58 lines
1.8 KiB
Plaintext
58 lines
1.8 KiB
Plaintext
/* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTPv2C
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* (C) 2019 Harald Welte <laforge@gnumonks.org>
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* All rights reserved.
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*
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* Released under the terms of GNU General Public License, Version 2 or
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* (at your option) any later version.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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module GTPv2_CodecPort {
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import from IPL4asp_PortType all;
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import from IPL4asp_Types all;
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import from GTPv2_Types all;
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/* identifies a remote peer (sender or receiver) */
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type record GtpPeer {
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ConnectionId connId,
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HostName remName,
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IPL4asp_Types.PortNumber remPort
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}
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/* Decoded GTP2C (Control Plane), used in send and receive direction */
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type record Gtp2cUnitdata {
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GtpPeer peer,
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PDU_GTPCv2 gtpc
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}
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/* Translation port on top of IPL4asp; ASP_Event passed through transparently */
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type port GTPv2C_PT message {
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out Gtp2cUnitdata;
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in Gtp2cUnitdata,
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ASP_ConnId_ReadyToRelease,
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ASP_Event;
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} with { extension "user IPL4asp_PT
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out(Gtp2cUnitdata -> ASP_SendTo: function(f_enc_Gtp2cUD))
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in(ASP_RecvFrom -> Gtp2cUnitdata: function(f_dec_Gtp2cUD);
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ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple;
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ASP_Event -> ASP_Event: simple)" }
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private function f_enc_Gtp2cUD(in Gtp2cUnitdata in_ud, out ASP_SendTo out_ud) {
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out_ud.connId := in_ud.peer.connId;
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out_ud.remName := in_ud.peer.remName;
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out_ud.remPort := in_ud.peer.remPort;
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out_ud.proto := { udp := {} };
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out_ud.msg := enc_PDU_GTPCv2(in_ud.gtpc);
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} with { extension "prototype(fast)" };
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private function f_dec_Gtp2cUD(in ASP_RecvFrom in_ud, out Gtp2cUnitdata out_ud) {
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out_ud.peer.connId := in_ud.connId;
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out_ud.peer.remName := in_ud.remName;
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out_ud.peer.remPort := in_ud.remPort;
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out_ud.gtpc := dec_PDU_GTPCv2(in_ud.msg);
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} with { extension "prototype(fast)" };
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}
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