#!/usr/local/bin/php
<?php
require_once("config.inc");
require_once("interfaces.inc");
require_once("util.inc");
$subsystem = !empty($argv[1]) ? $argv[1] : '';
$type = !empty($argv[2]) ? $argv[2] : '';
if ($type != 'MASTER' && $type != 'BACKUP') {
    log_error("Carp '$type' event unknown from source '{$subsystem}'");
    exit(1);
}
if (!strstr($subsystem, '@')) {
    log_error("Carp '$type' event triggered from wrong source '{$subsystem}'");
    exit(1);
}
foreach($config['interfaces'] as $ifkey => $interface) {
    if ($ifkey=='opt4') {
        if ($type == 'MASTER') {
            log_msg("Carp Status is now Master!");
            log_msg("Enabling interface: $ifkey - {$interface['if']}");
            shell_exec("/sbin/ifconfig {$interface['if']} up");
            $config['interfaces'][$ifkey]['enable'] = '1';
            write_config("enable interface '$ifkey' due CARP event '$type'", false);
            interface_configure(false, $ifkey, false, false);
            sleep(1);
            log_msg("Restarting DHCPD");
            shell_exec('pluginctl -s dhcpd restart');
            sleep(1);
            log_msg("Issueing dhclient command to request a DHCP lease");
            shell_exec("dhclient {$interface['if']}");
        } else if ($type == 'BACKUP') {
            log_msg("Carp Status is now Backup!");
            log_msg("Disabling interface: $ifkey - {$interface['if']}");
            shell_exec("/sbin/ifconfig {$interface['if']} down");
            unset($config['interfaces'][$ifkey]['enable']);
            write_config("disable interface '$ifkey' due CARP event '$type'", false);
            interface_configure(false, $ifkey, false, false);
            log_msg("Stopping DHCPD");
            shell_exec('pluginctl -s dhcpd stop');
        }
    }
}