OpenWrt show connected clients

show_wifi_clients.sh

#!/bin/sh

# show_wifi_clients.sh
# Shows MAC, IP address and any hostname info for all connected wifi devices
# modification based on https://openwrt.org/faq/how_to_get_a_list_of_connected_clients

echo    "# All connected wifi devices, with IP address,"
echo    "# hostname (if available), and MAC address."

printf "%-15s %-15s %15s\n" "IP address" "Host" "MAC"

# list all wireless network interfaces
# (for MAC80211 driver; see wiki article for alternative commands)

for interface in `iw dev | grep Interface | cut -f 2 -s -d" "`
do
  echo "${interface}:"
  # for each interface, get mac addresses of connected stations/clients
  maclist=`iw dev $interface station dump | grep Station | cut -f 2 -s -d" "`
  # for each mac address in that list...
  for mac in $maclist
  do
    # If a DHCP lease has been given out by dnsmasq,
    # save it.
    ip="UNKN"
    host=""
    ip=`cat /tmp/dhcp.leases | cut -f 2,3,4 -s -d" " | grep $mac | cut -f 2 -s -d" "`
    host=`cat /tmp/dhcp.leases | cut -f 2,3,4 -s -d" " | grep "$mac" | cut -f 3 -s -d" "`


    # When $host = *
    echo "$host" | grep -E '^\*$' > /dev/null && host="N/A"
    # ... show the mac address:
    printf "%-15s %-15s %15s\n" $ip $host $mac
  done
done