diff options
Diffstat (limited to 'netwerk/sctp/src/netinet/sctp_pcb.c')
| -rw-r--r-- | netwerk/sctp/src/netinet/sctp_pcb.c | 8131 |
1 files changed, 8131 insertions, 0 deletions
diff --git a/netwerk/sctp/src/netinet/sctp_pcb.c b/netwerk/sctp/src/netinet/sctp_pcb.c new file mode 100644 index 0000000000..233ba5dbf3 --- /dev/null +++ b/netwerk/sctp/src/netinet/sctp_pcb.c @@ -0,0 +1,8131 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. + * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. + * Copyright (c) 2008-2012, by Michael Tuexen. 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. + */ + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); +#endif + +#include <netinet/sctp_os.h> +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/proc.h> +#endif +#include <netinet/sctp_var.h> +#include <netinet/sctp_sysctl.h> +#include <netinet/sctp_pcb.h> +#include <netinet/sctputil.h> +#include <netinet/sctp.h> +#include <netinet/sctp_header.h> +#include <netinet/sctp_asconf.h> +#include <netinet/sctp_output.h> +#include <netinet/sctp_timer.h> +#include <netinet/sctp_bsd_addr.h> +#if defined(INET) || defined(INET6) +#if !defined(_WIN32) +#include <netinet/udp.h> +#endif +#endif +#ifdef INET6 +#if defined(__Userspace__) +#include "user_ip6_var.h" +#else +#include <netinet6/ip6_var.h> +#endif +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) +#include <sys/sched.h> +#include <sys/smp.h> +#include <sys/unistd.h> +#endif +#if defined(__Userspace__) +#include <user_socketvar.h> +#include <user_atomic.h> +#if !defined(_WIN32) +#include <netdb.h> +#endif +#endif + +#if !defined(__FreeBSD__) || defined(__Userspace__) +struct sctp_base_info system_base_info; + +#endif +/* FIX: we don't handle multiple link local scopes */ +/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ +#ifdef INET6 +int +SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) +{ +#ifdef SCTP_EMBEDDED_V6_SCOPE +#if defined(__APPLE__) && !defined(__Userspace__) + struct in6_addr tmp_a, tmp_b; + + tmp_a = a->sin6_addr; +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&tmp_a, a, NULL, NULL) != 0) { +#else + if (in6_embedscope(&tmp_a, a, NULL, NULL, NULL) != 0) { +#endif + return (0); + } + tmp_b = b->sin6_addr; +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&tmp_b, b, NULL, NULL) != 0) { +#else + if (in6_embedscope(&tmp_b, b, NULL, NULL, NULL) != 0) { +#endif + return (0); + } + return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b)); +#elif defined(SCTP_KAME) + struct sockaddr_in6 tmp_a, tmp_b; + + memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); + if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { + return (0); + } + memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); + if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { + return (0); + } + return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); +#else + struct in6_addr tmp_a, tmp_b; + + tmp_a = a->sin6_addr; + if (in6_embedscope(&tmp_a, a) != 0) { + return (0); + } + tmp_b = b->sin6_addr; + if (in6_embedscope(&tmp_b, b) != 0) { + return (0); + } + return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b)); +#endif +#else + return (IN6_ARE_ADDR_EQUAL(&(a->sin6_addr), &(b->sin6_addr))); +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +} +#endif + +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 = SCTP_BASE_INFO(ipi_count_ep); + spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); + spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); + spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); + spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); + spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); + spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); + spcb->free_chunks = SCTP_BASE_INFO(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 separate 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 vrf_id) +{ + struct sctp_vrf *vrf = NULL; + struct sctp_vrflist *bucket; + + /* First allocate the VRF structure */ + vrf = sctp_find_vrf(vrf_id); + if (vrf) { + /* Already allocated */ + return (vrf); + } + SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), + SCTP_M_VRF); + if (vrf == NULL) { + /* No memory */ +#ifdef INVARIANTS + panic("No memory for VRF:%d", vrf_id); +#endif + return (NULL); + } + /* setup the VRF */ + memset(vrf, 0, sizeof(struct sctp_vrf)); + vrf->vrf_id = vrf_id; + LIST_INIT(&vrf->ifnlist); + vrf->total_ifa_count = 0; + vrf->refcount = 0; + /* now also setup table ids */ + SCTP_INIT_VRF_TABLEID(vrf); + /* Init the HASH of addresses */ + vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, + &vrf->vrf_addr_hashmark); + if (vrf->vrf_addr_hash == NULL) { + /* No memory */ +#ifdef INVARIANTS + panic("No memory for VRF:%d", vrf_id); +#endif + SCTP_FREE(vrf, SCTP_M_VRF); + return (NULL); + } + + /* Add it to the hash table */ + bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; + LIST_INSERT_HEAD(bucket, vrf, next_vrf); + atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); + return (vrf); +} + +struct sctp_ifn * +sctp_find_ifn(void *ifn, uint32_t ifn_index) +{ + struct sctp_ifn *sctp_ifnp; + struct sctp_ifnlist *hash_ifn_head; + + /* We assume the lock is held for the addresses + * if that's wrong problems could occur :-) + */ + SCTP_IPI_ADDR_LOCK_ASSERT(); + hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; + LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { + 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 vrf_id) +{ + struct sctp_vrflist *bucket; + struct sctp_vrf *liste; + + bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; + LIST_FOREACH(liste, bucket, next_vrf) { + if (vrf_id == liste->vrf_id) { + return (liste); + } + } + return (NULL); +} + +void +sctp_free_vrf(struct sctp_vrf *vrf) +{ + if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { + if (vrf->vrf_addr_hash) { + SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); + vrf->vrf_addr_hash = NULL; + } + /* We zero'd the count */ + LIST_REMOVE(vrf, next_vrf); + SCTP_FREE(vrf, SCTP_M_VRF); + atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); + } +} + +void +sctp_free_ifn(struct sctp_ifn *sctp_ifnp) +{ + if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { + /* We zero'd the count */ + if (sctp_ifnp->vrf) { + sctp_free_vrf(sctp_ifnp->vrf); + } + SCTP_FREE(sctp_ifnp, SCTP_M_IFN); + atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); + } +} + +void +sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) +{ + struct sctp_ifn *sctp_ifnp; + + sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); + if (sctp_ifnp != NULL) { + sctp_ifnp->ifn_mtu = mtu; + } +} + +void +sctp_free_ifa(struct sctp_ifa *sctp_ifap) +{ + if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { + /* We zero'd the count */ + if (sctp_ifap->ifn_p) { + sctp_free_ifn(sctp_ifap->ifn_p); + } + SCTP_FREE(sctp_ifap, SCTP_M_IFA); + atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); + } +} + +static void +sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) +{ + struct sctp_ifn *found; + + found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); + if (found == NULL) { + /* Not in the list.. sorry */ + return; + } + if (hold_addr_lock == 0) { + SCTP_IPI_ADDR_WLOCK(); + } else { + SCTP_IPI_ADDR_WLOCK_ASSERT(); + } + LIST_REMOVE(sctp_ifnp, next_bucket); + LIST_REMOVE(sctp_ifnp, next_ifn); + if (hold_addr_lock == 0) { + SCTP_IPI_ADDR_WUNLOCK(); + } + /* Take away the reference, and possibly free it */ + sctp_free_ifn(sctp_ifnp); +} + +void +sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, + const char *if_name, uint32_t ifn_index) +{ + struct sctp_vrf *vrf; + struct sctp_ifa *sctp_ifap; + + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); + goto out; + } + sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); + if (sctp_ifap == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); + goto out; + } + if (sctp_ifap->ifn_p == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); + goto out; + } + if (if_name) { + if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", + sctp_ifap->ifn_p->ifn_name, if_name); + goto out; + } + } else { + if (sctp_ifap->ifn_p->ifn_index != ifn_index) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", + sctp_ifap->ifn_p->ifn_index, ifn_index); + goto out; + } + } + + sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); + sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; + out: + SCTP_IPI_ADDR_RUNLOCK(); +} + +void +sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, + const char *if_name, uint32_t ifn_index) +{ + struct sctp_vrf *vrf; + struct sctp_ifa *sctp_ifap; + + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); + goto out; + } + sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); + if (sctp_ifap == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); + goto out; + } + if (sctp_ifap->ifn_p == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); + goto out; + } + if (if_name) { + if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", + sctp_ifap->ifn_p->ifn_name, if_name); + goto out; + } + } else { + if (sctp_ifap->ifn_p->ifn_index != ifn_index) { + SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", + sctp_ifap->ifn_p->ifn_index, ifn_index); + goto out; + } + } + + sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); + sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; + out: + SCTP_IPI_ADDR_RUNLOCK(); +} + +/*- + * Add an ifa to an ifn. + * Register the interface as necessary. + * NOTE: ADDR write lock MUST be held. + */ +static void +sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) +{ + int ifa_af; + + LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); + sctp_ifap->ifn_p = sctp_ifnp; + atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); + /* update address counts */ + sctp_ifnp->ifa_count++; + ifa_af = sctp_ifap->address.sa.sa_family; + switch (ifa_af) { +#ifdef INET + case AF_INET: + sctp_ifnp->num_v4++; + break; +#endif +#ifdef INET6 + case AF_INET6: + sctp_ifnp->num_v6++; + break; +#endif + default: + break; + } + if (sctp_ifnp->ifa_count == 1) { + /* register the new interface */ + sctp_ifnp->registered_af = ifa_af; + } +} + +/*- + * Remove an ifa from its ifn. + * If no more addresses exist, remove the ifn too. Otherwise, re-register + * the interface based on the remaining address families left. + * NOTE: ADDR write lock MUST be held. + */ +static void +sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) +{ + LIST_REMOVE(sctp_ifap, next_ifa); + if (sctp_ifap->ifn_p) { + /* update address counts */ + sctp_ifap->ifn_p->ifa_count--; + switch (sctp_ifap->address.sa.sa_family) { +#ifdef INET + case AF_INET: + sctp_ifap->ifn_p->num_v4--; + break; +#endif +#ifdef INET6 + case AF_INET6: + sctp_ifap->ifn_p->num_v6--; + break; +#endif + default: + break; + } + + if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { + /* remove the ifn, possibly freeing it */ + sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); + } else { + /* re-register address family type, if needed */ + if ((sctp_ifap->ifn_p->num_v6 == 0) && + (sctp_ifap->ifn_p->registered_af == AF_INET6)) { + sctp_ifap->ifn_p->registered_af = AF_INET; + } else if ((sctp_ifap->ifn_p->num_v4 == 0) && + (sctp_ifap->ifn_p->registered_af == AF_INET)) { + sctp_ifap->ifn_p->registered_af = AF_INET6; + } + /* free the ifn refcount */ + sctp_free_ifn(sctp_ifap->ifn_p); + } + sctp_ifap->ifn_p = NULL; + } +} + +struct sctp_ifa * +sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, + uint32_t ifn_type, const char *if_name, void *ifa, + struct sockaddr *addr, uint32_t ifa_flags, + int dynamic_add) +{ + struct sctp_vrf *vrf; + struct sctp_ifn *sctp_ifnp, *new_sctp_ifnp; + struct sctp_ifa *sctp_ifap, *new_sctp_ifap; + struct sctp_ifalist *hash_addr_head; + struct sctp_ifnlist *hash_ifn_head; + uint32_t hash_of_addr; + int new_ifn_af = 0; + +#ifdef SCTP_DEBUG + SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); + SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); +#endif + SCTP_MALLOC(new_sctp_ifnp, struct sctp_ifn *, + sizeof(struct sctp_ifn), SCTP_M_IFN); + if (new_sctp_ifnp == NULL) { +#ifdef INVARIANTS + panic("No memory for IFN"); +#endif + return (NULL); + } + SCTP_MALLOC(new_sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); + if (new_sctp_ifap == NULL) { +#ifdef INVARIANTS + panic("No memory for IFA"); +#endif + SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); + return (NULL); + } + + SCTP_IPI_ADDR_WLOCK(); + sctp_ifnp = sctp_find_ifn(ifn, ifn_index); + if (sctp_ifnp) { + vrf = sctp_ifnp->vrf; + } else { + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + vrf = sctp_allocate_vrf(vrf_id); + if (vrf == NULL) { + SCTP_IPI_ADDR_WUNLOCK(); + SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); + SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); + return (NULL); + } + } + } + if (sctp_ifnp == NULL) { + /* build one and add it, can't hold lock + * until after malloc done though. + */ + sctp_ifnp = new_sctp_ifnp; + new_sctp_ifnp = NULL; + memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); + sctp_ifnp->ifn_index = ifn_index; + sctp_ifnp->ifn_p = ifn; + sctp_ifnp->ifn_type = ifn_type; + sctp_ifnp->refcount = 0; + sctp_ifnp->vrf = vrf; + atomic_add_int(&vrf->refcount, 1); + sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index); + if (if_name != NULL) { + SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); + } else { + SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); + } + hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; + LIST_INIT(&sctp_ifnp->ifalist); + LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); + LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); + atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); + new_ifn_af = 1; + } + sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); + if (sctp_ifap) { + /* Hmm, it already exists? */ + if ((sctp_ifap->ifn_p) && + (sctp_ifap->ifn_p->ifn_index == ifn_index)) { + SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", + sctp_ifap->ifn_p->ifn_name, ifn_index, + (void *)sctp_ifap); + if (new_ifn_af) { + /* Remove the created one that we don't want */ + sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); + } + if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { + /* easy to solve, just switch back to active */ + SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); + sctp_ifap->localifa_flags = SCTP_ADDR_VALID; + sctp_ifap->ifn_p = sctp_ifnp; + atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); + } + exit_stage_left: + SCTP_IPI_ADDR_WUNLOCK(); + if (new_sctp_ifnp != NULL) { + SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); + } + SCTP_FREE(new_sctp_ifap, SCTP_M_IFA); + return (sctp_ifap); + } else { + if (sctp_ifap->ifn_p) { + /* + * The last IFN gets the address, remove the + * old one + */ + SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", + (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, + sctp_ifap->ifn_p->ifn_index, if_name, + ifn_index); + /* remove the address from the old ifn */ + sctp_remove_ifa_from_ifn(sctp_ifap); + /* move the address over to the new ifn */ + sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); + goto exit_stage_left; + } else { + /* repair ifnp which was NULL ? */ + sctp_ifap->localifa_flags = SCTP_ADDR_VALID; + SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", + (void *)sctp_ifnp, (void *)sctp_ifap); + sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); + } + goto exit_stage_left; + } + } + sctp_ifap = new_sctp_ifap; + memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); + sctp_ifap->ifn_p = sctp_ifnp; + atomic_add_int(&sctp_ifnp->refcount, 1); + sctp_ifap->vrf_id = vrf_id; + sctp_ifap->ifa = ifa; +#ifdef HAVE_SA_LEN + memcpy(&sctp_ifap->address, addr, addr->sa_len); +#else + switch (addr->sa_family) { +#ifdef INET + case AF_INET: + memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in)); + break; +#endif +#ifdef INET6 + case AF_INET6: + memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_in6)); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + memcpy(&sctp_ifap->address, addr, sizeof(struct sockaddr_conn)); + break; +#endif + default: + /* TSNH */ + break; + } +#endif + sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; + sctp_ifap->flags = ifa_flags; + /* Set scope */ + switch (sctp_ifap->address.sa.sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + sin = &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; + } + sctp_ifnp->num_v4++; + if (new_ifn_af) + new_ifn_af = AF_INET; + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + /* ok to use deprecated addresses? */ + struct sockaddr_in6 *sin6; + + sin6 = &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; + } + sctp_ifnp->num_v6++; + if (new_ifn_af) + new_ifn_af = AF_INET6; + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + if (new_ifn_af) + new_ifn_af = AF_CONN; + break; +#endif + default: + new_ifn_af = 0; + break; + } + 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; + } + hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; + LIST_INSERT_HEAD(hash_addr_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++; + atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); + if (new_ifn_af) { + sctp_ifnp->registered_af = new_ifn_af; + } + SCTP_IPI_ADDR_WUNLOCK(); + if (new_sctp_ifnp != NULL) { + SCTP_FREE(new_sctp_ifnp, SCTP_M_IFN); + } + + if (dynamic_add) { + /* Bump up the refcount so that when the timer + * completes it will drop back down. + */ + struct sctp_laddr *wi; + + atomic_add_int(&sctp_ifap->refcount, 1); + wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); + if (wi == NULL) { + /* + * Gak, what can we do? We have lost an address + * change can you say HOSED? + */ + SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); + /* Opps, must decrement the count */ + sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, + if_name); + return (NULL); + } + SCTP_INCR_LADDR_COUNT(); + memset(wi, 0, sizeof(*wi)); + (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); + wi->ifa = sctp_ifap; + wi->action = SCTP_ADD_IP_ADDRESS; + + SCTP_WQ_ADDR_LOCK(); + LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); + sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, + (struct sctp_inpcb *)NULL, + (struct sctp_tcb *)NULL, + (struct sctp_nets *)NULL); + SCTP_WQ_ADDR_UNLOCK(); + } else { + /* it's ready for use */ + sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; + } + return (sctp_ifap); +} + +void +sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, + uint32_t ifn_index, const char *if_name) +{ + struct sctp_vrf *vrf; + struct sctp_ifa *sctp_ifap = NULL; + + SCTP_IPI_ADDR_WLOCK(); + vrf = sctp_find_vrf(vrf_id); + if (vrf == NULL) { + SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); + goto out_now; + } + +#ifdef SCTP_DEBUG + SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); + SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); +#endif + sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); + if (sctp_ifap) { + /* Validate the delete */ + if (sctp_ifap->ifn_p) { + int valid = 0; + /*- + * The name has priority over the ifn_index + * if its given. + */ + if (if_name) { + if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { + /* They match its a correct delete */ + valid = 1; + } + } + if (!valid) { + /* last ditch check ifn_index */ + if (ifn_index == sctp_ifap->ifn_p->ifn_index) { + valid = 1; + } + } + if (!valid) { + SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", + ifn_index, ((if_name == NULL) ? "NULL" : if_name)); + SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", + sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); + SCTP_IPI_ADDR_WUNLOCK(); + return; + } + } + SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); + sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; + /* + * We don't set the flag. This means that the structure will + * hang around in EP's that have bound specific to it until + * they close. This gives us TCP like behavior if someone + * removes an address (or for that matter adds it right back). + */ + /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ + vrf->total_ifa_count--; + LIST_REMOVE(sctp_ifap, next_bucket); + sctp_remove_ifa_from_ifn(sctp_ifap); + } +#ifdef SCTP_DEBUG + else { + SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", + ifn_index); + SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); + } +#endif + + out_now: + SCTP_IPI_ADDR_WUNLOCK(); + if (sctp_ifap) { + struct sctp_laddr *wi; + + wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); + if (wi == NULL) { + /* + * Gak, what can we do? We have lost an address + * change can you say HOSED? + */ + SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); + + /* Oops, must decrement the count */ + sctp_free_ifa(sctp_ifap); + return; + } + SCTP_INCR_LADDR_COUNT(); + memset(wi, 0, sizeof(*wi)); + (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); + wi->ifa = sctp_ifap; + wi->action = SCTP_DEL_IP_ADDRESS; + SCTP_WQ_ADDR_LOCK(); + /* + * Should this really be a tailq? As it is we will process the + * newest first :-0 + */ + LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); + sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, + (struct sctp_inpcb *)NULL, + (struct sctp_tcb *)NULL, + (struct sctp_nets *)NULL); + SCTP_WQ_ADDR_UNLOCK(); + } + return; +} + +static int +sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) +{ + int loopback_scope; +#if defined(INET) + int ipv4_local_scope, ipv4_addr_legal; +#endif +#if defined(INET6) + int local_scope, site_scope, ipv6_addr_legal; +#endif +#if defined(__Userspace__) + int conn_addr_legal; +#endif + struct sctp_vrf *vrf; + struct sctp_ifn *sctp_ifn; + struct sctp_ifa *sctp_ifa; + + loopback_scope = stcb->asoc.scope.loopback_scope; +#if defined(INET) + ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; + ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; +#endif +#if defined(INET6) + local_scope = stcb->asoc.scope.local_scope; + site_scope = stcb->asoc.scope.site_scope; + ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; +#endif +#if defined(__Userspace__) + conn_addr_legal = stcb->asoc.scope.conn_addr_legal; +#endif + + SCTP_IPI_ADDR_RLOCK(); + vrf = sctp_find_vrf(stcb->asoc.vrf_id); + if (vrf == NULL) { + /* no vrf, no addresses */ + SCTP_IPI_ADDR_RUNLOCK(); + return (0); + } + + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { + if ((loopback_scope == 0) && + SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { + continue; + } + LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { + if (sctp_is_addr_restricted(stcb, sctp_ifa) && + (!sctp_is_addr_pending(stcb, sctp_ifa))) { + /* We allow pending addresses, where we + * have sent an asconf-add to be considered + * valid. + */ + continue; + } + if (sctp_ifa->address.sa.sa_family != to->sa_family) { + continue; + } + switch (sctp_ifa->address.sa.sa_family) { +#ifdef INET + case AF_INET: + if (ipv4_addr_legal) { + struct sockaddr_in *sin, *rsin; + + sin = &sctp_ifa->address.sin; + rsin = (struct sockaddr_in *)to; + if ((ipv4_local_scope == 0) && + IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + continue; + } +#endif + if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (ipv6_addr_legal) { + struct sockaddr_in6 *sin6, *rsin6; +#if defined(SCTP_EMBEDDED_V6_SCOPE) && !defined(SCTP_KAME) + struct sockaddr_in6 lsa6; +#endif + sin6 = &sctp_ifa->address.sin6; + rsin6 = (struct sockaddr_in6 *)to; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + continue; + } +#endif + if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { + if (local_scope == 0) + continue; +#if defined(SCTP_EMBEDDED_V6_SCOPE) + if (sin6->sin6_scope_id == 0) { +#ifdef SCTP_KAME + if (sa6_recoverscope(sin6) != 0) + continue; +#else + lsa6 = *sin6; + if (in6_recoverscope(&lsa6, + &lsa6.sin6_addr, + NULL)) + continue; + sin6 = &lsa6; +#endif /* SCTP_KAME */ + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + } + if ((site_scope == 0) && + (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { + continue; + } + if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (conn_addr_legal) { + struct sockaddr_conn *sconn, *rsconn; + + sconn = &sctp_ifa->address.sconn; + rsconn = (struct sockaddr_conn *)to; + if (sconn->sconn_addr == rsconn->sconn_addr) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + } + break; +#endif + default: + /* TSNH */ + break; + } + } + } + } else { + struct sctp_laddr *laddr; + + LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { + SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); + continue; + } + if (sctp_is_addr_restricted(stcb, laddr->ifa) && + (!sctp_is_addr_pending(stcb, laddr->ifa))) { + /* We allow pending addresses, where we + * have sent an asconf-add to be considered + * valid. + */ + continue; + } + if (laddr->ifa->address.sa.sa_family != to->sa_family) { + continue; + } + switch (to->sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin, *rsin; + + sin = &laddr->ifa->address.sin; + rsin = (struct sockaddr_in *)to; + if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6, *rsin6; + + sin6 = &laddr->ifa->address.sin6; + rsin6 = (struct sockaddr_in6 *)to; + if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + break; + } + +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn, *rsconn; + + sconn = &laddr->ifa->address.sconn; + rsconn = (struct sockaddr_conn *)to; + if (sconn->sconn_addr == rsconn->sconn_addr) { + SCTP_IPI_ADDR_RUNLOCK(); + return (1); + } + break; + } +#endif + default: + /* TSNH */ + break; + } + } + } + SCTP_IPI_ADDR_RUNLOCK(); + return (0); +} + +static struct sctp_tcb * +sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, + struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) +{ + /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ + /* + * 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; +#ifdef SCTP_MVRF + int fnd, i; +#endif + + if ((to == NULL) || (from == NULL)) { + return (NULL); + } + + switch (to->sa_family) { +#ifdef INET + case AF_INET: + if (from->sa_family == AF_INET) { + lport = ((struct sockaddr_in *)to)->sin_port; + rport = ((struct sockaddr_in *)from)->sin_port; + } else { + return (NULL); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (from->sa_family == AF_INET6) { + lport = ((struct sockaddr_in6 *)to)->sin6_port; + rport = ((struct sockaddr_in6 *)from)->sin6_port; + } else { + return (NULL); + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (from->sa_family == AF_CONN) { + lport = ((struct sockaddr_conn *)to)->sconn_port; + rport = ((struct sockaddr_conn *)from)->sconn_port; + } else { + return (NULL); + } + break; +#endif + default: + return (NULL); + } + ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(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) { + SCTP_INP_RLOCK(inp); + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { + SCTP_INP_RUNLOCK(inp); + continue; + } + if (lport != inp->sctp_lport) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + switch (to->sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + sin = (struct sockaddr_in *)to; + if (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)to; + if (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } + break; + } +#endif + default: + SCTP_INP_RUNLOCK(inp); + continue; + } +#endif +#ifdef SCTP_MVRF + fnd = 0; + for (i = 0; i < inp->num_vrfs; i++) { + if (inp->m_vrf_ids[i] == vrf_id) { + fnd = 1; + break; + } + } + if (fnd == 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#else + if (inp->def_vrf_id != vrf_id) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#endif + /* 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) { + SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); + continue; + } + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { + SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); + continue; + } + if (laddr->ifa->address.sa.sa_family == + to->sa_family) { + /* see if it matches */ +#ifdef INET + if (from->sa_family == AF_INET) { + struct sockaddr_in *intf_addr, *sin; + + intf_addr = &laddr->ifa->address.sin; + sin = (struct sockaddr_in *)to; + if (sin->sin_addr.s_addr == + intf_addr->sin_addr.s_addr) { + match = 1; + break; + } + } +#endif +#ifdef INET6 + if (from->sa_family == AF_INET6) { + 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, + intf_addr6)) { + match = 1; + break; + } + } +#endif +#if defined(__Userspace__) + if (from->sa_family == AF_CONN) { + struct sockaddr_conn *intf_addr, *sconn; + + intf_addr = &laddr->ifa->address.sconn; + sconn = (struct sockaddr_conn *)to; + if (sconn->sconn_addr == + intf_addr->sconn_addr) { + match = 1; + break; + } + } +#endif + } + } + 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? + */ + /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ + stcb = LIST_FIRST(&inp->sctp_asoc_list); + if (stcb == NULL) { + SCTP_INP_RUNLOCK(inp); + continue; + } + SCTP_TCB_LOCK(stcb); + if (!sctp_does_stcb_own_this_addr(stcb, to)) { + SCTP_TCB_UNLOCK(stcb); + SCTP_INP_RUNLOCK(inp); + continue; + } + if (stcb->rport != rport) { + /* remote port does not match. */ + SCTP_TCB_UNLOCK(stcb); + SCTP_INP_RUNLOCK(inp); + continue; + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + SCTP_TCB_UNLOCK(stcb); + SCTP_INP_RUNLOCK(inp); + continue; + } + if (!sctp_does_stcb_own_this_addr(stcb, to)) { + 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; + } + switch (from->sa_family) { +#ifdef INET + case 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); + } + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6, *rsin6; + + sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; + rsin6 = (struct sockaddr_in6 *)from; + if (SCTP6_ARE_ADDR_EQUAL(sin6, + rsin6)) { + /* found it */ + if (netp != NULL) { + *netp = net; + } + /* Update the endpoint pointer */ + *inp_p = inp; + SCTP_INP_RUNLOCK(inp); + return (stcb); + } + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn, *rsconn; + + sconn = (struct sockaddr_conn *)&net->ro._l_addr; + rsconn = (struct sockaddr_conn *)from; + if (sconn->sconn_addr == rsconn->sconn_addr) { + /* found it */ + if (netp != NULL) { + *netp = net; + } + /* Update the endpoint pointer */ + *inp_p = inp; + SCTP_INP_RUNLOCK(inp); + return (stcb); + } + break; + } +#endif + default: + /* TSNH */ + break; + } + } + 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 = NULL; + struct sctp_nets *net; + uint16_t rport; + + inp = *inp_p; + switch (remote->sa_family) { +#ifdef INET + case AF_INET: + rport = (((struct sockaddr_in *)remote)->sin_port); + break; +#endif +#ifdef INET6 + case AF_INET6: + rport = (((struct sockaddr_in6 *)remote)->sin6_port); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + rport = (((struct sockaddr_conn *)remote)->sconn_port); + break; +#endif + default: + return (NULL); + } + if (locked_tcb) { + /* + * UN-lock so we can do proper locking here this occurs when + * called from load_addresses_from_init. + */ + atomic_add_int(&locked_tcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(locked_tcb); + } + SCTP_INP_INFO_RLOCK(); + if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || + (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { + /*- + * 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) && SCTP_IS_LISTENING(inp)) { + /* to is peer addr, from is my addr */ +#ifndef SCTP_MVRF + stcb = sctp_tcb_special_locate(inp_p, remote, local, + netp, inp->def_vrf_id); + if ((stcb != NULL) && (locked_tcb == NULL)) { + /* we have a locked tcb, lower refcount */ + SCTP_INP_DECR_REF(inp); + } + if ((locked_tcb != NULL) && (locked_tcb != stcb)) { + SCTP_INP_RLOCK(locked_tcb->sctp_ep); + SCTP_TCB_LOCK(locked_tcb); + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); + } +#else + /*- + * MVRF is tricky, we must look in every VRF + * the endpoint has. + */ + int i; + + for (i = 0; i < inp->num_vrfs; i++) { + stcb = sctp_tcb_special_locate(inp_p, remote, local, + netp, inp->m_vrf_ids[i]); + if ((stcb != NULL) && (locked_tcb == NULL)) { + /* we have a locked tcb, lower refcount */ + SCTP_INP_DECR_REF(inp); + break; + } + if ((locked_tcb != NULL) && (locked_tcb != stcb)) { + SCTP_INP_RLOCK(locked_tcb->sctp_ep); + SCTP_TCB_LOCK(locked_tcb); + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); + break; + } + } +#endif + 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; + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + SCTP_TCB_UNLOCK(stcb); + goto null_return; + } + if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { + 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; + } + switch (remote->sa_family) { +#ifdef INET + case 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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif +#ifdef INET6 + case 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, + rsin6)) { + /* 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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn, *rsconn; + + sconn = (struct sockaddr_conn *)&net->ro._l_addr; + rsconn = (struct sockaddr_conn *)remote; + if (sconn->sconn_addr == rsconn->sconn_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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif + default: + /* TSNH */ + break; + } + } + 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)]; + LIST_FOREACH(stcb, head, sctp_tcbhash) { + if (stcb->rport != rport) { + /* remote port does not match */ + continue; + } + SCTP_TCB_LOCK(stcb); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + SCTP_TCB_UNLOCK(stcb); + continue; + } + if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { + SCTP_TCB_UNLOCK(stcb); + continue; + } + /* 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; + } + switch (remote->sa_family) { +#ifdef INET + case 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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif +#ifdef INET6 + case 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, + rsin6)) { + /* 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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn, *rsconn; + + sconn = (struct sockaddr_conn *)&net->ro._l_addr; + rsconn = (struct sockaddr_conn *)remote; + if (sconn->sconn_addr == rsconn->sconn_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); + } + if (locked_tcb) { + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + break; + } +#endif + default: + /* TSNH */ + break; + } + } + SCTP_TCB_UNLOCK(stcb); + } + } +null_return: + /* clean up for returning null */ + if (locked_tcb) { + SCTP_TCB_LOCK(locked_tcb); + atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); + } + 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_findasoc_ep_asocid_locked(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 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { + SCTP_PRINTF("TSNH ep_associd0\n"); + return (NULL); + } + id = (uint32_t)asoc_id; + head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; + if (head == NULL) { + /* invalid id TSNH */ + SCTP_PRINTF("TSNH ep_associd1\n"); + return (NULL); + } + LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { + if (stcb->asoc.assoc_id == id) { + if (inp != stcb->sctp_ep) { + /* + * some other guy has the same id active (id + * collision ??). + */ + SCTP_PRINTF("TSNH ep_associd2\n"); + continue; + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + continue; + } + if (want_lock) { + SCTP_TCB_LOCK(stcb); + } + return (stcb); + } + } + return (NULL); +} + +struct sctp_tcb * +sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) +{ + struct sctp_tcb *stcb; + + SCTP_INP_RLOCK(inp); + stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); + SCTP_INP_RUNLOCK(inp); + return (stcb); +} + +/* + * Endpoint probe expects that the INP_INFO is locked. + */ +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 sctp_laddr *laddr; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; + struct sockaddr_in6 *intf_addr6; +#endif +#if defined(__Userspace__) + struct sockaddr_conn *sconn; +#endif +#ifdef SCTP_MVRF + int i; +#endif + int fnd; + +#ifdef INET + sin = NULL; +#endif +#ifdef INET6 + sin6 = NULL; +#endif +#if defined(__Userspace__) + sconn = NULL; +#endif + switch (nam->sa_family) { +#ifdef INET + case AF_INET: + sin = (struct sockaddr_in *)nam; + break; +#endif +#ifdef INET6 + case AF_INET6: + sin6 = (struct sockaddr_in6 *)nam; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + sconn = (struct sockaddr_conn *)nam; + break; +#endif + default: + /* 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 */ + switch (nam->sa_family) { +#ifdef INET + case AF_INET: + if ((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; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip4(inp->ip_inp.inp.inp_cred, + &sin->sin_addr) != 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#endif + break; +#endif +#ifdef INET6 + case AF_INET6: + /* A V6 address and the endpoint is NOT bound V6 */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (prison_check_ip6(inp->ip_inp.inp.inp_cred, + &sin6->sin6_addr) != 0) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#endif + break; +#endif + default: + break; + } + /* does a VRF id match? */ + fnd = 0; +#ifdef SCTP_MVRF + for (i = 0; i < inp->num_vrfs; i++) { + if (inp->m_vrf_ids[i] == vrf_id) { + fnd = 1; + break; + } + } +#else + if (inp->def_vrf_id == vrf_id) + fnd = 1; +#endif + + SCTP_INP_RUNLOCK(inp); + if (!fnd) + continue; + return (inp); + } + SCTP_INP_RUNLOCK(inp); + } + switch (nam->sa_family) { +#ifdef INET + case AF_INET: + if (sin->sin_addr.s_addr == INADDR_ANY) { + /* Can't hunt for one that has no address specified */ + return (NULL); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + /* Can't hunt for one that has no address specified */ + return (NULL); + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (sconn->sconn_addr == NULL) { + return (NULL); + } + break; +#endif + default: + break; + } + /* + * 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; +#ifdef SCTP_MVRF + for (i = 0; i < inp->num_vrfs; i++) { + if (inp->m_vrf_ids[i] == vrf_id) { + fnd = 1; + break; + } + } +#else + if (inp->def_vrf_id == vrf_id) + fnd = 1; + +#endif + if (!fnd) { + SCTP_INP_RUNLOCK(inp); + continue; + } + LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { + if (laddr->ifa == NULL) { + SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", + __func__); + continue; + } + SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", + (void *)laddr->ifa); + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { + SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); + continue; + } + if (laddr->ifa->address.sa.sa_family == nam->sa_family) { + /* possible, see if it matches */ + switch (nam->sa_family) { +#ifdef INET + case AF_INET: +#if defined(__APPLE__) && !defined(__Userspace__) + if (sin == NULL) { + /* TSNH */ + break; + } +#endif + if (sin->sin_addr.s_addr == + laddr->ifa->address.sin.sin_addr.s_addr) { + SCTP_INP_RUNLOCK(inp); + return (inp); + } + break; +#endif +#ifdef INET6 + case AF_INET6: + intf_addr6 = &laddr->ifa->address.sin6; + if (SCTP6_ARE_ADDR_EQUAL(sin6, + intf_addr6)) { + SCTP_INP_RUNLOCK(inp); + return (inp); + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (sconn->sconn_addr == laddr->ifa->address.sconn.sconn_addr) { + SCTP_INP_RUNLOCK(inp); + return (inp); + } + break; +#endif + } + } + } + SCTP_INP_RUNLOCK(inp); + } + return (NULL); +} + +static struct sctp_inpcb * +sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) +{ + struct sctppcbhead *head; + struct sctp_inpcb *t_inp; +#ifdef SCTP_MVRF + int i; +#endif + int fnd; + + head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, + SCTP_BASE_INFO(hashmark))]; + LIST_FOREACH(t_inp, head, sctp_hash) { + if (t_inp->sctp_lport != lport) { + continue; + } + /* is it in the VRF in question */ + fnd = 0; +#ifdef SCTP_MVRF + for (i = 0; i < inp->num_vrfs; i++) { + if (t_inp->m_vrf_ids[i] == vrf_id) { + fnd = 1; + break; + } + } +#else + if (t_inp->def_vrf_id == vrf_id) + fnd = 1; +#endif + 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 (t_inp); + } 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 (t_inp); + } else { + /* t_inp is bound only V4 */ + if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + SCTP_IPV6_V6ONLY(inp)) { + /* no conflict */ + continue; + } + /* else fall through to conflict */ + } + return (t_inp); + } + return (NULL); +} + +int +sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) +{ + /* For 1-2-1 with port reuse */ + struct sctppcbhead *head; + struct sctp_inpcb *tinp, *ninp; + + SCTP_INP_INFO_WLOCK_ASSERT(); + SCTP_INP_WLOCK_ASSERT(inp); + + if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { + /* only works with port reuse on */ + return (-1); + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { + return (0); + } + SCTP_INP_WUNLOCK(inp); + head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, + SCTP_BASE_INFO(hashmark))]; + /* Kick out all non-listeners to the TCP hash */ + LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { + if (tinp->sctp_lport != inp->sctp_lport) { + continue; + } + if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { + continue; + } + if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + continue; + } + if (SCTP_IS_LISTENING(tinp)) { + continue; + } + SCTP_INP_WLOCK(tinp); + LIST_REMOVE(tinp, sctp_hash); + head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; + tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; + LIST_INSERT_HEAD(head, tinp, sctp_hash); + SCTP_INP_WUNLOCK(tinp); + } + SCTP_INP_WLOCK(inp); + /* Pull from where he was */ + LIST_REMOVE(inp, sctp_hash); + inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; + head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; + LIST_INSERT_HEAD(head, inp, sctp_hash); + return (0); +} + +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; + int lport; + unsigned int i; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif +#if defined(__Userspace__) + struct sockaddr_conn *sconn; +#endif + + switch (nam->sa_family) { +#ifdef INET + case AF_INET: + sin = (struct sockaddr_in *)nam; + lport = sin->sin_port; + break; +#endif +#ifdef INET6 + case AF_INET6: + sin6 = (struct sockaddr_in6 *)nam; + lport = sin6->sin6_port; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + sconn = (struct sockaddr_conn *)nam; + lport = sconn->sconn_port; + break; +#endif + default: + 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 = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, + SCTP_BASE_INFO(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 still exists a connected socket for this + * guy. If so we can return the first one that we find. This may NOT + * be the correct one so the caller should be wary on the returned INP. + * Currently the only caller that sets find_tcp_pool is in bindx where + * we are verifying that a user CAN bind the address. He either + * has bound it already, or someone else has, or its open to bind, + * so this is good enough. + */ + if (inp == NULL && find_tcp_pool) { + for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { + head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; + inp = sctp_endpoint_probe(nam, head, lport, vrf_id); + if (inp) { + 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 *from, struct sockaddr *to, + struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, + uint32_t vrf_id) +{ + struct sctp_inpcb *inp = NULL; + struct sctp_tcb *stcb; + + SCTP_INP_INFO_RLOCK(); + if (find_tcp_pool) { + if (inp_p != NULL) { + stcb = sctp_tcb_special_locate(inp_p, from, to, netp, + vrf_id); + } else { + stcb = sctp_tcb_special_locate(&inp, from, to, netp, + vrf_id); + } + if (stcb != NULL) { + SCTP_INP_INFO_RUNLOCK(); + return (stcb); + } + } + 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) { + stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, + NULL); + } else { + stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, + NULL); + } + return (stcb); +} + +/* + * 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 offset, + struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, + struct sockaddr *dst) +{ + struct sctp_paramhdr *phdr, param_buf; +#if defined(INET) || defined(INET6) + struct sctp_tcb *stcb; + uint16_t ptype; +#endif + uint16_t plen; +#ifdef INET + struct sockaddr_in sin4; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6; +#endif + +#ifdef INET + memset(&sin4, 0, sizeof(sin4)); +#ifdef HAVE_SIN_LEN + sin4.sin_len = sizeof(sin4); +#endif + sin4.sin_family = AF_INET; + sin4.sin_port = sh->src_port; +#endif +#ifdef INET6 + memset(&sin6, 0, sizeof(sin6)); +#ifdef HAVE_SIN6_LEN + sin6.sin6_len = sizeof(sin6); +#endif + sin6.sin6_family = AF_INET6; + sin6.sin6_port = sh->src_port; +#endif + + offset += sizeof(struct sctp_init_chunk); + + phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); + while (phdr != NULL) { + /* now we must see if we want the parameter */ +#if defined(INET) || defined(INET6) + ptype = ntohs(phdr->param_type); +#endif + plen = ntohs(phdr->param_length); + if (plen == 0) { + break; + } +#ifdef INET + if (ptype == SCTP_IPV4_ADDRESS && + plen == sizeof(struct sctp_ipv4addr_param)) { + /* Get the rest of the address */ + struct sctp_ipv4addr_param ip4_param, *p4; + + phdr = sctp_get_next_param(m, offset, + (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); + if (phdr == NULL) { + return (NULL); + } + p4 = (struct sctp_ipv4addr_param *)phdr; + memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); + /* look it up */ + stcb = sctp_findassociation_ep_addr(inp_p, + (struct sockaddr *)&sin4, netp, dst, NULL); + if (stcb != NULL) { + return (stcb); + } + } +#endif +#ifdef INET6 + if (ptype == SCTP_IPV6_ADDRESS && + plen == sizeof(struct sctp_ipv6addr_param)) { + /* Get the rest of the address */ + struct sctp_ipv6addr_param ip6_param, *p6; + + phdr = sctp_get_next_param(m, offset, + (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); + if (phdr == NULL) { + return (NULL); + } + p6 = (struct sctp_ipv6addr_param *)phdr; + memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); + /* look it up */ + stcb = sctp_findassociation_ep_addr(inp_p, + (struct sockaddr *)&sin6, netp, dst, NULL); + if (stcb != NULL) { + return (stcb); + } + } +#endif + offset += SCTP_SIZE32(plen); + phdr = sctp_get_next_param(m, offset, ¶m_buf, + sizeof(param_buf)); + } + return (NULL); +} + +static struct sctp_tcb * +sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, + struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, + uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) +{ + /* + * 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; +#ifdef SCTP_MVRF + unsigned int i; +#endif + + SCTP_INP_INFO_RLOCK(); + head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, + SCTP_BASE_INFO(hashasocmark))]; + 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); + continue; + } +#ifdef SCTP_MVRF + for (i = 0; i < stcb->sctp_ep->num_vrfs; i++) { + if (stcb->sctp_ep->m_vrf_ids[i] == vrf_id) { + break; + } + } + if (i == stcb->sctp_ep->num_vrfs) { + SCTP_INP_RUNLOCK(inp); + continue; + } +#else + if (stcb->sctp_ep->def_vrf_id != vrf_id) { + SCTP_INP_RUNLOCK(stcb->sctp_ep); + continue; + } +#endif + SCTP_TCB_LOCK(stcb); + SCTP_INP_RUNLOCK(stcb->sctp_ep); + if (stcb->asoc.my_vtag == vtag) { + /* candidate */ + if (stcb->rport != rport) { + SCTP_TCB_UNLOCK(stcb); + continue; + } + if (stcb->sctp_ep->sctp_lport != lport) { + SCTP_TCB_UNLOCK(stcb); + continue; + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + SCTP_TCB_UNLOCK(stcb); + continue; + } + /* RRS:Need toaddr check here */ + if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { + /* Endpoint does not own this address */ + SCTP_TCB_UNLOCK(stcb); + continue; + } + if (remote_tag) { + /* If we have both vtags that's all we match on */ + if (stcb->asoc.peer_vtag == remote_tag) { + /* If both tags match we consider it conclusive + * and check NO source/destination addresses + */ + goto conclusive; + } + } + if (skip_src_check) { + conclusive: + if (from) { + *netp = sctp_findnet(stcb, from); + } else { + *netp = NULL; /* unknown */ + } + if (inp_p) + *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 offset, + struct sockaddr *src, struct sockaddr *dst, + struct sctphdr *sh, struct sctp_chunkhdr *ch, + struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) +{ + struct sctp_tcb *stcb; + struct sctp_inpcb *inp; + + if (sh->v_tag) { + /* we only go down this path if vtag is non-zero */ + stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), + inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); + if (stcb) { + return (stcb); + } + } + + if (inp_p) { + stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, + 1, vrf_id); + inp = *inp_p; + } else { + stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, + 1, vrf_id); + } + SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); + if (stcb == 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 listener before examining the + * TCP pool. + */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { + if (inp_p) { + *inp_p = NULL; + } + return (NULL); + } + stcb = sctp_findassociation_special_addr(m, + offset, sh, &inp, netp, dst); + if (inp_p != NULL) { + *inp_p = inp; + } + } + } + SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); + return (stcb); +} + +/* + * 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 offset, + struct sockaddr *dst, struct sctphdr *sh, + struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) +{ + struct sctp_tcb *stcb; + union sctp_sockstore remote_store; + struct sctp_paramhdr param_buf, *phdr; + int ptype; + int zero_address = 0; +#ifdef INET + struct sockaddr_in *sin; +#endif +#ifdef INET6 + struct sockaddr_in6 *sin6; +#endif + + memset(&remote_store, 0, sizeof(remote_store)); + phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), + ¶m_buf, sizeof(struct sctp_paramhdr)); + if (phdr == NULL) { + SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", + __func__); + return NULL; + } + ptype = (int)((uint32_t) ntohs(phdr->param_type)); + /* get the correlation address */ + switch (ptype) { +#ifdef INET6 + case 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_buf)); + if (p6 == NULL) { + SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", + __func__); + return (NULL); + } + sin6 = &remote_store.sin6; + sin6->sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(*sin6); +#endif + 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; + break; + } +#endif +#ifdef INET + case 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_buf)); + if (p4 == NULL) { + SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", + __func__); + return (NULL); + } + sin = &remote_store.sin; + sin->sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(*sin); +#endif + 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; + break; + } +#endif + default: + /* invalid address param type */ + return NULL; + } + + if (zero_address) { + stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, + netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); + if (stcb != NULL) { + SCTP_INP_DECR_REF(*inp_p); + } + } else { + stcb = sctp_findassociation_ep_addr(inp_p, + &remote_store.sa, netp, + dst, 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, uint32_t vrf_id) +{ + /* + * 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(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); + if (inp == NULL) { + SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); + SCTP_INP_INFO_WUNLOCK(); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); + return (ENOBUFS); + } + /* zap it */ + memset(inp, 0, sizeof(*inp)); + + /* bump generations */ +#if defined(__APPLE__) && !defined(__Userspace__) + inp->ip_inp.inp.inp_state = INPCB_STATE_INUSE; +#endif + /* setup socket pointers */ + inp->sctp_socket = so; + inp->ip_inp.inp.inp_socket = so; +#if defined(__FreeBSD__) && !defined(__Userspace__) + inp->ip_inp.inp.inp_cred = crhold(so->so_cred); +#endif +#ifdef INET6 +#if !defined(__Userspace__) && !defined(_WIN32) + if (INP_SOCKAF(so) == AF_INET6) { + if (MODULE_GLOBAL(ip6_auto_flowlabel)) { + inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; + } + if (MODULE_GLOBAL(ip6_v6only)) { + inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; + } + } +#endif +#endif + inp->sctp_associd_counter = 1; + inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; + inp->sctp_frag_point = 0; + inp->max_cwnd = 0; + inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); + inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); + inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); + inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); + inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); + inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); + inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); + inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); + inp->idata_supported = 0; + inp->zero_checksum = 0; + +#if defined(__FreeBSD__) && !defined(__Userspace__) + inp->fibnum = so->so_fibnum; +#else + inp->fibnum = 0; +#endif +#if defined(__Userspace__) + inp->ulp_info = NULL; + inp->recv_callback = NULL; + inp->send_callback = NULL; + inp->send_sb_threshold = 0; +#endif + /* init the small hash table we use to track asocid <-> tcb */ + inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); + if (inp->sctp_asocidhash == NULL) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + crfree(inp->ip_inp.inp.inp_cred); +#endif + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + SCTP_INP_INFO_WUNLOCK(); + return (ENOBUFS); + } + SCTP_INCR_EP_COUNT(); + inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); + SCTP_INP_INFO_WUNLOCK(); + + so->so_pcb = (caddr_t)inp; + + if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { + /* UDP style socket */ + inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | + SCTP_PCB_FLAGS_UNBOUND); + /* 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); + /* Be sure we have blocking IO by default */ + SOCK_LOCK(so); + SCTP_CLEAR_SO_NBIO(so); + SOCK_UNLOCK(so); + } else { + /* + * unsupported socket type (RAW, etc)- in case we missed it + * in protosw + */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); + so->so_pcb = NULL; +#if defined(__FreeBSD__) && !defined(__Userspace__) + crfree(inp->ip_inp.inp.inp_cred); +#endif + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + return (EOPNOTSUPP); + } + if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { + sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); + sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); + } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { + sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); + sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); + } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { + sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); + sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); + } + inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), + &inp->sctp_hashmark); + if (inp->sctp_tcbhash == NULL) { + SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); + so->so_pcb = NULL; +#if defined(__FreeBSD__) && !defined(__Userspace__) + crfree(inp->ip_inp.inp.inp_cred); +#endif + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + return (ENOBUFS); + } +#ifdef SCTP_MVRF + inp->vrf_size = SCTP_DEFAULT_VRF_SIZE; + SCTP_MALLOC(inp->m_vrf_ids, uint32_t *, + (sizeof(uint32_t) * inp->vrf_size), SCTP_M_MVRF); + if (inp->m_vrf_ids == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); + so->so_pcb = NULL; + SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); +#if defined(__FreeBSD__) && !defined(__Userspace__) + crfree(inp->ip_inp.inp.inp_cred); +#endif + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + return (ENOBUFS); + } + inp->m_vrf_ids[0] = vrf_id; + inp->num_vrfs = 1; +#endif + inp->def_vrf_id = vrf_id; + +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + inp->ip_inp.inp.inpcb_mtx = lck_mtx_alloc_init(SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr); + if (inp->ip_inp.inp.inpcb_mtx == NULL) { + SCTP_PRINTF("in_pcballoc: can't alloc mutex! so=%p\n", (void *)so); +#ifdef SCTP_MVRF + SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF); +#endif + SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); + so->so_pcb = NULL; + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + SCTP_UNLOCK_EXC(SCTP_BASE_INFO(sctbinfo).ipi_lock); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); + return (ENOMEM); + } +#elif defined(APPLE_LION) || defined(APPLE_MOUNTAINLION) + lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).mtx_grp, SCTP_BASE_INFO(sctbinfo).mtx_attr); +#else + lck_mtx_init(&inp->ip_inp.inp.inpcb_mtx, SCTP_BASE_INFO(sctbinfo).ipi_lock_grp, SCTP_BASE_INFO(sctbinfo).ipi_lock_attr); +#endif +#endif + SCTP_INP_INFO_WLOCK(); + SCTP_INP_LOCK_INIT(inp); +#if defined(__FreeBSD__) && !defined(__Userspace__) + rw_init_flags(&inp->ip_inp.inp.inp_lock, "sctpinp", + RW_RECURSE | RW_DUPOK); +#endif + 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(&SCTP_BASE_INFO(listhead), inp, sctp_list); +#if defined(__APPLE__) && !defined(__Userspace__) + inp->ip_inp.inp.inp_pcbinfo = &SCTP_BASE_INFO(sctbinfo); +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION) + LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).listhead, &inp->ip_inp.inp, inp_list); +#else + LIST_INSERT_HEAD(SCTP_BASE_INFO(sctbinfo).ipi_listhead, &inp->ip_inp.inp, inp_list); +#endif +#endif + 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] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ + m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ + m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); + m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); + m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); + m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); + m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); + /* all max/min max are in ms */ + m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); + m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); + m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); + m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); + m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); + m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); + m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); + m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); + m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); + m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; + m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; + m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); + m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); + + m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); + m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); + m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); + /* number of streams to pre-open on a association */ + m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); + + m->default_mtu = 0; + /* Add adaptation cookie */ + m->adaptation_layer_indicator = 0; + m->adaptation_layer_indicator_provided = 0; + + /* 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 */ + (void)SCTP_GETTIME_TIMEVAL(&time); + m->time_of_secret_change = (unsigned int)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_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); + /* + * Initialize authentication parameters + */ + m->local_hmacs = sctp_default_supported_hmaclist(); + m->local_auth_chunks = sctp_alloc_chunklist(); + if (inp->asconf_supported) { + sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); + sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); + } + m->default_dscp = 0; +#ifdef INET6 + m->default_flowlabel = 0; +#endif + m->port = 0; /* encapsulation disabled by default */ + 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; + + atomic_add_int(&stcb->asoc.refcnt, 1); + SCTP_TCB_UNLOCK(stcb); + SCTP_INP_INFO_WLOCK(); + SCTP_INP_WLOCK(old_inp); + SCTP_INP_WLOCK(new_inp); + SCTP_TCB_LOCK(stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#ifdef INET6 + if (old_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { + new_inp->ip_inp.inp.inp_flags |= old_inp->ip_inp.inp.inp_flags & INP_CONTROLOPTS; + if (old_inp->ip_inp.inp.in6p_outputopts) { + new_inp->ip_inp.inp.in6p_outputopts = ip6_copypktopts(old_inp->ip_inp.inp.in6p_outputopts, M_NOWAIT); + } + } +#endif +#if defined(INET) && defined(INET6) + else +#endif +#ifdef INET + { + new_inp->ip_inp.inp.inp_ip_tos = old_inp->ip_inp.inp.inp_ip_tos; + new_inp->ip_inp.inp.inp_ip_ttl = old_inp->ip_inp.inp.inp_ip_ttl; + } +#endif +#endif + 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); + if (stcb->asoc.in_asocid_hash) { + LIST_REMOVE(stcb, sctp_tcbasocidhash); + } + /* Now insert the new_inp into the TCP connected hash */ + head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(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. + */ + if (stcb->asoc.in_asocid_hash) { + struct sctpasochead *lhd; + lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, + new_inp->hashasocidmark)]; + LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); + } + /* 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(SCTP_BASE_INFO(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. + */ + SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); + continue; + } + SCTP_INCR_LADDR_COUNT(); + memset(laddr, 0, sizeof(*laddr)); + (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); + laddr->ifa = oladdr->ifa; + atomic_add_int(&laddr->ifa->refcount, 1); + LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, + sctp_nxt_addr); + new_inp->laddr_count++; + if (oladdr == stcb->asoc.last_used_address) { + stcb->asoc.last_used_address = laddr; + } + } + } + /* Now any running timers need to be adjusted. */ + if (stcb->asoc.dack_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.dack_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (stcb->asoc.asconf_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.asconf_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (stcb->asoc.strreset_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.strreset_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (stcb->asoc.shut_guard_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.shut_guard_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (stcb->asoc.autoclose_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.autoclose_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (stcb->asoc.delete_prim_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + stcb->asoc.delete_prim_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + /* now what about the nets? */ + TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { + if (net->pmtu_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + net->pmtu_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (net->hb_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + net->hb_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + if (net->rxt_timer.ep == old_inp) { + SCTP_INP_DECR_REF(old_inp); + net->rxt_timer.ep = new_inp; + SCTP_INP_INCR_REF(new_inp); + } + } + SCTP_INP_WUNLOCK(new_inp); + SCTP_INP_WUNLOCK(old_inp); +} + +/* + * insert an laddr entry with the given ifa for the desired list + */ +static int +sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) +{ + struct sctp_laddr *laddr; + + laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); + if (laddr == NULL) { + /* out of memory? */ + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + return (EINVAL); + } + SCTP_INCR_LADDR_COUNT(); + memset(laddr, 0, sizeof(*laddr)); + (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); + 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) + */ +static 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(SCTP_BASE_INFO(ipi_zone_laddr), laddr); + SCTP_DECR_LADDR_COUNT(); +} +#if !(defined(__FreeBSD__) || defined(__APPLE__) || defined(__Userspace__)) + +/* + * Don't know why, but without this there is an unknown reference when + * compiling NetBSD... hmm + */ +extern void in6_sin6_2_sin(struct sockaddr_in *, struct sockaddr_in6 *sin6); +#endif + +/* + * Bind the socket, with the PCB and global info locks held. Note, if a + * socket address is specified, the PCB lock may be dropped and re-acquired. + * + * sctp_ifap is used to bypass normal local address validation checks. + */ +int +#if defined(__FreeBSD__) && !defined(__Userspace__) +sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, struct thread *td) +#elif defined(_WIN32) && !defined(__Userspace__) +sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, PKTHREAD p) +#else +sctp_inpcb_bind_locked(struct sctp_inpcb *inp, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, struct proc *p) +#endif +{ + /* bind a ep to a socket address */ + struct sctppcbhead *head; + struct sctp_inpcb *inp_tmp; +#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) + struct inpcb *ip_inp; +#endif + int port_reuse_active = 0; + int bindall; +#ifdef SCTP_MVRF + int i; +#endif + uint16_t lport; + int error; + uint32_t vrf_id; + +#if defined(__FreeBSD__) && !defined(__Userspace__) + KASSERT(td != NULL, ("%s: null thread", __func__)); + +#endif + error = 0; + lport = 0; + bindall = 1; +#if (defined(__FreeBSD__) || defined(__APPLE__)) && !defined(__Userspace__) + ip_inp = &inp->ip_inp.inp; +#endif + + SCTP_INP_INFO_WLOCK_ASSERT(); + SCTP_INP_WLOCK_ASSERT(inp); + +#ifdef SCTP_DEBUG + if (addr) { + SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", + ntohs(((struct sockaddr_in *)addr)->sin_port)); + SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); + SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); + } +#endif + if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { + error = EINVAL; + /* already did a bind, subsequent binds NOT allowed ! */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + if (addr != NULL) { + switch (addr->sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + /* IPV6_V6ONLY socket? */ + if (SCTP_IPV6_V6ONLY(inp)) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(*sin)) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif + + sin = (struct sockaddr_in *)addr; + lport = sin->sin_port; +#if defined(__FreeBSD__) && !defined(__Userspace__) + /* + * For LOOPBACK the prison_local_ip4() call will transmute the ip address + * to the proper value. + */ + if ((error = prison_local_ip4(td->td_ucred, &sin->sin_addr)) != 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif + if (sin->sin_addr.s_addr != INADDR_ANY) { + bindall = 0; + } + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)addr; +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(*sin6)) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif + lport = sin6->sin6_port; +#if defined(__FreeBSD__) && !defined(__Userspace__) + /* + * For LOOPBACK the prison_local_ip6() call will transmute the ipv6 address + * to the proper value. + */ + if ((error = prison_local_ip6(td->td_ucred, &sin6->sin6_addr, + (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif + if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + bindall = 0; +#ifdef SCTP_EMBEDDED_V6_SCOPE + /* KAME hack: embed scopeid */ +#if defined(SCTP_KAME) + if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#elif defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL) != 0) { +#else + if (in6_embedscope(&sin6->sin6_addr, sin6, ip_inp, NULL, NULL) != 0) { +#endif + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#elif defined(__FreeBSD__) && !defined(__Userspace__) + error = scope6_check_id(sin6, MODULE_GLOBAL(ip6_use_defzone)); + if (error != 0) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#else + if (in6_embedscope(&sin6->sin6_addr, sin6) != 0) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif +#endif /* SCTP_EMBEDDED_V6_SCOPE */ + } +#ifndef SCOPEDROUTING + /* this must be cleared for ifa_ifwithaddr() */ + sin6->sin6_scope_id = 0; +#endif /* SCOPEDROUTING */ + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn; + +#ifdef HAVE_SA_LEN + if (addr->sa_len != sizeof(struct sockaddr_conn)) { + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#endif + sconn = (struct sockaddr_conn *)addr; + lport = sconn->sconn_port; + if (sconn->sconn_addr != NULL) { + bindall = 0; + } + break; + } +#endif + default: + error = EAFNOSUPPORT; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + } + /* Setup a vrf_id to be the default for the non-bind-all case. */ + vrf_id = inp->def_vrf_id; + + if (lport) { + /* + * Did the caller specify a port? if so we must see if an ep + * already has this one bound. + */ + /* got to be root to get at low ports */ +#if !(defined(_WIN32) && !defined(__Userspace__)) + if (ntohs(lport) < IPPORT_RESERVED && +#if defined(__FreeBSD__) && !defined(__Userspace__) + (error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { +#elif defined(__APPLE__) && !defined(__Userspace__) + (error = suser(p->p_ucred, &p->p_acflag)) != 0) { +#elif defined(__Userspace__) + /* TODO ensure uid is 0, etc... */ + 0) { +#else + (error = suser(p, 0)) != 0) { +#endif + goto out; + } +#endif + SCTP_INP_INCR_REF(inp); + SCTP_INP_WUNLOCK(inp); + if (bindall) { +#ifdef SCTP_MVRF + for (i = 0; i < inp->num_vrfs; i++) { + vrf_id = inp->m_vrf_ids[i]; +#else + vrf_id = inp->def_vrf_id; +#endif + 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); + /* unlock info */ + if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && + (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { + /* Ok, must be one-2-one and allowing port re-use */ + port_reuse_active = 1; + goto continue_anyway; + } + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + error = EADDRINUSE; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#ifdef SCTP_MVRF + } +#endif + } 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); + /* unlock info */ + if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && + (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { + /* Ok, must be one-2-one and allowing port re-use */ + port_reuse_active = 1; + goto continue_anyway; + } + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + error = EADDRINUSE; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + } + continue_anyway: + SCTP_INP_WLOCK(inp); + SCTP_INP_DECR_REF(inp); + if (bindall) { + /* verify that no lport is not used by a singleton */ + if ((port_reuse_active == 0) && + (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { + /* Sorry someone already has this one bound */ + if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && + (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { + port_reuse_active = 1; + } else { + error = EADDRINUSE; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + } + } + } else { + uint16_t first, last, candidate; + uint16_t count; + +#if defined(__Userspace__) + first = MODULE_GLOBAL(ipport_firstauto); + last = MODULE_GLOBAL(ipport_lastauto); +#elif defined(_WIN32) + first = 1; + last = 0xffff; +#elif defined(__FreeBSD__) || defined(__APPLE__) + if (ip_inp->inp_flags & INP_HIGHPORT) { + first = MODULE_GLOBAL(ipport_hifirstauto); + last = MODULE_GLOBAL(ipport_hilastauto); + } else if (ip_inp->inp_flags & INP_LOWPORT) { +#if defined(__FreeBSD__) + if ((error = priv_check(td, PRIV_NETINET_RESERVEDPORT)) != 0) { +#else + if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) { +#endif + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + first = MODULE_GLOBAL(ipport_lowfirstauto); + last = MODULE_GLOBAL(ipport_lowlastauto); + } else { + first = MODULE_GLOBAL(ipport_firstauto); + last = MODULE_GLOBAL(ipport_lastauto); + } +#endif + if (first > last) { + uint16_t temp; + + temp = first; + first = last; + last = temp; + } + count = last - first + 1; /* number of candidates */ + candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); + + for (;;) { +#ifdef SCTP_MVRF + for (i = 0; i < inp->num_vrfs; i++) { + if (sctp_isport_inuse(inp, htons(candidate), inp->m_vrf_ids[i]) != NULL) { + break; + } + } + if (i == inp->num_vrfs) { + lport = htons(candidate); + break; + } +#else + if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { + lport = htons(candidate); + break; + } +#endif + if (--count == 0) { + error = EADDRINUSE; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + if (candidate == last) + candidate = first; + else + candidate = candidate + 1; + } + } + 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. + */ + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + /* 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; + /* set the automatic addr changes from kernel flag */ + if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { + sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); + sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); + } else { + sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); + sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); + } + if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { + sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); + } else { + sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); + } + /* set the automatic mobility_base from kernel + flag (by micchie) + */ + if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { + sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + } else { + sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + } + /* set the automatic mobility_fasthandoff from kernel + flag (by micchie) + */ + if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { + sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + } else { + sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); + sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); + } + } 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; + union sctp_sockstore store; + + memset(&store, 0, sizeof(store)); + switch (addr->sa_family) { +#ifdef INET + case AF_INET: + memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); + store.sin.sin_port = 0; + break; +#endif +#ifdef INET6 + case AF_INET6: + memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); + store.sin6.sin6_port = 0; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + memcpy(&store.sconn, addr, sizeof(struct sockaddr_conn)); + store.sconn.sconn_port = 0; + break; +#endif + default: + break; + } + /* + * 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() + */ + if (sctp_ifap != NULL) { + ifa = sctp_ifap; + } else { + /* Note for BSD we hit here always other + * O/S's will pass things in via the + * sctp_ifap argument. + */ + ifa = sctp_find_ifa_by_addr(&store.sa, + vrf_id, SCTP_ADDR_NOT_LOCKED); + } + if (ifa == NULL) { + error = EADDRNOTAVAIL; + /* Can't find an interface with that address */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } +#ifdef INET6 + 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. */ + error = EINVAL; + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); + goto out; + } + } +#endif + /* we're not bound all */ + inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; + /* allow bindx() to send ASCONF's for binding changes */ + sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); + /* clear automatic addr changes from kernel flag */ + sctp_feature_off(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) + goto out; + inp->laddr_count++; + } + /* find the bucket */ + if (port_reuse_active) { + /* Put it into tcp 1-2-1 hash */ + head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; + inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; + } else { + head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; + } + /* put it in the bucket */ + LIST_INSERT_HEAD(head, inp, sctp_hash); + SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", + (void *)head, ntohs(lport), port_reuse_active); + /* set in the port */ + inp->sctp_lport = lport; + + /* turn off just the unbound flag */ + KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 0, + ("%s: inp %p is already bound", __func__, inp)); + inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; +out: + return (error); +} + +int +#if defined(__FreeBSD__) && !defined(__Userspace__) +sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, struct thread *td) +#elif defined(_WIN32) && !defined(__Userspace__) +sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, PKTHREAD p) +#else +sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, + struct sctp_ifa *sctp_ifap, struct proc *p) +#endif +{ + struct sctp_inpcb *inp; + int error; + + inp = so->so_pcb; + SCTP_INP_INFO_WLOCK(); + SCTP_INP_WLOCK(inp); +#if defined(__FreeBSD__) && !defined(__Userspace__) + error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, td); +#else + error = sctp_inpcb_bind_locked(inp, addr, sctp_ifap, p); +#endif + SCTP_INP_WUNLOCK(inp); + SCTP_INP_INFO_WUNLOCK(); + return (error); +} + +static void +sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) +{ + struct sctp_iterator *it, *nit; + + /* + * We enter with the only the ITERATOR_LOCK in place and a write + * lock on the inp_info stuff. + */ + it = sctp_it_ctl.cur_it; +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (it && (it->vn != curvnet)) { + /* Its not looking at our VNET */ + return; + } +#endif + if (it && (it->inp == inp)) { + /* + * This is tricky and we hold the iterator lock, + * but when it returns and gets the lock (when we + * release it) the iterator will try to operate on + * inp. We need to stop that from happening. But + * of course the iterator has a reference on the + * stcb and inp. We can mark it and it will stop. + * + * If its a single iterator situation, we + * set the end iterator flag. Otherwise + * we set the iterator to go to the next inp. + * + */ + if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { + sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; + } else { + sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; + } + } + /* Now go through and remove any single reference to + * our inp that may be still pending on the list + */ + SCTP_IPI_ITERATOR_WQ_LOCK(); + TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (it->vn != curvnet) { + continue; + } +#endif + if (it->inp == inp) { + /* This one points to me is it inp specific? */ + if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { + /* Remove and free this one */ + TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, + it, sctp_nxt_itr); + if (it->function_atend != NULL) { + (*it->function_atend) (it->pointer, it->val); + } + SCTP_FREE(it, SCTP_M_ITER); + } else { + it->inp = LIST_NEXT(it->inp, sctp_list); + if (it->inp) { + SCTP_INP_INCR_REF(it->inp); + } + } + /* When its put in the refcnt is incremented so decr it */ + SCTP_INP_DECR_REF(inp); + } + } + SCTP_IPI_ITERATOR_WQ_UNLOCK(); +} + +/* 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_tcb *stcb, *nstcb; + struct sctp_laddr *laddr, *nladdr; + struct inpcb *ip_pcb; + struct socket *so; + int being_refed = 0; + struct sctp_queued_to_read *sq, *nsq; +#if !defined(__Userspace__) +#if !defined(__FreeBSD__) + sctp_rtentry_t *rt; +#endif +#endif + int cnt; + sctp_sharedkey_t *shared_key, *nshared_key; + +#if defined(__APPLE__) && !defined(__Userspace__) + sctp_lock_assert(SCTP_INP_SO(inp)); +#endif +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 0); +#endif + SCTP_ITERATOR_LOCK(); + /* mark any iterators on the list or being processed */ + sctp_iterator_inp_being_freed(inp); + SCTP_ITERATOR_UNLOCK(); + + SCTP_ASOC_CREATE_LOCK(inp); + SCTP_INP_INFO_WLOCK(); + SCTP_INP_WLOCK(inp); + so = inp->sctp_socket; + KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) != 0, + ("%s: inp %p still has socket", __func__, inp)); + KASSERT((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) == 0, + ("%s: double free of inp %p", __func__, inp)); + if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { + inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; + /* socket is gone, so no more wakeups allowed */ + inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; + inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; + inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; + } + /* First time through we have the socket lock, after that no more. */ + 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; + } + 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 == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { + int cnt_in_sd; + + cnt_in_sd = 0; + LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { + SCTP_TCB_LOCK(stcb); + /* Disconnect the socket please. */ + stcb->sctp_socket = NULL; + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + /* Skip guys being freed */ + cnt_in_sd++; + if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { + /* + * Special case - we did not start a kill + * timer on the asoc due to it was not + * closed. So go ahead and start it now. + */ + SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); + sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); + } + SCTP_TCB_UNLOCK(stcb); + continue; + } + if (((SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_WAIT) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_COOKIE_ECHOED)) && + (stcb->asoc.total_output_queue_size == 0)) { + /* If we have data in queue, we don't want to just + * free since the app may have done, send()/close + * or connect/send/close. And it wants the data + * to get across first. + */ + /* Just abandon things in the front states */ + if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_NOFORCE, + SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { + cnt_in_sd++; + } + continue; + } + if ((stcb->asoc.size_on_reasm_queue > 0) || + (stcb->asoc.control_pdapi) || + (stcb->asoc.size_on_all_streams > 0) || + ((so != NULL) && (SCTP_SBAVAIL(&so->so_rcv) > 0))) { + /* Left with Data unread */ + struct mbuf *op_err; + + op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); + stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; + sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); + SCTP_STAT_INCR_COUNTER32(sctps_aborted); + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + if (sctp_free_assoc(inp, stcb, + SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { + cnt_in_sd++; + } + continue; + } else if (TAILQ_EMPTY(&stcb->asoc.send_queue) && + TAILQ_EMPTY(&stcb->asoc.sent_queue) && + (stcb->asoc.stream_queue_cnt == 0)) { + if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, &stcb->asoc)) { + goto abort_anyway; + } + if ((SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_SENT) && + (SCTP_GET_STATE(stcb) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { + struct sctp_nets *netp; + + /* + * there is nothing queued to send, + * so I send shutdown + */ + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + SCTP_SET_STATE(stcb, SCTP_STATE_SHUTDOWN_SENT); + sctp_stop_timers_for_shutdown(stcb); + if (stcb->asoc.alternate) { + netp = stcb->asoc.alternate; + } else { + netp = stcb->asoc.primary_destination; + } + sctp_send_shutdown(stcb, netp); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, + netp); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); + } + } else { + /* mark into shutdown pending */ + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_SHUTDOWN_PENDING); + sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, stcb->sctp_ep, stcb, NULL); + if ((*stcb->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete)(stcb, &stcb->asoc)) { + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_PARTIAL_MSG_LEFT); + } + if (TAILQ_EMPTY(&stcb->asoc.send_queue) && + TAILQ_EMPTY(&stcb->asoc.sent_queue) && + (stcb->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { + struct mbuf *op_err; + abort_anyway: + op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); + stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; + sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); + SCTP_STAT_INCR_COUNTER32(sctps_aborted); + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + if (sctp_free_assoc(inp, stcb, + SCTP_PCBFREE_NOFORCE, + SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { + cnt_in_sd++; + } + continue; + } else { + sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); + } + } + cnt_in_sd++; + SCTP_TCB_UNLOCK(stcb); + } + /* now is there some left in our SHUTDOWN state? */ + if (cnt_in_sd) { +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 2); +#endif + inp->sctp_socket = NULL; + SCTP_INP_WUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_INP_INFO_WUNLOCK(); + return; + } + } + inp->sctp_socket = NULL; + if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { + /* + * ok, this guy has been bound. It's port is + * somewhere in the SCTP_BASE_INFO(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; + LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_list, sctp_tcblist, nstcb) { + SCTP_TCB_LOCK(stcb); + if (immediate != SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { + /* Disconnect the socket please */ + stcb->sctp_socket = NULL; + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_CLOSED_SOCKET); + } + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + if (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { + SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); + sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); + } + cnt++; + SCTP_TCB_UNLOCK(stcb); + continue; + } + /* Free associations that are NOT killing us */ + if ((SCTP_GET_STATE(stcb) != SCTP_STATE_COOKIE_WAIT) && + ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { + struct mbuf *op_err; + + op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); + stcb->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; + sctp_send_abort_tcb(stcb, op_err, SCTP_SO_LOCKED); + SCTP_STAT_INCR_COUNTER32(sctps_aborted); + } else if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + cnt++; + SCTP_TCB_UNLOCK(stcb); + continue; + } + if ((SCTP_GET_STATE(stcb) == SCTP_STATE_OPEN) || + (SCTP_GET_STATE(stcb) == SCTP_STATE_SHUTDOWN_RECEIVED)) { + SCTP_STAT_DECR_GAUGE32(sctps_currestab); + } + if (sctp_free_assoc(inp, stcb, SCTP_PCBFREE_FORCE, + SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { + cnt++; + } + } + if (cnt) { + /* Ok we have someone out there that will kill us */ +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 3); +#endif + SCTP_INP_WUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_INP_INFO_WUNLOCK(); + return; + } + if (SCTP_INP_LOCK_CONTENDED(inp)) + being_refed++; + if (SCTP_INP_READ_CONTENDED(inp)) + being_refed++; + if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) + being_refed++; + /* NOTE: 0 refcount also means no timers are referencing us. */ + if ((inp->refcount) || + (being_refed) || + (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 4); +#endif + sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); + SCTP_INP_WUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_INP_INFO_WUNLOCK(); + return; + } + inp->sctp_ep.signature_change.type = 0; + inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; + /* Remove it from the list .. last thing we need a + * lock for. + */ + LIST_REMOVE(inp, sctp_list); + SCTP_INP_WUNLOCK(inp); + SCTP_ASOC_CREATE_UNLOCK(inp); + SCTP_INP_INFO_WUNLOCK(); + +#ifdef SCTP_LOG_CLOSING + sctp_log_closing(inp, NULL, 5); +#endif +#if !(defined(_WIN32) || defined(__Userspace__)) +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + rt = ip_pcb->inp_route.ro_rt; +#endif +#endif + if ((inp->sctp_asocidhash) != NULL) { + SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); + inp->sctp_asocidhash = NULL; + } + /*sa_ignore FREED_MEMORY*/ + TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { + /* Its only abandoned if it had data left */ + if (sq->length) + SCTP_STAT_INCR(sctps_left_abandon); + + 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_free_a_readq(NULL, sq); + } + /* 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. + */ + if (ip_pcb->inp_options) { + (void)sctp_m_free(ip_pcb->inp_options); + ip_pcb->inp_options = 0; + } +#if !(defined(_WIN32) || defined(__Userspace__)) +#if !defined(__FreeBSD__) + if (rt) { + RTFREE(rt); + ip_pcb->inp_route.ro_rt = 0; + } +#endif +#endif +#ifdef INET6 +#if !(defined(_WIN32) || defined(__Userspace__)) +#if (defined(__FreeBSD__) || defined(__APPLE__) && !defined(__Userspace__)) + if (ip_pcb->inp_vflag & INP_IPV6) { +#else + if (inp->inp_vflag & INP_IPV6) { +#endif + ip6_freepcbopts(ip_pcb->in6p_outputopts); + } +#endif +#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); + + LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { + LIST_REMOVE(shared_key, next); + sctp_free_sharedkey(shared_key); + /*sa_ignore FREED_MEMORY*/ + } + +#if defined(__APPLE__) && !defined(__Userspace__) + inp->ip_inp.inp.inp_state = INPCB_STATE_DEAD; + if (in_pcb_checkstate(&inp->ip_inp.inp, WNT_STOPUSING, 1) != WNT_STOPUSING) { +#ifdef INVARIANTS + panic("sctp_inpcb_free inp = %p couldn't set to STOPUSING", (void *)inp); +#else + SCTP_PRINTF("sctp_inpcb_free inp = %p couldn't set to STOPUSING\n", (void *)inp); +#endif + } + inp->ip_inp.inp.inp_socket->so_flags |= SOF_PCBCLEARING; +#endif + /* + * 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. + */ + LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { + sctp_remove_laddr(laddr); + } + +#ifdef SCTP_TRACK_FREED_ASOCS + /* TEMP CODE */ + LIST_FOREACH_SAFE(stcb, &inp->sctp_asoc_free_list, sctp_tcblist, nstcb) { + LIST_REMOVE(stcb, sctp_tcblist); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); + SCTP_DECR_ASOC_COUNT(); + } + /* *** END TEMP CODE ****/ +#endif +#ifdef SCTP_MVRF + SCTP_FREE(inp->m_vrf_ids, SCTP_M_MVRF); +#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 */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + crfree(inp->ip_inp.inp.inp_cred); + INP_LOCK_DESTROY(&inp->ip_inp.inp); +#endif + SCTP_INP_LOCK_DESTROY(inp); + SCTP_INP_READ_DESTROY(inp); + SCTP_ASOC_CREATE_LOCK_DESTROY(inp); +#if !(defined(__APPLE__) && !defined(__Userspace__)) + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); + SCTP_DECR_EP_COUNT(); +#else + /* For Tiger, we will do this later... */ +#endif +} + +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); +} + +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, SCTP_ADDR_NOT_LOCKED); + if (sctp_ifa) { + return (1); + } else { + return (0); + } +} + +/* + * 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_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, + struct sctp_nets **netp, uint16_t port, int set_scope, int from) +{ + /* + * The following is redundant to the same lines in the + * sctp_aloc_assoc() but is needed since others call the add + * address function + */ + struct sctp_nets *net, *netfirst; + int addr_inscope; + + SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", + from); + SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); + + 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; + switch (newaddr->sa_family) { +#ifdef INET + case 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 zero area */ + memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); + + /* assure len is set */ +#ifdef HAVE_SIN_LEN + sin->sin_len = sizeof(struct sockaddr_in); +#endif + if (set_scope) { + if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { + stcb->asoc.scope.ipv4_local_scope = 1; + } + } else { + /* Validate the address is in scope */ + if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && + (stcb->asoc.scope.ipv4_local_scope == 0)) { + addr_inscope = 0; + } + } + break; + } +#endif +#ifdef INET6 + case 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 */ +#ifdef HAVE_SIN6_LEN + sin6->sin6_len = sizeof(struct sockaddr_in6); +#endif + if (set_scope) { + if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { + stcb->asoc.scope.loopback_scope = 1; + stcb->asoc.scope.local_scope = 0; + stcb->asoc.scope.ipv4_local_scope = 1; + stcb->asoc.scope.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.scope.ipv4_local_scope = 1; + stcb->asoc.scope.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.scope.site_scope = 1; + } + } else { + /* Validate the address is in scope */ + if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && + (stcb->asoc.scope.loopback_scope == 0)) { + addr_inscope = 0; + } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && + (stcb->asoc.scope.local_scope == 0)) { + addr_inscope = 0; + } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && + (stcb->asoc.scope.site_scope == 0)) { + addr_inscope = 0; + } + } + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn; + + sconn = (struct sockaddr_conn *)newaddr; + if (sconn->sconn_addr == NULL) { + /* Invalid address */ + return (-1); + } +#ifdef HAVE_SCONN_LEN + sconn->sconn_len = sizeof(struct sockaddr_conn); +#endif + break; + } +#endif + default: + /* not supported family type */ + return (-1); + } + net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); + if (net == NULL) { + return (-1); + } + SCTP_INCR_RADDR_COUNT(); + memset(net, 0, sizeof(struct sctp_nets)); + (void)SCTP_GETTIME_TIMEVAL(&net->start_time); +#ifdef HAVE_SA_LEN + memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); +#endif + switch (newaddr->sa_family) { +#ifdef INET + case AF_INET: +#ifndef HAVE_SA_LEN + memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in)); +#endif + ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; + break; +#endif +#ifdef INET6 + case AF_INET6: +#ifndef HAVE_SA_LEN + memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_in6)); +#endif + ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: +#ifndef HAVE_SA_LEN + memcpy(&net->ro._l_addr, newaddr, sizeof(struct sockaddr_conn)); +#endif + ((struct sockaddr_conn *)&net->ro._l_addr)->sconn_port = stcb->rport; + break; +#endif + default: + break; + } + 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.scope.loopback_scope = 1; + stcb->asoc.scope.ipv4_local_scope = 1; + stcb->asoc.scope.local_scope = 0; + stcb->asoc.scope.site_scope = 1; + addr_inscope = 1; + } + net->failure_threshold = stcb->asoc.def_net_failure; + net->pf_threshold = stcb->asoc.def_net_pf_threshold; + 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; + } + /* We set this to 0, the timer code knows that + * this means its an initial value + */ + net->rto_needed = 1; + net->RTO = 0; + net->RTO_measured = 0; + stcb->asoc.numnets++; + net->ref_count = 1; + net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; + net->port = port; + net->dscp = stcb->asoc.default_dscp; +#ifdef INET6 + net->flowlabel = stcb->asoc.default_flowlabel; +#endif + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { + net->dest_state |= SCTP_ADDR_NOHB; + } else { + net->dest_state &= ~SCTP_ADDR_NOHB; + } + if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { + net->dest_state |= SCTP_ADDR_NO_PMTUD; + } else { + net->dest_state &= ~SCTP_ADDR_NO_PMTUD; + } + net->heart_beat_delay = stcb->asoc.heart_beat_delay; + /* Init the timer structure */ + SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); + SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); + SCTP_OS_TIMER_INIT(&net->hb_timer.timer); + + /* Now generate a route for this guy */ +#ifdef INET6 +#ifdef SCTP_EMBEDDED_V6_SCOPE + /* KAME hack: embed scopeid */ + if (newaddr->sa_family == AF_INET6) { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) + (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL); +#else + (void)in6_embedscope(&sin6->sin6_addr, sin6, &stcb->sctp_ep->ip_inp.inp, NULL, NULL); +#endif +#elif defined(SCTP_KAME) + (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); +#else + (void)in6_embedscope(&sin6->sin6_addr, sin6); +#endif +#ifndef SCOPEDROUTING + sin6->sin6_scope_id = 0; +#endif + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif + SCTP_RTALLOC((sctp_route_t *)&net->ro, + stcb->asoc.vrf_id, + stcb->sctp_ep->fibnum); + + net->src_addr_selected = 0; +#if !defined(__Userspace__) + if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { + /* Get source address */ + net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, + stcb, + (sctp_route_t *)&net->ro, + net, + 0, + stcb->asoc.vrf_id); + if (stcb->asoc.default_mtu > 0) { + net->mtu = stcb->asoc.default_mtu; + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + net->mtu += SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + net->mtu += SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + net->mtu += sizeof(struct sctphdr); + break; +#endif + default: + break; + } +#if defined(INET) || defined(INET6) + if (net->port) { + net->mtu += (uint32_t)sizeof(struct udphdr); + } +#endif + } else if (net->ro._s_addr != NULL) { + uint32_t imtu, rmtu, hcmtu; + + net->src_addr_selected = 1; + /* Now get the interface MTU */ + if (net->ro._s_addr->ifn_p != NULL) { + /* + * XXX: Should we here just use + * net->ro._s_addr->ifn_p->ifn_mtu + */ + imtu = SCTP_GATHER_MTU_FROM_IFN_INFO(net->ro._s_addr->ifn_p->ifn_p, + net->ro._s_addr->ifn_p->ifn_index); + } else { + imtu = 0; + } +#if defined(__FreeBSD__) && !defined(__Userspace__) + rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); + hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); +#else + rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); + hcmtu = 0; +#endif + net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); +#if defined(__FreeBSD__) && !defined(__Userspace__) +#else + if (rmtu == 0) { + /* Start things off to match mtu of interface please. */ + SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, + net->ro.ro_rt, net->mtu); + } +#endif + } + } +#endif + if (net->mtu == 0) { + if (stcb->asoc.default_mtu > 0) { + net->mtu = stcb->asoc.default_mtu; + switch (net->ro._l_addr.sa.sa_family) { +#ifdef INET + case AF_INET: + net->mtu += SCTP_MIN_V4_OVERHEAD; + break; +#endif +#ifdef INET6 + case AF_INET6: + net->mtu += SCTP_MIN_OVERHEAD; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + net->mtu += sizeof(struct sctphdr); + break; +#endif + default: + break; + } +#if defined(INET) || defined(INET6) + if (net->port) { + net->mtu += (uint32_t)sizeof(struct udphdr); + } +#endif + } else { + switch (newaddr->sa_family) { +#ifdef INET + case AF_INET: + net->mtu = SCTP_DEFAULT_MTU; + break; +#endif +#ifdef INET6 + case AF_INET6: + net->mtu = 1280; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + net->mtu = 1280; + break; +#endif + default: + break; + } + } + } +#if defined(INET) || defined(INET6) + if (net->port) { + net->mtu -= (uint32_t)sizeof(struct udphdr); + } +#endif + if (from == SCTP_ALLOC_ASOC) { + stcb->asoc.smallest_mtu = net->mtu; + } + if (stcb->asoc.smallest_mtu > net->mtu) { + sctp_pathmtu_adjustment(stcb, net->mtu, true); + } +#ifdef INET6 +#ifdef SCTP_EMBEDDED_V6_SCOPE + if (newaddr->sa_family == AF_INET6) { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; +#ifdef SCTP_KAME + (void)sa6_recoverscope(sin6); +#else + (void)in6_recoverscope(sin6, &sin6->sin6_addr, NULL); +#endif /* SCTP_KAME */ + } +#endif /* SCTP_EMBEDDED_V6_SCOPE */ +#endif + + /* JRS - Use the congestion control given in the CC module */ + if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) + (*stcb->asoc.cc_functions.sctp_set_initial_cc_param)(stcb, net); + + /* + * 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; +#if defined(__FreeBSD__) && !defined(__Userspace__) + /* Choose an initial flowid. */ + net->flowid = stcb->asoc.my_vtag ^ + ntohs(stcb->rport) ^ + ntohs(stcb->sctp_ep->sctp_lport); + net->flowtype = M_HASHTYPE_OPAQUE_HASH; +#endif + if (netp) { + *netp = net; + } + netfirst = TAILQ_FIRST(&stcb->asoc.nets); +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (net->ro.ro_nh == NULL) { +#else + if (net->ro.ro_rt == NULL) { +#endif + /* 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); +#if defined(__FreeBSD__) && !defined(__Userspace__) + } else if (netfirst->ro.ro_nh == NULL) { +#else + } else if (netfirst->ro.ro_rt == NULL) { +#endif + /* + * First one has NO route. Place this one ahead of the first + * one. + */ + TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); +#if defined(__FreeBSD__) && !defined(__Userspace__) + } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { +#else + } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { +#endif + /* + * 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; +#if defined(__FreeBSD__) && !defined(__Userspace__) + } else if (netlook->ro.ro_nh == NULL) { +#else + } else if (netlook->ro.ro_rt == NULL) { +#endif + /* next one has NO route */ + TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); + break; +#if defined(__FreeBSD__) && !defined(__Userspace__) + } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { +#else + } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { +#endif + 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; +#if defined(__FreeBSD__) && !defined(__Userspace__) + } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && + (net->ro.ro_nh) && +#else + } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && + (net->ro.ro_rt) && +#endif + ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { + /* No route to current primary adopt new primary */ + stcb->asoc.primary_destination = 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 efficient 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); +} + +static uint32_t +sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) +{ + uint32_t id; + struct sctpasochead *head; + struct sctp_tcb *lstcb; + + try_again: + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { + /* TSNH */ + return (0); + } + /* + * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, + * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. + */ + if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { + inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; + } + id = inp->sctp_associd_counter; + inp->sctp_associd_counter++; + lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); + if (lstcb) { + goto try_again; + } + head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; + LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); + stcb->asoc.in_asocid_hash = 1; + return (id); +} + +/* + * 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. + */ +static struct sctp_tcb * +sctp_aloc_assoc_locked(struct sctp_inpcb *inp, struct sockaddr *firstaddr, + int *error, uint32_t override_tag, uint32_t initial_tsn, + uint32_t vrf_id, uint16_t o_streams, uint16_t port, +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct thread *p, +#elif defined(_WIN32) && !defined(__Userspace__) + PKTHREAD p, +#else +#if defined(__Userspace__) + /* __Userspace__ NULL proc is going to be passed here. See sctp_lower_sosend */ +#endif + struct proc *p, +#endif + int initialize_auth_params) +{ + /* note the p argument is only valid in unbound sockets */ + + struct sctp_tcb *stcb; + struct sctp_association *asoc; + struct sctpasochead *head; + uint16_t rport; + int err; + + SCTP_INP_INFO_WLOCK_ASSERT(); + SCTP_INP_WLOCK_ASSERT(inp); + + /* + * Assumption made here: Caller has done a + * sctp_findassociation_ep_addr(ep, addr's); to make sure the + * address does not exist already. + */ + if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { + /* Hit max assoc, sorry no more */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); + *error = ENOBUFS; + return (NULL); + } + if (firstaddr == NULL) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && + ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || + (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { + /* + * 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_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || + (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { + if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || + (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + } + SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); +#ifdef SCTP_DEBUG + if (firstaddr) { + SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); + switch (firstaddr->sa_family) { +#ifdef INET + case AF_INET: + SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", + ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); + break; +#endif +#ifdef INET6 + case AF_INET6: + SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", + ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", + ntohs(((struct sockaddr_conn *)firstaddr)->sconn_port)); + break; +#endif + default: + break; + } + } else { + SCTPDBG(SCTP_DEBUG_PCB3,"None\n"); + } +#endif /* SCTP_DEBUG */ + switch (firstaddr->sa_family) { +#ifdef INET + case AF_INET: + { + struct sockaddr_in *sin; + + sin = (struct sockaddr_in *)firstaddr; + if ((ntohs(sin->sin_port) == 0) || + (sin->sin_addr.s_addr == INADDR_ANY) || + (sin->sin_addr.s_addr == INADDR_BROADCAST) || + IN_MULTICAST(ntohl(sin->sin_addr.s_addr)) || +#if defined(__Userspace__) + ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) || + ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + (SCTP_IPV6_V6ONLY(inp) != 0)))) { +#else + ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && + (SCTP_IPV6_V6ONLY(inp) != 0))) { +#endif + /* Invalid address */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + rport = sin->sin_port; + break; + } +#endif +#ifdef INET6 + case AF_INET6: + { + struct sockaddr_in6 *sin6; + + sin6 = (struct sockaddr_in6 *)firstaddr; + if ((ntohs(sin6->sin6_port) == 0) || + IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || + IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) || + ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0)) { + /* Invalid address */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + rport = sin6->sin6_port; + break; + } +#endif +#if defined(__Userspace__) + case AF_CONN: + { + struct sockaddr_conn *sconn; + + sconn = (struct sockaddr_conn *)firstaddr; + if ((ntohs(sconn->sconn_port) == 0) || + (sconn->sconn_addr == NULL) || + ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_CONN) == 0)) { + /* Invalid address */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + rport = sconn->sconn_port; + break; + } +#endif + default: + /* not supported family type */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); + *error = EINVAL; + return (NULL); + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { + /* + * If you have not performed a bind, then we need to do the + * ephemeral bind for you. + */ + if ((err = sctp_inpcb_bind_locked(inp, NULL, NULL, p))) { + /* bind error, probably perm */ + *error = err; + return (NULL); + } + } + stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); + if (stcb == NULL) { + /* out of memory? */ + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); + *error = ENOMEM; + return (NULL); + } + SCTP_INCR_ASOC_COUNT(); + + memset(stcb, 0, sizeof(*stcb)); + asoc = &stcb->asoc; + + SCTP_TCB_LOCK_INIT(stcb); + stcb->rport = rport; + /* setup back pointer's */ + stcb->sctp_ep = inp; + stcb->sctp_socket = inp->sctp_socket; + if ((err = sctp_init_asoc(inp, stcb, override_tag, initial_tsn, vrf_id, o_streams))) { + /* failed */ + SCTP_TCB_LOCK_DESTROY(stcb); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); + SCTP_DECR_ASOC_COUNT(); + *error = err; + return (NULL); + } + SCTP_TCB_LOCK(stcb); + + asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); + /* now that my_vtag is set, add it to the hash */ + head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; + /* put it in the bucket in the vtag hash of assoc's for the system */ + LIST_INSERT_HEAD(head, stcb, sctp_asocs); + + if (sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC)) { + /* failure.. memory error? */ + if (asoc->strmout) { + SCTP_FREE(asoc->strmout, SCTP_M_STRMO); + asoc->strmout = NULL; + } + if (asoc->mapping_array) { + SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); + asoc->mapping_array = NULL; + } + if (asoc->nr_mapping_array) { + SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); + asoc->nr_mapping_array = NULL; + } + SCTP_DECR_ASOC_COUNT(); + SCTP_TCB_UNLOCK(stcb); + SCTP_TCB_LOCK_DESTROY(stcb); + LIST_REMOVE(stcb, sctp_asocs); + LIST_REMOVE(stcb, sctp_tcbasocidhash); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); + SCTP_INP_WUNLOCK(inp); + SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); + *error = ENOBUFS; + return (NULL); + } + /* Init all the timers */ + 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->delete_prim_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); + } + if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { + sctp_initialize_auth_params(inp, stcb); + } + SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); + return (stcb); +} + +struct sctp_tcb * +sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, + int *error, uint32_t override_tag, uint32_t initial_tsn, + uint32_t vrf_id, uint16_t o_streams, uint16_t port, +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct thread *p, +#elif defined(_WIN32) && !defined(__Userspace__) + PKTHREAD p, +#else + struct proc *p, +#endif + int initialize_auth_params) +{ + struct sctp_tcb *stcb; + + SCTP_INP_INFO_WLOCK(); + SCTP_INP_WLOCK(inp); + stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, + initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); + SCTP_INP_INFO_WUNLOCK(); + SCTP_INP_WUNLOCK(inp); + return (stcb); +} + +struct sctp_tcb * +sctp_aloc_assoc_connected(struct sctp_inpcb *inp, struct sockaddr *firstaddr, + int *error, uint32_t override_tag, uint32_t initial_tsn, + uint32_t vrf_id, uint16_t o_streams, uint16_t port, +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct thread *p, +#elif defined(_WIN32) && !defined(__Userspace__) + PKTHREAD p, +#else + struct proc *p, +#endif + int initialize_auth_params) +{ + struct sctp_tcb *stcb; + + SCTP_INP_INFO_WLOCK(); + SCTP_INP_WLOCK(inp); + if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) && + SCTP_IS_LISTENING(inp)) { + SCTP_INP_INFO_WUNLOCK(); + SCTP_INP_WUNLOCK(inp); + *error = EINVAL; + return (NULL); + } + stcb = sctp_aloc_assoc_locked(inp, firstaddr, error, override_tag, + initial_tsn, vrf_id, o_streams, port, p, initialize_auth_params); + SCTP_INP_INFO_WUNLOCK(); + if (stcb != NULL && (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { + inp->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED; + soisconnecting(inp->sctp_socket); + } + SCTP_INP_WUNLOCK(inp); + return (stcb); +} + +void +sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) +{ + struct sctp_inpcb *inp; + struct sctp_association *asoc; + + inp = stcb->sctp_ep; + 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); + /* Mobility adaptation + Ideally, if deleted destination is the primary, it becomes + a fast retransmission trigger by the subsequent SET PRIMARY. + (by micchie) + */ + if (sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_BASE) || + sctp_is_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_FASTHANDOFF)) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); + if (asoc->deleted_primary != NULL) { + SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); + goto out; + } + asoc->deleted_primary = net; + atomic_add_int(&net->ref_count, 1); + memset(&net->lastsa, 0, sizeof(net->lastsa)); + memset(&net->lastsv, 0, sizeof(net->lastsv)); + sctp_mobility_feature_on(stcb->sctp_ep, + SCTP_MOBILITY_PRIM_DELETED); + sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, + stcb->sctp_ep, stcb, NULL); + } +out: + /* 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; + } + if (net == asoc->last_net_cmt_send_started) { + /* Clear net */ + asoc->last_net_cmt_send_started = NULL; + } + if (net == stcb->asoc.alternate) { + sctp_free_remote_addr(stcb->asoc.alternate); + stcb->asoc.alternate = NULL; + } + sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, + SCTP_FROM_SCTP_PCB + SCTP_LOC_9); + sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, + SCTP_FROM_SCTP_PCB + SCTP_LOC_10); + net->dest_state |= SCTP_ADDR_BEING_DELETED; + 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, *nnet; + + asoc = &stcb->asoc; + + /* locate the address */ + TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { + 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); +} + +static bool +sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport, uint32_t now) +{ + struct sctpvtaghead *chain; + struct sctp_tagblock *twait_block; + int i; + + SCTP_INP_INFO_LOCK_ASSERT(); + chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; + LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { + for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { + if ((twait_block->vtag_block[i].tv_sec_at_expire >= now) && + (twait_block->vtag_block[i].v_tag == tag) && + (twait_block->vtag_block[i].lport == lport) && + (twait_block->vtag_block[i].rport == rport)) { + return (true); + } + } + } + return (false); +} + +static void +sctp_set_vtag_block(struct sctp_timewait *vtag_block, uint32_t time, + uint32_t tag, uint16_t lport, uint16_t rport) +{ + vtag_block->tv_sec_at_expire = time; + vtag_block->v_tag = tag; + vtag_block->lport = lport; + vtag_block->rport = rport; +} + +static void +sctp_add_vtag_to_timewait(uint32_t tag, uint16_t lport, uint16_t rport) +{ + struct sctpvtaghead *chain; + struct sctp_tagblock *twait_block; + struct timeval now; + uint32_t time; + int i; + bool set; + + SCTP_INP_INFO_WLOCK_ASSERT(); + (void)SCTP_GETTIME_TIMEVAL(&now); + time = (uint32_t)now.tv_sec + SCTP_BASE_SYSCTL(sctp_vtag_time_wait); + chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; + set = false; + LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { + /* Block(s) present, lets find space, and expire on the fly */ + for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { + if ((twait_block->vtag_block[i].v_tag == 0) && !set) { + sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); + set = true; + continue; + } + if ((twait_block->vtag_block[i].v_tag != 0) && + (twait_block->vtag_block[i].tv_sec_at_expire < (uint32_t)now.tv_sec)) { + if (set) { + /* Audit expires this guy */ + sctp_set_vtag_block(twait_block->vtag_block + i, 0, 0, 0, 0); + } else { + /* Reuse it for the new tag */ + sctp_set_vtag_block(twait_block->vtag_block + i, time, tag, lport, rport); + set = true; + } + } + } + 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), SCTP_M_TIMW); + if (twait_block == NULL) { + return; + } + memset(twait_block, 0, sizeof(struct sctp_tagblock)); + LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); + sctp_set_vtag_block(twait_block->vtag_block, time, tag, lport, rport); + } +} + +void +sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) +{ + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_queued_to_read *control, *ncontrol; + + TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { + TAILQ_REMOVE(rh, control, next_instrm); + control->on_strm_q = 0; + if (control->on_read_q == 0) { + sctp_free_remote_addr(control->whoFrom); + if (control->data) { + sctp_m_freem(control->data); + control->data = NULL; + } + } + /* Reassembly free? */ + TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { + TAILQ_REMOVE(&control->reasm, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + sctp_free_remote_addr(chk->whoTo); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + /*sa_ignore FREED_MEMORY*/ + } + /* + * We don't free the address here + * since all the net's were freed + * above. + */ + if (control->on_read_q == 0) { + sctp_free_a_readq(stcb, control); + } + } +} + +/*- + * Free the association after un-hashing the remote port. This + * function ALWAYS returns holding NO LOCK on the stcb. It DOES + * expect that the input to this function IS a locked TCB. + * It will return 0, if it did NOT destroy the association (instead + * it unlocks it. It will return NON-zero if it either destroyed the + * association OR the association is already destroyed. + */ +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, *nnet; + struct sctp_laddr *laddr, *naddr; + struct sctp_tmit_chunk *chk, *nchk; + struct sctp_asconf_addr *aparam, *naparam; + struct sctp_asconf_ack *aack, *naack; + struct sctp_stream_reset_list *strrst, *nstrrst; + struct sctp_queued_to_read *sq, *nsq; + struct sctp_stream_queue_pending *sp, *nsp; + sctp_sharedkey_t *shared_key, *nshared_key; + struct socket *so; + + /* first, lets purge the entry from the hash table. */ +#if defined(__APPLE__) && !defined(__Userspace__) + sctp_lock_assert(SCTP_INP_SO(inp)); +#endif + SCTP_TCB_LOCK_ASSERT(stcb); + +#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); + } + if (stcb->asoc.alternate) { + sctp_free_remote_addr(stcb->asoc.alternate); + stcb->asoc.alternate = NULL; + } +#if !(defined(__APPLE__) && !defined(__Userspace__)) + /* TEMP CODE */ + if (stcb->freed_from_where == 0) { + /* Only record the first place free happened from */ + stcb->freed_from_where = from_location; + } + /* TEMP CODE */ +#endif + + 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_stop_association_timers(stcb, false); + /* Now the read queue needs to be cleaned up (only once) */ + if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { + SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); + 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_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { + /* + * Need to add a PD-API aborted indication. + * Setting the control_pdapi assures that it will + * be added right after this msg. + */ + uint32_t strseq; + stcb->asoc.control_pdapi = sq; + strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); + sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, + stcb, + SCTP_PARTIAL_DELIVERY_ABORTED, + (void *)&strseq, + SCTP_SO_LOCKED); + stcb->asoc.control_pdapi = NULL; + } + } + /* Add an end to wake them */ + sq->end_added = 1; + } + } + SCTP_INP_READ_UNLOCK(inp); + if (stcb->block_entry) { + SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); + stcb->block_entry->error = ECONNRESET; + stcb->block_entry = NULL; + } + } + if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { + /* Someone holds a reference OR the socket is unaccepted yet. + */ + if ((stcb->asoc.refcnt) || + (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || + (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { + SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); + sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); + } + 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_TCB_UNLOCK(stcb); + +#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_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) { + SOCKBUF_LOCK(&so->so_rcv); + so->so_state &= ~(SS_ISCONNECTING | + SS_ISDISCONNECTING | + SS_ISCONFIRMING | + SS_ISCONNECTED); + so->so_state |= SS_ISDISCONNECTED; +#if defined(__APPLE__) && !defined(__Userspace__) + socantrcvmore(so); +#else + socantrcvmore_locked(so); +#endif + socantsendmore(so); + sctp_sowwakeup(inp, so); + sctp_sorwakeup(inp, so); + SCTP_SOWAKEUP(so); + } + } + } + + /* Make it invalid too, that way if its + * about to run it will abort and return. + */ + /* re-increment the lock */ + if (from_inpcbfree == SCTP_NORMAL_PROC) { + atomic_subtract_int(&stcb->asoc.refcnt, 1); + } + if (stcb->asoc.refcnt) { + SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); + sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); + if (from_inpcbfree == SCTP_NORMAL_PROC) { + SCTP_INP_INFO_WUNLOCK(); + SCTP_INP_WUNLOCK(inp); + } + SCTP_TCB_UNLOCK(stcb); + return (0); + } + asoc->state = 0; + if (inp->sctp_tcbhash) { + LIST_REMOVE(stcb, sctp_tcbhash); + } + if (stcb->asoc.in_asocid_hash) { + LIST_REMOVE(stcb, sctp_tcbasocidhash); + } + if (inp->sctp_socket == NULL) { + stcb->sctp_socket = NULL; + } + /* 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); + } + /* pull from vtag hash */ + LIST_REMOVE(stcb, sctp_asocs); + sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport); + + /* Now restop the timers to be sure + * this is paranoia at is finest! + */ + sctp_stop_association_timers(stcb, true); + + /* + * 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 */ + TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { + atomic_subtract_int(&asoc->stream_queue_cnt, 1); + TAILQ_REMOVE(&outs->outqueue, sp, next); + stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp); + sctp_free_spbufspace(stcb, asoc, sp); + if (sp->data) { + if (so) { + /* Still an open socket - report */ + sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, + 0, (void *)sp, SCTP_SO_LOCKED); + } + if (sp->data) { + sctp_m_freem(sp->data); + sp->data = NULL; + sp->tail_mbuf = NULL; + sp->length = 0; + } + } + if (sp->net) { + sctp_free_remote_addr(sp->net); + sp->net = NULL; + } + sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); + } + } + /*sa_ignore FREED_MEMORY*/ + TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { + TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); + SCTP_FREE(strrst, SCTP_M_STRESET); + } + TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { + 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_free_a_readq(stcb, sq); + /*sa_ignore FREED_MEMORY*/ + } + TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { + TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); + asoc->free_chunk_cnt--; + /*sa_ignore FREED_MEMORY*/ + } + /* pending send queue SHOULD be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { + if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { + asoc->strmout[chk->rec.data.sid].chunks_on_queues--; +#ifdef INVARIANTS + } else { + panic("No chunks on the queues for sid %u.", chk->rec.data.sid); +#endif + } + TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); + if (chk->data) { + if (so) { + /* Still a socket? */ + sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, + 0, chk, SCTP_SO_LOCKED); + } + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + if (chk->whoTo) { + sctp_free_remote_addr(chk->whoTo); + chk->whoTo = NULL; + } + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + /*sa_ignore FREED_MEMORY*/ + } + /* sent queue SHOULD be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { + if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { + if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { + asoc->strmout[chk->rec.data.sid].chunks_on_queues--; +#ifdef INVARIANTS + } else { + panic("No chunks on the queues for sid %u.", chk->rec.data.sid); +#endif + } + } + TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); + if (chk->data) { + if (so) { + /* Still a socket? */ + sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, + 0, chk, SCTP_SO_LOCKED); + } + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + sctp_free_remote_addr(chk->whoTo); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + /*sa_ignore FREED_MEMORY*/ + } +#ifdef INVARIANTS + for (i = 0; i < stcb->asoc.streamoutcnt; i++) { + if (stcb->asoc.strmout[i].chunks_on_queues > 0) { + panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); + } + } +#endif + /* control queue MAY not be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { + TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + sctp_free_remote_addr(chk->whoTo); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + /*sa_ignore FREED_MEMORY*/ + } + /* ASCONF queue MAY not be empty */ + TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { + TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + if (chk->holds_key_ref) + sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); + sctp_free_remote_addr(chk->whoTo); + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); + SCTP_DECR_CHK_COUNT(); + /*sa_ignore FREED_MEMORY*/ + } + if (asoc->mapping_array) { + SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); + asoc->mapping_array = NULL; + } + if (asoc->nr_mapping_array) { + SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); + asoc->nr_mapping_array = NULL; + } + /* the stream outs */ + if (asoc->strmout) { + SCTP_FREE(asoc->strmout, SCTP_M_STRMO); + asoc->strmout = NULL; + } + asoc->strm_realoutsize = asoc->streamoutcnt = 0; + if (asoc->strmin) { + for (i = 0; i < asoc->streamincnt; i++) { + sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); + sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); + } + SCTP_FREE(asoc->strmin, SCTP_M_STRMI); + asoc->strmin = NULL; + } + asoc->streamincnt = 0; + TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { +#ifdef INVARIANTS + if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { + panic("no net's left alloc'ed, or list points to itself"); + } +#endif + TAILQ_REMOVE(&asoc->nets, net, sctp_next); + sctp_free_remote_addr(net); + } + LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { + /*sa_ignore FREED_MEMORY*/ + sctp_remove_laddr(laddr); + } + + /* pending asconf (address) parameters */ + TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { + /*sa_ignore FREED_MEMORY*/ + TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); + SCTP_FREE(aparam,SCTP_M_ASC_ADDR); + } + TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { + /*sa_ignore FREED_MEMORY*/ + TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); + if (aack->data != NULL) { + sctp_m_freem(aack->data); + } + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); + } + /* 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); + + LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { + LIST_REMOVE(shared_key, next); + sctp_free_sharedkey(shared_key); + /*sa_ignore FREED_MEMORY*/ + } + + /* Insert new items here :> */ + + /* Get rid of LOCK */ + SCTP_TCB_UNLOCK(stcb); + SCTP_TCB_LOCK_DESTROY(stcb); + if (from_inpcbfree == SCTP_NORMAL_PROC) { + SCTP_INP_INFO_WUNLOCK(); + SCTP_INP_RLOCK(inp); + } +#if defined(__APPLE__) && !defined(__Userspace__) + /* TEMP CODE */ + stcb->freed_from_where = from_location; +#endif +#ifdef SCTP_TRACK_FREED_ASOCS + if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { + /* now clean up the tasoc itself */ + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); + SCTP_DECR_ASOC_COUNT(); + } else { + LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); + } +#else + SCTP_ZONE_FREE(SCTP_BASE_INFO(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 last one) 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, + SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, + SCTP_CALLED_DIRECTLY_NOCMPSET); + SCTP_INP_DECR_REF(inp); + } else { + /* The socket is still open. */ + SCTP_INP_DECR_REF(inp); + SCTP_INP_RUNLOCK(inp); + } + } + /* 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 */ + switch (destaddr->sa_family) { +#ifdef INET6 + case AF_INET6: + answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; + break; +#endif +#ifdef INET + case AF_INET: + answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + answer = inp->ip_inp.inp.inp_vflag & INP_CONN; + break; +#endif + default: + /* invalid family, so it's unreachable */ + answer = 0; + break; + } + 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) { + SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", + __func__); + continue; + } + + if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { + continue; + } + switch (laddr->ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + inp->ip_inp.inp.inp_vflag |= INP_IPV6; + break; +#endif +#ifdef INET + case AF_INET: + inp->ip_inp.inp.inp_vflag |= INP_IPV4; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + inp->ip_inp.inp.inp_vflag |= INP_CONN; + break; +#endif + default: + break; + } + } +} + +/* + * Add the address to the endpoint local address list There is nothing to be + * done if we are bound to all addresses + */ +void +sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) +{ + struct sctp_laddr *laddr; + struct sctp_tcb *stcb; + int fnd, error = 0; + + fnd = 0; + + if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { + /* You are already bound to all. You have it already */ + return; + } +#ifdef INET6 + if (ifa->address.sa.sa_family == AF_INET6) { + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + /* Can't bind a non-useable addr. */ + return; + } + } +#endif + /* 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; + inp->laddr_count++; + /* update inp_vflag flags */ + switch (ifa->address.sa.sa_family) { +#ifdef INET6 + case AF_INET6: + inp->ip_inp.inp.inp_vflag |= INP_IPV6; + break; +#endif +#ifdef INET + case AF_INET: + inp->ip_inp.inp.inp_vflag |= INP_IPV4; + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + inp->ip_inp.inp.inp_vflag |= INP_CONN; + break; +#endif + default: + break; + } + LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { + sctp_add_local_addr_restricted(stcb, ifa); + } + } + return; +} + +/* + * 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 + */ +void +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; + } + 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; + } + 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 == laddr->ifa) { + /* Yep, purge src address selected */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + RO_NHFREE(&net->ro); +#else + sctp_rtentry_t *rt; + + /* delete this address if cached */ + rt = net->ro.ro_rt; + if (rt != NULL) { + RTFREE(rt); + net->ro.ro_rt = NULL; + } +#endif + 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; +} + +/* + * Add the address to the TCB local address restricted list. + * This is a "pending" address list (eg. addresses waiting for an + * ASCONF-ACK response) and cannot be used as a valid source address. + */ +void +sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) +{ + struct sctp_laddr *laddr; + struct sctpladdr *list; + + /* + * 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; + +#ifdef INET6 + if (ifa->address.sa.sa_family == AF_INET6) { + if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { + /* Can't bind a non-existent addr. */ + return; + } + } +#endif + /* does the address already exist? */ + LIST_FOREACH(laddr, list, sctp_nxt_addr) { + if (laddr->ifa == ifa) { + return; + } + } + + /* add to the list */ + (void)sctp_insert_laddr(list, ifa, 0); + return; +} + +/* + * Remove a local address from the TCB local address restricted list + */ +void +sctp_del_local_addr_restricted(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)) { + if (stcb->sctp_ep->laddr_count < 2) { + /* can't delete last address */ + return; + } + } + 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; + } + } + + /* address not found! */ + return; +} + +#if defined(__FreeBSD__) && !defined(__Userspace__) +/* sysctl */ +static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; +static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; +#endif + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SCTP_MCORE_INPUT) && defined(SMP) +struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; +int *sctp_cpuarry = NULL; + +void +sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) +{ + /* Queue a packet to a processor for the specified core */ + struct sctp_mcore_queue *qent; + struct sctp_mcore_ctrl *wkq; + int need_wake = 0; + + if (sctp_mcore_workers == NULL) { + /* Something went way bad during setup */ + sctp_input_with_port(m, off, 0); + return; + } + SCTP_MALLOC(qent, struct sctp_mcore_queue *, + (sizeof(struct sctp_mcore_queue)), + SCTP_M_MCORE); + if (qent == NULL) { + /* This is trouble */ + sctp_input_with_port(m, off, 0); + return; + } + qent->vn = curvnet; + qent->m = m; + qent->off = off; + qent->v6 = 0; + wkq = &sctp_mcore_workers[cpu_to_use]; + SCTP_MCORE_QLOCK(wkq); + + TAILQ_INSERT_TAIL(&wkq->que, qent, next); + if (wkq->running == 0) { + need_wake = 1; + } + SCTP_MCORE_QUNLOCK(wkq); + if (need_wake) { + wakeup(&wkq->running); + } +} + +static void +sctp_mcore_thread(void *arg) +{ + + struct sctp_mcore_ctrl *wkq; + struct sctp_mcore_queue *qent; + + wkq = (struct sctp_mcore_ctrl *)arg; + struct mbuf *m; + int off, v6; + + /* Wait for first tickle */ + SCTP_MCORE_LOCK(wkq); + wkq->running = 0; + msleep(&wkq->running, + &wkq->core_mtx, + 0, "wait for pkt", 0); + SCTP_MCORE_UNLOCK(wkq); + + /* Bind to our cpu */ + thread_lock(curthread); + sched_bind(curthread, wkq->cpuid); + thread_unlock(curthread); + + /* Now lets start working */ + SCTP_MCORE_LOCK(wkq); + /* Now grab lock and go */ + for (;;) { + SCTP_MCORE_QLOCK(wkq); + skip_sleep: + wkq->running = 1; + qent = TAILQ_FIRST(&wkq->que); + if (qent) { + TAILQ_REMOVE(&wkq->que, qent, next); + SCTP_MCORE_QUNLOCK(wkq); + CURVNET_SET(qent->vn); + m = qent->m; + off = qent->off; + v6 = qent->v6; + SCTP_FREE(qent, SCTP_M_MCORE); + if (v6 == 0) { + sctp_input_with_port(m, off, 0); + } else { + SCTP_PRINTF("V6 not yet supported\n"); + sctp_m_freem(m); + } + CURVNET_RESTORE(); + SCTP_MCORE_QLOCK(wkq); + } + wkq->running = 0; + if (!TAILQ_EMPTY(&wkq->que)) { + goto skip_sleep; + } + SCTP_MCORE_QUNLOCK(wkq); + msleep(&wkq->running, + &wkq->core_mtx, + 0, "wait for pkt", 0); + } +} + +static void +sctp_startup_mcore_threads(void) +{ + int i, cpu; + + if (mp_ncpus == 1) + return; + + if (sctp_mcore_workers != NULL) { + /* Already been here in some previous + * vnet? + */ + return; + } + SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, + ((mp_maxid+1) * sizeof(struct sctp_mcore_ctrl)), + SCTP_M_MCORE); + if (sctp_mcore_workers == NULL) { + /* TSNH I hope */ + return; + } + memset(sctp_mcore_workers, 0 , ((mp_maxid+1) * + sizeof(struct sctp_mcore_ctrl))); + /* Init the structures */ + for (i = 0; i<=mp_maxid; i++) { + TAILQ_INIT(&sctp_mcore_workers[i].que); + SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); + SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); + sctp_mcore_workers[i].cpuid = i; + } + if (sctp_cpuarry == NULL) { + SCTP_MALLOC(sctp_cpuarry, int *, + (mp_ncpus * sizeof(int)), + SCTP_M_MCORE); + i = 0; + CPU_FOREACH(cpu) { + sctp_cpuarry[i] = cpu; + i++; + } + } + /* Now start them all */ + CPU_FOREACH(cpu) { + (void)kproc_create(sctp_mcore_thread, + (void *)&sctp_mcore_workers[cpu], + &sctp_mcore_workers[cpu].thread_proc, + 0, + SCTP_KTHREAD_PAGES, + SCTP_MCORE_NAME); + } +} +#endif +#endif + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SCTP_NOT_YET) +static struct mbuf * +sctp_netisr_hdlr(struct mbuf *m, uintptr_t source) +{ + struct ip *ip; + struct sctphdr *sh; + int offset; + uint32_t flowid, tag; + + /* + * No flow id built by lower layers fix it so we + * create one. + */ + ip = mtod(m, struct ip *); + offset = (ip->ip_hl << 2) + sizeof(struct sctphdr); + if (SCTP_BUF_LEN(m) < offset) { + if ((m = m_pullup(m, offset)) == NULL) { + SCTP_STAT_INCR(sctps_hdrops); + return (NULL); + } + ip = mtod(m, struct ip *); + } + sh = (struct sctphdr *)((caddr_t)ip + (ip->ip_hl << 2)); + tag = htonl(sh->v_tag); + flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port); + m->m_pkthdr.flowid = flowid; + /* FIX ME */ + m->m_flags |= M_FLOWID; + return (m); +} + +#endif +#endif +void +#if defined(__Userspace__) +sctp_pcb_init(int start_threads) +#else +sctp_pcb_init(void) +#endif +{ + /* + * SCTP initialization for the PCB structures should be called by + * the sctp_init() function. + */ + int i; + struct timeval tv; + + if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { + /* error I was called twice */ + return; + } + SCTP_BASE_VAR(sctp_pcb_initialized) = 1; + +#if defined(SCTP_PROCESS_LEVEL_LOCKS) +#if !defined(_WIN32) + pthread_mutexattr_init(&SCTP_BASE_VAR(mtx_attr)); + pthread_rwlockattr_init(&SCTP_BASE_VAR(rwlock_attr)); +#ifdef INVARIANTS + pthread_mutexattr_settype(&SCTP_BASE_VAR(mtx_attr), PTHREAD_MUTEX_ERRORCHECK); +#endif +#endif +#endif +#if defined(SCTP_LOCAL_TRACE_BUF) +#if defined(_WIN32) && !defined(__Userspace__) + if (SCTP_BASE_SYSCTL(sctp_log) != NULL) { + memset(SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); + } +#else + memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); +#endif +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) + SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, + ((mp_maxid+1) * sizeof(struct sctpstat)), + SCTP_M_MCORE); +#endif +#endif + (void)SCTP_GETTIME_TIMEVAL(&tv); +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) + memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid+1)); + SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; + SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; +#else + memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); + SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; + SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; +#endif +#else + memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); + SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; + SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; +#endif + /* init the empty list of (All) Endpoints */ + LIST_INIT(&SCTP_BASE_INFO(listhead)); +#if defined(__APPLE__) && !defined(__Userspace__) + LIST_INIT(&SCTP_BASE_INFO(inplisthead)); +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION) + SCTP_BASE_INFO(sctbinfo).listhead = &SCTP_BASE_INFO(inplisthead); + SCTP_BASE_INFO(sctbinfo).mtx_grp_attr = lck_grp_attr_alloc_init(); + lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr); + SCTP_BASE_INFO(sctbinfo).mtx_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).mtx_grp_attr); + SCTP_BASE_INFO(sctbinfo).mtx_attr = lck_attr_alloc_init(); + lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).mtx_attr); +#else + SCTP_BASE_INFO(sctbinfo).ipi_listhead = &SCTP_BASE_INFO(inplisthead); + SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr = lck_grp_attr_alloc_init(); + lck_grp_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr); + SCTP_BASE_INFO(sctbinfo).ipi_lock_grp = lck_grp_alloc_init("sctppcb", SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr); + SCTP_BASE_INFO(sctbinfo).ipi_lock_attr = lck_attr_alloc_init(); + lck_attr_setdefault(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr); +#endif +#if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) + SCTP_BASE_INFO(sctbinfo).ipi_gc = sctp_gc; + in_pcbinfo_attach(&SCTP_BASE_INFO(sctbinfo)); +#endif +#endif + + /* init the hash table of endpoints */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); + TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); + TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); +#endif + SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), + &SCTP_BASE_INFO(hashasocmark)); + SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), + &SCTP_BASE_INFO(hashmark)); + SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), + &SCTP_BASE_INFO(hashtcpmark)); + SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); + SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, + &SCTP_BASE_INFO(hashvrfmark)); + + SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, + &SCTP_BASE_INFO(vrf_ifn_hashmark)); + /* 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(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", + sizeof(struct sctp_inpcb), maxsockets); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", + sizeof(struct sctp_tcb), sctp_max_number_of_assoc); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", + sizeof(struct sctp_laddr), + (sctp_max_number_of_assoc * sctp_scale_up_for_address)); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", + sizeof(struct sctp_nets), + (sctp_max_number_of_assoc * sctp_scale_up_for_address)); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", + sizeof(struct sctp_tmit_chunk), + (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", + sizeof(struct sctp_queued_to_read), + (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", + sizeof(struct sctp_stream_queue_pending), + (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", + sizeof(struct sctp_asconf), + (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); + + SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", + sizeof(struct sctp_asconf_ack), + (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); + + /* Master Lock INIT for info structure */ + SCTP_INP_INFO_LOCK_INIT(); + SCTP_STATLOG_INIT_LOCK(); + + SCTP_IPI_COUNT_INIT(); + SCTP_IPI_ADDR_INIT(); +#ifdef SCTP_PACKET_LOGGING + SCTP_IP_PKTLOG_INIT(); +#endif + LIST_INIT(&SCTP_BASE_INFO(addr_wq)); + + SCTP_WQ_ADDR_INIT(); + /* not sure if we need all the counts */ + SCTP_BASE_INFO(ipi_count_ep) = 0; + /* assoc/tcb zone info */ + SCTP_BASE_INFO(ipi_count_asoc) = 0; + /* local addrlist zone info */ + SCTP_BASE_INFO(ipi_count_laddr) = 0; + /* remote addrlist zone info */ + SCTP_BASE_INFO(ipi_count_raddr) = 0; + /* chunk info */ + SCTP_BASE_INFO(ipi_count_chunk) = 0; + + /* socket queue zone info */ + SCTP_BASE_INFO(ipi_count_readq) = 0; + + /* stream out queue cont */ + SCTP_BASE_INFO(ipi_count_strmoq) = 0; + + SCTP_BASE_INFO(ipi_free_strmoq) = 0; + SCTP_BASE_INFO(ipi_free_chunks) = 0; + + SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); + + /* Init the TIMEWAIT list */ + for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { + LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); + } +#if defined(SCTP_PROCESS_LEVEL_LOCKS) +#if defined(_WIN32) + InitializeConditionVariable(&sctp_it_ctl.iterator_wakeup); +#else + (void)pthread_cond_init(&sctp_it_ctl.iterator_wakeup, NULL); +#endif +#endif + sctp_startup_iterator(); + +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SCTP_MCORE_INPUT) && defined(SMP) + sctp_startup_mcore_threads(); +#endif +#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); +#if defined(__FreeBSD__) && !defined(__Userspace__) && defined(SCTP_NOT_YET) + if (ip_register_flow_handler(sctp_netisr_hdlr, IPPROTO_SCTP)) { + SCTP_PRINTF("***SCTP- Error can't register netisr handler***\n"); + } +#endif +#if defined(_SCTP_NEEDS_CALLOUT_) || defined(_USER_SCTP_NEEDS_CALLOUT_) + /* allocate the lock for the callout/timer queue */ + SCTP_TIMERQ_LOCK_INIT(); + TAILQ_INIT(&SCTP_BASE_INFO(callqueue)); +#endif +#if defined(__Userspace__) + mbuf_initialize(NULL); + atomic_init(); +#if defined(INET) || defined(INET6) + if (start_threads) + recv_thread_init(); +#endif +#endif +} + +/* + * Assumes that the SCTP_BASE_INFO() lock is NOT held. + */ +void +sctp_pcb_finish(void) +{ + struct sctp_vrflist *vrf_bucket; + struct sctp_vrf *vrf, *nvrf; + struct sctp_ifn *ifn, *nifn; + struct sctp_ifa *ifa, *nifa; + struct sctpvtaghead *chain; + struct sctp_tagblock *twait_block, *prev_twait_block; + struct sctp_laddr *wi, *nwi; + int i; + struct sctp_iterator *it, *nit; + + if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { + SCTP_PRINTF("%s: race condition on teardown.\n", __func__); + return; + } + SCTP_BASE_VAR(sctp_pcb_initialized) = 0; +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + /* Notify the iterator to exit. */ + SCTP_IPI_ITERATOR_WQ_LOCK(); + sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_MUST_EXIT; + sctp_wakeup_iterator(); + SCTP_IPI_ITERATOR_WQ_UNLOCK(); +#endif +#if defined(__APPLE__) && !defined(__Userspace__) +#if !defined(APPLE_LEOPARD) && !defined(APPLE_SNOWLEOPARD) && !defined(APPLE_LION) && !defined(APPLE_MOUNTAINLION) + in_pcbinfo_detach(&SCTP_BASE_INFO(sctbinfo)); +#endif + SCTP_IPI_ITERATOR_WQ_LOCK(); + do { + msleep(&sctp_it_ctl.iterator_flags, + sctp_it_ctl.ipi_iterator_wq_mtx, + 0, "waiting_for_work", 0); + } while ((sctp_it_ctl.iterator_flags & SCTP_ITERATOR_EXITED) == 0); + thread_deallocate(sctp_it_ctl.thread_proc); + SCTP_IPI_ITERATOR_WQ_UNLOCK(); +#endif +#if defined(_WIN32) && !defined(__Userspace__) + if (sctp_it_ctl.iterator_thread_obj != NULL) { + NTSTATUS status = STATUS_SUCCESS; + + KeSetEvent(&sctp_it_ctl.iterator_wakeup[1], IO_NO_INCREMENT, FALSE); + status = KeWaitForSingleObject(sctp_it_ctl.iterator_thread_obj, + Executive, + KernelMode, + FALSE, + NULL); + ObDereferenceObject(sctp_it_ctl.iterator_thread_obj); + } +#endif +#if defined(__Userspace__) + if (SCTP_BASE_VAR(iterator_thread_started)) { +#if defined(_WIN32) + WaitForSingleObject(sctp_it_ctl.thread_proc, INFINITE); + CloseHandle(sctp_it_ctl.thread_proc); + sctp_it_ctl.thread_proc = NULL; +#else + pthread_join(sctp_it_ctl.thread_proc, NULL); + sctp_it_ctl.thread_proc = 0; +#endif + } +#endif +#if defined(SCTP_PROCESS_LEVEL_LOCKS) +#if defined(_WIN32) + DeleteConditionVariable(&sctp_it_ctl.iterator_wakeup); +#else + pthread_cond_destroy(&sctp_it_ctl.iterator_wakeup); + pthread_mutexattr_destroy(&SCTP_BASE_VAR(mtx_attr)); + pthread_rwlockattr_destroy(&SCTP_BASE_VAR(rwlock_attr)); +#endif +#endif + /* In FreeBSD the iterator thread never exits + * but we do clean up. + * The only way FreeBSD reaches here is if we have VRF's + * but we still add the ifdef to make it compile on old versions. + */ +#if defined(__FreeBSD__) && !defined(__Userspace__) +retry: +#endif + SCTP_IPI_ITERATOR_WQ_LOCK(); +#if defined(__FreeBSD__) && !defined(__Userspace__) + /* + * sctp_iterator_worker() might be working on an it entry without + * holding the lock. We won't find it on the list either and + * continue and free/destroy it. While holding the lock, spin, to + * avoid the race condition as sctp_iterator_worker() will have to + * wait to re-acquire the lock. + */ + if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { + SCTP_IPI_ITERATOR_WQ_UNLOCK(); + SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " + "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); + DELAY(10); + goto retry; + } +#endif + TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { +#if defined(__FreeBSD__) && !defined(__Userspace__) + if (it->vn != curvnet) { + continue; + } +#endif + TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); + if (it->function_atend != NULL) { + (*it->function_atend) (it->pointer, it->val); + } + SCTP_FREE(it,SCTP_M_ITER); + } + SCTP_IPI_ITERATOR_WQ_UNLOCK(); +#if defined(__FreeBSD__) && !defined(__Userspace__) + SCTP_ITERATOR_LOCK(); + if ((sctp_it_ctl.cur_it) && + (sctp_it_ctl.cur_it->vn == curvnet)) { + sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; + } + SCTP_ITERATOR_UNLOCK(); +#endif +#if !(defined(__FreeBSD__) && !defined(__Userspace__)) + SCTP_IPI_ITERATOR_WQ_DESTROY(); + SCTP_ITERATOR_LOCK_DESTROY(); +#endif + SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); + SCTP_WQ_ADDR_LOCK(); + LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { + LIST_REMOVE(wi, sctp_nxt_addr); + SCTP_DECR_LADDR_COUNT(); + if (wi->action == SCTP_DEL_IP_ADDRESS) { + SCTP_FREE(wi->ifa, SCTP_M_IFA); + } + SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); + } + SCTP_WQ_ADDR_UNLOCK(); + + /* + * free the vrf/ifn/ifa lists and hashes (be sure address monitor + * is destroyed first). + */ + SCTP_IPI_ADDR_WLOCK(); + vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; + LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { + LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { + LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { + /* free the ifa */ + LIST_REMOVE(ifa, next_bucket); + LIST_REMOVE(ifa, next_ifa); + SCTP_FREE(ifa, SCTP_M_IFA); + } + /* free the ifn */ + LIST_REMOVE(ifn, next_bucket); + LIST_REMOVE(ifn, next_ifn); + SCTP_FREE(ifn, SCTP_M_IFN); + } + SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); + /* free the vrf */ + LIST_REMOVE(vrf, next_vrf); + SCTP_FREE(vrf, SCTP_M_VRF); + } + SCTP_IPI_ADDR_WUNLOCK(); + /* free the vrf hashes */ + SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); + SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); + + /* free the TIMEWAIT list elements malloc'd in the function + * sctp_add_vtag_to_timewait()... + */ + for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { + chain = &SCTP_BASE_INFO(vtag_timewait)[i]; + if (!LIST_EMPTY(chain)) { + prev_twait_block = NULL; + LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { + if (prev_twait_block) { + SCTP_FREE(prev_twait_block, SCTP_M_TIMW); + } + prev_twait_block = twait_block; + } + SCTP_FREE(prev_twait_block, SCTP_M_TIMW); + } + } + + /* free the locks and mutexes */ +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_TIMERQ_LOCK_DESTROY(); +#endif +#ifdef SCTP_PACKET_LOGGING + SCTP_IP_PKTLOG_DESTROY(); +#endif + SCTP_IPI_ADDR_DESTROY(); +#if defined(__APPLE__) && !defined(__Userspace__) + SCTP_IPI_COUNT_DESTROY(); +#endif + SCTP_STATLOG_DESTROY(); + SCTP_INP_INFO_LOCK_DESTROY(); + + SCTP_WQ_ADDR_DESTROY(); + +#if defined(__APPLE__) && !defined(__Userspace__) +#if defined(APPLE_LEOPARD) || defined(APPLE_SNOWLEOPARD) || defined(APPLE_LION) || defined(APPLE_MOUNTAINLION) + lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_grp_attr); + lck_grp_free(SCTP_BASE_INFO(sctbinfo).mtx_grp); + lck_attr_free(SCTP_BASE_INFO(sctbinfo).mtx_attr); +#else + lck_grp_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp_attr); + lck_grp_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_grp); + lck_attr_free(SCTP_BASE_INFO(sctbinfo).ipi_lock_attr); +#endif +#endif +#if defined(__Userspace__) + SCTP_TIMERQ_LOCK_DESTROY(); + SCTP_ZONE_DESTROY(zone_mbuf); + SCTP_ZONE_DESTROY(zone_clust); + SCTP_ZONE_DESTROY(zone_ext_refcnt); +#endif + /* Get rid of other stuff too. */ + if (SCTP_BASE_INFO(sctp_asochash) != NULL) + SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); + if (SCTP_BASE_INFO(sctp_ephash) != NULL) + SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); + if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) + SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); + +#if defined(_WIN32) || defined(__FreeBSD__) || defined(__Userspace__) + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); + SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); +#endif +#if defined(__FreeBSD__) && !defined(__Userspace__) +#if defined(SMP) && defined(SCTP_USE_PERCPU_STAT) + SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); +#endif +#endif +} + +int +sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, + int offset, int limit, + struct sockaddr *src, struct sockaddr *dst, + struct sockaddr *altsa, uint16_t port) +{ + /* + * 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; + struct sctp_nets *net, *nnet, *net_tmp; + struct sctp_paramhdr *phdr, param_buf; + struct sctp_tcb *stcb_tmp; + uint16_t ptype, plen; + struct sockaddr *sa; + uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; + struct sctp_auth_random *p_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 saw_asconf = 0; + uint8_t saw_asconf_ack = 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; + uint8_t peer_supports_ecn; + uint8_t peer_supports_prsctp; + uint8_t peer_supports_auth; + uint8_t peer_supports_asconf; + uint8_t peer_supports_asconf_ack; + uint8_t peer_supports_reconfig; + uint8_t peer_supports_nrsack; + uint8_t peer_supports_pktdrop; + uint8_t peer_supports_idata; +#ifdef INET + struct sockaddr_in sin; +#endif +#ifdef INET6 + struct sockaddr_in6 sin6; +#endif + + /* First get the destination address setup too. */ +#ifdef INET + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; +#ifdef HAVE_SIN_LEN + sin.sin_len = sizeof(sin); +#endif + sin.sin_port = stcb->rport; +#endif +#ifdef INET6 + memset(&sin6, 0, sizeof(sin6)); + sin6.sin6_family = AF_INET6; +#ifdef HAVE_SIN6_LEN + sin6.sin6_len = sizeof(struct sockaddr_in6); +#endif + sin6.sin6_port = stcb->rport; +#endif + if (altsa) { + sa = altsa; + } else { + sa = src; + } + peer_supports_idata = 0; + peer_supports_ecn = 0; + peer_supports_prsctp = 0; + peer_supports_auth = 0; + peer_supports_asconf = 0; + peer_supports_asconf_ack = 0; + peer_supports_reconfig = 0; + peer_supports_nrsack = 0; + peer_supports_pktdrop = 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 */ + inp = stcb->sctp_ep; + atomic_add_int(&stcb->asoc.refcnt, 1); + stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); + atomic_subtract_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. */ + switch (sa->sa_family) { +#ifdef INET + case AF_INET: + if (stcb->asoc.scope.ipv4_addr_legal) { + if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { + return (-1); + } + } + break; +#endif +#ifdef INET6 + case AF_INET6: + if (stcb->asoc.scope.ipv6_addr_legal) { + if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { + return (-2); + } + } + break; +#endif +#if defined(__Userspace__) + case AF_CONN: + if (stcb->asoc.scope.conn_addr_legal) { + if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { + return (-2); + } + } + break; +#endif + default: + break; + } + } 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? */ + if (stcb_tmp) + 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, ¶m_buf, sizeof(param_buf)); + while (phdr) { + ptype = ntohs(phdr->param_type); + plen = ntohs(phdr->param_length); + /* + * SCTP_PRINTF("ptype => %0x, plen => %d\n", (uint32_t)ptype, + * (int)plen); + */ + if (offset + plen > limit) { + break; + } + if (plen < sizeof(struct sctp_paramhdr)) { + break; + } +#ifdef INET + if (ptype == SCTP_IPV4_ADDRESS) { + if (stcb->asoc.scope.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; + if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { + /* Skip multi-cast addresses */ + goto next_param; + } + if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || + (sin.sin_addr.s_addr == INADDR_ANY)) { + goto next_param; + } + sa = (struct sockaddr *)&sin; + inp = stcb->sctp_ep; + atomic_add_int(&stcb->asoc.refcnt, 1); + stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, + dst, stcb); + atomic_subtract_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 + */ + add_it_now: + if (stcb->asoc.state == 0) { + /* the assoc was freed? */ + return (-7); + } + if (sctp_add_remote_addr(stcb, sa, NULL, port, 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_tmp) { + if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { + struct mbuf *op_err; + char msg[SCTP_DIAG_INFO_LEN]; + + /* in setup state we abort this guy */ + SCTP_SNPRINTF(msg, sizeof(msg), + "%s:%d at %s", __FILE__, __LINE__, __func__); + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + msg); + sctp_abort_an_association(stcb_tmp->sctp_ep, + stcb_tmp, op_err, false, + SCTP_SO_NOT_LOCKED); + goto add_it_now; + } + SCTP_TCB_UNLOCK(stcb_tmp); + } + + if (stcb->asoc.state == 0) { + /* the assoc was freed? */ + return (-12); + } + return (-13); + } + } + } else +#endif +#ifdef INET6 + if (ptype == SCTP_IPV6_ADDRESS) { + if (stcb->asoc.scope.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)); + if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { + /* Skip multi-cast addresses */ + goto next_param; + } + if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { + /* Link local make no sense without scope */ + goto next_param; + } + sa = (struct sockaddr *)&sin6; + inp = stcb->sctp_ep; + atomic_add_int(&stcb->asoc.refcnt, 1); + stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, + dst, stcb); + atomic_subtract_int(&stcb->asoc.refcnt, 1); + if (stcb_tmp == NULL && + (inp == stcb->sctp_ep || inp == NULL)) { + /* + * we must validate the state again + * here + */ + add_it_now6: + 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, NULL, port, 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_tmp) { + if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { + struct mbuf *op_err; + char msg[SCTP_DIAG_INFO_LEN]; + + /* in setup state we abort this guy */ + SCTP_SNPRINTF(msg, sizeof(msg), + "%s:%d at %s", __FILE__, __LINE__, __func__); + op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), + msg); + sctp_abort_an_association(stcb_tmp->sctp_ep, + stcb_tmp, op_err, false, + SCTP_SO_NOT_LOCKED); + goto add_it_now6; + } + SCTP_TCB_UNLOCK(stcb_tmp); + } + if (stcb->asoc.state == 0) { + /* the assoc was freed? */ + return (-21); + } + return (-22); + } + } + } else +#endif + if (ptype == SCTP_ECN_CAPABLE) { + peer_supports_ecn = 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; + if (aip) { + stcb->asoc.peers_adaptation = ntohl(aip->indication); + stcb->asoc.adaptation_needed = 1; + } + } + } else if (ptype == SCTP_SET_PRIM_ADDR) { + struct sctp_asconf_addr_param lstore, *fee; + int lptype; + struct sockaddr *lsa = NULL; +#ifdef INET + struct sctp_asconf_addrv4_param *fii; +#endif + + if (stcb->asoc.asconf_supported == 0) { + return (-100); + } + if (plen > sizeof(lstore)) { + return (-23); + } + if (plen < sizeof(struct sctp_asconf_addrv4_param)) { + return (-101); + } + 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); + switch (lptype) { +#ifdef INET + case SCTP_IPV4_ADDRESS: + if (plen != + sizeof(struct sctp_asconf_addrv4_param)) { + SCTP_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; + } + break; +#endif +#ifdef INET6 + case SCTP_IPV6_ADDRESS: + if (plen != + sizeof(struct sctp_asconf_addr_param)) { + SCTP_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; + } + break; +#endif + default: + break; + } + if (lsa) { + (void)sctp_set_primary_addr(stcb, sa, NULL); + } + } else if (ptype == SCTP_HAS_NAT_SUPPORT) { + stcb->asoc.peer_supports_nat = 1; + } else if (ptype == SCTP_PRSCTP_SUPPORTED) { + /* Peer supports pr-sctp */ + peer_supports_prsctp = 1; + } else if (ptype == SCTP_ZERO_CHECKSUM_ACCEPTABLE) { + /* + * Only send zero checksums if the upper layer has + * also enabled the support for this. + */ + if (stcb->asoc.zero_checksum == 1) { + stcb->asoc.zero_checksum = 2; + } + } 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; + + if (plen > sizeof(local_store)) { + return (-35); + } + phdr = sctp_get_next_param(m, offset, + (struct sctp_paramhdr *)&local_store, plen); + if (phdr == NULL) { + return (-25); + } + 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: + peer_supports_asconf = 1; + break; + case SCTP_ASCONF_ACK: + peer_supports_asconf_ack = 1; + break; + case SCTP_FORWARD_CUM_TSN: + peer_supports_prsctp = 1; + break; + case SCTP_PACKET_DROPPED: + peer_supports_pktdrop = 1; + break; + case SCTP_NR_SELECTIVE_ACK: + peer_supports_nrsack = 1; + break; + case SCTP_STREAM_RESET: + peer_supports_reconfig = 1; + break; + case SCTP_AUTHENTICATION: + peer_supports_auth = 1; + break; + case SCTP_IDATA: + peer_supports_idata = 1; + break; + default: + /* one I have not learned yet */ + break; + } + } + } 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); + p_random = (struct sctp_auth_random *)phdr; + random_len = plen - sizeof(*p_random); + /* enforce the random length */ + if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { + SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); + return (-27); + } + got_random = 1; + } else if (ptype == SCTP_HMAC_LIST) { + uint16_t num_hmacs; + uint16_t 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++) { + (void)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++) { + (void)sctp_auth_add_chunk(chunks->chunk_types[i], + stcb->asoc.peer_auth_chunks); + /* record asconf/asconf-ack if listed */ + if (chunks->chunk_types[i] == SCTP_ASCONF) + saw_asconf = 1; + if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) + saw_asconf_ack = 1; + } + 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, ¶m_buf, + sizeof(param_buf)); + } + /* Now check to see if we need to purge any addresses */ + TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { + 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); + if (net == stcb->asoc.alternate) { + sctp_free_remote_addr(stcb->asoc.alternate); + stcb->asoc.alternate = NULL; + } + if (net == stcb->asoc.primary_destination) { + stcb->asoc.primary_destination = NULL; + sctp_select_primary_destination(stcb); + } + sctp_free_remote_addr(net); + } + } + if ((stcb->asoc.ecn_supported == 1) && + (peer_supports_ecn == 0)) { + stcb->asoc.ecn_supported = 0; + } + if ((stcb->asoc.prsctp_supported == 1) && + (peer_supports_prsctp == 0)) { + stcb->asoc.prsctp_supported = 0; + } + if ((stcb->asoc.auth_supported == 1) && + ((peer_supports_auth == 0) || + (got_random == 0) || (got_hmacs == 0))) { + stcb->asoc.auth_supported = 0; + } + if ((stcb->asoc.asconf_supported == 1) && + ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || + (stcb->asoc.auth_supported == 0) || + (saw_asconf == 0) || (saw_asconf_ack == 0))) { + stcb->asoc.asconf_supported = 0; + } + if ((stcb->asoc.reconfig_supported == 1) && + (peer_supports_reconfig == 0)) { + stcb->asoc.reconfig_supported = 0; + } + if ((stcb->asoc.idata_supported == 1) && + (peer_supports_idata == 0)) { + stcb->asoc.idata_supported = 0; + } + if ((stcb->asoc.nrsack_supported == 1) && + (peer_supports_nrsack == 0)) { + stcb->asoc.nrsack_supported = 0; + } + if ((stcb->asoc.pktdrop_supported == 1) && + (peer_supports_pktdrop == 0)) { + stcb->asoc.pktdrop_supported = 0; + } + /* validate authentication required parameters */ + if ((peer_supports_auth == 0) && (got_chklist == 1)) { + /* peer does not support auth but sent a chunks list? */ + return (-31); + } + if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { + /* peer supports asconf but not auth? */ + return (-32); + } else if ((peer_supports_asconf == 1) && + (peer_supports_auth == 1) && + ((saw_asconf == 0) || (saw_asconf_ack == 0))) { + return (-33); + } + /* concatenate the full random key */ + keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; + if (chunks != NULL) { + keylen += sizeof(*chunks) + num_chunks; + } + new_key = sctp_alloc_key(keylen); + if (new_key != NULL) { + /* copy in the RANDOM */ + if (p_random != NULL) { + keylen = sizeof(*p_random) + random_len; + memcpy(new_key->key, p_random, keylen); + } else { + keylen = 0; + } + /* append in the AUTH chunks */ + if (chunks != NULL) { + memcpy(new_key->key + keylen, chunks, + sizeof(*chunks) + num_chunks); + keylen += sizeof(*chunks) + num_chunks; + } + /* append in the HMACs */ + if (hmacs != NULL) { + memcpy(new_key->key + keylen, hmacs, + sizeof(*hmacs) + hmacs_len); + } + } else { + /* failed to get memory for the key */ + return (-34); + } + if (stcb->asoc.authinfo.peer_random != NULL) + sctp_free_key(stcb->asoc.authinfo.peer_random); + stcb->asoc.authinfo.peer_random = new_key; + 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; + if (((net->dest_state & SCTP_ADDR_PF) == 0) && + (stcb->asoc.alternate != NULL)) { + sctp_free_remote_addr(stcb->asoc.alternate); + stcb->asoc.alternate = NULL; + } + 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 efficient 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); + } +} + +bool +sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) +{ + struct sctpasochead *head; + struct sctp_tcb *stcb; + + SCTP_INP_INFO_LOCK_ASSERT(); + + head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, SCTP_BASE_INFO(hashasocmark))]; + LIST_FOREACH(stcb, head, sctp_asocs) { + /* We choose not to lock anything here. TCB's can't be + * removed since we have the read lock, so they can't + * be freed on us, same thing for the INP. I may + * be wrong with this assumption, but we will go + * with it for now :-) + */ + if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { + continue; + } + if (stcb->asoc.my_vtag == tag) { + /* candidate */ + if (stcb->rport != rport) { + continue; + } + if (stcb->sctp_ep->sctp_lport != lport) { + continue; + } + /* The tag is currently used, so don't use it. */ + return (false); + } + } + return (!sctp_is_in_timewait(tag, lport, rport, (uint32_t)now->tv_sec)); +} + +static void +sctp_drain_mbufs(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; + struct sctp_queued_to_read *control, *ncontrol; + int cnt, strmat; + uint32_t gap, i; + int fnd = 0; + + /* We look for anything larger than the cum-ack + 1 */ + + 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; + /* Ok that was fun, now we will drain all the inbound streams? */ + for (strmat = 0; strmat < asoc->streamincnt; strmat++) { + TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { +#ifdef INVARIANTS + if (control->on_strm_q != SCTP_ON_ORDERED) { + panic("Huh control: %p on_q: %d -- not ordered?", + control, control->on_strm_q); + } +#endif + if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { + /* Yep it is above cum-ack */ + cnt++; + SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); + KASSERT(control->length > 0, ("control has zero length")); + if (asoc->size_on_all_streams >= control->length) { + asoc->size_on_all_streams -= control->length; + } else { +#ifdef INVARIANTS + panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); +#else + asoc->size_on_all_streams = 0; +#endif + } + sctp_ucount_decr(asoc->cnt_on_all_streams); + SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); + if (control->on_read_q) { + TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); + control->on_read_q = 0; + } + TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); + control->on_strm_q = 0; + if (control->data) { + sctp_m_freem(control->data); + control->data = NULL; + } + sctp_free_remote_addr(control->whoFrom); + /* Now its reasm? */ + TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { + cnt++; + SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); + KASSERT(chk->send_size > 0, ("chunk has zero length")); + if (asoc->size_on_reasm_queue >= chk->send_size) { + asoc->size_on_reasm_queue -= chk->send_size; + } else { +#ifdef INVARIANTS + panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); +#else + asoc->size_on_reasm_queue = 0; +#endif + } + sctp_ucount_decr(asoc->cnt_on_reasm_queue); + SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); + TAILQ_REMOVE(&control->reasm, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + } + sctp_free_a_readq(stcb, control); + } + } + TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { +#ifdef INVARIANTS + if (control->on_strm_q != SCTP_ON_UNORDERED) { + panic("Huh control: %p on_q: %d -- not unordered?", + control, control->on_strm_q); + } +#endif + if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { + /* Yep it is above cum-ack */ + cnt++; + SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); + KASSERT(control->length > 0, ("control has zero length")); + if (asoc->size_on_all_streams >= control->length) { + asoc->size_on_all_streams -= control->length; + } else { +#ifdef INVARIANTS + panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); +#else + asoc->size_on_all_streams = 0; +#endif + } + sctp_ucount_decr(asoc->cnt_on_all_streams); + SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); + if (control->on_read_q) { + TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); + control->on_read_q = 0; + } + TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); + control->on_strm_q = 0; + if (control->data) { + sctp_m_freem(control->data); + control->data = NULL; + } + sctp_free_remote_addr(control->whoFrom); + /* Now its reasm? */ + TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { + cnt++; + SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); + KASSERT(chk->send_size > 0, ("chunk has zero length")); + if (asoc->size_on_reasm_queue >= chk->send_size) { + asoc->size_on_reasm_queue -= chk->send_size; + } else { +#ifdef INVARIANTS + panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); +#else + asoc->size_on_reasm_queue = 0; +#endif + } + sctp_ucount_decr(asoc->cnt_on_reasm_queue); + SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); + TAILQ_REMOVE(&control->reasm, chk, sctp_next); + if (chk->data) { + sctp_m_freem(chk->data); + chk->data = NULL; + } + sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); + } + sctp_free_a_readq(stcb, control); + } + } + } + if (cnt) { + /* We must back down to see what the new highest is */ + for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { + SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); + if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { + asoc->highest_tsn_inside_map = i; + fnd = 1; + break; + } + } + if (!fnd) { + asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; + } + + /* + * 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 + SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); +#endif + /* + * Now do we need to find a new + * asoc->highest_tsn_inside_map? + */ + asoc->last_revoke_count = cnt; + sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, + SCTP_FROM_SCTP_PCB + SCTP_LOC_11); + /*sa_ignore NO_NULL_CHK*/ + sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); + sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); + } + /* + * Another issue, in un-setting the TSN's in the mapping array we + * DID NOT adjust the highest_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. + */ +} + +#if defined(__FreeBSD__) && !defined(__Userspace__) +static void +#else +void +#endif +sctp_drain(void) +{ +#if defined(__FreeBSD__) && !defined(__Userspace__) + struct epoch_tracker et; + VNET_ITERATOR_DECL(vnet_iter); + + NET_EPOCH_ENTER(et); +#else + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; + + SCTP_STAT_INCR(sctps_protocol_drain_calls); + if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { + return; + } +#endif + /* + * 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! + */ +#if defined(__FreeBSD__) && !defined(__Userspace__) + VNET_LIST_RLOCK_NOSLEEP(); + VNET_FOREACH(vnet_iter) { + CURVNET_SET(vnet_iter); + struct sctp_inpcb *inp; + struct sctp_tcb *stcb; +#endif + +#if defined(__FreeBSD__) && !defined(__Userspace__) + SCTP_STAT_INCR(sctps_protocol_drain_calls); + if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { +#ifdef VIMAGE + continue; +#else + NET_EPOCH_EXIT(et); + return; +#endif + } +#endif + SCTP_INP_INFO_RLOCK(); + LIST_FOREACH(inp, &SCTP_BASE_INFO(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(stcb); + SCTP_TCB_UNLOCK(stcb); + } + SCTP_INP_RUNLOCK(inp); + } + SCTP_INP_INFO_RUNLOCK(); +#if defined(__FreeBSD__) && !defined(__Userspace__) + CURVNET_RESTORE(); + } + VNET_LIST_RUNLOCK_NOSLEEP(); + NET_EPOCH_EXIT(et); +#endif +} +#if defined(__FreeBSD__) && !defined(__Userspace__) +EVENTHANDLER_DEFINE(vm_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); +EVENTHANDLER_DEFINE(mbuf_lowmem, sctp_drain, NULL, LOWMEM_PRI_DEFAULT); +#endif + +/* + * 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. inpe (optional) is called when the inp completes + * its way through all the stcbs. + */ +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); + } + if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { + SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, + SCTP_BASE_VAR(sctp_pcb_initialized)); + return (-1); + } + SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), + SCTP_M_ITER); + if (it == NULL) { + SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); + return (-1); + } + 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 defined(__FreeBSD__) && !defined(__Userspace__) + it->vn = curvnet; +#endif + if (s_inp) { + /* Assume lock is held here */ + it->inp = s_inp; + SCTP_INP_INCR_REF(it->inp); + it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; + } else { + SCTP_INP_INFO_RLOCK(); + it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); + if (it->inp) { + SCTP_INP_INCR_REF(it->inp); + } + SCTP_INP_INFO_RUNLOCK(); + it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; + } + SCTP_IPI_ITERATOR_WQ_LOCK(); + if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { + SCTP_IPI_ITERATOR_WQ_UNLOCK(); + SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, + SCTP_BASE_VAR(sctp_pcb_initialized), it); + SCTP_FREE(it, SCTP_M_ITER); + return (-1); + } + TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); + if (sctp_it_ctl.iterator_running == 0) { + sctp_wakeup_iterator(); + } + SCTP_IPI_ITERATOR_WQ_UNLOCK(); + /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ + return (0); +} + +/* + * Atomically add flags to the sctp_flags of an inp. + * To be used when the write lock of the inp is not held. + */ +void +sctp_pcb_add_flags(struct sctp_inpcb *inp, uint32_t flags) +{ + uint32_t old_flags, new_flags; + + do { + old_flags = inp->sctp_flags; + new_flags = old_flags | flags; + } while (atomic_cmpset_int(&inp->sctp_flags, old_flags, new_flags) == 0); +} |