control/controlclient: allow for an unset linkMon.

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago · 1bc3c03562
parent fa6110e47b
commit 1bc3c03562
1 changed files with 1 additions and 1 deletions
--- a/control/controlclient/direct.go
+++ b/control/controlclient/direct.go
@ -547,7 +547,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, cb func(*netm
 		OmitPeers:  cb == nil,
 	}
 	var extraDebugFlags []string
-	if hostinfo != nil && ipForwardingBroken(hostinfo.RoutableIPs, c.linkMon.InterfaceState()) {
+	if hostinfo != nil && c.linkMon != nil && ipForwardingBroken(hostinfo.RoutableIPs, c.linkMon.InterfaceState()) {
 		extraDebugFlags = append(extraDebugFlags, "warn-ip-forwarding-off")
 	}
 	if health.RouterHealth() != nil {