#!/usr/bin/perl
#
# $Copyright$
#
# $TAHI: ct/icmp/SAD_a_dst_unr_LLA.seq,v 1.6 2001/10/05 06:38:50 masaxmasa Exp $
########################################################################
BEGIN { $V6evalTool::TestVersion = '$Name:  $'; }
use V6evalTool;
use icmp;

$IF=Link0;

checkNUT(hostrouter);

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

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 ***");
}

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

vSend($IF, ipv6_udp_tn2nut_unknown_port);

%ret=vRecv($IF,5,0,0,destination_unreachable_nut2tn_LLA_code_four);
				

if( $ret{status} !=0) {
        vLog("TN can not receive ICMPv6 error message from NUT");
        goto error;
}elsif($ret{recvFrame} eq 'destination_unreachable_nut2tn_LLA_code_four') {
        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

	SAD_a_dst_unr_LLA.seq - check Message Processing Rules (ICMPv6
	 Destination Unreachable , link local address)

=head1 TARGET

	Host and Router

=head1 SYNOPSIS

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


=head1 INITIALIZATION

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

=head1 TEST PROCEDURE

	This test verifies that the message source address determination ,
	
    (a) 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.
	 === UDP packet  ===>
		src address : TN link local address
		dst address : NUT link local address
			port number is not used in NUT
	2.
	<< JUDGMENT >>

	 <=== ICMPv6 Destination Unreachable ===
		src address : NUT link local address
		dst address : TN link local address
             Code is 4

=head1 JUDGMENT

	<< PASS >>
		NUT send ICMPv6 Destination Unreachable.
		

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


=head1 SEE ALSO

	  perldoc V6evalTool

=cut