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 ifa_free(&ia->ia_ifa); 559 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 560 == NULL) { 561 /* 562 * this can happen when the user specify the 0 valid 563 * lifetime. 564 */ 565 break; 566 } 567 568 if (cmd == ocmd && ifra->ifra_vhid > 0) { 569 if (carp_attach_p != NULL) 570 error = (*carp_attach_p)(&ia->ia_ifa, 571 ifra->ifra_vhid); 572 else 573 error = EPROTONOSUPPORT; 574 if (error) 575 goto out; 576 else 577 carp_attached = 1; 578 } 579 580 /* 581 * then, make the prefix on-link on the interface. 582 * XXX: we'd rather create the prefix before the address, but 583 * we need at least one address to install the corresponding 584 * interface route, so we configure the address first. 585 */ 586 587 /* 588 * convert mask to prefix length (prefixmask has already 589 * been validated in in6_update_ifa(). 590 */ 591 bzero(&pr0, sizeof(pr0)); 592 pr0.ndpr_ifp = ifp; 593 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 594 NULL); 595 if (pr0.ndpr_plen == 128) { 596 /* we don't need to install a host route. */ 597 goto aifaddr_out; 598 } 599 pr0.ndpr_prefix = ifra->ifra_addr; 600 /* apply the mask for safety. */ 601 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 602 &ifra->ifra_prefixmask.sin6_addr); 603 604 /* 605 * XXX: since we don't have an API to set prefix (not address) 606 * lifetimes, we just use the same lifetimes as addresses. 607 * The (temporarily) installed lifetimes can be overridden by 608 * later advertised RAs (when accept_rtadv is non 0), which is 609 * an intended behavior. 610 */ 611 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 612 pr0.ndpr_raf_auto = 613 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 614 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 615 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 616 617 /* add the prefix if not yet. */ 618 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 619 /* 620 * nd6_prelist_add will install the corresponding 621 * interface route. 622 */ 623 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 624 if (carp_attached) 625 (*carp_detach_p)(&ia->ia_ifa); 626 goto out; 627 } 628 } 629 630 /* relate the address to the prefix */ 631 if (ia->ia6_ndpr == NULL) { 632 ia->ia6_ndpr = pr; 633 pr->ndpr_addrcnt++; 634 635 /* 636 * If this is the first autoconf address from the 637 * prefix, create a temporary address as well 638 * (when required). 639 */ 640 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 641 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 642 int e; 643 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 644 log(LOG_NOTICE, "in6_control: failed " 645 "to create a temporary address, " 646 "errno=%d\n", e); 647 } 648 } 649 } 650 nd6_prefix_rele(pr); 651 652 /* 653 * this might affect the status of autoconfigured addresses, 654 * that is, this address might make other addresses detached. 655 */ 656 pfxlist_onlink_check(); 657 658 aifaddr_out: 659 /* 660 * Try to clear the flag when a new IPv6 address is added 661 * onto an IFDISABLED interface and it succeeds. 662 */ 663 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 664 struct in6_ndireq nd; 665 666 memset(&nd, 0, sizeof(nd)); 667 nd.ndi.flags = ND_IFINFO(ifp)->flags; 668 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 669 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 670 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 671 "SIOCSIFINFO_FLAGS for -ifdisabled " 672 "failed."); 673 /* 674 * Ignore failure of clearing the flag intentionally. 675 * The failure means address duplication was detected. 676 */ 677 } 678 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 679 break; 680 } 681 682 case SIOCDIFADDR_IN6: 683 { 684 struct nd_prefix *pr; 685 686 /* 687 * If the address being deleted is the only one that owns 688 * the corresponding prefix, expire the prefix as well. 689 * XXX: theoretically, we don't have to worry about such 690 * relationship, since we separate the address management 691 * and the prefix management. We do this, however, to provide 692 * as much backward compatibility as possible in terms of 693 * the ioctl operation. 694 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 695 */ 696 pr = ia->ia6_ndpr; 697 in6_purgeaddr(&ia->ia_ifa); 698 if (pr != NULL && pr->ndpr_addrcnt == 0) { 699 ND6_WLOCK(); 700 nd6_prefix_unlink(pr, NULL); 701 ND6_WUNLOCK(); 702 nd6_prefix_del(pr); 703 } 704 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 705 break; 706 } 707 708 default: 709 if (ifp->if_ioctl == NULL) { 710 error = EOPNOTSUPP; 711 goto out; 712 } 713 error = (*ifp->if_ioctl)(ifp, cmd, data); 714 goto out; 715 } 716 717 error = 0; 718 out: 719 if (ia != NULL) 720 ifa_free(&ia->ia_ifa); 721 return (error); 722 } 723 724 725 /* 726 * Join necessary multicast groups. Factored out from in6_update_ifa(). 727 * This entire work should only be done once, for the default FIB. 728 */ 729 static int 730 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 731 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 732 { 733 char ip6buf[INET6_ADDRSTRLEN]; 734 struct in6_addr mltaddr; 735 struct in6_multi_mship *imm; 736 int delay, error; 737 738 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 739 740 /* Join solicited multicast addr for new host id. */ 741 bzero(&mltaddr, sizeof(struct in6_addr)); 742 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 743 mltaddr.s6_addr32[2] = htonl(1); 744 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 745 mltaddr.s6_addr8[12] = 0xff; 746 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 747 /* XXX: should not happen */ 748 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 749 goto cleanup; 750 } 751 delay = error = 0; 752 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 753 /* 754 * We need a random delay for DAD on the address being 755 * configured. It also means delaying transmission of the 756 * corresponding MLD report to avoid report collision. 757 * [RFC 4861, Section 6.3.7] 758 */ 759 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 760 } 761 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 762 if (imm == NULL) { 763 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 764 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 765 if_name(ifp), error)); 766 goto cleanup; 767 } 768 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 769 *in6m_sol = imm->i6mm_maddr; 770 771 /* 772 * Join link-local all-nodes address. 773 */ 774 mltaddr = in6addr_linklocal_allnodes; 775 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 776 goto cleanup; /* XXX: should not fail */ 777 778 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 779 if (imm == NULL) { 780 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 781 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 782 if_name(ifp), error)); 783 goto cleanup; 784 } 785 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 786 787 /* 788 * Join node information group address. 789 */ 790 delay = 0; 791 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 792 /* 793 * The spec does not say anything about delay for this group, 794 * but the same logic should apply. 795 */ 796 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 797 } 798 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 799 /* XXX jinmei */ 800 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 801 if (imm == NULL) 802 nd6log((LOG_WARNING, 803 "%s: in6_joingroup failed for %s on %s " 804 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 805 &mltaddr), if_name(ifp), error)); 806 /* XXX not very fatal, go on... */ 807 else 808 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 809 } 810 if (V_icmp6_nodeinfo_oldmcprefix && 811 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 812 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 813 if (imm == NULL) 814 nd6log((LOG_WARNING, 815 "%s: in6_joingroup failed for %s on %s " 816 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 817 &mltaddr), if_name(ifp), error)); 818 /* XXX not very fatal, go on... */ 819 else 820 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 821 } 822 823 /* 824 * Join interface-local all-nodes address. 825 * (ff01::1%ifN, and ff01::%ifN/32) 826 */ 827 mltaddr = in6addr_nodelocal_allnodes; 828 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 829 goto cleanup; /* XXX: should not fail */ 830 831 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 832 if (imm == NULL) { 833 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 834 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 835 &mltaddr), if_name(ifp), error)); 836 goto cleanup; 837 } 838 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 839 840 cleanup: 841 return (error); 842 } 843 844 /* 845 * Update parameters of an IPv6 interface address. 846 * If necessary, a new entry is created and linked into address chains. 847 * This function is separated from in6_control(). 848 */ 849 int 850 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 851 struct in6_ifaddr *ia, int flags) 852 { 853 int error, hostIsNew = 0; 854 855 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 856 return (error); 857 858 if (ia == NULL) { 859 hostIsNew = 1; 860 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 861 return (ENOBUFS); 862 } 863 864 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 865 if (error != 0) { 866 if (hostIsNew != 0) { 867 in6_unlink_ifa(ia, ifp); 868 ifa_free(&ia->ia_ifa); 869 } 870 return (error); 871 } 872 873 if (hostIsNew) 874 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 875 876 return (error); 877 } 878 879 /* 880 * Fill in basic IPv6 address request info. 881 */ 882 void 883 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 884 const struct in6_addr *mask) 885 { 886 887 memset(ifra, 0, sizeof(struct in6_aliasreq)); 888 889 ifra->ifra_addr.sin6_family = AF_INET6; 890 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 891 if (addr != NULL) 892 ifra->ifra_addr.sin6_addr = *addr; 893 894 ifra->ifra_prefixmask.sin6_family = AF_INET6; 895 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 896 if (mask != NULL) 897 ifra->ifra_prefixmask.sin6_addr = *mask; 898 } 899 900 static int 901 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 902 struct in6_ifaddr *ia, int flags) 903 { 904 int plen = -1; 905 struct sockaddr_in6 dst6; 906 struct in6_addrlifetime *lt; 907 char ip6buf[INET6_ADDRSTRLEN]; 908 909 /* Validate parameters */ 910 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 911 return (EINVAL); 912 913 /* 914 * The destination address for a p2p link must have a family 915 * of AF_UNSPEC or AF_INET6. 916 */ 917 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 918 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 919 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 920 return (EAFNOSUPPORT); 921 922 /* 923 * Validate address 924 */ 925 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 926 ifra->ifra_addr.sin6_family != AF_INET6) 927 return (EINVAL); 928 929 /* 930 * validate ifra_prefixmask. don't check sin6_family, netmask 931 * does not carry fields other than sin6_len. 932 */ 933 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 934 return (EINVAL); 935 /* 936 * Because the IPv6 address architecture is classless, we require 937 * users to specify a (non 0) prefix length (mask) for a new address. 938 * We also require the prefix (when specified) mask is valid, and thus 939 * reject a non-consecutive mask. 940 */ 941 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 942 return (EINVAL); 943 if (ifra->ifra_prefixmask.sin6_len != 0) { 944 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 945 (u_char *)&ifra->ifra_prefixmask + 946 ifra->ifra_prefixmask.sin6_len); 947 if (plen <= 0) 948 return (EINVAL); 949 } else { 950 /* 951 * In this case, ia must not be NULL. We just use its prefix 952 * length. 953 */ 954 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 955 } 956 /* 957 * If the destination address on a p2p interface is specified, 958 * and the address is a scoped one, validate/set the scope 959 * zone identifier. 960 */ 961 dst6 = ifra->ifra_dstaddr; 962 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 963 (dst6.sin6_family == AF_INET6)) { 964 struct in6_addr in6_tmp; 965 u_int32_t zoneid; 966 967 in6_tmp = dst6.sin6_addr; 968 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 969 return (EINVAL); /* XXX: should be impossible */ 970 971 if (dst6.sin6_scope_id != 0) { 972 if (dst6.sin6_scope_id != zoneid) 973 return (EINVAL); 974 } else /* user omit to specify the ID. */ 975 dst6.sin6_scope_id = zoneid; 976 977 /* convert into the internal form */ 978 if (sa6_embedscope(&dst6, 0)) 979 return (EINVAL); /* XXX: should be impossible */ 980 } 981 /* Modify original ifra_dstaddr to reflect changes */ 982 ifra->ifra_dstaddr = dst6; 983 984 /* 985 * The destination address can be specified only for a p2p or a 986 * loopback interface. If specified, the corresponding prefix length 987 * must be 128. 988 */ 989 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 990 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 991 /* XXX: noisy message */ 992 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 993 "be specified for a p2p or a loopback IF only\n")); 994 return (EINVAL); 995 } 996 if (plen != 128) { 997 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 998 "be 128 when dstaddr is specified\n")); 999 return (EINVAL); 1000 } 1001 } 1002 /* lifetime consistency check */ 1003 lt = &ifra->ifra_lifetime; 1004 if (lt->ia6t_pltime > lt->ia6t_vltime) 1005 return (EINVAL); 1006 if (lt->ia6t_vltime == 0) { 1007 /* 1008 * the following log might be noisy, but this is a typical 1009 * configuration mistake or a tool's bug. 1010 */ 1011 nd6log((LOG_INFO, 1012 "in6_update_ifa: valid lifetime is 0 for %s\n", 1013 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1014 1015 if (ia == NULL) 1016 return (0); /* there's nothing to do */ 1017 } 1018 1019 /* Check prefix mask */ 1020 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1021 /* 1022 * We prohibit changing the prefix length of an existing 1023 * address, because 1024 * + such an operation should be rare in IPv6, and 1025 * + the operation would confuse prefix management. 1026 */ 1027 if (ia->ia_prefixmask.sin6_len != 0 && 1028 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1029 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1030 "of an existing %s address should not be changed\n", 1031 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1032 1033 return (EINVAL); 1034 } 1035 } 1036 1037 return (0); 1038 } 1039 1040 1041 /* 1042 * Allocate a new ifaddr and link it into chains. 1043 */ 1044 static struct in6_ifaddr * 1045 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1046 { 1047 struct in6_ifaddr *ia; 1048 1049 /* 1050 * When in6_alloc_ifa() is called in a process of a received 1051 * RA, it is called under an interrupt context. So, we should 1052 * call malloc with M_NOWAIT. 1053 */ 1054 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1055 if (ia == NULL) 1056 return (NULL); 1057 LIST_INIT(&ia->ia6_memberships); 1058 /* Initialize the address and masks, and put time stamp */ 1059 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1060 ia->ia_addr.sin6_family = AF_INET6; 1061 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1062 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1063 ia->ia_addr = ifra->ifra_addr; 1064 ia->ia6_createtime = time_uptime; 1065 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1066 /* 1067 * Some functions expect that ifa_dstaddr is not 1068 * NULL for p2p interfaces. 1069 */ 1070 ia->ia_ifa.ifa_dstaddr = 1071 (struct sockaddr *)&ia->ia_dstaddr; 1072 } else { 1073 ia->ia_ifa.ifa_dstaddr = NULL; 1074 } 1075 1076 /* set prefix mask if any */ 1077 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1078 if (ifra->ifra_prefixmask.sin6_len != 0) { 1079 ia->ia_prefixmask.sin6_family = AF_INET6; 1080 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1081 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1082 } 1083 1084 ia->ia_ifp = ifp; 1085 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1086 IF_ADDR_WLOCK(ifp); 1087 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1088 IF_ADDR_WUNLOCK(ifp); 1089 1090 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1091 IN6_IFADDR_WLOCK(); 1092 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1093 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1094 IN6_IFADDR_WUNLOCK(); 1095 1096 return (ia); 1097 } 1098 1099 /* 1100 * Update/configure interface address parameters: 1101 * 1102 * 1) Update lifetime 1103 * 2) Update interface metric ad flags 1104 * 3) Notify other subsystems 1105 */ 1106 static int 1107 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1108 struct in6_ifaddr *ia, int hostIsNew, int flags) 1109 { 1110 int error; 1111 1112 /* update timestamp */ 1113 ia->ia6_updatetime = time_uptime; 1114 1115 /* 1116 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1117 * to see if the address is deprecated or invalidated, but initialize 1118 * these members for applications. 1119 */ 1120 ia->ia6_lifetime = ifra->ifra_lifetime; 1121 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1122 ia->ia6_lifetime.ia6t_expire = 1123 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1124 } else 1125 ia->ia6_lifetime.ia6t_expire = 0; 1126 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1127 ia->ia6_lifetime.ia6t_preferred = 1128 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1129 } else 1130 ia->ia6_lifetime.ia6t_preferred = 0; 1131 1132 /* 1133 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1134 * userland, make it deprecated. 1135 */ 1136 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1137 ia->ia6_lifetime.ia6t_pltime = 0; 1138 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1139 } 1140 1141 /* 1142 * configure address flags. 1143 */ 1144 ia->ia6_flags = ifra->ifra_flags; 1145 1146 /* 1147 * Make the address tentative before joining multicast addresses, 1148 * so that corresponding MLD responses would not have a tentative 1149 * source address. 1150 */ 1151 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1152 1153 /* 1154 * DAD should be performed for an new address or addresses on 1155 * an interface with ND6_IFF_IFDISABLED. 1156 */ 1157 if (in6if_do_dad(ifp) && 1158 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1159 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1160 1161 /* notify other subsystems */ 1162 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1163 1164 return (error); 1165 } 1166 1167 /* 1168 * Do link-level ifa job: 1169 * 1) Add lle entry for added address 1170 * 2) Notifies routing socket users about new address 1171 * 3) join appropriate multicast group 1172 * 4) start DAD if enabled 1173 */ 1174 static int 1175 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1176 struct in6_ifaddr *ia, int flags) 1177 { 1178 struct in6_multi *in6m_sol; 1179 int error = 0; 1180 1181 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1182 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1183 in6_purgeaddr(&ia->ia_ifa); 1184 ifa_free(&ia->ia_ifa); 1185 return (error); 1186 } 1187 1188 /* Join necessary multicast groups. */ 1189 in6m_sol = NULL; 1190 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1191 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1192 if (error != 0) { 1193 in6_purgeaddr(&ia->ia_ifa); 1194 ifa_free(&ia->ia_ifa); 1195 return (error); 1196 } 1197 } 1198 1199 /* Perform DAD, if the address is TENTATIVE. */ 1200 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1201 int delay, mindelay, maxdelay; 1202 1203 delay = 0; 1204 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1205 /* 1206 * We need to impose a delay before sending an NS 1207 * for DAD. Check if we also needed a delay for the 1208 * corresponding MLD message. If we did, the delay 1209 * should be larger than the MLD delay (this could be 1210 * relaxed a bit, but this simple logic is at least 1211 * safe). 1212 * XXX: Break data hiding guidelines and look at 1213 * state for the solicited multicast group. 1214 */ 1215 mindelay = 0; 1216 if (in6m_sol != NULL && 1217 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1218 mindelay = in6m_sol->in6m_timer; 1219 } 1220 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1221 if (maxdelay - mindelay == 0) 1222 delay = 0; 1223 else { 1224 delay = 1225 (arc4random() % (maxdelay - mindelay)) + 1226 mindelay; 1227 } 1228 } 1229 nd6_dad_start((struct ifaddr *)ia, delay); 1230 } 1231 1232 in6_newaddrmsg(ia, RTM_ADD); 1233 ifa_free(&ia->ia_ifa); 1234 return (error); 1235 } 1236 1237 void 1238 in6_purgeaddr(struct ifaddr *ifa) 1239 { 1240 struct ifnet *ifp = ifa->ifa_ifp; 1241 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1242 struct in6_multi_mship *imm; 1243 int plen, error; 1244 1245 if (ifa->ifa_carp) 1246 (*carp_detach_p)(ifa); 1247 1248 /* 1249 * Remove the loopback route to the interface address. 1250 * The check for the current setting of "nd6_useloopback" 1251 * is not needed. 1252 */ 1253 if (ia->ia_flags & IFA_RTSELF) { 1254 error = ifa_del_loopback_route((struct ifaddr *)ia, 1255 (struct sockaddr *)&ia->ia_addr); 1256 if (error == 0) 1257 ia->ia_flags &= ~IFA_RTSELF; 1258 } 1259 1260 /* stop DAD processing */ 1261 nd6_dad_stop(ifa); 1262 1263 /* Leave multicast groups. */ 1264 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1265 LIST_REMOVE(imm, i6mm_chain); 1266 in6_leavegroup(imm); 1267 } 1268 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1269 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1270 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1271 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1272 if (error != 0) 1273 log(LOG_INFO, "%s: err=%d, destination address delete " 1274 "failed\n", __func__, error); 1275 ia->ia_flags &= ~IFA_ROUTE; 1276 } 1277 1278 in6_newaddrmsg(ia, RTM_DELETE); 1279 in6_unlink_ifa(ia, ifp); 1280 } 1281 1282 static void 1283 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1284 { 1285 char ip6buf[INET6_ADDRSTRLEN]; 1286 int remove_lle; 1287 1288 IF_ADDR_WLOCK(ifp); 1289 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1290 IF_ADDR_WUNLOCK(ifp); 1291 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1292 1293 /* 1294 * Defer the release of what might be the last reference to the 1295 * in6_ifaddr so that it can't be freed before the remainder of the 1296 * cleanup. 1297 */ 1298 IN6_IFADDR_WLOCK(); 1299 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1300 LIST_REMOVE(ia, ia6_hash); 1301 IN6_IFADDR_WUNLOCK(); 1302 1303 /* 1304 * Release the reference to the base prefix. There should be a 1305 * positive reference. 1306 */ 1307 remove_lle = 0; 1308 if (ia->ia6_ndpr == NULL) { 1309 nd6log((LOG_NOTICE, 1310 "in6_unlink_ifa: autoconf'ed address " 1311 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1312 } else { 1313 ia->ia6_ndpr->ndpr_addrcnt--; 1314 /* Do not delete lles within prefix if refcont != 0 */ 1315 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1316 remove_lle = 1; 1317 ia->ia6_ndpr = NULL; 1318 } 1319 1320 nd6_rem_ifa_lle(ia, remove_lle); 1321 1322 /* 1323 * Also, if the address being removed is autoconf'ed, call 1324 * pfxlist_onlink_check() since the release might affect the status of 1325 * other (detached) addresses. 1326 */ 1327 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1328 pfxlist_onlink_check(); 1329 } 1330 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1331 } 1332 1333 /* 1334 * Notifies other subsystems about address change/arrival: 1335 * 1) Notifies device handler on the first IPv6 address assignment 1336 * 2) Handle routing table changes for P2P links and route 1337 * 3) Handle routing table changes for address host route 1338 */ 1339 static int 1340 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1341 struct in6_aliasreq *ifra, int hostIsNew) 1342 { 1343 int error = 0, plen, ifacount = 0; 1344 struct ifaddr *ifa; 1345 struct sockaddr_in6 *pdst; 1346 char ip6buf[INET6_ADDRSTRLEN]; 1347 1348 /* 1349 * Give the interface a chance to initialize 1350 * if this is its first address, 1351 */ 1352 if (hostIsNew != 0) { 1353 IF_ADDR_RLOCK(ifp); 1354 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1355 if (ifa->ifa_addr->sa_family != AF_INET6) 1356 continue; 1357 ifacount++; 1358 } 1359 IF_ADDR_RUNLOCK(ifp); 1360 } 1361 1362 if (ifacount <= 1 && ifp->if_ioctl) { 1363 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1364 if (error) 1365 return (error); 1366 } 1367 1368 /* 1369 * If a new destination address is specified, scrub the old one and 1370 * install the new destination. Note that the interface must be 1371 * p2p or loopback. 1372 */ 1373 pdst = &ifra->ifra_dstaddr; 1374 if (pdst->sin6_family == AF_INET6 && 1375 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1376 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1377 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1378 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1379 "remove a route to the old destination: %s\n", 1380 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1381 /* proceed anyway... */ 1382 } else 1383 ia->ia_flags &= ~IFA_ROUTE; 1384 ia->ia_dstaddr = *pdst; 1385 } 1386 1387 /* 1388 * If a new destination address is specified for a point-to-point 1389 * interface, install a route to the destination as an interface 1390 * direct route. 1391 * XXX: the logic below rejects assigning multiple addresses on a p2p 1392 * interface that share the same destination. 1393 */ 1394 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1395 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1396 ia->ia_dstaddr.sin6_family == AF_INET6) { 1397 int rtflags = RTF_UP | RTF_HOST; 1398 /* 1399 * Handle the case for ::1 . 1400 */ 1401 if (ifp->if_flags & IFF_LOOPBACK) 1402 ia->ia_flags |= IFA_RTSELF; 1403 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1404 if (error) 1405 return (error); 1406 ia->ia_flags |= IFA_ROUTE; 1407 } 1408 1409 /* 1410 * add a loopback route to self if not exists 1411 */ 1412 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1413 error = ifa_add_loopback_route((struct ifaddr *)ia, 1414 (struct sockaddr *)&ia->ia_addr); 1415 if (error == 0) 1416 ia->ia_flags |= IFA_RTSELF; 1417 } 1418 1419 return (error); 1420 } 1421 1422 /* 1423 * Find an IPv6 interface link-local address specific to an interface. 1424 * ifaddr is returned referenced. 1425 */ 1426 struct in6_ifaddr * 1427 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1428 { 1429 struct ifaddr *ifa; 1430 1431 IF_ADDR_RLOCK(ifp); 1432 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1433 if (ifa->ifa_addr->sa_family != AF_INET6) 1434 continue; 1435 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1436 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1437 ignoreflags) != 0) 1438 continue; 1439 ifa_ref(ifa); 1440 break; 1441 } 1442 } 1443 IF_ADDR_RUNLOCK(ifp); 1444 1445 return ((struct in6_ifaddr *)ifa); 1446 } 1447 1448 1449 /* 1450 * find the internet address corresponding to a given address. 1451 * ifaddr is returned referenced. 1452 */ 1453 struct in6_ifaddr * 1454 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1455 { 1456 struct rm_priotracker in6_ifa_tracker; 1457 struct in6_ifaddr *ia; 1458 1459 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1460 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1461 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1462 if (zoneid != 0 && 1463 zoneid != ia->ia_addr.sin6_scope_id) 1464 continue; 1465 ifa_ref(&ia->ia_ifa); 1466 break; 1467 } 1468 } 1469 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1470 return (ia); 1471 } 1472 1473 /* 1474 * find the internet address corresponding to a given interface and address. 1475 * ifaddr is returned referenced. 1476 */ 1477 struct in6_ifaddr * 1478 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1479 { 1480 struct ifaddr *ifa; 1481 1482 IF_ADDR_RLOCK(ifp); 1483 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1484 if (ifa->ifa_addr->sa_family != AF_INET6) 1485 continue; 1486 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1487 ifa_ref(ifa); 1488 break; 1489 } 1490 } 1491 IF_ADDR_RUNLOCK(ifp); 1492 1493 return ((struct in6_ifaddr *)ifa); 1494 } 1495 1496 /* 1497 * Find a link-local scoped address on ifp and return it if any. 1498 */ 1499 struct in6_ifaddr * 1500 in6ifa_llaonifp(struct ifnet *ifp) 1501 { 1502 struct sockaddr_in6 *sin6; 1503 struct ifaddr *ifa; 1504 1505 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1506 return (NULL); 1507 IF_ADDR_RLOCK(ifp); 1508 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1509 if (ifa->ifa_addr->sa_family != AF_INET6) 1510 continue; 1511 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1512 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1513 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1514 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1515 break; 1516 } 1517 IF_ADDR_RUNLOCK(ifp); 1518 1519 return ((struct in6_ifaddr *)ifa); 1520 } 1521 1522 /* 1523 * Convert IP6 address to printable (loggable) representation. Caller 1524 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1525 */ 1526 static char digits[] = "0123456789abcdef"; 1527 char * 1528 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1529 { 1530 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1531 char *cp; 1532 const u_int16_t *a = (const u_int16_t *)addr; 1533 const u_int8_t *d; 1534 int dcolon = 0, zero = 0; 1535 1536 cp = ip6buf; 1537 1538 for (i = 0; i < 8; i++) { 1539 if (*(a + i) == 0) { 1540 cnt++; 1541 if (cnt == 1) 1542 idx = i; 1543 } 1544 else if (maxcnt < cnt) { 1545 maxcnt = cnt; 1546 index = idx; 1547 cnt = 0; 1548 } 1549 } 1550 if (maxcnt < cnt) { 1551 maxcnt = cnt; 1552 index = idx; 1553 } 1554 1555 for (i = 0; i < 8; i++) { 1556 if (dcolon == 1) { 1557 if (*a == 0) { 1558 if (i == 7) 1559 *cp++ = ':'; 1560 a++; 1561 continue; 1562 } else 1563 dcolon = 2; 1564 } 1565 if (*a == 0) { 1566 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1567 if (i == 0) 1568 *cp++ = ':'; 1569 *cp++ = ':'; 1570 dcolon = 1; 1571 } else { 1572 *cp++ = '0'; 1573 *cp++ = ':'; 1574 } 1575 a++; 1576 continue; 1577 } 1578 d = (const u_char *)a; 1579 /* Try to eliminate leading zeros in printout like in :0001. */ 1580 zero = 1; 1581 *cp = digits[*d >> 4]; 1582 if (*cp != '0') { 1583 zero = 0; 1584 cp++; 1585 } 1586 *cp = digits[*d++ & 0xf]; 1587 if (zero == 0 || (*cp != '0')) { 1588 zero = 0; 1589 cp++; 1590 } 1591 *cp = digits[*d >> 4]; 1592 if (zero == 0 || (*cp != '0')) { 1593 zero = 0; 1594 cp++; 1595 } 1596 *cp++ = digits[*d & 0xf]; 1597 *cp++ = ':'; 1598 a++; 1599 } 1600 *--cp = '\0'; 1601 return (ip6buf); 1602 } 1603 1604 int 1605 in6_localaddr(struct in6_addr *in6) 1606 { 1607 struct rm_priotracker in6_ifa_tracker; 1608 struct in6_ifaddr *ia; 1609 1610 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1611 return 1; 1612 1613 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1614 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1615 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1616 &ia->ia_prefixmask.sin6_addr)) { 1617 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1618 return 1; 1619 } 1620 } 1621 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1622 1623 return (0); 1624 } 1625 1626 /* 1627 * Return 1 if an internet address is for the local host and configured 1628 * on one of its interfaces. 1629 */ 1630 int 1631 in6_localip(struct in6_addr *in6) 1632 { 1633 struct rm_priotracker in6_ifa_tracker; 1634 struct in6_ifaddr *ia; 1635 1636 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1637 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1638 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1639 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1640 return (1); 1641 } 1642 } 1643 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1644 return (0); 1645 } 1646 1647 /* 1648 * Return 1 if an internet address is configured on an interface. 1649 */ 1650 int 1651 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1652 { 1653 struct in6_addr in6; 1654 struct ifaddr *ifa; 1655 struct in6_ifaddr *ia6; 1656 1657 in6 = *addr; 1658 if (in6_clearscope(&in6)) 1659 return (0); 1660 in6_setscope(&in6, ifp, NULL); 1661 1662 IF_ADDR_RLOCK(ifp); 1663 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1664 if (ifa->ifa_addr->sa_family != AF_INET6) 1665 continue; 1666 ia6 = (struct in6_ifaddr *)ifa; 1667 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1668 IF_ADDR_RUNLOCK(ifp); 1669 return (1); 1670 } 1671 } 1672 IF_ADDR_RUNLOCK(ifp); 1673 1674 return (0); 1675 } 1676 1677 int 1678 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1679 { 1680 struct rm_priotracker in6_ifa_tracker; 1681 struct in6_ifaddr *ia; 1682 1683 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1684 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1685 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1686 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1687 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1688 return (1); /* true */ 1689 } 1690 break; 1691 } 1692 } 1693 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1694 1695 return (0); /* false */ 1696 } 1697 1698 /* 1699 * return length of part which dst and src are equal 1700 * hard coding... 1701 */ 1702 int 1703 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1704 { 1705 int match = 0; 1706 u_char *s = (u_char *)src, *d = (u_char *)dst; 1707 u_char *lim = s + 16, r; 1708 1709 while (s < lim) 1710 if ((r = (*d++ ^ *s++)) != 0) { 1711 while (r < 128) { 1712 match++; 1713 r <<= 1; 1714 } 1715 break; 1716 } else 1717 match += 8; 1718 return match; 1719 } 1720 1721 /* XXX: to be scope conscious */ 1722 int 1723 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1724 { 1725 int bytelen, bitlen; 1726 1727 /* sanity check */ 1728 if (0 > len || len > 128) { 1729 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1730 len); 1731 return (0); 1732 } 1733 1734 bytelen = len / 8; 1735 bitlen = len % 8; 1736 1737 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1738 return (0); 1739 if (bitlen != 0 && 1740 p1->s6_addr[bytelen] >> (8 - bitlen) != 1741 p2->s6_addr[bytelen] >> (8 - bitlen)) 1742 return (0); 1743 1744 return (1); 1745 } 1746 1747 void 1748 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1749 { 1750 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1751 int bytelen, bitlen, i; 1752 1753 /* sanity check */ 1754 if (0 > len || len > 128) { 1755 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1756 len); 1757 return; 1758 } 1759 1760 bzero(maskp, sizeof(*maskp)); 1761 bytelen = len / 8; 1762 bitlen = len % 8; 1763 for (i = 0; i < bytelen; i++) 1764 maskp->s6_addr[i] = 0xff; 1765 if (bitlen) 1766 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1767 } 1768 1769 /* 1770 * return the best address out of the same scope. if no address was 1771 * found, return the first valid address from designated IF. 1772 */ 1773 struct in6_ifaddr * 1774 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1775 { 1776 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1777 struct ifaddr *ifa; 1778 struct in6_ifaddr *besta = NULL; 1779 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1780 1781 dep[0] = dep[1] = NULL; 1782 1783 /* 1784 * We first look for addresses in the same scope. 1785 * If there is one, return it. 1786 * If two or more, return one which matches the dst longest. 1787 * If none, return one of global addresses assigned other ifs. 1788 */ 1789 IF_ADDR_RLOCK(ifp); 1790 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1791 if (ifa->ifa_addr->sa_family != AF_INET6) 1792 continue; 1793 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1794 continue; /* XXX: is there any case to allow anycast? */ 1795 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1796 continue; /* don't use this interface */ 1797 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1798 continue; 1799 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1800 if (V_ip6_use_deprecated) 1801 dep[0] = (struct in6_ifaddr *)ifa; 1802 continue; 1803 } 1804 1805 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1806 /* 1807 * call in6_matchlen() as few as possible 1808 */ 1809 if (besta) { 1810 if (blen == -1) 1811 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1812 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1813 if (tlen > blen) { 1814 blen = tlen; 1815 besta = (struct in6_ifaddr *)ifa; 1816 } 1817 } else 1818 besta = (struct in6_ifaddr *)ifa; 1819 } 1820 } 1821 if (besta) { 1822 ifa_ref(&besta->ia_ifa); 1823 IF_ADDR_RUNLOCK(ifp); 1824 return (besta); 1825 } 1826 1827 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1828 if (ifa->ifa_addr->sa_family != AF_INET6) 1829 continue; 1830 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1831 continue; /* XXX: is there any case to allow anycast? */ 1832 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1833 continue; /* don't use this interface */ 1834 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1835 continue; 1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1837 if (V_ip6_use_deprecated) 1838 dep[1] = (struct in6_ifaddr *)ifa; 1839 continue; 1840 } 1841 1842 if (ifa != NULL) 1843 ifa_ref(ifa); 1844 IF_ADDR_RUNLOCK(ifp); 1845 return (struct in6_ifaddr *)ifa; 1846 } 1847 1848 /* use the last-resort values, that are, deprecated addresses */ 1849 if (dep[0]) { 1850 ifa_ref((struct ifaddr *)dep[0]); 1851 IF_ADDR_RUNLOCK(ifp); 1852 return dep[0]; 1853 } 1854 if (dep[1]) { 1855 ifa_ref((struct ifaddr *)dep[1]); 1856 IF_ADDR_RUNLOCK(ifp); 1857 return dep[1]; 1858 } 1859 1860 IF_ADDR_RUNLOCK(ifp); 1861 return NULL; 1862 } 1863 1864 /* 1865 * perform DAD when interface becomes IFF_UP. 1866 */ 1867 void 1868 in6_if_up(struct ifnet *ifp) 1869 { 1870 struct ifaddr *ifa; 1871 struct in6_ifaddr *ia; 1872 1873 IF_ADDR_RLOCK(ifp); 1874 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1875 if (ifa->ifa_addr->sa_family != AF_INET6) 1876 continue; 1877 ia = (struct in6_ifaddr *)ifa; 1878 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1879 /* 1880 * The TENTATIVE flag was likely set by hand 1881 * beforehand, implicitly indicating the need for DAD. 1882 * We may be able to skip the random delay in this 1883 * case, but we impose delays just in case. 1884 */ 1885 nd6_dad_start(ifa, 1886 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1887 } 1888 } 1889 IF_ADDR_RUNLOCK(ifp); 1890 1891 /* 1892 * special cases, like 6to4, are handled in in6_ifattach 1893 */ 1894 in6_ifattach(ifp, NULL); 1895 } 1896 1897 int 1898 in6if_do_dad(struct ifnet *ifp) 1899 { 1900 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1901 return (0); 1902 1903 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1904 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1905 return (0); 1906 1907 /* 1908 * Our DAD routine requires the interface up and running. 1909 * However, some interfaces can be up before the RUNNING 1910 * status. Additionally, users may try to assign addresses 1911 * before the interface becomes up (or running). 1912 * This function returns EAGAIN in that case. 1913 * The caller should mark "tentative" on the address instead of 1914 * performing DAD immediately. 1915 */ 1916 if (!((ifp->if_flags & IFF_UP) && 1917 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1918 return (EAGAIN); 1919 1920 return (1); 1921 } 1922 1923 /* 1924 * Calculate max IPv6 MTU through all the interfaces and store it 1925 * to in6_maxmtu. 1926 */ 1927 void 1928 in6_setmaxmtu(void) 1929 { 1930 unsigned long maxmtu = 0; 1931 struct ifnet *ifp; 1932 1933 IFNET_RLOCK_NOSLEEP(); 1934 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1935 /* this function can be called during ifnet initialization */ 1936 if (!ifp->if_afdata[AF_INET6]) 1937 continue; 1938 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1939 IN6_LINKMTU(ifp) > maxmtu) 1940 maxmtu = IN6_LINKMTU(ifp); 1941 } 1942 IFNET_RUNLOCK_NOSLEEP(); 1943 if (maxmtu) /* update only when maxmtu is positive */ 1944 V_in6_maxmtu = maxmtu; 1945 } 1946 1947 /* 1948 * Provide the length of interface identifiers to be used for the link attached 1949 * to the given interface. The length should be defined in "IPv6 over 1950 * xxx-link" document. Note that address architecture might also define 1951 * the length for a particular set of address prefixes, regardless of the 1952 * link type. As clarified in rfc2462bis, those two definitions should be 1953 * consistent, and those really are as of August 2004. 1954 */ 1955 int 1956 in6_if2idlen(struct ifnet *ifp) 1957 { 1958 switch (ifp->if_type) { 1959 case IFT_ETHER: /* RFC2464 */ 1960 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 1961 case IFT_L2VLAN: /* ditto */ 1962 case IFT_IEEE80211: /* ditto */ 1963 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 1964 case IFT_INFINIBAND: 1965 return (64); 1966 case IFT_FDDI: /* RFC2467 */ 1967 return (64); 1968 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 1969 return (64); 1970 case IFT_PPP: /* RFC2472 */ 1971 return (64); 1972 case IFT_ARCNET: /* RFC2497 */ 1973 return (64); 1974 case IFT_FRELAY: /* RFC2590 */ 1975 return (64); 1976 case IFT_IEEE1394: /* RFC3146 */ 1977 return (64); 1978 case IFT_GIF: 1979 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 1980 case IFT_LOOP: 1981 return (64); /* XXX: is this really correct? */ 1982 default: 1983 /* 1984 * Unknown link type: 1985 * It might be controversial to use the today's common constant 1986 * of 64 for these cases unconditionally. For full compliance, 1987 * we should return an error in this case. On the other hand, 1988 * if we simply miss the standard for the link type or a new 1989 * standard is defined for a new link type, the IFID length 1990 * is very likely to be the common constant. As a compromise, 1991 * we always use the constant, but make an explicit notice 1992 * indicating the "unknown" case. 1993 */ 1994 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 1995 return (64); 1996 } 1997 } 1998 1999 #include <sys/sysctl.h> 2000 2001 struct in6_llentry { 2002 struct llentry base; 2003 }; 2004 2005 #define IN6_LLTBL_DEFAULT_HSIZE 32 2006 #define IN6_LLTBL_HASH(k, h) \ 2007 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2008 2009 /* 2010 * Do actual deallocation of @lle. 2011 */ 2012 static void 2013 in6_lltable_destroy_lle_unlocked(struct llentry *lle) 2014 { 2015 2016 LLE_LOCK_DESTROY(lle); 2017 LLE_REQ_DESTROY(lle); 2018 free(lle, M_LLTABLE); 2019 } 2020 2021 /* 2022 * Called by LLE_FREE_LOCKED when number of references 2023 * drops to zero. 2024 */ 2025 static void 2026 in6_lltable_destroy_lle(struct llentry *lle) 2027 { 2028 2029 LLE_WUNLOCK(lle); 2030 in6_lltable_destroy_lle_unlocked(lle); 2031 } 2032 2033 static struct llentry * 2034 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2035 { 2036 struct in6_llentry *lle; 2037 2038 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2039 if (lle == NULL) /* NB: caller generates msg */ 2040 return NULL; 2041 2042 lle->base.r_l3addr.addr6 = *addr6; 2043 lle->base.lle_refcnt = 1; 2044 lle->base.lle_free = in6_lltable_destroy_lle; 2045 LLE_LOCK_INIT(&lle->base); 2046 LLE_REQ_INIT(&lle->base); 2047 callout_init(&lle->base.lle_timer, 1); 2048 2049 return (&lle->base); 2050 } 2051 2052 static int 2053 in6_lltable_match_prefix(const struct sockaddr *saddr, 2054 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2055 { 2056 const struct in6_addr *addr, *mask, *lle_addr; 2057 2058 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2059 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2060 lle_addr = &lle->r_l3addr.addr6; 2061 2062 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2063 return (0); 2064 2065 if (lle->la_flags & LLE_IFADDR) { 2066 2067 /* 2068 * Delete LLE_IFADDR records IFF address & flag matches. 2069 * Note that addr is the interface address within prefix 2070 * being matched. 2071 */ 2072 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2073 (flags & LLE_STATIC) != 0) 2074 return (1); 2075 return (0); 2076 } 2077 2078 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2079 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2080 return (1); 2081 2082 return (0); 2083 } 2084 2085 static void 2086 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2087 { 2088 struct ifnet *ifp; 2089 2090 LLE_WLOCK_ASSERT(lle); 2091 KASSERT(llt != NULL, ("lltable is NULL")); 2092 2093 /* Unlink entry from table */ 2094 if ((lle->la_flags & LLE_LINKED) != 0) { 2095 2096 ifp = llt->llt_ifp; 2097 IF_AFDATA_WLOCK_ASSERT(ifp); 2098 lltable_unlink_entry(llt, lle); 2099 } 2100 2101 if (callout_stop(&lle->lle_timer) > 0) 2102 LLE_REMREF(lle); 2103 2104 llentry_free(lle); 2105 } 2106 2107 static int 2108 in6_lltable_rtcheck(struct ifnet *ifp, 2109 u_int flags, 2110 const struct sockaddr *l3addr) 2111 { 2112 const struct sockaddr_in6 *sin6; 2113 struct nhop6_basic nh6; 2114 struct in6_addr dst; 2115 uint32_t scopeid; 2116 int error; 2117 char ip6buf[INET6_ADDRSTRLEN]; 2118 2119 KASSERT(l3addr->sa_family == AF_INET6, 2120 ("sin_family %d", l3addr->sa_family)); 2121 2122 /* Our local addresses are always only installed on the default FIB. */ 2123 2124 sin6 = (const struct sockaddr_in6 *)l3addr; 2125 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2126 error = fib6_lookup_nh_basic(RT_DEFAULT_FIB, &dst, scopeid, 0, 0, &nh6); 2127 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2128 struct ifaddr *ifa; 2129 /* 2130 * Create an ND6 cache for an IPv6 neighbor 2131 * that is not covered by our own prefix. 2132 */ 2133 ifa = ifaof_ifpforaddr(l3addr, ifp); 2134 if (ifa != NULL) { 2135 ifa_free(ifa); 2136 return 0; 2137 } 2138 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2139 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2140 return EINVAL; 2141 } 2142 return 0; 2143 } 2144 2145 static inline uint32_t 2146 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2147 { 2148 2149 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2150 } 2151 2152 static uint32_t 2153 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2154 { 2155 2156 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2157 } 2158 2159 static void 2160 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2161 { 2162 struct sockaddr_in6 *sin6; 2163 2164 sin6 = (struct sockaddr_in6 *)sa; 2165 bzero(sin6, sizeof(*sin6)); 2166 sin6->sin6_family = AF_INET6; 2167 sin6->sin6_len = sizeof(*sin6); 2168 sin6->sin6_addr = lle->r_l3addr.addr6; 2169 } 2170 2171 static inline struct llentry * 2172 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2173 { 2174 struct llentry *lle; 2175 struct llentries *lleh; 2176 u_int hashidx; 2177 2178 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2179 lleh = &llt->lle_head[hashidx]; 2180 LIST_FOREACH(lle, lleh, lle_next) { 2181 if (lle->la_flags & LLE_DELETED) 2182 continue; 2183 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2184 break; 2185 } 2186 2187 return (lle); 2188 } 2189 2190 static void 2191 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2192 { 2193 2194 lle->la_flags |= LLE_DELETED; 2195 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2196 #ifdef DIAGNOSTIC 2197 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2198 #endif 2199 llentry_free(lle); 2200 } 2201 2202 static struct llentry * 2203 in6_lltable_alloc(struct lltable *llt, u_int flags, 2204 const struct sockaddr *l3addr) 2205 { 2206 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2207 struct ifnet *ifp = llt->llt_ifp; 2208 struct llentry *lle; 2209 char linkhdr[LLE_MAX_LINKHDR]; 2210 size_t linkhdrsize; 2211 int lladdr_off; 2212 2213 KASSERT(l3addr->sa_family == AF_INET6, 2214 ("sin_family %d", l3addr->sa_family)); 2215 2216 /* 2217 * A route that covers the given address must have 2218 * been installed 1st because we are doing a resolution, 2219 * verify this. 2220 */ 2221 if (!(flags & LLE_IFADDR) && 2222 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2223 return (NULL); 2224 2225 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2226 if (lle == NULL) { 2227 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2228 return (NULL); 2229 } 2230 lle->la_flags = flags; 2231 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2232 linkhdrsize = LLE_MAX_LINKHDR; 2233 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2234 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2235 in6_lltable_destroy_lle_unlocked(lle); 2236 return (NULL); 2237 } 2238 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2239 lladdr_off); 2240 lle->la_flags |= LLE_STATIC; 2241 } 2242 2243 if ((lle->la_flags & LLE_STATIC) != 0) 2244 lle->ln_state = ND6_LLINFO_REACHABLE; 2245 2246 return (lle); 2247 } 2248 2249 static struct llentry * 2250 in6_lltable_lookup(struct lltable *llt, u_int flags, 2251 const struct sockaddr *l3addr) 2252 { 2253 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2254 struct llentry *lle; 2255 2256 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2257 KASSERT(l3addr->sa_family == AF_INET6, 2258 ("sin_family %d", l3addr->sa_family)); 2259 2260 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2261 2262 if (lle == NULL) 2263 return (NULL); 2264 2265 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) != 2266 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X", 2267 flags)); 2268 2269 if (flags & LLE_UNLOCKED) 2270 return (lle); 2271 2272 if (flags & LLE_EXCLUSIVE) 2273 LLE_WLOCK(lle); 2274 else 2275 LLE_RLOCK(lle); 2276 return (lle); 2277 } 2278 2279 static int 2280 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2281 struct sysctl_req *wr) 2282 { 2283 struct ifnet *ifp = llt->llt_ifp; 2284 /* XXX stack use */ 2285 struct { 2286 struct rt_msghdr rtm; 2287 struct sockaddr_in6 sin6; 2288 /* 2289 * ndp.c assumes that sdl is word aligned 2290 */ 2291 #ifdef __LP64__ 2292 uint32_t pad; 2293 #endif 2294 struct sockaddr_dl sdl; 2295 } ndpc; 2296 struct sockaddr_dl *sdl; 2297 int error; 2298 2299 bzero(&ndpc, sizeof(ndpc)); 2300 /* skip deleted entries */ 2301 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2302 return (0); 2303 /* Skip if jailed and not a valid IP of the prison. */ 2304 lltable_fill_sa_entry(lle, 2305 (struct sockaddr *)&ndpc.sin6); 2306 if (prison_if(wr->td->td_ucred, 2307 (struct sockaddr *)&ndpc.sin6) != 0) 2308 return (0); 2309 /* 2310 * produce a msg made of: 2311 * struct rt_msghdr; 2312 * struct sockaddr_in6 (IPv6) 2313 * struct sockaddr_dl; 2314 */ 2315 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2316 ndpc.rtm.rtm_version = RTM_VERSION; 2317 ndpc.rtm.rtm_type = RTM_GET; 2318 ndpc.rtm.rtm_flags = RTF_UP; 2319 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2320 if (V_deembed_scopeid) 2321 sa6_recoverscope(&ndpc.sin6); 2322 2323 /* publish */ 2324 if (lle->la_flags & LLE_PUB) 2325 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2326 2327 sdl = &ndpc.sdl; 2328 sdl->sdl_family = AF_LINK; 2329 sdl->sdl_len = sizeof(*sdl); 2330 sdl->sdl_index = ifp->if_index; 2331 sdl->sdl_type = ifp->if_type; 2332 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2333 sdl->sdl_alen = ifp->if_addrlen; 2334 bcopy(lle->ll_addr, LLADDR(sdl), 2335 ifp->if_addrlen); 2336 } else { 2337 sdl->sdl_alen = 0; 2338 bzero(LLADDR(sdl), ifp->if_addrlen); 2339 } 2340 if (lle->la_expire != 0) 2341 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2342 lle->lle_remtime / hz + 2343 time_second - time_uptime; 2344 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2345 if (lle->la_flags & LLE_STATIC) 2346 ndpc.rtm.rtm_flags |= RTF_STATIC; 2347 if (lle->la_flags & LLE_IFADDR) 2348 ndpc.rtm.rtm_flags |= RTF_PINNED; 2349 if (lle->ln_router != 0) 2350 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2351 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2352 /* Store state in rmx_weight value */ 2353 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2354 ndpc.rtm.rtm_index = ifp->if_index; 2355 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2356 2357 return (error); 2358 } 2359 2360 static struct lltable * 2361 in6_lltattach(struct ifnet *ifp) 2362 { 2363 struct lltable *llt; 2364 2365 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2366 llt->llt_af = AF_INET6; 2367 llt->llt_ifp = ifp; 2368 2369 llt->llt_lookup = in6_lltable_lookup; 2370 llt->llt_alloc_entry = in6_lltable_alloc; 2371 llt->llt_delete_entry = in6_lltable_delete_entry; 2372 llt->llt_dump_entry = in6_lltable_dump_entry; 2373 llt->llt_hash = in6_lltable_hash; 2374 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2375 llt->llt_free_entry = in6_lltable_free_entry; 2376 llt->llt_match_prefix = in6_lltable_match_prefix; 2377 lltable_link(llt); 2378 2379 return (llt); 2380 } 2381 2382 void * 2383 in6_domifattach(struct ifnet *ifp) 2384 { 2385 struct in6_ifextra *ext; 2386 2387 /* There are not IPv6-capable interfaces. */ 2388 switch (ifp->if_type) { 2389 case IFT_PFLOG: 2390 case IFT_PFSYNC: 2391 case IFT_USB: 2392 return (NULL); 2393 } 2394 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2395 bzero(ext, sizeof(*ext)); 2396 2397 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2398 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2399 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2400 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2401 2402 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2403 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2404 M_WAITOK); 2405 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2406 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2407 2408 ext->nd_ifinfo = nd6_ifattach(ifp); 2409 ext->scope6_id = scope6_ifattach(ifp); 2410 ext->lltable = in6_lltattach(ifp); 2411 2412 ext->mld_ifinfo = mld_domifattach(ifp); 2413 2414 return ext; 2415 } 2416 2417 int 2418 in6_domifmtu(struct ifnet *ifp) 2419 { 2420 if (ifp->if_afdata[AF_INET6] == NULL) 2421 return ifp->if_mtu; 2422 2423 return (IN6_LINKMTU(ifp)); 2424 } 2425 2426 void 2427 in6_domifdetach(struct ifnet *ifp, void *aux) 2428 { 2429 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2430 2431 mld_domifdetach(ifp); 2432 scope6_ifdetach(ext->scope6_id); 2433 nd6_ifdetach(ifp, ext->nd_ifinfo); 2434 lltable_free(ext->lltable); 2435 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2436 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2437 free(ext->in6_ifstat, M_IFADDR); 2438 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2439 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2440 free(ext->icmp6_ifstat, M_IFADDR); 2441 free(ext, M_IFADDR); 2442 } 2443 2444 /* 2445 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2446 * v4 mapped addr or v4 compat addr 2447 */ 2448 void 2449 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2450 { 2451 2452 bzero(sin, sizeof(*sin)); 2453 sin->sin_len = sizeof(struct sockaddr_in); 2454 sin->sin_family = AF_INET; 2455 sin->sin_port = sin6->sin6_port; 2456 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2457 } 2458 2459 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2460 void 2461 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2462 { 2463 bzero(sin6, sizeof(*sin6)); 2464 sin6->sin6_len = sizeof(struct sockaddr_in6); 2465 sin6->sin6_family = AF_INET6; 2466 sin6->sin6_port = sin->sin_port; 2467 sin6->sin6_addr.s6_addr32[0] = 0; 2468 sin6->sin6_addr.s6_addr32[1] = 0; 2469 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2470 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2471 } 2472 2473 /* Convert sockaddr_in6 into sockaddr_in. */ 2474 void 2475 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2476 { 2477 struct sockaddr_in *sin_p; 2478 struct sockaddr_in6 sin6; 2479 2480 /* 2481 * Save original sockaddr_in6 addr and convert it 2482 * to sockaddr_in. 2483 */ 2484 sin6 = *(struct sockaddr_in6 *)nam; 2485 sin_p = (struct sockaddr_in *)nam; 2486 in6_sin6_2_sin(sin_p, &sin6); 2487 } 2488 2489 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2490 void 2491 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2492 { 2493 struct sockaddr_in *sin_p; 2494 struct sockaddr_in6 *sin6_p; 2495 2496 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2497 sin_p = (struct sockaddr_in *)*nam; 2498 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2499 free(*nam, M_SONAME); 2500 *nam = (struct sockaddr *)sin6_p; 2501 } 2502