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 #ifdef __OpenBSD__ 32 #include <net/if_types.h> 33 #include <net/route.h> 34 #endif 35 #include <netinet/in.h> 36 #include <netinet/in_systm.h> 37 #include <netinet/ip.h> 38 #include <arpa/inet.h> 39 #include <sys/un.h> 40 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <termios.h> 46 47 #include "log.h" 48 #include "ncpaddr.h" 49 #include "timer.h" 50 #include "fsm.h" 51 #include "defs.h" 52 #include "slcompress.h" 53 #include "iplist.h" 54 #include "throughput.h" 55 #include "mbuf.h" 56 #include "ipcp.h" 57 #include "descriptor.h" 58 #include "layer.h" 59 #include "lqr.h" 60 #include "hdlc.h" 61 #include "lcp.h" 62 #include "ccp.h" 63 #include "link.h" 64 #include "mp.h" 65 #include "ipv6cp.h" 66 #include "ncp.h" 67 68 69 #define ncprange_ip4addr u.ip4.ipaddr 70 #define ncprange_ip4mask u.ip4.mask 71 #define ncprange_ip4width u.ip4.width 72 #define ncpaddr_ip4addr u.ip4addr 73 #ifndef NOINET6 74 #define ncprange_ip6addr u.ip6.ipaddr 75 #define ncprange_ip6width u.ip6.width 76 #define ncpaddr_ip6addr u.ip6addr 77 #endif 78 79 #define NCP_ASCIIBUFFERSIZE 52 80 81 static struct in_addr 82 bits2mask4(int bits) 83 { 84 struct in_addr result; 85 u_int32_t bit = 0x80000000; 86 87 result.s_addr = 0; 88 89 while (bits) { 90 result.s_addr |= bit; 91 bit >>= 1; 92 bits--; 93 } 94 95 result.s_addr = htonl(result.s_addr); 96 return result; 97 } 98 99 static int 100 mask42bits(struct in_addr mask) 101 { 102 u_int32_t msk = ntohl(mask.s_addr); 103 u_int32_t tst; 104 int ret; 105 106 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 107 if (msk & tst) 108 break; 109 110 for (tst <<= 1; tst; tst <<= 1) 111 if (!(msk & tst)) 112 break; 113 114 return tst ? -1 : ret; 115 } 116 117 #ifndef NOINET6 118 static struct in6_addr 119 bits2mask6(int bits) 120 { 121 struct in6_addr result; 122 u_int32_t bit = 0x80; 123 u_char *c = result.s6_addr; 124 125 memset(&result, '\0', sizeof result); 126 127 while (bits) { 128 if (bit == 0) { 129 bit = 0x80; 130 c++; 131 } 132 *c |= bit; 133 bit >>= 1; 134 bits--; 135 } 136 137 return result; 138 } 139 140 static int 141 mask62bits(const struct in6_addr *mask) 142 { 143 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 144 const u_char *c, *p, *end; 145 int masklen; 146 147 p = (const u_char *)mask; 148 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 149 masklen += 8; 150 151 if (p < end) { 152 for (c = masks; c < masks + sizeof masks; c++) 153 if (*c == *p) { 154 masklen += c - masks; 155 break; 156 } 157 } 158 159 return masklen; 160 } 161 162 static void 163 adjust_linklocal(struct sockaddr_in6 *sin6) 164 { 165 /* XXX: ?????!?!?!!!!! This is horrible ! */ 166 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 167 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 168 sin6->sin6_scope_id = 169 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 170 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 171 } 172 } 173 #endif 174 175 void 176 ncpaddr_init(struct ncpaddr *addr) 177 { 178 addr->ncpaddr_family = AF_UNSPEC; 179 } 180 181 int 182 ncpaddr_isset(const struct ncpaddr *addr) 183 { 184 return 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 break; 322 #endif 323 324 default: 325 host->ss_family = AF_UNSPEC; 326 break; 327 } 328 } 329 330 void 331 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 332 { 333 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 334 #ifndef NOINET6 335 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 336 #endif 337 338 switch (host->sa_family) { 339 case AF_INET: 340 addr->ncpaddr_family = AF_INET; 341 addr->ncpaddr_ip4addr = host4->sin_addr; 342 break; 343 344 #ifndef NOINET6 345 case AF_INET6: 346 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 347 addr->ncpaddr_family = AF_INET; 348 addr->ncpaddr_ip4addr.s_addr = 349 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 350 } else { 351 addr->ncpaddr_family = AF_INET6; 352 addr->ncpaddr_ip6addr = host6->sin6_addr; 353 } 354 break; 355 #endif 356 357 default: 358 addr->ncpaddr_family = AF_UNSPEC; 359 } 360 } 361 362 static char * 363 ncpaddr_ntowa(const struct ncpaddr *addr) 364 { 365 static char res[NCP_ASCIIBUFFERSIZE]; 366 #ifndef NOINET6 367 struct sockaddr_in6 sin6; 368 #endif 369 370 switch (addr->ncpaddr_family) { 371 case AF_INET: 372 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 373 return res; 374 375 #ifndef NOINET6 376 case AF_INET6: 377 memset(&sin6, '\0', sizeof(sin6)); 378 sin6.sin6_len = sizeof(sin6); 379 sin6.sin6_family = AF_INET6; 380 sin6.sin6_addr = addr->ncpaddr_ip6addr; 381 adjust_linklocal(&sin6); 382 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 383 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 384 break; 385 386 return res; 387 #endif 388 } 389 390 snprintf(res, sizeof res, "<AF_UNSPEC>"); 391 return res; 392 } 393 394 const char * 395 ncpaddr_ntoa(const struct ncpaddr *addr) 396 { 397 return ncpaddr_ntowa(addr); 398 } 399 400 401 int 402 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 403 { 404 struct ncprange range; 405 406 if (!ncprange_aton(&range, ncp, data)) 407 return 0; 408 409 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 410 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 411 return 0; 412 } 413 414 #ifndef NOINET6 415 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 416 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 417 return 0; 418 } 419 #endif 420 421 switch (range.ncprange_family) { 422 case AF_INET: 423 addr->ncpaddr_family = range.ncprange_family; 424 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 425 return 1; 426 427 #ifndef NOINET6 428 case AF_INET6: 429 addr->ncpaddr_family = range.ncprange_family; 430 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 431 return 1; 432 #endif 433 } 434 435 return 0; 436 } 437 438 void 439 ncprange_init(struct ncprange *range) 440 { 441 range->ncprange_family = AF_UNSPEC; 442 } 443 444 int 445 ncprange_isset(const struct ncprange *range) 446 { 447 return range->ncprange_family != AF_UNSPEC; 448 } 449 450 int 451 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 452 { 453 if (range->ncprange_family != cmp->ncprange_family) 454 return 0; 455 456 switch (range->ncprange_family) { 457 case AF_INET: 458 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 459 return 0; 460 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 461 462 #ifndef NOINET6 463 case AF_INET6: 464 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 465 return 0; 466 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 467 sizeof range->ncprange_ip6addr); 468 #endif 469 470 case AF_UNSPEC: 471 return 1; 472 } 473 474 return 0; 475 } 476 477 int 478 ncprange_isdefault(const struct ncprange *range) 479 { 480 switch (range->ncprange_family) { 481 case AF_INET: 482 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 483 return 1; 484 break; 485 486 #ifndef NOINET6 487 case AF_INET6: 488 if (range->ncprange_ip6width == 0 && 489 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 490 return 1; 491 break; 492 #endif 493 } 494 495 return 0; 496 } 497 498 void 499 ncprange_setdefault(struct ncprange *range, int af) 500 { 501 memset(range, '\0', sizeof *range); 502 range->ncprange_family = af; 503 } 504 505 int 506 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 507 { 508 #ifndef NOINET6 509 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 510 const u_char *addrp, *rangep; 511 int bits; 512 #endif 513 514 if (range->ncprange_family != addr->ncpaddr_family) 515 return 0; 516 517 switch (range->ncprange_family) { 518 case AF_INET: 519 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 520 range->ncprange_ip4mask.s_addr); 521 522 #ifndef NOINET6 523 case AF_INET6: 524 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 525 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 526 527 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 528 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 529 return 0; 530 531 return 1; 532 #endif 533 } 534 535 return 0; 536 } 537 538 int 539 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 540 { 541 switch (range->ncprange_family) { 542 case AF_INET: 543 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 544 range->ncprange_ip4mask.s_addr); 545 } 546 547 return 0; 548 } 549 550 void 551 ncprange_copy(struct ncprange *range, const struct ncprange *from) 552 { 553 switch (from->ncprange_family) { 554 case AF_INET: 555 range->ncprange_family = AF_INET; 556 range->ncprange_ip4addr = from->ncprange_ip4addr; 557 range->ncprange_ip4mask = from->ncprange_ip4mask; 558 range->ncprange_ip4width = from->ncprange_ip4width; 559 break; 560 561 #ifndef NOINET6 562 case AF_INET6: 563 range->ncprange_family = AF_INET6; 564 range->ncprange_ip6addr = from->ncprange_ip6addr; 565 range->ncprange_ip6width = from->ncprange_ip6width; 566 break; 567 #endif 568 569 default: 570 range->ncprange_family = AF_UNSPEC; 571 } 572 } 573 574 void 575 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 576 { 577 ncprange_sethost(range, addr); 578 ncprange_setwidth(range, width); 579 } 580 581 void 582 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 583 { 584 switch (from->ncpaddr_family) { 585 case AF_INET: 586 range->ncprange_family = AF_INET; 587 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 588 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 589 range->ncprange_ip4mask.s_addr = INADDR_ANY; 590 range->ncprange_ip4width = 0; 591 } else { 592 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 593 range->ncprange_ip4width = 32; 594 } 595 break; 596 597 #ifndef NOINET6 598 case AF_INET6: 599 range->ncprange_family = AF_INET6; 600 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 601 range->ncprange_ip6width = 128; 602 break; 603 #endif 604 605 default: 606 range->ncprange_family = AF_UNSPEC; 607 } 608 } 609 610 int 611 ncprange_ishost(const struct ncprange *range) 612 { 613 switch (range->ncprange_family) { 614 case AF_INET: 615 return range->ncprange_ip4width == 32; 616 #ifndef NOINET6 617 case AF_INET6: 618 return range->ncprange_ip6width == 128; 619 #endif 620 } 621 622 return (0); 623 } 624 625 int 626 ncprange_setwidth(struct ncprange *range, int width) 627 { 628 switch (range->ncprange_family) { 629 case AF_INET: 630 if (width < 0 || width > 32) 631 break; 632 range->ncprange_ip4width = width; 633 range->ncprange_ip4mask = bits2mask4(width); 634 break; 635 636 #ifndef NOINET6 637 case AF_INET6: 638 if (width < 0 || width > 128) 639 break; 640 range->ncprange_ip6width = width; 641 break; 642 #endif 643 644 case AF_UNSPEC: 645 return 1; 646 } 647 648 return 0; 649 } 650 651 void 652 ncprange_setip4host(struct ncprange *range, struct in_addr from) 653 { 654 range->ncprange_family = AF_INET; 655 range->ncprange_ip4addr = from; 656 if (from.s_addr == INADDR_ANY) { 657 range->ncprange_ip4mask.s_addr = INADDR_ANY; 658 range->ncprange_ip4width = 0; 659 } else { 660 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 661 range->ncprange_ip4width = 32; 662 } 663 } 664 665 void 666 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 667 { 668 range->ncprange_family = AF_INET; 669 range->ncprange_ip4addr = from; 670 range->ncprange_ip4mask = msk; 671 range->ncprange_ip4width = mask42bits(msk); 672 } 673 674 675 int 676 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 677 { 678 if (range->ncprange_family != AF_INET) 679 return 0; 680 range->ncprange_ip4mask = mask; 681 range->ncprange_ip4width = mask42bits(mask); 682 return 1; 683 } 684 685 void 686 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 687 const struct sockaddr *mask) 688 { 689 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 690 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 691 #ifndef NOINET6 692 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 693 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 694 #endif 695 696 switch (host->sa_family) { 697 case AF_INET: 698 range->ncprange_family = AF_INET; 699 range->ncprange_ip4addr = host4->sin_addr; 700 if (host4->sin_addr.s_addr == INADDR_ANY) { 701 range->ncprange_ip4mask.s_addr = INADDR_ANY; 702 range->ncprange_ip4width = 0; 703 } else if (mask4 && mask4->sin_family == AF_INET) { 704 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 705 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 706 } else { 707 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 708 range->ncprange_ip4width = 32; 709 } 710 break; 711 712 #ifndef NOINET6 713 case AF_INET6: 714 range->ncprange_family = AF_INET6; 715 range->ncprange_ip6addr = host6->sin6_addr; 716 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 717 break; 718 #endif 719 720 default: 721 range->ncprange_family = AF_UNSPEC; 722 } 723 } 724 725 void 726 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 727 struct sockaddr_storage *mask) 728 { 729 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 730 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 731 #ifndef NOINET6 732 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 733 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 734 #endif 735 736 memset(host, '\0', sizeof(*host)); 737 if (mask) 738 memset(mask, '\0', sizeof(*mask)); 739 740 switch (range->ncprange_family) { 741 case AF_INET: 742 host4->sin_family = AF_INET; 743 host4->sin_len = sizeof(*host4); 744 host4->sin_addr = range->ncprange_ip4addr; 745 if (mask4) { 746 mask4->sin_family = AF_INET; 747 mask4->sin_len = sizeof(*host4); 748 mask4->sin_addr = range->ncprange_ip4mask; 749 } 750 break; 751 752 #ifndef NOINET6 753 case AF_INET6: 754 host6->sin6_family = AF_INET6; 755 host6->sin6_len = sizeof(*host6); 756 host6->sin6_addr = range->ncprange_ip6addr; 757 if (mask6) { 758 mask6->sin6_family = AF_INET6; 759 mask6->sin6_len = sizeof(*host6); 760 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 761 } 762 break; 763 #endif 764 765 default: 766 host->ss_family = AF_UNSPEC; 767 if (mask) 768 mask->ss_family = AF_UNSPEC; 769 break; 770 } 771 } 772 773 int 774 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 775 { 776 switch (range->ncprange_family) { 777 case AF_INET: 778 addr->ncpaddr_family = AF_INET; 779 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 780 return 1; 781 #ifndef NOINET6 782 case AF_INET6: 783 addr->ncpaddr_family = AF_INET6; 784 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 785 return 1; 786 #endif 787 } 788 789 return 0; 790 } 791 792 int 793 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 794 { 795 if (range->ncprange_family != AF_INET) 796 return 0; 797 798 *addr = range->ncprange_ip4addr; 799 return 1; 800 } 801 802 int 803 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 804 { 805 switch (range->ncprange_family) { 806 case AF_INET: 807 *mask = range->ncprange_ip4mask; 808 return 1; 809 } 810 811 return 0; 812 } 813 814 int 815 ncprange_getwidth(const struct ncprange *range, int *width) 816 { 817 switch (range->ncprange_family) { 818 case AF_INET: 819 *width = range->ncprange_ip4width; 820 return 1; 821 #ifndef NOINET6 822 case AF_INET6: 823 *width = range->ncprange_ip6width; 824 return 1; 825 #endif 826 } 827 828 return 0; 829 } 830 831 const char * 832 ncprange_ntoa(const struct ncprange *range) 833 { 834 char *res; 835 struct ncpaddr addr; 836 int len; 837 838 if (!ncprange_getaddr(range, &addr)) 839 return "<AF_UNSPEC>"; 840 841 res = ncpaddr_ntowa(&addr); 842 len = strlen(res); 843 if (len >= NCP_ASCIIBUFFERSIZE - 1) 844 return res; 845 846 switch (range->ncprange_family) { 847 case AF_INET: 848 if (range->ncprange_ip4width == -1) { 849 /* A non-contiguous mask */ 850 for (; len >= 3; res[len -= 2] = '\0') 851 if (strcmp(res + len - 2, ".0")) 852 break; 853 snprintf(res + len, sizeof res - len, "&0x%08lx", 854 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 855 } else if (range->ncprange_ip4width < 32) 856 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 857 858 return res; 859 860 #ifndef NOINET6 861 case AF_INET6: 862 if (range->ncprange_ip6width != 128) 863 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 864 865 return res; 866 #endif 867 } 868 869 return "<AF_UNSPEC>"; 870 } 871 872 #ifndef NOINET6 873 int 874 ncprange_scopeid(const struct ncprange *range) 875 { 876 const struct in6_addr *sin6; 877 int scopeid = -1; 878 879 if (range->ncprange_family == AF_INET6) { 880 sin6 = &range->ncprange_ip6addr; 881 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 882 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 883 scopeid = -1; 884 } 885 886 return scopeid; 887 } 888 #endif 889 890 int 891 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 892 { 893 int bits, len; 894 char *wp; 895 const char *cp; 896 char *s; 897 898 len = strcspn(data, "/"); 899 900 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 901 range->ncprange_family = AF_INET; 902 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 903 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 904 range->ncprange_ip4width = 32; 905 return 1; 906 #ifndef NOINET6 907 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 908 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 909 return 1; 910 #endif 911 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 912 range->ncprange_family = AF_INET; 913 range->ncprange_ip4addr = ncp->ipcp.my_ip; 914 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 915 range->ncprange_ip4width = 32; 916 return 1; 917 #ifndef NOINET6 918 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 919 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 920 return 1; 921 #endif 922 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 923 range->ncprange_family = AF_INET; 924 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 925 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 926 range->ncprange_ip4width = 32; 927 return 1; 928 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 929 range->ncprange_family = AF_INET; 930 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 931 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 932 range->ncprange_ip4width = 32; 933 return 1; 934 } 935 936 s = (char *)alloca(len + 1); 937 strncpy(s, data, len); 938 s[len] = '\0'; 939 bits = -1; 940 941 if (data[len] != '\0') { 942 bits = strtol(data + len + 1, &wp, 0); 943 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 944 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 945 return 0; 946 } 947 } 948 949 if ((cp = strchr(data, ':')) == NULL) { 950 range->ncprange_family = AF_INET; 951 952 range->ncprange_ip4addr = GetIpAddr(s); 953 954 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 955 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 956 return 0; 957 } 958 959 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 960 range->ncprange_ip4mask.s_addr = INADDR_ANY; 961 range->ncprange_ip4width = 0; 962 } else if (bits == -1) { 963 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 964 range->ncprange_ip4width = 32; 965 } else if (bits > 32) { 966 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 967 return 0; 968 } else { 969 range->ncprange_ip4mask = bits2mask4(bits); 970 range->ncprange_ip4width = bits; 971 } 972 973 return 1; 974 #ifndef NOINET6 975 } else if (strchr(cp + 1, ':') != NULL) { 976 range->ncprange_family = AF_INET6; 977 978 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 979 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 980 return 0; 981 } 982 983 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 984 range->ncprange_ip6width = 0; 985 else 986 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 987 return 1; 988 #endif 989 } 990 991 return 0; 992 } 993