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Rewriting of backend
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This commit is contained in:
Fabian Stamm 2018-11-30 21:48:27 +01:00
parent e8dcf31461
commit 69094524d1
27 changed files with 3215 additions and 3069 deletions
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1
.drone.yml
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@ -4,4 +4,5 @@ pipeline:
commands:
- node --version && npm --version
- npm install
- npm run build
- npm test

3
.gitignore vendored
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@ -1,3 +1,4 @@
node_modules
*.pcapng
*.bin
*.bin
lib/

4
lib/index.d.ts vendored
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import * as Types from "./types";
import * as Request from "./request";
declare const _default: typeof Types & typeof Request;
export = _default;

5
lib/index.js
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"use strict";
const Types = require("./types");
const Request = require("./request");
module.exports = Object.assign({}, Types, Request);
//# sourceMappingURL=index.js.map

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lib/index.js.map
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{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";AAAA,iCAAiC;AACjC,qCAAoC;AAEpC,iBAAU,MAAM,CAAC,MAAM,CAAC,EAAE,EAAE,KAAK,EAAE,OAAO,CAAC,CAAC"}

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lib/request.d.ts vendored
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/// <reference types="node" />
import { IMessage, IMessageHeader, IMessageQuestion, MessageRecourceRecord, ErrorCodes } from "./types";
export declare function parseHeader(data: Buffer): IMessageHeader;
export declare function parseQuestions(count: number, packet: Buffer): IMessageQuestion[];
export declare function serializeName(name: string): Buffer;
export declare class Request implements IMessage {
private sendCallback;
private max_size;
private _header;
readonly header: Header;
private _questions;
readonly questions: Question[];
answers: RecourceRecord[];
authorities: RecourceRecord[];
additionals: RecourceRecord[];
constructor(packet: Buffer, sendCallback: (packet: Buffer) => any, max_size?: number);
error(error: ErrorCodes): void;
noRecursion(): void;
send(): void;
serialize(): Buffer;
}
export declare class Header implements IMessageHeader {
ID: number;
QR: 0 | 1;
OPCODE: number;
AA: 0 | 1;
TC: 0 | 1;
RD: 0 | 1;
RA: 0 | 1;
Z: 0 | 1;
AD: 0 | 1;
CD: 0 | 1;
RCODE: ErrorCodes;
QDCOUNT: number;
ANCOUNT: number;
NSCOUNT: number;
ARCOUNT: number;
constructor(header: IMessageHeader);
serialize(): Buffer;
}
export declare class Question implements IMessageQuestion {
QNAME: string;
QTYPE: number;
QCLASS: number;
constructor(question: IMessageQuestion);
serialize(): Buffer;
}
export declare class RecourceRecord implements MessageRecourceRecord {
constructor(data?: Partial<MessageRecourceRecord>);
/**
* This value can be set to identify if specific record is already set
*/
Identifier: string;
NAME: string;
private _TYPE;
TYPE: number;
private _CLASS;
CLASS: number;
private _TTL;
TTL: number;
RDATA: Buffer;
readonly RDLENGTH: number;
serialize(): Buffer;
}

262
lib/request.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const binary_parser_1 = require("binary-parser");
const types_1 = require("./types");
const headerParser = new binary_parser_1.Parser()
.endianess("big")
.uint16("ID")
.bit1("QR")
.bit4("OPCODE")
.bit1("AA")
.bit1("TC")
.bit1("RD")
.bit1("RA")
.bit1("Z")
.bit1("AD")
.bit1("CD")
.bit4("RCODE")
.uint16("QDCOUNT")
.uint16("ANCOUNT")
.uint16("NSCOUNT")
.uint16("ARCOUNT");
function parseHeader(data) {
try {
return headerParser.parse(data);
}
catch (e) {
throw new Error("Header parsing failed" + e.message);
}
}
exports.parseHeader = parseHeader;
const labelParser = new binary_parser_1.Parser()
.endianess("big")
.uint8("dataLength")
.string("name", {
length: "dataLength",
encoding: "ascii"
});
const questionParser = new binary_parser_1.Parser()
.endianess("big")
.array("QNAME", {
type: labelParser,
readUntil: (item, buffer) => {
if (item.dataLength <= 0)
return true;
},
formatter: (value) => {
return value.map(e => e.name).join(".").slice(0, -1);
}
})
.uint16("QTYPE")
.uint16("QCLASS");
function parseQuestions(count, packet) {
try {
return new binary_parser_1.Parser()
.endianess("big")
.array("questions", {
type: questionParser,
length: count
}).parse(packet).questions;
}
catch (e) {
throw new Error("Question parsing failed" + e.message);
}
}
exports.parseQuestions = parseQuestions;
const MAX_LABEL_SIZE = 63;
function serializeName(name) {
let length = 0;
let parts = name.split(".");
parts.forEach(e => {
// Length of part and byte that holds the length information
if (e.length > MAX_LABEL_SIZE)
throw new Error("Label to large");
length += e.length + 1;
});
length += 1; //Adding last 0 length octet
let data = Buffer.alloc(length);
let offset = 0;
parts.forEach(e => {
data.writeUInt8(e.length, offset);
offset++;
data.write(e, offset, e.length);
offset += e.length;
});
data.writeUInt8(0, offset);
return data;
}
exports.serializeName = serializeName;
class Request {
constructor(packet, sendCallback, max_size = 512) {
this.sendCallback = sendCallback;
this.max_size = max_size;
this.answers = [];
this.authorities = [];
this.additionals = [];
let headerData = Buffer.alloc(12);
packet.copy(headerData, 0, 0, 12);
let bodyData = Buffer.alloc(packet.length - 12);
packet.copy(bodyData, 0, 12, packet.length);
this._header = new Header(parseHeader(headerData));
this._header.AD = 0;
this._header.RCODE = types_1.ErrorCodes.NoError;
this._header.RA = this._header.RD;
this._questions = parseQuestions(this._header.QDCOUNT, bodyData).map(e => new Question(e));
}
get header() {
return Object.assign({}, this._header);
}
get questions() {
return this._questions.map(e => Object.assign({}, e));
}
error(error) {
if (this._header.RCODE === types_1.ErrorCodes.NoError)
this._header.RCODE = error;
}
noRecursion() {
this._header.RA = 0;
}
send() {
this.sendCallback(this.serialize());
}
serialize() {
this._header.AA = 1;
this._header.ANCOUNT = this.answers.length;
this._header.ARCOUNT = this.additionals.length;
this._header.NSCOUNT = this.authorities.length;
this._header.QR = 1;
let questions = this._questions.map(e => e.serialize());
let answers = this.answers.map(e => e.serialize());
let authority = this.authorities.map(e => e.serialize());
let additional = this.additionals.map(e => e.serialize());
let length = 12;
questions.forEach(e => length += e.length);
answers.forEach(e => length += e.length);
authority.forEach(e => length += e.length);
additional.forEach(e => length += e.length);
if (length > this.max_size) {
this._header.TC = 1;
//Will ignore data, that exceeds length
length = this.max_size;
}
let header = this._header.serialize();
let data = Buffer.alloc(length);
let offset = 0;
let append = (buffer) => {
if (offset <= length) {
buffer.copy(data, offset, 0, buffer.length);
offset += buffer.length;
}
};
append(header);
questions.forEach(append);
answers.forEach(append);
authority.forEach(append);
additional.forEach(append);
return data;
}
}
exports.Request = Request;
class Header {
constructor(header) {
for (let k in header) {
this[k] = header[k];
}
}
serialize() {
let data = Buffer.alloc(12);
data.writeUInt16BE(this.ID, 0);
var f = 0x0000;
f = f | (this.QR << 15);
f = f | (this.OPCODE << 11);
f = f | (this.AA << 10);
f = f | (this.TC << 9);
f = f | (this.RD << 8);
f = f | (this.RA << 7);
f = f | (this.Z << 6);
f = f | (this.AD << 5);
f = f | (this.CD << 4);
f = f | this.RCODE;
data.writeUInt16BE(f, 2);
data.writeUInt16BE(this.QDCOUNT, 4);
data.writeUInt16BE(this.ANCOUNT, 6);
data.writeUInt16BE(this.NSCOUNT, 8);
data.writeUInt16BE(this.ARCOUNT, 10);
return data;
}
}
exports.Header = Header;
class Question {
constructor(question) {
for (let k in question) {
this[k] = question[k];
}
}
serialize() {
let qname = serializeName(this.QNAME);
let data = Buffer.alloc(qname.length + 4);
qname.copy(data, 0, 0, qname.length);
let offset = qname.length;
data.writeUInt16BE(this.QTYPE, offset);
offset += 2;
data.writeUInt16BE(this.QCLASS, offset);
return data;
}
}
exports.Question = Question;
class RecourceRecord {
constructor(data) {
if (data) {
for (let key in data) {
this[key] = data[key];
}
}
}
set TYPE(value) {
if (value < 0 || value > 65535)
throw new TypeError("TYPE Range: 0 - 65.535");
this._TYPE = value;
}
get TYPE() {
return this._TYPE;
}
set CLASS(value) {
if (value < 0 || value > 65535)
throw new TypeError("CLASS Range: 0 - 65.535");
this._CLASS = value;
}
get CLASS() {
return this._CLASS;
}
set TTL(value) {
if (value < 0 || value > 4294967295)
throw new TypeError("TTL Range: 0 - 4.294.967.295");
this._TTL = value;
}
get TTL() {
return this._TTL;
}
get RDLENGTH() {
return this.RDATA.length;
}
serialize() {
// TODO: Implement compression
let name = serializeName(this.NAME);
let rdata = this.RDATA;
let data = Buffer.alloc(name.length + 10 + rdata.length); // For TYPE, CLASS, TTL, RLENGTH
name.copy(data, 0, 0, name.length);
let offset = name.length;
data.writeUInt16BE(this.TYPE, offset);
offset += 2;
data.writeUInt16BE(this.CLASS, offset);
offset += 2;
data.writeUInt32BE(this._TTL, offset);
offset += 4;
data.writeUInt16BE(rdata.length, offset);
offset += 2;
rdata.copy(data, offset, 0, rdata.length);
return data;
}
}
exports.RecourceRecord = RecourceRecord;
//# sourceMappingURL=request.js.map

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lib/request.js.map
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1
lib/test.d.ts vendored
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export {};

361
lib/test.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const chai_1 = require("chai");
const request_1 = require("./request");
const types_1 = require("./types");
function fromHex(data) {
return Buffer.from(data.replace(/\s/g, ""), "hex");
}
describe("parser", function () {
describe("header", function () {
describe("header parser", function () {
let should_templ = {
ID: 0,
QR: 0,
OPCODE: 0,
AA: 0,
TC: 0,
RD: 0,
RA: 0,
Z: 0,
AD: 0,
CD: 0,
RCODE: 0,
QDCOUNT: 0,
ANCOUNT: 0,
ARCOUNT: 0,
NSCOUNT: 0
};
let tests = [
{
name: "Testing ID field",
data: "0001 0000 0000 0000 0000 0000",
fields: {
ID: 1
}
},
{
name: "Testing ID field with max value",
data: "FFFF 0000 0000 0000 0000 0000",
fields: {
ID: 65535
}
},
{
name: "Testing QR field",
data: "0000 8000 0000 0000 0000 0000",
fields: {
QR: 1
}
},
{
name: "Testing OPCODE field value 2",
data: "0000 1000 0000 0000 0000 0000",
fields: {
OPCODE: 2
}
},
{
name: "Testing OPCODE field value 1",
data: "0000 0800 0000 0000 0000 0000",
fields: {
OPCODE: 1
}
},
{
name: "Testing AA field",
data: "0000 0400 0000 0000 0000 0000",
fields: {
AA: 1
}
},
{
name: "Testing TC field",
data: "0000 0200 0000 0000 0000 0000",
fields: {
TC: 1
}
},
{
name: "Testing RD field",
data: "0000 0100 0000 0000 0000 0000",
fields: {
RD: 1
}
},
{
name: "Testing RCODE field",
data: "0000 0002 0000 0000 0000 0000",
fields: {
RCODE: 2
}
},
{
name: "Testing QDCOUNT field max value",
data: "0000 0000 FFFF 0000 0000 0000",
fields: {
QDCOUNT: 65535
}
},
{
name: "Testing ANCOUNT field max value",
data: "0000 0000 0000 FFFF 0000 0000",
fields: {
ANCOUNT: 65535
}
},
{
name: "Testing NSCOUNT field max value",
data: "0000 0000 0000 0000 FFFF 0000",
fields: {
NSCOUNT: 65535
}
},
{
name: "Testing ARCOUNT field max value",
data: "0000 0000 0000 0000 0000 FFFF",
fields: {
ARCOUNT: 65535
}
},
{
name: "Testing all Flags and Values max",
data: "FFFF FFFF FFFF FFFF FFFF FFFF",
fields: {
ID: 65535,
QR: 1,
OPCODE: 15,
AA: 1,
TC: 1,
RD: 1,
RA: 1,
Z: 1,
AD: 1,
CD: 1,
RCODE: 15,
QDCOUNT: 65535,
ANCOUNT: 65535,
NSCOUNT: 65535,
ARCOUNT: 65535
}
}
];
tests.forEach(function (e) {
it(e.name, function () {
let testdata = fromHex(e.data);
let should = Object.assign({}, should_templ, e.fields); // Build in "clone" function
let header = request_1.parseHeader(testdata);
chai_1.assert.hasAllKeys(header, Object.keys(should), "Parsed header is missing some fields");
chai_1.assert.deepEqual(header, should, "Parsed header has not expected values!");
});
});
});
describe("header serializer", function () {
let empty_header = {
ID: 0,
QR: 0,
OPCODE: 0,
AA: 0,
TC: 0,
RD: 0,
RA: 0,
Z: 0,
AD: 0,
CD: 0,
RCODE: 0,
QDCOUNT: 0,
ANCOUNT: 0,
ARCOUNT: 0,
NSCOUNT: 0
};
let tests = [
{
name: "Fill header with 0s",
result: "0000 0000 0000 0000 0000 0000",
values: {}
},
{
name: "Set header id to 5",
result: "0005 0000 0000 0000 0000 0000",
values: {
ID: 5
}
},
{
name: "Set QR",
result: "0000 8000 0000 0000 0000 0000",
values: {
QR: 1
}
},
{
name: "Set OPCODE",
result: "0000 7800 0000 0000 0000 0000",
values: {
OPCODE: 15
}
},
{
name: "Set AA",
result: "0000 0400 0000 0000 0000 0000",
values: {
AA: 1
}
},
{
name: "Set TC",
result: "0000 0200 0000 0000 0000 0000",
values: {
TC: 1
}
},
{
name: "Set RD",
result: "0000 0100 0000 0000 0000 0000",
values: {
RD: 1
}
},
{
name: "Set RA",
result: "0000 0080 0000 0000 0000 0000",
values: {
RA: 1
}
},
{
name: "Set Z",
result: "0000 0040 0000 0000 0000 0000",
values: {
Z: 1
}
},
{
name: "Set AD",
result: "0000 0020 0000 0000 0000 0000",
values: {
AD: 1
}
},
{
name: "Set CD",
result: "0000 0010 0000 0000 0000 0000",
values: {
CD: 1
}
},
{
name: "Set RCODE",
result: "0000 000F 0000 0000 0000 0000",
values: {
RCODE: 15
}
},
{
name: "Set QDCOUNT",
result: "0000 0000 FFFF 0000 0000 0000",
values: {
QDCOUNT: 65535
}
},
{
name: "Set ANCOUNT",
result: "0000 0000 0000 FFFF 0000 0000",
values: {
ANCOUNT: 65535
}
},
{
name: "Set NSCOUNT",
result: "0000 0000 0000 0000 FFFF 0000",
values: {
NSCOUNT: 65535
}
},
{
name: "Set ARCOUNT",
result: "0000 0000 0000 0000 0000 FFFF",
values: {
ARCOUNT: 65535
}
},
];
tests.forEach(function (e) {
it(e.name, function () {
let header = Object.assign({}, empty_header, e.values);
let serialized = new request_1.Header(header).serialize();
chai_1.assert.equal(serialized.toString("hex"), e.result.replace(/\s/g, "").toLowerCase(), "Header serialization failed");
});
});
});
});
describe("question", function () {
let questionData = fromHex("0474 6573 7407 6578 616d 706c 6503 636f 6d00 0001 0001");
let questionObj = {
QNAME: "test.example.com",
QTYPE: types_1.QueryTypes.A,
QCLASS: 1
};
it("check question parser with one question", function () {
let res = request_1.parseQuestions(1, questionData);
let should = [questionObj];
chai_1.assert.deepEqual(res, should, "Question parser does not parse input correctly");
});
it("check question serialization", function () {
let res = new request_1.Question(questionObj).serialize();
chai_1.assert.equal(res.toString("hex"), questionData.toString("hex"), "Query serializer does not serialite correctly");
});
});
it("recource record serialization", function () {
let should = "07 6578616D706C65 03 636f6D 00 0001 0001 00000640 0004 0A000001";
let rr = new request_1.RecourceRecord();
rr.CLASS = 1;
rr.NAME = "example.com";
rr.TTL = 1600;
rr.TYPE = 1;
rr.RDATA = fromHex("0A 00 00 01");
let res = rr.serialize().toString("hex");
chai_1.assert.equal(res, should.replace(/\s/g, "").toLowerCase(), "Serialization not working properly");
});
it("recource record constructor value assign", function () {
let should = "07 6578616D706C65 03 636f6D 00 0001 0001 00000640 0004 0A000001";
let rr = new request_1.RecourceRecord({
CLASS: 1,
NAME: "example.com",
TTL: 1600,
TYPE: 1,
RDATA: fromHex("0A 00 00 01")
});
let res = rr.serialize().toString("hex");
chai_1.assert.equal(res, should.replace(/\s/g, "").toLowerCase(), "Serialization not working properly");
});
it("full response serialization", function () {
let reqData = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
let should = "E835 8580 0001000100000000 076578616D706C6503636F6D0000010001 07 6578616D706C65 03 636F6D 00 0001 0001 0000 0640 0004 0A000001";
let request = new request_1.Request(reqData, () => null);
let rr = new request_1.RecourceRecord();
rr.CLASS = 1;
rr.NAME = "example.com";
rr.TTL = 1600;
rr.TYPE = 1;
rr.RDATA = fromHex("0A 00 00 01");
request.answers.push(rr);
let data = request.serialize();
chai_1.assert.equal(data.toString("hex"), should.replace(/\s/g, "").toLowerCase(), "Whole packet serialization failed");
});
// it("full response serialization benchmark", function () {
// let reqData = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
// for (let i = 0; i < 100; i++) {
// let request = new Request(reqData, () => null)
// let rr = new RecourceRecord()
// rr.CLASS = 1
// rr.NAME = "example.com"
// rr.TTL = 1600
// rr.TYPE = 1
// rr.RDATA = fromHex("0A 00 00 01")
// request.answers.push(rr)
// request.serialize()
// }
// })
});
//# sourceMappingURL=test.js.map

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/// <reference types="node" />
export declare enum ErrorCodes {
/**
* No error
*/
NoError = 0,
/**
* Format error - unable to interpret query
*/
FormatError = 1,
/**
* Server failure - internal problem
*/
ServerFailure = 2,
/**
* Name error - Only for authorative name server, domain name of query does not exist
*/
NameError = 3,
/**
* Not implemented - Request not supported
*/
NotImplemented = 4,
/**
* Refused - Nameserver refuses request
*/
Refused = 5,
}
export declare enum QueryTypes {
/**
* IPv4 address
*/
A = 1,
/**
* Nameserver
*/
NS = 2,
/**
* Obsolete
*/
MD = 3,
/**
* Obsolete
*/
MF = 4,
/**
* Alias
*/
CNAME = 5,
/**
* Start of authority
*/
SOA = 6,
/**
* Experimental
*/
MB = 7,
/**
* Experimental
*/
MG = 8,
/**
* Experimental
*/
MR = 9,
/**
* Experimental
*/
NULL = 10,
/**
* Service description
*/
WKS = 11,
/**
* Reverse entry (inaddr.arpa)
*/
PTR = 12,
/**
* Host information
*/
HINFO = 13,
/**
* Mailbox / Mail-list information
*/
MINFO = 14,
/**
* Mail exchange
*/
MX = 15,
/**
* Text strings
*/
TXT = 16,
/**
* IPv6 address
*/
AAAA = 28,
/**
* SRV records
*/
SRV = 33,
/**
* Request to transfer entire zone
*/
AXFR = 252,
/**
* Request for mailbox related records
*/
MAILA = 254,
/**
* Request for mail agend RRs
*/
MAILB = 253,
/**
* Any class
*/
ANY = 255,
}
export interface IMessageHeader {
/**
* A 16 bit identifier assigned by the program that
* generates any kind of query. This identifier is copied
* the corresponding reply and can be used by the requester
* to match up replies to outstanding queries.
*/
ID: number;
/**
* Defines if query or response
*/
QR: 0 | 1;
/**
* 4 Bit code, that defines type of query.
* 0 Standard query
* 1 Inverse query
* 2 Server status request
* 3-15 reserved for future use
*/
OPCODE: number;
/**
* Authorative Answer - only valid in responses and
* specifies that the responding name server is an
* authority for the domain name in question section
*/
AA: 0 | 1;
/**
* Truncation - specifies that his message was truncated doe to
* length grater than permitted on the transaction channel
*
* WARNING: NOT IMPLEMENTED IN THIS APPLICATION
*/
TC: 0 | 1;
/**
* Recursion Desired - set in query and copied to response
* if is set, directs name server to pursue the query recursively
*
* WARNING: NOT IMPLEMENTED IN THIS APPLICATION
*/
RD: 0 | 1;
/**
* Recursion Available - will be cleared in response to
* show the client that recursion is not available
*/
RA: 0 | 1;
/**
* Reserved for future usage, must be 0 in all queries
*/
Z: 0 | 1;
AD: 0 | 1;
CD: 0 | 1;
/**
* Response Code - 4 bit field is part of response
*
* 0 No error condition
* 1 Format error - unable to interpret query
* 2 Server failure - internal problem
* 3 Name error - Only for authorative name server, domain name of query does not exist
* 4 Not implemented - Request not supported
* 5 Refused - Nameserver refuses request
* 6-15 Reserved for future usage
*/
RCODE: ErrorCodes;
/**
* Number of entries in question section
* uint16
*/
QDCOUNT: number;
/**
* Number of entries in answer section
* uint16
*/
ANCOUNT: number;
/**
* Number of resource records in authority records section
* uint16
*/
NSCOUNT: number;
/**
* Number of resource records in additional records section
* uint16
*/
ARCOUNT: number;
}
export interface IMessageQuestion {
/**
* Domain name represented as sequence of labels
* Each label consists of a length octed followed
* by that number of octeds
*/
QNAME: string;
/**
* Two octed code wich specifies the type of the query.
*/
QTYPE: number;
/**
* Two octed code that specifies the class of the Query
* IS for internet
* WARNING: ONLY IN IS SUPPORTED BY THIS APPLICATION
*/
QCLASS: number;
}
export interface MessageRecourceRecord {
/**
* Domain name to wich resource record pertains
*/
NAME: string;
/**
* Two octets containing TT type code.
* Specifies meaning of data in RDATA field
*
* uint16
*/
TYPE: number;
/**
* Two octets specifying class of RDATA field
*
* uint16
*/
CLASS: number;
/**
* Specifies Time Interval (in seconds) that the record
* may be cached before discarded.
* Zero values are not cached
*
* uint32
*/
TTL: number;
/**
* Length of RDATA field
*
* uint16
*/
RDLENGTH: number;
/**
* a variable length string of ectets taht describes
* the resource. The format is defined by TYPE and CLASS
* field.
*
* If TYPE is A and CLASS is IN, RDATA is a 4 octet
* ARPA internet address.
*/
RDATA: Buffer;
}
export interface IMessage {
header: IMessageHeader;
questions: IMessageQuestion[];
answers: MessageRecourceRecord[];
authorities: MessageRecourceRecord[];
additionals: MessageRecourceRecord[];
}

121
lib/types.js
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@ -1,121 +0,0 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var ErrorCodes;
(function (ErrorCodes) {
/**
* No error
*/
ErrorCodes[ErrorCodes["NoError"] = 0] = "NoError";
/**
* Format error - unable to interpret query
*/
ErrorCodes[ErrorCodes["FormatError"] = 1] = "FormatError";
/**
* Server failure - internal problem
*/
ErrorCodes[ErrorCodes["ServerFailure"] = 2] = "ServerFailure";
/**
* Name error - Only for authorative name server, domain name of query does not exist
*/
ErrorCodes[ErrorCodes["NameError"] = 3] = "NameError";
/**
* Not implemented - Request not supported
*/
ErrorCodes[ErrorCodes["NotImplemented"] = 4] = "NotImplemented";
/**
* Refused - Nameserver refuses request
*/
ErrorCodes[ErrorCodes["Refused"] = 5] = "Refused";
})(ErrorCodes = exports.ErrorCodes || (exports.ErrorCodes = {}));
var QueryTypes;
(function (QueryTypes) {
/**
* IPv4 address
*/
QueryTypes[QueryTypes["A"] = 1] = "A";
/**
* Nameserver
*/
QueryTypes[QueryTypes["NS"] = 2] = "NS";
/**
* Obsolete
*/
QueryTypes[QueryTypes["MD"] = 3] = "MD";
/**
* Obsolete
*/
QueryTypes[QueryTypes["MF"] = 4] = "MF";
/**
* Alias
*/
QueryTypes[QueryTypes["CNAME"] = 5] = "CNAME";
/**
* Start of authority
*/
QueryTypes[QueryTypes["SOA"] = 6] = "SOA";
/**
* Experimental
*/
QueryTypes[QueryTypes["MB"] = 7] = "MB";
/**
* Experimental
*/
QueryTypes[QueryTypes["MG"] = 8] = "MG";
/**
* Experimental
*/
QueryTypes[QueryTypes["MR"] = 9] = "MR";
/**
* Experimental
*/
QueryTypes[QueryTypes["NULL"] = 10] = "NULL";
/**
* Service description
*/
QueryTypes[QueryTypes["WKS"] = 11] = "WKS";
/**
* Reverse entry (inaddr.arpa)
*/
QueryTypes[QueryTypes["PTR"] = 12] = "PTR";
/**
* Host information
*/
QueryTypes[QueryTypes["HINFO"] = 13] = "HINFO";
/**
* Mailbox / Mail-list information
*/
QueryTypes[QueryTypes["MINFO"] = 14] = "MINFO";
/**
* Mail exchange
*/
QueryTypes[QueryTypes["MX"] = 15] = "MX";
/**
* Text strings
*/
QueryTypes[QueryTypes["TXT"] = 16] = "TXT";
/**
* IPv6 address
*/
QueryTypes[QueryTypes["AAAA"] = 28] = "AAAA";
/**
* SRV records
*/
QueryTypes[QueryTypes["SRV"] = 33] = "SRV";
/**
* Request to transfer entire zone
*/
QueryTypes[QueryTypes["AXFR"] = 252] = "AXFR";
/**
* Request for mailbox related records
*/
QueryTypes[QueryTypes["MAILA"] = 254] = "MAILA";
/**
* Request for mail agend RRs
*/
QueryTypes[QueryTypes["MAILB"] = 253] = "MAILB";
/**
* Any class
*/
QueryTypes[QueryTypes["ANY"] = 255] = "ANY";
})(QueryTypes = exports.QueryTypes || (exports.QueryTypes = {}));
//# sourceMappingURL=types.js.map

1
lib/types.js.map
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@ -1 +0,0 @@
{"version":3,"file":"types.js","sourceRoot":"","sources":["../src/types.ts"],"names":[],"mappings":";;AAAA,IAAY,UA8BX;AA9BD,WAAY,UAAU;IACnB;;OAEG;IACH,iDAAW,CAAA;IAEX;;OAEG;IACH,yDAAW,CAAA;IAEX;;OAEG;IACH,6DAAa,CAAA;IAEb;;OAEG;IACH,qDAAS,CAAA;IAET;;OAEG;IACH,+DAAc,CAAA;IAEd;;OAEG;IACH,iDAAO,CAAA;AACV,CAAC,EA9BW,UAAU,GAAV,kBAAU,KAAV,kBAAU,QA8BrB;AAED,IAAY,UA8GX;AA9GD,WAAY,UAAU;IACnB;;OAEG;IACH,qCAAQ,CAAA;IAER;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,6CAAY,CAAA;IAEZ;;OAEG;IACH,yCAAU,CAAA;IAEV;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,uCAAS,CAAA;IAET;;OAEG;IACH,4CAAW,CAAA;IAEX;;OAEG;IACH,0CAAU,CAAA;IAEV;;OAEG;IACH,0CAAU,CAAA;IAEV;;OAEG;IACH,8CAAY,CAAA;IAEZ;;OAEG;IACH,8CAAY,CAAA;IAEZ;;OAEG;IACH,wCAAS,CAAA;IAET;;OAEG;IACH,0CAAU,CAAA;IAEV;;OAEG;IACH,4CAAW,CAAA;IAEX;;OAEG;IACH,0CAAU,CAAA;IAEV;;OAEG;IACH,6CAAW,CAAA;IAEX;;OAEG;IACH,+CAAY,CAAA;IAEZ;;OAEG;IACH,+CAAY,CAAA;IAEZ;;OAEG;IACH,2CAAU,CAAA;AACb,CAAC,EA9GW,UAAU,GAAV,kBAAU,KAAV,kBAAU,QA8GrB"}

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21
package.json
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@ -8,21 +8,24 @@
"scripts": {
"build": "tsc",
"watch": "tsc --watch",
"prepublish": "tsc",
"test": "mocha src/test.ts --require ts-node/register",
"testwatch": "mocha src/test.ts --require ts-node/register --watch --watch-extensions ts"
},
"devDependencies": {
"@types/binary-parser": "^1.3.0",
"@types/chai": "^4.1.3",
"@types/mocha": "^5.2.0",
"@types/node": "^10.0.8",
"chai": "^4.1.2",
"mocha": "^5.1.1",
"nodemon": "^1.17.4",
"typescript": "^2.8.3",
"ts-node": "^6.0.3"
"@types/chai": "^4.1.7",
"@types/lru-cache": "^4.1.1",
"@types/mocha": "^5.2.5",
"@types/node": "^10.12.11",
"chai": "^4.2.0",
"mocha": "^5.2.0",
"nodemon": "^1.18.7",
"ts-node": "^7.0.1",
"typescript": "^3.2.1"
},
"dependencies": {
"binary-parser": "^1.3.2"
"binary-parser": "^1.3.2",
"lru-cache": "^5.1.1"
}
}

75
src/header.ts Normal file
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@ -0,0 +1,75 @@
import { IMessageHeader, ErrorCodes } from "./types";
import { Serializeable } from "./serializeable";
export class Header implements IMessageHeader, Serializeable {
ID: number;
QR: 0 | 1;
OPCODE: number
AA: 0 | 1;
TC: 0 | 1;
RD: 0 | 1;
RA: 0 | 1;
Z: 0 | 1;
AD: 0 | 1;
CD: 0 | 1;
RCODE: ErrorCodes;
QDCOUNT: number;
ANCOUNT: number;
NSCOUNT: number;
ARCOUNT: number;
constructor(header: IMessageHeader) {
for (let k in header) {
this[k] = header[k];
}
}
lock() {
var f = 0x0000;
f = f | (this.QR << 15);
f = f | (this.OPCODE << 11);
f = f | (this.AA << 10);
f = f | (this.TC << 9);
f = f | (this.RD << 8);
f = f | (this.RA << 7);
f = f | (this.Z << 6);
f = f | (this.AD << 5);
f = f | (this.CD << 4);
f = f | this.RCODE;
let id = this.ID;
let qdc = this.QDCOUNT;
let anc = this.ANCOUNT;
let nsc = this.NSCOUNT;
let arc = this.ARCOUNT;
return {
length: 12,
serialize: (buffer: Buffer, offset: number) => {
buffer.writeUInt16BE(id, offset);
offset += 2;
buffer.writeUInt16BE(f, offset);
offset += 2;
buffer.writeUInt16BE(qdc, offset);
offset += 2;
buffer.writeUInt16BE(anc, offset);
offset += 2;
buffer.writeUInt16BE(nsc, offset);
offset += 2;
buffer.writeUInt16BE(arc, offset);
return offset + 2;
}
}
}
// serialize() {
// let data = Buffer.alloc(12);
// data.writeUInt16BE(this.ID, 0);
// data.writeUInt16BE(f, 2);
// data.writeUInt16BE(this.QDCOUNT, 4)
// data.writeUInt16BE(this.ANCOUNT, 6)
// data.writeUInt16BE(this.NSCOUNT, 8)
// data.writeUInt16BE(this.ARCOUNT, 10)
// return data;
// }
}

5
src/index.ts
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@ -1,4 +1,7 @@
import * as Types from "./types";
import * as Request from "./request"
export = Object.assign({}, Types, Request);
export = {
types: Types,
request: Request
}

60
src/label.ts Normal file
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@ -0,0 +1,60 @@
import { Serializeable } from "./serializeable";
const MAX_LABEL_SIZE = 63;
export class Label implements Serializeable {
constructor(public name?: string) { }
public lock() {
let parts = this.name.split(".");
let length = 0;
parts.forEach(e => {
if (e.length > MAX_LABEL_SIZE) throw new Error("Label to large");
length += e.length + 1;
})
length += 1;
return {
length: length,
serialize: (buffer: Buffer, offset: number) => {
parts.forEach(e => {
buffer.writeUInt8(e.length, offset)
offset++
buffer.write(e, offset, e.length)
offset += e.length
})
buffer.writeUInt8(0, offset);
offset += 1;
return offset;
}
}
}
// set name(name: string) {
// if (name != this._name) {
// let length = 0;
// let parts = name.split(".")
// parts.forEach(e => {
// if (e.length > MAX_LABEL_SIZE) throw new Error("Label to large");
// length += e.length + 1;
// })
// length += 1; //Adding last 0 length octet
// this._length = length;
// this._name_parts = parts;
// this._name = name;
// }
// }
// get name() {
// return this._name;
// }
// get length() {
// return this._length;
// }
// serialize(buffer: Buffer, offset: number) {
// }
}

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37
src/question.ts Normal file
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@ -0,0 +1,37 @@
import { IMessageQuestion } from "./types";
import { Label } from "./label";
import { Serializeable } from "./serializeable";
export class Question implements IMessageQuestion, Serializeable {
private _QNAME = new Label();
get QNAME() { return this._QNAME.name };
_QTYPE: number;
get QTYPE() { return this._QTYPE };
_QCLASS: number;
get QCLASS() { return this._QCLASS };
constructor(question: IMessageQuestion) {
this._QCLASS = question.QCLASS;
this._QTYPE = question.QTYPE;
this._QNAME.name = question.QNAME;
}
lock() {
let name = this._QNAME.lock();
let type = this._QTYPE;
let cl = this._QCLASS;
return {
length: name.length + 4,
serialize: (buffer: Buffer, offset: number) => {
offset = name.serialize(buffer, offset);
buffer.writeUInt16BE(type, offset);
offset += 2;
buffer.writeUInt16BE(cl, offset);
offset += 2;
return offset;
}
}
}
}

92
src/record.ts Normal file
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@ -0,0 +1,92 @@
import { Serializeable, Serializer } from "./serializeable";
import { MessageRecourceRecord } from "./types";
import { Label } from "./label";
export class RecourceRecord implements Partial<MessageRecourceRecord>, Serializeable {
/**
* This value can be set to identify if specific record is already set
*/
public Identifier: string;
private _NAME = new Label();
public get NAME() { return this._NAME.name };
public set NAME(name) { this._NAME.name = name };
private _TYPE: number;
public get TYPE() { return this._TYPE }
public set TYPE(value) {
if (value < 0 || value > 65535) throw new TypeError("TYPE Range: 0 - 65.535")
this._TYPE = value;
}
private _CLASS: number = 1;
public get CLASS() { return this._CLASS }
public set CLASS(value) {
if (value < 0 || value > 65535) throw new TypeError("CLASS Range: 0 - 65.535")
this._CLASS = value;
}
private _TTL: number;
public get TTL() { return this._TTL }
public set TTL(value) {
if (value < 0 || value > 4294967295) throw new TypeError("TTL Range: 0 - 4.294.967.295")
this._TTL = value;
}
constructor(data?: Partial<MessageRecourceRecord>) {
if (data) {
for (let key in data) {
this[key] = data[key];
}
}
}
protected dataLock?: () => Serializer;
public lock() {
if (!this.dataLock) return {
length: 0,
serialize: (buffer: Buffer, offset: number) => offset
}
let name = this._NAME.lock();
let type = this.TYPE;
let cl = this.CLASS;
let ttl = this.TTL;
let data = this.dataLock();
let length = name.length + 2 + 2 + 4 + 2 + data.length;
return {
length: length,
serialize: (buffer: Buffer, offset: number) => {
offset = name.serialize(buffer, offset);
buffer.writeUInt16BE(type, offset)
offset += 2
buffer.writeUInt16BE(cl, offset)
offset += 2
buffer.writeUInt32BE(ttl, offset)
offset += 4
buffer.writeUInt16BE(data.length, offset)
offset += 2
return data.serialize(buffer, offset);
}
}
}
}
export class RDATARecord extends RecourceRecord {
public RDATA: Buffer;
get RDLENGTH() {
return this.RDATA.length;
}
dataLock = () => {
return {
length: this.RDATA.length,
serialize: (buffer: Buffer, offset: number) => {
this.RDATA.copy(buffer, offset);
return offset + this.RDATA.length;
}
}
}
}

254
src/request.ts
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@ -1,7 +1,11 @@
import { Parser } from "binary-parser"
import { IMessage, IMessageHeader, IMessageQuestion, MessageRecourceRecord, ErrorCodes } from "./types"
import { IMessageHeader, IMessageQuestion, MessageRecourceRecord, ErrorCodes } from "./types"
import { Serializer } from "./serializeable";
import { Question } from "./question";
import { RecourceRecord } from "./record";
import { Header } from "./header";
const headerParser: Parser = new Parser()
export const headerParser: Parser = new Parser()
.endianess("big")
.uint16("ID")
.bit1("QR")
@ -19,15 +23,7 @@ const headerParser: Parser = new Parser()
.uint16("NSCOUNT")
.uint16("ARCOUNT")
export function parseHeader(data: Buffer): IMessageHeader {
try {
return <any>headerParser.parse(data);
} catch (e) {
throw new Error("Header parsing failed" + e.message)
}
}
const labelParser = new Parser()
export const labelParser = new Parser()
.endianess("big")
.uint8("dataLength")
.string("name", {
@ -35,7 +31,7 @@ const labelParser = new Parser()
encoding: "ascii"
})
const questionParser = new Parser()
export const questionParser = new Parser()
.endianess("big")
.array("QNAME", {
type: labelParser,
@ -50,47 +46,24 @@ const questionParser = new Parser()
.uint16("QTYPE")
.uint16("QCLASS")
export function parseQuestions(count: number, packet: Buffer): IMessageQuestion[] {
try {
return <any>new Parser()
.endianess("big")
.array("questions", {
type: questionParser,
length: count
}).parse(packet).questions;
} catch (e) {
throw new Error("Question parsing failed" + e.message)
}
}
const MAX_LABEL_SIZE = 63;
export function serializeName(name: string) {
let length = 0;
let parts = name.split(".");
parts.forEach(e => {
// Length of part and byte that holds the length information
if (e.length > MAX_LABEL_SIZE) throw new Error("Label to large");
length += e.length + 1;
const packetParser = new Parser()
.endianess("big")
.nest("header", { type: headerParser })
.array("questions", {
type: questionParser,
length: "header.QDCOUNT"
})
length += 1; //Adding last 0 length octet
let data = Buffer.alloc(length);
let offset = 0;
parts.forEach(e => {
data.writeUInt8(e.length, offset)
offset++
data.write(e, offset, e.length)
offset += e.length
})
data.writeUInt8(0, offset);
return data;
export function parseInput(data: Buffer): { header: IMessageHeader, questions: IMessageQuestion[] } {
let res = packetParser.parse(data);
return <any>res;
}
export class Request implements IMessage {
export class Request {
private _header: Header;
get header() {
return Object.assign({}, this._header);
return { ...this._header };
}
private _questions: Question[];
@ -98,21 +71,18 @@ export class Request implements IMessage {
return this._questions.map(e => Object.assign({}, e));
}
answers: RecourceRecord[] = [];
authorities: RecourceRecord[] = [];
additionals: RecourceRecord[] = [];
public _answers: RecourceRecord[] = [];
public _authorities: RecourceRecord[] = [];
public _additionals: RecourceRecord[] = [];
constructor(packet: Buffer, private sendCallback: (packet: Buffer) => any, private max_size = 512) {
let headerData = Buffer.alloc(12);
packet.copy(headerData, 0, 0, 12);
let bodyData = Buffer.alloc(packet.length - 12);
packet.copy(bodyData, 0, 12, packet.length);
constructor(packet: Buffer, public sender: string, private max_size = 0) {
let parsed = parseInput(packet);
this._header = new Header(parseHeader(headerData));
this._header = new Header(parsed.header);
this._header.AD = 0;
this._header.RCODE = ErrorCodes.NoError;
this._header.RA = this._header.RD;
this._questions = parseQuestions(this._header.QDCOUNT, bodyData).map(e => new Question(e));
this._questions = parsed.questions.map(e => new Question(e));
}
error(error: ErrorCodes) {
@ -124,42 +94,39 @@ export class Request implements IMessage {
this._header.RA = 0;
}
send() {
this.sendCallback(this.serialize());
}
serialize() {
this._header.AA = 1;
this._header.ANCOUNT = this.answers.length;
this._header.ARCOUNT = this.additionals.length;
this._header.NSCOUNT = this.authorities.length;
this._header.ANCOUNT = this._answers.length;
this._header.ARCOUNT = this._additionals.length;
this._header.NSCOUNT = this._authorities.length;
this._header.QR = 1;
let questions = this._questions.map(e => e.serialize())
let answers = this.answers.map(e => e.serialize())
let authority = this.authorities.map(e => e.serialize())
let additional = this.additionals.map(e => e.serialize())
let length = 12;
let header = this._header.lock();
let questions = this._questions.map(e => e.lock())
let answers = this._answers.map(e => e.lock())
let authority = this._authorities.map(e => e.lock())
let additional = this._additionals.map(e => e.lock())
let length = header.length;
questions.forEach(e => length += e.length);
answers.forEach(e => length += e.length)
authority.forEach(e => length += e.length)
additional.forEach(e => length += e.length)
if (length > this.max_size) {
if (this.max_size && length > this.max_size) {
this._header.TC = 1;
//Will ignore data, that exceeds length
length = this.max_size;
}
let header = this._header.serialize();
let data = Buffer.alloc(length)
let offset = 0;
let append = (buffer: Buffer) => {
let append = (ser: Serializer) => {
if (offset <= length) {
buffer.copy(data, offset, 0, buffer.length)
offset += buffer.length;
offset = ser.serialize(data, offset);
}
}
append(header)
@ -170,144 +137,3 @@ export class Request implements IMessage {
return data;
}
}
export class Header implements IMessageHeader {
ID: number;
QR: 0 | 1;
OPCODE: number
AA: 0 | 1;
TC: 0 | 1;
RD: 0 | 1;
RA: 0 | 1;
Z: 0 | 1;
AD: 0 | 1;
CD: 0 | 1;
RCODE: ErrorCodes;
QDCOUNT: number;
ANCOUNT: number;
NSCOUNT: number;
ARCOUNT: number;
constructor(header: IMessageHeader) {
for (let k in header) {
this[k] = header[k];
}
}
serialize() {
let data = Buffer.alloc(12);
data.writeUInt16BE(this.ID, 0);
var f = 0x0000;
f = f | (this.QR << 15);
f = f | (this.OPCODE << 11);
f = f | (this.AA << 10);
f = f | (this.TC << 9);
f = f | (this.RD << 8);
f = f | (this.RA << 7);
f = f | (this.Z << 6);
f = f | (this.AD << 5);
f = f | (this.CD << 4);
f = f | this.RCODE;
data.writeUInt16BE(f, 2);
data.writeUInt16BE(this.QDCOUNT, 4)
data.writeUInt16BE(this.ANCOUNT, 6)
data.writeUInt16BE(this.NSCOUNT, 8)
data.writeUInt16BE(this.ARCOUNT, 10)
return data;
}
}
export class Question implements IMessageQuestion {
QNAME: string;
QTYPE: number;
QCLASS: number;
constructor(question: IMessageQuestion) {
for (let k in question) {
this[k] = question[k]
}
}
serialize() {
let qname = serializeName(this.QNAME);
let data = Buffer.alloc(qname.length + 4);
qname.copy(data, 0, 0, qname.length);
let offset = qname.length;
data.writeUInt16BE(this.QTYPE, offset);
offset += 2;
data.writeUInt16BE(this.QCLASS, offset);
return data;
}
}
export class RecourceRecord implements MessageRecourceRecord {
constructor(data?: Partial<MessageRecourceRecord>) {
if (data) {
for (let key in data) {
this[key] = data[key];
}
}
}
/**
* This value can be set to identify if specific record is already set
*/
Identifier: string;
NAME: string
private _TYPE: number;
set TYPE(value) {
if (value < 0 || value > 65535) throw new TypeError("TYPE Range: 0 - 65.535")
this._TYPE = value;
}
get TYPE() {
return this._TYPE;
}
private _CLASS: number;
set CLASS(value) {
if (value < 0 || value > 65535) throw new TypeError("CLASS Range: 0 - 65.535")
this._CLASS = value;
}
get CLASS() {
return this._CLASS;
}
private _TTL: number;
set TTL(value) {
if (value < 0 || value > 4294967295) throw new TypeError("TTL Range: 0 - 4.294.967.295")
this._TTL = value;
}
get TTL() {
return this._TTL;
}
RDATA: Buffer;
get RDLENGTH() {
return this.RDATA.length;
}
public serialize() {
// TODO: Implement compression
let name = serializeName(this.NAME);
let rdata = this.RDATA;
let data = Buffer.alloc(name.length + 10 + rdata.length) // For TYPE, CLASS, TTL, RLENGTH
name.copy(data, 0, 0, name.length);
let offset = name.length;
data.writeUInt16BE(this.TYPE, offset)
offset += 2
data.writeUInt16BE(this.CLASS, offset)
offset += 2
data.writeUInt32BE(this._TTL, offset)
offset += 4
data.writeUInt16BE(rdata.length, offset)
offset += 2
rdata.copy(data, offset, 0, rdata.length)
return data;
}
}

19
src/serializeable.ts Normal file
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@ -0,0 +1,19 @@
export interface Serializer {
/**
*
* @param buffer Buffer to write to (should be capable to hold this.length)
* @param offset The offset at wich to start writing
* @returns The new offset (should be equal to original offset + this.length)
*/
serialize(buffer: Buffer, offset: number): number;
/**
* Returns length of serialized data
* @readonly
*/
length: number;
}
export interface Serializeable {
lock(): Serializer;
}

129
src/test.ts
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@ -1,7 +1,10 @@
import { assert, expect } from "chai";
import { assert } from "chai";
import { parseHeader, Header, parseQuestions, Question, RecourceRecord, Request } from "./request"
import { IMessageHeader, IMessageQuestion, QueryTypes } from "./types";
import { parseInput, Request, questionParser, headerParser } from "./request"
import { IMessageHeader, RecordTypes } from "./types";
import { RDATARecord } from "./record";
import { Question } from "./question";
import { Header } from "./header";
function fromHex(data: string) {
return Buffer.from(data.replace(/\s/g, ""), "hex");
@ -11,21 +14,7 @@ describe("parser", function () {
describe("header", function () {
describe("header parser", function () {
let should_templ: IMessageHeader = {
ID: 0,
QR: 0,
OPCODE: 0,
AA: 0,
TC: 0,
RD: 0,
RA: 0,
Z: 0,
AD: 0,
CD: 0,
RCODE: 0,
QDCOUNT: 0,
ANCOUNT: 0,
ARCOUNT: 0,
NSCOUNT: 0
ID: 0, QR: 0, OPCODE: 0, AA: 0, TC: 0, RD: 0, RA: 0, Z: 0, AD: 0, CD: 0, RCODE: 0, QDCOUNT: 0, ANCOUNT: 0, ARCOUNT: 0, NSCOUNT: 0
}
let tests: { name: string, data: string, fields: Partial<IMessageHeader> }[] = [
@ -124,29 +113,15 @@ describe("parser", function () {
name: "Testing all Flags and Values max",
data: "FFFF FFFF FFFF FFFF FFFF FFFF",
fields: {
ID: 65535,
QR: 1,
OPCODE: 15,
AA: 1,
TC: 1,
RD: 1,
RA: 1,
Z: 1,
AD: 1,
CD: 1,
RCODE: 15,
QDCOUNT: 65535,
ANCOUNT: 65535,
NSCOUNT: 65535,
ARCOUNT: 65535
ID: 65535, QR: 1, OPCODE: 15, AA: 1, TC: 1, RD: 1, RA: 1, Z: 1, AD: 1, CD: 1, RCODE: 15, QDCOUNT: 65535, ANCOUNT: 65535, NSCOUNT: 65535, ARCOUNT: 65535
}
}
]
tests.forEach(function (e) {
it(e.name, function () {
let testdata = fromHex(e.data)
let should: IMessageHeader = Object.assign({}, should_templ, e.fields) // Build in "clone" function
let header = parseHeader(testdata);
let should: IMessageHeader = { ...should_templ, ...e.fields }
let header = <any>headerParser.parse(testdata);
assert.hasAllKeys(header, Object.keys(should), "Parsed header is missing some fields")
assert.deepEqual(header, should, "Parsed header has not expected values!")
})
@ -155,21 +130,7 @@ describe("parser", function () {
describe("header serializer", function () {
let empty_header: IMessageHeader = {
ID: 0,
QR: 0,
OPCODE: 0,
AA: 0,
TC: 0,
RD: 0,
RA: 0,
Z: 0,
AD: 0,
CD: 0,
RCODE: 0,
QDCOUNT: 0,
ANCOUNT: 0,
ARCOUNT: 0,
NSCOUNT: 0
ID: 0, QR: 0, OPCODE: 0, AA: 0, TC: 0, RD: 0, RA: 0, Z: 0, AD: 0, CD: 0, RCODE: 0, QDCOUNT: 0, ANCOUNT: 0, ARCOUNT: 0, NSCOUNT: 0
}
let tests: { name: string, result: string, values: Partial<IMessageHeader> }[] = [
{
@ -287,8 +248,11 @@ describe("parser", function () {
tests.forEach(function (e) {
it(e.name, function () {
let header = Object.assign({}, empty_header, e.values)
let serialized = new Header(header).serialize();
assert.equal(serialized.toString("hex"), e.result.replace(/\s/g, "").toLowerCase(), "Header serialization failed");
let slz = new Header(header).lock();
assert.equal(slz.length, 12, "Header returns wrong length");
let res = Buffer.alloc(slz.length);
assert.equal(slz.serialize(res, 0), 12, "Header returns wrong offset");
assert.equal(res.toString("hex"), e.result.replace(/\s/g, "").toLowerCase(), "Header serialization failed");
})
})
})
@ -298,75 +262,78 @@ describe("parser", function () {
let questionData = fromHex("0474 6573 7407 6578 616d 706c 6503 636f 6d00 0001 0001")
let questionObj = {
QNAME: "test.example.com",
QTYPE: QueryTypes.A,
QTYPE: RecordTypes.A,
QCLASS: 1
}
it("check question parser with one question", function () {
let res = parseQuestions(1, questionData)
let should: IMessageQuestion[] = [questionObj]
let res = questionParser.parse(questionData)
assert.deepEqual(res, should, "Question parser does not parse input correctly")
assert.deepEqual(res, questionObj, "Question parser does not parse input correctly")
})
it("check question serialization", function () {
let res = new Question(questionObj).serialize()
let slz = new Question(questionObj).lock()
assert.equal(slz.length, 22, "Question serializer returns wrong length")
let res = Buffer.alloc(slz.length);
assert.equal(slz.serialize(res, 0), 22, "Question serializer returns wrong offset")
assert.equal(res.toString("hex"), questionData.toString("hex"), "Query serializer does not serialite correctly");
})
})
it("parse valid request", () => {
let should = {
header: { ID: 59445, QR: 0, OPCODE: 0, AA: 0, TC: 0, RD: 1, RA: 0, Z: 0, AD: 0, CD: 0, RCODE: 0, QDCOUNT: 1, ANCOUNT: 0, NSCOUNT: 0, ARCOUNT: 0 },
questions: [{ QNAME: 'example.com', QTYPE: 1, QCLASS: 1 }]
}
let data = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
let res = parseInput(data);
assert.deepEqual(res, should);
})
it("recource record serialization", function () {
let should = "07 6578616D706C65 03 636f6D 00 0001 0001 00000640 0004 0A000001"
let rr = new RecourceRecord()
let rr = new RDATARecord()
rr.CLASS = 1
rr.NAME = "example.com"
rr.TTL = 1600
rr.TYPE = 1
rr.RDATA = fromHex("0A 00 00 01")
let res = rr.serialize().toString("hex")
assert.equal(res, should.replace(/\s/g, "").toLowerCase(), "Serialization not working properly")
let srl = rr.lock();
let res = Buffer.alloc(srl.length);
srl.serialize(res, 0);
assert.equal(res.toString("hex"), should.replace(/\s/g, "").toLowerCase(), "Serialization not working properly")
})
it("recource record constructor value assign", function () {
let should = "07 6578616D706C65 03 636f6D 00 0001 0001 00000640 0004 0A000001"
let rr = new RecourceRecord({
let rr = new RDATARecord({
CLASS: 1,
NAME: "example.com",
TTL: 1600,
TYPE: 1,
RDATA: fromHex("0A 00 00 01")
})
let res = rr.serialize().toString("hex")
assert.equal(res, should.replace(/\s/g, "").toLowerCase(), "Serialization not working properly")
let srl = rr.lock();
assert.equal(srl.length, 27, "Record serializer returns wrong length")
let res = Buffer.alloc(srl.length);
assert.equal(srl.serialize(res, 0), 27, "Record serializer returns wrong offset")
assert.equal(res.toString("hex"), should.replace(/\s/g, "").toLowerCase(), "Record serialization not working properly")
})
it("full response serialization", function () {
let reqData = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
let should = "E835 8580 0001000100000000 076578616D706C6503636F6D0000010001 07 6578616D706C65 03 636F6D 00 0001 0001 0000 0640 0004 0A000001"
let request = new Request(reqData, () => null)
let rr = new RecourceRecord()
let request = new Request(reqData, "")
let rr = new RDATARecord()
rr.CLASS = 1
rr.NAME = "example.com"
rr.TTL = 1600
rr.TYPE = 1
rr.RDATA = fromHex("0A 00 00 01")
request.answers.push(rr)
request._answers.push(rr)
let data = request.serialize()
assert.equal(data.toString("hex"), should.replace(/\s/g, "").toLowerCase(), "Whole packet serialization failed")
})
// it("full response serialization benchmark", function () {
// let reqData = fromHex("E835 0100 0001 0000 0000 0000 07 6578616D706c65 03636F6D 00 0001 0001");
// for (let i = 0; i < 100; i++) {
// let request = new Request(reqData, () => null)
// let rr = new RecourceRecord()
// rr.CLASS = 1
// rr.NAME = "example.com"
// rr.TTL = 1600
// rr.TYPE = 1
// rr.RDATA = fromHex("0A 00 00 01")
// request.answers.push(rr)
// request.serialize()
// }
// })
})

23
src/types.ts
View File

@ -30,7 +30,7 @@ export enum ErrorCodes {
Refused
}
export enum QueryTypes {
export enum RecordTypes {
/**
* IPv4 address
*/
@ -254,14 +254,13 @@ export interface IMessageQuestion {
/**
* Two octed code that specifies the class of the Query
* IS for internet
* WARNING: ONLY IN IS SUPPORTED BY THIS APPLICATION
* IN for internet
*/
QCLASS: number;
}
export interface MessageRecourceRecord {
/**
* Domain name to wich resource record pertains
* Domain name to wich resource record points
*/
NAME: string;
@ -297,7 +296,7 @@ export interface MessageRecourceRecord {
RDLENGTH: number;
/**
* a variable length string of ectets taht describes
* a variable length string of octets that describes
* the resource. The format is defined by TYPE and CLASS
* field.
*
@ -306,10 +305,10 @@ export interface MessageRecourceRecord {
*/
RDATA: Buffer;
}
export interface IMessage {
header: IMessageHeader;
questions: IMessageQuestion[];
answers: MessageRecourceRecord[];
authorities: MessageRecourceRecord[];
additionals: MessageRecourceRecord[];
}
// export interface IMessage {
// header: IMessageHeader;
// questions: IMessageQuestion[];
// _answers: MessageRecourceRecord[];
// _authorities: MessageRecourceRecord[];
// _additionals: MessageRecourceRecord[];
// }

1661
yarn.lock
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