in6.c revision 219819
1139826Simp/*- 253541Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 353541Sshin * All rights reserved. 453541Sshin * 553541Sshin * Redistribution and use in source and binary forms, with or without 653541Sshin * modification, are permitted provided that the following conditions 753541Sshin * are met: 853541Sshin * 1. Redistributions of source code must retain the above copyright 953541Sshin * notice, this list of conditions and the following disclaimer. 1053541Sshin * 2. Redistributions in binary form must reproduce the above copyright 1153541Sshin * notice, this list of conditions and the following disclaimer in the 1253541Sshin * documentation and/or other materials provided with the distribution. 1353541Sshin * 3. Neither the name of the project nor the names of its contributors 1453541Sshin * may be used to endorse or promote products derived from this software 1553541Sshin * without specific prior written permission. 1653541Sshin * 1753541Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1853541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1953541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2053541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2153541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2253541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2353541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2453541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2553541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2653541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2753541Sshin * SUCH DAMAGE. 28174510Sobrien * 29174510Sobrien * $KAME: in6.c,v 1.259 2002/01/21 11:37:50 keiichi Exp $ 3053541Sshin */ 3153541Sshin 32139826Simp/*- 3353541Sshin * Copyright (c) 1982, 1986, 1991, 1993 3453541Sshin * The Regents of the University of California. All rights reserved. 3553541Sshin * 3653541Sshin * Redistribution and use in source and binary forms, with or without 3753541Sshin * modification, are permitted provided that the following conditions 3853541Sshin * are met: 3953541Sshin * 1. Redistributions of source code must retain the above copyright 4053541Sshin * notice, this list of conditions and the following disclaimer. 4153541Sshin * 2. Redistributions in binary form must reproduce the above copyright 4253541Sshin * notice, this list of conditions and the following disclaimer in the 4353541Sshin * documentation and/or other materials provided with the distribution. 4453541Sshin * 4. Neither the name of the University nor the names of its contributors 4553541Sshin * may be used to endorse or promote products derived from this software 4653541Sshin * without specific prior written permission. 4753541Sshin * 4853541Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 4953541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5053541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5153541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5253541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5353541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5453541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5553541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5653541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5753541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5853541Sshin * SUCH DAMAGE. 5953541Sshin * 6053541Sshin * @(#)in.c 8.2 (Berkeley) 11/15/93 6153541Sshin */ 6253541Sshin 63174510Sobrien#include <sys/cdefs.h> 64174510Sobrien__FBSDID("$FreeBSD: head/sys/netinet6/in6.c 219819 2011-03-21 09:40:01Z jeff $"); 65174510Sobrien 66207268Skib#include "opt_compat.h" 6762587Sitojun#include "opt_inet.h" 6862587Sitojun#include "opt_inet6.h" 6962587Sitojun 7053541Sshin#include <sys/param.h> 7153541Sshin#include <sys/errno.h> 72186948Sbz#include <sys/jail.h> 7353541Sshin#include <sys/malloc.h> 7453541Sshin#include <sys/socket.h> 7553541Sshin#include <sys/socketvar.h> 7653541Sshin#include <sys/sockio.h> 7753541Sshin#include <sys/systm.h> 78164033Srwatson#include <sys/priv.h> 7953541Sshin#include <sys/proc.h> 8053541Sshin#include <sys/time.h> 8153541Sshin#include <sys/kernel.h> 8253541Sshin#include <sys/syslog.h> 8353541Sshin 8453541Sshin#include <net/if.h> 85197227Sqingli#include <net/if_var.h> 8653541Sshin#include <net/if_types.h> 8753541Sshin#include <net/route.h> 8853541Sshin#include <net/if_dl.h> 89185571Sbz#include <net/vnet.h> 9053541Sshin 9153541Sshin#include <netinet/in.h> 9253541Sshin#include <netinet/in_var.h> 93186119Sqingli#include <net/if_llatbl.h> 9453541Sshin#include <netinet/if_ether.h> 9578064Sume#include <netinet/in_systm.h> 9678064Sume#include <netinet/ip.h> 9778064Sume#include <netinet/in_pcb.h> 9853541Sshin 9962587Sitojun#include <netinet/ip6.h> 10053541Sshin#include <netinet6/ip6_var.h> 10195023Ssuz#include <netinet6/nd6.h> 10253541Sshin#include <netinet6/mld6_var.h> 10362587Sitojun#include <netinet6/ip6_mroute.h> 10453541Sshin#include <netinet6/in6_ifattach.h> 10562587Sitojun#include <netinet6/scope6_var.h> 10678064Sume#include <netinet6/in6_pcb.h> 10762587Sitojun 10853541Sshin/* 10953541Sshin * Definitions of some costant IP6 addresses. 11053541Sshin */ 11162587Sitojunconst struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; 11262587Sitojunconst struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; 11362587Sitojunconst struct in6_addr in6addr_nodelocal_allnodes = 11453541Sshin IN6ADDR_NODELOCAL_ALLNODES_INIT; 11562587Sitojunconst struct in6_addr in6addr_linklocal_allnodes = 11653541Sshin IN6ADDR_LINKLOCAL_ALLNODES_INIT; 11762587Sitojunconst struct in6_addr in6addr_linklocal_allrouters = 11853541Sshin IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; 119191672Sbmsconst struct in6_addr in6addr_linklocal_allv2routers = 120191672Sbms IN6ADDR_LINKLOCAL_ALLV2ROUTERS_INIT; 12153541Sshin 12262587Sitojunconst struct in6_addr in6mask0 = IN6MASK0; 12362587Sitojunconst struct in6_addr in6mask32 = IN6MASK32; 12462587Sitojunconst struct in6_addr in6mask64 = IN6MASK64; 12562587Sitojunconst struct in6_addr in6mask96 = IN6MASK96; 12662587Sitojunconst struct in6_addr in6mask128 = IN6MASK128; 12753541Sshin 128126552Sumeconst struct sockaddr_in6 sa6_any = 129126552Sume { sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0 }; 13078064Sume 13162587Sitojunstatic int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, 13283366Sjulian struct ifnet *, struct thread *)); 13378064Sumestatic int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, 134120891Sume struct sockaddr_in6 *, int)); 135175162Sobrienstatic void in6_unlink_ifa(struct in6_ifaddr *, struct ifnet *); 13653541Sshin 13783934Sbrooksint (*faithprefix_p)(struct in6_addr *); 13883934Sbrooks 139120891Sume 14078064Sume 14153541Sshinint 142171259Sdelphijin6_mask2len(struct in6_addr *mask, u_char *lim0) 14353541Sshin{ 14478064Sume int x = 0, y; 14578064Sume u_char *lim = lim0, *p; 14653541Sshin 147120891Sume /* ignore the scope_id part */ 148120891Sume if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) 14978064Sume lim = (u_char *)mask + sizeof(*mask); 15078064Sume for (p = (u_char *)mask; p < lim; x++, p++) { 15178064Sume if (*p != 0xff) 15253541Sshin break; 15353541Sshin } 15453541Sshin y = 0; 15578064Sume if (p < lim) { 15653541Sshin for (y = 0; y < 8; y++) { 15778064Sume if ((*p & (0x80 >> y)) == 0) 15853541Sshin break; 15953541Sshin } 16053541Sshin } 16178064Sume 16278064Sume /* 16378064Sume * when the limit pointer is given, do a stricter check on the 16478064Sume * remaining bits. 16578064Sume */ 16678064Sume if (p < lim) { 16778064Sume if (y != 0 && (*p & (0x00ff >> y)) != 0) 168120856Sume return (-1); 16978064Sume for (p = p + 1; p < lim; p++) 17078064Sume if (*p != 0) 171120856Sume return (-1); 17278064Sume } 173120891Sume 17453541Sshin return x * 8 + y; 17553541Sshin} 17653541Sshin 17753541Sshin#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) 17862587Sitojun#define ia62ifa(ia6) (&((ia6)->ia_ifa)) 17953541Sshin 180207268Skib#ifdef COMPAT_FREEBSD32 181207268Skibstruct in6_ndifreq32 { 182207268Skib char ifname[IFNAMSIZ]; 183207268Skib uint32_t ifindex; 184207268Skib}; 185207268Skib#define SIOCGDEFIFACE32_IN6 _IOWR('i', 86, struct in6_ndifreq32) 186207268Skib#endif 187207268Skib 18853541Sshinint 189171259Sdelphijin6_control(struct socket *so, u_long cmd, caddr_t data, 190171259Sdelphij struct ifnet *ifp, struct thread *td) 19153541Sshin{ 19253541Sshin struct in6_ifreq *ifr = (struct in6_ifreq *)data; 19378064Sume struct in6_ifaddr *ia = NULL; 19453541Sshin struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; 195151539Ssuz struct sockaddr_in6 *sa6; 196164033Srwatson int error; 19753541Sshin 19862587Sitojun switch (cmd) { 19962587Sitojun case SIOCGETSGCNT_IN6: 20062587Sitojun case SIOCGETMIFCNT_IN6: 201166938Sbms return (mrt6_ioctl ? mrt6_ioctl(cmd, data) : EOPNOTSUPP); 20262587Sitojun } 20353541Sshin 204121742Sume switch(cmd) { 205121742Sume case SIOCAADDRCTL_POLICY: 206121742Sume case SIOCDADDRCTL_POLICY: 207164033Srwatson if (td != NULL) { 208164033Srwatson error = priv_check(td, PRIV_NETINET_ADDRCTRL6); 209164033Srwatson if (error) 210164033Srwatson return (error); 211164033Srwatson } 212121742Sume return (in6_src_ioctl(cmd, data)); 213121742Sume } 214121742Sume 21562587Sitojun if (ifp == NULL) 216120856Sume return (EOPNOTSUPP); 21753541Sshin 21853541Sshin switch (cmd) { 21953541Sshin case SIOCSNDFLUSH_IN6: 22053541Sshin case SIOCSPFXFLUSH_IN6: 22153541Sshin case SIOCSRTRFLUSH_IN6: 22262587Sitojun case SIOCSDEFIFACE_IN6: 22362587Sitojun case SIOCSIFINFO_FLAGS: 224193893Scperciva case SIOCSIFINFO_IN6: 225164033Srwatson if (td != NULL) { 226164033Srwatson error = priv_check(td, PRIV_NETINET_ND6); 227164033Srwatson if (error) 228164033Srwatson return (error); 229164033Srwatson } 230120891Sume /* FALLTHROUGH */ 23178064Sume case OSIOCGIFINFO_IN6: 23253541Sshin case SIOCGIFINFO_IN6: 23353541Sshin case SIOCGDRLST_IN6: 23453541Sshin case SIOCGPRLST_IN6: 23553541Sshin case SIOCGNBRINFO_IN6: 23662587Sitojun case SIOCGDEFIFACE_IN6: 237120856Sume return (nd6_ioctl(cmd, data, ifp)); 238207268Skib 239207268Skib#ifdef COMPAT_FREEBSD32 240207268Skib case SIOCGDEFIFACE32_IN6: 241207268Skib { 242207268Skib struct in6_ndifreq ndif; 243207268Skib struct in6_ndifreq32 *ndif32; 244207268Skib 245207268Skib error = nd6_ioctl(SIOCGDEFIFACE_IN6, (caddr_t)&ndif, 246207268Skib ifp); 247207268Skib if (error) 248207268Skib return (error); 249207268Skib ndif32 = (struct in6_ndifreq32 *)data; 250207268Skib ndif32->ifindex = ndif.ifindex; 251207268Skib return (0); 252207268Skib } 253207268Skib#endif 25453541Sshin } 25553541Sshin 25653541Sshin switch (cmd) { 25753541Sshin case SIOCSIFPREFIX_IN6: 25853541Sshin case SIOCDIFPREFIX_IN6: 25953541Sshin case SIOCAIFPREFIX_IN6: 26053541Sshin case SIOCCIFPREFIX_IN6: 26153541Sshin case SIOCSGIFPREFIX_IN6: 26253541Sshin case SIOCGIFPREFIX_IN6: 26378064Sume log(LOG_NOTICE, 26478064Sume "prefix ioctls are now invalidated. " 26578064Sume "please use ifconfig.\n"); 266120856Sume return (EOPNOTSUPP); 26753541Sshin } 26853541Sshin 26995023Ssuz switch (cmd) { 27062587Sitojun case SIOCSSCOPE6: 271164033Srwatson if (td != NULL) { 272164033Srwatson error = priv_check(td, PRIV_NETINET_SCOPE6); 273164033Srwatson if (error) 274164033Srwatson return (error); 275164033Srwatson } 276121161Sume return (scope6_set(ifp, 277121161Sume (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 27862587Sitojun case SIOCGSCOPE6: 279121161Sume return (scope6_get(ifp, 280121161Sume (struct scope6_id *)ifr->ifr_ifru.ifru_scope_id)); 28162587Sitojun case SIOCGSCOPE6DEF: 282121161Sume return (scope6_get_default((struct scope6_id *) 283121161Sume ifr->ifr_ifru.ifru_scope_id)); 28462587Sitojun } 28562587Sitojun 28653541Sshin switch (cmd) { 28753541Sshin case SIOCALIFADDR: 288175630Sbz if (td != NULL) { 289175630Sbz error = priv_check(td, PRIV_NET_ADDIFADDR); 290175630Sbz if (error) 291175630Sbz return (error); 292175630Sbz } 293175630Sbz return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 294175630Sbz 29553541Sshin case SIOCDLIFADDR: 296164033Srwatson if (td != NULL) { 297175630Sbz error = priv_check(td, PRIV_NET_DELIFADDR); 298164033Srwatson if (error) 299164033Srwatson return (error); 300164033Srwatson } 301120891Sume /* FALLTHROUGH */ 30253541Sshin case SIOCGLIFADDR: 30383366Sjulian return in6_lifaddr_ioctl(so, cmd, data, ifp, td); 30453541Sshin } 30553541Sshin 30653541Sshin /* 30753541Sshin * Find address for this interface, if it exists. 308151539Ssuz * 309151539Ssuz * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation 310151539Ssuz * only, and used the first interface address as the target of other 311151539Ssuz * operations (without checking ifra_addr). This was because netinet 312151539Ssuz * code/API assumed at most 1 interface address per interface. 313151539Ssuz * Since IPv6 allows a node to assign multiple addresses 314151539Ssuz * on a single interface, we almost always look and check the 315151539Ssuz * presence of ifra_addr, and reject invalid ones here. 316151539Ssuz * It also decreases duplicated code among SIOC*_IN6 operations. 31753541Sshin */ 318151539Ssuz switch (cmd) { 319151539Ssuz case SIOCAIFADDR_IN6: 320151539Ssuz case SIOCSIFPHYADDR_IN6: 321151539Ssuz sa6 = &ifra->ifra_addr; 322151539Ssuz break; 323151539Ssuz case SIOCSIFADDR_IN6: 324151539Ssuz case SIOCGIFADDR_IN6: 325151539Ssuz case SIOCSIFDSTADDR_IN6: 326151539Ssuz case SIOCSIFNETMASK_IN6: 327151539Ssuz case SIOCGIFDSTADDR_IN6: 328151539Ssuz case SIOCGIFNETMASK_IN6: 329151539Ssuz case SIOCDIFADDR_IN6: 330151539Ssuz case SIOCGIFPSRCADDR_IN6: 331151539Ssuz case SIOCGIFPDSTADDR_IN6: 332151539Ssuz case SIOCGIFAFLAG_IN6: 333151539Ssuz case SIOCSNDFLUSH_IN6: 334151539Ssuz case SIOCSPFXFLUSH_IN6: 335151539Ssuz case SIOCSRTRFLUSH_IN6: 336151539Ssuz case SIOCGIFALIFETIME_IN6: 337151539Ssuz case SIOCSIFALIFETIME_IN6: 338151539Ssuz case SIOCGIFSTAT_IN6: 339151539Ssuz case SIOCGIFSTAT_ICMP6: 340151539Ssuz sa6 = &ifr->ifr_addr; 341151539Ssuz break; 342151539Ssuz default: 343151539Ssuz sa6 = NULL; 344151539Ssuz break; 345151539Ssuz } 346151539Ssuz if (sa6 && sa6->sin6_family == AF_INET6) { 347151539Ssuz if (sa6->sin6_scope_id != 0) 348151539Ssuz error = sa6_embedscope(sa6, 0); 349148385Sume else 350151539Ssuz error = in6_setscope(&sa6->sin6_addr, ifp, NULL); 351148385Sume if (error != 0) 352148385Sume return (error); 353188144Sjamie if (td != NULL && (error = prison_check_ip6(td->td_ucred, 354188144Sjamie &sa6->sin6_addr)) != 0) 355188144Sjamie return (error); 356151539Ssuz ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); 357151539Ssuz } else 358151539Ssuz ia = NULL; 35953541Sshin 36053541Sshin switch (cmd) { 36178064Sume case SIOCSIFADDR_IN6: 36278064Sume case SIOCSIFDSTADDR_IN6: 36378064Sume case SIOCSIFNETMASK_IN6: 36478064Sume /* 36578064Sume * Since IPv6 allows a node to assign multiple addresses 366151465Ssuz * on a single interface, SIOCSIFxxx ioctls are deprecated. 36778064Sume */ 36878064Sume /* we decided to obsolete this command (20000704) */ 369194760Srwatson error = EINVAL; 370194760Srwatson goto out; 37153541Sshin 37253541Sshin case SIOCDIFADDR_IN6: 37362587Sitojun /* 37478064Sume * for IPv4, we look for existing in_ifaddr here to allow 375151465Ssuz * "ifconfig if0 delete" to remove the first IPv4 address on 376151465Ssuz * the interface. For IPv6, as the spec allows multiple 377151465Ssuz * interface address from the day one, we consider "remove the 378151465Ssuz * first one" semantics to be not preferable. 37962587Sitojun */ 380194760Srwatson if (ia == NULL) { 381194760Srwatson error = EADDRNOTAVAIL; 382194760Srwatson goto out; 383194760Srwatson } 38453541Sshin /* FALLTHROUGH */ 38553541Sshin case SIOCAIFADDR_IN6: 38662587Sitojun /* 38778064Sume * We always require users to specify a valid IPv6 address for 38878064Sume * the corresponding operation. 38962587Sitojun */ 39078064Sume if (ifra->ifra_addr.sin6_family != AF_INET6 || 391194760Srwatson ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) { 392194760Srwatson error = EAFNOSUPPORT; 393194760Srwatson goto out; 394194760Srwatson } 39553541Sshin 396164033Srwatson if (td != NULL) { 397175630Sbz error = priv_check(td, (cmd == SIOCDIFADDR_IN6) ? 398175630Sbz PRIV_NET_DELIFADDR : PRIV_NET_ADDIFADDR); 399164033Srwatson if (error) 400194760Srwatson goto out; 401164033Srwatson } 40253541Sshin break; 40353541Sshin 40453541Sshin case SIOCGIFADDR_IN6: 40553541Sshin /* This interface is basically deprecated. use SIOCGIFCONF. */ 406120891Sume /* FALLTHROUGH */ 40753541Sshin case SIOCGIFAFLAG_IN6: 40853541Sshin case SIOCGIFNETMASK_IN6: 40953541Sshin case SIOCGIFDSTADDR_IN6: 41053541Sshin case SIOCGIFALIFETIME_IN6: 41153541Sshin /* must think again about its semantics */ 412194760Srwatson if (ia == NULL) { 413194760Srwatson error = EADDRNOTAVAIL; 414194760Srwatson goto out; 415194760Srwatson } 41653541Sshin break; 417194760Srwatson 41853541Sshin case SIOCSIFALIFETIME_IN6: 41953541Sshin { 42053541Sshin struct in6_addrlifetime *lt; 42153541Sshin 422164033Srwatson if (td != NULL) { 423164033Srwatson error = priv_check(td, PRIV_NETINET_ALIFETIME6); 424164033Srwatson if (error) 425194760Srwatson goto out; 426164033Srwatson } 427194760Srwatson if (ia == NULL) { 428194760Srwatson error = EADDRNOTAVAIL; 429194760Srwatson goto out; 430194760Srwatson } 43153541Sshin /* sanity for overflow - beware unsigned */ 43253541Sshin lt = &ifr->ifr_ifru.ifru_lifetime; 433126552Sume if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && 434126552Sume lt->ia6t_vltime + time_second < time_second) { 435194760Srwatson error = EINVAL; 436194760Srwatson goto out; 43753541Sshin } 438126552Sume if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && 439126552Sume lt->ia6t_pltime + time_second < time_second) { 440194760Srwatson error = EINVAL; 441194760Srwatson goto out; 44253541Sshin } 44353541Sshin break; 44453541Sshin } 44553541Sshin } 44653541Sshin 44753541Sshin switch (cmd) { 44853541Sshin case SIOCGIFADDR_IN6: 44953541Sshin ifr->ifr_addr = ia->ia_addr; 450148385Sume if ((error = sa6_recoverscope(&ifr->ifr_addr)) != 0) 451194760Srwatson goto out; 45253541Sshin break; 45353541Sshin 45453541Sshin case SIOCGIFDSTADDR_IN6: 455194760Srwatson if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 456194760Srwatson error = EINVAL; 457194760Srwatson goto out; 458194760Srwatson } 45962587Sitojun /* 46062587Sitojun * XXX: should we check if ifa_dstaddr is NULL and return 46162587Sitojun * an error? 46262587Sitojun */ 46353541Sshin ifr->ifr_dstaddr = ia->ia_dstaddr; 464148385Sume if ((error = sa6_recoverscope(&ifr->ifr_dstaddr)) != 0) 465194760Srwatson goto out; 46653541Sshin break; 46753541Sshin 46853541Sshin case SIOCGIFNETMASK_IN6: 46953541Sshin ifr->ifr_addr = ia->ia_prefixmask; 47053541Sshin break; 47153541Sshin 47253541Sshin case SIOCGIFAFLAG_IN6: 47353541Sshin ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; 47453541Sshin break; 47553541Sshin 47653541Sshin case SIOCGIFSTAT_IN6: 477194760Srwatson if (ifp == NULL) { 478194760Srwatson error = EINVAL; 479194760Srwatson goto out; 480194760Srwatson } 481121161Sume bzero(&ifr->ifr_ifru.ifru_stat, 482121161Sume sizeof(ifr->ifr_ifru.ifru_stat)); 483121161Sume ifr->ifr_ifru.ifru_stat = 484121161Sume *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->in6_ifstat; 48553541Sshin break; 48653541Sshin 48753541Sshin case SIOCGIFSTAT_ICMP6: 488194760Srwatson if (ifp == NULL) { 489194760Srwatson error = EINVAL; 490194760Srwatson goto out; 491194760Srwatson } 492155454Sgnn bzero(&ifr->ifr_ifru.ifru_icmp6stat, 493121161Sume sizeof(ifr->ifr_ifru.ifru_icmp6stat)); 494121161Sume ifr->ifr_ifru.ifru_icmp6stat = 495121161Sume *((struct in6_ifextra *)ifp->if_afdata[AF_INET6])->icmp6_ifstat; 49653541Sshin break; 49753541Sshin 49853541Sshin case SIOCGIFALIFETIME_IN6: 49953541Sshin ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; 500151539Ssuz if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 501151539Ssuz time_t maxexpire; 502151539Ssuz struct in6_addrlifetime *retlt = 503151539Ssuz &ifr->ifr_ifru.ifru_lifetime; 504151539Ssuz 505151539Ssuz /* 506151539Ssuz * XXX: adjust expiration time assuming time_t is 507151539Ssuz * signed. 508151539Ssuz */ 509151539Ssuz maxexpire = (-1) & 510151546Ssuz ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 511151539Ssuz if (ia->ia6_lifetime.ia6t_vltime < 512151539Ssuz maxexpire - ia->ia6_updatetime) { 513151539Ssuz retlt->ia6t_expire = ia->ia6_updatetime + 514151539Ssuz ia->ia6_lifetime.ia6t_vltime; 515151539Ssuz } else 516151539Ssuz retlt->ia6t_expire = maxexpire; 517151539Ssuz } 518151539Ssuz if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 519151539Ssuz time_t maxexpire; 520151539Ssuz struct in6_addrlifetime *retlt = 521151539Ssuz &ifr->ifr_ifru.ifru_lifetime; 522151539Ssuz 523151539Ssuz /* 524151539Ssuz * XXX: adjust expiration time assuming time_t is 525151539Ssuz * signed. 526151539Ssuz */ 527151539Ssuz maxexpire = (-1) & 528151546Ssuz ~((time_t)1 << ((sizeof(maxexpire) * 8) - 1)); 529151539Ssuz if (ia->ia6_lifetime.ia6t_pltime < 530151539Ssuz maxexpire - ia->ia6_updatetime) { 531151539Ssuz retlt->ia6t_preferred = ia->ia6_updatetime + 532151539Ssuz ia->ia6_lifetime.ia6t_pltime; 533151539Ssuz } else 534151539Ssuz retlt->ia6t_preferred = maxexpire; 535151539Ssuz } 53653541Sshin break; 53753541Sshin 53853541Sshin case SIOCSIFALIFETIME_IN6: 53953541Sshin ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; 54053541Sshin /* for sanity */ 54153541Sshin if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 54253541Sshin ia->ia6_lifetime.ia6t_expire = 54353541Sshin time_second + ia->ia6_lifetime.ia6t_vltime; 54453541Sshin } else 54553541Sshin ia->ia6_lifetime.ia6t_expire = 0; 54653541Sshin if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 54753541Sshin ia->ia6_lifetime.ia6t_preferred = 54853541Sshin time_second + ia->ia6_lifetime.ia6t_pltime; 54953541Sshin } else 55053541Sshin ia->ia6_lifetime.ia6t_preferred = 0; 55153541Sshin break; 55253541Sshin 55378064Sume case SIOCAIFADDR_IN6: 55478064Sume { 555194760Srwatson int i; 556151539Ssuz struct nd_prefixctl pr0; 557151539Ssuz struct nd_prefix *pr; 55878064Sume 55962587Sitojun /* 56078064Sume * first, make or update the interface address structure, 56178064Sume * and link it to the list. 56262587Sitojun */ 563151539Ssuz if ((error = in6_update_ifa(ifp, ifra, ia, 0)) != 0) 564194760Srwatson goto out; 565194760Srwatson if (ia != NULL) 566194760Srwatson ifa_free(&ia->ia_ifa); 567151915Ssuz if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) 568151915Ssuz == NULL) { 569171260Sdelphij /* 570151915Ssuz * this can happen when the user specify the 0 valid 571151915Ssuz * lifetime. 572151915Ssuz */ 573151915Ssuz break; 574151915Ssuz } 57553541Sshin 57678064Sume /* 57778064Sume * then, make the prefix on-link on the interface. 57878064Sume * XXX: we'd rather create the prefix before the address, but 57978064Sume * we need at least one address to install the corresponding 58078064Sume * interface route, so we configure the address first. 58178064Sume */ 58278064Sume 58378064Sume /* 58478064Sume * convert mask to prefix length (prefixmask has already 58578064Sume * been validated in in6_update_ifa(). 58678064Sume */ 58778064Sume bzero(&pr0, sizeof(pr0)); 58878064Sume pr0.ndpr_ifp = ifp; 58978064Sume pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 590120891Sume NULL); 591120891Sume if (pr0.ndpr_plen == 128) { 59278064Sume break; /* we don't need to install a host route. */ 593120891Sume } 59478064Sume pr0.ndpr_prefix = ifra->ifra_addr; 59578064Sume /* apply the mask for safety. */ 59678064Sume for (i = 0; i < 4; i++) { 59778064Sume pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= 598120891Sume ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; 59978064Sume } 60078064Sume /* 60195023Ssuz * XXX: since we don't have an API to set prefix (not address) 60295023Ssuz * lifetimes, we just use the same lifetimes as addresses. 60395023Ssuz * The (temporarily) installed lifetimes can be overridden by 60495023Ssuz * later advertised RAs (when accept_rtadv is non 0), which is 60595023Ssuz * an intended behavior. 60678064Sume */ 60778064Sume pr0.ndpr_raf_onlink = 1; /* should be configurable? */ 60878064Sume pr0.ndpr_raf_auto = 609120891Sume ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); 61078064Sume pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; 61178064Sume pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; 61278064Sume 613120891Sume /* add the prefix if not yet. */ 61478064Sume if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { 61578064Sume /* 61678064Sume * nd6_prelist_add will install the corresponding 61778064Sume * interface route. 61878064Sume */ 61978064Sume if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) 620194760Srwatson goto out; 62178064Sume if (pr == NULL) { 622120891Sume log(LOG_ERR, "nd6_prelist_add succeeded but " 62378064Sume "no prefix\n"); 624194760Srwatson error = EINVAL; 625194760Srwatson goto out; 62678064Sume } 62778064Sume } 62878064Sume 629151915Ssuz /* relate the address to the prefix */ 630151915Ssuz if (ia->ia6_ndpr == NULL) { 631151915Ssuz ia->ia6_ndpr = pr; 632151915Ssuz pr->ndpr_refcnt++; 63378064Sume 63478064Sume /* 635151915Ssuz * If this is the first autoconf address from the 636151915Ssuz * prefix, create a temporary address as well 637151915Ssuz * (when required). 63878064Sume */ 639151915Ssuz if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && 640181803Sbz V_ip6_use_tempaddr && pr->ndpr_refcnt == 1) { 641151915Ssuz int e; 642151915Ssuz if ((e = in6_tmpifadd(ia, 1, 0)) != 0) { 643151915Ssuz log(LOG_NOTICE, "in6_control: failed " 644151915Ssuz "to create a temporary address, " 645151915Ssuz "errno=%d\n", e); 646151915Ssuz } 647151915Ssuz } 64862587Sitojun } 649151915Ssuz 650151915Ssuz /* 651151915Ssuz * this might affect the status of autoconfigured addresses, 652151915Ssuz * that is, this address might make other addresses detached. 653151915Ssuz */ 654151915Ssuz pfxlist_onlink_check(); 655126264Smlaier if (error == 0 && ia) 656126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 65778064Sume break; 65878064Sume } 65962587Sitojun 66078064Sume case SIOCDIFADDR_IN6: 66178064Sume { 662151539Ssuz struct nd_prefix *pr; 66378064Sume 66478064Sume /* 66578064Sume * If the address being deleted is the only one that owns 66678064Sume * the corresponding prefix, expire the prefix as well. 667120891Sume * XXX: theoretically, we don't have to worry about such 66878064Sume * relationship, since we separate the address management 66978064Sume * and the prefix management. We do this, however, to provide 67078064Sume * as much backward compatibility as possible in terms of 67178064Sume * the ioctl operation. 672151915Ssuz * Note that in6_purgeaddr() will decrement ndpr_refcnt. 67378064Sume */ 674151915Ssuz pr = ia->ia6_ndpr; 67578064Sume in6_purgeaddr(&ia->ia_ifa); 676151915Ssuz if (pr && pr->ndpr_refcnt == 0) 677151915Ssuz prelist_remove(pr); 678126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 67953541Sshin break; 68078064Sume } 68153541Sshin 68278064Sume default: 683194760Srwatson if (ifp == NULL || ifp->if_ioctl == 0) { 684194760Srwatson error = EOPNOTSUPP; 685194760Srwatson goto out; 686194760Srwatson } 687194760Srwatson error = (*ifp->if_ioctl)(ifp, cmd, data); 688194760Srwatson goto out; 68978064Sume } 69053541Sshin 691194760Srwatson error = 0; 692194760Srwatsonout: 693194760Srwatson if (ia != NULL) 694194760Srwatson ifa_free(&ia->ia_ifa); 695194760Srwatson return (error); 69678064Sume} 69753541Sshin 69878064Sume/* 69978064Sume * Update parameters of an IPv6 interface address. 70078064Sume * If necessary, a new entry is created and linked into address chains. 70178064Sume * This function is separated from in6_control(). 70278064Sume * XXX: should this be performed under splnet()? 70378064Sume */ 70478064Sumeint 705171259Sdelphijin6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 706171259Sdelphij struct in6_ifaddr *ia, int flags) 70778064Sume{ 70878064Sume int error = 0, hostIsNew = 0, plen = -1; 70978064Sume struct sockaddr_in6 dst6; 71078064Sume struct in6_addrlifetime *lt; 711151539Ssuz struct in6_multi_mship *imm; 712151539Ssuz struct in6_multi *in6m_sol; 713148385Sume struct rtentry *rt; 714151539Ssuz int delay; 715165118Sbz char ip6buf[INET6_ADDRSTRLEN]; 71678064Sume 71778064Sume /* Validate parameters */ 71878064Sume if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 719120856Sume return (EINVAL); 72078064Sume 72178064Sume /* 72278064Sume * The destination address for a p2p link must have a family 72378064Sume * of AF_UNSPEC or AF_INET6. 72478064Sume */ 72578064Sume if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 72678064Sume ifra->ifra_dstaddr.sin6_family != AF_INET6 && 72778064Sume ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 728120856Sume return (EAFNOSUPPORT); 72978064Sume /* 73078064Sume * validate ifra_prefixmask. don't check sin6_family, netmask 73178064Sume * does not carry fields other than sin6_len. 73278064Sume */ 73378064Sume if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 734120856Sume return (EINVAL); 73578064Sume /* 73678064Sume * Because the IPv6 address architecture is classless, we require 73778064Sume * users to specify a (non 0) prefix length (mask) for a new address. 73878064Sume * We also require the prefix (when specified) mask is valid, and thus 73978064Sume * reject a non-consecutive mask. 74078064Sume */ 74178064Sume if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 742120856Sume return (EINVAL); 74378064Sume if (ifra->ifra_prefixmask.sin6_len != 0) { 74478064Sume plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 745120891Sume (u_char *)&ifra->ifra_prefixmask + 746120891Sume ifra->ifra_prefixmask.sin6_len); 74778064Sume if (plen <= 0) 748120856Sume return (EINVAL); 749120891Sume } else { 75062587Sitojun /* 75195023Ssuz * In this case, ia must not be NULL. We just use its prefix 75278064Sume * length. 75362587Sitojun */ 75478064Sume plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 75578064Sume } 75678064Sume /* 75778064Sume * If the destination address on a p2p interface is specified, 75878064Sume * and the address is a scoped one, validate/set the scope 75978064Sume * zone identifier. 76078064Sume */ 76178064Sume dst6 = ifra->ifra_dstaddr; 762120891Sume if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 76378064Sume (dst6.sin6_family == AF_INET6)) { 764148385Sume struct in6_addr in6_tmp; 765126552Sume u_int32_t zoneid; 76678064Sume 767148385Sume in6_tmp = dst6.sin6_addr; 768148385Sume if (in6_setscope(&in6_tmp, ifp, &zoneid)) 769148385Sume return (EINVAL); /* XXX: should be impossible */ 770148385Sume 771148385Sume if (dst6.sin6_scope_id != 0) { 772148385Sume if (dst6.sin6_scope_id != zoneid) 773148385Sume return (EINVAL); 774148385Sume } else /* user omit to specify the ID. */ 775126552Sume dst6.sin6_scope_id = zoneid; 776148385Sume 777148385Sume /* convert into the internal form */ 778148385Sume if (sa6_embedscope(&dst6, 0)) 779148385Sume return (EINVAL); /* XXX: should be impossible */ 78078064Sume } 78178064Sume /* 78278064Sume * The destination address can be specified only for a p2p or a 78378064Sume * loopback interface. If specified, the corresponding prefix length 78478064Sume * must be 128. 78578064Sume */ 78678064Sume if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 78778064Sume if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 788126552Sume /* XXX: noisy message */ 789122059Sume nd6log((LOG_INFO, "in6_update_ifa: a destination can " 790122059Sume "be specified for a p2p or a loopback IF only\n")); 791120856Sume return (EINVAL); 79278064Sume } 79378064Sume if (plen != 128) { 794122059Sume nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 795122059Sume "be 128 when dstaddr is specified\n")); 796120856Sume return (EINVAL); 79778064Sume } 79878064Sume } 79978064Sume /* lifetime consistency check */ 80078064Sume lt = &ifra->ifra_lifetime; 801151539Ssuz if (lt->ia6t_pltime > lt->ia6t_vltime) 802151539Ssuz return (EINVAL); 80378064Sume if (lt->ia6t_vltime == 0) { 80462587Sitojun /* 80578064Sume * the following log might be noisy, but this is a typical 80678064Sume * configuration mistake or a tool's bug. 80762587Sitojun */ 808122059Sume nd6log((LOG_INFO, 80978064Sume "in6_update_ifa: valid lifetime is 0 for %s\n", 810165118Sbz ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 811151539Ssuz 812151539Ssuz if (ia == NULL) 813151539Ssuz return (0); /* there's nothing to do */ 81478064Sume } 81562587Sitojun 81678064Sume /* 81778064Sume * If this is a new address, allocate a new ifaddr and link it 81878064Sume * into chains. 81978064Sume */ 82078064Sume if (ia == NULL) { 82178064Sume hostIsNew = 1; 82279763Sume /* 82379763Sume * When in6_update_ifa() is called in a process of a received 824120891Sume * RA, it is called under an interrupt context. So, we should 825120891Sume * call malloc with M_NOWAIT. 82679763Sume */ 827120891Sume ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 828120891Sume M_NOWAIT); 82978064Sume if (ia == NULL) 83078064Sume return (ENOBUFS); 83178064Sume bzero((caddr_t)ia, sizeof(*ia)); 832194602Srwatson ifa_init(&ia->ia_ifa); 833170202Sjinmei LIST_INIT(&ia->ia6_memberships); 834151539Ssuz /* Initialize the address and masks, and put time stamp */ 83578064Sume ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 83678064Sume ia->ia_addr.sin6_family = AF_INET6; 83778064Sume ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 838151539Ssuz ia->ia6_createtime = time_second; 83978064Sume if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 84078064Sume /* 84178064Sume * XXX: some functions expect that ifa_dstaddr is not 84278064Sume * NULL for p2p interfaces. 84378064Sume */ 844120891Sume ia->ia_ifa.ifa_dstaddr = 845120891Sume (struct sockaddr *)&ia->ia_dstaddr; 84678064Sume } else { 84778064Sume ia->ia_ifa.ifa_dstaddr = NULL; 84853541Sshin } 849108033Shsu ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 85078064Sume ia->ia_ifp = ifp; 851194760Srwatson ifa_ref(&ia->ia_ifa); /* if_addrhead */ 852191323Srwatson IF_ADDR_LOCK(ifp); 853191340Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 854191323Srwatson IF_ADDR_UNLOCK(ifp); 855194907Srwatson 856194971Srwatson ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 857194971Srwatson IN6_IFADDR_WLOCK(); 858194907Srwatson TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 859194971Srwatson IN6_IFADDR_WUNLOCK(); 86078064Sume } 86178064Sume 862151539Ssuz /* update timestamp */ 863151539Ssuz ia->ia6_updatetime = time_second; 864151539Ssuz 86578064Sume /* set prefix mask */ 86678064Sume if (ifra->ifra_prefixmask.sin6_len) { 86778064Sume /* 86878064Sume * We prohibit changing the prefix length of an existing 86978064Sume * address, because 87078064Sume * + such an operation should be rare in IPv6, and 87178064Sume * + the operation would confuse prefix management. 87278064Sume */ 87378064Sume if (ia->ia_prefixmask.sin6_len && 87478064Sume in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 875122059Sume nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 87678064Sume " existing (%s) address should not be changed\n", 877165118Sbz ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 87878064Sume error = EINVAL; 87978064Sume goto unlink; 88053541Sshin } 88178064Sume ia->ia_prefixmask = ifra->ifra_prefixmask; 88278064Sume } 88378064Sume 88478064Sume /* 88578064Sume * If a new destination address is specified, scrub the old one and 88678064Sume * install the new destination. Note that the interface must be 887120891Sume * p2p or loopback (see the check above.) 88878064Sume */ 88978064Sume if (dst6.sin6_family == AF_INET6 && 890120891Sume !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 89178064Sume int e; 89278064Sume 89378064Sume if ((ia->ia_flags & IFA_ROUTE) != 0 && 894120891Sume (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 895122059Sume nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 89678064Sume "a route to the old destination: %s\n", 897165118Sbz ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 89878064Sume /* proceed anyway... */ 899120891Sume } else 90078064Sume ia->ia_flags &= ~IFA_ROUTE; 90178064Sume ia->ia_dstaddr = dst6; 90278064Sume } 90353541Sshin 904148385Sume /* 905148385Sume * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 906148385Sume * to see if the address is deprecated or invalidated, but initialize 907148385Sume * these members for applications. 908148385Sume */ 909148385Sume ia->ia6_lifetime = ifra->ifra_lifetime; 910148385Sume if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 911148385Sume ia->ia6_lifetime.ia6t_expire = 912148385Sume time_second + ia->ia6_lifetime.ia6t_vltime; 913148385Sume } else 914148385Sume ia->ia6_lifetime.ia6t_expire = 0; 915148385Sume if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 916148385Sume ia->ia6_lifetime.ia6t_preferred = 917148385Sume time_second + ia->ia6_lifetime.ia6t_pltime; 918148385Sume } else 919148385Sume ia->ia6_lifetime.ia6t_preferred = 0; 920148385Sume 92178064Sume /* reset the interface and routing table appropriately. */ 92278064Sume if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 92378064Sume goto unlink; 92478064Sume 92578064Sume /* 926148385Sume * configure address flags. 927148385Sume */ 928148385Sume ia->ia6_flags = ifra->ifra_flags; 929148385Sume /* 930148385Sume * backward compatibility - if IN6_IFF_DEPRECATED is set from the 931148385Sume * userland, make it deprecated. 932148385Sume */ 933148385Sume if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 934148385Sume ia->ia6_lifetime.ia6t_pltime = 0; 935148385Sume ia->ia6_lifetime.ia6t_preferred = time_second; 936148385Sume } 937148385Sume /* 938151539Ssuz * Make the address tentative before joining multicast addresses, 939151539Ssuz * so that corresponding MLD responses would not have a tentative 940151539Ssuz * source address. 941148385Sume */ 942151539Ssuz ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 943151539Ssuz if (hostIsNew && in6if_do_dad(ifp)) 944148385Sume ia->ia6_flags |= IN6_IFF_TENTATIVE; 945148385Sume 946197138Shrs /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 947197138Shrs if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 948197138Shrs ia->ia6_flags |= IN6_IFF_TENTATIVE; 949197138Shrs 950148385Sume /* 951148385Sume * We are done if we have simply modified an existing address. 952148385Sume */ 953148385Sume if (!hostIsNew) 954148385Sume return (error); 955148385Sume 956148385Sume /* 95778064Sume * Beyond this point, we should call in6_purgeaddr upon an error, 958120891Sume * not just go to unlink. 95978064Sume */ 96078064Sume 961151465Ssuz /* Join necessary multicast groups */ 962151539Ssuz in6m_sol = NULL; 96378064Sume if ((ifp->if_flags & IFF_MULTICAST) != 0) { 96478064Sume struct sockaddr_in6 mltaddr, mltmask; 965148385Sume struct in6_addr llsol; 96678064Sume 967148385Sume /* join solicited multicast addr for new host id */ 968148385Sume bzero(&llsol, sizeof(struct in6_addr)); 969151465Ssuz llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 970148385Sume llsol.s6_addr32[1] = 0; 971148385Sume llsol.s6_addr32[2] = htonl(1); 972148385Sume llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 973148385Sume llsol.s6_addr8[12] = 0xff; 974148385Sume if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 975148385Sume /* XXX: should not happen */ 976148385Sume log(LOG_ERR, "in6_update_ifa: " 977148385Sume "in6_setscope failed\n"); 978148385Sume goto cleanup; 97953541Sshin } 980151539Ssuz delay = 0; 981151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 982151539Ssuz /* 983151539Ssuz * We need a random delay for DAD on the address 984151539Ssuz * being configured. It also means delaying 985151539Ssuz * transmission of the corresponding MLD report to 986151539Ssuz * avoid report collision. 987197138Shrs * [RFC 4861, Section 6.3.7] 988151539Ssuz */ 989151539Ssuz delay = arc4random() % 990151539Ssuz (MAX_RTR_SOLICITATION_DELAY * hz); 991151539Ssuz } 992151539Ssuz imm = in6_joingroup(ifp, &llsol, &error, delay); 993170202Sjinmei if (imm == NULL) { 994148385Sume nd6log((LOG_WARNING, 995148385Sume "in6_update_ifa: addmulti failed for " 996148385Sume "%s on %s (errno=%d)\n", 997165118Sbz ip6_sprintf(ip6buf, &llsol), if_name(ifp), 998148385Sume error)); 999195102Srwatson goto cleanup; 1000148385Sume } 1001170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, 1002170202Sjinmei imm, i6mm_chain); 1003151539Ssuz in6m_sol = imm->i6mm_maddr; 100453541Sshin 100578064Sume bzero(&mltmask, sizeof(mltmask)); 100678064Sume mltmask.sin6_len = sizeof(struct sockaddr_in6); 100778064Sume mltmask.sin6_family = AF_INET6; 100878064Sume mltmask.sin6_addr = in6mask32; 1009151465Ssuz#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 101053541Sshin 101153541Sshin /* 101278064Sume * join link-local all-nodes address 101371207Sitojun */ 101478064Sume bzero(&mltaddr, sizeof(mltaddr)); 101578064Sume mltaddr.sin6_len = sizeof(struct sockaddr_in6); 101678064Sume mltaddr.sin6_family = AF_INET6; 101778064Sume mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1018148385Sume if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1019148385Sume 0) 1020148385Sume goto cleanup; /* XXX: should not fail */ 102171207Sitojun 1022148385Sume /* 1023148385Sume * XXX: do we really need this automatic routes? 1024148385Sume * We should probably reconsider this stuff. Most applications 1025148385Sume * actually do not need the routes, since they usually specify 1026148385Sume * the outgoing interface. 1027148385Sume */ 1028148385Sume rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1029148385Sume if (rt) { 1030174375Sjulian /* XXX: only works in !SCOPEDROUTING case. */ 1031148385Sume if (memcmp(&mltaddr.sin6_addr, 1032148385Sume &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1033151465Ssuz MLTMASK_LEN)) { 1034148385Sume RTFREE_LOCKED(rt); 1035148385Sume rt = NULL; 1036148385Sume } 1037148385Sume } 1038148385Sume if (!rt) { 1039148385Sume error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1040148385Sume (struct sockaddr *)&ia->ia_addr, 1041186119Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1042148385Sume (struct rtentry **)0); 1043148385Sume if (error) 1044148385Sume goto cleanup; 1045151539Ssuz } else { 1046151539Ssuz RTFREE_LOCKED(rt); 1047151539Ssuz } 104878064Sume 1049151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1050151539Ssuz if (!imm) { 1051151539Ssuz nd6log((LOG_WARNING, 1052151539Ssuz "in6_update_ifa: addmulti failed for " 1053151539Ssuz "%s on %s (errno=%d)\n", 1054165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1055151539Ssuz if_name(ifp), error)); 1056151539Ssuz goto cleanup; 1057151539Ssuz } 1058170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1059151539Ssuz 106071207Sitojun /* 106178064Sume * join node information group address 106253541Sshin */ 1063151539Ssuz delay = 0; 1064151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1065151539Ssuz /* 1066151539Ssuz * The spec doesn't say anything about delay for this 1067151539Ssuz * group, but the same logic should apply. 1068151539Ssuz */ 1069151539Ssuz delay = arc4random() % 1070151539Ssuz (MAX_RTR_SOLICITATION_DELAY * hz); 1071151539Ssuz } 1072192895Sjamie if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 1073151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 1074151539Ssuz delay); /* XXX jinmei */ 1075151539Ssuz if (!imm) { 1076151539Ssuz nd6log((LOG_WARNING, "in6_update_ifa: " 1077151539Ssuz "addmulti failed for %s on %s " 1078151539Ssuz "(errno=%d)\n", 1079165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1080151539Ssuz if_name(ifp), error)); 1081151539Ssuz /* XXX not very fatal, go on... */ 1082170202Sjinmei } else { 1083170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, 1084170202Sjinmei imm, i6mm_chain); 108562587Sitojun } 1086192895Sjamie } 108753541Sshin 108878064Sume /* 1089148385Sume * join interface-local all-nodes address. 1090148385Sume * (ff01::1%ifN, and ff01::%ifN/32) 109178064Sume */ 1092148385Sume mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1093148385Sume if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) 1094148385Sume != 0) 1095148385Sume goto cleanup; /* XXX: should not fail */ 1096148385Sume /* XXX: again, do we really need the route? */ 1097148385Sume rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1098148385Sume if (rt) { 1099148385Sume if (memcmp(&mltaddr.sin6_addr, 1100148385Sume &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1101151465Ssuz MLTMASK_LEN)) { 1102148385Sume RTFREE_LOCKED(rt); 1103148385Sume rt = NULL; 1104148385Sume } 1105148385Sume } 1106148385Sume if (!rt) { 1107148385Sume error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1108148385Sume (struct sockaddr *)&ia->ia_addr, 1109186119Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1110148385Sume (struct rtentry **)0); 1111148385Sume if (error) 1112148385Sume goto cleanup; 1113148385Sume } else 1114148385Sume RTFREE_LOCKED(rt); 111581115Sume 1116151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1117151539Ssuz if (!imm) { 1118151539Ssuz nd6log((LOG_WARNING, "in6_update_ifa: " 1119151539Ssuz "addmulti failed for %s on %s " 1120151539Ssuz "(errno=%d)\n", 1121165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1122151539Ssuz if_name(ifp), error)); 1123151539Ssuz goto cleanup; 1124151539Ssuz } 1125170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1126151465Ssuz#undef MLTMASK_LEN 112778064Sume } 112853541Sshin 1129151539Ssuz /* 1130151539Ssuz * Perform DAD, if needed. 1131151539Ssuz * XXX It may be of use, if we can administratively 1132151539Ssuz * disable DAD. 1133151539Ssuz */ 1134194760Srwatson if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1135151539Ssuz (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1136151539Ssuz { 1137151539Ssuz int mindelay, maxdelay; 1138151539Ssuz 1139151539Ssuz delay = 0; 1140151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1141151539Ssuz /* 1142151539Ssuz * We need to impose a delay before sending an NS 1143151539Ssuz * for DAD. Check if we also needed a delay for the 1144151539Ssuz * corresponding MLD message. If we did, the delay 1145151539Ssuz * should be larger than the MLD delay (this could be 1146151539Ssuz * relaxed a bit, but this simple logic is at least 1147151539Ssuz * safe). 1148191672Sbms * XXX: Break data hiding guidelines and look at 1149191672Sbms * state for the solicited multicast group. 1150151539Ssuz */ 1151151539Ssuz mindelay = 0; 1152151539Ssuz if (in6m_sol != NULL && 1153191672Sbms in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1154151539Ssuz mindelay = in6m_sol->in6m_timer; 1155151539Ssuz } 1156151539Ssuz maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1157151539Ssuz if (maxdelay - mindelay == 0) 1158151539Ssuz delay = 0; 1159151539Ssuz else { 1160151539Ssuz delay = 1161151539Ssuz (arc4random() % (maxdelay - mindelay)) + 1162151539Ssuz mindelay; 1163151539Ssuz } 1164151539Ssuz } 1165151539Ssuz nd6_dad_start((struct ifaddr *)ia, delay); 1166151539Ssuz } 1167151539Ssuz 1168194760Srwatson KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1169194760Srwatson ifa_free(&ia->ia_ifa); 1170120856Sume return (error); 117178064Sume 117278064Sume unlink: 117378064Sume /* 117478064Sume * XXX: if a change of an existing address failed, keep the entry 117578064Sume * anyway. 117678064Sume */ 1177194760Srwatson if (hostIsNew) { 1178194943Srwatson in6_unlink_ifa(ia, ifp); 1179194760Srwatson ifa_free(&ia->ia_ifa); 1180194760Srwatson } 1181120856Sume return (error); 1182148385Sume 1183148385Sume cleanup: 1184194760Srwatson KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1185194760Srwatson ifa_free(&ia->ia_ifa); 1186148385Sume in6_purgeaddr(&ia->ia_ifa); 1187148385Sume return error; 118853541Sshin} 118953541Sshin 119062587Sitojunvoid 1191171259Sdelphijin6_purgeaddr(struct ifaddr *ifa) 119262587Sitojun{ 119378064Sume struct ifnet *ifp = ifa->ifa_ifp; 119478064Sume struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1195170202Sjinmei struct in6_multi_mship *imm; 1196192282Sqingli struct sockaddr_in6 mltaddr, mltmask; 1197192282Sqingli struct rtentry rt0; 1198192282Sqingli struct sockaddr_dl gateway; 1199192282Sqingli struct sockaddr_in6 mask, addr; 1200192282Sqingli int plen, error; 1201192282Sqingli struct rtentry *rt; 1202192282Sqingli struct ifaddr *ifa0, *nifa; 120362587Sitojun 1204192282Sqingli /* 1205192282Sqingli * find another IPv6 address as the gateway for the 1206192282Sqingli * link-local and node-local all-nodes multicast 1207192282Sqingli * address routes 1208192282Sqingli */ 1209194760Srwatson IF_ADDR_LOCK(ifp); 1210192282Sqingli TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) { 1211192282Sqingli if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1212192282Sqingli memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1213192282Sqingli &ia->ia_addr.sin6_addr, 1214192282Sqingli sizeof(struct in6_addr)) == 0) 1215192282Sqingli continue; 1216192282Sqingli else 1217192282Sqingli break; 1218192282Sqingli } 1219194760Srwatson if (ifa0 != NULL) 1220194760Srwatson ifa_ref(ifa0); 1221194760Srwatson IF_ADDR_UNLOCK(ifp); 1222192282Sqingli 1223195914Sqingli /* 1224195914Sqingli * Remove the loopback route to the interface address. 1225196871Sqingli * The check for the current setting of "nd6_useloopback" 1226196871Sqingli * is not needed. 1227195914Sqingli */ 1228201282Sqingli if (ia->ia_flags & IFA_RTSELF) { 1229201282Sqingli error = ifa_del_loopback_route((struct ifaddr *)ia, 1230201282Sqingli (struct sockaddr *)&ia->ia_addr); 1231201282Sqingli if (error == 0) 1232201282Sqingli ia->ia_flags &= ~IFA_RTSELF; 1233201282Sqingli } 1234195643Sqingli 123578064Sume /* stop DAD processing */ 123678064Sume nd6_dad_stop(ifa); 123762587Sitojun 1238186119Sqingli IF_AFDATA_LOCK(ifp); 1239186119Sqingli lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR), 1240186119Sqingli (struct sockaddr *)&ia->ia_addr); 1241186119Sqingli IF_AFDATA_UNLOCK(ifp); 1242192282Sqingli 124378064Sume /* 1244192282Sqingli * initialize for rtmsg generation 1245192282Sqingli */ 1246192282Sqingli bzero(&gateway, sizeof(gateway)); 1247192282Sqingli gateway.sdl_len = sizeof(gateway); 1248192282Sqingli gateway.sdl_family = AF_LINK; 1249192282Sqingli gateway.sdl_nlen = 0; 1250192282Sqingli gateway.sdl_alen = ifp->if_addrlen; 1251192282Sqingli /* */ 1252192282Sqingli bzero(&rt0, sizeof(rt0)); 1253192282Sqingli rt0.rt_gateway = (struct sockaddr *)&gateway; 1254192282Sqingli memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1255192282Sqingli memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1256192282Sqingli rt_mask(&rt0) = (struct sockaddr *)&mask; 1257192282Sqingli rt_key(&rt0) = (struct sockaddr *)&addr; 1258192282Sqingli rt0.rt_flags = RTF_HOST | RTF_STATIC; 1259192282Sqingli rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0); 1260192282Sqingli 1261192282Sqingli /* 1262170202Sjinmei * leave from multicast groups we have joined for the interface 1263170202Sjinmei */ 1264170202Sjinmei while ((imm = ia->ia6_memberships.lh_first) != NULL) { 1265170202Sjinmei LIST_REMOVE(imm, i6mm_chain); 1266170202Sjinmei in6_leavegroup(imm); 126762587Sitojun } 126862587Sitojun 1269192282Sqingli /* 1270192282Sqingli * remove the link-local all-nodes address 1271192282Sqingli */ 1272192282Sqingli bzero(&mltmask, sizeof(mltmask)); 1273192282Sqingli mltmask.sin6_len = sizeof(struct sockaddr_in6); 1274192282Sqingli mltmask.sin6_family = AF_INET6; 1275192282Sqingli mltmask.sin6_addr = in6mask32; 1276192282Sqingli 1277192282Sqingli bzero(&mltaddr, sizeof(mltaddr)); 1278192282Sqingli mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1279192282Sqingli mltaddr.sin6_family = AF_INET6; 1280192282Sqingli mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1281192282Sqingli 1282192282Sqingli if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1283192282Sqingli 0) 1284192282Sqingli goto cleanup; 1285192282Sqingli 1286192282Sqingli rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1287192282Sqingli if (rt != NULL && rt->rt_gateway != NULL && 1288192282Sqingli (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1289192282Sqingli &ia->ia_addr.sin6_addr, 1290192282Sqingli sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1291192282Sqingli /* 1292192282Sqingli * if no more IPv6 address exists on this interface 1293192282Sqingli * then remove the multicast address route 1294192282Sqingli */ 1295192282Sqingli if (ifa0 == NULL) { 1296192282Sqingli memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1297192282Sqingli sizeof(mltaddr.sin6_addr)); 1298192282Sqingli RTFREE_LOCKED(rt); 1299192282Sqingli error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1300192282Sqingli (struct sockaddr *)&ia->ia_addr, 1301192282Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1302192282Sqingli (struct rtentry **)0); 1303192282Sqingli if (error) 1304192282Sqingli log(LOG_INFO, "in6_purgeaddr: link-local all-nodes" 1305192282Sqingli "multicast address deletion error\n"); 1306192282Sqingli } else { 1307192282Sqingli /* 1308192282Sqingli * replace the gateway of the route 1309192282Sqingli */ 1310192282Sqingli struct sockaddr_in6 sa; 1311192282Sqingli 1312192282Sqingli bzero(&sa, sizeof(sa)); 1313192282Sqingli sa.sin6_len = sizeof(struct sockaddr_in6); 1314192282Sqingli sa.sin6_family = AF_INET6; 1315192282Sqingli memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1316192282Sqingli sizeof(sa.sin6_addr)); 1317192282Sqingli in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1318192282Sqingli memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1319192282Sqingli RTFREE_LOCKED(rt); 1320192282Sqingli } 1321192282Sqingli } else { 1322192282Sqingli if (rt != NULL) 1323192282Sqingli RTFREE_LOCKED(rt); 1324192282Sqingli } 1325192282Sqingli 1326192282Sqingli /* 1327192282Sqingli * remove the node-local all-nodes address 1328192282Sqingli */ 1329192282Sqingli mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1330192282Sqingli if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1331192282Sqingli 0) 1332192282Sqingli goto cleanup; 1333192282Sqingli 1334192282Sqingli rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1335192282Sqingli if (rt != NULL && rt->rt_gateway != NULL && 1336192282Sqingli (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1337192282Sqingli &ia->ia_addr.sin6_addr, 1338192282Sqingli sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1339192282Sqingli /* 1340192282Sqingli * if no more IPv6 address exists on this interface 1341192282Sqingli * then remove the multicast address route 1342192282Sqingli */ 1343192282Sqingli if (ifa0 == NULL) { 1344192282Sqingli memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1345192282Sqingli sizeof(mltaddr.sin6_addr)); 1346192282Sqingli 1347192282Sqingli RTFREE_LOCKED(rt); 1348192282Sqingli error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1349192282Sqingli (struct sockaddr *)&ia->ia_addr, 1350192282Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1351192282Sqingli (struct rtentry **)0); 1352192282Sqingli 1353192282Sqingli if (error) 1354192282Sqingli log(LOG_INFO, "in6_purgeaddr: node-local all-nodes" 1355192282Sqingli "multicast address deletion error\n"); 1356192282Sqingli } else { 1357192282Sqingli /* 1358192282Sqingli * replace the gateway of the route 1359192282Sqingli */ 1360192282Sqingli struct sockaddr_in6 sa; 1361192282Sqingli 1362192282Sqingli bzero(&sa, sizeof(sa)); 1363192282Sqingli sa.sin6_len = sizeof(struct sockaddr_in6); 1364192282Sqingli sa.sin6_family = AF_INET6; 1365192282Sqingli memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1366192282Sqingli sizeof(sa.sin6_addr)); 1367192282Sqingli in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1368192282Sqingli memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1369192282Sqingli RTFREE_LOCKED(rt); 1370192282Sqingli } 1371192282Sqingli } else { 1372192282Sqingli if (rt != NULL) 1373192282Sqingli RTFREE_LOCKED(rt); 1374192282Sqingli } 1375192282Sqingli 1376192282Sqinglicleanup: 1377192282Sqingli 1378192282Sqingli plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1379192282Sqingli if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1380192282Sqingli int error; 1381192282Sqingli struct sockaddr *dstaddr; 1382192282Sqingli 1383192282Sqingli /* 1384192282Sqingli * use the interface address if configuring an 1385192282Sqingli * interface address with a /128 prefix len 1386192282Sqingli */ 1387192282Sqingli if (ia->ia_dstaddr.sin6_family == AF_INET6) 1388192282Sqingli dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 1389192282Sqingli else 1390192282Sqingli dstaddr = (struct sockaddr *)&ia->ia_addr; 1391192282Sqingli 1392192282Sqingli error = rtrequest(RTM_DELETE, 1393192282Sqingli (struct sockaddr *)dstaddr, 1394192282Sqingli (struct sockaddr *)&ia->ia_addr, 1395192282Sqingli (struct sockaddr *)&ia->ia_prefixmask, 1396192282Sqingli ia->ia_flags | RTF_HOST, NULL); 1397192282Sqingli if (error != 0) 1398192282Sqingli return; 1399192282Sqingli ia->ia_flags &= ~IFA_ROUTE; 1400192282Sqingli } 1401194760Srwatson if (ifa0 != NULL) 1402194760Srwatson ifa_free(ifa0); 1403192282Sqingli 140478064Sume in6_unlink_ifa(ia, ifp); 140578064Sume} 140678064Sume 140778064Sumestatic void 1408171259Sdelphijin6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 140978064Sume{ 141078064Sume int s = splnet(); 141178064Sume 1412191323Srwatson IF_ADDR_LOCK(ifp); 1413191340Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1414191323Srwatson IF_ADDR_UNLOCK(ifp); 1415194760Srwatson ifa_free(&ia->ia_ifa); /* if_addrhead */ 141662587Sitojun 1417195102Srwatson /* 1418195102Srwatson * Defer the release of what might be the last reference to the 1419195102Srwatson * in6_ifaddr so that it can't be freed before the remainder of the 1420195102Srwatson * cleanup. 1421195102Srwatson */ 1422194971Srwatson IN6_IFADDR_WLOCK(); 1423194907Srwatson TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1424194971Srwatson IN6_IFADDR_WUNLOCK(); 142562587Sitojun 142662587Sitojun /* 1427151915Ssuz * Release the reference to the base prefix. There should be a 1428151915Ssuz * positive reference. 142962587Sitojun */ 1430194907Srwatson if (ia->ia6_ndpr == NULL) { 1431151915Ssuz nd6log((LOG_NOTICE, 1432151915Ssuz "in6_unlink_ifa: autoconf'ed address " 1433194907Srwatson "%p has no prefix\n", ia)); 1434151915Ssuz } else { 1435194907Srwatson ia->ia6_ndpr->ndpr_refcnt--; 1436194907Srwatson ia->ia6_ndpr = NULL; 1437151915Ssuz } 143862587Sitojun 1439151915Ssuz /* 1440151915Ssuz * Also, if the address being removed is autoconf'ed, call 1441151915Ssuz * pfxlist_onlink_check() since the release might affect the status of 1442171260Sdelphij * other (detached) addresses. 1443151915Ssuz */ 1444194907Srwatson if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 144578064Sume pfxlist_onlink_check(); 144662587Sitojun } 1447195102Srwatson ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 144878064Sume splx(s); 144962587Sitojun} 145062587Sitojun 145178064Sumevoid 1452171259Sdelphijin6_purgeif(struct ifnet *ifp) 145378064Sume{ 145478064Sume struct ifaddr *ifa, *nifa; 145578064Sume 1456191340Srwatson TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 145778064Sume if (ifa->ifa_addr->sa_family != AF_INET6) 145878064Sume continue; 145978064Sume in6_purgeaddr(ifa); 146078064Sume } 146178064Sume 146278064Sume in6_ifdetach(ifp); 146378064Sume} 146478064Sume 146553541Sshin/* 146653541Sshin * SIOC[GAD]LIFADDR. 146762744Sgrog * SIOCGLIFADDR: get first address. (?) 146853541Sshin * SIOCGLIFADDR with IFLR_PREFIX: 146953541Sshin * get first address that matches the specified prefix. 147053541Sshin * SIOCALIFADDR: add the specified address. 147153541Sshin * SIOCALIFADDR with IFLR_PREFIX: 147253541Sshin * add the specified prefix, filling hostid part from 147353541Sshin * the first link-local address. prefixlen must be <= 64. 147453541Sshin * SIOCDLIFADDR: delete the specified address. 147553541Sshin * SIOCDLIFADDR with IFLR_PREFIX: 147653541Sshin * delete the first address that matches the specified prefix. 147753541Sshin * return values: 147853541Sshin * EINVAL on invalid parameters 147953541Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 148053541Sshin * other values may be returned from in6_ioctl() 148153541Sshin * 148253541Sshin * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 148353541Sshin * this is to accomodate address naming scheme other than RFC2374, 148453541Sshin * in the future. 148553541Sshin * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 148653541Sshin * address encoding scheme. (see figure on page 8) 148753541Sshin */ 148853541Sshinstatic int 1489171259Sdelphijin6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1490171259Sdelphij struct ifnet *ifp, struct thread *td) 149153541Sshin{ 149253541Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 149353541Sshin struct ifaddr *ifa; 149462587Sitojun struct sockaddr *sa; 149553541Sshin 149653541Sshin /* sanity checks */ 149753541Sshin if (!data || !ifp) { 149853541Sshin panic("invalid argument to in6_lifaddr_ioctl"); 1499120891Sume /* NOTREACHED */ 150053541Sshin } 150153541Sshin 150253541Sshin switch (cmd) { 150353541Sshin case SIOCGLIFADDR: 150453541Sshin /* address must be specified on GET with IFLR_PREFIX */ 150553541Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 150653541Sshin break; 150795023Ssuz /* FALLTHROUGH */ 150853541Sshin case SIOCALIFADDR: 150953541Sshin case SIOCDLIFADDR: 151053541Sshin /* address must be specified on ADD and DELETE */ 151162587Sitojun sa = (struct sockaddr *)&iflr->addr; 151262587Sitojun if (sa->sa_family != AF_INET6) 151353541Sshin return EINVAL; 151462587Sitojun if (sa->sa_len != sizeof(struct sockaddr_in6)) 151553541Sshin return EINVAL; 151653541Sshin /* XXX need improvement */ 151762587Sitojun sa = (struct sockaddr *)&iflr->dstaddr; 151862587Sitojun if (sa->sa_family && sa->sa_family != AF_INET6) 151953541Sshin return EINVAL; 152062587Sitojun if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 152153541Sshin return EINVAL; 152253541Sshin break; 152395023Ssuz default: /* shouldn't happen */ 152462587Sitojun#if 0 152562587Sitojun panic("invalid cmd to in6_lifaddr_ioctl"); 152695023Ssuz /* NOTREACHED */ 152762587Sitojun#else 152853541Sshin return EOPNOTSUPP; 152962587Sitojun#endif 153053541Sshin } 153153541Sshin if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 153253541Sshin return EINVAL; 153353541Sshin 153453541Sshin switch (cmd) { 153553541Sshin case SIOCALIFADDR: 153653541Sshin { 153753541Sshin struct in6_aliasreq ifra; 153853541Sshin struct in6_addr *hostid = NULL; 153953541Sshin int prefixlen; 154053541Sshin 1541194760Srwatson ifa = NULL; 154253541Sshin if ((iflr->flags & IFLR_PREFIX) != 0) { 154353541Sshin struct sockaddr_in6 *sin6; 154453541Sshin 154553541Sshin /* 154653541Sshin * hostid is to fill in the hostid part of the 154753541Sshin * address. hostid points to the first link-local 154853541Sshin * address attached to the interface. 154953541Sshin */ 155062587Sitojun ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 155153541Sshin if (!ifa) 155253541Sshin return EADDRNOTAVAIL; 155353541Sshin hostid = IFA_IN6(ifa); 155453541Sshin 1555171260Sdelphij /* prefixlen must be <= 64. */ 155653541Sshin if (64 < iflr->prefixlen) 155753541Sshin return EINVAL; 155853541Sshin prefixlen = iflr->prefixlen; 155953541Sshin 156053541Sshin /* hostid part must be zero. */ 156153541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 1562126552Sume if (sin6->sin6_addr.s6_addr32[2] != 0 || 1563126552Sume sin6->sin6_addr.s6_addr32[3] != 0) { 156453541Sshin return EINVAL; 156553541Sshin } 156653541Sshin } else 156753541Sshin prefixlen = iflr->prefixlen; 156853541Sshin 156953541Sshin /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 157053541Sshin bzero(&ifra, sizeof(ifra)); 1571120891Sume bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 157253541Sshin 157362587Sitojun bcopy(&iflr->addr, &ifra.ifra_addr, 1574120891Sume ((struct sockaddr *)&iflr->addr)->sa_len); 157553541Sshin if (hostid) { 157653541Sshin /* fill in hostid part */ 157753541Sshin ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1578120891Sume hostid->s6_addr32[2]; 157953541Sshin ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1580120891Sume hostid->s6_addr32[3]; 158153541Sshin } 158253541Sshin 1583120891Sume if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 158453541Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1585120891Sume ((struct sockaddr *)&iflr->dstaddr)->sa_len); 158653541Sshin if (hostid) { 158753541Sshin ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1588120891Sume hostid->s6_addr32[2]; 158953541Sshin ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1590120891Sume hostid->s6_addr32[3]; 159153541Sshin } 159253541Sshin } 1593194760Srwatson if (ifa != NULL) 1594194760Srwatson ifa_free(ifa); 159553541Sshin 159653541Sshin ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1597121168Sume in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 159853541Sshin 159953541Sshin ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 160083366Sjulian return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 160153541Sshin } 160253541Sshin case SIOCGLIFADDR: 160353541Sshin case SIOCDLIFADDR: 160453541Sshin { 160553541Sshin struct in6_ifaddr *ia; 160653541Sshin struct in6_addr mask, candidate, match; 160753541Sshin struct sockaddr_in6 *sin6; 160853541Sshin int cmp; 160953541Sshin 161053541Sshin bzero(&mask, sizeof(mask)); 161153541Sshin if (iflr->flags & IFLR_PREFIX) { 161253541Sshin /* lookup a prefix rather than address. */ 1613121168Sume in6_prefixlen2mask(&mask, iflr->prefixlen); 161453541Sshin 161553541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 161653541Sshin bcopy(&sin6->sin6_addr, &match, sizeof(match)); 161753541Sshin match.s6_addr32[0] &= mask.s6_addr32[0]; 161853541Sshin match.s6_addr32[1] &= mask.s6_addr32[1]; 161953541Sshin match.s6_addr32[2] &= mask.s6_addr32[2]; 162053541Sshin match.s6_addr32[3] &= mask.s6_addr32[3]; 162153541Sshin 162253541Sshin /* if you set extra bits, that's wrong */ 162353541Sshin if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 162453541Sshin return EINVAL; 162553541Sshin 162653541Sshin cmp = 1; 162753541Sshin } else { 162853541Sshin if (cmd == SIOCGLIFADDR) { 162953541Sshin /* on getting an address, take the 1st match */ 163095023Ssuz cmp = 0; /* XXX */ 163153541Sshin } else { 163253541Sshin /* on deleting an address, do exact match */ 1633121168Sume in6_prefixlen2mask(&mask, 128); 163453541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 163553541Sshin bcopy(&sin6->sin6_addr, &match, sizeof(match)); 163653541Sshin 163753541Sshin cmp = 1; 163853541Sshin } 163953541Sshin } 164053541Sshin 1641191323Srwatson IF_ADDR_LOCK(ifp); 1642191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 164353541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 164453541Sshin continue; 164553541Sshin if (!cmp) 164653541Sshin break; 164778064Sume 164878064Sume /* 164978064Sume * XXX: this is adhoc, but is necessary to allow 165078064Sume * a user to specify fe80::/64 (not /10) for a 165178064Sume * link-local address. 165278064Sume */ 1653148385Sume bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1654148385Sume in6_clearscope(&candidate); 165553541Sshin candidate.s6_addr32[0] &= mask.s6_addr32[0]; 165653541Sshin candidate.s6_addr32[1] &= mask.s6_addr32[1]; 165753541Sshin candidate.s6_addr32[2] &= mask.s6_addr32[2]; 165853541Sshin candidate.s6_addr32[3] &= mask.s6_addr32[3]; 165953541Sshin if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 166053541Sshin break; 166153541Sshin } 1662191323Srwatson IF_ADDR_UNLOCK(ifp); 166353541Sshin if (!ifa) 166453541Sshin return EADDRNOTAVAIL; 166553541Sshin ia = ifa2ia6(ifa); 166653541Sshin 166753541Sshin if (cmd == SIOCGLIFADDR) { 1668148385Sume int error; 166978064Sume 167053541Sshin /* fill in the if_laddrreq structure */ 167153541Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1672148385Sume error = sa6_recoverscope( 1673148385Sume (struct sockaddr_in6 *)&iflr->addr); 1674148385Sume if (error != 0) 1675148385Sume return (error); 1676148385Sume 167753541Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 167853541Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1679120891Sume ia->ia_dstaddr.sin6_len); 1680148385Sume error = sa6_recoverscope( 1681148385Sume (struct sockaddr_in6 *)&iflr->dstaddr); 1682148385Sume if (error != 0) 1683148385Sume return (error); 168453541Sshin } else 168553541Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 168653541Sshin 168753541Sshin iflr->prefixlen = 1688120891Sume in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 168953541Sshin 169095023Ssuz iflr->flags = ia->ia6_flags; /* XXX */ 169153541Sshin 169253541Sshin return 0; 169353541Sshin } else { 169453541Sshin struct in6_aliasreq ifra; 169553541Sshin 169653541Sshin /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 169753541Sshin bzero(&ifra, sizeof(ifra)); 169853541Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 1699120891Sume sizeof(ifra.ifra_name)); 170053541Sshin 170153541Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 1702120891Sume ia->ia_addr.sin6_len); 170353541Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 170453541Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1705120891Sume ia->ia_dstaddr.sin6_len); 170662587Sitojun } else { 170762587Sitojun bzero(&ifra.ifra_dstaddr, 170862587Sitojun sizeof(ifra.ifra_dstaddr)); 170953541Sshin } 171053541Sshin bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1711120891Sume ia->ia_prefixmask.sin6_len); 171253541Sshin 171353541Sshin ifra.ifra_flags = ia->ia6_flags; 171453541Sshin return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1715120891Sume ifp, td); 171653541Sshin } 171753541Sshin } 171853541Sshin } 171953541Sshin 172095023Ssuz return EOPNOTSUPP; /* just for safety */ 172153541Sshin} 172253541Sshin 172353541Sshin/* 172453541Sshin * Initialize an interface's intetnet6 address 172553541Sshin * and routing table entry. 172653541Sshin */ 172778064Sumestatic int 1728171259Sdelphijin6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1729171259Sdelphij struct sockaddr_in6 *sin6, int newhost) 173053541Sshin{ 173178064Sume int error = 0, plen, ifacount = 0; 173253541Sshin int s = splimp(); 173378064Sume struct ifaddr *ifa; 173453541Sshin 173553541Sshin /* 173653541Sshin * Give the interface a chance to initialize 173753541Sshin * if this is its first address, 173853541Sshin * and to validate the address if necessary. 173953541Sshin */ 1740191323Srwatson IF_ADDR_LOCK(ifp); 1741191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 174278064Sume if (ifa->ifa_addr->sa_family != AF_INET6) 174378064Sume continue; 174478064Sume ifacount++; 174578064Sume } 1746191323Srwatson IF_ADDR_UNLOCK(ifp); 174778064Sume 174878064Sume ia->ia_addr = *sin6; 174978064Sume 1750146883Siedowse if (ifacount <= 1 && ifp->if_ioctl) { 1751146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1752146883Siedowse if (error) { 1753146883Siedowse splx(s); 1754146883Siedowse return (error); 1755146883Siedowse } 175653541Sshin } 175778064Sume splx(s); 175853541Sshin 175978064Sume ia->ia_ifa.ifa_metric = ifp->if_metric; 176053541Sshin 176178064Sume /* we could do in(6)_socktrim here, but just omit it at this moment. */ 176278064Sume 176353541Sshin /* 176478064Sume * Special case: 1765124337Sume * If a new destination address is specified for a point-to-point 176678064Sume * interface, install a route to the destination as an interface 1767186119Sqingli * direct route. 1768124337Sume * XXX: the logic below rejects assigning multiple addresses on a p2p 1769159390Sgnn * interface that share the same destination. 177053541Sshin */ 177178064Sume plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1772196152Sqingli if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1773196152Sqingli ia->ia_dstaddr.sin6_family == AF_INET6) { 1774159390Sgnn int rtflags = RTF_UP | RTF_HOST; 1775159390Sgnn 1776178888Sjulian error = rtrequest(RTM_ADD, 1777196152Sqingli (struct sockaddr *)&ia->ia_dstaddr, 1778159390Sgnn (struct sockaddr *)&ia->ia_addr, 1779159390Sgnn (struct sockaddr *)&ia->ia_prefixmask, 1780186708Sqingli ia->ia_flags | rtflags, NULL); 1781159390Sgnn if (error != 0) 1782120856Sume return (error); 178378064Sume ia->ia_flags |= IFA_ROUTE; 178453541Sshin } 178553541Sshin 1786195643Sqingli /* 1787195643Sqingli * add a loopback route to self 1788195643Sqingli */ 1789196871Sqingli if (!(ia->ia_flags & IFA_ROUTE) 1790196871Sqingli && (V_nd6_useloopback 1791196871Sqingli || (ifp->if_flags & IFF_LOOPBACK))) { 1792197227Sqingli error = ifa_add_loopback_route((struct ifaddr *)ia, 1793197227Sqingli (struct sockaddr *)&ia->ia_addr); 1794201282Sqingli if (error == 0) 1795201282Sqingli ia->ia_flags |= IFA_RTSELF; 1796195643Sqingli } 1797195643Sqingli 179895023Ssuz /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1799186119Sqingli if (newhost) { 1800186119Sqingli struct llentry *ln; 1801192282Sqingli struct rtentry rt; 1802192282Sqingli struct sockaddr_dl gateway; 1803192282Sqingli struct sockaddr_in6 mask, addr; 180453541Sshin 1805186119Sqingli IF_AFDATA_LOCK(ifp); 1806186119Sqingli ia->ia_ifa.ifa_rtrequest = NULL; 1807186119Sqingli 1808186119Sqingli /* XXX QL 1809186119Sqingli * we need to report rt_newaddrmsg 1810186119Sqingli */ 1811186119Sqingli ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE), 1812186119Sqingli (struct sockaddr *)&ia->ia_addr); 1813186119Sqingli IF_AFDATA_UNLOCK(ifp); 1814186158Skmacy if (ln != NULL) { 1815186119Sqingli ln->la_expire = 0; /* for IPv6 this means permanent */ 1816186119Sqingli ln->ln_state = ND6_LLINFO_REACHABLE; 1817192282Sqingli /* 1818192282Sqingli * initialize for rtmsg generation 1819192282Sqingli */ 1820192282Sqingli bzero(&gateway, sizeof(gateway)); 1821192282Sqingli gateway.sdl_len = sizeof(gateway); 1822192282Sqingli gateway.sdl_family = AF_LINK; 1823192282Sqingli gateway.sdl_nlen = 0; 1824192282Sqingli gateway.sdl_alen = 6; 1825192282Sqingli memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr)); 1826192282Sqingli /* */ 1827186119Sqingli LLE_WUNLOCK(ln); 1828186119Sqingli } 1829192282Sqingli 1830192282Sqingli bzero(&rt, sizeof(rt)); 1831192282Sqingli rt.rt_gateway = (struct sockaddr *)&gateway; 1832192282Sqingli memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1833192282Sqingli memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1834192282Sqingli rt_mask(&rt) = (struct sockaddr *)&mask; 1835192282Sqingli rt_key(&rt) = (struct sockaddr *)&addr; 1836192282Sqingli rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 1837192282Sqingli rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt); 1838186119Sqingli } 1839186119Sqingli 1840120856Sume return (error); 184153541Sshin} 184253541Sshin 184353541Sshin/* 184453541Sshin * Find an IPv6 interface link-local address specific to an interface. 1845194760Srwatson * ifaddr is returned referenced. 184653541Sshin */ 184753541Sshinstruct in6_ifaddr * 1848171259Sdelphijin6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 184953541Sshin{ 185078064Sume struct ifaddr *ifa; 185153541Sshin 1852191323Srwatson IF_ADDR_LOCK(ifp); 1853191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 185453541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 185553541Sshin continue; 185662587Sitojun if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 185762587Sitojun if ((((struct in6_ifaddr *)ifa)->ia6_flags & 185862587Sitojun ignoreflags) != 0) 185962587Sitojun continue; 1860194760Srwatson ifa_ref(ifa); 186153541Sshin break; 186262587Sitojun } 186353541Sshin } 1864191323Srwatson IF_ADDR_UNLOCK(ifp); 186553541Sshin 1866120856Sume return ((struct in6_ifaddr *)ifa); 186753541Sshin} 186853541Sshin 186953541Sshin 187053541Sshin/* 187153541Sshin * find the internet address corresponding to a given interface and address. 1872194760Srwatson * ifaddr is returned referenced. 187353541Sshin */ 187453541Sshinstruct in6_ifaddr * 1875171259Sdelphijin6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 187653541Sshin{ 187778064Sume struct ifaddr *ifa; 187853541Sshin 1879191337Srwatson IF_ADDR_LOCK(ifp); 1880191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 188153541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 188253541Sshin continue; 1883194760Srwatson if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1884194760Srwatson ifa_ref(ifa); 188553541Sshin break; 1886194760Srwatson } 188753541Sshin } 1888191337Srwatson IF_ADDR_UNLOCK(ifp); 188953541Sshin 1890120856Sume return ((struct in6_ifaddr *)ifa); 189153541Sshin} 189253541Sshin 189353541Sshin/* 1894165118Sbz * Convert IP6 address to printable (loggable) representation. Caller 1895165118Sbz * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 189653541Sshin */ 189753541Sshinstatic char digits[] = "0123456789abcdef"; 189853541Sshinchar * 1899165118Sbzip6_sprintf(char *ip6buf, const struct in6_addr *addr) 190053541Sshin{ 1901208284Salfred int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 190278064Sume char *cp; 1903126552Sume const u_int16_t *a = (const u_int16_t *)addr; 1904126552Sume const u_int8_t *d; 1905165287Sbz int dcolon = 0, zero = 0; 190653541Sshin 1907165118Sbz cp = ip6buf; 190853541Sshin 190953541Sshin for (i = 0; i < 8; i++) { 1910208284Salfred if (*(a + i) == 0) { 1911208284Salfred cnt++; 1912208284Salfred if (cnt == 1) 1913208284Salfred idx = i; 1914208284Salfred } 1915208284Salfred else if (maxcnt < cnt) { 1916208284Salfred maxcnt = cnt; 1917208284Salfred index = idx; 1918208284Salfred cnt = 0; 1919208284Salfred } 1920208284Salfred } 1921208284Salfred if (maxcnt < cnt) { 1922208284Salfred maxcnt = cnt; 1923208284Salfred index = idx; 1924208284Salfred } 1925208284Salfred 1926208284Salfred for (i = 0; i < 8; i++) { 192753541Sshin if (dcolon == 1) { 192853541Sshin if (*a == 0) { 192953541Sshin if (i == 7) 193053541Sshin *cp++ = ':'; 193153541Sshin a++; 193253541Sshin continue; 193353541Sshin } else 193453541Sshin dcolon = 2; 193553541Sshin } 193653541Sshin if (*a == 0) { 1937208284Salfred if (dcolon == 0 && *(a + 1) == 0 && i == index) { 193853541Sshin if (i == 0) 193953541Sshin *cp++ = ':'; 194053541Sshin *cp++ = ':'; 194153541Sshin dcolon = 1; 194253541Sshin } else { 194353541Sshin *cp++ = '0'; 194453541Sshin *cp++ = ':'; 194553541Sshin } 194653541Sshin a++; 194753541Sshin continue; 194853541Sshin } 194991346Salfred d = (const u_char *)a; 1950165287Sbz /* Try to eliminate leading zeros in printout like in :0001. */ 1951165287Sbz zero = 1; 1952165287Sbz *cp = digits[*d >> 4]; 1953165287Sbz if (*cp != '0') { 1954165287Sbz zero = 0; 1955165287Sbz cp++; 1956165287Sbz } 1957165287Sbz *cp = digits[*d++ & 0xf]; 1958165287Sbz if (zero == 0 || (*cp != '0')) { 1959165287Sbz zero = 0; 1960165287Sbz cp++; 1961165287Sbz } 1962165287Sbz *cp = digits[*d >> 4]; 1963165287Sbz if (zero == 0 || (*cp != '0')) { 1964165287Sbz zero = 0; 1965165287Sbz cp++; 1966165287Sbz } 196753541Sshin *cp++ = digits[*d & 0xf]; 196853541Sshin *cp++ = ':'; 196953541Sshin a++; 197053541Sshin } 1971165118Sbz *--cp = '\0'; 1972165118Sbz return (ip6buf); 197353541Sshin} 197453541Sshin 197553541Sshinint 1976171259Sdelphijin6_localaddr(struct in6_addr *in6) 197753541Sshin{ 197853541Sshin struct in6_ifaddr *ia; 197953541Sshin 198053541Sshin if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 198153541Sshin return 1; 198253541Sshin 1983194971Srwatson IN6_IFADDR_RLOCK(); 1984194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 198553541Sshin if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 1986120891Sume &ia->ia_prefixmask.sin6_addr)) { 1987194971Srwatson IN6_IFADDR_RUNLOCK(); 198853541Sshin return 1; 1989120891Sume } 1990120891Sume } 1991194971Srwatson IN6_IFADDR_RUNLOCK(); 199253541Sshin 199353541Sshin return (0); 199453541Sshin} 199553541Sshin 199678064Sumeint 1997171259Sdelphijin6_is_addr_deprecated(struct sockaddr_in6 *sa6) 199878064Sume{ 199978064Sume struct in6_ifaddr *ia; 200078064Sume 2001194971Srwatson IN6_IFADDR_RLOCK(); 2002194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 200378064Sume if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 200478064Sume &sa6->sin6_addr) && 2005194971Srwatson (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { 2006194971Srwatson IN6_IFADDR_RUNLOCK(); 2007120856Sume return (1); /* true */ 2008194971Srwatson } 200978064Sume 201078064Sume /* XXX: do we still have to go thru the rest of the list? */ 201178064Sume } 2012194971Srwatson IN6_IFADDR_RUNLOCK(); 201378064Sume 2014120856Sume return (0); /* false */ 201578064Sume} 201678064Sume 201753541Sshin/* 201853541Sshin * return length of part which dst and src are equal 201953541Sshin * hard coding... 202053541Sshin */ 202153541Sshinint 2022171259Sdelphijin6_matchlen(struct in6_addr *src, struct in6_addr *dst) 202353541Sshin{ 202453541Sshin int match = 0; 202553541Sshin u_char *s = (u_char *)src, *d = (u_char *)dst; 202653541Sshin u_char *lim = s + 16, r; 202753541Sshin 202853541Sshin while (s < lim) 202953541Sshin if ((r = (*d++ ^ *s++)) != 0) { 203053541Sshin while (r < 128) { 203153541Sshin match++; 203253541Sshin r <<= 1; 203353541Sshin } 203453541Sshin break; 203553541Sshin } else 203653541Sshin match += 8; 203753541Sshin return match; 203853541Sshin} 203953541Sshin 204062587Sitojun/* XXX: to be scope conscious */ 204153541Sshinint 2042171259Sdelphijin6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 204353541Sshin{ 204453541Sshin int bytelen, bitlen; 204553541Sshin 204653541Sshin /* sanity check */ 204753541Sshin if (0 > len || len > 128) { 204853541Sshin log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 204953541Sshin len); 2050120856Sume return (0); 205153541Sshin } 205253541Sshin 205353541Sshin bytelen = len / 8; 205453541Sshin bitlen = len % 8; 205553541Sshin 205653541Sshin if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2057120856Sume return (0); 2058126184Scperciva if (bitlen != 0 && 2059126184Scperciva p1->s6_addr[bytelen] >> (8 - bitlen) != 206053541Sshin p2->s6_addr[bytelen] >> (8 - bitlen)) 2061120856Sume return (0); 206253541Sshin 2063120856Sume return (1); 206453541Sshin} 206553541Sshin 206653541Sshinvoid 2067171259Sdelphijin6_prefixlen2mask(struct in6_addr *maskp, int len) 206853541Sshin{ 206953541Sshin u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 207053541Sshin int bytelen, bitlen, i; 207153541Sshin 207253541Sshin /* sanity check */ 207353541Sshin if (0 > len || len > 128) { 207453541Sshin log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 207553541Sshin len); 207653541Sshin return; 207753541Sshin } 207853541Sshin 207953541Sshin bzero(maskp, sizeof(*maskp)); 208053541Sshin bytelen = len / 8; 208153541Sshin bitlen = len % 8; 208253541Sshin for (i = 0; i < bytelen; i++) 208353541Sshin maskp->s6_addr[i] = 0xff; 208453541Sshin if (bitlen) 208553541Sshin maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 208653541Sshin} 208753541Sshin 208853541Sshin/* 208953541Sshin * return the best address out of the same scope. if no address was 209053541Sshin * found, return the first valid address from designated IF. 209153541Sshin */ 209253541Sshinstruct in6_ifaddr * 2093171259Sdelphijin6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 209453541Sshin{ 209553541Sshin int dst_scope = in6_addrscope(dst), blen = -1, tlen; 209653541Sshin struct ifaddr *ifa; 209753541Sshin struct in6_ifaddr *besta = 0; 209895023Ssuz struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 209953541Sshin 210053541Sshin dep[0] = dep[1] = NULL; 210153541Sshin 210253541Sshin /* 210353541Sshin * We first look for addresses in the same scope. 210453541Sshin * If there is one, return it. 210553541Sshin * If two or more, return one which matches the dst longest. 210653541Sshin * If none, return one of global addresses assigned other ifs. 210753541Sshin */ 2108191323Srwatson IF_ADDR_LOCK(ifp); 2109191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 211053541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 211153541Sshin continue; 211253541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 211353541Sshin continue; /* XXX: is there any case to allow anycast? */ 211453541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 211553541Sshin continue; /* don't use this interface */ 211653541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 211753541Sshin continue; 211853541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2119181803Sbz if (V_ip6_use_deprecated) 212053541Sshin dep[0] = (struct in6_ifaddr *)ifa; 212153541Sshin continue; 212253541Sshin } 212353541Sshin 212453541Sshin if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 212553541Sshin /* 212653541Sshin * call in6_matchlen() as few as possible 212753541Sshin */ 212853541Sshin if (besta) { 212953541Sshin if (blen == -1) 213053541Sshin blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 213153541Sshin tlen = in6_matchlen(IFA_IN6(ifa), dst); 213253541Sshin if (tlen > blen) { 213353541Sshin blen = tlen; 213453541Sshin besta = (struct in6_ifaddr *)ifa; 213553541Sshin } 213653541Sshin } else 213753541Sshin besta = (struct in6_ifaddr *)ifa; 213853541Sshin } 213953541Sshin } 2140191323Srwatson if (besta) { 2141194760Srwatson ifa_ref(&besta->ia_ifa); 2142191323Srwatson IF_ADDR_UNLOCK(ifp); 2143120856Sume return (besta); 2144191323Srwatson } 2145194971Srwatson IF_ADDR_UNLOCK(ifp); 214653541Sshin 2147194971Srwatson IN6_IFADDR_RLOCK(); 2148191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 214953541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 215053541Sshin continue; 215153541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 215253541Sshin continue; /* XXX: is there any case to allow anycast? */ 215353541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 215453541Sshin continue; /* don't use this interface */ 215553541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 215653541Sshin continue; 215753541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2158181803Sbz if (V_ip6_use_deprecated) 215953541Sshin dep[1] = (struct in6_ifaddr *)ifa; 216053541Sshin continue; 216153541Sshin } 216253541Sshin 2163194760Srwatson if (ifa != NULL) 2164194760Srwatson ifa_ref(ifa); 2165194971Srwatson IN6_IFADDR_RUNLOCK(); 216653541Sshin return (struct in6_ifaddr *)ifa; 216753541Sshin } 2168194971Srwatson IN6_IFADDR_RUNLOCK(); 216953541Sshin 217053541Sshin /* use the last-resort values, that are, deprecated addresses */ 217153541Sshin if (dep[0]) 217253541Sshin return dep[0]; 217353541Sshin if (dep[1]) 217453541Sshin return dep[1]; 217553541Sshin 217653541Sshin return NULL; 217753541Sshin} 217853541Sshin 217953541Sshin/* 218053541Sshin * perform DAD when interface becomes IFF_UP. 218153541Sshin */ 218253541Sshinvoid 2183171259Sdelphijin6_if_up(struct ifnet *ifp) 218453541Sshin{ 218553541Sshin struct ifaddr *ifa; 218653541Sshin struct in6_ifaddr *ia; 218753541Sshin 2188191323Srwatson IF_ADDR_LOCK(ifp); 2189191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 219053541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 219153541Sshin continue; 219253541Sshin ia = (struct in6_ifaddr *)ifa; 2193151539Ssuz if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2194151539Ssuz /* 2195151539Ssuz * The TENTATIVE flag was likely set by hand 2196151539Ssuz * beforehand, implicitly indicating the need for DAD. 2197151539Ssuz * We may be able to skip the random delay in this 2198151539Ssuz * case, but we impose delays just in case. 2199151539Ssuz */ 2200151539Ssuz nd6_dad_start(ifa, 2201151539Ssuz arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2202151539Ssuz } 220353541Sshin } 2204191323Srwatson IF_ADDR_UNLOCK(ifp); 2205151539Ssuz 2206151539Ssuz /* 2207151539Ssuz * special cases, like 6to4, are handled in in6_ifattach 2208151539Ssuz */ 2209151539Ssuz in6_ifattach(ifp, NULL); 221053541Sshin} 221153541Sshin 221278064Sumeint 2213171259Sdelphijin6if_do_dad(struct ifnet *ifp) 221478064Sume{ 221578064Sume if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2216120856Sume return (0); 221778064Sume 2218197138Shrs if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 2219197138Shrs return (0); 2220197138Shrs 222178064Sume switch (ifp->if_type) { 222278064Sume#ifdef IFT_DUMMY 222378064Sume case IFT_DUMMY: 222478064Sume#endif 222578064Sume case IFT_FAITH: 222678064Sume /* 222778064Sume * These interfaces do not have the IFF_LOOPBACK flag, 222878064Sume * but loop packets back. We do not have to do DAD on such 222978064Sume * interfaces. We should even omit it, because loop-backed 223078064Sume * NS would confuse the DAD procedure. 223178064Sume */ 2232120856Sume return (0); 223378064Sume default: 223478064Sume /* 223578064Sume * Our DAD routine requires the interface up and running. 223678064Sume * However, some interfaces can be up before the RUNNING 223778064Sume * status. Additionaly, users may try to assign addresses 223878064Sume * before the interface becomes up (or running). 223978064Sume * We simply skip DAD in such a case as a work around. 224078064Sume * XXX: we should rather mark "tentative" on such addresses, 224178064Sume * and do DAD after the interface becomes ready. 224278064Sume */ 2243148887Srwatson if (!((ifp->if_flags & IFF_UP) && 2244148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2245120856Sume return (0); 224678064Sume 2247120856Sume return (1); 224878064Sume } 224978064Sume} 225078064Sume 225153541Sshin/* 225253541Sshin * Calculate max IPv6 MTU through all the interfaces and store it 225353541Sshin * to in6_maxmtu. 225453541Sshin */ 225553541Sshinvoid 2256171259Sdelphijin6_setmaxmtu(void) 225753541Sshin{ 225853541Sshin unsigned long maxmtu = 0; 225953541Sshin struct ifnet *ifp; 226053541Sshin 2261196481Srwatson IFNET_RLOCK_NOSLEEP(); 2262181887Sjulian for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 2263181888Sjulian ifp = TAILQ_NEXT(ifp, if_list)) { 2264121283Sume /* this function can be called during ifnet initialization */ 2265121283Sume if (!ifp->if_afdata[AF_INET6]) 2266121283Sume continue; 226753541Sshin if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2268121283Sume IN6_LINKMTU(ifp) > maxmtu) 2269121283Sume maxmtu = IN6_LINKMTU(ifp); 227053541Sshin } 2271196481Srwatson IFNET_RUNLOCK_NOSLEEP(); 2272120891Sume if (maxmtu) /* update only when maxmtu is positive */ 2273181803Sbz V_in6_maxmtu = maxmtu; 227453541Sshin} 227553541Sshin 2276151539Ssuz/* 2277151539Ssuz * Provide the length of interface identifiers to be used for the link attached 2278151539Ssuz * to the given interface. The length should be defined in "IPv6 over 2279151539Ssuz * xxx-link" document. Note that address architecture might also define 2280151539Ssuz * the length for a particular set of address prefixes, regardless of the 2281151539Ssuz * link type. As clarified in rfc2462bis, those two definitions should be 2282151539Ssuz * consistent, and those really are as of August 2004. 2283151539Ssuz */ 2284151539Ssuzint 2285171259Sdelphijin6_if2idlen(struct ifnet *ifp) 2286151539Ssuz{ 2287151539Ssuz switch (ifp->if_type) { 2288151539Ssuz case IFT_ETHER: /* RFC2464 */ 2289151539Ssuz#ifdef IFT_PROPVIRTUAL 2290151539Ssuz case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2291151539Ssuz#endif 2292151539Ssuz#ifdef IFT_L2VLAN 2293151539Ssuz case IFT_L2VLAN: /* ditto */ 2294151539Ssuz#endif 2295151539Ssuz#ifdef IFT_IEEE80211 2296151539Ssuz case IFT_IEEE80211: /* ditto */ 2297151539Ssuz#endif 2298151539Ssuz#ifdef IFT_MIP 2299151539Ssuz case IFT_MIP: /* ditto */ 2300151539Ssuz#endif 2301219819Sjeff case IFT_INFINIBAND: 2302151539Ssuz return (64); 2303151539Ssuz case IFT_FDDI: /* RFC2467 */ 2304151539Ssuz return (64); 2305151539Ssuz case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2306151539Ssuz return (64); 2307151539Ssuz case IFT_PPP: /* RFC2472 */ 2308151539Ssuz return (64); 2309151539Ssuz case IFT_ARCNET: /* RFC2497 */ 2310151539Ssuz return (64); 2311151539Ssuz case IFT_FRELAY: /* RFC2590 */ 2312151539Ssuz return (64); 2313151539Ssuz case IFT_IEEE1394: /* RFC3146 */ 2314151539Ssuz return (64); 2315151539Ssuz case IFT_GIF: 2316151539Ssuz return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2317151539Ssuz case IFT_LOOP: 2318151539Ssuz return (64); /* XXX: is this really correct? */ 2319151539Ssuz default: 2320151539Ssuz /* 2321151539Ssuz * Unknown link type: 2322151539Ssuz * It might be controversial to use the today's common constant 2323151539Ssuz * of 64 for these cases unconditionally. For full compliance, 2324151539Ssuz * we should return an error in this case. On the other hand, 2325151539Ssuz * if we simply miss the standard for the link type or a new 2326151539Ssuz * standard is defined for a new link type, the IFID length 2327151539Ssuz * is very likely to be the common constant. As a compromise, 2328151539Ssuz * we always use the constant, but make an explicit notice 2329151539Ssuz * indicating the "unknown" case. 2330151539Ssuz */ 2331151539Ssuz printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2332151539Ssuz return (64); 2333151539Ssuz } 2334151539Ssuz} 2335151539Ssuz 2336186119Sqingli#include <sys/sysctl.h> 2337186119Sqingli 2338186119Sqinglistruct in6_llentry { 2339186119Sqingli struct llentry base; 2340186119Sqingli struct sockaddr_in6 l3_addr6; 2341186119Sqingli}; 2342186119Sqingli 2343186119Sqinglistatic struct llentry * 2344186119Sqingliin6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2345186119Sqingli{ 2346186119Sqingli struct in6_llentry *lle; 2347186119Sqingli 2348186119Sqingli lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, 2349186119Sqingli M_DONTWAIT | M_ZERO); 2350186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 2351186119Sqingli return NULL; 2352186119Sqingli 2353186119Sqingli lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2354186119Sqingli lle->base.lle_refcnt = 1; 2355186119Sqingli LLE_LOCK_INIT(&lle->base); 2356216022Sbz callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock, 2357216022Sbz CALLOUT_RETURNUNLOCKED); 2358216022Sbz 2359186119Sqingli return &lle->base; 2360186119Sqingli} 2361186119Sqingli 2362186119Sqingli/* 2363186119Sqingli * Deletes an address from the address table. 2364186119Sqingli * This function is called by the timer functions 2365186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 2366186119Sqingli * the caller does the locking. 2367186119Sqingli */ 2368186119Sqinglistatic void 2369186119Sqingliin6_lltable_free(struct lltable *llt, struct llentry *lle) 2370186119Sqingli{ 2371186150Skmacy LLE_WUNLOCK(lle); 2372186150Skmacy LLE_LOCK_DESTROY(lle); 2373186119Sqingli free(lle, M_LLTABLE); 2374186119Sqingli} 2375186119Sqingli 2376192476Sqinglistatic void 2377192476Sqingliin6_lltable_prefix_free(struct lltable *llt, 2378192476Sqingli const struct sockaddr *prefix, 2379192476Sqingli const struct sockaddr *mask) 2380192476Sqingli{ 2381192476Sqingli const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2382192476Sqingli const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2383192476Sqingli struct llentry *lle, *next; 2384192476Sqingli register int i; 2385192476Sqingli 2386192476Sqingli for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 2387192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2388192476Sqingli if (IN6_ARE_MASKED_ADDR_EQUAL( 2389192476Sqingli &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr, 2390192476Sqingli &pfx->sin6_addr, 2391192476Sqingli &msk->sin6_addr)) { 2392206481Sbz int canceled; 2393206481Sbz 2394206481Sbz canceled = callout_drain(&lle->la_timer); 2395192476Sqingli LLE_WLOCK(lle); 2396206481Sbz if (canceled) 2397206481Sbz LLE_REMREF(lle); 2398192476Sqingli llentry_free(lle); 2399192476Sqingli } 2400192476Sqingli } 2401192476Sqingli } 2402192476Sqingli} 2403192476Sqingli 2404186119Sqinglistatic int 2405201282Sqingliin6_lltable_rtcheck(struct ifnet *ifp, 2406201282Sqingli u_int flags, 2407201282Sqingli const struct sockaddr *l3addr) 2408186119Sqingli{ 2409186119Sqingli struct rtentry *rt; 2410186119Sqingli char ip6buf[INET6_ADDRSTRLEN]; 2411186119Sqingli 2412186119Sqingli KASSERT(l3addr->sa_family == AF_INET6, 2413186119Sqingli ("sin_family %d", l3addr->sa_family)); 2414186119Sqingli 2415186119Sqingli /* XXX rtalloc1 should take a const param */ 2416186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 2417186119Sqingli if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2418186119Sqingli struct ifaddr *ifa; 2419186119Sqingli /* 2420186119Sqingli * Create an ND6 cache for an IPv6 neighbor 2421186119Sqingli * that is not covered by our own prefix. 2422186119Sqingli */ 2423186119Sqingli /* XXX ifaof_ifpforaddr should take a const param */ 2424186119Sqingli ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2425186119Sqingli if (ifa != NULL) { 2426194760Srwatson ifa_free(ifa); 2427186119Sqingli if (rt != NULL) 2428187946Sbz RTFREE_LOCKED(rt); 2429186119Sqingli return 0; 2430186119Sqingli } 2431186119Sqingli log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2432186119Sqingli ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2433186119Sqingli if (rt != NULL) 2434187946Sbz RTFREE_LOCKED(rt); 2435186119Sqingli return EINVAL; 2436186119Sqingli } 2437187946Sbz RTFREE_LOCKED(rt); 2438186119Sqingli return 0; 2439186119Sqingli} 2440186119Sqingli 2441186119Sqinglistatic struct llentry * 2442186119Sqingliin6_lltable_lookup(struct lltable *llt, u_int flags, 2443186119Sqingli const struct sockaddr *l3addr) 2444186119Sqingli{ 2445186119Sqingli const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2446186119Sqingli struct ifnet *ifp = llt->llt_ifp; 2447186119Sqingli struct llentry *lle; 2448186119Sqingli struct llentries *lleh; 2449186119Sqingli u_int hashkey; 2450186119Sqingli 2451186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 2452186119Sqingli KASSERT(l3addr->sa_family == AF_INET6, 2453186119Sqingli ("sin_family %d", l3addr->sa_family)); 2454186119Sqingli 2455186119Sqingli hashkey = sin6->sin6_addr.s6_addr32[3]; 2456186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2457186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 2458186708Sqingli struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2459186119Sqingli if (lle->la_flags & LLE_DELETED) 2460186119Sqingli continue; 2461186708Sqingli if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2462186708Sqingli sizeof(struct in6_addr)) == 0) 2463186119Sqingli break; 2464186119Sqingli } 2465186119Sqingli 2466186119Sqingli if (lle == NULL) { 2467186119Sqingli if (!(flags & LLE_CREATE)) 2468186119Sqingli return (NULL); 2469186119Sqingli /* 2470186119Sqingli * A route that covers the given address must have 2471186119Sqingli * been installed 1st because we are doing a resolution, 2472186119Sqingli * verify this. 2473186119Sqingli */ 2474186119Sqingli if (!(flags & LLE_IFADDR) && 2475201282Sqingli in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2476186119Sqingli return NULL; 2477186119Sqingli 2478186119Sqingli lle = in6_lltable_new(l3addr, flags); 2479186119Sqingli if (lle == NULL) { 2480186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2481186119Sqingli return NULL; 2482186119Sqingli } 2483186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 2484186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2485186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2486186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 2487186119Sqingli } 2488186119Sqingli 2489186119Sqingli lle->lle_tbl = llt; 2490186119Sqingli lle->lle_head = lleh; 2491186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 2492186119Sqingli } else if (flags & LLE_DELETE) { 2493186392Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2494186392Sqingli LLE_WLOCK(lle); 2495186392Sqingli lle->la_flags = LLE_DELETED; 2496186392Sqingli LLE_WUNLOCK(lle); 2497198418Sqingli#ifdef DIAGNOSTIC 2498186392Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2499186119Sqingli#endif 2500186392Sqingli } 2501186119Sqingli lle = (void *)-1; 2502186119Sqingli } 2503186119Sqingli if (LLE_IS_VALID(lle)) { 2504186119Sqingli if (flags & LLE_EXCLUSIVE) 2505186119Sqingli LLE_WLOCK(lle); 2506186119Sqingli else 2507186119Sqingli LLE_RLOCK(lle); 2508186119Sqingli } 2509186119Sqingli return (lle); 2510186119Sqingli} 2511186119Sqingli 2512186119Sqinglistatic int 2513186119Sqingliin6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2514186119Sqingli{ 2515186119Sqingli struct ifnet *ifp = llt->llt_ifp; 2516186119Sqingli struct llentry *lle; 2517186119Sqingli /* XXX stack use */ 2518186119Sqingli struct { 2519186119Sqingli struct rt_msghdr rtm; 2520186119Sqingli struct sockaddr_in6 sin6; 2521186119Sqingli /* 2522186119Sqingli * ndp.c assumes that sdl is word aligned 2523186119Sqingli */ 2524186119Sqingli#ifdef __LP64__ 2525186119Sqingli uint32_t pad; 2526186119Sqingli#endif 2527186119Sqingli struct sockaddr_dl sdl; 2528186119Sqingli } ndpc; 2529186119Sqingli int i, error; 2530186119Sqingli 2531196864Sqingli if (ifp->if_flags & IFF_LOOPBACK) 2532196864Sqingli return 0; 2533196864Sqingli 2534196535Srwatson LLTABLE_LOCK_ASSERT(); 2535186119Sqingli 2536186119Sqingli error = 0; 2537186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2538186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2539186119Sqingli struct sockaddr_dl *sdl; 2540186119Sqingli 2541186119Sqingli /* skip deleted or invalid entries */ 2542186119Sqingli if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2543186119Sqingli continue; 2544186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 2545188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2546186980Sbz continue; 2547186119Sqingli /* 2548186119Sqingli * produce a msg made of: 2549186119Sqingli * struct rt_msghdr; 2550186119Sqingli * struct sockaddr_in6 (IPv6) 2551186119Sqingli * struct sockaddr_dl; 2552186119Sqingli */ 2553186119Sqingli bzero(&ndpc, sizeof(ndpc)); 2554186119Sqingli ndpc.rtm.rtm_msglen = sizeof(ndpc); 2555187094Sqingli ndpc.rtm.rtm_version = RTM_VERSION; 2556187094Sqingli ndpc.rtm.rtm_type = RTM_GET; 2557187094Sqingli ndpc.rtm.rtm_flags = RTF_UP; 2558187094Sqingli ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2559186119Sqingli ndpc.sin6.sin6_family = AF_INET6; 2560186119Sqingli ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2561186119Sqingli bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2562186119Sqingli 2563186119Sqingli /* publish */ 2564186119Sqingli if (lle->la_flags & LLE_PUB) 2565186119Sqingli ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2566186119Sqingli 2567186119Sqingli sdl = &ndpc.sdl; 2568186119Sqingli sdl->sdl_family = AF_LINK; 2569186119Sqingli sdl->sdl_len = sizeof(*sdl); 2570186119Sqingli sdl->sdl_alen = ifp->if_addrlen; 2571186119Sqingli sdl->sdl_index = ifp->if_index; 2572186119Sqingli sdl->sdl_type = ifp->if_type; 2573186119Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2574186119Sqingli ndpc.rtm.rtm_rmx.rmx_expire = 2575186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2576186500Sqingli ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2577186119Sqingli if (lle->la_flags & LLE_STATIC) 2578186119Sqingli ndpc.rtm.rtm_flags |= RTF_STATIC; 2579186119Sqingli ndpc.rtm.rtm_index = ifp->if_index; 2580186119Sqingli error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2581186119Sqingli if (error) 2582186119Sqingli break; 2583186119Sqingli } 2584186119Sqingli } 2585186119Sqingli return error; 2586186119Sqingli} 2587186119Sqingli 2588121161Sumevoid * 2589171259Sdelphijin6_domifattach(struct ifnet *ifp) 2590121161Sume{ 2591121161Sume struct in6_ifextra *ext; 2592121161Sume 2593121161Sume ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2594121161Sume bzero(ext, sizeof(*ext)); 2595121161Sume 2596121161Sume ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2597121161Sume M_IFADDR, M_WAITOK); 2598121161Sume bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2599121161Sume 2600121161Sume ext->icmp6_ifstat = 2601121161Sume (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2602121161Sume M_IFADDR, M_WAITOK); 2603121161Sume bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2604121161Sume 2605121161Sume ext->nd_ifinfo = nd6_ifattach(ifp); 2606121161Sume ext->scope6_id = scope6_ifattach(ifp); 2607186119Sqingli ext->lltable = lltable_init(ifp, AF_INET6); 2608186119Sqingli if (ext->lltable != NULL) { 2609186119Sqingli ext->lltable->llt_new = in6_lltable_new; 2610186119Sqingli ext->lltable->llt_free = in6_lltable_free; 2611192476Sqingli ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2612186119Sqingli ext->lltable->llt_rtcheck = in6_lltable_rtcheck; 2613186119Sqingli ext->lltable->llt_lookup = in6_lltable_lookup; 2614186119Sqingli ext->lltable->llt_dump = in6_lltable_dump; 2615186119Sqingli } 2616191672Sbms 2617191672Sbms ext->mld_ifinfo = mld_domifattach(ifp); 2618191672Sbms 2619121161Sume return ext; 2620121161Sume} 2621121161Sume 2622121161Sumevoid 2623171259Sdelphijin6_domifdetach(struct ifnet *ifp, void *aux) 2624121161Sume{ 2625121161Sume struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2626121161Sume 2627191672Sbms mld_domifdetach(ifp); 2628121161Sume scope6_ifdetach(ext->scope6_id); 2629121161Sume nd6_ifdetach(ext->nd_ifinfo); 2630186119Sqingli lltable_free(ext->lltable); 2631121161Sume free(ext->in6_ifstat, M_IFADDR); 2632121161Sume free(ext->icmp6_ifstat, M_IFADDR); 2633121161Sume free(ext, M_IFADDR); 2634121161Sume} 2635121161Sume 263653541Sshin/* 263795023Ssuz * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 263853541Sshin * v4 mapped addr or v4 compat addr 263953541Sshin */ 264053541Sshinvoid 264153541Sshinin6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 264253541Sshin{ 2643171259Sdelphij 264453541Sshin bzero(sin, sizeof(*sin)); 264553541Sshin sin->sin_len = sizeof(struct sockaddr_in); 264653541Sshin sin->sin_family = AF_INET; 264753541Sshin sin->sin_port = sin6->sin6_port; 2648120891Sume sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 264953541Sshin} 265053541Sshin 265153541Sshin/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 265253541Sshinvoid 265353541Sshinin6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 265453541Sshin{ 265553541Sshin bzero(sin6, sizeof(*sin6)); 265653541Sshin sin6->sin6_len = sizeof(struct sockaddr_in6); 265753541Sshin sin6->sin6_family = AF_INET6; 265853541Sshin sin6->sin6_port = sin->sin_port; 265953541Sshin sin6->sin6_addr.s6_addr32[0] = 0; 266053541Sshin sin6->sin6_addr.s6_addr32[1] = 0; 266153541Sshin sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 266253541Sshin sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 266353541Sshin} 266453541Sshin 266553541Sshin/* Convert sockaddr_in6 into sockaddr_in. */ 266653541Sshinvoid 266753541Sshinin6_sin6_2_sin_in_sock(struct sockaddr *nam) 266853541Sshin{ 266953541Sshin struct sockaddr_in *sin_p; 267053541Sshin struct sockaddr_in6 sin6; 267153541Sshin 267253541Sshin /* 267353541Sshin * Save original sockaddr_in6 addr and convert it 267453541Sshin * to sockaddr_in. 267553541Sshin */ 267653541Sshin sin6 = *(struct sockaddr_in6 *)nam; 267753541Sshin sin_p = (struct sockaddr_in *)nam; 267853541Sshin in6_sin6_2_sin(sin_p, &sin6); 267953541Sshin} 268053541Sshin 268153541Sshin/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 268253541Sshinvoid 268353541Sshinin6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 268453541Sshin{ 268553541Sshin struct sockaddr_in *sin_p; 268653541Sshin struct sockaddr_in6 *sin6_p; 268753541Sshin 2688184205Sdes sin6_p = malloc(sizeof *sin6_p, M_SONAME, 2689111119Simp M_WAITOK); 269053541Sshin sin_p = (struct sockaddr_in *)*nam; 269153541Sshin in6_sin_2_v4mapsin6(sin_p, sin6_p); 2692184205Sdes free(*nam, M_SONAME); 269353541Sshin *nam = (struct sockaddr *)sin6_p; 269453541Sshin} 2695