The R13B03 release.OTP_R13B03

1 files changed, 124 insertions, 0 deletions

diff --git a/lib/ssl/src/ssl_session_cache.erl b/lib/ssl/src/ssl_session_cache.erl
new file mode 100644
index 0000000000..4a60892235
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+++ b/lib/ssl/src/ssl_session_cache.erl
@@ -0,0 +1,124 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2008-2009. 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_session_cache).
+
+-behaviour(ssl_session_cache_api).
+
+-export([init/0, terminate/1, lookup/2, update/3, delete/2, foldl/3, 
+	 select_session/2]).
+
+%%--------------------------------------------------------------------
+%% Function: init() -> Cache  
+%%
+%%	Cache - Reference to the cash (opaque)    
+%%
+%% Description: Return table reference. Called by ssl_manager process. 
+%%--------------------------------------------------------------------
+init() ->
+    ets:new(cache_name(), [set, protected]).
+
+%%--------------------------------------------------------------------
+%% Function: terminate(Cache) -> 
+%%
+%%      Cache - as returned by create/0
+%%
+%% Description: Handles cache table at termination of ssl manager. 
+%%--------------------------------------------------------------------
+terminate(Cache) ->
+    ets:delete(Cache).
+
+%%--------------------------------------------------------------------
+%% Function: lookup(Cache, Key) -> Session | undefined   
+%%      Cache - as returned by create/0   
+%%      Session = #session{}
+%%
+%% Description: Looks up a cach entry. Should be callable from any
+%% process.
+%%--------------------------------------------------------------------
+lookup(Cache, Key) ->
+    case ets:lookup(Cache, Key) of
+	[{Key, Session}] ->
+	    Session;
+	[] ->
+	    undefined
+    end.
+
+%%--------------------------------------------------------------------
+%% Function: update(Cache, Key, Session) -> _
+%%      Cache - as returned by create/0
+%%      Session = #session{}
+%%
+%% Description: Caches a new session or updates a already cached one.
+%% Will only be called from the ssl_manager process.
+%%--------------------------------------------------------------------
+update(Cache, Key, Session) ->
+    ets:insert(Cache, {Key, Session}).
+
+%%--------------------------------------------------------------------
+%% Function: delete(Cache, HostIP, Port, Id) -> _
+%%      Cache - as returned by create/0   
+%%      HostIP =  Host = string() | ipadress()
+%%      Port =  integer()
+%%      Id = 
+%%
+%% Description: Delets a cache entry.
+%% Will only be called from the ssl_manager process.
+%%--------------------------------------------------------------------
+delete(Cache, Key) ->
+    ets:delete(Cache, Key).
+
+%%--------------------------------------------------------------------
+%% Function: foldl(Fun, Acc0, Cache) -> Acc
+%%   
+%%	Fun  - fun()
+%%      Acc0  - term()
+%%      Cache  - cache_ref()
+%%
+%%
+%% Description: Calls Fun(Elem, AccIn) on successive elements of the
+%% cache, starting with AccIn == Acc0. Fun/2 must return a new
+%% accumulator which is passed to the next call. The function returns
+%% the final value of the accumulator. Acc0 is returned if the cache is
+%% empty. 
+%% Should be callable from any process
+%%--------------------------------------------------------------------
+foldl(Fun, Acc0, Cache) ->
+    ets:foldl(Fun, Acc0, Cache).
+  
+%%--------------------------------------------------------------------
+%% Function: select_session(Cache, PartialKey) -> [Sessions]
+%%
+%%     Cache - as returned by create/0   
+%%     PartialKey - opaque  Key = {PartialKey, SessionId}
+%%
+%% Description: Selects a session that could be reused. Should be callable
+%% from any process.
+%%--------------------------------------------------------------------
+select_session(Cache, PartialKey) ->    
+    ets:select(Cache, 
+	       [{{{PartialKey,'$1'}, '$2'},[],['$$']}]).
+
+%%--------------------------------------------------------------------
+%%% Internal functions
+%%--------------------------------------------------------------------
+
+cache_name() ->
+    ssl_otp_session_cache.