1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in.c 8.2 (Berkeley) 11/15/93 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include "opt_compat.h" 67 #include "opt_inet.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/eventhandler.h> 72 #include <sys/errno.h> 73 #include <sys/jail.h> 74 #include <sys/malloc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/sockio.h> 78 #include <sys/systm.h> 79 #include <sys/priv.h> 80 #include <sys/proc.h> 81 #include <sys/time.h> 82 #include <sys/kernel.h> 83 #include <sys/syslog.h> 84 85 #include <net/if.h> 86 #include <net/if_var.h> 87 #include <net/if_types.h> 88 #include <net/route.h> 89 #include <net/if_dl.h> 90 #include <net/vnet.h> 91 92 #include <netinet/in.h> 93 #include <netinet/in_var.h> 94 #include <net/if_llatbl.h> 95 #include <netinet/if_ether.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet/ip_carp.h> 100 101 #include <netinet/ip6.h> 102 #include <netinet6/ip6_var.h> 103 #include <netinet6/nd6.h> 104 #include <netinet6/mld6_var.h> 105 #include <netinet6/ip6_mroute.h> 106 #include <netinet6/in6_ifattach.h> 107 #include <netinet6/scope6_var.h> 108 #include <netinet6/in6_pcb.h> 109 110 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 111 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 112 113 /* 114 * Definitions of some costant IP6 addresses. 115 */ 116 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 117 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 118 const struct in6_addr in6addr_nodelocal_allnodes = 119 IN6ADDR_NODELOCAL_ALLNODES_INIT; 120 const struct in6_addr in6addr_linklocal_allnodes = 121 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 122 const struct in6_addr in6addr_linklocal_allrouters = 123 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 124 const struct in6_addr in6addr_linklocal_allv2routers = 125 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 126 127 const struct in6_addr in6mask0 = IN6MASK0; 128 const struct in6_addr in6mask32 = IN6MASK32; 129 const struct in6_addr in6mask64 = IN6MASK64; 130 const struct in6_addr in6mask96 = IN6MASK96; 131 const struct in6_addr in6mask128 = IN6MASK128; 132 133 const struct sockaddr_in6 sa6_any = 134 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 135 136 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 137 struct in6_aliasreq *, int); 138 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 139 140 int (*faithprefix_p)(struct in6_addr *); 141 142 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 143 struct in6_ifaddr *, int); 144 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 145 struct in6_aliasreq *, int flags); 146 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 147 struct in6_ifaddr *, int, int); 148 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 149 struct in6_ifaddr *, int); 150 151 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 152 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 153 154 155 void 156 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 157 { 158 struct sockaddr_dl gateway; 159 struct sockaddr_in6 mask, addr; 160 struct rtentry rt; 161 162 /* 163 * initialize for rtmsg generation 164 */ 165 bzero(&gateway, sizeof(gateway)); 166 gateway.sdl_len = sizeof(gateway); 167 gateway.sdl_family = AF_LINK; 168 169 bzero(&rt, sizeof(rt)); 170 rt.rt_gateway = (struct sockaddr *)&gateway; 171 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 172 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 173 rt_mask(&rt) = (struct sockaddr *)&mask; 174 rt_key(&rt) = (struct sockaddr *)&addr; 175 rt.rt_flags = RTF_HOST | RTF_STATIC; 176 if (cmd == RTM_ADD) 177 rt.rt_flags |= RTF_UP; 178 /* Announce arrival of local address to all FIBs. */ 179 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt); 180 } 181 182 int 183 in6_mask2len(struct in6_addr *mask, u_char *lim0) 184 { 185 int x = 0, y; 186 u_char *lim = lim0, *p; 187 188 /* ignore the scope_id part */ 189 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 190 lim = (u_char *)mask + sizeof(*mask); 191 for (p = (u_char *)mask; p < lim; x++, p++) { 192 if (*p != 0xff) 193 break; 194 } 195 y = 0; 196 if (p < lim) { 197 for (y = 0; y < 8; y++) { 198 if ((*p & (0x80 >> y)) == 0) 199 break; 200 } 201 } 202 203 /* 204 * when the limit pointer is given, do a stricter check on the 205 * remaining bits. 206 */ 207 if (p < lim) { 208 if (y != 0 && (*p & (0x00ff >> y)) != 0) 209 return (-1); 210 for (p = p + 1; p < lim; p++) 211 if (*p != 0) 212 return (-1); 213 } 214 215 return x * 8 + y; 216 } 217 218 #ifdef COMPAT_FREEBSD32 219 struct in6_ndifreq32 { 220 char ifname[IFNAMSIZ]; 221 uint32_t ifindex; 222 }; 223 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 224 #endif 225 226 int 227 in6_control(struct socket *so, u_long cmd, caddr_t data, 228 struct ifnet *ifp, struct thread *td) 229 { 230 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 231 struct in6_ifaddr *ia = NULL; 232 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 233 struct sockaddr_in6 *sa6; 234 int carp_attached = 0; 235 int error; 236 u_long ocmd = cmd; 237 238 /* 239 * Compat to make pre-10.x ifconfig(8) operable. 240 */ 241 if (cmd == OSIOCAIFADDR_IN6) 242 cmd = SIOCAIFADDR_IN6; 243 244 switch (cmd) { 245 case SIOCGETSGCNT_IN6: 246 case SIOCGETMIFCNT_IN6: 247 /* 248 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 249 * We cannot see how that would be needed, so do not adjust the 250 * KPI blindly; more likely should clean up the IPv4 variant. 251 */ 252 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 253 } 254 255 switch (cmd) { 256 case SIOCAADDRCTL_POLICY: 257 case SIOCDADDRCTL_POLICY: 258 if (td != NULL) { 259 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 260 if (error) 261 return (error); 262 } 263 return (in6_src_ioctl(cmd, data)); 264 } 265 266 if (ifp == NULL) 267 return (EOPNOTSUPP); 268 269 switch (cmd) { 270 case SIOCSNDFLUSH_IN6: 271 case SIOCSPFXFLUSH_IN6: 272 case SIOCSRTRFLUSH_IN6: 273 case SIOCSDEFIFACE_IN6: 274 case SIOCSIFINFO_FLAGS: 275 case SIOCSIFINFO_IN6: 276 if (td != NULL) { 277 error = priv_check(td, PRIV_NETINET_ND6); 278 if (error) 279 return (error); 280 } 281 /* FALLTHROUGH */ 282 case OSIOCGIFINFO_IN6: 283 case SIOCGIFINFO_IN6: 284 case SIOCGDRLST_IN6: 285 case SIOCGPRLST_IN6: 286 case SIOCGNBRINFO_IN6: 287 case SIOCGDEFIFACE_IN6: 288 return (nd6_ioctl(cmd, data, ifp)); 289 290 #ifdef COMPAT_FREEBSD32 291 case SIOCGDEFIFACE32_IN6: 292 { 293 struct in6_ndifreq ndif; 294 struct in6_ndifreq32 *ndif32; 295 296 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 297 ifp); 298 if (error) 299 return (error); 300 ndif32 = (struct in6_ndifreq32 *)data; 301 ndif32->ifindex = ndif.ifindex; 302 return (0); 303 } 304 #endif 305 } 306 307 switch (cmd) { 308 case SIOCSIFPREFIX_IN6: 309 case SIOCDIFPREFIX_IN6: 310 case SIOCAIFPREFIX_IN6: 311 case SIOCCIFPREFIX_IN6: 312 case SIOCSGIFPREFIX_IN6: 313 case SIOCGIFPREFIX_IN6: 314 log(LOG_NOTICE, 315 "prefix ioctls are now invalidated. " 316 "please use ifconfig.\n"); 317 return (EOPNOTSUPP); 318 } 319 320 switch (cmd) { 321 case SIOCSSCOPE6: 322 if (td != NULL) { 323 error = priv_check(td, PRIV_NETINET_SCOPE6); 324 if (error) 325 return (error); 326 } 327 /* FALLTHROUGH */ 328 case SIOCGSCOPE6: 329 case SIOCGSCOPE6DEF: 330 return (scope6_ioctl(cmd, data, ifp)); 331 } 332 333 /* 334 * Find address for this interface, if it exists. 335 * 336 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 337 * only, and used the first interface address as the target of other 338 * operations (without checking ifra_addr). This was because netinet 339 * code/API assumed at most 1 interface address per interface. 340 * Since IPv6 allows a node to assign multiple addresses 341 * on a single interface, we almost always look and check the 342 * presence of ifra_addr, and reject invalid ones here. 343 * It also decreases duplicated code among SIOC*_IN6 operations. 344 */ 345 switch (cmd) { 346 case SIOCAIFADDR_IN6: 347 case SIOCSIFPHYADDR_IN6: 348 sa6 = &ifra->ifra_addr; 349 break; 350 case SIOCSIFADDR_IN6: 351 case SIOCGIFADDR_IN6: 352 case SIOCSIFDSTADDR_IN6: 353 case SIOCSIFNETMASK_IN6: 354 case SIOCGIFDSTADDR_IN6: 355 case SIOCGIFNETMASK_IN6: 356 case SIOCDIFADDR_IN6: 357 case SIOCGIFPSRCADDR_IN6: 358 case SIOCGIFPDSTADDR_IN6: 359 case SIOCGIFAFLAG_IN6: 360 case SIOCSNDFLUSH_IN6: 361 case SIOCSPFXFLUSH_IN6: 362 case SIOCSRTRFLUSH_IN6: 363 case SIOCGIFALIFETIME_IN6: 364 case SIOCSIFALIFETIME_IN6: 365 case SIOCGIFSTAT_IN6: 366 case SIOCGIFSTAT_ICMP6: 367 sa6 = &ifr->ifr_addr; 368 break; 369 case SIOCSIFADDR: 370 case SIOCSIFBRDADDR: 371 case SIOCSIFDSTADDR: 372 case SIOCSIFNETMASK: 373 /* 374 * Although we should pass any non-INET6 ioctl requests 375 * down to driver, we filter some legacy INET requests. 376 * Drivers trust SIOCSIFADDR et al to come from an already 377 * privileged layer, and do not perform any credentials 378 * checks or input validation. 379 */ 380 return (EINVAL); 381 default: 382 sa6 = NULL; 383 break; 384 } 385 if (sa6 && sa6->sin6_family == AF_INET6) { 386 if (sa6->sin6_scope_id != 0) 387 error = sa6_embedscope(sa6, 0); 388 else 389 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 390 if (error != 0) 391 return (error); 392 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 393 &sa6->sin6_addr)) != 0) 394 return (error); 395 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 396 } else 397 ia = NULL; 398 399 switch (cmd) { 400 case SIOCSIFADDR_IN6: 401 case SIOCSIFDSTADDR_IN6: 402 case SIOCSIFNETMASK_IN6: 403 /* 404 * Since IPv6 allows a node to assign multiple addresses 405 * on a single interface, SIOCSIFxxx ioctls are deprecated. 406 */ 407 /* we decided to obsolete this command (20000704) */ 408 error = EINVAL; 409 goto out; 410 411 case SIOCDIFADDR_IN6: 412 /* 413 * for IPv4, we look for existing in_ifaddr here to allow 414 * "ifconfig if0 delete" to remove the first IPv4 address on 415 * the interface. For IPv6, as the spec allows multiple 416 * interface address from the day one, we consider "remove the 417 * first one" semantics to be not preferable. 418 */ 419 if (ia == NULL) { 420 error = EADDRNOTAVAIL; 421 goto out; 422 } 423 /* FALLTHROUGH */ 424 case SIOCAIFADDR_IN6: 425 /* 426 * We always require users to specify a valid IPv6 address for 427 * the corresponding operation. 428 */ 429 if (ifra->ifra_addr.sin6_family != AF_INET6 || 430 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 431 error = EAFNOSUPPORT; 432 goto out; 433 } 434 435 if (td != NULL) { 436 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 437 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 438 if (error) 439 goto out; 440 } 441 /* FALLTHROUGH */ 442 case SIOCGIFSTAT_IN6: 443 case SIOCGIFSTAT_ICMP6: 444 if (ifp->if_afdata[AF_INET6] == NULL) { 445 error = EPFNOSUPPORT; 446 goto out; 447 } 448 break; 449 450 case SIOCGIFADDR_IN6: 451 /* This interface is basically deprecated. use SIOCGIFCONF. */ 452 /* FALLTHROUGH */ 453 case SIOCGIFAFLAG_IN6: 454 case SIOCGIFNETMASK_IN6: 455 case SIOCGIFDSTADDR_IN6: 456 case SIOCGIFALIFETIME_IN6: 457 /* must think again about its semantics */ 458 if (ia == NULL) { 459 error = EADDRNOTAVAIL; 460 goto out; 461 } 462 break; 463 464 case SIOCSIFALIFETIME_IN6: 465 { 466 struct in6_addrlifetime *lt; 467 468 if (td != NULL) { 469 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 470 if (error) 471 goto out; 472 } 473 if (ia == NULL) { 474 error = EADDRNOTAVAIL; 475 goto out; 476 } 477 /* sanity for overflow - beware unsigned */ 478 lt = &ifr->ifr_ifru.ifru_lifetime; 479 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 480 lt->ia6t_vltime + time_uptime < time_uptime) { 481 error = EINVAL; 482 goto out; 483 } 484 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 485 lt->ia6t_pltime + time_uptime < time_uptime) { 486 error = EINVAL; 487 goto out; 488 } 489 break; 490 } 491 } 492 493 switch (cmd) { 494 case SIOCGIFADDR_IN6: 495 ifr->ifr_addr = ia->ia_addr; 496 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 497 goto out; 498 break; 499 500 case SIOCGIFDSTADDR_IN6: 501 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 502 error = EINVAL; 503 goto out; 504 } 505 /* 506 * XXX: should we check if ifa_dstaddr is NULL and return 507 * an error? 508 */ 509 ifr->ifr_dstaddr = ia->ia_dstaddr; 510 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 511 goto out; 512 break; 513 514 case SIOCGIFNETMASK_IN6: 515 ifr->ifr_addr = ia->ia_prefixmask; 516 break; 517 518 case SIOCGIFAFLAG_IN6: 519 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 520 break; 521 522 case SIOCGIFSTAT_IN6: 523 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 524 ifp->if_afdata[AF_INET6])->in6_ifstat, 525 &ifr->ifr_ifru.ifru_stat, 526 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 527 break; 528 529 case SIOCGIFSTAT_ICMP6: 530 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 531 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 532 &ifr->ifr_ifru.ifru_icmp6stat, 533 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 534 break; 535 536 case SIOCGIFALIFETIME_IN6: 537 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 538 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 539 time_t maxexpire; 540 struct in6_addrlifetime *retlt = 541 &ifr->ifr_ifru.ifru_lifetime; 542 543 /* 544 * XXX: adjust expiration time assuming time_t is 545 * signed. 546 */ 547 maxexpire = (-1) & 548 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 549 if (ia->ia6_lifetime.ia6t_vltime < 550 maxexpire - ia->ia6_updatetime) { 551 retlt->ia6t_expire = ia->ia6_updatetime + 552 ia->ia6_lifetime.ia6t_vltime; 553 } else 554 retlt->ia6t_expire = maxexpire; 555 } 556 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 557 time_t maxexpire; 558 struct in6_addrlifetime *retlt = 559 &ifr->ifr_ifru.ifru_lifetime; 560 561 /* 562 * XXX: adjust expiration time assuming time_t is 563 * signed. 564 */ 565 maxexpire = (-1) & 566 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 567 if (ia->ia6_lifetime.ia6t_pltime < 568 maxexpire - ia->ia6_updatetime) { 569 retlt->ia6t_preferred = ia->ia6_updatetime + 570 ia->ia6_lifetime.ia6t_pltime; 571 } else 572 retlt->ia6t_preferred = maxexpire; 573 } 574 break; 575 576 case SIOCSIFALIFETIME_IN6: 577 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 578 /* for sanity */ 579 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 580 ia->ia6_lifetime.ia6t_expire = 581 time_uptime + ia->ia6_lifetime.ia6t_vltime; 582 } else 583 ia->ia6_lifetime.ia6t_expire = 0; 584 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 585 ia->ia6_lifetime.ia6t_preferred = 586 time_uptime + ia->ia6_lifetime.ia6t_pltime; 587 } else 588 ia->ia6_lifetime.ia6t_preferred = 0; 589 break; 590 591 case SIOCAIFADDR_IN6: 592 { 593 struct nd_prefixctl pr0; 594 struct nd_prefix *pr; 595 596 /* 597 * first, make or update the interface address structure, 598 * and link it to the list. 599 */ 600 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 601 goto out; 602 if (ia != NULL) 603 ifa_free(&ia->ia_ifa); 604 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 605 == NULL) { 606 /* 607 * this can happen when the user specify the 0 valid 608 * lifetime. 609 */ 610 break; 611 } 612 613 if (cmd == ocmd && ifra->ifra_vhid > 0) { 614 if (carp_attach_p != NULL) 615 error = (*carp_attach_p)(&ia->ia_ifa, 616 ifra->ifra_vhid); 617 else 618 error = EPROTONOSUPPORT; 619 if (error) 620 goto out; 621 else 622 carp_attached = 1; 623 } 624 625 /* 626 * then, make the prefix on-link on the interface. 627 * XXX: we'd rather create the prefix before the address, but 628 * we need at least one address to install the corresponding 629 * interface route, so we configure the address first. 630 */ 631 632 /* 633 * convert mask to prefix length (prefixmask has already 634 * been validated in in6_update_ifa(). 635 */ 636 bzero(&pr0, sizeof(pr0)); 637 pr0.ndpr_ifp = ifp; 638 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 639 NULL); 640 if (pr0.ndpr_plen == 128) { 641 break; /* we don't need to install a host route. */ 642 } 643 pr0.ndpr_prefix = ifra->ifra_addr; 644 /* apply the mask for safety. */ 645 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 646 &ifra->ifra_prefixmask.sin6_addr); 647 648 /* 649 * XXX: since we don't have an API to set prefix (not address) 650 * lifetimes, we just use the same lifetimes as addresses. 651 * The (temporarily) installed lifetimes can be overridden by 652 * later advertised RAs (when accept_rtadv is non 0), which is 653 * an intended behavior. 654 */ 655 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 656 pr0.ndpr_raf_auto = 657 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 658 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 659 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 660 661 /* add the prefix if not yet. */ 662 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 663 /* 664 * nd6_prelist_add will install the corresponding 665 * interface route. 666 */ 667 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 668 if (carp_attached) 669 (*carp_detach_p)(&ia->ia_ifa); 670 goto out; 671 } 672 if (pr == NULL) { 673 if (carp_attached) 674 (*carp_detach_p)(&ia->ia_ifa); 675 log(LOG_ERR, "nd6_prelist_add succeeded but " 676 "no prefix\n"); 677 error = EINVAL; 678 goto out; 679 } 680 } 681 682 /* relate the address to the prefix */ 683 if (ia->ia6_ndpr == NULL) { 684 ia->ia6_ndpr = pr; 685 pr->ndpr_refcnt++; 686 687 /* 688 * If this is the first autoconf address from the 689 * prefix, create a temporary address as well 690 * (when required). 691 */ 692 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 693 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 694 int e; 695 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 696 log(LOG_NOTICE, "in6_control: failed " 697 "to create a temporary address, " 698 "errno=%d\n", e); 699 } 700 } 701 } 702 703 /* 704 * this might affect the status of autoconfigured addresses, 705 * that is, this address might make other addresses detached. 706 */ 707 pfxlist_onlink_check(); 708 if (error == 0 && ia) { 709 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 710 /* 711 * Try to clear the flag when a new 712 * IPv6 address is added onto an 713 * IFDISABLED interface and it 714 * succeeds. 715 */ 716 struct in6_ndireq nd; 717 718 memset(&nd, 0, sizeof(nd)); 719 nd.ndi.flags = ND_IFINFO(ifp)->flags; 720 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 721 if (nd6_ioctl(SIOCSIFINFO_FLAGS, 722 (caddr_t)&nd, ifp) < 0) 723 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 724 "SIOCSIFINFO_FLAGS for -ifdisabled " 725 "failed."); 726 /* 727 * Ignore failure of clearing the flag 728 * intentionally. The failure means 729 * address duplication was detected. 730 */ 731 } 732 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 733 } 734 break; 735 } 736 737 case SIOCDIFADDR_IN6: 738 { 739 struct nd_prefix *pr; 740 741 /* 742 * If the address being deleted is the only one that owns 743 * the corresponding prefix, expire the prefix as well. 744 * XXX: theoretically, we don't have to worry about such 745 * relationship, since we separate the address management 746 * and the prefix management. We do this, however, to provide 747 * as much backward compatibility as possible in terms of 748 * the ioctl operation. 749 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 750 */ 751 pr = ia->ia6_ndpr; 752 in6_purgeaddr(&ia->ia_ifa); 753 if (pr && pr->ndpr_refcnt == 0) 754 prelist_remove(pr); 755 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 756 break; 757 } 758 759 default: 760 if (ifp->if_ioctl == NULL) { 761 error = EOPNOTSUPP; 762 goto out; 763 } 764 error = (*ifp->if_ioctl)(ifp, cmd, data); 765 goto out; 766 } 767 768 error = 0; 769 out: 770 if (ia != NULL) 771 ifa_free(&ia->ia_ifa); 772 return (error); 773 } 774 775 776 /* 777 * Join necessary multicast groups. Factored out from in6_update_ifa(). 778 * This entire work should only be done once, for the default FIB. 779 */ 780 static int 781 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 782 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 783 { 784 char ip6buf[INET6_ADDRSTRLEN]; 785 struct sockaddr_in6 mltaddr, mltmask; 786 struct in6_addr llsol; 787 struct in6_multi_mship *imm; 788 struct rtentry *rt; 789 int delay, error; 790 791 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 792 793 /* Join solicited multicast addr for new host id. */ 794 bzero(&llsol, sizeof(struct in6_addr)); 795 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 796 llsol.s6_addr32[1] = 0; 797 llsol.s6_addr32[2] = htonl(1); 798 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 799 llsol.s6_addr8[12] = 0xff; 800 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 801 /* XXX: should not happen */ 802 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 803 goto cleanup; 804 } 805 delay = 0; 806 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 807 /* 808 * We need a random delay for DAD on the address being 809 * configured. It also means delaying transmission of the 810 * corresponding MLD report to avoid report collision. 811 * [RFC 4861, Section 6.3.7] 812 */ 813 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 814 } 815 imm = in6_joingroup(ifp, &llsol, &error, delay); 816 if (imm == NULL) { 817 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 818 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol), 819 if_name(ifp), error)); 820 goto cleanup; 821 } 822 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 823 *in6m_sol = imm->i6mm_maddr; 824 825 bzero(&mltmask, sizeof(mltmask)); 826 mltmask.sin6_len = sizeof(struct sockaddr_in6); 827 mltmask.sin6_family = AF_INET6; 828 mltmask.sin6_addr = in6mask32; 829 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 830 831 /* 832 * Join link-local all-nodes address. 833 */ 834 bzero(&mltaddr, sizeof(mltaddr)); 835 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 836 mltaddr.sin6_family = AF_INET6; 837 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 838 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 839 goto cleanup; /* XXX: should not fail */ 840 841 /* 842 * XXX: do we really need this automatic routes? We should probably 843 * reconsider this stuff. Most applications actually do not need the 844 * routes, since they usually specify the outgoing interface. 845 */ 846 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 847 if (rt != NULL) { 848 /* XXX: only works in !SCOPEDROUTING case. */ 849 if (memcmp(&mltaddr.sin6_addr, 850 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 851 MLTMASK_LEN)) { 852 RTFREE_LOCKED(rt); 853 rt = NULL; 854 } 855 } 856 if (rt == NULL) { 857 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 858 (struct sockaddr *)&ia->ia_addr, 859 (struct sockaddr *)&mltmask, RTF_UP, 860 (struct rtentry **)0, RT_DEFAULT_FIB); 861 if (error) 862 goto cleanup; 863 } else 864 RTFREE_LOCKED(rt); 865 866 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 867 if (imm == NULL) { 868 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 869 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 870 &mltaddr.sin6_addr), if_name(ifp), error)); 871 goto cleanup; 872 } 873 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 874 875 /* 876 * Join node information group address. 877 */ 878 delay = 0; 879 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 880 /* 881 * The spec does not say anything about delay for this group, 882 * but the same logic should apply. 883 */ 884 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 885 } 886 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 887 /* XXX jinmei */ 888 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 889 if (imm == NULL) 890 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 891 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 892 &mltaddr.sin6_addr), if_name(ifp), error)); 893 /* XXX not very fatal, go on... */ 894 else 895 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 896 } 897 if (V_icmp6_nodeinfo_oldmcprefix && 898 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 899 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 900 if (imm == NULL) 901 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 902 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 903 &mltaddr.sin6_addr), if_name(ifp), error)); 904 /* XXX not very fatal, go on... */ 905 else 906 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 907 } 908 909 /* 910 * Join interface-local all-nodes address. 911 * (ff01::1%ifN, and ff01::%ifN/32) 912 */ 913 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 914 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 915 goto cleanup; /* XXX: should not fail */ 916 /* XXX: again, do we really need the route? */ 917 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 918 if (rt != NULL) { 919 if (memcmp(&mltaddr.sin6_addr, 920 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 921 MLTMASK_LEN)) { 922 RTFREE_LOCKED(rt); 923 rt = NULL; 924 } 925 } 926 if (rt == NULL) { 927 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 928 (struct sockaddr *)&ia->ia_addr, 929 (struct sockaddr *)&mltmask, RTF_UP, 930 (struct rtentry **)0, RT_DEFAULT_FIB); 931 if (error) 932 goto cleanup; 933 } else 934 RTFREE_LOCKED(rt); 935 936 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 937 if (imm == NULL) { 938 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 939 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 940 &mltaddr.sin6_addr), if_name(ifp), error)); 941 goto cleanup; 942 } 943 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 944 #undef MLTMASK_LEN 945 946 cleanup: 947 return (error); 948 } 949 950 /* 951 * Update parameters of an IPv6 interface address. 952 * If necessary, a new entry is created and linked into address chains. 953 * This function is separated from in6_control(). 954 */ 955 int 956 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 957 struct in6_ifaddr *ia, int flags) 958 { 959 int error, hostIsNew = 0; 960 961 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 962 return (error); 963 964 if (ia == NULL) { 965 hostIsNew = 1; 966 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 967 return (ENOBUFS); 968 } 969 970 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 971 if (error != 0) { 972 if (hostIsNew != 0) { 973 in6_unlink_ifa(ia, ifp); 974 ifa_free(&ia->ia_ifa); 975 } 976 return (error); 977 } 978 979 if (hostIsNew) 980 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 981 982 return (error); 983 } 984 985 /* 986 * Fill in basic IPv6 address request info. 987 */ 988 void 989 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 990 const struct in6_addr *mask) 991 { 992 993 memset(ifra, 0, sizeof(struct in6_aliasreq)); 994 995 ifra->ifra_addr.sin6_family = AF_INET6; 996 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 997 if (addr != NULL) 998 ifra->ifra_addr.sin6_addr = *addr; 999 1000 ifra->ifra_prefixmask.sin6_family = AF_INET6; 1001 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1002 if (mask != NULL) 1003 ifra->ifra_prefixmask.sin6_addr = *mask; 1004 } 1005 1006 static int 1007 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 1008 struct in6_ifaddr *ia, int flags) 1009 { 1010 int plen = -1; 1011 struct sockaddr_in6 dst6; 1012 struct in6_addrlifetime *lt; 1013 char ip6buf[INET6_ADDRSTRLEN]; 1014 1015 /* Validate parameters */ 1016 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 1017 return (EINVAL); 1018 1019 /* 1020 * The destination address for a p2p link must have a family 1021 * of AF_UNSPEC or AF_INET6. 1022 */ 1023 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 1024 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 1025 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 1026 return (EAFNOSUPPORT); 1027 1028 /* 1029 * Validate address 1030 */ 1031 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 1032 ifra->ifra_addr.sin6_family != AF_INET6) 1033 return (EINVAL); 1034 1035 /* 1036 * validate ifra_prefixmask. don't check sin6_family, netmask 1037 * does not carry fields other than sin6_len. 1038 */ 1039 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 1040 return (EINVAL); 1041 /* 1042 * Because the IPv6 address architecture is classless, we require 1043 * users to specify a (non 0) prefix length (mask) for a new address. 1044 * We also require the prefix (when specified) mask is valid, and thus 1045 * reject a non-consecutive mask. 1046 */ 1047 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 1048 return (EINVAL); 1049 if (ifra->ifra_prefixmask.sin6_len != 0) { 1050 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 1051 (u_char *)&ifra->ifra_prefixmask + 1052 ifra->ifra_prefixmask.sin6_len); 1053 if (plen <= 0) 1054 return (EINVAL); 1055 } else { 1056 /* 1057 * In this case, ia must not be NULL. We just use its prefix 1058 * length. 1059 */ 1060 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1061 } 1062 /* 1063 * If the destination address on a p2p interface is specified, 1064 * and the address is a scoped one, validate/set the scope 1065 * zone identifier. 1066 */ 1067 dst6 = ifra->ifra_dstaddr; 1068 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1069 (dst6.sin6_family == AF_INET6)) { 1070 struct in6_addr in6_tmp; 1071 u_int32_t zoneid; 1072 1073 in6_tmp = dst6.sin6_addr; 1074 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1075 return (EINVAL); /* XXX: should be impossible */ 1076 1077 if (dst6.sin6_scope_id != 0) { 1078 if (dst6.sin6_scope_id != zoneid) 1079 return (EINVAL); 1080 } else /* user omit to specify the ID. */ 1081 dst6.sin6_scope_id = zoneid; 1082 1083 /* convert into the internal form */ 1084 if (sa6_embedscope(&dst6, 0)) 1085 return (EINVAL); /* XXX: should be impossible */ 1086 } 1087 /* Modify original ifra_dstaddr to reflect changes */ 1088 ifra->ifra_dstaddr = dst6; 1089 1090 /* 1091 * The destination address can be specified only for a p2p or a 1092 * loopback interface. If specified, the corresponding prefix length 1093 * must be 128. 1094 */ 1095 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1096 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1097 /* XXX: noisy message */ 1098 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1099 "be specified for a p2p or a loopback IF only\n")); 1100 return (EINVAL); 1101 } 1102 if (plen != 128) { 1103 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1104 "be 128 when dstaddr is specified\n")); 1105 return (EINVAL); 1106 } 1107 } 1108 /* lifetime consistency check */ 1109 lt = &ifra->ifra_lifetime; 1110 if (lt->ia6t_pltime > lt->ia6t_vltime) 1111 return (EINVAL); 1112 if (lt->ia6t_vltime == 0) { 1113 /* 1114 * the following log might be noisy, but this is a typical 1115 * configuration mistake or a tool's bug. 1116 */ 1117 nd6log((LOG_INFO, 1118 "in6_update_ifa: valid lifetime is 0 for %s\n", 1119 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1120 1121 if (ia == NULL) 1122 return (0); /* there's nothing to do */ 1123 } 1124 1125 /* Check prefix mask */ 1126 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1127 /* 1128 * We prohibit changing the prefix length of an existing 1129 * address, because 1130 * + such an operation should be rare in IPv6, and 1131 * + the operation would confuse prefix management. 1132 */ 1133 if (ia->ia_prefixmask.sin6_len != 0 && 1134 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1135 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1136 "of an existing %s address should not be changed\n", 1137 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1138 1139 return (EINVAL); 1140 } 1141 } 1142 1143 return (0); 1144 } 1145 1146 1147 /* 1148 * Allocate a new ifaddr and link it into chains. 1149 */ 1150 static struct in6_ifaddr * 1151 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1152 { 1153 struct in6_ifaddr *ia; 1154 1155 /* 1156 * When in6_alloc_ifa() is called in a process of a received 1157 * RA, it is called under an interrupt context. So, we should 1158 * call malloc with M_NOWAIT. 1159 */ 1160 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1161 if (ia == NULL) 1162 return (NULL); 1163 LIST_INIT(&ia->ia6_memberships); 1164 /* Initialize the address and masks, and put time stamp */ 1165 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1166 ia->ia_addr.sin6_family = AF_INET6; 1167 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1168 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1169 ia->ia_addr = ifra->ifra_addr; 1170 ia->ia6_createtime = time_uptime; 1171 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1172 /* 1173 * Some functions expect that ifa_dstaddr is not 1174 * NULL for p2p interfaces. 1175 */ 1176 ia->ia_ifa.ifa_dstaddr = 1177 (struct sockaddr *)&ia->ia_dstaddr; 1178 } else { 1179 ia->ia_ifa.ifa_dstaddr = NULL; 1180 } 1181 1182 /* set prefix mask if any */ 1183 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1184 if (ifra->ifra_prefixmask.sin6_len != 0) { 1185 ia->ia_prefixmask.sin6_family = AF_INET6; 1186 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1187 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1188 } 1189 1190 ia->ia_ifp = ifp; 1191 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1192 IF_ADDR_WLOCK(ifp); 1193 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1194 IF_ADDR_WUNLOCK(ifp); 1195 1196 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1197 IN6_IFADDR_WLOCK(); 1198 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1199 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1200 IN6_IFADDR_WUNLOCK(); 1201 1202 return (ia); 1203 } 1204 1205 /* 1206 * Update/configure interface address parameters: 1207 * 1208 * 1) Update lifetime 1209 * 2) Update interface metric ad flags 1210 * 3) Notify other subsystems 1211 */ 1212 static int 1213 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1214 struct in6_ifaddr *ia, int hostIsNew, int flags) 1215 { 1216 int error; 1217 1218 /* update timestamp */ 1219 ia->ia6_updatetime = time_uptime; 1220 1221 /* 1222 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1223 * to see if the address is deprecated or invalidated, but initialize 1224 * these members for applications. 1225 */ 1226 ia->ia6_lifetime = ifra->ifra_lifetime; 1227 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1228 ia->ia6_lifetime.ia6t_expire = 1229 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1230 } else 1231 ia->ia6_lifetime.ia6t_expire = 0; 1232 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1233 ia->ia6_lifetime.ia6t_preferred = 1234 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1235 } else 1236 ia->ia6_lifetime.ia6t_preferred = 0; 1237 1238 /* 1239 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1240 * userland, make it deprecated. 1241 */ 1242 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1243 ia->ia6_lifetime.ia6t_pltime = 0; 1244 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1245 } 1246 1247 /* 1248 * configure address flags. 1249 */ 1250 ia->ia6_flags = ifra->ifra_flags; 1251 1252 /* 1253 * Make the address tentative before joining multicast addresses, 1254 * so that corresponding MLD responses would not have a tentative 1255 * source address. 1256 */ 1257 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1258 if (hostIsNew && in6if_do_dad(ifp)) 1259 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1260 1261 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 1262 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1263 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1264 1265 /* notify other subsystems */ 1266 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1267 1268 return (error); 1269 } 1270 1271 /* 1272 * Do link-level ifa job: 1273 * 1) Add lle entry for added address 1274 * 2) Notifies routing socket users about new address 1275 * 3) join appropriate multicast group 1276 * 4) start DAD if enabled 1277 */ 1278 static int 1279 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1280 struct in6_ifaddr *ia, int flags) 1281 { 1282 struct in6_multi *in6m_sol; 1283 int error = 0; 1284 1285 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1286 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1287 in6_purgeaddr(&ia->ia_ifa); 1288 ifa_free(&ia->ia_ifa); 1289 return (error); 1290 } 1291 1292 /* Join necessary multicast groups. */ 1293 in6m_sol = NULL; 1294 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1295 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1296 if (error != 0) { 1297 in6_purgeaddr(&ia->ia_ifa); 1298 ifa_free(&ia->ia_ifa); 1299 return (error); 1300 } 1301 } 1302 1303 /* 1304 * Perform DAD, if needed. 1305 * XXX It may be of use, if we can administratively disable DAD. 1306 */ 1307 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1308 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1309 { 1310 int delay, mindelay, maxdelay; 1311 1312 delay = 0; 1313 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1314 /* 1315 * We need to impose a delay before sending an NS 1316 * for DAD. Check if we also needed a delay for the 1317 * corresponding MLD message. If we did, the delay 1318 * should be larger than the MLD delay (this could be 1319 * relaxed a bit, but this simple logic is at least 1320 * safe). 1321 * XXX: Break data hiding guidelines and look at 1322 * state for the solicited multicast group. 1323 */ 1324 mindelay = 0; 1325 if (in6m_sol != NULL && 1326 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1327 mindelay = in6m_sol->in6m_timer; 1328 } 1329 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1330 if (maxdelay - mindelay == 0) 1331 delay = 0; 1332 else { 1333 delay = 1334 (arc4random() % (maxdelay - mindelay)) + 1335 mindelay; 1336 } 1337 } 1338 nd6_dad_start((struct ifaddr *)ia, delay); 1339 } 1340 1341 ifa_free(&ia->ia_ifa); 1342 return (error); 1343 } 1344 1345 /* 1346 * Leave multicast groups. Factored out from in6_purgeaddr(). 1347 * This entire work should only be done once, for the default FIB. 1348 */ 1349 static int 1350 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0) 1351 { 1352 struct sockaddr_in6 mltaddr, mltmask; 1353 struct in6_multi_mship *imm; 1354 struct rtentry *rt; 1355 struct sockaddr_in6 sin6; 1356 int error; 1357 1358 /* 1359 * Leave from multicast groups we have joined for the interface. 1360 */ 1361 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1362 LIST_REMOVE(imm, i6mm_chain); 1363 in6_leavegroup(imm); 1364 } 1365 1366 /* 1367 * Remove the link-local all-nodes address. 1368 */ 1369 bzero(&mltmask, sizeof(mltmask)); 1370 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1371 mltmask.sin6_family = AF_INET6; 1372 mltmask.sin6_addr = in6mask32; 1373 1374 bzero(&mltaddr, sizeof(mltaddr)); 1375 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1376 mltaddr.sin6_family = AF_INET6; 1377 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1378 1379 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1380 return (error); 1381 1382 /* 1383 * As for the mltaddr above, proactively prepare the sin6 to avoid 1384 * rtentry un- and re-locking. 1385 */ 1386 if (ifa0 != NULL) { 1387 bzero(&sin6, sizeof(sin6)); 1388 sin6.sin6_len = sizeof(sin6); 1389 sin6.sin6_family = AF_INET6; 1390 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1391 sizeof(sin6.sin6_addr)); 1392 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL); 1393 if (error != 0) 1394 return (error); 1395 } 1396 1397 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1398 if (rt != NULL && rt->rt_gateway != NULL && 1399 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1400 &ia->ia_addr.sin6_addr, 1401 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1402 /* 1403 * If no more IPv6 address exists on this interface then 1404 * remove the multicast address route. 1405 */ 1406 if (ifa0 == NULL) { 1407 memcpy(&mltaddr.sin6_addr, 1408 &satosin6(rt_key(rt))->sin6_addr, 1409 sizeof(mltaddr.sin6_addr)); 1410 RTFREE_LOCKED(rt); 1411 error = in6_rtrequest(RTM_DELETE, 1412 (struct sockaddr *)&mltaddr, 1413 (struct sockaddr *)&ia->ia_addr, 1414 (struct sockaddr *)&mltmask, RTF_UP, 1415 (struct rtentry **)0, RT_DEFAULT_FIB); 1416 if (error) 1417 log(LOG_INFO, "%s: link-local all-nodes " 1418 "multicast address deletion error\n", 1419 __func__); 1420 } else { 1421 /* 1422 * Replace the gateway of the route. 1423 */ 1424 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1425 RTFREE_LOCKED(rt); 1426 } 1427 } else { 1428 if (rt != NULL) 1429 RTFREE_LOCKED(rt); 1430 } 1431 1432 /* 1433 * Remove the node-local all-nodes address. 1434 */ 1435 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1436 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1437 return (error); 1438 1439 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1440 if (rt != NULL && rt->rt_gateway != NULL && 1441 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1442 &ia->ia_addr.sin6_addr, 1443 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1444 /* 1445 * If no more IPv6 address exists on this interface then 1446 * remove the multicast address route. 1447 */ 1448 if (ifa0 == NULL) { 1449 memcpy(&mltaddr.sin6_addr, 1450 &satosin6(rt_key(rt))->sin6_addr, 1451 sizeof(mltaddr.sin6_addr)); 1452 1453 RTFREE_LOCKED(rt); 1454 error = in6_rtrequest(RTM_DELETE, 1455 (struct sockaddr *)&mltaddr, 1456 (struct sockaddr *)&ia->ia_addr, 1457 (struct sockaddr *)&mltmask, RTF_UP, 1458 (struct rtentry **)0, RT_DEFAULT_FIB); 1459 if (error) 1460 log(LOG_INFO, "%s: node-local all-nodes" 1461 "multicast address deletion error\n", 1462 __func__); 1463 } else { 1464 /* 1465 * Replace the gateway of the route. 1466 */ 1467 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1468 RTFREE_LOCKED(rt); 1469 } 1470 } else { 1471 if (rt != NULL) 1472 RTFREE_LOCKED(rt); 1473 } 1474 1475 return (0); 1476 } 1477 1478 void 1479 in6_purgeaddr(struct ifaddr *ifa) 1480 { 1481 struct ifnet *ifp = ifa->ifa_ifp; 1482 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1483 int plen, error; 1484 struct ifaddr *ifa0; 1485 1486 if (ifa->ifa_carp) 1487 (*carp_detach_p)(ifa); 1488 1489 /* 1490 * find another IPv6 address as the gateway for the 1491 * link-local and node-local all-nodes multicast 1492 * address routes 1493 */ 1494 IF_ADDR_RLOCK(ifp); 1495 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) { 1496 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1497 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1498 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0) 1499 continue; 1500 else 1501 break; 1502 } 1503 if (ifa0 != NULL) 1504 ifa_ref(ifa0); 1505 IF_ADDR_RUNLOCK(ifp); 1506 1507 /* 1508 * Remove the loopback route to the interface address. 1509 * The check for the current setting of "nd6_useloopback" 1510 * is not needed. 1511 */ 1512 if (ia->ia_flags & IFA_RTSELF) { 1513 error = ifa_del_loopback_route((struct ifaddr *)ia, 1514 (struct sockaddr *)&ia->ia_addr); 1515 if (error == 0) 1516 ia->ia_flags &= ~IFA_RTSELF; 1517 } 1518 1519 /* stop DAD processing */ 1520 nd6_dad_stop(ifa); 1521 1522 /* Remove local address entry from lltable. */ 1523 nd6_rem_ifa_lle(ia); 1524 1525 /* Leave multicast groups. */ 1526 error = in6_purgeaddr_mc(ifp, ia, ifa0); 1527 1528 if (ifa0 != NULL) 1529 ifa_free(ifa0); 1530 1531 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1532 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1533 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1534 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0); 1535 if (error != 0) 1536 log(LOG_INFO, "%s: err=%d, destination address delete " 1537 "failed\n", __func__, error); 1538 ia->ia_flags &= ~IFA_ROUTE; 1539 } 1540 1541 in6_unlink_ifa(ia, ifp); 1542 } 1543 1544 static void 1545 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1546 { 1547 1548 IF_ADDR_WLOCK(ifp); 1549 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1550 IF_ADDR_WUNLOCK(ifp); 1551 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1552 1553 /* 1554 * Defer the release of what might be the last reference to the 1555 * in6_ifaddr so that it can't be freed before the remainder of the 1556 * cleanup. 1557 */ 1558 IN6_IFADDR_WLOCK(); 1559 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1560 LIST_REMOVE(ia, ia6_hash); 1561 IN6_IFADDR_WUNLOCK(); 1562 1563 /* 1564 * Release the reference to the base prefix. There should be a 1565 * positive reference. 1566 */ 1567 if (ia->ia6_ndpr == NULL) { 1568 nd6log((LOG_NOTICE, 1569 "in6_unlink_ifa: autoconf'ed address " 1570 "%p has no prefix\n", ia)); 1571 } else { 1572 ia->ia6_ndpr->ndpr_refcnt--; 1573 ia->ia6_ndpr = NULL; 1574 } 1575 1576 /* 1577 * Also, if the address being removed is autoconf'ed, call 1578 * pfxlist_onlink_check() since the release might affect the status of 1579 * other (detached) addresses. 1580 */ 1581 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1582 pfxlist_onlink_check(); 1583 } 1584 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1585 } 1586 1587 void 1588 in6_purgeif(struct ifnet *ifp) 1589 { 1590 struct ifaddr *ifa, *nifa; 1591 1592 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1593 if (ifa->ifa_addr->sa_family != AF_INET6) 1594 continue; 1595 in6_purgeaddr(ifa); 1596 } 1597 1598 in6_ifdetach(ifp); 1599 } 1600 1601 /* 1602 * Notifies other other subsystems about address change/arrival: 1603 * 1) Notifies device handler on first IPv6 address assignment 1604 * 2) Handle routing table changes for P2P links and route 1605 * 3) Handle routing table changes for address host route 1606 */ 1607 static int 1608 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1609 struct in6_aliasreq *ifra, int hostIsNew) 1610 { 1611 int error = 0, plen, ifacount = 0; 1612 struct ifaddr *ifa; 1613 struct sockaddr_in6 *pdst; 1614 char ip6buf[INET6_ADDRSTRLEN]; 1615 1616 /* 1617 * Give the interface a chance to initialize 1618 * if this is its first address, 1619 */ 1620 if (hostIsNew != 0) { 1621 IF_ADDR_RLOCK(ifp); 1622 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1623 if (ifa->ifa_addr->sa_family != AF_INET6) 1624 continue; 1625 ifacount++; 1626 } 1627 IF_ADDR_RUNLOCK(ifp); 1628 } 1629 1630 if (ifacount <= 1 && ifp->if_ioctl) { 1631 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1632 if (error) 1633 return (error); 1634 } 1635 1636 /* 1637 * If a new destination address is specified, scrub the old one and 1638 * install the new destination. Note that the interface must be 1639 * p2p or loopback. 1640 */ 1641 pdst = &ifra->ifra_dstaddr; 1642 if (pdst->sin6_family == AF_INET6 && 1643 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1644 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1645 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1646 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1647 "remove a route to the old destination: %s\n", 1648 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1649 /* proceed anyway... */ 1650 } else 1651 ia->ia_flags &= ~IFA_ROUTE; 1652 ia->ia_dstaddr = *pdst; 1653 } 1654 1655 /* 1656 * If a new destination address is specified for a point-to-point 1657 * interface, install a route to the destination as an interface 1658 * direct route. 1659 * XXX: the logic below rejects assigning multiple addresses on a p2p 1660 * interface that share the same destination. 1661 */ 1662 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1663 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1664 ia->ia_dstaddr.sin6_family == AF_INET6) { 1665 int rtflags = RTF_UP | RTF_HOST; 1666 /* 1667 * Handle the case for ::1 . 1668 */ 1669 if (ifp->if_flags & IFF_LOOPBACK) 1670 ia->ia_flags |= IFA_RTSELF; 1671 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1672 if (error) 1673 return (error); 1674 ia->ia_flags |= IFA_ROUTE; 1675 } 1676 1677 /* 1678 * add a loopback route to self if not exists 1679 */ 1680 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1681 error = ifa_add_loopback_route((struct ifaddr *)ia, 1682 (struct sockaddr *)&ia->ia_addr); 1683 if (error == 0) 1684 ia->ia_flags |= IFA_RTSELF; 1685 } 1686 1687 return (error); 1688 } 1689 1690 /* 1691 * Find an IPv6 interface link-local address specific to an interface. 1692 * ifaddr is returned referenced. 1693 */ 1694 struct in6_ifaddr * 1695 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1696 { 1697 struct ifaddr *ifa; 1698 1699 IF_ADDR_RLOCK(ifp); 1700 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1701 if (ifa->ifa_addr->sa_family != AF_INET6) 1702 continue; 1703 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1704 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1705 ignoreflags) != 0) 1706 continue; 1707 ifa_ref(ifa); 1708 break; 1709 } 1710 } 1711 IF_ADDR_RUNLOCK(ifp); 1712 1713 return ((struct in6_ifaddr *)ifa); 1714 } 1715 1716 1717 /* 1718 * find the internet address corresponding to a given address. 1719 * ifaddr is returned referenced. 1720 */ 1721 struct in6_ifaddr * 1722 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1723 { 1724 struct in6_ifaddr *ia; 1725 1726 IN6_IFADDR_RLOCK(); 1727 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1728 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1729 if (zoneid != 0 && 1730 zoneid != ia->ia_addr.sin6_scope_id) 1731 continue; 1732 ifa_ref(&ia->ia_ifa); 1733 break; 1734 } 1735 } 1736 IN6_IFADDR_RUNLOCK(); 1737 return (ia); 1738 } 1739 1740 /* 1741 * find the internet address corresponding to a given interface and address. 1742 * ifaddr is returned referenced. 1743 */ 1744 struct in6_ifaddr * 1745 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1746 { 1747 struct ifaddr *ifa; 1748 1749 IF_ADDR_RLOCK(ifp); 1750 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1751 if (ifa->ifa_addr->sa_family != AF_INET6) 1752 continue; 1753 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1754 ifa_ref(ifa); 1755 break; 1756 } 1757 } 1758 IF_ADDR_RUNLOCK(ifp); 1759 1760 return ((struct in6_ifaddr *)ifa); 1761 } 1762 1763 /* 1764 * Find a link-local scoped address on ifp and return it if any. 1765 */ 1766 struct in6_ifaddr * 1767 in6ifa_llaonifp(struct ifnet *ifp) 1768 { 1769 struct sockaddr_in6 *sin6; 1770 struct ifaddr *ifa; 1771 1772 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1773 return (NULL); 1774 if_addr_rlock(ifp); 1775 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1776 if (ifa->ifa_addr->sa_family != AF_INET6) 1777 continue; 1778 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1779 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1780 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1781 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1782 break; 1783 } 1784 if_addr_runlock(ifp); 1785 1786 return ((struct in6_ifaddr *)ifa); 1787 } 1788 1789 /* 1790 * Convert IP6 address to printable (loggable) representation. Caller 1791 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1792 */ 1793 static char digits[] = "0123456789abcdef"; 1794 char * 1795 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1796 { 1797 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1798 char *cp; 1799 const u_int16_t *a = (const u_int16_t *)addr; 1800 const u_int8_t *d; 1801 int dcolon = 0, zero = 0; 1802 1803 cp = ip6buf; 1804 1805 for (i = 0; i < 8; i++) { 1806 if (*(a + i) == 0) { 1807 cnt++; 1808 if (cnt == 1) 1809 idx = i; 1810 } 1811 else if (maxcnt < cnt) { 1812 maxcnt = cnt; 1813 index = idx; 1814 cnt = 0; 1815 } 1816 } 1817 if (maxcnt < cnt) { 1818 maxcnt = cnt; 1819 index = idx; 1820 } 1821 1822 for (i = 0; i < 8; i++) { 1823 if (dcolon == 1) { 1824 if (*a == 0) { 1825 if (i == 7) 1826 *cp++ = ':'; 1827 a++; 1828 continue; 1829 } else 1830 dcolon = 2; 1831 } 1832 if (*a == 0) { 1833 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1834 if (i == 0) 1835 *cp++ = ':'; 1836 *cp++ = ':'; 1837 dcolon = 1; 1838 } else { 1839 *cp++ = '0'; 1840 *cp++ = ':'; 1841 } 1842 a++; 1843 continue; 1844 } 1845 d = (const u_char *)a; 1846 /* Try to eliminate leading zeros in printout like in :0001. */ 1847 zero = 1; 1848 *cp = digits[*d >> 4]; 1849 if (*cp != '0') { 1850 zero = 0; 1851 cp++; 1852 } 1853 *cp = digits[*d++ & 0xf]; 1854 if (zero == 0 || (*cp != '0')) { 1855 zero = 0; 1856 cp++; 1857 } 1858 *cp = digits[*d >> 4]; 1859 if (zero == 0 || (*cp != '0')) { 1860 zero = 0; 1861 cp++; 1862 } 1863 *cp++ = digits[*d & 0xf]; 1864 *cp++ = ':'; 1865 a++; 1866 } 1867 *--cp = '\0'; 1868 return (ip6buf); 1869 } 1870 1871 int 1872 in6_localaddr(struct in6_addr *in6) 1873 { 1874 struct in6_ifaddr *ia; 1875 1876 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1877 return 1; 1878 1879 IN6_IFADDR_RLOCK(); 1880 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1881 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1882 &ia->ia_prefixmask.sin6_addr)) { 1883 IN6_IFADDR_RUNLOCK(); 1884 return 1; 1885 } 1886 } 1887 IN6_IFADDR_RUNLOCK(); 1888 1889 return (0); 1890 } 1891 1892 /* 1893 * Return 1 if an internet address is for the local host and configured 1894 * on one of its interfaces. 1895 */ 1896 int 1897 in6_localip(struct in6_addr *in6) 1898 { 1899 struct in6_ifaddr *ia; 1900 1901 IN6_IFADDR_RLOCK(); 1902 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1903 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1904 IN6_IFADDR_RUNLOCK(); 1905 return (1); 1906 } 1907 } 1908 IN6_IFADDR_RUNLOCK(); 1909 return (0); 1910 } 1911 1912 int 1913 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1914 { 1915 struct in6_ifaddr *ia; 1916 1917 IN6_IFADDR_RLOCK(); 1918 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1919 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1920 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1921 IN6_IFADDR_RUNLOCK(); 1922 return (1); /* true */ 1923 } 1924 break; 1925 } 1926 } 1927 IN6_IFADDR_RUNLOCK(); 1928 1929 return (0); /* false */ 1930 } 1931 1932 /* 1933 * return length of part which dst and src are equal 1934 * hard coding... 1935 */ 1936 int 1937 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1938 { 1939 int match = 0; 1940 u_char *s = (u_char *)src, *d = (u_char *)dst; 1941 u_char *lim = s + 16, r; 1942 1943 while (s < lim) 1944 if ((r = (*d++ ^ *s++)) != 0) { 1945 while (r < 128) { 1946 match++; 1947 r <<= 1; 1948 } 1949 break; 1950 } else 1951 match += 8; 1952 return match; 1953 } 1954 1955 /* XXX: to be scope conscious */ 1956 int 1957 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1958 { 1959 int bytelen, bitlen; 1960 1961 /* sanity check */ 1962 if (0 > len || len > 128) { 1963 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1964 len); 1965 return (0); 1966 } 1967 1968 bytelen = len / 8; 1969 bitlen = len % 8; 1970 1971 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1972 return (0); 1973 if (bitlen != 0 && 1974 p1->s6_addr[bytelen] >> (8 - bitlen) != 1975 p2->s6_addr[bytelen] >> (8 - bitlen)) 1976 return (0); 1977 1978 return (1); 1979 } 1980 1981 void 1982 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1983 { 1984 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1985 int bytelen, bitlen, i; 1986 1987 /* sanity check */ 1988 if (0 > len || len > 128) { 1989 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1990 len); 1991 return; 1992 } 1993 1994 bzero(maskp, sizeof(*maskp)); 1995 bytelen = len / 8; 1996 bitlen = len % 8; 1997 for (i = 0; i < bytelen; i++) 1998 maskp->s6_addr[i] = 0xff; 1999 if (bitlen) 2000 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2001 } 2002 2003 /* 2004 * return the best address out of the same scope. if no address was 2005 * found, return the first valid address from designated IF. 2006 */ 2007 struct in6_ifaddr * 2008 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2009 { 2010 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2011 struct ifaddr *ifa; 2012 struct in6_ifaddr *besta = 0; 2013 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2014 2015 dep[0] = dep[1] = NULL; 2016 2017 /* 2018 * We first look for addresses in the same scope. 2019 * If there is one, return it. 2020 * If two or more, return one which matches the dst longest. 2021 * If none, return one of global addresses assigned other ifs. 2022 */ 2023 IF_ADDR_RLOCK(ifp); 2024 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2025 if (ifa->ifa_addr->sa_family != AF_INET6) 2026 continue; 2027 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2028 continue; /* XXX: is there any case to allow anycast? */ 2029 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2030 continue; /* don't use this interface */ 2031 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2032 continue; 2033 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2034 if (V_ip6_use_deprecated) 2035 dep[0] = (struct in6_ifaddr *)ifa; 2036 continue; 2037 } 2038 2039 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2040 /* 2041 * call in6_matchlen() as few as possible 2042 */ 2043 if (besta) { 2044 if (blen == -1) 2045 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2046 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2047 if (tlen > blen) { 2048 blen = tlen; 2049 besta = (struct in6_ifaddr *)ifa; 2050 } 2051 } else 2052 besta = (struct in6_ifaddr *)ifa; 2053 } 2054 } 2055 if (besta) { 2056 ifa_ref(&besta->ia_ifa); 2057 IF_ADDR_RUNLOCK(ifp); 2058 return (besta); 2059 } 2060 2061 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2062 if (ifa->ifa_addr->sa_family != AF_INET6) 2063 continue; 2064 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2065 continue; /* XXX: is there any case to allow anycast? */ 2066 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2067 continue; /* don't use this interface */ 2068 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2069 continue; 2070 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2071 if (V_ip6_use_deprecated) 2072 dep[1] = (struct in6_ifaddr *)ifa; 2073 continue; 2074 } 2075 2076 if (ifa != NULL) 2077 ifa_ref(ifa); 2078 IF_ADDR_RUNLOCK(ifp); 2079 return (struct in6_ifaddr *)ifa; 2080 } 2081 2082 /* use the last-resort values, that are, deprecated addresses */ 2083 if (dep[0]) { 2084 ifa_ref((struct ifaddr *)dep[0]); 2085 IF_ADDR_RUNLOCK(ifp); 2086 return dep[0]; 2087 } 2088 if (dep[1]) { 2089 ifa_ref((struct ifaddr *)dep[1]); 2090 IF_ADDR_RUNLOCK(ifp); 2091 return dep[1]; 2092 } 2093 2094 IF_ADDR_RUNLOCK(ifp); 2095 return NULL; 2096 } 2097 2098 /* 2099 * perform DAD when interface becomes IFF_UP. 2100 */ 2101 void 2102 in6_if_up(struct ifnet *ifp) 2103 { 2104 struct ifaddr *ifa; 2105 struct in6_ifaddr *ia; 2106 2107 IF_ADDR_RLOCK(ifp); 2108 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2109 if (ifa->ifa_addr->sa_family != AF_INET6) 2110 continue; 2111 ia = (struct in6_ifaddr *)ifa; 2112 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2113 /* 2114 * The TENTATIVE flag was likely set by hand 2115 * beforehand, implicitly indicating the need for DAD. 2116 * We may be able to skip the random delay in this 2117 * case, but we impose delays just in case. 2118 */ 2119 nd6_dad_start(ifa, 2120 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2121 } 2122 } 2123 IF_ADDR_RUNLOCK(ifp); 2124 2125 /* 2126 * special cases, like 6to4, are handled in in6_ifattach 2127 */ 2128 in6_ifattach(ifp, NULL); 2129 } 2130 2131 int 2132 in6if_do_dad(struct ifnet *ifp) 2133 { 2134 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2135 return (0); 2136 2137 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 2138 return (0); 2139 2140 switch (ifp->if_type) { 2141 #ifdef IFT_DUMMY 2142 case IFT_DUMMY: 2143 #endif 2144 case IFT_FAITH: 2145 /* 2146 * These interfaces do not have the IFF_LOOPBACK flag, 2147 * but loop packets back. We do not have to do DAD on such 2148 * interfaces. We should even omit it, because loop-backed 2149 * NS would confuse the DAD procedure. 2150 */ 2151 return (0); 2152 default: 2153 /* 2154 * Our DAD routine requires the interface up and running. 2155 * However, some interfaces can be up before the RUNNING 2156 * status. Additionaly, users may try to assign addresses 2157 * before the interface becomes up (or running). 2158 * We simply skip DAD in such a case as a work around. 2159 * XXX: we should rather mark "tentative" on such addresses, 2160 * and do DAD after the interface becomes ready. 2161 */ 2162 if (!((ifp->if_flags & IFF_UP) && 2163 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2164 return (0); 2165 2166 return (1); 2167 } 2168 } 2169 2170 /* 2171 * Calculate max IPv6 MTU through all the interfaces and store it 2172 * to in6_maxmtu. 2173 */ 2174 void 2175 in6_setmaxmtu(void) 2176 { 2177 unsigned long maxmtu = 0; 2178 struct ifnet *ifp; 2179 2180 IFNET_RLOCK_NOSLEEP(); 2181 TAILQ_FOREACH(ifp, &V_ifnet, if_list) { 2182 /* this function can be called during ifnet initialization */ 2183 if (!ifp->if_afdata[AF_INET6]) 2184 continue; 2185 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2186 IN6_LINKMTU(ifp) > maxmtu) 2187 maxmtu = IN6_LINKMTU(ifp); 2188 } 2189 IFNET_RUNLOCK_NOSLEEP(); 2190 if (maxmtu) /* update only when maxmtu is positive */ 2191 V_in6_maxmtu = maxmtu; 2192 } 2193 2194 /* 2195 * Provide the length of interface identifiers to be used for the link attached 2196 * to the given interface. The length should be defined in "IPv6 over 2197 * xxx-link" document. Note that address architecture might also define 2198 * the length for a particular set of address prefixes, regardless of the 2199 * link type. As clarified in rfc2462bis, those two definitions should be 2200 * consistent, and those really are as of August 2004. 2201 */ 2202 int 2203 in6_if2idlen(struct ifnet *ifp) 2204 { 2205 switch (ifp->if_type) { 2206 case IFT_ETHER: /* RFC2464 */ 2207 #ifdef IFT_PROPVIRTUAL 2208 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2209 #endif 2210 #ifdef IFT_L2VLAN 2211 case IFT_L2VLAN: /* ditto */ 2212 #endif 2213 #ifdef IFT_IEEE80211 2214 case IFT_IEEE80211: /* ditto */ 2215 #endif 2216 #ifdef IFT_MIP 2217 case IFT_MIP: /* ditto */ 2218 #endif 2219 case IFT_INFINIBAND: 2220 return (64); 2221 case IFT_FDDI: /* RFC2467 */ 2222 return (64); 2223 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2224 return (64); 2225 case IFT_PPP: /* RFC2472 */ 2226 return (64); 2227 case IFT_ARCNET: /* RFC2497 */ 2228 return (64); 2229 case IFT_FRELAY: /* RFC2590 */ 2230 return (64); 2231 case IFT_IEEE1394: /* RFC3146 */ 2232 return (64); 2233 case IFT_GIF: 2234 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2235 case IFT_LOOP: 2236 return (64); /* XXX: is this really correct? */ 2237 default: 2238 /* 2239 * Unknown link type: 2240 * It might be controversial to use the today's common constant 2241 * of 64 for these cases unconditionally. For full compliance, 2242 * we should return an error in this case. On the other hand, 2243 * if we simply miss the standard for the link type or a new 2244 * standard is defined for a new link type, the IFID length 2245 * is very likely to be the common constant. As a compromise, 2246 * we always use the constant, but make an explicit notice 2247 * indicating the "unknown" case. 2248 */ 2249 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2250 return (64); 2251 } 2252 } 2253 2254 #include <sys/sysctl.h> 2255 2256 struct in6_llentry { 2257 struct llentry base; 2258 struct sockaddr_in6 l3_addr6; 2259 }; 2260 2261 /* 2262 * Deletes an address from the address table. 2263 * This function is called by the timer functions 2264 * such as arptimer() and nd6_llinfo_timer(), and 2265 * the caller does the locking. 2266 */ 2267 static void 2268 in6_lltable_free(struct lltable *llt, struct llentry *lle) 2269 { 2270 LLE_WUNLOCK(lle); 2271 LLE_LOCK_DESTROY(lle); 2272 free(lle, M_LLTABLE); 2273 } 2274 2275 static struct llentry * 2276 in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2277 { 2278 struct in6_llentry *lle; 2279 2280 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2281 if (lle == NULL) /* NB: caller generates msg */ 2282 return NULL; 2283 2284 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2285 lle->base.lle_refcnt = 1; 2286 lle->base.lle_free = in6_lltable_free; 2287 LLE_LOCK_INIT(&lle->base); 2288 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock, 2289 CALLOUT_RETURNUNLOCKED); 2290 2291 return (&lle->base); 2292 } 2293 2294 static void 2295 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 2296 const struct sockaddr *mask, u_int flags) 2297 { 2298 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2299 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2300 struct llentry *lle, *next; 2301 int i; 2302 2303 /* 2304 * (flags & LLE_STATIC) means deleting all entries 2305 * including static ND6 entries. 2306 */ 2307 IF_AFDATA_WLOCK(llt->llt_ifp); 2308 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2309 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2310 if (IN6_ARE_MASKED_ADDR_EQUAL( 2311 &satosin6(L3_ADDR(lle))->sin6_addr, 2312 &pfx->sin6_addr, &msk->sin6_addr) && 2313 ((flags & LLE_STATIC) || 2314 !(lle->la_flags & LLE_STATIC))) { 2315 LLE_WLOCK(lle); 2316 if (callout_stop(&lle->la_timer)) 2317 LLE_REMREF(lle); 2318 llentry_free(lle); 2319 } 2320 } 2321 } 2322 IF_AFDATA_WUNLOCK(llt->llt_ifp); 2323 } 2324 2325 static int 2326 in6_lltable_rtcheck(struct ifnet *ifp, 2327 u_int flags, 2328 const struct sockaddr *l3addr) 2329 { 2330 struct rtentry *rt; 2331 char ip6buf[INET6_ADDRSTRLEN]; 2332 2333 KASSERT(l3addr->sa_family == AF_INET6, 2334 ("sin_family %d", l3addr->sa_family)); 2335 2336 /* Our local addresses are always only installed on the default FIB. */ 2337 /* XXX rtalloc1 should take a const param */ 2338 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0, 2339 RT_DEFAULT_FIB); 2340 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2341 struct ifaddr *ifa; 2342 /* 2343 * Create an ND6 cache for an IPv6 neighbor 2344 * that is not covered by our own prefix. 2345 */ 2346 /* XXX ifaof_ifpforaddr should take a const param */ 2347 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2348 if (ifa != NULL) { 2349 ifa_free(ifa); 2350 if (rt != NULL) 2351 RTFREE_LOCKED(rt); 2352 return 0; 2353 } 2354 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2355 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2356 if (rt != NULL) 2357 RTFREE_LOCKED(rt); 2358 return EINVAL; 2359 } 2360 RTFREE_LOCKED(rt); 2361 return 0; 2362 } 2363 2364 static struct llentry * 2365 in6_lltable_lookup(struct lltable *llt, u_int flags, 2366 const struct sockaddr *l3addr) 2367 { 2368 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2369 struct ifnet *ifp = llt->llt_ifp; 2370 struct llentry *lle; 2371 struct llentries *lleh; 2372 u_int hashkey; 2373 2374 IF_AFDATA_LOCK_ASSERT(ifp); 2375 KASSERT(l3addr->sa_family == AF_INET6, 2376 ("sin_family %d", l3addr->sa_family)); 2377 2378 hashkey = sin6->sin6_addr.s6_addr32[3]; 2379 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2380 LIST_FOREACH(lle, lleh, lle_next) { 2381 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2382 if (lle->la_flags & LLE_DELETED) 2383 continue; 2384 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2385 sizeof(struct in6_addr)) == 0) 2386 break; 2387 } 2388 2389 if (lle == NULL) { 2390 if (!(flags & LLE_CREATE)) 2391 return (NULL); 2392 IF_AFDATA_WLOCK_ASSERT(ifp); 2393 /* 2394 * A route that covers the given address must have 2395 * been installed 1st because we are doing a resolution, 2396 * verify this. 2397 */ 2398 if (!(flags & LLE_IFADDR) && 2399 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2400 return NULL; 2401 2402 lle = in6_lltable_new(l3addr, flags); 2403 if (lle == NULL) { 2404 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2405 return NULL; 2406 } 2407 lle->la_flags = flags & ~LLE_CREATE; 2408 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2409 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2410 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2411 } 2412 2413 lle->lle_tbl = llt; 2414 lle->lle_head = lleh; 2415 lle->la_flags |= LLE_LINKED; 2416 LIST_INSERT_HEAD(lleh, lle, lle_next); 2417 } else if (flags & LLE_DELETE) { 2418 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2419 LLE_WLOCK(lle); 2420 lle->la_flags |= LLE_DELETED; 2421 #ifdef DIAGNOSTIC 2422 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2423 #endif 2424 if ((lle->la_flags & 2425 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 2426 llentry_free(lle); 2427 else 2428 LLE_WUNLOCK(lle); 2429 } 2430 lle = (void *)-1; 2431 } 2432 if (LLE_IS_VALID(lle)) { 2433 if (flags & LLE_EXCLUSIVE) 2434 LLE_WLOCK(lle); 2435 else 2436 LLE_RLOCK(lle); 2437 } 2438 return (lle); 2439 } 2440 2441 static int 2442 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2443 { 2444 struct ifnet *ifp = llt->llt_ifp; 2445 struct llentry *lle; 2446 /* XXX stack use */ 2447 struct { 2448 struct rt_msghdr rtm; 2449 struct sockaddr_in6 sin6; 2450 /* 2451 * ndp.c assumes that sdl is word aligned 2452 */ 2453 #ifdef __LP64__ 2454 uint32_t pad; 2455 #endif 2456 struct sockaddr_dl sdl; 2457 } ndpc; 2458 int i, error; 2459 2460 if (ifp->if_flags & IFF_LOOPBACK) 2461 return 0; 2462 2463 LLTABLE_LOCK_ASSERT(); 2464 2465 error = 0; 2466 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2467 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2468 struct sockaddr_dl *sdl; 2469 2470 /* skip deleted or invalid entries */ 2471 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2472 continue; 2473 /* Skip if jailed and not a valid IP of the prison. */ 2474 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2475 continue; 2476 /* 2477 * produce a msg made of: 2478 * struct rt_msghdr; 2479 * struct sockaddr_in6 (IPv6) 2480 * struct sockaddr_dl; 2481 */ 2482 bzero(&ndpc, sizeof(ndpc)); 2483 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2484 ndpc.rtm.rtm_version = RTM_VERSION; 2485 ndpc.rtm.rtm_type = RTM_GET; 2486 ndpc.rtm.rtm_flags = RTF_UP; 2487 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2488 ndpc.sin6.sin6_family = AF_INET6; 2489 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2490 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2491 if (V_deembed_scopeid) 2492 sa6_recoverscope(&ndpc.sin6); 2493 2494 /* publish */ 2495 if (lle->la_flags & LLE_PUB) 2496 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2497 2498 sdl = &ndpc.sdl; 2499 sdl->sdl_family = AF_LINK; 2500 sdl->sdl_len = sizeof(*sdl); 2501 sdl->sdl_alen = ifp->if_addrlen; 2502 sdl->sdl_index = ifp->if_index; 2503 sdl->sdl_type = ifp->if_type; 2504 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2505 ndpc.rtm.rtm_rmx.rmx_expire = 2506 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2507 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2508 if (lle->la_flags & LLE_STATIC) 2509 ndpc.rtm.rtm_flags |= RTF_STATIC; 2510 ndpc.rtm.rtm_index = ifp->if_index; 2511 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2512 if (error) 2513 break; 2514 } 2515 } 2516 return error; 2517 } 2518 2519 void * 2520 in6_domifattach(struct ifnet *ifp) 2521 { 2522 struct in6_ifextra *ext; 2523 2524 /* There are not IPv6-capable interfaces. */ 2525 switch (ifp->if_type) { 2526 case IFT_PFLOG: 2527 case IFT_PFSYNC: 2528 case IFT_USB: 2529 return (NULL); 2530 } 2531 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2532 bzero(ext, sizeof(*ext)); 2533 2534 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2535 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2536 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2537 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2538 2539 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2540 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2541 M_WAITOK); 2542 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2543 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2544 2545 ext->nd_ifinfo = nd6_ifattach(ifp); 2546 ext->scope6_id = scope6_ifattach(ifp); 2547 ext->lltable = lltable_init(ifp, AF_INET6); 2548 if (ext->lltable != NULL) { 2549 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2550 ext->lltable->llt_lookup = in6_lltable_lookup; 2551 ext->lltable->llt_dump = in6_lltable_dump; 2552 } 2553 2554 ext->mld_ifinfo = mld_domifattach(ifp); 2555 2556 return ext; 2557 } 2558 2559 void 2560 in6_domifdetach(struct ifnet *ifp, void *aux) 2561 { 2562 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2563 2564 mld_domifdetach(ifp); 2565 scope6_ifdetach(ext->scope6_id); 2566 nd6_ifdetach(ext->nd_ifinfo); 2567 lltable_free(ext->lltable); 2568 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2569 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2570 free(ext->in6_ifstat, M_IFADDR); 2571 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2572 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2573 free(ext->icmp6_ifstat, M_IFADDR); 2574 free(ext, M_IFADDR); 2575 } 2576 2577 /* 2578 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2579 * v4 mapped addr or v4 compat addr 2580 */ 2581 void 2582 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2583 { 2584 2585 bzero(sin, sizeof(*sin)); 2586 sin->sin_len = sizeof(struct sockaddr_in); 2587 sin->sin_family = AF_INET; 2588 sin->sin_port = sin6->sin6_port; 2589 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2590 } 2591 2592 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2593 void 2594 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2595 { 2596 bzero(sin6, sizeof(*sin6)); 2597 sin6->sin6_len = sizeof(struct sockaddr_in6); 2598 sin6->sin6_family = AF_INET6; 2599 sin6->sin6_port = sin->sin_port; 2600 sin6->sin6_addr.s6_addr32[0] = 0; 2601 sin6->sin6_addr.s6_addr32[1] = 0; 2602 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2603 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2604 } 2605 2606 /* Convert sockaddr_in6 into sockaddr_in. */ 2607 void 2608 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2609 { 2610 struct sockaddr_in *sin_p; 2611 struct sockaddr_in6 sin6; 2612 2613 /* 2614 * Save original sockaddr_in6 addr and convert it 2615 * to sockaddr_in. 2616 */ 2617 sin6 = *(struct sockaddr_in6 *)nam; 2618 sin_p = (struct sockaddr_in *)nam; 2619 in6_sin6_2_sin(sin_p, &sin6); 2620 } 2621 2622 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2623 void 2624 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2625 { 2626 struct sockaddr_in *sin_p; 2627 struct sockaddr_in6 *sin6_p; 2628 2629 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2630 sin_p = (struct sockaddr_in *)*nam; 2631 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2632 free(*nam, M_SONAME); 2633 *nam = (struct sockaddr *)sin6_p; 2634 } 2635