1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 32 */ 33 34/*- 35 * Copyright (c) 1982, 1986, 1991, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)in.c 8.2 (Berkeley) 11/15/93 63 */ 64 65#include <sys/cdefs.h> 66__FBSDID("$FreeBSD$"); 67 68#include "opt_inet.h" 69#include "opt_inet6.h" 70 71#include <sys/param.h> 72#include <sys/eventhandler.h> 73#include <sys/errno.h> 74#include <sys/jail.h> 75#include <sys/malloc.h> 76#include <sys/socket.h> 77#include <sys/socketvar.h> 78#include <sys/sockio.h> 79#include <sys/systm.h> 80#include <sys/priv.h> 81#include <sys/proc.h> 82#include <sys/protosw.h> 83#include <sys/time.h> 84#include <sys/kernel.h> 85#include <sys/lock.h> 86#include <sys/rmlock.h> 87#include <sys/sysctl.h> 88#include <sys/syslog.h> 89 90#include <net/if.h> 91#include <net/if_var.h> 92#include <net/if_types.h> 93#include <net/route.h> 94#include <net/if_dl.h> 95#include <net/vnet.h> 96 97#include <netinet/in.h> 98#include <netinet/in_var.h> 99#include <net/if_llatbl.h> 100#include <netinet/if_ether.h> 101#include <netinet/in_systm.h> 102#include <netinet/ip.h> 103#include <netinet/in_pcb.h> 104#include <netinet/ip_carp.h> 105 106#include <netinet/ip6.h> 107#include <netinet6/ip6_var.h> 108#include <netinet6/nd6.h> 109#include <netinet6/mld6_var.h> 110#include <netinet6/ip6_mroute.h> 111#include <netinet6/in6_ifattach.h> 112#include <netinet6/scope6_var.h> 113#include <netinet6/in6_fib.h> 114#include <netinet6/in6_pcb.h> 115 116 117/* 118 * struct in6_ifreq and struct ifreq must be type punnable for common members 119 * of ifr_ifru to allow accessors to be shared. 120 */ 121_Static_assert(offsetof(struct in6_ifreq, ifr_ifru) == 122 offsetof(struct ifreq, ifr_ifru), 123 "struct in6_ifreq and struct ifreq are not type punnable"); 124 125VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 126#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 127 128/* 129 * Definitions of some costant IP6 addresses. 130 */ 131const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 132const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 133const struct in6_addr in6addr_nodelocal_allnodes = 134 IN6ADDR_NODELOCAL_ALLNODES_INIT; 135const struct in6_addr in6addr_linklocal_allnodes = 136 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 137const struct in6_addr in6addr_linklocal_allrouters = 138 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 139const struct in6_addr in6addr_linklocal_allv2routers = 140 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 141 142const struct in6_addr in6mask0 = IN6MASK0; 143const struct in6_addr in6mask32 = IN6MASK32; 144const struct in6_addr in6mask64 = IN6MASK64; 145const struct in6_addr in6mask96 = IN6MASK96; 146const struct in6_addr in6mask128 = IN6MASK128; 147 148const struct sockaddr_in6 sa6_any = 149 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 150 151static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 152 struct in6_aliasreq *, int); 153static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 154 155static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 156 struct in6_ifaddr *, int); 157static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 158 struct in6_aliasreq *, int flags); 159static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 160 struct in6_ifaddr *, int, int); 161static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 162 struct in6_ifaddr *, int); 163 164#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 165#define ia62ifa(ia6) (&((ia6)->ia_ifa)) 166 167 168void 169in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 170{ 171 struct sockaddr_dl gateway; 172 struct sockaddr_in6 mask, addr; 173 struct rtentry rt; 174 int fibnum; 175 176 /* 177 * initialize for rtmsg generation 178 */ 179 bzero(&gateway, sizeof(gateway)); 180 gateway.sdl_len = sizeof(gateway); 181 gateway.sdl_family = AF_LINK; 182 183 bzero(&rt, sizeof(rt)); 184 rt.rt_gateway = (struct sockaddr *)&gateway; 185 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 186 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 187 rt_mask(&rt) = (struct sockaddr *)&mask; 188 rt_key(&rt) = (struct sockaddr *)&addr; 189 rt.rt_flags = RTF_HOST | RTF_STATIC; 190 if (cmd == RTM_ADD) 191 rt.rt_flags |= RTF_UP; 192 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib; 193 /* Announce arrival of local address to this FIB. */ 194 rt_newaddrmsg_fib(cmd, &ia->ia_ifa, 0, &rt, fibnum); 195} 196 197int 198in6_mask2len(struct in6_addr *mask, u_char *lim0) 199{ 200 int x = 0, y; 201 u_char *lim = lim0, *p; 202 203 /* ignore the scope_id part */ 204 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 205 lim = (u_char *)mask + sizeof(*mask); 206 for (p = (u_char *)mask; p < lim; x++, p++) { 207 if (*p != 0xff) 208 break; 209 } 210 y = 0; 211 if (p < lim) { 212 for (y = 0; y < 8; y++) { 213 if ((*p & (0x80 >> y)) == 0) 214 break; 215 } 216 } 217 218 /* 219 * when the limit pointer is given, do a stricter check on the 220 * remaining bits. 221 */ 222 if (p < lim) { 223 if (y != 0 && (*p & (0x00ff >> y)) != 0) 224 return (-1); 225 for (p = p + 1; p < lim; p++) 226 if (*p != 0) 227 return (-1); 228 } 229 230 return x * 8 + y; 231} 232 233#ifdef COMPAT_FREEBSD32 234struct in6_ndifreq32 { 235 char ifname[IFNAMSIZ]; 236 uint32_t ifindex; 237}; 238#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 239#endif 240 241int 242in6_control(struct socket *so, u_long cmd, caddr_t data, 243 struct ifnet *ifp, struct thread *td) 244{ 245 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 246 struct in6_ifaddr *ia = NULL; 247 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 248 struct sockaddr_in6 *sa6; 249 int carp_attached = 0; 250 int error; 251 u_long ocmd = cmd; 252 253 /* 254 * Compat to make pre-10.x ifconfig(8) operable. 255 */ 256 if (cmd == OSIOCAIFADDR_IN6) 257 cmd = SIOCAIFADDR_IN6; 258 259 switch (cmd) { 260 case SIOCGETSGCNT_IN6: 261 case SIOCGETMIFCNT_IN6: 262 /* 263 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 264 * We cannot see how that would be needed, so do not adjust the 265 * KPI blindly; more likely should clean up the IPv4 variant. 266 */ 267 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 268 } 269 270 switch (cmd) { 271 case SIOCAADDRCTL_POLICY: 272 case SIOCDADDRCTL_POLICY: 273 if (td != NULL) { 274 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 275 if (error) 276 return (error); 277 } 278 return (in6_src_ioctl(cmd, data)); 279 } 280 281 if (ifp == NULL) 282 return (EOPNOTSUPP); 283 284 switch (cmd) { 285 case SIOCSNDFLUSH_IN6: 286 case SIOCSPFXFLUSH_IN6: 287 case SIOCSRTRFLUSH_IN6: 288 case SIOCSDEFIFACE_IN6: 289 case SIOCSIFINFO_FLAGS: 290 case SIOCSIFINFO_IN6: 291 if (td != NULL) { 292 error = priv_check(td, PRIV_NETINET_ND6); 293 if (error) 294 return (error); 295 } 296 /* FALLTHROUGH */ 297 case OSIOCGIFINFO_IN6: 298 case SIOCGIFINFO_IN6: 299 case SIOCGNBRINFO_IN6: 300 case SIOCGDEFIFACE_IN6: 301 return (nd6_ioctl(cmd, data, ifp)); 302 303#ifdef COMPAT_FREEBSD32 304 case SIOCGDEFIFACE32_IN6: 305 { 306 struct in6_ndifreq ndif; 307 struct in6_ndifreq32 *ndif32; 308 309 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 310 ifp); 311 if (error) 312 return (error); 313 ndif32 = (struct in6_ndifreq32 *)data; 314 ndif32->ifindex = ndif.ifindex; 315 return (0); 316 } 317#endif 318 } 319 320 switch (cmd) { 321 case SIOCSIFPREFIX_IN6: 322 case SIOCDIFPREFIX_IN6: 323 case SIOCAIFPREFIX_IN6: 324 case SIOCCIFPREFIX_IN6: 325 case SIOCSGIFPREFIX_IN6: 326 case SIOCGIFPREFIX_IN6: 327 log(LOG_NOTICE, 328 "prefix ioctls are now invalidated. " 329 "please use ifconfig.\n"); 330 return (EOPNOTSUPP); 331 } 332 333 switch (cmd) { 334 case SIOCSSCOPE6: 335 if (td != NULL) { 336 error = priv_check(td, PRIV_NETINET_SCOPE6); 337 if (error) 338 return (error); 339 } 340 /* FALLTHROUGH */ 341 case SIOCGSCOPE6: 342 case SIOCGSCOPE6DEF: 343 return (scope6_ioctl(cmd, data, ifp)); 344 } 345 346 /* 347 * Find address for this interface, if it exists. 348 * 349 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 350 * only, and used the first interface address as the target of other 351 * operations (without checking ifra_addr). This was because netinet 352 * code/API assumed at most 1 interface address per interface. 353 * Since IPv6 allows a node to assign multiple addresses 354 * on a single interface, we almost always look and check the 355 * presence of ifra_addr, and reject invalid ones here. 356 * It also decreases duplicated code among SIOC*_IN6 operations. 357 */ 358 switch (cmd) { 359 case SIOCAIFADDR_IN6: 360 case SIOCSIFPHYADDR_IN6: 361 sa6 = &ifra->ifra_addr; 362 break; 363 case SIOCSIFADDR_IN6: 364 case SIOCGIFADDR_IN6: 365 case SIOCSIFDSTADDR_IN6: 366 case SIOCSIFNETMASK_IN6: 367 case SIOCGIFDSTADDR_IN6: 368 case SIOCGIFNETMASK_IN6: 369 case SIOCDIFADDR_IN6: 370 case SIOCGIFPSRCADDR_IN6: 371 case SIOCGIFPDSTADDR_IN6: 372 case SIOCGIFAFLAG_IN6: 373 case SIOCSNDFLUSH_IN6: 374 case SIOCSPFXFLUSH_IN6: 375 case SIOCSRTRFLUSH_IN6: 376 case SIOCGIFALIFETIME_IN6: 377 case SIOCGIFSTAT_IN6: 378 case SIOCGIFSTAT_ICMP6: 379 sa6 = &ifr->ifr_addr; 380 break; 381 case SIOCSIFADDR: 382 case SIOCSIFBRDADDR: 383 case SIOCSIFDSTADDR: 384 case SIOCSIFNETMASK: 385 /* 386 * Although we should pass any non-INET6 ioctl requests 387 * down to driver, we filter some legacy INET requests. 388 * Drivers trust SIOCSIFADDR et al to come from an already 389 * privileged layer, and do not perform any credentials 390 * checks or input validation. 391 */ 392 return (EINVAL); 393 default: 394 sa6 = NULL; 395 break; 396 } 397 if (sa6 && sa6->sin6_family == AF_INET6) { 398 if (sa6->sin6_scope_id != 0) 399 error = sa6_embedscope(sa6, 0); 400 else 401 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 402 if (error != 0) 403 return (error); 404 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 405 &sa6->sin6_addr)) != 0) 406 return (error); 407 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 408 } else 409 ia = NULL; 410 411 switch (cmd) { 412 case SIOCSIFADDR_IN6: 413 case SIOCSIFDSTADDR_IN6: 414 case SIOCSIFNETMASK_IN6: 415 /* 416 * Since IPv6 allows a node to assign multiple addresses 417 * on a single interface, SIOCSIFxxx ioctls are deprecated. 418 */ 419 /* we decided to obsolete this command (20000704) */ 420 error = EINVAL; 421 goto out; 422 423 case SIOCDIFADDR_IN6: 424 /* 425 * for IPv4, we look for existing in_ifaddr here to allow 426 * "ifconfig if0 delete" to remove the first IPv4 address on 427 * the interface. For IPv6, as the spec allows multiple 428 * interface address from the day one, we consider "remove the 429 * first one" semantics to be not preferable. 430 */ 431 if (ia == NULL) { 432 error = EADDRNOTAVAIL; 433 goto out; 434 } 435 /* FALLTHROUGH */ 436 case SIOCAIFADDR_IN6: 437 /* 438 * We always require users to specify a valid IPv6 address for 439 * the corresponding operation. 440 */ 441 if (ifra->ifra_addr.sin6_family != AF_INET6 || 442 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 443 error = EAFNOSUPPORT; 444 goto out; 445 } 446 447 if (td != NULL) { 448 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 449 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 450 if (error) 451 goto out; 452 } 453 /* FALLTHROUGH */ 454 case SIOCGIFSTAT_IN6: 455 case SIOCGIFSTAT_ICMP6: 456 if (ifp->if_afdata[AF_INET6] == NULL) { 457 error = EPFNOSUPPORT; 458 goto out; 459 } 460 break; 461 462 case SIOCGIFADDR_IN6: 463 /* This interface is basically deprecated. use SIOCGIFCONF. */ 464 /* FALLTHROUGH */ 465 case SIOCGIFAFLAG_IN6: 466 case SIOCGIFNETMASK_IN6: 467 case SIOCGIFDSTADDR_IN6: 468 case SIOCGIFALIFETIME_IN6: 469 /* must think again about its semantics */ 470 if (ia == NULL) { 471 error = EADDRNOTAVAIL; 472 goto out; 473 } 474 break; 475 } 476 477 switch (cmd) { 478 case SIOCGIFADDR_IN6: 479 ifr->ifr_addr = ia->ia_addr; 480 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 481 goto out; 482 break; 483 484 case SIOCGIFDSTADDR_IN6: 485 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 486 error = EINVAL; 487 goto out; 488 } 489 ifr->ifr_dstaddr = ia->ia_dstaddr; 490 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 491 goto out; 492 break; 493 494 case SIOCGIFNETMASK_IN6: 495 ifr->ifr_addr = ia->ia_prefixmask; 496 break; 497 498 case SIOCGIFAFLAG_IN6: 499 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 500 break; 501 502 case SIOCGIFSTAT_IN6: 503 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 504 ifp->if_afdata[AF_INET6])->in6_ifstat, 505 &ifr->ifr_ifru.ifru_stat, 506 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 507 break; 508 509 case SIOCGIFSTAT_ICMP6: 510 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 511 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 512 &ifr->ifr_ifru.ifru_icmp6stat, 513 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 514 break; 515 516 case SIOCGIFALIFETIME_IN6: 517 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 518 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 519 time_t maxexpire; 520 struct in6_addrlifetime *retlt = 521 &ifr->ifr_ifru.ifru_lifetime; 522 523 /* 524 * XXX: adjust expiration time assuming time_t is 525 * signed. 526 */ 527 maxexpire = (-1) & 528 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 529 if (ia->ia6_lifetime.ia6t_vltime < 530 maxexpire - ia->ia6_updatetime) { 531 retlt->ia6t_expire = ia->ia6_updatetime + 532 ia->ia6_lifetime.ia6t_vltime; 533 } else 534 retlt->ia6t_expire = maxexpire; 535 } 536 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 537 time_t maxexpire; 538 struct in6_addrlifetime *retlt = 539 &ifr->ifr_ifru.ifru_lifetime; 540 541 /* 542 * XXX: adjust expiration time assuming time_t is 543 * signed. 544 */ 545 maxexpire = (-1) & 546 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 547 if (ia->ia6_lifetime.ia6t_pltime < 548 maxexpire - ia->ia6_updatetime) { 549 retlt->ia6t_preferred = ia->ia6_updatetime + 550 ia->ia6_lifetime.ia6t_pltime; 551 } else 552 retlt->ia6t_preferred = maxexpire; 553 } 554 break; 555 556 case SIOCAIFADDR_IN6: 557 { 558 struct nd_prefixctl pr0; 559 struct nd_prefix *pr; 560 561 /* 562 * first, make or update the interface address structure, 563 * and link it to the list. 564 */ 565 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 566 goto out; 567 if (ia != NULL) { 568 if (ia->ia_ifa.ifa_carp) 569 (*carp_detach_p)(&ia->ia_ifa, true); 570 ifa_free(&ia->ia_ifa); 571 } 572 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 573 == NULL) { 574 /* 575 * this can happen when the user specify the 0 valid 576 * lifetime. 577 */ 578 break; 579 } 580 581 if (cmd == ocmd && ifra->ifra_vhid > 0) { 582 if (carp_attach_p != NULL) 583 error = (*carp_attach_p)(&ia->ia_ifa, 584 ifra->ifra_vhid); 585 else 586 error = EPROTONOSUPPORT; 587 if (error) 588 goto out; 589 else 590 carp_attached = 1; 591 } 592 593 /* 594 * then, make the prefix on-link on the interface. 595 * XXX: we'd rather create the prefix before the address, but 596 * we need at least one address to install the corresponding 597 * interface route, so we configure the address first. 598 */ 599 600 /* 601 * convert mask to prefix length (prefixmask has already 602 * been validated in in6_update_ifa(). 603 */ 604 bzero(&pr0, sizeof(pr0)); 605 pr0.ndpr_ifp = ifp; 606 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 607 NULL); 608 if (pr0.ndpr_plen == 128) { 609 /* we don't need to install a host route. */ 610 goto aifaddr_out; 611 } 612 pr0.ndpr_prefix = ifra->ifra_addr; 613 /* apply the mask for safety. */ 614 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 615 &ifra->ifra_prefixmask.sin6_addr); 616 617 /* 618 * XXX: since we don't have an API to set prefix (not address) 619 * lifetimes, we just use the same lifetimes as addresses. 620 * The (temporarily) installed lifetimes can be overridden by 621 * later advertised RAs (when accept_rtadv is non 0), which is 622 * an intended behavior. 623 */ 624 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 625 pr0.ndpr_raf_auto = 626 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 627 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 628 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 629 630 /* add the prefix if not yet. */ 631 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 632 /* 633 * nd6_prelist_add will install the corresponding 634 * interface route. 635 */ 636 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 637 if (carp_attached) 638 (*carp_detach_p)(&ia->ia_ifa, false); 639 goto out; 640 } 641 } 642 643 /* relate the address to the prefix */ 644 if (ia->ia6_ndpr == NULL) { 645 ia->ia6_ndpr = pr; 646 pr->ndpr_addrcnt++; 647 648 /* 649 * If this is the first autoconf address from the 650 * prefix, create a temporary address as well 651 * (when required). 652 */ 653 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 654 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 655 int e; 656 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 657 log(LOG_NOTICE, "in6_control: failed " 658 "to create a temporary address, " 659 "errno=%d\n", e); 660 } 661 } 662 } 663 nd6_prefix_rele(pr); 664 665 /* 666 * this might affect the status of autoconfigured addresses, 667 * that is, this address might make other addresses detached. 668 */ 669 pfxlist_onlink_check(); 670 671aifaddr_out: 672 /* 673 * Try to clear the flag when a new IPv6 address is added 674 * onto an IFDISABLED interface and it succeeds. 675 */ 676 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 677 struct in6_ndireq nd; 678 679 memset(&nd, 0, sizeof(nd)); 680 nd.ndi.flags = ND_IFINFO(ifp)->flags; 681 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 682 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 683 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 684 "SIOCSIFINFO_FLAGS for -ifdisabled " 685 "failed."); 686 /* 687 * Ignore failure of clearing the flag intentionally. 688 * The failure means address duplication was detected. 689 */ 690 } 691 break; 692 } 693 694 case SIOCDIFADDR_IN6: 695 { 696 struct nd_prefix *pr; 697 698 /* 699 * If the address being deleted is the only one that owns 700 * the corresponding prefix, expire the prefix as well. 701 * XXX: theoretically, we don't have to worry about such 702 * relationship, since we separate the address management 703 * and the prefix management. We do this, however, to provide 704 * as much backward compatibility as possible in terms of 705 * the ioctl operation. 706 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 707 */ 708 pr = ia->ia6_ndpr; 709 in6_purgeaddr(&ia->ia_ifa); 710 if (pr != NULL && pr->ndpr_addrcnt == 0) { 711 ND6_WLOCK(); 712 nd6_prefix_unlink(pr, NULL); 713 ND6_WUNLOCK(); 714 nd6_prefix_del(pr); 715 } 716 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 717 IFADDR_EVENT_DEL); 718 break; 719 } 720 721 default: 722 if (ifp->if_ioctl == NULL) { 723 error = EOPNOTSUPP; 724 goto out; 725 } 726 error = (*ifp->if_ioctl)(ifp, cmd, data); 727 goto out; 728 } 729 730 error = 0; 731out: 732 if (ia != NULL) 733 ifa_free(&ia->ia_ifa); 734 return (error); 735} 736 737 738static struct in6_multi_mship * 739in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr, 740 int *errorp, int delay) 741{ 742 struct in6_multi_mship *imm; 743 int error; 744 745 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT); 746 if (imm == NULL) { 747 *errorp = ENOBUFS; 748 return (NULL); 749 } 750 751 delay = (delay * PR_FASTHZ) / hz; 752 753 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay); 754 if (error) { 755 *errorp = error; 756 free(imm, M_IP6MADDR); 757 return (NULL); 758 } 759 760 return (imm); 761} 762/* 763 * Join necessary multicast groups. Factored out from in6_update_ifa(). 764 * This entire work should only be done once, for the default FIB. 765 */ 766static int 767in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 768 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 769{ 770 char ip6buf[INET6_ADDRSTRLEN]; 771 struct in6_addr mltaddr; 772 struct in6_multi_mship *imm; 773 int delay, error; 774 775 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 776 777 /* Join solicited multicast addr for new host id. */ 778 bzero(&mltaddr, sizeof(struct in6_addr)); 779 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 780 mltaddr.s6_addr32[2] = htonl(1); 781 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 782 mltaddr.s6_addr8[12] = 0xff; 783 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 784 /* XXX: should not happen */ 785 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 786 goto cleanup; 787 } 788 delay = error = 0; 789 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 790 /* 791 * We need a random delay for DAD on the address being 792 * configured. It also means delaying transmission of the 793 * corresponding MLD report to avoid report collision. 794 * [RFC 4861, Section 6.3.7] 795 */ 796 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 797 } 798 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 799 if (imm == NULL) { 800 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 801 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 802 if_name(ifp), error)); 803 goto cleanup; 804 } 805 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 806 *in6m_sol = imm->i6mm_maddr; 807 808 /* 809 * Join link-local all-nodes address. 810 */ 811 mltaddr = in6addr_linklocal_allnodes; 812 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 813 goto cleanup; /* XXX: should not fail */ 814 815 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 816 if (imm == NULL) { 817 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 818 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 819 if_name(ifp), error)); 820 goto cleanup; 821 } 822 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 823 824 /* 825 * Join node information group address. 826 */ 827 delay = 0; 828 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 829 /* 830 * The spec does not say anything about delay for this group, 831 * but the same logic should apply. 832 */ 833 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 834 } 835 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 836 /* XXX jinmei */ 837 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 838 if (imm == NULL) 839 nd6log((LOG_WARNING, 840 "%s: in6_joingroup failed for %s on %s " 841 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 842 &mltaddr), if_name(ifp), error)); 843 /* XXX not very fatal, go on... */ 844 else 845 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 846 } 847 if (V_icmp6_nodeinfo_oldmcprefix && 848 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 849 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 850 if (imm == NULL) 851 nd6log((LOG_WARNING, 852 "%s: in6_joingroup failed for %s on %s " 853 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 854 &mltaddr), if_name(ifp), error)); 855 /* XXX not very fatal, go on... */ 856 else 857 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 858 } 859 860 /* 861 * Join interface-local all-nodes address. 862 * (ff01::1%ifN, and ff01::%ifN/32) 863 */ 864 mltaddr = in6addr_nodelocal_allnodes; 865 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 866 goto cleanup; /* XXX: should not fail */ 867 868 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 869 if (imm == NULL) { 870 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 871 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 872 &mltaddr), if_name(ifp), error)); 873 goto cleanup; 874 } 875 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 876 877cleanup: 878 return (error); 879} 880 881/* 882 * Update parameters of an IPv6 interface address. 883 * If necessary, a new entry is created and linked into address chains. 884 * This function is separated from in6_control(). 885 */ 886int 887in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 888 struct in6_ifaddr *ia, int flags) 889{ 890 int error, hostIsNew = 0; 891 892 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 893 return (error); 894 895 if (ia == NULL) { 896 hostIsNew = 1; 897 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 898 return (ENOBUFS); 899 } 900 901 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 902 if (error != 0) { 903 if (hostIsNew != 0) { 904 in6_unlink_ifa(ia, ifp); 905 ifa_free(&ia->ia_ifa); 906 } 907 return (error); 908 } 909 910 if (hostIsNew) 911 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 912 913 return (error); 914} 915 916/* 917 * Fill in basic IPv6 address request info. 918 */ 919void 920in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 921 const struct in6_addr *mask) 922{ 923 924 memset(ifra, 0, sizeof(struct in6_aliasreq)); 925 926 ifra->ifra_addr.sin6_family = AF_INET6; 927 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 928 if (addr != NULL) 929 ifra->ifra_addr.sin6_addr = *addr; 930 931 ifra->ifra_prefixmask.sin6_family = AF_INET6; 932 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 933 if (mask != NULL) 934 ifra->ifra_prefixmask.sin6_addr = *mask; 935} 936 937static int 938in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 939 struct in6_ifaddr *ia, int flags) 940{ 941 int plen = -1; 942 struct sockaddr_in6 dst6; 943 struct in6_addrlifetime *lt; 944 char ip6buf[INET6_ADDRSTRLEN]; 945 946 /* Validate parameters */ 947 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 948 return (EINVAL); 949 950 /* 951 * The destination address for a p2p link must have a family 952 * of AF_UNSPEC or AF_INET6. 953 */ 954 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 955 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 956 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 957 return (EAFNOSUPPORT); 958 959 /* 960 * Validate address 961 */ 962 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 963 ifra->ifra_addr.sin6_family != AF_INET6) 964 return (EINVAL); 965 966 /* 967 * validate ifra_prefixmask. don't check sin6_family, netmask 968 * does not carry fields other than sin6_len. 969 */ 970 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 971 return (EINVAL); 972 /* 973 * Because the IPv6 address architecture is classless, we require 974 * users to specify a (non 0) prefix length (mask) for a new address. 975 * We also require the prefix (when specified) mask is valid, and thus 976 * reject a non-consecutive mask. 977 */ 978 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 979 return (EINVAL); 980 if (ifra->ifra_prefixmask.sin6_len != 0) { 981 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 982 (u_char *)&ifra->ifra_prefixmask + 983 ifra->ifra_prefixmask.sin6_len); 984 if (plen <= 0) 985 return (EINVAL); 986 } else { 987 /* 988 * In this case, ia must not be NULL. We just use its prefix 989 * length. 990 */ 991 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 992 } 993 /* 994 * If the destination address on a p2p interface is specified, 995 * and the address is a scoped one, validate/set the scope 996 * zone identifier. 997 */ 998 dst6 = ifra->ifra_dstaddr; 999 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1000 (dst6.sin6_family == AF_INET6)) { 1001 struct in6_addr in6_tmp; 1002 u_int32_t zoneid; 1003 1004 in6_tmp = dst6.sin6_addr; 1005 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1006 return (EINVAL); /* XXX: should be impossible */ 1007 1008 if (dst6.sin6_scope_id != 0) { 1009 if (dst6.sin6_scope_id != zoneid) 1010 return (EINVAL); 1011 } else /* user omit to specify the ID. */ 1012 dst6.sin6_scope_id = zoneid; 1013 1014 /* convert into the internal form */ 1015 if (sa6_embedscope(&dst6, 0)) 1016 return (EINVAL); /* XXX: should be impossible */ 1017 } 1018 /* Modify original ifra_dstaddr to reflect changes */ 1019 ifra->ifra_dstaddr = dst6; 1020 1021 /* 1022 * The destination address can be specified only for a p2p or a 1023 * loopback interface. If specified, the corresponding prefix length 1024 * must be 128. 1025 */ 1026 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1027 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1028 /* XXX: noisy message */ 1029 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1030 "be specified for a p2p or a loopback IF only\n")); 1031 return (EINVAL); 1032 } 1033 if (plen != 128) { 1034 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1035 "be 128 when dstaddr is specified\n")); 1036 return (EINVAL); 1037 } 1038 } 1039 /* lifetime consistency check */ 1040 lt = &ifra->ifra_lifetime; 1041 if (lt->ia6t_pltime > lt->ia6t_vltime) 1042 return (EINVAL); 1043 if (lt->ia6t_vltime == 0) { 1044 /* 1045 * the following log might be noisy, but this is a typical 1046 * configuration mistake or a tool's bug. 1047 */ 1048 nd6log((LOG_INFO, 1049 "in6_update_ifa: valid lifetime is 0 for %s\n", 1050 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1051 1052 if (ia == NULL) 1053 return (0); /* there's nothing to do */ 1054 } 1055 1056 /* Check prefix mask */ 1057 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1058 /* 1059 * We prohibit changing the prefix length of an existing 1060 * address, because 1061 * + such an operation should be rare in IPv6, and 1062 * + the operation would confuse prefix management. 1063 */ 1064 if (ia->ia_prefixmask.sin6_len != 0 && 1065 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1066 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1067 "of an existing %s address should not be changed\n", 1068 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1069 1070 return (EINVAL); 1071 } 1072 } 1073 1074 return (0); 1075} 1076 1077 1078/* 1079 * Allocate a new ifaddr and link it into chains. 1080 */ 1081static struct in6_ifaddr * 1082in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1083{ 1084 struct in6_ifaddr *ia; 1085 1086 /* 1087 * When in6_alloc_ifa() is called in a process of a received 1088 * RA, it is called under an interrupt context. So, we should 1089 * call malloc with M_NOWAIT. 1090 */ 1091 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1092 if (ia == NULL) 1093 return (NULL); 1094 LIST_INIT(&ia->ia6_memberships); 1095 /* Initialize the address and masks, and put time stamp */ 1096 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1097 ia->ia_addr.sin6_family = AF_INET6; 1098 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1099 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1100 ia->ia_addr = ifra->ifra_addr; 1101 ia->ia6_createtime = time_uptime; 1102 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1103 /* 1104 * Some functions expect that ifa_dstaddr is not 1105 * NULL for p2p interfaces. 1106 */ 1107 ia->ia_ifa.ifa_dstaddr = 1108 (struct sockaddr *)&ia->ia_dstaddr; 1109 } else { 1110 ia->ia_ifa.ifa_dstaddr = NULL; 1111 } 1112 1113 /* set prefix mask if any */ 1114 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1115 if (ifra->ifra_prefixmask.sin6_len != 0) { 1116 ia->ia_prefixmask.sin6_family = AF_INET6; 1117 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1118 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1119 } 1120 1121 ia->ia_ifp = ifp; 1122 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1123 IF_ADDR_WLOCK(ifp); 1124 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1125 IF_ADDR_WUNLOCK(ifp); 1126 1127 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1128 IN6_IFADDR_WLOCK(); 1129 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1130 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1131 IN6_IFADDR_WUNLOCK(); 1132 1133 return (ia); 1134} 1135 1136/* 1137 * Update/configure interface address parameters: 1138 * 1139 * 1) Update lifetime 1140 * 2) Update interface metric ad flags 1141 * 3) Notify other subsystems 1142 */ 1143static int 1144in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1145 struct in6_ifaddr *ia, int hostIsNew, int flags) 1146{ 1147 int error; 1148 1149 /* update timestamp */ 1150 ia->ia6_updatetime = time_uptime; 1151 1152 /* 1153 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1154 * to see if the address is deprecated or invalidated, but initialize 1155 * these members for applications. 1156 */ 1157 ia->ia6_lifetime = ifra->ifra_lifetime; 1158 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1159 ia->ia6_lifetime.ia6t_expire = 1160 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1161 } else 1162 ia->ia6_lifetime.ia6t_expire = 0; 1163 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1164 ia->ia6_lifetime.ia6t_preferred = 1165 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1166 } else 1167 ia->ia6_lifetime.ia6t_preferred = 0; 1168 1169 /* 1170 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1171 * userland, make it deprecated. 1172 */ 1173 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1174 ia->ia6_lifetime.ia6t_pltime = 0; 1175 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1176 } 1177 1178 /* 1179 * configure address flags. 1180 */ 1181 ia->ia6_flags = ifra->ifra_flags; 1182 1183 /* 1184 * Make the address tentative before joining multicast addresses, 1185 * so that corresponding MLD responses would not have a tentative 1186 * source address. 1187 */ 1188 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1189 1190 /* 1191 * DAD should be performed for an new address or addresses on 1192 * an interface with ND6_IFF_IFDISABLED. 1193 */ 1194 if (in6if_do_dad(ifp) && 1195 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1196 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1197 1198 /* notify other subsystems */ 1199 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1200 1201 return (error); 1202} 1203 1204/* 1205 * Do link-level ifa job: 1206 * 1) Add lle entry for added address 1207 * 2) Notifies routing socket users about new address 1208 * 3) join appropriate multicast group 1209 * 4) start DAD if enabled 1210 */ 1211static int 1212in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1213 struct in6_ifaddr *ia, int flags) 1214{ 1215 struct in6_multi *in6m_sol; 1216 int error = 0; 1217 1218 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1219 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1220 in6_purgeaddr(&ia->ia_ifa); 1221 ifa_free(&ia->ia_ifa); 1222 return (error); 1223 } 1224 1225 /* Join necessary multicast groups. */ 1226 in6m_sol = NULL; 1227 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1228 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1229 if (error != 0) { 1230 in6_purgeaddr(&ia->ia_ifa); 1231 ifa_free(&ia->ia_ifa); 1232 return (error); 1233 } 1234 } 1235 1236 /* Perform DAD, if the address is TENTATIVE. */ 1237 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1238 int delay, mindelay, maxdelay; 1239 1240 delay = 0; 1241 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1242 /* 1243 * We need to impose a delay before sending an NS 1244 * for DAD. Check if we also needed a delay for the 1245 * corresponding MLD message. If we did, the delay 1246 * should be larger than the MLD delay (this could be 1247 * relaxed a bit, but this simple logic is at least 1248 * safe). 1249 * XXX: Break data hiding guidelines and look at 1250 * state for the solicited multicast group. 1251 */ 1252 mindelay = 0; 1253 if (in6m_sol != NULL && 1254 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1255 mindelay = in6m_sol->in6m_timer; 1256 } 1257 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1258 if (maxdelay - mindelay == 0) 1259 delay = 0; 1260 else { 1261 delay = 1262 (arc4random() % (maxdelay - mindelay)) + 1263 mindelay; 1264 } 1265 } 1266 nd6_dad_start((struct ifaddr *)ia, delay); 1267 } 1268 1269 in6_newaddrmsg(ia, RTM_ADD); 1270 ifa_free(&ia->ia_ifa); 1271 return (error); 1272} 1273 1274void 1275in6_purgeaddr(struct ifaddr *ifa) 1276{ 1277 struct ifnet *ifp = ifa->ifa_ifp; 1278 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1279 struct in6_multi_mship *imm; 1280 int plen, error; 1281 1282 if (ifa->ifa_carp) 1283 (*carp_detach_p)(ifa, false); 1284 1285 /* 1286 * Remove the loopback route to the interface address. 1287 * The check for the current setting of "nd6_useloopback" 1288 * is not needed. 1289 */ 1290 if (ia->ia_flags & IFA_RTSELF) { 1291 error = ifa_del_loopback_route((struct ifaddr *)ia, 1292 (struct sockaddr *)&ia->ia_addr); 1293 if (error == 0) 1294 ia->ia_flags &= ~IFA_RTSELF; 1295 } 1296 1297 /* stop DAD processing */ 1298 nd6_dad_stop(ifa); 1299 1300 /* Leave multicast groups. */ 1301 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1302 LIST_REMOVE(imm, i6mm_chain); 1303 if (imm->i6mm_maddr != NULL) 1304 in6_leavegroup(imm->i6mm_maddr, NULL); 1305 free(imm, M_IP6MADDR); 1306 } 1307 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1308 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1309 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1310 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1311 if (error != 0) 1312 log(LOG_INFO, "%s: err=%d, destination address delete " 1313 "failed\n", __func__, error); 1314 ia->ia_flags &= ~IFA_ROUTE; 1315 } 1316 1317 in6_newaddrmsg(ia, RTM_DELETE); 1318 in6_unlink_ifa(ia, ifp); 1319} 1320 1321static void 1322in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1323{ 1324 char ip6buf[INET6_ADDRSTRLEN]; 1325 int remove_lle; 1326 1327 IF_ADDR_WLOCK(ifp); 1328 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 1329 IF_ADDR_WUNLOCK(ifp); 1330 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1331 1332 /* 1333 * Defer the release of what might be the last reference to the 1334 * in6_ifaddr so that it can't be freed before the remainder of the 1335 * cleanup. 1336 */ 1337 IN6_IFADDR_WLOCK(); 1338 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link); 1339 CK_LIST_REMOVE(ia, ia6_hash); 1340 IN6_IFADDR_WUNLOCK(); 1341 1342 /* 1343 * Release the reference to the base prefix. There should be a 1344 * positive reference. 1345 */ 1346 remove_lle = 0; 1347 if (ia->ia6_ndpr == NULL) { 1348 nd6log((LOG_NOTICE, 1349 "in6_unlink_ifa: autoconf'ed address " 1350 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1351 } else { 1352 ia->ia6_ndpr->ndpr_addrcnt--; 1353 /* Do not delete lles within prefix if refcont != 0 */ 1354 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1355 remove_lle = 1; 1356 ia->ia6_ndpr = NULL; 1357 } 1358 1359 nd6_rem_ifa_lle(ia, remove_lle); 1360 1361 /* 1362 * Also, if the address being removed is autoconf'ed, call 1363 * pfxlist_onlink_check() since the release might affect the status of 1364 * other (detached) addresses. 1365 */ 1366 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1367 pfxlist_onlink_check(); 1368 } 1369 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1370} 1371 1372/* 1373 * Notifies other subsystems about address change/arrival: 1374 * 1) Notifies device handler on the first IPv6 address assignment 1375 * 2) Handle routing table changes for P2P links and route 1376 * 3) Handle routing table changes for address host route 1377 */ 1378static int 1379in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1380 struct in6_aliasreq *ifra, int hostIsNew) 1381{ 1382 int error = 0, plen, ifacount = 0; 1383 struct ifaddr *ifa; 1384 struct sockaddr_in6 *pdst; 1385 char ip6buf[INET6_ADDRSTRLEN]; 1386 1387 /* 1388 * Give the interface a chance to initialize 1389 * if this is its first address, 1390 */ 1391 if (hostIsNew != 0) { 1392 IF_ADDR_RLOCK(ifp); 1393 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1394 if (ifa->ifa_addr->sa_family != AF_INET6) 1395 continue; 1396 ifacount++; 1397 } 1398 IF_ADDR_RUNLOCK(ifp); 1399 } 1400 1401 if (ifacount <= 1 && ifp->if_ioctl) { 1402 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1403 if (error) 1404 goto done; 1405 } 1406 1407 /* 1408 * If a new destination address is specified, scrub the old one and 1409 * install the new destination. Note that the interface must be 1410 * p2p or loopback. 1411 */ 1412 pdst = &ifra->ifra_dstaddr; 1413 if (pdst->sin6_family == AF_INET6 && 1414 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1415 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1416 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1417 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1418 "remove a route to the old destination: %s\n", 1419 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1420 /* proceed anyway... */ 1421 } else 1422 ia->ia_flags &= ~IFA_ROUTE; 1423 ia->ia_dstaddr = *pdst; 1424 } 1425 1426 /* 1427 * If a new destination address is specified for a point-to-point 1428 * interface, install a route to the destination as an interface 1429 * direct route. 1430 * XXX: the logic below rejects assigning multiple addresses on a p2p 1431 * interface that share the same destination. 1432 */ 1433 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1434 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1435 ia->ia_dstaddr.sin6_family == AF_INET6) { 1436 int rtflags = RTF_UP | RTF_HOST; 1437 /* 1438 * Handle the case for ::1 . 1439 */ 1440 if (ifp->if_flags & IFF_LOOPBACK) 1441 ia->ia_flags |= IFA_RTSELF; 1442 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1443 if (error) 1444 goto done; 1445 ia->ia_flags |= IFA_ROUTE; 1446 } 1447 1448 /* 1449 * add a loopback route to self if not exists 1450 */ 1451 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1452 error = ifa_add_loopback_route((struct ifaddr *)ia, 1453 (struct sockaddr *)&ia->ia_addr); 1454 if (error == 0) 1455 ia->ia_flags |= IFA_RTSELF; 1456 } 1457done: 1458 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1459 "Invoking IPv6 network device address event may sleep"); 1460 1461 ifa_ref(&ia->ia_ifa); 1462 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 1463 IFADDR_EVENT_ADD); 1464 ifa_free(&ia->ia_ifa); 1465 1466 return (error); 1467} 1468 1469/* 1470 * Find an IPv6 interface link-local address specific to an interface. 1471 * ifaddr is returned referenced. 1472 */ 1473struct in6_ifaddr * 1474in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1475{ 1476 struct ifaddr *ifa; 1477 1478 IF_ADDR_RLOCK(ifp); 1479 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1480 if (ifa->ifa_addr->sa_family != AF_INET6) 1481 continue; 1482 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1483 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1484 ignoreflags) != 0) 1485 continue; 1486 ifa_ref(ifa); 1487 break; 1488 } 1489 } 1490 IF_ADDR_RUNLOCK(ifp); 1491 1492 return ((struct in6_ifaddr *)ifa); 1493} 1494 1495 1496/* 1497 * find the interface address corresponding to a given IPv6 address. 1498 * ifaddr is returned referenced. 1499 */ 1500struct in6_ifaddr * 1501in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1502{ 1503 struct rm_priotracker in6_ifa_tracker; 1504 struct in6_ifaddr *ia; 1505 1506 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1507 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1508 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1509 if (zoneid != 0 && 1510 zoneid != ia->ia_addr.sin6_scope_id) 1511 continue; 1512 ifa_ref(&ia->ia_ifa); 1513 break; 1514 } 1515 } 1516 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1517 return (ia); 1518} 1519 1520/* 1521 * find the internet address corresponding to a given interface and address. 1522 * ifaddr is returned referenced. 1523 */ 1524struct in6_ifaddr * 1525in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1526{ 1527 struct ifaddr *ifa; 1528 1529 IF_ADDR_RLOCK(ifp); 1530 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1531 if (ifa->ifa_addr->sa_family != AF_INET6) 1532 continue; 1533 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1534 ifa_ref(ifa); 1535 break; 1536 } 1537 } 1538 IF_ADDR_RUNLOCK(ifp); 1539 1540 return ((struct in6_ifaddr *)ifa); 1541} 1542 1543/* 1544 * Find a link-local scoped address on ifp and return it if any. 1545 */ 1546struct in6_ifaddr * 1547in6ifa_llaonifp(struct ifnet *ifp) 1548{ 1549 struct sockaddr_in6 *sin6; 1550 struct ifaddr *ifa; 1551 1552 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1553 return (NULL); 1554 IF_ADDR_RLOCK(ifp); 1555 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1556 if (ifa->ifa_addr->sa_family != AF_INET6) 1557 continue; 1558 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1559 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1560 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1561 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1562 break; 1563 } 1564 IF_ADDR_RUNLOCK(ifp); 1565 1566 return ((struct in6_ifaddr *)ifa); 1567} 1568 1569/* 1570 * Convert IP6 address to printable (loggable) representation. Caller 1571 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1572 */ 1573static char digits[] = "0123456789abcdef"; 1574char * 1575ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1576{ 1577 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1578 char *cp; 1579 const u_int16_t *a = (const u_int16_t *)addr; 1580 const u_int8_t *d; 1581 int dcolon = 0, zero = 0; 1582 1583 cp = ip6buf; 1584 1585 for (i = 0; i < 8; i++) { 1586 if (*(a + i) == 0) { 1587 cnt++; 1588 if (cnt == 1) 1589 idx = i; 1590 } 1591 else if (maxcnt < cnt) { 1592 maxcnt = cnt; 1593 index = idx; 1594 cnt = 0; 1595 } 1596 } 1597 if (maxcnt < cnt) { 1598 maxcnt = cnt; 1599 index = idx; 1600 } 1601 1602 for (i = 0; i < 8; i++) { 1603 if (dcolon == 1) { 1604 if (*a == 0) { 1605 if (i == 7) 1606 *cp++ = ':'; 1607 a++; 1608 continue; 1609 } else 1610 dcolon = 2; 1611 } 1612 if (*a == 0) { 1613 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1614 if (i == 0) 1615 *cp++ = ':'; 1616 *cp++ = ':'; 1617 dcolon = 1; 1618 } else { 1619 *cp++ = '0'; 1620 *cp++ = ':'; 1621 } 1622 a++; 1623 continue; 1624 } 1625 d = (const u_char *)a; 1626 /* Try to eliminate leading zeros in printout like in :0001. */ 1627 zero = 1; 1628 *cp = digits[*d >> 4]; 1629 if (*cp != '0') { 1630 zero = 0; 1631 cp++; 1632 } 1633 *cp = digits[*d++ & 0xf]; 1634 if (zero == 0 || (*cp != '0')) { 1635 zero = 0; 1636 cp++; 1637 } 1638 *cp = digits[*d >> 4]; 1639 if (zero == 0 || (*cp != '0')) { 1640 zero = 0; 1641 cp++; 1642 } 1643 *cp++ = digits[*d & 0xf]; 1644 *cp++ = ':'; 1645 a++; 1646 } 1647 *--cp = '\0'; 1648 return (ip6buf); 1649} 1650 1651int 1652in6_localaddr(struct in6_addr *in6) 1653{ 1654 struct rm_priotracker in6_ifa_tracker; 1655 struct in6_ifaddr *ia; 1656 1657 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1658 return 1; 1659 1660 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1661 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1662 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1663 &ia->ia_prefixmask.sin6_addr)) { 1664 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1665 return 1; 1666 } 1667 } 1668 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1669 1670 return (0); 1671} 1672 1673/* 1674 * Return 1 if an internet address is for the local host and configured 1675 * on one of its interfaces. 1676 */ 1677int 1678in6_localip(struct in6_addr *in6) 1679{ 1680 struct rm_priotracker in6_ifa_tracker; 1681 struct in6_ifaddr *ia; 1682 1683 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1684 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1685 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1686 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1687 return (1); 1688 } 1689 } 1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1691 return (0); 1692} 1693 1694/* 1695 * Return 1 if an internet address is configured on an interface. 1696 */ 1697int 1698in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1699{ 1700 struct in6_addr in6; 1701 struct ifaddr *ifa; 1702 struct in6_ifaddr *ia6; 1703 1704 in6 = *addr; 1705 if (in6_clearscope(&in6)) 1706 return (0); 1707 in6_setscope(&in6, ifp, NULL); 1708 1709 IF_ADDR_RLOCK(ifp); 1710 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1711 if (ifa->ifa_addr->sa_family != AF_INET6) 1712 continue; 1713 ia6 = (struct in6_ifaddr *)ifa; 1714 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1715 IF_ADDR_RUNLOCK(ifp); 1716 return (1); 1717 } 1718 } 1719 IF_ADDR_RUNLOCK(ifp); 1720 1721 return (0); 1722} 1723 1724int 1725in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1726{ 1727 struct rm_priotracker in6_ifa_tracker; 1728 struct in6_ifaddr *ia; 1729 1730 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1731 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1732 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1733 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1734 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1735 return (1); /* true */ 1736 } 1737 break; 1738 } 1739 } 1740 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1741 1742 return (0); /* false */ 1743} 1744 1745/* 1746 * return length of part which dst and src are equal 1747 * hard coding... 1748 */ 1749int 1750in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1751{ 1752 int match = 0; 1753 u_char *s = (u_char *)src, *d = (u_char *)dst; 1754 u_char *lim = s + 16, r; 1755 1756 while (s < lim) 1757 if ((r = (*d++ ^ *s++)) != 0) { 1758 while (r < 128) { 1759 match++; 1760 r <<= 1; 1761 } 1762 break; 1763 } else 1764 match += 8; 1765 return match; 1766} 1767 1768/* XXX: to be scope conscious */ 1769int 1770in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1771{ 1772 int bytelen, bitlen; 1773 1774 /* sanity check */ 1775 if (0 > len || len > 128) { 1776 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1777 len); 1778 return (0); 1779 } 1780 1781 bytelen = len / 8; 1782 bitlen = len % 8; 1783 1784 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1785 return (0); 1786 if (bitlen != 0 && 1787 p1->s6_addr[bytelen] >> (8 - bitlen) != 1788 p2->s6_addr[bytelen] >> (8 - bitlen)) 1789 return (0); 1790 1791 return (1); 1792} 1793 1794void 1795in6_prefixlen2mask(struct in6_addr *maskp, int len) 1796{ 1797 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1798 int bytelen, bitlen, i; 1799 1800 /* sanity check */ 1801 if (0 > len || len > 128) { 1802 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1803 len); 1804 return; 1805 } 1806 1807 bzero(maskp, sizeof(*maskp)); 1808 bytelen = len / 8; 1809 bitlen = len % 8; 1810 for (i = 0; i < bytelen; i++) 1811 maskp->s6_addr[i] = 0xff; 1812 if (bitlen) 1813 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1814} 1815 1816/* 1817 * return the best address out of the same scope. if no address was 1818 * found, return the first valid address from designated IF. 1819 */ 1820struct in6_ifaddr * 1821in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1822{ 1823 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1824 struct ifaddr *ifa; 1825 struct in6_ifaddr *besta = NULL; 1826 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1827 1828 dep[0] = dep[1] = NULL; 1829 1830 /* 1831 * We first look for addresses in the same scope. 1832 * If there is one, return it. 1833 * If two or more, return one which matches the dst longest. 1834 * If none, return one of global addresses assigned other ifs. 1835 */ 1836 IF_ADDR_RLOCK(ifp); 1837 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1838 if (ifa->ifa_addr->sa_family != AF_INET6) 1839 continue; 1840 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1841 continue; /* XXX: is there any case to allow anycast? */ 1842 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1843 continue; /* don't use this interface */ 1844 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1845 continue; 1846 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1847 if (V_ip6_use_deprecated) 1848 dep[0] = (struct in6_ifaddr *)ifa; 1849 continue; 1850 } 1851 1852 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1853 /* 1854 * call in6_matchlen() as few as possible 1855 */ 1856 if (besta) { 1857 if (blen == -1) 1858 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1859 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1860 if (tlen > blen) { 1861 blen = tlen; 1862 besta = (struct in6_ifaddr *)ifa; 1863 } 1864 } else 1865 besta = (struct in6_ifaddr *)ifa; 1866 } 1867 } 1868 if (besta) { 1869 ifa_ref(&besta->ia_ifa); 1870 IF_ADDR_RUNLOCK(ifp); 1871 return (besta); 1872 } 1873 1874 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1875 if (ifa->ifa_addr->sa_family != AF_INET6) 1876 continue; 1877 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1878 continue; /* XXX: is there any case to allow anycast? */ 1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1880 continue; /* don't use this interface */ 1881 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1882 continue; 1883 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1884 if (V_ip6_use_deprecated) 1885 dep[1] = (struct in6_ifaddr *)ifa; 1886 continue; 1887 } 1888 1889 if (ifa != NULL) 1890 ifa_ref(ifa); 1891 IF_ADDR_RUNLOCK(ifp); 1892 return (struct in6_ifaddr *)ifa; 1893 } 1894 1895 /* use the last-resort values, that are, deprecated addresses */ 1896 if (dep[0]) { 1897 ifa_ref((struct ifaddr *)dep[0]); 1898 IF_ADDR_RUNLOCK(ifp); 1899 return dep[0]; 1900 } 1901 if (dep[1]) { 1902 ifa_ref((struct ifaddr *)dep[1]); 1903 IF_ADDR_RUNLOCK(ifp); 1904 return dep[1]; 1905 } 1906 1907 IF_ADDR_RUNLOCK(ifp); 1908 return NULL; 1909} 1910 1911/* 1912 * perform DAD when interface becomes IFF_UP. 1913 */ 1914void 1915in6_if_up(struct ifnet *ifp) 1916{ 1917 struct ifaddr *ifa; 1918 struct in6_ifaddr *ia; 1919 1920 IF_ADDR_RLOCK(ifp); 1921 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1922 if (ifa->ifa_addr->sa_family != AF_INET6) 1923 continue; 1924 ia = (struct in6_ifaddr *)ifa; 1925 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1926 /* 1927 * The TENTATIVE flag was likely set by hand 1928 * beforehand, implicitly indicating the need for DAD. 1929 * We may be able to skip the random delay in this 1930 * case, but we impose delays just in case. 1931 */ 1932 nd6_dad_start(ifa, 1933 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1934 } 1935 } 1936 IF_ADDR_RUNLOCK(ifp); 1937 1938 /* 1939 * special cases, like 6to4, are handled in in6_ifattach 1940 */ 1941 in6_ifattach(ifp, NULL); 1942} 1943 1944int 1945in6if_do_dad(struct ifnet *ifp) 1946{ 1947 1948 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1949 return (0); 1950 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1951 return (0); 1952 if ((ND_IFINFO(ifp)->flags & 1953 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0) 1954 return (0); 1955 return (1); 1956} 1957 1958/* 1959 * Calculate max IPv6 MTU through all the interfaces and store it 1960 * to in6_maxmtu. 1961 */ 1962void 1963in6_setmaxmtu(void) 1964{ 1965 unsigned long maxmtu = 0; 1966 struct ifnet *ifp; 1967 1968 IFNET_RLOCK_NOSLEEP(); 1969 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1970 /* this function can be called during ifnet initialization */ 1971 if (!ifp->if_afdata[AF_INET6]) 1972 continue; 1973 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1974 IN6_LINKMTU(ifp) > maxmtu) 1975 maxmtu = IN6_LINKMTU(ifp); 1976 } 1977 IFNET_RUNLOCK_NOSLEEP(); 1978 if (maxmtu) /* update only when maxmtu is positive */ 1979 V_in6_maxmtu = maxmtu; 1980} 1981 1982/* 1983 * Provide the length of interface identifiers to be used for the link attached 1984 * to the given interface. The length should be defined in "IPv6 over 1985 * xxx-link" document. Note that address architecture might also define 1986 * the length for a particular set of address prefixes, regardless of the 1987 * link type. As clarified in rfc2462bis, those two definitions should be 1988 * consistent, and those really are as of August 2004. 1989 */ 1990int 1991in6_if2idlen(struct ifnet *ifp) 1992{ 1993 switch (ifp->if_type) { 1994 case IFT_ETHER: /* RFC2464 */ 1995 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 1996 case IFT_L2VLAN: /* ditto */ 1997 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 1998 case IFT_INFINIBAND: 1999 return (64); 2000 case IFT_PPP: /* RFC2472 */ 2001 return (64); 2002 case IFT_FRELAY: /* RFC2590 */ 2003 return (64); 2004 case IFT_IEEE1394: /* RFC3146 */ 2005 return (64); 2006 case IFT_GIF: 2007 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2008 case IFT_LOOP: 2009 return (64); /* XXX: is this really correct? */ 2010 default: 2011 /* 2012 * Unknown link type: 2013 * It might be controversial to use the today's common constant 2014 * of 64 for these cases unconditionally. For full compliance, 2015 * we should return an error in this case. On the other hand, 2016 * if we simply miss the standard for the link type or a new 2017 * standard is defined for a new link type, the IFID length 2018 * is very likely to be the common constant. As a compromise, 2019 * we always use the constant, but make an explicit notice 2020 * indicating the "unknown" case. 2021 */ 2022 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2023 return (64); 2024 } 2025} 2026 2027struct in6_llentry { 2028 struct llentry base; 2029}; 2030 2031#define IN6_LLTBL_DEFAULT_HSIZE 32 2032#define IN6_LLTBL_HASH(k, h) \ 2033 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2034 2035/* 2036 * Do actual deallocation of @lle. 2037 */ 2038static void 2039in6_lltable_destroy_lle_unlocked(epoch_context_t ctx) 2040{ 2041 struct llentry *lle; 2042 2043 lle = __containerof(ctx, struct llentry, lle_epoch_ctx); 2044 LLE_LOCK_DESTROY(lle); 2045 LLE_REQ_DESTROY(lle); 2046 free(lle, M_LLTABLE); 2047} 2048 2049/* 2050 * Called by LLE_FREE_LOCKED when number of references 2051 * drops to zero. 2052 */ 2053static void 2054in6_lltable_destroy_lle(struct llentry *lle) 2055{ 2056 2057 LLE_WUNLOCK(lle); 2058 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked); 2059} 2060 2061static struct llentry * 2062in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2063{ 2064 struct in6_llentry *lle; 2065 2066 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2067 if (lle == NULL) /* NB: caller generates msg */ 2068 return NULL; 2069 2070 lle->base.r_l3addr.addr6 = *addr6; 2071 lle->base.lle_refcnt = 1; 2072 lle->base.lle_free = in6_lltable_destroy_lle; 2073 LLE_LOCK_INIT(&lle->base); 2074 LLE_REQ_INIT(&lle->base); 2075 callout_init(&lle->base.lle_timer, 1); 2076 2077 return (&lle->base); 2078} 2079 2080static int 2081in6_lltable_match_prefix(const struct sockaddr *saddr, 2082 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2083{ 2084 const struct in6_addr *addr, *mask, *lle_addr; 2085 2086 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2087 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2088 lle_addr = &lle->r_l3addr.addr6; 2089 2090 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2091 return (0); 2092 2093 if (lle->la_flags & LLE_IFADDR) { 2094 2095 /* 2096 * Delete LLE_IFADDR records IFF address & flag matches. 2097 * Note that addr is the interface address within prefix 2098 * being matched. 2099 */ 2100 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2101 (flags & LLE_STATIC) != 0) 2102 return (1); 2103 return (0); 2104 } 2105 2106 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2107 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2108 return (1); 2109 2110 return (0); 2111} 2112 2113static void 2114in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2115{ 2116 struct ifnet *ifp; 2117 2118 LLE_WLOCK_ASSERT(lle); 2119 KASSERT(llt != NULL, ("lltable is NULL")); 2120 2121 /* Unlink entry from table */ 2122 if ((lle->la_flags & LLE_LINKED) != 0) { 2123 2124 ifp = llt->llt_ifp; 2125 IF_AFDATA_WLOCK_ASSERT(ifp); 2126 lltable_unlink_entry(llt, lle); 2127 } 2128 2129 llentry_free(lle); 2130} 2131 2132static int 2133in6_lltable_rtcheck(struct ifnet *ifp, 2134 u_int flags, 2135 const struct sockaddr *l3addr) 2136{ 2137 const struct sockaddr_in6 *sin6; 2138 struct nhop6_basic nh6; 2139 struct in6_addr dst; 2140 uint32_t scopeid; 2141 int error; 2142 char ip6buf[INET6_ADDRSTRLEN]; 2143 int fibnum; 2144 2145 KASSERT(l3addr->sa_family == AF_INET6, 2146 ("sin_family %d", l3addr->sa_family)); 2147 2148 sin6 = (const struct sockaddr_in6 *)l3addr; 2149 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2150 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2151 error = fib6_lookup_nh_basic(fibnum, &dst, scopeid, 0, 0, &nh6); 2152 if (error != 0 || (nh6.nh_flags & NHF_GATEWAY) || nh6.nh_ifp != ifp) { 2153 struct ifaddr *ifa; 2154 /* 2155 * Create an ND6 cache for an IPv6 neighbor 2156 * that is not covered by our own prefix. 2157 */ 2158 NET_EPOCH_ENTER(); 2159 ifa = ifaof_ifpforaddr(l3addr, ifp); 2160 if (ifa != NULL) { 2161 NET_EPOCH_EXIT(); 2162 return 0; 2163 } 2164 NET_EPOCH_EXIT(); 2165 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2166 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2167 return EINVAL; 2168 } 2169 return 0; 2170} 2171 2172/* 2173 * Called by the datapath to indicate that the entry was used. 2174 */ 2175static void 2176in6_lltable_mark_used(struct llentry *lle) 2177{ 2178 2179 LLE_REQ_LOCK(lle); 2180 lle->r_skip_req = 0; 2181 2182 /* 2183 * Set the hit time so the callback function 2184 * can determine the remaining time before 2185 * transiting to the DELAY state. 2186 */ 2187 lle->lle_hittime = time_uptime; 2188 LLE_REQ_UNLOCK(lle); 2189} 2190 2191static inline uint32_t 2192in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2193{ 2194 2195 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2196} 2197 2198static uint32_t 2199in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2200{ 2201 2202 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2203} 2204 2205static void 2206in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2207{ 2208 struct sockaddr_in6 *sin6; 2209 2210 sin6 = (struct sockaddr_in6 *)sa; 2211 bzero(sin6, sizeof(*sin6)); 2212 sin6->sin6_family = AF_INET6; 2213 sin6->sin6_len = sizeof(*sin6); 2214 sin6->sin6_addr = lle->r_l3addr.addr6; 2215} 2216 2217static inline struct llentry * 2218in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2219{ 2220 struct llentry *lle; 2221 struct llentries *lleh; 2222 u_int hashidx; 2223 2224 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2225 lleh = &llt->lle_head[hashidx]; 2226 CK_LIST_FOREACH(lle, lleh, lle_next) { 2227 if (lle->la_flags & LLE_DELETED) 2228 continue; 2229 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2230 break; 2231 } 2232 2233 return (lle); 2234} 2235 2236static void 2237in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2238{ 2239 2240 lle->la_flags |= LLE_DELETED; 2241 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2242#ifdef DIAGNOSTIC 2243 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2244#endif 2245 llentry_free(lle); 2246} 2247 2248static struct llentry * 2249in6_lltable_alloc(struct lltable *llt, u_int flags, 2250 const struct sockaddr *l3addr) 2251{ 2252 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2253 struct ifnet *ifp = llt->llt_ifp; 2254 struct llentry *lle; 2255 char linkhdr[LLE_MAX_LINKHDR]; 2256 size_t linkhdrsize; 2257 int lladdr_off; 2258 2259 KASSERT(l3addr->sa_family == AF_INET6, 2260 ("sin_family %d", l3addr->sa_family)); 2261 2262 /* 2263 * A route that covers the given address must have 2264 * been installed 1st because we are doing a resolution, 2265 * verify this. 2266 */ 2267 if (!(flags & LLE_IFADDR) && 2268 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2269 return (NULL); 2270 2271 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2272 if (lle == NULL) { 2273 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2274 return (NULL); 2275 } 2276 lle->la_flags = flags; 2277 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2278 linkhdrsize = LLE_MAX_LINKHDR; 2279 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2280 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2281 epoch_call(net_epoch_preempt, &lle->lle_epoch_ctx, in6_lltable_destroy_lle_unlocked); 2282 return (NULL); 2283 } 2284 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2285 lladdr_off); 2286 lle->la_flags |= LLE_STATIC; 2287 } 2288 2289 if ((lle->la_flags & LLE_STATIC) != 0) 2290 lle->ln_state = ND6_LLINFO_REACHABLE; 2291 2292 return (lle); 2293} 2294 2295static struct llentry * 2296in6_lltable_lookup(struct lltable *llt, u_int flags, 2297 const struct sockaddr *l3addr) 2298{ 2299 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2300 struct llentry *lle; 2301 2302 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2303 KASSERT(l3addr->sa_family == AF_INET6, 2304 ("sin_family %d", l3addr->sa_family)); 2305 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) != 2306 (LLE_UNLOCKED | LLE_EXCLUSIVE), 2307 ("wrong lle request flags: %#x", flags)); 2308 2309 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2310 if (lle == NULL) 2311 return (NULL); 2312 if (flags & LLE_UNLOCKED) 2313 return (lle); 2314 2315 if (flags & LLE_EXCLUSIVE) 2316 LLE_WLOCK(lle); 2317 else 2318 LLE_RLOCK(lle); 2319 2320 /* 2321 * If the afdata lock is not held, the LLE may have been unlinked while 2322 * we were blocked on the LLE lock. Check for this case. 2323 */ 2324 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) { 2325 if (flags & LLE_EXCLUSIVE) 2326 LLE_WUNLOCK(lle); 2327 else 2328 LLE_RUNLOCK(lle); 2329 return (NULL); 2330 } 2331 return (lle); 2332} 2333 2334static int 2335in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2336 struct sysctl_req *wr) 2337{ 2338 struct ifnet *ifp = llt->llt_ifp; 2339 /* XXX stack use */ 2340 struct { 2341 struct rt_msghdr rtm; 2342 struct sockaddr_in6 sin6; 2343 /* 2344 * ndp.c assumes that sdl is word aligned 2345 */ 2346#ifdef __LP64__ 2347 uint32_t pad; 2348#endif 2349 struct sockaddr_dl sdl; 2350 } ndpc; 2351 struct sockaddr_dl *sdl; 2352 int error; 2353 2354 bzero(&ndpc, sizeof(ndpc)); 2355 /* skip deleted entries */ 2356 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2357 return (0); 2358 /* Skip if jailed and not a valid IP of the prison. */ 2359 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6); 2360 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0) 2361 return (0); 2362 /* 2363 * produce a msg made of: 2364 * struct rt_msghdr; 2365 * struct sockaddr_in6 (IPv6) 2366 * struct sockaddr_dl; 2367 */ 2368 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2369 ndpc.rtm.rtm_version = RTM_VERSION; 2370 ndpc.rtm.rtm_type = RTM_GET; 2371 ndpc.rtm.rtm_flags = RTF_UP; 2372 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2373 if (V_deembed_scopeid) 2374 sa6_recoverscope(&ndpc.sin6); 2375 2376 /* publish */ 2377 if (lle->la_flags & LLE_PUB) 2378 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2379 2380 sdl = &ndpc.sdl; 2381 sdl->sdl_family = AF_LINK; 2382 sdl->sdl_len = sizeof(*sdl); 2383 sdl->sdl_index = ifp->if_index; 2384 sdl->sdl_type = ifp->if_type; 2385 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2386 sdl->sdl_alen = ifp->if_addrlen; 2387 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2388 } else { 2389 sdl->sdl_alen = 0; 2390 bzero(LLADDR(sdl), ifp->if_addrlen); 2391 } 2392 if (lle->la_expire != 0) 2393 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2394 lle->lle_remtime / hz + time_second - time_uptime; 2395 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2396 if (lle->la_flags & LLE_STATIC) 2397 ndpc.rtm.rtm_flags |= RTF_STATIC; 2398 if (lle->la_flags & LLE_IFADDR) 2399 ndpc.rtm.rtm_flags |= RTF_PINNED; 2400 if (lle->ln_router != 0) 2401 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2402 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2403 /* Store state in rmx_weight value */ 2404 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2405 ndpc.rtm.rtm_index = ifp->if_index; 2406 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2407 2408 return (error); 2409} 2410 2411static struct lltable * 2412in6_lltattach(struct ifnet *ifp) 2413{ 2414 struct lltable *llt; 2415 2416 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2417 llt->llt_af = AF_INET6; 2418 llt->llt_ifp = ifp; 2419 2420 llt->llt_lookup = in6_lltable_lookup; 2421 llt->llt_alloc_entry = in6_lltable_alloc; 2422 llt->llt_delete_entry = in6_lltable_delete_entry; 2423 llt->llt_dump_entry = in6_lltable_dump_entry; 2424 llt->llt_hash = in6_lltable_hash; 2425 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2426 llt->llt_free_entry = in6_lltable_free_entry; 2427 llt->llt_match_prefix = in6_lltable_match_prefix; 2428 llt->llt_mark_used = in6_lltable_mark_used; 2429 lltable_link(llt); 2430 2431 return (llt); 2432} 2433 2434void * 2435in6_domifattach(struct ifnet *ifp) 2436{ 2437 struct in6_ifextra *ext; 2438 2439 /* There are not IPv6-capable interfaces. */ 2440 switch (ifp->if_type) { 2441 case IFT_PFLOG: 2442 case IFT_PFSYNC: 2443 case IFT_USB: 2444 return (NULL); 2445 } 2446 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2447 bzero(ext, sizeof(*ext)); 2448 2449 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2450 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2451 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2452 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2453 2454 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2455 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2456 M_WAITOK); 2457 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2458 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2459 2460 ext->nd_ifinfo = nd6_ifattach(ifp); 2461 ext->scope6_id = scope6_ifattach(ifp); 2462 ext->lltable = in6_lltattach(ifp); 2463 2464 ext->mld_ifinfo = mld_domifattach(ifp); 2465 2466 return ext; 2467} 2468 2469int 2470in6_domifmtu(struct ifnet *ifp) 2471{ 2472 if (ifp->if_afdata[AF_INET6] == NULL) 2473 return ifp->if_mtu; 2474 2475 return (IN6_LINKMTU(ifp)); 2476} 2477 2478void 2479in6_domifdetach(struct ifnet *ifp, void *aux) 2480{ 2481 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2482 2483 mld_domifdetach(ifp); 2484 scope6_ifdetach(ext->scope6_id); 2485 nd6_ifdetach(ifp, ext->nd_ifinfo); 2486 lltable_free(ext->lltable); 2487 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2488 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2489 free(ext->in6_ifstat, M_IFADDR); 2490 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2491 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2492 free(ext->icmp6_ifstat, M_IFADDR); 2493 free(ext, M_IFADDR); 2494} 2495 2496/* 2497 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2498 * v4 mapped addr or v4 compat addr 2499 */ 2500void 2501in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2502{ 2503 2504 bzero(sin, sizeof(*sin)); 2505 sin->sin_len = sizeof(struct sockaddr_in); 2506 sin->sin_family = AF_INET; 2507 sin->sin_port = sin6->sin6_port; 2508 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2509} 2510 2511/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2512void 2513in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2514{ 2515 bzero(sin6, sizeof(*sin6)); 2516 sin6->sin6_len = sizeof(struct sockaddr_in6); 2517 sin6->sin6_family = AF_INET6; 2518 sin6->sin6_port = sin->sin_port; 2519 sin6->sin6_addr.s6_addr32[0] = 0; 2520 sin6->sin6_addr.s6_addr32[1] = 0; 2521 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2522 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2523} 2524 2525/* Convert sockaddr_in6 into sockaddr_in. */ 2526void 2527in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2528{ 2529 struct sockaddr_in *sin_p; 2530 struct sockaddr_in6 sin6; 2531 2532 /* 2533 * Save original sockaddr_in6 addr and convert it 2534 * to sockaddr_in. 2535 */ 2536 sin6 = *(struct sockaddr_in6 *)nam; 2537 sin_p = (struct sockaddr_in *)nam; 2538 in6_sin6_2_sin(sin_p, &sin6); 2539} 2540 2541/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2542void 2543in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2544{ 2545 struct sockaddr_in *sin_p; 2546 struct sockaddr_in6 *sin6_p; 2547 2548 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2549 sin_p = (struct sockaddr_in *)*nam; 2550 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2551 free(*nam, M_SONAME); 2552 *nam = (struct sockaddr *)sin6_p; 2553} 2554