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-module(m3ua_example).
-include("osmo_util.hrl").
-include("m3ua.hrl").
-include("sccp.hrl").
-export([init/0]).
-record(loop_dat, {
scrc_pid,
m3ua_pid
}).
init() ->
% start the M3UA link to the SG
Opts = [{user_pid, self()}, {sctp_remote_ip, {192,168,104,2}}, {sctp_remote_port, 2905},
{sctp_local_port, 60180}, {user_fun, fun m3ua_tx_to_user/2}, {user_args, self()}],
{ok, M3uaPid} = m3ua_core:start_link(Opts),
% instantiate SCCP routing instance
{ok, ScrcPid} = sccp_scrc:start_link([{mtp_tx_action, {callback_fn, fun scrc_tx_to_mtp/2, M3uaPid}}]),
loop(#loop_dat{m3ua_pid = M3uaPid, scrc_pid = ScrcPid}).
loop(L) ->
io:format("Example: Entering main loop~n"),
receive
{m3ua_prim, Prim} ->
io:format("Example: Rx M3UA Prim ~p~n", [Prim]),
rx_m3ua_prim(Prim, L);
Stop ->
io:format("Example: Received ~p~n", [Stop]),
exit(stop_received)
end,
loop(L).
scrc_tx_to_mtp(Prim, Args) ->
M3uaPid = Args,
gen_fsm:send_event(M3uaPid, Prim).
m3ua_tx_to_user(Prim, Args) ->
UserPid = Args,
UserPid ! {m3ua_prim, Prim}.
rx_m3ua_prim(#primitive{subsystem = 'M', gen_name = 'SCTP_ESTABLISH', spec_name = confirm}, L) ->
gen_fsm:send_event(L#loop_dat.m3ua_pid, osmo_util:make_prim('M','ASP_UP',request));
rx_m3ua_prim(#primitive{subsystem = 'M', gen_name = 'ASP_UP', spec_name = confirm}, L) ->
gen_fsm:send_event(L#loop_dat.m3ua_pid, osmo_util:make_prim('M','ASP_ACTIVE',request));
rx_m3ua_prim(#primitive{subsystem = 'M', gen_name = 'ASP_ACTIVE', spec_name = confirm}, L) ->
io:format("Example: M3UA now active and ready~n"),
tx_sccp_udt(L#loop_dat.scrc_pid);
rx_m3ua_prim(P, _L) ->
io:format("Example: Ignoring M3UA prim ~p~n", [P]),
ok.
tx_sccp_udt(ScrcPid) ->
CallingP = #sccp_addr{ssn = ?SCCP_SSN_MSC, point_code = osmo_util:pointcode2int(itu, {1,2,2})},
CalledP = #sccp_addr{ssn = ?SCCP_SSN_HLR, point_code = osmo_util:pointcode2int(itu, {1,1,1})},
Data = <<1,2,3,4>>,
Opts = [{protocol_class, 0}, {called_party_addr, CalledP},
{calling_party_addr, CallingP}, {user_data, Data}],
io:format("Example: Sending N-UNITDATA.req to SCRC~n"),
gen_fsm:send_event(ScrcPid, osmo_util:make_prim('N','UNITDATA',request,Opts)).
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