lib/RAN: Introduce CTRL_CLIENT port to access CTRL muxed in RAN IPA conn
This is the case for SCCPlite between BSC and MSC (or BSC-NAT). MGCP and
CTRL can be multiplexed over the same underlaying IPA conn.
Related: OS#2012
Change-Id: Id90c1609f0439b00379166fb9e4028d181fc023e
diff --git a/library/RAN_Adapter.ttcnpp b/library/RAN_Adapter.ttcnpp
index 862921e..40cf0fa 100644
--- a/library/RAN_Adapter.ttcnpp
+++ b/library/RAN_Adapter.ttcnpp
@@ -167,6 +167,11 @@
log("Connecting MGCP RAN Emulation to IPA MGCP PORT");
connect(ba.vc_IPA:IPA_MGCP_PORT, ba.vc_RAN:MGCP);
#endif
+#ifdef IPA_EMULATION_CTRL
+ /* connect IPA CTRL port with BSSMAP CTRL port */
+ log("Connecting CTRL RAN Emulation to IPA CTRL PORT");
+ connect(ba.vc_IPA:IPA_CTRL_PORT, ba.vc_RAN:CTRL);
+#endif
}
log("Starting RAN_Emulation");
ba.vc_RAN.start(RAN_Emulation.main(valueof(ops), ""));
diff --git a/library/RAN_Emulation.ttcnpp b/library/RAN_Emulation.ttcnpp
index ba018b4..cd0c867 100644
--- a/library/RAN_Emulation.ttcnpp
+++ b/library/RAN_Emulation.ttcnpp
@@ -36,6 +36,7 @@
import from SCCPasp_Types all;
import from IPA_Emulation all;
import from MobileL3_Types all;
+import from Misc_Helpers all;
#ifdef RAN_EMULATION_BSSAP
import from BSSAP_Types all;
@@ -48,6 +49,11 @@
import from MGCP_Templates all;
#endif
+#ifdef RAN_EMULATION_CTRL
+import from Osmocom_CTRL_Types all;
+import from Osmocom_CTRL_Adapter all;
+#endif
+
#ifdef RAN_EMULATION_RANAP
import from RANAP_CodecPort all;
import from RANAP_PDU_Descriptions all;
@@ -177,6 +183,11 @@
/* MGCP port */
port IPA_MGCP_PT MGCP;
#endif
+#ifdef RAN_EMULATION_CTRL
+ /* CTRL port */
+ port IPA_CTRL_PT CTRL;
+ port IPA_CTRL_PT CTRL_CLIENT;
+#endif
/* use 16 as this is also the number of SCCP connections that SCCP_Emulation can handle */
var ConnectionData ConnectionTable[16];
@@ -1041,6 +1052,37 @@
#endif
}
+private altstep as_main_ctrl() runs on RAN_Emulation_CT {
+#ifdef RAN_EMULATION_CTRL
+ var CtrlMessage ctrl;
+ var RAN_ConnHdlr vc_conn;
+ var ASP_IPA_Event evt;
+
+ /* Handling of CTRL in IPA SCCPLite case. This predates 3GPP AoIP
+ * and uses a CTRL session in parallel to BSSAP. */
+
+ /* CTRL_CLIENT -> CTRL */
+ [] CTRL_CLIENT.receive(CtrlMessage:?) -> value ctrl sender vc_conn {
+ CTRL.send(ctrl);
+ }
+
+ /* CTRL -> CTRL_CLIENT */
+ [] CTRL.receive(CtrlMessage:?) -> value ctrl {
+ CTRL_CLIENT.send(ctrl);
+ }
+
+ [] CTRL.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_UP}) -> value evt {
+ CTRL_CLIENT.send(evt);
+ }
+ [] CTRL.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_DOWN}) {
+ Misc_Helpers.f_shutdown(__BFILE__, __LINE__, fail, "Lost IPA connection!");
+ }
+ [] CTRL.receive(ASP_IPA_Event:{up_down := ASP_IPA_EVENT_ID_ACK}) {}
+#else
+ [false] CLIENT.receive {}
+#endif
+}
+
/* send a raw (encoded) L3 message over given SCCP connection */
private function f_xmit_raw_l3(integer sccp_conn_id, OCT1 dlci, octetstring l3_enc) runs on RAN_Emulation_CT
{
@@ -1123,6 +1165,7 @@
}
[] as_main_mgcp();
+ [] as_main_ctrl();
[] PROC.getcall(RAN_register:{?,?}) -> param(l3_info, vc_hdlr) {
f_create_expect(l3_info, vc_hdlr);