/*- * Copyright (c) 2001-2007, Cisco Systems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * a) Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * b) 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. * * c) Neither the name of Cisco Systems, Inc. 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include struct sctp_epinfo sctppcbinfo; /* FIX: we don't handle multiple link local scopes */ /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ int SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b) { struct in6_addr tmp_a, tmp_b; /* use a copy of a and b */ tmp_a = *a; tmp_b = *b; in6_clearscope(&tmp_a); in6_clearscope(&tmp_b); return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b)); } void sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) { /* * We really don't need to lock this, but I will just because it * does not hurt. */ SCTP_INP_INFO_RLOCK(); spcb->ep_count = sctppcbinfo.ipi_count_ep; spcb->asoc_count = sctppcbinfo.ipi_count_asoc; spcb->laddr_count = sctppcbinfo.ipi_count_laddr; spcb->raddr_count = sctppcbinfo.ipi_count_raddr; spcb->chk_count = sctppcbinfo.ipi_count_chunk; spcb->readq_count = sctppcbinfo.ipi_count_readq; spcb->stream_oque = sctppcbinfo.ipi_count_strmoq; spcb->free_chunks = sctppcbinfo.ipi_free_chunks; SCTP_INP_INFO_RUNLOCK(); } /* * Addresses are added to VRF's (Virtual Router's). For BSD we * have only the default VRF 0. We maintain a hash list of * VRF's. Each VRF has its own list of sctp_ifn's. Each of * these has a list of addresses. When we add a new address * to a VRF we lookup the ifn/ifn_index, if the ifn does * not exist we create it and add it to the list of IFN's * within the VRF. Once we have the sctp_ifn, we add the * address to the list. So we look something like: * * hash-vrf-table * vrf-> ifn-> ifn -> ifn * vrf | * ... +--ifa-> ifa -> ifa * vrf * * We keep these seperate lists since the SCTP subsystem will * point to these from its source address selection nets structure. * When an address is deleted it does not happen right away on * the SCTP side, it gets scheduled. What we do when a * delete happens is immediately remove the address from * the master list and decrement the refcount. As our * addip iterator works through and frees the src address * selection pointing to the sctp_ifa, eventually the refcount * will reach 0 and we will delete it. Note that it is assumed * that any locking on system level ifn/ifa is done at the * caller of these functions and these routines will only * lock the SCTP structures as they add or delete things. * * Other notes on VRF concepts. * - An endpoint can be in multiple VRF's * - An association lives within a VRF and only one VRF. * - Any incoming packet we can deduce the VRF for by * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) * - Any downward send call or connect call must supply the * VRF via ancillary data or via some sort of set default * VRF socket option call (again for BSD no brainer since * the VRF is always 0). * - An endpoint may add multiple VRF's to it. * - Listening sockets can accept associations in any * of the VRF's they are in but the assoc will end up * in only one VRF (gotten from the packet or connect/send). * */ struct sctp_vrf * sctp_allocate_vrf(int vrfid) { struct sctp_vrf *vrf = NULL; struct sctp_vrflist *bucket; /* First allocate the VRF structure */ vrf = sctp_find_vrf(vrfid); if (vrf) { /* Already allocated */ return (vrf); } SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), "SCTP_VRF"); if (vrf == NULL) { /* No memory */ #ifdef INVARIANTS panic("No memory for VRF:%d", vrfid); #endif return (NULL); } /* setup the VRF */ memset(vrf, 0, sizeof(struct sctp_vrf)); vrf->vrf_id = vrfid; LIST_INIT(&vrf->ifnlist); vrf->total_ifa_count = 0; /* Init the HASH of addresses */ vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_HASH_SIZE, &vrf->vrf_hashmark); if (vrf->vrf_addr_hash == NULL) { /* No memory */ #ifdef INVARIANTS panic("No memory for VRF:%d", vrfid); #endif return (NULL); } /* Add it to the hash table */ bucket = &sctppcbinfo.sctp_vrfhash[(vrfid & sctppcbinfo.hashvrfmark)]; LIST_INSERT_HEAD(bucket, vrf, next_vrf); return (vrf); } struct sctp_ifn * sctp_find_ifn(struct sctp_vrf *vrf, void *ifn, uint32_t ifn_index) { struct sctp_ifn *sctp_ifnp; /* * We assume the lock is held for the addresses if thats wrong * problems could occur :-) */ LIST_FOREACH(sctp_ifnp, &vrf->ifnlist, next_ifn) { if (sctp_ifnp->ifn_index == ifn_index) { return (sctp_ifnp); } if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { return (sctp_ifnp); } } return (NULL); } struct sctp_vrf * sctp_find_vrf(uint32_t vrfid) { struct sctp_vrflist *bucket; struct sctp_vrf *liste; bucket = &sctppcbinfo.sctp_vrfhash[(vrfid & sctppcbinfo.hashvrfmark)]; LIST_FOREACH(liste, bucket, next_vrf) { if (vrfid == liste->vrf_id) { return (liste); } } return (NULL); } void sctp_free_ifa(struct sctp_ifa *sctp_ifap) { int ret; ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1); if (ret == 1) { /* We zero'd the count */ SCTP_FREE(sctp_ifap); } } struct sctp_ifa * sctp_add_addr_to_vrf(uint32_t vrfid, void *ifn, uint32_t ifn_index, uint32_t ifn_type, const char *if_name, void *ifa, struct sockaddr *addr, uint32_t ifa_flags) { struct sctp_vrf *vrf; struct sctp_ifn *sctp_ifnp = NULL; struct sctp_ifa *sctp_ifap = NULL; struct sctp_ifalist *hash_head; uint32_t hash_of_addr; /* How granular do we need the locks to be here? */ SCTP_IPI_ADDR_LOCK(); vrf = sctp_find_vrf(vrfid); if (vrf == NULL) { vrf = sctp_allocate_vrf(vrfid); if (vrf == NULL) { SCTP_IPI_ADDR_UNLOCK(); return (NULL); } } sctp_ifnp = sctp_find_ifn(vrf, ifn, ifn_index); if (sctp_ifnp == NULL) { /* * build one and add it, can't hold lock until after malloc * done though. */ SCTP_IPI_ADDR_UNLOCK(); SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), "SCTP_IFN"); if (sctp_ifnp == NULL) { #ifdef INVARIANTS panic("No memory for IFN:%u", sctp_ifnp->ifn_index); #endif return (NULL); } sctp_ifnp->ifn_index = ifn_index; sctp_ifnp->ifn_p = ifn; sctp_ifnp->ifn_type = ifn_type; sctp_ifnp->ifa_count = 0; sctp_ifnp->refcount = 0; sctp_ifnp->vrf = vrf; memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); LIST_INIT(&sctp_ifnp->ifalist); SCTP_IPI_ADDR_LOCK(); LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); } sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); if (sctp_ifap) { /* Hmm, it already exists? */ if ((sctp_ifap->ifn_p) && (sctp_ifap->ifn_p->ifn_index == ifn_index)) { if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { /* easy to solve, just switch back to active */ sctp_ifap->localifa_flags = SCTP_ADDR_VALID; sctp_ifap->ifn_p = sctp_ifnp; exit_stage_left: SCTP_IPI_ADDR_UNLOCK(); return (sctp_ifap); } else { goto exit_stage_left; } } else { if (sctp_ifap->ifn_p) { /* * The first IFN gets the address, * duplicates are ignored. */ goto exit_stage_left; } else { /* repair ifnp which was NULL ? */ sctp_ifap->localifa_flags = SCTP_ADDR_VALID; sctp_ifap->ifn_p = sctp_ifnp; atomic_add_int(&sctp_ifnp->refcount, 1); } goto exit_stage_left; } } SCTP_IPI_ADDR_UNLOCK(); SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), "SCTP_IFA"); if (sctp_ifap == NULL) { #ifdef INVARIANTS panic("No memory for IFA"); #endif return (NULL); } memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); sctp_ifap->ifn_p = sctp_ifnp; atomic_add_int(&sctp_ifnp->refcount, 1); sctp_ifap->ifa = ifa; memcpy(&sctp_ifap->address, addr, addr->sa_len); sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; sctp_ifap->flags = ifa_flags; /* Set scope */ if (sctp_ifap->address.sa.sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)&sctp_ifap->address.sin; if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { sctp_ifap->src_is_loop = 1; } if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { sctp_ifap->src_is_priv = 1; } } else if (sctp_ifap->address.sa.sa_family == AF_INET6) { /* ok to use deprecated addresses? */ struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { sctp_ifap->src_is_loop = 1; } if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { sctp_ifap->src_is_priv = 1; } } hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); if ((sctp_ifap->src_is_priv == 0) && (sctp_ifap->src_is_loop == 0)) { sctp_ifap->src_is_glob = 1; } SCTP_IPI_ADDR_LOCK(); hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_hashmark)]; LIST_INSERT_HEAD(hash_head, sctp_ifap, next_bucket); sctp_ifap->refcount = 1; LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); sctp_ifnp->ifa_count++; vrf->total_ifa_count++; SCTP_IPI_ADDR_UNLOCK(); return (sctp_ifap); } struct sctp_ifa * sctp_del_addr_from_vrf(uint32_t vrfid, struct sockaddr *addr, uint32_t ifn_index) { struct sctp_vrf *vrf; struct sctp_ifa *sctp_ifap = NULL; struct sctp_ifn *sctp_ifnp = NULL; SCTP_IPI_ADDR_LOCK(); vrf = sctp_find_vrf(vrfid); if (vrf == NULL) { printf("Can't find vrfid:%d\n", vrfid); goto out_now; } sctp_ifnp = sctp_find_ifn(vrf, (void *)NULL, ifn_index); if (sctp_ifnp == NULL) { sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); } else { sctp_ifap = sctp_find_ifa_in_ifn(sctp_ifnp, addr, 1); } if (sctp_ifap) { sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; sctp_ifnp->ifa_count--; vrf->total_ifa_count--; LIST_REMOVE(sctp_ifap, next_bucket); LIST_REMOVE(sctp_ifap, next_ifa); atomic_add_int(&sctp_ifnp->refcount, -1); } else { printf("Del Addr-ifn:%d Could not find address:", ifn_index); sctp_print_address(addr); } out_now: SCTP_IPI_ADDR_UNLOCK(); return (sctp_ifap); } /* * Notes on locks for FreeBSD 5 and up. All association lookups that have a * definte ep, the INP structure is assumed to be locked for reading. If we * need to go find the INP (ususally when a **inp is passed) then we must * lock the INFO structure first and if needed lock the INP too. Note that if * we lock it we must * */ /* * Given a endpoint, look and find in its association list any association * with the "to" address given. This can be a "from" address, too, for * inbound packets. For outbound packets it is a true "to" address. */ static struct sctp_tcb * sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, struct sockaddr *to, struct sctp_nets **netp) { /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */ /* * Note for this module care must be taken when observing what to is * for. In most of the rest of the code the TO field represents my * peer and the FROM field represents my address. For this module it * is reversed of that. */ /* * If we support the TCP model, then we must now dig through to see * if we can find our endpoint in the list of tcp ep's. */ uint16_t lport, rport; struct sctppcbhead *ephead; struct sctp_inpcb *inp; struct sctp_laddr *laddr; struct sctp_tcb *stcb; struct sctp_nets *net; if ((to == NULL) || (from == NULL)) { return (NULL); } if (to->sa_family == AF_INET && from->sa_family == AF_INET) { lport = ((struct sockaddr_in *)to)->sin_port; rport = ((struct sockaddr_in *)from)->sin_port; } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { lport = ((struct sockaddr_in6 *)to)->sin6_port; rport = ((struct sockaddr_in6 *)from)->sin6_port; } else { return NULL; } ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR( (lport + rport), sctppcbinfo.hashtcpmark)]; /* * Ok now for each of the guys in this bucket we must look and see: * - Does the remote port match. - Does there single association's * addresses match this address (to). If so we update p_ep to point * to this ep and return the tcb from it. */ LIST_FOREACH(inp, ephead, sctp_hash) { if (lport != inp->sctp_lport) { continue; } SCTP_INP_RLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(inp); continue; } /* check to see if the ep has one of the addresses */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { /* We are NOT bound all, so look further */ int match = 0; LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("An ounce of prevention is worth a pound of cure\n"); } #endif continue; } if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("ifa being deleted\n"); } #endif continue; } if (laddr->ifa->address.sa.sa_family == to->sa_family) { /* see if it matches */ struct sockaddr_in *intf_addr, *sin; intf_addr = &laddr->ifa->address.sin; sin = (struct sockaddr_in *)to; if (from->sa_family == AF_INET) { if (sin->sin_addr.s_addr == intf_addr->sin_addr.s_addr) { match = 1; break; } } else { struct sockaddr_in6 *intf_addr6; struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *) to; intf_addr6 = &laddr->ifa->address.sin6; if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &intf_addr6->sin6_addr)) { match = 1; break; } } } } if (match == 0) { /* This endpoint does not have this address */ SCTP_INP_RUNLOCK(inp); continue; } } /* * Ok if we hit here the ep has the address, does it hold * the tcb? */ stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { SCTP_INP_RUNLOCK(inp); continue; } SCTP_TCB_LOCK(stcb); if (stcb->rport != rport) { /* remote port does not match. */ SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); continue; } /* Does this TCB have a matching address? */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (net->ro._l_addr.sa.sa_family != from->sa_family) { /* not the same family, can't be a match */ continue; } if (from->sa_family == AF_INET) { struct sockaddr_in *sin, *rsin; sin = (struct sockaddr_in *)&net->ro._l_addr; rsin = (struct sockaddr_in *)from; if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { /* found it */ if (netp != NULL) { *netp = net; } /* Update the endpoint pointer */ *inp_p = inp; SCTP_INP_RUNLOCK(inp); return (stcb); } } else { struct sockaddr_in6 *sin6, *rsin6; sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; rsin6 = (struct sockaddr_in6 *)from; if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &rsin6->sin6_addr)) { /* found it */ if (netp != NULL) { *netp = net; } /* Update the endpoint pointer */ *inp_p = inp; SCTP_INP_RUNLOCK(inp); return (stcb); } } } SCTP_TCB_UNLOCK(stcb); SCTP_INP_RUNLOCK(inp); } return (NULL); } /* * rules for use * * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an * stcb, both will be locked (locked_tcb and stcb) but decrement will be done * (if locked == NULL). 3) Decrement happens on return ONLY if locked == * NULL. */ struct sctp_tcb * sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) { struct sctpasochead *head; struct sctp_inpcb *inp; struct sctp_tcb *stcb; struct sctp_nets *net; uint16_t rport; inp = *inp_p; if (remote->sa_family == AF_INET) { rport = (((struct sockaddr_in *)remote)->sin_port); } else if (remote->sa_family == AF_INET6) { rport = (((struct sockaddr_in6 *)remote)->sin6_port); } else { return (NULL); } if (locked_tcb) { /* * UN-lock so we can do proper locking here this occurs when * called from load_addresses_from_init. */ SCTP_TCB_UNLOCK(locked_tcb); } SCTP_INP_INFO_RLOCK(); if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { /* * Now either this guy is our listener or it's the * connector. If it is the one that issued the connect, then * it's only chance is to be the first TCB in the list. If * it is the acceptor, then do the special_lookup to hash * and find the real inp. */ if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { /* to is peer addr, from is my addr */ stcb = sctp_tcb_special_locate(inp_p, remote, local, netp); if ((stcb != NULL) && (locked_tcb == NULL)) { /* we have a locked tcb, lower refcount */ SCTP_INP_WLOCK(inp); SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); } if ((locked_tcb != NULL) && (locked_tcb != stcb)) { SCTP_INP_RLOCK(locked_tcb->sctp_ep); SCTP_TCB_LOCK(locked_tcb); SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); } SCTP_INP_INFO_RUNLOCK(); return (stcb); } else { SCTP_INP_WLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { goto null_return; } stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { goto null_return; } SCTP_TCB_LOCK(stcb); if (stcb->rport != rport) { /* remote port does not match. */ SCTP_TCB_UNLOCK(stcb); goto null_return; } /* now look at the list of remote addresses */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { #ifdef INVARIANTS if (net == (TAILQ_NEXT(net, sctp_next))) { panic("Corrupt net list"); } #endif if (net->ro._l_addr.sa.sa_family != remote->sa_family) { /* not the same family */ continue; } if (remote->sa_family == AF_INET) { struct sockaddr_in *sin, *rsin; sin = (struct sockaddr_in *) &net->ro._l_addr; rsin = (struct sockaddr_in *)remote; if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { /* found it */ if (netp != NULL) { *netp = net; } if (locked_tcb == NULL) { SCTP_INP_DECR_REF(inp); } else if (locked_tcb != stcb) { SCTP_TCB_LOCK(locked_tcb); } SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); return (stcb); } } else if (remote->sa_family == AF_INET6) { struct sockaddr_in6 *sin6, *rsin6; sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; rsin6 = (struct sockaddr_in6 *)remote; if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &rsin6->sin6_addr)) { /* found it */ if (netp != NULL) { *netp = net; } if (locked_tcb == NULL) { SCTP_INP_DECR_REF(inp); } else if (locked_tcb != stcb) { SCTP_TCB_LOCK(locked_tcb); } SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); return (stcb); } } } SCTP_TCB_UNLOCK(stcb); } } else { SCTP_INP_WLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { goto null_return; } head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, inp->sctp_hashmark)]; if (head == NULL) { goto null_return; } LIST_FOREACH(stcb, head, sctp_tcbhash) { if (stcb->rport != rport) { /* remote port does not match */ continue; } /* now look at the list of remote addresses */ SCTP_TCB_LOCK(stcb); TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { #ifdef INVARIANTS if (net == (TAILQ_NEXT(net, sctp_next))) { panic("Corrupt net list"); } #endif if (net->ro._l_addr.sa.sa_family != remote->sa_family) { /* not the same family */ continue; } if (remote->sa_family == AF_INET) { struct sockaddr_in *sin, *rsin; sin = (struct sockaddr_in *) &net->ro._l_addr; rsin = (struct sockaddr_in *)remote; if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { /* found it */ if (netp != NULL) { *netp = net; } if (locked_tcb == NULL) { SCTP_INP_DECR_REF(inp); } else if (locked_tcb != stcb) { SCTP_TCB_LOCK(locked_tcb); } SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); return (stcb); } } else if (remote->sa_family == AF_INET6) { struct sockaddr_in6 *sin6, *rsin6; sin6 = (struct sockaddr_in6 *) &net->ro._l_addr; rsin6 = (struct sockaddr_in6 *)remote; if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &rsin6->sin6_addr)) { /* found it */ if (netp != NULL) { *netp = net; } if (locked_tcb == NULL) { SCTP_INP_DECR_REF(inp); } else if (locked_tcb != stcb) { SCTP_TCB_LOCK(locked_tcb); } SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); return (stcb); } } } SCTP_TCB_UNLOCK(stcb); } } null_return: /* clean up for returning null */ if (locked_tcb) { SCTP_TCB_LOCK(locked_tcb); } SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_RUNLOCK(); /* not found */ return (NULL); } /* * Find an association for a specific endpoint using the association id given * out in the COMM_UP notification */ struct sctp_tcb * sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) { /* * Use my the assoc_id to find a endpoint */ struct sctpasochead *head; struct sctp_tcb *stcb; uint32_t id; if (asoc_id == 0 || inp == NULL) { return (NULL); } SCTP_INP_INFO_RLOCK(); id = (uint32_t) asoc_id; head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashasocmark)]; if (head == NULL) { /* invalid id TSNH */ SCTP_INP_INFO_RUNLOCK(); return (NULL); } LIST_FOREACH(stcb, head, sctp_asocs) { SCTP_INP_RLOCK(stcb->sctp_ep); if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(stcb->sctp_ep); SCTP_INP_INFO_RUNLOCK(); return (NULL); } if (stcb->asoc.assoc_id == id) { /* candidate */ if (inp != stcb->sctp_ep) { /* * some other guy has the same id active (id * collision ??). */ SCTP_INP_RUNLOCK(stcb->sctp_ep); continue; } if (want_lock) { SCTP_TCB_LOCK(stcb); } SCTP_INP_RUNLOCK(stcb->sctp_ep); SCTP_INP_INFO_RUNLOCK(); return (stcb); } SCTP_INP_RUNLOCK(stcb->sctp_ep); } /* Ok if we missed here, lets try the restart hash */ head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)]; if (head == NULL) { /* invalid id TSNH */ SCTP_INP_INFO_RUNLOCK(); return (NULL); } LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { SCTP_INP_RLOCK(stcb->sctp_ep); if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(stcb->sctp_ep); SCTP_INP_INFO_RUNLOCK(); return (NULL); } SCTP_TCB_LOCK(stcb); SCTP_INP_RUNLOCK(stcb->sctp_ep); if (stcb->asoc.assoc_id == id) { /* candidate */ if (inp != stcb->sctp_ep) { /* * some other guy has the same id active (id * collision ??). */ SCTP_TCB_UNLOCK(stcb); continue; } SCTP_INP_INFO_RUNLOCK(); return (stcb); } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_INFO_RUNLOCK(); return (NULL); } static struct sctp_inpcb * sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, uint16_t lport, uint32_t vrf_id) { struct sctp_inpcb *inp; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; struct sctp_laddr *laddr; int fnd; /* * Endpoing probe expects that the INP_INFO is locked. */ if (nam->sa_family == AF_INET) { sin = (struct sockaddr_in *)nam; sin6 = NULL; } else if (nam->sa_family == AF_INET6) { sin6 = (struct sockaddr_in6 *)nam; sin = NULL; } else { /* unsupported family */ return (NULL); } if (head == NULL) return (NULL); LIST_FOREACH(inp, head, sctp_hash) { SCTP_INP_RLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(inp); continue; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && (inp->sctp_lport == lport)) { /* got it */ if ((nam->sa_family == AF_INET) && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && SCTP_IPV6_V6ONLY(inp)) { /* IPv4 on a IPv6 socket with ONLY IPv6 set */ SCTP_INP_RUNLOCK(inp); continue; } /* A V6 address and the endpoint is NOT bound V6 */ if (nam->sa_family == AF_INET6 && (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { SCTP_INP_RUNLOCK(inp); continue; } /* does a VRF id match? */ fnd = 0; if (inp->def_vrf_id == vrf_id) fnd = 1; SCTP_INP_RUNLOCK(inp); if (!fnd) continue; return (inp); } SCTP_INP_RUNLOCK(inp); } if ((nam->sa_family == AF_INET) && (sin->sin_addr.s_addr == INADDR_ANY)) { /* Can't hunt for one that has no address specified */ return (NULL); } else if ((nam->sa_family == AF_INET6) && (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { /* Can't hunt for one that has no address specified */ return (NULL); } /* * ok, not bound to all so see if we can find a EP bound to this * address. */ LIST_FOREACH(inp, head, sctp_hash) { SCTP_INP_RLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(inp); continue; } if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { SCTP_INP_RUNLOCK(inp); continue; } /* * Ok this could be a likely candidate, look at all of its * addresses */ if (inp->sctp_lport != lport) { SCTP_INP_RUNLOCK(inp); continue; } /* does a VRF id match? */ fnd = 0; if (inp->def_vrf_id == vrf_id) fnd = 1; if (!fnd) { SCTP_INP_RUNLOCK(inp); continue; } LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("An ounce of prevention is worth a pound of cure\n"); } #endif continue; } #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Ok laddr->ifa:%p is possible, ", laddr->ifa); } #endif if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Huh IFA being deleted\n"); } #endif continue; } if (laddr->ifa->address.sa.sa_family == nam->sa_family) { /* possible, see if it matches */ struct sockaddr_in *intf_addr; intf_addr = &laddr->ifa->address.sin; if (nam->sa_family == AF_INET) { if (sin->sin_addr.s_addr == intf_addr->sin_addr.s_addr) { SCTP_INP_RUNLOCK(inp); return (inp); } } else if (nam->sa_family == AF_INET6) { struct sockaddr_in6 *intf_addr6; intf_addr6 = &laddr->ifa->address.sin6; if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &intf_addr6->sin6_addr)) { SCTP_INP_RUNLOCK(inp); return (inp); } } } } SCTP_INP_RUNLOCK(inp); } return (NULL); } struct sctp_inpcb * sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, uint32_t vrf_id) { /* * First we check the hash table to see if someone has this port * bound with just the port. */ struct sctp_inpcb *inp; struct sctppcbhead *head; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; int lport; if (nam->sa_family == AF_INET) { sin = (struct sockaddr_in *)nam; lport = ((struct sockaddr_in *)nam)->sin_port; } else if (nam->sa_family == AF_INET6) { sin6 = (struct sockaddr_in6 *)nam; lport = ((struct sockaddr_in6 *)nam)->sin6_port; } else { /* unsupported family */ return (NULL); } /* * I could cheat here and just cast to one of the types but we will * do it right. It also provides the check against an Unsupported * type too. */ /* Find the head of the ALLADDR chain */ if (have_lock == 0) { SCTP_INP_INFO_RLOCK(); } head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, sctppcbinfo.hashmark)]; inp = sctp_endpoint_probe(nam, head, lport, vrf_id); /* * If the TCP model exists it could be that the main listening * endpoint is gone but there exists a connected socket for this guy * yet. If so we can return the first one that we find. This may NOT * be the correct one but the sctp_findassociation_ep_addr has * further code to look at all TCP models. */ if (inp == NULL && find_tcp_pool) { unsigned int i; for (i = 0; i < sctppcbinfo.hashtblsize; i++) { /* * This is real gross, but we do NOT have a remote * port at this point depending on who is calling. * We must therefore look for ANY one that matches * our local port :/ */ head = &sctppcbinfo.sctp_tcpephash[i]; if (LIST_FIRST(head)) { inp = sctp_endpoint_probe(nam, head, lport, vrf_id); if (inp) { /* Found one */ break; } } } } if (inp) { SCTP_INP_INCR_REF(inp); } if (have_lock == 0) { SCTP_INP_INFO_RUNLOCK(); } return (inp); } /* * Find an association for an endpoint with the pointer to whom you want to * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may * need to change the *to to some other struct like a mbuf... */ struct sctp_tcb * sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, uint32_t vrf_id) { struct sctp_inpcb *inp; struct sctp_tcb *retval; SCTP_INP_INFO_RLOCK(); if (find_tcp_pool) { if (inp_p != NULL) { retval = sctp_tcb_special_locate(inp_p, from, to, netp); } else { retval = sctp_tcb_special_locate(&inp, from, to, netp); } if (retval != NULL) { SCTP_INP_INFO_RUNLOCK(); return (retval); } } inp = sctp_pcb_findep(to, 0, 1, vrf_id); if (inp_p != NULL) { *inp_p = inp; } SCTP_INP_INFO_RUNLOCK(); if (inp == NULL) { return (NULL); } /* * ok, we have an endpoint, now lets find the assoc for it (if any) * we now place the source address or from in the to of the find * endpoint call. Since in reality this chain is used from the * inbound packet side. */ if (inp_p != NULL) { retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL); } else { retval = sctp_findassociation_ep_addr(&inp, from, netp, to, NULL); } return retval; } /* * This routine will grub through the mbuf that is a INIT or INIT-ACK and * find all addresses that the sender has specified in any address list. Each * address will be used to lookup the TCB and see if one exits. */ static struct sctp_tcb * sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, struct sockaddr *dest) { struct sockaddr_in sin4; struct sockaddr_in6 sin6; struct sctp_paramhdr *phdr, parm_buf; struct sctp_tcb *retval; uint32_t ptype, plen; memset(&sin4, 0, sizeof(sin4)); memset(&sin6, 0, sizeof(sin6)); sin4.sin_len = sizeof(sin4); sin4.sin_family = AF_INET; sin4.sin_port = sh->src_port; sin6.sin6_len = sizeof(sin6); sin6.sin6_family = AF_INET6; sin6.sin6_port = sh->src_port; retval = NULL; offset += sizeof(struct sctp_init_chunk); phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); while (phdr != NULL) { /* now we must see if we want the parameter */ ptype = ntohs(phdr->param_type); plen = ntohs(phdr->param_length); if (plen == 0) { break; } if (ptype == SCTP_IPV4_ADDRESS && plen == sizeof(struct sctp_ipv4addr_param)) { /* Get the rest of the address */ struct sctp_ipv4addr_param ip4_parm, *p4; phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&ip4_parm, plen); if (phdr == NULL) { return (NULL); } p4 = (struct sctp_ipv4addr_param *)phdr; memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); /* look it up */ retval = sctp_findassociation_ep_addr(inp_p, (struct sockaddr *)&sin4, netp, dest, NULL); if (retval != NULL) { return (retval); } } else if (ptype == SCTP_IPV6_ADDRESS && plen == sizeof(struct sctp_ipv6addr_param)) { /* Get the rest of the address */ struct sctp_ipv6addr_param ip6_parm, *p6; phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&ip6_parm, plen); if (phdr == NULL) { return (NULL); } p6 = (struct sctp_ipv6addr_param *)phdr; memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); /* look it up */ retval = sctp_findassociation_ep_addr(inp_p, (struct sockaddr *)&sin6, netp, dest, NULL); if (retval != NULL) { return (retval); } } offset += SCTP_SIZE32(plen); phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); } return (NULL); } static struct sctp_tcb * sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, uint16_t lport, int skip_src_check) { /* * Use my vtag to hash. If we find it we then verify the source addr * is in the assoc. If all goes well we save a bit on rec of a * packet. */ struct sctpasochead *head; struct sctp_nets *net; struct sctp_tcb *stcb; *netp = NULL; *inp_p = NULL; SCTP_INP_INFO_RLOCK(); head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag, sctppcbinfo.hashasocmark)]; if (head == NULL) { /* invalid vtag */ SCTP_INP_INFO_RUNLOCK(); return (NULL); } LIST_FOREACH(stcb, head, sctp_asocs) { SCTP_INP_RLOCK(stcb->sctp_ep); if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { SCTP_INP_RUNLOCK(stcb->sctp_ep); SCTP_INP_INFO_RUNLOCK(); return (NULL); } SCTP_TCB_LOCK(stcb); SCTP_INP_RUNLOCK(stcb->sctp_ep); if (stcb->asoc.my_vtag == vtag) { /* candidate */ if (stcb->rport != rport) { /* * we could remove this if vtags are unique * across the system. */ SCTP_TCB_UNLOCK(stcb); continue; } if (stcb->sctp_ep->sctp_lport != lport) { /* * we could remove this if vtags are unique * across the system. */ SCTP_TCB_UNLOCK(stcb); continue; } if (skip_src_check) { *netp = NULL; /* unknown */ *inp_p = stcb->sctp_ep; SCTP_INP_INFO_RUNLOCK(); return (stcb); } net = sctp_findnet(stcb, from); if (net) { /* yep its him. */ *netp = net; SCTP_STAT_INCR(sctps_vtagexpress); *inp_p = stcb->sctp_ep; SCTP_INP_INFO_RUNLOCK(); return (stcb); } else { /* * not him, this should only happen in rare * cases so I peg it. */ SCTP_STAT_INCR(sctps_vtagbogus); } } SCTP_TCB_UNLOCK(stcb); } SCTP_INP_INFO_RUNLOCK(); return (NULL); } /* * Find an association with the pointer to the inbound IP packet. This can be * a IPv4 or IPv6 packet. */ struct sctp_tcb * sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb **inp_p, struct sctp_nets **netp) { int find_tcp_pool; struct ip *iph; struct sctp_tcb *retval; struct sockaddr_storage to_store, from_store; struct sockaddr *to = (struct sockaddr *)&to_store; struct sockaddr *from = (struct sockaddr *)&from_store; struct sctp_inpcb *inp; uint32_t vrf_id; vrf_id = SCTP_DEFAULT_VRFID; iph = mtod(m, struct ip *); if (iph->ip_v == IPVERSION) { /* its IPv4 */ struct sockaddr_in *from4; from4 = (struct sockaddr_in *)&from_store; bzero(from4, sizeof(*from4)); from4->sin_family = AF_INET; from4->sin_len = sizeof(struct sockaddr_in); from4->sin_addr.s_addr = iph->ip_src.s_addr; from4->sin_port = sh->src_port; } else if (iph->ip_v == (IPV6_VERSION >> 4)) { /* its IPv6 */ struct ip6_hdr *ip6; struct sockaddr_in6 *from6; ip6 = mtod(m, struct ip6_hdr *); from6 = (struct sockaddr_in6 *)&from_store; bzero(from6, sizeof(*from6)); from6->sin6_family = AF_INET6; from6->sin6_len = sizeof(struct sockaddr_in6); from6->sin6_addr = ip6->ip6_src; from6->sin6_port = sh->src_port; /* Get the scopes in properly to the sin6 addr's */ /* we probably don't need these operations */ (void)sa6_recoverscope(from6); sa6_embedscope(from6, ip6_use_defzone); } else { /* Currently not supported. */ return (NULL); } if (sh->v_tag) { /* we only go down this path if vtag is non-zero */ retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), inp_p, netp, sh->src_port, sh->dest_port, 0); if (retval) { return (retval); } } if (iph->ip_v == IPVERSION) { /* its IPv4 */ struct sockaddr_in *to4; to4 = (struct sockaddr_in *)&to_store; bzero(to4, sizeof(*to4)); to4->sin_family = AF_INET; to4->sin_len = sizeof(struct sockaddr_in); to4->sin_addr.s_addr = iph->ip_dst.s_addr; to4->sin_port = sh->dest_port; } else if (iph->ip_v == (IPV6_VERSION >> 4)) { /* its IPv6 */ struct ip6_hdr *ip6; struct sockaddr_in6 *to6; ip6 = mtod(m, struct ip6_hdr *); to6 = (struct sockaddr_in6 *)&to_store; bzero(to6, sizeof(*to6)); to6->sin6_family = AF_INET6; to6->sin6_len = sizeof(struct sockaddr_in6); to6->sin6_addr = ip6->ip6_dst; to6->sin6_port = sh->dest_port; /* Get the scopes in properly to the sin6 addr's */ /* we probably don't need these operations */ (void)sa6_recoverscope(to6); sa6_embedscope(to6, ip6_use_defzone); } find_tcp_pool = 0; /* * FIX FIX?, I think we only need to look in the TCP pool if its an * INIT or COOKIE-ECHO, We really don't need to find it that way if * its a INIT-ACK or COOKIE_ACK since these in bot one-2-one and * one-2-N would be in the main pool anyway. */ if ((ch->chunk_type != SCTP_INITIATION) && (ch->chunk_type != SCTP_INITIATION_ACK) && (ch->chunk_type != SCTP_COOKIE_ACK) && (ch->chunk_type != SCTP_COOKIE_ECHO)) { /* Other chunk types go to the tcp pool. */ find_tcp_pool = 1; } if (inp_p) { retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, find_tcp_pool, vrf_id); inp = *inp_p; } else { retval = sctp_findassociation_addr_sa(to, from, &inp, netp, find_tcp_pool, vrf_id); } #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("retval:%p inp:%p\n", retval, inp); } #endif if (retval == NULL && inp) { /* Found a EP but not this address */ if ((ch->chunk_type == SCTP_INITIATION) || (ch->chunk_type == SCTP_INITIATION_ACK)) { /* * special hook, we do NOT return linp or an * association that is linked to an existing * association that is under the TCP pool (i.e. no * listener exists). The endpoint finding routine * will always find a listner before examining the * TCP pool. */ if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { if (inp_p) { *inp_p = NULL; } return (NULL); } retval = sctp_findassociation_special_addr(m, iphlen, offset, sh, &inp, netp, to); if (inp_p != NULL) { *inp_p = inp; } } } #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("retval is %p\n", retval); } #endif return (retval); } /* * lookup an association by an ASCONF lookup address. * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup */ struct sctp_tcb * sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) { struct sctp_tcb *stcb; struct sockaddr_in *sin; struct sockaddr_in6 *sin6; struct sockaddr_storage local_store, remote_store; struct ip *iph; struct sctp_paramhdr parm_buf, *phdr; int ptype; int zero_address = 0; memset(&local_store, 0, sizeof(local_store)); memset(&remote_store, 0, sizeof(remote_store)); /* First get the destination address setup too. */ iph = mtod(m, struct ip *); if (iph->ip_v == IPVERSION) { /* its IPv4 */ sin = (struct sockaddr_in *)&local_store; sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); sin->sin_port = sh->dest_port; sin->sin_addr.s_addr = iph->ip_dst.s_addr; } else if (iph->ip_v == (IPV6_VERSION >> 4)) { /* its IPv6 */ struct ip6_hdr *ip6; ip6 = mtod(m, struct ip6_hdr *); sin6 = (struct sockaddr_in6 *)&local_store; sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); sin6->sin6_port = sh->dest_port; sin6->sin6_addr = ip6->ip6_dst; } else { return NULL; } phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), &parm_buf, sizeof(struct sctp_paramhdr)); if (phdr == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT3) { printf("findassociation_ep_asconf: failed to get asconf lookup addr\n"); } #endif /* SCTP_DEBUG */ return NULL; } ptype = (int)((uint32_t) ntohs(phdr->param_type)); /* get the correlation address */ if (ptype == SCTP_IPV6_ADDRESS) { /* ipv6 address param */ struct sctp_ipv6addr_param *p6, p6_buf; if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { return NULL; } p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), &p6_buf.ph, sizeof(*p6)); if (p6 == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT3) { printf("findassociation_ep_asconf: failed to get asconf v6 lookup addr\n"); } #endif /* SCTP_DEBUG */ return (NULL); } sin6 = (struct sockaddr_in6 *)&remote_store; sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(*sin6); sin6->sin6_port = sh->src_port; memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) zero_address = 1; } else if (ptype == SCTP_IPV4_ADDRESS) { /* ipv4 address param */ struct sctp_ipv4addr_param *p4, p4_buf; if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { return NULL; } p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), &p4_buf.ph, sizeof(*p4)); if (p4 == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_INPUT3) { printf("findassociation_ep_asconf: failed to get asconf v4 lookup addr\n"); } #endif /* SCTP_DEBUG */ return (NULL); } sin = (struct sockaddr_in *)&remote_store; sin->sin_family = AF_INET; sin->sin_len = sizeof(*sin); sin->sin_port = sh->src_port; memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); if (sin->sin_addr.s_addr == INADDR_ANY) zero_address = 1; } else { /* invalid address param type */ return NULL; } if (zero_address) { stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, netp, sh->src_port, sh->dest_port, 1); /* * printf("findassociation_ep_asconf: zero lookup address * finds stcb 0x%x\n", (uint32_t)stcb); */ } else { stcb = sctp_findassociation_ep_addr(inp_p, (struct sockaddr *)&remote_store, netp, (struct sockaddr *)&local_store, NULL); } return (stcb); } /* * allocate a sctp_inpcb and setup a temporary binding to a port/all * addresses. This way if we don't get a bind we by default pick a ephemeral * port with all addresses bound. */ int sctp_inpcb_alloc(struct socket *so) { /* * we get called when a new endpoint starts up. We need to allocate * the sctp_inpcb structure from the zone and init it. Mark it as * unbound and find a port that we can use as an ephemeral with * INADDR_ANY. If the user binds later no problem we can then add in * the specific addresses. And setup the default parameters for the * EP. */ int i, error; struct sctp_inpcb *inp; struct sctp_pcb *m; struct timeval time; sctp_sharedkey_t *null_key; error = 0; SCTP_INP_INFO_WLOCK(); inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); if (inp == NULL) { printf("Out of SCTP-INPCB structures - no resources\n"); SCTP_INP_INFO_WUNLOCK(); return (ENOBUFS); } /* zap it */ bzero(inp, sizeof(*inp)); /* bump generations */ /* setup socket pointers */ inp->sctp_socket = so; inp->ip_inp.inp.inp_socket = so; inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; #ifdef IPSEC { struct inpcbpolicy *pcb_sp = NULL; error = ipsec_init_pcbpolicy(so, &pcb_sp); /* Arrange to share the policy */ inp->ip_inp.inp.inp_sp = pcb_sp; ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; } if (error != 0) { SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); SCTP_INP_INFO_WUNLOCK(); return error; } #endif /* IPSEC */ SCTP_INCR_EP_COUNT(); inp->ip_inp.inp.inp_ip_ttl = ip_defttl; SCTP_INP_INFO_WUNLOCK(); so->so_pcb = (caddr_t)inp; if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { /* UDP style socket */ inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | SCTP_PCB_FLAGS_UNBOUND); sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT); /* Be sure it is NON-BLOCKING IO for UDP */ /* SCTP_SET_SO_NBIO(so); */ } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { /* TCP style socket */ inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | SCTP_PCB_FLAGS_UNBOUND); sctp_feature_on(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT); /* Be sure we have blocking IO by default */ SCTP_CLEAR_SO_NBIO(so); } else { /* * unsupported socket type (RAW, etc)- in case we missed it * in protosw */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); return (EOPNOTSUPP); } inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, &inp->sctp_hashmark); if (inp->sctp_tcbhash == NULL) { printf("Out of SCTP-INPCB->hashinit - no resources\n"); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); return (ENOBUFS); } inp->def_vrf_id = SCTP_DEFAULT_VRFID; SCTP_INP_INFO_WLOCK(); SCTP_INP_LOCK_INIT(inp); SCTP_INP_READ_INIT(inp); SCTP_ASOC_CREATE_LOCK_INIT(inp); /* lock the new ep */ SCTP_INP_WLOCK(inp); /* add it to the info area */ LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); SCTP_INP_INFO_WUNLOCK(); TAILQ_INIT(&inp->read_queue); LIST_INIT(&inp->sctp_addr_list); LIST_INIT(&inp->sctp_asoc_list); #ifdef SCTP_TRACK_FREED_ASOCS /* TEMP CODE */ LIST_INIT(&inp->sctp_asoc_free_list); #endif /* Init the timer structure for signature change */ SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; /* now init the actual endpoint default data */ m = &inp->sctp_ep; /* setup the base timeout information */ m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); /* all max/min max are in ms */ m->sctp_maxrto = sctp_rto_max_default; m->sctp_minrto = sctp_rto_min_default; m->initial_rto = sctp_rto_initial_default; m->initial_init_rto_max = sctp_init_rto_max_default; m->sctp_sack_freq = sctp_sack_freq_default; m->max_open_streams_intome = MAX_SCTP_STREAMS; m->max_init_times = sctp_init_rtx_max_default; m->max_send_times = sctp_assoc_rtx_max_default; m->def_net_failure = sctp_path_rtx_max_default; m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; m->max_burst = sctp_max_burst_default; /* number of streams to pre-open on a association */ m->pre_open_stream_count = sctp_nr_outgoing_streams_default; /* Add adaptation cookie */ m->adaptation_layer_indicator = 0x504C5253; /* seed random number generator */ m->random_counter = 1; m->store_at = SCTP_SIGNATURE_SIZE; SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); sctp_fill_random_store(m); /* Minimum cookie size */ m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + sizeof(struct sctp_state_cookie); m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; /* Setup the initial secret */ SCTP_GETTIME_TIMEVAL(&time); m->time_of_secret_change = time.tv_sec; for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { m->secret_key[0][i] = sctp_select_initial_TSN(m); } sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); /* How long is a cookie good for ? */ m->def_cookie_life = sctp_valid_cookie_life_default; /* * Initialize authentication parameters */ m->local_hmacs = sctp_default_supported_hmaclist(); m->local_auth_chunks = sctp_alloc_chunklist(); sctp_auth_set_default_chunks(m->local_auth_chunks); LIST_INIT(&m->shared_keys); /* add default NULL key as key id 0 */ null_key = sctp_alloc_sharedkey(); sctp_insert_sharedkey(&m->shared_keys, null_key); SCTP_INP_WUNLOCK(inp); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 12); #endif return (error); } void sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, struct sctp_tcb *stcb) { struct sctp_nets *net; uint16_t lport, rport; struct sctppcbhead *head; struct sctp_laddr *laddr, *oladdr; SCTP_TCB_UNLOCK(stcb); SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(old_inp); SCTP_INP_WLOCK(new_inp); SCTP_TCB_LOCK(stcb); new_inp->sctp_ep.time_of_secret_change = old_inp->sctp_ep.time_of_secret_change; memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, sizeof(old_inp->sctp_ep.secret_key)); new_inp->sctp_ep.current_secret_number = old_inp->sctp_ep.current_secret_number; new_inp->sctp_ep.last_secret_number = old_inp->sctp_ep.last_secret_number; new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; /* make it so new data pours into the new socket */ stcb->sctp_socket = new_inp->sctp_socket; stcb->sctp_ep = new_inp; /* Copy the port across */ lport = new_inp->sctp_lport = old_inp->sctp_lport; rport = stcb->rport; /* Pull the tcb from the old association */ LIST_REMOVE(stcb, sctp_tcbhash); LIST_REMOVE(stcb, sctp_tcblist); /* Now insert the new_inp into the TCP connected hash */ head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), sctppcbinfo.hashtcpmark)]; LIST_INSERT_HEAD(head, new_inp, sctp_hash); /* Its safe to access */ new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; /* Now move the tcb into the endpoint list */ LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); /* * Question, do we even need to worry about the ep-hash since we * only have one connection? Probably not :> so lets get rid of it * and not suck up any kernel memory in that. */ /* Ok. Let's restart timer. */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, stcb, net); } SCTP_INP_INFO_WUNLOCK(); if (new_inp->sctp_tcbhash != NULL) { SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); new_inp->sctp_tcbhash = NULL; } if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { /* Subset bound, so copy in the laddr list from the old_inp */ LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); if (laddr == NULL) { /* * Gak, what can we do? This assoc is really * HOSED. We probably should send an abort * here. */ #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Association hosed in TCP model, out of laddr memory\n"); } #endif /* SCTP_DEBUG */ continue; } SCTP_INCR_LADDR_COUNT(); bzero(laddr, sizeof(*laddr)); laddr->ifa = oladdr->ifa; LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, sctp_nxt_addr); new_inp->laddr_count++; } } /* * Now any running timers need to be adjusted since we really don't * care if they are running or not just blast in the new_inp into * all of them. */ stcb->asoc.hb_timer.ep = (void *)new_inp; stcb->asoc.dack_timer.ep = (void *)new_inp; stcb->asoc.asconf_timer.ep = (void *)new_inp; stcb->asoc.strreset_timer.ep = (void *)new_inp; stcb->asoc.shut_guard_timer.ep = (void *)new_inp; stcb->asoc.autoclose_timer.ep = (void *)new_inp; stcb->asoc.delayed_event_timer.ep = (void *)new_inp; /* now what about the nets? */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { net->pmtu_timer.ep = (void *)new_inp; net->rxt_timer.ep = (void *)new_inp; net->fr_timer.ep = (void *)new_inp; } SCTP_INP_WUNLOCK(new_inp); SCTP_INP_WUNLOCK(old_inp); } static int sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) { struct sctppcbhead *head; struct sctp_inpcb *t_inp; int fnd; head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, sctppcbinfo.hashmark)]; LIST_FOREACH(t_inp, head, sctp_hash) { if (t_inp->sctp_lport != lport) { continue; } /* is it in the VRF in question */ fnd = 0; if (t_inp->def_vrf_id == vrf_id) fnd = 1; if (!fnd) continue; /* This one is in use. */ /* check the v6/v4 binding issue */ if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && SCTP_IPV6_V6ONLY(t_inp)) { if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { /* collision in V6 space */ return (1); } else { /* inp is BOUND_V4 no conflict */ continue; } } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { /* t_inp is bound v4 and v6, conflict always */ return (1); } else { /* t_inp is bound only V4 */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && SCTP_IPV6_V6ONLY(t_inp)) { /* no conflict */ continue; } /* else fall through to conflict */ } return (1); } return (0); } int sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p) { /* bind a ep to a socket address */ struct sctppcbhead *head; struct sctp_inpcb *inp, *inp_tmp; struct inpcb *ip_inp; int bindall; uint16_t lport; int error; uint32_t vrf_id; lport = 0; error = 0; bindall = 1; inp = (struct sctp_inpcb *)so->so_pcb; ip_inp = (struct inpcb *)so->so_pcb; #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { if (addr) { printf("Bind called port:%d\n", ntohs(((struct sockaddr_in *)addr)->sin_port)); printf("Addr :"); sctp_print_address(addr); } } #endif /* SCTP_DEBUG */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { /* already did a bind, subsequent binds NOT allowed ! */ return (EINVAL); } if (addr != NULL) { if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; /* IPV6_V6ONLY socket? */ if (SCTP_IPV6_V6ONLY(ip_inp)) { return (EINVAL); } if (addr->sa_len != sizeof(*sin)) return (EINVAL); sin = (struct sockaddr_in *)addr; lport = sin->sin_port; if (sin->sin_addr.s_addr != INADDR_ANY) { bindall = 0; } } else if (addr->sa_family == AF_INET6) { /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)addr; if (addr->sa_len != sizeof(*sin6)) return (EINVAL); lport = sin6->sin6_port; if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { bindall = 0; /* KAME hack: embed scopeid */ if (sa6_embedscope(sin6, ip6_use_defzone) != 0) return (EINVAL); } /* this must be cleared for ifa_ifwithaddr() */ sin6->sin6_scope_id = 0; } else { return (EAFNOSUPPORT); } } /* * Setup a vrf_id to be the default for the non-bind-all case. */ vrf_id = inp->def_vrf_id; SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(inp); /* increase our count due to the unlock we do */ SCTP_INP_INCR_REF(inp); if (lport) { /* * Did the caller specify a port? if so we must see if a ep * already has this one bound. */ /* got to be root to get at low ports */ if (ntohs(lport) < IPPORT_RESERVED) { if (p && (error = priv_check_cred(p->td_ucred, PRIV_NETINET_RESERVEDPORT, SUSER_ALLOWJAIL ) )) { SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (error); } } if (p == NULL) { SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (error); } SCTP_INP_WUNLOCK(inp); if (bindall) { vrf_id = inp->def_vrf_id; inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); if (inp_tmp != NULL) { /* * lock guy returned and lower count note * that we are not bound so inp_tmp should * NEVER be inp. And it is this inp * (inp_tmp) that gets the reference bump, * so we must lower it. */ SCTP_INP_DECR_REF(inp_tmp); SCTP_INP_DECR_REF(inp); /* unlock info */ SCTP_INP_INFO_WUNLOCK(); return (EADDRNOTAVAIL); } } else { inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); if (inp_tmp != NULL) { /* * lock guy returned and lower count note * that we are not bound so inp_tmp should * NEVER be inp. And it is this inp * (inp_tmp) that gets the reference bump, * so we must lower it. */ SCTP_INP_DECR_REF(inp_tmp); SCTP_INP_DECR_REF(inp); /* unlock info */ SCTP_INP_INFO_WUNLOCK(); return (EADDRNOTAVAIL); } } SCTP_INP_WLOCK(inp); if (bindall) { /* verify that no lport is not used by a singleton */ if (sctp_isport_inuse(inp, lport, vrf_id)) { /* Sorry someone already has this one bound */ SCTP_INP_DECR_REF(inp); SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (EADDRNOTAVAIL); } } } else { /* * get any port but lets make sure no one has any address * with this port bound */ /* * setup the inp to the top (I could use the union but this * is just as easy */ uint32_t port_guess; uint16_t port_attempt; int not_done = 1; int not_found = 1; while (not_done) { port_guess = sctp_select_initial_TSN(&inp->sctp_ep); port_attempt = (port_guess & 0x0000ffff); if (port_attempt == 0) { goto next_half; } if (port_attempt < IPPORT_RESERVED) { port_attempt += IPPORT_RESERVED; } vrf_id = inp->def_vrf_id; if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) { /* got a port we can use */ not_found = 0; break; } if (not_found == 1) { /* We can use this port */ not_done = 0; continue; } /* try upper half */ next_half: port_attempt = ((port_guess >> 16) & 0x0000ffff); if (port_attempt == 0) { goto last_try; } if (port_attempt < IPPORT_RESERVED) { port_attempt += IPPORT_RESERVED; } vrf_id = inp->def_vrf_id; if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) { /* got a port we can use */ not_found = 0; break; } if (not_found == 1) { /* We can use this port */ not_done = 0; continue; } /* try two half's added together */ last_try: port_attempt = (((port_guess >> 16) & 0x0000ffff) + (port_guess & 0x0000ffff)); if (port_attempt == 0) { /* get a new random number */ continue; } if (port_attempt < IPPORT_RESERVED) { port_attempt += IPPORT_RESERVED; } vrf_id = inp->def_vrf_id; if (sctp_isport_inuse(inp, htons(port_attempt), vrf_id) == 1) { /* got a port we can use */ not_found = 0; break; } if (not_found == 1) { /* We can use this port */ not_done = 0; continue; } } /* we don't get out of the loop until we have a port */ lport = htons(port_attempt); } SCTP_INP_DECR_REF(inp); if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { /* * this really should not happen. The guy did a non-blocking * bind and then did a close at the same time. */ SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (EINVAL); } /* ok we look clear to give out this port, so lets setup the binding */ if (bindall) { /* binding to all addresses, so just set in the proper flags */ inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); /* set the automatic addr changes from kernel flag */ if (sctp_auto_asconf == 0) { sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); } else { sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); } } else { /* * bind specific, make sure flags is off and add a new * address structure to the sctp_addr_list inside the ep * structure. * * We will need to allocate one and insert it at the head. The * socketopt call can just insert new addresses in there as * well. It will also have to do the embed scope kame hack * too (before adding). */ struct sctp_ifa *ifa; struct sockaddr_storage store_sa; memset(&store_sa, 0, sizeof(store_sa)); if (addr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)&store_sa; memcpy(sin, addr, sizeof(struct sockaddr_in)); sin->sin_port = 0; } else if (addr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&store_sa; memcpy(sin6, addr, sizeof(struct sockaddr_in6)); sin6->sin6_port = 0; } /* * first find the interface with the bound address need to * zero out the port to find the address! yuck! can't do * this earlier since need port for sctp_pcb_findep() */ ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, vrf_id, 0); if (ifa == NULL) { /* Can't find an interface with that address */ SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (EADDRNOTAVAIL); } if (addr->sa_family == AF_INET6) { /* GAK, more FIXME IFA lock? */ if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { /* Can't bind a non-existent addr. */ SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (EINVAL); } } /* we're not bound all */ inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; /* set the automatic addr changes from kernel flag */ sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); if (sctp_auto_asconf == 0) { sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); } else { /* * allow bindx() to send ASCONF's for binding * changes */ sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); } /* add this address to the endpoint list */ error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); if (error != 0) { SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (error); } inp->laddr_count++; } /* find the bucket */ head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, sctppcbinfo.hashmark)]; /* put it in the bucket */ LIST_INSERT_HEAD(head, inp, sctp_hash); #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Main hash to bind at head:%p, bound port:%d\n", head, ntohs(lport)); } #endif /* set in the port */ inp->sctp_lport = lport; /* turn off just the unbound flag */ inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); return (0); } static void sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) { struct sctp_iterator *it; /* * We enter with the only the ITERATOR_LOCK in place and a write * lock on the inp_info stuff. */ /* * Go through all iterators, we must do this since it is possible * that some iterator does NOT have the lock, but is waiting for it. * And the one that had the lock has either moved in the last * iteration or we just cleared it above. We need to find all of * those guys. The list of iterators should never be very big * though. */ TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { if (it == inp->inp_starting_point_for_iterator) /* skip this guy, he's special */ continue; if (it->inp == inp) { /* * This is tricky and we DON'T lock the iterator. * Reason is he's running but waiting for me since * inp->inp_starting_point_for_iterator has the lock * on me (the guy above we skipped). This tells us * its is not running but waiting for * inp->inp_starting_point_for_iterator to be * released by the guy that does have our INP in a * lock. */ if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { it->inp = NULL; it->stcb = NULL; } else { /* set him up to do the next guy not me */ it->inp = inp_next; it->stcb = NULL; } } } it = inp->inp_starting_point_for_iterator; if (it) { if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { it->inp = NULL; } else { it->inp = inp_next; } it->stcb = NULL; } } /* release sctp_inpcb unbind the port */ void sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) { /* * Here we free a endpoint. We must find it (if it is in the Hash * table) and remove it from there. Then we must also find it in the * overall list and remove it from there. After all removals are * complete then any timer has to be stopped. Then start the actual * freeing. a) Any local lists. b) Any associations. c) The hash of * all associations. d) finally the ep itself. */ struct sctp_pcb *m; struct sctp_inpcb *inp_save; struct sctp_tcb *asoc, *nasoc; struct sctp_laddr *laddr, *nladdr; struct inpcb *ip_pcb; struct socket *so; struct sctp_queued_to_read *sq; int cnt; sctp_sharedkey_t *shared_key; #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 0); #endif SCTP_ITERATOR_LOCK(); so = inp->sctp_socket; if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { /* been here before.. eeks.. get out of here */ printf("This conflict in free SHOULD not be happening!\n"); SCTP_ITERATOR_UNLOCK(); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 1); #endif return; } SCTP_ASOC_CREATE_LOCK(inp); SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(inp); /* * First time through we have the socket lock, after that no more. */ if (from == 1) { /* * Once we are in we can remove the flag from = 1 is only * passed from the actual closing routines that are called * via the sockets layer. */ inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; } sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, SCTP_FROM_SCTP_PCB + SCTP_LOC_1); if (inp->control) { sctp_m_freem(inp->control); inp->control = NULL; } if (inp->pkt) { sctp_m_freem(inp->pkt); inp->pkt = NULL; } m = &inp->sctp_ep; ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer * here but I will be nice :> (i.e. * ip_pcb = ep;) */ if (immediate == 0) { int cnt_in_sd; cnt_in_sd = 0; for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; asoc = nasoc) { nasoc = LIST_NEXT(asoc, sctp_tcblist); if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { /* Skip guys being freed */ asoc->sctp_socket = NULL; cnt_in_sd++; continue; } if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { /* Just abandon things in the front states */ if (asoc->asoc.total_output_queue_size == 0) { sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); continue; } } SCTP_TCB_LOCK(asoc); /* Disconnect the socket please */ asoc->sctp_socket = NULL; asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; if ((asoc->asoc.size_on_reasm_queue > 0) || (asoc->asoc.control_pdapi) || (asoc->asoc.size_on_all_streams > 0) || (so && (so->so_rcv.sb_cc > 0)) ) { /* Left with Data unread */ struct mbuf *op_err; op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 0, M_DONTWAIT, 1, MT_DATA); if (op_err) { /* Fill in the user initiated abort */ struct sctp_paramhdr *ph; uint32_t *ippp; SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr) + sizeof(uint32_t); ph = mtod(op_err, struct sctp_paramhdr *); ph->param_type = htons( SCTP_CAUSE_USER_INITIATED_ABT); ph->param_length = htons(SCTP_BUF_LEN(op_err)); ippp = (uint32_t *) (ph + 1); *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); } asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; sctp_send_abort_tcb(asoc, op_err); SCTP_STAT_INCR_COUNTER32(sctps_aborted); if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); continue; } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && TAILQ_EMPTY(&asoc->asoc.sent_queue) && (asoc->asoc.stream_queue_cnt == 0) ) { if (asoc->asoc.locked_on_sending) { goto abort_anyway; } if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { /* * there is nothing queued to send, * so I send shutdown */ sctp_send_shutdown(asoc, asoc->asoc.primary_destination); if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, asoc->asoc.primary_destination); sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, asoc->asoc.primary_destination); sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); } } else { /* mark into shutdown pending */ struct sctp_stream_queue_pending *sp; asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, asoc->asoc.primary_destination); if (asoc->asoc.locked_on_sending) { sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), sctp_streamhead); if (sp == NULL) { printf("Error, sp is NULL, locked on sending is %p strm:%d\n", asoc->asoc.locked_on_sending, asoc->asoc.locked_on_sending->stream_no); } else { if ((sp->length == 0) && (sp->msg_is_complete == 0)) asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; } } if (TAILQ_EMPTY(&asoc->asoc.send_queue) && TAILQ_EMPTY(&asoc->asoc.sent_queue) && (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { struct mbuf *op_err; abort_anyway: op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 0, M_DONTWAIT, 1, MT_DATA); if (op_err) { /* * Fill in the user * initiated abort */ struct sctp_paramhdr *ph; uint32_t *ippp; SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)); ph = mtod(op_err, struct sctp_paramhdr *); ph->param_type = htons( SCTP_CAUSE_USER_INITIATED_ABT); ph->param_length = htons(SCTP_BUF_LEN(op_err)); ippp = (uint32_t *) (ph + 1); *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); } asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; sctp_send_abort_tcb(asoc, op_err); SCTP_STAT_INCR_COUNTER32(sctps_aborted); if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); continue; } } cnt_in_sd++; SCTP_TCB_UNLOCK(asoc); } /* now is there some left in our SHUTDOWN state? */ if (cnt_in_sd) { SCTP_INP_WUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); SCTP_ITERATOR_UNLOCK(); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 2); #endif return; } } inp->sctp_socket = NULL; if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != SCTP_PCB_FLAGS_UNBOUND) { /* * ok, this guy has been bound. It's port is somewhere in * the sctppcbinfo hash table. Remove it! */ LIST_REMOVE(inp, sctp_hash); inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; } /* * If there is a timer running to kill us, forget it, since it may * have a contest on the INP lock.. which would cause us to die ... */ cnt = 0; for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; asoc = nasoc) { nasoc = LIST_NEXT(asoc, sctp_tcblist); if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { cnt++; continue; } /* Free associations that are NOT killing us */ SCTP_TCB_LOCK(asoc); if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { struct mbuf *op_err; uint32_t *ippp; op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 0, M_DONTWAIT, 1, MT_DATA); if (op_err) { /* Fill in the user initiated abort */ struct sctp_paramhdr *ph; SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)); ph = mtod(op_err, struct sctp_paramhdr *); ph->param_type = htons( SCTP_CAUSE_USER_INITIATED_ABT); ph->param_length = htons(SCTP_BUF_LEN(op_err)); ippp = (uint32_t *) (ph + 1); *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); } asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; sctp_send_abort_tcb(asoc, op_err); SCTP_STAT_INCR_COUNTER32(sctps_aborted); } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { cnt++; SCTP_TCB_UNLOCK(asoc); continue; } if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { SCTP_STAT_DECR_GAUGE32(sctps_currestab); } sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); } if (cnt) { /* Ok we have someone out there that will kill us */ SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); SCTP_INP_WUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); SCTP_ITERATOR_UNLOCK(); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 3); #endif return; } if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); SCTP_INP_WUNLOCK(inp); SCTP_ASOC_CREATE_UNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); SCTP_ITERATOR_UNLOCK(); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 4); #endif return; } SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); inp->sctp_ep.signature_change.type = 0; inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 5); #endif SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; /* Clear the read queue */ while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { TAILQ_REMOVE(&inp->read_queue, sq, next); sctp_free_remote_addr(sq->whoFrom); if (so) so->so_rcv.sb_cc -= sq->length; if (sq->data) { sctp_m_freem(sq->data); sq->data = NULL; } /* * no need to free the net count, since at this point all * assoc's are gone. */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); SCTP_DECR_READQ_COUNT(); } /* Now the sctp_pcb things */ /* * free each asoc if it is not already closed/free. we can't use the * macro here since le_next will get freed as part of the * sctp_free_assoc() call. */ cnt = 0; if (so) { #ifdef IPSEC ipsec4_delete_pcbpolicy(ip_pcb); #endif /* IPSEC */ /* Unlocks not needed since the socket is gone now */ } if (ip_pcb->inp_options) { (void)sctp_m_free(ip_pcb->inp_options); ip_pcb->inp_options = 0; } if (ip_pcb->inp_moptions) { ip_freemoptions(ip_pcb->inp_moptions); ip_pcb->inp_moptions = 0; } #ifdef INET6 if (ip_pcb->inp_vflag & INP_IPV6) { struct in6pcb *in6p; in6p = (struct in6pcb *)inp; ip6_freepcbopts(in6p->in6p_outputopts); } #endif /* INET6 */ ip_pcb->inp_vflag = 0; /* free up authentication fields */ if (inp->sctp_ep.local_auth_chunks != NULL) sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); if (inp->sctp_ep.local_hmacs != NULL) sctp_free_hmaclist(inp->sctp_ep.local_hmacs); shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); while (shared_key) { LIST_REMOVE(shared_key, next); sctp_free_sharedkey(shared_key); shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); } inp_save = LIST_NEXT(inp, sctp_list); LIST_REMOVE(inp, sctp_list); /* fix any iterators only after out of the list */ sctp_iterator_inp_being_freed(inp, inp_save); /* * if we have an address list the following will free the list of * ifaddr's that are set into this ep. Again macro limitations here, * since the LIST_FOREACH could be a bad idea. */ for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; laddr = nladdr) { nladdr = LIST_NEXT(laddr, sctp_nxt_addr); sctp_remove_laddr(laddr); } #ifdef SCTP_TRACK_FREED_ASOCS /* TEMP CODE */ for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; asoc = nasoc) { nasoc = LIST_NEXT(asoc, sctp_tcblist); LIST_REMOVE(asoc, sctp_tcblist); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); SCTP_DECR_ASOC_COUNT(); } /* *** END TEMP CODE *** */ #endif /* Now lets see about freeing the EP hash table. */ if (inp->sctp_tcbhash != NULL) { SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); inp->sctp_tcbhash = NULL; } /* Now we must put the ep memory back into the zone pool */ SCTP_INP_LOCK_DESTROY(inp); SCTP_INP_READ_DESTROY(inp); SCTP_ASOC_CREATE_LOCK_DESTROY(inp); SCTP_INP_INFO_WUNLOCK(); SCTP_ITERATOR_UNLOCK(); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); SCTP_DECR_EP_COUNT(); } struct sctp_nets * sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) { struct sctp_nets *net; /* locate the address */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) return (net); } return (NULL); } /* * add's a remote endpoint address, done with the INIT/INIT-ACK as well as * when a ASCONF arrives that adds it. It will also initialize all the cwnd * stats of stuff. */ int sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) { struct sctp_ifa *sctp_ifa; sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); if (sctp_ifa) { return (1); } else { return (0); } } void sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) { net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); /* we always get at LEAST 2 MTU's */ if (net->cwnd < (2 * net->mtu)) { net->cwnd = 2 * net->mtu; } net->ssthresh = stcb->asoc.peers_rwnd; } int sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, int set_scope, int from) { /* * The following is redundant to the same lines in the * sctp_aloc_assoc() but is needed since other's call the add * address function */ struct sctp_nets *net, *netfirst; int addr_inscope; #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Adding an address (from:%d) to the peer: ", from); sctp_print_address(newaddr); } #endif netfirst = sctp_findnet(stcb, newaddr); if (netfirst) { /* * Lie and return ok, we don't want to make the association * go away for this behavior. It will happen in the TCP * model in a connected socket. It does not reach the hash * table until after the association is built so it can't be * found. Mark as reachable, since the initial creation will * have been cleared and the NOT_IN_ASSOC flag will have * been added... and we don't want to end up removing it * back out. */ if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { netfirst->dest_state = (SCTP_ADDR_REACHABLE | SCTP_ADDR_UNCONFIRMED); } else { netfirst->dest_state = SCTP_ADDR_REACHABLE; } return (0); } addr_inscope = 1; if (newaddr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)newaddr; if (sin->sin_addr.s_addr == 0) { /* Invalid address */ return (-1); } /* zero out the bzero area */ memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); /* assure len is set */ sin->sin_len = sizeof(struct sockaddr_in); if (set_scope) { #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE stcb->ipv4_local_scope = 1; #else if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { stcb->asoc.ipv4_local_scope = 1; } #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ } else { /* Validate the address is in scope */ if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && (stcb->asoc.ipv4_local_scope == 0)) { addr_inscope = 0; } } } else if (newaddr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)newaddr; if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { /* Invalid address */ return (-1); } /* assure len is set */ sin6->sin6_len = sizeof(struct sockaddr_in6); if (set_scope) { if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { stcb->asoc.loopback_scope = 1; stcb->asoc.local_scope = 0; stcb->asoc.ipv4_local_scope = 1; stcb->asoc.site_scope = 1; } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { /* * If the new destination is a LINK_LOCAL we * must have common site scope. Don't set * the local scope since we may not share * all links, only loopback can do this. * Links on the local network would also be * on our private network for v4 too. */ stcb->asoc.ipv4_local_scope = 1; stcb->asoc.site_scope = 1; } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { /* * If the new destination is SITE_LOCAL then * we must have site scope in common. */ stcb->asoc.site_scope = 1; } } else { /* Validate the address is in scope */ if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && (stcb->asoc.loopback_scope == 0)) { addr_inscope = 0; } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && (stcb->asoc.local_scope == 0)) { addr_inscope = 0; } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && (stcb->asoc.site_scope == 0)) { addr_inscope = 0; } } } else { /* not supported family type */ return (-1); } net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); if (net == NULL) { return (-1); } SCTP_INCR_RADDR_COUNT(); bzero(net, sizeof(*net)); SCTP_GETTIME_TIMEVAL(&net->start_time); memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); if (newaddr->sa_family == AF_INET) { ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; } else if (newaddr->sa_family == AF_INET6) { ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; } net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { stcb->asoc.loopback_scope = 1; stcb->asoc.ipv4_local_scope = 1; stcb->asoc.local_scope = 0; stcb->asoc.site_scope = 1; addr_inscope = 1; } net->failure_threshold = stcb->asoc.def_net_failure; if (addr_inscope == 0) { net->dest_state = (SCTP_ADDR_REACHABLE | SCTP_ADDR_OUT_OF_SCOPE); } else { if (from == SCTP_ADDR_IS_CONFIRMED) /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ net->dest_state = SCTP_ADDR_REACHABLE; else net->dest_state = SCTP_ADDR_REACHABLE | SCTP_ADDR_UNCONFIRMED; } net->RTO = stcb->asoc.initial_rto; stcb->asoc.numnets++; *(&net->ref_count) = 1; net->tos_flowlabel = 0; #ifdef INET if (newaddr->sa_family == AF_INET) net->tos_flowlabel = stcb->asoc.default_tos; #endif #ifdef INET6 if (newaddr->sa_family == AF_INET6) net->tos_flowlabel = stcb->asoc.default_flowlabel; #endif /* Init the timer structure */ SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); SCTP_OS_TIMER_INIT(&net->fr_timer.timer); SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); /* Now generate a route for this guy */ /* KAME hack: embed scopeid */ if (newaddr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; (void)sa6_embedscope(sin6, ip6_use_defzone); sin6->sin6_scope_id = 0; } rtalloc_ign((struct route *)&net->ro, 0UL); if (newaddr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; (void)sa6_recoverscope(sin6); } if ((net->ro.ro_rt) && (net->ro.ro_rt->rt_ifp)) { net->mtu = net->ro.ro_rt->rt_ifp->if_mtu; if (from == SCTP_ALLOC_ASOC) { stcb->asoc.smallest_mtu = net->mtu; } /* start things off to match mtu of interface please. */ net->ro.ro_rt->rt_rmx.rmx_mtu = net->ro.ro_rt->rt_ifp->if_mtu; } else { net->mtu = stcb->asoc.smallest_mtu; } if (stcb->asoc.smallest_mtu > net->mtu) { stcb->asoc.smallest_mtu = net->mtu; } /* * We take the max of the burst limit times a MTU or the * INITIAL_CWND. We then limit this to 4 MTU's of sending. */ sctp_set_initial_cc_param(stcb, net); #if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); #endif /* * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning * of assoc (2005/06/27, iyengar@cis.udel.edu) */ net->find_pseudo_cumack = 1; net->find_rtx_pseudo_cumack = 1; net->src_addr_selected = 0; netfirst = TAILQ_FIRST(&stcb->asoc.nets); if (net->ro.ro_rt == NULL) { /* Since we have no route put it at the back */ TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); } else if (netfirst == NULL) { /* We are the first one in the pool. */ TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); } else if (netfirst->ro.ro_rt == NULL) { /* * First one has NO route. Place this one ahead of the first * one. */ TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { /* * This one has a different interface than the one at the * top of the list. Place it ahead. */ TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); } else { /* * Ok we have the same interface as the first one. Move * forward until we find either a) one with a NULL route... * insert ahead of that b) one with a different ifp.. insert * after that. c) end of the list.. insert at the tail. */ struct sctp_nets *netlook; do { netlook = TAILQ_NEXT(netfirst, sctp_next); if (netlook == NULL) { /* End of the list */ TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); break; } else if (netlook->ro.ro_rt == NULL) { /* next one has NO route */ TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); break; } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, net, sctp_next); break; } /* Shift forward */ netfirst = netlook; } while (netlook != NULL); } /* got to have a primary set */ if (stcb->asoc.primary_destination == 0) { stcb->asoc.primary_destination = net; } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && (net->ro.ro_rt) && ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { /* No route to current primary adopt new primary */ stcb->asoc.primary_destination = net; } sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net); /* Validate primary is first */ net = TAILQ_FIRST(&stcb->asoc.nets); if ((net != stcb->asoc.primary_destination) && (stcb->asoc.primary_destination)) { /* * first one on the list is NOT the primary sctp_cmpaddr() * is much more efficent if the primary is the first on the * list, make it so. */ TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); } return (0); } /* * allocate an association and add it to the endpoint. The caller must be * careful to add all additional addresses once they are know right away or * else the assoc will be may experience a blackout scenario. */ struct sctp_tcb * sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, int for_a_init, int *error, uint32_t override_tag, uint32_t vrf) { struct sctp_tcb *stcb; struct sctp_association *asoc; struct sctpasochead *head; uint16_t rport; int err; /* * Assumption made here: Caller has done a * sctp_findassociation_ep_addr(ep, addr's); to make sure the * address does not exist already. */ if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { /* Hit max assoc, sorry no more */ *error = ENOBUFS; return (NULL); } SCTP_INP_RLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { /* * If its in the TCP pool, its NOT allowed to create an * association. The parent listener needs to call * sctp_aloc_assoc.. or the one-2-many socket. If a peeled * off, or connected one does this.. its an error. */ SCTP_INP_RUNLOCK(inp); *error = EINVAL; return (NULL); } #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB3) { printf("Allocate an association for peer:"); if (firstaddr) sctp_print_address(firstaddr); else printf("None\n"); printf("Port:%d\n", ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); } #endif /* SCTP_DEBUG */ if (firstaddr->sa_family == AF_INET) { struct sockaddr_in *sin; sin = (struct sockaddr_in *)firstaddr; if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { /* Invalid address */ SCTP_INP_RUNLOCK(inp); *error = EINVAL; return (NULL); } rport = sin->sin_port; } else if (firstaddr->sa_family == AF_INET6) { struct sockaddr_in6 *sin6; sin6 = (struct sockaddr_in6 *)firstaddr; if ((sin6->sin6_port == 0) || (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { /* Invalid address */ SCTP_INP_RUNLOCK(inp); *error = EINVAL; return (NULL); } rport = sin6->sin6_port; } else { /* not supported family type */ SCTP_INP_RUNLOCK(inp); *error = EINVAL; return (NULL); } SCTP_INP_RUNLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { /* * If you have not performed a bind, then we need to do the * ephemerial bind for you. */ if ((err = sctp_inpcb_bind(inp->sctp_socket, (struct sockaddr *)NULL, (struct thread *)NULL ))) { /* bind error, probably perm */ *error = err; return (NULL); } } stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); if (stcb == NULL) { /* out of memory? */ *error = ENOMEM; return (NULL); } SCTP_INCR_ASOC_COUNT(); bzero(stcb, sizeof(*stcb)); asoc = &stcb->asoc; SCTP_TCB_LOCK_INIT(stcb); SCTP_TCB_SEND_LOCK_INIT(stcb); /* setup back pointer's */ stcb->sctp_ep = inp; stcb->sctp_socket = inp->sctp_socket; if ((err = sctp_init_asoc(inp, asoc, for_a_init, override_tag, vrf))) { /* failed */ SCTP_TCB_LOCK_DESTROY(stcb); SCTP_TCB_SEND_LOCK_DESTROY(stcb); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); SCTP_DECR_ASOC_COUNT(); *error = err; return (NULL); } /* and the port */ stcb->rport = rport; SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(inp); if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { /* inpcb freed while alloc going on */ SCTP_TCB_LOCK_DESTROY(stcb); SCTP_TCB_SEND_LOCK_DESTROY(stcb); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); SCTP_INP_WUNLOCK(inp); SCTP_INP_INFO_WUNLOCK(); SCTP_DECR_ASOC_COUNT(); *error = EINVAL; return (NULL); } SCTP_TCB_LOCK(stcb); /* now that my_vtag is set, add it to the hash */ head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, sctppcbinfo.hashasocmark)]; /* put it in the bucket in the vtag hash of assoc's for the system */ LIST_INSERT_HEAD(head, stcb, sctp_asocs); SCTP_INP_INFO_WUNLOCK(); if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { /* failure.. memory error? */ if (asoc->strmout) SCTP_FREE(asoc->strmout); if (asoc->mapping_array) SCTP_FREE(asoc->mapping_array); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); SCTP_DECR_ASOC_COUNT(); SCTP_TCB_LOCK_DESTROY(stcb); SCTP_TCB_SEND_LOCK_DESTROY(stcb); *error = ENOBUFS; return (NULL); } /* Init all the timers */ SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); /* now file the port under the hash as well */ if (inp->sctp_tcbhash != NULL) { head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, inp->sctp_hashmark)]; LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); } SCTP_INP_WUNLOCK(inp); #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("Association %p now allocated\n", stcb); } #endif return (stcb); } void sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) { struct sctp_association *asoc; asoc = &stcb->asoc; asoc->numnets--; TAILQ_REMOVE(&asoc->nets, net, sctp_next); if (net == asoc->primary_destination) { /* Reset primary */ struct sctp_nets *lnet; lnet = TAILQ_FIRST(&asoc->nets); /* Try to find a confirmed primary */ asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); } if (net == asoc->last_data_chunk_from) { /* Reset primary */ asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); } if (net == asoc->last_control_chunk_from) { /* Clear net */ asoc->last_control_chunk_from = NULL; } sctp_free_remote_addr(net); } /* * remove a remote endpoint address from an association, it will fail if the * address does not exist. */ int sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) { /* * Here we need to remove a remote address. This is quite simple, we * first find it in the list of address for the association * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE * on that item. Note we do not allow it to be removed if there are * no other addresses. */ struct sctp_association *asoc; struct sctp_nets *net, *net_tmp; asoc = &stcb->asoc; /* locate the address */ for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { net_tmp = TAILQ_NEXT(net, sctp_next); if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { continue; } if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, remaddr)) { /* we found the guy */ if (asoc->numnets < 2) { /* Must have at LEAST two remote addresses */ return (-1); } else { sctp_remove_net(stcb, net); return (0); } } } /* not found. */ return (-2); } void sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) { struct sctpvtaghead *chain; struct sctp_tagblock *twait_block; struct timeval now; int set, i; SCTP_GETTIME_TIMEVAL(&now); chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; set = 0; if (!SCTP_LIST_EMPTY(chain)) { /* Block(s) present, lets find space, and expire on the fly */ LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { if ((twait_block->vtag_block[i].v_tag == 0) && !set) { twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; twait_block->vtag_block[i].v_tag = tag; set = 1; } else if ((twait_block->vtag_block[i].v_tag) && ((long)twait_block->vtag_block[i].tv_sec_at_expire > now.tv_sec)) { /* Audit expires this guy */ twait_block->vtag_block[i].tv_sec_at_expire = 0; twait_block->vtag_block[i].v_tag = 0; if (set == 0) { /* Reuse it for my new tag */ twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; twait_block->vtag_block[0].v_tag = tag; set = 1; } } } if (set) { /* * We only do up to the block where we can * place our tag for audits */ break; } } } /* Need to add a new block to chain */ if (!set) { SCTP_MALLOC(twait_block, struct sctp_tagblock *, sizeof(struct sctp_tagblock), "TimeWait"); if (twait_block == NULL) { return; } memset(twait_block, 0, sizeof(struct sctp_tagblock)); LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; twait_block->vtag_block[0].v_tag = tag; } } static void sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) { struct sctp_iterator *it; /* * Unlock the tcb lock we do this so we avoid a dead lock scenario * where the iterator is waiting on the TCB lock and the TCB lock is * waiting on the iterator lock. */ it = stcb->asoc.stcb_starting_point_for_iterator; if (it == NULL) { return; } if (it->inp != stcb->sctp_ep) { /* hmm, focused on the wrong one? */ return; } if (it->stcb != stcb) { return; } it->stcb = LIST_NEXT(stcb, sctp_tcblist); if (it->stcb == NULL) { /* done with all asoc's in this assoc */ if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { it->inp = NULL; } else { it->inp = LIST_NEXT(inp, sctp_list); } } } /* * Free the association after un-hashing the remote port. */ int sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) { int i; struct sctp_association *asoc; struct sctp_nets *net, *prev; struct sctp_laddr *laddr; struct sctp_tmit_chunk *chk; struct sctp_asconf_addr *aparam; struct sctp_stream_reset_list *liste; struct sctp_queued_to_read *sq; struct sctp_stream_queue_pending *sp; sctp_sharedkey_t *shared_key; struct socket *so; int ccnt = 0; int cnt = 0; /* first, lets purge the entry from the hash table. */ #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, stcb, 6); #endif if (stcb->asoc.state == 0) { #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 7); #endif /* there is no asoc, really TSNH :-0 */ return (1); } /* TEMP CODE */ if (stcb->freed_from_where == 0) { /* Only record the first place free happened from */ stcb->freed_from_where = from_location; } /* TEMP CODE */ asoc = &stcb->asoc; if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) /* nothing around */ so = NULL; else so = inp->sctp_socket; /* * We used timer based freeing if a reader or writer is in the way. * So we first check if we are actually being called from a timer, * if so we abort early if a reader or writer is still in the way. */ if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && (from_inpcbfree == SCTP_NORMAL_PROC)) { /* * is it the timer driving us? if so are the reader/writers * gone? */ if (stcb->asoc.refcnt) { /* nope, reader or writer in the way */ sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); /* no asoc destroyed */ SCTP_TCB_UNLOCK(stcb); #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, stcb, 8); #endif return (0); } } /* now clean up any other timers */ SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); TAILQ_FOREACH(net, &asoc->nets, sctp_next) { SCTP_OS_TIMER_STOP(&net->fr_timer.timer); SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); } /* Now the read queue needs to be cleaned up (only once) */ cnt = 0; if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { SCTP_INP_READ_LOCK(inp); TAILQ_FOREACH(sq, &inp->read_queue, next) { if (sq->stcb == stcb) { sq->do_not_ref_stcb = 1; sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; /* * If there is no end, there never will be * now. */ if (sq->end_added == 0) { /* Held for PD-API clear that. */ sq->pdapi_aborted = 1; sq->held_length = 0; if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { /* * Need to add a PD-API * aborted indication. * Setting the control_pdapi * assures that it will be * added right after this * msg. */ stcb->asoc.control_pdapi = sq; sctp_notify_partial_delivery_indication(stcb, SCTP_PARTIAL_DELIVERY_ABORTED, 1); stcb->asoc.control_pdapi = NULL; } } /* Add an end to wake them */ sq->end_added = 1; cnt++; } } SCTP_INP_READ_UNLOCK(inp); if (stcb->block_entry) { cnt++; stcb->block_entry->error = ECONNRESET; stcb->block_entry = NULL; } } stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { /* * reader or writer in the way, we have hopefully given him * something to chew on above. */ sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); SCTP_TCB_UNLOCK(stcb); if (so) { SCTP_INP_RLOCK(inp); if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) /* nothing around */ so = NULL; if (so) { /* Wake any reader/writers */ sctp_sorwakeup(inp, so); sctp_sowwakeup(inp, so); } SCTP_INP_RUNLOCK(inp); } #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, stcb, 9); #endif /* no asoc destroyed */ return (0); } #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, stcb, 10); #endif /* * When I reach here, no others want to kill the assoc yet.. and I * own the lock. Now its possible an abort comes in when I do the * lock exchange below to grab all the locks to do the final take * out. to prevent this we increment the count, which will start a * timer and blow out above thus assuring us that we hold exclusive * killing of the asoc. Note that after getting back the TCB lock we * will go ahead and increment the counter back up and stop any * timer a passing stranger may have started :-S */ if (from_inpcbfree == SCTP_NORMAL_PROC) { atomic_add_int(&stcb->asoc.refcnt, 1); SCTP_TCB_UNLOCK(stcb); SCTP_ITERATOR_LOCK(); SCTP_INP_INFO_WLOCK(); SCTP_INP_WLOCK(inp); SCTP_TCB_LOCK(stcb); } /* Double check the GONE flag */ if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) /* nothing around */ so = NULL; if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { /* * For TCP type we need special handling when we are * connected. We also include the peel'ed off ones to. */ if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; if (so) { SOCK_LOCK(so); if (so->so_rcv.sb_cc == 0) { so->so_state &= ~(SS_ISCONNECTING | SS_ISDISCONNECTING | SS_ISCONFIRMING | SS_ISCONNECTED); } SOCK_UNLOCK(so); sctp_sowwakeup(inp, so); sctp_sorwakeup(inp, so); wakeup(&so->so_timeo); } } } /* * Make it invalid too, that way if its about to run it will abort * and return. */ sctp_iterator_asoc_being_freed(inp, stcb); /* re-increment the lock */ if (from_inpcbfree == SCTP_NORMAL_PROC) { atomic_add_int(&stcb->asoc.refcnt, -1); } asoc->state = 0; if (inp->sctp_tcbhash) { LIST_REMOVE(stcb, sctp_tcbhash); } if (stcb->asoc.in_restart_hash) { LIST_REMOVE(stcb, sctp_tcbrestarhash); } /* Now lets remove it from the list of ALL associations in the EP */ LIST_REMOVE(stcb, sctp_tcblist); if (from_inpcbfree == SCTP_NORMAL_PROC) { SCTP_INP_INCR_REF(inp); SCTP_INP_WUNLOCK(inp); SCTP_ITERATOR_UNLOCK(); } /* pull from vtag hash */ LIST_REMOVE(stcb, sctp_asocs); sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); /* * Now restop the timers to be sure - this is paranoia at is finest! */ SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); TAILQ_FOREACH(net, &asoc->nets, sctp_next) { SCTP_OS_TIMER_STOP(&net->fr_timer.timer); SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); } asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; prev = NULL; /* * The chunk lists and such SHOULD be empty but we check them just * in case. */ /* anything on the wheel needs to be removed */ for (i = 0; i < asoc->streamoutcnt; i++) { struct sctp_stream_out *outs; outs = &asoc->strmout[i]; /* now clean up any chunks here */ sp = TAILQ_FIRST(&outs->outqueue); while (sp) { TAILQ_REMOVE(&outs->outqueue, sp, next); if (sp->data) { sctp_m_freem(sp->data); sp->data = NULL; sp->tail_mbuf = NULL; } sctp_free_remote_addr(sp->net); sctp_free_spbufspace(stcb, asoc, sp); /* Free the zone stuff */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); SCTP_DECR_STRMOQ_COUNT(); sp = TAILQ_FIRST(&outs->outqueue); } } while ((sp = TAILQ_FIRST(&asoc->free_strmoq)) != NULL) { TAILQ_REMOVE(&asoc->free_strmoq, sp, next); if (sp->data) { sctp_m_freem(sp->data); sp->data = NULL; sp->tail_mbuf = NULL; } /* Free the zone stuff */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); SCTP_DECR_STRMOQ_COUNT(); atomic_add_int(&sctppcbinfo.ipi_free_strmoq, -1); } while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); SCTP_FREE(liste); } sq = TAILQ_FIRST(&asoc->pending_reply_queue); while (sq) { TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); if (sq->data) { sctp_m_freem(sq->data); sq->data = NULL; } sctp_free_remote_addr(sq->whoFrom); sq->whoFrom = NULL; sq->stcb = NULL; /* Free the ctl entry */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); SCTP_DECR_READQ_COUNT(); sq = TAILQ_FIRST(&asoc->pending_reply_queue); } chk = TAILQ_FIRST(&asoc->free_chunks); while (chk) { TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } ccnt++; SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); SCTP_DECR_CHK_COUNT(); atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); asoc->free_chunk_cnt--; chk = TAILQ_FIRST(&asoc->free_chunks); } /* pending send queue SHOULD be empty */ if (!TAILQ_EMPTY(&asoc->send_queue)) { chk = TAILQ_FIRST(&asoc->send_queue); while (chk) { TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } ccnt++; sctp_free_remote_addr(chk->whoTo); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); SCTP_DECR_CHK_COUNT(); chk = TAILQ_FIRST(&asoc->send_queue); } } /* if(ccnt) { printf("Freed %d from send_queue\n", ccnt); ccnt = 0; } */ /* sent queue SHOULD be empty */ if (!TAILQ_EMPTY(&asoc->sent_queue)) { chk = TAILQ_FIRST(&asoc->sent_queue); while (chk) { TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } ccnt++; sctp_free_remote_addr(chk->whoTo); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); SCTP_DECR_CHK_COUNT(); chk = TAILQ_FIRST(&asoc->sent_queue); } } /* if(ccnt) { printf("Freed %d from sent_queue\n", ccnt); ccnt = 0; } */ /* control queue MAY not be empty */ if (!TAILQ_EMPTY(&asoc->control_send_queue)) { chk = TAILQ_FIRST(&asoc->control_send_queue); while (chk) { TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } ccnt++; sctp_free_remote_addr(chk->whoTo); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); SCTP_DECR_CHK_COUNT(); chk = TAILQ_FIRST(&asoc->control_send_queue); } } /* if(ccnt) { printf("Freed %d from ctrl_queue\n", ccnt); ccnt = 0; } */ if (!TAILQ_EMPTY(&asoc->reasmqueue)) { chk = TAILQ_FIRST(&asoc->reasmqueue); while (chk) { TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } sctp_free_remote_addr(chk->whoTo); ccnt++; SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); SCTP_DECR_CHK_COUNT(); chk = TAILQ_FIRST(&asoc->reasmqueue); } } /* if(ccnt) { printf("Freed %d from reasm_queue\n", ccnt); ccnt = 0; } */ if (asoc->mapping_array) { SCTP_FREE(asoc->mapping_array); asoc->mapping_array = NULL; } /* the stream outs */ if (asoc->strmout) { SCTP_FREE(asoc->strmout); asoc->strmout = NULL; } asoc->streamoutcnt = 0; if (asoc->strmin) { struct sctp_queued_to_read *ctl; int i; for (i = 0; i < asoc->streamincnt; i++) { if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { /* We have somethings on the streamin queue */ ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); while (ctl) { TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); sctp_free_remote_addr(ctl->whoFrom); if (ctl->data) { sctp_m_freem(ctl->data); ctl->data = NULL; } /* * We don't free the address here * since all the net's were freed * above. */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); SCTP_DECR_READQ_COUNT(); ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); } } } SCTP_FREE(asoc->strmin); asoc->strmin = NULL; } asoc->streamincnt = 0; while (!TAILQ_EMPTY(&asoc->nets)) { net = TAILQ_FIRST(&asoc->nets); /* pull from list */ if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { #ifdef INVARIANTS panic("no net's left alloc'ed, or list points to itself"); #endif break; } prev = net; TAILQ_REMOVE(&asoc->nets, net, sctp_next); sctp_free_remote_addr(net); } while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); sctp_remove_laddr(laddr); } /* pending asconf (address) parameters */ while (!TAILQ_EMPTY(&asoc->asconf_queue)) { aparam = TAILQ_FIRST(&asoc->asconf_queue); TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); SCTP_FREE(aparam); } if (asoc->last_asconf_ack_sent != NULL) { sctp_m_freem(asoc->last_asconf_ack_sent); asoc->last_asconf_ack_sent = NULL; } /* clean up auth stuff */ if (asoc->local_hmacs) sctp_free_hmaclist(asoc->local_hmacs); if (asoc->peer_hmacs) sctp_free_hmaclist(asoc->peer_hmacs); if (asoc->local_auth_chunks) sctp_free_chunklist(asoc->local_auth_chunks); if (asoc->peer_auth_chunks) sctp_free_chunklist(asoc->peer_auth_chunks); sctp_free_authinfo(&asoc->authinfo); shared_key = LIST_FIRST(&asoc->shared_keys); while (shared_key) { LIST_REMOVE(shared_key, next); sctp_free_sharedkey(shared_key); shared_key = LIST_FIRST(&asoc->shared_keys); } /* Insert new items here :> */ /* Get rid of LOCK */ SCTP_TCB_LOCK_DESTROY(stcb); SCTP_TCB_SEND_LOCK_DESTROY(stcb); if (from_inpcbfree == SCTP_NORMAL_PROC) { SCTP_INP_INFO_WUNLOCK(); SCTP_INP_RLOCK(inp); } #ifdef SCTP_TRACK_FREED_ASOCS if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { /* now clean up the tasoc itself */ SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); SCTP_DECR_ASOC_COUNT(); } else { LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); } #else SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); SCTP_DECR_ASOC_COUNT(); #endif if (from_inpcbfree == SCTP_NORMAL_PROC) { if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { /* * If its NOT the inp_free calling us AND sctp_close * as been called, we call back... */ SCTP_INP_RUNLOCK(inp); /* * This will start the kill timer (if we are the * lastone) since we hold an increment yet. But this * is the only safe way to do this since otherwise * if the socket closes at the same time we are here * we might collide in the cleanup. */ sctp_inpcb_free(inp, 0, 0); SCTP_INP_DECR_REF(inp); goto out_of; } else { /* The socket is still open. */ SCTP_INP_DECR_REF(inp); } } if (from_inpcbfree == SCTP_NORMAL_PROC) { SCTP_INP_RUNLOCK(inp); } out_of: /* destroyed the asoc */ #ifdef SCTP_LOG_CLOSING sctp_log_closing(inp, NULL, 11); #endif return (1); } /* * determine if a destination is "reachable" based upon the addresses bound * to the current endpoint (e.g. only v4 or v6 currently bound) */ /* * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use * assoc level v4/v6 flags, as the assoc *may* not have the same address * types bound as its endpoint */ int sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) { struct sctp_inpcb *inp; int answer; /* * No locks here, the TCB, in all cases is already locked and an * assoc is up. There is either a INP lock by the caller applied (in * asconf case when deleting an address) or NOT in the HB case, * however if HB then the INP increment is up and the INP will not * be removed (on top of the fact that we have a TCB lock). So we * only want to read the sctp_flags, which is either bound-all or * not.. no protection needed since once an assoc is up you can't be * changing your binding. */ inp = stcb->sctp_ep; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* if bound all, destination is not restricted */ /* * RRS: Question during lock work: Is this correct? If you * are bound-all you still might need to obey the V4--V6 * flags??? IMO this bound-all stuff needs to be removed! */ return (1); } /* NOTE: all "scope" checks are done when local addresses are added */ if (destaddr->sa_family == AF_INET6) { answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; } else if (destaddr->sa_family == AF_INET) { answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; } else { /* invalid family, so it's unreachable */ answer = 0; } return (answer); } /* * update the inp_vflags on an endpoint */ static void sctp_update_ep_vflag(struct sctp_inpcb *inp) { struct sctp_laddr *laddr; /* first clear the flag */ inp->ip_inp.inp.inp_vflag = 0; /* set the flag based on addresses on the ep list */ LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == NULL) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { printf("An ounce of prevention is worth a pound of cure\n"); } #endif /* SCTP_DEBUG */ continue; } if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { continue; } if (laddr->ifa->address.sa.sa_family == AF_INET6) { inp->ip_inp.inp.inp_vflag |= INP_IPV6; } else if (laddr->ifa->address.sa.sa_family == AF_INET) { inp->ip_inp.inp.inp_vflag |= INP_IPV4; } } } /* * Add the address to the endpoint local address list There is nothing to be * done if we are bound to all addresses */ int sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) { struct sctp_laddr *laddr; int fnd, error; fnd = 0; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* You are already bound to all. You have it already */ return (0); } if (ifa->address.sa.sa_family == AF_INET6) { if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { /* Can't bind a non-useable addr. */ return (-1); } } /* first, is it already present? */ LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == ifa) { fnd = 1; break; } } if (fnd == 0) { /* Not in the ep list */ error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); if (error != 0) return (error); inp->laddr_count++; /* update inp_vflag flags */ if (ifa->address.sa.sa_family == AF_INET6) { inp->ip_inp.inp.inp_vflag |= INP_IPV6; } else if (ifa->address.sa.sa_family == AF_INET) { inp->ip_inp.inp.inp_vflag |= INP_IPV4; } } return (0); } /* * select a new (hopefully reachable) destination net (should only be used * when we deleted an ep addr that is the only usable source address to reach * the destination net) */ static void sctp_select_primary_destination(struct sctp_tcb *stcb) { struct sctp_nets *net; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { /* for now, we'll just pick the first reachable one we find */ if (net->dest_state & SCTP_ADDR_UNCONFIRMED) continue; if (sctp_destination_is_reachable(stcb, (struct sockaddr *)&net->ro._l_addr)) { /* found a reachable destination */ stcb->asoc.primary_destination = net; } } /* I can't there from here! ...we're gonna die shortly... */ } /* * Delete the address from the endpoint local address list There is nothing * to be done if we are bound to all addresses */ int sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) { struct sctp_laddr *laddr; int fnd; fnd = 0; if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { /* You are already bound to all. You have it already */ return (EINVAL); } LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { if (laddr->ifa == ifa) { fnd = 1; break; } } if (fnd && (inp->laddr_count < 2)) { /* can't delete unless there are at LEAST 2 addresses */ return (-1); } if (fnd) { /* * clean up any use of this address go through our * associations and clear any last_used_address that match * this one for each assoc, see if a new primary_destination * is needed */ struct sctp_tcb *stcb; /* clean up "next_addr_touse" */ if (inp->next_addr_touse == laddr) /* delete this address */ inp->next_addr_touse = NULL; /* clean up "last_used_address" */ LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { struct sctp_nets *net; SCTP_TCB_LOCK(stcb); if (stcb->asoc.last_used_address == laddr) /* delete this address */ stcb->asoc.last_used_address = NULL; /* * Now spin through all the nets and purge any ref * to laddr */ TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { if (net->ro._s_addr && (net->ro._s_addr->ifa == laddr->ifa)) { /* Yep, purge src address selected */ struct rtentry *rt; /* delete this address if cached */ rt = net->ro.ro_rt; if (rt != NULL) { RTFREE(rt); net->ro.ro_rt = NULL; } sctp_free_ifa(net->ro._s_addr); net->ro._s_addr = NULL; net->src_addr_selected = 0; } } SCTP_TCB_UNLOCK(stcb); } /* for each tcb */ /* remove it from the ep list */ sctp_remove_laddr(laddr); inp->laddr_count--; /* update inp_vflag flags */ sctp_update_ep_vflag(inp); } return (0); } /* * Add the addr to the TCB local address list For the BOUNDALL or dynamic * case, this is a "pending" address list (eg. addresses waiting for an * ASCONF-ACK response) For the subset binding, static case, this is a * "valid" address list */ int sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) { struct sctp_inpcb *inp; struct sctp_laddr *laddr; struct sctpladdr *list; int error; /* * Assumes TCB is locked.. and possibly the INP. May need to * confirm/fix that if we need it and is not the case. */ list = &stcb->asoc.sctp_restricted_addrs; inp = stcb->sctp_ep; if (ifa->address.sa.sa_family == AF_INET6) { if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { /* Can't bind a non-existent addr. */ return (-1); } } /* does the address already exist? */ LIST_FOREACH(laddr, list, sctp_nxt_addr) { if (laddr->ifa == ifa) { return (-1); } } /* add to the list */ error = sctp_insert_laddr(list, ifa, 0); if (error != 0) return (error); return (0); } /* * insert an laddr entry with the given ifa for the desired list */ int sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) { struct sctp_laddr *laddr; laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); if (laddr == NULL) { /* out of memory? */ return (EINVAL); } SCTP_INCR_LADDR_COUNT(); bzero(laddr, sizeof(*laddr)); laddr->ifa = ifa; laddr->action = act; atomic_add_int(&ifa->refcount, 1); /* insert it */ LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); return (0); } /* * Remove an laddr entry from the local address list (on an assoc) */ void sctp_remove_laddr(struct sctp_laddr *laddr) { /* remove from the list */ LIST_REMOVE(laddr, sctp_nxt_addr); sctp_free_ifa(laddr->ifa); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); SCTP_DECR_LADDR_COUNT(); } /* * Remove an address from the TCB local address list */ int sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) { struct sctp_inpcb *inp; struct sctp_laddr *laddr; /* * This is called by asconf work. It is assumed that a) The TCB is * locked and b) The INP is locked. This is true in as much as I can * trace through the entry asconf code where I did these locks. * Again, the ASCONF code is a bit different in that it does lock * the INP during its work often times. This must be since we don't * want other proc's looking up things while what they are looking * up is changing :-D */ inp = stcb->sctp_ep; /* if subset bound and don't allow ASCONF's, can't delete last */ if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) { if (stcb->asoc.numnets < 2) { /* can't delete last address */ return (-1); } } LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { /* remove the address if it exists */ if (laddr->ifa == NULL) continue; if (laddr->ifa == ifa) { sctp_remove_laddr(laddr); return (0); } } /* address not found! */ return (-1); } static char sctp_pcb_initialized = 0; /* * Temporarily remove for __APPLE__ until we use the Tiger equivalents */ /* sysctl */ static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; void sctp_pcb_init() { /* * SCTP initialization for the PCB structures should be called by * the sctp_init() funciton. */ int i; if (sctp_pcb_initialized != 0) { /* error I was called twice */ return; } sctp_pcb_initialized = 1; bzero(&sctpstat, sizeof(struct sctpstat)); SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); /* init the empty list of (All) Endpoints */ LIST_INIT(&sctppcbinfo.listhead); /* init the iterator head */ TAILQ_INIT(&sctppcbinfo.iteratorhead); /* init the hash table of endpoints */ TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), &sctppcbinfo.hashasocmark); sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, &sctppcbinfo.hashmark); sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, &sctppcbinfo.hashtcpmark); sctppcbinfo.hashtblsize = sctp_hashtblsize; /* init the small hash table we use to track restarted asoc's */ sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &sctppcbinfo.hashrestartmark); sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, &sctppcbinfo.hashvrfmark); /* init the zones */ /* * FIX ME: Should check for NULL returns, but if it does fail we are * doomed to panic anyways... add later maybe. */ SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", sizeof(struct sctp_inpcb), maxsockets); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", sizeof(struct sctp_tcb), sctp_max_number_of_assoc); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", sizeof(struct sctp_laddr), (sctp_max_number_of_assoc * sctp_scale_up_for_address)); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", sizeof(struct sctp_nets), (sctp_max_number_of_assoc * sctp_scale_up_for_address)); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", sizeof(struct sctp_tmit_chunk), (sctp_max_number_of_assoc * sctp_chunkscale)); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", sizeof(struct sctp_queued_to_read), (sctp_max_number_of_assoc * sctp_chunkscale)); SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", sizeof(struct sctp_stream_queue_pending), (sctp_max_number_of_assoc * sctp_chunkscale)); /* Master Lock INIT for info structure */ SCTP_INP_INFO_LOCK_INIT(); SCTP_STATLOG_INIT_LOCK(); SCTP_ITERATOR_LOCK_INIT(); SCTP_IPI_COUNT_INIT(); SCTP_IPI_ADDR_INIT(); SCTP_IPI_ITERATOR_WQ_INIT(); LIST_INIT(&sctppcbinfo.addr_wq); /* not sure if we need all the counts */ sctppcbinfo.ipi_count_ep = 0; /* assoc/tcb zone info */ sctppcbinfo.ipi_count_asoc = 0; /* local addrlist zone info */ sctppcbinfo.ipi_count_laddr = 0; /* remote addrlist zone info */ sctppcbinfo.ipi_count_raddr = 0; /* chunk info */ sctppcbinfo.ipi_count_chunk = 0; /* socket queue zone info */ sctppcbinfo.ipi_count_readq = 0; /* stream out queue cont */ sctppcbinfo.ipi_count_strmoq = 0; sctppcbinfo.ipi_free_strmoq = 0; sctppcbinfo.ipi_free_chunks = 0; SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); /* Init the TIMEWAIT list */ for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { LIST_INIT(&sctppcbinfo.vtag_timewait[i]); } #if defined(SCTP_USE_THREAD_BASED_ITERATOR) sctppcbinfo.iterator_running = 0; sctp_startup_iterator(); #endif /* * INIT the default VRF which for BSD is the only one, other O/S's * may have more. But initially they must start with one and then * add the VRF's as addresses are added. */ sctp_init_vrf_list(SCTP_DEFAULT_VRF); } int sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, int iphlen, int offset, int limit, struct sctphdr *sh, struct sockaddr *altsa) { /* * grub through the INIT pulling addresses and loading them to the * nets structure in the asoc. The from address in the mbuf should * also be loaded (if it is not already). This routine can be called * with either INIT or INIT-ACK's as long as the m points to the IP * packet and the offset points to the beginning of the parameters. */ struct sctp_inpcb *inp, *l_inp; struct sctp_nets *net, *net_tmp; struct ip *iph; struct sctp_paramhdr *phdr, parm_buf; struct sctp_tcb *stcb_tmp; uint16_t ptype, plen; struct sockaddr *sa; struct sockaddr_storage dest_store; struct sockaddr *local_sa = (struct sockaddr *)&dest_store; struct sockaddr_in sin; struct sockaddr_in6 sin6; uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; struct sctp_auth_random *random = NULL; uint16_t random_len = 0; uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; struct sctp_auth_hmac_algo *hmacs = NULL; uint16_t hmacs_len = 0; uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; struct sctp_auth_chunk_list *chunks = NULL; uint16_t num_chunks = 0; sctp_key_t *new_key; uint32_t keylen; int got_random = 0, got_hmacs = 0, got_chklist = 0; /* First get the destination address setup too. */ memset(&sin, 0, sizeof(sin)); memset(&sin6, 0, sizeof(sin6)); sin.sin_family = AF_INET; sin.sin_len = sizeof(sin); sin.sin_port = stcb->rport; sin6.sin6_family = AF_INET6; sin6.sin6_len = sizeof(struct sockaddr_in6); sin6.sin6_port = stcb->rport; if (altsa == NULL) { iph = mtod(m, struct ip *); if (iph->ip_v == IPVERSION) { /* its IPv4 */ struct sockaddr_in *sin_2; sin_2 = (struct sockaddr_in *)(local_sa); memset(sin_2, 0, sizeof(sin)); sin_2->sin_family = AF_INET; sin_2->sin_len = sizeof(sin); sin_2->sin_port = sh->dest_port; sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; sin.sin_addr = iph->ip_src; sa = (struct sockaddr *)&sin; } else if (iph->ip_v == (IPV6_VERSION >> 4)) { /* its IPv6 */ struct ip6_hdr *ip6; struct sockaddr_in6 *sin6_2; ip6 = mtod(m, struct ip6_hdr *); sin6_2 = (struct sockaddr_in6 *)(local_sa); memset(sin6_2, 0, sizeof(sin6)); sin6_2->sin6_family = AF_INET6; sin6_2->sin6_len = sizeof(struct sockaddr_in6); sin6_2->sin6_port = sh->dest_port; sin6.sin6_addr = ip6->ip6_src; sa = (struct sockaddr *)&sin6; } else { sa = NULL; } } else { /* * For cookies we use the src address NOT from the packet * but from the original INIT */ sa = altsa; } /* Turn off ECN until we get through all params */ stcb->asoc.ecn_allowed = 0; TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { /* mark all addresses that we have currently on the list */ net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; } /* does the source address already exist? if so skip it */ l_inp = inp = stcb->sctp_ep; atomic_add_int(&stcb->asoc.refcnt, 1); stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); atomic_add_int(&stcb->asoc.refcnt, -1); if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { /* we must add the source address */ /* no scope set here since we have a tcb already. */ if ((sa->sa_family == AF_INET) && (stcb->asoc.ipv4_addr_legal)) { if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { return (-1); } } else if ((sa->sa_family == AF_INET6) && (stcb->asoc.ipv6_addr_legal)) { if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { return (-2); } } } else { if (net_tmp != NULL && stcb_tmp == stcb) { net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; } else if (stcb_tmp != stcb) { /* It belongs to another association? */ SCTP_TCB_UNLOCK(stcb_tmp); return (-3); } } if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-4); } /* now we must go through each of the params. */ phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); while (phdr) { ptype = ntohs(phdr->param_type); plen = ntohs(phdr->param_length); /* * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, * (int)plen); */ if (offset + plen > limit) { break; } if (plen == 0) { break; } if (ptype == SCTP_IPV4_ADDRESS) { if (stcb->asoc.ipv4_addr_legal) { struct sctp_ipv4addr_param *p4, p4_buf; /* ok get the v4 address and check/add */ phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); if (plen != sizeof(struct sctp_ipv4addr_param) || phdr == NULL) { return (-5); } p4 = (struct sctp_ipv4addr_param *)phdr; sin.sin_addr.s_addr = p4->addr; sa = (struct sockaddr *)&sin; inp = stcb->sctp_ep; atomic_add_int(&stcb->asoc.refcnt, 1); stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, local_sa, stcb); atomic_add_int(&stcb->asoc.refcnt, -1); if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { /* we must add the source address */ /* * no scope set since we have a tcb * already */ /* * we must validate the state again * here */ if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-7); } if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { return (-8); } } else if (stcb_tmp == stcb) { if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-10); } if (net != NULL) { /* clear flag */ net->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; } } else { /* * strange, address is in another * assoc? straighten out locks. */ if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-12); } return (-13); } } } else if (ptype == SCTP_IPV6_ADDRESS) { if (stcb->asoc.ipv6_addr_legal) { /* ok get the v6 address and check/add */ struct sctp_ipv6addr_param *p6, p6_buf; phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); if (plen != sizeof(struct sctp_ipv6addr_param) || phdr == NULL) { return (-14); } p6 = (struct sctp_ipv6addr_param *)phdr; memcpy((caddr_t)&sin6.sin6_addr, p6->addr, sizeof(p6->addr)); sa = (struct sockaddr *)&sin6; inp = stcb->sctp_ep; atomic_add_int(&stcb->asoc.refcnt, 1); stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, local_sa, stcb); atomic_add_int(&stcb->asoc.refcnt, -1); if (stcb_tmp == NULL && (inp == stcb->sctp_ep || inp == NULL)) { /* * we must validate the state again * here */ if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-16); } /* * we must add the address, no scope * set */ if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { return (-17); } } else if (stcb_tmp == stcb) { /* * we must validate the state again * here */ if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-19); } if (net != NULL) { /* clear flag */ net->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; } } else { /* * strange, address is in another * assoc? straighten out locks. */ if (stcb->asoc.state == 0) { /* the assoc was freed? */ return (-21); } return (-22); } } } else if (ptype == SCTP_ECN_CAPABLE) { stcb->asoc.ecn_allowed = 1; } else if (ptype == SCTP_ULP_ADAPTATION) { if (stcb->asoc.state != SCTP_STATE_OPEN) { struct sctp_adaptation_layer_indication ai, *aip; phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&ai, sizeof(ai)); aip = (struct sctp_adaptation_layer_indication *)phdr; sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, stcb, ntohl(aip->indication), NULL); } } else if (ptype == SCTP_SET_PRIM_ADDR) { struct sctp_asconf_addr_param lstore, *fee; struct sctp_asconf_addrv4_param *fii; int lptype; struct sockaddr *lsa = NULL; stcb->asoc.peer_supports_asconf = 1; if (plen > sizeof(lstore)) { return (-23); } phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&lstore, plen); if (phdr == NULL) { return (-24); } fee = (struct sctp_asconf_addr_param *)phdr; lptype = ntohs(fee->addrp.ph.param_type); if (lptype == SCTP_IPV4_ADDRESS) { if (plen != sizeof(struct sctp_asconf_addrv4_param)) { printf("Sizeof setprim in init/init ack not %d but %d - ignored\n", (int)sizeof(struct sctp_asconf_addrv4_param), plen); } else { fii = (struct sctp_asconf_addrv4_param *)fee; sin.sin_addr.s_addr = fii->addrp.addr; lsa = (struct sockaddr *)&sin; } } else if (lptype == SCTP_IPV6_ADDRESS) { if (plen != sizeof(struct sctp_asconf_addr_param)) { printf("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", (int)sizeof(struct sctp_asconf_addr_param), plen); } else { memcpy(sin6.sin6_addr.s6_addr, fee->addrp.addr, sizeof(fee->addrp.addr)); lsa = (struct sockaddr *)&sin6; } } if (lsa) { sctp_set_primary_addr(stcb, sa, NULL); } } else if (ptype == SCTP_PRSCTP_SUPPORTED) { /* Peer supports pr-sctp */ stcb->asoc.peer_supports_prsctp = 1; } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { /* A supported extension chunk */ struct sctp_supported_chunk_types_param *pr_supported; uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; int num_ent, i; phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&local_store, plen); if (phdr == NULL) { return (-25); } stcb->asoc.peer_supports_asconf = 0; stcb->asoc.peer_supports_prsctp = 0; stcb->asoc.peer_supports_pktdrop = 0; stcb->asoc.peer_supports_strreset = 0; stcb->asoc.peer_supports_auth = 0; pr_supported = (struct sctp_supported_chunk_types_param *)phdr; num_ent = plen - sizeof(struct sctp_paramhdr); for (i = 0; i < num_ent; i++) { switch (pr_supported->chunk_types[i]) { case SCTP_ASCONF: case SCTP_ASCONF_ACK: stcb->asoc.peer_supports_asconf = 1; break; case SCTP_FORWARD_CUM_TSN: stcb->asoc.peer_supports_prsctp = 1; break; case SCTP_PACKET_DROPPED: stcb->asoc.peer_supports_pktdrop = 1; break; case SCTP_STREAM_RESET: stcb->asoc.peer_supports_strreset = 1; break; case SCTP_AUTHENTICATION: stcb->asoc.peer_supports_auth = 1; break; default: /* one I have not learned yet */ break; } } } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { /* Peer supports ECN-nonce */ stcb->asoc.peer_supports_ecn_nonce = 1; stcb->asoc.ecn_nonce_allowed = 1; } else if (ptype == SCTP_RANDOM) { if (plen > sizeof(random_store)) break; if (got_random) { /* already processed a RANDOM */ goto next_param; } phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)random_store, plen); if (phdr == NULL) return (-26); random = (struct sctp_auth_random *)phdr; random_len = plen - sizeof(*random); /* enforce the random length */ if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_AUTH1) printf("SCTP: invalid RANDOM len\n"); #endif return (-27); } got_random = 1; } else if (ptype == SCTP_HMAC_LIST) { int num_hmacs; int i; if (plen > sizeof(hmacs_store)) break; if (got_hmacs) { /* already processed a HMAC list */ goto next_param; } phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)hmacs_store, plen); if (phdr == NULL) return (-28); hmacs = (struct sctp_auth_hmac_algo *)phdr; hmacs_len = plen - sizeof(*hmacs); num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); /* validate the hmac list */ if (sctp_verify_hmac_param(hmacs, num_hmacs)) { return (-29); } if (stcb->asoc.peer_hmacs != NULL) sctp_free_hmaclist(stcb->asoc.peer_hmacs); stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); if (stcb->asoc.peer_hmacs != NULL) { for (i = 0; i < num_hmacs; i++) { sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, ntohs(hmacs->hmac_ids[i])); } } got_hmacs = 1; } else if (ptype == SCTP_CHUNK_LIST) { int i; if (plen > sizeof(chunks_store)) break; if (got_chklist) { /* already processed a Chunks list */ goto next_param; } phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)chunks_store, plen); if (phdr == NULL) return (-30); chunks = (struct sctp_auth_chunk_list *)phdr; num_chunks = plen - sizeof(*chunks); if (stcb->asoc.peer_auth_chunks != NULL) sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); else stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); for (i = 0; i < num_chunks; i++) { sctp_auth_add_chunk(chunks->chunk_types[i], stcb->asoc.peer_auth_chunks); } got_chklist = 1; } else if ((ptype == SCTP_HEARTBEAT_INFO) || (ptype == SCTP_STATE_COOKIE) || (ptype == SCTP_UNRECOG_PARAM) || (ptype == SCTP_COOKIE_PRESERVE) || (ptype == SCTP_SUPPORTED_ADDRTYPE) || (ptype == SCTP_ADD_IP_ADDRESS) || (ptype == SCTP_DEL_IP_ADDRESS) || (ptype == SCTP_ERROR_CAUSE_IND) || (ptype == SCTP_SUCCESS_REPORT)) { /* don't care */ ; } else { if ((ptype & 0x8000) == 0x0000) { /* * must stop processing the rest of the * param's. Any report bits were handled * with the call to * sctp_arethere_unrecognized_parameters() * when the INIT or INIT-ACK was first seen. */ break; } } next_param: offset += SCTP_SIZE32(plen); if (offset >= limit) { break; } phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); } /* Now check to see if we need to purge any addresses */ for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { net_tmp = TAILQ_NEXT(net, sctp_next); if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == SCTP_ADDR_NOT_IN_ASSOC) { /* This address has been removed from the asoc */ /* remove and free it */ stcb->asoc.numnets--; TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); sctp_free_remote_addr(net); if (net == stcb->asoc.primary_destination) { stcb->asoc.primary_destination = NULL; sctp_select_primary_destination(stcb); } } } /* validate authentication required parameters */ if (got_random && got_hmacs) { stcb->asoc.peer_supports_auth = 1; } else { stcb->asoc.peer_supports_auth = 0; } if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && !stcb->asoc.peer_supports_auth) { return (-31); } /* concatenate the full random key */ #ifdef SCTP_AUTH_DRAFT_04 keylen = random_len; new_key = sctp_alloc_key(keylen); if (new_key != NULL) { /* copy in the RANDOM */ if (random != NULL) bcopy(random->random_data, new_key->key, random_len); } #else keylen = sizeof(*random) + random_len + sizeof(*chunks) + num_chunks + sizeof(*hmacs) + hmacs_len; new_key = sctp_alloc_key(keylen); if (new_key != NULL) { /* copy in the RANDOM */ if (random != NULL) { keylen = sizeof(*random) + random_len; bcopy(random, new_key->key, keylen); } /* append in the AUTH chunks */ if (chunks != NULL) { bcopy(chunks, new_key->key + keylen, sizeof(*chunks) + num_chunks); keylen += sizeof(*chunks) + num_chunks; } /* append in the HMACs */ if (hmacs != NULL) { bcopy(hmacs, new_key->key + keylen, sizeof(*hmacs) + hmacs_len); } } #endif else { return (-32); } if (stcb->asoc.authinfo.peer_random != NULL) sctp_free_key(stcb->asoc.authinfo.peer_random); stcb->asoc.authinfo.peer_random = new_key; #ifdef SCTP_AUTH_DRAFT_04 /* don't include the chunks and hmacs for draft -04 */ stcb->asoc.authinfo.peer_random->keylen = random_len; #endif sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); return (0); } int sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, struct sctp_nets *net) { /* make sure the requested primary address exists in the assoc */ if (net == NULL && sa) net = sctp_findnet(stcb, sa); if (net == NULL) { /* didn't find the requested primary address! */ return (-1); } else { /* set the primary address */ if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { /* Must be confirmed, so queue to set */ net->dest_state |= SCTP_ADDR_REQ_PRIMARY; return (0); } stcb->asoc.primary_destination = net; net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; net = TAILQ_FIRST(&stcb->asoc.nets); if (net != stcb->asoc.primary_destination) { /* * first one on the list is NOT the primary * sctp_cmpaddr() is much more efficent if the * primary is the first on the list, make it so. */ TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); } return (0); } } int sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) { /* * This function serves two purposes. It will see if a TAG can be * re-used and return 1 for yes it is ok and 0 for don't use that * tag. A secondary function it will do is purge out old tags that * can be removed. */ struct sctpasochead *head; struct sctpvtaghead *chain; struct sctp_tagblock *twait_block; struct sctp_tcb *stcb; int i; SCTP_INP_INFO_WLOCK(); chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; /* First is the vtag in use ? */ head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, sctppcbinfo.hashasocmark)]; if (head == NULL) { goto check_restart; } LIST_FOREACH(stcb, head, sctp_asocs) { if (stcb->asoc.my_vtag == tag) { /* * We should remove this if and return 0 always if * we want vtags unique across all endpoints. For * now within a endpoint is ok. */ if (inp == stcb->sctp_ep) { /* bad tag, in use */ SCTP_INP_INFO_WUNLOCK(); return (0); } } } check_restart: /* Now lets check the restart hash */ head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, sctppcbinfo.hashrestartmark)]; if (head == NULL) { goto check_time_wait; } LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { if (stcb->asoc.assoc_id == tag) { /* candidate */ if (inp == stcb->sctp_ep) { /* bad tag, in use */ SCTP_INP_INFO_WUNLOCK(); return (0); } } } check_time_wait: /* Now what about timed wait ? */ if (!SCTP_LIST_EMPTY(chain)) { /* * Block(s) are present, lets see if we have this tag in the * list */ LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { if (twait_block->vtag_block[i].v_tag == 0) { /* not used */ continue; } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > now->tv_sec) { /* Audit expires this guy */ twait_block->vtag_block[i].tv_sec_at_expire = 0; twait_block->vtag_block[i].v_tag = 0; } else if (twait_block->vtag_block[i].v_tag == tag) { /* Bad tag, sorry :< */ SCTP_INP_INFO_WUNLOCK(); return (0); } } } } /* Not found, ok to use the tag */ SCTP_INP_INFO_WUNLOCK(); return (1); } static sctp_assoc_t reneged_asoc_ids[256]; static uint8_t reneged_at = 0; static void sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) { /* * We must hunt this association for MBUF's past the cumack (i.e. * out of order data that we can renege on). */ struct sctp_association *asoc; struct sctp_tmit_chunk *chk, *nchk; uint32_t cumulative_tsn_p1, tsn; struct sctp_queued_to_read *ctl, *nctl; int cnt, strmat, gap; /* We look for anything larger than the cum-ack + 1 */ SCTP_STAT_INCR(sctps_protocol_drain_calls); if (sctp_do_drain == 0) { return; } asoc = &stcb->asoc; if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { /* none we can reneg on. */ return; } SCTP_STAT_INCR(sctps_protocol_drains_done); cumulative_tsn_p1 = asoc->cumulative_tsn + 1; cnt = 0; /* First look in the re-assembly queue */ chk = TAILQ_FIRST(&asoc->reasmqueue); while (chk) { /* Get the next one */ nchk = TAILQ_NEXT(chk, sctp_next); if (compare_with_wrap(chk->rec.data.TSN_seq, cumulative_tsn_p1, MAX_TSN)) { /* Yep it is above cum-ack */ cnt++; tsn = chk->rec.data.TSN_seq; if (tsn >= asoc->mapping_array_base_tsn) { gap = tsn - asoc->mapping_array_base_tsn; } else { gap = (MAX_TSN - asoc->mapping_array_base_tsn) + tsn + 1; } asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); sctp_ucount_decr(asoc->cnt_on_reasm_queue); SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); if (chk->data) { sctp_m_freem(chk->data); chk->data = NULL; } sctp_free_remote_addr(chk->whoTo); sctp_free_a_chunk(stcb, chk); } chk = nchk; } /* Ok that was fun, now we will drain all the inbound streams? */ for (strmat = 0; strmat < asoc->streamincnt; strmat++) { ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); while (ctl) { nctl = TAILQ_NEXT(ctl, next); if (compare_with_wrap(ctl->sinfo_tsn, cumulative_tsn_p1, MAX_TSN)) { /* Yep it is above cum-ack */ cnt++; tsn = ctl->sinfo_tsn; if (tsn >= asoc->mapping_array_base_tsn) { gap = tsn - asoc->mapping_array_base_tsn; } else { gap = (MAX_TSN - asoc->mapping_array_base_tsn) + tsn + 1; } asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); sctp_ucount_decr(asoc->cnt_on_all_streams); SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); if (ctl->data) { sctp_m_freem(ctl->data); ctl->data = NULL; } sctp_free_remote_addr(ctl->whoFrom); SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); SCTP_DECR_READQ_COUNT(); } ctl = nctl; } } /* * Question, should we go through the delivery queue? The only * reason things are on here is the app not reading OR a p-d-api up. * An attacker COULD send enough in to initiate the PD-API and then * send a bunch of stuff to other streams... these would wind up on * the delivery queue.. and then we would not get to them. But in * order to do this I then have to back-track and un-deliver * sequence numbers in streams.. el-yucko. I think for now we will * NOT look at the delivery queue and leave it to be something to * consider later. An alternative would be to abort the P-D-API with * a notification and then deliver the data.... Or another method * might be to keep track of how many times the situation occurs and * if we see a possible attack underway just abort the association. */ #ifdef SCTP_DEBUG if (sctp_debug_on & SCTP_DEBUG_PCB1) { if (cnt) { printf("Freed %d chunks from reneg harvest\n", cnt); } } #endif /* SCTP_DEBUG */ if (cnt) { /* * Now do we need to find a new * asoc->highest_tsn_inside_map? */ if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; } else { gap = (MAX_TSN - asoc->mapping_array_base_tsn) + asoc->highest_tsn_inside_map + 1; } if (gap >= (asoc->mapping_array_size << 3)) { /* * Something bad happened or cum-ack and high were * behind the base, but if so earlier checks should * have found NO data... wierd... we will start at * end of mapping array. */ printf("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", (int)gap, (int)(asoc->mapping_array_size << 3), (int)asoc->highest_tsn_inside_map); gap = asoc->mapping_array_size << 3; } while (gap > 0) { if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { /* found the new highest */ asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; break; } gap--; } if (gap == 0) { /* Nothing left in map */ memset(asoc->mapping_array, 0, asoc->mapping_array_size); asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; asoc->highest_tsn_inside_map = asoc->cumulative_tsn; } asoc->last_revoke_count = cnt; SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); sctp_send_sack(stcb); sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); reneged_at++; } /* * Another issue, in un-setting the TSN's in the mapping array we * DID NOT adjust the higest_tsn marker. This will cause one of two * things to occur. It may cause us to do extra work in checking for * our mapping array movement. More importantly it may cause us to * SACK every datagram. This may not be a bad thing though since we * will recover once we get our cum-ack above and all this stuff we * dumped recovered. */ } void sctp_drain() { /* * We must walk the PCB lists for ALL associations here. The system * is LOW on MBUF's and needs help. This is where reneging will * occur. We really hope this does NOT happen! */ struct sctp_inpcb *inp; struct sctp_tcb *stcb; SCTP_INP_INFO_RLOCK(); LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { /* For each endpoint */ SCTP_INP_RLOCK(inp); LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { /* For each association */ SCTP_TCB_LOCK(stcb); sctp_drain_mbufs(inp, stcb); SCTP_TCB_UNLOCK(stcb); } SCTP_INP_RUNLOCK(inp); } SCTP_INP_INFO_RUNLOCK(); } /* * start a new iterator * iterates through all endpoints and associations based on the pcb_state * flags and asoc_state. "af" (mandatory) is executed for all matching * assocs and "ef" (optional) is executed when the iterator completes. * "inpf" (optional) is executed for each new endpoint as it is being * iterated through. */ int sctp_initiate_iterator(inp_func inpf, asoc_func af, inp_func inpe, uint32_t pcb_state, uint32_t pcb_features, uint32_t asoc_state, void *argp, uint32_t argi, end_func ef, struct sctp_inpcb *s_inp, uint8_t chunk_output_off) { struct sctp_iterator *it = NULL; if (af == NULL) { return (-1); } SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), "Iterator"); if (it == NULL) { return (ENOMEM); } memset(it, 0, sizeof(*it)); it->function_assoc = af; it->function_inp = inpf; if (inpf) it->done_current_ep = 0; else it->done_current_ep = 1; it->function_atend = ef; it->pointer = argp; it->val = argi; it->pcb_flags = pcb_state; it->pcb_features = pcb_features; it->asoc_state = asoc_state; it->function_inp_end = inpe; it->no_chunk_output = chunk_output_off; if (s_inp) { it->inp = s_inp; it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; } else { SCTP_INP_INFO_RLOCK(); it->inp = LIST_FIRST(&sctppcbinfo.listhead); SCTP_INP_INFO_RUNLOCK(); it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; } SCTP_IPI_ITERATOR_WQ_LOCK(); if (it->inp) SCTP_INP_INCR_REF(it->inp); TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); #if defined(SCTP_USE_THREAD_BASED_ITERATOR) if (sctppcbinfo.iterator_running == 0) { sctp_wakeup_iterator(); } SCTP_IPI_ITERATOR_WQ_UNLOCK(); #else if (it->inp) SCTP_INP_DECR_REF(it->inp); SCTP_IPI_ITERATOR_WQ_UNLOCK(); /* Init the timer */ SCTP_OS_TIMER_INIT(&it->tmr.timer); /* add to the list of all iterators */ sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, NULL, NULL); #endif return (0); }