| /* dual-faced port sitting on top of IPL4_asp UDP to encode/decode GTP */ |
| /* (C) 2017 by Harald Welte <laforge@gnumonks.org */ |
| module GTP_CodecPort { |
| import from IPL4asp_PortType all; |
| import from IPL4asp_Types all; |
| import from GTPC_Types all; |
| import from GTPU_Types all; |
| |
| /* identifies a remote peer (sender or receiver) */ |
| type record GtpPeer { |
| ConnectionId connId, |
| HostName remName, |
| PortNumber remPort |
| } |
| |
| /* Decoded GTP1C (Control Plane), used in send and receive direction */ |
| type record Gtp1cUnitdata { |
| GtpPeer peer, |
| PDU_GTPC gtpc |
| } |
| |
| /* Decoded GTP1U (User Plane), used in send and receive direction */ |
| type record Gtp1uUnitdata { |
| GtpPeer peer, |
| PDU_GTPU gtpu |
| } |
| |
| /* Translation port on top of IPL4asp; ASP_Event passed through transparently */ |
| type port GTPC_PT message { |
| out Gtp1cUnitdata; |
| in Gtp1cUnitdata, |
| ASP_ConnId_ReadyToRelease, |
| ASP_Event; |
| } with { extension "user IPL4asp_PT |
| out(Gtp1cUnitdata -> ASP_SendTo: function(f_enc_Gtp1cUD)) |
| in(ASP_RecvFrom -> Gtp1cUnitdata: function(f_dec_Gtp1cUD); |
| ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple; |
| ASP_Event -> ASP_Event: simple)" } |
| |
| private function f_enc_Gtp1cUD(in Gtp1cUnitdata 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_GTPC(in_ud.gtpc); |
| } with { extension "prototype(fast)" }; |
| |
| private function f_dec_Gtp1cUD(in ASP_RecvFrom in_ud, out Gtp1cUnitdata 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_GTPC(in_ud.msg); |
| } with { extension "prototype(fast)" }; |
| |
| |
| /* dual-faced port on top of IPL4asp; ASP_Event passed through transparently */ |
| type port GTPU_PT message { |
| out Gtp1uUnitdata; |
| in Gtp1uUnitdata, |
| ASP_ConnId_ReadyToRelease, |
| ASP_Event; |
| } with { extension "user IPL4asp_PT |
| out(Gtp1uUnitdata -> ASP_SendTo: function(f_enc_Gtp1uUD)) |
| in(ASP_RecvFrom -> Gtp1uUnitdata: function(f_dec_Gtp1uUD); |
| ASP_ConnId_ReadyToRelease -> ASP_ConnId_ReadyToRelease: simple; |
| ASP_Event -> ASP_Event: simple)" } |
| |
| function f_enc_Gtp1uUD(in Gtp1uUnitdata 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_GTPU(in_ud.gtpu); |
| } with { extension "prototype(fast)" }; |
| |
| function f_dec_Gtp1uUD(in ASP_RecvFrom in_ud, out Gtp1uUnitdata 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.gtpu := dec_PDU_GTPU(in_ud.msg); |
| } with { extension "prototype(fast)" }; |
| |
| } |