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

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// NOTE: this should be EXACTLY the same as NS
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(function (exports) {
'use strict';
// The host name that represents the supplied UP address
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// May be a label, pointer or any combination
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exports.DNS_PACKER_TYPE_PTR = function (ab, dv, total, record) {
if (!record.data) {
throw new Error("no data for PTR record");
}
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// RDLENGTH
// leading len and length of string and trailing null (all dots become lengths)
dv.setUint16(total, record.data.length + 2, false);
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total += 2;
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// RDATA
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// a sequence of labels
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record.data.split('.').forEach(function (label) {
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dv.setUint8(total, label.length, false);
total += 1;
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label.split('').forEach(function (ch) {
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dv.setUint8(total, ch.charCodeAt(0), false);
total += 1;
});
});
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dv.setUint8(total, 0x00, false);
total += 1;
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return total;
};
}('undefined' !== typeof window ? window : exports));