inc/ipsec: proper softcoding for tmp_path

This allows us to grep for the file name as "name.something.xml"
and still be able to find the variable or path or binary or so,
while the actual file name is only set once avoiding typos in the
process as well...

src/etc/inc/ipsec.inc

 <?php
+
 /*
-	ipsec.inc
 	Copyright (C) 2007 Scott Ullrich
 	Copyright (C) 2008 Shrew Soft Inc
-	All rights reserved.
-
-	Parts of this code was originally based on vpn_ipsec_sad.php
 	Copyright (C) 2003-2004 Manuel Kasper
+	All rights reserved.
 
 	Redistribution and use in source and binary forms, with or without
 	modification, are permitted provided that the following conditions are met:
@@ -28,10 +26,6 @@
 	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.
-
-	pfSense_BUILDER_BINARIES:	/sbin/setkey
-	pfSense_MODULE:	ipsec
-
 */
 
 /* IPsec defines */
@@ -483,12 +477,13 @@ function ipsec_smp_dump_status() {
 	}
 	fclose($fd);
 
-	@file_put_contents("{$g['tmp_path']}/smp_status.xml", $response);
+	$smp_status_xml = '/tmp/smp_status.xml';
+	@file_put_contents($smp_status_xml, $response);
 	unset($response, $sread);
 
 	$custom_listtags = array('ikesa', 'childsa', 'network', 'auth');
-	$response = parse_xml_config("{$g['tmp_path']}/smp_status.xml", "message");
-	@unlink("{$g['tmp_path']}/smp_status.xml");
+	$response = parse_xml_config($smp_status_xml, 'message');
+	@unlink($smp_status_xml);
 	unset($custom_listtags);
 
 	return $response;
@@ -601,19 +596,22 @@ function ipsec_dump_sad()
 /*
  * Return dump of mobile user list
  */
-function ipsec_dump_mobile() {
+function ipsec_dump_mobile()
+{
 	global $g, $custom_listtags;
 
-	$_gb = exec("/usr/local/sbin/ipsec stroke leases > {$g['tmp_path']}/strongswan_leases.xml");
+	$strongswan_leases_xml = '/tmp/strongswan_leases.xml';
+
+	$_gb = exec(sprintf('/usr/local/sbin/ipsec stroke leases > %s', $strongswan_leases_xml));
 
-	if (!file_exists("{$g['tmp_path']}/strongswan_leases.xml")) {
+	if (!file_exists($strongswan_leases_xml)) {
 		log_error(gettext("IPsec daemon seems to have issues or not running! Could not display mobile user stats!"));
 		return array();
 	}
 
 	$custom_listtags = array('lease', 'pool');
-	$response = parse_xml_config("{$g['tmp_path']}/strongswan_leases.xml", "leases");
-	@unlink("{$g['tmp_path']}/strongswan_leases.xml");
+	$response = parse_xml_config($strongswan_leases_xml, 'leases');
+	@unlink($strongswan_leases_xml);
 	unset($custom_listtags, $_gb);
 
 	return $response;