#!/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_4_F.seq,v 1.3 2005/04/11 08:54:41 akisada Exp $
#
########################################################################

use rdisc;

BEGIN {}
END   {}

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

vCapture($Link0);

$pktdesc{'rs_local'} =
	'    Send RS w/ SLL: '.
	'unspecified address -> all-routers multicast address';

unless(v6LC_2_2_4($Link0)) {
        exitFail($Link0);
        #NOTREACHED
}

exitPass($Link0);
#NOTREACHED



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

=head1 NAME

=begin html
<BLOCKQUOTE><TT>
V6LC_2_2_4_F - Router Ignores Invalid Router Solicitations (Unspecified IP source address and a source link-layer address option)

=end html

=begin html
</TT></BLOCKQUOTE>

=end html

=head1 TARGET

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

=end html

=head1 TOPOLOGY

=begin html
<BLOCKQUOTE>
<BLOCKQUOTE>
<PRE>
            |
   TN1     RUT
    |       |
----+-------+--- Link0
</PRE>
</BLOCKQUOTE>
<P>
<TABLE BORDER>
<TR>
<TD ROWSPAN="2"><TT>Link0</TT></TD>
<TD><TT>global</TT></TD>
<TD><TT>3ffe:501:ffff:100::/64</TT></TD>
</TR>
<TR>
<TD><TT>link-local</TT></TD>
<TD><TT>fe80::/64</TT></TD>
</TR>
<TR>
<TD ROWSPAN="3"><TT>RUT</TT></TD>
<TD><TT>global</TT></TD>
<TD><TT>3ffe:501:ffff:100::&lt;NutDef.Link0_addr&gt;</TT></TD>
</TR>
<TR>
<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="3"><TT>TN1</TT></TD>
<TD><TT>global</TT></TD>
<TD><TT>3ffe:501:ffff:100::&lt;TnDef.Link0_addr&gt;</TT></TD>
</TR>
<TR>
<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 router ignores invalid Router Solicitations.</B></TT><BR>
<BLOCKQUOTE>
<PRE>
   TN1     RUT
    |       |
    |       * Configure Interface A on the RUT to be an advertising interface.
    |       |
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    | -->   | RS (multicast)
    |   X-- | no response <A NAME="PRC1">[<A HREF="#JDG1">Judgment #1</A>]
    |       |
    V       V
</PRE>
</BLOCKQUOTE>
<P>
<PRE>
1. Configure Interface A on the RUT to be an advertising interface.
</PRE>
<PRE>
2. Observe RA
</PRE>
<PRE>
        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::
</PRE>
<PRE>
        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::
</PRE>
<PRE>
3. Send RS
</PRE>
<PRE>
        IPv6 header
            source      = unspecified address
            destination = all-routers multicast address
        RS
        SLL option
</PRE>
<PRE>
4. no response
</PRE>
</BLOCKQUOTE>

=end html

=head1 JUDGEMENT

=begin html
<BLOCKQUOTE>
<TT><A NAME="JDG1">[<A HREF="#PRC1">Judgment #1</A>] The RUT must discard the Router Solicitation from TN1 and must not transmit a corresponding Router Advertisement within MAX_RA_DELAY_TIME (0.5) seconds.</TT><BR>
</BLOCKQUOTE>

=end html

=head1 CLEANUP

=begin html
<BLOCKQUOTE>
<TT><B>The Cleanup procedure should cause the NUT to transition Neighbor Cache entries created in this test to state INCOMPLETE and remove any entries from its Default Router and Prefix Lists.</B></TT>
<BLOCKQUOTE>
<PRE>
   TN1     RUT
    |       |
    |       * Ceasing to be an advertising interface
    |       |
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    V       V
</PRE>
</BLOCKQUOTE>
<P>
<PRE>
1. Ceasing to be an advertising interface
</PRE>
<PRE>
2. Observe RA
</PRE>
<PRE>
        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::
</PRE>
<PRE>
        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::
</PRE>
</BLOCKQUOTE>

=end html

=cut

# =head1 REFERENCE
# 
# =begin html
# <BLOCKQUOTE>
# <PRE>
# 6.1.1.  Validation of Router Solicitation Messages
# </PRE>
# <PRE>
#    Hosts <FONT COLOR="#FF0000">MUST</FONT> silently discard any received Router Solicitation
#    Messages.
# </PRE>
# <PRE>
#    A router <FONT COLOR="#FF0000">MUST</FONT> silently discard any received Router Solicitation
#    messages that do not satisfy all of the following validity checks:
# </PRE>
# <PRE>
#       - The IP Hop Limit field has a value of 255, i.e., the packet
#         could not possibly have been forwarded by a router.
# </PRE>
# <PRE>
#       - If the message includes an IP Authentication Header, the message
#         authenticates correctly.
# </PRE>
# <PRE>
#       - ICMP Checksum is valid.
# </PRE>
# <PRE>
#       - ICMP Code is 0.
# </PRE>
# <PRE>
#       - ICMP length (derived from the IP length) is 8 or more octets.
# </PRE>
# <PRE>
#       - All included options have a length that is greater than zero.
# </PRE>
# <PRE>
#       - <U><B>If the IP source address is the unspecified address, there is no</B></U>
#         <U><B>source link-layer address option in the message.</B></U>
# </PRE>
# <PRE>
#    The contents of the Reserved field, and of any unrecognized options,
#    <FONT COLOR="#FF0000">MUST</FONT> be ignored.  Future, backward-compatible changes to the protocol
#    may specify the contents of the Reserved field or add new options;
#    backward-incompatible changes may use different Code values.
# </PRE>
# <PRE>
#    The contents of any defined options that are not specified to be used
#    with Router Solicitation messages <FONT COLOR="#FF0000">MUST</FONT> be ignored and the packet
#    processed as normal.  The only defined option that may appear is the
#    Source Link-Layer Address option.
# </PRE>
# <PRE>
#    A solicitation that passes the validity checks is called a "valid
#    solicitation".
# </PRE>
# </BLOCKQUOTE>
# 
# =end html
# 

=pod

=head1 REFERENCE

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

=end html

=cut