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sys/netinet6/in6.c
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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: releng/8.0/sys/netinet6/in6.c 197239 2009-09-15 22:46:06Z 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 83 #include <net/if.h> 84 #include <net/if_var.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> 106 107 /* 108 * Definitions of some costant IP6 addresses. 109 */ 110 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 111 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 112 const struct in6_addr in6addr_nodelocal_allnodes = 113 IN6ADDR_NODELOCAL_ALLNODES_INIT; 114 const struct in6_addr in6addr_linklocal_allnodes = 115 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 116 const struct in6_addr in6addr_linklocal_allrouters = 117 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 118 const struct in6_addr in6addr_linklocal_allv2routers = 119 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 120 121 const struct in6_addr in6mask0 = IN6MASK0; 122 const struct in6_addr in6mask32 = IN6MASK32; 123 const struct in6_addr in6mask64 = IN6MASK64; 124 const struct in6_addr in6mask96 = IN6MASK96; 125 const struct in6_addr in6mask128 = IN6MASK128; 126 127 const struct sockaddr_in6 sa6_any = 128 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 129 130 static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, 131 struct ifnet *, struct thread *)); 132 static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, 133 struct sockaddr_in6 *, int)); 134 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 135 136 int (*faithprefix_p)(struct in6_addr *); 137 138 139 140 int 141 in6_mask2len(struct in6_addr *mask, u_char *lim0) 142 { 143 int x = 0, y; 144 u_char *lim = lim0, *p; 145 146 /* ignore the scope_id part */ 147 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 148 lim = (u_char *)mask + sizeof(*mask); 149 for (p = (u_char *)mask; p < lim; x++, p++) { 150 if (*p != 0xff) 151 break; 152 } 153 y = 0; 154 if (p < lim) { 155 for (y = 0; y < 8; y++) { 156 if ((*p & (0x80 >> y)) == 0) 157 break; 158 } 159 } 160 161 /* 162 * when the limit pointer is given, do a stricter check on the 163 * remaining bits. 164 */ 165 if (p < lim) { 166 if (y != 0 && (*p & (0x00ff >> y)) != 0) 167 return (-1); 168 for (p = p + 1; p < lim; p++) 169 if (*p != 0) 170 return (-1); 171 } 172 173 return x * 8 + y; 174 } 175 176 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 177 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 178 179 int 180 in6_control(struct socket *so, u_long cmd, caddr_t data, 181 struct ifnet *ifp, struct thread *td) 182 { 183 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 184 struct in6_ifaddr *ia = NULL; 185 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 186 struct sockaddr_in6 *sa6; 187 int error; 188 189 switch (cmd) { 190 case SIOCGETSGCNT_IN6: 191 case SIOCGETMIFCNT_IN6: 192 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 193 } 194 195 switch(cmd) { 196 case SIOCAADDRCTL_POLICY: 197 case SIOCDADDRCTL_POLICY: 198 if (td != NULL) { 199 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 200 if (error) 201 return (error); 202 } 203 return (in6_src_ioctl(cmd, data)); 204 } 205 206 if (ifp == NULL) 207 return (EOPNOTSUPP); 208 209 switch (cmd) { 210 case SIOCSNDFLUSH_IN6: 211 case SIOCSPFXFLUSH_IN6: 212 case SIOCSRTRFLUSH_IN6: 213 case SIOCSDEFIFACE_IN6: 214 case SIOCSIFINFO_FLAGS: 215 case SIOCSIFINFO_IN6: 216 if (td != NULL) { 217 error = priv_check(td, PRIV_NETINET_ND6); 218 if (error) 219 return (error); 220 } 221 /* FALLTHROUGH */ 222 case OSIOCGIFINFO_IN6: 223 case SIOCGIFINFO_IN6: 224 case SIOCGDRLST_IN6: 225 case SIOCGPRLST_IN6: 226 case SIOCGNBRINFO_IN6: 227 case SIOCGDEFIFACE_IN6: 228 return (nd6_ioctl(cmd, data, ifp)); 229 } 230 231 switch (cmd) { 232 case SIOCSIFPREFIX_IN6: 233 case SIOCDIFPREFIX_IN6: 234 case SIOCAIFPREFIX_IN6: 235 case SIOCCIFPREFIX_IN6: 236 case SIOCSGIFPREFIX_IN6: 237 case SIOCGIFPREFIX_IN6: 238 log(LOG_NOTICE, 239 "prefix ioctls are now invalidated. " 240 "please use ifconfig.\n"); 241 return (EOPNOTSUPP); 242 } 243 244 switch (cmd) { 245 case SIOCSSCOPE6: 246 if (td != NULL) { 247 error = priv_check(td, PRIV_NETINET_SCOPE6); 248 if (error) 249 return (error); 250 } 251 return (scope6_set(ifp, 252 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 253 case SIOCGSCOPE6: 254 return (scope6_get(ifp, 255 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 256 case SIOCGSCOPE6DEF: 257 return (scope6_get_default((struct scope6_id *) 258 ifr->ifr_ifru.ifru_scope_id)); 259 } 260 261 switch (cmd) { 262 case SIOCALIFADDR: 263 if (td != NULL) { 264 error = priv_check(td, PRIV_NET_ADDIFADDR); 265 if (error) 266 return (error); 267 } 268 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 269 270 case SIOCDLIFADDR: 271 if (td != NULL) { 272 error = priv_check(td, PRIV_NET_DELIFADDR); 273 if (error) 274 return (error); 275 } 276 /* FALLTHROUGH */ 277 case SIOCGLIFADDR: 278 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 279 } 280 281 /* 282 * Find address for this interface, if it exists. 283 * 284 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 285 * only, and used the first interface address as the target of other 286 * operations (without checking ifra_addr). This was because netinet 287 * code/API assumed at most 1 interface address per interface. 288 * Since IPv6 allows a node to assign multiple addresses 289 * on a single interface, we almost always look and check the 290 * presence of ifra_addr, and reject invalid ones here. 291 * It also decreases duplicated code among SIOC*_IN6 operations. 292 */ 293 switch (cmd) { 294 case SIOCAIFADDR_IN6: 295 case SIOCSIFPHYADDR_IN6: 296 sa6 = &ifra->ifra_addr; 297 break; 298 case SIOCSIFADDR_IN6: 299 case SIOCGIFADDR_IN6: 300 case SIOCSIFDSTADDR_IN6: 301 case SIOCSIFNETMASK_IN6: 302 case SIOCGIFDSTADDR_IN6: 303 case SIOCGIFNETMASK_IN6: 304 case SIOCDIFADDR_IN6: 305 case SIOCGIFPSRCADDR_IN6: 306 case SIOCGIFPDSTADDR_IN6: 307 case SIOCGIFAFLAG_IN6: 308 case SIOCSNDFLUSH_IN6: 309 case SIOCSPFXFLUSH_IN6: 310 case SIOCSRTRFLUSH_IN6: 311 case SIOCGIFALIFETIME_IN6: 312 case SIOCSIFALIFETIME_IN6: 313 case SIOCGIFSTAT_IN6: 314 case SIOCGIFSTAT_ICMP6: 315 sa6 = &ifr->ifr_addr; 316 break; 317 default: 318 sa6 = NULL; 319 break; 320 } 321 if (sa6 && sa6->sin6_family == AF_INET6) { 322 if (sa6->sin6_scope_id != 0) 323 error = sa6_embedscope(sa6, 0); 324 else 325 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 326 if (error != 0) 327 return (error); 328 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 329 &sa6->sin6_addr)) != 0) 330 return (error); 331 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 332 } else 333 ia = NULL; 334 335 switch (cmd) { 336 case SIOCSIFADDR_IN6: 337 case SIOCSIFDSTADDR_IN6: 338 case SIOCSIFNETMASK_IN6: 339 /* 340 * Since IPv6 allows a node to assign multiple addresses 341 * on a single interface, SIOCSIFxxx ioctls are deprecated. 342 */ 343 /* we decided to obsolete this command (20000704) */ 344 error = EINVAL; 345 goto out; 346 347 case SIOCDIFADDR_IN6: 348 /* 349 * for IPv4, we look for existing in_ifaddr here to allow 350 * "ifconfig if0 delete" to remove the first IPv4 address on 351 * the interface. For IPv6, as the spec allows multiple 352 * interface address from the day one, we consider "remove the 353 * first one" semantics to be not preferable. 354 */ 355 if (ia == NULL) { 356 error = EADDRNOTAVAIL; 357 goto out; 358 } 359 /* FALLTHROUGH */ 360 case SIOCAIFADDR_IN6: 361 /* 362 * We always require users to specify a valid IPv6 address for 363 * the corresponding operation. 364 */ 365 if (ifra->ifra_addr.sin6_family != AF_INET6 || 366 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 367 error = EAFNOSUPPORT; 368 goto out; 369 } 370 371 if (td != NULL) { 372 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 373 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 374 if (error) 375 goto out; 376 } 377 break; 378 379 case SIOCGIFADDR_IN6: 380 /* This interface is basically deprecated. use SIOCGIFCONF. */ 381 /* FALLTHROUGH */ 382 case SIOCGIFAFLAG_IN6: 383 case SIOCGIFNETMASK_IN6: 384 case SIOCGIFDSTADDR_IN6: 385 case SIOCGIFALIFETIME_IN6: 386 /* must think again about its semantics */ 387 if (ia == NULL) { 388 error = EADDRNOTAVAIL; 389 goto out; 390 } 391 break; 392 393 case SIOCSIFALIFETIME_IN6: 394 { 395 struct in6_addrlifetime *lt; 396 397 if (td != NULL) { 398 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 399 if (error) 400 goto out; 401 } 402 if (ia == NULL) { 403 error = EADDRNOTAVAIL; 404 goto out; 405 } 406 /* sanity for overflow - beware unsigned */ 407 lt = &ifr->ifr_ifru.ifru_lifetime; 408 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 409 lt->ia6t_vltime + time_second < time_second) { 410 error = EINVAL; 411 goto out; 412 } 413 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 414 lt->ia6t_pltime + time_second < time_second) { 415 error = EINVAL; 416 goto out; 417 } 418 break; 419 } 420 } 421 422 switch (cmd) { 423 case SIOCGIFADDR_IN6: 424 ifr->ifr_addr = ia->ia_addr; 425 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 426 goto out; 427 break; 428 429 case SIOCGIFDSTADDR_IN6: 430 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 431 error = EINVAL; 432 goto out; 433 } 434 /* 435 * XXX: should we check if ifa_dstaddr is NULL and return 436 * an error? 437 */ 438 ifr->ifr_dstaddr = ia->ia_dstaddr; 439 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 440 goto out; 441 break; 442 443 case SIOCGIFNETMASK_IN6: 444 ifr->ifr_addr = ia->ia_prefixmask; 445 break; 446 447 case SIOCGIFAFLAG_IN6: 448 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 449 break; 450 451 case SIOCGIFSTAT_IN6: 452 if (ifp == NULL) { 453 error = EINVAL; 454 goto out; 455 } 456 bzero(&ifr->ifr_ifru.ifru_stat, 457 sizeof(ifr->ifr_ifru.ifru_stat)); 458 ifr->ifr_ifru.ifru_stat = 459 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat; 460 break; 461 462 case SIOCGIFSTAT_ICMP6: 463 if (ifp == NULL) { 464 error = EINVAL; 465 goto out; 466 } 467 bzero(&ifr->ifr_ifru.ifru_icmp6stat, 468 sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 469 ifr->ifr_ifru.ifru_icmp6stat = 470 *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat; 471 break; 472 473 case SIOCGIFALIFETIME_IN6: 474 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 475 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 476 time_t maxexpire; 477 struct in6_addrlifetime *retlt = 478 &ifr->ifr_ifru.ifru_lifetime; 479 480 /* 481 * XXX: adjust expiration time assuming time_t is 482 * signed. 483 */ 484 maxexpire = (-1) & 485 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 486 if (ia->ia6_lifetime.ia6t_vltime < 487 maxexpire - ia->ia6_updatetime) { 488 retlt->ia6t_expire = ia->ia6_updatetime + 489 ia->ia6_lifetime.ia6t_vltime; 490 } else 491 retlt->ia6t_expire = maxexpire; 492 } 493 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 494 time_t maxexpire; 495 struct in6_addrlifetime *retlt = 496 &ifr->ifr_ifru.ifru_lifetime; 497 498 /* 499 * XXX: adjust expiration time assuming time_t is 500 * signed. 501 */ 502 maxexpire = (-1) & 503 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 504 if (ia->ia6_lifetime.ia6t_pltime < 505 maxexpire - ia->ia6_updatetime) { 506 retlt->ia6t_preferred = ia->ia6_updatetime + 507 ia->ia6_lifetime.ia6t_pltime; 508 } else 509 retlt->ia6t_preferred = maxexpire; 510 } 511 break; 512 513 case SIOCSIFALIFETIME_IN6: 514 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 515 /* for sanity */ 516 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 517 ia->ia6_lifetime.ia6t_expire = 518 time_second + ia->ia6_lifetime.ia6t_vltime; 519 } else 520 ia->ia6_lifetime.ia6t_expire = 0; 521 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 522 ia->ia6_lifetime.ia6t_preferred = 523 time_second + ia->ia6_lifetime.ia6t_pltime; 524 } else 525 ia->ia6_lifetime.ia6t_preferred = 0; 526 break; 527 528 case SIOCAIFADDR_IN6: 529 { 530 int i; 531 struct nd_prefixctl pr0; 532 struct nd_prefix *pr; 533 534 /* 535 * first, make or update the interface address structure, 536 * and link it to the list. 537 */ 538 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 539 goto out; 540 if (ia != NULL) 541 ifa_free(&ia->ia_ifa); 542 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 543 == NULL) { 544 /* 545 * this can happen when the user specify the 0 valid 546 * lifetime. 547 */ 548 break; 549 } 550 551 /* 552 * then, make the prefix on-link on the interface. 553 * XXX: we'd rather create the prefix before the address, but 554 * we need at least one address to install the corresponding 555 * interface route, so we configure the address first. 556 */ 557 558 /* 559 * convert mask to prefix length (prefixmask has already 560 * been validated in in6_update_ifa(). 561 */ 562 bzero(&pr0, sizeof(pr0)); 563 pr0.ndpr_ifp = ifp; 564 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 565 NULL); 566 if (pr0.ndpr_plen == 128) { 567 break; /* we don't need to install a host route. */ 568 } 569 pr0.ndpr_prefix = ifra->ifra_addr; 570 /* apply the mask for safety. */ 571 for (i = 0; i < 4; i++) { 572 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 573 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 574 } 575 /* 576 * XXX: since we don't have an API to set prefix (not address) 577 * lifetimes, we just use the same lifetimes as addresses. 578 * The (temporarily) installed lifetimes can be overridden by 579 * later advertised RAs (when accept_rtadv is non 0), which is 580 * an intended behavior. 581 */ 582 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 583 pr0.ndpr_raf_auto = 584 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 585 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 586 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 587 588 /* add the prefix if not yet. */ 589 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 590 /* 591 * nd6_prelist_add will install the corresponding 592 * interface route. 593 */ 594 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 595 goto out; 596 if (pr == NULL) { 597 log(LOG_ERR, "nd6_prelist_add succeeded but " 598 "no prefix\n"); 599 error = EINVAL; 600 goto out; 601 } 602 } 603 604 /* relate the address to the prefix */ 605 if (ia->ia6_ndpr == NULL) { 606 ia->ia6_ndpr = pr; 607 pr->ndpr_refcnt++; 608 609 /* 610 * If this is the first autoconf address from the 611 * prefix, create a temporary address as well 612 * (when required). 613 */ 614 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 615 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 616 int e; 617 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 618 log(LOG_NOTICE, "in6_control: failed " 619 "to create a temporary address, " 620 "errno=%d\n", e); 621 } 622 } 623 } 624 625 /* 626 * this might affect the status of autoconfigured addresses, 627 * that is, this address might make other addresses detached. 628 */ 629 pfxlist_onlink_check(); 630 if (error == 0 && ia) 631 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 632 break; 633 } 634 635 case SIOCDIFADDR_IN6: 636 { 637 struct nd_prefix *pr; 638 639 /* 640 * If the address being deleted is the only one that owns 641 * the corresponding prefix, expire the prefix as well. 642 * XXX: theoretically, we don't have to worry about such 643 * relationship, since we separate the address management 644 * and the prefix management. We do this, however, to provide 645 * as much backward compatibility as possible in terms of 646 * the ioctl operation. 647 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 648 */ 649 pr = ia->ia6_ndpr; 650 in6_purgeaddr(&ia->ia_ifa); 651 if (pr && pr->ndpr_refcnt == 0) 652 prelist_remove(pr); 653 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 654 break; 655 } 656 657 default: 658 if (ifp == NULL || ifp->if_ioctl == 0) { 659 error = EOPNOTSUPP; 660 goto out; 661 } 662 error = (*ifp->if_ioctl)(ifp, cmd, data); 663 goto out; 664 } 665 666 error = 0; 667 out: 668 if (ia != NULL) 669 ifa_free(&ia->ia_ifa); 670 return (error); 671 } 672 673 /* 674 * Update parameters of an IPv6 interface address. 675 * If necessary, a new entry is created and linked into address chains. 676 * This function is separated from in6_control(). 677 * XXX: should this be performed under splnet()? 678 */ 679 int 680 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 681 struct in6_ifaddr *ia, int flags) 682 { 683 int error = 0, hostIsNew = 0, plen = -1; 684 struct sockaddr_in6 dst6; 685 struct in6_addrlifetime *lt; 686 struct in6_multi_mship *imm; 687 struct in6_multi *in6m_sol; 688 struct rtentry *rt; 689 int delay; 690 char ip6buf[INET6_ADDRSTRLEN]; 691 692 /* Validate parameters */ 693 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 694 return (EINVAL); 695 696 /* 697 * The destination address for a p2p link must have a family 698 * of AF_UNSPEC or AF_INET6. 699 */ 700 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 701 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 702 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 703 return (EAFNOSUPPORT); 704 /* 705 * validate ifra_prefixmask. don't check sin6_family, netmask 706 * does not carry fields other than sin6_len. 707 */ 708 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 709 return (EINVAL); 710 /* 711 * Because the IPv6 address architecture is classless, we require 712 * users to specify a (non 0) prefix length (mask) for a new address. 713 * We also require the prefix (when specified) mask is valid, and thus 714 * reject a non-consecutive mask. 715 */ 716 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 717 return (EINVAL); 718 if (ifra->ifra_prefixmask.sin6_len != 0) { 719 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 720 (u_char *)&ifra->ifra_prefixmask + 721 ifra->ifra_prefixmask.sin6_len); 722 if (plen <= 0) 723 return (EINVAL); 724 } else { 725 /* 726 * In this case, ia must not be NULL. We just use its prefix 727 * length. 728 */ 729 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 730 } 731 /* 732 * If the destination address on a p2p interface is specified, 733 * and the address is a scoped one, validate/set the scope 734 * zone identifier. 735 */ 736 dst6 = ifra->ifra_dstaddr; 737 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 738 (dst6.sin6_family == AF_INET6)) { 739 struct in6_addr in6_tmp; 740 u_int32_t zoneid; 741 742 in6_tmp = dst6.sin6_addr; 743 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 744 return (EINVAL); /* XXX: should be impossible */ 745 746 if (dst6.sin6_scope_id != 0) { 747 if (dst6.sin6_scope_id != zoneid) 748 return (EINVAL); 749 } else /* user omit to specify the ID. */ 750 dst6.sin6_scope_id = zoneid; 751 752 /* convert into the internal form */ 753 if (sa6_embedscope(&dst6, 0)) 754 return (EINVAL); /* XXX: should be impossible */ 755 } 756 /* 757 * The destination address can be specified only for a p2p or a 758 * loopback interface. If specified, the corresponding prefix length 759 * must be 128. 760 */ 761 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 762 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 763 /* XXX: noisy message */ 764 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 765 "be specified for a p2p or a loopback IF only\n")); 766 return (EINVAL); 767 } 768 if (plen != 128) { 769 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 770 "be 128 when dstaddr is specified\n")); 771 return (EINVAL); 772 } 773 } 774 /* lifetime consistency check */ 775 lt = &ifra->ifra_lifetime; 776 if (lt->ia6t_pltime > lt->ia6t_vltime) 777 return (EINVAL); 778 if (lt->ia6t_vltime == 0) { 779 /* 780 * the following log might be noisy, but this is a typical 781 * configuration mistake or a tool's bug. 782 */ 783 nd6log((LOG_INFO, 784 "in6_update_ifa: valid lifetime is 0 for %s\n", 785 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 786 787 if (ia == NULL) 788 return (0); /* there's nothing to do */ 789 } 790 791 /* 792 * If this is a new address, allocate a new ifaddr and link it 793 * into chains. 794 */ 795 if (ia == NULL) { 796 hostIsNew = 1; 797 /* 798 * When in6_update_ifa() is called in a process of a received 799 * RA, it is called under an interrupt context. So, we should 800 * call malloc with M_NOWAIT. 801 */ 802 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 803 M_NOWAIT); 804 if (ia == NULL) 805 return (ENOBUFS); 806 bzero((caddr_t)ia, sizeof(*ia)); 807 ifa_init(&ia->ia_ifa); 808 LIST_INIT(&ia->ia6_memberships); 809 /* Initialize the address and masks, and put time stamp */ 810 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 811 ia->ia_addr.sin6_family = AF_INET6; 812 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 813 ia->ia6_createtime = time_second; 814 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 815 /* 816 * XXX: some functions expect that ifa_dstaddr is not 817 * NULL for p2p interfaces. 818 */ 819 ia->ia_ifa.ifa_dstaddr = 820 (struct sockaddr *)&ia->ia_dstaddr; 821 } else { 822 ia->ia_ifa.ifa_dstaddr = NULL; 823 } 824 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 825 ia->ia_ifp = ifp; 826 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 827 IF_ADDR_LOCK(ifp); 828 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 829 IF_ADDR_UNLOCK(ifp); 830 831 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 832 IN6_IFADDR_WLOCK(); 833 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 834 IN6_IFADDR_WUNLOCK(); 835 } 836 837 /* update timestamp */ 838 ia->ia6_updatetime = time_second; 839 840 /* set prefix mask */ 841 if (ifra->ifra_prefixmask.sin6_len) { 842 /* 843 * We prohibit changing the prefix length of an existing 844 * address, because 845 * + such an operation should be rare in IPv6, and 846 * + the operation would confuse prefix management. 847 */ 848 if (ia->ia_prefixmask.sin6_len && 849 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 850 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 851 " existing (%s) address should not be changed\n", 852 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 853 error = EINVAL; 854 goto unlink; 855 } 856 ia->ia_prefixmask = ifra->ifra_prefixmask; 857 } 858 859 /* 860 * If a new destination address is specified, scrub the old one and 861 * install the new destination. Note that the interface must be 862 * p2p or loopback (see the check above.) 863 */ 864 if (dst6.sin6_family == AF_INET6 && 865 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 866 int e; 867 868 if ((ia->ia_flags & IFA_ROUTE) != 0 && 869 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 870 nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 871 "a route to the old destination: %s\n", 872 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 873 /* proceed anyway... */ 874 } else 875 ia->ia_flags &= ~IFA_ROUTE; 876 ia->ia_dstaddr = dst6; 877 } 878 879 /* 880 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 881 * to see if the address is deprecated or invalidated, but initialize 882 * these members for applications. 883 */ 884 ia->ia6_lifetime = ifra->ifra_lifetime; 885 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 886 ia->ia6_lifetime.ia6t_expire = 887 time_second + ia->ia6_lifetime.ia6t_vltime; 888 } else 889 ia->ia6_lifetime.ia6t_expire = 0; 890 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 891 ia->ia6_lifetime.ia6t_preferred = 892 time_second + ia->ia6_lifetime.ia6t_pltime; 893 } else 894 ia->ia6_lifetime.ia6t_preferred = 0; 895 896 /* reset the interface and routing table appropriately. */ 897 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 898 goto unlink; 899 900 /* 901 * configure address flags. 902 */ 903 ia->ia6_flags = ifra->ifra_flags; 904 /* 905 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 906 * userland, make it deprecated. 907 */ 908 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 909 ia->ia6_lifetime.ia6t_pltime = 0; 910 ia->ia6_lifetime.ia6t_preferred = time_second; 911 } 912 /* 913 * Make the address tentative before joining multicast addresses, 914 * so that corresponding MLD responses would not have a tentative 915 * source address. 916 */ 917 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 918 if (hostIsNew && in6if_do_dad(ifp)) 919 ia->ia6_flags |= IN6_IFF_TENTATIVE; 920 921 /* 922 * We are done if we have simply modified an existing address. 923 */ 924 if (!hostIsNew) 925 return (error); 926 927 /* 928 * Beyond this point, we should call in6_purgeaddr upon an error, 929 * not just go to unlink. 930 */ 931 932 /* Join necessary multicast groups */ 933 in6m_sol = NULL; 934 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 935 struct sockaddr_in6 mltaddr, mltmask; 936 struct in6_addr llsol; 937 938 /* join solicited multicast addr for new host id */ 939 bzero(&llsol, sizeof(struct in6_addr)); 940 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 941 llsol.s6_addr32[1] = 0; 942 llsol.s6_addr32[2] = htonl(1); 943 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 944 llsol.s6_addr8[12] = 0xff; 945 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 946 /* XXX: should not happen */ 947 log(LOG_ERR, "in6_update_ifa: " 948 "in6_setscope failed\n"); 949 goto cleanup; 950 } 951 delay = 0; 952 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 953 /* 954 * We need a random delay for DAD on the address 955 * being configured. It also means delaying 956 * transmission of the corresponding MLD report to 957 * avoid report collision. 958 * [draft-ietf-ipv6-rfc2462bis-02.txt] 959 */ 960 delay = arc4random() % 961 (MAX_RTR_SOLICITATION_DELAY * hz); 962 } 963 imm = in6_joingroup(ifp, &llsol, &error, delay); 964 if (imm == NULL) { 965 nd6log((LOG_WARNING, 966 "in6_update_ifa: addmulti failed for " 967 "%s on %s (errno=%d)\n", 968 ip6_sprintf(ip6buf, &llsol), if_name(ifp), 969 error)); 970 goto cleanup; 971 } 972 LIST_INSERT_HEAD(&ia->ia6_memberships, 973 imm, i6mm_chain); 974 in6m_sol = imm->i6mm_maddr; 975 976 bzero(&mltmask, sizeof(mltmask)); 977 mltmask.sin6_len = sizeof(struct sockaddr_in6); 978 mltmask.sin6_family = AF_INET6; 979 mltmask.sin6_addr = in6mask32; 980 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 981 982 /* 983 * join link-local all-nodes address 984 */ 985 bzero(&mltaddr, sizeof(mltaddr)); 986 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 987 mltaddr.sin6_family = AF_INET6; 988 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 989 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 990 0) 991 goto cleanup; /* XXX: should not fail */ 992 993 /* 994 * XXX: do we really need this automatic routes? 995 * We should probably reconsider this stuff. Most applications 996 * actually do not need the routes, since they usually specify 997 * the outgoing interface. 998 */ 999 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1000 if (rt) { 1001 /* XXX: only works in !SCOPEDROUTING case. */ 1002 if (memcmp(&mltaddr.sin6_addr, 1003 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1004 MLTMASK_LEN)) { 1005 RTFREE_LOCKED(rt); 1006 rt = NULL; 1007 } 1008 } 1009 if (!rt) { 1010 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1011 (struct sockaddr *)&ia->ia_addr, 1012 (struct sockaddr *)&mltmask, RTF_UP, 1013 (struct rtentry **)0); 1014 if (error) 1015 goto cleanup; 1016 } else { 1017 RTFREE_LOCKED(rt); 1018 } 1019 1020 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1021 if (!imm) { 1022 nd6log((LOG_WARNING, 1023 "in6_update_ifa: addmulti failed for " 1024 "%s on %s (errno=%d)\n", 1025 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1026 if_name(ifp), error)); 1027 goto cleanup; 1028 } 1029 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1030 1031 /* 1032 * join node information group address 1033 */ 1034 delay = 0; 1035 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1036 /* 1037 * The spec doesn't say anything about delay for this 1038 * group, but the same logic should apply. 1039 */ 1040 delay = arc4random() % 1041 (MAX_RTR_SOLICITATION_DELAY * hz); 1042 } 1043 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 1044 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 1045 delay); /* XXX jinmei */ 1046 if (!imm) { 1047 nd6log((LOG_WARNING, "in6_update_ifa: " 1048 "addmulti failed for %s on %s " 1049 "(errno=%d)\n", 1050 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1051 if_name(ifp), error)); 1052 /* XXX not very fatal, go on... */ 1053 } else { 1054 LIST_INSERT_HEAD(&ia->ia6_memberships, 1055 imm, i6mm_chain); 1056 } 1057 } 1058 1059 /* 1060 * join interface-local all-nodes address. 1061 * (ff01::1%ifN, and ff01::%ifN/32) 1062 */ 1063 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1064 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) 1065 != 0) 1066 goto cleanup; /* XXX: should not fail */ 1067 /* XXX: again, do we really need the route? */ 1068 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1069 if (rt) { 1070 if (memcmp(&mltaddr.sin6_addr, 1071 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1072 MLTMASK_LEN)) { 1073 RTFREE_LOCKED(rt); 1074 rt = NULL; 1075 } 1076 } 1077 if (!rt) { 1078 error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1079 (struct sockaddr *)&ia->ia_addr, 1080 (struct sockaddr *)&mltmask, RTF_UP, 1081 (struct rtentry **)0); 1082 if (error) 1083 goto cleanup; 1084 } else 1085 RTFREE_LOCKED(rt); 1086 1087 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1088 if (!imm) { 1089 nd6log((LOG_WARNING, "in6_update_ifa: " 1090 "addmulti failed for %s on %s " 1091 "(errno=%d)\n", 1092 ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1093 if_name(ifp), error)); 1094 goto cleanup; 1095 } 1096 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1097 #undef MLTMASK_LEN 1098 } 1099 1100 /* 1101 * Perform DAD, if needed. 1102 * XXX It may be of use, if we can administratively 1103 * disable DAD. 1104 */ 1105 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1106 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1107 { 1108 int mindelay, maxdelay; 1109 1110 delay = 0; 1111 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1112 /* 1113 * We need to impose a delay before sending an NS 1114 * for DAD. Check if we also needed a delay for the 1115 * corresponding MLD message. If we did, the delay 1116 * should be larger than the MLD delay (this could be 1117 * relaxed a bit, but this simple logic is at least 1118 * safe). 1119 * XXX: Break data hiding guidelines and look at 1120 * state for the solicited multicast group. 1121 */ 1122 mindelay = 0; 1123 if (in6m_sol != NULL && 1124 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1125 mindelay = in6m_sol->in6m_timer; 1126 } 1127 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1128 if (maxdelay - mindelay == 0) 1129 delay = 0; 1130 else { 1131 delay = 1132 (arc4random() % (maxdelay - mindelay)) + 1133 mindelay; 1134 } 1135 } 1136 nd6_dad_start((struct ifaddr *)ia, delay); 1137 } 1138 1139 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1140 ifa_free(&ia->ia_ifa); 1141 return (error); 1142 1143 unlink: 1144 /* 1145 * XXX: if a change of an existing address failed, keep the entry 1146 * anyway. 1147 */ 1148 if (hostIsNew) { 1149 in6_unlink_ifa(ia, ifp); 1150 ifa_free(&ia->ia_ifa); 1151 } 1152 return (error); 1153 1154 cleanup: 1155 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1156 ifa_free(&ia->ia_ifa); 1157 in6_purgeaddr(&ia->ia_ifa); 1158 return error; 1159 } 1160 1161 void 1162 in6_purgeaddr(struct ifaddr *ifa) 1163 { 1164 struct ifnet *ifp = ifa->ifa_ifp; 1165 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1166 struct in6_multi_mship *imm; 1167 struct sockaddr_in6 mltaddr, mltmask; 1168 struct rtentry rt0; 1169 struct sockaddr_dl gateway; 1170 struct sockaddr_in6 mask, addr; 1171 int plen, error; 1172 struct rtentry *rt; 1173 struct ifaddr *ifa0, *nifa; 1174 1175 /* 1176 * find another IPv6 address as the gateway for the 1177 * link-local and node-local all-nodes multicast 1178 * address routes 1179 */ 1180 IF_ADDR_LOCK(ifp); 1181 TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) { 1182 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1183 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1184 &ia->ia_addr.sin6_addr, 1185 sizeof(struct in6_addr)) == 0) 1186 continue; 1187 else 1188 break; 1189 } 1190 if (ifa0 != NULL) 1191 ifa_ref(ifa0); 1192 IF_ADDR_UNLOCK(ifp); 1193 1194 /* 1195 * Remove the loopback route to the interface address. 1196 * The check for the current setting of "nd6_useloopback" 1197 * is not needed. 1198 */ 1199 error = ifa_del_loopback_route((struct ifaddr *)ia, 1200 (struct sockaddr *)&ia->ia_addr); 1201 1202 /* stop DAD processing */ 1203 nd6_dad_stop(ifa); 1204 1205 IF_AFDATA_LOCK(ifp); 1206 lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR), 1207 (struct sockaddr *)&ia->ia_addr); 1208 IF_AFDATA_UNLOCK(ifp); 1209 1210 /* 1211 * initialize for rtmsg generation 1212 */ 1213 bzero(&gateway, sizeof(gateway)); 1214 gateway.sdl_len = sizeof(gateway); 1215 gateway.sdl_family = AF_LINK; 1216 gateway.sdl_nlen = 0; 1217 gateway.sdl_alen = ifp->if_addrlen; 1218 /* */ 1219 bzero(&rt0, sizeof(rt0)); 1220 rt0.rt_gateway = (struct sockaddr *)&gateway; 1221 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1222 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1223 rt_mask(&rt0) = (struct sockaddr *)&mask; 1224 rt_key(&rt0) = (struct sockaddr *)&addr; 1225 rt0.rt_flags = RTF_HOST | RTF_STATIC; 1226 rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0); 1227 1228 /* 1229 * leave from multicast groups we have joined for the interface 1230 */ 1231 while ((imm = ia->ia6_memberships.lh_first) != NULL) { 1232 LIST_REMOVE(imm, i6mm_chain); 1233 in6_leavegroup(imm); 1234 } 1235 1236 /* 1237 * remove the link-local all-nodes address 1238 */ 1239 bzero(&mltmask, sizeof(mltmask)); 1240 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1241 mltmask.sin6_family = AF_INET6; 1242 mltmask.sin6_addr = in6mask32; 1243 1244 bzero(&mltaddr, sizeof(mltaddr)); 1245 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1246 mltaddr.sin6_family = AF_INET6; 1247 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1248 1249 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1250 0) 1251 goto cleanup; 1252 1253 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1254 if (rt != NULL && rt->rt_gateway != NULL && 1255 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1256 &ia->ia_addr.sin6_addr, 1257 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1258 /* 1259 * if no more IPv6 address exists on this interface 1260 * then remove the multicast address route 1261 */ 1262 if (ifa0 == NULL) { 1263 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1264 sizeof(mltaddr.sin6_addr)); 1265 RTFREE_LOCKED(rt); 1266 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1267 (struct sockaddr *)&ia->ia_addr, 1268 (struct sockaddr *)&mltmask, RTF_UP, 1269 (struct rtentry **)0); 1270 if (error) 1271 log(LOG_INFO, "in6_purgeaddr: link-local all-nodes" 1272 "multicast address deletion error\n"); 1273 } else { 1274 /* 1275 * replace the gateway of the route 1276 */ 1277 struct sockaddr_in6 sa; 1278 1279 bzero(&sa, sizeof(sa)); 1280 sa.sin6_len = sizeof(struct sockaddr_in6); 1281 sa.sin6_family = AF_INET6; 1282 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1283 sizeof(sa.sin6_addr)); 1284 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1285 memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1286 RTFREE_LOCKED(rt); 1287 } 1288 } else { 1289 if (rt != NULL) 1290 RTFREE_LOCKED(rt); 1291 } 1292 1293 /* 1294 * remove the node-local all-nodes address 1295 */ 1296 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1297 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1298 0) 1299 goto cleanup; 1300 1301 rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1302 if (rt != NULL && rt->rt_gateway != NULL && 1303 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1304 &ia->ia_addr.sin6_addr, 1305 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1306 /* 1307 * if no more IPv6 address exists on this interface 1308 * then remove the multicast address route 1309 */ 1310 if (ifa0 == NULL) { 1311 memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1312 sizeof(mltaddr.sin6_addr)); 1313 1314 RTFREE_LOCKED(rt); 1315 error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1316 (struct sockaddr *)&ia->ia_addr, 1317 (struct sockaddr *)&mltmask, RTF_UP, 1318 (struct rtentry **)0); 1319 1320 if (error) 1321 log(LOG_INFO, "in6_purgeaddr: node-local all-nodes" 1322 "multicast address deletion error\n"); 1323 } else { 1324 /* 1325 * replace the gateway of the route 1326 */ 1327 struct sockaddr_in6 sa; 1328 1329 bzero(&sa, sizeof(sa)); 1330 sa.sin6_len = sizeof(struct sockaddr_in6); 1331 sa.sin6_family = AF_INET6; 1332 memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1333 sizeof(sa.sin6_addr)); 1334 in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1335 memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1336 RTFREE_LOCKED(rt); 1337 } 1338 } else { 1339 if (rt != NULL) 1340 RTFREE_LOCKED(rt); 1341 } 1342 1343 cleanup: 1344 1345 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1346 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1347 int error; 1348 struct sockaddr *dstaddr; 1349 1350 /* 1351 * use the interface address if configuring an 1352 * interface address with a /128 prefix len 1353 */ 1354 if (ia->ia_dstaddr.sin6_family == AF_INET6) 1355 dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 1356 else 1357 dstaddr = (struct sockaddr *)&ia->ia_addr; 1358 1359 error = rtrequest(RTM_DELETE, 1360 (struct sockaddr *)dstaddr, 1361 (struct sockaddr *)&ia->ia_addr, 1362 (struct sockaddr *)&ia->ia_prefixmask, 1363 ia->ia_flags | RTF_HOST, NULL); 1364 if (error != 0) 1365 return; 1366 ia->ia_flags &= ~IFA_ROUTE; 1367 } 1368 if (ifa0 != NULL) 1369 ifa_free(ifa0); 1370 1371 in6_unlink_ifa(ia, ifp); 1372 } 1373 1374 static void 1375 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1376 { 1377 int s = splnet(); 1378 1379 IF_ADDR_LOCK(ifp); 1380 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1381 IF_ADDR_UNLOCK(ifp); 1382 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1383 1384 /* 1385 * Defer the release of what might be the last reference to the 1386 * in6_ifaddr so that it can't be freed before the remainder of the 1387 * cleanup. 1388 */ 1389 IN6_IFADDR_WLOCK(); 1390 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1391 IN6_IFADDR_WUNLOCK(); 1392 1393 /* 1394 * Release the reference to the base prefix. There should be a 1395 * positive reference. 1396 */ 1397 if (ia->ia6_ndpr == NULL) { 1398 nd6log((LOG_NOTICE, 1399 "in6_unlink_ifa: autoconf'ed address " 1400 "%p has no prefix\n", ia)); 1401 } else { 1402 ia->ia6_ndpr->ndpr_refcnt--; 1403 ia->ia6_ndpr = NULL; 1404 } 1405 1406 /* 1407 * Also, if the address being removed is autoconf'ed, call 1408 * pfxlist_onlink_check() since the release might affect the status of 1409 * other (detached) addresses. 1410 */ 1411 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1412 pfxlist_onlink_check(); 1413 } 1414 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1415 splx(s); 1416 } 1417 1418 void 1419 in6_purgeif(struct ifnet *ifp) 1420 { 1421 struct ifaddr *ifa, *nifa; 1422 1423 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1424 if (ifa->ifa_addr->sa_family != AF_INET6) 1425 continue; 1426 in6_purgeaddr(ifa); 1427 } 1428 1429 in6_ifdetach(ifp); 1430 } 1431 1432 /* 1433 * SIOC[GAD]LIFADDR. 1434 * SIOCGLIFADDR: get first address. (?) 1435 * SIOCGLIFADDR with IFLR_PREFIX: 1436 * get first address that matches the specified prefix. 1437 * SIOCALIFADDR: add the specified address. 1438 * SIOCALIFADDR with IFLR_PREFIX: 1439 * add the specified prefix, filling hostid part from 1440 * the first link-local address. prefixlen must be <= 64. 1441 * SIOCDLIFADDR: delete the specified address. 1442 * SIOCDLIFADDR with IFLR_PREFIX: 1443 * delete the first address that matches the specified prefix. 1444 * return values: 1445 * EINVAL on invalid parameters 1446 * EADDRNOTAVAIL on prefix match failed/specified address not found 1447 * other values may be returned from in6_ioctl() 1448 * 1449 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1450 * this is to accomodate address naming scheme other than RFC2374, 1451 * in the future. 1452 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1453 * address encoding scheme. (see figure on page 8) 1454 */ 1455 static int 1456 in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1457 struct ifnet *ifp, struct thread *td) 1458 { 1459 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1460 struct ifaddr *ifa; 1461 struct sockaddr *sa; 1462 1463 /* sanity checks */ 1464 if (!data || !ifp) { 1465 panic("invalid argument to in6_lifaddr_ioctl"); 1466 /* NOTREACHED */ 1467 } 1468 1469 switch (cmd) { 1470 case SIOCGLIFADDR: 1471 /* address must be specified on GET with IFLR_PREFIX */ 1472 if ((iflr->flags & IFLR_PREFIX) == 0) 1473 break; 1474 /* FALLTHROUGH */ 1475 case SIOCALIFADDR: 1476 case SIOCDLIFADDR: 1477 /* address must be specified on ADD and DELETE */ 1478 sa = (struct sockaddr *)&iflr->addr; 1479 if (sa->sa_family != AF_INET6) 1480 return EINVAL; 1481 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1482 return EINVAL; 1483 /* XXX need improvement */ 1484 sa = (struct sockaddr *)&iflr->dstaddr; 1485 if (sa->sa_family && sa->sa_family != AF_INET6) 1486 return EINVAL; 1487 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1488 return EINVAL; 1489 break; 1490 default: /* shouldn't happen */ 1491 #if 0 1492 panic("invalid cmd to in6_lifaddr_ioctl"); 1493 /* NOTREACHED */ 1494 #else 1495 return EOPNOTSUPP; 1496 #endif 1497 } 1498 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1499 return EINVAL; 1500 1501 switch (cmd) { 1502 case SIOCALIFADDR: 1503 { 1504 struct in6_aliasreq ifra; 1505 struct in6_addr *hostid = NULL; 1506 int prefixlen; 1507 1508 ifa = NULL; 1509 if ((iflr->flags & IFLR_PREFIX) != 0) { 1510 struct sockaddr_in6 *sin6; 1511 1512 /* 1513 * hostid is to fill in the hostid part of the 1514 * address. hostid points to the first link-local 1515 * address attached to the interface. 1516 */ 1517 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1518 if (!ifa) 1519 return EADDRNOTAVAIL; 1520 hostid = IFA_IN6(ifa); 1521 1522 /* prefixlen must be <= 64. */ 1523 if (64 < iflr->prefixlen) 1524 return EINVAL; 1525 prefixlen = iflr->prefixlen; 1526 1527 /* hostid part must be zero. */ 1528 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1529 if (sin6->sin6_addr.s6_addr32[2] != 0 || 1530 sin6->sin6_addr.s6_addr32[3] != 0) { 1531 return EINVAL; 1532 } 1533 } else 1534 prefixlen = iflr->prefixlen; 1535 1536 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1537 bzero(&ifra, sizeof(ifra)); 1538 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 1539 1540 bcopy(&iflr->addr, &ifra.ifra_addr, 1541 ((struct sockaddr *)&iflr->addr)->sa_len); 1542 if (hostid) { 1543 /* fill in hostid part */ 1544 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1545 hostid->s6_addr32[2]; 1546 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1547 hostid->s6_addr32[3]; 1548 } 1549 1550 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 1551 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1552 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1553 if (hostid) { 1554 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1555 hostid->s6_addr32[2]; 1556 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1557 hostid->s6_addr32[3]; 1558 } 1559 } 1560 if (ifa != NULL) 1561 ifa_free(ifa); 1562 1563 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1564 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1565 1566 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1567 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1568 } 1569 case SIOCGLIFADDR: 1570 case SIOCDLIFADDR: 1571 { 1572 struct in6_ifaddr *ia; 1573 struct in6_addr mask, candidate, match; 1574 struct sockaddr_in6 *sin6; 1575 int cmp; 1576 1577 bzero(&mask, sizeof(mask)); 1578 if (iflr->flags & IFLR_PREFIX) { 1579 /* lookup a prefix rather than address. */ 1580 in6_prefixlen2mask(&mask, iflr->prefixlen); 1581 1582 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1583 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1584 match.s6_addr32[0] &= mask.s6_addr32[0]; 1585 match.s6_addr32[1] &= mask.s6_addr32[1]; 1586 match.s6_addr32[2] &= mask.s6_addr32[2]; 1587 match.s6_addr32[3] &= mask.s6_addr32[3]; 1588 1589 /* if you set extra bits, that's wrong */ 1590 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1591 return EINVAL; 1592 1593 cmp = 1; 1594 } else { 1595 if (cmd == SIOCGLIFADDR) { 1596 /* on getting an address, take the 1st match */ 1597 cmp = 0; /* XXX */ 1598 } else { 1599 /* on deleting an address, do exact match */ 1600 in6_prefixlen2mask(&mask, 128); 1601 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1602 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1603 1604 cmp = 1; 1605 } 1606 } 1607 1608 IF_ADDR_LOCK(ifp); 1609 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1610 if (ifa->ifa_addr->sa_family != AF_INET6) 1611 continue; 1612 if (!cmp) 1613 break; 1614 1615 /* 1616 * XXX: this is adhoc, but is necessary to allow 1617 * a user to specify fe80::/64 (not /10) for a 1618 * link-local address. 1619 */ 1620 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1621 in6_clearscope(&candidate); 1622 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1623 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1624 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1625 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1626 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1627 break; 1628 } 1629 IF_ADDR_UNLOCK(ifp); 1630 if (!ifa) 1631 return EADDRNOTAVAIL; 1632 ia = ifa2ia6(ifa); 1633 1634 if (cmd == SIOCGLIFADDR) { 1635 int error; 1636 1637 /* fill in the if_laddrreq structure */ 1638 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1639 error = sa6_recoverscope( 1640 (struct sockaddr_in6 *)&iflr->addr); 1641 if (error != 0) 1642 return (error); 1643 1644 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1645 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1646 ia->ia_dstaddr.sin6_len); 1647 error = sa6_recoverscope( 1648 (struct sockaddr_in6 *)&iflr->dstaddr); 1649 if (error != 0) 1650 return (error); 1651 } else 1652 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1653 1654 iflr->prefixlen = 1655 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1656 1657 iflr->flags = ia->ia6_flags; /* XXX */ 1658 1659 return 0; 1660 } else { 1661 struct in6_aliasreq ifra; 1662 1663 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1664 bzero(&ifra, sizeof(ifra)); 1665 bcopy(iflr->iflr_name, ifra.ifra_name, 1666 sizeof(ifra.ifra_name)); 1667 1668 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1669 ia->ia_addr.sin6_len); 1670 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1671 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1672 ia->ia_dstaddr.sin6_len); 1673 } else { 1674 bzero(&ifra.ifra_dstaddr, 1675 sizeof(ifra.ifra_dstaddr)); 1676 } 1677 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1678 ia->ia_prefixmask.sin6_len); 1679 1680 ifra.ifra_flags = ia->ia6_flags; 1681 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1682 ifp, td); 1683 } 1684 } 1685 } 1686 1687 return EOPNOTSUPP; /* just for safety */ 1688 } 1689 1690 /* 1691 * Initialize an interface's intetnet6 address 1692 * and routing table entry. 1693 */ 1694 static int 1695 in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1696 struct sockaddr_in6 *sin6, int newhost) 1697 { 1698 int error = 0, plen, ifacount = 0; 1699 int s = splimp(); 1700 struct ifaddr *ifa; 1701 1702 /* 1703 * Give the interface a chance to initialize 1704 * if this is its first address, 1705 * and to validate the address if necessary. 1706 */ 1707 IF_ADDR_LOCK(ifp); 1708 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1709 if (ifa->ifa_addr->sa_family != AF_INET6) 1710 continue; 1711 ifacount++; 1712 } 1713 IF_ADDR_UNLOCK(ifp); 1714 1715 ia->ia_addr = *sin6; 1716 1717 if (ifacount <= 1 && ifp->if_ioctl) { 1718 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1719 if (error) { 1720 splx(s); 1721 return (error); 1722 } 1723 } 1724 splx(s); 1725 1726 ia->ia_ifa.ifa_metric = ifp->if_metric; 1727 1728 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1729 1730 /* 1731 * Special case: 1732 * If a new destination address is specified for a point-to-point 1733 * interface, install a route to the destination as an interface 1734 * direct route. 1735 * XXX: the logic below rejects assigning multiple addresses on a p2p 1736 * interface that share the same destination. 1737 */ 1738 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1739 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1740 ia->ia_dstaddr.sin6_family == AF_INET6) { 1741 int rtflags = RTF_UP | RTF_HOST; 1742 1743 error = rtrequest(RTM_ADD, 1744 (struct sockaddr *)&ia->ia_dstaddr, 1745 (struct sockaddr *)&ia->ia_addr, 1746 (struct sockaddr *)&ia->ia_prefixmask, 1747 ia->ia_flags | rtflags, NULL); 1748 if (error != 0) 1749 return (error); 1750 ia->ia_flags |= IFA_ROUTE; 1751 } 1752 1753 /* 1754 * add a loopback route to self 1755 */ 1756 if (!(ia->ia_flags & IFA_ROUTE) 1757 && (V_nd6_useloopback 1758 || (ifp->if_flags & IFF_LOOPBACK))) { 1759 error = ifa_add_loopback_route((struct ifaddr *)ia, 1760 (struct sockaddr *)&ia->ia_addr); 1761 } 1762 1763 /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1764 if (newhost) { 1765 struct llentry *ln; 1766 struct rtentry rt; 1767 struct sockaddr_dl gateway; 1768 struct sockaddr_in6 mask, addr; 1769 1770 IF_AFDATA_LOCK(ifp); 1771 ia->ia_ifa.ifa_rtrequest = NULL; 1772 1773 /* XXX QL 1774 * we need to report rt_newaddrmsg 1775 */ 1776 ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE), 1777 (struct sockaddr *)&ia->ia_addr); 1778 IF_AFDATA_UNLOCK(ifp); 1779 if (ln != NULL) { 1780 ln->la_expire = 0; /* for IPv6 this means permanent */ 1781 ln->ln_state = ND6_LLINFO_REACHABLE; 1782 /* 1783 * initialize for rtmsg generation 1784 */ 1785 bzero(&gateway, sizeof(gateway)); 1786 gateway.sdl_len = sizeof(gateway); 1787 gateway.sdl_family = AF_LINK; 1788 gateway.sdl_nlen = 0; 1789 gateway.sdl_alen = 6; 1790 memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr)); 1791 /* */ 1792 LLE_WUNLOCK(ln); 1793 } 1794 1795 bzero(&rt, sizeof(rt)); 1796 rt.rt_gateway = (struct sockaddr *)&gateway; 1797 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1798 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1799 rt_mask(&rt) = (struct sockaddr *)&mask; 1800 rt_key(&rt) = (struct sockaddr *)&addr; 1801 rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 1802 rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt); 1803 } 1804 1805 return (error); 1806 } 1807 1808 /* 1809 * Find an IPv6 interface link-local address specific to an interface. 1810 * ifaddr is returned referenced. 1811 */ 1812 struct in6_ifaddr * 1813 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1814 { 1815 struct ifaddr *ifa; 1816 1817 IF_ADDR_LOCK(ifp); 1818 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1819 if (ifa->ifa_addr->sa_family != AF_INET6) 1820 continue; 1821 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1822 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1823 ignoreflags) != 0) 1824 continue; 1825 ifa_ref(ifa); 1826 break; 1827 } 1828 } 1829 IF_ADDR_UNLOCK(ifp); 1830 1831 return ((struct in6_ifaddr *)ifa); 1832 } 1833 1834 1835 /* 1836 * find the internet address corresponding to a given interface and address. 1837 * ifaddr is returned referenced. 1838 */ 1839 struct in6_ifaddr * 1840 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1841 { 1842 struct ifaddr *ifa; 1843 1844 IF_ADDR_LOCK(ifp); 1845 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1846 if (ifa->ifa_addr->sa_family != AF_INET6) 1847 continue; 1848 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1849 ifa_ref(ifa); 1850 break; 1851 } 1852 } 1853 IF_ADDR_UNLOCK(ifp); 1854 1855 return ((struct in6_ifaddr *)ifa); 1856 } 1857 1858 /* 1859 * Convert IP6 address to printable (loggable) representation. Caller 1860 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1861 */ 1862 static char digits[] = "0123456789abcdef"; 1863 char * 1864 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1865 { 1866 int i; 1867 char *cp; 1868 const u_int16_t *a = (const u_int16_t *)addr; 1869 const u_int8_t *d; 1870 int dcolon = 0, zero = 0; 1871 1872 cp = ip6buf; 1873 1874 for (i = 0; i < 8; i++) { 1875 if (dcolon == 1) { 1876 if (*a == 0) { 1877 if (i == 7) 1878 *cp++ = ':'; 1879 a++; 1880 continue; 1881 } else 1882 dcolon = 2; 1883 } 1884 if (*a == 0) { 1885 if (dcolon == 0 && *(a + 1) == 0) { 1886 if (i == 0) 1887 *cp++ = ':'; 1888 *cp++ = ':'; 1889 dcolon = 1; 1890 } else { 1891 *cp++ = ''; 1892 *cp++ = ':'; 1893 } 1894 a++; 1895 continue; 1896 } 1897 d = (const u_char *)a; 1898 /* Try to eliminate leading zeros in printout like in :0001. */ 1899 zero = 1; 1900 *cp = digits[*d >> 4]; 1901 if (*cp != '') { 1902 zero = 0; 1903 cp++; 1904 } 1905 *cp = digits[*d++ & 0xf]; 1906 if (zero == 0 || (*cp != '')) { 1907 zero = 0; 1908 cp++; 1909 } 1910 *cp = digits[*d >> 4]; 1911 if (zero == 0 || (*cp != '')) { 1912 zero = 0; 1913 cp++; 1914 } 1915 *cp++ = digits[*d & 0xf]; 1916 *cp++ = ':'; 1917 a++; 1918 } 1919 *--cp = '\0'; 1920 return (ip6buf); 1921 } 1922 1923 int 1924 in6_localaddr(struct in6_addr *in6) 1925 { 1926 struct in6_ifaddr *ia; 1927 1928 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1929 return 1; 1930 1931 IN6_IFADDR_RLOCK(); 1932 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1933 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1934 &ia->ia_prefixmask.sin6_addr)) { 1935 IN6_IFADDR_RUNLOCK(); 1936 return 1; 1937 } 1938 } 1939 IN6_IFADDR_RUNLOCK(); 1940 1941 return (0); 1942 } 1943 1944 int 1945 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1946 { 1947 struct in6_ifaddr *ia; 1948 1949 IN6_IFADDR_RLOCK(); 1950 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1951 if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 1952 &sa6->sin6_addr) && 1953 (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { 1954 IN6_IFADDR_RUNLOCK(); 1955 return (1); /* true */ 1956 } 1957 1958 /* XXX: do we still have to go thru the rest of the list? */ 1959 } 1960 IN6_IFADDR_RUNLOCK(); 1961 1962 return (0); /* false */ 1963 } 1964 1965 /* 1966 * return length of part which dst and src are equal 1967 * hard coding... 1968 */ 1969 int 1970 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1971 { 1972 int match = 0; 1973 u_char *s = (u_char *)src, *d = (u_char *)dst; 1974 u_char *lim = s + 16, r; 1975 1976 while (s < lim) 1977 if ((r = (*d++ ^ *s++)) != 0) { 1978 while (r < 128) { 1979 match++; 1980 r <<= 1; 1981 } 1982 break; 1983 } else 1984 match += 8; 1985 return match; 1986 } 1987 1988 /* XXX: to be scope conscious */ 1989 int 1990 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1991 { 1992 int bytelen, bitlen; 1993 1994 /* sanity check */ 1995 if (0 > len || len > 128) { 1996 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1997 len); 1998 return (0); 1999 } 2000 2001 bytelen = len / 8; 2002 bitlen = len % 8; 2003 2004 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2005 return (0); 2006 if (bitlen != 0 && 2007 p1->s6_addr[bytelen] >> (8 - bitlen) != 2008 p2->s6_addr[bytelen] >> (8 - bitlen)) 2009 return (0); 2010 2011 return (1); 2012 } 2013 2014 void 2015 in6_prefixlen2mask(struct in6_addr *maskp, int len) 2016 { 2017 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 2018 int bytelen, bitlen, i; 2019 2020 /* sanity check */ 2021 if (0 > len || len > 128) { 2022 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 2023 len); 2024 return; 2025 } 2026 2027 bzero(maskp, sizeof(*maskp)); 2028 bytelen = len / 8; 2029 bitlen = len % 8; 2030 for (i = 0; i < bytelen; i++) 2031 maskp->s6_addr[i] = 0xff; 2032 if (bitlen) 2033 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2034 } 2035 2036 /* 2037 * return the best address out of the same scope. if no address was 2038 * found, return the first valid address from designated IF. 2039 */ 2040 struct in6_ifaddr * 2041 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2042 { 2043 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2044 struct ifaddr *ifa; 2045 struct in6_ifaddr *besta = 0; 2046 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2047 2048 dep[0] = dep[1] = NULL; 2049 2050 /* 2051 * We first look for addresses in the same scope. 2052 * If there is one, return it. 2053 * If two or more, return one which matches the dst longest. 2054 * If none, return one of global addresses assigned other ifs. 2055 */ 2056 IF_ADDR_LOCK(ifp); 2057 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2058 if (ifa->ifa_addr->sa_family != AF_INET6) 2059 continue; 2060 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2061 continue; /* XXX: is there any case to allow anycast? */ 2062 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2063 continue; /* don't use this interface */ 2064 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2065 continue; 2066 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2067 if (V_ip6_use_deprecated) 2068 dep[0] = (struct in6_ifaddr *)ifa; 2069 continue; 2070 } 2071 2072 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2073 /* 2074 * call in6_matchlen() as few as possible 2075 */ 2076 if (besta) { 2077 if (blen == -1) 2078 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2079 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2080 if (tlen > blen) { 2081 blen = tlen; 2082 besta = (struct in6_ifaddr *)ifa; 2083 } 2084 } else 2085 besta = (struct in6_ifaddr *)ifa; 2086 } 2087 } 2088 if (besta) { 2089 ifa_ref(&besta->ia_ifa); 2090 IF_ADDR_UNLOCK(ifp); 2091 return (besta); 2092 } 2093 IF_ADDR_UNLOCK(ifp); 2094 2095 IN6_IFADDR_RLOCK(); 2096 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2097 if (ifa->ifa_addr->sa_family != AF_INET6) 2098 continue; 2099 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2100 continue; /* XXX: is there any case to allow anycast? */ 2101 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2102 continue; /* don't use this interface */ 2103 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2104 continue; 2105 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2106 if (V_ip6_use_deprecated) 2107 dep[1] = (struct in6_ifaddr *)ifa; 2108 continue; 2109 } 2110 2111 if (ifa != NULL) 2112 ifa_ref(ifa); 2113 IN6_IFADDR_RUNLOCK(); 2114 return (struct in6_ifaddr *)ifa; 2115 } 2116 IN6_IFADDR_RUNLOCK(); 2117 2118 /* use the last-resort values, that are, deprecated addresses */ 2119 if (dep[0]) 2120 return dep[0]; 2121 if (dep[1]) 2122 return dep[1]; 2123 2124 return NULL; 2125 } 2126 2127 /* 2128 * perform DAD when interface becomes IFF_UP. 2129 */ 2130 void 2131 in6_if_up(struct ifnet *ifp) 2132 { 2133 struct ifaddr *ifa; 2134 struct in6_ifaddr *ia; 2135 2136 IF_ADDR_LOCK(ifp); 2137 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2138 if (ifa->ifa_addr->sa_family != AF_INET6) 2139 continue; 2140 ia = (struct in6_ifaddr *)ifa; 2141 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2142 /* 2143 * The TENTATIVE flag was likely set by hand 2144 * beforehand, implicitly indicating the need for DAD. 2145 * We may be able to skip the random delay in this 2146 * case, but we impose delays just in case. 2147 */ 2148 nd6_dad_start(ifa, 2149 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2150 } 2151 } 2152 IF_ADDR_UNLOCK(ifp); 2153 2154 /* 2155 * special cases, like 6to4, are handled in in6_ifattach 2156 */ 2157 in6_ifattach(ifp, NULL); 2158 } 2159 2160 int 2161 in6if_do_dad(struct ifnet *ifp) 2162 { 2163 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2164 return (0); 2165 2166 switch (ifp->if_type) { 2167 #ifdef IFT_DUMMY 2168 case IFT_DUMMY: 2169 #endif 2170 case IFT_FAITH: 2171 /* 2172 * These interfaces do not have the IFF_LOOPBACK flag, 2173 * but loop packets back. We do not have to do DAD on such 2174 * interfaces. We should even omit it, because loop-backed 2175 * NS would confuse the DAD procedure. 2176 */ 2177 return (0); 2178 default: 2179 /* 2180 * Our DAD routine requires the interface up and running. 2181 * However, some interfaces can be up before the RUNNING 2182 * status. Additionaly, users may try to assign addresses 2183 * before the interface becomes up (or running). 2184 * We simply skip DAD in such a case as a work around. 2185 * XXX: we should rather mark "tentative" on such addresses, 2186 * and do DAD after the interface becomes ready. 2187 */ 2188 if (!((ifp->if_flags & IFF_UP) && 2189 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2190 return (0); 2191 2192 return (1); 2193 } 2194 } 2195 2196 /* 2197 * Calculate max IPv6 MTU through all the interfaces and store it 2198 * to in6_maxmtu. 2199 */ 2200 void 2201 in6_setmaxmtu(void) 2202 { 2203 unsigned long maxmtu = 0; 2204 struct ifnet *ifp; 2205 2206 IFNET_RLOCK_NOSLEEP(); 2207 for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 2208 ifp = TAILQ_NEXT(ifp, if_list)) { 2209 /* this function can be called during ifnet initialization */ 2210 if (!ifp->if_afdata[AF_INET6]) 2211 continue; 2212 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2213 IN6_LINKMTU(ifp) > maxmtu) 2214 maxmtu = IN6_LINKMTU(ifp); 2215 } 2216 IFNET_RUNLOCK_NOSLEEP(); 2217 if (maxmtu) /* update only when maxmtu is positive */ 2218 V_in6_maxmtu = maxmtu; 2219 } 2220 2221 /* 2222 * Provide the length of interface identifiers to be used for the link attached 2223 * to the given interface. The length should be defined in "IPv6 over 2224 * xxx-link" document. Note that address architecture might also define 2225 * the length for a particular set of address prefixes, regardless of the 2226 * link type. As clarified in rfc2462bis, those two definitions should be 2227 * consistent, and those really are as of August 2004. 2228 */ 2229 int 2230 in6_if2idlen(struct ifnet *ifp) 2231 { 2232 switch (ifp->if_type) { 2233 case IFT_ETHER: /* RFC2464 */ 2234 #ifdef IFT_PROPVIRTUAL 2235 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2236 #endif 2237 #ifdef IFT_L2VLAN 2238 case IFT_L2VLAN: /* ditto */ 2239 #endif 2240 #ifdef IFT_IEEE80211 2241 case IFT_IEEE80211: /* ditto */ 2242 #endif 2243 #ifdef IFT_MIP 2244 case IFT_MIP: /* ditto */ 2245 #endif 2246 return (64); 2247 case IFT_FDDI: /* RFC2467 */ 2248 return (64); 2249 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2250 return (64); 2251 case IFT_PPP: /* RFC2472 */ 2252 return (64); 2253 case IFT_ARCNET: /* RFC2497 */ 2254 return (64); 2255 case IFT_FRELAY: /* RFC2590 */ 2256 return (64); 2257 case IFT_IEEE1394: /* RFC3146 */ 2258 return (64); 2259 case IFT_GIF: 2260 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2261 case IFT_LOOP: 2262 return (64); /* XXX: is this really correct? */ 2263 default: 2264 /* 2265 * Unknown link type: 2266 * It might be controversial to use the today's common constant 2267 * of 64 for these cases unconditionally. For full compliance, 2268 * we should return an error in this case. On the other hand, 2269 * if we simply miss the standard for the link type or a new 2270 * standard is defined for a new link type, the IFID length 2271 * is very likely to be the common constant. As a compromise, 2272 * we always use the constant, but make an explicit notice 2273 * indicating the "unknown" case. 2274 */ 2275 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2276 return (64); 2277 } 2278 } 2279 2280 #include <sys/sysctl.h> 2281 2282 struct in6_llentry { 2283 struct llentry base; 2284 struct sockaddr_in6 l3_addr6; 2285 }; 2286 2287 static struct llentry * 2288 in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2289 { 2290 struct in6_llentry *lle; 2291 2292 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, 2293 M_DONTWAIT | M_ZERO); 2294 if (lle == NULL) /* NB: caller generates msg */ 2295 return NULL; 2296 2297 callout_init(&lle->base.ln_timer_ch, CALLOUT_MPSAFE); 2298 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2299 lle->base.lle_refcnt = 1; 2300 LLE_LOCK_INIT(&lle->base); 2301 return &lle->base; 2302 } 2303 2304 /* 2305 * Deletes an address from the address table. 2306 * This function is called by the timer functions 2307 * such as arptimer() and nd6_llinfo_timer(), and 2308 * the caller does the locking. 2309 */ 2310 static void 2311 in6_lltable_free(struct lltable *llt, struct llentry *lle) 2312 { 2313 LLE_WUNLOCK(lle); 2314 LLE_LOCK_DESTROY(lle); 2315 free(lle, M_LLTABLE); 2316 } 2317 2318 static void 2319 in6_lltable_prefix_free(struct lltable *llt, 2320 const struct sockaddr *prefix, 2321 const struct sockaddr *mask) 2322 { 2323 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2324 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2325 struct llentry *lle, *next; 2326 register int i; 2327 2328 for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 2329 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2330 if (IN6_ARE_MASKED_ADDR_EQUAL( 2331 &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr, 2332 &pfx->sin6_addr, 2333 &msk->sin6_addr)) { 2334 callout_drain(&lle->la_timer); 2335 LLE_WLOCK(lle); 2336 llentry_free(lle); 2337 } 2338 } 2339 } 2340 } 2341 2342 static int 2343 in6_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 2344 { 2345 struct rtentry *rt; 2346 char ip6buf[INET6_ADDRSTRLEN]; 2347 2348 KASSERT(l3addr->sa_family == AF_INET6, 2349 ("sin_family %d", l3addr->sa_family)); 2350 2351 /* XXX rtalloc1 should take a const param */ 2352 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 2353 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2354 struct ifaddr *ifa; 2355 /* 2356 * Create an ND6 cache for an IPv6 neighbor 2357 * that is not covered by our own prefix. 2358 */ 2359 /* XXX ifaof_ifpforaddr should take a const param */ 2360 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2361 if (ifa != NULL) { 2362 ifa_free(ifa); 2363 if (rt != NULL) 2364 RTFREE_LOCKED(rt); 2365 return 0; 2366 } 2367 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2368 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2369 if (rt != NULL) 2370 RTFREE_LOCKED(rt); 2371 return EINVAL; 2372 } 2373 RTFREE_LOCKED(rt); 2374 return 0; 2375 } 2376 2377 static struct llentry * 2378 in6_lltable_lookup(struct lltable *llt, u_int flags, 2379 const struct sockaddr *l3addr) 2380 { 2381 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2382 struct ifnet *ifp = llt->llt_ifp; 2383 struct llentry *lle; 2384 struct llentries *lleh; 2385 u_int hashkey; 2386 2387 IF_AFDATA_LOCK_ASSERT(ifp); 2388 KASSERT(l3addr->sa_family == AF_INET6, 2389 ("sin_family %d", l3addr->sa_family)); 2390 2391 hashkey = sin6->sin6_addr.s6_addr32[3]; 2392 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2393 LIST_FOREACH(lle, lleh, lle_next) { 2394 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2395 if (lle->la_flags & LLE_DELETED) 2396 continue; 2397 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2398 sizeof(struct in6_addr)) == 0) 2399 break; 2400 } 2401 2402 if (lle == NULL) { 2403 if (!(flags & LLE_CREATE)) 2404 return (NULL); 2405 /* 2406 * A route that covers the given address must have 2407 * been installed 1st because we are doing a resolution, 2408 * verify this. 2409 */ 2410 if (!(flags & LLE_IFADDR) && 2411 in6_lltable_rtcheck(ifp, l3addr) != 0) 2412 return NULL; 2413 2414 lle = in6_lltable_new(l3addr, flags); 2415 if (lle == NULL) { 2416 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2417 return NULL; 2418 } 2419 lle->la_flags = flags & ~LLE_CREATE; 2420 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2421 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2422 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2423 } 2424 2425 lle->lle_tbl = llt; 2426 lle->lle_head = lleh; 2427 LIST_INSERT_HEAD(lleh, lle, lle_next); 2428 } else if (flags & LLE_DELETE) { 2429 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2430 LLE_WLOCK(lle); 2431 lle->la_flags = LLE_DELETED; 2432 LLE_WUNLOCK(lle); 2433 #ifdef DIAGNOSTICS 2434 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2435 #endif 2436 } 2437 lle = (void *)-1; 2438 } 2439 if (LLE_IS_VALID(lle)) { 2440 if (flags & LLE_EXCLUSIVE) 2441 LLE_WLOCK(lle); 2442 else 2443 LLE_RLOCK(lle); 2444 } 2445 return (lle); 2446 } 2447 2448 static int 2449 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2450 { 2451 struct ifnet *ifp = llt->llt_ifp; 2452 struct llentry *lle; 2453 /* XXX stack use */ 2454 struct { 2455 struct rt_msghdr rtm; 2456 struct sockaddr_in6 sin6; 2457 /* 2458 * ndp.c assumes that sdl is word aligned 2459 */ 2460 #ifdef __LP64__ 2461 uint32_t pad; 2462 #endif 2463 struct sockaddr_dl sdl; 2464 } ndpc; 2465 int i, error; 2466 2467 if (ifp->if_flags & IFF_LOOPBACK) 2468 return 0; 2469 2470 LLTABLE_LOCK_ASSERT(); 2471 2472 error = 0; 2473 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2474 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2475 struct sockaddr_dl *sdl; 2476 2477 /* skip deleted or invalid entries */ 2478 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2479 continue; 2480 /* Skip if jailed and not a valid IP of the prison. */ 2481 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2482 continue; 2483 /* 2484 * produce a msg made of: 2485 * struct rt_msghdr; 2486 * struct sockaddr_in6 (IPv6) 2487 * struct sockaddr_dl; 2488 */ 2489 bzero(&ndpc, sizeof(ndpc)); 2490 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2491 ndpc.rtm.rtm_version = RTM_VERSION; 2492 ndpc.rtm.rtm_type = RTM_GET; 2493 ndpc.rtm.rtm_flags = RTF_UP; 2494 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2495 ndpc.sin6.sin6_family = AF_INET6; 2496 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2497 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2498 2499 /* publish */ 2500 if (lle->la_flags & LLE_PUB) 2501 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2502 2503 sdl = &ndpc.sdl; 2504 sdl->sdl_family = AF_LINK; 2505 sdl->sdl_len = sizeof(*sdl); 2506 sdl->sdl_alen = ifp->if_addrlen; 2507 sdl->sdl_index = ifp->if_index; 2508 sdl->sdl_type = ifp->if_type; 2509 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2510 ndpc.rtm.rtm_rmx.rmx_expire = 2511 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2512 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2513 if (lle->la_flags & LLE_STATIC) 2514 ndpc.rtm.rtm_flags |= RTF_STATIC; 2515 ndpc.rtm.rtm_index = ifp->if_index; 2516 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2517 if (error) 2518 break; 2519 } 2520 } 2521 return error; 2522 } 2523 2524 void * 2525 in6_domifattach(struct ifnet *ifp) 2526 { 2527 struct in6_ifextra *ext; 2528 2529 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2530 bzero(ext, sizeof(*ext)); 2531 2532 ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2533 M_IFADDR, M_WAITOK); 2534 bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2535 2536 ext->icmp6_ifstat = 2537 (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2538 M_IFADDR, M_WAITOK); 2539 bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2540 2541 ext->nd_ifinfo = nd6_ifattach(ifp); 2542 ext->scope6_id = scope6_ifattach(ifp); 2543 ext->lltable = lltable_init(ifp, AF_INET6); 2544 if (ext->lltable != NULL) { 2545 ext->lltable->llt_new = in6_lltable_new; 2546 ext->lltable->llt_free = in6_lltable_free; 2547 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2548 ext->lltable->llt_rtcheck = in6_lltable_rtcheck; 2549 ext->lltable->llt_lookup = in6_lltable_lookup; 2550 ext->lltable->llt_dump = in6_lltable_dump; 2551 } 2552 2553 ext->mld_ifinfo = mld_domifattach(ifp); 2554 2555 return ext; 2556 } 2557 2558 void 2559 in6_domifdetach(struct ifnet *ifp, void *aux) 2560 { 2561 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2562 2563 mld_domifdetach(ifp); 2564 scope6_ifdetach(ext->scope6_id); 2565 nd6_ifdetach(ext->nd_ifinfo); 2566 lltable_free(ext->lltable); 2567 free(ext->in6_ifstat, M_IFADDR); 2568 free(ext->icmp6_ifstat, M_IFADDR); 2569 free(ext, M_IFADDR); 2570 } 2571 2572 /* 2573 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2574 * v4 mapped addr or v4 compat addr 2575 */ 2576 void 2577 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2578 { 2579 2580 bzero(sin, sizeof(*sin)); 2581 sin->sin_len = sizeof(struct sockaddr_in); 2582 sin->sin_family = AF_INET; 2583 sin->sin_port = sin6->sin6_port; 2584 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2585 } 2586 2587 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2588 void 2589 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2590 { 2591 bzero(sin6, sizeof(*sin6)); 2592 sin6->sin6_len = sizeof(struct sockaddr_in6); 2593 sin6->sin6_family = AF_INET6; 2594 sin6->sin6_port = sin->sin_port; 2595 sin6->sin6_addr.s6_addr32[0] = 0; 2596 sin6->sin6_addr.s6_addr32[1] = 0; 2597 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2598 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2599 } 2600 2601 /* Convert sockaddr_in6 into sockaddr_in. */ 2602 void 2603 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2604 { 2605 struct sockaddr_in *sin_p; 2606 struct sockaddr_in6 sin6; 2607 2608 /* 2609 * Save original sockaddr_in6 addr and convert it 2610 * to sockaddr_in. 2611 */ 2612 sin6 = *(struct sockaddr_in6 *)nam; 2613 sin_p = (struct sockaddr_in *)nam; 2614 in6_sin6_2_sin(sin_p, &sin6); 2615 } 2616 2617 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2618 void 2619 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2620 { 2621 struct sockaddr_in *sin_p; 2622 struct sockaddr_in6 *sin6_p; 2623 2624 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 2625 M_WAITOK); 2626 sin_p = (struct sockaddr_in *)*nam; 2627 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2628 free(*nam, M_SONAME); 2629 *nam = (struct sockaddr *)sin6_p; 2630 }
Cache object: 18b10bb5cf052b98f254e16ad9281221
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