From f723bc2ef1e04c2e67f6b80070d2e92be54c4f31 Mon Sep 17 00:00:00 2001
From: Tom Eastep <teastep@shorewall.net>
Date: Mon, 15 Jun 2009 07:33:41 -0700
Subject: [PATCH] Restore find_interface_by_mac()

---
 Shorewall/lib.base | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Shorewall/lib.base b/Shorewall/lib.base
index 837b52f94..6ba82b93e 100644
--- a/Shorewall/lib.base
+++ b/Shorewall/lib.base
@@ -598,6 +598,32 @@ chain_exists() # $1 = chain name
     qt $IPTABLES -L $1 -n
 }
 
+#
+# Find the interface with the passed MAC address
+#
+
+find_interface_by_mac() {
+    local mac
+    mac=$1 
+    local first 
+    local second
+    local rest
+    local dev
+
+    ip link list | while read first second rest; do
+	case $first in
+	    *:)
+                dev=$second
+		;;
+	    *)
+	        if [ "$second" = $mac ]; then
+		    echo ${dev%:}
+		    return
+		fi
+	esac
+    done
+}
+
 #
 # Find interface address--returns the first IP address assigned to the passed
 # device