t_relay_cancel() is added to the sample configuration

diff --git a/etc/ser.cfg b/etc/ser.cfg
index 6caf227..11a7304 100644 (file)
--- a/etc/ser.cfg
+++ b/etc/ser.cfg
@@ -154,6 +154,9 @@ route{
        # first do some initial sanity checks
        route(INIT);
 
+       # bypass the rest of the script for CANCELs if possible
+       route(CATCH_CANCEL);
+
        # check if the request is routed via Route header or
        # needs a Record-Route header
        route(RR);
@@ -497,6 +500,22 @@ route[PSTN]
        }
 }
 
+route[CATCH_CANCEL] {
+       # check whether there is a corresponding INVITE to the CANCEL,
+       # and bypass the rest of the script if possible
+
+       if (method == CANCEL) {
+               if (!t_relay_cancel()) { # implicit drop if the INVITE was found
+
+                       # INVITE was found but some error occurred
+                       sl_reply("500", "Internal Server Error");
+                       drop;
+               }
+               # bad luck, no corresponding INVITE was found,
+               # we have to continue with the script
+       }
+}
+
 failure_route[FAILURE_ROUTE]
 {
        # mark for the other routes that we are operating from here on from a