mirror of
https://github.com/processone/ejabberd.git
synced 2024-12-20 17:27:00 +01:00
145 lines
3.4 KiB
Erlang
145 lines
3.4 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_router.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : Main router
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%%% Created : 27 Nov 2002 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(ejabberd_router).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-export([route/3,
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register_route/1,
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unregister_route/1,
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dirty_get_all_routes/0,
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dirty_get_all_domains/0
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]).
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-export([start_link/0, init/0]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-record(route, {domain, pid}).
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start_link() ->
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Pid = proc_lib:spawn_link(ejabberd_router, init, []),
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register(ejabberd_router, Pid),
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{ok, Pid}.
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init() ->
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update_tables(),
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mnesia:create_table(route,
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[{ram_copies, [node()]},
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{type, bag},
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{attributes,
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record_info(fields, route)}]),
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mnesia:add_table_copy(route, node(), ram_copies),
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mnesia:subscribe({table, route, simple}),
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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~nwhen processing: ~p",
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[Reason, {From, To, Packet}]);
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_ ->
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ok
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end,
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loop();
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{register_route, Domain, Pid} ->
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F = fun() ->
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mnesia:write(#route{domain = Domain,
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pid = Pid})
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end,
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mnesia:transaction(F),
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loop();
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{unregister_route, Domain, Pid} ->
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F = fun() ->
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mnesia:delete_object(#route{domain = Domain,
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pid = Pid})
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end,
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mnesia:transaction(F),
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loop();
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{mnesia_table_event, {write, #route{pid = Pid}, _ActivityId}} ->
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erlang:monitor(process, Pid),
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loop();
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{'DOWN', _Ref, _Type, Pid, _Info} ->
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F = fun() ->
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Es = mnesia:select(
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route,
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[{#route{pid = Pid, _ = '_'},
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[],
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['$_']}]),
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lists:foreach(fun(E) ->
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mnesia:delete_object(E)
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end, Es)
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end,
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mnesia:transaction(F),
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loop();
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_ ->
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loop()
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end.
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do_route(From, To, Packet) ->
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?DEBUG("route~n\tfrom ~p~n\tto ~p~n\tpacket ~p~n", [From, To, Packet]),
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LDstDomain = To#jid.lserver,
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case mnesia:dirty_read(route, LDstDomain) of
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[] ->
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ejabberd_s2s ! {route, From, To, Packet};
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[R] ->
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Pid = R#route.pid,
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?DEBUG("routed to process ~p~n", [Pid]),
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Pid ! {route, From, To, Packet};
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Rs ->
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Rs1 = case [R || R <- Rs, node(R#route.pid) == node()] of
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[] -> Rs;
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LRs -> LRs
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end,
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R = lists:nth(erlang:phash(now(), length(Rs1)), Rs1),
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Pid = R#route.pid,
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?DEBUG("routed to process ~p~n", [Pid]),
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Pid ! {route, From, To, Packet}
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end.
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route(From, To, Packet) ->
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ejabberd_router ! {route, From, To, Packet}.
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register_route(Domain) ->
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ejabberd_router ! {register_route, Domain, self()}.
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unregister_route(Domain) ->
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ejabberd_router ! {unregister_route, Domain, self()}.
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dirty_get_all_routes() ->
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lists:delete(?MYNAME, lists:usort(mnesia:dirty_all_keys(route))).
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dirty_get_all_domains() ->
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lists:usort(mnesia:dirty_all_keys(route)).
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update_tables() ->
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case catch mnesia:table_info(route, attributes) of
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[domain, node, pid] ->
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mnesia:delete_table(route);
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[domain, pid] ->
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ok;
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{'EXIT', _} ->
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ok
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end,
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case lists:member(local_route, mnesia:system_info(tables)) of
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true ->
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mnesia:delete_table(local_route);
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false ->
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ok
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end.
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