From: Florin Coras <fcoras@cisco.com>
Date: Tue, 2 Oct 2018 01:31:02 +0000 (-0700)
Subject: tcp: accept fins if in recovery
X-Git-Tag: v18.10-rc1~63
X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=commitdiff_plain;h=ca09d0730974effd53b436871f3e69c8bb8b1114

tcp: accept fins if in recovery

Change-Id: I0c9c055fcc3d681c4032228a90cc81f484e200f0
Signed-off-by: Florin Coras <fcoras@cisco.com>
---

diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index d297ee7ed3e..10f50fefc09 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -1401,7 +1401,9 @@ process_ack:
       if (!tcp_in_cong_recovery (tc))
 	return 0;
       *error = TCP_ERROR_ACK_DUP;
-      return vnet_buffer (b)->tcp.data_len ? 0 : -1;
+      if (vnet_buffer (b)->tcp.data_len || tcp_is_fin (th))
+	return 0;
+      return -1;
     }
 
   /*