| module IPA_Emulation { |
| |
| import from IPA_Types all; |
| import from IPA_CodecPort all; |
| import from IPA_CodecPort_CtrlFunct all; |
| import from IPL4asp_Types all; |
| import from MTP3asp_Types all; |
| import from MTP3asp_PortType all; |
| |
| import from MGCP_Types all; |
| |
| /* |
| modulepar { |
| } |
| */ |
| |
| type enumerated IpaMode { |
| IPA_MODE_CLIENT, |
| IPA_MODE_SERVER |
| } |
| |
| type record ASP_IPA_Unitdata { |
| IpaStreamId streamId, |
| IpaExtStreamId streamIdExt optional, |
| octetstring payload |
| } |
| |
| type port IPA_SP_PT message { |
| inout ASP_IPA_Unitdata; |
| } with { extension "internal" } |
| |
| type port IPA_MGCP_PT message { |
| inout MgcpCommand, MgcpResponse; |
| } with { extension "internal" } |
| |
| type component IPA_Emulation_CT { |
| /* down-facing port to IPA codec port */ |
| port IPA_CODEC_PT IPA_PORT; |
| /* up-facing port to SCCP */ |
| port MTP3asp_SP_PT MTP3_SP_PORT; |
| /* up-facing port for MGCP */ |
| port IPA_MGCP_PT IPA_MGCP_PORT; |
| /* up-facing port for other streams */ |
| port IPA_SP_PT IPA_SP_PORT; |
| |
| var boolean g_initialized := false; |
| var ConnectionId g_ipa_conn_id := -1; |
| /* Are we a BSC/MGW (truel) or MSC (false) */ |
| var boolean g_is_bsc_mgw; |
| |
| var IpaMode g_mode; |
| } |
| |
| function f_connect(charstring remote_host, PortNumber remote_port, |
| charstring local_host, PortNumber local_port) runs on IPA_Emulation_CT { |
| var Result res; |
| res := IPA_CodecPort_CtrlFunct.f_IPL4_connect(IPA_PORT, remote_host, remote_port, |
| local_host, local_port, 0, { tcp:={} }); |
| g_ipa_conn_id := res.connId; |
| g_is_bsc_mgw := true; |
| } |
| |
| function f_bind(charstring local_host, PortNumber local_port) runs on IPA_Emulation_CT { |
| var Result res; |
| res := IPA_CodecPort_CtrlFunct.f_IPL4_listen(IPA_PORT, |
| local_host, local_port, { tcp:={} }); |
| g_ipa_conn_id := res.connId; |
| g_is_bsc_mgw := false; |
| } |
| |
| template ASP_MTP3_TRANSFERind ts_MTP3_XFER_ind(integer opc, octetstring data) := { |
| sio := { '10'B, '00'B, '0011'B }, |
| opc := opc, |
| dpc := 0, |
| sls := 0, |
| data := data |
| } |
| |
| |
| private template IpaCcmRespPart t_IdRespPart(IpaCcmIdTag tag, charstring payload) := { |
| len := 0, /* overwritten by codec */ |
| tag := tag, |
| data := payload |
| } |
| |
| /* build IPA CCM ID RESP response from IPA CCM GET */ |
| private function f_ccm_make_id_resp(PDU_IPA_CCM get) return PDU_IPA_CCM { |
| var integer i; |
| var PDU_IPA_CCM resp := { |
| msg_type := IPAC_MSGT_ID_RESP, |
| u := { |
| resp := {} |
| } |
| } |
| |
| for (i := 0; i < sizeof(get.u.get); i := i + 1) { |
| var IpaCcmIdTag tag := get.u.get[i].tag; |
| var charstring foo; |
| select (tag) { |
| case (IPAC_IDTAG_UNIT) { |
| foo := "0/1/2"; |
| } |
| case (IPAC_IDTAG_UNITNAME) { |
| foo := "mahlzeit"; |
| } |
| case else { |
| foo := "foo"; |
| } |
| } |
| resp.u.resp[sizeof(resp.u.resp)] := valueof(t_IdRespPart(tag, foo)); |
| } |
| |
| return resp; |
| } |
| |
| /* transmit IPA CCM message */ |
| private function f_ccm_tx(PDU_IPA_CCM ccm) runs on IPA_Emulation_CT { |
| var IPA_Send ipa_tx := valueof(t_IPA_Send(g_ipa_conn_id, IPAC_PROTO_CCM, enc_PDU_IPA_CCM(ccm))); |
| log("CCM Tx:", ccm); |
| IPA_PORT.send(ipa_tx); |
| } |
| |
| template PDU_IPA_CCM ts_IPA_PONG := { |
| msg_type := IPAC_MSGT_PONG, |
| u := omit |
| } |
| |
| template PDU_IPA_CCM ts_IPA_ACK := { |
| msg_type := IPAC_MSGT_ID_ACK, |
| u := omit |
| } |
| |
| template PDU_IPA_CCM ts_IPA_ID_GET := { |
| msg_type := IPAC_MSGT_ID_GET, |
| u := { |
| get := { |
| { 1, IPAC_IDTAG_UNITNAME } |
| } |
| } |
| } |
| |
| /* receive IPA CCM message */ |
| private function f_ccm_rx(PDU_IPA_CCM ccm) runs on IPA_Emulation_CT { |
| select (ccm.msg_type) { |
| case (IPAC_MSGT_PING) { |
| f_ccm_tx(valueof(ts_IPA_PONG)); |
| } |
| case (IPAC_MSGT_ID_ACK) { |
| f_ccm_tx(valueof(ts_IPA_ACK)); |
| } |
| case (IPAC_MSGT_ID_GET) { |
| f_ccm_tx(f_ccm_make_id_resp(ccm)); |
| } |
| case else { |
| log("Unknown/unsupported IPA CCM message type", ccm); |
| } |
| } |
| } |
| |
| private function f_to_asp(IPA_RecvFrom ipa_rx) return ASP_IPA_Unitdata { |
| var ASP_IPA_Unitdata ret := { |
| streamId := ipa_rx.streamId, |
| streamIdExt := ipa_rx.streamIdExt, |
| payload := ipa_rx.msg |
| } |
| return ret; |
| } |
| |
| private function f_from_asp(ConnectionId connId, ASP_IPA_Unitdata ipa_tx) return IPA_Send { |
| var IPA_Send ret := valueof(t_IPA_Send(connId, ipa_tx.streamId, ipa_tx.payload, |
| ipa_tx.streamIdExt)); |
| return ret; |
| } |
| |
| function main_client(charstring remote_host, PortNumber remote_port, |
| charstring local_host, PortNumber local_port) runs on IPA_Emulation_CT { |
| g_mode := IPA_MODE_CLIENT; |
| f_connect(remote_host, remote_port, local_host, local_port); |
| ScanEvents(); |
| } |
| |
| function main_server(charstring local_host, PortNumber local_port) runs on IPA_Emulation_CT { |
| g_mode := IPA_MODE_SERVER; |
| f_bind(local_host, local_port); |
| ScanEvents(); |
| } |
| |
| private function f_mgcp_to_user(octetstring msg) runs on IPA_Emulation_CT { |
| var charstring msg_ch := oct2char(msg); |
| if (g_is_bsc_mgw) { |
| log("============"); |
| log(msg_ch); |
| IPA_MGCP_PORT.send(dec_MgcpCommand(msg_ch)); |
| } else { |
| IPA_MGCP_PORT.send(dec_MgcpResponse(msg_ch)); |
| } |
| } |
| |
| private function ScanEvents() runs on IPA_Emulation_CT { |
| var IPA_RecvFrom ipa_rx; |
| var ASP_IPA_Unitdata ipa_ud; |
| var ASP_MTP3_TRANSFERreq mtp_req; |
| var ASP_Event asp_evt; |
| var MgcpCommand mgcp_cmd; |
| var MgcpResponse mgcp_rsp; |
| |
| while (true) { |
| alt { |
| /* Received IPA -> up into SCCP stack */ |
| [] IPA_PORT.receive(IPA_RecvFrom: ?) -> value ipa_rx { |
| select (ipa_rx.streamId) { |
| case (IPAC_PROTO_CCM) { |
| var PDU_IPA_CCM ccm := dec_PDU_IPA_CCM(ipa_rx.msg); |
| log("CCM Rx:", ccm); |
| f_ccm_rx(ccm); |
| } case (IPAC_PROTO_SCCP) { |
| var ASP_MTP3_TRANSFERind mtp; |
| mtp := valueof(ts_MTP3_XFER_ind(0, ipa_rx.msg)); |
| MTP3_SP_PORT.send(mtp); |
| } case (IPAC_PROTO_MGCP_OLD) { |
| f_mgcp_to_user(ipa_rx.msg); |
| } case (IPAC_PROTO_OSMO) { |
| select (ipa_rx.streamIdExt) { |
| case (IPAC_PROTO_EXT_MGCP) { |
| f_mgcp_to_user(ipa_rx.msg); |
| } case else { |
| IPA_SP_PORT.send(f_to_asp(ipa_rx)); |
| } |
| } |
| } case else { |
| IPA_SP_PORT.send(f_to_asp(ipa_rx)); |
| } |
| } |
| } |
| |
| /* server only */ |
| [] IPA_PORT.receive(ASP_Event:{connOpened:=?}) -> value asp_evt { |
| log("IPA: Connected"); |
| g_ipa_conn_id := asp_evt.connOpened.connId; |
| if (g_mode == IPA_MODE_SERVER) { |
| f_ccm_tx(valueof(ts_IPA_ID_GET)); |
| } |
| } |
| |
| [] IPA_PORT.receive(ASP_Event:{connClosed:=?}) -> value asp_evt { |
| log("IPA: Closed"); |
| g_ipa_conn_id := -1; |
| self.stop; |
| } |
| |
| /* Received SCCP -> down into IPA */ |
| [] MTP3_SP_PORT.receive(ASP_MTP3_TRANSFERreq: ?) -> value mtp_req { |
| var IPA_Send ipa_tx := valueof(t_IPA_Send(g_ipa_conn_id, IPAC_PROTO_SCCP, |
| mtp_req.data)); |
| IPA_PORT.send(ipa_tx); |
| } |
| |
| /* Received MGCP -> down into IPA */ |
| [] IPA_MGCP_PORT.receive(MgcpCommand:?) -> value mgcp_cmd { |
| ipa_ud := { |
| streamId := IPAC_PROTO_OSMO, |
| streamIdExt := IPAC_PROTO_EXT_MGCP, |
| payload := char2oct(enc_MgcpCommand(mgcp_cmd)) |
| } |
| IPA_PORT.send(f_from_asp(g_ipa_conn_id, ipa_ud)); |
| } |
| [] IPA_MGCP_PORT.receive(MgcpResponse:?) -> value mgcp_rsp { |
| ipa_ud := { |
| streamId := IPAC_PROTO_OSMO, |
| streamIdExt := IPAC_PROTO_EXT_MGCP, |
| payload := char2oct(enc_MgcpResponse(mgcp_rsp)) |
| } |
| IPA_PORT.send(f_from_asp(g_ipa_conn_id, ipa_ud)); |
| } |
| |
| |
| /* Received MISC (RSL/OML/CTRL) -> down into IPA */ |
| [] IPA_SP_PORT.receive(ASP_IPA_Unitdata: ?) -> value ipa_ud { |
| IPA_PORT.send(f_from_asp(g_ipa_conn_id, ipa_ud)); |
| } |
| |
| |
| } |
| } |
| } |
| |
| } |