dns-packet-typescript/dist/rcaa.js

An abstract-encoding compliant module for encoding / decoding DNS packets

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.encodingLength = exports.decode = exports.encode = exports.ISSUER_CRITICAL = void 0;
var string = require("./string");
exports.ISSUER_CRITICAL = 1 << 7;
function encode(data, buf, offset) {
    if (offset === void 0) { offset = 0; }
    var len = encodingLength(data);
    if (!buf)
        buf = Buffer.allocUnsafe(encodingLength(data));
    if (!offset)
        offset = 0;
    if (data.issuerCritical) {
        data.flags = exports.ISSUER_CRITICAL;
    }
    buf.writeUInt16BE(len - 2, offset);
    offset += 2;
    buf.writeUInt8(data.flags || 0, offset);
    offset += 1;
    string.encode(data.tag, buf, offset);
    offset += string.encode.bytes;
    buf.write(data.value, offset);
    offset += Buffer.byteLength(data.value);
    encode.bytes = len;
    return buf;
}
exports.encode = encode;
encode.bytes = 0;
function decode(buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!offset)
        offset = 0;
    var len = buf.readUInt16BE(offset);
    offset += 2;
    var oldOffset = offset;
    var data = {};
    data.flags = buf.readUInt8(offset);
    offset += 1;
    data.tag = string.decode(buf, offset);
    offset += string.decode.bytes;
    data.value = buf.toString('utf-8', offset, oldOffset + len);
    data.issuerCritical = !!(data.flags & exports.ISSUER_CRITICAL);
    decode.bytes = len + 2;
    return data;
}
exports.decode = decode;
decode.bytes = 0;
function encodingLength(data) {
    return string.encodingLength(data.tag) + string.encodingLength(data.value) + 2;
}
exports.encodingLength = encodingLength;
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