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/* 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 GTPv2_Types all;
/* identifies a remote peer (sender or receiver) */
type record GtpPeer {
ConnectionId connId,
HostName remName,
IPL4asp_Types.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)" };
}
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