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