dns-packet-typescript/dist/ropt.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 = void 0;
var roption = require("./roption");
var utils_1 = require("./utils");
function encode(options, buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!buf) {
        buf = Buffer.allocUnsafe(encodingLength(options));
    }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    var rdlen = utils_1.encodingLengthList(options, roption);
    buf.writeUInt16BE(rdlen, offset);
    offset = utils_1.encodeList(options, roption, buf, offset + 2);
    encode.bytes = offset - oldOffset;
    return buf;
}
exports.encode = encode;
encode.bytes = 0;
function decode(buf, offset) {
    if (offset === void 0) { offset = 0; }
    if (!offset) {
        offset = 0;
    }
    var oldOffset = offset;
    var options = [];
    var rdlen = buf.readUInt16BE(offset);
    offset += 2;
    var o = 0;
    while (rdlen > 0) {
        options[o++] = roption.decode(buf, offset);
        offset += roption.decode.bytes;
        rdlen -= roption.decode.bytes;
    }
    decode.bytes = offset - oldOffset;
    return options;
}
exports.decode = decode;
decode.bytes = 0;
function encodingLength(options) {
    return 2 + utils_1.encodingLengthList(options || [], roption);
}
exports.encodingLength = encodingLength;
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