#!/usr/bin/perl
#
# $Copyright$
#
# $Id: FH_Reverse.seq,v 1.1.1.1 2000/10/31 22:39:20 sekiya Exp $
#
######################################################################
BEGIN {
	$V6evalTool::TestVersion = '$Name:  $';
}

use V6evalTool;

%pktdesc = (
	echo_request		=> 'Send Echo Request (Preparation)',
	echo_reply		=> 'Recv Echo Reply',
	ns			=> 'Recv Neighbor Solicitation',
	na			=> 'Send Neighbor Advertisement',
	echo_request_1st	=> 'Send Echo Request (1st fragment)',
	echo_request_2nd	=> 'Send Echo Request (2nd fragment)',
);

$IF = Link0;

vCapture($IF);

#----- preparation

vLogHTML('<B>Begin Preparation</B>');

vSend($IF, echo_request);

%ret = vRecv($IF, 5, 0, 0, ns, echo_reply);
if ($ret{status} != 0) {
	vLogHTML('<FONT COLOR="#FF0000">NG</FONT>');
	exit $V6evalTool::exitFail;
}
if ($ret{recvFrame} eq 'ns') {
	vSend($IF, na);
	%ret = vRecv($IF, 5, 0, 0, echo_reply);
	if ($ret{status} != 0) {
		vLogHTML('<FONT COLOR="#FF0000">NG</FONT>');
		exit $V6evalTool::exitFail;
	}
}
if ($ret{recvFrame} ne 'echo_reply') {
	vLogHTML('<FONT COLOR="#FF0000">NG</FONT>');
	exit $V6evalTool::exitFail;
}

vSend($IF, na);

vLogHTML('<B>End Preparation</B>');

#----- main test
vSend($IF, echo_request_2nd);

vSend($IF, echo_request_1st);

%ret = vRecv($IF, 5, 0, 0, echo_reply);
if ($ret{status} == 0 && $ret{recvFrame} eq 'echo_reply') {
	vLogHTML('OK');
	exit $V6evalTool::exitPass;
}

vLogHTML('<FONT COLOR="#FF0000">NG</FONT>');
vSleep(65, "Discard Unexpected 'ICMP Time Exceeded' message (60+5 sec)");
exit $V6evalTool::exitFail;


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

=head1 NAME

  FH_Reverse - check Fragment Reassembly (reverse order)

=head1 TARGET

  Host and Router

=head1 SYNOPSIS

=begin html
<PRE>
  <A HREF="./FH_Reverse.seq">FH_Reverse.seq</A> [-tooloption ...] -pkt <A HREF="./Fragment.def">Fragment.def</A>
    -tooloption : v6eval tool option
</PRE>

=end html

=head1 INITIALIZATION

  1. Ping to Target (create Neighbor Cache Entries, if not exist)
  2. Override Neighbor Cache Entries

=head1 TEST PROCEDURE

  Tester                      Target
    |                           |
    |-------------------------->|
    |   Echo Request (2nd)      |
    |                           |
    |                           |
    |-------------------------->|
    |   Echo Request (1st)      |
    |                           |
    |                           |
    |<--------------------------|
    |   Echo Reply              |
    |                           |
    |                           |
    v                           v


  1. Send Echo Request (2nd fragment)
  2. Send Echo Request (1st fragment)
  3. Receive Echo Reply

=head1 JUDGEMENT

  PASS: Echo Reply Received

=head1 SEE ALSO

  perldoc V6evalTool

=cut