1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 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 static struct in_addr 80 bits2mask4(int bits) 81 { 82 struct in_addr result; 83 u_int32_t bit = 0x80000000; 84 85 result.s_addr = 0; 86 87 while (bits) { 88 result.s_addr |= bit; 89 bit >>= 1; 90 bits--; 91 } 92 93 result.s_addr = htonl(result.s_addr); 94 return result; 95 } 96 97 static int 98 mask42bits(struct in_addr mask) 99 { 100 u_int32_t msk = ntohl(mask.s_addr); 101 u_int32_t tst; 102 int ret; 103 104 for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 105 if (msk & tst) 106 break; 107 108 for (tst <<= 1; tst; tst <<= 1) 109 if (!(msk & tst)) 110 break; 111 112 return tst ? -1 : ret; 113 } 114 115 #ifndef NOINET6 116 static struct in6_addr 117 bits2mask6(int bits) 118 { 119 struct in6_addr result; 120 u_int32_t bit = 0x80; 121 u_char *c = result.s6_addr; 122 123 memset(&result, '\0', sizeof result); 124 125 while (bits) { 126 if (bit == 0) { 127 bit = 0x80; 128 c++; 129 } 130 *c |= bit; 131 bit >>= 1; 132 bits--; 133 } 134 135 return result; 136 } 137 138 static int 139 mask62bits(const struct in6_addr *mask) 140 { 141 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 142 const u_char *c, *p, *end; 143 int masklen, m; 144 145 p = (const u_char *)mask; 146 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 147 masklen += 8; 148 149 if (p < end) { 150 for (c = masks, m = 0; c < masks + sizeof masks; c++, m++) 151 if (*c == *p) { 152 masklen += m; 153 break; 154 } 155 } 156 157 return masklen; 158 } 159 160 #if 0 161 static void 162 adjust_linklocal(struct sockaddr_in6 *sin6) 163 { 164 /* XXX: ?????!?!?!!!!! This is horrible ! */ 165 /* 166 * The kernel does not understand sin6_scope_id for routing at this moment. 167 * We should rather keep the embedded ID. 168 * jinmei@kame.net, 20011026 169 */ 170 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 171 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 172 sin6->sin6_scope_id = 173 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 174 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 175 } 176 } 177 #endif 178 #endif 179 180 void 181 ncpaddr_init(struct ncpaddr *addr) 182 { 183 addr->ncpaddr_family = AF_UNSPEC; 184 } 185 186 int 187 ncpaddr_isset(const struct ncpaddr *addr) 188 { 189 return addr->ncpaddr_family != AF_UNSPEC; 190 } 191 192 int 193 ncpaddr_isdefault(const struct ncpaddr *addr) 194 { 195 switch (addr->ncpaddr_family) { 196 case AF_INET: 197 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 198 return 1; 199 break; 200 201 #ifndef NOINET6 202 case AF_INET6: 203 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 204 return 1; 205 break; 206 #endif 207 } 208 209 return 0; 210 } 211 212 int 213 ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 214 { 215 if (addr->ncpaddr_family != cmp->ncpaddr_family) 216 return 0; 217 218 switch (addr->ncpaddr_family) { 219 case AF_INET: 220 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 221 222 #ifndef NOINET6 223 case AF_INET6: 224 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 225 sizeof addr->ncpaddr_ip6addr); 226 #endif 227 228 case AF_UNSPEC: 229 return 1; 230 } 231 232 return 0; 233 } 234 235 void 236 ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 237 { 238 switch (from->ncpaddr_family) { 239 case AF_INET: 240 addr->ncpaddr_family = AF_INET; 241 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 242 break; 243 #ifndef NOINET6 244 case AF_INET6: 245 addr->ncpaddr_family = AF_INET6; 246 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 247 break; 248 #endif 249 default: 250 addr->ncpaddr_family = AF_UNSPEC; 251 } 252 } 253 254 void 255 ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 256 { 257 addr->ncpaddr_family = AF_INET; 258 addr->ncpaddr_ip4addr.s_addr = ip; 259 } 260 261 int 262 ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 263 { 264 if (addr->ncpaddr_family != AF_INET) 265 return 0; 266 *ip = addr->ncpaddr_ip4addr.s_addr; 267 return 1; 268 } 269 270 void 271 ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 272 { 273 addr->ncpaddr_family = AF_INET; 274 addr->ncpaddr_ip4addr = ip; 275 } 276 277 int 278 ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 279 { 280 if (addr->ncpaddr_family != AF_INET) 281 return 0; 282 *ip = addr->ncpaddr_ip4addr; 283 return 1; 284 } 285 286 #ifndef NOINET6 287 void 288 ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 289 { 290 addr->ncpaddr_family = AF_INET6; 291 addr->ncpaddr_ip6addr = *ip6; 292 } 293 294 int 295 ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 296 { 297 if (addr->ncpaddr_family != AF_INET6) 298 return 0; 299 *ip6 = addr->ncpaddr_ip6addr; 300 return 1; 301 } 302 #endif 303 304 void 305 ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 306 { 307 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 308 #ifndef NOINET6 309 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 310 #endif 311 312 memset(host, '\0', sizeof(*host)); 313 314 switch (addr->ncpaddr_family) { 315 case AF_INET: 316 host4->sin_family = AF_INET; 317 host4->sin_len = sizeof(*host4); 318 host4->sin_addr = addr->ncpaddr_ip4addr; 319 break; 320 321 #ifndef NOINET6 322 case AF_INET6: 323 host6->sin6_family = AF_INET6; 324 host6->sin6_len = sizeof(*host6); 325 host6->sin6_addr = addr->ncpaddr_ip6addr; 326 break; 327 #endif 328 329 default: 330 host->ss_family = AF_UNSPEC; 331 break; 332 } 333 } 334 335 void 336 ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 337 { 338 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 339 #ifndef NOINET6 340 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 341 #endif 342 343 switch (host->sa_family) { 344 case AF_INET: 345 addr->ncpaddr_family = AF_INET; 346 addr->ncpaddr_ip4addr = host4->sin_addr; 347 break; 348 349 #ifndef NOINET6 350 case AF_INET6: 351 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 352 addr->ncpaddr_family = AF_INET; 353 addr->ncpaddr_ip4addr.s_addr = 354 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 355 } else { 356 addr->ncpaddr_family = AF_INET6; 357 addr->ncpaddr_ip6addr = host6->sin6_addr; 358 } 359 break; 360 #endif 361 362 default: 363 addr->ncpaddr_family = AF_UNSPEC; 364 } 365 } 366 367 static char * 368 ncpaddr_ntowa(const struct ncpaddr *addr) 369 { 370 static char res[NCP_ASCIIBUFFERSIZE]; 371 #ifndef NOINET6 372 struct sockaddr_in6 sin6; 373 #endif 374 375 switch (addr->ncpaddr_family) { 376 case AF_INET: 377 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 378 return res; 379 380 #ifndef NOINET6 381 case AF_INET6: 382 memset(&sin6, '\0', sizeof(sin6)); 383 sin6.sin6_len = sizeof(sin6); 384 sin6.sin6_family = AF_INET6; 385 sin6.sin6_addr = addr->ncpaddr_ip6addr; 386 #if 0 387 adjust_linklocal(&sin6); 388 #endif 389 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 390 NULL, 0, NI_NUMERICHOST) != 0) 391 break; 392 393 return res; 394 #endif 395 } 396 397 snprintf(res, sizeof res, "<AF_UNSPEC>"); 398 return res; 399 } 400 401 const char * 402 ncpaddr_ntoa(const struct ncpaddr *addr) 403 { 404 return ncpaddr_ntowa(addr); 405 } 406 407 408 int 409 ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 410 { 411 struct ncprange range; 412 413 if (!ncprange_aton(&range, ncp, data)) 414 return 0; 415 416 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32 && 417 range.ncprange_ip4addr.s_addr != INADDR_ANY) { 418 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 419 return 0; 420 } 421 422 #ifndef NOINET6 423 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128 && 424 !IN6_IS_ADDR_UNSPECIFIED(&range.ncprange_ip6addr)) { 425 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 426 return 0; 427 } 428 #endif 429 430 switch (range.ncprange_family) { 431 case AF_INET: 432 addr->ncpaddr_family = range.ncprange_family; 433 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 434 return 1; 435 436 #ifndef NOINET6 437 case AF_INET6: 438 addr->ncpaddr_family = range.ncprange_family; 439 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 440 return 1; 441 #endif 442 } 443 444 return 0; 445 } 446 447 void 448 ncprange_init(struct ncprange *range) 449 { 450 range->ncprange_family = AF_UNSPEC; 451 } 452 453 int 454 ncprange_isset(const struct ncprange *range) 455 { 456 return range->ncprange_family != AF_UNSPEC; 457 } 458 459 int 460 ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 461 { 462 if (range->ncprange_family != cmp->ncprange_family) 463 return 0; 464 465 switch (range->ncprange_family) { 466 case AF_INET: 467 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 468 return 0; 469 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 470 471 #ifndef NOINET6 472 case AF_INET6: 473 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 474 return 0; 475 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 476 sizeof range->ncprange_ip6addr); 477 #endif 478 479 case AF_UNSPEC: 480 return 1; 481 } 482 483 return 0; 484 } 485 486 int 487 ncprange_isdefault(const struct ncprange *range) 488 { 489 switch (range->ncprange_family) { 490 case AF_INET: 491 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 492 return 1; 493 break; 494 495 #ifndef NOINET6 496 case AF_INET6: 497 if (range->ncprange_ip6width == 0 && 498 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 499 return 1; 500 break; 501 #endif 502 } 503 504 return 0; 505 } 506 507 void 508 ncprange_setdefault(struct ncprange *range, int af) 509 { 510 memset(range, '\0', sizeof *range); 511 range->ncprange_family = af; 512 } 513 514 int 515 ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 516 { 517 #ifndef NOINET6 518 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 519 const u_char *addrp, *rangep; 520 int bits; 521 #endif 522 523 if (range->ncprange_family != addr->ncpaddr_family) 524 return 0; 525 526 switch (range->ncprange_family) { 527 case AF_INET: 528 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 529 range->ncprange_ip4mask.s_addr); 530 531 #ifndef NOINET6 532 case AF_INET6: 533 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 534 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 535 536 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 537 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 538 return 0; 539 540 return 1; 541 #endif 542 } 543 544 return 0; 545 } 546 547 int 548 ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 549 { 550 switch (range->ncprange_family) { 551 case AF_INET: 552 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 553 range->ncprange_ip4mask.s_addr); 554 } 555 556 return 0; 557 } 558 559 void 560 ncprange_copy(struct ncprange *range, const struct ncprange *from) 561 { 562 switch (from->ncprange_family) { 563 case AF_INET: 564 range->ncprange_family = AF_INET; 565 range->ncprange_ip4addr = from->ncprange_ip4addr; 566 range->ncprange_ip4mask = from->ncprange_ip4mask; 567 range->ncprange_ip4width = from->ncprange_ip4width; 568 break; 569 570 #ifndef NOINET6 571 case AF_INET6: 572 range->ncprange_family = AF_INET6; 573 range->ncprange_ip6addr = from->ncprange_ip6addr; 574 range->ncprange_ip6width = from->ncprange_ip6width; 575 break; 576 #endif 577 578 default: 579 range->ncprange_family = AF_UNSPEC; 580 } 581 } 582 583 void 584 ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 585 { 586 ncprange_sethost(range, addr); 587 ncprange_setwidth(range, width); 588 } 589 590 void 591 ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 592 { 593 switch (from->ncpaddr_family) { 594 case AF_INET: 595 range->ncprange_family = AF_INET; 596 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 597 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 598 range->ncprange_ip4mask.s_addr = INADDR_ANY; 599 range->ncprange_ip4width = 0; 600 } else { 601 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 602 range->ncprange_ip4width = 32; 603 } 604 break; 605 606 #ifndef NOINET6 607 case AF_INET6: 608 range->ncprange_family = AF_INET6; 609 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 610 range->ncprange_ip6width = 128; 611 break; 612 #endif 613 614 default: 615 range->ncprange_family = AF_UNSPEC; 616 } 617 } 618 619 int 620 ncprange_ishost(const struct ncprange *range) 621 { 622 switch (range->ncprange_family) { 623 case AF_INET: 624 return range->ncprange_ip4width == 32; 625 #ifndef NOINET6 626 case AF_INET6: 627 return range->ncprange_ip6width == 128; 628 #endif 629 } 630 631 return (0); 632 } 633 634 int 635 ncprange_setwidth(struct ncprange *range, int width) 636 { 637 switch (range->ncprange_family) { 638 case AF_INET: 639 if (width < 0 || width > 32) 640 break; 641 range->ncprange_ip4width = width; 642 range->ncprange_ip4mask = bits2mask4(width); 643 break; 644 645 #ifndef NOINET6 646 case AF_INET6: 647 if (width < 0 || width > 128) 648 break; 649 range->ncprange_ip6width = width; 650 break; 651 #endif 652 653 case AF_UNSPEC: 654 return 1; 655 } 656 657 return 0; 658 } 659 660 void 661 ncprange_setip4host(struct ncprange *range, struct in_addr from) 662 { 663 range->ncprange_family = AF_INET; 664 range->ncprange_ip4addr = from; 665 if (from.s_addr == INADDR_ANY) { 666 range->ncprange_ip4mask.s_addr = INADDR_ANY; 667 range->ncprange_ip4width = 0; 668 } else { 669 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 670 range->ncprange_ip4width = 32; 671 } 672 } 673 674 void 675 ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 676 { 677 range->ncprange_family = AF_INET; 678 range->ncprange_ip4addr = from; 679 range->ncprange_ip4mask = msk; 680 range->ncprange_ip4width = mask42bits(msk); 681 } 682 683 684 int 685 ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 686 { 687 if (range->ncprange_family != AF_INET) 688 return 0; 689 range->ncprange_ip4mask = mask; 690 range->ncprange_ip4width = mask42bits(mask); 691 return 1; 692 } 693 694 void 695 ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 696 const struct sockaddr *mask) 697 { 698 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 699 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 700 #ifndef NOINET6 701 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 702 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 703 #endif 704 705 switch (host->sa_family) { 706 case AF_INET: 707 range->ncprange_family = AF_INET; 708 range->ncprange_ip4addr = host4->sin_addr; 709 if (host4->sin_addr.s_addr == INADDR_ANY) { 710 range->ncprange_ip4mask.s_addr = INADDR_ANY; 711 range->ncprange_ip4width = 0; 712 } else if (mask4 && mask4->sin_family == AF_INET) { 713 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 714 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 715 } else { 716 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 717 range->ncprange_ip4width = 32; 718 } 719 break; 720 721 #ifndef NOINET6 722 case AF_INET6: 723 range->ncprange_family = AF_INET6; 724 range->ncprange_ip6addr = host6->sin6_addr; 725 if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) 726 range->ncprange_ip6width = 0; 727 else 728 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 729 break; 730 #endif 731 732 default: 733 range->ncprange_family = AF_UNSPEC; 734 } 735 } 736 737 void 738 ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 739 struct sockaddr_storage *mask) 740 { 741 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 742 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 743 #ifndef NOINET6 744 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 745 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 746 #endif 747 748 memset(host, '\0', sizeof(*host)); 749 if (mask) 750 memset(mask, '\0', sizeof(*mask)); 751 752 switch (range->ncprange_family) { 753 case AF_INET: 754 host4->sin_family = AF_INET; 755 host4->sin_len = sizeof(*host4); 756 host4->sin_addr = range->ncprange_ip4addr; 757 if (mask4) { 758 mask4->sin_family = AF_INET; 759 mask4->sin_len = sizeof(*host4); 760 mask4->sin_addr = range->ncprange_ip4mask; 761 } 762 break; 763 764 #ifndef NOINET6 765 case AF_INET6: 766 host6->sin6_family = AF_INET6; 767 host6->sin6_len = sizeof(*host6); 768 host6->sin6_addr = range->ncprange_ip6addr; 769 if (mask6) { 770 mask6->sin6_family = AF_INET6; 771 mask6->sin6_len = sizeof(*host6); 772 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 773 } 774 break; 775 #endif 776 777 default: 778 host->ss_family = AF_UNSPEC; 779 if (mask) 780 mask->ss_family = AF_UNSPEC; 781 break; 782 } 783 } 784 785 int 786 ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 787 { 788 switch (range->ncprange_family) { 789 case AF_INET: 790 addr->ncpaddr_family = AF_INET; 791 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 792 return 1; 793 #ifndef NOINET6 794 case AF_INET6: 795 addr->ncpaddr_family = AF_INET6; 796 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 797 return 1; 798 #endif 799 } 800 801 return 0; 802 } 803 804 int 805 ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 806 { 807 if (range->ncprange_family != AF_INET) 808 return 0; 809 810 *addr = range->ncprange_ip4addr; 811 return 1; 812 } 813 814 int 815 ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 816 { 817 switch (range->ncprange_family) { 818 case AF_INET: 819 *mask = range->ncprange_ip4mask; 820 return 1; 821 } 822 823 return 0; 824 } 825 826 int 827 ncprange_getwidth(const struct ncprange *range, int *width) 828 { 829 switch (range->ncprange_family) { 830 case AF_INET: 831 *width = range->ncprange_ip4width; 832 return 1; 833 #ifndef NOINET6 834 case AF_INET6: 835 *width = range->ncprange_ip6width; 836 return 1; 837 #endif 838 } 839 840 return 0; 841 } 842 843 const char * 844 ncprange_ntoa(const struct ncprange *range) 845 { 846 char *res; 847 struct ncpaddr addr; 848 int len; 849 850 if (!ncprange_getaddr(range, &addr)) 851 return "<AF_UNSPEC>"; 852 853 res = ncpaddr_ntowa(&addr); 854 len = strlen(res); 855 if (len >= NCP_ASCIIBUFFERSIZE - 1) 856 return res; 857 858 switch (range->ncprange_family) { 859 case AF_INET: 860 if (range->ncprange_ip4width == -1) { 861 /* A non-contiguous mask */ 862 for (; len >= 3; res[len -= 2] = '\0') 863 if (strcmp(res + len - 2, ".0")) 864 break; 865 snprintf(res + len, sizeof res - len, "&0x%08lx", 866 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 867 } else if (range->ncprange_ip4width < 32) 868 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 869 870 return res; 871 872 #ifndef NOINET6 873 case AF_INET6: 874 if (range->ncprange_ip6width != 128) 875 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 876 877 return res; 878 #endif 879 } 880 881 return "<AF_UNSPEC>"; 882 } 883 884 #ifndef NOINET6 885 int 886 ncprange_scopeid(const struct ncprange *range) 887 { 888 const struct in6_addr *sin6; 889 int scopeid = -1; 890 891 if (range->ncprange_family == AF_INET6) { 892 sin6 = &range->ncprange_ip6addr; 893 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 894 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 895 scopeid = -1; 896 } 897 898 return scopeid; 899 } 900 #endif 901 902 int 903 ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 904 { 905 int bits, len; 906 char *wp; 907 const char *cp; 908 char *s; 909 910 len = strcspn(data, "/"); 911 912 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 913 range->ncprange_family = AF_INET; 914 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 915 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 916 range->ncprange_ip4width = 32; 917 return 1; 918 #ifndef NOINET6 919 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 920 range->ncprange_family = AF_INET6; 921 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 922 range->ncprange_ip6width = 128; 923 return 1; 924 #endif 925 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 926 range->ncprange_family = AF_INET; 927 range->ncprange_ip4addr = ncp->ipcp.my_ip; 928 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 929 range->ncprange_ip4width = 32; 930 return 1; 931 #ifndef NOINET6 932 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 933 range->ncprange_family = AF_INET6; 934 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 935 range->ncprange_ip6width = 128; 936 return 1; 937 #endif 938 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 939 range->ncprange_family = AF_INET; 940 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 941 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 942 range->ncprange_ip4width = 32; 943 return 1; 944 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 945 range->ncprange_family = AF_INET; 946 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 947 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 948 range->ncprange_ip4width = 32; 949 return 1; 950 } 951 952 s = (char *)alloca(len + 1); 953 strncpy(s, data, len); 954 s[len] = '\0'; 955 bits = -1; 956 957 if (data[len] != '\0') { 958 bits = strtol(data + len + 1, &wp, 0); 959 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 960 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 961 return 0; 962 } 963 } 964 965 if ((cp = strchr(data, ':')) == NULL) { 966 range->ncprange_family = AF_INET; 967 968 range->ncprange_ip4addr = GetIpAddr(s); 969 970 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 971 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 972 return 0; 973 } 974 975 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 976 range->ncprange_ip4mask.s_addr = INADDR_ANY; 977 range->ncprange_ip4width = 0; 978 } else if (bits == -1) { 979 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 980 range->ncprange_ip4width = 32; 981 } else if (bits > 32) { 982 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 983 return 0; 984 } else { 985 range->ncprange_ip4mask = bits2mask4(bits); 986 range->ncprange_ip4width = bits; 987 } 988 989 return 1; 990 #ifndef NOINET6 991 } else if (strchr(cp + 1, ':') != NULL) { 992 range->ncprange_family = AF_INET6; 993 994 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 995 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 996 return 0; 997 } 998 999 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1000 range->ncprange_ip6width = 0; 1001 else 1002 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1003 return 1; 1004 #endif 1005 } 1006 1007 return 0; 1008 } 1009