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4edd31fc71
containing an INIT chunk. MFC after: 3 days
6203 lines
190 KiB
C
6203 lines
190 KiB
C
/*-
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* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
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* Copyright (c) 2008-2012, by Michael Tuexen. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/sctp_os.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/sctp_header.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_input.h>
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#include <netinet/sctp_auth.h>
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#include <netinet/sctp_indata.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_bsd_addr.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctp_crc32.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/udp.h>
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#endif
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#include <sys/smp.h>
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static void
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sctp_stop_all_cookie_timers(struct sctp_tcb *stcb)
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{
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struct sctp_nets *net;
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/*
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* This now not only stops all cookie timers it also stops any INIT
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* timers as well. This will make sure that the timers are stopped
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* in all collision cases.
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*/
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SCTP_TCB_LOCK_ASSERT(stcb);
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TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
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if (net->rxt_timer.type == SCTP_TIMER_TYPE_COOKIE) {
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sctp_timer_stop(SCTP_TIMER_TYPE_COOKIE,
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stcb->sctp_ep,
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stcb,
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net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_1);
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} else if (net->rxt_timer.type == SCTP_TIMER_TYPE_INIT) {
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sctp_timer_stop(SCTP_TIMER_TYPE_INIT,
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stcb->sctp_ep,
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stcb,
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net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_2);
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}
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}
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}
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/* INIT handler */
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static void
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sctp_handle_init(struct mbuf *m, int iphlen, int offset,
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struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
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struct sctp_init_chunk *cp, struct sctp_inpcb *inp,
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struct sctp_tcb *stcb, int *abort_no_unlock,
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uint8_t mflowtype, uint32_t mflowid,
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uint32_t vrf_id, uint16_t port)
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{
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struct sctp_init *init;
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struct mbuf *op_err;
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SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_init: handling INIT tcb:%p\n",
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(void *)stcb);
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if (stcb == NULL) {
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SCTP_INP_RLOCK(inp);
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}
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/* validate length */
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if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_chunk)) {
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op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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/* validate parameters */
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init = &cp->init;
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if (init->initiate_tag == 0) {
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/* protocol error... send abort */
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op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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if (ntohl(init->a_rwnd) < SCTP_MIN_RWND) {
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/* invalid parameter... send abort */
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op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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if (init->num_inbound_streams == 0) {
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/* protocol error... send abort */
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op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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if (init->num_outbound_streams == 0) {
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/* protocol error... send abort */
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op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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if (sctp_validate_init_auth_params(m, offset + sizeof(*cp),
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offset + ntohs(cp->ch.chunk_length))) {
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/* auth parameter(s) error... send abort */
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op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
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"Problem with AUTH parameters");
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sctp_abort_association(inp, stcb, m, iphlen, src, dst, sh, op_err,
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mflowtype, mflowid,
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vrf_id, port);
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if (stcb)
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*abort_no_unlock = 1;
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goto outnow;
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}
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/*
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* We are only accepting if we have a socket with positive
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* so_qlimit.
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*/
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if ((stcb == NULL) &&
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((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
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(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
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(inp->sctp_socket == NULL) ||
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(inp->sctp_socket->so_qlimit == 0))) {
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/*
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* FIX ME ?? What about TCP model and we have a
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* match/restart case? Actually no fix is needed. the lookup
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* will always find the existing assoc so stcb would not be
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* NULL. It may be questionable to do this since we COULD
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* just send back the INIT-ACK and hope that the app did
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* accept()'s by the time the COOKIE was sent. But there is
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* a price to pay for COOKIE generation and I don't want to
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* pay it on the chance that the app will actually do some
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* accepts(). The App just looses and should NOT be in this
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* state :-)
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*/
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if (SCTP_BASE_SYSCTL(sctp_blackhole) == 0) {
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op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
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"No listener");
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sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
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mflowtype, mflowid, inp->fibnum,
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vrf_id, port);
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}
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goto outnow;
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}
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if ((stcb != NULL) &&
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(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT)) {
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SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending SHUTDOWN-ACK\n");
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sctp_send_shutdown_ack(stcb, NULL);
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sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
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} else {
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SCTPDBG(SCTP_DEBUG_INPUT3, "sctp_handle_init: sending INIT-ACK\n");
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sctp_send_initiate_ack(inp, stcb, m, iphlen, offset, src, dst,
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sh, cp,
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mflowtype, mflowid,
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vrf_id, port,
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((stcb == NULL) ? SCTP_HOLDS_LOCK : SCTP_NOT_LOCKED));
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}
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outnow:
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if (stcb == NULL) {
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SCTP_INP_RUNLOCK(inp);
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}
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}
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/*
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* process peer "INIT/INIT-ACK" chunk returns value < 0 on error
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*/
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int
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sctp_is_there_unsent_data(struct sctp_tcb *stcb, int so_locked
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#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
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SCTP_UNUSED
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#endif
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)
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{
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int unsent_data = 0;
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unsigned int i;
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struct sctp_stream_queue_pending *sp;
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struct sctp_association *asoc;
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/*
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* This function returns the number of streams that have true unsent
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* data on them. Note that as it looks through it will clean up any
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* places that have old data that has been sent but left at top of
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* stream queue.
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*/
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asoc = &stcb->asoc;
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SCTP_TCB_SEND_LOCK(stcb);
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if (!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
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/* Check to see if some data queued */
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for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
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/* sa_ignore FREED_MEMORY */
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sp = TAILQ_FIRST(&stcb->asoc.strmout[i].outqueue);
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if (sp == NULL) {
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continue;
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}
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if ((sp->msg_is_complete) &&
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(sp->length == 0) &&
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(sp->sender_all_done)) {
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/*
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* We are doing differed cleanup. Last time
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* through when we took all the data the
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* sender_all_done was not set.
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*/
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if (sp->put_last_out == 0) {
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SCTP_PRINTF("Gak, put out entire msg with NO end!-1\n");
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SCTP_PRINTF("sender_done:%d len:%d msg_comp:%d put_last_out:%d\n",
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sp->sender_all_done,
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sp->length,
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sp->msg_is_complete,
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sp->put_last_out);
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}
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atomic_subtract_int(&stcb->asoc.stream_queue_cnt, 1);
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TAILQ_REMOVE(&stcb->asoc.strmout[i].outqueue, sp, next);
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if (sp->net) {
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sctp_free_remote_addr(sp->net);
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sp->net = NULL;
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}
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if (sp->data) {
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sctp_m_freem(sp->data);
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sp->data = NULL;
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}
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sctp_free_a_strmoq(stcb, sp, so_locked);
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} else {
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unsent_data++;
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break;
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}
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}
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}
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SCTP_TCB_SEND_UNLOCK(stcb);
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return (unsent_data);
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}
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static int
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sctp_process_init(struct sctp_init_chunk *cp, struct sctp_tcb *stcb)
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{
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struct sctp_init *init;
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struct sctp_association *asoc;
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struct sctp_nets *lnet;
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unsigned int i;
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init = &cp->init;
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asoc = &stcb->asoc;
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/* save off parameters */
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asoc->peer_vtag = ntohl(init->initiate_tag);
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asoc->peers_rwnd = ntohl(init->a_rwnd);
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/* init tsn's */
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asoc->highest_tsn_inside_map = asoc->asconf_seq_in = ntohl(init->initial_tsn) - 1;
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if (!TAILQ_EMPTY(&asoc->nets)) {
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/* update any ssthresh's that may have a default */
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TAILQ_FOREACH(lnet, &asoc->nets, sctp_next) {
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lnet->ssthresh = asoc->peers_rwnd;
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if (SCTP_BASE_SYSCTL(sctp_logging_level) & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) {
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sctp_log_cwnd(stcb, lnet, 0, SCTP_CWND_INITIALIZATION);
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}
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}
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}
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SCTP_TCB_SEND_LOCK(stcb);
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if (asoc->pre_open_streams > ntohs(init->num_inbound_streams)) {
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unsigned int newcnt;
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struct sctp_stream_out *outs;
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struct sctp_stream_queue_pending *sp, *nsp;
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struct sctp_tmit_chunk *chk, *nchk;
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/* abandon the upper streams */
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newcnt = ntohs(init->num_inbound_streams);
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TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
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if (chk->rec.data.stream_number >= newcnt) {
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TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
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asoc->send_queue_cnt--;
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if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
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asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
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#ifdef INVARIANTS
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} else {
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panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
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#endif
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}
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if (chk->data != NULL) {
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sctp_free_bufspace(stcb, asoc, chk, 1);
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sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
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0, chk, SCTP_SO_NOT_LOCKED);
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if (chk->data) {
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sctp_m_freem(chk->data);
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chk->data = NULL;
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}
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}
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sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
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/* sa_ignore FREED_MEMORY */
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}
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}
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if (asoc->strmout) {
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for (i = newcnt; i < asoc->pre_open_streams; i++) {
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outs = &asoc->strmout[i];
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TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
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TAILQ_REMOVE(&outs->outqueue, sp, next);
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asoc->stream_queue_cnt--;
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sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL,
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stcb, 0, sp, SCTP_SO_NOT_LOCKED);
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if (sp->data) {
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sctp_m_freem(sp->data);
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sp->data = NULL;
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}
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if (sp->net) {
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sctp_free_remote_addr(sp->net);
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sp->net = NULL;
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}
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/* Free the chunk */
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sctp_free_a_strmoq(stcb, sp, SCTP_SO_NOT_LOCKED);
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/* sa_ignore FREED_MEMORY */
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}
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outs->state = SCTP_STREAM_CLOSED;
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}
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}
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/* cut back the count */
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asoc->pre_open_streams = newcnt;
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}
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SCTP_TCB_SEND_UNLOCK(stcb);
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asoc->streamoutcnt = asoc->pre_open_streams;
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for (i = 0; i < asoc->streamoutcnt; i++) {
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asoc->strmout[i].state = SCTP_STREAM_OPEN;
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}
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/* EY - nr_sack: initialize highest tsn in nr_mapping_array */
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asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
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if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
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sctp_log_map(0, 5, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
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}
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/* This is the next one we expect */
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asoc->str_reset_seq_in = asoc->asconf_seq_in + 1;
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asoc->mapping_array_base_tsn = ntohl(init->initial_tsn);
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asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->asconf_seq_in;
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asoc->advanced_peer_ack_point = asoc->last_acked_seq;
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/* open the requested streams */
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|
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if (asoc->strmin != NULL) {
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/* Free the old ones */
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struct sctp_queued_to_read *ctl, *nctl;
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for (i = 0; i < asoc->streamincnt; i++) {
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TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
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TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
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sctp_free_remote_addr(ctl->whoFrom);
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ctl->whoFrom = NULL;
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sctp_m_freem(ctl->data);
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ctl->data = NULL;
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sctp_free_a_readq(stcb, ctl);
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}
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}
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SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
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}
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if (asoc->max_inbound_streams > ntohs(init->num_outbound_streams)) {
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asoc->streamincnt = ntohs(init->num_outbound_streams);
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} else {
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asoc->streamincnt = asoc->max_inbound_streams;
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}
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SCTP_MALLOC(asoc->strmin, struct sctp_stream_in *, asoc->streamincnt *
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sizeof(struct sctp_stream_in), SCTP_M_STRMI);
|
|
if (asoc->strmin == NULL) {
|
|
/* we didn't get memory for the streams! */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "process_init: couldn't get memory for the streams!\n");
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|
return (-1);
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}
|
|
for (i = 0; i < asoc->streamincnt; i++) {
|
|
asoc->strmin[i].stream_no = i;
|
|
asoc->strmin[i].last_sequence_delivered = 0xffff;
|
|
TAILQ_INIT(&asoc->strmin[i].inqueue);
|
|
asoc->strmin[i].delivery_started = 0;
|
|
}
|
|
/*
|
|
* load_address_from_init will put the addresses into the
|
|
* association when the COOKIE is processed or the INIT-ACK is
|
|
* processed. Both types of COOKIE's existing and new call this
|
|
* routine. It will remove addresses that are no longer in the
|
|
* association (for the restarting case where addresses are
|
|
* removed). Up front when the INIT arrives we will discard it if it
|
|
* is a restart and new addresses have been added.
|
|
*/
|
|
/* sa_ignore MEMLEAK */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* INIT-ACK message processing/consumption returns value < 0 on error
|
|
*/
|
|
static int
|
|
sctp_process_init_ack(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
|
|
struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
|
|
struct sctp_nets *net, int *abort_no_unlock,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct mbuf *op_err;
|
|
int retval, abort_flag;
|
|
uint32_t initack_limit;
|
|
int nat_friendly = 0;
|
|
|
|
/* First verify that we have no illegal param's */
|
|
abort_flag = 0;
|
|
|
|
op_err = sctp_arethere_unrecognized_parameters(m,
|
|
(offset + sizeof(struct sctp_init_chunk)),
|
|
&abort_flag, (struct sctp_chunkhdr *)cp, &nat_friendly);
|
|
if (abort_flag) {
|
|
/* Send an abort and notify peer */
|
|
sctp_abort_an_association(stcb->sctp_ep, stcb, op_err, SCTP_SO_NOT_LOCKED);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
asoc = &stcb->asoc;
|
|
asoc->peer_supports_nat = (uint8_t) nat_friendly;
|
|
/* process the peer's parameters in the INIT-ACK */
|
|
retval = sctp_process_init((struct sctp_init_chunk *)cp, stcb);
|
|
if (retval < 0) {
|
|
return (retval);
|
|
}
|
|
initack_limit = offset + ntohs(cp->ch.chunk_length);
|
|
/* load all addresses */
|
|
if ((retval = sctp_load_addresses_from_init(stcb, m,
|
|
(offset + sizeof(struct sctp_init_chunk)), initack_limit,
|
|
src, dst, NULL))) {
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
"Problem with address parameters");
|
|
SCTPDBG(SCTP_DEBUG_INPUT1,
|
|
"Load addresses from INIT causes an abort %d\n",
|
|
retval);
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
/* if the peer doesn't support asconf, flush the asconf queue */
|
|
if (asoc->asconf_supported == 0) {
|
|
struct sctp_asconf_addr *param, *nparam;
|
|
|
|
TAILQ_FOREACH_SAFE(param, &asoc->asconf_queue, next, nparam) {
|
|
TAILQ_REMOVE(&asoc->asconf_queue, param, next);
|
|
SCTP_FREE(param, SCTP_M_ASC_ADDR);
|
|
}
|
|
}
|
|
stcb->asoc.peer_hmac_id = sctp_negotiate_hmacid(stcb->asoc.peer_hmacs,
|
|
stcb->asoc.local_hmacs);
|
|
if (op_err) {
|
|
sctp_queue_op_err(stcb, op_err);
|
|
/* queuing will steal away the mbuf chain to the out queue */
|
|
op_err = NULL;
|
|
}
|
|
/* extract the cookie and queue it to "echo" it back... */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
net->error_count = 0;
|
|
|
|
/*
|
|
* Cancel the INIT timer, We do this first before queueing the
|
|
* cookie. We always cancel at the primary to assue that we are
|
|
* canceling the timer started by the INIT which always goes to the
|
|
* primary.
|
|
*/
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep, stcb,
|
|
asoc->primary_destination, SCTP_FROM_SCTP_INPUT + SCTP_LOC_3);
|
|
|
|
/* calculate the RTO */
|
|
net->RTO = sctp_calculate_rto(stcb, asoc, net, &asoc->time_entered, sctp_align_safe_nocopy,
|
|
SCTP_RTT_FROM_NON_DATA);
|
|
retval = sctp_send_cookie_echo(m, offset, stcb, net);
|
|
if (retval < 0) {
|
|
/*
|
|
* No cookie, we probably should send a op error. But in any
|
|
* case if there is no cookie in the INIT-ACK, we can
|
|
* abandon the peer, its broke.
|
|
*/
|
|
if (retval == -3) {
|
|
uint16_t len;
|
|
|
|
len = (uint16_t) (sizeof(struct sctp_error_missing_param) + sizeof(uint16_t));
|
|
/* We abort with an error of missing mandatory param */
|
|
op_err = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err != NULL) {
|
|
struct sctp_error_missing_param *cause;
|
|
|
|
SCTP_BUF_LEN(op_err) = len;
|
|
cause = mtod(op_err, struct sctp_error_missing_param *);
|
|
/* Subtract the reserved param */
|
|
cause->cause.code = htons(SCTP_CAUSE_MISSING_PARAM);
|
|
cause->cause.length = htons(len);
|
|
cause->num_missing_params = htonl(1);
|
|
cause->type[0] = htons(SCTP_STATE_COOKIE);
|
|
}
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
}
|
|
return (retval);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sctp_handle_heartbeat_ack(struct sctp_heartbeat_chunk *cp,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
union sctp_sockstore store;
|
|
struct sctp_nets *r_net, *f_net;
|
|
struct timeval tv;
|
|
int req_prim = 0;
|
|
uint16_t old_error_counter;
|
|
|
|
if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_heartbeat_chunk)) {
|
|
/* Invalid length */
|
|
return;
|
|
}
|
|
memset(&store, 0, sizeof(store));
|
|
switch (cp->heartbeat.hb_info.addr_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in)) {
|
|
store.sin.sin_family = cp->heartbeat.hb_info.addr_family;
|
|
store.sin.sin_len = cp->heartbeat.hb_info.addr_len;
|
|
store.sin.sin_port = stcb->rport;
|
|
memcpy(&store.sin.sin_addr, cp->heartbeat.hb_info.address,
|
|
sizeof(store.sin.sin_addr));
|
|
} else {
|
|
return;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (cp->heartbeat.hb_info.addr_len == sizeof(struct sockaddr_in6)) {
|
|
store.sin6.sin6_family = cp->heartbeat.hb_info.addr_family;
|
|
store.sin6.sin6_len = cp->heartbeat.hb_info.addr_len;
|
|
store.sin6.sin6_port = stcb->rport;
|
|
memcpy(&store.sin6.sin6_addr, cp->heartbeat.hb_info.address, sizeof(struct in6_addr));
|
|
} else {
|
|
return;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
return;
|
|
}
|
|
r_net = sctp_findnet(stcb, &store.sa);
|
|
if (r_net == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Huh? I can't find the address I sent it to, discard\n");
|
|
return;
|
|
}
|
|
if ((r_net && (r_net->dest_state & SCTP_ADDR_UNCONFIRMED)) &&
|
|
(r_net->heartbeat_random1 == cp->heartbeat.hb_info.random_value1) &&
|
|
(r_net->heartbeat_random2 == cp->heartbeat.hb_info.random_value2)) {
|
|
/*
|
|
* If the its a HB and it's random value is correct when can
|
|
* confirm the destination.
|
|
*/
|
|
r_net->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
if (r_net->dest_state & SCTP_ADDR_REQ_PRIMARY) {
|
|
stcb->asoc.primary_destination = r_net;
|
|
r_net->dest_state &= ~SCTP_ADDR_REQ_PRIMARY;
|
|
f_net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (f_net != r_net) {
|
|
/*
|
|
* 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, r_net, sctp_next);
|
|
TAILQ_INSERT_HEAD(&stcb->asoc.nets, r_net, sctp_next);
|
|
}
|
|
req_prim = 1;
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
|
|
stcb, 0, (void *)r_net, SCTP_SO_NOT_LOCKED);
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb,
|
|
r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_4);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
|
|
}
|
|
old_error_counter = r_net->error_count;
|
|
r_net->error_count = 0;
|
|
r_net->hb_responded = 1;
|
|
tv.tv_sec = cp->heartbeat.hb_info.time_value_1;
|
|
tv.tv_usec = cp->heartbeat.hb_info.time_value_2;
|
|
/* Now lets do a RTO with this */
|
|
r_net->RTO = sctp_calculate_rto(stcb, &stcb->asoc, r_net, &tv, sctp_align_safe_nocopy,
|
|
SCTP_RTT_FROM_NON_DATA);
|
|
if (!(r_net->dest_state & SCTP_ADDR_REACHABLE)) {
|
|
r_net->dest_state |= SCTP_ADDR_REACHABLE;
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_UP, stcb,
|
|
0, (void *)r_net, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (r_net->dest_state & SCTP_ADDR_PF) {
|
|
r_net->dest_state &= ~SCTP_ADDR_PF;
|
|
stcb->asoc.cc_functions.sctp_cwnd_update_exit_pf(stcb, net);
|
|
}
|
|
if (old_error_counter > 0) {
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
|
|
stcb, r_net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_5);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, r_net);
|
|
}
|
|
if (r_net == stcb->asoc.primary_destination) {
|
|
if (stcb->asoc.alternate) {
|
|
/* release the alternate, primary is good */
|
|
sctp_free_remote_addr(stcb->asoc.alternate);
|
|
stcb->asoc.alternate = NULL;
|
|
}
|
|
}
|
|
/* Mobility adaptation */
|
|
if (req_prim) {
|
|
if ((sctp_is_mobility_feature_on(stcb->sctp_ep,
|
|
SCTP_MOBILITY_BASE) ||
|
|
sctp_is_mobility_feature_on(stcb->sctp_ep,
|
|
SCTP_MOBILITY_FASTHANDOFF)) &&
|
|
sctp_is_mobility_feature_on(stcb->sctp_ep,
|
|
SCTP_MOBILITY_PRIM_DELETED)) {
|
|
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_PRIM_DELETED,
|
|
stcb->sctp_ep, stcb, NULL,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_6);
|
|
if (sctp_is_mobility_feature_on(stcb->sctp_ep,
|
|
SCTP_MOBILITY_FASTHANDOFF)) {
|
|
sctp_assoc_immediate_retrans(stcb,
|
|
stcb->asoc.primary_destination);
|
|
}
|
|
if (sctp_is_mobility_feature_on(stcb->sctp_ep,
|
|
SCTP_MOBILITY_BASE)) {
|
|
sctp_move_chunks_from_net(stcb,
|
|
stcb->asoc.deleted_primary);
|
|
}
|
|
sctp_delete_prim_timer(stcb->sctp_ep, stcb,
|
|
stcb->asoc.deleted_primary);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_handle_nat_colliding_state(struct sctp_tcb *stcb)
|
|
{
|
|
/*
|
|
* return 0 means we want you to proceed with the abort non-zero
|
|
* means no abort processing
|
|
*/
|
|
struct sctpasochead *head;
|
|
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
|
|
/* generate a new vtag and send init */
|
|
LIST_REMOVE(stcb, sctp_asocs);
|
|
stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
|
|
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
|
|
/*
|
|
* put it in the bucket in the vtag hash of assoc's for the
|
|
* system
|
|
*/
|
|
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
|
|
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
|
|
return (1);
|
|
}
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED) {
|
|
/*
|
|
* treat like a case where the cookie expired i.e.: - dump
|
|
* current cookie. - generate a new vtag. - resend init.
|
|
*/
|
|
/* generate a new vtag and send init */
|
|
LIST_REMOVE(stcb, sctp_asocs);
|
|
stcb->asoc.state &= ~SCTP_STATE_COOKIE_ECHOED;
|
|
stcb->asoc.state |= SCTP_STATE_COOKIE_WAIT;
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
sctp_toss_old_cookies(stcb, &stcb->asoc);
|
|
stcb->asoc.my_vtag = sctp_select_a_tag(stcb->sctp_ep, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
|
|
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
|
|
/*
|
|
* put it in the bucket in the vtag hash of assoc's for the
|
|
* system
|
|
*/
|
|
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
|
|
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sctp_handle_nat_missing_state(struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
/*
|
|
* return 0 means we want you to proceed with the abort non-zero
|
|
* means no abort processing
|
|
*/
|
|
if (stcb->asoc.auth_supported == 0) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_nat_missing_state: Peer does not support AUTH, cannot send an asconf\n");
|
|
return (0);
|
|
}
|
|
sctp_asconf_send_nat_state_update(stcb, net);
|
|
return (1);
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_handle_abort(struct sctp_abort_chunk *abort,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
uint16_t len;
|
|
uint16_t error;
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: handling ABORT\n");
|
|
if (stcb == NULL)
|
|
return;
|
|
|
|
len = ntohs(abort->ch.chunk_length);
|
|
if (len > sizeof(struct sctp_chunkhdr)) {
|
|
/*
|
|
* Need to check the cause codes for our two magic nat
|
|
* aborts which don't kill the assoc necessarily.
|
|
*/
|
|
struct sctp_gen_error_cause *cause;
|
|
|
|
cause = (struct sctp_gen_error_cause *)(abort + 1);
|
|
error = ntohs(cause->code);
|
|
if (error == SCTP_CAUSE_NAT_COLLIDING_STATE) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
|
|
abort->ch.chunk_flags);
|
|
if (sctp_handle_nat_colliding_state(stcb)) {
|
|
return;
|
|
}
|
|
} else if (error == SCTP_CAUSE_NAT_MISSING_STATE) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
|
|
abort->ch.chunk_flags);
|
|
if (sctp_handle_nat_missing_state(stcb, net)) {
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
error = 0;
|
|
}
|
|
/* stop any receive timers */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_7);
|
|
/* notify user of the abort and clean up... */
|
|
sctp_abort_notification(stcb, 1, error, abort, SCTP_SO_NOT_LOCKED);
|
|
/* free the tcb */
|
|
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
|
|
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
#ifdef SCTP_ASOCLOG_OF_TSNS
|
|
sctp_print_out_track_log(stcb);
|
|
#endif
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
|
|
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_8);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_abort: finished\n");
|
|
}
|
|
|
|
static void
|
|
sctp_start_net_timers(struct sctp_tcb *stcb)
|
|
{
|
|
uint32_t cnt_hb_sent;
|
|
struct sctp_nets *net;
|
|
|
|
cnt_hb_sent = 0;
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
/*
|
|
* For each network start: 1) A pmtu timer. 2) A HB timer 3)
|
|
* If the dest in unconfirmed send a hb as well if under
|
|
* max_hb_burst have been sent.
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, net);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep, stcb, net);
|
|
if ((net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
|
|
(cnt_hb_sent < SCTP_BASE_SYSCTL(sctp_hb_maxburst))) {
|
|
sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
|
|
cnt_hb_sent++;
|
|
}
|
|
}
|
|
if (cnt_hb_sent) {
|
|
sctp_chunk_output(stcb->sctp_ep, stcb,
|
|
SCTP_OUTPUT_FROM_COOKIE_ACK,
|
|
SCTP_SO_NOT_LOCKED);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
sctp_handle_shutdown(struct sctp_shutdown_chunk *cp,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net, int *abort_flag)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int some_on_streamwheel;
|
|
int old_state;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_shutdown: handling SHUTDOWN\n");
|
|
if (stcb == NULL)
|
|
return;
|
|
asoc = &stcb->asoc;
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
return;
|
|
}
|
|
if (ntohs(cp->ch.chunk_length) != sizeof(struct sctp_shutdown_chunk)) {
|
|
/* Shutdown NOT the expected size */
|
|
return;
|
|
}
|
|
old_state = SCTP_GET_STATE(asoc);
|
|
sctp_update_acked(stcb, cp, abort_flag);
|
|
if (*abort_flag) {
|
|
return;
|
|
}
|
|
if (asoc->control_pdapi) {
|
|
/*
|
|
* With a normal shutdown we assume the end of last record.
|
|
*/
|
|
SCTP_INP_READ_LOCK(stcb->sctp_ep);
|
|
asoc->control_pdapi->end_added = 1;
|
|
asoc->control_pdapi->pdapi_aborted = 1;
|
|
asoc->control_pdapi = NULL;
|
|
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
/* assoc was freed while we were unlocked */
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
return;
|
|
}
|
|
#endif
|
|
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
/* goto SHUTDOWN_RECEIVED state to block new requests */
|
|
if (stcb->sctp_socket) {
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_RECEIVED);
|
|
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
|
|
/*
|
|
* notify upper layer that peer has initiated a
|
|
* shutdown
|
|
*/
|
|
sctp_ulp_notify(SCTP_NOTIFY_PEER_SHUTDOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
|
|
/* reset time */
|
|
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
|
|
}
|
|
}
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_SENT) {
|
|
/*
|
|
* stop the shutdown timer, since we WILL move to
|
|
* SHUTDOWN-ACK-SENT.
|
|
*/
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb,
|
|
net, SCTP_FROM_SCTP_INPUT + SCTP_LOC_9);
|
|
}
|
|
/* Now is there unsent data on a stream somewhere? */
|
|
some_on_streamwheel = sctp_is_there_unsent_data(stcb, SCTP_SO_NOT_LOCKED);
|
|
|
|
if (!TAILQ_EMPTY(&asoc->send_queue) ||
|
|
!TAILQ_EMPTY(&asoc->sent_queue) ||
|
|
some_on_streamwheel) {
|
|
/* By returning we will push more data out */
|
|
return;
|
|
} else {
|
|
/* no outstanding data to send, so move on... */
|
|
/* send SHUTDOWN-ACK */
|
|
/* move to SHUTDOWN-ACK-SENT state */
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
|
|
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
|
|
}
|
|
SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING);
|
|
if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_ACK_SENT);
|
|
sctp_stop_timers_for_shutdown(stcb);
|
|
sctp_send_shutdown_ack(stcb, net);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNACK,
|
|
stcb->sctp_ep, stcb, net);
|
|
} else if (old_state == SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
sctp_send_shutdown_ack(stcb, net);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_handle_shutdown_ack(struct sctp_shutdown_ack_chunk *cp SCTP_UNUSED,
|
|
struct sctp_tcb *stcb,
|
|
struct sctp_nets *net)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
#endif
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_shutdown_ack: handling SHUTDOWN ACK\n");
|
|
if (stcb == NULL)
|
|
return;
|
|
|
|
asoc = &stcb->asoc;
|
|
/* process according to association state */
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) ||
|
|
(SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* unexpected SHUTDOWN-ACK... do OOTB handling... */
|
|
sctp_send_shutdown_complete(stcb, net, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return;
|
|
}
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
|
|
/* unexpected SHUTDOWN-ACK... so ignore... */
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return;
|
|
}
|
|
if (asoc->control_pdapi) {
|
|
/*
|
|
* With a normal shutdown we assume the end of last record.
|
|
*/
|
|
SCTP_INP_READ_LOCK(stcb->sctp_ep);
|
|
asoc->control_pdapi->end_added = 1;
|
|
asoc->control_pdapi->pdapi_aborted = 1;
|
|
asoc->control_pdapi = NULL;
|
|
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
/* assoc was freed while we were unlocked */
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
return;
|
|
}
|
|
#endif
|
|
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
#ifdef INVARIANTS
|
|
if (!TAILQ_EMPTY(&asoc->send_queue) ||
|
|
!TAILQ_EMPTY(&asoc->sent_queue) ||
|
|
!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
|
|
panic("Queues are not empty when handling SHUTDOWN-ACK");
|
|
}
|
|
#endif
|
|
/* stop the timer */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWN, stcb->sctp_ep, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_10);
|
|
/* send SHUTDOWN-COMPLETE */
|
|
sctp_send_shutdown_complete(stcb, net, 0);
|
|
/* notify upper layer protocol */
|
|
if (stcb->sctp_socket) {
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
stcb->sctp_socket->so_snd.sb_cc = 0;
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
|
|
/* free the TCB but first save off the ep */
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_11);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Skip past the param header and then we will find the chunk that caused the
|
|
* problem. There are two possiblities ASCONF or FWD-TSN other than that and
|
|
* our peer must be broken.
|
|
*/
|
|
static void
|
|
sctp_process_unrecog_chunk(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr,
|
|
struct sctp_nets *net)
|
|
{
|
|
struct sctp_chunkhdr *chk;
|
|
|
|
chk = (struct sctp_chunkhdr *)((caddr_t)phdr + sizeof(*phdr));
|
|
switch (chk->chunk_type) {
|
|
case SCTP_ASCONF_ACK:
|
|
case SCTP_ASCONF:
|
|
sctp_asconf_cleanup(stcb, net);
|
|
break;
|
|
case SCTP_FORWARD_CUM_TSN:
|
|
stcb->asoc.prsctp_supported = 0;
|
|
break;
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"Peer does not support chunk type %d(%x)??\n",
|
|
chk->chunk_type, (uint32_t) chk->chunk_type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Skip past the param header and then we will find the param that caused the
|
|
* problem. There are a number of param's in a ASCONF OR the prsctp param
|
|
* these will turn of specific features.
|
|
* XXX: Is this the right thing to do?
|
|
*/
|
|
static void
|
|
sctp_process_unrecog_param(struct sctp_tcb *stcb, struct sctp_paramhdr *phdr)
|
|
{
|
|
struct sctp_paramhdr *pbad;
|
|
|
|
pbad = phdr + 1;
|
|
switch (ntohs(pbad->param_type)) {
|
|
/* pr-sctp draft */
|
|
case SCTP_PRSCTP_SUPPORTED:
|
|
stcb->asoc.prsctp_supported = 0;
|
|
break;
|
|
case SCTP_SUPPORTED_CHUNK_EXT:
|
|
break;
|
|
/* draft-ietf-tsvwg-addip-sctp */
|
|
case SCTP_HAS_NAT_SUPPORT:
|
|
stcb->asoc.peer_supports_nat = 0;
|
|
break;
|
|
case SCTP_ADD_IP_ADDRESS:
|
|
case SCTP_DEL_IP_ADDRESS:
|
|
case SCTP_SET_PRIM_ADDR:
|
|
stcb->asoc.asconf_supported = 0;
|
|
break;
|
|
case SCTP_SUCCESS_REPORT:
|
|
case SCTP_ERROR_CAUSE_IND:
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Huh, the peer does not support success? or error cause?\n");
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"Turning off ASCONF to this strange peer\n");
|
|
stcb->asoc.asconf_supported = 0;
|
|
break;
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"Peer does not support param type %d(%x)??\n",
|
|
pbad->param_type, (uint32_t) pbad->param_type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
sctp_handle_error(struct sctp_chunkhdr *ch,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
int chklen;
|
|
struct sctp_paramhdr *phdr;
|
|
uint16_t error, error_type;
|
|
uint16_t error_len;
|
|
struct sctp_association *asoc;
|
|
int adjust;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
|
|
/* parse through all of the errors and process */
|
|
asoc = &stcb->asoc;
|
|
phdr = (struct sctp_paramhdr *)((caddr_t)ch +
|
|
sizeof(struct sctp_chunkhdr));
|
|
chklen = ntohs(ch->chunk_length) - sizeof(struct sctp_chunkhdr);
|
|
error = 0;
|
|
while ((size_t)chklen >= sizeof(struct sctp_paramhdr)) {
|
|
/* Process an Error Cause */
|
|
error_type = ntohs(phdr->param_type);
|
|
error_len = ntohs(phdr->param_length);
|
|
if ((error_len > chklen) || (error_len == 0)) {
|
|
/* invalid param length for this param */
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Bogus length in error param- chunk left:%d errorlen:%d\n",
|
|
chklen, error_len);
|
|
return (0);
|
|
}
|
|
if (error == 0) {
|
|
/* report the first error cause */
|
|
error = error_type;
|
|
}
|
|
switch (error_type) {
|
|
case SCTP_CAUSE_INVALID_STREAM:
|
|
case SCTP_CAUSE_MISSING_PARAM:
|
|
case SCTP_CAUSE_INVALID_PARAM:
|
|
case SCTP_CAUSE_NO_USER_DATA:
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Software error we got a %d back? We have a bug :/ (or do they?)\n",
|
|
error_type);
|
|
break;
|
|
case SCTP_CAUSE_NAT_COLLIDING_STATE:
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Received Colliding state abort flags:%x\n",
|
|
ch->chunk_flags);
|
|
if (sctp_handle_nat_colliding_state(stcb)) {
|
|
return (0);
|
|
}
|
|
break;
|
|
case SCTP_CAUSE_NAT_MISSING_STATE:
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Received missing state abort flags:%x\n",
|
|
ch->chunk_flags);
|
|
if (sctp_handle_nat_missing_state(stcb, net)) {
|
|
return (0);
|
|
}
|
|
break;
|
|
case SCTP_CAUSE_STALE_COOKIE:
|
|
/*
|
|
* We only act if we have echoed a cookie and are
|
|
* waiting.
|
|
*/
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
|
|
int *p;
|
|
|
|
p = (int *)((caddr_t)phdr + sizeof(*phdr));
|
|
/* Save the time doubled */
|
|
asoc->cookie_preserve_req = ntohl(*p) << 1;
|
|
asoc->stale_cookie_count++;
|
|
if (asoc->stale_cookie_count >
|
|
asoc->max_init_times) {
|
|
sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
/* now free the asoc */
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_12);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
return (-1);
|
|
}
|
|
/* blast back to INIT state */
|
|
sctp_toss_old_cookies(stcb, &stcb->asoc);
|
|
asoc->state &= ~SCTP_STATE_COOKIE_ECHOED;
|
|
asoc->state |= SCTP_STATE_COOKIE_WAIT;
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
break;
|
|
case SCTP_CAUSE_UNRESOLVABLE_ADDR:
|
|
/*
|
|
* Nothing we can do here, we don't do hostname
|
|
* addresses so if the peer does not like my IPv6
|
|
* (or IPv4 for that matter) it does not matter. If
|
|
* they don't support that type of address, they can
|
|
* NOT possibly get that packet type... i.e. with no
|
|
* IPv6 you can't recieve a IPv6 packet. so we can
|
|
* safely ignore this one. If we ever added support
|
|
* for HOSTNAME Addresses, then we would need to do
|
|
* something here.
|
|
*/
|
|
break;
|
|
case SCTP_CAUSE_UNRECOG_CHUNK:
|
|
sctp_process_unrecog_chunk(stcb, phdr, net);
|
|
break;
|
|
case SCTP_CAUSE_UNRECOG_PARAM:
|
|
sctp_process_unrecog_param(stcb, phdr);
|
|
break;
|
|
case SCTP_CAUSE_COOKIE_IN_SHUTDOWN:
|
|
/*
|
|
* We ignore this since the timer will drive out a
|
|
* new cookie anyway and there timer will drive us
|
|
* to send a SHUTDOWN_COMPLETE. We can't send one
|
|
* here since we don't have their tag.
|
|
*/
|
|
break;
|
|
case SCTP_CAUSE_DELETING_LAST_ADDR:
|
|
case SCTP_CAUSE_RESOURCE_SHORTAGE:
|
|
case SCTP_CAUSE_DELETING_SRC_ADDR:
|
|
/*
|
|
* We should NOT get these here, but in a
|
|
* ASCONF-ACK.
|
|
*/
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "Peer sends ASCONF errors in a Operational Error?<%d>?\n",
|
|
error_type);
|
|
break;
|
|
case SCTP_CAUSE_OUT_OF_RESC:
|
|
/*
|
|
* And what, pray tell do we do with the fact that
|
|
* the peer is out of resources? Not really sure we
|
|
* could do anything but abort. I suspect this
|
|
* should have came WITH an abort instead of in a
|
|
* OP-ERROR.
|
|
*/
|
|
break;
|
|
default:
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_handle_error: unknown error type = 0x%xh\n",
|
|
error_type);
|
|
break;
|
|
}
|
|
adjust = SCTP_SIZE32(error_len);
|
|
chklen -= adjust;
|
|
phdr = (struct sctp_paramhdr *)((caddr_t)phdr + adjust);
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_REMOTE_ERROR, stcb, error, ch, SCTP_SO_NOT_LOCKED);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sctp_handle_init_ack(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst, struct sctphdr *sh,
|
|
struct sctp_init_ack_chunk *cp, struct sctp_tcb *stcb,
|
|
struct sctp_nets *net, int *abort_no_unlock,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id)
|
|
{
|
|
struct sctp_init_ack *init_ack;
|
|
struct mbuf *op_err;
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_init_ack: handling INIT-ACK\n");
|
|
|
|
if (stcb == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_init_ack: TCB is null\n");
|
|
return (-1);
|
|
}
|
|
if (ntohs(cp->ch.chunk_length) < sizeof(struct sctp_init_ack_chunk)) {
|
|
/* Invalid length */
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
init_ack = &cp->init;
|
|
/* validate parameters */
|
|
if (init_ack->initiate_tag == 0) {
|
|
/* protocol error... send an abort */
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
if (ntohl(init_ack->a_rwnd) < SCTP_MIN_RWND) {
|
|
/* protocol error... send an abort */
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
if (init_ack->num_inbound_streams == 0) {
|
|
/* protocol error... send an abort */
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
if (init_ack->num_outbound_streams == 0) {
|
|
/* protocol error... send an abort */
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_INVALID_PARAM, "");
|
|
sctp_abort_association(stcb->sctp_ep, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, net->port);
|
|
*abort_no_unlock = 1;
|
|
return (-1);
|
|
}
|
|
/* process according to association state... */
|
|
switch (stcb->asoc.state & SCTP_STATE_MASK) {
|
|
case SCTP_STATE_COOKIE_WAIT:
|
|
/* this is the expected state for this chunk */
|
|
/* process the INIT-ACK parameters */
|
|
if (stcb->asoc.primary_destination->dest_state &
|
|
SCTP_ADDR_UNCONFIRMED) {
|
|
/*
|
|
* The primary is where we sent the INIT, we can
|
|
* always consider it confirmed when the INIT-ACK is
|
|
* returned. Do this before we load addresses
|
|
* though.
|
|
*/
|
|
stcb->asoc.primary_destination->dest_state &=
|
|
~SCTP_ADDR_UNCONFIRMED;
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
|
|
stcb, 0, (void *)stcb->asoc.primary_destination, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (sctp_process_init_ack(m, iphlen, offset, src, dst, sh, cp, stcb,
|
|
net, abort_no_unlock,
|
|
mflowtype, mflowid,
|
|
vrf_id) < 0) {
|
|
/* error in parsing parameters */
|
|
return (-1);
|
|
}
|
|
/* update our state */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to COOKIE-ECHOED state\n");
|
|
SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_COOKIE_ECHOED);
|
|
|
|
/* reset the RTO calc */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
|
|
/*
|
|
* collapse the init timer back in case of a exponential
|
|
* backoff
|
|
*/
|
|
sctp_timer_start(SCTP_TIMER_TYPE_COOKIE, stcb->sctp_ep,
|
|
stcb, net);
|
|
/*
|
|
* the send at the end of the inbound data processing will
|
|
* cause the cookie to be sent
|
|
*/
|
|
break;
|
|
case SCTP_STATE_SHUTDOWN_SENT:
|
|
/* incorrect state... discard */
|
|
break;
|
|
case SCTP_STATE_COOKIE_ECHOED:
|
|
/* incorrect state... discard */
|
|
break;
|
|
case SCTP_STATE_OPEN:
|
|
/* incorrect state... discard */
|
|
break;
|
|
case SCTP_STATE_EMPTY:
|
|
case SCTP_STATE_INUSE:
|
|
default:
|
|
/* incorrect state... discard */
|
|
return (-1);
|
|
break;
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Leaving handle-init-ack end\n");
|
|
return (0);
|
|
}
|
|
|
|
static struct sctp_tcb *
|
|
sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
|
|
struct sctp_inpcb *inp, struct sctp_nets **netp,
|
|
struct sockaddr *init_src, int *notification,
|
|
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id, uint16_t port);
|
|
|
|
|
|
/*
|
|
* handle a state cookie for an existing association m: input packet mbuf
|
|
* chain-- assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a
|
|
* "split" mbuf and the cookie signature does not exist offset: offset into
|
|
* mbuf to the cookie-echo chunk
|
|
*/
|
|
static struct sctp_tcb *
|
|
sctp_process_cookie_existing(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
|
|
struct sctp_inpcb *inp, struct sctp_tcb *stcb, struct sctp_nets **netp,
|
|
struct sockaddr *init_src, int *notification,
|
|
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_init_chunk *init_cp, init_buf;
|
|
struct sctp_init_ack_chunk *initack_cp, initack_buf;
|
|
struct sctp_nets *net;
|
|
struct mbuf *op_err;
|
|
int init_offset, initack_offset, i;
|
|
int retval;
|
|
int spec_flag = 0;
|
|
uint32_t how_indx;
|
|
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
int j;
|
|
|
|
#endif
|
|
|
|
net = *netp;
|
|
/* I know that the TCB is non-NULL from the caller */
|
|
asoc = &stcb->asoc;
|
|
for (how_indx = 0; how_indx < sizeof(asoc->cookie_how); how_indx++) {
|
|
if (asoc->cookie_how[how_indx] == 0)
|
|
break;
|
|
}
|
|
if (how_indx < sizeof(asoc->cookie_how)) {
|
|
asoc->cookie_how[how_indx] = 1;
|
|
}
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
/* SHUTDOWN came in after sending INIT-ACK */
|
|
sctp_send_shutdown_ack(stcb, stcb->asoc.primary_destination);
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_COOKIE_IN_SHUTDOWN, "");
|
|
sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, net->port);
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 2;
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* find and validate the INIT chunk in the cookie (peer's info) the
|
|
* INIT should start after the cookie-echo header struct (chunk
|
|
* header, state cookie header struct)
|
|
*/
|
|
init_offset = offset += sizeof(struct sctp_cookie_echo_chunk);
|
|
|
|
init_cp = (struct sctp_init_chunk *)
|
|
sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
|
|
(uint8_t *) & init_buf);
|
|
if (init_cp == NULL) {
|
|
/* could not pull a INIT chunk in cookie */
|
|
return (NULL);
|
|
}
|
|
if (init_cp->ch.chunk_type != SCTP_INITIATION) {
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* find and validate the INIT-ACK chunk in the cookie (my info) the
|
|
* INIT-ACK follows the INIT chunk
|
|
*/
|
|
initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
|
|
initack_cp = (struct sctp_init_ack_chunk *)
|
|
sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
|
|
(uint8_t *) & initack_buf);
|
|
if (initack_cp == NULL) {
|
|
/* could not pull INIT-ACK chunk in cookie */
|
|
return (NULL);
|
|
}
|
|
if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
|
|
return (NULL);
|
|
}
|
|
if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
|
|
(ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag)) {
|
|
/*
|
|
* case D in Section 5.2.4 Table 2: MMAA process accordingly
|
|
* to get into the OPEN state
|
|
*/
|
|
if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
|
|
/*-
|
|
* Opps, this means that we somehow generated two vtag's
|
|
* the same. I.e. we did:
|
|
* Us Peer
|
|
* <---INIT(tag=a)------
|
|
* ----INIT-ACK(tag=t)-->
|
|
* ----INIT(tag=t)------> *1
|
|
* <---INIT-ACK(tag=a)---
|
|
* <----CE(tag=t)------------- *2
|
|
*
|
|
* At point *1 we should be generating a different
|
|
* tag t'. Which means we would throw away the CE and send
|
|
* ours instead. Basically this is case C (throw away side).
|
|
*/
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 17;
|
|
return (NULL);
|
|
|
|
}
|
|
switch (SCTP_GET_STATE(asoc)) {
|
|
case SCTP_STATE_COOKIE_WAIT:
|
|
case SCTP_STATE_COOKIE_ECHOED:
|
|
/*
|
|
* INIT was sent but got a COOKIE_ECHO with the
|
|
* correct tags... just accept it...but we must
|
|
* process the init so that we can make sure we have
|
|
* the right seq no's.
|
|
*/
|
|
/* First we must process the INIT !! */
|
|
retval = sctp_process_init(init_cp, stcb);
|
|
if (retval < 0) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 3;
|
|
return (NULL);
|
|
}
|
|
/* we have already processed the INIT so no problem */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp,
|
|
stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_13);
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp,
|
|
stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_14);
|
|
/* update current state */
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
|
|
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
|
|
else
|
|
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
|
|
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb, asoc->primary_destination);
|
|
}
|
|
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
|
|
(inp->sctp_socket->so_qlimit == 0)
|
|
) {
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
/*
|
|
* Here is where collision would go if we
|
|
* did a connect() and instead got a
|
|
* init/init-ack/cookie done before the
|
|
* init-ack came back..
|
|
*/
|
|
stcb->sctp_ep->sctp_flags |=
|
|
SCTP_PCB_FLAGS_CONNECTED;
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
return (NULL);
|
|
}
|
|
#endif
|
|
soisconnected(stcb->sctp_socket);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
/* notify upper layer */
|
|
*notification = SCTP_NOTIFY_ASSOC_UP;
|
|
/*
|
|
* since we did not send a HB make sure we don't
|
|
* double things
|
|
*/
|
|
net->hb_responded = 1;
|
|
net->RTO = sctp_calculate_rto(stcb, asoc, net,
|
|
&cookie->time_entered,
|
|
sctp_align_unsafe_makecopy,
|
|
SCTP_RTT_FROM_NON_DATA);
|
|
|
|
if (stcb->asoc.sctp_autoclose_ticks &&
|
|
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE))) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
|
|
inp, stcb, NULL);
|
|
}
|
|
break;
|
|
default:
|
|
/*
|
|
* we're in the OPEN state (or beyond), so peer must
|
|
* have simply lost the COOKIE-ACK
|
|
*/
|
|
break;
|
|
} /* end switch */
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
/*
|
|
* We ignore the return code here.. not sure if we should
|
|
* somehow abort.. but we do have an existing asoc. This
|
|
* really should not fail.
|
|
*/
|
|
if (sctp_load_addresses_from_init(stcb, m,
|
|
init_offset + sizeof(struct sctp_init_chunk),
|
|
initack_offset, src, dst, init_src)) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 4;
|
|
return (NULL);
|
|
}
|
|
/* respond with a COOKIE-ACK */
|
|
sctp_toss_old_cookies(stcb, asoc);
|
|
sctp_send_cookie_ack(stcb);
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 5;
|
|
return (stcb);
|
|
}
|
|
if (ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
|
|
ntohl(init_cp->init.initiate_tag) == asoc->peer_vtag &&
|
|
cookie->tie_tag_my_vtag == 0 &&
|
|
cookie->tie_tag_peer_vtag == 0) {
|
|
/*
|
|
* case C in Section 5.2.4 Table 2: XMOO silently discard
|
|
*/
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 6;
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* If nat support, and the below and stcb is established, send back
|
|
* a ABORT(colliding state) if we are established.
|
|
*/
|
|
if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) &&
|
|
(asoc->peer_supports_nat) &&
|
|
((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
|
|
((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
|
|
(asoc->peer_vtag == 0)))) {
|
|
/*
|
|
* Special case - Peer's support nat. We may have two init's
|
|
* that we gave out the same tag on since one was not
|
|
* established.. i.e. we get INIT from host-1 behind the nat
|
|
* and we respond tag-a, we get a INIT from host-2 behind
|
|
* the nat and we get tag-a again. Then we bring up host-1
|
|
* (or 2's) assoc, Then comes the cookie from hsot-2 (or 1).
|
|
* Now we have colliding state. We must send an abort here
|
|
* with colliding state indication.
|
|
*/
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_NAT_COLLIDING_STATE, "");
|
|
sctp_send_abort(m, iphlen, src, dst, sh, 0, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
return (NULL);
|
|
}
|
|
if ((ntohl(initack_cp->init.initiate_tag) == asoc->my_vtag) &&
|
|
((ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) ||
|
|
(asoc->peer_vtag == 0))) {
|
|
/*
|
|
* case B in Section 5.2.4 Table 2: MXAA or MOAA my info
|
|
* should be ok, re-accept peer info
|
|
*/
|
|
if (ntohl(initack_cp->init.initial_tsn) != asoc->init_seq_number) {
|
|
/*
|
|
* Extension of case C. If we hit this, then the
|
|
* random number generator returned the same vtag
|
|
* when we first sent our INIT-ACK and when we later
|
|
* sent our INIT. The side with the seq numbers that
|
|
* are different will be the one that normnally
|
|
* would have hit case C. This in effect "extends"
|
|
* our vtags in this collision case to be 64 bits.
|
|
* The same collision could occur aka you get both
|
|
* vtag and seq number the same twice in a row.. but
|
|
* is much less likely. If it did happen then we
|
|
* would proceed through and bring up the assoc.. we
|
|
* may end up with the wrong stream setup however..
|
|
* which would be bad.. but there is no way to
|
|
* tell.. until we send on a stream that does not
|
|
* exist :-)
|
|
*/
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 7;
|
|
|
|
return (NULL);
|
|
}
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 8;
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_15);
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
/*
|
|
* since we did not send a HB make sure we don't double
|
|
* things
|
|
*/
|
|
net->hb_responded = 1;
|
|
if (stcb->asoc.sctp_autoclose_ticks &&
|
|
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb,
|
|
NULL);
|
|
}
|
|
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
|
|
asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
|
|
|
|
if (ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) {
|
|
/*
|
|
* Ok the peer probably discarded our data (if we
|
|
* echoed a cookie+data). So anything on the
|
|
* sent_queue should be marked for retransmit, we
|
|
* may not get something to kick us so it COULD
|
|
* still take a timeout to move these.. but it can't
|
|
* hurt to mark them.
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (chk->sent < SCTP_DATAGRAM_RESEND) {
|
|
chk->sent = SCTP_DATAGRAM_RESEND;
|
|
sctp_flight_size_decrease(chk);
|
|
sctp_total_flight_decrease(stcb, chk);
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
spec_flag++;
|
|
}
|
|
}
|
|
|
|
}
|
|
/* process the INIT info (peer's info) */
|
|
retval = sctp_process_init(init_cp, stcb);
|
|
if (retval < 0) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 9;
|
|
return (NULL);
|
|
}
|
|
if (sctp_load_addresses_from_init(stcb, m,
|
|
init_offset + sizeof(struct sctp_init_chunk),
|
|
initack_offset, src, dst, init_src)) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 10;
|
|
return (NULL);
|
|
}
|
|
if ((asoc->state & SCTP_STATE_COOKIE_WAIT) ||
|
|
(asoc->state & SCTP_STATE_COOKIE_ECHOED)) {
|
|
*notification = SCTP_NOTIFY_ASSOC_UP;
|
|
|
|
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
|
|
(inp->sctp_socket->so_qlimit == 0)) {
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
stcb->sctp_ep->sctp_flags |=
|
|
SCTP_PCB_FLAGS_CONNECTED;
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
return (NULL);
|
|
}
|
|
#endif
|
|
soisconnected(stcb->sctp_socket);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)
|
|
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
|
|
else
|
|
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
|
|
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
|
|
} else if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
|
|
SCTP_STAT_INCR_COUNTER32(sctps_restartestab);
|
|
} else {
|
|
SCTP_STAT_INCR_COUNTER32(sctps_collisionestab);
|
|
}
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb, asoc->primary_destination);
|
|
}
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
sctp_toss_old_cookies(stcb, asoc);
|
|
sctp_send_cookie_ack(stcb);
|
|
if (spec_flag) {
|
|
/*
|
|
* only if we have retrans set do we do this. What
|
|
* this call does is get only the COOKIE-ACK out and
|
|
* then when we return the normal call to
|
|
* sctp_chunk_output will get the retrans out behind
|
|
* this.
|
|
*/
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_COOKIE_ACK, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 11;
|
|
|
|
return (stcb);
|
|
}
|
|
if ((ntohl(initack_cp->init.initiate_tag) != asoc->my_vtag &&
|
|
ntohl(init_cp->init.initiate_tag) != asoc->peer_vtag) &&
|
|
cookie->tie_tag_my_vtag == asoc->my_vtag_nonce &&
|
|
cookie->tie_tag_peer_vtag == asoc->peer_vtag_nonce &&
|
|
cookie->tie_tag_peer_vtag != 0) {
|
|
struct sctpasochead *head;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
|
|
if (asoc->peer_supports_nat) {
|
|
/*
|
|
* This is a gross gross hack. Just call the
|
|
* cookie_new code since we are allowing a duplicate
|
|
* association. I hope this works...
|
|
*/
|
|
return (sctp_process_cookie_new(m, iphlen, offset, src, dst,
|
|
sh, cookie, cookie_len,
|
|
inp, netp, init_src, notification,
|
|
auth_skipped, auth_offset, auth_len,
|
|
mflowtype, mflowid,
|
|
vrf_id, port));
|
|
}
|
|
/*
|
|
* case A in Section 5.2.4 Table 2: XXMM (peer restarted)
|
|
*/
|
|
/* temp code */
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 12;
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, inp, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_16);
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_17);
|
|
|
|
/* notify upper layer */
|
|
*notification = SCTP_NOTIFY_ASSOC_RESTART;
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
if ((SCTP_GET_STATE(asoc) != SCTP_STATE_OPEN) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_RECEIVED) &&
|
|
(SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT)) {
|
|
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
|
|
}
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) {
|
|
SCTP_STAT_INCR_GAUGE32(sctps_restartestab);
|
|
} else if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) {
|
|
SCTP_STAT_INCR_GAUGE32(sctps_collisionestab);
|
|
}
|
|
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb, asoc->primary_destination);
|
|
|
|
} else if (!(asoc->state & SCTP_STATE_SHUTDOWN_SENT)) {
|
|
/* move to OPEN state, if not in SHUTDOWN_SENT */
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
}
|
|
asoc->pre_open_streams =
|
|
ntohs(initack_cp->init.num_outbound_streams);
|
|
asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
|
|
asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
|
|
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
|
|
|
|
asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
|
|
|
|
asoc->str_reset_seq_in = asoc->init_seq_number;
|
|
|
|
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
|
|
if (asoc->mapping_array) {
|
|
memset(asoc->mapping_array, 0,
|
|
asoc->mapping_array_size);
|
|
}
|
|
if (asoc->nr_mapping_array) {
|
|
memset(asoc->nr_mapping_array, 0,
|
|
asoc->mapping_array_size);
|
|
}
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
#endif
|
|
SCTP_INP_INFO_WLOCK();
|
|
SCTP_INP_WLOCK(stcb->sctp_ep);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_add_int(&stcb->asoc.refcnt, -1);
|
|
/* send up all the data */
|
|
SCTP_TCB_SEND_LOCK(stcb);
|
|
|
|
sctp_report_all_outbound(stcb, 0, 1, SCTP_SO_LOCKED);
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
stcb->asoc.strmout[i].chunks_on_queues = 0;
|
|
#if defined(SCTP_DETAILED_STR_STATS)
|
|
for (j = 0; j < SCTP_PR_SCTP_MAX + 1; j++) {
|
|
asoc->strmout[i].abandoned_sent[j] = 0;
|
|
asoc->strmout[i].abandoned_unsent[j] = 0;
|
|
}
|
|
#else
|
|
asoc->strmout[i].abandoned_sent[0] = 0;
|
|
asoc->strmout[i].abandoned_unsent[0] = 0;
|
|
#endif
|
|
stcb->asoc.strmout[i].stream_no = i;
|
|
stcb->asoc.strmout[i].next_sequence_send = 0;
|
|
stcb->asoc.strmout[i].last_msg_incomplete = 0;
|
|
}
|
|
/* process the INIT-ACK info (my info) */
|
|
asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
|
|
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
|
|
|
|
/* pull from vtag hash */
|
|
LIST_REMOVE(stcb, sctp_asocs);
|
|
/* re-insert to new vtag position */
|
|
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag,
|
|
SCTP_BASE_INFO(hashasocmark))];
|
|
/*
|
|
* put it in the bucket in the vtag hash of assoc's for the
|
|
* system
|
|
*/
|
|
LIST_INSERT_HEAD(head, stcb, sctp_asocs);
|
|
|
|
SCTP_TCB_SEND_UNLOCK(stcb);
|
|
SCTP_INP_WUNLOCK(stcb->sctp_ep);
|
|
SCTP_INP_INFO_WUNLOCK();
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
asoc->total_flight = 0;
|
|
asoc->total_flight_count = 0;
|
|
/* process the INIT info (peer's info) */
|
|
retval = sctp_process_init(init_cp, stcb);
|
|
if (retval < 0) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 13;
|
|
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* since we did not send a HB make sure we don't double
|
|
* things
|
|
*/
|
|
net->hb_responded = 1;
|
|
|
|
if (sctp_load_addresses_from_init(stcb, m,
|
|
init_offset + sizeof(struct sctp_init_chunk),
|
|
initack_offset, src, dst, init_src)) {
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 14;
|
|
|
|
return (NULL);
|
|
}
|
|
/* respond with a COOKIE-ACK */
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
sctp_toss_old_cookies(stcb, asoc);
|
|
sctp_send_cookie_ack(stcb);
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 15;
|
|
|
|
return (stcb);
|
|
}
|
|
if (how_indx < sizeof(asoc->cookie_how))
|
|
asoc->cookie_how[how_indx] = 16;
|
|
/* all other cases... */
|
|
return (NULL);
|
|
}
|
|
|
|
|
|
/*
|
|
* handle a state cookie for a new association m: input packet mbuf chain--
|
|
* assumes a pullup on IP/SCTP/COOKIE-ECHO chunk note: this is a "split" mbuf
|
|
* and the cookie signature does not exist offset: offset into mbuf to the
|
|
* cookie-echo chunk length: length of the cookie chunk to: where the init
|
|
* was from returns a new TCB
|
|
*/
|
|
static struct sctp_tcb *
|
|
sctp_process_cookie_new(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_state_cookie *cookie, int cookie_len,
|
|
struct sctp_inpcb *inp, struct sctp_nets **netp,
|
|
struct sockaddr *init_src, int *notification,
|
|
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
struct sctp_tcb *stcb;
|
|
struct sctp_init_chunk *init_cp, init_buf;
|
|
struct sctp_init_ack_chunk *initack_cp, initack_buf;
|
|
union sctp_sockstore store;
|
|
struct sctp_association *asoc;
|
|
int init_offset, initack_offset, initack_limit;
|
|
int retval;
|
|
int error = 0;
|
|
uint8_t auth_chunk_buf[SCTP_PARAM_BUFFER_SIZE];
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
so = SCTP_INP_SO(inp);
|
|
#endif
|
|
|
|
/*
|
|
* find and validate the INIT chunk in the cookie (peer's info) the
|
|
* INIT should start after the cookie-echo header struct (chunk
|
|
* header, state cookie header struct)
|
|
*/
|
|
init_offset = offset + sizeof(struct sctp_cookie_echo_chunk);
|
|
init_cp = (struct sctp_init_chunk *)
|
|
sctp_m_getptr(m, init_offset, sizeof(struct sctp_init_chunk),
|
|
(uint8_t *) & init_buf);
|
|
if (init_cp == NULL) {
|
|
/* could not pull a INIT chunk in cookie */
|
|
SCTPDBG(SCTP_DEBUG_INPUT1,
|
|
"process_cookie_new: could not pull INIT chunk hdr\n");
|
|
return (NULL);
|
|
}
|
|
if (init_cp->ch.chunk_type != SCTP_INITIATION) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "HUH? process_cookie_new: could not find INIT chunk!\n");
|
|
return (NULL);
|
|
}
|
|
initack_offset = init_offset + SCTP_SIZE32(ntohs(init_cp->ch.chunk_length));
|
|
/*
|
|
* find and validate the INIT-ACK chunk in the cookie (my info) the
|
|
* INIT-ACK follows the INIT chunk
|
|
*/
|
|
initack_cp = (struct sctp_init_ack_chunk *)
|
|
sctp_m_getptr(m, initack_offset, sizeof(struct sctp_init_ack_chunk),
|
|
(uint8_t *) & initack_buf);
|
|
if (initack_cp == NULL) {
|
|
/* could not pull INIT-ACK chunk in cookie */
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: could not pull INIT-ACK chunk hdr\n");
|
|
return (NULL);
|
|
}
|
|
if (initack_cp->ch.chunk_type != SCTP_INITIATION_ACK) {
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* NOTE: We can't use the INIT_ACK's chk_length to determine the
|
|
* "initack_limit" value. This is because the chk_length field
|
|
* includes the length of the cookie, but the cookie is omitted when
|
|
* the INIT and INIT_ACK are tacked onto the cookie...
|
|
*/
|
|
initack_limit = offset + cookie_len;
|
|
|
|
/*
|
|
* now that we know the INIT/INIT-ACK are in place, create a new TCB
|
|
* and popluate
|
|
*/
|
|
|
|
/*
|
|
* Here we do a trick, we set in NULL for the proc/thread argument.
|
|
* We do this since in effect we only use the p argument when the
|
|
* socket is unbound and we must do an implicit bind. Since we are
|
|
* getting a cookie, we cannot be unbound.
|
|
*/
|
|
stcb = sctp_aloc_assoc(inp, init_src, &error,
|
|
ntohl(initack_cp->init.initiate_tag), vrf_id,
|
|
ntohs(initack_cp->init.num_outbound_streams),
|
|
(struct thread *)NULL
|
|
);
|
|
if (stcb == NULL) {
|
|
struct mbuf *op_err;
|
|
|
|
/* memory problem? */
|
|
SCTPDBG(SCTP_DEBUG_INPUT1,
|
|
"process_cookie_new: no room for another TCB!\n");
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
|
|
sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
return (NULL);
|
|
}
|
|
/* get the correct sctp_nets */
|
|
if (netp)
|
|
*netp = sctp_findnet(stcb, init_src);
|
|
|
|
asoc = &stcb->asoc;
|
|
/* get scope variables out of cookie */
|
|
asoc->scope.ipv4_local_scope = cookie->ipv4_scope;
|
|
asoc->scope.site_scope = cookie->site_scope;
|
|
asoc->scope.local_scope = cookie->local_scope;
|
|
asoc->scope.loopback_scope = cookie->loopback_scope;
|
|
|
|
if ((asoc->scope.ipv4_addr_legal != cookie->ipv4_addr_legal) ||
|
|
(asoc->scope.ipv6_addr_legal != cookie->ipv6_addr_legal)) {
|
|
struct mbuf *op_err;
|
|
|
|
/*
|
|
* Houston we have a problem. The EP changed while the
|
|
* cookie was in flight. Only recourse is to abort the
|
|
* association.
|
|
*/
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
|
|
sctp_abort_association(inp, (struct sctp_tcb *)NULL, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_18);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (NULL);
|
|
}
|
|
/* process the INIT-ACK info (my info) */
|
|
asoc->my_vtag = ntohl(initack_cp->init.initiate_tag);
|
|
asoc->my_rwnd = ntohl(initack_cp->init.a_rwnd);
|
|
asoc->pre_open_streams = ntohs(initack_cp->init.num_outbound_streams);
|
|
asoc->init_seq_number = ntohl(initack_cp->init.initial_tsn);
|
|
asoc->sending_seq = asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number;
|
|
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
|
|
asoc->asconf_seq_in = asoc->last_acked_seq = asoc->init_seq_number - 1;
|
|
asoc->str_reset_seq_in = asoc->init_seq_number;
|
|
|
|
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
|
|
|
|
/* process the INIT info (peer's info) */
|
|
if (netp)
|
|
retval = sctp_process_init(init_cp, stcb);
|
|
else
|
|
retval = 0;
|
|
if (retval < 0) {
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_19);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (NULL);
|
|
}
|
|
/* load all addresses */
|
|
if (sctp_load_addresses_from_init(stcb, m,
|
|
init_offset + sizeof(struct sctp_init_chunk), initack_offset,
|
|
src, dst, init_src)) {
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_20);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* verify any preceding AUTH chunk that was skipped
|
|
*/
|
|
/* pull the local authentication parameters from the cookie/init-ack */
|
|
sctp_auth_get_cookie_params(stcb, m,
|
|
initack_offset + sizeof(struct sctp_init_ack_chunk),
|
|
initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)));
|
|
if (auth_skipped) {
|
|
struct sctp_auth_chunk *auth;
|
|
|
|
auth = (struct sctp_auth_chunk *)
|
|
sctp_m_getptr(m, auth_offset, auth_len, auth_chunk_buf);
|
|
if ((auth == NULL) || sctp_handle_auth(stcb, auth, m, auth_offset)) {
|
|
/* auth HMAC failed, dump the assoc and packet */
|
|
SCTPDBG(SCTP_DEBUG_AUTH1,
|
|
"COOKIE-ECHO: AUTH failed\n");
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_21);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (NULL);
|
|
} else {
|
|
/* remaining chunks checked... good to go */
|
|
stcb->asoc.authenticated = 1;
|
|
}
|
|
}
|
|
/* update current state */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb, asoc->primary_destination);
|
|
}
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_passiveestab);
|
|
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
|
|
|
|
/*
|
|
* if we're doing ASCONFs, check to see if we have any new local
|
|
* addresses that need to get added to the peer (eg. addresses
|
|
* changed while cookie echo in flight). This needs to be done
|
|
* after we go to the OPEN state to do the correct asconf
|
|
* processing. else, make sure we have the correct addresses in our
|
|
* lists
|
|
*/
|
|
|
|
/* warning, we re-use sin, sin6, sa_store here! */
|
|
/* pull in local_address (our "from" address) */
|
|
switch (cookie->laddr_type) {
|
|
#ifdef INET
|
|
case SCTP_IPV4_ADDRESS:
|
|
/* source addr is IPv4 */
|
|
memset(&store.sin, 0, sizeof(struct sockaddr_in));
|
|
store.sin.sin_family = AF_INET;
|
|
store.sin.sin_len = sizeof(struct sockaddr_in);
|
|
store.sin.sin_addr.s_addr = cookie->laddress[0];
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case SCTP_IPV6_ADDRESS:
|
|
/* source addr is IPv6 */
|
|
memset(&store.sin6, 0, sizeof(struct sockaddr_in6));
|
|
store.sin6.sin6_family = AF_INET6;
|
|
store.sin6.sin6_len = sizeof(struct sockaddr_in6);
|
|
store.sin6.sin6_scope_id = cookie->scope_id;
|
|
memcpy(&store.sin6.sin6_addr, cookie->laddress, sizeof(struct in6_addr));
|
|
break;
|
|
#endif
|
|
default:
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_22);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
return (NULL);
|
|
}
|
|
|
|
/* set up to notify upper layer */
|
|
*notification = SCTP_NOTIFY_ASSOC_UP;
|
|
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
|
|
(inp->sctp_socket->so_qlimit == 0)) {
|
|
/*
|
|
* This is an endpoint that called connect() how it got a
|
|
* cookie that is NEW is a bit of a mystery. It must be that
|
|
* the INIT was sent, but before it got there.. a complete
|
|
* INIT/INIT-ACK/COOKIE arrived. But of course then it
|
|
* should have went to the other code.. not here.. oh well..
|
|
* a bit of protection is worth having..
|
|
*/
|
|
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
return (NULL);
|
|
}
|
|
#endif
|
|
soisconnected(stcb->sctp_socket);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
} else if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
|
|
(inp->sctp_socket->so_qlimit)) {
|
|
/*
|
|
* We don't want to do anything with this one. Since it is
|
|
* the listening guy. The timer will get started for
|
|
* accepted connections in the caller.
|
|
*/
|
|
;
|
|
}
|
|
/* since we did not send a HB make sure we don't double things */
|
|
if ((netp) && (*netp))
|
|
(*netp)->hb_responded = 1;
|
|
|
|
if (stcb->asoc.sctp_autoclose_ticks &&
|
|
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_AUTOCLOSE)) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE, inp, stcb, NULL);
|
|
}
|
|
(void)SCTP_GETTIME_TIMEVAL(&stcb->asoc.time_entered);
|
|
if ((netp != NULL) && (*netp != NULL)) {
|
|
/* calculate the RTT and set the encaps port */
|
|
(*netp)->RTO = sctp_calculate_rto(stcb, asoc, *netp,
|
|
&cookie->time_entered, sctp_align_unsafe_makecopy,
|
|
SCTP_RTT_FROM_NON_DATA);
|
|
#if defined(INET) || defined(INET6)
|
|
if (((*netp)->port == 0) && (port != 0)) {
|
|
sctp_pathmtu_adjustment(stcb, (*netp)->mtu - sizeof(struct udphdr));
|
|
}
|
|
(*netp)->port = port;
|
|
#endif
|
|
}
|
|
/* respond with a COOKIE-ACK */
|
|
sctp_send_cookie_ack(stcb);
|
|
|
|
/*
|
|
* check the address lists for any ASCONFs that need to be sent
|
|
* AFTER the cookie-ack is sent
|
|
*/
|
|
sctp_check_address_list(stcb, m,
|
|
initack_offset + sizeof(struct sctp_init_ack_chunk),
|
|
initack_limit - (initack_offset + sizeof(struct sctp_init_ack_chunk)),
|
|
&store.sa, cookie->local_scope, cookie->site_scope,
|
|
cookie->ipv4_scope, cookie->loopback_scope);
|
|
|
|
|
|
return (stcb);
|
|
}
|
|
|
|
/*
|
|
* CODE LIKE THIS NEEDS TO RUN IF the peer supports the NAT extension, i.e
|
|
* we NEED to make sure we are not already using the vtag. If so we
|
|
* need to send back an ABORT-TRY-AGAIN-WITH-NEW-TAG No middle box bit!
|
|
head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
|
|
SCTP_BASE_INFO(hashasocmark))];
|
|
LIST_FOREACH(stcb, head, sctp_asocs) {
|
|
if ((stcb->asoc.my_vtag == tag) && (stcb->rport == rport) && (inp == stcb->sctp_ep)) {
|
|
-- SEND ABORT - TRY AGAIN --
|
|
}
|
|
}
|
|
*/
|
|
|
|
/*
|
|
* handles a COOKIE-ECHO message stcb: modified to either a new or left as
|
|
* existing (non-NULL) TCB
|
|
*/
|
|
static struct mbuf *
|
|
sctp_handle_cookie_echo(struct mbuf *m, int iphlen, int offset,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_cookie_echo_chunk *cp,
|
|
struct sctp_inpcb **inp_p, struct sctp_tcb **stcb, struct sctp_nets **netp,
|
|
int auth_skipped, uint32_t auth_offset, uint32_t auth_len,
|
|
struct sctp_tcb **locked_tcb,
|
|
uint8_t mflowtype, uint32_t mflowid,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
struct sctp_state_cookie *cookie;
|
|
struct sctp_tcb *l_stcb = *stcb;
|
|
struct sctp_inpcb *l_inp;
|
|
struct sockaddr *to;
|
|
struct sctp_pcb *ep;
|
|
struct mbuf *m_sig;
|
|
uint8_t calc_sig[SCTP_SIGNATURE_SIZE], tmp_sig[SCTP_SIGNATURE_SIZE];
|
|
uint8_t *sig;
|
|
uint8_t cookie_ok = 0;
|
|
unsigned int sig_offset, cookie_offset;
|
|
unsigned int cookie_len;
|
|
struct timeval now;
|
|
struct timeval time_expires;
|
|
int notification = 0;
|
|
struct sctp_nets *netl;
|
|
int had_a_existing_tcb = 0;
|
|
int send_int_conf = 0;
|
|
|
|
#ifdef INET
|
|
struct sockaddr_in sin;
|
|
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 sin6;
|
|
|
|
#endif
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_cookie: handling COOKIE-ECHO\n");
|
|
|
|
if (inp_p == NULL) {
|
|
return (NULL);
|
|
}
|
|
cookie = &cp->cookie;
|
|
cookie_offset = offset + sizeof(struct sctp_chunkhdr);
|
|
cookie_len = ntohs(cp->ch.chunk_length);
|
|
|
|
if ((cookie->peerport != sh->src_port) ||
|
|
(cookie->myport != sh->dest_port) ||
|
|
(cookie->my_vtag != sh->v_tag)) {
|
|
/*
|
|
* invalid ports or bad tag. Note that we always leave the
|
|
* v_tag in the header in network order and when we stored
|
|
* it in the my_vtag slot we also left it in network order.
|
|
* This maintains the match even though it may be in the
|
|
* opposite byte order of the machine :->
|
|
*/
|
|
return (NULL);
|
|
}
|
|
if (cookie_len < sizeof(struct sctp_cookie_echo_chunk) +
|
|
sizeof(struct sctp_init_chunk) +
|
|
sizeof(struct sctp_init_ack_chunk) + SCTP_SIGNATURE_SIZE) {
|
|
/* cookie too small */
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* split off the signature into its own mbuf (since it should not be
|
|
* calculated in the sctp_hmac_m() call).
|
|
*/
|
|
sig_offset = offset + cookie_len - SCTP_SIGNATURE_SIZE;
|
|
m_sig = m_split(m, sig_offset, M_NOWAIT);
|
|
if (m_sig == NULL) {
|
|
/* out of memory or ?? */
|
|
return (NULL);
|
|
}
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(m_sig, SCTP_MBUF_SPLIT);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* compute the signature/digest for the cookie
|
|
*/
|
|
ep = &(*inp_p)->sctp_ep;
|
|
l_inp = *inp_p;
|
|
if (l_stcb) {
|
|
SCTP_TCB_UNLOCK(l_stcb);
|
|
}
|
|
SCTP_INP_RLOCK(l_inp);
|
|
if (l_stcb) {
|
|
SCTP_TCB_LOCK(l_stcb);
|
|
}
|
|
/* which cookie is it? */
|
|
if ((cookie->time_entered.tv_sec < (long)ep->time_of_secret_change) &&
|
|
(ep->current_secret_number != ep->last_secret_number)) {
|
|
/* it's the old cookie */
|
|
(void)sctp_hmac_m(SCTP_HMAC,
|
|
(uint8_t *) ep->secret_key[(int)ep->last_secret_number],
|
|
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
|
|
} else {
|
|
/* it's the current cookie */
|
|
(void)sctp_hmac_m(SCTP_HMAC,
|
|
(uint8_t *) ep->secret_key[(int)ep->current_secret_number],
|
|
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
|
|
}
|
|
/* get the signature */
|
|
SCTP_INP_RUNLOCK(l_inp);
|
|
sig = (uint8_t *) sctp_m_getptr(m_sig, 0, SCTP_SIGNATURE_SIZE, (uint8_t *) & tmp_sig);
|
|
if (sig == NULL) {
|
|
/* couldn't find signature */
|
|
sctp_m_freem(m_sig);
|
|
return (NULL);
|
|
}
|
|
/* compare the received digest with the computed digest */
|
|
if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) != 0) {
|
|
/* try the old cookie? */
|
|
if ((cookie->time_entered.tv_sec == (long)ep->time_of_secret_change) &&
|
|
(ep->current_secret_number != ep->last_secret_number)) {
|
|
/* compute digest with old */
|
|
(void)sctp_hmac_m(SCTP_HMAC,
|
|
(uint8_t *) ep->secret_key[(int)ep->last_secret_number],
|
|
SCTP_SECRET_SIZE, m, cookie_offset, calc_sig, 0);
|
|
/* compare */
|
|
if (memcmp(calc_sig, sig, SCTP_SIGNATURE_SIZE) == 0)
|
|
cookie_ok = 1;
|
|
}
|
|
} else {
|
|
cookie_ok = 1;
|
|
}
|
|
|
|
/*
|
|
* Now before we continue we must reconstruct our mbuf so that
|
|
* normal processing of any other chunks will work.
|
|
*/
|
|
{
|
|
struct mbuf *m_at;
|
|
|
|
m_at = m;
|
|
while (SCTP_BUF_NEXT(m_at) != NULL) {
|
|
m_at = SCTP_BUF_NEXT(m_at);
|
|
}
|
|
SCTP_BUF_NEXT(m_at) = m_sig;
|
|
}
|
|
|
|
if (cookie_ok == 0) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "handle_cookie_echo: cookie signature validation failed!\n");
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"offset = %u, cookie_offset = %u, sig_offset = %u\n",
|
|
(uint32_t) offset, cookie_offset, sig_offset);
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* check the cookie timestamps to be sure it's not stale
|
|
*/
|
|
(void)SCTP_GETTIME_TIMEVAL(&now);
|
|
/* Expire time is in Ticks, so we convert to seconds */
|
|
time_expires.tv_sec = cookie->time_entered.tv_sec + TICKS_TO_SEC(cookie->cookie_life);
|
|
time_expires.tv_usec = cookie->time_entered.tv_usec;
|
|
/*
|
|
* TODO sctp_constants.h needs alternative time macros when _KERNEL
|
|
* is undefined.
|
|
*/
|
|
if (timevalcmp(&now, &time_expires, >)) {
|
|
/* cookie is stale! */
|
|
struct mbuf *op_err;
|
|
struct sctp_error_stale_cookie *cause;
|
|
uint32_t tim;
|
|
|
|
op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_error_stale_cookie),
|
|
0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err == NULL) {
|
|
/* FOOBAR */
|
|
return (NULL);
|
|
}
|
|
/* Set the len */
|
|
SCTP_BUF_LEN(op_err) = sizeof(struct sctp_error_stale_cookie);
|
|
cause = mtod(op_err, struct sctp_error_stale_cookie *);
|
|
cause->cause.code = htons(SCTP_CAUSE_STALE_COOKIE);
|
|
cause->cause.length = htons((sizeof(struct sctp_paramhdr) +
|
|
(sizeof(uint32_t))));
|
|
/* seconds to usec */
|
|
tim = (now.tv_sec - time_expires.tv_sec) * 1000000;
|
|
/* add in usec */
|
|
if (tim == 0)
|
|
tim = now.tv_usec - cookie->time_entered.tv_usec;
|
|
cause->stale_time = htonl(tim);
|
|
sctp_send_operr_to(src, dst, sh, cookie->peers_vtag, op_err,
|
|
mflowtype, mflowid, l_inp->fibnum,
|
|
vrf_id, port);
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* Now we must see with the lookup address if we have an existing
|
|
* asoc. This will only happen if we were in the COOKIE-WAIT state
|
|
* and a INIT collided with us and somewhere the peer sent the
|
|
* cookie on another address besides the single address our assoc
|
|
* had for him. In this case we will have one of the tie-tags set at
|
|
* least AND the address field in the cookie can be used to look it
|
|
* up.
|
|
*/
|
|
to = NULL;
|
|
switch (cookie->addr_type) {
|
|
#ifdef INET6
|
|
case SCTP_IPV6_ADDRESS:
|
|
memset(&sin6, 0, sizeof(sin6));
|
|
sin6.sin6_family = AF_INET6;
|
|
sin6.sin6_len = sizeof(sin6);
|
|
sin6.sin6_port = sh->src_port;
|
|
sin6.sin6_scope_id = cookie->scope_id;
|
|
memcpy(&sin6.sin6_addr.s6_addr, cookie->address,
|
|
sizeof(sin6.sin6_addr.s6_addr));
|
|
to = (struct sockaddr *)&sin6;
|
|
break;
|
|
#endif
|
|
#ifdef INET
|
|
case SCTP_IPV4_ADDRESS:
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(sin);
|
|
sin.sin_port = sh->src_port;
|
|
sin.sin_addr.s_addr = cookie->address[0];
|
|
to = (struct sockaddr *)&sin;
|
|
break;
|
|
#endif
|
|
default:
|
|
/* This should not happen */
|
|
return (NULL);
|
|
}
|
|
if (*stcb == NULL) {
|
|
/* Yep, lets check */
|
|
*stcb = sctp_findassociation_ep_addr(inp_p, to, netp, dst, NULL);
|
|
if (*stcb == NULL) {
|
|
/*
|
|
* We should have only got back the same inp. If we
|
|
* got back a different ep we have a problem. The
|
|
* original findep got back l_inp and now
|
|
*/
|
|
if (l_inp != *inp_p) {
|
|
SCTP_PRINTF("Bad problem find_ep got a diff inp then special_locate?\n");
|
|
}
|
|
} else {
|
|
if (*locked_tcb == NULL) {
|
|
/*
|
|
* In this case we found the assoc only
|
|
* after we locked the create lock. This
|
|
* means we are in a colliding case and we
|
|
* must make sure that we unlock the tcb if
|
|
* its one of the cases where we throw away
|
|
* the incoming packets.
|
|
*/
|
|
*locked_tcb = *stcb;
|
|
|
|
/*
|
|
* We must also increment the inp ref count
|
|
* since the ref_count flags was set when we
|
|
* did not find the TCB, now we found it
|
|
* which reduces the refcount.. we must
|
|
* raise it back out to balance it all :-)
|
|
*/
|
|
SCTP_INP_INCR_REF((*stcb)->sctp_ep);
|
|
if ((*stcb)->sctp_ep != l_inp) {
|
|
SCTP_PRINTF("Huh? ep:%p diff then l_inp:%p?\n",
|
|
(void *)(*stcb)->sctp_ep, (void *)l_inp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
cookie_len -= SCTP_SIGNATURE_SIZE;
|
|
if (*stcb == NULL) {
|
|
/* this is the "normal" case... get a new TCB */
|
|
*stcb = sctp_process_cookie_new(m, iphlen, offset, src, dst, sh,
|
|
cookie, cookie_len, *inp_p,
|
|
netp, to, ¬ification,
|
|
auth_skipped, auth_offset, auth_len,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
} else {
|
|
/* this is abnormal... cookie-echo on existing TCB */
|
|
had_a_existing_tcb = 1;
|
|
*stcb = sctp_process_cookie_existing(m, iphlen, offset,
|
|
src, dst, sh,
|
|
cookie, cookie_len, *inp_p, *stcb, netp, to,
|
|
¬ification, auth_skipped, auth_offset, auth_len,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
}
|
|
|
|
if (*stcb == NULL) {
|
|
/* still no TCB... must be bad cookie-echo */
|
|
return (NULL);
|
|
}
|
|
if (*netp != NULL) {
|
|
(*netp)->flowtype = mflowtype;
|
|
(*netp)->flowid = mflowid;
|
|
}
|
|
/*
|
|
* Ok, we built an association so confirm the address we sent the
|
|
* INIT-ACK to.
|
|
*/
|
|
netl = sctp_findnet(*stcb, to);
|
|
/*
|
|
* This code should in theory NOT run but
|
|
*/
|
|
if (netl == NULL) {
|
|
/* TSNH! Huh, why do I need to add this address here? */
|
|
if (sctp_add_remote_addr(*stcb, to, NULL, SCTP_DONOT_SETSCOPE, SCTP_IN_COOKIE_PROC)) {
|
|
return (NULL);
|
|
}
|
|
netl = sctp_findnet(*stcb, to);
|
|
}
|
|
if (netl) {
|
|
if (netl->dest_state & SCTP_ADDR_UNCONFIRMED) {
|
|
netl->dest_state &= ~SCTP_ADDR_UNCONFIRMED;
|
|
(void)sctp_set_primary_addr((*stcb), (struct sockaddr *)NULL,
|
|
netl);
|
|
send_int_conf = 1;
|
|
}
|
|
}
|
|
sctp_start_net_timers(*stcb);
|
|
if ((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) {
|
|
if (!had_a_existing_tcb ||
|
|
(((*inp_p)->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0)) {
|
|
/*
|
|
* If we have a NEW cookie or the connect never
|
|
* reached the connected state during collision we
|
|
* must do the TCP accept thing.
|
|
*/
|
|
struct socket *so, *oso;
|
|
struct sctp_inpcb *inp;
|
|
|
|
if (notification == SCTP_NOTIFY_ASSOC_RESTART) {
|
|
/*
|
|
* For a restart we will keep the same
|
|
* socket, no need to do anything. I THINK!!
|
|
*/
|
|
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
if (send_int_conf) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
|
|
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
return (m);
|
|
}
|
|
oso = (*inp_p)->sctp_socket;
|
|
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK((*stcb));
|
|
CURVNET_SET(oso->so_vnet);
|
|
so = sonewconn(oso, 0
|
|
);
|
|
CURVNET_RESTORE();
|
|
SCTP_TCB_LOCK((*stcb));
|
|
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
|
|
|
|
if (so == NULL) {
|
|
struct mbuf *op_err;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *pcb_so;
|
|
|
|
#endif
|
|
/* Too many sockets */
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "process_cookie_new: no room for another socket!\n");
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
|
|
sctp_abort_association(*inp_p, NULL, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
pcb_so = SCTP_INP_SO(*inp_p);
|
|
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK((*stcb));
|
|
SCTP_SOCKET_LOCK(pcb_so, 1);
|
|
SCTP_TCB_LOCK((*stcb));
|
|
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(*inp_p, *stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_23);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(pcb_so, 1);
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
inp = (struct sctp_inpcb *)so->so_pcb;
|
|
SCTP_INP_INCR_REF(inp);
|
|
/*
|
|
* We add the unbound flag here so that if we get an
|
|
* soabort() before we get the move_pcb done, we
|
|
* will properly cleanup.
|
|
*/
|
|
inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
|
|
SCTP_PCB_FLAGS_CONNECTED |
|
|
SCTP_PCB_FLAGS_IN_TCPPOOL |
|
|
SCTP_PCB_FLAGS_UNBOUND |
|
|
(SCTP_PCB_COPY_FLAGS & (*inp_p)->sctp_flags) |
|
|
SCTP_PCB_FLAGS_DONT_WAKE);
|
|
inp->sctp_features = (*inp_p)->sctp_features;
|
|
inp->sctp_mobility_features = (*inp_p)->sctp_mobility_features;
|
|
inp->sctp_socket = so;
|
|
inp->sctp_frag_point = (*inp_p)->sctp_frag_point;
|
|
inp->max_cwnd = (*inp_p)->max_cwnd;
|
|
inp->sctp_cmt_on_off = (*inp_p)->sctp_cmt_on_off;
|
|
inp->ecn_supported = (*inp_p)->ecn_supported;
|
|
inp->prsctp_supported = (*inp_p)->prsctp_supported;
|
|
inp->auth_supported = (*inp_p)->auth_supported;
|
|
inp->asconf_supported = (*inp_p)->asconf_supported;
|
|
inp->reconfig_supported = (*inp_p)->reconfig_supported;
|
|
inp->nrsack_supported = (*inp_p)->nrsack_supported;
|
|
inp->pktdrop_supported = (*inp_p)->pktdrop_supported;
|
|
inp->partial_delivery_point = (*inp_p)->partial_delivery_point;
|
|
inp->sctp_context = (*inp_p)->sctp_context;
|
|
inp->local_strreset_support = (*inp_p)->local_strreset_support;
|
|
inp->fibnum = (*inp_p)->fibnum;
|
|
inp->inp_starting_point_for_iterator = NULL;
|
|
/*
|
|
* copy in the authentication parameters from the
|
|
* original endpoint
|
|
*/
|
|
if (inp->sctp_ep.local_hmacs)
|
|
sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
|
|
inp->sctp_ep.local_hmacs =
|
|
sctp_copy_hmaclist((*inp_p)->sctp_ep.local_hmacs);
|
|
if (inp->sctp_ep.local_auth_chunks)
|
|
sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
|
|
inp->sctp_ep.local_auth_chunks =
|
|
sctp_copy_chunklist((*inp_p)->sctp_ep.local_auth_chunks);
|
|
|
|
/*
|
|
* Now we must move it from one hash table to
|
|
* another and get the tcb in the right place.
|
|
*/
|
|
|
|
/*
|
|
* This is where the one-2-one socket is put into
|
|
* the accept state waiting for the accept!
|
|
*/
|
|
if (*stcb) {
|
|
(*stcb)->asoc.state |= SCTP_STATE_IN_ACCEPT_QUEUE;
|
|
}
|
|
sctp_move_pcb_and_assoc(*inp_p, inp, *stcb);
|
|
|
|
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK((*stcb));
|
|
|
|
sctp_pull_off_control_to_new_inp((*inp_p), inp, *stcb,
|
|
0);
|
|
SCTP_TCB_LOCK((*stcb));
|
|
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
|
|
|
|
|
|
/*
|
|
* now we must check to see if we were aborted while
|
|
* the move was going on and the lock/unlock
|
|
* happened.
|
|
*/
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/*
|
|
* yep it was, we leave the assoc attached
|
|
* to the socket since the sctp_inpcb_free()
|
|
* call will send an abort for us.
|
|
*/
|
|
SCTP_INP_DECR_REF(inp);
|
|
return (NULL);
|
|
}
|
|
SCTP_INP_DECR_REF(inp);
|
|
/* Switch over to the new guy */
|
|
*inp_p = inp;
|
|
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
if (send_int_conf) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
|
|
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
/*
|
|
* Pull it from the incomplete queue and wake the
|
|
* guy
|
|
*/
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
atomic_add_int(&(*stcb)->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK((*stcb));
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
#endif
|
|
soisconnected(so);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_TCB_LOCK((*stcb));
|
|
atomic_subtract_int(&(*stcb)->asoc.refcnt, 1);
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
return (m);
|
|
}
|
|
}
|
|
if (notification) {
|
|
sctp_ulp_notify(notification, *stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (send_int_conf) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_INTERFACE_CONFIRMED,
|
|
(*stcb), 0, (void *)netl, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
return (m);
|
|
}
|
|
|
|
static void
|
|
sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *cp SCTP_UNUSED,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/* cp must not be used, others call this without a c-ack :-) */
|
|
struct sctp_association *asoc;
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_cookie_ack: handling COOKIE-ACK\n");
|
|
if ((stcb == NULL) || (net == NULL)) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
/* process according to association state */
|
|
if (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED) {
|
|
/* state change only needed when I am in right state */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "moving to OPEN state\n");
|
|
SCTP_SET_STATE(asoc, SCTP_STATE_OPEN);
|
|
sctp_start_net_timers(stcb);
|
|
if (asoc->state & SCTP_STATE_SHUTDOWN_PENDING) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD,
|
|
stcb->sctp_ep, stcb, asoc->primary_destination);
|
|
|
|
}
|
|
/* update RTO */
|
|
SCTP_STAT_INCR_COUNTER32(sctps_activeestab);
|
|
SCTP_STAT_INCR_GAUGE32(sctps_currestab);
|
|
if (asoc->overall_error_count == 0) {
|
|
net->RTO = sctp_calculate_rto(stcb, asoc, net,
|
|
&asoc->time_entered, sctp_align_safe_nocopy,
|
|
SCTP_RTT_FROM_NON_DATA);
|
|
}
|
|
(void)SCTP_GETTIME_TIMEVAL(&asoc->time_entered);
|
|
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_UP, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
|
|
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_CONNECTED;
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
if ((stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) == 0) {
|
|
soisconnected(stcb->sctp_socket);
|
|
}
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
/*
|
|
* since we did not send a HB make sure we don't double
|
|
* things
|
|
*/
|
|
net->hb_responded = 1;
|
|
|
|
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
|
|
/*
|
|
* We don't need to do the asconf thing, nor hb or
|
|
* autoclose if the socket is closed.
|
|
*/
|
|
goto closed_socket;
|
|
}
|
|
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, stcb->sctp_ep,
|
|
stcb, net);
|
|
|
|
|
|
if (stcb->asoc.sctp_autoclose_ticks &&
|
|
sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_AUTOCLOSE)) {
|
|
sctp_timer_start(SCTP_TIMER_TYPE_AUTOCLOSE,
|
|
stcb->sctp_ep, stcb, NULL);
|
|
}
|
|
/*
|
|
* send ASCONF if parameters are pending and ASCONFs are
|
|
* allowed (eg. addresses changed when init/cookie echo were
|
|
* in flight)
|
|
*/
|
|
if ((sctp_is_feature_on(stcb->sctp_ep, SCTP_PCB_FLAGS_DO_ASCONF)) &&
|
|
(stcb->asoc.asconf_supported == 1) &&
|
|
(!TAILQ_EMPTY(&stcb->asoc.asconf_queue))) {
|
|
#ifdef SCTP_TIMER_BASED_ASCONF
|
|
sctp_timer_start(SCTP_TIMER_TYPE_ASCONF,
|
|
stcb->sctp_ep, stcb,
|
|
stcb->asoc.primary_destination);
|
|
#else
|
|
sctp_send_asconf(stcb, stcb->asoc.primary_destination,
|
|
SCTP_ADDR_NOT_LOCKED);
|
|
#endif
|
|
}
|
|
}
|
|
closed_socket:
|
|
/* Toss the cookie if I can */
|
|
sctp_toss_old_cookies(stcb, asoc);
|
|
if (!TAILQ_EMPTY(&asoc->sent_queue)) {
|
|
/* Restart the timer if we have pending data */
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
chk = TAILQ_FIRST(&asoc->sent_queue);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_handle_ecn_echo(struct sctp_ecne_chunk *cp,
|
|
struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_nets *net;
|
|
struct sctp_tmit_chunk *lchk;
|
|
struct sctp_ecne_chunk bkup;
|
|
uint8_t override_bit;
|
|
uint32_t tsn, window_data_tsn;
|
|
int len;
|
|
unsigned int pkt_cnt;
|
|
|
|
len = ntohs(cp->ch.chunk_length);
|
|
if ((len != sizeof(struct sctp_ecne_chunk)) &&
|
|
(len != sizeof(struct old_sctp_ecne_chunk))) {
|
|
return;
|
|
}
|
|
if (len == sizeof(struct old_sctp_ecne_chunk)) {
|
|
/* Its the old format */
|
|
memcpy(&bkup, cp, sizeof(struct old_sctp_ecne_chunk));
|
|
bkup.num_pkts_since_cwr = htonl(1);
|
|
cp = &bkup;
|
|
}
|
|
SCTP_STAT_INCR(sctps_recvecne);
|
|
tsn = ntohl(cp->tsn);
|
|
pkt_cnt = ntohl(cp->num_pkts_since_cwr);
|
|
lchk = TAILQ_LAST(&stcb->asoc.send_queue, sctpchunk_listhead);
|
|
if (lchk == NULL) {
|
|
window_data_tsn = stcb->asoc.sending_seq - 1;
|
|
} else {
|
|
window_data_tsn = lchk->rec.data.TSN_seq;
|
|
}
|
|
|
|
/* Find where it was sent to if possible. */
|
|
net = NULL;
|
|
TAILQ_FOREACH(lchk, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (lchk->rec.data.TSN_seq == tsn) {
|
|
net = lchk->whoTo;
|
|
net->ecn_prev_cwnd = lchk->rec.data.cwnd_at_send;
|
|
break;
|
|
}
|
|
if (SCTP_TSN_GT(lchk->rec.data.TSN_seq, tsn)) {
|
|
break;
|
|
}
|
|
}
|
|
if (net == NULL) {
|
|
/*
|
|
* What to do. A previous send of a CWR was possibly lost.
|
|
* See how old it is, we may have it marked on the actual
|
|
* net.
|
|
*/
|
|
TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
|
|
if (tsn == net->last_cwr_tsn) {
|
|
/* Found him, send it off */
|
|
break;
|
|
}
|
|
}
|
|
if (net == NULL) {
|
|
/*
|
|
* If we reach here, we need to send a special CWR
|
|
* that says hey, we did this a long time ago and
|
|
* you lost the response.
|
|
*/
|
|
net = TAILQ_FIRST(&stcb->asoc.nets);
|
|
if (net == NULL) {
|
|
/* TSNH */
|
|
return;
|
|
}
|
|
override_bit = SCTP_CWR_REDUCE_OVERRIDE;
|
|
} else {
|
|
override_bit = 0;
|
|
}
|
|
} else {
|
|
override_bit = 0;
|
|
}
|
|
if (SCTP_TSN_GT(tsn, net->cwr_window_tsn) &&
|
|
((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
|
|
/*
|
|
* JRS - Use the congestion control given in the pluggable
|
|
* CC module
|
|
*/
|
|
stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 0, pkt_cnt);
|
|
/*
|
|
* We reduce once every RTT. So we will only lower cwnd at
|
|
* the next sending seq i.e. the window_data_tsn
|
|
*/
|
|
net->cwr_window_tsn = window_data_tsn;
|
|
net->ecn_ce_pkt_cnt += pkt_cnt;
|
|
net->lost_cnt = pkt_cnt;
|
|
net->last_cwr_tsn = tsn;
|
|
} else {
|
|
override_bit |= SCTP_CWR_IN_SAME_WINDOW;
|
|
if (SCTP_TSN_GT(tsn, net->last_cwr_tsn) &&
|
|
((override_bit & SCTP_CWR_REDUCE_OVERRIDE) == 0)) {
|
|
/*
|
|
* Another loss in the same window update how many
|
|
* marks/packets lost we have had.
|
|
*/
|
|
int cnt = 1;
|
|
|
|
if (pkt_cnt > net->lost_cnt) {
|
|
/* Should be the case */
|
|
cnt = (pkt_cnt - net->lost_cnt);
|
|
net->ecn_ce_pkt_cnt += cnt;
|
|
}
|
|
net->lost_cnt = pkt_cnt;
|
|
net->last_cwr_tsn = tsn;
|
|
/*
|
|
* Most CC functions will ignore this call, since we
|
|
* are in-window yet of the initial CE the peer saw.
|
|
*/
|
|
stcb->asoc.cc_functions.sctp_cwnd_update_after_ecn_echo(stcb, net, 1, cnt);
|
|
}
|
|
}
|
|
/*
|
|
* We always send a CWR this way if our previous one was lost our
|
|
* peer will get an update, or if it is not time again to reduce we
|
|
* still get the cwr to the peer. Note we set the override when we
|
|
* could not find the TSN on the chunk or the destination network.
|
|
*/
|
|
sctp_send_cwr(stcb, net, net->last_cwr_tsn, override_bit);
|
|
}
|
|
|
|
static void
|
|
sctp_handle_ecn_cwr(struct sctp_cwr_chunk *cp, struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
/*
|
|
* Here we get a CWR from the peer. We must look in the outqueue and
|
|
* make sure that we have a covered ECNE in the control chunk part.
|
|
* If so remove it.
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_ecne_chunk *ecne;
|
|
int override;
|
|
uint32_t cwr_tsn;
|
|
|
|
cwr_tsn = ntohl(cp->tsn);
|
|
override = cp->ch.chunk_flags & SCTP_CWR_REDUCE_OVERRIDE;
|
|
TAILQ_FOREACH(chk, &stcb->asoc.control_send_queue, sctp_next) {
|
|
if (chk->rec.chunk_id.id != SCTP_ECN_ECHO) {
|
|
continue;
|
|
}
|
|
if ((override == 0) && (chk->whoTo != net)) {
|
|
/* Must be from the right src unless override is set */
|
|
continue;
|
|
}
|
|
ecne = mtod(chk->data, struct sctp_ecne_chunk *);
|
|
if (SCTP_TSN_GE(cwr_tsn, ntohl(ecne->tsn))) {
|
|
/* this covers this ECNE, we can remove it */
|
|
stcb->asoc.ecn_echo_cnt_onq--;
|
|
TAILQ_REMOVE(&stcb->asoc.control_send_queue, chk,
|
|
sctp_next);
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
stcb->asoc.ctrl_queue_cnt--;
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
if (override == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_handle_shutdown_complete(struct sctp_shutdown_complete_chunk *cp SCTP_UNUSED,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_shutdown_complete: handling SHUTDOWN-COMPLETE\n");
|
|
if (stcb == NULL)
|
|
return;
|
|
|
|
asoc = &stcb->asoc;
|
|
/* process according to association state */
|
|
if (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
/* unexpected SHUTDOWN-COMPLETE... so ignore... */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_shutdown_complete: not in SCTP_STATE_SHUTDOWN_ACK_SENT --- ignore\n");
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
return;
|
|
}
|
|
/* notify upper layer protocol */
|
|
if (stcb->sctp_socket) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_DOWN, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
#ifdef INVARIANTS
|
|
if (!TAILQ_EMPTY(&asoc->send_queue) ||
|
|
!TAILQ_EMPTY(&asoc->sent_queue) ||
|
|
!stcb->asoc.ss_functions.sctp_ss_is_empty(stcb, asoc)) {
|
|
panic("Queues are not empty when handling SHUTDOWN-COMPLETE");
|
|
}
|
|
#endif
|
|
/* stop the timer */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SHUTDOWNACK, stcb->sctp_ep, stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_24);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_shutdown);
|
|
/* free the TCB */
|
|
SCTPDBG(SCTP_DEBUG_INPUT2,
|
|
"sctp_handle_shutdown_complete: calls free-asoc\n");
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(stcb->sctp_ep);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(stcb->sctp_ep, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_25);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
static int
|
|
process_chunk_drop(struct sctp_tcb *stcb, struct sctp_chunk_desc *desc,
|
|
struct sctp_nets *net, uint8_t flg)
|
|
{
|
|
switch (desc->chunk_type) {
|
|
case SCTP_DATA:
|
|
/* find the tsn to resend (possibly */
|
|
{
|
|
uint32_t tsn;
|
|
struct sctp_tmit_chunk *tp1;
|
|
|
|
tsn = ntohl(desc->tsn_ifany);
|
|
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (tp1->rec.data.TSN_seq == tsn) {
|
|
/* found it */
|
|
break;
|
|
}
|
|
if (SCTP_TSN_GT(tp1->rec.data.TSN_seq, tsn)) {
|
|
/* not found */
|
|
tp1 = NULL;
|
|
break;
|
|
}
|
|
}
|
|
if (tp1 == NULL) {
|
|
/*
|
|
* Do it the other way , aka without paying
|
|
* attention to queue seq order.
|
|
*/
|
|
SCTP_STAT_INCR(sctps_pdrpdnfnd);
|
|
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (tp1->rec.data.TSN_seq == tsn) {
|
|
/* found it */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (tp1 == NULL) {
|
|
SCTP_STAT_INCR(sctps_pdrptsnnf);
|
|
}
|
|
if ((tp1) && (tp1->sent < SCTP_DATAGRAM_ACKED)) {
|
|
uint8_t *ddp;
|
|
|
|
if (((flg & SCTP_BADCRC) == 0) &&
|
|
((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
|
|
return (0);
|
|
}
|
|
if ((stcb->asoc.peers_rwnd == 0) &&
|
|
((flg & SCTP_FROM_MIDDLE_BOX) == 0)) {
|
|
SCTP_STAT_INCR(sctps_pdrpdiwnp);
|
|
return (0);
|
|
}
|
|
if (stcb->asoc.peers_rwnd == 0 &&
|
|
(flg & SCTP_FROM_MIDDLE_BOX)) {
|
|
SCTP_STAT_INCR(sctps_pdrpdizrw);
|
|
return (0);
|
|
}
|
|
ddp = (uint8_t *) (mtod(tp1->data, caddr_t)+
|
|
sizeof(struct sctp_data_chunk));
|
|
{
|
|
unsigned int iii;
|
|
|
|
for (iii = 0; iii < sizeof(desc->data_bytes);
|
|
iii++) {
|
|
if (ddp[iii] != desc->data_bytes[iii]) {
|
|
SCTP_STAT_INCR(sctps_pdrpbadd);
|
|
return (-1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tp1->do_rtt) {
|
|
/*
|
|
* this guy had a RTO calculation
|
|
* pending on it, cancel it
|
|
*/
|
|
if (tp1->whoTo->rto_needed == 0) {
|
|
tp1->whoTo->rto_needed = 1;
|
|
}
|
|
tp1->do_rtt = 0;
|
|
}
|
|
SCTP_STAT_INCR(sctps_pdrpmark);
|
|
if (tp1->sent != SCTP_DATAGRAM_RESEND)
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
/*
|
|
* mark it as if we were doing a FR, since
|
|
* we will be getting gap ack reports behind
|
|
* the info from the router.
|
|
*/
|
|
tp1->rec.data.doing_fast_retransmit = 1;
|
|
/*
|
|
* mark the tsn with what sequences can
|
|
* cause a new FR.
|
|
*/
|
|
if (TAILQ_EMPTY(&stcb->asoc.send_queue)) {
|
|
tp1->rec.data.fast_retran_tsn = stcb->asoc.sending_seq;
|
|
} else {
|
|
tp1->rec.data.fast_retran_tsn = (TAILQ_FIRST(&stcb->asoc.send_queue))->rec.data.TSN_seq;
|
|
}
|
|
|
|
/* restart the timer */
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
|
|
stcb, tp1->whoTo,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_26);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep,
|
|
stcb, tp1->whoTo);
|
|
|
|
/* fix counts and things */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_FLIGHT_LOGGING_ENABLE) {
|
|
sctp_misc_ints(SCTP_FLIGHT_LOG_DOWN_PDRP,
|
|
tp1->whoTo->flight_size,
|
|
tp1->book_size,
|
|
(uintptr_t) stcb,
|
|
tp1->rec.data.TSN_seq);
|
|
}
|
|
if (tp1->sent < SCTP_DATAGRAM_RESEND) {
|
|
sctp_flight_size_decrease(tp1);
|
|
sctp_total_flight_decrease(stcb, tp1);
|
|
}
|
|
tp1->sent = SCTP_DATAGRAM_RESEND;
|
|
} {
|
|
/* audit code */
|
|
unsigned int audit;
|
|
|
|
audit = 0;
|
|
TAILQ_FOREACH(tp1, &stcb->asoc.sent_queue, sctp_next) {
|
|
if (tp1->sent == SCTP_DATAGRAM_RESEND)
|
|
audit++;
|
|
}
|
|
TAILQ_FOREACH(tp1, &stcb->asoc.control_send_queue,
|
|
sctp_next) {
|
|
if (tp1->sent == SCTP_DATAGRAM_RESEND)
|
|
audit++;
|
|
}
|
|
if (audit != stcb->asoc.sent_queue_retran_cnt) {
|
|
SCTP_PRINTF("**Local Audit finds cnt:%d asoc cnt:%d\n",
|
|
audit, stcb->asoc.sent_queue_retran_cnt);
|
|
#ifndef SCTP_AUDITING_ENABLED
|
|
stcb->asoc.sent_queue_retran_cnt = audit;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case SCTP_ASCONF:
|
|
{
|
|
struct sctp_tmit_chunk *asconf;
|
|
|
|
TAILQ_FOREACH(asconf, &stcb->asoc.control_send_queue,
|
|
sctp_next) {
|
|
if (asconf->rec.chunk_id.id == SCTP_ASCONF) {
|
|
break;
|
|
}
|
|
}
|
|
if (asconf) {
|
|
if (asconf->sent != SCTP_DATAGRAM_RESEND)
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
asconf->sent = SCTP_DATAGRAM_RESEND;
|
|
asconf->snd_count--;
|
|
}
|
|
}
|
|
break;
|
|
case SCTP_INITIATION:
|
|
/* resend the INIT */
|
|
stcb->asoc.dropped_special_cnt++;
|
|
if (stcb->asoc.dropped_special_cnt < SCTP_RETRY_DROPPED_THRESH) {
|
|
/*
|
|
* If we can get it in, in a few attempts we do
|
|
* this, otherwise we let the timer fire.
|
|
*/
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_INIT, stcb->sctp_ep,
|
|
stcb, net,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_27);
|
|
sctp_send_initiate(stcb->sctp_ep, stcb, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
break;
|
|
case SCTP_SELECTIVE_ACK:
|
|
case SCTP_NR_SELECTIVE_ACK:
|
|
/* resend the sack */
|
|
sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
|
|
break;
|
|
case SCTP_HEARTBEAT_REQUEST:
|
|
/* resend a demand HB */
|
|
if ((stcb->asoc.overall_error_count + 3) < stcb->asoc.max_send_times) {
|
|
/*
|
|
* Only retransmit if we KNOW we wont destroy the
|
|
* tcb
|
|
*/
|
|
sctp_send_hb(stcb, net, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
break;
|
|
case SCTP_SHUTDOWN:
|
|
sctp_send_shutdown(stcb, net);
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK:
|
|
sctp_send_shutdown_ack(stcb, net);
|
|
break;
|
|
case SCTP_COOKIE_ECHO:
|
|
{
|
|
struct sctp_tmit_chunk *cookie;
|
|
|
|
cookie = NULL;
|
|
TAILQ_FOREACH(cookie, &stcb->asoc.control_send_queue,
|
|
sctp_next) {
|
|
if (cookie->rec.chunk_id.id == SCTP_COOKIE_ECHO) {
|
|
break;
|
|
}
|
|
}
|
|
if (cookie) {
|
|
if (cookie->sent != SCTP_DATAGRAM_RESEND)
|
|
sctp_ucount_incr(stcb->asoc.sent_queue_retran_cnt);
|
|
cookie->sent = SCTP_DATAGRAM_RESEND;
|
|
sctp_stop_all_cookie_timers(stcb);
|
|
}
|
|
}
|
|
break;
|
|
case SCTP_COOKIE_ACK:
|
|
sctp_send_cookie_ack(stcb);
|
|
break;
|
|
case SCTP_ASCONF_ACK:
|
|
/* resend last asconf ack */
|
|
sctp_send_asconf_ack(stcb);
|
|
break;
|
|
case SCTP_FORWARD_CUM_TSN:
|
|
send_forward_tsn(stcb, &stcb->asoc);
|
|
break;
|
|
/* can't do anything with these */
|
|
case SCTP_PACKET_DROPPED:
|
|
case SCTP_INITIATION_ACK: /* this should not happen */
|
|
case SCTP_HEARTBEAT_ACK:
|
|
case SCTP_ABORT_ASSOCIATION:
|
|
case SCTP_OPERATION_ERROR:
|
|
case SCTP_SHUTDOWN_COMPLETE:
|
|
case SCTP_ECN_ECHO:
|
|
case SCTP_ECN_CWR:
|
|
default:
|
|
break;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
sctp_reset_in_stream(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
|
|
{
|
|
uint32_t i;
|
|
uint16_t temp;
|
|
|
|
/*
|
|
* We set things to 0xffff since this is the last delivered sequence
|
|
* and we will be sending in 0 after the reset.
|
|
*/
|
|
|
|
if (number_entries) {
|
|
for (i = 0; i < number_entries; i++) {
|
|
temp = ntohs(list[i]);
|
|
if (temp >= stcb->asoc.streamincnt) {
|
|
continue;
|
|
}
|
|
stcb->asoc.strmin[temp].last_sequence_delivered = 0xffff;
|
|
}
|
|
} else {
|
|
list = NULL;
|
|
for (i = 0; i < stcb->asoc.streamincnt; i++) {
|
|
stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
|
|
}
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_RECV, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
|
|
static void
|
|
sctp_reset_out_streams(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
|
|
{
|
|
uint32_t i;
|
|
uint16_t temp;
|
|
|
|
if (number_entries > 0) {
|
|
for (i = 0; i < number_entries; i++) {
|
|
temp = ntohs(list[i]);
|
|
if (temp >= stcb->asoc.streamoutcnt) {
|
|
/* no such stream */
|
|
continue;
|
|
}
|
|
stcb->asoc.strmout[temp].next_sequence_send = 0;
|
|
}
|
|
} else {
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
stcb->asoc.strmout[i].next_sequence_send = 0;
|
|
}
|
|
}
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_SEND, stcb, number_entries, (void *)list, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
|
|
static void
|
|
sctp_reset_clear_pending(struct sctp_tcb *stcb, uint32_t number_entries, uint16_t * list)
|
|
{
|
|
uint32_t i;
|
|
uint16_t temp;
|
|
|
|
if (number_entries > 0) {
|
|
for (i = 0; i < number_entries; i++) {
|
|
temp = ntohs(list[i]);
|
|
if (temp >= stcb->asoc.streamoutcnt) {
|
|
/* no such stream */
|
|
continue;
|
|
}
|
|
stcb->asoc.strmout[temp].state = SCTP_STREAM_OPEN;
|
|
}
|
|
} else {
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_OPEN;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
struct sctp_stream_reset_request *
|
|
sctp_find_stream_reset(struct sctp_tcb *stcb, uint32_t seq, struct sctp_tmit_chunk **bchk)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_chunkhdr *ch;
|
|
struct sctp_stream_reset_request *r;
|
|
struct sctp_tmit_chunk *chk;
|
|
int len, clen;
|
|
|
|
asoc = &stcb->asoc;
|
|
if (TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
|
|
asoc->stream_reset_outstanding = 0;
|
|
return (NULL);
|
|
}
|
|
if (stcb->asoc.str_reset == NULL) {
|
|
asoc->stream_reset_outstanding = 0;
|
|
return (NULL);
|
|
}
|
|
chk = stcb->asoc.str_reset;
|
|
if (chk->data == NULL) {
|
|
return (NULL);
|
|
}
|
|
if (bchk) {
|
|
/* he wants a copy of the chk pointer */
|
|
*bchk = chk;
|
|
}
|
|
clen = chk->send_size;
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
r = (struct sctp_stream_reset_request *)(ch + 1);
|
|
if (ntohl(r->request_seq) == seq) {
|
|
/* found it */
|
|
return (r);
|
|
}
|
|
len = SCTP_SIZE32(ntohs(r->ph.param_length));
|
|
if (clen > (len + (int)sizeof(struct sctp_chunkhdr))) {
|
|
/* move to the next one, there can only be a max of two */
|
|
r = (struct sctp_stream_reset_request *)((caddr_t)r + len);
|
|
if (ntohl(r->request_seq) == seq) {
|
|
return (r);
|
|
}
|
|
}
|
|
/* that seq is not here */
|
|
return (NULL);
|
|
}
|
|
|
|
static void
|
|
sctp_clean_up_stream_reset(struct sctp_tcb *stcb)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_tmit_chunk *chk = stcb->asoc.str_reset;
|
|
|
|
if (stcb->asoc.str_reset == NULL) {
|
|
return;
|
|
}
|
|
asoc = &stcb->asoc;
|
|
|
|
sctp_timer_stop(SCTP_TIMER_TYPE_STRRESET, stcb->sctp_ep, stcb,
|
|
chk->whoTo, SCTP_FROM_SCTP_INPUT + SCTP_LOC_28);
|
|
TAILQ_REMOVE(&asoc->control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
asoc->ctrl_queue_cnt--;
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
/* sa_ignore NO_NULL_CHK */
|
|
stcb->asoc.str_reset = NULL;
|
|
}
|
|
|
|
|
|
static int
|
|
sctp_handle_stream_reset_response(struct sctp_tcb *stcb,
|
|
uint32_t seq, uint32_t action,
|
|
struct sctp_stream_reset_response *respin)
|
|
{
|
|
uint16_t type;
|
|
int lparm_len;
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_stream_reset_request *req_param;
|
|
struct sctp_stream_reset_out_request *req_out_param;
|
|
struct sctp_stream_reset_in_request *req_in_param;
|
|
uint32_t number_entries;
|
|
|
|
if (asoc->stream_reset_outstanding == 0) {
|
|
/* duplicate */
|
|
return (0);
|
|
}
|
|
if (seq == stcb->asoc.str_reset_seq_out) {
|
|
req_param = sctp_find_stream_reset(stcb, seq, &chk);
|
|
if (req_param != NULL) {
|
|
stcb->asoc.str_reset_seq_out++;
|
|
type = ntohs(req_param->ph.param_type);
|
|
lparm_len = ntohs(req_param->ph.param_length);
|
|
if (type == SCTP_STR_RESET_OUT_REQUEST) {
|
|
int no_clear = 0;
|
|
|
|
req_out_param = (struct sctp_stream_reset_out_request *)req_param;
|
|
number_entries = (lparm_len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t);
|
|
asoc->stream_reset_out_is_outstanding = 0;
|
|
if (asoc->stream_reset_outstanding)
|
|
asoc->stream_reset_outstanding--;
|
|
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
|
|
/* do it */
|
|
sctp_reset_out_streams(stcb, number_entries, req_out_param->list_of_streams);
|
|
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
|
|
} else if (action == SCTP_STREAM_RESET_RESULT_IN_PROGRESS) {
|
|
/*
|
|
* Set it up so we don't stop
|
|
* retransmitting
|
|
*/
|
|
asoc->stream_reset_outstanding++;
|
|
stcb->asoc.str_reset_seq_out--;
|
|
asoc->stream_reset_out_is_outstanding = 1;
|
|
no_clear = 1;
|
|
} else {
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_OUT, stcb, number_entries, req_out_param->list_of_streams, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (no_clear == 0) {
|
|
sctp_reset_clear_pending(stcb, number_entries, req_out_param->list_of_streams);
|
|
}
|
|
} else if (type == SCTP_STR_RESET_IN_REQUEST) {
|
|
req_in_param = (struct sctp_stream_reset_in_request *)req_param;
|
|
number_entries = (lparm_len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t);
|
|
if (asoc->stream_reset_outstanding)
|
|
asoc->stream_reset_outstanding--;
|
|
if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_DENIED_IN, stcb,
|
|
number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
|
|
} else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_STR_RESET_FAILED_IN, stcb,
|
|
number_entries, req_in_param->list_of_streams, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
} else if (type == SCTP_STR_RESET_ADD_OUT_STREAMS) {
|
|
/* Ok we now may have more streams */
|
|
int num_stream;
|
|
|
|
num_stream = stcb->asoc.strm_pending_add_size;
|
|
if (num_stream > (stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt)) {
|
|
/* TSNH */
|
|
num_stream = stcb->asoc.strm_realoutsize - stcb->asoc.streamoutcnt;
|
|
}
|
|
stcb->asoc.strm_pending_add_size = 0;
|
|
if (asoc->stream_reset_outstanding)
|
|
asoc->stream_reset_outstanding--;
|
|
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
|
|
/* Put the new streams into effect */
|
|
int i;
|
|
|
|
for (i = asoc->streamoutcnt; i < (asoc->streamoutcnt + num_stream); i++) {
|
|
asoc->strmout[i].state = SCTP_STREAM_OPEN;
|
|
}
|
|
asoc->streamoutcnt += num_stream;
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
|
|
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
|
|
SCTP_STREAM_CHANGE_DENIED);
|
|
} else {
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
|
|
SCTP_STREAM_CHANGE_FAILED);
|
|
}
|
|
} else if (type == SCTP_STR_RESET_ADD_IN_STREAMS) {
|
|
if (asoc->stream_reset_outstanding)
|
|
asoc->stream_reset_outstanding--;
|
|
if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
|
|
SCTP_STREAM_CHANGE_DENIED);
|
|
} else if (action != SCTP_STREAM_RESET_RESULT_PERFORMED) {
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt,
|
|
SCTP_STREAM_CHANGE_FAILED);
|
|
}
|
|
} else if (type == SCTP_STR_RESET_TSN_REQUEST) {
|
|
/**
|
|
* a) Adopt the new in tsn.
|
|
* b) reset the map
|
|
* c) Adopt the new out-tsn
|
|
*/
|
|
struct sctp_stream_reset_response_tsn *resp;
|
|
struct sctp_forward_tsn_chunk fwdtsn;
|
|
int abort_flag = 0;
|
|
|
|
if (respin == NULL) {
|
|
/* huh ? */
|
|
return (0);
|
|
}
|
|
if (ntohs(respin->ph.param_length) < sizeof(struct sctp_stream_reset_response_tsn)) {
|
|
return (0);
|
|
}
|
|
if (action == SCTP_STREAM_RESET_RESULT_PERFORMED) {
|
|
resp = (struct sctp_stream_reset_response_tsn *)respin;
|
|
asoc->stream_reset_outstanding--;
|
|
fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
|
|
fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
|
|
fwdtsn.new_cumulative_tsn = htonl(ntohl(resp->senders_next_tsn) - 1);
|
|
sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
|
|
if (abort_flag) {
|
|
return (1);
|
|
}
|
|
stcb->asoc.highest_tsn_inside_map = (ntohl(resp->senders_next_tsn) - 1);
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
|
|
sctp_log_map(0, 7, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
|
|
}
|
|
stcb->asoc.tsn_last_delivered = stcb->asoc.cumulative_tsn = stcb->asoc.highest_tsn_inside_map;
|
|
stcb->asoc.mapping_array_base_tsn = ntohl(resp->senders_next_tsn);
|
|
memset(stcb->asoc.mapping_array, 0, stcb->asoc.mapping_array_size);
|
|
|
|
stcb->asoc.highest_tsn_inside_nr_map = stcb->asoc.highest_tsn_inside_map;
|
|
memset(stcb->asoc.nr_mapping_array, 0, stcb->asoc.mapping_array_size);
|
|
|
|
stcb->asoc.sending_seq = ntohl(resp->receivers_next_tsn);
|
|
stcb->asoc.last_acked_seq = stcb->asoc.cumulative_tsn;
|
|
|
|
sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
|
|
sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
|
|
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1), 0);
|
|
} else if (action == SCTP_STREAM_RESET_RESULT_DENIED) {
|
|
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
|
|
SCTP_ASSOC_RESET_DENIED);
|
|
} else {
|
|
sctp_notify_stream_reset_tsn(stcb, stcb->asoc.sending_seq, (stcb->asoc.mapping_array_base_tsn + 1),
|
|
SCTP_ASSOC_RESET_FAILED);
|
|
}
|
|
}
|
|
/* get rid of the request and get the request flags */
|
|
if (asoc->stream_reset_outstanding == 0) {
|
|
sctp_clean_up_stream_reset(stcb);
|
|
}
|
|
}
|
|
}
|
|
if (asoc->stream_reset_outstanding == 0) {
|
|
sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sctp_handle_str_reset_request_in(struct sctp_tcb *stcb,
|
|
struct sctp_tmit_chunk *chk,
|
|
struct sctp_stream_reset_in_request *req, int trunc)
|
|
{
|
|
uint32_t seq;
|
|
int len, i;
|
|
int number_entries;
|
|
uint16_t temp;
|
|
|
|
/*
|
|
* peer wants me to send a str-reset to him for my outgoing seq's if
|
|
* seq_in is right.
|
|
*/
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
|
|
seq = ntohl(req->request_seq);
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
asoc->last_reset_action[1] = asoc->last_reset_action[0];
|
|
if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if (trunc) {
|
|
/* Can't do it, since they exceeded our buffer size */
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if (stcb->asoc.stream_reset_out_is_outstanding == 0) {
|
|
len = ntohs(req->ph.param_length);
|
|
number_entries = ((len - sizeof(struct sctp_stream_reset_in_request)) / sizeof(uint16_t));
|
|
if (number_entries) {
|
|
for (i = 0; i < number_entries; i++) {
|
|
temp = ntohs(req->list_of_streams[i]);
|
|
if (temp >= stcb->asoc.streamoutcnt) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
goto bad_boy;
|
|
}
|
|
req->list_of_streams[i] = temp;
|
|
}
|
|
for (i = 0; i < number_entries; i++) {
|
|
if (stcb->asoc.strmout[req->list_of_streams[i]].state == SCTP_STREAM_OPEN) {
|
|
stcb->asoc.strmout[req->list_of_streams[i]].state = SCTP_STREAM_RESET_PENDING;
|
|
}
|
|
}
|
|
} else {
|
|
/* Its all */
|
|
for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
|
|
if (stcb->asoc.strmout[i].state == SCTP_STREAM_OPEN)
|
|
stcb->asoc.strmout[i].state = SCTP_STREAM_RESET_PENDING;
|
|
}
|
|
}
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
|
|
} else {
|
|
/* Can't do it, since we have sent one out */
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
|
|
}
|
|
bad_boy:
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
asoc->str_reset_seq_in++;
|
|
} else if (asoc->str_reset_seq_in - 1 == seq) {
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
} else if (asoc->str_reset_seq_in - 2 == seq) {
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
|
|
} else {
|
|
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
|
|
}
|
|
sctp_send_stream_reset_out_if_possible(stcb, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
|
|
static int
|
|
sctp_handle_str_reset_request_tsn(struct sctp_tcb *stcb,
|
|
struct sctp_tmit_chunk *chk,
|
|
struct sctp_stream_reset_tsn_request *req)
|
|
{
|
|
/* reset all in and out and update the tsn */
|
|
/*
|
|
* A) reset my str-seq's on in and out. B) Select a receive next,
|
|
* and set cum-ack to it. Also process this selected number as a
|
|
* fwd-tsn as well. C) set in the response my next sending seq.
|
|
*/
|
|
struct sctp_forward_tsn_chunk fwdtsn;
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
int abort_flag = 0;
|
|
uint32_t seq;
|
|
|
|
seq = ntohl(req->request_seq);
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
asoc->last_reset_action[1] = stcb->asoc.last_reset_action[0];
|
|
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else {
|
|
fwdtsn.ch.chunk_length = htons(sizeof(struct sctp_forward_tsn_chunk));
|
|
fwdtsn.ch.chunk_type = SCTP_FORWARD_CUM_TSN;
|
|
fwdtsn.ch.chunk_flags = 0;
|
|
fwdtsn.new_cumulative_tsn = htonl(stcb->asoc.highest_tsn_inside_map + 1);
|
|
sctp_handle_forward_tsn(stcb, &fwdtsn, &abort_flag, NULL, 0);
|
|
if (abort_flag) {
|
|
return (1);
|
|
}
|
|
asoc->highest_tsn_inside_map += SCTP_STREAM_RESET_TSN_DELTA;
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) {
|
|
sctp_log_map(0, 10, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT);
|
|
}
|
|
asoc->tsn_last_delivered = asoc->cumulative_tsn = asoc->highest_tsn_inside_map;
|
|
asoc->mapping_array_base_tsn = asoc->highest_tsn_inside_map + 1;
|
|
memset(asoc->mapping_array, 0, asoc->mapping_array_size);
|
|
asoc->highest_tsn_inside_nr_map = asoc->highest_tsn_inside_map;
|
|
memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
|
|
atomic_add_int(&asoc->sending_seq, 1);
|
|
/* save off historical data for retrans */
|
|
asoc->last_sending_seq[1] = asoc->last_sending_seq[0];
|
|
asoc->last_sending_seq[0] = asoc->sending_seq;
|
|
asoc->last_base_tsnsent[1] = asoc->last_base_tsnsent[0];
|
|
asoc->last_base_tsnsent[0] = asoc->mapping_array_base_tsn;
|
|
sctp_reset_out_streams(stcb, 0, (uint16_t *) NULL);
|
|
sctp_reset_in_stream(stcb, 0, (uint16_t *) NULL);
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
|
|
sctp_notify_stream_reset_tsn(stcb, asoc->sending_seq, (asoc->mapping_array_base_tsn + 1), 0);
|
|
}
|
|
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
|
|
asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
|
|
asoc->str_reset_seq_in++;
|
|
} else if (asoc->str_reset_seq_in - 1 == seq) {
|
|
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[0],
|
|
asoc->last_sending_seq[0], asoc->last_base_tsnsent[0]);
|
|
} else if (asoc->str_reset_seq_in - 2 == seq) {
|
|
sctp_add_stream_reset_result_tsn(chk, seq, asoc->last_reset_action[1],
|
|
asoc->last_sending_seq[1], asoc->last_base_tsnsent[1]);
|
|
} else {
|
|
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sctp_handle_str_reset_request_out(struct sctp_tcb *stcb,
|
|
struct sctp_tmit_chunk *chk,
|
|
struct sctp_stream_reset_out_request *req, int trunc)
|
|
{
|
|
uint32_t seq, tsn;
|
|
int number_entries, len;
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
|
|
seq = ntohl(req->request_seq);
|
|
|
|
/* now if its not a duplicate we process it */
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
len = ntohs(req->ph.param_length);
|
|
number_entries = ((len - sizeof(struct sctp_stream_reset_out_request)) / sizeof(uint16_t));
|
|
/*
|
|
* the sender is resetting, handle the list issue.. we must
|
|
* a) verify if we can do the reset, if so no problem b) If
|
|
* we can't do the reset we must copy the request. c) queue
|
|
* it, and setup the data in processor to trigger it off
|
|
* when needed and dequeue all the queued data.
|
|
*/
|
|
tsn = ntohl(req->send_reset_at_tsn);
|
|
|
|
/* move the reset action back one */
|
|
asoc->last_reset_action[1] = asoc->last_reset_action[0];
|
|
if (!(asoc->local_strreset_support & SCTP_ENABLE_RESET_STREAM_REQ)) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if (trunc) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if (SCTP_TSN_GE(asoc->cumulative_tsn, tsn)) {
|
|
/* we can do it now */
|
|
sctp_reset_in_stream(stcb, number_entries, req->list_of_streams);
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
|
|
} else {
|
|
/*
|
|
* we must queue it up and thus wait for the TSN's
|
|
* to arrive that are at or before tsn
|
|
*/
|
|
struct sctp_stream_reset_list *liste;
|
|
int siz;
|
|
|
|
siz = sizeof(struct sctp_stream_reset_list) + (number_entries * sizeof(uint16_t));
|
|
SCTP_MALLOC(liste, struct sctp_stream_reset_list *,
|
|
siz, SCTP_M_STRESET);
|
|
if (liste == NULL) {
|
|
/* gak out of memory */
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
return;
|
|
}
|
|
liste->seq = seq;
|
|
liste->tsn = tsn;
|
|
liste->number_entries = number_entries;
|
|
memcpy(&liste->list_of_streams, req->list_of_streams, number_entries * sizeof(uint16_t));
|
|
TAILQ_INSERT_TAIL(&asoc->resetHead, liste, next_resp);
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_IN_PROGRESS;
|
|
}
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
asoc->str_reset_seq_in++;
|
|
} else if ((asoc->str_reset_seq_in - 1) == seq) {
|
|
/*
|
|
* one seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
} else if ((asoc->str_reset_seq_in - 2) == seq) {
|
|
/*
|
|
* two seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
|
|
} else {
|
|
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_handle_str_reset_add_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
|
|
struct sctp_stream_reset_add_strm *str_add)
|
|
{
|
|
/*
|
|
* Peer is requesting to add more streams. If its within our
|
|
* max-streams we will allow it.
|
|
*/
|
|
uint32_t num_stream, i;
|
|
uint32_t seq;
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
struct sctp_queued_to_read *ctl, *nctl;
|
|
|
|
/* Get the number. */
|
|
seq = ntohl(str_add->request_seq);
|
|
num_stream = ntohs(str_add->number_of_streams);
|
|
/* Now what would be the new total? */
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
num_stream += stcb->asoc.streamincnt;
|
|
stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
|
|
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if ((num_stream > stcb->asoc.max_inbound_streams) ||
|
|
(num_stream > 0xffff)) {
|
|
/* We must reject it they ask for to many */
|
|
denied:
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else {
|
|
/* Ok, we can do that :-) */
|
|
struct sctp_stream_in *oldstrm;
|
|
|
|
/* save off the old */
|
|
oldstrm = stcb->asoc.strmin;
|
|
SCTP_MALLOC(stcb->asoc.strmin, struct sctp_stream_in *,
|
|
(num_stream * sizeof(struct sctp_stream_in)),
|
|
SCTP_M_STRMI);
|
|
if (stcb->asoc.strmin == NULL) {
|
|
stcb->asoc.strmin = oldstrm;
|
|
goto denied;
|
|
}
|
|
/* copy off the old data */
|
|
for (i = 0; i < stcb->asoc.streamincnt; i++) {
|
|
TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
|
|
stcb->asoc.strmin[i].stream_no = i;
|
|
stcb->asoc.strmin[i].last_sequence_delivered = oldstrm[i].last_sequence_delivered;
|
|
stcb->asoc.strmin[i].delivery_started = oldstrm[i].delivery_started;
|
|
/* now anything on those queues? */
|
|
TAILQ_FOREACH_SAFE(ctl, &oldstrm[i].inqueue, next, nctl) {
|
|
TAILQ_REMOVE(&oldstrm[i].inqueue, ctl, next);
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.strmin[i].inqueue, ctl, next);
|
|
}
|
|
}
|
|
/* Init the new streams */
|
|
for (i = stcb->asoc.streamincnt; i < num_stream; i++) {
|
|
TAILQ_INIT(&stcb->asoc.strmin[i].inqueue);
|
|
stcb->asoc.strmin[i].stream_no = i;
|
|
stcb->asoc.strmin[i].last_sequence_delivered = 0xffff;
|
|
stcb->asoc.strmin[i].delivery_started = 0;
|
|
}
|
|
SCTP_FREE(oldstrm, SCTP_M_STRMI);
|
|
/* update the size */
|
|
stcb->asoc.streamincnt = num_stream;
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
|
|
sctp_notify_stream_reset_add(stcb, stcb->asoc.streamincnt, stcb->asoc.streamoutcnt, 0);
|
|
}
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
asoc->str_reset_seq_in++;
|
|
} else if ((asoc->str_reset_seq_in - 1) == seq) {
|
|
/*
|
|
* one seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
} else if ((asoc->str_reset_seq_in - 2) == seq) {
|
|
/*
|
|
* two seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
|
|
} else {
|
|
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
|
|
|
|
}
|
|
}
|
|
|
|
static void
|
|
sctp_handle_str_reset_add_out_strm(struct sctp_tcb *stcb, struct sctp_tmit_chunk *chk,
|
|
struct sctp_stream_reset_add_strm *str_add)
|
|
{
|
|
/*
|
|
* Peer is requesting to add more streams. If its within our
|
|
* max-streams we will allow it.
|
|
*/
|
|
uint16_t num_stream;
|
|
uint32_t seq;
|
|
struct sctp_association *asoc = &stcb->asoc;
|
|
|
|
/* Get the number. */
|
|
seq = ntohl(str_add->request_seq);
|
|
num_stream = ntohs(str_add->number_of_streams);
|
|
/* Now what would be the new total? */
|
|
if (asoc->str_reset_seq_in == seq) {
|
|
stcb->asoc.last_reset_action[1] = stcb->asoc.last_reset_action[0];
|
|
if (!(asoc->local_strreset_support & SCTP_ENABLE_CHANGE_ASSOC_REQ)) {
|
|
asoc->last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
} else if (stcb->asoc.stream_reset_outstanding) {
|
|
/* We must reject it we have something pending */
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_ERR_IN_PROGRESS;
|
|
} else {
|
|
/* Ok, we can do that :-) */
|
|
int mychk;
|
|
|
|
mychk = stcb->asoc.streamoutcnt;
|
|
mychk += num_stream;
|
|
if (mychk < 0x10000) {
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_PERFORMED;
|
|
if (sctp_send_str_reset_req(stcb, 0, NULL, 0, 0, 1, num_stream, 0, 1)) {
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
}
|
|
} else {
|
|
stcb->asoc.last_reset_action[0] = SCTP_STREAM_RESET_RESULT_DENIED;
|
|
}
|
|
}
|
|
sctp_add_stream_reset_result(chk, seq, stcb->asoc.last_reset_action[0]);
|
|
asoc->str_reset_seq_in++;
|
|
} else if ((asoc->str_reset_seq_in - 1) == seq) {
|
|
/*
|
|
* one seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[0]);
|
|
} else if ((asoc->str_reset_seq_in - 2) == seq) {
|
|
/*
|
|
* two seq back, just echo back last action since my
|
|
* response was lost.
|
|
*/
|
|
sctp_add_stream_reset_result(chk, seq, asoc->last_reset_action[1]);
|
|
} else {
|
|
sctp_add_stream_reset_result(chk, seq, SCTP_STREAM_RESET_RESULT_ERR_BAD_SEQNO);
|
|
}
|
|
}
|
|
|
|
#ifdef __GNUC__
|
|
__attribute__((noinline))
|
|
#endif
|
|
static int
|
|
sctp_handle_stream_reset(struct sctp_tcb *stcb, struct mbuf *m, int offset,
|
|
struct sctp_chunkhdr *ch_req)
|
|
{
|
|
uint16_t remaining_length, param_len, ptype;
|
|
struct sctp_paramhdr pstore;
|
|
uint8_t cstore[SCTP_CHUNK_BUFFER_SIZE];
|
|
uint32_t seq = 0;
|
|
int num_req = 0;
|
|
int trunc = 0;
|
|
struct sctp_tmit_chunk *chk;
|
|
struct sctp_chunkhdr *ch;
|
|
struct sctp_paramhdr *ph;
|
|
int ret_code = 0;
|
|
int num_param = 0;
|
|
|
|
/* now it may be a reset or a reset-response */
|
|
remaining_length = ntohs(ch_req->chunk_length) - sizeof(struct sctp_chunkhdr);
|
|
|
|
/* setup for adding the response */
|
|
sctp_alloc_a_chunk(stcb, chk);
|
|
if (chk == NULL) {
|
|
return (ret_code);
|
|
}
|
|
chk->copy_by_ref = 0;
|
|
chk->rec.chunk_id.id = SCTP_STREAM_RESET;
|
|
chk->rec.chunk_id.can_take_data = 0;
|
|
chk->flags = 0;
|
|
chk->asoc = &stcb->asoc;
|
|
chk->no_fr_allowed = 0;
|
|
chk->book_size = chk->send_size = sizeof(struct sctp_chunkhdr);
|
|
chk->book_size_scale = 0;
|
|
chk->data = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_NOWAIT, 1, MT_DATA);
|
|
if (chk->data == NULL) {
|
|
strres_nochunk:
|
|
if (chk->data) {
|
|
sctp_m_freem(chk->data);
|
|
chk->data = NULL;
|
|
}
|
|
sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
|
|
return (ret_code);
|
|
}
|
|
SCTP_BUF_RESV_UF(chk->data, SCTP_MIN_OVERHEAD);
|
|
|
|
/* setup chunk parameters */
|
|
chk->sent = SCTP_DATAGRAM_UNSENT;
|
|
chk->snd_count = 0;
|
|
chk->whoTo = NULL;
|
|
|
|
ch = mtod(chk->data, struct sctp_chunkhdr *);
|
|
ch->chunk_type = SCTP_STREAM_RESET;
|
|
ch->chunk_flags = 0;
|
|
ch->chunk_length = htons(chk->send_size);
|
|
SCTP_BUF_LEN(chk->data) = SCTP_SIZE32(chk->send_size);
|
|
offset += sizeof(struct sctp_chunkhdr);
|
|
while (remaining_length >= sizeof(struct sctp_paramhdr)) {
|
|
ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, sizeof(pstore), (uint8_t *) & pstore);
|
|
if (ph == NULL) {
|
|
/* TSNH */
|
|
break;
|
|
}
|
|
param_len = ntohs(ph->param_length);
|
|
if ((param_len > remaining_length) ||
|
|
(param_len < (sizeof(struct sctp_paramhdr) + sizeof(uint32_t)))) {
|
|
/* bad parameter length */
|
|
break;
|
|
}
|
|
ph = (struct sctp_paramhdr *)sctp_m_getptr(m, offset, min(param_len, sizeof(cstore)),
|
|
(uint8_t *) & cstore);
|
|
if (ph == NULL) {
|
|
/* TSNH */
|
|
break;
|
|
}
|
|
ptype = ntohs(ph->param_type);
|
|
num_param++;
|
|
if (param_len > sizeof(cstore)) {
|
|
trunc = 1;
|
|
} else {
|
|
trunc = 0;
|
|
}
|
|
if (num_param > SCTP_MAX_RESET_PARAMS) {
|
|
/* hit the max of parameters already sorry.. */
|
|
break;
|
|
}
|
|
if (ptype == SCTP_STR_RESET_OUT_REQUEST) {
|
|
struct sctp_stream_reset_out_request *req_out;
|
|
|
|
if (param_len < sizeof(struct sctp_stream_reset_out_request)) {
|
|
break;
|
|
}
|
|
req_out = (struct sctp_stream_reset_out_request *)ph;
|
|
num_req++;
|
|
if (stcb->asoc.stream_reset_outstanding) {
|
|
seq = ntohl(req_out->response_seq);
|
|
if (seq == stcb->asoc.str_reset_seq_out) {
|
|
/* implicit ack */
|
|
(void)sctp_handle_stream_reset_response(stcb, seq, SCTP_STREAM_RESET_RESULT_PERFORMED, NULL);
|
|
}
|
|
}
|
|
sctp_handle_str_reset_request_out(stcb, chk, req_out, trunc);
|
|
} else if (ptype == SCTP_STR_RESET_ADD_OUT_STREAMS) {
|
|
struct sctp_stream_reset_add_strm *str_add;
|
|
|
|
if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
|
|
break;
|
|
}
|
|
str_add = (struct sctp_stream_reset_add_strm *)ph;
|
|
num_req++;
|
|
sctp_handle_str_reset_add_strm(stcb, chk, str_add);
|
|
} else if (ptype == SCTP_STR_RESET_ADD_IN_STREAMS) {
|
|
struct sctp_stream_reset_add_strm *str_add;
|
|
|
|
if (param_len < sizeof(struct sctp_stream_reset_add_strm)) {
|
|
break;
|
|
}
|
|
str_add = (struct sctp_stream_reset_add_strm *)ph;
|
|
num_req++;
|
|
sctp_handle_str_reset_add_out_strm(stcb, chk, str_add);
|
|
} else if (ptype == SCTP_STR_RESET_IN_REQUEST) {
|
|
struct sctp_stream_reset_in_request *req_in;
|
|
|
|
num_req++;
|
|
req_in = (struct sctp_stream_reset_in_request *)ph;
|
|
sctp_handle_str_reset_request_in(stcb, chk, req_in, trunc);
|
|
} else if (ptype == SCTP_STR_RESET_TSN_REQUEST) {
|
|
struct sctp_stream_reset_tsn_request *req_tsn;
|
|
|
|
num_req++;
|
|
req_tsn = (struct sctp_stream_reset_tsn_request *)ph;
|
|
if (sctp_handle_str_reset_request_tsn(stcb, chk, req_tsn)) {
|
|
ret_code = 1;
|
|
goto strres_nochunk;
|
|
}
|
|
/* no more */
|
|
break;
|
|
} else if (ptype == SCTP_STR_RESET_RESPONSE) {
|
|
struct sctp_stream_reset_response *resp;
|
|
uint32_t result;
|
|
|
|
if (param_len < sizeof(struct sctp_stream_reset_response)) {
|
|
break;
|
|
}
|
|
resp = (struct sctp_stream_reset_response *)ph;
|
|
seq = ntohl(resp->response_seq);
|
|
result = ntohl(resp->result);
|
|
if (sctp_handle_stream_reset_response(stcb, seq, result, resp)) {
|
|
ret_code = 1;
|
|
goto strres_nochunk;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
offset += SCTP_SIZE32(param_len);
|
|
if (remaining_length >= SCTP_SIZE32(param_len)) {
|
|
remaining_length -= SCTP_SIZE32(param_len);
|
|
} else {
|
|
remaining_length = 0;
|
|
}
|
|
}
|
|
if (num_req == 0) {
|
|
/* we have no response free the stuff */
|
|
goto strres_nochunk;
|
|
}
|
|
/* ok we have a chunk to link in */
|
|
TAILQ_INSERT_TAIL(&stcb->asoc.control_send_queue,
|
|
chk,
|
|
sctp_next);
|
|
stcb->asoc.ctrl_queue_cnt++;
|
|
return (ret_code);
|
|
}
|
|
|
|
/*
|
|
* Handle a router or endpoints report of a packet loss, there are two ways
|
|
* to handle this, either we get the whole packet and must disect it
|
|
* ourselves (possibly with truncation and or corruption) or it is a summary
|
|
* from a middle box that did the disectting for us.
|
|
*/
|
|
static void
|
|
sctp_handle_packet_dropped(struct sctp_pktdrop_chunk *cp,
|
|
struct sctp_tcb *stcb, struct sctp_nets *net, uint32_t limit)
|
|
{
|
|
uint32_t bottle_bw, on_queue;
|
|
uint16_t trunc_len;
|
|
unsigned int chlen;
|
|
unsigned int at;
|
|
struct sctp_chunk_desc desc;
|
|
struct sctp_chunkhdr *ch;
|
|
|
|
chlen = ntohs(cp->ch.chunk_length);
|
|
chlen -= sizeof(struct sctp_pktdrop_chunk);
|
|
/* XXX possible chlen underflow */
|
|
if (chlen == 0) {
|
|
ch = NULL;
|
|
if (cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX)
|
|
SCTP_STAT_INCR(sctps_pdrpbwrpt);
|
|
} else {
|
|
ch = (struct sctp_chunkhdr *)(cp->data + sizeof(struct sctphdr));
|
|
chlen -= sizeof(struct sctphdr);
|
|
/* XXX possible chlen underflow */
|
|
memset(&desc, 0, sizeof(desc));
|
|
}
|
|
trunc_len = (uint16_t) ntohs(cp->trunc_len);
|
|
if (trunc_len > limit) {
|
|
trunc_len = limit;
|
|
}
|
|
/* now the chunks themselves */
|
|
while ((ch != NULL) && (chlen >= sizeof(struct sctp_chunkhdr))) {
|
|
desc.chunk_type = ch->chunk_type;
|
|
/* get amount we need to move */
|
|
at = ntohs(ch->chunk_length);
|
|
if (at < sizeof(struct sctp_chunkhdr)) {
|
|
/* corrupt chunk, maybe at the end? */
|
|
SCTP_STAT_INCR(sctps_pdrpcrupt);
|
|
break;
|
|
}
|
|
if (trunc_len == 0) {
|
|
/* we are supposed to have all of it */
|
|
if (at > chlen) {
|
|
/* corrupt skip it */
|
|
SCTP_STAT_INCR(sctps_pdrpcrupt);
|
|
break;
|
|
}
|
|
} else {
|
|
/* is there enough of it left ? */
|
|
if (desc.chunk_type == SCTP_DATA) {
|
|
if (chlen < (sizeof(struct sctp_data_chunk) +
|
|
sizeof(desc.data_bytes))) {
|
|
break;
|
|
}
|
|
} else {
|
|
if (chlen < sizeof(struct sctp_chunkhdr)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (desc.chunk_type == SCTP_DATA) {
|
|
/* can we get out the tsn? */
|
|
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
|
|
SCTP_STAT_INCR(sctps_pdrpmbda);
|
|
|
|
if (chlen >= (sizeof(struct sctp_data_chunk) + sizeof(uint32_t))) {
|
|
/* yep */
|
|
struct sctp_data_chunk *dcp;
|
|
uint8_t *ddp;
|
|
unsigned int iii;
|
|
|
|
dcp = (struct sctp_data_chunk *)ch;
|
|
ddp = (uint8_t *) (dcp + 1);
|
|
for (iii = 0; iii < sizeof(desc.data_bytes); iii++) {
|
|
desc.data_bytes[iii] = ddp[iii];
|
|
}
|
|
desc.tsn_ifany = dcp->dp.tsn;
|
|
} else {
|
|
/* nope we are done. */
|
|
SCTP_STAT_INCR(sctps_pdrpnedat);
|
|
break;
|
|
}
|
|
} else {
|
|
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX))
|
|
SCTP_STAT_INCR(sctps_pdrpmbct);
|
|
}
|
|
|
|
if (process_chunk_drop(stcb, &desc, net, cp->ch.chunk_flags)) {
|
|
SCTP_STAT_INCR(sctps_pdrppdbrk);
|
|
break;
|
|
}
|
|
if (SCTP_SIZE32(at) > chlen) {
|
|
break;
|
|
}
|
|
chlen -= SCTP_SIZE32(at);
|
|
if (chlen < sizeof(struct sctp_chunkhdr)) {
|
|
/* done, none left */
|
|
break;
|
|
}
|
|
ch = (struct sctp_chunkhdr *)((caddr_t)ch + SCTP_SIZE32(at));
|
|
}
|
|
/* Now update any rwnd --- possibly */
|
|
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) == 0) {
|
|
/* From a peer, we get a rwnd report */
|
|
uint32_t a_rwnd;
|
|
|
|
SCTP_STAT_INCR(sctps_pdrpfehos);
|
|
|
|
bottle_bw = ntohl(cp->bottle_bw);
|
|
on_queue = ntohl(cp->current_onq);
|
|
if (bottle_bw && on_queue) {
|
|
/* a rwnd report is in here */
|
|
if (bottle_bw > on_queue)
|
|
a_rwnd = bottle_bw - on_queue;
|
|
else
|
|
a_rwnd = 0;
|
|
|
|
if (a_rwnd == 0)
|
|
stcb->asoc.peers_rwnd = 0;
|
|
else {
|
|
if (a_rwnd > stcb->asoc.total_flight) {
|
|
stcb->asoc.peers_rwnd =
|
|
a_rwnd - stcb->asoc.total_flight;
|
|
} else {
|
|
stcb->asoc.peers_rwnd = 0;
|
|
}
|
|
if (stcb->asoc.peers_rwnd <
|
|
stcb->sctp_ep->sctp_ep.sctp_sws_sender) {
|
|
/* SWS sender side engages */
|
|
stcb->asoc.peers_rwnd = 0;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
SCTP_STAT_INCR(sctps_pdrpfmbox);
|
|
}
|
|
|
|
/* now middle boxes in sat networks get a cwnd bump */
|
|
if ((cp->ch.chunk_flags & SCTP_FROM_MIDDLE_BOX) &&
|
|
(stcb->asoc.sat_t3_loss_recovery == 0) &&
|
|
(stcb->asoc.sat_network)) {
|
|
/*
|
|
* This is debateable but for sat networks it makes sense
|
|
* Note if a T3 timer has went off, we will prohibit any
|
|
* changes to cwnd until we exit the t3 loss recovery.
|
|
*/
|
|
stcb->asoc.cc_functions.sctp_cwnd_update_after_packet_dropped(stcb,
|
|
net, cp, &bottle_bw, &on_queue);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* handles all control chunks in a packet inputs: - m: mbuf chain, assumed to
|
|
* still contain IP/SCTP header - stcb: is the tcb found for this packet -
|
|
* offset: offset into the mbuf chain to first chunkhdr - length: is the
|
|
* length of the complete packet outputs: - length: modified to remaining
|
|
* length after control processing - netp: modified to new sctp_nets after
|
|
* cookie-echo processing - return NULL to discard the packet (ie. no asoc,
|
|
* bad packet,...) otherwise return the tcb for this packet
|
|
*/
|
|
#ifdef __GNUC__
|
|
__attribute__((noinline))
|
|
#endif
|
|
static struct sctp_tcb *
|
|
sctp_process_control(struct mbuf *m, int iphlen, int *offset, int length,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_chunkhdr *ch, struct sctp_inpcb *inp,
|
|
struct sctp_tcb *stcb, struct sctp_nets **netp, int *fwd_tsn_seen,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct mbuf *op_err;
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
uint32_t vtag_in;
|
|
int num_chunks = 0; /* number of control chunks processed */
|
|
uint32_t chk_length;
|
|
int ret;
|
|
int abort_no_unlock = 0;
|
|
int ecne_seen = 0;
|
|
|
|
/*
|
|
* How big should this be, and should it be alloc'd? Lets try the
|
|
* d-mtu-ceiling for now (2k) and that should hopefully work ...
|
|
* until we get into jumbo grams and such..
|
|
*/
|
|
uint8_t chunk_buf[SCTP_CHUNK_BUFFER_SIZE];
|
|
struct sctp_tcb *locked_tcb = stcb;
|
|
int got_auth = 0;
|
|
uint32_t auth_offset = 0, auth_len = 0;
|
|
int auth_skipped = 0;
|
|
int asconf_cnt = 0;
|
|
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
struct socket *so;
|
|
|
|
#endif
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "sctp_process_control: iphlen=%u, offset=%u, length=%u stcb:%p\n",
|
|
iphlen, *offset, length, (void *)stcb);
|
|
|
|
/* validate chunk header length... */
|
|
if (ntohs(ch->chunk_length) < sizeof(*ch)) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Invalid header length %d\n",
|
|
ntohs(ch->chunk_length));
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* validate the verification tag
|
|
*/
|
|
vtag_in = ntohl(sh->v_tag);
|
|
|
|
if (locked_tcb) {
|
|
SCTP_TCB_LOCK_ASSERT(locked_tcb);
|
|
}
|
|
if (ch->chunk_type == SCTP_INITIATION) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Its an INIT of len:%d vtag:%x\n",
|
|
ntohs(ch->chunk_length), vtag_in);
|
|
if (vtag_in != 0) {
|
|
/* protocol error- silently discard... */
|
|
SCTP_STAT_INCR(sctps_badvtag);
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
} else if (ch->chunk_type != SCTP_COOKIE_ECHO) {
|
|
/*
|
|
* If there is no stcb, skip the AUTH chunk and process
|
|
* later after a stcb is found (to validate the lookup was
|
|
* valid.
|
|
*/
|
|
if ((ch->chunk_type == SCTP_AUTHENTICATION) &&
|
|
(stcb == NULL) &&
|
|
(inp->auth_supported == 1)) {
|
|
/* save this chunk for later processing */
|
|
auth_skipped = 1;
|
|
auth_offset = *offset;
|
|
auth_len = ntohs(ch->chunk_length);
|
|
|
|
/* (temporarily) move past this chunk */
|
|
*offset += SCTP_SIZE32(auth_len);
|
|
if (*offset >= length) {
|
|
/* no more data left in the mbuf chain */
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
|
|
sizeof(struct sctp_chunkhdr), chunk_buf);
|
|
}
|
|
if (ch == NULL) {
|
|
/* Help */
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
if (ch->chunk_type == SCTP_COOKIE_ECHO) {
|
|
goto process_control_chunks;
|
|
}
|
|
/*
|
|
* first check if it's an ASCONF with an unknown src addr we
|
|
* need to look inside to find the association
|
|
*/
|
|
if (ch->chunk_type == SCTP_ASCONF && stcb == NULL) {
|
|
struct sctp_chunkhdr *asconf_ch = ch;
|
|
uint32_t asconf_offset = 0, asconf_len = 0;
|
|
|
|
/* inp's refcount may be reduced */
|
|
SCTP_INP_INCR_REF(inp);
|
|
|
|
asconf_offset = *offset;
|
|
do {
|
|
asconf_len = ntohs(asconf_ch->chunk_length);
|
|
if (asconf_len < sizeof(struct sctp_asconf_paramhdr))
|
|
break;
|
|
stcb = sctp_findassociation_ep_asconf(m,
|
|
*offset,
|
|
dst,
|
|
sh, &inp, netp, vrf_id);
|
|
if (stcb != NULL)
|
|
break;
|
|
asconf_offset += SCTP_SIZE32(asconf_len);
|
|
asconf_ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, asconf_offset,
|
|
sizeof(struct sctp_chunkhdr), chunk_buf);
|
|
} while (asconf_ch != NULL && asconf_ch->chunk_type == SCTP_ASCONF);
|
|
if (stcb == NULL) {
|
|
/*
|
|
* reduce inp's refcount if not reduced in
|
|
* sctp_findassociation_ep_asconf().
|
|
*/
|
|
SCTP_INP_DECR_REF(inp);
|
|
} else {
|
|
locked_tcb = stcb;
|
|
}
|
|
|
|
/* now go back and verify any auth chunk to be sure */
|
|
if (auth_skipped && (stcb != NULL)) {
|
|
struct sctp_auth_chunk *auth;
|
|
|
|
auth = (struct sctp_auth_chunk *)
|
|
sctp_m_getptr(m, auth_offset,
|
|
auth_len, chunk_buf);
|
|
got_auth = 1;
|
|
auth_skipped = 0;
|
|
if ((auth == NULL) || sctp_handle_auth(stcb, auth, m,
|
|
auth_offset)) {
|
|
/* auth HMAC failed so dump it */
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
} else {
|
|
/* remaining chunks are HMAC checked */
|
|
stcb->asoc.authenticated = 1;
|
|
}
|
|
}
|
|
}
|
|
if (stcb == NULL) {
|
|
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
/* no association, so it's out of the blue... */
|
|
sctp_handle_ootb(m, iphlen, *offset, src, dst, sh, inp, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
asoc = &stcb->asoc;
|
|
/* ABORT and SHUTDOWN can use either v_tag... */
|
|
if ((ch->chunk_type == SCTP_ABORT_ASSOCIATION) ||
|
|
(ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) ||
|
|
(ch->chunk_type == SCTP_PACKET_DROPPED)) {
|
|
/* Take the T-bit always into account. */
|
|
if ((((ch->chunk_flags & SCTP_HAD_NO_TCB) == 0) &&
|
|
(vtag_in == asoc->my_vtag)) ||
|
|
(((ch->chunk_flags & SCTP_HAD_NO_TCB) == SCTP_HAD_NO_TCB) &&
|
|
(vtag_in == asoc->peer_vtag))) {
|
|
/* this is valid */
|
|
} else {
|
|
/* drop this packet... */
|
|
SCTP_STAT_INCR(sctps_badvtag);
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
} else if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
|
|
if (vtag_in != asoc->my_vtag) {
|
|
/*
|
|
* this could be a stale SHUTDOWN-ACK or the
|
|
* peer never got the SHUTDOWN-COMPLETE and
|
|
* is still hung; we have started a new asoc
|
|
* but it won't complete until the shutdown
|
|
* is completed
|
|
*/
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
sctp_handle_ootb(m, iphlen, *offset, src, dst,
|
|
sh, inp, op_err,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
return (NULL);
|
|
}
|
|
} else {
|
|
/* for all other chunks, vtag must match */
|
|
if (vtag_in != asoc->my_vtag) {
|
|
/* invalid vtag... */
|
|
SCTPDBG(SCTP_DEBUG_INPUT3,
|
|
"invalid vtag: %xh, expect %xh\n",
|
|
vtag_in, asoc->my_vtag);
|
|
SCTP_STAT_INCR(sctps_badvtag);
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
}
|
|
} /* end if !SCTP_COOKIE_ECHO */
|
|
/*
|
|
* process all control chunks...
|
|
*/
|
|
if (((ch->chunk_type == SCTP_SELECTIVE_ACK) ||
|
|
(ch->chunk_type == SCTP_NR_SELECTIVE_ACK) ||
|
|
(ch->chunk_type == SCTP_HEARTBEAT_REQUEST)) &&
|
|
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_ECHOED)) {
|
|
/* implied cookie-ack.. we must have lost the ack */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb,
|
|
*netp);
|
|
}
|
|
process_control_chunks:
|
|
while (IS_SCTP_CONTROL(ch)) {
|
|
/* validate chunk length */
|
|
chk_length = ntohs(ch->chunk_length);
|
|
SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_process_control: processing a chunk type=%u, len=%u\n",
|
|
ch->chunk_type, chk_length);
|
|
SCTP_LTRACE_CHK(inp, stcb, ch->chunk_type, chk_length);
|
|
if (chk_length < sizeof(*ch) ||
|
|
(*offset + (int)chk_length) > length) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
SCTP_STAT_INCR_COUNTER64(sctps_incontrolchunks);
|
|
/*
|
|
* INIT-ACK only gets the init ack "header" portion only
|
|
* because we don't have to process the peer's COOKIE. All
|
|
* others get a complete chunk.
|
|
*/
|
|
if ((ch->chunk_type == SCTP_INITIATION_ACK) ||
|
|
(ch->chunk_type == SCTP_INITIATION)) {
|
|
/* get an init-ack chunk */
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
|
|
sizeof(struct sctp_init_ack_chunk), chunk_buf);
|
|
if (ch == NULL) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
} else {
|
|
/* For cookies and all other chunks. */
|
|
if (chk_length > sizeof(chunk_buf)) {
|
|
/*
|
|
* use just the size of the chunk buffer so
|
|
* the front part of our chunks fit in
|
|
* contiguous space up to the chunk buffer
|
|
* size (508 bytes). For chunks that need to
|
|
* get more than that they must use the
|
|
* sctp_m_getptr() function or other means
|
|
* (e.g. know how to parse mbuf chains).
|
|
* Cookies do this already.
|
|
*/
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
|
|
(sizeof(chunk_buf) - 4),
|
|
chunk_buf);
|
|
if (ch == NULL) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
} else {
|
|
/* We can fit it all */
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
|
|
chk_length, chunk_buf);
|
|
if (ch == NULL) {
|
|
SCTP_PRINTF("sctp_process_control: Can't get the all data....\n");
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
}
|
|
}
|
|
num_chunks++;
|
|
/* Save off the last place we got a control from */
|
|
if (stcb != NULL) {
|
|
if (((netp != NULL) && (*netp != NULL)) || (ch->chunk_type == SCTP_ASCONF)) {
|
|
/*
|
|
* allow last_control to be NULL if
|
|
* ASCONF... ASCONF processing will find the
|
|
* right net later
|
|
*/
|
|
if ((netp != NULL) && (*netp != NULL))
|
|
stcb->asoc.last_control_chunk_from = *netp;
|
|
}
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xB0, ch->chunk_type);
|
|
#endif
|
|
|
|
/* check to see if this chunk required auth, but isn't */
|
|
if ((stcb != NULL) &&
|
|
(stcb->asoc.auth_supported == 1) &&
|
|
sctp_auth_is_required_chunk(ch->chunk_type, stcb->asoc.local_auth_chunks) &&
|
|
!stcb->asoc.authenticated) {
|
|
/* "silently" ignore */
|
|
SCTP_STAT_INCR(sctps_recvauthmissing);
|
|
goto next_chunk;
|
|
}
|
|
switch (ch->chunk_type) {
|
|
case SCTP_INITIATION:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT\n");
|
|
/* The INIT chunk must be the only chunk. */
|
|
if ((num_chunks > 1) ||
|
|
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
|
|
/* RFC 4960 requires that no ABORT is sent */
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
/* Honor our resource limit. */
|
|
if (chk_length > SCTP_LARGEST_INIT_ACCEPTED) {
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
|
|
sctp_abort_association(inp, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
sctp_handle_init(m, iphlen, *offset, src, dst, sh,
|
|
(struct sctp_init_chunk *)ch, inp,
|
|
stcb, &abort_no_unlock,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
*offset = length;
|
|
if ((!abort_no_unlock) && (locked_tcb)) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
break;
|
|
case SCTP_PAD_CHUNK:
|
|
break;
|
|
case SCTP_INITIATION_ACK:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_INIT-ACK\n");
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/* We are not interested anymore */
|
|
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
|
|
;
|
|
} else {
|
|
if (locked_tcb != stcb) {
|
|
/* Very unlikely */
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
if (stcb) {
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(inp);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_29);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
}
|
|
return (NULL);
|
|
}
|
|
}
|
|
/* The INIT-ACK chunk must be the only chunk. */
|
|
if ((num_chunks > 1) ||
|
|
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
if ((netp) && (*netp)) {
|
|
ret = sctp_handle_init_ack(m, iphlen, *offset,
|
|
src, dst, sh,
|
|
(struct sctp_init_ack_chunk *)ch,
|
|
stcb, *netp,
|
|
&abort_no_unlock,
|
|
mflowtype, mflowid,
|
|
vrf_id);
|
|
} else {
|
|
ret = -1;
|
|
}
|
|
*offset = length;
|
|
if (abort_no_unlock) {
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* Special case, I must call the output routine to
|
|
* get the cookie echoed
|
|
*/
|
|
if ((stcb != NULL) && (ret == 0)) {
|
|
sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
break;
|
|
case SCTP_SELECTIVE_ACK:
|
|
{
|
|
struct sctp_sack_chunk *sack;
|
|
int abort_now = 0;
|
|
uint32_t a_rwnd, cum_ack;
|
|
uint16_t num_seg, num_dup;
|
|
uint8_t flags;
|
|
int offset_seg, offset_dup;
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK\n");
|
|
SCTP_STAT_INCR(sctps_recvsacks);
|
|
if (stcb == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing SACK chunk\n");
|
|
break;
|
|
}
|
|
if (chk_length < sizeof(struct sctp_sack_chunk)) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on SACK chunk, too small\n");
|
|
break;
|
|
}
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
/*-
|
|
* If we have sent a shutdown-ack, we will pay no
|
|
* attention to a sack sent in to us since
|
|
* we don't care anymore.
|
|
*/
|
|
break;
|
|
}
|
|
sack = (struct sctp_sack_chunk *)ch;
|
|
flags = ch->chunk_flags;
|
|
cum_ack = ntohl(sack->sack.cum_tsn_ack);
|
|
num_seg = ntohs(sack->sack.num_gap_ack_blks);
|
|
num_dup = ntohs(sack->sack.num_dup_tsns);
|
|
a_rwnd = (uint32_t) ntohl(sack->sack.a_rwnd);
|
|
if (sizeof(struct sctp_sack_chunk) +
|
|
num_seg * sizeof(struct sctp_gap_ack_block) +
|
|
num_dup * sizeof(uint32_t) != chk_length) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of SACK chunk\n");
|
|
break;
|
|
}
|
|
offset_seg = *offset + sizeof(struct sctp_sack_chunk);
|
|
offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
|
|
cum_ack, num_seg, a_rwnd);
|
|
stcb->asoc.seen_a_sack_this_pkt = 1;
|
|
if ((stcb->asoc.pr_sctp_cnt == 0) &&
|
|
(num_seg == 0) &&
|
|
SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
|
|
(stcb->asoc.saw_sack_with_frags == 0) &&
|
|
(stcb->asoc.saw_sack_with_nr_frags == 0) &&
|
|
(!TAILQ_EMPTY(&stcb->asoc.sent_queue))
|
|
) {
|
|
/*
|
|
* We have a SIMPLE sack having no
|
|
* prior segments and data on sent
|
|
* queue to be acked.. Use the
|
|
* faster path sack processing. We
|
|
* also allow window update sacks
|
|
* with no missing segments to go
|
|
* this way too.
|
|
*/
|
|
sctp_express_handle_sack(stcb, cum_ack, a_rwnd, &abort_now, ecne_seen);
|
|
} else {
|
|
if (netp && *netp)
|
|
sctp_handle_sack(m, offset_seg, offset_dup, stcb,
|
|
num_seg, 0, num_dup, &abort_now, flags,
|
|
cum_ack, a_rwnd, ecne_seen);
|
|
}
|
|
if (abort_now) {
|
|
/* ABORT signal from sack processing */
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
|
|
TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
|
|
(stcb->asoc.stream_queue_cnt == 0)) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
}
|
|
break;
|
|
/*
|
|
* EY - nr_sack: If the received chunk is an
|
|
* nr_sack chunk
|
|
*/
|
|
case SCTP_NR_SELECTIVE_ACK:
|
|
{
|
|
struct sctp_nr_sack_chunk *nr_sack;
|
|
int abort_now = 0;
|
|
uint32_t a_rwnd, cum_ack;
|
|
uint16_t num_seg, num_nr_seg, num_dup;
|
|
uint8_t flags;
|
|
int offset_seg, offset_dup;
|
|
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK\n");
|
|
SCTP_STAT_INCR(sctps_recvsacks);
|
|
if (stcb == NULL) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "No stcb when processing NR-SACK chunk\n");
|
|
break;
|
|
}
|
|
if (stcb->asoc.nrsack_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if (chk_length < sizeof(struct sctp_nr_sack_chunk)) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size on NR-SACK chunk, too small\n");
|
|
break;
|
|
}
|
|
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_ACK_SENT) {
|
|
/*-
|
|
* If we have sent a shutdown-ack, we will pay no
|
|
* attention to a sack sent in to us since
|
|
* we don't care anymore.
|
|
*/
|
|
break;
|
|
}
|
|
nr_sack = (struct sctp_nr_sack_chunk *)ch;
|
|
flags = ch->chunk_flags;
|
|
cum_ack = ntohl(nr_sack->nr_sack.cum_tsn_ack);
|
|
num_seg = ntohs(nr_sack->nr_sack.num_gap_ack_blks);
|
|
num_nr_seg = ntohs(nr_sack->nr_sack.num_nr_gap_ack_blks);
|
|
num_dup = ntohs(nr_sack->nr_sack.num_dup_tsns);
|
|
a_rwnd = (uint32_t) ntohl(nr_sack->nr_sack.a_rwnd);
|
|
if (sizeof(struct sctp_nr_sack_chunk) +
|
|
(num_seg + num_nr_seg) * sizeof(struct sctp_gap_ack_block) +
|
|
num_dup * sizeof(uint32_t) != chk_length) {
|
|
SCTPDBG(SCTP_DEBUG_INDATA1, "Bad size of NR_SACK chunk\n");
|
|
break;
|
|
}
|
|
offset_seg = *offset + sizeof(struct sctp_nr_sack_chunk);
|
|
offset_dup = offset_seg + num_seg * sizeof(struct sctp_gap_ack_block);
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_NR_SACK process cum_ack:%x num_seg:%d a_rwnd:%d\n",
|
|
cum_ack, num_seg, a_rwnd);
|
|
stcb->asoc.seen_a_sack_this_pkt = 1;
|
|
if ((stcb->asoc.pr_sctp_cnt == 0) &&
|
|
(num_seg == 0) && (num_nr_seg == 0) &&
|
|
SCTP_TSN_GE(cum_ack, stcb->asoc.last_acked_seq) &&
|
|
(stcb->asoc.saw_sack_with_frags == 0) &&
|
|
(stcb->asoc.saw_sack_with_nr_frags == 0) &&
|
|
(!TAILQ_EMPTY(&stcb->asoc.sent_queue))) {
|
|
/*
|
|
* We have a SIMPLE sack having no
|
|
* prior segments and data on sent
|
|
* queue to be acked. Use the faster
|
|
* path sack processing. We also
|
|
* allow window update sacks with no
|
|
* missing segments to go this way
|
|
* too.
|
|
*/
|
|
sctp_express_handle_sack(stcb, cum_ack, a_rwnd,
|
|
&abort_now, ecne_seen);
|
|
} else {
|
|
if (netp && *netp)
|
|
sctp_handle_sack(m, offset_seg, offset_dup, stcb,
|
|
num_seg, num_nr_seg, num_dup, &abort_now, flags,
|
|
cum_ack, a_rwnd, ecne_seen);
|
|
}
|
|
if (abort_now) {
|
|
/* ABORT signal from sack processing */
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (TAILQ_EMPTY(&stcb->asoc.send_queue) &&
|
|
TAILQ_EMPTY(&stcb->asoc.sent_queue) &&
|
|
(stcb->asoc.stream_queue_cnt == 0)) {
|
|
sctp_ulp_notify(SCTP_NOTIFY_SENDER_DRY, stcb, 0, NULL, SCTP_SO_NOT_LOCKED);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case SCTP_HEARTBEAT_REQUEST:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT\n");
|
|
if ((stcb) && netp && *netp) {
|
|
SCTP_STAT_INCR(sctps_recvheartbeat);
|
|
sctp_send_heartbeat_ack(stcb, m, *offset,
|
|
chk_length, *netp);
|
|
|
|
/* He's alive so give him credit */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
}
|
|
break;
|
|
case SCTP_HEARTBEAT_ACK:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_HEARTBEAT-ACK\n");
|
|
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_heartbeat_chunk))) {
|
|
/* Its not ours */
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
/* He's alive so give him credit */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
SCTP_STAT_INCR(sctps_recvheartbeatack);
|
|
if (netp && *netp)
|
|
sctp_handle_heartbeat_ack((struct sctp_heartbeat_chunk *)ch,
|
|
stcb, *netp);
|
|
break;
|
|
case SCTP_ABORT_ASSOCIATION:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ABORT, stcb %p\n",
|
|
(void *)stcb);
|
|
if ((stcb) && netp && *netp)
|
|
sctp_handle_abort((struct sctp_abort_chunk *)ch,
|
|
stcb, *netp);
|
|
*offset = length;
|
|
return (NULL);
|
|
break;
|
|
case SCTP_SHUTDOWN:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN, stcb %p\n",
|
|
(void *)stcb);
|
|
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_shutdown_chunk))) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
if (netp && *netp) {
|
|
int abort_flag = 0;
|
|
|
|
sctp_handle_shutdown((struct sctp_shutdown_chunk *)ch,
|
|
stcb, *netp, &abort_flag);
|
|
if (abort_flag) {
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
}
|
|
break;
|
|
case SCTP_SHUTDOWN_ACK:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-ACK, stcb %p\n", (void *)stcb);
|
|
if ((stcb) && (netp) && (*netp))
|
|
sctp_handle_shutdown_ack((struct sctp_shutdown_ack_chunk *)ch, stcb, *netp);
|
|
*offset = length;
|
|
return (NULL);
|
|
break;
|
|
|
|
case SCTP_OPERATION_ERROR:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_OP-ERR\n");
|
|
if ((stcb) && netp && *netp && sctp_handle_error(ch, stcb, *netp) < 0) {
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
break;
|
|
case SCTP_COOKIE_ECHO:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3,
|
|
"SCTP_COOKIE-ECHO, stcb %p\n", (void *)stcb);
|
|
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
|
|
;
|
|
} else {
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/* We are not interested anymore */
|
|
abend:
|
|
if (stcb) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
}
|
|
/*
|
|
* First are we accepting? We do this again here
|
|
* since it is possible that a previous endpoint WAS
|
|
* listening responded to a INIT-ACK and then
|
|
* closed. We opened and bound.. and are now no
|
|
* longer listening.
|
|
*/
|
|
|
|
if ((stcb == NULL) && (inp->sctp_socket->so_qlen >= inp->sctp_socket->so_qlimit)) {
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
|
|
(SCTP_BASE_SYSCTL(sctp_abort_if_one_2_one_hits_limit))) {
|
|
op_err = sctp_generate_cause(SCTP_CAUSE_OUT_OF_RESC, "");
|
|
sctp_abort_association(inp, stcb, m, iphlen,
|
|
src, dst, sh, op_err,
|
|
mflowtype, mflowid,
|
|
vrf_id, port);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
} else {
|
|
struct mbuf *ret_buf;
|
|
struct sctp_inpcb *linp;
|
|
|
|
if (stcb) {
|
|
linp = NULL;
|
|
} else {
|
|
linp = inp;
|
|
}
|
|
|
|
if (linp) {
|
|
SCTP_ASOC_CREATE_LOCK(linp);
|
|
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
|
|
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
|
|
SCTP_ASOC_CREATE_UNLOCK(linp);
|
|
goto abend;
|
|
}
|
|
}
|
|
if (netp) {
|
|
ret_buf =
|
|
sctp_handle_cookie_echo(m, iphlen,
|
|
*offset,
|
|
src, dst,
|
|
sh,
|
|
(struct sctp_cookie_echo_chunk *)ch,
|
|
&inp, &stcb, netp,
|
|
auth_skipped,
|
|
auth_offset,
|
|
auth_len,
|
|
&locked_tcb,
|
|
mflowtype,
|
|
mflowid,
|
|
vrf_id,
|
|
port);
|
|
} else {
|
|
ret_buf = NULL;
|
|
}
|
|
if (linp) {
|
|
SCTP_ASOC_CREATE_UNLOCK(linp);
|
|
}
|
|
if (ret_buf == NULL) {
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
SCTPDBG(SCTP_DEBUG_INPUT3,
|
|
"GAK, null buffer\n");
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
/* if AUTH skipped, see if it verified... */
|
|
if (auth_skipped) {
|
|
got_auth = 1;
|
|
auth_skipped = 0;
|
|
}
|
|
if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) {
|
|
/*
|
|
* Restart the timer if we have
|
|
* pending data
|
|
*/
|
|
struct sctp_tmit_chunk *chk;
|
|
|
|
chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
|
|
sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo);
|
|
}
|
|
}
|
|
break;
|
|
case SCTP_COOKIE_ACK:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_COOKIE-ACK, stcb %p\n", (void *)stcb);
|
|
if ((stcb == NULL) || chk_length != sizeof(struct sctp_cookie_ack_chunk)) {
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/* We are not interested anymore */
|
|
if ((stcb) && (stcb->asoc.total_output_queue_size)) {
|
|
;
|
|
} else if (stcb) {
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(inp);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_30);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
}
|
|
/* He's alive so give him credit */
|
|
if ((stcb) && netp && *netp) {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, *netp);
|
|
}
|
|
break;
|
|
case SCTP_ECN_ECHO:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-ECHO\n");
|
|
/* He's alive so give him credit */
|
|
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_ecne_chunk))) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (stcb) {
|
|
if (stcb->asoc.ecn_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_ecn_echo((struct sctp_ecne_chunk *)ch,
|
|
stcb);
|
|
ecne_seen = 1;
|
|
}
|
|
break;
|
|
case SCTP_ECN_CWR:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ECN-CWR\n");
|
|
/* He's alive so give him credit */
|
|
if ((stcb == NULL) || (chk_length != sizeof(struct sctp_cwr_chunk))) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (stcb) {
|
|
if (stcb->asoc.ecn_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_ecn_cwr((struct sctp_cwr_chunk *)ch, stcb, *netp);
|
|
}
|
|
break;
|
|
case SCTP_SHUTDOWN_COMPLETE:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_SHUTDOWN-COMPLETE, stcb %p\n", (void *)stcb);
|
|
/* must be first and only chunk */
|
|
if ((num_chunks > 1) ||
|
|
(length - *offset > (int)SCTP_SIZE32(chk_length))) {
|
|
*offset = length;
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
return (NULL);
|
|
}
|
|
if ((stcb) && netp && *netp) {
|
|
sctp_handle_shutdown_complete((struct sctp_shutdown_complete_chunk *)ch,
|
|
stcb, *netp);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
break;
|
|
case SCTP_ASCONF:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF\n");
|
|
/* He's alive so give him credit */
|
|
if (stcb) {
|
|
if (stcb->asoc.asconf_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_asconf(m, *offset, src,
|
|
(struct sctp_asconf_chunk *)ch, stcb, asconf_cnt == 0);
|
|
asconf_cnt++;
|
|
}
|
|
break;
|
|
case SCTP_ASCONF_ACK:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_ASCONF-ACK\n");
|
|
if (chk_length < sizeof(struct sctp_asconf_ack_chunk)) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if ((stcb) && netp && *netp) {
|
|
if (stcb->asoc.asconf_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
/* He's alive so give him credit */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_asconf_ack(m, *offset,
|
|
(struct sctp_asconf_ack_chunk *)ch, stcb, *netp, &abort_no_unlock);
|
|
if (abort_no_unlock)
|
|
return (NULL);
|
|
}
|
|
break;
|
|
case SCTP_FORWARD_CUM_TSN:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_FWD-TSN\n");
|
|
if (chk_length < sizeof(struct sctp_forward_tsn_chunk)) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
/* He's alive so give him credit */
|
|
if (stcb) {
|
|
int abort_flag = 0;
|
|
|
|
if (stcb->asoc.prsctp_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
*fwd_tsn_seen = 1;
|
|
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
|
|
/* We are not interested anymore */
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
so = SCTP_INP_SO(inp);
|
|
atomic_add_int(&stcb->asoc.refcnt, 1);
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
SCTP_SOCKET_LOCK(so, 1);
|
|
SCTP_TCB_LOCK(stcb);
|
|
atomic_subtract_int(&stcb->asoc.refcnt, 1);
|
|
#endif
|
|
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC,
|
|
SCTP_FROM_SCTP_INPUT + SCTP_LOC_31);
|
|
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
|
|
SCTP_SOCKET_UNLOCK(so, 1);
|
|
#endif
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
sctp_handle_forward_tsn(stcb,
|
|
(struct sctp_forward_tsn_chunk *)ch, &abort_flag, m, *offset);
|
|
if (abort_flag) {
|
|
*offset = length;
|
|
return (NULL);
|
|
} else {
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
}
|
|
|
|
}
|
|
break;
|
|
case SCTP_STREAM_RESET:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_STREAM_RESET\n");
|
|
if (((stcb == NULL) || (ch == NULL) || (chk_length < sizeof(struct sctp_stream_reset_tsn_req)))) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (stcb->asoc.reconfig_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if (sctp_handle_stream_reset(stcb, m, *offset, ch)) {
|
|
/* stop processing */
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
break;
|
|
case SCTP_PACKET_DROPPED:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_PACKET_DROPPED\n");
|
|
/* re-get it all please */
|
|
if (chk_length < sizeof(struct sctp_pktdrop_chunk)) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (ch && (stcb) && netp && (*netp)) {
|
|
if (stcb->asoc.pktdrop_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
sctp_handle_packet_dropped((struct sctp_pktdrop_chunk *)ch,
|
|
stcb, *netp,
|
|
min(chk_length, (sizeof(chunk_buf) - 4)));
|
|
|
|
}
|
|
break;
|
|
case SCTP_AUTHENTICATION:
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "SCTP_AUTHENTICATION\n");
|
|
if (stcb == NULL) {
|
|
/* save the first AUTH for later processing */
|
|
if (auth_skipped == 0) {
|
|
auth_offset = *offset;
|
|
auth_len = chk_length;
|
|
auth_skipped = 1;
|
|
}
|
|
/* skip this chunk (temporarily) */
|
|
goto next_chunk;
|
|
}
|
|
if (stcb->asoc.auth_supported == 0) {
|
|
goto unknown_chunk;
|
|
}
|
|
if ((chk_length < (sizeof(struct sctp_auth_chunk))) ||
|
|
(chk_length > (sizeof(struct sctp_auth_chunk) +
|
|
SCTP_AUTH_DIGEST_LEN_MAX))) {
|
|
/* Its not ours */
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
if (got_auth == 1) {
|
|
/* skip this chunk... it's already auth'd */
|
|
goto next_chunk;
|
|
}
|
|
got_auth = 1;
|
|
if ((ch == NULL) || sctp_handle_auth(stcb, (struct sctp_auth_chunk *)ch,
|
|
m, *offset)) {
|
|
/* auth HMAC failed so dump the packet */
|
|
*offset = length;
|
|
return (stcb);
|
|
} else {
|
|
/* remaining chunks are HMAC checked */
|
|
stcb->asoc.authenticated = 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
unknown_chunk:
|
|
/* it's an unknown chunk! */
|
|
if ((ch->chunk_type & 0x40) && (stcb != NULL)) {
|
|
struct sctp_gen_error_cause *cause;
|
|
int len;
|
|
|
|
op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_gen_error_cause),
|
|
0, M_NOWAIT, 1, MT_DATA);
|
|
if (op_err != NULL) {
|
|
len = min(SCTP_SIZE32(chk_length), (uint32_t) (length - *offset));
|
|
cause = mtod(op_err, struct sctp_gen_error_cause *);
|
|
cause->code = htons(SCTP_CAUSE_UNRECOG_CHUNK);
|
|
cause->length = htons(len + sizeof(struct sctp_gen_error_cause));
|
|
SCTP_BUF_LEN(op_err) = sizeof(struct sctp_gen_error_cause);
|
|
SCTP_BUF_NEXT(op_err) = SCTP_M_COPYM(m, *offset, len, M_NOWAIT);
|
|
if (SCTP_BUF_NEXT(op_err) != NULL) {
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(SCTP_BUF_NEXT(op_err), SCTP_MBUF_ICOPY);
|
|
}
|
|
#endif
|
|
sctp_queue_op_err(stcb, op_err);
|
|
} else {
|
|
sctp_m_freem(op_err);
|
|
}
|
|
}
|
|
}
|
|
if ((ch->chunk_type & 0x80) == 0) {
|
|
/* discard this packet */
|
|
*offset = length;
|
|
return (stcb);
|
|
} /* else skip this bad chunk and continue... */
|
|
break;
|
|
} /* switch (ch->chunk_type) */
|
|
|
|
|
|
next_chunk:
|
|
/* get the next chunk */
|
|
*offset += SCTP_SIZE32(chk_length);
|
|
if (*offset >= length) {
|
|
/* no more data left in the mbuf chain */
|
|
break;
|
|
}
|
|
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, *offset,
|
|
sizeof(struct sctp_chunkhdr), chunk_buf);
|
|
if (ch == NULL) {
|
|
if (locked_tcb) {
|
|
SCTP_TCB_UNLOCK(locked_tcb);
|
|
}
|
|
*offset = length;
|
|
return (NULL);
|
|
}
|
|
} /* while */
|
|
|
|
if (asconf_cnt > 0 && stcb != NULL) {
|
|
sctp_send_asconf_ack(stcb);
|
|
}
|
|
return (stcb);
|
|
}
|
|
|
|
|
|
/*
|
|
* common input chunk processing (v4 and v6)
|
|
*/
|
|
void
|
|
sctp_common_input_processing(struct mbuf **mm, int iphlen, int offset, int length,
|
|
struct sockaddr *src, struct sockaddr *dst,
|
|
struct sctphdr *sh, struct sctp_chunkhdr *ch,
|
|
#if !defined(SCTP_WITH_NO_CSUM)
|
|
uint8_t compute_crc,
|
|
#endif
|
|
uint8_t ecn_bits,
|
|
uint8_t mflowtype, uint32_t mflowid, uint16_t fibnum,
|
|
uint32_t vrf_id, uint16_t port)
|
|
{
|
|
uint32_t high_tsn;
|
|
int fwd_tsn_seen = 0, data_processed = 0;
|
|
struct mbuf *m = *mm, *op_err;
|
|
char msg[SCTP_DIAG_INFO_LEN];
|
|
int un_sent;
|
|
int cnt_ctrl_ready = 0;
|
|
struct sctp_inpcb *inp = NULL, *inp_decr = NULL;
|
|
struct sctp_tcb *stcb = NULL;
|
|
struct sctp_nets *net = NULL;
|
|
|
|
SCTP_STAT_INCR(sctps_recvdatagrams);
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xE0, 1);
|
|
sctp_auditing(0, inp, stcb, net);
|
|
#endif
|
|
#if !defined(SCTP_WITH_NO_CSUM)
|
|
if (compute_crc != 0) {
|
|
uint32_t check, calc_check;
|
|
|
|
check = sh->checksum;
|
|
sh->checksum = 0;
|
|
calc_check = sctp_calculate_cksum(m, iphlen);
|
|
sh->checksum = check;
|
|
if (calc_check != check) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Bad CSUM on SCTP packet calc_check:%x check:%x m:%p mlen:%d iphlen:%d\n",
|
|
calc_check, check, (void *)m, length, iphlen);
|
|
stcb = sctp_findassociation_addr(m, offset, src, dst,
|
|
sh, ch, &inp, &net, vrf_id);
|
|
#if defined(INET) || defined(INET6)
|
|
if ((net != NULL) &&
|
|
(ch->chunk_type != SCTP_INITIATION) &&
|
|
(port != 0)) {
|
|
if (net->port == 0) {
|
|
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
|
|
}
|
|
net->port = port;
|
|
}
|
|
#endif
|
|
if (net != NULL) {
|
|
net->flowtype = mflowtype;
|
|
net->flowid = mflowid;
|
|
}
|
|
if ((inp != NULL) && (stcb != NULL)) {
|
|
sctp_send_packet_dropped(stcb, net, m, length, iphlen, 1);
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_INPUT_ERROR, SCTP_SO_NOT_LOCKED);
|
|
} else if ((inp != NULL) && (stcb == NULL)) {
|
|
inp_decr = inp;
|
|
}
|
|
SCTP_STAT_INCR(sctps_badsum);
|
|
SCTP_STAT_INCR_COUNTER32(sctps_checksumerrors);
|
|
goto out;
|
|
}
|
|
}
|
|
#endif
|
|
/* Destination port of 0 is illegal, based on RFC4960. */
|
|
if (sh->dest_port == 0) {
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
goto out;
|
|
}
|
|
stcb = sctp_findassociation_addr(m, offset, src, dst,
|
|
sh, ch, &inp, &net, vrf_id);
|
|
#if defined(INET) || defined(INET6)
|
|
if ((net != NULL) &&
|
|
(ch->chunk_type != SCTP_INITIATION) &&
|
|
(port != 0)) {
|
|
if (net->port == 0) {
|
|
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
|
|
}
|
|
net->port = port;
|
|
}
|
|
#endif
|
|
if (net != NULL) {
|
|
net->flowtype = mflowtype;
|
|
net->flowid = mflowid;
|
|
}
|
|
if (inp == NULL) {
|
|
SCTP_STAT_INCR(sctps_noport);
|
|
if (badport_bandlim(BANDLIM_SCTP_OOTB) < 0) {
|
|
goto out;
|
|
}
|
|
if (ch->chunk_type == SCTP_SHUTDOWN_ACK) {
|
|
sctp_send_shutdown_complete2(src, dst, sh,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
goto out;
|
|
}
|
|
if (ch->chunk_type == SCTP_SHUTDOWN_COMPLETE) {
|
|
goto out;
|
|
}
|
|
if (ch->chunk_type != SCTP_ABORT_ASSOCIATION) {
|
|
if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
|
|
((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
|
|
(ch->chunk_type != SCTP_INIT))) {
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
"Out of the blue");
|
|
sctp_send_abort(m, iphlen, src, dst,
|
|
sh, 0, op_err,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
}
|
|
}
|
|
goto out;
|
|
} else if (stcb == NULL) {
|
|
inp_decr = inp;
|
|
}
|
|
#ifdef IPSEC
|
|
/*-
|
|
* I very much doubt any of the IPSEC stuff will work but I have no
|
|
* idea, so I will leave it in place.
|
|
*/
|
|
if (inp != NULL) {
|
|
switch (dst->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (ipsec4_in_reject(m, &inp->ip_inp.inp)) {
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
goto out;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (ipsec6_in_reject(m, &inp->ip_inp.inp)) {
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
goto out;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "Ok, Common input processing called, m:%p iphlen:%d offset:%d length:%d stcb:%p\n",
|
|
(void *)m, iphlen, offset, length, (void *)stcb);
|
|
if (stcb) {
|
|
/* always clear this before beginning a packet */
|
|
stcb->asoc.authenticated = 0;
|
|
stcb->asoc.seen_a_sack_this_pkt = 0;
|
|
SCTPDBG(SCTP_DEBUG_INPUT1, "stcb:%p state:%x\n",
|
|
(void *)stcb, stcb->asoc.state);
|
|
|
|
if ((stcb->asoc.state & SCTP_STATE_WAS_ABORTED) ||
|
|
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
|
|
/*-
|
|
* If we hit here, we had a ref count
|
|
* up when the assoc was aborted and the
|
|
* timer is clearing out the assoc, we should
|
|
* NOT respond to any packet.. its OOTB.
|
|
*/
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
stcb = NULL;
|
|
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
goto out;
|
|
}
|
|
}
|
|
if (IS_SCTP_CONTROL(ch)) {
|
|
/* process the control portion of the SCTP packet */
|
|
/* sa_ignore NO_NULL_CHK */
|
|
stcb = sctp_process_control(m, iphlen, &offset, length,
|
|
src, dst, sh, ch,
|
|
inp, stcb, &net, &fwd_tsn_seen,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
if (stcb) {
|
|
/*
|
|
* This covers us if the cookie-echo was there and
|
|
* it changes our INP.
|
|
*/
|
|
inp = stcb->sctp_ep;
|
|
#if defined(INET) || defined(INET6)
|
|
if ((net != NULL) &&
|
|
(ch->chunk_type != SCTP_INITIATION) &&
|
|
(port != 0)) {
|
|
if (net->port == 0) {
|
|
sctp_pathmtu_adjustment(stcb, net->mtu - sizeof(struct udphdr));
|
|
}
|
|
net->port = port;
|
|
}
|
|
#endif
|
|
}
|
|
} else {
|
|
/*
|
|
* no control chunks, so pre-process DATA chunks (these
|
|
* checks are taken care of by control processing)
|
|
*/
|
|
|
|
/*
|
|
* if DATA only packet, and auth is required, then punt...
|
|
* can't have authenticated without any AUTH (control)
|
|
* chunks
|
|
*/
|
|
if ((stcb != NULL) &&
|
|
(stcb->asoc.auth_supported == 1) &&
|
|
sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks)) {
|
|
/* "silently" ignore */
|
|
SCTP_STAT_INCR(sctps_recvauthmissing);
|
|
goto out;
|
|
}
|
|
if (stcb == NULL) {
|
|
/* out of the blue DATA chunk */
|
|
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
goto out;
|
|
}
|
|
if (stcb->asoc.my_vtag != ntohl(sh->v_tag)) {
|
|
/* v_tag mismatch! */
|
|
SCTP_STAT_INCR(sctps_badvtag);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (stcb == NULL) {
|
|
/*
|
|
* no valid TCB for this packet, or we found it's a bad
|
|
* packet while processing control, or we're done with this
|
|
* packet (done or skip rest of data), so we drop it...
|
|
*/
|
|
goto out;
|
|
}
|
|
/*
|
|
* DATA chunk processing
|
|
*/
|
|
/* plow through the data chunks while length > offset */
|
|
|
|
/*
|
|
* Rest should be DATA only. Check authentication state if AUTH for
|
|
* DATA is required.
|
|
*/
|
|
if ((length > offset) &&
|
|
(stcb != NULL) &&
|
|
(stcb->asoc.auth_supported == 1) &&
|
|
sctp_auth_is_required_chunk(SCTP_DATA, stcb->asoc.local_auth_chunks) &&
|
|
!stcb->asoc.authenticated) {
|
|
/* "silently" ignore */
|
|
SCTP_STAT_INCR(sctps_recvauthmissing);
|
|
SCTPDBG(SCTP_DEBUG_AUTH1,
|
|
"Data chunk requires AUTH, skipped\n");
|
|
goto trigger_send;
|
|
}
|
|
if (length > offset) {
|
|
int retval;
|
|
|
|
/*
|
|
* First check to make sure our state is correct. We would
|
|
* not get here unless we really did have a tag, so we don't
|
|
* abort if this happens, just dump the chunk silently.
|
|
*/
|
|
switch (SCTP_GET_STATE(&stcb->asoc)) {
|
|
case SCTP_STATE_COOKIE_ECHOED:
|
|
/*
|
|
* we consider data with valid tags in this state
|
|
* shows us the cookie-ack was lost. Imply it was
|
|
* there.
|
|
*/
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_THRESHOLD_LOGGING) {
|
|
sctp_misc_ints(SCTP_THRESHOLD_CLEAR,
|
|
stcb->asoc.overall_error_count,
|
|
0,
|
|
SCTP_FROM_SCTP_INPUT,
|
|
__LINE__);
|
|
}
|
|
stcb->asoc.overall_error_count = 0;
|
|
sctp_handle_cookie_ack((struct sctp_cookie_ack_chunk *)ch, stcb, net);
|
|
break;
|
|
case SCTP_STATE_COOKIE_WAIT:
|
|
/*
|
|
* We consider OOTB any data sent during asoc setup.
|
|
*/
|
|
snprintf(msg, sizeof(msg), "OOTB, %s:%d at %s", __FILE__, __LINE__, __func__);
|
|
op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
|
|
msg);
|
|
sctp_handle_ootb(m, iphlen, offset, src, dst, sh, inp, op_err,
|
|
mflowtype, mflowid, inp->fibnum,
|
|
vrf_id, port);
|
|
goto out;
|
|
/* sa_ignore NOTREACHED */
|
|
break;
|
|
case SCTP_STATE_EMPTY: /* should not happen */
|
|
case SCTP_STATE_INUSE: /* should not happen */
|
|
case SCTP_STATE_SHUTDOWN_RECEIVED: /* This is a peer error */
|
|
case SCTP_STATE_SHUTDOWN_ACK_SENT:
|
|
default:
|
|
goto out;
|
|
/* sa_ignore NOTREACHED */
|
|
break;
|
|
case SCTP_STATE_OPEN:
|
|
case SCTP_STATE_SHUTDOWN_SENT:
|
|
break;
|
|
}
|
|
/* plow through the data chunks while length > offset */
|
|
retval = sctp_process_data(mm, iphlen, &offset, length,
|
|
inp, stcb, net, &high_tsn);
|
|
if (retval == 2) {
|
|
/*
|
|
* The association aborted, NO UNLOCK needed since
|
|
* the association is destroyed.
|
|
*/
|
|
stcb = NULL;
|
|
goto out;
|
|
}
|
|
data_processed = 1;
|
|
/*
|
|
* Anything important needs to have been m_copy'ed in
|
|
* process_data
|
|
*/
|
|
}
|
|
/* take care of ecn */
|
|
if ((data_processed == 1) &&
|
|
(stcb->asoc.ecn_supported == 1) &&
|
|
((ecn_bits & SCTP_CE_BITS) == SCTP_CE_BITS)) {
|
|
/* Yep, we need to add a ECNE */
|
|
sctp_send_ecn_echo(stcb, net, high_tsn);
|
|
}
|
|
if ((data_processed == 0) && (fwd_tsn_seen)) {
|
|
int was_a_gap;
|
|
uint32_t highest_tsn;
|
|
|
|
if (SCTP_TSN_GT(stcb->asoc.highest_tsn_inside_nr_map, stcb->asoc.highest_tsn_inside_map)) {
|
|
highest_tsn = stcb->asoc.highest_tsn_inside_nr_map;
|
|
} else {
|
|
highest_tsn = stcb->asoc.highest_tsn_inside_map;
|
|
}
|
|
was_a_gap = SCTP_TSN_GT(highest_tsn, stcb->asoc.cumulative_tsn);
|
|
stcb->asoc.send_sack = 1;
|
|
sctp_sack_check(stcb, was_a_gap);
|
|
} else if (fwd_tsn_seen) {
|
|
stcb->asoc.send_sack = 1;
|
|
}
|
|
/* trigger send of any chunks in queue... */
|
|
trigger_send:
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xE0, 2);
|
|
sctp_auditing(1, inp, stcb, net);
|
|
#endif
|
|
SCTPDBG(SCTP_DEBUG_INPUT1,
|
|
"Check for chunk output prw:%d tqe:%d tf=%d\n",
|
|
stcb->asoc.peers_rwnd,
|
|
TAILQ_EMPTY(&stcb->asoc.control_send_queue),
|
|
stcb->asoc.total_flight);
|
|
un_sent = (stcb->asoc.total_output_queue_size - stcb->asoc.total_flight);
|
|
if (!TAILQ_EMPTY(&stcb->asoc.control_send_queue)) {
|
|
cnt_ctrl_ready = stcb->asoc.ctrl_queue_cnt - stcb->asoc.ecn_echo_cnt_onq;
|
|
}
|
|
if (cnt_ctrl_ready || stcb->asoc.trigger_reset ||
|
|
((un_sent) &&
|
|
(stcb->asoc.peers_rwnd > 0 ||
|
|
(stcb->asoc.peers_rwnd <= 0 && stcb->asoc.total_flight == 0)))) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "Calling chunk OUTPUT\n");
|
|
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_CONTROL_PROC, SCTP_SO_NOT_LOCKED);
|
|
SCTPDBG(SCTP_DEBUG_INPUT3, "chunk OUTPUT returns\n");
|
|
}
|
|
#ifdef SCTP_AUDITING_ENABLED
|
|
sctp_audit_log(0xE0, 3);
|
|
sctp_auditing(2, inp, stcb, net);
|
|
#endif
|
|
out:
|
|
if (stcb != NULL) {
|
|
SCTP_TCB_UNLOCK(stcb);
|
|
}
|
|
if (inp_decr != NULL) {
|
|
/* reduce ref-count */
|
|
SCTP_INP_WLOCK(inp_decr);
|
|
SCTP_INP_DECR_REF(inp_decr);
|
|
SCTP_INP_WUNLOCK(inp_decr);
|
|
}
|
|
return;
|
|
}
|
|
|
|
#ifdef INET
|
|
void
|
|
sctp_input_with_port(struct mbuf *i_pak, int off, uint16_t port)
|
|
{
|
|
struct mbuf *m;
|
|
int iphlen;
|
|
uint32_t vrf_id = 0;
|
|
uint8_t ecn_bits;
|
|
struct sockaddr_in src, dst;
|
|
struct ip *ip;
|
|
struct sctphdr *sh;
|
|
struct sctp_chunkhdr *ch;
|
|
int length, offset;
|
|
|
|
#if !defined(SCTP_WITH_NO_CSUM)
|
|
uint8_t compute_crc;
|
|
|
|
#endif
|
|
uint32_t mflowid;
|
|
uint8_t mflowtype;
|
|
uint16_t fibnum;
|
|
|
|
iphlen = off;
|
|
if (SCTP_GET_PKT_VRFID(i_pak, vrf_id)) {
|
|
SCTP_RELEASE_PKT(i_pak);
|
|
return;
|
|
}
|
|
m = SCTP_HEADER_TO_CHAIN(i_pak);
|
|
#ifdef SCTP_MBUF_LOGGING
|
|
/* Log in any input mbufs */
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
|
|
sctp_log_mbc(m, SCTP_MBUF_INPUT);
|
|
}
|
|
#endif
|
|
#ifdef SCTP_PACKET_LOGGING
|
|
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LAST_PACKET_TRACING) {
|
|
sctp_packet_log(m);
|
|
}
|
|
#endif
|
|
SCTPDBG(SCTP_DEBUG_CRCOFFLOAD,
|
|
"sctp_input(): Packet of length %d received on %s with csum_flags 0x%b.\n",
|
|
m->m_pkthdr.len,
|
|
if_name(m->m_pkthdr.rcvif),
|
|
(int)m->m_pkthdr.csum_flags, CSUM_BITS);
|
|
mflowid = m->m_pkthdr.flowid;
|
|
mflowtype = M_HASHTYPE_GET(m);
|
|
fibnum = M_GETFIB(m);
|
|
SCTP_STAT_INCR(sctps_recvpackets);
|
|
SCTP_STAT_INCR_COUNTER64(sctps_inpackets);
|
|
/* Get IP, SCTP, and first chunk header together in the first mbuf. */
|
|
offset = iphlen + sizeof(struct sctphdr) + sizeof(struct sctp_chunkhdr);
|
|
if (SCTP_BUF_LEN(m) < offset) {
|
|
if ((m = m_pullup(m, offset)) == NULL) {
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
return;
|
|
}
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
sh = (struct sctphdr *)((caddr_t)ip + iphlen);
|
|
ch = (struct sctp_chunkhdr *)((caddr_t)sh + sizeof(struct sctphdr));
|
|
offset -= sizeof(struct sctp_chunkhdr);
|
|
memset(&src, 0, sizeof(struct sockaddr_in));
|
|
src.sin_family = AF_INET;
|
|
src.sin_len = sizeof(struct sockaddr_in);
|
|
src.sin_port = sh->src_port;
|
|
src.sin_addr = ip->ip_src;
|
|
memset(&dst, 0, sizeof(struct sockaddr_in));
|
|
dst.sin_family = AF_INET;
|
|
dst.sin_len = sizeof(struct sockaddr_in);
|
|
dst.sin_port = sh->dest_port;
|
|
dst.sin_addr = ip->ip_dst;
|
|
length = ntohs(ip->ip_len);
|
|
/* Validate mbuf chain length with IP payload length. */
|
|
if (SCTP_HEADER_LEN(m) != length) {
|
|
SCTPDBG(SCTP_DEBUG_INPUT1,
|
|
"sctp_input() length:%d reported length:%d\n", length, SCTP_HEADER_LEN(m));
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
goto out;
|
|
}
|
|
/* SCTP does not allow broadcasts or multicasts */
|
|
if (IN_MULTICAST(ntohl(dst.sin_addr.s_addr))) {
|
|
goto out;
|
|
}
|
|
if (SCTP_IS_IT_BROADCAST(dst.sin_addr, m)) {
|
|
goto out;
|
|
}
|
|
ecn_bits = ip->ip_tos;
|
|
#if defined(SCTP_WITH_NO_CSUM)
|
|
SCTP_STAT_INCR(sctps_recvnocrc);
|
|
#else
|
|
if (m->m_pkthdr.csum_flags & CSUM_SCTP_VALID) {
|
|
SCTP_STAT_INCR(sctps_recvhwcrc);
|
|
compute_crc = 0;
|
|
} else {
|
|
SCTP_STAT_INCR(sctps_recvswcrc);
|
|
compute_crc = 1;
|
|
}
|
|
#endif
|
|
sctp_common_input_processing(&m, iphlen, offset, length,
|
|
(struct sockaddr *)&src,
|
|
(struct sockaddr *)&dst,
|
|
sh, ch,
|
|
#if !defined(SCTP_WITH_NO_CSUM)
|
|
compute_crc,
|
|
#endif
|
|
ecn_bits,
|
|
mflowtype, mflowid, fibnum,
|
|
vrf_id, port);
|
|
out:
|
|
if (m) {
|
|
sctp_m_freem(m);
|
|
}
|
|
return;
|
|
}
|
|
|
|
#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
|
|
extern int *sctp_cpuarry;
|
|
|
|
#endif
|
|
|
|
int
|
|
sctp_input(struct mbuf **mp, int *offp, int proto SCTP_UNUSED)
|
|
{
|
|
struct mbuf *m;
|
|
int off;
|
|
|
|
m = *mp;
|
|
off = *offp;
|
|
#if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
|
|
if (mp_ncpus > 1) {
|
|
struct ip *ip;
|
|
struct sctphdr *sh;
|
|
int offset;
|
|
int cpu_to_use;
|
|
uint32_t flowid, tag;
|
|
|
|
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
|
|
flowid = m->m_pkthdr.flowid;
|
|
} else {
|
|
/*
|
|
* No flow id built by lower layers fix it so we
|
|
* create one.
|
|
*/
|
|
offset = off + sizeof(struct sctphdr);
|
|
if (SCTP_BUF_LEN(m) < offset) {
|
|
if ((m = m_pullup(m, offset)) == NULL) {
|
|
SCTP_STAT_INCR(sctps_hdrops);
|
|
return (IPPROTO_DONE);
|
|
}
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
sh = (struct sctphdr *)((caddr_t)ip + off);
|
|
tag = htonl(sh->v_tag);
|
|
flowid = tag ^ ntohs(sh->dest_port) ^ ntohs(sh->src_port);
|
|
m->m_pkthdr.flowid = flowid;
|
|
M_HASHTYPE_SET(m, M_HASHTYPE_OPAQUE);
|
|
}
|
|
cpu_to_use = sctp_cpuarry[flowid % mp_ncpus];
|
|
sctp_queue_to_mcore(m, off, cpu_to_use);
|
|
return (IPPROTO_DONE);
|
|
}
|
|
#endif
|
|
sctp_input_with_port(m, off, 0);
|
|
return (IPPROTO_DONE);
|
|
}
|
|
|
|
#endif
|