sctp-dm-o-4-4.pkt

//
// Copyright (c) 2015 Julian Cordes, Nils Frenking, Jens Hoelscher
// Copyright (c) 2015 Michael Tuexen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//

// Create a non-blocking socket
 0.0 socket(..., SOCK_STREAM, IPPROTO_SCTP) = 3
+0.0 bind(3, ..., ...) = 0
+0.0 fcntl(3, F_GETFL) = 0x2 (flags O_RDWR)
+0.0 fcntl(3, F_SETFL, O_RDWR|O_NONBLOCK) = 0
// Initiate the association setup
+0.1 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)
+0.0 > sctp: INIT[flgs=0, tag=1, a_rwnd=..., os=..., is=..., tsn=1, ...]
+0.1 < sctp: INIT_ACK[flgs=0, tag=2, a_rwnd=1500, os=1, is=1, tsn=1, STATE_COOKIE[len=4, val=...]]
+0.0 > sctp: COOKIE_ECHO[flgs=0, len=4, val=...]
+0.1 < sctp: COOKIE_ACK[flgs=0]
+0.0 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
// Inject duplicate COOKIE_ACK
+0.1 < sctp: COOKIE_ACK[flgs=0]
+0.1 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
// Write some data to verify that COOKIE_ACK was ignored
+0.1 write(3, ..., 1000) = 1000
+0.0 > sctp: DATA[flgs=BE, len=1016, tsn=1, sid=0, ssn=0, ppid=0]
+0.1 < sctp: SACK[flgs=0, cum_tsn=1, a_rwnd=1500, gaps=[], dups=[]]
// Tear down the association
+0.0 close(3) = 0
+0.0 > sctp: SHUTDOWN[flgs=0, cum_tsn=0]
+0.1 < sctp: SHUTDOWN_ACK[flgs=0]
+0.0 > sctp: SHUTDOWN_COMPLETE[flgs=0]