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epdg_ue_fsm: Increase timeout waiting for gtp response

Answers can take a while specially during CreateSession, where several
nodes are involved, like PGW, AAA, HSS, PCRF, etc.

Change-Id: I3c8e7c7551bb3d48c46c0195c02cb44ce222a17f
---
M src/epdg_ue_fsm.erl
1 file changed, 15 insertions(+), 1 deletion(-)

git pull ssh://gerrit.osmocom.org:29418/erlang/osmo-epdg refs/changes/16/36116/1

diff --git a/src/epdg_ue_fsm.erl b/src/epdg_ue_fsm.erl
index 439cb3f..94f2a39 100644
--- a/src/epdg_ue_fsm.erl
+++ b/src/epdg_ue_fsm.erl
@@ -49,6 +49,8 @@
          state_wait_create_session_resp/3, state_wait_delete_session_resp/3,
          state_wait_swm_session_termination_answer/3, state_active/3]).
 
+-define(TIMEOUT_VAL_WAIT_GTP_ANSWER, 10000).
+
 -record(ue_fsm_data, {
         imsi,
         apn = "internet" :: string(),
@@ -274,7 +276,7 @@
         {keep_state, Data}.
 
 state_wait_create_session_resp(enter, _OldState, Data) ->
-        {keep_state, Data, [{state_timeout,5000,create_session_timeout}]};
+        {keep_state, Data, [{state_timeout,?TIMEOUT_VAL_WAIT_GTP_ANSWER,create_session_timeout}]};
 
 state_wait_create_session_resp({call, From}, {received_gtpc_create_session_response, Result}, Data) ->
         lager:info("ue_fsm state_authenticated event=received_gtpc_create_session_response, ~p~n", [Data]),

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