From 0251e0a8af994a6229b4bc3f60b7887d5407d4b5 Mon Sep 17 00:00:00 2001
From: ignoramous <ignoramous@users.noreply.github.com>
Date: Sun, 12 Jun 2022 23:00:46 +0530
Subject: [PATCH] fdbased: WritePackets only returns 0 for tun/tap devices

---
 pkg/tcpip/link/fdbased/endpoint.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkg/tcpip/link/fdbased/endpoint.go b/pkg/tcpip/link/fdbased/endpoint.go
index a3fa225d7..564abbeec 100644
--- a/pkg/tcpip/link/fdbased/endpoint.go
+++ b/pkg/tcpip/link/fdbased/endpoint.go
@@ -563,6 +563,7 @@ func (e *endpoint) sendBatch(batchFDInfo fdInfo, pkts []*stack.PacketBuffer) (in
 				}
 				return 0, err
 			}
+			written = i
 		}
 		return written, nil
 	}