#!/usr/bin/perl
#
# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
# 	Yokogawa Electric Corporation.
# All rights reserved.
# 
# Redistribution and use of this software in source and binary
# forms, with or without modification, are permitted provided that
# the following conditions and disclaimer are agreed and accepted
# by the user:
# 
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in
#    the documentation and/or other materials provided with
#    the distribution.
# 
# 3. Neither the names of the copyrighters, the name of the project
#    which is related to this software (hereinafter referred to as
#    "project") nor the names of the contributors may be used to
#    endorse or promote products derived from this software without
#    specific prior written permission.
# 
# 4. No merchantable use may be permitted without prior written
#    notification to the copyrighters.
# 
# 5. The copyrighters, the project and the contributors may prohibit
#    the use of this software at any time.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHTERS, THE PROJECT AND
# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING
# BUT NOT LIMITED THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.  IN NO EVENT SHALL THE
# COPYRIGHTERS, THE PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# $TAHI: ct/nd.p2/V6LC_2_2_3_C.seq,v 1.4 2005/04/14 08:40:23 akisada Exp $
#
########################################################################

use rdisc;

BEGIN {}
END   {}

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

vCapture($Link0);

$pktdesc{'local_rs'}
	= '    Send RS w/ SLL: '.
		'TN1 (link-local) -> NUT (link-local)';

unless(v6LC_2_2_3($Link0)) {
        exitFail($Link0);
        #NOTREACHED
}

exitPass($Link0);
#NOTREACHED



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

=head1 NAME

=begin html
<BLOCKQUOTE><TT>
V6LC_2_2_3_C - Host Ignores Router Solicitations (Link-local Unicast Destination)

=end html

=begin html
</TT></BLOCKQUOTE>

=end html

=head1 TARGET

=begin html
<BLOCKQUOTE>
<TT>Host</TT>
</BLOCKQUOTE>

=end html

=head1 TOPOLOGY

=begin html
<BLOCKQUOTE>
<BLOCKQUOTE>
<PRE>
   TN1     HUT
    |       |
----+-------+--- Link0
</PRE>
</BLOCKQUOTE>
<P>
<TABLE BORDER>
<TR>
<TD><TT>Link0</TT></TD>
<TD><TT>link-local</TT></TD>
<TD><TT>fe80::/64</TT></TD>
</TR>
<TR>
<TD ROWSPAN="2"><TT>HUT</TT></TD>
<TD><TT>link-local</TT></TD>
<TD><TT>fe80::&lt;NutDef.Link0_addr&gt;</TT></TD>
</TR>
<TR>
<TD><TT>ether</TT></TD>
<TD><TT>&lt;NutDef.Link0_addr&gt;</TT></TD>
</TR>
<TR>
<TD ROWSPAN="2"><TT>TN1</TT></TD>
<TD><TT>link-local</TT></TD>
<TD><TT>fe80::&lt;TnDef.Link0_addr&gt;</TT></TD>
</TR>
<TR>
<TD><TT>ether</TT></TD>
<TD><TT>&lt;TnDef.Link0_addr&gt;</TT></TD>
</TR>
</TABLE>
</BLOCKQUOTE>

=end html

=head1 SETUP

=begin html
<BLOCKQUOTE>
<PRE>
none
</PRE>
</BLOCKQUOTE>

=end html

=head1 TEST PROCEDURE

=begin html
<BLOCKQUOTE>
<TT><B>- Verify that a host ignores Router Solicitations and does not update its Neighbor Cache.</B></TT><BR>
<BLOCKQUOTE>
<PRE>
   TN1     HUT
    |       |
    | ----> | RS
    |       |
    |       * Wait (RETRANS_TIMER * MAX_*CAST_SOLICIT)
    |       |
    | ----> | Echo Request
    |   <-- | NS (multicast) <A NAME="PRC1">[<A HREF="#JDG1">Judgment #1</A>]
    |   <-- | NS
    |   <-- | NS
    |       |
    V       V
</PRE>
</BLOCKQUOTE>
<P>
<PRE>
1. Send RS
</PRE>
<PRE>
        IPv6 header
            hop limit   = 255
            source      = TN1 (link-local)
            destination = NUT (link-local)
        RS
        SLL option
</PRE>
<PRE>
2. Wait (RETRANS_TIMER * MAX_*CAST_SOLICIT)
</PRE>
<PRE>
        Node constants:
            MAX_MULTICAST_SOLICIT: 3 transmissions
            MAX_UNICAST_SOLICIT:   3 transmissions
            RETRANS_TIMER:         1,000 milliseconds
</PRE>
<PRE>
3. Send Echo Request
</PRE>
<PRE>
        IPv6 header
            source      = TN1 (link-local)
            destination = HUT (link-local)
        Echo Request
</PRE>
<PRE>
4. Observe MAX_MULTICAST_SOLICIT NSs
</PRE>
<PRE>
        IPv6 header
            hop limit   = 255
            source      = HUT (link-local)
            destination = TN1 (solicited-node multicast address)
        NS
            target      = TN1 (link-local)
        SLL option
</PRE>
<PRE>
        Node constants:
            MAX_MULTICAST_SOLICIT: 3 transmissions
</PRE>
</BLOCKQUOTE>

=end html

=head1 JUDGEMENT

=begin html
<BLOCKQUOTE>
<TT><A NAME="JDG1">[<A HREF="#PRC1">Judgment #1</A>] the HUT should send a multicast Neighbor Solicitation for TN1 in Step 5, indicating the HUT did not process the Router Solicitation from TN1.</TT><BR>
</BLOCKQUOTE>

=end html

=head1 CLEANUP

=begin html
<BLOCKQUOTE>
<PRE>
none
</PRE>
</BLOCKQUOTE>

=end html

=cut

# =head1 REFERENCE
# 
# =begin html
# <BLOCKQUOTE>
# <PRE>
# 6.2.6.  Processing Router Solicitations
# </PRE>
# <PRE>
#    <U><B>A host <FONT COLOR="#FF0000">MUST</FONT> silently discard any received Router Solicitation</B></U>
#    <U><B>messages.</B></U>
# </PRE>
# <PRE>
#    In addition to sending periodic, unsolicited advertisements, a router
#    sends advertisements in response to valid solicitations received on
#    an advertising interface.  A router <FONT COLOR="#FF0000">MAY</FONT> choose to unicast the
#    response directly to the soliciting host's address (if the
#    solicitation's source address is not the unspecified address), but
#    the usual case is to multicast the response to the all-nodes group.
#    In the latter case, the interface's interval timer is reset to a new
#    random value, as if an unsolicited advertisement had just been sent
#    (see Section 6.2.4).
# </PRE>
# <PRE>
#    In all cases, Router Advertisements sent in response to a Router
#    Solicitation <FONT COLOR="#FF0000">MUST</FONT> be delayed by a random time between 0 and
#    MAX_RA_DELAY_TIME seconds. (If a single advertisement is sent in
#    response to multiple solicitations, the delay is relative to the
#    first solicitation.)  In addition, consecutive Router Advertisements
#    sent to the all-nodes multicast address <FONT COLOR="#FF0000">MUST</FONT> be rate limited to no
#    more than one advertisement every MIN_DELAY_BETWEEN_RAS seconds.
# </PRE>
# <PRE>
#    A router might process Router Solicitations as follows:
# </PRE>
# <PRE>
#     - Upon receipt of a Router Solicitation, compute a random delay
#       within the range 0 through MAX_RA_DELAY_TIME.  If the computed
#       value corresponds to a time later than the time the next multicast
#       Router Advertisement is scheduled to be sent, ignore the random
#       delay and send the advertisement at the already-scheduled time.
# </PRE>
# <PRE>
#     - If the router sent a multicast Router Advertisement (solicited or
#       unsolicited) within the last MIN_DELAY_BETWEEN_RAS seconds,
#       schedule the advertisement to be sent at a time corresponding to
#       MIN_DELAY_BETWEEN_RAS plus the random value after the previous
#       advertisement was sent.  This ensures that the multicast Router
#       Advertisements are rate limited.
# </PRE>
# <PRE>
#     - Otherwise, schedule the sending of a Router Advertisement at the
#       time given by the random value.
# </PRE>
# <PRE>
#    Note that a router is permitted to send multicast Router
#    Advertisements more frequently than indicated by the
#    MinRtrAdvInterval configuration variable so long as the more frequent
#    advertisements are responses to Router Solicitations.  In all cases,
#    however, unsolicited multicast advertisements <FONT COLOR="#FF0000">MUST NOT</FONT> be sent more
#    frequently than indicated by MinRtrAdvInterval.
# </PRE>
# <PRE>
#    Router Solicitations in which the Source Address is the unspecified
#    address <FONT COLOR="#FF0000">MUST NOT</FONT> update the router's Neighbor Cache; solicitations
#    with a proper source address update the Neighbor Cache as follows. If
#    the router already has a Neighbor Cache entry for the solicitation's
#    sender, the solicitation contains a Source Link-Layer Address option,
#    and the received link-layer address differs from that already in the
#    cache, the link-layer address <FONT COLOR="#FF0000">SHOULD</FONT> be updated in the appropriate
#    Neighbor Cache entry, and its reachability state <FONT COLOR="#FF0000">MUST</FONT> also be set to
#    STALE.  If there is no existing Neighbor Cache entry for the
#    solicitation's sender, the router creates one, installs the link-
#    layer address and sets its reachability state to STALE as specified
#    in Section 7.3.3.  Whether or not a Source Link-Layer Address option
#    is provided, if a Neighbor Cache entry for the solicitation's sender
#    exists (or is created) the entry's IsRouter flag <FONT COLOR="#FF0000">MUST</FONT> be set to
#    FALSE.
# </PRE>
# </BLOCKQUOTE>
# 
# =end html
# 

=pod

=head1 REFERENCE

=begin html
<BLOCKQUOTE>
<PRE>
RFC 2461 - Neighbor Discovery for IPv6
</PRE>
</BLOCKQUOTE>

=end html

=cut