112 lines
4.7 KiB
Erlang
112 lines
4.7 KiB
Erlang
% M3UA ASP xua_asp_fsm callback
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% (C) 2011-2012 by Harald Welte <laforge@gnumonks.org>
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%
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% All Rights Reserved
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%
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% This program is free software; you can redistribute it and/or modify
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% it under the terms of the GNU Affero General Public License as
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% published by the Free Software Foundation; either version 3 of the
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% License, or (at your option) any later version.
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%
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% This program is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU Affero General Public License
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% along with this program. If not, see <http://www.gnu.org/licenses/>.
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%
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% Additional Permission under GNU AGPL version 3 section 7:
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%
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% If you modify this Program, or any covered work, by linking or
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% combining it with runtime libraries of Erlang/OTP as released by
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% Ericsson on http://www.erlang.org (or a modified version of these
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% libraries), containing parts covered by the terms of the Erlang Public
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% License (http://www.erlang.org/EPLICENSE), the licensors of this
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% Program grant you additional permission to convey the resulting work
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% without the need to license the runtime libraries of Erlang/OTP under
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% the GNU Affero General Public License. Corresponding Source for a
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% non-source form of such a combination shall include the source code
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% for the parts of the runtime libraries of Erlang/OTP used as well as
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% that of the covered work.
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-module(m3ua_asp).
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-author('Harald Welte <laforge@gnumonks.org>').
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-behaviour(xua_asp_fsm).
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-include("osmo_util.hrl").
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-include("m3ua.hrl").
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-export([init/1]).
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-export([gen_xua_msg/3, asp_down/3, asp_inactive/3, asp_active/3]).
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init([]) ->
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{ok, we_have_no_state}.
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gen_xua_msg(MsgClass, MsgType, Params) ->
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#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType, payload = Params}.
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asp_down(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
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LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
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% convert from M3UA to xua_msg and call into master module
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xua_asp_fsm:asp_down({xua_msg, MsgClass, MsgType}, Mld);
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asp_down(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
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rx_m3ua(M3uaMsg, asp_down, Mld).
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asp_inactive(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
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LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
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% convert from M3UA to xua_msg and call into master module
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xua_asp_fsm:asp_inactive({xua_msg, MsgClass, MsgType}, Mld);
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asp_inactive(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
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rx_m3ua(M3uaMsg, asp_inactive, Mld).
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asp_active(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
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LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
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% convert from M3UA to xua_msg and call into master module
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xua_asp_fsm:asp_active({xua_msg, MsgClass, MsgType}, Mld);
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asp_active(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
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rx_m3ua(M3uaMsg, asp_active, Mld).
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rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT,
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msg_type = ?M3UA_MSGT_MGMT_NTFY}, State, LoopDat) ->
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xua_asp_fsm:send_prim_to_user(LoopDat, osmo_util:make_prim('M','NOTIFY',indication,[Msg])),
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{next_state, State, LoopDat};
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rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_ASPSM,
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msg_type = ?M3UA_MSGT_ASPSM_BEAT}, State, LoopDat) ->
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% Send BEAT_ACK using the same payload as the BEAT msg
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xua_asp_fsm:send_sctp_to_peer(LoopDat, Msg#m3ua_msg{msg_type = ?M3UA_MSGT_ASPSM_BEAT_ACK}),
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{next_state, State, LoopDat};
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rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT,
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msg_type = ?M3UA_MSGT_MGMT_ERR}, State, LoopDat) ->
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xua_asp_fsm:send_prim_to_user(LoopDat, osmo_util:make_prim('M','ERROR',indication,[Msg])),
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{next_state, State, LoopDat};
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rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_SSNM,
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msg_type = MsgType, payload = Params}, State, LoopDat) ->
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% transform to classic MTP primitive and send up to the user
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Mtp = map_ssnm_to_mtp_prim(MsgType),
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xua_asp_fsm:send_prim_to_user(LoopDat, Mtp),
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{next_state, State, LoopDat};
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rx_m3ua(Msg = #m3ua_msg{}, State, LoopDat) ->
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io:format("M3UA Unknown messge ~p in state ~p~n", [Msg, State]),
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{next_state, State, LoopDat}.
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% Transform the M3UA SSNM messages into classic MTP primitives
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map_ssnm_to_mtp_prim(MsgType) ->
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Mtp = #primitive{subsystem = 'MTP', spec_name = indication},
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case MsgType of
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?M3UA_MSGT_SSNM_DUNA -> Mtp#primitive{gen_name = 'PAUSE'};
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?M3UA_MSGT_SSNM_DAVA -> Mtp#primitive{gen_name = 'RESUME'};
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?M3UA_MSGT_SSNM_SCON -> Mtp#primitive{gen_name = 'STATUS'};
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?M3UA_MSGT_SSNM_DUPU -> Mtp#primitive{gen_name = 'STATUS'}
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end.
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