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 * $FreeBSD$ 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 87 static struct in_addr 88 bits2mask4(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 } 104 105 static int 106 mask42bits(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 124 static struct in6_addr 125 bits2mask6(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 } 145 146 static int 147 mask62bits(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 } 167 168 static void 169 adjust_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 180 181 void 182 ncpaddr_init(struct ncpaddr *addr) 183 { 184 addr->ncpaddr_family = AF_UNSPEC; 185 } 186 187 int 188 ncpaddr_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 } 206 207 int 208 ncpaddr_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 } 229 230 void 231 ncpaddr_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 } 248 249 void 250 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 251 { 252 addr->ncpaddr_family = AF_INET; 253 addr->ncpaddr_ip4addr.s_addr = ip; 254 } 255 256 int 257 ncpaddr_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 } 264 265 void 266 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 267 { 268 addr->ncpaddr_family = AF_INET; 269 addr->ncpaddr_ip4addr = ip; 270 } 271 272 int 273 ncpaddr_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 282 void 283 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 284 { 285 addr->ncpaddr_family = AF_INET6; 286 addr->ncpaddr_ip6addr = *ip6; 287 } 288 289 int 290 ncpaddr_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 298 299 void 300 ncpaddr_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 } 330 331 void 332 ncpaddr_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 } 362 363 static char * 364 ncpaddr_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 } 394 395 const char * 396 ncpaddr_ntoa(const struct ncpaddr *addr) 397 { 398 return ncpaddr_ntowa(addr); 399 } 400 401 402 int 403 ncpaddr_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 } 438 439 void 440 ncprange_init(struct ncprange *range) 441 { 442 range->ncprange_family = AF_UNSPEC; 443 } 444 445 int 446 ncprange_isset(const struct ncprange *range) 447 { 448 return range->ncprange_family != AF_UNSPEC; 449 } 450 451 int 452 ncprange_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 } 477 478 int 479 ncprange_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 } 498 499 void 500 ncprange_setdefault(struct ncprange *range, int af) 501 { 502 memset(range, '\0', sizeof *range); 503 range->ncprange_family = af; 504 } 505 506 int 507 ncprange_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 } 538 539 int 540 ncprange_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 } 550 551 void 552 ncprange_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 } 574 575 void 576 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 577 { 578 ncprange_sethost(range, addr); 579 ncprange_setwidth(range, width); 580 } 581 582 void 583 ncprange_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 } 605 606 int 607 ncprange_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 } 631 632 void 633 ncprange_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 } 640 641 void 642 ncprange_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 } 649 650 651 int 652 ncprange_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 } 660 661 void 662 ncprange_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 } 697 698 void 699 ncprange_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 } 746 747 int 748 ncprange_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 } 765 766 int 767 ncprange_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 } 775 776 int 777 ncprange_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 } 787 788 int 789 ncprange_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 } 804 805 const char * 806 ncprange_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 847 int 848 ncprange_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 863 864 int 865 ncprange_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