#!/usr/bin/perl
#
# $Copyright$
#
# $Id: destination_unreachable_code_zero.seq,v 1.1.1.1 2000/10/31 22:38:50 sekiya Exp $
########################################################################
BEGIN { $V6evalTool::TestVersion = '$Name:  $'; }
use V6evalTool;
use icmp;

$IF=Link0;

checkNUT(router);

vCapture($IF);

$ret=makeNCE_TN_LLA();
if( $ret !=0) {
        vLog("NUT can not be initialized !!");
        exit $V6evalTool::exitFail;
}else {
        vLog("*** TN can make TN's link local address NCE in TN ***");
}
$ret=makeNCE_TN_GA();
if( $ret !=0) {
        vLog("NUT can not be initialized !!");
        exit $V6evalTool::exitFail;
}else {
        vLog("*** TN can make TN's global address NCE in TN ***");
}

vSend($IF, echo_request_tn2nut_OFFLINKA);

%ret=vRecv($IF,$icmp::wait_address_resolution,0,0,destination_unreachable_nut2tn_any_code_zero);

if( $ret{status} !=0) {
        vLog("TN can not receive ICMPv6 error message from NUT");
        goto error;
}elsif($ret{recvFrame} eq 'destination_unreachable_nut2tn_any_code_zero') {
        vLog("TN can receive Echo Reply 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

	destination_unreachable_code_zero.seq - check ICMPv6 Destination 
	Unreachable code 0 

=head1 TARGET

	Host and Router

=head1 SYNOPSIS

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


=head1 INITIALIZATION

	When test stars, 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.
	

	TN			NUT

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

	1.
	 === Echo Request ===>
			src address : TN global address
			dst address : OFFLINK address 
	2.
	 NUT has no route for this echo request packet.
         
	3.
	<< 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