1 /* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.9 2002/04/28 05:40:26 suz Exp $ */ 2 /* $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)in.c 8.2 (Berkeley) 11/15/93 62 */ 63 64 #include "opt_inet.h" 65 #include "opt_inet6.h" 66 67 #include <sys/param.h> 68 #include <sys/errno.h> 69 #include <sys/malloc.h> 70 #include <sys/socket.h> 71 #include <sys/socketvar.h> 72 #include <sys/sockio.h> 73 #include <sys/systm.h> 74 #include <sys/proc.h> 75 #include <sys/priv.h> 76 #include <sys/time.h> 77 #include <sys/kernel.h> 78 #include <sys/syslog.h> 79 80 #include <sys/thread2.h> 81 #include <sys/msgport2.h> 82 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 #include <net/if_dl.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_var.h> 90 #include <netinet/if_ether.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 95 #include <netinet/ip6.h> 96 #include <netinet6/ip6_var.h> 97 #include <netinet6/nd6.h> 98 #include <netinet6/mld6_var.h> 99 #include <netinet6/ip6_mroute.h> 100 #include <netinet6/in6_ifattach.h> 101 #include <netinet6/scope6_var.h> 102 #include <netinet6/in6_pcb.h> 103 #include <netinet6/in6_var.h> 104 105 #include <net/net_osdep.h> 106 107 /* 108 * Definitions of some costant IP6 addresses. 109 */ 110 const struct in6_addr kin6addr_any = IN6ADDR_ANY_INIT; 111 const struct in6_addr kin6addr_loopback = IN6ADDR_LOOPBACK_INIT; 112 const struct in6_addr kin6addr_nodelocal_allnodes = 113 IN6ADDR_NODELOCAL_ALLNODES_INIT; 114 const struct in6_addr kin6addr_linklocal_allnodes = 115 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 116 const struct in6_addr kin6addr_linklocal_allrouters = 117 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 118 119 const struct in6_addr in6mask0 = IN6MASK0; 120 const struct in6_addr in6mask32 = IN6MASK32; 121 const struct in6_addr in6mask64 = IN6MASK64; 122 const struct in6_addr in6mask96 = IN6MASK96; 123 const struct in6_addr in6mask128 = IN6MASK128; 124 125 const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6, 126 0, 0, IN6ADDR_ANY_INIT, 0}; 127 128 static int in6_lifaddr_ioctl (struct socket *, u_long, caddr_t, 129 struct ifnet *, struct thread *); 130 static int in6_ifinit (struct ifnet *, struct in6_ifaddr *, 131 struct sockaddr_in6 *, int); 132 static void in6_unlink_ifa (struct in6_ifaddr *, struct ifnet *); 133 static void in6_ifloop_request_callback(int, int, struct rt_addrinfo *, struct rtentry *, void *); 134 135 struct in6_multihead in6_multihead; /* XXX BSS initialization */ 136 137 int (*faithprefix_p)(struct in6_addr *); 138 139 /* 140 * Subroutine for in6_ifaddloop() and in6_ifremloop(). 141 * This routine does actual work. 142 */ 143 static void 144 in6_ifloop_request(int cmd, struct ifaddr *ifa) 145 { 146 struct sockaddr_in6 all1_sa; 147 struct rt_addrinfo rtinfo; 148 int error; 149 150 bzero(&all1_sa, sizeof(all1_sa)); 151 all1_sa.sin6_family = AF_INET6; 152 all1_sa.sin6_len = sizeof(struct sockaddr_in6); 153 all1_sa.sin6_addr = in6mask128; 154 155 /* 156 * We specify the address itself as the gateway, and set the 157 * RTF_LLINFO flag, so that the corresponding host route would have 158 * the flag, and thus applications that assume traditional behavior 159 * would be happy. Note that we assume the caller of the function 160 * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest, 161 * which changes the outgoing interface to the loopback interface. 162 */ 163 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 164 rtinfo.rti_info[RTAX_DST] = ifa->ifa_addr; 165 rtinfo.rti_info[RTAX_GATEWAY] = ifa->ifa_addr; 166 rtinfo.rti_info[RTAX_NETMASK] = (struct sockaddr *)&all1_sa; 167 rtinfo.rti_flags = RTF_UP|RTF_HOST|RTF_LLINFO; 168 169 error = rtrequest1_global(cmd, &rtinfo, 170 in6_ifloop_request_callback, ifa, RTREQ_PRIO_NORM); 171 if (error != 0) { 172 log(LOG_ERR, "in6_ifloop_request: " 173 "%s operation failed for %s (errno=%d)\n", 174 cmd == RTM_ADD ? "ADD" : "DELETE", 175 ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr), 176 error); 177 } 178 } 179 180 static void 181 in6_ifloop_request_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 182 struct rtentry *rt, void *arg) 183 { 184 struct ifaddr *ifa = arg; 185 186 if (error) 187 goto done; 188 189 /* 190 * Make sure rt_ifa be equal to IFA, the second argument of the 191 * function. 192 * We need this because when we refer to rt_ifa->ia6_flags in 193 * ip6_input, we assume that the rt_ifa points to the address instead 194 * of the loopback address. 195 */ 196 if (cmd == RTM_ADD && rt && ifa != rt->rt_ifa) { 197 ++rt->rt_refcnt; 198 IFAFREE(rt->rt_ifa); 199 IFAREF(ifa); 200 rt->rt_ifa = ifa; 201 --rt->rt_refcnt; 202 } 203 204 /* 205 * Report the addition/removal of the address to the routing socket. 206 * XXX: since we called rtinit for a p2p interface with a destination, 207 * we end up reporting twice in such a case. Should we rather 208 * omit the second report? 209 */ 210 if (rt) { 211 if (mycpuid == 0) 212 rt_newaddrmsg(cmd, ifa, error, rt); 213 if (cmd == RTM_DELETE) { 214 if (rt->rt_refcnt == 0) { 215 ++rt->rt_refcnt; 216 rtfree(rt); 217 } 218 } 219 } 220 done: 221 /* no way to return any new error */ 222 ; 223 } 224 225 /* 226 * Add ownaddr as loopback rtentry. We previously add the route only if 227 * necessary (ex. on a p2p link). However, since we now manage addresses 228 * separately from prefixes, we should always add the route. We can't 229 * rely on the cloning mechanism from the corresponding interface route 230 * any more. 231 */ 232 void 233 in6_ifaddloop(struct ifaddr *ifa) 234 { 235 struct rtentry *rt; 236 237 /* If there is no loopback entry, allocate one. */ 238 rt = rtpurelookup(ifa->ifa_addr); 239 if (rt == NULL || !(rt->rt_flags & RTF_HOST) || 240 !(rt->rt_ifp->if_flags & IFF_LOOPBACK)) 241 in6_ifloop_request(RTM_ADD, ifa); 242 if (rt != NULL) 243 rt->rt_refcnt--; 244 } 245 246 /* 247 * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(), 248 * if it exists. 249 */ 250 void 251 in6_ifremloop(struct ifaddr *ifa) 252 { 253 struct in6_ifaddr *ia; 254 struct rtentry *rt; 255 int ia_count = 0; 256 257 /* 258 * Some of BSD variants do not remove cloned routes 259 * from an interface direct route, when removing the direct route 260 * (see comments in net/net_osdep.h). Even for variants that do remove 261 * cloned routes, they could fail to remove the cloned routes when 262 * we handle multple addresses that share a common prefix. 263 * So, we should remove the route corresponding to the deleted address 264 * regardless of the result of in6_is_ifloop_auto(). 265 */ 266 267 /* 268 * Delete the entry only if exact one ifa exists. More than one ifa 269 * can exist if we assign a same single address to multiple 270 * (probably p2p) interfaces. 271 * XXX: we should avoid such a configuration in IPv6... 272 */ 273 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 274 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) { 275 ia_count++; 276 if (ia_count > 1) 277 break; 278 } 279 } 280 281 if (ia_count == 1) { 282 /* 283 * Before deleting, check if a corresponding loopbacked host 284 * route surely exists. With this check, we can avoid to 285 * delete an interface direct route whose destination is same 286 * as the address being removed. This can happen when remofing 287 * a subnet-router anycast address on an interface attahced 288 * to a shared medium. 289 */ 290 rt = rtpurelookup(ifa->ifa_addr); 291 if (rt != NULL && (rt->rt_flags & RTF_HOST) && 292 (rt->rt_ifp->if_flags & IFF_LOOPBACK)) { 293 rt->rt_refcnt--; 294 in6_ifloop_request(RTM_DELETE, ifa); 295 } 296 } 297 } 298 299 int 300 in6_ifindex2scopeid(int idx) 301 { 302 struct ifnet *ifp; 303 struct sockaddr_in6 *sin6; 304 struct ifaddr_container *ifac; 305 306 if (idx < 0 || if_index < idx) 307 return -1; 308 ifp = ifindex2ifnet[idx]; 309 310 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) 311 { 312 struct ifaddr *ifa = ifac->ifa; 313 314 if (ifa->ifa_addr->sa_family != AF_INET6) 315 continue; 316 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 317 if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) 318 return sin6->sin6_scope_id & 0xffff; 319 } 320 321 return -1; 322 } 323 324 int 325 in6_mask2len(struct in6_addr *mask, u_char *lim0) 326 { 327 int x = 0, y; 328 u_char *lim = lim0, *p; 329 330 if (lim0 == NULL || 331 lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */ 332 lim = (u_char *)mask + sizeof(*mask); 333 for (p = (u_char *)mask; p < lim; x++, p++) { 334 if (*p != 0xff) 335 break; 336 } 337 y = 0; 338 if (p < lim) { 339 for (y = 0; y < 8; y++) { 340 if ((*p & (0x80 >> y)) == 0) 341 break; 342 } 343 } 344 345 /* 346 * when the limit pointer is given, do a stricter check on the 347 * remaining bits. 348 */ 349 if (p < lim) { 350 if (y != 0 && (*p & (0x00ff >> y)) != 0) 351 return (-1); 352 for (p = p + 1; p < lim; p++) 353 if (*p != 0) 354 return (-1); 355 } 356 357 return x * 8 + y; 358 } 359 360 void 361 in6_len2mask(struct in6_addr *mask, int len) 362 { 363 int i; 364 365 bzero(mask, sizeof(*mask)); 366 for (i = 0; i < len / 8; i++) 367 mask->s6_addr8[i] = 0xff; 368 if (len % 8) 369 mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff; 370 } 371 372 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 373 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 374 375 void 376 in6_control_dispatch(netmsg_t msg) 377 { 378 int error; 379 380 error = in6_control(msg->control.base.nm_so, 381 msg->control.nm_cmd, 382 msg->control.nm_data, 383 msg->control.nm_ifp, 384 msg->control.nm_td); 385 lwkt_replymsg(&msg->control.base.lmsg, error); 386 } 387 388 int 389 in6_control(struct socket *so, u_long cmd, caddr_t data, 390 struct ifnet *ifp, struct thread *td) 391 { 392 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 393 struct in6_ifaddr *ia = NULL; 394 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 395 struct in6_ifextra *xtra; 396 int privileged; 397 int error; 398 399 privileged = 0; 400 if (priv_check(td, PRIV_ROOT) == 0) 401 privileged++; 402 403 switch (cmd) { 404 case SIOCGETSGCNT_IN6: 405 case SIOCGETMIFCNT_IN6: 406 return (mrt6_ioctl(cmd, data)); 407 } 408 409 switch(cmd) { 410 case SIOCAADDRCTL_POLICY: 411 case SIOCDADDRCTL_POLICY: 412 if (!privileged) 413 return (EPERM); 414 return (in6_src_ioctl(cmd, data)); 415 } 416 417 if (ifp == NULL) 418 return (EOPNOTSUPP); 419 420 switch (cmd) { 421 case SIOCSNDFLUSH_IN6: 422 case SIOCSPFXFLUSH_IN6: 423 case SIOCSRTRFLUSH_IN6: 424 case SIOCSDEFIFACE_IN6: 425 case SIOCSIFINFO_FLAGS: 426 if (!privileged) 427 return (EPERM); 428 /* fall through */ 429 case OSIOCGIFINFO_IN6: 430 case SIOCGIFINFO_IN6: 431 case SIOCGDRLST_IN6: 432 case SIOCGPRLST_IN6: 433 case SIOCGNBRINFO_IN6: 434 case SIOCGDEFIFACE_IN6: 435 return (nd6_ioctl(cmd, data, ifp)); 436 } 437 438 switch (cmd) { 439 case SIOCSIFPREFIX_IN6: 440 case SIOCDIFPREFIX_IN6: 441 case SIOCAIFPREFIX_IN6: 442 case SIOCCIFPREFIX_IN6: 443 case SIOCSGIFPREFIX_IN6: 444 case SIOCGIFPREFIX_IN6: 445 log(LOG_NOTICE, 446 "prefix ioctls are now invalidated. " 447 "please use ifconfig.\n"); 448 return (EOPNOTSUPP); 449 } 450 451 switch (cmd) { 452 case SIOCSSCOPE6: 453 if (!privileged) 454 return (EPERM); 455 return (scope6_set(ifp, 456 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 457 break; 458 case SIOCGSCOPE6: 459 return (scope6_get(ifp, 460 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 461 break; 462 case SIOCGSCOPE6DEF: 463 return (scope6_get_default((struct scope6_id *) 464 ifr->ifr_ifru.ifru_scope_id)); 465 break; 466 } 467 468 switch (cmd) { 469 case SIOCALIFADDR: 470 case SIOCDLIFADDR: 471 if (!privileged) 472 return (EPERM); 473 /* fall through */ 474 case SIOCGLIFADDR: 475 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 476 } 477 478 /* 479 * Find address for this interface, if it exists. 480 */ 481 if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */ 482 struct sockaddr_in6 *sa6 = 483 (struct sockaddr_in6 *)&ifra->ifra_addr; 484 485 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { 486 if (sa6->sin6_addr.s6_addr16[1] == 0) { 487 /* link ID is not embedded by the user */ 488 sa6->sin6_addr.s6_addr16[1] = 489 htons(ifp->if_index); 490 } else if (sa6->sin6_addr.s6_addr16[1] != 491 htons(ifp->if_index)) { 492 return (EINVAL); /* link ID contradicts */ 493 } 494 if (sa6->sin6_scope_id) { 495 if (sa6->sin6_scope_id != 496 (u_int32_t)ifp->if_index) 497 return (EINVAL); 498 sa6->sin6_scope_id = 0; /* XXX: good way? */ 499 } 500 } 501 ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr); 502 } 503 504 switch (cmd) { 505 case SIOCSIFADDR_IN6: 506 case SIOCSIFDSTADDR_IN6: 507 case SIOCSIFNETMASK_IN6: 508 /* 509 * Since IPv6 allows a node to assign multiple addresses 510 * on a single interface, SIOCSIFxxx ioctls are not suitable 511 * and should be unused. 512 */ 513 /* we decided to obsolete this command (20000704) */ 514 return (EINVAL); 515 516 case SIOCDIFADDR_IN6: 517 /* 518 * for IPv4, we look for existing in_ifaddr here to allow 519 * "ifconfig if0 delete" to remove first IPv4 address on the 520 * interface. For IPv6, as the spec allow multiple interface 521 * address from the day one, we consider "remove the first one" 522 * semantics to be not preferable. 523 */ 524 if (ia == NULL) 525 return (EADDRNOTAVAIL); 526 /* FALLTHROUGH */ 527 case SIOCAIFADDR_IN6: 528 /* 529 * We always require users to specify a valid IPv6 address for 530 * the corresponding operation. 531 */ 532 if (ifra->ifra_addr.sin6_family != AF_INET6 || 533 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) 534 return (EAFNOSUPPORT); 535 if (!privileged) 536 return (EPERM); 537 538 break; 539 540 case SIOCGIFADDR_IN6: 541 /* This interface is basically deprecated. use SIOCGIFCONF. */ 542 /* fall through */ 543 case SIOCGIFAFLAG_IN6: 544 case SIOCGIFNETMASK_IN6: 545 case SIOCGIFDSTADDR_IN6: 546 case SIOCGIFALIFETIME_IN6: 547 /* must think again about its semantics */ 548 if (ia == NULL) 549 return (EADDRNOTAVAIL); 550 break; 551 case SIOCSIFALIFETIME_IN6: 552 { 553 struct in6_addrlifetime *lt; 554 555 if (!privileged) 556 return (EPERM); 557 if (ia == NULL) 558 return (EADDRNOTAVAIL); 559 /* sanity for overflow - beware unsigned */ 560 lt = &ifr->ifr_ifru.ifru_lifetime; 561 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME 562 && lt->ia6t_vltime + time_uptime < time_uptime) { 563 return EINVAL; 564 } 565 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME 566 && lt->ia6t_pltime + time_uptime < time_uptime) { 567 return EINVAL; 568 } 569 break; 570 } 571 } 572 573 switch (cmd) { 574 575 case SIOCGIFADDR_IN6: 576 ifr->ifr_addr = ia->ia_addr; 577 break; 578 579 case SIOCGIFDSTADDR_IN6: 580 if (!(ifp->if_flags & IFF_POINTOPOINT)) 581 return (EINVAL); 582 /* 583 * XXX: should we check if ifa_dstaddr is NULL and return 584 * an error? 585 */ 586 ifr->ifr_dstaddr = ia->ia_dstaddr; 587 break; 588 589 case SIOCGIFNETMASK_IN6: 590 ifr->ifr_addr = ia->ia_prefixmask; 591 break; 592 593 case SIOCGIFAFLAG_IN6: 594 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 595 break; 596 597 case SIOCGIFSTAT_IN6: 598 if (ifp == NULL || (xtra = ifp->if_afdata[AF_INET6]) == NULL) 599 return EINVAL; 600 bzero(&ifr->ifr_ifru.ifru_stat, 601 sizeof(ifr->ifr_ifru.ifru_stat)); 602 ifr->ifr_ifru.ifru_stat = *xtra->in6_ifstat; 603 break; 604 605 case SIOCGIFSTAT_ICMP6: 606 if (ifp == NULL || (xtra = ifp->if_afdata[AF_INET6]) == NULL) 607 return EINVAL; 608 bzero(&ifr->ifr_ifru.ifru_stat, 609 sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 610 ifr->ifr_ifru.ifru_icmp6stat = *xtra->icmp6_ifstat; 611 break; 612 613 case SIOCSIFADDR: 614 case SIOCSIFDSTADDR: 615 case SIOCSIFBRDADDR: 616 case SIOCSIFNETMASK: 617 /* 618 * Do not pass those ioctl to driver handler since they are not 619 * properly setup. Instead just error out. 620 */ 621 return (EOPNOTSUPP); 622 623 case SIOCGIFALIFETIME_IN6: 624 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 625 break; 626 627 case SIOCSIFALIFETIME_IN6: 628 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 629 /* for sanity */ 630 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 631 ia->ia6_lifetime.ia6t_expire = 632 time_uptime + ia->ia6_lifetime.ia6t_vltime; 633 } else 634 ia->ia6_lifetime.ia6t_expire = 0; 635 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 636 ia->ia6_lifetime.ia6t_preferred = 637 time_uptime + ia->ia6_lifetime.ia6t_pltime; 638 } else 639 ia->ia6_lifetime.ia6t_preferred = 0; 640 break; 641 642 case SIOCAIFADDR_IN6: 643 { 644 int i, error = 0, iaIsNew; 645 struct nd_prefix pr0, *pr; 646 647 if (ia != NULL) 648 iaIsNew = 0; 649 else 650 iaIsNew = 1; 651 652 /* 653 * first, make or update the interface address structure, 654 * and link it to the list. 655 */ 656 if ((error = in6_update_ifa(ifp, ifra, ia)) != 0) 657 return (error); 658 659 /* 660 * then, make the prefix on-link on the interface. 661 * XXX: we'd rather create the prefix before the address, but 662 * we need at least one address to install the corresponding 663 * interface route, so we configure the address first. 664 */ 665 666 /* 667 * convert mask to prefix length (prefixmask has already 668 * been validated in in6_update_ifa(). 669 */ 670 bzero(&pr0, sizeof(pr0)); 671 pr0.ndpr_ifp = ifp; 672 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 673 NULL); 674 if (pr0.ndpr_plen == 128) 675 break; /* we don't need to install a host route. */ 676 pr0.ndpr_prefix = ifra->ifra_addr; 677 pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; 678 /* apply the mask for safety. */ 679 for (i = 0; i < 4; i++) { 680 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 681 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 682 } 683 /* 684 * XXX: since we don't have an API to set prefix (not address) 685 * lifetimes, we just use the same lifetimes as addresses. 686 * The (temporarily) installed lifetimes can be overridden by 687 * later advertised RAs (when accept_rtadv is non 0), which is 688 * an intended behavior. 689 */ 690 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 691 pr0.ndpr_raf_auto = 692 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 693 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 694 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 695 696 /* add the prefix if there's one. */ 697 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 698 /* 699 * nd6_prelist_add will install the corresponding 700 * interface route. 701 */ 702 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 703 return (error); 704 if (pr == NULL) { 705 log(LOG_ERR, "nd6_prelist_add succeeded but " 706 "no prefix\n"); 707 return (EINVAL); /* XXX panic here? */ 708 } 709 } 710 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 711 == NULL) { 712 /* XXX: this should not happen! */ 713 log(LOG_ERR, "in6_control: addition succeeded, but" 714 " no ifaddr\n"); 715 } else { 716 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 717 ia->ia6_ndpr == NULL) { /* new autoconfed addr */ 718 ia->ia6_ndpr = pr; 719 pr->ndpr_refcnt++; 720 721 /* 722 * If this is the first autoconf address from 723 * the prefix, create a temporary address 724 * as well (when specified). 725 */ 726 if (ip6_use_tempaddr && 727 pr->ndpr_refcnt == 1) { 728 int e; 729 if ((e = in6_tmpifadd(ia, 1)) != 0) { 730 log(LOG_NOTICE, "in6_control: " 731 "failed to create a " 732 "temporary address, " 733 "errno=%d\n", 734 e); 735 } 736 } 737 } 738 739 /* 740 * this might affect the status of autoconfigured 741 * addresses, that is, this address might make 742 * other addresses detached. 743 */ 744 pfxlist_onlink_check(); 745 } 746 if (error == 0 && ia) { 747 EVENTHANDLER_INVOKE(ifaddr_event, ifp, 748 iaIsNew ? IFADDR_EVENT_ADD : IFADDR_EVENT_CHANGE, 749 &ia->ia_ifa); 750 } 751 break; 752 } 753 754 case SIOCDIFADDR_IN6: 755 { 756 int i = 0; 757 struct nd_prefix pr0, *pr; 758 759 /* 760 * If the address being deleted is the only one that owns 761 * the corresponding prefix, expire the prefix as well. 762 * XXX: theoretically, we don't have to warry about such 763 * relationship, since we separate the address management 764 * and the prefix management. We do this, however, to provide 765 * as much backward compatibility as possible in terms of 766 * the ioctl operation. 767 */ 768 bzero(&pr0, sizeof(pr0)); 769 pr0.ndpr_ifp = ifp; 770 pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, 771 NULL); 772 if (pr0.ndpr_plen == 128) 773 goto purgeaddr; 774 pr0.ndpr_prefix = ia->ia_addr; 775 pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; 776 for (i = 0; i < 4; i++) { 777 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 778 ia->ia_prefixmask.sin6_addr.s6_addr32[i]; 779 } 780 /* 781 * The logic of the following condition is a bit complicated. 782 * We expire the prefix when 783 * 1. the address obeys autoconfiguration and it is the 784 * only owner of the associated prefix, or 785 * 2. the address does not obey autoconf and there is no 786 * other owner of the prefix. 787 */ 788 if ((pr = nd6_prefix_lookup(&pr0)) != NULL && 789 (((ia->ia6_flags & IN6_IFF_AUTOCONF) && 790 pr->ndpr_refcnt == 1) || 791 (!(ia->ia6_flags & IN6_IFF_AUTOCONF) && 792 pr->ndpr_refcnt == 0))) { 793 pr->ndpr_expire = 1; /* XXX: just for expiration */ 794 } 795 796 purgeaddr: 797 EVENTHANDLER_INVOKE(ifaddr_event, ifp, IFADDR_EVENT_DELETE, 798 &ia->ia_ifa); 799 in6_purgeaddr(&ia->ia_ifa); 800 break; 801 } 802 803 default: 804 if (ifp == NULL || ifp->if_ioctl == NULL) 805 return (EOPNOTSUPP); 806 ifnet_serialize_all(ifp); 807 error = ifp->if_ioctl(ifp, cmd, data, td->td_proc->p_ucred); 808 ifnet_deserialize_all(ifp); 809 return (error); 810 } 811 812 return (0); 813 } 814 815 /* 816 * Update parameters of an IPv6 interface address. 817 * If necessary, a new entry is created and linked into address chains. 818 * This function is separated from in6_control(). 819 * XXX: should this be performed under splnet()? 820 */ 821 int 822 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 823 struct in6_ifaddr *ia) 824 { 825 int error = 0, hostIsNew = 0, plen = -1; 826 struct in6_ifaddr *oia; 827 struct sockaddr_in6 dst6; 828 struct in6_addrlifetime *lt; 829 830 /* Validate parameters */ 831 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 832 return (EINVAL); 833 834 /* 835 * The destination address for a p2p link must have a family 836 * of AF_UNSPEC or AF_INET6. 837 */ 838 if ((ifp->if_flags & IFF_POINTOPOINT) && 839 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 840 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 841 return (EAFNOSUPPORT); 842 /* 843 * validate ifra_prefixmask. don't check sin6_family, netmask 844 * does not carry fields other than sin6_len. 845 */ 846 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 847 return (EINVAL); 848 /* 849 * Because the IPv6 address architecture is classless, we require 850 * users to specify a (non 0) prefix length (mask) for a new address. 851 * We also require the prefix (when specified) mask is valid, and thus 852 * reject a non-consecutive mask. 853 */ 854 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 855 return (EINVAL); 856 if (ifra->ifra_prefixmask.sin6_len != 0) { 857 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 858 (u_char *)&ifra->ifra_prefixmask + 859 ifra->ifra_prefixmask.sin6_len); 860 if (plen <= 0) 861 return (EINVAL); 862 } 863 else { 864 /* 865 * In this case, ia must not be NULL. We just use its prefix 866 * length. 867 */ 868 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 869 } 870 /* 871 * If the destination address on a p2p interface is specified, 872 * and the address is a scoped one, validate/set the scope 873 * zone identifier. 874 */ 875 dst6 = ifra->ifra_dstaddr; 876 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) && 877 (dst6.sin6_family == AF_INET6)) { 878 int scopeid; 879 880 if ((error = in6_recoverscope(&dst6, 881 &ifra->ifra_dstaddr.sin6_addr, 882 ifp)) != 0) 883 return (error); 884 scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr); 885 if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */ 886 dst6.sin6_scope_id = scopeid; 887 else if (dst6.sin6_scope_id != scopeid) 888 return (EINVAL); /* scope ID mismatch. */ 889 if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL)) 890 != 0) 891 return (error); 892 dst6.sin6_scope_id = 0; /* XXX */ 893 } 894 /* 895 * The destination address can be specified only for a p2p or a 896 * loopback interface. If specified, the corresponding prefix length 897 * must be 128. 898 */ 899 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 900 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) == 0) { 901 /* XXX: noisy message */ 902 log(LOG_INFO, "in6_update_ifa: a destination can be " 903 "specified for a p2p or a loopback IF only\n"); 904 return (EINVAL); 905 } 906 if (plen != 128) { 907 /* 908 * The following message seems noisy, but we dare to 909 * add it for diagnosis. 910 */ 911 log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 " 912 "when dstaddr is specified\n"); 913 return (EINVAL); 914 } 915 } 916 /* lifetime consistency check */ 917 lt = &ifra->ifra_lifetime; 918 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME 919 && lt->ia6t_vltime + time_uptime < time_uptime) { 920 return EINVAL; 921 } 922 if (lt->ia6t_vltime == 0) { 923 /* 924 * the following log might be noisy, but this is a typical 925 * configuration mistake or a tool's bug. 926 */ 927 log(LOG_INFO, 928 "in6_update_ifa: valid lifetime is 0 for %s\n", 929 ip6_sprintf(&ifra->ifra_addr.sin6_addr)); 930 } 931 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME 932 && lt->ia6t_pltime + time_uptime < time_uptime) { 933 return EINVAL; 934 } 935 936 /* 937 * If this is a new address, allocate a new ifaddr and link it 938 * into chains. 939 */ 940 if (ia == NULL) { 941 hostIsNew = 1; 942 /* 943 * When in6_update_ifa() is called in a process of a received 944 * RA, it is called under splnet(). So, we should call malloc 945 * with M_NOWAIT. 946 */ 947 ia = ifa_create(sizeof(*ia), M_NOWAIT); 948 if (ia == NULL) 949 return (ENOBUFS); 950 /* Initialize the address and masks */ 951 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 952 ia->ia_addr.sin6_family = AF_INET6; 953 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 954 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 955 /* 956 * XXX: some functions expect that ifa_dstaddr is not 957 * NULL for p2p interfaces. 958 */ 959 ia->ia_ifa.ifa_dstaddr 960 = (struct sockaddr *)&ia->ia_dstaddr; 961 } else { 962 ia->ia_ifa.ifa_dstaddr = NULL; 963 } 964 ia->ia_ifa.ifa_netmask 965 = (struct sockaddr *)&ia->ia_prefixmask; 966 967 ia->ia_ifp = ifp; 968 if ((oia = in6_ifaddr) != NULL) { 969 for ( ; oia->ia_next; oia = oia->ia_next) 970 continue; 971 oia->ia_next = ia; 972 } else 973 in6_ifaddr = ia; 974 975 ifa_iflink(&ia->ia_ifa, ifp, 1); 976 } 977 978 /* set prefix mask */ 979 if (ifra->ifra_prefixmask.sin6_len) { 980 /* 981 * We prohibit changing the prefix length of an existing 982 * address, because 983 * + such an operation should be rare in IPv6, and 984 * + the operation would confuse prefix management. 985 */ 986 if (ia->ia_prefixmask.sin6_len && 987 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 988 log(LOG_INFO, "in6_update_ifa: the prefix length of an" 989 " existing (%s) address should not be changed\n", 990 ip6_sprintf(&ia->ia_addr.sin6_addr)); 991 error = EINVAL; 992 goto unlink; 993 } 994 ia->ia_prefixmask = ifra->ifra_prefixmask; 995 } 996 997 /* 998 * If a new destination address is specified, scrub the old one and 999 * install the new destination. Note that the interface must be 1000 * p2p or loopback (see the check above.) 1001 */ 1002 if (dst6.sin6_family == AF_INET6 && 1003 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, 1004 &ia->ia_dstaddr.sin6_addr)) { 1005 int e; 1006 1007 if ((ia->ia_flags & IFA_ROUTE) && 1008 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) 1009 != 0) { 1010 log(LOG_ERR, "in6_update_ifa: failed to remove " 1011 "a route to the old destination: %s\n", 1012 ip6_sprintf(&ia->ia_addr.sin6_addr)); 1013 /* proceed anyway... */ 1014 } 1015 else 1016 ia->ia_flags &= ~IFA_ROUTE; 1017 ia->ia_dstaddr = dst6; 1018 } 1019 1020 /* reset the interface and routing table appropriately. */ 1021 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 1022 goto unlink; 1023 1024 /* 1025 * Beyond this point, we should call in6_purgeaddr upon an error, 1026 * not just go to unlink. 1027 */ 1028 1029 #if 0 /* disable this mechanism for now */ 1030 /* update prefix list */ 1031 if (hostIsNew && 1032 (ifra->ifra_flags & IN6_IFF_NOPFX) == 0) { /* XXX */ 1033 int iilen; 1034 1035 iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen; 1036 if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) { 1037 in6_purgeaddr((struct ifaddr *)ia); 1038 return (error); 1039 } 1040 } 1041 #endif 1042 1043 if (ifp->if_flags & IFF_MULTICAST) { 1044 struct sockaddr_in6 mltaddr, mltmask; 1045 struct in6_multi *in6m; 1046 1047 if (hostIsNew) { 1048 /* 1049 * join solicited multicast addr for new host id 1050 */ 1051 struct in6_addr llsol; 1052 bzero(&llsol, sizeof(struct in6_addr)); 1053 llsol.s6_addr16[0] = htons(0xff02); 1054 llsol.s6_addr16[1] = htons(ifp->if_index); 1055 llsol.s6_addr32[1] = 0; 1056 llsol.s6_addr32[2] = htonl(1); 1057 llsol.s6_addr32[3] = 1058 ifra->ifra_addr.sin6_addr.s6_addr32[3]; 1059 llsol.s6_addr8[12] = 0xff; 1060 in6_addmulti(&llsol, ifp, &error); 1061 if (error != 0) { 1062 log(LOG_WARNING, 1063 "in6_update_ifa: addmulti failed for " 1064 "%s on %s (errno=%d)\n", 1065 ip6_sprintf(&llsol), if_name(ifp), 1066 error); 1067 in6_purgeaddr((struct ifaddr *)ia); 1068 return (error); 1069 } 1070 } 1071 1072 bzero(&mltmask, sizeof(mltmask)); 1073 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1074 mltmask.sin6_family = AF_INET6; 1075 mltmask.sin6_addr = in6mask32; 1076 1077 /* 1078 * join link-local all-nodes address 1079 */ 1080 bzero(&mltaddr, sizeof(mltaddr)); 1081 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1082 mltaddr.sin6_family = AF_INET6; 1083 mltaddr.sin6_addr = kin6addr_linklocal_allnodes; 1084 mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); 1085 1086 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 1087 if (in6m == NULL) { 1088 rtrequest_global(RTM_ADD, 1089 (struct sockaddr *)&mltaddr, 1090 (struct sockaddr *)&ia->ia_addr, 1091 (struct sockaddr *)&mltmask, 1092 RTF_UP|RTF_CLONING); /* xxx */ 1093 in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 1094 if (error != 0) { 1095 log(LOG_WARNING, 1096 "in6_update_ifa: addmulti failed for " 1097 "%s on %s (errno=%d)\n", 1098 ip6_sprintf(&mltaddr.sin6_addr), 1099 if_name(ifp), error); 1100 } 1101 } 1102 1103 /* 1104 * join node information group address 1105 */ 1106 #define hostnamelen strlen(hostname) 1107 if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr) 1108 == 0) { 1109 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 1110 if (in6m == NULL && ia != NULL) { 1111 in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 1112 if (error != 0) { 1113 log(LOG_WARNING, "in6_update_ifa: " 1114 "addmulti failed for " 1115 "%s on %s (errno=%d)\n", 1116 ip6_sprintf(&mltaddr.sin6_addr), 1117 if_name(ifp), error); 1118 } 1119 } 1120 } 1121 #undef hostnamelen 1122 1123 /* 1124 * join node-local all-nodes address, on loopback. 1125 * XXX: since "node-local" is obsoleted by interface-local, 1126 * we have to join the group on every interface with 1127 * some interface-boundary restriction. 1128 */ 1129 if (ifp->if_flags & IFF_LOOPBACK) { 1130 struct in6_ifaddr *ia_loop; 1131 1132 struct in6_addr loop6 = kin6addr_loopback; 1133 ia_loop = in6ifa_ifpwithaddr(ifp, &loop6); 1134 1135 mltaddr.sin6_addr = kin6addr_nodelocal_allnodes; 1136 1137 IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m); 1138 if (in6m == NULL && ia_loop != NULL) { 1139 rtrequest_global(RTM_ADD, 1140 (struct sockaddr *)&mltaddr, 1141 (struct sockaddr *)&ia_loop->ia_addr, 1142 (struct sockaddr *)&mltmask, 1143 RTF_UP); 1144 in6_addmulti(&mltaddr.sin6_addr, ifp, &error); 1145 if (error != 0) { 1146 log(LOG_WARNING, "in6_update_ifa: " 1147 "addmulti failed for %s on %s " 1148 "(errno=%d)\n", 1149 ip6_sprintf(&mltaddr.sin6_addr), 1150 if_name(ifp), error); 1151 } 1152 } 1153 } 1154 } 1155 1156 ia->ia6_flags = ifra->ifra_flags; 1157 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/ 1158 ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */ 1159 1160 ia->ia6_lifetime = ifra->ifra_lifetime; 1161 /* for sanity */ 1162 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1163 ia->ia6_lifetime.ia6t_expire = 1164 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1165 } else 1166 ia->ia6_lifetime.ia6t_expire = 0; 1167 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1168 ia->ia6_lifetime.ia6t_preferred = 1169 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1170 } else 1171 ia->ia6_lifetime.ia6t_preferred = 0; 1172 1173 /* 1174 * Perform DAD, if needed. 1175 * XXX It may be of use, if we can administratively 1176 * disable DAD. 1177 */ 1178 if (in6if_do_dad(ifp) && !(ifra->ifra_flags & IN6_IFF_NODAD)) { 1179 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1180 nd6_dad_start((struct ifaddr *)ia, NULL); 1181 } 1182 1183 return (error); 1184 1185 unlink: 1186 /* 1187 * XXX: if a change of an existing address failed, keep the entry 1188 * anyway. 1189 */ 1190 if (hostIsNew) 1191 in6_unlink_ifa(ia, ifp); 1192 return (error); 1193 } 1194 1195 void 1196 in6_purgeaddr(struct ifaddr *ifa) 1197 { 1198 struct ifnet *ifp = ifa->ifa_ifp; 1199 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1200 1201 /* stop DAD processing */ 1202 nd6_dad_stop(ifa); 1203 1204 /* 1205 * delete route to the destination of the address being purged. 1206 * The interface must be p2p or loopback in this case. 1207 */ 1208 if ((ia->ia_flags & IFA_ROUTE) && ia->ia_dstaddr.sin6_len != 0) { 1209 int e; 1210 1211 if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) 1212 != 0) { 1213 log(LOG_ERR, "in6_purgeaddr: failed to remove " 1214 "a route to the p2p destination: %s on %s, " 1215 "errno=%d\n", 1216 ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp), 1217 e); 1218 /* proceed anyway... */ 1219 } 1220 else 1221 ia->ia_flags &= ~IFA_ROUTE; 1222 } 1223 1224 /* Remove ownaddr's loopback rtentry, if it exists. */ 1225 in6_ifremloop(&(ia->ia_ifa)); 1226 1227 if (ifp->if_flags & IFF_MULTICAST) { 1228 /* 1229 * delete solicited multicast addr for deleting host id 1230 */ 1231 struct in6_multi *in6m; 1232 struct in6_addr llsol; 1233 bzero(&llsol, sizeof(struct in6_addr)); 1234 llsol.s6_addr16[0] = htons(0xff02); 1235 llsol.s6_addr16[1] = htons(ifp->if_index); 1236 llsol.s6_addr32[1] = 0; 1237 llsol.s6_addr32[2] = htonl(1); 1238 llsol.s6_addr32[3] = 1239 ia->ia_addr.sin6_addr.s6_addr32[3]; 1240 llsol.s6_addr8[12] = 0xff; 1241 1242 IN6_LOOKUP_MULTI(llsol, ifp, in6m); 1243 if (in6m) 1244 in6_delmulti(in6m); 1245 } 1246 1247 in6_unlink_ifa(ia, ifp); 1248 } 1249 1250 static void 1251 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1252 { 1253 int plen, iilen; 1254 struct in6_ifaddr *oia; 1255 1256 crit_enter(); 1257 1258 ifa_ifunlink(&ia->ia_ifa, ifp); 1259 1260 oia = ia; 1261 if (oia == (ia = in6_ifaddr)) 1262 in6_ifaddr = ia->ia_next; 1263 else { 1264 while (ia->ia_next && (ia->ia_next != oia)) 1265 ia = ia->ia_next; 1266 if (ia->ia_next) 1267 ia->ia_next = oia->ia_next; 1268 else { 1269 /* search failed */ 1270 kprintf("Couldn't unlink in6_ifaddr from in6_ifaddr\n"); 1271 } 1272 } 1273 1274 if (oia->ia6_ifpr) { /* check for safety */ 1275 plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL); 1276 iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen; 1277 in6_prefix_remove_ifid(iilen, oia); 1278 } 1279 1280 /* 1281 * When an autoconfigured address is being removed, release the 1282 * reference to the base prefix. Also, since the release might 1283 * affect the status of other (detached) addresses, call 1284 * pfxlist_onlink_check(). 1285 */ 1286 if (oia->ia6_flags & IN6_IFF_AUTOCONF) { 1287 if (oia->ia6_ndpr == NULL) { 1288 log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address " 1289 "%p has no prefix\n", oia); 1290 } else { 1291 oia->ia6_ndpr->ndpr_refcnt--; 1292 oia->ia6_flags &= ~IN6_IFF_AUTOCONF; 1293 oia->ia6_ndpr = NULL; 1294 } 1295 1296 pfxlist_onlink_check(); 1297 } 1298 1299 /* 1300 * release another refcnt for the link from in6_ifaddr. 1301 * Note that we should decrement the refcnt at least once for all *BSD. 1302 */ 1303 ifa_destroy(&oia->ia_ifa); 1304 1305 crit_exit(); 1306 } 1307 1308 void 1309 in6_purgeif(struct ifnet *ifp) 1310 { 1311 struct ifaddr_container *ifac, *next; 1312 1313 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid], 1314 ifa_link, next) { 1315 if (ifac->ifa->ifa_addr->sa_family != AF_INET6) 1316 continue; 1317 in6_purgeaddr(ifac->ifa); 1318 } 1319 1320 in6_ifdetach(ifp); 1321 } 1322 1323 /* 1324 * SIOC[GAD]LIFADDR. 1325 * SIOCGLIFADDR: get first address. (?) 1326 * SIOCGLIFADDR with IFLR_PREFIX: 1327 * get first address that matches the specified prefix. 1328 * SIOCALIFADDR: add the specified address. 1329 * SIOCALIFADDR with IFLR_PREFIX: 1330 * add the specified prefix, filling hostid part from 1331 * the first link-local address. prefixlen must be <= 64. 1332 * SIOCDLIFADDR: delete the specified address. 1333 * SIOCDLIFADDR with IFLR_PREFIX: 1334 * delete the first address that matches the specified prefix. 1335 * return values: 1336 * EINVAL on invalid parameters 1337 * EADDRNOTAVAIL on prefix match failed/specified address not found 1338 * other values may be returned from in6_ioctl() 1339 * 1340 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1341 * this is to accomodate address naming scheme other than RFC2374, 1342 * in the future. 1343 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1344 * address encoding scheme. (see figure on page 8) 1345 */ 1346 static int 1347 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1348 struct ifnet *ifp, struct thread *td) 1349 { 1350 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1351 struct sockaddr *sa; 1352 1353 /* sanity checks */ 1354 if (!data || !ifp) { 1355 panic("invalid argument to in6_lifaddr_ioctl"); 1356 /*NOTRECHED*/ 1357 } 1358 1359 switch (cmd) { 1360 case SIOCGLIFADDR: 1361 /* address must be specified on GET with IFLR_PREFIX */ 1362 if (!(iflr->flags & IFLR_PREFIX)) 1363 break; 1364 /* FALLTHROUGH */ 1365 case SIOCALIFADDR: 1366 case SIOCDLIFADDR: 1367 /* address must be specified on ADD and DELETE */ 1368 sa = (struct sockaddr *)&iflr->addr; 1369 if (sa->sa_family != AF_INET6) 1370 return EINVAL; 1371 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1372 return EINVAL; 1373 /* XXX need improvement */ 1374 sa = (struct sockaddr *)&iflr->dstaddr; 1375 if (sa->sa_family && sa->sa_family != AF_INET6) 1376 return EINVAL; 1377 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1378 return EINVAL; 1379 break; 1380 default: /* shouldn't happen */ 1381 #if 0 1382 panic("invalid cmd to in6_lifaddr_ioctl"); 1383 /* NOTREACHED */ 1384 #else 1385 return EOPNOTSUPP; 1386 #endif 1387 } 1388 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1389 return EINVAL; 1390 1391 switch (cmd) { 1392 case SIOCALIFADDR: 1393 { 1394 struct in6_aliasreq ifra; 1395 struct in6_addr *hostid = NULL; 1396 int prefixlen; 1397 1398 if (iflr->flags & IFLR_PREFIX) { 1399 struct ifaddr *ifa; 1400 struct sockaddr_in6 *sin6; 1401 1402 /* 1403 * hostid is to fill in the hostid part of the 1404 * address. hostid points to the first link-local 1405 * address attached to the interface. 1406 */ 1407 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1408 if (!ifa) 1409 return EADDRNOTAVAIL; 1410 hostid = IFA_IN6(ifa); 1411 1412 /* prefixlen must be <= 64. */ 1413 if (64 < iflr->prefixlen) 1414 return EINVAL; 1415 prefixlen = iflr->prefixlen; 1416 1417 /* hostid part must be zero. */ 1418 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1419 if (sin6->sin6_addr.s6_addr32[2] != 0 1420 || sin6->sin6_addr.s6_addr32[3] != 0) { 1421 return EINVAL; 1422 } 1423 } else 1424 prefixlen = iflr->prefixlen; 1425 1426 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1427 bzero(&ifra, sizeof(ifra)); 1428 bcopy(iflr->iflr_name, ifra.ifra_name, 1429 sizeof(ifra.ifra_name)); 1430 1431 bcopy(&iflr->addr, &ifra.ifra_addr, 1432 ((struct sockaddr *)&iflr->addr)->sa_len); 1433 if (hostid) { 1434 /* fill in hostid part */ 1435 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1436 hostid->s6_addr32[2]; 1437 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1438 hostid->s6_addr32[3]; 1439 } 1440 1441 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/ 1442 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1443 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1444 if (hostid) { 1445 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1446 hostid->s6_addr32[2]; 1447 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1448 hostid->s6_addr32[3]; 1449 } 1450 } 1451 1452 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1453 in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1454 1455 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1456 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1457 } 1458 case SIOCGLIFADDR: 1459 case SIOCDLIFADDR: 1460 { 1461 struct ifaddr_container *ifac; 1462 struct in6_ifaddr *ia; 1463 struct in6_addr mask, candidate, match; 1464 struct sockaddr_in6 *sin6; 1465 int cmp; 1466 1467 bzero(&mask, sizeof(mask)); 1468 if (iflr->flags & IFLR_PREFIX) { 1469 /* lookup a prefix rather than address. */ 1470 in6_len2mask(&mask, iflr->prefixlen); 1471 1472 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1473 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1474 match.s6_addr32[0] &= mask.s6_addr32[0]; 1475 match.s6_addr32[1] &= mask.s6_addr32[1]; 1476 match.s6_addr32[2] &= mask.s6_addr32[2]; 1477 match.s6_addr32[3] &= mask.s6_addr32[3]; 1478 1479 /* if you set extra bits, that's wrong */ 1480 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1481 return EINVAL; 1482 1483 cmp = 1; 1484 } else { 1485 if (cmd == SIOCGLIFADDR) { 1486 /* on getting an address, take the 1st match */ 1487 cmp = 0; /* XXX */ 1488 } else { 1489 /* on deleting an address, do exact match */ 1490 in6_len2mask(&mask, 128); 1491 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1492 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1493 1494 cmp = 1; 1495 } 1496 } 1497 1498 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1499 struct ifaddr *ifa = ifac->ifa; 1500 1501 if (ifa->ifa_addr->sa_family != AF_INET6) 1502 continue; 1503 if (!cmp) 1504 break; 1505 1506 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1507 /* 1508 * XXX: this is adhoc, but is necessary to allow 1509 * a user to specify fe80::/64 (not /10) for a 1510 * link-local address. 1511 */ 1512 if (IN6_IS_ADDR_LINKLOCAL(&candidate)) 1513 candidate.s6_addr16[1] = 0; 1514 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1515 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1516 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1517 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1518 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1519 break; 1520 } 1521 if (ifac == NULL) 1522 return EADDRNOTAVAIL; 1523 ia = ifa2ia6(ifac->ifa); 1524 1525 if (cmd == SIOCGLIFADDR) { 1526 struct sockaddr_in6 *s6; 1527 1528 /* fill in the if_laddrreq structure */ 1529 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1530 s6 = (struct sockaddr_in6 *)&iflr->addr; 1531 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { 1532 s6->sin6_addr.s6_addr16[1] = 0; 1533 s6->sin6_scope_id = 1534 in6_addr2scopeid(ifp, &s6->sin6_addr); 1535 } 1536 if (ifp->if_flags & IFF_POINTOPOINT) { 1537 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1538 ia->ia_dstaddr.sin6_len); 1539 s6 = (struct sockaddr_in6 *)&iflr->dstaddr; 1540 if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { 1541 s6->sin6_addr.s6_addr16[1] = 0; 1542 s6->sin6_scope_id = 1543 in6_addr2scopeid(ifp, 1544 &s6->sin6_addr); 1545 } 1546 } else 1547 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1548 1549 iflr->prefixlen = 1550 in6_mask2len(&ia->ia_prefixmask.sin6_addr, 1551 NULL); 1552 1553 iflr->flags = ia->ia6_flags; /* XXX */ 1554 1555 return 0; 1556 } else { 1557 struct in6_aliasreq ifra; 1558 1559 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1560 bzero(&ifra, sizeof(ifra)); 1561 bcopy(iflr->iflr_name, ifra.ifra_name, 1562 sizeof(ifra.ifra_name)); 1563 1564 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1565 ia->ia_addr.sin6_len); 1566 if (ifp->if_flags & IFF_POINTOPOINT) 1567 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1568 ia->ia_dstaddr.sin6_len); 1569 else 1570 bzero(&ifra.ifra_dstaddr, 1571 sizeof(ifra.ifra_dstaddr)); 1572 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1573 ia->ia_prefixmask.sin6_len); 1574 1575 ifra.ifra_flags = ia->ia6_flags; 1576 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1577 ifp, td); 1578 } 1579 } 1580 } 1581 1582 return EOPNOTSUPP; /* just for safety */ 1583 } 1584 1585 /* 1586 * Initialize an interface's intetnet6 address 1587 * and routing table entry. 1588 */ 1589 static int 1590 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, struct sockaddr_in6 *sin6, 1591 int newhost) 1592 { 1593 int error = 0, plen, ifacount = 0; 1594 struct ifaddr_container *ifac; 1595 1596 /* 1597 * Give the interface a chance to initialize 1598 * if this is its first address, 1599 * and to validate the address if necessary. 1600 */ 1601 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1602 if (ifac->ifa->ifa_addr == NULL) 1603 continue; /* just for safety */ 1604 if (ifac->ifa->ifa_addr->sa_family != AF_INET6) 1605 continue; 1606 ifacount++; 1607 } 1608 1609 ifnet_serialize_all(ifp); 1610 1611 ia->ia_addr = *sin6; 1612 1613 if (ifacount <= 1 && ifp->if_ioctl && 1614 (error = ifp->if_ioctl(ifp, SIOCSIFADDR, (caddr_t)ia, NULL))) { 1615 ifnet_deserialize_all(ifp); 1616 return (error); 1617 } 1618 1619 ifnet_deserialize_all(ifp); 1620 1621 ia->ia_ifa.ifa_metric = ifp->if_metric; 1622 1623 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1624 1625 /* 1626 * Special case: 1627 * If the destination address is specified for a point-to-point 1628 * interface, install a route to the destination as an interface 1629 * direct route. 1630 */ 1631 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1632 if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) { 1633 if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, 1634 RTF_UP | RTF_HOST)) != 0) 1635 return (error); 1636 ia->ia_flags |= IFA_ROUTE; 1637 } 1638 if (plen < 128) { 1639 /* 1640 * The RTF_CLONING flag is necessary for in6_is_ifloop_auto(). 1641 */ 1642 ia->ia_ifa.ifa_flags |= RTF_CLONING; 1643 } 1644 1645 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1646 if (newhost) { 1647 /* set the rtrequest function to create llinfo */ 1648 ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; 1649 in6_ifaddloop(&(ia->ia_ifa)); 1650 } 1651 1652 return (error); 1653 } 1654 1655 struct in6_multi_mship * 1656 in6_joingroup(struct ifnet *ifp, struct in6_addr *addr, int *errorp) 1657 { 1658 struct in6_multi_mship *imm; 1659 1660 imm = kmalloc(sizeof(*imm), M_IPMADDR, M_NOWAIT); 1661 if (!imm) { 1662 *errorp = ENOBUFS; 1663 return NULL; 1664 } 1665 imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp); 1666 if (!imm->i6mm_maddr) { 1667 /* *errorp is alrady set */ 1668 kfree(imm, M_IPMADDR); 1669 return NULL; 1670 } 1671 return imm; 1672 } 1673 1674 int 1675 in6_leavegroup(struct in6_multi_mship *imm) 1676 { 1677 1678 if (imm->i6mm_maddr) 1679 in6_delmulti(imm->i6mm_maddr); 1680 kfree(imm, M_IPMADDR); 1681 return 0; 1682 } 1683 1684 /* 1685 * Add an address to the list of IP6 multicast addresses for a 1686 * given interface. 1687 */ 1688 struct in6_multi * 1689 in6_addmulti(struct in6_addr *maddr6, struct ifnet *ifp, int *errorp) 1690 { 1691 struct in6_multi *in6m; 1692 struct sockaddr_in6 sin6; 1693 struct ifmultiaddr *ifma; 1694 1695 *errorp = 0; 1696 1697 crit_enter(); 1698 1699 /* 1700 * Call generic routine to add membership or increment 1701 * refcount. It wants addresses in the form of a sockaddr, 1702 * so we build one here (being careful to zero the unused bytes). 1703 */ 1704 bzero(&sin6, sizeof sin6); 1705 sin6.sin6_family = AF_INET6; 1706 sin6.sin6_len = sizeof sin6; 1707 sin6.sin6_addr = *maddr6; 1708 *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma); 1709 if (*errorp) { 1710 crit_exit(); 1711 return 0; 1712 } 1713 1714 /* 1715 * If ifma->ifma_protospec is null, then if_addmulti() created 1716 * a new record. Otherwise, we are done. 1717 */ 1718 if (ifma->ifma_protospec != NULL) { 1719 crit_exit(); 1720 return ifma->ifma_protospec; 1721 } 1722 1723 /* XXX - if_addmulti uses M_WAITOK. Can this really be called 1724 at interrupt time? If so, need to fix if_addmulti. XXX */ 1725 in6m = (struct in6_multi *)kmalloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT); 1726 if (in6m == NULL) { 1727 crit_exit(); 1728 return (NULL); 1729 } 1730 1731 bzero(in6m, sizeof *in6m); 1732 in6m->in6m_addr = *maddr6; 1733 in6m->in6m_ifp = ifp; 1734 in6m->in6m_ifma = ifma; 1735 ifma->ifma_protospec = in6m; 1736 LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry); 1737 1738 /* 1739 * Let MLD6 know that we have joined a new IP6 multicast 1740 * group. 1741 */ 1742 mld6_start_listening(in6m); 1743 crit_exit(); 1744 return (in6m); 1745 } 1746 1747 /* 1748 * Delete a multicast address record. 1749 */ 1750 void 1751 in6_delmulti(struct in6_multi *in6m) 1752 { 1753 struct ifmultiaddr *ifma = in6m->in6m_ifma; 1754 1755 crit_enter(); 1756 1757 if (ifma->ifma_refcount == 1) { 1758 /* 1759 * No remaining claims to this record; let MLD6 know 1760 * that we are leaving the multicast group. 1761 */ 1762 mld6_stop_listening(in6m); 1763 ifma->ifma_protospec = NULL; 1764 LIST_REMOVE(in6m, in6m_entry); 1765 kfree(in6m, M_IPMADDR); 1766 } 1767 /* XXX - should be separate API for when we have an ifma? */ 1768 if_delmulti(ifma->ifma_ifp, ifma->ifma_addr); 1769 crit_exit(); 1770 } 1771 1772 /* 1773 * Find an IPv6 interface link-local address specific to an interface. 1774 */ 1775 struct in6_ifaddr * 1776 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1777 { 1778 struct ifaddr_container *ifac; 1779 1780 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1781 struct ifaddr *ifa = ifac->ifa; 1782 1783 if (ifa->ifa_addr == NULL) 1784 continue; /* just for safety */ 1785 if (ifa->ifa_addr->sa_family != AF_INET6) 1786 continue; 1787 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1788 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1789 ignoreflags) != 0) 1790 continue; 1791 break; 1792 } 1793 } 1794 if (ifac != NULL) 1795 return ((struct in6_ifaddr *)(ifac->ifa)); 1796 else 1797 return (NULL); 1798 } 1799 1800 1801 /* 1802 * find the internet address corresponding to a given interface and address. 1803 */ 1804 struct in6_ifaddr * 1805 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1806 { 1807 struct ifaddr_container *ifac; 1808 1809 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1810 struct ifaddr *ifa = ifac->ifa; 1811 1812 if (ifa->ifa_addr == NULL) 1813 continue; /* just for safety */ 1814 if (ifa->ifa_addr->sa_family != AF_INET6) 1815 continue; 1816 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) 1817 break; 1818 } 1819 if (ifac != NULL) 1820 return ((struct in6_ifaddr *)(ifac->ifa)); 1821 else 1822 return (NULL); 1823 } 1824 1825 /* 1826 * find the internet address on a given interface corresponding to a neighbor's 1827 * address. 1828 */ 1829 struct in6_ifaddr * 1830 in6ifa_ifplocaladdr(const struct ifnet *ifp, const struct in6_addr *addr) 1831 { 1832 struct ifaddr *ifa; 1833 struct in6_ifaddr *ia; 1834 struct ifaddr_container *ifac; 1835 1836 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 1837 ifa = ifac->ifa; 1838 1839 if (ifa->ifa_addr == NULL) 1840 continue; /* just for safety */ 1841 if (ifa->ifa_addr->sa_family != AF_INET6) 1842 continue; 1843 ia = (struct in6_ifaddr *)ifa; 1844 if (IN6_ARE_MASKED_ADDR_EQUAL(addr, 1845 &ia->ia_addr.sin6_addr, 1846 &ia->ia_prefixmask.sin6_addr)) 1847 return ia; 1848 } 1849 1850 return NULL; 1851 } 1852 1853 /* 1854 * Convert IP6 address to printable (loggable) representation. 1855 */ 1856 static char digits[] = "0123456789abcdef"; 1857 static int ip6round = 0; 1858 char * 1859 ip6_sprintf(const struct in6_addr *addr) 1860 { 1861 static char ip6buf[8][48]; 1862 int i; 1863 char *cp; 1864 const u_short *a = (const u_short *)addr; 1865 const u_char *d; 1866 int dcolon = 0; 1867 1868 ip6round = (ip6round + 1) & 7; 1869 cp = ip6buf[ip6round]; 1870 1871 for (i = 0; i < 8; i++) { 1872 if (dcolon == 1) { 1873 if (*a == 0) { 1874 if (i == 7) 1875 *cp++ = ':'; 1876 a++; 1877 continue; 1878 } else 1879 dcolon = 2; 1880 } 1881 if (*a == 0) { 1882 if (dcolon == 0 && *(a + 1) == 0) { 1883 if (i == 0) 1884 *cp++ = ':'; 1885 *cp++ = ':'; 1886 dcolon = 1; 1887 } else { 1888 *cp++ = '0'; 1889 *cp++ = ':'; 1890 } 1891 a++; 1892 continue; 1893 } 1894 d = (const u_char *)a; 1895 *cp++ = digits[*d >> 4]; 1896 *cp++ = digits[*d++ & 0xf]; 1897 *cp++ = digits[*d >> 4]; 1898 *cp++ = digits[*d & 0xf]; 1899 *cp++ = ':'; 1900 a++; 1901 } 1902 *--cp = 0; 1903 return (ip6buf[ip6round]); 1904 } 1905 1906 int 1907 in6_localaddr(struct in6_addr *in6) 1908 { 1909 struct in6_ifaddr *ia; 1910 1911 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1912 return 1; 1913 1914 for (ia = in6_ifaddr; ia; ia = ia->ia_next) 1915 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1916 &ia->ia_prefixmask.sin6_addr)) 1917 return 1; 1918 1919 return (0); 1920 } 1921 1922 int 1923 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1924 { 1925 struct in6_ifaddr *ia; 1926 1927 for (ia = in6_ifaddr; ia; ia = ia->ia_next) { 1928 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 1929 &sa6->sin6_addr) && 1930 (ia->ia6_flags & IN6_IFF_DEPRECATED)) 1931 return (1); /* true */ 1932 1933 /* XXX: do we still have to go thru the rest of the list? */ 1934 } 1935 1936 return (0); /* false */ 1937 } 1938 1939 /* 1940 * return length of part which dst and src are equal 1941 * hard coding... 1942 */ 1943 int 1944 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1945 { 1946 int match = 0; 1947 u_char *s = (u_char *)src, *d = (u_char *)dst; 1948 u_char *lim = s + 16, r; 1949 1950 while (s < lim) 1951 if ((r = (*d++ ^ *s++)) != 0) { 1952 while (r < 128) { 1953 match++; 1954 r <<= 1; 1955 } 1956 break; 1957 } else 1958 match += 8; 1959 return match; 1960 } 1961 1962 /* XXX: to be scope conscious */ 1963 int 1964 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1965 { 1966 int bytelen, bitlen; 1967 1968 /* sanity check */ 1969 if (0 > len || len > 128) { 1970 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1971 len); 1972 return (0); 1973 } 1974 1975 bytelen = len / 8; 1976 bitlen = len % 8; 1977 1978 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1979 return (0); 1980 if (p1->s6_addr[bytelen] >> (8 - bitlen) != 1981 p2->s6_addr[bytelen] >> (8 - bitlen)) 1982 return (0); 1983 1984 return (1); 1985 } 1986 1987 void 1988 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1989 { 1990 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1991 int bytelen, bitlen, i; 1992 1993 /* sanity check */ 1994 if (0 > len || len > 128) { 1995 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1996 len); 1997 return; 1998 } 1999 2000 bzero(maskp, sizeof(*maskp)); 2001 bytelen = len / 8; 2002 bitlen = len % 8; 2003 for (i = 0; i < bytelen; i++) 2004 maskp->s6_addr[i] = 0xff; 2005 if (bitlen) 2006 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2007 } 2008 2009 /* 2010 * return the best address out of the same scope 2011 */ 2012 struct in6_ifaddr * 2013 in6_ifawithscope(struct ifnet *oifp, struct in6_addr *dst) 2014 { 2015 int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0; 2016 int blen = -1; 2017 struct ifnet *ifp; 2018 struct in6_ifaddr *ifa_best = NULL; 2019 2020 if (oifp == NULL) { 2021 #if 0 2022 kprintf("in6_ifawithscope: output interface is not specified\n"); 2023 #endif 2024 return (NULL); 2025 } 2026 2027 /* 2028 * We search for all addresses on all interfaces from the beginning. 2029 * Comparing an interface with the outgoing interface will be done 2030 * only at the final stage of tiebreaking. 2031 */ 2032 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 2033 { 2034 struct ifaddr_container *ifac; 2035 2036 /* 2037 * We can never take an address that breaks the scope zone 2038 * of the destination. 2039 */ 2040 if (ifp->if_afdata[AF_INET6] == NULL) 2041 continue; 2042 if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst)) 2043 continue; 2044 2045 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2046 int tlen = -1, dscopecmp, bscopecmp, matchcmp; 2047 struct ifaddr *ifa = ifac->ifa; 2048 2049 if (ifa->ifa_addr->sa_family != AF_INET6) 2050 continue; 2051 2052 src_scope = in6_addrscope(IFA_IN6(ifa)); 2053 2054 /* 2055 * Don't use an address before completing DAD 2056 * nor a duplicated address. 2057 */ 2058 if (((struct in6_ifaddr *)ifa)->ia6_flags & 2059 IN6_IFF_NOTREADY) 2060 continue; 2061 2062 /* XXX: is there any case to allow anycasts? */ 2063 if (((struct in6_ifaddr *)ifa)->ia6_flags & 2064 IN6_IFF_ANYCAST) 2065 continue; 2066 2067 if (((struct in6_ifaddr *)ifa)->ia6_flags & 2068 IN6_IFF_DETACHED) 2069 continue; 2070 2071 /* 2072 * If this is the first address we find, 2073 * keep it anyway. 2074 */ 2075 if (ifa_best == NULL) 2076 goto replace; 2077 2078 /* 2079 * ifa_best is never NULL beyond this line except 2080 * within the block labeled "replace". 2081 */ 2082 2083 /* 2084 * If ifa_best has a smaller scope than dst and 2085 * the current address has a larger one than 2086 * (or equal to) dst, always replace ifa_best. 2087 * Also, if the current address has a smaller scope 2088 * than dst, ignore it unless ifa_best also has a 2089 * smaller scope. 2090 * Consequently, after the two if-clause below, 2091 * the followings must be satisfied: 2092 * (scope(src) < scope(dst) && 2093 * scope(best) < scope(dst)) 2094 * OR 2095 * (scope(best) >= scope(dst) && 2096 * scope(src) >= scope(dst)) 2097 */ 2098 if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 && 2099 IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0) 2100 goto replace; /* (A) */ 2101 if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 && 2102 IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0) 2103 continue; /* (B) */ 2104 2105 /* 2106 * A deprecated address SHOULD NOT be used in new 2107 * communications if an alternate (non-deprecated) 2108 * address is available and has sufficient scope. 2109 * RFC 2462, Section 5.5.4. 2110 */ 2111 if (((struct in6_ifaddr *)ifa)->ia6_flags & 2112 IN6_IFF_DEPRECATED) { 2113 /* 2114 * Ignore any deprecated addresses if 2115 * specified by configuration. 2116 */ 2117 if (!ip6_use_deprecated) 2118 continue; 2119 2120 /* 2121 * If we have already found a non-deprecated 2122 * candidate, just ignore deprecated addresses. 2123 */ 2124 if (!(ifa_best->ia6_flags & IN6_IFF_DEPRECATED)) 2125 continue; 2126 } 2127 2128 /* 2129 * A non-deprecated address is always preferred 2130 * to a deprecated one regardless of scopes and 2131 * address matching (Note invariants ensured by the 2132 * conditions (A) and (B) above.) 2133 */ 2134 if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) && 2135 !(((struct in6_ifaddr *)ifa)->ia6_flags & 2136 IN6_IFF_DEPRECATED)) 2137 goto replace; 2138 2139 /* 2140 * When we use temporary addresses described in 2141 * RFC 3041, we prefer temporary addresses to 2142 * public autoconf addresses. Again, note the 2143 * invariants from (A) and (B). Also note that we 2144 * don't have any preference between static addresses 2145 * and autoconf addresses (despite of whether or not 2146 * the latter is temporary or public.) 2147 */ 2148 if (ip6_use_tempaddr) { 2149 struct in6_ifaddr *ifat; 2150 2151 ifat = (struct in6_ifaddr *)ifa; 2152 if ((ifa_best->ia6_flags & 2153 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2154 == IN6_IFF_AUTOCONF && 2155 (ifat->ia6_flags & 2156 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2157 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) { 2158 goto replace; 2159 } 2160 if ((ifa_best->ia6_flags & 2161 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2162 == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) && 2163 (ifat->ia6_flags & 2164 (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) 2165 == IN6_IFF_AUTOCONF) { 2166 continue; 2167 } 2168 } 2169 2170 /* 2171 * At this point, we have two cases: 2172 * 1. we are looking at a non-deprecated address, 2173 * and ifa_best is also non-deprecated. 2174 * 2. we are looking at a deprecated address, 2175 * and ifa_best is also deprecated. 2176 * Also, we do not have to consider a case where 2177 * the scope of if_best is larger(smaller) than dst and 2178 * the scope of the current address is smaller(larger) 2179 * than dst. Such a case has already been covered. 2180 * Tiebreaking is done according to the following 2181 * items: 2182 * - the scope comparison between the address and 2183 * dst (dscopecmp) 2184 * - the scope comparison between the address and 2185 * ifa_best (bscopecmp) 2186 * - if the address match dst longer than ifa_best 2187 * (matchcmp) 2188 * - if the address is on the outgoing I/F (outI/F) 2189 * 2190 * Roughly speaking, the selection policy is 2191 * - the most important item is scope. The same scope 2192 * is best. Then search for a larger scope. 2193 * Smaller scopes are the last resort. 2194 * - A deprecated address is chosen only when we have 2195 * no address that has an enough scope, but is 2196 * prefered to any addresses of smaller scopes 2197 * (this must be already done above.) 2198 * - addresses on the outgoing I/F are preferred to 2199 * ones on other interfaces if none of above 2200 * tiebreaks. In the table below, the column "bI" 2201 * means if the best_ifa is on the outgoing 2202 * interface, and the column "sI" means if the ifa 2203 * is on the outgoing interface. 2204 * - If there is no other reasons to choose one, 2205 * longest address match against dst is considered. 2206 * 2207 * The precise decision table is as follows: 2208 * dscopecmp bscopecmp match bI oI | replace? 2209 * N/A equal N/A Y N | No (1) 2210 * N/A equal N/A N Y | Yes (2) 2211 * N/A equal larger N/A | Yes (3) 2212 * N/A equal !larger N/A | No (4) 2213 * larger larger N/A N/A | No (5) 2214 * larger smaller N/A N/A | Yes (6) 2215 * smaller larger N/A N/A | Yes (7) 2216 * smaller smaller N/A N/A | No (8) 2217 * equal smaller N/A N/A | Yes (9) 2218 * equal larger (already done at A above) 2219 */ 2220 dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope); 2221 bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope); 2222 2223 if (bscopecmp == 0) { 2224 struct ifnet *bifp = ifa_best->ia_ifp; 2225 2226 if (bifp == oifp && ifp != oifp) /* (1) */ 2227 continue; 2228 if (bifp != oifp && ifp == oifp) /* (2) */ 2229 goto replace; 2230 2231 /* 2232 * Both bifp and ifp are on the outgoing 2233 * interface, or both two are on a different 2234 * interface from the outgoing I/F. 2235 * now we need address matching against dst 2236 * for tiebreaking. 2237 */ 2238 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2239 matchcmp = tlen - blen; 2240 if (matchcmp > 0) /* (3) */ 2241 goto replace; 2242 continue; /* (4) */ 2243 } 2244 if (dscopecmp > 0) { 2245 if (bscopecmp > 0) /* (5) */ 2246 continue; 2247 goto replace; /* (6) */ 2248 } 2249 if (dscopecmp < 0) { 2250 if (bscopecmp > 0) /* (7) */ 2251 goto replace; 2252 continue; /* (8) */ 2253 } 2254 2255 /* now dscopecmp must be 0 */ 2256 if (bscopecmp < 0) 2257 goto replace; /* (9) */ 2258 2259 replace: 2260 ifa_best = (struct in6_ifaddr *)ifa; 2261 blen = tlen >= 0 ? tlen : 2262 in6_matchlen(IFA_IN6(ifa), dst); 2263 best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr); 2264 } 2265 } 2266 2267 /* count statistics for future improvements */ 2268 if (ifa_best == NULL) 2269 ip6stat.ip6s_sources_none++; 2270 else { 2271 if (oifp == ifa_best->ia_ifp) 2272 ip6stat.ip6s_sources_sameif[best_scope]++; 2273 else 2274 ip6stat.ip6s_sources_otherif[best_scope]++; 2275 2276 if (best_scope == dst_scope) 2277 ip6stat.ip6s_sources_samescope[best_scope]++; 2278 else 2279 ip6stat.ip6s_sources_otherscope[best_scope]++; 2280 2281 if (ifa_best->ia6_flags & IN6_IFF_DEPRECATED) 2282 ip6stat.ip6s_sources_deprecated[best_scope]++; 2283 } 2284 2285 return (ifa_best); 2286 } 2287 2288 /* 2289 * return the best address out of the same scope. if no address was 2290 * found, return the first valid address from designated IF. 2291 */ 2292 struct in6_ifaddr * 2293 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2294 { 2295 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2296 struct ifaddr_container *ifac; 2297 struct in6_ifaddr *besta = NULL; 2298 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2299 2300 dep[0] = dep[1] = NULL; 2301 2302 /* 2303 * We first look for addresses in the same scope. 2304 * If there is one, return it. 2305 * If two or more, return one which matches the dst longest. 2306 * If none, return one of global addresses assigned other ifs. 2307 */ 2308 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2309 struct ifaddr *ifa = ifac->ifa; 2310 2311 if (ifa->ifa_addr->sa_family != AF_INET6) 2312 continue; 2313 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2314 continue; /* XXX: is there any case to allow anycast? */ 2315 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2316 continue; /* don't use this interface */ 2317 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2318 continue; 2319 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2320 if (ip6_use_deprecated) 2321 dep[0] = (struct in6_ifaddr *)ifa; 2322 continue; 2323 } 2324 2325 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2326 /* 2327 * call in6_matchlen() as few as possible 2328 */ 2329 if (besta) { 2330 if (blen == -1) 2331 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2332 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2333 if (tlen > blen) { 2334 blen = tlen; 2335 besta = (struct in6_ifaddr *)ifa; 2336 } 2337 } else 2338 besta = (struct in6_ifaddr *)ifa; 2339 } 2340 } 2341 if (besta) 2342 return (besta); 2343 2344 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2345 struct ifaddr *ifa = ifac->ifa; 2346 2347 if (ifa->ifa_addr->sa_family != AF_INET6) 2348 continue; 2349 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2350 continue; /* XXX: is there any case to allow anycast? */ 2351 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2352 continue; /* don't use this interface */ 2353 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2354 continue; 2355 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2356 if (ip6_use_deprecated) 2357 dep[1] = (struct in6_ifaddr *)ifa; 2358 continue; 2359 } 2360 2361 return (struct in6_ifaddr *)ifa; 2362 } 2363 2364 /* use the last-resort values, that are, deprecated addresses */ 2365 if (dep[0]) 2366 return dep[0]; 2367 if (dep[1]) 2368 return dep[1]; 2369 2370 return NULL; 2371 } 2372 2373 /* 2374 * perform DAD when interface becomes IFF_UP. 2375 */ 2376 void 2377 in6_if_up(struct ifnet *ifp) 2378 { 2379 struct ifaddr_container *ifac; 2380 struct in6_ifaddr *ia; 2381 int dad_delay; /* delay ticks before DAD output */ 2382 2383 /* 2384 * special cases, like 6to4, are handled in in6_ifattach 2385 */ 2386 in6_ifattach(ifp, NULL); 2387 2388 dad_delay = 0; 2389 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 2390 struct ifaddr *ifa = ifac->ifa; 2391 2392 if (ifa->ifa_addr->sa_family != AF_INET6) 2393 continue; 2394 ia = (struct in6_ifaddr *)ifa; 2395 if (ia->ia6_flags & IN6_IFF_TENTATIVE) 2396 nd6_dad_start(ifa, &dad_delay); 2397 } 2398 } 2399 2400 int 2401 in6if_do_dad(struct ifnet *ifp) 2402 { 2403 if (ifp->if_flags & IFF_LOOPBACK) 2404 return (0); 2405 2406 switch (ifp->if_type) { 2407 #ifdef IFT_DUMMY 2408 case IFT_DUMMY: 2409 #endif 2410 case IFT_FAITH: 2411 /* 2412 * These interfaces do not have the IFF_LOOPBACK flag, 2413 * but loop packets back. We do not have to do DAD on such 2414 * interfaces. We should even omit it, because loop-backed 2415 * NS would confuse the DAD procedure. 2416 */ 2417 return (0); 2418 default: 2419 /* 2420 * Our DAD routine requires the interface up and running. 2421 * However, some interfaces can be up before the RUNNING 2422 * status. Additionaly, users may try to assign addresses 2423 * before the interface becomes up (or running). 2424 * We simply skip DAD in such a case as a work around. 2425 * XXX: we should rather mark "tentative" on such addresses, 2426 * and do DAD after the interface becomes ready. 2427 */ 2428 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 2429 (IFF_UP|IFF_RUNNING)) 2430 return (0); 2431 2432 return (1); 2433 } 2434 } 2435 2436 /* 2437 * Calculate max IPv6 MTU through all the interfaces and store it 2438 * to in6_maxmtu. 2439 */ 2440 void 2441 in6_setmaxmtu(void) 2442 { 2443 unsigned long maxmtu = 0; 2444 struct ifnet *ifp; 2445 2446 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) 2447 { 2448 /* this function can be called during ifnet initialization */ 2449 if (ifp->if_afdata[AF_INET6] == NULL) 2450 continue; 2451 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2452 ND_IFINFO(ifp)->linkmtu > maxmtu) 2453 maxmtu = ND_IFINFO(ifp)->linkmtu; 2454 } 2455 if (maxmtu) /* update only when maxmtu is positive */ 2456 in6_maxmtu = maxmtu; 2457 } 2458 2459 void * 2460 in6_domifattach(struct ifnet *ifp) 2461 { 2462 struct in6_ifextra *ext; 2463 2464 ext = (struct in6_ifextra *)kmalloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2465 bzero(ext, sizeof(*ext)); 2466 2467 ext->in6_ifstat = (struct in6_ifstat *)kmalloc(sizeof(struct in6_ifstat), 2468 M_IFADDR, M_WAITOK); 2469 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2470 2471 ext->icmp6_ifstat = 2472 (struct icmp6_ifstat *)kmalloc(sizeof(struct icmp6_ifstat), 2473 M_IFADDR, M_WAITOK); 2474 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2475 2476 ext->nd_ifinfo = nd6_ifattach(ifp); 2477 ext->scope6_id = scope6_ifattach(ifp); 2478 return ext; 2479 } 2480 2481 void 2482 in6_domifdetach(struct ifnet *ifp, void *aux) 2483 { 2484 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2485 scope6_ifdetach(ext->scope6_id); 2486 nd6_ifdetach(ext->nd_ifinfo); 2487 kfree(ext->in6_ifstat, M_IFADDR); 2488 kfree(ext->icmp6_ifstat, M_IFADDR); 2489 kfree(ext, M_IFADDR); 2490 } 2491 2492 /* 2493 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2494 * v4 mapped addr or v4 compat addr 2495 */ 2496 void 2497 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2498 { 2499 bzero(sin, sizeof(*sin)); 2500 sin->sin_len = sizeof(struct sockaddr_in); 2501 sin->sin_family = AF_INET; 2502 sin->sin_port = sin6->sin6_port; 2503 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2504 } 2505 2506 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2507 void 2508 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2509 { 2510 bzero(sin6, sizeof(*sin6)); 2511 sin6->sin6_len = sizeof(struct sockaddr_in6); 2512 sin6->sin6_family = AF_INET6; 2513 sin6->sin6_port = sin->sin_port; 2514 sin6->sin6_addr.s6_addr32[0] = 0; 2515 sin6->sin6_addr.s6_addr32[1] = 0; 2516 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2517 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2518 } 2519 2520 /* Convert sockaddr_in6 into sockaddr_in. */ 2521 void 2522 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2523 { 2524 struct sockaddr_in *sin_p; 2525 struct sockaddr_in6 sin6; 2526 2527 /* 2528 * Save original sockaddr_in6 addr and convert it 2529 * to sockaddr_in. 2530 */ 2531 sin6 = *(struct sockaddr_in6 *)nam; 2532 sin_p = (struct sockaddr_in *)nam; 2533 in6_sin6_2_sin(sin_p, &sin6); 2534 } 2535 2536 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2537 void 2538 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2539 { 2540 struct sockaddr_in *sin_p; 2541 struct sockaddr_in6 *sin6_p; 2542 2543 sin6_p = kmalloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2544 sin_p = (struct sockaddr_in *)*nam; 2545 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2546 kfree(*nam, M_SONAME); 2547 *nam = (struct sockaddr *)sin6_p; 2548 } 2549