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/lock.h> 84 #include <sys/rmlock.h> 85 #include <sys/syslog.h> 86 87 #include <net/if.h> 88 #include <net/if_var.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 #include <net/if_dl.h> 92 #include <net/vnet.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_var.h> 96 #include <net/if_llatbl.h> 97 #include <netinet/if_ether.h> 98 #include <netinet/in_systm.h> 99 #include <netinet/ip.h> 100 #include <netinet/in_pcb.h> 101 #include <netinet/ip_carp.h> 102 103 #include <netinet/ip6.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet6/nd6.h> 106 #include <netinet6/mld6_var.h> 107 #include <netinet6/ip6_mroute.h> 108 #include <netinet6/in6_ifattach.h> 109 #include <netinet6/scope6_var.h> 110 #include <netinet6/in6_pcb.h> 111 112 VNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 113 #define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 114 115 /* 116 * Definitions of some costant IP6 addresses. 117 */ 118 const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 119 const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 120 const struct in6_addr in6addr_nodelocal_allnodes = 121 IN6ADDR_NODELOCAL_ALLNODES_INIT; 122 const struct in6_addr in6addr_linklocal_allnodes = 123 IN6ADDR_LINKLOCAL_ALLNODES_INIT; 124 const struct in6_addr in6addr_linklocal_allrouters = 125 IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 126 const struct in6_addr in6addr_linklocal_allv2routers = 127 IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 128 129 const struct in6_addr in6mask0 = IN6MASK0; 130 const struct in6_addr in6mask32 = IN6MASK32; 131 const struct in6_addr in6mask64 = IN6MASK64; 132 const struct in6_addr in6mask96 = IN6MASK96; 133 const struct in6_addr in6mask128 = IN6MASK128; 134 135 const struct sockaddr_in6 sa6_any = 136 { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 137 138 static int in6_notify_ifa(struct ifnet *, struct in6_ifaddr *, 139 struct in6_aliasreq *, int); 140 static void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 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 SIOCGNBRINFO_IN6: 285 case SIOCGDEFIFACE_IN6: 286 return (nd6_ioctl(cmd, data, ifp)); 287 288 #ifdef COMPAT_FREEBSD32 289 case SIOCGDEFIFACE32_IN6: 290 { 291 struct in6_ndifreq ndif; 292 struct in6_ndifreq32 *ndif32; 293 294 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 295 ifp); 296 if (error) 297 return (error); 298 ndif32 = (struct in6_ndifreq32 *)data; 299 ndif32->ifindex = ndif.ifindex; 300 return (0); 301 } 302 #endif 303 } 304 305 switch (cmd) { 306 case SIOCSIFPREFIX_IN6: 307 case SIOCDIFPREFIX_IN6: 308 case SIOCAIFPREFIX_IN6: 309 case SIOCCIFPREFIX_IN6: 310 case SIOCSGIFPREFIX_IN6: 311 case SIOCGIFPREFIX_IN6: 312 log(LOG_NOTICE, 313 "prefix ioctls are now invalidated. " 314 "please use ifconfig.\n"); 315 return (EOPNOTSUPP); 316 } 317 318 switch (cmd) { 319 case SIOCSSCOPE6: 320 if (td != NULL) { 321 error = priv_check(td, PRIV_NETINET_SCOPE6); 322 if (error) 323 return (error); 324 } 325 /* FALLTHROUGH */ 326 case SIOCGSCOPE6: 327 case SIOCGSCOPE6DEF: 328 return (scope6_ioctl(cmd, data, ifp)); 329 } 330 331 /* 332 * Find address for this interface, if it exists. 333 * 334 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 335 * only, and used the first interface address as the target of other 336 * operations (without checking ifra_addr). This was because netinet 337 * code/API assumed at most 1 interface address per interface. 338 * Since IPv6 allows a node to assign multiple addresses 339 * on a single interface, we almost always look and check the 340 * presence of ifra_addr, and reject invalid ones here. 341 * It also decreases duplicated code among SIOC*_IN6 operations. 342 */ 343 switch (cmd) { 344 case SIOCAIFADDR_IN6: 345 case SIOCSIFPHYADDR_IN6: 346 sa6 = &ifra->ifra_addr; 347 break; 348 case SIOCSIFADDR_IN6: 349 case SIOCGIFADDR_IN6: 350 case SIOCSIFDSTADDR_IN6: 351 case SIOCSIFNETMASK_IN6: 352 case SIOCGIFDSTADDR_IN6: 353 case SIOCGIFNETMASK_IN6: 354 case SIOCDIFADDR_IN6: 355 case SIOCGIFPSRCADDR_IN6: 356 case SIOCGIFPDSTADDR_IN6: 357 case SIOCGIFAFLAG_IN6: 358 case SIOCSNDFLUSH_IN6: 359 case SIOCSPFXFLUSH_IN6: 360 case SIOCSRTRFLUSH_IN6: 361 case SIOCGIFALIFETIME_IN6: 362 case SIOCSIFALIFETIME_IN6: 363 case SIOCGIFSTAT_IN6: 364 case SIOCGIFSTAT_ICMP6: 365 sa6 = &ifr->ifr_addr; 366 break; 367 case SIOCSIFADDR: 368 case SIOCSIFBRDADDR: 369 case SIOCSIFDSTADDR: 370 case SIOCSIFNETMASK: 371 /* 372 * Although we should pass any non-INET6 ioctl requests 373 * down to driver, we filter some legacy INET requests. 374 * Drivers trust SIOCSIFADDR et al to come from an already 375 * privileged layer, and do not perform any credentials 376 * checks or input validation. 377 */ 378 return (EINVAL); 379 default: 380 sa6 = NULL; 381 break; 382 } 383 if (sa6 && sa6->sin6_family == AF_INET6) { 384 if (sa6->sin6_scope_id != 0) 385 error = sa6_embedscope(sa6, 0); 386 else 387 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 388 if (error != 0) 389 return (error); 390 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 391 &sa6->sin6_addr)) != 0) 392 return (error); 393 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 394 } else 395 ia = NULL; 396 397 switch (cmd) { 398 case SIOCSIFADDR_IN6: 399 case SIOCSIFDSTADDR_IN6: 400 case SIOCSIFNETMASK_IN6: 401 /* 402 * Since IPv6 allows a node to assign multiple addresses 403 * on a single interface, SIOCSIFxxx ioctls are deprecated. 404 */ 405 /* we decided to obsolete this command (20000704) */ 406 error = EINVAL; 407 goto out; 408 409 case SIOCDIFADDR_IN6: 410 /* 411 * for IPv4, we look for existing in_ifaddr here to allow 412 * "ifconfig if0 delete" to remove the first IPv4 address on 413 * the interface. For IPv6, as the spec allows multiple 414 * interface address from the day one, we consider "remove the 415 * first one" semantics to be not preferable. 416 */ 417 if (ia == NULL) { 418 error = EADDRNOTAVAIL; 419 goto out; 420 } 421 /* FALLTHROUGH */ 422 case SIOCAIFADDR_IN6: 423 /* 424 * We always require users to specify a valid IPv6 address for 425 * the corresponding operation. 426 */ 427 if (ifra->ifra_addr.sin6_family != AF_INET6 || 428 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 429 error = EAFNOSUPPORT; 430 goto out; 431 } 432 433 if (td != NULL) { 434 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 435 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 436 if (error) 437 goto out; 438 } 439 /* FALLTHROUGH */ 440 case SIOCGIFSTAT_IN6: 441 case SIOCGIFSTAT_ICMP6: 442 if (ifp->if_afdata[AF_INET6] == NULL) { 443 error = EPFNOSUPPORT; 444 goto out; 445 } 446 break; 447 448 case SIOCGIFADDR_IN6: 449 /* This interface is basically deprecated. use SIOCGIFCONF. */ 450 /* FALLTHROUGH */ 451 case SIOCGIFAFLAG_IN6: 452 case SIOCGIFNETMASK_IN6: 453 case SIOCGIFDSTADDR_IN6: 454 case SIOCGIFALIFETIME_IN6: 455 /* must think again about its semantics */ 456 if (ia == NULL) { 457 error = EADDRNOTAVAIL; 458 goto out; 459 } 460 break; 461 462 case SIOCSIFALIFETIME_IN6: 463 { 464 struct in6_addrlifetime *lt; 465 466 if (td != NULL) { 467 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 468 if (error) 469 goto out; 470 } 471 if (ia == NULL) { 472 error = EADDRNOTAVAIL; 473 goto out; 474 } 475 /* sanity for overflow - beware unsigned */ 476 lt = &ifr->ifr_ifru.ifru_lifetime; 477 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 478 lt->ia6t_vltime + time_uptime < time_uptime) { 479 error = EINVAL; 480 goto out; 481 } 482 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 483 lt->ia6t_pltime + time_uptime < time_uptime) { 484 error = EINVAL; 485 goto out; 486 } 487 break; 488 } 489 } 490 491 switch (cmd) { 492 case SIOCGIFADDR_IN6: 493 ifr->ifr_addr = ia->ia_addr; 494 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 495 goto out; 496 break; 497 498 case SIOCGIFDSTADDR_IN6: 499 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 500 error = EINVAL; 501 goto out; 502 } 503 /* 504 * XXX: should we check if ifa_dstaddr is NULL and return 505 * an error? 506 */ 507 ifr->ifr_dstaddr = ia->ia_dstaddr; 508 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 509 goto out; 510 break; 511 512 case SIOCGIFNETMASK_IN6: 513 ifr->ifr_addr = ia->ia_prefixmask; 514 break; 515 516 case SIOCGIFAFLAG_IN6: 517 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 518 break; 519 520 case SIOCGIFSTAT_IN6: 521 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 522 ifp->if_afdata[AF_INET6])->in6_ifstat, 523 &ifr->ifr_ifru.ifru_stat, 524 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 525 break; 526 527 case SIOCGIFSTAT_ICMP6: 528 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 529 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 530 &ifr->ifr_ifru.ifru_icmp6stat, 531 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 532 break; 533 534 case SIOCGIFALIFETIME_IN6: 535 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 536 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 537 time_t maxexpire; 538 struct in6_addrlifetime *retlt = 539 &ifr->ifr_ifru.ifru_lifetime; 540 541 /* 542 * XXX: adjust expiration time assuming time_t is 543 * signed. 544 */ 545 maxexpire = (-1) & 546 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 547 if (ia->ia6_lifetime.ia6t_vltime < 548 maxexpire - ia->ia6_updatetime) { 549 retlt->ia6t_expire = ia->ia6_updatetime + 550 ia->ia6_lifetime.ia6t_vltime; 551 } else 552 retlt->ia6t_expire = maxexpire; 553 } 554 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 555 time_t maxexpire; 556 struct in6_addrlifetime *retlt = 557 &ifr->ifr_ifru.ifru_lifetime; 558 559 /* 560 * XXX: adjust expiration time assuming time_t is 561 * signed. 562 */ 563 maxexpire = (-1) & 564 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 565 if (ia->ia6_lifetime.ia6t_pltime < 566 maxexpire - ia->ia6_updatetime) { 567 retlt->ia6t_preferred = ia->ia6_updatetime + 568 ia->ia6_lifetime.ia6t_pltime; 569 } else 570 retlt->ia6t_preferred = maxexpire; 571 } 572 break; 573 574 case SIOCSIFALIFETIME_IN6: 575 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 576 /* for sanity */ 577 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 578 ia->ia6_lifetime.ia6t_expire = 579 time_uptime + ia->ia6_lifetime.ia6t_vltime; 580 } else 581 ia->ia6_lifetime.ia6t_expire = 0; 582 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 583 ia->ia6_lifetime.ia6t_preferred = 584 time_uptime + ia->ia6_lifetime.ia6t_pltime; 585 } else 586 ia->ia6_lifetime.ia6t_preferred = 0; 587 break; 588 589 case SIOCAIFADDR_IN6: 590 { 591 struct nd_prefixctl pr0; 592 struct nd_prefix *pr; 593 594 /* 595 * first, make or update the interface address structure, 596 * and link it to the list. 597 */ 598 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 599 goto out; 600 if (ia != NULL) 601 ifa_free(&ia->ia_ifa); 602 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 603 == NULL) { 604 /* 605 * this can happen when the user specify the 0 valid 606 * lifetime. 607 */ 608 break; 609 } 610 611 if (cmd == ocmd && ifra->ifra_vhid > 0) { 612 if (carp_attach_p != NULL) 613 error = (*carp_attach_p)(&ia->ia_ifa, 614 ifra->ifra_vhid); 615 else 616 error = EPROTONOSUPPORT; 617 if (error) 618 goto out; 619 else 620 carp_attached = 1; 621 } 622 623 /* 624 * then, make the prefix on-link on the interface. 625 * XXX: we'd rather create the prefix before the address, but 626 * we need at least one address to install the corresponding 627 * interface route, so we configure the address first. 628 */ 629 630 /* 631 * convert mask to prefix length (prefixmask has already 632 * been validated in in6_update_ifa(). 633 */ 634 bzero(&pr0, sizeof(pr0)); 635 pr0.ndpr_ifp = ifp; 636 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 637 NULL); 638 if (pr0.ndpr_plen == 128) { 639 /* we don't need to install a host route. */ 640 goto aifaddr_out; 641 } 642 pr0.ndpr_prefix = ifra->ifra_addr; 643 /* apply the mask for safety. */ 644 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 645 &ifra->ifra_prefixmask.sin6_addr); 646 647 /* 648 * XXX: since we don't have an API to set prefix (not address) 649 * lifetimes, we just use the same lifetimes as addresses. 650 * The (temporarily) installed lifetimes can be overridden by 651 * later advertised RAs (when accept_rtadv is non 0), which is 652 * an intended behavior. 653 */ 654 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 655 pr0.ndpr_raf_auto = 656 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 657 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 658 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 659 660 /* add the prefix if not yet. */ 661 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 662 /* 663 * nd6_prelist_add will install the corresponding 664 * interface route. 665 */ 666 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 667 if (carp_attached) 668 (*carp_detach_p)(&ia->ia_ifa); 669 goto out; 670 } 671 if (pr == NULL) { 672 if (carp_attached) 673 (*carp_detach_p)(&ia->ia_ifa); 674 log(LOG_ERR, "nd6_prelist_add succeeded but " 675 "no prefix\n"); 676 error = EINVAL; 677 goto out; 678 } 679 } 680 681 /* relate the address to the prefix */ 682 if (ia->ia6_ndpr == NULL) { 683 ia->ia6_ndpr = pr; 684 pr->ndpr_refcnt++; 685 686 /* 687 * If this is the first autoconf address from the 688 * prefix, create a temporary address as well 689 * (when required). 690 */ 691 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 692 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 693 int e; 694 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 695 log(LOG_NOTICE, "in6_control: failed " 696 "to create a temporary address, " 697 "errno=%d\n", e); 698 } 699 } 700 } 701 702 /* 703 * this might affect the status of autoconfigured addresses, 704 * that is, this address might make other addresses detached. 705 */ 706 pfxlist_onlink_check(); 707 aifaddr_out: 708 if (error != 0 || ia == NULL) 709 break; 710 /* 711 * Try to clear the flag when a new IPv6 address is added 712 * onto an IFDISABLED interface and it succeeds. 713 */ 714 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 715 struct in6_ndireq nd; 716 717 memset(&nd, 0, sizeof(nd)); 718 nd.ndi.flags = ND_IFINFO(ifp)->flags; 719 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 720 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 721 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 722 "SIOCSIFINFO_FLAGS for -ifdisabled " 723 "failed."); 724 /* 725 * Ignore failure of clearing the flag intentionally. 726 * The failure means address duplication was detected. 727 */ 728 } 729 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 730 break; 731 } 732 733 case SIOCDIFADDR_IN6: 734 { 735 struct nd_prefix *pr; 736 737 /* 738 * If the address being deleted is the only one that owns 739 * the corresponding prefix, expire the prefix as well. 740 * XXX: theoretically, we don't have to worry about such 741 * relationship, since we separate the address management 742 * and the prefix management. We do this, however, to provide 743 * as much backward compatibility as possible in terms of 744 * the ioctl operation. 745 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 746 */ 747 pr = ia->ia6_ndpr; 748 in6_purgeaddr(&ia->ia_ifa); 749 if (pr && pr->ndpr_refcnt == 0) 750 prelist_remove(pr); 751 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 752 break; 753 } 754 755 default: 756 if (ifp->if_ioctl == NULL) { 757 error = EOPNOTSUPP; 758 goto out; 759 } 760 error = (*ifp->if_ioctl)(ifp, cmd, data); 761 goto out; 762 } 763 764 error = 0; 765 out: 766 if (ia != NULL) 767 ifa_free(&ia->ia_ifa); 768 return (error); 769 } 770 771 772 /* 773 * Join necessary multicast groups. Factored out from in6_update_ifa(). 774 * This entire work should only be done once, for the default FIB. 775 */ 776 static int 777 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 778 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 779 { 780 char ip6buf[INET6_ADDRSTRLEN]; 781 struct in6_addr mltaddr; 782 struct in6_multi_mship *imm; 783 int delay, error; 784 785 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 786 787 /* Join solicited multicast addr for new host id. */ 788 bzero(&mltaddr, sizeof(struct in6_addr)); 789 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 790 mltaddr.s6_addr32[2] = htonl(1); 791 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 792 mltaddr.s6_addr8[12] = 0xff; 793 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 794 /* XXX: should not happen */ 795 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 796 goto cleanup; 797 } 798 delay = error = 0; 799 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 800 /* 801 * We need a random delay for DAD on the address being 802 * configured. It also means delaying transmission of the 803 * corresponding MLD report to avoid report collision. 804 * [RFC 4861, Section 6.3.7] 805 */ 806 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 807 } 808 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 809 if (imm == NULL) { 810 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 811 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 812 if_name(ifp), error)); 813 goto cleanup; 814 } 815 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 816 *in6m_sol = imm->i6mm_maddr; 817 818 /* 819 * Join link-local all-nodes address. 820 */ 821 mltaddr = in6addr_linklocal_allnodes; 822 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 823 goto cleanup; /* XXX: should not fail */ 824 825 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 826 if (imm == NULL) { 827 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 828 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 829 if_name(ifp), error)); 830 goto cleanup; 831 } 832 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 833 834 /* 835 * Join node information group address. 836 */ 837 delay = 0; 838 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 839 /* 840 * The spec does not say anything about delay for this group, 841 * but the same logic should apply. 842 */ 843 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 844 } 845 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 846 /* XXX jinmei */ 847 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 848 if (imm == NULL) 849 nd6log((LOG_WARNING, 850 "%s: in6_joingroup failed for %s on %s " 851 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 852 &mltaddr), if_name(ifp), error)); 853 /* XXX not very fatal, go on... */ 854 else 855 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 856 } 857 if (V_icmp6_nodeinfo_oldmcprefix && 858 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 859 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 860 if (imm == NULL) 861 nd6log((LOG_WARNING, 862 "%s: in6_joingroup failed for %s on %s " 863 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 864 &mltaddr), if_name(ifp), error)); 865 /* XXX not very fatal, go on... */ 866 else 867 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 868 } 869 870 /* 871 * Join interface-local all-nodes address. 872 * (ff01::1%ifN, and ff01::%ifN/32) 873 */ 874 mltaddr = in6addr_nodelocal_allnodes; 875 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 876 goto cleanup; /* XXX: should not fail */ 877 878 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 879 if (imm == NULL) { 880 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 881 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 882 &mltaddr), if_name(ifp), error)); 883 goto cleanup; 884 } 885 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 886 887 cleanup: 888 return (error); 889 } 890 891 /* 892 * Update parameters of an IPv6 interface address. 893 * If necessary, a new entry is created and linked into address chains. 894 * This function is separated from in6_control(). 895 */ 896 int 897 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 898 struct in6_ifaddr *ia, int flags) 899 { 900 int error, hostIsNew = 0; 901 902 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 903 return (error); 904 905 if (ia == NULL) { 906 hostIsNew = 1; 907 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 908 return (ENOBUFS); 909 } 910 911 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 912 if (error != 0) { 913 if (hostIsNew != 0) { 914 in6_unlink_ifa(ia, ifp); 915 ifa_free(&ia->ia_ifa); 916 } 917 return (error); 918 } 919 920 if (hostIsNew) 921 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 922 923 return (error); 924 } 925 926 /* 927 * Fill in basic IPv6 address request info. 928 */ 929 void 930 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 931 const struct in6_addr *mask) 932 { 933 934 memset(ifra, 0, sizeof(struct in6_aliasreq)); 935 936 ifra->ifra_addr.sin6_family = AF_INET6; 937 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 938 if (addr != NULL) 939 ifra->ifra_addr.sin6_addr = *addr; 940 941 ifra->ifra_prefixmask.sin6_family = AF_INET6; 942 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 943 if (mask != NULL) 944 ifra->ifra_prefixmask.sin6_addr = *mask; 945 } 946 947 static int 948 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 949 struct in6_ifaddr *ia, int flags) 950 { 951 int plen = -1; 952 struct sockaddr_in6 dst6; 953 struct in6_addrlifetime *lt; 954 char ip6buf[INET6_ADDRSTRLEN]; 955 956 /* Validate parameters */ 957 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 958 return (EINVAL); 959 960 /* 961 * The destination address for a p2p link must have a family 962 * of AF_UNSPEC or AF_INET6. 963 */ 964 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 965 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 966 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 967 return (EAFNOSUPPORT); 968 969 /* 970 * Validate address 971 */ 972 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 973 ifra->ifra_addr.sin6_family != AF_INET6) 974 return (EINVAL); 975 976 /* 977 * validate ifra_prefixmask. don't check sin6_family, netmask 978 * does not carry fields other than sin6_len. 979 */ 980 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 981 return (EINVAL); 982 /* 983 * Because the IPv6 address architecture is classless, we require 984 * users to specify a (non 0) prefix length (mask) for a new address. 985 * We also require the prefix (when specified) mask is valid, and thus 986 * reject a non-consecutive mask. 987 */ 988 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 989 return (EINVAL); 990 if (ifra->ifra_prefixmask.sin6_len != 0) { 991 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 992 (u_char *)&ifra->ifra_prefixmask + 993 ifra->ifra_prefixmask.sin6_len); 994 if (plen <= 0) 995 return (EINVAL); 996 } else { 997 /* 998 * In this case, ia must not be NULL. We just use its prefix 999 * length. 1000 */ 1001 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1002 } 1003 /* 1004 * If the destination address on a p2p interface is specified, 1005 * and the address is a scoped one, validate/set the scope 1006 * zone identifier. 1007 */ 1008 dst6 = ifra->ifra_dstaddr; 1009 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1010 (dst6.sin6_family == AF_INET6)) { 1011 struct in6_addr in6_tmp; 1012 u_int32_t zoneid; 1013 1014 in6_tmp = dst6.sin6_addr; 1015 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1016 return (EINVAL); /* XXX: should be impossible */ 1017 1018 if (dst6.sin6_scope_id != 0) { 1019 if (dst6.sin6_scope_id != zoneid) 1020 return (EINVAL); 1021 } else /* user omit to specify the ID. */ 1022 dst6.sin6_scope_id = zoneid; 1023 1024 /* convert into the internal form */ 1025 if (sa6_embedscope(&dst6, 0)) 1026 return (EINVAL); /* XXX: should be impossible */ 1027 } 1028 /* Modify original ifra_dstaddr to reflect changes */ 1029 ifra->ifra_dstaddr = dst6; 1030 1031 /* 1032 * The destination address can be specified only for a p2p or a 1033 * loopback interface. If specified, the corresponding prefix length 1034 * must be 128. 1035 */ 1036 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1037 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1038 /* XXX: noisy message */ 1039 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1040 "be specified for a p2p or a loopback IF only\n")); 1041 return (EINVAL); 1042 } 1043 if (plen != 128) { 1044 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1045 "be 128 when dstaddr is specified\n")); 1046 return (EINVAL); 1047 } 1048 } 1049 /* lifetime consistency check */ 1050 lt = &ifra->ifra_lifetime; 1051 if (lt->ia6t_pltime > lt->ia6t_vltime) 1052 return (EINVAL); 1053 if (lt->ia6t_vltime == 0) { 1054 /* 1055 * the following log might be noisy, but this is a typical 1056 * configuration mistake or a tool's bug. 1057 */ 1058 nd6log((LOG_INFO, 1059 "in6_update_ifa: valid lifetime is 0 for %s\n", 1060 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1061 1062 if (ia == NULL) 1063 return (0); /* there's nothing to do */ 1064 } 1065 1066 /* Check prefix mask */ 1067 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1068 /* 1069 * We prohibit changing the prefix length of an existing 1070 * address, because 1071 * + such an operation should be rare in IPv6, and 1072 * + the operation would confuse prefix management. 1073 */ 1074 if (ia->ia_prefixmask.sin6_len != 0 && 1075 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1076 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1077 "of an existing %s address should not be changed\n", 1078 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1079 1080 return (EINVAL); 1081 } 1082 } 1083 1084 return (0); 1085 } 1086 1087 1088 /* 1089 * Allocate a new ifaddr and link it into chains. 1090 */ 1091 static struct in6_ifaddr * 1092 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1093 { 1094 struct in6_ifaddr *ia; 1095 1096 /* 1097 * When in6_alloc_ifa() is called in a process of a received 1098 * RA, it is called under an interrupt context. So, we should 1099 * call malloc with M_NOWAIT. 1100 */ 1101 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1102 if (ia == NULL) 1103 return (NULL); 1104 LIST_INIT(&ia->ia6_memberships); 1105 /* Initialize the address and masks, and put time stamp */ 1106 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1107 ia->ia_addr.sin6_family = AF_INET6; 1108 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1109 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1110 ia->ia_addr = ifra->ifra_addr; 1111 ia->ia6_createtime = time_uptime; 1112 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1113 /* 1114 * Some functions expect that ifa_dstaddr is not 1115 * NULL for p2p interfaces. 1116 */ 1117 ia->ia_ifa.ifa_dstaddr = 1118 (struct sockaddr *)&ia->ia_dstaddr; 1119 } else { 1120 ia->ia_ifa.ifa_dstaddr = NULL; 1121 } 1122 1123 /* set prefix mask if any */ 1124 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1125 if (ifra->ifra_prefixmask.sin6_len != 0) { 1126 ia->ia_prefixmask.sin6_family = AF_INET6; 1127 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1128 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1129 } 1130 1131 ia->ia_ifp = ifp; 1132 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1133 IF_ADDR_WLOCK(ifp); 1134 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1135 IF_ADDR_WUNLOCK(ifp); 1136 1137 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1138 IN6_IFADDR_WLOCK(); 1139 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1140 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1141 IN6_IFADDR_WUNLOCK(); 1142 1143 return (ia); 1144 } 1145 1146 /* 1147 * Update/configure interface address parameters: 1148 * 1149 * 1) Update lifetime 1150 * 2) Update interface metric ad flags 1151 * 3) Notify other subsystems 1152 */ 1153 static int 1154 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1155 struct in6_ifaddr *ia, int hostIsNew, int flags) 1156 { 1157 int error; 1158 1159 /* update timestamp */ 1160 ia->ia6_updatetime = time_uptime; 1161 1162 /* 1163 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1164 * to see if the address is deprecated or invalidated, but initialize 1165 * these members for applications. 1166 */ 1167 ia->ia6_lifetime = ifra->ifra_lifetime; 1168 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1169 ia->ia6_lifetime.ia6t_expire = 1170 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1171 } else 1172 ia->ia6_lifetime.ia6t_expire = 0; 1173 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1174 ia->ia6_lifetime.ia6t_preferred = 1175 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1176 } else 1177 ia->ia6_lifetime.ia6t_preferred = 0; 1178 1179 /* 1180 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1181 * userland, make it deprecated. 1182 */ 1183 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1184 ia->ia6_lifetime.ia6t_pltime = 0; 1185 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1186 } 1187 1188 /* 1189 * configure address flags. 1190 */ 1191 ia->ia6_flags = ifra->ifra_flags; 1192 1193 /* 1194 * Make the address tentative before joining multicast addresses, 1195 * so that corresponding MLD responses would not have a tentative 1196 * source address. 1197 */ 1198 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1199 1200 /* 1201 * DAD should be performed for an new address or addresses on 1202 * an interface with ND6_IFF_IFDISABLED. 1203 */ 1204 if (in6if_do_dad(ifp) && 1205 (hostIsNew || (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED))) 1206 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1207 1208 /* notify other subsystems */ 1209 error = in6_notify_ifa(ifp, ia, ifra, hostIsNew); 1210 1211 return (error); 1212 } 1213 1214 /* 1215 * Do link-level ifa job: 1216 * 1) Add lle entry for added address 1217 * 2) Notifies routing socket users about new address 1218 * 3) join appropriate multicast group 1219 * 4) start DAD if enabled 1220 */ 1221 static int 1222 in6_broadcast_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1223 struct in6_ifaddr *ia, int flags) 1224 { 1225 struct in6_multi *in6m_sol; 1226 int error = 0; 1227 1228 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1229 if ((error = nd6_add_ifa_lle(ia)) != 0) { 1230 in6_purgeaddr(&ia->ia_ifa); 1231 ifa_free(&ia->ia_ifa); 1232 return (error); 1233 } 1234 1235 /* Join necessary multicast groups. */ 1236 in6m_sol = NULL; 1237 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1238 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1239 if (error != 0) { 1240 in6_purgeaddr(&ia->ia_ifa); 1241 ifa_free(&ia->ia_ifa); 1242 return (error); 1243 } 1244 } 1245 1246 /* Perform DAD, if the address is TENTATIVE. */ 1247 if ((ia->ia6_flags & IN6_IFF_TENTATIVE)) { 1248 int delay, mindelay, maxdelay; 1249 1250 delay = 0; 1251 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1252 /* 1253 * We need to impose a delay before sending an NS 1254 * for DAD. Check if we also needed a delay for the 1255 * corresponding MLD message. If we did, the delay 1256 * should be larger than the MLD delay (this could be 1257 * relaxed a bit, but this simple logic is at least 1258 * safe). 1259 * XXX: Break data hiding guidelines and look at 1260 * state for the solicited multicast group. 1261 */ 1262 mindelay = 0; 1263 if (in6m_sol != NULL && 1264 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1265 mindelay = in6m_sol->in6m_timer; 1266 } 1267 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1268 if (maxdelay - mindelay == 0) 1269 delay = 0; 1270 else { 1271 delay = 1272 (arc4random() % (maxdelay - mindelay)) + 1273 mindelay; 1274 } 1275 } 1276 nd6_dad_start((struct ifaddr *)ia, delay); 1277 } 1278 1279 in6_newaddrmsg(ia, RTM_ADD); 1280 ifa_free(&ia->ia_ifa); 1281 return (error); 1282 } 1283 1284 void 1285 in6_purgeaddr(struct ifaddr *ifa) 1286 { 1287 struct ifnet *ifp = ifa->ifa_ifp; 1288 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1289 struct in6_multi_mship *imm; 1290 int plen, error; 1291 1292 if (ifa->ifa_carp) 1293 (*carp_detach_p)(ifa); 1294 1295 /* 1296 * Remove the loopback route to the interface address. 1297 * The check for the current setting of "nd6_useloopback" 1298 * is not needed. 1299 */ 1300 if (ia->ia_flags & IFA_RTSELF) { 1301 error = ifa_del_loopback_route((struct ifaddr *)ia, 1302 (struct sockaddr *)&ia->ia_addr); 1303 if (error == 0) 1304 ia->ia_flags &= ~IFA_RTSELF; 1305 } 1306 1307 /* stop DAD processing */ 1308 nd6_dad_stop(ifa); 1309 1310 /* Leave multicast groups. */ 1311 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1312 LIST_REMOVE(imm, i6mm_chain); 1313 in6_leavegroup(imm); 1314 } 1315 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1316 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1317 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1318 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0); 1319 if (error != 0) 1320 log(LOG_INFO, "%s: err=%d, destination address delete " 1321 "failed\n", __func__, error); 1322 ia->ia_flags &= ~IFA_ROUTE; 1323 } 1324 1325 in6_newaddrmsg(ia, RTM_DELETE); 1326 in6_unlink_ifa(ia, ifp); 1327 } 1328 1329 static void 1330 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1331 { 1332 char ip6buf[INET6_ADDRSTRLEN]; 1333 int remove_lle; 1334 1335 IF_ADDR_WLOCK(ifp); 1336 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1337 IF_ADDR_WUNLOCK(ifp); 1338 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1339 1340 /* 1341 * Defer the release of what might be the last reference to the 1342 * in6_ifaddr so that it can't be freed before the remainder of the 1343 * cleanup. 1344 */ 1345 IN6_IFADDR_WLOCK(); 1346 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1347 LIST_REMOVE(ia, ia6_hash); 1348 IN6_IFADDR_WUNLOCK(); 1349 1350 /* 1351 * Release the reference to the base prefix. There should be a 1352 * positive reference. 1353 */ 1354 remove_lle = 0; 1355 if (ia->ia6_ndpr == NULL) { 1356 nd6log((LOG_NOTICE, 1357 "in6_unlink_ifa: autoconf'ed address " 1358 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1359 } else { 1360 ia->ia6_ndpr->ndpr_refcnt--; 1361 /* Do not delete lles within prefix if refcont != 0 */ 1362 if (ia->ia6_ndpr->ndpr_refcnt == 0) 1363 remove_lle = 1; 1364 ia->ia6_ndpr = NULL; 1365 } 1366 1367 nd6_rem_ifa_lle(ia, remove_lle); 1368 1369 /* 1370 * Also, if the address being removed is autoconf'ed, call 1371 * pfxlist_onlink_check() since the release might affect the status of 1372 * other (detached) addresses. 1373 */ 1374 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1375 pfxlist_onlink_check(); 1376 } 1377 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1378 } 1379 1380 /* 1381 * Notifies other subsystems about address change/arrival: 1382 * 1) Notifies device handler on the first IPv6 address assignment 1383 * 2) Handle routing table changes for P2P links and route 1384 * 3) Handle routing table changes for address host route 1385 */ 1386 static int 1387 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1388 struct in6_aliasreq *ifra, int hostIsNew) 1389 { 1390 int error = 0, plen, ifacount = 0; 1391 struct ifaddr *ifa; 1392 struct sockaddr_in6 *pdst; 1393 char ip6buf[INET6_ADDRSTRLEN]; 1394 1395 /* 1396 * Give the interface a chance to initialize 1397 * if this is its first address, 1398 */ 1399 if (hostIsNew != 0) { 1400 IF_ADDR_RLOCK(ifp); 1401 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1402 if (ifa->ifa_addr->sa_family != AF_INET6) 1403 continue; 1404 ifacount++; 1405 } 1406 IF_ADDR_RUNLOCK(ifp); 1407 } 1408 1409 if (ifacount <= 1 && ifp->if_ioctl) { 1410 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1411 if (error) 1412 return (error); 1413 } 1414 1415 /* 1416 * If a new destination address is specified, scrub the old one and 1417 * install the new destination. Note that the interface must be 1418 * p2p or loopback. 1419 */ 1420 pdst = &ifra->ifra_dstaddr; 1421 if (pdst->sin6_family == AF_INET6 && 1422 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1423 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1424 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1425 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1426 "remove a route to the old destination: %s\n", 1427 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1428 /* proceed anyway... */ 1429 } else 1430 ia->ia_flags &= ~IFA_ROUTE; 1431 ia->ia_dstaddr = *pdst; 1432 } 1433 1434 /* 1435 * If a new destination address is specified for a point-to-point 1436 * interface, install a route to the destination as an interface 1437 * direct route. 1438 * XXX: the logic below rejects assigning multiple addresses on a p2p 1439 * interface that share the same destination. 1440 */ 1441 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1442 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1443 ia->ia_dstaddr.sin6_family == AF_INET6) { 1444 int rtflags = RTF_UP | RTF_HOST; 1445 /* 1446 * Handle the case for ::1 . 1447 */ 1448 if (ifp->if_flags & IFF_LOOPBACK) 1449 ia->ia_flags |= IFA_RTSELF; 1450 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1451 if (error) 1452 return (error); 1453 ia->ia_flags |= IFA_ROUTE; 1454 } 1455 1456 /* 1457 * add a loopback route to self if not exists 1458 */ 1459 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1460 error = ifa_add_loopback_route((struct ifaddr *)ia, 1461 (struct sockaddr *)&ia->ia_addr); 1462 if (error == 0) 1463 ia->ia_flags |= IFA_RTSELF; 1464 } 1465 1466 return (error); 1467 } 1468 1469 /* 1470 * Find an IPv6 interface link-local address specific to an interface. 1471 * ifaddr is returned referenced. 1472 */ 1473 struct in6_ifaddr * 1474 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1475 { 1476 struct ifaddr *ifa; 1477 1478 IF_ADDR_RLOCK(ifp); 1479 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1480 if (ifa->ifa_addr->sa_family != AF_INET6) 1481 continue; 1482 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1483 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1484 ignoreflags) != 0) 1485 continue; 1486 ifa_ref(ifa); 1487 break; 1488 } 1489 } 1490 IF_ADDR_RUNLOCK(ifp); 1491 1492 return ((struct in6_ifaddr *)ifa); 1493 } 1494 1495 1496 /* 1497 * find the internet address corresponding to a given address. 1498 * ifaddr is returned referenced. 1499 */ 1500 struct in6_ifaddr * 1501 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1502 { 1503 struct rm_priotracker in6_ifa_tracker; 1504 struct in6_ifaddr *ia; 1505 1506 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1507 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1508 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1509 if (zoneid != 0 && 1510 zoneid != ia->ia_addr.sin6_scope_id) 1511 continue; 1512 ifa_ref(&ia->ia_ifa); 1513 break; 1514 } 1515 } 1516 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1517 return (ia); 1518 } 1519 1520 /* 1521 * find the internet address corresponding to a given interface and address. 1522 * ifaddr is returned referenced. 1523 */ 1524 struct in6_ifaddr * 1525 in6ifa_ifpwithaddr(struct ifnet *ifp, const struct in6_addr *addr) 1526 { 1527 struct ifaddr *ifa; 1528 1529 IF_ADDR_RLOCK(ifp); 1530 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1531 if (ifa->ifa_addr->sa_family != AF_INET6) 1532 continue; 1533 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1534 ifa_ref(ifa); 1535 break; 1536 } 1537 } 1538 IF_ADDR_RUNLOCK(ifp); 1539 1540 return ((struct in6_ifaddr *)ifa); 1541 } 1542 1543 /* 1544 * Find a link-local scoped address on ifp and return it if any. 1545 */ 1546 struct in6_ifaddr * 1547 in6ifa_llaonifp(struct ifnet *ifp) 1548 { 1549 struct sockaddr_in6 *sin6; 1550 struct ifaddr *ifa; 1551 1552 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1553 return (NULL); 1554 if_addr_rlock(ifp); 1555 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1556 if (ifa->ifa_addr->sa_family != AF_INET6) 1557 continue; 1558 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1559 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1560 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1561 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1562 break; 1563 } 1564 if_addr_runlock(ifp); 1565 1566 return ((struct in6_ifaddr *)ifa); 1567 } 1568 1569 /* 1570 * Convert IP6 address to printable (loggable) representation. Caller 1571 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1572 */ 1573 static char digits[] = "0123456789abcdef"; 1574 char * 1575 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1576 { 1577 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1578 char *cp; 1579 const u_int16_t *a = (const u_int16_t *)addr; 1580 const u_int8_t *d; 1581 int dcolon = 0, zero = 0; 1582 1583 cp = ip6buf; 1584 1585 for (i = 0; i < 8; i++) { 1586 if (*(a + i) == 0) { 1587 cnt++; 1588 if (cnt == 1) 1589 idx = i; 1590 } 1591 else if (maxcnt < cnt) { 1592 maxcnt = cnt; 1593 index = idx; 1594 cnt = 0; 1595 } 1596 } 1597 if (maxcnt < cnt) { 1598 maxcnt = cnt; 1599 index = idx; 1600 } 1601 1602 for (i = 0; i < 8; i++) { 1603 if (dcolon == 1) { 1604 if (*a == 0) { 1605 if (i == 7) 1606 *cp++ = ':'; 1607 a++; 1608 continue; 1609 } else 1610 dcolon = 2; 1611 } 1612 if (*a == 0) { 1613 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1614 if (i == 0) 1615 *cp++ = ':'; 1616 *cp++ = ':'; 1617 dcolon = 1; 1618 } else { 1619 *cp++ = '0'; 1620 *cp++ = ':'; 1621 } 1622 a++; 1623 continue; 1624 } 1625 d = (const u_char *)a; 1626 /* Try to eliminate leading zeros in printout like in :0001. */ 1627 zero = 1; 1628 *cp = digits[*d >> 4]; 1629 if (*cp != '0') { 1630 zero = 0; 1631 cp++; 1632 } 1633 *cp = digits[*d++ & 0xf]; 1634 if (zero == 0 || (*cp != '0')) { 1635 zero = 0; 1636 cp++; 1637 } 1638 *cp = digits[*d >> 4]; 1639 if (zero == 0 || (*cp != '0')) { 1640 zero = 0; 1641 cp++; 1642 } 1643 *cp++ = digits[*d & 0xf]; 1644 *cp++ = ':'; 1645 a++; 1646 } 1647 *--cp = '\0'; 1648 return (ip6buf); 1649 } 1650 1651 int 1652 in6_localaddr(struct in6_addr *in6) 1653 { 1654 struct rm_priotracker in6_ifa_tracker; 1655 struct in6_ifaddr *ia; 1656 1657 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1658 return 1; 1659 1660 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1661 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1662 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1663 &ia->ia_prefixmask.sin6_addr)) { 1664 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1665 return 1; 1666 } 1667 } 1668 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1669 1670 return (0); 1671 } 1672 1673 /* 1674 * Return 1 if an internet address is for the local host and configured 1675 * on one of its interfaces. 1676 */ 1677 int 1678 in6_localip(struct in6_addr *in6) 1679 { 1680 struct rm_priotracker in6_ifa_tracker; 1681 struct in6_ifaddr *ia; 1682 1683 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1684 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1685 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1686 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1687 return (1); 1688 } 1689 } 1690 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1691 return (0); 1692 } 1693 1694 /* 1695 * Return 1 if an internet address is configured on an interface. 1696 */ 1697 int 1698 in6_ifhasaddr(struct ifnet *ifp, struct in6_addr *addr) 1699 { 1700 struct in6_addr in6; 1701 struct ifaddr *ifa; 1702 struct in6_ifaddr *ia6; 1703 1704 in6 = *addr; 1705 if (in6_clearscope(&in6)) 1706 return (0); 1707 in6_setscope(&in6, ifp, NULL); 1708 1709 IF_ADDR_RLOCK(ifp); 1710 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1711 if (ifa->ifa_addr->sa_family != AF_INET6) 1712 continue; 1713 ia6 = (struct in6_ifaddr *)ifa; 1714 if (IN6_ARE_ADDR_EQUAL(&ia6->ia_addr.sin6_addr, &in6)) { 1715 IF_ADDR_RUNLOCK(ifp); 1716 return (1); 1717 } 1718 } 1719 IF_ADDR_RUNLOCK(ifp); 1720 1721 return (0); 1722 } 1723 1724 int 1725 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1726 { 1727 struct rm_priotracker in6_ifa_tracker; 1728 struct in6_ifaddr *ia; 1729 1730 IN6_IFADDR_RLOCK(&in6_ifa_tracker); 1731 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1732 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1733 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1734 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1735 return (1); /* true */ 1736 } 1737 break; 1738 } 1739 } 1740 IN6_IFADDR_RUNLOCK(&in6_ifa_tracker); 1741 1742 return (0); /* false */ 1743 } 1744 1745 /* 1746 * return length of part which dst and src are equal 1747 * hard coding... 1748 */ 1749 int 1750 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1751 { 1752 int match = 0; 1753 u_char *s = (u_char *)src, *d = (u_char *)dst; 1754 u_char *lim = s + 16, r; 1755 1756 while (s < lim) 1757 if ((r = (*d++ ^ *s++)) != 0) { 1758 while (r < 128) { 1759 match++; 1760 r <<= 1; 1761 } 1762 break; 1763 } else 1764 match += 8; 1765 return match; 1766 } 1767 1768 /* XXX: to be scope conscious */ 1769 int 1770 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1771 { 1772 int bytelen, bitlen; 1773 1774 /* sanity check */ 1775 if (0 > len || len > 128) { 1776 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1777 len); 1778 return (0); 1779 } 1780 1781 bytelen = len / 8; 1782 bitlen = len % 8; 1783 1784 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1785 return (0); 1786 if (bitlen != 0 && 1787 p1->s6_addr[bytelen] >> (8 - bitlen) != 1788 p2->s6_addr[bytelen] >> (8 - bitlen)) 1789 return (0); 1790 1791 return (1); 1792 } 1793 1794 void 1795 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1796 { 1797 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1798 int bytelen, bitlen, i; 1799 1800 /* sanity check */ 1801 if (0 > len || len > 128) { 1802 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1803 len); 1804 return; 1805 } 1806 1807 bzero(maskp, sizeof(*maskp)); 1808 bytelen = len / 8; 1809 bitlen = len % 8; 1810 for (i = 0; i < bytelen; i++) 1811 maskp->s6_addr[i] = 0xff; 1812 if (bitlen) 1813 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1814 } 1815 1816 /* 1817 * return the best address out of the same scope. if no address was 1818 * found, return the first valid address from designated IF. 1819 */ 1820 struct in6_ifaddr * 1821 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1822 { 1823 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1824 struct ifaddr *ifa; 1825 struct in6_ifaddr *besta = 0; 1826 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1827 1828 dep[0] = dep[1] = NULL; 1829 1830 /* 1831 * We first look for addresses in the same scope. 1832 * If there is one, return it. 1833 * If two or more, return one which matches the dst longest. 1834 * If none, return one of global addresses assigned other ifs. 1835 */ 1836 IF_ADDR_RLOCK(ifp); 1837 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1838 if (ifa->ifa_addr->sa_family != AF_INET6) 1839 continue; 1840 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1841 continue; /* XXX: is there any case to allow anycast? */ 1842 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1843 continue; /* don't use this interface */ 1844 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1845 continue; 1846 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1847 if (V_ip6_use_deprecated) 1848 dep[0] = (struct in6_ifaddr *)ifa; 1849 continue; 1850 } 1851 1852 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1853 /* 1854 * call in6_matchlen() as few as possible 1855 */ 1856 if (besta) { 1857 if (blen == -1) 1858 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1859 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1860 if (tlen > blen) { 1861 blen = tlen; 1862 besta = (struct in6_ifaddr *)ifa; 1863 } 1864 } else 1865 besta = (struct in6_ifaddr *)ifa; 1866 } 1867 } 1868 if (besta) { 1869 ifa_ref(&besta->ia_ifa); 1870 IF_ADDR_RUNLOCK(ifp); 1871 return (besta); 1872 } 1873 1874 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1875 if (ifa->ifa_addr->sa_family != AF_INET6) 1876 continue; 1877 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1878 continue; /* XXX: is there any case to allow anycast? */ 1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1880 continue; /* don't use this interface */ 1881 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1882 continue; 1883 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1884 if (V_ip6_use_deprecated) 1885 dep[1] = (struct in6_ifaddr *)ifa; 1886 continue; 1887 } 1888 1889 if (ifa != NULL) 1890 ifa_ref(ifa); 1891 IF_ADDR_RUNLOCK(ifp); 1892 return (struct in6_ifaddr *)ifa; 1893 } 1894 1895 /* use the last-resort values, that are, deprecated addresses */ 1896 if (dep[0]) { 1897 ifa_ref((struct ifaddr *)dep[0]); 1898 IF_ADDR_RUNLOCK(ifp); 1899 return dep[0]; 1900 } 1901 if (dep[1]) { 1902 ifa_ref((struct ifaddr *)dep[1]); 1903 IF_ADDR_RUNLOCK(ifp); 1904 return dep[1]; 1905 } 1906 1907 IF_ADDR_RUNLOCK(ifp); 1908 return NULL; 1909 } 1910 1911 /* 1912 * perform DAD when interface becomes IFF_UP. 1913 */ 1914 void 1915 in6_if_up(struct ifnet *ifp) 1916 { 1917 struct ifaddr *ifa; 1918 struct in6_ifaddr *ia; 1919 1920 IF_ADDR_RLOCK(ifp); 1921 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1922 if (ifa->ifa_addr->sa_family != AF_INET6) 1923 continue; 1924 ia = (struct in6_ifaddr *)ifa; 1925 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1926 /* 1927 * The TENTATIVE flag was likely set by hand 1928 * beforehand, implicitly indicating the need for DAD. 1929 * We may be able to skip the random delay in this 1930 * case, but we impose delays just in case. 1931 */ 1932 nd6_dad_start(ifa, 1933 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1934 } 1935 } 1936 IF_ADDR_RUNLOCK(ifp); 1937 1938 /* 1939 * special cases, like 6to4, are handled in in6_ifattach 1940 */ 1941 in6_ifattach(ifp, NULL); 1942 } 1943 1944 int 1945 in6if_do_dad(struct ifnet *ifp) 1946 { 1947 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1948 return (0); 1949 1950 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 1951 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 1952 return (0); 1953 1954 /* 1955 * Our DAD routine requires the interface up and running. 1956 * However, some interfaces can be up before the RUNNING 1957 * status. Additionaly, users may try to assign addresses 1958 * before the interface becomes up (or running). 1959 * This function returns EAGAIN in that case. 1960 * The caller should mark "tentative" on the address instead of 1961 * performing DAD immediately. 1962 */ 1963 if (!((ifp->if_flags & IFF_UP) && 1964 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1965 return (EAGAIN); 1966 1967 return (1); 1968 } 1969 1970 /* 1971 * Calculate max IPv6 MTU through all the interfaces and store it 1972 * to in6_maxmtu. 1973 */ 1974 void 1975 in6_setmaxmtu(void) 1976 { 1977 unsigned long maxmtu = 0; 1978 struct ifnet *ifp; 1979 1980 IFNET_RLOCK_NOSLEEP(); 1981 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1982 /* this function can be called during ifnet initialization */ 1983 if (!ifp->if_afdata[AF_INET6]) 1984 continue; 1985 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1986 IN6_LINKMTU(ifp) > maxmtu) 1987 maxmtu = IN6_LINKMTU(ifp); 1988 } 1989 IFNET_RUNLOCK_NOSLEEP(); 1990 if (maxmtu) /* update only when maxmtu is positive */ 1991 V_in6_maxmtu = maxmtu; 1992 } 1993 1994 /* 1995 * Provide the length of interface identifiers to be used for the link attached 1996 * to the given interface. The length should be defined in "IPv6 over 1997 * xxx-link" document. Note that address architecture might also define 1998 * the length for a particular set of address prefixes, regardless of the 1999 * link type. As clarified in rfc2462bis, those two definitions should be 2000 * consistent, and those really are as of August 2004. 2001 */ 2002 int 2003 in6_if2idlen(struct ifnet *ifp) 2004 { 2005 switch (ifp->if_type) { 2006 case IFT_ETHER: /* RFC2464 */ 2007 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2008 case IFT_L2VLAN: /* ditto */ 2009 case IFT_IEEE80211: /* ditto */ 2010 case IFT_INFINIBAND: 2011 return (64); 2012 case IFT_FDDI: /* RFC2467 */ 2013 return (64); 2014 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2015 return (64); 2016 case IFT_PPP: /* RFC2472 */ 2017 return (64); 2018 case IFT_ARCNET: /* RFC2497 */ 2019 return (64); 2020 case IFT_FRELAY: /* RFC2590 */ 2021 return (64); 2022 case IFT_IEEE1394: /* RFC3146 */ 2023 return (64); 2024 case IFT_GIF: 2025 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2026 case IFT_LOOP: 2027 return (64); /* XXX: is this really correct? */ 2028 default: 2029 /* 2030 * Unknown link type: 2031 * It might be controversial to use the today's common constant 2032 * of 64 for these cases unconditionally. For full compliance, 2033 * we should return an error in this case. On the other hand, 2034 * if we simply miss the standard for the link type or a new 2035 * standard is defined for a new link type, the IFID length 2036 * is very likely to be the common constant. As a compromise, 2037 * we always use the constant, but make an explicit notice 2038 * indicating the "unknown" case. 2039 */ 2040 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2041 return (64); 2042 } 2043 } 2044 2045 #include <sys/sysctl.h> 2046 2047 struct in6_llentry { 2048 struct llentry base; 2049 }; 2050 2051 #define IN6_LLTBL_DEFAULT_HSIZE 32 2052 #define IN6_LLTBL_HASH(k, h) \ 2053 (((((((k >> 8) ^ k) >> 8) ^ k) >> 8) ^ k) & ((h) - 1)) 2054 2055 /* 2056 * Do actual deallocation of @lle. 2057 * Called by LLE_FREE_LOCKED when number of references 2058 * drops to zero. 2059 */ 2060 static void 2061 in6_lltable_destroy_lle(struct llentry *lle) 2062 { 2063 2064 LLE_WUNLOCK(lle); 2065 LLE_LOCK_DESTROY(lle); 2066 free(lle, M_LLTABLE); 2067 } 2068 2069 static struct llentry * 2070 in6_lltable_new(const struct in6_addr *addr6, u_int flags) 2071 { 2072 struct in6_llentry *lle; 2073 2074 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2075 if (lle == NULL) /* NB: caller generates msg */ 2076 return NULL; 2077 2078 lle->base.r_l3addr.addr6 = *addr6; 2079 lle->base.lle_refcnt = 1; 2080 lle->base.lle_free = in6_lltable_destroy_lle; 2081 LLE_LOCK_INIT(&lle->base); 2082 callout_init(&lle->base.lle_timer, 1); 2083 2084 return (&lle->base); 2085 } 2086 2087 static int 2088 in6_lltable_match_prefix(const struct sockaddr *saddr, 2089 const struct sockaddr *smask, u_int flags, struct llentry *lle) 2090 { 2091 const struct in6_addr *addr, *mask, *lle_addr; 2092 2093 addr = &((const struct sockaddr_in6 *)saddr)->sin6_addr; 2094 mask = &((const struct sockaddr_in6 *)smask)->sin6_addr; 2095 lle_addr = &lle->r_l3addr.addr6; 2096 2097 if (IN6_ARE_MASKED_ADDR_EQUAL(lle_addr, addr, mask) == 0) 2098 return (0); 2099 2100 if (lle->la_flags & LLE_IFADDR) { 2101 2102 /* 2103 * Delete LLE_IFADDR records IFF address & flag matches. 2104 * Note that addr is the interface address within prefix 2105 * being matched. 2106 */ 2107 if (IN6_ARE_ADDR_EQUAL(addr, lle_addr) && 2108 (flags & LLE_STATIC) != 0) 2109 return (1); 2110 return (0); 2111 } 2112 2113 /* flags & LLE_STATIC means deleting both dynamic and static entries */ 2114 if ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC)) 2115 return (1); 2116 2117 return (0); 2118 } 2119 2120 static void 2121 in6_lltable_free_entry(struct lltable *llt, struct llentry *lle) 2122 { 2123 struct ifnet *ifp; 2124 2125 LLE_WLOCK_ASSERT(lle); 2126 KASSERT(llt != NULL, ("lltable is NULL")); 2127 2128 /* Unlink entry from table */ 2129 if ((lle->la_flags & LLE_LINKED) != 0) { 2130 2131 ifp = llt->llt_ifp; 2132 IF_AFDATA_WLOCK_ASSERT(ifp); 2133 lltable_unlink_entry(llt, lle); 2134 } 2135 2136 if (callout_stop(&lle->lle_timer) > 0) 2137 LLE_REMREF(lle); 2138 2139 llentry_free(lle); 2140 } 2141 2142 static int 2143 in6_lltable_rtcheck(struct ifnet *ifp, 2144 u_int flags, 2145 const struct sockaddr *l3addr) 2146 { 2147 struct rtentry *rt; 2148 char ip6buf[INET6_ADDRSTRLEN]; 2149 2150 KASSERT(l3addr->sa_family == AF_INET6, 2151 ("sin_family %d", l3addr->sa_family)); 2152 2153 /* Our local addresses are always only installed on the default FIB. */ 2154 /* XXX rtalloc1 should take a const param */ 2155 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0, 2156 RT_DEFAULT_FIB); 2157 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2158 struct ifaddr *ifa; 2159 /* 2160 * Create an ND6 cache for an IPv6 neighbor 2161 * that is not covered by our own prefix. 2162 */ 2163 ifa = ifaof_ifpforaddr(l3addr, ifp); 2164 if (ifa != NULL) { 2165 ifa_free(ifa); 2166 if (rt != NULL) 2167 RTFREE_LOCKED(rt); 2168 return 0; 2169 } 2170 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2171 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2172 if (rt != NULL) 2173 RTFREE_LOCKED(rt); 2174 return EINVAL; 2175 } 2176 RTFREE_LOCKED(rt); 2177 return 0; 2178 } 2179 2180 static inline uint32_t 2181 in6_lltable_hash_dst(const struct in6_addr *dst, uint32_t hsize) 2182 { 2183 2184 return (IN6_LLTBL_HASH(dst->s6_addr32[3], hsize)); 2185 } 2186 2187 static uint32_t 2188 in6_lltable_hash(const struct llentry *lle, uint32_t hsize) 2189 { 2190 2191 return (in6_lltable_hash_dst(&lle->r_l3addr.addr6, hsize)); 2192 } 2193 2194 static void 2195 in6_lltable_fill_sa_entry(const struct llentry *lle, struct sockaddr *sa) 2196 { 2197 struct sockaddr_in6 *sin6; 2198 2199 sin6 = (struct sockaddr_in6 *)sa; 2200 bzero(sin6, sizeof(*sin6)); 2201 sin6->sin6_family = AF_INET6; 2202 sin6->sin6_len = sizeof(*sin6); 2203 sin6->sin6_addr = lle->r_l3addr.addr6; 2204 } 2205 2206 static inline struct llentry * 2207 in6_lltable_find_dst(struct lltable *llt, const struct in6_addr *dst) 2208 { 2209 struct llentry *lle; 2210 struct llentries *lleh; 2211 u_int hashidx; 2212 2213 hashidx = in6_lltable_hash_dst(dst, llt->llt_hsize); 2214 lleh = &llt->lle_head[hashidx]; 2215 LIST_FOREACH(lle, lleh, lle_next) { 2216 if (lle->la_flags & LLE_DELETED) 2217 continue; 2218 if (IN6_ARE_ADDR_EQUAL(&lle->r_l3addr.addr6, dst)) 2219 break; 2220 } 2221 2222 return (lle); 2223 } 2224 2225 static void 2226 in6_lltable_delete_entry(struct lltable *llt, struct llentry *lle) 2227 { 2228 2229 lle->la_flags |= LLE_DELETED; 2230 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 2231 #ifdef DIAGNOSTIC 2232 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2233 #endif 2234 llentry_free(lle); 2235 } 2236 2237 static struct llentry * 2238 in6_lltable_alloc(struct lltable *llt, u_int flags, 2239 const struct sockaddr *l3addr) 2240 { 2241 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2242 struct ifnet *ifp = llt->llt_ifp; 2243 struct llentry *lle; 2244 2245 KASSERT(l3addr->sa_family == AF_INET6, 2246 ("sin_family %d", l3addr->sa_family)); 2247 2248 /* 2249 * A route that covers the given address must have 2250 * been installed 1st because we are doing a resolution, 2251 * verify this. 2252 */ 2253 if (!(flags & LLE_IFADDR) && 2254 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2255 return (NULL); 2256 2257 lle = in6_lltable_new(&sin6->sin6_addr, flags); 2258 if (lle == NULL) { 2259 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2260 return (NULL); 2261 } 2262 lle->la_flags = flags; 2263 if ((flags & LLE_IFADDR) == LLE_IFADDR) { 2264 lltable_set_entry_addr(ifp, lle, IF_LLADDR(ifp)); 2265 lle->la_flags |= LLE_STATIC; 2266 } 2267 2268 if ((lle->la_flags & LLE_STATIC) != 0) 2269 lle->ln_state = ND6_LLINFO_REACHABLE; 2270 2271 return (lle); 2272 } 2273 2274 static struct llentry * 2275 in6_lltable_lookup(struct lltable *llt, u_int flags, 2276 const struct sockaddr *l3addr) 2277 { 2278 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2279 struct llentry *lle; 2280 2281 IF_AFDATA_LOCK_ASSERT(llt->llt_ifp); 2282 KASSERT(l3addr->sa_family == AF_INET6, 2283 ("sin_family %d", l3addr->sa_family)); 2284 2285 lle = in6_lltable_find_dst(llt, &sin6->sin6_addr); 2286 2287 if (lle == NULL) 2288 return (NULL); 2289 2290 if (flags & LLE_EXCLUSIVE) 2291 LLE_WLOCK(lle); 2292 else 2293 LLE_RLOCK(lle); 2294 return (lle); 2295 } 2296 2297 static int 2298 in6_lltable_dump_entry(struct lltable *llt, struct llentry *lle, 2299 struct sysctl_req *wr) 2300 { 2301 struct ifnet *ifp = llt->llt_ifp; 2302 /* XXX stack use */ 2303 struct { 2304 struct rt_msghdr rtm; 2305 struct sockaddr_in6 sin6; 2306 /* 2307 * ndp.c assumes that sdl is word aligned 2308 */ 2309 #ifdef __LP64__ 2310 uint32_t pad; 2311 #endif 2312 struct sockaddr_dl sdl; 2313 } ndpc; 2314 struct sockaddr_dl *sdl; 2315 int error; 2316 2317 bzero(&ndpc, sizeof(ndpc)); 2318 /* skip deleted entries */ 2319 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 2320 return (0); 2321 /* Skip if jailed and not a valid IP of the prison. */ 2322 lltable_fill_sa_entry(lle, 2323 (struct sockaddr *)&ndpc.sin6); 2324 if (prison_if(wr->td->td_ucred, 2325 (struct sockaddr *)&ndpc.sin6) != 0) 2326 return (0); 2327 /* 2328 * produce a msg made of: 2329 * struct rt_msghdr; 2330 * struct sockaddr_in6 (IPv6) 2331 * struct sockaddr_dl; 2332 */ 2333 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2334 ndpc.rtm.rtm_version = RTM_VERSION; 2335 ndpc.rtm.rtm_type = RTM_GET; 2336 ndpc.rtm.rtm_flags = RTF_UP; 2337 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2338 if (V_deembed_scopeid) 2339 sa6_recoverscope(&ndpc.sin6); 2340 2341 /* publish */ 2342 if (lle->la_flags & LLE_PUB) 2343 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2344 2345 sdl = &ndpc.sdl; 2346 sdl->sdl_family = AF_LINK; 2347 sdl->sdl_len = sizeof(*sdl); 2348 sdl->sdl_alen = ifp->if_addrlen; 2349 sdl->sdl_index = ifp->if_index; 2350 sdl->sdl_type = ifp->if_type; 2351 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2352 ndpc.rtm.rtm_rmx.rmx_expire = 2353 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2354 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2355 if (lle->la_flags & LLE_STATIC) 2356 ndpc.rtm.rtm_flags |= RTF_STATIC; 2357 if (lle->la_flags & LLE_IFADDR) 2358 ndpc.rtm.rtm_flags |= RTF_PINNED; 2359 ndpc.rtm.rtm_index = ifp->if_index; 2360 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2361 2362 return (error); 2363 } 2364 2365 static struct lltable * 2366 in6_lltattach(struct ifnet *ifp) 2367 { 2368 struct lltable *llt; 2369 2370 llt = lltable_allocate_htbl(IN6_LLTBL_DEFAULT_HSIZE); 2371 llt->llt_af = AF_INET6; 2372 llt->llt_ifp = ifp; 2373 2374 llt->llt_lookup = in6_lltable_lookup; 2375 llt->llt_alloc_entry = in6_lltable_alloc; 2376 llt->llt_delete_entry = in6_lltable_delete_entry; 2377 llt->llt_dump_entry = in6_lltable_dump_entry; 2378 llt->llt_hash = in6_lltable_hash; 2379 llt->llt_fill_sa_entry = in6_lltable_fill_sa_entry; 2380 llt->llt_free_entry = in6_lltable_free_entry; 2381 llt->llt_match_prefix = in6_lltable_match_prefix; 2382 lltable_link(llt); 2383 2384 return (llt); 2385 } 2386 2387 void * 2388 in6_domifattach(struct ifnet *ifp) 2389 { 2390 struct in6_ifextra *ext; 2391 2392 /* There are not IPv6-capable interfaces. */ 2393 switch (ifp->if_type) { 2394 case IFT_PFLOG: 2395 case IFT_PFSYNC: 2396 case IFT_USB: 2397 return (NULL); 2398 } 2399 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2400 bzero(ext, sizeof(*ext)); 2401 2402 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2403 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2404 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2405 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2406 2407 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2408 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2409 M_WAITOK); 2410 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2411 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2412 2413 ext->nd_ifinfo = nd6_ifattach(ifp); 2414 ext->scope6_id = scope6_ifattach(ifp); 2415 ext->lltable = in6_lltattach(ifp); 2416 2417 ext->mld_ifinfo = mld_domifattach(ifp); 2418 2419 return ext; 2420 } 2421 2422 int 2423 in6_domifmtu(struct ifnet *ifp) 2424 { 2425 2426 return (IN6_LINKMTU(ifp)); 2427 } 2428 2429 void 2430 in6_domifdetach(struct ifnet *ifp, void *aux) 2431 { 2432 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2433 2434 mld_domifdetach(ifp); 2435 scope6_ifdetach(ext->scope6_id); 2436 nd6_ifdetach(ext->nd_ifinfo); 2437 lltable_free(ext->lltable); 2438 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2439 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2440 free(ext->in6_ifstat, M_IFADDR); 2441 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2442 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2443 free(ext->icmp6_ifstat, M_IFADDR); 2444 free(ext, M_IFADDR); 2445 } 2446 2447 /* 2448 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2449 * v4 mapped addr or v4 compat addr 2450 */ 2451 void 2452 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2453 { 2454 2455 bzero(sin, sizeof(*sin)); 2456 sin->sin_len = sizeof(struct sockaddr_in); 2457 sin->sin_family = AF_INET; 2458 sin->sin_port = sin6->sin6_port; 2459 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2460 } 2461 2462 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2463 void 2464 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2465 { 2466 bzero(sin6, sizeof(*sin6)); 2467 sin6->sin6_len = sizeof(struct sockaddr_in6); 2468 sin6->sin6_family = AF_INET6; 2469 sin6->sin6_port = sin->sin_port; 2470 sin6->sin6_addr.s6_addr32[0] = 0; 2471 sin6->sin6_addr.s6_addr32[1] = 0; 2472 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2473 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2474 } 2475 2476 /* Convert sockaddr_in6 into sockaddr_in. */ 2477 void 2478 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2479 { 2480 struct sockaddr_in *sin_p; 2481 struct sockaddr_in6 sin6; 2482 2483 /* 2484 * Save original sockaddr_in6 addr and convert it 2485 * to sockaddr_in. 2486 */ 2487 sin6 = *(struct sockaddr_in6 *)nam; 2488 sin_p = (struct sockaddr_in *)nam; 2489 in6_sin6_2_sin(sin_p, &sin6); 2490 } 2491 2492 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2493 void 2494 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2495 { 2496 struct sockaddr_in *sin_p; 2497 struct sockaddr_in6 *sin6_p; 2498 2499 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2500 sin_p = (struct sockaddr_in *)*nam; 2501 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2502 free(*nam, M_SONAME); 2503 *nam = (struct sockaddr *)sin6_p; 2504 } 2505