dns-packet-typescript/dist/question.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.NOT_QU_MASK = exports.QU_MASK = void 0;
var types = require("./types");
var classes = require("./classes");
var name = require("./name");
exports.QU_MASK = 1 << 15;
exports.NOT_QU_MASK = ~exports.QU_MASK;
function encode(q, buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!buf) {
        buf = Buffer.allocUnsafe(encodingLength(q));
    }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    name.encode(q.name, buf, offset);
    offset += name.encode.bytes;
    buf.writeUInt16BE(types.toType(q.type), offset);
    offset += 2;
    buf.writeUInt16BE(classes.toClass(q.class === undefined ? 'IN' : q.class), offset);
    offset += 2;
    encode.bytes = offset - oldOffset;
    return q;
}
exports.encode = encode;
encode.bytes = 0;
function decode(buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    var q = {};
    q.name = name.decode(buf, offset);
    offset += name.decode.bytes;
    q.type = types.toString(buf.readUInt16BE(offset));
    offset += 2;
    q.class = classes.toString(buf.readUInt16BE(offset));
    offset += 2;
    var qu = !!(q.class & exports.QU_MASK);
    if (qu) {
        q.class &= exports.NOT_QU_MASK;
    }
    decode.bytes = offset - oldOffset;
    return q;
}
exports.decode = decode;
decode.bytes = 0;
function encodingLength(q) {
    return name.encodingLength(q.name) + 4;
}
exports.encodingLength = encodingLength;
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