#!/usr/bin/perl
#
# SCTP Conformance Test Suite Implementation
# (C) Copyright Fujitsu Ltd. 2008, 2009
#
# This file is part of the SCTP Conformance Test Suite implementation.
#
# The SCTP Conformance Test Suite implementation is free software;
# you can redistribute it and/or modify it under the terms of
# the GNU General Public License version 2 as published by
# the Free Software Foundation.
#
# The SCTP Conformance Test Suite implementation is distributed in the
# hope that it will be useful, but WITHOUT ANY WARRANTY; without even
# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
# PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU CC; see the file COPYING.  If not, write to
# the Free Software Foundation, 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# Please send any bug reports or fixes you make to the
# email address(es):
#    networktest sctp <networktest-sctp@lists.sourceforge.net>
#
# Or submit a bug report through the following website:
#    http://networktest.sourceforge.net/
#
# Written or modified by:
#    Hiroaki Kago <linuxsctp-kg@ml.css.fujitsu.com>
#    Wei Yongjun <yjwei@cn.fujitsu.com>
#
# Any bugs reported given to us we will try to fix... any fixes shared will
# be incorporated into the next SCTP release.
#
##############################################################################
BEGIN {	$V6evalTool::TestVersion = '$Name: REL_1_0_0 $'; }

use lib "../common";
use V6evalTool;
use SCTP;

%pktdesc = ();

$IF0 = Link0;

vCapture($IF0);

sctpCheckEnv($IF0);

$MAX_INIT_RETRANS = $SCTP::CONF{"MAX_INIT_RETRANS"};
$TIMEOUT = $SCTP::CONF{"RTO_MAX"}  + 5;

sctpStartClient($IF0);

%ret = vWarpRecv($IF0, 10, 0, 0, sctp_chunk_init_rcv);
if($ret{status} != 0 || $ret{recvFrame} ne 'sctp_chunk_init_rcv') {
	vLogHTML('Cannot receive SCTP CHUNK_INIT<BR>');
	vLogHTML('<FONT COLOR="#00FF00">NG</FONT>'); 
	exit $V6evalTool::exitFail;
}

vListen($IF0);

vLogHTML('<B>================ Main Test =================</B>');

%ret = vWarpRecv($IF0, 10, 0, 0, sctp_chunk_cookie_echo_rcv);
if($ret{status} != 0 || $ret{recvFrame} ne 'sctp_chunk_cookie_echo_rcv') {
	vLogHTML('Cannot receive SCTP CHUNK_COOKIE_ECHO<BR>');
	vLogHTML('<FONT COLOR="#00FF00">NG</FONT>'); 
	exit $V6evalTool::exitFail;
}

$retrans = 0;

while($ret{status} != 1) {
	%ret = vWarpRecv($IF0, $TIMEOUT, 0, 0, sctp_chunk_cookie_echo_rcv, sctp_chunk_abort_rcv);

	last if($ret{status} == 0 && $ret{recvFrame} eq 'sctp_chunk_abort_rcv');
	if($ret{status} == 0 && $ret{recvFrame} eq 'sctp_chunk_cookie_echo_rcv') {
		$retrans++;
	}
}

if($MAX_INIT_RETRANS != $retrans) {
	vLogHTML("Received SCTP CHUNK_COOKIE_ECHO $retrans times, but expect $MAX_INIT_RETRANS times<BR>");
	vLogHTML('<FONT COLOR="#00FF00">NG</FONT>'); 
	exit $V6evalTool::exitFail;	
}

vLogHTML(OK);
exit $V6evalTool::exitPass;

######################################################################
__END__

=head1 NAME

  T1CookieTimeout2.seq - Retransmit times for failure to receive COOKIE-ACK (retransmitted INIT message)

=head1 PURPOSE

  To check that if COOKIE-ECHO is retransmitted for 'Max.Init.Retransmits' times
  then the endpoint MUST abort the initialization process and report the error to
  the SCTP user.

=head1 SYNOPSIS

=begin html
<PRE>
  <A HREF="./T1CookieTimeout2.seq">./T1CookieTimeout2.seq</A> [-tooloption ...] -pkt <A HREF="./T1CookieTimeout2.def">./T1CookieTimeout2.def</A>
    -tooloption : v6eval tool option
  See Also: <A HREF="../common/STD_PKT_COMMON.def">../common/STD_PKT_COMMON.def</A>
            <A HREF="../common/SCTP_COMMON.def">../common/SCTP_COMMON.def</A>
</PRE>

=end html

=head1 PRE-TEST CONDITION

  Association is not established between endpoint A and B. Arrange the 
  data in Endpoint A such that COOKIE-ACK is not sent in response to 
  COOKIE-ECHO message.

=head1 TEST PROCEDURE

  Endpoint A                           Endpoint B                ULP
  (CLOSED)                             (CLOSED)

                                                   <-----    Associate
                <----------------       INIT
  Don't send                            Start T1-Init timer
  INIT-ACK                                |
                                          | T1-INIT timer Expires
                                          |
                <----------------       INIT

  INIT=ACK      ---------------->

                <----------------       COOKIE-ECHO
  Don't send                            Start T1-cookie timer
  COOKIE-ACK message                          |
                                              |   T1-cookie timer expires
                                              |
                <----------------    	COOKIE-ECHO                       
                                          . Retransmit COOKIE-ECHO
                                          . 'Max.Init.Retransmits' times
                                          . 
                <----------------       ABORT
                                             Communications Lost ------->

  TEST DESCRIPTION:

  1. Attempt to make an association from endpoint B to endpoint A by 
     Sending INIT message from endpoint B.
     Record the message sequence using a signal emulator.
  2. If INIT message is transmitted for 1 times without getting an
     INIT-ACK, send INIT-ACK message.
  3. Receive COOKIE-ECHO message from endpoint B and not send COOKIE-ACK
     to response OOKIE-ECHO message.
  4. Check A: If COOKIE-ECHO message is transmitted for MAX.INIT.RETRANS 
     times without getting an COOKIE-ACK, Association is aborted and 
     upper layers are reported of this.

=head1 NOTE

  None

=head1 REFERENCE

  RFC 4960

  4.  SCTP Association State Diagram

    Notes:

=begin html
<PRE>
    3)  If the T1-cookie timer expires, the endpoint MUST retransmit
        COOKIE ECHO and restart the T1-cookie timer without changing
        state.  <B>This MUST be repeated up to 'Max.Init.Retransmits' times.
        After that, the endpoint MUST abort the initialization process
        and report the error to the SCTP user.</B>
</PRE>

=end html