in6.c revision 222730
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 222730 2011-06-06 02:37:38Z hrs $"); 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(); 655222730Shrs if (error == 0 && ia) { 656222730Shrs if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) { 657222730Shrs /* 658222730Shrs * Try to clear the flag when a new 659222730Shrs * IPv6 address is added onto an 660222730Shrs * IFDISABLED interface and it 661222730Shrs * succeeds. 662222730Shrs */ 663222730Shrs struct in6_ndireq nd; 664222730Shrs 665222730Shrs memset(&nd, 0, sizeof(nd)); 666222730Shrs nd.ndi.flags = ND_IFINFO(ifp)->flags; 667222730Shrs nd.ndi.flags &= ~ND6_IFF_IFDISABLED; 668222730Shrs if (nd6_ioctl(SIOCSIFINFO_FLAGS, 669222730Shrs (caddr_t)&nd, ifp) < 0) 670222730Shrs log(LOG_NOTICE, "SIOCAIFADDR_IN6: " 671222730Shrs "SIOCSIFINFO_FLAGS for -ifdisabled " 672222730Shrs "failed."); 673222730Shrs /* 674222730Shrs * Ignore failure of clearing the flag 675222730Shrs * intentionally. The failure means 676222730Shrs * address duplication was detected. 677222730Shrs */ 678222730Shrs } 679126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 680222730Shrs } 68178064Sume break; 68278064Sume } 68362587Sitojun 68478064Sume case SIOCDIFADDR_IN6: 68578064Sume { 686151539Ssuz struct nd_prefix *pr; 68778064Sume 68878064Sume /* 68978064Sume * If the address being deleted is the only one that owns 69078064Sume * the corresponding prefix, expire the prefix as well. 691120891Sume * XXX: theoretically, we don't have to worry about such 69278064Sume * relationship, since we separate the address management 69378064Sume * and the prefix management. We do this, however, to provide 69478064Sume * as much backward compatibility as possible in terms of 69578064Sume * the ioctl operation. 696151915Ssuz * Note that in6_purgeaddr() will decrement ndpr_refcnt. 69778064Sume */ 698151915Ssuz pr = ia->ia6_ndpr; 69978064Sume in6_purgeaddr(&ia->ia_ifa); 700151915Ssuz if (pr && pr->ndpr_refcnt == 0) 701151915Ssuz prelist_remove(pr); 702126264Smlaier EVENTHANDLER_INVOKE(ifaddr_event, ifp); 70353541Sshin break; 70478064Sume } 70553541Sshin 70678064Sume default: 707194760Srwatson if (ifp == NULL || ifp->if_ioctl == 0) { 708194760Srwatson error = EOPNOTSUPP; 709194760Srwatson goto out; 710194760Srwatson } 711194760Srwatson error = (*ifp->if_ioctl)(ifp, cmd, data); 712194760Srwatson goto out; 71378064Sume } 71453541Sshin 715194760Srwatson error = 0; 716194760Srwatsonout: 717194760Srwatson if (ia != NULL) 718194760Srwatson ifa_free(&ia->ia_ifa); 719194760Srwatson return (error); 72078064Sume} 72153541Sshin 72278064Sume/* 72378064Sume * Update parameters of an IPv6 interface address. 72478064Sume * If necessary, a new entry is created and linked into address chains. 72578064Sume * This function is separated from in6_control(). 72678064Sume * XXX: should this be performed under splnet()? 72778064Sume */ 72878064Sumeint 729171259Sdelphijin6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, 730171259Sdelphij struct in6_ifaddr *ia, int flags) 73178064Sume{ 73278064Sume int error = 0, hostIsNew = 0, plen = -1; 73378064Sume struct sockaddr_in6 dst6; 73478064Sume struct in6_addrlifetime *lt; 735151539Ssuz struct in6_multi_mship *imm; 736151539Ssuz struct in6_multi *in6m_sol; 737148385Sume struct rtentry *rt; 738151539Ssuz int delay; 739165118Sbz char ip6buf[INET6_ADDRSTRLEN]; 74078064Sume 74178064Sume /* Validate parameters */ 74278064Sume if (ifp == NULL || ifra == NULL) /* this maybe redundant */ 743120856Sume return (EINVAL); 74478064Sume 74578064Sume /* 74678064Sume * The destination address for a p2p link must have a family 74778064Sume * of AF_UNSPEC or AF_INET6. 74878064Sume */ 74978064Sume if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && 75078064Sume ifra->ifra_dstaddr.sin6_family != AF_INET6 && 75178064Sume ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) 752120856Sume return (EAFNOSUPPORT); 75378064Sume /* 75478064Sume * validate ifra_prefixmask. don't check sin6_family, netmask 75578064Sume * does not carry fields other than sin6_len. 75678064Sume */ 75778064Sume if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) 758120856Sume return (EINVAL); 75978064Sume /* 76078064Sume * Because the IPv6 address architecture is classless, we require 76178064Sume * users to specify a (non 0) prefix length (mask) for a new address. 76278064Sume * We also require the prefix (when specified) mask is valid, and thus 76378064Sume * reject a non-consecutive mask. 76478064Sume */ 76578064Sume if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) 766120856Sume return (EINVAL); 76778064Sume if (ifra->ifra_prefixmask.sin6_len != 0) { 76878064Sume plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, 769120891Sume (u_char *)&ifra->ifra_prefixmask + 770120891Sume ifra->ifra_prefixmask.sin6_len); 77178064Sume if (plen <= 0) 772120856Sume return (EINVAL); 773120891Sume } else { 77462587Sitojun /* 77595023Ssuz * In this case, ia must not be NULL. We just use its prefix 77678064Sume * length. 77762587Sitojun */ 77878064Sume plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 77978064Sume } 78078064Sume /* 78178064Sume * If the destination address on a p2p interface is specified, 78278064Sume * and the address is a scoped one, validate/set the scope 78378064Sume * zone identifier. 78478064Sume */ 78578064Sume dst6 = ifra->ifra_dstaddr; 786120891Sume if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) != 0 && 78778064Sume (dst6.sin6_family == AF_INET6)) { 788148385Sume struct in6_addr in6_tmp; 789126552Sume u_int32_t zoneid; 79078064Sume 791148385Sume in6_tmp = dst6.sin6_addr; 792148385Sume if (in6_setscope(&in6_tmp, ifp, &zoneid)) 793148385Sume return (EINVAL); /* XXX: should be impossible */ 794148385Sume 795148385Sume if (dst6.sin6_scope_id != 0) { 796148385Sume if (dst6.sin6_scope_id != zoneid) 797148385Sume return (EINVAL); 798148385Sume } else /* user omit to specify the ID. */ 799126552Sume dst6.sin6_scope_id = zoneid; 800148385Sume 801148385Sume /* convert into the internal form */ 802148385Sume if (sa6_embedscope(&dst6, 0)) 803148385Sume return (EINVAL); /* XXX: should be impossible */ 80478064Sume } 80578064Sume /* 80678064Sume * The destination address can be specified only for a p2p or a 80778064Sume * loopback interface. If specified, the corresponding prefix length 80878064Sume * must be 128. 80978064Sume */ 81078064Sume if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { 81178064Sume if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { 812126552Sume /* XXX: noisy message */ 813122059Sume nd6log((LOG_INFO, "in6_update_ifa: a destination can " 814122059Sume "be specified for a p2p or a loopback IF only\n")); 815120856Sume return (EINVAL); 81678064Sume } 81778064Sume if (plen != 128) { 818122059Sume nd6log((LOG_INFO, "in6_update_ifa: prefixlen should " 819122059Sume "be 128 when dstaddr is specified\n")); 820120856Sume return (EINVAL); 82178064Sume } 82278064Sume } 82378064Sume /* lifetime consistency check */ 82478064Sume lt = &ifra->ifra_lifetime; 825151539Ssuz if (lt->ia6t_pltime > lt->ia6t_vltime) 826151539Ssuz return (EINVAL); 82778064Sume if (lt->ia6t_vltime == 0) { 82862587Sitojun /* 82978064Sume * the following log might be noisy, but this is a typical 83078064Sume * configuration mistake or a tool's bug. 83162587Sitojun */ 832122059Sume nd6log((LOG_INFO, 83378064Sume "in6_update_ifa: valid lifetime is 0 for %s\n", 834165118Sbz ip6_sprintf(ip6buf, &ifra->ifra_addr.sin6_addr))); 835151539Ssuz 836151539Ssuz if (ia == NULL) 837151539Ssuz return (0); /* there's nothing to do */ 83878064Sume } 83962587Sitojun 84078064Sume /* 84178064Sume * If this is a new address, allocate a new ifaddr and link it 84278064Sume * into chains. 84378064Sume */ 84478064Sume if (ia == NULL) { 84578064Sume hostIsNew = 1; 84679763Sume /* 84779763Sume * When in6_update_ifa() is called in a process of a received 848120891Sume * RA, it is called under an interrupt context. So, we should 849120891Sume * call malloc with M_NOWAIT. 85079763Sume */ 851120891Sume ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, 852120891Sume M_NOWAIT); 85378064Sume if (ia == NULL) 85478064Sume return (ENOBUFS); 85578064Sume bzero((caddr_t)ia, sizeof(*ia)); 856194602Srwatson ifa_init(&ia->ia_ifa); 857170202Sjinmei LIST_INIT(&ia->ia6_memberships); 858151539Ssuz /* Initialize the address and masks, and put time stamp */ 85978064Sume ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 86078064Sume ia->ia_addr.sin6_family = AF_INET6; 86178064Sume ia->ia_addr.sin6_len = sizeof(ia->ia_addr); 862151539Ssuz ia->ia6_createtime = time_second; 86378064Sume if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { 86478064Sume /* 86578064Sume * XXX: some functions expect that ifa_dstaddr is not 86678064Sume * NULL for p2p interfaces. 86778064Sume */ 868120891Sume ia->ia_ifa.ifa_dstaddr = 869120891Sume (struct sockaddr *)&ia->ia_dstaddr; 87078064Sume } else { 87178064Sume ia->ia_ifa.ifa_dstaddr = NULL; 87253541Sshin } 873108033Shsu ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; 87478064Sume ia->ia_ifp = ifp; 875194760Srwatson ifa_ref(&ia->ia_ifa); /* if_addrhead */ 876191323Srwatson IF_ADDR_LOCK(ifp); 877191340Srwatson TAILQ_INSERT_TAIL(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 878191323Srwatson IF_ADDR_UNLOCK(ifp); 879194907Srwatson 880194971Srwatson ifa_ref(&ia->ia_ifa); /* in6_ifaddrhead */ 881194971Srwatson IN6_IFADDR_WLOCK(); 882194907Srwatson TAILQ_INSERT_TAIL(&V_in6_ifaddrhead, ia, ia_link); 883194971Srwatson IN6_IFADDR_WUNLOCK(); 88478064Sume } 88578064Sume 886151539Ssuz /* update timestamp */ 887151539Ssuz ia->ia6_updatetime = time_second; 888151539Ssuz 88978064Sume /* set prefix mask */ 89078064Sume if (ifra->ifra_prefixmask.sin6_len) { 89178064Sume /* 89278064Sume * We prohibit changing the prefix length of an existing 89378064Sume * address, because 89478064Sume * + such an operation should be rare in IPv6, and 89578064Sume * + the operation would confuse prefix management. 89678064Sume */ 89778064Sume if (ia->ia_prefixmask.sin6_len && 89878064Sume in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { 899122059Sume nd6log((LOG_INFO, "in6_update_ifa: the prefix length of an" 90078064Sume " existing (%s) address should not be changed\n", 901165118Sbz ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 90278064Sume error = EINVAL; 90378064Sume goto unlink; 90453541Sshin } 90578064Sume ia->ia_prefixmask = ifra->ifra_prefixmask; 90678064Sume } 90778064Sume 90878064Sume /* 90978064Sume * If a new destination address is specified, scrub the old one and 91078064Sume * install the new destination. Note that the interface must be 911120891Sume * p2p or loopback (see the check above.) 91278064Sume */ 91378064Sume if (dst6.sin6_family == AF_INET6 && 914120891Sume !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { 91578064Sume int e; 91678064Sume 91778064Sume if ((ia->ia_flags & IFA_ROUTE) != 0 && 918120891Sume (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { 919122059Sume nd6log((LOG_ERR, "in6_update_ifa: failed to remove " 92078064Sume "a route to the old destination: %s\n", 921165118Sbz ip6_sprintf(ip6buf, &ia->ia_addr.sin6_addr))); 92278064Sume /* proceed anyway... */ 923120891Sume } else 92478064Sume ia->ia_flags &= ~IFA_ROUTE; 92578064Sume ia->ia_dstaddr = dst6; 92678064Sume } 92753541Sshin 928148385Sume /* 929148385Sume * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred 930148385Sume * to see if the address is deprecated or invalidated, but initialize 931148385Sume * these members for applications. 932148385Sume */ 933148385Sume ia->ia6_lifetime = ifra->ifra_lifetime; 934148385Sume if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { 935148385Sume ia->ia6_lifetime.ia6t_expire = 936148385Sume time_second + ia->ia6_lifetime.ia6t_vltime; 937148385Sume } else 938148385Sume ia->ia6_lifetime.ia6t_expire = 0; 939148385Sume if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { 940148385Sume ia->ia6_lifetime.ia6t_preferred = 941148385Sume time_second + ia->ia6_lifetime.ia6t_pltime; 942148385Sume } else 943148385Sume ia->ia6_lifetime.ia6t_preferred = 0; 944148385Sume 94578064Sume /* reset the interface and routing table appropriately. */ 94678064Sume if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) 94778064Sume goto unlink; 94878064Sume 94978064Sume /* 950148385Sume * configure address flags. 951148385Sume */ 952148385Sume ia->ia6_flags = ifra->ifra_flags; 953148385Sume /* 954148385Sume * backward compatibility - if IN6_IFF_DEPRECATED is set from the 955148385Sume * userland, make it deprecated. 956148385Sume */ 957148385Sume if ((ifra->ifra_flags & IN6_IFF_DEPRECATED) != 0) { 958148385Sume ia->ia6_lifetime.ia6t_pltime = 0; 959148385Sume ia->ia6_lifetime.ia6t_preferred = time_second; 960148385Sume } 961148385Sume /* 962151539Ssuz * Make the address tentative before joining multicast addresses, 963151539Ssuz * so that corresponding MLD responses would not have a tentative 964151539Ssuz * source address. 965148385Sume */ 966151539Ssuz ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ 967151539Ssuz if (hostIsNew && in6if_do_dad(ifp)) 968148385Sume ia->ia6_flags |= IN6_IFF_TENTATIVE; 969148385Sume 970197138Shrs /* DAD should be performed after ND6_IFF_IFDISABLED is cleared. */ 971197138Shrs if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 972197138Shrs ia->ia6_flags |= IN6_IFF_TENTATIVE; 973197138Shrs 974148385Sume /* 975148385Sume * We are done if we have simply modified an existing address. 976148385Sume */ 977148385Sume if (!hostIsNew) 978148385Sume return (error); 979148385Sume 980148385Sume /* 98178064Sume * Beyond this point, we should call in6_purgeaddr upon an error, 982120891Sume * not just go to unlink. 98378064Sume */ 98478064Sume 985151465Ssuz /* Join necessary multicast groups */ 986151539Ssuz in6m_sol = NULL; 98778064Sume if ((ifp->if_flags & IFF_MULTICAST) != 0) { 98878064Sume struct sockaddr_in6 mltaddr, mltmask; 989148385Sume struct in6_addr llsol; 99078064Sume 991148385Sume /* join solicited multicast addr for new host id */ 992148385Sume bzero(&llsol, sizeof(struct in6_addr)); 993151465Ssuz llsol.s6_addr32[0] = IPV6_ADDR_INT32_MLL; 994148385Sume llsol.s6_addr32[1] = 0; 995148385Sume llsol.s6_addr32[2] = htonl(1); 996148385Sume llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; 997148385Sume llsol.s6_addr8[12] = 0xff; 998148385Sume if ((error = in6_setscope(&llsol, ifp, NULL)) != 0) { 999148385Sume /* XXX: should not happen */ 1000148385Sume log(LOG_ERR, "in6_update_ifa: " 1001148385Sume "in6_setscope failed\n"); 1002148385Sume goto cleanup; 100353541Sshin } 1004151539Ssuz delay = 0; 1005151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1006151539Ssuz /* 1007151539Ssuz * We need a random delay for DAD on the address 1008151539Ssuz * being configured. It also means delaying 1009151539Ssuz * transmission of the corresponding MLD report to 1010151539Ssuz * avoid report collision. 1011197138Shrs * [RFC 4861, Section 6.3.7] 1012151539Ssuz */ 1013151539Ssuz delay = arc4random() % 1014151539Ssuz (MAX_RTR_SOLICITATION_DELAY * hz); 1015151539Ssuz } 1016151539Ssuz imm = in6_joingroup(ifp, &llsol, &error, delay); 1017170202Sjinmei if (imm == NULL) { 1018148385Sume nd6log((LOG_WARNING, 1019148385Sume "in6_update_ifa: addmulti failed for " 1020148385Sume "%s on %s (errno=%d)\n", 1021165118Sbz ip6_sprintf(ip6buf, &llsol), if_name(ifp), 1022148385Sume error)); 1023195102Srwatson goto cleanup; 1024148385Sume } 1025170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, 1026170202Sjinmei imm, i6mm_chain); 1027151539Ssuz in6m_sol = imm->i6mm_maddr; 102853541Sshin 102978064Sume bzero(&mltmask, sizeof(mltmask)); 103078064Sume mltmask.sin6_len = sizeof(struct sockaddr_in6); 103178064Sume mltmask.sin6_family = AF_INET6; 103278064Sume mltmask.sin6_addr = in6mask32; 1033151465Ssuz#define MLTMASK_LEN 4 /* mltmask's masklen (=32bit=4octet) */ 103453541Sshin 103553541Sshin /* 103678064Sume * join link-local all-nodes address 103771207Sitojun */ 103878064Sume bzero(&mltaddr, sizeof(mltaddr)); 103978064Sume mltaddr.sin6_len = sizeof(struct sockaddr_in6); 104078064Sume mltaddr.sin6_family = AF_INET6; 104178064Sume mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1042148385Sume if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1043148385Sume 0) 1044148385Sume goto cleanup; /* XXX: should not fail */ 104571207Sitojun 1046148385Sume /* 1047148385Sume * XXX: do we really need this automatic routes? 1048148385Sume * We should probably reconsider this stuff. Most applications 1049148385Sume * actually do not need the routes, since they usually specify 1050148385Sume * the outgoing interface. 1051148385Sume */ 1052148385Sume rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1053148385Sume if (rt) { 1054174375Sjulian /* XXX: only works in !SCOPEDROUTING case. */ 1055148385Sume if (memcmp(&mltaddr.sin6_addr, 1056148385Sume &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1057151465Ssuz MLTMASK_LEN)) { 1058148385Sume RTFREE_LOCKED(rt); 1059148385Sume rt = NULL; 1060148385Sume } 1061148385Sume } 1062148385Sume if (!rt) { 1063148385Sume error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1064148385Sume (struct sockaddr *)&ia->ia_addr, 1065186119Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1066148385Sume (struct rtentry **)0); 1067148385Sume if (error) 1068148385Sume goto cleanup; 1069151539Ssuz } else { 1070151539Ssuz RTFREE_LOCKED(rt); 1071151539Ssuz } 107278064Sume 1073151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1074151539Ssuz if (!imm) { 1075151539Ssuz nd6log((LOG_WARNING, 1076151539Ssuz "in6_update_ifa: addmulti failed for " 1077151539Ssuz "%s on %s (errno=%d)\n", 1078165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1079151539Ssuz if_name(ifp), error)); 1080151539Ssuz goto cleanup; 1081151539Ssuz } 1082170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1083151539Ssuz 108471207Sitojun /* 108578064Sume * join node information group address 108653541Sshin */ 1087151539Ssuz delay = 0; 1088151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1089151539Ssuz /* 1090151539Ssuz * The spec doesn't say anything about delay for this 1091151539Ssuz * group, but the same logic should apply. 1092151539Ssuz */ 1093151539Ssuz delay = arc4random() % 1094151539Ssuz (MAX_RTR_SOLICITATION_DELAY * hz); 1095151539Ssuz } 1096192895Sjamie if (in6_nigroup(ifp, NULL, -1, &mltaddr.sin6_addr) == 0) { 1097151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 1098151539Ssuz delay); /* XXX jinmei */ 1099151539Ssuz if (!imm) { 1100151539Ssuz nd6log((LOG_WARNING, "in6_update_ifa: " 1101151539Ssuz "addmulti failed for %s on %s " 1102151539Ssuz "(errno=%d)\n", 1103165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1104151539Ssuz if_name(ifp), error)); 1105151539Ssuz /* XXX not very fatal, go on... */ 1106170202Sjinmei } else { 1107170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, 1108170202Sjinmei imm, i6mm_chain); 110962587Sitojun } 1110192895Sjamie } 111153541Sshin 111278064Sume /* 1113148385Sume * join interface-local all-nodes address. 1114148385Sume * (ff01::1%ifN, and ff01::%ifN/32) 111578064Sume */ 1116148385Sume mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1117148385Sume if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) 1118148385Sume != 0) 1119148385Sume goto cleanup; /* XXX: should not fail */ 1120148385Sume /* XXX: again, do we really need the route? */ 1121148385Sume rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1122148385Sume if (rt) { 1123148385Sume if (memcmp(&mltaddr.sin6_addr, 1124148385Sume &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 1125151465Ssuz MLTMASK_LEN)) { 1126148385Sume RTFREE_LOCKED(rt); 1127148385Sume rt = NULL; 1128148385Sume } 1129148385Sume } 1130148385Sume if (!rt) { 1131148385Sume error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, 1132148385Sume (struct sockaddr *)&ia->ia_addr, 1133186119Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1134148385Sume (struct rtentry **)0); 1135148385Sume if (error) 1136148385Sume goto cleanup; 1137148385Sume } else 1138148385Sume RTFREE_LOCKED(rt); 113981115Sume 1140151539Ssuz imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error, 0); 1141151539Ssuz if (!imm) { 1142151539Ssuz nd6log((LOG_WARNING, "in6_update_ifa: " 1143151539Ssuz "addmulti failed for %s on %s " 1144151539Ssuz "(errno=%d)\n", 1145165118Sbz ip6_sprintf(ip6buf, &mltaddr.sin6_addr), 1146151539Ssuz if_name(ifp), error)); 1147151539Ssuz goto cleanup; 1148151539Ssuz } 1149170202Sjinmei LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); 1150151465Ssuz#undef MLTMASK_LEN 115178064Sume } 115253541Sshin 1153151539Ssuz /* 1154151539Ssuz * Perform DAD, if needed. 1155151539Ssuz * XXX It may be of use, if we can administratively 1156151539Ssuz * disable DAD. 1157151539Ssuz */ 1158194760Srwatson if (in6if_do_dad(ifp) && ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) && 1159151539Ssuz (ia->ia6_flags & IN6_IFF_TENTATIVE)) 1160151539Ssuz { 1161151539Ssuz int mindelay, maxdelay; 1162151539Ssuz 1163151539Ssuz delay = 0; 1164151539Ssuz if ((flags & IN6_IFAUPDATE_DADDELAY)) { 1165151539Ssuz /* 1166151539Ssuz * We need to impose a delay before sending an NS 1167151539Ssuz * for DAD. Check if we also needed a delay for the 1168151539Ssuz * corresponding MLD message. If we did, the delay 1169151539Ssuz * should be larger than the MLD delay (this could be 1170151539Ssuz * relaxed a bit, but this simple logic is at least 1171151539Ssuz * safe). 1172191672Sbms * XXX: Break data hiding guidelines and look at 1173191672Sbms * state for the solicited multicast group. 1174151539Ssuz */ 1175151539Ssuz mindelay = 0; 1176151539Ssuz if (in6m_sol != NULL && 1177191672Sbms in6m_sol->in6m_state == MLD_REPORTING_MEMBER) { 1178151539Ssuz mindelay = in6m_sol->in6m_timer; 1179151539Ssuz } 1180151539Ssuz maxdelay = MAX_RTR_SOLICITATION_DELAY * hz; 1181151539Ssuz if (maxdelay - mindelay == 0) 1182151539Ssuz delay = 0; 1183151539Ssuz else { 1184151539Ssuz delay = 1185151539Ssuz (arc4random() % (maxdelay - mindelay)) + 1186151539Ssuz mindelay; 1187151539Ssuz } 1188151539Ssuz } 1189151539Ssuz nd6_dad_start((struct ifaddr *)ia, delay); 1190151539Ssuz } 1191151539Ssuz 1192194760Srwatson KASSERT(hostIsNew, ("in6_update_ifa: !hostIsNew")); 1193194760Srwatson ifa_free(&ia->ia_ifa); 1194120856Sume return (error); 119578064Sume 119678064Sume unlink: 119778064Sume /* 119878064Sume * XXX: if a change of an existing address failed, keep the entry 119978064Sume * anyway. 120078064Sume */ 1201194760Srwatson if (hostIsNew) { 1202194943Srwatson in6_unlink_ifa(ia, ifp); 1203194760Srwatson ifa_free(&ia->ia_ifa); 1204194760Srwatson } 1205120856Sume return (error); 1206148385Sume 1207148385Sume cleanup: 1208194760Srwatson KASSERT(hostIsNew, ("in6_update_ifa: cleanup: !hostIsNew")); 1209194760Srwatson ifa_free(&ia->ia_ifa); 1210148385Sume in6_purgeaddr(&ia->ia_ifa); 1211148385Sume return error; 121253541Sshin} 121353541Sshin 121462587Sitojunvoid 1215171259Sdelphijin6_purgeaddr(struct ifaddr *ifa) 121662587Sitojun{ 121778064Sume struct ifnet *ifp = ifa->ifa_ifp; 121878064Sume struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; 1219170202Sjinmei struct in6_multi_mship *imm; 1220192282Sqingli struct sockaddr_in6 mltaddr, mltmask; 1221192282Sqingli struct rtentry rt0; 1222192282Sqingli struct sockaddr_dl gateway; 1223192282Sqingli struct sockaddr_in6 mask, addr; 1224192282Sqingli int plen, error; 1225192282Sqingli struct rtentry *rt; 1226192282Sqingli struct ifaddr *ifa0, *nifa; 122762587Sitojun 1228192282Sqingli /* 1229192282Sqingli * find another IPv6 address as the gateway for the 1230192282Sqingli * link-local and node-local all-nodes multicast 1231192282Sqingli * address routes 1232192282Sqingli */ 1233194760Srwatson IF_ADDR_LOCK(ifp); 1234192282Sqingli TAILQ_FOREACH_SAFE(ifa0, &ifp->if_addrhead, ifa_link, nifa) { 1235192282Sqingli if ((ifa0->ifa_addr->sa_family != AF_INET6) || 1236192282Sqingli memcmp(&satosin6(ifa0->ifa_addr)->sin6_addr, 1237192282Sqingli &ia->ia_addr.sin6_addr, 1238192282Sqingli sizeof(struct in6_addr)) == 0) 1239192282Sqingli continue; 1240192282Sqingli else 1241192282Sqingli break; 1242192282Sqingli } 1243194760Srwatson if (ifa0 != NULL) 1244194760Srwatson ifa_ref(ifa0); 1245194760Srwatson IF_ADDR_UNLOCK(ifp); 1246192282Sqingli 1247195914Sqingli /* 1248195914Sqingli * Remove the loopback route to the interface address. 1249196871Sqingli * The check for the current setting of "nd6_useloopback" 1250196871Sqingli * is not needed. 1251195914Sqingli */ 1252201282Sqingli if (ia->ia_flags & IFA_RTSELF) { 1253201282Sqingli error = ifa_del_loopback_route((struct ifaddr *)ia, 1254201282Sqingli (struct sockaddr *)&ia->ia_addr); 1255201282Sqingli if (error == 0) 1256201282Sqingli ia->ia_flags &= ~IFA_RTSELF; 1257201282Sqingli } 1258195643Sqingli 125978064Sume /* stop DAD processing */ 126078064Sume nd6_dad_stop(ifa); 126162587Sitojun 1262186119Sqingli IF_AFDATA_LOCK(ifp); 1263186119Sqingli lla_lookup(LLTABLE6(ifp), (LLE_DELETE | LLE_IFADDR), 1264186119Sqingli (struct sockaddr *)&ia->ia_addr); 1265186119Sqingli IF_AFDATA_UNLOCK(ifp); 1266192282Sqingli 126778064Sume /* 1268192282Sqingli * initialize for rtmsg generation 1269192282Sqingli */ 1270192282Sqingli bzero(&gateway, sizeof(gateway)); 1271192282Sqingli gateway.sdl_len = sizeof(gateway); 1272192282Sqingli gateway.sdl_family = AF_LINK; 1273192282Sqingli gateway.sdl_nlen = 0; 1274192282Sqingli gateway.sdl_alen = ifp->if_addrlen; 1275192282Sqingli /* */ 1276192282Sqingli bzero(&rt0, sizeof(rt0)); 1277192282Sqingli rt0.rt_gateway = (struct sockaddr *)&gateway; 1278192282Sqingli memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1279192282Sqingli memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1280192282Sqingli rt_mask(&rt0) = (struct sockaddr *)&mask; 1281192282Sqingli rt_key(&rt0) = (struct sockaddr *)&addr; 1282192282Sqingli rt0.rt_flags = RTF_HOST | RTF_STATIC; 1283192282Sqingli rt_newaddrmsg(RTM_DELETE, ifa, 0, &rt0); 1284192282Sqingli 1285192282Sqingli /* 1286170202Sjinmei * leave from multicast groups we have joined for the interface 1287170202Sjinmei */ 1288170202Sjinmei while ((imm = ia->ia6_memberships.lh_first) != NULL) { 1289170202Sjinmei LIST_REMOVE(imm, i6mm_chain); 1290170202Sjinmei in6_leavegroup(imm); 129162587Sitojun } 129262587Sitojun 1293192282Sqingli /* 1294192282Sqingli * remove the link-local all-nodes address 1295192282Sqingli */ 1296192282Sqingli bzero(&mltmask, sizeof(mltmask)); 1297192282Sqingli mltmask.sin6_len = sizeof(struct sockaddr_in6); 1298192282Sqingli mltmask.sin6_family = AF_INET6; 1299192282Sqingli mltmask.sin6_addr = in6mask32; 1300192282Sqingli 1301192282Sqingli bzero(&mltaddr, sizeof(mltaddr)); 1302192282Sqingli mltaddr.sin6_len = sizeof(struct sockaddr_in6); 1303192282Sqingli mltaddr.sin6_family = AF_INET6; 1304192282Sqingli mltaddr.sin6_addr = in6addr_linklocal_allnodes; 1305192282Sqingli 1306192282Sqingli if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1307192282Sqingli 0) 1308192282Sqingli goto cleanup; 1309192282Sqingli 1310192282Sqingli rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1311192282Sqingli if (rt != NULL && rt->rt_gateway != NULL && 1312192282Sqingli (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1313192282Sqingli &ia->ia_addr.sin6_addr, 1314192282Sqingli sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1315192282Sqingli /* 1316192282Sqingli * if no more IPv6 address exists on this interface 1317192282Sqingli * then remove the multicast address route 1318192282Sqingli */ 1319192282Sqingli if (ifa0 == NULL) { 1320192282Sqingli memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1321192282Sqingli sizeof(mltaddr.sin6_addr)); 1322192282Sqingli RTFREE_LOCKED(rt); 1323192282Sqingli error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1324192282Sqingli (struct sockaddr *)&ia->ia_addr, 1325192282Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1326192282Sqingli (struct rtentry **)0); 1327192282Sqingli if (error) 1328192282Sqingli log(LOG_INFO, "in6_purgeaddr: link-local all-nodes" 1329192282Sqingli "multicast address deletion error\n"); 1330192282Sqingli } else { 1331192282Sqingli /* 1332192282Sqingli * replace the gateway of the route 1333192282Sqingli */ 1334192282Sqingli struct sockaddr_in6 sa; 1335192282Sqingli 1336192282Sqingli bzero(&sa, sizeof(sa)); 1337192282Sqingli sa.sin6_len = sizeof(struct sockaddr_in6); 1338192282Sqingli sa.sin6_family = AF_INET6; 1339192282Sqingli memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1340192282Sqingli sizeof(sa.sin6_addr)); 1341192282Sqingli in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1342192282Sqingli memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1343192282Sqingli RTFREE_LOCKED(rt); 1344192282Sqingli } 1345192282Sqingli } else { 1346192282Sqingli if (rt != NULL) 1347192282Sqingli RTFREE_LOCKED(rt); 1348192282Sqingli } 1349192282Sqingli 1350192282Sqingli /* 1351192282Sqingli * remove the node-local all-nodes address 1352192282Sqingli */ 1353192282Sqingli mltaddr.sin6_addr = in6addr_nodelocal_allnodes; 1354192282Sqingli if ((error = in6_setscope(&mltaddr.sin6_addr, ifp, NULL)) != 1355192282Sqingli 0) 1356192282Sqingli goto cleanup; 1357192282Sqingli 1358192282Sqingli rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); 1359192282Sqingli if (rt != NULL && rt->rt_gateway != NULL && 1360192282Sqingli (memcmp(&satosin6(rt->rt_gateway)->sin6_addr, 1361192282Sqingli &ia->ia_addr.sin6_addr, 1362192282Sqingli sizeof(ia->ia_addr.sin6_addr)) == 0)) { 1363192282Sqingli /* 1364192282Sqingli * if no more IPv6 address exists on this interface 1365192282Sqingli * then remove the multicast address route 1366192282Sqingli */ 1367192282Sqingli if (ifa0 == NULL) { 1368192282Sqingli memcpy(&mltaddr.sin6_addr, &satosin6(rt_key(rt))->sin6_addr, 1369192282Sqingli sizeof(mltaddr.sin6_addr)); 1370192282Sqingli 1371192282Sqingli RTFREE_LOCKED(rt); 1372192282Sqingli error = rtrequest(RTM_DELETE, (struct sockaddr *)&mltaddr, 1373192282Sqingli (struct sockaddr *)&ia->ia_addr, 1374192282Sqingli (struct sockaddr *)&mltmask, RTF_UP, 1375192282Sqingli (struct rtentry **)0); 1376192282Sqingli 1377192282Sqingli if (error) 1378192282Sqingli log(LOG_INFO, "in6_purgeaddr: node-local all-nodes" 1379192282Sqingli "multicast address deletion error\n"); 1380192282Sqingli } else { 1381192282Sqingli /* 1382192282Sqingli * replace the gateway of the route 1383192282Sqingli */ 1384192282Sqingli struct sockaddr_in6 sa; 1385192282Sqingli 1386192282Sqingli bzero(&sa, sizeof(sa)); 1387192282Sqingli sa.sin6_len = sizeof(struct sockaddr_in6); 1388192282Sqingli sa.sin6_family = AF_INET6; 1389192282Sqingli memcpy(&sa.sin6_addr, &satosin6(ifa0->ifa_addr)->sin6_addr, 1390192282Sqingli sizeof(sa.sin6_addr)); 1391192282Sqingli in6_setscope(&sa.sin6_addr, ifa0->ifa_ifp, NULL); 1392192282Sqingli memcpy(rt->rt_gateway, &sa, sizeof(sa)); 1393192282Sqingli RTFREE_LOCKED(rt); 1394192282Sqingli } 1395192282Sqingli } else { 1396192282Sqingli if (rt != NULL) 1397192282Sqingli RTFREE_LOCKED(rt); 1398192282Sqingli } 1399192282Sqingli 1400192282Sqinglicleanup: 1401192282Sqingli 1402192282Sqingli plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1403192282Sqingli if ((ia->ia_flags & IFA_ROUTE) && plen == 128) { 1404192282Sqingli int error; 1405192282Sqingli struct sockaddr *dstaddr; 1406192282Sqingli 1407192282Sqingli /* 1408192282Sqingli * use the interface address if configuring an 1409192282Sqingli * interface address with a /128 prefix len 1410192282Sqingli */ 1411192282Sqingli if (ia->ia_dstaddr.sin6_family == AF_INET6) 1412192282Sqingli dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 1413192282Sqingli else 1414192282Sqingli dstaddr = (struct sockaddr *)&ia->ia_addr; 1415192282Sqingli 1416192282Sqingli error = rtrequest(RTM_DELETE, 1417192282Sqingli (struct sockaddr *)dstaddr, 1418192282Sqingli (struct sockaddr *)&ia->ia_addr, 1419192282Sqingli (struct sockaddr *)&ia->ia_prefixmask, 1420192282Sqingli ia->ia_flags | RTF_HOST, NULL); 1421192282Sqingli if (error != 0) 1422192282Sqingli return; 1423192282Sqingli ia->ia_flags &= ~IFA_ROUTE; 1424192282Sqingli } 1425194760Srwatson if (ifa0 != NULL) 1426194760Srwatson ifa_free(ifa0); 1427192282Sqingli 142878064Sume in6_unlink_ifa(ia, ifp); 142978064Sume} 143078064Sume 143178064Sumestatic void 1432171259Sdelphijin6_unlink_ifa(struct in6_ifaddr *ia, struct ifnet *ifp) 143378064Sume{ 143478064Sume int s = splnet(); 143578064Sume 1436191323Srwatson IF_ADDR_LOCK(ifp); 1437191340Srwatson TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 1438191323Srwatson IF_ADDR_UNLOCK(ifp); 1439194760Srwatson ifa_free(&ia->ia_ifa); /* if_addrhead */ 144062587Sitojun 1441195102Srwatson /* 1442195102Srwatson * Defer the release of what might be the last reference to the 1443195102Srwatson * in6_ifaddr so that it can't be freed before the remainder of the 1444195102Srwatson * cleanup. 1445195102Srwatson */ 1446194971Srwatson IN6_IFADDR_WLOCK(); 1447194907Srwatson TAILQ_REMOVE(&V_in6_ifaddrhead, ia, ia_link); 1448194971Srwatson IN6_IFADDR_WUNLOCK(); 144962587Sitojun 145062587Sitojun /* 1451151915Ssuz * Release the reference to the base prefix. There should be a 1452151915Ssuz * positive reference. 145362587Sitojun */ 1454194907Srwatson if (ia->ia6_ndpr == NULL) { 1455151915Ssuz nd6log((LOG_NOTICE, 1456151915Ssuz "in6_unlink_ifa: autoconf'ed address " 1457194907Srwatson "%p has no prefix\n", ia)); 1458151915Ssuz } else { 1459194907Srwatson ia->ia6_ndpr->ndpr_refcnt--; 1460194907Srwatson ia->ia6_ndpr = NULL; 1461151915Ssuz } 146262587Sitojun 1463151915Ssuz /* 1464151915Ssuz * Also, if the address being removed is autoconf'ed, call 1465151915Ssuz * pfxlist_onlink_check() since the release might affect the status of 1466171260Sdelphij * other (detached) addresses. 1467151915Ssuz */ 1468194907Srwatson if ((ia->ia6_flags & IN6_IFF_AUTOCONF)) { 146978064Sume pfxlist_onlink_check(); 147062587Sitojun } 1471195102Srwatson ifa_free(&ia->ia_ifa); /* in6_ifaddrhead */ 147278064Sume splx(s); 147362587Sitojun} 147462587Sitojun 147578064Sumevoid 1476171259Sdelphijin6_purgeif(struct ifnet *ifp) 147778064Sume{ 147878064Sume struct ifaddr *ifa, *nifa; 147978064Sume 1480191340Srwatson TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, nifa) { 148178064Sume if (ifa->ifa_addr->sa_family != AF_INET6) 148278064Sume continue; 148378064Sume in6_purgeaddr(ifa); 148478064Sume } 148578064Sume 148678064Sume in6_ifdetach(ifp); 148778064Sume} 148878064Sume 148953541Sshin/* 149053541Sshin * SIOC[GAD]LIFADDR. 149162744Sgrog * SIOCGLIFADDR: get first address. (?) 149253541Sshin * SIOCGLIFADDR with IFLR_PREFIX: 149353541Sshin * get first address that matches the specified prefix. 149453541Sshin * SIOCALIFADDR: add the specified address. 149553541Sshin * SIOCALIFADDR with IFLR_PREFIX: 149653541Sshin * add the specified prefix, filling hostid part from 149753541Sshin * the first link-local address. prefixlen must be <= 64. 149853541Sshin * SIOCDLIFADDR: delete the specified address. 149953541Sshin * SIOCDLIFADDR with IFLR_PREFIX: 150053541Sshin * delete the first address that matches the specified prefix. 150153541Sshin * return values: 150253541Sshin * EINVAL on invalid parameters 150353541Sshin * EADDRNOTAVAIL on prefix match failed/specified address not found 150453541Sshin * other values may be returned from in6_ioctl() 150553541Sshin * 150653541Sshin * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. 150753541Sshin * this is to accomodate address naming scheme other than RFC2374, 150853541Sshin * in the future. 150953541Sshin * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 151053541Sshin * address encoding scheme. (see figure on page 8) 151153541Sshin */ 151253541Sshinstatic int 1513171259Sdelphijin6_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 1514171259Sdelphij struct ifnet *ifp, struct thread *td) 151553541Sshin{ 151653541Sshin struct if_laddrreq *iflr = (struct if_laddrreq *)data; 151753541Sshin struct ifaddr *ifa; 151862587Sitojun struct sockaddr *sa; 151953541Sshin 152053541Sshin /* sanity checks */ 152153541Sshin if (!data || !ifp) { 152253541Sshin panic("invalid argument to in6_lifaddr_ioctl"); 1523120891Sume /* NOTREACHED */ 152453541Sshin } 152553541Sshin 152653541Sshin switch (cmd) { 152753541Sshin case SIOCGLIFADDR: 152853541Sshin /* address must be specified on GET with IFLR_PREFIX */ 152953541Sshin if ((iflr->flags & IFLR_PREFIX) == 0) 153053541Sshin break; 153195023Ssuz /* FALLTHROUGH */ 153253541Sshin case SIOCALIFADDR: 153353541Sshin case SIOCDLIFADDR: 153453541Sshin /* address must be specified on ADD and DELETE */ 153562587Sitojun sa = (struct sockaddr *)&iflr->addr; 153662587Sitojun if (sa->sa_family != AF_INET6) 153753541Sshin return EINVAL; 153862587Sitojun if (sa->sa_len != sizeof(struct sockaddr_in6)) 153953541Sshin return EINVAL; 154053541Sshin /* XXX need improvement */ 154162587Sitojun sa = (struct sockaddr *)&iflr->dstaddr; 154262587Sitojun if (sa->sa_family && sa->sa_family != AF_INET6) 154353541Sshin return EINVAL; 154462587Sitojun if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) 154553541Sshin return EINVAL; 154653541Sshin break; 154795023Ssuz default: /* shouldn't happen */ 154862587Sitojun#if 0 154962587Sitojun panic("invalid cmd to in6_lifaddr_ioctl"); 155095023Ssuz /* NOTREACHED */ 155162587Sitojun#else 155253541Sshin return EOPNOTSUPP; 155362587Sitojun#endif 155453541Sshin } 155553541Sshin if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) 155653541Sshin return EINVAL; 155753541Sshin 155853541Sshin switch (cmd) { 155953541Sshin case SIOCALIFADDR: 156053541Sshin { 156153541Sshin struct in6_aliasreq ifra; 156253541Sshin struct in6_addr *hostid = NULL; 156353541Sshin int prefixlen; 156453541Sshin 1565194760Srwatson ifa = NULL; 156653541Sshin if ((iflr->flags & IFLR_PREFIX) != 0) { 156753541Sshin struct sockaddr_in6 *sin6; 156853541Sshin 156953541Sshin /* 157053541Sshin * hostid is to fill in the hostid part of the 157153541Sshin * address. hostid points to the first link-local 157253541Sshin * address attached to the interface. 157353541Sshin */ 157462587Sitojun ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); 157553541Sshin if (!ifa) 157653541Sshin return EADDRNOTAVAIL; 157753541Sshin hostid = IFA_IN6(ifa); 157853541Sshin 1579171260Sdelphij /* prefixlen must be <= 64. */ 158053541Sshin if (64 < iflr->prefixlen) 158153541Sshin return EINVAL; 158253541Sshin prefixlen = iflr->prefixlen; 158353541Sshin 158453541Sshin /* hostid part must be zero. */ 158553541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 1586126552Sume if (sin6->sin6_addr.s6_addr32[2] != 0 || 1587126552Sume sin6->sin6_addr.s6_addr32[3] != 0) { 158853541Sshin return EINVAL; 158953541Sshin } 159053541Sshin } else 159153541Sshin prefixlen = iflr->prefixlen; 159253541Sshin 159353541Sshin /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 159453541Sshin bzero(&ifra, sizeof(ifra)); 1595120891Sume bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); 159653541Sshin 159762587Sitojun bcopy(&iflr->addr, &ifra.ifra_addr, 1598120891Sume ((struct sockaddr *)&iflr->addr)->sa_len); 159953541Sshin if (hostid) { 160053541Sshin /* fill in hostid part */ 160153541Sshin ifra.ifra_addr.sin6_addr.s6_addr32[2] = 1602120891Sume hostid->s6_addr32[2]; 160353541Sshin ifra.ifra_addr.sin6_addr.s6_addr32[3] = 1604120891Sume hostid->s6_addr32[3]; 160553541Sshin } 160653541Sshin 1607120891Sume if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ 160853541Sshin bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 1609120891Sume ((struct sockaddr *)&iflr->dstaddr)->sa_len); 161053541Sshin if (hostid) { 161153541Sshin ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = 1612120891Sume hostid->s6_addr32[2]; 161353541Sshin ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = 1614120891Sume hostid->s6_addr32[3]; 161553541Sshin } 161653541Sshin } 1617194760Srwatson if (ifa != NULL) 1618194760Srwatson ifa_free(ifa); 161953541Sshin 162053541Sshin ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); 1621121168Sume in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); 162253541Sshin 162353541Sshin ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; 162483366Sjulian return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, td); 162553541Sshin } 162653541Sshin case SIOCGLIFADDR: 162753541Sshin case SIOCDLIFADDR: 162853541Sshin { 162953541Sshin struct in6_ifaddr *ia; 163053541Sshin struct in6_addr mask, candidate, match; 163153541Sshin struct sockaddr_in6 *sin6; 163253541Sshin int cmp; 163353541Sshin 163453541Sshin bzero(&mask, sizeof(mask)); 163553541Sshin if (iflr->flags & IFLR_PREFIX) { 163653541Sshin /* lookup a prefix rather than address. */ 1637121168Sume in6_prefixlen2mask(&mask, iflr->prefixlen); 163853541Sshin 163953541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 164053541Sshin bcopy(&sin6->sin6_addr, &match, sizeof(match)); 164153541Sshin match.s6_addr32[0] &= mask.s6_addr32[0]; 164253541Sshin match.s6_addr32[1] &= mask.s6_addr32[1]; 164353541Sshin match.s6_addr32[2] &= mask.s6_addr32[2]; 164453541Sshin match.s6_addr32[3] &= mask.s6_addr32[3]; 164553541Sshin 164653541Sshin /* if you set extra bits, that's wrong */ 164753541Sshin if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) 164853541Sshin return EINVAL; 164953541Sshin 165053541Sshin cmp = 1; 165153541Sshin } else { 165253541Sshin if (cmd == SIOCGLIFADDR) { 165353541Sshin /* on getting an address, take the 1st match */ 165495023Ssuz cmp = 0; /* XXX */ 165553541Sshin } else { 165653541Sshin /* on deleting an address, do exact match */ 1657121168Sume in6_prefixlen2mask(&mask, 128); 165853541Sshin sin6 = (struct sockaddr_in6 *)&iflr->addr; 165953541Sshin bcopy(&sin6->sin6_addr, &match, sizeof(match)); 166053541Sshin 166153541Sshin cmp = 1; 166253541Sshin } 166353541Sshin } 166453541Sshin 1665191323Srwatson IF_ADDR_LOCK(ifp); 1666191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 166753541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 166853541Sshin continue; 166953541Sshin if (!cmp) 167053541Sshin break; 167178064Sume 167278064Sume /* 167378064Sume * XXX: this is adhoc, but is necessary to allow 167478064Sume * a user to specify fe80::/64 (not /10) for a 167578064Sume * link-local address. 167678064Sume */ 1677148385Sume bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); 1678148385Sume in6_clearscope(&candidate); 167953541Sshin candidate.s6_addr32[0] &= mask.s6_addr32[0]; 168053541Sshin candidate.s6_addr32[1] &= mask.s6_addr32[1]; 168153541Sshin candidate.s6_addr32[2] &= mask.s6_addr32[2]; 168253541Sshin candidate.s6_addr32[3] &= mask.s6_addr32[3]; 168353541Sshin if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) 168453541Sshin break; 168553541Sshin } 1686191323Srwatson IF_ADDR_UNLOCK(ifp); 168753541Sshin if (!ifa) 168853541Sshin return EADDRNOTAVAIL; 168953541Sshin ia = ifa2ia6(ifa); 169053541Sshin 169153541Sshin if (cmd == SIOCGLIFADDR) { 1692148385Sume int error; 169378064Sume 169453541Sshin /* fill in the if_laddrreq structure */ 169553541Sshin bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); 1696148385Sume error = sa6_recoverscope( 1697148385Sume (struct sockaddr_in6 *)&iflr->addr); 1698148385Sume if (error != 0) 1699148385Sume return (error); 1700148385Sume 170153541Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 170253541Sshin bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 1703120891Sume ia->ia_dstaddr.sin6_len); 1704148385Sume error = sa6_recoverscope( 1705148385Sume (struct sockaddr_in6 *)&iflr->dstaddr); 1706148385Sume if (error != 0) 1707148385Sume return (error); 170853541Sshin } else 170953541Sshin bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 171053541Sshin 171153541Sshin iflr->prefixlen = 1712120891Sume in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); 171353541Sshin 171495023Ssuz iflr->flags = ia->ia6_flags; /* XXX */ 171553541Sshin 171653541Sshin return 0; 171753541Sshin } else { 171853541Sshin struct in6_aliasreq ifra; 171953541Sshin 172053541Sshin /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 172153541Sshin bzero(&ifra, sizeof(ifra)); 172253541Sshin bcopy(iflr->iflr_name, ifra.ifra_name, 1723120891Sume sizeof(ifra.ifra_name)); 172453541Sshin 172553541Sshin bcopy(&ia->ia_addr, &ifra.ifra_addr, 1726120891Sume ia->ia_addr.sin6_len); 172753541Sshin if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 172853541Sshin bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 1729120891Sume ia->ia_dstaddr.sin6_len); 173062587Sitojun } else { 173162587Sitojun bzero(&ifra.ifra_dstaddr, 173262587Sitojun sizeof(ifra.ifra_dstaddr)); 173353541Sshin } 173453541Sshin bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, 1735120891Sume ia->ia_prefixmask.sin6_len); 173653541Sshin 173753541Sshin ifra.ifra_flags = ia->ia6_flags; 173853541Sshin return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, 1739120891Sume ifp, td); 174053541Sshin } 174153541Sshin } 174253541Sshin } 174353541Sshin 174495023Ssuz return EOPNOTSUPP; /* just for safety */ 174553541Sshin} 174653541Sshin 174753541Sshin/* 174853541Sshin * Initialize an interface's intetnet6 address 174953541Sshin * and routing table entry. 175053541Sshin */ 175178064Sumestatic int 1752171259Sdelphijin6_ifinit(struct ifnet *ifp, struct in6_ifaddr *ia, 1753171259Sdelphij struct sockaddr_in6 *sin6, int newhost) 175453541Sshin{ 175578064Sume int error = 0, plen, ifacount = 0; 175653541Sshin int s = splimp(); 175778064Sume struct ifaddr *ifa; 175853541Sshin 175953541Sshin /* 176053541Sshin * Give the interface a chance to initialize 176153541Sshin * if this is its first address, 176253541Sshin * and to validate the address if necessary. 176353541Sshin */ 1764191323Srwatson IF_ADDR_LOCK(ifp); 1765191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 176678064Sume if (ifa->ifa_addr->sa_family != AF_INET6) 176778064Sume continue; 176878064Sume ifacount++; 176978064Sume } 1770191323Srwatson IF_ADDR_UNLOCK(ifp); 177178064Sume 177278064Sume ia->ia_addr = *sin6; 177378064Sume 1774146883Siedowse if (ifacount <= 1 && ifp->if_ioctl) { 1775146883Siedowse error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 1776146883Siedowse if (error) { 1777146883Siedowse splx(s); 1778146883Siedowse return (error); 1779146883Siedowse } 178053541Sshin } 178178064Sume splx(s); 178253541Sshin 178378064Sume ia->ia_ifa.ifa_metric = ifp->if_metric; 178453541Sshin 178578064Sume /* we could do in(6)_socktrim here, but just omit it at this moment. */ 178678064Sume 178753541Sshin /* 178878064Sume * Special case: 1789124337Sume * If a new destination address is specified for a point-to-point 179078064Sume * interface, install a route to the destination as an interface 1791186119Sqingli * direct route. 1792124337Sume * XXX: the logic below rejects assigning multiple addresses on a p2p 1793159390Sgnn * interface that share the same destination. 179453541Sshin */ 179578064Sume plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ 1796196152Sqingli if (!(ia->ia_flags & IFA_ROUTE) && plen == 128 && 1797196152Sqingli ia->ia_dstaddr.sin6_family == AF_INET6) { 1798159390Sgnn int rtflags = RTF_UP | RTF_HOST; 1799159390Sgnn 1800178888Sjulian error = rtrequest(RTM_ADD, 1801196152Sqingli (struct sockaddr *)&ia->ia_dstaddr, 1802159390Sgnn (struct sockaddr *)&ia->ia_addr, 1803159390Sgnn (struct sockaddr *)&ia->ia_prefixmask, 1804186708Sqingli ia->ia_flags | rtflags, NULL); 1805159390Sgnn if (error != 0) 1806120856Sume return (error); 180778064Sume ia->ia_flags |= IFA_ROUTE; 180853541Sshin } 180953541Sshin 1810195643Sqingli /* 1811195643Sqingli * add a loopback route to self 1812195643Sqingli */ 1813196871Sqingli if (!(ia->ia_flags & IFA_ROUTE) 1814196871Sqingli && (V_nd6_useloopback 1815196871Sqingli || (ifp->if_flags & IFF_LOOPBACK))) { 1816197227Sqingli error = ifa_add_loopback_route((struct ifaddr *)ia, 1817197227Sqingli (struct sockaddr *)&ia->ia_addr); 1818201282Sqingli if (error == 0) 1819201282Sqingli ia->ia_flags |= IFA_RTSELF; 1820195643Sqingli } 1821195643Sqingli 182295023Ssuz /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ 1823186119Sqingli if (newhost) { 1824186119Sqingli struct llentry *ln; 1825192282Sqingli struct rtentry rt; 1826192282Sqingli struct sockaddr_dl gateway; 1827192282Sqingli struct sockaddr_in6 mask, addr; 182853541Sshin 1829186119Sqingli IF_AFDATA_LOCK(ifp); 1830186119Sqingli ia->ia_ifa.ifa_rtrequest = NULL; 1831186119Sqingli 1832186119Sqingli /* XXX QL 1833186119Sqingli * we need to report rt_newaddrmsg 1834186119Sqingli */ 1835186119Sqingli ln = lla_lookup(LLTABLE6(ifp), (LLE_CREATE | LLE_IFADDR | LLE_EXCLUSIVE), 1836186119Sqingli (struct sockaddr *)&ia->ia_addr); 1837186119Sqingli IF_AFDATA_UNLOCK(ifp); 1838186158Skmacy if (ln != NULL) { 1839186119Sqingli ln->la_expire = 0; /* for IPv6 this means permanent */ 1840186119Sqingli ln->ln_state = ND6_LLINFO_REACHABLE; 1841192282Sqingli /* 1842192282Sqingli * initialize for rtmsg generation 1843192282Sqingli */ 1844192282Sqingli bzero(&gateway, sizeof(gateway)); 1845192282Sqingli gateway.sdl_len = sizeof(gateway); 1846192282Sqingli gateway.sdl_family = AF_LINK; 1847192282Sqingli gateway.sdl_nlen = 0; 1848192282Sqingli gateway.sdl_alen = 6; 1849192282Sqingli memcpy(gateway.sdl_data, &ln->ll_addr.mac_aligned, sizeof(ln->ll_addr)); 1850192282Sqingli /* */ 1851186119Sqingli LLE_WUNLOCK(ln); 1852186119Sqingli } 1853192282Sqingli 1854192282Sqingli bzero(&rt, sizeof(rt)); 1855192282Sqingli rt.rt_gateway = (struct sockaddr *)&gateway; 1856192282Sqingli memcpy(&mask, &ia->ia_prefixmask, sizeof(ia->ia_prefixmask)); 1857192282Sqingli memcpy(&addr, &ia->ia_addr, sizeof(ia->ia_addr)); 1858192282Sqingli rt_mask(&rt) = (struct sockaddr *)&mask; 1859192282Sqingli rt_key(&rt) = (struct sockaddr *)&addr; 1860192282Sqingli rt.rt_flags = RTF_UP | RTF_HOST | RTF_STATIC; 1861192282Sqingli rt_newaddrmsg(RTM_ADD, &ia->ia_ifa, 0, &rt); 1862186119Sqingli } 1863186119Sqingli 1864120856Sume return (error); 186553541Sshin} 186653541Sshin 186753541Sshin/* 186853541Sshin * Find an IPv6 interface link-local address specific to an interface. 1869194760Srwatson * ifaddr is returned referenced. 187053541Sshin */ 187153541Sshinstruct in6_ifaddr * 1872171259Sdelphijin6ifa_ifpforlinklocal(struct ifnet *ifp, int ignoreflags) 187353541Sshin{ 187478064Sume struct ifaddr *ifa; 187553541Sshin 1876191323Srwatson IF_ADDR_LOCK(ifp); 1877191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 187853541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 187953541Sshin continue; 188062587Sitojun if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { 188162587Sitojun if ((((struct in6_ifaddr *)ifa)->ia6_flags & 188262587Sitojun ignoreflags) != 0) 188362587Sitojun continue; 1884194760Srwatson ifa_ref(ifa); 188553541Sshin break; 188662587Sitojun } 188753541Sshin } 1888191323Srwatson IF_ADDR_UNLOCK(ifp); 188953541Sshin 1890120856Sume return ((struct in6_ifaddr *)ifa); 189153541Sshin} 189253541Sshin 189353541Sshin 189453541Sshin/* 189553541Sshin * find the internet address corresponding to a given interface and address. 1896194760Srwatson * ifaddr is returned referenced. 189753541Sshin */ 189853541Sshinstruct in6_ifaddr * 1899171259Sdelphijin6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) 190053541Sshin{ 190178064Sume struct ifaddr *ifa; 190253541Sshin 1903191337Srwatson IF_ADDR_LOCK(ifp); 1904191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 190553541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 190653541Sshin continue; 1907194760Srwatson if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) { 1908194760Srwatson ifa_ref(ifa); 190953541Sshin break; 1910194760Srwatson } 191153541Sshin } 1912191337Srwatson IF_ADDR_UNLOCK(ifp); 191353541Sshin 1914120856Sume return ((struct in6_ifaddr *)ifa); 191553541Sshin} 191653541Sshin 191753541Sshin/* 1918165118Sbz * Convert IP6 address to printable (loggable) representation. Caller 1919165118Sbz * has to make sure that ip6buf is at least INET6_ADDRSTRLEN long. 192053541Sshin */ 192153541Sshinstatic char digits[] = "0123456789abcdef"; 192253541Sshinchar * 1923165118Sbzip6_sprintf(char *ip6buf, const struct in6_addr *addr) 192453541Sshin{ 1925208284Salfred int i, cnt = 0, maxcnt = 0, idx = 0, index = 0; 192678064Sume char *cp; 1927126552Sume const u_int16_t *a = (const u_int16_t *)addr; 1928126552Sume const u_int8_t *d; 1929165287Sbz int dcolon = 0, zero = 0; 193053541Sshin 1931165118Sbz cp = ip6buf; 193253541Sshin 193353541Sshin for (i = 0; i < 8; i++) { 1934208284Salfred if (*(a + i) == 0) { 1935208284Salfred cnt++; 1936208284Salfred if (cnt == 1) 1937208284Salfred idx = i; 1938208284Salfred } 1939208284Salfred else if (maxcnt < cnt) { 1940208284Salfred maxcnt = cnt; 1941208284Salfred index = idx; 1942208284Salfred cnt = 0; 1943208284Salfred } 1944208284Salfred } 1945208284Salfred if (maxcnt < cnt) { 1946208284Salfred maxcnt = cnt; 1947208284Salfred index = idx; 1948208284Salfred } 1949208284Salfred 1950208284Salfred for (i = 0; i < 8; i++) { 195153541Sshin if (dcolon == 1) { 195253541Sshin if (*a == 0) { 195353541Sshin if (i == 7) 195453541Sshin *cp++ = ':'; 195553541Sshin a++; 195653541Sshin continue; 195753541Sshin } else 195853541Sshin dcolon = 2; 195953541Sshin } 196053541Sshin if (*a == 0) { 1961208284Salfred if (dcolon == 0 && *(a + 1) == 0 && i == index) { 196253541Sshin if (i == 0) 196353541Sshin *cp++ = ':'; 196453541Sshin *cp++ = ':'; 196553541Sshin dcolon = 1; 196653541Sshin } else { 196753541Sshin *cp++ = '0'; 196853541Sshin *cp++ = ':'; 196953541Sshin } 197053541Sshin a++; 197153541Sshin continue; 197253541Sshin } 197391346Salfred d = (const u_char *)a; 1974165287Sbz /* Try to eliminate leading zeros in printout like in :0001. */ 1975165287Sbz zero = 1; 1976165287Sbz *cp = digits[*d >> 4]; 1977165287Sbz if (*cp != '0') { 1978165287Sbz zero = 0; 1979165287Sbz cp++; 1980165287Sbz } 1981165287Sbz *cp = digits[*d++ & 0xf]; 1982165287Sbz if (zero == 0 || (*cp != '0')) { 1983165287Sbz zero = 0; 1984165287Sbz cp++; 1985165287Sbz } 1986165287Sbz *cp = digits[*d >> 4]; 1987165287Sbz if (zero == 0 || (*cp != '0')) { 1988165287Sbz zero = 0; 1989165287Sbz cp++; 1990165287Sbz } 199153541Sshin *cp++ = digits[*d & 0xf]; 199253541Sshin *cp++ = ':'; 199353541Sshin a++; 199453541Sshin } 1995165118Sbz *--cp = '\0'; 1996165118Sbz return (ip6buf); 199753541Sshin} 199853541Sshin 199953541Sshinint 2000171259Sdelphijin6_localaddr(struct in6_addr *in6) 200153541Sshin{ 200253541Sshin struct in6_ifaddr *ia; 200353541Sshin 200453541Sshin if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) 200553541Sshin return 1; 200653541Sshin 2007194971Srwatson IN6_IFADDR_RLOCK(); 2008194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 200953541Sshin if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, 2010120891Sume &ia->ia_prefixmask.sin6_addr)) { 2011194971Srwatson IN6_IFADDR_RUNLOCK(); 201253541Sshin return 1; 2013120891Sume } 2014120891Sume } 2015194971Srwatson IN6_IFADDR_RUNLOCK(); 201653541Sshin 201753541Sshin return (0); 201853541Sshin} 201953541Sshin 202078064Sumeint 2021171259Sdelphijin6_is_addr_deprecated(struct sockaddr_in6 *sa6) 202278064Sume{ 202378064Sume struct in6_ifaddr *ia; 202478064Sume 2025194971Srwatson IN6_IFADDR_RLOCK(); 2026194907Srwatson TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) { 202778064Sume if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, 202878064Sume &sa6->sin6_addr) && 2029194971Srwatson (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { 2030194971Srwatson IN6_IFADDR_RUNLOCK(); 2031120856Sume return (1); /* true */ 2032194971Srwatson } 203378064Sume 203478064Sume /* XXX: do we still have to go thru the rest of the list? */ 203578064Sume } 2036194971Srwatson IN6_IFADDR_RUNLOCK(); 203778064Sume 2038120856Sume return (0); /* false */ 203978064Sume} 204078064Sume 204153541Sshin/* 204253541Sshin * return length of part which dst and src are equal 204353541Sshin * hard coding... 204453541Sshin */ 204553541Sshinint 2046171259Sdelphijin6_matchlen(struct in6_addr *src, struct in6_addr *dst) 204753541Sshin{ 204853541Sshin int match = 0; 204953541Sshin u_char *s = (u_char *)src, *d = (u_char *)dst; 205053541Sshin u_char *lim = s + 16, r; 205153541Sshin 205253541Sshin while (s < lim) 205353541Sshin if ((r = (*d++ ^ *s++)) != 0) { 205453541Sshin while (r < 128) { 205553541Sshin match++; 205653541Sshin r <<= 1; 205753541Sshin } 205853541Sshin break; 205953541Sshin } else 206053541Sshin match += 8; 206153541Sshin return match; 206253541Sshin} 206353541Sshin 206462587Sitojun/* XXX: to be scope conscious */ 206553541Sshinint 2066171259Sdelphijin6_are_prefix_equal(struct in6_addr *p1, struct in6_addr *p2, int len) 206753541Sshin{ 206853541Sshin int bytelen, bitlen; 206953541Sshin 207053541Sshin /* sanity check */ 207153541Sshin if (0 > len || len > 128) { 207253541Sshin log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", 207353541Sshin len); 2074120856Sume return (0); 207553541Sshin } 207653541Sshin 207753541Sshin bytelen = len / 8; 207853541Sshin bitlen = len % 8; 207953541Sshin 208053541Sshin if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) 2081120856Sume return (0); 2082126184Scperciva if (bitlen != 0 && 2083126184Scperciva p1->s6_addr[bytelen] >> (8 - bitlen) != 208453541Sshin p2->s6_addr[bytelen] >> (8 - bitlen)) 2085120856Sume return (0); 208653541Sshin 2087120856Sume return (1); 208853541Sshin} 208953541Sshin 209053541Sshinvoid 2091171259Sdelphijin6_prefixlen2mask(struct in6_addr *maskp, int len) 209253541Sshin{ 209353541Sshin u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; 209453541Sshin int bytelen, bitlen, i; 209553541Sshin 209653541Sshin /* sanity check */ 209753541Sshin if (0 > len || len > 128) { 209853541Sshin log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", 209953541Sshin len); 210053541Sshin return; 210153541Sshin } 210253541Sshin 210353541Sshin bzero(maskp, sizeof(*maskp)); 210453541Sshin bytelen = len / 8; 210553541Sshin bitlen = len % 8; 210653541Sshin for (i = 0; i < bytelen; i++) 210753541Sshin maskp->s6_addr[i] = 0xff; 210853541Sshin if (bitlen) 210953541Sshin maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; 211053541Sshin} 211153541Sshin 211253541Sshin/* 211353541Sshin * return the best address out of the same scope. if no address was 211453541Sshin * found, return the first valid address from designated IF. 211553541Sshin */ 211653541Sshinstruct in6_ifaddr * 2117171259Sdelphijin6_ifawithifp(struct ifnet *ifp, struct in6_addr *dst) 211853541Sshin{ 211953541Sshin int dst_scope = in6_addrscope(dst), blen = -1, tlen; 212053541Sshin struct ifaddr *ifa; 212153541Sshin struct in6_ifaddr *besta = 0; 212295023Ssuz struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ 212353541Sshin 212453541Sshin dep[0] = dep[1] = NULL; 212553541Sshin 212653541Sshin /* 212753541Sshin * We first look for addresses in the same scope. 212853541Sshin * If there is one, return it. 212953541Sshin * If two or more, return one which matches the dst longest. 213053541Sshin * If none, return one of global addresses assigned other ifs. 213153541Sshin */ 2132191323Srwatson IF_ADDR_LOCK(ifp); 2133191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 213453541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 213553541Sshin continue; 213653541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 213753541Sshin continue; /* XXX: is there any case to allow anycast? */ 213853541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 213953541Sshin continue; /* don't use this interface */ 214053541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 214153541Sshin continue; 214253541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2143181803Sbz if (V_ip6_use_deprecated) 214453541Sshin dep[0] = (struct in6_ifaddr *)ifa; 214553541Sshin continue; 214653541Sshin } 214753541Sshin 214853541Sshin if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { 214953541Sshin /* 215053541Sshin * call in6_matchlen() as few as possible 215153541Sshin */ 215253541Sshin if (besta) { 215353541Sshin if (blen == -1) 215453541Sshin blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); 215553541Sshin tlen = in6_matchlen(IFA_IN6(ifa), dst); 215653541Sshin if (tlen > blen) { 215753541Sshin blen = tlen; 215853541Sshin besta = (struct in6_ifaddr *)ifa; 215953541Sshin } 216053541Sshin } else 216153541Sshin besta = (struct in6_ifaddr *)ifa; 216253541Sshin } 216353541Sshin } 2164191323Srwatson if (besta) { 2165194760Srwatson ifa_ref(&besta->ia_ifa); 2166191323Srwatson IF_ADDR_UNLOCK(ifp); 2167120856Sume return (besta); 2168191323Srwatson } 2169194971Srwatson IF_ADDR_UNLOCK(ifp); 217053541Sshin 2171194971Srwatson IN6_IFADDR_RLOCK(); 2172191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 217353541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 217453541Sshin continue; 217553541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) 217653541Sshin continue; /* XXX: is there any case to allow anycast? */ 217753541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) 217853541Sshin continue; /* don't use this interface */ 217953541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) 218053541Sshin continue; 218153541Sshin if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { 2182181803Sbz if (V_ip6_use_deprecated) 218353541Sshin dep[1] = (struct in6_ifaddr *)ifa; 218453541Sshin continue; 218553541Sshin } 218653541Sshin 2187194760Srwatson if (ifa != NULL) 2188194760Srwatson ifa_ref(ifa); 2189194971Srwatson IN6_IFADDR_RUNLOCK(); 219053541Sshin return (struct in6_ifaddr *)ifa; 219153541Sshin } 2192194971Srwatson IN6_IFADDR_RUNLOCK(); 219353541Sshin 219453541Sshin /* use the last-resort values, that are, deprecated addresses */ 219553541Sshin if (dep[0]) 219653541Sshin return dep[0]; 219753541Sshin if (dep[1]) 219853541Sshin return dep[1]; 219953541Sshin 220053541Sshin return NULL; 220153541Sshin} 220253541Sshin 220353541Sshin/* 220453541Sshin * perform DAD when interface becomes IFF_UP. 220553541Sshin */ 220653541Sshinvoid 2207171259Sdelphijin6_if_up(struct ifnet *ifp) 220853541Sshin{ 220953541Sshin struct ifaddr *ifa; 221053541Sshin struct in6_ifaddr *ia; 221153541Sshin 2212191323Srwatson IF_ADDR_LOCK(ifp); 2213191340Srwatson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 221453541Sshin if (ifa->ifa_addr->sa_family != AF_INET6) 221553541Sshin continue; 221653541Sshin ia = (struct in6_ifaddr *)ifa; 2217151539Ssuz if (ia->ia6_flags & IN6_IFF_TENTATIVE) { 2218151539Ssuz /* 2219151539Ssuz * The TENTATIVE flag was likely set by hand 2220151539Ssuz * beforehand, implicitly indicating the need for DAD. 2221151539Ssuz * We may be able to skip the random delay in this 2222151539Ssuz * case, but we impose delays just in case. 2223151539Ssuz */ 2224151539Ssuz nd6_dad_start(ifa, 2225151539Ssuz arc4random() % (MAX_RTR_SOLICITATION_DELAY * hz)); 2226151539Ssuz } 222753541Sshin } 2228191323Srwatson IF_ADDR_UNLOCK(ifp); 2229151539Ssuz 2230151539Ssuz /* 2231151539Ssuz * special cases, like 6to4, are handled in in6_ifattach 2232151539Ssuz */ 2233151539Ssuz in6_ifattach(ifp, NULL); 223453541Sshin} 223553541Sshin 223678064Sumeint 2237171259Sdelphijin6if_do_dad(struct ifnet *ifp) 223878064Sume{ 223978064Sume if ((ifp->if_flags & IFF_LOOPBACK) != 0) 2240120856Sume return (0); 224178064Sume 2242197138Shrs if (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) 2243197138Shrs return (0); 2244197138Shrs 224578064Sume switch (ifp->if_type) { 224678064Sume#ifdef IFT_DUMMY 224778064Sume case IFT_DUMMY: 224878064Sume#endif 224978064Sume case IFT_FAITH: 225078064Sume /* 225178064Sume * These interfaces do not have the IFF_LOOPBACK flag, 225278064Sume * but loop packets back. We do not have to do DAD on such 225378064Sume * interfaces. We should even omit it, because loop-backed 225478064Sume * NS would confuse the DAD procedure. 225578064Sume */ 2256120856Sume return (0); 225778064Sume default: 225878064Sume /* 225978064Sume * Our DAD routine requires the interface up and running. 226078064Sume * However, some interfaces can be up before the RUNNING 226178064Sume * status. Additionaly, users may try to assign addresses 226278064Sume * before the interface becomes up (or running). 226378064Sume * We simply skip DAD in such a case as a work around. 226478064Sume * XXX: we should rather mark "tentative" on such addresses, 226578064Sume * and do DAD after the interface becomes ready. 226678064Sume */ 2267148887Srwatson if (!((ifp->if_flags & IFF_UP) && 2268148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 2269120856Sume return (0); 227078064Sume 2271120856Sume return (1); 227278064Sume } 227378064Sume} 227478064Sume 227553541Sshin/* 227653541Sshin * Calculate max IPv6 MTU through all the interfaces and store it 227753541Sshin * to in6_maxmtu. 227853541Sshin */ 227953541Sshinvoid 2280171259Sdelphijin6_setmaxmtu(void) 228153541Sshin{ 228253541Sshin unsigned long maxmtu = 0; 228353541Sshin struct ifnet *ifp; 228453541Sshin 2285196481Srwatson IFNET_RLOCK_NOSLEEP(); 2286181887Sjulian for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 2287181888Sjulian ifp = TAILQ_NEXT(ifp, if_list)) { 2288121283Sume /* this function can be called during ifnet initialization */ 2289121283Sume if (!ifp->if_afdata[AF_INET6]) 2290121283Sume continue; 229153541Sshin if ((ifp->if_flags & IFF_LOOPBACK) == 0 && 2292121283Sume IN6_LINKMTU(ifp) > maxmtu) 2293121283Sume maxmtu = IN6_LINKMTU(ifp); 229453541Sshin } 2295196481Srwatson IFNET_RUNLOCK_NOSLEEP(); 2296120891Sume if (maxmtu) /* update only when maxmtu is positive */ 2297181803Sbz V_in6_maxmtu = maxmtu; 229853541Sshin} 229953541Sshin 2300151539Ssuz/* 2301151539Ssuz * Provide the length of interface identifiers to be used for the link attached 2302151539Ssuz * to the given interface. The length should be defined in "IPv6 over 2303151539Ssuz * xxx-link" document. Note that address architecture might also define 2304151539Ssuz * the length for a particular set of address prefixes, regardless of the 2305151539Ssuz * link type. As clarified in rfc2462bis, those two definitions should be 2306151539Ssuz * consistent, and those really are as of August 2004. 2307151539Ssuz */ 2308151539Ssuzint 2309171259Sdelphijin6_if2idlen(struct ifnet *ifp) 2310151539Ssuz{ 2311151539Ssuz switch (ifp->if_type) { 2312151539Ssuz case IFT_ETHER: /* RFC2464 */ 2313151539Ssuz#ifdef IFT_PROPVIRTUAL 2314151539Ssuz case IFT_PROPVIRTUAL: /* XXX: no RFC. treat it as ether */ 2315151539Ssuz#endif 2316151539Ssuz#ifdef IFT_L2VLAN 2317151539Ssuz case IFT_L2VLAN: /* ditto */ 2318151539Ssuz#endif 2319151539Ssuz#ifdef IFT_IEEE80211 2320151539Ssuz case IFT_IEEE80211: /* ditto */ 2321151539Ssuz#endif 2322151539Ssuz#ifdef IFT_MIP 2323151539Ssuz case IFT_MIP: /* ditto */ 2324151539Ssuz#endif 2325219819Sjeff case IFT_INFINIBAND: 2326151539Ssuz return (64); 2327151539Ssuz case IFT_FDDI: /* RFC2467 */ 2328151539Ssuz return (64); 2329151539Ssuz case IFT_ISO88025: /* RFC2470 (IPv6 over Token Ring) */ 2330151539Ssuz return (64); 2331151539Ssuz case IFT_PPP: /* RFC2472 */ 2332151539Ssuz return (64); 2333151539Ssuz case IFT_ARCNET: /* RFC2497 */ 2334151539Ssuz return (64); 2335151539Ssuz case IFT_FRELAY: /* RFC2590 */ 2336151539Ssuz return (64); 2337151539Ssuz case IFT_IEEE1394: /* RFC3146 */ 2338151539Ssuz return (64); 2339151539Ssuz case IFT_GIF: 2340151539Ssuz return (64); /* draft-ietf-v6ops-mech-v2-07 */ 2341151539Ssuz case IFT_LOOP: 2342151539Ssuz return (64); /* XXX: is this really correct? */ 2343151539Ssuz default: 2344151539Ssuz /* 2345151539Ssuz * Unknown link type: 2346151539Ssuz * It might be controversial to use the today's common constant 2347151539Ssuz * of 64 for these cases unconditionally. For full compliance, 2348151539Ssuz * we should return an error in this case. On the other hand, 2349151539Ssuz * if we simply miss the standard for the link type or a new 2350151539Ssuz * standard is defined for a new link type, the IFID length 2351151539Ssuz * is very likely to be the common constant. As a compromise, 2352151539Ssuz * we always use the constant, but make an explicit notice 2353151539Ssuz * indicating the "unknown" case. 2354151539Ssuz */ 2355151539Ssuz printf("in6_if2idlen: unknown link type (%d)\n", ifp->if_type); 2356151539Ssuz return (64); 2357151539Ssuz } 2358151539Ssuz} 2359151539Ssuz 2360186119Sqingli#include <sys/sysctl.h> 2361186119Sqingli 2362186119Sqinglistruct in6_llentry { 2363186119Sqingli struct llentry base; 2364186119Sqingli struct sockaddr_in6 l3_addr6; 2365186119Sqingli}; 2366186119Sqingli 2367186119Sqinglistatic struct llentry * 2368186119Sqingliin6_lltable_new(const struct sockaddr *l3addr, u_int flags) 2369186119Sqingli{ 2370186119Sqingli struct in6_llentry *lle; 2371186119Sqingli 2372186119Sqingli lle = malloc(sizeof(struct in6_llentry), M_LLTABLE, 2373186119Sqingli M_DONTWAIT | M_ZERO); 2374186119Sqingli if (lle == NULL) /* NB: caller generates msg */ 2375186119Sqingli return NULL; 2376186119Sqingli 2377186119Sqingli lle->l3_addr6 = *(const struct sockaddr_in6 *)l3addr; 2378186119Sqingli lle->base.lle_refcnt = 1; 2379186119Sqingli LLE_LOCK_INIT(&lle->base); 2380216022Sbz callout_init_rw(&lle->base.ln_timer_ch, &lle->base.lle_lock, 2381216022Sbz CALLOUT_RETURNUNLOCKED); 2382216022Sbz 2383186119Sqingli return &lle->base; 2384186119Sqingli} 2385186119Sqingli 2386186119Sqingli/* 2387186119Sqingli * Deletes an address from the address table. 2388186119Sqingli * This function is called by the timer functions 2389186119Sqingli * such as arptimer() and nd6_llinfo_timer(), and 2390186119Sqingli * the caller does the locking. 2391186119Sqingli */ 2392186119Sqinglistatic void 2393186119Sqingliin6_lltable_free(struct lltable *llt, struct llentry *lle) 2394186119Sqingli{ 2395186150Skmacy LLE_WUNLOCK(lle); 2396186150Skmacy LLE_LOCK_DESTROY(lle); 2397186119Sqingli free(lle, M_LLTABLE); 2398186119Sqingli} 2399186119Sqingli 2400192476Sqinglistatic void 2401192476Sqingliin6_lltable_prefix_free(struct lltable *llt, 2402192476Sqingli const struct sockaddr *prefix, 2403222143Sqingli const struct sockaddr *mask, 2404222143Sqingli u_int flags) 2405192476Sqingli{ 2406192476Sqingli const struct sockaddr_in6 *pfx = (const struct sockaddr_in6 *)prefix; 2407192476Sqingli const struct sockaddr_in6 *msk = (const struct sockaddr_in6 *)mask; 2408192476Sqingli struct llentry *lle, *next; 2409192476Sqingli register int i; 2410192476Sqingli 2411222143Sqingli /* 2412222143Sqingli * (flags & LLE_STATIC) means deleting all entries 2413222143Sqingli * including static ND6 entries 2414222143Sqingli */ 2415192476Sqingli for (i=0; i < LLTBL_HASHTBL_SIZE; i++) { 2416192476Sqingli LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 2417192476Sqingli if (IN6_ARE_MASKED_ADDR_EQUAL( 2418192476Sqingli &((struct sockaddr_in6 *)L3_ADDR(lle))->sin6_addr, 2419192476Sqingli &pfx->sin6_addr, 2420222143Sqingli &msk->sin6_addr) && 2421222143Sqingli ((flags & LLE_STATIC) || !(lle->la_flags & LLE_STATIC))) { 2422206481Sbz int canceled; 2423206481Sbz 2424206481Sbz canceled = callout_drain(&lle->la_timer); 2425192476Sqingli LLE_WLOCK(lle); 2426206481Sbz if (canceled) 2427206481Sbz LLE_REMREF(lle); 2428192476Sqingli llentry_free(lle); 2429192476Sqingli } 2430192476Sqingli } 2431192476Sqingli } 2432192476Sqingli} 2433192476Sqingli 2434186119Sqinglistatic int 2435201282Sqingliin6_lltable_rtcheck(struct ifnet *ifp, 2436201282Sqingli u_int flags, 2437201282Sqingli const struct sockaddr *l3addr) 2438186119Sqingli{ 2439186119Sqingli struct rtentry *rt; 2440186119Sqingli char ip6buf[INET6_ADDRSTRLEN]; 2441186119Sqingli 2442186119Sqingli KASSERT(l3addr->sa_family == AF_INET6, 2443186119Sqingli ("sin_family %d", l3addr->sa_family)); 2444186119Sqingli 2445186119Sqingli /* XXX rtalloc1 should take a const param */ 2446186119Sqingli rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 2447186119Sqingli if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 2448186119Sqingli struct ifaddr *ifa; 2449186119Sqingli /* 2450186119Sqingli * Create an ND6 cache for an IPv6 neighbor 2451186119Sqingli * that is not covered by our own prefix. 2452186119Sqingli */ 2453186119Sqingli /* XXX ifaof_ifpforaddr should take a const param */ 2454186119Sqingli ifa = ifaof_ifpforaddr(__DECONST(struct sockaddr *, l3addr), ifp); 2455186119Sqingli if (ifa != NULL) { 2456194760Srwatson ifa_free(ifa); 2457186119Sqingli if (rt != NULL) 2458187946Sbz RTFREE_LOCKED(rt); 2459186119Sqingli return 0; 2460186119Sqingli } 2461186119Sqingli log(LOG_INFO, "IPv6 address: \"%s\" is not on the network\n", 2462186119Sqingli ip6_sprintf(ip6buf, &((const struct sockaddr_in6 *)l3addr)->sin6_addr)); 2463186119Sqingli if (rt != NULL) 2464187946Sbz RTFREE_LOCKED(rt); 2465186119Sqingli return EINVAL; 2466186119Sqingli } 2467187946Sbz RTFREE_LOCKED(rt); 2468186119Sqingli return 0; 2469186119Sqingli} 2470186119Sqingli 2471186119Sqinglistatic struct llentry * 2472186119Sqingliin6_lltable_lookup(struct lltable *llt, u_int flags, 2473186119Sqingli const struct sockaddr *l3addr) 2474186119Sqingli{ 2475186119Sqingli const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)l3addr; 2476186119Sqingli struct ifnet *ifp = llt->llt_ifp; 2477186119Sqingli struct llentry *lle; 2478186119Sqingli struct llentries *lleh; 2479186119Sqingli u_int hashkey; 2480186119Sqingli 2481186119Sqingli IF_AFDATA_LOCK_ASSERT(ifp); 2482186119Sqingli KASSERT(l3addr->sa_family == AF_INET6, 2483186119Sqingli ("sin_family %d", l3addr->sa_family)); 2484186119Sqingli 2485186119Sqingli hashkey = sin6->sin6_addr.s6_addr32[3]; 2486186119Sqingli lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 2487186119Sqingli LIST_FOREACH(lle, lleh, lle_next) { 2488186708Sqingli struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)L3_ADDR(lle); 2489186119Sqingli if (lle->la_flags & LLE_DELETED) 2490186119Sqingli continue; 2491186708Sqingli if (bcmp(&sa6->sin6_addr, &sin6->sin6_addr, 2492186708Sqingli sizeof(struct in6_addr)) == 0) 2493186119Sqingli break; 2494186119Sqingli } 2495186119Sqingli 2496186119Sqingli if (lle == NULL) { 2497186119Sqingli if (!(flags & LLE_CREATE)) 2498186119Sqingli return (NULL); 2499186119Sqingli /* 2500186119Sqingli * A route that covers the given address must have 2501186119Sqingli * been installed 1st because we are doing a resolution, 2502186119Sqingli * verify this. 2503186119Sqingli */ 2504186119Sqingli if (!(flags & LLE_IFADDR) && 2505201282Sqingli in6_lltable_rtcheck(ifp, flags, l3addr) != 0) 2506186119Sqingli return NULL; 2507186119Sqingli 2508186119Sqingli lle = in6_lltable_new(l3addr, flags); 2509186119Sqingli if (lle == NULL) { 2510186119Sqingli log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 2511186119Sqingli return NULL; 2512186119Sqingli } 2513186119Sqingli lle->la_flags = flags & ~LLE_CREATE; 2514186119Sqingli if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 2515186119Sqingli bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 2516186119Sqingli lle->la_flags |= (LLE_VALID | LLE_STATIC); 2517186119Sqingli } 2518186119Sqingli 2519186119Sqingli lle->lle_tbl = llt; 2520186119Sqingli lle->lle_head = lleh; 2521186119Sqingli LIST_INSERT_HEAD(lleh, lle, lle_next); 2522186119Sqingli } else if (flags & LLE_DELETE) { 2523186392Sqingli if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 2524186392Sqingli LLE_WLOCK(lle); 2525186392Sqingli lle->la_flags = LLE_DELETED; 2526186392Sqingli LLE_WUNLOCK(lle); 2527198418Sqingli#ifdef DIAGNOSTIC 2528186392Sqingli log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 2529186119Sqingli#endif 2530186392Sqingli } 2531186119Sqingli lle = (void *)-1; 2532186119Sqingli } 2533186119Sqingli if (LLE_IS_VALID(lle)) { 2534186119Sqingli if (flags & LLE_EXCLUSIVE) 2535186119Sqingli LLE_WLOCK(lle); 2536186119Sqingli else 2537186119Sqingli LLE_RLOCK(lle); 2538186119Sqingli } 2539186119Sqingli return (lle); 2540186119Sqingli} 2541186119Sqingli 2542186119Sqinglistatic int 2543186119Sqingliin6_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 2544186119Sqingli{ 2545186119Sqingli struct ifnet *ifp = llt->llt_ifp; 2546186119Sqingli struct llentry *lle; 2547186119Sqingli /* XXX stack use */ 2548186119Sqingli struct { 2549186119Sqingli struct rt_msghdr rtm; 2550186119Sqingli struct sockaddr_in6 sin6; 2551186119Sqingli /* 2552186119Sqingli * ndp.c assumes that sdl is word aligned 2553186119Sqingli */ 2554186119Sqingli#ifdef __LP64__ 2555186119Sqingli uint32_t pad; 2556186119Sqingli#endif 2557186119Sqingli struct sockaddr_dl sdl; 2558186119Sqingli } ndpc; 2559186119Sqingli int i, error; 2560186119Sqingli 2561196864Sqingli if (ifp->if_flags & IFF_LOOPBACK) 2562196864Sqingli return 0; 2563196864Sqingli 2564196535Srwatson LLTABLE_LOCK_ASSERT(); 2565186119Sqingli 2566186119Sqingli error = 0; 2567186119Sqingli for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 2568186119Sqingli LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 2569186119Sqingli struct sockaddr_dl *sdl; 2570186119Sqingli 2571186119Sqingli /* skip deleted or invalid entries */ 2572186119Sqingli if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 2573186119Sqingli continue; 2574186980Sbz /* Skip if jailed and not a valid IP of the prison. */ 2575188144Sjamie if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 2576186980Sbz continue; 2577186119Sqingli /* 2578186119Sqingli * produce a msg made of: 2579186119Sqingli * struct rt_msghdr; 2580186119Sqingli * struct sockaddr_in6 (IPv6) 2581186119Sqingli * struct sockaddr_dl; 2582186119Sqingli */ 2583186119Sqingli bzero(&ndpc, sizeof(ndpc)); 2584186119Sqingli ndpc.rtm.rtm_msglen = sizeof(ndpc); 2585187094Sqingli ndpc.rtm.rtm_version = RTM_VERSION; 2586187094Sqingli ndpc.rtm.rtm_type = RTM_GET; 2587187094Sqingli ndpc.rtm.rtm_flags = RTF_UP; 2588187094Sqingli ndpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 2589186119Sqingli ndpc.sin6.sin6_family = AF_INET6; 2590186119Sqingli ndpc.sin6.sin6_len = sizeof(ndpc.sin6); 2591186119Sqingli bcopy(L3_ADDR(lle), &ndpc.sin6, L3_ADDR_LEN(lle)); 2592186119Sqingli 2593186119Sqingli /* publish */ 2594186119Sqingli if (lle->la_flags & LLE_PUB) 2595186119Sqingli ndpc.rtm.rtm_flags |= RTF_ANNOUNCE; 2596186119Sqingli 2597186119Sqingli sdl = &ndpc.sdl; 2598186119Sqingli sdl->sdl_family = AF_LINK; 2599186119Sqingli sdl->sdl_len = sizeof(*sdl); 2600186119Sqingli sdl->sdl_alen = ifp->if_addrlen; 2601186119Sqingli sdl->sdl_index = ifp->if_index; 2602186119Sqingli sdl->sdl_type = ifp->if_type; 2603186119Sqingli bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 2604186119Sqingli ndpc.rtm.rtm_rmx.rmx_expire = 2605186119Sqingli lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 2606186500Sqingli ndpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 2607186119Sqingli if (lle->la_flags & LLE_STATIC) 2608186119Sqingli ndpc.rtm.rtm_flags |= RTF_STATIC; 2609186119Sqingli ndpc.rtm.rtm_index = ifp->if_index; 2610186119Sqingli error = SYSCTL_OUT(wr, &ndpc, sizeof(ndpc)); 2611186119Sqingli if (error) 2612186119Sqingli break; 2613186119Sqingli } 2614186119Sqingli } 2615186119Sqingli return error; 2616186119Sqingli} 2617186119Sqingli 2618121161Sumevoid * 2619171259Sdelphijin6_domifattach(struct ifnet *ifp) 2620121161Sume{ 2621121161Sume struct in6_ifextra *ext; 2622121161Sume 2623121161Sume ext = (struct in6_ifextra *)malloc(sizeof(*ext), M_IFADDR, M_WAITOK); 2624121161Sume bzero(ext, sizeof(*ext)); 2625121161Sume 2626121161Sume ext->in6_ifstat = (struct in6_ifstat *)malloc(sizeof(struct in6_ifstat), 2627121161Sume M_IFADDR, M_WAITOK); 2628121161Sume bzero(ext->in6_ifstat, sizeof(*ext->in6_ifstat)); 2629121161Sume 2630121161Sume ext->icmp6_ifstat = 2631121161Sume (struct icmp6_ifstat *)malloc(sizeof(struct icmp6_ifstat), 2632121161Sume M_IFADDR, M_WAITOK); 2633121161Sume bzero(ext->icmp6_ifstat, sizeof(*ext->icmp6_ifstat)); 2634121161Sume 2635121161Sume ext->nd_ifinfo = nd6_ifattach(ifp); 2636121161Sume ext->scope6_id = scope6_ifattach(ifp); 2637186119Sqingli ext->lltable = lltable_init(ifp, AF_INET6); 2638186119Sqingli if (ext->lltable != NULL) { 2639186119Sqingli ext->lltable->llt_new = in6_lltable_new; 2640186119Sqingli ext->lltable->llt_free = in6_lltable_free; 2641192476Sqingli ext->lltable->llt_prefix_free = in6_lltable_prefix_free; 2642186119Sqingli ext->lltable->llt_rtcheck = in6_lltable_rtcheck; 2643186119Sqingli ext->lltable->llt_lookup = in6_lltable_lookup; 2644186119Sqingli ext->lltable->llt_dump = in6_lltable_dump; 2645186119Sqingli } 2646191672Sbms 2647191672Sbms ext->mld_ifinfo = mld_domifattach(ifp); 2648191672Sbms 2649121161Sume return ext; 2650121161Sume} 2651121161Sume 2652121161Sumevoid 2653171259Sdelphijin6_domifdetach(struct ifnet *ifp, void *aux) 2654121161Sume{ 2655121161Sume struct in6_ifextra *ext = (struct in6_ifextra *)aux; 2656121161Sume 2657191672Sbms mld_domifdetach(ifp); 2658121161Sume scope6_ifdetach(ext->scope6_id); 2659121161Sume nd6_ifdetach(ext->nd_ifinfo); 2660186119Sqingli lltable_free(ext->lltable); 2661121161Sume free(ext->in6_ifstat, M_IFADDR); 2662121161Sume free(ext->icmp6_ifstat, M_IFADDR); 2663121161Sume free(ext, M_IFADDR); 2664121161Sume} 2665121161Sume 266653541Sshin/* 266795023Ssuz * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be 266853541Sshin * v4 mapped addr or v4 compat addr 266953541Sshin */ 267053541Sshinvoid 267153541Sshinin6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 267253541Sshin{ 2673171259Sdelphij 267453541Sshin bzero(sin, sizeof(*sin)); 267553541Sshin sin->sin_len = sizeof(struct sockaddr_in); 267653541Sshin sin->sin_family = AF_INET; 267753541Sshin sin->sin_port = sin6->sin6_port; 2678120891Sume sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; 267953541Sshin} 268053541Sshin 268153541Sshin/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ 268253541Sshinvoid 268353541Sshinin6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) 268453541Sshin{ 268553541Sshin bzero(sin6, sizeof(*sin6)); 268653541Sshin sin6->sin6_len = sizeof(struct sockaddr_in6); 268753541Sshin sin6->sin6_family = AF_INET6; 268853541Sshin sin6->sin6_port = sin->sin_port; 268953541Sshin sin6->sin6_addr.s6_addr32[0] = 0; 269053541Sshin sin6->sin6_addr.s6_addr32[1] = 0; 269153541Sshin sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; 269253541Sshin sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; 269353541Sshin} 269453541Sshin 269553541Sshin/* Convert sockaddr_in6 into sockaddr_in. */ 269653541Sshinvoid 269753541Sshinin6_sin6_2_sin_in_sock(struct sockaddr *nam) 269853541Sshin{ 269953541Sshin struct sockaddr_in *sin_p; 270053541Sshin struct sockaddr_in6 sin6; 270153541Sshin 270253541Sshin /* 270353541Sshin * Save original sockaddr_in6 addr and convert it 270453541Sshin * to sockaddr_in. 270553541Sshin */ 270653541Sshin sin6 = *(struct sockaddr_in6 *)nam; 270753541Sshin sin_p = (struct sockaddr_in *)nam; 270853541Sshin in6_sin6_2_sin(sin_p, &sin6); 270953541Sshin} 271053541Sshin 271153541Sshin/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ 271253541Sshinvoid 271353541Sshinin6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) 271453541Sshin{ 271553541Sshin struct sockaddr_in *sin_p; 271653541Sshin struct sockaddr_in6 *sin6_p; 271753541Sshin 2718184205Sdes sin6_p = malloc(sizeof *sin6_p, M_SONAME, 2719111119Simp M_WAITOK); 272053541Sshin sin_p = (struct sockaddr_in *)*nam; 272153541Sshin in6_sin_2_v4mapsin6(sin_p, sin6_p); 2722184205Sdes free(*nam, M_SONAME); 272353541Sshin *nam = (struct sockaddr *)sin6_p; 272453541Sshin} 2725