mme: Add GTPv2 support
this includes a GTPv2_CodecPort (for the usual transcoding)
as wella as an empty GTPv2_PrivateExtensions.ttcn without which
the TITAN GTPv2 ProtocolModule won't compile.
Change-Id: I1c1b8409077103dd4e64e467d21d33d8c9c4ac95
diff --git a/library/GTPv2_CodecPort.ttcn b/library/GTPv2_CodecPort.ttcn
new file mode 100644
index 0000000..1f08f19
--- /dev/null
+++ b/library/GTPv2_CodecPort.ttcn
@@ -0,0 +1,57 @@
+/* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTPv2C
+ * (C) 2019 Harald Welte <laforge@gnumonks.org>
+ * All rights reserved.
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+
+module GTPv2_CodecPort {
+ import from IPL4asp_PortType all;
+ import from IPL4asp_Types all;
+ import from GTPv2C_Types all;
+
+ /* identifies a remote peer (sender or receiver) */
+ type record GtpPeer {
+ ConnectionId connId,
+ HostName remName,
+ PortNumber remPort
+ }
+
+ /* Decoded GTP2C (Control Plane), used in send and receive direction */
+ type record Gtp2cUnitdata {
+ GtpPeer peer,
+ PDU_GTPCv2 gtpc
+ }
+
+ /* Translation port on top of IPL4asp; ASP_Event passed through transparently */
+ type port GTPv2C_PT message {
+ out Gtp2cUnitdata;
+ in Gtp2cUnitdata,
+ ASP_ConnId_ReadyToRelease,
+ ASP_Event;
+ } with { extension "user IPL4asp_PT
+ out(Gtp2cUnitdata -> ASP_SendTo: function(f_enc_Gtp2cUD))
+ in(ASP_RecvFrom -> Gtp2cUnitdata: function(f_dec_Gtp2cUD);
+ ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple;
+ ASP_Event -> ASP_Event: simple)" }
+
+ private function f_enc_Gtp2cUD(in Gtp2cUnitdata in_ud, out ASP_SendTo out_ud) {
+ out_ud.connId := in_ud.peer.connId;
+ out_ud.remName := in_ud.peer.remName;
+ out_ud.remPort := in_ud.peer.remPort;
+ out_ud.proto := { udp := {} };
+ out_ud.msg := enc_PDU_GTPCv2(in_ud.gtpc);
+ } with { extension "prototype(fast)" };
+
+ private function f_dec_Gtp2cUD(in ASP_RecvFrom in_ud, out Gtp2cUnitdata out_ud) {
+ out_ud.peer.connId := in_ud.connId;
+ out_ud.peer.remName := in_ud.remName;
+ out_ud.peer.remPort := in_ud.remPort;
+ out_ud.gtpc := dec_PDU_GTPCv2(in_ud.msg);
+ } with { extension "prototype(fast)" };
+
+}