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_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 83 #include <net/if.h> 84 #include <net/if_types.h> 85 #include <net/route.h> 86 #include <net/if_dl.h> 87 #include <net/vnet.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_var.h> 91 #include <net/if_llatbl.h> 92 #include <netinet/if_ether.h> 93 #include <netinet/in_systm.h> 94 #include <netinet/ip.h> 95 #include <netinet/in_pcb.h> 96 97 #include <netinet/ip6.h> 98 #include <netinet6/ip6_var.h> 99 #include <netinet6/nd6.h> 100 #include <netinet6/mld6_var.h> 101 #include <netinet6/ip6_mroute.h> 102 #include <netinet6/in6_ifattach.h> 103 #include <netinet6/scope6_var.h> 104 #include <netinet6/in6_pcb.h> 105 106 /* 107 * Definitions of some costant IP6 addresses. 108 */ 109 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 110 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 111 const struct in6_addr in6addr_nodelocal_allnodes = 112 IN6ADDR_NODELOCAL_ALLNODES_INIT; 113 const struct in6_addr in6addr_linklocal_allnodes = 114 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 115 const struct in6_addr in6addr_linklocal_allrouters = 116 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 117 const struct in6_addr in6addr_linklocal_allv2routers = 118 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 119 120 const struct in6_addr in6mask0 = IN6MASK0; 121 const struct in6_addr in6mask32 = IN6MASK32; 122 const struct in6_addr in6mask64 = IN6MASK64; 123 const struct in6_addr in6mask96 = IN6MASK96; 124 const struct in6_addr in6mask128 = IN6MASK128; 125 126 const struct sockaddr_in6 sa6_any = 127 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 128 129 static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, 130 struct ifnet *, struct thread *)); 131 static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, 132 struct sockaddr_in6 *, int)); 133 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 134 135 int (*faithprefix_p)(struct in6_addr *); 136 137 138 139 int 140 in6_mask2len(struct in6_addr *mask, u_char *lim0) 141 { 142 int x = 0, y; 143 u_char *lim = lim0, *p; 144 145 /* ignore the scope_id part */ 146 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 147 lim = (u_char *)mask + sizeof(*mask); 148 for (p = (u_char *)mask; p < lim; x++, p++) { 149 if (*p != 0xff) 150 break; 151 } 152 y = 0; 153 if (p < lim) { 154 for (y = 0; y < 8; y++) { 155 if ((*p & (0x80 >> y)) == 0) 156 break; 157 } 158 } 159 160 /* 161 * when the limit pointer is given, do a stricter check on the 162 * remaining bits. 163 */ 164 if (p < lim) { 165 if (y != 0 && (*p & (0x00ff >> y)) != 0) 166 return (-1); 167 for (p = p + 1; p < lim; p++) 168 if (*p != 0) 169 return (-1); 170 } 171 172 return x * 8 + y; 173 } 174 175 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 176 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 177 178 int 179 in6_control(struct socket *so, u_long cmd, caddr_t data, 180 struct ifnet *ifp, struct thread *td) 181 { 182 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 183 struct in6_ifaddr *ia = NULL; 184 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 185 struct sockaddr_in6 *sa6; 186 int error; 187 188 switch (cmd) { 189 case SIOCGETSGCNT_IN6: 190 case SIOCGETMIFCNT_IN6: 191 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 192 } 193 194 switch(cmd) { 195 case SIOCAADDRCTL_POLICY: 196 case SIOCDADDRCTL_POLICY: 197 if (td != NULL) { 198 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 199 if (error) 200 return (error); 201 } 202 return (in6_src_ioctl(cmd, data)); 203 } 204 205 if (ifp == NULL) 206 return (EOPNOTSUPP); 207 208 switch (cmd) { 209 case SIOCSNDFLUSH_IN6: 210 case SIOCSPFXFLUSH_IN6: 211 case SIOCSRTRFLUSH_IN6: 212 case SIOCSDEFIFACE_IN6: 213 case SIOCSIFINFO_FLAGS: 214 case SIOCSIFINFO_IN6: 215 if (td != NULL) { 216 error = priv_check(td, PRIV_NETINET_ND6); 217 if (error) 218 return (error); 219 } 220 /* FALLTHROUGH */ 221 case OSIOCGIFINFO_IN6: 222 case SIOCGIFINFO_IN6: 223 case SIOCGDRLST_IN6: 224 case SIOCGPRLST_IN6: 225 case SIOCGNBRINFO_IN6: 226 case SIOCGDEFIFACE_IN6: 227 return (nd6_ioctl(cmd, data, ifp)); 228 } 229 230 switch (cmd) { 231 case SIOCSIFPREFIX_IN6: 232 case SIOCDIFPREFIX_IN6: 233 case SIOCAIFPREFIX_IN6: 234 case SIOCCIFPREFIX_IN6: 235 case SIOCSGIFPREFIX_IN6: 236 case SIOCGIFPREFIX_IN6: 237 log(LOG_NOTICE, 238 "prefix ioctls are now invalidated. " 239 "please use ifconfig.\n"); 240 return (EOPNOTSUPP); 241 } 242 243 switch (cmd) { 244 case SIOCSSCOPE6: 245 if (td != NULL) { 246 error = priv_check(td, PRIV_NETINET_SCOPE6); 247 if (error) 248 return (error); 249 } 250 return (scope6_set(ifp, 251 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 252 case SIOCGSCOPE6: 253 return (scope6_get(ifp, 254 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 255 case SIOCGSCOPE6DEF: 256 return (scope6_get_default((struct scope6_id *) 257 ifr->ifr_ifru.ifru_scope_id)); 258 } 259 260 switch (cmd) { 261 case SIOCALIFADDR: 262 if (td != NULL) { 263 error = priv_check(td, PRIV_NET_ADDIFADDR); 264 if (error) 265 return (error); 266 } 267 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 268 269 case SIOCDLIFADDR: 270 if (td != NULL) { 271 error = priv_check(td, PRIV_NET_DELIFADDR); 272 if (error) 273 return (error); 274 } 275 /* FALLTHROUGH */ 276 case SIOCGLIFADDR: 277 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 278 } 279 280 /* 281 * Find address for this interface, if it exists. 282 * 283 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 284 * only, and used the first interface address as the target of other 285 * operations (without checking ifra_addr). This was because netinet 286 * code/API assumed at most 1 interface address per interface. 287 * Since IPv6 allows a node to assign multiple addresses 288 * on a single interface, we almost always look and check the 289 * presence of ifra_addr, and reject invalid ones here. 290 * It also decreases duplicated code among SIOC*_IN6 operations. 291 */ 292 switch (cmd) { 293 case SIOCAIFADDR_IN6: 294 case SIOCSIFPHYADDR_IN6: 295 sa6 = &ifra->ifra_addr; 296 break; 297 case SIOCSIFADDR_IN6: 298 case SIOCGIFADDR_IN6: 299 case SIOCSIFDSTADDR_IN6: 300 case SIOCSIFNETMASK_IN6: 301 case SIOCGIFDSTADDR_IN6: 302 case SIOCGIFNETMASK_IN6: 303 case SIOCDIFADDR_IN6: 304 case SIOCGIFPSRCADDR_IN6: 305 case SIOCGIFPDSTADDR_IN6: 306 case SIOCGIFAFLAG_IN6: 307 case SIOCSNDFLUSH_IN6: 308 case SIOCSPFXFLUSH_IN6: 309 case SIOCSRTRFLUSH_IN6: 310 case SIOCGIFALIFETIME_IN6: 311 case SIOCSIFALIFETIME_IN6: 312 case SIOCGIFSTAT_IN6: 313 case SIOCGIFSTAT_ICMP6: 314 sa6 = &ifr->ifr_addr; 315 break; 316 default: 317 sa6 = NULL; 318 break; 319 } 320 if (sa6 && sa6->sin6_family == AF_INET6) { 321 if (sa6->sin6_scope_id != 0) 322 error = sa6_embedscope(sa6, 0); 323 else 324 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 325 if (error != 0) 326 return (error); 327 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 328 &sa6->sin6_addr)) != 0) 329 return (error); 330 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 331 } else 332 ia = NULL; 333 334 switch (cmd) { 335 case SIOCSIFADDR_IN6: 336 case SIOCSIFDSTADDR_IN6: 337 case SIOCSIFNETMASK_IN6: 338 /* 339 * Since IPv6 allows a node to assign multiple addresses 340 * on a single interface, SIOCSIFxxx ioctls are deprecated. 341 */ 342 /* we decided to obsolete this command (20000704) */ 343 error = EINVAL; 344 goto out; 345 346 case SIOCDIFADDR_IN6: 347 /* 348 * for IPv4, we look for existing in_ifaddr here to allow 349 * "ifconfig if0 delete" to remove the first IPv4 address on 350 * the interface. For IPv6, as the spec allows multiple 351 * interface address from the day one, we consider "remove the 352 * first one" semantics to be not preferable. 353 */ 354 if (ia == NULL) { 355 error = EADDRNOTAVAIL; 356 goto out; 357 } 358 /* FALLTHROUGH */ 359 case SIOCAIFADDR_IN6: 360 /* 361 * We always require users to specify a valid IPv6 address for 362 * the corresponding operation. 363 */ 364 if (ifra->ifra_addr.sin6_family != AF_INET6 || 365 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 366 error = EAFNOSUPPORT; 367 goto out; 368 } 369 370 if (td != NULL) { 371 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 372 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 373 if (error) 374 goto out; 375 } 376 break; 377 378 case SIOCGIFADDR_IN6: 379 /* This interface is basically deprecated. use SIOCGIFCONF. */ 380 /* FALLTHROUGH */ 381 case SIOCGIFAFLAG_IN6: 382 case SIOCGIFNETMASK_IN6: 383 case SIOCGIFDSTADDR_IN6: 384 case SIOCGIFALIFETIME_IN6: 385 /* must think again about its semantics */ 386 if (ia == NULL) { 387 error = EADDRNOTAVAIL; 388 goto out; 389 } 390 break; 391 392 case SIOCSIFALIFETIME_IN6: 393 { 394 struct in6_addrlifetime *lt; 395 396 if (td != NULL) { 397 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 398 if (error) 399 goto out; 400 } 401 if (ia == NULL) { 402 error = EADDRNOTAVAIL; 403 goto out; 404 } 405 /* sanity for overflow - beware unsigned */ 406 lt = &ifr->ifr_ifru.ifru_lifetime; 407 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 408 lt->ia6t_vltime + time_second < time_second) { 409 error = EINVAL; 410 goto out; 411 } 412 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 413 lt->ia6t_pltime + time_second < time_second) { 414 error = EINVAL; 415 goto out; 416 } 417 break; 418 } 419 } 420 421 switch (cmd) { 422 case SIOCGIFADDR_IN6: 423 ifr->ifr_addr = ia->ia_addr; 424 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 425 goto out; 426 break; 427 428 case SIOCGIFDSTADDR_IN6: 429 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 430 error = EINVAL; 431 goto out; 432 } 433 /* 434 * XXX: should we check if ifa_dstaddr is NULL and return 435 * an error? 436 */ 437 ifr->ifr_dstaddr = ia->ia_dstaddr; 438 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 439 goto out; 440 break; 441 442 case SIOCGIFNETMASK_IN6: 443 ifr->ifr_addr = ia->ia_prefixmask; 444 break; 445 446 case SIOCGIFAFLAG_IN6: 447 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 448 break; 449 450 case SIOCGIFSTAT_IN6: 451 if (ifp == NULL) { 452 error = EINVAL; 453 goto out; 454 } 455 bzero(&ifr->ifr_ifru.ifru_stat, 456 sizeof(ifr->ifr_ifru.ifru_stat)); 457 ifr->ifr_ifru.ifru_stat = 458 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat; 459 break; 460 461 case SIOCGIFSTAT_ICMP6: 462 if (ifp == NULL) { 463 error = EINVAL; 464 goto out; 465 } 466 bzero(&ifr->ifr_ifru.ifru_icmp6stat, 467 sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 468 ifr->ifr_ifru.ifru_icmp6stat = 469 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat; 470 break; 471 472 case SIOCGIFALIFETIME_IN6: 473 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 474 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 475 time_t maxexpire; 476 struct in6_addrlifetime *retlt = 477 &ifr->ifr_ifru.ifru_lifetime; 478 479 /* 480 * XXX: adjust expiration time assuming time_t is 481 * signed. 482 */ 483 maxexpire = (-1) & 484 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 485 if (ia->ia6_lifetime.ia6t_vltime < 486 maxexpire - ia->ia6_updatetime) { 487 retlt->ia6t_expire = ia->ia6_updatetime + 488 ia->ia6_lifetime.ia6t_vltime; 489 } else 490 retlt->ia6t_expire = maxexpire; 491 } 492 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 493 time_t maxexpire; 494 struct in6_addrlifetime *retlt = 495 &ifr->ifr_ifru.ifru_lifetime; 496 497 /* 498 * XXX: adjust expiration time assuming time_t is 499 * signed. 500 */ 501 maxexpire = (-1) & 502 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 503 if (ia->ia6_lifetime.ia6t_pltime < 504 maxexpire - ia->ia6_updatetime) { 505 retlt->ia6t_preferred = ia->ia6_updatetime + 506 ia->ia6_lifetime.ia6t_pltime; 507 } else 508 retlt->ia6t_preferred = maxexpire; 509 } 510 break; 511 512 case SIOCSIFALIFETIME_IN6: 513 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 514 /* for sanity */ 515 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 516 ia->ia6_lifetime.ia6t_expire = 517 time_second + ia->ia6_lifetime.ia6t_vltime; 518 } else 519 ia->ia6_lifetime.ia6t_expire = 0; 520 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 521 ia->ia6_lifetime.ia6t_preferred = 522 time_second + ia->ia6_lifetime.ia6t_pltime; 523 } else 524 ia->ia6_lifetime.ia6t_preferred = 0; 525 break; 526 527 case SIOCAIFADDR_IN6: 528 { 529 int i; 530 struct nd_prefixctl pr0; 531 struct nd_prefix *pr; 532 533 /* 534 * first, make or update the interface address structure, 535 * and link it to the list. 536 */ 537 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 538 goto out; 539 if (ia != NULL) 540 ifa_free(&ia->ia_ifa); 541 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 542 == NULL) { 543 /* 544 * this can happen when the user specify the 0 valid 545 * lifetime. 546 */ 547 break; 548 } 549 550 /* 551 * then, make the prefix on-link on the interface. 552 * XXX: we'd rather create the prefix before the address, but 553 * we need at least one address to install the corresponding 554 * interface route, so we configure the address first. 555 */ 556 557 /* 558 * convert mask to prefix length (prefixmask has already 559 * been validated in in6_update_ifa(). 560 */ 561 bzero(&pr0, sizeof(pr0)); 562 pr0.ndpr_ifp = ifp; 563 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 564 NULL); 565 if (pr0.ndpr_plen == 128) { 566 break; /* we don't need to install a host route. */ 567 } 568 pr0.ndpr_prefix = ifra->ifra_addr; 569 /* apply the mask for safety. */ 570 for (i = 0; i < 4; i++) { 571 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 572 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 573 } 574 /* 575 * XXX: since we don't have an API to set prefix (not address) 576 * lifetimes, we just use the same lifetimes as addresses. 577 * The (temporarily) installed lifetimes can be overridden by 578 * later advertised RAs (when accept_rtadv is non 0), which is 579 * an intended behavior. 580 */ 581 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 582 pr0.ndpr_raf_auto = 583 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 584 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 585 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 586 587 /* add the prefix if not yet. */ 588 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 589 /* 590 * nd6_prelist_add will install the corresponding 591 * interface route. 592 */ 593 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 594 goto out; 595 if (pr == NULL) { 596 log(LOG_ERR, "nd6_prelist_add succeeded but " 597 "no prefix\n"); 598 error = EINVAL; 599 goto out; 600 } 601 } 602 603 /* relate the address to the prefix */ 604 if (ia->ia6_ndpr == NULL) { 605 ia->ia6_ndpr = pr; 606 pr->ndpr_refcnt++; 607 608 /* 609 * If this is the first autoconf address from the 610 * prefix, create a temporary address as well 611 * (when required). 612 */ 613 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 614 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 615 int e; 616 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 617 log(LOG_NOTICE, "in6_control: failed " 618 "to create a temporary address, " 619 "errno=%d\n", e); 620 } 621 } 622 } 623 624 /* 625 * this might affect the status of autoconfigured addresses, 626 * that is, this address might make other addresses detached. 627 */ 628 pfxlist_onlink_check(); 629 if (error == 0 && ia) 630 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 631 break; 632 } 633 634 case SIOCDIFADDR_IN6: 635 { 636 struct nd_prefix *pr; 637 638 /* 639 * If the address being deleted is the only one that owns 640 * the corresponding prefix, expire the prefix as well. 641 * XXX: theoretically, we don't have to worry about such 642 * relationship, since we separate the address management 643 * and the prefix management. We do this, however, to provide 644 * as much backward compatibility as possible in terms of 645 * the ioctl operation. 646 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 647 */ 648 pr = ia->ia6_ndpr; 649 in6_purgeaddr(&ia->ia_ifa); 650 if (pr && pr->ndpr_refcnt == 0) 651 prelist_remove(pr); 652 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 653 break; 654 } 655 656 default: 657 if (ifp == NULL || ifp->if_ioctl == 0) { 658 error = EOPNOTSUPP; 659 goto out; 660 } 661 error = (*ifp->if_ioctl)(ifp, cmd, data); 662 goto out; 663 } 664 665 error = 0; 666 out: 667 if (ia != NULL) 668 ifa_free(&ia->ia_ifa); 669 return (error); 670 } 671 672 /* 673 * Update parameters of an IPv6 interface address. 674 * If necessary, a new entry is created and linked into address chains. 675 * This function is separated from in6_control(). 676 * XXX: should this be performed under splnet()? 677 */ 678 int 679 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 680 struct in6_ifaddr *ia, int flags) 681 { 682 int error = 0, hostIsNew = 0, plen = -1; 683 struct sockaddr_in6 dst6; 684 struct in6_addrlifetime *lt; 685 struct in6_multi_mship *imm; 686 struct in6_multi *in6m_sol; 687 struct rtentry *rt; 688 int delay; 689 char ip6buf[INET6_ADDRSTRLEN]; 690 691 /* Validate parameters */ 692 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 693 return (EINVAL); 694 695 /* 696 * The destination address for a p2p link must have a family 697 * of AF_UNSPEC or AF_INET6. 698 */ 699 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 700 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 701 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 702 return (EAFNOSUPPORT); 703 /* 704 * validate ifra_prefixmask. don't check sin6_family, netmask 705 * does not carry fields other than sin6_len. 706 */ 707 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 708 return (EINVAL); 709 /* 710 * Because the IPv6 address architecture is classless, we require 711 * users to specify a (non 0) prefix length (mask) for a new address. 712 * We also require the prefix (when specified) mask is valid, and thus 713 * reject a non-consecutive mask. 714 */ 715 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 716 return (EINVAL); 717 if (ifra->ifra_prefixmask.sin6_len != 0) { 718 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 719 (u_char *)&ifra->ifra_prefixmask + 720 ifra->ifra_prefixmask.sin6_len); 721 if (plen <= 0) 722 return (EINVAL); 723 } else { 724 /* 725 * In this case, ia must not be NULL. We just use its prefix 726 * length. 727 */ 728 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 729 } 730 /* 731 * If the destination address on a p2p interface is specified, 732 * and the address is a scoped one, validate/set the scope 733 * zone identifier. 734 */ 735 dst6 = ifra->ifra_dstaddr; 736 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 737 (dst6.sin6_family == AF_INET6)) { 738 struct in6_addr in6_tmp; 739 u_int32_t zoneid; 740 741 in6_tmp = dst6.sin6_addr; 742 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 743 return (EINVAL); /* XXX: should be impossible */ 744 745 if (dst6.sin6_scope_id != 0) { 746 if (dst6.sin6_scope_id != zoneid) 747 return (EINVAL); 748 } else /* user omit to specify the ID. */ 749 dst6.sin6_scope_id = zoneid; 750 751 /* convert into the internal form */ 752 if (sa6_embedscope(&dst6, 0)) 753 return (EINVAL); /* XXX: should be impossible */ 754 } 755 /* 756 * The destination address can be specified only for a p2p or a 757 * loopback interface. If specified, the corresponding prefix length 758 * must be 128. 759 */ 760 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 761 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 762 /* XXX: noisy message */ 763 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 764 "be specified for a p2p or a loopback IF only\n")); 765 return (EINVAL); 766 } 767 if (plen != 128) { 768 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 769 "be 128 when dstaddr is specified\n")); 770 return (EINVAL); 771 } 772 } 773 /* lifetime consistency check */ 774 lt = &ifra->ifra_lifetime; 775 if (lt->ia6t_pltime > lt->ia6t_vltime) 776 return (EINVAL); 777 if (lt->ia6t_vltime == 0) { 778 /* 779 * the following log might be noisy, but this is a typical 780 * configuration mistake or a tool's bug. 781 */ 782 nd6log((LOG_INFO, 783 "in6_update_ifa: valid lifetime is 0 for %s\n", 784 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 785 786 if (ia == NULL) 787 return (0); /* there's nothing to do */ 788 } 789 790 /* 791 * If this is a new address, allocate a new ifaddr and link it 792 * into chains. 793 */ 794 if (ia == NULL) { 795 hostIsNew = 1; 796 /* 797 * When in6_update_ifa() is called in a process of a received 798 * RA, it is called under an interrupt context. So, we should 799 * call malloc with M_NOWAIT. 800 */ 801 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 802 M_NOWAIT); 803 if (ia == NULL) 804 return (ENOBUFS); 805 bzero((caddr_t)ia, sizeof(*ia)); 806 ifa_init(&ia->ia_ifa); 807 LIST_INIT(&ia->ia6_memberships); 808 /* Initialize the address and masks, and put time stamp */ 809 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 810 ia->ia_addr.sin6_family = AF_INET6; 811 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 812 ia->ia6_createtime = time_second; 813 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 814 /* 815 * XXX: some functions expect that ifa_dstaddr is not 816 * NULL for p2p interfaces. 817 */ 818 ia->ia_ifa.ifa_dstaddr = 819 (struct sockaddr *)&ia->ia_dstaddr; 820 } else { 821 ia->ia_ifa.ifa_dstaddr = NULL; 822 } 823 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 824 ia->ia_ifp = ifp; 825 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 826 IF_ADDR_LOCK(ifp); 827 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 828 IF_ADDR_UNLOCK(ifp); 829 830 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 831 IN6_IFADDR_WLOCK(); 832 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 833 IN6_IFADDR_WUNLOCK(); 834 } 835 836 /* update timestamp */ 837 ia->ia6_updatetime = time_second; 838 839 /* set prefix mask */ 840 if (ifra->ifra_prefixmask.sin6_len) { 841 /* 842 * We prohibit changing the prefix length of an existing 843 * address, because 844 * + such an operation should be rare in IPv6, and 845 * + the operation would confuse prefix management. 846 */ 847 if (ia->ia_prefixmask.sin6_len && 848 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 849 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 850 " existing (%s) address should not be changed\n", 851 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 852 error = EINVAL; 853 goto unlink; 854 } 855 ia->ia_prefixmask = ifra->ifra_prefixmask; 856 } 857 858 /* 859 * If a new destination address is specified, scrub the old one and 860 * install the new destination. Note that the interface must be 861 * p2p or loopback (see the check above.) 862 */ 863 if (dst6.sin6_family == AF_INET6 && 864 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 865 int e; 866 867 if ((ia->ia_flags & IFA_ROUTE) != 0 && 868 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 869 nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 870 "a route to the old destination: %s\n", 871 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 872 /* proceed anyway... */ 873 } else 874 ia->ia_flags &= ~IFA_ROUTE; 875 ia->ia_dstaddr = dst6; 876 } 877 878 /* 879 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 880 * to see if the address is deprecated or invalidated, but initialize 881 * these members for applications. 882 */ 883 ia->ia6_lifetime = ifra->ifra_lifetime; 884 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 885 ia->ia6_lifetime.ia6t_expire = 886 time_second + ia->ia6_lifetime.ia6t_vltime; 887 } else 888 ia->ia6_lifetime.ia6t_expire = 0; 889 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 890 ia->ia6_lifetime.ia6t_preferred = 891 time_second + ia->ia6_lifetime.ia6t_pltime; 892 } else 893 ia->ia6_lifetime.ia6t_preferred = 0; 894 895 /* reset the interface and routing table appropriately. */ 896 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 897 goto unlink; 898 899 /* 900 * configure address flags. 901 */ 902 ia->ia6_flags = ifra->ifra_flags; 903 /* 904 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 905 * userland, make it deprecated. 906 */ 907 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 908 ia->ia6_lifetime.ia6t_pltime = 0; 909 ia->ia6_lifetime.ia6t_preferred = time_second; 910 } 911 /* 912 * Make the address tentative before joining multicast addresses, 913 * so that corresponding MLD responses would not have a tentative 914 * source address. 915 */ 916 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 917 if (hostIsNew && in6if_do_dad(ifp)) 918 ia->ia6_flags |= IN6_IFF_TENTATIVE; 919 920 /* 921 * We are done if we have simply modified an existing address. 922 */ 923 if (!hostIsNew) 924 return (error); 925 926 /* 927 * Beyond this point, we should call in6_purgeaddr upon an error, 928 * not just go to unlink. 929 */ 930 931 /* Join necessary multicast groups */ 932 in6m_sol = NULL; 933 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 934 struct sockaddr_in6 mltaddr, mltmask; 935 struct in6_addr llsol; 936 937 /* join solicited multicast addr for new host id */ 938 bzero(&llsol, sizeof(struct in6_addr)); 939 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 940 llsol.s6_addr32[1] = 0; 941 llsol.s6_addr32[2] = htonl(1); 942 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 943 llsol.s6_addr8[12] = 0xff; 944 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 945 /* XXX: should not happen */ 946 log(LOG_ERR, "in6_update_ifa: " 947 "in6_setscope failed\n"); 948 goto cleanup; 949 } 950 delay = 0; 951 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 952 /* 953 * We need a random delay for DAD on the address 954 * being configured. It also means delaying 955 * transmission of the corresponding MLD report to 956 * avoid report collision. 957 * [draft-ietf-ipv6-rfc2462bis-02.txt] 958 */ 959 delay = arc4random() % 960 (MAX_RTR_SOLICITATION_DELAY * hz); 961 } 962 imm = in6_joingroup(ifp, &llsol, &error, delay); 963 if (imm == NULL) { 964 nd6log((LOG_WARNING, 965 "in6_update_ifa: addmulti failed for " 966 "%s on %s (errno=%d)\n", 967 ip6_sprintf(ip6buf, &llsol), if_name(ifp), 968 error)); 969 goto cleanup; 970 } 971 LIST_INSERT_HEAD(&ia->ia6_memberships, 972 imm, i6mm_chain); 973 in6m_sol = imm->i6mm_maddr; 974 975 bzero(&mltmask, sizeof(mltmask)); 976 mltmask.sin6_len = sizeof(struct sockaddr_in6); 977 mltmask.sin6_family = AF_INET6; 978 mltmask.sin6_addr = in6mask32; 979 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 980 981 /* 982 * join link-local all-nodes address 983 */ 984 bzero(&mltaddr, sizeof(mltaddr)); 985 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 986 mltaddr.sin6_family = AF_INET6; 987 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 988 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 989 0) 990 goto cleanup; /* XXX: should not fail */ 991 992 /* 993 * XXX: do we really need this automatic routes? 994 * We should probably reconsider this stuff. Most applications 995 * actually do not need the routes, since they usually specify 996 * the outgoing interface. 997 */ 998 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 999 if (rt) { 1000 /* XXX: only works in !SCOPEDROUTING case. */ 1001 if (memcmp(&mltaddr.sin6_addr, 1002 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1003 MLTMASK_LEN)) { 1004 RTFREE_LOCKED(rt); 1005 rt = NULL; 1006 } 1007 } 1008 if (!rt) { 1009 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1010 (struct sockaddr *)&ia->ia_addr, 1011 (struct sockaddr *)&mltmask, RTF_UP, 1012 (struct rtentry **)0); 1013 if (error) 1014 goto cleanup; 1015 } else { 1016 RTFREE_LOCKED(rt); 1017 } 1018 1019 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1020 if (!imm) { 1021 nd6log((LOG_WARNING, 1022 "in6_update_ifa: addmulti failed for " 1023 "%s on %s (errno=%d)\n", 1024 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1025 if_name(ifp), error)); 1026 goto cleanup; 1027 } 1028 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1029 1030 /* 1031 * join node information group address 1032 */ 1033 delay = 0; 1034 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1035 /* 1036 * The spec doesn't say anything about delay for this 1037 * group, but the same logic should apply. 1038 */ 1039 delay = arc4random() % 1040 (MAX_RTR_SOLICITATION_DELAY * hz); 1041 } 1042 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 1043 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 1044 delay); /* XXX jinmei */ 1045 if (!imm) { 1046 nd6log((LOG_WARNING, "in6_update_ifa: " 1047 "addmulti failed for %s on %s " 1048 "(errno=%d)\n", 1049 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1050 if_name(ifp), error)); 1051 /* XXX not very fatal, go on... */ 1052 } else { 1053 LIST_INSERT_HEAD(&ia->ia6_memberships, 1054 imm, i6mm_chain); 1055 } 1056 } 1057 1058 /* 1059 * join interface-local all-nodes address. 1060 * (ff01::1%ifN, and ff01::%ifN/32) 1061 */ 1062 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1063 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) 1064 != 0) 1065 goto cleanup; /* XXX: should not fail */ 1066 /* XXX: again, do we really need the route? */ 1067 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1068 if (rt) { 1069 if (memcmp(&mltaddr.sin6_addr, 1070 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1071 MLTMASK_LEN)) { 1072 RTFREE_LOCKED(rt); 1073 rt = NULL; 1074 } 1075 } 1076 if (!rt) { 1077 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1078 (struct sockaddr *)&ia->ia_addr, 1079 (struct sockaddr *)&mltmask, RTF_UP, 1080 (struct rtentry **)0); 1081 if (error) 1082 goto cleanup; 1083 } else 1084 RTFREE_LOCKED(rt); 1085 1086 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1087 if (!imm) { 1088 nd6log((LOG_WARNING, "in6_update_ifa: " 1089 "addmulti failed for %s on %s " 1090 "(errno=%d)\n", 1091 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1092 if_name(ifp), error)); 1093 goto cleanup; 1094 } 1095 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1096 #undef MLTMASK_LEN 1097 } 1098 1099 /* 1100 * Perform DAD, if needed. 1101 * XXX It may be of use, if we can administratively 1102 * disable DAD. 1103 */ 1104 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1105 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1106 { 1107 int mindelay, maxdelay; 1108 1109 delay = 0; 1110 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1111 /* 1112 * We need to impose a delay before sending an NS 1113 * for DAD. Check if we also needed a delay for the 1114 * corresponding MLD message. If we did, the delay 1115 * should be larger than the MLD delay (this could be 1116 * relaxed a bit, but this simple logic is at least 1117 * safe). 1118 * XXX: Break data hiding guidelines and look at 1119 * state for the solicited multicast group. 1120 */ 1121 mindelay = 0; 1122 if (in6m_sol != NULL && 1123 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1124 mindelay = in6m_sol->in6m_timer; 1125 } 1126 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1127 if (maxdelay - mindelay == 0) 1128 delay = 0; 1129 else { 1130 delay = 1131 (arc4random() % (maxdelay - mindelay)) + 1132 mindelay; 1133 } 1134 } 1135 nd6_dad_start((struct ifaddr *)ia, delay); 1136 } 1137 1138 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1139 ifa_free(&ia->ia_ifa); 1140 return (error); 1141 1142 unlink: 1143 /* 1144 * XXX: if a change of an existing address failed, keep the entry 1145 * anyway. 1146 */ 1147 if (hostIsNew) { 1148 in6_unlink_ifa(ia, ifp); 1149 ifa_free(&ia->ia_ifa); 1150 } 1151 return (error); 1152 1153 cleanup: 1154 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1155 ifa_free(&ia->ia_ifa); 1156 in6_purgeaddr(&ia->ia_ifa); 1157 return error; 1158 } 1159 1160 void 1161 in6_purgeaddr(struct ifaddr *ifa) 1162 { 1163 struct ifnet *ifp = ifa->ifa_ifp; 1164 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1165 struct in6_multi_mship *imm; 1166 struct sockaddr_in6 mltaddr, mltmask; 1167 struct rtentry rt0; 1168 struct sockaddr_dl gateway; 1169 struct sockaddr_in6 mask, addr; 1170 int plen, error; 1171 struct rtentry *rt; 1172 struct ifaddr *ifa0, *nifa; 1173 1174 /* 1175 * find another IPv6 address as the gateway for the 1176 * link-local and node-local all-nodes multicast 1177 * address routes 1178 */ 1179 IF_ADDR_LOCK(ifp); 1180 TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) { 1181 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1182 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1183 &ia->ia_addr.sin6_addr, 1184 sizeof(struct in6_addr)) == 0) 1185 continue; 1186 else 1187 break; 1188 } 1189 if (ifa0 != NULL) 1190 ifa_ref(ifa0); 1191 IF_ADDR_UNLOCK(ifp); 1192 1193 /* 1194 * Remove the loopback route to the interface address. 1195 * The check for the current setting of "nd6_useloopback" is not needed. 1196 */ 1197 if (!(ia->ia_ifp->if_flags & IFF_LOOPBACK)) { 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 1357 cleanup: 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 1388 static void 1389 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1390 { 1391 int s = splnet(); 1392 1393 IF_ADDR_LOCK(ifp); 1394 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1395 IF_ADDR_UNLOCK(ifp); 1396 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1397 1398 /* 1399 * Defer the release of what might be the last reference to the 1400 * in6_ifaddr so that it can't be freed before the remainder of the 1401 * cleanup. 1402 */ 1403 IN6_IFADDR_WLOCK(); 1404 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1405 IN6_IFADDR_WUNLOCK(); 1406 1407 /* 1408 * Release the reference to the base prefix. There should be a 1409 * positive reference. 1410 */ 1411 if (ia->ia6_ndpr == NULL) { 1412 nd6log((LOG_NOTICE, 1413 "in6_unlink_ifa: autoconf'ed address " 1414 "%p has no prefix\n", ia)); 1415 } else { 1416 ia->ia6_ndpr->ndpr_refcnt--; 1417 ia->ia6_ndpr = NULL; 1418 } 1419 1420 /* 1421 * Also, if the address being removed is autoconf'ed, call 1422 * pfxlist_onlink_check() since the release might affect the status of 1423 * other (detached) addresses. 1424 */ 1425 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1426 pfxlist_onlink_check(); 1427 } 1428 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1429 splx(s); 1430 } 1431 1432 void 1433 in6_purgeif(struct ifnet *ifp) 1434 { 1435 struct ifaddr *ifa, *nifa; 1436 1437 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1438 if (ifa->ifa_addr->sa_family != AF_INET6) 1439 continue; 1440 in6_purgeaddr(ifa); 1441 } 1442 1443 in6_ifdetach(ifp); 1444 } 1445 1446 /* 1447 * SIOC[GAD]LIFADDR. 1448 * SIOCGLIFADDR: get first address. (?) 1449 * SIOCGLIFADDR with IFLR_PREFIX: 1450 * get first address that matches the specified prefix. 1451 * SIOCALIFADDR: add the specified address. 1452 * SIOCALIFADDR with IFLR_PREFIX: 1453 * add the specified prefix, filling hostid part from 1454 * the first link-local address. prefixlen must be <= 64. 1455 * SIOCDLIFADDR: delete the specified address. 1456 * SIOCDLIFADDR with IFLR_PREFIX: 1457 * delete the first address that matches the specified prefix. 1458 * return values: 1459 * EINVAL on invalid parameters 1460 * EADDRNOTAVAIL on prefix match failed/specified address not found 1461 * other values may be returned from in6_ioctl() 1462 * 1463 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1464 * this is to accomodate address naming scheme other than RFC2374, 1465 * in the future. 1466 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1467 * address encoding scheme. (see figure on page 8) 1468 */ 1469 static int 1470 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1471 struct ifnet *ifp, struct thread *td) 1472 { 1473 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1474 struct ifaddr *ifa; 1475 struct sockaddr *sa; 1476 1477 /* sanity checks */ 1478 if (!data || !ifp) { 1479 panic("invalid argument to in6_lifaddr_ioctl"); 1480 /* NOTREACHED */ 1481 } 1482 1483 switch (cmd) { 1484 case SIOCGLIFADDR: 1485 /* address must be specified on GET with IFLR_PREFIX */ 1486 if ((iflr->flags & IFLR_PREFIX) == 0) 1487 break; 1488 /* FALLTHROUGH */ 1489 case SIOCALIFADDR: 1490 case SIOCDLIFADDR: 1491 /* address must be specified on ADD and DELETE */ 1492 sa = (struct sockaddr *)&iflr->addr; 1493 if (sa->sa_family != AF_INET6) 1494 return EINVAL; 1495 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1496 return EINVAL; 1497 /* XXX need improvement */ 1498 sa = (struct sockaddr *)&iflr->dstaddr; 1499 if (sa->sa_family && sa->sa_family != AF_INET6) 1500 return EINVAL; 1501 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1502 return EINVAL; 1503 break; 1504 default: /* shouldn't happen */ 1505 #if 0 1506 panic("invalid cmd to in6_lifaddr_ioctl"); 1507 /* NOTREACHED */ 1508 #else 1509 return EOPNOTSUPP; 1510 #endif 1511 } 1512 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1513 return EINVAL; 1514 1515 switch (cmd) { 1516 case SIOCALIFADDR: 1517 { 1518 struct in6_aliasreq ifra; 1519 struct in6_addr *hostid = NULL; 1520 int prefixlen; 1521 1522 ifa = NULL; 1523 if ((iflr->flags & IFLR_PREFIX) != 0) { 1524 struct sockaddr_in6 *sin6; 1525 1526 /* 1527 * hostid is to fill in the hostid part of the 1528 * address. hostid points to the first link-local 1529 * address attached to the interface. 1530 */ 1531 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1532 if (!ifa) 1533 return EADDRNOTAVAIL; 1534 hostid = IFA_IN6(ifa); 1535 1536 /* prefixlen must be <= 64. */ 1537 if (64 < iflr->prefixlen) 1538 return EINVAL; 1539 prefixlen = iflr->prefixlen; 1540 1541 /* hostid part must be zero. */ 1542 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1543 if (sin6->sin6_addr.s6_addr32[2] != 0 || 1544 sin6->sin6_addr.s6_addr32[3] != 0) { 1545 return EINVAL; 1546 } 1547 } else 1548 prefixlen = iflr->prefixlen; 1549 1550 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1551 bzero(&ifra, sizeof(ifra)); 1552 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 1553 1554 bcopy(&iflr->addr, &ifra.ifra_addr, 1555 ((struct sockaddr *)&iflr->addr)->sa_len); 1556 if (hostid) { 1557 /* fill in hostid part */ 1558 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1559 hostid->s6_addr32[2]; 1560 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1561 hostid->s6_addr32[3]; 1562 } 1563 1564 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 1565 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1566 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1567 if (hostid) { 1568 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1569 hostid->s6_addr32[2]; 1570 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1571 hostid->s6_addr32[3]; 1572 } 1573 } 1574 if (ifa != NULL) 1575 ifa_free(ifa); 1576 1577 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1578 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1579 1580 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1581 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1582 } 1583 case SIOCGLIFADDR: 1584 case SIOCDLIFADDR: 1585 { 1586 struct in6_ifaddr *ia; 1587 struct in6_addr mask, candidate, match; 1588 struct sockaddr_in6 *sin6; 1589 int cmp; 1590 1591 bzero(&mask, sizeof(mask)); 1592 if (iflr->flags & IFLR_PREFIX) { 1593 /* lookup a prefix rather than address. */ 1594 in6_prefixlen2mask(&mask, iflr->prefixlen); 1595 1596 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1597 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1598 match.s6_addr32[0] &= mask.s6_addr32[0]; 1599 match.s6_addr32[1] &= mask.s6_addr32[1]; 1600 match.s6_addr32[2] &= mask.s6_addr32[2]; 1601 match.s6_addr32[3] &= mask.s6_addr32[3]; 1602 1603 /* if you set extra bits, that's wrong */ 1604 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1605 return EINVAL; 1606 1607 cmp = 1; 1608 } else { 1609 if (cmd == SIOCGLIFADDR) { 1610 /* on getting an address, take the 1st match */ 1611 cmp = 0; /* XXX */ 1612 } else { 1613 /* on deleting an address, do exact match */ 1614 in6_prefixlen2mask(&mask, 128); 1615 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1616 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1617 1618 cmp = 1; 1619 } 1620 } 1621 1622 IF_ADDR_LOCK(ifp); 1623 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1624 if (ifa->ifa_addr->sa_family != AF_INET6) 1625 continue; 1626 if (!cmp) 1627 break; 1628 1629 /* 1630 * XXX: this is adhoc, but is necessary to allow 1631 * a user to specify fe80::/64 (not /10) for a 1632 * link-local address. 1633 */ 1634 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1635 in6_clearscope(&candidate); 1636 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1637 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1638 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1639 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1640 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1641 break; 1642 } 1643 IF_ADDR_UNLOCK(ifp); 1644 if (!ifa) 1645 return EADDRNOTAVAIL; 1646 ia = ifa2ia6(ifa); 1647 1648 if (cmd == SIOCGLIFADDR) { 1649 int error; 1650 1651 /* fill in the if_laddrreq structure */ 1652 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1653 error = sa6_recoverscope( 1654 (struct sockaddr_in6 *)&iflr->addr); 1655 if (error != 0) 1656 return (error); 1657 1658 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1659 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1660 ia->ia_dstaddr.sin6_len); 1661 error = sa6_recoverscope( 1662 (struct sockaddr_in6 *)&iflr->dstaddr); 1663 if (error != 0) 1664 return (error); 1665 } else 1666 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1667 1668 iflr->prefixlen = 1669 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1670 1671 iflr->flags = ia->ia6_flags; /* XXX */ 1672 1673 return 0; 1674 } else { 1675 struct in6_aliasreq ifra; 1676 1677 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1678 bzero(&ifra, sizeof(ifra)); 1679 bcopy(iflr->iflr_name, ifra.ifra_name, 1680 sizeof(ifra.ifra_name)); 1681 1682 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1683 ia->ia_addr.sin6_len); 1684 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1685 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1686 ia->ia_dstaddr.sin6_len); 1687 } else { 1688 bzero(&ifra.ifra_dstaddr, 1689 sizeof(ifra.ifra_dstaddr)); 1690 } 1691 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1692 ia->ia_prefixmask.sin6_len); 1693 1694 ifra.ifra_flags = ia->ia6_flags; 1695 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1696 ifp, td); 1697 } 1698 } 1699 } 1700 1701 return EOPNOTSUPP; /* just for safety */ 1702 } 1703 1704 /* 1705 * Initialize an interface's intetnet6 address 1706 * and routing table entry. 1707 */ 1708 static int 1709 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1710 struct sockaddr_in6 *sin6, int newhost) 1711 { 1712 int error = 0, plen, ifacount = 0; 1713 int s = splimp(); 1714 struct ifaddr *ifa; 1715 1716 /* 1717 * Give the interface a chance to initialize 1718 * if this is its first address, 1719 * and to validate the address if necessary. 1720 */ 1721 IF_ADDR_LOCK(ifp); 1722 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1723 if (ifa->ifa_addr->sa_family != AF_INET6) 1724 continue; 1725 ifacount++; 1726 } 1727 IF_ADDR_UNLOCK(ifp); 1728 1729 ia->ia_addr = *sin6; 1730 1731 if (ifacount <= 1 && ifp->if_ioctl) { 1732 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1733 if (error) { 1734 splx(s); 1735 return (error); 1736 } 1737 } 1738 splx(s); 1739 1740 ia->ia_ifa.ifa_metric = ifp->if_metric; 1741 1742 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1743 1744 /* 1745 * Special case: 1746 * If a new destination address is specified for a point-to-point 1747 * interface, install a route to the destination as an interface 1748 * direct route. 1749 * XXX: the logic below rejects assigning multiple addresses on a p2p 1750 * interface that share the same destination. 1751 */ 1752 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1753 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1754 ia->ia_dstaddr.sin6_family == AF_INET6) { 1755 int rtflags = RTF_UP | RTF_HOST; 1756 1757 error = rtrequest(RTM_ADD, 1758 (struct sockaddr *)&ia->ia_dstaddr, 1759 (struct sockaddr *)&ia->ia_addr, 1760 (struct sockaddr *)&ia->ia_prefixmask, 1761 ia->ia_flags | rtflags, NULL); 1762 if (error != 0) 1763 return (error); 1764 ia->ia_flags |= IFA_ROUTE; 1765 } 1766 1767 /* 1768 * add a loopback route to self 1769 */ 1770 if (V_nd6_useloopback && !(ifp->if_flags & IFF_LOOPBACK)) { 1771 struct rt_addrinfo info; 1772 struct rtentry *rt = NULL; 1773 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK}; 1774 1775 bzero(&info, sizeof(info)); 1776 info.rti_ifp = V_loif; 1777 info.rti_flags = ia->ia_flags | RTF_HOST | RTF_STATIC; 1778 info.rti_info[RTAX_DST] = (struct sockaddr *)&ia->ia_addr; 1779 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1780 error = rtrequest1_fib(RTM_ADD, &info, &rt, 0); 1781 1782 if (error == 0 && rt != NULL) { 1783 RT_LOCK(rt); 1784 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type = 1785 rt->rt_ifp->if_type; 1786 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index = 1787 rt->rt_ifp->if_index; 1788 RT_REMREF(rt); 1789 RT_UNLOCK(rt); 1790 } else if (error != 0) 1791 log(LOG_INFO, "in6_ifinit: insertion failed\n"); 1792 } 1793 1794 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1795 if (newhost) { 1796 struct llentry *ln; 1797 struct rtentry rt; 1798 struct sockaddr_dl gateway; 1799 struct sockaddr_in6 mask, addr; 1800 1801 IF_AFDATA_LOCK(ifp); 1802 ia->ia_ifa.ifa_rtrequest = NULL; 1803 1804 /* XXX QL 1805 * we need to report rt_newaddrmsg 1806 */ 1807 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE), 1808 (struct sockaddr *)&ia->ia_addr); 1809 IF_AFDATA_UNLOCK(ifp); 1810 if (ln != NULL) { 1811 ln->la_expire = 0; /* for IPv6 this means permanent */ 1812 ln->ln_state = ND6_LLINFO_REACHABLE; 1813 /* 1814 * initialize for rtmsg generation 1815 */ 1816 bzero(&gateway, sizeof(gateway)); 1817 gateway.sdl_len = sizeof(gateway); 1818 gateway.sdl_family = AF_LINK; 1819 gateway.sdl_nlen = 0; 1820 gateway.sdl_alen = 6; 1821 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr)); 1822 /* */ 1823 LLE_WUNLOCK(ln); 1824 } 1825 1826 bzero(&rt, sizeof(rt)); 1827 rt.rt_gateway = (struct sockaddr *)&gateway; 1828 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1829 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1830 rt_mask(&rt) = (struct sockaddr *)&mask; 1831 rt_key(&rt) = (struct sockaddr *)&addr; 1832 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 1833 rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt); 1834 } 1835 1836 return (error); 1837 } 1838 1839 /* 1840 * Find an IPv6 interface link-local address specific to an interface. 1841 * ifaddr is returned referenced. 1842 */ 1843 struct in6_ifaddr * 1844 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1845 { 1846 struct ifaddr *ifa; 1847 1848 IF_ADDR_LOCK(ifp); 1849 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1850 if (ifa->ifa_addr->sa_family != AF_INET6) 1851 continue; 1852 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1853 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1854 ignoreflags) != 0) 1855 continue; 1856 ifa_ref(ifa); 1857 break; 1858 } 1859 } 1860 IF_ADDR_UNLOCK(ifp); 1861 1862 return ((struct in6_ifaddr *)ifa); 1863 } 1864 1865 1866 /* 1867 * find the internet address corresponding to a given interface and address. 1868 * ifaddr is returned referenced. 1869 */ 1870 struct in6_ifaddr * 1871 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1872 { 1873 struct ifaddr *ifa; 1874 1875 IF_ADDR_LOCK(ifp); 1876 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1877 if (ifa->ifa_addr->sa_family != AF_INET6) 1878 continue; 1879 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1880 ifa_ref(ifa); 1881 break; 1882 } 1883 } 1884 IF_ADDR_UNLOCK(ifp); 1885 1886 return ((struct in6_ifaddr *)ifa); 1887 } 1888 1889 /* 1890 * Convert IP6 address to printable (loggable) representation. Caller 1891 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1892 */ 1893 static char digits[] = "0123456789abcdef"; 1894 char * 1895 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1896 { 1897 int i; 1898 char *cp; 1899 const u_int16_t *a = (const u_int16_t *)addr; 1900 const u_int8_t *d; 1901 int dcolon = 0, zero = 0; 1902 1903 cp = ip6buf; 1904 1905 for (i = 0; i < 8; i++) { 1906 if (dcolon == 1) { 1907 if (*a == 0) { 1908 if (i == 7) 1909 *cp++ = ':'; 1910 a++; 1911 continue; 1912 } else 1913 dcolon = 2; 1914 } 1915 if (*a == 0) { 1916 if (dcolon == 0 && *(a + 1) == 0) { 1917 if (i == 0) 1918 *cp++ = ':'; 1919 *cp++ = ':'; 1920 dcolon = 1; 1921 } else { 1922 *cp++ = '0'; 1923 *cp++ = ':'; 1924 } 1925 a++; 1926 continue; 1927 } 1928 d = (const u_char *)a; 1929 /* Try to eliminate leading zeros in printout like in :0001. */ 1930 zero = 1; 1931 *cp = digits[*d >> 4]; 1932 if (*cp != '0') { 1933 zero = 0; 1934 cp++; 1935 } 1936 *cp = digits[*d++ & 0xf]; 1937 if (zero == 0 || (*cp != '0')) { 1938 zero = 0; 1939 cp++; 1940 } 1941 *cp = digits[*d >> 4]; 1942 if (zero == 0 || (*cp != '0')) { 1943 zero = 0; 1944 cp++; 1945 } 1946 *cp++ = digits[*d & 0xf]; 1947 *cp++ = ':'; 1948 a++; 1949 } 1950 *--cp = '\0'; 1951 return (ip6buf); 1952 } 1953 1954 int 1955 in6_localaddr(struct in6_addr *in6) 1956 { 1957 struct in6_ifaddr *ia; 1958 1959 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1960 return 1; 1961 1962 IN6_IFADDR_RLOCK(); 1963 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1964 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1965 &ia->ia_prefixmask.sin6_addr)) { 1966 IN6_IFADDR_RUNLOCK(); 1967 return 1; 1968 } 1969 } 1970 IN6_IFADDR_RUNLOCK(); 1971 1972 return (0); 1973 } 1974 1975 int 1976 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1977 { 1978 struct in6_ifaddr *ia; 1979 1980 IN6_IFADDR_RLOCK(); 1981 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1982 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 1983 &sa6->sin6_addr) && 1984 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { 1985 IN6_IFADDR_RUNLOCK(); 1986 return (1); /* true */ 1987 } 1988 1989 /* XXX: do we still have to go thru the rest of the list? */ 1990 } 1991 IN6_IFADDR_RUNLOCK(); 1992 1993 return (0); /* false */ 1994 } 1995 1996 /* 1997 * return length of part which dst and src are equal 1998 * hard coding... 1999 */ 2000 int 2001 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 2002 { 2003 int match = 0; 2004 u_char *s = (u_char *)src, *d = (u_char *)dst; 2005 u_char *lim = s + 16, r; 2006 2007 while (s < lim) 2008 if ((r = (*d++ ^ *s++)) != 0) { 2009 while (r < 128) { 2010 match++; 2011 r <<= 1; 2012 } 2013 break; 2014 } else 2015 match += 8; 2016 return match; 2017 } 2018 2019 /* XXX: to be scope conscious */ 2020 int 2021 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 2022 { 2023 int bytelen, bitlen; 2024 2025 /* sanity check */ 2026 if (0 > len || len > 128) { 2027 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 2028 len); 2029 return (0); 2030 } 2031 2032 bytelen = len / 8; 2033 bitlen = len % 8; 2034 2035 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2036 return (0); 2037 if (bitlen != 0 && 2038 p1->s6_addr[bytelen] >> (8 - bitlen) != 2039 p2->s6_addr[bytelen] >> (8 - bitlen)) 2040 return (0); 2041 2042 return (1); 2043 } 2044 2045 void 2046 in6_prefixlen2mask(struct in6_addr *maskp, int len) 2047 { 2048 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 2049 int bytelen, bitlen, i; 2050 2051 /* sanity check */ 2052 if (0 > len || len > 128) { 2053 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 2054 len); 2055 return; 2056 } 2057 2058 bzero(maskp, sizeof(*maskp)); 2059 bytelen = len / 8; 2060 bitlen = len % 8; 2061 for (i = 0; i < bytelen; i++) 2062 maskp->s6_addr[i] = 0xff; 2063 if (bitlen) 2064 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2065 } 2066 2067 /* 2068 * return the best address out of the same scope. if no address was 2069 * found, return the first valid address from designated IF. 2070 */ 2071 struct in6_ifaddr * 2072 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2073 { 2074 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2075 struct ifaddr *ifa; 2076 struct in6_ifaddr *besta = 0; 2077 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2078 2079 dep[0] = dep[1] = NULL; 2080 2081 /* 2082 * We first look for addresses in the same scope. 2083 * If there is one, return it. 2084 * If two or more, return one which matches the dst longest. 2085 * If none, return one of global addresses assigned other ifs. 2086 */ 2087 IF_ADDR_LOCK(ifp); 2088 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2089 if (ifa->ifa_addr->sa_family != AF_INET6) 2090 continue; 2091 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2092 continue; /* XXX: is there any case to allow anycast? */ 2093 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2094 continue; /* don't use this interface */ 2095 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2096 continue; 2097 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2098 if (V_ip6_use_deprecated) 2099 dep[0] = (struct in6_ifaddr *)ifa; 2100 continue; 2101 } 2102 2103 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2104 /* 2105 * call in6_matchlen() as few as possible 2106 */ 2107 if (besta) { 2108 if (blen == -1) 2109 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2110 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2111 if (tlen > blen) { 2112 blen = tlen; 2113 besta = (struct in6_ifaddr *)ifa; 2114 } 2115 } else 2116 besta = (struct in6_ifaddr *)ifa; 2117 } 2118 } 2119 if (besta) { 2120 ifa_ref(&besta->ia_ifa); 2121 IF_ADDR_UNLOCK(ifp); 2122 return (besta); 2123 } 2124 IF_ADDR_UNLOCK(ifp); 2125 2126 IN6_IFADDR_RLOCK(); 2127 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2128 if (ifa->ifa_addr->sa_family != AF_INET6) 2129 continue; 2130 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2131 continue; /* XXX: is there any case to allow anycast? */ 2132 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2133 continue; /* don't use this interface */ 2134 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2135 continue; 2136 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2137 if (V_ip6_use_deprecated) 2138 dep[1] = (struct in6_ifaddr *)ifa; 2139 continue; 2140 } 2141 2142 if (ifa != NULL) 2143 ifa_ref(ifa); 2144 IN6_IFADDR_RUNLOCK(); 2145 return (struct in6_ifaddr *)ifa; 2146 } 2147 IN6_IFADDR_RUNLOCK(); 2148 2149 /* use the last-resort values, that are, deprecated addresses */ 2150 if (dep[0]) 2151 return dep[0]; 2152 if (dep[1]) 2153 return dep[1]; 2154 2155 return NULL; 2156 } 2157 2158 /* 2159 * perform DAD when interface becomes IFF_UP. 2160 */ 2161 void 2162 in6_if_up(struct ifnet *ifp) 2163 { 2164 struct ifaddr *ifa; 2165 struct in6_ifaddr *ia; 2166 2167 IF_ADDR_LOCK(ifp); 2168 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2169 if (ifa->ifa_addr->sa_family != AF_INET6) 2170 continue; 2171 ia = (struct in6_ifaddr *)ifa; 2172 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2173 /* 2174 * The TENTATIVE flag was likely set by hand 2175 * beforehand, implicitly indicating the need for DAD. 2176 * We may be able to skip the random delay in this 2177 * case, but we impose delays just in case. 2178 */ 2179 nd6_dad_start(ifa, 2180 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2181 } 2182 } 2183 IF_ADDR_UNLOCK(ifp); 2184 2185 /* 2186 * special cases, like 6to4, are handled in in6_ifattach 2187 */ 2188 in6_ifattach(ifp, NULL); 2189 } 2190 2191 int 2192 in6if_do_dad(struct ifnet *ifp) 2193 { 2194 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2195 return (0); 2196 2197 switch (ifp->if_type) { 2198 #ifdef IFT_DUMMY 2199 case IFT_DUMMY: 2200 #endif 2201 case IFT_FAITH: 2202 /* 2203 * These interfaces do not have the IFF_LOOPBACK flag, 2204 * but loop packets back. We do not have to do DAD on such 2205 * interfaces. We should even omit it, because loop-backed 2206 * NS would confuse the DAD procedure. 2207 */ 2208 return (0); 2209 default: 2210 /* 2211 * Our DAD routine requires the interface up and running. 2212 * However, some interfaces can be up before the RUNNING 2213 * status. Additionaly, users may try to assign addresses 2214 * before the interface becomes up (or running). 2215 * We simply skip DAD in such a case as a work around. 2216 * XXX: we should rather mark "tentative" on such addresses, 2217 * and do DAD after the interface becomes ready. 2218 */ 2219 if (!((ifp->if_flags & IFF_UP) && 2220 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2221 return (0); 2222 2223 return (1); 2224 } 2225 } 2226 2227 /* 2228 * Calculate max IPv6 MTU through all the interfaces and store it 2229 * to in6_maxmtu. 2230 */ 2231 void 2232 in6_setmaxmtu(void) 2233 { 2234 unsigned long maxmtu = 0; 2235 struct ifnet *ifp; 2236 2237 IFNET_RLOCK(); 2238 for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 2239 ifp = TAILQ_NEXT(ifp, if_list)) { 2240 /* this function can be called during ifnet initialization */ 2241 if (!ifp->if_afdata[AF_INET6]) 2242 continue; 2243 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2244 IN6_LINKMTU(ifp) > maxmtu) 2245 maxmtu = IN6_LINKMTU(ifp); 2246 } 2247 IFNET_RUNLOCK(); 2248 if (maxmtu) /* update only when maxmtu is positive */ 2249 V_in6_maxmtu = maxmtu; 2250 } 2251 2252 /* 2253 * Provide the length of interface identifiers to be used for the link attached 2254 * to the given interface. The length should be defined in "IPv6 over 2255 * xxx-link" document. Note that address architecture might also define 2256 * the length for a particular set of address prefixes, regardless of the 2257 * link type. As clarified in rfc2462bis, those two definitions should be 2258 * consistent, and those really are as of August 2004. 2259 */ 2260 int 2261 in6_if2idlen(struct ifnet *ifp) 2262 { 2263 switch (ifp->if_type) { 2264 case IFT_ETHER: /* RFC2464 */ 2265 #ifdef IFT_PROPVIRTUAL 2266 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2267 #endif 2268 #ifdef IFT_L2VLAN 2269 case IFT_L2VLAN: /* ditto */ 2270 #endif 2271 #ifdef IFT_IEEE80211 2272 case IFT_IEEE80211: /* ditto */ 2273 #endif 2274 #ifdef IFT_MIP 2275 case IFT_MIP: /* ditto */ 2276 #endif 2277 return (64); 2278 case IFT_FDDI: /* RFC2467 */ 2279 return (64); 2280 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2281 return (64); 2282 case IFT_PPP: /* RFC2472 */ 2283 return (64); 2284 case IFT_ARCNET: /* RFC2497 */ 2285 return (64); 2286 case IFT_FRELAY: /* RFC2590 */ 2287 return (64); 2288 case IFT_IEEE1394: /* RFC3146 */ 2289 return (64); 2290 case IFT_GIF: 2291 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2292 case IFT_LOOP: 2293 return (64); /* XXX: is this really correct? */ 2294 default: 2295 /* 2296 * Unknown link type: 2297 * It might be controversial to use the today's common constant 2298 * of 64 for these cases unconditionally. For full compliance, 2299 * we should return an error in this case. On the other hand, 2300 * if we simply miss the standard for the link type or a new 2301 * standard is defined for a new link type, the IFID length 2302 * is very likely to be the common constant. As a compromise, 2303 * we always use the constant, but make an explicit notice 2304 * indicating the "unknown" case. 2305 */ 2306 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2307 return (64); 2308 } 2309 } 2310 2311 #include <sys/sysctl.h> 2312 2313 struct in6_llentry { 2314 struct llentry base; 2315 struct sockaddr_in6 l3_addr6; 2316 }; 2317 2318 static struct llentry * 2319 in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2320 { 2321 struct in6_llentry *lle; 2322 2323 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, 2324 M_DONTWAIT | M_ZERO); 2325 if (lle == NULL) /* NB: caller generates msg */ 2326 return NULL; 2327 2328 callout_init(&lle->base.ln_timer_ch, CALLOUT_MPSAFE); 2329 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2330 lle->base.lle_refcnt = 1; 2331 LLE_LOCK_INIT(&lle->base); 2332 return &lle->base; 2333 } 2334 2335 /* 2336 * Deletes an address from the address table. 2337 * This function is called by the timer functions 2338 * such as arptimer() and nd6_llinfo_timer(), and 2339 * the caller does the locking. 2340 */ 2341 static void 2342 in6_lltable_free(struct lltable *llt, struct llentry *lle) 2343 { 2344 LLE_WUNLOCK(lle); 2345 LLE_LOCK_DESTROY(lle); 2346 free(lle, M_LLTABLE); 2347 } 2348 2349 static void 2350 in6_lltable_prefix_free(struct lltable *llt, 2351 const struct sockaddr *prefix, 2352 const struct sockaddr *mask) 2353 { 2354 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2355 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2356 struct llentry *lle, *next; 2357 register int i; 2358 2359 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 2360 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2361 if (IN6_ARE_MASKED_ADDR_EQUAL( 2362 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr, 2363 &pfx->sin6_addr, 2364 &msk->sin6_addr)) { 2365 callout_drain(&lle->la_timer); 2366 LLE_WLOCK(lle); 2367 llentry_free(lle); 2368 } 2369 } 2370 } 2371 } 2372 2373 static int 2374 in6_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 2375 { 2376 struct rtentry *rt; 2377 char ip6buf[INET6_ADDRSTRLEN]; 2378 2379 KASSERT(l3addr->sa_family == AF_INET6, 2380 ("sin_family %d", l3addr->sa_family)); 2381 2382 /* XXX rtalloc1 should take a const param */ 2383 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 2384 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2385 struct ifaddr *ifa; 2386 /* 2387 * Create an ND6 cache for an IPv6 neighbor 2388 * that is not covered by our own prefix. 2389 */ 2390 /* XXX ifaof_ifpforaddr should take a const param */ 2391 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2392 if (ifa != NULL) { 2393 ifa_free(ifa); 2394 if (rt != NULL) 2395 RTFREE_LOCKED(rt); 2396 return 0; 2397 } 2398 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2399 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2400 if (rt != NULL) 2401 RTFREE_LOCKED(rt); 2402 return EINVAL; 2403 } 2404 RTFREE_LOCKED(rt); 2405 return 0; 2406 } 2407 2408 static struct llentry * 2409 in6_lltable_lookup(struct lltable *llt, u_int flags, 2410 const struct sockaddr *l3addr) 2411 { 2412 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2413 struct ifnet *ifp = llt->llt_ifp; 2414 struct llentry *lle; 2415 struct llentries *lleh; 2416 u_int hashkey; 2417 2418 IF_AFDATA_LOCK_ASSERT(ifp); 2419 KASSERT(l3addr->sa_family == AF_INET6, 2420 ("sin_family %d", l3addr->sa_family)); 2421 2422 hashkey = sin6->sin6_addr.s6_addr32[3]; 2423 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2424 LIST_FOREACH(lle, lleh, lle_next) { 2425 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2426 if (lle->la_flags & LLE_DELETED) 2427 continue; 2428 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2429 sizeof(struct in6_addr)) == 0) 2430 break; 2431 } 2432 2433 if (lle == NULL) { 2434 if (!(flags & LLE_CREATE)) 2435 return (NULL); 2436 /* 2437 * A route that covers the given address must have 2438 * been installed 1st because we are doing a resolution, 2439 * verify this. 2440 */ 2441 if (!(flags & LLE_IFADDR) && 2442 in6_lltable_rtcheck(ifp, l3addr) != 0) 2443 return NULL; 2444 2445 lle = in6_lltable_new(l3addr, flags); 2446 if (lle == NULL) { 2447 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2448 return NULL; 2449 } 2450 lle->la_flags = flags & ~LLE_CREATE; 2451 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2452 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2453 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2454 } 2455 2456 lle->lle_tbl = llt; 2457 lle->lle_head = lleh; 2458 LIST_INSERT_HEAD(lleh, lle, lle_next); 2459 } else if (flags & LLE_DELETE) { 2460 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2461 LLE_WLOCK(lle); 2462 lle->la_flags = LLE_DELETED; 2463 LLE_WUNLOCK(lle); 2464 #ifdef DIAGNOSTICS 2465 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2466 #endif 2467 } 2468 lle = (void *)-1; 2469 } 2470 if (LLE_IS_VALID(lle)) { 2471 if (flags & LLE_EXCLUSIVE) 2472 LLE_WLOCK(lle); 2473 else 2474 LLE_RLOCK(lle); 2475 } 2476 return (lle); 2477 } 2478 2479 static int 2480 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2481 { 2482 struct ifnet *ifp = llt->llt_ifp; 2483 struct llentry *lle; 2484 /* XXX stack use */ 2485 struct { 2486 struct rt_msghdr rtm; 2487 struct sockaddr_in6 sin6; 2488 /* 2489 * ndp.c assumes that sdl is word aligned 2490 */ 2491 #ifdef __LP64__ 2492 uint32_t pad; 2493 #endif 2494 struct sockaddr_dl sdl; 2495 } ndpc; 2496 int i, error; 2497 2498 /* XXXXX 2499 * current IFNET_RLOCK() is mapped to IFNET_WLOCK() 2500 * so it is okay to use this ASSERT, change it when 2501 * IFNET lock is finalized 2502 */ 2503 IFNET_WLOCK_ASSERT(); 2504 2505 error = 0; 2506 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2507 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2508 struct sockaddr_dl *sdl; 2509 2510 /* skip deleted or invalid entries */ 2511 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2512 continue; 2513 /* Skip if jailed and not a valid IP of the prison. */ 2514 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2515 continue; 2516 /* 2517 * produce a msg made of: 2518 * struct rt_msghdr; 2519 * struct sockaddr_in6 (IPv6) 2520 * struct sockaddr_dl; 2521 */ 2522 bzero(&ndpc, sizeof(ndpc)); 2523 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2524 ndpc.rtm.rtm_version = RTM_VERSION; 2525 ndpc.rtm.rtm_type = RTM_GET; 2526 ndpc.rtm.rtm_flags = RTF_UP; 2527 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2528 ndpc.sin6.sin6_family = AF_INET6; 2529 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2530 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2531 2532 /* publish */ 2533 if (lle->la_flags & LLE_PUB) 2534 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2535 2536 sdl = &ndpc.sdl; 2537 sdl->sdl_family = AF_LINK; 2538 sdl->sdl_len = sizeof(*sdl); 2539 sdl->sdl_alen = ifp->if_addrlen; 2540 sdl->sdl_index = ifp->if_index; 2541 sdl->sdl_type = ifp->if_type; 2542 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2543 ndpc.rtm.rtm_rmx.rmx_expire = 2544 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2545 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2546 if (lle->la_flags & LLE_STATIC) 2547 ndpc.rtm.rtm_flags |= RTF_STATIC; 2548 ndpc.rtm.rtm_index = ifp->if_index; 2549 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2550 if (error) 2551 break; 2552 } 2553 } 2554 return error; 2555 } 2556 2557 void * 2558 in6_domifattach(struct ifnet *ifp) 2559 { 2560 struct in6_ifextra *ext; 2561 2562 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2563 bzero(ext, sizeof(*ext)); 2564 2565 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2566 M_IFADDR, M_WAITOK); 2567 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2568 2569 ext->icmp6_ifstat = 2570 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2571 M_IFADDR, M_WAITOK); 2572 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2573 2574 ext->nd_ifinfo = nd6_ifattach(ifp); 2575 ext->scope6_id = scope6_ifattach(ifp); 2576 ext->lltable = lltable_init(ifp, AF_INET6); 2577 if (ext->lltable != NULL) { 2578 ext->lltable->llt_new = in6_lltable_new; 2579 ext->lltable->llt_free = in6_lltable_free; 2580 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2581 ext->lltable->llt_rtcheck = in6_lltable_rtcheck; 2582 ext->lltable->llt_lookup = in6_lltable_lookup; 2583 ext->lltable->llt_dump = in6_lltable_dump; 2584 } 2585 2586 ext->mld_ifinfo = mld_domifattach(ifp); 2587 2588 return ext; 2589 } 2590 2591 void 2592 in6_domifdetach(struct ifnet *ifp, void *aux) 2593 { 2594 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2595 2596 mld_domifdetach(ifp); 2597 scope6_ifdetach(ext->scope6_id); 2598 nd6_ifdetach(ext->nd_ifinfo); 2599 lltable_free(ext->lltable); 2600 free(ext->in6_ifstat, M_IFADDR); 2601 free(ext->icmp6_ifstat, M_IFADDR); 2602 free(ext, M_IFADDR); 2603 } 2604 2605 /* 2606 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2607 * v4 mapped addr or v4 compat addr 2608 */ 2609 void 2610 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2611 { 2612 2613 bzero(sin, sizeof(*sin)); 2614 sin->sin_len = sizeof(struct sockaddr_in); 2615 sin->sin_family = AF_INET; 2616 sin->sin_port = sin6->sin6_port; 2617 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2618 } 2619 2620 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2621 void 2622 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2623 { 2624 bzero(sin6, sizeof(*sin6)); 2625 sin6->sin6_len = sizeof(struct sockaddr_in6); 2626 sin6->sin6_family = AF_INET6; 2627 sin6->sin6_port = sin->sin_port; 2628 sin6->sin6_addr.s6_addr32[0] = 0; 2629 sin6->sin6_addr.s6_addr32[1] = 0; 2630 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2631 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2632 } 2633 2634 /* Convert sockaddr_in6 into sockaddr_in. */ 2635 void 2636 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2637 { 2638 struct sockaddr_in *sin_p; 2639 struct sockaddr_in6 sin6; 2640 2641 /* 2642 * Save original sockaddr_in6 addr and convert it 2643 * to sockaddr_in. 2644 */ 2645 sin6 = *(struct sockaddr_in6 *)nam; 2646 sin_p = (struct sockaddr_in *)nam; 2647 in6_sin6_2_sin(sin_p, &sin6); 2648 } 2649 2650 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2651 void 2652 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2653 { 2654 struct sockaddr_in *sin_p; 2655 struct sockaddr_in6 *sin6_p; 2656 2657 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 2658 M_WAITOK); 2659 sin_p = (struct sockaddr_in *)*nam; 2660 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2661 free(*nam, M_SONAME); 2662 *nam = (struct sockaddr *)sin6_p; 2663 } 2664