tcp: fix rcv_wnd computation

[vpp.git] / src / vnet / tcp / tcp_output.c

diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index 2f728cc..5a5c7fe 100644 (file)
--- 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;
     }