pfSense

function interfaces_bridge_configure() {

        global $config;

        $i = 0;

        if (is_array($config['bridges']['bridge']) && count($config['bridges']['bridge'])) {

                foreach ($config['bridges']['bridge'] as $bridge) {

                        if(empty($bridge['bridgeif'])) {

                                $bridge['bridgeif'] = "bridge{$i}";

                        }

                        /* XXX: Maybe we should report any errors?! */

                        interface_bridge_configure($bridge);

                        $i++;

                }

        }

}

function interface_bridge_configure(&$bridge) {

        global $config, $g;

        if (!is_array($bridge))

                return -1;

	$members = explode(',', $bridge['members']);

	if (!count(members))

		return -1;

	$checklist = get_configured_interface_list();

	$cmd = "";

	foreach ($members as $member) {

		if (!array_key_exists($member, $checklist))

			continue;

        	$realif = get_real_wan_interface($member);

		$realif =  escapeshellarg($realif);

        	/* make sure the parent interface is up */

        	mwexec("/sbin/ifconfig {$realif} up");

		$cmd .= " addm {$realif}";

	}

        if ($g['booting'] || $bridge['bridgeif'] <> "") {

                mwexec("/sbin/ifconfig {$bridge['bridgeif']} destroy");

                mwexec("/sbin/ifconfig {$bridge['bridgeif']} create");

                $bridgeif = $bridge['bridgeif'];

        } else

                $bridgeif = exec("/sbin/ifconfig bridge create");

	/* Add interfaces to bridge */

        mwexec("/sbin/ifconfig {$bridgeif} {$cmd}");

	if (isset($bridge['enablestp'])) {

		/* Choose spanning tree proto */

		mwexec("/sbin/ifconfig {$bridgeif} proto {$bridge['proto']}");	

		$stpifs = explode(',', $bridge['stp']);

		foreach ($stpifs as $stpif) {

			$realif = get_real_wan_interface($stpif);

			mwexec("/sbin/ifconfig {$bridgeif} stp {$realif}");

		}

		if ($bridge['maxage'] <> "")

			mwexec("/sbin/ifconfig {$bridgeif} maxage {$bridge['maxage']}");

		if ($brige['fwdelay'] <> "")

			mwexec("/sbin/ifconfig {$bridgeif} fwddelay {$bridge['fwdelay']}");

		if ($brige['hellotime'] <> "")

                        mwexec("/sbin/ifconfig {$bridgeif} hellotime {$bridge['hellotime']}");

		if ($brige['priority'] <> "")

                        mwexec("/sbin/ifconfig {$bridgeif} priority {$bridge['priority']}");

		if ($brige['holdcount'] <> "")

                        mwexec("/sbin/ifconfig {$bridgeif} holdcnt {$bridge['holdcnt']}");

		$pconfig = explode(",", $bridge['ifpriority']);

		$ifpriority = array();

		foreach ($pconfig as $cfg) {

			$embcfg = explode(":", $cfg);

			foreach ($embcfg as $key => $value)

				$ifpriority[$key] = $value;

		}

		foreach ($ifpriority as $key => $value) {

			$realif = get_real_wan_interface($key);

			mwexec("/sbin/ifconfig ${bridgeif} ifpriority {$realif} {$value}"); 

		}

		$pconfig = explode(",", $bridges['ifpathcost']);

		$ifpathcost = array();

		foreach ($pconfig as $cfg) {

			$embcfg = explode(":", $cfg);

			foreach ($embcfg as $key => $value)

				$ifpathcost[$key] = $value;

		}

		foreach ($ifpriority as $key => $value) {

                        $realif = get_real_wan_interface($key);

                        mwexec("/sbin/ifconfig ${bridgeif} ifpathcost {$realif} {$value}");

                }

	}

	if ($bridge['maxaddr'] <> "")

		mwexec("/sbin/ifconfig {$bridgeif} maxaddr {$bridge['maxaddr']}");

        if ($bridge['timeout'] <> "")

                mwexec("/sbin/ifconfig {$bridgeif} timeout {$bridge['timeout']}");

        if ($bridge['span'] <> "") {

		$realif = get_real_wan_interface($bridge['span']);

                mwexec("/sbin/ifconfig {$bridgeif} span {$realif}");

	}

        $edgeifs = explode(',', $bridge['edge']);

        foreach ($edgeifs as $edgeif) {

		$realif = get_real_wan_interface($edgeif);

                mwexec("/sbin/ifconfig {$bridgeif} edge {$realif}");

        }

        $edgeifs = explode(',', $bridge['autoedge']);

        foreach ($edgeifs as $edgeif) {

                $realif = get_real_wan_interface($edgeif);

                mwexec("/sbin/ifconfig {$bridgeif} -autoedge {$realif}");

        }

        $ptpifs = explode(',', $bridge['ptp']);

        foreach ($ptpifs as $ptpif) {

                $realif = get_real_wan_interface($ptpif);

                mwexec("/sbin/ifconfig {$bridgeif} ptp {$realif}");

        }

        $ptpifs = explode(',', $bridge['autoptp']);

        foreach ($ptpifs as $ptpif) {

                $realif = get_real_wan_interface($ptpif);

                mwexec("/sbin/ifconfig {$bridgeif} -autoptp {$realif}");

        }

        $stickyifs = explode(',', $bridge['static']);

        foreach ($stickyifs as $stickyif) {

                $realif = get_real_wan_interface($stickyif);

                mwexec("/sbin/ifconfig {$bridgeif} sticky {$realif}");

        }

        $privateifs = explode(',', $bridge['private']);

        foreach ($privateifs as $privateif) {

                $realif = get_real_wan_interface($privateif);

                mwexec("/sbin/ifconfig {$bridgeif} private {$realif}");

        }

        mwexec("/sbin/ifconfig {$bridgeif} up");

        return $bridgeif;

}