in6_ifattach.c revision 1.16
1 /* $NetBSD: in6_ifattach.c,v 1.16 2000/02/02 13:44:06 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 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 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/socket.h> 36 #include <sys/sockio.h> 37 #include <sys/kernel.h> 38 #include <sys/md5.h> 39 40 #include <net/if.h> 41 #include <net/if_dl.h> 42 #include <net/if_types.h> 43 #include <net/route.h> 44 45 #include <netinet/in.h> 46 #include <netinet/in_var.h> 47 48 #include <netinet6/ip6.h> 49 #include <netinet6/ip6_var.h> 50 #include <netinet6/in6_ifattach.h> 51 #include <netinet6/ip6.h> 52 #include <netinet6/ip6_var.h> 53 #include <netinet6/nd6.h> 54 55 #include <net/net_osdep.h> 56 57 static struct in6_addr llsol; 58 59 struct in6_ifstat **in6_ifstat = NULL; 60 struct icmp6_ifstat **icmp6_ifstat = NULL; 61 size_t in6_ifstatmax = 0; 62 size_t icmp6_ifstatmax = 0; 63 unsigned long in6_maxmtu = 0; 64 65 int found_first_ifid = 0; 66 #define IFID_LEN 8 67 static u_int8_t first_ifid[IFID_LEN]; 68 69 static int laddr_to_eui64 __P((u_int8_t *, u_int8_t *, size_t)); 70 static int gen_rand_eui64 __P((u_int8_t *)); 71 72 static int 73 laddr_to_eui64(dst, src, len) 74 u_int8_t *dst; 75 u_int8_t *src; 76 size_t len; 77 { 78 static u_int8_t zero[8]; 79 80 bzero(zero, sizeof(zero)); 81 82 switch (len) { 83 case 6: 84 if (bcmp(zero, src, 6) == 0) 85 return EINVAL; 86 dst[0] = src[0]; 87 dst[1] = src[1]; 88 dst[2] = src[2]; 89 dst[3] = 0xff; 90 dst[4] = 0xfe; 91 dst[5] = src[3]; 92 dst[6] = src[4]; 93 dst[7] = src[5]; 94 break; 95 case 8: 96 if (bcmp(zero, src, 8) == 0) 97 return EINVAL; 98 bcopy(src, dst, len); 99 break; 100 default: 101 return EINVAL; 102 } 103 104 return 0; 105 } 106 107 /* 108 * Generate a last-resort interface identifier, when the machine has no 109 * IEEE802/EUI64 address sources. 110 * The address should be random, and should not change across reboot. 111 */ 112 static int 113 gen_rand_eui64(dst) 114 u_int8_t *dst; 115 { 116 MD5_CTX ctxt; 117 u_int8_t digest[16]; 118 119 /* generate 8bytes of pseudo-random value. */ 120 bzero(&ctxt, sizeof(ctxt)); 121 MD5Init(&ctxt); 122 MD5Update(&ctxt, hostname, hostnamelen); 123 MD5Final(digest, &ctxt); 124 125 /* assumes sizeof(digest) > sizeof(first_ifid) */ 126 bcopy(digest, dst, 8); 127 128 /* make sure to set "u" bit to local, and "g" bit to individual. */ 129 dst[0] &= 0xfe; 130 dst[0] |= 0x02; /* EUI64 "local" */ 131 132 return 0; 133 } 134 135 /* 136 * Find first ifid on list of interfaces. 137 * This is assumed that ifp0's interface token (for example, IEEE802 MAC) 138 * is globally unique. We may need to have a flag parameter in the future. 139 */ 140 int 141 in6_ifattach_getifid(ifp0) 142 struct ifnet *ifp0; 143 { 144 struct ifnet *ifp; 145 struct ifaddr *ifa; 146 u_int8_t *addr = NULL; 147 int addrlen = 0; 148 struct sockaddr_dl *sdl; 149 150 if (found_first_ifid) 151 return 0; 152 153 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_list.tqe_next) 154 { 155 if (ifp0 != NULL && ifp0 != ifp) 156 continue; 157 for (ifa = ifp->if_addrlist.tqh_first; 158 ifa; 159 ifa = ifa->ifa_list.tqe_next) 160 { 161 if (ifa->ifa_addr->sa_family != AF_LINK) 162 continue; 163 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 164 if (sdl == NULL) 165 continue; 166 if (sdl->sdl_alen == 0) 167 continue; 168 switch (ifp->if_type) { 169 case IFT_ETHER: 170 case IFT_FDDI: 171 case IFT_ATM: 172 /* IEEE802/EUI64 cases - what others? */ 173 addr = LLADDR(sdl); 174 addrlen = sdl->sdl_alen; 175 /* 176 * to copy ifid from IEEE802/EUI64 interface, 177 * u bit of the source needs to be 0. 178 */ 179 if ((addr[0] & 0x02) != 0) 180 break; 181 goto found; 182 case IFT_ARCNET: 183 /* 184 * ARCnet interface token cannot be used as 185 * globally unique identifier due to its 186 * small bitwidth. 187 */ 188 break; 189 default: 190 break; 191 } 192 } 193 } 194 #ifdef DEBUG 195 printf("in6_ifattach_getifid: failed to get EUI64"); 196 #endif 197 return EADDRNOTAVAIL; 198 199 found: 200 if (laddr_to_eui64(first_ifid, addr, addrlen) == 0) 201 found_first_ifid = 1; 202 203 if (found_first_ifid) { 204 printf("%s: supplying EUI64: " 205 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", 206 if_name(ifp), 207 first_ifid[0], first_ifid[1], 208 first_ifid[2], first_ifid[3], 209 first_ifid[4], first_ifid[5], 210 first_ifid[6], first_ifid[7]); 211 212 /* invert u bit to convert EUI64 to RFC2373 interface ID. */ 213 first_ifid[0] ^= 0x02; 214 215 return 0; 216 } else { 217 #ifdef DEBUG 218 printf("in6_ifattach_getifid: failed to get EUI64"); 219 #endif 220 return EADDRNOTAVAIL; 221 } 222 } 223 224 void 225 in6_ifattach(ifp, type, laddr, noloop) 226 struct ifnet *ifp; 227 u_int type; 228 caddr_t laddr; 229 /* size_t laddrlen; */ 230 int noloop; 231 { 232 static size_t if_indexlim = 8; 233 struct sockaddr_in6 mltaddr; 234 struct sockaddr_in6 mltmask; 235 struct sockaddr_in6 gate; 236 struct sockaddr_in6 mask; 237 238 struct in6_ifaddr *ia, *ib, *oia; 239 struct ifaddr *ifa; 240 int rtflag = 0; 241 242 if (type == IN6_IFT_P2P && found_first_ifid == 0) { 243 printf("%s: no ifid available for IPv6 link-local address\n", 244 if_name(ifp)); 245 #if 0 246 return; 247 #else 248 /* last resort */ 249 if (gen_rand_eui64(first_ifid) == 0) { 250 printf("%s: using random value as EUI64: " 251 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", 252 if_name(ifp), 253 first_ifid[0], first_ifid[1], 254 first_ifid[2], first_ifid[3], 255 first_ifid[4], first_ifid[5], 256 first_ifid[6], first_ifid[7]); 257 /* 258 * invert u bit to convert EUI64 to RFC2373 interface 259 * ID. 260 */ 261 first_ifid[0] ^= 0x02; 262 263 found_first_ifid = 1; 264 } 265 #endif 266 } 267 268 if ((ifp->if_flags & IFF_MULTICAST) == 0) { 269 printf("%s: not multicast capable, IPv6 not enabled\n", 270 if_name(ifp)); 271 return; 272 } 273 274 /* 275 * We have some arrays that should be indexed by if_index. 276 * since if_index will grow dynamically, they should grow too. 277 * struct in6_ifstat **in6_ifstat 278 * struct icmp6_ifstat **icmp6_ifstat 279 */ 280 if (in6_ifstat == NULL || icmp6_ifstat == NULL 281 || if_index >= if_indexlim) { 282 size_t n; 283 caddr_t q; 284 size_t olim; 285 286 olim = if_indexlim; 287 while (if_index >= if_indexlim) 288 if_indexlim <<= 1; 289 290 /* grow in6_ifstat */ 291 n = if_indexlim * sizeof(struct in6_ifstat *); 292 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 293 bzero(q, n); 294 if (in6_ifstat) { 295 bcopy((caddr_t)in6_ifstat, q, 296 olim * sizeof(struct in6_ifstat *)); 297 free((caddr_t)in6_ifstat, M_IFADDR); 298 } 299 in6_ifstat = (struct in6_ifstat **)q; 300 in6_ifstatmax = if_indexlim; 301 302 /* grow icmp6_ifstat */ 303 n = if_indexlim * sizeof(struct icmp6_ifstat *); 304 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 305 bzero(q, n); 306 if (icmp6_ifstat) { 307 bcopy((caddr_t)icmp6_ifstat, q, 308 olim * sizeof(struct icmp6_ifstat *)); 309 free((caddr_t)icmp6_ifstat, M_IFADDR); 310 } 311 icmp6_ifstat = (struct icmp6_ifstat **)q; 312 icmp6_ifstatmax = if_indexlim; 313 } 314 315 /* 316 * To prevent to assign link-local address to PnP network 317 * cards multiple times. 318 * This is lengthy for P2P and LOOP but works. 319 */ 320 ifa = TAILQ_FIRST(&ifp->if_addrlist); 321 if (ifa != NULL) { 322 for ( ; ifa; ifa = TAILQ_NEXT(ifa, ifa_list)) { 323 if (ifa->ifa_addr->sa_family != AF_INET6) 324 continue; 325 if (IN6_IS_ADDR_LINKLOCAL(&satosin6(ifa->ifa_addr)->sin6_addr)) 326 return; 327 } 328 } else { 329 TAILQ_INIT(&ifp->if_addrlist); 330 } 331 332 /* 333 * link-local address 334 */ 335 ia = (struct in6_ifaddr *)malloc(sizeof(*ia), M_IFADDR, M_WAITOK); 336 bzero((caddr_t)ia, sizeof(*ia)); 337 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 338 ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 339 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 340 ia->ia_ifp = ifp; 341 TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); 342 IFAREF((struct ifaddr *)ia); 343 344 /* 345 * Also link into the IPv6 address chain beginning with in6_ifaddr. 346 * kazu opposed it, but itojun & jinmei wanted. 347 */ 348 if ((oia = in6_ifaddr) != NULL) { 349 for (; oia->ia_next; oia = oia->ia_next) 350 continue; 351 oia->ia_next = ia; 352 } else 353 in6_ifaddr = ia; 354 IFAREF((struct ifaddr *)ia); 355 356 ia->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 357 ia->ia_prefixmask.sin6_family = AF_INET6; 358 ia->ia_prefixmask.sin6_addr = in6mask64; 359 360 bzero(&ia->ia_addr, sizeof(struct sockaddr_in6)); 361 ia->ia_addr.sin6_len = sizeof(struct sockaddr_in6); 362 ia->ia_addr.sin6_family = AF_INET6; 363 ia->ia_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); 364 ia->ia_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 365 ia->ia_addr.sin6_addr.s6_addr32[1] = 0; 366 367 switch (type) { 368 case IN6_IFT_LOOP: 369 ia->ia_addr.sin6_addr.s6_addr32[2] = 0; 370 ia->ia_addr.sin6_addr.s6_addr32[3] = htonl(1); 371 break; 372 case IN6_IFT_802: 373 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 374 ia->ia_ifa.ifa_flags |= RTF_CLONING; 375 rtflag = RTF_CLONING; 376 /* fall through */ 377 case IN6_IFT_P2P802: 378 if (laddr == NULL) 379 break; 380 /* XXX use laddrlen */ 381 if (laddr_to_eui64(&ia->ia_addr.sin6_addr.s6_addr8[8], 382 laddr, 6) != 0) { 383 break; 384 } 385 /* invert u bit to convert EUI64 to RFC2373 interface ID. */ 386 ia->ia_addr.sin6_addr.s6_addr8[8] ^= 0x02; 387 if (found_first_ifid == 0) 388 in6_ifattach_getifid(ifp); 389 bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); 390 ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); 391 ia->ia_dstaddr.sin6_family = AF_INET6; 392 break; 393 case IN6_IFT_P2P: 394 bcopy((caddr_t)first_ifid, 395 (caddr_t)&ia->ia_addr.sin6_addr.s6_addr8[8], 396 IFID_LEN); 397 bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); 398 ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); 399 ia->ia_dstaddr.sin6_family = AF_INET6; 400 break; 401 case IN6_IFT_ARCNET: 402 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 403 ia->ia_ifa.ifa_flags |= RTF_CLONING; 404 rtflag = RTF_CLONING; 405 if (laddr == NULL) 406 break; 407 408 /* make non-global IF id out of link-level address */ 409 bzero(&ia->ia_addr.sin6_addr.s6_addr8[8], 7); 410 ia->ia_addr.sin6_addr.s6_addr8[15] = *laddr; 411 } 412 413 ia->ia_ifa.ifa_metric = ifp->if_metric; 414 415 if (ifp->if_ioctl != NULL) { 416 int s; 417 int error; 418 419 /* 420 * give the interface a chance to initialize, in case this 421 * is the first address to be added. 422 */ 423 s = splimp(); 424 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 425 splx(s); 426 427 if (error) { 428 switch (error) { 429 case EAFNOSUPPORT: 430 printf("%s: IPv6 not supported\n", 431 if_name(ifp)); 432 break; 433 default: 434 printf("%s: SIOCSIFADDR error %d\n", 435 if_name(ifp), error); 436 break; 437 } 438 439 /* undo changes */ 440 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); 441 IFAFREE((struct ifaddr *)ia); 442 if (oia) 443 oia->ia_next = ia->ia_next; 444 else 445 in6_ifaddr = ia->ia_next; 446 IFAFREE((struct ifaddr *)ia); 447 return; 448 } 449 } 450 451 /* add route to the interface. */ 452 rtrequest(RTM_ADD, 453 (struct sockaddr *)&ia->ia_addr, 454 (struct sockaddr *)&ia->ia_addr, 455 (struct sockaddr *)&ia->ia_prefixmask, 456 RTF_UP|rtflag, 457 (struct rtentry **)0); 458 ia->ia_flags |= IFA_ROUTE; 459 460 if (type == IN6_IFT_P2P || type == IN6_IFT_P2P802) { 461 /* 462 * route local address to loopback 463 */ 464 bzero(&gate, sizeof(gate)); 465 gate.sin6_len = sizeof(struct sockaddr_in6); 466 gate.sin6_family = AF_INET6; 467 gate.sin6_addr = in6addr_loopback; 468 bzero(&mask, sizeof(mask)); 469 mask.sin6_len = sizeof(struct sockaddr_in6); 470 mask.sin6_family = AF_INET6; 471 mask.sin6_addr = in6mask64; 472 rtrequest(RTM_ADD, 473 (struct sockaddr *)&ia->ia_addr, 474 (struct sockaddr *)&gate, 475 (struct sockaddr *)&mask, 476 RTF_UP|RTF_HOST, 477 (struct rtentry **)0); 478 } 479 480 /* 481 * loopback address 482 */ 483 ib = (struct in6_ifaddr *)NULL; 484 if (type == IN6_IFT_LOOP) { 485 ib = (struct in6_ifaddr *) 486 malloc(sizeof(*ib), M_IFADDR, M_WAITOK); 487 bzero((caddr_t)ib, sizeof(*ib)); 488 ib->ia_ifa.ifa_addr = (struct sockaddr *)&ib->ia_addr; 489 ib->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ib->ia_dstaddr; 490 ib->ia_ifa.ifa_netmask = (struct sockaddr *)&ib->ia_prefixmask; 491 ib->ia_ifp = ifp; 492 493 ia->ia_next = ib; 494 TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ib, 495 ifa_list); 496 497 ib->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 498 ib->ia_prefixmask.sin6_family = AF_INET6; 499 ib->ia_prefixmask.sin6_addr = in6mask128; 500 ib->ia_addr.sin6_len = sizeof(struct sockaddr_in6); 501 ib->ia_addr.sin6_family = AF_INET6; 502 ib->ia_addr.sin6_addr = in6addr_loopback; 503 504 ib->ia_ifa.ifa_metric = ifp->if_metric; 505 506 rtrequest(RTM_ADD, 507 (struct sockaddr *)&ib->ia_addr, 508 (struct sockaddr *)&ib->ia_addr, 509 (struct sockaddr *)&ib->ia_prefixmask, 510 RTF_UP|RTF_HOST, 511 (struct rtentry **)0); 512 513 ib->ia_flags |= IFA_ROUTE; 514 } 515 516 /* 517 * join multicast 518 */ 519 if (ifp->if_flags & IFF_MULTICAST) { 520 int error; /* not used */ 521 522 /* Restore saved multicast addresses(if any). */ 523 in6_restoremkludge(ia, ifp); 524 525 bzero(&mltmask, sizeof(mltmask)); 526 mltmask.sin6_len = sizeof(struct sockaddr_in6); 527 mltmask.sin6_family = AF_INET6; 528 mltmask.sin6_addr = in6mask32; 529 530 /* 531 * join link-local all-nodes address 532 */ 533 bzero(&mltaddr, sizeof(mltaddr)); 534 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 535 mltaddr.sin6_family = AF_INET6; 536 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 537 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 538 rtrequest(RTM_ADD, 539 (struct sockaddr *)&mltaddr, 540 (struct sockaddr *)&ia->ia_addr, 541 (struct sockaddr *)&mltmask, 542 RTF_UP|RTF_CLONING, /* xxx */ 543 (struct rtentry **)0); 544 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 545 546 if (type == IN6_IFT_LOOP) { 547 /* 548 * join node-local all-nodes address 549 */ 550 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 551 rtrequest(RTM_ADD, 552 (struct sockaddr *)&mltaddr, 553 (struct sockaddr *)&ib->ia_addr, 554 (struct sockaddr *)&mltmask, 555 RTF_UP, 556 (struct rtentry **)0); 557 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 558 } else { 559 /* 560 * join solicited multicast address 561 */ 562 bzero(&llsol, sizeof(llsol)); 563 llsol.s6_addr16[0] = htons(0xff02); 564 llsol.s6_addr16[1] = htons(ifp->if_index); 565 llsol.s6_addr32[1] = 0; 566 llsol.s6_addr32[2] = htonl(1); 567 llsol.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3]; 568 llsol.s6_addr8[12] = 0xff; 569 (void)in6_addmulti(&llsol, ifp, &error); 570 } 571 } 572 573 /* update dynamically. */ 574 if (in6_maxmtu < ifp->if_mtu) 575 in6_maxmtu = ifp->if_mtu; 576 577 if (in6_ifstat[ifp->if_index] == NULL) { 578 in6_ifstat[ifp->if_index] = (struct in6_ifstat *) 579 malloc(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK); 580 bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat)); 581 } 582 if (icmp6_ifstat[ifp->if_index] == NULL) { 583 icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *) 584 malloc(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK); 585 bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat)); 586 } 587 588 /* initialize NDP variables */ 589 nd6_ifattach(ifp); 590 591 /* mark the address TENTATIVE, if needed. */ 592 switch (ifp->if_type) { 593 case IFT_ARCNET: 594 case IFT_ETHER: 595 case IFT_FDDI: 596 #if 0 597 case IFT_ATM: 598 case IFT_SLIP: 599 case IFT_PPP: 600 #endif 601 ia->ia6_flags |= IN6_IFF_TENTATIVE; 602 /* nd6_dad_start() will be called in in6_if_up */ 603 break; 604 case IFT_GIF: /*XXX*/ 605 case IFT_LOOP: 606 case IFT_FAITH: 607 default: 608 break; 609 } 610 611 return; 612 } 613 614 void 615 in6_ifdetach(ifp) 616 struct ifnet *ifp; 617 { 618 struct in6_ifaddr *ia, *oia; 619 struct ifaddr *ifa; 620 struct rtentry *rt; 621 short rtflags; 622 struct sockaddr_in6 sin6; 623 624 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) 625 { 626 if (ifa->ifa_addr->sa_family != AF_INET6 627 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) { 628 continue; 629 } 630 631 ia = (struct in6_ifaddr *)ifa; 632 633 /* remove from the routing table */ 634 if ((ia->ia_flags & IFA_ROUTE) 635 && (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0))) { 636 rtflags = rt->rt_flags; 637 rtfree(rt); 638 rtrequest(RTM_DELETE, 639 (struct sockaddr *)&ia->ia_addr, 640 (struct sockaddr *)&ia->ia_addr, 641 (struct sockaddr *)&ia->ia_prefixmask, 642 rtflags, (struct rtentry **)0); 643 } 644 645 /* remove from the linked list */ 646 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); 647 648 /* also remove from the IPv6 address chain(itojun&jinmei) */ 649 oia = ia; 650 if (oia == (ia = in6_ifaddr)) 651 in6_ifaddr = ia->ia_next; 652 else { 653 while (ia->ia_next && (ia->ia_next != oia)) 654 ia = ia->ia_next; 655 if (ia->ia_next) 656 ia->ia_next = oia->ia_next; 657 #ifdef DEBUG 658 else 659 printf("%s: didn't unlink in6ifaddr from " 660 "list\n", if_name(ifp)); 661 #endif 662 } 663 664 free(ia, M_IFADDR); 665 } 666 667 /* remove route to link-local allnodes multicast (ff02::1) */ 668 bzero(&sin6, sizeof(sin6)); 669 sin6.sin6_len = sizeof(struct sockaddr_in6); 670 sin6.sin6_family = AF_INET6; 671 sin6.sin6_addr = in6addr_linklocal_allnodes; 672 sin6.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 673 if ((rt = rtalloc1((struct sockaddr *)&sin6, 0)) != NULL) { 674 rtrequest(RTM_DELETE, (struct sockaddr *)rt_key(rt), 675 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 0); 676 rtfree(rt); 677 } 678 } 679
Indexes created Wed Sep 24 05:09:52 GMT 2025