Index: projects/routing/sys/net/if_stf.c =================================================================== --- projects/routing/sys/net/if_stf.c (revision 274331) +++ projects/routing/sys/net/if_stf.c (revision 274332) @@ -1,774 +1,773 @@ /* $FreeBSD$ */ /* $KAME: if_stf.c,v 1.73 2001/12/03 11:08:30 keiichi Exp $ */ /*- * Copyright (C) 2000 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. */ /* * 6to4 interface, based on RFC3056. * * 6to4 interface is NOT capable of link-layer (I mean, IPv4) multicasting. * There is no address mapping defined from IPv6 multicast address to IPv4 * address. Therefore, we do not have IFF_MULTICAST on the interface. * * Due to the lack of address mapping for link-local addresses, we cannot * throw packets toward link-local addresses (fe80::x). Also, we cannot throw * packets to link-local multicast addresses (ff02::x). * * Here are interesting symptoms due to the lack of link-local address: * * Unicast routing exchange: * - RIPng: Impossible. Uses link-local multicast packet toward ff02::9, * and link-local addresses as nexthop. * - OSPFv6: Impossible. OSPFv6 assumes that there's link-local address * assigned to the link, and makes use of them. Also, HELLO packets use * link-local multicast addresses (ff02::5 and ff02::6). * - BGP4+: Maybe. You can only use global address as nexthop, and global * address as TCP endpoint address. * * Multicast routing protocols: * - PIM: Hello packet cannot be used to discover adjacent PIM routers. * Adjacent PIM routers must be configured manually (is it really spec-wise * correct thing to do?). * * ICMPv6: * - Redirects cannot be used due to the lack of link-local address. * * stf interface does not have, and will not need, a link-local address. * It seems to have no real benefit and does not help the above symptoms much. * Even if we assign link-locals to interface, we cannot really * use link-local unicast/multicast on top of 6to4 cloud (since there's no * encapsulation defined for link-local address), and the above analysis does * not change. RFC3056 does not mandate the assignment of link-local address * either. * * 6to4 interface has security issues. Refer to * http://playground.iijlab.net/i-d/draft-itojun-ipv6-transition-abuse-00.txt * for details. The code tries to filter out some of malicious packets. * Note that there is no way to be 100% secure. */ #include "opt_inet.h" #include "opt_inet6.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include -#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include SYSCTL_DECL(_net_link); static SYSCTL_NODE(_net_link, IFT_STF, stf, CTLFLAG_RW, 0, "6to4 Interface"); static int stf_permit_rfc1918 = 0; SYSCTL_INT(_net_link_stf, OID_AUTO, permit_rfc1918, CTLFLAG_RWTUN, &stf_permit_rfc1918, 0, "Permit the use of private IPv4 addresses"); #define STFUNIT 0 #define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002) /* * XXX: Return a pointer with 16-bit aligned. Don't cast it to * struct in_addr *; use bcopy() instead. */ #define GET_V4(x) (&(x)->s6_addr16[1]) struct stf_softc { struct ifnet *sc_ifp; struct mtx sc_ro_mtx; u_int sc_fibnum; const struct encaptab *encap_cookie; }; #define STF2IFP(sc) ((sc)->sc_ifp) static const char stfname[] = "stf"; /* * Note that mutable fields in the softc are not currently locked. * We do lock sc_ro in stf_output though. */ static MALLOC_DEFINE(M_STF, stfname, "6to4 Tunnel Interface"); static const int ip_stf_ttl = 40; extern struct domain inetdomain; struct protosw in_stf_protosw = { .pr_type = SOCK_RAW, .pr_domain = &inetdomain, .pr_protocol = IPPROTO_IPV6, .pr_flags = PR_ATOMIC|PR_ADDR, .pr_input = in_stf_input, .pr_output = rip_output, .pr_ctloutput = rip_ctloutput, .pr_usrreqs = &rip_usrreqs }; static char *stfnames[] = {"stf0", "stf", "6to4", NULL}; static int stfmodevent(module_t, int, void *); static int stf_encapcheck(const struct mbuf *, int, int, void *); static int stf_getsrcifa6(struct ifnet *, struct in6_addr *, struct in6_addr *); static int stf_output(struct ifnet *, struct mbuf *, const struct sockaddr *, struct nhop_info *); static int isrfc1918addr(struct in_addr *); static int stf_checkaddr4(struct stf_softc *, struct in_addr *, struct ifnet *); static int stf_checkaddr6(struct stf_softc *, struct in6_addr *, struct ifnet *); static int stf_ioctl(struct ifnet *, u_long, caddr_t); static int stf_clone_match(struct if_clone *, const char *); static int stf_clone_create(struct if_clone *, char *, size_t, caddr_t); static int stf_clone_destroy(struct if_clone *, struct ifnet *); static struct if_clone *stf_cloner; static int stf_clone_match(struct if_clone *ifc, const char *name) { int i; for(i = 0; stfnames[i] != NULL; i++) { if (strcmp(stfnames[i], name) == 0) return (1); } return (0); } static int stf_clone_create(struct if_clone *ifc, char *name, size_t len, caddr_t params) { int err, unit; struct stf_softc *sc; struct ifnet *ifp; /* * We can only have one unit, but since unit allocation is * already locked, we use it to keep from allocating extra * interfaces. */ unit = STFUNIT; err = ifc_alloc_unit(ifc, &unit); if (err != 0) return (err); sc = malloc(sizeof(struct stf_softc), M_STF, M_WAITOK | M_ZERO); ifp = STF2IFP(sc) = if_alloc(IFT_STF); if (ifp == NULL) { free(sc, M_STF); ifc_free_unit(ifc, unit); return (ENOSPC); } ifp->if_softc = sc; sc->sc_fibnum = curthread->td_proc->p_fibnum; /* * Set the name manually rather then using if_initname because * we don't conform to the default naming convention for interfaces. */ strlcpy(ifp->if_xname, name, IFNAMSIZ); ifp->if_dname = stfname; ifp->if_dunit = IF_DUNIT_NONE; mtx_init(&(sc)->sc_ro_mtx, "stf ro", NULL, MTX_DEF); sc->encap_cookie = encap_attach_func(AF_INET, IPPROTO_IPV6, stf_encapcheck, &in_stf_protosw, sc); if (sc->encap_cookie == NULL) { if_printf(ifp, "attach failed\n"); free(sc, M_STF); ifc_free_unit(ifc, unit); return (ENOMEM); } ifp->if_mtu = IPV6_MMTU; ifp->if_ioctl = stf_ioctl; ifp->if_output = stf_output; ifp->if_snd.ifq_maxlen = ifqmaxlen; if_attach(ifp); bpfattach(ifp, DLT_NULL, sizeof(u_int32_t)); return (0); } static int stf_clone_destroy(struct if_clone *ifc, struct ifnet *ifp) { struct stf_softc *sc = ifp->if_softc; int err; err = encap_detach(sc->encap_cookie); KASSERT(err == 0, ("Unexpected error detaching encap_cookie")); mtx_destroy(&(sc)->sc_ro_mtx); bpfdetach(ifp); if_detach(ifp); if_free(ifp); free(sc, M_STF); ifc_free_unit(ifc, STFUNIT); return (0); } static int stfmodevent(mod, type, data) module_t mod; int type; void *data; { switch (type) { case MOD_LOAD: stf_cloner = if_clone_advanced(stfname, 0, stf_clone_match, stf_clone_create, stf_clone_destroy); break; case MOD_UNLOAD: if_clone_detach(stf_cloner); break; default: return (EOPNOTSUPP); } return (0); } static moduledata_t stf_mod = { "if_stf", stfmodevent, 0 }; DECLARE_MODULE(if_stf, stf_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); static int stf_encapcheck(m, off, proto, arg) const struct mbuf *m; int off; int proto; void *arg; { struct ip ip; struct stf_softc *sc; struct in_addr a, b, mask; struct in6_addr addr6, mask6; sc = (struct stf_softc *)arg; if (sc == NULL) return 0; if ((STF2IFP(sc)->if_flags & IFF_UP) == 0) return 0; /* IFF_LINK0 means "no decapsulation" */ if ((STF2IFP(sc)->if_flags & IFF_LINK0) != 0) return 0; if (proto != IPPROTO_IPV6) return 0; /* LINTED const cast */ m_copydata((struct mbuf *)(uintptr_t)m, 0, sizeof(ip), (caddr_t)&ip); if (ip.ip_v != 4) return 0; if (stf_getsrcifa6(STF2IFP(sc), &addr6, &mask6) != 0) return (0); /* * check if IPv4 dst matches the IPv4 address derived from the * local 6to4 address. * success on: dst = 10.1.1.1, ia6->ia_addr = 2002:0a01:0101:... */ if (bcmp(GET_V4(&addr6), &ip.ip_dst, sizeof(ip.ip_dst)) != 0) return 0; /* * check if IPv4 src matches the IPv4 address derived from the * local 6to4 address masked by prefixmask. * success on: src = 10.1.1.1, ia6->ia_addr = 2002:0a00:.../24 * fail on: src = 10.1.1.1, ia6->ia_addr = 2002:0b00:.../24 */ bzero(&a, sizeof(a)); bcopy(GET_V4(&addr6), &a, sizeof(a)); bcopy(GET_V4(&mask6), &mask, sizeof(mask)); a.s_addr &= mask.s_addr; b = ip.ip_src; b.s_addr &= mask.s_addr; if (a.s_addr != b.s_addr) return 0; /* stf interface makes single side match only */ return 32; } static int stf_getsrcifa6(struct ifnet *ifp, struct in6_addr *addr, struct in6_addr *mask) { struct ifaddr *ia; struct in_ifaddr *ia4; struct in6_ifaddr *ia6; struct sockaddr_in6 *sin6; struct in_addr in; if_addr_rlock(ifp); TAILQ_FOREACH(ia, &ifp->if_addrhead, ifa_link) { if (ia->ifa_addr->sa_family != AF_INET6) continue; sin6 = (struct sockaddr_in6 *)ia->ifa_addr; if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) continue; bcopy(GET_V4(&sin6->sin6_addr), &in, sizeof(in)); LIST_FOREACH(ia4, INADDR_HASH(in.s_addr), ia_hash) if (ia4->ia_addr.sin_addr.s_addr == in.s_addr) break; if (ia4 == NULL) continue; ia6 = (struct in6_ifaddr *)ia; *addr = sin6->sin6_addr; *mask = ia6->ia_prefixmask.sin6_addr; if_addr_runlock(ifp); return (0); } if_addr_runlock(ifp); return (ENOENT); } static int stf_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, struct nhop_info *ni) { struct stf_softc *sc; const struct sockaddr_in6 *dst6; struct in_addr in4; const void *ptr; u_int8_t tos; struct ip *ip; struct ip6_hdr *ip6; struct in6_addr addr6, mask6; int error; #ifdef MAC error = mac_ifnet_check_transmit(ifp, m); if (error) { m_freem(m); return (error); } #endif sc = ifp->if_softc; dst6 = (const struct sockaddr_in6 *)dst; /* just in case */ if ((ifp->if_flags & IFF_UP) == 0) { m_freem(m); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return ENETDOWN; } /* * If we don't have an ip4 address that match my inner ip6 address, * we shouldn't generate output. Without this check, we'll end up * using wrong IPv4 source. */ if (stf_getsrcifa6(ifp, &addr6, &mask6) != 0) { m_freem(m); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return ENETDOWN; } if (m->m_len < sizeof(*ip6)) { m = m_pullup(m, sizeof(*ip6)); if (!m) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return ENOBUFS; } } ip6 = mtod(m, struct ip6_hdr *); tos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; /* * Pickup the right outer dst addr from the list of candidates. * ip6_dst has priority as it may be able to give us shorter IPv4 hops. */ ptr = NULL; if (IN6_IS_ADDR_6TO4(&ip6->ip6_dst)) ptr = GET_V4(&ip6->ip6_dst); else if (IN6_IS_ADDR_6TO4(&dst6->sin6_addr)) ptr = GET_V4(&dst6->sin6_addr); else { m_freem(m); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return ENETUNREACH; } bcopy(ptr, &in4, sizeof(in4)); if (bpf_peers_present(ifp->if_bpf)) { /* * We need to prepend the address family as * a four byte field. Cons up a dummy header * to pacify bpf. This is safe because bpf * will only read from the mbuf (i.e., it won't * try to free it or keep a pointer a to it). */ u_int af = AF_INET6; bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m); } M_PREPEND(m, sizeof(struct ip), M_NOWAIT); if (m && m->m_len < sizeof(struct ip)) m = m_pullup(m, sizeof(struct ip)); if (m == NULL) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return ENOBUFS; } ip = mtod(m, struct ip *); bzero(ip, sizeof(*ip)); bcopy(GET_V4(&addr6), &ip->ip_src, sizeof(ip->ip_src)); bcopy(&in4, &ip->ip_dst, sizeof(ip->ip_dst)); ip->ip_p = IPPROTO_IPV6; ip->ip_ttl = ip_stf_ttl; ip->ip_len = htons(m->m_pkthdr.len); if (ifp->if_flags & IFF_LINK1) ip_ecn_ingress(ECN_ALLOWED, &ip->ip_tos, &tos); else ip_ecn_ingress(ECN_NOCARE, &ip->ip_tos, &tos); M_SETFIB(m, sc->sc_fibnum); if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); error = ip_output(m, NULL, NULL, 0, NULL, NULL); return error; } static int isrfc1918addr(in) struct in_addr *in; { /* * returns 1 if private address range: * 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 */ if (stf_permit_rfc1918 == 0 && ( (ntohl(in->s_addr) & 0xff000000) >> 24 == 10 || (ntohl(in->s_addr) & 0xfff00000) >> 16 == 172 * 256 + 16 || (ntohl(in->s_addr) & 0xffff0000) >> 16 == 192 * 256 + 168)) return 1; return 0; } static int stf_checkaddr4(sc, in, inifp) struct stf_softc *sc; struct in_addr *in; struct ifnet *inifp; /* incoming interface */ { struct in_ifaddr *ia4; /* * reject packets with the following address: * 224.0.0.0/4 0.0.0.0/8 127.0.0.0/8 255.0.0.0/8 */ if (IN_MULTICAST(ntohl(in->s_addr))) return -1; switch ((ntohl(in->s_addr) & 0xff000000) >> 24) { case 0: case 127: case 255: return -1; } /* * reject packets with private address range. * (requirement from RFC3056 section 2 1st paragraph) */ if (isrfc1918addr(in)) return -1; /* * reject packets with broadcast */ IN_IFADDR_RLOCK(); TAILQ_FOREACH(ia4, &V_in_ifaddrhead, ia_link) { if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0) continue; if (in->s_addr == ia4->ia_broadaddr.sin_addr.s_addr) { IN_IFADDR_RUNLOCK(); return -1; } } IN_IFADDR_RUNLOCK(); /* * perform ingress filter */ if (sc && (STF2IFP(sc)->if_flags & IFF_LINK2) == 0 && inifp) { struct nhop4_basic nh4; if (fib4_lookup_nh_basic(sc->sc_fibnum, *in, 0, &nh4) != 0) return (-1); if (nh4.nh_ifp != inifp) return (-1); } return 0; } static int stf_checkaddr6(sc, in6, inifp) struct stf_softc *sc; struct in6_addr *in6; struct ifnet *inifp; /* incoming interface */ { /* * check 6to4 addresses */ if (IN6_IS_ADDR_6TO4(in6)) { struct in_addr in4; bcopy(GET_V4(in6), &in4, sizeof(in4)); return stf_checkaddr4(sc, &in4, inifp); } /* * reject anything that look suspicious. the test is implemented * in ip6_input too, but we check here as well to * (1) reject bad packets earlier, and * (2) to be safe against future ip6_input change. */ if (IN6_IS_ADDR_V4COMPAT(in6) || IN6_IS_ADDR_V4MAPPED(in6)) return -1; return 0; } int in_stf_input(struct mbuf **mp, int *offp, int proto) { struct stf_softc *sc; struct ip *ip; struct ip6_hdr *ip6; struct mbuf *m; u_int8_t otos, itos; struct ifnet *ifp; int off; m = *mp; off = *offp; if (proto != IPPROTO_IPV6) { m_freem(m); return (IPPROTO_DONE); } ip = mtod(m, struct ip *); sc = (struct stf_softc *)encap_getarg(m); if (sc == NULL || (STF2IFP(sc)->if_flags & IFF_UP) == 0) { m_freem(m); return (IPPROTO_DONE); } ifp = STF2IFP(sc); #ifdef MAC mac_ifnet_create_mbuf(ifp, m); #endif /* * perform sanity check against outer src/dst. * for source, perform ingress filter as well. */ if (stf_checkaddr4(sc, &ip->ip_dst, NULL) < 0 || stf_checkaddr4(sc, &ip->ip_src, m->m_pkthdr.rcvif) < 0) { m_freem(m); return (IPPROTO_DONE); } otos = ip->ip_tos; m_adj(m, off); if (m->m_len < sizeof(*ip6)) { m = m_pullup(m, sizeof(*ip6)); if (!m) return (IPPROTO_DONE); } ip6 = mtod(m, struct ip6_hdr *); /* * perform sanity check against inner src/dst. * for source, perform ingress filter as well. */ if (stf_checkaddr6(sc, &ip6->ip6_dst, NULL) < 0 || stf_checkaddr6(sc, &ip6->ip6_src, m->m_pkthdr.rcvif) < 0) { m_freem(m); return (IPPROTO_DONE); } itos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; if ((ifp->if_flags & IFF_LINK1) != 0) ip_ecn_egress(ECN_ALLOWED, &otos, &itos); else ip_ecn_egress(ECN_NOCARE, &otos, &itos); ip6->ip6_flow &= ~htonl(0xff << 20); ip6->ip6_flow |= htonl((u_int32_t)itos << 20); m->m_pkthdr.rcvif = ifp; if (bpf_peers_present(ifp->if_bpf)) { /* * We need to prepend the address family as * a four byte field. Cons up a dummy header * to pacify bpf. This is safe because bpf * will only read from the mbuf (i.e., it won't * try to free it or keep a pointer a to it). */ u_int32_t af = AF_INET6; bpf_mtap2(ifp->if_bpf, &af, sizeof(af), m); } /* * Put the packet to the network layer input queue according to the * specified address family. * See net/if_gif.c for possible issues with packet processing * reorder due to extra queueing. */ if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); M_SETFIB(m, ifp->if_fib); netisr_dispatch(NETISR_IPV6, m); return (IPPROTO_DONE); } static int stf_ioctl(ifp, cmd, data) struct ifnet *ifp; u_long cmd; caddr_t data; { struct ifaddr *ifa; struct ifreq *ifr; struct sockaddr_in6 *sin6; struct in_addr addr; int error, mtu; error = 0; switch (cmd) { case SIOCSIFADDR: ifa = (struct ifaddr *)data; if (ifa == NULL || ifa->ifa_addr->sa_family != AF_INET6) { error = EAFNOSUPPORT; break; } sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; if (!IN6_IS_ADDR_6TO4(&sin6->sin6_addr)) { error = EINVAL; break; } bcopy(GET_V4(&sin6->sin6_addr), &addr, sizeof(addr)); if (isrfc1918addr(&addr)) { error = EINVAL; break; } ifp->if_flags |= IFF_UP; break; case SIOCADDMULTI: case SIOCDELMULTI: ifr = (struct ifreq *)data; if (ifr && ifr->ifr_addr.sa_family == AF_INET6) ; else error = EAFNOSUPPORT; break; case SIOCGIFMTU: break; case SIOCSIFMTU: ifr = (struct ifreq *)data; mtu = ifr->ifr_mtu; /* RFC 4213 3.2 ideal world MTU */ if (mtu < IPV6_MINMTU || mtu > IF_MAXMTU - 20) return (EINVAL); ifp->if_mtu = mtu; break; default: error = EINVAL; break; } return error; } Index: projects/routing/sys/netinet6/nd6.h =================================================================== --- projects/routing/sys/netinet6/nd6.h (revision 274331) +++ projects/routing/sys/netinet6/nd6.h (revision 274332) @@ -1,454 +1,454 @@ /*- * 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. * * $KAME: nd6.h,v 1.76 2001/12/18 02:10:31 itojun Exp $ * $FreeBSD$ */ #ifndef _NETINET6_ND6_H_ #define _NETINET6_ND6_H_ /* see net/route.h, or net/if_inarp.h */ #ifndef RTF_ANNOUNCE #define RTF_ANNOUNCE RTF_PROTO2 #endif #include #include struct llentry; #define ND6_LLINFO_NOSTATE -2 /* * We don't need the WAITDELETE state any more, but we keep the definition * in a comment line instead of removing it. This is necessary to avoid * unintentionally reusing the value for another purpose, which might * affect backward compatibility with old applications. * (20000711 jinmei@kame.net) */ /* #define ND6_LLINFO_WAITDELETE -1 */ #define ND6_LLINFO_INCOMPLETE 0 #define ND6_LLINFO_REACHABLE 1 #define ND6_LLINFO_STALE 2 #define ND6_LLINFO_DELAY 3 #define ND6_LLINFO_PROBE 4 #define ND6_IS_LLINFO_PROBREACH(n) ((n)->ln_state > ND6_LLINFO_INCOMPLETE) #define ND6_LLINFO_PERMANENT(n) (((n)->la_expire == 0) && ((n)->ln_state > ND6_LLINFO_INCOMPLETE)) struct nd_ifinfo { u_int32_t linkmtu; /* LinkMTU */ u_int32_t maxmtu; /* Upper bound of LinkMTU */ u_int32_t basereachable; /* BaseReachableTime */ u_int32_t reachable; /* Reachable Time */ u_int32_t retrans; /* Retrans Timer */ u_int32_t flags; /* Flags */ int recalctm; /* BaseReacable re-calculation timer */ u_int8_t chlim; /* CurHopLimit */ u_int8_t initialized; /* Flag to see the entry is initialized */ /* the following 3 members are for privacy extension for addrconf */ u_int8_t randomseed0[8]; /* upper 64 bits of MD5 digest */ u_int8_t randomseed1[8]; /* lower 64 bits (usually the EUI64 IFID) */ u_int8_t randomid[8]; /* current random ID */ }; #define ND6_IFF_PERFORMNUD 0x1 #define ND6_IFF_ACCEPT_RTADV 0x2 #define ND6_IFF_PREFER_SOURCE 0x4 /* Not used in FreeBSD. */ #define ND6_IFF_IFDISABLED 0x8 /* IPv6 operation is disabled due to * DAD failure. (XXX: not ND-specific) */ #define ND6_IFF_DONT_SET_IFROUTE 0x10 #define ND6_IFF_AUTO_LINKLOCAL 0x20 #define ND6_IFF_NO_RADR 0x40 #define ND6_IFF_NO_PREFER_IFACE 0x80 /* XXX: not related to ND. */ #define ND6_CREATE LLE_CREATE #define ND6_EXCLUSIVE LLE_EXCLUSIVE #ifdef _KERNEL #define ND_IFINFO(ifp) \ (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->nd_ifinfo) #define IN6_LINKMTU(ifp) \ ((ND_IFINFO(ifp)->linkmtu && ND_IFINFO(ifp)->linkmtu < (ifp)->if_mtu) \ ? ND_IFINFO(ifp)->linkmtu \ : ((ND_IFINFO(ifp)->maxmtu && ND_IFINFO(ifp)->maxmtu < (ifp)->if_mtu) \ ? ND_IFINFO(ifp)->maxmtu : (ifp)->if_mtu)) #endif struct in6_nbrinfo { char ifname[IFNAMSIZ]; /* if name, e.g. "en0" */ struct in6_addr addr; /* IPv6 address of the neighbor */ long asked; /* number of queries already sent for this addr */ int isrouter; /* if it acts as a router */ int state; /* reachability state */ int expire; /* lifetime for NDP state transition */ }; #define DRLSTSIZ 10 #define PRLSTSIZ 10 struct in6_drlist { char ifname[IFNAMSIZ]; struct { struct in6_addr rtaddr; u_char flags; u_short rtlifetime; u_long expire; u_short if_index; } defrouter[DRLSTSIZ]; }; struct in6_defrouter { struct sockaddr_in6 rtaddr; u_char flags; u_short rtlifetime; u_long expire; u_short if_index; }; #ifdef _KERNEL struct in6_oprlist { char ifname[IFNAMSIZ]; struct { struct in6_addr prefix; struct prf_ra raflags; u_char prefixlen; u_char origin; u_long vltime; u_long pltime; u_long expire; u_short if_index; u_short advrtrs; /* number of advertisement routers */ struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ } prefix[PRLSTSIZ]; }; #endif struct in6_prlist { char ifname[IFNAMSIZ]; struct { struct in6_addr prefix; struct prf_ra raflags; u_char prefixlen; u_char origin; u_int32_t vltime; u_int32_t pltime; time_t expire; u_short if_index; u_short advrtrs; /* number of advertisement routers */ struct in6_addr advrtr[DRLSTSIZ]; /* XXX: explicit limit */ } prefix[PRLSTSIZ]; }; struct in6_prefix { struct sockaddr_in6 prefix; struct prf_ra raflags; u_char prefixlen; u_char origin; u_int32_t vltime; u_int32_t pltime; time_t expire; u_int32_t flags; int refcnt; u_short if_index; u_short advrtrs; /* number of advertisement routers */ /* struct sockaddr_in6 advrtr[] */ }; #ifdef _KERNEL struct in6_ondireq { char ifname[IFNAMSIZ]; struct { u_int32_t linkmtu; /* LinkMTU */ u_int32_t maxmtu; /* Upper bound of LinkMTU */ u_int32_t basereachable; /* BaseReachableTime */ u_int32_t reachable; /* Reachable Time */ u_int32_t retrans; /* Retrans Timer */ u_int32_t flags; /* Flags */ int recalctm; /* BaseReacable re-calculation timer */ u_int8_t chlim; /* CurHopLimit */ u_int8_t receivedra; } ndi; }; #endif struct in6_ndireq { char ifname[IFNAMSIZ]; struct nd_ifinfo ndi; }; struct in6_ndifreq { char ifname[IFNAMSIZ]; u_long ifindex; }; /* Prefix status */ #define NDPRF_ONLINK 0x1 #define NDPRF_DETACHED 0x2 /* protocol constants */ #define MAX_RTR_SOLICITATION_DELAY 1 /* 1sec */ #define RTR_SOLICITATION_INTERVAL 4 /* 4sec */ #define MAX_RTR_SOLICITATIONS 3 #define ND6_INFINITE_LIFETIME 0xffffffff #ifdef _KERNEL /* node constants */ #define MAX_REACHABLE_TIME 3600000 /* msec */ #define REACHABLE_TIME 30000 /* msec */ #define RETRANS_TIMER 1000 /* msec */ #define MIN_RANDOM_FACTOR 512 /* 1024 * 0.5 */ #define MAX_RANDOM_FACTOR 1536 /* 1024 * 1.5 */ #define DEF_TEMP_VALID_LIFETIME 604800 /* 1 week */ #define DEF_TEMP_PREFERRED_LIFETIME 86400 /* 1 day */ #define TEMPADDR_REGEN_ADVANCE 5 /* sec */ #define MAX_TEMP_DESYNC_FACTOR 600 /* 10 min */ #define ND_COMPUTE_RTIME(x) \ (((MIN_RANDOM_FACTOR * (x >> 10)) + (arc4random() & \ ((MAX_RANDOM_FACTOR - MIN_RANDOM_FACTOR) * (x >> 10)))) /1000) TAILQ_HEAD(nd_drhead, nd_defrouter); struct nd_defrouter { TAILQ_ENTRY(nd_defrouter) dr_entry; struct in6_addr rtaddr; u_char flags; /* flags on RA message */ u_short rtlifetime; u_long expire; struct ifnet *ifp; int installed; /* is installed into kernel routing table */ }; struct nd_prefixctl { struct ifnet *ndpr_ifp; /* prefix */ struct sockaddr_in6 ndpr_prefix; u_char ndpr_plen; u_int32_t ndpr_vltime; /* advertised valid lifetime */ u_int32_t ndpr_pltime; /* advertised preferred lifetime */ struct prf_ra ndpr_flags; }; struct nd_prefix { struct ifnet *ndpr_ifp; LIST_ENTRY(nd_prefix) ndpr_entry; struct sockaddr_in6 ndpr_prefix; /* prefix */ struct in6_addr ndpr_mask; /* netmask derived from the prefix */ u_int32_t ndpr_vltime; /* advertised valid lifetime */ u_int32_t ndpr_pltime; /* advertised preferred lifetime */ time_t ndpr_expire; /* expiration time of the prefix */ time_t ndpr_preferred; /* preferred time of the prefix */ time_t ndpr_lastupdate; /* reception time of last advertisement */ struct prf_ra ndpr_flags; u_int32_t ndpr_stateflags; /* actual state flags */ /* list of routers that advertise the prefix: */ LIST_HEAD(pr_rtrhead, nd_pfxrouter) ndpr_advrtrs; u_char ndpr_plen; int ndpr_refcnt; /* reference couter from addresses */ }; #define ndpr_raf ndpr_flags #define ndpr_raf_onlink ndpr_flags.onlink #define ndpr_raf_auto ndpr_flags.autonomous #define ndpr_raf_router ndpr_flags.router /* * Message format for use in obtaining information about prefixes * from inet6 sysctl function */ struct inet6_ndpr_msghdr { u_short inpm_msglen; /* to skip over non-understood messages */ u_char inpm_version; /* future binary compatibility */ u_char inpm_type; /* message type */ struct in6_addr inpm_prefix; u_long prm_vltim; u_long prm_pltime; u_long prm_expire; u_long prm_preferred; struct in6_prflags prm_flags; u_short prm_index; /* index for associated ifp */ u_char prm_plen; /* length of prefix in bits */ }; #define prm_raf_onlink prm_flags.prf_ra.onlink #define prm_raf_auto prm_flags.prf_ra.autonomous #define prm_statef_onlink prm_flags.prf_state.onlink #define prm_rrf_decrvalid prm_flags.prf_rr.decrvalid #define prm_rrf_decrprefd prm_flags.prf_rr.decrprefd struct nd_pfxrouter { LIST_ENTRY(nd_pfxrouter) pfr_entry; struct nd_defrouter *router; }; LIST_HEAD(nd_prhead, nd_prefix); /* nd6.c */ VNET_DECLARE(int, nd6_prune); VNET_DECLARE(int, nd6_delay); VNET_DECLARE(int, nd6_umaxtries); VNET_DECLARE(int, nd6_mmaxtries); VNET_DECLARE(int, nd6_useloopback); VNET_DECLARE(int, nd6_maxnudhint); VNET_DECLARE(int, nd6_gctimer); VNET_DECLARE(struct nd_drhead, nd_defrouter); VNET_DECLARE(struct nd_prhead, nd_prefix); VNET_DECLARE(int, nd6_debug); VNET_DECLARE(int, nd6_onlink_ns_rfc4861); #define V_nd6_prune VNET(nd6_prune) #define V_nd6_delay VNET(nd6_delay) #define V_nd6_umaxtries VNET(nd6_umaxtries) #define V_nd6_mmaxtries VNET(nd6_mmaxtries) #define V_nd6_useloopback VNET(nd6_useloopback) #define V_nd6_maxnudhint VNET(nd6_maxnudhint) #define V_nd6_gctimer VNET(nd6_gctimer) #define V_nd_defrouter VNET(nd_defrouter) #define V_nd_prefix VNET(nd_prefix) #define V_nd6_debug VNET(nd6_debug) #define V_nd6_onlink_ns_rfc4861 VNET(nd6_onlink_ns_rfc4861) #define nd6log(x) do { if (V_nd6_debug) log x; } while (/*CONSTCOND*/ 0) VNET_DECLARE(struct callout, nd6_timer_ch); #define V_nd6_timer_ch VNET(nd6_timer_ch) /* nd6_rtr.c */ VNET_DECLARE(int, nd6_defifindex); VNET_DECLARE(int, ip6_desync_factor); /* seconds */ VNET_DECLARE(u_int32_t, ip6_temp_preferred_lifetime); /* seconds */ VNET_DECLARE(u_int32_t, ip6_temp_valid_lifetime); /* seconds */ VNET_DECLARE(int, ip6_temp_regen_advance); /* seconds */ #define V_nd6_defifindex VNET(nd6_defifindex) #define V_ip6_desync_factor VNET(ip6_desync_factor) #define V_ip6_temp_preferred_lifetime VNET(ip6_temp_preferred_lifetime) #define V_ip6_temp_valid_lifetime VNET(ip6_temp_valid_lifetime) #define V_ip6_temp_regen_advance VNET(ip6_temp_regen_advance) union nd_opts { struct nd_opt_hdr *nd_opt_array[8]; /* max = target address list */ struct { struct nd_opt_hdr *zero; struct nd_opt_hdr *src_lladdr; struct nd_opt_hdr *tgt_lladdr; struct nd_opt_prefix_info *pi_beg; /* multiple opts, start */ struct nd_opt_rd_hdr *rh; struct nd_opt_mtu *mtu; struct nd_opt_hdr *search; /* multiple opts */ struct nd_opt_hdr *last; /* multiple opts */ int done; struct nd_opt_prefix_info *pi_end;/* multiple opts, end */ } nd_opt_each; }; #define nd_opts_src_lladdr nd_opt_each.src_lladdr #define nd_opts_tgt_lladdr nd_opt_each.tgt_lladdr #define nd_opts_pi nd_opt_each.pi_beg #define nd_opts_pi_end nd_opt_each.pi_end #define nd_opts_rh nd_opt_each.rh #define nd_opts_mtu nd_opt_each.mtu #define nd_opts_search nd_opt_each.search #define nd_opts_last nd_opt_each.last #define nd_opts_done nd_opt_each.done /* XXX: need nd6_var.h?? */ /* nd6.c */ void nd6_init(void); #ifdef VIMAGE void nd6_destroy(void); #endif struct nd_ifinfo *nd6_ifattach(struct ifnet *); void nd6_ifdetach(struct nd_ifinfo *); int nd6_is_addr_neighbor(struct sockaddr_in6 *, struct ifnet *); void nd6_option_init(void *, int, union nd_opts *); struct nd_opt_hdr *nd6_option(union nd_opts *); int nd6_options(union nd_opts *); struct llentry *nd6_lookup(struct in6_addr *, int, struct ifnet *); void nd6_setmtu(struct ifnet *); void nd6_llinfo_settimer(struct llentry *, long); void nd6_llinfo_settimer_locked(struct llentry *, long); void nd6_timer(void *); void nd6_purge(struct ifnet *); void nd6_nud_hint(struct rtentry *, struct in6_addr *, int); int nd6_resolve(struct ifnet *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *); int nd6_ioctl(u_long, caddr_t, struct ifnet *); struct llentry *nd6_cache_lladdr(struct ifnet *, struct in6_addr *, char *, int, int, int); int nd6_output(struct ifnet *, struct ifnet *, struct mbuf *, struct sockaddr_in6 *, struct rtentry *); int nd6_output_lle(struct ifnet *, struct ifnet *, struct mbuf *, struct sockaddr_in6 *, struct rtentry *, struct llentry *, struct mbuf **); int nd6_output_flush(struct ifnet *, struct ifnet *, struct mbuf *, - struct sockaddr_in6 *, struct route *); + struct sockaddr_in6 *); int nd6_need_cache(struct ifnet *); int nd6_add_ifa_lle(struct in6_ifaddr *); void nd6_rem_ifa_lle(struct in6_ifaddr *); int nd6_storelladdr(struct ifnet *, struct mbuf *, const struct sockaddr *, u_char *, struct llentry **); /* nd6_nbr.c */ void nd6_na_input(struct mbuf *, int, int); void nd6_na_output(struct ifnet *, const struct in6_addr *, const struct in6_addr *, u_long, int, struct sockaddr *); void nd6_ns_input(struct mbuf *, int, int); void nd6_ns_output(struct ifnet *, const struct in6_addr *, const struct in6_addr *, struct llentry *, int); caddr_t nd6_ifptomac(struct ifnet *); void nd6_dad_start(struct ifaddr *, int); void nd6_dad_stop(struct ifaddr *); void nd6_dad_duplicated(struct ifaddr *); /* nd6_rtr.c */ void nd6_rs_input(struct mbuf *, int, int); void nd6_ra_input(struct mbuf *, int, int); void prelist_del(struct nd_prefix *); void defrouter_reset(void); void defrouter_select(void); void defrtrlist_del(struct nd_defrouter *); void prelist_remove(struct nd_prefix *); int nd6_prelist_add(struct nd_prefixctl *, struct nd_defrouter *, struct nd_prefix **); void pfxlist_onlink_check(void); struct nd_defrouter *defrouter_lookup(struct in6_addr *, struct ifnet *); struct nd_prefix *nd6_prefix_lookup(struct nd_prefixctl *); void rt6_flush(struct in6_addr *, struct ifnet *); int nd6_setdefaultiface(int); int in6_tmpifadd(const struct in6_ifaddr *, int, int); #endif /* _KERNEL */ #endif /* _NETINET6_ND6_H_ */