tcp: improve rcv process ack processing

- Avoid doing cc in closing states.
- Rest connections closed with unread data

Change-Id: I97d46b0459f03ea5439eeb0f233b6c17d3e06dfd
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/vnet/session/session.h b/src/vnet/session/session.h
index a3b84a6..ed42e54 100644
--- a/src/vnet/session/session.h
+++ b/src/vnet/session/session.h
@@ -389,6 +389,13 @@
 }
 
 always_inline u32
+transport_max_rx_dequeue (transport_connection_t * tc)
+{
+  session_t *s = session_get (tc->s_index, tc->thread_index);
+  return svm_fifo_max_dequeue (s->rx_fifo);
+}
+
+always_inline u32
 transport_rx_fifo_size (transport_connection_t * tc)
 {
   session_t *s = session_get (tc->s_index, tc->thread_index);
diff --git a/src/vnet/session/transport.c b/src/vnet/session/transport.c
index abab086..d83ecfb 100644
--- a/src/vnet/session/transport.c
+++ b/src/vnet/session/transport.c
@@ -49,7 +49,7 @@
 
 #define TRANSPORT_PACER_MIN_MSS 	1460
 #define TRANSPORT_PACER_MIN_BURST 	TRANSPORT_PACER_MIN_MSS
-#define TRANSPORT_PACER_MAX_BURST	(48 * TRANSPORT_PACER_MIN_MSS)
+#define TRANSPORT_PACER_MAX_BURST	(32 * TRANSPORT_PACER_MIN_MSS)
 
 u8 *
 format_transport_proto (u8 * s, va_list * args)