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sctp_proxy: add all-state event handler

This patch prepares for a follow-up commit adding a request
(fetch_info) that must be handled in any state.

Change-Id: I7b6acba7dd367fa28db8922a38ac10c00bd479fe
---
M src/sctp_proxy.erl
1 file changed, 7 insertions(+), 5 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/erlang/osmo-s1gw refs/changes/92/38792/1

diff --git a/src/sctp_proxy.erl b/src/sctp_proxy.erl
index fc33f70..b23451f 100644
--- a/src/sctp_proxy.erl
+++ b/src/sctp_proxy.erl
@@ -144,8 +144,7 @@
     {keep_state, S};
 
 connecting(Event, EventData, S) ->
-    ?LOG_ERROR("Unexpected event ~p: ~p", [Event, EventData]),
-    {keep_state, S}.
+    handle_event(?FUNCTION_NAME, Event, EventData, S).
 
 
 %% CONNECTED state
@@ -198,12 +197,15 @@
                [MmeAddr, MmePort, AncData, Data]),
     {keep_state, S};
 
-%% Catch-all handler for this state
 connected(Event, EventData, S) ->
-    ?LOG_ERROR("Unexpected event ~p: ~p", [Event, EventData]),
-    {keep_state, S}.
+    handle_event(?FUNCTION_NAME, Event, EventData, S).
 
 
+%% Event handler for all states
+handle_event(State, Event, EventData, _S) ->
+    ?LOG_ERROR("Unexpected event ~p in state ~p: ~p", [Event, State, EventData]),
+    {keep_state_and_data}.
+
 
 code_change(_Vsn, State, S, _Extra) ->
     {ok, State, S}.

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