%%
%% %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().
