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

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%%%-------------------------------------------------------------------
%%% File : ejabberd_frontend_socket.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Frontend socket with zlib and TLS support library
%%% Created : 23 Aug 2006 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2012 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_frontend_socket).
-author('alexey@process-one.net').
-behaviour(gen_server).
%% API
-export([start/4,
start_link/5,
%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,
setopts/2,
change_controller/2,
sockname/1, peername/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {sockmod, socket, receiver}).
-define(HIBERNATE_TIMEOUT, 90000).
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}
%% Description: Starts the server
%%--------------------------------------------------------------------
start_link(Module, SockMod, Socket, Opts, Receiver) ->
gen_server:start_link(?MODULE,
[Module, SockMod, Socket, Opts, Receiver], []).
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),
case SockMod:controlling_process(Socket, Receiver) of
ok ->
ok;
{error, _Reason} ->
SockMod:close(Socket)
end,
supervisor:start_child(ejabberd_frontend_socket_sup,
[Module, SockMod, Socket, Opts, Receiver]);
raw ->
%{ok, Pid} = Module:start({SockMod, Socket}, Opts),
%case SockMod:controlling_process(Socket, Pid) of
% ok ->
% ok;
% {error, _Reason} ->
% SockMod:close(Socket)
%end
todo
end.
starttls(FsmRef, TLSOpts) ->
starttls(FsmRef, TLSOpts, undefined).
starttls(FsmRef, TLSOpts, Data) ->
gen_server:call(FsmRef, {starttls, TLSOpts, Data}),
FsmRef.
compress(FsmRef) ->
compress(FsmRef, undefined).
compress(FsmRef, Data) ->
gen_server:call(FsmRef, {compress, Data}),
FsmRef.
reset_stream(FsmRef) ->
gen_server:call(FsmRef, reset_stream).
send(FsmRef, Data) ->
gen_server:call(FsmRef, {send, Data}).
change_shaper(FsmRef, Shaper) ->
gen_server:call(FsmRef, {change_shaper, Shaper}).
monitor(FsmRef) ->
erlang:monitor(process, FsmRef).
get_sockmod(FsmRef) ->
gen_server:call(FsmRef, get_sockmod).
get_peer_certificate(FsmRef) ->
gen_server:call(FsmRef, get_peer_certificate).
get_verify_result(FsmRef) ->
gen_server:call(FsmRef, get_verify_result).
close(FsmRef) ->
gen_server:call(FsmRef, close).
sockname(FsmRef) ->
gen_server:call(FsmRef, sockname).
setopts(FsmRef, Opts) ->
gen_server:call(FsmRef, {setopts, Opts}).
change_controller(FsmRef, C2SPid) ->
gen_server:call(FsmRef, {change_controller, C2SPid}).
peername(FsmRef) ->
gen_server:call(FsmRef, peername).
%%====================================================================
%% gen_server callbacks
%%====================================================================
%%--------------------------------------------------------------------
%% Function: init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% Description: Initiates the server
%%--------------------------------------------------------------------
init([Module, SockMod, Socket, Opts, Receiver]) ->
%% TODO: monitor the receiver
Node = ejabberd_node_groups:get_closest_node(backend),
IP = case peername(SockMod, Socket) of
{ok, IP1} ->
IP1;
_ ->
undefined
end,
{SockMod2, Socket2} = check_starttls(SockMod, Socket, Receiver, Opts),
{ok, Pid} =
rpc:call(Node, Module, start,
[{?MODULE, self()}, [{frontend_ip, IP} | Opts]]),
ejabberd_receiver:become_controller(Receiver, Pid),
{ok, #state{sockmod = SockMod2,
socket = Socket2,
receiver = Receiver}}.
%%--------------------------------------------------------------------
%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% Description: Handling call messages
%%--------------------------------------------------------------------
handle_call({starttls, TLSOpts, Data}, _From, State) ->
{ok, TLSSocket} = ejabberd_receiver:starttls(
State#state.receiver, TLSOpts, Data),
Reply = ok,
{reply, Reply, State#state{socket = TLSSocket, sockmod = tls},
?HIBERNATE_TIMEOUT};
handle_call({compress, Data}, _From, State) ->
{ok, ZlibSocket} = ejabberd_receiver:compress(
State#state.receiver, Data),
Reply = ok,
{reply, Reply, State#state{socket = ZlibSocket, sockmod = ejabberd_zlib},
?HIBERNATE_TIMEOUT};
handle_call(reset_stream, _From, State) ->
ejabberd_receiver:reset_stream(State#state.receiver),
Reply = ok,
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call({send, Data}, _From, State) ->
catch (State#state.sockmod):send(
State#state.socket, Data),
Reply = ok,
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call({change_shaper, Shaper}, _From, State) ->
ejabberd_receiver:change_shaper(State#state.receiver, Shaper),
Reply = ok,
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call(get_sockmod, _From, State) ->
Reply = State#state.sockmod,
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call(get_peer_certificate, _From, State) ->
Reply = tls:get_peer_certificate(State#state.socket),
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call(get_verify_result, _From, State) ->
Reply = tls:get_verify_result(State#state.socket),
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call(close, _From, State) ->
ejabberd_receiver:close(State#state.receiver),
Reply = ok,
{stop, normal, Reply, State};
handle_call(sockname, _From, State) ->
#state{sockmod = SockMod, socket = Socket} = State,
Reply = peername(SockMod, Socket),
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call(peername, _From, State) ->
#state{sockmod = SockMod, socket = Socket} = State,
Reply =
case SockMod of
gen_tcp ->
inet:peername(Socket);
_ ->
SockMod:peername(Socket)
end,
{reply, Reply, State, ?HIBERNATE_TIMEOUT};
handle_call({setopts, Opts}, _From, State) ->
ejabberd_receiver:setopts(State#state.receiver, Opts),
{reply, ok, State, ?HIBERNATE_TIMEOUT};
handle_call({change_controller, Pid}, _From, State) ->
ejabberd_receiver:change_controller(State#state.receiver, Pid),
{reply, ok, State, ?HIBERNATE_TIMEOUT};
handle_call(_Request, _From, State) ->
Reply = ok,
{reply, Reply, State, ?HIBERNATE_TIMEOUT}.
%%--------------------------------------------------------------------
%% Function: handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling cast messages
%%--------------------------------------------------------------------
handle_cast(_Msg, State) ->
{noreply, State, ?HIBERNATE_TIMEOUT}.
%%--------------------------------------------------------------------
%% Function: handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling all non call/cast messages
%%--------------------------------------------------------------------
handle_info(timeout, State) ->
proc_lib:hibernate(gen_server, enter_loop, [?MODULE, [], State]),
{noreply, State, ?HIBERNATE_TIMEOUT};
handle_info(_Info, State) ->
{noreply, State, ?HIBERNATE_TIMEOUT}.
%%--------------------------------------------------------------------
%% Function: terminate(Reason, State) -> void()
%% Description: This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%%--------------------------------------------------------------------
terminate(_Reason, _State) ->
ok.
%%--------------------------------------------------------------------
%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
%% Description: Convert process state when code is changed
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
check_starttls(SockMod, Socket, Receiver, Opts) ->
TLSEnabled = lists:member(tls, Opts),
TLSOpts = lists:filter(fun({certfile, _}) -> true;
(_) -> false
end, Opts),
if
TLSEnabled ->
{ok, TLSSocket} = ejabberd_receiver:starttls(Receiver, TLSOpts),
{tls, TLSSocket};
true ->
{SockMod, Socket}
end.
peername(SockMod, Socket) ->
case SockMod of
gen_tcp ->
inet:peername(Socket);
_ ->
SockMod:peername(Socket)
end.
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