Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 1 | % Osmocom adaptor to interface the IPA core with osmo_sccp |
| 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(ss7_link_ipa_client). |
| 21 | -author('Harald Welte <laforge@gnumonks.org>'). |
| 22 | -behavior(gen_server). |
| 23 | |
| 24 | -include_lib("osmo_ss7/include/osmo_util.hrl"). |
| 25 | %-include_lib("osmo_ss7/include/ipa.hrl"). |
| 26 | -include_lib("osmo_ss7/include/sccp.hrl"). |
| 27 | -include_lib("osmo_ss7/include/osmo_ss7.hrl"). |
| 28 | |
| 29 | -export([start_link/1, init/1]). |
| 30 | |
| 31 | -export([handle_cast/2]). |
| 32 | |
| 33 | -record(loop_dat, { |
| 34 | ipa_pid, |
| 35 | link |
| 36 | }). |
| 37 | |
| 38 | start_link(Args) -> |
| 39 | gen_server:start_link(?MODULE, Args, []). |
| 40 | |
| 41 | init(L = #sigtran_link{type = ipa_client, name = Name, linkset_name = LinksetName, |
| 42 | sls = Sls, local = Local, remote = Remote}) -> |
| 43 | #sigtran_peer{ip = LocalIp, port = LocalPort} = Local, |
| 44 | #sigtran_peer{ip = RemoteIp, port = RemotePort} = Remote, |
| 45 | % start the IPA link to the SG |
| 46 | Opts = [{user_pid, self()}, {sctp_remote_ip, RemoteIp}, |
| 47 | {sctp_remote_port, RemotePort}, {sctp_local_port, LocalPort}, |
| 48 | {user_fun, fun ipa_tx_to_user/2}, {user_args, self()}], |
| 49 | {ok, IpaPid} = ipa_core:start_link(Opts), |
| 50 | % FIXME: register this link with SCCP_SCRC |
| 51 | ok = ss7_link:register_link(LinksetName, Sls, Name), |
| 52 | {ok, #loop_dat{ipa_pid = IpaPid, link = L}}. |
| 53 | |
| 54 | % % instantiate SCCP routing instance |
| 55 | % {ok, ScrcPid} = sccp_scrc:start_link([{mtp_tx_action, {callback_fn, fun scrc_tx_to_mtp/2, M3uaPid}}]), |
| 56 | % loop(#loop_dat{ipa_pid = M3uaPid, scrc_pid = ScrcPid}). |
| 57 | |
| 58 | |
| 59 | set_link_state(#sigtran_link{linkset_name = LinksetName, sls = Sls}, State) -> |
| 60 | ok = ss7_links:set_link_state(LinksetName, Sls, State). |
| 61 | |
| 62 | scrc_tx_to_mtp(Prim, Args) -> |
| 63 | M3uaPid = Args, |
| 64 | gen_fsm:send_event(M3uaPid, Prim). |
| 65 | |
| 66 | % Callback that we pass to the ipa_core, which it will call when it wants to |
| 67 | % send a primitive up the stack to SCCP |
| 68 | ipa_tx_to_user(Prim, Args) -> |
| 69 | UserPid = Args, |
| 70 | gen_server:cast(UserPid, Prim). |
| 71 | |
| 72 | % This is what we receive from ipa_tx_to_user/2 |
| 73 | handle_cast(#primitive{subsystem = 'M', gen_name = 'SCTP_ESTABLISH', spec_name = confirm}, L) -> |
| 74 | io:format("~p: SCTP_ESTABLISH.ind -> ASP_UP.req~n", [?MODULE]), |
| 75 | gen_fsm:send_event(L#loop_dat.ipa_pid, osmo_util:make_prim('M','ASP_UP',request)), |
| 76 | {noreply, L}; |
| 77 | handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_UP', spec_name = confirm}, L) -> |
| 78 | io:format("~p: ASP_UP.ind -> ASP_ACTIVE.req~n", [?MODULE]), |
Harald Welte | dbe1c88 | 2011-11-04 21:49:23 +0100 | [diff] [blame] | 79 | set_link_state(L#loop_dat.link, up), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 80 | gen_fsm:send_event(L#loop_dat.ipa_pid, osmo_util:make_prim('M','ASP_ACTIVE',request)), |
| 81 | {noreply, L}; |
| 82 | handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_ACTIVE', spec_name = confirm}, L) -> |
| 83 | io:format("~p: ASP_ACTIVE.ind - M3UA now active and ready~n", [?MODULE]), |
Harald Welte | dbe1c88 | 2011-11-04 21:49:23 +0100 | [diff] [blame] | 84 | set_link_state(L#loop_dat.link, active), |
Harald Welte | c6e466e | 2011-10-10 14:03:50 +0200 | [diff] [blame] | 85 | %tx_sccp_udt(L#loop_dat.scrc_pid), |
| 86 | {noreply, L}; |
| 87 | handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_DOWN'}, L) -> |
| 88 | io:format("~p: ASP_DOWN.ind~n", [?MODULE]), |
| 89 | set_link_state(L, down), |
| 90 | {noreply, L}; |
| 91 | handle_cast(#primitive{subsystem = 'M', gen_name = 'ASP_INACTIVE'}, L) -> |
| 92 | io:format("~p: ASP_DOWN.ind~n", [?MODULE]), |
| 93 | set_link_state(L, inactive), |
| 94 | {noreply, L}; |
| 95 | handle_cast(P, L) -> |
| 96 | io:format("~p: Ignoring M3UA prim ~p~n", [?MODULE, P]), |
| 97 | {noreply, L}. |
| 98 | |
| 99 | |
| 100 | tx_sccp_udt(ScrcPid) -> |
| 101 | CallingP = #sccp_addr{ssn = ?SCCP_SSN_MSC, point_code = osmo_util:pointcode2int(itu, {1,2,2})}, |
| 102 | CalledP = #sccp_addr{ssn = ?SCCP_SSN_HLR, point_code = osmo_util:pointcode2int(itu, {1,1,1})}, |
| 103 | Data = <<1,2,3,4>>, |
| 104 | Opts = [{protocol_class, 0}, {called_party_addr, CalledP}, |
| 105 | {calling_party_addr, CallingP}, {user_data, Data}], |
| 106 | io:format("~p: Sending N-UNITDATA.req to SCRC~n", [?MODULE]), |
| 107 | gen_fsm:send_event(ScrcPid, osmo_util:make_prim('N','UNITDATA',request,Opts)). |
| 108 | |