hook up the existing m2ua code into the ss7_link infrastructure
After this commit, it is possible to add #sigtran_link{type=m2ua}
using the osmo_ss7_sup:add_mtp_link() API.
The actual M2UA code appears to be incomplete at this point
This commit is contained in:
parent
049ee73509
commit
5c9f3b5862
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@ -16,6 +16,7 @@
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sccp_codec,
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osmo_ss7_sup, osmo_ss7_app,
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ss7_links, ss7_link_m3ua, ss7_link_ipa_client,
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ss7_link_m2ua,
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ss7_routes,
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ss7_service_dump,
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osmo_ss7_gtt,
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@ -56,6 +56,12 @@ add_mtp_link(L=#sigtran_link{type = m3ua, name = Name,
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ChildSpec = {ChildName, {ss7_link_m3ua, start_link, [L]},
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permanent, 2000, worker, [ss7_link_m3ua]},
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supervisor:start_child(?MODULE, ChildSpec);
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add_mtp_link(L=#sigtran_link{type = m2ua, name = Name,
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local = Local, remote = Remote}) ->
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ChildName = list_to_atom("ss7_link_m2ua_" ++ Name),
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ChildSpec = {ChildName, {ss7_link_m2ua, start_link, [L]},
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permanent, 2000, worker, [ss7_link_m2ua]},
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supervisor:start_child(?MODULE, ChildSpec);
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add_mtp_link(L=#sigtran_link{type = ipa_client, name = Name}) ->
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ChildName = list_to_atom("ss7_link_ipa_client_" ++ Name),
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ChildSpec = {ChildName, {ss7_link_ipa_client, start_link, [L]},
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@ -0,0 +1,133 @@
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% Osmocom adaptor to interface the M2UA core with osmo_sccp
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% (C) 2013 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(ss7_link_m2ua).
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-author('Harald Welte <laforge@gnumonks.org>').
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-behavior(gen_server).
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-include_lib("osmo_ss7/include/osmo_util.hrl").
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-include_lib("osmo_ss7/include/m2ua.hrl").
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-include_lib("osmo_ss7/include/sccp.hrl").
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-include_lib("osmo_ss7/include/osmo_ss7.hrl").
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-export([start_link/1, init/1]).
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-export([handle_cast/2]).
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-record(loop_dat, {
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m2ua_pid,
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link
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}).
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start_link(Args) ->
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gen_server:start_link(?MODULE, Args, [{debug, [trace]}]).
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init(L = #sigtran_link{type = m2ua, name = Name, linkset_name = LinksetName,
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sls = Sls, local = Local, remote = Remote}) ->
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#sigtran_peer{ip = LocalIp, port = LocalPort} = Local,
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#sigtran_peer{ip = RemoteIp, port = RemotePort} = Remote,
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% start the M2UA link to the SG
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Opts = [{module, sctp_m2ua}, {module_args, []},
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{user_pid, self()}, {sctp_remote_ip, RemoteIp},
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{sctp_remote_port, RemotePort}, {sctp_local_port, LocalPort},
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{user_fun, fun m2ua_tx_to_user/2}, {user_args, self()}],
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{ok, M2uaPid} = sctp_core:start_link(Opts),
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% FIXME: register this link with SCCP_SCRC
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ok = ss7_links:register_link(LinksetName, Sls, Name),
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{ok, #loop_dat{m2ua_pid = M2uaPid, link = L}}.
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% % instantiate SCCP routing instance
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% {ok, ScrcPid} = sccp_scrc:start_link([{mtp_tx_action, {callback_fn, fun scrc_tx_to_mtp/2, M3uaPid}}]),
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% loop(#loop_dat{m2ua_pid = M3uaPid, scrc_pid = ScrcPid}).
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set_link_state(#sigtran_link{linkset_name = LinksetName, sls = Sls}, State) ->
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ok = ss7_links:set_link_state(LinksetName, Sls, State).
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scrc_tx_to_mtp(Prim, Args) ->
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M2uaPid = Args,
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gen_fsm:send_event(M2uaPid, Prim).
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% Callback that we pass to the m3ua_core, which it will call when it wants to
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% send a primitive up the stack to SCCP
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m2ua_tx_to_user(P=#primitive{subsystem = 'MTP'}, Args) ->
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% send it directly to the 'service' that has bound
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ss7_links:mtp3_rx(P);
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m2ua_tx_to_user(P=#primitive{subsystem = 'M'}, Args) ->
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% send management primitives into the m2ua_link process
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UserPid = Args,
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gen_server:cast(UserPid, P).
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handle_cast(P = #primitive{subsystem = 'MTP', gen_name = 'TRANSFER', spec_name = request}, L) ->
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scrc_tx_to_mtp(P, L#loop_dat.m2ua_pid),
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{noreply, L};
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% This is what we receive from m2ua_tx_to_user/2
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handle_cast(#primitive{subsystem = 'M', gen_name = 'SCTP_ESTABLISH', spec_name = confirm}, L) ->
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io:format("~p: SCTP_ESTABLISH.ind -> ASP_UP.req~n", [?MODULE]),
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gen_fsm:send_event(L#loop_dat.m2ua_pid, osmo_util:make_prim('M','ASP_UP',request)),
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{noreply, L};
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handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_UP', spec_name = confirm}, L) ->
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io:format("~p: ASP_UP.ind -> ASP_ACTIVE.req~n", [?MODULE]),
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set_link_state(L#loop_dat.link, up),
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gen_fsm:send_event(L#loop_dat.m2ua_pid, osmo_util:make_prim('M','ASP_ACTIVE',request)),
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{noreply, L};
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handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_ACTIVE', spec_name = confirm}, L) ->
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io:format("~p: ASP_ACTIVE.ind - M2UA now active and ready~n", [?MODULE]),
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set_link_state(L#loop_dat.link, active),
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%tx_sccp_udt(L#loop_dat.scrc_pid),
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{noreply, L};
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handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_DOWN'}, L) ->
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io:format("~p: ASP_DOWN.ind~n", [?MODULE]),
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set_link_state(L#loop_dat.link, down),
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{noreply, L};
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handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_INACTIVE'}, L) ->
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io:format("~p: ASP_INACTIVE.ind~n", [?MODULE]),
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set_link_state(L#loop_dat.link, up),
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{noreply, L};
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handle_cast(P, L) ->
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io:format("~p: Ignoring M2UA prim ~p~n", [?MODULE, P]),
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{noreply, L}.
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terminate(Reason, _S) ->
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io:format("terminating ~p with reason ~p", [?MODULE, Reason]),
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ok.
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tx_sccp_udt(ScrcPid) ->
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CallingP = #sccp_addr{ssn = ?SCCP_SSN_MSC, point_code = osmo_util:pointcode2int(itu, {1,2,2})},
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CalledP = #sccp_addr{ssn = ?SCCP_SSN_HLR, point_code = osmo_util:pointcode2int(itu, {1,1,1})},
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Data = <<1,2,3,4>>,
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Opts = [{protocol_class, 0}, {called_party_addr, CalledP},
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{calling_party_addr, CallingP}, {user_data, Data}],
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io:format("~p: Sending N-UNITDATA.req to SCRC~n", [?MODULE]),
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gen_fsm:send_event(ScrcPid, osmo_util:make_prim('N','UNITDATA',request,Opts)).
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