From 40bef2127c943b45ce98311bf200f6ac054adca9 Mon Sep 17 00:00:00 2001
From: Manevolent <Manevolent@users.noreply.github.com>
Date: Wed, 12 Apr 2023 22:33:08 -0600
Subject: [PATCH] Update subnet-up.tmpl

---
 tinc/subnet-up.tmpl | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tinc/subnet-up.tmpl b/tinc/subnet-up.tmpl
index a64840c..5277565 100644
--- a/tinc/subnet-up.tmpl
+++ b/tinc/subnet-up.tmpl
@@ -7,6 +7,10 @@ if [ -z "\$nonMACChars" ]; then
   echo "\$SUBNET" > \$macFile
 else
   # This subnet is likely an IP address, add it to the ARP table
-  mac=`cat \$macFile`
-  arp -s "\$SUBNET" "\$mac"
+  if test -f "\$macFile"; then
+    mac=`cat \$macFile`
+    arp -s "\$SUBNET" "\$mac"
+  else
+    echo "WARNING: No MAC known for node \$NODE, can't route \$SUBNET. This is only a problem if this is a remote route."
+  fi
 fi