From: Florin Coras <fcoras@cisco.com>
Date: Thu, 7 Mar 2019 05:16:26 +0000 (-0800)
Subject: tcp: fix rcv_wnd computation
X-Git-Tag: v19.04-rc1~272
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=679b78f7155b18efa690b0d2a4a0b51c00090522;p=vpp.git

tcp: fix rcv_wnd computation

Change-Id: I3cecffae2e30233d4725bd3eaf5ff4a8ff194fae
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 2f728cc7333..5a5c7fe4b8b 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -172,7 +172,7 @@ tcp_update_rcv_wnd (tcp_connection_t * tc)
   /* Make sure we have a multiple of rcv_wscale */
   if (wnd && tc->rcv_wscale)
     {
-      wnd &= ~(1 << tc->rcv_wscale);
+      wnd &= ~((1 << tc->rcv_wscale) - 1);
       if (wnd == 0)
 	wnd = 1 << tc->rcv_wscale;
     }