Harald Welte | d86cdc6 | 2017-11-22 00:45:07 +0100 | [diff] [blame^] | 1 | module IPA_Emulation { |
| 2 | |
| 3 | import from IPA_Types all; |
| 4 | import from IPA_CodecPort all; |
| 5 | import from IPA_CodecPort_CtrlFunct all; |
| 6 | import from IPL4asp_Types all; |
| 7 | import from MTP3asp_Types all; |
| 8 | import from MTP3asp_PortType all; |
| 9 | |
| 10 | /* |
| 11 | modulepar { |
| 12 | } |
| 13 | */ |
| 14 | |
| 15 | type component IPA_Emulation_CT { |
| 16 | /* down-facing port to IPA codec port */ |
| 17 | port IPA_CODEC_PT IPA_PORT; |
| 18 | /* up-facing port to SCCP */ |
| 19 | port MTP3asp_SP_PT MTP3_SP_PORT; |
| 20 | |
| 21 | var boolean g_initialized := false; |
| 22 | var ConnectionId g_ipa_conn_id := -1; |
| 23 | } |
| 24 | |
| 25 | function f_connect(charstring remote_host, PortNumber remote_port, |
| 26 | charstring local_host, PortNumber local_port) runs on IPA_Emulation_CT { |
| 27 | var Result res; |
| 28 | res := IPA_CodecPort_CtrlFunct.f_IPL4_connect(IPA_PORT, remote_host, remote_port, |
| 29 | local_host, local_port, 0, { tcp:={} }); |
| 30 | g_ipa_conn_id := res.connId; |
| 31 | } |
| 32 | |
| 33 | template ASP_MTP3_TRANSFERind ts_MTP3_XFER_ind(integer opc, octetstring data) := { |
| 34 | sio := { '10'B, '00'B, '0011'B }, |
| 35 | opc := opc, |
| 36 | dpc := 0, |
| 37 | sls := 0, |
| 38 | data := data |
| 39 | } |
| 40 | |
| 41 | |
| 42 | private template IpaCcmRespPart t_IdRespPart(IpaCcmIdTag tag, charstring payload) := { |
| 43 | len := 0, /* overwritten by codec */ |
| 44 | tag := tag, |
| 45 | data := payload |
| 46 | } |
| 47 | |
| 48 | /* build IPA CCM ID RESP response from IPA CCM GET */ |
| 49 | private function f_ccm_make_id_resp(PDU_IPA_CCM get) return PDU_IPA_CCM { |
| 50 | var integer i; |
| 51 | var PDU_IPA_CCM resp := { |
| 52 | msg_type := IPAC_MSGT_ID_RESP, |
| 53 | u := { |
| 54 | resp := {} |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | for (i := 0; i < sizeof(get.u.get); i := i + 1) { |
| 59 | var IpaCcmIdTag tag := get.u.get[i].tag; |
| 60 | var charstring foo; |
| 61 | select (tag) { |
| 62 | case (IPAC_IDTAG_UNIT) { |
| 63 | foo := "0/1/2"; |
| 64 | } |
| 65 | case (IPAC_IDTAG_UNITNAME) { |
| 66 | foo := "mahlzeit"; |
| 67 | } |
| 68 | case else { |
| 69 | foo := "foo"; |
| 70 | } |
| 71 | } |
| 72 | resp.u.resp[sizeof(resp.u.resp)] := valueof(t_IdRespPart(tag, foo)); |
| 73 | } |
| 74 | |
| 75 | return resp; |
| 76 | } |
| 77 | |
| 78 | /* transmit IPA CCM message */ |
| 79 | private function f_ccm_tx(PDU_IPA_CCM ccm) runs on IPA_Emulation_CT { |
| 80 | var IPA_Send ipa_tx := { |
| 81 | connId := g_ipa_conn_id, |
| 82 | streamId := IPAC_PROTO_CCM, |
| 83 | msg := enc_PDU_IPA_CCM(ccm) |
| 84 | } |
| 85 | log("CCM Tx:", ccm); |
| 86 | IPA_PORT.send(ipa_tx); |
| 87 | } |
| 88 | |
| 89 | template PDU_IPA_CCM ts_IPA_PONG := { |
| 90 | msg_type := IPAC_MSGT_PONG, |
| 91 | u := omit |
| 92 | } |
| 93 | |
| 94 | template PDU_IPA_CCM ts_IPA_ACK := { |
| 95 | msg_type := IPAC_MSGT_ID_ACK, |
| 96 | u := omit |
| 97 | } |
| 98 | |
| 99 | /* receive IPA CCM message */ |
| 100 | private function f_ccm_rx(PDU_IPA_CCM ccm) runs on IPA_Emulation_CT { |
| 101 | select (ccm.msg_type) { |
| 102 | case (IPAC_MSGT_PING) { |
| 103 | f_ccm_tx(valueof(ts_IPA_PONG)); |
| 104 | } |
| 105 | case (IPAC_MSGT_ID_ACK) { |
| 106 | f_ccm_tx(valueof(ts_IPA_ACK)); |
| 107 | } |
| 108 | case (IPAC_MSGT_ID_GET) { |
| 109 | f_ccm_tx(f_ccm_make_id_resp(ccm)); |
| 110 | } |
| 111 | case else { |
| 112 | log("Unknown/unsupported IPA CCM message type", ccm); |
| 113 | } |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | |
| 118 | function ScanEvents() runs on IPA_Emulation_CT { |
| 119 | var IPA_RecvFrom ipa_rx; |
| 120 | var ASP_MTP3_TRANSFERreq mtp_req; |
| 121 | |
| 122 | f_connect("127.0.0.1", 5000, "127.0.0.1", 49999); |
| 123 | |
| 124 | while (true) { |
| 125 | alt { |
| 126 | /* Received IPA -> up into SCCP stack */ |
| 127 | [] IPA_PORT.receive(IPA_RecvFrom: ?) -> value ipa_rx { |
| 128 | select (ipa_rx.streamId) { |
| 129 | case (IPAC_PROTO_CCM) { |
| 130 | var PDU_IPA_CCM ccm := dec_PDU_IPA_CCM(ipa_rx.msg); |
| 131 | log("CCM Rx:", ccm); |
| 132 | f_ccm_rx(ccm); |
| 133 | } |
| 134 | case (IPAC_PROTO_SCCP) { |
| 135 | var ASP_MTP3_TRANSFERind mtp; |
| 136 | mtp := valueof(ts_MTP3_XFER_ind(0, ipa_rx.msg)); |
| 137 | MTP3_SP_PORT.send(mtp); |
| 138 | } |
| 139 | case else { |
| 140 | log("Unknown/unsupported IPA Stream ID", ipa_rx); |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /* Received SCCP -> down into IPA */ |
| 146 | [] MTP3_SP_PORT.receive(ASP_MTP3_TRANSFERreq: ?) -> value mtp_req { |
| 147 | var IPA_Send ipa_tx := { |
| 148 | connId := g_ipa_conn_id, |
| 149 | streamId := IPAC_PROTO_SCCP, |
| 150 | msg := mtp_req.data |
| 151 | } |
| 152 | IPA_PORT.send(ipa_tx); |
| 153 | } |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | } |