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 adjust_linklocal(host6); 328 break; 329 #endif 330 331 default: 332 host->ss_family = AF_UNSPEC; 333 break; 334 } 335 } 336 337 void 338 ncpaddr_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 } 368 369 static char * 370 ncpaddr_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 } 400 401 const char * 402 ncpaddr_ntoa(const struct ncpaddr *addr) 403 { 404 return ncpaddr_ntowa(addr); 405 } 406 407 408 int 409 ncpaddr_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 } 444 445 void 446 ncprange_init(struct ncprange *range) 447 { 448 range->ncprange_family = AF_UNSPEC; 449 } 450 451 int 452 ncprange_isset(const struct ncprange *range) 453 { 454 return range->ncprange_family != AF_UNSPEC; 455 } 456 457 int 458 ncprange_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 } 483 484 int 485 ncprange_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 } 504 505 void 506 ncprange_setdefault(struct ncprange *range, int af) 507 { 508 memset(range, '\0', sizeof *range); 509 range->ncprange_family = af; 510 } 511 512 int 513 ncprange_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 } 544 545 int 546 ncprange_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 } 556 557 void 558 ncprange_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 } 580 581 void 582 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 583 { 584 ncprange_sethost(range, addr); 585 ncprange_setwidth(range, width); 586 } 587 588 void 589 ncprange_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 } 611 612 int 613 ncprange_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 } 637 638 void 639 ncprange_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 } 646 647 void 648 ncprange_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 } 655 656 657 int 658 ncprange_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 } 666 667 void 668 ncprange_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 } 703 704 void 705 ncprange_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 } 752 753 int 754 ncprange_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 } 771 772 int 773 ncprange_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 } 781 782 int 783 ncprange_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 } 793 794 int 795 ncprange_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 } 810 811 const char * 812 ncprange_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 853 int 854 ncprange_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 869 870 int 871 ncprange_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