Class: Net::DNS::RR::A

Inherits:
Net::DNS::RR show all
Defined in:
lib/Net/DNS/RR/A.rb

Overview

NAME

Net::DNS::RR::A - DNS A resource record

DESCRIPTION

Class for DNS Address (A) resource records.

head1 COPYRIGHT

Copyright © 1997-2002 Michael Fuhr.

Portions Copyright © 2002-2004 Chris Reinhardt.

All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.

head1 SEE ALSO

Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Header, Net::DNS::Question, Net::DNS::RR, RFC 1035 Section 3.4.1

Constant Summary

Constants inherited from Net::DNS::RR

RRS

Instance Attribute Summary collapse

Attributes inherited from Net::DNS::RR

#name, #rdata, #rdlength, #rrclass, #ttl, #type

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Net::DNS::RR

#_canonicalRdata, #_canonicaldata, _get_subclass, _name2wire, #_name2wire, build_regex, create, #create_rrsort_func, #data, #get_rrsort_func, #init, #init_rrsort_func, #inspect, new_from_data, new_from_hash, new_from_string, #set_rrsort_func

Instance Attribute Details

#address ⇒ Object

Returns the RR’s address field.

print "address = ", rr.address, "\n"



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# File 'lib/Net/DNS/RR/A.rb', line 46

def address
  @address
end

Class Method Details

.inet_aton(ip) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 50

def A.inet_aton ip
  ret =          ip.split(/\./).map{|c| c.to_i}.pack("C*") # .unpack("N").first
  return ret
end

.inet_ntoa(n) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 57

def A.inet_ntoa n
  ret=          n.unpack("C*").join "."
  return ret
end

Instance Method Details

#inet_aton(ip) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 47

def inet_aton ip
  A.inet_aton ip
end

#inet_ntoa(n) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 54

def inet_ntoa n
  A.inet_ntoa n
end

#new_from_data(data, offset) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 75

def new_from_data(data, offset)
  if (@rdlength > 0)
    @address = inet_ntoa(data[offset, 4]);
    #              @address = IPAddr.new_ntoh(data[offset, 4])
    #              IPAddr.new(data[offset, 4], Socket::AF_INET).to_s
  end
end

#new_from_hash(values) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 82

def new_from_hash(values)
  if (values.has_key?(:address))
    @address=values[:address]
  end
end

#new_from_string(string) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 61

def new_from_string(string)
  if (string && (string =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)\s*$/o))
    a = $1.to_i
    b = $2.to_i
    if (a >= 0) && (a <= 255) && (b >= 0) && (b <= 255)
      c = $3.to_i
      d = $4.to_i
      if (c >= 0) && (c <= 255) && (d >= 0) && (d <= 255) 
        
        @address = "#{a}.#{b}.#{c}.#{d}";
      end
    end
  end
end

#rdatastr ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 88

def rdatastr
  return @address || '';
end

#rr_rdata(*args) ⇒ Object 



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# File 'lib/Net/DNS/RR/A.rb', line 92

def rr_rdata(*args)
  if (defined?@address)
    return inet_aton(@address)
  else
    return ""
  end
end