# File lib/proxifier/proxies/socks.rb, line 46
      def connect(socket, host, port)
        host = host[0, 0xFF]
        socket << [VERSION, 0x01, 0x00, 0x03, host.size, host, port].pack("CCCCCA#{host.size}n")
        version, status, _, type = socket.read(4).unpack("CCCC")
        check_version(version)

        case status
        when 0x00 # succeeded
        when 0x01 # general SOCKS server failure
          raise "general SOCKS server failure"
        when 0x02 # connection not allowed by ruleset
          raise "connection not allowed by ruleset"
        when 0x03 # Network unreachable
          raise "network unreachable"
        when 0x04 # Host unreachable
          raise "host unreachable"
        when 0x05 # Connection refused
          raise "connection refused"
        when 0x06 # TTL expired
          raise "TTL expired"
        when 0x07 # Command not supported
          raise "command not supported"
        when 0x08 # Address type not supported
          raise "address type not supported"
        else      # unassigned
          raise "unknown SOCKS error"
        end

        case type
        when 0x01 # IP V4 address
          destination = IPAddr.ntop(socket.read(4))
        when 0x03 # DOMAINNAME
          length = socket.read(1).unpack("C").first
          destination = socket.read(length).unpack("A#{length}")
        when 0x04 # IP V6 address
          destination = IPAddr.ntop(socket.read(16))
        else
          raise "unsupported SOCKS5 address type"
        end

        port = socket.read(2).unpack("n").first
      end