Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 1 | % M3UA in accordance with RFC4666 (http://tools.ietf.org/html/rfc4666) |
| 2 | |
| 3 | % (C) 2011 by Harald Welte <laforge@gnumonks.org> |
| 4 | % |
| 5 | % All Rights Reserved |
| 6 | % |
| 7 | % This program is free software; you can redistribute it and/or modify |
| 8 | % it under the terms of the GNU Affero General Public License as |
| 9 | % published by the Free Software Foundation; either version 3 of the |
| 10 | % License, or (at your option) any later version. |
| 11 | % |
| 12 | % This program is distributed in the hope that it will be useful, |
| 13 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | % GNU General Public License for more details. |
| 16 | % |
| 17 | % You should have received a copy of the GNU Affero General Public License |
| 18 | % along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 19 | |
| 20 | -module(m3ua_core). |
| 21 | -author('Harald Welte <laforge@gnumonks.org>'). |
Harald Welte | ead1ba1 | 2011-04-15 10:20:04 +0200 | [diff] [blame] | 22 | -behaviour(gen_fsm). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 23 | |
| 24 | -include_lib("kernel/include/inet_sctp.hrl"). |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 25 | -include("osmo_util.hrl"). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 26 | -include("sccp.hrl"). |
| 27 | -include("m3ua.hrl"). |
| 28 | |
| 29 | -export([start_link/1]). |
| 30 | |
Harald Welte | b2d3abf | 2011-04-04 11:26:11 +0200 | [diff] [blame] | 31 | -export([init/1, terminate/3, code_change/4, handle_event/3, handle_info/3]). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 32 | |
| 33 | % FSM states: |
| 34 | -export([asp_down/2, asp_inactive/2, asp_active/2]). |
| 35 | |
| 36 | -define(T_ACK_TIMEOUT, 2*60*100). |
| 37 | |
| 38 | % Loop Data |
| 39 | -record(m3ua_state, { |
| 40 | role, % asp | sgp |
| 41 | asp_state, % down, inactive, active |
| 42 | t_ack, |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 43 | user_fun, |
| 44 | user_args, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 45 | sctp_remote_ip, |
| 46 | sctp_remote_port, |
Harald Welte | 8a0ab00 | 2011-04-03 22:16:12 +0200 | [diff] [blame] | 47 | sctp_local_port, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 48 | sctp_sock, |
| 49 | sctp_assoc_id |
| 50 | }). |
| 51 | |
| 52 | start_link(InitOpts) -> |
| 53 | gen_fsm:start_link(?MODULE, InitOpts, [{debug, [trace]}]). |
| 54 | |
| 55 | reconnect_sctp(L = #m3ua_state{sctp_remote_ip = Ip, sctp_remote_port = Port, sctp_sock = Sock}) -> |
| 56 | io:format("SCTP Reconnect ~p:~p~n", [Ip, Port]), |
Harald Welte | 8a0ab00 | 2011-04-03 22:16:12 +0200 | [diff] [blame] | 57 | InitMsg = #sctp_initmsg{num_ostreams = 2, max_instreams = 2}, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 58 | case gen_sctp:connect(Sock, Ip, Port, [{active, once}, {reuseaddr, true}, |
| 59 | {sctp_initmsg, InitMsg}]) of |
| 60 | {ok, Assoc} -> |
Harald Welte | 9544cab | 2011-04-04 17:03:23 +0200 | [diff] [blame] | 61 | send_prim_to_user(L, osmo_util:make_prim('M','SCTP_ESTABLISH',confirm)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 62 | L#m3ua_state{sctp_assoc_id = Assoc#sctp_assoc_change.assoc_id}; |
| 63 | {error, Error } -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 64 | io:format("SCTP Error ~p, reconnecting~n", [Error]), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 65 | reconnect_sctp(L) |
| 66 | end. |
| 67 | |
| 68 | init(InitOpts) -> |
Harald Welte | 8a0ab00 | 2011-04-03 22:16:12 +0200 | [diff] [blame] | 69 | OpenOptsBase = [{active, once}, {reuseaddr, true}], |
| 70 | LocalPort = proplists:get_value(sctp_local_port, InitOpts), |
| 71 | case LocalPort of |
| 72 | undefined -> |
| 73 | OpenOpts = OpenOptsBase; |
| 74 | _ -> |
| 75 | OpenOpts = OpenOptsBase ++ [{port, LocalPort}] |
| 76 | end, |
| 77 | {ok, SctpSock} = gen_sctp:open(OpenOpts), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 78 | LoopDat = #m3ua_state{role = asp, sctp_sock = SctpSock, |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 79 | user_fun = proplists:get_value(user_fun, InitOpts), |
| 80 | user_args = proplists:get_value(user_args, InitOpts), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 81 | sctp_remote_ip = proplists:get_value(sctp_remote_ip, InitOpts), |
Harald Welte | 8a0ab00 | 2011-04-03 22:16:12 +0200 | [diff] [blame] | 82 | sctp_remote_port = proplists:get_value(sctp_remote_port, InitOpts), |
| 83 | sctp_local_port = LocalPort}, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 84 | LoopDat2 = reconnect_sctp(LoopDat), |
| 85 | {ok, asp_down, LoopDat2}. |
| 86 | |
Harald Welte | b2d3abf | 2011-04-04 11:26:11 +0200 | [diff] [blame] | 87 | terminate(Reason, _State, LoopDat) -> |
| 88 | io:format("Terminating ~p (Reason: ~p)~n", [?MODULE, Reason]), |
| 89 | gen_sctp:close(LoopDat#m3ua_state.sctp_sock). |
| 90 | |
| 91 | code_change(_OldVsn, StateName, StateData, _Extra) -> |
| 92 | {ok, StateName, StateData}. |
| 93 | |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 94 | % Helper function to send data to the SCTP peer |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 95 | send_sctp_to_peer(LoopDat, PktData, StreamId) when is_binary(PktData) -> |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 96 | #m3ua_state{sctp_sock = Sock, sctp_assoc_id = Assoc} = LoopDat, |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 97 | SndRcvInfo = #sctp_sndrcvinfo{assoc_id = Assoc, ppid = 3, stream = StreamId}, |
| 98 | gen_sctp:send(Sock, SndRcvInfo, PktData). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 99 | |
| 100 | % same as above, but for un-encoded #m3ua_msg{} |
| 101 | send_sctp_to_peer(LoopDat, M3uaMsg) when is_record(M3uaMsg, m3ua_msg) -> |
| 102 | MsgBin = m3ua_codec:encode_m3ua_msg(M3uaMsg), |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 103 | StreamId = sctp_stream_for_m3ua(M3uaMsg), |
| 104 | send_sctp_to_peer(LoopDat, MsgBin, StreamId). |
| 105 | |
| 106 | % resolve the Stream ID depending on the m3ua_msg: 0 == management, 1 == trafic |
| 107 | sctp_stream_for_m3ua(#m3ua_msg{msg_class = Class}) when |
| 108 | Class == ?M3UA_MSGC_TRANSFER -> |
| 109 | 1; |
| 110 | sctp_stream_for_m3ua(#m3ua_msg{}) -> |
| 111 | 0. |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 112 | |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 113 | |
| 114 | send_prim_to_user(LoopDat, Prim) when is_record(LoopDat, m3ua_state), is_record(Prim, primitive) -> |
Harald Welte | cb1c068 | 2011-04-14 21:56:26 +0200 | [diff] [blame] | 115 | #m3ua_state{user_fun = Fun, user_args = Args} = LoopDat, |
| 116 | Fun(Prim, Args). |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 117 | |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 118 | % helper to send one of the up/down/act/inact management messages + start timer |
| 119 | send_msg_start_tack(LoopDat, State, MsgClass, MsgType, Params) -> |
| 120 | % generate and send the respective message |
| 121 | Msg = #m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType, payload = Params}, |
| 122 | send_sctp_to_peer(LoopDat, Msg), |
| 123 | % start T(ack) timer and wait for ASP_UP_ACK |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 124 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 125 | {ok, Tack} = timer:apply_after(?T_ACK_TIMEOUT, gen_fsm, send_event, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 126 | [self(), {timer_expired, t_ack, {MsgClass, MsgType, Params}}]), |
| 127 | {next_state, State, LoopDat#m3ua_state{t_ack = Tack}}. |
| 128 | |
| 129 | |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 130 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 131 | handle_event(Event, State, LoopDat) -> |
| 132 | io:format("Unknown Event ~p in state ~p~n", [Event, State]), |
| 133 | {next_state, State, LoopDat}. |
| 134 | |
| 135 | |
| 136 | |
| 137 | handle_info({sctp, Socket, _RemoteIp, _RemotePort, {ANC, SAC}}, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 138 | _State, LoopDat) when is_record(SAC, sctp_assoc_change) -> |
| 139 | io:format("SCTP Assoc Change ~p ~p~n", [ANC, SAC]), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 140 | #sctp_assoc_change{state = SacState, outbound_streams = _OutStreams, |
Harald Welte | b2d3abf | 2011-04-04 11:26:11 +0200 | [diff] [blame] | 141 | inbound_streams = _InStreams, assoc_id = _AssocId} = SAC, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 142 | case SacState of |
| 143 | comm_up -> |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 144 | % primmitive to the user |
| 145 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','SCTP_ESTABLISH',confirm)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 146 | LoopDat2 = LoopDat; |
| 147 | comm_lost -> |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 148 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','SCTP_RELEASE',indication)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 149 | LoopDat2 = reconnect_sctp(LoopDat); |
| 150 | addr_unreachable -> |
| 151 | LoopDat2 = reconnect_sctp(LoopDat) |
| 152 | end, |
| 153 | inet:setopts(Socket, [{active, once}]), |
| 154 | {next_state, asp_down, LoopDat2}; |
| 155 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 156 | handle_info({sctp, Socket, RemoteIp, RemotePort, {[Anc], Data}}, State, LoopDat) -> |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 157 | io:format("SCTP rx data: ~p ~p~n", [Anc, Data]), |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 158 | % process incoming SCTP data |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 159 | if Socket == LoopDat#m3ua_state.sctp_sock, |
| 160 | RemoteIp == LoopDat#m3ua_state.sctp_remote_ip, |
| 161 | RemotePort == LoopDat#m3ua_state.sctp_remote_port, |
| 162 | 3 == Anc#sctp_sndrcvinfo.ppid -> |
| 163 | Ret = rx_sctp(Anc, Data, State, LoopDat); |
| 164 | true -> |
| 165 | io:format("unknown SCTP: ~p ~p~n", [Anc, Data]), |
| 166 | Ret = {next_state, State, LoopDat} |
| 167 | end, |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 168 | inet:setopts(Socket, [{active, once}]), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 169 | Ret; |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 170 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 171 | handle_info({sctp, Socket, RemoteIp, RemotePort, {_Anc, Data}}, _State, LoopDat) |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 172 | when is_record(Data, sctp_shutdown_event) -> |
| 173 | io:format("SCTP remote ~p:~p shutdown~n", [RemoteIp, RemotePort]), |
| 174 | inet:setopts(Socket, [{active, once}]), |
| 175 | {next_state, asp_down, LoopDat}. |
| 176 | |
| 177 | |
| 178 | |
| 179 | asp_down(#primitive{subsystem = 'M', gen_name = 'ASP_UP', |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 180 | spec_name = request, parameters = _Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 181 | % M-ASP_UP.req from user, generate message and send to remote peer |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 182 | send_msg_start_tack(LoopDat, asp_down, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPUP, []); |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 183 | asp_down({timer_expired, t_ack, {?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPUP, Params}}, LoopDat) -> |
| 184 | send_msg_start_tack(LoopDat, asp_down, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPUP, Params); |
| 185 | |
| 186 | asp_down(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPSM, |
| 187 | msg_type = ?M3UA_MSGT_ASPSM_ASPUP_ACK}, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 188 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 189 | % transition into ASP_INACTIVE |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 190 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ASP_UP',confirm)), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 191 | {next_state, asp_inactive, LoopDat}; |
| 192 | |
| 193 | asp_down(M3uaMsg, LoopDat) when is_record(M3uaMsg, m3ua_msg) -> |
| 194 | rx_m3ua(M3uaMsg, asp_down, LoopDat). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 195 | |
| 196 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 197 | asp_inactive(#primitive{subsystem = 'M', gen_name = 'ASP_ACTIVE', |
| 198 | spec_name = request, parameters = _Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 199 | % M-ASP_ACTIVE.req from user, generate message and send to remote peer |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 200 | send_msg_start_tack(LoopDat, asp_inactive, ?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPAC, |
| 201 | [{?M3UA_IEI_TRAF_MODE_TYPE, <<0,0,0,1>>}]); |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 202 | |
| 203 | asp_inactive({timer_expired, t_ack, {?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPAC, Params}}, LoopDat) -> |
| 204 | send_msg_start_tack(LoopDat, asp_inactive, ?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPAC, Params); |
| 205 | |
| 206 | asp_inactive(#primitive{subsystem = 'M', gen_name = 'ASP_DOWN', |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 207 | spec_name = request, parameters = _Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 208 | % M-ASP_DOWN.req from user, generate message and send to remote peer |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 209 | send_msg_start_tack(LoopDat, asp_inactive, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, []); |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 210 | |
| 211 | asp_inactive({timer_expired, t_ack, {?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, Params}}, LoopDat) -> |
| 212 | send_msg_start_tack(LoopDat, asp_inactive, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, Params); |
| 213 | |
| 214 | asp_inactive(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPTM, |
| 215 | msg_type = ?M3UA_MSGT_ASPTM_ASPAC_ACK}, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 216 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 217 | % transition into ASP_ACTIVE |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 218 | % signal this to the user |
| 219 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ASP_ACTIVE',confirm)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 220 | {next_state, asp_active, LoopDat}; |
| 221 | |
| 222 | asp_inactive(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPSM, |
| 223 | msg_type = ?M3UA_MSGT_ASPSM_ASPDN_ACK}, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 224 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 225 | % transition into ASP_DOWN |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 226 | % signal this to the user |
| 227 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ASP_DOWN',confirm)), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 228 | {next_state, asp_down, LoopDat}; |
| 229 | |
| 230 | asp_inactive(M3uaMsg, LoopDat) when is_record(M3uaMsg, m3ua_msg) -> |
| 231 | rx_m3ua(M3uaMsg, asp_inactive, LoopDat). |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 232 | |
| 233 | |
| 234 | |
| 235 | asp_active(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPSM, |
| 236 | msg_type = ?M3UA_MSGT_ASPSM_ASPDN_ACK}, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 237 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 238 | % transition into ASP_DOWN |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 239 | % signal this to the user |
| 240 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ASP_DOWN',confirm)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 241 | {next_state, asp_down, LoopDat}; |
| 242 | |
| 243 | asp_active(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPTM, |
| 244 | msg_type = ?M3UA_MSGT_ASPTM_ASPIA_ACK}, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 245 | timer:cancel(LoopDat#m3ua_state.t_ack), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 246 | % transition into ASP_INACTIVE |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 247 | % signal this to the user |
| 248 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ASP_INACTIVE',confirm)), |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 249 | {next_state, asp_inactive, LoopDat}; |
| 250 | |
| 251 | asp_active(#primitive{subsystem = 'M', gen_name = 'ASP_DOWN', |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 252 | spec_name = request, parameters = _Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 253 | % M-ASP_DOWN.req from user, generate message and send to remote peer |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 254 | send_msg_start_tack(LoopDat, asp_active, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, []); |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 255 | |
| 256 | asp_active({timer_expired, t_ack, {?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, Params}}, LoopDat) -> |
| 257 | send_msg_start_tack(LoopDat, asp_active, ?M3UA_MSGC_ASPSM, ?M3UA_MSGT_ASPSM_ASPDN, Params); |
| 258 | |
| 259 | asp_active(#primitive{subsystem = 'M', gen_name = 'ASP_INACTIVE', |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 260 | spec_name = request, parameters = _Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 261 | % M-ASP_INACTIVE.req from user, generate message and send to remote peer |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 262 | send_msg_start_tack(LoopDat, asp_active, ?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPIA, []); |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 263 | |
| 264 | asp_active({timer_expired, t_ack, {?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPIA, Params}}, LoopDat) -> |
| 265 | send_msg_start_tack(LoopDat, asp_active, ?M3UA_MSGC_ASPTM, ?M3UA_MSGT_ASPTM_ASPIA, Params); |
| 266 | |
| 267 | asp_active(#primitive{subsystem = 'MTP', gen_name = 'TRANSFER', |
| 268 | spec_name = request, parameters = Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 269 | % MTP-TRANSFER.req from user app: Send message to remote peer |
Harald Welte | 3bf7cb6 | 2011-04-03 00:25:34 +0200 | [diff] [blame] | 270 | OptList = [{?M3UA_IEI_PROTOCOL_DATA, Params}], |
| 271 | Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_TRANSFER, |
| 272 | msg_type = ?M3UA_MSGT_XFR_DATA, |
| 273 | payload = OptList}, |
| 274 | send_sctp_to_peer(LoopDat, Msg), |
| 275 | {next_state, asp_active, LoopDat}; |
| 276 | asp_active(#m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_TRANSFER, |
| 277 | msg_type = ?M3UA_MSGT_XFR_DATA, payload = Params}, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 278 | % Data transfer from remote entity: Send MTP-TRANSFER.ind primitive to the user |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 279 | Mtp3 = proplists:get_value(?M3UA_IEI_PROTOCOL_DATA, Params), |
Harald Welte | 7dadde8 | 2011-10-19 13:40:39 +0200 | [diff] [blame] | 280 | send_prim_to_user(LoopDat, osmo_util:make_prim('MTP','TRANSFER',indication,Mtp3)), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 281 | {next_state, asp_active, LoopDat}; |
| 282 | asp_active(#m3ua_msg{msg_class = ?M3UA_MSGC_ASPTM, |
| 283 | msg_type = ?M3UA_MSGT_ASPTM_ASPIA_ACK}, LoopDat) -> |
| 284 | timer:cancel(LoopDat#m3ua_state.t_ack), |
| 285 | % transition to ASP_INACTIVE |
| 286 | {next_state, asp_inactive, LoopDat}; |
| 287 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 288 | asp_active(M3uaMsg, LoopDat) when is_record(M3uaMsg, m3ua_msg) -> |
| 289 | rx_m3ua(M3uaMsg, asp_active, LoopDat). |
| 290 | |
| 291 | |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 292 | |
Harald Welte | b2d3abf | 2011-04-04 11:26:11 +0200 | [diff] [blame] | 293 | rx_sctp(_Anc, Data, State, LoopDat) -> |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 294 | M3uaMsg = m3ua_codec:parse_m3ua_msg(Data), |
| 295 | gen_fsm:send_event(self(), M3uaMsg), |
| 296 | {next_state, State, LoopDat}. |
| 297 | |
| 298 | |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 299 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 300 | rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT, |
| 301 | msg_type = ?M3UA_MSGT_MGMT_NTFY}, State, LoopDat) -> |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 302 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','NOTIFY',indication,[Msg])), |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 303 | {next_state, State, LoopDat}; |
| 304 | |
| 305 | rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_ASPSM, |
| 306 | msg_type = ?M3UA_MSGT_ASPSM_BEAT}, State, LoopDat) -> |
| 307 | % Send BEAT_ACK using the same payload as the BEAT msg |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 308 | send_sctp_to_peer(LoopDat, Msg#m3ua_msg{msg_type = ?M3UA_MSGT_ASPSM_BEAT_ACK}), |
| 309 | {next_state, State, LoopDat}; |
| 310 | |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 311 | rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT, |
| 312 | msg_type = ?M3UA_MSGT_MGMT_ERR}, State, LoopDat) -> |
| 313 | send_prim_to_user(LoopDat, osmo_util:make_prim('M','ERROR',indication,[Msg])), |
| 314 | {next_state, State, LoopDat}; |
| 315 | |
| 316 | rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_SSNM, |
| 317 | msg_type = MsgType, payload = Params}, State, LoopDat) -> |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 318 | % transform to classic MTP primitive and send up to the user |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 319 | Mtp = map_ssnm_to_mtp_prim(MsgType), |
| 320 | send_prim_to_user(LoopDat, Mtp), |
| 321 | {next_state, State, LoopDat}; |
| 322 | |
Harald Welte | 6fc5b29 | 2011-04-04 10:38:30 +0200 | [diff] [blame] | 323 | rx_m3ua(Msg = #m3ua_msg{}, State, LoopDat) -> |
| 324 | io:format("M3UA Unknown messge ~p in state ~p~n", [Msg, State]), |
| 325 | {next_state, State, LoopDat}. |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 326 | |
Harald Welte | b647370 | 2011-04-14 22:06:42 +0200 | [diff] [blame] | 327 | % Transform the M3UA SSNM messages into classic MTP primitives |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 328 | map_ssnm_to_mtp_prim(MsgType) -> |
Harald Welte | 10d77cd | 2011-11-04 22:28:21 +0100 | [diff] [blame] | 329 | Mtp = #primitive{subsystem = 'MTP', spec_name = indication}, |
Harald Welte | e393ea8 | 2011-04-04 16:00:06 +0200 | [diff] [blame] | 330 | case MsgType of |
| 331 | ?M3UA_MSGT_SSNM_DUNA -> Mtp#primitive{gen_name = 'PAUSE'}; |
| 332 | ?M3UA_MSGT_SSNM_DAVA -> Mtp#primitive{gen_name = 'RESUME'}; |
| 333 | ?M3UA_MSGT_SSNM_SCON -> Mtp#primitive{gen_name = 'STATUS'}; |
| 334 | ?M3UA_MSGT_SSNM_DUPU -> Mtp#primitive{gen_name = 'STATUS'} |
| 335 | end. |