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-rw-r--r--etc/inc/interfaces.inc740
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diff --git a/etc/inc/interfaces.inc b/etc/inc/interfaces.inc
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+++ b/etc/inc/interfaces.inc
@@ -0,0 +1,740 @@
+<?php
+/*
+ interfaces.inc
+ part of m0n0wall (http://m0n0.ch/wall)
+
+ Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED ``AS IS'' AND 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
+ AUTHOR 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, EVEN IF ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/* include all configuration functions */
+require_once("functions.inc");
+
+function interfaces_loopback_configure() {
+ global $config, $g;
+
+ mwexec("/sbin/ifconfig lo0 127.0.0.1");
+
+ return 0;
+}
+
+function interfaces_vlan_configure() {
+ global $config, $g;
+
+ if (is_array($config['vlans']['vlan']) && count($config['vlans']['vlan'])) {
+
+ /* load the VLAN module */
+ mwexec("/sbin/kldload if_vlan");
+
+ /* devices with native VLAN support */
+ $vlan_native_supp = explode(" ", "bge em gx nge ti txp");
+
+ /* devices with long frame support */
+ $vlan_long_supp = explode(" ", "dc fxp sis ste tl tx xl");
+
+ $i = 0;
+
+ foreach ($config['vlans']['vlan'] as $vlan) {
+
+ $cmd = "/sbin/ifconfig vlan{$i} create vlan " .
+ escapeshellarg($vlan['tag']) . " vlandev " .
+ escapeshellarg($vlan['if']);
+
+ /* get driver name */
+ for ($j = 0; $j < strlen($vlan['if']); $j++) {
+ if ($vlan['if'][$j] >= '0' && $vlan['if'][$j] <= '9')
+ break;
+ }
+ $drvname = substr($vlan['if'], 0, $j);
+
+ if (in_array($drvname, $vlan_native_supp))
+ $cmd .= " link0";
+ else if (in_array($drvname, $vlan_long_supp))
+ $cmd .= " mtu 1500";
+
+ mwexec($cmd);
+
+ /* make sure the parent interface is up */
+ mwexec("/sbin/ifconfig " . escapeshellarg($vlan['if']) . " up");
+
+ $i++;
+ }
+ }
+
+ return 0;
+}
+
+function interfaces_lan_configure() {
+ global $config, $g;
+
+ if ($g['booting'])
+ echo "Configuring LAN interface... ";
+
+ $lancfg = $config['interfaces']['lan'];
+
+ /* wireless configuration? */
+ if (is_array($lancfg['wireless']))
+ interfaces_wireless_configure($lancfg['if'], $lancfg['wireless']);
+
+ /* MAC spoofing? */
+ if ($lancfg['spoofmac'])
+ mwexec("/sbin/ifconfig " . escapeshellarg($lancfg['if']) .
+ " link " . escapeshellarg($lancfg['spoofmac']));
+
+ /* media */
+ if ($lancfg['media'] || $lancfg['mediaopt']) {
+ $cmd = "/sbin/ifconfig " . escapeshellarg($lancfg['if']);
+ if ($lancfg['media'])
+ $cmd .= " media " . escapeshellarg($lancfg['media']);
+ if ($lancfg['mediaopt'])
+ $cmd .= " mediaopt " . escapeshellarg($lancfg['mediaopt']);
+ mwexec($cmd);
+ }
+
+ mwexec("/sbin/ifconfig " . escapeshellarg($lancfg['if']) . " " .
+ escapeshellarg($lancfg['ipaddr'] . "/" . $lancfg['subnet']));
+
+ if (!$g['booting']) {
+ /* make new hosts file */
+ system_hosts_generate();
+
+ /* reconfigure static routes (kernel may have deleted them) */
+ system_routing_configure();
+
+ /* reload ipfilter (address may have changed) */
+ filter_configure();
+
+ /* reload shaper (subnet may have changed) */
+ shaper_configure();
+
+ /* reload IPsec tunnels */
+ vpn_ipsec_configure();
+
+ /* reload dhcpd (gateway may have changed) */
+ services_dhcpd_configure();
+
+ /* reload dnsmasq */
+ services_dnsmasq_configure();
+
+ /* reload webgui */
+ system_webgui_start();
+
+ /* reload captive portal */
+ captiveportal_configure();
+ }
+
+ if ($g['booting'])
+ echo "done\n";
+
+ return 0;
+}
+
+function interfaces_optional_configure() {
+ global $config, $g;
+ global $bridgeconfig;
+
+ /* Reset bridge configuration. Interfaces will add to it. */
+ $bridgeconfig = "";
+
+ for ($i = 1; isset($config['interfaces']['opt' . $i]); $i++) {
+ interfaces_optional_configure_if($i);
+ }
+
+ if ($bridgeconfig) {
+ /* Set the system bridge configuration and enable bridging. */
+ mwexec("/sbin/sysctl net.link.ether.bridge_cfg=" . $bridgeconfig);
+
+ if (isset($config['bridge']['filteringbridge']))
+ mwexec("/sbin/sysctl net.link.ether.bridge_ipf=1");
+
+ mwexec("/sbin/sysctl net.link.ether.bridge=1");
+ } else {
+ mwexec("/sbin/sysctl net.link.ether.bridge_ipf=0");
+ mwexec("/sbin/sysctl net.link.ether.bridge=0");
+ }
+
+ if (!$g['booting']) {
+ /* reconfigure static routes (kernel may have deleted them) */
+ system_routing_configure();
+
+ /* reload ipfilter (address may have changed) */
+ filter_configure();
+
+ /* reload shaper (address may have changed) */
+ shaper_configure();
+
+ /* reload IPsec tunnels */
+ vpn_ipsec_configure();
+
+ /* reload dhcpd (interface enabled/disabled/bridged status may have changed) */
+ services_dhcpd_configure();
+
+ /* restart dnsmasq */
+ services_dnsmasq_configure();
+ }
+
+ return 0;
+}
+
+function interfaces_optional_configure_if($opti) {
+ global $config, $g;
+ global $bridgeconfig;
+
+ $optcfg = $config['interfaces']['opt' . $opti];
+
+ if ($g['booting']) {
+ $optdescr = "";
+ if ($optcfg['descr'])
+ $optdescr = " ({$optcfg['descr']})";
+ echo "Configuring OPT{$opti}{$optdescr} interface... ";
+ }
+
+ if (isset($optcfg['enable'])) {
+ /* wireless configuration? */
+ if (is_array($optcfg['wireless']))
+ interfaces_wireless_configure($optcfg['if'], $optcfg['wireless']);
+
+ /* MAC spoofing? */
+ if ($optcfg['spoofmac'])
+ mwexec("/sbin/ifconfig " . escapeshellarg($optcfg['if']) .
+ " link " . escapeshellarg($optcfg['spoofmac']));
+
+ /* media */
+ if ($optcfg['media'] || $optcfg['mediaopt']) {
+ $cmd = "/sbin/ifconfig " . escapeshellarg($optcfg['if']);
+ if ($optcfg['media'])
+ $cmd .= " media " . escapeshellarg($optcfg['media']);
+ if ($optcfg['mediaopt'])
+ $cmd .= " mediaopt " . escapeshellarg($optcfg['mediaopt']);
+ mwexec($cmd);
+ }
+
+ /* OpenVPN configuration? */
+ if (isset($optcfg['ovpn'])) {
+ if (strstr($if, "tap"))
+ ovpn_link_tap();
+ }
+
+ /* bridged? */
+ if ($optcfg['bridge']) {
+ mwexec("/sbin/ifconfig " . escapeshellarg($optcfg['if']) .
+ " delete up");
+
+ if ($bridgeconfig != "")
+ $bridgeconfig .= ",";
+
+ $bridgeconfig .= $optcfg['if'] . ":" . $opti . "," .
+ $config['interfaces'][$optcfg['bridge']]['if'] .
+ ":" . $opti;
+ } else {
+ mwexec("/sbin/ifconfig " . escapeshellarg($optcfg['if']) . " " .
+ escapeshellarg($optcfg['ipaddr'] . "/" . $optcfg['subnet']));
+ }
+ } else {
+ mwexec("/sbin/ifconfig " . escapeshellarg($optcfg['if']) .
+ " delete down");
+ }
+
+ if ($g['booting'])
+ echo "done\n";
+
+ return 0;
+}
+
+function interfaces_wireless_configure($if, $wlcfg) {
+ global $config, $g;
+
+ /* wireless configuration */
+ $ifcargs = escapeshellarg($if) .
+ " ssid " . escapeshellarg($wlcfg['ssid']) . " channel " .
+ escapeshellarg($wlcfg['channel']) . " ";
+
+ if ($wlcfg['stationname'])
+ $ifcargs .= "stationname " . escapeshellarg($wlcfg['stationname']) . " ";
+
+ if (isset($wlcfg['wep']['enable']) && is_array($wlcfg['wep']['key'])) {
+ $ifcargs .= "wepmode on ";
+
+ $i = 1;
+ foreach ($wlcfg['wep']['key'] as $wepkey) {
+ $ifcargs .= "wepkey " . escapeshellarg("{$i}:{$wepkey['value']}") . " ";
+ if (isset($wepkey['txkey'])) {
+ $ifcargs .= "weptxkey {$i} ";
+ }
+ $i++;
+ }
+ } else {
+ $ifcargs .= "wepmode off ";
+ }
+
+ switch ($wlcfg['mode']) {
+ case 'hostap':
+ if (strstr($if, "wi"))
+ $ifcargs .= "-mediaopt ibss mediaopt hostap ";
+ break;
+ case 'ibss':
+ case 'IBSS':
+ if (strstr($if, "wi"))
+ $ifcargs .= "-mediaopt hostap mediaopt ibss ";
+ else if (strstr($if, "an"))
+ $ifcargs .= "mediaopt adhoc ";
+ break;
+ case 'bss':
+ case 'BSS':
+ if (strstr($if, "wi"))
+ $ifcargs .= "-mediaopt hostap -mediaopt ibss ";
+ else if (strstr($if, "an"))
+ $ifcargs .= "-mediaopt adhoc ";
+ break;
+ }
+
+ $ifcargs .= "up";
+
+ mwexec("/sbin/ifconfig " . $ifcargs);
+
+ return 0;
+}
+
+function interfaces_wan_configure() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+
+ if ($g['booting'])
+ echo "Configuring WAN interface... ";
+ else {
+ /* kill dhclient */
+ killbypid("{$g['varrun_path']}/dhclient.pid");
+
+ /* kill PPPoE client (mpd) */
+ killbypid("{$g['varrun_path']}/mpd.pid");
+
+ /* wait for processes to die */
+ sleep(2);
+
+ /* remove dhclient.conf, if it exists */
+ if (file_exists("{$g['varetc_path']}/dhclient.conf")) {
+ unlink("{$g['varetc_path']}/dhclient.conf");
+ }
+ /* remove mpd.conf, if it exists */
+ if (file_exists("{$g['varetc_path']}/mpd.conf")) {
+ unlink("{$g['varetc_path']}/mpd.conf");
+ }
+ /* remove mpd.links, if it exists */
+ if (file_exists("{$g['varetc_path']}/mpd.links")) {
+ unlink("{$g['varetc_path']}/mpd.links");
+ }
+ /* remove wanip, if it exists */
+ if (file_exists("{$g['vardb_path']}/wanip")) {
+ unlink("{$g['vardb_path']}/wanip");
+ }
+ }
+
+ /* remove all addresses first */
+ while (mwexec("/sbin/ifconfig " . escapeshellarg($wancfg['if']) . " -alias") == 0);
+ mwexec("/sbin/ifconfig " . escapeshellarg($wancfg['if']) . " down");
+
+ /* wireless configuration? */
+ if (is_array($wancfg['wireless']))
+ interfaces_wireless_configure($wancfg['if'], $wancfg['wireless']);
+
+ if ($wancfg['spoofmac'])
+ mwexec("/sbin/ifconfig " . escapeshellarg($wancfg['if']) .
+ " link " . escapeshellarg($wancfg['spoofmac']));
+
+ /* media */
+ if ($wancfg['media'] || $wancfg['mediaopt']) {
+ $cmd = "/sbin/ifconfig " . escapeshellarg($wancfg['if']);
+ if ($wancfg['media'])
+ $cmd .= " media " . escapeshellarg($wancfg['media']);
+ if ($wancfg['mediaopt'])
+ $cmd .= " mediaopt " . escapeshellarg($wancfg['mediaopt']);
+ mwexec($cmd);
+ }
+
+ switch ($wancfg['ipaddr']) {
+
+ case 'dhcp':
+ interfaces_wan_dhcp_configure();
+ break;
+
+ case 'pppoe':
+ interfaces_wan_pppoe_configure();
+ break;
+
+ case 'pptp':
+ interfaces_wan_pptp_configure();
+ break;
+
+ case 'bigpond':
+ /* just configure DHCP for now; fire up bpalogin when we've got the lease */
+ interfaces_wan_dhcp_configure();
+ break;
+
+ default:
+ mwexec("/sbin/ifconfig " . escapeshellarg($wancfg['if']) . " " .
+ escapeshellarg($wancfg['ipaddr'] . "/" . $wancfg['subnet']));
+
+ /* install default route */
+ mwexec("/sbin/route delete default");
+ mwexec("/sbin/route add default " . escapeshellarg($wancfg['gateway']));
+
+ /* resync ipfilter (done automatically for DHCP/PPPoE/PPTP) */
+ filter_resync();
+ }
+
+ if (!$g['booting']) {
+ /* reconfigure static routes (kernel may have deleted them) */
+ system_routing_configure();
+
+ /* reload ipfilter */
+ filter_configure();
+
+ /* reload shaper */
+ shaper_configure();
+
+ /* reload ipsec tunnels */
+ vpn_ipsec_configure();
+
+ /* restart ez-ipupdate */
+ services_dyndns_configure();
+
+ /* restart dnsmasq */
+ services_dnsmasq_configure();
+ }
+
+ if ($g['booting'])
+ echo "done\n";
+
+ return 0;
+}
+
+function interfaces_wan_dhcp_configure() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+
+ /* generate dhclient.conf */
+ $fd = fopen("{$g['varetc_path']}/dhclient.conf", "w");
+ if (!$fd) {
+ printf("Error: cannot open dhclient.conf in interfaces_wan_dhcp_configure().\n");
+ return 1;
+ }
+
+ $dhclientconf = "";
+
+ if ($wancfg['dhcphostname']) {
+ $dhclientconf .= <<<EOD
+send dhcp-client-identifier "{$wancfg['dhcphostname']}";
+interface "{$wancfg['if']}" {
+ send host-name "{$wancfg['dhcphostname']}";
+}
+
+EOD;
+ }
+
+ fwrite($fd, $dhclientconf);
+ fclose($fd);
+
+ /* fire up dhclient - don't wait for the lease (-nw) */
+ mwexec("/sbin/dhclient -nw -cf {$g['varetc_path']}/dhclient.conf " .
+ escapeshellarg($wancfg['if']) . " &");
+
+ return 0;
+}
+
+function interfaces_wan_pppoe_configure() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+ $pppoecfg = $config['pppoe'];
+
+ /* generate mpd.conf */
+ $fd = fopen("{$g['varetc_path']}/mpd.conf", "w");
+ if (!$fd) {
+ printf("Error: cannot open mpd.conf in interfaces_wan_pppoe_configure().\n");
+ return 1;
+ }
+
+ $idle = 0;
+
+ if (isset($pppoecfg['ondemand'])) {
+ $ondemand = "enable";
+ if ($pppoecfg['timeout'])
+ $idle = $pppoecfg['timeout'];
+ } else {
+ $ondemand = "disable";
+ }
+
+ $mpdconf = <<<EOD
+pppoe:
+ new -i ng0 pppoe pppoe
+ set iface route default
+ set iface {$ondemand} on-demand
+ set iface idle {$idle}
+ set iface up-script /usr/local/sbin/ppp-linkup
+
+EOD;
+
+ if (isset($pppoecfg['ondemand'])) {
+ $mpdconf .= <<<EOD
+ set iface addrs 10.0.0.1 10.0.0.2
+
+EOD;
+ }
+
+ $mpdconf .= <<<EOD
+ set bundle disable multilink
+ set bundle authname "{$pppoecfg['username']}"
+ set bundle password "{$pppoecfg['password']}"
+ set link keep-alive 10 60
+ set link max-redial 0
+ set link no acfcomp protocomp
+ set link disable pap chap
+ set link accept chap
+ set link mtu 1492
+ set ipcp yes vjcomp
+ set ipcp ranges 0.0.0.0/0 0.0.0.0/0
+ set ipcp enable req-pri-dns
+ set ipcp enable req-sec-dns
+ open iface
+
+EOD;
+
+ fwrite($fd, $mpdconf);
+ fclose($fd);
+
+ /* generate mpd.links */
+ $fd = fopen("{$g['varetc_path']}/mpd.links", "w");
+ if (!$fd) {
+ printf("Error: cannot open mpd.links in interfaces_wan_pppoe_configure().\n");
+ return 1;
+ }
+
+ $mpdconf = <<<EOD
+pppoe:
+ set link type pppoe
+ set pppoe iface {$wancfg['if']}
+ set pppoe service "{$pppoecfg['provider']}"
+ set pppoe enable originate
+ set pppoe disable incoming
+
+EOD;
+
+ fwrite($fd, $mpdconf);
+ fclose($fd);
+
+ /* fire up mpd */
+ mwexec("/usr/local/sbin/mpd -b -d {$g['varetc_path']} -p {$g['varrun_path']}/mpd.pid pppoe");
+
+ return 0;
+}
+
+function interfaces_wan_pptp_configure() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+ $pptpcfg = $config['pptp'];
+
+ /* generate mpd.conf */
+ $fd = fopen("{$g['varetc_path']}/mpd.conf", "w");
+ if (!$fd) {
+ printf("Error: cannot open mpd.conf in interfaces_wan_pptp_configure().\n");
+ return 1;
+ }
+
+ $idle = 0;
+
+ if (isset($pptpcfg['ondemand'])) {
+ $ondemand = "enable";
+ if ($pptpcfg['timeout'])
+ $idle = $pptpcfg['timeout'];
+ } else {
+ $ondemand = "disable";
+ }
+
+ $mpdconf = <<<EOD
+pptp:
+ new -i ng0 pptp pptp
+ set iface route default
+ set iface {$ondemand} on-demand
+ set iface idle {$idle}
+ set iface up-script /usr/local/sbin/ppp-linkup
+
+EOD;
+
+ if (isset($pptpcfg['ondemand'])) {
+ $mpdconf .= <<<EOD
+ set iface addrs {$pptpcfg['local']} {$pptpcfg['remote']}
+
+EOD;
+ }
+
+ $mpdconf .= <<<EOD
+ set bundle disable multilink
+ set bundle authname "{$pptpcfg['username']}"
+ set bundle password "{$pptpcfg['password']}"
+ set link keep-alive 10 60
+ set link max-redial 0
+ set link no acfcomp protocomp
+ set link disable pap chap
+ set link accept chap
+ set ipcp no vjcomp
+ set ipcp ranges 0.0.0.0/0 0.0.0.0/0
+ set ipcp enable req-pri-dns
+ set ipcp enable req-sec-dns
+ open
+
+EOD;
+
+ fwrite($fd, $mpdconf);
+ fclose($fd);
+
+ /* generate mpd.links */
+ $fd = fopen("{$g['varetc_path']}/mpd.links", "w");
+ if (!$fd) {
+ printf("Error: cannot open mpd.links in interfaces_wan_pptp_configure().\n");
+ return 1;
+ }
+
+ $mpdconf = <<<EOD
+pptp:
+ set link type pptp
+ set pptp enable originate outcall
+ set pptp disable windowing
+ set pptp self {$pptpcfg['local']}
+ set pptp peer {$pptpcfg['remote']}
+
+EOD;
+
+ fwrite($fd, $mpdconf);
+ fclose($fd);
+
+ /* configure interface */
+ mwexec("/sbin/ifconfig " . escapeshellarg($wancfg['if']) . " " .
+ escapeshellarg($pptpcfg['local'] . "/" . $pptpcfg['subnet']));
+
+ /* fire up mpd */
+ mwexec("/usr/local/sbin/mpd -b -d {$g['varetc_path']} -p {$g['varrun_path']}/mpd.pid pptp");
+
+ return 0;
+}
+
+function interfaces_wan_bigpond_configure($curwanip) {
+ global $config, $g;
+
+ $bpcfg = $config['bigpond'];
+
+ if (!$curwanip) {
+ /* IP address not configured yet, exit */
+ return 0;
+ }
+
+ /* kill bpalogin */
+ killbyname("bpalogin");
+
+ /* wait a moment */
+ sleep(1);
+
+ /* get the default domain */
+ $nfd = @fopen("{$g['varetc_path']}/defaultdomain.conf", "r");
+ if ($nfd) {
+ $defaultdomain = trim(fgets($nfd));
+ fclose($nfd);
+ }
+
+ /* generate bpalogin.conf */
+ $fd = fopen("{$g['varetc_path']}/bpalogin.conf", "w");
+ if (!$fd) {
+ printf("Error: cannot open bpalogin.conf in interfaces_wan_bigpond_configure().\n");
+ return 1;
+ }
+
+ if (!$bpcfg['authserver'])
+ $bpcfg['authserver'] = "dce-server";
+ if (!$bpcfg['authdomain'])
+ $bpcfg['authdomain'] = $defaultdomain;
+
+ $bpconf = <<<EOD
+username {$bpcfg['username']}
+password {$bpcfg['password']}
+authserver {$bpcfg['authserver']}
+authdomain {$bpcfg['authdomain']}
+localport 5050
+
+EOD;
+
+ if ($bpcfg['minheartbeatinterval'])
+ $bpconf .= "minheartbeatinterval {$bpcfg['minheartbeatinterval']}\n";
+
+ fwrite($fd, $bpconf);
+ fclose($fd);
+
+ /* fire up bpalogin */
+ mwexec("/usr/local/sbin/bpalogin -c {$g['varetc_path']}/bpalogin.conf");
+
+ return 0;
+}
+
+function get_real_wan_interface() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+
+ $wanif = $wancfg['if'];
+ if (($wancfg['ipaddr'] == "pppoe") || ($wancfg['ipaddr'] == "pptp")) {
+ $wanif = $g['pppoe_interface'];
+ }
+
+ return $wanif;
+}
+
+function get_current_wan_address() {
+ global $config, $g;
+
+ $wancfg = $config['interfaces']['wan'];
+
+ if (in_array($wancfg['ipaddr'], array('pppoe','dhcp','pptp','bigpond'))) {
+ /* dynamic WAN IP address, find out which one */
+ $wanif = get_real_wan_interface();
+
+ /* get interface info with netstat */
+ exec("/usr/bin/netstat -nWI " . escapeshellarg($wanif) . " -f inet", $ifinfo);
+
+ if (isset($ifinfo[1])) {
+ $aif = preg_split("/\s+/", $ifinfo[1]);
+ $curwanip = chop($aif[3]);
+
+ if ($curwanip && is_ipaddr($curwanip) && ($curwanip != "0.0.0.0"))
+ return $curwanip;
+ }
+
+ return null;
+ } else {
+ /* static WAN IP address */
+ return $wancfg['ipaddr'];
+ }
+}
+
+?>
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