Net::DNS::Codes

NAME
SYNOPSIS
DESCRIPTION
INSTALLATION
EXPORT_OK
EXPORT_TAGS
AUTHOR
COPYRIGHT
SEE ALSO

NAME

Net::DNS::Codes - collection of C library DNS codes

SYNOPSIS

  use Net::DNS::Codes qw(
        :header
        :RRs
        :constants
        :all
    (or any individual item)
  );

  --------- :header -------

  $textval = RBitsTxt->{masked_bits};
  $textval = RcodeTxt->{numeric};
  $textval = OpcodeTxt->{numeric};
  $code = (one of text below)

QR AA TC RD RA MBZ Z AD CD

BITS_QUERY BITS_IQUERY BITS_STATUS BITS_NS_NOTIFY_OP BITS_NS_UPDATE_OP

QUERY IQUERY STATUS NS_NOTIFY_OP NS_UPDATE_OP

NOERROR FORMERR SERVFAIL NXDOMAIN NOTIMP REFUSED YXDOMAIN YXRRSET NXRRSET NOTAUTH NOTZONE BADSIG BADKEY BADTIME

  ------- :RRs -------

  $textval = ClassTxt->{numeric};  
  $textval = TypeTxt->{numeric};
  $code = (one of text below)

C_IN C_CHAOS C_HS C_NONE C_ANY

T_A T_NS T_MD T_MF T_CNAME T_SOA T_MB T_MG T_MR T_NULL T_WKS T_PTR T_HINFO T_MINFO T_MX T_TXT T_RP T_AFSDB T_X25 T_ISDN T_RT T_NSAP T_NSAP_PTR T_SIG T_KEY T_PX T_GPOS T_AAAA T_LOC T_NXT T_EID T_NIMLOC T_SRV T_ATMA T_NAPTR T_KX T_CERT T_A6 T_DNAME T_SINK T_OPT T_TKEY T_TSIG T_IXFR T_AXFR T_MAILB T_MAILA T_ANY

  ------- :constants -------
  $code = (one of test below)

PACKETSZ NS_PACKETSZ MAXDNAME NS_MAXDNAME MAXCDNAME NS_MAXCDNAME MAXLABEL NS_MAXLABEL HFIXEDSZ NS_HFIXEDSZ QFIXEDSZ NS_QFIXEDSZ RRFIXEDSZ NS_RRFIXEDSZ INT32SZ NS_INT32SZ INT16SZ NS_INT16SZ NS_INT8SZ INADDRSZ NS_INADDRSZ IN6ADDRSZ NS_IN6ADDRSZ INDIR_MASK NS_CMPRSFLGS NAMESERVER_PORT NS_DEFAULTPORT


  $code = INT8SZ (not a DNS code, added for convenience)

DESCRIPTION

Net::DNS::Codes provides forward and reverse lookup for most common C library DNS codes as well as all the codes for the DNS HEADER field.

$bitmask = XX

  Return the bitmask for the code:

   15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
  |QR|   Opcode  |AA|TC|RD|RA| Z|AD|CD|   Rcode   |
  +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15

  QR            =>      1000_0000_0000_0000
  BitsOpcode    =>      Opcode binary value
                        left shifted 11 bits
  AA            =>      100_0000_0000
  TC            =>      10_0000_0000
  RD            =>      1_0000_0000
  RA            =>      1000_0000
  MBZ or Z      =>      100_0000
  AD            =>      10_0000
  CD            =>      1_0000
  Rcode         =>      Rcode binary value

  where BitsOpcode =

  BITS_QUERY        =>    0, 
  BITS_IQUERY       =>    1000_0000_0000 # 1 << 11
  BITS_STATUS       =>  1_0000_0000_0000 # 2 << 11
  BITS_NS_NOTIFY_OP => 10_0000_0000_0000 # 4 << 11
  BITS_NS_UPDATE_OP => 10_1000_0000_0000 # 5 << 11

$textval = RBitsTxt->{masked_bits};

Returns the TEXT string for the bit fields above.

  NOTE: that MBZ and Z have the same value. 
  The text string 'MBZ' is returned for 0x1 << 6

$textval = RcodeTxt->{numeric};

  Return the TEXT string for numeric code.

        NOERROR         => 0,
        FORMERR         => 1,
        SERVFAIL        => 2,
        NXDOMAIN        => 3,
        NOTIMP          => 4,
        REFUSED         => 5,
        YXDOMAIN        => 6,
        YXRRSET         => 7,
        NXRRSET         => 8,
        NOTAUTH         => 9,
        NOTZONE         => 10,
        BADSIG          => 16,
        BADKEY          => 17,
        BADTIME         => 18,

$textval = OpcodeTxt->{numeric};

  Return the TEXT string for numeric code.

        QUERY           => 0,
        IQUERY          => 1,
        STATUS          => 2, 
        NS_NOTIFY_OP    => 4, 
        NS_UPDATE_OP    => 5,

$textval = ClassTxt->{numeric};

  Return the TEXT string for numeric code.

        C_IN        => 1,
        C_CHAOS  => 3,
        C_HS        => 4,
        C_NONE    => 254,
        C_ANY      => 255,

(various constants)

  PACKETSZ        NS_PACKETSZ     512
  MAXDNAME        NS_MAXDNAME     1025
  MAXCDNAME       NS_MAXCDNAME    255 
  MAXLABEL        NS_MAXLABEL     63  
  HFIXEDSZ        NS_HFIXEDSZ     12  
  QFIXEDSZ        NS_QFIXEDSZ     4   
  RRFIXEDSZ       NS_RRFIXEDSZ    10  
  INT32SZ         NS_INT32SZ      4   
  INT16SZ         NS_INT16SZ      2   
  INT8SZ          NS_INT8SZ       1   
  INADDRSZ        NS_INADDRSZ     4   
  IN6ADDRSZ       NS_IN6ADDRSZ    16  
  INDIR_MASK      NS_CMPRSFLGS    0xc0
  NAMESERVER_PORT NS_DEFAULTPORT  53

INSTALLATION

To install this module, type:

        perl Makfile.PL
        make
        make test
        make install

EXPORT_OK

  ------- for tag :header -------

RBitsTxt RcodeTxt OpcodeTxt

QR AA TC RD RA MBZ Z AD CD

BITS_QUERY BITS_IQUERY BITS_STATUS BITS_NS_NOTIFY_OP BITS_NS_UPDATE_OP

QUERY IQUERY STATUS NS_NOTIFY_OP NS_UPDATE_OP

NOERROR FORMERR SERVFAIL NXDOMAIN NOTIMP REFUSED YXDOMAIN YXRRSET NXRRSET NOTAUTH NOTZONE BADSIG BADKEY BADTIME

  ------- for tag :RRs -------

  $textval = ClassTxt->{numeric};  
  $textval = TypeTxt->{numeric};
  $code = (one of text below)

C_IN C_CHAOS C_HS C_NONE C_ANY

  ------- for tag :constants -------

EXPORT_TAGS

        :header
        :RRs
        :constants
        :all

AUTHOR

Michael Robinton, michael@bizsystems.com

COPYRIGHT

Copyright 2003, Michael Robinton & BizSystems This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.