| /* Translation 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 map to IPL4asp_PT { |
| out Gtp1cUnitdata to ASP_SendTo with f_enc_Gtp1cUD(); |
| in Gtp1cUnitdata from ASP_RecvFrom with f_dec_Gtp1cUD(), |
| ASP_Event; |
| /* we can declare variables here and use them from all functions with "port" label */ |
| } |
| |
| function f_enc_Gtp1cUD(in Gtp1cUnitdata in_ud, out ASP_SendTo out_ud) port GTPC_PT { |
| 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); |
| port.setstate(0); |
| } with { extension "prototype(fast)" }; |
| |
| function f_dec_Gtp1cUD(in ASP_RecvFrom in_ud, out Gtp1cUnitdata out_ud) port GTPC_PT { |
| 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); |
| port.setstate(0); |
| } with { extension "prototype(fast)" }; |
| |
| |
| /* Translation port on top of IPL4asp; ASP_Event passed through transparently */ |
| type port GTPU_PT message map to IPL4asp_PT { |
| out Gtp1uUnitdata to ASP_SendTo with f_enc_Gtp1uUD(); |
| in Gtp1uUnitdata from ASP_RecvFrom with f_dec_Gtp1uUD(), |
| ASP_Event; |
| /* we can declare variables here and use them from all functions with "port" label */ |
| } |
| |
| function f_enc_Gtp1uUD(in Gtp1uUnitdata in_ud, out ASP_SendTo out_ud) port GTPU_PT { |
| 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); |
| port.setstate(0); |
| } with { extension "prototype(fast)" }; |
| |
| function f_dec_Gtp1uUD(in ASP_RecvFrom in_ud, out Gtp1uUnitdata out_ud) port GTPU_PT { |
| 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); |
| port.setstate(0); |
| } with { extension "prototype(fast)" }; |
| /* |
| function f_GTPC_listen(inout GTPC_PT portRef, in HostName locName, |
| in PortNumber locPort) return Result { |
| return f_IPL4_listen(portRef, locName, locPort, { udp := {} }); |
| } |
| */ |
| } |