From 717c715c964c70a63d67804086a6bdde4c2dc0c7 Mon Sep 17 00:00:00 2001
From: Josh Bleecher Snyder <josh@tailscale.com>
Date: Mon, 1 Feb 2021 14:37:58 -0800
Subject: [PATCH] wgengine/wglog: don't log failure to send data packets

Fixes #1239
---
 wgengine/wglog/wglog.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/wgengine/wglog/wglog.go b/wgengine/wglog/wglog.go
index 6f3e490f2..7786edd82 100644
--- a/wgengine/wglog/wglog.go
+++ b/wgengine/wglog/wglog.go
@@ -36,6 +36,10 @@ func NewLogger(logf logger.Logf) *Logger {
 			// Drop those; there are a lot of them, and they're just noise.
 			return
 		}
+		if strings.Contains(msg, "Failed to send data packet") {
+			// Drop. See https://github.com/tailscale/tailscale/issues/1239.
+			return
+		}
 		r := ret.replacer.Load()
 		if r == nil {
 			// No replacements specified; log as originally planned.