in6.c revision 195643
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: head/sys/netinet6/in6.c 195643 2009-07-12 19:20:55Z qingli $"); 65 66#include "opt_inet.h" 67#include "opt_inet6.h" 68 69#include <sys/param.h> 70#include <sys/errno.h> 71#include <sys/jail.h> 72#include <sys/malloc.h> 73#include <sys/socket.h> 74#include <sys/socketvar.h> 75#include <sys/sockio.h> 76#include <sys/systm.h> 77#include <sys/priv.h> 78#include <sys/proc.h> 79#include <sys/time.h> 80#include <sys/kernel.h> 81#include <sys/syslog.h> 82#include <sys/vimage.h> 83 84#include <net/if.h> 85#include <net/if_types.h> 86#include <net/route.h> 87#include <net/if_dl.h> 88#include <net/vnet.h> 89 90#include <netinet/in.h> 91#include <netinet/in_var.h> 92#include <net/if_llatbl.h> 93#include <netinet/if_ether.h> 94#include <netinet/in_systm.h> 95#include <netinet/ip.h> 96#include <netinet/in_pcb.h> 97 98#include <netinet/ip6.h> 99#include <netinet6/ip6_var.h> 100#include <netinet6/nd6.h> 101#include <netinet6/mld6_var.h> 102#include <netinet6/ip6_mroute.h> 103#include <netinet6/in6_ifattach.h> 104#include <netinet6/scope6_var.h> 105#include <netinet6/in6_pcb.h> 106#include <netinet6/vinet6.h> 107 108/* 109 * Definitions of some costant IP6 addresses. 110 */ 111const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 112const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 113const struct in6_addr in6addr_nodelocal_allnodes = 114 IN6ADDR_NODELOCAL_ALLNODES_INIT; 115const struct in6_addr in6addr_linklocal_allnodes = 116 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 117const struct in6_addr in6addr_linklocal_allrouters = 118 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 119const struct in6_addr in6addr_linklocal_allv2routers = 120 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 121 122const struct in6_addr in6mask0 = IN6MASK0; 123const struct in6_addr in6mask32 = IN6MASK32; 124const struct in6_addr in6mask64 = IN6MASK64; 125const struct in6_addr in6mask96 = IN6MASK96; 126const struct in6_addr in6mask128 = IN6MASK128; 127 128const struct sockaddr_in6 sa6_any = 129 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 130 131static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, 132 struct ifnet *, struct thread *)); 133static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, 134 struct sockaddr_in6 *, int)); 135static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 136 137int (*faithprefix_p)(struct in6_addr *); 138 139 140 141int 142in6_mask2len(struct in6_addr *mask, u_char *lim0) 143{ 144 int x = 0, y; 145 u_char *lim = lim0, *p; 146 147 /* ignore the scope_id part */ 148 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 149 lim = (u_char *)mask + sizeof(*mask); 150 for (p = (u_char *)mask; p < lim; x++, p++) { 151 if (*p != 0xff) 152 break; 153 } 154 y = 0; 155 if (p < lim) { 156 for (y = 0; y < 8; y++) { 157 if ((*p & (0x80 >> y)) == 0) 158 break; 159 } 160 } 161 162 /* 163 * when the limit pointer is given, do a stricter check on the 164 * remaining bits. 165 */ 166 if (p < lim) { 167 if (y != 0 && (*p & (0x00ff >> y)) != 0) 168 return (-1); 169 for (p = p + 1; p < lim; p++) 170 if (*p != 0) 171 return (-1); 172 } 173 174 return x * 8 + y; 175} 176 177#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 178#define ia62ifa(ia6) (&((ia6)->ia_ifa)) 179 180int 181in6_control(struct socket *so, u_long cmd, caddr_t data, 182 struct ifnet *ifp, struct thread *td) 183{ 184 INIT_VNET_INET6(curvnet); 185 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 186 struct in6_ifaddr *ia = NULL; 187 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 188 struct sockaddr_in6 *sa6; 189 int error; 190 191 switch (cmd) { 192 case SIOCGETSGCNT_IN6: 193 case SIOCGETMIFCNT_IN6: 194 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 195 } 196 197 switch(cmd) { 198 case SIOCAADDRCTL_POLICY: 199 case SIOCDADDRCTL_POLICY: 200 if (td != NULL) { 201 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 202 if (error) 203 return (error); 204 } 205 return (in6_src_ioctl(cmd, data)); 206 } 207 208 if (ifp == NULL) 209 return (EOPNOTSUPP); 210 211 switch (cmd) { 212 case SIOCSNDFLUSH_IN6: 213 case SIOCSPFXFLUSH_IN6: 214 case SIOCSRTRFLUSH_IN6: 215 case SIOCSDEFIFACE_IN6: 216 case SIOCSIFINFO_FLAGS: 217 case SIOCSIFINFO_IN6: 218 if (td != NULL) { 219 error = priv_check(td, PRIV_NETINET_ND6); 220 if (error) 221 return (error); 222 } 223 /* FALLTHROUGH */ 224 case OSIOCGIFINFO_IN6: 225 case SIOCGIFINFO_IN6: 226 case SIOCGDRLST_IN6: 227 case SIOCGPRLST_IN6: 228 case SIOCGNBRINFO_IN6: 229 case SIOCGDEFIFACE_IN6: 230 return (nd6_ioctl(cmd, data, ifp)); 231 } 232 233 switch (cmd) { 234 case SIOCSIFPREFIX_IN6: 235 case SIOCDIFPREFIX_IN6: 236 case SIOCAIFPREFIX_IN6: 237 case SIOCCIFPREFIX_IN6: 238 case SIOCSGIFPREFIX_IN6: 239 case SIOCGIFPREFIX_IN6: 240 log(LOG_NOTICE, 241 "prefix ioctls are now invalidated. " 242 "please use ifconfig.\n"); 243 return (EOPNOTSUPP); 244 } 245 246 switch (cmd) { 247 case SIOCSSCOPE6: 248 if (td != NULL) { 249 error = priv_check(td, PRIV_NETINET_SCOPE6); 250 if (error) 251 return (error); 252 } 253 return (scope6_set(ifp, 254 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 255 case SIOCGSCOPE6: 256 return (scope6_get(ifp, 257 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 258 case SIOCGSCOPE6DEF: 259 return (scope6_get_default((struct scope6_id *) 260 ifr->ifr_ifru.ifru_scope_id)); 261 } 262 263 switch (cmd) { 264 case SIOCALIFADDR: 265 if (td != NULL) { 266 error = priv_check(td, PRIV_NET_ADDIFADDR); 267 if (error) 268 return (error); 269 } 270 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 271 272 case SIOCDLIFADDR: 273 if (td != NULL) { 274 error = priv_check(td, PRIV_NET_DELIFADDR); 275 if (error) 276 return (error); 277 } 278 /* FALLTHROUGH */ 279 case SIOCGLIFADDR: 280 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 281 } 282 283 /* 284 * Find address for this interface, if it exists. 285 * 286 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 287 * only, and used the first interface address as the target of other 288 * operations (without checking ifra_addr). This was because netinet 289 * code/API assumed at most 1 interface address per interface. 290 * Since IPv6 allows a node to assign multiple addresses 291 * on a single interface, we almost always look and check the 292 * presence of ifra_addr, and reject invalid ones here. 293 * It also decreases duplicated code among SIOC*_IN6 operations. 294 */ 295 switch (cmd) { 296 case SIOCAIFADDR_IN6: 297 case SIOCSIFPHYADDR_IN6: 298 sa6 = &ifra->ifra_addr; 299 break; 300 case SIOCSIFADDR_IN6: 301 case SIOCGIFADDR_IN6: 302 case SIOCSIFDSTADDR_IN6: 303 case SIOCSIFNETMASK_IN6: 304 case SIOCGIFDSTADDR_IN6: 305 case SIOCGIFNETMASK_IN6: 306 case SIOCDIFADDR_IN6: 307 case SIOCGIFPSRCADDR_IN6: 308 case SIOCGIFPDSTADDR_IN6: 309 case SIOCGIFAFLAG_IN6: 310 case SIOCSNDFLUSH_IN6: 311 case SIOCSPFXFLUSH_IN6: 312 case SIOCSRTRFLUSH_IN6: 313 case SIOCGIFALIFETIME_IN6: 314 case SIOCSIFALIFETIME_IN6: 315 case SIOCGIFSTAT_IN6: 316 case SIOCGIFSTAT_ICMP6: 317 sa6 = &ifr->ifr_addr; 318 break; 319 default: 320 sa6 = NULL; 321 break; 322 } 323 if (sa6 && sa6->sin6_family == AF_INET6) { 324 if (sa6->sin6_scope_id != 0) 325 error = sa6_embedscope(sa6, 0); 326 else 327 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 328 if (error != 0) 329 return (error); 330 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 331 &sa6->sin6_addr)) != 0) 332 return (error); 333 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 334 } else 335 ia = NULL; 336 337 switch (cmd) { 338 case SIOCSIFADDR_IN6: 339 case SIOCSIFDSTADDR_IN6: 340 case SIOCSIFNETMASK_IN6: 341 /* 342 * Since IPv6 allows a node to assign multiple addresses 343 * on a single interface, SIOCSIFxxx ioctls are deprecated. 344 */ 345 /* we decided to obsolete this command (20000704) */ 346 error = EINVAL; 347 goto out; 348 349 case SIOCDIFADDR_IN6: 350 /* 351 * for IPv4, we look for existing in_ifaddr here to allow 352 * "ifconfig if0 delete" to remove the first IPv4 address on 353 * the interface. For IPv6, as the spec allows multiple 354 * interface address from the day one, we consider "remove the 355 * first one" semantics to be not preferable. 356 */ 357 if (ia == NULL) { 358 error = EADDRNOTAVAIL; 359 goto out; 360 } 361 /* FALLTHROUGH */ 362 case SIOCAIFADDR_IN6: 363 /* 364 * We always require users to specify a valid IPv6 address for 365 * the corresponding operation. 366 */ 367 if (ifra->ifra_addr.sin6_family != AF_INET6 || 368 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 369 error = EAFNOSUPPORT; 370 goto out; 371 } 372 373 if (td != NULL) { 374 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 375 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 376 if (error) 377 goto out; 378 } 379 break; 380 381 case SIOCGIFADDR_IN6: 382 /* This interface is basically deprecated. use SIOCGIFCONF. */ 383 /* FALLTHROUGH */ 384 case SIOCGIFAFLAG_IN6: 385 case SIOCGIFNETMASK_IN6: 386 case SIOCGIFDSTADDR_IN6: 387 case SIOCGIFALIFETIME_IN6: 388 /* must think again about its semantics */ 389 if (ia == NULL) { 390 error = EADDRNOTAVAIL; 391 goto out; 392 } 393 break; 394 395 case SIOCSIFALIFETIME_IN6: 396 { 397 struct in6_addrlifetime *lt; 398 399 if (td != NULL) { 400 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 401 if (error) 402 goto out; 403 } 404 if (ia == NULL) { 405 error = EADDRNOTAVAIL; 406 goto out; 407 } 408 /* sanity for overflow - beware unsigned */ 409 lt = &ifr->ifr_ifru.ifru_lifetime; 410 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 411 lt->ia6t_vltime + time_second < time_second) { 412 error = EINVAL; 413 goto out; 414 } 415 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 416 lt->ia6t_pltime + time_second < time_second) { 417 error = EINVAL; 418 goto out; 419 } 420 break; 421 } 422 } 423 424 switch (cmd) { 425 case SIOCGIFADDR_IN6: 426 ifr->ifr_addr = ia->ia_addr; 427 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 428 goto out; 429 break; 430 431 case SIOCGIFDSTADDR_IN6: 432 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 433 error = EINVAL; 434 goto out; 435 } 436 /* 437 * XXX: should we check if ifa_dstaddr is NULL and return 438 * an error? 439 */ 440 ifr->ifr_dstaddr = ia->ia_dstaddr; 441 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 442 goto out; 443 break; 444 445 case SIOCGIFNETMASK_IN6: 446 ifr->ifr_addr = ia->ia_prefixmask; 447 break; 448 449 case SIOCGIFAFLAG_IN6: 450 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 451 break; 452 453 case SIOCGIFSTAT_IN6: 454 if (ifp == NULL) { 455 error = EINVAL; 456 goto out; 457 } 458 bzero(&ifr->ifr_ifru.ifru_stat, 459 sizeof(ifr->ifr_ifru.ifru_stat)); 460 ifr->ifr_ifru.ifru_stat = 461 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat; 462 break; 463 464 case SIOCGIFSTAT_ICMP6: 465 if (ifp == NULL) { 466 error = EINVAL; 467 goto out; 468 } 469 bzero(&ifr->ifr_ifru.ifru_icmp6stat, 470 sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 471 ifr->ifr_ifru.ifru_icmp6stat = 472 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat; 473 break; 474 475 case SIOCGIFALIFETIME_IN6: 476 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 477 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 478 time_t maxexpire; 479 struct in6_addrlifetime *retlt = 480 &ifr->ifr_ifru.ifru_lifetime; 481 482 /* 483 * XXX: adjust expiration time assuming time_t is 484 * signed. 485 */ 486 maxexpire = (-1) & 487 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 488 if (ia->ia6_lifetime.ia6t_vltime < 489 maxexpire - ia->ia6_updatetime) { 490 retlt->ia6t_expire = ia->ia6_updatetime + 491 ia->ia6_lifetime.ia6t_vltime; 492 } else 493 retlt->ia6t_expire = maxexpire; 494 } 495 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 496 time_t maxexpire; 497 struct in6_addrlifetime *retlt = 498 &ifr->ifr_ifru.ifru_lifetime; 499 500 /* 501 * XXX: adjust expiration time assuming time_t is 502 * signed. 503 */ 504 maxexpire = (-1) & 505 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 506 if (ia->ia6_lifetime.ia6t_pltime < 507 maxexpire - ia->ia6_updatetime) { 508 retlt->ia6t_preferred = ia->ia6_updatetime + 509 ia->ia6_lifetime.ia6t_pltime; 510 } else 511 retlt->ia6t_preferred = maxexpire; 512 } 513 break; 514 515 case SIOCSIFALIFETIME_IN6: 516 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 517 /* for sanity */ 518 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 519 ia->ia6_lifetime.ia6t_expire = 520 time_second + ia->ia6_lifetime.ia6t_vltime; 521 } else 522 ia->ia6_lifetime.ia6t_expire = 0; 523 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 524 ia->ia6_lifetime.ia6t_preferred = 525 time_second + ia->ia6_lifetime.ia6t_pltime; 526 } else 527 ia->ia6_lifetime.ia6t_preferred = 0; 528 break; 529 530 case SIOCAIFADDR_IN6: 531 { 532 int i; 533 struct nd_prefixctl pr0; 534 struct nd_prefix *pr; 535 536 /* 537 * first, make or update the interface address structure, 538 * and link it to the list. 539 */ 540 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 541 goto out; 542 if (ia != NULL) 543 ifa_free(&ia->ia_ifa); 544 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 545 == NULL) { 546 /* 547 * this can happen when the user specify the 0 valid 548 * lifetime. 549 */ 550 break; 551 } 552 553 /* 554 * then, make the prefix on-link on the interface. 555 * XXX: we'd rather create the prefix before the address, but 556 * we need at least one address to install the corresponding 557 * interface route, so we configure the address first. 558 */ 559 560 /* 561 * convert mask to prefix length (prefixmask has already 562 * been validated in in6_update_ifa(). 563 */ 564 bzero(&pr0, sizeof(pr0)); 565 pr0.ndpr_ifp = ifp; 566 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 567 NULL); 568 if (pr0.ndpr_plen == 128) { 569 break; /* we don't need to install a host route. */ 570 } 571 pr0.ndpr_prefix = ifra->ifra_addr; 572 /* apply the mask for safety. */ 573 for (i = 0; i < 4; i++) { 574 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 575 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 576 } 577 /* 578 * XXX: since we don't have an API to set prefix (not address) 579 * lifetimes, we just use the same lifetimes as addresses. 580 * The (temporarily) installed lifetimes can be overridden by 581 * later advertised RAs (when accept_rtadv is non 0), which is 582 * an intended behavior. 583 */ 584 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 585 pr0.ndpr_raf_auto = 586 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 587 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 588 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 589 590 /* add the prefix if not yet. */ 591 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 592 /* 593 * nd6_prelist_add will install the corresponding 594 * interface route. 595 */ 596 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 597 goto out; 598 if (pr == NULL) { 599 log(LOG_ERR, "nd6_prelist_add succeeded but " 600 "no prefix\n"); 601 error = EINVAL; 602 goto out; 603 } 604 } 605 606 /* relate the address to the prefix */ 607 if (ia->ia6_ndpr == NULL) { 608 ia->ia6_ndpr = pr; 609 pr->ndpr_refcnt++; 610 611 /* 612 * If this is the first autoconf address from the 613 * prefix, create a temporary address as well 614 * (when required). 615 */ 616 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 617 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 618 int e; 619 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 620 log(LOG_NOTICE, "in6_control: failed " 621 "to create a temporary address, " 622 "errno=%d\n", e); 623 } 624 } 625 } 626 627 /* 628 * this might affect the status of autoconfigured addresses, 629 * that is, this address might make other addresses detached. 630 */ 631 pfxlist_onlink_check(); 632 if (error == 0 && ia) 633 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 634 break; 635 } 636 637 case SIOCDIFADDR_IN6: 638 { 639 struct nd_prefix *pr; 640 641 /* 642 * If the address being deleted is the only one that owns 643 * the corresponding prefix, expire the prefix as well. 644 * XXX: theoretically, we don't have to worry about such 645 * relationship, since we separate the address management 646 * and the prefix management. We do this, however, to provide 647 * as much backward compatibility as possible in terms of 648 * the ioctl operation. 649 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 650 */ 651 pr = ia->ia6_ndpr; 652 in6_purgeaddr(&ia->ia_ifa); 653 if (pr && pr->ndpr_refcnt == 0) 654 prelist_remove(pr); 655 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 656 break; 657 } 658 659 default: 660 if (ifp == NULL || ifp->if_ioctl == 0) { 661 error = EOPNOTSUPP; 662 goto out; 663 } 664 error = (*ifp->if_ioctl)(ifp, cmd, data); 665 goto out; 666 } 667 668 error = 0; 669out: 670 if (ia != NULL) 671 ifa_free(&ia->ia_ifa); 672 return (error); 673} 674 675/* 676 * Update parameters of an IPv6 interface address. 677 * If necessary, a new entry is created and linked into address chains. 678 * This function is separated from in6_control(). 679 * XXX: should this be performed under splnet()? 680 */ 681int 682in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 683 struct in6_ifaddr *ia, int flags) 684{ 685 INIT_VNET_INET6(ifp->if_vnet); 686 int error = 0, hostIsNew = 0, plen = -1; 687 struct sockaddr_in6 dst6; 688 struct in6_addrlifetime *lt; 689 struct in6_multi_mship *imm; 690 struct in6_multi *in6m_sol; 691 struct rtentry *rt; 692 int delay; 693 char ip6buf[INET6_ADDRSTRLEN]; 694 695 /* Validate parameters */ 696 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 697 return (EINVAL); 698 699 /* 700 * The destination address for a p2p link must have a family 701 * of AF_UNSPEC or AF_INET6. 702 */ 703 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 704 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 705 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 706 return (EAFNOSUPPORT); 707 /* 708 * validate ifra_prefixmask. don't check sin6_family, netmask 709 * does not carry fields other than sin6_len. 710 */ 711 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 712 return (EINVAL); 713 /* 714 * Because the IPv6 address architecture is classless, we require 715 * users to specify a (non 0) prefix length (mask) for a new address. 716 * We also require the prefix (when specified) mask is valid, and thus 717 * reject a non-consecutive mask. 718 */ 719 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 720 return (EINVAL); 721 if (ifra->ifra_prefixmask.sin6_len != 0) { 722 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 723 (u_char *)&ifra->ifra_prefixmask + 724 ifra->ifra_prefixmask.sin6_len); 725 if (plen <= 0) 726 return (EINVAL); 727 } else { 728 /* 729 * In this case, ia must not be NULL. We just use its prefix 730 * length. 731 */ 732 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 733 } 734 /* 735 * If the destination address on a p2p interface is specified, 736 * and the address is a scoped one, validate/set the scope 737 * zone identifier. 738 */ 739 dst6 = ifra->ifra_dstaddr; 740 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 741 (dst6.sin6_family == AF_INET6)) { 742 struct in6_addr in6_tmp; 743 u_int32_t zoneid; 744 745 in6_tmp = dst6.sin6_addr; 746 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 747 return (EINVAL); /* XXX: should be impossible */ 748 749 if (dst6.sin6_scope_id != 0) { 750 if (dst6.sin6_scope_id != zoneid) 751 return (EINVAL); 752 } else /* user omit to specify the ID. */ 753 dst6.sin6_scope_id = zoneid; 754 755 /* convert into the internal form */ 756 if (sa6_embedscope(&dst6, 0)) 757 return (EINVAL); /* XXX: should be impossible */ 758 } 759 /* 760 * The destination address can be specified only for a p2p or a 761 * loopback interface. If specified, the corresponding prefix length 762 * must be 128. 763 */ 764 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 765 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 766 /* XXX: noisy message */ 767 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 768 "be specified for a p2p or a loopback IF only\n")); 769 return (EINVAL); 770 } 771 if (plen != 128) { 772 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 773 "be 128 when dstaddr is specified\n")); 774 return (EINVAL); 775 } 776 } 777 /* lifetime consistency check */ 778 lt = &ifra->ifra_lifetime; 779 if (lt->ia6t_pltime > lt->ia6t_vltime) 780 return (EINVAL); 781 if (lt->ia6t_vltime == 0) { 782 /* 783 * the following log might be noisy, but this is a typical 784 * configuration mistake or a tool's bug. 785 */ 786 nd6log((LOG_INFO, 787 "in6_update_ifa: valid lifetime is 0 for %s\n", 788 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 789 790 if (ia == NULL) 791 return (0); /* there's nothing to do */ 792 } 793 794 /* 795 * If this is a new address, allocate a new ifaddr and link it 796 * into chains. 797 */ 798 if (ia == NULL) { 799 hostIsNew = 1; 800 /* 801 * When in6_update_ifa() is called in a process of a received 802 * RA, it is called under an interrupt context. So, we should 803 * call malloc with M_NOWAIT. 804 */ 805 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 806 M_NOWAIT); 807 if (ia == NULL) 808 return (ENOBUFS); 809 bzero((caddr_t)ia, sizeof(*ia)); 810 ifa_init(&ia->ia_ifa); 811 LIST_INIT(&ia->ia6_memberships); 812 /* Initialize the address and masks, and put time stamp */ 813 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 814 ia->ia_addr.sin6_family = AF_INET6; 815 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 816 ia->ia6_createtime = time_second; 817 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 818 /* 819 * XXX: some functions expect that ifa_dstaddr is not 820 * NULL for p2p interfaces. 821 */ 822 ia->ia_ifa.ifa_dstaddr = 823 (struct sockaddr *)&ia->ia_dstaddr; 824 } else { 825 ia->ia_ifa.ifa_dstaddr = NULL; 826 } 827 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 828 ia->ia_ifp = ifp; 829 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 830 IF_ADDR_LOCK(ifp); 831 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 832 IF_ADDR_UNLOCK(ifp); 833 834 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 835 IN6_IFADDR_WLOCK(); 836 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 837 IN6_IFADDR_WUNLOCK(); 838 } 839 840 /* update timestamp */ 841 ia->ia6_updatetime = time_second; 842 843 /* set prefix mask */ 844 if (ifra->ifra_prefixmask.sin6_len) { 845 /* 846 * We prohibit changing the prefix length of an existing 847 * address, because 848 * + such an operation should be rare in IPv6, and 849 * + the operation would confuse prefix management. 850 */ 851 if (ia->ia_prefixmask.sin6_len && 852 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 853 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 854 " existing (%s) address should not be changed\n", 855 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 856 error = EINVAL; 857 goto unlink; 858 } 859 ia->ia_prefixmask = ifra->ifra_prefixmask; 860 } 861 862 /* 863 * If a new destination address is specified, scrub the old one and 864 * install the new destination. Note that the interface must be 865 * p2p or loopback (see the check above.) 866 */ 867 if (dst6.sin6_family == AF_INET6 && 868 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 869 int e; 870 871 if ((ia->ia_flags & IFA_ROUTE) != 0 && 872 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 873 nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 874 "a route to the old destination: %s\n", 875 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 876 /* proceed anyway... */ 877 } else 878 ia->ia_flags &= ~IFA_ROUTE; 879 ia->ia_dstaddr = dst6; 880 } 881 882 /* 883 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 884 * to see if the address is deprecated or invalidated, but initialize 885 * these members for applications. 886 */ 887 ia->ia6_lifetime = ifra->ifra_lifetime; 888 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 889 ia->ia6_lifetime.ia6t_expire = 890 time_second + ia->ia6_lifetime.ia6t_vltime; 891 } else 892 ia->ia6_lifetime.ia6t_expire = 0; 893 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 894 ia->ia6_lifetime.ia6t_preferred = 895 time_second + ia->ia6_lifetime.ia6t_pltime; 896 } else 897 ia->ia6_lifetime.ia6t_preferred = 0; 898 899 /* reset the interface and routing table appropriately. */ 900 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 901 goto unlink; 902 903 /* 904 * configure address flags. 905 */ 906 ia->ia6_flags = ifra->ifra_flags; 907 /* 908 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 909 * userland, make it deprecated. 910 */ 911 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 912 ia->ia6_lifetime.ia6t_pltime = 0; 913 ia->ia6_lifetime.ia6t_preferred = time_second; 914 } 915 /* 916 * Make the address tentative before joining multicast addresses, 917 * so that corresponding MLD responses would not have a tentative 918 * source address. 919 */ 920 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 921 if (hostIsNew && in6if_do_dad(ifp)) 922 ia->ia6_flags |= IN6_IFF_TENTATIVE; 923 924 /* 925 * We are done if we have simply modified an existing address. 926 */ 927 if (!hostIsNew) 928 return (error); 929 930 /* 931 * Beyond this point, we should call in6_purgeaddr upon an error, 932 * not just go to unlink. 933 */ 934 935 /* Join necessary multicast groups */ 936 in6m_sol = NULL; 937 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 938 struct sockaddr_in6 mltaddr, mltmask; 939 struct in6_addr llsol; 940 941 /* join solicited multicast addr for new host id */ 942 bzero(&llsol, sizeof(struct in6_addr)); 943 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 944 llsol.s6_addr32[1] = 0; 945 llsol.s6_addr32[2] = htonl(1); 946 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 947 llsol.s6_addr8[12] = 0xff; 948 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 949 /* XXX: should not happen */ 950 log(LOG_ERR, "in6_update_ifa: " 951 "in6_setscope failed\n"); 952 goto cleanup; 953 } 954 delay = 0; 955 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 956 /* 957 * We need a random delay for DAD on the address 958 * being configured. It also means delaying 959 * transmission of the corresponding MLD report to 960 * avoid report collision. 961 * [draft-ietf-ipv6-rfc2462bis-02.txt] 962 */ 963 delay = arc4random() % 964 (MAX_RTR_SOLICITATION_DELAY * hz); 965 } 966 imm = in6_joingroup(ifp, &llsol, &error, delay); 967 if (imm == NULL) { 968 nd6log((LOG_WARNING, 969 "in6_update_ifa: addmulti failed for " 970 "%s on %s (errno=%d)\n", 971 ip6_sprintf(ip6buf, &llsol), if_name(ifp), 972 error)); 973 goto cleanup; 974 } 975 LIST_INSERT_HEAD(&ia->ia6_memberships, 976 imm, i6mm_chain); 977 in6m_sol = imm->i6mm_maddr; 978 979 bzero(&mltmask, sizeof(mltmask)); 980 mltmask.sin6_len = sizeof(struct sockaddr_in6); 981 mltmask.sin6_family = AF_INET6; 982 mltmask.sin6_addr = in6mask32; 983#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 984 985 /* 986 * join link-local all-nodes address 987 */ 988 bzero(&mltaddr, sizeof(mltaddr)); 989 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 990 mltaddr.sin6_family = AF_INET6; 991 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 992 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 993 0) 994 goto cleanup; /* XXX: should not fail */ 995 996 /* 997 * XXX: do we really need this automatic routes? 998 * We should probably reconsider this stuff. Most applications 999 * actually do not need the routes, since they usually specify 1000 * the outgoing interface. 1001 */ 1002 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1003 if (rt) { 1004 /* XXX: only works in !SCOPEDROUTING case. */ 1005 if (memcmp(&mltaddr.sin6_addr, 1006 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1007 MLTMASK_LEN)) { 1008 RTFREE_LOCKED(rt); 1009 rt = NULL; 1010 } 1011 } 1012 if (!rt) { 1013 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1014 (struct sockaddr *)&ia->ia_addr, 1015 (struct sockaddr *)&mltmask, RTF_UP, 1016 (struct rtentry **)0); 1017 if (error) 1018 goto cleanup; 1019 } else { 1020 RTFREE_LOCKED(rt); 1021 } 1022 1023 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1024 if (!imm) { 1025 nd6log((LOG_WARNING, 1026 "in6_update_ifa: addmulti failed for " 1027 "%s on %s (errno=%d)\n", 1028 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1029 if_name(ifp), error)); 1030 goto cleanup; 1031 } 1032 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1033 1034 /* 1035 * join node information group address 1036 */ 1037 delay = 0; 1038 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1039 /* 1040 * The spec doesn't say anything about delay for this 1041 * group, but the same logic should apply. 1042 */ 1043 delay = arc4random() % 1044 (MAX_RTR_SOLICITATION_DELAY * hz); 1045 } 1046 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 1047 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 1048 delay); /* XXX jinmei */ 1049 if (!imm) { 1050 nd6log((LOG_WARNING, "in6_update_ifa: " 1051 "addmulti failed for %s on %s " 1052 "(errno=%d)\n", 1053 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1054 if_name(ifp), error)); 1055 /* XXX not very fatal, go on... */ 1056 } else { 1057 LIST_INSERT_HEAD(&ia->ia6_memberships, 1058 imm, i6mm_chain); 1059 } 1060 } 1061 1062 /* 1063 * join interface-local all-nodes address. 1064 * (ff01::1%ifN, and ff01::%ifN/32) 1065 */ 1066 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1067 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) 1068 != 0) 1069 goto cleanup; /* XXX: should not fail */ 1070 /* XXX: again, do we really need the route? */ 1071 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1072 if (rt) { 1073 if (memcmp(&mltaddr.sin6_addr, 1074 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1075 MLTMASK_LEN)) { 1076 RTFREE_LOCKED(rt); 1077 rt = NULL; 1078 } 1079 } 1080 if (!rt) { 1081 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1082 (struct sockaddr *)&ia->ia_addr, 1083 (struct sockaddr *)&mltmask, RTF_UP, 1084 (struct rtentry **)0); 1085 if (error) 1086 goto cleanup; 1087 } else 1088 RTFREE_LOCKED(rt); 1089 1090 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1091 if (!imm) { 1092 nd6log((LOG_WARNING, "in6_update_ifa: " 1093 "addmulti failed for %s on %s " 1094 "(errno=%d)\n", 1095 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1096 if_name(ifp), error)); 1097 goto cleanup; 1098 } 1099 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1100#undef MLTMASK_LEN 1101 } 1102 1103 /* 1104 * Perform DAD, if needed. 1105 * XXX It may be of use, if we can administratively 1106 * disable DAD. 1107 */ 1108 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1109 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1110 { 1111 int mindelay, maxdelay; 1112 1113 delay = 0; 1114 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1115 /* 1116 * We need to impose a delay before sending an NS 1117 * for DAD. Check if we also needed a delay for the 1118 * corresponding MLD message. If we did, the delay 1119 * should be larger than the MLD delay (this could be 1120 * relaxed a bit, but this simple logic is at least 1121 * safe). 1122 * XXX: Break data hiding guidelines and look at 1123 * state for the solicited multicast group. 1124 */ 1125 mindelay = 0; 1126 if (in6m_sol != NULL && 1127 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1128 mindelay = in6m_sol->in6m_timer; 1129 } 1130 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1131 if (maxdelay - mindelay == 0) 1132 delay = 0; 1133 else { 1134 delay = 1135 (arc4random() % (maxdelay - mindelay)) + 1136 mindelay; 1137 } 1138 } 1139 nd6_dad_start((struct ifaddr *)ia, delay); 1140 } 1141 1142 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1143 ifa_free(&ia->ia_ifa); 1144 return (error); 1145 1146 unlink: 1147 /* 1148 * XXX: if a change of an existing address failed, keep the entry 1149 * anyway. 1150 */ 1151 if (hostIsNew) { 1152 in6_unlink_ifa(ia, ifp); 1153 ifa_free(&ia->ia_ifa); 1154 } 1155 return (error); 1156 1157 cleanup: 1158 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1159 ifa_free(&ia->ia_ifa); 1160 in6_purgeaddr(&ia->ia_ifa); 1161 return error; 1162} 1163 1164void 1165in6_purgeaddr(struct ifaddr *ifa) 1166{ 1167 struct ifnet *ifp = ifa->ifa_ifp; 1168 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1169 struct in6_multi_mship *imm; 1170 struct sockaddr_in6 mltaddr, mltmask; 1171 struct rtentry rt0; 1172 struct sockaddr_dl gateway; 1173 struct sockaddr_in6 mask, addr; 1174 int plen, error; 1175 struct rtentry *rt; 1176 struct ifaddr *ifa0, *nifa; 1177 1178 /* 1179 * find another IPv6 address as the gateway for the 1180 * link-local and node-local all-nodes multicast 1181 * address routes 1182 */ 1183 IF_ADDR_LOCK(ifp); 1184 TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) { 1185 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1186 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1187 &ia->ia_addr.sin6_addr, 1188 sizeof(struct in6_addr)) == 0) 1189 continue; 1190 else 1191 break; 1192 } 1193 if (ifa0 != NULL) 1194 ifa_ref(ifa0); 1195 IF_ADDR_UNLOCK(ifp); 1196 1197 if (!(ia->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT))) { 1198 struct rt_addrinfo info; 1199 struct sockaddr_dl null_sdl; 1200 1201 bzero(&null_sdl, sizeof(null_sdl)); 1202 null_sdl.sdl_len = sizeof(null_sdl); 1203 null_sdl.sdl_family = AF_LINK; 1204 null_sdl.sdl_type = V_loif->if_type; 1205 null_sdl.sdl_index = V_loif->if_index; 1206 bzero(&info, sizeof(info)); 1207 info.rti_flags = ia->ia_flags | RTF_HOST | RTF_STATIC; 1208 info.rti_info[RTAX_DST] = (struct sockaddr *)&ia->ia_addr; 1209 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1210 error = rtrequest1_fib(RTM_DELETE, &info, NULL, 0); 1211 1212 if (error != 0) 1213 log(LOG_INFO, "in6_purgeaddr: deletion failed\n"); 1214 } 1215 1216 /* stop DAD processing */ 1217 nd6_dad_stop(ifa); 1218 1219 IF_AFDATA_LOCK(ifp); 1220 lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR), 1221 (struct sockaddr *)&ia->ia_addr); 1222 IF_AFDATA_UNLOCK(ifp); 1223 1224 /* 1225 * initialize for rtmsg generation 1226 */ 1227 bzero(&gateway, sizeof(gateway)); 1228 gateway.sdl_len = sizeof(gateway); 1229 gateway.sdl_family = AF_LINK; 1230 gateway.sdl_nlen = 0; 1231 gateway.sdl_alen = ifp->if_addrlen; 1232 /* */ 1233 bzero(&rt0, sizeof(rt0)); 1234 rt0.rt_gateway = (struct sockaddr *)&gateway; 1235 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1236 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1237 rt_mask(&rt0) = (struct sockaddr *)&mask; 1238 rt_key(&rt0) = (struct sockaddr *)&addr; 1239 rt0.rt_flags = RTF_HOST | RTF_STATIC; 1240 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0); 1241 1242 /* 1243 * leave from multicast groups we have joined for the interface 1244 */ 1245 while ((imm = ia->ia6_memberships.lh_first) != NULL) { 1246 LIST_REMOVE(imm, i6mm_chain); 1247 in6_leavegroup(imm); 1248 } 1249 1250 /* 1251 * remove the link-local all-nodes address 1252 */ 1253 bzero(&mltmask, sizeof(mltmask)); 1254 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1255 mltmask.sin6_family = AF_INET6; 1256 mltmask.sin6_addr = in6mask32; 1257 1258 bzero(&mltaddr, sizeof(mltaddr)); 1259 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1260 mltaddr.sin6_family = AF_INET6; 1261 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1262 1263 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1264 0) 1265 goto cleanup; 1266 1267 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1268 if (rt != NULL && rt->rt_gateway != NULL && 1269 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1270 &ia->ia_addr.sin6_addr, 1271 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1272 /* 1273 * if no more IPv6 address exists on this interface 1274 * then remove the multicast address route 1275 */ 1276 if (ifa0 == NULL) { 1277 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1278 sizeof(mltaddr.sin6_addr)); 1279 RTFREE_LOCKED(rt); 1280 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1281 (struct sockaddr *)&ia->ia_addr, 1282 (struct sockaddr *)&mltmask, RTF_UP, 1283 (struct rtentry **)0); 1284 if (error) 1285 log(LOG_INFO, "in6_purgeaddr: link-local all-nodes" 1286 "multicast address deletion error\n"); 1287 } else { 1288 /* 1289 * replace the gateway of the route 1290 */ 1291 struct sockaddr_in6 sa; 1292 1293 bzero(&sa, sizeof(sa)); 1294 sa.sin6_len = sizeof(struct sockaddr_in6); 1295 sa.sin6_family = AF_INET6; 1296 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1297 sizeof(sa.sin6_addr)); 1298 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1299 memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1300 RTFREE_LOCKED(rt); 1301 } 1302 } else { 1303 if (rt != NULL) 1304 RTFREE_LOCKED(rt); 1305 } 1306 1307 /* 1308 * remove the node-local all-nodes address 1309 */ 1310 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1311 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1312 0) 1313 goto cleanup; 1314 1315 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1316 if (rt != NULL && rt->rt_gateway != NULL && 1317 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1318 &ia->ia_addr.sin6_addr, 1319 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1320 /* 1321 * if no more IPv6 address exists on this interface 1322 * then remove the multicast address route 1323 */ 1324 if (ifa0 == NULL) { 1325 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1326 sizeof(mltaddr.sin6_addr)); 1327 1328 RTFREE_LOCKED(rt); 1329 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1330 (struct sockaddr *)&ia->ia_addr, 1331 (struct sockaddr *)&mltmask, RTF_UP, 1332 (struct rtentry **)0); 1333 1334 if (error) 1335 log(LOG_INFO, "in6_purgeaddr: node-local all-nodes" 1336 "multicast address deletion error\n"); 1337 } else { 1338 /* 1339 * replace the gateway of the route 1340 */ 1341 struct sockaddr_in6 sa; 1342 1343 bzero(&sa, sizeof(sa)); 1344 sa.sin6_len = sizeof(struct sockaddr_in6); 1345 sa.sin6_family = AF_INET6; 1346 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1347 sizeof(sa.sin6_addr)); 1348 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1349 memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1350 RTFREE_LOCKED(rt); 1351 } 1352 } else { 1353 if (rt != NULL) 1354 RTFREE_LOCKED(rt); 1355 } 1356 1357cleanup: 1358 1359 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1360 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1361 int error; 1362 struct sockaddr *dstaddr; 1363 1364 /* 1365 * use the interface address if configuring an 1366 * interface address with a /128 prefix len 1367 */ 1368 if (ia->ia_dstaddr.sin6_family == AF_INET6) 1369 dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 1370 else 1371 dstaddr = (struct sockaddr *)&ia->ia_addr; 1372 1373 error = rtrequest(RTM_DELETE, 1374 (struct sockaddr *)dstaddr, 1375 (struct sockaddr *)&ia->ia_addr, 1376 (struct sockaddr *)&ia->ia_prefixmask, 1377 ia->ia_flags | RTF_HOST, NULL); 1378 if (error != 0) 1379 return; 1380 ia->ia_flags &= ~IFA_ROUTE; 1381 } 1382 if (ifa0 != NULL) 1383 ifa_free(ifa0); 1384 1385 in6_unlink_ifa(ia, ifp); 1386} 1387 1388static void 1389in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1390{ 1391 INIT_VNET_INET6(ifp->if_vnet); 1392 int s = splnet(); 1393 1394 IF_ADDR_LOCK(ifp); 1395 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1396 IF_ADDR_UNLOCK(ifp); 1397 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1398 1399 /* 1400 * Defer the release of what might be the last reference to the 1401 * in6_ifaddr so that it can't be freed before the remainder of the 1402 * cleanup. 1403 */ 1404 IN6_IFADDR_WLOCK(); 1405 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1406 IN6_IFADDR_WUNLOCK(); 1407 1408 /* 1409 * Release the reference to the base prefix. There should be a 1410 * positive reference. 1411 */ 1412 if (ia->ia6_ndpr == NULL) { 1413 nd6log((LOG_NOTICE, 1414 "in6_unlink_ifa: autoconf'ed address " 1415 "%p has no prefix\n", ia)); 1416 } else { 1417 ia->ia6_ndpr->ndpr_refcnt--; 1418 ia->ia6_ndpr = NULL; 1419 } 1420 1421 /* 1422 * Also, if the address being removed is autoconf'ed, call 1423 * pfxlist_onlink_check() since the release might affect the status of 1424 * other (detached) addresses. 1425 */ 1426 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1427 pfxlist_onlink_check(); 1428 } 1429 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1430 splx(s); 1431} 1432 1433void 1434in6_purgeif(struct ifnet *ifp) 1435{ 1436 struct ifaddr *ifa, *nifa; 1437 1438 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1439 if (ifa->ifa_addr->sa_family != AF_INET6) 1440 continue; 1441 in6_purgeaddr(ifa); 1442 } 1443 1444 in6_ifdetach(ifp); 1445} 1446 1447/* 1448 * SIOC[GAD]LIFADDR. 1449 * SIOCGLIFADDR: get first address. (?) 1450 * SIOCGLIFADDR with IFLR_PREFIX: 1451 * get first address that matches the specified prefix. 1452 * SIOCALIFADDR: add the specified address. 1453 * SIOCALIFADDR with IFLR_PREFIX: 1454 * add the specified prefix, filling hostid part from 1455 * the first link-local address. prefixlen must be <= 64. 1456 * SIOCDLIFADDR: delete the specified address. 1457 * SIOCDLIFADDR with IFLR_PREFIX: 1458 * delete the first address that matches the specified prefix. 1459 * return values: 1460 * EINVAL on invalid parameters 1461 * EADDRNOTAVAIL on prefix match failed/specified address not found 1462 * other values may be returned from in6_ioctl() 1463 * 1464 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1465 * this is to accomodate address naming scheme other than RFC2374, 1466 * in the future. 1467 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1468 * address encoding scheme. (see figure on page 8) 1469 */ 1470static int 1471in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1472 struct ifnet *ifp, struct thread *td) 1473{ 1474 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1475 struct ifaddr *ifa; 1476 struct sockaddr *sa; 1477 1478 /* sanity checks */ 1479 if (!data || !ifp) { 1480 panic("invalid argument to in6_lifaddr_ioctl"); 1481 /* NOTREACHED */ 1482 } 1483 1484 switch (cmd) { 1485 case SIOCGLIFADDR: 1486 /* address must be specified on GET with IFLR_PREFIX */ 1487 if ((iflr->flags & IFLR_PREFIX) == 0) 1488 break; 1489 /* FALLTHROUGH */ 1490 case SIOCALIFADDR: 1491 case SIOCDLIFADDR: 1492 /* address must be specified on ADD and DELETE */ 1493 sa = (struct sockaddr *)&iflr->addr; 1494 if (sa->sa_family != AF_INET6) 1495 return EINVAL; 1496 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1497 return EINVAL; 1498 /* XXX need improvement */ 1499 sa = (struct sockaddr *)&iflr->dstaddr; 1500 if (sa->sa_family && sa->sa_family != AF_INET6) 1501 return EINVAL; 1502 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1503 return EINVAL; 1504 break; 1505 default: /* shouldn't happen */ 1506#if 0 1507 panic("invalid cmd to in6_lifaddr_ioctl"); 1508 /* NOTREACHED */ 1509#else 1510 return EOPNOTSUPP; 1511#endif 1512 } 1513 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1514 return EINVAL; 1515 1516 switch (cmd) { 1517 case SIOCALIFADDR: 1518 { 1519 struct in6_aliasreq ifra; 1520 struct in6_addr *hostid = NULL; 1521 int prefixlen; 1522 1523 ifa = NULL; 1524 if ((iflr->flags & IFLR_PREFIX) != 0) { 1525 struct sockaddr_in6 *sin6; 1526 1527 /* 1528 * hostid is to fill in the hostid part of the 1529 * address. hostid points to the first link-local 1530 * address attached to the interface. 1531 */ 1532 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1533 if (!ifa) 1534 return EADDRNOTAVAIL; 1535 hostid = IFA_IN6(ifa); 1536 1537 /* prefixlen must be <= 64. */ 1538 if (64 < iflr->prefixlen) 1539 return EINVAL; 1540 prefixlen = iflr->prefixlen; 1541 1542 /* hostid part must be zero. */ 1543 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1544 if (sin6->sin6_addr.s6_addr32[2] != 0 || 1545 sin6->sin6_addr.s6_addr32[3] != 0) { 1546 return EINVAL; 1547 } 1548 } else 1549 prefixlen = iflr->prefixlen; 1550 1551 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1552 bzero(&ifra, sizeof(ifra)); 1553 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 1554 1555 bcopy(&iflr->addr, &ifra.ifra_addr, 1556 ((struct sockaddr *)&iflr->addr)->sa_len); 1557 if (hostid) { 1558 /* fill in hostid part */ 1559 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1560 hostid->s6_addr32[2]; 1561 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1562 hostid->s6_addr32[3]; 1563 } 1564 1565 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 1566 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1567 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1568 if (hostid) { 1569 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1570 hostid->s6_addr32[2]; 1571 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1572 hostid->s6_addr32[3]; 1573 } 1574 } 1575 if (ifa != NULL) 1576 ifa_free(ifa); 1577 1578 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1579 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1580 1581 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1582 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1583 } 1584 case SIOCGLIFADDR: 1585 case SIOCDLIFADDR: 1586 { 1587 struct in6_ifaddr *ia; 1588 struct in6_addr mask, candidate, match; 1589 struct sockaddr_in6 *sin6; 1590 int cmp; 1591 1592 bzero(&mask, sizeof(mask)); 1593 if (iflr->flags & IFLR_PREFIX) { 1594 /* lookup a prefix rather than address. */ 1595 in6_prefixlen2mask(&mask, iflr->prefixlen); 1596 1597 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1598 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1599 match.s6_addr32[0] &= mask.s6_addr32[0]; 1600 match.s6_addr32[1] &= mask.s6_addr32[1]; 1601 match.s6_addr32[2] &= mask.s6_addr32[2]; 1602 match.s6_addr32[3] &= mask.s6_addr32[3]; 1603 1604 /* if you set extra bits, that's wrong */ 1605 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1606 return EINVAL; 1607 1608 cmp = 1; 1609 } else { 1610 if (cmd == SIOCGLIFADDR) { 1611 /* on getting an address, take the 1st match */ 1612 cmp = 0; /* XXX */ 1613 } else { 1614 /* on deleting an address, do exact match */ 1615 in6_prefixlen2mask(&mask, 128); 1616 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1617 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1618 1619 cmp = 1; 1620 } 1621 } 1622 1623 IF_ADDR_LOCK(ifp); 1624 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1625 if (ifa->ifa_addr->sa_family != AF_INET6) 1626 continue; 1627 if (!cmp) 1628 break; 1629 1630 /* 1631 * XXX: this is adhoc, but is necessary to allow 1632 * a user to specify fe80::/64 (not /10) for a 1633 * link-local address. 1634 */ 1635 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1636 in6_clearscope(&candidate); 1637 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1638 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1639 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1640 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1641 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1642 break; 1643 } 1644 IF_ADDR_UNLOCK(ifp); 1645 if (!ifa) 1646 return EADDRNOTAVAIL; 1647 ia = ifa2ia6(ifa); 1648 1649 if (cmd == SIOCGLIFADDR) { 1650 int error; 1651 1652 /* fill in the if_laddrreq structure */ 1653 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1654 error = sa6_recoverscope( 1655 (struct sockaddr_in6 *)&iflr->addr); 1656 if (error != 0) 1657 return (error); 1658 1659 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1660 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1661 ia->ia_dstaddr.sin6_len); 1662 error = sa6_recoverscope( 1663 (struct sockaddr_in6 *)&iflr->dstaddr); 1664 if (error != 0) 1665 return (error); 1666 } else 1667 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1668 1669 iflr->prefixlen = 1670 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1671 1672 iflr->flags = ia->ia6_flags; /* XXX */ 1673 1674 return 0; 1675 } else { 1676 struct in6_aliasreq ifra; 1677 1678 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1679 bzero(&ifra, sizeof(ifra)); 1680 bcopy(iflr->iflr_name, ifra.ifra_name, 1681 sizeof(ifra.ifra_name)); 1682 1683 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1684 ia->ia_addr.sin6_len); 1685 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1686 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1687 ia->ia_dstaddr.sin6_len); 1688 } else { 1689 bzero(&ifra.ifra_dstaddr, 1690 sizeof(ifra.ifra_dstaddr)); 1691 } 1692 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1693 ia->ia_prefixmask.sin6_len); 1694 1695 ifra.ifra_flags = ia->ia6_flags; 1696 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1697 ifp, td); 1698 } 1699 } 1700 } 1701 1702 return EOPNOTSUPP; /* just for safety */ 1703} 1704 1705/* 1706 * Initialize an interface's intetnet6 address 1707 * and routing table entry. 1708 */ 1709static int 1710in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1711 struct sockaddr_in6 *sin6, int newhost) 1712{ 1713 int error = 0, plen, ifacount = 0; 1714 int s = splimp(); 1715 struct ifaddr *ifa; 1716 1717 /* 1718 * Give the interface a chance to initialize 1719 * if this is its first address, 1720 * and to validate the address if necessary. 1721 */ 1722 IF_ADDR_LOCK(ifp); 1723 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1724 if (ifa->ifa_addr->sa_family != AF_INET6) 1725 continue; 1726 ifacount++; 1727 } 1728 IF_ADDR_UNLOCK(ifp); 1729 1730 ia->ia_addr = *sin6; 1731 1732 if (ifacount <= 1 && ifp->if_ioctl) { 1733 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1734 if (error) { 1735 splx(s); 1736 return (error); 1737 } 1738 } 1739 splx(s); 1740 1741 ia->ia_ifa.ifa_metric = ifp->if_metric; 1742 1743 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1744 1745 /* 1746 * Special case: 1747 * If a new destination address is specified for a point-to-point 1748 * interface, install a route to the destination as an interface 1749 * direct route. 1750 * XXX: the logic below rejects assigning multiple addresses on a p2p 1751 * interface that share the same destination. 1752 */ 1753 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1754 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128) { 1755 struct sockaddr *dstaddr; 1756 int rtflags = RTF_UP | RTF_HOST; 1757 1758 /* 1759 * use the interface address if configuring an 1760 * interface address with a /128 prefix len 1761 */ 1762 if (ia->ia_dstaddr.sin6_family == AF_INET6) 1763 dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 1764 else 1765 dstaddr = (struct sockaddr *)&ia->ia_addr; 1766 1767 error = rtrequest(RTM_ADD, 1768 (struct sockaddr *)dstaddr, 1769 (struct sockaddr *)&ia->ia_addr, 1770 (struct sockaddr *)&ia->ia_prefixmask, 1771 ia->ia_flags | rtflags, NULL); 1772 if (error != 0) 1773 return (error); 1774 ia->ia_flags |= IFA_ROUTE; 1775 } 1776 1777 /* 1778 * add a loopback route to self 1779 */ 1780 if (!(ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT))) { 1781 struct rt_addrinfo info; 1782 struct rtentry *rt = NULL; 1783 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1784 1785 bzero(&info, sizeof(info)); 1786 info.rti_ifp = V_loif; 1787 info.rti_flags = ia->ia_flags | RTF_HOST | RTF_STATIC; 1788 info.rti_info[RTAX_DST] = (struct sockaddr *)&ia->ia_addr; 1789 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1790 error = rtrequest1_fib(RTM_ADD, &info, &rt, 0); 1791 1792 if (error == 0 && rt != NULL) { 1793 RT_LOCK(rt); 1794 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1795 rt->rt_ifp->if_type; 1796 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1797 rt->rt_ifp->if_index; 1798 RT_REMREF(rt); 1799 RT_UNLOCK(rt); 1800 } else if (error != 0) 1801 log(LOG_INFO, "in6_ifinit: insertion failed\n"); 1802 } 1803 1804 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1805 if (newhost) { 1806 struct llentry *ln; 1807 struct rtentry rt; 1808 struct sockaddr_dl gateway; 1809 struct sockaddr_in6 mask, addr; 1810 1811 IF_AFDATA_LOCK(ifp); 1812 ia->ia_ifa.ifa_rtrequest = NULL; 1813 1814 /* XXX QL 1815 * we need to report rt_newaddrmsg 1816 */ 1817 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE), 1818 (struct sockaddr *)&ia->ia_addr); 1819 IF_AFDATA_UNLOCK(ifp); 1820 if (ln != NULL) { 1821 ln->la_expire = 0; /* for IPv6 this means permanent */ 1822 ln->ln_state = ND6_LLINFO_REACHABLE; 1823 /* 1824 * initialize for rtmsg generation 1825 */ 1826 bzero(&gateway, sizeof(gateway)); 1827 gateway.sdl_len = sizeof(gateway); 1828 gateway.sdl_family = AF_LINK; 1829 gateway.sdl_nlen = 0; 1830 gateway.sdl_alen = 6; 1831 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr)); 1832 /* */ 1833 LLE_WUNLOCK(ln); 1834 } 1835 1836 bzero(&rt, sizeof(rt)); 1837 rt.rt_gateway = (struct sockaddr *)&gateway; 1838 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1839 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1840 rt_mask(&rt) = (struct sockaddr *)&mask; 1841 rt_key(&rt) = (struct sockaddr *)&addr; 1842 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 1843 rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt); 1844 } 1845 1846 return (error); 1847} 1848 1849/* 1850 * Find an IPv6 interface link-local address specific to an interface. 1851 * ifaddr is returned referenced. 1852 */ 1853struct in6_ifaddr * 1854in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1855{ 1856 struct ifaddr *ifa; 1857 1858 IF_ADDR_LOCK(ifp); 1859 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1860 if (ifa->ifa_addr->sa_family != AF_INET6) 1861 continue; 1862 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1863 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1864 ignoreflags) != 0) 1865 continue; 1866 ifa_ref(ifa); 1867 break; 1868 } 1869 } 1870 IF_ADDR_UNLOCK(ifp); 1871 1872 return ((struct in6_ifaddr *)ifa); 1873} 1874 1875 1876/* 1877 * find the internet address corresponding to a given interface and address. 1878 * ifaddr is returned referenced. 1879 */ 1880struct in6_ifaddr * 1881in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1882{ 1883 struct ifaddr *ifa; 1884 1885 IF_ADDR_LOCK(ifp); 1886 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1887 if (ifa->ifa_addr->sa_family != AF_INET6) 1888 continue; 1889 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1890 ifa_ref(ifa); 1891 break; 1892 } 1893 } 1894 IF_ADDR_UNLOCK(ifp); 1895 1896 return ((struct in6_ifaddr *)ifa); 1897} 1898 1899/* 1900 * Convert IP6 address to printable (loggable) representation. Caller 1901 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1902 */ 1903static char digits[] = "0123456789abcdef"; 1904char * 1905ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1906{ 1907 int i; 1908 char *cp; 1909 const u_int16_t *a = (const u_int16_t *)addr; 1910 const u_int8_t *d; 1911 int dcolon = 0, zero = 0; 1912 1913 cp = ip6buf; 1914 1915 for (i = 0; i < 8; i++) { 1916 if (dcolon == 1) { 1917 if (*a == 0) { 1918 if (i == 7) 1919 *cp++ = ':'; 1920 a++; 1921 continue; 1922 } else 1923 dcolon = 2; 1924 } 1925 if (*a == 0) { 1926 if (dcolon == 0 && *(a + 1) == 0) { 1927 if (i == 0) 1928 *cp++ = ':'; 1929 *cp++ = ':'; 1930 dcolon = 1; 1931 } else { 1932 *cp++ = '0'; 1933 *cp++ = ':'; 1934 } 1935 a++; 1936 continue; 1937 } 1938 d = (const u_char *)a; 1939 /* Try to eliminate leading zeros in printout like in :0001. */ 1940 zero = 1; 1941 *cp = digits[*d >> 4]; 1942 if (*cp != '0') { 1943 zero = 0; 1944 cp++; 1945 } 1946 *cp = digits[*d++ & 0xf]; 1947 if (zero == 0 || (*cp != '0')) { 1948 zero = 0; 1949 cp++; 1950 } 1951 *cp = digits[*d >> 4]; 1952 if (zero == 0 || (*cp != '0')) { 1953 zero = 0; 1954 cp++; 1955 } 1956 *cp++ = digits[*d & 0xf]; 1957 *cp++ = ':'; 1958 a++; 1959 } 1960 *--cp = '\0'; 1961 return (ip6buf); 1962} 1963 1964int 1965in6_localaddr(struct in6_addr *in6) 1966{ 1967 INIT_VNET_INET6(curvnet); 1968 struct in6_ifaddr *ia; 1969 1970 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1971 return 1; 1972 1973 IN6_IFADDR_RLOCK(); 1974 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1975 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1976 &ia->ia_prefixmask.sin6_addr)) { 1977 IN6_IFADDR_RUNLOCK(); 1978 return 1; 1979 } 1980 } 1981 IN6_IFADDR_RUNLOCK(); 1982 1983 return (0); 1984} 1985 1986int 1987in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1988{ 1989 INIT_VNET_INET6(curvnet); 1990 struct in6_ifaddr *ia; 1991 1992 IN6_IFADDR_RLOCK(); 1993 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1994 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 1995 &sa6->sin6_addr) && 1996 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { 1997 IN6_IFADDR_RUNLOCK(); 1998 return (1); /* true */ 1999 } 2000 2001 /* XXX: do we still have to go thru the rest of the list? */ 2002 } 2003 IN6_IFADDR_RUNLOCK(); 2004 2005 return (0); /* false */ 2006} 2007 2008/* 2009 * return length of part which dst and src are equal 2010 * hard coding... 2011 */ 2012int 2013in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 2014{ 2015 int match = 0; 2016 u_char *s = (u_char *)src, *d = (u_char *)dst; 2017 u_char *lim = s + 16, r; 2018 2019 while (s < lim) 2020 if ((r = (*d++ ^ *s++)) != 0) { 2021 while (r < 128) { 2022 match++; 2023 r <<= 1; 2024 } 2025 break; 2026 } else 2027 match += 8; 2028 return match; 2029} 2030 2031/* XXX: to be scope conscious */ 2032int 2033in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 2034{ 2035 int bytelen, bitlen; 2036 2037 /* sanity check */ 2038 if (0 > len || len > 128) { 2039 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 2040 len); 2041 return (0); 2042 } 2043 2044 bytelen = len / 8; 2045 bitlen = len % 8; 2046 2047 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2048 return (0); 2049 if (bitlen != 0 && 2050 p1->s6_addr[bytelen] >> (8 - bitlen) != 2051 p2->s6_addr[bytelen] >> (8 - bitlen)) 2052 return (0); 2053 2054 return (1); 2055} 2056 2057void 2058in6_prefixlen2mask(struct in6_addr *maskp, int len) 2059{ 2060 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 2061 int bytelen, bitlen, i; 2062 2063 /* sanity check */ 2064 if (0 > len || len > 128) { 2065 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 2066 len); 2067 return; 2068 } 2069 2070 bzero(maskp, sizeof(*maskp)); 2071 bytelen = len / 8; 2072 bitlen = len % 8; 2073 for (i = 0; i < bytelen; i++) 2074 maskp->s6_addr[i] = 0xff; 2075 if (bitlen) 2076 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2077} 2078 2079/* 2080 * return the best address out of the same scope. if no address was 2081 * found, return the first valid address from designated IF. 2082 */ 2083struct in6_ifaddr * 2084in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2085{ 2086 INIT_VNET_INET6(curvnet); 2087 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2088 struct ifaddr *ifa; 2089 struct in6_ifaddr *besta = 0; 2090 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2091 2092 dep[0] = dep[1] = NULL; 2093 2094 /* 2095 * We first look for addresses in the same scope. 2096 * If there is one, return it. 2097 * If two or more, return one which matches the dst longest. 2098 * If none, return one of global addresses assigned other ifs. 2099 */ 2100 IF_ADDR_LOCK(ifp); 2101 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2102 if (ifa->ifa_addr->sa_family != AF_INET6) 2103 continue; 2104 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2105 continue; /* XXX: is there any case to allow anycast? */ 2106 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2107 continue; /* don't use this interface */ 2108 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2109 continue; 2110 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2111 if (V_ip6_use_deprecated) 2112 dep[0] = (struct in6_ifaddr *)ifa; 2113 continue; 2114 } 2115 2116 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2117 /* 2118 * call in6_matchlen() as few as possible 2119 */ 2120 if (besta) { 2121 if (blen == -1) 2122 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2123 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2124 if (tlen > blen) { 2125 blen = tlen; 2126 besta = (struct in6_ifaddr *)ifa; 2127 } 2128 } else 2129 besta = (struct in6_ifaddr *)ifa; 2130 } 2131 } 2132 if (besta) { 2133 ifa_ref(&besta->ia_ifa); 2134 IF_ADDR_UNLOCK(ifp); 2135 return (besta); 2136 } 2137 IF_ADDR_UNLOCK(ifp); 2138 2139 IN6_IFADDR_RLOCK(); 2140 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2141 if (ifa->ifa_addr->sa_family != AF_INET6) 2142 continue; 2143 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2144 continue; /* XXX: is there any case to allow anycast? */ 2145 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2146 continue; /* don't use this interface */ 2147 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2148 continue; 2149 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2150 if (V_ip6_use_deprecated) 2151 dep[1] = (struct in6_ifaddr *)ifa; 2152 continue; 2153 } 2154 2155 if (ifa != NULL) 2156 ifa_ref(ifa); 2157 IN6_IFADDR_RUNLOCK(); 2158 return (struct in6_ifaddr *)ifa; 2159 } 2160 IN6_IFADDR_RUNLOCK(); 2161 2162 /* use the last-resort values, that are, deprecated addresses */ 2163 if (dep[0]) 2164 return dep[0]; 2165 if (dep[1]) 2166 return dep[1]; 2167 2168 return NULL; 2169} 2170 2171/* 2172 * perform DAD when interface becomes IFF_UP. 2173 */ 2174void 2175in6_if_up(struct ifnet *ifp) 2176{ 2177 struct ifaddr *ifa; 2178 struct in6_ifaddr *ia; 2179 2180 IF_ADDR_LOCK(ifp); 2181 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2182 if (ifa->ifa_addr->sa_family != AF_INET6) 2183 continue; 2184 ia = (struct in6_ifaddr *)ifa; 2185 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2186 /* 2187 * The TENTATIVE flag was likely set by hand 2188 * beforehand, implicitly indicating the need for DAD. 2189 * We may be able to skip the random delay in this 2190 * case, but we impose delays just in case. 2191 */ 2192 nd6_dad_start(ifa, 2193 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2194 } 2195 } 2196 IF_ADDR_UNLOCK(ifp); 2197 2198 /* 2199 * special cases, like 6to4, are handled in in6_ifattach 2200 */ 2201 in6_ifattach(ifp, NULL); 2202} 2203 2204int 2205in6if_do_dad(struct ifnet *ifp) 2206{ 2207 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2208 return (0); 2209 2210 switch (ifp->if_type) { 2211#ifdef IFT_DUMMY 2212 case IFT_DUMMY: 2213#endif 2214 case IFT_FAITH: 2215 /* 2216 * These interfaces do not have the IFF_LOOPBACK flag, 2217 * but loop packets back. We do not have to do DAD on such 2218 * interfaces. We should even omit it, because loop-backed 2219 * NS would confuse the DAD procedure. 2220 */ 2221 return (0); 2222 default: 2223 /* 2224 * Our DAD routine requires the interface up and running. 2225 * However, some interfaces can be up before the RUNNING 2226 * status. Additionaly, users may try to assign addresses 2227 * before the interface becomes up (or running). 2228 * We simply skip DAD in such a case as a work around. 2229 * XXX: we should rather mark "tentative" on such addresses, 2230 * and do DAD after the interface becomes ready. 2231 */ 2232 if (!((ifp->if_flags & IFF_UP) && 2233 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2234 return (0); 2235 2236 return (1); 2237 } 2238} 2239 2240/* 2241 * Calculate max IPv6 MTU through all the interfaces and store it 2242 * to in6_maxmtu. 2243 */ 2244void 2245in6_setmaxmtu(void) 2246{ 2247 INIT_VNET_NET(curvnet); 2248 INIT_VNET_INET6(curvnet); 2249 unsigned long maxmtu = 0; 2250 struct ifnet *ifp; 2251 2252 IFNET_RLOCK(); 2253 for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 2254 ifp = TAILQ_NEXT(ifp, if_list)) { 2255 /* this function can be called during ifnet initialization */ 2256 if (!ifp->if_afdata[AF_INET6]) 2257 continue; 2258 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2259 IN6_LINKMTU(ifp) > maxmtu) 2260 maxmtu = IN6_LINKMTU(ifp); 2261 } 2262 IFNET_RUNLOCK(); 2263 if (maxmtu) /* update only when maxmtu is positive */ 2264 V_in6_maxmtu = maxmtu; 2265} 2266 2267/* 2268 * Provide the length of interface identifiers to be used for the link attached 2269 * to the given interface. The length should be defined in "IPv6 over 2270 * xxx-link" document. Note that address architecture might also define 2271 * the length for a particular set of address prefixes, regardless of the 2272 * link type. As clarified in rfc2462bis, those two definitions should be 2273 * consistent, and those really are as of August 2004. 2274 */ 2275int 2276in6_if2idlen(struct ifnet *ifp) 2277{ 2278 switch (ifp->if_type) { 2279 case IFT_ETHER: /* RFC2464 */ 2280#ifdef IFT_PROPVIRTUAL 2281 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2282#endif 2283#ifdef IFT_L2VLAN 2284 case IFT_L2VLAN: /* ditto */ 2285#endif 2286#ifdef IFT_IEEE80211 2287 case IFT_IEEE80211: /* ditto */ 2288#endif 2289#ifdef IFT_MIP 2290 case IFT_MIP: /* ditto */ 2291#endif 2292 return (64); 2293 case IFT_FDDI: /* RFC2467 */ 2294 return (64); 2295 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2296 return (64); 2297 case IFT_PPP: /* RFC2472 */ 2298 return (64); 2299 case IFT_ARCNET: /* RFC2497 */ 2300 return (64); 2301 case IFT_FRELAY: /* RFC2590 */ 2302 return (64); 2303 case IFT_IEEE1394: /* RFC3146 */ 2304 return (64); 2305 case IFT_GIF: 2306 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2307 case IFT_LOOP: 2308 return (64); /* XXX: is this really correct? */ 2309 default: 2310 /* 2311 * Unknown link type: 2312 * It might be controversial to use the today's common constant 2313 * of 64 for these cases unconditionally. For full compliance, 2314 * we should return an error in this case. On the other hand, 2315 * if we simply miss the standard for the link type or a new 2316 * standard is defined for a new link type, the IFID length 2317 * is very likely to be the common constant. As a compromise, 2318 * we always use the constant, but make an explicit notice 2319 * indicating the "unknown" case. 2320 */ 2321 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2322 return (64); 2323 } 2324} 2325 2326#include <sys/sysctl.h> 2327 2328struct in6_llentry { 2329 struct llentry base; 2330 struct sockaddr_in6 l3_addr6; 2331}; 2332 2333static struct llentry * 2334in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2335{ 2336 struct in6_llentry *lle; 2337 2338 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, 2339 M_DONTWAIT | M_ZERO); 2340 if (lle == NULL) /* NB: caller generates msg */ 2341 return NULL; 2342 2343 callout_init(&lle->base.ln_timer_ch, CALLOUT_MPSAFE); 2344 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2345 lle->base.lle_refcnt = 1; 2346 LLE_LOCK_INIT(&lle->base); 2347 return &lle->base; 2348} 2349 2350/* 2351 * Deletes an address from the address table. 2352 * This function is called by the timer functions 2353 * such as arptimer() and nd6_llinfo_timer(), and 2354 * the caller does the locking. 2355 */ 2356static void 2357in6_lltable_free(struct lltable *llt, struct llentry *lle) 2358{ 2359 LLE_WUNLOCK(lle); 2360 LLE_LOCK_DESTROY(lle); 2361 free(lle, M_LLTABLE); 2362} 2363 2364static void 2365in6_lltable_prefix_free(struct lltable *llt, 2366 const struct sockaddr *prefix, 2367 const struct sockaddr *mask) 2368{ 2369 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2370 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2371 struct llentry *lle, *next; 2372 register int i; 2373 2374 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 2375 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2376 if (IN6_ARE_MASKED_ADDR_EQUAL( 2377 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr, 2378 &pfx->sin6_addr, 2379 &msk->sin6_addr)) { 2380 callout_drain(&lle->la_timer); 2381 LLE_WLOCK(lle); 2382 llentry_free(lle); 2383 } 2384 } 2385 } 2386} 2387 2388static int 2389in6_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 2390{ 2391 struct rtentry *rt; 2392 char ip6buf[INET6_ADDRSTRLEN]; 2393 2394 KASSERT(l3addr->sa_family == AF_INET6, 2395 ("sin_family %d", l3addr->sa_family)); 2396 2397 /* XXX rtalloc1 should take a const param */ 2398 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 2399 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2400 struct ifaddr *ifa; 2401 /* 2402 * Create an ND6 cache for an IPv6 neighbor 2403 * that is not covered by our own prefix. 2404 */ 2405 /* XXX ifaof_ifpforaddr should take a const param */ 2406 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2407 if (ifa != NULL) { 2408 ifa_free(ifa); 2409 if (rt != NULL) 2410 RTFREE_LOCKED(rt); 2411 return 0; 2412 } 2413 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2414 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2415 if (rt != NULL) 2416 RTFREE_LOCKED(rt); 2417 return EINVAL; 2418 } 2419 RTFREE_LOCKED(rt); 2420 return 0; 2421} 2422 2423static struct llentry * 2424in6_lltable_lookup(struct lltable *llt, u_int flags, 2425 const struct sockaddr *l3addr) 2426{ 2427 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2428 struct ifnet *ifp = llt->llt_ifp; 2429 struct llentry *lle; 2430 struct llentries *lleh; 2431 u_int hashkey; 2432 2433 IF_AFDATA_LOCK_ASSERT(ifp); 2434 KASSERT(l3addr->sa_family == AF_INET6, 2435 ("sin_family %d", l3addr->sa_family)); 2436 2437 hashkey = sin6->sin6_addr.s6_addr32[3]; 2438 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2439 LIST_FOREACH(lle, lleh, lle_next) { 2440 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2441 if (lle->la_flags & LLE_DELETED) 2442 continue; 2443 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2444 sizeof(struct in6_addr)) == 0) 2445 break; 2446 } 2447 2448 if (lle == NULL) { 2449 if (!(flags & LLE_CREATE)) 2450 return (NULL); 2451 /* 2452 * A route that covers the given address must have 2453 * been installed 1st because we are doing a resolution, 2454 * verify this. 2455 */ 2456 if (!(flags & LLE_IFADDR) && 2457 in6_lltable_rtcheck(ifp, l3addr) != 0) 2458 return NULL; 2459 2460 lle = in6_lltable_new(l3addr, flags); 2461 if (lle == NULL) { 2462 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2463 return NULL; 2464 } 2465 lle->la_flags = flags & ~LLE_CREATE; 2466 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2467 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2468 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2469 } 2470 2471 lle->lle_tbl = llt; 2472 lle->lle_head = lleh; 2473 LIST_INSERT_HEAD(lleh, lle, lle_next); 2474 } else if (flags & LLE_DELETE) { 2475 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2476 LLE_WLOCK(lle); 2477 lle->la_flags = LLE_DELETED; 2478 LLE_WUNLOCK(lle); 2479#ifdef DIAGNOSTICS 2480 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2481#endif 2482 } 2483 lle = (void *)-1; 2484 } 2485 if (LLE_IS_VALID(lle)) { 2486 if (flags & LLE_EXCLUSIVE) 2487 LLE_WLOCK(lle); 2488 else 2489 LLE_RLOCK(lle); 2490 } 2491 return (lle); 2492} 2493 2494static int 2495in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2496{ 2497 struct ifnet *ifp = llt->llt_ifp; 2498 struct llentry *lle; 2499 /* XXX stack use */ 2500 struct { 2501 struct rt_msghdr rtm; 2502 struct sockaddr_in6 sin6; 2503 /* 2504 * ndp.c assumes that sdl is word aligned 2505 */ 2506#ifdef __LP64__ 2507 uint32_t pad; 2508#endif 2509 struct sockaddr_dl sdl; 2510 } ndpc; 2511 int i, error; 2512 2513 /* XXXXX 2514 * current IFNET_RLOCK() is mapped to IFNET_WLOCK() 2515 * so it is okay to use this ASSERT, change it when 2516 * IFNET lock is finalized 2517 */ 2518 IFNET_WLOCK_ASSERT(); 2519 2520 error = 0; 2521 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2522 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2523 struct sockaddr_dl *sdl; 2524 2525 /* skip deleted or invalid entries */ 2526 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2527 continue; 2528 /* Skip if jailed and not a valid IP of the prison. */ 2529 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2530 continue; 2531 /* 2532 * produce a msg made of: 2533 * struct rt_msghdr; 2534 * struct sockaddr_in6 (IPv6) 2535 * struct sockaddr_dl; 2536 */ 2537 bzero(&ndpc, sizeof(ndpc)); 2538 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2539 ndpc.rtm.rtm_version = RTM_VERSION; 2540 ndpc.rtm.rtm_type = RTM_GET; 2541 ndpc.rtm.rtm_flags = RTF_UP; 2542 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2543 ndpc.sin6.sin6_family = AF_INET6; 2544 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2545 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2546 2547 /* publish */ 2548 if (lle->la_flags & LLE_PUB) 2549 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2550 2551 sdl = &ndpc.sdl; 2552 sdl->sdl_family = AF_LINK; 2553 sdl->sdl_len = sizeof(*sdl); 2554 sdl->sdl_alen = ifp->if_addrlen; 2555 sdl->sdl_index = ifp->if_index; 2556 sdl->sdl_type = ifp->if_type; 2557 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2558 ndpc.rtm.rtm_rmx.rmx_expire = 2559 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2560 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2561 if (lle->la_flags & LLE_STATIC) 2562 ndpc.rtm.rtm_flags |= RTF_STATIC; 2563 ndpc.rtm.rtm_index = ifp->if_index; 2564 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2565 if (error) 2566 break; 2567 } 2568 } 2569 return error; 2570} 2571 2572void * 2573in6_domifattach(struct ifnet *ifp) 2574{ 2575 struct in6_ifextra *ext; 2576 2577 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2578 bzero(ext, sizeof(*ext)); 2579 2580 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2581 M_IFADDR, M_WAITOK); 2582 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2583 2584 ext->icmp6_ifstat = 2585 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2586 M_IFADDR, M_WAITOK); 2587 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2588 2589 ext->nd_ifinfo = nd6_ifattach(ifp); 2590 ext->scope6_id = scope6_ifattach(ifp); 2591 ext->lltable = lltable_init(ifp, AF_INET6); 2592 if (ext->lltable != NULL) { 2593 ext->lltable->llt_new = in6_lltable_new; 2594 ext->lltable->llt_free = in6_lltable_free; 2595 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2596 ext->lltable->llt_rtcheck = in6_lltable_rtcheck; 2597 ext->lltable->llt_lookup = in6_lltable_lookup; 2598 ext->lltable->llt_dump = in6_lltable_dump; 2599 } 2600 2601 ext->mld_ifinfo = mld_domifattach(ifp); 2602 2603 return ext; 2604} 2605 2606void 2607in6_domifdetach(struct ifnet *ifp, void *aux) 2608{ 2609 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2610 2611 mld_domifdetach(ifp); 2612 scope6_ifdetach(ext->scope6_id); 2613 nd6_ifdetach(ext->nd_ifinfo); 2614 lltable_free(ext->lltable); 2615 free(ext->in6_ifstat, M_IFADDR); 2616 free(ext->icmp6_ifstat, M_IFADDR); 2617 free(ext, M_IFADDR); 2618} 2619 2620/* 2621 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2622 * v4 mapped addr or v4 compat addr 2623 */ 2624void 2625in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2626{ 2627 2628 bzero(sin, sizeof(*sin)); 2629 sin->sin_len = sizeof(struct sockaddr_in); 2630 sin->sin_family = AF_INET; 2631 sin->sin_port = sin6->sin6_port; 2632 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2633} 2634 2635/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2636void 2637in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2638{ 2639 bzero(sin6, sizeof(*sin6)); 2640 sin6->sin6_len = sizeof(struct sockaddr_in6); 2641 sin6->sin6_family = AF_INET6; 2642 sin6->sin6_port = sin->sin_port; 2643 sin6->sin6_addr.s6_addr32[0] = 0; 2644 sin6->sin6_addr.s6_addr32[1] = 0; 2645 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2646 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2647} 2648 2649/* Convert sockaddr_in6 into sockaddr_in. */ 2650void 2651in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2652{ 2653 struct sockaddr_in *sin_p; 2654 struct sockaddr_in6 sin6; 2655 2656 /* 2657 * Save original sockaddr_in6 addr and convert it 2658 * to sockaddr_in. 2659 */ 2660 sin6 = *(struct sockaddr_in6 *)nam; 2661 sin_p = (struct sockaddr_in *)nam; 2662 in6_sin6_2_sin(sin_p, &sin6); 2663} 2664 2665/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2666void 2667in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2668{ 2669 struct sockaddr_in *sin_p; 2670 struct sockaddr_in6 *sin6_p; 2671 2672 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 2673 M_WAITOK); 2674 sin_p = (struct sockaddr_in *)*nam; 2675 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2676 free(*nam, M_SONAME); 2677 *nam = (struct sockaddr *)sin6_p; 2678} 2679