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: src/usr.sbin/ppp/ncpaddr.c,v 1.10.2.3 2003/04/29 16:05:55 ume Exp $ 27 * $DragonFly: src/usr.sbin/ppp/ncpaddr.c,v 1.3 2006/01/17 23:49:16 dillon Exp $ 28 */ 29 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #ifdef __OpenBSD__ 33 #include <net/if_types.h> 34 #include <net/route.h> 35 #endif 36 #include <netinet/in.h> 37 #include <netinet/in_systm.h> 38 #include <netinet/ip.h> 39 #include <arpa/inet.h> 40 #include <sys/un.h> 41 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <termios.h> 47 48 #include "log.h" 49 #include "ncpaddr.h" 50 #include "timer.h" 51 #include "fsm.h" 52 #include "defs.h" 53 #include "slcompress.h" 54 #include "iplist.h" 55 #include "throughput.h" 56 #include "mbuf.h" 57 #include "ipcp.h" 58 #include "descriptor.h" 59 #include "layer.h" 60 #include "lqr.h" 61 #include "hdlc.h" 62 #include "lcp.h" 63 #include "ccp.h" 64 #include "link.h" 65 #include "mp.h" 66 #include "ipv6cp.h" 67 #include "ncp.h" 68 69 70 #define ncprange_ip4addr u.ip4.ipaddr 71 #define ncprange_ip4mask u.ip4.mask 72 #define ncprange_ip4width u.ip4.width 73 #define ncpaddr_ip4addr u.ip4addr 74 #ifndef NOINET6 75 #define ncprange_ip6addr u.ip6.ipaddr 76 #define ncprange_ip6width u.ip6.width 77 #define ncpaddr_ip6addr u.ip6addr 78 #endif 79 80 #define NCP_ASCIIBUFFERSIZE 52 81 82 static struct in_addr 83 bits2mask4(int bits) 84 { 85 struct in_addr result; 86 u_int32_t bit = 0x80000000; 87 88 result.s_addr = 0; 89 90 while (bits) { 91 result.s_addr |= bit; 92 bit >>= 1; 93 bits--; 94 } 95 96 result.s_addr = htonl(result.s_addr); 97 return result; 98 } 99 100 static int 101 mask42bits(struct in_addr mask) 102 { 103 u_int32_t msk = ntohl(mask.s_addr); 104 u_int32_t tst; 105 int ret; 106 107 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 108 if (msk & tst) 109 break; 110 111 for (tst <<= 1; tst; tst <<= 1) 112 if (!(msk & tst)) 113 break; 114 115 return tst ? -1 : ret; 116 } 117 118 #ifndef NOINET6 119 static struct in6_addr 120 bits2mask6(int bits) 121 { 122 struct in6_addr result; 123 u_int32_t bit = 0x80; 124 u_char *c = result.s6_addr; 125 126 memset(&result, '\0', sizeof result); 127 128 while (bits) { 129 if (bit == 0) { 130 bit = 0x80; 131 c++; 132 } 133 *c |= bit; 134 bit >>= 1; 135 bits--; 136 } 137 138 return result; 139 } 140 141 static int 142 mask62bits(const struct in6_addr *mask) 143 { 144 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 145 const u_char *c, *p, *end; 146 int masklen; 147 148 p = (const u_char *)mask; 149 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 150 masklen += 8; 151 152 if (p < end) { 153 for (c = masks; c < masks + sizeof masks; c++) 154 if (*c == *p) { 155 masklen += c - masks; 156 break; 157 } 158 } 159 160 return masklen; 161 } 162 163 static void 164 adjust_linklocal(struct sockaddr_in6 *sin6) 165 { 166 /* XXX: ?????!?!?!!!!! This is horrible ! */ 167 #if 0 168 /* 169 * The kernel does not understand sin6_scope_id for routing at this moment. 170 * We should rather keep the embedded ID. 171 * jinmei@kame.net, 20011026 172 */ 173 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 174 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 175 sin6->sin6_scope_id = 176 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 177 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 178 } 179 #endif 180 } 181 #endif 182 183 void 184 ncpaddr_init(struct ncpaddr *addr) 185 { 186 addr->ncpaddr_family = AF_UNSPEC; 187 } 188 189 int 190 ncpaddr_isset(const struct ncpaddr *addr) 191 { 192 return addr->ncpaddr_family != AF_UNSPEC; 193 } 194 195 int 196 ncpaddr_isdefault(const struct ncpaddr *addr) 197 { 198 switch (addr->ncpaddr_family) { 199 case AF_INET: 200 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 201 return 1; 202 break; 203 204 #ifndef NOINET6 205 case AF_INET6: 206 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 207 return 1; 208 break; 209 #endif 210 } 211 212 return 0; 213 } 214 215 int 216 ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 217 { 218 if (addr->ncpaddr_family != cmp->ncpaddr_family) 219 return 0; 220 221 switch (addr->ncpaddr_family) { 222 case AF_INET: 223 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 224 225 #ifndef NOINET6 226 case AF_INET6: 227 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 228 sizeof addr->ncpaddr_ip6addr); 229 #endif 230 231 case AF_UNSPEC: 232 return 1; 233 } 234 235 return 0; 236 } 237 238 void 239 ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 240 { 241 switch (from->ncpaddr_family) { 242 case AF_INET: 243 addr->ncpaddr_family = AF_INET; 244 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 245 break; 246 #ifndef NOINET6 247 case AF_INET6: 248 addr->ncpaddr_family = AF_INET6; 249 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 250 break; 251 #endif 252 default: 253 addr->ncpaddr_family = AF_UNSPEC; 254 } 255 } 256 257 void 258 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 259 { 260 addr->ncpaddr_family = AF_INET; 261 addr->ncpaddr_ip4addr.s_addr = ip; 262 } 263 264 int 265 ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 266 { 267 if (addr->ncpaddr_family != AF_INET) 268 return 0; 269 *ip = addr->ncpaddr_ip4addr.s_addr; 270 return 1; 271 } 272 273 void 274 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 275 { 276 addr->ncpaddr_family = AF_INET; 277 addr->ncpaddr_ip4addr = ip; 278 } 279 280 int 281 ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 282 { 283 if (addr->ncpaddr_family != AF_INET) 284 return 0; 285 *ip = addr->ncpaddr_ip4addr; 286 return 1; 287 } 288 289 #ifndef NOINET6 290 void 291 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 292 { 293 addr->ncpaddr_family = AF_INET6; 294 addr->ncpaddr_ip6addr = *ip6; 295 } 296 297 int 298 ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 299 { 300 if (addr->ncpaddr_family != AF_INET6) 301 return 0; 302 *ip6 = addr->ncpaddr_ip6addr; 303 return 1; 304 } 305 #endif 306 307 void 308 ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 309 { 310 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 311 #ifndef NOINET6 312 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 313 #endif 314 315 memset(host, '\0', sizeof(*host)); 316 317 switch (addr->ncpaddr_family) { 318 case AF_INET: 319 host4->sin_family = AF_INET; 320 host4->sin_len = sizeof(*host4); 321 host4->sin_addr = addr->ncpaddr_ip4addr; 322 break; 323 324 #ifndef NOINET6 325 case AF_INET6: 326 host6->sin6_family = AF_INET6; 327 host6->sin6_len = sizeof(*host6); 328 host6->sin6_addr = addr->ncpaddr_ip6addr; 329 break; 330 #endif 331 332 default: 333 host->ss_family = AF_UNSPEC; 334 break; 335 } 336 } 337 338 void 339 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 340 { 341 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 342 #ifndef NOINET6 343 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 344 #endif 345 346 switch (host->sa_family) { 347 case AF_INET: 348 addr->ncpaddr_family = AF_INET; 349 addr->ncpaddr_ip4addr = host4->sin_addr; 350 break; 351 352 #ifndef NOINET6 353 case AF_INET6: 354 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 355 addr->ncpaddr_family = AF_INET; 356 addr->ncpaddr_ip4addr.s_addr = 357 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 358 } else { 359 addr->ncpaddr_family = AF_INET6; 360 addr->ncpaddr_ip6addr = host6->sin6_addr; 361 } 362 break; 363 #endif 364 365 default: 366 addr->ncpaddr_family = AF_UNSPEC; 367 } 368 } 369 370 static char * 371 ncpaddr_ntowa(const struct ncpaddr *addr) 372 { 373 static char res[NCP_ASCIIBUFFERSIZE]; 374 #ifndef NOINET6 375 struct sockaddr_in6 sin6; 376 #endif 377 378 switch (addr->ncpaddr_family) { 379 case AF_INET: 380 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 381 return res; 382 383 #ifndef NOINET6 384 case AF_INET6: 385 memset(&sin6, '\0', sizeof(sin6)); 386 sin6.sin6_len = sizeof(sin6); 387 sin6.sin6_family = AF_INET6; 388 sin6.sin6_addr = addr->ncpaddr_ip6addr; 389 adjust_linklocal(&sin6); 390 #ifdef NI_WITHSCOPEID 391 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 392 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 393 #else 394 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 395 NULL, 0, NI_NUMERICHOST) != 0) 396 #endif 397 break; 398 399 return res; 400 #endif 401 } 402 403 snprintf(res, sizeof res, "<AF_UNSPEC>"); 404 return res; 405 } 406 407 const char * 408 ncpaddr_ntoa(const struct ncpaddr *addr) 409 { 410 return ncpaddr_ntowa(addr); 411 } 412 413 414 int 415 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 416 { 417 struct ncprange range; 418 419 if (!ncprange_aton(&range, ncp, data)) 420 return 0; 421 422 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 423 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 424 return 0; 425 } 426 427 #ifndef NOINET6 428 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 429 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 430 return 0; 431 } 432 #endif 433 434 switch (range.ncprange_family) { 435 case AF_INET: 436 addr->ncpaddr_family = range.ncprange_family; 437 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 438 return 1; 439 440 #ifndef NOINET6 441 case AF_INET6: 442 addr->ncpaddr_family = range.ncprange_family; 443 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 444 return 1; 445 #endif 446 } 447 448 return 0; 449 } 450 451 void 452 ncprange_init(struct ncprange *range) 453 { 454 range->ncprange_family = AF_UNSPEC; 455 } 456 457 int 458 ncprange_isset(const struct ncprange *range) 459 { 460 return range->ncprange_family != AF_UNSPEC; 461 } 462 463 int 464 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 465 { 466 if (range->ncprange_family != cmp->ncprange_family) 467 return 0; 468 469 switch (range->ncprange_family) { 470 case AF_INET: 471 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 472 return 0; 473 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 474 475 #ifndef NOINET6 476 case AF_INET6: 477 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 478 return 0; 479 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 480 sizeof range->ncprange_ip6addr); 481 #endif 482 483 case AF_UNSPEC: 484 return 1; 485 } 486 487 return 0; 488 } 489 490 int 491 ncprange_isdefault(const struct ncprange *range) 492 { 493 switch (range->ncprange_family) { 494 case AF_INET: 495 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 496 return 1; 497 break; 498 499 #ifndef NOINET6 500 case AF_INET6: 501 if (range->ncprange_ip6width == 0 && 502 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 503 return 1; 504 break; 505 #endif 506 } 507 508 return 0; 509 } 510 511 void 512 ncprange_setdefault(struct ncprange *range, int af) 513 { 514 memset(range, '\0', sizeof *range); 515 range->ncprange_family = af; 516 } 517 518 int 519 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 520 { 521 #ifndef NOINET6 522 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 523 const u_char *addrp, *rangep; 524 int bits; 525 #endif 526 527 if (range->ncprange_family != addr->ncpaddr_family) 528 return 0; 529 530 switch (range->ncprange_family) { 531 case AF_INET: 532 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 533 range->ncprange_ip4mask.s_addr); 534 535 #ifndef NOINET6 536 case AF_INET6: 537 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 538 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 539 540 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 541 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 542 return 0; 543 544 return 1; 545 #endif 546 } 547 548 return 0; 549 } 550 551 int 552 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 553 { 554 switch (range->ncprange_family) { 555 case AF_INET: 556 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 557 range->ncprange_ip4mask.s_addr); 558 } 559 560 return 0; 561 } 562 563 void 564 ncprange_copy(struct ncprange *range, const struct ncprange *from) 565 { 566 switch (from->ncprange_family) { 567 case AF_INET: 568 range->ncprange_family = AF_INET; 569 range->ncprange_ip4addr = from->ncprange_ip4addr; 570 range->ncprange_ip4mask = from->ncprange_ip4mask; 571 range->ncprange_ip4width = from->ncprange_ip4width; 572 break; 573 574 #ifndef NOINET6 575 case AF_INET6: 576 range->ncprange_family = AF_INET6; 577 range->ncprange_ip6addr = from->ncprange_ip6addr; 578 range->ncprange_ip6width = from->ncprange_ip6width; 579 break; 580 #endif 581 582 default: 583 range->ncprange_family = AF_UNSPEC; 584 } 585 } 586 587 void 588 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 589 { 590 ncprange_sethost(range, addr); 591 ncprange_setwidth(range, width); 592 } 593 594 void 595 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 596 { 597 switch (from->ncpaddr_family) { 598 case AF_INET: 599 range->ncprange_family = AF_INET; 600 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 601 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 602 range->ncprange_ip4mask.s_addr = INADDR_ANY; 603 range->ncprange_ip4width = 0; 604 } else { 605 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 606 range->ncprange_ip4width = 32; 607 } 608 break; 609 610 #ifndef NOINET6 611 case AF_INET6: 612 range->ncprange_family = AF_INET6; 613 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 614 range->ncprange_ip6width = 128; 615 break; 616 #endif 617 618 default: 619 range->ncprange_family = AF_UNSPEC; 620 } 621 } 622 623 int 624 ncprange_ishost(const struct ncprange *range) 625 { 626 switch (range->ncprange_family) { 627 case AF_INET: 628 return range->ncprange_ip4width == 32; 629 #ifndef NOINET6 630 case AF_INET6: 631 return range->ncprange_ip6width == 128; 632 #endif 633 } 634 635 return (0); 636 } 637 638 int 639 ncprange_setwidth(struct ncprange *range, int width) 640 { 641 switch (range->ncprange_family) { 642 case AF_INET: 643 if (width < 0 || width > 32) 644 break; 645 range->ncprange_ip4width = width; 646 range->ncprange_ip4mask = bits2mask4(width); 647 break; 648 649 #ifndef NOINET6 650 case AF_INET6: 651 if (width < 0 || width > 128) 652 break; 653 range->ncprange_ip6width = width; 654 break; 655 #endif 656 657 case AF_UNSPEC: 658 return 1; 659 } 660 661 return 0; 662 } 663 664 void 665 ncprange_setip4host(struct ncprange *range, struct in_addr from) 666 { 667 range->ncprange_family = AF_INET; 668 range->ncprange_ip4addr = from; 669 if (from.s_addr == INADDR_ANY) { 670 range->ncprange_ip4mask.s_addr = INADDR_ANY; 671 range->ncprange_ip4width = 0; 672 } else { 673 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 674 range->ncprange_ip4width = 32; 675 } 676 } 677 678 void 679 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 680 { 681 range->ncprange_family = AF_INET; 682 range->ncprange_ip4addr = from; 683 range->ncprange_ip4mask = msk; 684 range->ncprange_ip4width = mask42bits(msk); 685 } 686 687 688 int 689 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 690 { 691 if (range->ncprange_family != AF_INET) 692 return 0; 693 range->ncprange_ip4mask = mask; 694 range->ncprange_ip4width = mask42bits(mask); 695 return 1; 696 } 697 698 void 699 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 700 const struct sockaddr *mask) 701 { 702 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 703 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 704 #ifndef NOINET6 705 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 706 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 707 #endif 708 709 switch (host->sa_family) { 710 case AF_INET: 711 range->ncprange_family = AF_INET; 712 range->ncprange_ip4addr = host4->sin_addr; 713 if (host4->sin_addr.s_addr == INADDR_ANY) { 714 range->ncprange_ip4mask.s_addr = INADDR_ANY; 715 range->ncprange_ip4width = 0; 716 } else if (mask4 && mask4->sin_family == AF_INET) { 717 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 718 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 719 } else { 720 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 721 range->ncprange_ip4width = 32; 722 } 723 break; 724 725 #ifndef NOINET6 726 case AF_INET6: 727 range->ncprange_family = AF_INET6; 728 range->ncprange_ip6addr = host6->sin6_addr; 729 if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) 730 range->ncprange_ip6width = 0; 731 else 732 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 733 break; 734 #endif 735 736 default: 737 range->ncprange_family = AF_UNSPEC; 738 } 739 } 740 741 void 742 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 743 struct sockaddr_storage *mask) 744 { 745 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 746 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 747 #ifndef NOINET6 748 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 749 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 750 #endif 751 752 memset(host, '\0', sizeof(*host)); 753 if (mask) 754 memset(mask, '\0', sizeof(*mask)); 755 756 switch (range->ncprange_family) { 757 case AF_INET: 758 host4->sin_family = AF_INET; 759 host4->sin_len = sizeof(*host4); 760 host4->sin_addr = range->ncprange_ip4addr; 761 if (mask4) { 762 mask4->sin_family = AF_INET; 763 mask4->sin_len = sizeof(*host4); 764 mask4->sin_addr = range->ncprange_ip4mask; 765 } 766 break; 767 768 #ifndef NOINET6 769 case AF_INET6: 770 host6->sin6_family = AF_INET6; 771 host6->sin6_len = sizeof(*host6); 772 host6->sin6_addr = range->ncprange_ip6addr; 773 if (mask6) { 774 mask6->sin6_family = AF_INET6; 775 mask6->sin6_len = sizeof(*host6); 776 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 777 } 778 break; 779 #endif 780 781 default: 782 host->ss_family = AF_UNSPEC; 783 if (mask) 784 mask->ss_family = AF_UNSPEC; 785 break; 786 } 787 } 788 789 int 790 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 791 { 792 switch (range->ncprange_family) { 793 case AF_INET: 794 addr->ncpaddr_family = AF_INET; 795 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 796 return 1; 797 #ifndef NOINET6 798 case AF_INET6: 799 addr->ncpaddr_family = AF_INET6; 800 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 801 return 1; 802 #endif 803 } 804 805 return 0; 806 } 807 808 int 809 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 810 { 811 if (range->ncprange_family != AF_INET) 812 return 0; 813 814 *addr = range->ncprange_ip4addr; 815 return 1; 816 } 817 818 int 819 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 820 { 821 switch (range->ncprange_family) { 822 case AF_INET: 823 *mask = range->ncprange_ip4mask; 824 return 1; 825 } 826 827 return 0; 828 } 829 830 int 831 ncprange_getwidth(const struct ncprange *range, int *width) 832 { 833 switch (range->ncprange_family) { 834 case AF_INET: 835 *width = range->ncprange_ip4width; 836 return 1; 837 #ifndef NOINET6 838 case AF_INET6: 839 *width = range->ncprange_ip6width; 840 return 1; 841 #endif 842 } 843 844 return 0; 845 } 846 847 const char * 848 ncprange_ntoa(const struct ncprange *range) 849 { 850 char *res; 851 struct ncpaddr addr; 852 int len; 853 854 if (!ncprange_getaddr(range, &addr)) 855 return "<AF_UNSPEC>"; 856 857 res = ncpaddr_ntowa(&addr); 858 len = strlen(res); 859 if (len >= NCP_ASCIIBUFFERSIZE - 1) 860 return res; 861 862 switch (range->ncprange_family) { 863 case AF_INET: 864 if (range->ncprange_ip4width == -1) { 865 /* A non-contiguous mask */ 866 for (; len >= 3; res[len -= 2] = '\0') 867 if (strcmp(res + len - 2, ".0")) 868 break; 869 snprintf(res + len, strlen(res) - len, "&0x%08lx", 870 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 871 } else if (range->ncprange_ip4width < 32) 872 snprintf(res + len, strlen(res) - len, "/%d", range->ncprange_ip4width); 873 874 return res; 875 876 #ifndef NOINET6 877 case AF_INET6: 878 if (range->ncprange_ip6width != 128) 879 snprintf(res + len, strlen(res) - len, "/%d", range->ncprange_ip6width); 880 881 return res; 882 #endif 883 } 884 885 return "<AF_UNSPEC>"; 886 } 887 888 #ifndef NOINET6 889 int 890 ncprange_scopeid(const struct ncprange *range) 891 { 892 const struct in6_addr *sin6; 893 int scopeid = -1; 894 895 if (range->ncprange_family == AF_INET6) { 896 sin6 = &range->ncprange_ip6addr; 897 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 898 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 899 scopeid = -1; 900 } 901 902 return scopeid; 903 } 904 #endif 905 906 int 907 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 908 { 909 int bits, len; 910 char *wp; 911 const char *cp; 912 char *s; 913 914 len = strcspn(data, "/"); 915 916 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 917 range->ncprange_family = AF_INET; 918 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 919 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 920 range->ncprange_ip4width = 32; 921 return 1; 922 #ifndef NOINET6 923 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 924 range->ncprange_family = AF_INET6; 925 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 926 range->ncprange_ip6width = 128; 927 return 1; 928 #endif 929 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 930 range->ncprange_family = AF_INET; 931 range->ncprange_ip4addr = ncp->ipcp.my_ip; 932 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 933 range->ncprange_ip4width = 32; 934 return 1; 935 #ifndef NOINET6 936 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 937 range->ncprange_family = AF_INET6; 938 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 939 range->ncprange_ip6width = 128; 940 return 1; 941 #endif 942 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 943 range->ncprange_family = AF_INET; 944 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 945 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 946 range->ncprange_ip4width = 32; 947 return 1; 948 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 949 range->ncprange_family = AF_INET; 950 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 951 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 952 range->ncprange_ip4width = 32; 953 return 1; 954 } 955 956 s = (char *)alloca(len + 1); 957 strncpy(s, data, len); 958 s[len] = '\0'; 959 bits = -1; 960 961 if (data[len] != '\0') { 962 bits = strtol(data + len + 1, &wp, 0); 963 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 964 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 965 return 0; 966 } 967 } 968 969 if ((cp = strchr(data, ':')) == NULL) { 970 range->ncprange_family = AF_INET; 971 972 range->ncprange_ip4addr = GetIpAddr(s); 973 974 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 975 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 976 return 0; 977 } 978 979 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 980 range->ncprange_ip4mask.s_addr = INADDR_ANY; 981 range->ncprange_ip4width = 0; 982 } else if (bits == -1) { 983 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 984 range->ncprange_ip4width = 32; 985 } else if (bits > 32) { 986 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 987 return 0; 988 } else { 989 range->ncprange_ip4mask = bits2mask4(bits); 990 range->ncprange_ip4width = bits; 991 } 992 993 return 1; 994 #ifndef NOINET6 995 } else if (strchr(cp + 1, ':') != NULL) { 996 range->ncprange_family = AF_INET6; 997 998 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 999 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 1000 return 0; 1001 } 1002 1003 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1004 range->ncprange_ip6width = 0; 1005 else 1006 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1007 return 1; 1008 #endif 1009 } 1010 1011 return 0; 1012 } 1013