#!/usr/bin/env php
<?php
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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.
 */

/* Based on freeradius Perl script from observium_agent by Nikos Hasiotis
 * 16/Feb/2014 by David Croft:
 *  - Converted to PHP.
 *  - Exit quietly if radclient can't be found.
 *  - Allow override of timeout and retries.
 *  - Allow configuration from an external configuration file.
 */

/* Note that you will need to enable the FreeRADIUS status server and the status site, see
 * http://wiki.freeradius.org/config/Status
 *
 * Configuration valus should be overridden in a file called freeradius.conf,
 * which can be located either in this script's directory, or in /etc/observium_agent
 */

$radclient      = "/usr/bin/radclient";
$radius_secret  = "adminsecret";
$radius_port    = "18120";
$radius_timeout = 2; // Timeout for each attempt in seconds
$radius_retries = 3; // Number of times to try

if (file_exists(dirname(__FILE__) . '/freeradius.conf')) {
  include dirname(__FILE__) . '/freeradius.conf';
}

if (file_exists('/etc/observium_agent/freeradius.conf')) {
  include '/etc/observium_agent/freeradius.conf';
}

if (!is_executable($radclient)) {
  exit();
}

$radcmd  = "$radclient -t $radius_timeout -r $radius_retries localhost:$radius_port status $radius_secret";

$out = array();

foreach (array(1, 2) as $statstype) {
  $radmsg = "Message-Authenticator = 0x00, FreeRADIUS-Statistics-Type = $statstype";
  exec("echo '$radmsg' | $radcmd", &$out, $retval);
  if ($retval != 0) exit($retval);
}

$radval = array();

foreach ($out as $line) {
  if (preg_match('/^\s*(.*) = (.*)$/', $line, $bits)) {
    list (, $key, $value) = $bits;
    if (preg_match('/^FreeRADIUS/', $key)) {
      $radval[$key] = $value;
    }
  }
}

echo "<<<freeradius>>>\n";
foreach ($radval as $key => $val) {
  echo $key . ':' . $val . "\n";
}