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%% The contents of this file are subject to the Mozilla Public License
%% Version 1.1 (the "License"); you may not use this file except in
%% compliance with the License. You may obtain a copy of the License at
%% http://www.mozilla.org/MPL/
%%
%% 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.
%%
%% The Original Code is RabbitMQ.
%%
%% The Initial Developers of the Original Code are LShift Ltd.,
%% Cohesive Financial Technologies LLC., and Rabbit Technologies Ltd.
%%
%% Portions created by LShift Ltd., Cohesive Financial Technologies
%% LLC., and Rabbit Technologies Ltd. are Copyright (C) 2007-2008
%% LShift Ltd., Cohesive Financial Technologies LLC., and Rabbit
%% Technologies Ltd.;
%%
%% All Rights Reserved.
%%
%% Contributor(s): ______________________________________.
%%
-module(tcp_acceptor).
-behaviour(gen_server).
-export([start_link/2]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {callback, sock, ref}).
%%--------------------------------------------------------------------
start_link(Callback, LSock) ->
gen_server:start_link(?MODULE, {Callback, LSock}, []).
%%--------------------------------------------------------------------
init({Callback, LSock}) ->
case prim_inet:async_accept(LSock, -1) of
{ok, Ref} -> {ok, #state{callback=Callback, sock=LSock, ref=Ref}};
Error -> {stop, {cannot_accept, Error}}
end.
handle_call(_Request, _From, State) ->
{noreply, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info({inet_async, LSock, Ref, {ok, Sock}},
State = #state{callback={M,F,A}, sock=LSock, ref=Ref}) ->
%% patch up the socket so it looks like one we got from
%% gen_tcp:accept/1
{ok, Mod} = inet_db:lookup_socket(LSock),
inet_db:register_socket(Sock, Mod),
%% report
{ok, {Address, Port}} = inet:sockname(LSock),
{ok, {PeerAddress, PeerPort}} = inet:peername(Sock),
error_logger:info_msg("accepted TCP connection on ~s:~p from ~s:~p~n",
[inet_parse:ntoa(Address), Port,
inet_parse:ntoa(PeerAddress), PeerPort]),
%% handle
apply(M, F, A ++ [Sock]),
%% accept more
case prim_inet:async_accept(LSock, -1) of
{ok, NRef} -> {noreply, State#state{ref=NRef}};
Error -> {stop, {cannot_accept, Error}, none}
end;
handle_info({inet_async, LSock, Ref, {error, closed}},
State=#state{sock=LSock, ref=Ref}) ->
%% It would be wrong to attempt to restart the acceptor when we
%% know this will fail.
{stop, normal, State};
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
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