dnssd

#!/usr/bin/env ruby

require "socket"
require "ap"
require "json"

Thread.abort_on_exception = true

trap 'INT' do exit end
trap 'TERM' do exit end

if defined?(Bundler)
  raise "This tool cannot be called in the context of bundle exec"
elsif RUBY_PLATFORM[/darwin/]
  begin
    require "dnssd"
  rescue LoadError => _
    raise %Q[

This tool requires the dnssd gem which is not installed.  Install it:

gem install dnssd --version 2.0

and try again.
]
  end
else
  raise "This tool is not available on #{RUBY_PLATFORM}"
end

services = []
addresses = []

DNSSD.browse("_calabus._tcp") do |reply|
  services << reply
  next if reply.flags.more_coming?

  added = services.select do |service|
    service.flags.add?
  end

  added.each do |service|

    resolved = service.resolve

    addr = Socket.getaddrinfo(resolved.target, nil, Socket::AF_INET)

    addr.each do |address|
      match = addresses.find do |hash|
        hash[:service] == service.name
      end

      if !match
        addresses << {
          :service => service.name,
          :ip => addr[0][2],
          :port => resolved.port,
          :txt => resolved.text_record
        }
      end
    end
	end
  json = JSON.generate(addresses)
  puts json
  exit
end

sleep