pfSense

<?php

    $Id$

    Copyright (c) 2006, Jonathan De Graeve <jonathan.de.graeve@imelda.be>

    All rights reserved.

    modification, are permitted provided that the following conditions 

       notice, this list of conditions and the following disclaimer in the 

    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 

    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 

    IN NO EVENT SHALL THE COPYRIGHT OWNER 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, 

        This code is made possible thx to samples made by Michael Bretterklieber <michael@bretterklieber.com>

        author of the PHP PECL Radius package

*/

function RADIUS_ACCOUNTING_START($ruleno,$username,$sessionid,$radiusip,$radiusport,$radiuskey,$clientip,$clientmac) {

    $retvalue = array();

    $nas_mac = mac_format(get_interface_mac($config['interfaces']['wan']['if']));

    $clientmac = mac_format($clientmac);

    $nas_port = $ruleno - 10000;

    $radiusvendor = $config['captiveportal']['radiusvendor'] ? $config['captiveportal']['radiusvendor'] : null;

    switch($radiusvendor) {

        case 'cisco':

        $calledstationid = $clientmac;

        $callingstationid = $clientip;

        break;

        default:

        $calledstationid = $nas_mac;

        $callingstationid = $clientmac;

    }

    // Create our instance

    $racct = new Auth_RADIUS_Acct_Start;

    /* Different Authentication options

     *

     * Its possible todo other authentication methods but still do radius accounting

     *

     * RADIUS_AUTH_RADIUS => authenticated via Radius

     * RADIUS_AUTH_LOCAL  => authenticated local

     * RADIUS_AUTH_REMOTE => authenticated remote

     *

     */

    $racct->authentic = RADIUS_AUTH_RADIUS;

    // Construct data package

    $racct->username = $username;

    $racct->addServer($radiusip, $radiusport, $radiuskey);

    if (PEAR::isError($racct->start())) {

        $retvalue['acct_val'] = 1;

        $retvalue['error'] = $racct->getMessage();

        $racct->close();

        return $retvalue;

        /* Old code:

         * $status = $racct->start();

         * if(PEAR::isError($status)) {

         *    if ($debug)

         *        printf("Radius start: %s<br>\n", $status->getMessage());

         *        exit;

         * }

         */

    }

    /*

     * NAS_PORT_TYPE, int => RADIUS_ETHERNET (15), RADIUS_WIRELESS_OTHER (18), RADIUS_WIRELESS_IEEE_802_11 (19)

     */

    // Default attributes

    $racct->putAttribute(RADIUS_SERVICE_TYPE, RADIUS_LOGIN);

    $racct->putAttribute(RADIUS_NAS_PORT_TYPE, RADIUS_ETHERNET);

    $racct->putAttribute(RADIUS_NAS_PORT, $nas_port);

    $racct->putAttribute(RADIUS_ACCT_SESSION_ID, $sessionid);

    // Extra data to identify the client and nas

    $racct->putAttribute(RADIUS_FRAMED_IP_ADDRESS, $clientip, "addr");

    $racct->putAttribute(RADIUS_CALLED_STATION_ID, $calledstationid);

    $racct->putAttribute(RADIUS_CALLING_STATION_ID, $callingstationid);

    // Send request

    $result = $racct->send();

    // Evaluation of the response

    // 5 -> Accounting-Response

    // See RFC2866 for this.

    if (PEAR::isError($result)) {

        $retvalue['acct_val'] = 1;

        $retvalue['error'] = $result->getMessage();

        $retvalue['acct_val'] = 5 ;

        $retvalue['acct_val'] = 1 ;

    // close OO RADIUS_ACCOUNTING

    $racct->close();

    return $retvalue ;

RADIUS ACCOUNTING STOP/UPDATE

-----------------------------

*/

function RADIUS_ACCOUNTING_STOP($ruleno,$username,$sessionid,$start_time,$radiusip,$radiusport,$radiuskey,$clientip,$clientmac, $term_cause = 1, $interimupdate=false,$stop_time = null) {

    $retvalue = array();

    $nas_mac = mac_format(get_interface_mac($config['interfaces']['wan']['if']));

    $clientmac = mac_format($clientmac);

    $nas_port = $ruleno - 10000;

    $radiusvendor = $config['captiveportal']['radiusvendor'] ? $config['captiveportal']['radiusvendor'] : null;

    $stop_time = (empty($stop_time)) ? time() : $stop_time;

    $session_time = $stop_time - $start_time;

    $volume = getVolume($ruleno);

    $volume['input_bytes_radius'] = remainder($volume['input_bytes']);

    $volume['input_gigawords'] = gigawords($volume['input_bytes']);

    $volume['output_bytes_radius'] = remainder($volume['output_bytes']);

    $volume['output_gigawords'] = gigawords($volume['output_bytes']);

    switch($radiusvendor) {

        case 'cisco':

        $calledstationid = $clientmac;

        $callingstationid = $clientip;

        break;

        default:

        $calledstationid = $nas_mac;

        $callingstationid = $clientmac;

    }

    // Create our instance, see if we should use Accounting Interim Updates or Accounting STOP messages

    if ($interimupdate)

        $racct = new Auth_RADIUS_Acct_Update;

    else

        $racct = new Auth_RADIUS_Acct_Stop;

    /*

     * Currently disabled

    At most 10 servers may be specified. 

    When multiple servers are given, they are tried in round-robin fashion until a valid response is received 

    foreach ($radiusservers as $radsrv) {

        // Add a new server to our instance

        $racct->addServer($radsrv['ipaddr'], $radsrv['port'], $radsrv['key']);

    }

    */

    // See RADIUS_ACCOUNTING_START for info

    $racct->authentic = RADIUS_AUTH_RADIUS;

    // Construct data package

    $racct->username = $username;

    $racct->addServer($radiusip, $radiusport, $radiuskey);

    // Set session_time

    $racct->session_time = $session_time;

    if (PEAR::isError($racct->start())) {

        $retvalue['acct_val'] = 1;

        $retvalue['error'] = $racct->getMessage();

        $racct->close();

        return $retvalue;

    }

    // The RADIUS PECL Package doesn't have this vars so we create them ourself

    define("RADIUS_ACCT_INPUT_GIGAWORDS", "52");

    define("RADIUS_ACCT_OUTPUT_GIGAWORDS", "53");

    // Default attributes

    $racct->putAttribute(RADIUS_SERVICE_TYPE, RADIUS_LOGIN);

    $racct->putAttribute(RADIUS_NAS_PORT_TYPE, RADIUS_ETHERNET);

    $racct->putAttribute(RADIUS_NAS_PORT, $nas_port);

    $racct->putAttribute(RADIUS_ACCT_SESSION_ID, $sessionid);

    // Extra data to identify the client and nas

    $racct->putAttribute(RADIUS_FRAMED_IP_ADDRESS, $clientip, "addr");

    $racct->putAttribute(RADIUS_CALLED_STATION_ID, $calledstationid);

    $racct->putAttribute(RADIUS_CALLING_STATION_ID, $callingstationid);

    // Volume stuff: Ingress

    $racct->putAttribute(RADIUS_ACCT_INPUT_PACKETS, $volume['input_pkts'], "integer");

    $racct->putAttribute(RADIUS_ACCT_INPUT_OCTETS, $volume['input_bytes_radius'], "integer");

    $racct->putAttribute(RADIUS_ACCT_INPUT_GIGAWORDS, $volume['input_gigawords'], "integer");

    // Volume stuff: Outgress

    $racct->putAttribute(RADIUS_ACCT_OUTPUT_PACKETS, $volume['output_pkts'], "integer");

    $racct->putAttribute(RADIUS_ACCT_OUTPUT_OCTETS, $volume['output_bytes_radius'], "integer");

    $racct->putAttribute(RADIUS_ACCT_OUTPUT_GIGAWORDS, $volume['output_gigawords'], "integer");

    if (!$interimupdate)

        $racct->putAttribute(RADIUS_ACCT_TERMINATE_CAUSE, $term_cause);

    // Send request

    $result = $racct->send();

    // Evaluation of the response

    // 5 -> Accounting-Response

    // See RFC2866 for this.

    if (PEAR::isError($result)) {

        $retvalue['acct_val'] = 1;

        $retvalue['error'] = $result->getMessage();

        $retvalue['acct_val'] = 5 ;

        $retvalue['acct_val'] = 1 ;

    // close OO RADIUS_ACCOUNTING

    $racct->close();

    return $retvalue;

/**

 * Radius Volume Helpers

 *

 */

function gigawords($bytes) {

    /*

     * RFC2866 Specifies a 32bit unsigned integer, which is a max of 4294967295

     * Currently there is a fault in the PECL radius_put_int function which can handle only 32bit signed integer.

     */

    // We use BCMath functions since normal integers don't work with so large numbers

    $gigawords = bcdiv( bcsub( $bytes, remainder($bytes) ) , 4294967295) ;

    // We need to manually set this to a zero instead of NULL for put_int() safety

    if (is_null($gigawords)) {

        $gigawords = 0;

    }

    return $gigawords;

}

function remainder($bytes) {

    // Calculate the bytes we are going to send to the radius

    $bytes = bcmod($bytes, 4294967295);

    if (is_null($bytes)) {

        $bytes = 0;

    }

    return $bytes;