48 lines
1.2 KiB
JavaScript
48 lines
1.2 KiB
JavaScript
(function (exports) {
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'use strict';
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// Record type is just any text.
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// RFC 1035 - 3.3. Standard RRs - <character-string>
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// RFC 1035 - 3.3.14. TXT RDATA format
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exports.DNS_PACKER_TYPE_TXT = function (ab, dv, total, record) {
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if ('string' === typeof record.data) {
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console.warn("[WARN] 'data' should be an array of strings, not a single string");
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record.data = [ record.data ];
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}
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if (!Array.isArray(record.data) || !record.data.length){
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throw new Error("bad data or no data for TXT record");
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}
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var txtLen = 0;
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var rdLenIndex = total;
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total += 2; // saving space for rdata length
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// RDATA
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record.data.forEach(function(str){
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if (str.length > 255) {
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throw new Error("bad TXT string length " + str.length + " (max 255)");
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}
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// size of this string
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dv.setUint8(total, str.length, false);
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total += 1;
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txtLen += 1;
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str.split('').forEach(function(ch) {
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dv.setUint8(total, ch.charCodeAt(0), false);
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total += 1;
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txtLen += 1;
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});
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});
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dv.setUint16(rdLenIndex, txtLen, false);
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return total;
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};
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}('undefined' !== typeof window ? window : exports));
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