ssl: Handle socket option inheritance when pooling of accept sockets is used

Implement a listen socket tracker process that holds the emulated socket
options so that it is possible to implement a destructive ssl:setopts
on SSL/TLS listen sockets without changing the options of the internal
socket as we want that socket to have the internal socket option values.

1 files changed, 71 insertions, 0 deletions

diff --git a/lib/ssl/src/ssl_listen_tracker_sup.erl b/lib/ssl/src/ssl_listen_tracker_sup.erl
new file mode 100644
index 0000000000..29f40e846d
--- /dev/null
+++ b/lib/ssl/src/ssl_listen_tracker_sup.erl
@@ -0,0 +1,71 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2014-2014. 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%
+%%
+
+%%
+%%----------------------------------------------------------------------
+%% Purpose: Supervisor for a listen options tracker
+%%----------------------------------------------------------------------
+-module(ssl_listen_tracker_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/0, start_link_dist/0]).
+-export([start_child/1, start_child_dist/1]).
+
+%% Supervisor callback
+-export([init/1]).
+
+%%%=========================================================================
+%%%  API
+%%%=========================================================================
+start_link() ->
+    supervisor:start_link({local, tracker_name(normal)}, ?MODULE, []).
+
+start_link_dist() ->
+    supervisor:start_link({local, tracker_name(dist)}, ?MODULE, []).
+
+start_child(Args) ->
+    supervisor:start_child(tracker_name(normal), Args).
+
+start_child_dist(Args) ->
+    supervisor:start_child(tracker_name(dist), Args).
+  
+%%%=========================================================================
+%%%  Supervisor callback
+%%%=========================================================================
+init(_O) ->
+    RestartStrategy = simple_one_for_one,
+    MaxR = 0,
+    MaxT = 3600,
+   
+    Name = undefined, % As simple_one_for_one is used.
+    StartFunc = {ssl_socket, start_link, []},
+    Restart = temporary, % E.g. should not be restarted
+    Shutdown = 4000,
+    Modules = [ssl_socket],
+    Type = worker,
+    
+    ChildSpec = {Name, StartFunc, Restart, Shutdown, Type, Modules},
+    {ok, {{RestartStrategy, MaxR, MaxT}, [ChildSpec]}}.
+
+tracker_name(normal) ->
+    ?MODULE;
+tracker_name(dist) ->
+    list_to_atom(atom_to_list(?MODULE) ++ "dist").