ncpaddr.c revision 81634
1/*- 2 * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/usr.sbin/ppp/ncpaddr.c 81634 2001-08-14 16:05:52Z brian $ 27 */ 28 29#include <sys/types.h> 30#include <sys/socket.h> 31#include <net/if_types.h> 32#include <net/route.h> 33#include <netinet/in.h> 34#include <netinet/in_systm.h> 35#include <netinet/ip.h> 36#include <arpa/inet.h> 37#include <sys/un.h> 38 39#include <limits.h> 40#include <netdb.h> 41#include <stdio.h> 42#include <stdlib.h> 43#include <string.h> 44#include <termios.h> 45 46#include "log.h" 47#include "ncpaddr.h" 48#include "timer.h" 49#include "fsm.h" 50#include "defs.h" 51#include "slcompress.h" 52#include "iplist.h" 53#include "throughput.h" 54#include "mbuf.h" 55#include "ip.h" 56#include "ipcp.h" 57#include "filter.h" 58#include "descriptor.h" 59#include "route.h" 60#include "layer.h" 61#include "lqr.h" 62#include "hdlc.h" 63#include "lcp.h" 64#include "ccp.h" 65#include "link.h" 66#include "mp.h" 67#ifndef NORADIUS 68#include "radius.h" 69#endif 70#include "ipv6cp.h" 71#include "ncp.h" 72#include "bundle.h" 73 74 75#define ncprange_ip4addr u.ip4.ipaddr 76#define ncprange_ip4mask u.ip4.mask 77#define ncprange_ip4width u.ip4.width 78#define ncpaddr_ip4addr u.ip4addr 79#ifndef NOINET6 80#define ncprange_ip6addr u.ip6.ipaddr 81#define ncprange_ip6width u.ip6.width 82#define ncpaddr_ip6addr u.ip6addr 83#endif 84 85#define NCP_ASCIIBUFFERSIZE 52 86 87static struct in_addr 88bits2mask4(int bits) 89{ 90 struct in_addr result; 91 u_int32_t bit = 0x80000000; 92 93 result.s_addr = 0; 94 95 while (bits) { 96 result.s_addr |= bit; 97 bit >>= 1; 98 bits--; 99 } 100 101 result.s_addr = htonl(result.s_addr); 102 return result; 103} 104 105static int 106mask42bits(struct in_addr mask) 107{ 108 u_int32_t msk = ntohl(mask.s_addr); 109 u_int32_t tst; 110 int ret; 111 112 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 113 if (msk & tst) 114 break; 115 116 for (tst <<= 1; tst; tst <<= 1) 117 if (!(msk & tst)) 118 break; 119 120 return tst ? -1 : ret; 121} 122 123#ifndef NOINET6 124static struct in6_addr 125bits2mask6(int bits) 126{ 127 struct in6_addr result; 128 u_int32_t bit = 0x80; 129 u_char *c = result.s6_addr; 130 131 memset(&result, '\0', sizeof result); 132 133 while (bits) { 134 if (bit == 0) { 135 bit = 0x80; 136 c++; 137 } 138 *c |= bit; 139 bit >>= 1; 140 bits--; 141 } 142 143 return result; 144} 145 146static int 147mask62bits(const struct in6_addr *mask) 148{ 149 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 150 const u_char *c, *p, *end; 151 int masklen; 152 153 p = (const u_char *)mask; 154 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 155 masklen += 8; 156 157 if (p < end) { 158 for (c = masks; c < masks + sizeof masks; c++) 159 if (*c == *p) { 160 masklen += c - masks; 161 break; 162 } 163 } 164 165 return masklen; 166} 167 168static void 169adjust_linklocal(struct sockaddr_in6 *sin6) 170{ 171 /* XXX: ?????!?!?!!!!! This is horrible ! */ 172 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 173 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 174 sin6->sin6_scope_id = 175 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 176 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 177 } 178} 179#endif 180 181void 182ncpaddr_init(struct ncpaddr *addr) 183{ 184 addr->ncpaddr_family = AF_UNSPEC; 185} 186 187int 188ncpaddr_isdefault(const struct ncpaddr *addr) 189{ 190 switch (addr->ncpaddr_family) { 191 case AF_INET: 192 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 193 return 1; 194 break; 195 196#ifndef NOINET6 197 case AF_INET6: 198 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 199 return 1; 200 break; 201#endif 202 } 203 204 return 0; 205} 206 207int 208ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 209{ 210 if (addr->ncpaddr_family != cmp->ncpaddr_family) 211 return 0; 212 213 switch (addr->ncpaddr_family) { 214 case AF_INET: 215 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 216 217#ifndef NOINET6 218 case AF_INET6: 219 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 220 sizeof addr->ncpaddr_ip6addr); 221#endif 222 223 case AF_UNSPEC: 224 return 1; 225 } 226 227 return 0; 228} 229 230void 231ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 232{ 233 switch (from->ncpaddr_family) { 234 case AF_INET: 235 addr->ncpaddr_family = AF_INET; 236 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 237 break; 238#ifndef NOINET6 239 case AF_INET6: 240 addr->ncpaddr_family = AF_INET6; 241 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 242 break; 243#endif 244 default: 245 addr->ncpaddr_family = AF_UNSPEC; 246 } 247} 248 249void 250ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 251{ 252 addr->ncpaddr_family = AF_INET; 253 addr->ncpaddr_ip4addr.s_addr = ip; 254} 255 256int 257ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 258{ 259 if (addr->ncpaddr_family != AF_INET) 260 return 0; 261 *ip = addr->ncpaddr_ip4addr.s_addr; 262 return 1; 263} 264 265void 266ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 267{ 268 addr->ncpaddr_family = AF_INET; 269 addr->ncpaddr_ip4addr = ip; 270} 271 272int 273ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 274{ 275 if (addr->ncpaddr_family != AF_INET) 276 return 0; 277 *ip = addr->ncpaddr_ip4addr; 278 return 1; 279} 280 281#ifndef NOINET6 282void 283ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 284{ 285 addr->ncpaddr_family = AF_INET6; 286 addr->ncpaddr_ip6addr = *ip6; 287} 288 289int 290ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 291{ 292 if (addr->ncpaddr_family != AF_INET6) 293 return 0; 294 *ip6 = addr->ncpaddr_ip6addr; 295 return 1; 296} 297#endif 298 299void 300ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 301{ 302 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 303#ifndef NOINET6 304 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 305#endif 306 307 memset(host, '\0', sizeof(*host)); 308 309 switch (addr->ncpaddr_family) { 310 case AF_INET: 311 host4->sin_family = AF_INET; 312 host4->sin_len = sizeof(*host4); 313 host4->sin_addr = addr->ncpaddr_ip4addr; 314 break; 315 316#ifndef NOINET6 317 case AF_INET6: 318 host6->sin6_family = AF_INET6; 319 host6->sin6_len = sizeof(*host6); 320 host6->sin6_addr = addr->ncpaddr_ip6addr; 321 adjust_linklocal(host6); 322 break; 323#endif 324 325 default: 326 host->ss_family = AF_UNSPEC; 327 break; 328 } 329} 330 331void 332ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 333{ 334 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 335#ifndef NOINET6 336 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 337#endif 338 339 switch (host->sa_family) { 340 case AF_INET: 341 addr->ncpaddr_family = AF_INET; 342 addr->ncpaddr_ip4addr = host4->sin_addr; 343 break; 344 345#ifndef NOINET6 346 case AF_INET6: 347 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 348 addr->ncpaddr_family = AF_INET; 349 addr->ncpaddr_ip4addr.s_addr = 350 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 351 } else { 352 addr->ncpaddr_family = AF_INET6; 353 addr->ncpaddr_ip6addr = host6->sin6_addr; 354 } 355 break; 356#endif 357 358 default: 359 addr->ncpaddr_family = AF_UNSPEC; 360 } 361} 362 363static char * 364ncpaddr_ntowa(const struct ncpaddr *addr) 365{ 366 static char res[NCP_ASCIIBUFFERSIZE]; 367#ifndef NOINET6 368 struct sockaddr_in6 sin6; 369#endif 370 371 switch (addr->ncpaddr_family) { 372 case AF_INET: 373 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 374 return res; 375 376#ifndef NOINET6 377 case AF_INET6: 378 memset(&sin6, '\0', sizeof(sin6)); 379 sin6.sin6_len = sizeof(sin6); 380 sin6.sin6_family = AF_INET6; 381 sin6.sin6_addr = addr->ncpaddr_ip6addr; 382 adjust_linklocal(&sin6); 383 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 384 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 385 break; 386 387 return res; 388#endif 389 } 390 391 snprintf(res, sizeof res, "<AF_UNSPEC>"); 392 return res; 393} 394 395const char * 396ncpaddr_ntoa(const struct ncpaddr *addr) 397{ 398 return ncpaddr_ntowa(addr); 399} 400 401 402int 403ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 404{ 405 struct ncprange range; 406 407 if (!ncprange_aton(&range, ncp, data)) 408 return 0; 409 410 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 411 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 412 return 0; 413 } 414 415#ifndef NOINET6 416 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 417 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 418 return 0; 419 } 420#endif 421 422 switch (range.ncprange_family) { 423 case AF_INET: 424 addr->ncpaddr_family = range.ncprange_family; 425 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 426 return 1; 427 428#ifndef NOINET6 429 case AF_INET6: 430 addr->ncpaddr_family = range.ncprange_family; 431 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 432 return 1; 433#endif 434 } 435 436 return 0; 437} 438 439void 440ncprange_init(struct ncprange *range) 441{ 442 range->ncprange_family = AF_UNSPEC; 443} 444 445int 446ncprange_isset(const struct ncprange *range) 447{ 448 return range->ncprange_family != AF_UNSPEC; 449} 450 451int 452ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 453{ 454 if (range->ncprange_family != cmp->ncprange_family) 455 return 0; 456 457 switch (range->ncprange_family) { 458 case AF_INET: 459 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 460 return 0; 461 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 462 463#ifndef NOINET6 464 case AF_INET6: 465 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 466 return 0; 467 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 468 sizeof range->ncprange_ip6addr); 469#endif 470 471 case AF_UNSPEC: 472 return 1; 473 } 474 475 return 0; 476} 477 478int 479ncprange_isdefault(const struct ncprange *range) 480{ 481 switch (range->ncprange_family) { 482 case AF_INET: 483 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 484 return 1; 485 break; 486 487#ifndef NOINET6 488 case AF_INET6: 489 if (range->ncprange_ip6width == 0 && 490 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 491 return 1; 492 break; 493#endif 494 } 495 496 return 0; 497} 498 499void 500ncprange_setdefault(struct ncprange *range, int af) 501{ 502 memset(range, '\0', sizeof *range); 503 range->ncprange_family = af; 504} 505 506int 507ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 508{ 509#ifndef NOINET6 510 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 511 const u_char *addrp, *rangep; 512 int bits; 513#endif 514 515 if (range->ncprange_family != addr->ncpaddr_family) 516 return 0; 517 518 switch (range->ncprange_family) { 519 case AF_INET: 520 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 521 range->ncprange_ip4mask.s_addr); 522 523#ifndef NOINET6 524 case AF_INET6: 525 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 526 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 527 528 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 529 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 530 return 0; 531 532 return 1; 533#endif 534 } 535 536 return 0; 537} 538 539int 540ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 541{ 542 switch (range->ncprange_family) { 543 case AF_INET: 544 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 545 range->ncprange_ip4mask.s_addr); 546 } 547 548 return 0; 549} 550 551void 552ncprange_copy(struct ncprange *range, const struct ncprange *from) 553{ 554 switch (from->ncprange_family) { 555 case AF_INET: 556 range->ncprange_family = AF_INET; 557 range->ncprange_ip4addr = from->ncprange_ip4addr; 558 range->ncprange_ip4mask = from->ncprange_ip4mask; 559 range->ncprange_ip4width = from->ncprange_ip4width; 560 break; 561 562#ifndef NOINET6 563 case AF_INET6: 564 range->ncprange_family = AF_INET6; 565 range->ncprange_ip6addr = from->ncprange_ip6addr; 566 range->ncprange_ip6width = from->ncprange_ip6width; 567 break; 568#endif 569 570 default: 571 range->ncprange_family = AF_UNSPEC; 572 } 573} 574 575void 576ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 577{ 578 ncprange_sethost(range, addr); 579 ncprange_setwidth(range, width); 580} 581 582void 583ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 584{ 585 switch (from->ncpaddr_family) { 586 case AF_INET: 587 range->ncprange_family = AF_INET; 588 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 589 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 590 range->ncprange_ip4width = 32; 591 break; 592 593#ifndef NOINET6 594 case AF_INET6: 595 range->ncprange_family = AF_INET6; 596 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 597 range->ncprange_ip6width = 128; 598 break; 599#endif 600 601 default: 602 range->ncprange_family = AF_UNSPEC; 603 } 604} 605 606int 607ncprange_setwidth(struct ncprange *range, int width) 608{ 609 switch (range->ncprange_family) { 610 case AF_INET: 611 if (width < 0 || width > 32) 612 break; 613 range->ncprange_ip4width = width; 614 range->ncprange_ip4mask = bits2mask4(width); 615 break; 616 617#ifndef NOINET6 618 case AF_INET6: 619 if (width < 0 || width > 128) 620 break; 621 range->ncprange_ip6width = width; 622 break; 623#endif 624 625 case AF_UNSPEC: 626 return 1; 627 } 628 629 return 0; 630} 631 632void 633ncprange_setip4host(struct ncprange *range, struct in_addr from) 634{ 635 range->ncprange_family = AF_INET; 636 range->ncprange_ip4addr = from; 637 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 638 range->ncprange_ip4width = 32; 639} 640 641void 642ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 643{ 644 range->ncprange_family = AF_INET; 645 range->ncprange_ip4addr = from; 646 range->ncprange_ip4mask = msk; 647 range->ncprange_ip4width = mask42bits(msk); 648} 649 650 651int 652ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 653{ 654 if (range->ncprange_family != AF_INET) 655 return 0; 656 range->ncprange_ip4mask = mask; 657 range->ncprange_ip4width = mask42bits(mask); 658 return 1; 659} 660 661void 662ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 663 const struct sockaddr *mask) 664{ 665 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 666 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 667#ifndef NOINET6 668 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 669 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 670#endif 671 672 switch (host->sa_family) { 673 case AF_INET: 674 range->ncprange_family = AF_INET; 675 range->ncprange_ip4addr = host4->sin_addr; 676 if (mask4) { 677 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 678 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 679 } else { 680 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 681 range->ncprange_ip4width = 32; 682 } 683 break; 684 685#ifndef NOINET6 686 case AF_INET6: 687 range->ncprange_family = AF_INET6; 688 range->ncprange_ip6addr = host6->sin6_addr; 689 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 690 break; 691#endif 692 693 default: 694 range->ncprange_family = AF_UNSPEC; 695 } 696} 697 698void 699ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 700 struct sockaddr_storage *mask) 701{ 702 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 703 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 704#ifndef NOINET6 705 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 706 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 707#endif 708 709 memset(host, '\0', sizeof(*host)); 710 if (mask) 711 memset(mask, '\0', sizeof(*mask)); 712 713 switch (range->ncprange_family) { 714 case AF_INET: 715 host4->sin_family = AF_INET; 716 host4->sin_len = sizeof(*host4); 717 host4->sin_addr = range->ncprange_ip4addr; 718 if (mask4) { 719 mask4->sin_family = AF_INET; 720 mask4->sin_len = sizeof(*host4); 721 mask4->sin_addr = bits2mask4(range->ncprange_ip4width); 722 } 723 break; 724 725#ifndef NOINET6 726 case AF_INET6: 727 host6->sin6_family = AF_INET6; 728 host6->sin6_len = sizeof(*host6); 729 host6->sin6_addr = range->ncprange_ip6addr; 730 adjust_linklocal(host6); 731 if (mask6) { 732 mask6->sin6_family = AF_INET6; 733 mask6->sin6_len = sizeof(*host6); 734 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 735 } 736 break; 737#endif 738 739 default: 740 host->ss_family = AF_UNSPEC; 741 if (mask) 742 mask->ss_family = AF_UNSPEC; 743 break; 744 } 745} 746 747int 748ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 749{ 750 switch (range->ncprange_family) { 751 case AF_INET: 752 addr->ncpaddr_family = AF_INET; 753 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 754 return 1; 755#ifndef NOINET6 756 case AF_INET6: 757 addr->ncpaddr_family = AF_INET6; 758 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 759 return 1; 760#endif 761 } 762 763 return 0; 764} 765 766int 767ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 768{ 769 if (range->ncprange_family != AF_INET) 770 return 0; 771 772 *addr = range->ncprange_ip4addr; 773 return 1; 774} 775 776int 777ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 778{ 779 switch (range->ncprange_family) { 780 case AF_INET: 781 *mask = range->ncprange_ip4mask; 782 return 1; 783 } 784 785 return 0; 786} 787 788int 789ncprange_getwidth(const struct ncprange *range, int *width) 790{ 791 switch (range->ncprange_family) { 792 case AF_INET: 793 *width = range->ncprange_ip4width; 794 return 1; 795#ifndef NOINET6 796 case AF_INET6: 797 *width = range->ncprange_ip6width; 798 return 1; 799#endif 800 } 801 802 return 0; 803} 804 805const char * 806ncprange_ntoa(const struct ncprange *range) 807{ 808 char *res; 809 struct ncpaddr addr; 810 int len; 811 812 if (!ncprange_getaddr(range, &addr)) 813 return "<AF_UNSPEC>"; 814 815 res = ncpaddr_ntowa(&addr); 816 len = strlen(res); 817 if (len >= NCP_ASCIIBUFFERSIZE - 1) 818 return res; 819 820 switch (range->ncprange_family) { 821 case AF_INET: 822 if (range->ncprange_ip4width == -1) { 823 /* A non-contiguous mask */ 824 for (; len >= 3; res[len -= 2] = '\0') 825 if (strcmp(res + len - 2, ".0")) 826 break; 827 snprintf(res + len, sizeof res - len, "&0x%08lx", 828 ntohl(range->ncprange_ip4mask.s_addr)); 829 } else if (range->ncprange_ip4width < 32) 830 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 831 832 return res; 833 834#ifndef NOINET6 835 case AF_INET6: 836 if (range->ncprange_ip6width != 128) 837 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 838 839 return res; 840#endif 841 } 842 843 return "<AF_UNSPEC>"; 844} 845 846#ifndef NOINET6 847int 848ncprange_scopeid(const struct ncprange *range) 849{ 850 const struct in6_addr *sin6; 851 int scopeid = -1; 852 853 if (range->ncprange_family == AF_INET6) { 854 sin6 = &range->ncprange_ip6addr; 855 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 856 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 857 scopeid = -1; 858 } 859 860 return scopeid; 861} 862#endif 863 864int 865ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 866{ 867 int bits, len; 868 char *wp; 869 const char *cp; 870 char *s; 871 872 len = strcspn(data, "/"); 873 874 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 875 range->ncprange_family = AF_INET; 876 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 877 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 878 range->ncprange_ip4width = 32; 879 return 1; 880#ifndef NOINET6 881 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 882 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 883 return 1; 884#endif 885 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 886 range->ncprange_family = AF_INET; 887 range->ncprange_ip4addr = ncp->ipcp.my_ip; 888 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 889 range->ncprange_ip4width = 32; 890 return 1; 891#ifndef NOINET6 892 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 893 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 894 return 1; 895#endif 896 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 897 range->ncprange_family = AF_INET; 898 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 899 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 900 range->ncprange_ip4width = 32; 901 return 1; 902 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 903 range->ncprange_family = AF_INET; 904 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 905 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 906 range->ncprange_ip4width = 32; 907 return 1; 908 } 909 910 s = (char *)alloca(len + 1); 911 strncpy(s, data, len); 912 s[len] = '\0'; 913 bits = -1; 914 915 if (data[len] != '\0') { 916 bits = strtol(data + len + 1, &wp, 0); 917 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 918 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 919 return 0; 920 } 921 } 922 923 if ((cp = strchr(data, ':')) == NULL) { 924 range->ncprange_family = AF_INET; 925 926 range->ncprange_ip4addr = GetIpAddr(s); 927 928 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 929 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 930 return 0; 931 } 932 933 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 934 range->ncprange_ip4mask.s_addr = INADDR_ANY; 935 range->ncprange_ip4width = 0; 936 } else if (data[len] == '\0') { 937 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 938 range->ncprange_ip4width = 32; 939 } else { 940 if (bits > 32) { 941 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 942 return 0; 943 } 944 range->ncprange_ip4mask = bits2mask4(bits); 945 range->ncprange_ip4width = bits; 946 } 947 948 return 1; 949#ifndef NOINET6 950 } else if (strchr(cp + 1, ':') != NULL) { 951 range->ncprange_family = AF_INET6; 952 953 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 954 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 955 return 0; 956 } 957 958 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 959 range->ncprange_ip6width = 0; 960 else 961 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 962 return 1; 963#endif 964 } 965 966 return 0; 967} 968