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#!/usr/bin/perl
#
# Module: vyatta-dhcpv6-client.pl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2005-2009 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Bob Gilligan <gilligan@vyatta.com>
# Date: April 2010
# Description: Start and stop DHCPv6 client daemon for an interface.
#
# **** End License ****
#
#
use strict;
use lib "/opt/vyatta/share/perl5/";
use FileHandle;
use Vyatta::Config;
use Getopt::Long;
my $start_flag; # Start the daemon
my $stop_flag; # Stop the daemon and delete all config files
my $release_flag; # Stop the daemon, but leave config file
my $renew_flag; # Re-start the daemon. Functionally same as start_flag
my $temp_flag;
my $params_only_flag;
my $ifname;
sub gen_conf_file {
my ($conffile, $ifname) = @_;
my $FD_WR = new FileHandle;
if (!open($FD_WR, ">$conffile")) {
printf("Can't write config file: $conffile\n");
exit 1;
}
my $date = `date`;
my $user = `id -un`;
my $hostname = `hostname`;
chomp($date);
chomp($user);
chomp($hostname);
print $FD_WR "# This file was auto-generated by the Vyatta\n";
print $FD_WR "# configuration sub-system. Do not edit it.\n";
print $FD_WR "\n";
print $FD_WR "# Generated on $date by $user\n";
print $FD_WR "#\n";
print $FD_WR "interface \"$ifname\" {\n";
# print $FD_WR " send host-name \"$hostname\";\n";
# print $FD_WR " send dhcp6.oro 1, 2, 7, 12, 13, 23, 24, 39;\n";
print $FD_WR "}\n";
}
#
# Main Section
#
GetOptions("start" => \$start_flag,
"stop" => \$stop_flag,
"release" => \$release_flag,
"renew" => \$renew_flag,
"temporary" => \$temp_flag,
"parameters-only" => \$params_only_flag,
"ifname=s" => \$ifname,
);
if ((defined $temp_flag) && (defined $params_only_flag)) {
printf("Error: --temporary and --parameters-only flags are mutually exclusive.\n");
exit 1;
}
if (!defined $ifname) {
printf("Error: Interface name must be specified with --ifname parameter.\n");
exit 1;
}
my $pidfile = "/var/lib/dhcp3/dhclient_v6_$ifname.pid";
my $leasefile = "/var/lib/dhcp3/dhclient_v6_$ifname.leases";
my $conffile = "/var/lib/dhcp3/dhclient_v6_$ifname.conf";
my $cmdname = "/sbin/dhclient";
if (defined $release_flag) {
if (! -e $conffile) {
printf("DHCPv6 client is not configured on interface $ifname.\n");
exit 1;
}
if (! -e $pidfile) {
printf("DHCPv6 client is already released on interface $ifname.\n");
exit 1;
}
}
if (defined $renew_flag) {
if (! -e $conffile) {
printf("DHCPv6 client is not configured on interface $ifname.\n");
exit 1;
}
}
if (defined $stop_flag || defined $release_flag) {
# Stop dhclient -6 on $ifname
printf("Stopping daemon...\n");
my $output=`$cmdname -6 -nw -cf $conffile -pf $pidfile -lf $leasefile -r $ifname`;
printf($output);
# Delete files it leaves behind...
printf("Deleting related files...\n");
unlink($pidfile);
if (defined $stop_flag) {
# If just releasing, leave the config file around as a flag that
# DHCPv6 remains configured on this interface.
unlink($conffile);
}
}
if (defined $start_flag || defined $renew_flag) {
# Generate the DHCP client config file...
gen_conf_file($conffile, $ifname);
# First, kill any previous instance of dhclient running on this interface
#
printf("Stopping old daemon...\n");
my $output = `$cmdname -6 -pf $pidfile -x $ifname`;
printf($output);
# start "dhclient -6" on $ifname
my $args = "";
if (defined $temp_flag) {
$args .= " -T";
}
if (defined $params_only_flag) {
$args .= " -S";
}
printf("Starting new daemon...\n");
my $output=`$cmdname -6 -nw -cf $conffile -pf $pidfile -lf $leasefile $args $ifname`;
printf($output);
}
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