#!/usr/bin/perl
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# $TAHI: ct/tunnel/decapsulation_router.seq,v 1.9 2001/10/05 06:39:22 masaxmasa Exp $
########################################################################
BEGIN { $V6evalTool::TestVersion = '$Name: REL_2_1_2 $'; }
use V6evalTool;
use tunnel;

checkNUT(router);

$IF=$tunnel::IF_ID_0;
$IF1=$tunnel::IF_ID_1;

vCapture($IF);
vCapture($IF1);

$ret=makeNCE_TN_LLA();
if( $ret !=0) {
        vLogHTML("<FONT COLOR=#FF0000><H4>NUT can not be initialized !!</H4></FONT>");
        goto error;
}else {
        vLogHTML("<H4>--- TN can make TN's link local address NCE in TN ---</H4>");
}

$ret=makeNCE_TN_GA();
if( $ret !=0) {
        vLogHTML("<FONT COLOR=#FF0000><H4>NUT can not be initialized !!</H4></FONT>");
        goto error;
}else {
        vLogHTML("<H4>--- TN can make TN's global address NCE in TN ---</H4>");
}

$ret=makeARPTable_LINK1();
if( $ret !=0) {
        vLogHTML("<FONT COLOR=#FF0000><H4>NUT can not convert v4 address to Ethernet address !!</H4></FONT>");
        goto error;
}else {
        vLogHTML("<H4>--- NUT can convert v4 address to Ethernet address ---</H4>");
}

vSend($IF1, v6overv4_echo_request_LINK1_tn2nut);

%ret=vRecv($IF,5,0,0,v6_echo_request_LINK0_nut2tn_OFFLINK);
if( $ret{status} !=0) {
	vLogHTML("<FONT COLOR=#FF0000><H4>TN can not receive Echo Reply from NUT</H4></FONT><BR>");
	goto error;
}else {
	vLogHTML("<H4>TN can receive Echo Reply from NUT</H4>");
	vLogHTML("<H3>OK</H3>");
	exit $V6evalTool::exitPass;
}	

error:

vLogHTML("<FONT COLOR=#FF0000><H3>NG</H3></FONT>");
exit $V6evalTool::exitFail;

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

=head1 NAME

	decapsulation_router.seq - Verify that decapsulate IPv6 
	datagram in IPv4 packet

=head1 TARGET

	Router

=head1 SYNOPSIS

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

=head1 INITIALIZATION

=begin html
<PRE>
	Before this test starts, run <A HREF="initialize.html">initialize.seq</A>.
</PRE>

=end html

=head1 TEST PROCEDURE

	This test verifies that NUT decapsulate the IPv6 packet in a 
	IPv4 packet
	
	Network Topology

	Link0	
	--------------------------
	    |               |
	   TN              NUT
	    |               |	
	--------------------------
	Link1


	
	TN -- (Link0) -- NUT		TN -- (Link1) -- NUT

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

	1.
	                            ===================>
	IPv4 packet encapsulating IPv6 packet
		Outer Header (IPv4)     
			src address : Off-link IPv4 address
			dst address : NUT Link1 IPv4 address        
		Inner Header (IPv6)     
			src address : Off-link IPv6 global address
			dst address : TN LINK0 IPv6 global address        

	2.
	In NUT, received IPv4 packet is decapsulated, and forward 
	ICMPv6 Echo Request packet.   
	3.
	<< JUDGMENT >>

	<===================
	ICMPv6 Echo Reply
		IPv6 Header
			src address : Off-link IPv6 global address
			dst address : TN LINK0 IPv6 global address        

=head1 JUDGMENT

	<< PASS >>
		NUT received ICMPv6 Echo Reply
		

	<< FAIL >>	
		NUT did not receive ICMPv6 Echo Reply


=head1 SEE ALSO

	perldoc V6evalTool

=cut