1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in.c 8.2 (Berkeley) 11/15/93 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include "opt_compat.h" 67 #include "opt_inet.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/eventhandler.h> 72 #include <sys/errno.h> 73 #include <sys/jail.h> 74 #include <sys/malloc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/sockio.h> 78 #include <sys/systm.h> 79 #include <sys/priv.h> 80 #include <sys/proc.h> 81 #include <sys/time.h> 82 #include <sys/kernel.h> 83 #include <sys/lock.h> 84 #include <sys/rmlock.h> 85 #include <sys/syslog.h> 86 87 #include <net/if.h> 88 #include <net/if_var.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 #include <net/if_dl.h> 92 #include <net/vnet.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_var.h> 96 #include <net/if_llatbl.h> 97 #include <netinet/if_ether.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/ip.h> 100 #include <netinet/in_pcb.h> 101 #include <netinet/ip_carp.h> 102 103 #include <netinet/ip6.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet6/nd6.h> 106 #include <netinet6/mld6_var.h> 107 #include <netinet6/ip6_mroute.h> 108 #include <netinet6/in6_ifattach.h> 109 #include <netinet6/scope6_var.h> 110 #include <netinet6/in6_fib.h> 111 #include <netinet6/in6_pcb.h> 112 113 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 114 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 115 116 /* 117 * Definitions of some costant IP6 addresses. 118 */ 119 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 120 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 121 const struct in6_addr in6addr_nodelocal_allnodes = 122 IN6ADDR_NODELOCAL_ALLNODES_INIT; 123 const struct in6_addr in6addr_linklocal_allnodes = 124 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 125 const struct in6_addr in6addr_linklocal_allrouters = 126 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 127 const struct in6_addr in6addr_linklocal_allv2routers = 128 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 129 130 const struct in6_addr in6mask0 = IN6MASK0; 131 const struct in6_addr in6mask32 = IN6MASK32; 132 const struct in6_addr in6mask64 = IN6MASK64; 133 const struct in6_addr in6mask96 = IN6MASK96; 134 const struct in6_addr in6mask128 = IN6MASK128; 135 136 const struct sockaddr_in6 sa6_any = 137 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 138 139 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 140 struct in6_aliasreq *, int); 141 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 142 143 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 144 struct in6_ifaddr *, int); 145 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 146 struct in6_aliasreq *, int flags); 147 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 148 struct in6_ifaddr *, int, int); 149 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 150 struct in6_ifaddr *, int); 151 152 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 153 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 154 155 156 void 157 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 158 { 159 struct sockaddr_dl gateway; 160 struct sockaddr_in6 mask, addr; 161 struct rtentry rt; 162 163 /* 164 * initialize for rtmsg generation 165 */ 166 bzero(&gateway, sizeof(gateway)); 167 gateway.sdl_len = sizeof(gateway); 168 gateway.sdl_family = AF_LINK; 169 170 bzero(&rt, sizeof(rt)); 171 rt.rt_gateway = (struct sockaddr *)&gateway; 172 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 173 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 174 rt_mask(&rt) = (struct sockaddr *)&mask; 175 rt_key(&rt) = (struct sockaddr *)&addr; 176 rt.rt_flags = RTF_HOST | RTF_STATIC; 177 if (cmd == RTM_ADD) 178 rt.rt_flags |= RTF_UP; 179 /* Announce arrival of local address to all FIBs. */ 180 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt); 181 } 182 183 int 184 in6_mask2len(struct in6_addr *mask, u_char *lim0) 185 { 186 int x = 0, y; 187 u_char *lim = lim0, *p; 188 189 /* ignore the scope_id part */ 190 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 191 lim = (u_char *)mask + sizeof(*mask); 192 for (p = (u_char *)mask; p < lim; x++, p++) { 193 if (*p != 0xff) 194 break; 195 } 196 y = 0; 197 if (p < lim) { 198 for (y = 0; y < 8; y++) { 199 if ((*p & (0x80 >> y)) == 0) 200 break; 201 } 202 } 203 204 /* 205 * when the limit pointer is given, do a stricter check on the 206 * remaining bits. 207 */ 208 if (p < lim) { 209 if (y != 0 && (*p & (0x00ff >> y)) != 0) 210 return (-1); 211 for (p = p + 1; p < lim; p++) 212 if (*p != 0) 213 return (-1); 214 } 215 216 return x * 8 + y; 217 } 218 219 #ifdef COMPAT_FREEBSD32 220 struct in6_ndifreq32 { 221 char ifname[IFNAMSIZ]; 222 uint32_t ifindex; 223 }; 224 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 225 #endif 226 227 int 228 in6_control(struct socket *so, u_long cmd, caddr_t data, 229 struct ifnet *ifp, struct thread *td) 230 { 231 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 232 struct in6_ifaddr *ia = NULL; 233 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 234 struct sockaddr_in6 *sa6; 235 int carp_attached = 0; 236 int error; 237 u_long ocmd = cmd; 238 239 /* 240 * Compat to make pre-10.x ifconfig(8) operable. 241 */ 242 if (cmd == OSIOCAIFADDR_IN6) 243 cmd = SIOCAIFADDR_IN6; 244 245 switch (cmd) { 246 case SIOCGETSGCNT_IN6: 247 case SIOCGETMIFCNT_IN6: 248 /* 249 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 250 * We cannot see how that would be needed, so do not adjust the 251 * KPI blindly; more likely should clean up the IPv4 variant. 252 */ 253 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 254 } 255 256 switch (cmd) { 257 case SIOCAADDRCTL_POLICY: 258 case SIOCDADDRCTL_POLICY: 259 if (td != NULL) { 260 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 261 if (error) 262 return (error); 263 } 264 return (in6_src_ioctl(cmd, data)); 265 } 266 267 if (ifp == NULL) 268 return (EOPNOTSUPP); 269 270 switch (cmd) { 271 case SIOCSNDFLUSH_IN6: 272 case SIOCSPFXFLUSH_IN6: 273 case SIOCSRTRFLUSH_IN6: 274 case SIOCSDEFIFACE_IN6: 275 case SIOCSIFINFO_FLAGS: 276 case SIOCSIFINFO_IN6: 277 if (td != NULL) { 278 error = priv_check(td, PRIV_NETINET_ND6); 279 if (error) 280 return (error); 281 } 282 /* FALLTHROUGH */ 283 case OSIOCGIFINFO_IN6: 284 case SIOCGIFINFO_IN6: 285 case SIOCGNBRINFO_IN6: 286 case SIOCGDEFIFACE_IN6: 287 return (nd6_ioctl(cmd, data, ifp)); 288 289 #ifdef COMPAT_FREEBSD32 290 case SIOCGDEFIFACE32_IN6: 291 { 292 struct in6_ndifreq ndif; 293 struct in6_ndifreq32 *ndif32; 294 295 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 296 ifp); 297 if (error) 298 return (error); 299 ndif32 = (struct in6_ndifreq32 *)data; 300 ndif32->ifindex = ndif.ifindex; 301 return (0); 302 } 303 #endif 304 } 305 306 switch (cmd) { 307 case SIOCSIFPREFIX_IN6: 308 case SIOCDIFPREFIX_IN6: 309 case SIOCAIFPREFIX_IN6: 310 case SIOCCIFPREFIX_IN6: 311 case SIOCSGIFPREFIX_IN6: 312 case SIOCGIFPREFIX_IN6: 313 log(LOG_NOTICE, 314 "prefix ioctls are now invalidated. " 315 "please use ifconfig.\n"); 316 return (EOPNOTSUPP); 317 } 318 319 switch (cmd) { 320 case SIOCSSCOPE6: 321 if (td != NULL) { 322 error = priv_check(td, PRIV_NETINET_SCOPE6); 323 if (error) 324 return (error); 325 } 326 /* FALLTHROUGH */ 327 case SIOCGSCOPE6: 328 case SIOCGSCOPE6DEF: 329 return (scope6_ioctl(cmd, data, ifp)); 330 } 331 332 /* 333 * Find address for this interface, if it exists. 334 * 335 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 336 * only, and used the first interface address as the target of other 337 * operations (without checking ifra_addr). This was because netinet 338 * code/API assumed at most 1 interface address per interface. 339 * Since IPv6 allows a node to assign multiple addresses 340 * on a single interface, we almost always look and check the 341 * presence of ifra_addr, and reject invalid ones here. 342 * It also decreases duplicated code among SIOC*_IN6 operations. 343 */ 344 switch (cmd) { 345 case SIOCAIFADDR_IN6: 346 case SIOCSIFPHYADDR_IN6: 347 sa6 = &ifra->ifra_addr; 348 break; 349 case SIOCSIFADDR_IN6: 350 case SIOCGIFADDR_IN6: 351 case SIOCSIFDSTADDR_IN6: 352 case SIOCSIFNETMASK_IN6: 353 case SIOCGIFDSTADDR_IN6: 354 case SIOCGIFNETMASK_IN6: 355 case SIOCDIFADDR_IN6: 356 case SIOCGIFPSRCADDR_IN6: 357 case SIOCGIFPDSTADDR_IN6: 358 case SIOCGIFAFLAG_IN6: 359 case SIOCSNDFLUSH_IN6: 360 case SIOCSPFXFLUSH_IN6: 361 case SIOCSRTRFLUSH_IN6: 362 case SIOCGIFALIFETIME_IN6: 363 case SIOCGIFSTAT_IN6: 364 case SIOCGIFSTAT_ICMP6: 365 sa6 = &ifr->ifr_addr; 366 break; 367 case SIOCSIFADDR: 368 case SIOCSIFBRDADDR: 369 case SIOCSIFDSTADDR: 370 case SIOCSIFNETMASK: 371 /* 372 * Although we should pass any non-INET6 ioctl requests 373 * down to driver, we filter some legacy INET requests. 374 * Drivers trust SIOCSIFADDR et al to come from an already 375 * privileged layer, and do not perform any credentials 376 * checks or input validation. 377 */ 378 return (EINVAL); 379 default: 380 sa6 = NULL; 381 break; 382 } 383 if (sa6 && sa6->sin6_family == AF_INET6) { 384 if (sa6->sin6_scope_id != 0) 385 error = sa6_embedscope(sa6, 0); 386 else 387 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 388 if (error != 0) 389 return (error); 390 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 391 &sa6->sin6_addr)) != 0) 392 return (error); 393 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 394 } else 395 ia = NULL; 396 397 switch (cmd) { 398 case SIOCSIFADDR_IN6: 399 case SIOCSIFDSTADDR_IN6: 400 case SIOCSIFNETMASK_IN6: 401 /* 402 * Since IPv6 allows a node to assign multiple addresses 403 * on a single interface, SIOCSIFxxx ioctls are deprecated. 404 */ 405 /* we decided to obsolete this command (20000704) */ 406 error = EINVAL; 407 goto out; 408 409 case SIOCDIFADDR_IN6: 410 /* 411 * for IPv4, we look for existing in_ifaddr here to allow 412 * "ifconfig if0 delete" to remove the first IPv4 address on 413 * the interface. For IPv6, as the spec allows multiple 414 * interface address from the day one, we consider "remove the 415 * first one" semantics to be not preferable. 416 */ 417 if (ia == NULL) { 418 error = EADDRNOTAVAIL; 419 goto out; 420 } 421 /* FALLTHROUGH */ 422 case SIOCAIFADDR_IN6: 423 /* 424 * We always require users to specify a valid IPv6 address for 425 * the corresponding operation. 426 */ 427 if (ifra->ifra_addr.sin6_family != AF_INET6 || 428 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 429 error = EAFNOSUPPORT; 430 goto out; 431 } 432 433 if (td != NULL) { 434 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 435 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 436 if (error) 437 goto out; 438 } 439 /* FALLTHROUGH */ 440 case SIOCGIFSTAT_IN6: 441 case SIOCGIFSTAT_ICMP6: 442 if (ifp->if_afdata[AF_INET6] == NULL) { 443 error = EPFNOSUPPORT; 444 goto out; 445 } 446 break; 447 448 case SIOCGIFADDR_IN6: 449 /* This interface is basically deprecated. use SIOCGIFCONF. */ 450 /* FALLTHROUGH */ 451 case SIOCGIFAFLAG_IN6: 452 case SIOCGIFNETMASK_IN6: 453 case SIOCGIFDSTADDR_IN6: 454 case SIOCGIFALIFETIME_IN6: 455 /* must think again about its semantics */ 456 if (ia == NULL) { 457 error = EADDRNOTAVAIL; 458 goto out; 459 } 460 break; 461 } 462 463 switch (cmd) { 464 case SIOCGIFADDR_IN6: 465 ifr->ifr_addr = ia->ia_addr; 466 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 467 goto out; 468 break; 469 470 case SIOCGIFDSTADDR_IN6: 471 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 472 error = EINVAL; 473 goto out; 474 } 475 /* 476 * XXX: should we check if ifa_dstaddr is NULL and return 477 * an error? 478 */ 479 ifr->ifr_dstaddr = ia->ia_dstaddr; 480 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 481 goto out; 482 break; 483 484 case SIOCGIFNETMASK_IN6: 485 ifr->ifr_addr = ia->ia_prefixmask; 486 break; 487 488 case SIOCGIFAFLAG_IN6: 489 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 490 break; 491 492 case SIOCGIFSTAT_IN6: 493 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 494 ifp->if_afdata[AF_INET6])->in6_ifstat, 495 &ifr->ifr_ifru.ifru_stat, 496 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 497 break; 498 499 case SIOCGIFSTAT_ICMP6: 500 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 501 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 502 &ifr->ifr_ifru.ifru_icmp6stat, 503 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 504 break; 505 506 case SIOCGIFALIFETIME_IN6: 507 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 508 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 509 time_t maxexpire; 510 struct in6_addrlifetime *retlt = 511 &ifr->ifr_ifru.ifru_lifetime; 512 513 /* 514 * XXX: adjust expiration time assuming time_t is 515 * signed. 516 */ 517 maxexpire = (-1) & 518 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 519 if (ia->ia6_lifetime.ia6t_vltime < 520 maxexpire - ia->ia6_updatetime) { 521 retlt->ia6t_expire = ia->ia6_updatetime + 522 ia->ia6_lifetime.ia6t_vltime; 523 } else 524 retlt->ia6t_expire = maxexpire; 525 } 526 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 527 time_t maxexpire; 528 struct in6_addrlifetime *retlt = 529 &ifr->ifr_ifru.ifru_lifetime; 530 531 /* 532 * XXX: adjust expiration time assuming time_t is 533 * signed. 534 */ 535 maxexpire = (-1) & 536 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 537 if (ia->ia6_lifetime.ia6t_pltime < 538 maxexpire - ia->ia6_updatetime) { 539 retlt->ia6t_preferred = ia->ia6_updatetime + 540 ia->ia6_lifetime.ia6t_pltime; 541 } else 542 retlt->ia6t_preferred = maxexpire; 543 } 544 break; 545 546 case SIOCAIFADDR_IN6: 547 { 548 struct nd_prefixctl pr0; 549 struct nd_prefix *pr; 550 551 /* 552 * first, make or update the interface address structure, 553 * and link it to the list. 554 */ 555 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 556 goto out; 557 if (ia != NULL) { 558 if (ia->ia_ifa.ifa_carp) 559 (*carp_detach_p)(&ia->ia_ifa, true); 560 ifa_free(&ia->ia_ifa); 561 } 562 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 563 == NULL) { 564 /* 565 * this can happen when the user specify the 0 valid 566 * lifetime. 567 */ 568 break; 569 } 570 571 if (cmd == ocmd && ifra->ifra_vhid > 0) { 572 if (carp_attach_p != NULL) 573 error = (*carp_attach_p)(&ia->ia_ifa, 574 ifra->ifra_vhid); 575 else 576 error = EPROTONOSUPPORT; 577 if (error) 578 goto out; 579 else 580 carp_attached = 1; 581 } 582 583 /* 584 * then, make the prefix on-link on the interface. 585 * XXX: we'd rather create the prefix before the address, but 586 * we need at least one address to install the corresponding 587 * interface route, so we configure the address first. 588 */ 589 590 /* 591 * convert mask to prefix length (prefixmask has already 592 * been validated in in6_update_ifa(). 593 */ 594 bzero(&pr0, sizeof(pr0)); 595 pr0.ndpr_ifp = ifp; 596 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 597 NULL); 598 if (pr0.ndpr_plen == 128) { 599 /* we don't need to install a host route. */ 600 goto aifaddr_out; 601 } 602 pr0.ndpr_prefix = ifra->ifra_addr; 603 /* apply the mask for safety. */ 604 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 605 &ifra->ifra_prefixmask.sin6_addr); 606 607 /* 608 * XXX: since we don't have an API to set prefix (not address) 609 * lifetimes, we just use the same lifetimes as addresses. 610 * The (temporarily) installed lifetimes can be overridden by 611 * later advertised RAs (when accept_rtadv is non 0), which is 612 * an intended behavior. 613 */ 614 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 615 pr0.ndpr_raf_auto = 616 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 617 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 618 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 619 620 /* add the prefix if not yet. */ 621 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 622 /* 623 * nd6_prelist_add will install the corresponding 624 * interface route. 625 */ 626 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 627 if (carp_attached) 628 (*carp_detach_p)(&ia->ia_ifa, false); 629 goto out; 630 } 631 } 632 633 /* relate the address to the prefix */ 634 if (ia->ia6_ndpr == NULL) { 635 ia->ia6_ndpr = pr; 636 pr->ndpr_addrcnt++; 637 638 /* 639 * If this is the first autoconf address from the 640 * prefix, create a temporary address as well 641 * (when required). 642 */ 643 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 644 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 645 int e; 646 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 647 log(LOG_NOTICE, "in6_control: failed " 648 "to create a temporary address, " 649 "errno=%d\n", e); 650 } 651 } 652 } 653 nd6_prefix_rele(pr); 654 655 /* 656 * this might affect the status of autoconfigured addresses, 657 * that is, this address might make other addresses detached. 658 */ 659 pfxlist_onlink_check(); 660 661 aifaddr_out: 662 /* 663 * Try to clear the flag when a new IPv6 address is added 664 * onto an IFDISABLED interface and it succeeds. 665 */ 666 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 667 struct in6_ndireq nd; 668 669 memset(&nd, 0, sizeof(nd)); 670 nd.ndi.flags = ND_IFINFO(ifp)->flags; 671 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 672 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 673 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 674 "SIOCSIFINFO_FLAGS for -ifdisabled " 675 "failed."); 676 /* 677 * Ignore failure of clearing the flag intentionally. 678 * The failure means address duplication was detected. 679 */ 680 } 681 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 682 break; 683 } 684 685 case SIOCDIFADDR_IN6: 686 { 687 struct nd_prefix *pr; 688 689 /* 690 * If the address being deleted is the only one that owns 691 * the corresponding prefix, expire the prefix as well. 692 * XXX: theoretically, we don't have to worry about such 693 * relationship, since we separate the address management 694 * and the prefix management. We do this, however, to provide 695 * as much backward compatibility as possible in terms of 696 * the ioctl operation. 697 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 698 */ 699 pr = ia->ia6_ndpr; 700 in6_purgeaddr(&ia->ia_ifa); 701 if (pr != NULL && pr->ndpr_addrcnt == 0) { 702 ND6_WLOCK(); 703 nd6_prefix_unlink(pr, NULL); 704 ND6_WUNLOCK(); 705 nd6_prefix_del(pr); 706 } 707 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 708 break; 709 } 710 711 default: 712 if (ifp->if_ioctl == NULL) { 713 error = EOPNOTSUPP; 714 goto out; 715 } 716 error = (*ifp->if_ioctl)(ifp, cmd, data); 717 goto out; 718 } 719 720 error = 0; 721 out: 722 if (ia != NULL) 723 ifa_free(&ia->ia_ifa); 724 return (error); 725 } 726 727 728 /* 729 * Join necessary multicast groups. Factored out from in6_update_ifa(). 730 * This entire work should only be done once, for the default FIB. 731 */ 732 static int 733 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 734 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 735 { 736 char ip6buf[INET6_ADDRSTRLEN]; 737 struct in6_addr mltaddr; 738 struct in6_multi_mship *imm; 739 int delay, error; 740 741 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 742 743 /* Join solicited multicast addr for new host id. */ 744 bzero(&mltaddr, sizeof(struct in6_addr)); 745 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 746 mltaddr.s6_addr32[2] = htonl(1); 747 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 748 mltaddr.s6_addr8[12] = 0xff; 749 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 750 /* XXX: should not happen */ 751 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 752 goto cleanup; 753 } 754 delay = error = 0; 755 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 756 /* 757 * We need a random delay for DAD on the address being 758 * configured. It also means delaying transmission of the 759 * corresponding MLD report to avoid report collision. 760 * [RFC 4861, Section 6.3.7] 761 */ 762 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 763 } 764 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 765 if (imm == NULL) { 766 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 767 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 768 if_name(ifp), error)); 769 goto cleanup; 770 } 771 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 772 *in6m_sol = imm->i6mm_maddr; 773 774 /* 775 * Join link-local all-nodes address. 776 */ 777 mltaddr = in6addr_linklocal_allnodes; 778 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 779 goto cleanup; /* XXX: should not fail */ 780 781 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 782 if (imm == NULL) { 783 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 784 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 785 if_name(ifp), error)); 786 goto cleanup; 787 } 788 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 789 790 /* 791 * Join node information group address. 792 */ 793 delay = 0; 794 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 795 /* 796 * The spec does not say anything about delay for this group, 797 * but the same logic should apply. 798 */ 799 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 800 } 801 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 802 /* XXX jinmei */ 803 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 804 if (imm == NULL) 805 nd6log((LOG_WARNING, 806 "%s: in6_joingroup failed for %s on %s " 807 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 808 &mltaddr), if_name(ifp), error)); 809 /* XXX not very fatal, go on... */ 810 else 811 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 812 } 813 if (V_icmp6_nodeinfo_oldmcprefix && 814 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 815 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 816 if (imm == NULL) 817 nd6log((LOG_WARNING, 818 "%s: in6_joingroup failed for %s on %s " 819 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 820 &mltaddr), if_name(ifp), error)); 821 /* XXX not very fatal, go on... */ 822 else 823 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 824 } 825 826 /* 827 * Join interface-local all-nodes address. 828 * (ff01::1%ifN, and ff01::%ifN/32) 829 */ 830 mltaddr = in6addr_nodelocal_allnodes; 831 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 832 goto cleanup; /* XXX: should not fail */ 833 834 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 835 if (imm == NULL) { 836 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 837 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 838 &mltaddr), if_name(ifp), error)); 839 goto cleanup; 840 } 841 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 842 843 cleanup: 844 return (error); 845 } 846 847 /* 848 * Update parameters of an IPv6 interface address. 849 * If necessary, a new entry is created and linked into address chains. 850 * This function is separated from in6_control(). 851 */ 852 int 853 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 854 struct in6_ifaddr *ia, int flags) 855 { 856 int error, hostIsNew = 0; 857 858 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 859 return (error); 860 861 if (ia == NULL) { 862 hostIsNew = 1; 863 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 864 return (ENOBUFS); 865 } 866 867 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 868 if (error != 0) { 869 if (hostIsNew != 0) { 870 in6_unlink_ifa(ia, ifp); 871 ifa_free(&ia->ia_ifa); 872 } 873 return (error); 874 } 875 876 if (hostIsNew) 877 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 878 879 return (error); 880 } 881 882 /* 883 * Fill in basic IPv6 address request info. 884 */ 885 void 886 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 887 const struct in6_addr *mask) 888 { 889 890 memset(ifra, 0, sizeof(struct in6_aliasreq)); 891 892 ifra->ifra_addr.sin6_family = AF_INET6; 893 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 894 if (addr != NULL) 895 ifra->ifra_addr.sin6_addr = *addr; 896 897 ifra->ifra_prefixmask.sin6_family = AF_INET6; 898 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 899 if (mask != NULL) 900 ifra->ifra_prefixmask.sin6_addr = *mask; 901 } 902 903 static int 904 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 905 struct in6_ifaddr *ia, int flags) 906 { 907 int plen = -1; 908 struct sockaddr_in6 dst6; 909 struct in6_addrlifetime *lt; 910 char ip6buf[INET6_ADDRSTRLEN]; 911 912 /* Validate parameters */ 913 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 914 return (EINVAL); 915 916 /* 917 * The destination address for a p2p link must have a family 918 * of AF_UNSPEC or AF_INET6. 919 */ 920 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 921 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 922 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 923 return (EAFNOSUPPORT); 924 925 /* 926 * Validate address 927 */ 928 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 929 ifra->ifra_addr.sin6_family != AF_INET6) 930 return (EINVAL); 931 932 /* 933 * validate ifra_prefixmask. don't check sin6_family, netmask 934 * does not carry fields other than sin6_len. 935 */ 936 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 937 return (EINVAL); 938 /* 939 * Because the IPv6 address architecture is classless, we require 940 * users to specify a (non 0) prefix length (mask) for a new address. 941 * We also require the prefix (when specified) mask is valid, and thus 942 * reject a non-consecutive mask. 943 */ 944 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 945 return (EINVAL); 946 if (ifra->ifra_prefixmask.sin6_len != 0) { 947 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 948 (u_char *)&ifra->ifra_prefixmask + 949 ifra->ifra_prefixmask.sin6_len); 950 if (plen <= 0) 951 return (EINVAL); 952 } else { 953 /* 954 * In this case, ia must not be NULL. We just use its prefix 955 * length. 956 */ 957 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 958 } 959 /* 960 * If the destination address on a p2p interface is specified, 961 * and the address is a scoped one, validate/set the scope 962 * zone identifier. 963 */ 964 dst6 = ifra->ifra_dstaddr; 965 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 966 (dst6.sin6_family == AF_INET6)) { 967 struct in6_addr in6_tmp; 968 u_int32_t zoneid; 969 970 in6_tmp = dst6.sin6_addr; 971 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 972 return (EINVAL); /* XXX: should be impossible */ 973 974 if (dst6.sin6_scope_id != 0) { 975 if (dst6.sin6_scope_id != zoneid) 976 return (EINVAL); 977 } else /* user omit to specify the ID. */ 978 dst6.sin6_scope_id = zoneid; 979 980 /* convert into the internal form */ 981 if (sa6_embedscope(&dst6, 0)) 982 return (EINVAL); /* XXX: should be impossible */ 983 } 984 /* Modify original ifra_dstaddr to reflect changes */ 985 ifra->ifra_dstaddr = dst6; 986 987 /* 988 * The destination address can be specified only for a p2p or a 989 * loopback interface. If specified, the corresponding prefix length 990 * must be 128. 991 */ 992 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 993 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 994 /* XXX: noisy message */ 995 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 996 "be specified for a p2p or a loopback IF only\n")); 997 return (EINVAL); 998 } 999 if (plen != 128) { 1000 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1001 "be 128 when dstaddr is specified\n")); 1002 return (EINVAL); 1003 } 1004 } 1005 /* lifetime consistency check */ 1006 lt = &ifra->ifra_lifetime; 1007 if (lt->ia6t_pltime > lt->ia6t_vltime) 1008 return (EINVAL); 1009 if (lt->ia6t_vltime == 0) { 1010 /* 1011 * the following log might be noisy, but this is a typical 1012 * configuration mistake or a tool's bug. 1013 */ 1014 nd6log((LOG_INFO, 1015 "in6_update_ifa: valid lifetime is 0 for %s\n", 1016 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1017 1018 if (ia == NULL) 1019 return (0); /* there's nothing to do */ 1020 } 1021 1022 /* Check prefix mask */ 1023 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1024 /* 1025 * We prohibit changing the prefix length of an existing 1026 * address, because 1027 * + such an operation should be rare in IPv6, and 1028 * + the operation would confuse prefix management. 1029 */ 1030 if (ia->ia_prefixmask.sin6_len != 0 && 1031 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1032 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1033 "of an existing %s address should not be changed\n", 1034 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1035 1036 return (EINVAL); 1037 } 1038 } 1039 1040 return (0); 1041 } 1042 1043 1044 /* 1045 * Allocate a new ifaddr and link it into chains. 1046 */ 1047 static struct in6_ifaddr * 1048 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1049 { 1050 struct in6_ifaddr *ia; 1051 1052 /* 1053 * When in6_alloc_ifa() is called in a process of a received 1054 * RA, it is called under an interrupt context. So, we should 1055 * call malloc with M_NOWAIT. 1056 */ 1057 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1058 if (ia == NULL) 1059 return (NULL); 1060 LIST_INIT(&ia->ia6_memberships); 1061 /* Initialize the address and masks, and put time stamp */ 1062 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1063 ia->ia_addr.sin6_family = AF_INET6; 1064 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1065 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1066 ia->ia_addr = ifra->ifra_addr; 1067 ia->ia6_createtime = time_uptime; 1068 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1069 /* 1070 * Some functions expect that ifa_dstaddr is not 1071 * NULL for p2p interfaces. 1072 */ 1073 ia->ia_ifa.ifa_dstaddr = 1074 (struct sockaddr *)&ia->ia_dstaddr; 1075 } else { 1076 ia->ia_ifa.ifa_dstaddr = NULL; 1077 } 1078 1079 /* set prefix mask if any */ 1080 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1081 if (ifra->ifra_prefixmask.sin6_len != 0) { 1082 ia->ia_prefixmask.sin6_family = AF_INET6; 1083 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1084 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1085 } 1086 1087 ia->ia_ifp = ifp; 1088 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1089 IF_ADDR_WLOCK(ifp); 1090 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1091 IF_ADDR_WUNLOCK(ifp); 1092 1093 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1094 IN6_IFADDR_WLOCK(); 1095 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1096 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1097 IN6_IFADDR_WUNLOCK(); 1098 1099 return (ia); 1100 } 1101 1102 /* 1103 * Update/configure interface address parameters: 1104 * 1105 * 1) Update lifetime 1106 * 2) Update interface metric ad flags 1107 * 3) Notify other subsystems 1108 */ 1109 static int 1110 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1111 struct in6_ifaddr *ia, int hostIsNew, int flags) 1112 { 1113 int error; 1114 1115 /* update timestamp */ 1116 ia->ia6_updatetime = time_uptime; 1117 1118 /* 1119 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1120 * to see if the address is deprecated or invalidated, but initialize 1121 * these members for applications. 1122 */ 1123 ia->ia6_lifetime = ifra->ifra_lifetime; 1124 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1125 ia->ia6_lifetime.ia6t_expire = 1126 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1127 } else 1128 ia->ia6_lifetime.ia6t_expire = 0; 1129 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1130 ia->ia6_lifetime.ia6t_preferred = 1131 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1132 } else 1133 ia->ia6_lifetime.ia6t_preferred = 0; 1134 1135 /* 1136 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1137 * userland, make it deprecated. 1138 */ 1139 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1140 ia->ia6_lifetime.ia6t_pltime = 0; 1141 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1142 } 1143 1144 /* 1145 * configure address flags. 1146 */ 1147 ia->ia6_flags = ifra->ifra_flags; 1148 1149 /* 1150 * Make the address tentative before joining multicast addresses, 1151 * so that corresponding MLD responses would not have a tentative 1152 * source address. 1153 */ 1154 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1155 1156 /* 1157 * DAD should be performed for an new address or addresses on 1158 * an interface with ND6_IFF_IFDISABLED. 1159 */ 1160 if (in6if_do_dad(ifp) && 1161 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1162 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1163 1164 /* notify other subsystems */ 1165 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1166 1167 return (error); 1168 } 1169 1170 /* 1171 * Do link-level ifa job: 1172 * 1) Add lle entry for added address 1173 * 2) Notifies routing socket users about new address 1174 * 3) join appropriate multicast group 1175 * 4) start DAD if enabled 1176 */ 1177 static int 1178 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1179 struct in6_ifaddr *ia, int flags) 1180 { 1181 struct in6_multi *in6m_sol; 1182 int error = 0; 1183 1184 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1185 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1186 in6_purgeaddr(&ia->ia_ifa); 1187 ifa_free(&ia->ia_ifa); 1188 return (error); 1189 } 1190 1191 /* Join necessary multicast groups. */ 1192 in6m_sol = NULL; 1193 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1194 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1195 if (error != 0) { 1196 in6_purgeaddr(&ia->ia_ifa); 1197 ifa_free(&ia->ia_ifa); 1198 return (error); 1199 } 1200 } 1201 1202 /* Perform DAD, if the address is TENTATIVE. */ 1203 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1204 int delay, mindelay, maxdelay; 1205 1206 delay = 0; 1207 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1208 /* 1209 * We need to impose a delay before sending an NS 1210 * for DAD. Check if we also needed a delay for the 1211 * corresponding MLD message. If we did, the delay 1212 * should be larger than the MLD delay (this could be 1213 * relaxed a bit, but this simple logic is at least 1214 * safe). 1215 * XXX: Break data hiding guidelines and look at 1216 * state for the solicited multicast group. 1217 */ 1218 mindelay = 0; 1219 if (in6m_sol != NULL && 1220 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1221 mindelay = in6m_sol->in6m_timer; 1222 } 1223 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1224 if (maxdelay - mindelay == 0) 1225 delay = 0; 1226 else { 1227 delay = 1228 (arc4random() % (maxdelay - mindelay)) + 1229 mindelay; 1230 } 1231 } 1232 nd6_dad_start((struct ifaddr *)ia, delay); 1233 } 1234 1235 in6_newaddrmsg(ia, RTM_ADD); 1236 ifa_free(&ia->ia_ifa); 1237 return (error); 1238 } 1239 1240 void 1241 in6_purgeaddr(struct ifaddr *ifa) 1242 { 1243 struct ifnet *ifp = ifa->ifa_ifp; 1244 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1245 struct in6_multi_mship *imm; 1246 int plen, error; 1247 1248 if (ifa->ifa_carp) 1249 (*carp_detach_p)(ifa, false); 1250 1251 /* 1252 * Remove the loopback route to the interface address. 1253 * The check for the current setting of "nd6_useloopback" 1254 * is not needed. 1255 */ 1256 if (ia->ia_flags & IFA_RTSELF) { 1257 error = ifa_del_loopback_route((struct ifaddr *)ia, 1258 (struct sockaddr *)&ia->ia_addr); 1259 if (error == 0) 1260 ia->ia_flags &= ~IFA_RTSELF; 1261 } 1262 1263 /* stop DAD processing */ 1264 nd6_dad_stop(ifa); 1265 1266 /* Leave multicast groups. */ 1267 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1268 LIST_REMOVE(imm, i6mm_chain); 1269 in6_leavegroup(imm); 1270 } 1271 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1272 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1273 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1274 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1275 if (error != 0) 1276 log(LOG_INFO, "%s: err=%d, destination address delete " 1277 "failed\n", __func__, error); 1278 ia->ia_flags &= ~IFA_ROUTE; 1279 } 1280 1281 in6_newaddrmsg(ia, RTM_DELETE); 1282 in6_unlink_ifa(ia, ifp); 1283 } 1284 1285 static void 1286 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1287 { 1288 char ip6buf[INET6_ADDRSTRLEN]; 1289 int remove_lle; 1290 1291 IF_ADDR_WLOCK(ifp); 1292 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1293 IF_ADDR_WUNLOCK(ifp); 1294 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1295 1296 /* 1297 * Defer the release of what might be the last reference to the 1298 * in6_ifaddr so that it can't be freed before the remainder of the 1299 * cleanup. 1300 */ 1301 IN6_IFADDR_WLOCK(); 1302 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1303 LIST_REMOVE(ia, ia6_hash); 1304 IN6_IFADDR_WUNLOCK(); 1305 1306 /* 1307 * Release the reference to the base prefix. There should be a 1308 * positive reference. 1309 */ 1310 remove_lle = 0; 1311 if (ia->ia6_ndpr == NULL) { 1312 nd6log((LOG_NOTICE, 1313 "in6_unlink_ifa: autoconf'ed address " 1314 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1315 } else { 1316 ia->ia6_ndpr->ndpr_addrcnt--; 1317 /* Do not delete lles within prefix if refcont != 0 */ 1318 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1319 remove_lle = 1; 1320 ia->ia6_ndpr = NULL; 1321 } 1322 1323 nd6_rem_ifa_lle(ia, remove_lle); 1324 1325 /* 1326 * Also, if the address being removed is autoconf'ed, call 1327 * pfxlist_onlink_check() since the release might affect the status of 1328 * other (detached) addresses. 1329 */ 1330 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1331 pfxlist_onlink_check(); 1332 } 1333 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1334 } 1335 1336 /* 1337 * Notifies other subsystems about address change/arrival: 1338 * 1) Notifies device handler on the first IPv6 address assignment 1339 * 2) Handle routing table changes for P2P links and route 1340 * 3) Handle routing table changes for address host route 1341 */ 1342 static int 1343 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1344 struct in6_aliasreq *ifra, int hostIsNew) 1345 { 1346 int error = 0, plen, ifacount = 0; 1347 struct ifaddr *ifa; 1348 struct sockaddr_in6 *pdst; 1349 char ip6buf[INET6_ADDRSTRLEN]; 1350 1351 /* 1352 * Give the interface a chance to initialize 1353 * if this is its first address, 1354 */ 1355 if (hostIsNew != 0) { 1356 IF_ADDR_RLOCK(ifp); 1357 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1358 if (ifa->ifa_addr->sa_family != AF_INET6) 1359 continue; 1360 ifacount++; 1361 } 1362 IF_ADDR_RUNLOCK(ifp); 1363 } 1364 1365 if (ifacount <= 1 && ifp->if_ioctl) { 1366 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1367 if (error) 1368 return (error); 1369 } 1370 1371 /* 1372 * If a new destination address is specified, scrub the old one and 1373 * install the new destination. Note that the interface must be 1374 * p2p or loopback. 1375 */ 1376 pdst = &ifra->ifra_dstaddr; 1377 if (pdst->sin6_family == AF_INET6 && 1378 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1379 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1380 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1381 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1382 "remove a route to the old destination: %s\n", 1383 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1384 /* proceed anyway... */ 1385 } else 1386 ia->ia_flags &= ~IFA_ROUTE; 1387 ia->ia_dstaddr = *pdst; 1388 } 1389 1390 /* 1391 * If a new destination address is specified for a point-to-point 1392 * interface, install a route to the destination as an interface 1393 * direct route. 1394 * XXX: the logic below rejects assigning multiple addresses on a p2p 1395 * interface that share the same destination. 1396 */ 1397 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1398 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1399 ia->ia_dstaddr.sin6_family == AF_INET6) { 1400 int rtflags = RTF_UP | RTF_HOST; 1401 /* 1402 * Handle the case for ::1 . 1403 */ 1404 if (ifp->if_flags & IFF_LOOPBACK) 1405 ia->ia_flags |= IFA_RTSELF; 1406 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1407 if (error) 1408 return (error); 1409 ia->ia_flags |= IFA_ROUTE; 1410 } 1411 1412 /* 1413 * add a loopback route to self if not exists 1414 */ 1415 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1416 error = ifa_add_loopback_route((struct ifaddr *)ia, 1417 (struct sockaddr *)&ia->ia_addr); 1418 if (error == 0) 1419 ia->ia_flags |= IFA_RTSELF; 1420 } 1421 1422 return (error); 1423 } 1424 1425 /* 1426 * Find an IPv6 interface link-local address specific to an interface. 1427 * ifaddr is returned referenced. 1428 */ 1429 struct in6_ifaddr * 1430 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1431 { 1432 struct ifaddr *ifa; 1433 1434 IF_ADDR_RLOCK(ifp); 1435 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1436 if (ifa->ifa_addr->sa_family != AF_INET6) 1437 continue; 1438 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1439 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1440 ignoreflags) != 0) 1441 continue; 1442 ifa_ref(ifa); 1443 break; 1444 } 1445 } 1446 IF_ADDR_RUNLOCK(ifp); 1447 1448 return ((struct in6_ifaddr *)ifa); 1449 } 1450 1451 1452 /* 1453 * find the internet address corresponding to a given address. 1454 * ifaddr is returned referenced. 1455 */ 1456 struct in6_ifaddr * 1457 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1458 { 1459 struct rm_priotracker in6_ifa_tracker; 1460 struct in6_ifaddr *ia; 1461 1462 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1463 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1464 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1465 if (zoneid != 0 && 1466 zoneid != ia->ia_addr.sin6_scope_id) 1467 continue; 1468 ifa_ref(&ia->ia_ifa); 1469 break; 1470 } 1471 } 1472 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1473 return (ia); 1474 } 1475 1476 /* 1477 * find the internet address corresponding to a given interface and address. 1478 * ifaddr is returned referenced. 1479 */ 1480 struct in6_ifaddr * 1481 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1482 { 1483 struct ifaddr *ifa; 1484 1485 IF_ADDR_RLOCK(ifp); 1486 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1487 if (ifa->ifa_addr->sa_family != AF_INET6) 1488 continue; 1489 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1490 ifa_ref(ifa); 1491 break; 1492 } 1493 } 1494 IF_ADDR_RUNLOCK(ifp); 1495 1496 return ((struct in6_ifaddr *)ifa); 1497 } 1498 1499 /* 1500 * Find a link-local scoped address on ifp and return it if any. 1501 */ 1502 struct in6_ifaddr * 1503 in6ifa_llaonifp(struct ifnet *ifp) 1504 { 1505 struct sockaddr_in6 *sin6; 1506 struct ifaddr *ifa; 1507 1508 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1509 return (NULL); 1510 IF_ADDR_RLOCK(ifp); 1511 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1512 if (ifa->ifa_addr->sa_family != AF_INET6) 1513 continue; 1514 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1515 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1516 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1517 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1518 break; 1519 } 1520 IF_ADDR_RUNLOCK(ifp); 1521 1522 return ((struct in6_ifaddr *)ifa); 1523 } 1524 1525 /* 1526 * Convert IP6 address to printable (loggable) representation. Caller 1527 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1528 */ 1529 static char digits[] = "0123456789abcdef"; 1530 char * 1531 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1532 { 1533 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1534 char *cp; 1535 const u_int16_t *a = (const u_int16_t *)addr; 1536 const u_int8_t *d; 1537 int dcolon = 0, zero = 0; 1538 1539 cp = ip6buf; 1540 1541 for (i = 0; i < 8; i++) { 1542 if (*(a + i) == 0) { 1543 cnt++; 1544 if (cnt == 1) 1545 idx = i; 1546 } 1547 else if (maxcnt < cnt) { 1548 maxcnt = cnt; 1549 index = idx; 1550 cnt = 0; 1551 } 1552 } 1553 if (maxcnt < cnt) { 1554 maxcnt = cnt; 1555 index = idx; 1556 } 1557 1558 for (i = 0; i < 8; i++) { 1559 if (dcolon == 1) { 1560 if (*a == 0) { 1561 if (i == 7) 1562 *cp++ = ':'; 1563 a++; 1564 continue; 1565 } else 1566 dcolon = 2; 1567 } 1568 if (*a == 0) { 1569 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1570 if (i == 0) 1571 *cp++ = ':'; 1572 *cp++ = ':'; 1573 dcolon = 1; 1574 } else { 1575 *cp++ = '0'; 1576 *cp++ = ':'; 1577 } 1578 a++; 1579 continue; 1580 } 1581 d = (const u_char *)a; 1582 /* Try to eliminate leading zeros in printout like in :0001. */ 1583 zero = 1; 1584 *cp = digits[*d >> 4]; 1585 if (*cp != '0') { 1586 zero = 0; 1587 cp++; 1588 } 1589 *cp = digits[*d++ & 0xf]; 1590 if (zero == 0 || (*cp != '0')) { 1591 zero = 0; 1592 cp++; 1593 } 1594 *cp = digits[*d >> 4]; 1595 if (zero == 0 || (*cp != '0')) { 1596 zero = 0; 1597 cp++; 1598 } 1599 *cp++ = digits[*d & 0xf]; 1600 *cp++ = ':'; 1601 a++; 1602 } 1603 *--cp = '\0'; 1604 return (ip6buf); 1605 } 1606 1607 int 1608 in6_localaddr(struct in6_addr *in6) 1609 { 1610 struct rm_priotracker in6_ifa_tracker; 1611 struct in6_ifaddr *ia; 1612 1613 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1614 return 1; 1615 1616 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1617 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1618 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1619 &ia->ia_prefixmask.sin6_addr)) { 1620 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1621 return 1; 1622 } 1623 } 1624 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1625 1626 return (0); 1627 } 1628 1629 /* 1630 * Return 1 if an internet address is for the local host and configured 1631 * on one of its interfaces. 1632 */ 1633 int 1634 in6_localip(struct in6_addr *in6) 1635 { 1636 struct rm_priotracker in6_ifa_tracker; 1637 struct in6_ifaddr *ia; 1638 1639 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1640 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1641 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1642 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1643 return (1); 1644 } 1645 } 1646 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1647 return (0); 1648 } 1649 1650 /* 1651 * Return 1 if an internet address is configured on an interface. 1652 */ 1653 int 1654 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1655 { 1656 struct in6_addr in6; 1657 struct ifaddr *ifa; 1658 struct in6_ifaddr *ia6; 1659 1660 in6 = *addr; 1661 if (in6_clearscope(&in6)) 1662 return (0); 1663 in6_setscope(&in6, ifp, NULL); 1664 1665 IF_ADDR_RLOCK(ifp); 1666 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1667 if (ifa->ifa_addr->sa_family != AF_INET6) 1668 continue; 1669 ia6 = (struct in6_ifaddr *)ifa; 1670 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1671 IF_ADDR_RUNLOCK(ifp); 1672 return (1); 1673 } 1674 } 1675 IF_ADDR_RUNLOCK(ifp); 1676 1677 return (0); 1678 } 1679 1680 int 1681 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1682 { 1683 struct rm_priotracker in6_ifa_tracker; 1684 struct in6_ifaddr *ia; 1685 1686 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1687 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1688 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1689 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1691 return (1); /* true */ 1692 } 1693 break; 1694 } 1695 } 1696 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1697 1698 return (0); /* false */ 1699 } 1700 1701 /* 1702 * return length of part which dst and src are equal 1703 * hard coding... 1704 */ 1705 int 1706 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1707 { 1708 int match = 0; 1709 u_char *s = (u_char *)src, *d = (u_char *)dst; 1710 u_char *lim = s + 16, r; 1711 1712 while (s < lim) 1713 if ((r = (*d++ ^ *s++)) != 0) { 1714 while (r < 128) { 1715 match++; 1716 r <<= 1; 1717 } 1718 break; 1719 } else 1720 match += 8; 1721 return match; 1722 } 1723 1724 /* XXX: to be scope conscious */ 1725 int 1726 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1727 { 1728 int bytelen, bitlen; 1729 1730 /* sanity check */ 1731 if (0 > len || len > 128) { 1732 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1733 len); 1734 return (0); 1735 } 1736 1737 bytelen = len / 8; 1738 bitlen = len % 8; 1739 1740 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1741 return (0); 1742 if (bitlen != 0 && 1743 p1->s6_addr[bytelen] >> (8 - bitlen) != 1744 p2->s6_addr[bytelen] >> (8 - bitlen)) 1745 return (0); 1746 1747 return (1); 1748 } 1749 1750 void 1751 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1752 { 1753 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1754 int bytelen, bitlen, i; 1755 1756 /* sanity check */ 1757 if (0 > len || len > 128) { 1758 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1759 len); 1760 return; 1761 } 1762 1763 bzero(maskp, sizeof(*maskp)); 1764 bytelen = len / 8; 1765 bitlen = len % 8; 1766 for (i = 0; i < bytelen; i++) 1767 maskp->s6_addr[i] = 0xff; 1768 if (bitlen) 1769 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1770 } 1771 1772 /* 1773 * return the best address out of the same scope. if no address was 1774 * found, return the first valid address from designated IF. 1775 */ 1776 struct in6_ifaddr * 1777 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1778 { 1779 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1780 struct ifaddr *ifa; 1781 struct in6_ifaddr *besta = NULL; 1782 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1783 1784 dep[0] = dep[1] = NULL; 1785 1786 /* 1787 * We first look for addresses in the same scope. 1788 * If there is one, return it. 1789 * If two or more, return one which matches the dst longest. 1790 * If none, return one of global addresses assigned other ifs. 1791 */ 1792 IF_ADDR_RLOCK(ifp); 1793 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1794 if (ifa->ifa_addr->sa_family != AF_INET6) 1795 continue; 1796 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1797 continue; /* XXX: is there any case to allow anycast? */ 1798 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1799 continue; /* don't use this interface */ 1800 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1801 continue; 1802 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1803 if (V_ip6_use_deprecated) 1804 dep[0] = (struct in6_ifaddr *)ifa; 1805 continue; 1806 } 1807 1808 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1809 /* 1810 * call in6_matchlen() as few as possible 1811 */ 1812 if (besta) { 1813 if (blen == -1) 1814 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1815 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1816 if (tlen > blen) { 1817 blen = tlen; 1818 besta = (struct in6_ifaddr *)ifa; 1819 } 1820 } else 1821 besta = (struct in6_ifaddr *)ifa; 1822 } 1823 } 1824 if (besta) { 1825 ifa_ref(&besta->ia_ifa); 1826 IF_ADDR_RUNLOCK(ifp); 1827 return (besta); 1828 } 1829 1830 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1831 if (ifa->ifa_addr->sa_family != AF_INET6) 1832 continue; 1833 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1834 continue; /* XXX: is there any case to allow anycast? */ 1835 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1836 continue; /* don't use this interface */ 1837 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1838 continue; 1839 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1840 if (V_ip6_use_deprecated) 1841 dep[1] = (struct in6_ifaddr *)ifa; 1842 continue; 1843 } 1844 1845 if (ifa != NULL) 1846 ifa_ref(ifa); 1847 IF_ADDR_RUNLOCK(ifp); 1848 return (struct in6_ifaddr *)ifa; 1849 } 1850 1851 /* use the last-resort values, that are, deprecated addresses */ 1852 if (dep[0]) { 1853 ifa_ref((struct ifaddr *)dep[0]); 1854 IF_ADDR_RUNLOCK(ifp); 1855 return dep[0]; 1856 } 1857 if (dep[1]) { 1858 ifa_ref((struct ifaddr *)dep[1]); 1859 IF_ADDR_RUNLOCK(ifp); 1860 return dep[1]; 1861 } 1862 1863 IF_ADDR_RUNLOCK(ifp); 1864 return NULL; 1865 } 1866 1867 /* 1868 * perform DAD when interface becomes IFF_UP. 1869 */ 1870 void 1871 in6_if_up(struct ifnet *ifp) 1872 { 1873 struct ifaddr *ifa; 1874 struct in6_ifaddr *ia; 1875 1876 IF_ADDR_RLOCK(ifp); 1877 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1878 if (ifa->ifa_addr->sa_family != AF_INET6) 1879 continue; 1880 ia = (struct in6_ifaddr *)ifa; 1881 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1882 /* 1883 * The TENTATIVE flag was likely set by hand 1884 * beforehand, implicitly indicating the need for DAD. 1885 * We may be able to skip the random delay in this 1886 * case, but we impose delays just in case. 1887 */ 1888 nd6_dad_start(ifa, 1889 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1890 } 1891 } 1892 IF_ADDR_RUNLOCK(ifp); 1893 1894 /* 1895 * special cases, like 6to4, are handled in in6_ifattach 1896 */ 1897 in6_ifattach(ifp, NULL); 1898 } 1899 1900 int 1901 in6if_do_dad(struct ifnet *ifp) 1902 { 1903 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1904 return (0); 1905 1906 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1907 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1908 return (0); 1909 1910 /* 1911 * Our DAD routine requires the interface up and running. 1912 * However, some interfaces can be up before the RUNNING 1913 * status. Additionally, users may try to assign addresses 1914 * before the interface becomes up (or running). 1915 * This function returns EAGAIN in that case. 1916 * The caller should mark "tentative" on the address instead of 1917 * performing DAD immediately. 1918 */ 1919 if (!((ifp->if_flags & IFF_UP) && 1920 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1921 return (EAGAIN); 1922 1923 return (1); 1924 } 1925 1926 /* 1927 * Calculate max IPv6 MTU through all the interfaces and store it 1928 * to in6_maxmtu. 1929 */ 1930 void 1931 in6_setmaxmtu(void) 1932 { 1933 unsigned long maxmtu = 0; 1934 struct ifnet *ifp; 1935 1936 IFNET_RLOCK_NOSLEEP(); 1937 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1938 /* this function can be called during ifnet initialization */ 1939 if (!ifp->if_afdata[AF_INET6]) 1940 continue; 1941 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1942 IN6_LINKMTU(ifp) > maxmtu) 1943 maxmtu = IN6_LINKMTU(ifp); 1944 } 1945 IFNET_RUNLOCK_NOSLEEP(); 1946 if (maxmtu) /* update only when maxmtu is positive */ 1947 V_in6_maxmtu = maxmtu; 1948 } 1949 1950 /* 1951 * Provide the length of interface identifiers to be used for the link attached 1952 * to the given interface. The length should be defined in "IPv6 over 1953 * xxx-link" document. Note that address architecture might also define 1954 * the length for a particular set of address prefixes, regardless of the 1955 * link type. As clarified in rfc2462bis, those two definitions should be 1956 * consistent, and those really are as of August 2004. 1957 */ 1958 int 1959 in6_if2idlen(struct ifnet *ifp) 1960 { 1961 switch (ifp->if_type) { 1962 case IFT_ETHER: /* RFC2464 */ 1963 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 1964 case IFT_L2VLAN: /* ditto */ 1965 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 1966 case IFT_INFINIBAND: 1967 return (64); 1968 case IFT_FDDI: /* RFC2467 */ 1969 return (64); 1970 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 1971 return (64); 1972 case IFT_PPP: /* RFC2472 */ 1973 return (64); 1974 case IFT_ARCNET: /* RFC2497 */ 1975 return (64); 1976 case IFT_FRELAY: /* RFC2590 */ 1977 return (64); 1978 case IFT_IEEE1394: /* RFC3146 */ 1979 return (64); 1980 case IFT_GIF: 1981 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 1982 case IFT_LOOP: 1983 return (64); /* XXX: is this really correct? */ 1984 default: 1985 /* 1986 * Unknown link type: 1987 * It might be controversial to use the today's common constant 1988 * of 64 for these cases unconditionally. For full compliance, 1989 * we should return an error in this case. On the other hand, 1990 * if we simply miss the standard for the link type or a new 1991 * standard is defined for a new link type, the IFID length 1992 * is very likely to be the common constant. As a compromise, 1993 * we always use the constant, but make an explicit notice 1994 * indicating the "unknown" case. 1995 */ 1996 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 1997 return (64); 1998 } 1999 } 2000 2001 #include <sys/sysctl.h> 2002 2003 struct in6_llentry { 2004 struct llentry base; 2005 }; 2006 2007 #define IN6_LLTBL_DEFAULT_HSIZE 32 2008 #define IN6_LLTBL_HASH(k, h) \ 2009 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2010 2011 /* 2012 * Do actual deallocation of @lle. 2013 */ 2014 static void 2015 in6_lltable_destroy_lle_unlocked(struct llentry *lle) 2016 { 2017 2018 LLE_LOCK_DESTROY(lle); 2019 LLE_REQ_DESTROY(lle); 2020 free(lle, M_LLTABLE); 2021 } 2022 2023 /* 2024 * Called by LLE_FREE_LOCKED when number of references 2025 * drops to zero. 2026 */ 2027 static void 2028 in6_lltable_destroy_lle(struct llentry *lle) 2029 { 2030 2031 LLE_WUNLOCK(lle); 2032 in6_lltable_destroy_lle_unlocked(lle); 2033 } 2034 2035 static struct llentry * 2036 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2037 { 2038 struct in6_llentry *lle; 2039 2040 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2041 if (lle == NULL) /* NB: caller generates msg */ 2042 return NULL; 2043 2044 lle->base.r_l3addr.addr6 = *addr6; 2045 lle->base.lle_refcnt = 1; 2046 lle->base.lle_free = in6_lltable_destroy_lle; 2047 LLE_LOCK_INIT(&lle->base); 2048 LLE_REQ_INIT(&lle->base); 2049 callout_init(&lle->base.lle_timer, 1); 2050 2051 return (&lle->base); 2052 } 2053 2054 static int 2055 in6_lltable_match_prefix(const struct sockaddr *saddr, 2056 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2057 { 2058 const struct in6_addr *addr, *mask, *lle_addr; 2059 2060 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2061 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2062 lle_addr = &lle->r_l3addr.addr6; 2063 2064 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2065 return (0); 2066 2067 if (lle->la_flags & LLE_IFADDR) { 2068 2069 /* 2070 * Delete LLE_IFADDR records IFF address & flag matches. 2071 * Note that addr is the interface address within prefix 2072 * being matched. 2073 */ 2074 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2075 (flags & LLE_STATIC) != 0) 2076 return (1); 2077 return (0); 2078 } 2079 2080 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2081 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2082 return (1); 2083 2084 return (0); 2085 } 2086 2087 static void 2088 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2089 { 2090 struct ifnet *ifp; 2091 2092 LLE_WLOCK_ASSERT(lle); 2093 KASSERT(llt != NULL, ("lltable is NULL")); 2094 2095 /* Unlink entry from table */ 2096 if ((lle->la_flags & LLE_LINKED) != 0) { 2097 2098 ifp = llt->llt_ifp; 2099 IF_AFDATA_WLOCK_ASSERT(ifp); 2100 lltable_unlink_entry(llt, lle); 2101 } 2102 2103 if (callout_stop(&lle->lle_timer) > 0) 2104 LLE_REMREF(lle); 2105 2106 llentry_free(lle); 2107 } 2108 2109 static int 2110 in6_lltable_rtcheck(struct ifnet *ifp, 2111 u_int flags, 2112 const struct sockaddr *l3addr) 2113 { 2114 const struct sockaddr_in6 *sin6; 2115 struct nhop6_basic nh6; 2116 struct in6_addr dst; 2117 uint32_t scopeid; 2118 int error; 2119 char ip6buf[INET6_ADDRSTRLEN]; 2120 2121 KASSERT(l3addr->sa_family == AF_INET6, 2122 ("sin_family %d", l3addr->sa_family)); 2123 2124 /* Our local addresses are always only installed on the default FIB. */ 2125 2126 sin6 = (const struct sockaddr_in6 *)l3addr; 2127 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2128 error = fib6_lookup_nh_basic(RT_DEFAULT_FIB, &dst, scopeid, 0, 0, &nh6); 2129 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2130 struct ifaddr *ifa; 2131 /* 2132 * Create an ND6 cache for an IPv6 neighbor 2133 * that is not covered by our own prefix. 2134 */ 2135 ifa = ifaof_ifpforaddr(l3addr, ifp); 2136 if (ifa != NULL) { 2137 ifa_free(ifa); 2138 return 0; 2139 } 2140 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2141 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2142 return EINVAL; 2143 } 2144 return 0; 2145 } 2146 2147 static inline uint32_t 2148 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2149 { 2150 2151 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2152 } 2153 2154 static uint32_t 2155 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2156 { 2157 2158 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2159 } 2160 2161 static void 2162 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2163 { 2164 struct sockaddr_in6 *sin6; 2165 2166 sin6 = (struct sockaddr_in6 *)sa; 2167 bzero(sin6, sizeof(*sin6)); 2168 sin6->sin6_family = AF_INET6; 2169 sin6->sin6_len = sizeof(*sin6); 2170 sin6->sin6_addr = lle->r_l3addr.addr6; 2171 } 2172 2173 static inline struct llentry * 2174 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2175 { 2176 struct llentry *lle; 2177 struct llentries *lleh; 2178 u_int hashidx; 2179 2180 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2181 lleh = &llt->lle_head[hashidx]; 2182 LIST_FOREACH(lle, lleh, lle_next) { 2183 if (lle->la_flags & LLE_DELETED) 2184 continue; 2185 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2186 break; 2187 } 2188 2189 return (lle); 2190 } 2191 2192 static void 2193 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2194 { 2195 2196 lle->la_flags |= LLE_DELETED; 2197 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2198 #ifdef DIAGNOSTIC 2199 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2200 #endif 2201 llentry_free(lle); 2202 } 2203 2204 static struct llentry * 2205 in6_lltable_alloc(struct lltable *llt, u_int flags, 2206 const struct sockaddr *l3addr) 2207 { 2208 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2209 struct ifnet *ifp = llt->llt_ifp; 2210 struct llentry *lle; 2211 char linkhdr[LLE_MAX_LINKHDR]; 2212 size_t linkhdrsize; 2213 int lladdr_off; 2214 2215 KASSERT(l3addr->sa_family == AF_INET6, 2216 ("sin_family %d", l3addr->sa_family)); 2217 2218 /* 2219 * A route that covers the given address must have 2220 * been installed 1st because we are doing a resolution, 2221 * verify this. 2222 */ 2223 if (!(flags & LLE_IFADDR) && 2224 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2225 return (NULL); 2226 2227 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2228 if (lle == NULL) { 2229 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2230 return (NULL); 2231 } 2232 lle->la_flags = flags; 2233 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2234 linkhdrsize = LLE_MAX_LINKHDR; 2235 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2236 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2237 in6_lltable_destroy_lle_unlocked(lle); 2238 return (NULL); 2239 } 2240 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2241 lladdr_off); 2242 lle->la_flags |= LLE_STATIC; 2243 } 2244 2245 if ((lle->la_flags & LLE_STATIC) != 0) 2246 lle->ln_state = ND6_LLINFO_REACHABLE; 2247 2248 return (lle); 2249 } 2250 2251 static struct llentry * 2252 in6_lltable_lookup(struct lltable *llt, u_int flags, 2253 const struct sockaddr *l3addr) 2254 { 2255 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2256 struct llentry *lle; 2257 2258 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2259 KASSERT(l3addr->sa_family == AF_INET6, 2260 ("sin_family %d", l3addr->sa_family)); 2261 2262 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2263 2264 if (lle == NULL) 2265 return (NULL); 2266 2267 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) != 2268 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X", 2269 flags)); 2270 2271 if (flags & LLE_UNLOCKED) 2272 return (lle); 2273 2274 if (flags & LLE_EXCLUSIVE) 2275 LLE_WLOCK(lle); 2276 else 2277 LLE_RLOCK(lle); 2278 return (lle); 2279 } 2280 2281 static int 2282 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2283 struct sysctl_req *wr) 2284 { 2285 struct ifnet *ifp = llt->llt_ifp; 2286 /* XXX stack use */ 2287 struct { 2288 struct rt_msghdr rtm; 2289 struct sockaddr_in6 sin6; 2290 /* 2291 * ndp.c assumes that sdl is word aligned 2292 */ 2293 #ifdef __LP64__ 2294 uint32_t pad; 2295 #endif 2296 struct sockaddr_dl sdl; 2297 } ndpc; 2298 struct sockaddr_dl *sdl; 2299 int error; 2300 2301 bzero(&ndpc, sizeof(ndpc)); 2302 /* skip deleted entries */ 2303 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2304 return (0); 2305 /* Skip if jailed and not a valid IP of the prison. */ 2306 lltable_fill_sa_entry(lle, 2307 (struct sockaddr *)&ndpc.sin6); 2308 if (prison_if(wr->td->td_ucred, 2309 (struct sockaddr *)&ndpc.sin6) != 0) 2310 return (0); 2311 /* 2312 * produce a msg made of: 2313 * struct rt_msghdr; 2314 * struct sockaddr_in6 (IPv6) 2315 * struct sockaddr_dl; 2316 */ 2317 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2318 ndpc.rtm.rtm_version = RTM_VERSION; 2319 ndpc.rtm.rtm_type = RTM_GET; 2320 ndpc.rtm.rtm_flags = RTF_UP; 2321 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2322 if (V_deembed_scopeid) 2323 sa6_recoverscope(&ndpc.sin6); 2324 2325 /* publish */ 2326 if (lle->la_flags & LLE_PUB) 2327 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2328 2329 sdl = &ndpc.sdl; 2330 sdl->sdl_family = AF_LINK; 2331 sdl->sdl_len = sizeof(*sdl); 2332 sdl->sdl_index = ifp->if_index; 2333 sdl->sdl_type = ifp->if_type; 2334 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2335 sdl->sdl_alen = ifp->if_addrlen; 2336 bcopy(lle->ll_addr, LLADDR(sdl), 2337 ifp->if_addrlen); 2338 } else { 2339 sdl->sdl_alen = 0; 2340 bzero(LLADDR(sdl), ifp->if_addrlen); 2341 } 2342 if (lle->la_expire != 0) 2343 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2344 lle->lle_remtime / hz + 2345 time_second - time_uptime; 2346 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2347 if (lle->la_flags & LLE_STATIC) 2348 ndpc.rtm.rtm_flags |= RTF_STATIC; 2349 if (lle->la_flags & LLE_IFADDR) 2350 ndpc.rtm.rtm_flags |= RTF_PINNED; 2351 if (lle->ln_router != 0) 2352 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2353 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2354 /* Store state in rmx_weight value */ 2355 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2356 ndpc.rtm.rtm_index = ifp->if_index; 2357 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2358 2359 return (error); 2360 } 2361 2362 static struct lltable * 2363 in6_lltattach(struct ifnet *ifp) 2364 { 2365 struct lltable *llt; 2366 2367 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2368 llt->llt_af = AF_INET6; 2369 llt->llt_ifp = ifp; 2370 2371 llt->llt_lookup = in6_lltable_lookup; 2372 llt->llt_alloc_entry = in6_lltable_alloc; 2373 llt->llt_delete_entry = in6_lltable_delete_entry; 2374 llt->llt_dump_entry = in6_lltable_dump_entry; 2375 llt->llt_hash = in6_lltable_hash; 2376 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2377 llt->llt_free_entry = in6_lltable_free_entry; 2378 llt->llt_match_prefix = in6_lltable_match_prefix; 2379 lltable_link(llt); 2380 2381 return (llt); 2382 } 2383 2384 void * 2385 in6_domifattach(struct ifnet *ifp) 2386 { 2387 struct in6_ifextra *ext; 2388 2389 /* There are not IPv6-capable interfaces. */ 2390 switch (ifp->if_type) { 2391 case IFT_PFLOG: 2392 case IFT_PFSYNC: 2393 case IFT_USB: 2394 return (NULL); 2395 } 2396 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2397 bzero(ext, sizeof(*ext)); 2398 2399 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2400 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2401 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2402 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2403 2404 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2405 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2406 M_WAITOK); 2407 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2408 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2409 2410 ext->nd_ifinfo = nd6_ifattach(ifp); 2411 ext->scope6_id = scope6_ifattach(ifp); 2412 ext->lltable = in6_lltattach(ifp); 2413 2414 ext->mld_ifinfo = mld_domifattach(ifp); 2415 2416 return ext; 2417 } 2418 2419 int 2420 in6_domifmtu(struct ifnet *ifp) 2421 { 2422 if (ifp->if_afdata[AF_INET6] == NULL) 2423 return ifp->if_mtu; 2424 2425 return (IN6_LINKMTU(ifp)); 2426 } 2427 2428 void 2429 in6_domifdetach(struct ifnet *ifp, void *aux) 2430 { 2431 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2432 2433 mld_domifdetach(ifp); 2434 scope6_ifdetach(ext->scope6_id); 2435 nd6_ifdetach(ifp, ext->nd_ifinfo); 2436 lltable_free(ext->lltable); 2437 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2438 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2439 free(ext->in6_ifstat, M_IFADDR); 2440 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2441 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2442 free(ext->icmp6_ifstat, M_IFADDR); 2443 free(ext, M_IFADDR); 2444 } 2445 2446 /* 2447 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2448 * v4 mapped addr or v4 compat addr 2449 */ 2450 void 2451 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2452 { 2453 2454 bzero(sin, sizeof(*sin)); 2455 sin->sin_len = sizeof(struct sockaddr_in); 2456 sin->sin_family = AF_INET; 2457 sin->sin_port = sin6->sin6_port; 2458 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2459 } 2460 2461 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2462 void 2463 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2464 { 2465 bzero(sin6, sizeof(*sin6)); 2466 sin6->sin6_len = sizeof(struct sockaddr_in6); 2467 sin6->sin6_family = AF_INET6; 2468 sin6->sin6_port = sin->sin_port; 2469 sin6->sin6_addr.s6_addr32[0] = 0; 2470 sin6->sin6_addr.s6_addr32[1] = 0; 2471 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2472 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2473 } 2474 2475 /* Convert sockaddr_in6 into sockaddr_in. */ 2476 void 2477 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2478 { 2479 struct sockaddr_in *sin_p; 2480 struct sockaddr_in6 sin6; 2481 2482 /* 2483 * Save original sockaddr_in6 addr and convert it 2484 * to sockaddr_in. 2485 */ 2486 sin6 = *(struct sockaddr_in6 *)nam; 2487 sin_p = (struct sockaddr_in *)nam; 2488 in6_sin6_2_sin(sin_p, &sin6); 2489 } 2490 2491 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2492 void 2493 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2494 { 2495 struct sockaddr_in *sin_p; 2496 struct sockaddr_in6 *sin6_p; 2497 2498 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2499 sin_p = (struct sockaddr_in *)*nam; 2500 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2501 free(*nam, M_SONAME); 2502 *nam = (struct sockaddr *)sin6_p; 2503 } 2504