/* $OpenBSD: ip_spd.c,v 1.33 2001/06/27 01:34:07 angelos Exp $ */ /* * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) * * Copyright (c) 2000-2001 Angelos D. Keromytis. * * Permission to use, copy, and modify this software with or without fee * is hereby granted, provided that this entire notice is included in * all copies of any software which is or includes a copy or * modification of this software. * You may use this code under the GNU public license if you so wish. Please * contribute changes back to the authors under this freer than GPL license * so that we may further the use of strong encryption without limitations to * all. * * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR * PURPOSE. */ #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif /* INET */ #ifdef INET6 #ifndef INET #include #endif #include #endif /* INET6 */ #include #include #ifdef ENCDEBUG #define DPRINTF(x) if (encdebug) printf x #else #define DPRINTF(x) #endif struct pool ipsec_policy_pool; struct pool ipsec_acquire_pool; int ipsec_policy_pool_initialized = 0; int ipsec_acquire_pool_initialized = 0; /* * Lookup at the SPD based on the headers contained on the mbuf. The second * argument indicates what protocol family the header at the beginning of * the mbuf is. hlen is the the offset of the transport protocol header * in the mbuf. * * Return combinations (of return value and in *error): * - NULL/0 -> no IPsec required on packet * - NULL/-EINVAL -> silently drop the packet * - NULL/errno -> drop packet and return error * or a pointer to a TDB (and 0 in *error). * * In the case of incoming flows, only the first three combinations are * returned. */ struct tdb * ipsp_spd_lookup(struct mbuf *m, int af, int hlen, int *error, int direction, struct tdb *tdbp, struct inpcb *inp) { struct route_enc re0, *re = &re0; union sockaddr_union sdst, ssrc; struct sockaddr_encap *ddst; struct ipsec_policy *ipo; int signore = 0, dignore = 0; /* * If there are no flows in place, there's no point * continuing with the SPD lookup. */ if (!ipsec_in_use && inp == NULL) { *error = 0; return NULL; } /* * If an input packet is destined to a BYPASS socket, just accept it. */ if ((inp != NULL) && (direction == IPSP_DIRECTION_IN) && (inp->inp_seclevel[SL_ESP_TRANS] == IPSEC_LEVEL_BYPASS) && (inp->inp_seclevel[SL_ESP_NETWORK] == IPSEC_LEVEL_BYPASS) && (inp->inp_seclevel[SL_AUTH] == IPSEC_LEVEL_BYPASS)) { *error = 0; return NULL; } bzero((caddr_t) re, sizeof(struct route_enc)); bzero((caddr_t) &sdst, sizeof(union sockaddr_union)); bzero((caddr_t) &ssrc, sizeof(union sockaddr_union)); ddst = (struct sockaddr_encap *) &re->re_dst; ddst->sen_family = PF_KEY; ddst->sen_len = SENT_LEN; switch (af) { #ifdef INET case AF_INET: ddst->sen_direction = direction; ddst->sen_type = SENT_IP4; m_copydata(m, offsetof(struct ip, ip_src), sizeof(struct in_addr), (caddr_t) &(ddst->sen_ip_src)); m_copydata(m, offsetof(struct ip, ip_dst), sizeof(struct in_addr), (caddr_t) &(ddst->sen_ip_dst)); m_copydata(m, offsetof(struct ip, ip_p), sizeof(u_int8_t), (caddr_t) &(ddst->sen_proto)); sdst.sin.sin_family = ssrc.sin.sin_family = AF_INET; sdst.sin.sin_len = ssrc.sin.sin_len = sizeof(struct sockaddr_in); ssrc.sin.sin_addr = ddst->sen_ip_src; sdst.sin.sin_addr = ddst->sen_ip_dst; /* * If TCP/UDP, extract the port numbers to use in the lookup. */ switch (ddst->sen_proto) { case IPPROTO_UDP: case IPPROTO_TCP: /* Make sure there's enough data in the packet. */ if (m->m_pkthdr.len < hlen + 2 * sizeof(u_int16_t)) { *error = EINVAL; return NULL; } /* * Luckily, the offset of the src/dst ports in * both the UDP and TCP headers is the same (first * two 16-bit values in the respective headers), * so we can just copy them. */ m_copydata(m, hlen, sizeof(u_int16_t), (caddr_t) &(ddst->sen_sport)); m_copydata(m, hlen + sizeof(u_int16_t), sizeof(u_int16_t), (caddr_t) &(ddst->sen_dport)); break; default: ddst->sen_sport = 0; ddst->sen_dport = 0; } break; #endif /* INET */ #ifdef INET6 case AF_INET6: ddst->sen_type = SENT_IP6; ddst->sen_ip6_direction = direction; m_copydata(m, offsetof(struct ip6_hdr, ip6_src), sizeof(struct in6_addr), (caddr_t) &(ddst->sen_ip6_src)); m_copydata(m, offsetof(struct ip6_hdr, ip6_dst), sizeof(struct in6_addr), (caddr_t) &(ddst->sen_ip6_dst)); m_copydata(m, offsetof(struct ip6_hdr, ip6_nxt), sizeof(u_int8_t), (caddr_t) &(ddst->sen_ip6_proto)); sdst.sin6.sin6_family = ssrc.sin6.sin6_family = AF_INET6; sdst.sin6.sin6_len = ssrc.sin6.sin6_family = sizeof(struct sockaddr_in6); ssrc.sin6.sin6_addr = ddst->sen_ip6_src; sdst.sin6.sin6_addr = ddst->sen_ip6_dst; /* * If TCP/UDP, extract the port numbers to use in the lookup. */ switch (ddst->sen_ip6_proto) { case IPPROTO_UDP: case IPPROTO_TCP: /* Make sure there's enough data in the packet. */ if (m->m_pkthdr.len < hlen + 2 * sizeof(u_int16_t)) { *error = EINVAL; return NULL; } /* * Luckily, the offset of the src/dst ports in * both the UDP and TCP headers is the same * (first two 16-bit values in the respective * headers), so we can just copy them. */ m_copydata(m, hlen, sizeof(u_int16_t), (caddr_t) &(ddst->sen_ip6_sport)); m_copydata(m, hlen + sizeof(u_int16_t), sizeof(u_int16_t), (caddr_t) &(ddst->sen_ip6_dport)); break; default: ddst->sen_ip6_sport = 0; ddst->sen_ip6_dport = 0; } break; #endif /* INET6 */ default: *error = EAFNOSUPPORT; return NULL; } /* Actual SPD lookup. */ rtalloc((struct route *) re); if (re->re_rt == NULL) { /* * Return whatever the socket requirements are, there are no * system-wide policies. */ *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, NULL); } /* Sanity check. */ if ((re->re_rt->rt_gateway == NULL) || (((struct sockaddr_encap *) re->re_rt->rt_gateway)->sen_type != SENT_IPSP)) { RTFREE(re->re_rt); *error = EHOSTUNREACH; return NULL; } ipo = ((struct sockaddr_encap *) (re->re_rt->rt_gateway))->sen_ipsp; RTFREE(re->re_rt); if (ipo == NULL) { *error = EHOSTUNREACH; return NULL; } switch (ipo->ipo_type) { case IPSP_PERMIT: *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); case IPSP_DENY: *error = EHOSTUNREACH; return NULL; case IPSP_IPSEC_USE: case IPSP_IPSEC_ACQUIRE: case IPSP_IPSEC_REQUIRE: case IPSP_IPSEC_DONTACQ: /* Nothing more needed here. */ break; default: *error = EINVAL; return NULL; } /* Check for non-specific destination in the policy. */ switch (ipo->ipo_dst.sa.sa_family) { #ifdef INET case AF_INET: if ((ipo->ipo_dst.sin.sin_addr.s_addr == INADDR_ANY) || (ipo->ipo_dst.sin.sin_addr.s_addr == INADDR_BROADCAST)) dignore = 1; break; #endif /* INET */ #ifdef INET6 case AF_INET6: if ((IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_dst.sin6.sin6_addr)) || (bcmp(&ipo->ipo_dst.sin6.sin6_addr, &in6mask128, sizeof(in6mask128)))) dignore = 1; break; #endif /* INET6 */ } /* Likewise for source. */ switch (ipo->ipo_src.sa.sa_family) { #ifdef INET case AF_INET: if (ipo->ipo_src.sin.sin_addr.s_addr == INADDR_ANY) signore = 1; break; #endif /* INET */ #ifdef INET6 case AF_INET6: if (IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_src.sin6.sin6_addr)) signore = 1; break; #endif /* INET6 */ } /* Do we have a cached entry ? If so, check if it's still valid. */ if ((ipo->ipo_tdb) && (ipo->ipo_tdb->tdb_flags & TDBF_INVALID)) { TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); ipo->ipo_tdb = NULL; } /* Outgoing packet policy check. */ if (direction == IPSP_DIRECTION_OUT) { /* * If the packet is destined for the policy-specified * gateway/endhost, and the socket has the BYPASS * option set, skip IPsec processing. */ if ((inp != NULL) && (inp->inp_seclevel[SL_ESP_TRANS] == IPSEC_LEVEL_BYPASS) && (inp->inp_seclevel[SL_ESP_NETWORK] == IPSEC_LEVEL_BYPASS) && (inp->inp_seclevel[SL_AUTH] == IPSEC_LEVEL_BYPASS)) { /* Direct match. */ if (!bcmp(&sdst, &ipo->ipo_dst, sdst.sa.sa_len) || dignore) { *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } } /* Check that the cached TDB (if present), is appropriate. */ if (ipo->ipo_tdb) { if ((ipo->ipo_last_searched <= ipsec_last_added) || (ipo->ipo_sproto != ipo->ipo_tdb->tdb_sproto) || bcmp(dignore ? &sdst : &ipo->ipo_dst, &ipo->ipo_tdb->tdb_dst, ipo->ipo_tdb->tdb_dst.sa.sa_len)) goto nomatchout; /* Match source ID. */ if (ipo->ipo_srcid) { if (ipo->ipo_tdb->tdb_srcid == NULL || !ipsp_ref_match(ipo->ipo_srcid, ipo->ipo_tdb->tdb_srcid)) goto nomatchout; } /* Match destination ID. */ if (ipo->ipo_dstid) { if (ipo->ipo_tdb->tdb_dstid == NULL || !ipsp_ref_match(ipo->ipo_dstid, ipo->ipo_tdb->tdb_dstid)) goto nomatchout; } /* Match local credentials used. */ if (ipo->ipo_local_cred) { if (ipo->ipo_tdb->tdb_local_cred == NULL || !ipsp_ref_match(ipo->ipo_local_cred, ipo->ipo_tdb->tdb_local_cred)) goto nomatchout; } /* Cached entry is good. */ return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); nomatchout: /* Cached TDB was not good. */ TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); ipo->ipo_tdb = NULL; ipo->ipo_last_searched = 0; } /* * If no SA has been added since the last time we did a * lookup, there's no point searching for one. However, if the * destination gateway is left unspecified (or is all-1's), * always lookup since this is a generic-match rule * (otherwise, we can have situations where SAs to some * destinations exist but are not used, possibly leading to an * explosion in the number of acquired SAs). */ if (ipo->ipo_last_searched <= ipsec_last_added) { /* "Touch" the entry. */ ipo->ipo_last_searched = time.tv_sec; /* Find an appropriate SA from the existing ones. */ ipo->ipo_tdb = gettdbbyaddr(dignore ? &sdst : &ipo->ipo_dst, ipo, m, af); if (ipo->ipo_tdb) { TAILQ_INSERT_TAIL(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } } /* So, we don't have an SA -- just a policy. */ switch (ipo->ipo_type) { case IPSP_IPSEC_REQUIRE: /* Acquire SA through key management. */ if (ipsp_acquire_sa(ipo, dignore ? &sdst : &ipo->ipo_dst, signore ? NULL : &ipo->ipo_src, ddst, m) != 0) { *error = EACCES; return NULL; } /* Fall through */ case IPSP_IPSEC_DONTACQ: *error = -EINVAL; /* Silently drop packet. */ return NULL; case IPSP_IPSEC_ACQUIRE: /* Acquire SA through key management. */ if (ipsp_acquire_sa(ipo, dignore ? &sdst : &ipo->ipo_dst, signore ? NULL : &ipo->ipo_src, ddst, NULL) != 0) { *error = EACCES; return NULL; } /* Fall through */ case IPSP_IPSEC_USE: *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } } else { /* IPSP_DIRECTION_IN */ if (tdbp != NULL) { /* Direct match in the cache. */ if (ipo->ipo_tdb == tdbp) { *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } if (bcmp(dignore ? &ssrc : &ipo->ipo_dst, &tdbp->tdb_src, tdbp->tdb_src.sa.sa_len) || (ipo->ipo_sproto != tdbp->tdb_sproto)) goto nomatchin; /* Match source ID. */ if (ipo->ipo_srcid) { if (tdbp->tdb_dstid == NULL || !ipsp_ref_match(ipo->ipo_srcid, tdbp->tdb_dstid)) goto nomatchin; } /* Match destination ID. */ if (ipo->ipo_dstid) { if (tdbp->tdb_srcid == NULL || !ipsp_ref_match(ipo->ipo_dstid, tdbp->tdb_srcid)) goto nomatchin; } /* Add it to the cache. */ if (ipo->ipo_tdb) TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); ipo->ipo_tdb = tdbp; TAILQ_INSERT_TAIL(&tdbp->tdb_policy_head, ipo, ipo_tdb_next); *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); nomatchin: /* Nothing needed here, falling through */ } /* Check whether cached entry applies. */ if (ipo->ipo_tdb) { /* * We only need to check that the correct * security protocol and security gateway are * set; credentials/IDs will be the same, * since the cached entry is linked on this * policy. */ if (ipo->ipo_sproto == ipo->ipo_tdb->tdb_sproto && !bcmp(&ipo->ipo_tdb->tdb_src , dignore ? &ssrc : &ipo->ipo_dst, ipo->ipo_tdb->tdb_src.sa.sa_len)) goto skipinputsearch; /* Not applicable, unlink. */ TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); ipo->ipo_tdb = NULL; } /* Find whether there exists an appropriate SA. */ if (ipo->ipo_last_searched <= ipsec_last_added) { ipo->ipo_last_searched = time.tv_sec; /* "touch" */ ipo->ipo_tdb = gettdbbysrc(dignore ? &ssrc : &ipo->ipo_dst, ipo, m, af); if (ipo->ipo_tdb) TAILQ_INSERT_TAIL(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); } skipinputsearch: switch (ipo->ipo_type) { case IPSP_IPSEC_REQUIRE: /* If appropriate SA exists, don't acquire another. */ if (ipo->ipo_tdb) { *error = -EINVAL; return NULL; } /* Acquire SA through key management. */ if ((*error = ipsp_acquire_sa(ipo, dignore ? &ssrc : &ipo->ipo_dst, signore ? NULL : &ipo->ipo_src, ddst, m)) != 0) return NULL; /* Fall through */ case IPSP_IPSEC_DONTACQ: /* Drop packet. */ *error = -EINVAL; return NULL; case IPSP_IPSEC_ACQUIRE: /* If appropriate SA exists, don't acquire another. */ if (ipo->ipo_tdb) { *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } /* Acquire SA through key management. */ if ((*error = ipsp_acquire_sa(ipo, dignore ? &ssrc : &ipo->ipo_dst, signore ? NULL : &ipo->ipo_src, ddst, NULL)) != 0) return NULL; /* Fall through */ case IPSP_IPSEC_USE: *error = 0; return ipsp_spd_inp(m, af, hlen, error, direction, tdbp, inp, ipo); } } /* Shouldn't ever get this far. */ *error = EINVAL; return NULL; } /* * Delete a policy from the SPD. */ int ipsec_delete_policy(struct ipsec_policy *ipo) { int err = 0; /* Delete */ if (!(ipo->ipo_flags & IPSP_POLICY_SOCKET)) err = rtrequest(RTM_DELETE, (struct sockaddr *) &ipo->ipo_addr, (struct sockaddr *) 0, (struct sockaddr *) &ipo->ipo_mask, 0, (struct rtentry **) 0); if (ipo->ipo_tdb) TAILQ_REMOVE(&ipo->ipo_tdb->tdb_policy_head, ipo, ipo_tdb_next); TAILQ_REMOVE(&ipsec_policy_head, ipo, ipo_list); if (ipo->ipo_srcid) ipsp_reffree(ipo->ipo_srcid); if (ipo->ipo_dstid) ipsp_reffree(ipo->ipo_dstid); if (ipo->ipo_local_cred) ipsp_reffree(ipo->ipo_local_cred); if (ipo->ipo_local_auth) ipsp_reffree(ipo->ipo_local_cred); pool_put(&ipsec_policy_pool, ipo); ipsec_in_use--; return err; } #ifdef notyet /* * Add a policy to the SPD. */ struct ipsec_policy * ipsec_add_policy(struct sockaddr_encap *dst, struct sockaddr_encap *mask, union sockaddr_union *sdst, int type, int sproto) { struct sockaddr_encap encapgw; struct ipsec_policy *ipon; if (ipsec_policy_pool_initialized == 0) { ipsec_policy_pool_initialized = 1; pool_init(&ipsec_policy_pool, sizeof(struct ipsec_policy), 0, 0, PR_FREEHEADER, "ipsec policy", 0, NULL, NULL, M_IPSEC_POLICY); } ipon = pool_get(&ipsec_policy_pool, 0); if (ipon == NULL) return NULL; bzero(ipon, sizeof(struct ipsec_policy)); bzero((caddr_t) &encapgw, sizeof(struct sockaddr_encap)); encapgw.sen_len = SENT_LEN; encapgw.sen_family = PF_KEY; encapgw.sen_type = SENT_IPSP; encapgw.sen_ipsp = ipon; if (rtrequest(RTM_ADD, (struct sockaddr *) dst, (struct sockaddr *) &encapgw, (struct sockaddr *) mask, RTF_UP | RTF_GATEWAY | RTF_STATIC, (struct rtentry **) 0) != 0) { DPRINTF(("ipsec_add_policy: failed to add policy\n")); pool_put(&ipsec_policy_pool, ipon); return NULL; } ipsec_in_use++; bcopy(dst, &ipon->ipo_addr, sizeof(struct sockaddr_encap)); bcopy(mask, &ipon->ipo_mask, sizeof(struct sockaddr_encap)); bcopy(sdst, &ipon->ipo_dst, sizeof(union sockaddr_union)); ipon->ipo_sproto = sproto; ipon->ipo_type = type; TAILQ_INSERT_HEAD(&ipsec_policy_head, ipon, ipo_list); return ipon; } #endif /* * Delete a pending IPsec acquire record. */ void ipsp_delete_acquire(void *v) { struct ipsec_acquire *ipa = v; timeout_del(&ipa->ipa_timeout); TAILQ_REMOVE(&ipsec_acquire_head, ipa, ipa_next); pool_put(&ipsec_acquire_pool, ipa); } /* * Find out if there's an ACQUIRE pending. * XXX Need a better structure. */ struct ipsec_acquire * ipsp_pending_acquire(union sockaddr_union *gw) { struct ipsec_acquire *ipa; for (ipa = TAILQ_FIRST(&ipsec_acquire_head); ipa; ipa = TAILQ_NEXT(ipa, ipa_next)) { if (!bcmp(gw, &ipa->ipa_addr, gw->sa.sa_len)) return ipa; } return NULL; } /* * Signal key management that we need an SA. If we're given an mbuf, store * it and retransmit the packet if/when we have an SA in place. */ int ipsp_acquire_sa(struct ipsec_policy *ipo, union sockaddr_union *gw, union sockaddr_union *laddr, struct sockaddr_encap *ddst, struct mbuf *m) { struct ipsec_acquire *ipa; #ifdef INET6 int i; #endif /* Check whether request has been made already. */ if ((ipa = ipsp_pending_acquire(gw)) != NULL) return 0; /* Add request in cache and proceed. */ if (ipsec_acquire_pool_initialized == 0) { ipsec_acquire_pool_initialized = 1; pool_init(&ipsec_acquire_pool, sizeof(struct ipsec_acquire), 0, 0, PR_FREEHEADER, "ipsec acquire", 0, NULL, NULL, M_IPSEC_POLICY); } ipa = pool_get(&ipsec_acquire_pool, 0); if (ipa == NULL) return ENOMEM; bzero(ipa, sizeof(struct ipsec_acquire)); bcopy(gw, &ipa->ipa_addr, sizeof(union sockaddr_union)); timeout_set(&ipa->ipa_timeout, ipsp_delete_acquire, ipa); ipa->ipa_info.sen_len = ipa->ipa_mask.sen_len = SENT_LEN; ipa->ipa_info.sen_family = ipa->ipa_mask.sen_family = PF_KEY; /* Just copy the right information. */ switch (ipo->ipo_addr.sen_type) { #ifdef INET case SENT_IP4: ipa->ipa_info.sen_type = ipa->ipa_mask.sen_type = SENT_IP4; ipa->ipa_info.sen_direction = ipo->ipo_addr.sen_direction; ipa->ipa_mask.sen_direction = ipo->ipo_mask.sen_direction; if (ipo->ipo_mask.sen_ip_src.s_addr == INADDR_ANY || ipo->ipo_addr.sen_ip_src.s_addr == INADDR_ANY || ipsp_is_unspecified(ipo->ipo_dst)) { ipa->ipa_info.sen_ip_src = ddst->sen_ip_src; ipa->ipa_mask.sen_ip_src.s_addr = INADDR_BROADCAST; } else { ipa->ipa_info.sen_ip_src = ipo->ipo_addr.sen_ip_src; ipa->ipa_mask.sen_ip_src = ipo->ipo_mask.sen_ip_src; } if (ipo->ipo_mask.sen_ip_dst.s_addr == INADDR_ANY || ipo->ipo_addr.sen_ip_dst.s_addr == INADDR_ANY || ipsp_is_unspecified(ipo->ipo_dst)) { ipa->ipa_info.sen_ip_dst = ddst->sen_ip_dst; ipa->ipa_mask.sen_ip_dst.s_addr = INADDR_BROADCAST; } else { ipa->ipa_info.sen_ip_dst = ipo->ipo_addr.sen_ip_dst; ipa->ipa_mask.sen_ip_dst = ipo->ipo_mask.sen_ip_dst; } ipa->ipa_info.sen_proto = ipo->ipo_addr.sen_proto; ipa->ipa_mask.sen_proto = ipo->ipo_mask.sen_proto; if (ipo->ipo_addr.sen_proto) { ipa->ipa_info.sen_sport = ipo->ipo_addr.sen_sport; ipa->ipa_mask.sen_sport = ipo->ipo_mask.sen_sport; ipa->ipa_info.sen_dport = ipo->ipo_addr.sen_dport; ipa->ipa_mask.sen_dport = ipo->ipo_mask.sen_dport; } break; #endif /* INET */ #ifdef INET6 case SENT_IP6: ipa->ipa_info.sen_type = ipa->ipa_mask.sen_type = SENT_IP6; ipa->ipa_info.sen_ip6_direction = ipo->ipo_addr.sen_ip6_direction; ipa->ipa_mask.sen_ip6_direction = ipo->ipo_mask.sen_ip6_direction; if (IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_mask.sen_ip6_src) || IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_addr.sen_ip6_src) || ipsp_is_unspecified(ipo->ipo_dst)) { ipa->ipa_info.sen_ip6_src = ddst->sen_ip6_src; for (i = 0; i < 16; i++) ipa->ipa_mask.sen_ip6_src.s6_addr8[i] = 0xff; } else { ipa->ipa_info.sen_ip6_src = ipo->ipo_addr.sen_ip6_src; ipa->ipa_mask.sen_ip6_src = ipo->ipo_mask.sen_ip6_src; } if (IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_mask.sen_ip6_dst) || IN6_IS_ADDR_UNSPECIFIED(&ipo->ipo_addr.sen_ip6_dst) || ipsp_is_unspecified(ipo->ipo_dst)) { ipa->ipa_info.sen_ip6_dst = ddst->sen_ip6_dst; for (i = 0; i < 16; i++) ipa->ipa_mask.sen_ip6_dst.s6_addr8[i] = 0xff; } else { ipa->ipa_info.sen_ip6_dst = ipo->ipo_addr.sen_ip6_dst; ipa->ipa_mask.sen_ip6_dst = ipo->ipo_mask.sen_ip6_dst; } ipa->ipa_info.sen_ip6_proto = ipo->ipo_addr.sen_ip6_proto; ipa->ipa_mask.sen_ip6_proto = ipo->ipo_mask.sen_ip6_proto; if (ipo->ipo_mask.sen_ip6_proto) { ipa->ipa_info.sen_ip6_sport = ipo->ipo_addr.sen_ip6_sport; ipa->ipa_mask.sen_ip6_sport = ipo->ipo_mask.sen_ip6_sport; ipa->ipa_info.sen_ip6_dport = ipo->ipo_addr.sen_ip6_dport; ipa->ipa_mask.sen_ip6_dport = ipo->ipo_mask.sen_ip6_dport; } break; #endif /* INET6 */ default: pool_put(&ipsec_acquire_pool, ipa); return 0; } timeout_add(&ipa->ipa_timeout, ipsec_expire_acquire * hz); TAILQ_INSERT_TAIL(&ipsec_acquire_head, ipa, ipa_next); /* PF_KEYv2 notification message. */ return pfkeyv2_acquire(ipo, gw, laddr, &ipa->ipa_seq, ddst); } /* * Deal with PCB security requirements. */ struct tdb * ipsp_spd_inp(struct mbuf *m, int af, int hlen, int *error, int direction, struct tdb *tdbp, struct inpcb *inp, struct ipsec_policy *ipo) { /* XXX */ if (ipo != NULL) return ipo->ipo_tdb; else return NULL; } /* * Find a pending ACQUIRE record based on its sequence number. * XXX Need to use a better data structure. */ struct ipsec_acquire * ipsec_get_acquire(u_int32_t seq) { struct ipsec_acquire *ipa; for (ipa = TAILQ_FIRST(&ipsec_acquire_head); ipa; ipa = TAILQ_NEXT(ipa, ipa_next)) if (ipa->ipa_seq == seq) return ipa; return NULL; }