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 static void 165 adjust_linklocal(struct sockaddr_in6 *sin6) 166 { 167 /* XXX: ?????!?!?!!!!! This is horrible ! */ 168 #if 0 169 /* 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 #endif 181 } 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 adjust_linklocal(&sin6); 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 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 425 return 0; 426 } 427 428 #ifndef NOINET6 429 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 430 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 431 return 0; 432 } 433 #endif 434 435 switch (range.ncprange_family) { 436 case AF_INET: 437 addr->ncpaddr_family = range.ncprange_family; 438 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 439 return 1; 440 441 #ifndef NOINET6 442 case AF_INET6: 443 addr->ncpaddr_family = range.ncprange_family; 444 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 445 return 1; 446 #endif 447 } 448 449 return 0; 450 } 451 452 void 453 ncprange_init(struct ncprange *range) 454 { 455 range->ncprange_family = AF_UNSPEC; 456 } 457 458 int 459 ncprange_isset(const struct ncprange *range) 460 { 461 return range->ncprange_family != AF_UNSPEC; 462 } 463 464 int 465 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 466 { 467 if (range->ncprange_family != cmp->ncprange_family) 468 return 0; 469 470 switch (range->ncprange_family) { 471 case AF_INET: 472 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 473 return 0; 474 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 475 476 #ifndef NOINET6 477 case AF_INET6: 478 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 479 return 0; 480 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 481 sizeof range->ncprange_ip6addr); 482 #endif 483 484 case AF_UNSPEC: 485 return 1; 486 } 487 488 return 0; 489 } 490 491 int 492 ncprange_isdefault(const struct ncprange *range) 493 { 494 switch (range->ncprange_family) { 495 case AF_INET: 496 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 497 return 1; 498 break; 499 500 #ifndef NOINET6 501 case AF_INET6: 502 if (range->ncprange_ip6width == 0 && 503 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 504 return 1; 505 break; 506 #endif 507 } 508 509 return 0; 510 } 511 512 void 513 ncprange_setdefault(struct ncprange *range, int af) 514 { 515 memset(range, '\0', sizeof *range); 516 range->ncprange_family = af; 517 } 518 519 int 520 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 521 { 522 #ifndef NOINET6 523 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 524 const u_char *addrp, *rangep; 525 int bits; 526 #endif 527 528 if (range->ncprange_family != addr->ncpaddr_family) 529 return 0; 530 531 switch (range->ncprange_family) { 532 case AF_INET: 533 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 534 range->ncprange_ip4mask.s_addr); 535 536 #ifndef NOINET6 537 case AF_INET6: 538 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 539 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 540 541 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 542 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 543 return 0; 544 545 return 1; 546 #endif 547 } 548 549 return 0; 550 } 551 552 int 553 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 554 { 555 switch (range->ncprange_family) { 556 case AF_INET: 557 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 558 range->ncprange_ip4mask.s_addr); 559 } 560 561 return 0; 562 } 563 564 void 565 ncprange_copy(struct ncprange *range, const struct ncprange *from) 566 { 567 switch (from->ncprange_family) { 568 case AF_INET: 569 range->ncprange_family = AF_INET; 570 range->ncprange_ip4addr = from->ncprange_ip4addr; 571 range->ncprange_ip4mask = from->ncprange_ip4mask; 572 range->ncprange_ip4width = from->ncprange_ip4width; 573 break; 574 575 #ifndef NOINET6 576 case AF_INET6: 577 range->ncprange_family = AF_INET6; 578 range->ncprange_ip6addr = from->ncprange_ip6addr; 579 range->ncprange_ip6width = from->ncprange_ip6width; 580 break; 581 #endif 582 583 default: 584 range->ncprange_family = AF_UNSPEC; 585 } 586 } 587 588 void 589 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 590 { 591 ncprange_sethost(range, addr); 592 ncprange_setwidth(range, width); 593 } 594 595 void 596 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 597 { 598 switch (from->ncpaddr_family) { 599 case AF_INET: 600 range->ncprange_family = AF_INET; 601 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 602 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 603 range->ncprange_ip4mask.s_addr = INADDR_ANY; 604 range->ncprange_ip4width = 0; 605 } else { 606 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 607 range->ncprange_ip4width = 32; 608 } 609 break; 610 611 #ifndef NOINET6 612 case AF_INET6: 613 range->ncprange_family = AF_INET6; 614 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 615 range->ncprange_ip6width = 128; 616 break; 617 #endif 618 619 default: 620 range->ncprange_family = AF_UNSPEC; 621 } 622 } 623 624 int 625 ncprange_ishost(const struct ncprange *range) 626 { 627 switch (range->ncprange_family) { 628 case AF_INET: 629 return range->ncprange_ip4width == 32; 630 #ifndef NOINET6 631 case AF_INET6: 632 return range->ncprange_ip6width == 128; 633 #endif 634 } 635 636 return (0); 637 } 638 639 int 640 ncprange_setwidth(struct ncprange *range, int width) 641 { 642 switch (range->ncprange_family) { 643 case AF_INET: 644 if (width < 0 || width > 32) 645 break; 646 range->ncprange_ip4width = width; 647 range->ncprange_ip4mask = bits2mask4(width); 648 break; 649 650 #ifndef NOINET6 651 case AF_INET6: 652 if (width < 0 || width > 128) 653 break; 654 range->ncprange_ip6width = width; 655 break; 656 #endif 657 658 case AF_UNSPEC: 659 return 1; 660 } 661 662 return 0; 663 } 664 665 void 666 ncprange_setip4host(struct ncprange *range, struct in_addr from) 667 { 668 range->ncprange_family = AF_INET; 669 range->ncprange_ip4addr = from; 670 if (from.s_addr == INADDR_ANY) { 671 range->ncprange_ip4mask.s_addr = INADDR_ANY; 672 range->ncprange_ip4width = 0; 673 } else { 674 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 675 range->ncprange_ip4width = 32; 676 } 677 } 678 679 void 680 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 681 { 682 range->ncprange_family = AF_INET; 683 range->ncprange_ip4addr = from; 684 range->ncprange_ip4mask = msk; 685 range->ncprange_ip4width = mask42bits(msk); 686 } 687 688 689 int 690 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 691 { 692 if (range->ncprange_family != AF_INET) 693 return 0; 694 range->ncprange_ip4mask = mask; 695 range->ncprange_ip4width = mask42bits(mask); 696 return 1; 697 } 698 699 void 700 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 701 const struct sockaddr *mask) 702 { 703 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 704 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 705 #ifndef NOINET6 706 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 707 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 708 #endif 709 710 switch (host->sa_family) { 711 case AF_INET: 712 range->ncprange_family = AF_INET; 713 range->ncprange_ip4addr = host4->sin_addr; 714 if (host4->sin_addr.s_addr == INADDR_ANY) { 715 range->ncprange_ip4mask.s_addr = INADDR_ANY; 716 range->ncprange_ip4width = 0; 717 } else if (mask4 && mask4->sin_family == AF_INET) { 718 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 719 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 720 } else { 721 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 722 range->ncprange_ip4width = 32; 723 } 724 break; 725 726 #ifndef NOINET6 727 case AF_INET6: 728 range->ncprange_family = AF_INET6; 729 range->ncprange_ip6addr = host6->sin6_addr; 730 if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) 731 range->ncprange_ip6width = 0; 732 else 733 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 734 break; 735 #endif 736 737 default: 738 range->ncprange_family = AF_UNSPEC; 739 } 740 } 741 742 void 743 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 744 struct sockaddr_storage *mask) 745 { 746 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 747 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 748 #ifndef NOINET6 749 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 750 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 751 #endif 752 753 memset(host, '\0', sizeof(*host)); 754 if (mask) 755 memset(mask, '\0', sizeof(*mask)); 756 757 switch (range->ncprange_family) { 758 case AF_INET: 759 host4->sin_family = AF_INET; 760 host4->sin_len = sizeof(*host4); 761 host4->sin_addr = range->ncprange_ip4addr; 762 if (mask4) { 763 mask4->sin_family = AF_INET; 764 mask4->sin_len = sizeof(*host4); 765 mask4->sin_addr = range->ncprange_ip4mask; 766 } 767 break; 768 769 #ifndef NOINET6 770 case AF_INET6: 771 host6->sin6_family = AF_INET6; 772 host6->sin6_len = sizeof(*host6); 773 host6->sin6_addr = range->ncprange_ip6addr; 774 if (mask6) { 775 mask6->sin6_family = AF_INET6; 776 mask6->sin6_len = sizeof(*host6); 777 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 778 } 779 break; 780 #endif 781 782 default: 783 host->ss_family = AF_UNSPEC; 784 if (mask) 785 mask->ss_family = AF_UNSPEC; 786 break; 787 } 788 } 789 790 int 791 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 792 { 793 switch (range->ncprange_family) { 794 case AF_INET: 795 addr->ncpaddr_family = AF_INET; 796 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 797 return 1; 798 #ifndef NOINET6 799 case AF_INET6: 800 addr->ncpaddr_family = AF_INET6; 801 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 802 return 1; 803 #endif 804 } 805 806 return 0; 807 } 808 809 int 810 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 811 { 812 if (range->ncprange_family != AF_INET) 813 return 0; 814 815 *addr = range->ncprange_ip4addr; 816 return 1; 817 } 818 819 int 820 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 821 { 822 switch (range->ncprange_family) { 823 case AF_INET: 824 *mask = range->ncprange_ip4mask; 825 return 1; 826 } 827 828 return 0; 829 } 830 831 int 832 ncprange_getwidth(const struct ncprange *range, int *width) 833 { 834 switch (range->ncprange_family) { 835 case AF_INET: 836 *width = range->ncprange_ip4width; 837 return 1; 838 #ifndef NOINET6 839 case AF_INET6: 840 *width = range->ncprange_ip6width; 841 return 1; 842 #endif 843 } 844 845 return 0; 846 } 847 848 const char * 849 ncprange_ntoa(const struct ncprange *range) 850 { 851 char *res; 852 struct ncpaddr addr; 853 int len; 854 855 if (!ncprange_getaddr(range, &addr)) 856 return "<AF_UNSPEC>"; 857 858 res = ncpaddr_ntowa(&addr); 859 len = strlen(res); 860 if (len >= NCP_ASCIIBUFFERSIZE - 1) 861 return res; 862 863 switch (range->ncprange_family) { 864 case AF_INET: 865 if (range->ncprange_ip4width == -1) { 866 /* A non-contiguous mask */ 867 for (; len >= 3; res[len -= 2] = '\0') 868 if (strcmp(res + len - 2, ".0")) 869 break; 870 snprintf(res + len, strlen(res) - len, "&0x%08lx", 871 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 872 } else if (range->ncprange_ip4width < 32) 873 snprintf(res + len, strlen(res) - len, "/%d", range->ncprange_ip4width); 874 875 return res; 876 877 #ifndef NOINET6 878 case AF_INET6: 879 if (range->ncprange_ip6width != 128) 880 snprintf(res + len, strlen(res) - len, "/%d", range->ncprange_ip6width); 881 882 return res; 883 #endif 884 } 885 886 return "<AF_UNSPEC>"; 887 } 888 889 #ifndef NOINET6 890 int 891 ncprange_scopeid(const struct ncprange *range) 892 { 893 const struct in6_addr *sin6; 894 int scopeid = -1; 895 896 if (range->ncprange_family == AF_INET6) { 897 sin6 = &range->ncprange_ip6addr; 898 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 899 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 900 scopeid = -1; 901 } 902 903 return scopeid; 904 } 905 #endif 906 907 int 908 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 909 { 910 int bits, len; 911 char *wp; 912 const char *cp; 913 char *s; 914 915 len = strcspn(data, "/"); 916 917 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 918 range->ncprange_family = AF_INET; 919 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 920 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 921 range->ncprange_ip4width = 32; 922 return 1; 923 #ifndef NOINET6 924 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 925 range->ncprange_family = AF_INET6; 926 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 927 range->ncprange_ip6width = 128; 928 return 1; 929 #endif 930 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 931 range->ncprange_family = AF_INET; 932 range->ncprange_ip4addr = ncp->ipcp.my_ip; 933 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 934 range->ncprange_ip4width = 32; 935 return 1; 936 #ifndef NOINET6 937 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 938 range->ncprange_family = AF_INET6; 939 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 940 range->ncprange_ip6width = 128; 941 return 1; 942 #endif 943 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 944 range->ncprange_family = AF_INET; 945 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 946 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 947 range->ncprange_ip4width = 32; 948 return 1; 949 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 950 range->ncprange_family = AF_INET; 951 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 952 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 953 range->ncprange_ip4width = 32; 954 return 1; 955 } 956 957 s = (char *)alloca(len + 1); 958 strncpy(s, data, len); 959 s[len] = '\0'; 960 bits = -1; 961 962 if (data[len] != '\0') { 963 bits = strtol(data + len + 1, &wp, 0); 964 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 965 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 966 return 0; 967 } 968 } 969 970 if ((cp = strchr(data, ':')) == NULL) { 971 range->ncprange_family = AF_INET; 972 973 range->ncprange_ip4addr = GetIpAddr(s); 974 975 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 976 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 977 return 0; 978 } 979 980 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 981 range->ncprange_ip4mask.s_addr = INADDR_ANY; 982 range->ncprange_ip4width = 0; 983 } else if (bits == -1) { 984 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 985 range->ncprange_ip4width = 32; 986 } else if (bits > 32) { 987 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 988 return 0; 989 } else { 990 range->ncprange_ip4mask = bits2mask4(bits); 991 range->ncprange_ip4width = bits; 992 } 993 994 return 1; 995 #ifndef NOINET6 996 } else if (strchr(cp + 1, ':') != NULL) { 997 range->ncprange_family = AF_INET6; 998 999 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 1000 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 1001 return 0; 1002 } 1003 1004 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1005 range->ncprange_ip6width = 0; 1006 else 1007 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1008 return 1; 1009 #endif 1010 } 1011 1012 return 0; 1013 } 1014