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 <netinet/in.h> 32 #include <netinet/in_systm.h> 33 #include <netinet/ip.h> 34 #include <arpa/inet.h> 35 #include <sys/un.h> 36 37 #include <netdb.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <termios.h> 42 43 #include "log.h" 44 #include "ncpaddr.h" 45 #include "timer.h" 46 #include "fsm.h" 47 #include "defs.h" 48 #include "slcompress.h" 49 #include "iplist.h" 50 #include "throughput.h" 51 #include "mbuf.h" 52 #include "ipcp.h" 53 #include "descriptor.h" 54 #include "layer.h" 55 #include "lqr.h" 56 #include "hdlc.h" 57 #include "lcp.h" 58 #include "ccp.h" 59 #include "link.h" 60 #include "mp.h" 61 #include "ipv6cp.h" 62 #include "ncp.h" 63 64 65 #define ncprange_ip4addr u.ip4.ipaddr 66 #define ncprange_ip4mask u.ip4.mask 67 #define ncprange_ip4width u.ip4.width 68 #define ncpaddr_ip4addr u.ip4addr 69 #ifndef NOINET6 70 #define ncprange_ip6addr u.ip6.ipaddr 71 #define ncprange_ip6width u.ip6.width 72 #define ncpaddr_ip6addr u.ip6addr 73 #endif 74 75 #define NCP_ASCIIBUFFERSIZE 52 76 77 static struct in_addr 78 bits2mask4(int bits) 79 { 80 struct in_addr result; 81 u_int32_t bit = 0x80000000; 82 83 result.s_addr = 0; 84 85 while (bits) { 86 result.s_addr |= bit; 87 bit >>= 1; 88 bits--; 89 } 90 91 result.s_addr = htonl(result.s_addr); 92 return result; 93 } 94 95 static int 96 mask42bits(struct in_addr mask) 97 { 98 u_int32_t msk = ntohl(mask.s_addr); 99 u_int32_t tst; 100 int ret; 101 102 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 103 if (msk & tst) 104 break; 105 106 for (tst <<= 1; tst; tst <<= 1) 107 if (!(msk & tst)) 108 break; 109 110 return tst ? -1 : ret; 111 } 112 113 #ifndef NOINET6 114 static struct in6_addr 115 bits2mask6(int bits) 116 { 117 struct in6_addr result; 118 u_int32_t bit = 0x80; 119 u_char *c = result.s6_addr; 120 121 memset(&result, '\0', sizeof result); 122 123 while (bits) { 124 if (bit == 0) { 125 bit = 0x80; 126 c++; 127 } 128 *c |= bit; 129 bit >>= 1; 130 bits--; 131 } 132 133 return result; 134 } 135 136 static int 137 mask62bits(const struct in6_addr *mask) 138 { 139 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 140 const u_char *c, *p, *end; 141 int masklen; 142 143 p = (const u_char *)mask; 144 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 145 masklen += 8; 146 147 if (p < end) { 148 for (c = masks; c < masks + sizeof masks; c++) 149 if (*c == *p) { 150 masklen += c - masks; 151 break; 152 } 153 } 154 155 return masklen; 156 } 157 158 static void 159 adjust_linklocal(struct sockaddr_in6 *sin6) 160 { 161 /* XXX: ?????!?!?!!!!! This is horrible ! */ 162 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 163 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 164 sin6->sin6_scope_id = 165 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 166 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 167 } 168 } 169 #endif 170 171 void 172 ncpaddr_init(struct ncpaddr *addr) 173 { 174 addr->ncpaddr_family = AF_UNSPEC; 175 } 176 177 int 178 ncpaddr_isset(const struct ncpaddr *addr) 179 { 180 return addr->ncpaddr_family != AF_UNSPEC; 181 } 182 183 int 184 ncpaddr_isdefault(const struct ncpaddr *addr) 185 { 186 switch (addr->ncpaddr_family) { 187 case AF_INET: 188 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 189 return 1; 190 break; 191 192 #ifndef NOINET6 193 case AF_INET6: 194 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 195 return 1; 196 break; 197 #endif 198 } 199 200 return 0; 201 } 202 203 int 204 ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 205 { 206 if (addr->ncpaddr_family != cmp->ncpaddr_family) 207 return 0; 208 209 switch (addr->ncpaddr_family) { 210 case AF_INET: 211 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 212 213 #ifndef NOINET6 214 case AF_INET6: 215 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 216 sizeof addr->ncpaddr_ip6addr); 217 #endif 218 219 case AF_UNSPEC: 220 return 1; 221 } 222 223 return 0; 224 } 225 226 void 227 ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 228 { 229 switch (from->ncpaddr_family) { 230 case AF_INET: 231 addr->ncpaddr_family = AF_INET; 232 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 233 break; 234 #ifndef NOINET6 235 case AF_INET6: 236 addr->ncpaddr_family = AF_INET6; 237 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 238 break; 239 #endif 240 default: 241 addr->ncpaddr_family = AF_UNSPEC; 242 } 243 } 244 245 void 246 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 247 { 248 addr->ncpaddr_family = AF_INET; 249 addr->ncpaddr_ip4addr.s_addr = ip; 250 } 251 252 int 253 ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 254 { 255 if (addr->ncpaddr_family != AF_INET) 256 return 0; 257 *ip = addr->ncpaddr_ip4addr.s_addr; 258 return 1; 259 } 260 261 void 262 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 263 { 264 addr->ncpaddr_family = AF_INET; 265 addr->ncpaddr_ip4addr = ip; 266 } 267 268 int 269 ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 270 { 271 if (addr->ncpaddr_family != AF_INET) 272 return 0; 273 *ip = addr->ncpaddr_ip4addr; 274 return 1; 275 } 276 277 #ifndef NOINET6 278 void 279 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 280 { 281 addr->ncpaddr_family = AF_INET6; 282 addr->ncpaddr_ip6addr = *ip6; 283 } 284 285 int 286 ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 287 { 288 if (addr->ncpaddr_family != AF_INET6) 289 return 0; 290 *ip6 = addr->ncpaddr_ip6addr; 291 return 1; 292 } 293 #endif 294 295 void 296 ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 297 { 298 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 299 #ifndef NOINET6 300 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 301 #endif 302 303 memset(host, '\0', sizeof(*host)); 304 305 switch (addr->ncpaddr_family) { 306 case AF_INET: 307 host4->sin_family = AF_INET; 308 host4->sin_len = sizeof(*host4); 309 host4->sin_addr = addr->ncpaddr_ip4addr; 310 break; 311 312 #ifndef NOINET6 313 case AF_INET6: 314 host6->sin6_family = AF_INET6; 315 host6->sin6_len = sizeof(*host6); 316 host6->sin6_addr = addr->ncpaddr_ip6addr; 317 break; 318 #endif 319 320 default: 321 host->ss_family = AF_UNSPEC; 322 break; 323 } 324 } 325 326 void 327 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 328 { 329 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 330 #ifndef NOINET6 331 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 332 #endif 333 334 switch (host->sa_family) { 335 case AF_INET: 336 addr->ncpaddr_family = AF_INET; 337 addr->ncpaddr_ip4addr = host4->sin_addr; 338 break; 339 340 #ifndef NOINET6 341 case AF_INET6: 342 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 343 addr->ncpaddr_family = AF_INET; 344 addr->ncpaddr_ip4addr.s_addr = 345 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 346 } else { 347 addr->ncpaddr_family = AF_INET6; 348 addr->ncpaddr_ip6addr = host6->sin6_addr; 349 } 350 break; 351 #endif 352 353 default: 354 addr->ncpaddr_family = AF_UNSPEC; 355 } 356 } 357 358 static char * 359 ncpaddr_ntowa(const struct ncpaddr *addr) 360 { 361 static char res[NCP_ASCIIBUFFERSIZE]; 362 #ifndef NOINET6 363 struct sockaddr_in6 sin6; 364 #endif 365 366 switch (addr->ncpaddr_family) { 367 case AF_INET: 368 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 369 return res; 370 371 #ifndef NOINET6 372 case AF_INET6: 373 memset(&sin6, '\0', sizeof(sin6)); 374 sin6.sin6_len = sizeof(sin6); 375 sin6.sin6_family = AF_INET6; 376 sin6.sin6_addr = addr->ncpaddr_ip6addr; 377 adjust_linklocal(&sin6); 378 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 379 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 380 break; 381 382 return res; 383 #endif 384 } 385 386 snprintf(res, sizeof res, "<AF_UNSPEC>"); 387 return res; 388 } 389 390 const char * 391 ncpaddr_ntoa(const struct ncpaddr *addr) 392 { 393 return ncpaddr_ntowa(addr); 394 } 395 396 397 int 398 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 399 { 400 struct ncprange range; 401 402 if (!ncprange_aton(&range, ncp, data)) 403 return 0; 404 405 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 406 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 407 return 0; 408 } 409 410 #ifndef NOINET6 411 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 412 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 413 return 0; 414 } 415 #endif 416 417 switch (range.ncprange_family) { 418 case AF_INET: 419 addr->ncpaddr_family = range.ncprange_family; 420 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 421 return 1; 422 423 #ifndef NOINET6 424 case AF_INET6: 425 addr->ncpaddr_family = range.ncprange_family; 426 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 427 return 1; 428 #endif 429 } 430 431 return 0; 432 } 433 434 void 435 ncprange_init(struct ncprange *range) 436 { 437 range->ncprange_family = AF_UNSPEC; 438 } 439 440 int 441 ncprange_isset(const struct ncprange *range) 442 { 443 return range->ncprange_family != AF_UNSPEC; 444 } 445 446 int 447 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 448 { 449 if (range->ncprange_family != cmp->ncprange_family) 450 return 0; 451 452 switch (range->ncprange_family) { 453 case AF_INET: 454 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 455 return 0; 456 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 457 458 #ifndef NOINET6 459 case AF_INET6: 460 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 461 return 0; 462 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 463 sizeof range->ncprange_ip6addr); 464 #endif 465 466 case AF_UNSPEC: 467 return 1; 468 } 469 470 return 0; 471 } 472 473 int 474 ncprange_isdefault(const struct ncprange *range) 475 { 476 switch (range->ncprange_family) { 477 case AF_INET: 478 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 479 return 1; 480 break; 481 482 #ifndef NOINET6 483 case AF_INET6: 484 if (range->ncprange_ip6width == 0 && 485 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 486 return 1; 487 break; 488 #endif 489 } 490 491 return 0; 492 } 493 494 void 495 ncprange_setdefault(struct ncprange *range, int af) 496 { 497 memset(range, '\0', sizeof *range); 498 range->ncprange_family = af; 499 } 500 501 int 502 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 503 { 504 #ifndef NOINET6 505 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 506 const u_char *addrp, *rangep; 507 int bits; 508 #endif 509 510 if (range->ncprange_family != addr->ncpaddr_family) 511 return 0; 512 513 switch (range->ncprange_family) { 514 case AF_INET: 515 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 516 range->ncprange_ip4mask.s_addr); 517 518 #ifndef NOINET6 519 case AF_INET6: 520 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 521 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 522 523 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 524 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 525 return 0; 526 527 return 1; 528 #endif 529 } 530 531 return 0; 532 } 533 534 int 535 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 536 { 537 switch (range->ncprange_family) { 538 case AF_INET: 539 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 540 range->ncprange_ip4mask.s_addr); 541 } 542 543 return 0; 544 } 545 546 void 547 ncprange_copy(struct ncprange *range, const struct ncprange *from) 548 { 549 switch (from->ncprange_family) { 550 case AF_INET: 551 range->ncprange_family = AF_INET; 552 range->ncprange_ip4addr = from->ncprange_ip4addr; 553 range->ncprange_ip4mask = from->ncprange_ip4mask; 554 range->ncprange_ip4width = from->ncprange_ip4width; 555 break; 556 557 #ifndef NOINET6 558 case AF_INET6: 559 range->ncprange_family = AF_INET6; 560 range->ncprange_ip6addr = from->ncprange_ip6addr; 561 range->ncprange_ip6width = from->ncprange_ip6width; 562 break; 563 #endif 564 565 default: 566 range->ncprange_family = AF_UNSPEC; 567 } 568 } 569 570 void 571 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 572 { 573 ncprange_sethost(range, addr); 574 ncprange_setwidth(range, width); 575 } 576 577 void 578 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 579 { 580 switch (from->ncpaddr_family) { 581 case AF_INET: 582 range->ncprange_family = AF_INET; 583 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 584 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 585 range->ncprange_ip4mask.s_addr = INADDR_ANY; 586 range->ncprange_ip4width = 0; 587 } else { 588 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 589 range->ncprange_ip4width = 32; 590 } 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_ishost(const struct ncprange *range) 608 { 609 switch (range->ncprange_family) { 610 case AF_INET: 611 return range->ncprange_ip4width == 32; 612 #ifndef NOINET6 613 case AF_INET6: 614 return range->ncprange_ip6width == 128; 615 #endif 616 } 617 618 return (0); 619 } 620 621 int 622 ncprange_setwidth(struct ncprange *range, int width) 623 { 624 switch (range->ncprange_family) { 625 case AF_INET: 626 if (width < 0 || width > 32) 627 break; 628 range->ncprange_ip4width = width; 629 range->ncprange_ip4mask = bits2mask4(width); 630 break; 631 632 #ifndef NOINET6 633 case AF_INET6: 634 if (width < 0 || width > 128) 635 break; 636 range->ncprange_ip6width = width; 637 break; 638 #endif 639 640 case AF_UNSPEC: 641 return 1; 642 } 643 644 return 0; 645 } 646 647 void 648 ncprange_setip4host(struct ncprange *range, struct in_addr from) 649 { 650 range->ncprange_family = AF_INET; 651 range->ncprange_ip4addr = from; 652 if (from.s_addr == INADDR_ANY) { 653 range->ncprange_ip4mask.s_addr = INADDR_ANY; 654 range->ncprange_ip4width = 0; 655 } else { 656 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 657 range->ncprange_ip4width = 32; 658 } 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 (host4->sin_addr.s_addr == INADDR_ANY) { 697 range->ncprange_ip4mask.s_addr = INADDR_ANY; 698 range->ncprange_ip4width = 0; 699 } else if (mask4 && mask4->sin_family == AF_INET) { 700 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 701 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 702 } else { 703 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 704 range->ncprange_ip4width = 32; 705 } 706 break; 707 708 #ifndef NOINET6 709 case AF_INET6: 710 range->ncprange_family = AF_INET6; 711 range->ncprange_ip6addr = host6->sin6_addr; 712 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 713 break; 714 #endif 715 716 default: 717 range->ncprange_family = AF_UNSPEC; 718 } 719 } 720 721 void 722 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 723 struct sockaddr_storage *mask) 724 { 725 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 726 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 727 #ifndef NOINET6 728 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 729 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 730 #endif 731 732 memset(host, '\0', sizeof(*host)); 733 if (mask) 734 memset(mask, '\0', sizeof(*mask)); 735 736 switch (range->ncprange_family) { 737 case AF_INET: 738 host4->sin_family = AF_INET; 739 host4->sin_len = sizeof(*host4); 740 host4->sin_addr = range->ncprange_ip4addr; 741 if (mask4) { 742 mask4->sin_family = AF_INET; 743 mask4->sin_len = sizeof(*host4); 744 mask4->sin_addr = range->ncprange_ip4mask; 745 } 746 break; 747 748 #ifndef NOINET6 749 case AF_INET6: 750 host6->sin6_family = AF_INET6; 751 host6->sin6_len = sizeof(*host6); 752 host6->sin6_addr = range->ncprange_ip6addr; 753 if (mask6) { 754 mask6->sin6_family = AF_INET6; 755 mask6->sin6_len = sizeof(*host6); 756 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 757 } 758 break; 759 #endif 760 761 default: 762 host->ss_family = AF_UNSPEC; 763 if (mask) 764 mask->ss_family = AF_UNSPEC; 765 break; 766 } 767 } 768 769 int 770 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 771 { 772 switch (range->ncprange_family) { 773 case AF_INET: 774 addr->ncpaddr_family = AF_INET; 775 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 776 return 1; 777 #ifndef NOINET6 778 case AF_INET6: 779 addr->ncpaddr_family = AF_INET6; 780 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 781 return 1; 782 #endif 783 } 784 785 return 0; 786 } 787 788 int 789 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 790 { 791 if (range->ncprange_family != AF_INET) 792 return 0; 793 794 *addr = range->ncprange_ip4addr; 795 return 1; 796 } 797 798 int 799 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 800 { 801 switch (range->ncprange_family) { 802 case AF_INET: 803 *mask = range->ncprange_ip4mask; 804 return 1; 805 } 806 807 return 0; 808 } 809 810 int 811 ncprange_getwidth(const struct ncprange *range, int *width) 812 { 813 switch (range->ncprange_family) { 814 case AF_INET: 815 *width = range->ncprange_ip4width; 816 return 1; 817 #ifndef NOINET6 818 case AF_INET6: 819 *width = range->ncprange_ip6width; 820 return 1; 821 #endif 822 } 823 824 return 0; 825 } 826 827 const char * 828 ncprange_ntoa(const struct ncprange *range) 829 { 830 char *res; 831 struct ncpaddr addr; 832 int len; 833 834 if (!ncprange_getaddr(range, &addr)) 835 return "<AF_UNSPEC>"; 836 837 res = ncpaddr_ntowa(&addr); 838 len = strlen(res); 839 if (len >= NCP_ASCIIBUFFERSIZE - 1) 840 return res; 841 842 switch (range->ncprange_family) { 843 case AF_INET: 844 if (range->ncprange_ip4width == -1) { 845 /* A non-contiguous mask */ 846 for (; len >= 3; res[len -= 2] = '\0') 847 if (strcmp(res + len - 2, ".0")) 848 break; 849 snprintf(res + len, sizeof res - len, "&0x%08lx", 850 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 851 } else if (range->ncprange_ip4width < 32) 852 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 853 854 return res; 855 856 #ifndef NOINET6 857 case AF_INET6: 858 if (range->ncprange_ip6width != 128) 859 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 860 861 return res; 862 #endif 863 } 864 865 return "<AF_UNSPEC>"; 866 } 867 868 #ifndef NOINET6 869 int 870 ncprange_scopeid(const struct ncprange *range) 871 { 872 const struct in6_addr *sin6; 873 int scopeid = -1; 874 875 if (range->ncprange_family == AF_INET6) { 876 sin6 = &range->ncprange_ip6addr; 877 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 878 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 879 scopeid = -1; 880 } 881 882 return scopeid; 883 } 884 #endif 885 886 int 887 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 888 { 889 int bits, len; 890 char *wp; 891 const char *cp; 892 char *s; 893 894 len = strcspn(data, "/"); 895 896 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 897 range->ncprange_family = AF_INET; 898 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 899 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 900 range->ncprange_ip4width = 32; 901 return 1; 902 #ifndef NOINET6 903 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 904 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 905 return 1; 906 #endif 907 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 908 range->ncprange_family = AF_INET; 909 range->ncprange_ip4addr = ncp->ipcp.my_ip; 910 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 911 range->ncprange_ip4width = 32; 912 return 1; 913 #ifndef NOINET6 914 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 915 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 916 return 1; 917 #endif 918 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 919 range->ncprange_family = AF_INET; 920 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 921 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 922 range->ncprange_ip4width = 32; 923 return 1; 924 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 925 range->ncprange_family = AF_INET; 926 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 927 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 928 range->ncprange_ip4width = 32; 929 return 1; 930 } 931 932 s = (char *)alloca(len + 1); 933 strncpy(s, data, len); 934 s[len] = '\0'; 935 bits = -1; 936 937 if (data[len] != '\0') { 938 bits = strtol(data + len + 1, &wp, 0); 939 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 940 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 941 return 0; 942 } 943 } 944 945 if ((cp = strchr(data, ':')) == NULL) { 946 range->ncprange_family = AF_INET; 947 948 range->ncprange_ip4addr = GetIpAddr(s); 949 950 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 951 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 952 return 0; 953 } 954 955 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 956 range->ncprange_ip4mask.s_addr = INADDR_ANY; 957 range->ncprange_ip4width = 0; 958 } else if (bits == -1) { 959 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 960 range->ncprange_ip4width = 32; 961 } else if (bits > 32) { 962 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 963 return 0; 964 } else { 965 range->ncprange_ip4mask = bits2mask4(bits); 966 range->ncprange_ip4width = bits; 967 } 968 969 return 1; 970 #ifndef NOINET6 971 } else if (strchr(cp + 1, ':') != NULL) { 972 range->ncprange_family = AF_INET6; 973 974 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 975 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 976 return 0; 977 } 978 979 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 980 range->ncprange_ip6width = 0; 981 else 982 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 983 return 1; 984 #endif 985 } 986 987 return 0; 988 } 989