From: Florin Coras <fcoras@cisco.com>
Date: Wed, 24 Jul 2019 17:27:20 +0000 (-0700)
Subject: tcp: force zero window on full rx fifo
X-Git-Tag: v19.08.2~320
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=fbe948c8131caec64168029ff54802668e423b33;p=vpp.git

tcp: force zero window on full rx fifo

Type: feature

Change-Id: I7c5684a9f88e56fd62d83a59c14c4e4a6f096b89
Signed-off-by: Florin Coras <fcoras@cisco.com>
(cherry picked from commit 182d2198332c2a20891a7cdbceeaaf62b47924e8)
---

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index d15d710eafe..9122973fc8e 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -122,7 +122,10 @@ tcp_update_rcv_wnd (tcp_connection_t * tc)
    */
   available_space = transport_max_rx_enqueue (&tc->connection);
   if (PREDICT_FALSE (available_space < tc->rcv_opts.mss))
-    available_space = 0;
+    {
+      tc->rcv_wnd = 0;
+      return;
+    }
 
   /*
    * Use the above and what we know about what we've previously advertised