 2482 */ 2483 if (sctp_ifn) { 2484 /* is a preferred one on the interface we route out? */ 2485 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2486#ifdef INET 2487 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2488 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2489 &sctp_ifa->address.sin.sin_addr) != 0)) { 2490 continue; 2491 } 2492#endif 2493#ifdef INET6 2494 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2495 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2496 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2497 continue; 2498 } 2499#endif 2500 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2501 (non_asoc_addr_ok == 0)) 2502 continue; 2503 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, 2504 dest_is_loop, 2505 dest_is_priv, fam); 2506 if (sifa == NULL) 2507 continue; 2508 if (sctp_is_addr_in_ep(inp, sifa)) { 2509 atomic_add_int(&sifa->refcount, 1); 2510 return (sifa); 2511 } 2512 } 2513 } 2514 /* 2515 * ok, now we now need to find one on the list of the addresses. We 2516 * can't get one on the emitting interface so let's find first a 2517 * preferred one. If not that an acceptable one otherwise... we 2518 * return NULL. 2519 */ 2520 starting_point = inp->next_addr_touse; 2521once_again: 2522 if (inp->next_addr_touse == NULL) { 2523 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2524 resettotop = 1; 2525 } 2526 for (laddr = inp->next_addr_touse; laddr; 2527 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2528 if (laddr->ifa == NULL) { 2529 /* address has been removed */ 2530 continue; 2531 } 2532 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2533 /* address is being deleted */ 2534 continue; 2535 } 2536 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, 2537 dest_is_priv, fam); 2538 if (sifa == NULL) 2539 continue; 2540 atomic_add_int(&sifa->refcount, 1); 2541 return (sifa); 2542 } 2543 if (resettotop == 0) { 2544 inp->next_addr_touse = NULL; 2545 goto once_again; 2546 } 2547 inp->next_addr_touse = starting_point; 2548 resettotop = 0; 2549once_again_too: 2550 if (inp->next_addr_touse == NULL) { 2551 inp->next_addr_touse = LIST_FIRST(&inp->sctp_addr_list); 2552 resettotop = 1; 2553 } 2554 /* ok, what about an acceptable address in the inp */ 2555 for (laddr = inp->next_addr_touse; laddr; 2556 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2557 if (laddr->ifa == NULL) { 2558 /* address has been removed */ 2559 continue; 2560 } 2561 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2562 /* address is being deleted */ 2563 continue; 2564 } 2565 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2566 dest_is_priv, fam); 2567 if (sifa == NULL) 2568 continue; 2569 atomic_add_int(&sifa->refcount, 1); 2570 return (sifa); 2571 } 2572 if (resettotop == 0) { 2573 inp->next_addr_touse = NULL; 2574 goto once_again_too; 2575 } 2576 /* 2577 * no address bound can be a source for the destination we are in 2578 * trouble 2579 */ 2580 return (NULL); 2581} 2582 2583 2584 2585static struct sctp_ifa * 2586sctp_choose_boundspecific_stcb(struct sctp_inpcb *inp, 2587 struct sctp_tcb *stcb, 2588 sctp_route_t * ro, 2589 uint32_t vrf_id, 2590 uint8_t dest_is_priv, 2591 uint8_t dest_is_loop, 2592 int non_asoc_addr_ok, 2593 sa_family_t fam) 2594{ 2595 struct sctp_laddr *laddr, *starting_point; 2596 void *ifn; 2597 struct sctp_ifn *sctp_ifn; 2598 struct sctp_ifa *sctp_ifa, *sifa; 2599 uint8_t start_at_beginning = 0; 2600 struct sctp_vrf *vrf; 2601 uint32_t ifn_index; 2602 2603 /* 2604 * first question, is the ifn we will emit on in our list, if so, we 2605 * want that one. 2606 */ 2607 vrf = sctp_find_vrf(vrf_id); 2608 if (vrf == NULL) 2609 return (NULL); 2610 2611 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2612 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2613 sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2614 2615 /* 2616 * first question, is the ifn we will emit on in our list? If so, 2617 * we want that one. First we look for a preferred. Second, we go 2618 * for an acceptable. 2619 */ 2620 if (sctp_ifn) { 2621 /* first try for a preferred address on the ep */ 2622 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2623#ifdef INET 2624 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2625 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2626 &sctp_ifa->address.sin.sin_addr) != 0)) { 2627 continue; 2628 } 2629#endif 2630#ifdef INET6 2631 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2632 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2633 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2634 continue; 2635 } 2636#endif 2637 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2638 continue; 2639 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2640 sifa = sctp_is_ifa_addr_preferred(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2641 if (sifa == NULL) 2642 continue; 2643 if (((non_asoc_addr_ok == 0) && 2644 (sctp_is_addr_restricted(stcb, sifa))) || 2645 (non_asoc_addr_ok && 2646 (sctp_is_addr_restricted(stcb, sifa)) && 2647 (!sctp_is_addr_pending(stcb, sifa)))) { 2648 /* on the no-no list */ 2649 continue; 2650 } 2651 atomic_add_int(&sifa->refcount, 1); 2652 return (sifa); 2653 } 2654 } 2655 /* next try for an acceptable address on the ep */ 2656 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 2657#ifdef INET 2658 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 2659 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2660 &sctp_ifa->address.sin.sin_addr) != 0)) { 2661 continue; 2662 } 2663#endif 2664#ifdef INET6 2665 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 2666 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2667 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 2668 continue; 2669 } 2670#endif 2671 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && (non_asoc_addr_ok == 0)) 2672 continue; 2673 if (sctp_is_addr_in_ep(inp, sctp_ifa)) { 2674 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, dest_is_priv, fam); 2675 if (sifa == NULL) 2676 continue; 2677 if (((non_asoc_addr_ok == 0) && 2678 (sctp_is_addr_restricted(stcb, sifa))) || 2679 (non_asoc_addr_ok && 2680 (sctp_is_addr_restricted(stcb, sifa)) && 2681 (!sctp_is_addr_pending(stcb, sifa)))) { 2682 /* on the no-no list */ 2683 continue; 2684 } 2685 atomic_add_int(&sifa->refcount, 1); 2686 return (sifa); 2687 } 2688 } 2689 2690 } 2691 /* 2692 * if we can't find one like that then we must look at all addresses 2693 * bound to pick one at first preferable then secondly acceptable. 2694 */ 2695 starting_point = stcb->asoc.last_used_address; 2696sctp_from_the_top: 2697 if (stcb->asoc.last_used_address == NULL) { 2698 start_at_beginning = 1; 2699 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2700 } 2701 /* search beginning with the last used address */ 2702 for (laddr = stcb->asoc.last_used_address; laddr; 2703 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2704 if (laddr->ifa == NULL) { 2705 /* address has been removed */ 2706 continue; 2707 } 2708 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2709 /* address is being deleted */ 2710 continue; 2711 } 2712 sifa = sctp_is_ifa_addr_preferred(laddr->ifa, dest_is_loop, dest_is_priv, fam); 2713 if (sifa == NULL) 2714 continue; 2715 if (((non_asoc_addr_ok == 0) && 2716 (sctp_is_addr_restricted(stcb, sifa))) || 2717 (non_asoc_addr_ok && 2718 (sctp_is_addr_restricted(stcb, sifa)) && 2719 (!sctp_is_addr_pending(stcb, sifa)))) { 2720 /* on the no-no list */ 2721 continue; 2722 } 2723 stcb->asoc.last_used_address = laddr; 2724 atomic_add_int(&sifa->refcount, 1); 2725 return (sifa); 2726 } 2727 if (start_at_beginning == 0) { 2728 stcb->asoc.last_used_address = NULL; 2729 goto sctp_from_the_top; 2730 } 2731 /* now try for any higher scope than the destination */ 2732 stcb->asoc.last_used_address = starting_point; 2733 start_at_beginning = 0; 2734sctp_from_the_top2: 2735 if (stcb->asoc.last_used_address == NULL) { 2736 start_at_beginning = 1; 2737 stcb->asoc.last_used_address = LIST_FIRST(&inp->sctp_addr_list); 2738 } 2739 /* search beginning with the last used address */ 2740 for (laddr = stcb->asoc.last_used_address; laddr; 2741 laddr = LIST_NEXT(laddr, sctp_nxt_addr)) { 2742 if (laddr->ifa == NULL) { 2743 /* address has been removed */ 2744 continue; 2745 } 2746 if (laddr->action == SCTP_DEL_IP_ADDRESS) { 2747 /* address is being deleted */ 2748 continue; 2749 } 2750 sifa = sctp_is_ifa_addr_acceptable(laddr->ifa, dest_is_loop, 2751 dest_is_priv, fam); 2752 if (sifa == NULL) 2753 continue; 2754 if (((non_asoc_addr_ok == 0) && 2755 (sctp_is_addr_restricted(stcb, sifa))) || 2756 (non_asoc_addr_ok && 2757 (sctp_is_addr_restricted(stcb, sifa)) && 2758 (!sctp_is_addr_pending(stcb, sifa)))) { 2759 /* on the no-no list */ 2760 continue; 2761 } 2762 stcb->asoc.last_used_address = laddr; 2763 atomic_add_int(&sifa->refcount, 1); 2764 return (sifa); 2765 } 2766 if (start_at_beginning == 0) { 2767 stcb->asoc.last_used_address = NULL; 2768 goto sctp_from_the_top2; 2769 } 2770 return (NULL); 2771} 2772 2773static struct sctp_ifa * 2774sctp_select_nth_preferred_addr_from_ifn_boundall(struct sctp_ifn *ifn, 2775 struct sctp_inpcb *inp, 2776 struct sctp_tcb *stcb, 2777 int non_asoc_addr_ok, 2778 uint8_t dest_is_loop, 2779 uint8_t dest_is_priv, 2780 int addr_wanted, 2781 sa_family_t fam, 2782 sctp_route_t * ro 2783) 2784{ 2785 struct sctp_ifa *ifa, *sifa; 2786 int num_eligible_addr = 0; 2787 2788#ifdef INET6 2789 struct sockaddr_in6 sin6, lsa6; 2790 2791 if (fam == AF_INET6) { 2792 memcpy(&sin6, &ro->ro_dst, sizeof(struct sockaddr_in6)); 2793 (void)sa6_recoverscope(&sin6); 2794 } 2795#endif /* INET6 */ 2796 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2797#ifdef INET 2798 if ((ifa->address.sa.sa_family == AF_INET) && 2799 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2800 &ifa->address.sin.sin_addr) != 0)) { 2801 continue; 2802 } 2803#endif 2804#ifdef INET6 2805 if ((ifa->address.sa.sa_family == AF_INET6) && 2806 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2807 &ifa->address.sin6.sin6_addr) != 0)) { 2808 continue; 2809 } 2810#endif 2811 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2812 (non_asoc_addr_ok == 0)) 2813 continue; 2814 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2815 dest_is_priv, fam); 2816 if (sifa == NULL) 2817 continue; 2818#ifdef INET6 2819 if (fam == AF_INET6 && 2820 dest_is_loop && 2821 sifa->src_is_loop && sifa->src_is_priv) { 2822 /* 2823 * don't allow fe80::1 to be a src on loop ::1, we 2824 * don't list it to the peer so we will get an 2825 * abort. 2826 */ 2827 continue; 2828 } 2829 if (fam == AF_INET6 && 2830 IN6_IS_ADDR_LINKLOCAL(&sifa->address.sin6.sin6_addr) && 2831 IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 2832 /* 2833 * link-local <-> link-local must belong to the same 2834 * scope. 2835 */ 2836 memcpy(&lsa6, &sifa->address.sin6, sizeof(struct sockaddr_in6)); 2837 (void)sa6_recoverscope(&lsa6); 2838 if (sin6.sin6_scope_id != lsa6.sin6_scope_id) { 2839 continue; 2840 } 2841 } 2842#endif /* INET6 */ 2843 2844 /* 2845 * Check if the IPv6 address matches to next-hop. In the 2846 * mobile case, old IPv6 address may be not deleted from the 2847 * interface. Then, the interface has previous and new 2848 * addresses. We should use one corresponding to the 2849 * next-hop. (by micchie) 2850 */ 2851#ifdef INET6 2852 if (stcb && fam == AF_INET6 && 2853 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2854 if (sctp_v6src_match_nexthop(&sifa->address.sin6, ro) 2855 == 0) { 2856 continue; 2857 } 2858 } 2859#endif 2860#ifdef INET 2861 /* Avoid topologically incorrect IPv4 address */ 2862 if (stcb && fam == AF_INET && 2863 sctp_is_mobility_feature_on(stcb->sctp_ep, SCTP_MOBILITY_BASE)) { 2864 if (sctp_v4src_match_nexthop(sifa, ro) == 0) { 2865 continue; 2866 } 2867 } 2868#endif 2869 if (stcb) { 2870 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2871 continue; 2872 } 2873 if (((non_asoc_addr_ok == 0) && 2874 (sctp_is_addr_restricted(stcb, sifa))) || 2875 (non_asoc_addr_ok && 2876 (sctp_is_addr_restricted(stcb, sifa)) && 2877 (!sctp_is_addr_pending(stcb, sifa)))) { 2878 /* 2879 * It is restricted for some reason.. 2880 * probably not yet added. 2881 */ 2882 continue; 2883 } 2884 } 2885 if (num_eligible_addr >= addr_wanted) { 2886 return (sifa); 2887 } 2888 num_eligible_addr++; 2889 } 2890 return (NULL); 2891} 2892 2893 2894static int 2895sctp_count_num_preferred_boundall(struct sctp_ifn *ifn, 2896 struct sctp_inpcb *inp, 2897 struct sctp_tcb *stcb, 2898 int non_asoc_addr_ok, 2899 uint8_t dest_is_loop, 2900 uint8_t dest_is_priv, 2901 sa_family_t fam) 2902{ 2903 struct sctp_ifa *ifa, *sifa; 2904 int num_eligible_addr = 0; 2905 2906 LIST_FOREACH(ifa, &ifn->ifalist, next_ifa) { 2907#ifdef INET 2908 if ((ifa->address.sa.sa_family == AF_INET) && 2909 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 2910 &ifa->address.sin.sin_addr) != 0)) { 2911 continue; 2912 } 2913#endif 2914#ifdef INET6 2915 if ((ifa->address.sa.sa_family == AF_INET6) && 2916 (stcb != NULL) && 2917 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 2918 &ifa->address.sin6.sin6_addr) != 0)) { 2919 continue; 2920 } 2921#endif 2922 if ((ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 2923 (non_asoc_addr_ok == 0)) { 2924 continue; 2925 } 2926 sifa = sctp_is_ifa_addr_preferred(ifa, dest_is_loop, 2927 dest_is_priv, fam); 2928 if (sifa == NULL) { 2929 continue; 2930 } 2931 if (stcb) { 2932 if (sctp_is_address_in_scope(ifa, &stcb->asoc.scope, 0) == 0) { 2933 continue; 2934 } 2935 if (((non_asoc_addr_ok == 0) && 2936 (sctp_is_addr_restricted(stcb, sifa))) || 2937 (non_asoc_addr_ok && 2938 (sctp_is_addr_restricted(stcb, sifa)) && 2939 (!sctp_is_addr_pending(stcb, sifa)))) { 2940 /* 2941 * It is restricted for some reason.. 2942 * probably not yet added. 2943 */ 2944 continue; 2945 } 2946 } 2947 num_eligible_addr++; 2948 } 2949 return (num_eligible_addr); 2950} 2951 2952static struct sctp_ifa * 2953sctp_choose_boundall(struct sctp_inpcb *inp, 2954 struct sctp_tcb *stcb, 2955 struct sctp_nets *net, 2956 sctp_route_t * ro, 2957 uint32_t vrf_id, 2958 uint8_t dest_is_priv, 2959 uint8_t dest_is_loop, 2960 int non_asoc_addr_ok, 2961 sa_family_t fam) 2962{ 2963 int cur_addr_num = 0, num_preferred = 0; 2964 void *ifn; 2965 struct sctp_ifn *sctp_ifn, *looked_at = NULL, *emit_ifn; 2966 struct sctp_ifa *sctp_ifa, *sifa; 2967 uint32_t ifn_index; 2968 struct sctp_vrf *vrf; 2969 2970#ifdef INET 2971 int retried = 0; 2972 2973#endif 2974 2975 /*- 2976 * For boundall we can use any address in the association. 2977 * If non_asoc_addr_ok is set we can use any address (at least in 2978 * theory). So we look for preferred addresses first. If we find one, 2979 * we use it. Otherwise we next try to get an address on the 2980 * interface, which we should be able to do (unless non_asoc_addr_ok 2981 * is false and we are routed out that way). In these cases where we 2982 * can't use the address of the interface we go through all the 2983 * ifn's looking for an address we can use and fill that in. Punting 2984 * means we send back address 0, which will probably cause problems 2985 * actually since then IP will fill in the address of the route ifn, 2986 * which means we probably already rejected it.. i.e. here comes an 2987 * abort :-<. 2988 */ 2989 vrf = sctp_find_vrf(vrf_id); 2990 if (vrf == NULL) 2991 return (NULL); 2992 2993 ifn = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 2994 ifn_index = SCTP_GET_IF_INDEX_FROM_ROUTE(ro); 2995 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn from route:%p ifn_index:%d\n", ifn, ifn_index); 2996 emit_ifn = looked_at = sctp_ifn = sctp_find_ifn(ifn, ifn_index); 2997 if (sctp_ifn == NULL) { 2998 /* ?? We don't have this guy ?? */ 2999 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No ifn emit interface?\n"); 3000 goto bound_all_plan_b; 3001 } 3002 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifn_index:%d name:%s is emit interface\n", 3003 ifn_index, sctp_ifn->ifn_name); 3004 3005 if (net) { 3006 cur_addr_num = net->indx_of_eligible_next_to_use; 3007 } 3008 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, 3009 inp, stcb, 3010 non_asoc_addr_ok, 3011 dest_is_loop, 3012 dest_is_priv, fam); 3013 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Found %d preferred source addresses for intf:%s\n", 3014 num_preferred, sctp_ifn->ifn_name); 3015 if (num_preferred == 0) { 3016 /* 3017 * no eligible addresses, we must use some other interface 3018 * address if we can find one. 3019 */ 3020 goto bound_all_plan_b; 3021 } 3022 /* 3023 * Ok we have num_eligible_addr set with how many we can use, this 3024 * may vary from call to call due to addresses being deprecated 3025 * etc.. 3026 */ 3027 if (cur_addr_num >= num_preferred) { 3028 cur_addr_num = 0; 3029 } 3030 /* 3031 * select the nth address from the list (where cur_addr_num is the 3032 * nth) and 0 is the first one, 1 is the second one etc... 3033 */ 3034 SCTPDBG(SCTP_DEBUG_OUTPUT2, "cur_addr_num:%d\n", cur_addr_num); 3035 3036 sctp_ifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3037 dest_is_priv, cur_addr_num, fam, ro); 3038 3039 /* if sctp_ifa is NULL something changed??, fall to plan b. */ 3040 if (sctp_ifa) { 3041 atomic_add_int(&sctp_ifa->refcount, 1); 3042 if (net) { 3043 /* save off where the next one we will want */ 3044 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3045 } 3046 return (sctp_ifa); 3047 } 3048 /* 3049 * plan_b: Look at all interfaces and find a preferred address. If 3050 * no preferred fall through to plan_c. 3051 */ 3052bound_all_plan_b: 3053 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan B\n"); 3054 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3055 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Examine interface %s\n", 3056 sctp_ifn->ifn_name); 3057 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3058 /* wrong base scope */ 3059 SCTPDBG(SCTP_DEBUG_OUTPUT2, "skip\n"); 3060 continue; 3061 } 3062 if ((sctp_ifn == looked_at) && looked_at) { 3063 /* already looked at this guy */ 3064 SCTPDBG(SCTP_DEBUG_OUTPUT2, "already seen\n"); 3065 continue; 3066 } 3067 num_preferred = sctp_count_num_preferred_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, 3068 dest_is_loop, dest_is_priv, fam); 3069 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3070 "Found ifn:%p %d preferred source addresses\n", 3071 ifn, num_preferred); 3072 if (num_preferred == 0) { 3073 /* None on this interface. */ 3074 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefered -- skipping to next\n"); 3075 continue; 3076 } 3077 SCTPDBG(SCTP_DEBUG_OUTPUT2, 3078 "num preferred:%d on interface:%p cur_addr_num:%d\n", 3079 num_preferred, (void *)sctp_ifn, cur_addr_num); 3080 3081 /* 3082 * Ok we have num_eligible_addr set with how many we can 3083 * use, this may vary from call to call due to addresses 3084 * being deprecated etc.. 3085 */ 3086 if (cur_addr_num >= num_preferred) { 3087 cur_addr_num = 0; 3088 } 3089 sifa = sctp_select_nth_preferred_addr_from_ifn_boundall(sctp_ifn, inp, stcb, non_asoc_addr_ok, dest_is_loop, 3090 dest_is_priv, cur_addr_num, fam, ro); 3091 if (sifa == NULL) 3092 continue; 3093 if (net) { 3094 net->indx_of_eligible_next_to_use = cur_addr_num + 1; 3095 SCTPDBG(SCTP_DEBUG_OUTPUT2, "we selected %d\n", 3096 cur_addr_num); 3097 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Source:"); 3098 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 3099 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Dest:"); 3100 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &net->ro._l_addr.sa); 3101 } 3102 atomic_add_int(&sifa->refcount, 1); 3103 return (sifa); 3104 } 3105#ifdef INET 3106again_with_private_addresses_allowed: 3107#endif 3108 /* plan_c: do we have an acceptable address on the emit interface */ 3109 sifa = NULL; 3110 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan C: find acceptable on interface\n"); 3111 if (emit_ifn == NULL) { 3112 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jump to Plan D - no emit_ifn\n"); 3113 goto plan_d; 3114 } 3115 LIST_FOREACH(sctp_ifa, &emit_ifn->ifalist, next_ifa) { 3116 SCTPDBG(SCTP_DEBUG_OUTPUT2, "ifa:%p\n", (void *)sctp_ifa); 3117#ifdef INET 3118 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3119 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3120 &sctp_ifa->address.sin.sin_addr) != 0)) { 3121 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3122 continue; 3123 } 3124#endif 3125#ifdef INET6 3126 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3127 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3128 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3129 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Jailed\n"); 3130 continue; 3131 } 3132#endif 3133 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3134 (non_asoc_addr_ok == 0)) { 3135 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Defer\n"); 3136 continue; 3137 } 3138 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, dest_is_loop, 3139 dest_is_priv, fam); 3140 if (sifa == NULL) { 3141 SCTPDBG(SCTP_DEBUG_OUTPUT2, "IFA not acceptable\n"); 3142 continue; 3143 } 3144 if (stcb) { 3145 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3146 SCTPDBG(SCTP_DEBUG_OUTPUT2, "NOT in scope\n"); 3147 sifa = NULL; 3148 continue; 3149 } 3150 if (((non_asoc_addr_ok == 0) && 3151 (sctp_is_addr_restricted(stcb, sifa))) || 3152 (non_asoc_addr_ok && 3153 (sctp_is_addr_restricted(stcb, sifa)) && 3154 (!sctp_is_addr_pending(stcb, sifa)))) { 3155 /* 3156 * It is restricted for some reason.. 3157 * probably not yet added. 3158 */ 3159 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Its resticted\n"); 3160 sifa = NULL; 3161 continue; 3162 } 3163 } 3164 atomic_add_int(&sifa->refcount, 1); 3165 goto out; 3166 } 3167plan_d: 3168 /* 3169 * plan_d: We are in trouble. No preferred address on the emit 3170 * interface. And not even a preferred address on all interfaces. Go 3171 * out and see if we can find an acceptable address somewhere 3172 * amongst all interfaces. 3173 */ 3174 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Trying Plan D looked_at is %p\n", (void *)looked_at); 3175 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3176 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3177 /* wrong base scope */ 3178 continue; 3179 } 3180 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3181#ifdef INET 3182 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3183 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3184 &sctp_ifa->address.sin.sin_addr) != 0)) { 3185 continue; 3186 } 3187#endif 3188#ifdef INET6 3189 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3190 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3191 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3192 continue; 3193 } 3194#endif 3195 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3196 (non_asoc_addr_ok == 0)) 3197 continue; 3198 sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3199 dest_is_loop, 3200 dest_is_priv, fam); 3201 if (sifa == NULL) 3202 continue; 3203 if (stcb) { 3204 if (sctp_is_address_in_scope(sifa, &stcb->asoc.scope, 0) == 0) { 3205 sifa = NULL; 3206 continue; 3207 } 3208 if (((non_asoc_addr_ok == 0) && 3209 (sctp_is_addr_restricted(stcb, sifa))) || 3210 (non_asoc_addr_ok && 3211 (sctp_is_addr_restricted(stcb, sifa)) && 3212 (!sctp_is_addr_pending(stcb, sifa)))) { 3213 /* 3214 * It is restricted for some 3215 * reason.. probably not yet added. 3216 */ 3217 sifa = NULL; 3218 continue; 3219 } 3220 } 3221 goto out; 3222 } 3223 } 3224#ifdef INET 3225 if (stcb) { 3226 if ((retried == 0) && (stcb->asoc.scope.ipv4_local_scope == 0)) { 3227 stcb->asoc.scope.ipv4_local_scope = 1; 3228 retried = 1; 3229 goto again_with_private_addresses_allowed; 3230 } else if (retried == 1) { 3231 stcb->asoc.scope.ipv4_local_scope = 0; 3232 } 3233 } 3234#endif 3235out: 3236#ifdef INET 3237 if (sifa) { 3238 if (retried == 1) { 3239 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 3240 if (dest_is_loop == 0 && SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 3241 /* wrong base scope */ 3242 continue; 3243 } 3244 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 3245 struct sctp_ifa *tmp_sifa; 3246 3247#ifdef INET 3248 if ((sctp_ifa->address.sa.sa_family == AF_INET) && 3249 (prison_check_ip4(inp->ip_inp.inp.inp_cred, 3250 &sctp_ifa->address.sin.sin_addr) != 0)) { 3251 continue; 3252 } 3253#endif 3254#ifdef INET6 3255 if ((sctp_ifa->address.sa.sa_family == AF_INET6) && 3256 (prison_check_ip6(inp->ip_inp.inp.inp_cred, 3257 &sctp_ifa->address.sin6.sin6_addr) != 0)) { 3258 continue; 3259 } 3260#endif 3261 if ((sctp_ifa->localifa_flags & SCTP_ADDR_DEFER_USE) && 3262 (non_asoc_addr_ok == 0)) 3263 continue; 3264 tmp_sifa = sctp_is_ifa_addr_acceptable(sctp_ifa, 3265 dest_is_loop, 3266 dest_is_priv, fam); 3267 if (tmp_sifa == NULL) { 3268 continue; 3269 } 3270 if (tmp_sifa == sifa) { 3271 continue; 3272 } 3273 if (stcb) { 3274 if (sctp_is_address_in_scope(tmp_sifa, 3275 &stcb->asoc.scope, 0) == 0) { 3276 continue; 3277 } 3278 if (((non_asoc_addr_ok == 0) && 3279 (sctp_is_addr_restricted(stcb, tmp_sifa))) || 3280 (non_asoc_addr_ok && 3281 (sctp_is_addr_restricted(stcb, tmp_sifa)) && 3282 (!sctp_is_addr_pending(stcb, tmp_sifa)))) { 3283 /* 3284 * It is restricted 3285 * for some reason.. 3286 * probably not yet 3287 * added. 3288 */ 3289 continue; 3290 } 3291 } 3292 if ((tmp_sifa->address.sin.sin_family == AF_INET) && 3293 (IN4_ISPRIVATE_ADDRESS(&(tmp_sifa->address.sin.sin_addr)))) { 3294 sctp_add_local_addr_restricted(stcb, tmp_sifa); 3295 } 3296 } 3297 } 3298 } 3299 atomic_add_int(&sifa->refcount, 1); 3300 } 3301#endif 3302 return (sifa); 3303} 3304 3305 3306 3307/* tcb may be NULL */ 3308struct sctp_ifa * 3309sctp_source_address_selection(struct sctp_inpcb *inp, 3310 struct sctp_tcb *stcb, 3311 sctp_route_t * ro, 3312 struct sctp_nets *net, 3313 int non_asoc_addr_ok, uint32_t vrf_id) 3314{ 3315 struct sctp_ifa *answer; 3316 uint8_t dest_is_priv, dest_is_loop; 3317 sa_family_t fam; 3318 3319#ifdef INET 3320 struct sockaddr_in *to = (struct sockaddr_in *)&ro->ro_dst; 3321 3322#endif 3323#ifdef INET6 3324 struct sockaddr_in6 *to6 = (struct sockaddr_in6 *)&ro->ro_dst; 3325 3326#endif 3327 3328 /** 3329 * Rules: - Find the route if needed, cache if I can. - Look at 3330 * interface address in route, Is it in the bound list. If so we 3331 * have the best source. - If not we must rotate amongst the 3332 * addresses. 3333 * 3334 * Cavets and issues 3335 * 3336 * Do we need to pay attention to scope. We can have a private address 3337 * or a global address we are sourcing or sending to. So if we draw 3338 * it out 3339 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3340 * For V4 3341 * ------------------------------------------ 3342 * source * dest * result 3343 * ----------------------------------------- 3344 * <a> Private * Global * NAT 3345 * ----------------------------------------- 3346 * <b> Private * Private * No problem 3347 * ----------------------------------------- 3348 * <c> Global * Private * Huh, How will this work? 3349 * ----------------------------------------- 3350 * <d> Global * Global * No Problem 3351 *------------------------------------------ 3352 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3353 * For V6 3354 *------------------------------------------ 3355 * source * dest * result 3356 * ----------------------------------------- 3357 * <a> Linklocal * Global * 3358 * ----------------------------------------- 3359 * <b> Linklocal * Linklocal * No problem 3360 * ----------------------------------------- 3361 * <c> Global * Linklocal * Huh, How will this work? 3362 * ----------------------------------------- 3363 * <d> Global * Global * No Problem 3364 *------------------------------------------ 3365 * zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz 3366 * 3367 * And then we add to that what happens if there are multiple addresses 3368 * assigned to an interface. Remember the ifa on a ifn is a linked 3369 * list of addresses. So one interface can have more than one IP 3370 * address. What happens if we have both a private and a global 3371 * address? Do we then use context of destination to sort out which 3372 * one is best? And what about NAT's sending P->G may get you a NAT 3373 * translation, or should you select the G thats on the interface in 3374 * preference. 3375 * 3376 * Decisions: 3377 * 3378 * - count the number of addresses on the interface. 3379 * - if it is one, no problem except case <c>. 3380 * For <a> we will assume a NAT out there. 3381 * - if there are more than one, then we need to worry about scope P 3382 * or G. We should prefer G -> G and P -> P if possible. 3383 * Then as a secondary fall back to mixed types G->P being a last 3384 * ditch one. 3385 * - The above all works for bound all, but bound specific we need to 3386 * use the same concept but instead only consider the bound 3387 * addresses. If the bound set is NOT assigned to the interface then 3388 * we must use rotation amongst the bound addresses.. 3389 */ 3390 if (ro->ro_rt == NULL) { 3391 /* 3392 * Need a route to cache. 3393 */ 3394 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 3395 } 3396 if (ro->ro_rt == NULL) { 3397 return (NULL); 3398 } 3399 fam = ro->ro_dst.sa_family; 3400 dest_is_priv = dest_is_loop = 0; 3401 /* Setup our scopes for the destination */ 3402 switch (fam) { 3403#ifdef INET 3404 case AF_INET: 3405 /* Scope based on outbound address */ 3406 if (IN4_ISLOOPBACK_ADDRESS(&to->sin_addr)) { 3407 dest_is_loop = 1; 3408 if (net != NULL) { 3409 /* mark it as local */ 3410 net->addr_is_local = 1; 3411 } 3412 } else if ((IN4_ISPRIVATE_ADDRESS(&to->sin_addr))) { 3413 dest_is_priv = 1; 3414 } 3415 break; 3416#endif 3417#ifdef INET6 3418 case AF_INET6: 3419 /* Scope based on outbound address */ 3420 if (IN6_IS_ADDR_LOOPBACK(&to6->sin6_addr) || 3421 SCTP_ROUTE_IS_REAL_LOOP(ro)) { 3422 /* 3423 * If the address is a loopback address, which 3424 * consists of "::1" OR "fe80::1%lo0", we are 3425 * loopback scope. But we don't use dest_is_priv 3426 * (link local addresses). 3427 */ 3428 dest_is_loop = 1; 3429 if (net != NULL) { 3430 /* mark it as local */ 3431 net->addr_is_local = 1; 3432 } 3433 } else if (IN6_IS_ADDR_LINKLOCAL(&to6->sin6_addr)) { 3434 dest_is_priv = 1; 3435 } 3436 break; 3437#endif 3438 } 3439 SCTPDBG(SCTP_DEBUG_OUTPUT2, "Select source addr for:"); 3440 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&ro->ro_dst); 3441 SCTP_IPI_ADDR_RLOCK(); 3442 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 3443 /* 3444 * Bound all case 3445 */ 3446 answer = sctp_choose_boundall(inp, stcb, net, ro, vrf_id, 3447 dest_is_priv, dest_is_loop, 3448 non_asoc_addr_ok, fam); 3449 SCTP_IPI_ADDR_RUNLOCK(); 3450 return (answer); 3451 } 3452 /* 3453 * Subset bound case 3454 */ 3455 if (stcb) { 3456 answer = sctp_choose_boundspecific_stcb(inp, stcb, ro, 3457 vrf_id, dest_is_priv, 3458 dest_is_loop, 3459 non_asoc_addr_ok, fam); 3460 } else { 3461 answer = sctp_choose_boundspecific_inp(inp, ro, vrf_id, 3462 non_asoc_addr_ok, 3463 dest_is_priv, 3464 dest_is_loop, fam); 3465 } 3466 SCTP_IPI_ADDR_RUNLOCK(); 3467 return (answer); 3468} 3469 3470static int 3471sctp_find_cmsg(int c_type, void *data, struct mbuf *control, size_t cpsize) 3472{ 3473 struct cmsghdr cmh; 3474 int tlen, at, found; 3475 struct sctp_sndinfo sndinfo; 3476 struct sctp_prinfo prinfo; 3477 struct sctp_authinfo authinfo; 3478 3479 tlen = SCTP_BUF_LEN(control); 3480 at = 0; 3481 found = 0; 3482 /* 3483 * Independent of how many mbufs, find the c_type inside the control 3484 * structure and copy out the data. 3485 */ 3486 while (at < tlen) { 3487 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3488 /* There is not enough room for one more. */ 3489 return (found); 3490 } 3491 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3492 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3493 /* We dont't have a complete CMSG header. */ 3494 return (found); 3495 } 3496 if (((int)cmh.cmsg_len + at) > tlen) { 3497 /* We don't have the complete CMSG. */ 3498 return (found); 3499 } 3500 if ((cmh.cmsg_level == IPPROTO_SCTP) && 3501 ((c_type == cmh.cmsg_type) || 3502 ((c_type == SCTP_SNDRCV) && 3503 ((cmh.cmsg_type == SCTP_SNDINFO) || 3504 (cmh.cmsg_type == SCTP_PRINFO) || 3505 (cmh.cmsg_type == SCTP_AUTHINFO))))) { 3506 if (c_type == cmh.cmsg_type) { 3507 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < cpsize) { 3508 return (found); 3509 } 3510 /* It is exactly what we want. Copy it out. */ 3511 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), cpsize, (caddr_t)data); 3512 return (1); 3513 } else { 3514 struct sctp_sndrcvinfo *sndrcvinfo; 3515 3516 sndrcvinfo = (struct sctp_sndrcvinfo *)data; 3517 if (found == 0) { 3518 if (cpsize < sizeof(struct sctp_sndrcvinfo)) { 3519 return (found); 3520 } 3521 memset(sndrcvinfo, 0, sizeof(struct sctp_sndrcvinfo)); 3522 } 3523 switch (cmh.cmsg_type) { 3524 case SCTP_SNDINFO: 3525 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_sndinfo)) { 3526 return (found); 3527 } 3528 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_sndinfo), (caddr_t)&sndinfo); 3529 sndrcvinfo->sinfo_stream = sndinfo.snd_sid; 3530 sndrcvinfo->sinfo_flags = sndinfo.snd_flags; 3531 sndrcvinfo->sinfo_ppid = sndinfo.snd_ppid; 3532 sndrcvinfo->sinfo_context = sndinfo.snd_context; 3533 sndrcvinfo->sinfo_assoc_id = sndinfo.snd_assoc_id; 3534 break; 3535 case SCTP_PRINFO: 3536 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_prinfo)) { 3537 return (found); 3538 } 3539 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_prinfo), (caddr_t)&prinfo); 3540 if (prinfo.pr_policy != SCTP_PR_SCTP_NONE) { 3541 sndrcvinfo->sinfo_timetolive = prinfo.pr_value; 3542 } else { 3543 sndrcvinfo->sinfo_timetolive = 0; 3544 } 3545 sndrcvinfo->sinfo_flags |= prinfo.pr_policy; 3546 break; 3547 case SCTP_AUTHINFO: 3548 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_authinfo)) { 3549 return (found); 3550 } 3551 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_authinfo), (caddr_t)&authinfo); 3552 sndrcvinfo->sinfo_keynumber_valid = 1; 3553 sndrcvinfo->sinfo_keynumber = authinfo.auth_keynumber; 3554 break; 3555 default: 3556 return (found); 3557 } 3558 found = 1; 3559 } 3560 } 3561 at += CMSG_ALIGN(cmh.cmsg_len); 3562 } 3563 return (found); 3564} 3565 3566static int 3567sctp_process_cmsgs_for_init(struct sctp_tcb *stcb, struct mbuf *control, int *error) 3568{ 3569 struct cmsghdr cmh; 3570 int tlen, at; 3571 struct sctp_initmsg initmsg; 3572 3573#ifdef INET 3574 struct sockaddr_in sin; 3575 3576#endif 3577#ifdef INET6 3578 struct sockaddr_in6 sin6; 3579 3580#endif 3581 3582 tlen = SCTP_BUF_LEN(control); 3583 at = 0; 3584 while (at < tlen) { 3585 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3586 /* There is not enough room for one more. */ 3587 *error = EINVAL; 3588 return (1); 3589 } 3590 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3591 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3592 /* We dont't have a complete CMSG header. */ 3593 *error = EINVAL; 3594 return (1); 3595 } 3596 if (((int)cmh.cmsg_len + at) > tlen) { 3597 /* We don't have the complete CMSG. */ 3598 *error = EINVAL; 3599 return (1); 3600 } 3601 if (cmh.cmsg_level == IPPROTO_SCTP) { 3602 switch (cmh.cmsg_type) { 3603 case SCTP_INIT: 3604 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct sctp_initmsg)) { 3605 *error = EINVAL; 3606 return (1); 3607 } 3608 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct sctp_initmsg), (caddr_t)&initmsg); 3609 if (initmsg.sinit_max_attempts) 3610 stcb->asoc.max_init_times = initmsg.sinit_max_attempts; 3611 if (initmsg.sinit_num_ostreams) 3612 stcb->asoc.pre_open_streams = initmsg.sinit_num_ostreams; 3613 if (initmsg.sinit_max_instreams) 3614 stcb->asoc.max_inbound_streams = initmsg.sinit_max_instreams; 3615 if (initmsg.sinit_max_init_timeo) 3616 stcb->asoc.initial_init_rto_max = initmsg.sinit_max_init_timeo; 3617 if (stcb->asoc.streamoutcnt < stcb->asoc.pre_open_streams) { 3618 struct sctp_stream_out *tmp_str; 3619 unsigned int i; 3620 3621#if defined(SCTP_DETAILED_STR_STATS) 3622 int j; 3623 3624#endif 3625 3626 /* Default is NOT correct */ 3627 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, default:%d pre_open:%d\n", 3628 stcb->asoc.streamoutcnt, stcb->asoc.pre_open_streams); 3629 SCTP_TCB_UNLOCK(stcb); 3630 SCTP_MALLOC(tmp_str, 3631 struct sctp_stream_out *, 3632 (stcb->asoc.pre_open_streams * sizeof(struct sctp_stream_out)), 3633 SCTP_M_STRMO); 3634 SCTP_TCB_LOCK(stcb); 3635 if (tmp_str != NULL) { 3636 SCTP_FREE(stcb->asoc.strmout, SCTP_M_STRMO); 3637 stcb->asoc.strmout = tmp_str; 3638 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt = stcb->asoc.pre_open_streams; 3639 } else { 3640 stcb->asoc.pre_open_streams = stcb->asoc.streamoutcnt; 3641 } 3642 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 3643 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 3644 stcb->asoc.strmout[i].chunks_on_queues = 0; 3645 stcb->asoc.strmout[i].next_sequence_send = 0; 3646#if defined(SCTP_DETAILED_STR_STATS) 3647 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 3648 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 3649 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 3650 } 3651#else 3652 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 3653 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 3654#endif 3655 stcb->asoc.strmout[i].stream_no = i; 3656 stcb->asoc.strmout[i].last_msg_incomplete = 0; 3657 stcb->asoc.strmout[i].state = SCTP_STREAM_OPENING; 3658 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 3659 } 3660 } 3661 break; 3662#ifdef INET 3663 case SCTP_DSTADDRV4: 3664 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3665 *error = EINVAL; 3666 return (1); 3667 } 3668 memset(&sin, 0, sizeof(struct sockaddr_in)); 3669 sin.sin_family = AF_INET; 3670 sin.sin_len = sizeof(struct sockaddr_in); 3671 sin.sin_port = stcb->rport; 3672 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3673 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3674 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3675 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3676 *error = EINVAL; 3677 return (1); 3678 } 3679 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3680 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3681 *error = ENOBUFS; 3682 return (1); 3683 } 3684 break; 3685#endif 3686#ifdef INET6 3687 case SCTP_DSTADDRV6: 3688 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3689 *error = EINVAL; 3690 return (1); 3691 } 3692 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3693 sin6.sin6_family = AF_INET6; 3694 sin6.sin6_len = sizeof(struct sockaddr_in6); 3695 sin6.sin6_port = stcb->rport; 3696 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3697 if (IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr) || 3698 IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 3699 *error = EINVAL; 3700 return (1); 3701 } 3702#ifdef INET 3703 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3704 in6_sin6_2_sin(&sin, &sin6); 3705 if ((sin.sin_addr.s_addr == INADDR_ANY) || 3706 (sin.sin_addr.s_addr == INADDR_BROADCAST) || 3707 IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 3708 *error = EINVAL; 3709 return (1); 3710 } 3711 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin, NULL, 3712 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3713 *error = ENOBUFS; 3714 return (1); 3715 } 3716 } else 3717#endif 3718 if (sctp_add_remote_addr(stcb, (struct sockaddr *)&sin6, NULL, 3719 SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) { 3720 *error = ENOBUFS; 3721 return (1); 3722 } 3723 break; 3724#endif 3725 default: 3726 break; 3727 } 3728 } 3729 at += CMSG_ALIGN(cmh.cmsg_len); 3730 } 3731 return (0); 3732} 3733 3734static struct sctp_tcb * 3735sctp_findassociation_cmsgs(struct sctp_inpcb **inp_p, 3736 uint16_t port, 3737 struct mbuf *control, 3738 struct sctp_nets **net_p, 3739 int *error) 3740{ 3741 struct cmsghdr cmh; 3742 int tlen, at; 3743 struct sctp_tcb *stcb; 3744 struct sockaddr *addr; 3745 3746#ifdef INET 3747 struct sockaddr_in sin; 3748 3749#endif 3750#ifdef INET6 3751 struct sockaddr_in6 sin6; 3752 3753#endif 3754 3755 tlen = SCTP_BUF_LEN(control); 3756 at = 0; 3757 while (at < tlen) { 3758 if ((tlen - at) < (int)CMSG_ALIGN(sizeof(cmh))) { 3759 /* There is not enough room for one more. */ 3760 *error = EINVAL; 3761 return (NULL); 3762 } 3763 m_copydata(control, at, sizeof(cmh), (caddr_t)&cmh); 3764 if (cmh.cmsg_len < CMSG_ALIGN(sizeof(cmh))) { 3765 /* We dont't have a complete CMSG header. */ 3766 *error = EINVAL; 3767 return (NULL); 3768 } 3769 if (((int)cmh.cmsg_len + at) > tlen) { 3770 /* We don't have the complete CMSG. */ 3771 *error = EINVAL; 3772 return (NULL); 3773 } 3774 if (cmh.cmsg_level == IPPROTO_SCTP) { 3775 switch (cmh.cmsg_type) { 3776#ifdef INET 3777 case SCTP_DSTADDRV4: 3778 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in_addr)) { 3779 *error = EINVAL; 3780 return (NULL); 3781 } 3782 memset(&sin, 0, sizeof(struct sockaddr_in)); 3783 sin.sin_family = AF_INET; 3784 sin.sin_len = sizeof(struct sockaddr_in); 3785 sin.sin_port = port; 3786 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in_addr), (caddr_t)&sin.sin_addr); 3787 addr = (struct sockaddr *)&sin; 3788 break; 3789#endif 3790#ifdef INET6 3791 case SCTP_DSTADDRV6: 3792 if ((size_t)(cmh.cmsg_len - CMSG_ALIGN(sizeof(cmh))) < sizeof(struct in6_addr)) { 3793 *error = EINVAL; 3794 return (NULL); 3795 } 3796 memset(&sin6, 0, sizeof(struct sockaddr_in6)); 3797 sin6.sin6_family = AF_INET6; 3798 sin6.sin6_len = sizeof(struct sockaddr_in6); 3799 sin6.sin6_port = port; 3800 m_copydata(control, at + CMSG_ALIGN(sizeof(cmh)), sizeof(struct in6_addr), (caddr_t)&sin6.sin6_addr); 3801#ifdef INET 3802 if (IN6_IS_ADDR_V4MAPPED(&sin6.sin6_addr)) { 3803 in6_sin6_2_sin(&sin, &sin6); 3804 addr = (struct sockaddr *)&sin; 3805 } else 3806#endif 3807 addr = (struct sockaddr *)&sin6; 3808 break; 3809#endif 3810 default: 3811 addr = NULL; 3812 break; 3813 } 3814 if (addr) { 3815 stcb = sctp_findassociation_ep_addr(inp_p, addr, net_p, NULL, NULL); 3816 if (stcb != NULL) { 3817 return (stcb); 3818 } 3819 } 3820 } 3821 at += CMSG_ALIGN(cmh.cmsg_len); 3822 } 3823 return (NULL); 3824} 3825 3826static struct mbuf * 3827sctp_add_cookie(struct mbuf *init, int init_offset, 3828 struct mbuf *initack, int initack_offset, struct sctp_state_cookie *stc_in, uint8_t ** signature) 3829{ 3830 struct mbuf *copy_init, *copy_initack, *m_at, *sig, *mret; 3831 struct sctp_state_cookie *stc; 3832 struct sctp_paramhdr *ph; 3833 uint8_t *foo; 3834 int sig_offset; 3835 uint16_t cookie_sz; 3836 3837 mret = sctp_get_mbuf_for_msg((sizeof(struct sctp_state_cookie) + 3838 sizeof(struct sctp_paramhdr)), 0, 3839 M_NOWAIT, 1, MT_DATA); 3840 if (mret == NULL) { 3841 return (NULL); 3842 } 3843 copy_init = SCTP_M_COPYM(init, init_offset, M_COPYALL, M_NOWAIT); 3844 if (copy_init == NULL) { 3845 sctp_m_freem(mret); 3846 return (NULL); 3847 } 3848#ifdef SCTP_MBUF_LOGGING 3849 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3850 sctp_log_mbc(copy_init, SCTP_MBUF_ICOPY); 3851 } 3852#endif 3853 copy_initack = SCTP_M_COPYM(initack, initack_offset, M_COPYALL, 3854 M_NOWAIT); 3855 if (copy_initack == NULL) { 3856 sctp_m_freem(mret); 3857 sctp_m_freem(copy_init); 3858 return (NULL); 3859 } 3860#ifdef SCTP_MBUF_LOGGING 3861 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 3862 sctp_log_mbc(copy_initack, SCTP_MBUF_ICOPY); 3863 } 3864#endif 3865 /* easy side we just drop it on the end */ 3866 ph = mtod(mret, struct sctp_paramhdr *); 3867 SCTP_BUF_LEN(mret) = sizeof(struct sctp_state_cookie) + 3868 sizeof(struct sctp_paramhdr); 3869 stc = (struct sctp_state_cookie *)((caddr_t)ph + 3870 sizeof(struct sctp_paramhdr)); 3871 ph->param_type = htons(SCTP_STATE_COOKIE); 3872 ph->param_length = 0; /* fill in at the end */ 3873 /* Fill in the stc cookie data */ 3874 memcpy(stc, stc_in, sizeof(struct sctp_state_cookie)); 3875 3876 /* tack the INIT and then the INIT-ACK onto the chain */ 3877 cookie_sz = 0; 3878 for (m_at = mret; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3879 cookie_sz += SCTP_BUF_LEN(m_at); 3880 if (SCTP_BUF_NEXT(m_at) == NULL) { 3881 SCTP_BUF_NEXT(m_at) = copy_init; 3882 break; 3883 } 3884 } 3885 for (m_at = copy_init; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3886 cookie_sz += SCTP_BUF_LEN(m_at); 3887 if (SCTP_BUF_NEXT(m_at) == NULL) { 3888 SCTP_BUF_NEXT(m_at) = copy_initack; 3889 break; 3890 } 3891 } 3892 for (m_at = copy_initack; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 3893 cookie_sz += SCTP_BUF_LEN(m_at); 3894 if (SCTP_BUF_NEXT(m_at) == NULL) { 3895 break; 3896 } 3897 } 3898 sig = sctp_get_mbuf_for_msg(SCTP_SECRET_SIZE, 0, M_NOWAIT, 1, MT_DATA); 3899 if (sig == NULL) { 3900 /* no space, so free the entire chain */ 3901 sctp_m_freem(mret); 3902 return (NULL); 3903 } 3904 SCTP_BUF_LEN(sig) = 0; 3905 SCTP_BUF_NEXT(m_at) = sig; 3906 sig_offset = 0; 3907 foo = (uint8_t *) (mtod(sig, caddr_t)+sig_offset); 3908 memset(foo, 0, SCTP_SIGNATURE_SIZE); 3909 *signature = foo; 3910 SCTP_BUF_LEN(sig) += SCTP_SIGNATURE_SIZE; 3911 cookie_sz += SCTP_SIGNATURE_SIZE; 3912 ph->param_length = htons(cookie_sz); 3913 return (mret); 3914} 3915 3916 3917static uint8_t 3918sctp_get_ect(struct sctp_tcb *stcb) 3919{ 3920 if ((stcb != NULL) && (stcb->asoc.ecn_supported == 1)) { 3921 return (SCTP_ECT0_BIT); 3922 } else { 3923 return (0); 3924 } 3925} 3926 3927#if defined(INET) || defined(INET6) 3928static void 3929sctp_handle_no_route(struct sctp_tcb *stcb, 3930 struct sctp_nets *net, 3931 int so_locked) 3932{ 3933 SCTPDBG(SCTP_DEBUG_OUTPUT1, "dropped packet - no valid source addr\n"); 3934 3935 if (net) { 3936 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Destination was "); 3937 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT1, &net->ro._l_addr.sa); 3938 if (net->dest_state & SCTP_ADDR_CONFIRMED) { 3939 if ((net->dest_state & SCTP_ADDR_REACHABLE) && stcb) { 3940 SCTPDBG(SCTP_DEBUG_OUTPUT1, "no route takes interface %p down\n", (void *)net); 3941 sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_DOWN, 3942 stcb, 0, 3943 (void *)net, 3944 so_locked); 3945 net->dest_state &= ~SCTP_ADDR_REACHABLE; 3946 net->dest_state &= ~SCTP_ADDR_PF; 3947 } 3948 } 3949 if (stcb) { 3950 if (net == stcb->asoc.primary_destination) { 3951 /* need a new primary */ 3952 struct sctp_nets *alt; 3953 3954 alt = sctp_find_alternate_net(stcb, net, 0); 3955 if (alt != net) { 3956 if (stcb->asoc.alternate) { 3957 sctp_free_remote_addr(stcb->asoc.alternate); 3958 } 3959 stcb->asoc.alternate = alt; 3960 atomic_add_int(&stcb->asoc.alternate->ref_count, 1); 3961 if (net->ro._s_addr) { 3962 sctp_free_ifa(net->ro._s_addr); 3963 net->ro._s_addr = NULL; 3964 } 3965 net->src_addr_selected = 0; 3966 } 3967 } 3968 } 3969 } 3970} 3971 3972#endif 3973 3974static int 3975sctp_lowlevel_chunk_output(struct sctp_inpcb *inp, 3976 struct sctp_tcb *stcb, /* may be NULL */ 3977 struct sctp_nets *net, 3978 struct sockaddr *to, 3979 struct mbuf *m, 3980 uint32_t auth_offset, 3981 struct sctp_auth_chunk *auth, 3982 uint16_t auth_keyid, 3983 int nofragment_flag, 3984 int ecn_ok, 3985 int out_of_asoc_ok, 3986 uint16_t src_port, 3987 uint16_t dest_port, 3988 uint32_t v_tag, 3989 uint16_t port, 3990 union sctp_sockstore *over_addr, 3991 uint8_t mflowtype, uint32_t mflowid, 3992#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 3993 int so_locked SCTP_UNUSED 3994#else 3995 int so_locked 3996#endif 3997) 3998/* nofragment_flag to tell if IP_DF should be set (IPv4 only) */ 3999{ 4000 /** 4001 * Given a mbuf chain (via SCTP_BUF_NEXT()) that holds a packet header 4002 * WITH an SCTPHDR but no IP header, endpoint inp and sa structure: 4003 * - fill in the HMAC digest of any AUTH chunk in the packet. 4004 * - calculate and fill in the SCTP checksum. 4005 * - prepend an IP address header. 4006 * - if boundall use INADDR_ANY. 4007 * - if boundspecific do source address selection. 4008 * - set fragmentation option for ipV4. 4009 * - On return from IP output, check/adjust mtu size of output 4010 * interface and smallest_mtu size as well. 4011 */ 4012 /* Will need ifdefs around this */ 4013 struct mbuf *newm; 4014 struct sctphdr *sctphdr; 4015 int packet_length; 4016 int ret; 4017 4018#if defined(INET) || defined(INET6) 4019 uint32_t vrf_id; 4020 4021#endif 4022#if defined(INET) || defined(INET6) 4023 struct mbuf *o_pak; 4024 sctp_route_t *ro = NULL; 4025 struct udphdr *udp = NULL; 4026 4027#endif 4028 uint8_t tos_value; 4029 4030#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4031 struct socket *so = NULL; 4032 4033#endif 4034 4035 if ((net) && (net->dest_state & SCTP_ADDR_OUT_OF_SCOPE)) { 4036 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4037 sctp_m_freem(m); 4038 return (EFAULT); 4039 } 4040#if defined(INET) || defined(INET6) 4041 if (stcb) { 4042 vrf_id = stcb->asoc.vrf_id; 4043 } else { 4044 vrf_id = inp->def_vrf_id; 4045 } 4046#endif 4047 /* fill in the HMAC digest for any AUTH chunk in the packet */ 4048 if ((auth != NULL) && (stcb != NULL)) { 4049 sctp_fill_hmac_digest_m(m, auth_offset, auth, stcb, auth_keyid); 4050 } 4051 if (net) { 4052 tos_value = net->dscp; 4053 } else if (stcb) { 4054 tos_value = stcb->asoc.default_dscp; 4055 } else { 4056 tos_value = inp->sctp_ep.default_dscp; 4057 } 4058 4059 switch (to->sa_family) { 4060#ifdef INET 4061 case AF_INET: 4062 { 4063 struct ip *ip = NULL; 4064 sctp_route_t iproute; 4065 int len; 4066 4067 len = SCTP_MIN_V4_OVERHEAD; 4068 if (port) { 4069 len += sizeof(struct udphdr); 4070 } 4071 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4072 if (newm == NULL) { 4073 sctp_m_freem(m); 4074 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4075 return (ENOMEM); 4076 } 4077 SCTP_ALIGN_TO_END(newm, len); 4078 SCTP_BUF_LEN(newm) = len; 4079 SCTP_BUF_NEXT(newm) = m; 4080 m = newm; 4081 if (net != NULL) { 4082 m->m_pkthdr.flowid = net->flowid; 4083 M_HASHTYPE_SET(m, net->flowtype); 4084 } else { 4085 m->m_pkthdr.flowid = mflowid; 4086 M_HASHTYPE_SET(m, mflowtype); 4087 } 4088 packet_length = sctp_calculate_len(m); 4089 ip = mtod(m, struct ip *); 4090 ip->ip_v = IPVERSION; 4091 ip->ip_hl = (sizeof(struct ip) >> 2); 4092 if (tos_value == 0) { 4093 /* 4094 * This means especially, that it is not set 4095 * at the SCTP layer. So use the value from 4096 * the IP layer. 4097 */ 4098 tos_value = inp->ip_inp.inp.inp_ip_tos; 4099 } 4100 tos_value &= 0xfc; 4101 if (ecn_ok) { 4102 tos_value |= sctp_get_ect(stcb); 4103 } 4104 if ((nofragment_flag) && (port == 0)) { 4105 ip->ip_off = htons(IP_DF); 4106 } else { 4107 ip->ip_off = htons(0); 4108 } 4109 /* FreeBSD has a function for ip_id's */ 4110 ip->ip_id = ip_newid(); 4111 4112 ip->ip_ttl = inp->ip_inp.inp.inp_ip_ttl; 4113 ip->ip_len = htons(packet_length); 4114 ip->ip_tos = tos_value; 4115 if (port) { 4116 ip->ip_p = IPPROTO_UDP; 4117 } else { 4118 ip->ip_p = IPPROTO_SCTP; 4119 } 4120 ip->ip_sum = 0; 4121 if (net == NULL) { 4122 ro = &iproute; 4123 memset(&iproute, 0, sizeof(iproute)); 4124 memcpy(&ro->ro_dst, to, to->sa_len); 4125 } else { 4126 ro = (sctp_route_t *) & net->ro; 4127 } 4128 /* Now the address selection part */ 4129 ip->ip_dst.s_addr = ((struct sockaddr_in *)to)->sin_addr.s_addr; 4130 4131 /* call the routine to select the src address */ 4132 if (net && out_of_asoc_ok == 0) { 4133 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4134 sctp_free_ifa(net->ro._s_addr); 4135 net->ro._s_addr = NULL; 4136 net->src_addr_selected = 0; 4137 if (ro->ro_rt) { 4138 RTFREE(ro->ro_rt); 4139 ro->ro_rt = NULL; 4140 } 4141 } 4142 if (net->src_addr_selected == 0) { 4143 /* Cache the source address */ 4144 net->ro._s_addr = sctp_source_address_selection(inp, stcb, 4145 ro, net, 0, 4146 vrf_id); 4147 net->src_addr_selected = 1; 4148 } 4149 if (net->ro._s_addr == NULL) { 4150 /* No route to host */ 4151 net->src_addr_selected = 0; 4152 sctp_handle_no_route(stcb, net, so_locked); 4153 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4154 sctp_m_freem(m); 4155 return (EHOSTUNREACH); 4156 } 4157 ip->ip_src = net->ro._s_addr->address.sin.sin_addr; 4158 } else { 4159 if (over_addr == NULL) { 4160 struct sctp_ifa *_lsrc; 4161 4162 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4163 net, 4164 out_of_asoc_ok, 4165 vrf_id); 4166 if (_lsrc == NULL) { 4167 sctp_handle_no_route(stcb, net, so_locked); 4168 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4169 sctp_m_freem(m); 4170 return (EHOSTUNREACH); 4171 } 4172 ip->ip_src = _lsrc->address.sin.sin_addr; 4173 sctp_free_ifa(_lsrc); 4174 } else { 4175 ip->ip_src = over_addr->sin.sin_addr; 4176 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 4177 } 4178 } 4179 if (port) { 4180 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4181 sctp_handle_no_route(stcb, net, so_locked); 4182 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4183 sctp_m_freem(m); 4184 return (EHOSTUNREACH); 4185 } 4186 udp = (struct udphdr *)((caddr_t)ip + sizeof(struct ip)); 4187 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4188 udp->uh_dport = port; 4189 udp->uh_ulen = htons(packet_length - sizeof(struct ip)); 4190 if (V_udp_cksum) { 4191 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 4192 } else { 4193 udp->uh_sum = 0; 4194 } 4195 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4196 } else { 4197 sctphdr = (struct sctphdr *)((caddr_t)ip + sizeof(struct ip)); 4198 } 4199 4200 sctphdr->src_port = src_port; 4201 sctphdr->dest_port = dest_port; 4202 sctphdr->v_tag = v_tag; 4203 sctphdr->checksum = 0; 4204 4205 /* 4206 * If source address selection fails and we find no 4207 * route then the ip_output should fail as well with 4208 * a NO_ROUTE_TO_HOST type error. We probably should 4209 * catch that somewhere and abort the association 4210 * right away (assuming this is an INIT being sent). 4211 */ 4212 if (ro->ro_rt == NULL) { 4213 /* 4214 * src addr selection failed to find a route 4215 * (or valid source addr), so we can't get 4216 * there from here (yet)! 4217 */ 4218 sctp_handle_no_route(stcb, net, so_locked); 4219 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4220 sctp_m_freem(m); 4221 return (EHOSTUNREACH); 4222 } 4223 if (ro != &iproute) { 4224 memcpy(&iproute, ro, sizeof(*ro)); 4225 } 4226 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv4 output routine from low level src addr:%x\n", 4227 (uint32_t) (ntohl(ip->ip_src.s_addr))); 4228 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Destination is %x\n", 4229 (uint32_t) (ntohl(ip->ip_dst.s_addr))); 4230 SCTPDBG(SCTP_DEBUG_OUTPUT3, "RTP route is %p through\n", 4231 (void *)ro->ro_rt); 4232 4233 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4234 /* failed to prepend data, give up */ 4235 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4236 sctp_m_freem(m); 4237 return (ENOMEM); 4238 } 4239 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4240 if (port) { 4241#if defined(SCTP_WITH_NO_CSUM) 4242 SCTP_STAT_INCR(sctps_sendnocrc); 4243#else 4244 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip) + sizeof(struct udphdr)); 4245 SCTP_STAT_INCR(sctps_sendswcrc); 4246#endif 4247 if (V_udp_cksum) { 4248 SCTP_ENABLE_UDP_CSUM(o_pak); 4249 } 4250 } else { 4251#if defined(SCTP_WITH_NO_CSUM) 4252 SCTP_STAT_INCR(sctps_sendnocrc); 4253#else 4254 m->m_pkthdr.csum_flags = CSUM_SCTP; 4255 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4256 SCTP_STAT_INCR(sctps_sendhwcrc); 4257#endif 4258 } 4259#ifdef SCTP_PACKET_LOGGING 4260 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4261 sctp_packet_log(o_pak); 4262#endif 4263 /* send it out. table id is taken from stcb */ 4264#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4265 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4266 so = SCTP_INP_SO(inp); 4267 SCTP_SOCKET_UNLOCK(so, 0); 4268 } 4269#endif 4270 SCTP_IP_OUTPUT(ret, o_pak, ro, stcb, vrf_id); 4271#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4272 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4273 atomic_add_int(&stcb->asoc.refcnt, 1); 4274 SCTP_TCB_UNLOCK(stcb); 4275 SCTP_SOCKET_LOCK(so, 0); 4276 SCTP_TCB_LOCK(stcb); 4277 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4278 } 4279#endif 4280 SCTP_STAT_INCR(sctps_sendpackets); 4281 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4282 if (ret) 4283 SCTP_STAT_INCR(sctps_senderrors); 4284 4285 SCTPDBG(SCTP_DEBUG_OUTPUT3, "IP output returns %d\n", ret); 4286 if (net == NULL) { 4287 /* free tempy routes */ 4288 RO_RTFREE(ro); 4289 } else { 4290 /* 4291 * PMTU check versus smallest asoc MTU goes 4292 * here 4293 */ 4294 if ((ro->ro_rt != NULL) && 4295 (net->ro._s_addr)) { 4296 uint32_t mtu; 4297 4298 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4299 if (net->port) { 4300 mtu -= sizeof(struct udphdr); 4301 } 4302 if (mtu && (stcb->asoc.smallest_mtu > mtu)) { 4303 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4304 net->mtu = mtu; 4305 } 4306 } else if (ro->ro_rt == NULL) { 4307 /* route was freed */ 4308 if (net->ro._s_addr && 4309 net->src_addr_selected) { 4310 sctp_free_ifa(net->ro._s_addr); 4311 net->ro._s_addr = NULL; 4312 } 4313 net->src_addr_selected = 0; 4314 } 4315 } 4316 return (ret); 4317 } 4318#endif 4319#ifdef INET6 4320 case AF_INET6: 4321 { 4322 uint32_t flowlabel, flowinfo; 4323 struct ip6_hdr *ip6h; 4324 struct route_in6 ip6route; 4325 struct ifnet *ifp; 4326 struct sockaddr_in6 *sin6, tmp, *lsa6, lsa6_tmp; 4327 int prev_scope = 0; 4328 struct sockaddr_in6 lsa6_storage; 4329 int error; 4330 u_short prev_port = 0; 4331 int len; 4332 4333 if (net) { 4334 flowlabel = net->flowlabel; 4335 } else if (stcb) { 4336 flowlabel = stcb->asoc.default_flowlabel; 4337 } else { 4338 flowlabel = inp->sctp_ep.default_flowlabel; 4339 } 4340 if (flowlabel == 0) { 4341 /* 4342 * This means especially, that it is not set 4343 * at the SCTP layer. So use the value from 4344 * the IP layer. 4345 */ 4346 flowlabel = ntohl(((struct in6pcb *)inp)->in6p_flowinfo); 4347 } 4348 flowlabel &= 0x000fffff; 4349 len = SCTP_MIN_OVERHEAD; 4350 if (port) { 4351 len += sizeof(struct udphdr); 4352 } 4353 newm = sctp_get_mbuf_for_msg(len, 1, M_NOWAIT, 1, MT_DATA); 4354 if (newm == NULL) { 4355 sctp_m_freem(m); 4356 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4357 return (ENOMEM); 4358 } 4359 SCTP_ALIGN_TO_END(newm, len); 4360 SCTP_BUF_LEN(newm) = len; 4361 SCTP_BUF_NEXT(newm) = m; 4362 m = newm; 4363 if (net != NULL) { 4364 m->m_pkthdr.flowid = net->flowid; 4365 M_HASHTYPE_SET(m, net->flowtype); 4366 } else { 4367 m->m_pkthdr.flowid = mflowid; 4368 M_HASHTYPE_SET(m, mflowtype); 4369 } 4370 packet_length = sctp_calculate_len(m); 4371 4372 ip6h = mtod(m, struct ip6_hdr *); 4373 /* protect *sin6 from overwrite */ 4374 sin6 = (struct sockaddr_in6 *)to; 4375 tmp = *sin6; 4376 sin6 = &tmp; 4377 4378 /* KAME hack: embed scopeid */ 4379 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4380 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4381 return (EINVAL); 4382 } 4383 if (net == NULL) { 4384 memset(&ip6route, 0, sizeof(ip6route)); 4385 ro = (sctp_route_t *) & ip6route; 4386 memcpy(&ro->ro_dst, sin6, sin6->sin6_len); 4387 } else { 4388 ro = (sctp_route_t *) & net->ro; 4389 } 4390 /* 4391 * We assume here that inp_flow is in host byte 4392 * order within the TCB! 4393 */ 4394 if (tos_value == 0) { 4395 /* 4396 * This means especially, that it is not set 4397 * at the SCTP layer. So use the value from 4398 * the IP layer. 4399 */ 4400 tos_value = (ntohl(((struct in6pcb *)inp)->in6p_flowinfo) >> 20) & 0xff; 4401 } 4402 tos_value &= 0xfc; 4403 if (ecn_ok) { 4404 tos_value |= sctp_get_ect(stcb); 4405 } 4406 flowinfo = 0x06; 4407 flowinfo <<= 8; 4408 flowinfo |= tos_value; 4409 flowinfo <<= 20; 4410 flowinfo |= flowlabel; 4411 ip6h->ip6_flow = htonl(flowinfo); 4412 if (port) { 4413 ip6h->ip6_nxt = IPPROTO_UDP; 4414 } else { 4415 ip6h->ip6_nxt = IPPROTO_SCTP; 4416 } 4417 ip6h->ip6_plen = (packet_length - sizeof(struct ip6_hdr)); 4418 ip6h->ip6_dst = sin6->sin6_addr; 4419 4420 /* 4421 * Add SRC address selection here: we can only reuse 4422 * to a limited degree the kame src-addr-sel, since 4423 * we can try their selection but it may not be 4424 * bound. 4425 */ 4426 bzero(&lsa6_tmp, sizeof(lsa6_tmp)); 4427 lsa6_tmp.sin6_family = AF_INET6; 4428 lsa6_tmp.sin6_len = sizeof(lsa6_tmp); 4429 lsa6 = &lsa6_tmp; 4430 if (net && out_of_asoc_ok == 0) { 4431 if (net->ro._s_addr && (net->ro._s_addr->localifa_flags & (SCTP_BEING_DELETED | SCTP_ADDR_IFA_UNUSEABLE))) { 4432 sctp_free_ifa(net->ro._s_addr); 4433 net->ro._s_addr = NULL; 4434 net->src_addr_selected = 0; 4435 if (ro->ro_rt) { 4436 RTFREE(ro->ro_rt); 4437 ro->ro_rt = NULL; 4438 } 4439 } 4440 if (net->src_addr_selected == 0) { 4441 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4442 /* KAME hack: embed scopeid */ 4443 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4444 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4445 return (EINVAL); 4446 } 4447 /* Cache the source address */ 4448 net->ro._s_addr = sctp_source_address_selection(inp, 4449 stcb, 4450 ro, 4451 net, 4452 0, 4453 vrf_id); 4454 (void)sa6_recoverscope(sin6); 4455 net->src_addr_selected = 1; 4456 } 4457 if (net->ro._s_addr == NULL) { 4458 SCTPDBG(SCTP_DEBUG_OUTPUT3, "V6:No route to host\n"); 4459 net->src_addr_selected = 0; 4460 sctp_handle_no_route(stcb, net, so_locked); 4461 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4462 sctp_m_freem(m); 4463 return (EHOSTUNREACH); 4464 } 4465 lsa6->sin6_addr = net->ro._s_addr->address.sin6.sin6_addr; 4466 } else { 4467 sin6 = (struct sockaddr_in6 *)&ro->ro_dst; 4468 /* KAME hack: embed scopeid */ 4469 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 4470 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 4471 return (EINVAL); 4472 } 4473 if (over_addr == NULL) { 4474 struct sctp_ifa *_lsrc; 4475 4476 _lsrc = sctp_source_address_selection(inp, stcb, ro, 4477 net, 4478 out_of_asoc_ok, 4479 vrf_id); 4480 if (_lsrc == NULL) { 4481 sctp_handle_no_route(stcb, net, so_locked); 4482 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4483 sctp_m_freem(m); 4484 return (EHOSTUNREACH); 4485 } 4486 lsa6->sin6_addr = _lsrc->address.sin6.sin6_addr; 4487 sctp_free_ifa(_lsrc); 4488 } else { 4489 lsa6->sin6_addr = over_addr->sin6.sin6_addr; 4490 SCTP_RTALLOC(ro, vrf_id, inp->fibnum); 4491 } 4492 (void)sa6_recoverscope(sin6); 4493 } 4494 lsa6->sin6_port = inp->sctp_lport; 4495 4496 if (ro->ro_rt == NULL) { 4497 /* 4498 * src addr selection failed to find a route 4499 * (or valid source addr), so we can't get 4500 * there from here! 4501 */ 4502 sctp_handle_no_route(stcb, net, so_locked); 4503 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4504 sctp_m_freem(m); 4505 return (EHOSTUNREACH); 4506 } 4507 /* 4508 * XXX: sa6 may not have a valid sin6_scope_id in 4509 * the non-SCOPEDROUTING case. 4510 */ 4511 bzero(&lsa6_storage, sizeof(lsa6_storage)); 4512 lsa6_storage.sin6_family = AF_INET6; 4513 lsa6_storage.sin6_len = sizeof(lsa6_storage); 4514 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4515 if ((error = sa6_recoverscope(&lsa6_storage)) != 0) { 4516 SCTPDBG(SCTP_DEBUG_OUTPUT3, "recover scope fails error %d\n", error); 4517 sctp_m_freem(m); 4518 return (error); 4519 } 4520 /* XXX */ 4521 lsa6_storage.sin6_addr = lsa6->sin6_addr; 4522 lsa6_storage.sin6_port = inp->sctp_lport; 4523 lsa6 = &lsa6_storage; 4524 ip6h->ip6_src = lsa6->sin6_addr; 4525 4526 if (port) { 4527 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 4528 sctp_handle_no_route(stcb, net, so_locked); 4529 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EHOSTUNREACH); 4530 sctp_m_freem(m); 4531 return (EHOSTUNREACH); 4532 } 4533 udp = (struct udphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4534 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4535 udp->uh_dport = port; 4536 udp->uh_ulen = htons(packet_length - sizeof(struct ip6_hdr)); 4537 udp->uh_sum = 0; 4538 sctphdr = (struct sctphdr *)((caddr_t)udp + sizeof(struct udphdr)); 4539 } else { 4540 sctphdr = (struct sctphdr *)((caddr_t)ip6h + sizeof(struct ip6_hdr)); 4541 } 4542 4543 sctphdr->src_port = src_port; 4544 sctphdr->dest_port = dest_port; 4545 sctphdr->v_tag = v_tag; 4546 sctphdr->checksum = 0; 4547 4548 /* 4549 * We set the hop limit now since there is a good 4550 * chance that our ro pointer is now filled 4551 */ 4552 ip6h->ip6_hlim = SCTP_GET_HLIM(inp, ro); 4553 ifp = SCTP_GET_IFN_VOID_FROM_ROUTE(ro); 4554 4555#ifdef SCTP_DEBUG 4556 /* Copy to be sure something bad is not happening */ 4557 sin6->sin6_addr = ip6h->ip6_dst; 4558 lsa6->sin6_addr = ip6h->ip6_src; 4559#endif 4560 4561 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Calling ipv6 output routine from low level\n"); 4562 SCTPDBG(SCTP_DEBUG_OUTPUT3, "src: "); 4563 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)lsa6); 4564 SCTPDBG(SCTP_DEBUG_OUTPUT3, "dst: "); 4565 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT3, (struct sockaddr *)sin6); 4566 if (net) { 4567 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4568 /* 4569 * preserve the port and scope for link 4570 * local send 4571 */ 4572 prev_scope = sin6->sin6_scope_id; 4573 prev_port = sin6->sin6_port; 4574 } 4575 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 4576 /* failed to prepend data, give up */ 4577 sctp_m_freem(m); 4578 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 4579 return (ENOMEM); 4580 } 4581 SCTP_ATTACH_CHAIN(o_pak, m, packet_length); 4582 if (port) { 4583#if defined(SCTP_WITH_NO_CSUM) 4584 SCTP_STAT_INCR(sctps_sendnocrc); 4585#else 4586 sctphdr->checksum = sctp_calculate_cksum(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 4587 SCTP_STAT_INCR(sctps_sendswcrc); 4588#endif 4589 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), packet_length - sizeof(struct ip6_hdr))) == 0) { 4590 udp->uh_sum = 0xffff; 4591 } 4592 } else { 4593#if defined(SCTP_WITH_NO_CSUM) 4594 SCTP_STAT_INCR(sctps_sendnocrc); 4595#else 4596 m->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 4597 m->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 4598 SCTP_STAT_INCR(sctps_sendhwcrc); 4599#endif 4600 } 4601 /* send it out. table id is taken from stcb */ 4602#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4603 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4604 so = SCTP_INP_SO(inp); 4605 SCTP_SOCKET_UNLOCK(so, 0); 4606 } 4607#endif 4608#ifdef SCTP_PACKET_LOGGING 4609 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) 4610 sctp_packet_log(o_pak); 4611#endif 4612 SCTP_IP6_OUTPUT(ret, o_pak, (struct route_in6 *)ro, &ifp, stcb, vrf_id); 4613#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING) 4614 if ((SCTP_BASE_SYSCTL(sctp_output_unlocked)) && (so_locked)) { 4615 atomic_add_int(&stcb->asoc.refcnt, 1); 4616 SCTP_TCB_UNLOCK(stcb); 4617 SCTP_SOCKET_LOCK(so, 0); 4618 SCTP_TCB_LOCK(stcb); 4619 atomic_subtract_int(&stcb->asoc.refcnt, 1); 4620 } 4621#endif 4622 if (net) { 4623 /* for link local this must be done */ 4624 sin6->sin6_scope_id = prev_scope; 4625 sin6->sin6_port = prev_port; 4626 } 4627 SCTPDBG(SCTP_DEBUG_OUTPUT3, "return from send is %d\n", ret); 4628 SCTP_STAT_INCR(sctps_sendpackets); 4629 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 4630 if (ret) { 4631 SCTP_STAT_INCR(sctps_senderrors); 4632 } 4633 if (net == NULL) { 4634 /* Now if we had a temp route free it */ 4635 RO_RTFREE(ro); 4636 } else { 4637 /* 4638 * PMTU check versus smallest asoc MTU goes 4639 * here 4640 */ 4641 if (ro->ro_rt == NULL) { 4642 /* Route was freed */ 4643 if (net->ro._s_addr && 4644 net->src_addr_selected) { 4645 sctp_free_ifa(net->ro._s_addr); 4646 net->ro._s_addr = NULL; 4647 } 4648 net->src_addr_selected = 0; 4649 } 4650 if ((ro->ro_rt != NULL) && 4651 (net->ro._s_addr)) { 4652 uint32_t mtu; 4653 4654 mtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, ro->ro_rt); 4655 if (mtu && 4656 (stcb->asoc.smallest_mtu > mtu)) { 4657 sctp_mtu_size_reset(inp, &stcb->asoc, mtu); 4658 net->mtu = mtu; 4659 if (net->port) { 4660 net->mtu -= sizeof(struct udphdr); 4661 } 4662 } 4663 } else if (ifp) { 4664 if (ND_IFINFO(ifp)->linkmtu && 4665 (stcb->asoc.smallest_mtu > ND_IFINFO(ifp)->linkmtu)) { 4666 sctp_mtu_size_reset(inp, 4667 &stcb->asoc, 4668 ND_IFINFO(ifp)->linkmtu); 4669 } 4670 } 4671 } 4672 return (ret); 4673 } 4674#endif 4675 default: 4676 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 4677 ((struct sockaddr *)to)->sa_family); 4678 sctp_m_freem(m); 4679 SCTP_LTRACE_ERR_RET_PKT(m, inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 4680 return (EFAULT); 4681 } 4682} 4683 4684 4685void 4686sctp_send_initiate(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int so_locked 4687#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 4688 SCTP_UNUSED 4689#endif 4690) 4691{ 4692 struct mbuf *m, *m_last; 4693 struct sctp_nets *net; 4694 struct sctp_init_chunk *init; 4695 struct sctp_supported_addr_param *sup_addr; 4696 struct sctp_adaptation_layer_indication *ali; 4697 struct sctp_supported_chunk_types_param *pr_supported; 4698 struct sctp_paramhdr *ph; 4699 int cnt_inits_to = 0; 4700 int ret; 4701 uint16_t num_ext, chunk_len, padding_len, parameter_len; 4702 4703 /* INIT's always go to the primary (and usually ONLY address) */ 4704 net = stcb->asoc.primary_destination; 4705 if (net == NULL) { 4706 net = TAILQ_FIRST(&stcb->asoc.nets); 4707 if (net == NULL) { 4708 /* TSNH */ 4709 return; 4710 } 4711 /* we confirm any address we send an INIT to */ 4712 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4713 (void)sctp_set_primary_addr(stcb, NULL, net); 4714 } else { 4715 /* we confirm any address we send an INIT to */ 4716 net->dest_state &= ~SCTP_ADDR_UNCONFIRMED; 4717 } 4718 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT\n"); 4719#ifdef INET6 4720 if (net->ro._l_addr.sa.sa_family == AF_INET6) { 4721 /* 4722 * special hook, if we are sending to link local it will not 4723 * show up in our private address count. 4724 */ 4725 if (IN6_IS_ADDR_LINKLOCAL(&net->ro._l_addr.sin6.sin6_addr)) 4726 cnt_inits_to = 1; 4727 } 4728#endif 4729 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 4730 /* This case should not happen */ 4731 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - failed timer?\n"); 4732 return; 4733 } 4734 /* start the INIT timer */ 4735 sctp_timer_start(SCTP_TIMER_TYPE_INIT, inp, stcb, net); 4736 4737 m = sctp_get_mbuf_for_msg(MCLBYTES, 1, M_NOWAIT, 1, MT_DATA); 4738 if (m == NULL) { 4739 /* No memory, INIT timer will re-attempt. */ 4740 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - mbuf?\n"); 4741 return; 4742 } 4743 chunk_len = (uint16_t) sizeof(struct sctp_init_chunk); 4744 padding_len = 0; 4745 /* Now lets put the chunk header in place */ 4746 init = mtod(m, struct sctp_init_chunk *); 4747 /* now the chunk header */ 4748 init->ch.chunk_type = SCTP_INITIATION; 4749 init->ch.chunk_flags = 0; 4750 /* fill in later from mbuf we build */ 4751 init->ch.chunk_length = 0; 4752 /* place in my tag */ 4753 init->init.initiate_tag = htonl(stcb->asoc.my_vtag); 4754 /* set up some of the credits. */ 4755 init->init.a_rwnd = htonl(max(inp->sctp_socket ? SCTP_SB_LIMIT_RCV(inp->sctp_socket) : 0, 4756 SCTP_MINIMAL_RWND)); 4757 init->init.num_outbound_streams = htons(stcb->asoc.pre_open_streams); 4758 init->init.num_inbound_streams = htons(stcb->asoc.max_inbound_streams); 4759 init->init.initial_tsn = htonl(stcb->asoc.init_seq_number); 4760 4761 /* Adaptation layer indication parameter */ 4762 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 4763 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 4764 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 4765 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 4766 ali->ph.param_length = htons(parameter_len); 4767 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 4768 chunk_len += parameter_len; 4769 } 4770 /* ECN parameter */ 4771 if (stcb->asoc.ecn_supported == 1) { 4772 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4773 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4774 ph->param_type = htons(SCTP_ECN_CAPABLE); 4775 ph->param_length = htons(parameter_len); 4776 chunk_len += parameter_len; 4777 } 4778 /* PR-SCTP supported parameter */ 4779 if (stcb->asoc.prsctp_supported == 1) { 4780 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4781 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4782 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 4783 ph->param_length = htons(parameter_len); 4784 chunk_len += parameter_len; 4785 } 4786 /* Add NAT friendly parameter. */ 4787 if (SCTP_BASE_SYSCTL(sctp_inits_include_nat_friendly)) { 4788 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4789 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 4790 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 4791 ph->param_length = htons(parameter_len); 4792 chunk_len += parameter_len; 4793 } 4794 /* And now tell the peer which extensions we support */ 4795 num_ext = 0; 4796 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 4797 if (stcb->asoc.prsctp_supported == 1) { 4798 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 4799 } 4800 if (stcb->asoc.auth_supported == 1) { 4801 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 4802 } 4803 if (stcb->asoc.asconf_supported == 1) { 4804 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 4805 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 4806 } 4807 if (stcb->asoc.reconfig_supported == 1) { 4808 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 4809 } 4810 if (stcb->asoc.nrsack_supported == 1) { 4811 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 4812 } 4813 if (stcb->asoc.pktdrop_supported == 1) { 4814 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 4815 } 4816 if (num_ext > 0) { 4817 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 4818 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 4819 pr_supported->ph.param_length = htons(parameter_len); 4820 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4821 chunk_len += parameter_len; 4822 } 4823 /* add authentication parameters */ 4824 if (stcb->asoc.auth_supported) { 4825 /* attach RANDOM parameter, if available */ 4826 if (stcb->asoc.authinfo.random != NULL) { 4827 struct sctp_auth_random *randp; 4828 4829 if (padding_len > 0) { 4830 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4831 chunk_len += padding_len; 4832 padding_len = 0; 4833 } 4834 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 4835 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + stcb->asoc.authinfo.random_len; 4836 /* random key already contains the header */ 4837 memcpy(randp, stcb->asoc.authinfo.random->key, parameter_len); 4838 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4839 chunk_len += parameter_len; 4840 } 4841 /* add HMAC_ALGO parameter */ 4842 if (stcb->asoc.local_hmacs != NULL) { 4843 struct sctp_auth_hmac_algo *hmacs; 4844 4845 if (padding_len > 0) { 4846 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4847 chunk_len += padding_len; 4848 padding_len = 0; 4849 } 4850 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 4851 parameter_len = (uint16_t) (sizeof(struct sctp_auth_hmac_algo) + 4852 stcb->asoc.local_hmacs->num_algo * sizeof(uint16_t)); 4853 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 4854 hmacs->ph.param_length = htons(parameter_len); 4855 sctp_serialize_hmaclist(stcb->asoc.local_hmacs, (uint8_t *) hmacs->hmac_ids); 4856 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4857 chunk_len += parameter_len; 4858 } 4859 /* add CHUNKS parameter */ 4860 if (stcb->asoc.local_auth_chunks != NULL) { 4861 struct sctp_auth_chunk_list *chunks; 4862 4863 if (padding_len > 0) { 4864 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4865 chunk_len += padding_len; 4866 padding_len = 0; 4867 } 4868 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 4869 parameter_len = (uint16_t) (sizeof(struct sctp_auth_chunk_list) + 4870 sctp_auth_get_chklist_size(stcb->asoc.local_auth_chunks)); 4871 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 4872 chunks->ph.param_length = htons(parameter_len); 4873 sctp_serialize_auth_chunks(stcb->asoc.local_auth_chunks, chunks->chunk_types); 4874 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 4875 chunk_len += parameter_len; 4876 } 4877 } 4878 /* now any cookie time extensions */ 4879 if (stcb->asoc.cookie_preserve_req) { 4880 struct sctp_cookie_perserve_param *cookie_preserve; 4881 4882 if (padding_len > 0) { 4883 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4884 chunk_len += padding_len; 4885 padding_len = 0; 4886 } 4887 parameter_len = (uint16_t) sizeof(struct sctp_cookie_perserve_param); 4888 cookie_preserve = (struct sctp_cookie_perserve_param *)(mtod(m, caddr_t)+chunk_len); 4889 cookie_preserve->ph.param_type = htons(SCTP_COOKIE_PRESERVE); 4890 cookie_preserve->ph.param_length = htons(parameter_len); 4891 cookie_preserve->time = htonl(stcb->asoc.cookie_preserve_req); 4892 stcb->asoc.cookie_preserve_req = 0; 4893 chunk_len += parameter_len; 4894 } 4895 if (stcb->asoc.scope.ipv4_addr_legal || stcb->asoc.scope.ipv6_addr_legal) { 4896 uint8_t i; 4897 4898 if (padding_len > 0) { 4899 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 4900 chunk_len += padding_len; 4901 padding_len = 0; 4902 } 4903 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 4904 if (stcb->asoc.scope.ipv4_addr_legal) { 4905 parameter_len += (uint16_t) sizeof(uint16_t); 4906 } 4907 if (stcb->asoc.scope.ipv6_addr_legal) { 4908 parameter_len += (uint16_t) sizeof(uint16_t); 4909 } 4910 sup_addr = (struct sctp_supported_addr_param *)(mtod(m, caddr_t)+chunk_len); 4911 sup_addr->ph.param_type = htons(SCTP_SUPPORTED_ADDRTYPE); 4912 sup_addr->ph.param_length = htons(parameter_len); 4913 i = 0; 4914 if (stcb->asoc.scope.ipv4_addr_legal) { 4915 sup_addr->addr_type[i++] = htons(SCTP_IPV4_ADDRESS); 4916 } 4917 if (stcb->asoc.scope.ipv6_addr_legal) { 4918 sup_addr->addr_type[i++] = htons(SCTP_IPV6_ADDRESS); 4919 } 4920 padding_len = 4 - 2 * i; 4921 chunk_len += parameter_len; 4922 } 4923 SCTP_BUF_LEN(m) = chunk_len; 4924 /* now the addresses */ 4925 /* 4926 * To optimize this we could put the scoping stuff into a structure 4927 * and remove the individual uint8's from the assoc structure. Then 4928 * we could just sifa in the address within the stcb. But for now 4929 * this is a quick hack to get the address stuff teased apart. 4930 */ 4931 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &stcb->asoc.scope, 4932 m, cnt_inits_to, 4933 &padding_len, &chunk_len); 4934 4935 init->ch.chunk_length = htons(chunk_len); 4936 if (padding_len > 0) { 4937 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 4938 sctp_m_freem(m); 4939 return; 4940 } 4941 } 4942 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Sending INIT - calls lowlevel_output\n"); 4943 ret = sctp_lowlevel_chunk_output(inp, stcb, net, 4944 (struct sockaddr *)&net->ro._l_addr, 4945 m, 0, NULL, 0, 0, 0, 0, 4946 inp->sctp_lport, stcb->rport, htonl(0), 4947 net->port, NULL, 4948 0, 0, 4949 so_locked); 4950 SCTPDBG(SCTP_DEBUG_OUTPUT4, "lowlevel_output - %d\n", ret); 4951 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 4952 (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); 4953} 4954 4955struct mbuf * 4956sctp_arethere_unrecognized_parameters(struct mbuf *in_initpkt, 4957 int param_offset, int *abort_processing, struct sctp_chunkhdr *cp, int *nat_friendly) 4958{ 4959 /* 4960 * Given a mbuf containing an INIT or INIT-ACK with the param_offset 4961 * being equal to the beginning of the params i.e. (iphlen + 4962 * sizeof(struct sctp_init_msg) parse through the parameters to the 4963 * end of the mbuf verifying that all parameters are known. 4964 * 4965 * For unknown parameters build and return a mbuf with 4966 * UNRECOGNIZED_PARAMETER errors. If the flags indicate to stop 4967 * processing this chunk stop, and set *abort_processing to 1. 4968 * 4969 * By having param_offset be pre-set to where parameters begin it is 4970 * hoped that this routine may be reused in the future by new 4971 * features. 4972 */ 4973 struct sctp_paramhdr *phdr, params; 4974 4975 struct mbuf *mat, *op_err; 4976 char tempbuf[SCTP_PARAM_BUFFER_SIZE]; 4977 int at, limit, pad_needed; 4978 uint16_t ptype, plen, padded_size; 4979 int err_at; 4980 4981 *abort_processing = 0; 4982 mat = in_initpkt; 4983 err_at = 0; 4984 limit = ntohs(cp->chunk_length) - sizeof(struct sctp_init_chunk); 4985 at = param_offset; 4986 op_err = NULL; 4987 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Check for unrecognized param's\n"); 4988 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 4989 while ((phdr != NULL) && ((size_t)limit >= sizeof(struct sctp_paramhdr))) { 4990 ptype = ntohs(phdr->param_type); 4991 plen = ntohs(phdr->param_length); 4992 if ((plen > limit) || (plen < sizeof(struct sctp_paramhdr))) { 4993 /* wacked parameter */ 4994 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error %d\n", plen); 4995 goto invalid_size; 4996 } 4997 limit -= SCTP_SIZE32(plen); 4998 /*- 4999 * All parameters for all chunks that we know/understand are 5000 * listed here. We process them other places and make 5001 * appropriate stop actions per the upper bits. However this 5002 * is the generic routine processor's can call to get back 5003 * an operr.. to either incorporate (init-ack) or send. 5004 */ 5005 padded_size = SCTP_SIZE32(plen); 5006 switch (ptype) { 5007 /* Param's with variable size */ 5008 case SCTP_HEARTBEAT_INFO: 5009 case SCTP_STATE_COOKIE: 5010 case SCTP_UNRECOG_PARAM: 5011 case SCTP_ERROR_CAUSE_IND: 5012 /* ok skip fwd */ 5013 at += padded_size; 5014 break; 5015 /* Param's with variable size within a range */ 5016 case SCTP_CHUNK_LIST: 5017 case SCTP_SUPPORTED_CHUNK_EXT: 5018 if (padded_size > (sizeof(struct sctp_supported_chunk_types_param) + (sizeof(uint8_t) * SCTP_MAX_SUPPORTED_EXT))) { 5019 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error chklist %d\n", plen); 5020 goto invalid_size; 5021 } 5022 at += padded_size; 5023 break; 5024 case SCTP_SUPPORTED_ADDRTYPE: 5025 if (padded_size > SCTP_MAX_ADDR_PARAMS_SIZE) { 5026 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error supaddrtype %d\n", plen); 5027 goto invalid_size; 5028 } 5029 at += padded_size; 5030 break; 5031 case SCTP_RANDOM: 5032 if (padded_size > (sizeof(struct sctp_auth_random) + SCTP_RANDOM_MAX_SIZE)) { 5033 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error random %d\n", plen); 5034 goto invalid_size; 5035 } 5036 at += padded_size; 5037 break; 5038 case SCTP_SET_PRIM_ADDR: 5039 case SCTP_DEL_IP_ADDRESS: 5040 case SCTP_ADD_IP_ADDRESS: 5041 if ((padded_size != sizeof(struct sctp_asconf_addrv4_param)) && 5042 (padded_size != sizeof(struct sctp_asconf_addr_param))) { 5043 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error setprim %d\n", plen); 5044 goto invalid_size; 5045 } 5046 at += padded_size; 5047 break; 5048 /* Param's with a fixed size */ 5049 case SCTP_IPV4_ADDRESS: 5050 if (padded_size != sizeof(struct sctp_ipv4addr_param)) { 5051 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv4 addr %d\n", plen); 5052 goto invalid_size; 5053 } 5054 at += padded_size; 5055 break; 5056 case SCTP_IPV6_ADDRESS: 5057 if (padded_size != sizeof(struct sctp_ipv6addr_param)) { 5058 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ipv6 addr %d\n", plen); 5059 goto invalid_size; 5060 } 5061 at += padded_size; 5062 break; 5063 case SCTP_COOKIE_PRESERVE: 5064 if (padded_size != sizeof(struct sctp_cookie_perserve_param)) { 5065 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error cookie-preserve %d\n", plen); 5066 goto invalid_size; 5067 } 5068 at += padded_size; 5069 break; 5070 case SCTP_HAS_NAT_SUPPORT: 5071 *nat_friendly = 1; 5072 /* fall through */ 5073 case SCTP_PRSCTP_SUPPORTED: 5074 if (padded_size != sizeof(struct sctp_paramhdr)) { 5075 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error prsctp/nat support %d\n", plen); 5076 goto invalid_size; 5077 } 5078 at += padded_size; 5079 break; 5080 case SCTP_ECN_CAPABLE: 5081 if (padded_size != sizeof(struct sctp_paramhdr)) { 5082 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error ecn %d\n", plen); 5083 goto invalid_size; 5084 } 5085 at += padded_size; 5086 break; 5087 case SCTP_ULP_ADAPTATION: 5088 if (padded_size != sizeof(struct sctp_adaptation_layer_indication)) { 5089 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error adapatation %d\n", plen); 5090 goto invalid_size; 5091 } 5092 at += padded_size; 5093 break; 5094 case SCTP_SUCCESS_REPORT: 5095 if (padded_size != sizeof(struct sctp_asconf_paramhdr)) { 5096 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Invalid size - error success %d\n", plen); 5097 goto invalid_size; 5098 } 5099 at += padded_size; 5100 break; 5101 case SCTP_HOSTNAME_ADDRESS: 5102 { 5103 /* We can NOT handle HOST NAME addresses!! */ 5104 int l_len; 5105 5106 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Can't handle hostname addresses.. abort processing\n"); 5107 *abort_processing = 1; 5108 if (op_err == NULL) { 5109 /* Ok need to try to get a mbuf */ 5110#ifdef INET6 5111 l_len = SCTP_MIN_OVERHEAD; 5112#else 5113 l_len = SCTP_MIN_V4_OVERHEAD; 5114#endif 5115 l_len += sizeof(struct sctp_chunkhdr); 5116 l_len += plen; 5117 l_len += sizeof(struct sctp_paramhdr); 5118 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5119 if (op_err) { 5120 SCTP_BUF_LEN(op_err) = 0; 5121 /* 5122 * pre-reserve space for ip 5123 * and sctp header and 5124 * chunk hdr 5125 */ 5126#ifdef INET6 5127 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5128#else 5129 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5130#endif 5131 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5132 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5133 } 5134 } 5135 if (op_err) { 5136 /* If we have space */ 5137 struct sctp_paramhdr s; 5138 5139 if (err_at % 4) { 5140 uint32_t cpthis = 0; 5141 5142 pad_needed = 4 - (err_at % 4); 5143 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5144 err_at += pad_needed; 5145 } 5146 s.param_type = htons(SCTP_CAUSE_UNRESOLVABLE_ADDR); 5147 s.param_length = htons(sizeof(s) + plen); 5148 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5149 err_at += sizeof(s); 5150 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5151 if (phdr == NULL) { 5152 sctp_m_freem(op_err); 5153 /* 5154 * we are out of memory but 5155 * we still need to have a 5156 * look at what to do (the 5157 * system is in trouble 5158 * though). 5159 */ 5160 return (NULL); 5161 } 5162 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5163 } 5164 return (op_err); 5165 break; 5166 } 5167 default: 5168 /* 5169 * we do not recognize the parameter figure out what 5170 * we do. 5171 */ 5172 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Hit default param %x\n", ptype); 5173 if ((ptype & 0x4000) == 0x4000) { 5174 /* Report bit is set?? */ 5175 SCTPDBG(SCTP_DEBUG_OUTPUT1, "report op err\n"); 5176 if (op_err == NULL) { 5177 int l_len; 5178 5179 /* Ok need to try to get an mbuf */ 5180#ifdef INET6 5181 l_len = SCTP_MIN_OVERHEAD; 5182#else 5183 l_len = SCTP_MIN_V4_OVERHEAD; 5184#endif 5185 l_len += sizeof(struct sctp_chunkhdr); 5186 l_len += plen; 5187 l_len += sizeof(struct sctp_paramhdr); 5188 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5189 if (op_err) { 5190 SCTP_BUF_LEN(op_err) = 0; 5191#ifdef INET6 5192 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5193#else 5194 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5195#endif 5196 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5197 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5198 } 5199 } 5200 if (op_err) { 5201 /* If we have space */ 5202 struct sctp_paramhdr s; 5203 5204 if (err_at % 4) { 5205 uint32_t cpthis = 0; 5206 5207 pad_needed = 4 - (err_at % 4); 5208 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5209 err_at += pad_needed; 5210 } 5211 s.param_type = htons(SCTP_UNRECOG_PARAM); 5212 s.param_length = htons(sizeof(s) + plen); 5213 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5214 err_at += sizeof(s); 5215 if (plen > sizeof(tempbuf)) { 5216 plen = sizeof(tempbuf); 5217 } 5218 phdr = sctp_get_next_param(mat, at, (struct sctp_paramhdr *)tempbuf, min(sizeof(tempbuf), plen)); 5219 if (phdr == NULL) { 5220 sctp_m_freem(op_err); 5221 /* 5222 * we are out of memory but 5223 * we still need to have a 5224 * look at what to do (the 5225 * system is in trouble 5226 * though). 5227 */ 5228 op_err = NULL; 5229 goto more_processing; 5230 } 5231 m_copyback(op_err, err_at, plen, (caddr_t)phdr); 5232 err_at += plen; 5233 } 5234 } 5235 more_processing: 5236 if ((ptype & 0x8000) == 0x0000) { 5237 SCTPDBG(SCTP_DEBUG_OUTPUT1, "stop proc\n"); 5238 return (op_err); 5239 } else { 5240 /* skip this chunk and continue processing */ 5241 SCTPDBG(SCTP_DEBUG_OUTPUT1, "move on\n"); 5242 at += SCTP_SIZE32(plen); 5243 } 5244 break; 5245 5246 } 5247 phdr = sctp_get_next_param(mat, at, ¶ms, sizeof(params)); 5248 } 5249 return (op_err); 5250invalid_size: 5251 SCTPDBG(SCTP_DEBUG_OUTPUT1, "abort flag set\n"); 5252 *abort_processing = 1; 5253 if ((op_err == NULL) && phdr) { 5254 int l_len; 5255 5256#ifdef INET6 5257 l_len = SCTP_MIN_OVERHEAD; 5258#else 5259 l_len = SCTP_MIN_V4_OVERHEAD; 5260#endif 5261 l_len += sizeof(struct sctp_chunkhdr); 5262 l_len += (2 * sizeof(struct sctp_paramhdr)); 5263 op_err = sctp_get_mbuf_for_msg(l_len, 0, M_NOWAIT, 1, MT_DATA); 5264 if (op_err) { 5265 SCTP_BUF_LEN(op_err) = 0; 5266#ifdef INET6 5267 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip6_hdr)); 5268#else 5269 SCTP_BUF_RESV_UF(op_err, sizeof(struct ip)); 5270#endif 5271 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctphdr)); 5272 SCTP_BUF_RESV_UF(op_err, sizeof(struct sctp_chunkhdr)); 5273 } 5274 } 5275 if ((op_err) && phdr) { 5276 struct sctp_paramhdr s; 5277 5278 if (err_at % 4) { 5279 uint32_t cpthis = 0; 5280 5281 pad_needed = 4 - (err_at % 4); 5282 m_copyback(op_err, err_at, pad_needed, (caddr_t)&cpthis); 5283 err_at += pad_needed; 5284 } 5285 s.param_type = htons(SCTP_CAUSE_PROTOCOL_VIOLATION); 5286 s.param_length = htons(sizeof(s) + sizeof(struct sctp_paramhdr)); 5287 m_copyback(op_err, err_at, sizeof(s), (caddr_t)&s); 5288 err_at += sizeof(s); 5289 /* Only copy back the p-hdr that caused the issue */ 5290 m_copyback(op_err, err_at, sizeof(struct sctp_paramhdr), (caddr_t)phdr); 5291 } 5292 return (op_err); 5293} 5294 5295static int 5296sctp_are_there_new_addresses(struct sctp_association *asoc, 5297 struct mbuf *in_initpkt, int offset, struct sockaddr *src) 5298{ 5299 /* 5300 * Given a INIT packet, look through the packet to verify that there 5301 * are NO new addresses. As we go through the parameters add reports 5302 * of any un-understood parameters that require an error. Also we 5303 * must return (1) to drop the packet if we see a un-understood 5304 * parameter that tells us to drop the chunk. 5305 */ 5306 struct sockaddr *sa_touse; 5307 struct sockaddr *sa; 5308 struct sctp_paramhdr *phdr, params; 5309 uint16_t ptype, plen; 5310 uint8_t fnd; 5311 struct sctp_nets *net; 5312 int check_src; 5313 5314#ifdef INET 5315 struct sockaddr_in sin4, *sa4; 5316 5317#endif 5318#ifdef INET6 5319 struct sockaddr_in6 sin6, *sa6; 5320 5321#endif 5322 5323#ifdef INET 5324 memset(&sin4, 0, sizeof(sin4)); 5325 sin4.sin_family = AF_INET; 5326 sin4.sin_len = sizeof(sin4); 5327#endif 5328#ifdef INET6 5329 memset(&sin6, 0, sizeof(sin6)); 5330 sin6.sin6_family = AF_INET6; 5331 sin6.sin6_len = sizeof(sin6); 5332#endif 5333 /* First what about the src address of the pkt ? */ 5334 check_src = 0; 5335 switch (src->sa_family) { 5336#ifdef INET 5337 case AF_INET: 5338 if (asoc->scope.ipv4_addr_legal) { 5339 check_src = 1; 5340 } 5341 break; 5342#endif 5343#ifdef INET6 5344 case AF_INET6: 5345 if (asoc->scope.ipv6_addr_legal) { 5346 check_src = 1; 5347 } 5348 break; 5349#endif 5350 default: 5351 /* TSNH */ 5352 break; 5353 } 5354 if (check_src) { 5355 fnd = 0; 5356 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5357 sa = (struct sockaddr *)&net->ro._l_addr; 5358 if (sa->sa_family == src->sa_family) { 5359#ifdef INET 5360 if (sa->sa_family == AF_INET) { 5361 struct sockaddr_in *src4; 5362 5363 sa4 = (struct sockaddr_in *)sa; 5364 src4 = (struct sockaddr_in *)src; 5365 if (sa4->sin_addr.s_addr == src4->sin_addr.s_addr) { 5366 fnd = 1; 5367 break; 5368 } 5369 } 5370#endif 5371#ifdef INET6 5372 if (sa->sa_family == AF_INET6) { 5373 struct sockaddr_in6 *src6; 5374 5375 sa6 = (struct sockaddr_in6 *)sa; 5376 src6 = (struct sockaddr_in6 *)src; 5377 if (SCTP6_ARE_ADDR_EQUAL(sa6, src6)) { 5378 fnd = 1; 5379 break; 5380 } 5381 } 5382#endif 5383 } 5384 } 5385 if (fnd == 0) { 5386 /* New address added! no need to look futher. */ 5387 return (1); 5388 } 5389 } 5390 /* Ok so far lets munge through the rest of the packet */ 5391 offset += sizeof(struct sctp_init_chunk); 5392 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5393 while (phdr) { 5394 sa_touse = NULL; 5395 ptype = ntohs(phdr->param_type); 5396 plen = ntohs(phdr->param_length); 5397 switch (ptype) { 5398#ifdef INET 5399 case SCTP_IPV4_ADDRESS: 5400 { 5401 struct sctp_ipv4addr_param *p4, p4_buf; 5402 5403 phdr = sctp_get_next_param(in_initpkt, offset, 5404 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5405 if (plen != sizeof(struct sctp_ipv4addr_param) || 5406 phdr == NULL) { 5407 return (1); 5408 } 5409 if (asoc->scope.ipv4_addr_legal) { 5410 p4 = (struct sctp_ipv4addr_param *)phdr; 5411 sin4.sin_addr.s_addr = p4->addr; 5412 sa_touse = (struct sockaddr *)&sin4; 5413 } 5414 break; 5415 } 5416#endif 5417#ifdef INET6 5418 case SCTP_IPV6_ADDRESS: 5419 { 5420 struct sctp_ipv6addr_param *p6, p6_buf; 5421 5422 phdr = sctp_get_next_param(in_initpkt, offset, 5423 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5424 if (plen != sizeof(struct sctp_ipv6addr_param) || 5425 phdr == NULL) { 5426 return (1); 5427 } 5428 if (asoc->scope.ipv6_addr_legal) { 5429 p6 = (struct sctp_ipv6addr_param *)phdr; 5430 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5431 sizeof(p6->addr)); 5432 sa_touse = (struct sockaddr *)&sin6; 5433 } 5434 break; 5435 } 5436#endif 5437 default: 5438 sa_touse = NULL; 5439 break; 5440 } 5441 if (sa_touse) { 5442 /* ok, sa_touse points to one to check */ 5443 fnd = 0; 5444 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5445 sa = (struct sockaddr *)&net->ro._l_addr; 5446 if (sa->sa_family != sa_touse->sa_family) { 5447 continue; 5448 } 5449#ifdef INET 5450 if (sa->sa_family == AF_INET) { 5451 sa4 = (struct sockaddr_in *)sa; 5452 if (sa4->sin_addr.s_addr == 5453 sin4.sin_addr.s_addr) { 5454 fnd = 1; 5455 break; 5456 } 5457 } 5458#endif 5459#ifdef INET6 5460 if (sa->sa_family == AF_INET6) { 5461 sa6 = (struct sockaddr_in6 *)sa; 5462 if (SCTP6_ARE_ADDR_EQUAL( 5463 sa6, &sin6)) { 5464 fnd = 1; 5465 break; 5466 } 5467 } 5468#endif 5469 } 5470 if (!fnd) { 5471 /* New addr added! no need to look further */ 5472 return (1); 5473 } 5474 } 5475 offset += SCTP_SIZE32(plen); 5476 phdr = sctp_get_next_param(in_initpkt, offset, ¶ms, sizeof(params)); 5477 } 5478 return (0); 5479} 5480 5481/* 5482 * Given a MBUF chain that was sent into us containing an INIT. Build a 5483 * INIT-ACK with COOKIE and send back. We assume that the in_initpkt has done 5484 * a pullup to include IPv6/4header, SCTP header and initial part of INIT 5485 * message (i.e. the struct sctp_init_msg). 5486 */ 5487void 5488sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb, 5489 struct sctp_nets *src_net, struct mbuf *init_pkt, 5490 int iphlen, int offset, 5491 struct sockaddr *src, struct sockaddr *dst, 5492 struct sctphdr *sh, struct sctp_init_chunk *init_chk, 5493 uint8_t mflowtype, uint32_t mflowid, 5494 uint32_t vrf_id, uint16_t port, int hold_inp_lock) 5495{ 5496 struct sctp_association *asoc; 5497 struct mbuf *m, *m_tmp, *m_last, *m_cookie, *op_err; 5498 struct sctp_init_ack_chunk *initack; 5499 struct sctp_adaptation_layer_indication *ali; 5500 struct sctp_supported_chunk_types_param *pr_supported; 5501 struct sctp_paramhdr *ph; 5502 union sctp_sockstore *over_addr; 5503 struct sctp_scoping scp; 5504 5505#ifdef INET 5506 struct sockaddr_in *dst4 = (struct sockaddr_in *)dst; 5507 struct sockaddr_in *src4 = (struct sockaddr_in *)src; 5508 struct sockaddr_in *sin; 5509 5510#endif 5511#ifdef INET6 5512 struct sockaddr_in6 *dst6 = (struct sockaddr_in6 *)dst; 5513 struct sockaddr_in6 *src6 = (struct sockaddr_in6 *)src; 5514 struct sockaddr_in6 *sin6; 5515 5516#endif 5517 struct sockaddr *to; 5518 struct sctp_state_cookie stc; 5519 struct sctp_nets *net = NULL; 5520 uint8_t *signature = NULL; 5521 int cnt_inits_to = 0; 5522 uint16_t his_limit, i_want; 5523 int abort_flag; 5524 int nat_friendly = 0; 5525 struct socket *so; 5526 uint16_t num_ext, chunk_len, padding_len, parameter_len; 5527 5528 if (stcb) { 5529 asoc = &stcb->asoc; 5530 } else { 5531 asoc = NULL; 5532 } 5533 if ((asoc != NULL) && 5534 (SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT)) { 5535 if (sctp_are_there_new_addresses(asoc, init_pkt, offset, src)) { 5536 /* 5537 * new addresses, out of here in non-cookie-wait 5538 * states 5539 * 5540 * Send an ABORT, without the new address error cause. 5541 * This looks no different than if no listener was 5542 * present. 5543 */ 5544 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5545 "Address added"); 5546 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, 5547 mflowtype, mflowid, inp->fibnum, 5548 vrf_id, port); 5549 return; 5550 } 5551 if (src_net != NULL && (src_net->port != port)) { 5552 /* 5553 * change of remote encapsulation port, out of here 5554 * in non-cookie-wait states 5555 * 5556 * Send an ABORT, without an specific error cause. This 5557 * looks no different than if no listener was 5558 * present. 5559 */ 5560 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5561 "Remote encapsulation port changed"); 5562 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 0, op_err, 5563 mflowtype, mflowid, inp->fibnum, 5564 vrf_id, port); 5565 return; 5566 } 5567 } 5568 abort_flag = 0; 5569 op_err = sctp_arethere_unrecognized_parameters(init_pkt, 5570 (offset + sizeof(struct sctp_init_chunk)), 5571 &abort_flag, (struct sctp_chunkhdr *)init_chk, &nat_friendly); 5572 if (abort_flag) { 5573do_a_abort: 5574 if (op_err == NULL) { 5575 char msg[SCTP_DIAG_INFO_LEN]; 5576 5577 snprintf(msg, sizeof(msg), "%s:%d at %s", __FILE__, __LINE__, __func__); 5578 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 5579 msg); 5580 } 5581 sctp_send_abort(init_pkt, iphlen, src, dst, sh, 5582 init_chk->init.initiate_tag, op_err, 5583 mflowtype, mflowid, inp->fibnum, 5584 vrf_id, port); 5585 return; 5586 } 5587 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 5588 if (m == NULL) { 5589 /* No memory, INIT timer will re-attempt. */ 5590 if (op_err) 5591 sctp_m_freem(op_err); 5592 return; 5593 } 5594 chunk_len = (uint16_t) sizeof(struct sctp_init_ack_chunk); 5595 padding_len = 0; 5596 5597 /* 5598 * We might not overwrite the identification[] completely and on 5599 * some platforms time_entered will contain some padding. Therefore 5600 * zero out the cookie to avoid putting uninitialized memory on the 5601 * wire. 5602 */ 5603 memset(&stc, 0, sizeof(struct sctp_state_cookie)); 5604 5605 /* the time I built cookie */ 5606 (void)SCTP_GETTIME_TIMEVAL(&stc.time_entered); 5607 5608 /* populate any tie tags */ 5609 if (asoc != NULL) { 5610 /* unlock before tag selections */ 5611 stc.tie_tag_my_vtag = asoc->my_vtag_nonce; 5612 stc.tie_tag_peer_vtag = asoc->peer_vtag_nonce; 5613 stc.cookie_life = asoc->cookie_life; 5614 net = asoc->primary_destination; 5615 } else { 5616 stc.tie_tag_my_vtag = 0; 5617 stc.tie_tag_peer_vtag = 0; 5618 /* life I will award this cookie */ 5619 stc.cookie_life = inp->sctp_ep.def_cookie_life; 5620 } 5621 5622 /* copy in the ports for later check */ 5623 stc.myport = sh->dest_port; 5624 stc.peerport = sh->src_port; 5625 5626 /* 5627 * If we wanted to honor cookie life extentions, we would add to 5628 * stc.cookie_life. For now we should NOT honor any extension 5629 */ 5630 stc.site_scope = stc.local_scope = stc.loopback_scope = 0; 5631 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 5632 stc.ipv6_addr_legal = 1; 5633 if (SCTP_IPV6_V6ONLY(inp)) { 5634 stc.ipv4_addr_legal = 0; 5635 } else { 5636 stc.ipv4_addr_legal = 1; 5637 } 5638 } else { 5639 stc.ipv6_addr_legal = 0; 5640 stc.ipv4_addr_legal = 1; 5641 } 5642 stc.ipv4_scope = 0; 5643 if (net == NULL) { 5644 to = src; 5645 switch (dst->sa_family) { 5646#ifdef INET 5647 case AF_INET: 5648 { 5649 /* lookup address */ 5650 stc.address[0] = src4->sin_addr.s_addr; 5651 stc.address[1] = 0; 5652 stc.address[2] = 0; 5653 stc.address[3] = 0; 5654 stc.addr_type = SCTP_IPV4_ADDRESS; 5655 /* local from address */ 5656 stc.laddress[0] = dst4->sin_addr.s_addr; 5657 stc.laddress[1] = 0; 5658 stc.laddress[2] = 0; 5659 stc.laddress[3] = 0; 5660 stc.laddr_type = SCTP_IPV4_ADDRESS; 5661 /* scope_id is only for v6 */ 5662 stc.scope_id = 0; 5663 if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) || 5664 (IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) { 5665 stc.ipv4_scope = 1; 5666 } 5667 /* Must use the address in this case */ 5668 if (sctp_is_address_on_local_host(src, vrf_id)) { 5669 stc.loopback_scope = 1; 5670 stc.ipv4_scope = 1; 5671 stc.site_scope = 1; 5672 stc.local_scope = 0; 5673 } 5674 break; 5675 } 5676#endif 5677#ifdef INET6 5678 case AF_INET6: 5679 { 5680 stc.addr_type = SCTP_IPV6_ADDRESS; 5681 memcpy(&stc.address, &src6->sin6_addr, sizeof(struct in6_addr)); 5682 stc.scope_id = in6_getscope(&src6->sin6_addr); 5683 if (sctp_is_address_on_local_host(src, vrf_id)) { 5684 stc.loopback_scope = 1; 5685 stc.local_scope = 0; 5686 stc.site_scope = 1; 5687 stc.ipv4_scope = 1; 5688 } else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) || 5689 IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) { 5690 /* 5691 * If the new destination or source 5692 * is a LINK_LOCAL we must have 5693 * common both site and local scope. 5694 * Don't set local scope though 5695 * since we must depend on the 5696 * source to be added implicitly. We 5697 * cannot assure just because we 5698 * share one link that all links are 5699 * common. 5700 */ 5701 stc.local_scope = 0; 5702 stc.site_scope = 1; 5703 stc.ipv4_scope = 1; 5704 /* 5705 * we start counting for the private 5706 * address stuff at 1. since the 5707 * link local we source from won't 5708 * show up in our scoped count. 5709 */ 5710 cnt_inits_to = 1; 5711 /* 5712 * pull out the scope_id from 5713 * incoming pkt 5714 */ 5715 } else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) || 5716 IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) { 5717 /* 5718 * If the new destination or source 5719 * is SITE_LOCAL then we must have 5720 * site scope in common. 5721 */ 5722 stc.site_scope = 1; 5723 } 5724 memcpy(&stc.laddress, &dst6->sin6_addr, sizeof(struct in6_addr)); 5725 stc.laddr_type = SCTP_IPV6_ADDRESS; 5726 break; 5727 } 5728#endif 5729 default: 5730 /* TSNH */ 5731 goto do_a_abort; 5732 break; 5733 } 5734 } else { 5735 /* set the scope per the existing tcb */ 5736 5737#ifdef INET6 5738 struct sctp_nets *lnet; 5739 5740#endif 5741 5742 stc.loopback_scope = asoc->scope.loopback_scope; 5743 stc.ipv4_scope = asoc->scope.ipv4_local_scope; 5744 stc.site_scope = asoc->scope.site_scope; 5745 stc.local_scope = asoc->scope.local_scope; 5746#ifdef INET6 5747 /* Why do we not consider IPv4 LL addresses? */ 5748 TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) { 5749 if (lnet->ro._l_addr.sin6.sin6_family == AF_INET6) { 5750 if (IN6_IS_ADDR_LINKLOCAL(&lnet->ro._l_addr.sin6.sin6_addr)) { 5751 /* 5752 * if we have a LL address, start 5753 * counting at 1. 5754 */ 5755 cnt_inits_to = 1; 5756 } 5757 } 5758 } 5759#endif 5760 /* use the net pointer */ 5761 to = (struct sockaddr *)&net->ro._l_addr; 5762 switch (to->sa_family) { 5763#ifdef INET 5764 case AF_INET: 5765 sin = (struct sockaddr_in *)to; 5766 stc.address[0] = sin->sin_addr.s_addr; 5767 stc.address[1] = 0; 5768 stc.address[2] = 0; 5769 stc.address[3] = 0; 5770 stc.addr_type = SCTP_IPV4_ADDRESS; 5771 if (net->src_addr_selected == 0) { 5772 /* 5773 * strange case here, the INIT should have 5774 * did the selection. 5775 */ 5776 net->ro._s_addr = sctp_source_address_selection(inp, 5777 stcb, (sctp_route_t *) & net->ro, 5778 net, 0, vrf_id); 5779 if (net->ro._s_addr == NULL) 5780 return; 5781 5782 net->src_addr_selected = 1; 5783 5784 } 5785 stc.laddress[0] = net->ro._s_addr->address.sin.sin_addr.s_addr; 5786 stc.laddress[1] = 0; 5787 stc.laddress[2] = 0; 5788 stc.laddress[3] = 0; 5789 stc.laddr_type = SCTP_IPV4_ADDRESS; 5790 /* scope_id is only for v6 */ 5791 stc.scope_id = 0; 5792 break; 5793#endif 5794#ifdef INET6 5795 case AF_INET6: 5796 sin6 = (struct sockaddr_in6 *)to; 5797 memcpy(&stc.address, &sin6->sin6_addr, 5798 sizeof(struct in6_addr)); 5799 stc.addr_type = SCTP_IPV6_ADDRESS; 5800 stc.scope_id = sin6->sin6_scope_id; 5801 if (net->src_addr_selected == 0) { 5802 /* 5803 * strange case here, the INIT should have 5804 * done the selection. 5805 */ 5806 net->ro._s_addr = sctp_source_address_selection(inp, 5807 stcb, (sctp_route_t *) & net->ro, 5808 net, 0, vrf_id); 5809 if (net->ro._s_addr == NULL) 5810 return; 5811 5812 net->src_addr_selected = 1; 5813 } 5814 memcpy(&stc.laddress, &net->ro._s_addr->address.sin6.sin6_addr, 5815 sizeof(struct in6_addr)); 5816 stc.laddr_type = SCTP_IPV6_ADDRESS; 5817 break; 5818#endif 5819 } 5820 } 5821 /* Now lets put the SCTP header in place */ 5822 initack = mtod(m, struct sctp_init_ack_chunk *); 5823 /* Save it off for quick ref */ 5824 stc.peers_vtag = init_chk->init.initiate_tag; 5825 /* who are we */ 5826 memcpy(stc.identification, SCTP_VERSION_STRING, 5827 min(strlen(SCTP_VERSION_STRING), sizeof(stc.identification))); 5828 memset(stc.reserved, 0, SCTP_RESERVE_SPACE); 5829 /* now the chunk header */ 5830 initack->ch.chunk_type = SCTP_INITIATION_ACK; 5831 initack->ch.chunk_flags = 0; 5832 /* fill in later from mbuf we build */ 5833 initack->ch.chunk_length = 0; 5834 /* place in my tag */ 5835 if ((asoc != NULL) && 5836 ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 5837 (SCTP_GET_STATE(asoc) == SCTP_STATE_INUSE) || 5838 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED))) { 5839 /* re-use the v-tags and init-seq here */ 5840 initack->init.initiate_tag = htonl(asoc->my_vtag); 5841 initack->init.initial_tsn = htonl(asoc->init_seq_number); 5842 } else { 5843 uint32_t vtag, itsn; 5844 5845 if (hold_inp_lock) { 5846 SCTP_INP_INCR_REF(inp); 5847 SCTP_INP_RUNLOCK(inp); 5848 } 5849 if (asoc) { 5850 atomic_add_int(&asoc->refcnt, 1); 5851 SCTP_TCB_UNLOCK(stcb); 5852 new_tag: 5853 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5854 if ((asoc->peer_supports_nat) && (vtag == asoc->my_vtag)) { 5855 /* 5856 * Got a duplicate vtag on some guy behind a 5857 * nat make sure we don't use it. 5858 */ 5859 goto new_tag; 5860 } 5861 initack->init.initiate_tag = htonl(vtag); 5862 /* get a TSN to use too */ 5863 itsn = sctp_select_initial_TSN(&inp->sctp_ep); 5864 initack->init.initial_tsn = htonl(itsn); 5865 SCTP_TCB_LOCK(stcb); 5866 atomic_add_int(&asoc->refcnt, -1); 5867 } else { 5868 vtag = sctp_select_a_tag(inp, inp->sctp_lport, sh->src_port, 1); 5869 initack->init.initiate_tag = htonl(vtag); 5870 /* get a TSN to use too */ 5871 initack->init.initial_tsn = htonl(sctp_select_initial_TSN(&inp->sctp_ep)); 5872 } 5873 if (hold_inp_lock) { 5874 SCTP_INP_RLOCK(inp); 5875 SCTP_INP_DECR_REF(inp); 5876 } 5877 } 5878 /* save away my tag to */ 5879 stc.my_vtag = initack->init.initiate_tag; 5880 5881 /* set up some of the credits. */ 5882 so = inp->sctp_socket; 5883 if (so == NULL) { 5884 /* memory problem */ 5885 sctp_m_freem(m); 5886 return; 5887 } else { 5888 initack->init.a_rwnd = htonl(max(SCTP_SB_LIMIT_RCV(so), SCTP_MINIMAL_RWND)); 5889 } 5890 /* set what I want */ 5891 his_limit = ntohs(init_chk->init.num_inbound_streams); 5892 /* choose what I want */ 5893 if (asoc != NULL) { 5894 if (asoc->streamoutcnt > asoc->pre_open_streams) { 5895 i_want = asoc->streamoutcnt; 5896 } else { 5897 i_want = asoc->pre_open_streams; 5898 } 5899 } else { 5900 i_want = inp->sctp_ep.pre_open_stream_count; 5901 } 5902 if (his_limit < i_want) { 5903 /* I Want more :< */ 5904 initack->init.num_outbound_streams = init_chk->init.num_inbound_streams; 5905 } else { 5906 /* I can have what I want :> */ 5907 initack->init.num_outbound_streams = htons(i_want); 5908 } 5909 /* tell him his limit. */ 5910 initack->init.num_inbound_streams = 5911 htons(inp->sctp_ep.max_open_streams_intome); 5912 5913 /* adaptation layer indication parameter */ 5914 if (inp->sctp_ep.adaptation_layer_indicator_provided) { 5915 parameter_len = (uint16_t) sizeof(struct sctp_adaptation_layer_indication); 5916 ali = (struct sctp_adaptation_layer_indication *)(mtod(m, caddr_t)+chunk_len); 5917 ali->ph.param_type = htons(SCTP_ULP_ADAPTATION); 5918 ali->ph.param_length = htons(parameter_len); 5919 ali->indication = htonl(inp->sctp_ep.adaptation_layer_indicator); 5920 chunk_len += parameter_len; 5921 } 5922 /* ECN parameter */ 5923 if (((asoc != NULL) && (asoc->ecn_supported == 1)) || 5924 ((asoc == NULL) && (inp->ecn_supported == 1))) { 5925 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5926 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5927 ph->param_type = htons(SCTP_ECN_CAPABLE); 5928 ph->param_length = htons(parameter_len); 5929 chunk_len += parameter_len; 5930 } 5931 /* PR-SCTP supported parameter */ 5932 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5933 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5934 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5935 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5936 ph->param_type = htons(SCTP_PRSCTP_SUPPORTED); 5937 ph->param_length = htons(parameter_len); 5938 chunk_len += parameter_len; 5939 } 5940 /* Add NAT friendly parameter */ 5941 if (nat_friendly) { 5942 parameter_len = (uint16_t) sizeof(struct sctp_paramhdr); 5943 ph = (struct sctp_paramhdr *)(mtod(m, caddr_t)+chunk_len); 5944 ph->param_type = htons(SCTP_HAS_NAT_SUPPORT); 5945 ph->param_length = htons(parameter_len); 5946 chunk_len += parameter_len; 5947 } 5948 /* And now tell the peer which extensions we support */ 5949 num_ext = 0; 5950 pr_supported = (struct sctp_supported_chunk_types_param *)(mtod(m, caddr_t)+chunk_len); 5951 if (((asoc != NULL) && (asoc->prsctp_supported == 1)) || 5952 ((asoc == NULL) && (inp->prsctp_supported == 1))) { 5953 pr_supported->chunk_types[num_ext++] = SCTP_FORWARD_CUM_TSN; 5954 } 5955 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5956 ((asoc == NULL) && (inp->auth_supported == 1))) { 5957 pr_supported->chunk_types[num_ext++] = SCTP_AUTHENTICATION; 5958 } 5959 if (((asoc != NULL) && (asoc->asconf_supported == 1)) || 5960 ((asoc == NULL) && (inp->asconf_supported == 1))) { 5961 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF; 5962 pr_supported->chunk_types[num_ext++] = SCTP_ASCONF_ACK; 5963 } 5964 if (((asoc != NULL) && (asoc->reconfig_supported == 1)) || 5965 ((asoc == NULL) && (inp->reconfig_supported == 1))) { 5966 pr_supported->chunk_types[num_ext++] = SCTP_STREAM_RESET; 5967 } 5968 if (((asoc != NULL) && (asoc->nrsack_supported == 1)) || 5969 ((asoc == NULL) && (inp->nrsack_supported == 1))) { 5970 pr_supported->chunk_types[num_ext++] = SCTP_NR_SELECTIVE_ACK; 5971 } 5972 if (((asoc != NULL) && (asoc->pktdrop_supported == 1)) || 5973 ((asoc == NULL) && (inp->pktdrop_supported == 1))) { 5974 pr_supported->chunk_types[num_ext++] = SCTP_PACKET_DROPPED; 5975 } 5976 if (num_ext > 0) { 5977 parameter_len = (uint16_t) sizeof(struct sctp_supported_chunk_types_param) + num_ext; 5978 pr_supported->ph.param_type = htons(SCTP_SUPPORTED_CHUNK_EXT); 5979 pr_supported->ph.param_length = htons(parameter_len); 5980 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 5981 chunk_len += parameter_len; 5982 } 5983 /* add authentication parameters */ 5984 if (((asoc != NULL) && (asoc->auth_supported == 1)) || 5985 ((asoc == NULL) && (inp->auth_supported == 1))) { 5986 struct sctp_auth_random *randp; 5987 struct sctp_auth_hmac_algo *hmacs; 5988 struct sctp_auth_chunk_list *chunks; 5989 5990 if (padding_len > 0) { 5991 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 5992 chunk_len += padding_len; 5993 padding_len = 0; 5994 } 5995 /* generate and add RANDOM parameter */ 5996 randp = (struct sctp_auth_random *)(mtod(m, caddr_t)+chunk_len); 5997 parameter_len = (uint16_t) sizeof(struct sctp_auth_random) + 5998 SCTP_AUTH_RANDOM_SIZE_DEFAULT; 5999 randp->ph.param_type = htons(SCTP_RANDOM); 6000 randp->ph.param_length = htons(parameter_len); 6001 SCTP_READ_RANDOM(randp->random_data, SCTP_AUTH_RANDOM_SIZE_DEFAULT); 6002 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6003 chunk_len += parameter_len; 6004 6005 if (padding_len > 0) { 6006 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6007 chunk_len += padding_len; 6008 padding_len = 0; 6009 } 6010 /* add HMAC_ALGO parameter */ 6011 hmacs = (struct sctp_auth_hmac_algo *)(mtod(m, caddr_t)+chunk_len); 6012 parameter_len = (uint16_t) sizeof(struct sctp_auth_hmac_algo) + 6013 sctp_serialize_hmaclist(inp->sctp_ep.local_hmacs, 6014 (uint8_t *) hmacs->hmac_ids); 6015 hmacs->ph.param_type = htons(SCTP_HMAC_LIST); 6016 hmacs->ph.param_length = htons(parameter_len); 6017 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6018 chunk_len += parameter_len; 6019 6020 if (padding_len > 0) { 6021 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6022 chunk_len += padding_len; 6023 padding_len = 0; 6024 } 6025 /* add CHUNKS parameter */ 6026 chunks = (struct sctp_auth_chunk_list *)(mtod(m, caddr_t)+chunk_len); 6027 parameter_len = (uint16_t) sizeof(struct sctp_auth_chunk_list) + 6028 sctp_serialize_auth_chunks(inp->sctp_ep.local_auth_chunks, 6029 chunks->chunk_types); 6030 chunks->ph.param_type = htons(SCTP_CHUNK_LIST); 6031 chunks->ph.param_length = htons(parameter_len); 6032 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6033 chunk_len += parameter_len; 6034 } 6035 SCTP_BUF_LEN(m) = chunk_len; 6036 m_last = m; 6037 /* now the addresses */ 6038 /* 6039 * To optimize this we could put the scoping stuff into a structure 6040 * and remove the individual uint8's from the stc structure. Then we 6041 * could just sifa in the address within the stc.. but for now this 6042 * is a quick hack to get the address stuff teased apart. 6043 */ 6044 scp.ipv4_addr_legal = stc.ipv4_addr_legal; 6045 scp.ipv6_addr_legal = stc.ipv6_addr_legal; 6046 scp.loopback_scope = stc.loopback_scope; 6047 scp.ipv4_local_scope = stc.ipv4_scope; 6048 scp.local_scope = stc.local_scope; 6049 scp.site_scope = stc.site_scope; 6050 m_last = sctp_add_addresses_to_i_ia(inp, stcb, &scp, m_last, 6051 cnt_inits_to, 6052 &padding_len, &chunk_len); 6053 /* padding_len can only be positive, if no addresses have been added */ 6054 if (padding_len > 0) { 6055 memset(mtod(m, caddr_t)+chunk_len, 0, padding_len); 6056 chunk_len += padding_len; 6057 SCTP_BUF_LEN(m) += padding_len; 6058 padding_len = 0; 6059 } 6060 /* tack on the operational error if present */ 6061 if (op_err) { 6062 parameter_len = 0; 6063 for (m_tmp = op_err; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6064 parameter_len += SCTP_BUF_LEN(m_tmp); 6065 } 6066 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6067 SCTP_BUF_NEXT(m_last) = op_err; 6068 while (SCTP_BUF_NEXT(m_last) != NULL) { 6069 m_last = SCTP_BUF_NEXT(m_last); 6070 } 6071 chunk_len += parameter_len; 6072 } 6073 if (padding_len > 0) { 6074 m_last = sctp_add_pad_tombuf(m_last, padding_len); 6075 if (m_last == NULL) { 6076 /* Houston we have a problem, no space */ 6077 sctp_m_freem(m); 6078 return; 6079 } 6080 chunk_len += padding_len; 6081 padding_len = 0; 6082 } 6083 /* Now we must build a cookie */ 6084 m_cookie = sctp_add_cookie(init_pkt, offset, m, 0, &stc, &signature); 6085 if (m_cookie == NULL) { 6086 /* memory problem */ 6087 sctp_m_freem(m); 6088 return; 6089 } 6090 /* Now append the cookie to the end and update the space/size */ 6091 SCTP_BUF_NEXT(m_last) = m_cookie; 6092 parameter_len = 0; 6093 for (m_tmp = m_cookie; m_tmp != NULL; m_tmp = SCTP_BUF_NEXT(m_tmp)) { 6094 parameter_len += SCTP_BUF_LEN(m_tmp); 6095 if (SCTP_BUF_NEXT(m_tmp) == NULL) { 6096 m_last = m_tmp; 6097 } 6098 } 6099 padding_len = SCTP_SIZE32(parameter_len) - parameter_len; 6100 chunk_len += parameter_len; 6101 6102 /* 6103 * Place in the size, but we don't include the last pad (if any) in 6104 * the INIT-ACK. 6105 */ 6106 initack->ch.chunk_length = htons(chunk_len); 6107 6108 /* 6109 * Time to sign the cookie, we don't sign over the cookie signature 6110 * though thus we set trailer. 6111 */ 6112 (void)sctp_hmac_m(SCTP_HMAC, 6113 (uint8_t *) inp->sctp_ep.secret_key[(int)(inp->sctp_ep.current_secret_number)], 6114 SCTP_SECRET_SIZE, m_cookie, sizeof(struct sctp_paramhdr), 6115 (uint8_t *) signature, SCTP_SIGNATURE_SIZE); 6116 /* 6117 * We sifa 0 here to NOT set IP_DF if its IPv4, we ignore the return 6118 * here since the timer will drive a retranmission. 6119 */ 6120 if (padding_len > 0) { 6121 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 6122 sctp_m_freem(m); 6123 return; 6124 } 6125 } 6126 if (stc.loopback_scope) { 6127 over_addr = (union sctp_sockstore *)dst; 6128 } else { 6129 over_addr = NULL; 6130 } 6131 6132 (void)sctp_lowlevel_chunk_output(inp, NULL, NULL, to, m, 0, NULL, 0, 0, 6133 0, 0, 6134 inp->sctp_lport, sh->src_port, init_chk->init.initiate_tag, 6135 port, over_addr, 6136 mflowtype, mflowid, 6137 SCTP_SO_NOT_LOCKED); 6138 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 6139} 6140 6141 6142static void 6143sctp_prune_prsctp(struct sctp_tcb *stcb, 6144 struct sctp_association *asoc, 6145 struct sctp_sndrcvinfo *srcv, 6146 int dataout) 6147{ 6148 int freed_spc = 0; 6149 struct sctp_tmit_chunk *chk, *nchk; 6150 6151 SCTP_TCB_LOCK_ASSERT(stcb); 6152 if ((asoc->prsctp_supported) && 6153 (asoc->sent_queue_cnt_removeable > 0)) { 6154 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 6155 /* 6156 * Look for chunks marked with the PR_SCTP flag AND 6157 * the buffer space flag. If the one being sent is 6158 * equal or greater priority then purge the old one 6159 * and free some space. 6160 */ 6161 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6162 /* 6163 * This one is PR-SCTP AND buffer space 6164 * limited type 6165 */ 6166 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6167 /* 6168 * Lower numbers equates to higher 6169 * priority so if the one we are 6170 * looking at has a larger or equal 6171 * priority we want to drop the data 6172 * and NOT retransmit it. 6173 */ 6174 if (chk->data) { 6175 /* 6176 * We release the book_size 6177 * if the mbuf is here 6178 */ 6179 int ret_spc; 6180 uint8_t sent; 6181 6182 if (chk->sent > SCTP_DATAGRAM_UNSENT) 6183 sent = 1; 6184 else 6185 sent = 0; 6186 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6187 sent, 6188 SCTP_SO_LOCKED); 6189 freed_spc += ret_spc; 6190 if (freed_spc >= dataout) { 6191 return; 6192 } 6193 } /* if chunk was present */ 6194 } /* if of sufficent priority */ 6195 } /* if chunk has enabled */ 6196 } /* tailqforeach */ 6197 6198 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 6199 /* Here we must move to the sent queue and mark */ 6200 if (PR_SCTP_BUF_ENABLED(chk->flags)) { 6201 if (chk->rec.data.timetodrop.tv_sec >= (long)srcv->sinfo_timetolive) { 6202 if (chk->data) { 6203 /* 6204 * We release the book_size 6205 * if the mbuf is here 6206 */ 6207 int ret_spc; 6208 6209 ret_spc = sctp_release_pr_sctp_chunk(stcb, chk, 6210 0, SCTP_SO_LOCKED); 6211 6212 freed_spc += ret_spc; 6213 if (freed_spc >= dataout) { 6214 return; 6215 } 6216 } /* end if chk->data */ 6217 } /* end if right class */ 6218 } /* end if chk pr-sctp */ 6219 } /* tailqforeachsafe (chk) */ 6220 } /* if enabled in asoc */ 6221} 6222 6223int 6224sctp_get_frag_point(struct sctp_tcb *stcb, 6225 struct sctp_association *asoc) 6226{ 6227 int siz, ovh; 6228 6229 /* 6230 * For endpoints that have both v6 and v4 addresses we must reserve 6231 * room for the ipv6 header, for those that are only dealing with V4 6232 * we use a larger frag point. 6233 */ 6234 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 6235 ovh = SCTP_MED_OVERHEAD; 6236 } else { 6237 ovh = SCTP_MED_V4_OVERHEAD; 6238 } 6239 6240 if (stcb->asoc.sctp_frag_point > asoc->smallest_mtu) 6241 siz = asoc->smallest_mtu - ovh; 6242 else 6243 siz = (stcb->asoc.sctp_frag_point - ovh); 6244 /* 6245 * if (siz > (MCLBYTES-sizeof(struct sctp_data_chunk))) { 6246 */ 6247 /* A data chunk MUST fit in a cluster */ 6248 /* siz = (MCLBYTES - sizeof(struct sctp_data_chunk)); */ 6249 /* } */ 6250 6251 /* adjust for an AUTH chunk if DATA requires auth */ 6252 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) 6253 siz -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 6254 6255 if (siz % 4) { 6256 /* make it an even word boundary please */ 6257 siz -= (siz % 4); 6258 } 6259 return (siz); 6260} 6261 6262static void 6263sctp_set_prsctp_policy(struct sctp_stream_queue_pending *sp) 6264{ 6265 /* 6266 * We assume that the user wants PR_SCTP_TTL if the user provides a 6267 * positive lifetime but does not specify any PR_SCTP policy. 6268 */ 6269 if (PR_SCTP_ENABLED(sp->sinfo_flags)) { 6270 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6271 } else if (sp->timetolive > 0) { 6272 sp->sinfo_flags |= SCTP_PR_SCTP_TTL; 6273 sp->act_flags |= PR_SCTP_POLICY(sp->sinfo_flags); 6274 } else { 6275 return; 6276 } 6277 switch (PR_SCTP_POLICY(sp->sinfo_flags)) { 6278 case CHUNK_FLAGS_PR_SCTP_BUF: 6279 /* 6280 * Time to live is a priority stored in tv_sec when doing 6281 * the buffer drop thing. 6282 */ 6283 sp->ts.tv_sec = sp->timetolive; 6284 sp->ts.tv_usec = 0; 6285 break; 6286 case CHUNK_FLAGS_PR_SCTP_TTL: 6287 { 6288 struct timeval tv; 6289 6290 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6291 tv.tv_sec = sp->timetolive / 1000; 6292 tv.tv_usec = (sp->timetolive * 1000) % 1000000; 6293 /* 6294 * TODO sctp_constants.h needs alternative time 6295 * macros when _KERNEL is undefined. 6296 */ 6297 timevaladd(&sp->ts, &tv); 6298 } 6299 break; 6300 case CHUNK_FLAGS_PR_SCTP_RTX: 6301 /* 6302 * Time to live is a the number or retransmissions stored in 6303 * tv_sec. 6304 */ 6305 sp->ts.tv_sec = sp->timetolive; 6306 sp->ts.tv_usec = 0; 6307 break; 6308 default: 6309 SCTPDBG(SCTP_DEBUG_USRREQ1, 6310 "Unknown PR_SCTP policy %u.\n", 6311 PR_SCTP_POLICY(sp->sinfo_flags)); 6312 break; 6313 } 6314} 6315 6316static int 6317sctp_msg_append(struct sctp_tcb *stcb, 6318 struct sctp_nets *net, 6319 struct mbuf *m, 6320 struct sctp_sndrcvinfo *srcv, int hold_stcb_lock) 6321{ 6322 int error = 0; 6323 struct mbuf *at; 6324 struct sctp_stream_queue_pending *sp = NULL; 6325 struct sctp_stream_out *strm; 6326 6327 /* 6328 * Given an mbuf chain, put it into the association send queue and 6329 * place it on the wheel 6330 */ 6331 if (srcv->sinfo_stream >= stcb->asoc.streamoutcnt) { 6332 /* Invalid stream number */ 6333 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6334 error = EINVAL; 6335 goto out_now; 6336 } 6337 if ((stcb->asoc.stream_locked) && 6338 (stcb->asoc.stream_locked_on != srcv->sinfo_stream)) { 6339 SCTP_LTRACE_ERR_RET_PKT(m, NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 6340 error = EINVAL; 6341 goto out_now; 6342 } 6343 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 6344 /* Now can we send this? */ 6345 if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_SENT) || 6346 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 6347 (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 6348 (stcb->asoc.state & SCTP_STATE_SHUTDOWN_PENDING)) { 6349 /* got data while shutting down */ 6350 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 6351 error = ECONNRESET; 6352 goto out_now; 6353 } 6354 sctp_alloc_a_strmoq(stcb, sp); 6355 if (sp == NULL) { 6356 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6357 error = ENOMEM; 6358 goto out_now; 6359 } 6360 sp->sinfo_flags = srcv->sinfo_flags; 6361 sp->timetolive = srcv->sinfo_timetolive; 6362 sp->ppid = srcv->sinfo_ppid; 6363 sp->context = srcv->sinfo_context; 6364 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 6365 sp->net = net; 6366 atomic_add_int(&sp->net->ref_count, 1); 6367 } else { 6368 sp->net = NULL; 6369 } 6370 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 6371 sp->stream = srcv->sinfo_stream; 6372 sp->msg_is_complete = 1; 6373 sp->sender_all_done = 1; 6374 sp->some_taken = 0; 6375 sp->data = m; 6376 sp->tail_mbuf = NULL; 6377 sctp_set_prsctp_policy(sp); 6378 /* 6379 * We could in theory (for sendall) sifa the length in, but we would 6380 * still have to hunt through the chain since we need to setup the 6381 * tail_mbuf 6382 */ 6383 sp->length = 0; 6384 for (at = m; at; at = SCTP_BUF_NEXT(at)) { 6385 if (SCTP_BUF_NEXT(at) == NULL) 6386 sp->tail_mbuf = at; 6387 sp->length += SCTP_BUF_LEN(at); 6388 } 6389 if (srcv->sinfo_keynumber_valid) { 6390 sp->auth_keyid = srcv->sinfo_keynumber; 6391 } else { 6392 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 6393 } 6394 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 6395 sctp_auth_key_acquire(stcb, sp->auth_keyid); 6396 sp->holds_key_ref = 1; 6397 } 6398 if (hold_stcb_lock == 0) { 6399 SCTP_TCB_SEND_LOCK(stcb); 6400 } 6401 sctp_snd_sb_alloc(stcb, sp->length); 6402 atomic_add_int(&stcb->asoc.stream_queue_cnt, 1); 6403 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 6404 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, &stcb->asoc, strm, sp, 1); 6405 m = NULL; 6406 if (hold_stcb_lock == 0) { 6407 SCTP_TCB_SEND_UNLOCK(stcb); 6408 } 6409out_now: 6410 if (m) { 6411 sctp_m_freem(m); 6412 } 6413 return (error); 6414} 6415 6416 6417static struct mbuf * 6418sctp_copy_mbufchain(struct mbuf *clonechain, 6419 struct mbuf *outchain, 6420 struct mbuf **endofchain, 6421 int can_take_mbuf, 6422 int sizeofcpy, 6423 uint8_t copy_by_ref) 6424{ 6425 struct mbuf *m; 6426 struct mbuf *appendchain; 6427 caddr_t cp; 6428 int len; 6429 6430 if (endofchain == NULL) { 6431 /* error */ 6432error_out: 6433 if (outchain) 6434 sctp_m_freem(outchain); 6435 return (NULL); 6436 } 6437 if (can_take_mbuf) { 6438 appendchain = clonechain; 6439 } else { 6440 if (!copy_by_ref && 6441 (sizeofcpy <= (int)((((SCTP_BASE_SYSCTL(sctp_mbuf_threshold_count) - 1) * MLEN) + MHLEN))) 6442 ) { 6443 /* Its not in a cluster */ 6444 if (*endofchain == NULL) { 6445 /* lets get a mbuf cluster */ 6446 if (outchain == NULL) { 6447 /* This is the general case */ 6448 new_mbuf: 6449 outchain = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6450 if (outchain == NULL) { 6451 goto error_out; 6452 } 6453 SCTP_BUF_LEN(outchain) = 0; 6454 *endofchain = outchain; 6455 /* get the prepend space */ 6456 SCTP_BUF_RESV_UF(outchain, (SCTP_FIRST_MBUF_RESV + 4)); 6457 } else { 6458 /* 6459 * We really should not get a NULL 6460 * in endofchain 6461 */ 6462 /* find end */ 6463 m = outchain; 6464 while (m) { 6465 if (SCTP_BUF_NEXT(m) == NULL) { 6466 *endofchain = m; 6467 break; 6468 } 6469 m = SCTP_BUF_NEXT(m); 6470 } 6471 /* sanity */ 6472 if (*endofchain == NULL) { 6473 /* 6474 * huh, TSNH XXX maybe we 6475 * should panic 6476 */ 6477 sctp_m_freem(outchain); 6478 goto new_mbuf; 6479 } 6480 } 6481 /* get the new end of length */ 6482 len = M_TRAILINGSPACE(*endofchain); 6483 } else { 6484 /* how much is left at the end? */ 6485 len = M_TRAILINGSPACE(*endofchain); 6486 } 6487 /* Find the end of the data, for appending */ 6488 cp = (mtod((*endofchain), caddr_t)+SCTP_BUF_LEN((*endofchain))); 6489 6490 /* Now lets copy it out */ 6491 if (len >= sizeofcpy) { 6492 /* It all fits, copy it in */ 6493 m_copydata(clonechain, 0, sizeofcpy, cp); 6494 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6495 } else { 6496 /* fill up the end of the chain */ 6497 if (len > 0) { 6498 m_copydata(clonechain, 0, len, cp); 6499 SCTP_BUF_LEN((*endofchain)) += len; 6500 /* now we need another one */ 6501 sizeofcpy -= len; 6502 } 6503 m = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_HEADER); 6504 if (m == NULL) { 6505 /* We failed */ 6506 goto error_out; 6507 } 6508 SCTP_BUF_NEXT((*endofchain)) = m; 6509 *endofchain = m; 6510 cp = mtod((*endofchain), caddr_t); 6511 m_copydata(clonechain, len, sizeofcpy, cp); 6512 SCTP_BUF_LEN((*endofchain)) += sizeofcpy; 6513 } 6514 return (outchain); 6515 } else { 6516 /* copy the old fashion way */ 6517 appendchain = SCTP_M_COPYM(clonechain, 0, M_COPYALL, M_NOWAIT); 6518#ifdef SCTP_MBUF_LOGGING 6519 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6520 sctp_log_mbc(appendchain, SCTP_MBUF_ICOPY); 6521 } 6522#endif 6523 } 6524 } 6525 if (appendchain == NULL) { 6526 /* error */ 6527 if (outchain) 6528 sctp_m_freem(outchain); 6529 return (NULL); 6530 } 6531 if (outchain) { 6532 /* tack on to the end */ 6533 if (*endofchain != NULL) { 6534 SCTP_BUF_NEXT(((*endofchain))) = appendchain; 6535 } else { 6536 m = outchain; 6537 while (m) { 6538 if (SCTP_BUF_NEXT(m) == NULL) { 6539 SCTP_BUF_NEXT(m) = appendchain; 6540 break; 6541 } 6542 m = SCTP_BUF_NEXT(m); 6543 } 6544 } 6545 /* 6546 * save off the end and update the end-chain postion 6547 */ 6548 m = appendchain; 6549 while (m) { 6550 if (SCTP_BUF_NEXT(m) == NULL) { 6551 *endofchain = m; 6552 break; 6553 } 6554 m = SCTP_BUF_NEXT(m); 6555 } 6556 return (outchain); 6557 } else { 6558 /* save off the end and update the end-chain postion */ 6559 m = appendchain; 6560 while (m) { 6561 if (SCTP_BUF_NEXT(m) == NULL) { 6562 *endofchain = m; 6563 break; 6564 } 6565 m = SCTP_BUF_NEXT(m); 6566 } 6567 return (appendchain); 6568 } 6569} 6570 6571static int 6572sctp_med_chunk_output(struct sctp_inpcb *inp, 6573 struct sctp_tcb *stcb, 6574 struct sctp_association *asoc, 6575 int *num_out, 6576 int *reason_code, 6577 int control_only, int from_where, 6578 struct timeval *now, int *now_filled, int frag_point, int so_locked 6579#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 6580 SCTP_UNUSED 6581#endif 6582); 6583 6584static void 6585sctp_sendall_iterator(struct sctp_inpcb *inp, struct sctp_tcb *stcb, void *ptr, 6586 uint32_t val SCTP_UNUSED) 6587{ 6588 struct sctp_copy_all *ca; 6589 struct mbuf *m; 6590 int ret = 0; 6591 int added_control = 0; 6592 int un_sent, do_chunk_output = 1; 6593 struct sctp_association *asoc; 6594 struct sctp_nets *net; 6595 6596 ca = (struct sctp_copy_all *)ptr; 6597 if (ca->m == NULL) { 6598 return; 6599 } 6600 if (ca->inp != inp) { 6601 /* TSNH */ 6602 return; 6603 } 6604 if (ca->sndlen > 0) { 6605 m = SCTP_M_COPYM(ca->m, 0, M_COPYALL, M_NOWAIT); 6606 if (m == NULL) { 6607 /* can't copy so we are done */ 6608 ca->cnt_failed++; 6609 return; 6610 } 6611#ifdef SCTP_MBUF_LOGGING 6612 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 6613 sctp_log_mbc(m, SCTP_MBUF_ICOPY); 6614 } 6615#endif 6616 } else { 6617 m = NULL; 6618 } 6619 SCTP_TCB_LOCK_ASSERT(stcb); 6620 if (stcb->asoc.alternate) { 6621 net = stcb->asoc.alternate; 6622 } else { 6623 net = stcb->asoc.primary_destination; 6624 } 6625 if (ca->sndrcv.sinfo_flags & SCTP_ABORT) { 6626 /* Abort this assoc with m as the user defined reason */ 6627 if (m != NULL) { 6628 SCTP_BUF_PREPEND(m, sizeof(struct sctp_paramhdr), M_NOWAIT); 6629 } else { 6630 m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 6631 0, M_NOWAIT, 1, MT_DATA); 6632 SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr); 6633 } 6634 if (m != NULL) { 6635 struct sctp_paramhdr *ph; 6636 6637 ph = mtod(m, struct sctp_paramhdr *); 6638 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 6639 ph->param_length = htons(sizeof(struct sctp_paramhdr) + ca->sndlen); 6640 } 6641 /* 6642 * We add one here to keep the assoc from dis-appearing on 6643 * us. 6644 */ 6645 atomic_add_int(&stcb->asoc.refcnt, 1); 6646 sctp_abort_an_association(inp, stcb, m, SCTP_SO_NOT_LOCKED); 6647 /* 6648 * sctp_abort_an_association calls sctp_free_asoc() free 6649 * association will NOT free it since we incremented the 6650 * refcnt .. we do this to prevent it being freed and things 6651 * getting tricky since we could end up (from free_asoc) 6652 * calling inpcb_free which would get a recursive lock call 6653 * to the iterator lock.. But as a consequence of that the 6654 * stcb will return to us un-locked.. since free_asoc 6655 * returns with either no TCB or the TCB unlocked, we must 6656 * relock.. to unlock in the iterator timer :-0 6657 */ 6658 SCTP_TCB_LOCK(stcb); 6659 atomic_add_int(&stcb->asoc.refcnt, -1); 6660 goto no_chunk_output; 6661 } else { 6662 if (m) { 6663 ret = sctp_msg_append(stcb, net, m, 6664 &ca->sndrcv, 1); 6665 } 6666 asoc = &stcb->asoc; 6667 if (ca->sndrcv.sinfo_flags & SCTP_EOF) { 6668 /* shutdown this assoc */ 6669 int cnt; 6670 6671 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED); 6672 6673 if (TAILQ_EMPTY(&asoc->send_queue) && 6674 TAILQ_EMPTY(&asoc->sent_queue) && 6675 (cnt == 0)) { 6676 if (asoc->locked_on_sending) { 6677 goto abort_anyway; 6678 } 6679 /* 6680 * there is nothing queued to send, so I'm 6681 * done... 6682 */ 6683 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6684 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6685 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6686 /* 6687 * only send SHUTDOWN the first time 6688 * through 6689 */ 6690 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 6691 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 6692 } 6693 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 6694 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 6695 sctp_stop_timers_for_shutdown(stcb); 6696 sctp_send_shutdown(stcb, net); 6697 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 6698 net); 6699 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6700 asoc->primary_destination); 6701 added_control = 1; 6702 do_chunk_output = 0; 6703 } 6704 } else { 6705 /* 6706 * we still got (or just got) data to send, 6707 * so set SHUTDOWN_PENDING 6708 */ 6709 /* 6710 * XXX sockets draft says that SCTP_EOF 6711 * should be sent with no data. currently, 6712 * we will allow user data to be sent first 6713 * and move to SHUTDOWN-PENDING 6714 */ 6715 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 6716 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 6717 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 6718 if (asoc->locked_on_sending) { 6719 /* 6720 * Locked to send out the 6721 * data 6722 */ 6723 struct sctp_stream_queue_pending *sp; 6724 6725 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 6726 if (sp) { 6727 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 6728 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 6729 } 6730 } 6731 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 6732 if (TAILQ_EMPTY(&asoc->send_queue) && 6733 TAILQ_EMPTY(&asoc->sent_queue) && 6734 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 6735 struct mbuf *op_err; 6736 char msg[SCTP_DIAG_INFO_LEN]; 6737 6738 abort_anyway: 6739 snprintf(msg, sizeof(msg), 6740 "%s:%d at %s", __FILE__, __LINE__, __func__); 6741 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6742 msg); 6743 atomic_add_int(&stcb->asoc.refcnt, 1); 6744 sctp_abort_an_association(stcb->sctp_ep, stcb, 6745 op_err, SCTP_SO_NOT_LOCKED); 6746 atomic_add_int(&stcb->asoc.refcnt, -1); 6747 goto no_chunk_output; 6748 } 6749 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 6750 asoc->primary_destination); 6751 } 6752 } 6753 6754 } 6755 } 6756 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 6757 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 6758 6759 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 6760 (stcb->asoc.total_flight > 0) && 6761 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 6762 do_chunk_output = 0; 6763 } 6764 if (do_chunk_output) 6765 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_NOT_LOCKED); 6766 else if (added_control) { 6767 int num_out, reason, now_filled = 0; 6768 struct timeval now; 6769 int frag_point; 6770 6771 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 6772 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 6773 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_NOT_LOCKED); 6774 } 6775no_chunk_output: 6776 if (ret) { 6777 ca->cnt_failed++; 6778 } else { 6779 ca->cnt_sent++; 6780 } 6781} 6782 6783static void 6784sctp_sendall_completes(void *ptr, uint32_t val SCTP_UNUSED) 6785{ 6786 struct sctp_copy_all *ca; 6787 6788 ca = (struct sctp_copy_all *)ptr; 6789 /* 6790 * Do a notify here? Kacheong suggests that the notify be done at 6791 * the send time.. so you would push up a notification if any send 6792 * failed. Don't know if this is feasable since the only failures we 6793 * have is "memory" related and if you cannot get an mbuf to send 6794 * the data you surely can't get an mbuf to send up to notify the 6795 * user you can't send the data :-> 6796 */ 6797 6798 /* now free everything */ 6799 sctp_m_freem(ca->m); 6800 SCTP_FREE(ca, SCTP_M_COPYAL); 6801} 6802 6803static struct mbuf * 6804sctp_copy_out_all(struct uio *uio, int len) 6805{ 6806 struct mbuf *ret, *at; 6807 int left, willcpy, cancpy, error; 6808 6809 ret = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_WAITOK, 1, MT_DATA); 6810 if (ret == NULL) { 6811 /* TSNH */ 6812 return (NULL); 6813 } 6814 left = len; 6815 SCTP_BUF_LEN(ret) = 0; 6816 /* save space for the data chunk header */ 6817 cancpy = M_TRAILINGSPACE(ret); 6818 willcpy = min(cancpy, left); 6819 at = ret; 6820 while (left > 0) { 6821 /* Align data to the end */ 6822 error = uiomove(mtod(at, caddr_t), willcpy, uio); 6823 if (error) { 6824 err_out_now: 6825 sctp_m_freem(at); 6826 return (NULL); 6827 } 6828 SCTP_BUF_LEN(at) = willcpy; 6829 SCTP_BUF_NEXT_PKT(at) = SCTP_BUF_NEXT(at) = 0; 6830 left -= willcpy; 6831 if (left > 0) { 6832 SCTP_BUF_NEXT(at) = sctp_get_mbuf_for_msg(left, 0, M_WAITOK, 1, MT_DATA); 6833 if (SCTP_BUF_NEXT(at) == NULL) { 6834 goto err_out_now; 6835 } 6836 at = SCTP_BUF_NEXT(at); 6837 SCTP_BUF_LEN(at) = 0; 6838 cancpy = M_TRAILINGSPACE(at); 6839 willcpy = min(cancpy, left); 6840 } 6841 } 6842 return (ret); 6843} 6844 6845static int 6846sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m, 6847 struct sctp_sndrcvinfo *srcv) 6848{ 6849 int ret; 6850 struct sctp_copy_all *ca; 6851 6852 SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all), 6853 SCTP_M_COPYAL); 6854 if (ca == NULL) { 6855 sctp_m_freem(m); 6856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6857 return (ENOMEM); 6858 } 6859 memset(ca, 0, sizeof(struct sctp_copy_all)); 6860 6861 ca->inp = inp; 6862 if (srcv) { 6863 memcpy(&ca->sndrcv, srcv, sizeof(struct sctp_nonpad_sndrcvinfo)); 6864 } 6865 /* 6866 * take off the sendall flag, it would be bad if we failed to do 6867 * this :-0 6868 */ 6869 ca->sndrcv.sinfo_flags &= ~SCTP_SENDALL; 6870 /* get length and mbuf chain */ 6871 if (uio) { 6872 ca->sndlen = uio->uio_resid; 6873 ca->m = sctp_copy_out_all(uio, ca->sndlen); 6874 if (ca->m == NULL) { 6875 SCTP_FREE(ca, SCTP_M_COPYAL); 6876 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 6877 return (ENOMEM); 6878 } 6879 } else { 6880 /* Gather the length of the send */ 6881 struct mbuf *mat; 6882 6883 ca->sndlen = 0; 6884 for (mat = m; mat; mat = SCTP_BUF_NEXT(mat)) { 6885 ca->sndlen += SCTP_BUF_LEN(mat); 6886 } 6887 } 6888 ret = sctp_initiate_iterator(NULL, sctp_sendall_iterator, NULL, 6889 SCTP_PCB_ANY_FLAGS, SCTP_PCB_ANY_FEATURES, 6890 SCTP_ASOC_ANY_STATE, 6891 (void *)ca, 0, 6892 sctp_sendall_completes, inp, 1); 6893 if (ret) { 6894 SCTP_PRINTF("Failed to initiate iterator for sendall\n"); 6895 SCTP_FREE(ca, SCTP_M_COPYAL); 6896 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 6897 return (EFAULT); 6898 } 6899 return (0); 6900} 6901 6902 6903void 6904sctp_toss_old_cookies(struct sctp_tcb *stcb, struct sctp_association *asoc) 6905{ 6906 struct sctp_tmit_chunk *chk, *nchk; 6907 6908 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 6909 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 6910 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 6911 if (chk->data) { 6912 sctp_m_freem(chk->data); 6913 chk->data = NULL; 6914 } 6915 asoc->ctrl_queue_cnt--; 6916 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6917 } 6918 } 6919} 6920 6921void 6922sctp_toss_old_asconf(struct sctp_tcb *stcb) 6923{ 6924 struct sctp_association *asoc; 6925 struct sctp_tmit_chunk *chk, *nchk; 6926 struct sctp_asconf_chunk *acp; 6927 6928 asoc = &stcb->asoc; 6929 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 6930 /* find SCTP_ASCONF chunk in queue */ 6931 if (chk->rec.chunk_id.id == SCTP_ASCONF) { 6932 if (chk->data) { 6933 acp = mtod(chk->data, struct sctp_asconf_chunk *); 6934 if (SCTP_TSN_GT(ntohl(acp->serial_number), asoc->asconf_seq_out_acked)) { 6935 /* Not Acked yet */ 6936 break; 6937 } 6938 } 6939 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 6940 if (chk->data) { 6941 sctp_m_freem(chk->data); 6942 chk->data = NULL; 6943 } 6944 asoc->ctrl_queue_cnt--; 6945 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6946 } 6947 } 6948} 6949 6950 6951static void 6952sctp_clean_up_datalist(struct sctp_tcb *stcb, 6953 struct sctp_association *asoc, 6954 struct sctp_tmit_chunk **data_list, 6955 int bundle_at, 6956 struct sctp_nets *net) 6957{ 6958 int i; 6959 struct sctp_tmit_chunk *tp1; 6960 6961 for (i = 0; i < bundle_at; i++) { 6962 /* off of the send queue */ 6963 TAILQ_REMOVE(&asoc->send_queue, data_list[i], sctp_next); 6964 asoc->send_queue_cnt--; 6965 if (i > 0) { 6966 /* 6967 * Any chunk NOT 0 you zap the time chunk 0 gets 6968 * zapped or set based on if a RTO measurment is 6969 * needed. 6970 */ 6971 data_list[i]->do_rtt = 0; 6972 } 6973 /* record time */ 6974 data_list[i]->sent_rcv_time = net->last_sent_time; 6975 data_list[i]->rec.data.cwnd_at_send = net->cwnd; 6976 data_list[i]->rec.data.fast_retran_tsn = data_list[i]->rec.data.TSN_seq; 6977 if (data_list[i]->whoTo == NULL) { 6978 data_list[i]->whoTo = net; 6979 atomic_add_int(&net->ref_count, 1); 6980 } 6981 /* on to the sent queue */ 6982 tp1 = TAILQ_LAST(&asoc->sent_queue, sctpchunk_listhead); 6983 if ((tp1) && SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6984 struct sctp_tmit_chunk *tpp; 6985 6986 /* need to move back */ 6987 back_up_more: 6988 tpp = TAILQ_PREV(tp1, sctpchunk_listhead, sctp_next); 6989 if (tpp == NULL) { 6990 TAILQ_INSERT_BEFORE(tp1, data_list[i], sctp_next); 6991 goto all_done; 6992 } 6993 tp1 = tpp; 6994 if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, data_list[i]->rec.data.TSN_seq)) { 6995 goto back_up_more; 6996 } 6997 TAILQ_INSERT_AFTER(&asoc->sent_queue, tp1, data_list[i], sctp_next); 6998 } else { 6999 TAILQ_INSERT_TAIL(&asoc->sent_queue, 7000 data_list[i], 7001 sctp_next); 7002 } 7003all_done: 7004 /* This does not lower until the cum-ack passes it */ 7005 asoc->sent_queue_cnt++; 7006 if ((asoc->peers_rwnd <= 0) && 7007 (asoc->total_flight == 0) && 7008 (bundle_at == 1)) { 7009 /* Mark the chunk as being a window probe */ 7010 SCTP_STAT_INCR(sctps_windowprobed); 7011 } 7012#ifdef SCTP_AUDITING_ENABLED 7013 sctp_audit_log(0xC2, 3); 7014#endif 7015 data_list[i]->sent = SCTP_DATAGRAM_SENT; 7016 data_list[i]->snd_count = 1; 7017 data_list[i]->rec.data.chunk_was_revoked = 0; 7018 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 7019 sctp_misc_ints(SCTP_FLIGHT_LOG_UP, 7020 data_list[i]->whoTo->flight_size, 7021 data_list[i]->book_size, 7022 (uintptr_t) data_list[i]->whoTo, 7023 data_list[i]->rec.data.TSN_seq); 7024 } 7025 sctp_flight_size_increase(data_list[i]); 7026 sctp_total_flight_increase(stcb, data_list[i]); 7027 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 7028 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 7029 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 7030 } 7031 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 7032 (uint32_t) (data_list[i]->send_size + SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 7033 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 7034 /* SWS sender side engages */ 7035 asoc->peers_rwnd = 0; 7036 } 7037 } 7038 if (asoc->cc_functions.sctp_cwnd_update_packet_transmitted) { 7039 (*asoc->cc_functions.sctp_cwnd_update_packet_transmitted) (stcb, net); 7040 } 7041} 7042 7043static void 7044sctp_clean_up_ctl(struct sctp_tcb *stcb, struct sctp_association *asoc, int so_locked 7045#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7046 SCTP_UNUSED 7047#endif 7048) 7049{ 7050 struct sctp_tmit_chunk *chk, *nchk; 7051 7052 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 7053 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7054 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 7055 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 7056 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 7057 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) || 7058 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 7059 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 7060 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 7061 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 7062 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 7063 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 7064 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 7065 /* Stray chunks must be cleaned up */ 7066 clean_up_anyway: 7067 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 7068 if (chk->data) { 7069 sctp_m_freem(chk->data); 7070 chk->data = NULL; 7071 } 7072 asoc->ctrl_queue_cnt--; 7073 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) 7074 asoc->fwd_tsn_cnt--; 7075 sctp_free_a_chunk(stcb, chk, so_locked); 7076 } else if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 7077 /* special handling, we must look into the param */ 7078 if (chk != asoc->str_reset) { 7079 goto clean_up_anyway; 7080 } 7081 } 7082 } 7083} 7084 7085 7086static int 7087sctp_can_we_split_this(struct sctp_tcb *stcb, 7088 uint32_t length, 7089 uint32_t goal_mtu, uint32_t frag_point, int eeor_on) 7090{ 7091 /* 7092 * Make a decision on if I should split a msg into multiple parts. 7093 * This is only asked of incomplete messages. 7094 */ 7095 if (eeor_on) { 7096 /* 7097 * If we are doing EEOR we need to always send it if its the 7098 * entire thing, since it might be all the guy is putting in 7099 * the hopper. 7100 */ 7101 if (goal_mtu >= length) { 7102 /*- 7103 * If we have data outstanding, 7104 * we get another chance when the sack 7105 * arrives to transmit - wait for more data 7106 */ 7107 if (stcb->asoc.total_flight == 0) { 7108 /* 7109 * If nothing is in flight, we zero the 7110 * packet counter. 7111 */ 7112 return (length); 7113 } 7114 return (0); 7115 7116 } else { 7117 /* You can fill the rest */ 7118 return (goal_mtu); 7119 } 7120 } 7121 /*- 7122 * For those strange folk that make the send buffer 7123 * smaller than our fragmentation point, we can't 7124 * get a full msg in so we have to allow splitting. 7125 */ 7126 if (SCTP_SB_LIMIT_SND(stcb->sctp_socket) < frag_point) { 7127 return (length); 7128 } 7129 if ((length <= goal_mtu) || 7130 ((length - goal_mtu) < SCTP_BASE_SYSCTL(sctp_min_residual))) { 7131 /* Sub-optimial residual don't split in non-eeor mode. */ 7132 return (0); 7133 } 7134 /* 7135 * If we reach here length is larger than the goal_mtu. Do we wish 7136 * to split it for the sake of packet putting together? 7137 */ 7138 if (goal_mtu >= min(SCTP_BASE_SYSCTL(sctp_min_split_point), frag_point)) { 7139 /* Its ok to split it */ 7140 return (min(goal_mtu, frag_point)); 7141 } 7142 /* Nope, can't split */ 7143 return (0); 7144 7145} 7146 7147static uint32_t 7148sctp_move_to_outqueue(struct sctp_tcb *stcb, 7149 struct sctp_stream_out *strq, 7150 uint32_t goal_mtu, 7151 uint32_t frag_point, 7152 int *locked, 7153 int *giveup, 7154 int eeor_mode, 7155 int *bail, 7156 int so_locked 7157#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7158 SCTP_UNUSED 7159#endif 7160) 7161{ 7162 /* Move from the stream to the send_queue keeping track of the total */ 7163 struct sctp_association *asoc; 7164 struct sctp_stream_queue_pending *sp; 7165 struct sctp_tmit_chunk *chk; 7166 struct sctp_data_chunk *dchkh; 7167 uint32_t to_move, length; 7168 uint8_t rcv_flags = 0; 7169 uint8_t some_taken; 7170 uint8_t send_lock_up = 0; 7171 7172 SCTP_TCB_LOCK_ASSERT(stcb); 7173 asoc = &stcb->asoc; 7174one_more_time: 7175 /* sa_ignore FREED_MEMORY */ 7176 sp = TAILQ_FIRST(&strq->outqueue); 7177 if (sp == NULL) { 7178 *locked = 0; 7179 if (send_lock_up == 0) { 7180 SCTP_TCB_SEND_LOCK(stcb); 7181 send_lock_up = 1; 7182 } 7183 sp = TAILQ_FIRST(&strq->outqueue); 7184 if (sp) { 7185 goto one_more_time; 7186 } 7187 if (strq->last_msg_incomplete) { 7188 SCTP_PRINTF("Huh? Stream:%d lm_in_c=%d but queue is NULL\n", 7189 strq->stream_no, 7190 strq->last_msg_incomplete); 7191 strq->last_msg_incomplete = 0; 7192 } 7193 to_move = 0; 7194 if (send_lock_up) { 7195 SCTP_TCB_SEND_UNLOCK(stcb); 7196 send_lock_up = 0; 7197 } 7198 goto out_of; 7199 } 7200 if ((sp->msg_is_complete) && (sp->length == 0)) { 7201 if (sp->sender_all_done) { 7202 /* 7203 * We are doing differed cleanup. Last time through 7204 * when we took all the data the sender_all_done was 7205 * not set. 7206 */ 7207 if ((sp->put_last_out == 0) && (sp->discard_rest == 0)) { 7208 SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n"); 7209 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7210 sp->sender_all_done, 7211 sp->length, 7212 sp->msg_is_complete, 7213 sp->put_last_out, 7214 send_lock_up); 7215 } 7216 if ((TAILQ_NEXT(sp, next) == NULL) && (send_lock_up == 0)) { 7217 SCTP_TCB_SEND_LOCK(stcb); 7218 send_lock_up = 1; 7219 } 7220 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7221 TAILQ_REMOVE(&strq->outqueue, sp, next); 7222 if ((strq->state == SCTP_STREAM_RESET_PENDING) && 7223 (strq->chunks_on_queues == 0) && 7224 TAILQ_EMPTY(&strq->outqueue)) { 7225 stcb->asoc.trigger_reset = 1; 7226 } 7227 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7228 if (sp->net) { 7229 sctp_free_remote_addr(sp->net); 7230 sp->net = NULL; 7231 } 7232 if (sp->data) { 7233 sctp_m_freem(sp->data); 7234 sp->data = NULL; 7235 } 7236 sctp_free_a_strmoq(stcb, sp, so_locked); 7237 /* we can't be locked to it */ 7238 *locked = 0; 7239 stcb->asoc.locked_on_sending = NULL; 7240 if (send_lock_up) { 7241 SCTP_TCB_SEND_UNLOCK(stcb); 7242 send_lock_up = 0; 7243 } 7244 /* back to get the next msg */ 7245 goto one_more_time; 7246 } else { 7247 /* 7248 * sender just finished this but still holds a 7249 * reference 7250 */ 7251 *locked = 1; 7252 *giveup = 1; 7253 to_move = 0; 7254 goto out_of; 7255 } 7256 } else { 7257 /* is there some to get */ 7258 if (sp->length == 0) { 7259 /* no */ 7260 *locked = 1; 7261 *giveup = 1; 7262 to_move = 0; 7263 goto out_of; 7264 } else if (sp->discard_rest) { 7265 if (send_lock_up == 0) { 7266 SCTP_TCB_SEND_LOCK(stcb); 7267 send_lock_up = 1; 7268 } 7269 /* Whack down the size */ 7270 atomic_subtract_int(&stcb->asoc.total_output_queue_size, sp->length); 7271 if ((stcb->sctp_socket != NULL) && 7272 ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 7273 (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) { 7274 atomic_subtract_int(&stcb->sctp_socket->so_snd.sb_cc, sp->length); 7275 } 7276 if (sp->data) { 7277 sctp_m_freem(sp->data); 7278 sp->data = NULL; 7279 sp->tail_mbuf = NULL; 7280 } 7281 sp->length = 0; 7282 sp->some_taken = 1; 7283 *locked = 1; 7284 *giveup = 1; 7285 to_move = 0; 7286 goto out_of; 7287 } 7288 } 7289 some_taken = sp->some_taken; 7290re_look: 7291 length = sp->length; 7292 if (sp->msg_is_complete) { 7293 /* The message is complete */ 7294 to_move = min(length, frag_point); 7295 if (to_move == length) { 7296 /* All of it fits in the MTU */ 7297 if (sp->some_taken) { 7298 rcv_flags |= SCTP_DATA_LAST_FRAG; 7299 sp->put_last_out = 1; 7300 } else { 7301 rcv_flags |= SCTP_DATA_NOT_FRAG; 7302 sp->put_last_out = 1; 7303 } 7304 } else { 7305 /* Not all of it fits, we fragment */ 7306 if (sp->some_taken == 0) { 7307 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7308 } 7309 sp->some_taken = 1; 7310 } 7311 } else { 7312 to_move = sctp_can_we_split_this(stcb, length, goal_mtu, frag_point, eeor_mode); 7313 if (to_move) { 7314 /*- 7315 * We use a snapshot of length in case it 7316 * is expanding during the compare. 7317 */ 7318 uint32_t llen; 7319 7320 llen = length; 7321 if (to_move >= llen) { 7322 to_move = llen; 7323 if (send_lock_up == 0) { 7324 /*- 7325 * We are taking all of an incomplete msg 7326 * thus we need a send lock. 7327 */ 7328 SCTP_TCB_SEND_LOCK(stcb); 7329 send_lock_up = 1; 7330 if (sp->msg_is_complete) { 7331 /* 7332 * the sender finished the 7333 * msg 7334 */ 7335 goto re_look; 7336 } 7337 } 7338 } 7339 if (sp->some_taken == 0) { 7340 rcv_flags |= SCTP_DATA_FIRST_FRAG; 7341 sp->some_taken = 1; 7342 } 7343 } else { 7344 /* Nothing to take. */ 7345 if (sp->some_taken) { 7346 *locked = 1; 7347 } 7348 *giveup = 1; 7349 to_move = 0; 7350 goto out_of; 7351 } 7352 } 7353 7354 /* If we reach here, we can copy out a chunk */ 7355 sctp_alloc_a_chunk(stcb, chk); 7356 if (chk == NULL) { 7357 /* No chunk memory */ 7358 *giveup = 1; 7359 to_move = 0; 7360 goto out_of; 7361 } 7362 /* 7363 * Setup for unordered if needed by looking at the user sent info 7364 * flags. 7365 */ 7366 if (sp->sinfo_flags & SCTP_UNORDERED) { 7367 rcv_flags |= SCTP_DATA_UNORDERED; 7368 } 7369 if ((SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && ((sp->sinfo_flags & SCTP_EOF) == SCTP_EOF)) || 7370 ((sp->sinfo_flags & SCTP_SACK_IMMEDIATELY) == SCTP_SACK_IMMEDIATELY)) { 7371 rcv_flags |= SCTP_DATA_SACK_IMMEDIATELY; 7372 } 7373 /* clear out the chunk before setting up */ 7374 memset(chk, 0, sizeof(*chk)); 7375 chk->rec.data.rcv_flags = rcv_flags; 7376 7377 if (to_move >= length) { 7378 /* we think we can steal the whole thing */ 7379 if ((sp->sender_all_done == 0) && (send_lock_up == 0)) { 7380 SCTP_TCB_SEND_LOCK(stcb); 7381 send_lock_up = 1; 7382 } 7383 if (to_move < sp->length) { 7384 /* bail, it changed */ 7385 goto dont_do_it; 7386 } 7387 chk->data = sp->data; 7388 chk->last_mbuf = sp->tail_mbuf; 7389 /* register the stealing */ 7390 sp->data = sp->tail_mbuf = NULL; 7391 } else { 7392 struct mbuf *m; 7393 7394dont_do_it: 7395 chk->data = SCTP_M_COPYM(sp->data, 0, to_move, M_NOWAIT); 7396 chk->last_mbuf = NULL; 7397 if (chk->data == NULL) { 7398 sp->some_taken = some_taken; 7399 sctp_free_a_chunk(stcb, chk, so_locked); 7400 *bail = 1; 7401 to_move = 0; 7402 goto out_of; 7403 } 7404#ifdef SCTP_MBUF_LOGGING 7405 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 7406 sctp_log_mbc(chk->data, SCTP_MBUF_ICOPY); 7407 } 7408#endif 7409 /* Pull off the data */ 7410 m_adj(sp->data, to_move); 7411 /* Now lets work our way down and compact it */ 7412 m = sp->data; 7413 while (m && (SCTP_BUF_LEN(m) == 0)) { 7414 sp->data = SCTP_BUF_NEXT(m); 7415 SCTP_BUF_NEXT(m) = NULL; 7416 if (sp->tail_mbuf == m) { 7417 /*- 7418 * Freeing tail? TSNH since 7419 * we supposedly were taking less 7420 * than the sp->length. 7421 */ 7422#ifdef INVARIANTS 7423 panic("Huh, freing tail? - TSNH"); 7424#else 7425 SCTP_PRINTF("Huh, freeing tail? - TSNH\n"); 7426 sp->tail_mbuf = sp->data = NULL; 7427 sp->length = 0; 7428#endif 7429 7430 } 7431 sctp_m_free(m); 7432 m = sp->data; 7433 } 7434 } 7435 if (SCTP_BUF_IS_EXTENDED(chk->data)) { 7436 chk->copy_by_ref = 1; 7437 } else { 7438 chk->copy_by_ref = 0; 7439 } 7440 /* 7441 * get last_mbuf and counts of mb useage This is ugly but hopefully 7442 * its only one mbuf. 7443 */ 7444 if (chk->last_mbuf == NULL) { 7445 chk->last_mbuf = chk->data; 7446 while (SCTP_BUF_NEXT(chk->last_mbuf) != NULL) { 7447 chk->last_mbuf = SCTP_BUF_NEXT(chk->last_mbuf); 7448 } 7449 } 7450 if (to_move > length) { 7451 /*- This should not happen either 7452 * since we always lower to_move to the size 7453 * of sp->length if its larger. 7454 */ 7455#ifdef INVARIANTS 7456 panic("Huh, how can to_move be larger?"); 7457#else 7458 SCTP_PRINTF("Huh, how can to_move be larger?\n"); 7459 sp->length = 0; 7460#endif 7461 } else { 7462 atomic_subtract_int(&sp->length, to_move); 7463 } 7464 if (M_LEADINGSPACE(chk->data) < (int)sizeof(struct sctp_data_chunk)) { 7465 /* Not enough room for a chunk header, get some */ 7466 struct mbuf *m; 7467 7468 m = sctp_get_mbuf_for_msg(1, 0, M_NOWAIT, 0, MT_DATA); 7469 if (m == NULL) { 7470 /* 7471 * we're in trouble here. _PREPEND below will free 7472 * all the data if there is no leading space, so we 7473 * must put the data back and restore. 7474 */ 7475 if (send_lock_up == 0) { 7476 SCTP_TCB_SEND_LOCK(stcb); 7477 send_lock_up = 1; 7478 } 7479 if (sp->data == NULL) { 7480 /* unsteal the data */ 7481 sp->data = chk->data; 7482 sp->tail_mbuf = chk->last_mbuf; 7483 } else { 7484 struct mbuf *m_tmp; 7485 7486 /* reassemble the data */ 7487 m_tmp = sp->data; 7488 sp->data = chk->data; 7489 SCTP_BUF_NEXT(chk->last_mbuf) = m_tmp; 7490 } 7491 sp->some_taken = some_taken; 7492 atomic_add_int(&sp->length, to_move); 7493 chk->data = NULL; 7494 *bail = 1; 7495 sctp_free_a_chunk(stcb, chk, so_locked); 7496 to_move = 0; 7497 goto out_of; 7498 } else { 7499 SCTP_BUF_LEN(m) = 0; 7500 SCTP_BUF_NEXT(m) = chk->data; 7501 chk->data = m; 7502 M_ALIGN(chk->data, 4); 7503 } 7504 } 7505 SCTP_BUF_PREPEND(chk->data, sizeof(struct sctp_data_chunk), M_NOWAIT); 7506 if (chk->data == NULL) { 7507 /* HELP, TSNH since we assured it would not above? */ 7508#ifdef INVARIANTS 7509 panic("prepend failes HELP?"); 7510#else 7511 SCTP_PRINTF("prepend fails HELP?\n"); 7512 sctp_free_a_chunk(stcb, chk, so_locked); 7513#endif 7514 *bail = 1; 7515 to_move = 0; 7516 goto out_of; 7517 } 7518 sctp_snd_sb_alloc(stcb, sizeof(struct sctp_data_chunk)); 7519 chk->book_size = chk->send_size = (to_move + sizeof(struct sctp_data_chunk)); 7520 chk->book_size_scale = 0; 7521 chk->sent = SCTP_DATAGRAM_UNSENT; 7522 7523 chk->flags = 0; 7524 chk->asoc = &stcb->asoc; 7525 chk->pad_inplace = 0; 7526 chk->no_fr_allowed = 0; 7527 chk->rec.data.stream_seq = strq->next_sequence_send; 7528 if ((rcv_flags & SCTP_DATA_LAST_FRAG) && 7529 !(rcv_flags & SCTP_DATA_UNORDERED)) { 7530 strq->next_sequence_send++; 7531 } 7532 chk->rec.data.stream_number = sp->stream; 7533 chk->rec.data.payloadtype = sp->ppid; 7534 chk->rec.data.context = sp->context; 7535 chk->rec.data.doing_fast_retransmit = 0; 7536 7537 chk->rec.data.timetodrop = sp->ts; 7538 chk->flags = sp->act_flags; 7539 7540 if (sp->net) { 7541 chk->whoTo = sp->net; 7542 atomic_add_int(&chk->whoTo->ref_count, 1); 7543 } else 7544 chk->whoTo = NULL; 7545 7546 if (sp->holds_key_ref) { 7547 chk->auth_keyid = sp->auth_keyid; 7548 sctp_auth_key_acquire(stcb, chk->auth_keyid); 7549 chk->holds_key_ref = 1; 7550 } 7551 chk->rec.data.TSN_seq = atomic_fetchadd_int(&asoc->sending_seq, 1); 7552 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_AT_SEND_2_OUTQ) { 7553 sctp_misc_ints(SCTP_STRMOUT_LOG_SEND, 7554 (uintptr_t) stcb, sp->length, 7555 (uint32_t) ((chk->rec.data.stream_number << 16) | chk->rec.data.stream_seq), 7556 chk->rec.data.TSN_seq); 7557 } 7558 dchkh = mtod(chk->data, struct sctp_data_chunk *); 7559 /* 7560 * Put the rest of the things in place now. Size was done earlier in 7561 * previous loop prior to padding. 7562 */ 7563 7564#ifdef SCTP_ASOCLOG_OF_TSNS 7565 SCTP_TCB_LOCK_ASSERT(stcb); 7566 if (asoc->tsn_out_at >= SCTP_TSN_LOG_SIZE) { 7567 asoc->tsn_out_at = 0; 7568 asoc->tsn_out_wrapped = 1; 7569 } 7570 asoc->out_tsnlog[asoc->tsn_out_at].tsn = chk->rec.data.TSN_seq; 7571 asoc->out_tsnlog[asoc->tsn_out_at].strm = chk->rec.data.stream_number; 7572 asoc->out_tsnlog[asoc->tsn_out_at].seq = chk->rec.data.stream_seq; 7573 asoc->out_tsnlog[asoc->tsn_out_at].sz = chk->send_size; 7574 asoc->out_tsnlog[asoc->tsn_out_at].flgs = chk->rec.data.rcv_flags; 7575 asoc->out_tsnlog[asoc->tsn_out_at].stcb = (void *)stcb; 7576 asoc->out_tsnlog[asoc->tsn_out_at].in_pos = asoc->tsn_out_at; 7577 asoc->out_tsnlog[asoc->tsn_out_at].in_out = 2; 7578 asoc->tsn_out_at++; 7579#endif 7580 7581 dchkh->ch.chunk_type = SCTP_DATA; 7582 dchkh->ch.chunk_flags = chk->rec.data.rcv_flags; 7583 dchkh->dp.tsn = htonl(chk->rec.data.TSN_seq); 7584 dchkh->dp.stream_id = htons(strq->stream_no); 7585 dchkh->dp.stream_sequence = htons(chk->rec.data.stream_seq); 7586 dchkh->dp.protocol_id = chk->rec.data.payloadtype; 7587 dchkh->ch.chunk_length = htons(chk->send_size); 7588 /* Now advance the chk->send_size by the actual pad needed. */ 7589 if (chk->send_size < SCTP_SIZE32(chk->book_size)) { 7590 /* need a pad */ 7591 struct mbuf *lm; 7592 int pads; 7593 7594 pads = SCTP_SIZE32(chk->book_size) - chk->send_size; 7595 lm = sctp_pad_lastmbuf(chk->data, pads, chk->last_mbuf); 7596 if (lm != NULL) { 7597 chk->last_mbuf = lm; 7598 chk->pad_inplace = 1; 7599 } 7600 chk->send_size += pads; 7601 } 7602 if (PR_SCTP_ENABLED(chk->flags)) { 7603 asoc->pr_sctp_cnt++; 7604 } 7605 if (sp->msg_is_complete && (sp->length == 0) && (sp->sender_all_done)) { 7606 /* All done pull and kill the message */ 7607 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 7608 if (sp->put_last_out == 0) { 7609 SCTP_PRINTF("Gak, put out entire msg with NO end!-2\n"); 7610 SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d send_lock:%d\n", 7611 sp->sender_all_done, 7612 sp->length, 7613 sp->msg_is_complete, 7614 sp->put_last_out, 7615 send_lock_up); 7616 } 7617 if ((send_lock_up == 0) && (TAILQ_NEXT(sp, next) == NULL)) { 7618 SCTP_TCB_SEND_LOCK(stcb); 7619 send_lock_up = 1; 7620 } 7621 TAILQ_REMOVE(&strq->outqueue, sp, next); 7622 if ((strq->state == SCTP_STREAM_RESET_PENDING) && 7623 (strq->chunks_on_queues == 0) && 7624 TAILQ_EMPTY(&strq->outqueue)) { 7625 stcb->asoc.trigger_reset = 1; 7626 } 7627 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, strq, sp, send_lock_up); 7628 if (sp->net) { 7629 sctp_free_remote_addr(sp->net); 7630 sp->net = NULL; 7631 } 7632 if (sp->data) { 7633 sctp_m_freem(sp->data); 7634 sp->data = NULL; 7635 } 7636 sctp_free_a_strmoq(stcb, sp, so_locked); 7637 7638 /* we can't be locked to it */ 7639 *locked = 0; 7640 stcb->asoc.locked_on_sending = NULL; 7641 } else { 7642 /* more to go, we are locked */ 7643 *locked = 1; 7644 } 7645 asoc->chunks_on_out_queue++; 7646 strq->chunks_on_queues++; 7647 TAILQ_INSERT_TAIL(&asoc->send_queue, chk, sctp_next); 7648 asoc->send_queue_cnt++; 7649out_of: 7650 if (send_lock_up) { 7651 SCTP_TCB_SEND_UNLOCK(stcb); 7652 } 7653 return (to_move); 7654} 7655 7656 7657static void 7658sctp_fill_outqueue(struct sctp_tcb *stcb, 7659 struct sctp_nets *net, int frag_point, int eeor_mode, int *quit_now, int so_locked 7660#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7661 SCTP_UNUSED 7662#endif 7663) 7664{ 7665 struct sctp_association *asoc; 7666 struct sctp_stream_out *strq; 7667 int goal_mtu, moved_how_much, total_moved = 0, bail = 0; 7668 int locked, giveup; 7669 7670 SCTP_TCB_LOCK_ASSERT(stcb); 7671 asoc = &stcb->asoc; 7672 switch (net->ro._l_addr.sa.sa_family) { 7673#ifdef INET 7674 case AF_INET: 7675 goal_mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 7676 break; 7677#endif 7678#ifdef INET6 7679 case AF_INET6: 7680 goal_mtu = net->mtu - SCTP_MIN_OVERHEAD; 7681 break; 7682#endif 7683 default: 7684 /* TSNH */ 7685 goal_mtu = net->mtu; 7686 break; 7687 } 7688 /* Need an allowance for the data chunk header too */ 7689 goal_mtu -= sizeof(struct sctp_data_chunk); 7690 7691 /* must make even word boundary */ 7692 goal_mtu &= 0xfffffffc; 7693 if (asoc->locked_on_sending) { 7694 /* We are stuck on one stream until the message completes. */ 7695 strq = asoc->locked_on_sending; 7696 locked = 1; 7697 } else { 7698 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7699 locked = 0; 7700 } 7701 while ((goal_mtu > 0) && strq) { 7702 giveup = 0; 7703 bail = 0; 7704 moved_how_much = sctp_move_to_outqueue(stcb, strq, goal_mtu, frag_point, &locked, 7705 &giveup, eeor_mode, &bail, so_locked); 7706 if (moved_how_much) 7707 stcb->asoc.ss_functions.sctp_ss_scheduled(stcb, net, asoc, strq, moved_how_much); 7708 7709 if (locked) { 7710 asoc->locked_on_sending = strq; 7711 if ((moved_how_much == 0) || (giveup) || bail) 7712 /* no more to move for now */ 7713 break; 7714 } else { 7715 asoc->locked_on_sending = NULL; 7716 if ((giveup) || bail) { 7717 break; 7718 } 7719 strq = stcb->asoc.ss_functions.sctp_ss_select_stream(stcb, net, asoc); 7720 if (strq == NULL) { 7721 break; 7722 } 7723 } 7724 total_moved += moved_how_much; 7725 goal_mtu -= (moved_how_much + sizeof(struct sctp_data_chunk)); 7726 goal_mtu &= 0xfffffffc; 7727 } 7728 if (bail) 7729 *quit_now = 1; 7730 7731 stcb->asoc.ss_functions.sctp_ss_packet_done(stcb, net, asoc); 7732 7733 if (total_moved == 0) { 7734 if ((stcb->asoc.sctp_cmt_on_off == 0) && 7735 (net == stcb->asoc.primary_destination)) { 7736 /* ran dry for primary network net */ 7737 SCTP_STAT_INCR(sctps_primary_randry); 7738 } else if (stcb->asoc.sctp_cmt_on_off > 0) { 7739 /* ran dry with CMT on */ 7740 SCTP_STAT_INCR(sctps_cmt_randry); 7741 } 7742 } 7743} 7744 7745void 7746sctp_fix_ecn_echo(struct sctp_association *asoc) 7747{ 7748 struct sctp_tmit_chunk *chk; 7749 7750 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7751 if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 7752 chk->sent = SCTP_DATAGRAM_UNSENT; 7753 } 7754 } 7755} 7756 7757void 7758sctp_move_chunks_from_net(struct sctp_tcb *stcb, struct sctp_nets *net) 7759{ 7760 struct sctp_association *asoc; 7761 struct sctp_tmit_chunk *chk; 7762 struct sctp_stream_queue_pending *sp; 7763 unsigned int i; 7764 7765 if (net == NULL) { 7766 return; 7767 } 7768 asoc = &stcb->asoc; 7769 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 7770 TAILQ_FOREACH(sp, &stcb->asoc.strmout[i].outqueue, next) { 7771 if (sp->net == net) { 7772 sctp_free_remote_addr(sp->net); 7773 sp->net = NULL; 7774 } 7775 } 7776 } 7777 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7778 if (chk->whoTo == net) { 7779 sctp_free_remote_addr(chk->whoTo); 7780 chk->whoTo = NULL; 7781 } 7782 } 7783} 7784 7785int 7786sctp_med_chunk_output(struct sctp_inpcb *inp, 7787 struct sctp_tcb *stcb, 7788 struct sctp_association *asoc, 7789 int *num_out, 7790 int *reason_code, 7791 int control_only, int from_where, 7792 struct timeval *now, int *now_filled, int frag_point, int so_locked 7793#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 7794 SCTP_UNUSED 7795#endif 7796) 7797{ 7798 /** 7799 * Ok this is the generic chunk service queue. we must do the 7800 * following: - Service the stream queue that is next, moving any 7801 * message (note I must get a complete message i.e. FIRST/MIDDLE and 7802 * LAST to the out queue in one pass) and assigning TSN's - Check to 7803 * see if the cwnd/rwnd allows any output, if so we go ahead and 7804 * fomulate and send the low level chunks. Making sure to combine 7805 * any control in the control chunk queue also. 7806 */ 7807 struct sctp_nets *net, *start_at, *sack_goes_to = NULL, *old_start_at = NULL; 7808 struct mbuf *outchain, *endoutchain; 7809 struct sctp_tmit_chunk *chk, *nchk; 7810 7811 /* temp arrays for unlinking */ 7812 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 7813 int no_fragmentflg, error; 7814 unsigned int max_rwnd_per_dest, max_send_per_dest; 7815 int one_chunk, hbflag, skip_data_for_this_net; 7816 int asconf, cookie, no_out_cnt; 7817 int bundle_at, ctl_cnt, no_data_chunks, eeor_mode; 7818 unsigned int mtu, r_mtu, omtu, mx_mtu, to_out; 7819 int tsns_sent = 0; 7820 uint32_t auth_offset = 0; 7821 struct sctp_auth_chunk *auth = NULL; 7822 uint16_t auth_keyid; 7823 int override_ok = 1; 7824 int skip_fill_up = 0; 7825 int data_auth_reqd = 0; 7826 7827 /* 7828 * JRS 5/14/07 - Add flag for whether a heartbeat is sent to the 7829 * destination. 7830 */ 7831 int quit_now = 0; 7832 7833 *num_out = 0; 7834 *reason_code = 0; 7835 auth_keyid = stcb->asoc.authinfo.active_keyid; 7836 if ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) || 7837 (asoc->state & SCTP_STATE_SHUTDOWN_RECEIVED) || 7838 (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 7839 eeor_mode = 1; 7840 } else { 7841 eeor_mode = 0; 7842 } 7843 ctl_cnt = no_out_cnt = asconf = cookie = 0; 7844 /* 7845 * First lets prime the pump. For each destination, if there is room 7846 * in the flight size, attempt to pull an MTU's worth out of the 7847 * stream queues into the general send_queue 7848 */ 7849#ifdef SCTP_AUDITING_ENABLED 7850 sctp_audit_log(0xC2, 2); 7851#endif 7852 SCTP_TCB_LOCK_ASSERT(stcb); 7853 hbflag = 0; 7854 if (control_only) 7855 no_data_chunks = 1; 7856 else 7857 no_data_chunks = 0; 7858 7859 /* Nothing to possible to send? */ 7860 if ((TAILQ_EMPTY(&asoc->control_send_queue) || 7861 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) && 7862 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7863 TAILQ_EMPTY(&asoc->send_queue) && 7864 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 7865nothing_to_send: 7866 *reason_code = 9; 7867 return (0); 7868 } 7869 if (asoc->peers_rwnd == 0) { 7870 /* No room in peers rwnd */ 7871 *reason_code = 1; 7872 if (asoc->total_flight > 0) { 7873 /* we are allowed one chunk in flight */ 7874 no_data_chunks = 1; 7875 } 7876 } 7877 if (stcb->asoc.ecn_echo_cnt_onq) { 7878 /* Record where a sack goes, if any */ 7879 if (no_data_chunks && 7880 (asoc->ctrl_queue_cnt == stcb->asoc.ecn_echo_cnt_onq)) { 7881 /* Nothing but ECNe to send - we don't do that */ 7882 goto nothing_to_send; 7883 } 7884 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7885 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 7886 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 7887 sack_goes_to = chk->whoTo; 7888 break; 7889 } 7890 } 7891 } 7892 max_rwnd_per_dest = ((asoc->peers_rwnd + asoc->total_flight) / asoc->numnets); 7893 if (stcb->sctp_socket) 7894 max_send_per_dest = SCTP_SB_LIMIT_SND(stcb->sctp_socket) / asoc->numnets; 7895 else 7896 max_send_per_dest = 0; 7897 if (no_data_chunks == 0) { 7898 /* How many non-directed chunks are there? */ 7899 TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) { 7900 if (chk->whoTo == NULL) { 7901 /* 7902 * We already have non-directed chunks on 7903 * the queue, no need to do a fill-up. 7904 */ 7905 skip_fill_up = 1; 7906 break; 7907 } 7908 } 7909 7910 } 7911 if ((no_data_chunks == 0) && 7912 (skip_fill_up == 0) && 7913 (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc))) { 7914 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 7915 /* 7916 * This for loop we are in takes in each net, if 7917 * its's got space in cwnd and has data sent to it 7918 * (when CMT is off) then it calls 7919 * sctp_fill_outqueue for the net. This gets data on 7920 * the send queue for that network. 7921 * 7922 * In sctp_fill_outqueue TSN's are assigned and data is 7923 * copied out of the stream buffers. Note mostly 7924 * copy by reference (we hope). 7925 */ 7926 net->window_probe = 0; 7927 if ((net != stcb->asoc.alternate) && 7928 ((net->dest_state & SCTP_ADDR_PF) || 7929 (!(net->dest_state & SCTP_ADDR_REACHABLE)) || 7930 (net->dest_state & SCTP_ADDR_UNCONFIRMED))) { 7931 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7932 sctp_log_cwnd(stcb, net, 1, 7933 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7934 } 7935 continue; 7936 } 7937 if ((stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) && 7938 (net->flight_size == 0)) { 7939 (*stcb->asoc.cc_functions.sctp_cwnd_new_transmission_begins) (stcb, net); 7940 } 7941 if (net->flight_size >= net->cwnd) { 7942 /* skip this network, no room - can't fill */ 7943 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7944 sctp_log_cwnd(stcb, net, 3, 7945 SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7946 } 7947 continue; 7948 } 7949 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 7950 sctp_log_cwnd(stcb, net, 4, SCTP_CWND_LOG_FILL_OUTQ_CALLED); 7951 } 7952 sctp_fill_outqueue(stcb, net, frag_point, eeor_mode, &quit_now, so_locked); 7953 if (quit_now) { 7954 /* memory alloc failure */ 7955 no_data_chunks = 1; 7956 break; 7957 } 7958 } 7959 } 7960 /* now service each destination and send out what we can for it */ 7961 /* Nothing to send? */ 7962 if (TAILQ_EMPTY(&asoc->control_send_queue) && 7963 TAILQ_EMPTY(&asoc->asconf_send_queue) && 7964 TAILQ_EMPTY(&asoc->send_queue)) { 7965 *reason_code = 8; 7966 return (0); 7967 } 7968 if (asoc->sctp_cmt_on_off > 0) { 7969 /* get the last start point */ 7970 start_at = asoc->last_net_cmt_send_started; 7971 if (start_at == NULL) { 7972 /* null so to beginning */ 7973 start_at = TAILQ_FIRST(&asoc->nets); 7974 } else { 7975 start_at = TAILQ_NEXT(asoc->last_net_cmt_send_started, sctp_next); 7976 if (start_at == NULL) { 7977 start_at = TAILQ_FIRST(&asoc->nets); 7978 } 7979 } 7980 asoc->last_net_cmt_send_started = start_at; 7981 } else { 7982 start_at = TAILQ_FIRST(&asoc->nets); 7983 } 7984 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 7985 if (chk->whoTo == NULL) { 7986 if (asoc->alternate) { 7987 chk->whoTo = asoc->alternate; 7988 } else { 7989 chk->whoTo = asoc->primary_destination; 7990 } 7991 atomic_add_int(&chk->whoTo->ref_count, 1); 7992 } 7993 } 7994 old_start_at = NULL; 7995again_one_more_time: 7996 for (net = start_at; net != NULL; net = TAILQ_NEXT(net, sctp_next)) { 7997 /* how much can we send? */ 7998 /* SCTPDBG("Examine for sending net:%x\n", (uint32_t)net); */ 7999 if (old_start_at && (old_start_at == net)) { 8000 /* through list ocmpletely. */ 8001 break; 8002 } 8003 tsns_sent = 0xa; 8004 if (TAILQ_EMPTY(&asoc->control_send_queue) && 8005 TAILQ_EMPTY(&asoc->asconf_send_queue) && 8006 (net->flight_size >= net->cwnd)) { 8007 /* 8008 * Nothing on control or asconf and flight is full, 8009 * we can skip even in the CMT case. 8010 */ 8011 continue; 8012 } 8013 bundle_at = 0; 8014 endoutchain = outchain = NULL; 8015 no_fragmentflg = 1; 8016 one_chunk = 0; 8017 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 8018 skip_data_for_this_net = 1; 8019 } else { 8020 skip_data_for_this_net = 0; 8021 } 8022 if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { 8023 /* 8024 * if we have a route and an ifp check to see if we 8025 * have room to send to this guy 8026 */ 8027 struct ifnet *ifp; 8028 8029 ifp = net->ro.ro_rt->rt_ifp; 8030 if ((ifp->if_snd.ifq_len + 2) >= ifp->if_snd.ifq_maxlen) { 8031 SCTP_STAT_INCR(sctps_ifnomemqueued); 8032 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 8033 sctp_log_maxburst(stcb, net, ifp->if_snd.ifq_len, ifp->if_snd.ifq_maxlen, SCTP_MAX_IFP_APPLIED); 8034 } 8035 continue; 8036 } 8037 } 8038 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8039#ifdef INET 8040 case AF_INET: 8041 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8042 break; 8043#endif 8044#ifdef INET6 8045 case AF_INET6: 8046 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8047 break; 8048#endif 8049 default: 8050 /* TSNH */ 8051 mtu = net->mtu; 8052 break; 8053 } 8054 mx_mtu = mtu; 8055 to_out = 0; 8056 if (mtu > asoc->peers_rwnd) { 8057 if (asoc->total_flight > 0) { 8058 /* We have a packet in flight somewhere */ 8059 r_mtu = asoc->peers_rwnd; 8060 } else { 8061 /* We are always allowed to send one MTU out */ 8062 one_chunk = 1; 8063 r_mtu = mtu; 8064 } 8065 } else { 8066 r_mtu = mtu; 8067 } 8068 error = 0; 8069 /************************/ 8070 /* ASCONF transmission */ 8071 /************************/ 8072 /* Now first lets go through the asconf queue */ 8073 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 8074 if (chk->rec.chunk_id.id != SCTP_ASCONF) { 8075 continue; 8076 } 8077 if (chk->whoTo == NULL) { 8078 if (asoc->alternate == NULL) { 8079 if (asoc->primary_destination != net) { 8080 break; 8081 } 8082 } else { 8083 if (asoc->alternate != net) { 8084 break; 8085 } 8086 } 8087 } else { 8088 if (chk->whoTo != net) { 8089 break; 8090 } 8091 } 8092 if (chk->data == NULL) { 8093 break; 8094 } 8095 if (chk->sent != SCTP_DATAGRAM_UNSENT && 8096 chk->sent != SCTP_DATAGRAM_RESEND) { 8097 break; 8098 } 8099 /* 8100 * if no AUTH is yet included and this chunk 8101 * requires it, make sure to account for it. We 8102 * don't apply the size until the AUTH chunk is 8103 * actually added below in case there is no room for 8104 * this chunk. NOTE: we overload the use of "omtu" 8105 * here 8106 */ 8107 if ((auth == NULL) && 8108 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8109 stcb->asoc.peer_auth_chunks)) { 8110 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8111 } else 8112 omtu = 0; 8113 /* Here we do NOT factor the r_mtu */ 8114 if ((chk->send_size < (int)(mtu - omtu)) || 8115 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8116 /* 8117 * We probably should glom the mbuf chain 8118 * from the chk->data for control but the 8119 * problem is it becomes yet one more level 8120 * of tracking to do if for some reason 8121 * output fails. Then I have got to 8122 * reconstruct the merged control chain.. el 8123 * yucko.. for now we take the easy way and 8124 * do the copy 8125 */ 8126 /* 8127 * Add an AUTH chunk, if chunk requires it 8128 * save the offset into the chain for AUTH 8129 */ 8130 if ((auth == NULL) && 8131 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8132 stcb->asoc.peer_auth_chunks))) { 8133 outchain = sctp_add_auth_chunk(outchain, 8134 &endoutchain, 8135 &auth, 8136 &auth_offset, 8137 stcb, 8138 chk->rec.chunk_id.id); 8139 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8140 } 8141 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8142 (int)chk->rec.chunk_id.can_take_data, 8143 chk->send_size, chk->copy_by_ref); 8144 if (outchain == NULL) { 8145 *reason_code = 8; 8146 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8147 return (ENOMEM); 8148 } 8149 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8150 /* update our MTU size */ 8151 if (mtu > (chk->send_size + omtu)) 8152 mtu -= (chk->send_size + omtu); 8153 else 8154 mtu = 0; 8155 to_out += (chk->send_size + omtu); 8156 /* Do clear IP_DF ? */ 8157 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8158 no_fragmentflg = 0; 8159 } 8160 if (chk->rec.chunk_id.can_take_data) 8161 chk->data = NULL; 8162 /* 8163 * set hb flag since we can use these for 8164 * RTO 8165 */ 8166 hbflag = 1; 8167 asconf = 1; 8168 /* 8169 * should sysctl this: don't bundle data 8170 * with ASCONF since it requires AUTH 8171 */ 8172 no_data_chunks = 1; 8173 chk->sent = SCTP_DATAGRAM_SENT; 8174 if (chk->whoTo == NULL) { 8175 chk->whoTo = net; 8176 atomic_add_int(&net->ref_count, 1); 8177 } 8178 chk->snd_count++; 8179 if (mtu == 0) { 8180 /* 8181 * Ok we are out of room but we can 8182 * output without effecting the 8183 * flight size since this little guy 8184 * is a control only packet. 8185 */ 8186 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8187 /* 8188 * do NOT clear the asconf flag as 8189 * it is used to do appropriate 8190 * source address selection. 8191 */ 8192 if (*now_filled == 0) { 8193 (void)SCTP_GETTIME_TIMEVAL(now); 8194 *now_filled = 1; 8195 } 8196 net->last_sent_time = *now; 8197 hbflag = 0; 8198 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8199 (struct sockaddr *)&net->ro._l_addr, 8200 outchain, auth_offset, auth, 8201 stcb->asoc.authinfo.active_keyid, 8202 no_fragmentflg, 0, asconf, 8203 inp->sctp_lport, stcb->rport, 8204 htonl(stcb->asoc.peer_vtag), 8205 net->port, NULL, 8206 0, 0, 8207 so_locked))) { 8208 /* 8209 * error, we could not 8210 * output 8211 */ 8212 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8213 if (from_where == 0) { 8214 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8215 } 8216 if (error == ENOBUFS) { 8217 asoc->ifp_had_enobuf = 1; 8218 SCTP_STAT_INCR(sctps_lowlevelerr); 8219 } 8220 /* error, could not output */ 8221 if (error == EHOSTUNREACH) { 8222 /* 8223 * Destination went 8224 * unreachable 8225 * during this send 8226 */ 8227 sctp_move_chunks_from_net(stcb, net); 8228 } 8229 *reason_code = 7; 8230 break; 8231 } else { 8232 asoc->ifp_had_enobuf = 0; 8233 } 8234 /* 8235 * increase the number we sent, if a 8236 * cookie is sent we don't tell them 8237 * any was sent out. 8238 */ 8239 outchain = endoutchain = NULL; 8240 auth = NULL; 8241 auth_offset = 0; 8242 if (!no_out_cnt) 8243 *num_out += ctl_cnt; 8244 /* recalc a clean slate and setup */ 8245 switch (net->ro._l_addr.sa.sa_family) { 8246#ifdef INET 8247 case AF_INET: 8248 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8249 break; 8250#endif 8251#ifdef INET6 8252 case AF_INET6: 8253 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8254 break; 8255#endif 8256 default: 8257 /* TSNH */ 8258 mtu = net->mtu; 8259 break; 8260 } 8261 to_out = 0; 8262 no_fragmentflg = 1; 8263 } 8264 } 8265 } 8266 if (error != 0) { 8267 /* try next net */ 8268 continue; 8269 } 8270 /************************/ 8271 /* Control transmission */ 8272 /************************/ 8273 /* Now first lets go through the control queue */ 8274 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 8275 if ((sack_goes_to) && 8276 (chk->rec.chunk_id.id == SCTP_ECN_ECHO) && 8277 (chk->whoTo != sack_goes_to)) { 8278 /* 8279 * if we have a sack in queue, and we are 8280 * looking at an ecn echo that is NOT queued 8281 * to where the sack is going.. 8282 */ 8283 if (chk->whoTo == net) { 8284 /* 8285 * Don't transmit it to where its 8286 * going (current net) 8287 */ 8288 continue; 8289 } else if (sack_goes_to == net) { 8290 /* 8291 * But do transmit it to this 8292 * address 8293 */ 8294 goto skip_net_check; 8295 } 8296 } 8297 if (chk->whoTo == NULL) { 8298 if (asoc->alternate == NULL) { 8299 if (asoc->primary_destination != net) { 8300 continue; 8301 } 8302 } else { 8303 if (asoc->alternate != net) { 8304 continue; 8305 } 8306 } 8307 } else { 8308 if (chk->whoTo != net) { 8309 continue; 8310 } 8311 } 8312 skip_net_check: 8313 if (chk->data == NULL) { 8314 continue; 8315 } 8316 if (chk->sent != SCTP_DATAGRAM_UNSENT) { 8317 /* 8318 * It must be unsent. Cookies and ASCONF's 8319 * hang around but there timers will force 8320 * when marked for resend. 8321 */ 8322 continue; 8323 } 8324 /* 8325 * if no AUTH is yet included and this chunk 8326 * requires it, make sure to account for it. We 8327 * don't apply the size until the AUTH chunk is 8328 * actually added below in case there is no room for 8329 * this chunk. NOTE: we overload the use of "omtu" 8330 * here 8331 */ 8332 if ((auth == NULL) && 8333 sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8334 stcb->asoc.peer_auth_chunks)) { 8335 omtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8336 } else 8337 omtu = 0; 8338 /* Here we do NOT factor the r_mtu */ 8339 if ((chk->send_size <= (int)(mtu - omtu)) || 8340 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 8341 /* 8342 * We probably should glom the mbuf chain 8343 * from the chk->data for control but the 8344 * problem is it becomes yet one more level 8345 * of tracking to do if for some reason 8346 * output fails. Then I have got to 8347 * reconstruct the merged control chain.. el 8348 * yucko.. for now we take the easy way and 8349 * do the copy 8350 */ 8351 /* 8352 * Add an AUTH chunk, if chunk requires it 8353 * save the offset into the chain for AUTH 8354 */ 8355 if ((auth == NULL) && 8356 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 8357 stcb->asoc.peer_auth_chunks))) { 8358 outchain = sctp_add_auth_chunk(outchain, 8359 &endoutchain, 8360 &auth, 8361 &auth_offset, 8362 stcb, 8363 chk->rec.chunk_id.id); 8364 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8365 } 8366 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 8367 (int)chk->rec.chunk_id.can_take_data, 8368 chk->send_size, chk->copy_by_ref); 8369 if (outchain == NULL) { 8370 *reason_code = 8; 8371 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8372 return (ENOMEM); 8373 } 8374 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8375 /* update our MTU size */ 8376 if (mtu > (chk->send_size + omtu)) 8377 mtu -= (chk->send_size + omtu); 8378 else 8379 mtu = 0; 8380 to_out += (chk->send_size + omtu); 8381 /* Do clear IP_DF ? */ 8382 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8383 no_fragmentflg = 0; 8384 } 8385 if (chk->rec.chunk_id.can_take_data) 8386 chk->data = NULL; 8387 /* Mark things to be removed, if needed */ 8388 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8389 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK) || /* EY */ 8390 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) || 8391 (chk->rec.chunk_id.id == SCTP_HEARTBEAT_ACK) || 8392 (chk->rec.chunk_id.id == SCTP_SHUTDOWN) || 8393 (chk->rec.chunk_id.id == SCTP_SHUTDOWN_ACK) || 8394 (chk->rec.chunk_id.id == SCTP_OPERATION_ERROR) || 8395 (chk->rec.chunk_id.id == SCTP_COOKIE_ACK) || 8396 (chk->rec.chunk_id.id == SCTP_ECN_CWR) || 8397 (chk->rec.chunk_id.id == SCTP_PACKET_DROPPED) || 8398 (chk->rec.chunk_id.id == SCTP_ASCONF_ACK)) { 8399 if (chk->rec.chunk_id.id == SCTP_HEARTBEAT_REQUEST) { 8400 hbflag = 1; 8401 } 8402 /* remove these chunks at the end */ 8403 if ((chk->rec.chunk_id.id == SCTP_SELECTIVE_ACK) || 8404 (chk->rec.chunk_id.id == SCTP_NR_SELECTIVE_ACK)) { 8405 /* turn off the timer */ 8406 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 8407 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 8408 inp, stcb, net, 8409 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_1); 8410 } 8411 } 8412 ctl_cnt++; 8413 } else { 8414 /* 8415 * Other chunks, since they have 8416 * timers running (i.e. COOKIE) we 8417 * just "trust" that it gets sent or 8418 * retransmitted. 8419 */ 8420 ctl_cnt++; 8421 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 8422 cookie = 1; 8423 no_out_cnt = 1; 8424 } else if (chk->rec.chunk_id.id == SCTP_ECN_ECHO) { 8425 /* 8426 * Increment ecne send count 8427 * here this means we may be 8428 * over-zealous in our 8429 * counting if the send 8430 * fails, but its the best 8431 * place to do it (we used 8432 * to do it in the queue of 8433 * the chunk, but that did 8434 * not tell how many times 8435 * it was sent. 8436 */ 8437 SCTP_STAT_INCR(sctps_sendecne); 8438 } 8439 chk->sent = SCTP_DATAGRAM_SENT; 8440 if (chk->whoTo == NULL) { 8441 chk->whoTo = net; 8442 atomic_add_int(&net->ref_count, 1); 8443 } 8444 chk->snd_count++; 8445 } 8446 if (mtu == 0) { 8447 /* 8448 * Ok we are out of room but we can 8449 * output without effecting the 8450 * flight size since this little guy 8451 * is a control only packet. 8452 */ 8453 if (asconf) { 8454 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, net); 8455 /* 8456 * do NOT clear the asconf 8457 * flag as it is used to do 8458 * appropriate source 8459 * address selection. 8460 */ 8461 } 8462 if (cookie) { 8463 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8464 cookie = 0; 8465 } 8466 /* Only HB or ASCONF advances time */ 8467 if (hbflag) { 8468 if (*now_filled == 0) { 8469 (void)SCTP_GETTIME_TIMEVAL(now); 8470 *now_filled = 1; 8471 } 8472 net->last_sent_time = *now; 8473 hbflag = 0; 8474 } 8475 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 8476 (struct sockaddr *)&net->ro._l_addr, 8477 outchain, 8478 auth_offset, auth, 8479 stcb->asoc.authinfo.active_keyid, 8480 no_fragmentflg, 0, asconf, 8481 inp->sctp_lport, stcb->rport, 8482 htonl(stcb->asoc.peer_vtag), 8483 net->port, NULL, 8484 0, 0, 8485 so_locked))) { 8486 /* 8487 * error, we could not 8488 * output 8489 */ 8490 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8491 if (from_where == 0) { 8492 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8493 } 8494 if (error == ENOBUFS) { 8495 asoc->ifp_had_enobuf = 1; 8496 SCTP_STAT_INCR(sctps_lowlevelerr); 8497 } 8498 if (error == EHOSTUNREACH) { 8499 /* 8500 * Destination went 8501 * unreachable 8502 * during this send 8503 */ 8504 sctp_move_chunks_from_net(stcb, net); 8505 } 8506 *reason_code = 7; 8507 break; 8508 } else { 8509 asoc->ifp_had_enobuf = 0; 8510 } 8511 /* 8512 * increase the number we sent, if a 8513 * cookie is sent we don't tell them 8514 * any was sent out. 8515 */ 8516 outchain = endoutchain = NULL; 8517 auth = NULL; 8518 auth_offset = 0; 8519 if (!no_out_cnt) 8520 *num_out += ctl_cnt; 8521 /* recalc a clean slate and setup */ 8522 switch (net->ro._l_addr.sa.sa_family) { 8523#ifdef INET 8524 case AF_INET: 8525 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8526 break; 8527#endif 8528#ifdef INET6 8529 case AF_INET6: 8530 mtu = net->mtu - SCTP_MIN_OVERHEAD; 8531 break; 8532#endif 8533 default: 8534 /* TSNH */ 8535 mtu = net->mtu; 8536 break; 8537 } 8538 to_out = 0; 8539 no_fragmentflg = 1; 8540 } 8541 } 8542 } 8543 if (error != 0) { 8544 /* try next net */ 8545 continue; 8546 } 8547 /* JRI: if dest is in PF state, do not send data to it */ 8548 if ((asoc->sctp_cmt_on_off > 0) && 8549 (net != stcb->asoc.alternate) && 8550 (net->dest_state & SCTP_ADDR_PF)) { 8551 goto no_data_fill; 8552 } 8553 if (net->flight_size >= net->cwnd) { 8554 goto no_data_fill; 8555 } 8556 if ((asoc->sctp_cmt_on_off > 0) && 8557 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_RECV_BUFFER_SPLITTING) && 8558 (net->flight_size > max_rwnd_per_dest)) { 8559 goto no_data_fill; 8560 } 8561 /* 8562 * We need a specific accounting for the usage of the send 8563 * buffer. We also need to check the number of messages per 8564 * net. For now, this is better than nothing and it disabled 8565 * by default... 8566 */ 8567 if ((asoc->sctp_cmt_on_off > 0) && 8568 (SCTP_BASE_SYSCTL(sctp_buffer_splitting) & SCTP_SEND_BUFFER_SPLITTING) && 8569 (max_send_per_dest > 0) && 8570 (net->flight_size > max_send_per_dest)) { 8571 goto no_data_fill; 8572 } 8573 /*********************/ 8574 /* Data transmission */ 8575 /*********************/ 8576 /* 8577 * if AUTH for DATA is required and no AUTH has been added 8578 * yet, account for this in the mtu now... if no data can be 8579 * bundled, this adjustment won't matter anyways since the 8580 * packet will be going out... 8581 */ 8582 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, 8583 stcb->asoc.peer_auth_chunks); 8584 if (data_auth_reqd && (auth == NULL)) { 8585 mtu -= sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 8586 } 8587 /* now lets add any data within the MTU constraints */ 8588 switch (((struct sockaddr *)&net->ro._l_addr)->sa_family) { 8589#ifdef INET 8590 case AF_INET: 8591 if (net->mtu > SCTP_MIN_V4_OVERHEAD) 8592 omtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 8593 else 8594 omtu = 0; 8595 break; 8596#endif 8597#ifdef INET6 8598 case AF_INET6: 8599 if (net->mtu > SCTP_MIN_OVERHEAD) 8600 omtu = net->mtu - SCTP_MIN_OVERHEAD; 8601 else 8602 omtu = 0; 8603 break; 8604#endif 8605 default: 8606 /* TSNH */ 8607 omtu = 0; 8608 break; 8609 } 8610 if ((((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 8611 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) && 8612 (skip_data_for_this_net == 0)) || 8613 (cookie)) { 8614 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 8615 if (no_data_chunks) { 8616 /* let only control go out */ 8617 *reason_code = 1; 8618 break; 8619 } 8620 if (net->flight_size >= net->cwnd) { 8621 /* skip this net, no room for data */ 8622 *reason_code = 2; 8623 break; 8624 } 8625 if ((chk->whoTo != NULL) && 8626 (chk->whoTo != net)) { 8627 /* Don't send the chunk on this net */ 8628 continue; 8629 } 8630 if (asoc->sctp_cmt_on_off == 0) { 8631 if ((asoc->alternate) && 8632 (asoc->alternate != net) && 8633 (chk->whoTo == NULL)) { 8634 continue; 8635 } else if ((net != asoc->primary_destination) && 8636 (asoc->alternate == NULL) && 8637 (chk->whoTo == NULL)) { 8638 continue; 8639 } 8640 } 8641 if ((chk->send_size > omtu) && ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) == 0)) { 8642 /*- 8643 * strange, we have a chunk that is 8644 * to big for its destination and 8645 * yet no fragment ok flag. 8646 * Something went wrong when the 8647 * PMTU changed...we did not mark 8648 * this chunk for some reason?? I 8649 * will fix it here by letting IP 8650 * fragment it for now and printing 8651 * a warning. This really should not 8652 * happen ... 8653 */ 8654 SCTP_PRINTF("Warning chunk of %d bytes > mtu:%d and yet PMTU disc missed\n", 8655 chk->send_size, mtu); 8656 chk->flags |= CHUNK_FLAGS_FRAGMENT_OK; 8657 } 8658 if (SCTP_BASE_SYSCTL(sctp_enable_sack_immediately) && 8659 ((asoc->state & SCTP_STATE_SHUTDOWN_PENDING) == SCTP_STATE_SHUTDOWN_PENDING)) { 8660 struct sctp_data_chunk *dchkh; 8661 8662 dchkh = mtod(chk->data, struct sctp_data_chunk *); 8663 dchkh->ch.chunk_flags |= SCTP_DATA_SACK_IMMEDIATELY; 8664 } 8665 if (((chk->send_size <= mtu) && (chk->send_size <= r_mtu)) || 8666 ((chk->flags & CHUNK_FLAGS_FRAGMENT_OK) && (chk->send_size <= asoc->peers_rwnd))) { 8667 /* ok we will add this one */ 8668 8669 /* 8670 * Add an AUTH chunk, if chunk 8671 * requires it, save the offset into 8672 * the chain for AUTH 8673 */ 8674 if (data_auth_reqd) { 8675 if (auth == NULL) { 8676 outchain = sctp_add_auth_chunk(outchain, 8677 &endoutchain, 8678 &auth, 8679 &auth_offset, 8680 stcb, 8681 SCTP_DATA); 8682 auth_keyid = chk->auth_keyid; 8683 override_ok = 0; 8684 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 8685 } else if (override_ok) { 8686 /* 8687 * use this data's 8688 * keyid 8689 */ 8690 auth_keyid = chk->auth_keyid; 8691 override_ok = 0; 8692 } else if (auth_keyid != chk->auth_keyid) { 8693 /* 8694 * different keyid, 8695 * so done bundling 8696 */ 8697 break; 8698 } 8699 } 8700 outchain = sctp_copy_mbufchain(chk->data, outchain, &endoutchain, 0, 8701 chk->send_size, chk->copy_by_ref); 8702 if (outchain == NULL) { 8703 SCTPDBG(SCTP_DEBUG_OUTPUT3, "No memory?\n"); 8704 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 8705 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8706 } 8707 *reason_code = 3; 8708 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 8709 return (ENOMEM); 8710 } 8711 /* upate our MTU size */ 8712 /* Do clear IP_DF ? */ 8713 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 8714 no_fragmentflg = 0; 8715 } 8716 /* unsigned subtraction of mtu */ 8717 if (mtu > chk->send_size) 8718 mtu -= chk->send_size; 8719 else 8720 mtu = 0; 8721 /* unsigned subtraction of r_mtu */ 8722 if (r_mtu > chk->send_size) 8723 r_mtu -= chk->send_size; 8724 else 8725 r_mtu = 0; 8726 8727 to_out += chk->send_size; 8728 if ((to_out > mx_mtu) && no_fragmentflg) { 8729#ifdef INVARIANTS 8730 panic("Exceeding mtu of %d out size is %d", mx_mtu, to_out); 8731#else 8732 SCTP_PRINTF("Exceeding mtu of %d out size is %d\n", 8733 mx_mtu, to_out); 8734#endif 8735 } 8736 chk->window_probe = 0; 8737 data_list[bundle_at++] = chk; 8738 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 8739 break; 8740 } 8741 if (chk->sent == SCTP_DATAGRAM_UNSENT) { 8742 if ((chk->rec.data.rcv_flags & SCTP_DATA_UNORDERED) == 0) { 8743 SCTP_STAT_INCR_COUNTER64(sctps_outorderchunks); 8744 } else { 8745 SCTP_STAT_INCR_COUNTER64(sctps_outunorderchunks); 8746 } 8747 if (((chk->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) == SCTP_DATA_LAST_FRAG) && 8748 ((chk->rec.data.rcv_flags & SCTP_DATA_FIRST_FRAG) == 0)) 8749 /* 8750 * Count number of 8751 * user msg's that 8752 * were fragmented 8753 * we do this by 8754 * counting when we 8755 * see a LAST 8756 * fragment only. 8757 */ 8758 SCTP_STAT_INCR_COUNTER64(sctps_fragusrmsgs); 8759 } 8760 if ((mtu == 0) || (r_mtu == 0) || (one_chunk)) { 8761 if ((one_chunk) && (stcb->asoc.total_flight == 0)) { 8762 data_list[0]->window_probe = 1; 8763 net->window_probe = 1; 8764 } 8765 break; 8766 } 8767 } else { 8768 /* 8769 * Must be sent in order of the 8770 * TSN's (on a network) 8771 */ 8772 break; 8773 } 8774 } /* for (chunk gather loop for this net) */ 8775 } /* if asoc.state OPEN */ 8776no_data_fill: 8777 /* Is there something to send for this destination? */ 8778 if (outchain) { 8779 /* We may need to start a control timer or two */ 8780 if (asconf) { 8781 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, 8782 stcb, net); 8783 /* 8784 * do NOT clear the asconf flag as it is 8785 * used to do appropriate source address 8786 * selection. 8787 */ 8788 } 8789 if (cookie) { 8790 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, net); 8791 cookie = 0; 8792 } 8793 /* must start a send timer if data is being sent */ 8794 if (bundle_at && (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer))) { 8795 /* 8796 * no timer running on this destination 8797 * restart it. 8798 */ 8799 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 8800 } 8801 if (bundle_at || hbflag) { 8802 /* For data/asconf and hb set time */ 8803 if (*now_filled == 0) { 8804 (void)SCTP_GETTIME_TIMEVAL(now); 8805 *now_filled = 1; 8806 } 8807 net->last_sent_time = *now; 8808 } 8809 /* Now send it, if there is anything to send :> */ 8810 if ((error = sctp_lowlevel_chunk_output(inp, 8811 stcb, 8812 net, 8813 (struct sockaddr *)&net->ro._l_addr, 8814 outchain, 8815 auth_offset, 8816 auth, 8817 auth_keyid, 8818 no_fragmentflg, 8819 bundle_at, 8820 asconf, 8821 inp->sctp_lport, stcb->rport, 8822 htonl(stcb->asoc.peer_vtag), 8823 net->port, NULL, 8824 0, 0, 8825 so_locked))) { 8826 /* error, we could not output */ 8827 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Gak send error %d\n", error); 8828 if (from_where == 0) { 8829 SCTP_STAT_INCR(sctps_lowlevelerrusr); 8830 } 8831 if (error == ENOBUFS) { 8832 SCTP_STAT_INCR(sctps_lowlevelerr); 8833 asoc->ifp_had_enobuf = 1; 8834 } 8835 if (error == EHOSTUNREACH) { 8836 /* 8837 * Destination went unreachable 8838 * during this send 8839 */ 8840 sctp_move_chunks_from_net(stcb, net); 8841 } 8842 *reason_code = 6; 8843 /*- 8844 * I add this line to be paranoid. As far as 8845 * I can tell the continue, takes us back to 8846 * the top of the for, but just to make sure 8847 * I will reset these again here. 8848 */ 8849 ctl_cnt = bundle_at = 0; 8850 continue; /* This takes us back to the 8851 * for() for the nets. */ 8852 } else { 8853 asoc->ifp_had_enobuf = 0; 8854 } 8855 endoutchain = NULL; 8856 auth = NULL; 8857 auth_offset = 0; 8858 if (!no_out_cnt) { 8859 *num_out += (ctl_cnt + bundle_at); 8860 } 8861 if (bundle_at) { 8862 /* setup for a RTO measurement */ 8863 tsns_sent = data_list[0]->rec.data.TSN_seq; 8864 /* fill time if not already filled */ 8865 if (*now_filled == 0) { 8866 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 8867 *now_filled = 1; 8868 *now = asoc->time_last_sent; 8869 } else { 8870 asoc->time_last_sent = *now; 8871 } 8872 if (net->rto_needed) { 8873 data_list[0]->do_rtt = 1; 8874 net->rto_needed = 0; 8875 } 8876 SCTP_STAT_INCR_BY(sctps_senddata, bundle_at); 8877 sctp_clean_up_datalist(stcb, asoc, data_list, bundle_at, net); 8878 } 8879 if (one_chunk) { 8880 break; 8881 } 8882 } 8883 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8884 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_SEND); 8885 } 8886 } 8887 if (old_start_at == NULL) { 8888 old_start_at = start_at; 8889 start_at = TAILQ_FIRST(&asoc->nets); 8890 if (old_start_at) 8891 goto again_one_more_time; 8892 } 8893 /* 8894 * At the end there should be no NON timed chunks hanging on this 8895 * queue. 8896 */ 8897 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 8898 sctp_log_cwnd(stcb, net, *num_out, SCTP_CWND_LOG_FROM_SEND); 8899 } 8900 if ((*num_out == 0) && (*reason_code == 0)) { 8901 *reason_code = 4; 8902 } else { 8903 *reason_code = 5; 8904 } 8905 sctp_clean_up_ctl(stcb, asoc, so_locked); 8906 return (0); 8907} 8908 8909void 8910sctp_queue_op_err(struct sctp_tcb *stcb, struct mbuf *op_err) 8911{ 8912 /*- 8913 * Prepend a OPERATIONAL_ERROR chunk header and put on the end of 8914 * the control chunk queue. 8915 */ 8916 struct sctp_chunkhdr *hdr; 8917 struct sctp_tmit_chunk *chk; 8918 struct mbuf *mat, *last_mbuf; 8919 uint32_t chunk_length; 8920 uint16_t padding_length; 8921 8922 SCTP_TCB_LOCK_ASSERT(stcb); 8923 SCTP_BUF_PREPEND(op_err, sizeof(struct sctp_chunkhdr), M_NOWAIT); 8924 if (op_err == NULL) { 8925 return; 8926 } 8927 last_mbuf = NULL; 8928 chunk_length = 0; 8929 for (mat = op_err; mat != NULL; mat = SCTP_BUF_NEXT(mat)) { 8930 chunk_length += SCTP_BUF_LEN(mat); 8931 if (SCTP_BUF_NEXT(mat) == NULL) { 8932 last_mbuf = mat; 8933 } 8934 } 8935 if (chunk_length > SCTP_MAX_CHUNK_LENGTH) { 8936 sctp_m_freem(op_err); 8937 return; 8938 } 8939 padding_length = chunk_length % 4; 8940 if (padding_length != 0) { 8941 padding_length = 4 - padding_length; 8942 } 8943 if (padding_length != 0) { 8944 if (sctp_add_pad_tombuf(last_mbuf, padding_length) == NULL) { 8945 sctp_m_freem(op_err); 8946 return; 8947 } 8948 } 8949 sctp_alloc_a_chunk(stcb, chk); 8950 if (chk == NULL) { 8951 /* no memory */ 8952 sctp_m_freem(op_err); 8953 return; 8954 } 8955 chk->copy_by_ref = 0; 8956 chk->send_size = (uint16_t) chunk_length; 8957 chk->sent = SCTP_DATAGRAM_UNSENT; 8958 chk->snd_count = 0; 8959 chk->asoc = &stcb->asoc; 8960 chk->data = op_err; 8961 chk->whoTo = NULL; 8962 hdr = mtod(op_err, struct sctp_chunkhdr *); 8963 hdr->chunk_type = SCTP_OPERATION_ERROR; 8964 hdr->chunk_flags = 0; 8965 hdr->chunk_length = htons(chk->send_size); 8966 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 8967 chk->asoc->ctrl_queue_cnt++; 8968} 8969 8970int 8971sctp_send_cookie_echo(struct mbuf *m, 8972 int offset, 8973 struct sctp_tcb *stcb, 8974 struct sctp_nets *net) 8975{ 8976 /*- 8977 * pull out the cookie and put it at the front of the control chunk 8978 * queue. 8979 */ 8980 int at; 8981 struct mbuf *cookie; 8982 struct sctp_paramhdr parm, *phdr; 8983 struct sctp_chunkhdr *hdr; 8984 struct sctp_tmit_chunk *chk; 8985 uint16_t ptype, plen; 8986 8987 SCTP_TCB_LOCK_ASSERT(stcb); 8988 /* First find the cookie in the param area */ 8989 cookie = NULL; 8990 at = offset + sizeof(struct sctp_init_chunk); 8991 for (;;) { 8992 phdr = sctp_get_next_param(m, at, &parm, sizeof(parm)); 8993 if (phdr == NULL) { 8994 return (-3); 8995 } 8996 ptype = ntohs(phdr->param_type); 8997 plen = ntohs(phdr->param_length); 8998 if (ptype == SCTP_STATE_COOKIE) { 8999 int pad; 9000 9001 /* found the cookie */ 9002 if ((pad = (plen % 4))) { 9003 plen += 4 - pad; 9004 } 9005 cookie = SCTP_M_COPYM(m, at, plen, M_NOWAIT); 9006 if (cookie == NULL) { 9007 /* No memory */ 9008 return (-2); 9009 } 9010#ifdef SCTP_MBUF_LOGGING 9011 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9012 sctp_log_mbc(cookie, SCTP_MBUF_ICOPY); 9013 } 9014#endif 9015 break; 9016 } 9017 at += SCTP_SIZE32(plen); 9018 } 9019 /* ok, we got the cookie lets change it into a cookie echo chunk */ 9020 /* first the change from param to cookie */ 9021 hdr = mtod(cookie, struct sctp_chunkhdr *); 9022 hdr->chunk_type = SCTP_COOKIE_ECHO; 9023 hdr->chunk_flags = 0; 9024 /* get the chunk stuff now and place it in the FRONT of the queue */ 9025 sctp_alloc_a_chunk(stcb, chk); 9026 if (chk == NULL) { 9027 /* no memory */ 9028 sctp_m_freem(cookie); 9029 return (-5); 9030 } 9031 chk->copy_by_ref = 0; 9032 chk->rec.chunk_id.id = SCTP_COOKIE_ECHO; 9033 chk->rec.chunk_id.can_take_data = 0; 9034 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9035 chk->send_size = plen; 9036 chk->sent = SCTP_DATAGRAM_UNSENT; 9037 chk->snd_count = 0; 9038 chk->asoc = &stcb->asoc; 9039 chk->data = cookie; 9040 chk->whoTo = net; 9041 atomic_add_int(&chk->whoTo->ref_count, 1); 9042 TAILQ_INSERT_HEAD(&chk->asoc->control_send_queue, chk, sctp_next); 9043 chk->asoc->ctrl_queue_cnt++; 9044 return (0); 9045} 9046 9047void 9048sctp_send_heartbeat_ack(struct sctp_tcb *stcb, 9049 struct mbuf *m, 9050 int offset, 9051 int chk_length, 9052 struct sctp_nets *net) 9053{ 9054 /* 9055 * take a HB request and make it into a HB ack and send it. 9056 */ 9057 struct mbuf *outchain; 9058 struct sctp_chunkhdr *chdr; 9059 struct sctp_tmit_chunk *chk; 9060 9061 9062 if (net == NULL) 9063 /* must have a net pointer */ 9064 return; 9065 9066 outchain = SCTP_M_COPYM(m, offset, chk_length, M_NOWAIT); 9067 if (outchain == NULL) { 9068 /* gak out of memory */ 9069 return; 9070 } 9071#ifdef SCTP_MBUF_LOGGING 9072 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9073 sctp_log_mbc(outchain, SCTP_MBUF_ICOPY); 9074 } 9075#endif 9076 chdr = mtod(outchain, struct sctp_chunkhdr *); 9077 chdr->chunk_type = SCTP_HEARTBEAT_ACK; 9078 chdr->chunk_flags = 0; 9079 if (chk_length % 4) { 9080 /* need pad */ 9081 uint32_t cpthis = 0; 9082 int padlen; 9083 9084 padlen = 4 - (chk_length % 4); 9085 m_copyback(outchain, chk_length, padlen, (caddr_t)&cpthis); 9086 } 9087 sctp_alloc_a_chunk(stcb, chk); 9088 if (chk == NULL) { 9089 /* no memory */ 9090 sctp_m_freem(outchain); 9091 return; 9092 } 9093 chk->copy_by_ref = 0; 9094 chk->rec.chunk_id.id = SCTP_HEARTBEAT_ACK; 9095 chk->rec.chunk_id.can_take_data = 1; 9096 chk->flags = 0; 9097 chk->send_size = chk_length; 9098 chk->sent = SCTP_DATAGRAM_UNSENT; 9099 chk->snd_count = 0; 9100 chk->asoc = &stcb->asoc; 9101 chk->data = outchain; 9102 chk->whoTo = net; 9103 atomic_add_int(&chk->whoTo->ref_count, 1); 9104 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9105 chk->asoc->ctrl_queue_cnt++; 9106} 9107 9108void 9109sctp_send_cookie_ack(struct sctp_tcb *stcb) 9110{ 9111 /* formulate and queue a cookie-ack back to sender */ 9112 struct mbuf *cookie_ack; 9113 struct sctp_chunkhdr *hdr; 9114 struct sctp_tmit_chunk *chk; 9115 9116 SCTP_TCB_LOCK_ASSERT(stcb); 9117 9118 cookie_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 9119 if (cookie_ack == NULL) { 9120 /* no mbuf's */ 9121 return; 9122 } 9123 SCTP_BUF_RESV_UF(cookie_ack, SCTP_MIN_OVERHEAD); 9124 sctp_alloc_a_chunk(stcb, chk); 9125 if (chk == NULL) { 9126 /* no memory */ 9127 sctp_m_freem(cookie_ack); 9128 return; 9129 } 9130 chk->copy_by_ref = 0; 9131 chk->rec.chunk_id.id = SCTP_COOKIE_ACK; 9132 chk->rec.chunk_id.can_take_data = 1; 9133 chk->flags = 0; 9134 chk->send_size = sizeof(struct sctp_chunkhdr); 9135 chk->sent = SCTP_DATAGRAM_UNSENT; 9136 chk->snd_count = 0; 9137 chk->asoc = &stcb->asoc; 9138 chk->data = cookie_ack; 9139 if (chk->asoc->last_control_chunk_from != NULL) { 9140 chk->whoTo = chk->asoc->last_control_chunk_from; 9141 atomic_add_int(&chk->whoTo->ref_count, 1); 9142 } else { 9143 chk->whoTo = NULL; 9144 } 9145 hdr = mtod(cookie_ack, struct sctp_chunkhdr *); 9146 hdr->chunk_type = SCTP_COOKIE_ACK; 9147 hdr->chunk_flags = 0; 9148 hdr->chunk_length = htons(chk->send_size); 9149 SCTP_BUF_LEN(cookie_ack) = chk->send_size; 9150 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9151 chk->asoc->ctrl_queue_cnt++; 9152 return; 9153} 9154 9155 9156void 9157sctp_send_shutdown_ack(struct sctp_tcb *stcb, struct sctp_nets *net) 9158{ 9159 /* formulate and queue a SHUTDOWN-ACK back to the sender */ 9160 struct mbuf *m_shutdown_ack; 9161 struct sctp_shutdown_ack_chunk *ack_cp; 9162 struct sctp_tmit_chunk *chk; 9163 9164 m_shutdown_ack = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_ack_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9165 if (m_shutdown_ack == NULL) { 9166 /* no mbuf's */ 9167 return; 9168 } 9169 SCTP_BUF_RESV_UF(m_shutdown_ack, SCTP_MIN_OVERHEAD); 9170 sctp_alloc_a_chunk(stcb, chk); 9171 if (chk == NULL) { 9172 /* no memory */ 9173 sctp_m_freem(m_shutdown_ack); 9174 return; 9175 } 9176 chk->copy_by_ref = 0; 9177 chk->rec.chunk_id.id = SCTP_SHUTDOWN_ACK; 9178 chk->rec.chunk_id.can_take_data = 1; 9179 chk->flags = 0; 9180 chk->send_size = sizeof(struct sctp_chunkhdr); 9181 chk->sent = SCTP_DATAGRAM_UNSENT; 9182 chk->snd_count = 0; 9183 chk->flags = 0; 9184 chk->asoc = &stcb->asoc; 9185 chk->data = m_shutdown_ack; 9186 chk->whoTo = net; 9187 if (chk->whoTo) { 9188 atomic_add_int(&chk->whoTo->ref_count, 1); 9189 } 9190 ack_cp = mtod(m_shutdown_ack, struct sctp_shutdown_ack_chunk *); 9191 ack_cp->ch.chunk_type = SCTP_SHUTDOWN_ACK; 9192 ack_cp->ch.chunk_flags = 0; 9193 ack_cp->ch.chunk_length = htons(chk->send_size); 9194 SCTP_BUF_LEN(m_shutdown_ack) = chk->send_size; 9195 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9196 chk->asoc->ctrl_queue_cnt++; 9197 return; 9198} 9199 9200void 9201sctp_send_shutdown(struct sctp_tcb *stcb, struct sctp_nets *net) 9202{ 9203 /* formulate and queue a SHUTDOWN to the sender */ 9204 struct mbuf *m_shutdown; 9205 struct sctp_shutdown_chunk *shutdown_cp; 9206 struct sctp_tmit_chunk *chk; 9207 9208 m_shutdown = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_chunk), 0, M_NOWAIT, 1, MT_HEADER); 9209 if (m_shutdown == NULL) { 9210 /* no mbuf's */ 9211 return; 9212 } 9213 SCTP_BUF_RESV_UF(m_shutdown, SCTP_MIN_OVERHEAD); 9214 sctp_alloc_a_chunk(stcb, chk); 9215 if (chk == NULL) { 9216 /* no memory */ 9217 sctp_m_freem(m_shutdown); 9218 return; 9219 } 9220 chk->copy_by_ref = 0; 9221 chk->rec.chunk_id.id = SCTP_SHUTDOWN; 9222 chk->rec.chunk_id.can_take_data = 1; 9223 chk->flags = 0; 9224 chk->send_size = sizeof(struct sctp_shutdown_chunk); 9225 chk->sent = SCTP_DATAGRAM_UNSENT; 9226 chk->snd_count = 0; 9227 chk->flags = 0; 9228 chk->asoc = &stcb->asoc; 9229 chk->data = m_shutdown; 9230 chk->whoTo = net; 9231 if (chk->whoTo) { 9232 atomic_add_int(&chk->whoTo->ref_count, 1); 9233 } 9234 shutdown_cp = mtod(m_shutdown, struct sctp_shutdown_chunk *); 9235 shutdown_cp->ch.chunk_type = SCTP_SHUTDOWN; 9236 shutdown_cp->ch.chunk_flags = 0; 9237 shutdown_cp->ch.chunk_length = htons(chk->send_size); 9238 shutdown_cp->cumulative_tsn_ack = htonl(stcb->asoc.cumulative_tsn); 9239 SCTP_BUF_LEN(m_shutdown) = chk->send_size; 9240 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9241 chk->asoc->ctrl_queue_cnt++; 9242 return; 9243} 9244 9245void 9246sctp_send_asconf(struct sctp_tcb *stcb, struct sctp_nets *net, int addr_locked) 9247{ 9248 /* 9249 * formulate and queue an ASCONF to the peer. ASCONF parameters 9250 * should be queued on the assoc queue. 9251 */ 9252 struct sctp_tmit_chunk *chk; 9253 struct mbuf *m_asconf; 9254 int len; 9255 9256 SCTP_TCB_LOCK_ASSERT(stcb); 9257 9258 if ((!TAILQ_EMPTY(&stcb->asoc.asconf_send_queue)) && 9259 (!sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS))) { 9260 /* can't send a new one if there is one in flight already */ 9261 return; 9262 } 9263 /* compose an ASCONF chunk, maximum length is PMTU */ 9264 m_asconf = sctp_compose_asconf(stcb, &len, addr_locked); 9265 if (m_asconf == NULL) { 9266 return; 9267 } 9268 sctp_alloc_a_chunk(stcb, chk); 9269 if (chk == NULL) { 9270 /* no memory */ 9271 sctp_m_freem(m_asconf); 9272 return; 9273 } 9274 chk->copy_by_ref = 0; 9275 chk->rec.chunk_id.id = SCTP_ASCONF; 9276 chk->rec.chunk_id.can_take_data = 0; 9277 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9278 chk->data = m_asconf; 9279 chk->send_size = len; 9280 chk->sent = SCTP_DATAGRAM_UNSENT; 9281 chk->snd_count = 0; 9282 chk->asoc = &stcb->asoc; 9283 chk->whoTo = net; 9284 if (chk->whoTo) { 9285 atomic_add_int(&chk->whoTo->ref_count, 1); 9286 } 9287 TAILQ_INSERT_TAIL(&chk->asoc->asconf_send_queue, chk, sctp_next); 9288 chk->asoc->ctrl_queue_cnt++; 9289 return; 9290} 9291 9292void 9293sctp_send_asconf_ack(struct sctp_tcb *stcb) 9294{ 9295 /* 9296 * formulate and queue a asconf-ack back to sender. the asconf-ack 9297 * must be stored in the tcb. 9298 */ 9299 struct sctp_tmit_chunk *chk; 9300 struct sctp_asconf_ack *ack, *latest_ack; 9301 struct mbuf *m_ack; 9302 struct sctp_nets *net = NULL; 9303 9304 SCTP_TCB_LOCK_ASSERT(stcb); 9305 /* Get the latest ASCONF-ACK */ 9306 latest_ack = TAILQ_LAST(&stcb->asoc.asconf_ack_sent, sctp_asconf_ackhead); 9307 if (latest_ack == NULL) { 9308 return; 9309 } 9310 if (latest_ack->last_sent_to != NULL && 9311 latest_ack->last_sent_to == stcb->asoc.last_control_chunk_from) { 9312 /* we're doing a retransmission */ 9313 net = sctp_find_alternate_net(stcb, stcb->asoc.last_control_chunk_from, 0); 9314 if (net == NULL) { 9315 /* no alternate */ 9316 if (stcb->asoc.last_control_chunk_from == NULL) { 9317 if (stcb->asoc.alternate) { 9318 net = stcb->asoc.alternate; 9319 } else { 9320 net = stcb->asoc.primary_destination; 9321 } 9322 } else { 9323 net = stcb->asoc.last_control_chunk_from; 9324 } 9325 } 9326 } else { 9327 /* normal case */ 9328 if (stcb->asoc.last_control_chunk_from == NULL) { 9329 if (stcb->asoc.alternate) { 9330 net = stcb->asoc.alternate; 9331 } else { 9332 net = stcb->asoc.primary_destination; 9333 } 9334 } else { 9335 net = stcb->asoc.last_control_chunk_from; 9336 } 9337 } 9338 latest_ack->last_sent_to = net; 9339 9340 TAILQ_FOREACH(ack, &stcb->asoc.asconf_ack_sent, next) { 9341 if (ack->data == NULL) { 9342 continue; 9343 } 9344 /* copy the asconf_ack */ 9345 m_ack = SCTP_M_COPYM(ack->data, 0, M_COPYALL, M_NOWAIT); 9346 if (m_ack == NULL) { 9347 /* couldn't copy it */ 9348 return; 9349 } 9350#ifdef SCTP_MBUF_LOGGING 9351 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) { 9352 sctp_log_mbc(m_ack, SCTP_MBUF_ICOPY); 9353 } 9354#endif 9355 9356 sctp_alloc_a_chunk(stcb, chk); 9357 if (chk == NULL) { 9358 /* no memory */ 9359 if (m_ack) 9360 sctp_m_freem(m_ack); 9361 return; 9362 } 9363 chk->copy_by_ref = 0; 9364 chk->rec.chunk_id.id = SCTP_ASCONF_ACK; 9365 chk->rec.chunk_id.can_take_data = 1; 9366 chk->flags = CHUNK_FLAGS_FRAGMENT_OK; 9367 chk->whoTo = net; 9368 if (chk->whoTo) { 9369 atomic_add_int(&chk->whoTo->ref_count, 1); 9370 } 9371 chk->data = m_ack; 9372 chk->send_size = ack->len; 9373 chk->sent = SCTP_DATAGRAM_UNSENT; 9374 chk->snd_count = 0; 9375 chk->asoc = &stcb->asoc; 9376 9377 TAILQ_INSERT_TAIL(&chk->asoc->control_send_queue, chk, sctp_next); 9378 chk->asoc->ctrl_queue_cnt++; 9379 } 9380 return; 9381} 9382 9383 9384static int 9385sctp_chunk_retransmission(struct sctp_inpcb *inp, 9386 struct sctp_tcb *stcb, 9387 struct sctp_association *asoc, 9388 int *cnt_out, struct timeval *now, int *now_filled, int *fr_done, int so_locked 9389#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9390 SCTP_UNUSED 9391#endif 9392) 9393{ 9394 /*- 9395 * send out one MTU of retransmission. If fast_retransmit is 9396 * happening we ignore the cwnd. Otherwise we obey the cwnd and 9397 * rwnd. For a Cookie or Asconf in the control chunk queue we 9398 * retransmit them by themselves. 9399 * 9400 * For data chunks we will pick out the lowest TSN's in the sent_queue 9401 * marked for resend and bundle them all together (up to a MTU of 9402 * destination). The address to send to should have been 9403 * selected/changed where the retransmission was marked (i.e. in FR 9404 * or t3-timeout routines). 9405 */ 9406 struct sctp_tmit_chunk *data_list[SCTP_MAX_DATA_BUNDLING]; 9407 struct sctp_tmit_chunk *chk, *fwd; 9408 struct mbuf *m, *endofchain; 9409 struct sctp_nets *net = NULL; 9410 uint32_t tsns_sent = 0; 9411 int no_fragmentflg, bundle_at, cnt_thru; 9412 unsigned int mtu; 9413 int error, i, one_chunk, fwd_tsn, ctl_cnt, tmr_started; 9414 struct sctp_auth_chunk *auth = NULL; 9415 uint32_t auth_offset = 0; 9416 uint16_t auth_keyid; 9417 int override_ok = 1; 9418 int data_auth_reqd = 0; 9419 uint32_t dmtu = 0; 9420 9421 SCTP_TCB_LOCK_ASSERT(stcb); 9422 tmr_started = ctl_cnt = bundle_at = error = 0; 9423 no_fragmentflg = 1; 9424 fwd_tsn = 0; 9425 *cnt_out = 0; 9426 fwd = NULL; 9427 endofchain = m = NULL; 9428 auth_keyid = stcb->asoc.authinfo.active_keyid; 9429#ifdef SCTP_AUDITING_ENABLED 9430 sctp_audit_log(0xC3, 1); 9431#endif 9432 if ((TAILQ_EMPTY(&asoc->sent_queue)) && 9433 (TAILQ_EMPTY(&asoc->control_send_queue))) { 9434 SCTPDBG(SCTP_DEBUG_OUTPUT1, "SCTP hits empty queue with cnt set to %d?\n", 9435 asoc->sent_queue_retran_cnt); 9436 asoc->sent_queue_cnt = 0; 9437 asoc->sent_queue_cnt_removeable = 0; 9438 /* send back 0/0 so we enter normal transmission */ 9439 *cnt_out = 0; 9440 return (0); 9441 } 9442 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 9443 if ((chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) || 9444 (chk->rec.chunk_id.id == SCTP_STREAM_RESET) || 9445 (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN)) { 9446 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9447 continue; 9448 } 9449 if (chk->rec.chunk_id.id == SCTP_STREAM_RESET) { 9450 if (chk != asoc->str_reset) { 9451 /* 9452 * not eligible for retran if its 9453 * not ours 9454 */ 9455 continue; 9456 } 9457 } 9458 ctl_cnt++; 9459 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 9460 fwd_tsn = 1; 9461 } 9462 /* 9463 * Add an AUTH chunk, if chunk requires it save the 9464 * offset into the chain for AUTH 9465 */ 9466 if ((auth == NULL) && 9467 (sctp_auth_is_required_chunk(chk->rec.chunk_id.id, 9468 stcb->asoc.peer_auth_chunks))) { 9469 m = sctp_add_auth_chunk(m, &endofchain, 9470 &auth, &auth_offset, 9471 stcb, 9472 chk->rec.chunk_id.id); 9473 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9474 } 9475 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9476 break; 9477 } 9478 } 9479 one_chunk = 0; 9480 cnt_thru = 0; 9481 /* do we have control chunks to retransmit? */ 9482 if (m != NULL) { 9483 /* Start a timer no matter if we suceed or fail */ 9484 if (chk->rec.chunk_id.id == SCTP_COOKIE_ECHO) { 9485 sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, inp, stcb, chk->whoTo); 9486 } else if (chk->rec.chunk_id.id == SCTP_ASCONF) 9487 sctp_timer_start(SCTP_TIMER_TYPE_ASCONF, inp, stcb, chk->whoTo); 9488 chk->snd_count++; /* update our count */ 9489 if ((error = sctp_lowlevel_chunk_output(inp, stcb, chk->whoTo, 9490 (struct sockaddr *)&chk->whoTo->ro._l_addr, m, 9491 auth_offset, auth, stcb->asoc.authinfo.active_keyid, 9492 no_fragmentflg, 0, 0, 9493 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9494 chk->whoTo->port, NULL, 9495 0, 0, 9496 so_locked))) { 9497 SCTP_STAT_INCR(sctps_lowlevelerr); 9498 return (error); 9499 } 9500 endofchain = NULL; 9501 auth = NULL; 9502 auth_offset = 0; 9503 /* 9504 * We don't want to mark the net->sent time here since this 9505 * we use this for HB and retrans cannot measure RTT 9506 */ 9507 /* (void)SCTP_GETTIME_TIMEVAL(&chk->whoTo->last_sent_time); */ 9508 *cnt_out += 1; 9509 chk->sent = SCTP_DATAGRAM_SENT; 9510 sctp_ucount_decr(stcb->asoc.sent_queue_retran_cnt); 9511 if (fwd_tsn == 0) { 9512 return (0); 9513 } else { 9514 /* Clean up the fwd-tsn list */ 9515 sctp_clean_up_ctl(stcb, asoc, so_locked); 9516 return (0); 9517 } 9518 } 9519 /* 9520 * Ok, it is just data retransmission we need to do or that and a 9521 * fwd-tsn with it all. 9522 */ 9523 if (TAILQ_EMPTY(&asoc->sent_queue)) { 9524 return (SCTP_RETRAN_DONE); 9525 } 9526 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) || 9527 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT)) { 9528 /* not yet open, resend the cookie and that is it */ 9529 return (1); 9530 } 9531#ifdef SCTP_AUDITING_ENABLED 9532 sctp_auditing(20, inp, stcb, NULL); 9533#endif 9534 data_auth_reqd = sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks); 9535 TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { 9536 if (chk->sent != SCTP_DATAGRAM_RESEND) { 9537 /* No, not sent to this net or not ready for rtx */ 9538 continue; 9539 } 9540 if (chk->data == NULL) { 9541 SCTP_PRINTF("TSN:%x chk->snd_count:%d chk->sent:%d can't retran - no data\n", 9542 chk->rec.data.TSN_seq, chk->snd_count, chk->sent); 9543 continue; 9544 } 9545 if ((SCTP_BASE_SYSCTL(sctp_max_retran_chunk)) && 9546 (chk->snd_count >= SCTP_BASE_SYSCTL(sctp_max_retran_chunk))) { 9547 struct mbuf *op_err; 9548 char msg[SCTP_DIAG_INFO_LEN]; 9549 9550 snprintf(msg, sizeof(msg), "TSN %8.8x retransmitted %d times, giving up", 9551 chk->rec.data.TSN_seq, chk->snd_count); 9552 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 9553 msg); 9554 atomic_add_int(&stcb->asoc.refcnt, 1); 9555 sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, 9556 so_locked); 9557 SCTP_TCB_LOCK(stcb); 9558 atomic_subtract_int(&stcb->asoc.refcnt, 1); 9559 return (SCTP_RETRAN_EXIT); 9560 } 9561 /* pick up the net */ 9562 net = chk->whoTo; 9563 switch (net->ro._l_addr.sa.sa_family) { 9564#ifdef INET 9565 case AF_INET: 9566 mtu = net->mtu - SCTP_MIN_V4_OVERHEAD; 9567 break; 9568#endif 9569#ifdef INET6 9570 case AF_INET6: 9571 mtu = net->mtu - SCTP_MIN_OVERHEAD; 9572 break; 9573#endif 9574 default: 9575 /* TSNH */ 9576 mtu = net->mtu; 9577 break; 9578 } 9579 9580 if ((asoc->peers_rwnd < mtu) && (asoc->total_flight > 0)) { 9581 /* No room in peers rwnd */ 9582 uint32_t tsn; 9583 9584 tsn = asoc->last_acked_seq + 1; 9585 if (tsn == chk->rec.data.TSN_seq) { 9586 /* 9587 * we make a special exception for this 9588 * case. The peer has no rwnd but is missing 9589 * the lowest chunk.. which is probably what 9590 * is holding up the rwnd. 9591 */ 9592 goto one_chunk_around; 9593 } 9594 return (1); 9595 } 9596one_chunk_around: 9597 if (asoc->peers_rwnd < mtu) { 9598 one_chunk = 1; 9599 if ((asoc->peers_rwnd == 0) && 9600 (asoc->total_flight == 0)) { 9601 chk->window_probe = 1; 9602 chk->whoTo->window_probe = 1; 9603 } 9604 } 9605#ifdef SCTP_AUDITING_ENABLED 9606 sctp_audit_log(0xC3, 2); 9607#endif 9608 bundle_at = 0; 9609 m = NULL; 9610 net->fast_retran_ip = 0; 9611 if (chk->rec.data.doing_fast_retransmit == 0) { 9612 /* 9613 * if no FR in progress skip destination that have 9614 * flight_size > cwnd. 9615 */ 9616 if (net->flight_size >= net->cwnd) { 9617 continue; 9618 } 9619 } else { 9620 /* 9621 * Mark the destination net to have FR recovery 9622 * limits put on it. 9623 */ 9624 *fr_done = 1; 9625 net->fast_retran_ip = 1; 9626 } 9627 9628 /* 9629 * if no AUTH is yet included and this chunk requires it, 9630 * make sure to account for it. We don't apply the size 9631 * until the AUTH chunk is actually added below in case 9632 * there is no room for this chunk. 9633 */ 9634 if (data_auth_reqd && (auth == NULL)) { 9635 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9636 } else 9637 dmtu = 0; 9638 9639 if ((chk->send_size <= (mtu - dmtu)) || 9640 (chk->flags & CHUNK_FLAGS_FRAGMENT_OK)) { 9641 /* ok we will add this one */ 9642 if (data_auth_reqd) { 9643 if (auth == NULL) { 9644 m = sctp_add_auth_chunk(m, 9645 &endofchain, 9646 &auth, 9647 &auth_offset, 9648 stcb, 9649 SCTP_DATA); 9650 auth_keyid = chk->auth_keyid; 9651 override_ok = 0; 9652 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9653 } else if (override_ok) { 9654 auth_keyid = chk->auth_keyid; 9655 override_ok = 0; 9656 } else if (chk->auth_keyid != auth_keyid) { 9657 /* different keyid, so done bundling */ 9658 break; 9659 } 9660 } 9661 m = sctp_copy_mbufchain(chk->data, m, &endofchain, 0, chk->send_size, chk->copy_by_ref); 9662 if (m == NULL) { 9663 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9664 return (ENOMEM); 9665 } 9666 /* Do clear IP_DF ? */ 9667 if (chk->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9668 no_fragmentflg = 0; 9669 } 9670 /* upate our MTU size */ 9671 if (mtu > (chk->send_size + dmtu)) 9672 mtu -= (chk->send_size + dmtu); 9673 else 9674 mtu = 0; 9675 data_list[bundle_at++] = chk; 9676 if (one_chunk && (asoc->total_flight <= 0)) { 9677 SCTP_STAT_INCR(sctps_windowprobed); 9678 } 9679 } 9680 if (one_chunk == 0) { 9681 /* 9682 * now are there anymore forward from chk to pick 9683 * up? 9684 */ 9685 for (fwd = TAILQ_NEXT(chk, sctp_next); fwd != NULL; fwd = TAILQ_NEXT(fwd, sctp_next)) { 9686 if (fwd->sent != SCTP_DATAGRAM_RESEND) { 9687 /* Nope, not for retran */ 9688 continue; 9689 } 9690 if (fwd->whoTo != net) { 9691 /* Nope, not the net in question */ 9692 continue; 9693 } 9694 if (data_auth_reqd && (auth == NULL)) { 9695 dmtu = sctp_get_auth_chunk_len(stcb->asoc.peer_hmac_id); 9696 } else 9697 dmtu = 0; 9698 if (fwd->send_size <= (mtu - dmtu)) { 9699 if (data_auth_reqd) { 9700 if (auth == NULL) { 9701 m = sctp_add_auth_chunk(m, 9702 &endofchain, 9703 &auth, 9704 &auth_offset, 9705 stcb, 9706 SCTP_DATA); 9707 auth_keyid = fwd->auth_keyid; 9708 override_ok = 0; 9709 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 9710 } else if (override_ok) { 9711 auth_keyid = fwd->auth_keyid; 9712 override_ok = 0; 9713 } else if (fwd->auth_keyid != auth_keyid) { 9714 /* 9715 * different keyid, 9716 * so done bundling 9717 */ 9718 break; 9719 } 9720 } 9721 m = sctp_copy_mbufchain(fwd->data, m, &endofchain, 0, fwd->send_size, fwd->copy_by_ref); 9722 if (m == NULL) { 9723 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 9724 return (ENOMEM); 9725 } 9726 /* Do clear IP_DF ? */ 9727 if (fwd->flags & CHUNK_FLAGS_FRAGMENT_OK) { 9728 no_fragmentflg = 0; 9729 } 9730 /* upate our MTU size */ 9731 if (mtu > (fwd->send_size + dmtu)) 9732 mtu -= (fwd->send_size + dmtu); 9733 else 9734 mtu = 0; 9735 data_list[bundle_at++] = fwd; 9736 if (bundle_at >= SCTP_MAX_DATA_BUNDLING) { 9737 break; 9738 } 9739 } else { 9740 /* can't fit so we are done */ 9741 break; 9742 } 9743 } 9744 } 9745 /* Is there something to send for this destination? */ 9746 if (m) { 9747 /* 9748 * No matter if we fail/or suceed we should start a 9749 * timer. A failure is like a lost IP packet :-) 9750 */ 9751 if (!SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9752 /* 9753 * no timer running on this destination 9754 * restart it. 9755 */ 9756 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9757 tmr_started = 1; 9758 } 9759 /* Now lets send it, if there is anything to send :> */ 9760 if ((error = sctp_lowlevel_chunk_output(inp, stcb, net, 9761 (struct sockaddr *)&net->ro._l_addr, m, 9762 auth_offset, auth, auth_keyid, 9763 no_fragmentflg, 0, 0, 9764 inp->sctp_lport, stcb->rport, htonl(stcb->asoc.peer_vtag), 9765 net->port, NULL, 9766 0, 0, 9767 so_locked))) { 9768 /* error, we could not output */ 9769 SCTP_STAT_INCR(sctps_lowlevelerr); 9770 return (error); 9771 } 9772 endofchain = NULL; 9773 auth = NULL; 9774 auth_offset = 0; 9775 /* For HB's */ 9776 /* 9777 * We don't want to mark the net->sent time here 9778 * since this we use this for HB and retrans cannot 9779 * measure RTT 9780 */ 9781 /* (void)SCTP_GETTIME_TIMEVAL(&net->last_sent_time); */ 9782 9783 /* For auto-close */ 9784 cnt_thru++; 9785 if (*now_filled == 0) { 9786 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_last_sent); 9787 *now = asoc->time_last_sent; 9788 *now_filled = 1; 9789 } else { 9790 asoc->time_last_sent = *now; 9791 } 9792 *cnt_out += bundle_at; 9793#ifdef SCTP_AUDITING_ENABLED 9794 sctp_audit_log(0xC4, bundle_at); 9795#endif 9796 if (bundle_at) { 9797 tsns_sent = data_list[0]->rec.data.TSN_seq; 9798 } 9799 for (i = 0; i < bundle_at; i++) { 9800 SCTP_STAT_INCR(sctps_sendretransdata); 9801 data_list[i]->sent = SCTP_DATAGRAM_SENT; 9802 /* 9803 * When we have a revoked data, and we 9804 * retransmit it, then we clear the revoked 9805 * flag since this flag dictates if we 9806 * subtracted from the fs 9807 */ 9808 if (data_list[i]->rec.data.chunk_was_revoked) { 9809 /* Deflate the cwnd */ 9810 data_list[i]->whoTo->cwnd -= data_list[i]->book_size; 9811 data_list[i]->rec.data.chunk_was_revoked = 0; 9812 } 9813 data_list[i]->snd_count++; 9814 sctp_ucount_decr(asoc->sent_queue_retran_cnt); 9815 /* record the time */ 9816 data_list[i]->sent_rcv_time = asoc->time_last_sent; 9817 if (data_list[i]->book_size_scale) { 9818 /* 9819 * need to double the book size on 9820 * this one 9821 */ 9822 data_list[i]->book_size_scale = 0; 9823 /* 9824 * Since we double the booksize, we 9825 * must also double the output queue 9826 * size, since this get shrunk when 9827 * we free by this amount. 9828 */ 9829 atomic_add_int(&((asoc)->total_output_queue_size), data_list[i]->book_size); 9830 data_list[i]->book_size *= 2; 9831 9832 9833 } else { 9834 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_RWND_ENABLE) { 9835 sctp_log_rwnd(SCTP_DECREASE_PEER_RWND, 9836 asoc->peers_rwnd, data_list[i]->send_size, SCTP_BASE_SYSCTL(sctp_peer_chunk_oh)); 9837 } 9838 asoc->peers_rwnd = sctp_sbspace_sub(asoc->peers_rwnd, 9839 (uint32_t) (data_list[i]->send_size + 9840 SCTP_BASE_SYSCTL(sctp_peer_chunk_oh))); 9841 } 9842 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) { 9843 sctp_misc_ints(SCTP_FLIGHT_LOG_UP_RSND, 9844 data_list[i]->whoTo->flight_size, 9845 data_list[i]->book_size, 9846 (uintptr_t) data_list[i]->whoTo, 9847 data_list[i]->rec.data.TSN_seq); 9848 } 9849 sctp_flight_size_increase(data_list[i]); 9850 sctp_total_flight_increase(stcb, data_list[i]); 9851 if (asoc->peers_rwnd < stcb->sctp_ep->sctp_ep.sctp_sws_sender) { 9852 /* SWS sender side engages */ 9853 asoc->peers_rwnd = 0; 9854 } 9855 if ((i == 0) && 9856 (data_list[i]->rec.data.doing_fast_retransmit)) { 9857 SCTP_STAT_INCR(sctps_sendfastretrans); 9858 if ((data_list[i] == TAILQ_FIRST(&asoc->sent_queue)) && 9859 (tmr_started == 0)) { 9860 /*- 9861 * ok we just fast-retrans'd 9862 * the lowest TSN, i.e the 9863 * first on the list. In 9864 * this case we want to give 9865 * some more time to get a 9866 * SACK back without a 9867 * t3-expiring. 9868 */ 9869 sctp_timer_stop(SCTP_TIMER_TYPE_SEND, inp, stcb, net, 9870 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_2); 9871 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, net); 9872 } 9873 } 9874 } 9875 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 9876 sctp_log_cwnd(stcb, net, tsns_sent, SCTP_CWND_LOG_FROM_RESEND); 9877 } 9878#ifdef SCTP_AUDITING_ENABLED 9879 sctp_auditing(21, inp, stcb, NULL); 9880#endif 9881 } else { 9882 /* None will fit */ 9883 return (1); 9884 } 9885 if (asoc->sent_queue_retran_cnt <= 0) { 9886 /* all done we have no more to retran */ 9887 asoc->sent_queue_retran_cnt = 0; 9888 break; 9889 } 9890 if (one_chunk) { 9891 /* No more room in rwnd */ 9892 return (1); 9893 } 9894 /* stop the for loop here. we sent out a packet */ 9895 break; 9896 } 9897 return (0); 9898} 9899 9900static void 9901sctp_timer_validation(struct sctp_inpcb *inp, 9902 struct sctp_tcb *stcb, 9903 struct sctp_association *asoc) 9904{ 9905 struct sctp_nets *net; 9906 9907 /* Validate that a timer is running somewhere */ 9908 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 9909 if (SCTP_OS_TIMER_PENDING(&net->rxt_timer.timer)) { 9910 /* Here is a timer */ 9911 return; 9912 } 9913 } 9914 SCTP_TCB_LOCK_ASSERT(stcb); 9915 /* Gak, we did not have a timer somewhere */ 9916 SCTPDBG(SCTP_DEBUG_OUTPUT3, "Deadlock avoided starting timer on a dest at retran\n"); 9917 if (asoc->alternate) { 9918 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->alternate); 9919 } else { 9920 sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, asoc->primary_destination); 9921 } 9922 return; 9923} 9924 9925void 9926sctp_chunk_output(struct sctp_inpcb *inp, 9927 struct sctp_tcb *stcb, 9928 int from_where, 9929 int so_locked 9930#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 9931 SCTP_UNUSED 9932#endif 9933) 9934{ 9935 /*- 9936 * Ok this is the generic chunk service queue. we must do the 9937 * following: 9938 * - See if there are retransmits pending, if so we must 9939 * do these first. 9940 * - Service the stream queue that is next, moving any 9941 * message (note I must get a complete message i.e. 9942 * FIRST/MIDDLE and LAST to the out queue in one pass) and assigning 9943 * TSN's 9944 * - Check to see if the cwnd/rwnd allows any output, if so we 9945 * go ahead and fomulate and send the low level chunks. Making sure 9946 * to combine any control in the control chunk queue also. 9947 */ 9948 struct sctp_association *asoc; 9949 struct sctp_nets *net; 9950 int error = 0, num_out, tot_out = 0, ret = 0, reason_code; 9951 unsigned int burst_cnt = 0; 9952 struct timeval now; 9953 int now_filled = 0; 9954 int nagle_on; 9955 int frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 9956 int un_sent = 0; 9957 int fr_done; 9958 unsigned int tot_frs = 0; 9959 9960 asoc = &stcb->asoc; 9961do_it_again: 9962 /* The Nagle algorithm is only applied when handling a send call. */ 9963 if (from_where == SCTP_OUTPUT_FROM_USR_SEND) { 9964 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NODELAY)) { 9965 nagle_on = 0; 9966 } else { 9967 nagle_on = 1; 9968 } 9969 } else { 9970 nagle_on = 0; 9971 } 9972 SCTP_TCB_LOCK_ASSERT(stcb); 9973 9974 un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight); 9975 9976 if ((un_sent <= 0) && 9977 (TAILQ_EMPTY(&asoc->control_send_queue)) && 9978 (TAILQ_EMPTY(&asoc->asconf_send_queue)) && 9979 (asoc->sent_queue_retran_cnt == 0) && 9980 (asoc->trigger_reset == 0)) { 9981 /* Nothing to do unless there is something to be sent left */ 9982 return; 9983 } 9984 /* 9985 * Do we have something to send, data or control AND a sack timer 9986 * running, if so piggy-back the sack. 9987 */ 9988 if (SCTP_OS_TIMER_PENDING(&stcb->asoc.dack_timer.timer)) { 9989 sctp_send_sack(stcb, so_locked); 9990 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 9991 } 9992 while (asoc->sent_queue_retran_cnt) { 9993 /*- 9994 * Ok, it is retransmission time only, we send out only ONE 9995 * packet with a single call off to the retran code. 9996 */ 9997 if (from_where == SCTP_OUTPUT_FROM_COOKIE_ACK) { 9998 /*- 9999 * Special hook for handling cookiess discarded 10000 * by peer that carried data. Send cookie-ack only 10001 * and then the next call with get the retran's. 10002 */ 10003 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 10004 from_where, 10005 &now, &now_filled, frag_point, so_locked); 10006 return; 10007 } else if (from_where != SCTP_OUTPUT_FROM_HB_TMR) { 10008 /* if its not from a HB then do it */ 10009 fr_done = 0; 10010 ret = sctp_chunk_retransmission(inp, stcb, asoc, &num_out, &now, &now_filled, &fr_done, so_locked); 10011 if (fr_done) { 10012 tot_frs++; 10013 } 10014 } else { 10015 /* 10016 * its from any other place, we don't allow retran 10017 * output (only control) 10018 */ 10019 ret = 1; 10020 } 10021 if (ret > 0) { 10022 /* Can't send anymore */ 10023 /*- 10024 * now lets push out control by calling med-level 10025 * output once. this assures that we WILL send HB's 10026 * if queued too. 10027 */ 10028 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, 10029 from_where, 10030 &now, &now_filled, frag_point, so_locked); 10031#ifdef SCTP_AUDITING_ENABLED 10032 sctp_auditing(8, inp, stcb, NULL); 10033#endif 10034 sctp_timer_validation(inp, stcb, asoc); 10035 return; 10036 } 10037 if (ret < 0) { 10038 /*- 10039 * The count was off.. retran is not happening so do 10040 * the normal retransmission. 10041 */ 10042#ifdef SCTP_AUDITING_ENABLED 10043 sctp_auditing(9, inp, stcb, NULL); 10044#endif 10045 if (ret == SCTP_RETRAN_EXIT) { 10046 return; 10047 } 10048 break; 10049 } 10050 if (from_where == SCTP_OUTPUT_FROM_T3) { 10051 /* Only one transmission allowed out of a timeout */ 10052#ifdef SCTP_AUDITING_ENABLED 10053 sctp_auditing(10, inp, stcb, NULL); 10054#endif 10055 /* Push out any control */ 10056 (void)sctp_med_chunk_output(inp, stcb, asoc, &num_out, &reason_code, 1, from_where, 10057 &now, &now_filled, frag_point, so_locked); 10058 return; 10059 } 10060 if ((asoc->fr_max_burst > 0) && (tot_frs >= asoc->fr_max_burst)) { 10061 /* Hit FR burst limit */ 10062 return; 10063 } 10064 if ((num_out == 0) && (ret == 0)) { 10065 /* No more retrans to send */ 10066 break; 10067 } 10068 } 10069#ifdef SCTP_AUDITING_ENABLED 10070 sctp_auditing(12, inp, stcb, NULL); 10071#endif 10072 /* Check for bad destinations, if they exist move chunks around. */ 10073 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 10074 if (!(net->dest_state & SCTP_ADDR_REACHABLE)) { 10075 /*- 10076 * if possible move things off of this address we 10077 * still may send below due to the dormant state but 10078 * we try to find an alternate address to send to 10079 * and if we have one we move all queued data on the 10080 * out wheel to this alternate address. 10081 */ 10082 if (net->ref_count > 1) 10083 sctp_move_chunks_from_net(stcb, net); 10084 } else { 10085 /*- 10086 * if ((asoc->sat_network) || (net->addr_is_local)) 10087 * { burst_limit = asoc->max_burst * 10088 * SCTP_SAT_NETWORK_BURST_INCR; } 10089 */ 10090 if (asoc->max_burst > 0) { 10091 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst)) { 10092 if ((net->flight_size + (asoc->max_burst * net->mtu)) < net->cwnd) { 10093 /* 10094 * JRS - Use the congestion 10095 * control given in the 10096 * congestion control module 10097 */ 10098 asoc->cc_functions.sctp_cwnd_update_after_output(stcb, net, asoc->max_burst); 10099 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10100 sctp_log_maxburst(stcb, net, 0, asoc->max_burst, SCTP_MAX_BURST_APPLIED); 10101 } 10102 SCTP_STAT_INCR(sctps_maxburstqueued); 10103 } 10104 net->fast_retran_ip = 0; 10105 } else { 10106 if (net->flight_size == 0) { 10107 /* 10108 * Should be decaying the 10109 * cwnd here 10110 */ 10111 ; 10112 } 10113 } 10114 } 10115 } 10116 10117 } 10118 burst_cnt = 0; 10119 do { 10120 error = sctp_med_chunk_output(inp, stcb, asoc, &num_out, 10121 &reason_code, 0, from_where, 10122 &now, &now_filled, frag_point, so_locked); 10123 if (error) { 10124 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Error %d was returned from med-c-op\n", error); 10125 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10126 sctp_log_maxburst(stcb, asoc->primary_destination, error, burst_cnt, SCTP_MAX_BURST_ERROR_STOP); 10127 } 10128 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10129 sctp_log_cwnd(stcb, NULL, error, SCTP_SEND_NOW_COMPLETES); 10130 sctp_log_cwnd(stcb, NULL, 0xdeadbeef, SCTP_SEND_NOW_COMPLETES); 10131 } 10132 break; 10133 } 10134 SCTPDBG(SCTP_DEBUG_OUTPUT3, "m-c-o put out %d\n", num_out); 10135 10136 tot_out += num_out; 10137 burst_cnt++; 10138 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10139 sctp_log_cwnd(stcb, NULL, num_out, SCTP_SEND_NOW_COMPLETES); 10140 if (num_out == 0) { 10141 sctp_log_cwnd(stcb, NULL, reason_code, SCTP_SEND_NOW_COMPLETES); 10142 } 10143 } 10144 if (nagle_on) { 10145 /* 10146 * When the Nagle algorithm is used, look at how 10147 * much is unsent, then if its smaller than an MTU 10148 * and we have data in flight we stop, except if we 10149 * are handling a fragmented user message. 10150 */ 10151 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 10152 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 10153 if ((un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD)) && 10154 (stcb->asoc.total_flight > 0) && 10155 ((stcb->asoc.locked_on_sending == NULL) || 10156 sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR))) { 10157 break; 10158 } 10159 } 10160 if (TAILQ_EMPTY(&asoc->control_send_queue) && 10161 TAILQ_EMPTY(&asoc->send_queue) && 10162 stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) { 10163 /* Nothing left to send */ 10164 break; 10165 } 10166 if ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) <= 0) { 10167 /* Nothing left to send */ 10168 break; 10169 } 10170 } while (num_out && 10171 ((asoc->max_burst == 0) || 10172 SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) || 10173 (burst_cnt < asoc->max_burst))); 10174 10175 if (SCTP_BASE_SYSCTL(sctp_use_cwnd_based_maxburst) == 0) { 10176 if ((asoc->max_burst > 0) && (burst_cnt >= asoc->max_burst)) { 10177 SCTP_STAT_INCR(sctps_maxburstqueued); 10178 asoc->burst_limit_applied = 1; 10179 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_MAXBURST_ENABLE) { 10180 sctp_log_maxburst(stcb, asoc->primary_destination, 0, burst_cnt, SCTP_MAX_BURST_APPLIED); 10181 } 10182 } else { 10183 asoc->burst_limit_applied = 0; 10184 } 10185 } 10186 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_CWND_LOGGING_ENABLE) { 10187 sctp_log_cwnd(stcb, NULL, tot_out, SCTP_SEND_NOW_COMPLETES); 10188 } 10189 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Ok, we have put out %d chunks\n", 10190 tot_out); 10191 10192 /*- 10193 * Now we need to clean up the control chunk chain if a ECNE is on 10194 * it. It must be marked as UNSENT again so next call will continue 10195 * to send it until such time that we get a CWR, to remove it. 10196 */ 10197 if (stcb->asoc.ecn_echo_cnt_onq) 10198 sctp_fix_ecn_echo(asoc); 10199 10200 if (stcb->asoc.trigger_reset) { 10201 if (sctp_send_stream_reset_out_if_possible(stcb, so_locked) == 0) { 10202 goto do_it_again; 10203 } 10204 } 10205 return; 10206} 10207 10208 10209int 10210sctp_output( 10211 struct sctp_inpcb *inp, 10212 struct mbuf *m, 10213 struct sockaddr *addr, 10214 struct mbuf *control, 10215 struct thread *p, 10216 int flags) 10217{ 10218 if (inp == NULL) { 10219 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10220 return (EINVAL); 10221 } 10222 if (inp->sctp_socket == NULL) { 10223 SCTP_LTRACE_ERR_RET_PKT(m, inp, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 10224 return (EINVAL); 10225 } 10226 return (sctp_sosend(inp->sctp_socket, 10227 addr, 10228 (struct uio *)NULL, 10229 m, 10230 control, 10231 flags, p 10232 )); 10233} 10234 10235void 10236send_forward_tsn(struct sctp_tcb *stcb, 10237 struct sctp_association *asoc) 10238{ 10239 struct sctp_tmit_chunk *chk; 10240 struct sctp_forward_tsn_chunk *fwdtsn; 10241 uint32_t advance_peer_ack_point; 10242 10243 SCTP_TCB_LOCK_ASSERT(stcb); 10244 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10245 if (chk->rec.chunk_id.id == SCTP_FORWARD_CUM_TSN) { 10246 /* mark it to unsent */ 10247 chk->sent = SCTP_DATAGRAM_UNSENT; 10248 chk->snd_count = 0; 10249 /* Do we correct its output location? */ 10250 if (chk->whoTo) { 10251 sctp_free_remote_addr(chk->whoTo); 10252 chk->whoTo = NULL; 10253 } 10254 goto sctp_fill_in_rest; 10255 } 10256 } 10257 /* Ok if we reach here we must build one */ 10258 sctp_alloc_a_chunk(stcb, chk); 10259 if (chk == NULL) { 10260 return; 10261 } 10262 asoc->fwd_tsn_cnt++; 10263 chk->copy_by_ref = 0; 10264 chk->rec.chunk_id.id = SCTP_FORWARD_CUM_TSN; 10265 chk->rec.chunk_id.can_take_data = 0; 10266 chk->flags = 0; 10267 chk->asoc = asoc; 10268 chk->whoTo = NULL; 10269 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 10270 if (chk->data == NULL) { 10271 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 10272 return; 10273 } 10274 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 10275 chk->sent = SCTP_DATAGRAM_UNSENT; 10276 chk->snd_count = 0; 10277 TAILQ_INSERT_TAIL(&asoc->control_send_queue, chk, sctp_next); 10278 asoc->ctrl_queue_cnt++; 10279sctp_fill_in_rest: 10280 /*- 10281 * Here we go through and fill out the part that deals with 10282 * stream/seq of the ones we skip. 10283 */ 10284 SCTP_BUF_LEN(chk->data) = 0; 10285 { 10286 struct sctp_tmit_chunk *at, *tp1, *last; 10287 struct sctp_strseq *strseq; 10288 unsigned int cnt_of_space, i, ovh; 10289 unsigned int space_needed; 10290 unsigned int cnt_of_skipped = 0; 10291 10292 TAILQ_FOREACH(at, &asoc->sent_queue, sctp_next) { 10293 if ((at->sent != SCTP_FORWARD_TSN_SKIP) && 10294 (at->sent != SCTP_DATAGRAM_NR_ACKED)) { 10295 /* no more to look at */ 10296 break; 10297 } 10298 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10299 /* We don't report these */ 10300 continue; 10301 } 10302 cnt_of_skipped++; 10303 } 10304 space_needed = (sizeof(struct sctp_forward_tsn_chunk) + 10305 (cnt_of_skipped * sizeof(struct sctp_strseq))); 10306 10307 cnt_of_space = M_TRAILINGSPACE(chk->data); 10308 10309 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 10310 ovh = SCTP_MIN_OVERHEAD; 10311 } else { 10312 ovh = SCTP_MIN_V4_OVERHEAD; 10313 } 10314 if (cnt_of_space > (asoc->smallest_mtu - ovh)) { 10315 /* trim to a mtu size */ 10316 cnt_of_space = asoc->smallest_mtu - ovh; 10317 } 10318 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10319 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10320 0xff, 0, cnt_of_skipped, 10321 asoc->advanced_peer_ack_point); 10322 10323 } 10324 advance_peer_ack_point = asoc->advanced_peer_ack_point; 10325 if (cnt_of_space < space_needed) { 10326 /*- 10327 * ok we must trim down the chunk by lowering the 10328 * advance peer ack point. 10329 */ 10330 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10331 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10332 0xff, 0xff, cnt_of_space, 10333 space_needed); 10334 } 10335 cnt_of_skipped = cnt_of_space - sizeof(struct sctp_forward_tsn_chunk); 10336 cnt_of_skipped /= sizeof(struct sctp_strseq); 10337 /*- 10338 * Go through and find the TSN that will be the one 10339 * we report. 10340 */ 10341 at = TAILQ_FIRST(&asoc->sent_queue); 10342 if (at != NULL) { 10343 for (i = 0; i < cnt_of_skipped; i++) { 10344 tp1 = TAILQ_NEXT(at, sctp_next); 10345 if (tp1 == NULL) { 10346 break; 10347 } 10348 at = tp1; 10349 } 10350 } 10351 if (at && SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOG_TRY_ADVANCE) { 10352 sctp_misc_ints(SCTP_FWD_TSN_CHECK, 10353 0xff, cnt_of_skipped, at->rec.data.TSN_seq, 10354 asoc->advanced_peer_ack_point); 10355 } 10356 last = at; 10357 /*- 10358 * last now points to last one I can report, update 10359 * peer ack point 10360 */ 10361 if (last) 10362 advance_peer_ack_point = last->rec.data.TSN_seq; 10363 space_needed = sizeof(struct sctp_forward_tsn_chunk) + 10364 cnt_of_skipped * sizeof(struct sctp_strseq); 10365 } 10366 chk->send_size = space_needed; 10367 /* Setup the chunk */ 10368 fwdtsn = mtod(chk->data, struct sctp_forward_tsn_chunk *); 10369 fwdtsn->ch.chunk_length = htons(chk->send_size); 10370 fwdtsn->ch.chunk_flags = 0; 10371 fwdtsn->ch.chunk_type = SCTP_FORWARD_CUM_TSN; 10372 fwdtsn->new_cumulative_tsn = htonl(advance_peer_ack_point); 10373 SCTP_BUF_LEN(chk->data) = chk->send_size; 10374 fwdtsn++; 10375 /*- 10376 * Move pointer to after the fwdtsn and transfer to the 10377 * strseq pointer. 10378 */ 10379 strseq = (struct sctp_strseq *)fwdtsn; 10380 /*- 10381 * Now populate the strseq list. This is done blindly 10382 * without pulling out duplicate stream info. This is 10383 * inefficent but won't harm the process since the peer will 10384 * look at these in sequence and will thus release anything. 10385 * It could mean we exceed the PMTU and chop off some that 10386 * we could have included.. but this is unlikely (aka 1432/4 10387 * would mean 300+ stream seq's would have to be reported in 10388 * one FWD-TSN. With a bit of work we can later FIX this to 10389 * optimize and pull out duplcates.. but it does add more 10390 * overhead. So for now... not! 10391 */ 10392 at = TAILQ_FIRST(&asoc->sent_queue); 10393 for (i = 0; i < cnt_of_skipped; i++) { 10394 tp1 = TAILQ_NEXT(at, sctp_next); 10395 if (tp1 == NULL) 10396 break; 10397 if (at->rec.data.rcv_flags & SCTP_DATA_UNORDERED) { 10398 /* We don't report these */ 10399 i--; 10400 at = tp1; 10401 continue; 10402 } 10403 if (at->rec.data.TSN_seq == advance_peer_ack_point) { 10404 at->rec.data.fwd_tsn_cnt = 0; 10405 } 10406 strseq->stream = ntohs(at->rec.data.stream_number); 10407 strseq->sequence = ntohs(at->rec.data.stream_seq); 10408 strseq++; 10409 at = tp1; 10410 } 10411 } 10412 return; 10413} 10414 10415void 10416sctp_send_sack(struct sctp_tcb *stcb, int so_locked 10417#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10418 SCTP_UNUSED 10419#endif 10420) 10421{ 10422 /*- 10423 * Queue up a SACK or NR-SACK in the control queue. 10424 * We must first check to see if a SACK or NR-SACK is 10425 * somehow on the control queue. 10426 * If so, we will take and and remove the old one. 10427 */ 10428 struct sctp_association *asoc; 10429 struct sctp_tmit_chunk *chk, *a_chk; 10430 struct sctp_sack_chunk *sack; 10431 struct sctp_nr_sack_chunk *nr_sack; 10432 struct sctp_gap_ack_block *gap_descriptor; 10433 struct sack_track *selector; 10434 int mergeable = 0; 10435 int offset; 10436 caddr_t limit; 10437 uint32_t *dup; 10438 int limit_reached = 0; 10439 unsigned int i, siz, j; 10440 unsigned int num_gap_blocks = 0, num_nr_gap_blocks = 0, space; 10441 int num_dups = 0; 10442 int space_req; 10443 uint32_t highest_tsn; 10444 uint8_t flags; 10445 uint8_t type; 10446 uint8_t tsn_map; 10447 10448 if (stcb->asoc.nrsack_supported == 1) { 10449 type = SCTP_NR_SELECTIVE_ACK; 10450 } else { 10451 type = SCTP_SELECTIVE_ACK; 10452 } 10453 a_chk = NULL; 10454 asoc = &stcb->asoc; 10455 SCTP_TCB_LOCK_ASSERT(stcb); 10456 if (asoc->last_data_chunk_from == NULL) { 10457 /* Hmm we never received anything */ 10458 return; 10459 } 10460 sctp_slide_mapping_arrays(stcb); 10461 sctp_set_rwnd(stcb, asoc); 10462 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 10463 if (chk->rec.chunk_id.id == type) { 10464 /* Hmm, found a sack already on queue, remove it */ 10465 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 10466 asoc->ctrl_queue_cnt--; 10467 a_chk = chk; 10468 if (a_chk->data) { 10469 sctp_m_freem(a_chk->data); 10470 a_chk->data = NULL; 10471 } 10472 if (a_chk->whoTo) { 10473 sctp_free_remote_addr(a_chk->whoTo); 10474 a_chk->whoTo = NULL; 10475 } 10476 break; 10477 } 10478 } 10479 if (a_chk == NULL) { 10480 sctp_alloc_a_chunk(stcb, a_chk); 10481 if (a_chk == NULL) { 10482 /* No memory so we drop the idea, and set a timer */ 10483 if (stcb->asoc.delayed_ack) { 10484 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10485 stcb->sctp_ep, stcb, NULL, 10486 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_3); 10487 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10488 stcb->sctp_ep, stcb, NULL); 10489 } else { 10490 stcb->asoc.send_sack = 1; 10491 } 10492 return; 10493 } 10494 a_chk->copy_by_ref = 0; 10495 a_chk->rec.chunk_id.id = type; 10496 a_chk->rec.chunk_id.can_take_data = 1; 10497 } 10498 /* Clear our pkt counts */ 10499 asoc->data_pkts_seen = 0; 10500 10501 a_chk->flags = 0; 10502 a_chk->asoc = asoc; 10503 a_chk->snd_count = 0; 10504 a_chk->send_size = 0; /* fill in later */ 10505 a_chk->sent = SCTP_DATAGRAM_UNSENT; 10506 a_chk->whoTo = NULL; 10507 10508 if (!(asoc->last_data_chunk_from->dest_state & SCTP_ADDR_REACHABLE)) { 10509 /*- 10510 * Ok, the destination for the SACK is unreachable, lets see if 10511 * we can select an alternate to asoc->last_data_chunk_from 10512 */ 10513 a_chk->whoTo = sctp_find_alternate_net(stcb, asoc->last_data_chunk_from, 0); 10514 if (a_chk->whoTo == NULL) { 10515 /* Nope, no alternate */ 10516 a_chk->whoTo = asoc->last_data_chunk_from; 10517 } 10518 } else { 10519 a_chk->whoTo = asoc->last_data_chunk_from; 10520 } 10521 if (a_chk->whoTo) { 10522 atomic_add_int(&a_chk->whoTo->ref_count, 1); 10523 } 10524 if (SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->highest_tsn_inside_nr_map)) { 10525 highest_tsn = asoc->highest_tsn_inside_map; 10526 } else { 10527 highest_tsn = asoc->highest_tsn_inside_nr_map; 10528 } 10529 if (highest_tsn == asoc->cumulative_tsn) { 10530 /* no gaps */ 10531 if (type == SCTP_SELECTIVE_ACK) { 10532 space_req = sizeof(struct sctp_sack_chunk); 10533 } else { 10534 space_req = sizeof(struct sctp_nr_sack_chunk); 10535 } 10536 } else { 10537 /* gaps get a cluster */ 10538 space_req = MCLBYTES; 10539 } 10540 /* Ok now lets formulate a MBUF with our sack */ 10541 a_chk->data = sctp_get_mbuf_for_msg(space_req, 0, M_NOWAIT, 1, MT_DATA); 10542 if ((a_chk->data == NULL) || 10543 (a_chk->whoTo == NULL)) { 10544 /* rats, no mbuf memory */ 10545 if (a_chk->data) { 10546 /* was a problem with the destination */ 10547 sctp_m_freem(a_chk->data); 10548 a_chk->data = NULL; 10549 } 10550 sctp_free_a_chunk(stcb, a_chk, so_locked); 10551 /* sa_ignore NO_NULL_CHK */ 10552 if (stcb->asoc.delayed_ack) { 10553 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, 10554 stcb->sctp_ep, stcb, NULL, 10555 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_4); 10556 sctp_timer_start(SCTP_TIMER_TYPE_RECV, 10557 stcb->sctp_ep, stcb, NULL); 10558 } else { 10559 stcb->asoc.send_sack = 1; 10560 } 10561 return; 10562 } 10563 /* ok, lets go through and fill it in */ 10564 SCTP_BUF_RESV_UF(a_chk->data, SCTP_MIN_OVERHEAD); 10565 space = M_TRAILINGSPACE(a_chk->data); 10566 if (space > (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD)) { 10567 space = (a_chk->whoTo->mtu - SCTP_MIN_OVERHEAD); 10568 } 10569 limit = mtod(a_chk->data, caddr_t); 10570 limit += space; 10571 10572 flags = 0; 10573 10574 if ((asoc->sctp_cmt_on_off > 0) && 10575 SCTP_BASE_SYSCTL(sctp_cmt_use_dac)) { 10576 /*- 10577 * CMT DAC algorithm: If 2 (i.e., 0x10) packets have been 10578 * received, then set high bit to 1, else 0. Reset 10579 * pkts_rcvd. 10580 */ 10581 flags |= (asoc->cmt_dac_pkts_rcvd << 6); 10582 asoc->cmt_dac_pkts_rcvd = 0; 10583 } 10584#ifdef SCTP_ASOCLOG_OF_TSNS 10585 stcb->asoc.cumack_logsnt[stcb->asoc.cumack_log_atsnt] = asoc->cumulative_tsn; 10586 stcb->asoc.cumack_log_atsnt++; 10587 if (stcb->asoc.cumack_log_atsnt >= SCTP_TSN_LOG_SIZE) { 10588 stcb->asoc.cumack_log_atsnt = 0; 10589 } 10590#endif 10591 /* reset the readers interpretation */ 10592 stcb->freed_by_sorcv_sincelast = 0; 10593 10594 if (type == SCTP_SELECTIVE_ACK) { 10595 sack = mtod(a_chk->data, struct sctp_sack_chunk *); 10596 nr_sack = NULL; 10597 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)sack + sizeof(struct sctp_sack_chunk)); 10598 if (highest_tsn > asoc->mapping_array_base_tsn) { 10599 siz = (((highest_tsn - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10600 } else { 10601 siz = (((MAX_TSN - highest_tsn) + 1) + highest_tsn + 7) / 8; 10602 } 10603 } else { 10604 sack = NULL; 10605 nr_sack = mtod(a_chk->data, struct sctp_nr_sack_chunk *); 10606 gap_descriptor = (struct sctp_gap_ack_block *)((caddr_t)nr_sack + sizeof(struct sctp_nr_sack_chunk)); 10607 if (asoc->highest_tsn_inside_map > asoc->mapping_array_base_tsn) { 10608 siz = (((asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10609 } else { 10610 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_map + 7) / 8; 10611 } 10612 } 10613 10614 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10615 offset = 1; 10616 } else { 10617 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10618 } 10619 if (((type == SCTP_SELECTIVE_ACK) && 10620 SCTP_TSN_GT(highest_tsn, asoc->cumulative_tsn)) || 10621 ((type == SCTP_NR_SELECTIVE_ACK) && 10622 SCTP_TSN_GT(asoc->highest_tsn_inside_map, asoc->cumulative_tsn))) { 10623 /* we have a gap .. maybe */ 10624 for (i = 0; i < siz; i++) { 10625 tsn_map = asoc->mapping_array[i]; 10626 if (type == SCTP_SELECTIVE_ACK) { 10627 tsn_map |= asoc->nr_mapping_array[i]; 10628 } 10629 if (i == 0) { 10630 /* 10631 * Clear all bits corresponding to TSNs 10632 * smaller or equal to the cumulative TSN. 10633 */ 10634 tsn_map &= (~0U << (1 - offset)); 10635 } 10636 selector = &sack_array[tsn_map]; 10637 if (mergeable && selector->right_edge) { 10638 /* 10639 * Backup, left and right edges were ok to 10640 * merge. 10641 */ 10642 num_gap_blocks--; 10643 gap_descriptor--; 10644 } 10645 if (selector->num_entries == 0) 10646 mergeable = 0; 10647 else { 10648 for (j = 0; j < selector->num_entries; j++) { 10649 if (mergeable && selector->right_edge) { 10650 /* 10651 * do a merge by NOT setting 10652 * the left side 10653 */ 10654 mergeable = 0; 10655 } else { 10656 /* 10657 * no merge, set the left 10658 * side 10659 */ 10660 mergeable = 0; 10661 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10662 } 10663 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10664 num_gap_blocks++; 10665 gap_descriptor++; 10666 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10667 /* no more room */ 10668 limit_reached = 1; 10669 break; 10670 } 10671 } 10672 if (selector->left_edge) { 10673 mergeable = 1; 10674 } 10675 } 10676 if (limit_reached) { 10677 /* Reached the limit stop */ 10678 break; 10679 } 10680 offset += 8; 10681 } 10682 } 10683 if ((type == SCTP_NR_SELECTIVE_ACK) && 10684 (limit_reached == 0)) { 10685 10686 mergeable = 0; 10687 10688 if (asoc->highest_tsn_inside_nr_map > asoc->mapping_array_base_tsn) { 10689 siz = (((asoc->highest_tsn_inside_nr_map - asoc->mapping_array_base_tsn) + 1) + 7) / 8; 10690 } else { 10691 siz = (((MAX_TSN - asoc->mapping_array_base_tsn) + 1) + asoc->highest_tsn_inside_nr_map + 7) / 8; 10692 } 10693 10694 if (SCTP_TSN_GT(asoc->mapping_array_base_tsn, asoc->cumulative_tsn)) { 10695 offset = 1; 10696 } else { 10697 offset = asoc->mapping_array_base_tsn - asoc->cumulative_tsn; 10698 } 10699 if (SCTP_TSN_GT(asoc->highest_tsn_inside_nr_map, asoc->cumulative_tsn)) { 10700 /* we have a gap .. maybe */ 10701 for (i = 0; i < siz; i++) { 10702 tsn_map = asoc->nr_mapping_array[i]; 10703 if (i == 0) { 10704 /* 10705 * Clear all bits corresponding to 10706 * TSNs smaller or equal to the 10707 * cumulative TSN. 10708 */ 10709 tsn_map &= (~0U << (1 - offset)); 10710 } 10711 selector = &sack_array[tsn_map]; 10712 if (mergeable && selector->right_edge) { 10713 /* 10714 * Backup, left and right edges were 10715 * ok to merge. 10716 */ 10717 num_nr_gap_blocks--; 10718 gap_descriptor--; 10719 } 10720 if (selector->num_entries == 0) 10721 mergeable = 0; 10722 else { 10723 for (j = 0; j < selector->num_entries; j++) { 10724 if (mergeable && selector->right_edge) { 10725 /* 10726 * do a merge by NOT 10727 * setting the left 10728 * side 10729 */ 10730 mergeable = 0; 10731 } else { 10732 /* 10733 * no merge, set the 10734 * left side 10735 */ 10736 mergeable = 0; 10737 gap_descriptor->start = htons((selector->gaps[j].start + offset)); 10738 } 10739 gap_descriptor->end = htons((selector->gaps[j].end + offset)); 10740 num_nr_gap_blocks++; 10741 gap_descriptor++; 10742 if (((caddr_t)gap_descriptor + sizeof(struct sctp_gap_ack_block)) > limit) { 10743 /* no more room */ 10744 limit_reached = 1; 10745 break; 10746 } 10747 } 10748 if (selector->left_edge) { 10749 mergeable = 1; 10750 } 10751 } 10752 if (limit_reached) { 10753 /* Reached the limit stop */ 10754 break; 10755 } 10756 offset += 8; 10757 } 10758 } 10759 } 10760 /* now we must add any dups we are going to report. */ 10761 if ((limit_reached == 0) && (asoc->numduptsns)) { 10762 dup = (uint32_t *) gap_descriptor; 10763 for (i = 0; i < asoc->numduptsns; i++) { 10764 *dup = htonl(asoc->dup_tsns[i]); 10765 dup++; 10766 num_dups++; 10767 if (((caddr_t)dup + sizeof(uint32_t)) > limit) { 10768 /* no more room */ 10769 break; 10770 } 10771 } 10772 asoc->numduptsns = 0; 10773 } 10774 /* 10775 * now that the chunk is prepared queue it to the control chunk 10776 * queue. 10777 */ 10778 if (type == SCTP_SELECTIVE_ACK) { 10779 a_chk->send_size = sizeof(struct sctp_sack_chunk) + 10780 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10781 num_dups * sizeof(int32_t); 10782 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10783 sack->sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10784 sack->sack.a_rwnd = htonl(asoc->my_rwnd); 10785 sack->sack.num_gap_ack_blks = htons(num_gap_blocks); 10786 sack->sack.num_dup_tsns = htons(num_dups); 10787 sack->ch.chunk_type = type; 10788 sack->ch.chunk_flags = flags; 10789 sack->ch.chunk_length = htons(a_chk->send_size); 10790 } else { 10791 a_chk->send_size = sizeof(struct sctp_nr_sack_chunk) + 10792 (num_gap_blocks + num_nr_gap_blocks) * sizeof(struct sctp_gap_ack_block) + 10793 num_dups * sizeof(int32_t); 10794 SCTP_BUF_LEN(a_chk->data) = a_chk->send_size; 10795 nr_sack->nr_sack.cum_tsn_ack = htonl(asoc->cumulative_tsn); 10796 nr_sack->nr_sack.a_rwnd = htonl(asoc->my_rwnd); 10797 nr_sack->nr_sack.num_gap_ack_blks = htons(num_gap_blocks); 10798 nr_sack->nr_sack.num_nr_gap_ack_blks = htons(num_nr_gap_blocks); 10799 nr_sack->nr_sack.num_dup_tsns = htons(num_dups); 10800 nr_sack->nr_sack.reserved = 0; 10801 nr_sack->ch.chunk_type = type; 10802 nr_sack->ch.chunk_flags = flags; 10803 nr_sack->ch.chunk_length = htons(a_chk->send_size); 10804 } 10805 TAILQ_INSERT_TAIL(&asoc->control_send_queue, a_chk, sctp_next); 10806 asoc->my_last_reported_rwnd = asoc->my_rwnd; 10807 asoc->ctrl_queue_cnt++; 10808 asoc->send_sack = 0; 10809 SCTP_STAT_INCR(sctps_sendsacks); 10810 return; 10811} 10812 10813void 10814sctp_send_abort_tcb(struct sctp_tcb *stcb, struct mbuf *operr, int so_locked 10815#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 10816 SCTP_UNUSED 10817#endif 10818) 10819{ 10820 struct mbuf *m_abort, *m, *m_last; 10821 struct mbuf *m_out, *m_end = NULL; 10822 struct sctp_abort_chunk *abort; 10823 struct sctp_auth_chunk *auth = NULL; 10824 struct sctp_nets *net; 10825 uint32_t vtag; 10826 uint32_t auth_offset = 0; 10827 uint16_t cause_len, chunk_len, padding_len; 10828 10829 SCTP_TCB_LOCK_ASSERT(stcb); 10830 /*- 10831 * Add an AUTH chunk, if chunk requires it and save the offset into 10832 * the chain for AUTH 10833 */ 10834 if (sctp_auth_is_required_chunk(SCTP_ABORT_ASSOCIATION, 10835 stcb->asoc.peer_auth_chunks)) { 10836 m_out = sctp_add_auth_chunk(NULL, &m_end, &auth, &auth_offset, 10837 stcb, SCTP_ABORT_ASSOCIATION); 10838 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10839 } else { 10840 m_out = NULL; 10841 } 10842 m_abort = sctp_get_mbuf_for_msg(sizeof(struct sctp_abort_chunk), 0, M_NOWAIT, 1, MT_HEADER); 10843 if (m_abort == NULL) { 10844 if (m_out) { 10845 sctp_m_freem(m_out); 10846 } 10847 if (operr) { 10848 sctp_m_freem(operr); 10849 } 10850 return; 10851 } 10852 /* link in any error */ 10853 SCTP_BUF_NEXT(m_abort) = operr; 10854 cause_len = 0; 10855 m_last = NULL; 10856 for (m = operr; m; m = SCTP_BUF_NEXT(m)) { 10857 cause_len += (uint16_t) SCTP_BUF_LEN(m); 10858 if (SCTP_BUF_NEXT(m) == NULL) { 10859 m_last = m; 10860 } 10861 } 10862 SCTP_BUF_LEN(m_abort) = sizeof(struct sctp_abort_chunk); 10863 chunk_len = (uint16_t) sizeof(struct sctp_abort_chunk) + cause_len; 10864 padding_len = SCTP_SIZE32(chunk_len) - chunk_len; 10865 if (m_out == NULL) { 10866 /* NO Auth chunk prepended, so reserve space in front */ 10867 SCTP_BUF_RESV_UF(m_abort, SCTP_MIN_OVERHEAD); 10868 m_out = m_abort; 10869 } else { 10870 /* Put AUTH chunk at the front of the chain */ 10871 SCTP_BUF_NEXT(m_end) = m_abort; 10872 } 10873 if (stcb->asoc.alternate) { 10874 net = stcb->asoc.alternate; 10875 } else { 10876 net = stcb->asoc.primary_destination; 10877 } 10878 /* Fill in the ABORT chunk header. */ 10879 abort = mtod(m_abort, struct sctp_abort_chunk *); 10880 abort->ch.chunk_type = SCTP_ABORT_ASSOCIATION; 10881 if (stcb->asoc.peer_vtag == 0) { 10882 /* This happens iff the assoc is in COOKIE-WAIT state. */ 10883 vtag = stcb->asoc.my_vtag; 10884 abort->ch.chunk_flags = SCTP_HAD_NO_TCB; 10885 } else { 10886 vtag = stcb->asoc.peer_vtag; 10887 abort->ch.chunk_flags = 0; 10888 } 10889 abort->ch.chunk_length = htons(chunk_len); 10890 /* Add padding, if necessary. */ 10891 if (padding_len > 0) { 10892 if ((m_last == NULL) || 10893 (sctp_add_pad_tombuf(m_last, padding_len) == NULL)) { 10894 sctp_m_freem(m_out); 10895 return; 10896 } 10897 } 10898 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10899 (struct sockaddr *)&net->ro._l_addr, 10900 m_out, auth_offset, auth, stcb->asoc.authinfo.active_keyid, 1, 0, 0, 10901 stcb->sctp_ep->sctp_lport, stcb->rport, htonl(vtag), 10902 stcb->asoc.primary_destination->port, NULL, 10903 0, 0, 10904 so_locked); 10905 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10906} 10907 10908void 10909sctp_send_shutdown_complete(struct sctp_tcb *stcb, 10910 struct sctp_nets *net, 10911 int reflect_vtag) 10912{ 10913 /* formulate and SEND a SHUTDOWN-COMPLETE */ 10914 struct mbuf *m_shutdown_comp; 10915 struct sctp_shutdown_complete_chunk *shutdown_complete; 10916 uint32_t vtag; 10917 uint8_t flags; 10918 10919 m_shutdown_comp = sctp_get_mbuf_for_msg(sizeof(struct sctp_chunkhdr), 0, M_NOWAIT, 1, MT_HEADER); 10920 if (m_shutdown_comp == NULL) { 10921 /* no mbuf's */ 10922 return; 10923 } 10924 if (reflect_vtag) { 10925 flags = SCTP_HAD_NO_TCB; 10926 vtag = stcb->asoc.my_vtag; 10927 } else { 10928 flags = 0; 10929 vtag = stcb->asoc.peer_vtag; 10930 } 10931 shutdown_complete = mtod(m_shutdown_comp, struct sctp_shutdown_complete_chunk *); 10932 shutdown_complete->ch.chunk_type = SCTP_SHUTDOWN_COMPLETE; 10933 shutdown_complete->ch.chunk_flags = flags; 10934 shutdown_complete->ch.chunk_length = htons(sizeof(struct sctp_shutdown_complete_chunk)); 10935 SCTP_BUF_LEN(m_shutdown_comp) = sizeof(struct sctp_shutdown_complete_chunk); 10936 (void)sctp_lowlevel_chunk_output(stcb->sctp_ep, stcb, net, 10937 (struct sockaddr *)&net->ro._l_addr, 10938 m_shutdown_comp, 0, NULL, 0, 1, 0, 0, 10939 stcb->sctp_ep->sctp_lport, stcb->rport, 10940 htonl(vtag), 10941 net->port, NULL, 10942 0, 0, 10943 SCTP_SO_NOT_LOCKED); 10944 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 10945 return; 10946} 10947 10948static void 10949sctp_send_resp_msg(struct sockaddr *src, struct sockaddr *dst, 10950 struct sctphdr *sh, uint32_t vtag, 10951 uint8_t type, struct mbuf *cause, 10952 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 10953 uint32_t vrf_id, uint16_t port) 10954{ 10955 struct mbuf *o_pak; 10956 struct mbuf *mout; 10957 struct sctphdr *shout; 10958 struct sctp_chunkhdr *ch; 10959 10960#if defined(INET) || defined(INET6) 10961 struct udphdr *udp; 10962 int ret; 10963 10964#endif 10965 int len, cause_len, padding_len; 10966 10967#ifdef INET 10968 struct sockaddr_in *src_sin, *dst_sin; 10969 struct ip *ip; 10970 10971#endif 10972#ifdef INET6 10973 struct sockaddr_in6 *src_sin6, *dst_sin6; 10974 struct ip6_hdr *ip6; 10975 10976#endif 10977 10978 /* Compute the length of the cause and add final padding. */ 10979 cause_len = 0; 10980 if (cause != NULL) { 10981 struct mbuf *m_at, *m_last = NULL; 10982 10983 for (m_at = cause; m_at; m_at = SCTP_BUF_NEXT(m_at)) { 10984 if (SCTP_BUF_NEXT(m_at) == NULL) 10985 m_last = m_at; 10986 cause_len += SCTP_BUF_LEN(m_at); 10987 } 10988 padding_len = cause_len % 4; 10989 if (padding_len != 0) { 10990 padding_len = 4 - padding_len; 10991 } 10992 if (padding_len != 0) { 10993 if (sctp_add_pad_tombuf(m_last, padding_len) == NULL) { 10994 sctp_m_freem(cause); 10995 return; 10996 } 10997 } 10998 } else { 10999 padding_len = 0; 11000 } 11001 /* Get an mbuf for the header. */ 11002 len = sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr); 11003 switch (dst->sa_family) { 11004#ifdef INET 11005 case AF_INET: 11006 len += sizeof(struct ip); 11007 break; 11008#endif 11009#ifdef INET6 11010 case AF_INET6: 11011 len += sizeof(struct ip6_hdr); 11012 break; 11013#endif 11014 default: 11015 break; 11016 } 11017#if defined(INET) || defined(INET6) 11018 if (port) { 11019 len += sizeof(struct udphdr); 11020 } 11021#endif 11022 mout = sctp_get_mbuf_for_msg(len + max_linkhdr, 1, M_NOWAIT, 1, MT_DATA); 11023 if (mout == NULL) { 11024 if (cause) { 11025 sctp_m_freem(cause); 11026 } 11027 return; 11028 } 11029 SCTP_BUF_RESV_UF(mout, max_linkhdr); 11030 SCTP_BUF_LEN(mout) = len; 11031 SCTP_BUF_NEXT(mout) = cause; 11032 M_SETFIB(mout, fibnum); 11033 mout->m_pkthdr.flowid = mflowid; 11034 M_HASHTYPE_SET(mout, mflowtype); 11035#ifdef INET 11036 ip = NULL; 11037#endif 11038#ifdef INET6 11039 ip6 = NULL; 11040#endif 11041 switch (dst->sa_family) { 11042#ifdef INET 11043 case AF_INET: 11044 src_sin = (struct sockaddr_in *)src; 11045 dst_sin = (struct sockaddr_in *)dst; 11046 ip = mtod(mout, struct ip *); 11047 ip->ip_v = IPVERSION; 11048 ip->ip_hl = (sizeof(struct ip) >> 2); 11049 ip->ip_tos = 0; 11050 ip->ip_id = ip_newid(); 11051 ip->ip_off = 0; 11052 ip->ip_ttl = MODULE_GLOBAL(ip_defttl); 11053 if (port) { 11054 ip->ip_p = IPPROTO_UDP; 11055 } else { 11056 ip->ip_p = IPPROTO_SCTP; 11057 } 11058 ip->ip_src.s_addr = dst_sin->sin_addr.s_addr; 11059 ip->ip_dst.s_addr = src_sin->sin_addr.s_addr; 11060 ip->ip_sum = 0; 11061 len = sizeof(struct ip); 11062 shout = (struct sctphdr *)((caddr_t)ip + len); 11063 break; 11064#endif 11065#ifdef INET6 11066 case AF_INET6: 11067 src_sin6 = (struct sockaddr_in6 *)src; 11068 dst_sin6 = (struct sockaddr_in6 *)dst; 11069 ip6 = mtod(mout, struct ip6_hdr *); 11070 ip6->ip6_flow = htonl(0x60000000); 11071 if (V_ip6_auto_flowlabel) { 11072 ip6->ip6_flow |= (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 11073 } 11074 ip6->ip6_hlim = MODULE_GLOBAL(ip6_defhlim); 11075 if (port) { 11076 ip6->ip6_nxt = IPPROTO_UDP; 11077 } else { 11078 ip6->ip6_nxt = IPPROTO_SCTP; 11079 } 11080 ip6->ip6_src = dst_sin6->sin6_addr; 11081 ip6->ip6_dst = src_sin6->sin6_addr; 11082 len = sizeof(struct ip6_hdr); 11083 shout = (struct sctphdr *)((caddr_t)ip6 + len); 11084 break; 11085#endif 11086 default: 11087 len = 0; 11088 shout = mtod(mout, struct sctphdr *); 11089 break; 11090 } 11091#if defined(INET) || defined(INET6) 11092 if (port) { 11093 if (htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)) == 0) { 11094 sctp_m_freem(mout); 11095 return; 11096 } 11097 udp = (struct udphdr *)shout; 11098 udp->uh_sport = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 11099 udp->uh_dport = port; 11100 udp->uh_sum = 0; 11101 udp->uh_ulen = htons(sizeof(struct udphdr) + 11102 sizeof(struct sctphdr) + 11103 sizeof(struct sctp_chunkhdr) + 11104 cause_len + padding_len); 11105 len += sizeof(struct udphdr); 11106 shout = (struct sctphdr *)((caddr_t)shout + sizeof(struct udphdr)); 11107 } else { 11108 udp = NULL; 11109 } 11110#endif 11111 shout->src_port = sh->dest_port; 11112 shout->dest_port = sh->src_port; 11113 shout->checksum = 0; 11114 if (vtag) { 11115 shout->v_tag = htonl(vtag); 11116 } else { 11117 shout->v_tag = sh->v_tag; 11118 } 11119 len += sizeof(struct sctphdr); 11120 ch = (struct sctp_chunkhdr *)((caddr_t)shout + sizeof(struct sctphdr)); 11121 ch->chunk_type = type; 11122 if (vtag) { 11123 ch->chunk_flags = 0; 11124 } else { 11125 ch->chunk_flags = SCTP_HAD_NO_TCB; 11126 } 11127 ch->chunk_length = htons(sizeof(struct sctp_chunkhdr) + cause_len); 11128 len += sizeof(struct sctp_chunkhdr); 11129 len += cause_len + padding_len; 11130 11131 if (SCTP_GET_HEADER_FOR_OUTPUT(o_pak)) { 11132 sctp_m_freem(mout); 11133 return; 11134 } 11135 SCTP_ATTACH_CHAIN(o_pak, mout, len); 11136 switch (dst->sa_family) { 11137#ifdef INET 11138 case AF_INET: 11139 if (port) { 11140 if (V_udp_cksum) { 11141 udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, udp->uh_ulen + htons(IPPROTO_UDP)); 11142 } else { 11143 udp->uh_sum = 0; 11144 } 11145 } 11146 ip->ip_len = htons(len); 11147 if (port) { 11148#if defined(SCTP_WITH_NO_CSUM) 11149 SCTP_STAT_INCR(sctps_sendnocrc); 11150#else 11151 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip) + sizeof(struct udphdr)); 11152 SCTP_STAT_INCR(sctps_sendswcrc); 11153#endif 11154 if (V_udp_cksum) { 11155 SCTP_ENABLE_UDP_CSUM(o_pak); 11156 } 11157 } else { 11158#if defined(SCTP_WITH_NO_CSUM) 11159 SCTP_STAT_INCR(sctps_sendnocrc); 11160#else 11161 mout->m_pkthdr.csum_flags = CSUM_SCTP; 11162 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11163 SCTP_STAT_INCR(sctps_sendhwcrc); 11164#endif 11165 } 11166#ifdef SCTP_PACKET_LOGGING 11167 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11168 sctp_packet_log(o_pak); 11169 } 11170#endif 11171 SCTP_IP_OUTPUT(ret, o_pak, NULL, NULL, vrf_id); 11172 break; 11173#endif 11174#ifdef INET6 11175 case AF_INET6: 11176 ip6->ip6_plen = len - sizeof(struct ip6_hdr); 11177 if (port) { 11178#if defined(SCTP_WITH_NO_CSUM) 11179 SCTP_STAT_INCR(sctps_sendnocrc); 11180#else 11181 shout->checksum = sctp_calculate_cksum(mout, sizeof(struct ip6_hdr) + sizeof(struct udphdr)); 11182 SCTP_STAT_INCR(sctps_sendswcrc); 11183#endif 11184 if ((udp->uh_sum = in6_cksum(o_pak, IPPROTO_UDP, sizeof(struct ip6_hdr), len - sizeof(struct ip6_hdr))) == 0) { 11185 udp->uh_sum = 0xffff; 11186 } 11187 } else { 11188#if defined(SCTP_WITH_NO_CSUM) 11189 SCTP_STAT_INCR(sctps_sendnocrc); 11190#else 11191 mout->m_pkthdr.csum_flags = CSUM_SCTP_IPV6; 11192 mout->m_pkthdr.csum_data = offsetof(struct sctphdr, checksum); 11193 SCTP_STAT_INCR(sctps_sendhwcrc); 11194#endif 11195 } 11196#ifdef SCTP_PACKET_LOGGING 11197 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) { 11198 sctp_packet_log(o_pak); 11199 } 11200#endif 11201 SCTP_IP6_OUTPUT(ret, o_pak, NULL, NULL, NULL, vrf_id); 11202 break; 11203#endif 11204 default: 11205 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Unknown protocol (TSNH) type %d\n", 11206 dst->sa_family); 11207 sctp_m_freem(mout); 11208 SCTP_LTRACE_ERR_RET_PKT(mout, NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EFAULT); 11209 return; 11210 } 11211 SCTP_STAT_INCR(sctps_sendpackets); 11212 SCTP_STAT_INCR_COUNTER64(sctps_outpackets); 11213 SCTP_STAT_INCR_COUNTER64(sctps_outcontrolchunks); 11214 return; 11215} 11216 11217void 11218sctp_send_shutdown_complete2(struct sockaddr *src, struct sockaddr *dst, 11219 struct sctphdr *sh, 11220 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 11221 uint32_t vrf_id, uint16_t port) 11222{ 11223 sctp_send_resp_msg(src, dst, sh, 0, SCTP_SHUTDOWN_COMPLETE, NULL, 11224 mflowtype, mflowid, fibnum, 11225 vrf_id, port); 11226} 11227 11228void 11229sctp_send_hb(struct sctp_tcb *stcb, struct sctp_nets *net, int so_locked 11230#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING) 11231 SCTP_UNUSED 11232#endif 11233) 11234{ 11235 struct sctp_tmit_chunk *chk; 11236 struct sctp_heartbeat_chunk *hb; 11237 struct timeval now; 11238 11239 SCTP_TCB_LOCK_ASSERT(stcb); 11240 if (net == NULL) { 11241 return; 11242 } 11243 (void)SCTP_GETTIME_TIMEVAL(&now); 11244 switch (net->ro._l_addr.sa.sa_family) { 11245#ifdef INET 11246 case AF_INET: 11247 break; 11248#endif 11249#ifdef INET6 11250 case AF_INET6: 11251 break; 11252#endif 11253 default: 11254 return; 11255 } 11256 sctp_alloc_a_chunk(stcb, chk); 11257 if (chk == NULL) { 11258 SCTPDBG(SCTP_DEBUG_OUTPUT4, "Gak, can't get a chunk for hb\n"); 11259 return; 11260 } 11261 chk->copy_by_ref = 0; 11262 chk->rec.chunk_id.id = SCTP_HEARTBEAT_REQUEST; 11263 chk->rec.chunk_id.can_take_data = 1; 11264 chk->flags = 0; 11265 chk->asoc = &stcb->asoc; 11266 chk->send_size = sizeof(struct sctp_heartbeat_chunk); 11267 11268 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11269 if (chk->data == NULL) { 11270 sctp_free_a_chunk(stcb, chk, so_locked); 11271 return; 11272 } 11273 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11274 SCTP_BUF_LEN(chk->data) = chk->send_size; 11275 chk->sent = SCTP_DATAGRAM_UNSENT; 11276 chk->snd_count = 0; 11277 chk->whoTo = net; 11278 atomic_add_int(&chk->whoTo->ref_count, 1); 11279 /* Now we have a mbuf that we can fill in with the details */ 11280 hb = mtod(chk->data, struct sctp_heartbeat_chunk *); 11281 memset(hb, 0, sizeof(struct sctp_heartbeat_chunk)); 11282 /* fill out chunk header */ 11283 hb->ch.chunk_type = SCTP_HEARTBEAT_REQUEST; 11284 hb->ch.chunk_flags = 0; 11285 hb->ch.chunk_length = htons(chk->send_size); 11286 /* Fill out hb parameter */ 11287 hb->heartbeat.hb_info.ph.param_type = htons(SCTP_HEARTBEAT_INFO); 11288 hb->heartbeat.hb_info.ph.param_length = htons(sizeof(struct sctp_heartbeat_info_param)); 11289 hb->heartbeat.hb_info.time_value_1 = now.tv_sec; 11290 hb->heartbeat.hb_info.time_value_2 = now.tv_usec; 11291 /* Did our user request this one, put it in */ 11292 hb->heartbeat.hb_info.addr_family = (uint8_t) net->ro._l_addr.sa.sa_family; 11293 hb->heartbeat.hb_info.addr_len = net->ro._l_addr.sa.sa_len; 11294 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 11295 /* 11296 * we only take from the entropy pool if the address is not 11297 * confirmed. 11298 */ 11299 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11300 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = sctp_select_initial_TSN(&stcb->sctp_ep->sctp_ep); 11301 } else { 11302 net->heartbeat_random1 = hb->heartbeat.hb_info.random_value1 = 0; 11303 net->heartbeat_random2 = hb->heartbeat.hb_info.random_value2 = 0; 11304 } 11305 switch (net->ro._l_addr.sa.sa_family) { 11306#ifdef INET 11307 case AF_INET: 11308 memcpy(hb->heartbeat.hb_info.address, 11309 &net->ro._l_addr.sin.sin_addr, 11310 sizeof(net->ro._l_addr.sin.sin_addr)); 11311 break; 11312#endif 11313#ifdef INET6 11314 case AF_INET6: 11315 memcpy(hb->heartbeat.hb_info.address, 11316 &net->ro._l_addr.sin6.sin6_addr, 11317 sizeof(net->ro._l_addr.sin6.sin6_addr)); 11318 break; 11319#endif 11320 default: 11321 if (chk->data) { 11322 sctp_m_freem(chk->data); 11323 chk->data = NULL; 11324 } 11325 sctp_free_a_chunk(stcb, chk, so_locked); 11326 return; 11327 break; 11328 } 11329 net->hb_responded = 0; 11330 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11331 stcb->asoc.ctrl_queue_cnt++; 11332 SCTP_STAT_INCR(sctps_sendheartbeat); 11333 return; 11334} 11335 11336void 11337sctp_send_ecn_echo(struct sctp_tcb *stcb, struct sctp_nets *net, 11338 uint32_t high_tsn) 11339{ 11340 struct sctp_association *asoc; 11341 struct sctp_ecne_chunk *ecne; 11342 struct sctp_tmit_chunk *chk; 11343 11344 if (net == NULL) { 11345 return; 11346 } 11347 asoc = &stcb->asoc; 11348 SCTP_TCB_LOCK_ASSERT(stcb); 11349 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11350 if ((chk->rec.chunk_id.id == SCTP_ECN_ECHO) && (net == chk->whoTo)) { 11351 /* found a previous ECN_ECHO update it if needed */ 11352 uint32_t cnt, ctsn; 11353 11354 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11355 ctsn = ntohl(ecne->tsn); 11356 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11357 ecne->tsn = htonl(high_tsn); 11358 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11359 } 11360 cnt = ntohl(ecne->num_pkts_since_cwr); 11361 cnt++; 11362 ecne->num_pkts_since_cwr = htonl(cnt); 11363 return; 11364 } 11365 } 11366 /* nope could not find one to update so we must build one */ 11367 sctp_alloc_a_chunk(stcb, chk); 11368 if (chk == NULL) { 11369 return; 11370 } 11371 SCTP_STAT_INCR(sctps_queue_upd_ecne); 11372 chk->copy_by_ref = 0; 11373 chk->rec.chunk_id.id = SCTP_ECN_ECHO; 11374 chk->rec.chunk_id.can_take_data = 0; 11375 chk->flags = 0; 11376 chk->asoc = &stcb->asoc; 11377 chk->send_size = sizeof(struct sctp_ecne_chunk); 11378 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11379 if (chk->data == NULL) { 11380 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11381 return; 11382 } 11383 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11384 SCTP_BUF_LEN(chk->data) = chk->send_size; 11385 chk->sent = SCTP_DATAGRAM_UNSENT; 11386 chk->snd_count = 0; 11387 chk->whoTo = net; 11388 atomic_add_int(&chk->whoTo->ref_count, 1); 11389 11390 stcb->asoc.ecn_echo_cnt_onq++; 11391 ecne = mtod(chk->data, struct sctp_ecne_chunk *); 11392 ecne->ch.chunk_type = SCTP_ECN_ECHO; 11393 ecne->ch.chunk_flags = 0; 11394 ecne->ch.chunk_length = htons(sizeof(struct sctp_ecne_chunk)); 11395 ecne->tsn = htonl(high_tsn); 11396 ecne->num_pkts_since_cwr = htonl(1); 11397 TAILQ_INSERT_HEAD(&stcb->asoc.control_send_queue, chk, sctp_next); 11398 asoc->ctrl_queue_cnt++; 11399} 11400 11401void 11402sctp_send_packet_dropped(struct sctp_tcb *stcb, struct sctp_nets *net, 11403 struct mbuf *m, int len, int iphlen, int bad_crc) 11404{ 11405 struct sctp_association *asoc; 11406 struct sctp_pktdrop_chunk *drp; 11407 struct sctp_tmit_chunk *chk; 11408 uint8_t *datap; 11409 int was_trunc = 0; 11410 int fullsz = 0; 11411 long spc; 11412 int offset; 11413 struct sctp_chunkhdr *ch, chunk_buf; 11414 unsigned int chk_length; 11415 11416 if (!stcb) { 11417 return; 11418 } 11419 asoc = &stcb->asoc; 11420 SCTP_TCB_LOCK_ASSERT(stcb); 11421 if (asoc->pktdrop_supported == 0) { 11422 /*- 11423 * peer must declare support before I send one. 11424 */ 11425 return; 11426 } 11427 if (stcb->sctp_socket == NULL) { 11428 return; 11429 } 11430 sctp_alloc_a_chunk(stcb, chk); 11431 if (chk == NULL) { 11432 return; 11433 } 11434 chk->copy_by_ref = 0; 11435 chk->rec.chunk_id.id = SCTP_PACKET_DROPPED; 11436 chk->rec.chunk_id.can_take_data = 1; 11437 chk->flags = 0; 11438 len -= iphlen; 11439 chk->send_size = len; 11440 /* Validate that we do not have an ABORT in here. */ 11441 offset = iphlen + sizeof(struct sctphdr); 11442 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11443 sizeof(*ch), (uint8_t *) & chunk_buf); 11444 while (ch != NULL) { 11445 chk_length = ntohs(ch->chunk_length); 11446 if (chk_length < sizeof(*ch)) { 11447 /* break to abort land */ 11448 break; 11449 } 11450 switch (ch->chunk_type) { 11451 case SCTP_PACKET_DROPPED: 11452 case SCTP_ABORT_ASSOCIATION: 11453 case SCTP_INITIATION_ACK: 11454 /** 11455 * We don't respond with an PKT-DROP to an ABORT 11456 * or PKT-DROP. We also do not respond to an 11457 * INIT-ACK, because we can't know if the initiation 11458 * tag is correct or not. 11459 */ 11460 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11461 return; 11462 default: 11463 break; 11464 } 11465 offset += SCTP_SIZE32(chk_length); 11466 ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, 11467 sizeof(*ch), (uint8_t *) & chunk_buf); 11468 } 11469 11470 if ((len + SCTP_MAX_OVERHEAD + sizeof(struct sctp_pktdrop_chunk)) > 11471 min(stcb->asoc.smallest_mtu, MCLBYTES)) { 11472 /* 11473 * only send 1 mtu worth, trim off the excess on the end. 11474 */ 11475 fullsz = len; 11476 len = min(stcb->asoc.smallest_mtu, MCLBYTES) - SCTP_MAX_OVERHEAD; 11477 was_trunc = 1; 11478 } 11479 chk->asoc = &stcb->asoc; 11480 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11481 if (chk->data == NULL) { 11482jump_out: 11483 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11484 return; 11485 } 11486 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11487 drp = mtod(chk->data, struct sctp_pktdrop_chunk *); 11488 if (drp == NULL) { 11489 sctp_m_freem(chk->data); 11490 chk->data = NULL; 11491 goto jump_out; 11492 } 11493 chk->book_size = SCTP_SIZE32((chk->send_size + sizeof(struct sctp_pktdrop_chunk) + 11494 sizeof(struct sctphdr) + SCTP_MED_OVERHEAD)); 11495 chk->book_size_scale = 0; 11496 if (was_trunc) { 11497 drp->ch.chunk_flags = SCTP_PACKET_TRUNCATED; 11498 drp->trunc_len = htons(fullsz); 11499 /* 11500 * Len is already adjusted to size minus overhead above take 11501 * out the pkt_drop chunk itself from it. 11502 */ 11503 chk->send_size = len - sizeof(struct sctp_pktdrop_chunk); 11504 len = chk->send_size; 11505 } else { 11506 /* no truncation needed */ 11507 drp->ch.chunk_flags = 0; 11508 drp->trunc_len = htons(0); 11509 } 11510 if (bad_crc) { 11511 drp->ch.chunk_flags |= SCTP_BADCRC; 11512 } 11513 chk->send_size += sizeof(struct sctp_pktdrop_chunk); 11514 SCTP_BUF_LEN(chk->data) = chk->send_size; 11515 chk->sent = SCTP_DATAGRAM_UNSENT; 11516 chk->snd_count = 0; 11517 if (net) { 11518 /* we should hit here */ 11519 chk->whoTo = net; 11520 atomic_add_int(&chk->whoTo->ref_count, 1); 11521 } else { 11522 chk->whoTo = NULL; 11523 } 11524 drp->ch.chunk_type = SCTP_PACKET_DROPPED; 11525 drp->ch.chunk_length = htons(chk->send_size); 11526 spc = SCTP_SB_LIMIT_RCV(stcb->sctp_socket); 11527 if (spc < 0) { 11528 spc = 0; 11529 } 11530 drp->bottle_bw = htonl(spc); 11531 if (asoc->my_rwnd) { 11532 drp->current_onq = htonl(asoc->size_on_reasm_queue + 11533 asoc->size_on_all_streams + 11534 asoc->my_rwnd_control_len + 11535 stcb->sctp_socket->so_rcv.sb_cc); 11536 } else { 11537 /*- 11538 * If my rwnd is 0, possibly from mbuf depletion as well as 11539 * space used, tell the peer there is NO space aka onq == bw 11540 */ 11541 drp->current_onq = htonl(spc); 11542 } 11543 drp->reserved = 0; 11544 datap = drp->data; 11545 m_copydata(m, iphlen, len, (caddr_t)datap); 11546 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11547 asoc->ctrl_queue_cnt++; 11548} 11549 11550void 11551sctp_send_cwr(struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t high_tsn, uint8_t override) 11552{ 11553 struct sctp_association *asoc; 11554 struct sctp_cwr_chunk *cwr; 11555 struct sctp_tmit_chunk *chk; 11556 11557 SCTP_TCB_LOCK_ASSERT(stcb); 11558 if (net == NULL) { 11559 return; 11560 } 11561 asoc = &stcb->asoc; 11562 TAILQ_FOREACH(chk, &asoc->control_send_queue, sctp_next) { 11563 if ((chk->rec.chunk_id.id == SCTP_ECN_CWR) && (net == chk->whoTo)) { 11564 /* 11565 * found a previous CWR queued to same destination 11566 * update it if needed 11567 */ 11568 uint32_t ctsn; 11569 11570 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11571 ctsn = ntohl(cwr->tsn); 11572 if (SCTP_TSN_GT(high_tsn, ctsn)) { 11573 cwr->tsn = htonl(high_tsn); 11574 } 11575 if (override & SCTP_CWR_REDUCE_OVERRIDE) { 11576 /* Make sure override is carried */ 11577 cwr->ch.chunk_flags |= SCTP_CWR_REDUCE_OVERRIDE; 11578 } 11579 return; 11580 } 11581 } 11582 sctp_alloc_a_chunk(stcb, chk); 11583 if (chk == NULL) { 11584 return; 11585 } 11586 chk->copy_by_ref = 0; 11587 chk->rec.chunk_id.id = SCTP_ECN_CWR; 11588 chk->rec.chunk_id.can_take_data = 1; 11589 chk->flags = 0; 11590 chk->asoc = &stcb->asoc; 11591 chk->send_size = sizeof(struct sctp_cwr_chunk); 11592 chk->data = sctp_get_mbuf_for_msg(chk->send_size, 0, M_NOWAIT, 1, MT_HEADER); 11593 if (chk->data == NULL) { 11594 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 11595 return; 11596 } 11597 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11598 SCTP_BUF_LEN(chk->data) = chk->send_size; 11599 chk->sent = SCTP_DATAGRAM_UNSENT; 11600 chk->snd_count = 0; 11601 chk->whoTo = net; 11602 atomic_add_int(&chk->whoTo->ref_count, 1); 11603 cwr = mtod(chk->data, struct sctp_cwr_chunk *); 11604 cwr->ch.chunk_type = SCTP_ECN_CWR; 11605 cwr->ch.chunk_flags = override; 11606 cwr->ch.chunk_length = htons(sizeof(struct sctp_cwr_chunk)); 11607 cwr->tsn = htonl(high_tsn); 11608 TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue, chk, sctp_next); 11609 asoc->ctrl_queue_cnt++; 11610} 11611 11612static int 11613sctp_add_stream_reset_out(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk, 11614 uint32_t seq, uint32_t resp_seq, uint32_t last_sent) 11615{ 11616 uint16_t len, old_len, i; 11617 struct sctp_stream_reset_out_request *req_out; 11618 struct sctp_chunkhdr *ch; 11619 int at; 11620 int number_entries = 0; 11621 11622 ch = mtod(chk->data, struct sctp_chunkhdr *); 11623 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11624 /* get to new offset for the param. */ 11625 req_out = (struct sctp_stream_reset_out_request *)((caddr_t)ch + len); 11626 /* now how long will this param be? */ 11627 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11628 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) && 11629 (stcb->asoc.strmout[i].chunks_on_queues == 0) && 11630 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 11631 number_entries++; 11632 } 11633 } 11634 if (number_entries == 0) { 11635 return (0); 11636 } 11637 if (number_entries == stcb->asoc.streamoutcnt) { 11638 number_entries = 0; 11639 } 11640 if (number_entries > SCTP_MAX_STREAMS_AT_ONCE_RESET) { 11641 number_entries = SCTP_MAX_STREAMS_AT_ONCE_RESET; 11642 } 11643 len = (sizeof(struct sctp_stream_reset_out_request) + (sizeof(uint16_t) * number_entries)); 11644 req_out->ph.param_type = htons(SCTP_STR_RESET_OUT_REQUEST); 11645 req_out->ph.param_length = htons(len); 11646 req_out->request_seq = htonl(seq); 11647 req_out->response_seq = htonl(resp_seq); 11648 req_out->send_reset_at_tsn = htonl(last_sent); 11649 at = 0; 11650 if (number_entries) { 11651 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11652 if ((stcb->asoc.strmout[i].state == SCTP_STREAM_RESET_PENDING) && 11653 (stcb->asoc.strmout[i].chunks_on_queues == 0) && 11654 TAILQ_EMPTY(&stcb->asoc.strmout[i].outqueue)) { 11655 req_out->list_of_streams[at] = htons(i); 11656 at++; 11657 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT; 11658 if (at >= number_entries) { 11659 break; 11660 } 11661 } 11662 } 11663 } else { 11664 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 11665 stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_IN_FLIGHT; 11666 } 11667 } 11668 if (SCTP_SIZE32(len) > len) { 11669 /*- 11670 * Need to worry about the pad we may end up adding to the 11671 * end. This is easy since the struct is either aligned to 4 11672 * bytes or 2 bytes off. 11673 */ 11674 req_out->list_of_streams[number_entries] = 0; 11675 } 11676 /* now fix the chunk length */ 11677 ch->chunk_length = htons(len + old_len); 11678 chk->book_size = len + old_len; 11679 chk->book_size_scale = 0; 11680 chk->send_size = SCTP_SIZE32(chk->book_size); 11681 SCTP_BUF_LEN(chk->data) = chk->send_size; 11682 return (1); 11683} 11684 11685static void 11686sctp_add_stream_reset_in(struct sctp_tmit_chunk *chk, 11687 int number_entries, uint16_t * list, 11688 uint32_t seq) 11689{ 11690 uint16_t len, old_len, i; 11691 struct sctp_stream_reset_in_request *req_in; 11692 struct sctp_chunkhdr *ch; 11693 11694 ch = mtod(chk->data, struct sctp_chunkhdr *); 11695 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11696 11697 /* get to new offset for the param. */ 11698 req_in = (struct sctp_stream_reset_in_request *)((caddr_t)ch + len); 11699 /* now how long will this param be? */ 11700 len = (sizeof(struct sctp_stream_reset_in_request) + (sizeof(uint16_t) * number_entries)); 11701 req_in->ph.param_type = htons(SCTP_STR_RESET_IN_REQUEST); 11702 req_in->ph.param_length = htons(len); 11703 req_in->request_seq = htonl(seq); 11704 if (number_entries) { 11705 for (i = 0; i < number_entries; i++) { 11706 req_in->list_of_streams[i] = htons(list[i]); 11707 } 11708 } 11709 if (SCTP_SIZE32(len) > len) { 11710 /*- 11711 * Need to worry about the pad we may end up adding to the 11712 * end. This is easy since the struct is either aligned to 4 11713 * bytes or 2 bytes off. 11714 */ 11715 req_in->list_of_streams[number_entries] = 0; 11716 } 11717 /* now fix the chunk length */ 11718 ch->chunk_length = htons(len + old_len); 11719 chk->book_size = len + old_len; 11720 chk->book_size_scale = 0; 11721 chk->send_size = SCTP_SIZE32(chk->book_size); 11722 SCTP_BUF_LEN(chk->data) = chk->send_size; 11723 return; 11724} 11725 11726static void 11727sctp_add_stream_reset_tsn(struct sctp_tmit_chunk *chk, 11728 uint32_t seq) 11729{ 11730 uint16_t len, old_len; 11731 struct sctp_stream_reset_tsn_request *req_tsn; 11732 struct sctp_chunkhdr *ch; 11733 11734 ch = mtod(chk->data, struct sctp_chunkhdr *); 11735 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11736 11737 /* get to new offset for the param. */ 11738 req_tsn = (struct sctp_stream_reset_tsn_request *)((caddr_t)ch + len); 11739 /* now how long will this param be? */ 11740 len = sizeof(struct sctp_stream_reset_tsn_request); 11741 req_tsn->ph.param_type = htons(SCTP_STR_RESET_TSN_REQUEST); 11742 req_tsn->ph.param_length = htons(len); 11743 req_tsn->request_seq = htonl(seq); 11744 11745 /* now fix the chunk length */ 11746 ch->chunk_length = htons(len + old_len); 11747 chk->send_size = len + old_len; 11748 chk->book_size = SCTP_SIZE32(chk->send_size); 11749 chk->book_size_scale = 0; 11750 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11751 return; 11752} 11753 11754void 11755sctp_add_stream_reset_result(struct sctp_tmit_chunk *chk, 11756 uint32_t resp_seq, uint32_t result) 11757{ 11758 uint16_t len, old_len; 11759 struct sctp_stream_reset_response *resp; 11760 struct sctp_chunkhdr *ch; 11761 11762 ch = mtod(chk->data, struct sctp_chunkhdr *); 11763 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11764 11765 /* get to new offset for the param. */ 11766 resp = (struct sctp_stream_reset_response *)((caddr_t)ch + len); 11767 /* now how long will this param be? */ 11768 len = sizeof(struct sctp_stream_reset_response); 11769 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11770 resp->ph.param_length = htons(len); 11771 resp->response_seq = htonl(resp_seq); 11772 resp->result = ntohl(result); 11773 11774 /* now fix the chunk length */ 11775 ch->chunk_length = htons(len + old_len); 11776 chk->book_size = len + old_len; 11777 chk->book_size_scale = 0; 11778 chk->send_size = SCTP_SIZE32(chk->book_size); 11779 SCTP_BUF_LEN(chk->data) = chk->send_size; 11780 return; 11781} 11782 11783void 11784sctp_send_deferred_reset_response(struct sctp_tcb *stcb, 11785 struct sctp_stream_reset_list *ent, 11786 int response) 11787{ 11788 struct sctp_association *asoc; 11789 struct sctp_tmit_chunk *chk; 11790 struct sctp_chunkhdr *ch; 11791 11792 asoc = &stcb->asoc; 11793 11794 /* 11795 * Reset our last reset action to the new one IP -> response 11796 * (PERFORMED probably). This assures that if we fail to send, a 11797 * retran from the peer will get the new response. 11798 */ 11799 asoc->last_reset_action[0] = response; 11800 if (asoc->stream_reset_outstanding) { 11801 return; 11802 } 11803 sctp_alloc_a_chunk(stcb, chk); 11804 if (chk == NULL) { 11805 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11806 return; 11807 } 11808 chk->copy_by_ref = 0; 11809 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11810 chk->rec.chunk_id.can_take_data = 0; 11811 chk->flags = 0; 11812 chk->asoc = &stcb->asoc; 11813 chk->book_size = sizeof(struct sctp_chunkhdr); 11814 chk->send_size = SCTP_SIZE32(chk->book_size); 11815 chk->book_size_scale = 0; 11816 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11817 if (chk->data == NULL) { 11818 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 11819 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11820 return; 11821 } 11822 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11823 sctp_add_stream_reset_result(chk, ent->seq, response); 11824 /* setup chunk parameters */ 11825 chk->sent = SCTP_DATAGRAM_UNSENT; 11826 chk->snd_count = 0; 11827 if (stcb->asoc.alternate) { 11828 chk->whoTo = stcb->asoc.alternate; 11829 } else { 11830 chk->whoTo = stcb->asoc.primary_destination; 11831 } 11832 ch = mtod(chk->data, struct sctp_chunkhdr *); 11833 ch->chunk_type = SCTP_STREAM_RESET; 11834 ch->chunk_flags = 0; 11835 ch->chunk_length = htons(chk->book_size); 11836 atomic_add_int(&chk->whoTo->ref_count, 1); 11837 SCTP_BUF_LEN(chk->data) = chk->send_size; 11838 /* insert the chunk for sending */ 11839 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 11840 chk, 11841 sctp_next); 11842 asoc->ctrl_queue_cnt++; 11843} 11844 11845void 11846sctp_add_stream_reset_result_tsn(struct sctp_tmit_chunk *chk, 11847 uint32_t resp_seq, uint32_t result, 11848 uint32_t send_una, uint32_t recv_next) 11849{ 11850 uint16_t len, old_len; 11851 struct sctp_stream_reset_response_tsn *resp; 11852 struct sctp_chunkhdr *ch; 11853 11854 ch = mtod(chk->data, struct sctp_chunkhdr *); 11855 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11856 11857 /* get to new offset for the param. */ 11858 resp = (struct sctp_stream_reset_response_tsn *)((caddr_t)ch + len); 11859 /* now how long will this param be? */ 11860 len = sizeof(struct sctp_stream_reset_response_tsn); 11861 resp->ph.param_type = htons(SCTP_STR_RESET_RESPONSE); 11862 resp->ph.param_length = htons(len); 11863 resp->response_seq = htonl(resp_seq); 11864 resp->result = htonl(result); 11865 resp->senders_next_tsn = htonl(send_una); 11866 resp->receivers_next_tsn = htonl(recv_next); 11867 11868 /* now fix the chunk length */ 11869 ch->chunk_length = htons(len + old_len); 11870 chk->book_size = len + old_len; 11871 chk->send_size = SCTP_SIZE32(chk->book_size); 11872 chk->book_size_scale = 0; 11873 SCTP_BUF_LEN(chk->data) = chk->send_size; 11874 return; 11875} 11876 11877static void 11878sctp_add_an_out_stream(struct sctp_tmit_chunk *chk, 11879 uint32_t seq, 11880 uint16_t adding) 11881{ 11882 uint16_t len, old_len; 11883 struct sctp_chunkhdr *ch; 11884 struct sctp_stream_reset_add_strm *addstr; 11885 11886 ch = mtod(chk->data, struct sctp_chunkhdr *); 11887 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11888 11889 /* get to new offset for the param. */ 11890 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11891 /* now how long will this param be? */ 11892 len = sizeof(struct sctp_stream_reset_add_strm); 11893 11894 /* Fill it out. */ 11895 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_OUT_STREAMS); 11896 addstr->ph.param_length = htons(len); 11897 addstr->request_seq = htonl(seq); 11898 addstr->number_of_streams = htons(adding); 11899 addstr->reserved = 0; 11900 11901 /* now fix the chunk length */ 11902 ch->chunk_length = htons(len + old_len); 11903 chk->send_size = len + old_len; 11904 chk->book_size = SCTP_SIZE32(chk->send_size); 11905 chk->book_size_scale = 0; 11906 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11907 return; 11908} 11909 11910static void 11911sctp_add_an_in_stream(struct sctp_tmit_chunk *chk, 11912 uint32_t seq, 11913 uint16_t adding) 11914{ 11915 uint16_t len, old_len; 11916 struct sctp_chunkhdr *ch; 11917 struct sctp_stream_reset_add_strm *addstr; 11918 11919 ch = mtod(chk->data, struct sctp_chunkhdr *); 11920 old_len = len = SCTP_SIZE32(ntohs(ch->chunk_length)); 11921 11922 /* get to new offset for the param. */ 11923 addstr = (struct sctp_stream_reset_add_strm *)((caddr_t)ch + len); 11924 /* now how long will this param be? */ 11925 len = sizeof(struct sctp_stream_reset_add_strm); 11926 /* Fill it out. */ 11927 addstr->ph.param_type = htons(SCTP_STR_RESET_ADD_IN_STREAMS); 11928 addstr->ph.param_length = htons(len); 11929 addstr->request_seq = htonl(seq); 11930 addstr->number_of_streams = htons(adding); 11931 addstr->reserved = 0; 11932 11933 /* now fix the chunk length */ 11934 ch->chunk_length = htons(len + old_len); 11935 chk->send_size = len + old_len; 11936 chk->book_size = SCTP_SIZE32(chk->send_size); 11937 chk->book_size_scale = 0; 11938 SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size); 11939 return; 11940} 11941 11942int 11943sctp_send_stream_reset_out_if_possible(struct sctp_tcb *stcb, int so_locked) 11944{ 11945 struct sctp_association *asoc; 11946 struct sctp_tmit_chunk *chk; 11947 struct sctp_chunkhdr *ch; 11948 uint32_t seq; 11949 11950 asoc = &stcb->asoc; 11951 asoc->trigger_reset = 0; 11952 if (asoc->stream_reset_outstanding) { 11953 return (EALREADY); 11954 } 11955 sctp_alloc_a_chunk(stcb, chk); 11956 if (chk == NULL) { 11957 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11958 return (ENOMEM); 11959 } 11960 chk->copy_by_ref = 0; 11961 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 11962 chk->rec.chunk_id.can_take_data = 0; 11963 chk->flags = 0; 11964 chk->asoc = &stcb->asoc; 11965 chk->book_size = sizeof(struct sctp_chunkhdr); 11966 chk->send_size = SCTP_SIZE32(chk->book_size); 11967 chk->book_size_scale = 0; 11968 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 11969 if (chk->data == NULL) { 11970 sctp_free_a_chunk(stcb, chk, so_locked); 11971 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 11972 return (ENOMEM); 11973 } 11974 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 11975 11976 /* setup chunk parameters */ 11977 chk->sent = SCTP_DATAGRAM_UNSENT; 11978 chk->snd_count = 0; 11979 if (stcb->asoc.alternate) { 11980 chk->whoTo = stcb->asoc.alternate; 11981 } else { 11982 chk->whoTo = stcb->asoc.primary_destination; 11983 } 11984 ch = mtod(chk->data, struct sctp_chunkhdr *); 11985 ch->chunk_type = SCTP_STREAM_RESET; 11986 ch->chunk_flags = 0; 11987 ch->chunk_length = htons(chk->book_size); 11988 atomic_add_int(&chk->whoTo->ref_count, 1); 11989 SCTP_BUF_LEN(chk->data) = chk->send_size; 11990 seq = stcb->asoc.str_reset_seq_out; 11991 if (sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1))) { 11992 seq++; 11993 asoc->stream_reset_outstanding++; 11994 } else { 11995 m_freem(chk->data); 11996 chk->data = NULL; 11997 sctp_free_a_chunk(stcb, chk, so_locked); 11998 return (ENOENT); 11999 } 12000 asoc->str_reset = chk; 12001 /* insert the chunk for sending */ 12002 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 12003 chk, 12004 sctp_next); 12005 asoc->ctrl_queue_cnt++; 12006 12007 if (stcb->asoc.send_sack) { 12008 sctp_send_sack(stcb, so_locked); 12009 } 12010 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 12011 return (0); 12012} 12013 12014int 12015sctp_send_str_reset_req(struct sctp_tcb *stcb, 12016 uint16_t number_entries, uint16_t * list, 12017 uint8_t send_in_req, 12018 uint8_t send_tsn_req, 12019 uint8_t add_stream, 12020 uint16_t adding_o, 12021 uint16_t adding_i, uint8_t peer_asked) 12022{ 12023 struct sctp_association *asoc; 12024 struct sctp_tmit_chunk *chk; 12025 struct sctp_chunkhdr *ch; 12026 int can_send_out_req = 0; 12027 uint32_t seq; 12028 12029 asoc = &stcb->asoc; 12030 if (asoc->stream_reset_outstanding) { 12031 /*- 12032 * Already one pending, must get ACK back to clear the flag. 12033 */ 12034 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EBUSY); 12035 return (EBUSY); 12036 } 12037 if ((send_in_req == 0) && (send_tsn_req == 0) && 12038 (add_stream == 0)) { 12039 /* nothing to do */ 12040 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12041 return (EINVAL); 12042 } 12043 if (send_tsn_req && send_in_req) { 12044 /* error, can't do that */ 12045 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12046 return (EINVAL); 12047 } else if (send_in_req) { 12048 can_send_out_req = 1; 12049 } 12050 if (number_entries > (MCLBYTES - 12051 SCTP_MIN_OVERHEAD - 12052 sizeof(struct sctp_chunkhdr) - 12053 sizeof(struct sctp_stream_reset_out_request)) / 12054 sizeof(uint16_t)) { 12055 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12056 return (ENOMEM); 12057 } 12058 sctp_alloc_a_chunk(stcb, chk); 12059 if (chk == NULL) { 12060 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12061 return (ENOMEM); 12062 } 12063 chk->copy_by_ref = 0; 12064 chk->rec.chunk_id.id = SCTP_STREAM_RESET; 12065 chk->rec.chunk_id.can_take_data = 0; 12066 chk->flags = 0; 12067 chk->asoc = &stcb->asoc; 12068 chk->book_size = sizeof(struct sctp_chunkhdr); 12069 chk->send_size = SCTP_SIZE32(chk->book_size); 12070 chk->book_size_scale = 0; 12071 12072 chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA); 12073 if (chk->data == NULL) { 12074 sctp_free_a_chunk(stcb, chk, SCTP_SO_LOCKED); 12075 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12076 return (ENOMEM); 12077 } 12078 SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD); 12079 12080 /* setup chunk parameters */ 12081 chk->sent = SCTP_DATAGRAM_UNSENT; 12082 chk->snd_count = 0; 12083 if (stcb->asoc.alternate) { 12084 chk->whoTo = stcb->asoc.alternate; 12085 } else { 12086 chk->whoTo = stcb->asoc.primary_destination; 12087 } 12088 atomic_add_int(&chk->whoTo->ref_count, 1); 12089 ch = mtod(chk->data, struct sctp_chunkhdr *); 12090 ch->chunk_type = SCTP_STREAM_RESET; 12091 ch->chunk_flags = 0; 12092 ch->chunk_length = htons(chk->book_size); 12093 SCTP_BUF_LEN(chk->data) = chk->send_size; 12094 12095 seq = stcb->asoc.str_reset_seq_out; 12096 if (can_send_out_req) { 12097 int ret; 12098 12099 ret = sctp_add_stream_reset_out(stcb, chk, seq, (stcb->asoc.str_reset_seq_in - 1), (stcb->asoc.sending_seq - 1)); 12100 if (ret) { 12101 seq++; 12102 asoc->stream_reset_outstanding++; 12103 } 12104 } 12105 if ((add_stream & 1) && 12106 ((stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt) < adding_o)) { 12107 /* Need to allocate more */ 12108 struct sctp_stream_out *oldstream; 12109 struct sctp_stream_queue_pending *sp, *nsp; 12110 int i; 12111 12112#if defined(SCTP_DETAILED_STR_STATS) 12113 int j; 12114 12115#endif 12116 12117 oldstream = stcb->asoc.strmout; 12118 /* get some more */ 12119 SCTP_MALLOC(stcb->asoc.strmout, struct sctp_stream_out *, 12120 (stcb->asoc.streamoutcnt + adding_o) * sizeof(struct sctp_stream_out), 12121 SCTP_M_STRMO); 12122 if (stcb->asoc.strmout == NULL) { 12123 uint8_t x; 12124 12125 stcb->asoc.strmout = oldstream; 12126 /* Turn off the bit */ 12127 x = add_stream & 0xfe; 12128 add_stream = x; 12129 goto skip_stuff; 12130 } 12131 /* 12132 * Ok now we proceed with copying the old out stuff and 12133 * initializing the new stuff. 12134 */ 12135 SCTP_TCB_SEND_LOCK(stcb); 12136 stcb->asoc.ss_functions.sctp_ss_clear(stcb, &stcb->asoc, 0, 1); 12137 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 12138 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 12139 stcb->asoc.strmout[i].chunks_on_queues = oldstream[i].chunks_on_queues; 12140 stcb->asoc.strmout[i].next_sequence_send = oldstream[i].next_sequence_send; 12141 stcb->asoc.strmout[i].last_msg_incomplete = oldstream[i].last_msg_incomplete; 12142 stcb->asoc.strmout[i].stream_no = i; 12143 stcb->asoc.strmout[i].state = oldstream[i].state; 12144 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], &oldstream[i]); 12145 /* now anything on those queues? */ 12146 TAILQ_FOREACH_SAFE(sp, &oldstream[i].outqueue, next, nsp) { 12147 TAILQ_REMOVE(&oldstream[i].outqueue, sp, next); 12148 TAILQ_INSERT_TAIL(&stcb->asoc.strmout[i].outqueue, sp, next); 12149 } 12150 /* Now move assoc pointers too */ 12151 if (stcb->asoc.last_out_stream == &oldstream[i]) { 12152 stcb->asoc.last_out_stream = &stcb->asoc.strmout[i]; 12153 } 12154 if (stcb->asoc.locked_on_sending == &oldstream[i]) { 12155 stcb->asoc.locked_on_sending = &stcb->asoc.strmout[i]; 12156 } 12157 } 12158 /* now the new streams */ 12159 stcb->asoc.ss_functions.sctp_ss_init(stcb, &stcb->asoc, 1); 12160 for (i = stcb->asoc.streamoutcnt; i < (stcb->asoc.streamoutcnt + adding_o); i++) { 12161 TAILQ_INIT(&stcb->asoc.strmout[i].outqueue); 12162 stcb->asoc.strmout[i].chunks_on_queues = 0; 12163#if defined(SCTP_DETAILED_STR_STATS) 12164 for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) { 12165 stcb->asoc.strmout[i].abandoned_sent[j] = 0; 12166 stcb->asoc.strmout[i].abandoned_unsent[j] = 0; 12167 } 12168#else 12169 stcb->asoc.strmout[i].abandoned_sent[0] = 0; 12170 stcb->asoc.strmout[i].abandoned_unsent[0] = 0; 12171#endif 12172 stcb->asoc.strmout[i].next_sequence_send = 0x0; 12173 stcb->asoc.strmout[i].stream_no = i; 12174 stcb->asoc.strmout[i].last_msg_incomplete = 0; 12175 stcb->asoc.ss_functions.sctp_ss_init_stream(&stcb->asoc.strmout[i], NULL); 12176 stcb->asoc.strmout[i].state = SCTP_STREAM_CLOSED; 12177 } 12178 stcb->asoc.strm_realoutsize = stcb->asoc.streamoutcnt + adding_o; 12179 SCTP_FREE(oldstream, SCTP_M_STRMO); 12180 SCTP_TCB_SEND_UNLOCK(stcb); 12181 } 12182skip_stuff: 12183 if ((add_stream & 1) && (adding_o > 0)) { 12184 asoc->strm_pending_add_size = adding_o; 12185 asoc->peer_req_out = peer_asked; 12186 sctp_add_an_out_stream(chk, seq, adding_o); 12187 seq++; 12188 asoc->stream_reset_outstanding++; 12189 } 12190 if ((add_stream & 2) && (adding_i > 0)) { 12191 sctp_add_an_in_stream(chk, seq, adding_i); 12192 seq++; 12193 asoc->stream_reset_outstanding++; 12194 } 12195 if (send_in_req) { 12196 sctp_add_stream_reset_in(chk, number_entries, list, seq); 12197 seq++; 12198 asoc->stream_reset_outstanding++; 12199 } 12200 if (send_tsn_req) { 12201 sctp_add_stream_reset_tsn(chk, seq); 12202 asoc->stream_reset_outstanding++; 12203 } 12204 asoc->str_reset = chk; 12205 /* insert the chunk for sending */ 12206 TAILQ_INSERT_TAIL(&asoc->control_send_queue, 12207 chk, 12208 sctp_next); 12209 asoc->ctrl_queue_cnt++; 12210 if (stcb->asoc.send_sack) { 12211 sctp_send_sack(stcb, SCTP_SO_LOCKED); 12212 } 12213 sctp_timer_start(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb, chk->whoTo); 12214 return (0); 12215} 12216 12217void 12218sctp_send_abort(struct mbuf *m, int iphlen, struct sockaddr *src, struct sockaddr *dst, 12219 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 12220 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 12221 uint32_t vrf_id, uint16_t port) 12222{ 12223 /* Don't respond to an ABORT with an ABORT. */ 12224 if (sctp_is_there_an_abort_here(m, iphlen, &vtag)) { 12225 if (cause) 12226 sctp_m_freem(cause); 12227 return; 12228 } 12229 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_ABORT_ASSOCIATION, cause, 12230 mflowtype, mflowid, fibnum, 12231 vrf_id, port); 12232 return; 12233} 12234 12235void 12236sctp_send_operr_to(struct sockaddr *src, struct sockaddr *dst, 12237 struct sctphdr *sh, uint32_t vtag, struct mbuf *cause, 12238 uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum, 12239 uint32_t vrf_id, uint16_t port) 12240{ 12241 sctp_send_resp_msg(src, dst, sh, vtag, SCTP_OPERATION_ERROR, cause, 12242 mflowtype, mflowid, fibnum, 12243 vrf_id, port); 12244 return; 12245} 12246 12247static struct mbuf * 12248sctp_copy_resume(struct uio *uio, 12249 int max_send_len, 12250 int user_marks_eor, 12251 int *error, 12252 uint32_t * sndout, 12253 struct mbuf **new_tail) 12254{ 12255 struct mbuf *m; 12256 12257 m = m_uiotombuf(uio, M_WAITOK, max_send_len, 0, 12258 (M_PKTHDR | (user_marks_eor ? M_EOR : 0))); 12259 if (m == NULL) { 12260 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12261 *error = ENOBUFS; 12262 } else { 12263 *sndout = m_length(m, NULL); 12264 *new_tail = m_last(m); 12265 } 12266 return (m); 12267} 12268 12269static int 12270sctp_copy_one(struct sctp_stream_queue_pending *sp, 12271 struct uio *uio, 12272 int resv_upfront) 12273{ 12274 sp->data = m_uiotombuf(uio, M_WAITOK, sp->length, 12275 resv_upfront, 0); 12276 if (sp->data == NULL) { 12277 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOBUFS); 12278 return (ENOBUFS); 12279 } 12280 sp->tail_mbuf = m_last(sp->data); 12281 return (0); 12282} 12283 12284 12285 12286static struct sctp_stream_queue_pending * 12287sctp_copy_it_in(struct sctp_tcb *stcb, 12288 struct sctp_association *asoc, 12289 struct sctp_sndrcvinfo *srcv, 12290 struct uio *uio, 12291 struct sctp_nets *net, 12292 int max_send_len, 12293 int user_marks_eor, 12294 int *error) 12295{ 12296 /*- 12297 * This routine must be very careful in its work. Protocol 12298 * processing is up and running so care must be taken to spl...() 12299 * when you need to do something that may effect the stcb/asoc. The 12300 * sb is locked however. When data is copied the protocol processing 12301 * should be enabled since this is a slower operation... 12302 */ 12303 struct sctp_stream_queue_pending *sp = NULL; 12304 int resv_in_first; 12305 12306 *error = 0; 12307 /* Now can we send this? */ 12308 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12309 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12310 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12311 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12312 /* got data while shutting down */ 12313 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12314 *error = ECONNRESET; 12315 goto out_now; 12316 } 12317 sctp_alloc_a_strmoq(stcb, sp); 12318 if (sp == NULL) { 12319 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12320 *error = ENOMEM; 12321 goto out_now; 12322 } 12323 sp->act_flags = 0; 12324 sp->sender_all_done = 0; 12325 sp->sinfo_flags = srcv->sinfo_flags; 12326 sp->timetolive = srcv->sinfo_timetolive; 12327 sp->ppid = srcv->sinfo_ppid; 12328 sp->context = srcv->sinfo_context; 12329 (void)SCTP_GETTIME_TIMEVAL(&sp->ts); 12330 12331 sp->stream = srcv->sinfo_stream; 12332 sp->length = min(uio->uio_resid, max_send_len); 12333 if ((sp->length == (uint32_t) uio->uio_resid) && 12334 ((user_marks_eor == 0) || 12335 (srcv->sinfo_flags & SCTP_EOF) || 12336 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 12337 sp->msg_is_complete = 1; 12338 } else { 12339 sp->msg_is_complete = 0; 12340 } 12341 sp->sender_all_done = 0; 12342 sp->some_taken = 0; 12343 sp->put_last_out = 0; 12344 resv_in_first = sizeof(struct sctp_data_chunk); 12345 sp->data = sp->tail_mbuf = NULL; 12346 if (sp->length == 0) { 12347 *error = 0; 12348 goto skip_copy; 12349 } 12350 if (srcv->sinfo_keynumber_valid) { 12351 sp->auth_keyid = srcv->sinfo_keynumber; 12352 } else { 12353 sp->auth_keyid = stcb->asoc.authinfo.active_keyid; 12354 } 12355 if (sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.peer_auth_chunks)) { 12356 sctp_auth_key_acquire(stcb, sp->auth_keyid); 12357 sp->holds_key_ref = 1; 12358 } 12359 *error = sctp_copy_one(sp, uio, resv_in_first); 12360skip_copy: 12361 if (*error) { 12362 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 12363 sp = NULL; 12364 } else { 12365 if (sp->sinfo_flags & SCTP_ADDR_OVER) { 12366 sp->net = net; 12367 atomic_add_int(&sp->net->ref_count, 1); 12368 } else { 12369 sp->net = NULL; 12370 } 12371 sctp_set_prsctp_policy(sp); 12372 } 12373out_now: 12374 return (sp); 12375} 12376 12377 12378int 12379sctp_sosend(struct socket *so, 12380 struct sockaddr *addr, 12381 struct uio *uio, 12382 struct mbuf *top, 12383 struct mbuf *control, 12384 int flags, 12385 struct thread *p 12386) 12387{ 12388 int error, use_sndinfo = 0; 12389 struct sctp_sndrcvinfo sndrcvninfo; 12390 struct sockaddr *addr_to_use; 12391 12392#if defined(INET) && defined(INET6) 12393 struct sockaddr_in sin; 12394 12395#endif 12396 12397 if (control) { 12398 /* process cmsg snd/rcv info (maybe a assoc-id) */ 12399 if (sctp_find_cmsg(SCTP_SNDRCV, (void *)&sndrcvninfo, control, 12400 sizeof(sndrcvninfo))) { 12401 /* got one */ 12402 use_sndinfo = 1; 12403 } 12404 } 12405 addr_to_use = addr; 12406#if defined(INET) && defined(INET6) 12407 if ((addr) && (addr->sa_family == AF_INET6)) { 12408 struct sockaddr_in6 *sin6; 12409 12410 sin6 = (struct sockaddr_in6 *)addr; 12411 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 12412 in6_sin6_2_sin(&sin, sin6); 12413 addr_to_use = (struct sockaddr *)&sin; 12414 } 12415 } 12416#endif 12417 error = sctp_lower_sosend(so, addr_to_use, uio, top, 12418 control, 12419 flags, 12420 use_sndinfo ? &sndrcvninfo : NULL 12421 ,p 12422 ); 12423 return (error); 12424} 12425 12426 12427int 12428sctp_lower_sosend(struct socket *so, 12429 struct sockaddr *addr, 12430 struct uio *uio, 12431 struct mbuf *i_pak, 12432 struct mbuf *control, 12433 int flags, 12434 struct sctp_sndrcvinfo *srcv 12435 , 12436 struct thread *p 12437) 12438{ 12439 unsigned int sndlen = 0, max_len; 12440 int error, len; 12441 struct mbuf *top = NULL; 12442 int queue_only = 0, queue_only_for_init = 0; 12443 int free_cnt_applied = 0; 12444 int un_sent; 12445 int now_filled = 0; 12446 unsigned int inqueue_bytes = 0; 12447 struct sctp_block_entry be; 12448 struct sctp_inpcb *inp; 12449 struct sctp_tcb *stcb = NULL; 12450 struct timeval now; 12451 struct sctp_nets *net; 12452 struct sctp_association *asoc; 12453 struct sctp_inpcb *t_inp; 12454 int user_marks_eor; 12455 int create_lock_applied = 0; 12456 int nagle_applies = 0; 12457 int some_on_control = 0; 12458 int got_all_of_the_send = 0; 12459 int hold_tcblock = 0; 12460 int non_blocking = 0; 12461 uint32_t local_add_more, local_soresv = 0; 12462 uint16_t port; 12463 uint16_t sinfo_flags; 12464 sctp_assoc_t sinfo_assoc_id; 12465 12466 error = 0; 12467 net = NULL; 12468 stcb = NULL; 12469 asoc = NULL; 12470 12471 t_inp = inp = (struct sctp_inpcb *)so->so_pcb; 12472 if (inp == NULL) { 12473 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12474 error = EINVAL; 12475 if (i_pak) { 12476 SCTP_RELEASE_PKT(i_pak); 12477 } 12478 return (error); 12479 } 12480 if ((uio == NULL) && (i_pak == NULL)) { 12481 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12482 return (EINVAL); 12483 } 12484 user_marks_eor = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR); 12485 atomic_add_int(&inp->total_sends, 1); 12486 if (uio) { 12487 if (uio->uio_resid < 0) { 12488 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12489 return (EINVAL); 12490 } 12491 sndlen = uio->uio_resid; 12492 } else { 12493 top = SCTP_HEADER_TO_CHAIN(i_pak); 12494 sndlen = SCTP_HEADER_LEN(i_pak); 12495 } 12496 SCTPDBG(SCTP_DEBUG_OUTPUT1, "Send called addr:%p send length %d\n", 12497 (void *)addr, 12498 sndlen); 12499 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && 12500 (inp->sctp_socket->so_qlimit)) { 12501 /* The listener can NOT send */ 12502 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12503 error = ENOTCONN; 12504 goto out_unlocked; 12505 } 12506 /** 12507 * Pre-screen address, if one is given the sin-len 12508 * must be set correctly! 12509 */ 12510 if (addr) { 12511 union sctp_sockstore *raddr = (union sctp_sockstore *)addr; 12512 12513 switch (raddr->sa.sa_family) { 12514#ifdef INET 12515 case AF_INET: 12516 if (raddr->sin.sin_len != sizeof(struct sockaddr_in)) { 12517 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12518 error = EINVAL; 12519 goto out_unlocked; 12520 } 12521 port = raddr->sin.sin_port; 12522 break; 12523#endif 12524#ifdef INET6 12525 case AF_INET6: 12526 if (raddr->sin6.sin6_len != sizeof(struct sockaddr_in6)) { 12527 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12528 error = EINVAL; 12529 goto out_unlocked; 12530 } 12531 port = raddr->sin6.sin6_port; 12532 break; 12533#endif 12534 default: 12535 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EAFNOSUPPORT); 12536 error = EAFNOSUPPORT; 12537 goto out_unlocked; 12538 } 12539 } else 12540 port = 0; 12541 12542 if (srcv) { 12543 sinfo_flags = srcv->sinfo_flags; 12544 sinfo_assoc_id = srcv->sinfo_assoc_id; 12545 if (INVALID_SINFO_FLAG(sinfo_flags) || 12546 PR_SCTP_INVALID_POLICY(sinfo_flags)) { 12547 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12548 error = EINVAL; 12549 goto out_unlocked; 12550 } 12551 if (srcv->sinfo_flags) 12552 SCTP_STAT_INCR(sctps_sends_with_flags); 12553 } else { 12554 sinfo_flags = inp->def_send.sinfo_flags; 12555 sinfo_assoc_id = inp->def_send.sinfo_assoc_id; 12556 } 12557 if (sinfo_flags & SCTP_SENDALL) { 12558 /* its a sendall */ 12559 error = sctp_sendall(inp, uio, top, srcv); 12560 top = NULL; 12561 goto out_unlocked; 12562 } 12563 if ((sinfo_flags & SCTP_ADDR_OVER) && (addr == NULL)) { 12564 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12565 error = EINVAL; 12566 goto out_unlocked; 12567 } 12568 /* now we must find the assoc */ 12569 if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) || 12570 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 12571 SCTP_INP_RLOCK(inp); 12572 stcb = LIST_FIRST(&inp->sctp_asoc_list); 12573 if (stcb) { 12574 SCTP_TCB_LOCK(stcb); 12575 hold_tcblock = 1; 12576 } 12577 SCTP_INP_RUNLOCK(inp); 12578 } else if (sinfo_assoc_id) { 12579 stcb = sctp_findassociation_ep_asocid(inp, sinfo_assoc_id, 0); 12580 } else if (addr) { 12581 /*- 12582 * Since we did not use findep we must 12583 * increment it, and if we don't find a tcb 12584 * decrement it. 12585 */ 12586 SCTP_INP_WLOCK(inp); 12587 SCTP_INP_INCR_REF(inp); 12588 SCTP_INP_WUNLOCK(inp); 12589 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12590 if (stcb == NULL) { 12591 SCTP_INP_WLOCK(inp); 12592 SCTP_INP_DECR_REF(inp); 12593 SCTP_INP_WUNLOCK(inp); 12594 } else { 12595 hold_tcblock = 1; 12596 } 12597 } 12598 if ((stcb == NULL) && (addr)) { 12599 /* Possible implicit send? */ 12600 SCTP_ASOC_CREATE_LOCK(inp); 12601 create_lock_applied = 1; 12602 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) || 12603 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 12604 /* Should I really unlock ? */ 12605 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12606 error = EINVAL; 12607 goto out_unlocked; 12608 12609 } 12610 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) && 12611 (addr->sa_family == AF_INET6)) { 12612 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12613 error = EINVAL; 12614 goto out_unlocked; 12615 } 12616 SCTP_INP_WLOCK(inp); 12617 SCTP_INP_INCR_REF(inp); 12618 SCTP_INP_WUNLOCK(inp); 12619 /* With the lock applied look again */ 12620 stcb = sctp_findassociation_ep_addr(&t_inp, addr, &net, NULL, NULL); 12621 if ((stcb == NULL) && (control != NULL) && (port > 0)) { 12622 stcb = sctp_findassociation_cmsgs(&t_inp, port, control, &net, &error); 12623 } 12624 if (stcb == NULL) { 12625 SCTP_INP_WLOCK(inp); 12626 SCTP_INP_DECR_REF(inp); 12627 SCTP_INP_WUNLOCK(inp); 12628 } else { 12629 hold_tcblock = 1; 12630 } 12631 if (error) { 12632 goto out_unlocked; 12633 } 12634 if (t_inp != inp) { 12635 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOTCONN); 12636 error = ENOTCONN; 12637 goto out_unlocked; 12638 } 12639 } 12640 if (stcb == NULL) { 12641 if (addr == NULL) { 12642 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12643 error = ENOENT; 12644 goto out_unlocked; 12645 } else { 12646 /* We must go ahead and start the INIT process */ 12647 uint32_t vrf_id; 12648 12649 if ((sinfo_flags & SCTP_ABORT) || 12650 ((sinfo_flags & SCTP_EOF) && (sndlen == 0))) { 12651 /*- 12652 * User asks to abort a non-existant assoc, 12653 * or EOF a non-existant assoc with no data 12654 */ 12655 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOENT); 12656 error = ENOENT; 12657 goto out_unlocked; 12658 } 12659 /* get an asoc/stcb struct */ 12660 vrf_id = inp->def_vrf_id; 12661#ifdef INVARIANTS 12662 if (create_lock_applied == 0) { 12663 panic("Error, should hold create lock and I don't?"); 12664 } 12665#endif 12666 stcb = sctp_aloc_assoc(inp, addr, &error, 0, vrf_id, 12667 inp->sctp_ep.pre_open_stream_count, 12668 p 12669 ); 12670 if (stcb == NULL) { 12671 /* Error is setup for us in the call */ 12672 goto out_unlocked; 12673 } 12674 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 12675 stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; 12676 /* 12677 * Set the connected flag so we can queue 12678 * data 12679 */ 12680 soisconnecting(so); 12681 } 12682 hold_tcblock = 1; 12683 if (create_lock_applied) { 12684 SCTP_ASOC_CREATE_UNLOCK(inp); 12685 create_lock_applied = 0; 12686 } else { 12687 SCTP_PRINTF("Huh-3? create lock should have been on??\n"); 12688 } 12689 /* 12690 * Turn on queue only flag to prevent data from 12691 * being sent 12692 */ 12693 queue_only = 1; 12694 asoc = &stcb->asoc; 12695 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 12696 (void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered); 12697 12698 /* initialize authentication params for the assoc */ 12699 sctp_initialize_auth_params(inp, stcb); 12700 12701 if (control) { 12702 if (sctp_process_cmsgs_for_init(stcb, control, &error)) { 12703 sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, 12704 SCTP_FROM_SCTP_OUTPUT + SCTP_LOC_5); 12705 hold_tcblock = 0; 12706 stcb = NULL; 12707 goto out_unlocked; 12708 } 12709 } 12710 /* out with the INIT */ 12711 queue_only_for_init = 1; 12712 /*- 12713 * we may want to dig in after this call and adjust the MTU 12714 * value. It defaulted to 1500 (constant) but the ro 12715 * structure may now have an update and thus we may need to 12716 * change it BEFORE we append the message. 12717 */ 12718 } 12719 } else 12720 asoc = &stcb->asoc; 12721 if (srcv == NULL) 12722 srcv = (struct sctp_sndrcvinfo *)&asoc->def_send; 12723 if (srcv->sinfo_flags & SCTP_ADDR_OVER) { 12724 if (addr) 12725 net = sctp_findnet(stcb, addr); 12726 else 12727 net = NULL; 12728 if ((net == NULL) || 12729 ((port != 0) && (port != stcb->rport))) { 12730 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12731 error = EINVAL; 12732 goto out_unlocked; 12733 } 12734 } else { 12735 if (stcb->asoc.alternate) { 12736 net = stcb->asoc.alternate; 12737 } else { 12738 net = stcb->asoc.primary_destination; 12739 } 12740 } 12741 atomic_add_int(&stcb->total_sends, 1); 12742 /* Keep the stcb from being freed under our feet */ 12743 atomic_add_int(&asoc->refcnt, 1); 12744 free_cnt_applied = 1; 12745 12746 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NO_FRAGMENT)) { 12747 if (sndlen > asoc->smallest_mtu) { 12748 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12749 error = EMSGSIZE; 12750 goto out_unlocked; 12751 } 12752 } 12753 if (SCTP_SO_IS_NBIO(so) 12754 || (flags & MSG_NBIO) 12755 ) { 12756 non_blocking = 1; 12757 } 12758 /* would we block? */ 12759 if (non_blocking) { 12760 if (hold_tcblock == 0) { 12761 SCTP_TCB_LOCK(stcb); 12762 hold_tcblock = 1; 12763 } 12764 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12765 if ((SCTP_SB_LIMIT_SND(so) < (sndlen + inqueue_bytes + stcb->asoc.sb_send_resv)) || 12766 (stcb->asoc.chunks_on_out_queue >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12767 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EWOULDBLOCK); 12768 if (sndlen > SCTP_SB_LIMIT_SND(so)) 12769 error = EMSGSIZE; 12770 else 12771 error = EWOULDBLOCK; 12772 goto out_unlocked; 12773 } 12774 stcb->asoc.sb_send_resv += sndlen; 12775 SCTP_TCB_UNLOCK(stcb); 12776 hold_tcblock = 0; 12777 } else { 12778 atomic_add_int(&stcb->asoc.sb_send_resv, sndlen); 12779 } 12780 local_soresv = sndlen; 12781 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 12782 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12783 error = ECONNRESET; 12784 goto out_unlocked; 12785 } 12786 if (create_lock_applied) { 12787 SCTP_ASOC_CREATE_UNLOCK(inp); 12788 create_lock_applied = 0; 12789 } 12790 /* Is the stream no. valid? */ 12791 if (srcv->sinfo_stream >= asoc->streamoutcnt) { 12792 /* Invalid stream number */ 12793 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12794 error = EINVAL; 12795 goto out_unlocked; 12796 } 12797 if ((asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPEN) && 12798 (asoc->strmout[srcv->sinfo_stream].state != SCTP_STREAM_OPENING)) { 12799 /* 12800 * Can't queue any data while stream reset is underway. 12801 */ 12802 if (asoc->strmout[srcv->sinfo_stream].state > SCTP_STREAM_OPEN) { 12803 error = EAGAIN; 12804 } else { 12805 error = EINVAL; 12806 } 12807 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, error); 12808 goto out_unlocked; 12809 } 12810 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12811 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12812 queue_only = 1; 12813 } 12814 /* we are now done with all control */ 12815 if (control) { 12816 sctp_m_freem(control); 12817 control = NULL; 12818 } 12819 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) || 12820 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED) || 12821 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) || 12822 (asoc->state & SCTP_STATE_SHUTDOWN_PENDING)) { 12823 if (srcv->sinfo_flags & SCTP_ABORT) { 12824 ; 12825 } else { 12826 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 12827 error = ECONNRESET; 12828 goto out_unlocked; 12829 } 12830 } 12831 /* Ok, we will attempt a msgsnd :> */ 12832 if (p) { 12833 p->td_ru.ru_msgsnd++; 12834 } 12835 /* Are we aborting? */ 12836 if (srcv->sinfo_flags & SCTP_ABORT) { 12837 struct mbuf *mm; 12838 int tot_demand, tot_out = 0, max_out; 12839 12840 SCTP_STAT_INCR(sctps_sends_with_abort); 12841 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 12842 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) { 12843 /* It has to be up before we abort */ 12844 /* how big is the user initiated abort? */ 12845 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12846 error = EINVAL; 12847 goto out; 12848 } 12849 if (hold_tcblock) { 12850 SCTP_TCB_UNLOCK(stcb); 12851 hold_tcblock = 0; 12852 } 12853 if (top) { 12854 struct mbuf *cntm = NULL; 12855 12856 mm = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_WAITOK, 1, MT_DATA); 12857 if (sndlen != 0) { 12858 for (cntm = top; cntm; cntm = SCTP_BUF_NEXT(cntm)) { 12859 tot_out += SCTP_BUF_LEN(cntm); 12860 } 12861 } 12862 } else { 12863 /* Must fit in a MTU */ 12864 tot_out = sndlen; 12865 tot_demand = (tot_out + sizeof(struct sctp_paramhdr)); 12866 if (tot_demand > SCTP_DEFAULT_ADD_MORE) { 12867 /* To big */ 12868 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12869 error = EMSGSIZE; 12870 goto out; 12871 } 12872 mm = sctp_get_mbuf_for_msg(tot_demand, 0, M_WAITOK, 1, MT_DATA); 12873 } 12874 if (mm == NULL) { 12875 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, ENOMEM); 12876 error = ENOMEM; 12877 goto out; 12878 } 12879 max_out = asoc->smallest_mtu - sizeof(struct sctp_paramhdr); 12880 max_out -= sizeof(struct sctp_abort_msg); 12881 if (tot_out > max_out) { 12882 tot_out = max_out; 12883 } 12884 if (mm) { 12885 struct sctp_paramhdr *ph; 12886 12887 /* now move forward the data pointer */ 12888 ph = mtod(mm, struct sctp_paramhdr *); 12889 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 12890 ph->param_length = htons(sizeof(struct sctp_paramhdr) + tot_out); 12891 ph++; 12892 SCTP_BUF_LEN(mm) = tot_out + sizeof(struct sctp_paramhdr); 12893 if (top == NULL) { 12894 error = uiomove((caddr_t)ph, (int)tot_out, uio); 12895 if (error) { 12896 /*- 12897 * Here if we can't get his data we 12898 * still abort we just don't get to 12899 * send the users note :-0 12900 */ 12901 sctp_m_freem(mm); 12902 mm = NULL; 12903 } 12904 } else { 12905 if (sndlen != 0) { 12906 SCTP_BUF_NEXT(mm) = top; 12907 } 12908 } 12909 } 12910 if (hold_tcblock == 0) { 12911 SCTP_TCB_LOCK(stcb); 12912 } 12913 atomic_add_int(&stcb->asoc.refcnt, -1); 12914 free_cnt_applied = 0; 12915 /* release this lock, otherwise we hang on ourselves */ 12916 sctp_abort_an_association(stcb->sctp_ep, stcb, mm, SCTP_SO_LOCKED); 12917 /* now relock the stcb so everything is sane */ 12918 hold_tcblock = 0; 12919 stcb = NULL; 12920 /* 12921 * In this case top is already chained to mm avoid double 12922 * free, since we free it below if top != NULL and driver 12923 * would free it after sending the packet out 12924 */ 12925 if (sndlen != 0) { 12926 top = NULL; 12927 } 12928 goto out_unlocked; 12929 } 12930 /* Calculate the maximum we can send */ 12931 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12932 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 12933 if (non_blocking) { 12934 /* we already checked for non-blocking above. */ 12935 max_len = sndlen; 12936 } else { 12937 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 12938 } 12939 } else { 12940 max_len = 0; 12941 } 12942 if (hold_tcblock) { 12943 SCTP_TCB_UNLOCK(stcb); 12944 hold_tcblock = 0; 12945 } 12946 if (asoc->strmout == NULL) { 12947 /* huh? software error */ 12948 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EFAULT); 12949 error = EFAULT; 12950 goto out_unlocked; 12951 } 12952 /* Unless E_EOR mode is on, we must make a send FIT in one call. */ 12953 if ((user_marks_eor == 0) && 12954 (sndlen > SCTP_SB_LIMIT_SND(stcb->sctp_socket))) { 12955 /* It will NEVER fit */ 12956 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EMSGSIZE); 12957 error = EMSGSIZE; 12958 goto out_unlocked; 12959 } 12960 if ((uio == NULL) && user_marks_eor) { 12961 /*- 12962 * We do not support eeor mode for 12963 * sending with mbuf chains (like sendfile). 12964 */ 12965 SCTP_LTRACE_ERR_RET(NULL, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 12966 error = EINVAL; 12967 goto out_unlocked; 12968 } 12969 if (user_marks_eor) { 12970 local_add_more = min(SCTP_SB_LIMIT_SND(so), SCTP_BASE_SYSCTL(sctp_add_more_threshold)); 12971 } else { 12972 /*- 12973 * For non-eeor the whole message must fit in 12974 * the socket send buffer. 12975 */ 12976 local_add_more = sndlen; 12977 } 12978 len = 0; 12979 if (non_blocking) { 12980 goto skip_preblock; 12981 } 12982 if (((max_len <= local_add_more) && 12983 (SCTP_SB_LIMIT_SND(so) >= local_add_more)) || 12984 (max_len == 0) || 12985 ((stcb->asoc.chunks_on_out_queue + stcb->asoc.stream_queue_cnt) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12986 /* No room right now ! */ 12987 SOCKBUF_LOCK(&so->so_snd); 12988 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 12989 while ((SCTP_SB_LIMIT_SND(so) < (inqueue_bytes + local_add_more)) || 12990 ((stcb->asoc.stream_queue_cnt + stcb->asoc.chunks_on_out_queue) >= SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue))) { 12991 SCTPDBG(SCTP_DEBUG_OUTPUT1, "pre_block limit:%u <(inq:%d + %d) || (%d+%d > %d)\n", 12992 (unsigned int)SCTP_SB_LIMIT_SND(so), 12993 inqueue_bytes, 12994 local_add_more, 12995 stcb->asoc.stream_queue_cnt, 12996 stcb->asoc.chunks_on_out_queue, 12997 SCTP_BASE_SYSCTL(sctp_max_chunks_on_queue)); 12998 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 12999 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLKA, asoc, sndlen); 13000 } 13001 be.error = 0; 13002 stcb->block_entry = &be; 13003 error = sbwait(&so->so_snd); 13004 stcb->block_entry = NULL; 13005 if (error || so->so_error || be.error) { 13006 if (error == 0) { 13007 if (so->so_error) 13008 error = so->so_error; 13009 if (be.error) { 13010 error = be.error; 13011 } 13012 } 13013 SOCKBUF_UNLOCK(&so->so_snd); 13014 goto out_unlocked; 13015 } 13016 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13017 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13018 asoc, stcb->asoc.total_output_queue_size); 13019 } 13020 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13021 goto out_unlocked; 13022 } 13023 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13024 } 13025 if (SCTP_SB_LIMIT_SND(so) > inqueue_bytes) { 13026 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13027 } else { 13028 max_len = 0; 13029 } 13030 SOCKBUF_UNLOCK(&so->so_snd); 13031 } 13032skip_preblock: 13033 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13034 goto out_unlocked; 13035 } 13036 /* 13037 * sndlen covers for mbuf case uio_resid covers for the non-mbuf 13038 * case NOTE: uio will be null when top/mbuf is passed 13039 */ 13040 if (sndlen == 0) { 13041 if (srcv->sinfo_flags & SCTP_EOF) { 13042 got_all_of_the_send = 1; 13043 goto dataless_eof; 13044 } else { 13045 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13046 error = EINVAL; 13047 goto out; 13048 } 13049 } 13050 if (top == NULL) { 13051 struct sctp_stream_queue_pending *sp; 13052 struct sctp_stream_out *strm; 13053 uint32_t sndout; 13054 13055 SCTP_TCB_SEND_LOCK(stcb); 13056 if ((asoc->stream_locked) && 13057 (asoc->stream_locked_on != srcv->sinfo_stream)) { 13058 SCTP_TCB_SEND_UNLOCK(stcb); 13059 SCTP_LTRACE_ERR_RET(inp, stcb, net, SCTP_FROM_SCTP_OUTPUT, EINVAL); 13060 error = EINVAL; 13061 goto out; 13062 } 13063 SCTP_TCB_SEND_UNLOCK(stcb); 13064 13065 strm = &stcb->asoc.strmout[srcv->sinfo_stream]; 13066 if (strm->last_msg_incomplete == 0) { 13067 do_a_copy_in: 13068 sp = sctp_copy_it_in(stcb, asoc, srcv, uio, net, max_len, user_marks_eor, &error); 13069 if ((sp == NULL) || (error)) { 13070 goto out; 13071 } 13072 SCTP_TCB_SEND_LOCK(stcb); 13073 if (sp->msg_is_complete) { 13074 strm->last_msg_incomplete = 0; 13075 asoc->stream_locked = 0; 13076 } else { 13077 /* 13078 * Just got locked to this guy in case of an 13079 * interrupt. 13080 */ 13081 strm->last_msg_incomplete = 1; 13082 asoc->stream_locked = 1; 13083 asoc->stream_locked_on = srcv->sinfo_stream; 13084 sp->sender_all_done = 0; 13085 } 13086 sctp_snd_sb_alloc(stcb, sp->length); 13087 atomic_add_int(&asoc->stream_queue_cnt, 1); 13088 if (srcv->sinfo_flags & SCTP_UNORDERED) { 13089 SCTP_STAT_INCR(sctps_sends_with_unord); 13090 } 13091 TAILQ_INSERT_TAIL(&strm->outqueue, sp, next); 13092 stcb->asoc.ss_functions.sctp_ss_add_to_stream(stcb, asoc, strm, sp, 1); 13093 SCTP_TCB_SEND_UNLOCK(stcb); 13094 } else { 13095 SCTP_TCB_SEND_LOCK(stcb); 13096 sp = TAILQ_LAST(&strm->outqueue, sctp_streamhead); 13097 SCTP_TCB_SEND_UNLOCK(stcb); 13098 if (sp == NULL) { 13099 /* ???? Huh ??? last msg is gone */ 13100#ifdef INVARIANTS 13101 panic("Warning: Last msg marked incomplete, yet nothing left?"); 13102#else 13103 SCTP_PRINTF("Warning: Last msg marked incomplete, yet nothing left?\n"); 13104 strm->last_msg_incomplete = 0; 13105#endif 13106 goto do_a_copy_in; 13107 13108 } 13109 } 13110 while (uio->uio_resid > 0) { 13111 /* How much room do we have? */ 13112 struct mbuf *new_tail, *mm; 13113 13114 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 13115 max_len = SCTP_SB_LIMIT_SND(so) - stcb->asoc.total_output_queue_size; 13116 else 13117 max_len = 0; 13118 13119 if ((max_len > SCTP_BASE_SYSCTL(sctp_add_more_threshold)) || 13120 (max_len && (SCTP_SB_LIMIT_SND(so) < SCTP_BASE_SYSCTL(sctp_add_more_threshold))) || 13121 (uio->uio_resid && (uio->uio_resid <= (int)max_len))) { 13122 sndout = 0; 13123 new_tail = NULL; 13124 if (hold_tcblock) { 13125 SCTP_TCB_UNLOCK(stcb); 13126 hold_tcblock = 0; 13127 } 13128 mm = sctp_copy_resume(uio, max_len, user_marks_eor, &error, &sndout, &new_tail); 13129 if ((mm == NULL) || error) { 13130 if (mm) { 13131 sctp_m_freem(mm); 13132 } 13133 goto out; 13134 } 13135 /* Update the mbuf and count */ 13136 SCTP_TCB_SEND_LOCK(stcb); 13137 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13138 /* 13139 * we need to get out. Peer probably 13140 * aborted. 13141 */ 13142 sctp_m_freem(mm); 13143 if (stcb->asoc.state & SCTP_PCB_FLAGS_WAS_ABORTED) { 13144 SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTP_OUTPUT, ECONNRESET); 13145 error = ECONNRESET; 13146 } 13147 SCTP_TCB_SEND_UNLOCK(stcb); 13148 goto out; 13149 } 13150 if (sp->tail_mbuf) { 13151 /* tack it to the end */ 13152 SCTP_BUF_NEXT(sp->tail_mbuf) = mm; 13153 sp->tail_mbuf = new_tail; 13154 } else { 13155 /* A stolen mbuf */ 13156 sp->data = mm; 13157 sp->tail_mbuf = new_tail; 13158 } 13159 sctp_snd_sb_alloc(stcb, sndout); 13160 atomic_add_int(&sp->length, sndout); 13161 len += sndout; 13162 13163 /* Did we reach EOR? */ 13164 if ((uio->uio_resid == 0) && 13165 ((user_marks_eor == 0) || 13166 (srcv->sinfo_flags & SCTP_EOF) || 13167 (user_marks_eor && (srcv->sinfo_flags & SCTP_EOR)))) { 13168 sp->msg_is_complete = 1; 13169 } else { 13170 sp->msg_is_complete = 0; 13171 } 13172 SCTP_TCB_SEND_UNLOCK(stcb); 13173 } 13174 if (uio->uio_resid == 0) { 13175 /* got it all? */ 13176 continue; 13177 } 13178 /* PR-SCTP? */ 13179 if ((asoc->prsctp_supported) && (asoc->sent_queue_cnt_removeable > 0)) { 13180 /* 13181 * This is ugly but we must assure locking 13182 * order 13183 */ 13184 if (hold_tcblock == 0) { 13185 SCTP_TCB_LOCK(stcb); 13186 hold_tcblock = 1; 13187 } 13188 sctp_prune_prsctp(stcb, asoc, srcv, sndlen); 13189 inqueue_bytes = stcb->asoc.total_output_queue_size - (stcb->asoc.chunks_on_out_queue * sizeof(struct sctp_data_chunk)); 13190 if (SCTP_SB_LIMIT_SND(so) > stcb->asoc.total_output_queue_size) 13191 max_len = SCTP_SB_LIMIT_SND(so) - inqueue_bytes; 13192 else 13193 max_len = 0; 13194 if (max_len > 0) { 13195 continue; 13196 } 13197 SCTP_TCB_UNLOCK(stcb); 13198 hold_tcblock = 0; 13199 } 13200 /* wait for space now */ 13201 if (non_blocking) { 13202 /* Non-blocking io in place out */ 13203 goto skip_out_eof; 13204 } 13205 /* What about the INIT, send it maybe */ 13206 if (queue_only_for_init) { 13207 if (hold_tcblock == 0) { 13208 SCTP_TCB_LOCK(stcb); 13209 hold_tcblock = 1; 13210 } 13211 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13212 /* a collision took us forward? */ 13213 queue_only = 0; 13214 } else { 13215 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13216 SCTP_SET_STATE(asoc, SCTP_STATE_COOKIE_WAIT); 13217 queue_only = 1; 13218 } 13219 } 13220 if ((net->flight_size > net->cwnd) && 13221 (asoc->sctp_cmt_on_off == 0)) { 13222 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13223 queue_only = 1; 13224 } else if (asoc->ifp_had_enobuf) { 13225 SCTP_STAT_INCR(sctps_ifnomemqueued); 13226 if (net->flight_size > (2 * net->mtu)) { 13227 queue_only = 1; 13228 } 13229 asoc->ifp_had_enobuf = 0; 13230 } 13231 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13232 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13233 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13234 (stcb->asoc.total_flight > 0) && 13235 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13236 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13237 13238 /*- 13239 * Ok, Nagle is set on and we have data outstanding. 13240 * Don't send anything and let SACKs drive out the 13241 * data unless we have a "full" segment to send. 13242 */ 13243 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13244 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13245 } 13246 SCTP_STAT_INCR(sctps_naglequeued); 13247 nagle_applies = 1; 13248 } else { 13249 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13250 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13251 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13252 } 13253 SCTP_STAT_INCR(sctps_naglesent); 13254 nagle_applies = 0; 13255 } 13256 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13257 13258 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13259 nagle_applies, un_sent); 13260 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13261 stcb->asoc.total_flight, 13262 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13263 } 13264 if (queue_only_for_init) 13265 queue_only_for_init = 0; 13266 if ((queue_only == 0) && (nagle_applies == 0)) { 13267 /*- 13268 * need to start chunk output 13269 * before blocking.. note that if 13270 * a lock is already applied, then 13271 * the input via the net is happening 13272 * and I don't need to start output :-D 13273 */ 13274 if (hold_tcblock == 0) { 13275 if (SCTP_TCB_TRYLOCK(stcb)) { 13276 hold_tcblock = 1; 13277 sctp_chunk_output(inp, 13278 stcb, 13279 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13280 } 13281 } else { 13282 sctp_chunk_output(inp, 13283 stcb, 13284 SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13285 } 13286 if (hold_tcblock == 1) { 13287 SCTP_TCB_UNLOCK(stcb); 13288 hold_tcblock = 0; 13289 } 13290 } 13291 SOCKBUF_LOCK(&so->so_snd); 13292 /*- 13293 * This is a bit strange, but I think it will 13294 * work. The total_output_queue_size is locked and 13295 * protected by the TCB_LOCK, which we just released. 13296 * There is a race that can occur between releasing it 13297 * above, and me getting the socket lock, where sacks 13298 * come in but we have not put the SB_WAIT on the 13299 * so_snd buffer to get the wakeup. After the LOCK 13300 * is applied the sack_processing will also need to 13301 * LOCK the so->so_snd to do the actual sowwakeup(). So 13302 * once we have the socket buffer lock if we recheck the 13303 * size we KNOW we will get to sleep safely with the 13304 * wakeup flag in place. 13305 */ 13306 if (SCTP_SB_LIMIT_SND(so) <= (stcb->asoc.total_output_queue_size + 13307 min(SCTP_BASE_SYSCTL(sctp_add_more_threshold), SCTP_SB_LIMIT_SND(so)))) { 13308 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13309 sctp_log_block(SCTP_BLOCK_LOG_INTO_BLK, 13310 asoc, uio->uio_resid); 13311 } 13312 be.error = 0; 13313 stcb->block_entry = &be; 13314 error = sbwait(&so->so_snd); 13315 stcb->block_entry = NULL; 13316 13317 if (error || so->so_error || be.error) { 13318 if (error == 0) { 13319 if (so->so_error) 13320 error = so->so_error; 13321 if (be.error) { 13322 error = be.error; 13323 } 13324 } 13325 SOCKBUF_UNLOCK(&so->so_snd); 13326 goto out_unlocked; 13327 } 13328 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13329 sctp_log_block(SCTP_BLOCK_LOG_OUTOF_BLK, 13330 asoc, stcb->asoc.total_output_queue_size); 13331 } 13332 } 13333 SOCKBUF_UNLOCK(&so->so_snd); 13334 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 13335 goto out_unlocked; 13336 } 13337 } 13338 SCTP_TCB_SEND_LOCK(stcb); 13339 if (sp) { 13340 if (sp->msg_is_complete == 0) { 13341 strm->last_msg_incomplete = 1; 13342 asoc->stream_locked = 1; 13343 asoc->stream_locked_on = srcv->sinfo_stream; 13344 } else { 13345 sp->sender_all_done = 1; 13346 strm->last_msg_incomplete = 0; 13347 asoc->stream_locked = 0; 13348 } 13349 } else { 13350 SCTP_PRINTF("Huh no sp TSNH?\n"); 13351 strm->last_msg_incomplete = 0; 13352 asoc->stream_locked = 0; 13353 } 13354 SCTP_TCB_SEND_UNLOCK(stcb); 13355 if (uio->uio_resid == 0) { 13356 got_all_of_the_send = 1; 13357 } 13358 } else { 13359 /* We send in a 0, since we do NOT have any locks */ 13360 error = sctp_msg_append(stcb, net, top, srcv, 0); 13361 top = NULL; 13362 if (srcv->sinfo_flags & SCTP_EOF) { 13363 /* 13364 * This should only happen for Panda for the mbuf 13365 * send case, which does NOT yet support EEOR mode. 13366 * Thus, we can just set this flag to do the proper 13367 * EOF handling. 13368 */ 13369 got_all_of_the_send = 1; 13370 } 13371 } 13372 if (error) { 13373 goto out; 13374 } 13375dataless_eof: 13376 /* EOF thing ? */ 13377 if ((srcv->sinfo_flags & SCTP_EOF) && 13378 (got_all_of_the_send == 1)) { 13379 int cnt; 13380 13381 SCTP_STAT_INCR(sctps_sends_with_eof); 13382 error = 0; 13383 if (hold_tcblock == 0) { 13384 SCTP_TCB_LOCK(stcb); 13385 hold_tcblock = 1; 13386 } 13387 cnt = sctp_is_there_unsent_data(stcb, SCTP_SO_LOCKED); 13388 if (TAILQ_EMPTY(&asoc->send_queue) && 13389 TAILQ_EMPTY(&asoc->sent_queue) && 13390 (cnt == 0)) { 13391 if (asoc->locked_on_sending) { 13392 goto abort_anyway; 13393 } 13394 /* there is nothing queued to send, so I'm done... */ 13395 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13396 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13397 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13398 struct sctp_nets *netp; 13399 13400 /* only send SHUTDOWN the first time through */ 13401 if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) { 13402 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 13403 } 13404 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 13405 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 13406 sctp_stop_timers_for_shutdown(stcb); 13407 if (stcb->asoc.alternate) { 13408 netp = stcb->asoc.alternate; 13409 } else { 13410 netp = stcb->asoc.primary_destination; 13411 } 13412 sctp_send_shutdown(stcb, netp); 13413 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, 13414 netp); 13415 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13416 asoc->primary_destination); 13417 } 13418 } else { 13419 /*- 13420 * we still got (or just got) data to send, so set 13421 * SHUTDOWN_PENDING 13422 */ 13423 /*- 13424 * XXX sockets draft says that SCTP_EOF should be 13425 * sent with no data. currently, we will allow user 13426 * data to be sent first and move to 13427 * SHUTDOWN-PENDING 13428 */ 13429 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 13430 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) && 13431 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 13432 if (hold_tcblock == 0) { 13433 SCTP_TCB_LOCK(stcb); 13434 hold_tcblock = 1; 13435 } 13436 if (asoc->locked_on_sending) { 13437 /* Locked to send out the data */ 13438 struct sctp_stream_queue_pending *sp; 13439 13440 sp = TAILQ_LAST(&asoc->locked_on_sending->outqueue, sctp_streamhead); 13441 if (sp) { 13442 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 13443 asoc->state |= SCTP_STATE_PARTIAL_MSG_LEFT; 13444 } 13445 } 13446 asoc->state |= SCTP_STATE_SHUTDOWN_PENDING; 13447 if (TAILQ_EMPTY(&asoc->send_queue) && 13448 TAILQ_EMPTY(&asoc->sent_queue) && 13449 (asoc->state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 13450 struct mbuf *op_err; 13451 char msg[SCTP_DIAG_INFO_LEN]; 13452 13453 abort_anyway: 13454 if (free_cnt_applied) { 13455 atomic_add_int(&stcb->asoc.refcnt, -1); 13456 free_cnt_applied = 0; 13457 } 13458 snprintf(msg, sizeof(msg), 13459 "%s:%d at %s", __FILE__, __LINE__, __func__); 13460 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 13461 msg); 13462 sctp_abort_an_association(stcb->sctp_ep, stcb, 13463 op_err, SCTP_SO_LOCKED); 13464 /* 13465 * now relock the stcb so everything 13466 * is sane 13467 */ 13468 hold_tcblock = 0; 13469 stcb = NULL; 13470 goto out; 13471 } 13472 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, 13473 asoc->primary_destination); 13474 sctp_feature_off(inp, SCTP_PCB_FLAGS_NODELAY); 13475 } 13476 } 13477 } 13478skip_out_eof: 13479 if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) { 13480 some_on_control = 1; 13481 } 13482 if (queue_only_for_init) { 13483 if (hold_tcblock == 0) { 13484 SCTP_TCB_LOCK(stcb); 13485 hold_tcblock = 1; 13486 } 13487 if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) { 13488 /* a collision took us forward? */ 13489 queue_only = 0; 13490 } else { 13491 sctp_send_initiate(inp, stcb, SCTP_SO_LOCKED); 13492 SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_WAIT); 13493 queue_only = 1; 13494 } 13495 } 13496 if ((net->flight_size > net->cwnd) && 13497 (stcb->asoc.sctp_cmt_on_off == 0)) { 13498 SCTP_STAT_INCR(sctps_send_cwnd_avoid); 13499 queue_only = 1; 13500 } else if (asoc->ifp_had_enobuf) { 13501 SCTP_STAT_INCR(sctps_ifnomemqueued); 13502 if (net->flight_size > (2 * net->mtu)) { 13503 queue_only = 1; 13504 } 13505 asoc->ifp_had_enobuf = 0; 13506 } 13507 un_sent = ((stcb->asoc.total_output_queue_size - stcb->asoc.total_flight) + 13508 (stcb->asoc.stream_queue_cnt * sizeof(struct sctp_data_chunk))); 13509 if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) && 13510 (stcb->asoc.total_flight > 0) && 13511 (stcb->asoc.stream_queue_cnt < SCTP_MAX_DATA_BUNDLING) && 13512 (un_sent < (int)(stcb->asoc.smallest_mtu - SCTP_MIN_OVERHEAD))) { 13513 /*- 13514 * Ok, Nagle is set on and we have data outstanding. 13515 * Don't send anything and let SACKs drive out the 13516 * data unless wen have a "full" segment to send. 13517 */ 13518 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13519 sctp_log_nagle_event(stcb, SCTP_NAGLE_APPLIED); 13520 } 13521 SCTP_STAT_INCR(sctps_naglequeued); 13522 nagle_applies = 1; 13523 } else { 13524 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_NAGLE_LOGGING_ENABLE) { 13525 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_NODELAY)) 13526 sctp_log_nagle_event(stcb, SCTP_NAGLE_SKIPPED); 13527 } 13528 SCTP_STAT_INCR(sctps_naglesent); 13529 nagle_applies = 0; 13530 } 13531 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_BLK_LOGGING_ENABLE) { 13532 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, queue_only_for_init, queue_only, 13533 nagle_applies, un_sent); 13534 sctp_misc_ints(SCTP_CWNDLOG_PRESEND, stcb->asoc.total_output_queue_size, 13535 stcb->asoc.total_flight, 13536 stcb->asoc.chunks_on_out_queue, stcb->asoc.total_flight_count); 13537 } 13538 if ((queue_only == 0) && (nagle_applies == 0) && (stcb->asoc.peers_rwnd && un_sent)) { 13539 /* we can attempt to send too. */ 13540 if (hold_tcblock == 0) { 13541 /* 13542 * If there is activity recv'ing sacks no need to 13543 * send 13544 */ 13545 if (SCTP_TCB_TRYLOCK(stcb)) { 13546 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13547 hold_tcblock = 1; 13548 } 13549 } else { 13550 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13551 } 13552 } else if ((queue_only == 0) && 13553 (stcb->asoc.peers_rwnd == 0) && 13554 (stcb->asoc.total_flight == 0)) { 13555 /* We get to have a probe outstanding */ 13556 if (hold_tcblock == 0) { 13557 hold_tcblock = 1; 13558 SCTP_TCB_LOCK(stcb); 13559 } 13560 sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_USR_SEND, SCTP_SO_LOCKED); 13561 } else if (some_on_control) { 13562 int num_out, reason, frag_point; 13563 13564 /* Here we do control only */ 13565 if (hold_tcblock == 0) { 13566 hold_tcblock = 1; 13567 SCTP_TCB_LOCK(stcb); 13568 } 13569 frag_point = sctp_get_frag_point(stcb, &stcb->asoc); 13570 (void)sctp_med_chunk_output(inp, stcb, &stcb->asoc, &num_out, 13571 &reason, 1, 1, &now, &now_filled, frag_point, SCTP_SO_LOCKED); 13572 } 13573 SCTPDBG(SCTP_DEBUG_OUTPUT1, "USR Send complete qo:%d prw:%d unsent:%d tf:%d cooq:%d toqs:%d err:%d\n", 13574 queue_only, stcb->asoc.peers_rwnd, un_sent, 13575 stcb->asoc.total_flight, stcb->asoc.chunks_on_out_queue, 13576 stcb->asoc.total_output_queue_size, error); 13577 13578out: 13579out_unlocked: 13580 13581 if (local_soresv && stcb) { 13582 atomic_subtract_int(&stcb->asoc.sb_send_resv, sndlen); 13583 } 13584 if (create_lock_applied) { 13585 SCTP_ASOC_CREATE_UNLOCK(inp); 13586 } 13587 if ((stcb) && hold_tcblock) { 13588 SCTP_TCB_UNLOCK(stcb); 13589 } 13590 if (stcb && free_cnt_applied) { 13591 atomic_add_int(&stcb->asoc.refcnt, -1); 13592 } 13593#ifdef INVARIANTS 13594 if (stcb) { 13595 if (mtx_owned(&stcb->tcb_mtx)) { 13596 panic("Leaving with tcb mtx owned?"); 13597 } 13598 if (mtx_owned(&stcb->tcb_send_mtx)) { 13599 panic("Leaving with tcb send mtx owned?"); 13600 } 13601 } 13602#endif 13603 if (top) { 13604 sctp_m_freem(top); 13605 } 13606 if (control) { 13607 sctp_m_freem(control); 13608 } 13609 return (error); 13610} 13611 13612 13613/* 13614 * generate an AUTHentication chunk, if required 13615 */ 13616struct mbuf * 13617sctp_add_auth_chunk(struct mbuf *m, struct mbuf **m_end, 13618 struct sctp_auth_chunk **auth_ret, uint32_t * offset, 13619 struct sctp_tcb *stcb, uint8_t chunk) 13620{ 13621 struct mbuf *m_auth; 13622 struct sctp_auth_chunk *auth; 13623 int chunk_len; 13624 struct mbuf *cn; 13625 13626 if ((m_end == NULL) || (auth_ret == NULL) || (offset == NULL) || 13627 (stcb == NULL)) 13628 return (m); 13629 13630 if (stcb->asoc.auth_supported == 0) { 13631 return (m); 13632 } 13633 /* does the requested chunk require auth? */ 13634 if (!sctp_auth_is_required_chunk(chunk, stcb->asoc.peer_auth_chunks)) { 13635 return (m); 13636 } 13637 m_auth = sctp_get_mbuf_for_msg(sizeof(*auth), 0, M_NOWAIT, 1, MT_HEADER); 13638 if (m_auth == NULL) { 13639 /* no mbuf's */ 13640 return (m); 13641 } 13642 /* reserve some space if this will be the first mbuf */ 13643 if (m == NULL) 13644 SCTP_BUF_RESV_UF(m_auth, SCTP_MIN_OVERHEAD); 13645 /* fill in the AUTH chunk details */ 13646 auth = mtod(m_auth, struct sctp_auth_chunk *); 13647 bzero(auth, sizeof(*auth)); 13648 auth->ch.chunk_type = SCTP_AUTHENTICATION; 13649 auth->ch.chunk_flags = 0; 13650 chunk_len = sizeof(*auth) + 13651 sctp_get_hmac_digest_len(stcb->asoc.peer_hmac_id); 13652 auth->ch.chunk_length = htons(chunk_len); 13653 auth->hmac_id = htons(stcb->asoc.peer_hmac_id); 13654 /* key id and hmac digest will be computed and filled in upon send */ 13655 13656 /* save the offset where the auth was inserted into the chain */ 13657 *offset = 0; 13658 for (cn = m; cn; cn = SCTP_BUF_NEXT(cn)) { 13659 *offset += SCTP_BUF_LEN(cn); 13660 } 13661 13662 /* update length and return pointer to the auth chunk */ 13663 SCTP_BUF_LEN(m_auth) = chunk_len; 13664 m = sctp_copy_mbufchain(m_auth, m, m_end, 1, chunk_len, 0); 13665 if (auth_ret != NULL) 13666 *auth_ret = auth; 13667 13668 return (m); 13669} 13670 13671#ifdef INET6 13672int 13673sctp_v6src_match_nexthop(struct sockaddr_in6 *src6, sctp_route_t * ro) 13674{ 13675 struct nd_prefix *pfx = NULL; 13676 struct nd_pfxrouter *pfxrtr = NULL; 13677 struct sockaddr_in6 gw6; 13678 13679 if (ro == NULL || ro->ro_rt == NULL || src6->sin6_family != AF_INET6) 13680 return (0); 13681 13682 /* get prefix entry of address */ 13683 LIST_FOREACH(pfx, &MODULE_GLOBAL(nd_prefix), ndpr_entry) { 13684 if (pfx->ndpr_stateflags & NDPRF_DETACHED) 13685 continue; 13686 if (IN6_ARE_MASKED_ADDR_EQUAL(&pfx->ndpr_prefix.sin6_addr, 13687 &src6->sin6_addr, &pfx->ndpr_mask)) 13688 break; 13689 } 13690 /* no prefix entry in the prefix list */ 13691 if (pfx == NULL) { 13692 SCTPDBG(SCTP_DEBUG_OUTPUT2, "No prefix entry for "); 13693 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13694 return (0); 13695 } 13696 SCTPDBG(SCTP_DEBUG_OUTPUT2, "v6src_match_nexthop(), Prefix entry is "); 13697 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)src6); 13698 13699 /* search installed gateway from prefix entry */ 13700 LIST_FOREACH(pfxrtr, &pfx->ndpr_advrtrs, pfr_entry) { 13701 memset(&gw6, 0, sizeof(struct sockaddr_in6)); 13702 gw6.sin6_family = AF_INET6; 13703 gw6.sin6_len = sizeof(struct sockaddr_in6); 13704 memcpy(&gw6.sin6_addr, &pfxrtr->router->rtaddr, 13705 sizeof(struct in6_addr)); 13706 SCTPDBG(SCTP_DEBUG_OUTPUT2, "prefix router is "); 13707 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, (struct sockaddr *)&gw6); 13708 SCTPDBG(SCTP_DEBUG_OUTPUT2, "installed router is "); 13709 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13710 if (sctp_cmpaddr((struct sockaddr *)&gw6, 13711 ro->ro_rt->rt_gateway)) { 13712 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is installed\n"); 13713 return (1); 13714 } 13715 } 13716 SCTPDBG(SCTP_DEBUG_OUTPUT2, "pfxrouter is not installed\n"); 13717 return (0); 13718} 13719 13720#endif 13721 13722int 13723sctp_v4src_match_nexthop(struct sctp_ifa *sifa, sctp_route_t * ro) 13724{ 13725#ifdef INET 13726 struct sockaddr_in *sin, *mask; 13727 struct ifaddr *ifa; 13728 struct in_addr srcnetaddr, gwnetaddr; 13729 13730 if (ro == NULL || ro->ro_rt == NULL || 13731 sifa->address.sa.sa_family != AF_INET) { 13732 return (0); 13733 } 13734 ifa = (struct ifaddr *)sifa->ifa; 13735 mask = (struct sockaddr_in *)(ifa->ifa_netmask); 13736 sin = &sifa->address.sin; 13737 srcnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13738 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: src address is "); 13739 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, &sifa->address.sa); 13740 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", srcnetaddr.s_addr); 13741 13742 sin = (struct sockaddr_in *)ro->ro_rt->rt_gateway; 13743 gwnetaddr.s_addr = (sin->sin_addr.s_addr & mask->sin_addr.s_addr); 13744 SCTPDBG(SCTP_DEBUG_OUTPUT1, "match_nexthop4: nexthop is "); 13745 SCTPDBG_ADDR(SCTP_DEBUG_OUTPUT2, ro->ro_rt->rt_gateway); 13746 SCTPDBG(SCTP_DEBUG_OUTPUT1, "network address is %x\n", gwnetaddr.s_addr); 13747 if (srcnetaddr.s_addr == gwnetaddr.s_addr) { 13748 return (1); 13749 } 13750#endif 13751 return (0); 13752} 13753