ncpaddr.c revision 81739
1330569Sgordon/*- 2267843Sdelphij * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org> 3330569Sgordon * All rights reserved. 4330569Sgordon * 5330569Sgordon * Redistribution and use in source and binary forms, with or without 6330569Sgordon * modification, are permitted provided that the following conditions 7330569Sgordon * are met: 8330569Sgordon * 1. Redistributions of source code must retain the above copyright 9330569Sgordon * notice, this list of conditions and the following disclaimer. 10330569Sgordon * 2. Redistributions in binary form must reproduce the above copyright 11330569Sgordon * notice, this list of conditions and the following disclaimer in the 12330569Sgordon * documentation and/or other materials provided with the distribution. 13330569Sgordon * 14330569Sgordon * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15330569Sgordon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16330569Sgordon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17330569Sgordon * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18330569Sgordon * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19330569Sgordon * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20330569Sgordon * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21330569Sgordon * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22330569Sgordon * 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 81739 2001-08-16 02:01:05Z 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_isset(const struct ncpaddr *addr) 189{ 190 return addr->ncpaddr_family != AF_UNSPEC; 191} 192 193int 194ncpaddr_isdefault(const struct ncpaddr *addr) 195{ 196 switch (addr->ncpaddr_family) { 197 case AF_INET: 198 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 199 return 1; 200 break; 201 202#ifndef NOINET6 203 case AF_INET6: 204 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 205 return 1; 206 break; 207#endif 208 } 209 210 return 0; 211} 212 213int 214ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 215{ 216 if (addr->ncpaddr_family != cmp->ncpaddr_family) 217 return 0; 218 219 switch (addr->ncpaddr_family) { 220 case AF_INET: 221 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 222 223#ifndef NOINET6 224 case AF_INET6: 225 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 226 sizeof addr->ncpaddr_ip6addr); 227#endif 228 229 case AF_UNSPEC: 230 return 1; 231 } 232 233 return 0; 234} 235 236void 237ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 238{ 239 switch (from->ncpaddr_family) { 240 case AF_INET: 241 addr->ncpaddr_family = AF_INET; 242 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 243 break; 244#ifndef NOINET6 245 case AF_INET6: 246 addr->ncpaddr_family = AF_INET6; 247 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 248 break; 249#endif 250 default: 251 addr->ncpaddr_family = AF_UNSPEC; 252 } 253} 254 255void 256ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 257{ 258 addr->ncpaddr_family = AF_INET; 259 addr->ncpaddr_ip4addr.s_addr = ip; 260} 261 262int 263ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 264{ 265 if (addr->ncpaddr_family != AF_INET) 266 return 0; 267 *ip = addr->ncpaddr_ip4addr.s_addr; 268 return 1; 269} 270 271void 272ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 273{ 274 addr->ncpaddr_family = AF_INET; 275 addr->ncpaddr_ip4addr = ip; 276} 277 278int 279ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 280{ 281 if (addr->ncpaddr_family != AF_INET) 282 return 0; 283 *ip = addr->ncpaddr_ip4addr; 284 return 1; 285} 286 287#ifndef NOINET6 288void 289ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 290{ 291 addr->ncpaddr_family = AF_INET6; 292 addr->ncpaddr_ip6addr = *ip6; 293} 294 295int 296ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 297{ 298 if (addr->ncpaddr_family != AF_INET6) 299 return 0; 300 *ip6 = addr->ncpaddr_ip6addr; 301 return 1; 302} 303#endif 304 305void 306ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 307{ 308 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 309#ifndef NOINET6 310 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 311#endif 312 313 memset(host, '\0', sizeof(*host)); 314 315 switch (addr->ncpaddr_family) { 316 case AF_INET: 317 host4->sin_family = AF_INET; 318 host4->sin_len = sizeof(*host4); 319 host4->sin_addr = addr->ncpaddr_ip4addr; 320 break; 321 322#ifndef NOINET6 323 case AF_INET6: 324 host6->sin6_family = AF_INET6; 325 host6->sin6_len = sizeof(*host6); 326 host6->sin6_addr = addr->ncpaddr_ip6addr; 327 adjust_linklocal(host6); 328 break; 329#endif 330 331 default: 332 host->ss_family = AF_UNSPEC; 333 break; 334 } 335} 336 337void 338ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 339{ 340 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 341#ifndef NOINET6 342 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 343#endif 344 345 switch (host->sa_family) { 346 case AF_INET: 347 addr->ncpaddr_family = AF_INET; 348 addr->ncpaddr_ip4addr = host4->sin_addr; 349 break; 350 351#ifndef NOINET6 352 case AF_INET6: 353 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 354 addr->ncpaddr_family = AF_INET; 355 addr->ncpaddr_ip4addr.s_addr = 356 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 357 } else { 358 addr->ncpaddr_family = AF_INET6; 359 addr->ncpaddr_ip6addr = host6->sin6_addr; 360 } 361 break; 362#endif 363 364 default: 365 addr->ncpaddr_family = AF_UNSPEC; 366 } 367} 368 369static char * 370ncpaddr_ntowa(const struct ncpaddr *addr) 371{ 372 static char res[NCP_ASCIIBUFFERSIZE]; 373#ifndef NOINET6 374 struct sockaddr_in6 sin6; 375#endif 376 377 switch (addr->ncpaddr_family) { 378 case AF_INET: 379 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 380 return res; 381 382#ifndef NOINET6 383 case AF_INET6: 384 memset(&sin6, '\0', sizeof(sin6)); 385 sin6.sin6_len = sizeof(sin6); 386 sin6.sin6_family = AF_INET6; 387 sin6.sin6_addr = addr->ncpaddr_ip6addr; 388 adjust_linklocal(&sin6); 389 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 390 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 391 break; 392 393 return res; 394#endif 395 } 396 397 snprintf(res, sizeof res, "<AF_UNSPEC>"); 398 return res; 399} 400 401const char * 402ncpaddr_ntoa(const struct ncpaddr *addr) 403{ 404 return ncpaddr_ntowa(addr); 405} 406 407 408int 409ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 410{ 411 struct ncprange range; 412 413 if (!ncprange_aton(&range, ncp, data)) 414 return 0; 415 416 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 417 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 418 return 0; 419 } 420 421#ifndef NOINET6 422 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 423 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 424 return 0; 425 } 426#endif 427 428 switch (range.ncprange_family) { 429 case AF_INET: 430 addr->ncpaddr_family = range.ncprange_family; 431 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 432 return 1; 433 434#ifndef NOINET6 435 case AF_INET6: 436 addr->ncpaddr_family = range.ncprange_family; 437 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 438 return 1; 439#endif 440 } 441 442 return 0; 443} 444 445void 446ncprange_init(struct ncprange *range) 447{ 448 range->ncprange_family = AF_UNSPEC; 449} 450 451int 452ncprange_isset(const struct ncprange *range) 453{ 454 return range->ncprange_family != AF_UNSPEC; 455} 456 457int 458ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 459{ 460 if (range->ncprange_family != cmp->ncprange_family) 461 return 0; 462 463 switch (range->ncprange_family) { 464 case AF_INET: 465 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 466 return 0; 467 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 468 469#ifndef NOINET6 470 case AF_INET6: 471 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 472 return 0; 473 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 474 sizeof range->ncprange_ip6addr); 475#endif 476 477 case AF_UNSPEC: 478 return 1; 479 } 480 481 return 0; 482} 483 484int 485ncprange_isdefault(const struct ncprange *range) 486{ 487 switch (range->ncprange_family) { 488 case AF_INET: 489 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 490 return 1; 491 break; 492 493#ifndef NOINET6 494 case AF_INET6: 495 if (range->ncprange_ip6width == 0 && 496 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 497 return 1; 498 break; 499#endif 500 } 501 502 return 0; 503} 504 505void 506ncprange_setdefault(struct ncprange *range, int af) 507{ 508 memset(range, '\0', sizeof *range); 509 range->ncprange_family = af; 510} 511 512int 513ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 514{ 515#ifndef NOINET6 516 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 517 const u_char *addrp, *rangep; 518 int bits; 519#endif 520 521 if (range->ncprange_family != addr->ncpaddr_family) 522 return 0; 523 524 switch (range->ncprange_family) { 525 case AF_INET: 526 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 527 range->ncprange_ip4mask.s_addr); 528 529#ifndef NOINET6 530 case AF_INET6: 531 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 532 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 533 534 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 535 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 536 return 0; 537 538 return 1; 539#endif 540 } 541 542 return 0; 543} 544 545int 546ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 547{ 548 switch (range->ncprange_family) { 549 case AF_INET: 550 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 551 range->ncprange_ip4mask.s_addr); 552 } 553 554 return 0; 555} 556 557void 558ncprange_copy(struct ncprange *range, const struct ncprange *from) 559{ 560 switch (from->ncprange_family) { 561 case AF_INET: 562 range->ncprange_family = AF_INET; 563 range->ncprange_ip4addr = from->ncprange_ip4addr; 564 range->ncprange_ip4mask = from->ncprange_ip4mask; 565 range->ncprange_ip4width = from->ncprange_ip4width; 566 break; 567 568#ifndef NOINET6 569 case AF_INET6: 570 range->ncprange_family = AF_INET6; 571 range->ncprange_ip6addr = from->ncprange_ip6addr; 572 range->ncprange_ip6width = from->ncprange_ip6width; 573 break; 574#endif 575 576 default: 577 range->ncprange_family = AF_UNSPEC; 578 } 579} 580 581void 582ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 583{ 584 ncprange_sethost(range, addr); 585 ncprange_setwidth(range, width); 586} 587 588void 589ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 590{ 591 switch (from->ncpaddr_family) { 592 case AF_INET: 593 range->ncprange_family = AF_INET; 594 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 595 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 596 range->ncprange_ip4width = 32; 597 break; 598 599#ifndef NOINET6 600 case AF_INET6: 601 range->ncprange_family = AF_INET6; 602 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 603 range->ncprange_ip6width = 128; 604 break; 605#endif 606 607 default: 608 range->ncprange_family = AF_UNSPEC; 609 } 610} 611 612int 613ncprange_setwidth(struct ncprange *range, int width) 614{ 615 switch (range->ncprange_family) { 616 case AF_INET: 617 if (width < 0 || width > 32) 618 break; 619 range->ncprange_ip4width = width; 620 range->ncprange_ip4mask = bits2mask4(width); 621 break; 622 623#ifndef NOINET6 624 case AF_INET6: 625 if (width < 0 || width > 128) 626 break; 627 range->ncprange_ip6width = width; 628 break; 629#endif 630 631 case AF_UNSPEC: 632 return 1; 633 } 634 635 return 0; 636} 637 638void 639ncprange_setip4host(struct ncprange *range, struct in_addr from) 640{ 641 range->ncprange_family = AF_INET; 642 range->ncprange_ip4addr = from; 643 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 644 range->ncprange_ip4width = 32; 645} 646 647void 648ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 649{ 650 range->ncprange_family = AF_INET; 651 range->ncprange_ip4addr = from; 652 range->ncprange_ip4mask = msk; 653 range->ncprange_ip4width = mask42bits(msk); 654} 655 656 657int 658ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 659{ 660 if (range->ncprange_family != AF_INET) 661 return 0; 662 range->ncprange_ip4mask = mask; 663 range->ncprange_ip4width = mask42bits(mask); 664 return 1; 665} 666 667void 668ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 669 const struct sockaddr *mask) 670{ 671 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 672 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 673#ifndef NOINET6 674 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 675 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 676#endif 677 678 switch (host->sa_family) { 679 case AF_INET: 680 range->ncprange_family = AF_INET; 681 range->ncprange_ip4addr = host4->sin_addr; 682 if (mask4) { 683 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 684 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 685 } else { 686 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 687 range->ncprange_ip4width = 32; 688 } 689 break; 690 691#ifndef NOINET6 692 case AF_INET6: 693 range->ncprange_family = AF_INET6; 694 range->ncprange_ip6addr = host6->sin6_addr; 695 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 696 break; 697#endif 698 699 default: 700 range->ncprange_family = AF_UNSPEC; 701 } 702} 703 704void 705ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 706 struct sockaddr_storage *mask) 707{ 708 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 709 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 710#ifndef NOINET6 711 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 712 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 713#endif 714 715 memset(host, '\0', sizeof(*host)); 716 if (mask) 717 memset(mask, '\0', sizeof(*mask)); 718 719 switch (range->ncprange_family) { 720 case AF_INET: 721 host4->sin_family = AF_INET; 722 host4->sin_len = sizeof(*host4); 723 host4->sin_addr = range->ncprange_ip4addr; 724 if (mask4) { 725 mask4->sin_family = AF_INET; 726 mask4->sin_len = sizeof(*host4); 727 mask4->sin_addr = range->ncprange_ip4mask; 728 } 729 break; 730 731#ifndef NOINET6 732 case AF_INET6: 733 host6->sin6_family = AF_INET6; 734 host6->sin6_len = sizeof(*host6); 735 host6->sin6_addr = range->ncprange_ip6addr; 736 adjust_linklocal(host6); 737 if (mask6) { 738 mask6->sin6_family = AF_INET6; 739 mask6->sin6_len = sizeof(*host6); 740 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 741 } 742 break; 743#endif 744 745 default: 746 host->ss_family = AF_UNSPEC; 747 if (mask) 748 mask->ss_family = AF_UNSPEC; 749 break; 750 } 751} 752 753int 754ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 755{ 756 switch (range->ncprange_family) { 757 case AF_INET: 758 addr->ncpaddr_family = AF_INET; 759 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 760 return 1; 761#ifndef NOINET6 762 case AF_INET6: 763 addr->ncpaddr_family = AF_INET6; 764 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 765 return 1; 766#endif 767 } 768 769 return 0; 770} 771 772int 773ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 774{ 775 if (range->ncprange_family != AF_INET) 776 return 0; 777 778 *addr = range->ncprange_ip4addr; 779 return 1; 780} 781 782int 783ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 784{ 785 switch (range->ncprange_family) { 786 case AF_INET: 787 *mask = range->ncprange_ip4mask; 788 return 1; 789 } 790 791 return 0; 792} 793 794int 795ncprange_getwidth(const struct ncprange *range, int *width) 796{ 797 switch (range->ncprange_family) { 798 case AF_INET: 799 *width = range->ncprange_ip4width; 800 return 1; 801#ifndef NOINET6 802 case AF_INET6: 803 *width = range->ncprange_ip6width; 804 return 1; 805#endif 806 } 807 808 return 0; 809} 810 811const char * 812ncprange_ntoa(const struct ncprange *range) 813{ 814 char *res; 815 struct ncpaddr addr; 816 int len; 817 818 if (!ncprange_getaddr(range, &addr)) 819 return "<AF_UNSPEC>"; 820 821 res = ncpaddr_ntowa(&addr); 822 len = strlen(res); 823 if (len >= NCP_ASCIIBUFFERSIZE - 1) 824 return res; 825 826 switch (range->ncprange_family) { 827 case AF_INET: 828 if (range->ncprange_ip4width == -1) { 829 /* A non-contiguous mask */ 830 for (; len >= 3; res[len -= 2] = '\0') 831 if (strcmp(res + len - 2, ".0")) 832 break; 833 snprintf(res + len, sizeof res - len, "&0x%08lx", 834 ntohl(range->ncprange_ip4mask.s_addr)); 835 } else if (range->ncprange_ip4width < 32) 836 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 837 838 return res; 839 840#ifndef NOINET6 841 case AF_INET6: 842 if (range->ncprange_ip6width != 128) 843 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 844 845 return res; 846#endif 847 } 848 849 return "<AF_UNSPEC>"; 850} 851 852#ifndef NOINET6 853int 854ncprange_scopeid(const struct ncprange *range) 855{ 856 const struct in6_addr *sin6; 857 int scopeid = -1; 858 859 if (range->ncprange_family == AF_INET6) { 860 sin6 = &range->ncprange_ip6addr; 861 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 862 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 863 scopeid = -1; 864 } 865 866 return scopeid; 867} 868#endif 869 870int 871ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 872{ 873 int bits, len; 874 char *wp; 875 const char *cp; 876 char *s; 877 878 len = strcspn(data, "/"); 879 880 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 881 range->ncprange_family = AF_INET; 882 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 883 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 884 range->ncprange_ip4width = 32; 885 return 1; 886#ifndef NOINET6 887 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 888 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 889 return 1; 890#endif 891 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 892 range->ncprange_family = AF_INET; 893 range->ncprange_ip4addr = ncp->ipcp.my_ip; 894 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 895 range->ncprange_ip4width = 32; 896 return 1; 897#ifndef NOINET6 898 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 899 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 900 return 1; 901#endif 902 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 903 range->ncprange_family = AF_INET; 904 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 905 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 906 range->ncprange_ip4width = 32; 907 return 1; 908 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 909 range->ncprange_family = AF_INET; 910 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 911 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 912 range->ncprange_ip4width = 32; 913 return 1; 914 } 915 916 s = (char *)alloca(len + 1); 917 strncpy(s, data, len); 918 s[len] = '\0'; 919 bits = -1; 920 921 if (data[len] != '\0') { 922 bits = strtol(data + len + 1, &wp, 0); 923 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 924 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 925 return 0; 926 } 927 } 928 929 if ((cp = strchr(data, ':')) == NULL) { 930 range->ncprange_family = AF_INET; 931 932 range->ncprange_ip4addr = GetIpAddr(s); 933 934 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 935 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 936 return 0; 937 } 938 939 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 940 range->ncprange_ip4mask.s_addr = INADDR_ANY; 941 range->ncprange_ip4width = 0; 942 } else if (bits == -1) { 943 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 944 range->ncprange_ip4width = 32; 945 } else if (bits > 32) { 946 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 947 return 0; 948 } else { 949 range->ncprange_ip4mask = bits2mask4(bits); 950 range->ncprange_ip4width = bits; 951 } 952 953 return 1; 954#ifndef NOINET6 955 } else if (strchr(cp + 1, ':') != NULL) { 956 range->ncprange_family = AF_INET6; 957 958 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 959 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 960 return 0; 961 } 962 963 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 964 range->ncprange_ip6width = 0; 965 else 966 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 967 return 1; 968#endif 969 } 970 971 return 0; 972} 973