ncpaddr.c revision 134789
1142425Snectar/*- 2142425Snectar * Copyright (c) 2001 Brian Somers <brian@Awfulhak.org> 3142425Snectar * All rights reserved. 4142425Snectar * 5142425Snectar * Redistribution and use in source and binary forms, with or without 6142425Snectar * modification, are permitted provided that the following conditions 7142425Snectar * are met: 8142425Snectar * 1. Redistributions of source code must retain the above copyright 9142425Snectar * notice, this list of conditions and the following disclaimer. 10142425Snectar * 2. Redistributions in binary form must reproduce the above copyright 11142425Snectar * notice, this list of conditions and the following disclaimer in the 12142425Snectar * documentation and/or other materials provided with the distribution. 13142425Snectar * 14142425Snectar * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15142425Snectar * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16142425Snectar * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17142425Snectar * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18142425Snectar * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19142425Snectar * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20142425Snectar * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21142425Snectar * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22160814Ssimon * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23238405Sjkim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24238405Sjkim * SUCH DAMAGE. 25238405Sjkim * 26142425Snectar * $FreeBSD: head/usr.sbin/ppp/ncpaddr.c 134789 2004-09-05 01:46:52Z brian $ 27142425Snectar */ 28160814Ssimon 29238405Sjkim#include <sys/types.h> 30238405Sjkim#include <sys/socket.h> 31238405Sjkim#ifdef __OpenBSD__ 32142425Snectar#include <net/if_types.h> 33142425Snectar#include <net/route.h> 34142425Snectar#endif 35142425Snectar#include <netinet/in.h> 36142425Snectar#include <netinet/in_systm.h> 37142425Snectar#include <netinet/ip.h> 38142425Snectar#include <arpa/inet.h> 39142425Snectar#include <sys/un.h> 40142425Snectar 41142425Snectar#include <netdb.h> 42142425Snectar#include <stdio.h> 43142425Snectar#include <stdlib.h> 44142425Snectar#include <string.h> 45142425Snectar#include <termios.h> 46238405Sjkim 47142425Snectar#include "log.h" 48142425Snectar#include "ncpaddr.h" 49142425Snectar#include "timer.h" 50142425Snectar#include "fsm.h" 51142425Snectar#include "defs.h" 52142425Snectar#include "slcompress.h" 53142425Snectar#include "iplist.h" 54142425Snectar#include "throughput.h" 55142425Snectar#include "mbuf.h" 56142425Snectar#include "ipcp.h" 57142425Snectar#include "descriptor.h" 58142425Snectar#include "layer.h" 59160814Ssimon#include "lqr.h" 60160814Ssimon#include "hdlc.h" 61142425Snectar#include "lcp.h" 62142425Snectar#include "ccp.h" 63142425Snectar#include "link.h" 64142425Snectar#include "mp.h" 65142425Snectar#include "ipv6cp.h" 66142425Snectar#include "ncp.h" 67142425Snectar 68142425Snectar 69142425Snectar#define ncprange_ip4addr u.ip4.ipaddr 70142425Snectar#define ncprange_ip4mask u.ip4.mask 71142425Snectar#define ncprange_ip4width u.ip4.width 72142425Snectar#define ncpaddr_ip4addr u.ip4addr 73142425Snectar#ifndef NOINET6 74296341Sdelphij#define ncprange_ip6addr u.ip6.ipaddr 75296341Sdelphij#define ncprange_ip6width u.ip6.width 76142425Snectar#define ncpaddr_ip6addr u.ip6addr 77160814Ssimon#endif 78142425Snectar 79142425Snectar#define NCP_ASCIIBUFFERSIZE 52 80142425Snectar 81142425Snectarstatic struct in_addr 82142425Snectarbits2mask4(int bits) 83142425Snectar{ 84142425Snectar struct in_addr result; 85142425Snectar u_int32_t bit = 0x80000000; 86142425Snectar 87142425Snectar result.s_addr = 0; 88142425Snectar 89194206Ssimon while (bits) { 90194206Ssimon result.s_addr |= bit; 91194206Ssimon bit >>= 1; 92194206Ssimon bits--; 93194206Ssimon } 94194206Ssimon 95238405Sjkim result.s_addr = htonl(result.s_addr); 96238405Sjkim return result; 97238405Sjkim} 98238405Sjkim 99238405Sjkimstatic int 100238405Sjkimmask42bits(struct in_addr mask) 101238405Sjkim{ 102194206Ssimon u_int32_t msk = ntohl(mask.s_addr); 103194206Ssimon u_int32_t tst; 104194206Ssimon int ret; 105194206Ssimon 106194206Ssimon for (ret = 32, tst = 1; tst; ret--, tst <<= 1) 107142425Snectar if (msk & tst) 108238405Sjkim break; 109238405Sjkim 110238405Sjkim for (tst <<= 1; tst; tst <<= 1) 111238405Sjkim if (!(msk & tst)) 112238405Sjkim break; 113238405Sjkim 114238405Sjkim return tst ? -1 : ret; 115238405Sjkim} 116160814Ssimon 117194206Ssimon#ifndef NOINET6 118238405Sjkimstatic struct in6_addr 119194206Ssimonbits2mask6(int bits) 120194206Ssimon{ 121238405Sjkim struct in6_addr result; 122205128Ssimon u_int32_t bit = 0x80; 123160814Ssimon u_char *c = result.s6_addr; 124160814Ssimon 125160814Ssimon memset(&result, '\0', sizeof result); 126194206Ssimon 127238405Sjkim while (bits) { 128238405Sjkim if (bit == 0) { 129238405Sjkim bit = 0x80; 130238405Sjkim c++; 131194206Ssimon } 132194206Ssimon *c |= bit; 133194206Ssimon bit >>= 1; 134194206Ssimon bits--; 135194206Ssimon } 136194206Ssimon 137238405Sjkim return result; 138238405Sjkim} 139142425Snectar 140194206Ssimonstatic int 141194206Ssimonmask62bits(const struct in6_addr *mask) 142194206Ssimon{ 143194206Ssimon const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 144194206Ssimon const u_char *c, *p, *end; 145194206Ssimon int masklen, m; 146194206Ssimon 147194206Ssimon p = (const u_char *)mask; 148194206Ssimon for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 149142425Snectar masklen += 8; 150238405Sjkim 151238405Sjkim if (p < end) { 152238405Sjkim for (c = masks, m = 0; c < masks + sizeof masks; c++, m++) 153238405Sjkim if (*c == *p) { 154238405Sjkim masklen += m; 155238405Sjkim break; 156238405Sjkim } 157238405Sjkim } 158194206Ssimon 159194206Ssimon return masklen; 160194206Ssimon} 161194206Ssimon 162194206Ssimon#if 0 163238405Sjkimstatic void 164238405Sjkimadjust_linklocal(struct sockaddr_in6 *sin6) 165238405Sjkim{ 166238405Sjkim /* XXX: ?????!?!?!!!!! This is horrible ! */ 167238405Sjkim /* 168238405Sjkim * The kernel does not understand sin6_scope_id for routing at this moment. 169238405Sjkim * We should rather keep the embedded ID. 170238405Sjkim * jinmei@kame.net, 20011026 171194206Ssimon */ 172194206Ssimon if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) || 173194206Ssimon IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr)) { 174194206Ssimon sin6->sin6_scope_id = 175194206Ssimon ntohs(*(u_short *)&sin6->sin6_addr.s6_addr[2]); 176142425Snectar *(u_short *)&sin6->sin6_addr.s6_addr[2] = 0; 177238405Sjkim } 178238405Sjkim} 179238405Sjkim#endif 180238405Sjkim#endif 181238405Sjkim 182238405Sjkimvoid 183238405Sjkimncpaddr_init(struct ncpaddr *addr) 184238405Sjkim{ 185194206Ssimon addr->ncpaddr_family = AF_UNSPEC; 186194206Ssimon} 187194206Ssimon 188194206Ssimonint 189194206Ssimonncpaddr_isset(const struct ncpaddr *addr) 190194206Ssimon{ 191238405Sjkim return addr->ncpaddr_family != AF_UNSPEC; 192238405Sjkim} 193142425Snectar 194194206Ssimonint 195194206Ssimonncpaddr_isdefault(const struct ncpaddr *addr) 196194206Ssimon{ 197194206Ssimon switch (addr->ncpaddr_family) { 198194206Ssimon case AF_INET: 199194206Ssimon if (addr->ncpaddr_ip4addr.s_addr == INADDR_ANY) 200194206Ssimon return 1; 201194206Ssimon break; 202194206Ssimon 203194206Ssimon#ifndef NOINET6 204238405Sjkim case AF_INET6: 205238405Sjkim if (IN6_IS_ADDR_UNSPECIFIED(&addr->ncpaddr_ip6addr)) 206238405Sjkim return 1; 207238405Sjkim break; 208238405Sjkim#endif 209238405Sjkim } 210238405Sjkim 211238405Sjkim return 0; 212194206Ssimon} 213194206Ssimon 214194206Ssimonint 215194206Ssimonncpaddr_equal(const struct ncpaddr *addr, const struct ncpaddr *cmp) 216194206Ssimon{ 217194206Ssimon if (addr->ncpaddr_family != cmp->ncpaddr_family) 218238405Sjkim return 0; 219238405Sjkim 220142425Snectar switch (addr->ncpaddr_family) { 221194206Ssimon case AF_INET: 222194206Ssimon return addr->ncpaddr_ip4addr.s_addr == cmp->ncpaddr_ip4addr.s_addr; 223194206Ssimon 224194206Ssimon#ifndef NOINET6 225160814Ssimon case AF_INET6: 226160814Ssimon return !memcmp(&addr->ncpaddr_ip6addr, &cmp->ncpaddr_ip6addr, 227160814Ssimon sizeof addr->ncpaddr_ip6addr); 228142425Snectar#endif 229160814Ssimon 230160814Ssimon case AF_UNSPEC: 231160814Ssimon return 1; 232238405Sjkim } 233238405Sjkim 234142425Snectar return 0; 235142425Snectar} 236142425Snectar 237142425Snectarvoid 238160814Ssimonncpaddr_copy(struct ncpaddr *addr, const struct ncpaddr *from) 239160814Ssimon{ 240160814Ssimon switch (from->ncpaddr_family) { 241160814Ssimon case AF_INET: 242160814Ssimon addr->ncpaddr_family = AF_INET; 243194206Ssimon addr->ncpaddr_ip4addr = from->ncpaddr_ip4addr; 244194206Ssimon break; 245194206Ssimon#ifndef NOINET6 246194206Ssimon case AF_INET6: 247194206Ssimon addr->ncpaddr_family = AF_INET6; 248194206Ssimon addr->ncpaddr_ip6addr = from->ncpaddr_ip6addr; 249238405Sjkim break; 250238405Sjkim#endif 251142425Snectar default: 252194206Ssimon addr->ncpaddr_family = AF_UNSPEC; 253194206Ssimon } 254194206Ssimon} 255194206Ssimon 256238405Sjkimvoid 257238405Sjkimncpaddr_setip4addr(struct ncpaddr *addr, u_int32_t ip) 258238405Sjkim{ 259238405Sjkim addr->ncpaddr_family = AF_INET; 260238405Sjkim addr->ncpaddr_ip4addr.s_addr = ip; 261238405Sjkim} 262238405Sjkim 263238405Sjkimint 264238405Sjkimncpaddr_getip4addr(const struct ncpaddr *addr, u_int32_t *ip) 265238405Sjkim{ 266238405Sjkim if (addr->ncpaddr_family != AF_INET) 267238405Sjkim return 0; 268238405Sjkim *ip = addr->ncpaddr_ip4addr.s_addr; 269238405Sjkim return 1; 270238405Sjkim} 271238405Sjkim 272238405Sjkimvoid 273238405Sjkimncpaddr_setip4(struct ncpaddr *addr, struct in_addr ip) 274238405Sjkim{ 275238405Sjkim addr->ncpaddr_family = AF_INET; 276238405Sjkim addr->ncpaddr_ip4addr = ip; 277238405Sjkim} 278238405Sjkim 279238405Sjkimint 280238405Sjkimncpaddr_getip4(const struct ncpaddr *addr, struct in_addr *ip) 281238405Sjkim{ 282238405Sjkim if (addr->ncpaddr_family != AF_INET) 283238405Sjkim return 0; 284160814Ssimon *ip = addr->ncpaddr_ip4addr; 285160814Ssimon return 1; 286160814Ssimon} 287194206Ssimon 288194206Ssimon#ifndef NOINET6 289194206Ssimonvoid 290238405Sjkimncpaddr_setip6(struct ncpaddr *addr, const struct in6_addr *ip6) 291238405Sjkim{ 292142425Snectar addr->ncpaddr_family = AF_INET6; 293142425Snectar addr->ncpaddr_ip6addr = *ip6; 294194206Ssimon} 295194206Ssimon 296194206Ssimonint 297194206Ssimonncpaddr_getip6(const struct ncpaddr *addr, struct in6_addr *ip6) 298160814Ssimon{ 299238405Sjkim if (addr->ncpaddr_family != AF_INET6) 300238405Sjkim return 0; 301238405Sjkim *ip6 = addr->ncpaddr_ip6addr; 302238405Sjkim return 1; 303238405Sjkim} 304238405Sjkim#endif 305238405Sjkim 306238405Sjkimvoid 307238405Sjkimncpaddr_getsa(const struct ncpaddr *addr, struct sockaddr_storage *host) 308238405Sjkim{ 309238405Sjkim struct sockaddr_in *host4 = (struct sockaddr_in *)host; 310238405Sjkim#ifndef NOINET6 311238405Sjkim struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 312238405Sjkim#endif 313238405Sjkim 314194206Ssimon memset(host, '\0', sizeof(*host)); 315194206Ssimon 316194206Ssimon switch (addr->ncpaddr_family) { 317194206Ssimon case AF_INET: 318194206Ssimon host4->sin_family = AF_INET; 319194206Ssimon host4->sin_len = sizeof(*host4); 320238405Sjkim host4->sin_addr = addr->ncpaddr_ip4addr; 321238405Sjkim break; 322142425Snectar 323142425Snectar#ifndef NOINET6 324194206Ssimon case AF_INET6: 325194206Ssimon host6->sin6_family = AF_INET6; 326194206Ssimon host6->sin6_len = sizeof(*host6); 327194206Ssimon host6->sin6_addr = addr->ncpaddr_ip6addr; 328160814Ssimon break; 329194206Ssimon#endif 330160814Ssimon 331194206Ssimon default: 332194206Ssimon host->ss_family = AF_UNSPEC; 333194206Ssimon break; 334238405Sjkim } 335238405Sjkim} 336238405Sjkim 337238405Sjkimvoid 338238405Sjkimncpaddr_setsa(struct ncpaddr *addr, const struct sockaddr *host) 339238405Sjkim{ 340238405Sjkim const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 341238405Sjkim#ifndef NOINET6 342194206Ssimon const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 343194206Ssimon#endif 344194206Ssimon 345194206Ssimon switch (host->sa_family) { 346194206Ssimon case AF_INET: 347194206Ssimon addr->ncpaddr_family = AF_INET; 348238405Sjkim addr->ncpaddr_ip4addr = host4->sin_addr; 349238405Sjkim break; 350142425Snectar 351142425Snectar#ifndef NOINET6 352194206Ssimon case AF_INET6: 353194206Ssimon if (IN6_IS_ADDR_V4MAPPED(&host6->sin6_addr)) { 354194206Ssimon addr->ncpaddr_family = AF_INET; 355194206Ssimon addr->ncpaddr_ip4addr.s_addr = 356160814Ssimon *(const u_int32_t *)(host6->sin6_addr.s6_addr + 12); 357194206Ssimon } else { 358160814Ssimon addr->ncpaddr_family = AF_INET6; 359194206Ssimon addr->ncpaddr_ip6addr = host6->sin6_addr; 360194206Ssimon } 361194206Ssimon break; 362238405Sjkim#endif 363238405Sjkim 364238405Sjkim default: 365238405Sjkim addr->ncpaddr_family = AF_UNSPEC; 366238405Sjkim } 367238405Sjkim} 368238405Sjkim 369238405Sjkimstatic char * 370194206Ssimonncpaddr_ntowa(const struct ncpaddr *addr) 371194206Ssimon{ 372194206Ssimon static char res[NCP_ASCIIBUFFERSIZE]; 373194206Ssimon#ifndef NOINET6 374194206Ssimon struct sockaddr_in6 sin6; 375194206Ssimon#endif 376238405Sjkim 377238405Sjkim switch (addr->ncpaddr_family) { 378238405Sjkim case AF_INET: 379238405Sjkim snprintf(res, sizeof res, "%s", inet_ntoa(addr->ncpaddr_ip4addr)); 380238405Sjkim return res; 381238405Sjkim 382238405Sjkim#ifndef NOINET6 383194206Ssimon case AF_INET6: 384194206Ssimon memset(&sin6, '\0', sizeof(sin6)); 385194206Ssimon sin6.sin6_len = sizeof(sin6); 386194206Ssimon sin6.sin6_family = AF_INET6; 387194206Ssimon sin6.sin6_addr = addr->ncpaddr_ip6addr; 388194206Ssimon#if 0 389238405Sjkim adjust_linklocal(&sin6); 390238405Sjkim#endif 391160814Ssimon#ifdef NI_WITHSCOPEID 392194206Ssimon if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 393194206Ssimon NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST) != 0) 394194206Ssimon#else 395194206Ssimon if (getnameinfo((struct sockaddr *)&sin6, sizeof sin6, res, sizeof(res), 396238405Sjkim NULL, 0, NI_NUMERICHOST) != 0) 397238405Sjkim#endif 398238405Sjkim break; 399238405Sjkim 400238405Sjkim return res; 401238405Sjkim#endif 402238405Sjkim } 403238405Sjkim 404238405Sjkim snprintf(res, sizeof res, "<AF_UNSPEC>"); 405238405Sjkim return res; 406238405Sjkim} 407238405Sjkim 408238405Sjkimconst char * 409238405Sjkimncpaddr_ntoa(const struct ncpaddr *addr) 410238405Sjkim{ 411194206Ssimon return ncpaddr_ntowa(addr); 412194206Ssimon} 413194206Ssimon 414194206Ssimon 415194206Ssimonint 416194206Ssimonncpaddr_aton(struct ncpaddr *addr, struct ncp *ncp, const char *data) 417238405Sjkim{ 418238405Sjkim struct ncprange range; 419238405Sjkim 420238405Sjkim if (!ncprange_aton(&range, ncp, data)) 421238405Sjkim return 0; 422238405Sjkim 423238405Sjkim if (range.ncprange_family == AF_INET && range.ncprange_ip4width != 32 && 424194206Ssimon range.ncprange_ip4addr.s_addr != INADDR_ANY) { 425160814Ssimon log_Printf(LogWARN, "ncpaddr_aton: %s: Only 32 bits allowed\n", data); 426194206Ssimon return 0; 427194206Ssimon } 428194206Ssimon 429238405Sjkim#ifndef NOINET6 430238405Sjkim if (range.ncprange_family == AF_INET6 && range.ncprange_ip6width != 128 && 431238405Sjkim !IN6_IS_ADDR_UNSPECIFIED(&range.ncprange_ip6addr)) { 432238405Sjkim log_Printf(LogWARN, "ncpaddr_aton: %s: Only 128 bits allowed\n", data); 433238405Sjkim return 0; 434238405Sjkim } 435238405Sjkim#endif 436238405Sjkim 437194206Ssimon switch (range.ncprange_family) { 438194206Ssimon case AF_INET: 439194206Ssimon addr->ncpaddr_family = range.ncprange_family; 440194206Ssimon addr->ncpaddr_ip4addr = range.ncprange_ip4addr; 441194206Ssimon return 1; 442194206Ssimon 443238405Sjkim#ifndef NOINET6 444238405Sjkim case AF_INET6: 445160814Ssimon addr->ncpaddr_family = range.ncprange_family; 446194206Ssimon addr->ncpaddr_ip6addr = range.ncprange_ip6addr; 447194206Ssimon return 1; 448194206Ssimon#endif 449194206Ssimon } 450 451 return 0; 452} 453 454void 455ncprange_init(struct ncprange *range) 456{ 457 range->ncprange_family = AF_UNSPEC; 458} 459 460int 461ncprange_isset(const struct ncprange *range) 462{ 463 return range->ncprange_family != AF_UNSPEC; 464} 465 466int 467ncprange_equal(const struct ncprange *range, const struct ncprange *cmp) 468{ 469 if (range->ncprange_family != cmp->ncprange_family) 470 return 0; 471 472 switch (range->ncprange_family) { 473 case AF_INET: 474 if (range->ncprange_ip4addr.s_addr != cmp->ncprange_ip4addr.s_addr) 475 return 0; 476 return range->ncprange_ip4mask.s_addr == cmp->ncprange_ip4mask.s_addr; 477 478#ifndef NOINET6 479 case AF_INET6: 480 if (range->ncprange_ip6width != cmp->ncprange_ip6width) 481 return 0; 482 return !memcmp(&range->ncprange_ip6addr, &cmp->ncprange_ip6addr, 483 sizeof range->ncprange_ip6addr); 484#endif 485 486 case AF_UNSPEC: 487 return 1; 488 } 489 490 return 0; 491} 492 493int 494ncprange_isdefault(const struct ncprange *range) 495{ 496 switch (range->ncprange_family) { 497 case AF_INET: 498 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) 499 return 1; 500 break; 501 502#ifndef NOINET6 503 case AF_INET6: 504 if (range->ncprange_ip6width == 0 && 505 IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 506 return 1; 507 break; 508#endif 509 } 510 511 return 0; 512} 513 514void 515ncprange_setdefault(struct ncprange *range, int af) 516{ 517 memset(range, '\0', sizeof *range); 518 range->ncprange_family = af; 519} 520 521int 522ncprange_contains(const struct ncprange *range, const struct ncpaddr *addr) 523{ 524#ifndef NOINET6 525 const u_char masks[] = { 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff }; 526 const u_char *addrp, *rangep; 527 int bits; 528#endif 529 530 if (range->ncprange_family != addr->ncpaddr_family) 531 return 0; 532 533 switch (range->ncprange_family) { 534 case AF_INET: 535 return !((addr->ncpaddr_ip4addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 536 range->ncprange_ip4mask.s_addr); 537 538#ifndef NOINET6 539 case AF_INET6: 540 rangep = (const u_char *)range->ncprange_ip6addr.s6_addr; 541 addrp = (const u_char *)addr->ncpaddr_ip6addr.s6_addr; 542 543 for (bits = range->ncprange_ip6width; bits > 0; bits -= 8) 544 if ((*addrp++ ^ *rangep++) & masks[bits > 7 ? 7 : bits - 1]) 545 return 0; 546 547 return 1; 548#endif 549 } 550 551 return 0; 552} 553 554int 555ncprange_containsip4(const struct ncprange *range, struct in_addr addr) 556{ 557 switch (range->ncprange_family) { 558 case AF_INET: 559 return !((addr.s_addr ^ range->ncprange_ip4addr.s_addr) & 560 range->ncprange_ip4mask.s_addr); 561 } 562 563 return 0; 564} 565 566void 567ncprange_copy(struct ncprange *range, const struct ncprange *from) 568{ 569 switch (from->ncprange_family) { 570 case AF_INET: 571 range->ncprange_family = AF_INET; 572 range->ncprange_ip4addr = from->ncprange_ip4addr; 573 range->ncprange_ip4mask = from->ncprange_ip4mask; 574 range->ncprange_ip4width = from->ncprange_ip4width; 575 break; 576 577#ifndef NOINET6 578 case AF_INET6: 579 range->ncprange_family = AF_INET6; 580 range->ncprange_ip6addr = from->ncprange_ip6addr; 581 range->ncprange_ip6width = from->ncprange_ip6width; 582 break; 583#endif 584 585 default: 586 range->ncprange_family = AF_UNSPEC; 587 } 588} 589 590void 591ncprange_set(struct ncprange *range, const struct ncpaddr *addr, int width) 592{ 593 ncprange_sethost(range, addr); 594 ncprange_setwidth(range, width); 595} 596 597void 598ncprange_sethost(struct ncprange *range, const struct ncpaddr *from) 599{ 600 switch (from->ncpaddr_family) { 601 case AF_INET: 602 range->ncprange_family = AF_INET; 603 range->ncprange_ip4addr = from->ncpaddr_ip4addr; 604 if (from->ncpaddr_ip4addr.s_addr == INADDR_ANY) { 605 range->ncprange_ip4mask.s_addr = INADDR_ANY; 606 range->ncprange_ip4width = 0; 607 } else { 608 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 609 range->ncprange_ip4width = 32; 610 } 611 break; 612 613#ifndef NOINET6 614 case AF_INET6: 615 range->ncprange_family = AF_INET6; 616 range->ncprange_ip6addr = from->ncpaddr_ip6addr; 617 range->ncprange_ip6width = 128; 618 break; 619#endif 620 621 default: 622 range->ncprange_family = AF_UNSPEC; 623 } 624} 625 626int 627ncprange_ishost(const struct ncprange *range) 628{ 629 switch (range->ncprange_family) { 630 case AF_INET: 631 return range->ncprange_ip4width == 32; 632#ifndef NOINET6 633 case AF_INET6: 634 return range->ncprange_ip6width == 128; 635#endif 636 } 637 638 return (0); 639} 640 641int 642ncprange_setwidth(struct ncprange *range, int width) 643{ 644 switch (range->ncprange_family) { 645 case AF_INET: 646 if (width < 0 || width > 32) 647 break; 648 range->ncprange_ip4width = width; 649 range->ncprange_ip4mask = bits2mask4(width); 650 break; 651 652#ifndef NOINET6 653 case AF_INET6: 654 if (width < 0 || width > 128) 655 break; 656 range->ncprange_ip6width = width; 657 break; 658#endif 659 660 case AF_UNSPEC: 661 return 1; 662 } 663 664 return 0; 665} 666 667void 668ncprange_setip4host(struct ncprange *range, struct in_addr from) 669{ 670 range->ncprange_family = AF_INET; 671 range->ncprange_ip4addr = from; 672 if (from.s_addr == INADDR_ANY) { 673 range->ncprange_ip4mask.s_addr = INADDR_ANY; 674 range->ncprange_ip4width = 0; 675 } else { 676 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 677 range->ncprange_ip4width = 32; 678 } 679} 680 681void 682ncprange_setip4(struct ncprange *range, struct in_addr from, struct in_addr msk) 683{ 684 range->ncprange_family = AF_INET; 685 range->ncprange_ip4addr = from; 686 range->ncprange_ip4mask = msk; 687 range->ncprange_ip4width = mask42bits(msk); 688} 689 690 691int 692ncprange_setip4mask(struct ncprange *range, struct in_addr mask) 693{ 694 if (range->ncprange_family != AF_INET) 695 return 0; 696 range->ncprange_ip4mask = mask; 697 range->ncprange_ip4width = mask42bits(mask); 698 return 1; 699} 700 701void 702ncprange_setsa(struct ncprange *range, const struct sockaddr *host, 703 const struct sockaddr *mask) 704{ 705 const struct sockaddr_in *host4 = (const struct sockaddr_in *)host; 706 const struct sockaddr_in *mask4 = (const struct sockaddr_in *)mask; 707#ifndef NOINET6 708 const struct sockaddr_in6 *host6 = (const struct sockaddr_in6 *)host; 709 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask; 710#endif 711 712 switch (host->sa_family) { 713 case AF_INET: 714 range->ncprange_family = AF_INET; 715 range->ncprange_ip4addr = host4->sin_addr; 716 if (host4->sin_addr.s_addr == INADDR_ANY) { 717 range->ncprange_ip4mask.s_addr = INADDR_ANY; 718 range->ncprange_ip4width = 0; 719 } else if (mask4 && mask4->sin_family == AF_INET) { 720 range->ncprange_ip4mask.s_addr = mask4->sin_addr.s_addr; 721 range->ncprange_ip4width = mask42bits(mask4->sin_addr); 722 } else { 723 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 724 range->ncprange_ip4width = 32; 725 } 726 break; 727 728#ifndef NOINET6 729 case AF_INET6: 730 range->ncprange_family = AF_INET6; 731 range->ncprange_ip6addr = host6->sin6_addr; 732 if (IN6_IS_ADDR_UNSPECIFIED(&host6->sin6_addr)) 733 range->ncprange_ip6width = 0; 734 else 735 range->ncprange_ip6width = mask6 ? mask62bits(&mask6->sin6_addr) : 128; 736 break; 737#endif 738 739 default: 740 range->ncprange_family = AF_UNSPEC; 741 } 742} 743 744void 745ncprange_getsa(const struct ncprange *range, struct sockaddr_storage *host, 746 struct sockaddr_storage *mask) 747{ 748 struct sockaddr_in *host4 = (struct sockaddr_in *)host; 749 struct sockaddr_in *mask4 = (struct sockaddr_in *)mask; 750#ifndef NOINET6 751 struct sockaddr_in6 *host6 = (struct sockaddr_in6 *)host; 752 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)mask; 753#endif 754 755 memset(host, '\0', sizeof(*host)); 756 if (mask) 757 memset(mask, '\0', sizeof(*mask)); 758 759 switch (range->ncprange_family) { 760 case AF_INET: 761 host4->sin_family = AF_INET; 762 host4->sin_len = sizeof(*host4); 763 host4->sin_addr = range->ncprange_ip4addr; 764 if (mask4) { 765 mask4->sin_family = AF_INET; 766 mask4->sin_len = sizeof(*host4); 767 mask4->sin_addr = range->ncprange_ip4mask; 768 } 769 break; 770 771#ifndef NOINET6 772 case AF_INET6: 773 host6->sin6_family = AF_INET6; 774 host6->sin6_len = sizeof(*host6); 775 host6->sin6_addr = range->ncprange_ip6addr; 776 if (mask6) { 777 mask6->sin6_family = AF_INET6; 778 mask6->sin6_len = sizeof(*host6); 779 mask6->sin6_addr = bits2mask6(range->ncprange_ip6width); 780 } 781 break; 782#endif 783 784 default: 785 host->ss_family = AF_UNSPEC; 786 if (mask) 787 mask->ss_family = AF_UNSPEC; 788 break; 789 } 790} 791 792int 793ncprange_getaddr(const struct ncprange *range, struct ncpaddr *addr) 794{ 795 switch (range->ncprange_family) { 796 case AF_INET: 797 addr->ncpaddr_family = AF_INET; 798 addr->ncpaddr_ip4addr = range->ncprange_ip4addr; 799 return 1; 800#ifndef NOINET6 801 case AF_INET6: 802 addr->ncpaddr_family = AF_INET6; 803 addr->ncpaddr_ip6addr = range->ncprange_ip6addr; 804 return 1; 805#endif 806 } 807 808 return 0; 809} 810 811int 812ncprange_getip4addr(const struct ncprange *range, struct in_addr *addr) 813{ 814 if (range->ncprange_family != AF_INET) 815 return 0; 816 817 *addr = range->ncprange_ip4addr; 818 return 1; 819} 820 821int 822ncprange_getip4mask(const struct ncprange *range, struct in_addr *mask) 823{ 824 switch (range->ncprange_family) { 825 case AF_INET: 826 *mask = range->ncprange_ip4mask; 827 return 1; 828 } 829 830 return 0; 831} 832 833int 834ncprange_getwidth(const struct ncprange *range, int *width) 835{ 836 switch (range->ncprange_family) { 837 case AF_INET: 838 *width = range->ncprange_ip4width; 839 return 1; 840#ifndef NOINET6 841 case AF_INET6: 842 *width = range->ncprange_ip6width; 843 return 1; 844#endif 845 } 846 847 return 0; 848} 849 850const char * 851ncprange_ntoa(const struct ncprange *range) 852{ 853 char *res; 854 struct ncpaddr addr; 855 int len; 856 857 if (!ncprange_getaddr(range, &addr)) 858 return "<AF_UNSPEC>"; 859 860 res = ncpaddr_ntowa(&addr); 861 len = strlen(res); 862 if (len >= NCP_ASCIIBUFFERSIZE - 1) 863 return res; 864 865 switch (range->ncprange_family) { 866 case AF_INET: 867 if (range->ncprange_ip4width == -1) { 868 /* A non-contiguous mask */ 869 for (; len >= 3; res[len -= 2] = '\0') 870 if (strcmp(res + len - 2, ".0")) 871 break; 872 snprintf(res + len, sizeof res - len, "&0x%08lx", 873 (unsigned long)ntohl(range->ncprange_ip4mask.s_addr)); 874 } else if (range->ncprange_ip4width < 32) 875 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip4width); 876 877 return res; 878 879#ifndef NOINET6 880 case AF_INET6: 881 if (range->ncprange_ip6width != 128) 882 snprintf(res + len, sizeof res - len, "/%d", range->ncprange_ip6width); 883 884 return res; 885#endif 886 } 887 888 return "<AF_UNSPEC>"; 889} 890 891#ifndef NOINET6 892int 893ncprange_scopeid(const struct ncprange *range) 894{ 895 const struct in6_addr *sin6; 896 int scopeid = -1; 897 898 if (range->ncprange_family == AF_INET6) { 899 sin6 = &range->ncprange_ip6addr; 900 if (IN6_IS_ADDR_LINKLOCAL(sin6) || IN6_IS_ADDR_MC_LINKLOCAL(sin6)) 901 if ((scopeid = ntohs(*(const u_short *)&sin6->s6_addr[2])) == 0) 902 scopeid = -1; 903 } 904 905 return scopeid; 906} 907#endif 908 909int 910ncprange_aton(struct ncprange *range, struct ncp *ncp, const char *data) 911{ 912 int bits, len; 913 char *wp; 914 const char *cp; 915 char *s; 916 917 len = strcspn(data, "/"); 918 919 if (ncp && strncasecmp(data, "HISADDR", len) == 0) { 920 range->ncprange_family = AF_INET; 921 range->ncprange_ip4addr = ncp->ipcp.peer_ip; 922 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 923 range->ncprange_ip4width = 32; 924 return 1; 925#ifndef NOINET6 926 } else if (ncp && strncasecmp(data, "HISADDR6", len) == 0) { 927 range->ncprange_family = AF_INET6; 928 range->ncprange_ip6addr = ncp->ipv6cp.hisaddr.ncpaddr_ip6addr; 929 range->ncprange_ip6width = 128; 930 return 1; 931#endif 932 } else if (ncp && strncasecmp(data, "MYADDR", len) == 0) { 933 range->ncprange_family = AF_INET; 934 range->ncprange_ip4addr = ncp->ipcp.my_ip; 935 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 936 range->ncprange_ip4width = 32; 937 return 1; 938#ifndef NOINET6 939 } else if (ncp && strncasecmp(data, "MYADDR6", len) == 0) { 940 range->ncprange_family = AF_INET6; 941 range->ncprange_ip6addr = ncp->ipv6cp.myaddr.ncpaddr_ip6addr; 942 range->ncprange_ip6width = 128; 943 return 1; 944#endif 945 } else if (ncp && strncasecmp(data, "DNS0", len) == 0) { 946 range->ncprange_family = AF_INET; 947 range->ncprange_ip4addr = ncp->ipcp.ns.dns[0]; 948 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 949 range->ncprange_ip4width = 32; 950 return 1; 951 } else if (ncp && strncasecmp(data, "DNS1", len) == 0) { 952 range->ncprange_family = AF_INET; 953 range->ncprange_ip4addr = ncp->ipcp.ns.dns[1]; 954 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 955 range->ncprange_ip4width = 32; 956 return 1; 957 } 958 959 s = (char *)alloca(len + 1); 960 strncpy(s, data, len); 961 s[len] = '\0'; 962 bits = -1; 963 964 if (data[len] != '\0') { 965 bits = strtol(data + len + 1, &wp, 0); 966 if (*wp || wp == data + len + 1 || bits < 0 || bits > 128) { 967 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 968 return 0; 969 } 970 } 971 972 if ((cp = strchr(data, ':')) == NULL) { 973 range->ncprange_family = AF_INET; 974 975 range->ncprange_ip4addr = GetIpAddr(s); 976 977 if (range->ncprange_ip4addr.s_addr == INADDR_NONE) { 978 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 979 return 0; 980 } 981 982 if (range->ncprange_ip4addr.s_addr == INADDR_ANY) { 983 range->ncprange_ip4mask.s_addr = INADDR_ANY; 984 range->ncprange_ip4width = 0; 985 } else if (bits == -1) { 986 range->ncprange_ip4mask.s_addr = INADDR_BROADCAST; 987 range->ncprange_ip4width = 32; 988 } else if (bits > 32) { 989 log_Printf(LogWARN, "ncprange_aton: bad mask width.\n"); 990 return 0; 991 } else { 992 range->ncprange_ip4mask = bits2mask4(bits); 993 range->ncprange_ip4width = bits; 994 } 995 996 return 1; 997#ifndef NOINET6 998 } else if (strchr(cp + 1, ':') != NULL) { 999 range->ncprange_family = AF_INET6; 1000 1001 if (inet_pton(AF_INET6, s, &range->ncprange_ip6addr) != 1) { 1002 log_Printf(LogWARN, "ncprange_aton: %s: Bad address\n", s); 1003 return 0; 1004 } 1005 1006 if (IN6_IS_ADDR_UNSPECIFIED(&range->ncprange_ip6addr)) 1007 range->ncprange_ip6width = 0; 1008 else 1009 range->ncprange_ip6width = (bits == -1) ? 128 : bits; 1010 return 1; 1011#endif 1012 } 1013 1014 return 0; 1015} 1016