#!/usr/bin/perl
#
# $Copyright$
#
# $TAHI: ct/icmp/receiveEchoRequest_sendEchoReply_validity_check_checksum.seq,v 1.7 2001/10/05 06:38:51 masaxmasa Exp $
########################################################################
BEGIN { $V6evalTool::TestVersion = '$Name:  $ '; }
use V6evalTool;
use icmp;

checkNUT(hostrouter);

$IF=Link0;

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

vCapture($IF);

#
# This part is just for comparison 
#
vLogHTML("<B>This is very tricky, but send echo-reply (src=NUT/dst=TN) ".
	 "to get valid checksum value.</B><BR>");
%ret1=vSend($IF,echo_reply_nut2tn_LLA);
$Valid_Checksum=$ret1{"Frame_Ether.Packet_IPv6.ICMPv6_EchoReply.Checksum"};

#vSleep(1);
vClear($IF);

#vSleep(1);
$ret=makeNCE_TN_LLA();
if( $ret !=0) {
    vLog("NUT can not be initialized !!");
        goto error;
}else {
	vLog("*** TN can make TN's link local address NCE in TN ***");
}

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

vSend($IF, echo_request_tn2nut_LLA);

%ret=vRecv($IF,5,0,0,echo_reply_nut2tn_LLA_for_comparison);

if( $ret{status} !=0) {
	vLog("TN can not receive Echo Reply from NUT");
	goto error;
}elsif($ret{recvFrame} eq 'echo_reply_nut2tn_LLA_for_comparison') {
	if ($ret{"Frame_Ether.Packet_IPv6.ICMPv6_EchoReply.Checksum"} eq
			$Valid_Checksum) {
		vLog("Checksum value included in NUT's sending packet is valid");
		vLog("OK");
		exit $V6evalTool::exitPass;
	}else {
		vLog("Checksum value included in NUT's sending packet is invalid");
		goto error;
	}
}else {
	vLog("TN receive unexpected packets from NUT");
	goto error;
}	
	
error:

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



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

=head1 NAME

	receiveEchoRequest_sendEchoReply_validity_check_checksum.seq 
		- check that sending and receiving Echo Request 
				and Echo Reply (check sum)

=head1 TARGET

	Host and Router

=head1 SYNOPSIS

	receiveEchoRequest_sendEchoReply_validity_check_checksum.seq 
	[-tooloption ...] -p 
	receiveEchoRequest_sendEchoReply_validity_check_checksum.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 Echo Request 
	and received ICMPv6 Echo Reply. 
	

	TN			NUT

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

	1.
	 === ICMPv6 Echo Request ===>
			src address : TN link local address
			dst address : NUT link local address        
	2.
	<< JUDGMENT >>

	 <=== ICMPv6 Echo Reply ===
			src address : NUT link local address
			dst address : TN link local address        
          

=head1 JUDGMENT

	<< PASS >>
		Check Sum which is in a received packet is valid
		

	<< FAIL >>	
		Check Sum which is in a received packet is invalid


=head1 SEE ALSO

	  perldoc V6evalTool

=cut