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 0 167 /* 168 * The kernel does not understand sin6_scope_id for routing at this moment. 169 * We should rather keep the embedded ID. 170 * jinmei@kame.net, 20011026 171 */ 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 #endif 179 } 180 #endif 181 182 void 183 ncpaddr_init(struct ncpaddr *addr) 184 { 185 addr->ncpaddr_family = AF_UNSPEC; 186 } 187 188 int 189 ncpaddr_isset(const struct ncpaddr *addr) 190 { 191 return addr->ncpaddr_family != AF_UNSPEC; 192 } 193 194 int 195 ncpaddr_isdefault(const struct ncpaddr *addr) 196 { 197 switch (addr->ncpaddr_family) { 198 case AF_INET: 199 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 200 return 1; 201 break; 202 203 #ifndef NOINET6 204 case AF_INET6: 205 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 206 return 1; 207 break; 208 #endif 209 } 210 211 return 0; 212 } 213 214 int 215 ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 216 { 217 if (addr->ncpaddr_family != cmp->ncpaddr_family) 218 return 0; 219 220 switch (addr->ncpaddr_family) { 221 case AF_INET: 222 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 223 224 #ifndef NOINET6 225 case AF_INET6: 226 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 227 sizeof addr->ncpaddr_ip6addr); 228 #endif 229 230 case AF_UNSPEC: 231 return 1; 232 } 233 234 return 0; 235 } 236 237 void 238 ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 239 { 240 switch (from->ncpaddr_family) { 241 case AF_INET: 242 addr->ncpaddr_family = AF_INET; 243 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 244 break; 245 #ifndef NOINET6 246 case AF_INET6: 247 addr->ncpaddr_family = AF_INET6; 248 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 249 break; 250 #endif 251 default: 252 addr->ncpaddr_family = AF_UNSPEC; 253 } 254 } 255 256 void 257 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 258 { 259 addr->ncpaddr_family = AF_INET; 260 addr->ncpaddr_ip4addr.s_addr = ip; 261 } 262 263 int 264 ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 265 { 266 if (addr->ncpaddr_family != AF_INET) 267 return 0; 268 *ip = addr->ncpaddr_ip4addr.s_addr; 269 return 1; 270 } 271 272 void 273 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 274 { 275 addr->ncpaddr_family = AF_INET; 276 addr->ncpaddr_ip4addr = ip; 277 } 278 279 int 280 ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 281 { 282 if (addr->ncpaddr_family != AF_INET) 283 return 0; 284 *ip = addr->ncpaddr_ip4addr; 285 return 1; 286 } 287 288 #ifndef NOINET6 289 void 290 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 291 { 292 addr->ncpaddr_family = AF_INET6; 293 addr->ncpaddr_ip6addr = *ip6; 294 } 295 296 int 297 ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 298 { 299 if (addr->ncpaddr_family != AF_INET6) 300 return 0; 301 *ip6 = addr->ncpaddr_ip6addr; 302 return 1; 303 } 304 #endif 305 306 void 307 ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 308 { 309 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 310 #ifndef NOINET6 311 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 312 #endif 313 314 memset(host, '\0', sizeof(*host)); 315 316 switch (addr->ncpaddr_family) { 317 case AF_INET: 318 host4->sin_family = AF_INET; 319 host4->sin_len = sizeof(*host4); 320 host4->sin_addr = addr->ncpaddr_ip4addr; 321 break; 322 323 #ifndef NOINET6 324 case AF_INET6: 325 host6->sin6_family = AF_INET6; 326 host6->sin6_len = sizeof(*host6); 327 host6->sin6_addr = addr->ncpaddr_ip6addr; 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 #ifdef NI_WITHSCOPEID 390 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 391 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 392 #else 393 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 394 NULL, 0, NI_NUMERICHOST) != 0) 395 #endif 396 break; 397 398 return res; 399 #endif 400 } 401 402 snprintf(res, sizeof res, "<AF_UNSPEC>"); 403 return res; 404 } 405 406 const char * 407 ncpaddr_ntoa(const struct ncpaddr *addr) 408 { 409 return ncpaddr_ntowa(addr); 410 } 411 412 413 int 414 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 415 { 416 struct ncprange range; 417 418 if (!ncprange_aton(&range, ncp, data)) 419 return 0; 420 421 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 422 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 423 return 0; 424 } 425 426 #ifndef NOINET6 427 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 428 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 429 return 0; 430 } 431 #endif 432 433 switch (range.ncprange_family) { 434 case AF_INET: 435 addr->ncpaddr_family = range.ncprange_family; 436 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 437 return 1; 438 439 #ifndef NOINET6 440 case AF_INET6: 441 addr->ncpaddr_family = range.ncprange_family; 442 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 443 return 1; 444 #endif 445 } 446 447 return 0; 448 } 449 450 void 451 ncprange_init(struct ncprange *range) 452 { 453 range->ncprange_family = AF_UNSPEC; 454 } 455 456 int 457 ncprange_isset(const struct ncprange *range) 458 { 459 return range->ncprange_family != AF_UNSPEC; 460 } 461 462 int 463 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 464 { 465 if (range->ncprange_family != cmp->ncprange_family) 466 return 0; 467 468 switch (range->ncprange_family) { 469 case AF_INET: 470 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 471 return 0; 472 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 473 474 #ifndef NOINET6 475 case AF_INET6: 476 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 477 return 0; 478 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 479 sizeof range->ncprange_ip6addr); 480 #endif 481 482 case AF_UNSPEC: 483 return 1; 484 } 485 486 return 0; 487 } 488 489 int 490 ncprange_isdefault(const struct ncprange *range) 491 { 492 switch (range->ncprange_family) { 493 case AF_INET: 494 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 495 return 1; 496 break; 497 498 #ifndef NOINET6 499 case AF_INET6: 500 if (range->ncprange_ip6width == 0 && 501 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 502 return 1; 503 break; 504 #endif 505 } 506 507 return 0; 508 } 509 510 void 511 ncprange_setdefault(struct ncprange *range, int af) 512 { 513 memset(range, '\0', sizeof *range); 514 range->ncprange_family = af; 515 } 516 517 int 518 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 519 { 520 #ifndef NOINET6 521 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 522 const u_char *addrp, *rangep; 523 int bits; 524 #endif 525 526 if (range->ncprange_family != addr->ncpaddr_family) 527 return 0; 528 529 switch (range->ncprange_family) { 530 case AF_INET: 531 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 532 range->ncprange_ip4mask.s_addr); 533 534 #ifndef NOINET6 535 case AF_INET6: 536 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 537 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 538 539 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 540 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 541 return 0; 542 543 return 1; 544 #endif 545 } 546 547 return 0; 548 } 549 550 int 551 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 552 { 553 switch (range->ncprange_family) { 554 case AF_INET: 555 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 556 range->ncprange_ip4mask.s_addr); 557 } 558 559 return 0; 560 } 561 562 void 563 ncprange_copy(struct ncprange *range, const struct ncprange *from) 564 { 565 switch (from->ncprange_family) { 566 case AF_INET: 567 range->ncprange_family = AF_INET; 568 range->ncprange_ip4addr = from->ncprange_ip4addr; 569 range->ncprange_ip4mask = from->ncprange_ip4mask; 570 range->ncprange_ip4width = from->ncprange_ip4width; 571 break; 572 573 #ifndef NOINET6 574 case AF_INET6: 575 range->ncprange_family = AF_INET6; 576 range->ncprange_ip6addr = from->ncprange_ip6addr; 577 range->ncprange_ip6width = from->ncprange_ip6width; 578 break; 579 #endif 580 581 default: 582 range->ncprange_family = AF_UNSPEC; 583 } 584 } 585 586 void 587 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 588 { 589 ncprange_sethost(range, addr); 590 ncprange_setwidth(range, width); 591 } 592 593 void 594 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 595 { 596 switch (from->ncpaddr_family) { 597 case AF_INET: 598 range->ncprange_family = AF_INET; 599 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 600 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 601 range->ncprange_ip4mask.s_addr = INADDR_ANY; 602 range->ncprange_ip4width = 0; 603 } else { 604 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 605 range->ncprange_ip4width = 32; 606 } 607 break; 608 609 #ifndef NOINET6 610 case AF_INET6: 611 range->ncprange_family = AF_INET6; 612 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 613 range->ncprange_ip6width = 128; 614 break; 615 #endif 616 617 default: 618 range->ncprange_family = AF_UNSPEC; 619 } 620 } 621 622 int 623 ncprange_ishost(const struct ncprange *range) 624 { 625 switch (range->ncprange_family) { 626 case AF_INET: 627 return range->ncprange_ip4width == 32; 628 #ifndef NOINET6 629 case AF_INET6: 630 return range->ncprange_ip6width == 128; 631 #endif 632 } 633 634 return (0); 635 } 636 637 int 638 ncprange_setwidth(struct ncprange *range, int width) 639 { 640 switch (range->ncprange_family) { 641 case AF_INET: 642 if (width < 0 || width > 32) 643 break; 644 range->ncprange_ip4width = width; 645 range->ncprange_ip4mask = bits2mask4(width); 646 break; 647 648 #ifndef NOINET6 649 case AF_INET6: 650 if (width < 0 || width > 128) 651 break; 652 range->ncprange_ip6width = width; 653 break; 654 #endif 655 656 case AF_UNSPEC: 657 return 1; 658 } 659 660 return 0; 661 } 662 663 void 664 ncprange_setip4host(struct ncprange *range, struct in_addr from) 665 { 666 range->ncprange_family = AF_INET; 667 range->ncprange_ip4addr = from; 668 if (from.s_addr == INADDR_ANY) { 669 range->ncprange_ip4mask.s_addr = INADDR_ANY; 670 range->ncprange_ip4width = 0; 671 } else { 672 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 673 range->ncprange_ip4width = 32; 674 } 675 } 676 677 void 678 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 679 { 680 range->ncprange_family = AF_INET; 681 range->ncprange_ip4addr = from; 682 range->ncprange_ip4mask = msk; 683 range->ncprange_ip4width = mask42bits(msk); 684 } 685 686 687 int 688 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 689 { 690 if (range->ncprange_family != AF_INET) 691 return 0; 692 range->ncprange_ip4mask = mask; 693 range->ncprange_ip4width = mask42bits(mask); 694 return 1; 695 } 696 697 void 698 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 699 const struct sockaddr *mask) 700 { 701 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 702 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 703 #ifndef NOINET6 704 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 705 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 706 #endif 707 708 switch (host->sa_family) { 709 case AF_INET: 710 range->ncprange_family = AF_INET; 711 range->ncprange_ip4addr = host4->sin_addr; 712 if (host4->sin_addr.s_addr == INADDR_ANY) { 713 range->ncprange_ip4mask.s_addr = INADDR_ANY; 714 range->ncprange_ip4width = 0; 715 } else if (mask4 && mask4->sin_family == AF_INET) { 716 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 717 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 718 } else { 719 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 720 range->ncprange_ip4width = 32; 721 } 722 break; 723 724 #ifndef NOINET6 725 case AF_INET6: 726 range->ncprange_family = AF_INET6; 727 range->ncprange_ip6addr = host6->sin6_addr; 728 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 729 break; 730 #endif 731 732 default: 733 range->ncprange_family = AF_UNSPEC; 734 } 735 } 736 737 void 738 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 739 struct sockaddr_storage *mask) 740 { 741 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 742 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 743 #ifndef NOINET6 744 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 745 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 746 #endif 747 748 memset(host, '\0', sizeof(*host)); 749 if (mask) 750 memset(mask, '\0', sizeof(*mask)); 751 752 switch (range->ncprange_family) { 753 case AF_INET: 754 host4->sin_family = AF_INET; 755 host4->sin_len = sizeof(*host4); 756 host4->sin_addr = range->ncprange_ip4addr; 757 if (mask4) { 758 mask4->sin_family = AF_INET; 759 mask4->sin_len = sizeof(*host4); 760 mask4->sin_addr = range->ncprange_ip4mask; 761 } 762 break; 763 764 #ifndef NOINET6 765 case AF_INET6: 766 host6->sin6_family = AF_INET6; 767 host6->sin6_len = sizeof(*host6); 768 host6->sin6_addr = range->ncprange_ip6addr; 769 if (mask6) { 770 mask6->sin6_family = AF_INET6; 771 mask6->sin6_len = sizeof(*host6); 772 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 773 } 774 break; 775 #endif 776 777 default: 778 host->ss_family = AF_UNSPEC; 779 if (mask) 780 mask->ss_family = AF_UNSPEC; 781 break; 782 } 783 } 784 785 int 786 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 787 { 788 switch (range->ncprange_family) { 789 case AF_INET: 790 addr->ncpaddr_family = AF_INET; 791 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 792 return 1; 793 #ifndef NOINET6 794 case AF_INET6: 795 addr->ncpaddr_family = AF_INET6; 796 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 797 return 1; 798 #endif 799 } 800 801 return 0; 802 } 803 804 int 805 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 806 { 807 if (range->ncprange_family != AF_INET) 808 return 0; 809 810 *addr = range->ncprange_ip4addr; 811 return 1; 812 } 813 814 int 815 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 816 { 817 switch (range->ncprange_family) { 818 case AF_INET: 819 *mask = range->ncprange_ip4mask; 820 return 1; 821 } 822 823 return 0; 824 } 825 826 int 827 ncprange_getwidth(const struct ncprange *range, int *width) 828 { 829 switch (range->ncprange_family) { 830 case AF_INET: 831 *width = range->ncprange_ip4width; 832 return 1; 833 #ifndef NOINET6 834 case AF_INET6: 835 *width = range->ncprange_ip6width; 836 return 1; 837 #endif 838 } 839 840 return 0; 841 } 842 843 const char * 844 ncprange_ntoa(const struct ncprange *range) 845 { 846 char *res; 847 struct ncpaddr addr; 848 int len; 849 850 if (!ncprange_getaddr(range, &addr)) 851 return "<AF_UNSPEC>"; 852 853 res = ncpaddr_ntowa(&addr); 854 len = strlen(res); 855 if (len >= NCP_ASCIIBUFFERSIZE - 1) 856 return res; 857 858 switch (range->ncprange_family) { 859 case AF_INET: 860 if (range->ncprange_ip4width == -1) { 861 /* A non-contiguous mask */ 862 for (; len >= 3; res[len -= 2] = '\0') 863 if (strcmp(res + len - 2, ".0")) 864 break; 865 snprintf(res + len, sizeof res - len, "&0x%08lx", 866 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 867 } else if (range->ncprange_ip4width < 32) 868 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 869 870 return res; 871 872 #ifndef NOINET6 873 case AF_INET6: 874 if (range->ncprange_ip6width != 128) 875 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 876 877 return res; 878 #endif 879 } 880 881 return "<AF_UNSPEC>"; 882 } 883 884 #ifndef NOINET6 885 int 886 ncprange_scopeid(const struct ncprange *range) 887 { 888 const struct in6_addr *sin6; 889 int scopeid = -1; 890 891 if (range->ncprange_family == AF_INET6) { 892 sin6 = &range->ncprange_ip6addr; 893 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 894 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 895 scopeid = -1; 896 } 897 898 return scopeid; 899 } 900 #endif 901 902 int 903 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 904 { 905 int bits, len; 906 char *wp; 907 const char *cp; 908 char *s; 909 910 len = strcspn(data, "/"); 911 912 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 913 range->ncprange_family = AF_INET; 914 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 915 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 916 range->ncprange_ip4width = 32; 917 return 1; 918 #ifndef NOINET6 919 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 920 range->ncprange_family = AF_INET6; 921 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 922 range->ncprange_ip6width = 128; 923 return 1; 924 #endif 925 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 926 range->ncprange_family = AF_INET; 927 range->ncprange_ip4addr = ncp->ipcp.my_ip; 928 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 929 range->ncprange_ip4width = 32; 930 return 1; 931 #ifndef NOINET6 932 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 933 range->ncprange_family = AF_INET6; 934 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 935 range->ncprange_ip6width = 128; 936 return 1; 937 #endif 938 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 939 range->ncprange_family = AF_INET; 940 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 941 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 942 range->ncprange_ip4width = 32; 943 return 1; 944 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 945 range->ncprange_family = AF_INET; 946 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 947 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 948 range->ncprange_ip4width = 32; 949 return 1; 950 } 951 952 s = (char *)alloca(len + 1); 953 strncpy(s, data, len); 954 s[len] = '\0'; 955 bits = -1; 956 957 if (data[len] != '\0') { 958 bits = strtol(data + len + 1, &wp, 0); 959 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 960 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 961 return 0; 962 } 963 } 964 965 if ((cp = strchr(data, ':')) == NULL) { 966 range->ncprange_family = AF_INET; 967 968 range->ncprange_ip4addr = GetIpAddr(s); 969 970 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 971 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 972 return 0; 973 } 974 975 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 976 range->ncprange_ip4mask.s_addr = INADDR_ANY; 977 range->ncprange_ip4width = 0; 978 } else if (bits == -1) { 979 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 980 range->ncprange_ip4width = 32; 981 } else if (bits > 32) { 982 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 983 return 0; 984 } else { 985 range->ncprange_ip4mask = bits2mask4(bits); 986 range->ncprange_ip4width = bits; 987 } 988 989 return 1; 990 #ifndef NOINET6 991 } else if (strchr(cp + 1, ':') != NULL) { 992 range->ncprange_family = AF_INET6; 993 994 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 995 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 996 return 0; 997 } 998 999 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1000 range->ncprange_ip6width = 0; 1001 else 1002 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1003 return 1; 1004 #endif 1005 } 1006 1007 return 0; 1008 } 1009