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+%% Copyright (c) 2011-2012, Loïc Hoguin <[email protected]>
+%%
+%% Permission to use, copy, modify, and/or distribute this software for any
+%% purpose with or without fee is hereby granted, provided that the above
+%% copyright notice and this permission notice appear in all copies.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+%% @doc TCP transport API.
+%%
+%% Wrapper around <em>gen_tcp</em> implementing the Ranch transport API.
+%%
+%% @see gen_tcp
+-module(ranch_tcp).
+
+-export([name/0, messages/0, listen/1, accept/2, recv/3, send/2, setopts/2,
+ controlling_process/2, peername/1, close/1, sockname/1]).
+
+%% @doc Name of this transport API, <em>tcp</em>.
+-spec name() -> tcp.
+name() -> tcp.
+
+%% @doc Atoms used in the process messages sent by this API.
+%%
+%% They identify incoming data, closed connection and errors when receiving
+%% data in active mode.
+-spec messages() -> {tcp, tcp_closed, tcp_error}.
+messages() -> {tcp, tcp_closed, tcp_error}.
+
+%% @doc Setup a socket to listen on the given port on the local host.
+%%
+%% The available options are:
+%% <dl>
+%% <dt>port</dt><dd>Mandatory. TCP port number to open.</dd>
+%% <dt>backlog</dt><dd>Maximum length of the pending connections queue.
+%% Defaults to 1024.</dd>
+%% <dt>ip</dt><dd>Interface to listen on. Listen on all interfaces
+%% by default.</dd>
+%% </dl>
+%%
+%% @see gen_tcp:listen/2
+-spec listen([{port, inet:port_number()} | {ip, inet:ip_address()}])
+ -> {ok, inet:socket()} | {error, atom()}.
+listen(Opts) ->
+ {port, Port} = lists:keyfind(port, 1, Opts),
+ Backlog = proplists:get_value(backlog, Opts, 1024),
+ ListenOpts0 = [binary, {active, false},
+ {backlog, Backlog}, {packet, raw}, {reuseaddr, true}],
+ ListenOpts =
+ case lists:keyfind(ip, 1, Opts) of
+ false -> ListenOpts0;
+ Ip -> [Ip|ListenOpts0]
+ end,
+ gen_tcp:listen(Port, ListenOpts).
+
+%% @doc Accept an incoming connection on a listen socket.
+%% @see gen_tcp:accept/2
+-spec accept(inet:socket(), timeout())
+ -> {ok, inet:socket()} | {error, closed | timeout | atom()}.
+accept(LSocket, Timeout) ->
+ gen_tcp:accept(LSocket, Timeout).
+
+%% @doc Receive a packet from a socket in passive mode.
+%% @see gen_tcp:recv/3
+-spec recv(inet:socket(), non_neg_integer(), timeout())
+ -> {ok, any()} | {error, closed | atom()}.
+recv(Socket, Length, Timeout) ->
+ gen_tcp:recv(Socket, Length, Timeout).
+
+%% @doc Send a packet on a socket.
+%% @see gen_tcp:send/2
+-spec send(inet:socket(), iolist()) -> ok | {error, atom()}.
+send(Socket, Packet) ->
+ gen_tcp:send(Socket, Packet).
+
+%% @doc Set one or more options for a socket.
+%% @see inet:setopts/2
+-spec setopts(inet:socket(), list()) -> ok | {error, atom()}.
+setopts(Socket, Opts) ->
+ inet:setopts(Socket, Opts).
+
+%% @doc Assign a new controlling process <em>Pid</em> to <em>Socket</em>.
+%% @see gen_tcp:controlling_process/2
+-spec controlling_process(inet:socket(), pid())
+ -> ok | {error, closed | not_owner | atom()}.
+controlling_process(Socket, Pid) ->
+ gen_tcp:controlling_process(Socket, Pid).
+
+%% @doc Return the address and port for the other end of a connection.
+%% @see inet:peername/1
+-spec peername(inet:socket())
+ -> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
+peername(Socket) ->
+ inet:peername(Socket).
+
+%% @doc Close a TCP socket.
+%% @see gen_tcp:close/1
+-spec close(inet:socket()) -> ok.
+close(Socket) ->
+ gen_tcp:close(Socket).
+
+%% @doc Get the local address and port of a socket
+%% @see inet:sockname/1
+-spec sockname(inet:socket())
+ -> {ok, {inet:ip_address(), inet:port_number()}} | {error, atom()}.
+sockname(Socket) ->
+ inet:sockname(Socket).