#!/usr/bin/perl
#
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# $TAHI: ct/icmp/Dst_Unreach_0_Global.seq,v 1.1 2003/03/26 07:47:29 masaxmasa Exp $
#----------------------------------------------------------------------

BEGIN { $V6evalTool::TestVersion = '$Name: REL_2_1_2 $'; }
use V6evalTool;
use icmp;

$IF = Link0;

checkNUT(router);

#-----------------------------------------------------------------------
# Initialization
#-----------------------------------------------------------------------

vLogHTML("<FONT SIZE=\"+1\">Initialization</FONT><BR>");

vCapture($IF);

$ret = mkNCE_Link();

if ($ret != 0) {
	vLog("*** NUT can not be initialized !! ***");
	goto error;
}
else {
	vLog("TN created the entry of TN's link-local address to Neighbor cache of NUT.");
};

$ret = mkNCE_Global();

if ($ret != 0) {
	vLog("*** NUT can not be initialized !! ***");
	goto error;
}
else {
	vLog("TN created the entry of TN's global address to Neighbor cache of NUT.");
};

#-----------------------------------------------------------------------
# Test
#-----------------------------------------------------------------------
%pktdesc = (
	echo_request	=> 'Send Echo Request to an offlink host',
	dst_unreach	=> 'Receive Destination Unreachable (No Route)'
);

vLogHTML("<FONT SIZE=\"+1\">Test</FONT><BR>");

vSend($IF, echo_request);

%ret = vRecv($IF, 5, 0, 0, dst_unreach);

if ($ret{status} != 0) {
	vLog("TN can not receive ICMPv6 error message from NUT");
	goto error;
}
elsif ($ret{recvFrame} eq 'dst_unreach') {
	vLog("TN can receive ICMPv6 error message from NUT");
	vLog("OK");
	exit($V6evalTool::exitPass);
}
else {
	vLog("TN receive unexpected packets from NUT");
	goto error;
};

error:

vLog("FAIL");
exit($V6evalTool::exitFail);


#----------------------------------------------------------------------

__END__

=head1 NAME

	Dst_Unreach_0_Global.seq - check ICMPv6 Destination 
	Unreachable code 0 

=head1 TARGET

	Router

=head1 SYNOPSIS

	Dst_Unreach_0_Global.seq [-tooloption ...] -p 
	Dst_Unreach_0_Global.def

=head1 INITIALIZATION

	When test starts, states of Neighbor Cache Entry for TN's 
	addresses are reachable.

=head1 TEST PROCEDURE

	This test verifies that NUT sends valid ICMPv6 Destination 
	Unreachable (code 0) in response to a packet which can not 
	be delivered to destination address because NUT have no route.
	And this test verifies that the message processing rule ,

	If the message is a response to a message sent to one of the
	node's unicast addresses, the Source Address of the reply must
	be that same address.
	

	TN			NUT

	---------------------------

	1.
	 === Echo Request  ===>
		src address : TN global address
		dst address : offlink address
	2.
	<< JUDGMENT >>

	 <=== ICMPv6 Destination Unreachable ===
		Code is 0

=head1 JUDGMENT

	<< PASS >>
		NUT send ICMPv6 Destination Unreachable.
		

	<< FAIL >>	
		NUT do not send ICMPv6 Destination Unreachable.


=head1 SEE ALSO

	  perldoc V6evalTool

=cut