Add Osmux support and tests for MGW
Depends: osmo-mgw.git Iac073f1db46569b46eddeaecc9934a2986bd50f1
Change-Id: Ibb58b2a4e08d6f30cfe347c217794d0d1310954f
diff --git a/library/OSMUX_Types.ttcn b/library/OSMUX_Types.ttcn
new file mode 100644
index 0000000..091b4d7
--- /dev/null
+++ b/library/OSMUX_Types.ttcn
@@ -0,0 +1,110 @@
+/*
+ * (C) 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
+ * All rights reserved.
+ *
+ * Author: Pau Espin Pedrol <pespin@sysmocom.de>
+ *
+ * Released under the terms of GNU General Public License, Version 2 or
+ * (at your option) any later version.
+ */
+
+module OSMUX_Types {
+
+import from General_Types all;
+
+external function enc_OSMUX_PDU ( in OSMUX_PDU msg ) return octetstring
+ with { extension "prototype(convert) encode(RAW)" };
+external function dec_OSMUX_PDU ( in octetstring msg ) return OSMUX_PDU
+ with { extension "prototype(convert) decode(RAW)" };
+
+type INT1 OsmuxCID (0 .. 255);
+
+type enumerated OsmuxFT {
+ OSMUX_FT_LAPD,
+ OSMUX_FT_AMR,
+ OSMUX_FT_DUMMY
+};
+
+type record Osmux_AMR_header {
+ BIT1 marker,
+ INT2b ft,
+ INT3b ctr,
+ BIT1 amr_f,
+ BIT1 amr_q,
+ INT1 seq,
+ OsmuxCID cid,
+ INT4b amr_ft,
+ INT4b amr_cmr
+} with {
+ variant "FIELDORDER(msb)"
+}
+
+type record PDU_Osmux_AMR {
+ Osmux_AMR_header header,
+ octetstring data
+} with {
+ variant "FIELDORDER(msb)"
+};
+
+type record PDU_Osmux_DUMMY {
+ Osmux_AMR_header header,
+ octetstring data
+} with {
+ variant "FIELDORDER(msb)"
+};
+
+type record Osmux_session_par {
+ integer id optional,
+ charstring local_address optional,
+ integer local_port optional,
+ charstring dest_address optional,
+ integer dest_port optional
+}
+
+type record ASP_Osmux_Open_session {
+ Osmux_session_par session_id
+}
+
+type record ASP_Osmux_Open_session_result {
+ Osmux_session_par session_id
+}
+
+type record ASP_Osmux_Close_session {
+ Osmux_session_par session_id
+}
+
+type union OSMUX_PDU {
+ PDU_Osmux_AMR osmux_amr,
+ PDU_Osmux_DUMMY osmux_dummy
+} with {
+ variant "TAG (
+ osmux_amr, header.ft = 1;
+ osmux_dummy, header.ft = 2;
+ )"
+};
+
+
+/* AMR voice frame type identifiers
+ * See also 3GPP TS 26.101, Table 1a: Interpretation of Frame Type, Mode
+ * Indication and Mode Request fields */
+type enumerated AMRFT {
+ AMR_FT_0, /* 4.75 */
+ AMR_FT_1, /* 5.15 */
+ AMR_FT_2, /* 5.90 */
+ AMR_FT_3, /* 6.70 */
+ AMR_FT_4, /* 7.40 */
+ AMR_FT_5, /* 7.95 */
+ AMR_FT_6, /* 10.2 */
+ AMR_FT_7, /* 12.2 */
+ AMR_FT_SID /* SID */
+};
+
+/* AMR voice frame length (in bytes, rounded),
+ * See also RFC 3267, chapter 3.6 */
+const integer c_AMRFT_len[9] := {12, 13, 15, 17, 19, 20, 26, 31, 5};
+
+function f_amrft_payload_len(INT4b amr_ft) return integer {
+ return c_AMRFT_len[amr_ft];
+}
+
+} with { encode "RAW"}