Harald Welte | 033cef0 | 2010-12-19 22:47:14 +0100 | [diff] [blame] | 1 | |
| 2 | % (C) 2010 by Harald Welte <laforge@gnumonks.org> |
| 3 | % |
| 4 | % All Rights Reserved |
| 5 | % |
| 6 | % This program is free software; you can redistribute it and/or modify |
| 7 | % it under the terms of the GNU Affero General Public License as |
| 8 | % published by the Free Software Foundation; either version 3 of the |
| 9 | % License, or (at your option) any later version. |
| 10 | % |
| 11 | % This program is distributed in the hope that it will be useful, |
| 12 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | % GNU General Public License for more details. |
| 15 | % |
| 16 | % You should have received a copy of the GNU Affero General Public License |
| 17 | % along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | |
| 19 | -module(sccp_user). |
| 20 | -author('Harald Welte <laforge@gnumonks.org>'). |
| 21 | -export([init/3]). |
| 22 | |
| 23 | -include("sccp.hrl"). |
| 24 | |
| 25 | -define(IPA_STREAM_ID_SCCP, 253). |
| 26 | |
| 27 | -record(loop_data, { |
| 28 | ipa_stream_id |
| 29 | }). |
| 30 | |
| 31 | init(TcpServerPort, IpaStreamId, Opts) -> |
| 32 | ipa_proto:init(), |
| 33 | % Create listening IPA socket |
| 34 | ipa_proto:start_listen(TcpServerPort, 1, Opts), |
| 35 | loop(#loop_data{ipa_stream_id = IpaStreamId}). |
| 36 | |
| 37 | % callback function to be called by IPA socket handler if it receives some data |
| 38 | sccp_ipa_adapter_cb(S, IpaStreamID, DataBin, [ScrcPid]) -> |
| 39 | io:format("sccp_ipa_adapter_cb (Socket ~p, Stream ~p), passing data to SCRP~n", [S, IpaStreamID]), |
| 40 | % hand any incoming IPA message off into the SCCP stacks SCRC |
| 41 | gen_fsm:send_event(ScrcPid, sccp_scoc:make_prim('MTP', 'TRANSFER', indication, DataBin)). |
| 42 | |
| 43 | % callback function to be called by SCCP if it wants to transmit some data |
| 44 | sccp_to_ipa_cb(#primitive{subsystem = 'MTP', gen_name = 'TRANSFER', |
| 45 | spec_name = request, parameters = DataBin}, [IpaPid, S, IpaStreamID]) -> |
| 46 | %ipa_proto:send(S, IpaStreamID, DataBin). |
| 47 | io:format("sccp_to_ipa_cb: Sending to ~p ~p/~p: ~p~n", [IpaPid, S,IpaStreamID, DataBin]), |
| 48 | IpaPid ! {ipa_send, S, IpaStreamID, DataBin}. |
| 49 | |
| 50 | loop(LoopData) -> |
| 51 | receive |
| 52 | {ipa_tcp_accept, S} -> |
| 53 | io:format("sccp_ipa_adapter: ipa_tcp_accept from ~p~n", [inet:peername(S)]), |
Harald Welte | 13688ae | 2010-12-20 13:27:00 +0100 | [diff] [blame] | 54 | IpaStreamId = LoopData#loop_data.ipa_stream_id, |
Harald Welte | 033cef0 | 2010-12-19 22:47:14 +0100 | [diff] [blame] | 55 | % hand over the socket into the IPA stack |
| 56 | {ok, IpaPid} = ipa_proto:register_socket(S), |
| 57 | % Start the SCRC FSM for this virtual MTP link |
Harald Welte | 13688ae | 2010-12-20 13:27:00 +0100 | [diff] [blame] | 58 | ScrcMtpCb = {callback_fn, fun sccp_to_ipa_cb/2, [IpaPid, S, IpaStreamId]}, |
Harald Welte | 033cef0 | 2010-12-19 22:47:14 +0100 | [diff] [blame] | 59 | {ok, ScrcPid} = sccp_scrc:start_link([{mtp_tx_action, ScrcMtpCb}]), |
| 60 | % Register an IPA stream for SCCP |
Harald Welte | 13688ae | 2010-12-20 13:27:00 +0100 | [diff] [blame] | 61 | ipa_proto:register_stream(S, IpaStreamId, |
Harald Welte | 033cef0 | 2010-12-19 22:47:14 +0100 | [diff] [blame] | 62 | {callback_fn, fun sccp_ipa_adapter_cb/4, [ScrcPid]}), |
| 63 | ipa_proto:unblock(S), |
| 64 | loop(LoopData); |
| 65 | % this code should later be moved into the actual MSC |
| 66 | {sccp, Prim} -> |
| 67 | io:format("sccp_user has received primitive ~p~n", [Prim]), |
| 68 | handle_sccp_prim(Prim), |
| 69 | loop(LoopData) |
| 70 | end. |
| 71 | |
| 72 | |
| 73 | handle_sccp_prim(#primitive{subsystem = 'N', gen_name = 'CONNECT', |
| 74 | spec_name = indication, parameters = Params}) -> |
| 75 | %RespPrim = Prim#primitive{spec_name = response}, |
| 76 | RespPrim = sccp_scoc:make_prim('N', 'CONNECT', response, []), |
| 77 | ScocPid = proplists:get_value(scoc_pid, Params), |
| 78 | gen_fsm:send_event(ScocPid, RespPrim); |
| 79 | handle_sccp_prim(#primitive{}) -> |
| 80 | ok. |