Merged from trunk SVN r2671:

Support gen_tcp send timeout: Close the connection if the other end has disconnected ungracefully or cannot keep up with the rate at which we are sending data (EJAB-926)

SVN Revision: 2681

src/ejabberd_listener.erl

@@ -133,6 +133,7 @@ init_tcp(PortIP, Module, Opts, SockOpts, Port, IPS) ->
 				{reuseaddr, true},
 				{nodelay, true},
 				{send_timeout, ?TCP_SEND_TIMEOUT},
+                                {send_timeout_close, true},
 				{keepalive, true} |
 				SockOpts]),
     case Res of

src/ejabberd_s2s_out.erl

@@ -260,6 +260,7 @@ open_socket2(Type, Addr, Port) ->
     case (catch ejabberd_socket:connect(Addr, Port,
 					[binary, {packet, 0},
 					 {send_timeout, ?TCP_SEND_TIMEOUT},
+                                         {send_timeout_close, true},
 					 {active, false}, Type],
 					Timeout)) of
 	{ok, _Socket} = R -> R;

src/ejabberd_socket.erl

@@ -46,6 +46,8 @@
 	 close/1,
 	 sockname/1, peername/1]).
 
+-include("ejabberd.hrl").
+
 -record(socket_state, {sockmod, socket, receiver}).
 
 %%====================================================================
@@ -158,10 +160,22 @@ reset_stream(SocketData) when is_atom(SocketData#socket_state.receiver) ->
     (SocketData#socket_state.receiver):reset_stream(
       SocketData#socket_state.socket).
 
+%% sockmod=gen_tcp|tls|ejabberd_zlib
 send(SocketData, Data) ->
-    catch (SocketData#socket_state.sockmod):send(
-	    SocketData#socket_state.socket, Data).
+    case catch (SocketData#socket_state.sockmod):send(
+	     SocketData#socket_state.socket, Data) 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.
 
+%% Can only be called when in c2s StateData#state.xml_socket is true
+%% This function is used for HTTP bind
+%% sockmod=ejabberd_http_poll|ejabberd_http_bind or any custom module
 send_xml(SocketData, Data) ->
     catch (SocketData#socket_state.sockmod):send_xml(
 	    SocketData#socket_state.socket, Data).

src/web/ejabberd_http.erl

@@ -147,8 +147,15 @@ socket_type() ->
     raw.
 
 send_text(State, Text) ->
-    (State#state.sockmod):send(State#state.socket, Text).
-
+    case catch (State#state.sockmod):send(State#state.socket, Text) of
+        ok -> ok;
+	{error, timeout} ->
+	    ?INFO_MSG("Timeout on ~p:send",[State#state.sockmod]),
+	    exit(normal);
+        Error ->
+	    ?DEBUG("Error in ~p:send: ~p",[State#state.sockmod, Error]),
+	    exit(normal)
+    end.
 
 receive_headers(State) ->
     SockMod = State#state.sockmod,