mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-30 16:36:29 +01:00
407 lines
10 KiB
Erlang
407 lines
10 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_sm.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose :
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%%% Created : 24 Nov 2002 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(ejabberd_sm).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-export([start_link/0, init/0, open_session/2, close_session/2,
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get_user_resources/1,
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set_presence/3,
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unset_presence/2,
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dirty_get_sessions_list/0,
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dirty_get_my_sessions_list/0,
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register_iq_handler/3,
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register_iq_handler/4,
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unregister_iq_handler/1
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]).
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-include_lib("mnemosyne/include/mnemosyne.hrl").
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-include("ejabberd.hrl").
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-record(session, {ur, user, node}).
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-record(local_session, {ur, pid}).
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-record(presence, {ur, user, priority}).
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start_link() ->
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{ok, proc_lib:spawn_link(ejabberd_sm, init, [])}.
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init() ->
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register(ejabberd_sm, self()),
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mnesia:create_table(session, [{ram_copies, [node()]},
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{attributes, record_info(fields, session)}]),
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mnesia:add_table_index(session, user),
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mnesia:add_table_index(session, node),
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mnesia:create_table(local_session,
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[{ram_copies, [node()]},
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{local_content, true},
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{attributes, record_info(fields, local_session)}]),
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mnesia:add_table_copy(local_session, node(), ram_copies),
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mnesia:create_table(presence,
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[{ram_copies, [node()]},
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{attributes, record_info(fields, presence)}]),
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mnesia:add_table_index(presence, user),
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mnesia:subscribe(system),
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ets:new(sm_iqtable, [named_table]),
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loop().
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loop() ->
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receive
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{route, From, To, Packet} ->
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case catch do_route(From, To, Packet) of
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{'EXIT', Reason} ->
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?ERROR_MSG("~p", [Reason]);
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_ ->
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ok
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end,
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loop();
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{open_session, User, Resource, From} ->
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replace_and_register_my_connection(User, Resource, From),
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replace_alien_connection(User, Resource),
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loop();
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{close_session, User, Resource} ->
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remove_connection(User, Resource),
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loop();
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{replace, User, Resource} ->
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replace_my_connection(User, Resource),
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loop();
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{mnesia_system_event, {mnesia_down, Node}} ->
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clean_table_from_bad_node(Node),
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loop();
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{register_iq_handler, XMLNS, Module, Function} ->
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ets:insert(sm_iqtable, {XMLNS, Module, Function}),
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loop();
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{register_iq_handler, XMLNS, Module, Function, Opts} ->
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ets:insert(sm_iqtable, {XMLNS, Module, Function, Opts}),
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loop();
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{unregister_iq_handler, XMLNS} ->
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case ets:lookup(sm_iqtable, XMLNS) of
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[{_, Module, Function, Opts}] ->
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gen_iq_handler:stop_iq_handler(Module, Function, Opts);
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_ ->
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ok
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end,
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ets:delete(sm_iqtable, XMLNS),
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mod_disco:unregister_feature(XMLNS),
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loop();
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_ ->
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loop()
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end.
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open_session(User, Resource) ->
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ejabberd_sm ! {open_session, User, Resource, self()}.
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close_session(User, Resource) ->
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ejabberd_sm ! {close_session, User, Resource}.
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replace_alien_connection(User, Resource) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {LUser, Resource},
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Es = mnesia:read({session, UR}),
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mnesia:write(#session{ur = UR, user = LUser, node = node()}),
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Es
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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lists:foreach(
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fun(R) ->
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if R#session.node /= node() ->
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{ejabberd_sm, R#session.node} !
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{replace, User, Resource};
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true ->
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ok
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end
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end, Rs);
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_ ->
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false
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end.
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replace_my_connection(User, Resource) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {LUser, Resource},
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Es = mnesia:read({local_session, UR}),
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mnesia:delete({local_session, UR}),
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Es
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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lists:foreach(
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fun(R) ->
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R#local_session.pid ! replaced
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end, Rs);
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_ ->
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false
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end.
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remove_connection(User, Resource) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {LUser, Resource},
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mnesia:delete({local_session, UR}),
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mnesia:delete({session, UR})
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end,
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mnesia:transaction(F).
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replace_and_register_my_connection(User, Resource, Pid) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {LUser, Resource},
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Es = mnesia:read({local_session, UR}),
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mnesia:write(#local_session{ur = UR, pid = Pid}),
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Es
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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lists:foreach(
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fun(R) ->
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R#local_session.pid ! replaced
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end, Rs);
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_ ->
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false
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end.
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clean_table_from_bad_node(Node) ->
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F = fun() ->
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Es = mnesia:index_read(session, Node, #session.node),
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lists:foreach(fun(E) ->
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mnesia:delete_object(session, E, write),
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mnesia:delete(
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{user_resource, E#session.ur})
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end, Es)
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end,
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mnesia:transaction(F).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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do_route(From, To, Packet) ->
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?DEBUG("session manager~n\tfrom ~p~n\tto ~p~n\tpacket ~P~n",
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[From, To, Packet, 8]),
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{User, Server, Resource} = To,
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{xmlelement, Name, Attrs, Els} = Packet,
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case Resource of
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"" ->
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% TODO
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case Name of
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"presence" ->
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{FU, FS, FR} = From,
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{Pass, Subsc} =
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case xml:get_attr_s("type", Attrs) of
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"subscribe" ->
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{mod_roster:in_subscription(User,
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{FU, FS, ""},
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subscribe),
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true};
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"subscribed" ->
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{mod_roster:in_subscription(User,
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{FU, FS, ""},
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subscribed),
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true};
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"unsubscribe" ->
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{mod_roster:in_subscription(User,
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{FU, FS, ""},
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unsubscribe),
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true};
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"unsubscribed" ->
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{mod_roster:in_subscription(User,
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{FU, FS, ""},
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unsubscribed),
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true};
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_ ->
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{true, false}
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end,
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if Pass ->
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LFrom = jlib:jid_tolower(From),
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LUser = jlib:tolower(User),
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LServer = jlib:tolower(Server),
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Resources = get_user_resources(User),
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if
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Resources /= [] ->
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lists:foreach(
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fun(R) ->
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if LFrom /=
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{LUser, LServer, R} ->
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ejabberd_sm !
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{route,
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From,
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{User, Server, R},
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Packet};
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true ->
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ok
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end
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end, Resources);
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true ->
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if
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Subsc ->
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mod_offline:store_packet(
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From, To, Packet);
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true ->
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ok
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end
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end;
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true ->
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ok
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end;
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"message" ->
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route_message(From, To, Packet);
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"iq" ->
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process_iq(From, To, Packet);
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"broadcast" ->
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lists:foreach(
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fun(R) ->
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ejabberd_sm ! {route,
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From,
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{User, Server, R},
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Packet}
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end, get_user_resources(User));
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_ ->
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ok
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end;
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_ ->
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LUR = {jlib:tolower(User), Resource},
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Sess = mnesia:dirty_read({session, LUR}),
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case Sess of
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[] ->
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if
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Name == "message" ->
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route_message(From, To, Packet);
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true ->
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?DEBUG("packet droped~n", [])
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end;
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[Ses] ->
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case mnesia:dirty_read({local_session, LUR}) of
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[] ->
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Node = Ses#session.node,
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?DEBUG("sending to node ~p~n", [Node]),
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{ejabberd_sm, Node} ! {route, From, To, Packet};
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[El] ->
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Pid = El#local_session.pid,
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?DEBUG("sending to process ~p~n", [Pid]),
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Pid ! {route, From, To, Packet}
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end
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end
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end.
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route_message(From, To, Packet) ->
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{User, Server, Resource} = To,
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case catch lists:max(get_user_present_resources(User)) of
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{'EXIT', _} ->
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case ejabberd_auth:is_user_exists(User) of
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true ->
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mod_offline:store_packet(From, To, Packet);
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_ ->
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?DEBUG("packet droped~n", [])
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end;
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{_, R} ->
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ejabberd_sm ! {route,
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From,
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{User, Server, R},
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Packet}
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end.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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get_user_resources(User) ->
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LUser = jlib:tolower(User),
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case catch mnesia:dirty_index_read(session, LUser, #session.user) of
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{'EXIT', Reason} ->
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[];
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Rs ->
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lists:map(fun(R) ->
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element(2, R#session.ur)
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end, Rs)
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end.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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set_presence(User, Resource, Priority) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {User, Resource},
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mnesia:write(#presence{ur = UR, user = LUser,
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priority = Priority})
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end,
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mnesia:transaction(F).
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unset_presence(User, Resource) ->
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LUser = jlib:tolower(User),
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F = fun() ->
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UR = {User, Resource},
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mnesia:delete({presence, UR})
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end,
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mnesia:transaction(F).
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get_user_present_resources(User) ->
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LUser = jlib:tolower(User),
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case catch mnesia:dirty_index_read(presence, LUser, #presence.user) of
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{'EXIT', Reason} ->
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[];
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Rs ->
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lists:map(fun(R) ->
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{R#presence.priority, element(2, R#presence.ur)}
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end, Rs)
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end.
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dirty_get_sessions_list() ->
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mnesia:dirty_all_keys(session).
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dirty_get_my_sessions_list() ->
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mnesia:dirty_all_keys(local_session).
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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process_iq(From, To, Packet) ->
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IQ = jlib:iq_query_info(Packet),
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case IQ of
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{iq, ID, Type, XMLNS, SubEl} ->
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case ets:lookup(sm_iqtable, XMLNS) of
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[{_, Module, Function}] ->
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ResIQ = apply(Module, Function, [From, To, IQ]),
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if
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ResIQ /= ignore ->
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ejabberd_router ! {route,
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To,
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From,
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jlib:iq_to_xml(ResIQ)};
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true ->
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ok
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end;
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[{_, Module, Function, Opts}] ->
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gen_iq_handler:handle(Module, Function, Opts,
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From, To, IQ);
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[] ->
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Err = jlib:make_error_reply(
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Packet, "501", "Not Implemented"),
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ejabberd_router ! {route, To, From, Err}
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end;
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reply ->
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ok;
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_ ->
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Err = jlib:make_error_reply(Packet, "400", "Bad Request"),
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ejabberd_router ! {route, To, From, Err},
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ok
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end.
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register_iq_handler(XMLNS, Module, Fun) ->
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ejabberd_sm ! {register_iq_handler, XMLNS, Module, Fun}.
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register_iq_handler(XMLNS, Module, Fun, Opts) ->
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ejabberd_sm ! {register_iq_handler, XMLNS, Module, Fun, Opts}.
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unregister_iq_handler(XMLNS) ->
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ejabberd_sm ! {unregister_iq_handler, XMLNS}.
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