34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
(function (exports) {
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'use strict';
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// Value: IP Address
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// Meaning:Use: 16 octets represting the IP address
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exports.DNS_TYPE_AAAA = function (ab, packet, record) {
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var rdataAb = ab.slice(record.rdstart, record.rdstart + record.rdlength);
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// We can't use Uint16Array because it doesn't specify Endianness
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// Intel x86, x64, and (usually) ARM are Little Endian, but Network Order is Big Endian
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// DataView *does* let us specify endianness, so we can use that
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// http://stackoverflow.com/questions/13514614/why-is-network-byte-order-defined-to-be-big-endian
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var dv = new DataView(rdataAb);
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var i = 0;
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var s = '';
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// Note: byteLength is always 16 for AAAA records
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for (i = 0; i < dv.byteLength; i += 2) {
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if (i > 0 && i < dv.byteLength) {
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// add ':' between all... sedectets? sexdectets? ... pairs of two octets :)
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s += ':';
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}
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// Big Endian Uint16 is specified by using `false`, Little Endian is `true`
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s += dv.getUint16(i, false).toString(16);
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}
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return s;
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};
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}('undefined' !== typeof window ? window : exports));
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