Module: Rtrace

Defined in:
lib/rtrace.rb,
lib/rtrace/version.rb

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Class Method Details

.run_loop ⇒ Object 



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# File 'lib/rtrace.rb', line 43

def self.run_loop
  ttl = @options[:first_ttl]
  while true do
    break if ttl>@options[:max_ttl]
    @send_socket.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, [ttl].pack('i'))
    t1 = Time.now
    @send_socket.send("", 0, @dest_addr)

    data = []
    begin
      timeout(@options[:timeout]) do
        data = @recv_socket.recvfrom( 512 )[1]
      end
    rescue Timeout::Error
      puts ttl.to_s.ljust(5)+"*"
      ttl += 1
      next
    end

    time = ((Time.now - t1)*1000).round 1
    time = time.to_s+" ms"
    ip   = data.ip_address
    loc  = Geocoder.search(ip).first

    if loc.city.empty?
      place = ""
    else
      place = "#{loc.city}, #{loc.state}"
    end

    begin
      name = Socket.getaddrinfo(ip, 0, Socket::AF_UNSPEC, Socket::SOCK_STREAM, nil, Socket::AI_CANONNAME, true)[0][2]
    rescue
      name = ""
    end

    s_ttl = ttl.to_s.ljust(5)
    name  = name.ljust(45)
    s_ip  = ip.ljust(20)
    time  = time.ljust(15)
    place = place.ljust(25)

    puts s_ttl+name+s_ip+time+place

    ttl += 1
    break if @dest_ip==ip
  end
  
end

.trace(options) ⇒ Object 



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# File 'lib/rtrace.rb', line 21

def self.trace(options)
  @options = options
  port = 33434

  @send_socket = Socket.new(:INET, :DGRAM)
  @dest_addr   = Socket.sockaddr_in(port, options[:host])
  @dest_ip     = IPSocket::getaddress(options[:host])
  puts "Traceroute for \"#{options[:host]}\" ( #{@dest_ip} ) ..."
  puts

  begin
    @recv_socket = Socket.new( Socket::PF_INET, Socket::SOCK_RAW, Socket::IPPROTO_ICMP)
  rescue Errno::EPERM => e
    puts "Sorry, you need to be root. Raw packets and all. Let me know if there's a better way."
    exit(1)
  end
  @recv_addr = Socket.sockaddr_in(port, "")
  @recv_socket.bind(@recv_addr)

  self.run_loop
end