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<?php
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/*
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openvpn.inc
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Copyright (C) 2004 Peter Curran (peter@closeconsultants.com).
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* include all configuration functions */
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require_once("globals.inc");
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require_once("config.inc");
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require_once("functions.inc");
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function ovpn_configure($reconfigure) {
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global $config;
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if (is_array($config['ovpn']['server']))
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ovpn_config_server($reconfigure);
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if (is_array($config['ovpn']['client']))
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ovpn_config_client();
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return;
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}
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function ovpn_link_tap() {
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/* Add a reference to the tap KLM. If ref count = 1, load it */
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global $g;
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if (!is_file($g['vardb_path'] ."/ovpn_tap_link")){
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$link_count = 1;
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mwexec("/sbin/kldload if_tap");
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$fd = fopen($g['vardb_path'] ."/ovpn_tap_link", 'w');
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}
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else {
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$fd = fopen($g['vardb_path'] ."/ovpn_tap_link", 'r+');
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$link_count = fread($fd);
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$link_count ++;
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}
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fwrite($fd, $link_count);
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fclose($fd);
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return true;
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}
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function ovpn_unlink_tap() {
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/* Remove a reference to the tap KLM. If ref count = 0, unload it */
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global $g;
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if (!is_file($g['vardb_path'] ."/ovpn_tap_link"))
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return false; //no file, no links so why are we called?
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$fd = fopen($g['vardb_path'] ."/ovpn_tap_link", 'r+');
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$link_count = fread($fd);
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$link_count --;
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fwrite($fd, $link_count);
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fclose($fd);
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if ($link_count == 0)
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mwexec("/sbin/kldunload if_tap");
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return true;
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}
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/*****************************/
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/* Server related functions */
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/*****************************/
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function getnxt_server_if($type) {
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/* find the first available device of type $type */
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global $config;
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$a_server = $config['ovpn']['server']['tunnel'];
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$max = ($type == 'tun') ? 17 : 4;
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for ($i = 0; $i < $max ; $i++) {
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$hit = false;
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foreach ($a_server as $server) {
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if ($server['tun_iface'] == $type . $i) {
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$hit = true;
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break;
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}
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}
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if (!$hit)
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return $type . $i;
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}
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return false;
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}
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function getnxt_server_port() {
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/* Get first unused port */
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global $config;
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$a_server = $config['ovpn']['server']['tunnel'];
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$port = 1194;
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while (true) {
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$hit = false;
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foreach ($a_server as $server) {
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if ($server['port'] == $port) {
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$hit = true;
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break;
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}
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}
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if (!$hit)
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if (!ovpn_port_inuse_client($port))
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return $port;
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$port++;
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}
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return false; /* should never get here */
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}
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/* Configure the server */
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function ovpn_config_server($reconfigure) {
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global $config, $g;
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foreach ($config['ovpn']['server']['tunnel'] as $id => $server) {
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/* get tunnel interface */
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$tun = $server['tun_iface'];
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/* kill any running openvpn daemon */
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killbypid($g['varrun_path']."/ovpn_srv_{$tun}.pid");
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if (isset($server['enable'])) {
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if ($g['booting'])
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echo "Starting OpenVPN server $id... ";
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/* send SIGUSR1 to running openvpn daemon */
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if ( $reconfigure == "true" && isset($server['dynip'])) {
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sigkillbypid($g['varrun_path']."/ovpn_srv_{$tun}.pid", "SIGUSR1");
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continue;
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}
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/* Remove old certs & keys */
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unlink_if_exists("{$g['vardb_path']}/ovpn_ca_cert_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_cert_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_key_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_dh_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem");
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unlink_if_exists("{$g['varetc_path']}/ovpn_srv_up_{$tun}.pem");
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unlink_if_exists("{$g['varetc_path']}/ovpn_cli_up_{$tun}.pem");
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/* Copy the TLS-Server certs & keys to disk */
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$fd = fopen("{$g['vardb_path']}/ovpn_ca_cert_{$tun}.pem", "w");
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if ($fd) {
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fwrite($fd, base64_decode($server['ca_cert'])."\n");
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fclose($fd);
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}
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$fd = fopen("{$g['vardb_path']}/ovpn_srv_cert_{$tun}.pem", "w");
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if ($fd) {
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fwrite($fd, base64_decode($server['srv_cert'])."\n");
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fclose($fd);
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}
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touch ("{$g['vardb_path']}/ovpn_srv_key_{$tun}.pem");
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chmod ("{$g['vardb_path']}/ovpn_srv_key_{$tun}.pem", 0600);
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$fd = fopen("{$g['vardb_path']}/ovpn_srv_key_{$tun}.pem", "w");
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if ($fd) {
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fwrite($fd, base64_decode($server['srv_key'])."\n");
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fclose($fd);
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}
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$fd = fopen("{$g['vardb_path']}/ovpn_dh_{$tun}.pem", "w");
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if ($fd) {
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fwrite($fd, base64_decode($server['dh_param'])."\n");
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fclose($fd);
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}
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touch ("{$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem");
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chmod ("{$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem", 0600);
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$fd = fopen("{$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem", "w");
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if ($fd) {
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fwrite($fd, base64_decode($server['pre-shared-key'])."\n");
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fclose($fd);
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}
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/* Start the openvpn daemon */
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mwexec("/usr/local/sbin/openvpn " . ovpn_srv_config_generate($id));
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if ($g['booting'])
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/* Send the boot message */
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echo "done\n";
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}
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else {
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if (!$g['booting']){
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/* stop any processes, unload the tap module */
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/* Remove old certs & keys */
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ovpn_server_kill($tun);
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if ($server['type'] == "tap")
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ovpn_unlink_tap();
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}
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}
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}
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return 0;
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}
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/* Kill off a running server process */
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function ovpn_server_kill($tun) {
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global $g;
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killbypid("{$g['varrun_path']}/ovpn_srv_{$tun}.pid");
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/* Remove old certs & keys */
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unlink_if_exists("{$g['vardb_path']}/ovpn_ca_cert_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_cert_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_key_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_dh_{$tun}.pem");
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unlink_if_exists("{$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem");
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return 0;
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}
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/* Generate the config for a OpenVPN server */
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function ovpn_srv_config_generate($id) {
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global $config, $g;
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$server = $config['ovpn']['server']['tunnel'][$id];
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/* get tunnel interface */
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$tun = $server['tun_iface'];
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/* get optional interface name */
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$iface = ovpn_get_opt_interface($tun);
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/* First the generic stuff:
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- We are a server
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- We are a TLS Server (for authentication)
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- We will run without privilege
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*/
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$ovpn_config = "--daemon --user nobody --group nobody --verb {$server['verb']} --persist-tun --persist-key --status /var/log/openvpn_{$tun}.log 60 ";
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/* pid file */
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$ovpn_config .= "--writepid {$g['varrun_path']}/ovpn_srv_{$tun}.pid ";
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/* interface */
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$ovpn_config .= "--dev {$server['tun_iface']} ";
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/* port */
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$ovpn_config .= "--port {$server['port']} ";
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/* Set protocol being used (p = udp (default), tcp-server)
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if ($server['proto'] == 'tcp') {
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$ovpn_config .= "--proto tcp-server ";
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}
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/* Interface binding - 1 or all */
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if ($server['bind_iface'] != 'all') {
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if ($ipaddr = ovpn_get_ip($server['bind_iface']))
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$ovpn_config .= "--local $ipaddr ";
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else
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return "Interface bridged";
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}
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/* are we using dynamic ip addresses? */
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if (isset($server['dynip']))
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$ovpn_config .= "--persist-remote-ip ";
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/* Client to client routing (off by default) */
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if (isset($server['cli2cli']))
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$ovpn_config .= "--client-to-client ";
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/* Set maximum simultaneous clients */
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$ovpn_config .= "--max-clients {$server['maxcli']} ";
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/* bridging enabled? */
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if (($ifname = $config['interfaces'][$iface]['bridge']) && $server['type'] == "tap") {
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$gateway = $config['interfaces'][$ifname]['ipaddr'];
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$netmask = gen_subnet_mask($config['interfaces'][$ifname]['subnet']);
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$poolstart = $server['ipblock'];
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$poolend = gen_subnet_max($server['ipblock'], $server['prefix']);
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$ovpn_config .= "--server-bridge $gateway $netmask $poolstart $poolend ";
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$lastdigits = substr($tun, 3) + 2;
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$ovpn_srv_up = "/sbin/ifconfig " . $tun . " 127.0.0." . $lastdigits . "/32\n";
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$fd = fopen("{$g['varetc_path']}/ovpn_srv_up_{$tun}.sh", "w");
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if ($fd) {
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fwrite($fd, $ovpn_srv_up);
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fclose($fd);
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chmod ("{$g['varetc_path']}/ovpn_srv_up_{$tun}.sh", 0755);
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$ovpn_config .= "--up /var/etc/ovpn_srv_up_{$tun}.sh ";
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}
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} else {
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/* New --server macro simplifies config */
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$netmask = gen_subnet_mask($server['prefix']);
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$ovpn_config .= "--server {$server['ipblock']} {$netmask} ";
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}
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/* TLS-Server params */
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$ovpn_config .= "--ca {$g['vardb_path']}/ovpn_ca_cert_{$tun}.pem ";
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$ovpn_config .= "--cert {$g['vardb_path']}/ovpn_srv_cert_{$tun}.pem ";
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$ovpn_config .= "--key {$g['vardb_path']}/ovpn_srv_key_{$tun}.pem ";
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$ovpn_config .= "--dh {$g['vardb_path']}/ovpn_dh_{$tun}.pem ";
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/* TLS auth */
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if (isset($server['tlsauth']))
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$ovpn_config .= "--tls-auth {$g['vardb_path']}/ovpn_srv_psk_{$tun}.pem 0 ";
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/* Data channel encryption cipher*/
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$ovpn_config .= "--cipher {$server['crypto']} ";
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314
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/* Duplicate CNs */
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if (isset($server['dupcn']))
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$ovpn_config .= "--duplicate-cn ";
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318
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/* Client push - redirect gateway */
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320
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if (isset($server['psh_options']['redir'])){
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if (isset($server['psh_options']['redir_loc']))
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$ovpn_config .= "--push \"redirect-gateway local\" ";
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else
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$ovpn_config .= "--push \"redirect-gateway\" ";
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}
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/* Client push - route delay */
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if (isset($server['psh_options']['rte_delay']))
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$ovpn_config .= "--push \"route-delay {$server['psh_options']['rte_delay_int']}\" ";
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/* Client push - ping (note we set both server and client) */
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332
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if (isset ($server['psh_options']['ping'])){
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$conflict = true;
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$interval = $server['psh_options']['ping_int'];
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$ovpn_config .= "--ping {$server['psh_options']['ping_int']} ";
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$ovpn_config .= "--push \"ping {$server['psh_options']['ping_int']}\" ";
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}
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339
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/* Client push - ping-restart (note server uses 2 x client interval) */
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340
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if (isset ($server['psh_options']['pingrst'])){
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$conflict = true;
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342
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$interval = $server['psh_options']['pingrst_int'];
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343
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$ovpn_config .= "--ping-restart " . ($interval * 2) . " ";
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344
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$ovpn_config .= "--push \"ping-restart $interval\" ";
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345
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}
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346
|
|
|
347
|
/* Client push - ping-exit (set on client) */
|
|
348
|
if (isset ($server['psh_options']['pingexit'])){
|
|
349
|
$conflict = true;
|
|
350
|
$ovpn_config .= "--ping-exit {$server['psh_options']['pingexit_int']} ";
|
|
351
|
$ovpn_config .= "--push \"ping-exit {$server['psh_options']['pingexit_int']}\" ";
|
|
352
|
}
|
|
353
|
|
|
354
|
/* Client push - inactive (set on client) */
|
|
355
|
if (isset ($server['psh_options']['inact'])){
|
|
356
|
$ovpn_config .= "--inactive {$server['psh_options']['inact_int']} ";
|
|
357
|
$ovpn_config .= "--push \"inactive {$server['psh_options']['inact_int']}\" ";
|
|
358
|
}
|
|
359
|
|
|
360
|
if (!isset($conflict))
|
|
361
|
$ovpn_config .= "--keepalive 10 60 ";
|
|
362
|
|
|
363
|
//trigger_error("OVPN: $ovpn_config", E_USER_NOTICE);
|
|
364
|
return $ovpn_config;
|
|
365
|
}
|
|
366
|
|
|
367
|
/* Define an OVPN Server tunnel interface in the interfaces array and assign a name */
|
|
368
|
function ovpn_server_iface(){
|
|
369
|
global $config, $g;
|
|
370
|
|
|
371
|
foreach ($config['ovpn']['server']['tunnel'] as $id => $server) {
|
|
372
|
if (isset($server['enable'])) {
|
|
373
|
|
|
374
|
/* get tunnel interface */
|
|
375
|
$tun = $server['tun_iface'];
|
|
376
|
|
|
377
|
$i = 1;
|
|
378
|
while (true) {
|
|
379
|
$ifname = 'opt' . $i;
|
|
380
|
if (is_array($config['interfaces'][$ifname])) {
|
|
381
|
if ((isset($config['interfaces'][$ifname]['ovpn']))
|
|
382
|
&& ($config['interfaces'][$ifname]['ovpn'] == "server_{$tun}"))
|
|
383
|
/* Already an interface defined - overwrite */
|
|
384
|
break;
|
|
385
|
}
|
|
386
|
else {
|
|
387
|
/* No existing entry, this is first unused */
|
|
388
|
$config['interfaces'][$ifname] = array();
|
|
389
|
break;
|
|
390
|
}
|
|
391
|
$i++;
|
|
392
|
}
|
|
393
|
$config['interfaces'][$ifname]['descr'] = strtoupper($ifname);
|
|
394
|
$config['interfaces'][$ifname]['if'] = $server['tun_iface'];
|
|
395
|
$config['interfaces'][$ifname]['ipaddr'] = long2ip( ip2long($server['ipblock']) + 1);
|
|
396
|
$config['interfaces'][$ifname]['subnet'] = $server['prefix'];
|
|
397
|
$config['interfaces'][$ifname]['enable'] = isset($server['enable']) ? true : false;
|
|
398
|
$config['interfaces'][$ifname]['ovpn'] = "server_{$tun}";
|
|
399
|
|
|
400
|
write_config();
|
|
401
|
}
|
|
402
|
}
|
|
403
|
return "OpenVPN server interface defined";
|
|
404
|
}
|
|
405
|
|
|
406
|
/* Delete a server interface definition */
|
|
407
|
function ovpn_server_iface_del($tun) {
|
|
408
|
global $config;
|
|
409
|
|
|
410
|
for ($i = 1; is_array($config['interfaces']['opt' . $i]); $i++) {
|
|
411
|
$ifname = 'opt' . $i;
|
|
412
|
if ((isset($config['interfaces'][$ifname]['ovpn']))
|
|
413
|
&& ($config['interfaces'][$ifname]['if'] == "$tun")) {
|
|
414
|
unset($config['interfaces'][$ifname]);
|
|
415
|
break;
|
|
416
|
}
|
|
417
|
}
|
|
418
|
|
|
419
|
|
|
420
|
/* shift down other OPTn interfaces to get rid of holes */
|
|
421
|
$i++;
|
|
422
|
|
|
423
|
/* look at the following OPTn ports */
|
|
424
|
while (is_array($config['interfaces']['opt' . $i])) {
|
|
425
|
$config['interfaces']['opt' . ($i - 1)] =
|
|
426
|
$config['interfaces']['opt' . $i];
|
|
427
|
|
|
428
|
unset($config['interfaces']['opt' . $i]);
|
|
429
|
$i++;
|
|
430
|
}
|
|
431
|
}
|
|
432
|
|
|
433
|
|
|
434
|
/****************************/
|
|
435
|
/* Client related functions */
|
|
436
|
/****************************/
|
|
437
|
|
|
438
|
function getnxt_client_if($type) {
|
|
439
|
/* find the first available device of type $type */
|
|
440
|
global $config;
|
|
441
|
$max = ($type == 'tun') ? 17 : 4;
|
|
442
|
for ($i = 0; $i < $max; $i++) {
|
|
443
|
$hit = false;
|
|
444
|
foreach ($a_client as $client) {
|
|
445
|
if ($client['if'] == $type . $i) {
|
|
446
|
$hit = true;
|
|
447
|
break;
|
|
448
|
}
|
|
449
|
}
|
|
450
|
if (!$hit)
|
|
451
|
return $type . $i;
|
|
452
|
}
|
|
453
|
return false;
|
|
454
|
}
|
|
455
|
|
|
456
|
function getnxt_client_port() {
|
|
457
|
/* Get first unused port */
|
|
458
|
global $config;
|
|
459
|
$a_client = $config['ovpn']['client']['tunnel'];
|
|
460
|
$port = 1194;
|
|
461
|
while (true) {
|
|
462
|
$hit = false;
|
|
463
|
foreach ($a_client as $client) {
|
|
464
|
if ($client['port'] == $port) {
|
|
465
|
$hit = true;
|
|
466
|
break;
|
|
467
|
}
|
|
468
|
}
|
|
469
|
if (!$hit)
|
|
470
|
if (!ovpn_port_inuse_server($port))
|
|
471
|
return $port;
|
|
472
|
$port++;
|
|
473
|
}
|
|
474
|
return false; /* should never get here */
|
|
475
|
}
|
|
476
|
|
|
477
|
/* Port in use */
|
|
478
|
function ovpn_port_inuse_client($port){
|
|
479
|
global $config;
|
|
480
|
$a_client = $config['ovpn']['client']['tunnel'];
|
|
481
|
foreach ($a_client as $client) {
|
|
482
|
if ($client['port'] == $port) {
|
|
483
|
return true;
|
|
484
|
}
|
|
485
|
}
|
|
486
|
return false;
|
|
487
|
}
|
|
488
|
|
|
489
|
function ovpn_config_client() {
|
|
490
|
/* Boot time configuration */
|
|
491
|
global $config, $g;
|
|
492
|
|
|
493
|
foreach ($config['ovpn']['client']['tunnel'] as $id => $client) {
|
|
494
|
|
|
495
|
/* get tunnel interface */
|
|
496
|
$tun = $client['if'];
|
|
497
|
|
|
498
|
/* kill any running openvpn daemon */
|
|
499
|
killbypid($g['varrun_path']."/ovpn_cli_{$tun}.pid");
|
|
500
|
|
|
501
|
if (isset($client['enable'])) {
|
|
502
|
|
|
503
|
if ($g['booting'])
|
|
504
|
echo "Starting OpenVPN client $id... ";
|
|
505
|
|
|
506
|
/* Remove old certs & keys */
|
|
507
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_ca_cert_{$tun}.pem");
|
|
508
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_cert_{$tun}.pem");
|
|
509
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_key_{$tun}.pem");
|
|
510
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem");
|
|
511
|
unlink_if_exists("{$g['varetc_path']}/ovpn_cli_up_{$tun}.pem");
|
|
512
|
|
|
513
|
/* Copy the TLS-Client certs & keys to disk */
|
|
514
|
$fd = fopen("{$g['vardb_path']}/ovpn_cli_ca_cert_{$tun}.pem", "w");
|
|
515
|
if ($fd) {
|
|
516
|
fwrite($fd, base64_decode($client['ca_cert'])."\n");
|
|
517
|
fclose($fd);
|
|
518
|
}
|
|
519
|
else
|
|
520
|
trigger_error("OVPN: No open for CA", E_USER_NOTICE);
|
|
521
|
$fd = fopen("{$g['vardb_path']}/ovpn_cli_cert_{$tun}.pem", "w");
|
|
522
|
if ($fd) {
|
|
523
|
fwrite($fd, base64_decode($client['cli_cert'])."\n");
|
|
524
|
fclose($fd);
|
|
525
|
}
|
|
526
|
touch ("{$g['vardb_path']}/ovpn_cli_key_{$tun}.pem");
|
|
527
|
chmod ("{$g['vardb_path']}/ovpn_cli_key_{$tun}.pem", 0600);
|
|
528
|
$fd = fopen("{$g['vardb_path']}/ovpn_cli_key_{$tun}.pem", "w");
|
|
529
|
if ($fd) {
|
|
530
|
fwrite($fd, base64_decode($client['cli_key'])."\n");
|
|
531
|
fclose($fd);
|
|
532
|
}
|
|
533
|
touch ("{$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem");
|
|
534
|
chmod ("{$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem", 0600);
|
|
535
|
$fd = fopen("{$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem", "w");
|
|
536
|
if ($fd) {
|
|
537
|
fwrite($fd, base64_decode($client['pre-shared-key'])."\n");
|
|
538
|
fclose($fd);
|
|
539
|
}
|
|
540
|
|
|
541
|
/* Start openvpn for this client */
|
|
542
|
mwexec("/usr/local/sbin/openvpn " . ovpn_cli_config_generate($id));
|
|
543
|
|
|
544
|
if ($g['booting'])
|
|
545
|
/* Send the boot message */
|
|
546
|
echo "done\n";
|
|
547
|
}
|
|
548
|
else {
|
|
549
|
if (!$g['booting']){
|
|
550
|
/* stop any processes, unload the tap module */
|
|
551
|
/* Remove old certs & keys */
|
|
552
|
ovpn_client_kill($tun);
|
|
553
|
|
|
554
|
if ($client['type'] == "tap")
|
|
555
|
ovpn_unlink_tap();
|
|
556
|
}
|
|
557
|
}
|
|
558
|
}
|
|
559
|
return 0;
|
|
560
|
|
|
561
|
}
|
|
562
|
|
|
563
|
/* Kill off a running client process */
|
|
564
|
function ovpn_client_kill($tun) {
|
|
565
|
global $g;
|
|
566
|
|
|
567
|
killbypid("{$g['varrun_path']}/ovpn_cli_{$tun}.pid");
|
|
568
|
|
|
569
|
/* Remove old certs & keys */
|
|
570
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_ca_cert_{$tun}.pem");
|
|
571
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_cert_{$tun}.pem");
|
|
572
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_key_{$tun}.pem");
|
|
573
|
unlink_if_exists("{$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem");
|
|
574
|
|
|
575
|
return 0;
|
|
576
|
}
|
|
577
|
|
|
578
|
/* Generate the config for a OpenVPN client */
|
|
579
|
function ovpn_cli_config_generate($id) {
|
|
580
|
/* configure the named client */
|
|
581
|
global $config, $g;
|
|
582
|
$client = $config['ovpn']['client']['tunnel'][$id];
|
|
583
|
|
|
584
|
/* get tunnel interface */
|
|
585
|
$tun = $client['if'];
|
|
586
|
|
|
587
|
/* get optional interface name */
|
|
588
|
$iface = ovpn_get_opt_interface($tun);
|
|
589
|
|
|
590
|
/* Client support in 2.0 is very simple */
|
|
591
|
$ovpn_config = "--client --daemon --verb 1 --status /var/log/openvpn_{$tun}.log 60 ";
|
|
592
|
|
|
593
|
/* pid file */
|
|
594
|
$ovpn_config .= "--writepid {$g['varrun_path']}/ovpn_cli_{$tun}.pid ";
|
|
595
|
|
|
596
|
/* interface */
|
|
597
|
$ovpn_config .= "--dev {$client['if']} ";
|
|
598
|
|
|
599
|
/* protocol */
|
|
600
|
/* Set protocol being used (p = udp (default), tcp-client)
|
|
601
|
if ($client['proto'] == 'tcp') {
|
|
602
|
$ovpn_config .= "--proto tcp-client ";
|
|
603
|
}
|
|
604
|
|
|
605
|
/* port */
|
|
606
|
$ovpn_config .= "--lport {$client['port']} ";
|
|
607
|
|
|
608
|
/* server location */
|
|
609
|
$ovpn_config .= "--remote {$client['saddr']} {$client['sport']} ";
|
|
610
|
|
|
611
|
/* bridging enabled? */
|
|
612
|
if (($ifname = $config['interfaces'][$iface]['bridge']) && $client['type'] == "tap") {
|
|
613
|
$lastdigits = substr($tun, 3) + 2;
|
|
614
|
$ovpn_srv_up = "/sbin/ifconfig " . $tun . " 127.0.0." . $lastdigits . "/32\n";
|
|
615
|
|
|
616
|
$fd = fopen("{$g['varetc_path']}/ovpn_cli_up_{$tun}.sh", "w");
|
|
617
|
if ($fd) {
|
|
618
|
fwrite($fd, $ovpn_cli_up);
|
|
619
|
fclose($fd);
|
|
620
|
chmod ("{$g['varetc_path']}/ovpn_cli_up_{$tun}.sh", 0755);
|
|
621
|
$ovpn_config .= "--up /var/etc/ovpn_cli_up_{$tun}.sh ";
|
|
622
|
}
|
|
623
|
}
|
|
624
|
|
|
625
|
/* TLS-Client params */
|
|
626
|
$ovpn_config .= "--ca {$g['vardb_path']}/ovpn_cli_ca_cert_{$tun}.pem ";
|
|
627
|
$ovpn_config .= "--cert {$g['vardb_path']}/ovpn_cli_cert_{$tun}.pem ";
|
|
628
|
$ovpn_config .= "--key {$g['vardb_path']}/ovpn_cli_key_{$tun}.pem ";
|
|
629
|
|
|
630
|
/* TLS auth */
|
|
631
|
if (isset($client['tlsauth']))
|
|
632
|
$ovpn_config .= "--tls-auth {$g['vardb_path']}/ovpn_cli_psk_{$tun}.pem 1 ";
|
|
633
|
|
|
634
|
/* Data channel encryption cipher*/
|
|
635
|
$ovpn_config .= "--cipher {$client['crypto']} ";
|
|
636
|
|
|
637
|
//trigger_error("OVPN: $ovpn_config", E_USER_NOTICE);
|
|
638
|
return $ovpn_config;
|
|
639
|
}
|
|
640
|
|
|
641
|
/* Define an OVPN tunnel interface in the interfaces array for each client */
|
|
642
|
function ovpn_client_iface(){
|
|
643
|
global $config;
|
|
644
|
|
|
645
|
foreach ($config['ovpn']['client']['tunnel'] as $id => $client) {
|
|
646
|
if (isset($client['enable'])) {
|
|
647
|
|
|
648
|
/* get tunnel interface */
|
|
649
|
$tun = $client['if'];
|
|
650
|
|
|
651
|
$i = 1;
|
|
652
|
while (true) {
|
|
653
|
$ifname = 'opt' . $i;
|
|
654
|
if (is_array($config['interfaces'][$ifname])) {
|
|
655
|
if ((isset($config['interfaces'][$ifname]['ovpn']))
|
|
656
|
&& ($config['interfaces'][$ifname]['ovpn'] == "client_{$tun}"))
|
|
657
|
/* Already an interface defined - overwrite */
|
|
658
|
break;
|
|
659
|
}
|
|
660
|
else {
|
|
661
|
/* No existing entry, this is first unused */
|
|
662
|
$config['interfaces'][$ifname] = array();
|
|
663
|
break;
|
|
664
|
}
|
|
665
|
$i++;
|
|
666
|
}
|
|
667
|
$config['interfaces'][$ifname]['descr'] = strtoupper($ifname);
|
|
668
|
$config['interfaces'][$ifname]['if'] = $client['if'];
|
|
669
|
$config['interfaces'][$ifname]['ipaddr'] = "0.0.0.0";
|
|
670
|
$config['interfaces'][$ifname]['subnet'] = "0";
|
|
671
|
$config['interfaces'][$ifname]['enable'] = isset($client['enable']) ? true : false;
|
|
672
|
$config['interfaces'][$ifname]['ovpn'] = "client_{$tun}";
|
|
673
|
write_config();
|
|
674
|
}
|
|
675
|
}
|
|
676
|
return "OpenVPN client interfaces defined";
|
|
677
|
}
|
|
678
|
|
|
679
|
/* Delete a client interface definition */
|
|
680
|
function ovpn_client_iface_del($tun) {
|
|
681
|
global $config;
|
|
682
|
|
|
683
|
for ($i = 1; is_array($config['interfaces']['opt' . $i]); $i++) {
|
|
684
|
$ifname = 'opt' . $i;
|
|
685
|
if ((isset($config['interfaces'][$ifname]['ovpn']))
|
|
686
|
&& ($config['interfaces'][$ifname]['if'] == "$tun")) {
|
|
687
|
unset($config['interfaces'][$ifname]);
|
|
688
|
break;
|
|
689
|
}
|
|
690
|
}
|
|
691
|
|
|
692
|
|
|
693
|
/* shift down other OPTn interfaces to get rid of holes */
|
|
694
|
$i++;
|
|
695
|
|
|
696
|
/* look at the following OPTn ports */
|
|
697
|
while (is_array($config['interfaces']['opt' . $i])) {
|
|
698
|
$config['interfaces']['opt' . ($i - 1)] =
|
|
699
|
$config['interfaces']['opt' . $i];
|
|
700
|
|
|
701
|
unset($config['interfaces']['opt' . $i]);
|
|
702
|
$i++;
|
|
703
|
}
|
|
704
|
}
|
|
705
|
|
|
706
|
|
|
707
|
/******************/
|
|
708
|
/* Misc functions */
|
|
709
|
|
|
710
|
/* Calculate the last address in a range given the start and /prefix */
|
|
711
|
function ovpn_calc_end($start, $prefix){
|
|
712
|
|
|
713
|
$first = ip2long($start);
|
|
714
|
$last = pow(2,(32 - $prefix)) - 1 + $first;
|
|
715
|
return long2ip($last);
|
|
716
|
}
|
|
717
|
|
|
718
|
/* Calculate a mask given a /prefix */
|
|
719
|
function ovpn_calc_mask($prefix){
|
|
720
|
|
|
721
|
return long2ip(ip2long("255.255.255.255") - (pow( 2, (32 - $prefix)) - 1));
|
|
722
|
}
|
|
723
|
|
|
724
|
/* Port in use */
|
|
725
|
function ovpn_port_inuse_server($port){
|
|
726
|
global $config;
|
|
727
|
$a_server = $config['ovpn']['server']['tunnel'];
|
|
728
|
foreach ($a_server as $server) {
|
|
729
|
if ($server['port'] == $port) {
|
|
730
|
return true;
|
|
731
|
}
|
|
732
|
}
|
|
733
|
return false;
|
|
734
|
}
|
|
735
|
|
|
736
|
/* Read in a file from the $_FILES array */
|
|
737
|
function ovpn_get_file($file){
|
|
738
|
global $g;
|
|
739
|
|
|
740
|
if (!is_uploaded_file($_FILES[$file]['tmp_name'])){
|
|
741
|
trigger_error("Bad file upload".$_FILES[$file]['error'], E_USER_NOTICE);
|
|
742
|
return NULL;
|
|
743
|
}
|
|
744
|
$contents = file_get_contents($_FILES[$file]['tmp_name']);
|
|
745
|
return $contents;
|
|
746
|
}
|
|
747
|
|
|
748
|
|
|
749
|
/* Get the IP address of a specified interface */
|
|
750
|
function ovpn_get_ip($iface){
|
|
751
|
global $config;
|
|
752
|
|
|
753
|
if ($iface == 'wan')
|
|
754
|
return get_current_wan_address();
|
|
755
|
|
|
756
|
if ($config['interfaces'][$iface]['bridge'])
|
|
757
|
/* No bridging (yet) */
|
|
758
|
return false;
|
|
759
|
return $config['interfaces'][$iface]['ipaddr'];
|
|
760
|
}
|
|
761
|
|
|
762
|
|
|
763
|
/* Get a list of the cipher options supported by OpenVPN */
|
|
764
|
function ovpn_get_cipher_list(){
|
|
765
|
|
|
766
|
/* exec("/usr/local/sbin/openvpn --show-ciphers", $raw);
|
|
767
|
print_r ($raw);
|
|
768
|
|
|
769
|
$ciphers = preg_grep('/ bit default key /', $raw);
|
|
770
|
|
|
771
|
for($i = 0; $i <count($ciphers); $i++){
|
|
772
|
$tmp = explode(' ',$ciphers[$i]);
|
|
773
|
$cipher_list["$tmp[0]"] = "{$tmp[0]} ({$tmp[1]} {$tmp[2]})";
|
|
774
|
}
|
|
775
|
*/
|
|
776
|
$cipher_list = array('DES-CBC' => 'DES-CBC (64 bit)',
|
|
777
|
'RC2-CBC' => 'RC2-CBC (128 bit)',
|
|
778
|
'DES-EDE-CBC' => 'DES-EDE-CBC (128 bit)',
|
|
779
|
'DES-EDE3-CBC' => 'DES-EDE3-CBC (192 bit)',
|
|
780
|
'DESX-CBC' => 'DESX-CBC (192 bit)',
|
|
781
|
'BF-CBC' => 'BF-CBC (128 bit)',
|
|
782
|
'RC2-40-CBC' => 'RC2-40-CBC (40 bit)',
|
|
783
|
'CAST5-CBC' => 'CAST5-CBC (128 bit)',
|
|
784
|
'RC5-CBC' => 'RC5-CBC (128 bit)',
|
|
785
|
'RC2-64-CBC' => 'RC2-64-CBC (64 bit)',
|
|
786
|
'AES-128-CBC' => 'AES-128-CBC (128 bit)',
|
|
787
|
'AES-192-CBC' => 'AES-192-CBC (192 bit)',
|
|
788
|
'AES-256-CBC' => 'AES-256-CBC (256 bit)');
|
|
789
|
return $cipher_list;
|
|
790
|
}
|
|
791
|
|
|
792
|
|
|
793
|
/* Get optional interface */
|
|
794
|
/* needs tunneling interface (tun0, tun1, tap0, ...) */
|
|
795
|
/* returns optional interface name (opt2, opt3, ...) */
|
|
796
|
function ovpn_get_opt_interface($tun){
|
|
797
|
global $config;
|
|
798
|
|
|
799
|
for ($i = 1; isset($config['interfaces']['opt' . $i]); $i++) {
|
|
800
|
$ifname = 'opt' . $i;
|
|
801
|
|
|
802
|
if (isset($config['interfaces']['opt' . $i]['ovpn']))
|
|
803
|
if ($config['interfaces'][$ifname]['if'] == "$tun")
|
|
804
|
return $ifname;
|
|
805
|
}
|
|
806
|
/* not found? */
|
|
807
|
return false;
|
|
808
|
}
|
|
809
|
|
|
810
|
/* Build a list of the current real interfaces */
|
|
811
|
function ovpn_real_interface_list(){
|
|
812
|
global $config;
|
|
813
|
|
|
814
|
$interfaces = array('all' => 'ALL',
|
|
815
|
'lan' => 'LAN',
|
|
816
|
'wan' => 'WAN');
|
|
817
|
for ($i = 1; isset($config['interfaces']['opt' . $i]); $i++) {
|
|
818
|
if (isset($config['interfaces']['opt' . $i]['ovpn']))
|
|
819
|
/* Hide our own interface */
|
|
820
|
break;
|
|
821
|
if (isset($config['interfaces']['opt' . $i]['enable']))
|
|
822
|
$interfaces['opt' . $i] = $config['interfaces']['opt' . $i]['descr'];
|
|
823
|
}
|
|
824
|
return $interfaces;
|
|
825
|
}
|
|
826
|
|
|
827
|
|
|
828
|
/* lock openvpn information, decide that the lock file is stale after
|
|
829
|
10 seconds */
|
|
830
|
function ovpn_lock() {
|
|
831
|
|
|
832
|
global $g;
|
|
833
|
|
|
834
|
$lockfile = "{$g['varrun_path']}/ovpn.lock";
|
|
835
|
|
|
836
|
$n = 0;
|
|
837
|
while ($n < 10) {
|
|
838
|
/* open the lock file in append mode to avoid race condition */
|
|
839
|
if ($fd = fopen($lockfile, "x")) {
|
|
840
|
/* succeeded */
|
|
841
|
fclose($fd);
|
|
842
|
return;
|
|
843
|
} else {
|
|
844
|
/* file locked, wait and try again */
|
|
845
|
sleep(1);
|
|
846
|
$n++;
|
|
847
|
}
|
|
848
|
}
|
|
849
|
}
|
|
850
|
|
|
851
|
/* unlock configuration file */
|
|
852
|
function ovpn_unlock() {
|
|
853
|
|
|
854
|
global $g;
|
|
855
|
|
|
856
|
$lockfile = "{$g['varrun_path']}/ovpn.lock";
|
|
857
|
|
|
858
|
if (file_exists($lockfile))
|
|
859
|
unlink($lockfile);
|
|
860
|
}
|
|
861
|
|
|
862
|
?>
|