in6.c revision 284016
12966Swollman/*- 250477Speter * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 31590Srgrimes * All rights reserved. 44699Sjkh * 534706Sbde * Redistribution and use in source and binary forms, with or without 697128Sjmallett * modification, are permitted provided that the following conditions 71930Swollman * are met: 81930Swollman * 1. Redistributions of source code must retain the above copyright 9106717Smarcel * notice, this list of conditions and the following disclaimer. 10100200Swollman * 2. Redistributions in binary form must reproduce the above copyright 11100200Swollman * notice, this list of conditions and the following disclaimer in the 1296630Stjr * documentation and/or other materials provided with the distribution. 1338653Sgpalmer * 3. Neither the name of the project nor the names of its contributors 14121666Sharti * may be used to endorse or promote products derived from this software 1591706Sobrien * without specific prior written permission. 1638653Sgpalmer * 1738653Sgpalmer * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1838653Sgpalmer * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19124587Sru * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2057013Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2178562Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22108667Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23119553Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24119553Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25148677Sphk * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2638653Sgpalmer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2796845Smarkm * SUCH DAMAGE. 2838653Sgpalmer * 2938653Sgpalmer * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 30124587Sru */ 3138653Sgpalmer 3238653Sgpalmer/*- 3338653Sgpalmer * Copyright (c) 1982, 1986, 1991, 1993 3438653Sgpalmer * The Regents of the University of California. All rights reserved. 3538653Sgpalmer * 3638653Sgpalmer * Redistribution and use in source and binary forms, with or without 3738653Sgpalmer * modification, are permitted provided that the following conditions 3838653Sgpalmer * are met: 3938653Sgpalmer * 1. Redistributions of source code must retain the above copyright 4038653Sgpalmer * notice, this list of conditions and the following disclaimer. 4138653Sgpalmer * 2. Redistributions in binary form must reproduce the above copyright 4295926Stjr * notice, this list of conditions and the following disclaimer in the 4338653Sgpalmer * documentation and/or other materials provided with the distribution. 4438653Sgpalmer * 4. Neither the name of the University nor the names of its contributors 45124587Sru * may be used to endorse or promote products derived from this software 4638653Sgpalmer * without specific prior written permission. 4738653Sgpalmer * 4838653Sgpalmer * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49108439Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50109314Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5140826Sjoerg * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5238653Sgpalmer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5338653Sgpalmer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5438653Sgpalmer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5538653Sgpalmer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5638653Sgpalmer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5738653Sgpalmer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5838653Sgpalmer * SUCH DAMAGE. 5938653Sgpalmer * 6038653Sgpalmer * @(#)in.c 8.2 (Berkeley) 11/15/93 6138653Sgpalmer */ 6238653Sgpalmer 6341036Sdima#include <sys/cdefs.h> 6463499Sps__FBSDID("$FreeBSD: stable/10/sys/netinet6/in6.c 284016 2015-06-05 07:23:32Z ae $"); 6538653Sgpalmer 66103303Speter#include "opt_compat.h" 6738653Sgpalmer#include "opt_inet.h" 68101629Sjake#include "opt_inet6.h" 6938653Sgpalmer 70111204Sobrien#include <sys/param.h> 7138653Sgpalmer#include <sys/errno.h> 7265627Snectar#include <sys/jail.h> 7338653Sgpalmer#include <sys/malloc.h> 74124587Sru#include <sys/socket.h> 7538653Sgpalmer#include <sys/socketvar.h> 7638653Sgpalmer#include <sys/sockio.h> 7738653Sgpalmer#include <sys/systm.h> 7838653Sgpalmer#include <sys/priv.h> 7938653Sgpalmer#include <sys/proc.h> 8038653Sgpalmer#include <sys/time.h> 8138653Sgpalmer#include <sys/kernel.h> 8238653Sgpalmer#include <sys/syslog.h> 8338653Sgpalmer 8438653Sgpalmer#include <net/if.h> 8538653Sgpalmer#include <net/if_var.h> 8693619Sjake#include <net/if_types.h> 8738653Sgpalmer#include <net/route.h> 8838653Sgpalmer#include <net/if_dl.h> 8938653Sgpalmer#include <net/vnet.h> 9039614Sbde 9138653Sgpalmer#include <netinet/in.h> 9260789Sps#include <netinet/in_var.h> 9360789Sps#include <net/if_llatbl.h> 9460789Sps#include <netinet/if_ether.h> 95119553Sphk#include <netinet/in_systm.h> 9638653Sgpalmer#include <netinet/ip.h> 97116677Sphantom#include <netinet/in_pcb.h> 9838653Sgpalmer#include <netinet/ip_carp.h> 9938653Sgpalmer 10038653Sgpalmer#include <netinet/ip6.h> 10138653Sgpalmer#include <netinet6/ip6_var.h> 10238653Sgpalmer#include <netinet6/nd6.h> 103126701Sdes#include <netinet6/mld6_var.h> 10438653Sgpalmer#include <netinet6/ip6_mroute.h> 10538653Sgpalmer#include <netinet6/in6_ifattach.h> 10638653Sgpalmer#include <netinet6/scope6_var.h> 10738653Sgpalmer#include <netinet6/in6_pcb.h> 10838653Sgpalmer 10938653SgpalmerVNET_DECLARE(int, icmp6_nodeinfo_oldmcprefix); 11038653Sgpalmer#define V_icmp6_nodeinfo_oldmcprefix VNET(icmp6_nodeinfo_oldmcprefix) 11196845Smarkm 11238653Sgpalmer/* 11339614Sbde * Definitions of some costant IP6 addresses. 11438653Sgpalmer */ 11538653Sgpalmerconst struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 11638653Sgpalmerconst struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 11738653Sgpalmerconst struct in6_addr in6addr_nodelocal_allnodes = 11838653Sgpalmer IN6ADDR_NODELOCAL_ALLNODES_INIT; 119146107Sfjoeconst struct in6_addr in6addr_linklocal_allnodes = 12038653Sgpalmer IN6ADDR_LINKLOCAL_ALLNODES_INIT; 12139914Sdfrconst struct in6_addr in6addr_linklocal_allrouters = 122141800Sdelphij IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 12338653Sgpalmerconst struct in6_addr in6addr_linklocal_allv2routers = 124124587Sru IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 125124587Sru 12638653Sgpalmerconst struct in6_addr in6mask0 = IN6MASK0; 12797365Stjrconst struct in6_addr in6mask32 = IN6MASK32; 128124587Sruconst struct in6_addr in6mask64 = IN6MASK64; 12938653Sgpalmerconst struct in6_addr in6mask96 = IN6MASK96; 13038653Sgpalmerconst struct in6_addr in6mask128 = IN6MASK128; 13176273Sbrian 13238653Sgpalmerconst struct sockaddr_in6 sa6_any = 133135549Sdes { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 134135549Sdes 13538653Sgpalmerstatic int in6_lifaddr_ioctl(struct socket *, u_long, caddr_t, 13638653Sgpalmer struct ifnet *, struct thread *); 13738653Sgpalmerstatic int in6_ifinit(struct ifnet *, struct in6_ifaddr *, 13838653Sgpalmer struct sockaddr_in6 *, int); 13938653Sgpalmerstatic void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 14038653Sgpalmer 14138653Sgpalmerint (*faithprefix_p)(struct in6_addr *); 14297096Stjr 143127471Sgad#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 14438653Sgpalmer#define ia62ifa(ia6) (&((ia6)->ia_ifa)) 14538653Sgpalmer 14638653Sgpalmervoid 14738653Sgpalmerin6_ifaddloop(struct ifaddr *ifa) 14838653Sgpalmer{ 14938653Sgpalmer struct sockaddr_dl gateway; 150143026Strhodes struct sockaddr_in6 mask, addr; 15138653Sgpalmer struct rtentry rt; 15238653Sgpalmer struct in6_ifaddr *ia; 15338653Sgpalmer struct ifnet *ifp; 154143026Strhodes struct llentry *ln; 15538653Sgpalmer 15638653Sgpalmer ia = ifa2ia6(ifa); 15738653Sgpalmer ifp = ifa->ifa_ifp; 15838653Sgpalmer /* 15938653Sgpalmer * initialize for rtmsg generation 16038653Sgpalmer */ 16138653Sgpalmer bzero(&gateway, sizeof(gateway)); 16238653Sgpalmer gateway.sdl_len = sizeof(gateway); 16338653Sgpalmer gateway.sdl_family = AF_LINK; 164124587Sru if (nd6_need_cache(ifp) != 0) { 16545701Sdes IF_AFDATA_LOCK(ifp); 16638653Sgpalmer ifa->ifa_rtrequest = nd6_rtrequest; 16797955Sdougb ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | 16838653Sgpalmer LLE_EXCLUSIVE), (struct sockaddr *)&ia->ia_addr); 16941035Sdima IF_AFDATA_UNLOCK(ifp); 17097034Stjr if (ln != NULL) { 17138653Sgpalmer ln->la_expire = 0; /* for IPv6 this means permanent */ 17238653Sgpalmer ln->ln_state = ND6_LLINFO_REACHABLE; 173127947Skientzle 17438653Sgpalmer gateway.sdl_alen = 6; 17538653Sgpalmer memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, 176117675Smarkm sizeof(ln->ll_addr)); 17738653Sgpalmer LLE_WUNLOCK(ln); 17838653Sgpalmer } 17988277Smarkm } 18038653Sgpalmer bzero(&rt, sizeof(rt)); 18138653Sgpalmer rt.rt_gateway = (struct sockaddr *)&gateway; 18238653Sgpalmer memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 18338653Sgpalmer memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 18438653Sgpalmer rt_mask(&rt) = (struct sockaddr *)&mask; 18563437Ssheldonh rt_key(&rt) = (struct sockaddr *)&addr; 186111204Sobrien rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 18738653Sgpalmer /* Announce arrival of local address to all FIBs. */ 18838653Sgpalmer rt_newaddrmsg(RTM_ADD, ifa, 0, &rt); 18938653Sgpalmer} 190124587Sru 19138653Sgpalmervoid 19238653Sgpalmerin6_ifremloop(struct ifaddr *ifa) 19338653Sgpalmer{ 19438653Sgpalmer struct sockaddr_dl gateway; 19538653Sgpalmer struct sockaddr_in6 mask, addr; 19638653Sgpalmer struct rtentry rt0; 19738653Sgpalmer struct in6_ifaddr *ia; 198124587Sru struct ifnet *ifp; 199124587Sru 20038653Sgpalmer ia = ifa2ia6(ifa); 20138653Sgpalmer ifp = ifa->ifa_ifp; 20238653Sgpalmer memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 20397372Smarcel memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 204124587Sru lltable_prefix_free(AF_INET6, (struct sockaddr *)&addr, 20538653Sgpalmer (struct sockaddr *)&mask, LLE_STATIC); 20638653Sgpalmer 20738653Sgpalmer /* 20841062Sbde * initialize for rtmsg generation 20938653Sgpalmer */ 21038653Sgpalmer bzero(&gateway, sizeof(gateway)); 21138653Sgpalmer gateway.sdl_len = sizeof(gateway); 21238653Sgpalmer gateway.sdl_family = AF_LINK; 21399379Sjohan gateway.sdl_nlen = 0; 21438653Sgpalmer gateway.sdl_alen = ifp->if_addrlen; 21538653Sgpalmer bzero(&rt0, sizeof(rt0)); 21638653Sgpalmer rt0.rt_gateway = (struct sockaddr *)&gateway; 21738653Sgpalmer rt_mask(&rt0) = (struct sockaddr *)&mask; 21838653Sgpalmer rt_key(&rt0) = (struct sockaddr *)&addr; 21938653Sgpalmer rt0.rt_flags = RTF_HOST | RTF_STATIC; 22038653Sgpalmer /* Announce removal of local address to all FIBs. */ 221106717Smarcel rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0); 22238653Sgpalmer} 223119553Sphk 22438653Sgpalmerint 225137675Sbzin6_mask2len(struct in6_addr *mask, u_char *lim0) 226137675Sbz{ 227137675Sbz int x = 0, y; 2281590Srgrimes u_char *lim = lim0, *p; 229130394Sdwmalone 230129249Scognet /* ignore the scope_id part */ 231124587Sru if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 232124587Sru lim = (u_char *)mask + sizeof(*mask); 233124587Sru for (p = (u_char *)mask; p < lim; x++, p++) { 234139105Sru if (*p != 0xff) 235136140Sru break; 236124587Sru } 237124587Sru y = 0; 238135851Sdougb if (p < lim) { 239124587Sru for (y = 0; y < 8; y++) { 240124587Sru if ((*p & (0x80 >> y)) == 0) 241135549Sdes break; 242135549Sdes } 24353909Speter } 24453909Speter 245131768Semax /* 246131768Semax * when the limit pointer is given, do a stricter check on the 247131768Semax * remaining bits. 248131768Semax */ 249148677Sphk if (p < lim) { 250148677Sphk if (y != 0 && (*p & (0x00ff >> y)) != 0) 251148677Sphk return (-1); 252148677Sphk for (p = p + 1; p < lim; p++) 253139113Sru if (*p != 0) 254124587Sru return (-1); 255124587Sru } 256124587Sru 257124587Sru return x * 8 + y; 258141785Sdelphij} 259141789Sdelphij 260141785Sdelphij#ifdef COMPAT_FREEBSD32 261141785Sdelphijstruct in6_ndifreq32 { 262137675Sbz char ifname[IFNAMSIZ]; 263137675Sbz uint32_t ifindex; 264137675Sbz}; 265137675Sbz#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 266137675Sbz#endif 267137675Sbz 268143026Strhodesint 269143026Strhodesin6_control(struct socket *so, u_long cmd, caddr_t data, 270143026Strhodes struct ifnet *ifp, struct thread *td) 271143026Strhodes{ 272143026Strhodes struct in6_ifreq *ifr = (struct in6_ifreq *)data; 27386252Sgshapiro struct in6_ifaddr *ia = NULL; 274124587Sru struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 27586252Sgshapiro struct sockaddr_in6 *sa6; 27686252Sgshapiro int carp_attached = 0; 277124587Sru int error; 278124587Sru u_long ocmd = cmd; 279124587Sru 280129398Speter /* 281124587Sru * Compat to make pre-10.x ifconfig(8) operable. 282124587Sru */ 283124587Sru if (cmd == OSIOCAIFADDR_IN6) 284124587Sru cmd = SIOCAIFADDR_IN6; 285124587Sru 286124587Sru switch (cmd) { 287124587Sru case SIOCGETSGCNT_IN6: 288119553Sphk case SIOCGETMIFCNT_IN6: 289124587Sru /* 290124587Sru * XXX mrt_ioctl has a 3rd, unused, FIB argument in route.c. 291119553Sphk * We cannot see how that would be needed, so do not adjust the 292119553Sphk * KPI blindly; more likely should clean up the IPv4 variant. 29334554Sjb */ 294124587Sru return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 295124587Sru } 296124587Sru 29736064Sjb switch (cmd) { 29834554Sjb case SIOCAADDRCTL_POLICY: 29956279Sobrien case SIOCDADDRCTL_POLICY: 300124587Sru if (td != NULL) { 30156279Sobrien error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 30256279Sobrien if (error) 303117952Speter return (error); 304124587Sru } 305124587Sru return (in6_src_ioctl(cmd, data)); 306124587Sru } 307117952Speter 308117952Speter if (ifp == NULL) 3091590Srgrimes return (EOPNOTSUPP); 310 311 switch (cmd) { 312 case SIOCSNDFLUSH_IN6: 313 case SIOCSPFXFLUSH_IN6: 314 case SIOCSRTRFLUSH_IN6: 315 case SIOCSDEFIFACE_IN6: 316 case SIOCSIFINFO_FLAGS: 317 case SIOCSIFINFO_IN6: 318 if (td != NULL) { 319 error = priv_check(td, PRIV_NETINET_ND6); 320 if (error) 321 return (error); 322 } 323 /* FALLTHROUGH */ 324 case OSIOCGIFINFO_IN6: 325 case SIOCGIFINFO_IN6: 326 case SIOCGDRLST_IN6: 327 case SIOCGPRLST_IN6: 328 case SIOCGNBRINFO_IN6: 329 case SIOCGDEFIFACE_IN6: 330 return (nd6_ioctl(cmd, data, ifp)); 331 332#ifdef COMPAT_FREEBSD32 333 case SIOCGDEFIFACE32_IN6: 334 { 335 struct in6_ndifreq ndif; 336 struct in6_ndifreq32 *ndif32; 337 338 error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 339 ifp); 340 if (error) 341 return (error); 342 ndif32 = (struct in6_ndifreq32 *)data; 343 ndif32->ifindex = ndif.ifindex; 344 return (0); 345 } 346#endif 347 } 348 349 switch (cmd) { 350 case SIOCSIFPREFIX_IN6: 351 case SIOCDIFPREFIX_IN6: 352 case SIOCAIFPREFIX_IN6: 353 case SIOCCIFPREFIX_IN6: 354 case SIOCSGIFPREFIX_IN6: 355 case SIOCGIFPREFIX_IN6: 356 log(LOG_NOTICE, 357 "prefix ioctls are now invalidated. " 358 "please use ifconfig.\n"); 359 return (EOPNOTSUPP); 360 } 361 362 switch (cmd) { 363 case SIOCSSCOPE6: 364 if (td != NULL) { 365 error = priv_check(td, PRIV_NETINET_SCOPE6); 366 if (error) 367 return (error); 368 } 369 /* FALLTHROUGH */ 370 case SIOCGSCOPE6: 371 case SIOCGSCOPE6DEF: 372 return (scope6_ioctl(cmd, data, ifp)); 373 } 374 375 switch (cmd) { 376 case SIOCALIFADDR: 377 if (td != NULL) { 378 error = priv_check(td, PRIV_NET_ADDIFADDR); 379 if (error) 380 return (error); 381 } 382 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 383 384 case SIOCDLIFADDR: 385 if (td != NULL) { 386 error = priv_check(td, PRIV_NET_DELIFADDR); 387 if (error) 388 return (error); 389 } 390 /* FALLTHROUGH */ 391 case SIOCGLIFADDR: 392 return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 393 } 394 395 /* 396 * Find address for this interface, if it exists. 397 * 398 * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 399 * only, and used the first interface address as the target of other 400 * operations (without checking ifra_addr). This was because netinet 401 * code/API assumed at most 1 interface address per interface. 402 * Since IPv6 allows a node to assign multiple addresses 403 * on a single interface, we almost always look and check the 404 * presence of ifra_addr, and reject invalid ones here. 405 * It also decreases duplicated code among SIOC*_IN6 operations. 406 */ 407 switch (cmd) { 408 case SIOCAIFADDR_IN6: 409 case SIOCSIFPHYADDR_IN6: 410 sa6 = &ifra->ifra_addr; 411 break; 412 case SIOCSIFADDR_IN6: 413 case SIOCGIFADDR_IN6: 414 case SIOCSIFDSTADDR_IN6: 415 case SIOCSIFNETMASK_IN6: 416 case SIOCGIFDSTADDR_IN6: 417 case SIOCGIFNETMASK_IN6: 418 case SIOCDIFADDR_IN6: 419 case SIOCGIFPSRCADDR_IN6: 420 case SIOCGIFPDSTADDR_IN6: 421 case SIOCGIFAFLAG_IN6: 422 case SIOCSNDFLUSH_IN6: 423 case SIOCSPFXFLUSH_IN6: 424 case SIOCSRTRFLUSH_IN6: 425 case SIOCGIFALIFETIME_IN6: 426 case SIOCSIFALIFETIME_IN6: 427 case SIOCGIFSTAT_IN6: 428 case SIOCGIFSTAT_ICMP6: 429 sa6 = &ifr->ifr_addr; 430 break; 431 case SIOCSIFADDR: 432 case SIOCSIFBRDADDR: 433 case SIOCSIFDSTADDR: 434 case SIOCSIFNETMASK: 435 /* 436 * Although we should pass any non-INET6 ioctl requests 437 * down to driver, we filter some legacy INET requests. 438 * Drivers trust SIOCSIFADDR et al to come from an already 439 * privileged layer, and do not perform any credentials 440 * checks or input validation. 441 */ 442 return (EINVAL); 443 default: 444 sa6 = NULL; 445 break; 446 } 447 if (sa6 && sa6->sin6_family == AF_INET6) { 448 if (sa6->sin6_scope_id != 0) 449 error = sa6_embedscope(sa6, 0); 450 else 451 error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 452 if (error != 0) 453 return (error); 454 if (td != NULL && (error = prison_check_ip6(td->td_ucred, 455 &sa6->sin6_addr)) != 0) 456 return (error); 457 ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 458 } else 459 ia = NULL; 460 461 switch (cmd) { 462 case SIOCSIFADDR_IN6: 463 case SIOCSIFDSTADDR_IN6: 464 case SIOCSIFNETMASK_IN6: 465 /* 466 * Since IPv6 allows a node to assign multiple addresses 467 * on a single interface, SIOCSIFxxx ioctls are deprecated. 468 */ 469 /* we decided to obsolete this command (20000704) */ 470 error = EINVAL; 471 goto out; 472 473 case SIOCDIFADDR_IN6: 474 /* 475 * for IPv4, we look for existing in_ifaddr here to allow 476 * "ifconfig if0 delete" to remove the first IPv4 address on 477 * the interface. For IPv6, as the spec allows multiple 478 * interface address from the day one, we consider "remove the 479 * first one" semantics to be not preferable. 480 */ 481 if (ia == NULL) { 482 error = EADDRNOTAVAIL; 483 goto out; 484 } 485 /* FALLTHROUGH */ 486 case SIOCAIFADDR_IN6: 487 /* 488 * We always require users to specify a valid IPv6 address for 489 * the corresponding operation. 490 */ 491 if (ifra->ifra_addr.sin6_family != AF_INET6 || 492 ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 493 error = EAFNOSUPPORT; 494 goto out; 495 } 496 497 if (td != NULL) { 498 error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 499 PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 500 if (error) 501 goto out; 502 } 503 /* FALLTHROUGH */ 504 case SIOCGIFSTAT_IN6: 505 case SIOCGIFSTAT_ICMP6: 506 if (ifp->if_afdata[AF_INET6] == NULL) { 507 error = EPFNOSUPPORT; 508 goto out; 509 } 510 break; 511 512 case SIOCGIFADDR_IN6: 513 /* This interface is basically deprecated. use SIOCGIFCONF. */ 514 /* FALLTHROUGH */ 515 case SIOCGIFAFLAG_IN6: 516 case SIOCGIFNETMASK_IN6: 517 case SIOCGIFDSTADDR_IN6: 518 case SIOCGIFALIFETIME_IN6: 519 /* must think again about its semantics */ 520 if (ia == NULL) { 521 error = EADDRNOTAVAIL; 522 goto out; 523 } 524 break; 525 526 case SIOCSIFALIFETIME_IN6: 527 { 528 struct in6_addrlifetime *lt; 529 530 if (td != NULL) { 531 error = priv_check(td, PRIV_NETINET_ALIFETIME6); 532 if (error) 533 goto out; 534 } 535 if (ia == NULL) { 536 error = EADDRNOTAVAIL; 537 goto out; 538 } 539 /* sanity for overflow - beware unsigned */ 540 lt = &ifr->ifr_ifru.ifru_lifetime; 541 if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 542 lt->ia6t_vltime + time_uptime < time_uptime) { 543 error = EINVAL; 544 goto out; 545 } 546 if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 547 lt->ia6t_pltime + time_uptime < time_uptime) { 548 error = EINVAL; 549 goto out; 550 } 551 break; 552 } 553 } 554 555 switch (cmd) { 556 case SIOCGIFADDR_IN6: 557 ifr->ifr_addr = ia->ia_addr; 558 if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 559 goto out; 560 break; 561 562 case SIOCGIFDSTADDR_IN6: 563 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 564 error = EINVAL; 565 goto out; 566 } 567 /* 568 * XXX: should we check if ifa_dstaddr is NULL and return 569 * an error? 570 */ 571 ifr->ifr_dstaddr = ia->ia_dstaddr; 572 if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 573 goto out; 574 break; 575 576 case SIOCGIFNETMASK_IN6: 577 ifr->ifr_addr = ia->ia_prefixmask; 578 break; 579 580 case SIOCGIFAFLAG_IN6: 581 ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 582 break; 583 584 case SIOCGIFSTAT_IN6: 585 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 586 ifp->if_afdata[AF_INET6])->in6_ifstat, 587 &ifr->ifr_ifru.ifru_stat, 588 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 589 break; 590 591 case SIOCGIFSTAT_ICMP6: 592 COUNTER_ARRAY_COPY(((struct in6_ifextra *) 593 ifp->if_afdata[AF_INET6])->icmp6_ifstat, 594 &ifr->ifr_ifru.ifru_icmp6stat, 595 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 596 break; 597 598 case SIOCGIFALIFETIME_IN6: 599 ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 600 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 601 time_t maxexpire; 602 struct in6_addrlifetime *retlt = 603 &ifr->ifr_ifru.ifru_lifetime; 604 605 /* 606 * XXX: adjust expiration time assuming time_t is 607 * signed. 608 */ 609 maxexpire = (-1) & 610 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 611 if (ia->ia6_lifetime.ia6t_vltime < 612 maxexpire - ia->ia6_updatetime) { 613 retlt->ia6t_expire = ia->ia6_updatetime + 614 ia->ia6_lifetime.ia6t_vltime; 615 } else 616 retlt->ia6t_expire = maxexpire; 617 } 618 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 619 time_t maxexpire; 620 struct in6_addrlifetime *retlt = 621 &ifr->ifr_ifru.ifru_lifetime; 622 623 /* 624 * XXX: adjust expiration time assuming time_t is 625 * signed. 626 */ 627 maxexpire = (-1) & 628 ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 629 if (ia->ia6_lifetime.ia6t_pltime < 630 maxexpire - ia->ia6_updatetime) { 631 retlt->ia6t_preferred = ia->ia6_updatetime + 632 ia->ia6_lifetime.ia6t_pltime; 633 } else 634 retlt->ia6t_preferred = maxexpire; 635 } 636 break; 637 638 case SIOCSIFALIFETIME_IN6: 639 ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 640 /* for sanity */ 641 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 642 ia->ia6_lifetime.ia6t_expire = 643 time_uptime + ia->ia6_lifetime.ia6t_vltime; 644 } else 645 ia->ia6_lifetime.ia6t_expire = 0; 646 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 647 ia->ia6_lifetime.ia6t_preferred = 648 time_uptime + ia->ia6_lifetime.ia6t_pltime; 649 } else 650 ia->ia6_lifetime.ia6t_preferred = 0; 651 break; 652 653 case SIOCAIFADDR_IN6: 654 { 655 int i; 656 struct nd_prefixctl pr0; 657 struct nd_prefix *pr; 658 659 /* 660 * first, make or update the interface address structure, 661 * and link it to the list. 662 */ 663 if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 664 goto out; 665 if (ia != NULL) 666 ifa_free(&ia->ia_ifa); 667 if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 668 == NULL) { 669 /* 670 * this can happen when the user specify the 0 valid 671 * lifetime. 672 */ 673 break; 674 } 675 676 if (cmd == ocmd && ifra->ifra_vhid > 0) { 677 if (carp_attach_p != NULL) 678 error = (*carp_attach_p)(&ia->ia_ifa, 679 ifra->ifra_vhid); 680 else 681 error = EPROTONOSUPPORT; 682 if (error) 683 goto out; 684 else 685 carp_attached = 1; 686 } 687 688 /* 689 * then, make the prefix on-link on the interface. 690 * XXX: we'd rather create the prefix before the address, but 691 * we need at least one address to install the corresponding 692 * interface route, so we configure the address first. 693 */ 694 695 /* 696 * convert mask to prefix length (prefixmask has already 697 * been validated in in6_update_ifa(). 698 */ 699 bzero(&pr0, sizeof(pr0)); 700 pr0.ndpr_ifp = ifp; 701 pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 702 NULL); 703 if (pr0.ndpr_plen == 128) { 704 break; /* we don't need to install a host route. */ 705 } 706 pr0.ndpr_prefix = ifra->ifra_addr; 707 /* apply the mask for safety. */ 708 for (i = 0; i < 4; i++) { 709 pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 710 ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 711 } 712 /* 713 * XXX: since we don't have an API to set prefix (not address) 714 * lifetimes, we just use the same lifetimes as addresses. 715 * The (temporarily) installed lifetimes can be overridden by 716 * later advertised RAs (when accept_rtadv is non 0), which is 717 * an intended behavior. 718 */ 719 pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 720 pr0.ndpr_raf_auto = 721 ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 722 pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 723 pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 724 725 /* add the prefix if not yet. */ 726 if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 727 /* 728 * nd6_prelist_add will install the corresponding 729 * interface route. 730 */ 731 if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) { 732 if (carp_attached) 733 (*carp_detach_p)(&ia->ia_ifa); 734 goto out; 735 } 736 if (pr == NULL) { 737 if (carp_attached) 738 (*carp_detach_p)(&ia->ia_ifa); 739 log(LOG_ERR, "nd6_prelist_add succeeded but " 740 "no prefix\n"); 741 error = EINVAL; 742 goto out; 743 } 744 } 745 746 /* relate the address to the prefix */ 747 if (ia->ia6_ndpr == NULL) { 748 ia->ia6_ndpr = pr; 749 pr->ndpr_refcnt++; 750 751 /* 752 * If this is the first autoconf address from the 753 * prefix, create a temporary address as well 754 * (when required). 755 */ 756 if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 757 V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 758 int e; 759 if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 760 log(LOG_NOTICE, "in6_control: failed " 761 "to create a temporary address, " 762 "errno=%d\n", e); 763 } 764 } 765 } 766 767 /* 768 * this might affect the status of autoconfigured addresses, 769 * that is, this address might make other addresses detached. 770 */ 771 pfxlist_onlink_check(); 772 if (error == 0 && ia) { 773 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 774 /* 775 * Try to clear the flag when a new 776 * IPv6 address is added onto an 777 * IFDISABLED interface and it 778 * succeeds. 779 */ 780 struct in6_ndireq nd; 781 782 memset(&nd, 0, sizeof(nd)); 783 nd.ndi.flags = ND_IFINFO(ifp)->flags; 784 nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 785 if (nd6_ioctl(SIOCSIFINFO_FLAGS, 786 (caddr_t)&nd, ifp) < 0) 787 log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 788 "SIOCSIFINFO_FLAGS for -ifdisabled " 789 "failed."); 790 /* 791 * Ignore failure of clearing the flag 792 * intentionally. The failure means 793 * address duplication was detected. 794 */ 795 } 796 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 797 } 798 break; 799 } 800 801 case SIOCDIFADDR_IN6: 802 { 803 struct nd_prefix *pr; 804 805 /* 806 * If the address being deleted is the only one that owns 807 * the corresponding prefix, expire the prefix as well. 808 * XXX: theoretically, we don't have to worry about such 809 * relationship, since we separate the address management 810 * and the prefix management. We do this, however, to provide 811 * as much backward compatibility as possible in terms of 812 * the ioctl operation. 813 * Note that in6_purgeaddr() will decrement ndpr_refcnt. 814 */ 815 pr = ia->ia6_ndpr; 816 in6_purgeaddr(&ia->ia_ifa); 817 if (pr && pr->ndpr_refcnt == 0) 818 prelist_remove(pr); 819 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 820 break; 821 } 822 823 default: 824 if (ifp->if_ioctl == NULL) { 825 error = EOPNOTSUPP; 826 goto out; 827 } 828 error = (*ifp->if_ioctl)(ifp, cmd, data); 829 goto out; 830 } 831 832 error = 0; 833out: 834 if (ia != NULL) 835 ifa_free(&ia->ia_ifa); 836 return (error); 837} 838 839 840/* 841 * Join necessary multicast groups. Factored out from in6_update_ifa(). 842 * This entire work should only be done once, for the default FIB. 843 */ 844static int 845in6_update_ifa_join_mc(struct ifnet *ifp, struct in6_aliasreq *ifra, 846 struct in6_ifaddr *ia, int flags, struct in6_multi **in6m_sol) 847{ 848 char ip6buf[INET6_ADDRSTRLEN]; 849 struct sockaddr_in6 mltaddr, mltmask; 850 struct in6_addr llsol; 851 struct in6_multi_mship *imm; 852 struct rtentry *rt; 853 int delay, error; 854 855 KASSERT(in6m_sol != NULL, ("%s: in6m_sol is NULL", __func__)); 856 857 /* Join solicited multicast addr for new host id. */ 858 bzero(&llsol, sizeof(struct in6_addr)); 859 llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 860 llsol.s6_addr32[1] = 0; 861 llsol.s6_addr32[2] = htonl(1); 862 llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 863 llsol.s6_addr8[12] = 0xff; 864 if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 865 /* XXX: should not happen */ 866 log(LOG_ERR, "%s: in6_setscope failed\n", __func__); 867 goto cleanup; 868 } 869 delay = 0; 870 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 871 /* 872 * We need a random delay for DAD on the address being 873 * configured. It also means delaying transmission of the 874 * corresponding MLD report to avoid report collision. 875 * [RFC 4861, Section 6.3.7] 876 */ 877 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 878 } 879 imm = in6_joingroup(ifp, &llsol, &error, delay); 880 if (imm == NULL) { 881 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 882 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, &llsol), 883 if_name(ifp), error)); 884 goto cleanup; 885 } 886 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 887 *in6m_sol = imm->i6mm_maddr; 888 889 bzero(&mltmask, sizeof(mltmask)); 890 mltmask.sin6_len = sizeof(struct sockaddr_in6); 891 mltmask.sin6_family = AF_INET6; 892 mltmask.sin6_addr = in6mask32; 893#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 894 895 /* 896 * Join link-local all-nodes address. 897 */ 898 bzero(&mltaddr, sizeof(mltaddr)); 899 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 900 mltaddr.sin6_family = AF_INET6; 901 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 902 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 903 goto cleanup; /* XXX: should not fail */ 904 905 /* 906 * XXX: do we really need this automatic routes? We should probably 907 * reconsider this stuff. Most applications actually do not need the 908 * routes, since they usually specify the outgoing interface. 909 */ 910 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 911 if (rt != NULL) { 912 /* XXX: only works in !SCOPEDROUTING case. */ 913 if (memcmp(&mltaddr.sin6_addr, 914 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 915 MLTMASK_LEN)) { 916 RTFREE_LOCKED(rt); 917 rt = NULL; 918 } 919 } 920 if (rt == NULL) { 921 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 922 (struct sockaddr *)&ia->ia_addr, 923 (struct sockaddr *)&mltmask, RTF_UP, 924 (struct rtentry **)0, RT_DEFAULT_FIB); 925 if (error) 926 goto cleanup; 927 } else 928 RTFREE_LOCKED(rt); 929 930 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 931 if (imm == NULL) { 932 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 933 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 934 &mltaddr.sin6_addr), if_name(ifp), error)); 935 goto cleanup; 936 } 937 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 938 939 /* 940 * Join node information group address. 941 */ 942 delay = 0; 943 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 944 /* 945 * The spec does not say anything about delay for this group, 946 * but the same logic should apply. 947 */ 948 delay = arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz); 949 } 950 if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 951 /* XXX jinmei */ 952 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 953 if (imm == NULL) 954 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 955 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 956 &mltaddr.sin6_addr), if_name(ifp), error)); 957 /* XXX not very fatal, go on... */ 958 else 959 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 960 } 961 if (V_icmp6_nodeinfo_oldmcprefix && 962 in6_nigroup_oldmcprefix(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 963 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, delay); 964 if (imm == NULL) 965 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 966 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 967 &mltaddr.sin6_addr), if_name(ifp), error)); 968 /* XXX not very fatal, go on... */ 969 else 970 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 971 } 972 973 /* 974 * Join interface-local all-nodes address. 975 * (ff01::1%ifN, and ff01::%ifN/32) 976 */ 977 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 978 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 979 goto cleanup; /* XXX: should not fail */ 980 /* XXX: again, do we really need the route? */ 981 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 982 if (rt != NULL) { 983 if (memcmp(&mltaddr.sin6_addr, 984 &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 985 MLTMASK_LEN)) { 986 RTFREE_LOCKED(rt); 987 rt = NULL; 988 } 989 } 990 if (rt == NULL) { 991 error = in6_rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 992 (struct sockaddr *)&ia->ia_addr, 993 (struct sockaddr *)&mltmask, RTF_UP, 994 (struct rtentry **)0, RT_DEFAULT_FIB); 995 if (error) 996 goto cleanup; 997 } else 998 RTFREE_LOCKED(rt); 999 1000 imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1001 if (imm == NULL) { 1002 nd6log((LOG_WARNING, "%s: addmulti failed for %s on %s " 1003 "(errno=%d)\n", __func__, ip6_sprintf(ip6buf, 1004 &mltaddr.sin6_addr), if_name(ifp), error)); 1005 goto cleanup; 1006 } 1007 LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1008#undef MLTMASK_LEN 1009 1010cleanup: 1011 return (error); 1012} 1013 1014/* 1015 * Update parameters of an IPv6 interface address. 1016 * If necessary, a new entry is created and linked into address chains. 1017 * This function is separated from in6_control(). 1018 */ 1019int 1020in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 1021 struct in6_ifaddr *ia, int flags) 1022{ 1023 int error = 0, hostIsNew = 0, plen = -1; 1024 struct sockaddr_in6 dst6; 1025 struct in6_addrlifetime *lt; 1026 struct in6_multi *in6m_sol; 1027 int delay; 1028 char ip6buf[INET6_ADDRSTRLEN]; 1029 1030 /* Validate parameters */ 1031 if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 1032 return (EINVAL); 1033 1034 /* 1035 * The destination address for a p2p link must have a family 1036 * of AF_UNSPEC or AF_INET6. 1037 */ 1038 if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 1039 ifra->ifra_dstaddr.sin6_family != AF_INET6 && 1040 ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 1041 return (EAFNOSUPPORT); 1042 /* 1043 * validate ifra_prefixmask. don't check sin6_family, netmask 1044 * does not carry fields other than sin6_len. 1045 */ 1046 if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 1047 return (EINVAL); 1048 /* 1049 * Because the IPv6 address architecture is classless, we require 1050 * users to specify a (non 0) prefix length (mask) for a new address. 1051 * We also require the prefix (when specified) mask is valid, and thus 1052 * reject a non-consecutive mask. 1053 */ 1054 if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 1055 return (EINVAL); 1056 if (ifra->ifra_prefixmask.sin6_len != 0) { 1057 plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 1058 (u_char *)&ifra->ifra_prefixmask + 1059 ifra->ifra_prefixmask.sin6_len); 1060 if (plen <= 0) 1061 return (EINVAL); 1062 } else { 1063 /* 1064 * In this case, ia must not be NULL. We just use its prefix 1065 * length. 1066 */ 1067 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1068 } 1069 /* 1070 * If the destination address on a p2p interface is specified, 1071 * and the address is a scoped one, validate/set the scope 1072 * zone identifier. 1073 */ 1074 dst6 = ifra->ifra_dstaddr; 1075 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 1076 (dst6.sin6_family == AF_INET6)) { 1077 struct in6_addr in6_tmp; 1078 u_int32_t zoneid; 1079 1080 in6_tmp = dst6.sin6_addr; 1081 if (in6_setscope(&in6_tmp, ifp, &zoneid)) 1082 return (EINVAL); /* XXX: should be impossible */ 1083 1084 if (dst6.sin6_scope_id != 0) { 1085 if (dst6.sin6_scope_id != zoneid) 1086 return (EINVAL); 1087 } else /* user omit to specify the ID. */ 1088 dst6.sin6_scope_id = zoneid; 1089 1090 /* convert into the internal form */ 1091 if (sa6_embedscope(&dst6, 0)) 1092 return (EINVAL); /* XXX: should be impossible */ 1093 } 1094 /* 1095 * The destination address can be specified only for a p2p or a 1096 * loopback interface. If specified, the corresponding prefix length 1097 * must be 128. 1098 */ 1099 if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 1100 if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 1101 /* XXX: noisy message */ 1102 nd6log((LOG_INFO, "in6_update_ifa: a destination can " 1103 "be specified for a p2p or a loopback IF only\n")); 1104 return (EINVAL); 1105 } 1106 if (plen != 128) { 1107 nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 1108 "be 128 when dstaddr is specified\n")); 1109 return (EINVAL); 1110 } 1111 } 1112 /* lifetime consistency check */ 1113 lt = &ifra->ifra_lifetime; 1114 if (lt->ia6t_pltime > lt->ia6t_vltime) 1115 return (EINVAL); 1116 if (lt->ia6t_vltime == 0) { 1117 /* 1118 * the following log might be noisy, but this is a typical 1119 * configuration mistake or a tool's bug. 1120 */ 1121 nd6log((LOG_INFO, 1122 "in6_update_ifa: valid lifetime is 0 for %s\n", 1123 ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 1124 1125 if (ia == NULL) 1126 return (0); /* there's nothing to do */ 1127 } 1128 1129 /* 1130 * If this is a new address, allocate a new ifaddr and link it 1131 * into chains. 1132 */ 1133 if (ia == NULL) { 1134 hostIsNew = 1; 1135 /* 1136 * When in6_update_ifa() is called in a process of a received 1137 * RA, it is called under an interrupt context. So, we should 1138 * call malloc with M_NOWAIT. 1139 */ 1140 ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 1141 M_NOWAIT); 1142 if (ia == NULL) 1143 return (ENOBUFS); 1144 bzero((caddr_t)ia, sizeof(*ia)); 1145 ifa_init(&ia->ia_ifa); 1146 LIST_INIT(&ia->ia6_memberships); 1147 /* Initialize the address and masks, and put time stamp */ 1148 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 1149 ia->ia_addr.sin6_family = AF_INET6; 1150 ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 1151 ia->ia6_createtime = time_uptime; 1152 if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 1153 /* 1154 * XXX: some functions expect that ifa_dstaddr is not 1155 * NULL for p2p interfaces. 1156 */ 1157 ia->ia_ifa.ifa_dstaddr = 1158 (struct sockaddr *)&ia->ia_dstaddr; 1159 } else { 1160 ia->ia_ifa.ifa_dstaddr = NULL; 1161 } 1162 ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 1163 ia->ia_ifp = ifp; 1164 ifa_ref(&ia->ia_ifa); /* if_addrhead */ 1165 IF_ADDR_WLOCK(ifp); 1166 TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1167 IF_ADDR_WUNLOCK(ifp); 1168 1169 ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 1170 IN6_IFADDR_WLOCK(); 1171 TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 1172 LIST_INSERT_HEAD(IN6ADDR_HASH(&ifra->ifra_addr.sin6_addr), 1173 ia, ia6_hash); 1174 IN6_IFADDR_WUNLOCK(); 1175 } 1176 1177 /* update timestamp */ 1178 ia->ia6_updatetime = time_uptime; 1179 1180 /* set prefix mask */ 1181 if (ifra->ifra_prefixmask.sin6_len) { 1182 /* 1183 * We prohibit changing the prefix length of an existing 1184 * address, because 1185 * + such an operation should be rare in IPv6, and 1186 * + the operation would confuse prefix management. 1187 */ 1188 if (ia->ia_prefixmask.sin6_len && 1189 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 1190 nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 1191 " existing (%s) address should not be changed\n", 1192 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1193 error = EINVAL; 1194 goto unlink; 1195 } 1196 ia->ia_prefixmask = ifra->ifra_prefixmask; 1197 ia->ia_prefixmask.sin6_family = AF_INET6; 1198 } 1199 1200 /* 1201 * If a new destination address is specified, scrub the old one and 1202 * install the new destination. Note that the interface must be 1203 * p2p or loopback (see the check above.) 1204 */ 1205 if (dst6.sin6_family == AF_INET6 && 1206 !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 1207 int e; 1208 1209 if ((ia->ia_flags & IFA_ROUTE) != 0 && 1210 (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 1211 nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 1212 "a route to the old destination: %s\n", 1213 ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 1214 /* proceed anyway... */ 1215 } else 1216 ia->ia_flags &= ~IFA_ROUTE; 1217 ia->ia_dstaddr = dst6; 1218 } 1219 1220 /* 1221 * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 1222 * to see if the address is deprecated or invalidated, but initialize 1223 * these members for applications. 1224 */ 1225 ia->ia6_lifetime = ifra->ifra_lifetime; 1226 if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 1227 ia->ia6_lifetime.ia6t_expire = 1228 time_uptime + ia->ia6_lifetime.ia6t_vltime; 1229 } else 1230 ia->ia6_lifetime.ia6t_expire = 0; 1231 if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 1232 ia->ia6_lifetime.ia6t_preferred = 1233 time_uptime + ia->ia6_lifetime.ia6t_pltime; 1234 } else 1235 ia->ia6_lifetime.ia6t_preferred = 0; 1236 1237 /* reset the interface and routing table appropriately. */ 1238 if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 1239 goto unlink; 1240 1241 /* 1242 * configure address flags. 1243 */ 1244 ia->ia6_flags = ifra->ifra_flags; 1245 /* 1246 * backward compatibility - if IN6_IFF_DEPRECATED is set from the 1247 * userland, make it deprecated. 1248 */ 1249 if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 1250 ia->ia6_lifetime.ia6t_pltime = 0; 1251 ia->ia6_lifetime.ia6t_preferred = time_uptime; 1252 } 1253 /* 1254 * Make the address tentative before joining multicast addresses, 1255 * so that corresponding MLD responses would not have a tentative 1256 * source address. 1257 */ 1258 ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 1259 if (hostIsNew && in6if_do_dad(ifp)) 1260 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1261 1262 /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 1263 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 1264 ia->ia6_flags |= IN6_IFF_TENTATIVE; 1265 1266 /* 1267 * We are done if we have simply modified an existing address. 1268 */ 1269 if (!hostIsNew) 1270 return (error); 1271 1272 /* 1273 * Beyond this point, we should call in6_purgeaddr upon an error, 1274 * not just go to unlink. 1275 */ 1276 1277 /* Join necessary multicast groups. */ 1278 in6m_sol = NULL; 1279 if ((ifp->if_flags & IFF_MULTICAST) != 0) { 1280 error = in6_update_ifa_join_mc(ifp, ifra, ia, flags, &in6m_sol); 1281 if (error) 1282 goto cleanup; 1283 } 1284 1285 /* 1286 * Perform DAD, if needed. 1287 * XXX It may be of use, if we can administratively disable DAD. 1288 */ 1289 if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1290 (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1291 { 1292 int mindelay, maxdelay; 1293 1294 delay = 0; 1295 if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1296 /* 1297 * We need to impose a delay before sending an NS 1298 * for DAD. Check if we also needed a delay for the 1299 * corresponding MLD message. If we did, the delay 1300 * should be larger than the MLD delay (this could be 1301 * relaxed a bit, but this simple logic is at least 1302 * safe). 1303 * XXX: Break data hiding guidelines and look at 1304 * state for the solicited multicast group. 1305 */ 1306 mindelay = 0; 1307 if (in6m_sol != NULL && 1308 in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1309 mindelay = in6m_sol->in6m_timer; 1310 } 1311 maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1312 if (maxdelay - mindelay == 0) 1313 delay = 0; 1314 else { 1315 delay = 1316 (arc4random() % (maxdelay - mindelay)) + 1317 mindelay; 1318 } 1319 } 1320 nd6_dad_start((struct ifaddr *)ia, delay); 1321 } 1322 1323 KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1324 ifa_free(&ia->ia_ifa); 1325 return (error); 1326 1327 unlink: 1328 /* 1329 * XXX: if a change of an existing address failed, keep the entry 1330 * anyway. 1331 */ 1332 if (hostIsNew) { 1333 in6_unlink_ifa(ia, ifp); 1334 ifa_free(&ia->ia_ifa); 1335 } 1336 return (error); 1337 1338 cleanup: 1339 KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1340 ifa_free(&ia->ia_ifa); 1341 in6_purgeaddr(&ia->ia_ifa); 1342 return error; 1343} 1344 1345/* 1346 * Leave multicast groups. Factored out from in6_purgeaddr(). 1347 * This entire work should only be done once, for the default FIB. 1348 */ 1349static int 1350in6_purgeaddr_mc(struct ifnet *ifp, struct in6_ifaddr *ia, struct ifaddr *ifa0) 1351{ 1352 struct sockaddr_in6 mltaddr, mltmask; 1353 struct in6_multi_mship *imm; 1354 struct rtentry *rt; 1355 struct sockaddr_in6 sin6; 1356 int error; 1357 1358 /* 1359 * Leave from multicast groups we have joined for the interface. 1360 */ 1361 while ((imm = LIST_FIRST(&ia->ia6_memberships)) != NULL) { 1362 LIST_REMOVE(imm, i6mm_chain); 1363 in6_leavegroup(imm); 1364 } 1365 1366 /* 1367 * Remove the link-local all-nodes address. 1368 */ 1369 bzero(&mltmask, sizeof(mltmask)); 1370 mltmask.sin6_len = sizeof(struct sockaddr_in6); 1371 mltmask.sin6_family = AF_INET6; 1372 mltmask.sin6_addr = in6mask32; 1373 1374 bzero(&mltaddr, sizeof(mltaddr)); 1375 mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1376 mltaddr.sin6_family = AF_INET6; 1377 mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1378 1379 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1380 return (error); 1381 1382 /* 1383 * As for the mltaddr above, proactively prepare the sin6 to avoid 1384 * rtentry un- and re-locking. 1385 */ 1386 if (ifa0 != NULL) { 1387 bzero(&sin6, sizeof(sin6)); 1388 sin6.sin6_len = sizeof(sin6); 1389 sin6.sin6_family = AF_INET6; 1390 memcpy(&sin6.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1391 sizeof(sin6.sin6_addr)); 1392 error = in6_setscope(&sin6.sin6_addr, ifa0->ifa_ifp, NULL); 1393 if (error != 0) 1394 return (error); 1395 } 1396 1397 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1398 if (rt != NULL && rt->rt_gateway != NULL && 1399 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1400 &ia->ia_addr.sin6_addr, 1401 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1402 /* 1403 * If no more IPv6 address exists on this interface then 1404 * remove the multicast address route. 1405 */ 1406 if (ifa0 == NULL) { 1407 memcpy(&mltaddr.sin6_addr, 1408 &satosin6(rt_key(rt))->sin6_addr, 1409 sizeof(mltaddr.sin6_addr)); 1410 RTFREE_LOCKED(rt); 1411 error = in6_rtrequest(RTM_DELETE, 1412 (struct sockaddr *)&mltaddr, 1413 (struct sockaddr *)&ia->ia_addr, 1414 (struct sockaddr *)&mltmask, RTF_UP, 1415 (struct rtentry **)0, RT_DEFAULT_FIB); 1416 if (error) 1417 log(LOG_INFO, "%s: link-local all-nodes " 1418 "multicast address deletion error\n", 1419 __func__); 1420 } else { 1421 /* 1422 * Replace the gateway of the route. 1423 */ 1424 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1425 RTFREE_LOCKED(rt); 1426 } 1427 } else { 1428 if (rt != NULL) 1429 RTFREE_LOCKED(rt); 1430 } 1431 1432 /* 1433 * Remove the node-local all-nodes address. 1434 */ 1435 mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1436 if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 0) 1437 return (error); 1438 1439 rt = in6_rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL, RT_DEFAULT_FIB); 1440 if (rt != NULL && rt->rt_gateway != NULL && 1441 (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1442 &ia->ia_addr.sin6_addr, 1443 sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1444 /* 1445 * If no more IPv6 address exists on this interface then 1446 * remove the multicast address route. 1447 */ 1448 if (ifa0 == NULL) { 1449 memcpy(&mltaddr.sin6_addr, 1450 &satosin6(rt_key(rt))->sin6_addr, 1451 sizeof(mltaddr.sin6_addr)); 1452 1453 RTFREE_LOCKED(rt); 1454 error = in6_rtrequest(RTM_DELETE, 1455 (struct sockaddr *)&mltaddr, 1456 (struct sockaddr *)&ia->ia_addr, 1457 (struct sockaddr *)&mltmask, RTF_UP, 1458 (struct rtentry **)0, RT_DEFAULT_FIB); 1459 if (error) 1460 log(LOG_INFO, "%s: node-local all-nodes" 1461 "multicast address deletion error\n", 1462 __func__); 1463 } else { 1464 /* 1465 * Replace the gateway of the route. 1466 */ 1467 memcpy(rt->rt_gateway, &sin6, sizeof(sin6)); 1468 RTFREE_LOCKED(rt); 1469 } 1470 } else { 1471 if (rt != NULL) 1472 RTFREE_LOCKED(rt); 1473 } 1474 1475 return (0); 1476} 1477 1478void 1479in6_purgeaddr(struct ifaddr *ifa) 1480{ 1481 struct ifnet *ifp = ifa->ifa_ifp; 1482 struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1483 int plen, error; 1484 struct ifaddr *ifa0; 1485 1486 if (ifa->ifa_carp) 1487 (*carp_detach_p)(ifa); 1488 1489 /* 1490 * find another IPv6 address as the gateway for the 1491 * link-local and node-local all-nodes multicast 1492 * address routes 1493 */ 1494 IF_ADDR_RLOCK(ifp); 1495 TAILQ_FOREACH(ifa0, &ifp->if_addrhead, ifa_link) { 1496 if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1497 memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1498 &ia->ia_addr.sin6_addr, sizeof(struct in6_addr)) == 0) 1499 continue; 1500 else 1501 break; 1502 } 1503 if (ifa0 != NULL) 1504 ifa_ref(ifa0); 1505 IF_ADDR_RUNLOCK(ifp); 1506 1507 /* 1508 * Remove the loopback route to the interface address. 1509 * The check for the current setting of "nd6_useloopback" 1510 * is not needed. 1511 */ 1512 if (ia->ia_flags & IFA_RTSELF) { 1513 error = ifa_del_loopback_route((struct ifaddr *)ia, 1514 (struct sockaddr *)&ia->ia_addr); 1515 if (error == 0) 1516 ia->ia_flags &= ~IFA_RTSELF; 1517 } 1518 1519 /* stop DAD processing */ 1520 nd6_dad_stop(ifa); 1521 1522 /* Remove local address entry from lltable. */ 1523 in6_ifremloop(ifa); 1524 1525 /* Leave multicast groups. */ 1526 error = in6_purgeaddr_mc(ifp, ia, ifa0); 1527 1528 if (ifa0 != NULL) 1529 ifa_free(ifa0); 1530 1531 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1532 if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1533 error = rtinit(&(ia->ia_ifa), RTM_DELETE, ia->ia_flags | 1534 (ia->ia_dstaddr.sin6_family == AF_INET6) ? RTF_HOST : 0); 1535 if (error != 0) 1536 log(LOG_INFO, "%s: err=%d, destination address delete " 1537 "failed\n", __func__, error); 1538 ia->ia_flags &= ~IFA_ROUTE; 1539 } 1540 1541 in6_unlink_ifa(ia, ifp); 1542} 1543 1544static void 1545in6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 1546{ 1547 char ip6buf[INET6_ADDRSTRLEN]; 1548 1549 IF_ADDR_WLOCK(ifp); 1550 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1551 IF_ADDR_WUNLOCK(ifp); 1552 ifa_free(&ia->ia_ifa); /* if_addrhead */ 1553 1554 /* 1555 * Defer the release of what might be the last reference to the 1556 * in6_ifaddr so that it can't be freed before the remainder of the 1557 * cleanup. 1558 */ 1559 IN6_IFADDR_WLOCK(); 1560 TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1561 LIST_REMOVE(ia, ia6_hash); 1562 IN6_IFADDR_WUNLOCK(); 1563 1564 /* 1565 * Release the reference to the base prefix. There should be a 1566 * positive reference. 1567 */ 1568 if (ia->ia6_ndpr == NULL) { 1569 nd6log((LOG_NOTICE, 1570 "in6_unlink_ifa: autoconf'ed address " 1571 "%s has no prefix\n", ip6_sprintf(ip6buf, IA6_IN6(ia)))); 1572 } else { 1573 ia->ia6_ndpr->ndpr_refcnt--; 1574 ia->ia6_ndpr = NULL; 1575 } 1576 1577 /* 1578 * Also, if the address being removed is autoconf'ed, call 1579 * pfxlist_onlink_check() since the release might affect the status of 1580 * other (detached) addresses. 1581 */ 1582 if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 1583 pfxlist_onlink_check(); 1584 } 1585 ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 1586} 1587 1588void 1589in6_purgeif(struct ifnet *ifp) 1590{ 1591 struct ifaddr *ifa, *nifa; 1592 1593 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 1594 if (ifa->ifa_addr->sa_family != AF_INET6) 1595 continue; 1596 in6_purgeaddr(ifa); 1597 } 1598 1599 in6_ifdetach(ifp); 1600} 1601 1602/* 1603 * SIOC[GAD]LIFADDR. 1604 * SIOCGLIFADDR: get first address. (?) 1605 * SIOCGLIFADDR with IFLR_PREFIX: 1606 * get first address that matches the specified prefix. 1607 * SIOCALIFADDR: add the specified address. 1608 * SIOCALIFADDR with IFLR_PREFIX: 1609 * add the specified prefix, filling hostid part from 1610 * the first link-local address. prefixlen must be <= 64. 1611 * SIOCDLIFADDR: delete the specified address. 1612 * SIOCDLIFADDR with IFLR_PREFIX: 1613 * delete the first address that matches the specified prefix. 1614 * return values: 1615 * EINVAL on invalid parameters 1616 * EADDRNOTAVAIL on prefix match failed/specified address not found 1617 * other values may be returned from in6_ioctl() 1618 * 1619 * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 1620 * this is to accomodate address naming scheme other than RFC2374, 1621 * in the future. 1622 * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 1623 * address encoding scheme. (see figure on page 8) 1624 */ 1625static int 1626in6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1627 struct ifnet *ifp, struct thread *td) 1628{ 1629 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 1630 struct ifaddr *ifa; 1631 struct sockaddr *sa; 1632 1633 /* sanity checks */ 1634 if (!data || !ifp) { 1635 panic("invalid argument to in6_lifaddr_ioctl"); 1636 /* NOTREACHED */ 1637 } 1638 1639 switch (cmd) { 1640 case SIOCGLIFADDR: 1641 /* address must be specified on GET with IFLR_PREFIX */ 1642 if ((iflr->flags & IFLR_PREFIX) == 0) 1643 break; 1644 /* FALLTHROUGH */ 1645 case SIOCALIFADDR: 1646 case SIOCDLIFADDR: 1647 /* address must be specified on ADD and DELETE */ 1648 sa = (struct sockaddr *)&iflr->addr; 1649 if (sa->sa_family != AF_INET6) 1650 return EINVAL; 1651 if (sa->sa_len != sizeof(struct sockaddr_in6)) 1652 return EINVAL; 1653 /* XXX need improvement */ 1654 sa = (struct sockaddr *)&iflr->dstaddr; 1655 if (sa->sa_family && sa->sa_family != AF_INET6) 1656 return EINVAL; 1657 if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 1658 return EINVAL; 1659 break; 1660 default: /* shouldn't happen */ 1661#if 0 1662 panic("invalid cmd to in6_lifaddr_ioctl"); 1663 /* NOTREACHED */ 1664#else 1665 return EOPNOTSUPP; 1666#endif 1667 } 1668 if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 1669 return EINVAL; 1670 1671 switch (cmd) { 1672 case SIOCALIFADDR: 1673 { 1674 struct in6_aliasreq ifra; 1675 struct in6_addr *hostid = NULL; 1676 int prefixlen; 1677 1678 ifa = NULL; 1679 if ((iflr->flags & IFLR_PREFIX) != 0) { 1680 struct sockaddr_in6 *sin6; 1681 1682 /* 1683 * hostid is to fill in the hostid part of the 1684 * address. hostid points to the first link-local 1685 * address attached to the interface. 1686 */ 1687 ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 1688 if (!ifa) 1689 return EADDRNOTAVAIL; 1690 hostid = IFA_IN6(ifa); 1691 1692 /* prefixlen must be <= 64. */ 1693 if (64 < iflr->prefixlen) { 1694 if (ifa != NULL) 1695 ifa_free(ifa); 1696 return EINVAL; 1697 } 1698 prefixlen = iflr->prefixlen; 1699 1700 /* hostid part must be zero. */ 1701 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1702 if (sin6->sin6_addr.s6_addr32[2] != 0 || 1703 sin6->sin6_addr.s6_addr32[3] != 0) { 1704 if (ifa != NULL) 1705 ifa_free(ifa); 1706 return EINVAL; 1707 } 1708 } else 1709 prefixlen = iflr->prefixlen; 1710 1711 /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 1712 bzero(&ifra, sizeof(ifra)); 1713 bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 1714 1715 bcopy(&iflr->addr, &ifra.ifra_addr, 1716 ((struct sockaddr *)&iflr->addr)->sa_len); 1717 if (hostid) { 1718 /* fill in hostid part */ 1719 ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1720 hostid->s6_addr32[2]; 1721 ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1722 hostid->s6_addr32[3]; 1723 } 1724 1725 if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 1726 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1727 ((struct sockaddr *)&iflr->dstaddr)->sa_len); 1728 if (hostid) { 1729 ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1730 hostid->s6_addr32[2]; 1731 ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1732 hostid->s6_addr32[3]; 1733 } 1734 } 1735 if (ifa != NULL) 1736 ifa_free(ifa); 1737 1738 ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1739 in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 1740 1741 ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 1742 return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 1743 } 1744 case SIOCGLIFADDR: 1745 case SIOCDLIFADDR: 1746 { 1747 struct in6_ifaddr *ia; 1748 struct in6_addr mask, candidate, match; 1749 struct sockaddr_in6 *sin6; 1750 int cmp; 1751 1752 bzero(&mask, sizeof(mask)); 1753 if (iflr->flags & IFLR_PREFIX) { 1754 /* lookup a prefix rather than address. */ 1755 in6_prefixlen2mask(&mask, iflr->prefixlen); 1756 1757 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1758 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1759 match.s6_addr32[0] &= mask.s6_addr32[0]; 1760 match.s6_addr32[1] &= mask.s6_addr32[1]; 1761 match.s6_addr32[2] &= mask.s6_addr32[2]; 1762 match.s6_addr32[3] &= mask.s6_addr32[3]; 1763 1764 /* if you set extra bits, that's wrong */ 1765 if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 1766 return EINVAL; 1767 1768 cmp = 1; 1769 } else { 1770 if (cmd == SIOCGLIFADDR) { 1771 /* on getting an address, take the 1st match */ 1772 cmp = 0; /* XXX */ 1773 } else { 1774 /* on deleting an address, do exact match */ 1775 in6_prefixlen2mask(&mask, 128); 1776 sin6 = (struct sockaddr_in6 *)&iflr->addr; 1777 bcopy(&sin6->sin6_addr, &match, sizeof(match)); 1778 1779 cmp = 1; 1780 } 1781 } 1782 1783 IF_ADDR_RLOCK(ifp); 1784 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1785 if (ifa->ifa_addr->sa_family != AF_INET6) 1786 continue; 1787 if (!cmp) 1788 break; 1789 1790 /* 1791 * XXX: this is adhoc, but is necessary to allow 1792 * a user to specify fe80::/64 (not /10) for a 1793 * link-local address. 1794 */ 1795 bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1796 in6_clearscope(&candidate); 1797 candidate.s6_addr32[0] &= mask.s6_addr32[0]; 1798 candidate.s6_addr32[1] &= mask.s6_addr32[1]; 1799 candidate.s6_addr32[2] &= mask.s6_addr32[2]; 1800 candidate.s6_addr32[3] &= mask.s6_addr32[3]; 1801 if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 1802 break; 1803 } 1804 if (ifa != NULL) 1805 ifa_ref(ifa); 1806 IF_ADDR_RUNLOCK(ifp); 1807 if (!ifa) 1808 return EADDRNOTAVAIL; 1809 ia = ifa2ia6(ifa); 1810 1811 if (cmd == SIOCGLIFADDR) { 1812 int error; 1813 1814 /* fill in the if_laddrreq structure */ 1815 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1816 error = sa6_recoverscope( 1817 (struct sockaddr_in6 *)&iflr->addr); 1818 if (error != 0) { 1819 ifa_free(ifa); 1820 return (error); 1821 } 1822 1823 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1824 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1825 ia->ia_dstaddr.sin6_len); 1826 error = sa6_recoverscope( 1827 (struct sockaddr_in6 *)&iflr->dstaddr); 1828 if (error != 0) { 1829 ifa_free(ifa); 1830 return (error); 1831 } 1832 } else 1833 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 1834 1835 iflr->prefixlen = 1836 in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 1837 1838 iflr->flags = ia->ia6_flags; /* XXX */ 1839 ifa_free(ifa); 1840 1841 return 0; 1842 } else { 1843 struct in6_aliasreq ifra; 1844 1845 /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 1846 bzero(&ifra, sizeof(ifra)); 1847 bcopy(iflr->iflr_name, ifra.ifra_name, 1848 sizeof(ifra.ifra_name)); 1849 1850 bcopy(&ia->ia_addr, &ifra.ifra_addr, 1851 ia->ia_addr.sin6_len); 1852 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 1853 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1854 ia->ia_dstaddr.sin6_len); 1855 } else { 1856 bzero(&ifra.ifra_dstaddr, 1857 sizeof(ifra.ifra_dstaddr)); 1858 } 1859 bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1860 ia->ia_prefixmask.sin6_len); 1861 1862 ifra.ifra_flags = ia->ia6_flags; 1863 ifa_free(ifa); 1864 return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1865 ifp, td); 1866 } 1867 } 1868 } 1869 1870 return EOPNOTSUPP; /* just for safety */ 1871} 1872 1873/* 1874 * Initialize an interface's IPv6 address and routing table entry. 1875 */ 1876static int 1877in6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1878 struct sockaddr_in6 *sin6, int newhost) 1879{ 1880 int error = 0, plen, ifacount = 0; 1881 struct ifaddr *ifa; 1882 1883 /* 1884 * Give the interface a chance to initialize 1885 * if this is its first address, 1886 * and to validate the address if necessary. 1887 */ 1888 IF_ADDR_RLOCK(ifp); 1889 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1890 if (ifa->ifa_addr->sa_family != AF_INET6) 1891 continue; 1892 ifacount++; 1893 } 1894 IF_ADDR_RUNLOCK(ifp); 1895 1896 ia->ia_addr = *sin6; 1897 1898 if (ifacount <= 1 && ifp->if_ioctl) { 1899 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1900 if (error) 1901 return (error); 1902 } 1903 1904 ia->ia_ifa.ifa_metric = ifp->if_metric; 1905 1906 /* we could do in(6)_socktrim here, but just omit it at this moment. */ 1907 1908 /* 1909 * Special case: 1910 * If a new destination address is specified for a point-to-point 1911 * interface, install a route to the destination as an interface 1912 * direct route. 1913 * XXX: the logic below rejects assigning multiple addresses on a p2p 1914 * interface that share the same destination. 1915 */ 1916 plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1917 if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1918 ia->ia_dstaddr.sin6_family == AF_INET6) { 1919 int rtflags = RTF_UP | RTF_HOST; 1920 error = rtinit(&ia->ia_ifa, RTM_ADD, ia->ia_flags | rtflags); 1921 if (error) 1922 return (error); 1923 ia->ia_flags |= IFA_ROUTE; 1924 /* 1925 * Handle the case for ::1 . 1926 */ 1927 if (ifp->if_flags & IFF_LOOPBACK) 1928 ia->ia_flags |= IFA_RTSELF; 1929 } 1930 1931 /* 1932 * add a loopback route to self 1933 */ 1934 if (!(ia->ia_flags & IFA_RTSELF) && V_nd6_useloopback) { 1935 error = ifa_add_loopback_route((struct ifaddr *)ia, 1936 (struct sockaddr *)&ia->ia_addr); 1937 if (error == 0) 1938 ia->ia_flags |= IFA_RTSELF; 1939 } 1940 1941 /* Add local address to lltable, if necessary (ex. on p2p link). */ 1942 if (newhost) 1943 in6_ifaddloop(&(ia->ia_ifa)); 1944 1945 return (error); 1946} 1947 1948/* 1949 * Find an IPv6 interface link-local address specific to an interface. 1950 * ifaddr is returned referenced. 1951 */ 1952struct in6_ifaddr * 1953in6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 1954{ 1955 struct ifaddr *ifa; 1956 1957 IF_ADDR_RLOCK(ifp); 1958 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1959 if (ifa->ifa_addr->sa_family != AF_INET6) 1960 continue; 1961 if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 1962 if ((((struct in6_ifaddr *)ifa)->ia6_flags & 1963 ignoreflags) != 0) 1964 continue; 1965 ifa_ref(ifa); 1966 break; 1967 } 1968 } 1969 IF_ADDR_RUNLOCK(ifp); 1970 1971 return ((struct in6_ifaddr *)ifa); 1972} 1973 1974 1975/* 1976 * find the internet address corresponding to a given interface and address. 1977 * ifaddr is returned referenced. 1978 */ 1979struct in6_ifaddr * 1980in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 1981{ 1982 struct ifaddr *ifa; 1983 1984 IF_ADDR_RLOCK(ifp); 1985 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1986 if (ifa->ifa_addr->sa_family != AF_INET6) 1987 continue; 1988 if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1989 ifa_ref(ifa); 1990 break; 1991 } 1992 } 1993 IF_ADDR_RUNLOCK(ifp); 1994 1995 return ((struct in6_ifaddr *)ifa); 1996} 1997 1998/* 1999 * Find a link-local scoped address on ifp and return it if any. 2000 */ 2001struct in6_ifaddr * 2002in6ifa_llaonifp(struct ifnet *ifp) 2003{ 2004 struct sockaddr_in6 *sin6; 2005 struct ifaddr *ifa; 2006 2007 if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 2008 return (NULL); 2009 if_addr_rlock(ifp); 2010 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2011 if (ifa->ifa_addr->sa_family != AF_INET6) 2012 continue; 2013 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 2014 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) || 2015 IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr) || 2016 IN6_IS_ADDR_MC_NODELOCAL(&sin6->sin6_addr)) 2017 break; 2018 } 2019 if_addr_runlock(ifp); 2020 2021 return ((struct in6_ifaddr *)ifa); 2022} 2023 2024/* 2025 * Convert IP6 address to printable (loggable) representation. Caller 2026 * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 2027 */ 2028static char digits[] = "0123456789abcdef"; 2029char * 2030ip6_sprintf(char *ip6buf, const struct in6_addr *addr) 2031{ 2032 int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 2033 char *cp; 2034 const u_int16_t *a = (const u_int16_t *)addr; 2035 const u_int8_t *d; 2036 int dcolon = 0, zero = 0; 2037 2038 cp = ip6buf; 2039 2040 for (i = 0; i < 8; i++) { 2041 if (*(a + i) == 0) { 2042 cnt++; 2043 if (cnt == 1) 2044 idx = i; 2045 } 2046 else if (maxcnt < cnt) { 2047 maxcnt = cnt; 2048 index = idx; 2049 cnt = 0; 2050 } 2051 } 2052 if (maxcnt < cnt) { 2053 maxcnt = cnt; 2054 index = idx; 2055 } 2056 2057 for (i = 0; i < 8; i++) { 2058 if (dcolon == 1) { 2059 if (*a == 0) { 2060 if (i == 7) 2061 *cp++ = ':'; 2062 a++; 2063 continue; 2064 } else 2065 dcolon = 2; 2066 } 2067 if (*a == 0) { 2068 if (dcolon == 0 && *(a + 1) == 0 && i == index) { 2069 if (i == 0) 2070 *cp++ = ':'; 2071 *cp++ = ':'; 2072 dcolon = 1; 2073 } else { 2074 *cp++ = '0'; 2075 *cp++ = ':'; 2076 } 2077 a++; 2078 continue; 2079 } 2080 d = (const u_char *)a; 2081 /* Try to eliminate leading zeros in printout like in :0001. */ 2082 zero = 1; 2083 *cp = digits[*d >> 4]; 2084 if (*cp != '0') { 2085 zero = 0; 2086 cp++; 2087 } 2088 *cp = digits[*d++ & 0xf]; 2089 if (zero == 0 || (*cp != '0')) { 2090 zero = 0; 2091 cp++; 2092 } 2093 *cp = digits[*d >> 4]; 2094 if (zero == 0 || (*cp != '0')) { 2095 zero = 0; 2096 cp++; 2097 } 2098 *cp++ = digits[*d & 0xf]; 2099 *cp++ = ':'; 2100 a++; 2101 } 2102 *--cp = '\0'; 2103 return (ip6buf); 2104} 2105 2106int 2107in6_localaddr(struct in6_addr *in6) 2108{ 2109 struct in6_ifaddr *ia; 2110 2111 if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 2112 return 1; 2113 2114 IN6_IFADDR_RLOCK(); 2115 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 2116 if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 2117 &ia->ia_prefixmask.sin6_addr)) { 2118 IN6_IFADDR_RUNLOCK(); 2119 return 1; 2120 } 2121 } 2122 IN6_IFADDR_RUNLOCK(); 2123 2124 return (0); 2125} 2126 2127/* 2128 * Return 1 if an internet address is for the local host and configured 2129 * on one of its interfaces. 2130 */ 2131int 2132in6_localip(struct in6_addr *in6) 2133{ 2134 struct in6_ifaddr *ia; 2135 2136 IN6_IFADDR_RLOCK(); 2137 LIST_FOREACH(ia, IN6ADDR_HASH(in6), ia6_hash) { 2138 if (IN6_ARE_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr)) { 2139 IN6_IFADDR_RUNLOCK(); 2140 return (1); 2141 } 2142 } 2143 IN6_IFADDR_RUNLOCK(); 2144 return (0); 2145} 2146 2147int 2148in6_is_addr_deprecated(struct sockaddr_in6 *sa6) 2149{ 2150 struct in6_ifaddr *ia; 2151 2152 IN6_IFADDR_RLOCK(); 2153 LIST_FOREACH(ia, IN6ADDR_HASH(&sa6->sin6_addr), ia6_hash) { 2154 if (IN6_ARE_ADDR_EQUAL(IA6_IN6(ia), &sa6->sin6_addr)) { 2155 if (ia->ia6_flags & IN6_IFF_DEPRECATED) { 2156 IN6_IFADDR_RUNLOCK(); 2157 return (1); /* true */ 2158 } 2159 break; 2160 } 2161 } 2162 IN6_IFADDR_RUNLOCK(); 2163 2164 return (0); /* false */ 2165} 2166 2167/* 2168 * return length of part which dst and src are equal 2169 * hard coding... 2170 */ 2171int 2172in6_matchlen(struct in6_addr *src, struct in6_addr *dst) 2173{ 2174 int match = 0; 2175 u_char *s = (u_char *)src, *d = (u_char *)dst; 2176 u_char *lim = s + 16, r; 2177 2178 while (s < lim) 2179 if ((r = (*d++ ^ *s++)) != 0) { 2180 while (r < 128) { 2181 match++; 2182 r <<= 1; 2183 } 2184 break; 2185 } else 2186 match += 8; 2187 return match; 2188} 2189 2190/* XXX: to be scope conscious */ 2191int 2192in6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 2193{ 2194 int bytelen, bitlen; 2195 2196 /* sanity check */ 2197 if (0 > len || len > 128) { 2198 log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 2199 len); 2200 return (0); 2201 } 2202 2203 bytelen = len / 8; 2204 bitlen = len % 8; 2205 2206 if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2207 return (0); 2208 if (bitlen != 0 && 2209 p1->s6_addr[bytelen] >> (8 - bitlen) != 2210 p2->s6_addr[bytelen] >> (8 - bitlen)) 2211 return (0); 2212 2213 return (1); 2214} 2215 2216void 2217in6_prefixlen2mask(struct in6_addr *maskp, int len) 2218{ 2219 u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 2220 int bytelen, bitlen, i; 2221 2222 /* sanity check */ 2223 if (0 > len || len > 128) { 2224 log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 2225 len); 2226 return; 2227 } 2228 2229 bzero(maskp, sizeof(*maskp)); 2230 bytelen = len / 8; 2231 bitlen = len % 8; 2232 for (i = 0; i < bytelen; i++) 2233 maskp->s6_addr[i] = 0xff; 2234 if (bitlen) 2235 maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 2236} 2237 2238/* 2239 * return the best address out of the same scope. if no address was 2240 * found, return the first valid address from designated IF. 2241 */ 2242struct in6_ifaddr * 2243in6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 2244{ 2245 int dst_scope = in6_addrscope(dst), blen = -1, tlen; 2246 struct ifaddr *ifa; 2247 struct in6_ifaddr *besta = 0; 2248 struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 2249 2250 dep[0] = dep[1] = NULL; 2251 2252 /* 2253 * We first look for addresses in the same scope. 2254 * If there is one, return it. 2255 * If two or more, return one which matches the dst longest. 2256 * If none, return one of global addresses assigned other ifs. 2257 */ 2258 IF_ADDR_RLOCK(ifp); 2259 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2260 if (ifa->ifa_addr->sa_family != AF_INET6) 2261 continue; 2262 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2263 continue; /* XXX: is there any case to allow anycast? */ 2264 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2265 continue; /* don't use this interface */ 2266 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2267 continue; 2268 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2269 if (V_ip6_use_deprecated) 2270 dep[0] = (struct in6_ifaddr *)ifa; 2271 continue; 2272 } 2273 2274 if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 2275 /* 2276 * call in6_matchlen() as few as possible 2277 */ 2278 if (besta) { 2279 if (blen == -1) 2280 blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 2281 tlen = in6_matchlen(IFA_IN6(ifa), dst); 2282 if (tlen > blen) { 2283 blen = tlen; 2284 besta = (struct in6_ifaddr *)ifa; 2285 } 2286 } else 2287 besta = (struct in6_ifaddr *)ifa; 2288 } 2289 } 2290 if (besta) { 2291 ifa_ref(&besta->ia_ifa); 2292 IF_ADDR_RUNLOCK(ifp); 2293 return (besta); 2294 } 2295 2296 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2297 if (ifa->ifa_addr->sa_family != AF_INET6) 2298 continue; 2299 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 2300 continue; /* XXX: is there any case to allow anycast? */ 2301 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 2302 continue; /* don't use this interface */ 2303 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 2304 continue; 2305 if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2306 if (V_ip6_use_deprecated) 2307 dep[1] = (struct in6_ifaddr *)ifa; 2308 continue; 2309 } 2310 2311 if (ifa != NULL) 2312 ifa_ref(ifa); 2313 IF_ADDR_RUNLOCK(ifp); 2314 return (struct in6_ifaddr *)ifa; 2315 } 2316 2317 /* use the last-resort values, that are, deprecated addresses */ 2318 if (dep[0]) { 2319 ifa_ref((struct ifaddr *)dep[0]); 2320 IF_ADDR_RUNLOCK(ifp); 2321 return dep[0]; 2322 } 2323 if (dep[1]) { 2324 ifa_ref((struct ifaddr *)dep[1]); 2325 IF_ADDR_RUNLOCK(ifp); 2326 return dep[1]; 2327 } 2328 2329 IF_ADDR_RUNLOCK(ifp); 2330 return NULL; 2331} 2332 2333/* 2334 * perform DAD when interface becomes IFF_UP. 2335 */ 2336void 2337in6_if_up(struct ifnet *ifp) 2338{ 2339 struct ifaddr *ifa; 2340 struct in6_ifaddr *ia; 2341 2342 IF_ADDR_RLOCK(ifp); 2343 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2344 if (ifa->ifa_addr->sa_family != AF_INET6) 2345 continue; 2346 ia = (struct in6_ifaddr *)ifa; 2347 if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2348 /* 2349 * The TENTATIVE flag was likely set by hand 2350 * beforehand, implicitly indicating the need for DAD. 2351 * We may be able to skip the random delay in this 2352 * case, but we impose delays just in case. 2353 */ 2354 nd6_dad_start(ifa, 2355 arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2356 } 2357 } 2358 IF_ADDR_RUNLOCK(ifp); 2359 2360 /* 2361 * special cases, like 6to4, are handled in in6_ifattach 2362 */ 2363 in6_ifattach(ifp, NULL); 2364} 2365 2366int 2367in6if_do_dad(struct ifnet *ifp) 2368{ 2369 if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2370 return (0); 2371 2372 if ((ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) || 2373 (ND_IFINFO(ifp)->flags & ND6_IFF_NO_DAD)) 2374 return (0); 2375 2376 switch (ifp->if_type) { 2377#ifdef IFT_DUMMY 2378 case IFT_DUMMY: 2379#endif 2380 case IFT_FAITH: 2381 /* 2382 * These interfaces do not have the IFF_LOOPBACK flag, 2383 * but loop packets back. We do not have to do DAD on such 2384 * interfaces. We should even omit it, because loop-backed 2385 * NS would confuse the DAD procedure. 2386 */ 2387 return (0); 2388 default: 2389 /* 2390 * Our DAD routine requires the interface up and running. 2391 * However, some interfaces can be up before the RUNNING 2392 * status. Additionaly, users may try to assign addresses 2393 * before the interface becomes up (or running). 2394 * We simply skip DAD in such a case as a work around. 2395 * XXX: we should rather mark "tentative" on such addresses, 2396 * and do DAD after the interface becomes ready. 2397 */ 2398 if (!((ifp->if_flags & IFF_UP) && 2399 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2400 return (0); 2401 2402 return (1); 2403 } 2404} 2405 2406/* 2407 * Calculate max IPv6 MTU through all the interfaces and store it 2408 * to in6_maxmtu. 2409 */ 2410void 2411in6_setmaxmtu(void) 2412{ 2413 unsigned long maxmtu = 0; 2414 struct ifnet *ifp; 2415 2416 IFNET_RLOCK_NOSLEEP(); 2417 TAILQ_FOREACH(ifp, &V_ifnet, if_list) { 2418 /* this function can be called during ifnet initialization */ 2419 if (!ifp->if_afdata[AF_INET6]) 2420 continue; 2421 if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2422 IN6_LINKMTU(ifp) > maxmtu) 2423 maxmtu = IN6_LINKMTU(ifp); 2424 } 2425 IFNET_RUNLOCK_NOSLEEP(); 2426 if (maxmtu) /* update only when maxmtu is positive */ 2427 V_in6_maxmtu = maxmtu; 2428} 2429 2430/* 2431 * Provide the length of interface identifiers to be used for the link attached 2432 * to the given interface. The length should be defined in "IPv6 over 2433 * xxx-link" document. Note that address architecture might also define 2434 * the length for a particular set of address prefixes, regardless of the 2435 * link type. As clarified in rfc2462bis, those two definitions should be 2436 * consistent, and those really are as of August 2004. 2437 */ 2438int 2439in6_if2idlen(struct ifnet *ifp) 2440{ 2441 switch (ifp->if_type) { 2442 case IFT_ETHER: /* RFC2464 */ 2443#ifdef IFT_PROPVIRTUAL 2444 case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2445#endif 2446#ifdef IFT_L2VLAN 2447 case IFT_L2VLAN: /* ditto */ 2448#endif 2449#ifdef IFT_IEEE80211 2450 case IFT_IEEE80211: /* ditto */ 2451#endif 2452#ifdef IFT_MIP 2453 case IFT_MIP: /* ditto */ 2454#endif 2455 case IFT_INFINIBAND: 2456 return (64); 2457 case IFT_FDDI: /* RFC2467 */ 2458 return (64); 2459 case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2460 return (64); 2461 case IFT_PPP: /* RFC2472 */ 2462 return (64); 2463 case IFT_ARCNET: /* RFC2497 */ 2464 return (64); 2465 case IFT_FRELAY: /* RFC2590 */ 2466 return (64); 2467 case IFT_IEEE1394: /* RFC3146 */ 2468 return (64); 2469 case IFT_GIF: 2470 return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2471 case IFT_LOOP: 2472 return (64); /* XXX: is this really correct? */ 2473 default: 2474 /* 2475 * Unknown link type: 2476 * It might be controversial to use the today's common constant 2477 * of 64 for these cases unconditionally. For full compliance, 2478 * we should return an error in this case. On the other hand, 2479 * if we simply miss the standard for the link type or a new 2480 * standard is defined for a new link type, the IFID length 2481 * is very likely to be the common constant. As a compromise, 2482 * we always use the constant, but make an explicit notice 2483 * indicating the "unknown" case. 2484 */ 2485 printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2486 return (64); 2487 } 2488} 2489 2490#include <sys/sysctl.h> 2491 2492struct in6_llentry { 2493 struct llentry base; 2494 struct sockaddr_in6 l3_addr6; 2495}; 2496 2497/* 2498 * Deletes an address from the address table. 2499 * This function is called by the timer functions 2500 * such as arptimer() and nd6_llinfo_timer(), and 2501 * the caller does the locking. 2502 */ 2503static void 2504in6_lltable_free(struct lltable *llt, struct llentry *lle) 2505{ 2506 LLE_WUNLOCK(lle); 2507 LLE_LOCK_DESTROY(lle); 2508 free(lle, M_LLTABLE); 2509} 2510 2511static struct llentry * 2512in6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2513{ 2514 struct in6_llentry *lle; 2515 2516 lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 2517 if (lle == NULL) /* NB: caller generates msg */ 2518 return NULL; 2519 2520 lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2521 lle->base.lle_refcnt = 1; 2522 lle->base.lle_free = in6_lltable_free; 2523 LLE_LOCK_INIT(&lle->base); 2524 callout_init(&lle->base.ln_timer_ch, 1); 2525 2526 return (&lle->base); 2527} 2528 2529static void 2530in6_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 2531 const struct sockaddr *mask, u_int flags) 2532{ 2533 const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2534 const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2535 struct llentry *lle, *next; 2536 int i; 2537 2538 /* 2539 * (flags & LLE_STATIC) means deleting all entries 2540 * including static ND6 entries. 2541 */ 2542 IF_AFDATA_WLOCK(llt->llt_ifp); 2543 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2544 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2545 if (IN6_ARE_MASKED_ADDR_EQUAL( 2546 &satosin6(L3_ADDR(lle))->sin6_addr, 2547 &pfx->sin6_addr, &msk->sin6_addr) && 2548 ((flags & LLE_STATIC) || 2549 !(lle->la_flags & LLE_STATIC))) { 2550 LLE_WLOCK(lle); 2551 if (callout_stop(&lle->la_timer)) 2552 LLE_REMREF(lle); 2553 llentry_free(lle); 2554 } 2555 } 2556 } 2557 IF_AFDATA_WUNLOCK(llt->llt_ifp); 2558} 2559 2560static int 2561in6_lltable_rtcheck(struct ifnet *ifp, 2562 u_int flags, 2563 const struct sockaddr *l3addr) 2564{ 2565 struct rtentry *rt; 2566 char ip6buf[INET6_ADDRSTRLEN]; 2567 2568 KASSERT(l3addr->sa_family == AF_INET6, 2569 ("sin_family %d", l3addr->sa_family)); 2570 2571 /* Our local addresses are always only installed on the default FIB. */ 2572 /* XXX rtalloc1 should take a const param */ 2573 rt = in6_rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0, 2574 RT_DEFAULT_FIB); 2575 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2576 struct ifaddr *ifa; 2577 /* 2578 * Create an ND6 cache for an IPv6 neighbor 2579 * that is not covered by our own prefix. 2580 */ 2581 /* XXX ifaof_ifpforaddr should take a const param */ 2582 ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2583 if (ifa != NULL) { 2584 ifa_free(ifa); 2585 if (rt != NULL) 2586 RTFREE_LOCKED(rt); 2587 return 0; 2588 } 2589 log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2590 ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2591 if (rt != NULL) 2592 RTFREE_LOCKED(rt); 2593 return EINVAL; 2594 } 2595 RTFREE_LOCKED(rt); 2596 return 0; 2597} 2598 2599static struct llentry * 2600in6_lltable_lookup(struct lltable *llt, u_int flags, 2601 const struct sockaddr *l3addr) 2602{ 2603 const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2604 struct ifnet *ifp = llt->llt_ifp; 2605 struct llentry *lle; 2606 struct llentries *lleh; 2607 u_int hashkey; 2608 2609 IF_AFDATA_LOCK_ASSERT(ifp); 2610 KASSERT(l3addr->sa_family == AF_INET6, 2611 ("sin_family %d", l3addr->sa_family)); 2612 2613 hashkey = sin6->sin6_addr.s6_addr32[3]; 2614 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2615 LIST_FOREACH(lle, lleh, lle_next) { 2616 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2617 if (lle->la_flags & LLE_DELETED) 2618 continue; 2619 if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2620 sizeof(struct in6_addr)) == 0) 2621 break; 2622 } 2623 2624 if (lle == NULL) { 2625 if (!(flags & LLE_CREATE)) 2626 return (NULL); 2627 IF_AFDATA_WLOCK_ASSERT(ifp); 2628 /* 2629 * A route that covers the given address must have 2630 * been installed 1st because we are doing a resolution, 2631 * verify this. 2632 */ 2633 if (!(flags & LLE_IFADDR) && 2634 in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2635 return NULL; 2636 2637 lle = in6_lltable_new(l3addr, flags); 2638 if (lle == NULL) { 2639 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2640 return NULL; 2641 } 2642 lle->la_flags = flags & ~LLE_CREATE; 2643 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2644 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2645 lle->la_flags |= (LLE_VALID | LLE_STATIC); 2646 } 2647 2648 lle->lle_tbl = llt; 2649 lle->lle_head = lleh; 2650 lle->la_flags |= LLE_LINKED; 2651 LIST_INSERT_HEAD(lleh, lle, lle_next); 2652 } else if (flags & LLE_DELETE) { 2653 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2654 LLE_WLOCK(lle); 2655 lle->la_flags |= LLE_DELETED; 2656#ifdef DIAGNOSTIC 2657 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2658#endif 2659 if ((lle->la_flags & 2660 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 2661 llentry_free(lle); 2662 else 2663 LLE_WUNLOCK(lle); 2664 } 2665 lle = (void *)-1; 2666 } 2667 if (LLE_IS_VALID(lle)) { 2668 if (flags & LLE_EXCLUSIVE) 2669 LLE_WLOCK(lle); 2670 else 2671 LLE_RLOCK(lle); 2672 } 2673 return (lle); 2674} 2675 2676static int 2677in6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2678{ 2679 struct ifnet *ifp = llt->llt_ifp; 2680 struct llentry *lle; 2681 /* XXX stack use */ 2682 struct { 2683 struct rt_msghdr rtm; 2684 struct sockaddr_in6 sin6; 2685 /* 2686 * ndp.c assumes that sdl is word aligned 2687 */ 2688#ifdef __LP64__ 2689 uint32_t pad; 2690#endif 2691 struct sockaddr_dl sdl; 2692 } ndpc; 2693 int i, error; 2694 2695 if (ifp->if_flags & IFF_LOOPBACK) 2696 return 0; 2697 2698 LLTABLE_LOCK_ASSERT(); 2699 2700 error = 0; 2701 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2702 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2703 struct sockaddr_dl *sdl; 2704 2705 /* skip deleted or invalid entries */ 2706 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2707 continue; 2708 /* Skip if jailed and not a valid IP of the prison. */ 2709 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2710 continue; 2711 /* 2712 * produce a msg made of: 2713 * struct rt_msghdr; 2714 * struct sockaddr_in6 (IPv6) 2715 * struct sockaddr_dl; 2716 */ 2717 bzero(&ndpc, sizeof(ndpc)); 2718 ndpc.rtm.rtm_msglen = sizeof(ndpc); 2719 ndpc.rtm.rtm_version = RTM_VERSION; 2720 ndpc.rtm.rtm_type = RTM_GET; 2721 ndpc.rtm.rtm_flags = RTF_UP; 2722 ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2723 ndpc.sin6.sin6_family = AF_INET6; 2724 ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2725 bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2726 if (V_deembed_scopeid) 2727 sa6_recoverscope(&ndpc.sin6); 2728 2729 /* publish */ 2730 if (lle->la_flags & LLE_PUB) 2731 ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2732 2733 sdl = &ndpc.sdl; 2734 sdl->sdl_family = AF_LINK; 2735 sdl->sdl_len = sizeof(*sdl); 2736 sdl->sdl_alen = ifp->if_addrlen; 2737 sdl->sdl_index = ifp->if_index; 2738 sdl->sdl_type = ifp->if_type; 2739 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2740 ndpc.rtm.rtm_rmx.rmx_expire = 2741 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2742 ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2743 if (lle->la_flags & LLE_STATIC) 2744 ndpc.rtm.rtm_flags |= RTF_STATIC; 2745 ndpc.rtm.rtm_index = ifp->if_index; 2746 error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2747 if (error) 2748 break; 2749 } 2750 } 2751 return error; 2752} 2753 2754void * 2755in6_domifattach(struct ifnet *ifp) 2756{ 2757 struct in6_ifextra *ext; 2758 2759 /* There are not IPv6-capable interfaces. */ 2760 switch (ifp->if_type) { 2761 case IFT_PFLOG: 2762 case IFT_PFSYNC: 2763 case IFT_USB: 2764 return (NULL); 2765 } 2766 ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2767 bzero(ext, sizeof(*ext)); 2768 2769 ext->in6_ifstat = malloc(sizeof(counter_u64_t) * 2770 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_IFADDR, M_WAITOK); 2771 COUNTER_ARRAY_ALLOC(ext->in6_ifstat, 2772 sizeof(struct in6_ifstat) / sizeof(uint64_t), M_WAITOK); 2773 2774 ext->icmp6_ifstat = malloc(sizeof(counter_u64_t) * 2775 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_IFADDR, 2776 M_WAITOK); 2777 COUNTER_ARRAY_ALLOC(ext->icmp6_ifstat, 2778 sizeof(struct icmp6_ifstat) / sizeof(uint64_t), M_WAITOK); 2779 2780 ext->nd_ifinfo = nd6_ifattach(ifp); 2781 ext->scope6_id = scope6_ifattach(ifp); 2782 ext->lltable = lltable_init(ifp, AF_INET6); 2783 if (ext->lltable != NULL) { 2784 ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2785 ext->lltable->llt_lookup = in6_lltable_lookup; 2786 ext->lltable->llt_dump = in6_lltable_dump; 2787 } 2788 2789 ext->mld_ifinfo = mld_domifattach(ifp); 2790 2791 return ext; 2792} 2793 2794void 2795in6_domifdetach(struct ifnet *ifp, void *aux) 2796{ 2797 struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2798 2799 mld_domifdetach(ifp); 2800 scope6_ifdetach(ext->scope6_id); 2801 nd6_ifdetach(ext->nd_ifinfo); 2802 lltable_free(ext->lltable); 2803 COUNTER_ARRAY_FREE(ext->in6_ifstat, 2804 sizeof(struct in6_ifstat) / sizeof(uint64_t)); 2805 free(ext->in6_ifstat, M_IFADDR); 2806 COUNTER_ARRAY_FREE(ext->icmp6_ifstat, 2807 sizeof(struct icmp6_ifstat) / sizeof(uint64_t)); 2808 free(ext->icmp6_ifstat, M_IFADDR); 2809 free(ext, M_IFADDR); 2810} 2811 2812/* 2813 * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 2814 * v4 mapped addr or v4 compat addr 2815 */ 2816void 2817in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2818{ 2819 2820 bzero(sin, sizeof(*sin)); 2821 sin->sin_len = sizeof(struct sockaddr_in); 2822 sin->sin_family = AF_INET; 2823 sin->sin_port = sin6->sin6_port; 2824 sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 2825} 2826 2827/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 2828void 2829in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 2830{ 2831 bzero(sin6, sizeof(*sin6)); 2832 sin6->sin6_len = sizeof(struct sockaddr_in6); 2833 sin6->sin6_family = AF_INET6; 2834 sin6->sin6_port = sin->sin_port; 2835 sin6->sin6_addr.s6_addr32[0] = 0; 2836 sin6->sin6_addr.s6_addr32[1] = 0; 2837 sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 2838 sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 2839} 2840 2841/* Convert sockaddr_in6 into sockaddr_in. */ 2842void 2843in6_sin6_2_sin_in_sock(struct sockaddr *nam) 2844{ 2845 struct sockaddr_in *sin_p; 2846 struct sockaddr_in6 sin6; 2847 2848 /* 2849 * Save original sockaddr_in6 addr and convert it 2850 * to sockaddr_in. 2851 */ 2852 sin6 = *(struct sockaddr_in6 *)nam; 2853 sin_p = (struct sockaddr_in *)nam; 2854 in6_sin6_2_sin(sin_p, &sin6); 2855} 2856 2857/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 2858void 2859in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 2860{ 2861 struct sockaddr_in *sin_p; 2862 struct sockaddr_in6 *sin6_p; 2863 2864 sin6_p = malloc(sizeof *sin6_p, M_SONAME, M_WAITOK); 2865 sin_p = (struct sockaddr_in *)*nam; 2866 in6_sin_2_v4mapsin6(sin_p, sin6_p); 2867 free(*nam, M_SONAME); 2868 *nam = (struct sockaddr *)sin6_p; 2869} 2870