6164 lines
176 KiB
C
6164 lines
176 KiB
C
/*-
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* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/sctp_os.h>
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#include <sys/proc.h>
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_sysctl.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp.h>
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#include <netinet/sctp_header.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctp_bsd_addr.h>
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struct sctp_epinfo sctppcbinfo;
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/* FIX: we don't handle multiple link local scopes */
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/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
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int
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SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b)
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{
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struct in6_addr tmp_a, tmp_b;
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/* use a copy of a and b */
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tmp_a = *a;
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tmp_b = *b;
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in6_clearscope(&tmp_a);
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in6_clearscope(&tmp_b);
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return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b));
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}
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void
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sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
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{
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/*
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* We really don't need to lock this, but I will just because it
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* does not hurt.
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*/
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SCTP_INP_INFO_RLOCK();
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spcb->ep_count = sctppcbinfo.ipi_count_ep;
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spcb->asoc_count = sctppcbinfo.ipi_count_asoc;
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spcb->laddr_count = sctppcbinfo.ipi_count_laddr;
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spcb->raddr_count = sctppcbinfo.ipi_count_raddr;
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spcb->chk_count = sctppcbinfo.ipi_count_chunk;
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spcb->readq_count = sctppcbinfo.ipi_count_readq;
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spcb->stream_oque = sctppcbinfo.ipi_count_strmoq;
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spcb->free_chunks = sctppcbinfo.ipi_free_chunks;
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SCTP_INP_INFO_RUNLOCK();
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}
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/*
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* Addresses are added to VRF's (Virtual Router's). For BSD we
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* have only the default VRF 0. We maintain a hash list of
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* VRF's. Each VRF has its own list of sctp_ifn's. Each of
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* these has a list of addresses. When we add a new address
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* to a VRF we lookup the ifn/ifn_index, if the ifn does
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* not exist we create it and add it to the list of IFN's
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* within the VRF. Once we have the sctp_ifn, we add the
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* address to the list. So we look something like:
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*
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* hash-vrf-table
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* vrf-> ifn-> ifn -> ifn
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* vrf |
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* ... +--ifa-> ifa -> ifa
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* vrf
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*
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* We keep these seperate lists since the SCTP subsystem will
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* point to these from its source address selection nets structure.
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* When an address is deleted it does not happen right away on
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* the SCTP side, it gets scheduled. What we do when a
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* delete happens is immediately remove the address from
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* the master list and decrement the refcount. As our
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* addip iterator works through and frees the src address
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* selection pointing to the sctp_ifa, eventually the refcount
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* will reach 0 and we will delete it. Note that it is assumed
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* that any locking on system level ifn/ifa is done at the
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* caller of these functions and these routines will only
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* lock the SCTP structures as they add or delete things.
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*
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* Other notes on VRF concepts.
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* - An endpoint can be in multiple VRF's
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* - An association lives within a VRF and only one VRF.
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* - Any incoming packet we can deduce the VRF for by
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* looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
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* - Any downward send call or connect call must supply the
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* VRF via ancillary data or via some sort of set default
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* VRF socket option call (again for BSD no brainer since
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* the VRF is always 0).
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* - An endpoint may add multiple VRF's to it.
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* - Listening sockets can accept associations in any
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* of the VRF's they are in but the assoc will end up
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* in only one VRF (gotten from the packet or connect/send).
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*
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*/
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struct sctp_vrf *
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sctp_allocate_vrf(int vrf_id)
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{
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struct sctp_vrf *vrf = NULL;
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struct sctp_vrflist *bucket;
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/* First allocate the VRF structure */
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vrf = sctp_find_vrf(vrf_id);
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if (vrf) {
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/* Already allocated */
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return (vrf);
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}
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SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
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SCTP_M_VRF);
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if (vrf == NULL) {
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/* No memory */
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#ifdef INVARIANTS
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panic("No memory for VRF:%d", vrf_id);
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#endif
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return (NULL);
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}
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/* setup the VRF */
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memset(vrf, 0, sizeof(struct sctp_vrf));
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vrf->vrf_id = vrf_id;
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LIST_INIT(&vrf->ifnlist);
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vrf->total_ifa_count = 0;
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vrf->refcount = 0;
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/* now also setup table ids */
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SCTP_INIT_VRF_TABLEID(vrf);
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/* Init the HASH of addresses */
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vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
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&vrf->vrf_addr_hashmark);
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if (vrf->vrf_addr_hash == NULL) {
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/* No memory */
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#ifdef INVARIANTS
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panic("No memory for VRF:%d", vrf_id);
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#endif
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SCTP_FREE(vrf, SCTP_M_VRF);
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return (NULL);
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}
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/* Add it to the hash table */
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bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
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LIST_INSERT_HEAD(bucket, vrf, next_vrf);
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atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1);
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return (vrf);
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}
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struct sctp_ifn *
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sctp_find_ifn(void *ifn, uint32_t ifn_index)
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{
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struct sctp_ifn *sctp_ifnp;
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struct sctp_ifnlist *hash_ifn_head;
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/*
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* We assume the lock is held for the addresses if thats wrong
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* problems could occur :-)
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*/
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hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
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LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
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if (sctp_ifnp->ifn_index == ifn_index) {
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return (sctp_ifnp);
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}
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if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
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return (sctp_ifnp);
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}
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}
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return (NULL);
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}
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struct sctp_vrf *
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sctp_find_vrf(uint32_t vrf_id)
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{
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struct sctp_vrflist *bucket;
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struct sctp_vrf *liste;
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bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)];
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LIST_FOREACH(liste, bucket, next_vrf) {
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if (vrf_id == liste->vrf_id) {
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return (liste);
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}
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}
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return (NULL);
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}
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void
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sctp_free_vrf(struct sctp_vrf *vrf)
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{
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int ret;
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ret = atomic_fetchadd_int(&vrf->refcount, -1);
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if (ret == 1) {
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/* We zero'd the count */
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LIST_REMOVE(vrf, next_vrf);
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SCTP_FREE(vrf, SCTP_M_VRF);
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atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1);
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}
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}
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void
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sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
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{
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int ret;
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ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1);
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if (ret == 1) {
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/* We zero'd the count */
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if (sctp_ifnp->vrf) {
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sctp_free_vrf(sctp_ifnp->vrf);
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}
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SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
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atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1);
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}
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}
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void
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sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
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{
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struct sctp_ifn *sctp_ifnp;
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sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
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if (sctp_ifnp != NULL) {
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sctp_ifnp->ifn_mtu = mtu;
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}
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}
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void
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sctp_free_ifa(struct sctp_ifa *sctp_ifap)
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{
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int ret;
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ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1);
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if (ret == 1) {
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/* We zero'd the count */
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if (sctp_ifap->ifn_p) {
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sctp_free_ifn(sctp_ifap->ifn_p);
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}
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SCTP_FREE(sctp_ifap, SCTP_M_IFA);
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atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1);
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}
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}
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static void
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sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
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{
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struct sctp_ifn *found;
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found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
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if (found == NULL) {
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/* Not in the list.. sorry */
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return;
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}
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if (hold_addr_lock == 0)
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SCTP_IPI_ADDR_WLOCK();
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LIST_REMOVE(sctp_ifnp, next_bucket);
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LIST_REMOVE(sctp_ifnp, next_ifn);
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SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
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sctp_ifnp->registered_af);
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if (hold_addr_lock == 0)
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SCTP_IPI_ADDR_WUNLOCK();
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/* Take away the reference, and possibly free it */
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sctp_free_ifn(sctp_ifnp);
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}
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void
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sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
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const char *if_name, uint32_t ifn_index)
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{
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struct sctp_vrf *vrf;
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struct sctp_ifa *sctp_ifap = NULL;
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SCTP_IPI_ADDR_RLOCK();
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vrf = sctp_find_vrf(vrf_id);
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if (vrf == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
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goto out;
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}
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sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
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if (sctp_ifap == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
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goto out;
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}
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if (sctp_ifap->ifn_p == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
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goto out;
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}
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if (if_name) {
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int len1, len2;
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len1 = strlen(if_name);
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len2 = strlen(sctp_ifap->ifn_p->ifn_name);
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if (len1 != len2) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
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len1, len2);
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goto out;
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}
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if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
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sctp_ifap->ifn_p->ifn_name,
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if_name);
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goto out;
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}
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} else {
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if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
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sctp_ifap->ifn_p->ifn_index, ifn_index);
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goto out;
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}
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}
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sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
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sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
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out:
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SCTP_IPI_ADDR_RUNLOCK();
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}
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void
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sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
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const char *if_name, uint32_t ifn_index)
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{
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struct sctp_vrf *vrf;
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struct sctp_ifa *sctp_ifap = NULL;
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SCTP_IPI_ADDR_RLOCK();
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vrf = sctp_find_vrf(vrf_id);
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if (vrf == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
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goto out;
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|
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}
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sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
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if (sctp_ifap == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
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goto out;
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}
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if (sctp_ifap->ifn_p == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
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goto out;
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}
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if (if_name) {
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int len1, len2;
|
|
|
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len1 = strlen(if_name);
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len2 = strlen(sctp_ifap->ifn_p->ifn_name);
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if (len1 != len2) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
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len1, len2);
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goto out;
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}
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if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
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sctp_ifap->ifn_p->ifn_name,
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if_name);
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goto out;
|
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}
|
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} else {
|
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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;
|
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out:
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SCTP_IPI_ADDR_RUNLOCK();
|
|
}
|
|
|
|
/*-
|
|
* Add an ifa to an ifn.
|
|
* Register the interface as necessary.
|
|
* NOTE: ADDR write lock MUST be held.
|
|
*/
|
|
static void
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|
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 */
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|
sctp_ifnp->ifa_count++;
|
|
ifa_af = sctp_ifap->address.sa.sa_family;
|
|
if (ifa_af == AF_INET)
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sctp_ifnp->num_v4++;
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else
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sctp_ifnp->num_v6++;
|
|
if (sctp_ifnp->ifa_count == 1) {
|
|
/* register the new interface */
|
|
SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
|
|
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)
|
|
{
|
|
uint32_t ifn_index;
|
|
|
|
LIST_REMOVE(sctp_ifap, next_ifa);
|
|
if (sctp_ifap->ifn_p) {
|
|
/* update address counts */
|
|
sctp_ifap->ifn_p->ifa_count--;
|
|
if (sctp_ifap->address.sa.sa_family == AF_INET6)
|
|
sctp_ifap->ifn_p->num_v6--;
|
|
else if (sctp_ifap->address.sa.sa_family == AF_INET)
|
|
sctp_ifap->ifn_p->num_v4--;
|
|
|
|
ifn_index = sctp_ifap->ifn_p->ifn_index;
|
|
if (SCTP_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_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
|
|
SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
|
|
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_DEREGISTER_INTERFACE(ifn_index, AF_INET);
|
|
SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
|
|
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 = NULL;
|
|
struct sctp_ifa *sctp_ifap = NULL;
|
|
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_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();
|
|
return (NULL);
|
|
}
|
|
}
|
|
}
|
|
if (sctp_ifnp == NULL) {
|
|
/*
|
|
* build one and add it, can't hold lock until after malloc
|
|
* done though.
|
|
*/
|
|
SCTP_IPI_ADDR_WUNLOCK();
|
|
SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
|
|
sizeof(struct sctp_ifn), SCTP_M_IFN);
|
|
if (sctp_ifnp == NULL) {
|
|
#ifdef INVARIANTS
|
|
panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
|
|
#endif
|
|
return (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, addr->sa_family);
|
|
if (if_name != NULL) {
|
|
memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ);
|
|
} else {
|
|
memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ));
|
|
}
|
|
hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)];
|
|
LIST_INIT(&sctp_ifnp->ifalist);
|
|
SCTP_IPI_ADDR_WLOCK();
|
|
LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
|
|
LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
|
|
atomic_add_int(&sctppcbinfo.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,
|
|
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();
|
|
return (sctp_ifap);
|
|
} else {
|
|
if (sctp_ifap->ifn_p) {
|
|
/*
|
|
* The last IFN gets the address, removee
|
|
* the old one
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
|
|
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",
|
|
sctp_ifnp, sctp_ifap);
|
|
sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
|
|
}
|
|
goto exit_stage_left;
|
|
}
|
|
}
|
|
SCTP_IPI_ADDR_WUNLOCK();
|
|
SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
|
|
if (sctp_ifap == NULL) {
|
|
#ifdef INVARIANTS
|
|
panic("No memory for IFA");
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
|
|
sctp_ifap->ifn_p = sctp_ifnp;
|
|
atomic_add_int(&sctp_ifnp->refcount, 1);
|
|
sctp_ifap->vrf_id = vrf_id;
|
|
sctp_ifap->ifa = ifa;
|
|
memcpy(&sctp_ifap->address, addr, addr->sa_len);
|
|
sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
|
|
sctp_ifap->flags = ifa_flags;
|
|
/* Set scope */
|
|
if (sctp_ifap->address.sa.sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *)&sctp_ifap->address.sin;
|
|
if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
|
|
(IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
|
|
sctp_ifap->src_is_loop = 1;
|
|
}
|
|
if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
|
|
sctp_ifap->src_is_priv = 1;
|
|
}
|
|
sctp_ifnp->num_v4++;
|
|
if (new_ifn_af)
|
|
new_ifn_af = AF_INET;
|
|
} else if (sctp_ifap->address.sa.sa_family == AF_INET6) {
|
|
/* ok to use deprecated addresses? */
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6;
|
|
if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
|
|
(IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
|
|
sctp_ifap->src_is_loop = 1;
|
|
}
|
|
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
|
|
sctp_ifap->src_is_priv = 1;
|
|
}
|
|
sctp_ifnp->num_v6++;
|
|
if (new_ifn_af)
|
|
new_ifn_af = AF_INET6;
|
|
} else {
|
|
new_ifn_af = 0;
|
|
}
|
|
hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
|
|
|
|
if ((sctp_ifap->src_is_priv == 0) &&
|
|
(sctp_ifap->src_is_loop == 0)) {
|
|
sctp_ifap->src_is_glob = 1;
|
|
}
|
|
SCTP_IPI_ADDR_WLOCK();
|
|
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(&sctppcbinfo.ipi_count_ifas, 1);
|
|
if (new_ifn_af) {
|
|
SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
|
|
sctp_ifnp->registered_af = new_ifn_af;
|
|
}
|
|
SCTP_IPI_ADDR_WUNLOCK();
|
|
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(sctppcbinfo.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();
|
|
bzero(wi, sizeof(*wi));
|
|
(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
|
|
wi->ifa = sctp_ifap;
|
|
wi->action = SCTP_ADD_IP_ADDRESS;
|
|
SCTP_IPI_ITERATOR_WQ_LOCK();
|
|
/*
|
|
* Should this really be a tailq? As it is we will process
|
|
* the newest first :-0
|
|
*/
|
|
LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
|
|
SCTP_IPI_ITERATOR_WQ_UNLOCK();
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
|
|
(struct sctp_inpcb *)NULL,
|
|
(struct sctp_tcb *)NULL,
|
|
(struct sctp_nets *)NULL);
|
|
} 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. We do this especially for
|
|
* panda who might recycle indexes fast.
|
|
*/
|
|
if (if_name) {
|
|
int len1, len2;
|
|
|
|
len1 = min(SCTP_IFNAMSIZ, strlen(if_name));
|
|
len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name));
|
|
if (len1 && len2 && (len1 == len2)) {
|
|
/* we can compare them */
|
|
if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 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", sctp_ifap);
|
|
sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
|
|
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(sctppcbinfo.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();
|
|
bzero(wi, sizeof(*wi));
|
|
(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
|
|
wi->ifa = sctp_ifap;
|
|
wi->action = SCTP_DEL_IP_ADDRESS;
|
|
SCTP_IPI_ITERATOR_WQ_LOCK();
|
|
/*
|
|
* Should this really be a tailq? As it is we will process
|
|
* the newest first :-0
|
|
*/
|
|
LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr);
|
|
SCTP_IPI_ITERATOR_WQ_UNLOCK();
|
|
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
|
|
(struct sctp_inpcb *)NULL,
|
|
(struct sctp_tcb *)NULL,
|
|
(struct sctp_nets *)NULL);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
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;
|
|
|
|
if ((to == NULL) || (from == NULL)) {
|
|
return (NULL);
|
|
}
|
|
if (to->sa_family == AF_INET && from->sa_family == AF_INET) {
|
|
lport = ((struct sockaddr_in *)to)->sin_port;
|
|
rport = ((struct sockaddr_in *)from)->sin_port;
|
|
} else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) {
|
|
lport = ((struct sockaddr_in6 *)to)->sin6_port;
|
|
rport = ((struct sockaddr_in6 *)from)->sin6_port;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR(
|
|
(lport + rport), sctppcbinfo.hashtcpmark)];
|
|
/*
|
|
* Ok now for each of the guys in this bucket we must look and see:
|
|
* - Does the remote port match. - Does there single association's
|
|
* addresses match this address (to). If so we update p_ep to point
|
|
* to this ep and return the tcb from it.
|
|
*/
|
|
LIST_FOREACH(inp, ephead, sctp_hash) {
|
|
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 (inp->def_vrf_id != vrf_id) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/* check to see if the ep has one of the addresses */
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
|
|
/* We are NOT bound all, so look further */
|
|
int match = 0;
|
|
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
|
|
if (laddr->ifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__);
|
|
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 */
|
|
struct sockaddr_in *intf_addr, *sin;
|
|
|
|
intf_addr = &laddr->ifa->address.sin;
|
|
sin = (struct sockaddr_in *)to;
|
|
if (from->sa_family == AF_INET) {
|
|
if (sin->sin_addr.s_addr ==
|
|
intf_addr->sin_addr.s_addr) {
|
|
match = 1;
|
|
break;
|
|
}
|
|
} else {
|
|
struct sockaddr_in6 *intf_addr6;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)
|
|
to;
|
|
intf_addr6 = &laddr->ifa->address.sin6;
|
|
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&intf_addr6->sin6_addr)) {
|
|
match = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (match == 0) {
|
|
/* This endpoint does not have this address */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
}
|
|
/*
|
|
* Ok if we hit here the ep has the address, does it hold
|
|
* the tcb?
|
|
*/
|
|
|
|
stcb = LIST_FIRST(&inp->sctp_asoc_list);
|
|
if (stcb == NULL) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
if (stcb->rport != rport) {
|
|
/* remote port does not match. */
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/* Does this TCB have a matching address? */
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
|
|
if (net->ro._l_addr.sa.sa_family != from->sa_family) {
|
|
/* not the same family, can't be a match */
|
|
continue;
|
|
}
|
|
if (from->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin, *rsin;
|
|
|
|
sin = (struct sockaddr_in *)&net->ro._l_addr;
|
|
rsin = (struct sockaddr_in *)from;
|
|
if (sin->sin_addr.s_addr ==
|
|
rsin->sin_addr.s_addr) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
/* Update the endpoint pointer */
|
|
*inp_p = inp;
|
|
SCTP_INP_RUNLOCK(inp);
|
|
return (stcb);
|
|
}
|
|
} else {
|
|
struct sockaddr_in6 *sin6, *rsin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
rsin6 = (struct sockaddr_in6 *)from;
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&rsin6->sin6_addr)) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
/* Update the endpoint pointer */
|
|
*inp_p = inp;
|
|
SCTP_INP_RUNLOCK(inp);
|
|
return (stcb);
|
|
}
|
|
}
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* rules for use
|
|
*
|
|
* 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
|
|
* stcb, both will be locked (locked_tcb and stcb) but decrement will be done
|
|
* (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
|
|
* NULL.
|
|
*/
|
|
|
|
struct sctp_tcb *
|
|
sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
|
|
struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
|
|
{
|
|
struct sctpasochead *head;
|
|
struct sctp_inpcb *inp;
|
|
struct sctp_tcb *stcb = NULL;
|
|
struct sctp_nets *net;
|
|
uint16_t rport;
|
|
|
|
inp = *inp_p;
|
|
if (remote->sa_family == AF_INET) {
|
|
rport = (((struct sockaddr_in *)remote)->sin_port);
|
|
} else if (remote->sa_family == AF_INET6) {
|
|
rport = (((struct sockaddr_in6 *)remote)->sin6_port);
|
|
} else {
|
|
return (NULL);
|
|
}
|
|
if (locked_tcb) {
|
|
/*
|
|
* UN-lock so we can do proper locking here this occurs when
|
|
* called from load_addresses_from_init.
|
|
*/
|
|
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) {
|
|
/*-
|
|
* Now either this guy is our listener or it's the
|
|
* connector. If it is the one that issued the connect, then
|
|
* it's only chance is to be the first TCB in the list. If
|
|
* it is the acceptor, then do the special_lookup to hash
|
|
* and find the real inp.
|
|
*/
|
|
if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
|
|
/* to is peer addr, from is my addr */
|
|
stcb = sctp_tcb_special_locate(inp_p, remote, local,
|
|
netp, 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);
|
|
}
|
|
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;
|
|
}
|
|
/* now look at the list of remote addresses */
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
#ifdef INVARIANTS
|
|
if (net == (TAILQ_NEXT(net, sctp_next))) {
|
|
panic("Corrupt net list");
|
|
}
|
|
#endif
|
|
if (net->ro._l_addr.sa.sa_family !=
|
|
remote->sa_family) {
|
|
/* not the same family */
|
|
continue;
|
|
}
|
|
if (remote->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin, *rsin;
|
|
|
|
sin = (struct sockaddr_in *)
|
|
&net->ro._l_addr;
|
|
rsin = (struct sockaddr_in *)remote;
|
|
if (sin->sin_addr.s_addr ==
|
|
rsin->sin_addr.s_addr) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
if (locked_tcb == NULL) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
} else if (locked_tcb != stcb) {
|
|
SCTP_TCB_LOCK(locked_tcb);
|
|
}
|
|
if (locked_tcb) {
|
|
atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
}
|
|
} else if (remote->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6, *rsin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
rsin6 = (struct sockaddr_in6 *)remote;
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&rsin6->sin6_addr)) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
if (locked_tcb == NULL) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
} else if (locked_tcb != stcb) {
|
|
SCTP_TCB_LOCK(locked_tcb);
|
|
}
|
|
if (locked_tcb) {
|
|
atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
}
|
|
}
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
} else {
|
|
SCTP_INP_WLOCK(inp);
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
goto null_return;
|
|
}
|
|
head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
|
|
inp->sctp_hashmark)];
|
|
if (head == NULL) {
|
|
goto null_return;
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_tcbhash) {
|
|
if (stcb->rport != rport) {
|
|
/* remote port does not match */
|
|
continue;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
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;
|
|
}
|
|
if (remote->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin, *rsin;
|
|
|
|
sin = (struct sockaddr_in *)
|
|
&net->ro._l_addr;
|
|
rsin = (struct sockaddr_in *)remote;
|
|
if (sin->sin_addr.s_addr ==
|
|
rsin->sin_addr.s_addr) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
if (locked_tcb == NULL) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
} else if (locked_tcb != stcb) {
|
|
SCTP_TCB_LOCK(locked_tcb);
|
|
}
|
|
if (locked_tcb) {
|
|
atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
}
|
|
} else if (remote->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6, *rsin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)
|
|
&net->ro._l_addr;
|
|
rsin6 = (struct sockaddr_in6 *)remote;
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&rsin6->sin6_addr)) {
|
|
/* found it */
|
|
if (netp != NULL) {
|
|
*netp = net;
|
|
}
|
|
if (locked_tcb == NULL) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
} else if (locked_tcb != stcb) {
|
|
SCTP_TCB_LOCK(locked_tcb);
|
|
}
|
|
if (locked_tcb) {
|
|
atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
}
|
|
}
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
}
|
|
null_return:
|
|
/* clean up for returning null */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_LOCK(locked_tcb);
|
|
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_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
|
|
{
|
|
/*
|
|
* Use my the assoc_id to find a endpoint
|
|
*/
|
|
struct sctpasochead *head;
|
|
struct sctp_tcb *stcb;
|
|
uint32_t id;
|
|
|
|
if (asoc_id == 0 || inp == NULL) {
|
|
return (NULL);
|
|
}
|
|
SCTP_INP_INFO_RLOCK();
|
|
id = (uint32_t) asoc_id;
|
|
head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id,
|
|
sctppcbinfo.hashasocmark)];
|
|
if (head == NULL) {
|
|
/* invalid id TSNH */
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (NULL);
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_asocs) {
|
|
SCTP_INP_RLOCK(stcb->sctp_ep);
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (NULL);
|
|
}
|
|
if (stcb->asoc.assoc_id == id) {
|
|
/* candidate */
|
|
if (inp != stcb->sctp_ep) {
|
|
/*
|
|
* some other guy has the same id active (id
|
|
* collision ??).
|
|
*/
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
continue;
|
|
}
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
continue;
|
|
}
|
|
if (want_lock) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
}
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
}
|
|
/* Ok if we missed here, lets try the restart hash */
|
|
head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)];
|
|
if (head == NULL) {
|
|
/* invalid id TSNH */
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (NULL);
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
|
|
SCTP_INP_RLOCK(stcb->sctp_ep);
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
continue;
|
|
}
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
continue;
|
|
}
|
|
if (want_lock) {
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
if (stcb->asoc.assoc_id == id) {
|
|
/* candidate */
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
if (inp != stcb->sctp_ep) {
|
|
/*
|
|
* some other guy has the same id active (id
|
|
* collision ??).
|
|
*/
|
|
if (want_lock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
continue;
|
|
}
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (stcb);
|
|
} else {
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
}
|
|
if (want_lock) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
}
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static struct sctp_inpcb *
|
|
sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
|
|
uint16_t lport, uint32_t vrf_id)
|
|
{
|
|
struct sctp_inpcb *inp;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
struct sctp_laddr *laddr;
|
|
int fnd;
|
|
|
|
/*
|
|
* Endpoing probe expects that the INP_INFO is locked.
|
|
*/
|
|
if (nam->sa_family == AF_INET) {
|
|
sin = (struct sockaddr_in *)nam;
|
|
sin6 = NULL;
|
|
} else if (nam->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)nam;
|
|
sin = NULL;
|
|
} else {
|
|
/* unsupported family */
|
|
return (NULL);
|
|
}
|
|
if (head == NULL)
|
|
return (NULL);
|
|
LIST_FOREACH(inp, head, sctp_hash) {
|
|
SCTP_INP_RLOCK(inp);
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
|
|
(inp->sctp_lport == lport)) {
|
|
/* got it */
|
|
if ((nam->sa_family == AF_INET) &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
|
|
SCTP_IPV6_V6ONLY(inp)) {
|
|
/* IPv4 on a IPv6 socket with ONLY IPv6 set */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/* A V6 address and the endpoint is NOT bound V6 */
|
|
if (nam->sa_family == AF_INET6 &&
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/* does a VRF id match? */
|
|
fnd = 0;
|
|
if (inp->def_vrf_id == vrf_id)
|
|
fnd = 1;
|
|
|
|
SCTP_INP_RUNLOCK(inp);
|
|
if (!fnd)
|
|
continue;
|
|
return (inp);
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
|
|
if ((nam->sa_family == AF_INET) &&
|
|
(sin->sin_addr.s_addr == INADDR_ANY)) {
|
|
/* Can't hunt for one that has no address specified */
|
|
return (NULL);
|
|
} else if ((nam->sa_family == AF_INET6) &&
|
|
(IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
|
|
/* Can't hunt for one that has no address specified */
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* ok, not bound to all so see if we can find a EP bound to this
|
|
* address.
|
|
*/
|
|
LIST_FOREACH(inp, head, sctp_hash) {
|
|
SCTP_INP_RLOCK(inp);
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/*
|
|
* Ok this could be a likely candidate, look at all of its
|
|
* addresses
|
|
*/
|
|
if (inp->sctp_lport != lport) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
/* does a VRF id match? */
|
|
fnd = 0;
|
|
if (inp->def_vrf_id == vrf_id)
|
|
fnd = 1;
|
|
|
|
if (!fnd) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
continue;
|
|
}
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
|
|
__FUNCTION__);
|
|
continue;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
|
|
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 */
|
|
struct sockaddr_in *intf_addr;
|
|
|
|
intf_addr = &laddr->ifa->address.sin;
|
|
if (nam->sa_family == AF_INET) {
|
|
if (sin->sin_addr.s_addr ==
|
|
intf_addr->sin_addr.s_addr) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
return (inp);
|
|
}
|
|
} else if (nam->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *intf_addr6;
|
|
|
|
intf_addr6 = &laddr->ifa->address.sin6;
|
|
if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr,
|
|
&intf_addr6->sin6_addr)) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
return (inp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
struct sctp_inpcb *
|
|
sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
|
|
uint32_t vrf_id)
|
|
{
|
|
/*
|
|
* First we check the hash table to see if someone has this port
|
|
* bound with just the port.
|
|
*/
|
|
struct sctp_inpcb *inp;
|
|
struct sctppcbhead *head;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
int lport;
|
|
|
|
if (nam->sa_family == AF_INET) {
|
|
sin = (struct sockaddr_in *)nam;
|
|
lport = ((struct sockaddr_in *)nam)->sin_port;
|
|
} else if (nam->sa_family == AF_INET6) {
|
|
sin6 = (struct sockaddr_in6 *)nam;
|
|
lport = ((struct sockaddr_in6 *)nam)->sin6_port;
|
|
} else {
|
|
/* unsupported family */
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* I could cheat here and just cast to one of the types but we will
|
|
* do it right. It also provides the check against an Unsupported
|
|
* type too.
|
|
*/
|
|
/* Find the head of the ALLADDR chain */
|
|
if (have_lock == 0) {
|
|
SCTP_INP_INFO_RLOCK();
|
|
}
|
|
head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
|
|
sctppcbinfo.hashmark)];
|
|
inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
|
|
|
|
/*
|
|
* If the TCP model exists it could be that the main listening
|
|
* endpoint is gone but there exists a connected socket for this guy
|
|
* yet. If so we can return the first one that we find. This may NOT
|
|
* be the correct one but the sctp_findassociation_ep_addr has
|
|
* further code to look at all TCP models.
|
|
*/
|
|
if (inp == NULL && find_tcp_pool) {
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sctppcbinfo.hashtblsize; i++) {
|
|
/*
|
|
* This is real gross, but we do NOT have a remote
|
|
* port at this point depending on who is calling.
|
|
* We must therefore look for ANY one that matches
|
|
* our local port :/
|
|
*/
|
|
head = &sctppcbinfo.sctp_tcpephash[i];
|
|
if (LIST_FIRST(head)) {
|
|
inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
|
|
if (inp) {
|
|
/* Found one */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (inp) {
|
|
SCTP_INP_INCR_REF(inp);
|
|
}
|
|
if (have_lock == 0) {
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
}
|
|
return (inp);
|
|
}
|
|
|
|
/*
|
|
* Find an association for an endpoint with the pointer to whom you want to
|
|
* send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
|
|
* need to change the *to to some other struct like a mbuf...
|
|
*/
|
|
struct sctp_tcb *
|
|
sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from,
|
|
struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
|
|
uint32_t vrf_id)
|
|
{
|
|
struct sctp_inpcb *inp = NULL;
|
|
struct sctp_tcb *retval;
|
|
|
|
SCTP_INP_INFO_RLOCK();
|
|
if (find_tcp_pool) {
|
|
if (inp_p != NULL) {
|
|
retval = sctp_tcb_special_locate(inp_p, from, to, netp,
|
|
vrf_id);
|
|
} else {
|
|
retval = sctp_tcb_special_locate(&inp, from, to, netp,
|
|
vrf_id);
|
|
}
|
|
if (retval != NULL) {
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (retval);
|
|
}
|
|
}
|
|
inp = sctp_pcb_findep(to, 0, 1, vrf_id);
|
|
if (inp_p != NULL) {
|
|
*inp_p = inp;
|
|
}
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
|
|
if (inp == NULL) {
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* ok, we have an endpoint, now lets find the assoc for it (if any)
|
|
* we now place the source address or from in the to of the find
|
|
* endpoint call. Since in reality this chain is used from the
|
|
* inbound packet side.
|
|
*/
|
|
if (inp_p != NULL) {
|
|
retval = sctp_findassociation_ep_addr(inp_p, from, netp, to,
|
|
NULL);
|
|
} else {
|
|
retval = sctp_findassociation_ep_addr(&inp, from, netp, to,
|
|
NULL);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
|
|
/*
|
|
* This routine will grub through the mbuf that is a INIT or INIT-ACK and
|
|
* find all addresses that the sender has specified in any address list. Each
|
|
* address will be used to lookup the TCB and see if one exits.
|
|
*/
|
|
static struct sctp_tcb *
|
|
sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset,
|
|
struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
|
|
struct sockaddr *dest)
|
|
{
|
|
struct sockaddr_in sin4;
|
|
struct sockaddr_in6 sin6;
|
|
struct sctp_paramhdr *phdr, parm_buf;
|
|
struct sctp_tcb *retval;
|
|
uint32_t ptype, plen;
|
|
|
|
memset(&sin4, 0, sizeof(sin4));
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin4.sin_len = sizeof(sin4);
|
|
sin4.sin_family = AF_INET;
|
|
sin4.sin_port = sh->src_port;
|
|
sin6.sin6_len = sizeof(sin6);
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_port = sh->src_port;
|
|
|
|
retval = NULL;
|
|
offset += sizeof(struct sctp_init_chunk);
|
|
|
|
phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
|
|
while (phdr != NULL) {
|
|
/* now we must see if we want the parameter */
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
if (plen == 0) {
|
|
break;
|
|
}
|
|
if (ptype == SCTP_IPV4_ADDRESS &&
|
|
plen == sizeof(struct sctp_ipv4addr_param)) {
|
|
/* Get the rest of the address */
|
|
struct sctp_ipv4addr_param ip4_parm, *p4;
|
|
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
|
|
if (phdr == NULL) {
|
|
return (NULL);
|
|
}
|
|
p4 = (struct sctp_ipv4addr_param *)phdr;
|
|
memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
|
|
/* look it up */
|
|
retval = sctp_findassociation_ep_addr(inp_p,
|
|
(struct sockaddr *)&sin4, netp, dest, NULL);
|
|
if (retval != NULL) {
|
|
return (retval);
|
|
}
|
|
} else if (ptype == SCTP_IPV6_ADDRESS &&
|
|
plen == sizeof(struct sctp_ipv6addr_param)) {
|
|
/* Get the rest of the address */
|
|
struct sctp_ipv6addr_param ip6_parm, *p6;
|
|
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
|
|
if (phdr == NULL) {
|
|
return (NULL);
|
|
}
|
|
p6 = (struct sctp_ipv6addr_param *)phdr;
|
|
memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
|
|
/* look it up */
|
|
retval = sctp_findassociation_ep_addr(inp_p,
|
|
(struct sockaddr *)&sin6, netp, dest, NULL);
|
|
if (retval != NULL) {
|
|
return (retval);
|
|
}
|
|
}
|
|
offset += SCTP_SIZE32(plen);
|
|
phdr = sctp_get_next_param(m, offset, &parm_buf,
|
|
sizeof(parm_buf));
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
static struct sctp_tcb *
|
|
sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag,
|
|
struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
|
|
uint16_t lport, int skip_src_check)
|
|
{
|
|
/*
|
|
* Use my vtag to hash. If we find it we then verify the source addr
|
|
* is in the assoc. If all goes well we save a bit on rec of a
|
|
* packet.
|
|
*/
|
|
struct sctpasochead *head;
|
|
struct sctp_nets *net;
|
|
struct sctp_tcb *stcb;
|
|
|
|
*netp = NULL;
|
|
*inp_p = NULL;
|
|
SCTP_INP_INFO_RLOCK();
|
|
head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag,
|
|
sctppcbinfo.hashasocmark)];
|
|
if (head == NULL) {
|
|
/* invalid vtag */
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
return (NULL);
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_asocs) {
|
|
SCTP_INP_RLOCK(stcb->sctp_ep);
|
|
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
continue;
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
SCTP_INP_RUNLOCK(stcb->sctp_ep);
|
|
if (stcb->asoc.my_vtag == vtag) {
|
|
/* candidate */
|
|
if (stcb->rport != rport) {
|
|
/*
|
|
* we could remove this if vtags are unique
|
|
* across the system.
|
|
*/
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
continue;
|
|
}
|
|
if (stcb->sctp_ep->sctp_lport != lport) {
|
|
/*
|
|
* we could remove this if vtags are unique
|
|
* across the system.
|
|
*/
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
continue;
|
|
}
|
|
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
continue;
|
|
}
|
|
if (skip_src_check) {
|
|
*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 iphlen, int offset,
|
|
struct sctphdr *sh, struct sctp_chunkhdr *ch,
|
|
struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
|
|
{
|
|
int find_tcp_pool;
|
|
struct ip *iph;
|
|
struct sctp_tcb *retval;
|
|
struct sockaddr_storage to_store, from_store;
|
|
struct sockaddr *to = (struct sockaddr *)&to_store;
|
|
struct sockaddr *from = (struct sockaddr *)&from_store;
|
|
struct sctp_inpcb *inp;
|
|
|
|
iph = mtod(m, struct ip *);
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* its IPv4 */
|
|
struct sockaddr_in *from4;
|
|
|
|
from4 = (struct sockaddr_in *)&from_store;
|
|
bzero(from4, sizeof(*from4));
|
|
from4->sin_family = AF_INET;
|
|
from4->sin_len = sizeof(struct sockaddr_in);
|
|
from4->sin_addr.s_addr = iph->ip_src.s_addr;
|
|
from4->sin_port = sh->src_port;
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
/* its IPv6 */
|
|
struct ip6_hdr *ip6;
|
|
struct sockaddr_in6 *from6;
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
from6 = (struct sockaddr_in6 *)&from_store;
|
|
bzero(from6, sizeof(*from6));
|
|
from6->sin6_family = AF_INET6;
|
|
from6->sin6_len = sizeof(struct sockaddr_in6);
|
|
from6->sin6_addr = ip6->ip6_src;
|
|
from6->sin6_port = sh->src_port;
|
|
/* Get the scopes in properly to the sin6 addr's */
|
|
/* we probably don't need these operations */
|
|
(void)sa6_recoverscope(from6);
|
|
sa6_embedscope(from6, ip6_use_defzone);
|
|
} else {
|
|
/* Currently not supported. */
|
|
return (NULL);
|
|
}
|
|
if (sh->v_tag) {
|
|
/* we only go down this path if vtag is non-zero */
|
|
retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag),
|
|
inp_p, netp, sh->src_port, sh->dest_port, 0);
|
|
if (retval) {
|
|
return (retval);
|
|
}
|
|
}
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* its IPv4 */
|
|
struct sockaddr_in *to4;
|
|
|
|
to4 = (struct sockaddr_in *)&to_store;
|
|
bzero(to4, sizeof(*to4));
|
|
to4->sin_family = AF_INET;
|
|
to4->sin_len = sizeof(struct sockaddr_in);
|
|
to4->sin_addr.s_addr = iph->ip_dst.s_addr;
|
|
to4->sin_port = sh->dest_port;
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
/* its IPv6 */
|
|
struct ip6_hdr *ip6;
|
|
struct sockaddr_in6 *to6;
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
to6 = (struct sockaddr_in6 *)&to_store;
|
|
bzero(to6, sizeof(*to6));
|
|
to6->sin6_family = AF_INET6;
|
|
to6->sin6_len = sizeof(struct sockaddr_in6);
|
|
to6->sin6_addr = ip6->ip6_dst;
|
|
to6->sin6_port = sh->dest_port;
|
|
/* Get the scopes in properly to the sin6 addr's */
|
|
/* we probably don't need these operations */
|
|
(void)sa6_recoverscope(to6);
|
|
sa6_embedscope(to6, ip6_use_defzone);
|
|
}
|
|
find_tcp_pool = 0;
|
|
if ((ch->chunk_type != SCTP_INITIATION) &&
|
|
(ch->chunk_type != SCTP_INITIATION_ACK) &&
|
|
(ch->chunk_type != SCTP_COOKIE_ACK) &&
|
|
(ch->chunk_type != SCTP_COOKIE_ECHO)) {
|
|
/* Other chunk types go to the tcp pool. */
|
|
find_tcp_pool = 1;
|
|
}
|
|
if (inp_p) {
|
|
retval = sctp_findassociation_addr_sa(to, from, inp_p, netp,
|
|
find_tcp_pool, vrf_id);
|
|
inp = *inp_p;
|
|
} else {
|
|
retval = sctp_findassociation_addr_sa(to, from, &inp, netp,
|
|
find_tcp_pool, vrf_id);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp);
|
|
if (retval == NULL && inp) {
|
|
/* Found a EP but not this address */
|
|
if ((ch->chunk_type == SCTP_INITIATION) ||
|
|
(ch->chunk_type == SCTP_INITIATION_ACK)) {
|
|
/*-
|
|
* special hook, we do NOT return linp or an
|
|
* association that is linked to an existing
|
|
* association that is under the TCP pool (i.e. no
|
|
* listener exists). The endpoint finding routine
|
|
* will always find a listner before examining the
|
|
* TCP pool.
|
|
*/
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
|
|
if (inp_p) {
|
|
*inp_p = NULL;
|
|
}
|
|
return (NULL);
|
|
}
|
|
retval = sctp_findassociation_special_addr(m, iphlen,
|
|
offset, sh, &inp, netp, to);
|
|
if (inp_p != NULL) {
|
|
*inp_p = inp;
|
|
}
|
|
}
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval);
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* lookup an association by an ASCONF lookup address.
|
|
* if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
|
|
*/
|
|
struct sctp_tcb *
|
|
sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset,
|
|
struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp)
|
|
{
|
|
struct sctp_tcb *stcb;
|
|
struct sockaddr_in *sin;
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_storage local_store, remote_store;
|
|
struct ip *iph;
|
|
struct sctp_paramhdr parm_buf, *phdr;
|
|
int ptype;
|
|
int zero_address = 0;
|
|
|
|
|
|
memset(&local_store, 0, sizeof(local_store));
|
|
memset(&remote_store, 0, sizeof(remote_store));
|
|
|
|
/* First get the destination address setup too. */
|
|
iph = mtod(m, struct ip *);
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* its IPv4 */
|
|
sin = (struct sockaddr_in *)&local_store;
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(*sin);
|
|
sin->sin_port = sh->dest_port;
|
|
sin->sin_addr.s_addr = iph->ip_dst.s_addr;
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
/* its IPv6 */
|
|
struct ip6_hdr *ip6;
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
sin6 = (struct sockaddr_in6 *)&local_store;
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(*sin6);
|
|
sin6->sin6_port = sh->dest_port;
|
|
sin6->sin6_addr = ip6->ip6_dst;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
|
|
phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
|
|
&parm_buf, sizeof(struct sctp_paramhdr));
|
|
if (phdr == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
|
|
__FUNCTION__);
|
|
return NULL;
|
|
}
|
|
ptype = (int)((uint32_t) ntohs(phdr->param_type));
|
|
/* get the correlation address */
|
|
if (ptype == SCTP_IPV6_ADDRESS) {
|
|
/* ipv6 address param */
|
|
struct sctp_ipv6addr_param *p6, p6_buf;
|
|
|
|
if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
|
|
return NULL;
|
|
}
|
|
p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
|
|
offset + sizeof(struct sctp_asconf_chunk),
|
|
&p6_buf.ph, sizeof(*p6));
|
|
if (p6 == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
|
|
__FUNCTION__);
|
|
return (NULL);
|
|
}
|
|
sin6 = (struct sockaddr_in6 *)&remote_store;
|
|
sin6->sin6_family = AF_INET6;
|
|
sin6->sin6_len = sizeof(*sin6);
|
|
sin6->sin6_port = sh->src_port;
|
|
memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
|
|
zero_address = 1;
|
|
} else if (ptype == SCTP_IPV4_ADDRESS) {
|
|
/* ipv4 address param */
|
|
struct sctp_ipv4addr_param *p4, p4_buf;
|
|
|
|
if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
|
|
return NULL;
|
|
}
|
|
p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
|
|
offset + sizeof(struct sctp_asconf_chunk),
|
|
&p4_buf.ph, sizeof(*p4));
|
|
if (p4 == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
|
|
__FUNCTION__);
|
|
return (NULL);
|
|
}
|
|
sin = (struct sockaddr_in *)&remote_store;
|
|
sin->sin_family = AF_INET;
|
|
sin->sin_len = sizeof(*sin);
|
|
sin->sin_port = sh->src_port;
|
|
memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
|
|
if (sin->sin_addr.s_addr == INADDR_ANY)
|
|
zero_address = 1;
|
|
} else {
|
|
/* invalid address param type */
|
|
return NULL;
|
|
}
|
|
|
|
if (zero_address) {
|
|
stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p,
|
|
netp, sh->src_port, sh->dest_port, 1);
|
|
/*
|
|
* printf("findassociation_ep_asconf: zero lookup address
|
|
* finds stcb 0x%x\n", (uint32_t)stcb);
|
|
*/
|
|
} else {
|
|
stcb = sctp_findassociation_ep_addr(inp_p,
|
|
(struct sockaddr *)&remote_store, netp,
|
|
(struct sockaddr *)&local_store, NULL);
|
|
}
|
|
return (stcb);
|
|
}
|
|
|
|
|
|
/*
|
|
* allocate a sctp_inpcb and setup a temporary binding to a port/all
|
|
* addresses. This way if we don't get a bind we by default pick a ephemeral
|
|
* port with all addresses bound.
|
|
*/
|
|
int
|
|
sctp_inpcb_alloc(struct socket *so, 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(sctppcbinfo.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 */
|
|
bzero(inp, sizeof(*inp));
|
|
|
|
/* bump generations */
|
|
/* setup socket pointers */
|
|
inp->sctp_socket = so;
|
|
inp->ip_inp.inp.inp_socket = so;
|
|
|
|
inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
|
|
inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
|
|
|
|
#ifdef IPSEC
|
|
{
|
|
struct inpcbpolicy *pcb_sp = NULL;
|
|
|
|
error = ipsec_init_policy(so, &pcb_sp);
|
|
/* Arrange to share the policy */
|
|
inp->ip_inp.inp.inp_sp = pcb_sp;
|
|
((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
|
|
}
|
|
if (error != 0) {
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return error;
|
|
}
|
|
#endif /* IPSEC */
|
|
SCTP_INCR_EP_COUNT();
|
|
inp->ip_inp.inp.inp_ip_ttl = ip_defttl;
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
|
|
so->so_pcb = (caddr_t)inp;
|
|
|
|
if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) ||
|
|
(SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) {
|
|
/* UDP style socket */
|
|
inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
|
|
SCTP_PCB_FLAGS_UNBOUND);
|
|
/* 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 */
|
|
SCTP_CLEAR_SO_NBIO(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);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
if (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_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_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_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);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
|
|
return (ENOBUFS);
|
|
}
|
|
inp->def_vrf_id = vrf_id;
|
|
|
|
SCTP_INP_INFO_WLOCK();
|
|
SCTP_INP_LOCK_INIT(inp);
|
|
INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
|
|
SCTP_INP_READ_INIT(inp);
|
|
SCTP_ASOC_CREATE_LOCK_INIT(inp);
|
|
/* lock the new ep */
|
|
SCTP_INP_WLOCK(inp);
|
|
|
|
/* add it to the info area */
|
|
LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
|
|
TAILQ_INIT(&inp->read_queue);
|
|
LIST_INIT(&inp->sctp_addr_list);
|
|
|
|
LIST_INIT(&inp->sctp_asoc_list);
|
|
|
|
#ifdef SCTP_TRACK_FREED_ASOCS
|
|
/* TEMP CODE */
|
|
LIST_INIT(&inp->sctp_asoc_free_list);
|
|
#endif
|
|
/* Init the timer structure for signature change */
|
|
SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
|
|
inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
|
|
|
|
/* now init the actual endpoint default data */
|
|
m = &inp->sctp_ep;
|
|
|
|
/* setup the base timeout information */
|
|
m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */
|
|
m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */
|
|
m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default);
|
|
m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default);
|
|
m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default);
|
|
m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default);
|
|
m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default);
|
|
/* all max/min max are in ms */
|
|
m->sctp_maxrto = sctp_rto_max_default;
|
|
m->sctp_minrto = sctp_rto_min_default;
|
|
m->initial_rto = sctp_rto_initial_default;
|
|
m->initial_init_rto_max = sctp_init_rto_max_default;
|
|
m->sctp_sack_freq = sctp_sack_freq_default;
|
|
|
|
m->max_open_streams_intome = MAX_SCTP_STREAMS;
|
|
|
|
m->max_init_times = sctp_init_rtx_max_default;
|
|
m->max_send_times = sctp_assoc_rtx_max_default;
|
|
m->def_net_failure = sctp_path_rtx_max_default;
|
|
m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
|
|
m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
|
|
m->max_burst = sctp_max_burst_default;
|
|
if ((sctp_default_cc_module >= SCTP_CC_RFC2581) &&
|
|
(sctp_default_cc_module <= SCTP_CC_HTCP)) {
|
|
m->sctp_default_cc_module = sctp_default_cc_module;
|
|
} else {
|
|
/* sysctl done with invalid value, set to 2581 */
|
|
m->sctp_default_cc_module = SCTP_CC_RFC2581;
|
|
}
|
|
/* number of streams to pre-open on a association */
|
|
m->pre_open_stream_count = sctp_nr_outgoing_streams_default;
|
|
|
|
/* Add adaptation cookie */
|
|
m->adaptation_layer_indicator = 0x504C5253;
|
|
|
|
/* seed random number generator */
|
|
m->random_counter = 1;
|
|
m->store_at = SCTP_SIGNATURE_SIZE;
|
|
SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
|
|
sctp_fill_random_store(m);
|
|
|
|
/* Minimum cookie size */
|
|
m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
|
|
sizeof(struct sctp_state_cookie);
|
|
m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
|
|
|
|
/* Setup the initial secret */
|
|
(void)SCTP_GETTIME_TIMEVAL(&time);
|
|
m->time_of_secret_change = time.tv_sec;
|
|
|
|
for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
|
|
m->secret_key[0][i] = sctp_select_initial_TSN(m);
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
|
|
|
|
/* How long is a cookie good for ? */
|
|
m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default);
|
|
/*
|
|
* Initialize authentication parameters
|
|
*/
|
|
m->local_hmacs = sctp_default_supported_hmaclist();
|
|
m->local_auth_chunks = sctp_alloc_chunklist();
|
|
sctp_auth_set_default_chunks(m->local_auth_chunks);
|
|
LIST_INIT(&m->shared_keys);
|
|
/* add default NULL key as key id 0 */
|
|
null_key = sctp_alloc_sharedkey();
|
|
sctp_insert_sharedkey(&m->shared_keys, null_key);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 12);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
|
|
struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_nets *net;
|
|
uint16_t lport, rport;
|
|
struct sctppcbhead *head;
|
|
struct sctp_laddr *laddr, *oladdr;
|
|
|
|
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);
|
|
|
|
new_inp->sctp_ep.time_of_secret_change =
|
|
old_inp->sctp_ep.time_of_secret_change;
|
|
memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
|
|
sizeof(old_inp->sctp_ep.secret_key));
|
|
new_inp->sctp_ep.current_secret_number =
|
|
old_inp->sctp_ep.current_secret_number;
|
|
new_inp->sctp_ep.last_secret_number =
|
|
old_inp->sctp_ep.last_secret_number;
|
|
new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
|
|
|
|
/* make it so new data pours into the new socket */
|
|
stcb->sctp_socket = new_inp->sctp_socket;
|
|
stcb->sctp_ep = new_inp;
|
|
|
|
/* Copy the port across */
|
|
lport = new_inp->sctp_lport = old_inp->sctp_lport;
|
|
rport = stcb->rport;
|
|
/* Pull the tcb from the old association */
|
|
LIST_REMOVE(stcb, sctp_tcbhash);
|
|
LIST_REMOVE(stcb, sctp_tcblist);
|
|
|
|
/* Now insert the new_inp into the TCP connected hash */
|
|
head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport),
|
|
sctppcbinfo.hashtcpmark)];
|
|
|
|
LIST_INSERT_HEAD(head, new_inp, sctp_hash);
|
|
/* Its safe to access */
|
|
new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
|
|
|
|
/* Now move the tcb into the endpoint list */
|
|
LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
|
|
/*
|
|
* Question, do we even need to worry about the ep-hash since we
|
|
* only have one connection? Probably not :> so lets get rid of it
|
|
* and not suck up any kernel memory in that.
|
|
*/
|
|
|
|
/* Ok. Let's restart timer. */
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
|
|
stcb, net);
|
|
}
|
|
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
if (new_inp->sctp_tcbhash != NULL) {
|
|
SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
|
|
new_inp->sctp_tcbhash = NULL;
|
|
}
|
|
if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
|
|
/* Subset bound, so copy in the laddr list from the old_inp */
|
|
LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
|
|
laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
|
|
if (laddr == NULL) {
|
|
/*
|
|
* Gak, what can we do? This assoc is really
|
|
* HOSED. We probably should send an abort
|
|
* here.
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
|
|
continue;
|
|
}
|
|
SCTP_INCR_LADDR_COUNT();
|
|
bzero(laddr, 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++;
|
|
}
|
|
}
|
|
/*
|
|
* Now any running timers need to be adjusted since we really don't
|
|
* care if they are running or not just blast in the new_inp into
|
|
* all of them.
|
|
*/
|
|
|
|
stcb->asoc.hb_timer.ep = (void *)new_inp;
|
|
stcb->asoc.dack_timer.ep = (void *)new_inp;
|
|
stcb->asoc.asconf_timer.ep = (void *)new_inp;
|
|
stcb->asoc.strreset_timer.ep = (void *)new_inp;
|
|
stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
|
|
stcb->asoc.autoclose_timer.ep = (void *)new_inp;
|
|
stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
|
|
stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
|
|
/* now what about the nets? */
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
net->pmtu_timer.ep = (void *)new_inp;
|
|
net->rxt_timer.ep = (void *)new_inp;
|
|
net->fr_timer.ep = (void *)new_inp;
|
|
}
|
|
SCTP_INP_WUNLOCK(new_inp);
|
|
SCTP_INP_WUNLOCK(old_inp);
|
|
}
|
|
|
|
static int
|
|
sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
|
|
{
|
|
struct sctppcbhead *head;
|
|
struct sctp_inpcb *t_inp;
|
|
int fnd;
|
|
|
|
head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
|
|
sctppcbinfo.hashmark)];
|
|
LIST_FOREACH(t_inp, head, sctp_hash) {
|
|
if (t_inp->sctp_lport != lport) {
|
|
continue;
|
|
}
|
|
/* is it in the VRF in question */
|
|
fnd = 0;
|
|
if (t_inp->def_vrf_id == vrf_id)
|
|
fnd = 1;
|
|
if (!fnd)
|
|
continue;
|
|
|
|
/* This one is in use. */
|
|
/* check the v6/v4 binding issue */
|
|
if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
|
|
SCTP_IPV6_V6ONLY(t_inp)) {
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
/* collision in V6 space */
|
|
return (1);
|
|
} else {
|
|
/* inp is BOUND_V4 no conflict */
|
|
continue;
|
|
}
|
|
} else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
|
|
/* t_inp is bound v4 and v6, conflict always */
|
|
return (1);
|
|
} else {
|
|
/* t_inp is bound only V4 */
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
|
|
SCTP_IPV6_V6ONLY(inp)) {
|
|
/* no conflict */
|
|
continue;
|
|
}
|
|
/* else fall through to conflict */
|
|
}
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
|
|
/* sctp_ifap is used to bypass normal local address validation checks */
|
|
int
|
|
sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
|
|
struct sctp_ifa *sctp_ifap, struct thread *p)
|
|
{
|
|
/* bind a ep to a socket address */
|
|
struct sctppcbhead *head;
|
|
struct sctp_inpcb *inp, *inp_tmp;
|
|
struct inpcb *ip_inp;
|
|
int bindall;
|
|
int prison = 0;
|
|
uint16_t lport;
|
|
int error;
|
|
uint32_t vrf_id;
|
|
|
|
lport = 0;
|
|
error = 0;
|
|
bindall = 1;
|
|
inp = (struct sctp_inpcb *)so->so_pcb;
|
|
ip_inp = (struct inpcb *)so->so_pcb;
|
|
#ifdef SCTP_DEBUG
|
|
if (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) {
|
|
/* already did a bind, subsequent binds NOT allowed ! */
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
#ifdef INVARIANTS
|
|
if (p == NULL)
|
|
panic("null proc/thread");
|
|
#endif
|
|
if (p && jailed(p->td_ucred)) {
|
|
prison = 1;
|
|
}
|
|
if (addr != NULL) {
|
|
if (addr->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
/* IPV6_V6ONLY socket? */
|
|
if (SCTP_IPV6_V6ONLY(ip_inp)) {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
if (addr->sa_len != sizeof(*sin)) {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
sin = (struct sockaddr_in *)addr;
|
|
lport = sin->sin_port;
|
|
if (prison) {
|
|
/*
|
|
* For INADDR_ANY and LOOPBACK the
|
|
* prison_ip() call will transmute the ip
|
|
* address to the proper value (i.e. the IP
|
|
* address owned by the jail).
|
|
*/
|
|
if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
if (sin->sin_addr.s_addr != INADDR_ANY) {
|
|
bindall = 0;
|
|
}
|
|
} else if (addr->sa_family == AF_INET6) {
|
|
/* Only for pure IPv6 Address. (No IPv4 Mapped!) */
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)addr;
|
|
|
|
if (addr->sa_len != sizeof(*sin6)) {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
lport = sin6->sin6_port;
|
|
/*
|
|
* Jail checks for IPv6 should go HERE! i.e. add the
|
|
* prison_ip() equivilant in this postion to
|
|
* transmute the addresses to the proper one jailed.
|
|
*/
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
bindall = 0;
|
|
/* KAME hack: embed scopeid */
|
|
if (sa6_embedscope(sin6, ip6_use_defzone) != 0) {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
/* this must be cleared for ifa_ifwithaddr() */
|
|
sin6->sin6_scope_id = 0;
|
|
} else {
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
}
|
|
SCTP_INP_INFO_WLOCK();
|
|
SCTP_INP_WLOCK(inp);
|
|
/* Setup a vrf_id to be the default for the non-bind-all case. */
|
|
vrf_id = inp->def_vrf_id;
|
|
|
|
/* increase our count due to the unlock we do */
|
|
SCTP_INP_INCR_REF(inp);
|
|
if (lport) {
|
|
/*
|
|
* Did the caller specify a port? if so we must see if a ep
|
|
* already has this one bound.
|
|
*/
|
|
/* got to be root to get at low ports */
|
|
if (ntohs(lport) < IPPORT_RESERVED) {
|
|
if (p && (error =
|
|
priv_check(p, PRIV_NETINET_RESERVEDPORT)
|
|
)) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (error);
|
|
}
|
|
}
|
|
if (p == NULL) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
|
|
return (error);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
if (bindall) {
|
|
vrf_id = inp->def_vrf_id;
|
|
inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
|
|
if (inp_tmp != NULL) {
|
|
/*
|
|
* lock guy returned and lower count note
|
|
* that we are not bound so inp_tmp should
|
|
* NEVER be inp. And it is this inp
|
|
* (inp_tmp) that gets the reference bump,
|
|
* so we must lower it.
|
|
*/
|
|
SCTP_INP_DECR_REF(inp_tmp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
/* unlock info */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
|
|
return (EADDRINUSE);
|
|
}
|
|
} else {
|
|
inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
|
|
if (inp_tmp != NULL) {
|
|
/*
|
|
* lock guy returned and lower count note
|
|
* that we are not bound so inp_tmp should
|
|
* NEVER be inp. And it is this inp
|
|
* (inp_tmp) that gets the reference bump,
|
|
* so we must lower it.
|
|
*/
|
|
SCTP_INP_DECR_REF(inp_tmp);
|
|
SCTP_INP_DECR_REF(inp);
|
|
/* unlock info */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
|
|
return (EADDRINUSE);
|
|
}
|
|
}
|
|
SCTP_INP_WLOCK(inp);
|
|
if (bindall) {
|
|
/* verify that no lport is not used by a singleton */
|
|
if (sctp_isport_inuse(inp, lport, vrf_id)) {
|
|
/* Sorry someone already has this one bound */
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
|
|
return (EADDRINUSE);
|
|
}
|
|
}
|
|
} else {
|
|
uint16_t first, last, candidate;
|
|
uint16_t count;
|
|
int done;
|
|
|
|
if (ip_inp->inp_flags & INP_HIGHPORT) {
|
|
first = ipport_hifirstauto;
|
|
last = ipport_hilastauto;
|
|
} else if (ip_inp->inp_flags & INP_LOWPORT) {
|
|
if (p && (error =
|
|
priv_check(p, PRIV_NETINET_RESERVEDPORT)
|
|
)) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
|
|
return (error);
|
|
}
|
|
first = ipport_lowfirstauto;
|
|
last = ipport_lowlastauto;
|
|
} else {
|
|
first = ipport_firstauto;
|
|
last = ipport_lastauto;
|
|
}
|
|
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);
|
|
|
|
done = 0;
|
|
while (!done) {
|
|
if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) {
|
|
done = 1;
|
|
}
|
|
if (!done) {
|
|
if (--count == 0) {
|
|
SCTP_INP_DECR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
|
|
return (EADDRINUSE);
|
|
}
|
|
if (candidate == last)
|
|
candidate = first;
|
|
else
|
|
candidate = candidate + 1;
|
|
}
|
|
}
|
|
lport = htons(candidate);
|
|
}
|
|
SCTP_INP_DECR_REF(inp);
|
|
if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
|
|
SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
|
|
/*
|
|
* this really should not happen. The guy did a non-blocking
|
|
* bind and then did a close at the same time.
|
|
*/
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
/* ok we look clear to give out this port, so lets setup the binding */
|
|
if (bindall) {
|
|
/* binding to all addresses, so just set in the proper flags */
|
|
inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
|
|
/* set the automatic addr changes from kernel flag */
|
|
if (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);
|
|
}
|
|
/*
|
|
* set the automatic mobility_base from kernel flag (by
|
|
* micchie)
|
|
*/
|
|
if (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_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;
|
|
struct sockaddr_storage store_sa;
|
|
|
|
memset(&store_sa, 0, sizeof(store_sa));
|
|
if (addr->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *)&store_sa;
|
|
memcpy(sin, addr, sizeof(struct sockaddr_in));
|
|
sin->sin_port = 0;
|
|
} else if (addr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&store_sa;
|
|
memcpy(sin6, addr, sizeof(struct sockaddr_in6));
|
|
sin6->sin6_port = 0;
|
|
}
|
|
/*
|
|
* first find the interface with the bound address need to
|
|
* zero out the port to find the address! yuck! can't do
|
|
* this earlier since need port for sctp_pcb_findep()
|
|
*/
|
|
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
|
|
* (Panda).
|
|
*/
|
|
ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa,
|
|
vrf_id, SCTP_ADDR_NOT_LOCKED);
|
|
}
|
|
if (ifa == NULL) {
|
|
/* Can't find an interface with that address */
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
if (addr->sa_family == AF_INET6) {
|
|
/* GAK, more FIXME IFA lock? */
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
/* Can't bind a non-existent addr. */
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
/* 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) {
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (error);
|
|
}
|
|
inp->laddr_count++;
|
|
}
|
|
/* find the bucket */
|
|
head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport,
|
|
sctppcbinfo.hashmark)];
|
|
/* put it in the bucket */
|
|
LIST_INSERT_HEAD(head, inp, sctp_hash);
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n",
|
|
head, ntohs(lport));
|
|
/* set in the port */
|
|
inp->sctp_lport = lport;
|
|
|
|
/* turn off just the unbound flag */
|
|
inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (0);
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next)
|
|
{
|
|
struct sctp_iterator *it;
|
|
|
|
/*
|
|
* We enter with the only the ITERATOR_LOCK in place and a write
|
|
* lock on the inp_info stuff.
|
|
*/
|
|
|
|
/*
|
|
* Go through all iterators, we must do this since it is possible
|
|
* that some iterator does NOT have the lock, but is waiting for it.
|
|
* And the one that had the lock has either moved in the last
|
|
* iteration or we just cleared it above. We need to find all of
|
|
* those guys. The list of iterators should never be very big
|
|
* though.
|
|
*/
|
|
TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) {
|
|
if (it == inp->inp_starting_point_for_iterator)
|
|
/* skip this guy, he's special */
|
|
continue;
|
|
if (it->inp == inp) {
|
|
/*
|
|
* This is tricky and we DON'T lock the iterator.
|
|
* Reason is he's running but waiting for me since
|
|
* inp->inp_starting_point_for_iterator has the lock
|
|
* on me (the guy above we skipped). This tells us
|
|
* its is not running but waiting for
|
|
* inp->inp_starting_point_for_iterator to be
|
|
* released by the guy that does have our INP in a
|
|
* lock.
|
|
*/
|
|
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
|
|
it->inp = NULL;
|
|
it->stcb = NULL;
|
|
} else {
|
|
/* set him up to do the next guy not me */
|
|
it->inp = inp_next;
|
|
it->stcb = NULL;
|
|
}
|
|
}
|
|
}
|
|
it = inp->inp_starting_point_for_iterator;
|
|
if (it) {
|
|
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
|
|
it->inp = NULL;
|
|
} else {
|
|
it->inp = inp_next;
|
|
}
|
|
it->stcb = NULL;
|
|
}
|
|
}
|
|
|
|
/* release sctp_inpcb unbind the port */
|
|
void
|
|
sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
|
|
{
|
|
/*
|
|
* Here we free a endpoint. We must find it (if it is in the Hash
|
|
* table) and remove it from there. Then we must also find it in the
|
|
* overall list and remove it from there. After all removals are
|
|
* complete then any timer has to be stopped. Then start the actual
|
|
* freeing. a) Any local lists. b) Any associations. c) The hash of
|
|
* all associations. d) finally the ep itself.
|
|
*/
|
|
struct sctp_pcb *m;
|
|
struct sctp_inpcb *inp_save;
|
|
struct sctp_tcb *asoc, *nasoc;
|
|
struct sctp_laddr *laddr, *nladdr;
|
|
struct inpcb *ip_pcb;
|
|
struct socket *so;
|
|
|
|
struct sctp_queued_to_read *sq;
|
|
|
|
|
|
int cnt;
|
|
sctp_sharedkey_t *shared_key;
|
|
|
|
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 0);
|
|
#endif
|
|
SCTP_ITERATOR_LOCK();
|
|
so = inp->sctp_socket;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
|
|
/* been here before.. eeks.. get out of here */
|
|
SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
|
|
SCTP_ITERATOR_UNLOCK();
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 1);
|
|
#endif
|
|
return;
|
|
}
|
|
SCTP_ASOC_CREATE_LOCK(inp);
|
|
SCTP_INP_INFO_WLOCK();
|
|
|
|
SCTP_INP_WLOCK(inp);
|
|
/* First time through we have the socket lock, after that no more. */
|
|
if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
|
|
/*
|
|
* Once we are in we can remove the flag from = 1 is only
|
|
* passed from the actual closing routines that are called
|
|
* via the sockets layer.
|
|
*/
|
|
inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
|
|
/* 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;
|
|
}
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
|
|
SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
|
|
|
|
if (inp->control) {
|
|
sctp_m_freem(inp->control);
|
|
inp->control = NULL;
|
|
}
|
|
if (inp->pkt) {
|
|
sctp_m_freem(inp->pkt);
|
|
inp->pkt = NULL;
|
|
}
|
|
m = &inp->sctp_ep;
|
|
ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer
|
|
* here but I will be nice :> (i.e.
|
|
* ip_pcb = ep;) */
|
|
if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
|
|
int cnt_in_sd;
|
|
|
|
cnt_in_sd = 0;
|
|
for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
|
|
asoc = nasoc) {
|
|
SCTP_TCB_LOCK(asoc);
|
|
nasoc = LIST_NEXT(asoc, sctp_tcblist);
|
|
if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
/* Skip guys being freed */
|
|
/* asoc->sctp_socket = NULL; FIXME MT */
|
|
cnt_in_sd++;
|
|
SCTP_TCB_UNLOCK(asoc);
|
|
continue;
|
|
}
|
|
if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
/*
|
|
* 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, asoc, SCTP_PCBFREE_NOFORCE,
|
|
SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
|
|
cnt_in_sd++;
|
|
}
|
|
continue;
|
|
}
|
|
/* Disconnect the socket please */
|
|
asoc->sctp_socket = NULL;
|
|
asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
|
|
if ((asoc->asoc.size_on_reasm_queue > 0) ||
|
|
(asoc->asoc.control_pdapi) ||
|
|
(asoc->asoc.size_on_all_streams > 0) ||
|
|
(so && (so->so_rcv.sb_cc > 0))
|
|
) {
|
|
/* Left with Data unread */
|
|
struct mbuf *op_err;
|
|
|
|
op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
|
|
0, M_DONTWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
/* Fill in the user initiated abort */
|
|
struct sctp_paramhdr *ph;
|
|
uint32_t *ippp;
|
|
|
|
SCTP_BUF_LEN(op_err) =
|
|
sizeof(struct sctp_paramhdr) + sizeof(uint32_t);
|
|
ph = mtod(op_err,
|
|
struct sctp_paramhdr *);
|
|
ph->param_type = htons(
|
|
SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons(SCTP_BUF_LEN(op_err));
|
|
ippp = (uint32_t *) (ph + 1);
|
|
*ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3);
|
|
}
|
|
asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
|
|
#if defined(SCTP_PANIC_ON_ABORT)
|
|
panic("inpcb_free does an abort");
|
|
#endif
|
|
sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
|
|
if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
if (sctp_free_assoc(inp, asoc,
|
|
SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
|
|
cnt_in_sd++;
|
|
}
|
|
continue;
|
|
} else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
|
|
TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
|
|
(asoc->asoc.stream_queue_cnt == 0)
|
|
) {
|
|
if (asoc->asoc.locked_on_sending) {
|
|
goto abort_anyway;
|
|
}
|
|
if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
/*
|
|
* there is nothing queued to send,
|
|
* so I send shutdown
|
|
*/
|
|
sctp_send_shutdown(asoc, asoc->asoc.primary_destination);
|
|
if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
|
|
SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
|
|
asoc->asoc.primary_destination);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
|
|
asoc->asoc.primary_destination);
|
|
sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
|
|
}
|
|
} else {
|
|
/* mark into shutdown pending */
|
|
struct sctp_stream_queue_pending *sp;
|
|
|
|
asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
|
|
asoc->asoc.primary_destination);
|
|
if (asoc->asoc.locked_on_sending) {
|
|
sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
|
|
sctp_streamhead);
|
|
if (sp == NULL) {
|
|
SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
|
|
asoc->asoc.locked_on_sending,
|
|
asoc->asoc.locked_on_sending->stream_no);
|
|
} else {
|
|
if ((sp->length == 0) && (sp->msg_is_complete == 0))
|
|
asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
|
|
}
|
|
}
|
|
if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
|
|
TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
|
|
(asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
|
|
struct mbuf *op_err;
|
|
|
|
abort_anyway:
|
|
op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
|
|
0, M_DONTWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
/*
|
|
* Fill in the user
|
|
* initiated abort
|
|
*/
|
|
struct sctp_paramhdr *ph;
|
|
uint32_t *ippp;
|
|
|
|
SCTP_BUF_LEN(op_err) =
|
|
(sizeof(struct sctp_paramhdr) +
|
|
sizeof(uint32_t));
|
|
ph = mtod(op_err,
|
|
struct sctp_paramhdr *);
|
|
ph->param_type = htons(
|
|
SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons(SCTP_BUF_LEN(op_err));
|
|
ippp = (uint32_t *) (ph + 1);
|
|
*ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5);
|
|
}
|
|
asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
|
|
#if defined(SCTP_PANIC_ON_ABORT)
|
|
panic("inpcb_free does an abort");
|
|
#endif
|
|
|
|
sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
|
|
if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
if (sctp_free_assoc(inp, asoc,
|
|
SCTP_PCBFREE_NOFORCE,
|
|
SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
|
|
cnt_in_sd++;
|
|
}
|
|
continue;
|
|
} else {
|
|
sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
|
|
}
|
|
}
|
|
cnt_in_sd++;
|
|
SCTP_TCB_UNLOCK(asoc);
|
|
}
|
|
/* now is there some left in our SHUTDOWN state? */
|
|
if (cnt_in_sd) {
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_ITERATOR_UNLOCK();
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 2);
|
|
#endif
|
|
return;
|
|
}
|
|
}
|
|
inp->sctp_socket = NULL;
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
|
|
SCTP_PCB_FLAGS_UNBOUND) {
|
|
/*
|
|
* ok, this guy has been bound. It's port is somewhere in
|
|
* the sctppcbinfo hash table. Remove it!
|
|
*/
|
|
LIST_REMOVE(inp, sctp_hash);
|
|
inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
|
|
}
|
|
/*
|
|
* If there is a timer running to kill us, forget it, since it may
|
|
* have a contest on the INP lock.. which would cause us to die ...
|
|
*/
|
|
cnt = 0;
|
|
for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL;
|
|
asoc = nasoc) {
|
|
nasoc = LIST_NEXT(asoc, sctp_tcblist);
|
|
if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
cnt++;
|
|
continue;
|
|
}
|
|
/* Free associations that are NOT killing us */
|
|
SCTP_TCB_LOCK(asoc);
|
|
if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
|
|
((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
|
|
struct mbuf *op_err;
|
|
uint32_t *ippp;
|
|
|
|
op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)),
|
|
0, M_DONTWAIT, 1, MT_DATA);
|
|
if (op_err) {
|
|
/* Fill in the user initiated abort */
|
|
struct sctp_paramhdr *ph;
|
|
|
|
SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) +
|
|
sizeof(uint32_t));
|
|
ph = mtod(op_err, struct sctp_paramhdr *);
|
|
ph->param_type = htons(
|
|
SCTP_CAUSE_USER_INITIATED_ABT);
|
|
ph->param_length = htons(SCTP_BUF_LEN(op_err));
|
|
ippp = (uint32_t *) (ph + 1);
|
|
*ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7);
|
|
|
|
}
|
|
asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
|
|
#if defined(SCTP_PANIC_ON_ABORT)
|
|
panic("inpcb_free does an abort");
|
|
#endif
|
|
sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
|
|
} else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
|
|
cnt++;
|
|
SCTP_TCB_UNLOCK(asoc);
|
|
continue;
|
|
}
|
|
if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
|
|
cnt++;
|
|
}
|
|
}
|
|
if (cnt) {
|
|
/* Ok we have someone out there that will kill us */
|
|
(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_ITERATOR_UNLOCK();
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 3);
|
|
#endif
|
|
return;
|
|
}
|
|
if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
|
|
(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_ASOC_CREATE_UNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_ITERATOR_UNLOCK();
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 4);
|
|
#endif
|
|
return;
|
|
}
|
|
(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
|
|
inp->sctp_ep.signature_change.type = 0;
|
|
inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
|
|
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 5);
|
|
#endif
|
|
|
|
(void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
|
|
inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE;
|
|
/* Clear the read queue */
|
|
/* sa_ignore FREED_MEMORY */
|
|
while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) {
|
|
/* 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_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
|
|
SCTP_DECR_READQ_COUNT();
|
|
}
|
|
/* Now the sctp_pcb things */
|
|
/*
|
|
* free each asoc if it is not already closed/free. we can't use the
|
|
* macro here since le_next will get freed as part of the
|
|
* sctp_free_assoc() call.
|
|
*/
|
|
cnt = 0;
|
|
if (so) {
|
|
#ifdef IPSEC
|
|
ipsec4_delete_pcbpolicy(ip_pcb);
|
|
#endif /* IPSEC */
|
|
|
|
/* Unlocks not needed since the socket is gone now */
|
|
}
|
|
if (ip_pcb->inp_options) {
|
|
(void)sctp_m_free(ip_pcb->inp_options);
|
|
ip_pcb->inp_options = 0;
|
|
}
|
|
if (ip_pcb->inp_moptions) {
|
|
inp_freemoptions(ip_pcb->inp_moptions);
|
|
ip_pcb->inp_moptions = 0;
|
|
}
|
|
#ifdef INET6
|
|
if (ip_pcb->inp_vflag & INP_IPV6) {
|
|
struct in6pcb *in6p;
|
|
|
|
in6p = (struct in6pcb *)inp;
|
|
ip6_freepcbopts(in6p->in6p_outputopts);
|
|
}
|
|
#endif /* INET6 */
|
|
ip_pcb->inp_vflag = 0;
|
|
/* free up authentication fields */
|
|
if (inp->sctp_ep.local_auth_chunks != NULL)
|
|
sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
|
|
if (inp->sctp_ep.local_hmacs != NULL)
|
|
sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
|
|
|
|
shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
|
|
while (shared_key) {
|
|
LIST_REMOVE(shared_key, next);
|
|
sctp_free_sharedkey(shared_key);
|
|
/* sa_ignore FREED_MEMORY */
|
|
shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys);
|
|
}
|
|
|
|
inp_save = LIST_NEXT(inp, sctp_list);
|
|
LIST_REMOVE(inp, sctp_list);
|
|
|
|
/* fix any iterators only after out of the list */
|
|
sctp_iterator_inp_being_freed(inp, inp_save);
|
|
/*
|
|
* if we have an address list the following will free the list of
|
|
* ifaddr's that are set into this ep. Again macro limitations here,
|
|
* since the LIST_FOREACH could be a bad idea.
|
|
*/
|
|
for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL;
|
|
laddr = nladdr) {
|
|
nladdr = LIST_NEXT(laddr, sctp_nxt_addr);
|
|
sctp_remove_laddr(laddr);
|
|
}
|
|
|
|
#ifdef SCTP_TRACK_FREED_ASOCS
|
|
/* TEMP CODE */
|
|
for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL;
|
|
asoc = nasoc) {
|
|
nasoc = LIST_NEXT(asoc, sctp_tcblist);
|
|
LIST_REMOVE(asoc, sctp_tcblist);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc);
|
|
SCTP_DECR_ASOC_COUNT();
|
|
}
|
|
/* *** END TEMP CODE *** */
|
|
#endif
|
|
/* Now lets see about freeing the EP hash table. */
|
|
if (inp->sctp_tcbhash != NULL) {
|
|
SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
|
|
inp->sctp_tcbhash = NULL;
|
|
}
|
|
/* Now we must put the ep memory back into the zone pool */
|
|
INP_LOCK_DESTROY(&inp->ip_inp.inp);
|
|
SCTP_INP_LOCK_DESTROY(inp);
|
|
SCTP_INP_READ_DESTROY(inp);
|
|
SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_ITERATOR_UNLOCK();
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp);
|
|
SCTP_DECR_EP_COUNT();
|
|
}
|
|
|
|
|
|
struct sctp_nets *
|
|
sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
|
|
{
|
|
struct sctp_nets *net;
|
|
|
|
/* locate the address */
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
|
|
return (net);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
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,
|
|
int set_scope, int from)
|
|
{
|
|
/*
|
|
* The following is redundant to the same lines in the
|
|
* sctp_aloc_assoc() but is needed since other's call the add
|
|
* address function
|
|
*/
|
|
struct sctp_nets *net, *netfirst;
|
|
int addr_inscope;
|
|
|
|
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;
|
|
if (newaddr->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *)newaddr;
|
|
if (sin->sin_addr.s_addr == 0) {
|
|
/* Invalid address */
|
|
return (-1);
|
|
}
|
|
/* zero out the bzero area */
|
|
memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
|
|
|
|
/* assure len is set */
|
|
sin->sin_len = sizeof(struct sockaddr_in);
|
|
if (set_scope) {
|
|
#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
|
|
stcb->ipv4_local_scope = 1;
|
|
#else
|
|
if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
|
|
stcb->asoc.ipv4_local_scope = 1;
|
|
}
|
|
#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */
|
|
} else {
|
|
/* Validate the address is in scope */
|
|
if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
|
|
(stcb->asoc.ipv4_local_scope == 0)) {
|
|
addr_inscope = 0;
|
|
}
|
|
}
|
|
} else if (newaddr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)newaddr;
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
/* Invalid address */
|
|
return (-1);
|
|
}
|
|
/* assure len is set */
|
|
sin6->sin6_len = sizeof(struct sockaddr_in6);
|
|
if (set_scope) {
|
|
if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
|
|
stcb->asoc.loopback_scope = 1;
|
|
stcb->asoc.local_scope = 0;
|
|
stcb->asoc.ipv4_local_scope = 1;
|
|
stcb->asoc.site_scope = 1;
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
|
|
/*
|
|
* If the new destination is a LINK_LOCAL we
|
|
* must have common site scope. Don't set
|
|
* the local scope since we may not share
|
|
* all links, only loopback can do this.
|
|
* Links on the local network would also be
|
|
* on our private network for v4 too.
|
|
*/
|
|
stcb->asoc.ipv4_local_scope = 1;
|
|
stcb->asoc.site_scope = 1;
|
|
} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
|
|
/*
|
|
* If the new destination is SITE_LOCAL then
|
|
* we must have site scope in common.
|
|
*/
|
|
stcb->asoc.site_scope = 1;
|
|
}
|
|
} else {
|
|
/* Validate the address is in scope */
|
|
if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
|
|
(stcb->asoc.loopback_scope == 0)) {
|
|
addr_inscope = 0;
|
|
} else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
|
|
(stcb->asoc.local_scope == 0)) {
|
|
addr_inscope = 0;
|
|
} else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
|
|
(stcb->asoc.site_scope == 0)) {
|
|
addr_inscope = 0;
|
|
}
|
|
}
|
|
} else {
|
|
/* not supported family type */
|
|
return (-1);
|
|
}
|
|
net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets);
|
|
if (net == NULL) {
|
|
return (-1);
|
|
}
|
|
SCTP_INCR_RADDR_COUNT();
|
|
bzero(net, sizeof(*net));
|
|
(void)SCTP_GETTIME_TIMEVAL(&net->start_time);
|
|
memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
|
|
if (newaddr->sa_family == AF_INET) {
|
|
((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
|
|
} else if (newaddr->sa_family == AF_INET6) {
|
|
((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
|
|
}
|
|
net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
|
|
if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
|
|
stcb->asoc.loopback_scope = 1;
|
|
stcb->asoc.ipv4_local_scope = 1;
|
|
stcb->asoc.local_scope = 0;
|
|
stcb->asoc.site_scope = 1;
|
|
addr_inscope = 1;
|
|
}
|
|
net->failure_threshold = stcb->asoc.def_net_failure;
|
|
if (addr_inscope == 0) {
|
|
net->dest_state = (SCTP_ADDR_REACHABLE |
|
|
SCTP_ADDR_OUT_OF_SCOPE);
|
|
} else {
|
|
if (from == SCTP_ADDR_IS_CONFIRMED)
|
|
/* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
|
|
net->dest_state = SCTP_ADDR_REACHABLE;
|
|
else
|
|
net->dest_state = SCTP_ADDR_REACHABLE |
|
|
SCTP_ADDR_UNCONFIRMED;
|
|
}
|
|
/*
|
|
* We set this to 0, the timer code knows that this means its an
|
|
* initial value
|
|
*/
|
|
net->RTO = 0;
|
|
net->RTO_measured = 0;
|
|
stcb->asoc.numnets++;
|
|
*(&net->ref_count) = 1;
|
|
net->tos_flowlabel = 0;
|
|
#ifdef INET
|
|
if (newaddr->sa_family == AF_INET)
|
|
net->tos_flowlabel = stcb->asoc.default_tos;
|
|
#endif
|
|
#ifdef INET6
|
|
if (newaddr->sa_family == AF_INET6)
|
|
net->tos_flowlabel = stcb->asoc.default_flowlabel;
|
|
#endif
|
|
/* Init the timer structure */
|
|
SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&net->fr_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
|
|
|
|
/* Now generate a route for this guy */
|
|
/* KAME hack: embed scopeid */
|
|
if (newaddr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
(void)sa6_embedscope(sin6, ip6_use_defzone);
|
|
sin6->sin6_scope_id = 0;
|
|
}
|
|
SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
|
|
|
|
if (newaddr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
|
|
(void)sa6_recoverscope(sin6);
|
|
}
|
|
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);
|
|
/* Now get the interface MTU */
|
|
if (net->ro._s_addr && net->ro._s_addr->ifn_p) {
|
|
net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
|
|
} else {
|
|
net->mtu = 0;
|
|
}
|
|
#ifdef SCTP_PRINT_FOR_B_AND_M
|
|
SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu);
|
|
#endif
|
|
if (net->mtu == 0) {
|
|
/* Huh ?? */
|
|
net->mtu = SCTP_DEFAULT_MTU;
|
|
} else {
|
|
uint32_t rmtu;
|
|
|
|
rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
|
|
#ifdef SCTP_PRINT_FOR_B_AND_M
|
|
SCTP_PRINTF("The route mtu is %d\n", rmtu);
|
|
#endif
|
|
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);
|
|
} else {
|
|
/*
|
|
* we take the route mtu over the interface,
|
|
* since the route may be leading out the
|
|
* loopback, or a different interface.
|
|
*/
|
|
net->mtu = rmtu;
|
|
}
|
|
}
|
|
if (from == SCTP_ALLOC_ASOC) {
|
|
#ifdef SCTP_PRINT_FOR_B_AND_M
|
|
SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu);
|
|
#endif
|
|
stcb->asoc.smallest_mtu = net->mtu;
|
|
}
|
|
} else {
|
|
net->mtu = stcb->asoc.smallest_mtu;
|
|
}
|
|
if (stcb->asoc.smallest_mtu > net->mtu) {
|
|
#ifdef SCTP_PRINT_FOR_B_AND_M
|
|
SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n",
|
|
net->mtu, stcb->asoc.smallest_mtu);
|
|
#endif
|
|
stcb->asoc.smallest_mtu = net->mtu;
|
|
}
|
|
/* JRS - Use the congestion control given in the CC module */
|
|
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;
|
|
net->src_addr_selected = 0;
|
|
netfirst = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (net->ro.ro_rt == NULL) {
|
|
/* Since we have no route put it at the back */
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
|
|
} else if (netfirst == NULL) {
|
|
/* We are the first one in the pool. */
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
|
|
} else if (netfirst->ro.ro_rt == NULL) {
|
|
/*
|
|
* First one has NO route. Place this one ahead of the first
|
|
* one.
|
|
*/
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
|
|
} else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
|
|
/*
|
|
* This one has a different interface than the one at the
|
|
* top of the list. Place it ahead.
|
|
*/
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
|
|
} else {
|
|
/*
|
|
* Ok we have the same interface as the first one. Move
|
|
* forward until we find either a) one with a NULL route...
|
|
* insert ahead of that b) one with a different ifp.. insert
|
|
* after that. c) end of the list.. insert at the tail.
|
|
*/
|
|
struct sctp_nets *netlook;
|
|
|
|
do {
|
|
netlook = TAILQ_NEXT(netfirst, sctp_next);
|
|
if (netlook == NULL) {
|
|
/* End of the list */
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
|
|
break;
|
|
} else if (netlook->ro.ro_rt == NULL) {
|
|
/* next one has NO route */
|
|
TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
|
|
break;
|
|
} else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
|
|
TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
|
|
net, sctp_next);
|
|
break;
|
|
}
|
|
/* Shift forward */
|
|
netfirst = netlook;
|
|
} while (netlook != NULL);
|
|
}
|
|
|
|
/* got to have a primary set */
|
|
if (stcb->asoc.primary_destination == 0) {
|
|
stcb->asoc.primary_destination = net;
|
|
} else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
|
|
(net->ro.ro_rt) &&
|
|
((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
|
|
/* No route to current primary adopt new primary */
|
|
stcb->asoc.primary_destination = net;
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb,
|
|
net);
|
|
/* Validate primary is first */
|
|
net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if ((net != stcb->asoc.primary_destination) &&
|
|
(stcb->asoc.primary_destination)) {
|
|
/*
|
|
* first one on the list is NOT the primary sctp_cmpaddr()
|
|
* is much more efficent if the primary is the first on the
|
|
* list, make it so.
|
|
*/
|
|
TAILQ_REMOVE(&stcb->asoc.nets,
|
|
stcb->asoc.primary_destination, sctp_next);
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets,
|
|
stcb->asoc.primary_destination, sctp_next);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* allocate an association and add it to the endpoint. The caller must be
|
|
* careful to add all additional addresses once they are know right away or
|
|
* else the assoc will be may experience a blackout scenario.
|
|
*/
|
|
struct sctp_tcb *
|
|
sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
|
|
int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id,
|
|
struct thread *p
|
|
)
|
|
{
|
|
/* 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;
|
|
|
|
/*
|
|
* Assumption made here: Caller has done a
|
|
* sctp_findassociation_ep_addr(ep, addr's); to make sure the
|
|
* address does not exist already.
|
|
*/
|
|
if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) {
|
|
/* Hit max assoc, sorry no more */
|
|
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);
|
|
}
|
|
SCTP_INP_RLOCK(inp);
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
|
|
/*
|
|
* If its in the TCP pool, its NOT allowed to create an
|
|
* association. The parent listener needs to call
|
|
* sctp_aloc_assoc.. or the one-2-many socket. If a peeled
|
|
* off, or connected one does this.. its an error.
|
|
*/
|
|
SCTP_INP_RUNLOCK(inp);
|
|
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);
|
|
SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
|
|
ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
|
|
} else {
|
|
SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
|
|
}
|
|
#endif /* SCTP_DEBUG */
|
|
if (firstaddr->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *)firstaddr;
|
|
if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) {
|
|
/* Invalid address */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
rport = sin->sin_port;
|
|
} else if (firstaddr->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)firstaddr;
|
|
if ((sin6->sin6_port == 0) ||
|
|
(IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) {
|
|
/* Invalid address */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
rport = sin6->sin6_port;
|
|
} else {
|
|
/* not supported family type */
|
|
SCTP_INP_RUNLOCK(inp);
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
|
|
/*
|
|
* If you have not performed a bind, then we need to do the
|
|
* ephemerial bind for you.
|
|
*/
|
|
if ((err = sctp_inpcb_bind(inp->sctp_socket,
|
|
(struct sockaddr *)NULL,
|
|
(struct sctp_ifa *)NULL,
|
|
p
|
|
))) {
|
|
/* bind error, probably perm */
|
|
*error = err;
|
|
return (NULL);
|
|
}
|
|
}
|
|
stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb);
|
|
if (stcb == NULL) {
|
|
/* out of memory? */
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
|
|
*error = ENOMEM;
|
|
return (NULL);
|
|
}
|
|
SCTP_INCR_ASOC_COUNT();
|
|
|
|
bzero(stcb, sizeof(*stcb));
|
|
asoc = &stcb->asoc;
|
|
SCTP_TCB_LOCK_INIT(stcb);
|
|
SCTP_TCB_SEND_LOCK_INIT(stcb);
|
|
/* setup back pointer's */
|
|
stcb->sctp_ep = inp;
|
|
stcb->sctp_socket = inp->sctp_socket;
|
|
if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) {
|
|
/* failed */
|
|
SCTP_TCB_LOCK_DESTROY(stcb);
|
|
SCTP_TCB_SEND_LOCK_DESTROY(stcb);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
|
|
SCTP_DECR_ASOC_COUNT();
|
|
*error = err;
|
|
return (NULL);
|
|
}
|
|
/* and the port */
|
|
stcb->rport = rport;
|
|
SCTP_INP_INFO_WLOCK();
|
|
SCTP_INP_WLOCK(inp);
|
|
if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
|
|
/* inpcb freed while alloc going on */
|
|
SCTP_TCB_LOCK_DESTROY(stcb);
|
|
SCTP_TCB_SEND_LOCK_DESTROY(stcb);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_DECR_ASOC_COUNT();
|
|
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
*error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
SCTP_TCB_LOCK(stcb);
|
|
|
|
/* now that my_vtag is set, add it to the hash */
|
|
head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
|
|
sctppcbinfo.hashasocmark)];
|
|
/* put it in the bucket in the vtag hash of assoc's for the system */
|
|
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
|
|
sctp_delete_from_timewait(stcb->asoc.my_vtag);
|
|
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
|
|
if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
|
|
/* failure.. memory error? */
|
|
if (asoc->strmout) {
|
|
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
|
|
asoc->strmout = NULL;
|
|
}
|
|
if (asoc->mapping_array) {
|
|
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
|
|
asoc->mapping_array = NULL;
|
|
}
|
|
SCTP_DECR_ASOC_COUNT();
|
|
SCTP_TCB_LOCK_DESTROY(stcb);
|
|
SCTP_TCB_SEND_LOCK_DESTROY(stcb);
|
|
SCTP_ZONE_FREE(sctppcbinfo.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->hb_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
|
|
SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
|
|
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);
|
|
}
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb);
|
|
return (stcb);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
asoc = &stcb->asoc;
|
|
asoc->numnets--;
|
|
TAILQ_REMOVE(&asoc->nets, net, sctp_next);
|
|
if (net == asoc->primary_destination) {
|
|
/* Reset primary */
|
|
struct sctp_nets *lnet;
|
|
|
|
lnet = TAILQ_FIRST(&asoc->nets);
|
|
/*
|
|
* 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 leave;
|
|
}
|
|
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);
|
|
}
|
|
leave:
|
|
/* Try to find a confirmed primary */
|
|
asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
|
|
}
|
|
if (net == asoc->last_data_chunk_from) {
|
|
/* Reset primary */
|
|
asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
|
|
}
|
|
if (net == asoc->last_control_chunk_from) {
|
|
/* Clear net */
|
|
asoc->last_control_chunk_from = NULL;
|
|
}
|
|
sctp_free_remote_addr(net);
|
|
}
|
|
|
|
/*
|
|
* remove a remote endpoint address from an association, it will fail if the
|
|
* address does not exist.
|
|
*/
|
|
int
|
|
sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
|
|
{
|
|
/*
|
|
* Here we need to remove a remote address. This is quite simple, we
|
|
* first find it in the list of address for the association
|
|
* (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
|
|
* on that item. Note we do not allow it to be removed if there are
|
|
* no other addresses.
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_nets *net, *net_tmp;
|
|
|
|
asoc = &stcb->asoc;
|
|
|
|
/* locate the address */
|
|
for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) {
|
|
net_tmp = TAILQ_NEXT(net, sctp_next);
|
|
if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
|
|
continue;
|
|
}
|
|
if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
|
|
remaddr)) {
|
|
/* we found the guy */
|
|
if (asoc->numnets < 2) {
|
|
/* Must have at LEAST two remote addresses */
|
|
return (-1);
|
|
} else {
|
|
sctp_remove_net(stcb, net);
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
/* not found. */
|
|
return (-2);
|
|
}
|
|
|
|
void
|
|
sctp_delete_from_timewait(uint32_t tag)
|
|
{
|
|
struct sctpvtaghead *chain;
|
|
struct sctp_tagblock *twait_block;
|
|
int found = 0;
|
|
int i;
|
|
|
|
chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
|
|
if (!SCTP_LIST_EMPTY(chain)) {
|
|
LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
|
|
for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
|
|
if (twait_block->vtag_block[i].v_tag == tag) {
|
|
twait_block->vtag_block[i].tv_sec_at_expire = 0;
|
|
twait_block->vtag_block[i].v_tag = 0;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
sctp_is_in_timewait(uint32_t tag)
|
|
{
|
|
struct sctpvtaghead *chain;
|
|
struct sctp_tagblock *twait_block;
|
|
int found = 0;
|
|
int i;
|
|
|
|
chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
|
|
if (!SCTP_LIST_EMPTY(chain)) {
|
|
LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
|
|
for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
|
|
if (twait_block->vtag_block[i].v_tag == tag) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
}
|
|
return (found);
|
|
}
|
|
|
|
|
|
void
|
|
sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time)
|
|
{
|
|
struct sctpvtaghead *chain;
|
|
struct sctp_tagblock *twait_block;
|
|
struct timeval now;
|
|
int set, i;
|
|
|
|
(void)SCTP_GETTIME_TIMEVAL(&now);
|
|
chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
|
|
set = 0;
|
|
if (!SCTP_LIST_EMPTY(chain)) {
|
|
/* Block(s) present, lets find space, and expire on the fly */
|
|
LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
|
|
for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
|
|
if ((twait_block->vtag_block[i].v_tag == 0) &&
|
|
!set) {
|
|
twait_block->vtag_block[i].tv_sec_at_expire =
|
|
now.tv_sec + time;
|
|
twait_block->vtag_block[i].v_tag = tag;
|
|
set = 1;
|
|
} else if ((twait_block->vtag_block[i].v_tag) &&
|
|
((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
|
|
/* Audit expires this guy */
|
|
twait_block->vtag_block[i].tv_sec_at_expire = 0;
|
|
twait_block->vtag_block[i].v_tag = 0;
|
|
if (set == 0) {
|
|
/* Reuse it for my new tag */
|
|
twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
|
|
twait_block->vtag_block[0].v_tag = tag;
|
|
set = 1;
|
|
}
|
|
}
|
|
}
|
|
if (set) {
|
|
/*
|
|
* We only do up to the block where we can
|
|
* place our tag for audits
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
/* Need to add a new block to chain */
|
|
if (!set) {
|
|
SCTP_MALLOC(twait_block, struct sctp_tagblock *,
|
|
sizeof(struct sctp_tagblock), 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);
|
|
twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
|
|
twait_block->vtag_block[0].v_tag = tag;
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_iterator *it;
|
|
|
|
/*
|
|
* Unlock the tcb lock we do this so we avoid a dead lock scenario
|
|
* where the iterator is waiting on the TCB lock and the TCB lock is
|
|
* waiting on the iterator lock.
|
|
*/
|
|
it = stcb->asoc.stcb_starting_point_for_iterator;
|
|
if (it == NULL) {
|
|
return;
|
|
}
|
|
if (it->inp != stcb->sctp_ep) {
|
|
/* hmm, focused on the wrong one? */
|
|
return;
|
|
}
|
|
if (it->stcb != stcb) {
|
|
return;
|
|
}
|
|
it->stcb = LIST_NEXT(stcb, sctp_tcblist);
|
|
if (it->stcb == NULL) {
|
|
/* done with all asoc's in this assoc */
|
|
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
|
|
it->inp = NULL;
|
|
} else {
|
|
it->inp = LIST_NEXT(inp, sctp_list);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*-
|
|
* Free the association after un-hashing the remote port. 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, *prev;
|
|
struct sctp_laddr *laddr;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_asconf_addr *aparam;
|
|
struct sctp_asconf_ack *aack;
|
|
struct sctp_stream_reset_list *liste;
|
|
struct sctp_queued_to_read *sq;
|
|
struct sctp_stream_queue_pending *sp;
|
|
sctp_sharedkey_t *shared_key;
|
|
struct socket *so;
|
|
int ccnt = 0;
|
|
int cnt = 0;
|
|
|
|
/* first, lets purge the entry from the hash table. */
|
|
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, stcb, 6);
|
|
#endif
|
|
if (stcb->asoc.state == 0) {
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 7);
|
|
#endif
|
|
/* there is no asoc, really TSNH :-0 */
|
|
return (1);
|
|
}
|
|
/* TEMP CODE */
|
|
if (stcb->freed_from_where == 0) {
|
|
/* Only record the first place free happened from */
|
|
stcb->freed_from_where = from_location;
|
|
}
|
|
/* TEMP CODE */
|
|
|
|
asoc = &stcb->asoc;
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
|
|
/* nothing around */
|
|
so = NULL;
|
|
else
|
|
so = inp->sctp_socket;
|
|
|
|
/*
|
|
* We used timer based freeing if a reader or writer is in the way.
|
|
* So we first check if we are actually being called from a timer,
|
|
* if so we abort early if a reader or writer is still in the way.
|
|
*/
|
|
if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
|
|
(from_inpcbfree == SCTP_NORMAL_PROC)) {
|
|
/*
|
|
* is it the timer driving us? if so are the reader/writers
|
|
* gone?
|
|
*/
|
|
if (stcb->asoc.refcnt) {
|
|
/* nope, reader or writer in the way */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
|
|
/* no asoc destroyed */
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, stcb, 8);
|
|
#endif
|
|
return (0);
|
|
}
|
|
}
|
|
/* now clean up any other timers */
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
|
|
asoc->hb_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
|
|
asoc->dack_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
|
|
/*-
|
|
* For stream reset we don't blast this unless
|
|
* it is a str-reset timer, it might be the
|
|
* free-asoc timer which we DON'T want to
|
|
* disturb.
|
|
*/
|
|
if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
|
|
asoc->strreset_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
|
|
asoc->asconf_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
|
|
asoc->autoclose_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
|
|
asoc->shut_guard_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
|
|
asoc->delayed_event_timer.self = NULL;
|
|
/* Mobility adaptation */
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
|
|
asoc->delete_prim_timer.self = NULL;
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
(void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
|
|
net->fr_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
|
|
net->rxt_timer.self = NULL;
|
|
(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
|
|
net->pmtu_timer.self = NULL;
|
|
}
|
|
/* Now the read queue needs to be cleaned up (only once) */
|
|
cnt = 0;
|
|
if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
|
|
stcb->asoc.state |= 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_is_feature_on(inp, 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->sinfo_ssn;
|
|
sctp_notify_partial_delivery_indication(stcb,
|
|
SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq);
|
|
stcb->asoc.control_pdapi = NULL;
|
|
}
|
|
}
|
|
/* Add an end to wake them */
|
|
sq->end_added = 1;
|
|
cnt++;
|
|
}
|
|
}
|
|
SCTP_INP_READ_UNLOCK(inp);
|
|
if (stcb->block_entry) {
|
|
cnt++;
|
|
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) {
|
|
/*
|
|
* reader or writer in the way, we have hopefully given him
|
|
* something to chew on above.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
if ((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);
|
|
}
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, stcb, 9);
|
|
#endif
|
|
/* no asoc destroyed */
|
|
return (0);
|
|
}
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, stcb, 10);
|
|
#endif
|
|
/*
|
|
* When I reach here, no others want to kill the assoc yet.. and I
|
|
* own the lock. Now its possible an abort comes in when I do the
|
|
* lock exchange below to grab all the locks to do the final take
|
|
* out. to prevent this we increment the count, which will start a
|
|
* timer and blow out above thus assuring us that we hold exclusive
|
|
* killing of the asoc. Note that after getting back the TCB lock we
|
|
* will go ahead and increment the counter back up and stop any
|
|
* timer a passing stranger may have started :-S
|
|
*/
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
|
|
SCTP_ITERATOR_LOCK();
|
|
SCTP_INP_INFO_WLOCK();
|
|
SCTP_INP_WLOCK(inp);
|
|
SCTP_TCB_LOCK(stcb);
|
|
}
|
|
/* Double check the GONE flag */
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
|
|
/* nothing around */
|
|
so = NULL;
|
|
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
/*
|
|
* For TCP type we need special handling when we are
|
|
* connected. We also include the peel'ed off ones to.
|
|
*/
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
|
|
inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
|
|
inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
|
|
if (so) {
|
|
SOCK_LOCK(so);
|
|
if (so->so_rcv.sb_cc == 0) {
|
|
so->so_state &= ~(SS_ISCONNECTING |
|
|
SS_ISDISCONNECTING |
|
|
SS_ISCONFIRMING |
|
|
SS_ISCONNECTED);
|
|
}
|
|
SOCK_UNLOCK(so);
|
|
socantrcvmore(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.
|
|
*/
|
|
sctp_iterator_asoc_being_freed(inp, stcb);
|
|
/* re-increment the lock */
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
}
|
|
asoc->state = 0;
|
|
if (inp->sctp_tcbhash) {
|
|
LIST_REMOVE(stcb, sctp_tcbhash);
|
|
}
|
|
if (stcb->asoc.in_restart_hash) {
|
|
LIST_REMOVE(stcb, sctp_tcbrestarhash);
|
|
}
|
|
/* Now lets remove it from the list of ALL associations in the EP */
|
|
LIST_REMOVE(stcb, sctp_tcblist);
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
SCTP_INP_INCR_REF(inp);
|
|
SCTP_INP_WUNLOCK(inp);
|
|
SCTP_ITERATOR_UNLOCK();
|
|
}
|
|
/* pull from vtag hash */
|
|
LIST_REMOVE(stcb, sctp_asocs);
|
|
sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT);
|
|
|
|
/*
|
|
* Now restop the timers to be sure - this is paranoia at is finest!
|
|
*/
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
|
|
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
|
|
(void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
|
|
(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
|
|
}
|
|
|
|
asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
|
|
prev = NULL;
|
|
/*
|
|
* The chunk lists and such SHOULD be empty but we check them just
|
|
* in case.
|
|
*/
|
|
/* anything on the wheel needs to be removed */
|
|
for (i = 0; i < asoc->streamoutcnt; i++) {
|
|
struct sctp_stream_out *outs;
|
|
|
|
outs = &asoc->strmout[i];
|
|
/* now clean up any chunks here */
|
|
sp = TAILQ_FIRST(&outs->outqueue);
|
|
while (sp) {
|
|
TAILQ_REMOVE(&outs->outqueue, sp, next);
|
|
if (sp->data) {
|
|
sctp_m_freem(sp->data);
|
|
sp->data = NULL;
|
|
sp->tail_mbuf = NULL;
|
|
}
|
|
sctp_free_remote_addr(sp->net);
|
|
sctp_free_spbufspace(stcb, asoc, sp);
|
|
/* Free the zone stuff */
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp);
|
|
SCTP_DECR_STRMOQ_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
sp = TAILQ_FIRST(&outs->outqueue);
|
|
}
|
|
}
|
|
|
|
/* sa_ignore FREED_MEMORY */
|
|
while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) {
|
|
TAILQ_REMOVE(&asoc->resetHead, liste, next_resp);
|
|
SCTP_FREE(liste, SCTP_M_STRESET);
|
|
}
|
|
|
|
sq = TAILQ_FIRST(&asoc->pending_reply_queue);
|
|
while (sq) {
|
|
TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
|
|
if (sq->data) {
|
|
sctp_m_freem(sq->data);
|
|
sq->data = NULL;
|
|
}
|
|
sctp_free_remote_addr(sq->whoFrom);
|
|
sq->whoFrom = NULL;
|
|
sq->stcb = NULL;
|
|
/* Free the ctl entry */
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq);
|
|
SCTP_DECR_READQ_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
sq = TAILQ_FIRST(&asoc->pending_reply_queue);
|
|
}
|
|
|
|
chk = TAILQ_FIRST(&asoc->free_chunks);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
ccnt++;
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
SCTP_DECR_CHK_COUNT();
|
|
atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1);
|
|
asoc->free_chunk_cnt--;
|
|
/* sa_ignore FREED_MEMORY */
|
|
chk = TAILQ_FIRST(&asoc->free_chunks);
|
|
}
|
|
/* pending send queue SHOULD be empty */
|
|
if (!TAILQ_EMPTY(&asoc->send_queue)) {
|
|
chk = TAILQ_FIRST(&asoc->send_queue);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
ccnt++;
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
SCTP_DECR_CHK_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
chk = TAILQ_FIRST(&asoc->send_queue);
|
|
}
|
|
}
|
|
/*
|
|
if(ccnt) {
|
|
printf("Freed %d from send_queue\n", ccnt);
|
|
ccnt = 0;
|
|
}
|
|
*/
|
|
/* sent queue SHOULD be empty */
|
|
if (!TAILQ_EMPTY(&asoc->sent_queue)) {
|
|
chk = TAILQ_FIRST(&asoc->sent_queue);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
ccnt++;
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
SCTP_DECR_CHK_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
chk = TAILQ_FIRST(&asoc->sent_queue);
|
|
}
|
|
}
|
|
/*
|
|
if(ccnt) {
|
|
printf("Freed %d from sent_queue\n", ccnt);
|
|
ccnt = 0;
|
|
}
|
|
*/
|
|
/* control queue MAY not be empty */
|
|
if (!TAILQ_EMPTY(&asoc->control_send_queue)) {
|
|
chk = TAILQ_FIRST(&asoc->control_send_queue);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
ccnt++;
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
SCTP_DECR_CHK_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
chk = TAILQ_FIRST(&asoc->control_send_queue);
|
|
}
|
|
}
|
|
/*
|
|
if(ccnt) {
|
|
printf("Freed %d from ctrl_queue\n", ccnt);
|
|
ccnt = 0;
|
|
}
|
|
*/
|
|
if (!TAILQ_EMPTY(&asoc->reasmqueue)) {
|
|
chk = TAILQ_FIRST(&asoc->reasmqueue);
|
|
while (chk) {
|
|
TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
sctp_free_remote_addr(chk->whoTo);
|
|
ccnt++;
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk);
|
|
SCTP_DECR_CHK_COUNT();
|
|
/* sa_ignore FREED_MEMORY */
|
|
chk = TAILQ_FIRST(&asoc->reasmqueue);
|
|
}
|
|
}
|
|
/*
|
|
if(ccnt) {
|
|
printf("Freed %d from reasm_queue\n", ccnt);
|
|
ccnt = 0;
|
|
}
|
|
*/
|
|
if (asoc->mapping_array) {
|
|
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
|
|
asoc->mapping_array = NULL;
|
|
}
|
|
/* the stream outs */
|
|
if (asoc->strmout) {
|
|
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
|
|
asoc->strmout = NULL;
|
|
}
|
|
asoc->streamoutcnt = 0;
|
|
if (asoc->strmin) {
|
|
struct sctp_queued_to_read *ctl;
|
|
|
|
for (i = 0; i < asoc->streamincnt; i++) {
|
|
if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) {
|
|
/* We have somethings on the streamin queue */
|
|
ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
|
|
while (ctl) {
|
|
TAILQ_REMOVE(&asoc->strmin[i].inqueue,
|
|
ctl, next);
|
|
sctp_free_remote_addr(ctl->whoFrom);
|
|
if (ctl->data) {
|
|
sctp_m_freem(ctl->data);
|
|
ctl->data = NULL;
|
|
}
|
|
/*
|
|
* We don't free the address here
|
|
* since all the net's were freed
|
|
* above.
|
|
*/
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
|
|
SCTP_DECR_READQ_COUNT();
|
|
ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue);
|
|
}
|
|
}
|
|
}
|
|
SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
|
|
asoc->strmin = NULL;
|
|
}
|
|
asoc->streamincnt = 0;
|
|
while (!TAILQ_EMPTY(&asoc->nets)) {
|
|
/* sa_ignore FREED_MEMORY */
|
|
net = TAILQ_FIRST(&asoc->nets);
|
|
/* pull from list */
|
|
if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) {
|
|
#ifdef INVARIANTS
|
|
panic("no net's left alloc'ed, or list points to itself");
|
|
#endif
|
|
break;
|
|
}
|
|
prev = net;
|
|
TAILQ_REMOVE(&asoc->nets, net, sctp_next);
|
|
sctp_free_remote_addr(net);
|
|
}
|
|
|
|
while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) {
|
|
/* sa_ignore FREED_MEMORY */
|
|
laddr = LIST_FIRST(&asoc->sctp_restricted_addrs);
|
|
sctp_remove_laddr(laddr);
|
|
}
|
|
|
|
/* pending asconf (address) parameters */
|
|
while (!TAILQ_EMPTY(&asoc->asconf_queue)) {
|
|
/* sa_ignore FREED_MEMORY */
|
|
aparam = TAILQ_FIRST(&asoc->asconf_queue);
|
|
TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
|
|
SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
|
|
}
|
|
while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) {
|
|
/* sa_ignore FREED_MEMORY */
|
|
aack = TAILQ_FIRST(&asoc->asconf_ack_sent);
|
|
TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
|
|
if (aack->data != NULL) {
|
|
sctp_m_freem(aack->data);
|
|
}
|
|
SCTP_ZONE_FREE(sctppcbinfo.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);
|
|
|
|
shared_key = LIST_FIRST(&asoc->shared_keys);
|
|
while (shared_key) {
|
|
LIST_REMOVE(shared_key, next);
|
|
sctp_free_sharedkey(shared_key);
|
|
/* sa_ignore FREED_MEMORY */
|
|
shared_key = LIST_FIRST(&asoc->shared_keys);
|
|
}
|
|
|
|
/* Insert new items here :> */
|
|
|
|
/* Get rid of LOCK */
|
|
SCTP_TCB_LOCK_DESTROY(stcb);
|
|
SCTP_TCB_SEND_LOCK_DESTROY(stcb);
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
SCTP_INP_RLOCK(inp);
|
|
}
|
|
#ifdef SCTP_TRACK_FREED_ASOCS
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/* now clean up the tasoc itself */
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
|
|
SCTP_DECR_ASOC_COUNT();
|
|
} else {
|
|
LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
|
|
}
|
|
#else
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb);
|
|
SCTP_DECR_ASOC_COUNT();
|
|
#endif
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/*
|
|
* If its NOT the inp_free calling us AND sctp_close
|
|
* as been called, we call back...
|
|
*/
|
|
SCTP_INP_RUNLOCK(inp);
|
|
/*
|
|
* This will start the kill timer (if we are the
|
|
* lastone) since we hold an increment yet. But this
|
|
* is the only safe way to do this since otherwise
|
|
* if the socket closes at the same time we are here
|
|
* we might collide in the cleanup.
|
|
*/
|
|
sctp_inpcb_free(inp,
|
|
SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
|
|
SCTP_CALLED_DIRECTLY_NOCMPSET);
|
|
SCTP_INP_DECR_REF(inp);
|
|
goto out_of;
|
|
} else {
|
|
/* The socket is still open. */
|
|
SCTP_INP_DECR_REF(inp);
|
|
}
|
|
}
|
|
if (from_inpcbfree == SCTP_NORMAL_PROC) {
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
out_of:
|
|
/* destroyed the asoc */
|
|
#ifdef SCTP_LOG_CLOSING
|
|
sctp_log_closing(inp, NULL, 11);
|
|
#endif
|
|
return (1);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* determine if a destination is "reachable" based upon the addresses bound
|
|
* to the current endpoint (e.g. only v4 or v6 currently bound)
|
|
*/
|
|
/*
|
|
* FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
|
|
* assoc level v4/v6 flags, as the assoc *may* not have the same address
|
|
* types bound as its endpoint
|
|
*/
|
|
int
|
|
sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
|
|
{
|
|
struct sctp_inpcb *inp;
|
|
int answer;
|
|
|
|
/*
|
|
* No locks here, the TCB, in all cases is already locked and an
|
|
* assoc is up. There is either a INP lock by the caller applied (in
|
|
* asconf case when deleting an address) or NOT in the HB case,
|
|
* however if HB then the INP increment is up and the INP will not
|
|
* be removed (on top of the fact that we have a TCB lock). So we
|
|
* only want to read the sctp_flags, which is either bound-all or
|
|
* not.. no protection needed since once an assoc is up you can't be
|
|
* changing your binding.
|
|
*/
|
|
inp = stcb->sctp_ep;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
|
|
/* if bound all, destination is not restricted */
|
|
/*
|
|
* RRS: Question during lock work: Is this correct? If you
|
|
* are bound-all you still might need to obey the V4--V6
|
|
* flags??? IMO this bound-all stuff needs to be removed!
|
|
*/
|
|
return (1);
|
|
}
|
|
/* NOTE: all "scope" checks are done when local addresses are added */
|
|
if (destaddr->sa_family == AF_INET6) {
|
|
answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
|
|
} else if (destaddr->sa_family == AF_INET) {
|
|
answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
|
|
} else {
|
|
/* invalid family, so it's unreachable */
|
|
answer = 0;
|
|
}
|
|
return (answer);
|
|
}
|
|
|
|
/*
|
|
* update the inp_vflags on an endpoint
|
|
*/
|
|
static void
|
|
sctp_update_ep_vflag(struct sctp_inpcb *inp)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
|
|
/* first clear the flag */
|
|
inp->ip_inp.inp.inp_vflag = 0;
|
|
/* set the flag based on addresses on the ep list */
|
|
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
|
|
if (laddr->ifa == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
|
|
__FUNCTION__);
|
|
continue;
|
|
}
|
|
if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
|
|
continue;
|
|
}
|
|
if (laddr->ifa->address.sa.sa_family == AF_INET6) {
|
|
inp->ip_inp.inp.inp_vflag |= INP_IPV6;
|
|
} else if (laddr->ifa->address.sa.sa_family == AF_INET) {
|
|
inp->ip_inp.inp.inp_vflag |= INP_IPV4;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add the address to the endpoint local address list There is nothing to be
|
|
* done if we are bound to all addresses
|
|
*/
|
|
void
|
|
sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
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;
|
|
}
|
|
if (ifa->address.sa.sa_family == AF_INET6) {
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
/* Can't bind a non-useable addr. */
|
|
return;
|
|
}
|
|
}
|
|
/* 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 */
|
|
if (ifa->address.sa.sa_family == AF_INET6) {
|
|
inp->ip_inp.inp.inp_vflag |= INP_IPV6;
|
|
} else if (ifa->address.sa.sa_family == AF_INET) {
|
|
inp->ip_inp.inp.inp_vflag |= INP_IPV4;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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 &&
|
|
(net->ro._s_addr->ifa == laddr->ifa)) {
|
|
/* Yep, purge src address selected */
|
|
sctp_rtentry_t *rt;
|
|
|
|
/* delete this address if cached */
|
|
rt = net->ro.ro_rt;
|
|
if (rt != NULL) {
|
|
RTFREE(rt);
|
|
net->ro.ro_rt = NULL;
|
|
}
|
|
sctp_free_ifa(net->ro._s_addr);
|
|
net->ro._s_addr = NULL;
|
|
net->src_addr_selected = 0;
|
|
}
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
} /* for each tcb */
|
|
/* remove it from the ep list */
|
|
sctp_remove_laddr(laddr);
|
|
inp->laddr_count--;
|
|
/* update inp_vflag flags */
|
|
sctp_update_ep_vflag(inp);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 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_inpcb *inp;
|
|
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;
|
|
|
|
inp = stcb->sctp_ep;
|
|
if (ifa->address.sa.sa_family == AF_INET6) {
|
|
if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
|
|
/* Can't bind a non-existent addr. */
|
|
return;
|
|
}
|
|
}
|
|
/* 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;
|
|
}
|
|
|
|
/*
|
|
* insert an laddr entry with the given ifa for the desired list
|
|
*/
|
|
int
|
|
sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
|
|
{
|
|
struct sctp_laddr *laddr;
|
|
|
|
laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr);
|
|
if (laddr == NULL) {
|
|
/* out of memory? */
|
|
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
|
|
return (EINVAL);
|
|
}
|
|
SCTP_INCR_LADDR_COUNT();
|
|
bzero(laddr, 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)
|
|
*/
|
|
void
|
|
sctp_remove_laddr(struct sctp_laddr *laddr)
|
|
{
|
|
|
|
/* remove from the list */
|
|
LIST_REMOVE(laddr, sctp_nxt_addr);
|
|
sctp_free_ifa(laddr->ifa);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr);
|
|
SCTP_DECR_LADDR_COUNT();
|
|
}
|
|
|
|
/*
|
|
* Remove 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;
|
|
}
|
|
|
|
static char sctp_pcb_initialized = 0;
|
|
|
|
/*
|
|
* Temporarily remove for __APPLE__ until we use the Tiger equivalents
|
|
*/
|
|
/* sysctl */
|
|
static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
|
|
static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
|
|
|
|
void
|
|
sctp_pcb_init()
|
|
{
|
|
/*
|
|
* SCTP initialization for the PCB structures should be called by
|
|
* the sctp_init() funciton.
|
|
*/
|
|
int i;
|
|
struct timeval tv;
|
|
|
|
if (sctp_pcb_initialized != 0) {
|
|
/* error I was called twice */
|
|
return;
|
|
}
|
|
sctp_pcb_initialized = 1;
|
|
|
|
bzero(&sctpstat, sizeof(struct sctpstat));
|
|
#if defined(SCTP_LOCAL_TRACE_BUF)
|
|
bzero(&sctp_log, sizeof(struct sctp_log));
|
|
#endif
|
|
(void)SCTP_GETTIME_TIMEVAL(&tv);
|
|
sctpstat.sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
|
|
sctpstat.sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
|
|
/* init the empty list of (All) Endpoints */
|
|
LIST_INIT(&sctppcbinfo.listhead);
|
|
|
|
/* init the iterator head */
|
|
TAILQ_INIT(&sctppcbinfo.iteratorhead);
|
|
|
|
/* init the hash table of endpoints */
|
|
TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize);
|
|
TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize);
|
|
TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale);
|
|
sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31),
|
|
&sctppcbinfo.hashasocmark);
|
|
sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize,
|
|
&sctppcbinfo.hashmark);
|
|
sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize,
|
|
&sctppcbinfo.hashtcpmark);
|
|
sctppcbinfo.hashtblsize = sctp_hashtblsize;
|
|
|
|
/* init the small hash table we use to track restarted asoc's */
|
|
sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE,
|
|
&sctppcbinfo.hashrestartmark);
|
|
|
|
|
|
sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
|
|
&sctppcbinfo.hashvrfmark);
|
|
|
|
sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
|
|
&sctppcbinfo.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(sctppcbinfo.ipi_zone_ep, "sctp_ep",
|
|
sizeof(struct sctp_inpcb), maxsockets);
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc",
|
|
sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr",
|
|
sizeof(struct sctp_laddr),
|
|
(sctp_max_number_of_assoc * sctp_scale_up_for_address));
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr",
|
|
sizeof(struct sctp_nets),
|
|
(sctp_max_number_of_assoc * sctp_scale_up_for_address));
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk",
|
|
sizeof(struct sctp_tmit_chunk),
|
|
(sctp_max_number_of_assoc * sctp_chunkscale));
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq",
|
|
sizeof(struct sctp_queued_to_read),
|
|
(sctp_max_number_of_assoc * sctp_chunkscale));
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out",
|
|
sizeof(struct sctp_stream_queue_pending),
|
|
(sctp_max_number_of_assoc * sctp_chunkscale));
|
|
|
|
SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asconf_ack, "sctp_asconf_ack",
|
|
sizeof(struct sctp_asconf_ack),
|
|
(sctp_max_number_of_assoc * sctp_chunkscale));
|
|
|
|
|
|
/* Master Lock INIT for info structure */
|
|
SCTP_INP_INFO_LOCK_INIT();
|
|
SCTP_STATLOG_INIT_LOCK();
|
|
SCTP_ITERATOR_LOCK_INIT();
|
|
|
|
SCTP_IPI_COUNT_INIT();
|
|
SCTP_IPI_ADDR_INIT();
|
|
SCTP_IPI_ITERATOR_WQ_INIT();
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
SCTP_IP_PKTLOG_INIT();
|
|
#endif
|
|
LIST_INIT(&sctppcbinfo.addr_wq);
|
|
|
|
/* not sure if we need all the counts */
|
|
sctppcbinfo.ipi_count_ep = 0;
|
|
/* assoc/tcb zone info */
|
|
sctppcbinfo.ipi_count_asoc = 0;
|
|
/* local addrlist zone info */
|
|
sctppcbinfo.ipi_count_laddr = 0;
|
|
/* remote addrlist zone info */
|
|
sctppcbinfo.ipi_count_raddr = 0;
|
|
/* chunk info */
|
|
sctppcbinfo.ipi_count_chunk = 0;
|
|
|
|
/* socket queue zone info */
|
|
sctppcbinfo.ipi_count_readq = 0;
|
|
|
|
/* stream out queue cont */
|
|
sctppcbinfo.ipi_count_strmoq = 0;
|
|
|
|
sctppcbinfo.ipi_free_strmoq = 0;
|
|
sctppcbinfo.ipi_free_chunks = 0;
|
|
|
|
SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer);
|
|
|
|
/* Init the TIMEWAIT list */
|
|
for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) {
|
|
LIST_INIT(&sctppcbinfo.vtag_timewait[i]);
|
|
}
|
|
|
|
#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
|
|
sctppcbinfo.iterator_running = 0;
|
|
sctp_startup_iterator();
|
|
#endif
|
|
|
|
/*
|
|
* INIT the default VRF which for BSD is the only one, other O/S's
|
|
* may have more. But initially they must start with one and then
|
|
* add the VRF's as addresses are added.
|
|
*/
|
|
sctp_init_vrf_list(SCTP_DEFAULT_VRF);
|
|
|
|
}
|
|
|
|
|
|
int
|
|
sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
|
|
int iphlen, int offset, int limit, struct sctphdr *sh,
|
|
struct sockaddr *altsa)
|
|
{
|
|
/*
|
|
* grub through the INIT pulling addresses and loading them to the
|
|
* nets structure in the asoc. The from address in the mbuf should
|
|
* also be loaded (if it is not already). This routine can be called
|
|
* with either INIT or INIT-ACK's as long as the m points to the IP
|
|
* packet and the offset points to the beginning of the parameters.
|
|
*/
|
|
struct sctp_inpcb *inp, *l_inp;
|
|
struct sctp_nets *net, *net_tmp;
|
|
struct ip *iph;
|
|
struct sctp_paramhdr *phdr, parm_buf;
|
|
struct sctp_tcb *stcb_tmp;
|
|
uint16_t ptype, plen;
|
|
struct sockaddr *sa;
|
|
struct sockaddr_storage dest_store;
|
|
struct sockaddr *local_sa = (struct sockaddr *)&dest_store;
|
|
struct sockaddr_in sin;
|
|
struct sockaddr_in6 sin6;
|
|
uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
|
|
struct sctp_auth_random *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;
|
|
|
|
/* First get the destination address setup too. */
|
|
memset(&sin, 0, sizeof(sin));
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_port = stcb->rport;
|
|
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6.sin6_port = stcb->rport;
|
|
if (altsa == NULL) {
|
|
iph = mtod(m, struct ip *);
|
|
if (iph->ip_v == IPVERSION) {
|
|
/* its IPv4 */
|
|
struct sockaddr_in *sin_2;
|
|
|
|
sin_2 = (struct sockaddr_in *)(local_sa);
|
|
memset(sin_2, 0, sizeof(sin));
|
|
sin_2->sin_family = AF_INET;
|
|
sin_2->sin_len = sizeof(sin);
|
|
sin_2->sin_port = sh->dest_port;
|
|
sin_2->sin_addr.s_addr = iph->ip_dst.s_addr;
|
|
sin.sin_addr = iph->ip_src;
|
|
sa = (struct sockaddr *)&sin;
|
|
} else if (iph->ip_v == (IPV6_VERSION >> 4)) {
|
|
/* its IPv6 */
|
|
struct ip6_hdr *ip6;
|
|
struct sockaddr_in6 *sin6_2;
|
|
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
sin6_2 = (struct sockaddr_in6 *)(local_sa);
|
|
memset(sin6_2, 0, sizeof(sin6));
|
|
sin6_2->sin6_family = AF_INET6;
|
|
sin6_2->sin6_len = sizeof(struct sockaddr_in6);
|
|
sin6_2->sin6_port = sh->dest_port;
|
|
sin6.sin6_addr = ip6->ip6_src;
|
|
sa = (struct sockaddr *)&sin6;
|
|
} else {
|
|
sa = NULL;
|
|
}
|
|
} else {
|
|
/*
|
|
* For cookies we use the src address NOT from the packet
|
|
* but from the original INIT
|
|
*/
|
|
sa = altsa;
|
|
}
|
|
/* Turn off ECN until we get through all params */
|
|
stcb->asoc.ecn_allowed = 0;
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
/* mark all addresses that we have currently on the list */
|
|
net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
|
|
}
|
|
/* does the source address already exist? if so skip it */
|
|
l_inp = inp = stcb->sctp_ep;
|
|
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
|
|
if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
|
|
/* we must add the source address */
|
|
/* no scope set here since we have a tcb already. */
|
|
if ((sa->sa_family == AF_INET) &&
|
|
(stcb->asoc.ipv4_addr_legal)) {
|
|
if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
|
|
return (-1);
|
|
}
|
|
} else if ((sa->sa_family == AF_INET6) &&
|
|
(stcb->asoc.ipv6_addr_legal)) {
|
|
if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
|
|
return (-2);
|
|
}
|
|
}
|
|
} else {
|
|
if (net_tmp != NULL && stcb_tmp == stcb) {
|
|
net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
|
|
} else if (stcb_tmp != stcb) {
|
|
/* It belongs to another association? */
|
|
if (stcb_tmp)
|
|
SCTP_TCB_UNLOCK(stcb_tmp);
|
|
return (-3);
|
|
}
|
|
}
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-4);
|
|
}
|
|
/*
|
|
* peer must explicitly turn this on. This may have been initialized
|
|
* to be "on" in order to allow local addr changes while INIT's are
|
|
* in flight.
|
|
*/
|
|
stcb->asoc.peer_supports_asconf = 0;
|
|
/* now we must go through each of the params. */
|
|
phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
|
|
while (phdr) {
|
|
ptype = ntohs(phdr->param_type);
|
|
plen = ntohs(phdr->param_length);
|
|
/*
|
|
* printf("ptype => %0x, plen => %d\n", (uint32_t)ptype,
|
|
* (int)plen);
|
|
*/
|
|
if (offset + plen > limit) {
|
|
break;
|
|
}
|
|
if (plen == 0) {
|
|
break;
|
|
}
|
|
if (ptype == SCTP_IPV4_ADDRESS) {
|
|
if (stcb->asoc.ipv4_addr_legal) {
|
|
struct sctp_ipv4addr_param *p4, p4_buf;
|
|
|
|
/* ok get the v4 address and check/add */
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf));
|
|
if (plen != sizeof(struct sctp_ipv4addr_param) ||
|
|
phdr == NULL) {
|
|
return (-5);
|
|
}
|
|
p4 = (struct sctp_ipv4addr_param *)phdr;
|
|
sin.sin_addr.s_addr = p4->addr;
|
|
if (IN_MULTICAST(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,
|
|
local_sa, stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
|
|
if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
|
|
inp == NULL) {
|
|
/* we must add the source address */
|
|
/*
|
|
* no scope set since we have a tcb
|
|
* already
|
|
*/
|
|
|
|
/*
|
|
* we must validate the state again
|
|
* here
|
|
*/
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-7);
|
|
}
|
|
if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
|
|
return (-8);
|
|
}
|
|
} else if (stcb_tmp == stcb) {
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-10);
|
|
}
|
|
if (net != NULL) {
|
|
/* clear flag */
|
|
net->dest_state &=
|
|
~SCTP_ADDR_NOT_IN_ASSOC;
|
|
}
|
|
} else {
|
|
/*
|
|
* strange, address is in another
|
|
* assoc? straighten out locks.
|
|
*/
|
|
if (stcb_tmp)
|
|
SCTP_TCB_UNLOCK(stcb_tmp);
|
|
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-12);
|
|
}
|
|
return (-13);
|
|
}
|
|
}
|
|
} else if (ptype == SCTP_IPV6_ADDRESS) {
|
|
if (stcb->asoc.ipv6_addr_legal) {
|
|
/* ok get the v6 address and check/add */
|
|
struct sctp_ipv6addr_param *p6, p6_buf;
|
|
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf));
|
|
if (plen != sizeof(struct sctp_ipv6addr_param) ||
|
|
phdr == NULL) {
|
|
return (-14);
|
|
}
|
|
p6 = (struct sctp_ipv6addr_param *)phdr;
|
|
memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
|
|
sizeof(p6->addr));
|
|
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,
|
|
local_sa, stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
if (stcb_tmp == NULL && (inp == stcb->sctp_ep ||
|
|
inp == NULL)) {
|
|
/*
|
|
* we must validate the state again
|
|
* here
|
|
*/
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-16);
|
|
}
|
|
/*
|
|
* we must add the address, no scope
|
|
* set
|
|
*/
|
|
if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
|
|
return (-17);
|
|
}
|
|
} else if (stcb_tmp == stcb) {
|
|
/*
|
|
* we must validate the state again
|
|
* here
|
|
*/
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-19);
|
|
}
|
|
if (net != NULL) {
|
|
/* clear flag */
|
|
net->dest_state &=
|
|
~SCTP_ADDR_NOT_IN_ASSOC;
|
|
}
|
|
} else {
|
|
/*
|
|
* strange, address is in another
|
|
* assoc? straighten out locks.
|
|
*/
|
|
if (stcb_tmp)
|
|
SCTP_TCB_UNLOCK(stcb_tmp);
|
|
|
|
if (stcb->asoc.state == 0) {
|
|
/* the assoc was freed? */
|
|
return (-21);
|
|
}
|
|
return (-22);
|
|
}
|
|
}
|
|
} else if (ptype == SCTP_ECN_CAPABLE) {
|
|
stcb->asoc.ecn_allowed = 1;
|
|
} else if (ptype == SCTP_ULP_ADAPTATION) {
|
|
if (stcb->asoc.state != SCTP_STATE_OPEN) {
|
|
struct sctp_adaptation_layer_indication ai,
|
|
*aip;
|
|
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&ai, sizeof(ai));
|
|
aip = (struct sctp_adaptation_layer_indication *)phdr;
|
|
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;
|
|
struct sctp_asconf_addrv4_param *fii;
|
|
int lptype;
|
|
struct sockaddr *lsa = NULL;
|
|
|
|
stcb->asoc.peer_supports_asconf = 1;
|
|
if (plen > sizeof(lstore)) {
|
|
return (-23);
|
|
}
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore)));
|
|
if (phdr == NULL) {
|
|
return (-24);
|
|
}
|
|
fee = (struct sctp_asconf_addr_param *)phdr;
|
|
lptype = ntohs(fee->addrp.ph.param_type);
|
|
if (lptype == SCTP_IPV4_ADDRESS) {
|
|
if (plen !=
|
|
sizeof(struct sctp_asconf_addrv4_param)) {
|
|
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;
|
|
}
|
|
} else if (lptype == 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;
|
|
}
|
|
}
|
|
if (lsa) {
|
|
(void)sctp_set_primary_addr(stcb, sa, NULL);
|
|
}
|
|
} else if (ptype == SCTP_PRSCTP_SUPPORTED) {
|
|
/* Peer supports pr-sctp */
|
|
stcb->asoc.peer_supports_prsctp = 1;
|
|
} else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
|
|
/* A supported extension chunk */
|
|
struct sctp_supported_chunk_types_param *pr_supported;
|
|
uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
|
|
int num_ent, i;
|
|
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
|
|
if (phdr == NULL) {
|
|
return (-25);
|
|
}
|
|
stcb->asoc.peer_supports_asconf = 0;
|
|
stcb->asoc.peer_supports_prsctp = 0;
|
|
stcb->asoc.peer_supports_pktdrop = 0;
|
|
stcb->asoc.peer_supports_strreset = 0;
|
|
stcb->asoc.peer_supports_auth = 0;
|
|
pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
|
|
num_ent = plen - sizeof(struct sctp_paramhdr);
|
|
for (i = 0; i < num_ent; i++) {
|
|
switch (pr_supported->chunk_types[i]) {
|
|
case SCTP_ASCONF:
|
|
case SCTP_ASCONF_ACK:
|
|
stcb->asoc.peer_supports_asconf = 1;
|
|
break;
|
|
case SCTP_FORWARD_CUM_TSN:
|
|
stcb->asoc.peer_supports_prsctp = 1;
|
|
break;
|
|
case SCTP_PACKET_DROPPED:
|
|
stcb->asoc.peer_supports_pktdrop = 1;
|
|
break;
|
|
case SCTP_STREAM_RESET:
|
|
stcb->asoc.peer_supports_strreset = 1;
|
|
break;
|
|
case SCTP_AUTHENTICATION:
|
|
stcb->asoc.peer_supports_auth = 1;
|
|
break;
|
|
default:
|
|
/* one I have not learned yet */
|
|
break;
|
|
|
|
}
|
|
}
|
|
} else if (ptype == SCTP_ECN_NONCE_SUPPORTED) {
|
|
/* Peer supports ECN-nonce */
|
|
stcb->asoc.peer_supports_ecn_nonce = 1;
|
|
stcb->asoc.ecn_nonce_allowed = 1;
|
|
} else if (ptype == SCTP_RANDOM) {
|
|
if (plen > sizeof(random_store))
|
|
break;
|
|
if (got_random) {
|
|
/* already processed a RANDOM */
|
|
goto next_param;
|
|
}
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)random_store,
|
|
min(sizeof(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) {
|
|
int num_hmacs;
|
|
int i;
|
|
|
|
if (plen > sizeof(hmacs_store))
|
|
break;
|
|
if (got_hmacs) {
|
|
/* already processed a HMAC list */
|
|
goto next_param;
|
|
}
|
|
phdr = sctp_get_next_param(m, offset,
|
|
(struct sctp_paramhdr *)hmacs_store,
|
|
min(plen, sizeof(hmacs_store)));
|
|
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,
|
|
min(plen, sizeof(chunks_store)));
|
|
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, &parm_buf,
|
|
sizeof(parm_buf));
|
|
}
|
|
/* Now check to see if we need to purge any addresses */
|
|
for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) {
|
|
net_tmp = TAILQ_NEXT(net, sctp_next);
|
|
if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
|
|
SCTP_ADDR_NOT_IN_ASSOC) {
|
|
/* This address has been removed from the asoc */
|
|
/* remove and free it */
|
|
stcb->asoc.numnets--;
|
|
TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
|
|
sctp_free_remote_addr(net);
|
|
if (net == stcb->asoc.primary_destination) {
|
|
stcb->asoc.primary_destination = NULL;
|
|
sctp_select_primary_destination(stcb);
|
|
}
|
|
}
|
|
}
|
|
/* validate authentication required parameters */
|
|
if (got_random && got_hmacs) {
|
|
stcb->asoc.peer_supports_auth = 1;
|
|
} else {
|
|
stcb->asoc.peer_supports_auth = 0;
|
|
}
|
|
if (!stcb->asoc.peer_supports_auth && got_chklist) {
|
|
/* peer does not support auth but sent a chunks list? */
|
|
return (-31);
|
|
}
|
|
if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf &&
|
|
!stcb->asoc.peer_supports_auth) {
|
|
/* peer supports asconf but not auth? */
|
|
return (-32);
|
|
} else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) &&
|
|
((saw_asconf == 0) || (saw_asconf_ack == 0))) {
|
|
return (-33);
|
|
}
|
|
/* concatenate the full random key */
|
|
#ifdef SCTP_AUTH_DRAFT_04
|
|
keylen = random_len;
|
|
new_key = sctp_alloc_key(keylen);
|
|
if (new_key != NULL) {
|
|
/* copy in the RANDOM */
|
|
if (p_random != NULL)
|
|
bcopy(p_random->random_data, new_key->key, random_len);
|
|
}
|
|
#else
|
|
keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks +
|
|
sizeof(*hmacs) + hmacs_len;
|
|
new_key = sctp_alloc_key(keylen);
|
|
if (new_key != NULL) {
|
|
/* copy in the RANDOM */
|
|
if (p_random != NULL) {
|
|
keylen = sizeof(*p_random) + random_len;
|
|
bcopy(p_random, new_key->key, keylen);
|
|
}
|
|
/* append in the AUTH chunks */
|
|
if (chunks != NULL) {
|
|
bcopy(chunks, new_key->key + keylen,
|
|
sizeof(*chunks) + num_chunks);
|
|
keylen += sizeof(*chunks) + num_chunks;
|
|
}
|
|
/* append in the HMACs */
|
|
if (hmacs != NULL) {
|
|
bcopy(hmacs, new_key->key + keylen,
|
|
sizeof(*hmacs) + hmacs_len);
|
|
}
|
|
}
|
|
#endif
|
|
else {
|
|
/* 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;
|
|
#ifdef SCTP_AUTH_DRAFT_04
|
|
/* don't include the chunks and hmacs for draft -04 */
|
|
stcb->asoc.authinfo.peer_random->keylen = random_len;
|
|
#endif
|
|
sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
|
|
sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
|
|
struct sctp_nets *net)
|
|
{
|
|
/* make sure the requested primary address exists in the assoc */
|
|
if (net == NULL && sa)
|
|
net = sctp_findnet(stcb, sa);
|
|
|
|
if (net == NULL) {
|
|
/* didn't find the requested primary address! */
|
|
return (-1);
|
|
} else {
|
|
/* set the primary address */
|
|
if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
|
|
/* Must be confirmed, so queue to set */
|
|
net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
|
|
return (0);
|
|
}
|
|
stcb->asoc.primary_destination = net;
|
|
net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY;
|
|
net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (net != stcb->asoc.primary_destination) {
|
|
/*
|
|
* first one on the list is NOT the primary
|
|
* sctp_cmpaddr() is much more efficent if the
|
|
* primary is the first on the list, make it so.
|
|
*/
|
|
TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
|
|
}
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
int
|
|
sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now, int save_in_twait)
|
|
{
|
|
/*
|
|
* This function serves two purposes. It will see if a TAG can be
|
|
* re-used and return 1 for yes it is ok and 0 for don't use that
|
|
* tag. A secondary function it will do is purge out old tags that
|
|
* can be removed.
|
|
*/
|
|
struct sctpasochead *head;
|
|
struct sctpvtaghead *chain;
|
|
struct sctp_tagblock *twait_block;
|
|
struct sctp_tcb *stcb;
|
|
int i;
|
|
|
|
SCTP_INP_INFO_WLOCK();
|
|
chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
|
|
/* First is the vtag in use ? */
|
|
|
|
head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag,
|
|
sctppcbinfo.hashasocmark)];
|
|
if (head == NULL) {
|
|
goto check_restart;
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_asocs) {
|
|
|
|
if (stcb->asoc.my_vtag == tag) {
|
|
/*
|
|
* We should remove this if and return 0 always if
|
|
* we want vtags unique across all endpoints. For
|
|
* now within a endpoint is ok.
|
|
*/
|
|
if (inp == stcb->sctp_ep) {
|
|
/* bad tag, in use */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
check_restart:
|
|
/* Now lets check the restart hash */
|
|
head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag,
|
|
sctppcbinfo.hashrestartmark)];
|
|
if (head == NULL) {
|
|
goto check_time_wait;
|
|
}
|
|
LIST_FOREACH(stcb, head, sctp_tcbrestarhash) {
|
|
if (stcb->asoc.assoc_id == tag) {
|
|
/* candidate */
|
|
if (inp == stcb->sctp_ep) {
|
|
/* bad tag, in use */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
check_time_wait:
|
|
/* Now what about timed wait ? */
|
|
if (!SCTP_LIST_EMPTY(chain)) {
|
|
/*
|
|
* Block(s) are present, lets see if we have this tag in the
|
|
* list
|
|
*/
|
|
LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
|
|
for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
|
|
if (twait_block->vtag_block[i].v_tag == 0) {
|
|
/* not used */
|
|
continue;
|
|
} else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
|
|
now->tv_sec) {
|
|
/* Audit expires this guy */
|
|
twait_block->vtag_block[i].tv_sec_at_expire = 0;
|
|
twait_block->vtag_block[i].v_tag = 0;
|
|
} else if (twait_block->vtag_block[i].v_tag ==
|
|
tag) {
|
|
/* Bad tag, sorry :< */
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*-
|
|
* Not found, ok to use the tag, add it to the time wait hash
|
|
* as well this will prevent two sucessive cookies from getting
|
|
* the same tag or two inits sent quickly on multi-processors.
|
|
* We only keep the tag for the life of a cookie and when we
|
|
* add this tag to the assoc hash we need to purge it from
|
|
* the t-wait hash.
|
|
*/
|
|
if (save_in_twait)
|
|
sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life));
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
return (1);
|
|
}
|
|
|
|
|
|
static sctp_assoc_t reneged_asoc_ids[256];
|
|
static uint8_t reneged_at = 0;
|
|
|
|
|
|
static void
|
|
sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
|
|
{
|
|
/*
|
|
* We must hunt this association for MBUF's past the cumack (i.e.
|
|
* out of order data that we can renege on).
|
|
*/
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk, *nchk;
|
|
uint32_t cumulative_tsn_p1, tsn;
|
|
struct sctp_queued_to_read *ctl, *nctl;
|
|
int cnt, strmat, gap;
|
|
|
|
/* We look for anything larger than the cum-ack + 1 */
|
|
|
|
SCTP_STAT_INCR(sctps_protocol_drain_calls);
|
|
if (sctp_do_drain == 0) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
|
|
/* none we can reneg on. */
|
|
return;
|
|
}
|
|
SCTP_STAT_INCR(sctps_protocol_drains_done);
|
|
cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
|
|
cnt = 0;
|
|
/* First look in the re-assembly queue */
|
|
chk = TAILQ_FIRST(&asoc->reasmqueue);
|
|
while (chk) {
|
|
/* Get the next one */
|
|
nchk = TAILQ_NEXT(chk, sctp_next);
|
|
if (compare_with_wrap(chk->rec.data.TSN_seq,
|
|
cumulative_tsn_p1, MAX_TSN)) {
|
|
/* Yep it is above cum-ack */
|
|
cnt++;
|
|
tsn = chk->rec.data.TSN_seq;
|
|
if (tsn >= asoc->mapping_array_base_tsn) {
|
|
gap = tsn - asoc->mapping_array_base_tsn;
|
|
} else {
|
|
gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
|
|
tsn + 1;
|
|
}
|
|
asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
|
|
sctp_ucount_decr(asoc->cnt_on_reasm_queue);
|
|
SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
|
|
TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
sctp_free_a_chunk(stcb, chk);
|
|
}
|
|
chk = nchk;
|
|
}
|
|
/* Ok that was fun, now we will drain all the inbound streams? */
|
|
for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
|
|
ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue);
|
|
while (ctl) {
|
|
nctl = TAILQ_NEXT(ctl, next);
|
|
if (compare_with_wrap(ctl->sinfo_tsn,
|
|
cumulative_tsn_p1, MAX_TSN)) {
|
|
/* Yep it is above cum-ack */
|
|
cnt++;
|
|
tsn = ctl->sinfo_tsn;
|
|
if (tsn >= asoc->mapping_array_base_tsn) {
|
|
gap = tsn -
|
|
asoc->mapping_array_base_tsn;
|
|
} else {
|
|
gap = (MAX_TSN -
|
|
asoc->mapping_array_base_tsn) +
|
|
tsn + 1;
|
|
}
|
|
asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
|
|
sctp_ucount_decr(asoc->cnt_on_all_streams);
|
|
|
|
SCTP_UNSET_TSN_PRESENT(asoc->mapping_array,
|
|
gap);
|
|
TAILQ_REMOVE(&asoc->strmin[strmat].inqueue,
|
|
ctl, next);
|
|
if (ctl->data) {
|
|
sctp_m_freem(ctl->data);
|
|
ctl->data = NULL;
|
|
}
|
|
sctp_free_remote_addr(ctl->whoFrom);
|
|
SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl);
|
|
SCTP_DECR_READQ_COUNT();
|
|
}
|
|
ctl = nctl;
|
|
}
|
|
}
|
|
/*
|
|
* Question, should we go through the delivery queue? The only
|
|
* reason things are on here is the app not reading OR a p-d-api up.
|
|
* An attacker COULD send enough in to initiate the PD-API and then
|
|
* send a bunch of stuff to other streams... these would wind up on
|
|
* the delivery queue.. and then we would not get to them. But in
|
|
* order to do this I then have to back-track and un-deliver
|
|
* sequence numbers in streams.. el-yucko. I think for now we will
|
|
* NOT look at the delivery queue and leave it to be something to
|
|
* consider later. An alternative would be to abort the P-D-API with
|
|
* a notification and then deliver the data.... Or another method
|
|
* might be to keep track of how many times the situation occurs and
|
|
* if we see a possible attack underway just abort the association.
|
|
*/
|
|
#ifdef SCTP_DEBUG
|
|
if (cnt) {
|
|
SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
|
|
}
|
|
#endif
|
|
if (cnt) {
|
|
/*
|
|
* Now do we need to find a new
|
|
* asoc->highest_tsn_inside_map?
|
|
*/
|
|
if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) {
|
|
gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn;
|
|
} else {
|
|
gap = (MAX_TSN - asoc->mapping_array_base_tsn) +
|
|
asoc->highest_tsn_inside_map + 1;
|
|
}
|
|
if (gap >= (asoc->mapping_array_size << 3)) {
|
|
/*
|
|
* Something bad happened or cum-ack and high were
|
|
* behind the base, but if so earlier checks should
|
|
* have found NO data... wierd... we will start at
|
|
* end of mapping array.
|
|
*/
|
|
SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n",
|
|
(int)gap,
|
|
(int)(asoc->mapping_array_size << 3),
|
|
(int)asoc->highest_tsn_inside_map);
|
|
gap = asoc->mapping_array_size << 3;
|
|
}
|
|
while (gap > 0) {
|
|
if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
|
|
/* found the new highest */
|
|
asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap;
|
|
break;
|
|
}
|
|
gap--;
|
|
}
|
|
if (gap == 0) {
|
|
/* Nothing left in map */
|
|
memset(asoc->mapping_array, 0, asoc->mapping_array_size);
|
|
asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1;
|
|
asoc->highest_tsn_inside_map = asoc->cumulative_tsn;
|
|
}
|
|
asoc->last_revoke_count = cnt;
|
|
(void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
|
|
/* sa_ignore NO_NULL_CHK */
|
|
sctp_send_sack(stcb);
|
|
sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
|
|
reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb);
|
|
reneged_at++;
|
|
}
|
|
/*
|
|
* Another issue, in un-setting the TSN's in the mapping array we
|
|
* DID NOT adjust the higest_tsn marker. This will cause one of two
|
|
* things to occur. It may cause us to do extra work in checking for
|
|
* our mapping array movement. More importantly it may cause us to
|
|
* SACK every datagram. This may not be a bad thing though since we
|
|
* will recover once we get our cum-ack above and all this stuff we
|
|
* dumped recovered.
|
|
*/
|
|
}
|
|
|
|
void
|
|
sctp_drain()
|
|
{
|
|
/*
|
|
* We must walk the PCB lists for ALL associations here. The system
|
|
* is LOW on MBUF's and needs help. This is where reneging will
|
|
* occur. We really hope this does NOT happen!
|
|
*/
|
|
struct sctp_inpcb *inp;
|
|
struct sctp_tcb *stcb;
|
|
|
|
SCTP_INP_INFO_RLOCK();
|
|
LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) {
|
|
/* For each endpoint */
|
|
SCTP_INP_RLOCK(inp);
|
|
LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
|
|
/* For each association */
|
|
SCTP_TCB_LOCK(stcb);
|
|
sctp_drain_mbufs(inp, stcb);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
SCTP_INP_RUNLOCK(inp);
|
|
}
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
}
|
|
|
|
/*
|
|
* start a new iterator
|
|
* iterates through all endpoints and associations based on the pcb_state
|
|
* flags and asoc_state. "af" (mandatory) is executed for all matching
|
|
* assocs and "ef" (optional) is executed when the iterator completes.
|
|
* "inpf" (optional) is executed for each new endpoint as it is being
|
|
* iterated through. 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);
|
|
}
|
|
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 (ENOMEM);
|
|
}
|
|
memset(it, 0, sizeof(*it));
|
|
it->function_assoc = af;
|
|
it->function_inp = inpf;
|
|
if (inpf)
|
|
it->done_current_ep = 0;
|
|
else
|
|
it->done_current_ep = 1;
|
|
it->function_atend = ef;
|
|
it->pointer = argp;
|
|
it->val = argi;
|
|
it->pcb_flags = pcb_state;
|
|
it->pcb_features = pcb_features;
|
|
it->asoc_state = asoc_state;
|
|
it->function_inp_end = inpe;
|
|
it->no_chunk_output = chunk_output_off;
|
|
if (s_inp) {
|
|
it->inp = s_inp;
|
|
it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
|
|
} else {
|
|
SCTP_INP_INFO_RLOCK();
|
|
it->inp = LIST_FIRST(&sctppcbinfo.listhead);
|
|
|
|
SCTP_INP_INFO_RUNLOCK();
|
|
it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
|
|
|
|
}
|
|
SCTP_IPI_ITERATOR_WQ_LOCK();
|
|
if (it->inp) {
|
|
SCTP_INP_INCR_REF(it->inp);
|
|
}
|
|
TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr);
|
|
#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
|
|
if (sctppcbinfo.iterator_running == 0) {
|
|
sctp_wakeup_iterator();
|
|
}
|
|
SCTP_IPI_ITERATOR_WQ_UNLOCK();
|
|
#else
|
|
if (it->inp)
|
|
SCTP_INP_DECR_REF(it->inp);
|
|
SCTP_IPI_ITERATOR_WQ_UNLOCK();
|
|
/* Init the timer */
|
|
SCTP_OS_TIMER_INIT(&it->tmr.timer);
|
|
/* add to the list of all iterators */
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it,
|
|
NULL, NULL);
|
|
#endif
|
|
/* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
|
|
return (0);
|
|
}
|