%%%---------------------------------------------------------------------- %%% File : ejabberd_sm.erl %%% Author : Alexey Shchepin %%% Purpose : Session manager %%% Created : 24 Nov 2002 by Alexey Shchepin %%% %%% %%% ejabberd, Copyright (C) 2002-2017 ProcessOne %%% %%% This program is free software; you can redistribute it and/or %%% modify it under the terms of the GNU General Public License as %%% published by the Free Software Foundation; either version 2 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 General Public License along %%% with this program; if not, write to the Free Software Foundation, Inc., %%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. %%% %%%---------------------------------------------------------------------- -module(ejabberd_sm). -behaviour(ejabberd_config). -author('alexey@process-one.net'). -behaviour(gen_server). %% API -export([start/0, start_link/0, route/2, route/3, process_iq/3, open_session/5, open_session/6, close_session/4, check_in_subscription/6, bounce_offline_message/4, disconnect_removed_user/2, get_user_resources/2, get_user_present_resources/2, set_presence/7, unset_presence/6, close_session_unset_presence/5, set_offline_info/5, get_offline_info/4, dirty_get_sessions_list/0, dirty_get_my_sessions_list/0, get_vh_session_list/1, get_vh_session_number/1, get_vh_by_backend/1, register_iq_handler/4, register_iq_handler/5, unregister_iq_handler/2, force_update_presence/1, connected_users/0, connected_users_number/0, user_resources/2, kick_user/2, get_session_pid/3, get_user_info/2, get_user_info/3, get_user_ip/3, get_max_user_sessions/2, get_all_pids/0, is_existing_resource/3, get_commands_spec/0, c2s_handle_info/2, make_sid/0 ]). -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3, opt_type/1]). -include("ejabberd.hrl"). -include("logger.hrl"). -include("xmpp.hrl"). -include("ejabberd_commands.hrl"). -include("ejabberd_sm.hrl"). -callback init() -> ok | {error, any()}. -callback set_session(#session{}) -> ok. -callback delete_session(binary(), binary(), binary(), sid()) -> {ok, #session{}} | {error, notfound}. -callback get_sessions() -> [#session{}]. -callback get_sessions(binary()) -> [#session{}]. -callback get_sessions(binary(), binary()) -> [#session{}]. -callback get_sessions(binary(), binary(), binary()) -> [#session{}]. -record(state, {}). %% default value for the maximum number of user connections -define(MAX_USER_SESSIONS, infinity). %%==================================================================== %% API %%==================================================================== -export_type([sid/0, info/0]). start() -> ChildSpec = {?MODULE, {?MODULE, start_link, []}, transient, 1000, worker, [?MODULE]}, supervisor:start_child(ejabberd_sup, ChildSpec). start_link() -> gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). -spec route(jid(), term()) -> ok. %% @doc route arbitrary term to c2s process(es) route(To, Term) -> case catch do_route(To, Term) of {'EXIT', Reason} -> ?ERROR_MSG("route ~p to ~p failed: ~p", [Term, To, Reason]); _ -> ok end. -spec route(jid(), jid(), stanza()) -> ok. route(From, To, Packet) -> case catch do_route(From, To, Packet) of {'EXIT', Reason} -> ?ERROR_MSG("~p~nwhen processing: ~p", [Reason, {From, To, Packet}]); _ -> ok end. -spec open_session(sid(), binary(), binary(), binary(), prio(), info()) -> ok. open_session(SID, User, Server, Resource, Priority, Info) -> set_session(SID, User, Server, Resource, Priority, Info), check_for_sessions_to_replace(User, Server, Resource), JID = jid:make(User, Server, Resource), ejabberd_hooks:run(sm_register_connection_hook, JID#jid.lserver, [SID, JID, Info]). -spec open_session(sid(), binary(), binary(), binary(), info()) -> ok. open_session(SID, User, Server, Resource, Info) -> open_session(SID, User, Server, Resource, undefined, Info). -spec close_session(sid(), binary(), binary(), binary()) -> ok. close_session(SID, User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), Info = case Mod:delete_session(LUser, LServer, LResource, SID) of {ok, #session{info = I}} -> I; {error, notfound} -> [] end, JID = jid:make(User, Server, Resource), ejabberd_hooks:run(sm_remove_connection_hook, JID#jid.lserver, [SID, JID, Info]). -spec check_in_subscription(boolean(), binary(), binary(), jid(), subscribe | subscribed | unsubscribe | unsubscribed, binary()) -> boolean() | {stop, false}. check_in_subscription(Acc, User, Server, _JID, _Type, _Reason) -> case ejabberd_auth:is_user_exists(User, Server) of true -> Acc; false -> {stop, false} end. -spec bounce_offline_message(bounce | any(), jid(), jid(), message()) -> stop. bounce_offline_message(bounce = Acc, From, To, Packet) -> Lang = xmpp:get_lang(Packet), Txt = <<"User session not found">>, Err = xmpp:err_service_unavailable(Txt, Lang), ejabberd_router:route_error(To, From, Packet, Err), {stop, Acc}; bounce_offline_message(Acc, _From, _To, _Packet) -> Acc. -spec disconnect_removed_user(binary(), binary()) -> ok. disconnect_removed_user(User, Server) -> route(jid:make(User, Server, <<"">>), {exit, <<"User removed">>}). get_user_resources(User, Server) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), Mod = get_sm_backend(LServer), Ss = online(Mod:get_sessions(LUser, LServer)), [element(3, S#session.usr) || S <- clean_session_list(Ss)]. -spec get_user_present_resources(binary(), binary()) -> [tuple()]. get_user_present_resources(LUser, LServer) -> Mod = get_sm_backend(LServer), Ss = online(Mod:get_sessions(LUser, LServer)), [{S#session.priority, element(3, S#session.usr)} || S <- clean_session_list(Ss), is_integer(S#session.priority)]. -spec get_user_ip(binary(), binary(), binary()) -> ip(). get_user_ip(User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), case online(Mod:get_sessions(LUser, LServer, LResource)) of [] -> undefined; Ss -> Session = lists:max(Ss), proplists:get_value(ip, Session#session.info) end. -spec get_user_info(binary(), binary()) -> [{binary(), info()}]. get_user_info(User, Server) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), Mod = get_sm_backend(LServer), Ss = online(Mod:get_sessions(LUser, LServer)), [{LResource, [{node, node(Pid)}|Info]} || #session{usr = {_, _, LResource}, info = Info, sid = {_, Pid}} <- clean_session_list(Ss)]. -spec get_user_info(binary(), binary(), binary()) -> info() | offline. get_user_info(User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), case online(Mod:get_sessions(LUser, LServer, LResource)) of [] -> offline; Ss -> Session = lists:max(Ss), Node = node(element(2, Session#session.sid)), [{node, Node}|Session#session.info] end. -spec set_presence(sid(), binary(), binary(), binary(), prio(), presence(), info()) -> ok. set_presence(SID, User, Server, Resource, Priority, Presence, Info) -> set_session(SID, User, Server, Resource, Priority, Info), ejabberd_hooks:run(set_presence_hook, jid:nameprep(Server), [User, Server, Resource, Presence]). -spec unset_presence(sid(), binary(), binary(), binary(), binary(), info()) -> ok. unset_presence(SID, User, Server, Resource, Status, Info) -> set_session(SID, User, Server, Resource, undefined, Info), ejabberd_hooks:run(unset_presence_hook, jid:nameprep(Server), [User, Server, Resource, Status]). -spec close_session_unset_presence(sid(), binary(), binary(), binary(), binary()) -> ok. close_session_unset_presence(SID, User, Server, Resource, Status) -> close_session(SID, User, Server, Resource), ejabberd_hooks:run(unset_presence_hook, jid:nameprep(Server), [User, Server, Resource, Status]). -spec get_session_pid(binary(), binary(), binary()) -> none | pid(). get_session_pid(User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), case online(Mod:get_sessions(LUser, LServer, LResource)) of [#session{sid = {_, Pid}}] -> Pid; _ -> none end. -spec set_offline_info(sid(), binary(), binary(), binary(), info()) -> ok. set_offline_info(SID, User, Server, Resource, Info) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), set_session(SID, LUser, LServer, LResource, undefined, [offline | Info]). -spec get_offline_info(erlang:timestamp(), binary(), binary(), binary()) -> none | info(). get_offline_info(Time, User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), case Mod:get_sessions(LUser, LServer, LResource) of [#session{sid = {Time, _}, info = Info}] -> case proplists:get_bool(offline, Info) of true -> Info; false -> none end; _ -> none end. -spec dirty_get_sessions_list() -> [ljid()]. dirty_get_sessions_list() -> lists:flatmap( fun(Mod) -> [S#session.usr || S <- online(Mod:get_sessions())] end, get_sm_backends()). -spec dirty_get_my_sessions_list() -> [#session{}]. dirty_get_my_sessions_list() -> lists:flatmap( fun(Mod) -> [S || S <- online(Mod:get_sessions()), node(element(2, S#session.sid)) == node()] end, get_sm_backends()). -spec get_vh_session_list(binary()) -> [ljid()]. get_vh_session_list(Server) -> LServer = jid:nameprep(Server), Mod = get_sm_backend(LServer), [S#session.usr || S <- online(Mod:get_sessions(LServer))]. -spec get_all_pids() -> [pid()]. get_all_pids() -> lists:flatmap( fun(Mod) -> [element(2, S#session.sid) || S <- online(Mod:get_sessions())] end, get_sm_backends()). -spec get_vh_session_number(binary()) -> non_neg_integer(). get_vh_session_number(Server) -> LServer = jid:nameprep(Server), Mod = get_sm_backend(LServer), length(online(Mod:get_sessions(LServer))). register_iq_handler(Host, XMLNS, Module, Fun) -> ejabberd_sm ! {register_iq_handler, Host, XMLNS, Module, Fun}. -spec register_iq_handler(binary(), binary(), atom(), atom(), list()) -> any(). register_iq_handler(Host, XMLNS, Module, Fun, Opts) -> ejabberd_sm ! {register_iq_handler, Host, XMLNS, Module, Fun, Opts}. -spec unregister_iq_handler(binary(), binary()) -> any(). unregister_iq_handler(Host, XMLNS) -> ejabberd_sm ! {unregister_iq_handler, Host, XMLNS}. %% Why the hell do we have so many similar kicks? c2s_handle_info(#{lang := Lang} = State, replaced) -> State1 = State#{replaced => true}, Err = xmpp:serr_conflict(<<"Replaced by new connection">>, Lang), {stop, ejabberd_c2s:send(State1, Err)}; c2s_handle_info(#{lang := Lang} = State, kick) -> Err = xmpp:serr_policy_violation(<<"has been kicked">>, Lang), c2s_handle_info(State, {kick, kicked_by_admin, Err}); c2s_handle_info(State, {kick, _Reason, Err}) -> {stop, ejabberd_c2s:send(State, Err)}; c2s_handle_info(#{lang := Lang} = State, {exit, Reason}) -> Err = xmpp:serr_conflict(Reason, Lang), {stop, ejabberd_c2s:send(State, Err)}; c2s_handle_info(State, _) -> State. %%==================================================================== %% gen_server callbacks %%==================================================================== init([]) -> lists:foreach(fun(Mod) -> Mod:init() end, get_sm_backends()), ets:new(sm_iqtable, [named_table, public]), lists:foreach( fun(Host) -> ejabberd_hooks:add(c2s_handle_info, Host, ejabberd_sm, c2s_handle_info, 50), ejabberd_hooks:add(roster_in_subscription, Host, ejabberd_sm, check_in_subscription, 20), ejabberd_hooks:add(offline_message_hook, Host, ejabberd_sm, bounce_offline_message, 100), ejabberd_hooks:add(remove_user, Host, ejabberd_sm, disconnect_removed_user, 100), ejabberd_c2s:add_hooks(Host) end, ?MYHOSTS), ejabberd_commands:register_commands(get_commands_spec()), {ok, #state{}}. handle_call(_Request, _From, State) -> Reply = ok, {reply, Reply, State}. handle_cast(_Msg, State) -> {noreply, State}. handle_info({route, From, To, Packet}, State) -> case catch do_route(From, To, Packet) of {'EXIT', Reason} -> ?ERROR_MSG("~p~nwhen processing: ~p", [Reason, {From, To, Packet}]); _ -> ok end, {noreply, State}; handle_info({register_iq_handler, Host, XMLNS, Module, Function}, State) -> ets:insert(sm_iqtable, {{Host, XMLNS}, Module, Function}), {noreply, State}; handle_info({register_iq_handler, Host, XMLNS, Module, Function, Opts}, State) -> ets:insert(sm_iqtable, {{Host, XMLNS}, Module, Function, Opts}), {noreply, State}; handle_info({unregister_iq_handler, Host, XMLNS}, State) -> case ets:lookup(sm_iqtable, {Host, XMLNS}) of [{_, Module, Function, Opts}] -> gen_iq_handler:stop_iq_handler(Module, Function, Opts); _ -> ok end, ets:delete(sm_iqtable, {Host, XMLNS}), {noreply, State}; handle_info(_Info, State) -> {noreply, State}. terminate(_Reason, _State) -> lists:foreach( fun(Host) -> ejabberd_hooks:delete(c2s_handle_info, Host, ejabberd_sm, c2s_handle_info, 50), ejabberd_hooks:delete(roster_in_subscription, Host, ejabberd_sm, check_in_subscription, 20), ejabberd_hooks:delete(offline_message_hook, Host, ejabberd_sm, bounce_offline_message, 100), ejabberd_hooks:delete(remove_user, Host, ejabberd_sm, disconnect_removed_user, 100) end, ?MYHOSTS), ejabberd_commands:unregister_commands(get_commands_spec()), ok. code_change(_OldVsn, State, _Extra) -> {ok, State}. %%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- -spec set_session(sid(), binary(), binary(), binary(), prio(), info()) -> ok. set_session(SID, User, Server, Resource, Priority, Info) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), US = {LUser, LServer}, USR = {LUser, LServer, LResource}, Mod = get_sm_backend(LServer), Mod:set_session(#session{sid = SID, usr = USR, us = US, priority = Priority, info = Info}). -spec online([#session{}]) -> [#session{}]. online(Sessions) -> lists:filter(fun is_online/1, Sessions). -spec is_online(#session{}) -> boolean(). is_online(#session{info = Info}) -> not proplists:get_bool(offline, Info). %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -spec do_route(jid(), term()) -> any(). do_route(#jid{lresource = <<"">>} = To, Term) -> lists:foreach( fun(R) -> do_route(jid:replace_resource(To, R), Term) end, get_user_resources(To#jid.user, To#jid.server)); do_route(To, Term) -> ?DEBUG("broadcasting ~p to ~s", [Term, jid:to_string(To)]), {U, S, R} = jid:tolower(To), Mod = get_sm_backend(S), case online(Mod:get_sessions(U, S, R)) of [] -> ?DEBUG("dropping broadcast to unavailable resourse: ~p", [Term]); Ss -> Session = lists:max(Ss), Pid = element(2, Session#session.sid), ?DEBUG("sending to process ~p: ~p", [Pid, Term]), Pid ! Term end. -spec do_route(jid(), jid(), stanza()) -> any(). do_route(From, To, #presence{type = T, status = Status} = Packet) when T == subscribe; T == subscribed; T == unsubscribe; T == unsubscribed -> ?DEBUG("processing subscription:~n~s", [xmpp:pp(Packet)]), #jid{user = User, server = Server, luser = LUser, lserver = LServer} = To, Reason = if T == subscribe -> xmpp:get_text(Status); true -> <<"">> end, case is_privacy_allow(From, To, Packet) andalso ejabberd_hooks:run_fold( roster_in_subscription, LServer, false, [User, Server, From, T, Reason]) of true -> Mod = get_sm_backend(LServer), lists:foreach( fun(#session{sid = SID, usr = {_, _, R}, priority = Prio}) when is_integer(Prio) -> Pid = element(2, SID), ?DEBUG("sending to process ~p:~n~s", [Pid, xmpp:pp(Packet)]), Pid ! {route, From, jid:replace_resource(To, R), Packet}; (_) -> ok end, online(Mod:get_sessions(LUser, LServer))); false -> ok end; do_route(From, #jid{lresource = <<"">>} = To, #presence{} = Packet) -> ?DEBUG("processing presence to bare JID:~n~s", [xmpp:pp(Packet)]), {LUser, LServer, _} = jid:tolower(To), lists:foreach( fun({_, R}) -> do_route(From, jid:replace_resource(To, R), Packet) end, get_user_present_resources(LUser, LServer)); do_route(From, #jid{lresource = <<"">>} = To, #message{type = T} = Packet) -> ?DEBUG("processing message to bare JID:~n~s", [xmpp:pp(Packet)]), if T == chat; T == headline; T == normal; T == groupchat -> route_message(From, To, Packet, T); true -> Lang = xmpp:get_lang(Packet), ErrTxt = <<"User session not found">>, Err = xmpp:err_service_unavailable(ErrTxt, Lang), ejabberd_router:route_error(To, From, Packet, Err) end; do_route(From, #jid{lresource = <<"">>} = To, #iq{} = Packet) -> ?DEBUG("processing IQ to bare JID:~n~s", [xmpp:pp(Packet)]), process_iq(From, To, Packet); do_route(From, To, Packet) -> ?DEBUG("processing packet to full JID:~n~s", [xmpp:pp(Packet)]), {LUser, LServer, LResource} = jid:tolower(To), Mod = get_sm_backend(LServer), case online(Mod:get_sessions(LUser, LServer, LResource)) of [] -> case Packet of #message{type = T} when T == chat; T == normal; T == headline; T == groupchat -> route_message(From, To, Packet, T); #presence{} -> ?DEBUG("dropping presence to unavalable resource:~n~s", [xmpp:pp(Packet)]); _ -> Lang = xmpp:get_lang(Packet), ErrTxt = <<"User session not found">>, Err = xmpp:err_service_unavailable(ErrTxt, Lang), ejabberd_router:route_error(To, From, Packet, Err) end; Ss -> Session = lists:max(Ss), Pid = element(2, Session#session.sid), ?DEBUG("sending to process ~p:~n~s", [Pid, xmpp:pp(Packet)]), Pid ! {route, From, To, Packet} end. %% The default list applies to the user as a whole, %% and is processed if there is no active list set %% for the target session/resource to which a stanza is addressed, %% or if there are no current sessions for the user. -spec is_privacy_allow(jid(), jid(), stanza()) -> boolean(). is_privacy_allow(From, To, Packet) -> LServer = To#jid.server, allow == ejabberd_hooks:run_fold( privacy_check_packet, LServer, allow, [To, xmpp:set_from_to(Packet, From, To), in]). -spec route_message(jid(), jid(), message(), message_type()) -> any(). route_message(From, To, Packet, Type) -> LUser = To#jid.luser, LServer = To#jid.lserver, PrioRes = get_user_present_resources(LUser, LServer), case catch lists:max(PrioRes) of {MaxPrio, MaxRes} when is_integer(MaxPrio), MaxPrio >= 0 -> lists:foreach(fun ({P, R}) when P == MaxPrio; (P >= 0) and (Type == headline) -> LResource = jid:resourceprep(R), Mod = get_sm_backend(LServer), case online(Mod:get_sessions(LUser, LServer, LResource)) of [] -> ok; % Race condition Ss -> Session = lists:max(Ss), Pid = element(2, Session#session.sid), ?DEBUG("sending to process ~p~n", [Pid]), LMaxRes = jid:resourceprep(MaxRes), Packet1 = maybe_mark_as_copy(Packet, LResource, LMaxRes, P, MaxPrio), Pid ! {route, From, To, Packet1} end; %% Ignore other priority: ({_Prio, _Res}) -> ok end, PrioRes); _ -> case ejabberd_auth:is_user_exists(LUser, LServer) andalso is_privacy_allow(From, To, Packet) of true -> ejabberd_hooks:run_fold(offline_message_hook, LServer, bounce, [From, To, Packet]); false -> Err = xmpp:err_service_unavailable(), ejabberd_router:route_error(To, From, Packet, Err) end end. -spec maybe_mark_as_copy(message(), binary(), binary(), integer(), integer()) -> message(). maybe_mark_as_copy(Packet, R, R, P, P) -> Packet; maybe_mark_as_copy(Packet, _, _, P, P) -> xmpp:put_meta(Packet, sm_copy, true); maybe_mark_as_copy(Packet, _, _, _, _) -> Packet. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -spec clean_session_list([#session{}]) -> [#session{}]. clean_session_list(Ss) -> clean_session_list(lists:keysort(#session.usr, Ss), []). -spec clean_session_list([#session{}], [#session{}]) -> [#session{}]. clean_session_list([], Res) -> Res; clean_session_list([S], Res) -> [S | Res]; clean_session_list([S1, S2 | Rest], Res) -> if S1#session.usr == S2#session.usr -> if S1#session.sid > S2#session.sid -> clean_session_list([S1 | Rest], Res); true -> clean_session_list([S2 | Rest], Res) end; true -> clean_session_list([S2 | Rest], [S1 | Res]) end. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% On new session, check if some existing connections need to be replace -spec check_for_sessions_to_replace(binary(), binary(), binary()) -> ok | replaced. check_for_sessions_to_replace(User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), check_existing_resources(LUser, LServer, LResource), check_max_sessions(LUser, LServer). -spec check_existing_resources(binary(), binary(), binary()) -> ok. check_existing_resources(LUser, LServer, LResource) -> Mod = get_sm_backend(LServer), Ss = Mod:get_sessions(LUser, LServer, LResource), {OnlineSs, OfflineSs} = lists:partition(fun is_online/1, Ss), lists:foreach(fun(#session{sid = S}) -> Mod:delete_session(LUser, LServer, LResource, S) end, OfflineSs), if OnlineSs == [] -> ok; true -> SIDs = [SID || #session{sid = SID} <- OnlineSs], MaxSID = lists:max(SIDs), lists:foreach(fun ({_, Pid} = S) when S /= MaxSID -> Pid ! replaced; (_) -> ok end, SIDs) end. -spec is_existing_resource(binary(), binary(), binary()) -> boolean(). is_existing_resource(LUser, LServer, LResource) -> [] /= get_resource_sessions(LUser, LServer, LResource). -spec get_resource_sessions(binary(), binary(), binary()) -> [sid()]. get_resource_sessions(User, Server, Resource) -> LUser = jid:nodeprep(User), LServer = jid:nameprep(Server), LResource = jid:resourceprep(Resource), Mod = get_sm_backend(LServer), [S#session.sid || S <- online(Mod:get_sessions(LUser, LServer, LResource))]. -spec check_max_sessions(binary(), binary()) -> ok | replaced. check_max_sessions(LUser, LServer) -> Mod = get_sm_backend(LServer), Ss = Mod:get_sessions(LUser, LServer), {OnlineSs, OfflineSs} = lists:partition(fun is_online/1, Ss), MaxSessions = get_max_user_sessions(LUser, LServer), if length(OnlineSs) =< MaxSessions -> ok; true -> #session{sid = {_, Pid}} = lists:min(OnlineSs), Pid ! replaced end, if length(OfflineSs) =< MaxSessions -> ok; true -> #session{sid = SID, usr = {_, _, R}} = lists:min(OfflineSs), Mod:delete_session(LUser, LServer, R, SID) end. %% Get the user_max_session setting %% This option defines the max number of time a given users are allowed to %% log in %% Defaults to infinity -spec get_max_user_sessions(binary(), binary()) -> infinity | non_neg_integer(). get_max_user_sessions(LUser, Host) -> case acl:match_rule(Host, max_user_sessions, jid:make(LUser, Host, <<"">>)) of Max when is_integer(Max) -> Max; infinity -> infinity; _ -> ?MAX_USER_SESSIONS end. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -spec process_iq(jid(), jid(), iq()) -> any(). process_iq(From, To, #iq{type = T, lang = Lang, sub_els = [El]} = Packet) when T == get; T == set -> XMLNS = xmpp:get_ns(El), Host = To#jid.lserver, case ets:lookup(sm_iqtable, {Host, XMLNS}) of [{_, Module, Function}] -> gen_iq_handler:handle(Host, Module, Function, no_queue, From, To, Packet); [{_, Module, Function, Opts}] -> gen_iq_handler:handle(Host, Module, Function, Opts, From, To, Packet); [] -> Txt = <<"No module is handling this query">>, Err = xmpp:err_service_unavailable(Txt, Lang), ejabberd_router:route_error(To, From, Packet, Err) end; process_iq(From, To, #iq{type = T, lang = Lang, sub_els = SubEls} = Packet) when T == get; T == set -> Txt = case SubEls of [] -> <<"No child elements found">>; _ -> <<"Too many child elements">> end, Err = xmpp:err_bad_request(Txt, Lang), ejabberd_router:route_error(To, From, Packet, Err); process_iq(_From, _To, #iq{}) -> ok. -spec force_update_presence({binary(), binary()}) -> ok. force_update_presence({LUser, LServer}) -> Mod = get_sm_backend(LServer), Ss = online(Mod:get_sessions(LUser, LServer)), lists:foreach(fun (#session{sid = {_, Pid}}) -> Pid ! force_update_presence end, Ss). -spec get_sm_backend(binary()) -> module(). get_sm_backend(Host) -> DBType = case ejabberd_config:get_option( {sm_db_type, Host}, fun(T) -> ejabberd_config:v_db(?MODULE, T) end) of undefined -> ejabberd_config:default_ram_db(Host, ?MODULE); T -> T end, list_to_atom("ejabberd_sm_" ++ atom_to_list(DBType)). -spec get_sm_backends() -> [module()]. get_sm_backends() -> lists:usort([get_sm_backend(Host) || Host <- ?MYHOSTS]). -spec get_vh_by_backend(module()) -> [binary()]. get_vh_by_backend(Mod) -> lists:filter( fun(Host) -> get_sm_backend(Host) == Mod end, ?MYHOSTS). %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% ejabberd commands get_commands_spec() -> [#ejabberd_commands{name = connected_users, tags = [session], desc = "List all established sessions", policy = admin, module = ?MODULE, function = connected_users, args = [], result = {connected_users, {list, {sessions, string}}}}, #ejabberd_commands{name = connected_users_number, tags = [session, stats], desc = "Get the number of established sessions", policy = admin, module = ?MODULE, function = connected_users_number, args = [], result = {num_sessions, integer}}, #ejabberd_commands{name = user_resources, tags = [session], desc = "List user's connected resources", policy = user, module = ?MODULE, function = user_resources, args = [], result = {resources, {list, {resource, string}}}}, #ejabberd_commands{name = kick_user, tags = [session], desc = "Disconnect user's active sessions", module = ?MODULE, function = kick_user, args = [{user, binary}, {host, binary}], result = {num_resources, integer}}]. -spec connected_users() -> [binary()]. connected_users() -> USRs = dirty_get_sessions_list(), SUSRs = lists:sort(USRs), lists:map(fun ({U, S, R}) -> <> end, SUSRs). connected_users_number() -> length(dirty_get_sessions_list()). user_resources(User, Server) -> Resources = get_user_resources(User, Server), lists:sort(Resources). kick_user(User, Server) -> Resources = get_user_resources(User, Server), lists:foreach( fun(Resource) -> PID = get_session_pid(User, Server, Resource), PID ! kick end, Resources), length(Resources). make_sid() -> {p1_time_compat:unique_timestamp(), self()}. opt_type(sm_db_type) -> fun(T) -> ejabberd_config:v_db(?MODULE, T) end; opt_type(_) -> [sm_db_type].