ncpaddr.c revision 96732
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: head/usr.sbin/ppp/ncpaddr.c 96732 2002-05-16 14:47:19Z brian $ 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#define NCP_ASCIIBUFFERSIZE 52 80 81static struct in_addr 82bits2mask4(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 99static int 100mask42bits(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 118static struct in6_addr 119bits2mask6(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 140static int 141mask62bits(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; 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; c < masks + sizeof masks; c++) 153 if (*c == *p) { 154 masklen += c - masks; 155 break; 156 } 157 } 158 159 return masklen; 160} 161 162static void 163adjust_linklocal(struct sockaddr_in6 *sin6) 164{ 165 /* XXX: ?????!?!?!!!!! This is horrible ! */ 166 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 167 IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 168 sin6->sin6_scope_id = 169 ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 170 *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 171 } 172} 173#endif 174 175void 176ncpaddr_init(struct ncpaddr *addr) 177{ 178 addr->ncpaddr_family = AF_UNSPEC; 179} 180 181int 182ncpaddr_isset(const struct ncpaddr *addr) 183{ 184 return addr->ncpaddr_family != AF_UNSPEC; 185} 186 187int 188ncpaddr_isdefault(const struct ncpaddr *addr) 189{ 190 switch (addr->ncpaddr_family) { 191 case AF_INET: 192 if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 193 return 1; 194 break; 195 196#ifndef NOINET6 197 case AF_INET6: 198 if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 199 return 1; 200 break; 201#endif 202 } 203 204 return 0; 205} 206 207int 208ncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 209{ 210 if (addr->ncpaddr_family != cmp->ncpaddr_family) 211 return 0; 212 213 switch (addr->ncpaddr_family) { 214 case AF_INET: 215 return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 216 217#ifndef NOINET6 218 case AF_INET6: 219 return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 220 sizeof addr->ncpaddr_ip6addr); 221#endif 222 223 case AF_UNSPEC: 224 return 1; 225 } 226 227 return 0; 228} 229 230void 231ncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 232{ 233 switch (from->ncpaddr_family) { 234 case AF_INET: 235 addr->ncpaddr_family = AF_INET; 236 addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 237 break; 238#ifndef NOINET6 239 case AF_INET6: 240 addr->ncpaddr_family = AF_INET6; 241 addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 242 break; 243#endif 244 default: 245 addr->ncpaddr_family = AF_UNSPEC; 246 } 247} 248 249void 250ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 251{ 252 addr->ncpaddr_family = AF_INET; 253 addr->ncpaddr_ip4addr.s_addr = ip; 254} 255 256int 257ncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 258{ 259 if (addr->ncpaddr_family != AF_INET) 260 return 0; 261 *ip = addr->ncpaddr_ip4addr.s_addr; 262 return 1; 263} 264 265void 266ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 267{ 268 addr->ncpaddr_family = AF_INET; 269 addr->ncpaddr_ip4addr = ip; 270} 271 272int 273ncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 274{ 275 if (addr->ncpaddr_family != AF_INET) 276 return 0; 277 *ip = addr->ncpaddr_ip4addr; 278 return 1; 279} 280 281#ifndef NOINET6 282void 283ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 284{ 285 addr->ncpaddr_family = AF_INET6; 286 addr->ncpaddr_ip6addr = *ip6; 287} 288 289int 290ncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 291{ 292 if (addr->ncpaddr_family != AF_INET6) 293 return 0; 294 *ip6 = addr->ncpaddr_ip6addr; 295 return 1; 296} 297#endif 298 299void 300ncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 301{ 302 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 303#ifndef NOINET6 304 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 305#endif 306 307 memset(host, '\0', sizeof(*host)); 308 309 switch (addr->ncpaddr_family) { 310 case AF_INET: 311 host4->sin_family = AF_INET; 312 host4->sin_len = sizeof(*host4); 313 host4->sin_addr = addr->ncpaddr_ip4addr; 314 break; 315 316#ifndef NOINET6 317 case AF_INET6: 318 host6->sin6_family = AF_INET6; 319 host6->sin6_len = sizeof(*host6); 320 host6->sin6_addr = addr->ncpaddr_ip6addr; 321 break; 322#endif 323 324 default: 325 host->ss_family = AF_UNSPEC; 326 break; 327 } 328} 329 330void 331ncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 332{ 333 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 334#ifndef NOINET6 335 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 336#endif 337 338 switch (host->sa_family) { 339 case AF_INET: 340 addr->ncpaddr_family = AF_INET; 341 addr->ncpaddr_ip4addr = host4->sin_addr; 342 break; 343 344#ifndef NOINET6 345 case AF_INET6: 346 if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 347 addr->ncpaddr_family = AF_INET; 348 addr->ncpaddr_ip4addr.s_addr = 349 *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 350 } else { 351 addr->ncpaddr_family = AF_INET6; 352 addr->ncpaddr_ip6addr = host6->sin6_addr; 353 } 354 break; 355#endif 356 357 default: 358 addr->ncpaddr_family = AF_UNSPEC; 359 } 360} 361 362static char * 363ncpaddr_ntowa(const struct ncpaddr *addr) 364{ 365 static char res[NCP_ASCIIBUFFERSIZE]; 366#ifndef NOINET6 367 struct sockaddr_in6 sin6; 368#endif 369 370 switch (addr->ncpaddr_family) { 371 case AF_INET: 372 snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 373 return res; 374 375#ifndef NOINET6 376 case AF_INET6: 377 memset(&sin6, '\0', sizeof(sin6)); 378 sin6.sin6_len = sizeof(sin6); 379 sin6.sin6_family = AF_INET6; 380 sin6.sin6_addr = addr->ncpaddr_ip6addr; 381 adjust_linklocal(&sin6); 382 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 383 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 384 break; 385 386 return res; 387#endif 388 } 389 390 snprintf(res, sizeof res, "<AF_UNSPEC>"); 391 return res; 392} 393 394const char * 395ncpaddr_ntoa(const struct ncpaddr *addr) 396{ 397 return ncpaddr_ntowa(addr); 398} 399 400 401int 402ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 403{ 404 struct ncprange range; 405 406 if (!ncprange_aton(&range, ncp, data)) 407 return 0; 408 409 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 410 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 411 return 0; 412 } 413 414#ifndef NOINET6 415 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 416 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 417 return 0; 418 } 419#endif 420 421 switch (range.ncprange_family) { 422 case AF_INET: 423 addr->ncpaddr_family = range.ncprange_family; 424 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 425 return 1; 426 427#ifndef NOINET6 428 case AF_INET6: 429 addr->ncpaddr_family = range.ncprange_family; 430 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 431 return 1; 432#endif 433 } 434 435 return 0; 436} 437 438void 439ncprange_init(struct ncprange *range) 440{ 441 range->ncprange_family = AF_UNSPEC; 442} 443 444int 445ncprange_isset(const struct ncprange *range) 446{ 447 return range->ncprange_family != AF_UNSPEC; 448} 449 450int 451ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 452{ 453 if (range->ncprange_family != cmp->ncprange_family) 454 return 0; 455 456 switch (range->ncprange_family) { 457 case AF_INET: 458 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 459 return 0; 460 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 461 462#ifndef NOINET6 463 case AF_INET6: 464 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 465 return 0; 466 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 467 sizeof range->ncprange_ip6addr); 468#endif 469 470 case AF_UNSPEC: 471 return 1; 472 } 473 474 return 0; 475} 476 477int 478ncprange_isdefault(const struct ncprange *range) 479{ 480 switch (range->ncprange_family) { 481 case AF_INET: 482 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 483 return 1; 484 break; 485 486#ifndef NOINET6 487 case AF_INET6: 488 if (range->ncprange_ip6width == 0 && 489 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 490 return 1; 491 break; 492#endif 493 } 494 495 return 0; 496} 497 498void 499ncprange_setdefault(struct ncprange *range, int af) 500{ 501 memset(range, '\0', sizeof *range); 502 range->ncprange_family = af; 503} 504 505int 506ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 507{ 508#ifndef NOINET6 509 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 510 const u_char *addrp, *rangep; 511 int bits; 512#endif 513 514 if (range->ncprange_family != addr->ncpaddr_family) 515 return 0; 516 517 switch (range->ncprange_family) { 518 case AF_INET: 519 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 520 range->ncprange_ip4mask.s_addr); 521 522#ifndef NOINET6 523 case AF_INET6: 524 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 525 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 526 527 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 528 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 529 return 0; 530 531 return 1; 532#endif 533 } 534 535 return 0; 536} 537 538int 539ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 540{ 541 switch (range->ncprange_family) { 542 case AF_INET: 543 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 544 range->ncprange_ip4mask.s_addr); 545 } 546 547 return 0; 548} 549 550void 551ncprange_copy(struct ncprange *range, const struct ncprange *from) 552{ 553 switch (from->ncprange_family) { 554 case AF_INET: 555 range->ncprange_family = AF_INET; 556 range->ncprange_ip4addr = from->ncprange_ip4addr; 557 range->ncprange_ip4mask = from->ncprange_ip4mask; 558 range->ncprange_ip4width = from->ncprange_ip4width; 559 break; 560 561#ifndef NOINET6 562 case AF_INET6: 563 range->ncprange_family = AF_INET6; 564 range->ncprange_ip6addr = from->ncprange_ip6addr; 565 range->ncprange_ip6width = from->ncprange_ip6width; 566 break; 567#endif 568 569 default: 570 range->ncprange_family = AF_UNSPEC; 571 } 572} 573 574void 575ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 576{ 577 ncprange_sethost(range, addr); 578 ncprange_setwidth(range, width); 579} 580 581void 582ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 583{ 584 switch (from->ncpaddr_family) { 585 case AF_INET: 586 range->ncprange_family = AF_INET; 587 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 588 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 589 range->ncprange_ip4mask.s_addr = INADDR_ANY; 590 range->ncprange_ip4width = 0; 591 } else { 592 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 593 range->ncprange_ip4width = 32; 594 } 595 break; 596 597#ifndef NOINET6 598 case AF_INET6: 599 range->ncprange_family = AF_INET6; 600 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 601 range->ncprange_ip6width = 128; 602 break; 603#endif 604 605 default: 606 range->ncprange_family = AF_UNSPEC; 607 } 608} 609 610int 611ncprange_ishost(const struct ncprange *range) 612{ 613 switch (range->ncprange_family) { 614 case AF_INET: 615 return range->ncprange_ip4width == 32; 616#ifndef NOINET6 617 case AF_INET6: 618 return range->ncprange_ip6width == 128; 619#endif 620 } 621 622 return (0); 623} 624 625int 626ncprange_setwidth(struct ncprange *range, int width) 627{ 628 switch (range->ncprange_family) { 629 case AF_INET: 630 if (width < 0 || width > 32) 631 break; 632 range->ncprange_ip4width = width; 633 range->ncprange_ip4mask = bits2mask4(width); 634 break; 635 636#ifndef NOINET6 637 case AF_INET6: 638 if (width < 0 || width > 128) 639 break; 640 range->ncprange_ip6width = width; 641 break; 642#endif 643 644 case AF_UNSPEC: 645 return 1; 646 } 647 648 return 0; 649} 650 651void 652ncprange_setip4host(struct ncprange *range, struct in_addr from) 653{ 654 range->ncprange_family = AF_INET; 655 range->ncprange_ip4addr = from; 656 if (from.s_addr == INADDR_ANY) { 657 range->ncprange_ip4mask.s_addr = INADDR_ANY; 658 range->ncprange_ip4width = 0; 659 } else { 660 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 661 range->ncprange_ip4width = 32; 662 } 663} 664 665void 666ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 667{ 668 range->ncprange_family = AF_INET; 669 range->ncprange_ip4addr = from; 670 range->ncprange_ip4mask = msk; 671 range->ncprange_ip4width = mask42bits(msk); 672} 673 674 675int 676ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 677{ 678 if (range->ncprange_family != AF_INET) 679 return 0; 680 range->ncprange_ip4mask = mask; 681 range->ncprange_ip4width = mask42bits(mask); 682 return 1; 683} 684 685void 686ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 687 const struct sockaddr *mask) 688{ 689 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 690 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 691#ifndef NOINET6 692 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 693 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 694#endif 695 696 switch (host->sa_family) { 697 case AF_INET: 698 range->ncprange_family = AF_INET; 699 range->ncprange_ip4addr = host4->sin_addr; 700 if (host4->sin_addr.s_addr == INADDR_ANY) { 701 range->ncprange_ip4mask.s_addr = INADDR_ANY; 702 range->ncprange_ip4width = 0; 703 } else if (mask4 && mask4->sin_family == AF_INET) { 704 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 705 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 706 } else { 707 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 708 range->ncprange_ip4width = 32; 709 } 710 break; 711 712#ifndef NOINET6 713 case AF_INET6: 714 range->ncprange_family = AF_INET6; 715 range->ncprange_ip6addr = host6->sin6_addr; 716 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 717 break; 718#endif 719 720 default: 721 range->ncprange_family = AF_UNSPEC; 722 } 723} 724 725void 726ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 727 struct sockaddr_storage *mask) 728{ 729 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 730 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 731#ifndef NOINET6 732 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 733 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 734#endif 735 736 memset(host, '\0', sizeof(*host)); 737 if (mask) 738 memset(mask, '\0', sizeof(*mask)); 739 740 switch (range->ncprange_family) { 741 case AF_INET: 742 host4->sin_family = AF_INET; 743 host4->sin_len = sizeof(*host4); 744 host4->sin_addr = range->ncprange_ip4addr; 745 if (mask4) { 746 mask4->sin_family = AF_INET; 747 mask4->sin_len = sizeof(*host4); 748 mask4->sin_addr = range->ncprange_ip4mask; 749 } 750 break; 751 752#ifndef NOINET6 753 case AF_INET6: 754 host6->sin6_family = AF_INET6; 755 host6->sin6_len = sizeof(*host6); 756 host6->sin6_addr = range->ncprange_ip6addr; 757 if (mask6) { 758 mask6->sin6_family = AF_INET6; 759 mask6->sin6_len = sizeof(*host6); 760 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 761 } 762 break; 763#endif 764 765 default: 766 host->ss_family = AF_UNSPEC; 767 if (mask) 768 mask->ss_family = AF_UNSPEC; 769 break; 770 } 771} 772 773int 774ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 775{ 776 switch (range->ncprange_family) { 777 case AF_INET: 778 addr->ncpaddr_family = AF_INET; 779 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 780 return 1; 781#ifndef NOINET6 782 case AF_INET6: 783 addr->ncpaddr_family = AF_INET6; 784 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 785 return 1; 786#endif 787 } 788 789 return 0; 790} 791 792int 793ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 794{ 795 if (range->ncprange_family != AF_INET) 796 return 0; 797 798 *addr = range->ncprange_ip4addr; 799 return 1; 800} 801 802int 803ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 804{ 805 switch (range->ncprange_family) { 806 case AF_INET: 807 *mask = range->ncprange_ip4mask; 808 return 1; 809 } 810 811 return 0; 812} 813 814int 815ncprange_getwidth(const struct ncprange *range, int *width) 816{ 817 switch (range->ncprange_family) { 818 case AF_INET: 819 *width = range->ncprange_ip4width; 820 return 1; 821#ifndef NOINET6 822 case AF_INET6: 823 *width = range->ncprange_ip6width; 824 return 1; 825#endif 826 } 827 828 return 0; 829} 830 831const char * 832ncprange_ntoa(const struct ncprange *range) 833{ 834 char *res; 835 struct ncpaddr addr; 836 int len; 837 838 if (!ncprange_getaddr(range, &addr)) 839 return "<AF_UNSPEC>"; 840 841 res = ncpaddr_ntowa(&addr); 842 len = strlen(res); 843 if (len >= NCP_ASCIIBUFFERSIZE - 1) 844 return res; 845 846 switch (range->ncprange_family) { 847 case AF_INET: 848 if (range->ncprange_ip4width == -1) { 849 /* A non-contiguous mask */ 850 for (; len >= 3; res[len -= 2] = '\0') 851 if (strcmp(res + len - 2, ".0")) 852 break; 853 snprintf(res + len, sizeof res - len, "&0x%08lx", 854 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 855 } else if (range->ncprange_ip4width < 32) 856 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 857 858 return res; 859 860#ifndef NOINET6 861 case AF_INET6: 862 if (range->ncprange_ip6width != 128) 863 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 864 865 return res; 866#endif 867 } 868 869 return "<AF_UNSPEC>"; 870} 871 872#ifndef NOINET6 873int 874ncprange_scopeid(const struct ncprange *range) 875{ 876 const struct in6_addr *sin6; 877 int scopeid = -1; 878 879 if (range->ncprange_family == AF_INET6) { 880 sin6 = &range->ncprange_ip6addr; 881 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 882 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 883 scopeid = -1; 884 } 885 886 return scopeid; 887} 888#endif 889 890int 891ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 892{ 893 int bits, len; 894 char *wp; 895 const char *cp; 896 char *s; 897 898 len = strcspn(data, "/"); 899 900 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 901 range->ncprange_family = AF_INET; 902 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 903 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 904 range->ncprange_ip4width = 32; 905 return 1; 906#ifndef NOINET6 907 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 908 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 909 return 1; 910#endif 911 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 912 range->ncprange_family = AF_INET; 913 range->ncprange_ip4addr = ncp->ipcp.my_ip; 914 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 915 range->ncprange_ip4width = 32; 916 return 1; 917#ifndef NOINET6 918 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 919 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 920 return 1; 921#endif 922 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 923 range->ncprange_family = AF_INET; 924 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 925 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 926 range->ncprange_ip4width = 32; 927 return 1; 928 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 929 range->ncprange_family = AF_INET; 930 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 931 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 932 range->ncprange_ip4width = 32; 933 return 1; 934 } 935 936 s = (char *)alloca(len + 1); 937 strncpy(s, data, len); 938 s[len] = '\0'; 939 bits = -1; 940 941 if (data[len] != '\0') { 942 bits = strtol(data + len + 1, &wp, 0); 943 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 944 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 945 return 0; 946 } 947 } 948 949 if ((cp = strchr(data, ':')) == NULL) { 950 range->ncprange_family = AF_INET; 951 952 range->ncprange_ip4addr = GetIpAddr(s); 953 954 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 955 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 956 return 0; 957 } 958 959 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 960 range->ncprange_ip4mask.s_addr = INADDR_ANY; 961 range->ncprange_ip4width = 0; 962 } else if (bits == -1) { 963 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 964 range->ncprange_ip4width = 32; 965 } else if (bits > 32) { 966 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 967 return 0; 968 } else { 969 range->ncprange_ip4mask = bits2mask4(bits); 970 range->ncprange_ip4width = bits; 971 } 972 973 return 1; 974#ifndef NOINET6 975 } else if (strchr(cp + 1, ':') != NULL) { 976 range->ncprange_family = AF_INET6; 977 978 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 979 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 980 return 0; 981 } 982 983 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 984 range->ncprange_ip6width = 0; 985 else 986 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 987 return 1; 988#endif 989 } 990 991 return 0; 992} 993