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 /* FALLTHROUGH */ 328 case SIOCGSCOPE6: 329 case SIOCGSCOPE6DEF: 330 return (scope6_ioctl(cmd, data, ifp)); 331 } 332 333 /* 334 * Find address for this interface, if it exists. 335 * 336 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 337 * only, and used the first interface address as the target of other 338 * operations (without checking ifra_addr). This was because netinet 339 * code/API assumed at most 1 interface address per interface. 340 * Since IPv6 allows a node to assign multiple addresses 341 * on a single interface, we almost always look and check the 342 * presence of ifra_addr, and reject invalid ones here. 343 * It also decreases duplicated code among SIOC*_IN6 operations. 344 */ 345 switch (cmd) { 346 case SIOCAIFADDR_IN6: 347 case SIOCSIFPHYADDR_IN6: 348 sa6 = &ifra->ifra_addr; 349 break; 350 case SIOCSIFADDR_IN6: 351 case SIOCGIFADDR_IN6: 352 case SIOCSIFDSTADDR_IN6: 353 case SIOCSIFNETMASK_IN6: 354 case SIOCGIFDSTADDR_IN6: 355 case SIOCGIFNETMASK_IN6: 356 case SIOCDIFADDR_IN6: 357 case SIOCGIFPSRCADDR_IN6: 358 case SIOCGIFPDSTADDR_IN6: 359 case SIOCGIFAFLAG_IN6: 360 case SIOCSNDFLUSH_IN6: 361 case SIOCSPFXFLUSH_IN6: 362 case SIOCSRTRFLUSH_IN6: 363 case SIOCGIFALIFETIME_IN6: 364 case SIOCSIFALIFETIME_IN6: 365 case SIOCGIFSTAT_IN6: 366 case SIOCGIFSTAT_ICMP6: 367 sa6 = &ifr->ifr_addr; 368 break; 369 case SIOCSIFADDR: 370 case SIOCSIFBRDADDR: 371 case SIOCSIFDSTADDR: 372 case SIOCSIFNETMASK: 373 /* 374 * Although we should pass any non-INET6 ioctl requests 375 * down to driver, we filter some legacy INET requests. 376 * Drivers trust SIOCSIFADDR et al to come from an already 377 * privileged layer, and do not perform any credentials 378 * checks or input validation. 379 */ 380 return (EINVAL); 381 default: 382 sa6 = NULL; 383 break; 384 } 385 if (sa6 && sa6->sin6_family == AF_INET6) { 386 if (sa6->sin6_scope_id != 0) 387 error = sa6_embedscope(sa6, 0); 388 else 389 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 390 if (error != 0) 391 return (error); 392 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 393 &sa6->sin6_addr)) != 0) 394 return (error); 395 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 396 } else 397 ia = NULL; 398 399 switch (cmd) { 400 case SIOCSIFADDR_IN6: 401 case SIOCSIFDSTADDR_IN6: 402 case SIOCSIFNETMASK_IN6: 403 /* 404 * Since IPv6 allows a node to assign multiple addresses 405 * on a single interface, SIOCSIFxxx ioctls are deprecated. 406 */ 407 /* we decided to obsolete this command (20000704) */ 408 error = EINVAL; 409 goto out; 410 411 case SIOCDIFADDR_IN6: 412 /* 413 * for IPv4, we look for existing in_ifaddr here to allow 414 * "ifconfig if0 delete" to remove the first IPv4 address on 415 * the interface. For IPv6, as the spec allows multiple 416 * interface address from the day one, we consider "remove the 417 * first one" semantics to be not preferable. 418 */ 419 if (ia == NULL) { 420 error = EADDRNOTAVAIL; 421 goto out; 422 } 423 /* FALLTHROUGH */ 424 case SIOCAIFADDR_IN6: 425 /* 426 * We always require users to specify a valid IPv6 address for 427 * the corresponding operation. 428 */ 429 if (ifra->ifra_addr.sin6_family != AF_INET6 || 430 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 431 error = EAFNOSUPPORT; 432 goto out; 433 } 434 435 if (td != NULL) { 436 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 437 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 438 if (error) 439 goto out; 440 } 441 /* FALLTHROUGH */ 442 case SIOCGIFSTAT_IN6: 443 case SIOCGIFSTAT_ICMP6: 444 if (ifp->if_afdata[AF_INET6] == NULL) { 445 error = EPFNOSUPPORT; 446 goto out; 447 } 448 break; 449 450 case SIOCGIFADDR_IN6: 451 /* This interface is basically deprecated. use SIOCGIFCONF. */ 452 /* FALLTHROUGH */ 453 case SIOCGIFAFLAG_IN6: 454 case SIOCGIFNETMASK_IN6: 455 case SIOCGIFDSTADDR_IN6: 456 case SIOCGIFALIFETIME_IN6: 457 /* must think again about its semantics */ 458 if (ia == NULL) { 459 error = EADDRNOTAVAIL; 460 goto out; 461 } 462 break; 463 464 case SIOCSIFALIFETIME_IN6: 465 { 466 struct in6_addrlifetime *lt; 467 468 if (td != NULL) { 469 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 470 if (error) 471 goto out; 472 } 473 if (ia == NULL) { 474 error = EADDRNOTAVAIL; 475 goto out; 476 } 477 /* sanity for overflow - beware unsigned */ 478 lt = &ifr->ifr_ifru.ifru_lifetime; 479 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 480 lt->ia6t_vltime + time_uptime < time_uptime) { 481 error = EINVAL; 482 goto out; 483 } 484 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 485 lt->ia6t_pltime + time_uptime < time_uptime) { 486 error = EINVAL; 487 goto out; 488 } 489 break; 490 } 491 } 492 493 switch (cmd) { 494 case SIOCGIFADDR_IN6: 495 ifr->ifr_addr = ia->ia_addr; 496 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 497 goto out; 498 break; 499 500 case SIOCGIFDSTADDR_IN6: 501 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 502 error = EINVAL; 503 goto out; 504 } 505 /* 506 * XXX: should we check if ifa_dstaddr is NULL and return 507 * an error? 508 */ 509 ifr->ifr_dstaddr = ia->ia_dstaddr; 510 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 511 goto out; 512 break; 513 514 case SIOCGIFNETMASK_IN6: 515 ifr->ifr_addr = ia->ia_prefixmask; 516 break; 517 518 case SIOCGIFAFLAG_IN6: 519 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 520 break; 521 522 case SIOCGIFSTAT_IN6: 523 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 524 ifp->if_afdata[AF_INET6])->in6_ifstat, 525 &ifr->ifr_ifru.ifru_stat, 526 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 527 break; 528 529 case SIOCGIFSTAT_ICMP6: 530 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 531 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 532 &ifr->ifr_ifru.ifru_icmp6stat, 533 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 534 break; 535 536 case SIOCGIFALIFETIME_IN6: 537 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 538 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 539 time_t maxexpire; 540 struct in6_addrlifetime *retlt = 541 &ifr->ifr_ifru.ifru_lifetime; 542 543 /* 544 * XXX: adjust expiration time assuming time_t is 545 * signed. 546 */ 547 maxexpire = (-1) & 548 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 549 if (ia->ia6_lifetime.ia6t_vltime < 550 maxexpire - ia->ia6_updatetime) { 551 retlt->ia6t_expire = ia->ia6_updatetime + 552 ia->ia6_lifetime.ia6t_vltime; 553 } else 554 retlt->ia6t_expire = maxexpire; 555 } 556 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 557 time_t maxexpire; 558 struct in6_addrlifetime *retlt = 559 &ifr->ifr_ifru.ifru_lifetime; 560 561 /* 562 * XXX: adjust expiration time assuming time_t is 563 * signed. 564 */ 565 maxexpire = (-1) & 566 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 567 if (ia->ia6_lifetime.ia6t_pltime < 568 maxexpire - ia->ia6_updatetime) { 569 retlt->ia6t_preferred = ia->ia6_updatetime + 570 ia->ia6_lifetime.ia6t_pltime; 571 } else 572 retlt->ia6t_preferred = maxexpire; 573 } 574 break; 575 576 case SIOCSIFALIFETIME_IN6: 577 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 578 /* for sanity */ 579 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 580 ia->ia6_lifetime.ia6t_expire = 581 time_uptime + ia->ia6_lifetime.ia6t_vltime; 582 } else 583 ia->ia6_lifetime.ia6t_expire = 0; 584 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 585 ia->ia6_lifetime.ia6t_preferred = 586 time_uptime + ia->ia6_lifetime.ia6t_pltime; 587 } else 588 ia->ia6_lifetime.ia6t_preferred = 0; 589 break; 590 591 case SIOCAIFADDR_IN6: 592 { 593 struct nd_prefixctl pr0; 594 struct nd_prefix *pr; 595 596 /* 597 * first, make or update the interface address structure, 598 * and link it to the list. 599 */ 600 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 601 goto out; 602 if (ia != NULL) 603 ifa_free(&ia->ia_ifa); 604 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 605 == NULL) { 606 /* 607 * this can happen when the user specify the 0 valid 608 * lifetime. 609 */ 610 break; 611 } 612 613 if (cmd == ocmd && ifra->ifra_vhid > 0) { 614 if (carp_attach_p != NULL) 615 error = (*carp_attach_p)(&ia->ia_ifa, 616 ifra->ifra_vhid); 617 else 618 error = EPROTONOSUPPORT; 619 if (error) 620 goto out; 621 else 622 carp_attached = 1; 623 } 624 625 /* 626 * then, make the prefix on-link on the interface. 627 * XXX: we'd rather create the prefix before the address, but 628 * we need at least one address to install the corresponding 629 * interface route, so we configure the address first. 630 */ 631 632 /* 633 * convert mask to prefix length (prefixmask has already 634 * been validated in in6_update_ifa(). 635 */ 636 bzero(&pr0, sizeof(pr0)); 637 pr0.ndpr_ifp = ifp; 638 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 639 NULL); 640 if (pr0.ndpr_plen == 128) { 641 /* we don't need to install a host route. */ 642 goto aifaddr_out; 643 } 644 pr0.ndpr_prefix = ifra->ifra_addr; 645 /* apply the mask for safety. */ 646 IN6_MASK_ADDR(&pr0.ndpr_prefix.sin6_addr, 647 &ifra->ifra_prefixmask.sin6_addr); 648 649 /* 650 * XXX: since we don't have an API to set prefix (not address) 651 * lifetimes, we just use the same lifetimes as addresses. 652 * The (temporarily) installed lifetimes can be overridden by 653 * later advertised RAs (when accept_rtadv is non 0), which is 654 * an intended behavior. 655 */ 656 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 657 pr0.ndpr_raf_auto = 658 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 659 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 660 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 661 662 /* add the prefix if not yet. */ 663 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 664 /* 665 * nd6_prelist_add will install the corresponding 666 * interface route. 667 */ 668 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 669 if (carp_attached) 670 (*carp_detach_p)(&ia->ia_ifa); 671 goto out; 672 } 673 if (pr == NULL) { 674 if (carp_attached) 675 (*carp_detach_p)(&ia->ia_ifa); 676 log(LOG_ERR, "nd6_prelist_add succeeded but " 677 "no prefix\n"); 678 error = EINVAL; 679 goto out; 680 } 681 } 682 683 /* relate the address to the prefix */ 684 if (ia->ia6_ndpr == NULL) { 685 ia->ia6_ndpr = pr; 686 pr->ndpr_refcnt++; 687 688 /* 689 * If this is the first autoconf address from the 690 * prefix, create a temporary address as well 691 * (when required). 692 */ 693 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 694 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 695 int e; 696 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 697 log(LOG_NOTICE, "in6_control: failed " 698 "to create a temporary address, " 699 "errno=%d\n", e); 700 } 701 } 702 } 703 704 /* 705 * this might affect the status of autoconfigured addresses, 706 * that is, this address might make other addresses detached. 707 */ 708 pfxlist_onlink_check(); 709 aifaddr_out: 710 if (error != 0 || ia == NULL) 711 break; 712 /* 713 * Try to clear the flag when a new IPv6 address is added 714 * onto an IFDISABLED interface and it succeeds. 715 */ 716 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 717 struct in6_ndireq nd; 718 719 memset(&nd, 0, sizeof(nd)); 720 nd.ndi.flags = ND_IFINFO(ifp)->flags; 721 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 722 if (nd6_ioctl(SIOCSIFINFO_FLAGS, (caddr_t)&nd, ifp) < 0) 723 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 724 "SIOCSIFINFO_FLAGS for -ifdisabled " 725 "failed."); 726 /* 727 * Ignore failure of clearing the flag intentionally. 728 * The failure means address duplication was detected. 729 */ 730 } 731 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 732 break; 733 } 734 735 case SIOCDIFADDR_IN6: 736 { 737 struct nd_prefix *pr; 738 739 /* 740 * If the address being deleted is the only one that owns 741 * the corresponding prefix, expire the prefix as well. 742 * XXX: theoretically, we don't have to worry about such 743 * relationship, since we separate the address management 744 * and the prefix management. We do this, however, to provide 745 * as much backward compatibility as possible in terms of 746 * the ioctl operation. 747 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 748 */ 749 pr = ia->ia6_ndpr; 750 in6_purgeaddr(&ia->ia_ifa); 751 if (pr && pr->ndpr_refcnt == 0) 752 prelist_remove(pr); 753 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 754 break; 755 } 756 757 default: 758 if (ifp->if_ioctl == NULL) { 759 error = EOPNOTSUPP; 760 goto out; 761 } 762 error = (*ifp->if_ioctl)(ifp, cmd, data); 763 goto out; 764 } 765 766 error = 0; 767 out: 768 if (ia != NULL) 769 ifa_free(&ia->ia_ifa); 770 return (error); 771 } 772 773 774 /* 775 * Join necessary multicast groups. Factored out from in6_update_ifa(). 776 * This entire work should only be done once, for the default FIB. 777 */ 778 static int 779 in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 780 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 781 { 782 char ip6buf[INET6_ADDRSTRLEN]; 783 struct in6_addr mltaddr; 784 struct in6_multi_mship *imm; 785 int delay, error; 786 787 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 788 789 /* Join solicited multicast addr for new host id. */ 790 bzero(&mltaddr, sizeof(struct in6_addr)); 791 mltaddr.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 792 mltaddr.s6_addr32[2] = htonl(1); 793 mltaddr.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 794 mltaddr.s6_addr8[12] = 0xff; 795 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) { 796 /* XXX: should not happen */ 797 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 798 goto cleanup; 799 } 800 delay = error = 0; 801 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 802 /* 803 * We need a random delay for DAD on the address being 804 * configured. It also means delaying transmission of the 805 * corresponding MLD report to avoid report collision. 806 * [RFC 4861, Section 6.3.7] 807 */ 808 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 809 } 810 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 811 if (imm == NULL) { 812 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 813 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 814 if_name(ifp), error)); 815 goto cleanup; 816 } 817 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 818 *in6m_sol = imm->i6mm_maddr; 819 820 /* 821 * Join link-local all-nodes address. 822 */ 823 mltaddr = in6addr_linklocal_allnodes; 824 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 825 goto cleanup; /* XXX: should not fail */ 826 827 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 828 if (imm == NULL) { 829 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 830 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &mltaddr), 831 if_name(ifp), error)); 832 goto cleanup; 833 } 834 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 835 836 /* 837 * Join node information group address. 838 */ 839 delay = 0; 840 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 841 /* 842 * The spec does not say anything about delay for this group, 843 * but the same logic should apply. 844 */ 845 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 846 } 847 if (in6_nigroup(ifp, NULL, -1, &mltaddr) == 0) { 848 /* XXX jinmei */ 849 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 850 if (imm == NULL) 851 nd6log((LOG_WARNING, 852 "%s: in6_joingroup failed for %s on %s " 853 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 854 &mltaddr), if_name(ifp), error)); 855 /* XXX not very fatal, go on... */ 856 else 857 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 858 } 859 if (V_icmp6_nodeinfo_oldmcprefix && 860 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr) == 0) { 861 imm = in6_joingroup(ifp, &mltaddr, &error, delay); 862 if (imm == NULL) 863 nd6log((LOG_WARNING, 864 "%s: in6_joingroup failed for %s on %s " 865 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 866 &mltaddr), if_name(ifp), error)); 867 /* XXX not very fatal, go on... */ 868 else 869 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 870 } 871 872 /* 873 * Join interface-local all-nodes address. 874 * (ff01::1%ifN, and ff01::%ifN/32) 875 */ 876 mltaddr = in6addr_nodelocal_allnodes; 877 if ((error = in6_setscope(&mltaddr, ifp, NULL)) != 0) 878 goto cleanup; /* XXX: should not fail */ 879 880 imm = in6_joingroup(ifp, &mltaddr, &error, 0); 881 if (imm == NULL) { 882 nd6log((LOG_WARNING, "%s: in6_joingroup failed for %s on %s " 883 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 884 &mltaddr), if_name(ifp), error)); 885 goto cleanup; 886 } 887 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 888 889 cleanup: 890 return (error); 891 } 892 893 /* 894 * Update parameters of an IPv6 interface address. 895 * If necessary, a new entry is created and linked into address chains. 896 * This function is separated from in6_control(). 897 */ 898 int 899 in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 900 struct in6_ifaddr *ia, int flags) 901 { 902 int error, hostIsNew = 0; 903 904 if ((error = in6_validate_ifra(ifp, ifra, ia, flags)) != 0) 905 return (error); 906 907 if (ia == NULL) { 908 hostIsNew = 1; 909 if ((ia = in6_alloc_ifa(ifp, ifra, flags)) == NULL) 910 return (ENOBUFS); 911 } 912 913 error = in6_update_ifa_internal(ifp, ifra, ia, hostIsNew, flags); 914 if (error != 0) { 915 if (hostIsNew != 0) { 916 in6_unlink_ifa(ia, ifp); 917 ifa_free(&ia->ia_ifa); 918 } 919 return (error); 920 } 921 922 if (hostIsNew) 923 error = in6_broadcast_ifa(ifp, ifra, ia, flags); 924 925 return (error); 926 } 927 928 /* 929 * Fill in basic IPv6 address request info. 930 */ 931 void 932 in6_prepare_ifra(struct in6_aliasreq *ifra, const struct in6_addr *addr, 933 const struct in6_addr *mask) 934 { 935 936 memset(ifra, 0, sizeof(struct in6_aliasreq)); 937 938 ifra->ifra_addr.sin6_family = AF_INET6; 939 ifra->ifra_addr.sin6_len = sizeof(struct sockaddr_in6); 940 if (addr != NULL) 941 ifra->ifra_addr.sin6_addr = *addr; 942 943 ifra->ifra_prefixmask.sin6_family = AF_INET6; 944 ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 945 if (mask != NULL) 946 ifra->ifra_prefixmask.sin6_addr = *mask; 947 } 948 949 static int 950 in6_validate_ifra(struct ifnet *ifp, struct in6_aliasreq *ifra, 951 struct in6_ifaddr *ia, int flags) 952 { 953 int plen = -1; 954 struct sockaddr_in6 dst6; 955 struct in6_addrlifetime *lt; 956 char ip6buf[INET6_ADDRSTRLEN]; 957 958 /* Validate parameters */ 959 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 960 return (EINVAL); 961 962 /* 963 * The destination address for a p2p link must have a family 964 * of AF_UNSPEC or AF_INET6. 965 */ 966 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 967 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 968 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 969 return (EAFNOSUPPORT); 970 971 /* 972 * Validate address 973 */ 974 if (ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6) || 975 ifra->ifra_addr.sin6_family != AF_INET6) 976 return (EINVAL); 977 978 /* 979 * validate ifra_prefixmask. don't check sin6_family, netmask 980 * does not carry fields other than sin6_len. 981 */ 982 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 983 return (EINVAL); 984 /* 985 * Because the IPv6 address architecture is classless, we require 986 * users to specify a (non 0) prefix length (mask) for a new address. 987 * We also require the prefix (when specified) mask is valid, and thus 988 * reject a non-consecutive mask. 989 */ 990 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 991 return (EINVAL); 992 if (ifra->ifra_prefixmask.sin6_len != 0) { 993 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 994 (u_char *)&ifra->ifra_prefixmask + 995 ifra->ifra_prefixmask.sin6_len); 996 if (plen <= 0) 997 return (EINVAL); 998 } else { 999 /* 1000 * In this case, ia must not be NULL. We just use its prefix 1001 * length. 1002 */ 1003 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1004 } 1005 /* 1006 * If the destination address on a p2p interface is specified, 1007 * and the address is a scoped one, validate/set the scope 1008 * zone identifier. 1009 */ 1010 dst6 = ifra->ifra_dstaddr; 1011 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1012 (dst6.sin6_family == AF_INET6)) { 1013 struct in6_addr in6_tmp; 1014 u_int32_t zoneid; 1015 1016 in6_tmp = dst6.sin6_addr; 1017 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1018 return (EINVAL); /* XXX: should be impossible */ 1019 1020 if (dst6.sin6_scope_id != 0) { 1021 if (dst6.sin6_scope_id != zoneid) 1022 return (EINVAL); 1023 } else /* user omit to specify the ID. */ 1024 dst6.sin6_scope_id = zoneid; 1025 1026 /* convert into the internal form */ 1027 if (sa6_embedscope(&dst6, 0)) 1028 return (EINVAL); /* XXX: should be impossible */ 1029 } 1030 /* Modify original ifra_dstaddr to reflect changes */ 1031 ifra->ifra_dstaddr = dst6; 1032 1033 /* 1034 * The destination address can be specified only for a p2p or a 1035 * loopback interface. If specified, the corresponding prefix length 1036 * must be 128. 1037 */ 1038 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1039 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1040 /* XXX: noisy message */ 1041 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1042 "be specified for a p2p or a loopback IF only\n")); 1043 return (EINVAL); 1044 } 1045 if (plen != 128) { 1046 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1047 "be 128 when dstaddr is specified\n")); 1048 return (EINVAL); 1049 } 1050 } 1051 /* lifetime consistency check */ 1052 lt = &ifra->ifra_lifetime; 1053 if (lt->ia6t_pltime > lt->ia6t_vltime) 1054 return (EINVAL); 1055 if (lt->ia6t_vltime == 0) { 1056 /* 1057 * the following log might be noisy, but this is a typical 1058 * configuration mistake or a tool's bug. 1059 */ 1060 nd6log((LOG_INFO, 1061 "in6_update_ifa: valid lifetime is 0 for %s\n", 1062 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1063 1064 if (ia == NULL) 1065 return (0); /* there's nothing to do */ 1066 } 1067 1068 /* Check prefix mask */ 1069 if (ia != NULL && ifra->ifra_prefixmask.sin6_len != 0) { 1070 /* 1071 * We prohibit changing the prefix length of an existing 1072 * address, because 1073 * + such an operation should be rare in IPv6, and 1074 * + the operation would confuse prefix management. 1075 */ 1076 if (ia->ia_prefixmask.sin6_len != 0 && 1077 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1078 nd6log((LOG_INFO, "in6_validate_ifa: the prefix length " 1079 "of an existing %s address should not be changed\n", 1080 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1081 1082 return (EINVAL); 1083 } 1084 } 1085 1086 return (0); 1087 } 1088 1089 1090 /* 1091 * Allocate a new ifaddr and link it into chains. 1092 */ 1093 static struct in6_ifaddr * 1094 in6_alloc_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, int flags) 1095 { 1096 struct in6_ifaddr *ia; 1097 1098 /* 1099 * When in6_alloc_ifa() is called in a process of a received 1100 * RA, it is called under an interrupt context. So, we should 1101 * call malloc with M_NOWAIT. 1102 */ 1103 ia = (struct in6_ifaddr *)ifa_alloc(sizeof(*ia), M_NOWAIT); 1104 if (ia == NULL) 1105 return (NULL); 1106 LIST_INIT(&ia->ia6_memberships); 1107 /* Initialize the address and masks, and put time stamp */ 1108 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1109 ia->ia_addr.sin6_family = AF_INET6; 1110 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1111 /* XXX: Can we assign ,sin6_addr and skip the rest? */ 1112 ia->ia_addr = ifra->ifra_addr; 1113 ia->ia6_createtime = time_uptime; 1114 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1115 /* 1116 * Some functions expect that ifa_dstaddr is not 1117 * NULL for p2p interfaces. 1118 */ 1119 ia->ia_ifa.ifa_dstaddr = 1120 (struct sockaddr *)&ia->ia_dstaddr; 1121 } else { 1122 ia->ia_ifa.ifa_dstaddr = NULL; 1123 } 1124 1125 /* set prefix mask if any */ 1126 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1127 if (ifra->ifra_prefixmask.sin6_len != 0) { 1128 ia->ia_prefixmask.sin6_family = AF_INET6; 1129 ia->ia_prefixmask.sin6_len = ifra->ifra_prefixmask.sin6_len; 1130 ia->ia_prefixmask.sin6_addr = ifra->ifra_prefixmask.sin6_addr; 1131 } 1132 1133 ia->ia_ifp = ifp; 1134 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1135 IF_ADDR_WLOCK(ifp); 1136 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1137 IF_ADDR_WUNLOCK(ifp); 1138 1139 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1140 IN6_IFADDR_WLOCK(); 1141 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1142 LIST_INSERT_HEAD(IN6ADDR_HASH(&ia->ia_addr.sin6_addr), ia, ia6_hash); 1143 IN6_IFADDR_WUNLOCK(); 1144 1145 return (ia); 1146 } 1147 1148 /* 1149 * Update/configure interface address parameters: 1150 * 1151 * 1) Update lifetime 1152 * 2) Update interface metric ad flags 1153 * 3) Notify other subsystems 1154 */ 1155 static int 1156 in6_update_ifa_internal(struct ifnet *ifp, struct in6_aliasreq *ifra, 1157 struct in6_ifaddr *ia, int hostIsNew, int flags) 1158 { 1159 int error; 1160 1161 /* update timestamp */ 1162 ia->ia6_updatetime = time_uptime; 1163 1164 /* 1165 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1166 * to see if the address is deprecated or invalidated, but initialize 1167 * these members for applications. 1168 */ 1169 ia->ia6_lifetime = ifra->ifra_lifetime; 1170 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1171 ia->ia6_lifetime.ia6t_expire = 1172 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1173 } else 1174 ia->ia6_lifetime.ia6t_expire = 0; 1175 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1176 ia->ia6_lifetime.ia6t_preferred = 1177 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1178 } else 1179 ia->ia6_lifetime.ia6t_preferred = 0; 1180 1181 /* 1182 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1183 * userland, make it deprecated. 1184 */ 1185 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1186 ia->ia6_lifetime.ia6t_pltime = 0; 1187 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1188 } 1189 1190 /* 1191 * configure address flags. 1192 */ 1193 ia->ia6_flags = ifra->ifra_flags; 1194 1195 /* 1196 * Make the address tentative before joining multicast addresses, 1197 * so that corresponding MLD responses would not have a tentative 1198 * source address. 1199 */ 1200 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1201 if (hostIsNew && in6if_do_dad(ifp)) 1202 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1203 1204 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 1205 if (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 /* 1247 * Perform DAD, if needed. 1248 * XXX It may be of use, if we can administratively disable DAD. 1249 */ 1250 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1251 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1252 { 1253 int delay, mindelay, maxdelay; 1254 1255 delay = 0; 1256 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1257 /* 1258 * We need to impose a delay before sending an NS 1259 * for DAD. Check if we also needed a delay for the 1260 * corresponding MLD message. If we did, the delay 1261 * should be larger than the MLD delay (this could be 1262 * relaxed a bit, but this simple logic is at least 1263 * safe). 1264 * XXX: Break data hiding guidelines and look at 1265 * state for the solicited multicast group. 1266 */ 1267 mindelay = 0; 1268 if (in6m_sol != NULL && 1269 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1270 mindelay = in6m_sol->in6m_timer; 1271 } 1272 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1273 if (maxdelay - mindelay == 0) 1274 delay = 0; 1275 else { 1276 delay = 1277 (arc4random() % (maxdelay - mindelay)) + 1278 mindelay; 1279 } 1280 } 1281 nd6_dad_start((struct ifaddr *)ia, delay); 1282 } 1283 1284 ifa_free(&ia->ia_ifa); 1285 return (error); 1286 } 1287 1288 /* 1289 * Leave from multicast groups we have joined for the interface. 1290 */ 1291 static int 1292 in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0) 1293 { 1294 struct in6_multi_mship *imm; 1295 1296 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1297 LIST_REMOVE(imm, i6mm_chain); 1298 in6_leavegroup(imm); 1299 } 1300 return (0); 1301 } 1302 1303 void 1304 in6_purgeaddr(struct ifaddr *ifa) 1305 { 1306 struct ifnet *ifp = ifa->ifa_ifp; 1307 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1308 int plen, error; 1309 struct ifaddr *ifa0; 1310 1311 if (ifa->ifa_carp) 1312 (*carp_detach_p)(ifa); 1313 1314 /* 1315 * find another IPv6 address as the gateway for the 1316 * link-local and node-local all-nodes multicast 1317 * address routes 1318 */ 1319 IF_ADDR_RLOCK(ifp); 1320 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) { 1321 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1322 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1323 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0) 1324 continue; 1325 else 1326 break; 1327 } 1328 if (ifa0 != NULL) 1329 ifa_ref(ifa0); 1330 IF_ADDR_RUNLOCK(ifp); 1331 1332 /* 1333 * Remove the loopback route to the interface address. 1334 * The check for the current setting of "nd6_useloopback" 1335 * is not needed. 1336 */ 1337 if (ia->ia_flags & IFA_RTSELF) { 1338 error = ifa_del_loopback_route((struct ifaddr *)ia, 1339 (struct sockaddr *)&ia->ia_addr); 1340 if (error == 0) 1341 ia->ia_flags &= ~IFA_RTSELF; 1342 } 1343 1344 /* stop DAD processing */ 1345 nd6_dad_stop(ifa); 1346 1347 /* Remove local address entry from lltable. */ 1348 nd6_rem_ifa_lle(ia); 1349 1350 /* Leave multicast groups. */ 1351 error = in6_purgeaddr_mc(ifp, ia, ifa0); 1352 1353 if (ifa0 != NULL) 1354 ifa_free(ifa0); 1355 1356 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1357 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1358 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1359 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0); 1360 if (error != 0) 1361 log(LOG_INFO, "%s: err=%d, destination address delete " 1362 "failed\n", __func__, error); 1363 ia->ia_flags &= ~IFA_ROUTE; 1364 } 1365 1366 in6_unlink_ifa(ia, ifp); 1367 } 1368 1369 static void 1370 in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1371 { 1372 1373 IF_ADDR_WLOCK(ifp); 1374 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1375 IF_ADDR_WUNLOCK(ifp); 1376 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1377 1378 /* 1379 * Defer the release of what might be the last reference to the 1380 * in6_ifaddr so that it can't be freed before the remainder of the 1381 * cleanup. 1382 */ 1383 IN6_IFADDR_WLOCK(); 1384 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1385 LIST_REMOVE(ia, ia6_hash); 1386 IN6_IFADDR_WUNLOCK(); 1387 1388 /* 1389 * Release the reference to the base prefix. There should be a 1390 * positive reference. 1391 */ 1392 if (ia->ia6_ndpr == NULL) { 1393 nd6log((LOG_NOTICE, 1394 "in6_unlink_ifa: autoconf'ed address " 1395 "%p has no prefix\n", ia)); 1396 } else { 1397 ia->ia6_ndpr->ndpr_refcnt--; 1398 ia->ia6_ndpr = NULL; 1399 } 1400 1401 /* 1402 * Also, if the address being removed is autoconf'ed, call 1403 * pfxlist_onlink_check() since the release might affect the status of 1404 * other (detached) addresses. 1405 */ 1406 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1407 pfxlist_onlink_check(); 1408 } 1409 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1410 } 1411 1412 /* 1413 * Notifies other other subsystems about address change/arrival: 1414 * 1) Notifies device handler on first IPv6 address assignment 1415 * 2) Handle routing table changes for P2P links and route 1416 * 3) Handle routing table changes for address host route 1417 */ 1418 static int 1419 in6_notify_ifa(struct ifnet *ifp, struct in6_ifaddr *ia, 1420 struct in6_aliasreq *ifra, int hostIsNew) 1421 { 1422 int error = 0, plen, ifacount = 0; 1423 struct ifaddr *ifa; 1424 struct sockaddr_in6 *pdst; 1425 char ip6buf[INET6_ADDRSTRLEN]; 1426 1427 /* 1428 * Give the interface a chance to initialize 1429 * if this is its first address, 1430 */ 1431 if (hostIsNew != 0) { 1432 IF_ADDR_RLOCK(ifp); 1433 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1434 if (ifa->ifa_addr->sa_family != AF_INET6) 1435 continue; 1436 ifacount++; 1437 } 1438 IF_ADDR_RUNLOCK(ifp); 1439 } 1440 1441 if (ifacount <= 1 && ifp->if_ioctl) { 1442 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1443 if (error) 1444 return (error); 1445 } 1446 1447 /* 1448 * If a new destination address is specified, scrub the old one and 1449 * install the new destination. Note that the interface must be 1450 * p2p or loopback. 1451 */ 1452 pdst = &ifra->ifra_dstaddr; 1453 if (pdst->sin6_family == AF_INET6 && 1454 !IN6_ARE_ADDR_EQUAL(&pdst->sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1455 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1456 (rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST) != 0)) { 1457 nd6log((LOG_ERR, "in6_update_ifa_internal: failed to " 1458 "remove a route to the old destination: %s\n", 1459 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1460 /* proceed anyway... */ 1461 } else 1462 ia->ia_flags &= ~IFA_ROUTE; 1463 ia->ia_dstaddr = *pdst; 1464 } 1465 1466 /* 1467 * If a new destination address is specified for a point-to-point 1468 * interface, install a route to the destination as an interface 1469 * direct route. 1470 * XXX: the logic below rejects assigning multiple addresses on a p2p 1471 * interface that share the same destination. 1472 */ 1473 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1474 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1475 ia->ia_dstaddr.sin6_family == AF_INET6) { 1476 int rtflags = RTF_UP | RTF_HOST; 1477 /* 1478 * Handle the case for ::1 . 1479 */ 1480 if (ifp->if_flags & IFF_LOOPBACK) 1481 ia->ia_flags |= IFA_RTSELF; 1482 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1483 if (error) 1484 return (error); 1485 ia->ia_flags |= IFA_ROUTE; 1486 } 1487 1488 /* 1489 * add a loopback route to self if not exists 1490 */ 1491 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1492 error = ifa_add_loopback_route((struct ifaddr *)ia, 1493 (struct sockaddr *)&ia->ia_addr); 1494 if (error == 0) 1495 ia->ia_flags |= IFA_RTSELF; 1496 } 1497 1498 return (error); 1499 } 1500 1501 /* 1502 * Find an IPv6 interface link-local address specific to an interface. 1503 * ifaddr is returned referenced. 1504 */ 1505 struct in6_ifaddr * 1506 in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1507 { 1508 struct ifaddr *ifa; 1509 1510 IF_ADDR_RLOCK(ifp); 1511 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1512 if (ifa->ifa_addr->sa_family != AF_INET6) 1513 continue; 1514 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1515 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1516 ignoreflags) != 0) 1517 continue; 1518 ifa_ref(ifa); 1519 break; 1520 } 1521 } 1522 IF_ADDR_RUNLOCK(ifp); 1523 1524 return ((struct in6_ifaddr *)ifa); 1525 } 1526 1527 1528 /* 1529 * find the internet address corresponding to a given address. 1530 * ifaddr is returned referenced. 1531 */ 1532 struct in6_ifaddr * 1533 in6ifa_ifwithaddr(const struct in6_addr *addr, uint32_t zoneid) 1534 { 1535 struct in6_ifaddr *ia; 1536 1537 IN6_IFADDR_RLOCK(); 1538 LIST_FOREACH(ia, IN6ADDR_HASH(addr), ia6_hash) { 1539 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), addr)) { 1540 if (zoneid != 0 && 1541 zoneid != ia->ia_addr.sin6_scope_id) 1542 continue; 1543 ifa_ref(&ia->ia_ifa); 1544 break; 1545 } 1546 } 1547 IN6_IFADDR_RUNLOCK(); 1548 return (ia); 1549 } 1550 1551 /* 1552 * find the internet address corresponding to a given interface and address. 1553 * ifaddr is returned referenced. 1554 */ 1555 struct in6_ifaddr * 1556 in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1557 { 1558 struct ifaddr *ifa; 1559 1560 IF_ADDR_RLOCK(ifp); 1561 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1562 if (ifa->ifa_addr->sa_family != AF_INET6) 1563 continue; 1564 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1565 ifa_ref(ifa); 1566 break; 1567 } 1568 } 1569 IF_ADDR_RUNLOCK(ifp); 1570 1571 return ((struct in6_ifaddr *)ifa); 1572 } 1573 1574 /* 1575 * Find a link-local scoped address on ifp and return it if any. 1576 */ 1577 struct in6_ifaddr * 1578 in6ifa_llaonifp(struct ifnet *ifp) 1579 { 1580 struct sockaddr_in6 *sin6; 1581 struct ifaddr *ifa; 1582 1583 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1584 return (NULL); 1585 if_addr_rlock(ifp); 1586 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1587 if (ifa->ifa_addr->sa_family != AF_INET6) 1588 continue; 1589 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 1590 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 1591 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 1592 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 1593 break; 1594 } 1595 if_addr_runlock(ifp); 1596 1597 return ((struct in6_ifaddr *)ifa); 1598 } 1599 1600 /* 1601 * Convert IP6 address to printable (loggable) representation. Caller 1602 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 1603 */ 1604 static char digits[] = "0123456789abcdef"; 1605 char * 1606 ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 1607 { 1608 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 1609 char *cp; 1610 const u_int16_t *a = (const u_int16_t *)addr; 1611 const u_int8_t *d; 1612 int dcolon = 0, zero = 0; 1613 1614 cp = ip6buf; 1615 1616 for (i = 0; i < 8; i++) { 1617 if (*(a + i) == 0) { 1618 cnt++; 1619 if (cnt == 1) 1620 idx = i; 1621 } 1622 else if (maxcnt < cnt) { 1623 maxcnt = cnt; 1624 index = idx; 1625 cnt = 0; 1626 } 1627 } 1628 if (maxcnt < cnt) { 1629 maxcnt = cnt; 1630 index = idx; 1631 } 1632 1633 for (i = 0; i < 8; i++) { 1634 if (dcolon == 1) { 1635 if (*a == 0) { 1636 if (i == 7) 1637 *cp++ = ':'; 1638 a++; 1639 continue; 1640 } else 1641 dcolon = 2; 1642 } 1643 if (*a == 0) { 1644 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 1645 if (i == 0) 1646 *cp++ = ':'; 1647 *cp++ = ':'; 1648 dcolon = 1; 1649 } else { 1650 *cp++ = '0'; 1651 *cp++ = ':'; 1652 } 1653 a++; 1654 continue; 1655 } 1656 d = (const u_char *)a; 1657 /* Try to eliminate leading zeros in printout like in :0001. */ 1658 zero = 1; 1659 *cp = digits[*d >> 4]; 1660 if (*cp != '0') { 1661 zero = 0; 1662 cp++; 1663 } 1664 *cp = digits[*d++ & 0xf]; 1665 if (zero == 0 || (*cp != '0')) { 1666 zero = 0; 1667 cp++; 1668 } 1669 *cp = digits[*d >> 4]; 1670 if (zero == 0 || (*cp != '0')) { 1671 zero = 0; 1672 cp++; 1673 } 1674 *cp++ = digits[*d & 0xf]; 1675 *cp++ = ':'; 1676 a++; 1677 } 1678 *--cp = '\0'; 1679 return (ip6buf); 1680 } 1681 1682 int 1683 in6_localaddr(struct in6_addr *in6) 1684 { 1685 struct in6_ifaddr *ia; 1686 1687 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 1688 return 1; 1689 1690 IN6_IFADDR_RLOCK(); 1691 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 1692 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1693 &ia->ia_prefixmask.sin6_addr)) { 1694 IN6_IFADDR_RUNLOCK(); 1695 return 1; 1696 } 1697 } 1698 IN6_IFADDR_RUNLOCK(); 1699 1700 return (0); 1701 } 1702 1703 /* 1704 * Return 1 if an internet address is for the local host and configured 1705 * on one of its interfaces. 1706 */ 1707 int 1708 in6_localip(struct in6_addr *in6) 1709 { 1710 struct in6_ifaddr *ia; 1711 1712 IN6_IFADDR_RLOCK(); 1713 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 1714 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 1715 IN6_IFADDR_RUNLOCK(); 1716 return (1); 1717 } 1718 } 1719 IN6_IFADDR_RUNLOCK(); 1720 return (0); 1721 } 1722 1723 int 1724 in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 1725 { 1726 struct in6_ifaddr *ia; 1727 1728 IN6_IFADDR_RLOCK(); 1729 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 1730 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 1731 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 1732 IN6_IFADDR_RUNLOCK(); 1733 return (1); /* true */ 1734 } 1735 break; 1736 } 1737 } 1738 IN6_IFADDR_RUNLOCK(); 1739 1740 return (0); /* false */ 1741 } 1742 1743 /* 1744 * return length of part which dst and src are equal 1745 * hard coding... 1746 */ 1747 int 1748 in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 1749 { 1750 int match = 0; 1751 u_char *s = (u_char *)src, *d = (u_char *)dst; 1752 u_char *lim = s + 16, r; 1753 1754 while (s < lim) 1755 if ((r = (*d++ ^ *s++)) != 0) { 1756 while (r < 128) { 1757 match++; 1758 r <<= 1; 1759 } 1760 break; 1761 } else 1762 match += 8; 1763 return match; 1764 } 1765 1766 /* XXX: to be scope conscious */ 1767 int 1768 in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 1769 { 1770 int bytelen, bitlen; 1771 1772 /* sanity check */ 1773 if (0 > len || len > 128) { 1774 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 1775 len); 1776 return (0); 1777 } 1778 1779 bytelen = len / 8; 1780 bitlen = len % 8; 1781 1782 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 1783 return (0); 1784 if (bitlen != 0 && 1785 p1->s6_addr[bytelen] >> (8 - bitlen) != 1786 p2->s6_addr[bytelen] >> (8 - bitlen)) 1787 return (0); 1788 1789 return (1); 1790 } 1791 1792 void 1793 in6_prefixlen2mask(struct in6_addr *maskp, int len) 1794 { 1795 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 1796 int bytelen, bitlen, i; 1797 1798 /* sanity check */ 1799 if (0 > len || len > 128) { 1800 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 1801 len); 1802 return; 1803 } 1804 1805 bzero(maskp, sizeof(*maskp)); 1806 bytelen = len / 8; 1807 bitlen = len % 8; 1808 for (i = 0; i < bytelen; i++) 1809 maskp->s6_addr[i] = 0xff; 1810 if (bitlen) 1811 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 1812 } 1813 1814 /* 1815 * return the best address out of the same scope. if no address was 1816 * found, return the first valid address from designated IF. 1817 */ 1818 struct in6_ifaddr * 1819 in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 1820 { 1821 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 1822 struct ifaddr *ifa; 1823 struct in6_ifaddr *besta = 0; 1824 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 1825 1826 dep[0] = dep[1] = NULL; 1827 1828 /* 1829 * We first look for addresses in the same scope. 1830 * If there is one, return it. 1831 * If two or more, return one which matches the dst longest. 1832 * If none, return one of global addresses assigned other ifs. 1833 */ 1834 IF_ADDR_RLOCK(ifp); 1835 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1836 if (ifa->ifa_addr->sa_family != AF_INET6) 1837 continue; 1838 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1839 continue; /* XXX: is there any case to allow anycast? */ 1840 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1841 continue; /* don't use this interface */ 1842 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1843 continue; 1844 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1845 if (V_ip6_use_deprecated) 1846 dep[0] = (struct in6_ifaddr *)ifa; 1847 continue; 1848 } 1849 1850 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 1851 /* 1852 * call in6_matchlen() as few as possible 1853 */ 1854 if (besta) { 1855 if (blen == -1) 1856 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 1857 tlen = in6_matchlen(IFA_IN6(ifa), dst); 1858 if (tlen > blen) { 1859 blen = tlen; 1860 besta = (struct in6_ifaddr *)ifa; 1861 } 1862 } else 1863 besta = (struct in6_ifaddr *)ifa; 1864 } 1865 } 1866 if (besta) { 1867 ifa_ref(&besta->ia_ifa); 1868 IF_ADDR_RUNLOCK(ifp); 1869 return (besta); 1870 } 1871 1872 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1873 if (ifa->ifa_addr->sa_family != AF_INET6) 1874 continue; 1875 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 1876 continue; /* XXX: is there any case to allow anycast? */ 1877 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 1878 continue; /* don't use this interface */ 1879 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 1880 continue; 1881 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 1882 if (V_ip6_use_deprecated) 1883 dep[1] = (struct in6_ifaddr *)ifa; 1884 continue; 1885 } 1886 1887 if (ifa != NULL) 1888 ifa_ref(ifa); 1889 IF_ADDR_RUNLOCK(ifp); 1890 return (struct in6_ifaddr *)ifa; 1891 } 1892 1893 /* use the last-resort values, that are, deprecated addresses */ 1894 if (dep[0]) { 1895 ifa_ref((struct ifaddr *)dep[0]); 1896 IF_ADDR_RUNLOCK(ifp); 1897 return dep[0]; 1898 } 1899 if (dep[1]) { 1900 ifa_ref((struct ifaddr *)dep[1]); 1901 IF_ADDR_RUNLOCK(ifp); 1902 return dep[1]; 1903 } 1904 1905 IF_ADDR_RUNLOCK(ifp); 1906 return NULL; 1907 } 1908 1909 /* 1910 * perform DAD when interface becomes IFF_UP. 1911 */ 1912 void 1913 in6_if_up(struct ifnet *ifp) 1914 { 1915 struct ifaddr *ifa; 1916 struct in6_ifaddr *ia; 1917 1918 IF_ADDR_RLOCK(ifp); 1919 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1920 if (ifa->ifa_addr->sa_family != AF_INET6) 1921 continue; 1922 ia = (struct in6_ifaddr *)ifa; 1923 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 1924 /* 1925 * The TENTATIVE flag was likely set by hand 1926 * beforehand, implicitly indicating the need for DAD. 1927 * We may be able to skip the random delay in this 1928 * case, but we impose delays just in case. 1929 */ 1930 nd6_dad_start(ifa, 1931 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 1932 } 1933 } 1934 IF_ADDR_RUNLOCK(ifp); 1935 1936 /* 1937 * special cases, like 6to4, are handled in in6_ifattach 1938 */ 1939 in6_ifattach(ifp, NULL); 1940 } 1941 1942 int 1943 in6if_do_dad(struct ifnet *ifp) 1944 { 1945 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 1946 return (0); 1947 1948 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1949 return (0); 1950 1951 switch (ifp->if_type) { 1952 #ifdef IFT_DUMMY 1953 case IFT_DUMMY: 1954 #endif 1955 case IFT_FAITH: 1956 /* 1957 * These interfaces do not have the IFF_LOOPBACK flag, 1958 * but loop packets back. We do not have to do DAD on such 1959 * interfaces. We should even omit it, because loop-backed 1960 * NS would confuse the DAD procedure. 1961 */ 1962 return (0); 1963 default: 1964 /* 1965 * Our DAD routine requires the interface up and running. 1966 * However, some interfaces can be up before the RUNNING 1967 * status. Additionaly, users may try to assign addresses 1968 * before the interface becomes up (or running). 1969 * We simply skip DAD in such a case as a work around. 1970 * XXX: we should rather mark "tentative" on such addresses, 1971 * and do DAD after the interface becomes ready. 1972 */ 1973 if (!((ifp->if_flags & IFF_UP) && 1974 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 1975 return (0); 1976 1977 return (1); 1978 } 1979 } 1980 1981 /* 1982 * Calculate max IPv6 MTU through all the interfaces and store it 1983 * to in6_maxmtu. 1984 */ 1985 void 1986 in6_setmaxmtu(void) 1987 { 1988 unsigned long maxmtu = 0; 1989 struct ifnet *ifp; 1990 1991 IFNET_RLOCK_NOSLEEP(); 1992 TAILQ_FOREACH(ifp, &V_ifnet, if_list) { 1993 /* this function can be called during ifnet initialization */ 1994 if (!ifp->if_afdata[AF_INET6]) 1995 continue; 1996 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 1997 IN6_LINKMTU(ifp) > maxmtu) 1998 maxmtu = IN6_LINKMTU(ifp); 1999 } 2000 IFNET_RUNLOCK_NOSLEEP(); 2001 if (maxmtu) /* update only when maxmtu is positive */ 2002 V_in6_maxmtu = maxmtu; 2003 } 2004 2005 /* 2006 * Provide the length of interface identifiers to be used for the link attached 2007 * to the given interface. The length should be defined in "IPv6 over 2008 * xxx-link" document. Note that address architecture might also define 2009 * the length for a particular set of address prefixes, regardless of the 2010 * link type. As clarified in rfc2462bis, those two definitions should be 2011 * consistent, and those really are as of August 2004. 2012 */ 2013 int 2014 in6_if2idlen(struct ifnet *ifp) 2015 { 2016 switch (ifp->if_type) { 2017 case IFT_ETHER: /* RFC2464 */ 2018 #ifdef IFT_PROPVIRTUAL 2019 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2020 #endif 2021 #ifdef IFT_L2VLAN 2022 case IFT_L2VLAN: /* ditto */ 2023 #endif 2024 #ifdef IFT_IEEE80211 2025 case IFT_IEEE80211: /* ditto */ 2026 #endif 2027 #ifdef IFT_MIP 2028 case IFT_MIP: /* ditto */ 2029 #endif 2030 case IFT_INFINIBAND: 2031 return (64); 2032 case IFT_FDDI: /* RFC2467 */ 2033 return (64); 2034 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2035 return (64); 2036 case IFT_PPP: /* RFC2472 */ 2037 return (64); 2038 case IFT_ARCNET: /* RFC2497 */ 2039 return (64); 2040 case IFT_FRELAY: /* RFC2590 */ 2041 return (64); 2042 case IFT_IEEE1394: /* RFC3146 */ 2043 return (64); 2044 case IFT_GIF: 2045 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2046 case IFT_LOOP: 2047 return (64); /* XXX: is this really correct? */ 2048 default: 2049 /* 2050 * Unknown link type: 2051 * It might be controversial to use the today's common constant 2052 * of 64 for these cases unconditionally. For full compliance, 2053 * we should return an error in this case. On the other hand, 2054 * if we simply miss the standard for the link type or a new 2055 * standard is defined for a new link type, the IFID length 2056 * is very likely to be the common constant. As a compromise, 2057 * we always use the constant, but make an explicit notice 2058 * indicating the "unknown" case. 2059 */ 2060 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2061 return (64); 2062 } 2063 } 2064 2065 #include <sys/sysctl.h> 2066 2067 struct in6_llentry { 2068 struct llentry base; 2069 struct sockaddr_in6 l3_addr6; 2070 }; 2071 2072 /* 2073 * Deletes an address from the address table. 2074 * This function is called by the timer functions 2075 * such as arptimer() and nd6_llinfo_timer(), and 2076 * the caller does the locking. 2077 */ 2078 static void 2079 in6_lltable_free(struct lltable *llt, struct llentry *lle) 2080 { 2081 LLE_WUNLOCK(lle); 2082 LLE_LOCK_DESTROY(lle); 2083 free(lle, M_LLTABLE); 2084 } 2085 2086 static struct llentry * 2087 in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2088 { 2089 struct in6_llentry *lle; 2090 2091 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2092 if (lle == NULL) /* NB: caller generates msg */ 2093 return NULL; 2094 2095 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2096 lle->base.lle_refcnt = 1; 2097 lle->base.lle_free = in6_lltable_free; 2098 LLE_LOCK_INIT(&lle->base); 2099 callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock, 2100 CALLOUT_RETURNUNLOCKED); 2101 2102 return (&lle->base); 2103 } 2104 2105 static void 2106 in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 2107 const struct sockaddr *mask, u_int flags) 2108 { 2109 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2110 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2111 struct llentry *lle, *next; 2112 int i; 2113 2114 /* 2115 * (flags & LLE_STATIC) means deleting all entries 2116 * including static ND6 entries. 2117 */ 2118 IF_AFDATA_WLOCK(llt->llt_ifp); 2119 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2120 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2121 if (IN6_ARE_MASKED_ADDR_EQUAL( 2122 &satosin6(L3_ADDR(lle))->sin6_addr, 2123 &pfx->sin6_addr, &msk->sin6_addr) && 2124 ((flags & LLE_STATIC) || 2125 !(lle->la_flags & LLE_STATIC))) { 2126 LLE_WLOCK(lle); 2127 if (callout_stop(&lle->la_timer)) 2128 LLE_REMREF(lle); 2129 llentry_free(lle); 2130 } 2131 } 2132 } 2133 IF_AFDATA_WUNLOCK(llt->llt_ifp); 2134 } 2135 2136 static int 2137 in6_lltable_rtcheck(struct ifnet *ifp, 2138 u_int flags, 2139 const struct sockaddr *l3addr) 2140 { 2141 struct rtentry *rt; 2142 char ip6buf[INET6_ADDRSTRLEN]; 2143 2144 KASSERT(l3addr->sa_family == AF_INET6, 2145 ("sin_family %d", l3addr->sa_family)); 2146 2147 /* Our local addresses are always only installed on the default FIB. */ 2148 /* XXX rtalloc1 should take a const param */ 2149 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0, 2150 RT_DEFAULT_FIB); 2151 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2152 struct ifaddr *ifa; 2153 /* 2154 * Create an ND6 cache for an IPv6 neighbor 2155 * that is not covered by our own prefix. 2156 */ 2157 /* XXX ifaof_ifpforaddr should take a const param */ 2158 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2159 if (ifa != NULL) { 2160 ifa_free(ifa); 2161 if (rt != NULL) 2162 RTFREE_LOCKED(rt); 2163 return 0; 2164 } 2165 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2166 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2167 if (rt != NULL) 2168 RTFREE_LOCKED(rt); 2169 return EINVAL; 2170 } 2171 RTFREE_LOCKED(rt); 2172 return 0; 2173 } 2174 2175 static struct llentry * 2176 in6_lltable_lookup(struct lltable *llt, u_int flags, 2177 const struct sockaddr *l3addr) 2178 { 2179 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2180 struct ifnet *ifp = llt->llt_ifp; 2181 struct llentry *lle; 2182 struct llentries *lleh; 2183 u_int hashkey; 2184 2185 IF_AFDATA_LOCK_ASSERT(ifp); 2186 KASSERT(l3addr->sa_family == AF_INET6, 2187 ("sin_family %d", l3addr->sa_family)); 2188 2189 hashkey = sin6->sin6_addr.s6_addr32[3]; 2190 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2191 LIST_FOREACH(lle, lleh, lle_next) { 2192 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2193 if (lle->la_flags & LLE_DELETED) 2194 continue; 2195 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2196 sizeof(struct in6_addr)) == 0) 2197 break; 2198 } 2199 2200 if (lle == NULL) { 2201 if (!(flags & LLE_CREATE)) 2202 return (NULL); 2203 IF_AFDATA_WLOCK_ASSERT(ifp); 2204 /* 2205 * A route that covers the given address must have 2206 * been installed 1st because we are doing a resolution, 2207 * verify this. 2208 */ 2209 if (!(flags & LLE_IFADDR) && 2210 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2211 return NULL; 2212 2213 lle = in6_lltable_new(l3addr, flags); 2214 if (lle == NULL) { 2215 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2216 return NULL; 2217 } 2218 lle->la_flags = flags & ~LLE_CREATE; 2219 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2220 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2221 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2222 } 2223 2224 lle->lle_tbl = llt; 2225 lle->lle_head = lleh; 2226 lle->la_flags |= LLE_LINKED; 2227 LIST_INSERT_HEAD(lleh, lle, lle_next); 2228 } else if (flags & LLE_DELETE) { 2229 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2230 LLE_WLOCK(lle); 2231 lle->la_flags |= LLE_DELETED; 2232 #ifdef DIAGNOSTIC 2233 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2234 #endif 2235 if ((lle->la_flags & 2236 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 2237 llentry_free(lle); 2238 else 2239 LLE_WUNLOCK(lle); 2240 } 2241 lle = (void *)-1; 2242 } 2243 if (LLE_IS_VALID(lle)) { 2244 if (flags & LLE_EXCLUSIVE) 2245 LLE_WLOCK(lle); 2246 else 2247 LLE_RLOCK(lle); 2248 } 2249 return (lle); 2250 } 2251 2252 static int 2253 in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2254 { 2255 struct ifnet *ifp = llt->llt_ifp; 2256 struct llentry *lle; 2257 /* XXX stack use */ 2258 struct { 2259 struct rt_msghdr rtm; 2260 struct sockaddr_in6 sin6; 2261 /* 2262 * ndp.c assumes that sdl is word aligned 2263 */ 2264 #ifdef __LP64__ 2265 uint32_t pad; 2266 #endif 2267 struct sockaddr_dl sdl; 2268 } ndpc; 2269 int i, error; 2270 2271 if (ifp->if_flags & IFF_LOOPBACK) 2272 return 0; 2273 2274 LLTABLE_LOCK_ASSERT(); 2275 2276 error = 0; 2277 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2278 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2279 struct sockaddr_dl *sdl; 2280 2281 /* skip deleted or invalid entries */ 2282 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2283 continue; 2284 /* Skip if jailed and not a valid IP of the prison. */ 2285 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2286 continue; 2287 /* 2288 * produce a msg made of: 2289 * struct rt_msghdr; 2290 * struct sockaddr_in6 (IPv6) 2291 * struct sockaddr_dl; 2292 */ 2293 bzero(&ndpc, sizeof(ndpc)); 2294 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2295 ndpc.rtm.rtm_version = RTM_VERSION; 2296 ndpc.rtm.rtm_type = RTM_GET; 2297 ndpc.rtm.rtm_flags = RTF_UP; 2298 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2299 ndpc.sin6.sin6_family = AF_INET6; 2300 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2301 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2302 if (V_deembed_scopeid) 2303 sa6_recoverscope(&ndpc.sin6); 2304 2305 /* publish */ 2306 if (lle->la_flags & LLE_PUB) 2307 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2308 2309 sdl = &ndpc.sdl; 2310 sdl->sdl_family = AF_LINK; 2311 sdl->sdl_len = sizeof(*sdl); 2312 sdl->sdl_alen = ifp->if_addrlen; 2313 sdl->sdl_index = ifp->if_index; 2314 sdl->sdl_type = ifp->if_type; 2315 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2316 ndpc.rtm.rtm_rmx.rmx_expire = 2317 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2318 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2319 if (lle->la_flags & LLE_STATIC) 2320 ndpc.rtm.rtm_flags |= RTF_STATIC; 2321 ndpc.rtm.rtm_index = ifp->if_index; 2322 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2323 if (error) 2324 break; 2325 } 2326 } 2327 return error; 2328 } 2329 2330 void * 2331 in6_domifattach(struct ifnet *ifp) 2332 { 2333 struct in6_ifextra *ext; 2334 2335 /* There are not IPv6-capable interfaces. */ 2336 switch (ifp->if_type) { 2337 case IFT_PFLOG: 2338 case IFT_PFSYNC: 2339 case IFT_USB: 2340 return (NULL); 2341 } 2342 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2343 bzero(ext, sizeof(*ext)); 2344 2345 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2346 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2347 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2348 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2349 2350 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2351 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2352 M_WAITOK); 2353 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2354 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2355 2356 ext->nd_ifinfo = nd6_ifattach(ifp); 2357 ext->scope6_id = scope6_ifattach(ifp); 2358 ext->lltable = lltable_init(ifp, AF_INET6); 2359 if (ext->lltable != NULL) { 2360 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2361 ext->lltable->llt_lookup = in6_lltable_lookup; 2362 ext->lltable->llt_dump = in6_lltable_dump; 2363 } 2364 2365 ext->mld_ifinfo = mld_domifattach(ifp); 2366 2367 return ext; 2368 } 2369 2370 void 2371 in6_domifdetach(struct ifnet *ifp, void *aux) 2372 { 2373 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2374 2375 mld_domifdetach(ifp); 2376 scope6_ifdetach(ext->scope6_id); 2377 nd6_ifdetach(ext->nd_ifinfo); 2378 lltable_free(ext->lltable); 2379 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2380 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2381 free(ext->in6_ifstat, M_IFADDR); 2382 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2383 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2384 free(ext->icmp6_ifstat, M_IFADDR); 2385 free(ext, M_IFADDR); 2386 } 2387 2388 /* 2389 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2390 * v4 mapped addr or v4 compat addr 2391 */ 2392 void 2393 in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2394 { 2395 2396 bzero(sin, sizeof(*sin)); 2397 sin->sin_len = sizeof(struct sockaddr_in); 2398 sin->sin_family = AF_INET; 2399 sin->sin_port = sin6->sin6_port; 2400 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2401 } 2402 2403 /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2404 void 2405 in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2406 { 2407 bzero(sin6, sizeof(*sin6)); 2408 sin6->sin6_len = sizeof(struct sockaddr_in6); 2409 sin6->sin6_family = AF_INET6; 2410 sin6->sin6_port = sin->sin_port; 2411 sin6->sin6_addr.s6_addr32[0] = 0; 2412 sin6->sin6_addr.s6_addr32[1] = 0; 2413 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2414 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2415 } 2416 2417 /* Convert sockaddr_in6 into sockaddr_in. */ 2418 void 2419 in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2420 { 2421 struct sockaddr_in *sin_p; 2422 struct sockaddr_in6 sin6; 2423 2424 /* 2425 * Save original sockaddr_in6 addr and convert it 2426 * to sockaddr_in. 2427 */ 2428 sin6 = *(struct sockaddr_in6 *)nam; 2429 sin_p = (struct sockaddr_in *)nam; 2430 in6_sin6_2_sin(sin_p, &sin6); 2431 } 2432 2433 /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2434 void 2435 in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2436 { 2437 struct sockaddr_in *sin_p; 2438 struct sockaddr_in6 *sin6_p; 2439 2440 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2441 sin_p = (struct sockaddr_in *)*nam; 2442 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2443 free(*nam, M_SONAME); 2444 *nam = (struct sockaddr *)sin6_p; 2445 } 2446