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

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%%%----------------------------------------------------------------------
%%% File : ejabberd_socket.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Socket with zlib and TLS support library
%%% Created : 23 Aug 2006 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(ejabberd_socket).
-author('alexey@process-one.net').
%% API
-export([init/0, start/4, connect/3, connect/4, starttls/2,
starttls/3, compress/1, compress/2, reset_stream/1,
send/2, send_xml/2, change_shaper/2, monitor/1,
get_sockmod/1, get_peer_certificate/1, get_conn_type/1,
get_verify_result/1, close/1, change_controller/2,
change_socket/2, sockname/1, peername/1, is_remote_receiver/1]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("jlib.hrl").
-type sockmod() :: ejabberd_http_poll | ejabberd_bosh |
ejabberd_http_bind | ejabberd_http_bindjson |
ejabberd_http_ws | ejabberd_http_wsjson |
gen_tcp | tls | ezlib.
-type receiver() :: pid () | atom().
-type socket() :: pid() | inet:socket() |
tls:tls_socket() |
ezlib:zlib_socket() |
ejabberd_bosh:bosh_socket() |
ejabberd_http_ws:ws_socket() |
ejabberd_http_poll:poll_socket().
-record(socket_state, {sockmod = gen_tcp :: sockmod(),
socket = self() :: socket(),
receiver = self() :: receiver()}).
-type socket_state() :: #socket_state{}.
-export_type([socket_state/0, sockmod/0]).
-spec start(atom(), sockmod(), socket(), [{atom(), any()}]) -> any().
init() -> #socket_state{}.
start(Module, SockMod, Socket, Opts) ->
case Module:socket_type() of
xml_stream ->
MaxStanzaSize = case lists:keysearch(max_stanza_size, 1,
Opts)
of
{value, {_, Size}} -> Size;
_ -> infinity
end,
{ReceiverMod, Receiver, RecRef} = case catch
SockMod:custom_receiver(Socket)
of
{receiver, RecMod, RecPid} ->
{RecMod, RecPid, RecMod};
_ ->
RecPid =
ejabberd_receiver:start(Socket,
SockMod,
none,
MaxStanzaSize),
{ejabberd_receiver, RecPid,
RecPid}
end,
SocketData = #socket_state{sockmod = SockMod,
socket = Socket, receiver = RecRef},
case Module:start({?MODULE, SocketData}, Opts) of
{ok, Pid} ->
case SockMod:controlling_process(Socket, Receiver) of
ok -> ok;
{error, _Reason} -> SockMod:close(Socket)
end,
ReceiverMod:become_controller(Receiver, Pid);
{error, _Reason} ->
SockMod:close(Socket),
case ReceiverMod of
ejabberd_receiver -> ReceiverMod:close(Receiver);
_ -> ok
end
end;
independent -> ok;
raw ->
case Module:start({SockMod, Socket}, Opts) of
{ok, Pid} ->
case SockMod:controlling_process(Socket, Pid) of
ok -> ok;
{error, _Reason} -> SockMod:close(Socket)
end;
{error, _Reason} -> SockMod:close(Socket)
end
end.
connect(Addr, Port, Opts) ->
connect(Addr, Port, Opts, infinity).
connect(Addr, Port, Opts, Timeout) ->
case gen_tcp:connect(Addr, Port, Opts, Timeout) of
{ok, Socket} ->
Receiver = ejabberd_receiver:start(Socket, gen_tcp,
none),
SocketData = #socket_state{sockmod = gen_tcp,
socket = Socket, receiver = Receiver},
Pid = self(),
case gen_tcp:controlling_process(Socket, Receiver) of
ok ->
ejabberd_receiver:become_controller(Receiver, Pid),
{ok, SocketData};
{error, _Reason} = Error -> gen_tcp:close(Socket), Error
end;
{error, _Reason} = Error -> Error
end.
starttls(SocketData, TLSOpts) ->
starttls(SocketData, TLSOpts, undefined).
starttls(SocketData, TLSOpts, Data) ->
{ok, TLSSocket} =
ejabberd_receiver:starttls(SocketData#socket_state.receiver,
TLSOpts, Data),
SocketData#socket_state{socket = TLSSocket,
sockmod = tls}.
compress(SocketData) -> compress(SocketData, undefined).
compress(SocketData, Data) ->
{ok, ZlibSocket} =
ejabberd_receiver:compress(SocketData#socket_state.receiver,
Data),
SocketData#socket_state{socket = ZlibSocket,
sockmod = ezlib}.
reset_stream(SocketData)
when is_pid(SocketData#socket_state.receiver) ->
ejabberd_receiver:reset_stream(SocketData#socket_state.receiver);
reset_stream(SocketData)
when is_atom(SocketData#socket_state.receiver) ->
(SocketData#socket_state.receiver):reset_stream(SocketData#socket_state.socket).
change_controller(#socket_state{receiver = Recv}, Pid)
when is_pid(Recv) ->
ejabberd_receiver:setopts(Recv, [{active, false}]),
sync_events(Pid),
ejabberd_receiver:change_controller(Recv, Pid);
change_controller(#socket_state{socket = Socket,
receiver = Mod},
Pid) ->
Mod:setopts(Socket, [{active, false}]),
sync_events(Pid),
Mod:change_controller(Socket, Pid).
change_socket(SocketData, Socket) ->
SocketData#socket_state{socket = Socket}.
-spec send(socket_state(), iodata()) -> ok.
send(SocketData, Data) ->
Res = if node(SocketData#socket_state.receiver) ==
node() ->
catch
(SocketData#socket_state.sockmod):send(SocketData#socket_state.socket,
Data);
true ->
catch
ejabberd_receiver:send(SocketData#socket_state.receiver,
Data)
end,
case Res of
ok -> ok;
{error, timeout} ->
?INFO_MSG("Timeout on ~p:send",
[SocketData#socket_state.sockmod]),
exit(normal);
Error ->
?DEBUG("Error in ~p:send: ~p",
[SocketData#socket_state.sockmod, Error]),
exit(normal)
end.
-spec send_xml(socket_state(), xmlel()) -> any().
send_xml(SocketData, Data) ->
catch
(SocketData#socket_state.sockmod):send_xml(SocketData#socket_state.socket,
Data).
change_shaper(SocketData, Shaper)
when is_pid(SocketData#socket_state.receiver) ->
ejabberd_receiver:change_shaper(SocketData#socket_state.receiver,
Shaper);
change_shaper(SocketData, Shaper)
when is_atom(SocketData#socket_state.receiver) ->
(SocketData#socket_state.receiver):change_shaper(SocketData#socket_state.socket,
Shaper).
monitor(SocketData)
when is_pid(SocketData#socket_state.receiver) ->
erlang:monitor(process,
SocketData#socket_state.receiver);
monitor(SocketData)
when is_atom(SocketData#socket_state.receiver) ->
(SocketData#socket_state.receiver):monitor(SocketData#socket_state.socket).
get_sockmod(SocketData) ->
SocketData#socket_state.sockmod.
get_peer_certificate(SocketData) ->
tls:get_peer_certificate(SocketData#socket_state.socket).
get_verify_result(SocketData) ->
tls:get_verify_result(SocketData#socket_state.socket).
close(SocketData) ->
ejabberd_receiver:close(SocketData#socket_state.receiver).
sockname(#socket_state{sockmod = SockMod,
socket = Socket}) ->
case SockMod of
gen_tcp -> inet:sockname(Socket);
_ -> SockMod:sockname(Socket)
end.
peername(#socket_state{sockmod = SockMod,
socket = Socket}) ->
case SockMod of
gen_tcp -> inet:peername(Socket);
_ -> SockMod:peername(Socket)
end.
get_conn_type(#socket_state{sockmod = SockMod, socket = Socket}) ->
case SockMod of
gen_tcp -> c2s;
tls -> c2s_tls;
ezlib ->
case ezlib:get_sockmod(Socket) of
gen_tcp -> c2s_compressed;
tls -> c2s_compressed_tls
end;
ejabberd_http_poll -> http_poll;
ejabberd_http_ws -> http_ws;
ejabberd_http_bind -> http_bind;
ejabberd_bosh -> http_bind;
ejabberd_http_bindjson -> http_bindjson;
ejabberd_http_wsjson -> http_wsjson
end.
-spec is_remote_receiver(socket_state()) -> boolean().
is_remote_receiver(#socket_state{receiver = Pid}) when is_pid(Pid) ->
node(Pid) /= node();
is_remote_receiver(_) ->
false.
sync_events(C2SPid) ->
receive
{'$gen_event', El} = Event
when element(1, El) == xmlel;
element(1, El) == xmlstreamstart;
element(1, El) == xmlstreamelement;
element(1, El) == xmlstreamend;
element(1, El) == xmlstreamerror ->
C2SPid ! Event, sync_events(C2SPid);
closed -> C2SPid ! closed, sync_events(C2SPid)
after 0 -> ok
end.
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