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_isset(const struct ncpaddr *addr) 189 { 190 return addr->ncpaddr_family != AF_UNSPEC; 191 } 192 193 int 194 ncpaddr_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 } 212 213 int 214 ncpaddr_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 } 235 236 void 237 ncpaddr_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 } 254 255 void 256 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 257 { 258 addr->ncpaddr_family = AF_INET; 259 addr->ncpaddr_ip4addr.s_addr = ip; 260 } 261 262 int 263 ncpaddr_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 } 270 271 void 272 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 273 { 274 addr->ncpaddr_family = AF_INET; 275 addr->ncpaddr_ip4addr = ip; 276 } 277 278 int 279 ncpaddr_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 288 void 289 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 290 { 291 addr->ncpaddr_family = AF_INET6; 292 addr->ncpaddr_ip6addr = *ip6; 293 } 294 295 int 296 ncpaddr_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 304 305 void 306 ncpaddr_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 break; 328 #endif 329 330 default: 331 host->ss_family = AF_UNSPEC; 332 break; 333 } 334 } 335 336 void 337 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 338 { 339 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 340 #ifndef NOINET6 341 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 342 #endif 343 344 switch (host->sa_family) { 345 case AF_INET: 346 addr->ncpaddr_family = AF_INET; 347 addr->ncpaddr_ip4addr = host4->sin_addr; 348 break; 349 350 #ifndef NOINET6 351 case AF_INET6: 352 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 353 addr->ncpaddr_family = AF_INET; 354 addr->ncpaddr_ip4addr.s_addr = 355 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 356 } else { 357 addr->ncpaddr_family = AF_INET6; 358 addr->ncpaddr_ip6addr = host6->sin6_addr; 359 } 360 break; 361 #endif 362 363 default: 364 addr->ncpaddr_family = AF_UNSPEC; 365 } 366 } 367 368 static char * 369 ncpaddr_ntowa(const struct ncpaddr *addr) 370 { 371 static char res[NCP_ASCIIBUFFERSIZE]; 372 #ifndef NOINET6 373 struct sockaddr_in6 sin6; 374 #endif 375 376 switch (addr->ncpaddr_family) { 377 case AF_INET: 378 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 379 return res; 380 381 #ifndef NOINET6 382 case AF_INET6: 383 memset(&sin6, '\0', sizeof(sin6)); 384 sin6.sin6_len = sizeof(sin6); 385 sin6.sin6_family = AF_INET6; 386 sin6.sin6_addr = addr->ncpaddr_ip6addr; 387 adjust_linklocal(&sin6); 388 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 389 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 390 break; 391 392 return res; 393 #endif 394 } 395 396 snprintf(res, sizeof res, "<AF_UNSPEC>"); 397 return res; 398 } 399 400 const char * 401 ncpaddr_ntoa(const struct ncpaddr *addr) 402 { 403 return ncpaddr_ntowa(addr); 404 } 405 406 407 int 408 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 409 { 410 struct ncprange range; 411 412 if (!ncprange_aton(&range, ncp, data)) 413 return 0; 414 415 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 416 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 417 return 0; 418 } 419 420 #ifndef NOINET6 421 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 422 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 423 return 0; 424 } 425 #endif 426 427 switch (range.ncprange_family) { 428 case AF_INET: 429 addr->ncpaddr_family = range.ncprange_family; 430 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 431 return 1; 432 433 #ifndef NOINET6 434 case AF_INET6: 435 addr->ncpaddr_family = range.ncprange_family; 436 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 437 return 1; 438 #endif 439 } 440 441 return 0; 442 } 443 444 void 445 ncprange_init(struct ncprange *range) 446 { 447 range->ncprange_family = AF_UNSPEC; 448 } 449 450 int 451 ncprange_isset(const struct ncprange *range) 452 { 453 return range->ncprange_family != AF_UNSPEC; 454 } 455 456 int 457 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 458 { 459 if (range->ncprange_family != cmp->ncprange_family) 460 return 0; 461 462 switch (range->ncprange_family) { 463 case AF_INET: 464 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 465 return 0; 466 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 467 468 #ifndef NOINET6 469 case AF_INET6: 470 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 471 return 0; 472 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 473 sizeof range->ncprange_ip6addr); 474 #endif 475 476 case AF_UNSPEC: 477 return 1; 478 } 479 480 return 0; 481 } 482 483 int 484 ncprange_isdefault(const struct ncprange *range) 485 { 486 switch (range->ncprange_family) { 487 case AF_INET: 488 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 489 return 1; 490 break; 491 492 #ifndef NOINET6 493 case AF_INET6: 494 if (range->ncprange_ip6width == 0 && 495 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 496 return 1; 497 break; 498 #endif 499 } 500 501 return 0; 502 } 503 504 void 505 ncprange_setdefault(struct ncprange *range, int af) 506 { 507 memset(range, '\0', sizeof *range); 508 range->ncprange_family = af; 509 } 510 511 int 512 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 513 { 514 #ifndef NOINET6 515 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 516 const u_char *addrp, *rangep; 517 int bits; 518 #endif 519 520 if (range->ncprange_family != addr->ncpaddr_family) 521 return 0; 522 523 switch (range->ncprange_family) { 524 case AF_INET: 525 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 526 range->ncprange_ip4mask.s_addr); 527 528 #ifndef NOINET6 529 case AF_INET6: 530 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 531 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 532 533 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 534 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 535 return 0; 536 537 return 1; 538 #endif 539 } 540 541 return 0; 542 } 543 544 int 545 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 546 { 547 switch (range->ncprange_family) { 548 case AF_INET: 549 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 550 range->ncprange_ip4mask.s_addr); 551 } 552 553 return 0; 554 } 555 556 void 557 ncprange_copy(struct ncprange *range, const struct ncprange *from) 558 { 559 switch (from->ncprange_family) { 560 case AF_INET: 561 range->ncprange_family = AF_INET; 562 range->ncprange_ip4addr = from->ncprange_ip4addr; 563 range->ncprange_ip4mask = from->ncprange_ip4mask; 564 range->ncprange_ip4width = from->ncprange_ip4width; 565 break; 566 567 #ifndef NOINET6 568 case AF_INET6: 569 range->ncprange_family = AF_INET6; 570 range->ncprange_ip6addr = from->ncprange_ip6addr; 571 range->ncprange_ip6width = from->ncprange_ip6width; 572 break; 573 #endif 574 575 default: 576 range->ncprange_family = AF_UNSPEC; 577 } 578 } 579 580 void 581 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 582 { 583 ncprange_sethost(range, addr); 584 ncprange_setwidth(range, width); 585 } 586 587 void 588 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 589 { 590 switch (from->ncpaddr_family) { 591 case AF_INET: 592 range->ncprange_family = AF_INET; 593 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 594 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 595 range->ncprange_ip4width = 32; 596 break; 597 598 #ifndef NOINET6 599 case AF_INET6: 600 range->ncprange_family = AF_INET6; 601 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 602 range->ncprange_ip6width = 128; 603 break; 604 #endif 605 606 default: 607 range->ncprange_family = AF_UNSPEC; 608 } 609 } 610 611 int 612 ncprange_ishost(const struct ncprange *range) 613 { 614 switch (range->ncprange_family) { 615 case AF_INET: 616 return range->ncprange_ip4width == 32; 617 #ifndef NOINET6 618 case AF_INET6: 619 return range->ncprange_ip6width == 128; 620 #endif 621 } 622 623 return (0); 624 } 625 626 int 627 ncprange_setwidth(struct ncprange *range, int width) 628 { 629 switch (range->ncprange_family) { 630 case AF_INET: 631 if (width < 0 || width > 32) 632 break; 633 range->ncprange_ip4width = width; 634 range->ncprange_ip4mask = bits2mask4(width); 635 break; 636 637 #ifndef NOINET6 638 case AF_INET6: 639 if (width < 0 || width > 128) 640 break; 641 range->ncprange_ip6width = width; 642 break; 643 #endif 644 645 case AF_UNSPEC: 646 return 1; 647 } 648 649 return 0; 650 } 651 652 void 653 ncprange_setip4host(struct ncprange *range, struct in_addr from) 654 { 655 range->ncprange_family = AF_INET; 656 range->ncprange_ip4addr = from; 657 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 658 range->ncprange_ip4width = 32; 659 } 660 661 void 662 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 663 { 664 range->ncprange_family = AF_INET; 665 range->ncprange_ip4addr = from; 666 range->ncprange_ip4mask = msk; 667 range->ncprange_ip4width = mask42bits(msk); 668 } 669 670 671 int 672 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 673 { 674 if (range->ncprange_family != AF_INET) 675 return 0; 676 range->ncprange_ip4mask = mask; 677 range->ncprange_ip4width = mask42bits(mask); 678 return 1; 679 } 680 681 void 682 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 683 const struct sockaddr *mask) 684 { 685 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 686 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 687 #ifndef NOINET6 688 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 689 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 690 #endif 691 692 switch (host->sa_family) { 693 case AF_INET: 694 range->ncprange_family = AF_INET; 695 range->ncprange_ip4addr = host4->sin_addr; 696 if (mask4) { 697 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 698 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 699 } else { 700 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 701 range->ncprange_ip4width = 32; 702 } 703 break; 704 705 #ifndef NOINET6 706 case AF_INET6: 707 range->ncprange_family = AF_INET6; 708 range->ncprange_ip6addr = host6->sin6_addr; 709 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 710 break; 711 #endif 712 713 default: 714 range->ncprange_family = AF_UNSPEC; 715 } 716 } 717 718 void 719 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 720 struct sockaddr_storage *mask) 721 { 722 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 723 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 724 #ifndef NOINET6 725 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 726 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 727 #endif 728 729 memset(host, '\0', sizeof(*host)); 730 if (mask) 731 memset(mask, '\0', sizeof(*mask)); 732 733 switch (range->ncprange_family) { 734 case AF_INET: 735 host4->sin_family = AF_INET; 736 host4->sin_len = sizeof(*host4); 737 host4->sin_addr = range->ncprange_ip4addr; 738 if (mask4) { 739 mask4->sin_family = AF_INET; 740 mask4->sin_len = sizeof(*host4); 741 mask4->sin_addr = range->ncprange_ip4mask; 742 } 743 break; 744 745 #ifndef NOINET6 746 case AF_INET6: 747 host6->sin6_family = AF_INET6; 748 host6->sin6_len = sizeof(*host6); 749 host6->sin6_addr = range->ncprange_ip6addr; 750 if (mask6) { 751 mask6->sin6_family = AF_INET6; 752 mask6->sin6_len = sizeof(*host6); 753 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 754 } 755 break; 756 #endif 757 758 default: 759 host->ss_family = AF_UNSPEC; 760 if (mask) 761 mask->ss_family = AF_UNSPEC; 762 break; 763 } 764 } 765 766 int 767 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 768 { 769 switch (range->ncprange_family) { 770 case AF_INET: 771 addr->ncpaddr_family = AF_INET; 772 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 773 return 1; 774 #ifndef NOINET6 775 case AF_INET6: 776 addr->ncpaddr_family = AF_INET6; 777 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 778 return 1; 779 #endif 780 } 781 782 return 0; 783 } 784 785 int 786 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 787 { 788 if (range->ncprange_family != AF_INET) 789 return 0; 790 791 *addr = range->ncprange_ip4addr; 792 return 1; 793 } 794 795 int 796 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 797 { 798 switch (range->ncprange_family) { 799 case AF_INET: 800 *mask = range->ncprange_ip4mask; 801 return 1; 802 } 803 804 return 0; 805 } 806 807 int 808 ncprange_getwidth(const struct ncprange *range, int *width) 809 { 810 switch (range->ncprange_family) { 811 case AF_INET: 812 *width = range->ncprange_ip4width; 813 return 1; 814 #ifndef NOINET6 815 case AF_INET6: 816 *width = range->ncprange_ip6width; 817 return 1; 818 #endif 819 } 820 821 return 0; 822 } 823 824 const char * 825 ncprange_ntoa(const struct ncprange *range) 826 { 827 char *res; 828 struct ncpaddr addr; 829 int len; 830 831 if (!ncprange_getaddr(range, &addr)) 832 return "<AF_UNSPEC>"; 833 834 res = ncpaddr_ntowa(&addr); 835 len = strlen(res); 836 if (len >= NCP_ASCIIBUFFERSIZE - 1) 837 return res; 838 839 switch (range->ncprange_family) { 840 case AF_INET: 841 if (range->ncprange_ip4width == -1) { 842 /* A non-contiguous mask */ 843 for (; len >= 3; res[len -= 2] = '\0') 844 if (strcmp(res + len - 2, ".0")) 845 break; 846 snprintf(res + len, sizeof res - len, "&0x%08lx", 847 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 848 } else if (range->ncprange_ip4width < 32) 849 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 850 851 return res; 852 853 #ifndef NOINET6 854 case AF_INET6: 855 if (range->ncprange_ip6width != 128) 856 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 857 858 return res; 859 #endif 860 } 861 862 return "<AF_UNSPEC>"; 863 } 864 865 #ifndef NOINET6 866 int 867 ncprange_scopeid(const struct ncprange *range) 868 { 869 const struct in6_addr *sin6; 870 int scopeid = -1; 871 872 if (range->ncprange_family == AF_INET6) { 873 sin6 = &range->ncprange_ip6addr; 874 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 875 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 876 scopeid = -1; 877 } 878 879 return scopeid; 880 } 881 #endif 882 883 int 884 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 885 { 886 int bits, len; 887 char *wp; 888 const char *cp; 889 char *s; 890 891 len = strcspn(data, "/"); 892 893 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 894 range->ncprange_family = AF_INET; 895 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 896 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 897 range->ncprange_ip4width = 32; 898 return 1; 899 #ifndef NOINET6 900 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 901 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 902 return 1; 903 #endif 904 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 905 range->ncprange_family = AF_INET; 906 range->ncprange_ip4addr = ncp->ipcp.my_ip; 907 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 908 range->ncprange_ip4width = 32; 909 return 1; 910 #ifndef NOINET6 911 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 912 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 913 return 1; 914 #endif 915 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 916 range->ncprange_family = AF_INET; 917 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 918 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 919 range->ncprange_ip4width = 32; 920 return 1; 921 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 922 range->ncprange_family = AF_INET; 923 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 924 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 925 range->ncprange_ip4width = 32; 926 return 1; 927 } 928 929 s = (char *)alloca(len + 1); 930 strncpy(s, data, len); 931 s[len] = '\0'; 932 bits = -1; 933 934 if (data[len] != '\0') { 935 bits = strtol(data + len + 1, &wp, 0); 936 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 937 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 938 return 0; 939 } 940 } 941 942 if ((cp = strchr(data, ':')) == NULL) { 943 range->ncprange_family = AF_INET; 944 945 range->ncprange_ip4addr = GetIpAddr(s); 946 947 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 948 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 949 return 0; 950 } 951 952 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 953 range->ncprange_ip4mask.s_addr = INADDR_ANY; 954 range->ncprange_ip4width = 0; 955 } else if (bits == -1) { 956 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 957 range->ncprange_ip4width = 32; 958 } else if (bits > 32) { 959 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 960 return 0; 961 } else { 962 range->ncprange_ip4mask = bits2mask4(bits); 963 range->ncprange_ip4width = bits; 964 } 965 966 return 1; 967 #ifndef NOINET6 968 } else if (strchr(cp + 1, ':') != NULL) { 969 range->ncprange_family = AF_INET6; 970 971 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 972 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 973 return 0; 974 } 975 976 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 977 range->ncprange_ip6width = 0; 978 else 979 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 980 return 1; 981 #endif 982 } 983 984 return 0; 985 } 986