in6.c revision 337460
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: stable/11/sys/netinet6/in6.c 337460 2018-08-08 16:09:28Z ae $"); 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 113VNET_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 */ 119const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 120const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 121const struct in6_addr in6addr_nodelocal_allnodes = 122 IN6ADDR_NODELOCAL_ALLNODES_INIT; 123const struct in6_addr in6addr_linklocal_allnodes = 124 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 125const struct in6_addr in6addr_linklocal_allrouters = 126 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 127const struct in6_addr in6addr_linklocal_allv2routers = 128 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 129 130const struct in6_addr in6mask0 = IN6MASK0; 131const struct in6_addr in6mask32 = IN6MASK32; 132const struct in6_addr in6mask64 = IN6MASK64; 133const struct in6_addr in6mask96 = IN6MASK96; 134const struct in6_addr in6mask128 = IN6MASK128; 135 136const struct sockaddr_in6 sa6_any = 137 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 138 139static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 140 struct in6_aliasreq *, int); 141static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 142 143static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 144 struct in6_ifaddr *, int); 145static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 146 struct in6_aliasreq *, int flags); 147static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 148 struct in6_ifaddr *, int, int); 149static 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 156void 157in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 158{ 159 struct sockaddr_dl gateway; 160 struct sockaddr_in6 mask, addr; 161 struct rtentry rt; 162 int fibnum; 163 164 /* 165 * initialize for rtmsg generation 166 */ 167 bzero(&gateway, sizeof(gateway)); 168 gateway.sdl_len = sizeof(gateway); 169 gateway.sdl_family = AF_LINK; 170 171 bzero(&rt, sizeof(rt)); 172 rt.rt_gateway = (struct sockaddr *)&gateway; 173 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 174 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 175 rt_mask(&rt) = (struct sockaddr *)&mask; 176 rt_key(&rt) = (struct sockaddr *)&addr; 177 rt.rt_flags = RTF_HOST | RTF_STATIC; 178 if (cmd == RTM_ADD) 179 rt.rt_flags |= RTF_UP; 180 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib; 181 /* Announce arrival of local address to this FIB. */ 182 rt_newaddrmsg_fib(cmd, &ia->ia_ifa, 0, &rt, fibnum); 183} 184 185int 186in6_mask2len(struct in6_addr *mask, u_char *lim0) 187{ 188 int x = 0, y; 189 u_char *lim = lim0, *p; 190 191 /* ignore the scope_id part */ 192 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 193 lim = (u_char *)mask + sizeof(*mask); 194 for (p = (u_char *)mask; p < lim; x++, p++) { 195 if (*p != 0xff) 196 break; 197 } 198 y = 0; 199 if (p < lim) { 200 for (y = 0; y < 8; y++) { 201 if ((*p & (0x80 >> y)) == 0) 202 break; 203 } 204 } 205 206 /* 207 * when the limit pointer is given, do a stricter check on the 208 * remaining bits. 209 */ 210 if (p < lim) { 211 if (y != 0 && (*p & (0x00ff >> y)) != 0) 212 return (-1); 213 for (p = p + 1; p < lim; p++) 214 if (*p != 0) 215 return (-1); 216 } 217 218 return x * 8 + y; 219} 220 221#ifdef COMPAT_FREEBSD32 222struct in6_ndifreq32 { 223 char ifname[IFNAMSIZ]; 224 uint32_t ifindex; 225}; 226#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 227#endif 228 229int 230in6_control(struct socket *so, u_long cmd, caddr_t data, 231 struct ifnet *ifp, struct thread *td) 232{ 233 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 234 struct in6_ifaddr *ia = NULL; 235 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 236 struct sockaddr_in6 *sa6; 237 int carp_attached = 0; 238 int error; 239 u_long ocmd = cmd; 240 241 /* 242 * Compat to make pre-10.x ifconfig(8) operable. 243 */ 244 if (cmd == OSIOCAIFADDR_IN6) 245 cmd = SIOCAIFADDR_IN6; 246 247 switch (cmd) { 248 case SIOCGETSGCNT_IN6: 249 case SIOCGETMIFCNT_IN6: 250 /* 251 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 252 * We cannot see how that would be needed, so do not adjust the 253 * KPI blindly; more likely should clean up the IPv4 variant. 254 */ 255 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 256 } 257 258 switch (cmd) { 259 case SIOCAADDRCTL_POLICY: 260 case SIOCDADDRCTL_POLICY: 261 if (td != NULL) { 262 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 263 if (error) 264 return (error); 265 } 266 return (in6_src_ioctl(cmd, data)); 267 } 268 269 if (ifp == NULL) 270 return (EOPNOTSUPP); 271 272 switch (cmd) { 273 case SIOCSNDFLUSH_IN6: 274 case SIOCSPFXFLUSH_IN6: 275 case SIOCSRTRFLUSH_IN6: 276 case SIOCSDEFIFACE_IN6: 277 case SIOCSIFINFO_FLAGS: 278 case SIOCSIFINFO_IN6: 279 if (td != NULL) { 280 error = priv_check(td, PRIV_NETINET_ND6); 281 if (error) 282 return (error); 283 } 284 /* FALLTHROUGH */ 285 case OSIOCGIFINFO_IN6: 286 case SIOCGIFINFO_IN6: 287 case SIOCGNBRINFO_IN6: 288 case SIOCGDEFIFACE_IN6: 289 return (nd6_ioctl(cmd, data, ifp)); 290 291#ifdef COMPAT_FREEBSD32 292 case SIOCGDEFIFACE32_IN6: 293 { 294 struct in6_ndifreq ndif; 295 struct in6_ndifreq32 *ndif32; 296 297 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 298 ifp); 299 if (error) 300 return (error); 301 ndif32 = (struct in6_ndifreq32 *)data; 302 ndif32->ifindex = ndif.ifindex; 303 return (0); 304 } 305#endif 306 } 307 308 switch (cmd) { 309 case SIOCSIFPREFIX_IN6: 310 case SIOCDIFPREFIX_IN6: 311 case SIOCAIFPREFIX_IN6: 312 case SIOCCIFPREFIX_IN6: 313 case SIOCSGIFPREFIX_IN6: 314 case SIOCGIFPREFIX_IN6: 315 log(LOG_NOTICE, 316 "prefix ioctls are now invalidated. " 317 "please use ifconfig.\n"); 318 return (EOPNOTSUPP); 319 } 320 321 switch (cmd) { 322 case SIOCSSCOPE6: 323 if (td != NULL) { 324 error = priv_check(td, PRIV_NETINET_SCOPE6); 325 if (error) 326 return (error); 327 } 328 /* FALLTHROUGH */ 329 case SIOCGSCOPE6: 330 case SIOCGSCOPE6DEF: 331 return (scope6_ioctl(cmd, data, ifp)); 332 } 333 334 /* 335 * Find address for this interface, if it exists. 336 * 337 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 338 * only, and used the first interface address as the target of other 339 * operations (without checking ifra_addr). This was because netinet 340 * code/API assumed at most 1 interface address per interface. 341 * Since IPv6 allows a node to assign multiple addresses 342 * on a single interface, we almost always look and check the 343 * presence of ifra_addr, and reject invalid ones here. 344 * It also decreases duplicated code among SIOC*_IN6 operations. 345 */ 346 switch (cmd) { 347 case SIOCAIFADDR_IN6: 348 case SIOCSIFPHYADDR_IN6: 349 sa6 = &ifra->ifra_addr; 350 break; 351 case SIOCSIFADDR_IN6: 352 case SIOCGIFADDR_IN6: 353 case SIOCSIFDSTADDR_IN6: 354 case SIOCSIFNETMASK_IN6: 355 case SIOCGIFDSTADDR_IN6: 356 case SIOCGIFNETMASK_IN6: 357 case SIOCDIFADDR_IN6: 358 case SIOCGIFPSRCADDR_IN6: 359 case SIOCGIFPDSTADDR_IN6: 360 case SIOCGIFAFLAG_IN6: 361 case SIOCSNDFLUSH_IN6: 362 case SIOCSPFXFLUSH_IN6: 363 case SIOCSRTRFLUSH_IN6: 364 case SIOCGIFALIFETIME_IN6: 365 case SIOCGIFSTAT_IN6: 366 case SIOCGIFSTAT_ICMP6: 367 sa6 = &ifr->ifr_addr; 368 break; 369 case SIOCSIFADDR: 370 case SIOCSIFBRDADDR: 371 case SIOCSIFDSTADDR: 372 case SIOCSIFNETMASK: 373 /* 374 * Although we should pass any non-INET6 ioctl requests 375 * down to driver, we filter some legacy INET requests. 376 * Drivers trust SIOCSIFADDR et al to come from an already 377 * privileged layer, and do not perform any credentials 378 * checks or input validation. 379 */ 380 return (EINVAL); 381 default: 382 sa6 = NULL; 383 break; 384 } 385 if (sa6 && sa6->sin6_family == AF_INET6) { 386 if (sa6->sin6_scope_id != 0) 387 error = sa6_embedscope(sa6, 0); 388 else 389 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 390 if (error != 0) 391 return (error); 392 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 393 &sa6->sin6_addr)) != 0) 394 return (error); 395 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 396 } else 397 ia = NULL; 398 399 switch (cmd) { 400 case SIOCSIFADDR_IN6: 401 case SIOCSIFDSTADDR_IN6: 402 case SIOCSIFNETMASK_IN6: 403 /* 404 * Since IPv6 allows a node to assign multiple addresses 405 * on a single interface, SIOCSIFxxx ioctls are deprecated. 406 */ 407 /* we decided to obsolete this command (20000704) */ 408 error = EINVAL; 409 goto out; 410 411 case SIOCDIFADDR_IN6: 412 /* 413 * for IPv4, we look for existing in_ifaddr here to allow 414 * "ifconfig if0 delete" to remove the first IPv4 address on 415 * the interface. For IPv6, as the spec allows multiple 416 * interface address from the day one, we consider "remove the 417 * first one" semantics to be not preferable. 418 */ 419 if (ia == NULL) { 420 error = EADDRNOTAVAIL; 421 goto out; 422 } 423 /* FALLTHROUGH */ 424 case SIOCAIFADDR_IN6: 425 /* 426 * We always require users to specify a valid IPv6 address for 427 * the corresponding operation. 428 */ 429 if (ifra->ifra_addr.sin6_family != AF_INET6 || 430 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 431 error = EAFNOSUPPORT; 432 goto out; 433 } 434 435 if (td != NULL) { 436 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 437 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 438 if (error) 439 goto out; 440 } 441 /* FALLTHROUGH */ 442 case SIOCGIFSTAT_IN6: 443 case SIOCGIFSTAT_ICMP6: 444 if (ifp->if_afdata[AF_INET6] == NULL) { 445 error = EPFNOSUPPORT; 446 goto out; 447 } 448 break; 449 450 case SIOCGIFADDR_IN6: 451 /* This interface is basically deprecated. use SIOCGIFCONF. */ 452 /* FALLTHROUGH */ 453 case SIOCGIFAFLAG_IN6: 454 case SIOCGIFNETMASK_IN6: 455 case SIOCGIFDSTADDR_IN6: 456 case SIOCGIFALIFETIME_IN6: 457 /* must think again about its semantics */ 458 if (ia == NULL) { 459 error = EADDRNOTAVAIL; 460 goto out; 461 } 462 break; 463 } 464 465 switch (cmd) { 466 case SIOCGIFADDR_IN6: 467 ifr->ifr_addr = ia->ia_addr; 468 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 469 goto out; 470 break; 471 472 case SIOCGIFDSTADDR_IN6: 473 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 474 error = EINVAL; 475 goto out; 476 } 477 /* 478 * XXX: should we check if ifa_dstaddr is NULL and return 479 * an error? 480 */ 481 ifr->ifr_dstaddr = ia->ia_dstaddr; 482 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 483 goto out; 484 break; 485 486 case SIOCGIFNETMASK_IN6: 487 ifr->ifr_addr = ia->ia_prefixmask; 488 break; 489 490 case SIOCGIFAFLAG_IN6: 491 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 492 break; 493 494 case SIOCGIFSTAT_IN6: 495 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 496 ifp->if_afdata[AF_INET6])->in6_ifstat, 497 &ifr->ifr_ifru.ifru_stat, 498 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 499 break; 500 501 case SIOCGIFSTAT_ICMP6: 502 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 503 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 504 &ifr->ifr_ifru.ifru_icmp6stat, 505 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 506 break; 507 508 case SIOCGIFALIFETIME_IN6: 509 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 510 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 511 time_t maxexpire; 512 struct in6_addrlifetime *retlt = 513 &ifr->ifr_ifru.ifru_lifetime; 514 515 /* 516 * XXX: adjust expiration time assuming time_t is 517 * signed. 518 */ 519 maxexpire = (-1) & 520 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 521 if (ia->ia6_lifetime.ia6t_vltime < 522 maxexpire - ia->ia6_updatetime) { 523 retlt->ia6t_expire = ia->ia6_updatetime + 524 ia->ia6_lifetime.ia6t_vltime; 525 } else 526 retlt->ia6t_expire = maxexpire; 527 } 528 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 529 time_t maxexpire; 530 struct in6_addrlifetime *retlt = 531 &ifr->ifr_ifru.ifru_lifetime; 532 533 /* 534 * XXX: adjust expiration time assuming time_t is 535 * signed. 536 */ 537 maxexpire = (-1) & 538 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 539 if (ia->ia6_lifetime.ia6t_pltime < 540 maxexpire - ia->ia6_updatetime) { 541 retlt->ia6t_preferred = ia->ia6_updatetime + 542 ia->ia6_lifetime.ia6t_pltime; 543 } else 544 retlt->ia6t_preferred = maxexpire; 545 } 546 break; 547 548 case SIOCAIFADDR_IN6: 549 { 550 struct nd_prefixctl pr0; 551 struct nd_prefix *pr; 552 553 /* 554 * first, make or update the interface address structure, 555 * and link it to the list. 556 */ 557 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 558 goto out; 559 if (ia != NULL) 560 ifa_free(&ia->ia_ifa); 561 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 562 == NULL) { 563 /* 564 * this can happen when the user specify the 0 valid 565 * lifetime. 566 */ 567 break; 568 } 569 570 if (cmd == ocmd && ifra->ifra_vhid > 0) { 571 if (carp_attach_p != NULL) 572 error = (*carp_attach_p)(&ia->ia_ifa, 573 ifra->ifra_vhid); 574 else 575 error = EPROTONOSUPPORT; 576 if (error) 577 goto out; 578 else 579 carp_attached = 1; 580 } 581 582 /* 583 * then, make the prefix on-link on the interface. 584 * XXX: we'd rather create the prefix before the address, but 585 * we need at least one address to install the corresponding 586 * interface route, so we configure the address first. 587 */ 588 589 /* 590 * convert mask to prefix length (prefixmask has already 591 * been validated in in6_update_ifa(). 592 */ 593 bzero(&pr0, sizeof(pr0)); 594 pr0.ndpr_ifp = ifp; 595 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 596 NULL); 597 if (pr0.ndpr_plen == 128) { 598 /* we don't need to install a host route. */ 599 goto aifaddr_out; 600 } 601 pr0.ndpr_prefix = ifra->ifra_addr; 602 /* apply the mask for safety. */ 603 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 604 &ifra->ifra_prefixmask.sin6_addr); 605 606 /* 607 * XXX: since we don't have an API to set prefix (not address) 608 * lifetimes, we just use the same lifetimes as addresses. 609 * The (temporarily) installed lifetimes can be overridden by 610 * later advertised RAs (when accept_rtadv is non 0), which is 611 * an intended behavior. 612 */ 613 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 614 pr0.ndpr_raf_auto = 615 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 616 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 617 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 618 619 /* add the prefix if not yet. */ 620 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 621 /* 622 * nd6_prelist_add will install the corresponding 623 * interface route. 624 */ 625 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 626 if (carp_attached) 627 (*carp_detach_p)(&ia->ia_ifa); 628 goto out; 629 } 630 } 631 632 /* relate the address to the prefix */ 633 if (ia->ia6_ndpr == NULL) { 634 ia->ia6_ndpr = pr; 635 pr->ndpr_addrcnt++; 636 637 /* 638 * If this is the first autoconf address from the 639 * prefix, create a temporary address as well 640 * (when required). 641 */ 642 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 643 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 644 int e; 645 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 646 log(LOG_NOTICE, "in6_control: failed " 647 "to create a temporary address, " 648 "errno=%d\n", e); 649 } 650 } 651 } 652 nd6_prefix_rele(pr); 653 654 /* 655 * this might affect the status of autoconfigured addresses, 656 * that is, this address might make other addresses detached. 657 */ 658 pfxlist_onlink_check(); 659 660aifaddr_out: 661 /* 662 * Try to clear the flag when a new IPv6 address is added 663 * onto an IFDISABLED interface and it succeeds. 664 */ 665 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 666 struct in6_ndireq nd; 667 668 memset(&nd, 0, sizeof(nd)); 669 nd.ndi.flags = ND_IFINFO(ifp)->flags; 670 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 671 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 672 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 673 "SIOCSIFINFO_FLAGS for -ifdisabled " 674 "failed."); 675 /* 676 * Ignore failure of clearing the flag intentionally. 677 * The failure means address duplication was detected. 678 */ 679 } 680 break; 681 } 682 683 case SIOCDIFADDR_IN6: 684 { 685 struct nd_prefix *pr; 686 687 /* 688 * If the address being deleted is the only one that owns 689 * the corresponding prefix, expire the prefix as well. 690 * XXX: theoretically, we don't have to worry about such 691 * relationship, since we separate the address management 692 * and the prefix management. We do this, however, to provide 693 * as much backward compatibility as possible in terms of 694 * the ioctl operation. 695 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 696 */ 697 pr = ia->ia6_ndpr; 698 in6_purgeaddr(&ia->ia_ifa); 699 if (pr != NULL && pr->ndpr_addrcnt == 0) { 700 ND6_WLOCK(); 701 nd6_prefix_unlink(pr, NULL); 702 ND6_WUNLOCK(); 703 nd6_prefix_del(pr); 704 } 705 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 706 break; 707 } 708 709 default: 710 if (ifp->if_ioctl == NULL) { 711 error = EOPNOTSUPP; 712 goto out; 713 } 714 error = (*ifp->if_ioctl)(ifp, cmd, data); 715 goto out; 716 } 717 718 error = 0; 719out: 720 if (ia != NULL) 721 ifa_free(&ia->ia_ifa); 722 return (error); 723} 724 725 726/* 727 * Join necessary multicast groups. Factored out from in6_update_ifa(). 728 * This entire work should only be done once, for the default FIB. 729 */ 730static int 731in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 732 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 733{ 734 char ip6buf[INET6_ADDRSTRLEN]; 735 struct in6_addr mltaddr; 736 struct in6_multi_mship *imm; 737 int delay, error; 738 739 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 740 741 /* Join solicited multicast addr for new host id. */ 742 bzero(&mltaddr, sizeof(struct in6_addr)); 743 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 744 mltaddr.s6_addr32[2] = htonl(1); 745 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 746 mltaddr.s6_addr8[12] = 0xff; 747 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 748 /* XXX: should not happen */ 749 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 750 goto cleanup; 751 } 752 delay = error = 0; 753 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 754 /* 755 * We need a random delay for DAD on the address being 756 * configured. It also means delaying transmission of the 757 * corresponding MLD report to avoid report collision. 758 * [RFC 4861, Section 6.3.7] 759 */ 760 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 761 } 762 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 763 if (imm == NULL) { 764 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 765 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 766 if_name(ifp), error)); 767 goto cleanup; 768 } 769 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 770 *in6m_sol = imm->i6mm_maddr; 771 772 /* 773 * Join link-local all-nodes address. 774 */ 775 mltaddr = in6addr_linklocal_allnodes; 776 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 777 goto cleanup; /* XXX: should not fail */ 778 779 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 780 if (imm == NULL) { 781 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 782 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 783 if_name(ifp), error)); 784 goto cleanup; 785 } 786 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 787 788 /* 789 * Join node information group address. 790 */ 791 delay = 0; 792 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 793 /* 794 * The spec does not say anything about delay for this group, 795 * but the same logic should apply. 796 */ 797 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 798 } 799 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 800 /* XXX jinmei */ 801 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 802 if (imm == NULL) 803 nd6log((LOG_WARNING, 804 "%s: in6_joingroup failed for %s on %s " 805 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 806 &mltaddr), if_name(ifp), error)); 807 /* XXX not very fatal, go on... */ 808 else 809 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 810 } 811 if (V_icmp6_nodeinfo_oldmcprefix && 812 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 813 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 814 if (imm == NULL) 815 nd6log((LOG_WARNING, 816 "%s: in6_joingroup failed for %s on %s " 817 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 818 &mltaddr), if_name(ifp), error)); 819 /* XXX not very fatal, go on... */ 820 else 821 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 822 } 823 824 /* 825 * Join interface-local all-nodes address. 826 * (ff01::1%ifN, and ff01::%ifN/32) 827 */ 828 mltaddr = in6addr_nodelocal_allnodes; 829 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 830 goto cleanup; /* XXX: should not fail */ 831 832 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 833 if (imm == NULL) { 834 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 835 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 836 &mltaddr), if_name(ifp), error)); 837 goto cleanup; 838 } 839 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 840 841cleanup: 842 return (error); 843} 844 845/* 846 * Update parameters of an IPv6 interface address. 847 * If necessary, a new entry is created and linked into address chains. 848 * This function is separated from in6_control(). 849 */ 850int 851in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 852 struct in6_ifaddr *ia, int flags) 853{ 854 int error, hostIsNew = 0; 855 856 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 857 return (error); 858 859 if (ia == NULL) { 860 hostIsNew = 1; 861 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 862 return (ENOBUFS); 863 } 864 865 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 866 if (error != 0) { 867 if (hostIsNew != 0) { 868 in6_unlink_ifa(ia, ifp); 869 ifa_free(&ia->ia_ifa); 870 } 871 return (error); 872 } 873 874 if (hostIsNew) 875 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 876 877 return (error); 878} 879 880/* 881 * Fill in basic IPv6 address request info. 882 */ 883void 884in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 885 const struct in6_addr *mask) 886{ 887 888 memset(ifra, 0, sizeof(struct in6_aliasreq)); 889 890 ifra->ifra_addr.sin6_family = AF_INET6; 891 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 892 if (addr != NULL) 893 ifra->ifra_addr.sin6_addr = *addr; 894 895 ifra->ifra_prefixmask.sin6_family = AF_INET6; 896 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 897 if (mask != NULL) 898 ifra->ifra_prefixmask.sin6_addr = *mask; 899} 900 901static int 902in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 903 struct in6_ifaddr *ia, int flags) 904{ 905 int plen = -1; 906 struct sockaddr_in6 dst6; 907 struct in6_addrlifetime *lt; 908 char ip6buf[INET6_ADDRSTRLEN]; 909 910 /* Validate parameters */ 911 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 912 return (EINVAL); 913 914 /* 915 * The destination address for a p2p link must have a family 916 * of AF_UNSPEC or AF_INET6. 917 */ 918 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 919 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 920 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 921 return (EAFNOSUPPORT); 922 923 /* 924 * Validate address 925 */ 926 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 927 ifra->ifra_addr.sin6_family != AF_INET6) 928 return (EINVAL); 929 930 /* 931 * validate ifra_prefixmask. don't check sin6_family, netmask 932 * does not carry fields other than sin6_len. 933 */ 934 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 935 return (EINVAL); 936 /* 937 * Because the IPv6 address architecture is classless, we require 938 * users to specify a (non 0) prefix length (mask) for a new address. 939 * We also require the prefix (when specified) mask is valid, and thus 940 * reject a non-consecutive mask. 941 */ 942 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 943 return (EINVAL); 944 if (ifra->ifra_prefixmask.sin6_len != 0) { 945 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 946 (u_char *)&ifra->ifra_prefixmask + 947 ifra->ifra_prefixmask.sin6_len); 948 if (plen <= 0) 949 return (EINVAL); 950 } else { 951 /* 952 * In this case, ia must not be NULL. We just use its prefix 953 * length. 954 */ 955 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 956 } 957 /* 958 * If the destination address on a p2p interface is specified, 959 * and the address is a scoped one, validate/set the scope 960 * zone identifier. 961 */ 962 dst6 = ifra->ifra_dstaddr; 963 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 964 (dst6.sin6_family == AF_INET6)) { 965 struct in6_addr in6_tmp; 966 u_int32_t zoneid; 967 968 in6_tmp = dst6.sin6_addr; 969 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 970 return (EINVAL); /* XXX: should be impossible */ 971 972 if (dst6.sin6_scope_id != 0) { 973 if (dst6.sin6_scope_id != zoneid) 974 return (EINVAL); 975 } else /* user omit to specify the ID. */ 976 dst6.sin6_scope_id = zoneid; 977 978 /* convert into the internal form */ 979 if (sa6_embedscope(&dst6, 0)) 980 return (EINVAL); /* XXX: should be impossible */ 981 } 982 /* Modify original ifra_dstaddr to reflect changes */ 983 ifra->ifra_dstaddr = dst6; 984 985 /* 986 * The destination address can be specified only for a p2p or a 987 * loopback interface. If specified, the corresponding prefix length 988 * must be 128. 989 */ 990 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 991 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 992 /* XXX: noisy message */ 993 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 994 "be specified for a p2p or a loopback IF only\n")); 995 return (EINVAL); 996 } 997 if (plen != 128) { 998 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 999 "be 128 when dstaddr is specified\n")); 1000 return (EINVAL); 1001 } 1002 } 1003 /* lifetime consistency check */ 1004 lt = &ifra->ifra_lifetime; 1005 if (lt->ia6t_pltime > lt->ia6t_vltime) 1006 return (EINVAL); 1007 if (lt->ia6t_vltime == 0) { 1008 /* 1009 * the following log might be noisy, but this is a typical 1010 * configuration mistake or a tool's bug. 1011 */ 1012 nd6log((LOG_INFO, 1013 "in6_update_ifa: valid lifetime is 0 for %s\n", 1014 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1015 1016 if (ia == NULL) 1017 return (0); /* there's nothing to do */ 1018 } 1019 1020 /* Check prefix mask */ 1021 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1022 /* 1023 * We prohibit changing the prefix length of an existing 1024 * address, because 1025 * + such an operation should be rare in IPv6, and 1026 * + the operation would confuse prefix management. 1027 */ 1028 if (ia->ia_prefixmask.sin6_len != 0 && 1029 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1030 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1031 "of an existing %s address should not be changed\n", 1032 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1033 1034 return (EINVAL); 1035 } 1036 } 1037 1038 return (0); 1039} 1040 1041 1042/* 1043 * Allocate a new ifaddr and link it into chains. 1044 */ 1045static struct in6_ifaddr * 1046in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1047{ 1048 struct in6_ifaddr *ia; 1049 1050 /* 1051 * When in6_alloc_ifa() is called in a process of a received 1052 * RA, it is called under an interrupt context. So, we should 1053 * call malloc with M_NOWAIT. 1054 */ 1055 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1056 if (ia == NULL) 1057 return (NULL); 1058 LIST_INIT(&ia->ia6_memberships); 1059 /* Initialize the address and masks, and put time stamp */ 1060 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1061 ia->ia_addr.sin6_family = AF_INET6; 1062 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1063 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1064 ia->ia_addr = ifra->ifra_addr; 1065 ia->ia6_createtime = time_uptime; 1066 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1067 /* 1068 * Some functions expect that ifa_dstaddr is not 1069 * NULL for p2p interfaces. 1070 */ 1071 ia->ia_ifa.ifa_dstaddr = 1072 (struct sockaddr *)&ia->ia_dstaddr; 1073 } else { 1074 ia->ia_ifa.ifa_dstaddr = NULL; 1075 } 1076 1077 /* set prefix mask if any */ 1078 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1079 if (ifra->ifra_prefixmask.sin6_len != 0) { 1080 ia->ia_prefixmask.sin6_family = AF_INET6; 1081 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1082 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1083 } 1084 1085 ia->ia_ifp = ifp; 1086 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1087 IF_ADDR_WLOCK(ifp); 1088 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1089 IF_ADDR_WUNLOCK(ifp); 1090 1091 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1092 IN6_IFADDR_WLOCK(); 1093 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1094 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1095 IN6_IFADDR_WUNLOCK(); 1096 1097 return (ia); 1098} 1099 1100/* 1101 * Update/configure interface address parameters: 1102 * 1103 * 1) Update lifetime 1104 * 2) Update interface metric ad flags 1105 * 3) Notify other subsystems 1106 */ 1107static int 1108in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1109 struct in6_ifaddr *ia, int hostIsNew, int flags) 1110{ 1111 int error; 1112 1113 /* update timestamp */ 1114 ia->ia6_updatetime = time_uptime; 1115 1116 /* 1117 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1118 * to see if the address is deprecated or invalidated, but initialize 1119 * these members for applications. 1120 */ 1121 ia->ia6_lifetime = ifra->ifra_lifetime; 1122 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1123 ia->ia6_lifetime.ia6t_expire = 1124 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1125 } else 1126 ia->ia6_lifetime.ia6t_expire = 0; 1127 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1128 ia->ia6_lifetime.ia6t_preferred = 1129 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1130 } else 1131 ia->ia6_lifetime.ia6t_preferred = 0; 1132 1133 /* 1134 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1135 * userland, make it deprecated. 1136 */ 1137 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1138 ia->ia6_lifetime.ia6t_pltime = 0; 1139 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1140 } 1141 1142 /* 1143 * configure address flags. 1144 */ 1145 ia->ia6_flags = ifra->ifra_flags; 1146 1147 /* 1148 * Make the address tentative before joining multicast addresses, 1149 * so that corresponding MLD responses would not have a tentative 1150 * source address. 1151 */ 1152 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1153 1154 /* 1155 * DAD should be performed for an new address or addresses on 1156 * an interface with ND6_IFF_IFDISABLED. 1157 */ 1158 if (in6if_do_dad(ifp) && 1159 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1160 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1161 1162 /* notify other subsystems */ 1163 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1164 1165 return (error); 1166} 1167 1168/* 1169 * Do link-level ifa job: 1170 * 1) Add lle entry for added address 1171 * 2) Notifies routing socket users about new address 1172 * 3) join appropriate multicast group 1173 * 4) start DAD if enabled 1174 */ 1175static int 1176in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1177 struct in6_ifaddr *ia, int flags) 1178{ 1179 struct in6_multi *in6m_sol; 1180 int error = 0; 1181 1182 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1183 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1184 in6_purgeaddr(&ia->ia_ifa); 1185 ifa_free(&ia->ia_ifa); 1186 return (error); 1187 } 1188 1189 /* Join necessary multicast groups. */ 1190 in6m_sol = NULL; 1191 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1192 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1193 if (error != 0) { 1194 in6_purgeaddr(&ia->ia_ifa); 1195 ifa_free(&ia->ia_ifa); 1196 return (error); 1197 } 1198 } 1199 1200 /* Perform DAD, if the address is TENTATIVE. */ 1201 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1202 int delay, mindelay, maxdelay; 1203 1204 delay = 0; 1205 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1206 /* 1207 * We need to impose a delay before sending an NS 1208 * for DAD. Check if we also needed a delay for the 1209 * corresponding MLD message. If we did, the delay 1210 * should be larger than the MLD delay (this could be 1211 * relaxed a bit, but this simple logic is at least 1212 * safe). 1213 * XXX: Break data hiding guidelines and look at 1214 * state for the solicited multicast group. 1215 */ 1216 mindelay = 0; 1217 if (in6m_sol != NULL && 1218 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1219 mindelay = in6m_sol->in6m_timer; 1220 } 1221 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1222 if (maxdelay - mindelay == 0) 1223 delay = 0; 1224 else { 1225 delay = 1226 (arc4random() % (maxdelay - mindelay)) + 1227 mindelay; 1228 } 1229 } 1230 nd6_dad_start((struct ifaddr *)ia, delay); 1231 } 1232 1233 in6_newaddrmsg(ia, RTM_ADD); 1234 ifa_free(&ia->ia_ifa); 1235 return (error); 1236} 1237 1238void 1239in6_purgeaddr(struct ifaddr *ifa) 1240{ 1241 struct ifnet *ifp = ifa->ifa_ifp; 1242 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1243 struct in6_multi_mship *imm; 1244 int plen, error; 1245 1246 if (ifa->ifa_carp) 1247 (*carp_detach_p)(ifa); 1248 1249 /* 1250 * Remove the loopback route to the interface address. 1251 * The check for the current setting of "nd6_useloopback" 1252 * is not needed. 1253 */ 1254 if (ia->ia_flags & IFA_RTSELF) { 1255 error = ifa_del_loopback_route((struct ifaddr *)ia, 1256 (struct sockaddr *)&ia->ia_addr); 1257 if (error == 0) 1258 ia->ia_flags &= ~IFA_RTSELF; 1259 } 1260 1261 /* stop DAD processing */ 1262 nd6_dad_stop(ifa); 1263 1264 /* Leave multicast groups. */ 1265 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1266 LIST_REMOVE(imm, i6mm_chain); 1267 in6_leavegroup(imm); 1268 } 1269 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1270 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1271 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1272 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1273 if (error != 0) 1274 log(LOG_INFO, "%s: err=%d, destination address delete " 1275 "failed\n", __func__, error); 1276 ia->ia_flags &= ~IFA_ROUTE; 1277 } 1278 1279 in6_newaddrmsg(ia, RTM_DELETE); 1280 in6_unlink_ifa(ia, ifp); 1281} 1282 1283static void 1284in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1285{ 1286 char ip6buf[INET6_ADDRSTRLEN]; 1287 int remove_lle; 1288 1289 IF_ADDR_WLOCK(ifp); 1290 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1291 IF_ADDR_WUNLOCK(ifp); 1292 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1293 1294 /* 1295 * Defer the release of what might be the last reference to the 1296 * in6_ifaddr so that it can't be freed before the remainder of the 1297 * cleanup. 1298 */ 1299 IN6_IFADDR_WLOCK(); 1300 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1301 LIST_REMOVE(ia, ia6_hash); 1302 IN6_IFADDR_WUNLOCK(); 1303 1304 /* 1305 * Release the reference to the base prefix. There should be a 1306 * positive reference. 1307 */ 1308 remove_lle = 0; 1309 if (ia->ia6_ndpr == NULL) { 1310 nd6log((LOG_NOTICE, 1311 "in6_unlink_ifa: autoconf'ed address " 1312 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1313 } else { 1314 ia->ia6_ndpr->ndpr_addrcnt--; 1315 /* Do not delete lles within prefix if refcont != 0 */ 1316 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1317 remove_lle = 1; 1318 ia->ia6_ndpr = NULL; 1319 } 1320 1321 nd6_rem_ifa_lle(ia, remove_lle); 1322 1323 /* 1324 * Also, if the address being removed is autoconf'ed, call 1325 * pfxlist_onlink_check() since the release might affect the status of 1326 * other (detached) addresses. 1327 */ 1328 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1329 pfxlist_onlink_check(); 1330 } 1331 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1332} 1333 1334/* 1335 * Notifies other subsystems about address change/arrival: 1336 * 1) Notifies device handler on the first IPv6 address assignment 1337 * 2) Handle routing table changes for P2P links and route 1338 * 3) Handle routing table changes for address host route 1339 */ 1340static int 1341in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1342 struct in6_aliasreq *ifra, int hostIsNew) 1343{ 1344 int error = 0, plen, ifacount = 0; 1345 struct ifaddr *ifa; 1346 struct sockaddr_in6 *pdst; 1347 char ip6buf[INET6_ADDRSTRLEN]; 1348 1349 /* 1350 * Give the interface a chance to initialize 1351 * if this is its first address, 1352 */ 1353 if (hostIsNew != 0) { 1354 IF_ADDR_RLOCK(ifp); 1355 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1356 if (ifa->ifa_addr->sa_family != AF_INET6) 1357 continue; 1358 ifacount++; 1359 } 1360 IF_ADDR_RUNLOCK(ifp); 1361 } 1362 1363 if (ifacount <= 1 && ifp->if_ioctl) { 1364 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1365 if (error) 1366 goto done; 1367 } 1368 1369 /* 1370 * If a new destination address is specified, scrub the old one and 1371 * install the new destination. Note that the interface must be 1372 * p2p or loopback. 1373 */ 1374 pdst = &ifra->ifra_dstaddr; 1375 if (pdst->sin6_family == AF_INET6 && 1376 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1377 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1378 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1379 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1380 "remove a route to the old destination: %s\n", 1381 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1382 /* proceed anyway... */ 1383 } else 1384 ia->ia_flags &= ~IFA_ROUTE; 1385 ia->ia_dstaddr = *pdst; 1386 } 1387 1388 /* 1389 * If a new destination address is specified for a point-to-point 1390 * interface, install a route to the destination as an interface 1391 * direct route. 1392 * XXX: the logic below rejects assigning multiple addresses on a p2p 1393 * interface that share the same destination. 1394 */ 1395 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1396 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1397 ia->ia_dstaddr.sin6_family == AF_INET6) { 1398 int rtflags = RTF_UP | RTF_HOST; 1399 /* 1400 * Handle the case for ::1 . 1401 */ 1402 if (ifp->if_flags & IFF_LOOPBACK) 1403 ia->ia_flags |= IFA_RTSELF; 1404 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1405 if (error) 1406 goto done; 1407 ia->ia_flags |= IFA_ROUTE; 1408 } 1409 1410 /* 1411 * add a loopback route to self if not exists 1412 */ 1413 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1414 error = ifa_add_loopback_route((struct ifaddr *)ia, 1415 (struct sockaddr *)&ia->ia_addr); 1416 if (error == 0) 1417 ia->ia_flags |= IFA_RTSELF; 1418 } 1419done: 1420 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1421 "Invoking IPv6 network device address event may sleep"); 1422 1423 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 1424 1425 return (error); 1426} 1427 1428/* 1429 * Find an IPv6 interface link-local address specific to an interface. 1430 * ifaddr is returned referenced. 1431 */ 1432struct in6_ifaddr * 1433in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1434{ 1435 struct ifaddr *ifa; 1436 1437 IF_ADDR_RLOCK(ifp); 1438 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1439 if (ifa->ifa_addr->sa_family != AF_INET6) 1440 continue; 1441 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1442 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1443 ignoreflags) != 0) 1444 continue; 1445 ifa_ref(ifa); 1446 break; 1447 } 1448 } 1449 IF_ADDR_RUNLOCK(ifp); 1450 1451 return ((struct in6_ifaddr *)ifa); 1452} 1453 1454 1455/* 1456 * find the interface address corresponding to a given IPv6 address. 1457 * ifaddr is returned referenced. 1458 */ 1459struct in6_ifaddr * 1460in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1461{ 1462 struct rm_priotracker in6_ifa_tracker; 1463 struct in6_ifaddr *ia; 1464 1465 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1466 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1467 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1468 if (zoneid != 0 && 1469 zoneid != ia->ia_addr.sin6_scope_id) 1470 continue; 1471 ifa_ref(&ia->ia_ifa); 1472 break; 1473 } 1474 } 1475 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1476 return (ia); 1477} 1478 1479/* 1480 * find the internet address corresponding to a given interface and address. 1481 * ifaddr is returned referenced. 1482 */ 1483struct in6_ifaddr * 1484in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1485{ 1486 struct ifaddr *ifa; 1487 1488 IF_ADDR_RLOCK(ifp); 1489 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1490 if (ifa->ifa_addr->sa_family != AF_INET6) 1491 continue; 1492 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1493 ifa_ref(ifa); 1494 break; 1495 } 1496 } 1497 IF_ADDR_RUNLOCK(ifp); 1498 1499 return ((struct in6_ifaddr *)ifa); 1500} 1501 1502/* 1503 * Find a link-local scoped address on ifp and return it if any. 1504 */ 1505struct in6_ifaddr * 1506in6ifa_llaonifp(struct ifnet *ifp) 1507{ 1508 struct sockaddr_in6 *sin6; 1509 struct ifaddr *ifa; 1510 1511 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1512 return (NULL); 1513 IF_ADDR_RLOCK(ifp); 1514 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1515 if (ifa->ifa_addr->sa_family != AF_INET6) 1516 continue; 1517 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1518 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1519 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1520 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1521 break; 1522 } 1523 IF_ADDR_RUNLOCK(ifp); 1524 1525 return ((struct in6_ifaddr *)ifa); 1526} 1527 1528/* 1529 * Convert IP6 address to printable (loggable) representation. Caller 1530 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1531 */ 1532static char digits[] = "0123456789abcdef"; 1533char * 1534ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1535{ 1536 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1537 char *cp; 1538 const u_int16_t *a = (const u_int16_t *)addr; 1539 const u_int8_t *d; 1540 int dcolon = 0, zero = 0; 1541 1542 cp = ip6buf; 1543 1544 for (i = 0; i < 8; i++) { 1545 if (*(a + i) == 0) { 1546 cnt++; 1547 if (cnt == 1) 1548 idx = i; 1549 } 1550 else if (maxcnt < cnt) { 1551 maxcnt = cnt; 1552 index = idx; 1553 cnt = 0; 1554 } 1555 } 1556 if (maxcnt < cnt) { 1557 maxcnt = cnt; 1558 index = idx; 1559 } 1560 1561 for (i = 0; i < 8; i++) { 1562 if (dcolon == 1) { 1563 if (*a == 0) { 1564 if (i == 7) 1565 *cp++ = ':'; 1566 a++; 1567 continue; 1568 } else 1569 dcolon = 2; 1570 } 1571 if (*a == 0) { 1572 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1573 if (i == 0) 1574 *cp++ = ':'; 1575 *cp++ = ':'; 1576 dcolon = 1; 1577 } else { 1578 *cp++ = '0'; 1579 *cp++ = ':'; 1580 } 1581 a++; 1582 continue; 1583 } 1584 d = (const u_char *)a; 1585 /* Try to eliminate leading zeros in printout like in :0001. */ 1586 zero = 1; 1587 *cp = digits[*d >> 4]; 1588 if (*cp != '0') { 1589 zero = 0; 1590 cp++; 1591 } 1592 *cp = digits[*d++ & 0xf]; 1593 if (zero == 0 || (*cp != '0')) { 1594 zero = 0; 1595 cp++; 1596 } 1597 *cp = digits[*d >> 4]; 1598 if (zero == 0 || (*cp != '0')) { 1599 zero = 0; 1600 cp++; 1601 } 1602 *cp++ = digits[*d & 0xf]; 1603 *cp++ = ':'; 1604 a++; 1605 } 1606 *--cp = '\0'; 1607 return (ip6buf); 1608} 1609 1610int 1611in6_localaddr(struct in6_addr *in6) 1612{ 1613 struct rm_priotracker in6_ifa_tracker; 1614 struct in6_ifaddr *ia; 1615 1616 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1617 return 1; 1618 1619 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1620 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1621 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1622 &ia->ia_prefixmask.sin6_addr)) { 1623 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1624 return 1; 1625 } 1626 } 1627 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1628 1629 return (0); 1630} 1631 1632/* 1633 * Return 1 if an internet address is for the local host and configured 1634 * on one of its interfaces. 1635 */ 1636int 1637in6_localip(struct in6_addr *in6) 1638{ 1639 struct rm_priotracker in6_ifa_tracker; 1640 struct in6_ifaddr *ia; 1641 1642 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1643 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1644 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1645 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1646 return (1); 1647 } 1648 } 1649 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1650 return (0); 1651} 1652 1653/* 1654 * Return 1 if an internet address is configured on an interface. 1655 */ 1656int 1657in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1658{ 1659 struct in6_addr in6; 1660 struct ifaddr *ifa; 1661 struct in6_ifaddr *ia6; 1662 1663 in6 = *addr; 1664 if (in6_clearscope(&in6)) 1665 return (0); 1666 in6_setscope(&in6, ifp, NULL); 1667 1668 IF_ADDR_RLOCK(ifp); 1669 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1670 if (ifa->ifa_addr->sa_family != AF_INET6) 1671 continue; 1672 ia6 = (struct in6_ifaddr *)ifa; 1673 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1674 IF_ADDR_RUNLOCK(ifp); 1675 return (1); 1676 } 1677 } 1678 IF_ADDR_RUNLOCK(ifp); 1679 1680 return (0); 1681} 1682 1683int 1684in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1685{ 1686 struct rm_priotracker in6_ifa_tracker; 1687 struct in6_ifaddr *ia; 1688 1689 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1690 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1691 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1692 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1693 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1694 return (1); /* true */ 1695 } 1696 break; 1697 } 1698 } 1699 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1700 1701 return (0); /* false */ 1702} 1703 1704/* 1705 * return length of part which dst and src are equal 1706 * hard coding... 1707 */ 1708int 1709in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1710{ 1711 int match = 0; 1712 u_char *s = (u_char *)src, *d = (u_char *)dst; 1713 u_char *lim = s + 16, r; 1714 1715 while (s < lim) 1716 if ((r = (*d++ ^ *s++)) != 0) { 1717 while (r < 128) { 1718 match++; 1719 r <<= 1; 1720 } 1721 break; 1722 } else 1723 match += 8; 1724 return match; 1725} 1726 1727/* XXX: to be scope conscious */ 1728int 1729in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1730{ 1731 int bytelen, bitlen; 1732 1733 /* sanity check */ 1734 if (0 > len || len > 128) { 1735 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1736 len); 1737 return (0); 1738 } 1739 1740 bytelen = len / 8; 1741 bitlen = len % 8; 1742 1743 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1744 return (0); 1745 if (bitlen != 0 && 1746 p1->s6_addr[bytelen] >> (8 - bitlen) != 1747 p2->s6_addr[bytelen] >> (8 - bitlen)) 1748 return (0); 1749 1750 return (1); 1751} 1752 1753void 1754in6_prefixlen2mask(struct in6_addr *maskp, int len) 1755{ 1756 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1757 int bytelen, bitlen, i; 1758 1759 /* sanity check */ 1760 if (0 > len || len > 128) { 1761 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1762 len); 1763 return; 1764 } 1765 1766 bzero(maskp, sizeof(*maskp)); 1767 bytelen = len / 8; 1768 bitlen = len % 8; 1769 for (i = 0; i < bytelen; i++) 1770 maskp->s6_addr[i] = 0xff; 1771 if (bitlen) 1772 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1773} 1774 1775/* 1776 * return the best address out of the same scope. if no address was 1777 * found, return the first valid address from designated IF. 1778 */ 1779struct in6_ifaddr * 1780in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1781{ 1782 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1783 struct ifaddr *ifa; 1784 struct in6_ifaddr *besta = NULL; 1785 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1786 1787 dep[0] = dep[1] = NULL; 1788 1789 /* 1790 * We first look for addresses in the same scope. 1791 * If there is one, return it. 1792 * If two or more, return one which matches the dst longest. 1793 * If none, return one of global addresses assigned other ifs. 1794 */ 1795 IF_ADDR_RLOCK(ifp); 1796 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1797 if (ifa->ifa_addr->sa_family != AF_INET6) 1798 continue; 1799 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1800 continue; /* XXX: is there any case to allow anycast? */ 1801 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1802 continue; /* don't use this interface */ 1803 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1804 continue; 1805 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1806 if (V_ip6_use_deprecated) 1807 dep[0] = (struct in6_ifaddr *)ifa; 1808 continue; 1809 } 1810 1811 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1812 /* 1813 * call in6_matchlen() as few as possible 1814 */ 1815 if (besta) { 1816 if (blen == -1) 1817 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1818 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1819 if (tlen > blen) { 1820 blen = tlen; 1821 besta = (struct in6_ifaddr *)ifa; 1822 } 1823 } else 1824 besta = (struct in6_ifaddr *)ifa; 1825 } 1826 } 1827 if (besta) { 1828 ifa_ref(&besta->ia_ifa); 1829 IF_ADDR_RUNLOCK(ifp); 1830 return (besta); 1831 } 1832 1833 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1834 if (ifa->ifa_addr->sa_family != AF_INET6) 1835 continue; 1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1837 continue; /* XXX: is there any case to allow anycast? */ 1838 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1839 continue; /* don't use this interface */ 1840 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1841 continue; 1842 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1843 if (V_ip6_use_deprecated) 1844 dep[1] = (struct in6_ifaddr *)ifa; 1845 continue; 1846 } 1847 1848 if (ifa != NULL) 1849 ifa_ref(ifa); 1850 IF_ADDR_RUNLOCK(ifp); 1851 return (struct in6_ifaddr *)ifa; 1852 } 1853 1854 /* use the last-resort values, that are, deprecated addresses */ 1855 if (dep[0]) { 1856 ifa_ref((struct ifaddr *)dep[0]); 1857 IF_ADDR_RUNLOCK(ifp); 1858 return dep[0]; 1859 } 1860 if (dep[1]) { 1861 ifa_ref((struct ifaddr *)dep[1]); 1862 IF_ADDR_RUNLOCK(ifp); 1863 return dep[1]; 1864 } 1865 1866 IF_ADDR_RUNLOCK(ifp); 1867 return NULL; 1868} 1869 1870/* 1871 * perform DAD when interface becomes IFF_UP. 1872 */ 1873void 1874in6_if_up(struct ifnet *ifp) 1875{ 1876 struct ifaddr *ifa; 1877 struct in6_ifaddr *ia; 1878 1879 IF_ADDR_RLOCK(ifp); 1880 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1881 if (ifa->ifa_addr->sa_family != AF_INET6) 1882 continue; 1883 ia = (struct in6_ifaddr *)ifa; 1884 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1885 /* 1886 * The TENTATIVE flag was likely set by hand 1887 * beforehand, implicitly indicating the need for DAD. 1888 * We may be able to skip the random delay in this 1889 * case, but we impose delays just in case. 1890 */ 1891 nd6_dad_start(ifa, 1892 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1893 } 1894 } 1895 IF_ADDR_RUNLOCK(ifp); 1896 1897 /* 1898 * special cases, like 6to4, are handled in in6_ifattach 1899 */ 1900 in6_ifattach(ifp, NULL); 1901} 1902 1903int 1904in6if_do_dad(struct ifnet *ifp) 1905{ 1906 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1907 return (0); 1908 1909 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1910 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1911 return (0); 1912 1913 /* 1914 * Our DAD routine requires the interface up and running. 1915 * However, some interfaces can be up before the RUNNING 1916 * status. Additionally, users may try to assign addresses 1917 * before the interface becomes up (or running). 1918 * This function returns EAGAIN in that case. 1919 * The caller should mark "tentative" on the address instead of 1920 * performing DAD immediately. 1921 */ 1922 if (!((ifp->if_flags & IFF_UP) && 1923 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1924 return (EAGAIN); 1925 1926 return (1); 1927} 1928 1929/* 1930 * Calculate max IPv6 MTU through all the interfaces and store it 1931 * to in6_maxmtu. 1932 */ 1933void 1934in6_setmaxmtu(void) 1935{ 1936 unsigned long maxmtu = 0; 1937 struct ifnet *ifp; 1938 1939 IFNET_RLOCK_NOSLEEP(); 1940 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1941 /* this function can be called during ifnet initialization */ 1942 if (!ifp->if_afdata[AF_INET6]) 1943 continue; 1944 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1945 IN6_LINKMTU(ifp) > maxmtu) 1946 maxmtu = IN6_LINKMTU(ifp); 1947 } 1948 IFNET_RUNLOCK_NOSLEEP(); 1949 if (maxmtu) /* update only when maxmtu is positive */ 1950 V_in6_maxmtu = maxmtu; 1951} 1952 1953/* 1954 * Provide the length of interface identifiers to be used for the link attached 1955 * to the given interface. The length should be defined in "IPv6 over 1956 * xxx-link" document. Note that address architecture might also define 1957 * the length for a particular set of address prefixes, regardless of the 1958 * link type. As clarified in rfc2462bis, those two definitions should be 1959 * consistent, and those really are as of August 2004. 1960 */ 1961int 1962in6_if2idlen(struct ifnet *ifp) 1963{ 1964 switch (ifp->if_type) { 1965 case IFT_ETHER: /* RFC2464 */ 1966 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 1967 case IFT_L2VLAN: /* ditto */ 1968 case IFT_IEEE80211: /* ditto */ 1969 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 1970 case IFT_INFINIBAND: 1971 return (64); 1972 case IFT_FDDI: /* RFC2467 */ 1973 return (64); 1974 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 1975 return (64); 1976 case IFT_PPP: /* RFC2472 */ 1977 return (64); 1978 case IFT_ARCNET: /* RFC2497 */ 1979 return (64); 1980 case IFT_FRELAY: /* RFC2590 */ 1981 return (64); 1982 case IFT_IEEE1394: /* RFC3146 */ 1983 return (64); 1984 case IFT_GIF: 1985 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 1986 case IFT_LOOP: 1987 return (64); /* XXX: is this really correct? */ 1988 default: 1989 /* 1990 * Unknown link type: 1991 * It might be controversial to use the today's common constant 1992 * of 64 for these cases unconditionally. For full compliance, 1993 * we should return an error in this case. On the other hand, 1994 * if we simply miss the standard for the link type or a new 1995 * standard is defined for a new link type, the IFID length 1996 * is very likely to be the common constant. As a compromise, 1997 * we always use the constant, but make an explicit notice 1998 * indicating the "unknown" case. 1999 */ 2000 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2001 return (64); 2002 } 2003} 2004 2005#include <sys/sysctl.h> 2006 2007struct in6_llentry { 2008 struct llentry base; 2009}; 2010 2011#define IN6_LLTBL_DEFAULT_HSIZE 32 2012#define IN6_LLTBL_HASH(k, h) \ 2013 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2014 2015/* 2016 * Do actual deallocation of @lle. 2017 */ 2018static void 2019in6_lltable_destroy_lle_unlocked(struct llentry *lle) 2020{ 2021 2022 LLE_LOCK_DESTROY(lle); 2023 LLE_REQ_DESTROY(lle); 2024 free(lle, M_LLTABLE); 2025} 2026 2027/* 2028 * Called by LLE_FREE_LOCKED when number of references 2029 * drops to zero. 2030 */ 2031static void 2032in6_lltable_destroy_lle(struct llentry *lle) 2033{ 2034 2035 LLE_WUNLOCK(lle); 2036 in6_lltable_destroy_lle_unlocked(lle); 2037} 2038 2039static struct llentry * 2040in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2041{ 2042 struct in6_llentry *lle; 2043 2044 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2045 if (lle == NULL) /* NB: caller generates msg */ 2046 return NULL; 2047 2048 lle->base.r_l3addr.addr6 = *addr6; 2049 lle->base.lle_refcnt = 1; 2050 lle->base.lle_free = in6_lltable_destroy_lle; 2051 LLE_LOCK_INIT(&lle->base); 2052 LLE_REQ_INIT(&lle->base); 2053 callout_init(&lle->base.lle_timer, 1); 2054 2055 return (&lle->base); 2056} 2057 2058static int 2059in6_lltable_match_prefix(const struct sockaddr *saddr, 2060 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2061{ 2062 const struct in6_addr *addr, *mask, *lle_addr; 2063 2064 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2065 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2066 lle_addr = &lle->r_l3addr.addr6; 2067 2068 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2069 return (0); 2070 2071 if (lle->la_flags & LLE_IFADDR) { 2072 2073 /* 2074 * Delete LLE_IFADDR records IFF address & flag matches. 2075 * Note that addr is the interface address within prefix 2076 * being matched. 2077 */ 2078 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2079 (flags & LLE_STATIC) != 0) 2080 return (1); 2081 return (0); 2082 } 2083 2084 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2085 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2086 return (1); 2087 2088 return (0); 2089} 2090 2091static void 2092in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2093{ 2094 struct ifnet *ifp; 2095 2096 LLE_WLOCK_ASSERT(lle); 2097 KASSERT(llt != NULL, ("lltable is NULL")); 2098 2099 /* Unlink entry from table */ 2100 if ((lle->la_flags & LLE_LINKED) != 0) { 2101 2102 ifp = llt->llt_ifp; 2103 IF_AFDATA_WLOCK_ASSERT(ifp); 2104 lltable_unlink_entry(llt, lle); 2105 } 2106 2107 llentry_free(lle); 2108} 2109 2110static int 2111in6_lltable_rtcheck(struct ifnet *ifp, 2112 u_int flags, 2113 const struct sockaddr *l3addr) 2114{ 2115 const struct sockaddr_in6 *sin6; 2116 struct nhop6_basic nh6; 2117 struct in6_addr dst; 2118 uint32_t scopeid; 2119 int error; 2120 char ip6buf[INET6_ADDRSTRLEN]; 2121 int fibnum; 2122 2123 KASSERT(l3addr->sa_family == AF_INET6, 2124 ("sin_family %d", l3addr->sa_family)); 2125 2126 sin6 = (const struct sockaddr_in6 *)l3addr; 2127 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2128 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2129 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6); 2130 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2131 struct ifaddr *ifa; 2132 /* 2133 * Create an ND6 cache for an IPv6 neighbor 2134 * that is not covered by our own prefix. 2135 */ 2136 ifa = ifaof_ifpforaddr(l3addr, ifp); 2137 if (ifa != NULL) { 2138 ifa_free(ifa); 2139 return 0; 2140 } 2141 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2142 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2143 return EINVAL; 2144 } 2145 return 0; 2146} 2147 2148static inline uint32_t 2149in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2150{ 2151 2152 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2153} 2154 2155static uint32_t 2156in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2157{ 2158 2159 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2160} 2161 2162static void 2163in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2164{ 2165 struct sockaddr_in6 *sin6; 2166 2167 sin6 = (struct sockaddr_in6 *)sa; 2168 bzero(sin6, sizeof(*sin6)); 2169 sin6->sin6_family = AF_INET6; 2170 sin6->sin6_len = sizeof(*sin6); 2171 sin6->sin6_addr = lle->r_l3addr.addr6; 2172} 2173 2174static inline struct llentry * 2175in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2176{ 2177 struct llentry *lle; 2178 struct llentries *lleh; 2179 u_int hashidx; 2180 2181 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2182 lleh = &llt->lle_head[hashidx]; 2183 LIST_FOREACH(lle, lleh, lle_next) { 2184 if (lle->la_flags & LLE_DELETED) 2185 continue; 2186 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2187 break; 2188 } 2189 2190 return (lle); 2191} 2192 2193static void 2194in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2195{ 2196 2197 lle->la_flags |= LLE_DELETED; 2198 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2199#ifdef DIAGNOSTIC 2200 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2201#endif 2202 llentry_free(lle); 2203} 2204 2205static struct llentry * 2206in6_lltable_alloc(struct lltable *llt, u_int flags, 2207 const struct sockaddr *l3addr) 2208{ 2209 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2210 struct ifnet *ifp = llt->llt_ifp; 2211 struct llentry *lle; 2212 char linkhdr[LLE_MAX_LINKHDR]; 2213 size_t linkhdrsize; 2214 int lladdr_off; 2215 2216 KASSERT(l3addr->sa_family == AF_INET6, 2217 ("sin_family %d", l3addr->sa_family)); 2218 2219 /* 2220 * A route that covers the given address must have 2221 * been installed 1st because we are doing a resolution, 2222 * verify this. 2223 */ 2224 if (!(flags & LLE_IFADDR) && 2225 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2226 return (NULL); 2227 2228 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2229 if (lle == NULL) { 2230 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2231 return (NULL); 2232 } 2233 lle->la_flags = flags; 2234 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2235 linkhdrsize = LLE_MAX_LINKHDR; 2236 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2237 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2238 in6_lltable_destroy_lle_unlocked(lle); 2239 return (NULL); 2240 } 2241 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2242 lladdr_off); 2243 lle->la_flags |= LLE_STATIC; 2244 } 2245 2246 if ((lle->la_flags & LLE_STATIC) != 0) 2247 lle->ln_state = ND6_LLINFO_REACHABLE; 2248 2249 return (lle); 2250} 2251 2252static struct llentry * 2253in6_lltable_lookup(struct lltable *llt, u_int flags, 2254 const struct sockaddr *l3addr) 2255{ 2256 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2257 struct llentry *lle; 2258 2259 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2260 KASSERT(l3addr->sa_family == AF_INET6, 2261 ("sin_family %d", l3addr->sa_family)); 2262 2263 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2264 2265 if (lle == NULL) 2266 return (NULL); 2267 2268 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) != 2269 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X", 2270 flags)); 2271 2272 if (flags & LLE_UNLOCKED) 2273 return (lle); 2274 2275 if (flags & LLE_EXCLUSIVE) 2276 LLE_WLOCK(lle); 2277 else 2278 LLE_RLOCK(lle); 2279 return (lle); 2280} 2281 2282static int 2283in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2284 struct sysctl_req *wr) 2285{ 2286 struct ifnet *ifp = llt->llt_ifp; 2287 /* XXX stack use */ 2288 struct { 2289 struct rt_msghdr rtm; 2290 struct sockaddr_in6 sin6; 2291 /* 2292 * ndp.c assumes that sdl is word aligned 2293 */ 2294#ifdef __LP64__ 2295 uint32_t pad; 2296#endif 2297 struct sockaddr_dl sdl; 2298 } ndpc; 2299 struct sockaddr_dl *sdl; 2300 int error; 2301 2302 bzero(&ndpc, sizeof(ndpc)); 2303 /* skip deleted entries */ 2304 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2305 return (0); 2306 /* Skip if jailed and not a valid IP of the prison. */ 2307 lltable_fill_sa_entry(lle, 2308 (struct sockaddr *)&ndpc.sin6); 2309 if (prison_if(wr->td->td_ucred, 2310 (struct sockaddr *)&ndpc.sin6) != 0) 2311 return (0); 2312 /* 2313 * produce a msg made of: 2314 * struct rt_msghdr; 2315 * struct sockaddr_in6 (IPv6) 2316 * struct sockaddr_dl; 2317 */ 2318 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2319 ndpc.rtm.rtm_version = RTM_VERSION; 2320 ndpc.rtm.rtm_type = RTM_GET; 2321 ndpc.rtm.rtm_flags = RTF_UP; 2322 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2323 if (V_deembed_scopeid) 2324 sa6_recoverscope(&ndpc.sin6); 2325 2326 /* publish */ 2327 if (lle->la_flags & LLE_PUB) 2328 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2329 2330 sdl = &ndpc.sdl; 2331 sdl->sdl_family = AF_LINK; 2332 sdl->sdl_len = sizeof(*sdl); 2333 sdl->sdl_index = ifp->if_index; 2334 sdl->sdl_type = ifp->if_type; 2335 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2336 sdl->sdl_alen = ifp->if_addrlen; 2337 bcopy(lle->ll_addr, LLADDR(sdl), 2338 ifp->if_addrlen); 2339 } else { 2340 sdl->sdl_alen = 0; 2341 bzero(LLADDR(sdl), ifp->if_addrlen); 2342 } 2343 if (lle->la_expire != 0) 2344 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2345 lle->lle_remtime / hz + 2346 time_second - time_uptime; 2347 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2348 if (lle->la_flags & LLE_STATIC) 2349 ndpc.rtm.rtm_flags |= RTF_STATIC; 2350 if (lle->la_flags & LLE_IFADDR) 2351 ndpc.rtm.rtm_flags |= RTF_PINNED; 2352 if (lle->ln_router != 0) 2353 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2354 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2355 /* Store state in rmx_weight value */ 2356 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2357 ndpc.rtm.rtm_index = ifp->if_index; 2358 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2359 2360 return (error); 2361} 2362 2363static struct lltable * 2364in6_lltattach(struct ifnet *ifp) 2365{ 2366 struct lltable *llt; 2367 2368 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2369 llt->llt_af = AF_INET6; 2370 llt->llt_ifp = ifp; 2371 2372 llt->llt_lookup = in6_lltable_lookup; 2373 llt->llt_alloc_entry = in6_lltable_alloc; 2374 llt->llt_delete_entry = in6_lltable_delete_entry; 2375 llt->llt_dump_entry = in6_lltable_dump_entry; 2376 llt->llt_hash = in6_lltable_hash; 2377 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2378 llt->llt_free_entry = in6_lltable_free_entry; 2379 llt->llt_match_prefix = in6_lltable_match_prefix; 2380 lltable_link(llt); 2381 2382 return (llt); 2383} 2384 2385void * 2386in6_domifattach(struct ifnet *ifp) 2387{ 2388 struct in6_ifextra *ext; 2389 2390 /* There are not IPv6-capable interfaces. */ 2391 switch (ifp->if_type) { 2392 case IFT_PFLOG: 2393 case IFT_PFSYNC: 2394 case IFT_USB: 2395 return (NULL); 2396 } 2397 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2398 bzero(ext, sizeof(*ext)); 2399 2400 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2401 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2402 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2403 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2404 2405 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2406 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2407 M_WAITOK); 2408 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2409 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2410 2411 ext->nd_ifinfo = nd6_ifattach(ifp); 2412 ext->scope6_id = scope6_ifattach(ifp); 2413 ext->lltable = in6_lltattach(ifp); 2414 2415 ext->mld_ifinfo = mld_domifattach(ifp); 2416 2417 return ext; 2418} 2419 2420int 2421in6_domifmtu(struct ifnet *ifp) 2422{ 2423 if (ifp->if_afdata[AF_INET6] == NULL) 2424 return ifp->if_mtu; 2425 2426 return (IN6_LINKMTU(ifp)); 2427} 2428 2429void 2430in6_domifdetach(struct ifnet *ifp, void *aux) 2431{ 2432 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2433 2434 mld_domifdetach(ifp); 2435 scope6_ifdetach(ext->scope6_id); 2436 nd6_ifdetach(ifp, ext->nd_ifinfo); 2437 lltable_free(ext->lltable); 2438 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2439 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2440 free(ext->in6_ifstat, M_IFADDR); 2441 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2442 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2443 free(ext->icmp6_ifstat, M_IFADDR); 2444 free(ext, M_IFADDR); 2445} 2446 2447/* 2448 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2449 * v4 mapped addr or v4 compat addr 2450 */ 2451void 2452in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2453{ 2454 2455 bzero(sin, sizeof(*sin)); 2456 sin->sin_len = sizeof(struct sockaddr_in); 2457 sin->sin_family = AF_INET; 2458 sin->sin_port = sin6->sin6_port; 2459 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2460} 2461 2462/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2463void 2464in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2465{ 2466 bzero(sin6, sizeof(*sin6)); 2467 sin6->sin6_len = sizeof(struct sockaddr_in6); 2468 sin6->sin6_family = AF_INET6; 2469 sin6->sin6_port = sin->sin_port; 2470 sin6->sin6_addr.s6_addr32[0] = 0; 2471 sin6->sin6_addr.s6_addr32[1] = 0; 2472 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2473 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2474} 2475 2476/* Convert sockaddr_in6 into sockaddr_in. */ 2477void 2478in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2479{ 2480 struct sockaddr_in *sin_p; 2481 struct sockaddr_in6 sin6; 2482 2483 /* 2484 * Save original sockaddr_in6 addr and convert it 2485 * to sockaddr_in. 2486 */ 2487 sin6 = *(struct sockaddr_in6 *)nam; 2488 sin_p = (struct sockaddr_in *)nam; 2489 in6_sin6_2_sin(sin_p, &sin6); 2490} 2491 2492/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2493void 2494in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2495{ 2496 struct sockaddr_in *sin_p; 2497 struct sockaddr_in6 *sin6_p; 2498 2499 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2500 sin_p = (struct sockaddr_in *)*nam; 2501 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2502 free(*nam, M_SONAME); 2503 *nam = (struct sockaddr *)sin6_p; 2504} 2505