dns-suite.js/parser/type.soa.js

(function (exports) {
'use strict';

// TODO. Not yet implemented. Do we need to include the name server and email address record properties???

// Value              Meaning/Use
// Primary NS         Variable length. The name of the Primary Master for the domain. May be a label, pointer, or any combination
// Admin MB           Variable length. The administrator's mailbox. May be a label, pointer, or any combination
// Serial Number      Unsigned 32-bit integer
// Refresh Interval   Unsigned 32-bit integer
// Retry Interval     Unsigned 32-bit integer
// Expiration Limit   Unsigned 32-bit integer
// Minimum TTL        Unsigned 32-bit integer

var unpackLabels = exports.DNS_UNPACK_LABELS || require('../dns.unpack-labels.js').DNS_UNPACK_LABELS;

exports.DNS_PARSER_TYPE_SOA = function (ab, packet, record) {

  var rdataAb = ab.slice(record.rdstart, record.rdstart + record.rdlength);
  var dv = new DataView(rdataAb);
  var cpcount = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).cpcount;
  var offset = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).byteLength;
  var labels = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).labels;
  console.log("offset is: " + offset); 
  console.log("cpcount is: " + cpcount);
  console.log("the labels are : " + labels);
  console.log("rdstart is: " + record.rdstart);
  for(var i = 0; i < dv.byteLength;i++){

    console.log(parseInt(dv.getUint8(i), 10).toString(16));
  }

  // Primary NS
  record.name_server = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).name;
  // var offset = unpackLabels(new Uint8Array(ab), record.rdstart, { byteLength: 0, cpcount: 0, labels: [], name: '' }).byteLength;
  // Admin MB. This email address is always preceeded by 6 Bytes of the name_server data and email_addr length.
  // ie: ns1.example.com, where ns1 is 3 bytes, example.com represented by 2 bytes (c0 0c - compression pointer) and then
  // 1 more byte representing the email_addr length.
  // TODO: email_addr probably shouldn't be parsed this way. The email_addr length byte is probably there to parse this in a more robust way
  // we just have to figure that out  


  if (cpcount > 0){
    // do something awesome with compression pointers to get the email address

    console.log("name server length is: " + record.name_server.length);
    var email_len = parseInt(dv.getUint8(0), 10) + ;dv.getUint16(0)
    console.log("email_start is: " + email_len);
    record.email_addr = unpackLabels(new Uint8Array(ab), record.rdstart , { byteLength: 0, cpcount: 0, labels: [], name: '' }).name;

  }
  else {

    record.email_addr = unpackLabels(new Uint8Array(ab), record.rdstart + offset, { byteLength: 0, cpcount: 0, labels: [], name: '' }).name;
  }
  // Serial Number
  record.sn = dv.getUint32(dv.byteLength - 20, false);
  // Refresh Interval
  record.ref = dv.getUint32(dv.byteLength - 16, false);
  // Retry Interval
  record.ret = dv.getUint32(dv.byteLength - 12, false);
  // Expiration Limit
  record.ex = dv.getUint32(dv.byteLength - 8, false);
  // Minimum TTL
  record.nx = dv.getUint32(dv.byteLength - 4, false);
  

  return record;

};

}('undefined' !== typeof window ? window : exports));