ncpaddr.c revision 102558
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 102558 2002-08-29 02:44:58Z 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 0 167 /* 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#endif 179} 180#endif 181 182void 183ncpaddr_init(struct ncpaddr *addr) 184{ 185 addr->ncpaddr_family = AF_UNSPEC; 186} 187 188int 189ncpaddr_isset(const struct ncpaddr *addr) 190{ 191 return addr->ncpaddr_family != AF_UNSPEC; 192} 193 194int 195ncpaddr_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 214int 215ncpaddr_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 237void 238ncpaddr_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 256void 257ncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 258{ 259 addr->ncpaddr_family = AF_INET; 260 addr->ncpaddr_ip4addr.s_addr = ip; 261} 262 263int 264ncpaddr_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 272void 273ncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 274{ 275 addr->ncpaddr_family = AF_INET; 276 addr->ncpaddr_ip4addr = ip; 277} 278 279int 280ncpaddr_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 289void 290ncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 291{ 292 addr->ncpaddr_family = AF_INET6; 293 addr->ncpaddr_ip6addr = *ip6; 294} 295 296int 297ncpaddr_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 306void 307ncpaddr_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 337void 338ncpaddr_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 369static char * 370ncpaddr_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 adjust_linklocal(&sin6); 389#ifdef NI_WITHSCOPEID 390 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 391 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 392#else 393 if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 394 NULL, 0, NI_NUMERICHOST) != 0) 395#endif 396 break; 397 398 return res; 399#endif 400 } 401 402 snprintf(res, sizeof res, "<AF_UNSPEC>"); 403 return res; 404} 405 406const char * 407ncpaddr_ntoa(const struct ncpaddr *addr) 408{ 409 return ncpaddr_ntowa(addr); 410} 411 412 413int 414ncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 415{ 416 struct ncprange range; 417 418 if (!ncprange_aton(&range, ncp, data)) 419 return 0; 420 421 if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32) { 422 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 423 return 0; 424 } 425 426#ifndef NOINET6 427 if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128) { 428 log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 429 return 0; 430 } 431#endif 432 433 switch (range.ncprange_family) { 434 case AF_INET: 435 addr->ncpaddr_family = range.ncprange_family; 436 addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 437 return 1; 438 439#ifndef NOINET6 440 case AF_INET6: 441 addr->ncpaddr_family = range.ncprange_family; 442 addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 443 return 1; 444#endif 445 } 446 447 return 0; 448} 449 450void 451ncprange_init(struct ncprange *range) 452{ 453 range->ncprange_family = AF_UNSPEC; 454} 455 456int 457ncprange_isset(const struct ncprange *range) 458{ 459 return range->ncprange_family != AF_UNSPEC; 460} 461 462int 463ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 464{ 465 if (range->ncprange_family != cmp->ncprange_family) 466 return 0; 467 468 switch (range->ncprange_family) { 469 case AF_INET: 470 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 471 return 0; 472 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 473 474#ifndef NOINET6 475 case AF_INET6: 476 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 477 return 0; 478 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 479 sizeof range->ncprange_ip6addr); 480#endif 481 482 case AF_UNSPEC: 483 return 1; 484 } 485 486 return 0; 487} 488 489int 490ncprange_isdefault(const struct ncprange *range) 491{ 492 switch (range->ncprange_family) { 493 case AF_INET: 494 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 495 return 1; 496 break; 497 498#ifndef NOINET6 499 case AF_INET6: 500 if (range->ncprange_ip6width == 0 && 501 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 502 return 1; 503 break; 504#endif 505 } 506 507 return 0; 508} 509 510void 511ncprange_setdefault(struct ncprange *range, int af) 512{ 513 memset(range, '\0', sizeof *range); 514 range->ncprange_family = af; 515} 516 517int 518ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 519{ 520#ifndef NOINET6 521 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 522 const u_char *addrp, *rangep; 523 int bits; 524#endif 525 526 if (range->ncprange_family != addr->ncpaddr_family) 527 return 0; 528 529 switch (range->ncprange_family) { 530 case AF_INET: 531 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 532 range->ncprange_ip4mask.s_addr); 533 534#ifndef NOINET6 535 case AF_INET6: 536 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 537 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 538 539 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 540 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 541 return 0; 542 543 return 1; 544#endif 545 } 546 547 return 0; 548} 549 550int 551ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 552{ 553 switch (range->ncprange_family) { 554 case AF_INET: 555 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 556 range->ncprange_ip4mask.s_addr); 557 } 558 559 return 0; 560} 561 562void 563ncprange_copy(struct ncprange *range, const struct ncprange *from) 564{ 565 switch (from->ncprange_family) { 566 case AF_INET: 567 range->ncprange_family = AF_INET; 568 range->ncprange_ip4addr = from->ncprange_ip4addr; 569 range->ncprange_ip4mask = from->ncprange_ip4mask; 570 range->ncprange_ip4width = from->ncprange_ip4width; 571 break; 572 573#ifndef NOINET6 574 case AF_INET6: 575 range->ncprange_family = AF_INET6; 576 range->ncprange_ip6addr = from->ncprange_ip6addr; 577 range->ncprange_ip6width = from->ncprange_ip6width; 578 break; 579#endif 580 581 default: 582 range->ncprange_family = AF_UNSPEC; 583 } 584} 585 586void 587ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 588{ 589 ncprange_sethost(range, addr); 590 ncprange_setwidth(range, width); 591} 592 593void 594ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 595{ 596 switch (from->ncpaddr_family) { 597 case AF_INET: 598 range->ncprange_family = AF_INET; 599 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 600 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 601 range->ncprange_ip4mask.s_addr = INADDR_ANY; 602 range->ncprange_ip4width = 0; 603 } else { 604 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 605 range->ncprange_ip4width = 32; 606 } 607 break; 608 609#ifndef NOINET6 610 case AF_INET6: 611 range->ncprange_family = AF_INET6; 612 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 613 range->ncprange_ip6width = 128; 614 break; 615#endif 616 617 default: 618 range->ncprange_family = AF_UNSPEC; 619 } 620} 621 622int 623ncprange_ishost(const struct ncprange *range) 624{ 625 switch (range->ncprange_family) { 626 case AF_INET: 627 return range->ncprange_ip4width == 32; 628#ifndef NOINET6 629 case AF_INET6: 630 return range->ncprange_ip6width == 128; 631#endif 632 } 633 634 return (0); 635} 636 637int 638ncprange_setwidth(struct ncprange *range, int width) 639{ 640 switch (range->ncprange_family) { 641 case AF_INET: 642 if (width < 0 || width > 32) 643 break; 644 range->ncprange_ip4width = width; 645 range->ncprange_ip4mask = bits2mask4(width); 646 break; 647 648#ifndef NOINET6 649 case AF_INET6: 650 if (width < 0 || width > 128) 651 break; 652 range->ncprange_ip6width = width; 653 break; 654#endif 655 656 case AF_UNSPEC: 657 return 1; 658 } 659 660 return 0; 661} 662 663void 664ncprange_setip4host(struct ncprange *range, struct in_addr from) 665{ 666 range->ncprange_family = AF_INET; 667 range->ncprange_ip4addr = from; 668 if (from.s_addr == INADDR_ANY) { 669 range->ncprange_ip4mask.s_addr = INADDR_ANY; 670 range->ncprange_ip4width = 0; 671 } else { 672 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 673 range->ncprange_ip4width = 32; 674 } 675} 676 677void 678ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 679{ 680 range->ncprange_family = AF_INET; 681 range->ncprange_ip4addr = from; 682 range->ncprange_ip4mask = msk; 683 range->ncprange_ip4width = mask42bits(msk); 684} 685 686 687int 688ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 689{ 690 if (range->ncprange_family != AF_INET) 691 return 0; 692 range->ncprange_ip4mask = mask; 693 range->ncprange_ip4width = mask42bits(mask); 694 return 1; 695} 696 697void 698ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 699 const struct sockaddr *mask) 700{ 701 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 702 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 703#ifndef NOINET6 704 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 705 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 706#endif 707 708 switch (host->sa_family) { 709 case AF_INET: 710 range->ncprange_family = AF_INET; 711 range->ncprange_ip4addr = host4->sin_addr; 712 if (host4->sin_addr.s_addr == INADDR_ANY) { 713 range->ncprange_ip4mask.s_addr = INADDR_ANY; 714 range->ncprange_ip4width = 0; 715 } else if (mask4 && mask4->sin_family == AF_INET) { 716 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 717 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 718 } else { 719 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 720 range->ncprange_ip4width = 32; 721 } 722 break; 723 724#ifndef NOINET6 725 case AF_INET6: 726 range->ncprange_family = AF_INET6; 727 range->ncprange_ip6addr = host6->sin6_addr; 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 737void 738ncprange_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 785int 786ncprange_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 804int 805ncprange_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 814int 815ncprange_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 826int 827ncprange_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 843const char * 844ncprange_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 885int 886ncprange_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 902int 903ncprange_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 ncprange_sethost(range, &ncp->ipv6cp.hisaddr); 921 return 1; 922#endif 923 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 924 range->ncprange_family = AF_INET; 925 range->ncprange_ip4addr = ncp->ipcp.my_ip; 926 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 927 range->ncprange_ip4width = 32; 928 return 1; 929#ifndef NOINET6 930 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 931 ncprange_sethost(range, &ncp->ipv6cp.myaddr); 932 return 1; 933#endif 934 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 935 range->ncprange_family = AF_INET; 936 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 937 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 938 range->ncprange_ip4width = 32; 939 return 1; 940 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 941 range->ncprange_family = AF_INET; 942 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 943 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 944 range->ncprange_ip4width = 32; 945 return 1; 946 } 947 948 s = (char *)alloca(len + 1); 949 strncpy(s, data, len); 950 s[len] = '\0'; 951 bits = -1; 952 953 if (data[len] != '\0') { 954 bits = strtol(data + len + 1, &wp, 0); 955 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 956 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 957 return 0; 958 } 959 } 960 961 if ((cp = strchr(data, ':')) == NULL) { 962 range->ncprange_family = AF_INET; 963 964 range->ncprange_ip4addr = GetIpAddr(s); 965 966 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 967 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 968 return 0; 969 } 970 971 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 972 range->ncprange_ip4mask.s_addr = INADDR_ANY; 973 range->ncprange_ip4width = 0; 974 } else if (bits == -1) { 975 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 976 range->ncprange_ip4width = 32; 977 } else if (bits > 32) { 978 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 979 return 0; 980 } else { 981 range->ncprange_ip4mask = bits2mask4(bits); 982 range->ncprange_ip4width = bits; 983 } 984 985 return 1; 986#ifndef NOINET6 987 } else if (strchr(cp + 1, ':') != NULL) { 988 range->ncprange_family = AF_INET6; 989 990 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 991 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 992 return 0; 993 } 994 995 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 996 range->ncprange_ip6width = 0; 997 else 998 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 999 return 1; 1000#endif 1001 } 1002 1003 return 0; 1004} 1005