tcp: count dupacks with no sacks

Type: fix

Signed-off-by: Florin Coras <fcoras@cisco.com>
Change-Id: Ia2e29b4776c0f8df666da39a14c5ef2fa1693c21
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 91021e8..6ed478f 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -2064,6 +2064,7 @@
   if (!vec_len (tc->snd_sacks))
     {
       tcp_send_ack (tc);
+      tc->dupacks_out += 1;
       tc->pending_dupacks = 0;
       return 1;
     }