1 files changed, 117 insertions, 0 deletions
diff --git a/lib/kernel/src/gen_udp.erl b/lib/kernel/src/gen_udp.erl
new file mode 100644
index 0000000000..6bded4bda6
--- /dev/null
+++ b/lib/kernel/src/gen_udp.erl
@@ -0,0 +1,117 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+-module(gen_udp).
+
+-export([open/1, open/2, close/1]).
+-export([send/2, send/4, recv/2, recv/3, connect/3]).
+-export([controlling_process/2]).
+-export([fdopen/2]).
+
+-include("inet_int.hrl").
+
+open(Port) -> 
+    open(Port, []).
+
+open(Port, Opts) ->
+    Mod = mod(Opts),
+    {ok,UP} = Mod:getserv(Port),
+    Mod:open(UP, Opts).
+
+close(S) ->
+    inet:udp_close(S).
+
+send(S, Address, Port, Packet) when is_port(S) ->
+    case inet_db:lookup_socket(S) of
+	{ok, Mod} ->
+	    case Mod:getaddr(Address) of
+		{ok,IP} ->
+		    case Mod:getserv(Port) of
+			{ok,UP} -> Mod:send(S, IP, UP, Packet);
+			{error,einval} -> exit(badarg);
+			Error -> Error
+		    end;
+		{error,einval} -> exit(badarg);
+		Error -> Error
+	    end;
+	Error ->
+	    Error
+    end.
+
+send(S, Packet) when is_port(S) ->
+    case inet_db:lookup_socket(S) of
+	{ok, Mod} ->
+	    Mod:send(S, Packet);
+	Error ->
+	    Error
+    end.
+
+recv(S,Len) when is_port(S), is_integer(Len) ->
+    case inet_db:lookup_socket(S) of
+	{ok, Mod} ->
+	    Mod:recv(S, Len);
+	Error ->
+	    Error
+    end.
+
+recv(S,Len,Time) when is_port(S) ->
+    case inet_db:lookup_socket(S) of
+	{ok, Mod} ->
+	    Mod:recv(S, Len,Time);
+	Error ->
+	    Error
+    end.
+
+connect(S, Address, Port) when is_port(S) ->
+    case inet_db:lookup_socket(S) of
+	{ok, Mod} ->
+	    case Mod:getaddr(Address) of    
+		{ok, IP} ->
+		    Mod:connect(S, IP, Port);
+		Error ->
+		    Error
+	    end;
+	Error ->
+	    Error
+    end.
+
+controlling_process(S, NewOwner) ->
+    inet:udp_controlling_process(S, NewOwner).
+
+%%
+%% Create a port/socket from a file descriptor 
+%%
+fdopen(Fd, Opts) ->
+    Mod = mod(),
+    Mod:fdopen(Fd, Opts).
+
+
+%% Get the udp_module
+mod() -> inet_db:udp_module().
+
+%% Get the udp_module, but option udp_module|inet|inet6 overrides
+mod([{udp_module,Mod}|_]) ->
+    Mod;
+mod([inet|_]) ->
+    inet_udp;
+mod([inet6|_]) ->
+    inet6_udp;
+mod([_|Opts]) ->
+    mod(Opts);
+mod([]) ->
+    mod().