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-rw-r--r--lib/ssl/src/dtls_socket.erl155
1 files changed, 155 insertions, 0 deletions
diff --git a/lib/ssl/src/dtls_socket.erl b/lib/ssl/src/dtls_socket.erl
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+++ b/lib/ssl/src/dtls_socket.erl
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2016-2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(dtls_socket).
+
+-include("ssl_internal.hrl").
+-include("ssl_api.hrl").
+
+-export([send/3, listen/3, accept/3, connect/4, socket/4, setopts/3, getopts/3, getstat/3,
+ peername/2, sockname/2, port/2, close/2]).
+-export([emulated_options/0, internal_inet_values/0, default_inet_values/0, default_cb_info/0]).
+
+send(Transport, {{IP,Port},Socket}, Data) ->
+ Transport:send(Socket, IP, Port, Data).
+
+listen(gen_udp = Transport, Port, #config{transport_info = {Transport, _, _, _},
+ ssl = SslOpts,
+ emulated = EmOpts,
+ inet_user = Options} = Config) ->
+
+
+ case dtls_udp_sup:start_child([Port, emulated_socket_options(EmOpts, #socket_options{}),
+ Options ++ internal_inet_values(), SslOpts]) of
+ {ok, Pid} ->
+ {ok, #sslsocket{pid = {udp, Config#config{udp_handler = {Pid, Port}}}}};
+ Err = {error, _} ->
+ Err
+ end.
+
+accept(udp, #config{transport_info = {Transport = gen_udp,_,_,_},
+ connection_cb = ConnectionCb,
+ udp_handler = {Listner, _}}, _Timeout) ->
+ case dtls_udp_listener:accept(Listner, self()) of
+ {ok, Pid, Socket} ->
+ {ok, socket(Pid, Transport, {Listner, Socket}, ConnectionCb)};
+ {error, Reason} ->
+ {error, Reason}
+ end.
+
+connect(Address, Port, #config{transport_info = {Transport, _, _, _} = CbInfo,
+ connection_cb = ConnectionCb,
+ ssl = SslOpts,
+ emulated = EmOpts,
+ inet_ssl = SocketOpts}, Timeout) ->
+ case Transport:open(0, SocketOpts ++ internal_inet_values()) of
+ {ok, Socket} ->
+ ssl_connection:connect(ConnectionCb, Address, Port, {{Address, Port},Socket},
+ {SslOpts,
+ emulated_socket_options(EmOpts, #socket_options{}), undefined},
+ self(), CbInfo, Timeout);
+ {error, _} = Error->
+ Error
+ end.
+
+close(gen_udp, {_Client, _Socket}) ->
+ ok.
+
+socket(Pid, gen_udp = Transport, {{_, _}, Socket}, ConnectionCb) ->
+ #sslsocket{pid = Pid,
+ %% "The name "fd" is keept for backwards compatibility
+ fd = {Transport, Socket, ConnectionCb}};
+socket(Pid, Transport, Socket, ConnectionCb) ->
+ #sslsocket{pid = Pid,
+ %% "The name "fd" is keept for backwards compatibility
+ fd = {Transport, Socket, ConnectionCb}}.
+%% Vad göra med emulerade
+setopts(gen_udp, #sslsocket{pid = {Socket, _}}, Options) ->
+ {SockOpts, _} = tls_socket:split_options(Options),
+ inet:setopts(Socket, SockOpts);
+setopts(_, #sslsocket{pid = {ListenSocket, #config{transport_info = {Transport,_,_,_}}}}, Options) ->
+ {SockOpts, _} = tls_socket:split_options(Options),
+ Transport:setopts(ListenSocket, SockOpts);
+%%% Following clauses will not be called for emulated options, they are handled in the connection process
+setopts(gen_udp, Socket, Options) ->
+ inet:setopts(Socket, Options);
+setopts(Transport, Socket, Options) ->
+ Transport:setopts(Socket, Options).
+
+getopts(gen_udp, #sslsocket{pid = {Socket, #config{emulated = EmOpts}}}, Options) ->
+ {SockOptNames, EmulatedOptNames} = tls_socket:split_options(Options),
+ EmulatedOpts = get_emulated_opts(EmOpts, EmulatedOptNames),
+ SocketOpts = tls_socket:get_socket_opts(Socket, SockOptNames, inet),
+ {ok, EmulatedOpts ++ SocketOpts};
+getopts(Transport, #sslsocket{pid = {ListenSocket, #config{emulated = EmOpts}}}, Options) ->
+ {SockOptNames, EmulatedOptNames} = tls_socket:split_options(Options),
+ EmulatedOpts = get_emulated_opts(EmOpts, EmulatedOptNames),
+ SocketOpts = tls_socket: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_udp, {_,Socket}, Options) ->
+ inet:getopts(Socket, Options);
+getopts(Transport, Socket, Options) ->
+ Transport:getopts(Socket, Options).
+getstat(gen_udp, {_,Socket}, Options) ->
+ inet:getstat(Socket, Options);
+getstat(Transport, Socket, Options) ->
+ Transport:getstat(Socket, Options).
+peername(udp, _) ->
+ {error, enotconn};
+peername(gen_udp, {_, {Client, _Socket}}) ->
+ {ok, Client};
+peername(Transport, Socket) ->
+ Transport:peername(Socket).
+sockname(gen_udp, {_, {_,Socket}}) ->
+ inet:sockname(Socket);
+sockname(gen_udp, Socket) ->
+ inet:sockname(Socket);
+sockname(Transport, Socket) ->
+ Transport:sockname(Socket).
+
+port(gen_udp, {_,Socket}) ->
+ inet:port(Socket);
+port(Transport, Socket) ->
+ Transport:port(Socket).
+
+emulated_options() ->
+ [mode, active, packet, packet_size].
+
+internal_inet_values() ->
+ [{active, false}, {mode,binary}].
+
+default_inet_values() ->
+ [{active, true}, {mode, list}].
+
+default_cb_info() ->
+ {gen_udp, udp, udp_closed, udp_error}.
+
+get_emulated_opts(EmOpts, EmOptNames) ->
+ lists:map(fun(Name) -> {value, Value} = lists:keysearch(Name, 1, EmOpts),
+ Value end,
+ EmOptNames).
+
+emulated_socket_options(InetValues, #socket_options{
+ mode = Mode,
+ active = Active}) ->
+ #socket_options{
+ mode = proplists:get_value(mode, InetValues, Mode),
+ active = proplists:get_value(active, InetValues, Active)
+ }.