tls: fix multi threaded medium scale test (VPP-1457)

- ensure session enqueue epoch does not wrap between two enqueues
- use 3 states for echo clients app, to distinguish between starting and
closing phases
- force tcp fin retransmit if out of buffers while sending a fin

Change-Id: I6f2cab46affd1148aba2a33fb6d58bcc54f32805
Signed-off-by: Florin Coras <fcoras@cisco.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/vnet/session-apps/echo_client.h b/src/vnet/session-apps/echo_client.h
index db5ba163628..2270720dcda 100644
--- a/src/vnet/session-apps/echo_client.h
+++ b/src/vnet/session-apps/echo_client.h
@@ -105,6 +105,12 @@ typedef struct
   vlib_main_t *vlib_main;
 } echo_client_main_t;
 
+enum
+{
+  ECHO_CLIENTS_STARTING,
+  ECHO_CLIENTS_RUNNING,
+  ECHO_CLIENTS_EXITING
+} echo_clients_test_state_e;
 extern echo_client_main_t echo_client_main;
 
 vlib_node_registration_t echo_clients_node;