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xmpp.chapril.org-ejabberd/src/ejabberd_sm.erl

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%%%----------------------------------------------------------------------
%%% File : ejabberd_sm.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Session manager
%%% Created : 24 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2021 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).
-author('alexey@process-one.net').
-ifndef(GEN_SERVER).
-define(GEN_SERVER, gen_server).
-endif.
-behaviour(?GEN_SERVER).
%% API
-export([start_link/0,
stop/0,
route/1,
route/2,
open_session/5,
open_session/6,
close_session/4,
check_in_subscription/2,
bounce_offline_message/1,
bounce_sm_packet/1,
disconnect_removed_user/2,
get_user_resources/2,
get_user_present_resources/2,
set_presence/6,
unset_presence/5,
close_session_unset_presence/5,
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,
force_update_presence/1,
connected_users/0,
connected_users_number/0,
user_resources/2,
kick_user/2,
kick_user/3,
get_session_pid/3,
get_session_sid/3,
get_session_sids/2,
get_session_sids/3,
get_user_info/2,
get_user_info/3,
set_user_info/5,
del_user_info/4,
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,
host_up/1,
host_down/1,
make_sid/0,
clean_cache/1,
config_reloaded/0
]).
-export([init/1, handle_call/3, handle_cast/2,
handle_info/2, terminate/2, code_change/3]).
-include("logger.hrl").
-include_lib("xmpp/include/xmpp.hrl").
-include("ejabberd_commands.hrl").
-include("ejabberd_sm.hrl").
-include("ejabberd_stacktrace.hrl").
-include("translate.hrl").
-callback init() -> ok | {error, any()}.
-callback set_session(#session{}) -> ok | {error, any()}.
-callback delete_session(#session{}) -> ok | {error, any()}.
-callback get_sessions() -> [#session{}].
-callback get_sessions(binary()) -> [#session{}].
-callback get_sessions(binary(), binary()) -> {ok, [#session{}]} | {error, any()}.
-callback use_cache(binary()) -> boolean().
-callback cache_nodes(binary()) -> [node()].
-optional_callbacks([use_cache/1, cache_nodes/1]).
-record(state, {}).
%% default value for the maximum number of user connections
-define(MAX_USER_SESSIONS, infinity).
%%====================================================================
%% API
%%====================================================================
-export_type([sid/0, info/0]).
start_link() ->
?GEN_SERVER:start_link({local, ?MODULE}, ?MODULE, [], []).
-spec stop() -> ok.
stop() ->
_ = supervisor:terminate_child(ejabberd_sup, ?MODULE),
_ = supervisor:delete_child(ejabberd_sup, ?MODULE),
_ = supervisor:terminate_child(ejabberd_sup, ejabberd_c2s_sup),
_ = supervisor:delete_child(ejabberd_sup, ejabberd_c2s_sup),
ok.
-spec route(jid(), term()) -> ok.
%% @doc route arbitrary term to c2s process(es)
route(To, Term) ->
try do_route(To, Term), ok
catch ?EX_RULE(E, R, St) ->
StackTrace = ?EX_STACK(St),
?ERROR_MSG("Failed to route term to ~ts:~n"
"** Term = ~p~n"
"** ~ts",
[jid:encode(To), Term,
misc:format_exception(2, E, R, StackTrace)])
end.
-spec route(stanza()) -> ok.
route(Packet) ->
#jid{lserver = LServer} = xmpp:get_to(Packet),
case ejabberd_hooks:run_fold(sm_receive_packet, LServer, Packet, []) of
drop ->
?DEBUG("Hook dropped stanza:~n~ts", [xmpp:pp(Packet)]);
Packet1 ->
do_route(Packet1),
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),
Sessions = get_sessions(Mod, LUser, LServer, LResource),
Info = case lists:keyfind(SID, #session.sid, Sessions) of
#session{info = I} = Session ->
delete_session(Mod, Session),
I;
_ ->
[]
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(), presence()) -> boolean() | {stop, false}.
check_in_subscription(Acc, #presence{to = To}) ->
#jid{user = User, server = Server} = To,
case ejabberd_auth:user_exists(User, Server) of
true -> Acc;
false -> {stop, false}
end.
-spec bounce_offline_message({bounce, message()} | any()) -> any().
bounce_offline_message({bounce, #message{type = T}} = Acc)
when T == chat; T == groupchat; T == normal ->
bounce_sm_packet(Acc);
bounce_offline_message(Acc) ->
Acc.
-spec bounce_sm_packet({bounce | term(), stanza()}) -> any().
bounce_sm_packet({bounce, Packet} = Acc) ->
Lang = xmpp:get_lang(Packet),
Txt = ?T("User session not found"),
Err = xmpp:err_service_unavailable(Txt, Lang),
ejabberd_router:route_error(Packet, Err),
{stop, Acc};
bounce_sm_packet({_, Packet} = Acc) ->
?DEBUG("Dropping packet to unavailable resource:~n~ts",
[xmpp:pp(Packet)]),
Acc.
-spec disconnect_removed_user(binary(), binary()) -> ok.
disconnect_removed_user(User, Server) ->
route(jid:make(User, Server), {exit, ?T("User removed")}).
get_user_resources(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = get_sm_backend(LServer),
Ss = get_sessions(Mod, 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 = get_sessions(Mod, 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 get_sessions(Mod, 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 = get_sessions(Mod, LUser, LServer),
[{LResource, [{node, node(Pid)}, {ts, Ts}, {pid, Pid},
{priority, Priority} | Info]}
|| #session{usr = {_, _, LResource},
priority = Priority,
info = Info,
sid = {Ts, 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 get_sessions(Mod, LUser, LServer, LResource) of
[] ->
offline;
Ss ->
Session = lists:max(Ss),
{Ts, Pid} = Session#session.sid,
Node = node(Pid),
Priority = Session#session.priority,
[{node, Node}, {ts, Ts}, {pid, Pid}, {priority, Priority}
|Session#session.info]
end.
-spec set_user_info(binary(), binary(), binary(), atom(), term()) -> ok | {error, any()}.
set_user_info(User, Server, Resource, Key, Val) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] -> {error, notfound};
Ss ->
lists:foldl(
fun(#session{sid = {_, Pid},
info = Info} = Session, _) when Pid == self() ->
Info1 = lists:keystore(Key, 1, Info, {Key, Val}),
set_session(Session#session{info = Info1});
(_, Acc) ->
Acc
end, {error, not_owner}, Ss)
end.
-spec del_user_info(binary(), binary(), binary(), atom()) -> ok | {error, any()}.
del_user_info(User, Server, Resource, Key) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] -> {error, notfound};
Ss ->
lists:foldl(
fun(#session{sid = {_, Pid},
info = Info} = Session, _) when Pid == self() ->
Info1 = lists:keydelete(Key, 1, Info),
set_session(Session#session{info = Info1});
(_, Acc) ->
Acc
end, {error, not_owner}, Ss)
end.
-spec set_presence(sid(), binary(), binary(), binary(),
prio(), presence()) -> ok | {error, notfound}.
set_presence(SID, User, Server, Resource, Priority, Presence) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] -> {error, notfound};
Ss ->
case lists:keyfind(SID, #session.sid, Ss) of
#session{info = Info} ->
set_session(SID, User, Server, Resource, Priority, Info),
ejabberd_hooks:run(set_presence_hook,
LServer,
[User, Server, Resource, Presence]);
false ->
{error, notfound}
end
end.
-spec unset_presence(sid(), binary(), binary(),
binary(), binary()) -> ok | {error, notfound}.
unset_presence(SID, User, Server, Resource, Status) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] -> {error, notfound};
Ss ->
case lists:keyfind(SID, #session.sid, Ss) of
#session{info = Info} ->
set_session(SID, User, Server, Resource, undefined, Info),
ejabberd_hooks:run(unset_presence_hook,
LServer,
[User, Server, Resource, Status]);
false ->
{error, notfound}
end
end.
-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) ->
case get_session_sid(User, Server, Resource) of
{_, PID} -> PID;
none -> none
end.
-spec get_session_sid(binary(), binary(), binary()) -> none | sid().
get_session_sid(User, Server, Resource) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] ->
none;
Ss ->
#session{sid = SID} = lists:max(Ss),
SID
end.
-spec get_session_sids(binary(), binary()) -> [sid()].
get_session_sids(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = get_sm_backend(LServer),
Sessions = get_sessions(Mod, LUser, LServer),
[SID || #session{sid = SID} <- Sessions].
-spec get_session_sids(binary(), binary(), binary()) -> [sid()].
get_session_sids(User, Server, Resource) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
LResource = jid:resourceprep(Resource),
Mod = get_sm_backend(LServer),
Sessions = get_sessions(Mod, LUser, LServer, LResource),
[SID || #session{sid = SID} <- Sessions].
-spec dirty_get_sessions_list() -> [ljid()].
dirty_get_sessions_list() ->
lists:flatmap(
fun(Mod) ->
[S#session.usr || S <- get_sessions(Mod)]
end, get_sm_backends()).
-spec dirty_get_my_sessions_list() -> [#session{}].
dirty_get_my_sessions_list() ->
lists:flatmap(
fun(Mod) ->
[S || S <- get_sessions(Mod),
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 <- get_sessions(Mod, LServer)].
-spec get_all_pids() -> [pid()].
get_all_pids() ->
lists:flatmap(
fun(Mod) ->
[element(2, S#session.sid) || S <- get_sessions(Mod)]
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(get_sessions(Mod, LServer)).
c2s_handle_info(#{lang := Lang} = State, replaced) ->
State1 = State#{replaced => true},
Err = xmpp:serr_conflict(?T("Replaced by new connection"), Lang),
{stop, ejabberd_c2s:send(State1, Err)};
c2s_handle_info(#{lang := Lang} = State, kick) ->
Err = xmpp:serr_policy_violation(?T("has been kicked"), Lang),
{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.
-spec config_reloaded() -> ok.
config_reloaded() ->
init_cache().
%%====================================================================
%% gen_server callbacks
%%====================================================================
init([]) ->
process_flag(trap_exit, true),
init_cache(),
case lists:foldl(
fun(Mod, ok) -> Mod:init();
(_, Err) -> Err
end, ok, get_sm_backends()) of
ok ->
clean_cache(),
gen_iq_handler:start(?MODULE),
ejabberd_hooks:add(host_up, ?MODULE, host_up, 50),
ejabberd_hooks:add(host_down, ?MODULE, host_down, 60),
ejabberd_hooks:add(config_reloaded, ?MODULE, config_reloaded, 50),
lists:foreach(fun host_up/1, ejabberd_option:hosts()),
ejabberd_commands:register_commands(get_commands_spec()),
{ok, #state{}};
{error, Why} ->
{stop, Why}
end.
handle_call(Request, From, State) ->
?WARNING_MSG("Unexpected call from ~p: ~p", [From, Request]),
{noreply, State}.
handle_cast(Msg, State) ->
?WARNING_MSG("Unexpected cast: ~p", [Msg]),
{noreply, State}.
handle_info(Info, State) ->
?WARNING_MSG("Unexpected info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, _State) ->
lists:foreach(fun host_down/1, ejabberd_option:hosts()),
ejabberd_hooks:delete(host_up, ?MODULE, host_up, 50),
ejabberd_hooks:delete(host_down, ?MODULE, host_down, 60),
ejabberd_hooks:delete(config_reloaded, ?MODULE, config_reloaded, 50),
ejabberd_commands:unregister_commands(get_commands_spec()),
ok.
code_change(_OldVsn, State, _Extra) -> {ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
-spec host_up(binary()) -> ok.
host_up(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(bounce_sm_packet, Host,
ejabberd_sm, bounce_sm_packet, 100),
ejabberd_hooks:add(remove_user, Host,
ejabberd_sm, disconnect_removed_user, 100),
ejabberd_c2s:host_up(Host).
-spec host_down(binary()) -> ok.
host_down(Host) ->
Mod = get_sm_backend(Host),
Err = case ejabberd_cluster:get_nodes() of
[Node] when Node == node() -> xmpp:serr_system_shutdown();
_ -> xmpp:serr_reset()
end,
lists:foreach(
fun(#session{sid = {_, Pid}}) when node(Pid) == node() ->
ejabberd_c2s:send(Pid, Err),
ejabberd_c2s:stop_async(Pid);
(_) ->
ok
end, get_sessions(Mod, 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(bounce_sm_packet, Host,
ejabberd_sm, bounce_sm_packet, 100),
ejabberd_hooks:delete(remove_user, Host,
ejabberd_sm, disconnect_removed_user, 100),
ejabberd_c2s:host_down(Host).
-spec set_session(sid(), binary(), binary(), binary(),
prio(), info()) -> ok | {error, any()}.
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},
set_session(#session{sid = SID, usr = USR, us = US,
priority = Priority, info = Info}).
-spec set_session(#session{}) -> ok | {error, any()}.
set_session(#session{us = {LUser, LServer}} = Session) ->
Mod = get_sm_backend(LServer),
case Mod:set_session(Session) of
ok ->
case use_cache(Mod, LServer) of
true ->
ets_cache:delete(?SM_CACHE, {LUser, LServer},
cache_nodes(Mod, LServer));
false ->
ok
end;
{error, _} = Err ->
Err
end.
-spec get_sessions(module()) -> [#session{}].
get_sessions(Mod) ->
delete_dead(Mod, Mod:get_sessions()).
-spec get_sessions(module(), binary()) -> [#session{}].
get_sessions(Mod, LServer) ->
delete_dead(Mod, Mod:get_sessions(LServer)).
-spec get_sessions(module(), binary(), binary()) -> [#session{}].
get_sessions(Mod, LUser, LServer) ->
case use_cache(Mod, LServer) of
true ->
case ets_cache:lookup(
?SM_CACHE, {LUser, LServer},
fun() ->
case Mod:get_sessions(LUser, LServer) of
{ok, Ss} when Ss /= [] ->
{ok, Ss};
_ ->
error
end
end) of
{ok, Sessions} ->
delete_dead(Mod, Sessions);
error ->
[]
end;
false ->
case Mod:get_sessions(LUser, LServer) of
{ok, Ss} -> delete_dead(Mod, Ss);
_ -> []
end
end.
-spec get_sessions(module(), binary(), binary(), binary()) -> [#session{}].
get_sessions(Mod, LUser, LServer, LResource) ->
Sessions = get_sessions(Mod, LUser, LServer),
[S || S <- Sessions, element(3, S#session.usr) == LResource].
-spec delete_session(module(), #session{}) -> ok.
delete_session(Mod, #session{usr = {LUser, LServer, _}} = Session) ->
Mod:delete_session(Session),
case use_cache(Mod, LServer) of
true ->
ets_cache:delete(?SM_CACHE, {LUser, LServer},
cache_nodes(Mod, LServer));
false ->
ok
end.
-spec delete_dead(module(), [#session{}]) -> [#session{}].
delete_dead(Mod, Sessions) ->
lists:filter(
fun(#session{sid = {_, Pid}} = Session) when node(Pid) == node() ->
case is_process_alive(Pid) of
true -> true;
false ->
delete_session(Mod, Session),
false
end;
(_) ->
true
end, Sessions).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-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 ~ts", [Term, jid:encode(To)]),
{U, S, R} = jid:tolower(To),
Mod = get_sm_backend(S),
case get_sessions(Mod, 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]),
ejabberd_c2s:route(Pid, Term)
end.
-spec do_route(stanza()) -> any().
do_route(#presence{to = To, type = T} = Packet)
when T == subscribe; T == subscribed; T == unsubscribe; T == unsubscribed ->
?DEBUG("Processing subscription:~n~ts", [xmpp:pp(Packet)]),
#jid{luser = LUser, lserver = LServer} = To,
case is_privacy_allow(Packet) andalso
ejabberd_hooks:run_fold(
roster_in_subscription,
LServer, false, [Packet]) 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),
Packet1 = Packet#presence{to = jid:replace_resource(To, R)},
?DEBUG("Sending to process ~p:~n~ts",
[Pid, xmpp:pp(Packet1)]),
ejabberd_c2s:route(Pid, {route, Packet1});
(_) ->
ok
end, get_sessions(Mod, LUser, LServer));
false ->
ok
end;
do_route(#presence{to = #jid{lresource = <<"">>} = To} = Packet) ->
?DEBUG("Processing presence to bare JID:~n~ts", [xmpp:pp(Packet)]),
{LUser, LServer, _} = jid:tolower(To),
lists:foreach(
fun({_, R}) ->
do_route(Packet#presence{to = jid:replace_resource(To, R)})
end, get_user_present_resources(LUser, LServer));
do_route(#message{to = #jid{lresource = <<"">>} = To, type = T} = Packet) ->
?DEBUG("Processing message to bare JID:~n~ts", [xmpp:pp(Packet)]),
if T == chat; T == headline; T == normal ->
route_message(Packet);
true ->
ejabberd_hooks:run_fold(bounce_sm_packet,
To#jid.lserver, {bounce, Packet}, [])
end;
do_route(#iq{to = #jid{lresource = <<"">>} = To, type = T} = Packet) ->
if T == set; T == get ->
?DEBUG("Processing IQ to bare JID:~n~ts", [xmpp:pp(Packet)]),
gen_iq_handler:handle(?MODULE, Packet);
true ->
ejabberd_hooks:run_fold(bounce_sm_packet,
To#jid.lserver, {pass, Packet}, [])
end;
do_route(Packet) ->
?DEBUG("Processing packet to full JID:~n~ts", [xmpp:pp(Packet)]),
To = xmpp:get_to(Packet),
{LUser, LServer, LResource} = jid:tolower(To),
Mod = get_sm_backend(LServer),
case get_sessions(Mod, LUser, LServer, LResource) of
[] ->
case Packet of
#message{type = T} when T == chat; T == normal ->
route_message(Packet);
#message{type = T} when T == headline ->
ejabberd_hooks:run_fold(bounce_sm_packet,
LServer, {pass, Packet}, []);
#presence{} ->
ejabberd_hooks:run_fold(bounce_sm_packet,
LServer, {pass, Packet}, []);
_ ->
ejabberd_hooks:run_fold(bounce_sm_packet,
LServer, {bounce, Packet}, [])
end;
Ss ->
Session = lists:max(Ss),
Pid = element(2, Session#session.sid),
?DEBUG("Sending to process ~p:~n~ts", [Pid, xmpp:pp(Packet)]),
ejabberd_c2s:route(Pid, {route, 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(stanza()) -> boolean().
is_privacy_allow(Packet) ->
To = xmpp:get_to(Packet),
LServer = To#jid.server,
allow == ejabberd_hooks:run_fold(
privacy_check_packet, LServer, allow,
[To, Packet, in]).
-spec route_message(message()) -> any().
route_message(#message{to = To, type = Type} = Packet) ->
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 get_sessions(Mod, 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),
ejabberd_c2s:route(Pid, {route, Packet1})
end;
%% Ignore other priority:
({_Prio, _Res}) -> ok
end,
PrioRes);
_ ->
case ejabberd_auth:user_exists(LUser, LServer) andalso
is_privacy_allow(Packet) of
true ->
ejabberd_hooks:run_fold(offline_message_hook,
LServer, {bounce, Packet}, []);
false ->
Err = xmpp:err_service_unavailable(),
ejabberd_router:route_error(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 = get_sessions(Mod, LUser, LServer, LResource),
if Ss == [] -> ok;
true ->
SIDs = [SID || #session{sid = SID} <- Ss],
MaxSID = lists:max(SIDs),
lists:foreach(fun ({_, Pid} = S) when S /= MaxSID ->
ejabberd_c2s:route(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 <- get_sessions(Mod, LUser, LServer, LResource)].
-spec check_max_sessions(binary(), binary()) -> ok | replaced.
check_max_sessions(LUser, LServer) ->
Mod = get_sm_backend(LServer),
Ss = get_sessions(Mod, LUser, LServer),
MaxSessions = get_max_user_sessions(LUser, LServer),
if length(Ss) =< MaxSessions -> ok;
true ->
#session{sid = {_, Pid}} = lists:min(Ss),
ejabberd_c2s:route(Pid, replaced)
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 ejabberd_shaper:match(Host, max_user_sessions,
jid:make(LUser, Host)) of
Max when is_integer(Max) -> Max;
infinity -> infinity;
_ -> ?MAX_USER_SESSIONS
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec force_update_presence({binary(), binary()}) -> ok.
force_update_presence({LUser, LServer}) ->
Mod = get_sm_backend(LServer),
Ss = get_sessions(Mod, LUser, LServer),
lists:foreach(fun (#session{sid = {_, Pid}}) ->
ejabberd_c2s:resend_presence(Pid)
end,
Ss).
-spec get_sm_backend(binary()) -> module().
get_sm_backend(Host) ->
DBType = ejabberd_option:sm_db_type(Host),
list_to_existing_atom("ejabberd_sm_" ++ atom_to_list(DBType)).
-spec get_sm_backends() -> [module()].
get_sm_backends() ->
lists:usort([get_sm_backend(Host) || Host <- ejabberd_option:hosts()]).
-spec get_vh_by_backend(module()) -> [binary()].
get_vh_by_backend(Mod) ->
lists:filter(
fun(Host) ->
get_sm_backend(Host) == Mod
end, ejabberd_option:hosts()).
%%--------------------------------------------------------------------
%%% Cache stuff
%%--------------------------------------------------------------------
-spec init_cache() -> ok.
init_cache() ->
case use_cache() of
true ->
ets_cache:new(?SM_CACHE, cache_opts());
false ->
ets_cache:delete(?SM_CACHE)
end.
-spec cache_opts() -> [proplists:property()].
cache_opts() ->
MaxSize = ejabberd_option:sm_cache_size(),
CacheMissed = ejabberd_option:sm_cache_missed(),
LifeTime = ejabberd_option:sm_cache_life_time(),
[{max_size, MaxSize}, {cache_missed, CacheMissed}, {life_time, LifeTime}].
-spec clean_cache(node()) -> non_neg_integer().
clean_cache(Node) ->
ets_cache:filter(
?SM_CACHE,
fun(_, error) ->
false;
(_, {ok, Ss}) ->
not lists:any(
fun(#session{sid = {_, Pid}}) ->
node(Pid) == Node
end, Ss)
end).
-spec clean_cache() -> ok.
clean_cache() ->
ejabberd_cluster:eval_everywhere(?MODULE, clean_cache, [node()]).
-spec use_cache(module(), binary()) -> boolean().
use_cache(Mod, LServer) ->
case erlang:function_exported(Mod, use_cache, 1) of
true -> Mod:use_cache(LServer);
false -> ejabberd_option:sm_use_cache(LServer)
end.
-spec use_cache() -> boolean().
use_cache() ->
lists:any(
fun(Host) ->
Mod = get_sm_backend(Host),
use_cache(Mod, Host)
end, ejabberd_option:hosts()).
-spec cache_nodes(module(), binary()) -> [node()].
cache_nodes(Mod, LServer) ->
case erlang:function_exported(Mod, cache_nodes, 1) of
true -> Mod:cache_nodes(LServer);
false -> ejabberd_cluster:get_nodes()
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% 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_desc = "List of users sessions",
result_example = [<<"user1@example.com">>, <<"user2@example.com">>],
result = {connected_users, {list, {sessions, string}}}},
#ejabberd_commands{name = connected_users_number, tags = [session, statistics],
desc = "Get the number of established sessions",
policy = admin,
module = ?MODULE, function = connected_users_number,
result_example = 2,
args = [], result = {num_sessions, integer}},
#ejabberd_commands{name = user_resources, tags = [session],
desc = "List user's connected resources",
policy = admin,
module = ?MODULE, function = user_resources,
args = [{user, binary}, {host, binary}],
args_desc = ["User name", "Server name"],
args_example = [<<"user1">>, <<"example.com">>],
result_example = [<<"tka1">>, <<"Gajim">>, <<"mobile-app">>],
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}],
args_desc = ["User name", "Server name"],
args_example = [<<"user1">>, <<"example.com">>],
result_desc = "Number of resources that were kicked",
result_example = 3,
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}) -> <<U/binary, $@, S/binary, $/, R/binary>> end,
SUSRs).
connected_users_number() ->
length(dirty_get_sessions_list()).
user_resources(User, Server) ->
Resources = get_user_resources(User, Server),
lists:sort(Resources).
-spec kick_user(binary(), binary()) -> non_neg_integer().
kick_user(User, Server) ->
Resources = get_user_resources(User, Server),
lists:foldl(
fun(Resource, Acc) ->
case kick_user(User, Server, Resource) of
false -> Acc;
true -> Acc + 1
end
end, 0, Resources).
-spec kick_user(binary(), binary(), binary()) -> boolean().
kick_user(User, Server, Resource) ->
case get_session_pid(User, Server, Resource) of
none -> false;
Pid -> ejabberd_c2s:route(Pid, kick)
end.
make_sid() ->
{misc:unique_timestamp(), self()}.
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