#!/usr/bin/perl
#
#$Copyright$
#
#$Id: C_RFC3315_18_1_2_RetransCnf.seq,v 1.3 2007/09/20 02:00:29 hide Exp $
###############################################################################
BEGIN{
	$V6evalTool::TestVersion = '$Name:  $';
}
use strict;
use V6evalTool;

use lib '../.';
use DHCPv6_common;
use Client_pktdesc;

dhcpExitNS if(ChkFuncSupport('ADDRASSIGN') && ChkFuncSupport('DNS'));

#--------------------------------------------------------------#
# Initialization variables
#--------------------------------------------------------------#
my $IF0_NUT = $V6evalTool::NutDef{"Link0_device"};
my $IF0 = "Link0";
my ($start,$rd,$MRD) = (0,0,$CNF_MAX_RD);
my $timeout = 2*$CNF_MAX_RT;

vCapture($IF0);
#--------------------------------------------------------------#
# Initialize DHCPv6 Client
#--------------------------------------------------------------#
my $ret = initial_ra_w_ping($IF0,'ra_server2_to_all');
if($ret == 0){
	vLogHTML('<FONT COLOR="#FF0000">Global Address of NUT is assigned by RA!</FONT><BR>');
	dhcpExitFail;
}

$ret = vRemote("dhcp6c.rmt", "start", "iana", "iaid=111111", "link0=$IF0_NUT");
if($ret != 0) {
	vLogHTML('<FONT COLOR="#FF0000">Cannot Initialize DHCPv6 Client program.</FONT><BR>');
	dhcpExitFail;
};
#--------------------------------------------------------------#
#1.  Wait until Solicit arrives 
#--------------------------------------------------------------#
my ($retsol,%sol) = wait_for_solicit($IF0,30);
if($retsol != 0){
	dhcpExitFail;
}
#vClear($IF0);
#--------------------------------------------------------------#
#2. Send Advertise to reply to Solicit
#--------------------------------------------------------------#
$SID_OPTION = "opt_SID_LLT_server1";
$IA_NA_OPTION = "opt_IA_NA_Addr_woStatus";
my ($retadv, %adv) = send_advertise($IF0, "advertise_server1_to_nut", \%sol, "");
if($retadv != 0){
	dhcpExitFail;
}
#--------------------------------------------------------------#
#3.  Wait until Request arrives 
#--------------------------------------------------------------#
my ($retreq, %req) = wait_for_request($IF0,30);
if($retreq != 0){
	dhcpExitFail;
}
vClear($IF0);
#--------------------------------------------------------------#
#4. send Reply message
#--------------------------------------------------------------#
$StatusCode_OPTION = "opt_StatusCode";
my ($retrep, %rep) = send_reply($IF0, "reply_server1_to_nut", \%req, "");
if($retrep !=0){
	dhcpExitFail;
}
# wait for DAD completion
vRecv($IF0, 3, 0, 0, 'dadns_nutga');
vSleep(3);
my $ret = ping_test($IF0);
if($ret != 0){
	dhcpExitFail;
}
vClear($IF0);
#--------------------------------------------------------------#
# Restart DHCP Client
#--------------------------------------------------------------#
#dhcpCltRestart();
#$ret = undef;
#$ret = vRemoteAsync("dhcp6c.rmt", "restart", "link0=$IF0_NUT");
#if($ret != 0) {
#	vLogHTML('<FONT COLOR="#FF0000">Cannot Restart DHCPv6 Client.</FONT><BR>');
#	vRemoteAsyncWait();
#	dhcpExitFail;
#};

# interface up/down
ifDown($IF0_NUT);
vSleep(5);
ifUp($IF0_NUT);
#--------------------------------------------------------------#
#5. Wait until confirm arrives 
#--------------------------------------------------------------#
my ($retcnf1,%cnf1) = wait_for_confirm($IF0, $timeout);
if($retcnf1 != 0){
#	vRemoteAsyncWait();
	dhcpExitFail;
}
$ret = options_exist(\%cnf1,$CMP_ETIME);
if($ret != 0){
	dhcpExitFail;
}
$start = getElapsedtime(\%cnf1);
my $ago = $start;
#First retransmitted RT
my ($retcnf2,%cnf2) = wait_for_confirm($IF0, $timeout);
if($retcnf2 != 0){
#	vRemoteAsyncWait();
	dhcpExitFail;
}			   
my $now = getElapsedtime(\%cnf2);
$rd = $now - $start;
my $RT = $now - $ago;
vLogHTML("<FONT COLOR=\"#FF0000\">RT = $RT</FONT><BR>");
vLogHTML("<FONT COLOR=\"#FF0000\">RD = $rd</FONT><BR>");
my $RTnextMAX = $RT*2 + $RAND*$RT;
my $RTnextMIN = $RT*2 - $RAND*$RT;
$ago = $now;
#--------------------------------------------------------------#
#6. Wait until retransmitted message arrives 
#--------------------------------------------------------------#
while($rd + $RTnextMIN <= $MRD){
	($retcnf2,%cnf2) = wait_for_confirm($IF0,$RTnextMAX);
	if($retcnf2 != 0){
#		vRemoteAsyncWait();
		dhcpExitFail;
	}
	$now = getElapsedtime(\%cnf2);
	$rd = $now - $start;
	$RT = $now - $ago;
	vLogHTML("<FONT COLOR=\"#FF0000\">RT = $RT</FONT><BR>");
	vLogHTML("<FONT COLOR=\"#FF0000\">RD = $rd</FONT><BR>");
	$RTnextMAX = $RT*2 + $RAND*$RT;
	$RTnextMIN = $RT*2 - $RAND*$RT;
	$ago = $now;
}
my ($retcnf2,%cnf2) = wait_for_confirm($IF0, $timeout);
if($retcnf2 == 0){
	vLogHTML("<FONT COLOR=\"#FF0000\"> RD more than CNF_MAX_RD($MRD) !</FONT><BR>");
#	vRemoteAsyncWait();
	dhcpExitFail;
}

#vRemoteAsyncWait();
dhcpExitPass;

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

=head1 NAME 

  C_RFC3315_18_1_2_RetransCnf.seq - Check MRD for retransmission of Confirm

=head1 TARGET

  Client

=head1 SYNOPSIS

=begin html
<PRE>
  <A HREF="./C_RFC3315_18_1_2_RetransCnf.seq"> C_RFC3315_18_1_2_RetransCnf.seq</A> [-tooloption...] <BR>  -pkt  <A HREF="./C_RFC3315_18_1_2_RetransCnf.def"> C_RFC3315_18_1_2_RetransCnf.def</A> <BR>  -tooloption : v6eval tool option
<BR>
  See Also <A HREF="./DHCPv6.def"> DHCPv6.def </A> 
</PRE>

=end html

=head1 INITIALIZATION

=begin html
  <ul>
  <li><STRONG>Network Topology</STRONG></li> 
   <PRE>
          NUT(Client)
          |           
          |                        
Link0   --+--------+------------------------ 3ffe:501:ffff:100::/64
                   |
                   |          
                   TN(Server) 
   </PRE>
  </ul>
  <ul>  
  <li><STRONG>Verification Points</STRONG></li><br>
   <PRE>
   The client transmits the message using the following parameters:<BR>
     IRT   CNF_TIMEOUT  <BR>
     MRT   CNF_MAX_RT   <BR>
     MRC   0            <BR>
     MRD   CNF_MAX_RD   <BR>
   When the duration of retransmission is more than CNF_MAX_RD, the 
   client stops retransmission.  
   </PRE>
  </ul>
  <ul> 
  <li><STRONG>Configurations</STRONG></li><br>
   <BR>
    <TABLE BORDER="1">
    <TR>
    <TD><TT>Device Name</TT></TD>
    <TD><TT>Device Type</TT></TD>
    <TD><TT>Interface</TT></TD>
    <TD><TT>Assigned Prefix</TT></TD>
    <TD><TT>Link Local Addr</TT></TD>
    <TD><TT>MAC Addr</TT></TD>
    </TR>
    <TR>
    <TD><TT>Client</TT></TD>
    <TD><TT>NUT</TT></TD>
    <TD><TT>Link0</TT></TD>
    <TD><TT>3ffe:501:ffff:100::/64</TT></TD>
    <TD><TT>NUT's Linklocal address</TT></TD>
    <TD><TT>NUT's MAC address</TT></TD>
    </TR>
    <TR>
    <TD><TT>Server</TT></TD>
    <TD><TT>TN</TT></TD>
    <TD><TT>Link0</TT></TD>
    <TD><TT>3ffe:501:ffff:100::/64</TT></TD>
    <TD><TT>fe80::200:ff:fe00:a1a1</TT></TD>
    <TD><TT>00:00:00:00:a1:a1</TT></TD>
    </TR>
    </TABLE>
  </ul>

=end html

=head1 TEST PROCEDURE

=begin html
<PRE>
<BR>
       NUT      TN
        |       |
        |       |Initialize NUT(as a DHCPv6 client)
        |       |
        | ----> |<B>Solicit</B>
        | <---- |<B>Advertise</B>
        | ----> |<B>Request</B>
        | <---- |<B>Reply</B>
        | <---- |<B>Echo Request</B>
        | ----> |<B>Echo Reply</B>
        |       |
        |       |Reboot NUT 
        |       |
        | ----> |<B>Confirm</B>
        |       |
        |       |Repeat unitl evaluating retransmission time is more than MRD 
        |       |
        | ----> |<B>Confirm</B>(8*)
        |       |
        |       |
</PRE>

=end html

=head1 JUDGEMENT

=begin html
<PRE>
<BR>  
  (8*)PASS: NUT does NOT retransmit Confirm message. 
</PRE>

=end html

=head1 TERMINATION

=begin html
<PRE>
  N/A
</PRE>

=end html

=head1 REFERENCE

=begin html
<PRE>
  Also see RFC3315
<BR>
  18.1.2. Creation and Transmission of Confirm Messages
<BR>
</PRE>

=end html

=head1 SEE ALSO

=begin html
<PRE>
<BR>
  perldoc  V6evalTool
<BR>
</PRE>

=end html