in6.c revision 329791
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 329791 2018-02-22 02:15:45Z asomers $"); 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 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 681 break; 682 } 683 684 case SIOCDIFADDR_IN6: 685 { 686 struct nd_prefix *pr; 687 688 /* 689 * If the address being deleted is the only one that owns 690 * the corresponding prefix, expire the prefix as well. 691 * XXX: theoretically, we don't have to worry about such 692 * relationship, since we separate the address management 693 * and the prefix management. We do this, however, to provide 694 * as much backward compatibility as possible in terms of 695 * the ioctl operation. 696 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 697 */ 698 pr = ia->ia6_ndpr; 699 in6_purgeaddr(&ia->ia_ifa); 700 if (pr != NULL && pr->ndpr_addrcnt == 0) { 701 ND6_WLOCK(); 702 nd6_prefix_unlink(pr, NULL); 703 ND6_WUNLOCK(); 704 nd6_prefix_del(pr); 705 } 706 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 707 break; 708 } 709 710 default: 711 if (ifp->if_ioctl == NULL) { 712 error = EOPNOTSUPP; 713 goto out; 714 } 715 error = (*ifp->if_ioctl)(ifp, cmd, data); 716 goto out; 717 } 718 719 error = 0; 720out: 721 if (ia != NULL) 722 ifa_free(&ia->ia_ifa); 723 return (error); 724} 725 726 727/* 728 * Join necessary multicast groups. Factored out from in6_update_ifa(). 729 * This entire work should only be done once, for the default FIB. 730 */ 731static int 732in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 733 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 734{ 735 char ip6buf[INET6_ADDRSTRLEN]; 736 struct in6_addr mltaddr; 737 struct in6_multi_mship *imm; 738 int delay, error; 739 740 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 741 742 /* Join solicited multicast addr for new host id. */ 743 bzero(&mltaddr, sizeof(struct in6_addr)); 744 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 745 mltaddr.s6_addr32[2] = htonl(1); 746 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 747 mltaddr.s6_addr8[12] = 0xff; 748 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 749 /* XXX: should not happen */ 750 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 751 goto cleanup; 752 } 753 delay = error = 0; 754 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 755 /* 756 * We need a random delay for DAD on the address being 757 * configured. It also means delaying transmission of the 758 * corresponding MLD report to avoid report collision. 759 * [RFC 4861, Section 6.3.7] 760 */ 761 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 762 } 763 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 764 if (imm == NULL) { 765 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 766 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 767 if_name(ifp), error)); 768 goto cleanup; 769 } 770 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 771 *in6m_sol = imm->i6mm_maddr; 772 773 /* 774 * Join link-local all-nodes address. 775 */ 776 mltaddr = in6addr_linklocal_allnodes; 777 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 778 goto cleanup; /* XXX: should not fail */ 779 780 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 781 if (imm == NULL) { 782 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 783 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 784 if_name(ifp), error)); 785 goto cleanup; 786 } 787 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 788 789 /* 790 * Join node information group address. 791 */ 792 delay = 0; 793 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 794 /* 795 * The spec does not say anything about delay for this group, 796 * but the same logic should apply. 797 */ 798 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 799 } 800 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 801 /* XXX jinmei */ 802 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 803 if (imm == NULL) 804 nd6log((LOG_WARNING, 805 "%s: in6_joingroup failed for %s on %s " 806 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 807 &mltaddr), if_name(ifp), error)); 808 /* XXX not very fatal, go on... */ 809 else 810 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 811 } 812 if (V_icmp6_nodeinfo_oldmcprefix && 813 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 814 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 815 if (imm == NULL) 816 nd6log((LOG_WARNING, 817 "%s: in6_joingroup failed for %s on %s " 818 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 819 &mltaddr), if_name(ifp), error)); 820 /* XXX not very fatal, go on... */ 821 else 822 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 823 } 824 825 /* 826 * Join interface-local all-nodes address. 827 * (ff01::1%ifN, and ff01::%ifN/32) 828 */ 829 mltaddr = in6addr_nodelocal_allnodes; 830 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 831 goto cleanup; /* XXX: should not fail */ 832 833 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 834 if (imm == NULL) { 835 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 836 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 837 &mltaddr), if_name(ifp), error)); 838 goto cleanup; 839 } 840 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 841 842cleanup: 843 return (error); 844} 845 846/* 847 * Update parameters of an IPv6 interface address. 848 * If necessary, a new entry is created and linked into address chains. 849 * This function is separated from in6_control(). 850 */ 851int 852in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 853 struct in6_ifaddr *ia, int flags) 854{ 855 int error, hostIsNew = 0; 856 857 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 858 return (error); 859 860 if (ia == NULL) { 861 hostIsNew = 1; 862 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 863 return (ENOBUFS); 864 } 865 866 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 867 if (error != 0) { 868 if (hostIsNew != 0) { 869 in6_unlink_ifa(ia, ifp); 870 ifa_free(&ia->ia_ifa); 871 } 872 return (error); 873 } 874 875 if (hostIsNew) 876 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 877 878 return (error); 879} 880 881/* 882 * Fill in basic IPv6 address request info. 883 */ 884void 885in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 886 const struct in6_addr *mask) 887{ 888 889 memset(ifra, 0, sizeof(struct in6_aliasreq)); 890 891 ifra->ifra_addr.sin6_family = AF_INET6; 892 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 893 if (addr != NULL) 894 ifra->ifra_addr.sin6_addr = *addr; 895 896 ifra->ifra_prefixmask.sin6_family = AF_INET6; 897 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 898 if (mask != NULL) 899 ifra->ifra_prefixmask.sin6_addr = *mask; 900} 901 902static int 903in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 904 struct in6_ifaddr *ia, int flags) 905{ 906 int plen = -1; 907 struct sockaddr_in6 dst6; 908 struct in6_addrlifetime *lt; 909 char ip6buf[INET6_ADDRSTRLEN]; 910 911 /* Validate parameters */ 912 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 913 return (EINVAL); 914 915 /* 916 * The destination address for a p2p link must have a family 917 * of AF_UNSPEC or AF_INET6. 918 */ 919 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 920 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 921 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 922 return (EAFNOSUPPORT); 923 924 /* 925 * Validate address 926 */ 927 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 928 ifra->ifra_addr.sin6_family != AF_INET6) 929 return (EINVAL); 930 931 /* 932 * validate ifra_prefixmask. don't check sin6_family, netmask 933 * does not carry fields other than sin6_len. 934 */ 935 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 936 return (EINVAL); 937 /* 938 * Because the IPv6 address architecture is classless, we require 939 * users to specify a (non 0) prefix length (mask) for a new address. 940 * We also require the prefix (when specified) mask is valid, and thus 941 * reject a non-consecutive mask. 942 */ 943 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 944 return (EINVAL); 945 if (ifra->ifra_prefixmask.sin6_len != 0) { 946 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 947 (u_char *)&ifra->ifra_prefixmask + 948 ifra->ifra_prefixmask.sin6_len); 949 if (plen <= 0) 950 return (EINVAL); 951 } else { 952 /* 953 * In this case, ia must not be NULL. We just use its prefix 954 * length. 955 */ 956 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 957 } 958 /* 959 * If the destination address on a p2p interface is specified, 960 * and the address is a scoped one, validate/set the scope 961 * zone identifier. 962 */ 963 dst6 = ifra->ifra_dstaddr; 964 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 965 (dst6.sin6_family == AF_INET6)) { 966 struct in6_addr in6_tmp; 967 u_int32_t zoneid; 968 969 in6_tmp = dst6.sin6_addr; 970 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 971 return (EINVAL); /* XXX: should be impossible */ 972 973 if (dst6.sin6_scope_id != 0) { 974 if (dst6.sin6_scope_id != zoneid) 975 return (EINVAL); 976 } else /* user omit to specify the ID. */ 977 dst6.sin6_scope_id = zoneid; 978 979 /* convert into the internal form */ 980 if (sa6_embedscope(&dst6, 0)) 981 return (EINVAL); /* XXX: should be impossible */ 982 } 983 /* Modify original ifra_dstaddr to reflect changes */ 984 ifra->ifra_dstaddr = dst6; 985 986 /* 987 * The destination address can be specified only for a p2p or a 988 * loopback interface. If specified, the corresponding prefix length 989 * must be 128. 990 */ 991 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 992 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 993 /* XXX: noisy message */ 994 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 995 "be specified for a p2p or a loopback IF only\n")); 996 return (EINVAL); 997 } 998 if (plen != 128) { 999 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1000 "be 128 when dstaddr is specified\n")); 1001 return (EINVAL); 1002 } 1003 } 1004 /* lifetime consistency check */ 1005 lt = &ifra->ifra_lifetime; 1006 if (lt->ia6t_pltime > lt->ia6t_vltime) 1007 return (EINVAL); 1008 if (lt->ia6t_vltime == 0) { 1009 /* 1010 * the following log might be noisy, but this is a typical 1011 * configuration mistake or a tool's bug. 1012 */ 1013 nd6log((LOG_INFO, 1014 "in6_update_ifa: valid lifetime is 0 for %s\n", 1015 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1016 1017 if (ia == NULL) 1018 return (0); /* there's nothing to do */ 1019 } 1020 1021 /* Check prefix mask */ 1022 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1023 /* 1024 * We prohibit changing the prefix length of an existing 1025 * address, because 1026 * + such an operation should be rare in IPv6, and 1027 * + the operation would confuse prefix management. 1028 */ 1029 if (ia->ia_prefixmask.sin6_len != 0 && 1030 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1031 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1032 "of an existing %s address should not be changed\n", 1033 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1034 1035 return (EINVAL); 1036 } 1037 } 1038 1039 return (0); 1040} 1041 1042 1043/* 1044 * Allocate a new ifaddr and link it into chains. 1045 */ 1046static struct in6_ifaddr * 1047in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1048{ 1049 struct in6_ifaddr *ia; 1050 1051 /* 1052 * When in6_alloc_ifa() is called in a process of a received 1053 * RA, it is called under an interrupt context. So, we should 1054 * call malloc with M_NOWAIT. 1055 */ 1056 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1057 if (ia == NULL) 1058 return (NULL); 1059 LIST_INIT(&ia->ia6_memberships); 1060 /* Initialize the address and masks, and put time stamp */ 1061 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1062 ia->ia_addr.sin6_family = AF_INET6; 1063 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1064 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1065 ia->ia_addr = ifra->ifra_addr; 1066 ia->ia6_createtime = time_uptime; 1067 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1068 /* 1069 * Some functions expect that ifa_dstaddr is not 1070 * NULL for p2p interfaces. 1071 */ 1072 ia->ia_ifa.ifa_dstaddr = 1073 (struct sockaddr *)&ia->ia_dstaddr; 1074 } else { 1075 ia->ia_ifa.ifa_dstaddr = NULL; 1076 } 1077 1078 /* set prefix mask if any */ 1079 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1080 if (ifra->ifra_prefixmask.sin6_len != 0) { 1081 ia->ia_prefixmask.sin6_family = AF_INET6; 1082 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1083 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1084 } 1085 1086 ia->ia_ifp = ifp; 1087 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1088 IF_ADDR_WLOCK(ifp); 1089 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1090 IF_ADDR_WUNLOCK(ifp); 1091 1092 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1093 IN6_IFADDR_WLOCK(); 1094 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1095 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1096 IN6_IFADDR_WUNLOCK(); 1097 1098 return (ia); 1099} 1100 1101/* 1102 * Update/configure interface address parameters: 1103 * 1104 * 1) Update lifetime 1105 * 2) Update interface metric ad flags 1106 * 3) Notify other subsystems 1107 */ 1108static int 1109in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1110 struct in6_ifaddr *ia, int hostIsNew, int flags) 1111{ 1112 int error; 1113 1114 /* update timestamp */ 1115 ia->ia6_updatetime = time_uptime; 1116 1117 /* 1118 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1119 * to see if the address is deprecated or invalidated, but initialize 1120 * these members for applications. 1121 */ 1122 ia->ia6_lifetime = ifra->ifra_lifetime; 1123 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1124 ia->ia6_lifetime.ia6t_expire = 1125 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1126 } else 1127 ia->ia6_lifetime.ia6t_expire = 0; 1128 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1129 ia->ia6_lifetime.ia6t_preferred = 1130 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1131 } else 1132 ia->ia6_lifetime.ia6t_preferred = 0; 1133 1134 /* 1135 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1136 * userland, make it deprecated. 1137 */ 1138 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1139 ia->ia6_lifetime.ia6t_pltime = 0; 1140 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1141 } 1142 1143 /* 1144 * configure address flags. 1145 */ 1146 ia->ia6_flags = ifra->ifra_flags; 1147 1148 /* 1149 * Make the address tentative before joining multicast addresses, 1150 * so that corresponding MLD responses would not have a tentative 1151 * source address. 1152 */ 1153 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1154 1155 /* 1156 * DAD should be performed for an new address or addresses on 1157 * an interface with ND6_IFF_IFDISABLED. 1158 */ 1159 if (in6if_do_dad(ifp) && 1160 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1161 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1162 1163 /* notify other subsystems */ 1164 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1165 1166 return (error); 1167} 1168 1169/* 1170 * Do link-level ifa job: 1171 * 1) Add lle entry for added address 1172 * 2) Notifies routing socket users about new address 1173 * 3) join appropriate multicast group 1174 * 4) start DAD if enabled 1175 */ 1176static int 1177in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1178 struct in6_ifaddr *ia, int flags) 1179{ 1180 struct in6_multi *in6m_sol; 1181 int error = 0; 1182 1183 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1184 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1185 in6_purgeaddr(&ia->ia_ifa); 1186 ifa_free(&ia->ia_ifa); 1187 return (error); 1188 } 1189 1190 /* Join necessary multicast groups. */ 1191 in6m_sol = NULL; 1192 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1193 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1194 if (error != 0) { 1195 in6_purgeaddr(&ia->ia_ifa); 1196 ifa_free(&ia->ia_ifa); 1197 return (error); 1198 } 1199 } 1200 1201 /* Perform DAD, if the address is TENTATIVE. */ 1202 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1203 int delay, mindelay, maxdelay; 1204 1205 delay = 0; 1206 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1207 /* 1208 * We need to impose a delay before sending an NS 1209 * for DAD. Check if we also needed a delay for the 1210 * corresponding MLD message. If we did, the delay 1211 * should be larger than the MLD delay (this could be 1212 * relaxed a bit, but this simple logic is at least 1213 * safe). 1214 * XXX: Break data hiding guidelines and look at 1215 * state for the solicited multicast group. 1216 */ 1217 mindelay = 0; 1218 if (in6m_sol != NULL && 1219 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1220 mindelay = in6m_sol->in6m_timer; 1221 } 1222 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1223 if (maxdelay - mindelay == 0) 1224 delay = 0; 1225 else { 1226 delay = 1227 (arc4random() % (maxdelay - mindelay)) + 1228 mindelay; 1229 } 1230 } 1231 nd6_dad_start((struct ifaddr *)ia, delay); 1232 } 1233 1234 in6_newaddrmsg(ia, RTM_ADD); 1235 ifa_free(&ia->ia_ifa); 1236 return (error); 1237} 1238 1239void 1240in6_purgeaddr(struct ifaddr *ifa) 1241{ 1242 struct ifnet *ifp = ifa->ifa_ifp; 1243 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1244 struct in6_multi_mship *imm; 1245 int plen, error; 1246 1247 if (ifa->ifa_carp) 1248 (*carp_detach_p)(ifa); 1249 1250 /* 1251 * Remove the loopback route to the interface address. 1252 * The check for the current setting of "nd6_useloopback" 1253 * is not needed. 1254 */ 1255 if (ia->ia_flags & IFA_RTSELF) { 1256 error = ifa_del_loopback_route((struct ifaddr *)ia, 1257 (struct sockaddr *)&ia->ia_addr); 1258 if (error == 0) 1259 ia->ia_flags &= ~IFA_RTSELF; 1260 } 1261 1262 /* stop DAD processing */ 1263 nd6_dad_stop(ifa); 1264 1265 /* Leave multicast groups. */ 1266 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1267 LIST_REMOVE(imm, i6mm_chain); 1268 in6_leavegroup(imm); 1269 } 1270 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1271 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1272 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1273 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1274 if (error != 0) 1275 log(LOG_INFO, "%s: err=%d, destination address delete " 1276 "failed\n", __func__, error); 1277 ia->ia_flags &= ~IFA_ROUTE; 1278 } 1279 1280 in6_newaddrmsg(ia, RTM_DELETE); 1281 in6_unlink_ifa(ia, ifp); 1282} 1283 1284static void 1285in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1286{ 1287 char ip6buf[INET6_ADDRSTRLEN]; 1288 int remove_lle; 1289 1290 IF_ADDR_WLOCK(ifp); 1291 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1292 IF_ADDR_WUNLOCK(ifp); 1293 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1294 1295 /* 1296 * Defer the release of what might be the last reference to the 1297 * in6_ifaddr so that it can't be freed before the remainder of the 1298 * cleanup. 1299 */ 1300 IN6_IFADDR_WLOCK(); 1301 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1302 LIST_REMOVE(ia, ia6_hash); 1303 IN6_IFADDR_WUNLOCK(); 1304 1305 /* 1306 * Release the reference to the base prefix. There should be a 1307 * positive reference. 1308 */ 1309 remove_lle = 0; 1310 if (ia->ia6_ndpr == NULL) { 1311 nd6log((LOG_NOTICE, 1312 "in6_unlink_ifa: autoconf'ed address " 1313 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1314 } else { 1315 ia->ia6_ndpr->ndpr_addrcnt--; 1316 /* Do not delete lles within prefix if refcont != 0 */ 1317 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1318 remove_lle = 1; 1319 ia->ia6_ndpr = NULL; 1320 } 1321 1322 nd6_rem_ifa_lle(ia, remove_lle); 1323 1324 /* 1325 * Also, if the address being removed is autoconf'ed, call 1326 * pfxlist_onlink_check() since the release might affect the status of 1327 * other (detached) addresses. 1328 */ 1329 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1330 pfxlist_onlink_check(); 1331 } 1332 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1333} 1334 1335/* 1336 * Notifies other subsystems about address change/arrival: 1337 * 1) Notifies device handler on the first IPv6 address assignment 1338 * 2) Handle routing table changes for P2P links and route 1339 * 3) Handle routing table changes for address host route 1340 */ 1341static int 1342in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1343 struct in6_aliasreq *ifra, int hostIsNew) 1344{ 1345 int error = 0, plen, ifacount = 0; 1346 struct ifaddr *ifa; 1347 struct sockaddr_in6 *pdst; 1348 char ip6buf[INET6_ADDRSTRLEN]; 1349 1350 /* 1351 * Give the interface a chance to initialize 1352 * if this is its first address, 1353 */ 1354 if (hostIsNew != 0) { 1355 IF_ADDR_RLOCK(ifp); 1356 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1357 if (ifa->ifa_addr->sa_family != AF_INET6) 1358 continue; 1359 ifacount++; 1360 } 1361 IF_ADDR_RUNLOCK(ifp); 1362 } 1363 1364 if (ifacount <= 1 && ifp->if_ioctl) { 1365 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1366 if (error) 1367 return (error); 1368 } 1369 1370 /* 1371 * If a new destination address is specified, scrub the old one and 1372 * install the new destination. Note that the interface must be 1373 * p2p or loopback. 1374 */ 1375 pdst = &ifra->ifra_dstaddr; 1376 if (pdst->sin6_family == AF_INET6 && 1377 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1378 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1379 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1380 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1381 "remove a route to the old destination: %s\n", 1382 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1383 /* proceed anyway... */ 1384 } else 1385 ia->ia_flags &= ~IFA_ROUTE; 1386 ia->ia_dstaddr = *pdst; 1387 } 1388 1389 /* 1390 * If a new destination address is specified for a point-to-point 1391 * interface, install a route to the destination as an interface 1392 * direct route. 1393 * XXX: the logic below rejects assigning multiple addresses on a p2p 1394 * interface that share the same destination. 1395 */ 1396 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1397 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1398 ia->ia_dstaddr.sin6_family == AF_INET6) { 1399 int rtflags = RTF_UP | RTF_HOST; 1400 /* 1401 * Handle the case for ::1 . 1402 */ 1403 if (ifp->if_flags & IFF_LOOPBACK) 1404 ia->ia_flags |= IFA_RTSELF; 1405 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1406 if (error) 1407 return (error); 1408 ia->ia_flags |= IFA_ROUTE; 1409 } 1410 1411 /* 1412 * add a loopback route to self if not exists 1413 */ 1414 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1415 error = ifa_add_loopback_route((struct ifaddr *)ia, 1416 (struct sockaddr *)&ia->ia_addr); 1417 if (error == 0) 1418 ia->ia_flags |= IFA_RTSELF; 1419 } 1420 1421 return (error); 1422} 1423 1424/* 1425 * Find an IPv6 interface link-local address specific to an interface. 1426 * ifaddr is returned referenced. 1427 */ 1428struct in6_ifaddr * 1429in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1430{ 1431 struct ifaddr *ifa; 1432 1433 IF_ADDR_RLOCK(ifp); 1434 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1435 if (ifa->ifa_addr->sa_family != AF_INET6) 1436 continue; 1437 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1438 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1439 ignoreflags) != 0) 1440 continue; 1441 ifa_ref(ifa); 1442 break; 1443 } 1444 } 1445 IF_ADDR_RUNLOCK(ifp); 1446 1447 return ((struct in6_ifaddr *)ifa); 1448} 1449 1450 1451/* 1452 * find the interface address corresponding to a given IPv6 address. 1453 * ifaddr is returned referenced. 1454 */ 1455struct in6_ifaddr * 1456in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1457{ 1458 struct rm_priotracker in6_ifa_tracker; 1459 struct in6_ifaddr *ia; 1460 1461 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1462 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1463 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1464 if (zoneid != 0 && 1465 zoneid != ia->ia_addr.sin6_scope_id) 1466 continue; 1467 ifa_ref(&ia->ia_ifa); 1468 break; 1469 } 1470 } 1471 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1472 return (ia); 1473} 1474 1475/* 1476 * find the internet address corresponding to a given interface and address. 1477 * ifaddr is returned referenced. 1478 */ 1479struct in6_ifaddr * 1480in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1481{ 1482 struct ifaddr *ifa; 1483 1484 IF_ADDR_RLOCK(ifp); 1485 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1486 if (ifa->ifa_addr->sa_family != AF_INET6) 1487 continue; 1488 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1489 ifa_ref(ifa); 1490 break; 1491 } 1492 } 1493 IF_ADDR_RUNLOCK(ifp); 1494 1495 return ((struct in6_ifaddr *)ifa); 1496} 1497 1498/* 1499 * Find a link-local scoped address on ifp and return it if any. 1500 */ 1501struct in6_ifaddr * 1502in6ifa_llaonifp(struct ifnet *ifp) 1503{ 1504 struct sockaddr_in6 *sin6; 1505 struct ifaddr *ifa; 1506 1507 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1508 return (NULL); 1509 IF_ADDR_RLOCK(ifp); 1510 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1511 if (ifa->ifa_addr->sa_family != AF_INET6) 1512 continue; 1513 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1514 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1515 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1516 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1517 break; 1518 } 1519 IF_ADDR_RUNLOCK(ifp); 1520 1521 return ((struct in6_ifaddr *)ifa); 1522} 1523 1524/* 1525 * Convert IP6 address to printable (loggable) representation. Caller 1526 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1527 */ 1528static char digits[] = "0123456789abcdef"; 1529char * 1530ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1531{ 1532 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1533 char *cp; 1534 const u_int16_t *a = (const u_int16_t *)addr; 1535 const u_int8_t *d; 1536 int dcolon = 0, zero = 0; 1537 1538 cp = ip6buf; 1539 1540 for (i = 0; i < 8; i++) { 1541 if (*(a + i) == 0) { 1542 cnt++; 1543 if (cnt == 1) 1544 idx = i; 1545 } 1546 else if (maxcnt < cnt) { 1547 maxcnt = cnt; 1548 index = idx; 1549 cnt = 0; 1550 } 1551 } 1552 if (maxcnt < cnt) { 1553 maxcnt = cnt; 1554 index = idx; 1555 } 1556 1557 for (i = 0; i < 8; i++) { 1558 if (dcolon == 1) { 1559 if (*a == 0) { 1560 if (i == 7) 1561 *cp++ = ':'; 1562 a++; 1563 continue; 1564 } else 1565 dcolon = 2; 1566 } 1567 if (*a == 0) { 1568 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1569 if (i == 0) 1570 *cp++ = ':'; 1571 *cp++ = ':'; 1572 dcolon = 1; 1573 } else { 1574 *cp++ = '0'; 1575 *cp++ = ':'; 1576 } 1577 a++; 1578 continue; 1579 } 1580 d = (const u_char *)a; 1581 /* Try to eliminate leading zeros in printout like in :0001. */ 1582 zero = 1; 1583 *cp = digits[*d >> 4]; 1584 if (*cp != '0') { 1585 zero = 0; 1586 cp++; 1587 } 1588 *cp = digits[*d++ & 0xf]; 1589 if (zero == 0 || (*cp != '0')) { 1590 zero = 0; 1591 cp++; 1592 } 1593 *cp = digits[*d >> 4]; 1594 if (zero == 0 || (*cp != '0')) { 1595 zero = 0; 1596 cp++; 1597 } 1598 *cp++ = digits[*d & 0xf]; 1599 *cp++ = ':'; 1600 a++; 1601 } 1602 *--cp = '\0'; 1603 return (ip6buf); 1604} 1605 1606int 1607in6_localaddr(struct in6_addr *in6) 1608{ 1609 struct rm_priotracker in6_ifa_tracker; 1610 struct in6_ifaddr *ia; 1611 1612 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1613 return 1; 1614 1615 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1616 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1617 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1618 &ia->ia_prefixmask.sin6_addr)) { 1619 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1620 return 1; 1621 } 1622 } 1623 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1624 1625 return (0); 1626} 1627 1628/* 1629 * Return 1 if an internet address is for the local host and configured 1630 * on one of its interfaces. 1631 */ 1632int 1633in6_localip(struct in6_addr *in6) 1634{ 1635 struct rm_priotracker in6_ifa_tracker; 1636 struct in6_ifaddr *ia; 1637 1638 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1639 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1640 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1641 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1642 return (1); 1643 } 1644 } 1645 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1646 return (0); 1647} 1648 1649/* 1650 * Return 1 if an internet address is configured on an interface. 1651 */ 1652int 1653in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1654{ 1655 struct in6_addr in6; 1656 struct ifaddr *ifa; 1657 struct in6_ifaddr *ia6; 1658 1659 in6 = *addr; 1660 if (in6_clearscope(&in6)) 1661 return (0); 1662 in6_setscope(&in6, ifp, NULL); 1663 1664 IF_ADDR_RLOCK(ifp); 1665 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1666 if (ifa->ifa_addr->sa_family != AF_INET6) 1667 continue; 1668 ia6 = (struct in6_ifaddr *)ifa; 1669 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1670 IF_ADDR_RUNLOCK(ifp); 1671 return (1); 1672 } 1673 } 1674 IF_ADDR_RUNLOCK(ifp); 1675 1676 return (0); 1677} 1678 1679int 1680in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1681{ 1682 struct rm_priotracker in6_ifa_tracker; 1683 struct in6_ifaddr *ia; 1684 1685 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1686 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1687 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1688 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1689 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1690 return (1); /* true */ 1691 } 1692 break; 1693 } 1694 } 1695 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1696 1697 return (0); /* false */ 1698} 1699 1700/* 1701 * return length of part which dst and src are equal 1702 * hard coding... 1703 */ 1704int 1705in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1706{ 1707 int match = 0; 1708 u_char *s = (u_char *)src, *d = (u_char *)dst; 1709 u_char *lim = s + 16, r; 1710 1711 while (s < lim) 1712 if ((r = (*d++ ^ *s++)) != 0) { 1713 while (r < 128) { 1714 match++; 1715 r <<= 1; 1716 } 1717 break; 1718 } else 1719 match += 8; 1720 return match; 1721} 1722 1723/* XXX: to be scope conscious */ 1724int 1725in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1726{ 1727 int bytelen, bitlen; 1728 1729 /* sanity check */ 1730 if (0 > len || len > 128) { 1731 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1732 len); 1733 return (0); 1734 } 1735 1736 bytelen = len / 8; 1737 bitlen = len % 8; 1738 1739 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1740 return (0); 1741 if (bitlen != 0 && 1742 p1->s6_addr[bytelen] >> (8 - bitlen) != 1743 p2->s6_addr[bytelen] >> (8 - bitlen)) 1744 return (0); 1745 1746 return (1); 1747} 1748 1749void 1750in6_prefixlen2mask(struct in6_addr *maskp, int len) 1751{ 1752 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1753 int bytelen, bitlen, i; 1754 1755 /* sanity check */ 1756 if (0 > len || len > 128) { 1757 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1758 len); 1759 return; 1760 } 1761 1762 bzero(maskp, sizeof(*maskp)); 1763 bytelen = len / 8; 1764 bitlen = len % 8; 1765 for (i = 0; i < bytelen; i++) 1766 maskp->s6_addr[i] = 0xff; 1767 if (bitlen) 1768 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1769} 1770 1771/* 1772 * return the best address out of the same scope. if no address was 1773 * found, return the first valid address from designated IF. 1774 */ 1775struct in6_ifaddr * 1776in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1777{ 1778 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1779 struct ifaddr *ifa; 1780 struct in6_ifaddr *besta = NULL; 1781 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1782 1783 dep[0] = dep[1] = NULL; 1784 1785 /* 1786 * We first look for addresses in the same scope. 1787 * If there is one, return it. 1788 * If two or more, return one which matches the dst longest. 1789 * If none, return one of global addresses assigned other ifs. 1790 */ 1791 IF_ADDR_RLOCK(ifp); 1792 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1793 if (ifa->ifa_addr->sa_family != AF_INET6) 1794 continue; 1795 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1796 continue; /* XXX: is there any case to allow anycast? */ 1797 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1798 continue; /* don't use this interface */ 1799 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1800 continue; 1801 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1802 if (V_ip6_use_deprecated) 1803 dep[0] = (struct in6_ifaddr *)ifa; 1804 continue; 1805 } 1806 1807 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1808 /* 1809 * call in6_matchlen() as few as possible 1810 */ 1811 if (besta) { 1812 if (blen == -1) 1813 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1814 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1815 if (tlen > blen) { 1816 blen = tlen; 1817 besta = (struct in6_ifaddr *)ifa; 1818 } 1819 } else 1820 besta = (struct in6_ifaddr *)ifa; 1821 } 1822 } 1823 if (besta) { 1824 ifa_ref(&besta->ia_ifa); 1825 IF_ADDR_RUNLOCK(ifp); 1826 return (besta); 1827 } 1828 1829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1830 if (ifa->ifa_addr->sa_family != AF_INET6) 1831 continue; 1832 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1833 continue; /* XXX: is there any case to allow anycast? */ 1834 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1835 continue; /* don't use this interface */ 1836 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1837 continue; 1838 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1839 if (V_ip6_use_deprecated) 1840 dep[1] = (struct in6_ifaddr *)ifa; 1841 continue; 1842 } 1843 1844 if (ifa != NULL) 1845 ifa_ref(ifa); 1846 IF_ADDR_RUNLOCK(ifp); 1847 return (struct in6_ifaddr *)ifa; 1848 } 1849 1850 /* use the last-resort values, that are, deprecated addresses */ 1851 if (dep[0]) { 1852 ifa_ref((struct ifaddr *)dep[0]); 1853 IF_ADDR_RUNLOCK(ifp); 1854 return dep[0]; 1855 } 1856 if (dep[1]) { 1857 ifa_ref((struct ifaddr *)dep[1]); 1858 IF_ADDR_RUNLOCK(ifp); 1859 return dep[1]; 1860 } 1861 1862 IF_ADDR_RUNLOCK(ifp); 1863 return NULL; 1864} 1865 1866/* 1867 * perform DAD when interface becomes IFF_UP. 1868 */ 1869void 1870in6_if_up(struct ifnet *ifp) 1871{ 1872 struct ifaddr *ifa; 1873 struct in6_ifaddr *ia; 1874 1875 IF_ADDR_RLOCK(ifp); 1876 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1877 if (ifa->ifa_addr->sa_family != AF_INET6) 1878 continue; 1879 ia = (struct in6_ifaddr *)ifa; 1880 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1881 /* 1882 * The TENTATIVE flag was likely set by hand 1883 * beforehand, implicitly indicating the need for DAD. 1884 * We may be able to skip the random delay in this 1885 * case, but we impose delays just in case. 1886 */ 1887 nd6_dad_start(ifa, 1888 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1889 } 1890 } 1891 IF_ADDR_RUNLOCK(ifp); 1892 1893 /* 1894 * special cases, like 6to4, are handled in in6_ifattach 1895 */ 1896 in6_ifattach(ifp, NULL); 1897} 1898 1899int 1900in6if_do_dad(struct ifnet *ifp) 1901{ 1902 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1903 return (0); 1904 1905 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1906 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1907 return (0); 1908 1909 /* 1910 * Our DAD routine requires the interface up and running. 1911 * However, some interfaces can be up before the RUNNING 1912 * status. Additionally, users may try to assign addresses 1913 * before the interface becomes up (or running). 1914 * This function returns EAGAIN in that case. 1915 * The caller should mark "tentative" on the address instead of 1916 * performing DAD immediately. 1917 */ 1918 if (!((ifp->if_flags & IFF_UP) && 1919 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1920 return (EAGAIN); 1921 1922 return (1); 1923} 1924 1925/* 1926 * Calculate max IPv6 MTU through all the interfaces and store it 1927 * to in6_maxmtu. 1928 */ 1929void 1930in6_setmaxmtu(void) 1931{ 1932 unsigned long maxmtu = 0; 1933 struct ifnet *ifp; 1934 1935 IFNET_RLOCK_NOSLEEP(); 1936 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1937 /* this function can be called during ifnet initialization */ 1938 if (!ifp->if_afdata[AF_INET6]) 1939 continue; 1940 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1941 IN6_LINKMTU(ifp) > maxmtu) 1942 maxmtu = IN6_LINKMTU(ifp); 1943 } 1944 IFNET_RUNLOCK_NOSLEEP(); 1945 if (maxmtu) /* update only when maxmtu is positive */ 1946 V_in6_maxmtu = maxmtu; 1947} 1948 1949/* 1950 * Provide the length of interface identifiers to be used for the link attached 1951 * to the given interface. The length should be defined in "IPv6 over 1952 * xxx-link" document. Note that address architecture might also define 1953 * the length for a particular set of address prefixes, regardless of the 1954 * link type. As clarified in rfc2462bis, those two definitions should be 1955 * consistent, and those really are as of August 2004. 1956 */ 1957int 1958in6_if2idlen(struct ifnet *ifp) 1959{ 1960 switch (ifp->if_type) { 1961 case IFT_ETHER: /* RFC2464 */ 1962 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 1963 case IFT_L2VLAN: /* ditto */ 1964 case IFT_IEEE80211: /* ditto */ 1965 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 1966 case IFT_INFINIBAND: 1967 return (64); 1968 case IFT_FDDI: /* RFC2467 */ 1969 return (64); 1970 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 1971 return (64); 1972 case IFT_PPP: /* RFC2472 */ 1973 return (64); 1974 case IFT_ARCNET: /* RFC2497 */ 1975 return (64); 1976 case IFT_FRELAY: /* RFC2590 */ 1977 return (64); 1978 case IFT_IEEE1394: /* RFC3146 */ 1979 return (64); 1980 case IFT_GIF: 1981 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 1982 case IFT_LOOP: 1983 return (64); /* XXX: is this really correct? */ 1984 default: 1985 /* 1986 * Unknown link type: 1987 * It might be controversial to use the today's common constant 1988 * of 64 for these cases unconditionally. For full compliance, 1989 * we should return an error in this case. On the other hand, 1990 * if we simply miss the standard for the link type or a new 1991 * standard is defined for a new link type, the IFID length 1992 * is very likely to be the common constant. As a compromise, 1993 * we always use the constant, but make an explicit notice 1994 * indicating the "unknown" case. 1995 */ 1996 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 1997 return (64); 1998 } 1999} 2000 2001#include <sys/sysctl.h> 2002 2003struct in6_llentry { 2004 struct llentry base; 2005}; 2006 2007#define IN6_LLTBL_DEFAULT_HSIZE 32 2008#define IN6_LLTBL_HASH(k, h) \ 2009 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2010 2011/* 2012 * Do actual deallocation of @lle. 2013 */ 2014static void 2015in6_lltable_destroy_lle_unlocked(struct llentry *lle) 2016{ 2017 2018 LLE_LOCK_DESTROY(lle); 2019 LLE_REQ_DESTROY(lle); 2020 free(lle, M_LLTABLE); 2021} 2022 2023/* 2024 * Called by LLE_FREE_LOCKED when number of references 2025 * drops to zero. 2026 */ 2027static void 2028in6_lltable_destroy_lle(struct llentry *lle) 2029{ 2030 2031 LLE_WUNLOCK(lle); 2032 in6_lltable_destroy_lle_unlocked(lle); 2033} 2034 2035static struct llentry * 2036in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2037{ 2038 struct in6_llentry *lle; 2039 2040 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2041 if (lle == NULL) /* NB: caller generates msg */ 2042 return NULL; 2043 2044 lle->base.r_l3addr.addr6 = *addr6; 2045 lle->base.lle_refcnt = 1; 2046 lle->base.lle_free = in6_lltable_destroy_lle; 2047 LLE_LOCK_INIT(&lle->base); 2048 LLE_REQ_INIT(&lle->base); 2049 callout_init(&lle->base.lle_timer, 1); 2050 2051 return (&lle->base); 2052} 2053 2054static int 2055in6_lltable_match_prefix(const struct sockaddr *saddr, 2056 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2057{ 2058 const struct in6_addr *addr, *mask, *lle_addr; 2059 2060 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2061 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2062 lle_addr = &lle->r_l3addr.addr6; 2063 2064 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2065 return (0); 2066 2067 if (lle->la_flags & LLE_IFADDR) { 2068 2069 /* 2070 * Delete LLE_IFADDR records IFF address & flag matches. 2071 * Note that addr is the interface address within prefix 2072 * being matched. 2073 */ 2074 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2075 (flags & LLE_STATIC) != 0) 2076 return (1); 2077 return (0); 2078 } 2079 2080 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2081 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2082 return (1); 2083 2084 return (0); 2085} 2086 2087static void 2088in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2089{ 2090 struct ifnet *ifp; 2091 2092 LLE_WLOCK_ASSERT(lle); 2093 KASSERT(llt != NULL, ("lltable is NULL")); 2094 2095 /* Unlink entry from table */ 2096 if ((lle->la_flags & LLE_LINKED) != 0) { 2097 2098 ifp = llt->llt_ifp; 2099 IF_AFDATA_WLOCK_ASSERT(ifp); 2100 lltable_unlink_entry(llt, lle); 2101 } 2102 2103 if (callout_stop(&lle->lle_timer) > 0) 2104 LLE_REMREF(lle); 2105 2106 llentry_free(lle); 2107} 2108 2109static int 2110in6_lltable_rtcheck(struct ifnet *ifp, 2111 u_int flags, 2112 const struct sockaddr *l3addr) 2113{ 2114 const struct sockaddr_in6 *sin6; 2115 struct nhop6_basic nh6; 2116 struct in6_addr dst; 2117 uint32_t scopeid; 2118 int error; 2119 char ip6buf[INET6_ADDRSTRLEN]; 2120 int fibnum; 2121 2122 KASSERT(l3addr->sa_family == AF_INET6, 2123 ("sin_family %d", l3addr->sa_family)); 2124 2125 sin6 = (const struct sockaddr_in6 *)l3addr; 2126 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2127 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2128 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6); 2129 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2130 struct ifaddr *ifa; 2131 /* 2132 * Create an ND6 cache for an IPv6 neighbor 2133 * that is not covered by our own prefix. 2134 */ 2135 ifa = ifaof_ifpforaddr(l3addr, ifp); 2136 if (ifa != NULL) { 2137 ifa_free(ifa); 2138 return 0; 2139 } 2140 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2141 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2142 return EINVAL; 2143 } 2144 return 0; 2145} 2146 2147static inline uint32_t 2148in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2149{ 2150 2151 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2152} 2153 2154static uint32_t 2155in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2156{ 2157 2158 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2159} 2160 2161static void 2162in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2163{ 2164 struct sockaddr_in6 *sin6; 2165 2166 sin6 = (struct sockaddr_in6 *)sa; 2167 bzero(sin6, sizeof(*sin6)); 2168 sin6->sin6_family = AF_INET6; 2169 sin6->sin6_len = sizeof(*sin6); 2170 sin6->sin6_addr = lle->r_l3addr.addr6; 2171} 2172 2173static inline struct llentry * 2174in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2175{ 2176 struct llentry *lle; 2177 struct llentries *lleh; 2178 u_int hashidx; 2179 2180 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2181 lleh = &llt->lle_head[hashidx]; 2182 LIST_FOREACH(lle, lleh, lle_next) { 2183 if (lle->la_flags & LLE_DELETED) 2184 continue; 2185 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2186 break; 2187 } 2188 2189 return (lle); 2190} 2191 2192static void 2193in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2194{ 2195 2196 lle->la_flags |= LLE_DELETED; 2197 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2198#ifdef DIAGNOSTIC 2199 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2200#endif 2201 llentry_free(lle); 2202} 2203 2204static struct llentry * 2205in6_lltable_alloc(struct lltable *llt, u_int flags, 2206 const struct sockaddr *l3addr) 2207{ 2208 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2209 struct ifnet *ifp = llt->llt_ifp; 2210 struct llentry *lle; 2211 char linkhdr[LLE_MAX_LINKHDR]; 2212 size_t linkhdrsize; 2213 int lladdr_off; 2214 2215 KASSERT(l3addr->sa_family == AF_INET6, 2216 ("sin_family %d", l3addr->sa_family)); 2217 2218 /* 2219 * A route that covers the given address must have 2220 * been installed 1st because we are doing a resolution, 2221 * verify this. 2222 */ 2223 if (!(flags & LLE_IFADDR) && 2224 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2225 return (NULL); 2226 2227 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2228 if (lle == NULL) { 2229 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2230 return (NULL); 2231 } 2232 lle->la_flags = flags; 2233 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2234 linkhdrsize = LLE_MAX_LINKHDR; 2235 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2236 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2237 in6_lltable_destroy_lle_unlocked(lle); 2238 return (NULL); 2239 } 2240 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2241 lladdr_off); 2242 lle->la_flags |= LLE_STATIC; 2243 } 2244 2245 if ((lle->la_flags & LLE_STATIC) != 0) 2246 lle->ln_state = ND6_LLINFO_REACHABLE; 2247 2248 return (lle); 2249} 2250 2251static struct llentry * 2252in6_lltable_lookup(struct lltable *llt, u_int flags, 2253 const struct sockaddr *l3addr) 2254{ 2255 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2256 struct llentry *lle; 2257 2258 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2259 KASSERT(l3addr->sa_family == AF_INET6, 2260 ("sin_family %d", l3addr->sa_family)); 2261 2262 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2263 2264 if (lle == NULL) 2265 return (NULL); 2266 2267 KASSERT((flags & (LLE_UNLOCKED|LLE_EXCLUSIVE)) != 2268 (LLE_UNLOCKED|LLE_EXCLUSIVE),("wrong lle request flags: 0x%X", 2269 flags)); 2270 2271 if (flags & LLE_UNLOCKED) 2272 return (lle); 2273 2274 if (flags & LLE_EXCLUSIVE) 2275 LLE_WLOCK(lle); 2276 else 2277 LLE_RLOCK(lle); 2278 return (lle); 2279} 2280 2281static int 2282in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2283 struct sysctl_req *wr) 2284{ 2285 struct ifnet *ifp = llt->llt_ifp; 2286 /* XXX stack use */ 2287 struct { 2288 struct rt_msghdr rtm; 2289 struct sockaddr_in6 sin6; 2290 /* 2291 * ndp.c assumes that sdl is word aligned 2292 */ 2293#ifdef __LP64__ 2294 uint32_t pad; 2295#endif 2296 struct sockaddr_dl sdl; 2297 } ndpc; 2298 struct sockaddr_dl *sdl; 2299 int error; 2300 2301 bzero(&ndpc, sizeof(ndpc)); 2302 /* skip deleted entries */ 2303 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2304 return (0); 2305 /* Skip if jailed and not a valid IP of the prison. */ 2306 lltable_fill_sa_entry(lle, 2307 (struct sockaddr *)&ndpc.sin6); 2308 if (prison_if(wr->td->td_ucred, 2309 (struct sockaddr *)&ndpc.sin6) != 0) 2310 return (0); 2311 /* 2312 * produce a msg made of: 2313 * struct rt_msghdr; 2314 * struct sockaddr_in6 (IPv6) 2315 * struct sockaddr_dl; 2316 */ 2317 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2318 ndpc.rtm.rtm_version = RTM_VERSION; 2319 ndpc.rtm.rtm_type = RTM_GET; 2320 ndpc.rtm.rtm_flags = RTF_UP; 2321 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2322 if (V_deembed_scopeid) 2323 sa6_recoverscope(&ndpc.sin6); 2324 2325 /* publish */ 2326 if (lle->la_flags & LLE_PUB) 2327 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2328 2329 sdl = &ndpc.sdl; 2330 sdl->sdl_family = AF_LINK; 2331 sdl->sdl_len = sizeof(*sdl); 2332 sdl->sdl_index = ifp->if_index; 2333 sdl->sdl_type = ifp->if_type; 2334 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2335 sdl->sdl_alen = ifp->if_addrlen; 2336 bcopy(lle->ll_addr, LLADDR(sdl), 2337 ifp->if_addrlen); 2338 } else { 2339 sdl->sdl_alen = 0; 2340 bzero(LLADDR(sdl), ifp->if_addrlen); 2341 } 2342 if (lle->la_expire != 0) 2343 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2344 lle->lle_remtime / hz + 2345 time_second - time_uptime; 2346 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2347 if (lle->la_flags & LLE_STATIC) 2348 ndpc.rtm.rtm_flags |= RTF_STATIC; 2349 if (lle->la_flags & LLE_IFADDR) 2350 ndpc.rtm.rtm_flags |= RTF_PINNED; 2351 if (lle->ln_router != 0) 2352 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2353 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2354 /* Store state in rmx_weight value */ 2355 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2356 ndpc.rtm.rtm_index = ifp->if_index; 2357 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2358 2359 return (error); 2360} 2361 2362static struct lltable * 2363in6_lltattach(struct ifnet *ifp) 2364{ 2365 struct lltable *llt; 2366 2367 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2368 llt->llt_af = AF_INET6; 2369 llt->llt_ifp = ifp; 2370 2371 llt->llt_lookup = in6_lltable_lookup; 2372 llt->llt_alloc_entry = in6_lltable_alloc; 2373 llt->llt_delete_entry = in6_lltable_delete_entry; 2374 llt->llt_dump_entry = in6_lltable_dump_entry; 2375 llt->llt_hash = in6_lltable_hash; 2376 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2377 llt->llt_free_entry = in6_lltable_free_entry; 2378 llt->llt_match_prefix = in6_lltable_match_prefix; 2379 lltable_link(llt); 2380 2381 return (llt); 2382} 2383 2384void * 2385in6_domifattach(struct ifnet *ifp) 2386{ 2387 struct in6_ifextra *ext; 2388 2389 /* There are not IPv6-capable interfaces. */ 2390 switch (ifp->if_type) { 2391 case IFT_PFLOG: 2392 case IFT_PFSYNC: 2393 case IFT_USB: 2394 return (NULL); 2395 } 2396 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2397 bzero(ext, sizeof(*ext)); 2398 2399 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2400 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2401 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2402 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2403 2404 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2405 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2406 M_WAITOK); 2407 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2408 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2409 2410 ext->nd_ifinfo = nd6_ifattach(ifp); 2411 ext->scope6_id = scope6_ifattach(ifp); 2412 ext->lltable = in6_lltattach(ifp); 2413 2414 ext->mld_ifinfo = mld_domifattach(ifp); 2415 2416 return ext; 2417} 2418 2419int 2420in6_domifmtu(struct ifnet *ifp) 2421{ 2422 if (ifp->if_afdata[AF_INET6] == NULL) 2423 return ifp->if_mtu; 2424 2425 return (IN6_LINKMTU(ifp)); 2426} 2427 2428void 2429in6_domifdetach(struct ifnet *ifp, void *aux) 2430{ 2431 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2432 2433 mld_domifdetach(ifp); 2434 scope6_ifdetach(ext->scope6_id); 2435 nd6_ifdetach(ifp, ext->nd_ifinfo); 2436 lltable_free(ext->lltable); 2437 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2438 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2439 free(ext->in6_ifstat, M_IFADDR); 2440 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2441 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2442 free(ext->icmp6_ifstat, M_IFADDR); 2443 free(ext, M_IFADDR); 2444} 2445 2446/* 2447 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2448 * v4 mapped addr or v4 compat addr 2449 */ 2450void 2451in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2452{ 2453 2454 bzero(sin, sizeof(*sin)); 2455 sin->sin_len = sizeof(struct sockaddr_in); 2456 sin->sin_family = AF_INET; 2457 sin->sin_port = sin6->sin6_port; 2458 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2459} 2460 2461/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2462void 2463in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2464{ 2465 bzero(sin6, sizeof(*sin6)); 2466 sin6->sin6_len = sizeof(struct sockaddr_in6); 2467 sin6->sin6_family = AF_INET6; 2468 sin6->sin6_port = sin->sin_port; 2469 sin6->sin6_addr.s6_addr32[0] = 0; 2470 sin6->sin6_addr.s6_addr32[1] = 0; 2471 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2472 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2473} 2474 2475/* Convert sockaddr_in6 into sockaddr_in. */ 2476void 2477in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2478{ 2479 struct sockaddr_in *sin_p; 2480 struct sockaddr_in6 sin6; 2481 2482 /* 2483 * Save original sockaddr_in6 addr and convert it 2484 * to sockaddr_in. 2485 */ 2486 sin6 = *(struct sockaddr_in6 *)nam; 2487 sin_p = (struct sockaddr_in *)nam; 2488 in6_sin6_2_sin(sin_p, &sin6); 2489} 2490 2491/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2492void 2493in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2494{ 2495 struct sockaddr_in *sin_p; 2496 struct sockaddr_in6 *sin6_p; 2497 2498 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2499 sin_p = (struct sockaddr_in *)*nam; 2500 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2501 free(*nam, M_SONAME); 2502 *nam = (struct sockaddr *)sin6_p; 2503} 2504