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%% @doc Backend module for mod_jingle_sip |
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%% @author Michal Piotrowski <michal.piotrowski@erlang-solutions.com> |
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%% |
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%%============================================================================== |
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%% Copyright 2018 Erlang Solutions Ltd. |
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%% |
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%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%% you may not use this file except in compliance with the License. |
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%% You may obtain a copy of the License at |
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%% |
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%% http://www.apache.org/licenses/LICENSE-2.0 |
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%% |
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%% Unless required by applicable law or agreed to in writing, software |
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%% distributed under the License is distributed on an "AS IS" BASIS, |
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%% See the License for the specific language governing permissions and |
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%% limitations under the License. |
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%%============================================================================== |
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-module(mod_jingle_sip_backend). |
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-include("mongoose.hrl"). |
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-type call_id() :: binary(). |
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-type incoming_request() :: {node(), binary()}. |
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-type outgoing_handle() :: binary(). |
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-export([init/2]). |
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-export([set_incoming_request/5]). |
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-export([set_incoming_handle/2]). |
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-export([set_outgoing_request/4]). |
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-export([set_outgoing_handle/4]). |
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-export([set_outgoing_accepted/1]). |
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-export([set_incoming_accepted/1]). |
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-export([get_incoming_request/2]). |
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-export([get_outgoing_handle/2]). |
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-export([get_session_info/2]). |
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-export([remove_session/1]). |
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-ignore_xref([remove_session/1]). |
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-record(jingle_sip_session, {sid, |
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dialog, |
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state, |
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direction, |
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request, |
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node, |
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owner, |
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from, |
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to, |
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now, |
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meta}). |
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init(_Host, _Opts) -> |
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:-( |
mnesia:create_table(jingle_sip_session, |
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[{ram_copies, [node()]}, |
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{attributes, record_info(fields, jingle_sip_session)}]). |
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-spec set_incoming_request(CallID :: call_id(), ReqID :: binary(), |
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From :: jid:jid(), To :: jid:jid(), exml:element()) -> |
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ok | {error, any()}. |
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set_incoming_request(CallID, ReqID, From, To, JingleEl) -> |
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:-( |
TFun = pa:bind(fun set_incoming_request_tr/5, CallID, ReqID, From, To, JingleEl), |
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:-( |
run_transaction(TFun). |
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set_incoming_request_tr(CallID, ReqID, From, To, JingleEl) -> |
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:-( |
Owner = jid:to_lus(To), |
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:-( |
case mnesia:wread({jingle_sip_session, CallID}) of |
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[_] -> |
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:-( |
{error, sid_already_exists}; |
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_ -> |
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Meta = #{init_stanza => JingleEl}, |
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Session = #jingle_sip_session{sid = CallID, |
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request = ReqID, |
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dialog = undefined, |
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state = undefined, |
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direction = in, |
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node = node(), |
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from = jid:to_lus(From), |
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to = Owner, |
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owner = Owner, |
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now = os:system_time(microsecond), |
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meta = Meta}, |
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:-( |
mnesia:write(Session) |
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end. |
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-spec set_outgoing_request(CallID :: call_id(), ReqID :: binary(), |
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From :: jid:jid(), To :: jid:jid()) -> |
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ok | {error, any()}. |
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set_outgoing_request(CallID, ReqID, From, To) -> |
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TFun = pa:bind(fun set_outgoing_request_tr/4, CallID, ReqID, From, To), |
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run_transaction(TFun). |
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set_outgoing_request_tr(CallID, ReqID, From, To) -> |
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Owner = jid:to_lus(From), |
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case mnesia:wread({jingle_sip_session, CallID}) of |
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[_] -> |
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{error, sid_already_exists}; |
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_ -> |
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Session = #jingle_sip_session{sid = CallID, |
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request = ReqID, |
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dialog = undefined, |
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state = undefined, |
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direction = out, |
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node = node(), |
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from = Owner, |
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to = jid:to_lus(To), |
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owner = Owner, |
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now = os:system_time(microsecond), |
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meta = #{}}, |
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mnesia:write(Session) |
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end. |
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run_transaction(TFun) -> |
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:-( |
case mnesia:transaction(TFun) of |
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{atomic, Result} -> |
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Result; |
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{aborted, Reason} -> |
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{error, Reason} |
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end. |
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set_incoming_handle(CallID, DialogHandle) -> |
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TFun = pa:bind(fun set_incoming_handle_tr/2, CallID, DialogHandle), |
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run_transaction(TFun). |
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set_incoming_handle_tr(CallID, DialogHandle) -> |
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case mnesia:wread({jingle_sip_session, CallID}) of |
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[#jingle_sip_session{dialog = undefined, direction = in} = Session] -> |
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Session2 = Session#jingle_sip_session{dialog = DialogHandle, |
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node = node()}, |
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mnesia:write(Session2); |
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[_] -> |
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{error, incoming_handle_exists}; |
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_ -> |
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{error, not_found} |
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end. |
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set_outgoing_handle(CallID, DialogHandle, From, To) -> |
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TFun = pa:bind(fun set_outgoing_handle_tr/4, CallID, DialogHandle, From, To), |
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run_transaction(TFun). |
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set_outgoing_handle_tr(CallID, DialogHandle, _From, _To) -> |
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case mnesia:wread({jingle_sip_session, CallID}) of |
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[#jingle_sip_session{dialog = undefined, direction = out} = Session] -> |
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Session2 = Session#jingle_sip_session{dialog = DialogHandle, |
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node = node()}, |
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mnesia:write(Session2); |
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[_] -> |
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{error, outgoing_handle_exists}; |
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_ -> |
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Session = #jingle_sip_session{sid = CallID, |
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dialog = DialogHandle, |
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node = node(), |
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direction = out, |
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state = ringing}, |
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mnesia:write(Session) |
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end. |
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set_incoming_accepted(CallID) -> |
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:-( |
TFun = pa:bind(fun set_incoming_accepted_tr/1, CallID), |
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run_transaction(TFun). |
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set_incoming_accepted_tr(CallID) -> |
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:-( |
case mnesia:wread({jingle_sip_session, CallID}) of |
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[#jingle_sip_session{direction = in, meta = Meta} = Session] -> |
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MetaWithoutInitStanza = maps:without([init_stanza], Meta), |
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Session2 = Session#jingle_sip_session{state = accepted, |
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meta = MetaWithoutInitStanza}, |
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mnesia:write(Session2); |
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_ -> |
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{error, not_found} |
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end. |
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set_outgoing_accepted(CallID) -> |
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:-( |
TFun = pa:bind(fun set_outgoing_accepted_tr/1, CallID), |
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run_transaction(TFun). |
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set_outgoing_accepted_tr(CallID) -> |
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:-( |
case mnesia:wread({jingle_sip_session, CallID}) of |
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[#jingle_sip_session{direction = out} = Session] -> |
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Session2 = Session#jingle_sip_session{state = accepted}, |
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mnesia:write(Session2); |
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_ -> |
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{error, not_found} |
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end. |
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-spec get_incoming_request(call_id(), jid:jid()) -> {ok, undefined | incoming_request()} | |
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{error, not_found}. |
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get_incoming_request(CallID, User) -> |
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UserUS = jid:to_lus(User), |
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case mnesia:dirty_read(jingle_sip_session, CallID) of |
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[#jingle_sip_session{request = ReqID, node = Node, owner = UserUS}] -> |
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{ok, {Node, ReqID}}; |
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_ -> |
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{error, not_found} |
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end. |
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-spec get_outgoing_handle(call_id(), jid:jid()) -> {ok, undefined | outgoing_handle()} | |
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{error, not_found}. |
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get_outgoing_handle(SID, User) -> |
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UserUS = jid:to_lus(User), |
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case mnesia:dirty_read(jingle_sip_session, SID) of |
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[#jingle_sip_session{dialog = Handle, owner = UserUS}] -> |
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{ok, Handle}; |
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_ -> |
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{error, not_found} |
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end. |
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-spec get_session_info(binary(), jid:jid()) -> |
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{ok, map()} | {error, any()}. |
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get_session_info(SID, User) -> |
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UserUS = jid:to_lus(User), |
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case mnesia:dirty_read(jingle_sip_session, SID) of |
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[#jingle_sip_session{sid = SID, |
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dialog = Handle, |
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request = Request, |
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state = State, |
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direction = Dir, |
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node = ONode, |
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owner = UserUS, |
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to = To, |
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from = From, |
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meta = Meta}] -> |
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{ok, #{sid => SID, |
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dialog => Handle, |
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request => Request, |
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state => State, |
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direction => Dir, |
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node => ONode, |
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from => From, |
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to => To, |
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meta => Meta}}; |
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{error, not_found} |
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end. |
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remove_session(CallID) -> |
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:-( |
mnesia:dirty_delete(jingle_sip_session, CallID). |