%%%----------------------------------------------------------------------
%%% 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) 2002-2008 Process-one
%%%
%%% 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([start/4,
connect/3,
starttls/2,
starttls/3,
compress/1,
compress/2,
reset_stream/1,
send/2,
change_shaper/2,
monitor/1,
get_sockmod/1,
get_peer_certificate/1,
get_verify_result/1,
close/1,
sockname/1, peername/1]).
-record(socket_state, {sockmod, socket, receiver}).
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% Function:
%% Description:
%%--------------------------------------------------------------------
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,
Receiver = ejabberd_receiver:start(Socket, SockMod, none, MaxStanzaSize),
SocketData = #socket_state{sockmod = SockMod,
socket = Socket,
receiver = Receiver},
case Module:start({?MODULE, SocketData}, Opts) of
{ok, Pid} ->
case SockMod:controlling_process(Socket, Receiver) of
ok ->
ok;
{error, _Reason} ->
SockMod:close(Socket)
end,
ejabberd_receiver:become_controller(Receiver, Pid);
{error, _Reason} ->
SockMod:close(Socket)
end;
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) ->
case gen_tcp:connect(Addr, Port, Opts) 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) ->
{ok, TLSSocket} = tls:tcp_to_tls(SocketData#socket_state.socket, TLSOpts),
ejabberd_receiver:starttls(SocketData#socket_state.receiver, TLSSocket),
SocketData#socket_state{socket = TLSSocket, sockmod = tls}.
starttls(SocketData, TLSOpts, Data) ->
{ok, TLSSocket} = tls:tcp_to_tls(SocketData#socket_state.socket, TLSOpts),
ejabberd_receiver:starttls(SocketData#socket_state.receiver, TLSSocket),
send(SocketData, Data),
SocketData#socket_state{socket = TLSSocket, sockmod = tls}.
compress(SocketData) ->
{ok, ZlibSocket} = ejabberd_zlib:enable_zlib(
SocketData#socket_state.sockmod,
SocketData#socket_state.socket),
ejabberd_receiver:compress(SocketData#socket_state.receiver, ZlibSocket),
SocketData#socket_state{socket = ZlibSocket, sockmod = ejabberd_zlib}.
compress(SocketData, Data) ->
{ok, ZlibSocket} = ejabberd_zlib:enable_zlib(
SocketData#socket_state.sockmod,
SocketData#socket_state.socket),
ejabberd_receiver:compress(SocketData#socket_state.receiver, ZlibSocket),
send(SocketData, Data),
SocketData#socket_state{socket = ZlibSocket, sockmod = ejabberd_zlib}.
reset_stream(SocketData) ->
ejabberd_receiver:reset_stream(SocketData#socket_state.receiver).
send(SocketData, Data) ->
catch (SocketData#socket_state.sockmod):send(
SocketData#socket_state.socket, Data).
change_shaper(SocketData, Shaper) ->
ejabberd_receiver:change_shaper(SocketData#socket_state.receiver, Shaper).
monitor(SocketData) ->
erlang:monitor(process, SocketData#socket_state.receiver).
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.
%%====================================================================
%% Internal functions
%%====================================================================
