exec-batctl.rb

#!/usr/bin/env ruby
# encoding: utf-8

require 'json'

batctl = `sudo batctl vd json -n`

access_points, clients = [], []

batctl.each_line do |line|
  json = JSON.parse(line)

  if json['label'] =~ /^TT$/
    clients << json['gateway']
  end

  if json['router']
    access_points << json['router']
  end
end

ap_without_exits = access_points.uniq.count-2 # fastd3, fastd1

puts "APs: #{ap_without_exits}"
puts "Clients: #{clients.uniq.count-(ap_without_exits*2)}"