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Class: Resolv::DNS::Requester::UnconnectedUDP

Do not use. This class is for internal use only.
Relationships & Source Files
Namespace Children
Classes:
Sender
Extension / Inclusion / Inheritance Descendants
Subclasses:
MDNSOneShot
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::Resolv::DNS::Requester
Instance Chain:
self, ::Resolv::DNS::Requester
Inherits: Resolv::DNS::Requester
Defined in: lib/resolv.rb

Class Method Summary

::Resolv::DNS::Requester - Inherited

.new

Instance Method Summary

::Resolv::DNS::Requester - Inherited

#close, #request, #sender_for

Constructor Details

.new(*nameserver_port) ⇒ UnconnectedUDP

[ GitHub ] 

  


# File 'lib/resolv.rb', line 722



def initialize(*nameserver_port)
  super()
  @nameserver_port = nameserver_port
  @initialized = false
  @mutex = Thread::Mutex.new
end


  







Instance Method Details



  

    #close  
  

  [ GitHub ]


  

  


# File 'lib/resolv.rb', line 776



def close
  @mutex.synchronize {
    if @initialized
      super
      @senders.each_key {|service, id|
        DNS.free_request_id(service[0], service[1], id)
      }
      @initialized = false
    end
  }
end


  








  

    #lazy_initialize  
  

  [ GitHub ]


  

  


# File 'lib/resolv.rb', line 729



def lazy_initialize
  @mutex.synchronize {
    next if @initialized
    @initialized = true
    @socks_hash = {}
    @socks = []
    @nameserver_port.each {|host, port|
      if host.index(':')
        bind_host = "::"
        af = Socket::AF_INET6
      else
        bind_host = "0.0.0.0"
        af = Socket::AF_INET
      end
      next if @socks_hash[bind_host]
      begin
        sock = UDPSocket.new(af)
      rescue Errno::EAFNOSUPPORT
        next # The kernel doesn't support the address family.
      end
      @socks << sock
      @socks_hash[bind_host] = sock
      sock.do_not_reverse_lookup = true
      DNS.bind_random_port(sock, bind_host)
    }
  }
  self
end


  








  

    #recv_reply(readable_socks)  
  

  [ GitHub ]


  

  


# File 'lib/resolv.rb', line 758



def recv_reply(readable_socks)
  lazy_initialize
  reply, from = readable_socks[0].recvfrom(UDPSize)
  return reply, [from[3],from[1]]
end


  








  

    #sender(msg, data, host, port = Port)  
  

  [ GitHub ]


  

  


# File 'lib/resolv.rb', line 764



def sender(msg, data, host, port=Port)
  lazy_initialize
  sock = @socks_hash[host.index(':') ? "::" : "0.0.0.0"]
  return nil if !sock
  service = [host, port]
  id = DNS.allocate_request_id(host, port)
  request = msg.encode
  request[0,2] = [id].pack('n')
  return @senders[[service, id]] =
    Sender.new(request, data, sock, host, port)
end