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//========================================================================== // // src/sys/netinet6/in6.c // //========================================================================== //####BSDCOPYRIGHTBEGIN#### // // ------------------------------------------- // // Portions of this software may have been derived from OpenBSD, // FreeBSD or other sources, and are covered by the appropriate // copyright disclaimers included herein. // // Portions created by Red Hat are // Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. // // ------------------------------------------- // //####BSDCOPYRIGHTEND#### //========================================================================== /* $KAME: in6.c,v 1.256 2001/12/24 10:39:29 jinmei Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)in.c 8.2 (Berkeley) 11/15/93 */ #include <sys/param.h> #include <sys/errno.h> #include <sys/malloc.h> #include <sys/socket.h> #include <sys/socketvar.h> #include <sys/sockio.h> #include <net/if.h> #include <net/if_types.h> #include <net/route.h> #include <net/if_dl.h> #include <netinet/in.h> #include <netinet/in_var.h> #ifdef __NetBSD__ #include <net/if_ether.h> #else #include <netinet/if_ether.h> #endif #ifndef SCOPEDROUTING #if defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) #include <netinet/in_systm.h> #include <netinet/ip.h> #include <netinet/in_pcb.h> #endif #endif #include <netinet/ip6.h> #include <netinet6/ip6_var.h> #include <netinet6/nd6.h> #include <netinet6/mld6_var.h> #include <netinet6/ip6_mroute.h> #include <netinet6/in6_ifattach.h> #include <netinet6/scope6_var.h> #ifndef SCOPEDROUTING #if defined(__NetBSD__) || (defined(__bsdi__) && _BSDI_VERSION < 199802) || defined(__FreeBSD__) #include <netinet6/in6_pcb.h> #endif #endif #ifdef MIP6 #include <netinet6/mip6.h> #endif /* MIP6 */ /* * Definitions of some costant IP6 addresses. */ const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; const struct in6_addr in6addr_nodelocal_allnodes = IN6ADDR_NODELOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allnodes = IN6ADDR_LINKLOCAL_ALLNODES_INIT; const struct in6_addr in6addr_linklocal_allrouters = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; const struct in6_addr in6mask0 = IN6MASK0; const struct in6_addr in6mask32 = IN6MASK32; const struct in6_addr in6mask64 = IN6MASK64; const struct in6_addr in6mask96 = IN6MASK96; const struct in6_addr in6mask128 = IN6MASK128; const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6, 0, 0, IN6ADDR_ANY_INIT, 0}; #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, struct ifnet *, struct proc *)); #else static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, struct ifnet *)); #endif static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *, struct sockaddr_in6 *, int)); static void in6_unlink_ifa __P((struct in6_ifaddr *, struct ifnet *)); #if defined(__FreeBSD__) && __FreeBSD__ >= 3 struct in6_multihead in6_multihead; /* XXX BSS initialization */ #else /* * This structure is used to keep track of in6_multi chains which belong to * deleted interface addresses. */ static LIST_HEAD(, multi6_kludge) in6_mk; /* XXX BSS initialization */ struct multi6_kludge { LIST_ENTRY(multi6_kludge) mk_entry; struct ifnet *mk_ifp; struct in6_multihead mk_head; }; #endif #ifdef MEASURE_PERFORMANCE static void in6h_delifa __P((struct in6_ifaddr *)); static void in6h_addhash __P((struct in6hash *)); static void in6h_delhash __P((struct in6hash *)); #endif /* * Subroutine for in6_ifaddloop() and in6_ifremloop(). * This routine does actual work. */ static void in6_ifloop_request(int cmd, struct ifaddr *ifa) { struct sockaddr_in6 all1_sa; struct rtentry *nrt = NULL; int e; bzero(&all1_sa, sizeof(all1_sa)); all1_sa.sin6_family = AF_INET6; all1_sa.sin6_len = sizeof(struct sockaddr_in6); all1_sa.sin6_addr = in6mask128; /* * We specify the address itself as the gateway, and set the * RTF_LLINFO flag, so that the corresponding host route would have * the flag, and thus applications that assume traditional behavior * would be happy. Note that we assume the caller of the function * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest, * which changes the outgoing interface to the loopback interface. */ e = rtrequest(cmd, ifa->ifa_addr, ifa->ifa_addr, (struct sockaddr *)&all1_sa, RTF_UP|RTF_HOST|RTF_LLINFO, &nrt); if (e != 0) { log(LOG_ERR, "in6_ifloop_request: " "%s operation failed for %s (errno=%d)\n", cmd == RTM_ADD ? "ADD" : "DELETE", ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr), e); } /* * Make sure rt_ifa be equal to IFA, the second argument of the * function. * We need this because when we refer to rt_ifa->ia6_flags in * ip6_input, we assume that the rt_ifa points to the address instead * of the loopback address. */ if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) { IFAFREE(nrt->rt_ifa); IFAREF(ifa); nrt->rt_ifa = ifa; } /* * Report the addition/removal of the address to the routing socket. * XXX: since we called rtinit for a p2p interface with a destination, * we end up reporting twice in such a case. Should we rather * omit the second report? */ if (nrt) { rt_newaddrmsg(cmd, ifa, e, nrt); if (cmd == RTM_DELETE) { if (nrt->rt_refcnt <= 0) { /* XXX: we should free the entry ourselves. */ nrt->rt_refcnt++; rtfree(nrt); } } else { /* the cmd must be RTM_ADD here */ nrt->rt_refcnt--; } } } /* * Add ownaddr as loopback rtentry. We previously add the route only if * necessary (ex. on a p2p link). However, since we now manage addresses * separately from prefixes, we should always add the route. We can't * rely on the cloning mechanism from the corresponding interface route * any more. */ static void in6_ifaddloop(struct ifaddr *ifa) { struct rtentry *rt; /* If there is no loopback entry, allocate one. */ rt = rtalloc1(ifa->ifa_addr, 0 #ifdef __FreeBSD__ , 0 #endif /* __FreeBSD__ */ ); if (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 || (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) in6_ifloop_request(RTM_ADD, ifa); if (rt) rt->rt_refcnt--; } /* * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(), * if it exists. */ static void in6_ifremloop(struct ifaddr *ifa) { struct in6_ifaddr *ia; struct rtentry *rt; int ia_count = 0; /* * Some of BSD variants do not remove cloned routes * from an interface direct route, when removing the direct route * (see comments in net/net_osdep.h). Even for variants that do remove * cloned routes, they could fail to remove the cloned routes when * we handle multple addresses that share a common prefix. * So, we should remove the route corresponding to the deleted address * regardless of the result of in6_is_ifloop_auto(). */ /* * Delete the entry only if exact one ifa exists. More than one ifa * can exist if we assign a same single address to multiple * (probably p2p) interfaces. * XXX: we should avoid such a configuration in IPv6... */ for (ia = in6_ifaddr; ia; ia = ia->ia_next) { if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ia->ia_addr.sin6_addr)) { ia_count++; if (ia_count > 1) break; } } if (ia_count == 1) { /* * Before deleting, check if a corresponding loopbacked host * route surely exists. With this check, we can avoid to * delete an interface direct route whose destination is same * as the address being removed. This can happen when remofing * a subnet-router anycast address on an interface attahced * to a shared medium. */ rt = rtalloc1(ifa->ifa_addr, 0 #ifdef __FreeBSD__ , 0 #endif /* __FreeBSD__ */ ); if (rt != NULL && (rt->rt_flags & RTF_HOST) != 0 && (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) { rt->rt_refcnt--; in6_ifloop_request(RTM_DELETE, ifa); } } } int in6_ifindex2scopeid(idx) int idx; { struct ifnet *ifp; struct ifaddr *ifa; struct sockaddr_in6 *sin6; if (idx < 0 || if_index < idx) return -1; #if defined(__FreeBSD__) && __FreeBSD__ >= 5 ifp = ifnet_byindex(idx); #else ifp = ifindex2ifnet[idx]; #endif if (!ifp) return -1; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr->sa_family != AF_INET6) continue; sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) return sin6->sin6_scope_id & 0xffff; } return -1; } int in6_mask2len(mask, lim0) struct in6_addr *mask; u_char *lim0; { int x = 0, y; u_char *lim = lim0, *p; if (lim0 == NULL || lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */ lim = (u_char *)mask + sizeof(*mask); for (p = (u_char *)mask; p < lim; x++, p++) { if (*p != 0xff) break; } y = 0; if (p < lim) { for (y = 0; y < 8; y++) { if ((*p & (0x80 >> y)) == 0) break; } } /* * when the limit pointer is given, do a stricter check on the * remaining bits. */ if (p < lim) { if (y != 0 && (*p & (0x00ff >> y)) != 0) return(-1); for (p = p + 1; p < lim; p++) if (*p != 0) return(-1); } return x * 8 + y; } #define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) #define ia62ifa(ia6) (&((ia6)->ia_ifa)) int #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) in6_control(so, cmd, data, ifp, p) struct socket *so; u_long cmd; caddr_t data; struct ifnet *ifp; struct proc *p; #else in6_control(so, cmd, data, ifp) struct socket *so; u_long cmd; caddr_t data; struct ifnet *ifp; #endif { struct in6_ifreq *ifr = (struct in6_ifreq *)data; struct in6_ifaddr *ia = NULL; struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; struct sockaddr_in6 *sa6; #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) time_t time_second = (time_t)time.tv_sec; #endif switch (cmd) { case SIOCGETSGCNT_IN6: case SIOCGETMIFCNT_IN6: return (mrt6_ioctl(cmd, data)); } switch(cmd) { case SIOCAADDRCTL_POLICY: case SIOCDADDRCTL_POLICY: return(in6_src_ioctl(cmd, data)); } #ifdef MIP6 switch (cmd) { case SIOCENABLEMN: case SIOCENABLEHA: return(mip6_ioctl(cmd, data)); case SIOCGBC: return(mip6_ioctl(cmd, data)); } #endif /* MIP6 */ if (ifp == NULL) return(EOPNOTSUPP); switch (cmd) { case SIOCSNDFLUSH_IN6: case SIOCSPFXFLUSH_IN6: case SIOCSRTRFLUSH_IN6: case SIOCSDEFIFACE_IN6: case SIOCSIFINFO_FLAGS: /* fall through */ case OSIOCGIFINFO_IN6: case SIOCGIFINFO_IN6: case SIOCGDRLST_IN6: case SIOCGPRLST_IN6: case SIOCGNBRINFO_IN6: case SIOCGDEFIFACE_IN6: return(nd6_ioctl(cmd, data, ifp)); } switch (cmd) { case SIOCSIFPREFIX_IN6: case SIOCDIFPREFIX_IN6: case SIOCAIFPREFIX_IN6: case SIOCCIFPREFIX_IN6: case SIOCSGIFPREFIX_IN6: case SIOCGIFPREFIX_IN6: log(LOG_NOTICE, "prefix ioctls are now invalidated. " "please use ifconfig.\n"); return(EOPNOTSUPP); } switch (cmd) { case SIOCSSCOPE6: return(scope6_set(ifp, ifr->ifr_ifru.ifru_scope_id)); case SIOCGSCOPE6: return(scope6_get(ifp, ifr->ifr_ifru.ifru_scope_id)); case SIOCGSCOPE6DEF: return(scope6_get_default(ifr->ifr_ifru.ifru_scope_id)); } switch (cmd) { case SIOCALIFADDR: case SIOCDLIFADDR: /* fall through */ case SIOCGLIFADDR: #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) return in6_lifaddr_ioctl(so, cmd, data, ifp, p); #else return in6_lifaddr_ioctl(so, cmd, data, ifp); #endif } /* * Find address for this interface, if it exists. * * In netinet code, we have checked ifra_addr in SIOCSIF*ADDR operation * only, and used the first interface address as the target of other * operations (without checking ifra_addr). This was because netinet * code/API assumed at most 1 interface address per interface. * Since IPv6 allows a node to assign multiple addresses * on a single interface, we almost always look and check the * presence of ifra_addr, and reject invalid ones here. * It also decreases duplicated code among SIOC*_IN6 operations. */ switch (cmd) { case SIOCAIFADDR_IN6: case SIOCSIFPHYADDR_IN6: sa6 = &ifra->ifra_addr; break; case SIOCSIFADDR_IN6: case SIOCGIFADDR_IN6: case SIOCSIFDSTADDR_IN6: case SIOCSIFNETMASK_IN6: case SIOCGIFDSTADDR_IN6: case SIOCGIFNETMASK_IN6: case SIOCDIFADDR_IN6: case SIOCGIFPSRCADDR_IN6: case SIOCGIFPDSTADDR_IN6: case SIOCGIFAFLAG_IN6: case SIOCSNDFLUSH_IN6: case SIOCSPFXFLUSH_IN6: case SIOCSRTRFLUSH_IN6: case SIOCGIFALIFETIME_IN6: case SIOCSIFALIFETIME_IN6: case SIOCGIFSTAT_IN6: case SIOCGIFSTAT_ICMP6: sa6 = &ifr->ifr_addr; break; default: sa6 = NULL; break; } if (sa6 && sa6->sin6_family == AF_INET6) { if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { if (sa6->sin6_addr.s6_addr16[1] == 0) { /* link ID is not embedded by the user */ sa6->sin6_addr.s6_addr16[1] = htons(ifp->if_index); } else if (sa6->sin6_addr.s6_addr16[1] != htons(ifp->if_index)) { return(EINVAL); /* link ID contradicts */ } if (sa6->sin6_scope_id) { if (sa6->sin6_scope_id != (u_int32_t)ifp->if_index) return(EINVAL); sa6->sin6_scope_id = 0; /* XXX: good way? */ } } ia = in6ifa_ifpwithaddr(ifp, &sa6->sin6_addr); } else ia = NULL; switch (cmd) { case SIOCSIFADDR_IN6: case SIOCSIFDSTADDR_IN6: case SIOCSIFNETMASK_IN6: /* * Since IPv6 allows a node to assign multiple addresses * on a single interface, SIOCSIFxxx ioctls are deprecated. */ return(EINVAL); case SIOCDIFADDR_IN6: /* * for IPv4, we look for existing in_ifaddr here to allow * "ifconfig if0 delete" to remove the first IPv4 address on * the interface. For IPv6, as the spec allows multiple * interface address from the day one, we consider "remove the * first one" semantics to be not preferable. */ if (ia == NULL) return(EADDRNOTAVAIL); /* FALLTHROUGH */ case SIOCAIFADDR_IN6: /* * We always require users to specify a valid IPv6 address for * the corresponding operation. */ if (ifra->ifra_addr.sin6_family != AF_INET6 || ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6)) return(EAFNOSUPPORT); break; case SIOCGIFADDR_IN6: /* This interface is basically deprecated. use SIOCGIFCONF. */ /* fall through */ case SIOCGIFAFLAG_IN6: case SIOCGIFNETMASK_IN6: case SIOCGIFDSTADDR_IN6: case SIOCGIFALIFETIME_IN6: /* must think again about its semantics */ if (ia == NULL) return(EADDRNOTAVAIL); break; case SIOCSIFALIFETIME_IN6: { struct in6_addrlifetime *lt; if (ia == NULL) return(EADDRNOTAVAIL); /* sanity for overflow - beware unsigned */ lt = &ifr->ifr_ifru.ifru_lifetime; if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME && lt->ia6t_vltime + time_second < time_second) { return EINVAL; } if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME && lt->ia6t_pltime + time_second < time_second) { return EINVAL; } break; } } switch (cmd) { case SIOCGIFADDR_IN6: ifr->ifr_addr = ia->ia_addr; break; case SIOCGIFDSTADDR_IN6: if ((ifp->if_flags & IFF_POINTOPOINT) == 0) return(EINVAL); /* * XXX: should we check if ifa_dstaddr is NULL and return * an error? */ ifr->ifr_dstaddr = ia->ia_dstaddr; break; case SIOCGIFNETMASK_IN6: ifr->ifr_addr = ia->ia_prefixmask; break; case SIOCGIFAFLAG_IN6: ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; break; case SIOCGIFSTAT_IN6: if (ifp == NULL) return EINVAL; if (in6_ifstat == NULL || ifp->if_index >= in6_ifstatmax || in6_ifstat[ifp->if_index] == NULL) { /* return EAFNOSUPPORT? */ bzero(&ifr->ifr_ifru.ifru_stat, sizeof(ifr->ifr_ifru.ifru_stat)); } else ifr->ifr_ifru.ifru_stat = *in6_ifstat[ifp->if_index]; break; case SIOCGIFSTAT_ICMP6: if (ifp == NULL) return EINVAL; if (icmp6_ifstat == NULL || ifp->if_index >= icmp6_ifstatmax || icmp6_ifstat[ifp->if_index] == NULL) { /* return EAFNOSUPPORT? */ bzero(&ifr->ifr_ifru.ifru_stat, sizeof(ifr->ifr_ifru.ifru_icmp6stat)); } else ifr->ifr_ifru.ifru_icmp6stat = *icmp6_ifstat[ifp->if_index]; break; case SIOCGIFALIFETIME_IN6: ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { time_t maxexpire; struct in6_addrlifetime *retlt = &ifr->ifr_ifru.ifru_lifetime; /* * XXX: adjust expiration time assuming time_t is * signed. */ maxexpire = (-1) & ~(1 << ((sizeof(maxexpire) * 8) - 1)); if (ia->ia6_lifetime.ia6t_vltime < maxexpire - ia->ia6_updatetime) { retlt->ia6t_expire = ia->ia6_updatetime + ia->ia6_lifetime.ia6t_vltime; } else retlt->ia6t_expire = maxexpire; } if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { time_t maxexpire; struct in6_addrlifetime *retlt = &ifr->ifr_ifru.ifru_lifetime; /* * XXX: adjust expiration time assuming time_t is * signed. */ maxexpire = (-1) & ~(1 << ((sizeof(maxexpire) * 8) - 1)); if (ia->ia6_lifetime.ia6t_pltime < maxexpire - ia->ia6_updatetime) { retlt->ia6t_preferred = ia->ia6_updatetime + ia->ia6_lifetime.ia6t_pltime; } else retlt->ia6t_preferred = maxexpire; } break; case SIOCSIFALIFETIME_IN6: ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; /* for sanity */ if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { ia->ia6_lifetime.ia6t_expire = time_second + ia->ia6_lifetime.ia6t_vltime; } else ia->ia6_lifetime.ia6t_expire = 0; if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { ia->ia6_lifetime.ia6t_preferred = time_second + ia->ia6_lifetime.ia6t_pltime; } else ia->ia6_lifetime.ia6t_preferred = 0; break; case SIOCAIFADDR_IN6: { int i, error = 0; struct nd_prefix pr0, *pr; /* * first, make or update the interface address structure, * and link it to the list. */ if ((error = in6_update_ifa(ifp, ifra, ia)) != 0) return(error); if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr)) == NULL) { /* * this can happen when the user specify the 0 valid * lifetime. */ break; } /* * then, make the prefix on-link on the interface. * XXX: we'd rather create the prefix before the address, but * we need at least one address to install the corresponding * interface route, so we configure the address first. */ /* * convert mask to prefix length (prefixmask has already * been validated in in6_update_ifa(). */ bzero(&pr0, sizeof(pr0)); pr0.ndpr_ifp = ifp; pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, NULL); if (pr0.ndpr_plen == 128) break; /* we don't need to install a host route. */ pr0.ndpr_prefix = ifra->ifra_addr; pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr; /* apply the mask for safety. */ for (i = 0; i < 4; i++) { pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= ifra->ifra_prefixmask.sin6_addr.s6_addr32[i]; } /* * XXX: since we don't have an API to set prefix (not address) * lifetimes, we just use the same lifetimes as addresses. * The (temporarily) installed lifetimes can be overridden by * later advertised RAs (when accept_rtadv is non 0), which is * an intended behavior. */ pr0.ndpr_raf_onlink = 1; /* should be configurable? */ pr0.ndpr_raf_auto = ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0); pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime; pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime; /* add the prefix if there's one. */ if ((pr = nd6_prefix_lookup(&pr0)) == NULL) { /* * nd6_prelist_add will install the corresponding * interface route. */ if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0) return(error); if (pr == NULL) { log(LOG_ERR, "nd6_prelist_add succeeded but " "no prefix\n"); return(EINVAL); /* XXX panic here? */ } } if ((ia->ia6_flags & IN6_IFF_AUTOCONF) && ia->ia6_ndpr == NULL) { /* new autoconfed addr */ ia->ia6_ndpr = pr; pr->ndpr_refcnt++; /* * If this is the first autoconf address from * the prefix, create a temporary address * as well (when specified). */ if (ip6_use_tempaddr && pr->ndpr_refcnt == 1) { int e; if ((e = in6_tmpifadd(ia, 1)) != 0) { log(LOG_NOTICE, "in6_control: failed " "to create a temporary address, " "errno=%d\n", e); } } } /* * this might affect the status of autoconfigured addresses, * that is, this address might make other addresses detached. */ pfxlist_onlink_check(); break; } case SIOCDIFADDR_IN6: { int i = 0, purgeprefix = 0; struct nd_prefix pr0, *pr = NULL; /* * If the address being deleted is the only one that owns * the corresponding prefix, expire the prefix as well. * XXX: theoretically, we don't have to worry about such * relationship, since we separate the address management * and the prefix management. We do this, however, to provide * as much backward compatibility as possible in terms of * the ioctl operation. */ bzero(&pr0, sizeof(pr0)); pr0.ndpr_ifp = ifp; pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); if (pr0.ndpr_plen == 128) goto purgeaddr; pr0.ndpr_prefix = ia->ia_addr; pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr; for (i = 0; i < 4; i++) { pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &= ia->ia_prefixmask.sin6_addr.s6_addr32[i]; } /* * The logic of the following condition is a bit complicated. * We expire the prefix when * 1. the address obeys autoconfiguration and it is the * only owner of the associated prefix, or * 2. the address does not obey autoconf and there is no * other owner of the prefix. */ if ((pr = nd6_prefix_lookup(&pr0)) != NULL && (((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 && pr->ndpr_refcnt == 1) || ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 && pr->ndpr_refcnt == 0))) purgeprefix = 1; purgeaddr: in6_purgeaddr(&ia->ia_ifa); if (pr && purgeprefix) prelist_remove(pr); break; } default: if (ifp == NULL || ifp->if_ioctl == 0) return(EOPNOTSUPP); return((*ifp->if_ioctl)(ifp, cmd, data)); } return(0); } /* * Update parameters of an IPv6 interface address. * If necessary, a new entry is created and linked into address chains. * This function is separated from in6_control(). * XXX: should this be performed under splnet()? */ static int _in6_update_ifa(struct ifnet *ifp, struct in6_aliasreq *ifra, struct in6_ifaddr *ia) { int error = 0, hostIsNew = 0, plen = -1; struct in6_ifaddr *oia; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) struct ifaddr *ifa; #endif struct sockaddr_in6 dst6; struct in6_addrlifetime *lt; struct in6_multi_mship *imm; #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) time_t time_second = (time_t)time.tv_sec; #endif #ifdef MEASURE_PERFORMANCE int new_ifa = 0; #endif struct rtentry *rt; /* Validate parameters */ if (ifp == NULL || ifra == NULL) /* this maybe redundant */ return(EINVAL); /* * The destination address for a p2p link must have a family * of AF_UNSPEC or AF_INET6. */ if ((ifp->if_flags & IFF_POINTOPOINT) != 0 && ifra->ifra_dstaddr.sin6_family != AF_INET6 && ifra->ifra_dstaddr.sin6_family != AF_UNSPEC) return(EAFNOSUPPORT); /* * validate ifra_prefixmask. don't check sin6_family, netmask * does not carry fields other than sin6_len. */ if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6)) return(EINVAL); /* * Because the IPv6 address architecture is classless, we require * users to specify a (non 0) prefix length (mask) for a new address. * We also require the prefix (when specified) mask is valid, and thus * reject a non-consecutive mask. */ if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0) return(EINVAL); if (ifra->ifra_prefixmask.sin6_len != 0) { plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr, (u_char *)&ifra->ifra_prefixmask + ifra->ifra_prefixmask.sin6_len); if (plen <= 0) return(EINVAL); } else { /* * In this case, ia must not be NULL. We just use its prefix * length. */ plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); } /* * If the destination address on a p2p interface is specified, * and the address is a scoped one, validate/set the scope * zone identifier. */ dst6 = ifra->ifra_dstaddr; if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) && (dst6.sin6_family == AF_INET6)) { int64_t zoneid; #ifndef SCOPEDROUTING if ((error = in6_recoverscope(&dst6, &ifra->ifra_dstaddr.sin6_addr, ifp)) != 0) return(error); #endif if ((zoneid = in6_addr2zoneid(ifp, &dst6.sin6_addr)) < 0) return(EINVAL); if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */ dst6.sin6_scope_id = zoneid; else if (dst6.sin6_scope_id != zoneid) return(EINVAL); /* scope ID mismatch. */ if ((error = in6_embedscope(&dst6.sin6_addr, &dst6)) != 0) return(error); #ifndef SCOPEDROUTING dst6.sin6_scope_id = 0; /* XXX */ #endif } /* * The destination address can be specified only for a p2p or a * loopback interface. If specified, the corresponding prefix length * must be 128. */ if (ifra->ifra_dstaddr.sin6_family == AF_INET6) { #ifdef FORCE_P2PPLEN int i; #endif if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) { /* XXX: noisy message */ log(LOG_INFO, "in6_update_ifa: a destination can be " "specified for a p2p or a loopback IF only\n"); return(EINVAL); } if (plen != 128) { log(LOG_INFO, "in6_update_ifa: prefixlen should be " "128 when dstaddr is specified\n"); #ifdef FORCE_P2PPLEN /* * To be compatible with old configurations, * such as ifconfig gif0 inet6 2001::1 2001::2 * prefixlen 126, we override the specified * prefixmask as if the prefix length was 128. */ ifra->ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); for (i = 0; i < 4; i++) ifra->ifra_prefixmask.sin6_addr.s6_addr32[i] = 0xffffffff; plen = 128; #else return(EINVAL); #endif } } /* lifetime consistency check */ lt = &ifra->ifra_lifetime; if (lt->ia6t_pltime > lt->ia6t_vltime) return(EINVAL); if (lt->ia6t_vltime == 0) { /* * the following log might be noisy, but this is a typical * configuration mistake or a tool's bug. */ log(LOG_INFO, "in6_update_ifa: valid lifetime is 0 for %s\n", ip6_sprintf(&ifra->ifra_addr.sin6_addr)); if (ia == NULL) return(0); /* there's nothing to do */ } /* * If this is a new address, allocate a new ifaddr and link it * into chains. */ if (ia == NULL) { hostIsNew = 1; /* * When in6_update_ifa() is called in a process of a received * RA, it is called under an interrupt context. So, we should * call malloc with M_NOWAIT. */ ia = (struct in6_ifaddr *) malloc(sizeof(*ia), M_IFADDR, M_NOWAIT); if (ia == NULL) return (ENOBUFS); bzero((caddr_t)ia, sizeof(*ia)); LIST_INIT(&ia->ia6_memberships); /* Initialize the address and masks, and put time stamp */ ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; ia->ia_addr.sin6_family = AF_INET6; ia->ia_addr.sin6_len = sizeof(ia->ia_addr); ia->ia6_createtime = ia->ia6_updatetime = time_second; if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) { /* * XXX: some functions expect that ifa_dstaddr is not * NULL for p2p interfaces. */ ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; } else { ia->ia_ifa.ifa_dstaddr = NULL; } ia->ia_ifa.ifa_netmask = (struct sockaddr *)&ia->ia_prefixmask; ia->ia_ifp = ifp; if ((oia = in6_ifaddr) != NULL) { for ( ; oia->ia_next; oia = oia->ia_next) continue; oia->ia_next = ia; } else in6_ifaddr = ia; #ifdef __NetBSD__ /* gain a refcnt for the link from in6_ifaddr */ IFAREF(&ia->ia_ifa); #endif #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) if ((ifa = ifp->if_addrlist) != NULL) { for ( ; ifa->ifa_next; ifa = ifa->ifa_next) continue; ifa->ifa_next = ia62ifa(ia); } else ifp->if_addrlist = ia62ifa(ia); #else TAILQ_INSERT_TAIL(&ifp->if_addrlist, &ia->ia_ifa, ifa_list); log_(LOG_ADDR) { diag_printf("%s.%d - After inserting %p into list %p\n", __FUNCTION__, __LINE__, &ia->ia_ifa, &ifp->if_addrlist); _show_ifp(ifp); } #endif #ifdef __NetBSD__ /* gain another refcnt for the link from if_addrlist */ IFAREF(&ia->ia_ifa); #endif #ifdef MEASURE_PERFORMANCE new_ifa = 1; #endif } /* set prefix mask */ if (ifra->ifra_prefixmask.sin6_len) { /* * We prohibit changing the prefix length of an existing * address, because * + such an operation should be rare in IPv6, and * + the operation would confuse prefix management. */ if (ia->ia_prefixmask.sin6_len && in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) { log(LOG_INFO, "in6_update_ifa: the prefix length of an" " existing (%s) address should not be changed\n", ip6_sprintf(&ia->ia_addr.sin6_addr)); error = EINVAL; goto unlink; } ia->ia_prefixmask = ifra->ifra_prefixmask; } /* * If a new destination address is specified, scrub the old one and * install the new destination. Note that the interface must be * p2p or loopback (see the check above.) */ if (dst6.sin6_family == AF_INET6 && !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr, &ia->ia_dstaddr.sin6_addr)) { int e; if ((ia->ia_flags & IFA_ROUTE) != 0 && (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { log(LOG_ERR, "in6_update_ifa: failed to remove " "a route to the old destination: %s\n", ip6_sprintf(&ia->ia_addr.sin6_addr)); /* proceed anyway... */ } else ia->ia_flags &= ~IFA_ROUTE; ia->ia_dstaddr = dst6; } /* * Set lifetimes. We do not refer to ia6t_expire and ia6t_preferred * to see if the address is deprecated or invalidated, but initialize * these members for applications. */ ia->ia6_lifetime = ifra->ifra_lifetime; if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { ia->ia6_lifetime.ia6t_expire = time_second + ia->ia6_lifetime.ia6t_vltime; } else ia->ia6_lifetime.ia6t_expire = 0; if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { ia->ia6_lifetime.ia6t_preferred = time_second + ia->ia6_lifetime.ia6t_pltime; } else ia->ia6_lifetime.ia6t_preferred = 0; /* reset the interface and routing table appropriately. */ if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0) goto unlink; /* * Make the address tentative before joining multicast addresses, * so that corresponding MLD responses would not have a tentative * source address. */ ia->ia6_flags = ifra->ifra_flags; ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /* safety */ #ifdef MIP6 if (hostIsNew && in6if_do_dad(ifp) && mip6_ifa_need_dad(ia)) #else /* MIP6 */ if (hostIsNew && in6if_do_dad(ifp)) #endif /* MIP6 */ ia->ia6_flags |= IN6_IFF_TENTATIVE; /* * Beyond this point, we should call in6_purgeaddr upon an error, * not just go to unlink. */ if ((ifp->if_flags & IFF_MULTICAST) != 0) { struct sockaddr_in6 mltaddr, mltmask; if (hostIsNew) { /* * join solicited multicast addr for new host id */ struct in6_addr llsol; bzero(&llsol, sizeof(struct in6_addr)); llsol.s6_addr16[0] = htons(0xff02); llsol.s6_addr16[1] = htons(ifp->if_index); llsol.s6_addr32[1] = 0; llsol.s6_addr32[2] = htonl(1); llsol.s6_addr32[3] = ifra->ifra_addr.sin6_addr.s6_addr32[3]; llsol.s6_addr8[12] = 0xff; imm = in6_joingroup(ifp, &llsol, &error); if (imm) { LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); } else { log(LOG_ERR, "in6_update_ifa: addmulti failed for " "%s on %s (errno=%d)\n", ip6_sprintf(&llsol), if_name(ifp), error); goto cleanup; } } bzero(&mltmask, sizeof(mltmask)); mltmask.sin6_len = sizeof(struct sockaddr_in6); mltmask.sin6_family = AF_INET6; mltmask.sin6_addr = in6mask32; /* * join link-local all-nodes address */ bzero(&mltaddr, sizeof(mltaddr)); mltaddr.sin6_len = sizeof(struct sockaddr_in6); mltaddr.sin6_family = AF_INET6; mltaddr.sin6_addr = in6addr_linklocal_allnodes; mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); #ifdef __FreeBSD__ rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); #else rt = rtalloc1((struct sockaddr *)&mltaddr, 0); #endif if (rt) { /* 32bit came from "mltmask" */ if (memcmp(&mltaddr.sin6_addr, &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 32 / 8)) { RTFREE(rt); rt = NULL; } } if (!rt) { #if (defined(__bsdi__) && _BSDI_VERSION >= 199802) struct rt_addrinfo info; bzero(&info, sizeof(info)); info.rti_info[RTAX_DST] = (struct sockaddr *)&mltaddr; info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ia->ia_addr; info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&mltmask; info.rti_info[RTAX_IFA] = (struct sockaddr *)&ia->ia_addr; /* XXX: we need RTF_CLONING to fake nd6_rtrequest */ info.rti_flags = RTF_UP | RTF_CLONING; error = rtrequest1(RTM_ADD, &info, NULL); #else error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, (struct sockaddr *)&ia->ia_addr, (struct sockaddr *)&mltmask, RTF_UP | RTF_CLONING, (struct rtentry **)0); #endif if (error) goto cleanup; } else { RTFREE(rt); } imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error); if (imm) { LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); } else { log(LOG_WARNING, "in6_update_ifa: addmulti failed for " "%s on %s (errno=%d)\n", ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); goto cleanup; } /* * join node information group address */ #ifdef __FreeBSD__ #define hostnamelen strlen(hostname) #endif if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr) == 0) { imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error); if (imm) { LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); } else { log(LOG_WARNING, "in6_update_ifa: " "addmulti failed for " "%s on %s (errno=%d)\n", ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); /* XXX not very fatal, go on... */ } } #ifdef __FreeBSD__ #undef hostnamelen #endif /* * join interface-local all-nodes address, on loopback. * (ff01::1%ifN, and ff01::%ifN/32) */ mltaddr.sin6_addr = in6addr_nodelocal_allnodes; mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index); #ifdef __FreeBSD__ rt = rtalloc1((struct sockaddr *)&mltaddr, 0, 0UL); #else rt = rtalloc1((struct sockaddr *)&mltaddr, 0); #endif if (rt) { /* 32bit came from "mltmask" */ if (memcmp(&mltaddr.sin6_addr, &((struct sockaddr_in6 *)rt_key(rt))->sin6_addr, 32 / 8)) { RTFREE(rt); rt = NULL; } } if (!rt) { #if (defined(__bsdi__) && _BSDI_VERSION >= 199802) struct rt_addrinfo info; bzero(&info, sizeof(info)); info.rti_info[RTAX_DST] = (struct sockaddr *)&mltaddr; info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&ia->ia_addr; info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&mltmask; info.rti_info[RTAX_IFA] = (struct sockaddr *)&ia->ia_addr; info.rti_flags = RTF_UP | RTF_CLONING; error = rtrequest1(RTM_ADD, &info, NULL); #else error = rtrequest(RTM_ADD, (struct sockaddr *)&mltaddr, (struct sockaddr *)&ia->ia_addr, (struct sockaddr *)&mltmask, RTF_UP | RTF_CLONING, (struct rtentry **)0); #endif if (error) goto cleanup; } else { RTFREE(rt); } imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error); if (imm) { LIST_INSERT_HEAD(&ia->ia6_memberships, imm, i6mm_chain); } else { log(LOG_WARNING, "in6_update_ifa: " "addmulti failed for %s on %s " "(errno=%d)\n", ip6_sprintf(&mltaddr.sin6_addr), if_name(ifp), error); goto cleanup; } } #ifdef MEASURE_PERFORMANCE { int s = splnet(); if (new_ifa) in6h_addifa(ia); else in6h_rebuild(0); splx(s); } #endif /* * make sure to initialize ND6 information. this is to workaround * issues with interfaces with IPv6 addresses, which have never brought * up. We are assuming that it is safe to nd6_ifattach multiple times. */ nd6_ifattach(ifp); /* * Perform DAD, if needed. * XXX It may be of use, if we can administratively * disable DAD. */ #ifdef MIP6 if (hostIsNew && in6if_do_dad(ifp) && mip6_ifa_need_dad(ia) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) #else /* MIP6 */ if (hostIsNew && in6if_do_dad(ifp) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) #endif /* MIP6 */ { nd6_dad_start((struct ifaddr *)ia, NULL); } return(error); unlink: /* * XXX: if a change of an existing address failed, keep the entry * anyway. */ if (hostIsNew) in6_unlink_ifa(ia, ifp); return(error); cleanup: in6_purgeaddr(&ia->ia_ifa); return error; } void in6_purgeaddr(ifa) struct ifaddr *ifa; { struct ifnet *ifp = ifa->ifa_ifp; struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa; struct in6_multi_mship *imm; /* stop DAD processing */ nd6_dad_stop(ifa); /* * delete route to the destination of the address being purged. * The interface must be p2p or loopback in this case. */ if ((ia->ia_flags & IFA_ROUTE) != 0 && ia->ia_dstaddr.sin6_len != 0) { int e; if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST)) != 0) { log(LOG_ERR, "in6_purgeaddr: failed to remove " "a route to the p2p destination: %s on %s, " "errno=%d\n", ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp), e); /* proceed anyway... */ } else ia->ia_flags &= ~IFA_ROUTE; } /* Remove ownaddr's loopback rtentry, if it exists. */ in6_ifremloop(&(ia->ia_ifa)); /* * leave from multicast groups we have joined for the interface */ while ((imm = ia->ia6_memberships.lh_first) != NULL) { LIST_REMOVE(imm, i6mm_chain); in6_leavegroup(imm); } in6_unlink_ifa(ia, ifp); } int in6_update_ifa(ifp, ifra, ia) struct ifnet *ifp; struct in6_aliasreq *ifra; struct in6_ifaddr *ia; { int res; int s = splnet(); // extern int irq_level; // if (irq_level) { // diag_printf("%s - called from IRQ!\n", __FUNCTION__); // } res = _in6_update_ifa(ifp, ifra, ia); splx(s); return res; } static void in6_unlink_ifa(ia, ifp) struct in6_ifaddr *ia; struct ifnet *ifp; { struct in6_ifaddr *oia; #ifdef __NetBSD__ int s = splsoftnet(); #else int s = splnet(); #endif #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) struct ifaddr *ifa; #endif #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) if ((ifa = ifp->if_addrlist) == ia62ifa(ia)) ifp->if_addrlist = ifa->ifa_next; else { while (ifa->ifa_next && (ifa->ifa_next != ia62ifa(ia))) ifa = ifa->ifa_next; if (ifa->ifa_next) ifa->ifa_next = ia62ifa(ia)->ifa_next; else { /* search failed */ printf("Couldn't unlink in6_ifaddr from ifp\n"); } } #else TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list); log_(LOG_ADDR) { diag_printf("%s.%d - After removing %p into list %p\n", __FUNCTION__, __LINE__, &ia->ia_ifa, &ifp->if_addrlist); _show_ifp(ifp); } #endif #ifdef __NetBSD__ /* release a refcnt for the link from if_addrlist */ IFAFREE(&ia->ia_ifa); #endif oia = ia; if (oia == (ia = in6_ifaddr)) in6_ifaddr = ia->ia_next; else { while (ia->ia_next && (ia->ia_next != oia)) ia = ia->ia_next; if (ia->ia_next) ia->ia_next = oia->ia_next; else { /* search failed */ printf("Couldn't unlink in6_ifaddr from in6_ifaddr\n"); } } #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) if (oia->ia6_multiaddrs.lh_first != NULL) { #ifdef __NetBSD__ /* * XXX thorpej@netbsd.org -- if the interface is going * XXX away, don't save the multicast entries, delete them! */ if (oia->ia_ifa.ifa_ifp->if_output == if_nulloutput) { struct in6_multi *in6m; while ((in6m = LIST_FIRST(&oia->ia6_multiaddrs)) != NULL) in6_delmulti(in6m); } else in6_savemkludge(oia); #else in6_savemkludge(oia); #endif } #endif #ifdef MEASURE_PERFORMANCE in6h_delifa(oia); #endif /* * When an autoconfigured address is being removed, release the * reference to the base prefix. Also, since the release might * affect the status of other (detached) addresses, call * pfxlist_onlink_check(). */ if ((oia->ia6_flags & IN6_IFF_AUTOCONF) != 0) { if (oia->ia6_ndpr == NULL) { log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address " "%p has no prefix\n", oia); } else { oia->ia6_ndpr->ndpr_refcnt--; oia->ia6_flags &= ~IN6_IFF_AUTOCONF; oia->ia6_ndpr = NULL; } pfxlist_onlink_check(); } /* * release another refcnt for the link from in6_ifaddr. * Note that we should decrement the refcnt at least once for all *BSD. */ IFAFREE(&oia->ia_ifa); splx(s); } void in6_purgeif(ifp) struct ifnet *ifp; { struct ifaddr *ifa, *nifa; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = nifa) #else for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; ifa = nifa) #endif { #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) nifa = ifa->ifa_next; #else nifa = TAILQ_NEXT(ifa, ifa_list); #endif if (ifa->ifa_addr->sa_family != AF_INET6) continue; in6_purgeaddr(ifa); } #if !(defined(__bsdi__) && _BSDI_VERSION >= 199802) in6_ifdetach(ifp); #endif } /* * SIOC[GAD]LIFADDR. * SIOCGLIFADDR: get first address. (?) * SIOCGLIFADDR with IFLR_PREFIX: * get first address that matches the specified prefix. * SIOCALIFADDR: add the specified address. * SIOCALIFADDR with IFLR_PREFIX: * add the specified prefix, filling hostid part from * the first link-local address. prefixlen must be <= 64. * SIOCDLIFADDR: delete the specified address. * SIOCDLIFADDR with IFLR_PREFIX: * delete the first address that matches the specified prefix. * return values: * EINVAL on invalid parameters * EADDRNOTAVAIL on prefix match failed/specified address not found * other values may be returned from in6_ioctl() * * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. * this is to accomodate address naming scheme other than RFC2374, * in the future. * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 * address encoding scheme. (see figure on page 8) */ static int #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) in6_lifaddr_ioctl(so, cmd, data, ifp, p) struct socket *so; u_long cmd; caddr_t data; struct ifnet *ifp; struct proc *p; #else in6_lifaddr_ioctl(so, cmd, data, ifp) struct socket *so; u_long cmd; caddr_t data; struct ifnet *ifp; #endif { struct if_laddrreq *iflr = (struct if_laddrreq *)data; struct ifaddr *ifa; struct sockaddr *sa; int64_t zoneid; /* sanity checks */ if (!data || !ifp) { panic("invalid argument to in6_lifaddr_ioctl"); /* NOTREACHED */ } switch (cmd) { case SIOCGLIFADDR: /* address must be specified on GET with IFLR_PREFIX */ if ((iflr->flags & IFLR_PREFIX) == 0) break; /* FALLTHROUGH */ case SIOCALIFADDR: case SIOCDLIFADDR: /* address must be specified on ADD and DELETE */ sa = (struct sockaddr *)&iflr->addr; if (sa->sa_family != AF_INET6) return EINVAL; if (sa->sa_len != sizeof(struct sockaddr_in6)) return EINVAL; /* XXX need improvement */ sa = (struct sockaddr *)&iflr->dstaddr; if (sa->sa_family && sa->sa_family != AF_INET6) return EINVAL; if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6)) return EINVAL; break; default: /* shouldn't happen */ #if 0 panic("invalid cmd to in6_lifaddr_ioctl"); /* NOTREACHED */ #else return EOPNOTSUPP; #endif } if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) return EINVAL; switch (cmd) { case SIOCALIFADDR: { struct in6_aliasreq ifra; struct in6_addr *hostid = NULL; int prefixlen; if ((iflr->flags & IFLR_PREFIX) != 0) { struct sockaddr_in6 *sin6; /* * hostid is to fill in the hostid part of the * address. hostid points to the first link-local * address attached to the interface. */ ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0); if (!ifa) return EADDRNOTAVAIL; hostid = IFA_IN6(ifa); /* prefixlen must be <= 64. */ if (64 < iflr->prefixlen) return EINVAL; prefixlen = iflr->prefixlen; /* hostid part must be zero. */ sin6 = (struct sockaddr_in6 *)&iflr->addr; if (sin6->sin6_addr.s6_addr32[2] != 0 || sin6->sin6_addr.s6_addr32[3] != 0) { return EINVAL; } } else prefixlen = iflr->prefixlen; /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ bzero(&ifra, sizeof(ifra)); bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); bcopy(&iflr->addr, &ifra.ifra_addr, ((struct sockaddr *)&iflr->addr)->sa_len); if (hostid) { /* fill in hostid part */ ifra.ifra_addr.sin6_addr.s6_addr32[2] = hostid->s6_addr32[2]; ifra.ifra_addr.sin6_addr.s6_addr32[3] = hostid->s6_addr32[3]; } if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /* XXX */ bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, ((struct sockaddr *)&iflr->dstaddr)->sa_len); if (hostid) { ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = hostid->s6_addr32[2]; ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = hostid->s6_addr32[3]; } } ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); in6_prefixlen2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p); #else return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp); #endif } case SIOCGLIFADDR: case SIOCDLIFADDR: { struct in6_ifaddr *ia; struct in6_addr mask, candidate, match; struct sockaddr_in6 *sin6; int cmp; bzero(&mask, sizeof(mask)); if (iflr->flags & IFLR_PREFIX) { /* lookup a prefix rather than address. */ in6_prefixlen2mask(&mask, iflr->prefixlen); sin6 = (struct sockaddr_in6 *)&iflr->addr; bcopy(&sin6->sin6_addr, &match, sizeof(match)); match.s6_addr32[0] &= mask.s6_addr32[0]; match.s6_addr32[1] &= mask.s6_addr32[1]; match.s6_addr32[2] &= mask.s6_addr32[2]; match.s6_addr32[3] &= mask.s6_addr32[3]; /* if you set extra bits, that's wrong */ if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) return EINVAL; cmp = 1; } else { if (cmd == SIOCGLIFADDR) { /* on getting an address, take the 1st match */ cmp = 0; /* XXX */ } else { /* on deleting an address, do exact match */ in6_prefixlen2mask(&mask, 128); sin6 = (struct sockaddr_in6 *)&iflr->addr; bcopy(&sin6->sin6_addr, &match, sizeof(match)); cmp = 1; } } #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr->sa_family != AF_INET6) continue; if (!cmp) break; bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); #ifndef SCOPEDROUTING /* * XXX: this is adhoc, but is necessary to allow * a user to specify fe80::/64 (not /10) for a * link-local address. */ if (IN6_IS_ADDR_LINKLOCAL(&candidate)) candidate.s6_addr16[1] = 0; #endif candidate.s6_addr32[0] &= mask.s6_addr32[0]; candidate.s6_addr32[1] &= mask.s6_addr32[1]; candidate.s6_addr32[2] &= mask.s6_addr32[2]; candidate.s6_addr32[3] &= mask.s6_addr32[3]; if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) break; } if (!ifa) return EADDRNOTAVAIL; ia = ifa2ia6(ifa); if (cmd == SIOCGLIFADDR) { #ifndef SCOPEDROUTING struct sockaddr_in6 *s6; #endif /* fill in the if_laddrreq structure */ bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); #ifndef SCOPEDROUTING /* XXX see above */ s6 = (struct sockaddr_in6 *)&iflr->addr; if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { s6->sin6_addr.s6_addr16[1] = 0; zoneid = in6_addr2zoneid(ifp, &s6->sin6_addr); if (zoneid < 0) /* XXX: should not happen */ return(EINVAL); s6->sin6_scope_id = zoneid; } #endif if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { bcopy(&ia->ia_dstaddr, &iflr->dstaddr, ia->ia_dstaddr.sin6_len); #ifndef SCOPEDROUTING /* XXX see above */ s6 = (struct sockaddr_in6 *)&iflr->dstaddr; if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) { s6->sin6_addr.s6_addr16[1] = 0; zoneid = in6_addr2zoneid(ifp, &s6->sin6_addr); if (zoneid < 0) /* XXX */ return(EINVAL); s6->sin6_scope_id = zoneid; } #endif } else bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); iflr->prefixlen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); iflr->flags = ia->ia6_flags; /* XXX */ return 0; } else { struct in6_aliasreq ifra; /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ bzero(&ifra, sizeof(ifra)); bcopy(iflr->iflr_name, ifra.ifra_name, sizeof(ifra.ifra_name)); bcopy(&ia->ia_addr, &ifra.ifra_addr, ia->ia_addr.sin6_len); if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, ia->ia_dstaddr.sin6_len); } else { bzero(&ifra.ifra_dstaddr, sizeof(ifra.ifra_dstaddr)); } bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, ia->ia_prefixmask.sin6_len); ifra.ifra_flags = ia->ia6_flags; #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, ifp, p); #else return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, ifp); #endif } } } return EOPNOTSUPP; /* just for safety */ } /* * Initialize an interface's intetnet6 address * and routing table entry. */ static int in6_ifinit(ifp, ia, sin6, newhost) struct ifnet *ifp; struct in6_ifaddr *ia; struct sockaddr_in6 *sin6; int newhost; { int error = 0, plen, ifacount = 0; int s = splimp(); struct ifaddr *ifa; /* * Give the interface a chance to initialize * if this is its first address, * and to validate the address if necessary. */ #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr == NULL) continue; /* just for safety */ if (ifa->ifa_addr->sa_family != AF_INET6) continue; ifacount++; } ia->ia_addr = *sin6; if (ifacount <= 1 && ifp->if_ioctl && (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) { splx(s); return(error); } splx(s); ia->ia_ifa.ifa_metric = ifp->if_metric; /* we could do in(6)_socktrim here, but just omit it at this moment. */ /* * Special case: * If the destination address is specified for a point-to-point * interface, install a route to the destination as an interface * direct route. */ plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */ if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) { if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_UP | RTF_HOST)) != 0) return(error); ia->ia_flags |= IFA_ROUTE; } if (plen < 128) { /* * The RTF_CLONING flag is necessary for in6_is_ifloop_auto(). */ ia->ia_ifa.ifa_flags |= RTF_CLONING; } /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */ if (newhost) { /* set the rtrequest function to create llinfo */ ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; in6_ifaddloop(&(ia->ia_ifa)); } #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) if (ifp->if_flags & IFF_MULTICAST) in6_restoremkludge(ia, ifp); #endif return(error); } #if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) /* * Multicast address kludge: * If there were any multicast addresses attached to this interface address, * either move them to another address on this interface, or save them until * such time as this interface is reconfigured for IPv6. */ void in6_savemkludge(oia) struct in6_ifaddr *oia; { struct in6_ifaddr *ia; struct in6_multi *in6m, *next; IFP_TO_IA6(oia->ia_ifp, ia); if (ia) { /* there is another address */ for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){ next = in6m->in6m_entry.le_next; IFAFREE(&in6m->in6m_ia->ia_ifa); IFAREF(&ia->ia_ifa); in6m->in6m_ia = ia; LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry); } } else { /* last address on this if deleted, save */ struct multi6_kludge *mk; for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) { if (mk->mk_ifp == oia->ia_ifp) break; } if (mk == NULL) /* this should not happen! */ panic("in6_savemkludge: no kludge space"); for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){ next = in6m->in6m_entry.le_next; IFAFREE(&in6m->in6m_ia->ia_ifa); /* release reference */ in6m->in6m_ia = NULL; LIST_INSERT_HEAD(&mk->mk_head, in6m, in6m_entry); } } } /* * Continuation of multicast address hack: * If there was a multicast group list previously saved for this interface, * then we re-attach it to the first address configured on the i/f. */ void in6_restoremkludge(ia, ifp) struct in6_ifaddr *ia; struct ifnet *ifp; { struct multi6_kludge *mk; for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) { if (mk->mk_ifp == ifp) { struct in6_multi *in6m, *next; for (in6m = mk->mk_head.lh_first; in6m; in6m = next) { next = in6m->in6m_entry.le_next; in6m->in6m_ia = ia; IFAREF(&ia->ia_ifa); LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry); } LIST_INIT(&mk->mk_head); break; } } } /* * Allocate space for the kludge at interface initialization time. * Formerly, we dynamically allocated the space in in6_savemkludge() with * malloc(M_WAITOK). However, it was wrong since the function could be called * under an interrupt context (software timer on address lifetime expiration). * Also, we cannot just give up allocating the strucutre, since the group * membership structure is very complex and we need to keep it anyway. * Of course, this function MUST NOT be called under an interrupt context. * Specifically, it is expected to be called only from in6_ifattach(), though * it is a global function. */ void in6_createmkludge(ifp) struct ifnet *ifp; { struct multi6_kludge *mk; for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) { /* If we've already had one, do not allocate. */ if (mk->mk_ifp == ifp) return; } mk = malloc(sizeof(*mk), M_IPMADDR, M_WAITOK); bzero(mk, sizeof(*mk)); LIST_INIT(&mk->mk_head); mk->mk_ifp = ifp; LIST_INSERT_HEAD(&in6_mk, mk, mk_entry); } void in6_purgemkludge(ifp) struct ifnet *ifp; { struct multi6_kludge *mk; struct in6_multi *in6m; for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) { if (mk->mk_ifp != ifp) continue; /* leave from all multicast groups joined */ while ((in6m = LIST_FIRST(&mk->mk_head)) != NULL) in6_delmulti(in6m); LIST_REMOVE(mk, mk_entry); free(mk, M_IPMADDR); break; } } /* * Add an address to the list of IP6 multicast addresses for a * given interface. */ struct in6_multi * in6_addmulti(maddr6, ifp, errorp) struct in6_addr *maddr6; struct ifnet *ifp; int *errorp; { struct in6_ifaddr *ia; struct in6_ifreq ifr; struct in6_multi *in6m; #ifdef __NetBSD__ int s = splsoftnet(); #else int s = splnet(); #endif *errorp = 0; /* * See if address already in list. */ IN6_LOOKUP_MULTI(*maddr6, ifp, in6m); if (in6m != NULL) { /* * Found it; just increment the refrence count. */ in6m->in6m_refcount++; } else { /* * New address; allocate a new multicast record * and link it into the interface's multicast list. */ in6m = (struct in6_multi *) malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT); if (in6m == NULL) { splx(s); *errorp = ENOBUFS; return(NULL); } in6m->in6m_addr = *maddr6; in6m->in6m_ifp = ifp; in6m->in6m_refcount = 1; IFP_TO_IA6(ifp, ia); if (ia == NULL) { free(in6m, M_IPMADDR); splx(s); *errorp = EADDRNOTAVAIL; /* appropriate? */ return(NULL); } in6m->in6m_ia = ia; IFAREF(&ia->ia_ifa); /* gain a reference */ LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry); /* * Ask the network driver to update its multicast reception * filter appropriately for the new address. */ bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6)); ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6); ifr.ifr_addr.sin6_family = AF_INET6; ifr.ifr_addr.sin6_addr = *maddr6; if (ifp->if_ioctl == NULL) *errorp = ENXIO; /* XXX: appropriate? */ else *errorp = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); if (*errorp) { LIST_REMOVE(in6m, in6m_entry); free(in6m, M_IPMADDR); IFAFREE(&ia->ia_ifa); splx(s); return(NULL); } /* * Let MLD6 know that we have joined a new IP6 multicast * group. */ mld6_start_listening(in6m); } splx(s); return(in6m); } /* * Delete a multicast address record. */ void in6_delmulti(in6m) struct in6_multi *in6m; { struct in6_ifreq ifr; #ifdef __NetBSD__ int s = splsoftnet(); #else int s = splnet(); #endif if (--in6m->in6m_refcount == 0) { /* * No remaining claims to this record; let MLD6 know * that we are leaving the multicast group. */ mld6_stop_listening(in6m); /* * Unlink from list. */ LIST_REMOVE(in6m, in6m_entry); if (in6m->in6m_ia) { IFAFREE(&in6m->in6m_ia->ia_ifa); /* release reference */ } /* * Notify the network driver to update its multicast * reception filter. */ bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6)); ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6); ifr.ifr_addr.sin6_family = AF_INET6; ifr.ifr_addr.sin6_addr = in6m->in6m_addr; (*in6m->in6m_ifp->if_ioctl)(in6m->in6m_ifp, SIOCDELMULTI, (caddr_t)&ifr); free(in6m, M_IPMADDR); } splx(s); } #else /* not FreeBSD3 */ /* * Add an address to the list of IP6 multicast addresses for a * given interface. */ struct in6_multi * in6_addmulti(maddr6, ifp, errorp) struct in6_addr *maddr6; struct ifnet *ifp; int *errorp; { struct in6_multi *in6m; struct sockaddr_in6 sin6; struct ifmultiaddr *ifma; int s = splnet(); *errorp = 0; /* * Call generic routine to add membership or increment * refcount. It wants addresses in the form of a sockaddr, * so we build one here (being careful to zero the unused bytes). */ bzero(&sin6, sizeof sin6); sin6.sin6_family = AF_INET6; sin6.sin6_len = sizeof sin6; sin6.sin6_addr = *maddr6; *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma); if (*errorp) { splx(s); return 0; } /* * If ifma->ifma_protospec is null, then if_addmulti() created * a new record. Otherwise, we are done. */ if (ifma->ifma_protospec != 0) return ifma->ifma_protospec; /* XXX - if_addmulti uses M_WAITOK. Can this really be called at interrupt time? If so, need to fix if_addmulti. XXX */ in6m = (struct in6_multi *)malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT); if (in6m == NULL) { splx(s); return (NULL); } bzero(in6m, sizeof *in6m); in6m->in6m_addr = *maddr6; in6m->in6m_ifp = ifp; in6m->in6m_ifma = ifma; ifma->ifma_protospec = in6m; LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry); /* * Let MLD6 know that we have joined a new IP6 multicast * group. */ mld6_start_listening(in6m); splx(s); return(in6m); } /* * Delete a multicast address record. */ void in6_delmulti(in6m) struct in6_multi *in6m; { struct ifmultiaddr *ifma = in6m->in6m_ifma; int s = splnet(); if (ifma->ifma_refcount == 1) { /* * No remaining claims to this record; let MLD6 know * that we are leaving the multicast group. */ mld6_stop_listening(in6m); ifma->ifma_protospec = 0; LIST_REMOVE(in6m, in6m_entry); free(in6m, M_IPMADDR); } /* XXX - should be separate API for when we have an ifma? */ if_delmulti(ifma->ifma_ifp, ifma->ifma_addr); splx(s); } #endif /* not FreeBSD3 */ struct in6_multi_mship * in6_joingroup(ifp, addr, errorp) struct ifnet *ifp; struct in6_addr *addr; int *errorp; { struct in6_multi_mship *imm; imm = malloc(sizeof(*imm), M_IPMADDR, M_NOWAIT); if (!imm) { *errorp = ENOBUFS; return NULL; } imm->i6mm_maddr = in6_addmulti(addr, ifp, errorp); if (!imm->i6mm_maddr) { /* *errorp is alrady set */ free(imm, M_IPMADDR); return NULL; } return imm; } int in6_leavegroup(imm) struct in6_multi_mship *imm; { if (imm->i6mm_maddr) in6_delmulti(imm->i6mm_maddr); free(imm, M_IPMADDR); return 0; } /* * Find an IPv6 interface link-local address specific to an interface. */ struct in6_ifaddr * in6ifa_ifpforlinklocal(ifp, ignoreflags) struct ifnet *ifp; int ignoreflags; { struct ifaddr *ifa; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr == NULL) continue; /* just for safety */ if (ifa->ifa_addr->sa_family != AF_INET6) continue; if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) { if ((((struct in6_ifaddr *)ifa)->ia6_flags & ignoreflags) != 0) continue; break; } } return((struct in6_ifaddr *)ifa); } /* * find the internet address corresponding to a given interface and address. */ static struct in6_ifaddr * _in6ifa_ifpwithaddr(struct ifnet *ifp, struct in6_addr *addr) { struct ifaddr *ifa; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr == NULL) continue; /* just for safety */ if (ifa->ifa_addr->sa_family != AF_INET6) continue; if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) break; } return((struct in6_ifaddr *)ifa); } struct in6_ifaddr * in6ifa_ifpwithaddr(ifp, addr) struct ifnet *ifp; struct in6_addr *addr; { struct in6_ifaddr *_ifa = _in6ifa_ifpwithaddr(ifp, addr); #if 0 if (!_ifa) { struct ifaddr *ifa; diag_printf("%s\n", __FUNCTION__); diag_dump_buf(addr, 16); diag_printf("==============================================================\n"); TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) { if (ifa->ifa_addr == NULL) continue; /* just for safety */ if (ifa->ifa_addr->sa_family != AF_INET6) continue; diag_dump_buf(IFA_IN6(ifa), 16); diag_printf("--------------------------------------------------------------\n"); } } #endif return(_ifa); } /* * Convert IP6 address to printable (loggable) representation. */ static char digits[] = "0123456789abcdef"; static int ip6round = 0; char * ip6_sprintf(addr) const struct in6_addr *addr; { static char ip6buf[8][48]; int i; char *cp; const u_short *a = (const u_short *)addr; const u_char *d; int dcolon = 0; ip6round = (ip6round + 1) & 7; cp = ip6buf[ip6round]; for (i = 0; i < 8; i++) { if (dcolon == 1) { if (*a == 0) { if (i == 7) *cp++ = ':'; a++; continue; } else dcolon = 2; } if (*a == 0) { if (dcolon == 0 && *(a + 1) == 0) { if (i == 0) *cp++ = ':'; *cp++ = ':'; dcolon = 1; } else { *cp++ = '0'; *cp++ = ':'; } a++; continue; } d = (const u_char *)a; *cp++ = digits[*d >> 4]; *cp++ = digits[*d++ & 0xf]; *cp++ = digits[*d >> 4]; *cp++ = digits[*d & 0xf]; *cp++ = ':'; a++; } *--cp = 0; return(ip6buf[ip6round]); } int in6_localaddr(in6) struct in6_addr *in6; { struct in6_ifaddr *ia; if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) return 1; for (ia = in6_ifaddr; ia; ia = ia->ia_next) if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, &ia->ia_prefixmask.sin6_addr)) return 1; return (0); } int in6_is_addr_deprecated(sa6) struct sockaddr_in6 *sa6; { struct in6_ifaddr *ia; for (ia = in6_ifaddr; ia; ia = ia->ia_next) { if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr, &sa6->sin6_addr) && #ifdef SCOPEDROUTING ia->ia_addr.sin6_scope_id == sa6->sin6_scope_id && #endif (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) return(1); /* true */ /* XXX: do we still have to go thru the rest of the list? */ } return(0); /* false */ } /* * return length of part which dst and src are equal * hard coding... */ int in6_matchlen(src, dst) struct in6_addr *src, *dst; { int match = 0; u_char *s = (u_char *)src, *d = (u_char *)dst; u_char *lim = s + 16, r; while (s < lim) if ((r = (*d++ ^ *s++)) != 0) { while (r < 128) { match++; r <<= 1; } break; } else match += 8; return match; } /* XXX: to be scope conscious */ int in6_are_prefix_equal(p1, p2, len) struct in6_addr *p1, *p2; int len; { int bytelen, bitlen; /* sanity check */ if (0 > len || len > 128) { log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", len); return(0); } bytelen = len / 8; bitlen = len % 8; if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) return(0); if (p1->s6_addr[bytelen] >> (8 - bitlen) != p2->s6_addr[bytelen] >> (8 - bitlen)) return(0); return(1); } void in6_prefixlen2mask(maskp, len) struct in6_addr *maskp; int len; { u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; int bytelen, bitlen, i; /* sanity check */ if (0 > len || len > 128) { log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", len); return; } bzero(maskp, sizeof(*maskp)); bytelen = len / 8; bitlen = len % 8; for (i = 0; i < bytelen; i++) maskp->s6_addr[i] = 0xff; if (bitlen) maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; } /* * return the best address out of the same scope. if no address was * found, return the first valid address from designated IF. */ struct in6_ifaddr * in6_ifawithifp(ifp, dst) struct ifnet *ifp; struct in6_addr *dst; { int dst_scope = in6_addrscope(dst), blen = -1, tlen; struct ifaddr *ifa; struct in6_ifaddr *besta = 0; struct in6_ifaddr *dep[2]; /* last-resort: deprecated */ dep[0] = dep[1] = NULL; /* * We first look for addresses in the same scope. * If there is one, return it. * If two or more, return one which matches the dst longest. * If none, return one of global addresses assigned other ifs. */ #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr->sa_family != AF_INET6) continue; if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) continue; /* XXX: is there any case to allow anycast? */ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) continue; /* don't use this interface */ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) continue; if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { if (ip6_use_deprecated) dep[0] = (struct in6_ifaddr *)ifa; continue; } if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { /* * call in6_matchlen() as few as possible */ if (besta) { if (blen == -1) blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); tlen = in6_matchlen(IFA_IN6(ifa), dst); if (tlen > blen) { blen = tlen; besta = (struct in6_ifaddr *)ifa; } } else besta = (struct in6_ifaddr *)ifa; } } if (besta) return(besta); #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr->sa_family != AF_INET6) continue; if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) continue; /* XXX: is there any case to allow anycast? */ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) continue; /* don't use this interface */ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) continue; if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { if (ip6_use_deprecated) dep[1] = (struct in6_ifaddr *)ifa; continue; } return (struct in6_ifaddr *)ifa; } /* use the last-resort values, that are, deprecated addresses */ if (dep[0]) return dep[0]; if (dep[1]) return dep[1]; return NULL; } /* * perform DAD when interface becomes IFF_UP. */ void in6_if_up(ifp) struct ifnet *ifp; { struct ifaddr *ifa; struct in6_ifaddr *ia; int dad_delay; /* delay ticks before DAD output */ /* * special cases, like 6to4, are handled in in6_ifattach */ in6_ifattach(ifp, NULL); dad_delay = 0; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) #elif defined(__FreeBSD__) && __FreeBSD__ >= 4 TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list) #else for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) #endif { if (ifa->ifa_addr->sa_family != AF_INET6) continue; ia = (struct in6_ifaddr *)ifa; if (ia->ia6_flags & IN6_IFF_TENTATIVE) nd6_dad_start(ifa, &dad_delay); } } int in6if_do_dad(ifp) struct ifnet *ifp; { if ((ifp->if_flags & IFF_LOOPBACK) != 0) return(0); switch (ifp->if_type) { #ifdef IFT_DUMMY case IFT_DUMMY: #endif case IFT_FAITH: /* * These interfaces do not have the IFF_LOOPBACK flag, * but loop packets back. We do not have to do DAD on such * interfaces. We should even omit it, because loop-backed * NS would confuse the DAD procedure. */ return(0); default: /* * Our DAD routine requires the interface up and running. * However, some interfaces can be up before the RUNNING * status. Additionaly, users may try to assign addresses * before the interface becomes up (or running). * We simply skip DAD in such a case as a work around. * XXX: we should rather mark "tentative" on such addresses, * and do DAD after the interface becomes ready. */ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) return(0); return(1); } } /* * Calculate max IPv6 MTU through all the interfaces and store it * to in6_maxmtu. */ void in6_setmaxmtu() { unsigned long maxmtu = 0; struct ifnet *ifp; #if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3) for (ifp = ifnet; ifp; ifp = ifp->if_next) #else for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) #endif { if ((ifp->if_flags & IFF_LOOPBACK) == 0 && nd_ifinfo[ifp->if_index].linkmtu > maxmtu) maxmtu = nd_ifinfo[ifp->if_index].linkmtu; } if (maxmtu) /* update only when maxmtu is positive */ in6_maxmtu = maxmtu; } #if defined(__FreeBSD__) && __FreeBSD__ >= 3 /* * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be * v4 mapped addr or v4 compat addr */ void in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { bzero(sin, sizeof(*sin)); sin->sin_len = sizeof(struct sockaddr_in); sin->sin_family = AF_INET; sin->sin_port = sin6->sin6_port; sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; } /* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ void in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) { bzero(sin6, sizeof(*sin6)); sin6->sin6_len = sizeof(struct sockaddr_in6); sin6->sin6_family = AF_INET6; sin6->sin6_port = sin->sin_port; sin6->sin6_addr.s6_addr32[0] = 0; sin6->sin6_addr.s6_addr32[1] = 0; sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; } /* Convert sockaddr_in6 into sockaddr_in. */ void in6_sin6_2_sin_in_sock(struct sockaddr *nam) { struct sockaddr_in *sin_p; struct sockaddr_in6 sin6; /* * Save original sockaddr_in6 addr and convert it * to sockaddr_in. */ sin6 = *(struct sockaddr_in6 *)nam; sin_p = (struct sockaddr_in *)nam; in6_sin6_2_sin(sin_p, &sin6); } /* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ void in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) { struct sockaddr_in *sin_p; struct sockaddr_in6 *sin6_p; MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, M_WAITOK); sin_p = (struct sockaddr_in *)*nam; in6_sin_2_v4mapsin6(sin_p, sin6_p); FREE(*nam, M_SONAME); *nam = (struct sockaddr *)sin6_p; } #endif /* freebsd3 */ #ifdef MEASURE_PERFORMANCE #define IN6_MAXADDRHASH 1000 #ifndef IN6_ADDRHASH #ifndef INET6_SERVER #define IN6_ADDRHASH 23 #else #define IN6_ADDRHASH 997 #endif #endif static struct in6hash in6h_hash_any = { NULL, IN6ADDR_ANY_INIT, NULL, 0 }; struct in6hash *in6hash[IN6_MAXADDRHASH];/* hash buckets for local IPv6 addrs */ int in6_nhash = IN6_ADDRHASH; /* number of hash buckets for addrs */ int in6_hash_nullhit; #define HASH6(in6) ((in6)->s6_addr32[0]^(in6)->s6_addr32[1]^\ (in6)->s6_addr32[2]^(in6)->s6_addr32[3]) /* * Initialize the hash by adding entries for IN6ADDR_ANY */ struct in6hash *ih_cache = NULL; void in6h_hashinit() { in6h_addhash(&in6h_hash_any); } void in6h_addifa(ia) struct in6_ifaddr *ia; { if (ia->ia6_hash.in6h_ifa == NULL) ia->ia6_hash.in6h_ifa = ia; ia->ia6_hash.in6h_addr = IA6_SIN6(ia)->sin6_addr; /* scope? */ if (IN6_IS_ADDR_UNSPECIFIED(&ia->ia6_hash.in6h_addr)) return; in6h_addhash(&ia->ia6_hash); } /* * Rebuild the hash when any interface addresses have been changed. * Since this should happen infrequently we remove all the interfaces * from the hash and add them all back. This insures that the order * of addresses in the hash is consistent. */ void in6h_rebuild(newhashsiz) int newhashsiz; /* can be 0, meaning unchange the size */ { struct in6_ifaddr *ia; if (newhashsiz > IN6_MAXADDRHASH) return; /* XXX invalid */ for (ia = in6_ifaddr; ia != NULL; ia = ia->ia_next) in6h_delifa(ia); if (newhashsiz) in6_nhash = newhashsiz; for (ia = in6_ifaddr; ia != NULL; ia = ia->ia_next) in6h_addifa(ia); } /* Remove hash entries for local address on an in6_ifaddr. */ void in6h_delifa(ia) struct in6_ifaddr *ia; { if (IN6_IS_ADDR_UNSPECIFIED(&ia->ia6_hash.in6h_addr)) return; in6h_delhash(&ia->ia6_hash); ia->ia6_hash.in6h_addr = in6addr_any; } static void in6h_addhash(ih) struct in6hash *ih; { struct in6hash **prev; /* Add to tail of hash list, as address is at end of address list */ for (prev = &in6hash[HASH6(&ih->in6h_addr) % in6_nhash]; *prev; prev = &((*prev)->in6h_next)) { /* however, we always prefer non-global addresses */ if (IN6_IS_ADDR_LINKLOCAL(&(*prev)->in6h_addr)) break; } ih->in6h_next = *prev; *prev = ih; } static void in6h_delhash(ih) struct in6hash *ih; { struct in6hash **prev; ih_cache = NULL; for (prev = &in6hash[HASH6(&ih->in6h_addr) % in6_nhash]; *prev != ih; prev = &((*prev)->in6h_next)) { #ifdef DEBUG if (*prev == NULL) panic("in6h_delhash: lost entry"); #endif } *prev = (*prev)->in6h_next; } /* * Look up hash structure for specified IP address * and (optional) interface; matches any interface * if ifp is null, or this address is not associated * with the specified interface. */ struct in6hash * in6h_lookup(addr, ifp) const struct in6_addr *addr; struct ifnet *ifp; { struct in6hash *ih, *maybe_ih = NULL; /* just for measurement */ if ((ih = in6hash[HASH6(addr) % in6_nhash]) == NULL) in6_hash_nullhit++; for (; ih; ih = ih->in6h_next) { if (IN6_ARE_ADDR_EQUAL(&ih->in6h_addr, addr)) { ih->in6h_hit++; if (ih->in6h_ifa == NULL || ih->in6h_ifa->ia_ifp == ifp || ifp == NULL) { ih_cache = ih; return (ih); } if (maybe_ih == NULL) maybe_ih = ih; } else ih->in6h_miss++; } if (maybe_ih) ih_cache = maybe_ih; return (maybe_ih); } #endif /* MEASURE_PERFORMANCE */
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