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/route_ctl.h> 95 #include <net/route/nhop.h> 96 #include <net/if_dl.h> 97 #include <net/vnet.h> 98 99 #include <netinet/in.h> 100 #include <netinet/in_var.h> 101 #include <net/if_llatbl.h> 102 #include <netinet/if_ether.h> 103 #include <netinet/in_systm.h> 104 #include <netinet/ip.h> 105 #include <netinet/in_pcb.h> 106 #include <netinet/ip_carp.h> 107 108 #include <netinet/ip6.h> 109 #include <netinet6/ip6_var.h> 110 #include <netinet6/nd6.h> 111 #include <netinet6/mld6_var.h> 112 #include <netinet6/ip6_mroute.h> 113 #include <netinet6/in6_ifattach.h> 114 #include <netinet6/scope6_var.h> 115 #include <netinet6/in6_fib.h> 116 #include <netinet6/in6_pcb.h> 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 void 169 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 170 { 171 struct rt_addrinfo info; 172 struct ifaddr *ifa; 173 struct sockaddr_dl gateway; 174 int fibnum; 175 176 ifa = &ia->ia_ifa; 177 178 /* 179 * Prepare info data for the host route. 180 * This code mimics one from ifa_maintain_loopback_route(). 181 */ 182 bzero(&info, sizeof(struct rt_addrinfo)); 183 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; 184 info.rti_info[RTAX_DST] = ifa->ifa_addr; 185 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gateway; 186 link_init_sdl(ifa->ifa_ifp, (struct sockaddr *)&gateway, ifa->ifa_ifp->if_type); 187 if (cmd != RTM_DELETE) 188 info.rti_ifp = V_loif; 189 190 fibnum = ia62ifa(ia)->ifa_ifp->if_fib; 191 192 if (cmd == RTM_ADD) { 193 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 194 rt_routemsg_info(cmd, &info, fibnum); 195 } else if (cmd == RTM_DELETE) { 196 rt_routemsg_info(cmd, &info, fibnum); 197 rt_addrmsg(cmd, &ia->ia_ifa, fibnum); 198 } 199 } 200 201 int 202 in6_mask2len(struct in6_addr *mask, u_char *lim0) 203 { 204 int x = 0, y; 205 u_char *lim = lim0, *p; 206 207 /* ignore the scope_id part */ 208 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 209 lim = (u_char *)mask + sizeof(*mask); 210 for (p = (u_char *)mask; p < lim; x++, p++) { 211 if (*p != 0xff) 212 break; 213 } 214 y = 0; 215 if (p < lim) { 216 for (y = 0; y < 8; y++) { 217 if ((*p & (0x80 >> y)) == 0) 218 break; 219 } 220 } 221 222 /* 223 * when the limit pointer is given, do a stricter check on the 224 * remaining bits. 225 */ 226 if (p < lim) { 227 if (y != 0 && (*p & (0x00ff >> y)) != 0) 228 return (-1); 229 for (p = p + 1; p < lim; p++) 230 if (*p != 0) 231 return (-1); 232 } 233 234 return x * 8 + y; 235 } 236 237 #ifdef COMPAT_FREEBSD32 238 struct in6_ndifreq32 { 239 char ifname[IFNAMSIZ]; 240 uint32_t ifindex; 241 }; 242 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 243 #endif 244 245 int 246 in6_control(struct socket *so, u_long cmd, caddr_t data, 247 struct ifnet *ifp, struct thread *td) 248 { 249 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 250 struct in6_ifaddr *ia = NULL; 251 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 252 struct sockaddr_in6 *sa6; 253 int carp_attached = 0; 254 int error; 255 u_long ocmd = cmd; 256 257 /* 258 * Compat to make pre-10.x ifconfig(8) operable. 259 */ 260 if (cmd == OSIOCAIFADDR_IN6) 261 cmd = SIOCAIFADDR_IN6; 262 263 switch (cmd) { 264 case SIOCGETSGCNT_IN6: 265 case SIOCGETMIFCNT_IN6: 266 /* 267 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 268 * We cannot see how that would be needed, so do not adjust the 269 * KPI blindly; more likely should clean up the IPv4 variant. 270 */ 271 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 272 } 273 274 switch (cmd) { 275 case SIOCAADDRCTL_POLICY: 276 case SIOCDADDRCTL_POLICY: 277 if (td != NULL) { 278 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 279 if (error) 280 return (error); 281 } 282 return (in6_src_ioctl(cmd, data)); 283 } 284 285 if (ifp == NULL) 286 return (EOPNOTSUPP); 287 288 switch (cmd) { 289 case SIOCSNDFLUSH_IN6: 290 case SIOCSPFXFLUSH_IN6: 291 case SIOCSRTRFLUSH_IN6: 292 case SIOCSDEFIFACE_IN6: 293 case SIOCSIFINFO_FLAGS: 294 case SIOCSIFINFO_IN6: 295 if (td != NULL) { 296 error = priv_check(td, PRIV_NETINET_ND6); 297 if (error) 298 return (error); 299 } 300 /* FALLTHROUGH */ 301 case OSIOCGIFINFO_IN6: 302 case SIOCGIFINFO_IN6: 303 case SIOCGNBRINFO_IN6: 304 case SIOCGDEFIFACE_IN6: 305 return (nd6_ioctl(cmd, data, ifp)); 306 307 #ifdef COMPAT_FREEBSD32 308 case SIOCGDEFIFACE32_IN6: 309 { 310 struct in6_ndifreq ndif; 311 struct in6_ndifreq32 *ndif32; 312 313 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 314 ifp); 315 if (error) 316 return (error); 317 ndif32 = (struct in6_ndifreq32 *)data; 318 ndif32->ifindex = ndif.ifindex; 319 return (0); 320 } 321 #endif 322 } 323 324 switch (cmd) { 325 case SIOCSIFPREFIX_IN6: 326 case SIOCDIFPREFIX_IN6: 327 case SIOCAIFPREFIX_IN6: 328 case SIOCCIFPREFIX_IN6: 329 case SIOCSGIFPREFIX_IN6: 330 case SIOCGIFPREFIX_IN6: 331 log(LOG_NOTICE, 332 "prefix ioctls are now invalidated. " 333 "please use ifconfig.\n"); 334 return (EOPNOTSUPP); 335 } 336 337 switch (cmd) { 338 case SIOCSSCOPE6: 339 if (td != NULL) { 340 error = priv_check(td, PRIV_NETINET_SCOPE6); 341 if (error) 342 return (error); 343 } 344 /* FALLTHROUGH */ 345 case SIOCGSCOPE6: 346 case SIOCGSCOPE6DEF: 347 return (scope6_ioctl(cmd, data, ifp)); 348 } 349 350 /* 351 * Find address for this interface, if it exists. 352 * 353 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 354 * only, and used the first interface address as the target of other 355 * operations (without checking ifra_addr). This was because netinet 356 * code/API assumed at most 1 interface address per interface. 357 * Since IPv6 allows a node to assign multiple addresses 358 * on a single interface, we almost always look and check the 359 * presence of ifra_addr, and reject invalid ones here. 360 * It also decreases duplicated code among SIOC*_IN6 operations. 361 */ 362 switch (cmd) { 363 case SIOCAIFADDR_IN6: 364 case SIOCSIFPHYADDR_IN6: 365 sa6 = &ifra->ifra_addr; 366 break; 367 case SIOCSIFADDR_IN6: 368 case SIOCGIFADDR_IN6: 369 case SIOCSIFDSTADDR_IN6: 370 case SIOCSIFNETMASK_IN6: 371 case SIOCGIFDSTADDR_IN6: 372 case SIOCGIFNETMASK_IN6: 373 case SIOCDIFADDR_IN6: 374 case SIOCGIFPSRCADDR_IN6: 375 case SIOCGIFPDSTADDR_IN6: 376 case SIOCGIFAFLAG_IN6: 377 case SIOCSNDFLUSH_IN6: 378 case SIOCSPFXFLUSH_IN6: 379 case SIOCSRTRFLUSH_IN6: 380 case SIOCGIFALIFETIME_IN6: 381 case SIOCGIFSTAT_IN6: 382 case SIOCGIFSTAT_ICMP6: 383 sa6 = &ifr->ifr_addr; 384 break; 385 case SIOCSIFADDR: 386 case SIOCSIFBRDADDR: 387 case SIOCSIFDSTADDR: 388 case SIOCSIFNETMASK: 389 /* 390 * Although we should pass any non-INET6 ioctl requests 391 * down to driver, we filter some legacy INET requests. 392 * Drivers trust SIOCSIFADDR et al to come from an already 393 * privileged layer, and do not perform any credentials 394 * checks or input validation. 395 */ 396 return (EINVAL); 397 default: 398 sa6 = NULL; 399 break; 400 } 401 if (sa6 && sa6->sin6_family == AF_INET6) { 402 if (sa6->sin6_scope_id != 0) 403 error = sa6_embedscope(sa6, 0); 404 else 405 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 406 if (error != 0) 407 return (error); 408 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 409 &sa6->sin6_addr)) != 0) 410 return (error); 411 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 412 } else 413 ia = NULL; 414 415 switch (cmd) { 416 case SIOCSIFADDR_IN6: 417 case SIOCSIFDSTADDR_IN6: 418 case SIOCSIFNETMASK_IN6: 419 /* 420 * Since IPv6 allows a node to assign multiple addresses 421 * on a single interface, SIOCSIFxxx ioctls are deprecated. 422 */ 423 /* we decided to obsolete this command (20000704) */ 424 error = EINVAL; 425 goto out; 426 427 case SIOCDIFADDR_IN6: 428 /* 429 * for IPv4, we look for existing in_ifaddr here to allow 430 * "ifconfig if0 delete" to remove the first IPv4 address on 431 * the interface. For IPv6, as the spec allows multiple 432 * interface address from the day one, we consider "remove the 433 * first one" semantics to be not preferable. 434 */ 435 if (ia == NULL) { 436 error = EADDRNOTAVAIL; 437 goto out; 438 } 439 /* FALLTHROUGH */ 440 case SIOCAIFADDR_IN6: 441 /* 442 * We always require users to specify a valid IPv6 address for 443 * the corresponding operation. 444 */ 445 if (ifra->ifra_addr.sin6_family != AF_INET6 || 446 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 447 error = EAFNOSUPPORT; 448 goto out; 449 } 450 451 if (td != NULL) { 452 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 453 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 454 if (error) 455 goto out; 456 } 457 /* FALLTHROUGH */ 458 case SIOCGIFSTAT_IN6: 459 case SIOCGIFSTAT_ICMP6: 460 if (ifp->if_afdata[AF_INET6] == NULL) { 461 error = EPFNOSUPPORT; 462 goto out; 463 } 464 break; 465 466 case SIOCGIFADDR_IN6: 467 /* This interface is basically deprecated. use SIOCGIFCONF. */ 468 /* FALLTHROUGH */ 469 case SIOCGIFAFLAG_IN6: 470 case SIOCGIFNETMASK_IN6: 471 case SIOCGIFDSTADDR_IN6: 472 case SIOCGIFALIFETIME_IN6: 473 /* must think again about its semantics */ 474 if (ia == NULL) { 475 error = EADDRNOTAVAIL; 476 goto out; 477 } 478 break; 479 } 480 481 switch (cmd) { 482 case SIOCGIFADDR_IN6: 483 ifr->ifr_addr = ia->ia_addr; 484 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 485 goto out; 486 break; 487 488 case SIOCGIFDSTADDR_IN6: 489 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 490 error = EINVAL; 491 goto out; 492 } 493 ifr->ifr_dstaddr = ia->ia_dstaddr; 494 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 495 goto out; 496 break; 497 498 case SIOCGIFNETMASK_IN6: 499 ifr->ifr_addr = ia->ia_prefixmask; 500 break; 501 502 case SIOCGIFAFLAG_IN6: 503 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 504 break; 505 506 case SIOCGIFSTAT_IN6: 507 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 508 ifp->if_afdata[AF_INET6])->in6_ifstat, 509 &ifr->ifr_ifru.ifru_stat, 510 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 511 break; 512 513 case SIOCGIFSTAT_ICMP6: 514 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 515 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 516 &ifr->ifr_ifru.ifru_icmp6stat, 517 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 518 break; 519 520 case SIOCGIFALIFETIME_IN6: 521 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 522 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 523 time_t maxexpire; 524 struct in6_addrlifetime *retlt = 525 &ifr->ifr_ifru.ifru_lifetime; 526 527 /* 528 * XXX: adjust expiration time assuming time_t is 529 * signed. 530 */ 531 maxexpire = (-1) & 532 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 533 if (ia->ia6_lifetime.ia6t_vltime < 534 maxexpire - ia->ia6_updatetime) { 535 retlt->ia6t_expire = ia->ia6_updatetime + 536 ia->ia6_lifetime.ia6t_vltime; 537 } else 538 retlt->ia6t_expire = maxexpire; 539 } 540 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 541 time_t maxexpire; 542 struct in6_addrlifetime *retlt = 543 &ifr->ifr_ifru.ifru_lifetime; 544 545 /* 546 * XXX: adjust expiration time assuming time_t is 547 * signed. 548 */ 549 maxexpire = (-1) & 550 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 551 if (ia->ia6_lifetime.ia6t_pltime < 552 maxexpire - ia->ia6_updatetime) { 553 retlt->ia6t_preferred = ia->ia6_updatetime + 554 ia->ia6_lifetime.ia6t_pltime; 555 } else 556 retlt->ia6t_preferred = maxexpire; 557 } 558 break; 559 560 case SIOCAIFADDR_IN6: 561 { 562 struct nd_prefixctl pr0; 563 struct nd_prefix *pr; 564 565 /* 566 * first, make or update the interface address structure, 567 * and link it to the list. 568 */ 569 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 570 goto out; 571 if (ia != NULL) { 572 if (ia->ia_ifa.ifa_carp) 573 (*carp_detach_p)(&ia->ia_ifa, true); 574 ifa_free(&ia->ia_ifa); 575 } 576 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 577 == NULL) { 578 /* 579 * this can happen when the user specify the 0 valid 580 * lifetime. 581 */ 582 break; 583 } 584 585 if (cmd == ocmd && ifra->ifra_vhid > 0) { 586 if (carp_attach_p != NULL) 587 error = (*carp_attach_p)(&ia->ia_ifa, 588 ifra->ifra_vhid); 589 else 590 error = EPROTONOSUPPORT; 591 if (error) 592 goto out; 593 else 594 carp_attached = 1; 595 } 596 597 /* 598 * then, make the prefix on-link on the interface. 599 * XXX: we'd rather create the prefix before the address, but 600 * we need at least one address to install the corresponding 601 * interface route, so we configure the address first. 602 */ 603 604 /* 605 * convert mask to prefix length (prefixmask has already 606 * been validated in in6_update_ifa(). 607 */ 608 bzero(&pr0, sizeof(pr0)); 609 pr0.ndpr_ifp = ifp; 610 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 611 NULL); 612 if (pr0.ndpr_plen == 128) { 613 /* we don't need to install a host route. */ 614 goto aifaddr_out; 615 } 616 pr0.ndpr_prefix = ifra->ifra_addr; 617 /* apply the mask for safety. */ 618 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 619 &ifra->ifra_prefixmask.sin6_addr); 620 621 /* 622 * XXX: since we don't have an API to set prefix (not address) 623 * lifetimes, we just use the same lifetimes as addresses. 624 * The (temporarily) installed lifetimes can be overridden by 625 * later advertised RAs (when accept_rtadv is non 0), which is 626 * an intended behavior. 627 */ 628 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 629 pr0.ndpr_raf_auto = 630 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 631 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 632 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 633 634 /* add the prefix if not yet. */ 635 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 636 /* 637 * nd6_prelist_add will install the corresponding 638 * interface route. 639 */ 640 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 641 if (carp_attached) 642 (*carp_detach_p)(&ia->ia_ifa, false); 643 goto out; 644 } 645 } 646 647 /* relate the address to the prefix */ 648 if (ia->ia6_ndpr == NULL) { 649 ia->ia6_ndpr = pr; 650 pr->ndpr_addrcnt++; 651 652 /* 653 * If this is the first autoconf address from the 654 * prefix, create a temporary address as well 655 * (when required). 656 */ 657 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 658 V_ip6_use_tempaddr && pr->ndpr_addrcnt == 1) { 659 int e; 660 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 661 log(LOG_NOTICE, "in6_control: failed " 662 "to create a temporary address, " 663 "errno=%d\n", e); 664 } 665 } 666 } 667 nd6_prefix_rele(pr); 668 669 /* 670 * this might affect the status of autoconfigured addresses, 671 * that is, this address might make other addresses detached. 672 */ 673 pfxlist_onlink_check(); 674 675 aifaddr_out: 676 /* 677 * Try to clear the flag when a new IPv6 address is added 678 * onto an IFDISABLED interface and it succeeds. 679 */ 680 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 681 struct in6_ndireq nd; 682 683 memset(&nd, 0, sizeof(nd)); 684 nd.ndi.flags = ND_IFINFO(ifp)->flags; 685 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 686 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 687 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 688 "SIOCSIFINFO_FLAGS for -ifdisabled " 689 "failed."); 690 /* 691 * Ignore failure of clearing the flag intentionally. 692 * The failure means address duplication was detected. 693 */ 694 } 695 break; 696 } 697 698 case SIOCDIFADDR_IN6: 699 { 700 struct nd_prefix *pr; 701 702 /* 703 * If the address being deleted is the only one that owns 704 * the corresponding prefix, expire the prefix as well. 705 * XXX: theoretically, we don't have to worry about such 706 * relationship, since we separate the address management 707 * and the prefix management. We do this, however, to provide 708 * as much backward compatibility as possible in terms of 709 * the ioctl operation. 710 * Note that in6_purgeaddr() will decrement ndpr_addrcnt. 711 */ 712 pr = ia->ia6_ndpr; 713 in6_purgeaddr(&ia->ia_ifa); 714 if (pr != NULL && pr->ndpr_addrcnt == 0) { 715 ND6_WLOCK(); 716 nd6_prefix_unlink(pr, NULL); 717 ND6_WUNLOCK(); 718 nd6_prefix_del(pr); 719 } 720 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 721 IFADDR_EVENT_DEL); 722 break; 723 } 724 725 default: 726 if (ifp->if_ioctl == NULL) { 727 error = EOPNOTSUPP; 728 goto out; 729 } 730 error = (*ifp->if_ioctl)(ifp, cmd, data); 731 goto out; 732 } 733 734 error = 0; 735 out: 736 if (ia != NULL) 737 ifa_free(&ia->ia_ifa); 738 return (error); 739 } 740 741 static struct in6_multi_mship * 742 in6_joingroup_legacy(struct ifnet *ifp, const struct in6_addr *mcaddr, 743 int *errorp, int delay) 744 { 745 struct in6_multi_mship *imm; 746 int error; 747 748 imm = malloc(sizeof(*imm), M_IP6MADDR, M_NOWAIT); 749 if (imm == NULL) { 750 *errorp = ENOBUFS; 751 return (NULL); 752 } 753 754 delay = (delay * PR_FASTHZ) / hz; 755 756 error = in6_joingroup(ifp, mcaddr, NULL, &imm->i6mm_maddr, delay); 757 if (error) { 758 *errorp = error; 759 free(imm, M_IP6MADDR); 760 return (NULL); 761 } 762 763 return (imm); 764 } 765 /* 766 * Join necessary multicast groups. Factored out from in6_update_ifa(). 767 * This entire work should only be done once, for the default FIB. 768 */ 769 static int 770 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 771 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 772 { 773 char ip6buf[INET6_ADDRSTRLEN]; 774 struct in6_addr mltaddr; 775 struct in6_multi_mship *imm; 776 int delay, error; 777 778 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 779 780 /* Join solicited multicast addr for new host id. */ 781 bzero(&mltaddr, sizeof(struct in6_addr)); 782 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 783 mltaddr.s6_addr32[2] = htonl(1); 784 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 785 mltaddr.s6_addr8[12] = 0xff; 786 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 787 /* XXX: should not happen */ 788 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 789 goto cleanup; 790 } 791 delay = error = 0; 792 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 793 /* 794 * We need a random delay for DAD on the address being 795 * configured. It also means delaying transmission of the 796 * corresponding MLD report to avoid report collision. 797 * [RFC 4861, Section 6.3.7] 798 */ 799 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 800 } 801 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 802 if (imm == NULL) { 803 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 804 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 805 if_name(ifp), error)); 806 goto cleanup; 807 } 808 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 809 *in6m_sol = imm->i6mm_maddr; 810 811 /* 812 * Join link-local all-nodes address. 813 */ 814 mltaddr = in6addr_linklocal_allnodes; 815 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 816 goto cleanup; /* XXX: should not fail */ 817 818 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 819 if (imm == NULL) { 820 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 821 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 822 if_name(ifp), error)); 823 goto cleanup; 824 } 825 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 826 827 /* 828 * Join node information group address. 829 */ 830 delay = 0; 831 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 832 /* 833 * The spec does not say anything about delay for this group, 834 * but the same logic should apply. 835 */ 836 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 837 } 838 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 839 /* XXX jinmei */ 840 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 841 if (imm == NULL) 842 nd6log((LOG_WARNING, 843 "%s: in6_joingroup failed for %s on %s " 844 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 845 &mltaddr), if_name(ifp), error)); 846 /* XXX not very fatal, go on... */ 847 else 848 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 849 } 850 if (V_icmp6_nodeinfo_oldmcprefix && 851 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 852 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, delay); 853 if (imm == NULL) 854 nd6log((LOG_WARNING, 855 "%s: in6_joingroup failed for %s on %s " 856 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 857 &mltaddr), if_name(ifp), error)); 858 /* XXX not very fatal, go on... */ 859 else 860 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 861 } 862 863 /* 864 * Join interface-local all-nodes address. 865 * (ff01::1%ifN, and ff01::%ifN/32) 866 */ 867 mltaddr = in6addr_nodelocal_allnodes; 868 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 869 goto cleanup; /* XXX: should not fail */ 870 871 imm = in6_joingroup_legacy(ifp, &mltaddr, &error, 0); 872 if (imm == NULL) { 873 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 874 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 875 &mltaddr), if_name(ifp), error)); 876 goto cleanup; 877 } 878 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 879 880 cleanup: 881 return (error); 882 } 883 884 /* 885 * Update parameters of an IPv6 interface address. 886 * If necessary, a new entry is created and linked into address chains. 887 * This function is separated from in6_control(). 888 */ 889 int 890 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 891 struct in6_ifaddr *ia, int flags) 892 { 893 int error, hostIsNew = 0; 894 895 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 896 return (error); 897 898 if (ia == NULL) { 899 hostIsNew = 1; 900 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 901 return (ENOBUFS); 902 } 903 904 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 905 if (error != 0) { 906 if (hostIsNew != 0) { 907 in6_unlink_ifa(ia, ifp); 908 ifa_free(&ia->ia_ifa); 909 } 910 return (error); 911 } 912 913 if (hostIsNew) 914 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 915 916 return (error); 917 } 918 919 /* 920 * Fill in basic IPv6 address request info. 921 */ 922 void 923 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 924 const struct in6_addr *mask) 925 { 926 927 memset(ifra, 0, sizeof(struct in6_aliasreq)); 928 929 ifra->ifra_addr.sin6_family = AF_INET6; 930 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 931 if (addr != NULL) 932 ifra->ifra_addr.sin6_addr = *addr; 933 934 ifra->ifra_prefixmask.sin6_family = AF_INET6; 935 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 936 if (mask != NULL) 937 ifra->ifra_prefixmask.sin6_addr = *mask; 938 } 939 940 static int 941 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 942 struct in6_ifaddr *ia, int flags) 943 { 944 int plen = -1; 945 struct sockaddr_in6 dst6; 946 struct in6_addrlifetime *lt; 947 char ip6buf[INET6_ADDRSTRLEN]; 948 949 /* Validate parameters */ 950 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 951 return (EINVAL); 952 953 /* 954 * The destination address for a p2p link must have a family 955 * of AF_UNSPEC or AF_INET6. 956 */ 957 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 958 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 959 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 960 return (EAFNOSUPPORT); 961 962 /* 963 * Validate address 964 */ 965 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 966 ifra->ifra_addr.sin6_family != AF_INET6) 967 return (EINVAL); 968 969 /* 970 * validate ifra_prefixmask. don't check sin6_family, netmask 971 * does not carry fields other than sin6_len. 972 */ 973 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 974 return (EINVAL); 975 /* 976 * Because the IPv6 address architecture is classless, we require 977 * users to specify a (non 0) prefix length (mask) for a new address. 978 * We also require the prefix (when specified) mask is valid, and thus 979 * reject a non-consecutive mask. 980 */ 981 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 982 return (EINVAL); 983 if (ifra->ifra_prefixmask.sin6_len != 0) { 984 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 985 (u_char *)&ifra->ifra_prefixmask + 986 ifra->ifra_prefixmask.sin6_len); 987 if (plen <= 0) 988 return (EINVAL); 989 } else { 990 /* 991 * In this case, ia must not be NULL. We just use its prefix 992 * length. 993 */ 994 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 995 } 996 /* 997 * If the destination address on a p2p interface is specified, 998 * and the address is a scoped one, validate/set the scope 999 * zone identifier. 1000 */ 1001 dst6 = ifra->ifra_dstaddr; 1002 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1003 (dst6.sin6_family == AF_INET6)) { 1004 struct in6_addr in6_tmp; 1005 u_int32_t zoneid; 1006 1007 in6_tmp = dst6.sin6_addr; 1008 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1009 return (EINVAL); /* XXX: should be impossible */ 1010 1011 if (dst6.sin6_scope_id != 0) { 1012 if (dst6.sin6_scope_id != zoneid) 1013 return (EINVAL); 1014 } else /* user omit to specify the ID. */ 1015 dst6.sin6_scope_id = zoneid; 1016 1017 /* convert into the internal form */ 1018 if (sa6_embedscope(&dst6, 0)) 1019 return (EINVAL); /* XXX: should be impossible */ 1020 } 1021 /* Modify original ifra_dstaddr to reflect changes */ 1022 ifra->ifra_dstaddr = dst6; 1023 1024 /* 1025 * The destination address can be specified only for a p2p or a 1026 * loopback interface. If specified, the corresponding prefix length 1027 * must be 128. 1028 */ 1029 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1030 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1031 /* XXX: noisy message */ 1032 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1033 "be specified for a p2p or a loopback IF only\n")); 1034 return (EINVAL); 1035 } 1036 if (plen != 128) { 1037 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1038 "be 128 when dstaddr is specified\n")); 1039 return (EINVAL); 1040 } 1041 } 1042 /* lifetime consistency check */ 1043 lt = &ifra->ifra_lifetime; 1044 if (lt->ia6t_pltime > lt->ia6t_vltime) 1045 return (EINVAL); 1046 if (lt->ia6t_vltime == 0) { 1047 /* 1048 * the following log might be noisy, but this is a typical 1049 * configuration mistake or a tool's bug. 1050 */ 1051 nd6log((LOG_INFO, 1052 "in6_update_ifa: valid lifetime is 0 for %s\n", 1053 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1054 1055 if (ia == NULL) 1056 return (0); /* there's nothing to do */ 1057 } 1058 1059 /* Check prefix mask */ 1060 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1061 /* 1062 * We prohibit changing the prefix length of an existing 1063 * address, because 1064 * + such an operation should be rare in IPv6, and 1065 * + the operation would confuse prefix management. 1066 */ 1067 if (ia->ia_prefixmask.sin6_len != 0 && 1068 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1069 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1070 "of an existing %s address should not be changed\n", 1071 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1072 1073 return (EINVAL); 1074 } 1075 } 1076 1077 return (0); 1078 } 1079 1080 /* 1081 * Allocate a new ifaddr and link it into chains. 1082 */ 1083 static struct in6_ifaddr * 1084 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1085 { 1086 struct in6_ifaddr *ia; 1087 1088 /* 1089 * When in6_alloc_ifa() is called in a process of a received 1090 * RA, it is called under an interrupt context. So, we should 1091 * call malloc with M_NOWAIT. 1092 */ 1093 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1094 if (ia == NULL) 1095 return (NULL); 1096 LIST_INIT(&ia->ia6_memberships); 1097 /* Initialize the address and masks, and put time stamp */ 1098 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1099 ia->ia_addr.sin6_family = AF_INET6; 1100 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1101 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1102 ia->ia_addr = ifra->ifra_addr; 1103 ia->ia6_createtime = time_uptime; 1104 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1105 /* 1106 * Some functions expect that ifa_dstaddr is not 1107 * NULL for p2p interfaces. 1108 */ 1109 ia->ia_ifa.ifa_dstaddr = 1110 (struct sockaddr *)&ia->ia_dstaddr; 1111 } else { 1112 ia->ia_ifa.ifa_dstaddr = NULL; 1113 } 1114 1115 /* set prefix mask if any */ 1116 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1117 if (ifra->ifra_prefixmask.sin6_len != 0) { 1118 ia->ia_prefixmask.sin6_family = AF_INET6; 1119 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1120 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1121 } 1122 1123 ia->ia_ifp = ifp; 1124 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1125 IF_ADDR_WLOCK(ifp); 1126 CK_STAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1127 IF_ADDR_WUNLOCK(ifp); 1128 1129 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1130 IN6_IFADDR_WLOCK(); 1131 CK_STAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1132 CK_LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1133 IN6_IFADDR_WUNLOCK(); 1134 1135 return (ia); 1136 } 1137 1138 /* 1139 * Update/configure interface address parameters: 1140 * 1141 * 1) Update lifetime 1142 * 2) Update interface metric ad flags 1143 * 3) Notify other subsystems 1144 */ 1145 static int 1146 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1147 struct in6_ifaddr *ia, int hostIsNew, int flags) 1148 { 1149 int error; 1150 1151 /* update timestamp */ 1152 ia->ia6_updatetime = time_uptime; 1153 1154 /* 1155 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1156 * to see if the address is deprecated or invalidated, but initialize 1157 * these members for applications. 1158 */ 1159 ia->ia6_lifetime = ifra->ifra_lifetime; 1160 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1161 ia->ia6_lifetime.ia6t_expire = 1162 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1163 } else 1164 ia->ia6_lifetime.ia6t_expire = 0; 1165 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1166 ia->ia6_lifetime.ia6t_preferred = 1167 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1168 } else 1169 ia->ia6_lifetime.ia6t_preferred = 0; 1170 1171 /* 1172 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1173 * userland, make it deprecated. 1174 */ 1175 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1176 ia->ia6_lifetime.ia6t_pltime = 0; 1177 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1178 } 1179 1180 /* 1181 * configure address flags. 1182 */ 1183 ia->ia6_flags = ifra->ifra_flags; 1184 1185 /* 1186 * Make the address tentative before joining multicast addresses, 1187 * so that corresponding MLD responses would not have a tentative 1188 * source address. 1189 */ 1190 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1191 1192 /* 1193 * DAD should be performed for an new address or addresses on 1194 * an interface with ND6_IFF_IFDISABLED. 1195 */ 1196 if (in6if_do_dad(ifp) && 1197 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1198 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1199 1200 /* notify other subsystems */ 1201 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1202 1203 return (error); 1204 } 1205 1206 /* 1207 * Do link-level ifa job: 1208 * 1) Add lle entry for added address 1209 * 2) Notifies routing socket users about new address 1210 * 3) join appropriate multicast group 1211 * 4) start DAD if enabled 1212 */ 1213 static int 1214 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1215 struct in6_ifaddr *ia, int flags) 1216 { 1217 struct in6_multi *in6m_sol; 1218 int error = 0; 1219 1220 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1221 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1222 in6_purgeaddr(&ia->ia_ifa); 1223 ifa_free(&ia->ia_ifa); 1224 return (error); 1225 } 1226 1227 /* Join necessary multicast groups. */ 1228 in6m_sol = NULL; 1229 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1230 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1231 if (error != 0) { 1232 in6_purgeaddr(&ia->ia_ifa); 1233 ifa_free(&ia->ia_ifa); 1234 return (error); 1235 } 1236 } 1237 1238 /* Perform DAD, if the address is TENTATIVE. */ 1239 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1240 int delay, mindelay, maxdelay; 1241 1242 delay = 0; 1243 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1244 /* 1245 * We need to impose a delay before sending an NS 1246 * for DAD. Check if we also needed a delay for the 1247 * corresponding MLD message. If we did, the delay 1248 * should be larger than the MLD delay (this could be 1249 * relaxed a bit, but this simple logic is at least 1250 * safe). 1251 * XXX: Break data hiding guidelines and look at 1252 * state for the solicited multicast group. 1253 */ 1254 mindelay = 0; 1255 if (in6m_sol != NULL && 1256 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1257 mindelay = in6m_sol->in6m_timer; 1258 } 1259 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1260 if (maxdelay - mindelay == 0) 1261 delay = 0; 1262 else { 1263 delay = 1264 (arc4random() % (maxdelay - mindelay)) + 1265 mindelay; 1266 } 1267 } 1268 nd6_dad_start((struct ifaddr *)ia, delay); 1269 } 1270 1271 in6_newaddrmsg(ia, RTM_ADD); 1272 ifa_free(&ia->ia_ifa); 1273 return (error); 1274 } 1275 1276 /* 1277 * Adds or deletes interface route for p2p ifa. 1278 * Returns 0 on success or errno. 1279 */ 1280 static int 1281 in6_handle_dstaddr_rtrequest(int cmd, struct in6_ifaddr *ia) 1282 { 1283 struct epoch_tracker et; 1284 struct ifaddr *ifa = &ia->ia_ifa; 1285 int error; 1286 1287 /* Prepare gateway */ 1288 struct sockaddr_dl_short sdl = { 1289 .sdl_family = AF_LINK, 1290 .sdl_len = sizeof(struct sockaddr_dl_short), 1291 .sdl_type = ifa->ifa_ifp->if_type, 1292 .sdl_index = ifa->ifa_ifp->if_index, 1293 }; 1294 1295 struct sockaddr_in6 dst = { 1296 .sin6_family = AF_INET6, 1297 .sin6_len = sizeof(struct sockaddr_in6), 1298 .sin6_addr = ia->ia_dstaddr.sin6_addr, 1299 }; 1300 1301 struct rt_addrinfo info = { 1302 .rti_ifa = ifa, 1303 .rti_flags = RTF_PINNED | RTF_HOST, 1304 .rti_info = { 1305 [RTAX_DST] = (struct sockaddr *)&dst, 1306 [RTAX_GATEWAY] = (struct sockaddr *)&sdl, 1307 }, 1308 }; 1309 /* Don't set additional per-gw filters on removal */ 1310 1311 NET_EPOCH_ENTER(et); 1312 error = rib_handle_ifaddr_info(ifa->ifa_ifp->if_fib, cmd, &info); 1313 NET_EPOCH_EXIT(et); 1314 1315 return (error); 1316 } 1317 1318 void 1319 in6_purgeaddr(struct ifaddr *ifa) 1320 { 1321 struct ifnet *ifp = ifa->ifa_ifp; 1322 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1323 struct in6_multi_mship *imm; 1324 int plen, error; 1325 1326 if (ifa->ifa_carp) 1327 (*carp_detach_p)(ifa, false); 1328 1329 /* 1330 * Remove the loopback route to the interface address. 1331 * The check for the current setting of "nd6_useloopback" 1332 * is not needed. 1333 */ 1334 if (ia->ia_flags & IFA_RTSELF) { 1335 error = ifa_del_loopback_route((struct ifaddr *)ia, 1336 (struct sockaddr *)&ia->ia_addr); 1337 if (error == 0) 1338 ia->ia_flags &= ~IFA_RTSELF; 1339 } 1340 1341 /* stop DAD processing */ 1342 nd6_dad_stop(ifa); 1343 1344 /* Leave multicast groups. */ 1345 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1346 LIST_REMOVE(imm, i6mm_chain); 1347 if (imm->i6mm_maddr != NULL) 1348 in6_leavegroup(imm->i6mm_maddr, NULL); 1349 free(imm, M_IP6MADDR); 1350 } 1351 /* Check if we need to remove p2p route */ 1352 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1353 if (ia->ia_dstaddr.sin6_family != AF_INET6) 1354 plen = 0; 1355 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1356 error = in6_handle_dstaddr_rtrequest(RTM_DELETE, ia); 1357 if (error != 0) 1358 log(LOG_INFO, "%s: err=%d, destination address delete " 1359 "failed\n", __func__, error); 1360 ia->ia_flags &= ~IFA_ROUTE; 1361 } 1362 1363 in6_newaddrmsg(ia, RTM_DELETE); 1364 in6_unlink_ifa(ia, ifp); 1365 } 1366 1367 static void 1368 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1369 { 1370 char ip6buf[INET6_ADDRSTRLEN]; 1371 int remove_lle; 1372 1373 IF_ADDR_WLOCK(ifp); 1374 CK_STAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifaddr, ifa_link); 1375 IF_ADDR_WUNLOCK(ifp); 1376 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1377 1378 /* 1379 * Defer the release of what might be the last reference to the 1380 * in6_ifaddr so that it can't be freed before the remainder of the 1381 * cleanup. 1382 */ 1383 IN6_IFADDR_WLOCK(); 1384 CK_STAILQ_REMOVE(&V_in6_ifaddrhead, ia, in6_ifaddr, ia_link); 1385 CK_LIST_REMOVE(ia, ia6_hash); 1386 IN6_IFADDR_WUNLOCK(); 1387 1388 /* 1389 * Release the reference to the base prefix. There should be a 1390 * positive reference. 1391 */ 1392 remove_lle = 0; 1393 if (ia->ia6_ndpr == NULL) { 1394 nd6log((LOG_NOTICE, 1395 "in6_unlink_ifa: autoconf'ed address " 1396 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1397 } else { 1398 ia->ia6_ndpr->ndpr_addrcnt--; 1399 /* Do not delete lles within prefix if refcont != 0 */ 1400 if (ia->ia6_ndpr->ndpr_addrcnt == 0) 1401 remove_lle = 1; 1402 ia->ia6_ndpr = NULL; 1403 } 1404 1405 nd6_rem_ifa_lle(ia, remove_lle); 1406 1407 /* 1408 * Also, if the address being removed is autoconf'ed, call 1409 * pfxlist_onlink_check() since the release might affect the status of 1410 * other (detached) addresses. 1411 */ 1412 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1413 pfxlist_onlink_check(); 1414 } 1415 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1416 } 1417 1418 /* 1419 * Notifies other subsystems about address change/arrival: 1420 * 1) Notifies device handler on the first IPv6 address assignment 1421 * 2) Handle routing table changes for P2P links and route 1422 * 3) Handle routing table changes for address host route 1423 */ 1424 static int 1425 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1426 struct in6_aliasreq *ifra, int hostIsNew) 1427 { 1428 int error = 0, plen, ifacount = 0; 1429 struct ifaddr *ifa; 1430 struct sockaddr_in6 *pdst; 1431 char ip6buf[INET6_ADDRSTRLEN]; 1432 1433 /* 1434 * Give the interface a chance to initialize 1435 * if this is its first address, 1436 */ 1437 if (hostIsNew != 0) { 1438 struct epoch_tracker et; 1439 1440 NET_EPOCH_ENTER(et); 1441 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1442 if (ifa->ifa_addr->sa_family != AF_INET6) 1443 continue; 1444 ifacount++; 1445 } 1446 NET_EPOCH_EXIT(et); 1447 } 1448 1449 if (ifacount <= 1 && ifp->if_ioctl) { 1450 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1451 if (error) 1452 goto done; 1453 } 1454 1455 /* 1456 * If a new destination address is specified, scrub the old one and 1457 * install the new destination. Note that the interface must be 1458 * p2p or loopback. 1459 */ 1460 pdst = &ifra->ifra_dstaddr; 1461 if (pdst->sin6_family == AF_INET6 && 1462 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1463 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1464 (in6_handle_dstaddr_rtrequest(RTM_DELETE, ia) != 0)) { 1465 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1466 "remove a route to the old destination: %s\n", 1467 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1468 /* proceed anyway... */ 1469 } else 1470 ia->ia_flags &= ~IFA_ROUTE; 1471 ia->ia_dstaddr = *pdst; 1472 } 1473 1474 /* 1475 * If a new destination address is specified for a point-to-point 1476 * interface, install a route to the destination as an interface 1477 * direct route. 1478 * XXX: the logic below rejects assigning multiple addresses on a p2p 1479 * interface that share the same destination. 1480 */ 1481 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1482 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1483 ia->ia_dstaddr.sin6_family == AF_INET6) { 1484 /* 1485 * Handle the case for ::1 . 1486 */ 1487 if (ifp->if_flags & IFF_LOOPBACK) 1488 ia->ia_flags |= IFA_RTSELF; 1489 error = in6_handle_dstaddr_rtrequest(RTM_ADD, ia); 1490 if (error) 1491 goto done; 1492 ia->ia_flags |= IFA_ROUTE; 1493 } 1494 1495 /* 1496 * add a loopback route to self if not exists 1497 */ 1498 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1499 error = ifa_add_loopback_route((struct ifaddr *)ia, 1500 (struct sockaddr *)&ia->ia_addr); 1501 if (error == 0) 1502 ia->ia_flags |= IFA_RTSELF; 1503 } 1504 done: 1505 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1506 "Invoking IPv6 network device address event may sleep"); 1507 1508 ifa_ref(&ia->ia_ifa); 1509 EVENTHANDLER_INVOKE(ifaddr_event_ext, ifp, &ia->ia_ifa, 1510 IFADDR_EVENT_ADD); 1511 ifa_free(&ia->ia_ifa); 1512 1513 return (error); 1514 } 1515 1516 /* 1517 * Find an IPv6 interface link-local address specific to an interface. 1518 * ifaddr is returned referenced. 1519 */ 1520 struct in6_ifaddr * 1521 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1522 { 1523 struct ifaddr *ifa; 1524 1525 NET_EPOCH_ASSERT(); 1526 1527 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1528 if (ifa->ifa_addr->sa_family != AF_INET6) 1529 continue; 1530 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1531 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1532 ignoreflags) != 0) 1533 continue; 1534 ifa_ref(ifa); 1535 break; 1536 } 1537 } 1538 1539 return ((struct in6_ifaddr *)ifa); 1540 } 1541 1542 /* 1543 * find the interface address corresponding to a given IPv6 address. 1544 * ifaddr is returned referenced. 1545 */ 1546 struct in6_ifaddr * 1547 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1548 { 1549 struct rm_priotracker in6_ifa_tracker; 1550 struct in6_ifaddr *ia; 1551 1552 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1553 CK_LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1554 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1555 if (zoneid != 0 && 1556 zoneid != ia->ia_addr.sin6_scope_id) 1557 continue; 1558 ifa_ref(&ia->ia_ifa); 1559 break; 1560 } 1561 } 1562 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1563 return (ia); 1564 } 1565 1566 /* 1567 * find the internet address corresponding to a given interface and address. 1568 * ifaddr is returned referenced. 1569 */ 1570 struct in6_ifaddr * 1571 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1572 { 1573 struct epoch_tracker et; 1574 struct ifaddr *ifa; 1575 1576 NET_EPOCH_ENTER(et); 1577 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1578 if (ifa->ifa_addr->sa_family != AF_INET6) 1579 continue; 1580 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1581 ifa_ref(ifa); 1582 break; 1583 } 1584 } 1585 NET_EPOCH_EXIT(et); 1586 1587 return ((struct in6_ifaddr *)ifa); 1588 } 1589 1590 /* 1591 * Find a link-local scoped address on ifp and return it if any. 1592 */ 1593 struct in6_ifaddr * 1594 in6ifa_llaonifp(struct ifnet *ifp) 1595 { 1596 struct epoch_tracker et; 1597 struct sockaddr_in6 *sin6; 1598 struct ifaddr *ifa; 1599 1600 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1601 return (NULL); 1602 NET_EPOCH_ENTER(et); 1603 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1604 if (ifa->ifa_addr->sa_family != AF_INET6) 1605 continue; 1606 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1607 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1608 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1609 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1610 break; 1611 } 1612 NET_EPOCH_EXIT(et); 1613 1614 return ((struct in6_ifaddr *)ifa); 1615 } 1616 1617 /* 1618 * Convert IP6 address to printable (loggable) representation. Caller 1619 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1620 */ 1621 static char digits[] = "0123456789abcdef"; 1622 char * 1623 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1624 { 1625 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1626 char *cp; 1627 const u_int16_t *a = (const u_int16_t *)addr; 1628 const u_int8_t *d; 1629 int dcolon = 0, zero = 0; 1630 1631 cp = ip6buf; 1632 1633 for (i = 0; i < 8; i++) { 1634 if (*(a + i) == 0) { 1635 cnt++; 1636 if (cnt == 1) 1637 idx = i; 1638 } 1639 else if (maxcnt < cnt) { 1640 maxcnt = cnt; 1641 index = idx; 1642 cnt = 0; 1643 } 1644 } 1645 if (maxcnt < cnt) { 1646 maxcnt = cnt; 1647 index = idx; 1648 } 1649 1650 for (i = 0; i < 8; i++) { 1651 if (dcolon == 1) { 1652 if (*a == 0) { 1653 if (i == 7) 1654 *cp++ = ':'; 1655 a++; 1656 continue; 1657 } else 1658 dcolon = 2; 1659 } 1660 if (*a == 0) { 1661 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1662 if (i == 0) 1663 *cp++ = ':'; 1664 *cp++ = ':'; 1665 dcolon = 1; 1666 } else { 1667 *cp++ = '0'; 1668 *cp++ = ':'; 1669 } 1670 a++; 1671 continue; 1672 } 1673 d = (const u_char *)a; 1674 /* Try to eliminate leading zeros in printout like in :0001. */ 1675 zero = 1; 1676 *cp = digits[*d >> 4]; 1677 if (*cp != '0') { 1678 zero = 0; 1679 cp++; 1680 } 1681 *cp = digits[*d++ & 0xf]; 1682 if (zero == 0 || (*cp != '0')) { 1683 zero = 0; 1684 cp++; 1685 } 1686 *cp = digits[*d >> 4]; 1687 if (zero == 0 || (*cp != '0')) { 1688 zero = 0; 1689 cp++; 1690 } 1691 *cp++ = digits[*d & 0xf]; 1692 *cp++ = ':'; 1693 a++; 1694 } 1695 *--cp = '\0'; 1696 return (ip6buf); 1697 } 1698 1699 int 1700 in6_localaddr(struct in6_addr *in6) 1701 { 1702 struct rm_priotracker in6_ifa_tracker; 1703 struct in6_ifaddr *ia; 1704 1705 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1706 return 1; 1707 1708 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1709 CK_STAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1710 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1711 &ia->ia_prefixmask.sin6_addr)) { 1712 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1713 return 1; 1714 } 1715 } 1716 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1717 1718 return (0); 1719 } 1720 1721 /* 1722 * Return 1 if an internet address is for the local host and configured 1723 * on one of its interfaces. 1724 */ 1725 int 1726 in6_localip(struct in6_addr *in6) 1727 { 1728 struct rm_priotracker in6_ifa_tracker; 1729 struct in6_ifaddr *ia; 1730 1731 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1732 CK_LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1733 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1734 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1735 return (1); 1736 } 1737 } 1738 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1739 return (0); 1740 } 1741 1742 /* 1743 * Return 1 if an internet address is configured on an interface. 1744 */ 1745 int 1746 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1747 { 1748 struct in6_addr in6; 1749 struct ifaddr *ifa; 1750 struct in6_ifaddr *ia6; 1751 1752 NET_EPOCH_ASSERT(); 1753 1754 in6 = *addr; 1755 if (in6_clearscope(&in6)) 1756 return (0); 1757 in6_setscope(&in6, ifp, NULL); 1758 1759 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1760 if (ifa->ifa_addr->sa_family != AF_INET6) 1761 continue; 1762 ia6 = (struct in6_ifaddr *)ifa; 1763 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) 1764 return (1); 1765 } 1766 1767 return (0); 1768 } 1769 1770 int 1771 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1772 { 1773 struct rm_priotracker in6_ifa_tracker; 1774 struct in6_ifaddr *ia; 1775 1776 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1777 CK_LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1778 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1779 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1780 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1781 return (1); /* true */ 1782 } 1783 break; 1784 } 1785 } 1786 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1787 1788 return (0); /* false */ 1789 } 1790 1791 /* 1792 * return length of part which dst and src are equal 1793 * hard coding... 1794 */ 1795 int 1796 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1797 { 1798 int match = 0; 1799 u_char *s = (u_char *)src, *d = (u_char *)dst; 1800 u_char *lim = s + 16, r; 1801 1802 while (s < lim) 1803 if ((r = (*d++ ^ *s++)) != 0) { 1804 while (r < 128) { 1805 match++; 1806 r <<= 1; 1807 } 1808 break; 1809 } else 1810 match += 8; 1811 return match; 1812 } 1813 1814 /* XXX: to be scope conscious */ 1815 int 1816 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1817 { 1818 int bytelen, bitlen; 1819 1820 /* sanity check */ 1821 if (0 > len || len > 128) { 1822 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1823 len); 1824 return (0); 1825 } 1826 1827 bytelen = len / 8; 1828 bitlen = len % 8; 1829 1830 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1831 return (0); 1832 if (bitlen != 0 && 1833 p1->s6_addr[bytelen] >> (8 - bitlen) != 1834 p2->s6_addr[bytelen] >> (8 - bitlen)) 1835 return (0); 1836 1837 return (1); 1838 } 1839 1840 void 1841 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1842 { 1843 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1844 int bytelen, bitlen, i; 1845 1846 /* sanity check */ 1847 if (0 > len || len > 128) { 1848 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1849 len); 1850 return; 1851 } 1852 1853 bzero(maskp, sizeof(*maskp)); 1854 bytelen = len / 8; 1855 bitlen = len % 8; 1856 for (i = 0; i < bytelen; i++) 1857 maskp->s6_addr[i] = 0xff; 1858 if (bitlen) 1859 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1860 } 1861 1862 /* 1863 * return the best address out of the same scope. if no address was 1864 * found, return the first valid address from designated IF. 1865 */ 1866 struct in6_ifaddr * 1867 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1868 { 1869 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1870 struct ifaddr *ifa; 1871 struct in6_ifaddr *besta = NULL; 1872 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1873 1874 NET_EPOCH_ASSERT(); 1875 1876 dep[0] = dep[1] = NULL; 1877 1878 /* 1879 * We first look for addresses in the same scope. 1880 * If there is one, return it. 1881 * If two or more, return one which matches the dst longest. 1882 * If none, return one of global addresses assigned other ifs. 1883 */ 1884 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1885 if (ifa->ifa_addr->sa_family != AF_INET6) 1886 continue; 1887 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1888 continue; /* XXX: is there any case to allow anycast? */ 1889 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1890 continue; /* don't use this interface */ 1891 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1892 continue; 1893 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1894 if (V_ip6_use_deprecated) 1895 dep[0] = (struct in6_ifaddr *)ifa; 1896 continue; 1897 } 1898 1899 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1900 /* 1901 * call in6_matchlen() as few as possible 1902 */ 1903 if (besta) { 1904 if (blen == -1) 1905 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1906 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1907 if (tlen > blen) { 1908 blen = tlen; 1909 besta = (struct in6_ifaddr *)ifa; 1910 } 1911 } else 1912 besta = (struct in6_ifaddr *)ifa; 1913 } 1914 } 1915 if (besta) { 1916 ifa_ref(&besta->ia_ifa); 1917 return (besta); 1918 } 1919 1920 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1921 if (ifa->ifa_addr->sa_family != AF_INET6) 1922 continue; 1923 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1924 continue; /* XXX: is there any case to allow anycast? */ 1925 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1926 continue; /* don't use this interface */ 1927 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1928 continue; 1929 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1930 if (V_ip6_use_deprecated) 1931 dep[1] = (struct in6_ifaddr *)ifa; 1932 continue; 1933 } 1934 1935 if (ifa != NULL) 1936 ifa_ref(ifa); 1937 return (struct in6_ifaddr *)ifa; 1938 } 1939 1940 /* use the last-resort values, that are, deprecated addresses */ 1941 if (dep[0]) { 1942 ifa_ref((struct ifaddr *)dep[0]); 1943 return dep[0]; 1944 } 1945 if (dep[1]) { 1946 ifa_ref((struct ifaddr *)dep[1]); 1947 return dep[1]; 1948 } 1949 1950 return NULL; 1951 } 1952 1953 /* 1954 * perform DAD when interface becomes IFF_UP. 1955 */ 1956 void 1957 in6_if_up(struct ifnet *ifp) 1958 { 1959 struct epoch_tracker et; 1960 struct ifaddr *ifa; 1961 struct in6_ifaddr *ia; 1962 1963 NET_EPOCH_ENTER(et); 1964 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1965 if (ifa->ifa_addr->sa_family != AF_INET6) 1966 continue; 1967 ia = (struct in6_ifaddr *)ifa; 1968 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1969 /* 1970 * The TENTATIVE flag was likely set by hand 1971 * beforehand, implicitly indicating the need for DAD. 1972 * We may be able to skip the random delay in this 1973 * case, but we impose delays just in case. 1974 */ 1975 nd6_dad_start(ifa, 1976 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1977 } 1978 } 1979 NET_EPOCH_EXIT(et); 1980 1981 /* 1982 * special cases, like 6to4, are handled in in6_ifattach 1983 */ 1984 in6_ifattach(ifp, NULL); 1985 } 1986 1987 int 1988 in6if_do_dad(struct ifnet *ifp) 1989 { 1990 1991 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1992 return (0); 1993 if ((ifp->if_flags & IFF_MULTICAST) == 0) 1994 return (0); 1995 if ((ND_IFINFO(ifp)->flags & 1996 (ND6_IFF_IFDISABLED | ND6_IFF_NO_DAD)) != 0) 1997 return (0); 1998 return (1); 1999 } 2000 2001 /* 2002 * Calculate max IPv6 MTU through all the interfaces and store it 2003 * to in6_maxmtu. 2004 */ 2005 void 2006 in6_setmaxmtu(void) 2007 { 2008 struct epoch_tracker et; 2009 unsigned long maxmtu = 0; 2010 struct ifnet *ifp; 2011 2012 NET_EPOCH_ENTER(et); 2013 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2014 /* this function can be called during ifnet initialization */ 2015 if (!ifp->if_afdata[AF_INET6]) 2016 continue; 2017 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2018 IN6_LINKMTU(ifp) > maxmtu) 2019 maxmtu = IN6_LINKMTU(ifp); 2020 } 2021 NET_EPOCH_EXIT(et); 2022 if (maxmtu) /* update only when maxmtu is positive */ 2023 V_in6_maxmtu = maxmtu; 2024 } 2025 2026 /* 2027 * Provide the length of interface identifiers to be used for the link attached 2028 * to the given interface. The length should be defined in "IPv6 over 2029 * xxx-link" document. Note that address architecture might also define 2030 * the length for a particular set of address prefixes, regardless of the 2031 * link type. As clarified in rfc2462bis, those two definitions should be 2032 * consistent, and those really are as of August 2004. 2033 */ 2034 int 2035 in6_if2idlen(struct ifnet *ifp) 2036 { 2037 switch (ifp->if_type) { 2038 case IFT_ETHER: /* RFC2464 */ 2039 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2040 case IFT_L2VLAN: /* ditto */ 2041 case IFT_BRIDGE: /* bridge(4) only does Ethernet-like links */ 2042 case IFT_INFINIBAND: 2043 return (64); 2044 case IFT_PPP: /* RFC2472 */ 2045 return (64); 2046 case IFT_FRELAY: /* RFC2590 */ 2047 return (64); 2048 case IFT_IEEE1394: /* RFC3146 */ 2049 return (64); 2050 case IFT_GIF: 2051 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2052 case IFT_LOOP: 2053 return (64); /* XXX: is this really correct? */ 2054 default: 2055 /* 2056 * Unknown link type: 2057 * It might be controversial to use the today's common constant 2058 * of 64 for these cases unconditionally. For full compliance, 2059 * we should return an error in this case. On the other hand, 2060 * if we simply miss the standard for the link type or a new 2061 * standard is defined for a new link type, the IFID length 2062 * is very likely to be the common constant. As a compromise, 2063 * we always use the constant, but make an explicit notice 2064 * indicating the "unknown" case. 2065 */ 2066 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2067 return (64); 2068 } 2069 } 2070 2071 struct in6_llentry { 2072 struct llentry base; 2073 }; 2074 2075 #define IN6_LLTBL_DEFAULT_HSIZE 32 2076 #define IN6_LLTBL_HASH(k, h) \ 2077 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2078 2079 /* 2080 * Do actual deallocation of @lle. 2081 */ 2082 static void 2083 in6_lltable_destroy_lle_unlocked(epoch_context_t ctx) 2084 { 2085 struct llentry *lle; 2086 2087 lle = __containerof(ctx, struct llentry, lle_epoch_ctx); 2088 LLE_LOCK_DESTROY(lle); 2089 LLE_REQ_DESTROY(lle); 2090 free(lle, M_LLTABLE); 2091 } 2092 2093 /* 2094 * Called by LLE_FREE_LOCKED when number of references 2095 * drops to zero. 2096 */ 2097 static void 2098 in6_lltable_destroy_lle(struct llentry *lle) 2099 { 2100 2101 LLE_WUNLOCK(lle); 2102 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2103 } 2104 2105 static struct llentry * 2106 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2107 { 2108 struct in6_llentry *lle; 2109 2110 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2111 if (lle == NULL) /* NB: caller generates msg */ 2112 return NULL; 2113 2114 lle->base.r_l3addr.addr6 = *addr6; 2115 lle->base.lle_refcnt = 1; 2116 lle->base.lle_free = in6_lltable_destroy_lle; 2117 LLE_LOCK_INIT(&lle->base); 2118 LLE_REQ_INIT(&lle->base); 2119 callout_init(&lle->base.lle_timer, 1); 2120 2121 return (&lle->base); 2122 } 2123 2124 static int 2125 in6_lltable_match_prefix(const struct sockaddr *saddr, 2126 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2127 { 2128 const struct in6_addr *addr, *mask, *lle_addr; 2129 2130 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2131 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2132 lle_addr = &lle->r_l3addr.addr6; 2133 2134 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2135 return (0); 2136 2137 if (lle->la_flags & LLE_IFADDR) { 2138 /* 2139 * Delete LLE_IFADDR records IFF address & flag matches. 2140 * Note that addr is the interface address within prefix 2141 * being matched. 2142 */ 2143 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2144 (flags & LLE_STATIC) != 0) 2145 return (1); 2146 return (0); 2147 } 2148 2149 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2150 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2151 return (1); 2152 2153 return (0); 2154 } 2155 2156 static void 2157 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2158 { 2159 struct ifnet *ifp; 2160 2161 LLE_WLOCK_ASSERT(lle); 2162 KASSERT(llt != NULL, ("lltable is NULL")); 2163 2164 /* Unlink entry from table */ 2165 if ((lle->la_flags & LLE_LINKED) != 0) { 2166 ifp = llt->llt_ifp; 2167 IF_AFDATA_WLOCK_ASSERT(ifp); 2168 lltable_unlink_entry(llt, lle); 2169 } 2170 2171 llentry_free(lle); 2172 } 2173 2174 static int 2175 in6_lltable_rtcheck(struct ifnet *ifp, 2176 u_int flags, 2177 const struct sockaddr *l3addr) 2178 { 2179 const struct sockaddr_in6 *sin6; 2180 struct nhop_object *nh; 2181 struct in6_addr dst; 2182 uint32_t scopeid; 2183 char ip6buf[INET6_ADDRSTRLEN]; 2184 int fibnum; 2185 2186 NET_EPOCH_ASSERT(); 2187 KASSERT(l3addr->sa_family == AF_INET6, 2188 ("sin_family %d", l3addr->sa_family)); 2189 2190 sin6 = (const struct sockaddr_in6 *)l3addr; 2191 in6_splitscope(&sin6->sin6_addr, &dst, &scopeid); 2192 fibnum = V_rt_add_addr_allfibs ? RT_DEFAULT_FIB : ifp->if_fib; 2193 nh = fib6_lookup(fibnum, &dst, scopeid, NHR_NONE, 0); 2194 if (nh && ((nh->nh_flags & NHF_GATEWAY) || nh->nh_ifp != ifp)) { 2195 struct ifaddr *ifa; 2196 /* 2197 * Create an ND6 cache for an IPv6 neighbor 2198 * that is not covered by our own prefix. 2199 */ 2200 ifa = ifaof_ifpforaddr(l3addr, ifp); 2201 if (ifa != NULL) { 2202 return 0; 2203 } 2204 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2205 ip6_sprintf(ip6buf, &sin6->sin6_addr)); 2206 return EINVAL; 2207 } 2208 return 0; 2209 } 2210 2211 /* 2212 * Called by the datapath to indicate that the entry was used. 2213 */ 2214 static void 2215 in6_lltable_mark_used(struct llentry *lle) 2216 { 2217 2218 LLE_REQ_LOCK(lle); 2219 lle->r_skip_req = 0; 2220 2221 /* 2222 * Set the hit time so the callback function 2223 * can determine the remaining time before 2224 * transiting to the DELAY state. 2225 */ 2226 lle->lle_hittime = time_uptime; 2227 LLE_REQ_UNLOCK(lle); 2228 } 2229 2230 static inline uint32_t 2231 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2232 { 2233 2234 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2235 } 2236 2237 static uint32_t 2238 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2239 { 2240 2241 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2242 } 2243 2244 static void 2245 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2246 { 2247 struct sockaddr_in6 *sin6; 2248 2249 sin6 = (struct sockaddr_in6 *)sa; 2250 bzero(sin6, sizeof(*sin6)); 2251 sin6->sin6_family = AF_INET6; 2252 sin6->sin6_len = sizeof(*sin6); 2253 sin6->sin6_addr = lle->r_l3addr.addr6; 2254 } 2255 2256 static inline struct llentry * 2257 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2258 { 2259 struct llentry *lle; 2260 struct llentries *lleh; 2261 u_int hashidx; 2262 2263 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2264 lleh = &llt->lle_head[hashidx]; 2265 CK_LIST_FOREACH(lle, lleh, lle_next) { 2266 if (lle->la_flags & LLE_DELETED) 2267 continue; 2268 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2269 break; 2270 } 2271 2272 return (lle); 2273 } 2274 2275 static void 2276 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2277 { 2278 2279 lle->la_flags |= LLE_DELETED; 2280 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2281 #ifdef DIAGNOSTIC 2282 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2283 #endif 2284 llentry_free(lle); 2285 } 2286 2287 static struct llentry * 2288 in6_lltable_alloc(struct lltable *llt, u_int flags, 2289 const struct sockaddr *l3addr) 2290 { 2291 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2292 struct ifnet *ifp = llt->llt_ifp; 2293 struct llentry *lle; 2294 char linkhdr[LLE_MAX_LINKHDR]; 2295 size_t linkhdrsize; 2296 int lladdr_off; 2297 2298 KASSERT(l3addr->sa_family == AF_INET6, 2299 ("sin_family %d", l3addr->sa_family)); 2300 2301 /* 2302 * A route that covers the given address must have 2303 * been installed 1st because we are doing a resolution, 2304 * verify this. 2305 */ 2306 if (!(flags & LLE_IFADDR) && 2307 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2308 return (NULL); 2309 2310 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2311 if (lle == NULL) { 2312 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2313 return (NULL); 2314 } 2315 lle->la_flags = flags; 2316 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2317 linkhdrsize = LLE_MAX_LINKHDR; 2318 if (lltable_calc_llheader(ifp, AF_INET6, IF_LLADDR(ifp), 2319 linkhdr, &linkhdrsize, &lladdr_off) != 0) { 2320 NET_EPOCH_CALL(in6_lltable_destroy_lle_unlocked, &lle->lle_epoch_ctx); 2321 return (NULL); 2322 } 2323 lltable_set_entry_addr(ifp, lle, linkhdr, linkhdrsize, 2324 lladdr_off); 2325 lle->la_flags |= LLE_STATIC; 2326 } 2327 2328 if ((lle->la_flags & LLE_STATIC) != 0) 2329 lle->ln_state = ND6_LLINFO_REACHABLE; 2330 2331 return (lle); 2332 } 2333 2334 static struct llentry * 2335 in6_lltable_lookup(struct lltable *llt, u_int flags, 2336 const struct sockaddr *l3addr) 2337 { 2338 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2339 struct llentry *lle; 2340 2341 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2342 KASSERT(l3addr->sa_family == AF_INET6, 2343 ("sin_family %d", l3addr->sa_family)); 2344 KASSERT((flags & (LLE_UNLOCKED | LLE_EXCLUSIVE)) != 2345 (LLE_UNLOCKED | LLE_EXCLUSIVE), 2346 ("wrong lle request flags: %#x", flags)); 2347 2348 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2349 if (lle == NULL) 2350 return (NULL); 2351 if (flags & LLE_UNLOCKED) 2352 return (lle); 2353 2354 if (flags & LLE_EXCLUSIVE) 2355 LLE_WLOCK(lle); 2356 else 2357 LLE_RLOCK(lle); 2358 2359 /* 2360 * If the afdata lock is not held, the LLE may have been unlinked while 2361 * we were blocked on the LLE lock. Check for this case. 2362 */ 2363 if (__predict_false((lle->la_flags & LLE_LINKED) == 0)) { 2364 if (flags & LLE_EXCLUSIVE) 2365 LLE_WUNLOCK(lle); 2366 else 2367 LLE_RUNLOCK(lle); 2368 return (NULL); 2369 } 2370 return (lle); 2371 } 2372 2373 static int 2374 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2375 struct sysctl_req *wr) 2376 { 2377 struct ifnet *ifp = llt->llt_ifp; 2378 /* XXX stack use */ 2379 struct { 2380 struct rt_msghdr rtm; 2381 struct sockaddr_in6 sin6; 2382 /* 2383 * ndp.c assumes that sdl is word aligned 2384 */ 2385 #ifdef __LP64__ 2386 uint32_t pad; 2387 #endif 2388 struct sockaddr_dl sdl; 2389 } ndpc; 2390 struct sockaddr_dl *sdl; 2391 int error; 2392 2393 bzero(&ndpc, sizeof(ndpc)); 2394 /* skip deleted entries */ 2395 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2396 return (0); 2397 /* Skip if jailed and not a valid IP of the prison. */ 2398 lltable_fill_sa_entry(lle, (struct sockaddr *)&ndpc.sin6); 2399 if (prison_if(wr->td->td_ucred, (struct sockaddr *)&ndpc.sin6) != 0) 2400 return (0); 2401 /* 2402 * produce a msg made of: 2403 * struct rt_msghdr; 2404 * struct sockaddr_in6 (IPv6) 2405 * struct sockaddr_dl; 2406 */ 2407 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2408 ndpc.rtm.rtm_version = RTM_VERSION; 2409 ndpc.rtm.rtm_type = RTM_GET; 2410 ndpc.rtm.rtm_flags = RTF_UP; 2411 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2412 sa6_recoverscope(&ndpc.sin6); 2413 2414 /* publish */ 2415 if (lle->la_flags & LLE_PUB) 2416 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2417 2418 sdl = &ndpc.sdl; 2419 sdl->sdl_family = AF_LINK; 2420 sdl->sdl_len = sizeof(*sdl); 2421 sdl->sdl_index = ifp->if_index; 2422 sdl->sdl_type = ifp->if_type; 2423 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 2424 sdl->sdl_alen = ifp->if_addrlen; 2425 bcopy(lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2426 } else { 2427 sdl->sdl_alen = 0; 2428 bzero(LLADDR(sdl), ifp->if_addrlen); 2429 } 2430 if (lle->la_expire != 0) 2431 ndpc.rtm.rtm_rmx.rmx_expire = lle->la_expire + 2432 lle->lle_remtime / hz + time_second - time_uptime; 2433 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2434 if (lle->la_flags & LLE_STATIC) 2435 ndpc.rtm.rtm_flags |= RTF_STATIC; 2436 if (lle->la_flags & LLE_IFADDR) 2437 ndpc.rtm.rtm_flags |= RTF_PINNED; 2438 if (lle->ln_router != 0) 2439 ndpc.rtm.rtm_flags |= RTF_GATEWAY; 2440 ndpc.rtm.rtm_rmx.rmx_pksent = lle->la_asked; 2441 /* Store state in rmx_weight value */ 2442 ndpc.rtm.rtm_rmx.rmx_state = lle->ln_state; 2443 ndpc.rtm.rtm_index = ifp->if_index; 2444 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2445 2446 return (error); 2447 } 2448 2449 static struct lltable * 2450 in6_lltattach(struct ifnet *ifp) 2451 { 2452 struct lltable *llt; 2453 2454 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2455 llt->llt_af = AF_INET6; 2456 llt->llt_ifp = ifp; 2457 2458 llt->llt_lookup = in6_lltable_lookup; 2459 llt->llt_alloc_entry = in6_lltable_alloc; 2460 llt->llt_delete_entry = in6_lltable_delete_entry; 2461 llt->llt_dump_entry = in6_lltable_dump_entry; 2462 llt->llt_hash = in6_lltable_hash; 2463 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2464 llt->llt_free_entry = in6_lltable_free_entry; 2465 llt->llt_match_prefix = in6_lltable_match_prefix; 2466 llt->llt_mark_used = in6_lltable_mark_used; 2467 lltable_link(llt); 2468 2469 return (llt); 2470 } 2471 2472 void * 2473 in6_domifattach(struct ifnet *ifp) 2474 { 2475 struct in6_ifextra *ext; 2476 2477 /* There are not IPv6-capable interfaces. */ 2478 switch (ifp->if_type) { 2479 case IFT_PFLOG: 2480 case IFT_PFSYNC: 2481 case IFT_USB: 2482 return (NULL); 2483 } 2484 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2485 bzero(ext, sizeof(*ext)); 2486 2487 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2488 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2489 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2490 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2491 2492 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2493 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2494 M_WAITOK); 2495 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2496 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2497 2498 ext->nd_ifinfo = nd6_ifattach(ifp); 2499 ext->scope6_id = scope6_ifattach(ifp); 2500 ext->lltable = in6_lltattach(ifp); 2501 2502 ext->mld_ifinfo = mld_domifattach(ifp); 2503 2504 return ext; 2505 } 2506 2507 int 2508 in6_domifmtu(struct ifnet *ifp) 2509 { 2510 if (ifp->if_afdata[AF_INET6] == NULL) 2511 return ifp->if_mtu; 2512 2513 return (IN6_LINKMTU(ifp)); 2514 } 2515 2516 void 2517 in6_domifdetach(struct ifnet *ifp, void *aux) 2518 { 2519 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2520 2521 mld_domifdetach(ifp); 2522 scope6_ifdetach(ext->scope6_id); 2523 nd6_ifdetach(ifp, ext->nd_ifinfo); 2524 lltable_free(ext->lltable); 2525 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2526 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2527 free(ext->in6_ifstat, M_IFADDR); 2528 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2529 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2530 free(ext->icmp6_ifstat, M_IFADDR); 2531 free(ext, M_IFADDR); 2532 } 2533 2534 /* 2535 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2536 * v4 mapped addr or v4 compat addr 2537 */ 2538 void 2539 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2540 { 2541 2542 bzero(sin, sizeof(*sin)); 2543 sin->sin_len = sizeof(struct sockaddr_in); 2544 sin->sin_family = AF_INET; 2545 sin->sin_port = sin6->sin6_port; 2546 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2547 } 2548 2549 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2550 void 2551 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2552 { 2553 bzero(sin6, sizeof(*sin6)); 2554 sin6->sin6_len = sizeof(struct sockaddr_in6); 2555 sin6->sin6_family = AF_INET6; 2556 sin6->sin6_port = sin->sin_port; 2557 sin6->sin6_addr.s6_addr32[0] = 0; 2558 sin6->sin6_addr.s6_addr32[1] = 0; 2559 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2560 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2561 } 2562 2563 /* Convert sockaddr_in6 into sockaddr_in. */ 2564 void 2565 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2566 { 2567 struct sockaddr_in *sin_p; 2568 struct sockaddr_in6 sin6; 2569 2570 /* 2571 * Save original sockaddr_in6 addr and convert it 2572 * to sockaddr_in. 2573 */ 2574 sin6 = *(struct sockaddr_in6 *)nam; 2575 sin_p = (struct sockaddr_in *)nam; 2576 in6_sin6_2_sin(sin_p, &sin6); 2577 } 2578 2579 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2580 void 2581 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2582 { 2583 struct sockaddr_in *sin_p; 2584 struct sockaddr_in6 *sin6_p; 2585 2586 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2587 sin_p = (struct sockaddr_in *)*nam; 2588 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2589 free(*nam, M_SONAME); 2590 *nam = (struct sockaddr *)sin6_p; 2591 } 2592