Method: Dnsruby::Recursor#query

Defined in:
lib/Dnsruby/Recursor.rb

#query(name, type = Types.A, klass = Classes.IN, no_validation = false) ⇒ Object

This method is much like the normal query() method except it disables the recurse flag in the packet and explicitly performs the recursion.

packet = res.query( "www.netscape.com.", "A")
packet = res.query( "www.netscape.com.", "A", "IN", true) # no validation

The Recursor maintains a cache of known nameservers. DNSSEC validation is performed unless true is passed as the fourth parameter.



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# File 'lib/Dnsruby/Recursor.rb', line 390

def query(name, type=Types.A, klass=Classes.IN, no_validation = false)
  # @TODO@ PROVIDE AN ASYNCHRONOUS SEND WHICH RETURNS MESSAGE WITH ERROR!!!
      
  # Make sure the hint servers are initialized.
  @@mutex.synchronize {
    self.hints=(Hash.new) unless @@hints
  }
  @resolver.recurse=(0)
  # Make sure the authority cache is clean.
  # It is only used to store A and AAAA records of
  # the suposedly authoritative name servers.
  # TTLs are respected
  @@mutex.synchronize {
    if (!@@zones_cache)
      Recursor.clear_caches(@resolver)
    end
  }

  # So we have normal hashes, but the array of addresses at the end is now an AddressCache
  # which respects the ttls of the A/AAAA records

  # Now see if we already know the zone in question
  # Otherwise, see if we know any of its parents (will know at least ".")
  known_zone, known_authorities = get_closest_known_zone_authorities_for(name) # ".", @hints if nothing else

  # Seed name servers with the closest known authority
  #      ret =  _dorecursion( name, type, klass, ".", @hints, 0)
  ret =  _dorecursion( name, type, klass, known_zone, known_authorities, 0, no_validation)
  Dnssec.validate(ret) if !no_validation
  #      print "\n\nRESPONSE:\n#{ret}\n"
  return ret
end