Merge pull request #473 from nodogsplash/4.3.4beta

fas: get-client-interface

forward_authentication_service/libs/get_client_interface.sh

@@ -0,0 +1,42 @@
+#!/bin/sh
+#Copyright (C) Blue Wave Projects and Services 2015-2019
+#This software is released under the GNU GPL license.
+
+# This script requires the iw package (usually available by default)
+
+# mac address of client is passed as a command line argument
+mac=$1
+
+# exit if mac not passed
+if [ -z $mac ]; then
+	exit 1
+fi
+
+# Get default interface
+# This will be the interface NDS is bound to eg. br-lan
+clientif=$(ip -4 neigh | awk -F ' ' 'match($s,"'"$mac"' REACHABLE")>0 {printf $3" "}')
+
+if [ -z $clientif ]; then
+	# The client has gone offline eg battery saving or switched to another ssid
+	exit 1
+fi
+
+# Get list of wireless interfaces on this device
+# This list will contain all the wireless interfaces configured on the device
+# eg wlan0, wlan0-1, wlan1, wlan1-1 etc
+interface_list=$(iw dev | awk -F 'Interface ' 'NF>1{printf $2" "}')
+
+# Scan the wireless interfaces on this device for the client mac
+for interface in $interface_list; do
+	macscan=$(iw dev $interface station dump | awk -F " " 'match($s, "'"$mac"'")>0{print $2}')
+	if [ ! -z $macscan ]; then
+		clientif=$interface
+		break
+	fi
+done
+
+# Return the local interface the client is using
+echo $clientif
+
+exit 0
+