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, m; 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, m = 0; c < masks + sizeof masks; c++, m++) 153 if (*c == *p) { 154 masklen += m; 155 break; 156 } 157 } 158 159 return masklen; 160 } 161 162 #if 0 163 static void 164 adjust_linklocal(struct sockaddr_in6 *sin6) 165 { 166 /* XXX: ?????!?!?!!!!! This is horrible ! */ 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 } 179 #endif 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 #if 0 389 adjust_linklocal(&sin6); 390 #endif 391 #ifdef NI_WITHSCOPEID 392 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 393 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 394 #else 395 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 396 NULL, 0, NI_NUMERICHOST) != 0) 397 #endif 398 break; 399 400 return res; 401 #endif 402 } 403 404 snprintf(res, sizeof res, "<AF_UNSPEC>"); 405 return res; 406 } 407 408 const char * 409 ncpaddr_ntoa(const struct ncpaddr *addr) 410 { 411 return ncpaddr_ntowa(addr); 412 } 413 414 415 int 416 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 417 { 418 struct ncprange range; 419 420 if (!ncprange_aton(&range, ncp, data)) 421 return 0; 422 423 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32 && 424 range.ncprange_ip4addr.s_addr != INADDR_ANY) { 425 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 426 return 0; 427 } 428 429 #ifndef NOINET6 430 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128 && 431 !IN6_IS_ADDR_UNSPECIFIED(&range.ncprange_ip6addr)) { 432 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 433 return 0; 434 } 435 #endif 436 437 switch (range.ncprange_family) { 438 case AF_INET: 439 addr->ncpaddr_family = range.ncprange_family; 440 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 441 return 1; 442 443 #ifndef NOINET6 444 case AF_INET6: 445 addr->ncpaddr_family = range.ncprange_family; 446 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 447 return 1; 448 #endif 449 } 450 451 return 0; 452 } 453 454 void 455 ncprange_init(struct ncprange *range) 456 { 457 range->ncprange_family = AF_UNSPEC; 458 } 459 460 int 461 ncprange_isset(const struct ncprange *range) 462 { 463 return range->ncprange_family != AF_UNSPEC; 464 } 465 466 int 467 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 468 { 469 if (range->ncprange_family != cmp->ncprange_family) 470 return 0; 471 472 switch (range->ncprange_family) { 473 case AF_INET: 474 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 475 return 0; 476 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 477 478 #ifndef NOINET6 479 case AF_INET6: 480 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 481 return 0; 482 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 483 sizeof range->ncprange_ip6addr); 484 #endif 485 486 case AF_UNSPEC: 487 return 1; 488 } 489 490 return 0; 491 } 492 493 int 494 ncprange_isdefault(const struct ncprange *range) 495 { 496 switch (range->ncprange_family) { 497 case AF_INET: 498 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 499 return 1; 500 break; 501 502 #ifndef NOINET6 503 case AF_INET6: 504 if (range->ncprange_ip6width == 0 && 505 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 506 return 1; 507 break; 508 #endif 509 } 510 511 return 0; 512 } 513 514 void 515 ncprange_setdefault(struct ncprange *range, int af) 516 { 517 memset(range, '\0', sizeof *range); 518 range->ncprange_family = af; 519 } 520 521 int 522 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 523 { 524 #ifndef NOINET6 525 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 526 const u_char *addrp, *rangep; 527 int bits; 528 #endif 529 530 if (range->ncprange_family != addr->ncpaddr_family) 531 return 0; 532 533 switch (range->ncprange_family) { 534 case AF_INET: 535 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 536 range->ncprange_ip4mask.s_addr); 537 538 #ifndef NOINET6 539 case AF_INET6: 540 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 541 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 542 543 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 544 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 545 return 0; 546 547 return 1; 548 #endif 549 } 550 551 return 0; 552 } 553 554 int 555 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 556 { 557 switch (range->ncprange_family) { 558 case AF_INET: 559 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 560 range->ncprange_ip4mask.s_addr); 561 } 562 563 return 0; 564 } 565 566 void 567 ncprange_copy(struct ncprange *range, const struct ncprange *from) 568 { 569 switch (from->ncprange_family) { 570 case AF_INET: 571 range->ncprange_family = AF_INET; 572 range->ncprange_ip4addr = from->ncprange_ip4addr; 573 range->ncprange_ip4mask = from->ncprange_ip4mask; 574 range->ncprange_ip4width = from->ncprange_ip4width; 575 break; 576 577 #ifndef NOINET6 578 case AF_INET6: 579 range->ncprange_family = AF_INET6; 580 range->ncprange_ip6addr = from->ncprange_ip6addr; 581 range->ncprange_ip6width = from->ncprange_ip6width; 582 break; 583 #endif 584 585 default: 586 range->ncprange_family = AF_UNSPEC; 587 } 588 } 589 590 void 591 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 592 { 593 ncprange_sethost(range, addr); 594 ncprange_setwidth(range, width); 595 } 596 597 void 598 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 599 { 600 switch (from->ncpaddr_family) { 601 case AF_INET: 602 range->ncprange_family = AF_INET; 603 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 604 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 605 range->ncprange_ip4mask.s_addr = INADDR_ANY; 606 range->ncprange_ip4width = 0; 607 } else { 608 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 609 range->ncprange_ip4width = 32; 610 } 611 break; 612 613 #ifndef NOINET6 614 case AF_INET6: 615 range->ncprange_family = AF_INET6; 616 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 617 range->ncprange_ip6width = 128; 618 break; 619 #endif 620 621 default: 622 range->ncprange_family = AF_UNSPEC; 623 } 624 } 625 626 int 627 ncprange_ishost(const struct ncprange *range) 628 { 629 switch (range->ncprange_family) { 630 case AF_INET: 631 return range->ncprange_ip4width == 32; 632 #ifndef NOINET6 633 case AF_INET6: 634 return range->ncprange_ip6width == 128; 635 #endif 636 } 637 638 return (0); 639 } 640 641 int 642 ncprange_setwidth(struct ncprange *range, int width) 643 { 644 switch (range->ncprange_family) { 645 case AF_INET: 646 if (width < 0 || width > 32) 647 break; 648 range->ncprange_ip4width = width; 649 range->ncprange_ip4mask = bits2mask4(width); 650 break; 651 652 #ifndef NOINET6 653 case AF_INET6: 654 if (width < 0 || width > 128) 655 break; 656 range->ncprange_ip6width = width; 657 break; 658 #endif 659 660 case AF_UNSPEC: 661 return 1; 662 } 663 664 return 0; 665 } 666 667 void 668 ncprange_setip4host(struct ncprange *range, struct in_addr from) 669 { 670 range->ncprange_family = AF_INET; 671 range->ncprange_ip4addr = from; 672 if (from.s_addr == INADDR_ANY) { 673 range->ncprange_ip4mask.s_addr = INADDR_ANY; 674 range->ncprange_ip4width = 0; 675 } else { 676 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 677 range->ncprange_ip4width = 32; 678 } 679 } 680 681 void 682 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 683 { 684 range->ncprange_family = AF_INET; 685 range->ncprange_ip4addr = from; 686 range->ncprange_ip4mask = msk; 687 range->ncprange_ip4width = mask42bits(msk); 688 } 689 690 691 int 692 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 693 { 694 if (range->ncprange_family != AF_INET) 695 return 0; 696 range->ncprange_ip4mask = mask; 697 range->ncprange_ip4width = mask42bits(mask); 698 return 1; 699 } 700 701 void 702 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 703 const struct sockaddr *mask) 704 { 705 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 706 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 707 #ifndef NOINET6 708 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 709 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 710 #endif 711 712 switch (host->sa_family) { 713 case AF_INET: 714 range->ncprange_family = AF_INET; 715 range->ncprange_ip4addr = host4->sin_addr; 716 if (host4->sin_addr.s_addr == INADDR_ANY) { 717 range->ncprange_ip4mask.s_addr = INADDR_ANY; 718 range->ncprange_ip4width = 0; 719 } else if (mask4 && mask4->sin_family == AF_INET) { 720 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 721 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 722 } else { 723 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 724 range->ncprange_ip4width = 32; 725 } 726 break; 727 728 #ifndef NOINET6 729 case AF_INET6: 730 range->ncprange_family = AF_INET6; 731 range->ncprange_ip6addr = host6->sin6_addr; 732 if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) 733 range->ncprange_ip6width = 0; 734 else 735 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 736 break; 737 #endif 738 739 default: 740 range->ncprange_family = AF_UNSPEC; 741 } 742 } 743 744 void 745 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 746 struct sockaddr_storage *mask) 747 { 748 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 749 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 750 #ifndef NOINET6 751 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 752 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 753 #endif 754 755 memset(host, '\0', sizeof(*host)); 756 if (mask) 757 memset(mask, '\0', sizeof(*mask)); 758 759 switch (range->ncprange_family) { 760 case AF_INET: 761 host4->sin_family = AF_INET; 762 host4->sin_len = sizeof(*host4); 763 host4->sin_addr = range->ncprange_ip4addr; 764 if (mask4) { 765 mask4->sin_family = AF_INET; 766 mask4->sin_len = sizeof(*host4); 767 mask4->sin_addr = range->ncprange_ip4mask; 768 } 769 break; 770 771 #ifndef NOINET6 772 case AF_INET6: 773 host6->sin6_family = AF_INET6; 774 host6->sin6_len = sizeof(*host6); 775 host6->sin6_addr = range->ncprange_ip6addr; 776 if (mask6) { 777 mask6->sin6_family = AF_INET6; 778 mask6->sin6_len = sizeof(*host6); 779 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 780 } 781 break; 782 #endif 783 784 default: 785 host->ss_family = AF_UNSPEC; 786 if (mask) 787 mask->ss_family = AF_UNSPEC; 788 break; 789 } 790 } 791 792 int 793 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 794 { 795 switch (range->ncprange_family) { 796 case AF_INET: 797 addr->ncpaddr_family = AF_INET; 798 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 799 return 1; 800 #ifndef NOINET6 801 case AF_INET6: 802 addr->ncpaddr_family = AF_INET6; 803 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 804 return 1; 805 #endif 806 } 807 808 return 0; 809 } 810 811 int 812 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 813 { 814 if (range->ncprange_family != AF_INET) 815 return 0; 816 817 *addr = range->ncprange_ip4addr; 818 return 1; 819 } 820 821 int 822 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 823 { 824 switch (range->ncprange_family) { 825 case AF_INET: 826 *mask = range->ncprange_ip4mask; 827 return 1; 828 } 829 830 return 0; 831 } 832 833 int 834 ncprange_getwidth(const struct ncprange *range, int *width) 835 { 836 switch (range->ncprange_family) { 837 case AF_INET: 838 *width = range->ncprange_ip4width; 839 return 1; 840 #ifndef NOINET6 841 case AF_INET6: 842 *width = range->ncprange_ip6width; 843 return 1; 844 #endif 845 } 846 847 return 0; 848 } 849 850 const char * 851 ncprange_ntoa(const struct ncprange *range) 852 { 853 char *res; 854 struct ncpaddr addr; 855 int len; 856 857 if (!ncprange_getaddr(range, &addr)) 858 return "<AF_UNSPEC>"; 859 860 res = ncpaddr_ntowa(&addr); 861 len = strlen(res); 862 if (len >= NCP_ASCIIBUFFERSIZE - 1) 863 return res; 864 865 switch (range->ncprange_family) { 866 case AF_INET: 867 if (range->ncprange_ip4width == -1) { 868 /* A non-contiguous mask */ 869 for (; len >= 3; res[len -= 2] = '\0') 870 if (strcmp(res + len - 2, ".0")) 871 break; 872 snprintf(res + len, sizeof res - len, "&0x%08lx", 873 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 874 } else if (range->ncprange_ip4width < 32) 875 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 876 877 return res; 878 879 #ifndef NOINET6 880 case AF_INET6: 881 if (range->ncprange_ip6width != 128) 882 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 883 884 return res; 885 #endif 886 } 887 888 return "<AF_UNSPEC>"; 889 } 890 891 #ifndef NOINET6 892 int 893 ncprange_scopeid(const struct ncprange *range) 894 { 895 const struct in6_addr *sin6; 896 int scopeid = -1; 897 898 if (range->ncprange_family == AF_INET6) { 899 sin6 = &range->ncprange_ip6addr; 900 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 901 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 902 scopeid = -1; 903 } 904 905 return scopeid; 906 } 907 #endif 908 909 int 910 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 911 { 912 int bits, len; 913 char *wp; 914 const char *cp; 915 char *s; 916 917 len = strcspn(data, "/"); 918 919 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 920 range->ncprange_family = AF_INET; 921 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 922 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 923 range->ncprange_ip4width = 32; 924 return 1; 925 #ifndef NOINET6 926 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 927 range->ncprange_family = AF_INET6; 928 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 929 range->ncprange_ip6width = 128; 930 return 1; 931 #endif 932 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 933 range->ncprange_family = AF_INET; 934 range->ncprange_ip4addr = ncp->ipcp.my_ip; 935 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 936 range->ncprange_ip4width = 32; 937 return 1; 938 #ifndef NOINET6 939 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 940 range->ncprange_family = AF_INET6; 941 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 942 range->ncprange_ip6width = 128; 943 return 1; 944 #endif 945 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 946 range->ncprange_family = AF_INET; 947 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 948 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 949 range->ncprange_ip4width = 32; 950 return 1; 951 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 952 range->ncprange_family = AF_INET; 953 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 954 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 955 range->ncprange_ip4width = 32; 956 return 1; 957 } 958 959 s = (char *)alloca(len + 1); 960 strncpy(s, data, len); 961 s[len] = '\0'; 962 bits = -1; 963 964 if (data[len] != '\0') { 965 bits = strtol(data + len + 1, &wp, 0); 966 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 967 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 968 return 0; 969 } 970 } 971 972 if ((cp = strchr(data, ':')) == NULL) { 973 range->ncprange_family = AF_INET; 974 975 range->ncprange_ip4addr = GetIpAddr(s); 976 977 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 978 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 979 return 0; 980 } 981 982 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 983 range->ncprange_ip4mask.s_addr = INADDR_ANY; 984 range->ncprange_ip4width = 0; 985 } else if (bits == -1) { 986 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 987 range->ncprange_ip4width = 32; 988 } else if (bits > 32) { 989 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 990 return 0; 991 } else { 992 range->ncprange_ip4mask = bits2mask4(bits); 993 range->ncprange_ip4width = bits; 994 } 995 996 return 1; 997 #ifndef NOINET6 998 } else if (strchr(cp + 1, ':') != NULL) { 999 range->ncprange_family = AF_INET6; 1000 1001 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 1002 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 1003 return 0; 1004 } 1005 1006 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1007 range->ncprange_ip6width = 0; 1008 else 1009 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1010 return 1; 1011 #endif 1012 } 1013 1014 return 0; 1015 } 1016