@@ -76,7 +76,8 @@ loadmodule "/usr/local/lib/ser/modules/xmlrpc.so"

 # ----------------- setting script FLAGS -----------------------------

 flags

-  FLAG_ACC         : 1  # include message in accouting

+  FLAG_ACC          : 1,  # include message in accouting

+  FLAG_FAILUREROUTE : 2;  # we are operating from a failure route

 avpflags

   dialog_cookie;        # handled by rr module

@@ -136,6 +137,11 @@ modparam("acc_db", "log_flag", "FLAG_ACC")

 # restarts the resend timer (see INBOUND route below)

 #modparam("tm", "restart_fr_on_each_reply", "0")

+# -- xmlrpc params --

+# using a sub-route from the module is a lot safer then relying on the

+# request method to distinguish HTTP from SIP

+modparam("xmlrpc", "route", "RPC");

+

 # -------------------------  request routing logic -------------------

 # main routing logic

@@ -167,7 +173,7 @@ route{

 	# check if the request is for a local user

 	route(INBOUND);

-	# here you coud for example try to an ENUM lookup before

+	# here you could for example try to do an ENUM lookup before

 	# the call gets routed to the PSTN

 	#route(ENUM);

@@ -182,6 +188,17 @@ route[FORWARD]

 {

 	# here you could decide wether this call needs a RTP relay or not

+	# if this is called from the failure route we need to open a new branch

+	if (isflagset(FLAG_FAILUREROUTE)) {

+		append_branch();

+	}

+

+	# if this is an initial INVITE (without a To-tag) we might try another

+	# (forwarding or voicemail) target after receiving an error

+	if (method=="INVITE" && @to.tag=="") {

+		t_on_failure("FAILURE_ROUTE");

+	}

+

 	# send it out now; use stateful forwarding as it works reliably

 	# even for UDP2TCP

 	if (!t_relay()) {

@@ -192,10 +209,6 @@ route[FORWARD]

 route[INIT]

 {

-	# as soon as it is save to distinguish HTTP from SIP

-	# we can un-comment the next line

-	route(RPC);

-

 	# initial sanity checks -- messages with

 	# max_forwards==0, or excessively long requests

 	if (!mf_process_maxfwd_header("10")) {

@@ -212,8 +225,8 @@ route[INIT]

 	# or you cuold call here some of the check from the sanity module

-	# lets account all initial INVITEs and the BYEs

-	# if (method=="INVITE" && @to.tag=="" || method=="BYE") {

+	# lets account all initial INVITEs

+	# further in-dialog requests are accounted by a RR cookie (see below)

 	if (method=="INVITE" && @to.tag=="") {

 		setflag(FLAG_ACC);

 	}

@@ -230,7 +243,7 @@ route[RPC]

 			drop;

 		}

-		# lets see if a module want to answer this

+		# lets see if a module wants to answer this

 		dispatch_rpc();

 		drop;

 	}

@@ -426,6 +439,14 @@ route[INBOUND]

 			#load_attrs("$tr", "@ruri");

 		#}

+		# check for call forwarding of the callee

+		# Note: the forwarding target has to be full routable URI

+		#       in this example

+		if ($tu.fwd_always_target) {

+			attr2uri("$tu.fwd_always_target");

+			route(FORWARD);

+		}

+

 		# native SIP destinations are handled using our USRLOC DB

 		if (lookup_contacts("location")) {

 			append_hf("P-hint: usrloc applied\r\n");

@@ -434,7 +455,7 @@ route[INBOUND]

 			# of the callee (avoid too long ringing of his phones)

 			# Note1: timer values have to be in ms now!

 			# Note2: this makes even more sense if you switch to a voicemail

-			#        in a FAILURE route

+			#        from the FAILURE_ROUTE below

 			if ($t.fr_inv_timer) {

 				if ($t.fr_timer) {

 					t_set_fr("$t.fr_inv_timer", "$t.fr_timer");

@@ -475,3 +496,30 @@ route[PSTN]

 		route(FORWARD);

 	}

 }

+

+failure_route[FAILURE_ROUTE]

+{

+	# mark for the other routes that we are operating from here on from a

+	# failure route

+	setflag(FLAG_FAILUREROUTE);

+

+	if (t_check_status("486|600")) {

+		# if we received a busy and a busy target is set, forward it there

+		# Note: again the forwarding target has to be a routeable URI

+		if ($tu.fwd_busy_target) {

+			attr2uri("$tu.fwd_busy_target");

+			route(FORWARD);

+		}

+		# alternatively you could forward the request to SEMS/voicemail here

+	}

+	else if (t_check_status("408|480")) {

+		# if we received no answer and the noanswer target is set,

+		# forward it there

+		# Note: again the target has to be a routeable URI

+		if ($tu.fwd_noanswer_target) {

+			attr2uri("$tu.fwd_noanswer_target");

+			route(FORWARD);

+		}

+		# alternatively you could forward the request to SEMS/voicemail here

+	}

+}