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 1.4 2008/05/19 10:19:49 corecode Exp $ 28 */ 29 30 #include <sys/types.h> 31 #include <sys/select.h> 32 #include <sys/socket.h> 33 #ifdef __OpenBSD__ 34 #include <net/if_types.h> 35 #include <net/route.h> 36 #endif 37 #include <netinet/in.h> 38 #include <netinet/in_systm.h> 39 #include <netinet/ip.h> 40 #include <arpa/inet.h> 41 #include <sys/un.h> 42 43 #include <netdb.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <termios.h> 48 49 #include "log.h" 50 #include "ncpaddr.h" 51 #include "timer.h" 52 #include "fsm.h" 53 #include "defs.h" 54 #include "slcompress.h" 55 #include "iplist.h" 56 #include "throughput.h" 57 #include "mbuf.h" 58 #include "ipcp.h" 59 #include "descriptor.h" 60 #include "layer.h" 61 #include "lqr.h" 62 #include "hdlc.h" 63 #include "lcp.h" 64 #include "ccp.h" 65 #include "link.h" 66 #include "mp.h" 67 #include "ipv6cp.h" 68 #include "ncp.h" 69 70 71 #define ncprange_ip4addr u.ip4.ipaddr 72 #define ncprange_ip4mask u.ip4.mask 73 #define ncprange_ip4width u.ip4.width 74 #define ncpaddr_ip4addr u.ip4addr 75 #ifndef NOINET6 76 #define ncprange_ip6addr u.ip6.ipaddr 77 #define ncprange_ip6width u.ip6.width 78 #define ncpaddr_ip6addr u.ip6addr 79 #endif 80 81 #define NCP_ASCIIBUFFERSIZE 52 82 83 static struct in_addr 84 bits2mask4(int bits) 85 { 86 struct in_addr result; 87 u_int32_t bit = 0x80000000; 88 89 result.s_addr = 0; 90 91 while (bits) { 92 result.s_addr |= bit; 93 bit >>= 1; 94 bits--; 95 } 96 97 result.s_addr = htonl(result.s_addr); 98 return result; 99 } 100 101 static int 102 mask42bits(struct in_addr mask) 103 { 104 u_int32_t msk = ntohl(mask.s_addr); 105 u_int32_t tst; 106 int ret; 107 108 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 109 if (msk & tst) 110 break; 111 112 for (tst <<= 1; tst; tst <<= 1) 113 if (!(msk & tst)) 114 break; 115 116 return tst ? -1 : ret; 117 } 118 119 #ifndef NOINET6 120 static struct in6_addr 121 bits2mask6(int bits) 122 { 123 struct in6_addr result; 124 u_int32_t bit = 0x80; 125 u_char *c = result.s6_addr; 126 127 memset(&result, '\0', sizeof result); 128 129 while (bits) { 130 if (bit == 0) { 131 bit = 0x80; 132 c++; 133 } 134 *c |= bit; 135 bit >>= 1; 136 bits--; 137 } 138 139 return result; 140 } 141 142 static int 143 mask62bits(const struct in6_addr *mask) 144 { 145 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 146 const u_char *c, *p, *end; 147 int masklen; 148 149 p = (const u_char *)mask; 150 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 151 masklen += 8; 152 153 if (p < end) { 154 for (c = masks; c < masks + sizeof masks; c++) 155 if (*c == *p) { 156 masklen += c - masks; 157 break; 158 } 159 } 160 161 return masklen; 162 } 163 164 #if 0 165 static void 166 adjust_linklocal(struct sockaddr_in6 *sin6) 167 { 168 /* XXX: ?????!?!?!!!!! This is horrible ! */ 169 /* 170 * The kernel does not understand sin6_scope_id for routing at this moment. 171 * We should rather keep the embedded ID. 172 * jinmei@kame.net, 20011026 173 */ 174 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 175 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 176 sin6->sin6_scope_id = 177 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 178 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 179 } 180 } 181 #endif 182 #endif 183 184 void 185 ncpaddr_init(struct ncpaddr *addr) 186 { 187 addr->ncpaddr_family = AF_UNSPEC; 188 } 189 190 int 191 ncpaddr_isset(const struct ncpaddr *addr) 192 { 193 return addr->ncpaddr_family != AF_UNSPEC; 194 } 195 196 int 197 ncpaddr_isdefault(const struct ncpaddr *addr) 198 { 199 switch (addr->ncpaddr_family) { 200 case AF_INET: 201 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 202 return 1; 203 break; 204 205 #ifndef NOINET6 206 case AF_INET6: 207 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 208 return 1; 209 break; 210 #endif 211 } 212 213 return 0; 214 } 215 216 int 217 ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 218 { 219 if (addr->ncpaddr_family != cmp->ncpaddr_family) 220 return 0; 221 222 switch (addr->ncpaddr_family) { 223 case AF_INET: 224 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 225 226 #ifndef NOINET6 227 case AF_INET6: 228 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 229 sizeof addr->ncpaddr_ip6addr); 230 #endif 231 232 case AF_UNSPEC: 233 return 1; 234 } 235 236 return 0; 237 } 238 239 void 240 ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 241 { 242 switch (from->ncpaddr_family) { 243 case AF_INET: 244 addr->ncpaddr_family = AF_INET; 245 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 246 break; 247 #ifndef NOINET6 248 case AF_INET6: 249 addr->ncpaddr_family = AF_INET6; 250 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 251 break; 252 #endif 253 default: 254 addr->ncpaddr_family = AF_UNSPEC; 255 } 256 } 257 258 void 259 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 260 { 261 addr->ncpaddr_family = AF_INET; 262 addr->ncpaddr_ip4addr.s_addr = ip; 263 } 264 265 int 266 ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 267 { 268 if (addr->ncpaddr_family != AF_INET) 269 return 0; 270 *ip = addr->ncpaddr_ip4addr.s_addr; 271 return 1; 272 } 273 274 void 275 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 276 { 277 addr->ncpaddr_family = AF_INET; 278 addr->ncpaddr_ip4addr = ip; 279 } 280 281 int 282 ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 283 { 284 if (addr->ncpaddr_family != AF_INET) 285 return 0; 286 *ip = addr->ncpaddr_ip4addr; 287 return 1; 288 } 289 290 #ifndef NOINET6 291 void 292 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 293 { 294 addr->ncpaddr_family = AF_INET6; 295 addr->ncpaddr_ip6addr = *ip6; 296 } 297 298 int 299 ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 300 { 301 if (addr->ncpaddr_family != AF_INET6) 302 return 0; 303 *ip6 = addr->ncpaddr_ip6addr; 304 return 1; 305 } 306 #endif 307 308 void 309 ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 310 { 311 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 312 #ifndef NOINET6 313 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 314 #endif 315 316 memset(host, '\0', sizeof(*host)); 317 318 switch (addr->ncpaddr_family) { 319 case AF_INET: 320 host4->sin_family = AF_INET; 321 host4->sin_len = sizeof(*host4); 322 host4->sin_addr = addr->ncpaddr_ip4addr; 323 break; 324 325 #ifndef NOINET6 326 case AF_INET6: 327 host6->sin6_family = AF_INET6; 328 host6->sin6_len = sizeof(*host6); 329 host6->sin6_addr = addr->ncpaddr_ip6addr; 330 break; 331 #endif 332 333 default: 334 host->ss_family = AF_UNSPEC; 335 break; 336 } 337 } 338 339 void 340 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 341 { 342 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 343 #ifndef NOINET6 344 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 345 #endif 346 347 switch (host->sa_family) { 348 case AF_INET: 349 addr->ncpaddr_family = AF_INET; 350 addr->ncpaddr_ip4addr = host4->sin_addr; 351 break; 352 353 #ifndef NOINET6 354 case AF_INET6: 355 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 356 addr->ncpaddr_family = AF_INET; 357 addr->ncpaddr_ip4addr.s_addr = 358 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 359 } else { 360 addr->ncpaddr_family = AF_INET6; 361 addr->ncpaddr_ip6addr = host6->sin6_addr; 362 } 363 break; 364 #endif 365 366 default: 367 addr->ncpaddr_family = AF_UNSPEC; 368 } 369 } 370 371 static char * 372 ncpaddr_ntowa(const struct ncpaddr *addr) 373 { 374 static char res[NCP_ASCIIBUFFERSIZE]; 375 #ifndef NOINET6 376 struct sockaddr_in6 sin6; 377 #endif 378 379 switch (addr->ncpaddr_family) { 380 case AF_INET: 381 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 382 return res; 383 384 #ifndef NOINET6 385 case AF_INET6: 386 memset(&sin6, '\0', sizeof(sin6)); 387 sin6.sin6_len = sizeof(sin6); 388 sin6.sin6_family = AF_INET6; 389 sin6.sin6_addr = addr->ncpaddr_ip6addr; 390 #if 0 391 adjust_linklocal(&sin6); 392 #endif 393 #ifdef NI_WITHSCOPEID 394 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 395 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 396 #else 397 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 398 NULL, 0, NI_NUMERICHOST) != 0) 399 #endif 400 break; 401 402 return res; 403 #endif 404 } 405 406 snprintf(res, sizeof res, "<AF_UNSPEC>"); 407 return res; 408 } 409 410 const char * 411 ncpaddr_ntoa(const struct ncpaddr *addr) 412 { 413 return ncpaddr_ntowa(addr); 414 } 415 416 417 int 418 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 419 { 420 struct ncprange range; 421 422 if (!ncprange_aton(&range, ncp, data)) 423 return 0; 424 425 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 426 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 427 return 0; 428 } 429 430 #ifndef NOINET6 431 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 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, strlen(res) - len, "&0x%08lx", 873 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 874 } else if (range->ncprange_ip4width < 32) 875 snprintf(res + len, strlen(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, strlen(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