M2PA: implement RC 'fiso_msu_accepted' flag

This flag prevents the accepting of FISU or MSU inside RC, ensuring that
those events cannot enter LSC/IAC during times where they are invalid.

1 files changed, 97 insertions, 0 deletions

diff --git a/src/m3ua_asp.erl b/src/m3ua_asp.erl
new file mode 100644
index 0000000..c459d4a
--- /dev/null
+++ b/src/m3ua_asp.erl
@@ -0,0 +1,97 @@
+% M3UA ASP xua_asp_fsm callback
+
+% (C) 2011-2012 by Harald Welte <laforge@gnumonks.org>
+%
+% All Rights Reserved
+%
+% This program is free software; you can redistribute it and/or modify
+% it under the terms of the GNU Affero General Public License as
+% published by the Free Software Foundation; either version 3 of the
+% License, or (at your option) any later version.
+%
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU Affero General Public License
+% along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+-module(m3ua_asp).
+-author('Harald Welte <laforge@gnumonks.org>').
+-behaviour(xua_asp_fsm).
+
+-include("osmo_util.hrl").
+-include("m3ua.hrl").
+
+-export([init/1]).
+
+-export([gen_xua_msg/3, asp_down/3, asp_inactive/3, asp_active/3]).
+
+init([]) ->
+	{ok, we_have_no_state}.
+
+gen_xua_msg(MsgClass, MsgType, Params) ->
+	#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType, payload = Params}.
+
+asp_down(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
+	 LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
+	% convert from M3UA to xua_msg and call into master module
+	xua_asp_fsm:asp_down({xua_msg, MsgClass, MsgType}, Mld);
+asp_down(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
+	rx_m3ua(M3uaMsg, asp_down, Mld).
+
+asp_inactive(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
+	     LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
+	% convert from M3UA to xua_msg and call into master module
+	xua_asp_fsm:asp_inactive({xua_msg, MsgClass, MsgType}, Mld);
+asp_inactive(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
+	rx_m3ua(M3uaMsg, asp_inactive, Mld).
+
+asp_active(#m3ua_msg{version = 1, msg_class = MsgClass, msg_type = MsgType},
+	   LoopDat, Mld) when MsgClass == ?M3UA_MSGC_ASPSM; MsgClass == ?M3UA_MSGC_ASPTM ->
+	% convert from M3UA to xua_msg and call into master module
+	xua_asp_fsm:asp_active({xua_msg, MsgClass, MsgType}, Mld);
+asp_active(M3uaMsg, LoopDat, Mld) when is_record(M3uaMsg, m3ua_msg) ->
+	rx_m3ua(M3uaMsg, asp_active, Mld).
+
+
+
+
+
+rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT,
+			msg_type = ?M3UA_MSGT_MGMT_NTFY}, State, LoopDat) ->
+	xua_asp_fsm:send_prim_to_user(LoopDat, osmo_util:make_prim('M','NOTIFY',indication,[Msg])),
+	{next_state, State, LoopDat};
+
+rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_ASPSM,
+			msg_type = ?M3UA_MSGT_ASPSM_BEAT}, State, LoopDat) ->
+	% Send BEAT_ACK using the same payload as the BEAT msg
+	xua_asp_fsm:send_sctp_to_peer(LoopDat, Msg#m3ua_msg{msg_type = ?M3UA_MSGT_ASPSM_BEAT_ACK}),
+	{next_state, State, LoopDat};
+
+rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_MGMT,
+			msg_type = ?M3UA_MSGT_MGMT_ERR}, State, LoopDat) ->
+	xua_asp_fsm:send_prim_to_user(LoopDat, osmo_util:make_prim('M','ERROR',indication,[Msg])),
+	{next_state, State, LoopDat};
+
+rx_m3ua(Msg = #m3ua_msg{version = 1, msg_class = ?M3UA_MSGC_SSNM,
+		        msg_type = MsgType, payload = Params}, State, LoopDat) ->
+	% transform to classic MTP primitive and send up to the user
+	Mtp = map_ssnm_to_mtp_prim(MsgType),
+	xua_asp_fsm:send_prim_to_user(LoopDat, Mtp),
+	{next_state, State, LoopDat};
+
+rx_m3ua(Msg = #m3ua_msg{}, State, LoopDat) ->
+	io:format("M3UA Unknown messge ~p in state ~p~n", [Msg, State]),
+	{next_state, State, LoopDat}.
+
+% Transform the M3UA SSNM messages into classic MTP primitives
+map_ssnm_to_mtp_prim(MsgType) ->
+	Mtp = #primitive{subsystem = 'MTP', spec_name = indication},
+	case MsgType of
+	    ?M3UA_MSGT_SSNM_DUNA -> Mtp#primitive{gen_name = 'PAUSE'};
+	    ?M3UA_MSGT_SSNM_DAVA -> Mtp#primitive{gen_name = 'RESUME'};
+	    ?M3UA_MSGT_SSNM_SCON -> Mtp#primitive{gen_name = 'STATUS'};
+	    ?M3UA_MSGT_SSNM_DUPU -> Mtp#primitive{gen_name = 'STATUS'}
+	end.