%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1998-2014. 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(ssl_socket).
-behaviour(gen_server).
-include("ssl_internal.hrl").
-include("ssl_api.hrl").
-export([socket/4, setopts/3, getopts/3, peername/2, sockname/2, port/2]).
-export([emulated_options/0, internal_inet_values/0, default_inet_values/0,
init/1, start_link/2, terminate/2, inherit_tracker/3, get_emulated_opts/1,
set_emulated_opts/2, handle_call/3, handle_cast/2,
handle_info/2, code_change/3]).
-record(state, {
emulated_opts,
port
}).
%%--------------------------------------------------------------------
%%% Internal API
%%--------------------------------------------------------------------
socket(Pid, Transport, Socket, ConnectionCb) ->
#sslsocket{pid = Pid,
%% "The name "fd" is keept for backwards compatibility
fd = {Transport, Socket, ConnectionCb}}.
setopts(gen_tcp, #sslsocket{pid = {ListenSocket, #config{emulated = Tracker}}}, Options) ->
{SockOpts, EmulatedOpts} = split_options(Options),
ok = set_emulated_opts(Tracker, EmulatedOpts),
inet:setopts(ListenSocket, SockOpts);
setopts(_, #sslsocket{pid = {ListenSocket, #config{transport_info = {Transport,_,_,_},
emulated = Tracker}}}, Options) ->
{SockOpts, EmulatedOpts} = split_options(Options),
ok = set_emulated_opts(Tracker, EmulatedOpts),
Transport:setopts(ListenSocket, SockOpts);
%%% Following clauses will not be called for emulated options, they are handled in the connection process
setopts(gen_tcp, Socket, Options) ->
inet:setopts(Socket, Options);
setopts(Transport, Socket, Options) ->
Transport:setopts(Socket, Options).
getopts(gen_tcp, #sslsocket{pid = {ListenSocket, #config{emulated = Tracker}}}, Options) ->
{SockOptNames, EmulatedOptNames} = split_options(Options),
EmulatedOpts = get_emulated_opts(Tracker, EmulatedOptNames),
SocketOpts = get_socket_opts(ListenSocket, SockOptNames, inet),
{ok, EmulatedOpts ++ SocketOpts};
getopts(Transport, #sslsocket{pid = {ListenSocket, #config{emulated = Tracker}}}, Options) ->
{SockOptNames, EmulatedOptNames} = split_options(Options),
EmulatedOpts = get_emulated_opts(Tracker, EmulatedOptNames),
SocketOpts = get_socket_opts(ListenSocket, SockOptNames, Transport),
{ok, EmulatedOpts ++ SocketOpts};
%%% Following clauses will not be called for emulated options, they are handled in the connection process
getopts(gen_tcp, Socket, Options) ->
inet:getopts(Socket, Options);
getopts(Transport, Socket, Options) ->
Transport:getopts(Socket, Options).
peername(gen_tcp, Socket) ->
inet:peername(Socket);
peername(Transport, Socket) ->
Transport:peername(Socket).
sockname(gen_tcp, Socket) ->
inet:sockname(Socket);
sockname(Transport, Socket) ->
Transport:sockname(Socket).
port(gen_tcp, Socket) ->
inet:port(Socket);
port(Transport, Socket) ->
Transport:port(Socket).
emulated_options() ->
[mode, packet, active, header, packet_size].
internal_inet_values() ->
[{packet_size,0}, {packet, 0}, {header, 0}, {active, false}, {mode,binary}].
default_inet_values() ->
[{packet_size, 0}, {packet,0}, {header, 0}, {active, true}, {mode, list}].
inherit_tracker(ListenSocket, EmOpts, #ssl_options{erl_dist = false}) ->
ssl_listen_tracker_sup:start_child([ListenSocket, EmOpts]);
inherit_tracker(ListenSocket, EmOpts, #ssl_options{erl_dist = true}) ->
ssl_listen_tracker_sup:start_child_dist([ListenSocket, EmOpts]).
get_emulated_opts(TrackerPid, EmOptNames) ->
{ok, EmOpts} = get_emulated_opts(TrackerPid),
lists:map(fun(Name) -> {value, Value} = lists:keysearch(Name, 1, EmOpts),
Value end,
EmOptNames).
get_emulated_opts(TrackerPid) ->
call(TrackerPid, get_emulated_opts).
set_emulated_opts(TrackerPid, InetValues) ->
call(TrackerPid, {set_emulated_opts, InetValues}).
%%====================================================================
%% ssl_listen_tracker_sup API
%%====================================================================
start_link(Port, SockOpts) ->
gen_server:start_link(?MODULE, [Port, SockOpts], []).
%%--------------------------------------------------------------------
-spec init(list()) -> {ok, #state{}}.
%% Possible return values not used now.
%% | {ok, #state{}, timeout()} | ignore | {stop, term()}.
%%
%% Description: Initiates the server
%%--------------------------------------------------------------------
init([Port, Opts]) ->
process_flag(trap_exit, true),
true = link(Port),
{ok, #state{emulated_opts = Opts, port = Port}}.
%%--------------------------------------------------------------------
-spec handle_call(msg(), from(), #state{}) -> {reply, reply(), #state{}}.
%% Possible return values not used now.
%% {reply, reply(), #state{}, timeout()} |
%% {noreply, #state{}} |
%% {noreply, #state{}, timeout()} |
%% {stop, reason(), reply(), #state{}} |
%% {stop, reason(), #state{}}.
%%
%% Description: Handling call messages
%%--------------------------------------------------------------------
handle_call({set_emulated_opts, Opts0}, _From,
#state{emulated_opts = Opts1} = State) ->
Opts = do_set_emulated_opts(Opts0, Opts1),
{reply, ok, State#state{emulated_opts = Opts}};
handle_call(get_emulated_opts, _From,
#state{emulated_opts = Opts} = State) ->
{reply, {ok, Opts}, State}.
%%--------------------------------------------------------------------
-spec handle_cast(msg(), #state{}) -> {noreply, #state{}}.
%% Possible return values not used now.
%% | {noreply, #state{}, timeout()} |
%% {stop, reason(), #state{}}.
%%
%% Description: Handling cast messages
%%--------------------------------------------------------------------
handle_cast(_, State)->
{noreply, State}.
%%--------------------------------------------------------------------
-spec handle_info(msg(), #state{}) -> {noreply, #state{}}.
%% Possible return values not used now.
%% |{noreply, #state{}, timeout()} |
%% {stop, reason(), #state{}}.
%%
%% Description: Handling all non call/cast messages
%%-------------------------------------------------------------------
handle_info({'EXIT', Port, _}, #state{port = Port} = State) ->
{stop, normal, State}.
%%--------------------------------------------------------------------
-spec terminate(reason(), #state{}) -> ok.
%%
%% Description: This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%%--------------------------------------------------------------------
terminate(_Reason, _State) ->
ok.
%%--------------------------------------------------------------------
-spec code_change(term(), #state{}, list()) -> {ok, #state{}}.
%%
%% Description: Convert process state when code is changed
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
call(Pid, Msg) ->
gen_server:call(Pid, Msg, infinity).
split_options(Opts) ->
split_options(Opts, emulated_options(), [], []).
split_options([], _, SocketOpts, EmuOpts) ->
{SocketOpts, EmuOpts};
split_options([{Name, _} = Opt | Opts], Emu, SocketOpts, EmuOpts) ->
case lists:member(Name, Emu) of
true ->
split_options(Opts, Emu, SocketOpts, [Opt | EmuOpts]);
false ->
split_options(Opts, Emu, [Opt | SocketOpts], EmuOpts)
end;
split_options([Name | Opts], Emu, SocketOptNames, EmuOptNames) ->
case lists:member(Name, Emu) of
true ->
split_options(Opts, Emu, SocketOptNames, [Name | EmuOptNames]);
false ->
split_options(Opts, Emu, [Name | SocketOptNames], EmuOptNames)
end.
do_set_emulated_opts([], Opts) ->
Opts;
do_set_emulated_opts([{Name,_} = Opt | Rest], Opts) ->
do_set_emulated_opts(Rest, [Opt | proplists:delete(Name, Opts)]).
get_socket_opts(_, [], _) ->
[];
get_socket_opts(ListenSocket, SockOptNames, Cb) ->
{ok, Opts} = Cb:getopts(ListenSocket, SockOptNames),
Opts.
