#!/usr/bin/perl
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# $TAHI: ct/nd.p2/V6LC_2_2_15_F.seq,v 1.7 2009/01/05 06:39:39 akisada Exp $
#
########################################################################

use rdisc;

BEGIN {}
END   {}

if($V6evalTool::NutDef{'Type'} ne 'host') {
	exitHostOnly($Link0);
	#NOTREACHED
}

vCapture($Link0);

$pktdesc{'local_ra'} =
	'    Send RA w/ SLL (same): '.
	'TR1 (link-local) -> all-nodes multicast address';

unless(v6LC_2_2_15_F($Link0)) {
	exitFail($Link0);
	#NOTREACHED
}

exitPass($Link0);
#NOTREACHED



#
# perldoc
#
########################################################################
__END__

=head1 Title

  Test v6LC.2.2.16: Router Advertisement Processing, Neighbor Cache (Hosts Only)
  Part G: RA with SLLA unchanged, NCE PROBE 

=head1 Purpose

  Verify that a host properly updates its Neighbor Cache upon receipt of a Router
  Advertisement.

=head1 References

  * [ND]  Sections 6.3.4 and 7.3.3

=head1 Resource Requirements

  * Packet generator
  * Monitor to capture packets

=head1 Test Setup

  No Common Test Setup is performed. Wait at least 3 seconds
  (MAX_MULTICAST_SOLICIT * RETRANS_TIMER) after any previous cleanup to make sure all
  previous NCE's are in state No NCE. The Common Test Cleanup procedure is performed after each
  part.

=begin html

<BLOCKQUOTE>

<TABLE BORDER>
<Caption>Router Solicitation A</Caption>
<TR>
<TD>
	IPv6 Header<br>
	Next Header: 58<br>
	Source Address: TR1's Link-local Address<br>
</TD>
</TR>
<TR>
<TD>
	Router Advertisement<br>
	Router Lifetime: 0 seconds<br>
	Reachable Time: 10 seconds<br>
	Retransmit Interval: 1 second<br>
	Source Link-layer Option

</TD>
</TR>
</TABLE>

<br>

<TABLE BORDER>
<Caption>Echo Request B</Caption>
<TR>
<TD>
        IPv6 Header<br>
        Next Header: 58<br>
        Source Address: TR1's link-local Address<br>
        Destination Address: HUT's link-local Address
</TD>
</TR>
<TR>
<TD>
	ICMPv6 Echo Request
</TD>
</TR>
</TABLE>

<br>

<TABLE BORDER>
<Caption>Neighbor Advertisement C</Caption>
<TR>
<TD>
        IPv6 Header<br>
        Next Header: 58<br>
        Source Address: TR1's Link-local Address<br>
	Destination Address: HUT's Link-local Address
</TD>
</TR>
<TR>
<TD>
        Neighbor Advertisement<br>
	Router flag: 1<br>
        Solicited flag: 1<br>
        Override flag: 1<br>
	Target Address: TR1's Link-local Address
</TD>
</TR>

</TABLE>
</BLOCKQUOTE>

=end html


=head1 Procedure

  Part G: RA with SLLA unchanged, NCE PROBE
   31. Repeat Steps 19 through 30, transmitting Router Advertisement A in Step 28 with the same
       Source Link-layer Address.
   32. Check the NCE of TR1 on the HUT and observe the packets transmitted by the HUT.

=head1 Observable Results

  Part G
   Step 20:
   The HUT should create a Neighbor Cache Entry for TR1 and set the state of the
   Entry to INCOMPLETE. The HUT should send a multicast Neighbor Solicitation to TR1.

   Step 22:
   The HUT should update the state of TR1's NCE to REACHABLE and record
   TR1's Link-layer Address. Because the HUT is in state REACHABLE, after receiving the
   earlier Echo Request from TR1, the HUT should send an Echo Reply using the received
   Link-Layer Address. After DELAY_FIRST_PROBE_TIME, the HUT should not send a
   unicast Neighbor Solicitation to TR1.

   Step 25:
   The HUT should update the state of TR1's NCE to STALE, send an Echo Reply to
   TR1 using the same Link-Layer address and enter state DELAY.

   Step 27:
   The HUT should update the state of TR1's NCE to PROBE by sending a unicast
   Neighbor Solicitation to TR1.

   Step 30:
   The HUT must not change the state of the TR1's NCE. The HUT must continue to
   be in state PROBE and send unicast Neighbor Solicitations to TR1 up to
   MAX_UNICAST_SOLICIT times.

=head1 Possible Problems

  * None. 

=cut