dns-suite.js/packer/type.cname.js

38 lines
819 B
JavaScript

(function (exports) {
'use strict';
// A 'CNAME' record is a 32-bit value representing the IP address
exports.DNS_PACKER_TYPE_CNAME = function (ab, dv, total, record) {
if (!record.data) {
throw new Error("no data for CNAME record");
}
var cnameLen = 0;
var rdLenIndex = total;
total += 2;
// RDATA
// a sequence of labels
record.data.split('.').forEach(function (label) {
cnameLen += 1 + label.length;
dv.setUint8(total, label.length, false);
total += 1;
label.split('').forEach(function (ch) {
dv.setUint8(total, ch.charCodeAt(0), false);
total += 1;
});
});
dv.setUint8(total, 0x00, false);
total += 1;
// RDLENGTH
dv.setUint16(rdLenIndex, record.data.length + 2, false);
return total;
};
}('undefined' !== typeof window ? window : exports));