From 96dfeb2d7f0797f504935305d1e56cb91509809c Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Mon, 22 Mar 2021 21:47:42 -0700
Subject: [PATCH] wgengine: log tailscale pings

Fixes #1561

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
---
 wgengine/userspace.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/wgengine/userspace.go b/wgengine/userspace.go
index c9d966a99..49bc617e0 100644
--- a/wgengine/userspace.go
+++ b/wgengine/userspace.go
@@ -1346,14 +1346,18 @@ func (e *userspaceEngine) Ping(ip netaddr.IP, cb func(*ipnstate.PingResult)) {
 	res := &ipnstate.PingResult{IP: ip.String()}
 	peer, err := e.peerForIP(ip)
 	if err != nil {
+		e.logf("ping(%v): %v", ip, err)
 		res.Err = err.Error()
 		cb(res)
+		return
 	}
 	if peer == nil {
+		e.logf("ping(%v): no matching peer", ip)
 		res.Err = "no matching peer"
 		cb(res)
 		return
 	}
+	e.logf("ping(%v): sending ping to %v %v ...", ip, peer.Key.ShortString(), peer.ComputedName)
 	e.magicConn.Ping(peer, res, cb)
 }