1 /*- 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 30 */ 31 32 /*- 33 * Copyright (c) 1982, 1986, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)in.c 8.2 (Berkeley) 11/15/93 61 */ 62 63 #include <sys/cdefs.h> 64 __FBSDID("$FreeBSD$"); 65 66 #include "opt_compat.h" 67 #include "opt_inet.h" 68 #include "opt_inet6.h" 69 70 #include <sys/param.h> 71 #include <sys/eventhandler.h> 72 #include <sys/errno.h> 73 #include <sys/jail.h> 74 #include <sys/malloc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/sockio.h> 78 #include <sys/systm.h> 79 #include <sys/priv.h> 80 #include <sys/proc.h> 81 #include <sys/time.h> 82 #include <sys/kernel.h> 83 #include <sys/syslog.h> 84 85 #include <net/if.h> 86 #include <net/if_var.h> 87 #include <net/if_types.h> 88 #include <net/route.h> 89 #include <net/if_dl.h> 90 #include <net/vnet.h> 91 92 #include <netinet/in.h> 93 #include <netinet/in_var.h> 94 #include <net/if_llatbl.h> 95 #include <netinet/if_ether.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet/ip_carp.h> 100 101 #include <netinet/ip6.h> 102 #include <netinet6/ip6_var.h> 103 #include <netinet6/nd6.h> 104 #include <netinet6/mld6_var.h> 105 #include <netinet6/ip6_mroute.h> 106 #include <netinet6/in6_ifattach.h> 107 #include <netinet6/scope6_var.h> 108 #include <netinet6/in6_pcb.h> 109 110 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 111 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 112 113 /* 114 * Definitions of some costant IP6 addresses. 115 */ 116 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 117 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 118 const struct in6_addr in6addr_nodelocal_allnodes = 119 IN6ADDR_NODELOCAL_ALLNODES_INIT; 120 const struct in6_addr in6addr_linklocal_allnodes = 121 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 122 const struct in6_addr in6addr_linklocal_allrouters = 123 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 124 const struct in6_addr in6addr_linklocal_allv2routers = 125 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 126 127 const struct in6_addr in6mask0 = IN6MASK0; 128 const struct in6_addr in6mask32 = IN6MASK32; 129 const struct in6_addr in6mask64 = IN6MASK64; 130 const struct in6_addr in6mask96 = IN6MASK96; 131 const struct in6_addr in6mask128 = IN6MASK128; 132 133 const struct sockaddr_in6 sa6_any = 134 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 135 136 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 137 struct in6_aliasreq *, int); 138 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 139 140 int (*faithprefix_p)(struct in6_addr *); 141 142 static int in6_validate_ifra(struct ifnet *, struct in6_aliasreq *, 143 struct in6_ifaddr *, int); 144 static struct in6_ifaddr *in6_alloc_ifa(struct ifnet *, 145 struct in6_aliasreq *, int flags); 146 static int in6_update_ifa_internal(struct ifnet *, struct in6_aliasreq *, 147 struct in6_ifaddr *, int, int); 148 static int in6_broadcast_ifa(struct ifnet *, struct in6_aliasreq *, 149 struct in6_ifaddr *, int); 150 151 #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 152 #define ia62ifa(ia6) (&((ia6)->ia_ifa)) 153 154 155 void 156 in6_newaddrmsg(struct in6_ifaddr *ia, int cmd) 157 { 158 struct sockaddr_dl gateway; 159 struct sockaddr_in6 mask, addr; 160 struct rtentry rt; 161 162 /* 163 * initialize for rtmsg generation 164 */ 165 bzero(&gateway, sizeof(gateway)); 166 gateway.sdl_len = sizeof(gateway); 167 gateway.sdl_family = AF_LINK; 168 169 bzero(&rt, sizeof(rt)); 170 rt.rt_gateway = (struct sockaddr *)&gateway; 171 memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 172 memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 173 rt_mask(&rt) = (struct sockaddr *)&mask; 174 rt_key(&rt) = (struct sockaddr *)&addr; 175 rt.rt_flags = RTF_HOST | RTF_STATIC; 176 if (cmd == RTM_ADD) 177 rt.rt_flags |= RTF_UP; 178 /* Announce arrival of local address to all FIBs. */ 179 rt_newaddrmsg(cmd, &ia->ia_ifa, 0, &rt); 180 } 181 182 int 183 in6_mask2len(struct in6_addr *mask, u_char *lim0) 184 { 185 int x = 0, y; 186 u_char *lim = lim0, *p; 187 188 /* ignore the scope_id part */ 189 if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 190 lim = (u_char *)mask + sizeof(*mask); 191 for (p = (u_char *)mask; p < lim; x++, p++) { 192 if (*p != 0xff) 193 break; 194 } 195 y = 0; 196 if (p < lim) { 197 for (y = 0; y < 8; y++) { 198 if ((*p & (0x80 >> y)) == 0) 199 break; 200 } 201 } 202 203 /* 204 * when the limit pointer is given, do a stricter check on the 205 * remaining bits. 206 */ 207 if (p < lim) { 208 if (y != 0 && (*p & (0x00ff >> y)) != 0) 209 return (-1); 210 for (p = p + 1; p < lim; p++) 211 if (*p != 0) 212 return (-1); 213 } 214 215 return x * 8 + y; 216 } 217 218 #ifdef COMPAT_FREEBSD32 219 struct in6_ndifreq32 { 220 char ifname[IFNAMSIZ]; 221 uint32_t ifindex; 222 }; 223 #define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 224 #endif 225 226 int 227 in6_control(struct socket *so, u_long cmd, caddr_t data, 228 struct ifnet *ifp, struct thread *td) 229 { 230 struct in6_ifreq *ifr = (struct in6_ifreq *)data; 231 struct in6_ifaddr *ia = NULL; 232 struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 233 struct sockaddr_in6 *sa6; 234 int carp_attached = 0; 235 int error; 236 u_long ocmd = cmd; 237 238 /* 239 * Compat to make pre-10.x ifconfig(8) operable. 240 */ 241 if (cmd == OSIOCAIFADDR_IN6) 242 cmd = SIOCAIFADDR_IN6; 243 244 switch (cmd) { 245 case SIOCGETSGCNT_IN6: 246 case SIOCGETMIFCNT_IN6: 247 /* 248 * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 249 * We cannot see how that would be needed, so do not adjust the 250 * KPI blindly; more likely should clean up the IPv4 variant. 251 */ 252 return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 253 } 254 255 switch(cmd) { 256 case SIOCAADDRCTL_POLICY: 257 case SIOCDADDRCTL_POLICY: 258 if (td != NULL) { 259 error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 260 if (error) 261 return (error); 262 } 263 return (in6_src_ioctl(cmd, data)); 264 } 265 266 if (ifp == NULL) 267 return (EOPNOTSUPP); 268 269 switch (cmd) { 270 case SIOCSNDFLUSH_IN6: 271 case SIOCSPFXFLUSH_IN6: 272 case SIOCSRTRFLUSH_IN6: 273 case SIOCSDEFIFACE_IN6: 274 case SIOCSIFINFO_FLAGS: 275 case SIOCSIFINFO_IN6: 276 if (td != NULL) { 277 error = priv_check(td, PRIV_NETINET_ND6); 278 if (error) 279 return (error); 280 } 281 /* FALLTHROUGH */ 282 case OSIOCGIFINFO_IN6: 283 case SIOCGIFINFO_IN6: 284 case SIOCGDRLST_IN6: 285 case SIOCGPRLST_IN6: 286 case SIOCGNBRINFO_IN6: 287 case SIOCGDEFIFACE_IN6: 288 return (nd6_ioctl(cmd, data, ifp)); 289 290 #ifdef COMPAT_FREEBSD32 291 case SIOCGDEFIFACE32_IN6: 292 { 293 struct in6_ndifreq ndif; 294 struct in6_ndifreq32 *ndif32; 295 296 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 297 ifp); 298 if (error) 299 return (error); 300 ndif32 = (struct in6_ndifreq32 *)data; 301 ndif32->ifindex = ndif.ifindex; 302 return (0); 303 } 304 #endif 305 } 306 307 switch (cmd) { 308 case SIOCSIFPREFIX_IN6: 309 case SIOCDIFPREFIX_IN6: 310 case SIOCAIFPREFIX_IN6: 311 case SIOCCIFPREFIX_IN6: 312 case SIOCSGIFPREFIX_IN6: 313 case SIOCGIFPREFIX_IN6: 314 log(LOG_NOTICE, 315 "prefix ioctls are now invalidated. " 316 "please use ifconfig.\n"); 317 return (EOPNOTSUPP); 318 } 319 320 switch (cmd) { 321 case SIOCSSCOPE6: 322 if (td != NULL) { 323 error = priv_check(td, PRIV_NETINET_SCOPE6); 324 if (error) 325 return (error); 326 } 327 return (scope6_set(ifp, 328 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 329 case SIOCGSCOPE6: 330 return (scope6_get(ifp, 331 (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 332 case SIOCGSCOPE6DEF: 333 return (scope6_get_default((struct scope6_id *) 334 ifr->ifr_ifru.ifru_scope_id)); 335 } 336 337 /* 338 * Find address for this interface, if it exists. 339 * 340 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 341 * only, and used the first interface address as the target of other 342 * operations (without checking ifra_addr). This was because netinet 343 * code/API assumed at most 1 interface address per interface. 344 * Since IPv6 allows a node to assign multiple addresses 345 * on a single interface, we almost always look and check the 346 * presence of ifra_addr, and reject invalid ones here. 347 * It also decreases duplicated code among SIOC*_IN6 operations. 348 */ 349 switch (cmd) { 350 case SIOCAIFADDR_IN6: 351 case SIOCSIFPHYADDR_IN6: 352 sa6 = &ifra->ifra_addr; 353 break; 354 case SIOCSIFADDR_IN6: 355 case SIOCGIFADDR_IN6: 356 case SIOCSIFDSTADDR_IN6: 357 case SIOCSIFNETMASK_IN6: 358 case SIOCGIFDSTADDR_IN6: 359 case SIOCGIFNETMASK_IN6: 360 case SIOCDIFADDR_IN6: 361 case SIOCGIFPSRCADDR_IN6: 362 case SIOCGIFPDSTADDR_IN6: 363 case SIOCGIFAFLAG_IN6: 364 case SIOCSNDFLUSH_IN6: 365 case SIOCSPFXFLUSH_IN6: 366 case SIOCSRTRFLUSH_IN6: 367 case SIOCGIFALIFETIME_IN6: 368 case SIOCSIFALIFETIME_IN6: 369 case SIOCGIFSTAT_IN6: 370 case SIOCGIFSTAT_ICMP6: 371 sa6 = &ifr->ifr_addr; 372 break; 373 case SIOCSIFADDR: 374 case SIOCSIFBRDADDR: 375 case SIOCSIFDSTADDR: 376 case SIOCSIFNETMASK: 377 /* 378 * Although we should pass any non-INET6 ioctl requests 379 * down to driver, we filter some legacy INET requests. 380 * Drivers trust SIOCSIFADDR et al to come from an already 381 * privileged layer, and do not perform any credentials 382 * checks or input validation. 383 */ 384 return (EINVAL); 385 default: 386 sa6 = NULL; 387 break; 388 } 389 if (sa6 && sa6->sin6_family == AF_INET6) { 390 if (sa6->sin6_scope_id != 0) 391 error = sa6_embedscope(sa6, 0); 392 else 393 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 394 if (error != 0) 395 return (error); 396 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 397 &sa6->sin6_addr)) != 0) 398 return (error); 399 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 400 } else 401 ia = NULL; 402 403 switch (cmd) { 404 case SIOCSIFADDR_IN6: 405 case SIOCSIFDSTADDR_IN6: 406 case SIOCSIFNETMASK_IN6: 407 /* 408 * Since IPv6 allows a node to assign multiple addresses 409 * on a single interface, SIOCSIFxxx ioctls are deprecated. 410 */ 411 /* we decided to obsolete this command (20000704) */ 412 error = EINVAL; 413 goto out; 414 415 case SIOCDIFADDR_IN6: 416 /* 417 * for IPv4, we look for existing in_ifaddr here to allow 418 * "ifconfig if0 delete" to remove the first IPv4 address on 419 * the interface. For IPv6, as the spec allows multiple 420 * interface address from the day one, we consider "remove the 421 * first one" semantics to be not preferable. 422 */ 423 if (ia == NULL) { 424 error = EADDRNOTAVAIL; 425 goto out; 426 } 427 /* FALLTHROUGH */ 428 case SIOCAIFADDR_IN6: 429 /* 430 * We always require users to specify a valid IPv6 address for 431 * the corresponding operation. 432 */ 433 if (ifra->ifra_addr.sin6_family != AF_INET6 || 434 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 435 error = EAFNOSUPPORT; 436 goto out; 437 } 438 439 if (td != NULL) { 440 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 441 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 442 if (error) 443 goto out; 444 } 445 break; 446 447 case SIOCGIFADDR_IN6: 448 /* This interface is basically deprecated. use SIOCGIFCONF. */ 449 /* FALLTHROUGH */ 450 case SIOCGIFAFLAG_IN6: 451 case SIOCGIFNETMASK_IN6: 452 case SIOCGIFDSTADDR_IN6: 453 case SIOCGIFALIFETIME_IN6: 454 /* must think again about its semantics */ 455 if (ia == NULL) { 456 error = EADDRNOTAVAIL; 457 goto out; 458 } 459 break; 460 461 case SIOCSIFALIFETIME_IN6: 462 { 463 struct in6_addrlifetime *lt; 464 465 if (td != NULL) { 466 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 467 if (error) 468 goto out; 469 } 470 if (ia == NULL) { 471 error = EADDRNOTAVAIL; 472 goto out; 473 } 474 /* sanity for overflow - beware unsigned */ 475 lt = &ifr->ifr_ifru.ifru_lifetime; 476 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 477 lt->ia6t_vltime + time_uptime < time_uptime) { 478 error = EINVAL; 479 goto out; 480 } 481 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 482 lt->ia6t_pltime + time_uptime < time_uptime) { 483 error = EINVAL; 484 goto out; 485 } 486 break; 487 } 488 } 489 490 switch (cmd) { 491 case SIOCGIFADDR_IN6: 492 ifr->ifr_addr = ia->ia_addr; 493 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 494 goto out; 495 break; 496 497 case SIOCGIFDSTADDR_IN6: 498 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 499 error = EINVAL; 500 goto out; 501 } 502 /* 503 * XXX: should we check if ifa_dstaddr is NULL and return 504 * an error? 505 */ 506 ifr->ifr_dstaddr = ia->ia_dstaddr; 507 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 508 goto out; 509 break; 510 511 case SIOCGIFNETMASK_IN6: 512 ifr->ifr_addr = ia->ia_prefixmask; 513 break; 514 515 case SIOCGIFAFLAG_IN6: 516 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 517 break; 518 519 case SIOCGIFSTAT_IN6: 520 if (ifp == NULL) { 521 error = EINVAL; 522 goto out; 523 } 524 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 525 ifp->if_afdata[AF_INET6])->in6_ifstat, 526 &ifr->ifr_ifru.ifru_stat, 527 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 528 break; 529 530 case SIOCGIFSTAT_ICMP6: 531 if (ifp == NULL) { 532 error = EINVAL; 533 goto out; 534 } 535 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 536 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 537 &ifr->ifr_ifru.ifru_icmp6stat, 538 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 539 break; 540 541 case SIOCGIFALIFETIME_IN6: 542 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 543 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 544 time_t maxexpire; 545 struct in6_addrlifetime *retlt = 546 &ifr->ifr_ifru.ifru_lifetime; 547 548 /* 549 * XXX: adjust expiration time assuming time_t is 550 * signed. 551 */ 552 maxexpire = (-1) & 553 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 554 if (ia->ia6_lifetime.ia6t_vltime < 555 maxexpire - ia->ia6_updatetime) { 556 retlt->ia6t_expire = ia->ia6_updatetime + 557 ia->ia6_lifetime.ia6t_vltime; 558 } else 559 retlt->ia6t_expire = maxexpire; 560 } 561 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 562 time_t maxexpire; 563 struct in6_addrlifetime *retlt = 564 &ifr->ifr_ifru.ifru_lifetime; 565 566 /* 567 * XXX: adjust expiration time assuming time_t is 568 * signed. 569 */ 570 maxexpire = (-1) & 571 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 572 if (ia->ia6_lifetime.ia6t_pltime < 573 maxexpire - ia->ia6_updatetime) { 574 retlt->ia6t_preferred = ia->ia6_updatetime + 575 ia->ia6_lifetime.ia6t_pltime; 576 } else 577 retlt->ia6t_preferred = maxexpire; 578 } 579 break; 580 581 case SIOCSIFALIFETIME_IN6: 582 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 583 /* for sanity */ 584 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 585 ia->ia6_lifetime.ia6t_expire = 586 time_uptime + ia->ia6_lifetime.ia6t_vltime; 587 } else 588 ia->ia6_lifetime.ia6t_expire = 0; 589 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 590 ia->ia6_lifetime.ia6t_preferred = 591 time_uptime + ia->ia6_lifetime.ia6t_pltime; 592 } else 593 ia->ia6_lifetime.ia6t_preferred = 0; 594 break; 595 596 case SIOCAIFADDR_IN6: 597 { 598 struct nd_prefixctl pr0; 599 struct nd_prefix *pr; 600 601 /* 602 * first, make or update the interface address structure, 603 * and link it to the list. 604 */ 605 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 606 goto out; 607 if (ia != NULL) 608 ifa_free(&ia->ia_ifa); 609 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 610 == NULL) { 611 /* 612 * this can happen when the user specify the 0 valid 613 * lifetime. 614 */ 615 break; 616 } 617 618 if (cmd == ocmd && ifra->ifra_vhid > 0) { 619 if (carp_attach_p != NULL) 620 error = (*carp_attach_p)(&ia->ia_ifa, 621 ifra->ifra_vhid); 622 else 623 error = EPROTONOSUPPORT; 624 if (error) 625 goto out; 626 else 627 carp_attached = 1; 628 } 629 630 /* 631 * then, make the prefix on-link on the interface. 632 * XXX: we'd rather create the prefix before the address, but 633 * we need at least one address to install the corresponding 634 * interface route, so we configure the address first. 635 */ 636 637 /* 638 * convert mask to prefix length (prefixmask has already 639 * been validated in in6_update_ifa(). 640 */ 641 bzero(&pr0, sizeof(pr0)); 642 pr0.ndpr_ifp = ifp; 643 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 644 NULL); 645 if (pr0.ndpr_plen == 128) { 646 break; /* we don't need to install a host route. */ 647 } 648 pr0.ndpr_prefix = ifra->ifra_addr; 649 /* apply the mask for safety. */ 650 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 651 &ifra->ifra_prefixmask.sin6_addr); 652 653 /* 654 * XXX: since we don't have an API to set prefix (not address) 655 * lifetimes, we just use the same lifetimes as addresses. 656 * The (temporarily) installed lifetimes can be overridden by 657 * later advertised RAs (when accept_rtadv is non 0), which is 658 * an intended behavior. 659 */ 660 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 661 pr0.ndpr_raf_auto = 662 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 663 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 664 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 665 666 /* add the prefix if not yet. */ 667 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 668 /* 669 * nd6_prelist_add will install the corresponding 670 * interface route. 671 */ 672 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 673 if (carp_attached) 674 (*carp_detach_p)(&ia->ia_ifa); 675 goto out; 676 } 677 if (pr == NULL) { 678 if (carp_attached) 679 (*carp_detach_p)(&ia->ia_ifa); 680 log(LOG_ERR, "nd6_prelist_add succeeded but " 681 "no prefix\n"); 682 error = EINVAL; 683 goto out; 684 } 685 } 686 687 /* relate the address to the prefix */ 688 if (ia->ia6_ndpr == NULL) { 689 ia->ia6_ndpr = pr; 690 pr->ndpr_refcnt++; 691 692 /* 693 * If this is the first autoconf address from the 694 * prefix, create a temporary address as well 695 * (when required). 696 */ 697 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 698 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 699 int e; 700 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 701 log(LOG_NOTICE, "in6_control: failed " 702 "to create a temporary address, " 703 "errno=%d\n", e); 704 } 705 } 706 } 707 708 /* 709 * this might affect the status of autoconfigured addresses, 710 * that is, this address might make other addresses detached. 711 */ 712 pfxlist_onlink_check(); 713 if (error == 0 && ia) { 714 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 715 /* 716 * Try to clear the flag when a new 717 * IPv6 address is added onto an 718 * IFDISABLED interface and it 719 * succeeds. 720 */ 721 struct in6_ndireq nd; 722 723 memset(&nd, 0, sizeof(nd)); 724 nd.ndi.flags = ND_IFINFO(ifp)->flags; 725 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 726 if (nd6_ioctl(SIOCSIFINFO_FLAGS, 727 (caddr_t)&nd, ifp) < 0) 728 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 729 "SIOCSIFINFO_FLAGS for -ifdisabled " 730 "failed."); 731 /* 732 * Ignore failure of clearing the flag 733 * intentionally. The failure means 734 * address duplication was detected. 735 */ 736 } 737 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 738 } 739 break; 740 } 741 742 case SIOCDIFADDR_IN6: 743 { 744 struct nd_prefix *pr; 745 746 /* 747 * If the address being deleted is the only one that owns 748 * the corresponding prefix, expire the prefix as well. 749 * XXX: theoretically, we don't have to worry about such 750 * relationship, since we separate the address management 751 * and the prefix management. We do this, however, to provide 752 * as much backward compatibility as possible in terms of 753 * the ioctl operation. 754 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 755 */ 756 pr = ia->ia6_ndpr; 757 in6_purgeaddr(&ia->ia_ifa); 758 if (pr && pr->ndpr_refcnt == 0) 759 prelist_remove(pr); 760 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 761 break; 762 } 763 764 default: 765 if (ifp == NULL || ifp->if_ioctl == 0) { 766 error = EOPNOTSUPP; 767 goto out; 768 } 769 error = (*ifp->if_ioctl)(ifp, cmd, data); 770 goto out; 771 } 772 773 error = 0; 774 out: 775 if (ia != NULL) 776 ifa_free(&ia->ia_ifa); 777 return (error); 778 } 779 780 781 /* 782 * Join necessary multicast groups. Factored out from in6_update_ifa(). 783 * This entire work should only be done once, for the default FIB. 784 */ 785 static int 786 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 787 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 788 { 789 char ip6buf[INET6_ADDRSTRLEN]; 790 struct sockaddr_in6 mltaddr, mltmask; 791 struct in6_addr llsol; 792 struct in6_multi_mship *imm; 793 struct rtentry *rt; 794 int delay, error; 795 796 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 797 798 /* Join solicited multicast addr for new host id. */ 799 bzero(&llsol, sizeof(struct in6_addr)); 800 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 801 llsol.s6_addr32[1] = 0; 802 llsol.s6_addr32[2] = htonl(1); 803 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 804 llsol.s6_addr8[12] = 0xff; 805 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 806 /* XXX: should not happen */ 807 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 808 goto cleanup; 809 } 810 delay = 0; 811 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 812 /* 813 * We need a random delay for DAD on the address being 814 * configured. It also means delaying transmission of the 815 * corresponding MLD report to avoid report collision. 816 * [RFC 4861, Section 6.3.7] 817 */ 818 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 819 } 820 imm = in6_joingroup(ifp, &llsol, &error, delay); 821 if (imm == NULL) { 822 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 823 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol), 824 if_name(ifp), error)); 825 goto cleanup; 826 } 827 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 828 *in6m_sol = imm->i6mm_maddr; 829 830 bzero(&mltmask, sizeof(mltmask)); 831 mltmask.sin6_len = sizeof(struct sockaddr_in6); 832 mltmask.sin6_family = AF_INET6; 833 mltmask.sin6_addr = in6mask32; 834 #define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 835 836 /* 837 * Join link-local all-nodes address. 838 */ 839 bzero(&mltaddr, sizeof(mltaddr)); 840 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 841 mltaddr.sin6_family = AF_INET6; 842 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 843 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 844 goto cleanup; /* XXX: should not fail */ 845 846 /* 847 * XXX: do we really need this automatic routes? We should probably 848 * reconsider this stuff. Most applications actually do not need the 849 * routes, since they usually specify the outgoing interface. 850 */ 851 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 852 if (rt != NULL) { 853 /* XXX: only works in !SCOPEDROUTING case. */ 854 if (memcmp(&mltaddr.sin6_addr, 855 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 856 MLTMASK_LEN)) { 857 RTFREE_LOCKED(rt); 858 rt = NULL; 859 } 860 } 861 if (rt == NULL) { 862 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 863 (struct sockaddr *)&ia->ia_addr, 864 (struct sockaddr *)&mltmask, RTF_UP, 865 (struct rtentry **)0, RT_DEFAULT_FIB); 866 if (error) 867 goto cleanup; 868 } else 869 RTFREE_LOCKED(rt); 870 871 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 872 if (imm == NULL) { 873 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 874 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 875 &mltaddr.sin6_addr), if_name(ifp), error)); 876 goto cleanup; 877 } 878 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 879 880 /* 881 * Join node information group address. 882 */ 883 delay = 0; 884 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 885 /* 886 * The spec does not say anything about delay for this group, 887 * but the same logic should apply. 888 */ 889 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 890 } 891 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 892 /* XXX jinmei */ 893 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 894 if (imm == NULL) 895 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 896 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 897 &mltaddr.sin6_addr), if_name(ifp), error)); 898 /* XXX not very fatal, go on... */ 899 else 900 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 901 } 902 if (V_icmp6_nodeinfo_oldmcprefix && 903 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 904 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 905 if (imm == NULL) 906 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 907 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 908 &mltaddr.sin6_addr), if_name(ifp), error)); 909 /* XXX not very fatal, go on... */ 910 else 911 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 912 } 913 914 /* 915 * Join interface-local all-nodes address. 916 * (ff01::1%ifN, and ff01::%ifN/32) 917 */ 918 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 919 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 920 goto cleanup; /* XXX: should not fail */ 921 /* XXX: again, do we really need the route? */ 922 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 923 if (rt != NULL) { 924 if (memcmp(&mltaddr.sin6_addr, 925 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 926 MLTMASK_LEN)) { 927 RTFREE_LOCKED(rt); 928 rt = NULL; 929 } 930 } 931 if (rt == NULL) { 932 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 933 (struct sockaddr *)&ia->ia_addr, 934 (struct sockaddr *)&mltmask, RTF_UP, 935 (struct rtentry **)0, RT_DEFAULT_FIB); 936 if (error) 937 goto cleanup; 938 } else 939 RTFREE_LOCKED(rt); 940 941 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 942 if (imm == NULL) { 943 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 944 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 945 &mltaddr.sin6_addr), if_name(ifp), error)); 946 goto cleanup; 947 } 948 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 949 #undef MLTMASK_LEN 950 951 cleanup: 952 return (error); 953 } 954 955 /* 956 * Update parameters of an IPv6 interface address. 957 * If necessary, a new entry is created and linked into address chains. 958 * This function is separated from in6_control(). 959 */ 960 int 961 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 962 struct in6_ifaddr *ia, int flags) 963 { 964 int error, hostIsNew = 0; 965 966 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 967 return (error); 968 969 if (ia == NULL) { 970 hostIsNew = 1; 971 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 972 return (ENOBUFS); 973 } 974 975 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 976 if (error != 0) { 977 if (hostIsNew != 0) { 978 in6_unlink_ifa(ia, ifp); 979 ifa_free(&ia->ia_ifa); 980 } 981 return (error); 982 } 983 984 if (hostIsNew) 985 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 986 987 return (error); 988 } 989 990 /* 991 * Fill in basic IPv6 address request info. 992 */ 993 void 994 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 995 const struct in6_addr *mask) 996 { 997 998 memset(ifra, 0, sizeof(struct in6_aliasreq)); 999 1000 ifra->ifra_addr.sin6_family = AF_INET6; 1001 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 1002 if (addr != NULL) 1003 ifra->ifra_addr.sin6_addr = *addr; 1004 1005 ifra->ifra_prefixmask.sin6_family = AF_INET6; 1006 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1007 if (mask != NULL) 1008 ifra->ifra_prefixmask.sin6_addr = *mask; 1009 } 1010 1011 static int 1012 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 1013 struct in6_ifaddr *ia, int flags) 1014 { 1015 int plen = -1; 1016 struct sockaddr_in6 dst6; 1017 struct in6_addrlifetime *lt; 1018 char ip6buf[INET6_ADDRSTRLEN]; 1019 1020 /* Validate parameters */ 1021 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 1022 return (EINVAL); 1023 1024 /* 1025 * The destination address for a p2p link must have a family 1026 * of AF_UNSPEC or AF_INET6. 1027 */ 1028 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 1029 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 1030 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 1031 return (EAFNOSUPPORT); 1032 1033 /* 1034 * Validate address 1035 */ 1036 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 1037 ifra->ifra_addr.sin6_family != AF_INET6) 1038 return (EINVAL); 1039 1040 /* 1041 * validate ifra_prefixmask. don't check sin6_family, netmask 1042 * does not carry fields other than sin6_len. 1043 */ 1044 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 1045 return (EINVAL); 1046 /* 1047 * Because the IPv6 address architecture is classless, we require 1048 * users to specify a (non 0) prefix length (mask) for a new address. 1049 * We also require the prefix (when specified) mask is valid, and thus 1050 * reject a non-consecutive mask. 1051 */ 1052 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 1053 return (EINVAL); 1054 if (ifra->ifra_prefixmask.sin6_len != 0) { 1055 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 1056 (u_char *)&ifra->ifra_prefixmask + 1057 ifra->ifra_prefixmask.sin6_len); 1058 if (plen <= 0) 1059 return (EINVAL); 1060 } else { 1061 /* 1062 * In this case, ia must not be NULL. We just use its prefix 1063 * length. 1064 */ 1065 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1066 } 1067 /* 1068 * If the destination address on a p2p interface is specified, 1069 * and the address is a scoped one, validate/set the scope 1070 * zone identifier. 1071 */ 1072 dst6 = ifra->ifra_dstaddr; 1073 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1074 (dst6.sin6_family == AF_INET6)) { 1075 struct in6_addr in6_tmp; 1076 u_int32_t zoneid; 1077 1078 in6_tmp = dst6.sin6_addr; 1079 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1080 return (EINVAL); /* XXX: should be impossible */ 1081 1082 if (dst6.sin6_scope_id != 0) { 1083 if (dst6.sin6_scope_id != zoneid) 1084 return (EINVAL); 1085 } else /* user omit to specify the ID. */ 1086 dst6.sin6_scope_id = zoneid; 1087 1088 /* convert into the internal form */ 1089 if (sa6_embedscope(&dst6, 0)) 1090 return (EINVAL); /* XXX: should be impossible */ 1091 } 1092 /* Modify original ifra_dstaddr to reflect changes */ 1093 ifra->ifra_dstaddr = dst6; 1094 1095 /* 1096 * The destination address can be specified only for a p2p or a 1097 * loopback interface. If specified, the corresponding prefix length 1098 * must be 128. 1099 */ 1100 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1101 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1102 /* XXX: noisy message */ 1103 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1104 "be specified for a p2p or a loopback IF only\n")); 1105 return (EINVAL); 1106 } 1107 if (plen != 128) { 1108 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1109 "be 128 when dstaddr is specified\n")); 1110 return (EINVAL); 1111 } 1112 } 1113 /* lifetime consistency check */ 1114 lt = &ifra->ifra_lifetime; 1115 if (lt->ia6t_pltime > lt->ia6t_vltime) 1116 return (EINVAL); 1117 if (lt->ia6t_vltime == 0) { 1118 /* 1119 * the following log might be noisy, but this is a typical 1120 * configuration mistake or a tool's bug. 1121 */ 1122 nd6log((LOG_INFO, 1123 "in6_update_ifa: valid lifetime is 0 for %s\n", 1124 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1125 1126 if (ia == NULL) 1127 return (0); /* there's nothing to do */ 1128 } 1129 1130 /* Check prefix mask */ 1131 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1132 /* 1133 * We prohibit changing the prefix length of an existing 1134 * address, because 1135 * + such an operation should be rare in IPv6, and 1136 * + the operation would confuse prefix management. 1137 */ 1138 if (ia->ia_prefixmask.sin6_len != 0 && 1139 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1140 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1141 "of an existing %s address should not be changed\n", 1142 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1143 1144 return (EINVAL); 1145 } 1146 } 1147 1148 return (0); 1149 } 1150 1151 1152 /* 1153 * Allocate a new ifaddr and link it into chains. 1154 */ 1155 static struct in6_ifaddr * 1156 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1157 { 1158 struct in6_ifaddr *ia; 1159 1160 /* 1161 * When in6_alloc_ifa() is called in a process of a received 1162 * RA, it is called under an interrupt context. So, we should 1163 * call malloc with M_NOWAIT. 1164 */ 1165 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1166 if (ia == NULL) 1167 return (NULL); 1168 LIST_INIT(&ia->ia6_memberships); 1169 /* Initialize the address and masks, and put time stamp */ 1170 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1171 ia->ia_addr.sin6_family = AF_INET6; 1172 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1173 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1174 ia->ia_addr = ifra->ifra_addr; 1175 ia->ia6_createtime = time_uptime; 1176 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1177 /* 1178 * Some functions expect that ifa_dstaddr is not 1179 * NULL for p2p interfaces. 1180 */ 1181 ia->ia_ifa.ifa_dstaddr = 1182 (struct sockaddr *)&ia->ia_dstaddr; 1183 } else { 1184 ia->ia_ifa.ifa_dstaddr = NULL; 1185 } 1186 1187 /* set prefix mask if any */ 1188 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1189 if (ifra->ifra_prefixmask.sin6_len != 0) { 1190 ia->ia_prefixmask.sin6_family = AF_INET6; 1191 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1192 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1193 } 1194 1195 ia->ia_ifp = ifp; 1196 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1197 IF_ADDR_WLOCK(ifp); 1198 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1199 IF_ADDR_WUNLOCK(ifp); 1200 1201 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1202 IN6_IFADDR_WLOCK(); 1203 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1204 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1205 IN6_IFADDR_WUNLOCK(); 1206 1207 return (ia); 1208 } 1209 1210 /* 1211 * Update/configure interface address parameters: 1212 * 1213 * 1) Update lifetime 1214 * 2) Update interface metric ad flags 1215 * 3) Notify other subsystems 1216 */ 1217 static int 1218 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1219 struct in6_ifaddr *ia, int hostIsNew, int flags) 1220 { 1221 int error; 1222 1223 /* update timestamp */ 1224 ia->ia6_updatetime = time_uptime; 1225 1226 /* 1227 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1228 * to see if the address is deprecated or invalidated, but initialize 1229 * these members for applications. 1230 */ 1231 ia->ia6_lifetime = ifra->ifra_lifetime; 1232 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1233 ia->ia6_lifetime.ia6t_expire = 1234 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1235 } else 1236 ia->ia6_lifetime.ia6t_expire = 0; 1237 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1238 ia->ia6_lifetime.ia6t_preferred = 1239 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1240 } else 1241 ia->ia6_lifetime.ia6t_preferred = 0; 1242 1243 /* 1244 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1245 * userland, make it deprecated. 1246 */ 1247 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1248 ia->ia6_lifetime.ia6t_pltime = 0; 1249 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1250 } 1251 1252 /* 1253 * configure address flags. 1254 */ 1255 ia->ia6_flags = ifra->ifra_flags; 1256 1257 /* 1258 * Make the address tentative before joining multicast addresses, 1259 * so that corresponding MLD responses would not have a tentative 1260 * source address. 1261 */ 1262 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1263 if (hostIsNew && in6if_do_dad(ifp)) 1264 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1265 1266 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 1267 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1268 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1269 1270 /* notify other subsystems */ 1271 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1272 1273 return (error); 1274 } 1275 1276 /* 1277 * Do link-level ifa job: 1278 * 1) Add lle entry for added address 1279 * 2) Notifies routing socket users about new address 1280 * 3) join appropriate multicast group 1281 * 4) start DAD if enabled 1282 */ 1283 static int 1284 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1285 struct in6_ifaddr *ia, int flags) 1286 { 1287 struct in6_multi *in6m_sol; 1288 int error = 0; 1289 1290 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1291 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1292 in6_purgeaddr(&ia->ia_ifa); 1293 ifa_free(&ia->ia_ifa); 1294 return (error); 1295 } 1296 1297 /* Join necessary multicast groups. */ 1298 in6m_sol = NULL; 1299 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1300 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1301 if (error != 0) { 1302 in6_purgeaddr(&ia->ia_ifa); 1303 ifa_free(&ia->ia_ifa); 1304 return (error); 1305 } 1306 } 1307 1308 /* 1309 * Perform DAD, if needed. 1310 * XXX It may be of use, if we can administratively disable DAD. 1311 */ 1312 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1313 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1314 { 1315 int delay, mindelay, maxdelay; 1316 1317 delay = 0; 1318 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1319 /* 1320 * We need to impose a delay before sending an NS 1321 * for DAD. Check if we also needed a delay for the 1322 * corresponding MLD message. If we did, the delay 1323 * should be larger than the MLD delay (this could be 1324 * relaxed a bit, but this simple logic is at least 1325 * safe). 1326 * XXX: Break data hiding guidelines and look at 1327 * state for the solicited multicast group. 1328 */ 1329 mindelay = 0; 1330 if (in6m_sol != NULL && 1331 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1332 mindelay = in6m_sol->in6m_timer; 1333 } 1334 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1335 if (maxdelay - mindelay == 0) 1336 delay = 0; 1337 else { 1338 delay = 1339 (arc4random() % (maxdelay - mindelay)) + 1340 mindelay; 1341 } 1342 } 1343 nd6_dad_start((struct ifaddr *)ia, delay); 1344 } 1345 1346 ifa_free(&ia->ia_ifa); 1347 return (error); 1348 } 1349 1350 /* 1351 * Leave multicast groups. Factored out from in6_purgeaddr(). 1352 * This entire work should only be done once, for the default FIB. 1353 */ 1354 static int 1355 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0) 1356 { 1357 struct sockaddr_in6 mltaddr, mltmask; 1358 struct in6_multi_mship *imm; 1359 struct rtentry *rt; 1360 struct sockaddr_in6 sin6; 1361 int error; 1362 1363 /* 1364 * Leave from multicast groups we have joined for the interface. 1365 */ 1366 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1367 LIST_REMOVE(imm, i6mm_chain); 1368 in6_leavegroup(imm); 1369 } 1370 1371 /* 1372 * Remove the link-local all-nodes address. 1373 */ 1374 bzero(&mltmask, sizeof(mltmask)); 1375 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1376 mltmask.sin6_family = AF_INET6; 1377 mltmask.sin6_addr = in6mask32; 1378 1379 bzero(&mltaddr, sizeof(mltaddr)); 1380 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1381 mltaddr.sin6_family = AF_INET6; 1382 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1383 1384 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1385 return (error); 1386 1387 /* 1388 * As for the mltaddr above, proactively prepare the sin6 to avoid 1389 * rtentry un- and re-locking. 1390 */ 1391 if (ifa0 != NULL) { 1392 bzero(&sin6, sizeof(sin6)); 1393 sin6.sin6_len = sizeof(sin6); 1394 sin6.sin6_family = AF_INET6; 1395 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1396 sizeof(sin6.sin6_addr)); 1397 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL); 1398 if (error != 0) 1399 return (error); 1400 } 1401 1402 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1403 if (rt != NULL && rt->rt_gateway != NULL && 1404 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1405 &ia->ia_addr.sin6_addr, 1406 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1407 /* 1408 * If no more IPv6 address exists on this interface then 1409 * remove the multicast address route. 1410 */ 1411 if (ifa0 == NULL) { 1412 memcpy(&mltaddr.sin6_addr, 1413 &satosin6(rt_key(rt))->sin6_addr, 1414 sizeof(mltaddr.sin6_addr)); 1415 RTFREE_LOCKED(rt); 1416 error = in6_rtrequest(RTM_DELETE, 1417 (struct sockaddr *)&mltaddr, 1418 (struct sockaddr *)&ia->ia_addr, 1419 (struct sockaddr *)&mltmask, RTF_UP, 1420 (struct rtentry **)0, RT_DEFAULT_FIB); 1421 if (error) 1422 log(LOG_INFO, "%s: link-local all-nodes " 1423 "multicast address deletion error\n", 1424 __func__); 1425 } else { 1426 /* 1427 * Replace the gateway of the route. 1428 */ 1429 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1430 RTFREE_LOCKED(rt); 1431 } 1432 } else { 1433 if (rt != NULL) 1434 RTFREE_LOCKED(rt); 1435 } 1436 1437 /* 1438 * Remove the node-local all-nodes address. 1439 */ 1440 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1441 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1442 return (error); 1443 1444 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1445 if (rt != NULL && rt->rt_gateway != NULL && 1446 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1447 &ia->ia_addr.sin6_addr, 1448 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1449 /* 1450 * If no more IPv6 address exists on this interface then 1451 * remove the multicast address route. 1452 */ 1453 if (ifa0 == NULL) { 1454 memcpy(&mltaddr.sin6_addr, 1455 &satosin6(rt_key(rt))->sin6_addr, 1456 sizeof(mltaddr.sin6_addr)); 1457 1458 RTFREE_LOCKED(rt); 1459 error = in6_rtrequest(RTM_DELETE, 1460 (struct sockaddr *)&mltaddr, 1461 (struct sockaddr *)&ia->ia_addr, 1462 (struct sockaddr *)&mltmask, RTF_UP, 1463 (struct rtentry **)0, RT_DEFAULT_FIB); 1464 if (error) 1465 log(LOG_INFO, "%s: node-local all-nodes" 1466 "multicast address deletion error\n", 1467 __func__); 1468 } else { 1469 /* 1470 * Replace the gateway of the route. 1471 */ 1472 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1473 RTFREE_LOCKED(rt); 1474 } 1475 } else { 1476 if (rt != NULL) 1477 RTFREE_LOCKED(rt); 1478 } 1479 1480 return (0); 1481 } 1482 1483 void 1484 in6_purgeaddr(struct ifaddr *ifa) 1485 { 1486 struct ifnet *ifp = ifa->ifa_ifp; 1487 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1488 int plen, error; 1489 struct ifaddr *ifa0; 1490 1491 if (ifa->ifa_carp) 1492 (*carp_detach_p)(ifa); 1493 1494 /* 1495 * find another IPv6 address as the gateway for the 1496 * link-local and node-local all-nodes multicast 1497 * address routes 1498 */ 1499 IF_ADDR_RLOCK(ifp); 1500 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) { 1501 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1502 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1503 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0) 1504 continue; 1505 else 1506 break; 1507 } 1508 if (ifa0 != NULL) 1509 ifa_ref(ifa0); 1510 IF_ADDR_RUNLOCK(ifp); 1511 1512 /* 1513 * Remove the loopback route to the interface address. 1514 * The check for the current setting of "nd6_useloopback" 1515 * is not needed. 1516 */ 1517 if (ia->ia_flags & IFA_RTSELF) { 1518 error = ifa_del_loopback_route((struct ifaddr *)ia, 1519 (struct sockaddr *)&ia->ia_addr); 1520 if (error == 0) 1521 ia->ia_flags &= ~IFA_RTSELF; 1522 } 1523 1524 /* stop DAD processing */ 1525 nd6_dad_stop(ifa); 1526 1527 /* Remove local address entry from lltable. */ 1528 nd6_rem_ifa_lle(ia); 1529 1530 /* Leave multicast groups. */ 1531 error = in6_purgeaddr_mc(ifp, ia, ifa0); 1532 1533 if (ifa0 != NULL) 1534 ifa_free(ifa0); 1535 1536 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1537 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1538 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1539 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0); 1540 if (error != 0) 1541 log(LOG_INFO, "%s: err=%d, destination address delete " 1542 "failed\n", __func__, error); 1543 ia->ia_flags &= ~IFA_ROUTE; 1544 } 1545 1546 in6_unlink_ifa(ia, ifp); 1547 } 1548 1549 static void 1550 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1551 { 1552 1553 IF_ADDR_WLOCK(ifp); 1554 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1555 IF_ADDR_WUNLOCK(ifp); 1556 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1557 1558 /* 1559 * Defer the release of what might be the last reference to the 1560 * in6_ifaddr so that it can't be freed before the remainder of the 1561 * cleanup. 1562 */ 1563 IN6_IFADDR_WLOCK(); 1564 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1565 LIST_REMOVE(ia, ia6_hash); 1566 IN6_IFADDR_WUNLOCK(); 1567 1568 /* 1569 * Release the reference to the base prefix. There should be a 1570 * positive reference. 1571 */ 1572 if (ia->ia6_ndpr == NULL) { 1573 nd6log((LOG_NOTICE, 1574 "in6_unlink_ifa: autoconf'ed address " 1575 "%p has no prefix\n", ia)); 1576 } else { 1577 ia->ia6_ndpr->ndpr_refcnt--; 1578 ia->ia6_ndpr = NULL; 1579 } 1580 1581 /* 1582 * Also, if the address being removed is autoconf'ed, call 1583 * pfxlist_onlink_check() since the release might affect the status of 1584 * other (detached) addresses. 1585 */ 1586 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1587 pfxlist_onlink_check(); 1588 } 1589 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1590 } 1591 1592 void 1593 in6_purgeif(struct ifnet *ifp) 1594 { 1595 struct ifaddr *ifa, *nifa; 1596 1597 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1598 if (ifa->ifa_addr->sa_family != AF_INET6) 1599 continue; 1600 in6_purgeaddr(ifa); 1601 } 1602 1603 in6_ifdetach(ifp); 1604 } 1605 1606 /* 1607 * Notifies other other subsystems about address change/arrival: 1608 * 1) Notifies device handler on first IPv6 address assignment 1609 * 2) Handle routing table changes for P2P links and route 1610 * 3) Handle routing table changes for address host route 1611 */ 1612 static int 1613 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1614 struct in6_aliasreq *ifra, int hostIsNew) 1615 { 1616 int error = 0, plen, ifacount = 0; 1617 struct ifaddr *ifa; 1618 struct sockaddr_in6 *pdst; 1619 char ip6buf[INET6_ADDRSTRLEN]; 1620 1621 /* 1622 * Give the interface a chance to initialize 1623 * if this is its first address, 1624 */ 1625 if (hostIsNew != 0) { 1626 IF_ADDR_RLOCK(ifp); 1627 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1628 if (ifa->ifa_addr->sa_family != AF_INET6) 1629 continue; 1630 ifacount++; 1631 } 1632 IF_ADDR_RUNLOCK(ifp); 1633 } 1634 1635 if (ifacount <= 1 && ifp->if_ioctl) { 1636 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1637 if (error) 1638 return (error); 1639 } 1640 1641 /* 1642 * If a new destination address is specified, scrub the old one and 1643 * install the new destination. Note that the interface must be 1644 * p2p or loopback. 1645 */ 1646 pdst = &ifra->ifra_dstaddr; 1647 if (pdst->sin6_family == AF_INET6 && 1648 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1649 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1650 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1651 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1652 "remove a route to the old destination: %s\n", 1653 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1654 /* proceed anyway... */ 1655 } else 1656 ia->ia_flags &= ~IFA_ROUTE; 1657 ia->ia_dstaddr = *pdst; 1658 } 1659 1660 /* 1661 * If a new destination address is specified for a point-to-point 1662 * interface, install a route to the destination as an interface 1663 * direct route. 1664 * XXX: the logic below rejects assigning multiple addresses on a p2p 1665 * interface that share the same destination. 1666 */ 1667 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1668 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1669 ia->ia_dstaddr.sin6_family == AF_INET6) { 1670 int rtflags = RTF_UP | RTF_HOST; 1671 /* 1672 * Handle the case for ::1 . 1673 */ 1674 if (ifp->if_flags & IFF_LOOPBACK) 1675 ia->ia_flags |= IFA_RTSELF; 1676 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1677 if (error) 1678 return (error); 1679 ia->ia_flags |= IFA_ROUTE; 1680 } 1681 1682 /* 1683 * add a loopback route to self if not exists 1684 */ 1685 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1686 error = ifa_add_loopback_route((struct ifaddr *)ia, 1687 (struct sockaddr *)&ia->ia_addr); 1688 if (error == 0) 1689 ia->ia_flags |= IFA_RTSELF; 1690 } 1691 1692 return (error); 1693 } 1694 1695 /* 1696 * Find an IPv6 interface link-local address specific to an interface. 1697 * ifaddr is returned referenced. 1698 */ 1699 struct in6_ifaddr * 1700 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1701 { 1702 struct ifaddr *ifa; 1703 1704 IF_ADDR_RLOCK(ifp); 1705 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1706 if (ifa->ifa_addr->sa_family != AF_INET6) 1707 continue; 1708 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1709 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1710 ignoreflags) != 0) 1711 continue; 1712 ifa_ref(ifa); 1713 break; 1714 } 1715 } 1716 IF_ADDR_RUNLOCK(ifp); 1717 1718 return ((struct in6_ifaddr *)ifa); 1719 } 1720 1721 1722 /* 1723 * find the internet address corresponding to a given interface and address. 1724 * ifaddr is returned referenced. 1725 */ 1726 struct in6_ifaddr * 1727 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1728 { 1729 struct ifaddr *ifa; 1730 1731 IF_ADDR_RLOCK(ifp); 1732 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1733 if (ifa->ifa_addr->sa_family != AF_INET6) 1734 continue; 1735 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1736 ifa_ref(ifa); 1737 break; 1738 } 1739 } 1740 IF_ADDR_RUNLOCK(ifp); 1741 1742 return ((struct in6_ifaddr *)ifa); 1743 } 1744 1745 /* 1746 * Find a link-local scoped address on ifp and return it if any. 1747 */ 1748 struct in6_ifaddr * 1749 in6ifa_llaonifp(struct ifnet *ifp) 1750 { 1751 struct sockaddr_in6 *sin6; 1752 struct ifaddr *ifa; 1753 1754 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1755 return (NULL); 1756 if_addr_rlock(ifp); 1757 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1758 if (ifa->ifa_addr->sa_family != AF_INET6) 1759 continue; 1760 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1761 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1762 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1763 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1764 break; 1765 } 1766 if_addr_runlock(ifp); 1767 1768 return ((struct in6_ifaddr *)ifa); 1769 } 1770 1771 /* 1772 * Convert IP6 address to printable (loggable) representation. Caller 1773 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1774 */ 1775 static char digits[] = "0123456789abcdef"; 1776 char * 1777 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1778 { 1779 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1780 char *cp; 1781 const u_int16_t *a = (const u_int16_t *)addr; 1782 const u_int8_t *d; 1783 int dcolon = 0, zero = 0; 1784 1785 cp = ip6buf; 1786 1787 for (i = 0; i < 8; i++) { 1788 if (*(a + i) == 0) { 1789 cnt++; 1790 if (cnt == 1) 1791 idx = i; 1792 } 1793 else if (maxcnt < cnt) { 1794 maxcnt = cnt; 1795 index = idx; 1796 cnt = 0; 1797 } 1798 } 1799 if (maxcnt < cnt) { 1800 maxcnt = cnt; 1801 index = idx; 1802 } 1803 1804 for (i = 0; i < 8; i++) { 1805 if (dcolon == 1) { 1806 if (*a == 0) { 1807 if (i == 7) 1808 *cp++ = ':'; 1809 a++; 1810 continue; 1811 } else 1812 dcolon = 2; 1813 } 1814 if (*a == 0) { 1815 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1816 if (i == 0) 1817 *cp++ = ':'; 1818 *cp++ = ':'; 1819 dcolon = 1; 1820 } else { 1821 *cp++ = '0'; 1822 *cp++ = ':'; 1823 } 1824 a++; 1825 continue; 1826 } 1827 d = (const u_char *)a; 1828 /* Try to eliminate leading zeros in printout like in :0001. */ 1829 zero = 1; 1830 *cp = digits[*d >> 4]; 1831 if (*cp != '0') { 1832 zero = 0; 1833 cp++; 1834 } 1835 *cp = digits[*d++ & 0xf]; 1836 if (zero == 0 || (*cp != '0')) { 1837 zero = 0; 1838 cp++; 1839 } 1840 *cp = digits[*d >> 4]; 1841 if (zero == 0 || (*cp != '0')) { 1842 zero = 0; 1843 cp++; 1844 } 1845 *cp++ = digits[*d & 0xf]; 1846 *cp++ = ':'; 1847 a++; 1848 } 1849 *--cp = '\0'; 1850 return (ip6buf); 1851 } 1852 1853 int 1854 in6_localaddr(struct in6_addr *in6) 1855 { 1856 struct in6_ifaddr *ia; 1857 1858 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1859 return 1; 1860 1861 IN6_IFADDR_RLOCK(); 1862 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1863 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1864 &ia->ia_prefixmask.sin6_addr)) { 1865 IN6_IFADDR_RUNLOCK(); 1866 return 1; 1867 } 1868 } 1869 IN6_IFADDR_RUNLOCK(); 1870 1871 return (0); 1872 } 1873 1874 /* 1875 * Return 1 if an internet address is for the local host and configured 1876 * on one of its interfaces. 1877 */ 1878 int 1879 in6_localip(struct in6_addr *in6) 1880 { 1881 struct in6_ifaddr *ia; 1882 1883 IN6_IFADDR_RLOCK(); 1884 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1885 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1886 IN6_IFADDR_RUNLOCK(); 1887 return (1); 1888 } 1889 } 1890 IN6_IFADDR_RUNLOCK(); 1891 return (0); 1892 } 1893 1894 int 1895 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1896 { 1897 struct in6_ifaddr *ia; 1898 1899 IN6_IFADDR_RLOCK(); 1900 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1901 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1902 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1903 IN6_IFADDR_RUNLOCK(); 1904 return (1); /* true */ 1905 } 1906 break; 1907 } 1908 } 1909 IN6_IFADDR_RUNLOCK(); 1910 1911 return (0); /* false */ 1912 } 1913 1914 /* 1915 * return length of part which dst and src are equal 1916 * hard coding... 1917 */ 1918 int 1919 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1920 { 1921 int match = 0; 1922 u_char *s = (u_char *)src, *d = (u_char *)dst; 1923 u_char *lim = s + 16, r; 1924 1925 while (s < lim) 1926 if ((r = (*d++ ^ *s++)) != 0) { 1927 while (r < 128) { 1928 match++; 1929 r <<= 1; 1930 } 1931 break; 1932 } else 1933 match += 8; 1934 return match; 1935 } 1936 1937 /* XXX: to be scope conscious */ 1938 int 1939 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1940 { 1941 int bytelen, bitlen; 1942 1943 /* sanity check */ 1944 if (0 > len || len > 128) { 1945 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1946 len); 1947 return (0); 1948 } 1949 1950 bytelen = len / 8; 1951 bitlen = len % 8; 1952 1953 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1954 return (0); 1955 if (bitlen != 0 && 1956 p1->s6_addr[bytelen] >> (8 - bitlen) != 1957 p2->s6_addr[bytelen] >> (8 - bitlen)) 1958 return (0); 1959 1960 return (1); 1961 } 1962 1963 void 1964 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1965 { 1966 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1967 int bytelen, bitlen, i; 1968 1969 /* sanity check */ 1970 if (0 > len || len > 128) { 1971 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1972 len); 1973 return; 1974 } 1975 1976 bzero(maskp, sizeof(*maskp)); 1977 bytelen = len / 8; 1978 bitlen = len % 8; 1979 for (i = 0; i < bytelen; i++) 1980 maskp->s6_addr[i] = 0xff; 1981 if (bitlen) 1982 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1983 } 1984 1985 /* 1986 * return the best address out of the same scope. if no address was 1987 * found, return the first valid address from designated IF. 1988 */ 1989 struct in6_ifaddr * 1990 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1991 { 1992 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1993 struct ifaddr *ifa; 1994 struct in6_ifaddr *besta = 0; 1995 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1996 1997 dep[0] = dep[1] = NULL; 1998 1999 /* 2000 * We first look for addresses in the same scope. 2001 * If there is one, return it. 2002 * If two or more, return one which matches the dst longest. 2003 * If none, return one of global addresses assigned other ifs. 2004 */ 2005 IF_ADDR_RLOCK(ifp); 2006 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2007 if (ifa->ifa_addr->sa_family != AF_INET6) 2008 continue; 2009 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2010 continue; /* XXX: is there any case to allow anycast? */ 2011 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2012 continue; /* don't use this interface */ 2013 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2014 continue; 2015 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2016 if (V_ip6_use_deprecated) 2017 dep[0] = (struct in6_ifaddr *)ifa; 2018 continue; 2019 } 2020 2021 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2022 /* 2023 * call in6_matchlen() as few as possible 2024 */ 2025 if (besta) { 2026 if (blen == -1) 2027 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2028 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2029 if (tlen > blen) { 2030 blen = tlen; 2031 besta = (struct in6_ifaddr *)ifa; 2032 } 2033 } else 2034 besta = (struct in6_ifaddr *)ifa; 2035 } 2036 } 2037 if (besta) { 2038 ifa_ref(&besta->ia_ifa); 2039 IF_ADDR_RUNLOCK(ifp); 2040 return (besta); 2041 } 2042 2043 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2044 if (ifa->ifa_addr->sa_family != AF_INET6) 2045 continue; 2046 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2047 continue; /* XXX: is there any case to allow anycast? */ 2048 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2049 continue; /* don't use this interface */ 2050 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2051 continue; 2052 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2053 if (V_ip6_use_deprecated) 2054 dep[1] = (struct in6_ifaddr *)ifa; 2055 continue; 2056 } 2057 2058 if (ifa != NULL) 2059 ifa_ref(ifa); 2060 IF_ADDR_RUNLOCK(ifp); 2061 return (struct in6_ifaddr *)ifa; 2062 } 2063 2064 /* use the last-resort values, that are, deprecated addresses */ 2065 if (dep[0]) { 2066 ifa_ref((struct ifaddr *)dep[0]); 2067 IF_ADDR_RUNLOCK(ifp); 2068 return dep[0]; 2069 } 2070 if (dep[1]) { 2071 ifa_ref((struct ifaddr *)dep[1]); 2072 IF_ADDR_RUNLOCK(ifp); 2073 return dep[1]; 2074 } 2075 2076 IF_ADDR_RUNLOCK(ifp); 2077 return NULL; 2078 } 2079 2080 /* 2081 * perform DAD when interface becomes IFF_UP. 2082 */ 2083 void 2084 in6_if_up(struct ifnet *ifp) 2085 { 2086 struct ifaddr *ifa; 2087 struct in6_ifaddr *ia; 2088 2089 IF_ADDR_RLOCK(ifp); 2090 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2091 if (ifa->ifa_addr->sa_family != AF_INET6) 2092 continue; 2093 ia = (struct in6_ifaddr *)ifa; 2094 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2095 /* 2096 * The TENTATIVE flag was likely set by hand 2097 * beforehand, implicitly indicating the need for DAD. 2098 * We may be able to skip the random delay in this 2099 * case, but we impose delays just in case. 2100 */ 2101 nd6_dad_start(ifa, 2102 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2103 } 2104 } 2105 IF_ADDR_RUNLOCK(ifp); 2106 2107 /* 2108 * special cases, like 6to4, are handled in in6_ifattach 2109 */ 2110 in6_ifattach(ifp, NULL); 2111 } 2112 2113 int 2114 in6if_do_dad(struct ifnet *ifp) 2115 { 2116 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2117 return (0); 2118 2119 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 2120 return (0); 2121 2122 switch (ifp->if_type) { 2123 #ifdef IFT_DUMMY 2124 case IFT_DUMMY: 2125 #endif 2126 case IFT_FAITH: 2127 /* 2128 * These interfaces do not have the IFF_LOOPBACK flag, 2129 * but loop packets back. We do not have to do DAD on such 2130 * interfaces. We should even omit it, because loop-backed 2131 * NS would confuse the DAD procedure. 2132 */ 2133 return (0); 2134 default: 2135 /* 2136 * Our DAD routine requires the interface up and running. 2137 * However, some interfaces can be up before the RUNNING 2138 * status. Additionaly, users may try to assign addresses 2139 * before the interface becomes up (or running). 2140 * We simply skip DAD in such a case as a work around. 2141 * XXX: we should rather mark "tentative" on such addresses, 2142 * and do DAD after the interface becomes ready. 2143 */ 2144 if (!((ifp->if_flags & IFF_UP) && 2145 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2146 return (0); 2147 2148 return (1); 2149 } 2150 } 2151 2152 /* 2153 * Calculate max IPv6 MTU through all the interfaces and store it 2154 * to in6_maxmtu. 2155 */ 2156 void 2157 in6_setmaxmtu(void) 2158 { 2159 unsigned long maxmtu = 0; 2160 struct ifnet *ifp; 2161 2162 IFNET_RLOCK_NOSLEEP(); 2163 TAILQ_FOREACH(ifp, &V_ifnet, if_list) { 2164 /* this function can be called during ifnet initialization */ 2165 if (!ifp->if_afdata[AF_INET6]) 2166 continue; 2167 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2168 IN6_LINKMTU(ifp) > maxmtu) 2169 maxmtu = IN6_LINKMTU(ifp); 2170 } 2171 IFNET_RUNLOCK_NOSLEEP(); 2172 if (maxmtu) /* update only when maxmtu is positive */ 2173 V_in6_maxmtu = maxmtu; 2174 } 2175 2176 /* 2177 * Provide the length of interface identifiers to be used for the link attached 2178 * to the given interface. The length should be defined in "IPv6 over 2179 * xxx-link" document. Note that address architecture might also define 2180 * the length for a particular set of address prefixes, regardless of the 2181 * link type. As clarified in rfc2462bis, those two definitions should be 2182 * consistent, and those really are as of August 2004. 2183 */ 2184 int 2185 in6_if2idlen(struct ifnet *ifp) 2186 { 2187 switch (ifp->if_type) { 2188 case IFT_ETHER: /* RFC2464 */ 2189 #ifdef IFT_PROPVIRTUAL 2190 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2191 #endif 2192 #ifdef IFT_L2VLAN 2193 case IFT_L2VLAN: /* ditto */ 2194 #endif 2195 #ifdef IFT_IEEE80211 2196 case IFT_IEEE80211: /* ditto */ 2197 #endif 2198 #ifdef IFT_MIP 2199 case IFT_MIP: /* ditto */ 2200 #endif 2201 case IFT_INFINIBAND: 2202 return (64); 2203 case IFT_FDDI: /* RFC2467 */ 2204 return (64); 2205 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2206 return (64); 2207 case IFT_PPP: /* RFC2472 */ 2208 return (64); 2209 case IFT_ARCNET: /* RFC2497 */ 2210 return (64); 2211 case IFT_FRELAY: /* RFC2590 */ 2212 return (64); 2213 case IFT_IEEE1394: /* RFC3146 */ 2214 return (64); 2215 case IFT_GIF: 2216 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2217 case IFT_LOOP: 2218 return (64); /* XXX: is this really correct? */ 2219 default: 2220 /* 2221 * Unknown link type: 2222 * It might be controversial to use the today's common constant 2223 * of 64 for these cases unconditionally. For full compliance, 2224 * we should return an error in this case. On the other hand, 2225 * if we simply miss the standard for the link type or a new 2226 * standard is defined for a new link type, the IFID length 2227 * is very likely to be the common constant. As a compromise, 2228 * we always use the constant, but make an explicit notice 2229 * indicating the "unknown" case. 2230 */ 2231 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2232 return (64); 2233 } 2234 } 2235 2236 #include <sys/sysctl.h> 2237 2238 struct in6_llentry { 2239 struct llentry base; 2240 struct sockaddr_in6 l3_addr6; 2241 }; 2242 2243 /* 2244 * Deletes an address from the address table. 2245 * This function is called by the timer functions 2246 * such as arptimer() and nd6_llinfo_timer(), and 2247 * the caller does the locking. 2248 */ 2249 static void 2250 in6_lltable_free(struct lltable *llt, struct llentry *lle) 2251 { 2252 LLE_WUNLOCK(lle); 2253 LLE_LOCK_DESTROY(lle); 2254 free(lle, M_LLTABLE); 2255 } 2256 2257 static struct llentry * 2258 in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2259 { 2260 struct in6_llentry *lle; 2261 2262 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2263 if (lle == NULL) /* NB: caller generates msg */ 2264 return NULL; 2265 2266 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2267 lle->base.lle_refcnt = 1; 2268 lle->base.lle_free = in6_lltable_free; 2269 LLE_LOCK_INIT(&lle->base); 2270 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock, 2271 CALLOUT_RETURNUNLOCKED); 2272 2273 return (&lle->base); 2274 } 2275 2276 static void 2277 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 2278 const struct sockaddr *mask, u_int flags) 2279 { 2280 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2281 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2282 struct llentry *lle, *next; 2283 int i; 2284 2285 /* 2286 * (flags & LLE_STATIC) means deleting all entries 2287 * including static ND6 entries. 2288 */ 2289 IF_AFDATA_WLOCK(llt->llt_ifp); 2290 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2291 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2292 if (IN6_ARE_MASKED_ADDR_EQUAL( 2293 &satosin6(L3_ADDR(lle))->sin6_addr, 2294 &pfx->sin6_addr, &msk->sin6_addr) && 2295 ((flags & LLE_STATIC) || 2296 !(lle->la_flags & LLE_STATIC))) { 2297 LLE_WLOCK(lle); 2298 if (callout_stop(&lle->la_timer)) 2299 LLE_REMREF(lle); 2300 llentry_free(lle); 2301 } 2302 } 2303 } 2304 IF_AFDATA_WUNLOCK(llt->llt_ifp); 2305 } 2306 2307 static int 2308 in6_lltable_rtcheck(struct ifnet *ifp, 2309 u_int flags, 2310 const struct sockaddr *l3addr) 2311 { 2312 struct rtentry *rt; 2313 char ip6buf[INET6_ADDRSTRLEN]; 2314 2315 KASSERT(l3addr->sa_family == AF_INET6, 2316 ("sin_family %d", l3addr->sa_family)); 2317 2318 /* Our local addresses are always only installed on the default FIB. */ 2319 /* XXX rtalloc1 should take a const param */ 2320 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0, 2321 RT_DEFAULT_FIB); 2322 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2323 struct ifaddr *ifa; 2324 /* 2325 * Create an ND6 cache for an IPv6 neighbor 2326 * that is not covered by our own prefix. 2327 */ 2328 /* XXX ifaof_ifpforaddr should take a const param */ 2329 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2330 if (ifa != NULL) { 2331 ifa_free(ifa); 2332 if (rt != NULL) 2333 RTFREE_LOCKED(rt); 2334 return 0; 2335 } 2336 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2337 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2338 if (rt != NULL) 2339 RTFREE_LOCKED(rt); 2340 return EINVAL; 2341 } 2342 RTFREE_LOCKED(rt); 2343 return 0; 2344 } 2345 2346 static struct llentry * 2347 in6_lltable_lookup(struct lltable *llt, u_int flags, 2348 const struct sockaddr *l3addr) 2349 { 2350 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2351 struct ifnet *ifp = llt->llt_ifp; 2352 struct llentry *lle; 2353 struct llentries *lleh; 2354 u_int hashkey; 2355 2356 IF_AFDATA_LOCK_ASSERT(ifp); 2357 KASSERT(l3addr->sa_family == AF_INET6, 2358 ("sin_family %d", l3addr->sa_family)); 2359 2360 hashkey = sin6->sin6_addr.s6_addr32[3]; 2361 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2362 LIST_FOREACH(lle, lleh, lle_next) { 2363 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2364 if (lle->la_flags & LLE_DELETED) 2365 continue; 2366 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2367 sizeof(struct in6_addr)) == 0) 2368 break; 2369 } 2370 2371 if (lle == NULL) { 2372 if (!(flags & LLE_CREATE)) 2373 return (NULL); 2374 IF_AFDATA_WLOCK_ASSERT(ifp); 2375 /* 2376 * A route that covers the given address must have 2377 * been installed 1st because we are doing a resolution, 2378 * verify this. 2379 */ 2380 if (!(flags & LLE_IFADDR) && 2381 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2382 return NULL; 2383 2384 lle = in6_lltable_new(l3addr, flags); 2385 if (lle == NULL) { 2386 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2387 return NULL; 2388 } 2389 lle->la_flags = flags & ~LLE_CREATE; 2390 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2391 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2392 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2393 } 2394 2395 lle->lle_tbl = llt; 2396 lle->lle_head = lleh; 2397 lle->la_flags |= LLE_LINKED; 2398 LIST_INSERT_HEAD(lleh, lle, lle_next); 2399 } else if (flags & LLE_DELETE) { 2400 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2401 LLE_WLOCK(lle); 2402 lle->la_flags |= LLE_DELETED; 2403 #ifdef DIAGNOSTIC 2404 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2405 #endif 2406 if ((lle->la_flags & 2407 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 2408 llentry_free(lle); 2409 else 2410 LLE_WUNLOCK(lle); 2411 } 2412 lle = (void *)-1; 2413 } 2414 if (LLE_IS_VALID(lle)) { 2415 if (flags & LLE_EXCLUSIVE) 2416 LLE_WLOCK(lle); 2417 else 2418 LLE_RLOCK(lle); 2419 } 2420 return (lle); 2421 } 2422 2423 static int 2424 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2425 { 2426 struct ifnet *ifp = llt->llt_ifp; 2427 struct llentry *lle; 2428 /* XXX stack use */ 2429 struct { 2430 struct rt_msghdr rtm; 2431 struct sockaddr_in6 sin6; 2432 /* 2433 * ndp.c assumes that sdl is word aligned 2434 */ 2435 #ifdef __LP64__ 2436 uint32_t pad; 2437 #endif 2438 struct sockaddr_dl sdl; 2439 } ndpc; 2440 int i, error; 2441 2442 if (ifp->if_flags & IFF_LOOPBACK) 2443 return 0; 2444 2445 LLTABLE_LOCK_ASSERT(); 2446 2447 error = 0; 2448 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2449 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2450 struct sockaddr_dl *sdl; 2451 2452 /* skip deleted or invalid entries */ 2453 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2454 continue; 2455 /* Skip if jailed and not a valid IP of the prison. */ 2456 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2457 continue; 2458 /* 2459 * produce a msg made of: 2460 * struct rt_msghdr; 2461 * struct sockaddr_in6 (IPv6) 2462 * struct sockaddr_dl; 2463 */ 2464 bzero(&ndpc, sizeof(ndpc)); 2465 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2466 ndpc.rtm.rtm_version = RTM_VERSION; 2467 ndpc.rtm.rtm_type = RTM_GET; 2468 ndpc.rtm.rtm_flags = RTF_UP; 2469 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2470 ndpc.sin6.sin6_family = AF_INET6; 2471 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2472 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2473 if (V_deembed_scopeid) 2474 sa6_recoverscope(&ndpc.sin6); 2475 2476 /* publish */ 2477 if (lle->la_flags & LLE_PUB) 2478 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2479 2480 sdl = &ndpc.sdl; 2481 sdl->sdl_family = AF_LINK; 2482 sdl->sdl_len = sizeof(*sdl); 2483 sdl->sdl_alen = ifp->if_addrlen; 2484 sdl->sdl_index = ifp->if_index; 2485 sdl->sdl_type = ifp->if_type; 2486 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2487 ndpc.rtm.rtm_rmx.rmx_expire = 2488 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2489 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2490 if (lle->la_flags & LLE_STATIC) 2491 ndpc.rtm.rtm_flags |= RTF_STATIC; 2492 ndpc.rtm.rtm_index = ifp->if_index; 2493 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2494 if (error) 2495 break; 2496 } 2497 } 2498 return error; 2499 } 2500 2501 void * 2502 in6_domifattach(struct ifnet *ifp) 2503 { 2504 struct in6_ifextra *ext; 2505 2506 /* There are not IPv6-capable interfaces. */ 2507 switch (ifp->if_type) { 2508 case IFT_PFLOG: 2509 case IFT_PFSYNC: 2510 case IFT_USB: 2511 return (NULL); 2512 } 2513 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2514 bzero(ext, sizeof(*ext)); 2515 2516 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2517 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2518 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2519 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2520 2521 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2522 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2523 M_WAITOK); 2524 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2525 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2526 2527 ext->nd_ifinfo = nd6_ifattach(ifp); 2528 ext->scope6_id = scope6_ifattach(ifp); 2529 ext->lltable = lltable_init(ifp, AF_INET6); 2530 if (ext->lltable != NULL) { 2531 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2532 ext->lltable->llt_lookup = in6_lltable_lookup; 2533 ext->lltable->llt_dump = in6_lltable_dump; 2534 } 2535 2536 ext->mld_ifinfo = mld_domifattach(ifp); 2537 2538 return ext; 2539 } 2540 2541 void 2542 in6_domifdetach(struct ifnet *ifp, void *aux) 2543 { 2544 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2545 2546 mld_domifdetach(ifp); 2547 scope6_ifdetach(ext->scope6_id); 2548 nd6_ifdetach(ext->nd_ifinfo); 2549 lltable_free(ext->lltable); 2550 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2551 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2552 free(ext->in6_ifstat, M_IFADDR); 2553 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2554 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2555 free(ext->icmp6_ifstat, M_IFADDR); 2556 free(ext, M_IFADDR); 2557 } 2558 2559 /* 2560 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2561 * v4 mapped addr or v4 compat addr 2562 */ 2563 void 2564 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2565 { 2566 2567 bzero(sin, sizeof(*sin)); 2568 sin->sin_len = sizeof(struct sockaddr_in); 2569 sin->sin_family = AF_INET; 2570 sin->sin_port = sin6->sin6_port; 2571 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2572 } 2573 2574 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2575 void 2576 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2577 { 2578 bzero(sin6, sizeof(*sin6)); 2579 sin6->sin6_len = sizeof(struct sockaddr_in6); 2580 sin6->sin6_family = AF_INET6; 2581 sin6->sin6_port = sin->sin_port; 2582 sin6->sin6_addr.s6_addr32[0] = 0; 2583 sin6->sin6_addr.s6_addr32[1] = 0; 2584 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2585 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2586 } 2587 2588 /* Convert sockaddr_in6 into sockaddr_in. */ 2589 void 2590 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2591 { 2592 struct sockaddr_in *sin_p; 2593 struct sockaddr_in6 sin6; 2594 2595 /* 2596 * Save original sockaddr_in6 addr and convert it 2597 * to sockaddr_in. 2598 */ 2599 sin6 = *(struct sockaddr_in6 *)nam; 2600 sin_p = (struct sockaddr_in *)nam; 2601 in6_sin6_2_sin(sin_p, &sin6); 2602 } 2603 2604 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2605 void 2606 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2607 { 2608 struct sockaddr_in *sin_p; 2609 struct sockaddr_in6 *sin6_p; 2610 2611 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2612 sin_p = (struct sockaddr_in *)*nam; 2613 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2614 free(*nam, M_SONAME); 2615 *nam = (struct sockaddr *)sin6_p; 2616 } 2617