central/em_server.rb

#!/usr/bin/env ruby

require 'eventmachine'
require 'digest/md5'
require 'fiber'
require 'geoip'
require 'socket'
require 'timeout'




# .. allowed commands .. ROLES = CAPABILITIES
# normal users have ROLE broadcast. Roles are defined on a per-user basis .. in a config.

$version = "0.4em_cooldns_classes_for_caching"
$debug = 0

$role_commands = Hash[
  #noinspection RubyStringKeysInHashInspection
  'everyone' => %w(PING WHO C PART),

  'broadcast_admin' => %w(BC_ID BC BC_ENDCOUNT),
  'broadcast' => %w(REQ_BC BC_RE),
	
	'specbot_admin' => %w(REQ_ASSIGN REQ_UNASSIGN REQ_PING REQ_ASSIGNMENTS),
	'specbot' => %w(ASSIGN_RE UNASSIGN_RE PING_RE ASSIGNMENTS_RE REQ_DNS),
]

$default_role = "everyone"

# which role is talking to which role?
# effectively it says: this (local) command is sent to that (remote) topic .. that certain topic is read by that user with that role.
$role_dialogs = Hash[
  #noinspection RubyStringKeysInHashInspection
	'everyone' => %w(everyone),
	
	'broadcast_admin' => %w(broadcast),
	'broadcast' => %w(broadcast_admin),
	
	'specbot_admin' => %w(specbot),
	'specbot' => %w(specbot_admin),
	]

$user_roles = Hash[
  #noinspection RubyStringKeysInHashInspection
	'paul_dev_eggdrop' => %w(everyone broadcast),
	'paul_eggdrop' => %w(everyone broadcast),
	
	'paul_dev_specbot' => %w(everyone broadcast specbot),
	'paul_specbot' => %w(everyone broadcast specbot),
	
	'qw.nu' => %w(everyone broadcast),
	'qw.nu_poster' => %w(everyone broadcast),
	
	'mihawk_dev_specbot' => %w(everyone broadcast specbot),
	'mihawk_specbot' => %w(everyone broadcast specbot),

  'armitage_specbot' => %w(everyone broadcast specbot),

]



$qw_list = Array.new
$qw_list = [
    "89.149.194.72:27700",
        "84.200.47.113:30000",
        "89.149.194.72:27500",
        "84.200.47.113:28502",
        "89.149.194.72:30000",
        "89.149.194.72:27600",
        "93.186.192.16:28502",
        "84.200.47.113:28501",
        "93.186.192.16:28501",
        "188.40.130.10:27502",
        "93.186.192.16:30000",
        "188.40.130.10:27599",
        "188.40.130.10:27503",
        "194.109.69.75:28000",
        "194.109.69.75:27500",
        "194.109.69.75:27501",
        "194.109.69.76:28504",
        "188.165.243.56:30000",
        "188.40.130.10:27501",
        "194.109.69.76:28502",
        "194.109.69.76:28501",
        "194.109.69.76:28503",
        "62.24.64.11:27501",
        "62.24.64.11:44444",
        "188.40.103.81:27600",
        "62.24.64.11:30000",
        "194.109.69.75:27502",
        "91.121.69.201:30000",
        "37.59.63.97:28504",
        "188.40.130.10:27500",
        "188.165.243.56:28009",
        "37.59.63.97:28501",
        "62.24.64.11:27500",
        "37.59.63.97:28503",
        "194.109.69.76:30000",
        "188.165.243.56:28008",
        "188.165.243.56:28006",
        "188.165.243.56:28001",
        "188.165.243.56:28002",
        "93.186.192.16:27500",
        "91.121.69.201:27600",
        "37.59.63.97:28502",
        "91.121.223.163:28001",
        "188.165.243.56:28003",
        "109.74.195.224:30000",
        "178.79.183.178:27500",
        "77.74.194.189:27501",
        "91.121.69.201:27502",
        "188.165.243.56:28007",
        "109.74.195.224:27500",
        "213.5.176.135:27502",
        "77.74.194.189:27504",
        "178.79.172.251:27600",
        "77.74.194.189:27502",
        "77.74.194.189:27503",
        "213.5.176.135:27500",
        "109.74.195.224:27501",
        "89.104.194.146:27504",
        "89.104.194.146:27503",
        "89.104.194.146:27508",
        "213.5.176.136:27510",
        "213.5.176.135:27501",
        "213.5.176.135:27503",
        "77.74.194.189:30000",
        "89.149.194.72:27800",
        "89.104.194.146:27502",
        "89.104.194.146:27666",
        "89.104.194.146:27507",
        "89.104.194.146:27509",
        "89.104.194.146:30000",
        "188.165.243.56:28004",
        "89.104.194.146:27500",
        "89.104.194.146:27501",
        "194.109.69.76:27500",
        "89.104.194.146:27506",
        "94.236.92.49:27501",
        "91.121.69.201:27501",
        "213.239.214.134:27500",
        "89.104.194.146:27510",
        "95.131.48.86:27502",
        "94.236.92.49:27500",
        "94.236.92.49:30000",
        "95.131.48.86:27504",
        "78.137.161.109:27501",
        "188.165.243.56:28005",
        "178.217.185.104:27500",
        "178.217.185.104:27600",
        "178.217.185.104:30000",
        "87.102.202.23:27502",
        "78.137.161.109:27500",
        "89.104.194.146:27505",
        "87.102.202.23:27505",
        "178.217.185.104:27501",
        "91.121.69.201:27500",
        "82.141.152.3:27501",
        "82.141.152.3:27500",
        "83.179.23.16:28002",
        "109.74.7.60:27500",
        "212.62.234.153:27502",
        "83.179.23.16:28003",
        "195.54.182.34:27500",
        "83.179.23.16:28005",
        "212.62.234.153:27503",
        "95.143.243.24:27600",
        "83.179.23.16:28001",
        "212.62.234.153:27504",
        "78.137.161.109:27502",
        "83.179.23.16:28004",
        "212.62.234.153:27501",
        "95.143.243.24:27500",
        "109.228.137.161:28501",
        "95.143.243.24:27900",
        "83.226.149.218:27500",
        "83.226.149.218:28001",
        "83.226.149.218:28002",
        "83.226.149.218:28003",
        "193.1.40.166:27975",
        "87.237.112.11:30000",
        "217.30.184.104:27500",
        "78.108.53.19:27500",
        "78.108.53.19:27501",
        "195.54.142.7:28001",
        "193.1.40.166:27500",
        "87.237.112.11:27501",
        "195.54.142.7:30000",
        "195.54.142.7:28007",
        "217.119.36.79:30000",
        "95.131.48.86:27501",
        "195.54.142.7:28002",
        "195.54.142.7:28008",
        "80.101.105.103:27500",
        "87.237.112.11:27502",
        "217.119.36.79:27500",
        "81.170.128.75:28501",
        "217.119.36.79:28001",
        "193.1.40.167:27500",
        "217.119.36.79:28003",
        "217.119.36.79:28002",
        "81.170.128.75:30000",
        "81.170.128.75:28504",
        "195.54.142.7:28005",
        "195.54.142.7:28010",
        "81.170.128.75:28503",
        "93.81.254.63:27502",
        "212.42.38.88:27504",
        "81.170.128.75:28502",
        "93.81.254.63:27500",
        "81.170.128.75:28000",
        "212.42.38.88:27500",
        "82.203.213.117:28002",
        "212.42.38.88:30000",
        "93.81.254.63:30000",
        "82.203.213.117:28001",
        "212.42.38.88:27501",
        "212.42.38.88:27503",
        "93.81.254.63:27503",
        "93.81.254.63:27501",
        "82.203.213.117:30000",
        "95.131.48.86:27503",
        "83.252.244.76:27500",
        "212.42.38.88:27502",
        "195.54.142.7:28003",
        "95.31.4.132:30000",
        "83.252.244.76:27501",
        "93.81.254.63:30001",
        "195.54.142.7:28006",
        "82.203.213.117:28003",
        "95.143.243.24:27700",
        "84.234.185.215:27503",
        "84.234.185.215:27500",
        "84.234.185.215:27519",
        "84.234.185.215:27508",
        "84.234.185.215:27506",
        "84.234.185.215:27505",
        "195.54.142.7:28004",
        "84.234.185.215:27501",
        "195.54.142.7:28009",
        "212.109.128.148:27501",
        "84.234.185.215:27502",
        "31.209.7.104:28501",
        "194.79.85.66:27501",
        "194.79.85.66:30000",
        "95.84.164.245:27501",
        "194.79.85.66:27502",
        "83.222.112.157:30000",
        "212.109.128.148:27500",
        "94.100.6.66:27500",
        "129.241.205.153:28000",
        "84.234.185.215:27507",
        "129.241.205.153:27500",
        "95.84.164.245:27500",
        "69.31.82.226:27501",
        "69.31.82.226:30000",
        "130.240.207.177:30000",
        "69.31.82.226:28100",
        "69.31.82.226:27500",
        "69.31.82.226:28101",
        "69.31.82.226:28010",
        "69.31.82.226:30001",
        "69.31.82.226:28000",
        "69.31.82.226:28002",
        "93.186.192.16:28000",
        "195.222.130.83:27500",
        "84.200.47.113:28000",
        "130.85.56.131:27500",
        "108.174.51.73:28003",
        "96.8.113.36:27501",
        "96.8.113.36:27500",
        "68.100.130.114:27501",
        "65.31.69.75:27500",
        "108.174.51.73:28006",
        "65.31.69.75:27508",
        "108.174.51.73:30000",
        "67.81.59.41:27500",
        "108.174.51.73:28004",
        "217.18.138.23:27505",
        "108.174.51.73:28001",
        "68.100.130.114:27500",
        "174.49.198.60:27502",
        "174.49.198.60:27503",
        "209.239.113.236:27500",
        "174.49.198.60:27515",
        "217.119.36.79:28000",
        "108.174.51.73:28005",
        "74.91.115.244:28001",
        "174.49.198.60:27500",
        "74.91.115.244:28000",
        "199.101.96.48:27501",
        "96.8.113.36:30000",
        "174.101.185.59:27500",
        "67.228.69.114:27502",
        "199.101.96.48:27500",
        "108.174.51.73:28002",
        "199.192.229.74:28001",
        "74.86.171.201:27502",
        "67.228.69.114:27501",
        "74.86.171.201:27500",
        "67.228.69.114:26666",
        "199.192.228.71:27501",
        "199.192.229.74:28003",
        "74.86.171.201:27501",
        "199.192.229.74:30000",
        "199.192.229.74:28002",
        "74.91.115.244:28002",
        "199.192.228.71:27500",
        "199.101.96.48:30000",
        "199.101.96.48:28000",
        "199.192.229.74:28004",
        "199.192.228.71:30000",
        "65.31.238.37:27500",
        "31.209.7.104:28000",
        "208.131.136.169:27500",
        "66.212.17.78:27500",
        "200.177.229.11:27510",
        "200.177.229.11:27522",
        "200.177.229.11:27521",
        "200.177.229.11:27500",
        "190.96.80.67:27500",
        "200.177.229.11:27511",
        "200.177.229.11:27520",
        "190.96.80.67:27000",
        "202.37.129.186:27500",
        "202.37.129.186:27505",
        "202.37.129.186:27501",
        "219.88.241.81:27500",
        "202.172.99.2:28001",
        "202.172.99.2:28002",
        "202.172.99.2:28003",
        "202.172.99.2:27500",
        "210.50.4.11:27501",
        "202.172.99.2:27501",
        "210.50.4.11:27508",
        "210.50.4.11:27511",
        "210.50.4.11:27509",
        "210.50.4.11:27510",
        "122.99.118.2:28001",
        "210.50.4.11:27500",
        "210.50.4.11:27503",
        "210.50.4.11:27506",
        "210.50.4.11:27505",
        "210.50.4.11:27504",
        ]


class GameServers

  attr_accessor :gameservers # now, @gameservers is accessible via GameServers.gameservers

  def initialize

    @gameservers = Hash.new
    @gameservers.default = {
      :reverse_dns => "",
      :hostname_dns => "",
      :cool_dns => "",
      :type => "",
      :serverinfos => "",
      :timestamp => 0,
    }

    @gameservers["blah:blah"]

    wat = Hash.new(@gameservers["blah:blah"])
    wat
    wat.store(:reverse_dns, "6")
    @gameservers.merge(wat)

    p @gameservers
    p @gameservers.default

    wat = Hash.new(@gameservers["blah:blah"])
    wat
    wat.store(:hostname_dns, "12")
    @gameservers.merge(wat)

    p @gameservers
    p @gameservers.default



  end

  def scanserver(iphostport, type="qw", force=false)
    put_log "scanserver drin"
    if iphostport =~ /^(\d+\.\d+\.\d+\.\d+):(\d{1,5})/
      iphost = $1
      ipport = $2

      if type == "qw"
        #p current

        # check if it already exists

        #if @gameservers["#{iphost}:#{ipport}"][:timestamp] > 0

          # if old general data, then freshly get general data...
        #  if @gameservers["#{iphost}:#{ipport}"][:timestamp] + 60 * 60 * 20 < Time.now.utc.to_i || force == true
        #  end     # of old


        #else
          current = Hash.new

          serverinfos = qwstatus(iphost, ipport)

          current.store(:serverinfos, serverinfos)
          current.store(:reverse_dns, find_reverse_dname(iphost))
          current.store(:hostname_dns, qw_find_dname_by_serverinfos(serverinfos))
          current.store(:type, "qw")
          # set new timestamp
          current.store(:timestamp, Time.now.utc.to_i)
          @gameservers.store("#{iphost}:#{ipport}", current) # save it all.

          current.store(:cool_dns, find_cooldns(iphost, ipport))
          @gameservers.store("#{iphost}:#{ipport}", current) # save it all.

          #put_log "the saved one: #{@gameservers.fetch("#{iphost}:#{ipport}").fetch(:cool_dns)}"

          #puts "ALL"
          #p @gameservers
          #puts "DEFAULT of the hash"
          #p @gameservers.default

        #end
      end # of type qw
    end # of check form of iphostport parameter
  end # of scan()

  def scanserverlist(gs_array, type="qw")
    put_log "scanserverlist drin"
    gs_array.each do
      |gserver|
      scanserver(gserver, type)
    end
    put_log "End of scanning."
    put_log "foppa: #{@gameservers.fetch("89.104.194.146:27503")} "
  end # of scanserverlist()

  def get_cool_dns(iphost, ipport)
    put_log "get_cool_dns drin"
    @gameservers.fetch("#{iphost}:#{ipport}").fetch(:cool_dns)
  rescue
    scanserver("#{iphost}:#{ipport}", "qw")
    @gameservers.fetch("#{iphost}:#{ipport}").fetch(:cool_dns)
  end

  private # all following methods are private
  # returns serverinfo hash
  def qwstatus(iphost, ipport)
    put_log "qwstatus drin"
    udp_payload = [0xFF, 0xFF, 0xFF, 0xFF]
    udp_payload.concat(string2bytearray("status 23"))
    udp_payload.concat([0x0a]) # linefeed at the end

    udp_payload = udp_payload.pack("C*")
    #p udp_payload

    Timeout::timeout(2) do
      begin
        u2 = UDPSocket.new
        #put_log "#{iphost} #{ipport} #{udp_payload}"
        u2.send(udp_payload, 0, iphost, ipport)
        #put_log "sent"

        the_return = u2.recv(500)

        u2.close

        #put_log "muh #{the_return}"
        if the_return =~ /\W\W\W\Wn\\(.+)$/
          line = $1
          #put_log "line #{line}"
          matches = line.scan(/(.+?)\\(.+?)(\\|$)/)

          the_hash = Hash.new
          matches.each {
              |k, v, _|
            the_hash[k] = "#{v}"
          }
          return the_hash
        else
          return false
        end

      rescue Exception => e
        puts e.message
      end # of begin
    end # of Timeout


  end

  def find_cooldns_full(iphost, ipport)
    targetname = iphost
    # resolve it to a dns name (reverse lookup)
    if targetname == iphost # if it is still default
      put_log "Ip not resolved .. we try hostname dns finder"
      targetname = qw_find_dname_in_hostnames(iphost, ipport)
    end


    # resolve it to a dns name (reverse lookup)
    if targetname == iphost
      put_log "Still no resolve .. we try reverse dns lookup"
      targetname = find_reverse_dname(iphost)
    end

    return targetname
  end

  def find_cooldns(iphost, ipport)
    put_log "find_cooldns drin"
    current = @gameservers["#{iphost}:#{ipport}"] # only use this for reading...

    my_cooldns = iphost

    # we still haven't found a cool dns
    if (my_cooldns == iphost) && (not current[:hostname_dns].to_s.empty?)
      put_log "Try if #{current[:hostname_dns]} resolves to #{iphost}"
      begin
        ip_of_hostnamedns = Resolv.getaddress(current[:hostname_dns])
        if ip_of_hostnamedns && (ip_of_hostnamedns == iphost)
          # ok, we take it.
          put_log "Ok, we take #{current[:hostname_dns]} for #{iphost} here.."
          my_cooldns = current[:hostname_dns]
        else
          put_log "Found #{current[:hostname_dns]} but #{ip_of_hostnamedns} is not #{iphost}"
        end
      rescue Exception => e
        my_cooldns = iphost
      end
    end

    # we still haven't found a cool dns
    unless current[:reverse_dns].to_s.empty?
      if my_cooldns == iphost

        rdns = current[:reverse_dns]

        # if the resulting dns name...
        # .. is too long, use ip-address instead.
        # .. has too many dots, use ip-address instead.
        # .. has too many numbers, use ip-address instead.
        if rdns.length > 21 || rdns.split(".").size > 3 || rdns.scan(/\d/).size > 3
          put_log "cutting down host_name: #{rdns}, because:"
          put_log "length: #{rdns.length}"
          put_log "chunks count: #{rdns.split(".").size}"
          put_log "num count: #{rdns.scan(/\d/).size}"
        else
          my_cooldns = rdns
        end # of Resolv.getname
      end
    end

    put_log "COOOOOOOOOOOOLDNS: #{my_cooldns}"

    my_cooldns
  end


  def find_reverse_dname(iphost)
    put_log "find_reverse_dname drin"
    dname = Resolv.getname(iphost)
    ip_of_dname = Resolv.getaddress(dname)
    if ip_of_dname == iphost
      return dname
    end
  rescue
    iphost
  end

  def qw_find_dname_by_udp(iphost, ipport)
    targetname = iphost # set a default

    # get hostname from a qw status packet! perhaps there's a DNS name inside, which we can use!
    status = qwstatus(iphost, ipport)
    p status

    if status["hostname"] =~ /([\w\.-]{3,}\.\w{2,4})/
      hostnamedns = $1.downcase

      begin
        ip_of_hostnamedns = Resolv.getaddress(hostnamedns)
        if ip_of_hostnamedns && (ip_of_hostnamedns == iphost)
          # ok, we take it.
          put_log "Ok, we take #{hostnamedns} for #{iphost} here.."
          targetname = hostnamedns
        else
          put_log "Found #{hostnamedns} but #{ip_of_hostnamedns} is not #{iphost}"
        end
      rescue Exception => e
        targetname = iphost
      end

    end

    targetname
  end

  def qw_find_dname_by_serverinfos(serverinfos)
    hostnamedns = ""
    begin
      hostname = serverinfos.fetch("hostname")

      if hostname =~ /([\w\.-]{3,}\.\w{2,4})/
        hostnamedns = $1.downcase
      end
      return hostnamedns

    rescue
      return ""
    end
  end

end # of Class GameServers!







def string2bytearray(text)
  return_array = Array.new
  text.each_byte{
    |b|
    return_array.push(b)
  }
  return_array
end

def put_log(msg)
  puts "#{Time.now.utc.strftime("%Y-%m-%d %H:%M:%S")}: #{msg}"
end






module CentralProtocolHandler
	
	@@connected_clients = Array.new
	@@broadcasts = Hash.new
  put_log "Server started"



  # default method that is being run on connection!
	def post_init # connection of someone starts here...
		@username = nil
	end


	### getters
	def entered_username?
		!@username.nil? && !@username.empty? # then it's true
	end

	def username
		@username
	end

	def my_roles
		$user_roles[@username]
	end

	def my_cmds
		my_roles.collect {|v| $role_commands[v]}.flatten
	end

	# returns online users by default by searching through saved connections
	def ousers
		users = Array.new
		@@connected_clients.each {|c| users.push(c.username)}

		users
	end # of ousers

	### checkers
	def allowed_cmd(inputmessage)
		my_cmds.each{|c|
			#print "A #{c} B #{inputmessage}\n"
			if inputmessage =~ /^#{c}/
				return true
			end
		}

		false
	end

	def online(user)
		if ousers.include? user
			true
		else
			false
		end
	end



	### actions
	# searches through our hash of saved connections and writes them a messages.
	def	write_user(input, username = nil)
		if username.nil? || username.empty?
			username = @username
		end
		if @@connected_clients.find { |c| c.username == username }
      connection = @@connected_clients.find { |c| c.username == username }
      put_log("to #{username}: #{input}")
      sometime = "#{Time.now.utc.strftime("%Y-%m-%d %H:%M:%S %z")}"
			line = "#{sometime}: #{input}\n"
			connection.send_data line
		end
	end # of write_user

	# searches through roles and writes those users on their connections
	def write_role(role, input, *exempts)
		#find users with role
		users = Array.new
		$user_roles.each {|k, v|
		                 if v.include? role
			                 users.push(k)
		                 end
		                 }

		# find users that are online and inside Array "users"
		lala = Array.new
		users.each {|v|
		           if ousers.include? v
			           lala.push(v)
		           end
		           }

		# now write to them
		lala.each {|user|
		          if not exempts.include? user
			          write_user(input, user)
		          end
		          }
	end	# of write_role()



	# what happens with what input?!
	def inputting(input)

    put_log("SYS #{@username} typed: #{input}")
		#write_user("SYS You typed: #{input}")

		if input =~ /^([A-Z_]+)/
			cmd = $1
		end
		# now we have the cmd .. or not ;)

		if input =~ /^[A-Z_]+ (.+)/
			payload = $1
		end
		# now we can use payload

		if allowed_cmd(cmd)

			### typical system commands follow
			if cmd == "PING"
				write_user("PONG")

			elsif cmd == "C"

				if payload =~ /^(.+)$/
					write_role($default_role, "C #{@username}: #{$1}")

				else
					write_user("SYS Format is C <chattext>")
				end

		  elsif cmd == "WHO"
				ousers.each {|ouser| write_user("WHO_RE #{ouser} ROLES: #{$user_roles[ouser].join(", ")}")}


			elsif cmd == "PART"
				write_user("SYS Goodbye '#{@username}'.")
				write_role($default_role, "PARTED User '#{@username}' leaves the party.", @username)
				return "bye"

			###now for the good stuff, broadcasting
			elsif cmd == "REQ_BC"

				# help with format .. but send the raw payload
				if payload =~ /^(.+),(.+),(.+),'(.+)','(.+)'$/
					#              n    f    s     ni     txt
					error = 0
					# $&
					# The string matched by the last successful pattern match in this scope, or nil if the last pattern match failed. (Mnemonic: like & in some editors.) This variable is r
					network = $1
					freqname = $2
					source = $3
					nickname = $4
					text = $5

					if not network =~ /^(QWalt)|(QDEV)/
						write_user("SYS Network name #{network} is unknown: QWalt or QDEV allowed.")
						error = 1
					end

					if not freqname =~ /^(-qw-)|(-spam-)|(-dev-)/
						write_user("SYS Frequency name is unknown #{freqname}")
						error = 1
					end

					if source =~ /^(#.+)|(qw:\/\/)|(http:\/\/)/

          else
						write_user("SYS Source string is not in the form ^(#.+)|(qw:\/\/)|(http:\/\/)  was: #{source}")
						error = 1
					end

					if not nickname =~ /^.+/
						write_user("SYS Nickname string is not in the form ^.+  #{nickname}")
						error = 1
					end

					if not text =~ /^.+/
						write_user("SYS Message string is not in the form ^.+ #{text}")
						error = 1
					end

				else # of payload has format
					write_user("SYS Command format is REQ_BC <network>,<frequency>,<source/channel>,'<nickname>','<message>'")
					error = 1
				end # of payload has format

				if error == 0

					# send REQ_BC to the corresponding role.
					bcid = Digest::MD5.hexdigest("%d %s %s %s %s %s" % [Time.now.utc.to_i, network, freqname, source, nickname, text])

					# so it only reaches the issuer of REQ_BC
					write_user("BC_ID #{bcid} for: #{network},#{freqname},#{source}")
					@@broadcasts[bcid] = @username

          # qw:// ip resolving
          if source =~ /^qw:\/\/(.+):(\d+)(.*)$/
            # ip address is 15 in length
            iphost = $1
            targetname = iphost # set a default
            ipport = $2
            rest = $3

            if iphost =~ /^\d+\.\d+\.\d+\.\d+/

              targetname = $gs.get_cool_dns(iphost, ipport)

              # find country code
              cc = GeoIP.new('GeoIP.dat').country(iphost)[3].to_s.downcase

              rest.prepend " #{cc}" unless cc.nil? || cc.empty? || targetname =~ /\.#{cc}$/

            end # if ip is x.x.x.x

            source = "qw://#{targetname}:#{ipport}#{rest}"
          end # of if source qw://x.x.x.x:portzzz

          # resolve
					finalmessage = "BC %s %s,%s,%s,'%s','%s'" % [bcid, network, freqname, source, nickname, text]
					write_role("broadcast", finalmessage, @username) # write to the role with the exempt of myself.


				end
  		#end of REQ_BC here..

      elsif cmd == "REQ_DNS"
        # help with format .. but send the raw payload
        if payload =~ /^(\d+\.\d+\.\d+\.\d+):(\d{1,5})/
          iphost = $1
          ipport = $2

          targetname = $gs.get_cool_dns(iphost, ipport)

          write_user("DNS_RE #{iphost}:#{ipport} #{targetname}") # write back to asking user.

        else # of payload has format
          write_user("SYS Command format is REQ_DNS <serverip>:<serverport>")
          error = 1
        end # of if payload has format
      #end of REQ_DNS here..


        elsif cmd == "BC_RE"

				if payload =~ /^(.+) (.+)=(\d+),(.+)=(\d+)$/

					bcid = $1
					user_string = $2
					user_count = $3
					item_string = $4
					item_count = $5

					payload = "%s %s=%d,%s=%d" % [bcid, user_string, user_count, item_string, item_count]
					# according bcid it is possible to get the originating user.. so send only to his topic!

					if @@broadcasts[bcid]
						to_user = @@broadcasts[bcid]

						write_user("SYS Broadcast reply bcid: #{bcid} underway to #{to_user}.")
						write_user("#{cmd} #{payload}", to_user)
					else
						write_user("SYS Broadcast reply bcid: #{bcid} underway.")
						write_role("broadcast", "#{cmd} #{payload}", @username)
					end

				else # of bc_re format check
					put_log "SYS Format is BC_RE <bcid> <userstring>=<usercount>,<itemstring>=<itemcount>"
				end

			end


    else  # of if allowed command
      if input.length > 15
        input = input.slice(0,14) + ".."
      end
			write_user("SYS Command '#{input}' not allowed, your commands are: #{my_cmds.join(", ")}.")
		end  # of if allowed command

	end # of inputting!



	# default method that is being run on receiving data!
	def receive_data(data) # connection receives a line on the server end

    data = data.chomp unless data.chomp.nil?

    data.each_line do |line|

      unless line.empty?

        if entered_username? # oh, it's a known user

          # it's alive! kill ping timer, set a new one:
          if @ping_timer
            EventMachine.cancel_timer(@ping_timer)
          end
          @ping_timer = EventMachine.add_periodic_timer 180, proc { write_user("PING alive?") }

          # work on input
          inputter = inputting(line)
          if inputter == "bye"
            close_connection
          end

        else # of username known, then it seems to be the first connect

          # and this line is the user name coming in!
          username = line

          if online(username)
            put_log "SYS User '#{username}' tried to double connect. Say bye bye."
            send_data "SYS Hey '#{username}', only one connection allowed. Bye.\n"
            EventMachine.add_timer 1, proc {
              write_user("PING check forced", username)
              close_connection
            }

            return false
          end

          if $user_roles.any? {|k| k.include? username}
            @username = username
            @@connected_clients.push(self)
            @ping_timer = EventMachine.add_periodic_timer 90, proc { write_user("PING alive?") }
            # starting a pinger

            put_log("SYS '#{@username}' connected. Online now: #{ousers.join(", ")}")

            write_user("HELLO Hi user '#{@username}'! How are you? I'm '#{$version}'")
            write_user("ROLES #{my_roles.join(", ")}")
            write_user("COMMANDS #{my_cmds.join(", ")}")
            write_role($default_role, "JOINED User '#{@username}' just joined the party.", @username)
          else
            put_log "SYS User '#{username}' unknown to me. Saying bye."
            send_data "SYS User '#{username}' unknown to me. Bye.\n"

            # disconnect him
            close_connection
          end

        end # of username known
      end # of unless line.empty?
    end # of data.each_line

	end # of receive data

	# default method that is being run on disconnection!
	def unbind # a connection goes bye bye
		if @username
			@@connected_clients.delete(self)
      if @ping_timer
        EventMachine.cancel_timer(@ping_timer)
      end

			put_log "SYS '#{@username}' disconnected."
      write_role($default_role, "SYS User '#{@username}' disconnected.", @username)


    end
    put_log "SYS Online users now: #{ousers.join(", ")}"

	end
end

def main
	# #run: Note that this will block current thread.

    $gs = GameServers.new

    EventMachine.run do

      # initial scan
      EM.defer do
        $gs.scanserverlist($qw_list, "qw") # initial scan
      end

      # periodic scan, 20 hours
      EventMachine.add_periodic_timer( 60 * 60 * 20 ) {
        EM.defer do
          $gs.scanserverlist($qw_list, "qw") # initial scan
        end
      }

      EventMachine.start_server("0.0.0.0", 7337, CentralProtocolHandler)
    end

end # of main

main