in6_ifattach.c revision 1.14
1 /* $NetBSD: in6_ifattach.c,v 1.14 2000/01/06 15:46:09 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 /* 343 * Also link into the IPv6 address chain beginning with in6_ifaddr. 344 * kazu opposed it, but itojun & jinmei wanted. 345 */ 346 if ((oia = in6_ifaddr) != NULL) { 347 for (; oia->ia_next; oia = oia->ia_next) 348 continue; 349 oia->ia_next = ia; 350 } else 351 in6_ifaddr = ia; 352 353 ia->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 354 ia->ia_prefixmask.sin6_family = AF_INET6; 355 ia->ia_prefixmask.sin6_addr = in6mask64; 356 357 bzero(&ia->ia_addr, sizeof(struct sockaddr_in6)); 358 ia->ia_addr.sin6_len = sizeof(struct sockaddr_in6); 359 ia->ia_addr.sin6_family = AF_INET6; 360 ia->ia_addr.sin6_addr.s6_addr16[0] = htons(0xfe80); 361 ia->ia_addr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 362 ia->ia_addr.sin6_addr.s6_addr32[1] = 0; 363 364 switch (type) { 365 case IN6_IFT_LOOP: 366 ia->ia_addr.sin6_addr.s6_addr32[2] = 0; 367 ia->ia_addr.sin6_addr.s6_addr32[3] = htonl(1); 368 break; 369 case IN6_IFT_802: 370 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 371 ia->ia_ifa.ifa_flags |= RTF_CLONING; 372 rtflag = RTF_CLONING; 373 /* fall through */ 374 case IN6_IFT_P2P802: 375 if (laddr == NULL) 376 break; 377 /* XXX use laddrlen */ 378 if (laddr_to_eui64(&ia->ia_addr.sin6_addr.s6_addr8[8], 379 laddr, 6) != 0) { 380 break; 381 } 382 /* invert u bit to convert EUI64 to RFC2373 interface ID. */ 383 ia->ia_addr.sin6_addr.s6_addr8[8] ^= 0x02; 384 if (found_first_ifid == 0) 385 in6_ifattach_getifid(ifp); 386 bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); 387 ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); 388 ia->ia_dstaddr.sin6_family = AF_INET6; 389 break; 390 case IN6_IFT_P2P: 391 bcopy((caddr_t)first_ifid, 392 (caddr_t)&ia->ia_addr.sin6_addr.s6_addr8[8], 393 IFID_LEN); 394 bzero(&ia->ia_dstaddr, sizeof(struct sockaddr_in6)); 395 ia->ia_dstaddr.sin6_len = sizeof(struct sockaddr_in6); 396 ia->ia_dstaddr.sin6_family = AF_INET6; 397 break; 398 case IN6_IFT_ARCNET: 399 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 400 ia->ia_ifa.ifa_flags |= RTF_CLONING; 401 rtflag = RTF_CLONING; 402 if (laddr == NULL) 403 break; 404 405 /* make non-global IF id out of link-level address */ 406 bzero(&ia->ia_addr.sin6_addr.s6_addr8[8], 7); 407 ia->ia_addr.sin6_addr.s6_addr8[15] = *laddr; 408 } 409 410 ia->ia_ifa.ifa_metric = ifp->if_metric; 411 412 if (ifp->if_ioctl != NULL) { 413 int s; 414 int error; 415 416 /* 417 * give the interface a chance to initialize, in case this 418 * is the first address to be added. 419 */ 420 s = splimp(); 421 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 422 splx(s); 423 424 if (error) { 425 switch (error) { 426 case EAFNOSUPPORT: 427 printf("%s: IPv6 not supported\n", 428 if_name(ifp)); 429 break; 430 default: 431 printf("%s: SIOCSIFADDR error %d\n", 432 if_name(ifp), error); 433 break; 434 } 435 436 /* undo changes */ 437 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); 438 if (oia) 439 oia->ia_next = ia->ia_next; 440 else 441 in6_ifaddr = ia->ia_next; 442 free(ia, M_IFADDR); 443 return; 444 } 445 } 446 447 /* add route to the interface. */ 448 rtrequest(RTM_ADD, 449 (struct sockaddr *)&ia->ia_addr, 450 (struct sockaddr *)&ia->ia_addr, 451 (struct sockaddr *)&ia->ia_prefixmask, 452 RTF_UP|rtflag, 453 (struct rtentry **)0); 454 ia->ia_flags |= IFA_ROUTE; 455 456 if (type == IN6_IFT_P2P || type == IN6_IFT_P2P802) { 457 /* 458 * route local address to loopback 459 */ 460 bzero(&gate, sizeof(gate)); 461 gate.sin6_len = sizeof(struct sockaddr_in6); 462 gate.sin6_family = AF_INET6; 463 gate.sin6_addr = in6addr_loopback; 464 bzero(&mask, sizeof(mask)); 465 mask.sin6_len = sizeof(struct sockaddr_in6); 466 mask.sin6_family = AF_INET6; 467 mask.sin6_addr = in6mask64; 468 rtrequest(RTM_ADD, 469 (struct sockaddr *)&ia->ia_addr, 470 (struct sockaddr *)&gate, 471 (struct sockaddr *)&mask, 472 RTF_UP|RTF_HOST, 473 (struct rtentry **)0); 474 } 475 476 /* 477 * loopback address 478 */ 479 ib = (struct in6_ifaddr *)NULL; 480 if (type == IN6_IFT_LOOP) { 481 ib = (struct in6_ifaddr *) 482 malloc(sizeof(*ib), M_IFADDR, M_WAITOK); 483 bzero((caddr_t)ib, sizeof(*ib)); 484 ib->ia_ifa.ifa_addr = (struct sockaddr *)&ib->ia_addr; 485 ib->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ib->ia_dstaddr; 486 ib->ia_ifa.ifa_netmask = (struct sockaddr *)&ib->ia_prefixmask; 487 ib->ia_ifp = ifp; 488 489 ia->ia_next = ib; 490 TAILQ_INSERT_TAIL(&ifp->if_addrlist, (struct ifaddr *)ib, 491 ifa_list); 492 493 ib->ia_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 494 ib->ia_prefixmask.sin6_family = AF_INET6; 495 ib->ia_prefixmask.sin6_addr = in6mask128; 496 ib->ia_addr.sin6_len = sizeof(struct sockaddr_in6); 497 ib->ia_addr.sin6_family = AF_INET6; 498 ib->ia_addr.sin6_addr = in6addr_loopback; 499 500 ib->ia_ifa.ifa_metric = ifp->if_metric; 501 502 rtrequest(RTM_ADD, 503 (struct sockaddr *)&ib->ia_addr, 504 (struct sockaddr *)&ib->ia_addr, 505 (struct sockaddr *)&ib->ia_prefixmask, 506 RTF_UP|RTF_HOST, 507 (struct rtentry **)0); 508 509 ib->ia_flags |= IFA_ROUTE; 510 } 511 512 /* 513 * join multicast 514 */ 515 if (ifp->if_flags & IFF_MULTICAST) { 516 int error; /* not used */ 517 518 /* Restore saved multicast addresses(if any). */ 519 in6_restoremkludge(ia, ifp); 520 521 bzero(&mltmask, sizeof(mltmask)); 522 mltmask.sin6_len = sizeof(struct sockaddr_in6); 523 mltmask.sin6_family = AF_INET6; 524 mltmask.sin6_addr = in6mask32; 525 526 /* 527 * join link-local all-nodes address 528 */ 529 bzero(&mltaddr, sizeof(mltaddr)); 530 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 531 mltaddr.sin6_family = AF_INET6; 532 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 533 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 534 rtrequest(RTM_ADD, 535 (struct sockaddr *)&mltaddr, 536 (struct sockaddr *)&ia->ia_addr, 537 (struct sockaddr *)&mltmask, 538 RTF_UP|RTF_CLONING, /* xxx */ 539 (struct rtentry **)0); 540 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 541 542 if (type == IN6_IFT_LOOP) { 543 /* 544 * join node-local all-nodes address 545 */ 546 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 547 rtrequest(RTM_ADD, 548 (struct sockaddr *)&mltaddr, 549 (struct sockaddr *)&ib->ia_addr, 550 (struct sockaddr *)&mltmask, 551 RTF_UP, 552 (struct rtentry **)0); 553 (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 554 } else { 555 /* 556 * join solicited multicast address 557 */ 558 bzero(&llsol, sizeof(llsol)); 559 llsol.s6_addr16[0] = htons(0xff02); 560 llsol.s6_addr16[1] = htons(ifp->if_index); 561 llsol.s6_addr32[1] = 0; 562 llsol.s6_addr32[2] = htonl(1); 563 llsol.s6_addr32[3] = ia->ia_addr.sin6_addr.s6_addr32[3]; 564 llsol.s6_addr8[12] = 0xff; 565 (void)in6_addmulti(&llsol, ifp, &error); 566 } 567 } 568 569 /* update dynamically. */ 570 if (in6_maxmtu < ifp->if_mtu) 571 in6_maxmtu = ifp->if_mtu; 572 573 if (in6_ifstat[ifp->if_index] == NULL) { 574 in6_ifstat[ifp->if_index] = (struct in6_ifstat *) 575 malloc(sizeof(struct in6_ifstat), M_IFADDR, M_WAITOK); 576 bzero(in6_ifstat[ifp->if_index], sizeof(struct in6_ifstat)); 577 } 578 if (icmp6_ifstat[ifp->if_index] == NULL) { 579 icmp6_ifstat[ifp->if_index] = (struct icmp6_ifstat *) 580 malloc(sizeof(struct icmp6_ifstat), M_IFADDR, M_WAITOK); 581 bzero(icmp6_ifstat[ifp->if_index], sizeof(struct icmp6_ifstat)); 582 } 583 584 /* initialize NDP variables */ 585 nd6_ifattach(ifp); 586 587 /* mark the address TENTATIVE, if needed. */ 588 switch (ifp->if_type) { 589 case IFT_ARCNET: 590 case IFT_ETHER: 591 case IFT_FDDI: 592 #if 0 593 case IFT_ATM: 594 case IFT_SLIP: 595 case IFT_PPP: 596 #endif 597 ia->ia6_flags |= IN6_IFF_TENTATIVE; 598 /* nd6_dad_start() will be called in in6_if_up */ 599 break; 600 case IFT_GIF: /*XXX*/ 601 case IFT_LOOP: 602 case IFT_FAITH: 603 default: 604 break; 605 } 606 607 return; 608 } 609 610 void 611 in6_ifdetach(ifp) 612 struct ifnet *ifp; 613 { 614 struct in6_ifaddr *ia, *oia; 615 struct ifaddr *ifa; 616 struct rtentry *rt; 617 short rtflags; 618 619 for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) 620 { 621 if (ifa->ifa_addr->sa_family != AF_INET6 622 || !IN6_IS_ADDR_LINKLOCAL(&satosin6(&ifa->ifa_addr)->sin6_addr)) { 623 continue; 624 } 625 626 ia = (struct in6_ifaddr *)ifa; 627 628 /* remove from the routing table */ 629 if ((ia->ia_flags & IFA_ROUTE) 630 && (rt = rtalloc1((struct sockaddr *)&ia->ia_addr, 0))) { 631 rtflags = rt->rt_flags; 632 rtfree(rt); 633 rtrequest(RTM_DELETE, 634 (struct sockaddr *)&ia->ia_addr, 635 (struct sockaddr *)&ia->ia_addr, 636 (struct sockaddr *)&ia->ia_prefixmask, 637 rtflags, (struct rtentry **)0); 638 } 639 640 /* remove from the linked list */ 641 TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); 642 643 /* also remove from the IPv6 address chain(itojun&jinmei) */ 644 oia = ia; 645 if (oia == (ia = in6_ifaddr)) 646 in6_ifaddr = ia->ia_next; 647 else { 648 while (ia->ia_next && (ia->ia_next != oia)) 649 ia = ia->ia_next; 650 if (ia->ia_next) 651 ia->ia_next = oia->ia_next; 652 #ifdef DEBUG 653 else 654 printf("%s: didn't unlink in6ifaddr from " 655 "list\n", if_name(ifp)); 656 #endif 657 } 658 659 free(ia, M_IFADDR); 660 } 661 } 662
Indexes created Tue Sep 23 07:09:52 GMT 2025