#!/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 = (
	sctp_chunk_shutdown_bad_len	=> "Send SCTP CHUNK_SHUTDOWN (Chunk Length is set to zero)",
	sctp_chunk_abort		=> "Recv SCTP CHUNK_ABORT (Protocol Violation)",
);

$IF0 = Link0;

vCapture($IF0);

sctpCheckEnv($IF0);

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

# This packet may cause Remote System dead loop
vSend($IF0, sctp_chunk_shutdown_bad_len);

%ret = vWarpRecv($IF0, 30, 0, 0, sctp_chunk_abort);
if($ret{status} != 0 || $ret{recvFrame} ne sctp_chunk_abort) {
	vLogHTML('Cannot receive SCTP CHUNK_ABORT<BR>');
	vLogHTML('<FONT COLOR="#00FF00">NG</FONT>'); 
	exit $V6evalTool::exitFail;
}

# If we can ping to Remote System, this problem has been fixed
sctpCheckEnv($IF0);

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

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

=head1 NAME

  OotbShutWithZeroLength.seq - OOTB SHUTDOWN chunk is received with chunk length set to zero

=head1 PURPOSE

  To check that if OOTB SHUTDOWN chunk is received with chunk length set to
  zero, the endpoint should response with ABORT message and error cause is
  set to Protocol Violation.

=head1 SYNOPSIS

=begin html
<PRE>
  <A HREF="./OotbShutWithZeroLength.seq">./OotbShutWithZeroLength.seq</A> [-tooloption ...] -pkt <A HREF="./OotbShutWithZeroLength.def">./OotbShutWithZeroLength.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 data 
  in endpoint A such that SHUTDOWN chunk with chunk length set to zero
  is sent to endpoint B.

=head1 TEST PROCEDURE

  Endpoint A                           Endpoint B                ULP
  (CLOSED)                             (CLOSED)

  SHUTDOWN      ----------------->
  (with chunk length set to zero)
                <-----------------      ABORT
                                        (Protocol Violation)

  TEST DESCRIPTION:

  1. From endpoint A, send valid SHUTDOWN message to endpoint B,
     when there is no association between them.
  2. Check A: ABORT should be received at endpoint A.
  3. Check B: Error cause in ABORT is set to "Protocol Violation".
  4. Check C: Remote System not enter dead loop.

=head1 NOTE

  None

=head1 REFERENCE

  RFC 4960

  8.4.  Handle "Out of the Blue" Packets

=begin html
<PRE>
    <B>An SCTP packet is called an "out of the blue" (OOTB) packet if it is
    correctly formed (i.e., passed the receiver's CRC32c check; see
    Section 6.8), but the receiver is not able to identify the
    association to which this packet belongs.</B>
</PRE>

=end html

    The receiver of an OOTB packet MUST do the following:

    1)  If the OOTB packet is to or from a non-unicast address, a
        receiver SHOULD silently discard the packet.  Otherwise,