File 2034-dtls-Fix-active-once-emulation-for-DTLS.patch of Package erlang
From 7e0d6f8fa3b5feb3dc6552d7d51ecd07f5f0af3f Mon Sep 17 00:00:00 2001
From: Ingela Anderton Andin <ingela@erlang.org>
Date: Sat, 8 Apr 2017 20:32:54 +0200
Subject: [PATCH 1/2] dtls: Fix active once emulation for DTLS
---
lib/ssl/src/dtls_connection.erl | 46 +++++++++++++++++++++++++++--------------
1 file changed, 30 insertions(+), 16 deletions(-)
diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl
index 16e0df210..e5f33d840 100644
--- a/lib/ssl/src/dtls_connection.erl
+++ b/lib/ssl/src/dtls_connection.erl
@@ -464,28 +464,42 @@ handle_info({Protocol, _, _, _, Data}, StateName,
{stop, {shutdown, own_alert}}
end;
handle_info({CloseTag, Socket}, StateName,
- #state{socket = Socket, close_tag = CloseTag,
+ #state{socket = Socket,
+ socket_options = #socket_options{active = Active},
+ protocol_buffers = #protocol_buffers{dtls_cipher_texts = CTs},
+ close_tag = CloseTag,
negotiated_version = Version} = State) ->
%% Note that as of DTLS 1.2 (TLS 1.1),
%% failure to properly close a connection no longer requires that a
%% session not be resumed. This is a change from DTLS 1.0 to conform
%% with widespread implementation practice.
- case Version of
- {254, N} when N =< 253 ->
- ok;
- _ ->
- %% As invalidate_sessions here causes performance issues,
- %% we will conform to the widespread implementation
- %% practice and go aginst the spec
- %%invalidate_session(Role, Host, Port, Session)
- ok
- end,
- ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
- {stop, {shutdown, transport_closed}};
-handle_info(new_cookie_secret, StateName, #state{protocol_specific = #{cookie_secret := Secret} = CookieInfo} = State) ->
+ case (Active == false) andalso (CTs =/= []) of
+ false ->
+ case Version of
+ {254, N} when N =< 253 ->
+ ok;
+ _ ->
+ %% As invalidate_sessions here causes performance issues,
+ %% we will conform to the widespread implementation
+ %% practice and go aginst the spec
+ %%invalidate_session(Role, Host, Port, Session)
+ ok
+ end,
+ ssl_connection:handle_normal_shutdown(?ALERT_REC(?FATAL, ?CLOSE_NOTIFY), StateName, State),
+ {stop, {shutdown, transport_closed}};
+ true ->
+ %% Fixes non-delivery of final DTLS record in {active, once}.
+ %% Basically allows the application the opportunity to set {active, once} again
+ %% and then receive the final message.
+ next_event(StateName, no_record, State)
+ end;
+
+handle_info(new_cookie_secret, StateName,
+ #state{protocol_specific = #{cookie_secret := Secret} = CookieInfo} = State) ->
erlang:send_after(dtls_v1:cookie_timeout(), self(), new_cookie_secret),
- {next_state, StateName, State#state{protocol_specific = CookieInfo#{cookie_secret => dtls_v1:cookie_secret(),
- previous_cookie_secret => Secret}}};
+ {next_state, StateName, State#state{protocol_specific =
+ CookieInfo#{cookie_secret => dtls_v1:cookie_secret(),
+ previous_cookie_secret => Secret}}};
handle_info(Msg, StateName, State) ->
ssl_connection:handle_info(Msg, StateName, State).
--
2.12.2
