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/route/nhop.h> 95 #include <net/if_dl.h> 96 #include <net/vnet.h> 97 98 #include <netinet/in.h> 99 #include <netinet/in_var.h> 100 #include <net/if_llatbl.h> 101 #include <netinet/if_ether.h> 102 #include <netinet/in_systm.h> 103 #include <netinet/ip.h> 104 #include <netinet/in_pcb.h> 105 #include <netinet/ip_carp.h> 106 107 #include <netinet/ip6.h> 108 #include <netinet6/ip6_var.h> 109 #include <netinet6/nd6.h> 110 #include <netinet6/mld6_var.h> 111 #include <netinet6/ip6_mroute.h> 112 #include <netinet6/in6_ifattach.h> 113 #include <netinet6/scope6_var.h> 114 #include <netinet6/in6_fib.h> 115 #include <netinet6/in6_pcb.h> 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"); 124 125 VNET_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 */ 131 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 132 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 133 const struct in6_addr in6addr_nodelocal_allnodes = 134 IN6ADDR_NODELOCAL_ALLNODES_INIT; 135 const struct in6_addr in6addr_linklocal_allnodes = 136 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 137 const struct in6_addr in6addr_linklocal_allrouters = 138 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 139 const struct in6_addr in6addr_linklocal_allv2routers = 140 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 141 142 const struct in6_addr in6mask0 = IN6MASK0; 143 const struct in6_addr in6mask32 = IN6MASK32; 144 const struct in6_addr in6mask64 = IN6MASK64; 145 const struct in6_addr in6mask96 = IN6MASK96; 146 const struct in6_addr in6mask128 = IN6MASK128; 147 148 const struct sockaddr_in6 sa6_any = 149 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 150 151 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 152 struct in6_aliasreq *, int); 153 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 154 155 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 156 struct in6_ifaddr *, int); 157 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 158 struct in6_aliasreq *, int flags); 159 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 160 struct in6_ifaddr *, int, int); 161 static 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 void 168 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 169 { 170 struct rt_addrinfo info; 171 struct ifaddr *ifa; 172 struct sockaddr_dl gateway; 173 int fibnum; 174 175 ifa = &ia->ia_ifa; 176 177 /* 178 * Prepare info data for the host route. 179 * This code mimics one from ifa_maintain_loopback_route(). 180 */ 181 bzero(&info, sizeof(struct rt_addrinfo)); 182 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; 183 info.rti_info[RTAX_DST] = ifa->ifa_addr; 184 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway; 185 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type); 186 if (cmd != RTM_DELETE) 187 info.rti_ifp = V_loif; 188 189 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib; 190 191 if (cmd == RTM_ADD) { 192 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 193 rt_routemsg_info(cmd, &info, fibnum); 194 } else if (cmd == RTM_DELETE) { 195 rt_routemsg_info(cmd, &info, fibnum); 196 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 197 } 198 } 199 200 int 201 in6_mask2len(struct in6_addr *mask, u_char *lim0) 202 { 203 int x = 0, y; 204 u_char *lim = lim0, *p; 205 206 /* ignore the scope_id part */ 207 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 208 lim = (u_char *)mask + sizeof(*mask); 209 for (p = (u_char *)mask; p < lim; x++, p++) { 210 if (*p != 0xff) 211 break; 212 } 213 y = 0; 214 if (p < lim) { 215 for (y = 0; y < 8; y++) { 216 if ((*p & (0x80 >> y)) == 0) 217 break; 218 } 219 } 220 221 /* 222 * when the limit pointer is given, do a stricter check on the 223 * remaining bits. 224 */ 225 if (p < lim) { 226 if (y != 0 && (*p & (0x00ff >> y)) != 0) 227 return (-1); 228 for (p = p + 1; p < lim; p++) 229 if (*p != 0) 230 return (-1); 231 } 232 233 return x * 8 + y; 234 } 235 236 #ifdef COMPAT_FREEBSD32 237 struct in6_ndifreq32 { 238 char ifname[IFNAMSIZ]; 239 uint32_t ifindex; 240 }; 241 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 242 #endif 243 244 int 245 in6_control(struct socket *so, u_long cmd, caddr_t data, 246 struct ifnet *ifp, struct thread *td) 247 { 248 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 249 struct in6_ifaddr *ia = NULL; 250 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 251 struct sockaddr_in6 *sa6; 252 int carp_attached = 0; 253 int error; 254 u_long ocmd = cmd; 255 256 /* 257 * Compat to make pre-10.x ifconfig(8) operable. 258 */ 259 if (cmd == OSIOCAIFADDR_IN6) 260 cmd = SIOCAIFADDR_IN6; 261 262 switch (cmd) { 263 case SIOCGETSGCNT_IN6: 264 case SIOCGETMIFCNT_IN6: 265 /* 266 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 267 * We cannot see how that would be needed, so do not adjust the 268 * KPI blindly; more likely should clean up the IPv4 variant. 269 */ 270 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 271 } 272 273 switch (cmd) { 274 case SIOCAADDRCTL_POLICY: 275 case SIOCDADDRCTL_POLICY: 276 if (td != NULL) { 277 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 278 if (error) 279 return (error); 280 } 281 return (in6_src_ioctl(cmd, data)); 282 } 283 284 if (ifp == NULL) 285 return (EOPNOTSUPP); 286 287 switch (cmd) { 288 case SIOCSNDFLUSH_IN6: 289 case SIOCSPFXFLUSH_IN6: 290 case SIOCSRTRFLUSH_IN6: 291 case SIOCSDEFIFACE_IN6: 292 case SIOCSIFINFO_FLAGS: 293 case SIOCSIFINFO_IN6: 294 if (td != NULL) { 295 error = priv_check(td, PRIV_NETINET_ND6); 296 if (error) 297 return (error); 298 } 299 /* FALLTHROUGH */ 300 case OSIOCGIFINFO_IN6: 301 case SIOCGIFINFO_IN6: 302 case SIOCGNBRINFO_IN6: 303 case SIOCGDEFIFACE_IN6: 304 return (nd6_ioctl(cmd, data, ifp)); 305 306 #ifdef COMPAT_FREEBSD32 307 case SIOCGDEFIFACE32_IN6: 308 { 309 struct in6_ndifreq ndif; 310 struct in6_ndifreq32 *ndif32; 311 312 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 313 ifp); 314 if (error) 315 return (error); 316 ndif32 = (struct in6_ndifreq32 *)data; 317 ndif32->ifindex = ndif.ifindex; 318 return (0); 319 } 320 #endif 321 } 322 323 switch (cmd) { 324 case SIOCSIFPREFIX_IN6: 325 case SIOCDIFPREFIX_IN6: 326 case SIOCAIFPREFIX_IN6: 327 case SIOCCIFPREFIX_IN6: 328 case SIOCSGIFPREFIX_IN6: 329 case SIOCGIFPREFIX_IN6: 330 log(LOG_NOTICE, 331 "prefix ioctls are now invalidated. " 332 "please use ifconfig.\n"); 333 return (EOPNOTSUPP); 334 } 335 336 switch (cmd) { 337 case SIOCSSCOPE6: 338 if (td != NULL) { 339 error = priv_check(td, PRIV_NETINET_SCOPE6); 340 if (error) 341 return (error); 342 } 343 /* FALLTHROUGH */ 344 case SIOCGSCOPE6: 345 case SIOCGSCOPE6DEF: 346 return (scope6_ioctl(cmd, data, ifp)); 347 } 348 349 /* 350 * Find address for this interface, if it exists. 351 * 352 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 353 * only, and used the first interface address as the target of other 354 * operations (without checking ifra_addr). This was because netinet 355 * code/API assumed at most 1 interface address per interface. 356 * Since IPv6 allows a node to assign multiple addresses 357 * on a single interface, we almost always look and check the 358 * presence of ifra_addr, and reject invalid ones here. 359 * It also decreases duplicated code among SIOC*_IN6 operations. 360 */ 361 switch (cmd) { 362 case SIOCAIFADDR_IN6: 363 case SIOCSIFPHYADDR_IN6: 364 sa6 = &ifra->ifra_addr; 365 break; 366 case SIOCSIFADDR_IN6: 367 case SIOCGIFADDR_IN6: 368 case SIOCSIFDSTADDR_IN6: 369 case SIOCSIFNETMASK_IN6: 370 case SIOCGIFDSTADDR_IN6: 371 case SIOCGIFNETMASK_IN6: 372 case SIOCDIFADDR_IN6: 373 case SIOCGIFPSRCADDR_IN6: 374 case SIOCGIFPDSTADDR_IN6: 375 case SIOCGIFAFLAG_IN6: 376 case SIOCSNDFLUSH_IN6: 377 case SIOCSPFXFLUSH_IN6: 378 case SIOCSRTRFLUSH_IN6: 379 case SIOCGIFALIFETIME_IN6: 380 case SIOCGIFSTAT_IN6: 381 case SIOCGIFSTAT_ICMP6: 382 sa6 = &ifr->ifr_addr; 383 break; 384 case SIOCSIFADDR: 385 case SIOCSIFBRDADDR: 386 case SIOCSIFDSTADDR: 387 case SIOCSIFNETMASK: 388 /* 389 * Although we should pass any non-INET6 ioctl requests 390 * down to driver, we filter some legacy INET requests. 391 * Drivers trust SIOCSIFADDR et al to come from an already 392 * privileged layer, and do not perform any credentials 393 * checks or input validation. 394 */ 395 return (EINVAL); 396 default: 397 sa6 = NULL; 398 break; 399 } 400 if (sa6 && sa6->sin6_family == AF_INET6) { 401 if (sa6->sin6_scope_id != 0) 402 error = sa6_embedscope(sa6, 0); 403 else 404 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 405 if (error != 0) 406 return (error); 407 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 408 &sa6->sin6_addr)) != 0) 409 return (error); 410 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 411 } else 412 ia = NULL; 413 414 switch (cmd) { 415 case SIOCSIFADDR_IN6: 416 case SIOCSIFDSTADDR_IN6: 417 case SIOCSIFNETMASK_IN6: 418 /* 419 * Since IPv6 allows a node to assign multiple addresses 420 * on a single interface, SIOCSIFxxx ioctls are deprecated. 421 */ 422 /* we decided to obsolete this command (20000704) */ 423 error = EINVAL; 424 goto out; 425 426 case SIOCDIFADDR_IN6: 427 /* 428 * for IPv4, we look for existing in_ifaddr here to allow 429 * "ifconfig if0 delete" to remove the first IPv4 address on 430 * the interface. For IPv6, as the spec allows multiple 431 * interface address from the day one, we consider "remove the 432 * first one" semantics to be not preferable. 433 */ 434 if (ia == NULL) { 435 error = EADDRNOTAVAIL; 436 goto out; 437 } 438 /* FALLTHROUGH */ 439 case SIOCAIFADDR_IN6: 440 /* 441 * We always require users to specify a valid IPv6 address for 442 * the corresponding operation. 443 */ 444 if (ifra->ifra_addr.sin6_family != AF_INET6 || 445 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 446 error = EAFNOSUPPORT; 447 goto out; 448 } 449 450 if (td != NULL) { 451 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 452 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 453 if (error) 454 goto out; 455 } 456 /* FALLTHROUGH */ 457 case SIOCGIFSTAT_IN6: 458 case SIOCGIFSTAT_ICMP6: 459 if (ifp->if_afdata[AF_INET6] == NULL) { 460 error = EPFNOSUPPORT; 461 goto out; 462 } 463 break; 464 465 case SIOCGIFADDR_IN6: 466 /* This interface is basically deprecated. use SIOCGIFCONF. */ 467 /* FALLTHROUGH */ 468 case SIOCGIFAFLAG_IN6: 469 case SIOCGIFNETMASK_IN6: 470 case SIOCGIFDSTADDR_IN6: 471 case SIOCGIFALIFETIME_IN6: 472 /* must think again about its semantics */ 473 if (ia == NULL) { 474 error = EADDRNOTAVAIL; 475 goto out; 476 } 477 break; 478 } 479 480 switch (cmd) { 481 case SIOCGIFADDR_IN6: 482 ifr->ifr_addr = ia->ia_addr; 483 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 484 goto out; 485 break; 486 487 case SIOCGIFDSTADDR_IN6: 488 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 489 error = EINVAL; 490 goto out; 491 } 492 ifr->ifr_dstaddr = ia->ia_dstaddr; 493 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 494 goto out; 495 break; 496 497 case SIOCGIFNETMASK_IN6: 498 ifr->ifr_addr = ia->ia_prefixmask; 499 break; 500 501 case SIOCGIFAFLAG_IN6: 502 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 503 break; 504 505 case SIOCGIFSTAT_IN6: 506 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 507 ifp->if_afdata[AF_INET6])->in6_ifstat, 508 &ifr->ifr_ifru.ifru_stat, 509 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 510 break; 511 512 case SIOCGIFSTAT_ICMP6: 513 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 514 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 515 &ifr->ifr_ifru.ifru_icmp6stat, 516 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 517 break; 518 519 case SIOCGIFALIFETIME_IN6: 520 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 521 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 522 time_t maxexpire; 523 struct in6_addrlifetime *retlt = 524 &ifr->ifr_ifru.ifru_lifetime; 525 526 /* 527 * XXX: adjust expiration time assuming time_t is 528 * signed. 529 */ 530 maxexpire = (-1) & 531 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 532 if (ia->ia6_lifetime.ia6t_vltime < 533 maxexpire - ia->ia6_updatetime) { 534 retlt->ia6t_expire = ia->ia6_updatetime + 535 ia->ia6_lifetime.ia6t_vltime; 536 } else 537 retlt->ia6t_expire = maxexpire; 538 } 539 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 540 time_t maxexpire; 541 struct in6_addrlifetime *retlt = 542 &ifr->ifr_ifru.ifru_lifetime; 543 544 /* 545 * XXX: adjust expiration time assuming time_t is 546 * signed. 547 */ 548 maxexpire = (-1) & 549 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 550 if (ia->ia6_lifetime.ia6t_pltime < 551 maxexpire - ia->ia6_updatetime) { 552 retlt->ia6t_preferred = ia->ia6_updatetime + 553 ia->ia6_lifetime.ia6t_pltime; 554 } else 555 retlt->ia6t_preferred = maxexpire; 556 } 557 break; 558 559 case SIOCAIFADDR_IN6: 560 { 561 struct nd_prefixctl pr0; 562 struct nd_prefix *pr; 563 564 /* 565 * first, make or update the interface address structure, 566 * and link it to the list. 567 */ 568 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 569 goto out; 570 if (ia != NULL) { 571 if (ia->ia_ifa.ifa_carp) 572 (*carp_detach_p)(&ia->ia_ifa, true); 573 ifa_free(&ia->ia_ifa); 574 } 575 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 576 == NULL) { 577 /* 578 * this can happen when the user specify the 0 valid 579 * lifetime. 580 */ 581 break; 582 } 583 584 if (cmd == ocmd && ifra->ifra_vhid > 0) { 585 if (carp_attach_p != NULL) 586 error = (*carp_attach_p)(&ia->ia_ifa, 587 ifra->ifra_vhid); 588 else 589 error = EPROTONOSUPPORT; 590 if (error) 591 goto out; 592 else 593 carp_attached = 1; 594 } 595 596 /* 597 * then, make the prefix on-link on the interface. 598 * XXX: we'd rather create the prefix before the address, but 599 * we need at least one address to install the corresponding 600 * interface route, so we configure the address first. 601 */ 602 603 /* 604 * convert mask to prefix length (prefixmask has already 605 * been validated in in6_update_ifa(). 606 */ 607 bzero(&pr0, sizeof(pr0)); 608 pr0.ndpr_ifp = ifp; 609 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 610 NULL); 611 if (pr0.ndpr_plen == 128) { 612 /* we don't need to install a host route. */ 613 goto aifaddr_out; 614 } 615 pr0.ndpr_prefix = ifra->ifra_addr; 616 /* apply the mask for safety. */ 617 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 618 &ifra->ifra_prefixmask.sin6_addr); 619 620 /* 621 * XXX: since we don't have an API to set prefix (not address) 622 * lifetimes, we just use the same lifetimes as addresses. 623 * The (temporarily) installed lifetimes can be overridden by 624 * later advertised RAs (when accept_rtadv is non 0), which is 625 * an intended behavior. 626 */ 627 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 628 pr0.ndpr_raf_auto = 629 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 630 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 631 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 632 633 /* add the prefix if not yet. */ 634 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 635 /* 636 * nd6_prelist_add will install the corresponding 637 * interface route. 638 */ 639 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 640 if (carp_attached) 641 (*carp_detach_p)(&ia->ia_ifa, false); 642 goto out; 643 } 644 } 645 646 /* relate the address to the prefix */ 647 if (ia->ia6_ndpr == NULL) { 648 ia->ia6_ndpr = pr; 649 pr->ndpr_addrcnt++; 650 651 /* 652 * If this is the first autoconf address from the 653 * prefix, create a temporary address as well 654 * (when required). 655 */ 656 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 657 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 658 int e; 659 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 660 log(LOG_NOTICE, "in6_control: failed " 661 "to create a temporary address, " 662 "errno=%d\n", e); 663 } 664 } 665 } 666 nd6_prefix_rele(pr); 667 668 /* 669 * this might affect the status of autoconfigured addresses, 670 * that is, this address might make other addresses detached. 671 */ 672 pfxlist_onlink_check(); 673 674 aifaddr_out: 675 /* 676 * Try to clear the flag when a new IPv6 address is added 677 * onto an IFDISABLED interface and it succeeds. 678 */ 679 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 680 struct in6_ndireq nd; 681 682 memset(&nd, 0, sizeof(nd)); 683 nd.ndi.flags = ND_IFINFO(ifp)->flags; 684 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 685 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 686 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 687 "SIOCSIFINFO_FLAGS for -ifdisabled " 688 "failed."); 689 /* 690 * Ignore failure of clearing the flag intentionally. 691 * The failure means address duplication was detected. 692 */ 693 } 694 break; 695 } 696 697 case SIOCDIFADDR_IN6: 698 { 699 struct nd_prefix *pr; 700 701 /* 702 * If the address being deleted is the only one that owns 703 * the corresponding prefix, expire the prefix as well. 704 * XXX: theoretically, we don't have to worry about such 705 * relationship, since we separate the address management 706 * and the prefix management. We do this, however, to provide 707 * as much backward compatibility as possible in terms of 708 * the ioctl operation. 709 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 710 */ 711 pr = ia->ia6_ndpr; 712 in6_purgeaddr(&ia->ia_ifa); 713 if (pr != NULL && pr->ndpr_addrcnt == 0) { 714 ND6_WLOCK(); 715 nd6_prefix_unlink(pr, NULL); 716 ND6_WUNLOCK(); 717 nd6_prefix_del(pr); 718 } 719 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 720 IFADDR_EVENT_DEL); 721 break; 722 } 723 724 default: 725 if (ifp->if_ioctl == NULL) { 726 error = EOPNOTSUPP; 727 goto out; 728 } 729 error = (*ifp->if_ioctl)(ifp, cmd, data); 730 goto out; 731 } 732 733 error = 0; 734 out: 735 if (ia != NULL) 736 ifa_free(&ia->ia_ifa); 737 return (error); 738 } 739 740 static struct in6_multi_mship * 741 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr, 742 int *errorp, int delay) 743 { 744 struct in6_multi_mship *imm; 745 int error; 746 747 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT); 748 if (imm == NULL) { 749 *errorp = ENOBUFS; 750 return (NULL); 751 } 752 753 delay = (delay * PR_FASTHZ) / hz; 754 755 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay); 756 if (error) { 757 *errorp = error; 758 free(imm, M_IP6MADDR); 759 return (NULL); 760 } 761 762 return (imm); 763 } 764 /* 765 * Join necessary multicast groups. Factored out from in6_update_ifa(). 766 * This entire work should only be done once, for the default FIB. 767 */ 768 static int 769 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 770 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 771 { 772 char ip6buf[INET6_ADDRSTRLEN]; 773 struct in6_addr mltaddr; 774 struct in6_multi_mship *imm; 775 int delay, error; 776 777 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 778 779 /* Join solicited multicast addr for new host id. */ 780 bzero(&mltaddr, sizeof(struct in6_addr)); 781 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 782 mltaddr.s6_addr32[2] = htonl(1); 783 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 784 mltaddr.s6_addr8[12] = 0xff; 785 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 786 /* XXX: should not happen */ 787 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 788 goto cleanup; 789 } 790 delay = error = 0; 791 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 792 /* 793 * We need a random delay for DAD on the address being 794 * configured. It also means delaying transmission of the 795 * corresponding MLD report to avoid report collision. 796 * [RFC 4861, Section 6.3.7] 797 */ 798 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 799 } 800 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 801 if (imm == NULL) { 802 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 803 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 804 if_name(ifp), error)); 805 goto cleanup; 806 } 807 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 808 *in6m_sol = imm->i6mm_maddr; 809 810 /* 811 * Join link-local all-nodes address. 812 */ 813 mltaddr = in6addr_linklocal_allnodes; 814 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 815 goto cleanup; /* XXX: should not fail */ 816 817 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 818 if (imm == NULL) { 819 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 820 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 821 if_name(ifp), error)); 822 goto cleanup; 823 } 824 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 825 826 /* 827 * Join node information group address. 828 */ 829 delay = 0; 830 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 831 /* 832 * The spec does not say anything about delay for this group, 833 * but the same logic should apply. 834 */ 835 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 836 } 837 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 838 /* XXX jinmei */ 839 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 840 if (imm == NULL) 841 nd6log((LOG_WARNING, 842 "%s: in6_joingroup failed for %s on %s " 843 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 844 &mltaddr), if_name(ifp), error)); 845 /* XXX not very fatal, go on... */ 846 else 847 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 848 } 849 if (V_icmp6_nodeinfo_oldmcprefix && 850 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 851 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 852 if (imm == NULL) 853 nd6log((LOG_WARNING, 854 "%s: in6_joingroup failed for %s on %s " 855 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 856 &mltaddr), if_name(ifp), error)); 857 /* XXX not very fatal, go on... */ 858 else 859 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 860 } 861 862 /* 863 * Join interface-local all-nodes address. 864 * (ff01::1%ifN, and ff01::%ifN/32) 865 */ 866 mltaddr = in6addr_nodelocal_allnodes; 867 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 868 goto cleanup; /* XXX: should not fail */ 869 870 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 871 if (imm == NULL) { 872 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 873 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 874 &mltaddr), if_name(ifp), error)); 875 goto cleanup; 876 } 877 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 878 879 cleanup: 880 return (error); 881 } 882 883 /* 884 * Update parameters of an IPv6 interface address. 885 * If necessary, a new entry is created and linked into address chains. 886 * This function is separated from in6_control(). 887 */ 888 int 889 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 890 struct in6_ifaddr *ia, int flags) 891 { 892 int error, hostIsNew = 0; 893 894 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 895 return (error); 896 897 if (ia == NULL) { 898 hostIsNew = 1; 899 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 900 return (ENOBUFS); 901 } 902 903 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 904 if (error != 0) { 905 if (hostIsNew != 0) { 906 in6_unlink_ifa(ia, ifp); 907 ifa_free(&ia->ia_ifa); 908 } 909 return (error); 910 } 911 912 if (hostIsNew) 913 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 914 915 return (error); 916 } 917 918 /* 919 * Fill in basic IPv6 address request info. 920 */ 921 void 922 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 923 const struct in6_addr *mask) 924 { 925 926 memset(ifra, 0, sizeof(struct in6_aliasreq)); 927 928 ifra->ifra_addr.sin6_family = AF_INET6; 929 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 930 if (addr != NULL) 931 ifra->ifra_addr.sin6_addr = *addr; 932 933 ifra->ifra_prefixmask.sin6_family = AF_INET6; 934 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 935 if (mask != NULL) 936 ifra->ifra_prefixmask.sin6_addr = *mask; 937 } 938 939 static int 940 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 941 struct in6_ifaddr *ia, int flags) 942 { 943 int plen = -1; 944 struct sockaddr_in6 dst6; 945 struct in6_addrlifetime *lt; 946 char ip6buf[INET6_ADDRSTRLEN]; 947 948 /* Validate parameters */ 949 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 950 return (EINVAL); 951 952 /* 953 * The destination address for a p2p link must have a family 954 * of AF_UNSPEC or AF_INET6. 955 */ 956 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 957 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 958 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 959 return (EAFNOSUPPORT); 960 961 /* 962 * Validate address 963 */ 964 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 965 ifra->ifra_addr.sin6_family != AF_INET6) 966 return (EINVAL); 967 968 /* 969 * validate ifra_prefixmask. don't check sin6_family, netmask 970 * does not carry fields other than sin6_len. 971 */ 972 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 973 return (EINVAL); 974 /* 975 * Because the IPv6 address architecture is classless, we require 976 * users to specify a (non 0) prefix length (mask) for a new address. 977 * We also require the prefix (when specified) mask is valid, and thus 978 * reject a non-consecutive mask. 979 */ 980 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 981 return (EINVAL); 982 if (ifra->ifra_prefixmask.sin6_len != 0) { 983 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 984 (u_char *)&ifra->ifra_prefixmask + 985 ifra->ifra_prefixmask.sin6_len); 986 if (plen <= 0) 987 return (EINVAL); 988 } else { 989 /* 990 * In this case, ia must not be NULL. We just use its prefix 991 * length. 992 */ 993 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 994 } 995 /* 996 * If the destination address on a p2p interface is specified, 997 * and the address is a scoped one, validate/set the scope 998 * zone identifier. 999 */ 1000 dst6 = ifra->ifra_dstaddr; 1001 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1002 (dst6.sin6_family == AF_INET6)) { 1003 struct in6_addr in6_tmp; 1004 u_int32_t zoneid; 1005 1006 in6_tmp = dst6.sin6_addr; 1007 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1008 return (EINVAL); /* XXX: should be impossible */ 1009 1010 if (dst6.sin6_scope_id != 0) { 1011 if (dst6.sin6_scope_id != zoneid) 1012 return (EINVAL); 1013 } else /* user omit to specify the ID. */ 1014 dst6.sin6_scope_id = zoneid; 1015 1016 /* convert into the internal form */ 1017 if (sa6_embedscope(&dst6, 0)) 1018 return (EINVAL); /* XXX: should be impossible */ 1019 } 1020 /* Modify original ifra_dstaddr to reflect changes */ 1021 ifra->ifra_dstaddr = dst6; 1022 1023 /* 1024 * The destination address can be specified only for a p2p or a 1025 * loopback interface. If specified, the corresponding prefix length 1026 * must be 128. 1027 */ 1028 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1029 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1030 /* XXX: noisy message */ 1031 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1032 "be specified for a p2p or a loopback IF only\n")); 1033 return (EINVAL); 1034 } 1035 if (plen != 128) { 1036 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1037 "be 128 when dstaddr is specified\n")); 1038 return (EINVAL); 1039 } 1040 } 1041 /* lifetime consistency check */ 1042 lt = &ifra->ifra_lifetime; 1043 if (lt->ia6t_pltime > lt->ia6t_vltime) 1044 return (EINVAL); 1045 if (lt->ia6t_vltime == 0) { 1046 /* 1047 * the following log might be noisy, but this is a typical 1048 * configuration mistake or a tool's bug. 1049 */ 1050 nd6log((LOG_INFO, 1051 "in6_update_ifa: valid lifetime is 0 for %s\n", 1052 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1053 1054 if (ia == NULL) 1055 return (0); /* there's nothing to do */ 1056 } 1057 1058 /* Check prefix mask */ 1059 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1060 /* 1061 * We prohibit changing the prefix length of an existing 1062 * address, because 1063 * + such an operation should be rare in IPv6, and 1064 * + the operation would confuse prefix management. 1065 */ 1066 if (ia->ia_prefixmask.sin6_len != 0 && 1067 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1068 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1069 "of an existing %s address should not be changed\n", 1070 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1071 1072 return (EINVAL); 1073 } 1074 } 1075 1076 return (0); 1077 } 1078 1079 /* 1080 * Allocate a new ifaddr and link it into chains. 1081 */ 1082 static struct in6_ifaddr * 1083 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1084 { 1085 struct in6_ifaddr *ia; 1086 1087 /* 1088 * When in6_alloc_ifa() is called in a process of a received 1089 * RA, it is called under an interrupt context. So, we should 1090 * call malloc with M_NOWAIT. 1091 */ 1092 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1093 if (ia == NULL) 1094 return (NULL); 1095 LIST_INIT(&ia->ia6_memberships); 1096 /* Initialize the address and masks, and put time stamp */ 1097 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1098 ia->ia_addr.sin6_family = AF_INET6; 1099 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1100 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1101 ia->ia_addr = ifra->ifra_addr; 1102 ia->ia6_createtime = time_uptime; 1103 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1104 /* 1105 * Some functions expect that ifa_dstaddr is not 1106 * NULL for p2p interfaces. 1107 */ 1108 ia->ia_ifa.ifa_dstaddr = 1109 (struct sockaddr *)&ia->ia_dstaddr; 1110 } else { 1111 ia->ia_ifa.ifa_dstaddr = NULL; 1112 } 1113 1114 /* set prefix mask if any */ 1115 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1116 if (ifra->ifra_prefixmask.sin6_len != 0) { 1117 ia->ia_prefixmask.sin6_family = AF_INET6; 1118 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1119 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1120 } 1121 1122 ia->ia_ifp = ifp; 1123 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1124 IF_ADDR_WLOCK(ifp); 1125 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1126 IF_ADDR_WUNLOCK(ifp); 1127 1128 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1129 IN6_IFADDR_WLOCK(); 1130 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1131 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1132 IN6_IFADDR_WUNLOCK(); 1133 1134 return (ia); 1135 } 1136 1137 /* 1138 * Update/configure interface address parameters: 1139 * 1140 * 1) Update lifetime 1141 * 2) Update interface metric ad flags 1142 * 3) Notify other subsystems 1143 */ 1144 static int 1145 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1146 struct in6_ifaddr *ia, int hostIsNew, int flags) 1147 { 1148 int error; 1149 1150 /* update timestamp */ 1151 ia->ia6_updatetime = time_uptime; 1152 1153 /* 1154 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1155 * to see if the address is deprecated or invalidated, but initialize 1156 * these members for applications. 1157 */ 1158 ia->ia6_lifetime = ifra->ifra_lifetime; 1159 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1160 ia->ia6_lifetime.ia6t_expire = 1161 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1162 } else 1163 ia->ia6_lifetime.ia6t_expire = 0; 1164 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1165 ia->ia6_lifetime.ia6t_preferred = 1166 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1167 } else 1168 ia->ia6_lifetime.ia6t_preferred = 0; 1169 1170 /* 1171 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1172 * userland, make it deprecated. 1173 */ 1174 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1175 ia->ia6_lifetime.ia6t_pltime = 0; 1176 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1177 } 1178 1179 /* 1180 * configure address flags. 1181 */ 1182 ia->ia6_flags = ifra->ifra_flags; 1183 1184 /* 1185 * Make the address tentative before joining multicast addresses, 1186 * so that corresponding MLD responses would not have a tentative 1187 * source address. 1188 */ 1189 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1190 1191 /* 1192 * DAD should be performed for an new address or addresses on 1193 * an interface with ND6_IFF_IFDISABLED. 1194 */ 1195 if (in6if_do_dad(ifp) && 1196 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1197 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1198 1199 /* notify other subsystems */ 1200 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1201 1202 return (error); 1203 } 1204 1205 /* 1206 * Do link-level ifa job: 1207 * 1) Add lle entry for added address 1208 * 2) Notifies routing socket users about new address 1209 * 3) join appropriate multicast group 1210 * 4) start DAD if enabled 1211 */ 1212 static int 1213 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1214 struct in6_ifaddr *ia, int flags) 1215 { 1216 struct in6_multi *in6m_sol; 1217 int error = 0; 1218 1219 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1220 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1221 in6_purgeaddr(&ia->ia_ifa); 1222 ifa_free(&ia->ia_ifa); 1223 return (error); 1224 } 1225 1226 /* Join necessary multicast groups. */ 1227 in6m_sol = NULL; 1228 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1229 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1230 if (error != 0) { 1231 in6_purgeaddr(&ia->ia_ifa); 1232 ifa_free(&ia->ia_ifa); 1233 return (error); 1234 } 1235 } 1236 1237 /* Perform DAD, if the address is TENTATIVE. */ 1238 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1239 int delay, mindelay, maxdelay; 1240 1241 delay = 0; 1242 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1243 /* 1244 * We need to impose a delay before sending an NS 1245 * for DAD. Check if we also needed a delay for the 1246 * corresponding MLD message. If we did, the delay 1247 * should be larger than the MLD delay (this could be 1248 * relaxed a bit, but this simple logic is at least 1249 * safe). 1250 * XXX: Break data hiding guidelines and look at 1251 * state for the solicited multicast group. 1252 */ 1253 mindelay = 0; 1254 if (in6m_sol != NULL && 1255 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1256 mindelay = in6m_sol->in6m_timer; 1257 } 1258 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1259 if (maxdelay - mindelay == 0) 1260 delay = 0; 1261 else { 1262 delay = 1263 (arc4random() % (maxdelay - mindelay)) + 1264 mindelay; 1265 } 1266 } 1267 nd6_dad_start((struct ifaddr *)ia, delay); 1268 } 1269 1270 in6_newaddrmsg(ia, RTM_ADD); 1271 ifa_free(&ia->ia_ifa); 1272 return (error); 1273 } 1274 1275 void 1276 in6_purgeaddr(struct ifaddr *ifa) 1277 { 1278 struct ifnet *ifp = ifa->ifa_ifp; 1279 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1280 struct in6_multi_mship *imm; 1281 int plen, error; 1282 1283 if (ifa->ifa_carp) 1284 (*carp_detach_p)(ifa, false); 1285 1286 /* 1287 * Remove the loopback route to the interface address. 1288 * The check for the current setting of "nd6_useloopback" 1289 * is not needed. 1290 */ 1291 if (ia->ia_flags & IFA_RTSELF) { 1292 error = ifa_del_loopback_route((struct ifaddr *)ia, 1293 (struct sockaddr *)&ia->ia_addr); 1294 if (error == 0) 1295 ia->ia_flags &= ~IFA_RTSELF; 1296 } 1297 1298 /* stop DAD processing */ 1299 nd6_dad_stop(ifa); 1300 1301 /* Leave multicast groups. */ 1302 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1303 LIST_REMOVE(imm, i6mm_chain); 1304 if (imm->i6mm_maddr != NULL) 1305 in6_leavegroup(imm->i6mm_maddr, NULL); 1306 free(imm, M_IP6MADDR); 1307 } 1308 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1309 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1310 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1311 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1312 if (error != 0) 1313 log(LOG_INFO, "%s: err=%d, destination address delete " 1314 "failed\n", __func__, error); 1315 ia->ia_flags &= ~IFA_ROUTE; 1316 } 1317 1318 in6_newaddrmsg(ia, RTM_DELETE); 1319 in6_unlink_ifa(ia, ifp); 1320 } 1321 1322 static void 1323 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1324 { 1325 char ip6buf[INET6_ADDRSTRLEN]; 1326 int remove_lle; 1327 1328 IF_ADDR_WLOCK(ifp); 1329 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 1330 IF_ADDR_WUNLOCK(ifp); 1331 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1332 1333 /* 1334 * Defer the release of what might be the last reference to the 1335 * in6_ifaddr so that it can't be freed before the remainder of the 1336 * cleanup. 1337 */ 1338 IN6_IFADDR_WLOCK(); 1339 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link); 1340 CK_LIST_REMOVE(ia, ia6_hash); 1341 IN6_IFADDR_WUNLOCK(); 1342 1343 /* 1344 * Release the reference to the base prefix. There should be a 1345 * positive reference. 1346 */ 1347 remove_lle = 0; 1348 if (ia->ia6_ndpr == NULL) { 1349 nd6log((LOG_NOTICE, 1350 "in6_unlink_ifa: autoconf'ed address " 1351 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1352 } else { 1353 ia->ia6_ndpr->ndpr_addrcnt--; 1354 /* Do not delete lles within prefix if refcont != 0 */ 1355 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1356 remove_lle = 1; 1357 ia->ia6_ndpr = NULL; 1358 } 1359 1360 nd6_rem_ifa_lle(ia, remove_lle); 1361 1362 /* 1363 * Also, if the address being removed is autoconf'ed, call 1364 * pfxlist_onlink_check() since the release might affect the status of 1365 * other (detached) addresses. 1366 */ 1367 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1368 pfxlist_onlink_check(); 1369 } 1370 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1371 } 1372 1373 /* 1374 * Notifies other subsystems about address change/arrival: 1375 * 1) Notifies device handler on the first IPv6 address assignment 1376 * 2) Handle routing table changes for P2P links and route 1377 * 3) Handle routing table changes for address host route 1378 */ 1379 static int 1380 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1381 struct in6_aliasreq *ifra, int hostIsNew) 1382 { 1383 int error = 0, plen, ifacount = 0; 1384 struct ifaddr *ifa; 1385 struct sockaddr_in6 *pdst; 1386 char ip6buf[INET6_ADDRSTRLEN]; 1387 1388 /* 1389 * Give the interface a chance to initialize 1390 * if this is its first address, 1391 */ 1392 if (hostIsNew != 0) { 1393 struct epoch_tracker et; 1394 1395 NET_EPOCH_ENTER(et); 1396 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1397 if (ifa->ifa_addr->sa_family != AF_INET6) 1398 continue; 1399 ifacount++; 1400 } 1401 NET_EPOCH_EXIT(et); 1402 } 1403 1404 if (ifacount <= 1 && ifp->if_ioctl) { 1405 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1406 if (error) 1407 goto done; 1408 } 1409 1410 /* 1411 * If a new destination address is specified, scrub the old one and 1412 * install the new destination. Note that the interface must be 1413 * p2p or loopback. 1414 */ 1415 pdst = &ifra->ifra_dstaddr; 1416 if (pdst->sin6_family == AF_INET6 && 1417 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1418 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1419 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1420 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1421 "remove a route to the old destination: %s\n", 1422 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1423 /* proceed anyway... */ 1424 } else 1425 ia->ia_flags &= ~IFA_ROUTE; 1426 ia->ia_dstaddr = *pdst; 1427 } 1428 1429 /* 1430 * If a new destination address is specified for a point-to-point 1431 * interface, install a route to the destination as an interface 1432 * direct route. 1433 * XXX: the logic below rejects assigning multiple addresses on a p2p 1434 * interface that share the same destination. 1435 */ 1436 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1437 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1438 ia->ia_dstaddr.sin6_family == AF_INET6) { 1439 int rtflags = RTF_UP | RTF_HOST; 1440 /* 1441 * Handle the case for ::1 . 1442 */ 1443 if (ifp->if_flags & IFF_LOOPBACK) 1444 ia->ia_flags |= IFA_RTSELF; 1445 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1446 if (error) 1447 goto done; 1448 ia->ia_flags |= IFA_ROUTE; 1449 } 1450 1451 /* 1452 * add a loopback route to self if not exists 1453 */ 1454 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1455 error = ifa_add_loopback_route((struct ifaddr *)ia, 1456 (struct sockaddr *)&ia->ia_addr); 1457 if (error == 0) 1458 ia->ia_flags |= IFA_RTSELF; 1459 } 1460 done: 1461 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1462 "Invoking IPv6 network device address event may sleep"); 1463 1464 ifa_ref(&ia->ia_ifa); 1465 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 1466 IFADDR_EVENT_ADD); 1467 ifa_free(&ia->ia_ifa); 1468 1469 return (error); 1470 } 1471 1472 /* 1473 * Find an IPv6 interface link-local address specific to an interface. 1474 * ifaddr is returned referenced. 1475 */ 1476 struct in6_ifaddr * 1477 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1478 { 1479 struct ifaddr *ifa; 1480 1481 NET_EPOCH_ASSERT(); 1482 1483 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1484 if (ifa->ifa_addr->sa_family != AF_INET6) 1485 continue; 1486 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1487 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1488 ignoreflags) != 0) 1489 continue; 1490 ifa_ref(ifa); 1491 break; 1492 } 1493 } 1494 1495 return ((struct in6_ifaddr *)ifa); 1496 } 1497 1498 /* 1499 * find the interface address corresponding to a given IPv6 address. 1500 * ifaddr is returned referenced. 1501 */ 1502 struct in6_ifaddr * 1503 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1504 { 1505 struct rm_priotracker in6_ifa_tracker; 1506 struct in6_ifaddr *ia; 1507 1508 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1509 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1510 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1511 if (zoneid != 0 && 1512 zoneid != ia->ia_addr.sin6_scope_id) 1513 continue; 1514 ifa_ref(&ia->ia_ifa); 1515 break; 1516 } 1517 } 1518 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1519 return (ia); 1520 } 1521 1522 /* 1523 * find the internet address corresponding to a given interface and address. 1524 * ifaddr is returned referenced. 1525 */ 1526 struct in6_ifaddr * 1527 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1528 { 1529 struct epoch_tracker et; 1530 struct ifaddr *ifa; 1531 1532 NET_EPOCH_ENTER(et); 1533 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1534 if (ifa->ifa_addr->sa_family != AF_INET6) 1535 continue; 1536 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1537 ifa_ref(ifa); 1538 break; 1539 } 1540 } 1541 NET_EPOCH_EXIT(et); 1542 1543 return ((struct in6_ifaddr *)ifa); 1544 } 1545 1546 /* 1547 * Find a link-local scoped address on ifp and return it if any. 1548 */ 1549 struct in6_ifaddr * 1550 in6ifa_llaonifp(struct ifnet *ifp) 1551 { 1552 struct epoch_tracker et; 1553 struct sockaddr_in6 *sin6; 1554 struct ifaddr *ifa; 1555 1556 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1557 return (NULL); 1558 NET_EPOCH_ENTER(et); 1559 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1560 if (ifa->ifa_addr->sa_family != AF_INET6) 1561 continue; 1562 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1563 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1564 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1565 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1566 break; 1567 } 1568 NET_EPOCH_EXIT(et); 1569 1570 return ((struct in6_ifaddr *)ifa); 1571 } 1572 1573 /* 1574 * Convert IP6 address to printable (loggable) representation. Caller 1575 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1576 */ 1577 static char digits[] = "0123456789abcdef"; 1578 char * 1579 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1580 { 1581 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1582 char *cp; 1583 const u_int16_t *a = (const u_int16_t *)addr; 1584 const u_int8_t *d; 1585 int dcolon = 0, zero = 0; 1586 1587 cp = ip6buf; 1588 1589 for (i = 0; i < 8; i++) { 1590 if (*(a + i) == 0) { 1591 cnt++; 1592 if (cnt == 1) 1593 idx = i; 1594 } 1595 else if (maxcnt < cnt) { 1596 maxcnt = cnt; 1597 index = idx; 1598 cnt = 0; 1599 } 1600 } 1601 if (maxcnt < cnt) { 1602 maxcnt = cnt; 1603 index = idx; 1604 } 1605 1606 for (i = 0; i < 8; i++) { 1607 if (dcolon == 1) { 1608 if (*a == 0) { 1609 if (i == 7) 1610 *cp++ = ':'; 1611 a++; 1612 continue; 1613 } else 1614 dcolon = 2; 1615 } 1616 if (*a == 0) { 1617 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1618 if (i == 0) 1619 *cp++ = ':'; 1620 *cp++ = ':'; 1621 dcolon = 1; 1622 } else { 1623 *cp++ = '0'; 1624 *cp++ = ':'; 1625 } 1626 a++; 1627 continue; 1628 } 1629 d = (const u_char *)a; 1630 /* Try to eliminate leading zeros in printout like in :0001. */ 1631 zero = 1; 1632 *cp = digits[*d >> 4]; 1633 if (*cp != '0') { 1634 zero = 0; 1635 cp++; 1636 } 1637 *cp = digits[*d++ & 0xf]; 1638 if (zero == 0 || (*cp != '0')) { 1639 zero = 0; 1640 cp++; 1641 } 1642 *cp = digits[*d >> 4]; 1643 if (zero == 0 || (*cp != '0')) { 1644 zero = 0; 1645 cp++; 1646 } 1647 *cp++ = digits[*d & 0xf]; 1648 *cp++ = ':'; 1649 a++; 1650 } 1651 *--cp = '\0'; 1652 return (ip6buf); 1653 } 1654 1655 int 1656 in6_localaddr(struct in6_addr *in6) 1657 { 1658 struct rm_priotracker in6_ifa_tracker; 1659 struct in6_ifaddr *ia; 1660 1661 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1662 return 1; 1663 1664 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1665 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1666 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1667 &ia->ia_prefixmask.sin6_addr)) { 1668 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1669 return 1; 1670 } 1671 } 1672 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1673 1674 return (0); 1675 } 1676 1677 /* 1678 * Return 1 if an internet address is for the local host and configured 1679 * on one of its interfaces. 1680 */ 1681 int 1682 in6_localip(struct in6_addr *in6) 1683 { 1684 struct rm_priotracker in6_ifa_tracker; 1685 struct in6_ifaddr *ia; 1686 1687 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1688 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1689 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1691 return (1); 1692 } 1693 } 1694 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1695 return (0); 1696 } 1697 1698 /* 1699 * Return 1 if an internet address is configured on an interface. 1700 */ 1701 int 1702 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1703 { 1704 struct in6_addr in6; 1705 struct ifaddr *ifa; 1706 struct in6_ifaddr *ia6; 1707 1708 NET_EPOCH_ASSERT(); 1709 1710 in6 = *addr; 1711 if (in6_clearscope(&in6)) 1712 return (0); 1713 in6_setscope(&in6, ifp, NULL); 1714 1715 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1716 if (ifa->ifa_addr->sa_family != AF_INET6) 1717 continue; 1718 ia6 = (struct in6_ifaddr *)ifa; 1719 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) 1720 return (1); 1721 } 1722 1723 return (0); 1724 } 1725 1726 int 1727 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1728 { 1729 struct rm_priotracker in6_ifa_tracker; 1730 struct in6_ifaddr *ia; 1731 1732 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1733 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1734 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1735 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1736 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1737 return (1); /* true */ 1738 } 1739 break; 1740 } 1741 } 1742 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1743 1744 return (0); /* false */ 1745 } 1746 1747 /* 1748 * return length of part which dst and src are equal 1749 * hard coding... 1750 */ 1751 int 1752 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1753 { 1754 int match = 0; 1755 u_char *s = (u_char *)src, *d = (u_char *)dst; 1756 u_char *lim = s + 16, r; 1757 1758 while (s < lim) 1759 if ((r = (*d++ ^ *s++)) != 0) { 1760 while (r < 128) { 1761 match++; 1762 r <<= 1; 1763 } 1764 break; 1765 } else 1766 match += 8; 1767 return match; 1768 } 1769 1770 /* XXX: to be scope conscious */ 1771 int 1772 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1773 { 1774 int bytelen, bitlen; 1775 1776 /* sanity check */ 1777 if (0 > len || len > 128) { 1778 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1779 len); 1780 return (0); 1781 } 1782 1783 bytelen = len / 8; 1784 bitlen = len % 8; 1785 1786 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1787 return (0); 1788 if (bitlen != 0 && 1789 p1->s6_addr[bytelen] >> (8 - bitlen) != 1790 p2->s6_addr[bytelen] >> (8 - bitlen)) 1791 return (0); 1792 1793 return (1); 1794 } 1795 1796 void 1797 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1798 { 1799 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1800 int bytelen, bitlen, i; 1801 1802 /* sanity check */ 1803 if (0 > len || len > 128) { 1804 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1805 len); 1806 return; 1807 } 1808 1809 bzero(maskp, sizeof(*maskp)); 1810 bytelen = len / 8; 1811 bitlen = len % 8; 1812 for (i = 0; i < bytelen; i++) 1813 maskp->s6_addr[i] = 0xff; 1814 if (bitlen) 1815 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1816 } 1817 1818 /* 1819 * return the best address out of the same scope. if no address was 1820 * found, return the first valid address from designated IF. 1821 */ 1822 struct in6_ifaddr * 1823 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1824 { 1825 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1826 struct ifaddr *ifa; 1827 struct in6_ifaddr *besta = NULL; 1828 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1829 1830 NET_EPOCH_ASSERT(); 1831 1832 dep[0] = dep[1] = NULL; 1833 1834 /* 1835 * We first look for addresses in the same scope. 1836 * If there is one, return it. 1837 * If two or more, return one which matches the dst longest. 1838 * If none, return one of global addresses assigned other ifs. 1839 */ 1840 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1841 if (ifa->ifa_addr->sa_family != AF_INET6) 1842 continue; 1843 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1844 continue; /* XXX: is there any case to allow anycast? */ 1845 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1846 continue; /* don't use this interface */ 1847 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1848 continue; 1849 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1850 if (V_ip6_use_deprecated) 1851 dep[0] = (struct in6_ifaddr *)ifa; 1852 continue; 1853 } 1854 1855 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1856 /* 1857 * call in6_matchlen() as few as possible 1858 */ 1859 if (besta) { 1860 if (blen == -1) 1861 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1862 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1863 if (tlen > blen) { 1864 blen = tlen; 1865 besta = (struct in6_ifaddr *)ifa; 1866 } 1867 } else 1868 besta = (struct in6_ifaddr *)ifa; 1869 } 1870 } 1871 if (besta) { 1872 ifa_ref(&besta->ia_ifa); 1873 return (besta); 1874 } 1875 1876 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1877 if (ifa->ifa_addr->sa_family != AF_INET6) 1878 continue; 1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1880 continue; /* XXX: is there any case to allow anycast? */ 1881 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1882 continue; /* don't use this interface */ 1883 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1884 continue; 1885 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1886 if (V_ip6_use_deprecated) 1887 dep[1] = (struct in6_ifaddr *)ifa; 1888 continue; 1889 } 1890 1891 if (ifa != NULL) 1892 ifa_ref(ifa); 1893 return (struct in6_ifaddr *)ifa; 1894 } 1895 1896 /* use the last-resort values, that are, deprecated addresses */ 1897 if (dep[0]) { 1898 ifa_ref((struct ifaddr *)dep[0]); 1899 return dep[0]; 1900 } 1901 if (dep[1]) { 1902 ifa_ref((struct ifaddr *)dep[1]); 1903 return dep[1]; 1904 } 1905 1906 return NULL; 1907 } 1908 1909 /* 1910 * perform DAD when interface becomes IFF_UP. 1911 */ 1912 void 1913 in6_if_up(struct ifnet *ifp) 1914 { 1915 struct epoch_tracker et; 1916 struct ifaddr *ifa; 1917 struct in6_ifaddr *ia; 1918 1919 NET_EPOCH_ENTER(et); 1920 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1921 if (ifa->ifa_addr->sa_family != AF_INET6) 1922 continue; 1923 ia = (struct in6_ifaddr *)ifa; 1924 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1925 /* 1926 * The TENTATIVE flag was likely set by hand 1927 * beforehand, implicitly indicating the need for DAD. 1928 * We may be able to skip the random delay in this 1929 * case, but we impose delays just in case. 1930 */ 1931 nd6_dad_start(ifa, 1932 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1933 } 1934 } 1935 NET_EPOCH_EXIT(et); 1936 1937 /* 1938 * special cases, like 6to4, are handled in in6_ifattach 1939 */ 1940 in6_ifattach(ifp, NULL); 1941 } 1942 1943 int 1944 in6if_do_dad(struct ifnet *ifp) 1945 { 1946 1947 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1948 return (0); 1949 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1950 return (0); 1951 if ((ND_IFINFO(ifp)->flags & 1952 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0) 1953 return (0); 1954 return (1); 1955 } 1956 1957 /* 1958 * Calculate max IPv6 MTU through all the interfaces and store it 1959 * to in6_maxmtu. 1960 */ 1961 void 1962 in6_setmaxmtu(void) 1963 { 1964 struct epoch_tracker et; 1965 unsigned long maxmtu = 0; 1966 struct ifnet *ifp; 1967 1968 NET_EPOCH_ENTER(et); 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 NET_EPOCH_EXIT(et); 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 */ 1990 int 1991 in6_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 2027 struct 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 */ 2038 static void 2039 in6_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 */ 2053 static void 2054 in6_lltable_destroy_lle(struct llentry *lle) 2055 { 2056 2057 LLE_WUNLOCK(lle); 2058 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2059 } 2060 2061 static struct llentry * 2062 in6_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 2080 static int 2081 in6_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 * Delete LLE_IFADDR records IFF address & flag matches. 2096 * Note that addr is the interface address within prefix 2097 * being matched. 2098 */ 2099 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2100 (flags & LLE_STATIC) != 0) 2101 return (1); 2102 return (0); 2103 } 2104 2105 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2106 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2107 return (1); 2108 2109 return (0); 2110 } 2111 2112 static void 2113 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2114 { 2115 struct ifnet *ifp; 2116 2117 LLE_WLOCK_ASSERT(lle); 2118 KASSERT(llt != NULL, ("lltable is NULL")); 2119 2120 /* Unlink entry from table */ 2121 if ((lle->la_flags & LLE_LINKED) != 0) { 2122 ifp = llt->llt_ifp; 2123 IF_AFDATA_WLOCK_ASSERT(ifp); 2124 lltable_unlink_entry(llt, lle); 2125 } 2126 2127 llentry_free(lle); 2128 } 2129 2130 static int 2131 in6_lltable_rtcheck(struct ifnet *ifp, 2132 u_int flags, 2133 const struct sockaddr *l3addr) 2134 { 2135 const struct sockaddr_in6 *sin6; 2136 struct nhop_object *nh; 2137 struct in6_addr dst; 2138 uint32_t scopeid; 2139 char ip6buf[INET6_ADDRSTRLEN]; 2140 int fibnum; 2141 2142 NET_EPOCH_ASSERT(); 2143 KASSERT(l3addr->sa_family == AF_INET6, 2144 ("sin_family %d", l3addr->sa_family)); 2145 2146 sin6 = (const struct sockaddr_in6 *)l3addr; 2147 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2148 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2149 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0); 2150 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) { 2151 struct ifaddr *ifa; 2152 /* 2153 * Create an ND6 cache for an IPv6 neighbor 2154 * that is not covered by our own prefix. 2155 */ 2156 ifa = ifaof_ifpforaddr(l3addr, ifp); 2157 if (ifa != NULL) { 2158 return 0; 2159 } 2160 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2161 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2162 return EINVAL; 2163 } 2164 return 0; 2165 } 2166 2167 /* 2168 * Called by the datapath to indicate that the entry was used. 2169 */ 2170 static void 2171 in6_lltable_mark_used(struct llentry *lle) 2172 { 2173 2174 LLE_REQ_LOCK(lle); 2175 lle->r_skip_req = 0; 2176 2177 /* 2178 * Set the hit time so the callback function 2179 * can determine the remaining time before 2180 * transiting to the DELAY state. 2181 */ 2182 lle->lle_hittime = time_uptime; 2183 LLE_REQ_UNLOCK(lle); 2184 } 2185 2186 static inline uint32_t 2187 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2188 { 2189 2190 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2191 } 2192 2193 static uint32_t 2194 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2195 { 2196 2197 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2198 } 2199 2200 static void 2201 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2202 { 2203 struct sockaddr_in6 *sin6; 2204 2205 sin6 = (struct sockaddr_in6 *)sa; 2206 bzero(sin6, sizeof(*sin6)); 2207 sin6->sin6_family = AF_INET6; 2208 sin6->sin6_len = sizeof(*sin6); 2209 sin6->sin6_addr = lle->r_l3addr.addr6; 2210 } 2211 2212 static inline struct llentry * 2213 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2214 { 2215 struct llentry *lle; 2216 struct llentries *lleh; 2217 u_int hashidx; 2218 2219 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2220 lleh = &llt->lle_head[hashidx]; 2221 CK_LIST_FOREACH(lle, lleh, lle_next) { 2222 if (lle->la_flags & LLE_DELETED) 2223 continue; 2224 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2225 break; 2226 } 2227 2228 return (lle); 2229 } 2230 2231 static void 2232 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2233 { 2234 2235 lle->la_flags |= LLE_DELETED; 2236 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2237 #ifdef DIAGNOSTIC 2238 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2239 #endif 2240 llentry_free(lle); 2241 } 2242 2243 static struct llentry * 2244 in6_lltable_alloc(struct lltable *llt, u_int flags, 2245 const struct sockaddr *l3addr) 2246 { 2247 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2248 struct ifnet *ifp = llt->llt_ifp; 2249 struct llentry *lle; 2250 char linkhdr[LLE_MAX_LINKHDR]; 2251 size_t linkhdrsize; 2252 int lladdr_off; 2253 2254 KASSERT(l3addr->sa_family == AF_INET6, 2255 ("sin_family %d", l3addr->sa_family)); 2256 2257 /* 2258 * A route that covers the given address must have 2259 * been installed 1st because we are doing a resolution, 2260 * verify this. 2261 */ 2262 if (!(flags & LLE_IFADDR) && 2263 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2264 return (NULL); 2265 2266 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2267 if (lle == NULL) { 2268 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2269 return (NULL); 2270 } 2271 lle->la_flags = flags; 2272 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2273 linkhdrsize = LLE_MAX_LINKHDR; 2274 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2275 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2276 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2277 return (NULL); 2278 } 2279 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2280 lladdr_off); 2281 lle->la_flags |= LLE_STATIC; 2282 } 2283 2284 if ((lle->la_flags & LLE_STATIC) != 0) 2285 lle->ln_state = ND6_LLINFO_REACHABLE; 2286 2287 return (lle); 2288 } 2289 2290 static struct llentry * 2291 in6_lltable_lookup(struct lltable *llt, u_int flags, 2292 const struct sockaddr *l3addr) 2293 { 2294 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2295 struct llentry *lle; 2296 2297 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2298 KASSERT(l3addr->sa_family == AF_INET6, 2299 ("sin_family %d", l3addr->sa_family)); 2300 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) != 2301 (LLE_UNLOCKED | LLE_EXCLUSIVE), 2302 ("wrong lle request flags: %#x", flags)); 2303 2304 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2305 if (lle == NULL) 2306 return (NULL); 2307 if (flags & LLE_UNLOCKED) 2308 return (lle); 2309 2310 if (flags & LLE_EXCLUSIVE) 2311 LLE_WLOCK(lle); 2312 else 2313 LLE_RLOCK(lle); 2314 2315 /* 2316 * If the afdata lock is not held, the LLE may have been unlinked while 2317 * we were blocked on the LLE lock. Check for this case. 2318 */ 2319 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) { 2320 if (flags & LLE_EXCLUSIVE) 2321 LLE_WUNLOCK(lle); 2322 else 2323 LLE_RUNLOCK(lle); 2324 return (NULL); 2325 } 2326 return (lle); 2327 } 2328 2329 static int 2330 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2331 struct sysctl_req *wr) 2332 { 2333 struct ifnet *ifp = llt->llt_ifp; 2334 /* XXX stack use */ 2335 struct { 2336 struct rt_msghdr rtm; 2337 struct sockaddr_in6 sin6; 2338 /* 2339 * ndp.c assumes that sdl is word aligned 2340 */ 2341 #ifdef __LP64__ 2342 uint32_t pad; 2343 #endif 2344 struct sockaddr_dl sdl; 2345 } ndpc; 2346 struct sockaddr_dl *sdl; 2347 int error; 2348 2349 bzero(&ndpc, sizeof(ndpc)); 2350 /* skip deleted entries */ 2351 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2352 return (0); 2353 /* Skip if jailed and not a valid IP of the prison. */ 2354 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6); 2355 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0) 2356 return (0); 2357 /* 2358 * produce a msg made of: 2359 * struct rt_msghdr; 2360 * struct sockaddr_in6 (IPv6) 2361 * struct sockaddr_dl; 2362 */ 2363 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2364 ndpc.rtm.rtm_version = RTM_VERSION; 2365 ndpc.rtm.rtm_type = RTM_GET; 2366 ndpc.rtm.rtm_flags = RTF_UP; 2367 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2368 sa6_recoverscope(&ndpc.sin6); 2369 2370 /* publish */ 2371 if (lle->la_flags & LLE_PUB) 2372 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2373 2374 sdl = &ndpc.sdl; 2375 sdl->sdl_family = AF_LINK; 2376 sdl->sdl_len = sizeof(*sdl); 2377 sdl->sdl_index = ifp->if_index; 2378 sdl->sdl_type = ifp->if_type; 2379 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2380 sdl->sdl_alen = ifp->if_addrlen; 2381 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2382 } else { 2383 sdl->sdl_alen = 0; 2384 bzero(LLADDR(sdl), ifp->if_addrlen); 2385 } 2386 if (lle->la_expire != 0) 2387 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2388 lle->lle_remtime / hz + time_second - time_uptime; 2389 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2390 if (lle->la_flags & LLE_STATIC) 2391 ndpc.rtm.rtm_flags |= RTF_STATIC; 2392 if (lle->la_flags & LLE_IFADDR) 2393 ndpc.rtm.rtm_flags |= RTF_PINNED; 2394 if (lle->ln_router != 0) 2395 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2396 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2397 /* Store state in rmx_weight value */ 2398 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2399 ndpc.rtm.rtm_index = ifp->if_index; 2400 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2401 2402 return (error); 2403 } 2404 2405 static struct lltable * 2406 in6_lltattach(struct ifnet *ifp) 2407 { 2408 struct lltable *llt; 2409 2410 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2411 llt->llt_af = AF_INET6; 2412 llt->llt_ifp = ifp; 2413 2414 llt->llt_lookup = in6_lltable_lookup; 2415 llt->llt_alloc_entry = in6_lltable_alloc; 2416 llt->llt_delete_entry = in6_lltable_delete_entry; 2417 llt->llt_dump_entry = in6_lltable_dump_entry; 2418 llt->llt_hash = in6_lltable_hash; 2419 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2420 llt->llt_free_entry = in6_lltable_free_entry; 2421 llt->llt_match_prefix = in6_lltable_match_prefix; 2422 llt->llt_mark_used = in6_lltable_mark_used; 2423 lltable_link(llt); 2424 2425 return (llt); 2426 } 2427 2428 void * 2429 in6_domifattach(struct ifnet *ifp) 2430 { 2431 struct in6_ifextra *ext; 2432 2433 /* There are not IPv6-capable interfaces. */ 2434 switch (ifp->if_type) { 2435 case IFT_PFLOG: 2436 case IFT_PFSYNC: 2437 case IFT_USB: 2438 return (NULL); 2439 } 2440 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2441 bzero(ext, sizeof(*ext)); 2442 2443 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2444 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2445 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2446 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2447 2448 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2449 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2450 M_WAITOK); 2451 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2452 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2453 2454 ext->nd_ifinfo = nd6_ifattach(ifp); 2455 ext->scope6_id = scope6_ifattach(ifp); 2456 ext->lltable = in6_lltattach(ifp); 2457 2458 ext->mld_ifinfo = mld_domifattach(ifp); 2459 2460 return ext; 2461 } 2462 2463 int 2464 in6_domifmtu(struct ifnet *ifp) 2465 { 2466 if (ifp->if_afdata[AF_INET6] == NULL) 2467 return ifp->if_mtu; 2468 2469 return (IN6_LINKMTU(ifp)); 2470 } 2471 2472 void 2473 in6_domifdetach(struct ifnet *ifp, void *aux) 2474 { 2475 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2476 2477 mld_domifdetach(ifp); 2478 scope6_ifdetach(ext->scope6_id); 2479 nd6_ifdetach(ifp, ext->nd_ifinfo); 2480 lltable_free(ext->lltable); 2481 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2482 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2483 free(ext->in6_ifstat, M_IFADDR); 2484 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2485 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2486 free(ext->icmp6_ifstat, M_IFADDR); 2487 free(ext, M_IFADDR); 2488 } 2489 2490 /* 2491 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2492 * v4 mapped addr or v4 compat addr 2493 */ 2494 void 2495 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2496 { 2497 2498 bzero(sin, sizeof(*sin)); 2499 sin->sin_len = sizeof(struct sockaddr_in); 2500 sin->sin_family = AF_INET; 2501 sin->sin_port = sin6->sin6_port; 2502 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2503 } 2504 2505 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2506 void 2507 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2508 { 2509 bzero(sin6, sizeof(*sin6)); 2510 sin6->sin6_len = sizeof(struct sockaddr_in6); 2511 sin6->sin6_family = AF_INET6; 2512 sin6->sin6_port = sin->sin_port; 2513 sin6->sin6_addr.s6_addr32[0] = 0; 2514 sin6->sin6_addr.s6_addr32[1] = 0; 2515 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2516 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2517 } 2518 2519 /* Convert sockaddr_in6 into sockaddr_in. */ 2520 void 2521 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2522 { 2523 struct sockaddr_in *sin_p; 2524 struct sockaddr_in6 sin6; 2525 2526 /* 2527 * Save original sockaddr_in6 addr and convert it 2528 * to sockaddr_in. 2529 */ 2530 sin6 = *(struct sockaddr_in6 *)nam; 2531 sin_p = (struct sockaddr_in *)nam; 2532 in6_sin6_2_sin(sin_p, &sin6); 2533 } 2534 2535 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2536 void 2537 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2538 { 2539 struct sockaddr_in *sin_p; 2540 struct sockaddr_in6 *sin6_p; 2541 2542 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2543 sin_p = (struct sockaddr_in *)*nam; 2544 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2545 free(*nam, M_SONAME); 2546 *nam = (struct sockaddr *)sin6_p; 2547 } 2548