fix associations

kamailio/kamailio.cfg

@@ -446,7 +446,7 @@ route[FIND_ROUTES]
     }
 
     # Handle the case when a prefered route is set
-    $var(contact_uri) = @from.uri.user + "@" + @from.uri.host;
+    $var(contact_uri) = $(ct{tobody.user}) + "@" + $(ct{tobody.host});
     if ($sht(associations=>$var(contact_uri)) != $null) {
         $var(prefered_route) = $sht(associations=>$var(contact_uri));
 
@@ -712,7 +712,7 @@ failure_route[INTERNAL_FAULT]
 
 onsend_route {
     if (isflagset(FLAG_ASSOCIATE_USER)) {
-        $var(contact_uri) = @from.uri.user + "@" + @from.uri.host;
+        $var(contact_uri) = $(ct{tobody.user}) + "@" + $(ct{tobody.host});
         xlog("L_INFO", "$ci|log|associate user $var(contact_uri) with media server sip:$sndto(ip):$sndto(port)\n");
         $sht(associations=>$var(contact_uri))= "sip:" + $sndto(ip) + ":" + $sndto(port);
     }