mirror of
https://github.com/processone/ejabberd.git
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4413036585
* src/mod_roster.erl: Removed debugging code SVN Revision: 184
192 lines
4.1 KiB
Erlang
192 lines
4.1 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_s2s.erl
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%%% Author : Alexey Shchepin <alexey@sevcom.net>
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%%% Purpose : S2S connections manager
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%%% Created : 7 Dec 2002 by Alexey Shchepin <alexey@sevcom.net>
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%%% Id : $Id$
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%%%----------------------------------------------------------------------
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-module(ejabberd_s2s).
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-author('alexey@sevcom.net').
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-vsn('$Revision$ ').
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-export([start_link/0, init/0,
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have_connection/1,
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get_key/1,
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try_register/1,
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dirty_get_connections/0]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-record(s2s, {fromto, pid, key}).
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start_link() ->
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Pid = proc_lib:spawn_link(ejabberd_s2s, init, []),
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register(ejabberd_s2s, 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(s2s,[{ram_copies, [node()]},
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{attributes, record_info(fields, s2s)}]),
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mnesia:add_table_copy(s2s, node(), ram_copies),
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mnesia:subscribe(system),
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loop().
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loop() ->
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receive
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{closed_conection, FromTo} ->
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remove_connection(FromTo),
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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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{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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_ ->
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loop()
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end.
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remove_connection(FromTo) ->
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F = fun() ->
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mnesia:delete({s2s, FromTo})
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end,
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mnesia:transaction(F).
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clean_table_from_bad_node(Node) ->
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F = fun() ->
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Es = mnesia:select(
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s2s,
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[{#s2s{pid = '$1', _ = '_'},
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[{'==', {node, '$1'}, Node}],
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['$_']}]),
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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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have_connection(FromTo) ->
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case catch mnesia:dirty_read(s2s, FromTo) of
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[_] ->
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true;
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_ ->
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false
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end.
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get_key(FromTo) ->
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case catch mnesia:dirty_read(s2s, FromTo) of
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[E] ->
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E#s2s.key;
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_ ->
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error
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end.
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try_register(FromTo) ->
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Key = randoms:get_string(),
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F = fun() ->
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case mnesia:read({s2s, FromTo}) of
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[] ->
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mnesia:write(#s2s{fromto = FromTo,
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pid = self(),
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key = Key}),
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{key, Key};
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_ ->
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false
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end
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end,
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case mnesia:transaction(F) of
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{atomic, Res} ->
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Res;
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_ ->
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false
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end.
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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do_route(From, To, Packet) ->
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?DEBUG("s2s manager~n\tfrom ~p~n\tto ~p~n\tpacket ~P~n",
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[From, To, Packet, 8]),
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case find_connection(From, To) of
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{atomic, Pid} when pid(Pid) ->
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?DEBUG("sending to process ~p~n", [Pid]),
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% TODO
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{xmlelement, Name, Attrs, Els} = Packet,
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NewAttrs = jlib:replace_from_to_attrs(jlib:jid_to_string(From),
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jlib:jid_to_string(To),
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Attrs),
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send_element(Pid, {xmlelement, Name, NewAttrs, Els}),
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ok;
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{aborted, Reason} ->
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?DEBUG("delivery failed: ~p~n", [Reason]),
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false
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end.
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find_connection(From, To) ->
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#jid{lserver = MyServer} = From,
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#jid{lserver = Server} = To,
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FromTo = {MyServer, Server},
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case catch mnesia:dirty_read(s2s, FromTo) of
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{'EXIT', Reason} ->
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{aborted, Reason};
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[] ->
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?DEBUG("starting new s2s connection~n", []),
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Key = randoms:get_string(),
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{ok, Pid} = ejabberd_s2s_out:start(MyServer, Server, {new, Key}),
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F = fun() ->
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case mnesia:read({s2s, FromTo}) of
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[El] ->
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El#s2s.pid;
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[] ->
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mnesia:write(#s2s{fromto = FromTo,
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pid = Pid,
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key = Key}),
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Pid
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end
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end,
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mnesia:transaction(F);
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[El] ->
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{atomic, El#s2s.pid}
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end.
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send_element(Pid, El) ->
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Pid ! {send_element, El}.
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dirty_get_connections() ->
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mnesia:dirty_all_keys(s2s).
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update_tables() ->
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case catch mnesia:table_info(s2s, attributes) of
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[fromto, node, key] ->
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mnesia:transform_table(s2s, ignore, [fromto, pid, key]),
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mnesia:clear_table(s2s);
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[fromto, pid, key] ->
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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_s2s, mnesia:system_info(tables)) of
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true ->
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mnesia:delete_table(local_s2s);
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false ->
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ok
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end.
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