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 /* 119 * struct in6_ifreq and struct ifreq must be type punnable for common members 120 * of ifr_ifru to allow accessors to be shared. 121 */ 122 _Static_assert(offsetof(struct in6_ifreq, ifr_ifru) == 123 offsetof(struct ifreq, ifr_ifru), 124 "struct in6_ifreq and struct ifreq are not type punnable"); 125 126 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 127 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 128 129 /* 130 * Definitions of some costant IP6 addresses. 131 */ 132 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 133 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 134 const struct in6_addr in6addr_nodelocal_allnodes = 135 IN6ADDR_NODELOCAL_ALLNODES_INIT; 136 const struct in6_addr in6addr_linklocal_allnodes = 137 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 138 const struct in6_addr in6addr_linklocal_allrouters = 139 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 140 const struct in6_addr in6addr_linklocal_allv2routers = 141 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 142 143 const struct in6_addr in6mask0 = IN6MASK0; 144 const struct in6_addr in6mask32 = IN6MASK32; 145 const struct in6_addr in6mask64 = IN6MASK64; 146 const struct in6_addr in6mask96 = IN6MASK96; 147 const struct in6_addr in6mask128 = IN6MASK128; 148 149 const struct sockaddr_in6 sa6_any = 150 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 151 152 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 153 struct in6_aliasreq *, int); 154 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 155 156 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 157 struct in6_ifaddr *, int); 158 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 159 struct in6_aliasreq *, int flags); 160 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 161 struct in6_ifaddr *, int, int); 162 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 163 struct in6_ifaddr *, int); 164 165 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 166 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 167 168 169 void 170 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 171 { 172 struct rt_addrinfo info; 173 struct ifaddr *ifa; 174 struct sockaddr_dl gateway; 175 int fibnum; 176 177 ifa = &ia->ia_ifa; 178 179 /* 180 * Prepare info data for the host route. 181 * This code mimics one from ifa_maintain_loopback_route(). 182 */ 183 bzero(&info, sizeof(struct rt_addrinfo)); 184 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; 185 info.rti_info[RTAX_DST] = ifa->ifa_addr; 186 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway; 187 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type); 188 if (cmd != RTM_DELETE) 189 info.rti_ifp = V_loif; 190 191 192 fibnum = V_rt_add_addr_allfibs ? RT_ALL_FIBS : ia62ifa(ia)->ifa_ifp->if_fib; 193 194 if (cmd == RTM_ADD) { 195 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 196 rt_routemsg_info(cmd, &info, fibnum); 197 } else if (cmd == RTM_DELETE) { 198 rt_routemsg_info(cmd, &info, fibnum); 199 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 200 } 201 } 202 203 int 204 in6_mask2len(struct in6_addr *mask, u_char *lim0) 205 { 206 int x = 0, y; 207 u_char *lim = lim0, *p; 208 209 /* ignore the scope_id part */ 210 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 211 lim = (u_char *)mask + sizeof(*mask); 212 for (p = (u_char *)mask; p < lim; x++, p++) { 213 if (*p != 0xff) 214 break; 215 } 216 y = 0; 217 if (p < lim) { 218 for (y = 0; y < 8; y++) { 219 if ((*p & (0x80 >> y)) == 0) 220 break; 221 } 222 } 223 224 /* 225 * when the limit pointer is given, do a stricter check on the 226 * remaining bits. 227 */ 228 if (p < lim) { 229 if (y != 0 && (*p & (0x00ff >> y)) != 0) 230 return (-1); 231 for (p = p + 1; p < lim; p++) 232 if (*p != 0) 233 return (-1); 234 } 235 236 return x * 8 + y; 237 } 238 239 #ifdef COMPAT_FREEBSD32 240 struct in6_ndifreq32 { 241 char ifname[IFNAMSIZ]; 242 uint32_t ifindex; 243 }; 244 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 245 #endif 246 247 int 248 in6_control(struct socket *so, u_long cmd, caddr_t data, 249 struct ifnet *ifp, struct thread *td) 250 { 251 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 252 struct in6_ifaddr *ia = NULL; 253 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 254 struct sockaddr_in6 *sa6; 255 int carp_attached = 0; 256 int error; 257 u_long ocmd = cmd; 258 259 /* 260 * Compat to make pre-10.x ifconfig(8) operable. 261 */ 262 if (cmd == OSIOCAIFADDR_IN6) 263 cmd = SIOCAIFADDR_IN6; 264 265 switch (cmd) { 266 case SIOCGETSGCNT_IN6: 267 case SIOCGETMIFCNT_IN6: 268 /* 269 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 270 * We cannot see how that would be needed, so do not adjust the 271 * KPI blindly; more likely should clean up the IPv4 variant. 272 */ 273 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 274 } 275 276 switch (cmd) { 277 case SIOCAADDRCTL_POLICY: 278 case SIOCDADDRCTL_POLICY: 279 if (td != NULL) { 280 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 281 if (error) 282 return (error); 283 } 284 return (in6_src_ioctl(cmd, data)); 285 } 286 287 if (ifp == NULL) 288 return (EOPNOTSUPP); 289 290 switch (cmd) { 291 case SIOCSNDFLUSH_IN6: 292 case SIOCSPFXFLUSH_IN6: 293 case SIOCSRTRFLUSH_IN6: 294 case SIOCSDEFIFACE_IN6: 295 case SIOCSIFINFO_FLAGS: 296 case SIOCSIFINFO_IN6: 297 if (td != NULL) { 298 error = priv_check(td, PRIV_NETINET_ND6); 299 if (error) 300 return (error); 301 } 302 /* FALLTHROUGH */ 303 case OSIOCGIFINFO_IN6: 304 case SIOCGIFINFO_IN6: 305 case SIOCGNBRINFO_IN6: 306 case SIOCGDEFIFACE_IN6: 307 return (nd6_ioctl(cmd, data, ifp)); 308 309 #ifdef COMPAT_FREEBSD32 310 case SIOCGDEFIFACE32_IN6: 311 { 312 struct in6_ndifreq ndif; 313 struct in6_ndifreq32 *ndif32; 314 315 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 316 ifp); 317 if (error) 318 return (error); 319 ndif32 = (struct in6_ndifreq32 *)data; 320 ndif32->ifindex = ndif.ifindex; 321 return (0); 322 } 323 #endif 324 } 325 326 switch (cmd) { 327 case SIOCSIFPREFIX_IN6: 328 case SIOCDIFPREFIX_IN6: 329 case SIOCAIFPREFIX_IN6: 330 case SIOCCIFPREFIX_IN6: 331 case SIOCSGIFPREFIX_IN6: 332 case SIOCGIFPREFIX_IN6: 333 log(LOG_NOTICE, 334 "prefix ioctls are now invalidated. " 335 "please use ifconfig.\n"); 336 return (EOPNOTSUPP); 337 } 338 339 switch (cmd) { 340 case SIOCSSCOPE6: 341 if (td != NULL) { 342 error = priv_check(td, PRIV_NETINET_SCOPE6); 343 if (error) 344 return (error); 345 } 346 /* FALLTHROUGH */ 347 case SIOCGSCOPE6: 348 case SIOCGSCOPE6DEF: 349 return (scope6_ioctl(cmd, data, ifp)); 350 } 351 352 /* 353 * Find address for this interface, if it exists. 354 * 355 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 356 * only, and used the first interface address as the target of other 357 * operations (without checking ifra_addr). This was because netinet 358 * code/API assumed at most 1 interface address per interface. 359 * Since IPv6 allows a node to assign multiple addresses 360 * on a single interface, we almost always look and check the 361 * presence of ifra_addr, and reject invalid ones here. 362 * It also decreases duplicated code among SIOC*_IN6 operations. 363 */ 364 switch (cmd) { 365 case SIOCAIFADDR_IN6: 366 case SIOCSIFPHYADDR_IN6: 367 sa6 = &ifra->ifra_addr; 368 break; 369 case SIOCSIFADDR_IN6: 370 case SIOCGIFADDR_IN6: 371 case SIOCSIFDSTADDR_IN6: 372 case SIOCSIFNETMASK_IN6: 373 case SIOCGIFDSTADDR_IN6: 374 case SIOCGIFNETMASK_IN6: 375 case SIOCDIFADDR_IN6: 376 case SIOCGIFPSRCADDR_IN6: 377 case SIOCGIFPDSTADDR_IN6: 378 case SIOCGIFAFLAG_IN6: 379 case SIOCSNDFLUSH_IN6: 380 case SIOCSPFXFLUSH_IN6: 381 case SIOCSRTRFLUSH_IN6: 382 case SIOCGIFALIFETIME_IN6: 383 case SIOCGIFSTAT_IN6: 384 case SIOCGIFSTAT_ICMP6: 385 sa6 = &ifr->ifr_addr; 386 break; 387 case SIOCSIFADDR: 388 case SIOCSIFBRDADDR: 389 case SIOCSIFDSTADDR: 390 case SIOCSIFNETMASK: 391 /* 392 * Although we should pass any non-INET6 ioctl requests 393 * down to driver, we filter some legacy INET requests. 394 * Drivers trust SIOCSIFADDR et al to come from an already 395 * privileged layer, and do not perform any credentials 396 * checks or input validation. 397 */ 398 return (EINVAL); 399 default: 400 sa6 = NULL; 401 break; 402 } 403 if (sa6 && sa6->sin6_family == AF_INET6) { 404 if (sa6->sin6_scope_id != 0) 405 error = sa6_embedscope(sa6, 0); 406 else 407 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 408 if (error != 0) 409 return (error); 410 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 411 &sa6->sin6_addr)) != 0) 412 return (error); 413 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 414 } else 415 ia = NULL; 416 417 switch (cmd) { 418 case SIOCSIFADDR_IN6: 419 case SIOCSIFDSTADDR_IN6: 420 case SIOCSIFNETMASK_IN6: 421 /* 422 * Since IPv6 allows a node to assign multiple addresses 423 * on a single interface, SIOCSIFxxx ioctls are deprecated. 424 */ 425 /* we decided to obsolete this command (20000704) */ 426 error = EINVAL; 427 goto out; 428 429 case SIOCDIFADDR_IN6: 430 /* 431 * for IPv4, we look for existing in_ifaddr here to allow 432 * "ifconfig if0 delete" to remove the first IPv4 address on 433 * the interface. For IPv6, as the spec allows multiple 434 * interface address from the day one, we consider "remove the 435 * first one" semantics to be not preferable. 436 */ 437 if (ia == NULL) { 438 error = EADDRNOTAVAIL; 439 goto out; 440 } 441 /* FALLTHROUGH */ 442 case SIOCAIFADDR_IN6: 443 /* 444 * We always require users to specify a valid IPv6 address for 445 * the corresponding operation. 446 */ 447 if (ifra->ifra_addr.sin6_family != AF_INET6 || 448 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 449 error = EAFNOSUPPORT; 450 goto out; 451 } 452 453 if (td != NULL) { 454 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 455 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 456 if (error) 457 goto out; 458 } 459 /* FALLTHROUGH */ 460 case SIOCGIFSTAT_IN6: 461 case SIOCGIFSTAT_ICMP6: 462 if (ifp->if_afdata[AF_INET6] == NULL) { 463 error = EPFNOSUPPORT; 464 goto out; 465 } 466 break; 467 468 case SIOCGIFADDR_IN6: 469 /* This interface is basically deprecated. use SIOCGIFCONF. */ 470 /* FALLTHROUGH */ 471 case SIOCGIFAFLAG_IN6: 472 case SIOCGIFNETMASK_IN6: 473 case SIOCGIFDSTADDR_IN6: 474 case SIOCGIFALIFETIME_IN6: 475 /* must think again about its semantics */ 476 if (ia == NULL) { 477 error = EADDRNOTAVAIL; 478 goto out; 479 } 480 break; 481 } 482 483 switch (cmd) { 484 case SIOCGIFADDR_IN6: 485 ifr->ifr_addr = ia->ia_addr; 486 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 487 goto out; 488 break; 489 490 case SIOCGIFDSTADDR_IN6: 491 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 492 error = EINVAL; 493 goto out; 494 } 495 ifr->ifr_dstaddr = ia->ia_dstaddr; 496 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 497 goto out; 498 break; 499 500 case SIOCGIFNETMASK_IN6: 501 ifr->ifr_addr = ia->ia_prefixmask; 502 break; 503 504 case SIOCGIFAFLAG_IN6: 505 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 506 break; 507 508 case SIOCGIFSTAT_IN6: 509 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 510 ifp->if_afdata[AF_INET6])->in6_ifstat, 511 &ifr->ifr_ifru.ifru_stat, 512 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 513 break; 514 515 case SIOCGIFSTAT_ICMP6: 516 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 517 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 518 &ifr->ifr_ifru.ifru_icmp6stat, 519 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 520 break; 521 522 case SIOCGIFALIFETIME_IN6: 523 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 524 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 525 time_t maxexpire; 526 struct in6_addrlifetime *retlt = 527 &ifr->ifr_ifru.ifru_lifetime; 528 529 /* 530 * XXX: adjust expiration time assuming time_t is 531 * signed. 532 */ 533 maxexpire = (-1) & 534 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 535 if (ia->ia6_lifetime.ia6t_vltime < 536 maxexpire - ia->ia6_updatetime) { 537 retlt->ia6t_expire = ia->ia6_updatetime + 538 ia->ia6_lifetime.ia6t_vltime; 539 } else 540 retlt->ia6t_expire = maxexpire; 541 } 542 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 543 time_t maxexpire; 544 struct in6_addrlifetime *retlt = 545 &ifr->ifr_ifru.ifru_lifetime; 546 547 /* 548 * XXX: adjust expiration time assuming time_t is 549 * signed. 550 */ 551 maxexpire = (-1) & 552 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 553 if (ia->ia6_lifetime.ia6t_pltime < 554 maxexpire - ia->ia6_updatetime) { 555 retlt->ia6t_preferred = ia->ia6_updatetime + 556 ia->ia6_lifetime.ia6t_pltime; 557 } else 558 retlt->ia6t_preferred = maxexpire; 559 } 560 break; 561 562 case SIOCAIFADDR_IN6: 563 { 564 struct nd_prefixctl pr0; 565 struct nd_prefix *pr; 566 567 /* 568 * first, make or update the interface address structure, 569 * and link it to the list. 570 */ 571 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 572 goto out; 573 if (ia != NULL) { 574 if (ia->ia_ifa.ifa_carp) 575 (*carp_detach_p)(&ia->ia_ifa, true); 576 ifa_free(&ia->ia_ifa); 577 } 578 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 579 == NULL) { 580 /* 581 * this can happen when the user specify the 0 valid 582 * lifetime. 583 */ 584 break; 585 } 586 587 if (cmd == ocmd && ifra->ifra_vhid > 0) { 588 if (carp_attach_p != NULL) 589 error = (*carp_attach_p)(&ia->ia_ifa, 590 ifra->ifra_vhid); 591 else 592 error = EPROTONOSUPPORT; 593 if (error) 594 goto out; 595 else 596 carp_attached = 1; 597 } 598 599 /* 600 * then, make the prefix on-link on the interface. 601 * XXX: we'd rather create the prefix before the address, but 602 * we need at least one address to install the corresponding 603 * interface route, so we configure the address first. 604 */ 605 606 /* 607 * convert mask to prefix length (prefixmask has already 608 * been validated in in6_update_ifa(). 609 */ 610 bzero(&pr0, sizeof(pr0)); 611 pr0.ndpr_ifp = ifp; 612 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 613 NULL); 614 if (pr0.ndpr_plen == 128) { 615 /* we don't need to install a host route. */ 616 goto aifaddr_out; 617 } 618 pr0.ndpr_prefix = ifra->ifra_addr; 619 /* apply the mask for safety. */ 620 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 621 &ifra->ifra_prefixmask.sin6_addr); 622 623 /* 624 * XXX: since we don't have an API to set prefix (not address) 625 * lifetimes, we just use the same lifetimes as addresses. 626 * The (temporarily) installed lifetimes can be overridden by 627 * later advertised RAs (when accept_rtadv is non 0), which is 628 * an intended behavior. 629 */ 630 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 631 pr0.ndpr_raf_auto = 632 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 633 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 634 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 635 636 /* add the prefix if not yet. */ 637 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 638 /* 639 * nd6_prelist_add will install the corresponding 640 * interface route. 641 */ 642 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 643 if (carp_attached) 644 (*carp_detach_p)(&ia->ia_ifa, false); 645 goto out; 646 } 647 } 648 649 /* relate the address to the prefix */ 650 if (ia->ia6_ndpr == NULL) { 651 ia->ia6_ndpr = pr; 652 pr->ndpr_addrcnt++; 653 654 /* 655 * If this is the first autoconf address from the 656 * prefix, create a temporary address as well 657 * (when required). 658 */ 659 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 660 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 661 int e; 662 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 663 log(LOG_NOTICE, "in6_control: failed " 664 "to create a temporary address, " 665 "errno=%d\n", e); 666 } 667 } 668 } 669 nd6_prefix_rele(pr); 670 671 /* 672 * this might affect the status of autoconfigured addresses, 673 * that is, this address might make other addresses detached. 674 */ 675 pfxlist_onlink_check(); 676 677 aifaddr_out: 678 /* 679 * Try to clear the flag when a new IPv6 address is added 680 * onto an IFDISABLED interface and it succeeds. 681 */ 682 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 683 struct in6_ndireq nd; 684 685 memset(&nd, 0, sizeof(nd)); 686 nd.ndi.flags = ND_IFINFO(ifp)->flags; 687 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 688 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 689 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 690 "SIOCSIFINFO_FLAGS for -ifdisabled " 691 "failed."); 692 /* 693 * Ignore failure of clearing the flag intentionally. 694 * The failure means address duplication was detected. 695 */ 696 } 697 break; 698 } 699 700 case SIOCDIFADDR_IN6: 701 { 702 struct nd_prefix *pr; 703 704 /* 705 * If the address being deleted is the only one that owns 706 * the corresponding prefix, expire the prefix as well. 707 * XXX: theoretically, we don't have to worry about such 708 * relationship, since we separate the address management 709 * and the prefix management. We do this, however, to provide 710 * as much backward compatibility as possible in terms of 711 * the ioctl operation. 712 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 713 */ 714 pr = ia->ia6_ndpr; 715 in6_purgeaddr(&ia->ia_ifa); 716 if (pr != NULL && pr->ndpr_addrcnt == 0) { 717 ND6_WLOCK(); 718 nd6_prefix_unlink(pr, NULL); 719 ND6_WUNLOCK(); 720 nd6_prefix_del(pr); 721 } 722 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 723 IFADDR_EVENT_DEL); 724 break; 725 } 726 727 default: 728 if (ifp->if_ioctl == NULL) { 729 error = EOPNOTSUPP; 730 goto out; 731 } 732 error = (*ifp->if_ioctl)(ifp, cmd, data); 733 goto out; 734 } 735 736 error = 0; 737 out: 738 if (ia != NULL) 739 ifa_free(&ia->ia_ifa); 740 return (error); 741 } 742 743 744 static struct in6_multi_mship * 745 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr, 746 int *errorp, int delay) 747 { 748 struct in6_multi_mship *imm; 749 int error; 750 751 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT); 752 if (imm == NULL) { 753 *errorp = ENOBUFS; 754 return (NULL); 755 } 756 757 delay = (delay * PR_FASTHZ) / hz; 758 759 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay); 760 if (error) { 761 *errorp = error; 762 free(imm, M_IP6MADDR); 763 return (NULL); 764 } 765 766 return (imm); 767 } 768 /* 769 * Join necessary multicast groups. Factored out from in6_update_ifa(). 770 * This entire work should only be done once, for the default FIB. 771 */ 772 static int 773 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 774 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 775 { 776 char ip6buf[INET6_ADDRSTRLEN]; 777 struct in6_addr mltaddr; 778 struct in6_multi_mship *imm; 779 int delay, error; 780 781 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 782 783 /* Join solicited multicast addr for new host id. */ 784 bzero(&mltaddr, sizeof(struct in6_addr)); 785 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 786 mltaddr.s6_addr32[2] = htonl(1); 787 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 788 mltaddr.s6_addr8[12] = 0xff; 789 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 790 /* XXX: should not happen */ 791 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 792 goto cleanup; 793 } 794 delay = error = 0; 795 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 796 /* 797 * We need a random delay for DAD on the address being 798 * configured. It also means delaying transmission of the 799 * corresponding MLD report to avoid report collision. 800 * [RFC 4861, Section 6.3.7] 801 */ 802 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 803 } 804 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 805 if (imm == NULL) { 806 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 807 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 808 if_name(ifp), error)); 809 goto cleanup; 810 } 811 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 812 *in6m_sol = imm->i6mm_maddr; 813 814 /* 815 * Join link-local all-nodes address. 816 */ 817 mltaddr = in6addr_linklocal_allnodes; 818 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 819 goto cleanup; /* XXX: should not fail */ 820 821 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 822 if (imm == NULL) { 823 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 824 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 825 if_name(ifp), error)); 826 goto cleanup; 827 } 828 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 829 830 /* 831 * Join node information group address. 832 */ 833 delay = 0; 834 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 835 /* 836 * The spec does not say anything about delay for this group, 837 * but the same logic should apply. 838 */ 839 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 840 } 841 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 842 /* XXX jinmei */ 843 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 844 if (imm == NULL) 845 nd6log((LOG_WARNING, 846 "%s: in6_joingroup failed for %s on %s " 847 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 848 &mltaddr), if_name(ifp), error)); 849 /* XXX not very fatal, go on... */ 850 else 851 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 852 } 853 if (V_icmp6_nodeinfo_oldmcprefix && 854 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 855 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 856 if (imm == NULL) 857 nd6log((LOG_WARNING, 858 "%s: in6_joingroup failed for %s on %s " 859 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 860 &mltaddr), if_name(ifp), error)); 861 /* XXX not very fatal, go on... */ 862 else 863 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 864 } 865 866 /* 867 * Join interface-local all-nodes address. 868 * (ff01::1%ifN, and ff01::%ifN/32) 869 */ 870 mltaddr = in6addr_nodelocal_allnodes; 871 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 872 goto cleanup; /* XXX: should not fail */ 873 874 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 875 if (imm == NULL) { 876 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 877 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 878 &mltaddr), if_name(ifp), error)); 879 goto cleanup; 880 } 881 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 882 883 cleanup: 884 return (error); 885 } 886 887 /* 888 * Update parameters of an IPv6 interface address. 889 * If necessary, a new entry is created and linked into address chains. 890 * This function is separated from in6_control(). 891 */ 892 int 893 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 894 struct in6_ifaddr *ia, int flags) 895 { 896 int error, hostIsNew = 0; 897 898 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 899 return (error); 900 901 if (ia == NULL) { 902 hostIsNew = 1; 903 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 904 return (ENOBUFS); 905 } 906 907 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 908 if (error != 0) { 909 if (hostIsNew != 0) { 910 in6_unlink_ifa(ia, ifp); 911 ifa_free(&ia->ia_ifa); 912 } 913 return (error); 914 } 915 916 if (hostIsNew) 917 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 918 919 return (error); 920 } 921 922 /* 923 * Fill in basic IPv6 address request info. 924 */ 925 void 926 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 927 const struct in6_addr *mask) 928 { 929 930 memset(ifra, 0, sizeof(struct in6_aliasreq)); 931 932 ifra->ifra_addr.sin6_family = AF_INET6; 933 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 934 if (addr != NULL) 935 ifra->ifra_addr.sin6_addr = *addr; 936 937 ifra->ifra_prefixmask.sin6_family = AF_INET6; 938 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 939 if (mask != NULL) 940 ifra->ifra_prefixmask.sin6_addr = *mask; 941 } 942 943 static int 944 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 945 struct in6_ifaddr *ia, int flags) 946 { 947 int plen = -1; 948 struct sockaddr_in6 dst6; 949 struct in6_addrlifetime *lt; 950 char ip6buf[INET6_ADDRSTRLEN]; 951 952 /* Validate parameters */ 953 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 954 return (EINVAL); 955 956 /* 957 * The destination address for a p2p link must have a family 958 * of AF_UNSPEC or AF_INET6. 959 */ 960 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 961 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 962 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 963 return (EAFNOSUPPORT); 964 965 /* 966 * Validate address 967 */ 968 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 969 ifra->ifra_addr.sin6_family != AF_INET6) 970 return (EINVAL); 971 972 /* 973 * validate ifra_prefixmask. don't check sin6_family, netmask 974 * does not carry fields other than sin6_len. 975 */ 976 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 977 return (EINVAL); 978 /* 979 * Because the IPv6 address architecture is classless, we require 980 * users to specify a (non 0) prefix length (mask) for a new address. 981 * We also require the prefix (when specified) mask is valid, and thus 982 * reject a non-consecutive mask. 983 */ 984 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 985 return (EINVAL); 986 if (ifra->ifra_prefixmask.sin6_len != 0) { 987 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 988 (u_char *)&ifra->ifra_prefixmask + 989 ifra->ifra_prefixmask.sin6_len); 990 if (plen <= 0) 991 return (EINVAL); 992 } else { 993 /* 994 * In this case, ia must not be NULL. We just use its prefix 995 * length. 996 */ 997 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 998 } 999 /* 1000 * If the destination address on a p2p interface is specified, 1001 * and the address is a scoped one, validate/set the scope 1002 * zone identifier. 1003 */ 1004 dst6 = ifra->ifra_dstaddr; 1005 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1006 (dst6.sin6_family == AF_INET6)) { 1007 struct in6_addr in6_tmp; 1008 u_int32_t zoneid; 1009 1010 in6_tmp = dst6.sin6_addr; 1011 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1012 return (EINVAL); /* XXX: should be impossible */ 1013 1014 if (dst6.sin6_scope_id != 0) { 1015 if (dst6.sin6_scope_id != zoneid) 1016 return (EINVAL); 1017 } else /* user omit to specify the ID. */ 1018 dst6.sin6_scope_id = zoneid; 1019 1020 /* convert into the internal form */ 1021 if (sa6_embedscope(&dst6, 0)) 1022 return (EINVAL); /* XXX: should be impossible */ 1023 } 1024 /* Modify original ifra_dstaddr to reflect changes */ 1025 ifra->ifra_dstaddr = dst6; 1026 1027 /* 1028 * The destination address can be specified only for a p2p or a 1029 * loopback interface. If specified, the corresponding prefix length 1030 * must be 128. 1031 */ 1032 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1033 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1034 /* XXX: noisy message */ 1035 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1036 "be specified for a p2p or a loopback IF only\n")); 1037 return (EINVAL); 1038 } 1039 if (plen != 128) { 1040 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1041 "be 128 when dstaddr is specified\n")); 1042 return (EINVAL); 1043 } 1044 } 1045 /* lifetime consistency check */ 1046 lt = &ifra->ifra_lifetime; 1047 if (lt->ia6t_pltime > lt->ia6t_vltime) 1048 return (EINVAL); 1049 if (lt->ia6t_vltime == 0) { 1050 /* 1051 * the following log might be noisy, but this is a typical 1052 * configuration mistake or a tool's bug. 1053 */ 1054 nd6log((LOG_INFO, 1055 "in6_update_ifa: valid lifetime is 0 for %s\n", 1056 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1057 1058 if (ia == NULL) 1059 return (0); /* there's nothing to do */ 1060 } 1061 1062 /* Check prefix mask */ 1063 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1064 /* 1065 * We prohibit changing the prefix length of an existing 1066 * address, because 1067 * + such an operation should be rare in IPv6, and 1068 * + the operation would confuse prefix management. 1069 */ 1070 if (ia->ia_prefixmask.sin6_len != 0 && 1071 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1072 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1073 "of an existing %s address should not be changed\n", 1074 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1075 1076 return (EINVAL); 1077 } 1078 } 1079 1080 return (0); 1081 } 1082 1083 1084 /* 1085 * Allocate a new ifaddr and link it into chains. 1086 */ 1087 static struct in6_ifaddr * 1088 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1089 { 1090 struct in6_ifaddr *ia; 1091 1092 /* 1093 * When in6_alloc_ifa() is called in a process of a received 1094 * RA, it is called under an interrupt context. So, we should 1095 * call malloc with M_NOWAIT. 1096 */ 1097 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1098 if (ia == NULL) 1099 return (NULL); 1100 LIST_INIT(&ia->ia6_memberships); 1101 /* Initialize the address and masks, and put time stamp */ 1102 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1103 ia->ia_addr.sin6_family = AF_INET6; 1104 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1105 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1106 ia->ia_addr = ifra->ifra_addr; 1107 ia->ia6_createtime = time_uptime; 1108 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1109 /* 1110 * Some functions expect that ifa_dstaddr is not 1111 * NULL for p2p interfaces. 1112 */ 1113 ia->ia_ifa.ifa_dstaddr = 1114 (struct sockaddr *)&ia->ia_dstaddr; 1115 } else { 1116 ia->ia_ifa.ifa_dstaddr = NULL; 1117 } 1118 1119 /* set prefix mask if any */ 1120 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1121 if (ifra->ifra_prefixmask.sin6_len != 0) { 1122 ia->ia_prefixmask.sin6_family = AF_INET6; 1123 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1124 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1125 } 1126 1127 ia->ia_ifp = ifp; 1128 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1129 IF_ADDR_WLOCK(ifp); 1130 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1131 IF_ADDR_WUNLOCK(ifp); 1132 1133 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1134 IN6_IFADDR_WLOCK(); 1135 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1136 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1137 IN6_IFADDR_WUNLOCK(); 1138 1139 return (ia); 1140 } 1141 1142 /* 1143 * Update/configure interface address parameters: 1144 * 1145 * 1) Update lifetime 1146 * 2) Update interface metric ad flags 1147 * 3) Notify other subsystems 1148 */ 1149 static int 1150 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1151 struct in6_ifaddr *ia, int hostIsNew, int flags) 1152 { 1153 int error; 1154 1155 /* update timestamp */ 1156 ia->ia6_updatetime = time_uptime; 1157 1158 /* 1159 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1160 * to see if the address is deprecated or invalidated, but initialize 1161 * these members for applications. 1162 */ 1163 ia->ia6_lifetime = ifra->ifra_lifetime; 1164 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1165 ia->ia6_lifetime.ia6t_expire = 1166 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1167 } else 1168 ia->ia6_lifetime.ia6t_expire = 0; 1169 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1170 ia->ia6_lifetime.ia6t_preferred = 1171 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1172 } else 1173 ia->ia6_lifetime.ia6t_preferred = 0; 1174 1175 /* 1176 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1177 * userland, make it deprecated. 1178 */ 1179 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1180 ia->ia6_lifetime.ia6t_pltime = 0; 1181 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1182 } 1183 1184 /* 1185 * configure address flags. 1186 */ 1187 ia->ia6_flags = ifra->ifra_flags; 1188 1189 /* 1190 * Make the address tentative before joining multicast addresses, 1191 * so that corresponding MLD responses would not have a tentative 1192 * source address. 1193 */ 1194 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1195 1196 /* 1197 * DAD should be performed for an new address or addresses on 1198 * an interface with ND6_IFF_IFDISABLED. 1199 */ 1200 if (in6if_do_dad(ifp) && 1201 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1202 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1203 1204 /* notify other subsystems */ 1205 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1206 1207 return (error); 1208 } 1209 1210 /* 1211 * Do link-level ifa job: 1212 * 1) Add lle entry for added address 1213 * 2) Notifies routing socket users about new address 1214 * 3) join appropriate multicast group 1215 * 4) start DAD if enabled 1216 */ 1217 static int 1218 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1219 struct in6_ifaddr *ia, int flags) 1220 { 1221 struct in6_multi *in6m_sol; 1222 int error = 0; 1223 1224 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1225 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1226 in6_purgeaddr(&ia->ia_ifa); 1227 ifa_free(&ia->ia_ifa); 1228 return (error); 1229 } 1230 1231 /* Join necessary multicast groups. */ 1232 in6m_sol = NULL; 1233 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1234 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1235 if (error != 0) { 1236 in6_purgeaddr(&ia->ia_ifa); 1237 ifa_free(&ia->ia_ifa); 1238 return (error); 1239 } 1240 } 1241 1242 /* Perform DAD, if the address is TENTATIVE. */ 1243 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1244 int delay, mindelay, maxdelay; 1245 1246 delay = 0; 1247 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1248 /* 1249 * We need to impose a delay before sending an NS 1250 * for DAD. Check if we also needed a delay for the 1251 * corresponding MLD message. If we did, the delay 1252 * should be larger than the MLD delay (this could be 1253 * relaxed a bit, but this simple logic is at least 1254 * safe). 1255 * XXX: Break data hiding guidelines and look at 1256 * state for the solicited multicast group. 1257 */ 1258 mindelay = 0; 1259 if (in6m_sol != NULL && 1260 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1261 mindelay = in6m_sol->in6m_timer; 1262 } 1263 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1264 if (maxdelay - mindelay == 0) 1265 delay = 0; 1266 else { 1267 delay = 1268 (arc4random() % (maxdelay - mindelay)) + 1269 mindelay; 1270 } 1271 } 1272 nd6_dad_start((struct ifaddr *)ia, delay); 1273 } 1274 1275 in6_newaddrmsg(ia, RTM_ADD); 1276 ifa_free(&ia->ia_ifa); 1277 return (error); 1278 } 1279 1280 void 1281 in6_purgeaddr(struct ifaddr *ifa) 1282 { 1283 struct ifnet *ifp = ifa->ifa_ifp; 1284 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1285 struct in6_multi_mship *imm; 1286 int plen, error; 1287 1288 if (ifa->ifa_carp) 1289 (*carp_detach_p)(ifa, false); 1290 1291 /* 1292 * Remove the loopback route to the interface address. 1293 * The check for the current setting of "nd6_useloopback" 1294 * is not needed. 1295 */ 1296 if (ia->ia_flags & IFA_RTSELF) { 1297 error = ifa_del_loopback_route((struct ifaddr *)ia, 1298 (struct sockaddr *)&ia->ia_addr); 1299 if (error == 0) 1300 ia->ia_flags &= ~IFA_RTSELF; 1301 } 1302 1303 /* stop DAD processing */ 1304 nd6_dad_stop(ifa); 1305 1306 /* Leave multicast groups. */ 1307 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1308 LIST_REMOVE(imm, i6mm_chain); 1309 if (imm->i6mm_maddr != NULL) 1310 in6_leavegroup(imm->i6mm_maddr, NULL); 1311 free(imm, M_IP6MADDR); 1312 } 1313 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1314 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1315 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1316 (ia->ia_dstaddr.sin6_family == AF_INET6 ? RTF_HOST : 0)); 1317 if (error != 0) 1318 log(LOG_INFO, "%s: err=%d, destination address delete " 1319 "failed\n", __func__, error); 1320 ia->ia_flags &= ~IFA_ROUTE; 1321 } 1322 1323 in6_newaddrmsg(ia, RTM_DELETE); 1324 in6_unlink_ifa(ia, ifp); 1325 } 1326 1327 static void 1328 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1329 { 1330 char ip6buf[INET6_ADDRSTRLEN]; 1331 int remove_lle; 1332 1333 IF_ADDR_WLOCK(ifp); 1334 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 1335 IF_ADDR_WUNLOCK(ifp); 1336 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1337 1338 /* 1339 * Defer the release of what might be the last reference to the 1340 * in6_ifaddr so that it can't be freed before the remainder of the 1341 * cleanup. 1342 */ 1343 IN6_IFADDR_WLOCK(); 1344 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link); 1345 CK_LIST_REMOVE(ia, ia6_hash); 1346 IN6_IFADDR_WUNLOCK(); 1347 1348 /* 1349 * Release the reference to the base prefix. There should be a 1350 * positive reference. 1351 */ 1352 remove_lle = 0; 1353 if (ia->ia6_ndpr == NULL) { 1354 nd6log((LOG_NOTICE, 1355 "in6_unlink_ifa: autoconf'ed address " 1356 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1357 } else { 1358 ia->ia6_ndpr->ndpr_addrcnt--; 1359 /* Do not delete lles within prefix if refcont != 0 */ 1360 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1361 remove_lle = 1; 1362 ia->ia6_ndpr = NULL; 1363 } 1364 1365 nd6_rem_ifa_lle(ia, remove_lle); 1366 1367 /* 1368 * Also, if the address being removed is autoconf'ed, call 1369 * pfxlist_onlink_check() since the release might affect the status of 1370 * other (detached) addresses. 1371 */ 1372 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1373 pfxlist_onlink_check(); 1374 } 1375 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1376 } 1377 1378 /* 1379 * Notifies other subsystems about address change/arrival: 1380 * 1) Notifies device handler on the first IPv6 address assignment 1381 * 2) Handle routing table changes for P2P links and route 1382 * 3) Handle routing table changes for address host route 1383 */ 1384 static int 1385 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1386 struct in6_aliasreq *ifra, int hostIsNew) 1387 { 1388 int error = 0, plen, ifacount = 0; 1389 struct ifaddr *ifa; 1390 struct sockaddr_in6 *pdst; 1391 char ip6buf[INET6_ADDRSTRLEN]; 1392 1393 /* 1394 * Give the interface a chance to initialize 1395 * if this is its first address, 1396 */ 1397 if (hostIsNew != 0) { 1398 struct epoch_tracker et; 1399 1400 NET_EPOCH_ENTER(et); 1401 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1402 if (ifa->ifa_addr->sa_family != AF_INET6) 1403 continue; 1404 ifacount++; 1405 } 1406 NET_EPOCH_EXIT(et); 1407 } 1408 1409 if (ifacount <= 1 && ifp->if_ioctl) { 1410 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1411 if (error) 1412 goto done; 1413 } 1414 1415 /* 1416 * If a new destination address is specified, scrub the old one and 1417 * install the new destination. Note that the interface must be 1418 * p2p or loopback. 1419 */ 1420 pdst = &ifra->ifra_dstaddr; 1421 if (pdst->sin6_family == AF_INET6 && 1422 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1423 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1424 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1425 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1426 "remove a route to the old destination: %s\n", 1427 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1428 /* proceed anyway... */ 1429 } else 1430 ia->ia_flags &= ~IFA_ROUTE; 1431 ia->ia_dstaddr = *pdst; 1432 } 1433 1434 /* 1435 * If a new destination address is specified for a point-to-point 1436 * interface, install a route to the destination as an interface 1437 * direct route. 1438 * XXX: the logic below rejects assigning multiple addresses on a p2p 1439 * interface that share the same destination. 1440 */ 1441 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1442 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1443 ia->ia_dstaddr.sin6_family == AF_INET6) { 1444 int rtflags = RTF_UP | RTF_HOST; 1445 /* 1446 * Handle the case for ::1 . 1447 */ 1448 if (ifp->if_flags & IFF_LOOPBACK) 1449 ia->ia_flags |= IFA_RTSELF; 1450 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1451 if (error) 1452 goto done; 1453 ia->ia_flags |= IFA_ROUTE; 1454 } 1455 1456 /* 1457 * add a loopback route to self if not exists 1458 */ 1459 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1460 error = ifa_add_loopback_route((struct ifaddr *)ia, 1461 (struct sockaddr *)&ia->ia_addr); 1462 if (error == 0) 1463 ia->ia_flags |= IFA_RTSELF; 1464 } 1465 done: 1466 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1467 "Invoking IPv6 network device address event may sleep"); 1468 1469 ifa_ref(&ia->ia_ifa); 1470 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 1471 IFADDR_EVENT_ADD); 1472 ifa_free(&ia->ia_ifa); 1473 1474 return (error); 1475 } 1476 1477 /* 1478 * Find an IPv6 interface link-local address specific to an interface. 1479 * ifaddr is returned referenced. 1480 */ 1481 struct in6_ifaddr * 1482 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1483 { 1484 struct ifaddr *ifa; 1485 1486 NET_EPOCH_ASSERT(); 1487 1488 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1489 if (ifa->ifa_addr->sa_family != AF_INET6) 1490 continue; 1491 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1492 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1493 ignoreflags) != 0) 1494 continue; 1495 ifa_ref(ifa); 1496 break; 1497 } 1498 } 1499 1500 return ((struct in6_ifaddr *)ifa); 1501 } 1502 1503 1504 /* 1505 * find the interface address corresponding to a given IPv6 address. 1506 * ifaddr is returned referenced. 1507 */ 1508 struct in6_ifaddr * 1509 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1510 { 1511 struct rm_priotracker in6_ifa_tracker; 1512 struct in6_ifaddr *ia; 1513 1514 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1515 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1516 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1517 if (zoneid != 0 && 1518 zoneid != ia->ia_addr.sin6_scope_id) 1519 continue; 1520 ifa_ref(&ia->ia_ifa); 1521 break; 1522 } 1523 } 1524 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1525 return (ia); 1526 } 1527 1528 /* 1529 * find the internet address corresponding to a given interface and address. 1530 * ifaddr is returned referenced. 1531 */ 1532 struct in6_ifaddr * 1533 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1534 { 1535 struct epoch_tracker et; 1536 struct ifaddr *ifa; 1537 1538 NET_EPOCH_ENTER(et); 1539 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1540 if (ifa->ifa_addr->sa_family != AF_INET6) 1541 continue; 1542 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1543 ifa_ref(ifa); 1544 break; 1545 } 1546 } 1547 NET_EPOCH_EXIT(et); 1548 1549 return ((struct in6_ifaddr *)ifa); 1550 } 1551 1552 /* 1553 * Find a link-local scoped address on ifp and return it if any. 1554 */ 1555 struct in6_ifaddr * 1556 in6ifa_llaonifp(struct ifnet *ifp) 1557 { 1558 struct epoch_tracker et; 1559 struct sockaddr_in6 *sin6; 1560 struct ifaddr *ifa; 1561 1562 1563 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1564 return (NULL); 1565 NET_EPOCH_ENTER(et); 1566 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1567 if (ifa->ifa_addr->sa_family != AF_INET6) 1568 continue; 1569 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1570 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1571 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1572 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1573 break; 1574 } 1575 NET_EPOCH_EXIT(et); 1576 1577 return ((struct in6_ifaddr *)ifa); 1578 } 1579 1580 /* 1581 * Convert IP6 address to printable (loggable) representation. Caller 1582 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1583 */ 1584 static char digits[] = "0123456789abcdef"; 1585 char * 1586 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1587 { 1588 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1589 char *cp; 1590 const u_int16_t *a = (const u_int16_t *)addr; 1591 const u_int8_t *d; 1592 int dcolon = 0, zero = 0; 1593 1594 cp = ip6buf; 1595 1596 for (i = 0; i < 8; i++) { 1597 if (*(a + i) == 0) { 1598 cnt++; 1599 if (cnt == 1) 1600 idx = i; 1601 } 1602 else if (maxcnt < cnt) { 1603 maxcnt = cnt; 1604 index = idx; 1605 cnt = 0; 1606 } 1607 } 1608 if (maxcnt < cnt) { 1609 maxcnt = cnt; 1610 index = idx; 1611 } 1612 1613 for (i = 0; i < 8; i++) { 1614 if (dcolon == 1) { 1615 if (*a == 0) { 1616 if (i == 7) 1617 *cp++ = ':'; 1618 a++; 1619 continue; 1620 } else 1621 dcolon = 2; 1622 } 1623 if (*a == 0) { 1624 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1625 if (i == 0) 1626 *cp++ = ':'; 1627 *cp++ = ':'; 1628 dcolon = 1; 1629 } else { 1630 *cp++ = '0'; 1631 *cp++ = ':'; 1632 } 1633 a++; 1634 continue; 1635 } 1636 d = (const u_char *)a; 1637 /* Try to eliminate leading zeros in printout like in :0001. */ 1638 zero = 1; 1639 *cp = digits[*d >> 4]; 1640 if (*cp != '0') { 1641 zero = 0; 1642 cp++; 1643 } 1644 *cp = digits[*d++ & 0xf]; 1645 if (zero == 0 || (*cp != '0')) { 1646 zero = 0; 1647 cp++; 1648 } 1649 *cp = digits[*d >> 4]; 1650 if (zero == 0 || (*cp != '0')) { 1651 zero = 0; 1652 cp++; 1653 } 1654 *cp++ = digits[*d & 0xf]; 1655 *cp++ = ':'; 1656 a++; 1657 } 1658 *--cp = '\0'; 1659 return (ip6buf); 1660 } 1661 1662 int 1663 in6_localaddr(struct in6_addr *in6) 1664 { 1665 struct rm_priotracker in6_ifa_tracker; 1666 struct in6_ifaddr *ia; 1667 1668 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1669 return 1; 1670 1671 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1672 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1673 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1674 &ia->ia_prefixmask.sin6_addr)) { 1675 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1676 return 1; 1677 } 1678 } 1679 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1680 1681 return (0); 1682 } 1683 1684 /* 1685 * Return 1 if an internet address is for the local host and configured 1686 * on one of its interfaces. 1687 */ 1688 int 1689 in6_localip(struct in6_addr *in6) 1690 { 1691 struct rm_priotracker in6_ifa_tracker; 1692 struct in6_ifaddr *ia; 1693 1694 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1695 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1696 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1697 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1698 return (1); 1699 } 1700 } 1701 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1702 return (0); 1703 } 1704 1705 /* 1706 * Return 1 if an internet address is configured on an interface. 1707 */ 1708 int 1709 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1710 { 1711 struct in6_addr in6; 1712 struct ifaddr *ifa; 1713 struct in6_ifaddr *ia6; 1714 1715 NET_EPOCH_ASSERT(); 1716 1717 in6 = *addr; 1718 if (in6_clearscope(&in6)) 1719 return (0); 1720 in6_setscope(&in6, ifp, NULL); 1721 1722 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1723 if (ifa->ifa_addr->sa_family != AF_INET6) 1724 continue; 1725 ia6 = (struct in6_ifaddr *)ifa; 1726 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) 1727 return (1); 1728 } 1729 1730 return (0); 1731 } 1732 1733 int 1734 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1735 { 1736 struct rm_priotracker in6_ifa_tracker; 1737 struct in6_ifaddr *ia; 1738 1739 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1740 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1741 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1742 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1743 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1744 return (1); /* true */ 1745 } 1746 break; 1747 } 1748 } 1749 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1750 1751 return (0); /* false */ 1752 } 1753 1754 /* 1755 * return length of part which dst and src are equal 1756 * hard coding... 1757 */ 1758 int 1759 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1760 { 1761 int match = 0; 1762 u_char *s = (u_char *)src, *d = (u_char *)dst; 1763 u_char *lim = s + 16, r; 1764 1765 while (s < lim) 1766 if ((r = (*d++ ^ *s++)) != 0) { 1767 while (r < 128) { 1768 match++; 1769 r <<= 1; 1770 } 1771 break; 1772 } else 1773 match += 8; 1774 return match; 1775 } 1776 1777 /* XXX: to be scope conscious */ 1778 int 1779 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1780 { 1781 int bytelen, bitlen; 1782 1783 /* sanity check */ 1784 if (0 > len || len > 128) { 1785 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1786 len); 1787 return (0); 1788 } 1789 1790 bytelen = len / 8; 1791 bitlen = len % 8; 1792 1793 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1794 return (0); 1795 if (bitlen != 0 && 1796 p1->s6_addr[bytelen] >> (8 - bitlen) != 1797 p2->s6_addr[bytelen] >> (8 - bitlen)) 1798 return (0); 1799 1800 return (1); 1801 } 1802 1803 void 1804 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1805 { 1806 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1807 int bytelen, bitlen, i; 1808 1809 /* sanity check */ 1810 if (0 > len || len > 128) { 1811 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1812 len); 1813 return; 1814 } 1815 1816 bzero(maskp, sizeof(*maskp)); 1817 bytelen = len / 8; 1818 bitlen = len % 8; 1819 for (i = 0; i < bytelen; i++) 1820 maskp->s6_addr[i] = 0xff; 1821 if (bitlen) 1822 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1823 } 1824 1825 /* 1826 * return the best address out of the same scope. if no address was 1827 * found, return the first valid address from designated IF. 1828 */ 1829 struct in6_ifaddr * 1830 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1831 { 1832 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1833 struct ifaddr *ifa; 1834 struct in6_ifaddr *besta = NULL; 1835 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1836 1837 NET_EPOCH_ASSERT(); 1838 1839 dep[0] = dep[1] = NULL; 1840 1841 /* 1842 * We first look for addresses in the same scope. 1843 * If there is one, return it. 1844 * If two or more, return one which matches the dst longest. 1845 * If none, return one of global addresses assigned other ifs. 1846 */ 1847 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1848 if (ifa->ifa_addr->sa_family != AF_INET6) 1849 continue; 1850 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1851 continue; /* XXX: is there any case to allow anycast? */ 1852 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1853 continue; /* don't use this interface */ 1854 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1855 continue; 1856 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1857 if (V_ip6_use_deprecated) 1858 dep[0] = (struct in6_ifaddr *)ifa; 1859 continue; 1860 } 1861 1862 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1863 /* 1864 * call in6_matchlen() as few as possible 1865 */ 1866 if (besta) { 1867 if (blen == -1) 1868 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1869 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1870 if (tlen > blen) { 1871 blen = tlen; 1872 besta = (struct in6_ifaddr *)ifa; 1873 } 1874 } else 1875 besta = (struct in6_ifaddr *)ifa; 1876 } 1877 } 1878 if (besta) { 1879 ifa_ref(&besta->ia_ifa); 1880 return (besta); 1881 } 1882 1883 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1884 if (ifa->ifa_addr->sa_family != AF_INET6) 1885 continue; 1886 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1887 continue; /* XXX: is there any case to allow anycast? */ 1888 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1889 continue; /* don't use this interface */ 1890 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1891 continue; 1892 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1893 if (V_ip6_use_deprecated) 1894 dep[1] = (struct in6_ifaddr *)ifa; 1895 continue; 1896 } 1897 1898 if (ifa != NULL) 1899 ifa_ref(ifa); 1900 return (struct in6_ifaddr *)ifa; 1901 } 1902 1903 /* use the last-resort values, that are, deprecated addresses */ 1904 if (dep[0]) { 1905 ifa_ref((struct ifaddr *)dep[0]); 1906 return dep[0]; 1907 } 1908 if (dep[1]) { 1909 ifa_ref((struct ifaddr *)dep[1]); 1910 return dep[1]; 1911 } 1912 1913 return NULL; 1914 } 1915 1916 /* 1917 * perform DAD when interface becomes IFF_UP. 1918 */ 1919 void 1920 in6_if_up(struct ifnet *ifp) 1921 { 1922 struct epoch_tracker et; 1923 struct ifaddr *ifa; 1924 struct in6_ifaddr *ia; 1925 1926 NET_EPOCH_ENTER(et); 1927 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1928 if (ifa->ifa_addr->sa_family != AF_INET6) 1929 continue; 1930 ia = (struct in6_ifaddr *)ifa; 1931 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1932 /* 1933 * The TENTATIVE flag was likely set by hand 1934 * beforehand, implicitly indicating the need for DAD. 1935 * We may be able to skip the random delay in this 1936 * case, but we impose delays just in case. 1937 */ 1938 nd6_dad_start(ifa, 1939 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1940 } 1941 } 1942 NET_EPOCH_EXIT(et); 1943 1944 /* 1945 * special cases, like 6to4, are handled in in6_ifattach 1946 */ 1947 in6_ifattach(ifp, NULL); 1948 } 1949 1950 int 1951 in6if_do_dad(struct ifnet *ifp) 1952 { 1953 1954 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1955 return (0); 1956 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1957 return (0); 1958 if ((ND_IFINFO(ifp)->flags & 1959 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0) 1960 return (0); 1961 return (1); 1962 } 1963 1964 /* 1965 * Calculate max IPv6 MTU through all the interfaces and store it 1966 * to in6_maxmtu. 1967 */ 1968 void 1969 in6_setmaxmtu(void) 1970 { 1971 struct epoch_tracker et; 1972 unsigned long maxmtu = 0; 1973 struct ifnet *ifp; 1974 1975 NET_EPOCH_ENTER(et); 1976 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1977 /* this function can be called during ifnet initialization */ 1978 if (!ifp->if_afdata[AF_INET6]) 1979 continue; 1980 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1981 IN6_LINKMTU(ifp) > maxmtu) 1982 maxmtu = IN6_LINKMTU(ifp); 1983 } 1984 NET_EPOCH_EXIT(et); 1985 if (maxmtu) /* update only when maxmtu is positive */ 1986 V_in6_maxmtu = maxmtu; 1987 } 1988 1989 /* 1990 * Provide the length of interface identifiers to be used for the link attached 1991 * to the given interface. The length should be defined in "IPv6 over 1992 * xxx-link" document. Note that address architecture might also define 1993 * the length for a particular set of address prefixes, regardless of the 1994 * link type. As clarified in rfc2462bis, those two definitions should be 1995 * consistent, and those really are as of August 2004. 1996 */ 1997 int 1998 in6_if2idlen(struct ifnet *ifp) 1999 { 2000 switch (ifp->if_type) { 2001 case IFT_ETHER: /* RFC2464 */ 2002 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2003 case IFT_L2VLAN: /* ditto */ 2004 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 2005 case IFT_INFINIBAND: 2006 return (64); 2007 case IFT_PPP: /* RFC2472 */ 2008 return (64); 2009 case IFT_FRELAY: /* RFC2590 */ 2010 return (64); 2011 case IFT_IEEE1394: /* RFC3146 */ 2012 return (64); 2013 case IFT_GIF: 2014 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2015 case IFT_LOOP: 2016 return (64); /* XXX: is this really correct? */ 2017 default: 2018 /* 2019 * Unknown link type: 2020 * It might be controversial to use the today's common constant 2021 * of 64 for these cases unconditionally. For full compliance, 2022 * we should return an error in this case. On the other hand, 2023 * if we simply miss the standard for the link type or a new 2024 * standard is defined for a new link type, the IFID length 2025 * is very likely to be the common constant. As a compromise, 2026 * we always use the constant, but make an explicit notice 2027 * indicating the "unknown" case. 2028 */ 2029 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2030 return (64); 2031 } 2032 } 2033 2034 struct in6_llentry { 2035 struct llentry base; 2036 }; 2037 2038 #define IN6_LLTBL_DEFAULT_HSIZE 32 2039 #define IN6_LLTBL_HASH(k, h) \ 2040 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2041 2042 /* 2043 * Do actual deallocation of @lle. 2044 */ 2045 static void 2046 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx) 2047 { 2048 struct llentry *lle; 2049 2050 lle = __containerof(ctx, struct llentry, lle_epoch_ctx); 2051 LLE_LOCK_DESTROY(lle); 2052 LLE_REQ_DESTROY(lle); 2053 free(lle, M_LLTABLE); 2054 } 2055 2056 /* 2057 * Called by LLE_FREE_LOCKED when number of references 2058 * drops to zero. 2059 */ 2060 static void 2061 in6_lltable_destroy_lle(struct llentry *lle) 2062 { 2063 2064 LLE_WUNLOCK(lle); 2065 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2066 } 2067 2068 static struct llentry * 2069 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2070 { 2071 struct in6_llentry *lle; 2072 2073 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2074 if (lle == NULL) /* NB: caller generates msg */ 2075 return NULL; 2076 2077 lle->base.r_l3addr.addr6 = *addr6; 2078 lle->base.lle_refcnt = 1; 2079 lle->base.lle_free = in6_lltable_destroy_lle; 2080 LLE_LOCK_INIT(&lle->base); 2081 LLE_REQ_INIT(&lle->base); 2082 callout_init(&lle->base.lle_timer, 1); 2083 2084 return (&lle->base); 2085 } 2086 2087 static int 2088 in6_lltable_match_prefix(const struct sockaddr *saddr, 2089 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2090 { 2091 const struct in6_addr *addr, *mask, *lle_addr; 2092 2093 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2094 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2095 lle_addr = &lle->r_l3addr.addr6; 2096 2097 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2098 return (0); 2099 2100 if (lle->la_flags & LLE_IFADDR) { 2101 2102 /* 2103 * Delete LLE_IFADDR records IFF address & flag matches. 2104 * Note that addr is the interface address within prefix 2105 * being matched. 2106 */ 2107 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2108 (flags & LLE_STATIC) != 0) 2109 return (1); 2110 return (0); 2111 } 2112 2113 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2114 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2115 return (1); 2116 2117 return (0); 2118 } 2119 2120 static void 2121 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2122 { 2123 struct ifnet *ifp; 2124 2125 LLE_WLOCK_ASSERT(lle); 2126 KASSERT(llt != NULL, ("lltable is NULL")); 2127 2128 /* Unlink entry from table */ 2129 if ((lle->la_flags & LLE_LINKED) != 0) { 2130 2131 ifp = llt->llt_ifp; 2132 IF_AFDATA_WLOCK_ASSERT(ifp); 2133 lltable_unlink_entry(llt, lle); 2134 } 2135 2136 llentry_free(lle); 2137 } 2138 2139 static int 2140 in6_lltable_rtcheck(struct ifnet *ifp, 2141 u_int flags, 2142 const struct sockaddr *l3addr) 2143 { 2144 const struct sockaddr_in6 *sin6; 2145 struct nhop_object *nh; 2146 struct in6_addr dst; 2147 uint32_t scopeid; 2148 char ip6buf[INET6_ADDRSTRLEN]; 2149 int fibnum; 2150 2151 NET_EPOCH_ASSERT(); 2152 KASSERT(l3addr->sa_family == AF_INET6, 2153 ("sin_family %d", l3addr->sa_family)); 2154 2155 sin6 = (const struct sockaddr_in6 *)l3addr; 2156 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2157 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2158 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0); 2159 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) { 2160 struct ifaddr *ifa; 2161 /* 2162 * Create an ND6 cache for an IPv6 neighbor 2163 * that is not covered by our own prefix. 2164 */ 2165 ifa = ifaof_ifpforaddr(l3addr, ifp); 2166 if (ifa != NULL) { 2167 return 0; 2168 } 2169 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2170 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2171 return EINVAL; 2172 } 2173 return 0; 2174 } 2175 2176 /* 2177 * Called by the datapath to indicate that the entry was used. 2178 */ 2179 static void 2180 in6_lltable_mark_used(struct llentry *lle) 2181 { 2182 2183 LLE_REQ_LOCK(lle); 2184 lle->r_skip_req = 0; 2185 2186 /* 2187 * Set the hit time so the callback function 2188 * can determine the remaining time before 2189 * transiting to the DELAY state. 2190 */ 2191 lle->lle_hittime = time_uptime; 2192 LLE_REQ_UNLOCK(lle); 2193 } 2194 2195 static inline uint32_t 2196 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2197 { 2198 2199 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2200 } 2201 2202 static uint32_t 2203 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2204 { 2205 2206 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2207 } 2208 2209 static void 2210 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2211 { 2212 struct sockaddr_in6 *sin6; 2213 2214 sin6 = (struct sockaddr_in6 *)sa; 2215 bzero(sin6, sizeof(*sin6)); 2216 sin6->sin6_family = AF_INET6; 2217 sin6->sin6_len = sizeof(*sin6); 2218 sin6->sin6_addr = lle->r_l3addr.addr6; 2219 } 2220 2221 static inline struct llentry * 2222 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2223 { 2224 struct llentry *lle; 2225 struct llentries *lleh; 2226 u_int hashidx; 2227 2228 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2229 lleh = &llt->lle_head[hashidx]; 2230 CK_LIST_FOREACH(lle, lleh, lle_next) { 2231 if (lle->la_flags & LLE_DELETED) 2232 continue; 2233 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2234 break; 2235 } 2236 2237 return (lle); 2238 } 2239 2240 static void 2241 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2242 { 2243 2244 lle->la_flags |= LLE_DELETED; 2245 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2246 #ifdef DIAGNOSTIC 2247 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2248 #endif 2249 llentry_free(lle); 2250 } 2251 2252 static struct llentry * 2253 in6_lltable_alloc(struct lltable *llt, u_int flags, 2254 const struct sockaddr *l3addr) 2255 { 2256 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2257 struct ifnet *ifp = llt->llt_ifp; 2258 struct llentry *lle; 2259 char linkhdr[LLE_MAX_LINKHDR]; 2260 size_t linkhdrsize; 2261 int lladdr_off; 2262 2263 KASSERT(l3addr->sa_family == AF_INET6, 2264 ("sin_family %d", l3addr->sa_family)); 2265 2266 /* 2267 * A route that covers the given address must have 2268 * been installed 1st because we are doing a resolution, 2269 * verify this. 2270 */ 2271 if (!(flags & LLE_IFADDR) && 2272 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2273 return (NULL); 2274 2275 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2276 if (lle == NULL) { 2277 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2278 return (NULL); 2279 } 2280 lle->la_flags = flags; 2281 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2282 linkhdrsize = LLE_MAX_LINKHDR; 2283 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2284 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2285 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2286 return (NULL); 2287 } 2288 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2289 lladdr_off); 2290 lle->la_flags |= LLE_STATIC; 2291 } 2292 2293 if ((lle->la_flags & LLE_STATIC) != 0) 2294 lle->ln_state = ND6_LLINFO_REACHABLE; 2295 2296 return (lle); 2297 } 2298 2299 static struct llentry * 2300 in6_lltable_lookup(struct lltable *llt, u_int flags, 2301 const struct sockaddr *l3addr) 2302 { 2303 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2304 struct llentry *lle; 2305 2306 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2307 KASSERT(l3addr->sa_family == AF_INET6, 2308 ("sin_family %d", l3addr->sa_family)); 2309 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) != 2310 (LLE_UNLOCKED | LLE_EXCLUSIVE), 2311 ("wrong lle request flags: %#x", flags)); 2312 2313 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2314 if (lle == NULL) 2315 return (NULL); 2316 if (flags & LLE_UNLOCKED) 2317 return (lle); 2318 2319 if (flags & LLE_EXCLUSIVE) 2320 LLE_WLOCK(lle); 2321 else 2322 LLE_RLOCK(lle); 2323 2324 /* 2325 * If the afdata lock is not held, the LLE may have been unlinked while 2326 * we were blocked on the LLE lock. Check for this case. 2327 */ 2328 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) { 2329 if (flags & LLE_EXCLUSIVE) 2330 LLE_WUNLOCK(lle); 2331 else 2332 LLE_RUNLOCK(lle); 2333 return (NULL); 2334 } 2335 return (lle); 2336 } 2337 2338 static int 2339 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2340 struct sysctl_req *wr) 2341 { 2342 struct ifnet *ifp = llt->llt_ifp; 2343 /* XXX stack use */ 2344 struct { 2345 struct rt_msghdr rtm; 2346 struct sockaddr_in6 sin6; 2347 /* 2348 * ndp.c assumes that sdl is word aligned 2349 */ 2350 #ifdef __LP64__ 2351 uint32_t pad; 2352 #endif 2353 struct sockaddr_dl sdl; 2354 } ndpc; 2355 struct sockaddr_dl *sdl; 2356 int error; 2357 2358 bzero(&ndpc, sizeof(ndpc)); 2359 /* skip deleted entries */ 2360 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2361 return (0); 2362 /* Skip if jailed and not a valid IP of the prison. */ 2363 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6); 2364 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0) 2365 return (0); 2366 /* 2367 * produce a msg made of: 2368 * struct rt_msghdr; 2369 * struct sockaddr_in6 (IPv6) 2370 * struct sockaddr_dl; 2371 */ 2372 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2373 ndpc.rtm.rtm_version = RTM_VERSION; 2374 ndpc.rtm.rtm_type = RTM_GET; 2375 ndpc.rtm.rtm_flags = RTF_UP; 2376 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2377 sa6_recoverscope(&ndpc.sin6); 2378 2379 /* publish */ 2380 if (lle->la_flags & LLE_PUB) 2381 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2382 2383 sdl = &ndpc.sdl; 2384 sdl->sdl_family = AF_LINK; 2385 sdl->sdl_len = sizeof(*sdl); 2386 sdl->sdl_index = ifp->if_index; 2387 sdl->sdl_type = ifp->if_type; 2388 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2389 sdl->sdl_alen = ifp->if_addrlen; 2390 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2391 } else { 2392 sdl->sdl_alen = 0; 2393 bzero(LLADDR(sdl), ifp->if_addrlen); 2394 } 2395 if (lle->la_expire != 0) 2396 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2397 lle->lle_remtime / hz + time_second - time_uptime; 2398 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2399 if (lle->la_flags & LLE_STATIC) 2400 ndpc.rtm.rtm_flags |= RTF_STATIC; 2401 if (lle->la_flags & LLE_IFADDR) 2402 ndpc.rtm.rtm_flags |= RTF_PINNED; 2403 if (lle->ln_router != 0) 2404 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2405 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2406 /* Store state in rmx_weight value */ 2407 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2408 ndpc.rtm.rtm_index = ifp->if_index; 2409 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2410 2411 return (error); 2412 } 2413 2414 static struct lltable * 2415 in6_lltattach(struct ifnet *ifp) 2416 { 2417 struct lltable *llt; 2418 2419 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2420 llt->llt_af = AF_INET6; 2421 llt->llt_ifp = ifp; 2422 2423 llt->llt_lookup = in6_lltable_lookup; 2424 llt->llt_alloc_entry = in6_lltable_alloc; 2425 llt->llt_delete_entry = in6_lltable_delete_entry; 2426 llt->llt_dump_entry = in6_lltable_dump_entry; 2427 llt->llt_hash = in6_lltable_hash; 2428 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2429 llt->llt_free_entry = in6_lltable_free_entry; 2430 llt->llt_match_prefix = in6_lltable_match_prefix; 2431 llt->llt_mark_used = in6_lltable_mark_used; 2432 lltable_link(llt); 2433 2434 return (llt); 2435 } 2436 2437 void * 2438 in6_domifattach(struct ifnet *ifp) 2439 { 2440 struct in6_ifextra *ext; 2441 2442 /* There are not IPv6-capable interfaces. */ 2443 switch (ifp->if_type) { 2444 case IFT_PFLOG: 2445 case IFT_PFSYNC: 2446 case IFT_USB: 2447 return (NULL); 2448 } 2449 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2450 bzero(ext, sizeof(*ext)); 2451 2452 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2453 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2454 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2455 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2456 2457 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2458 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2459 M_WAITOK); 2460 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2461 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2462 2463 ext->nd_ifinfo = nd6_ifattach(ifp); 2464 ext->scope6_id = scope6_ifattach(ifp); 2465 ext->lltable = in6_lltattach(ifp); 2466 2467 ext->mld_ifinfo = mld_domifattach(ifp); 2468 2469 return ext; 2470 } 2471 2472 int 2473 in6_domifmtu(struct ifnet *ifp) 2474 { 2475 if (ifp->if_afdata[AF_INET6] == NULL) 2476 return ifp->if_mtu; 2477 2478 return (IN6_LINKMTU(ifp)); 2479 } 2480 2481 void 2482 in6_domifdetach(struct ifnet *ifp, void *aux) 2483 { 2484 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2485 2486 mld_domifdetach(ifp); 2487 scope6_ifdetach(ext->scope6_id); 2488 nd6_ifdetach(ifp, ext->nd_ifinfo); 2489 lltable_free(ext->lltable); 2490 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2491 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2492 free(ext->in6_ifstat, M_IFADDR); 2493 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2494 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2495 free(ext->icmp6_ifstat, M_IFADDR); 2496 free(ext, M_IFADDR); 2497 } 2498 2499 /* 2500 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2501 * v4 mapped addr or v4 compat addr 2502 */ 2503 void 2504 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2505 { 2506 2507 bzero(sin, sizeof(*sin)); 2508 sin->sin_len = sizeof(struct sockaddr_in); 2509 sin->sin_family = AF_INET; 2510 sin->sin_port = sin6->sin6_port; 2511 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2512 } 2513 2514 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2515 void 2516 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2517 { 2518 bzero(sin6, sizeof(*sin6)); 2519 sin6->sin6_len = sizeof(struct sockaddr_in6); 2520 sin6->sin6_family = AF_INET6; 2521 sin6->sin6_port = sin->sin_port; 2522 sin6->sin6_addr.s6_addr32[0] = 0; 2523 sin6->sin6_addr.s6_addr32[1] = 0; 2524 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2525 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2526 } 2527 2528 /* Convert sockaddr_in6 into sockaddr_in. */ 2529 void 2530 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2531 { 2532 struct sockaddr_in *sin_p; 2533 struct sockaddr_in6 sin6; 2534 2535 /* 2536 * Save original sockaddr_in6 addr and convert it 2537 * to sockaddr_in. 2538 */ 2539 sin6 = *(struct sockaddr_in6 *)nam; 2540 sin_p = (struct sockaddr_in *)nam; 2541 in6_sin6_2_sin(sin_p, &sin6); 2542 } 2543 2544 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2545 void 2546 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2547 { 2548 struct sockaddr_in *sin_p; 2549 struct sockaddr_in6 *sin6_p; 2550 2551 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2552 sin_p = (struct sockaddr_in *)*nam; 2553 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2554 free(*nam, M_SONAME); 2555 *nam = (struct sockaddr *)sin6_p; 2556 } 2557