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compare: hibas123:9d3d9f8a80ddd4fbaebf02b1c7a0848c68d73d69
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No commits in common. "23c27c3c4f017745df177af063981b9f07709fef" and "9d3d9f8a80ddd4fbaebf02b1c7a0848c68d73d69" have entirely different histories.
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7 changed files with 175 additions and 1 deletions
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7
lib/listener.d.ts vendored Normal file
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@ -0,0 +1,7 @@
import { Request } from "./request";
export default class Listener {
private udp;
private tcp;
constructor(type: "udp4" | "udp6" | "tcp", onRequest: (request: Request) => any, host?: string);
close(): void;
}

71
lib/listener.js Normal file
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@ -0,0 +1,71 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const net = require("net");
const dgram = require("dgram");
const request_1 = require("./request");
class Listener {
constructor(type, onRequest, host = "0.0.0.0") {
switch (type) {
case "udp6":
case "udp4":
this.udp = dgram.createSocket(type);
this.udp.on("listening", () => {
console.log(`UDP Server Listening on 53`);
});
this.udp.on("message", (message, remote) => {
let request = new request_1.Request(message, (data) => {
// console.log("sending:", new Request(data, (a) => 0));
this.udp.send(data, remote.port, remote.address);
});
onRequest(request);
});
this.udp.bind(53, host);
break;
case "tcp":
console.log("Using TCP is experimantal");
this.tcp = net.createServer((socket) => {
let length;
let got = 0;
let message = undefined;
socket.on("data", (data) => {
let offset = 0;
if (!message) {
length = data.readUInt16BE(0);
if (length > 4096)
return socket.destroy(); //Requests with more that 2k are ignored
message = Buffer.alloc(length);
offset = 2;
}
let read = (data.length - offset) > (length - got) ? (length - got) : (data.length - offset);
data.copy(message, got, offset, read + offset);
got += read;
//ToDo don't ignore probably following requests
if (got >= length) {
let request = new request_1.Request(message, (data) => {
socket.write(data);
});
got = 0;
message = undefined;
length = 0;
onRequest(request);
}
});
});
this.tcp.listen(53, host);
console.log(`TCP Server Listening on 53`);
break;
default:
throw new Error("Unknown socket type");
}
}
close() {
if (this.udp) {
this.udp.close();
}
else {
this.tcp.close();
}
}
}
exports.default = Listener;
//# sourceMappingURL=listener.js.map

1
lib/listener.js.map Normal file
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@ -0,0 +1 @@
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9
lib/request.js
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@ -134,6 +134,15 @@ class Request {
answers.forEach(e => length += e.length);
authority.forEach(e => length += e.length);
additional.forEach(e => length += e.length);
// let questionsByteLength = 0;
// questions.forEach(e => questionsByteLength += e.length);
// let answersByteLength = 0;
// answers.forEach(e => answersByteLength += e.length)
// let authorityByteLength = 0;
// authority.forEach(e => authorityByteLength += e.length)
// let additionalByteLength = 0;
// additional.forEach(e => additionalByteLength += e.length)
// let length = 12 + questionsByteLength + answersByteLength + authorityByteLength + additionalByteLength; //Header is always 12 byte large
if (length > this.max_size) {
this._header.TC = 1;
//Will ignore data, that exceeds length

2
lib/request.js.map
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File diff suppressed because one or more lines are too long

73
src/listener.ts Normal file
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@ -0,0 +1,73 @@
import * as net from "net"
import * as dgram from "dgram";
import { Request } from "./request";
import { PassThrough } from "stream";
export default class Listener {
private udp: dgram.Socket
private tcp: net.Server
constructor(type: "udp4" | "udp6" | "tcp", onRequest: (request: Request) => any, host: string = "0.0.0.0") {
switch (type) {
case "udp6":
case "udp4":
this.udp = dgram.createSocket(type)
this.udp.on("listening", () => {
console.log(`UDP Server Listening on 53`)
})
this.udp.on("message", (message, remote) => {
let request = new Request(message, (data) => {
// console.log("sending:", new Request(data, (a) => 0));
this.udp.send(data, remote.port, remote.address)
})
onRequest(request);
})
this.udp.bind(53, host)
break;
case "tcp":
console.log("Using TCP is experimantal")
this.tcp = net.createServer((socket) => {
let length: number;
let got: number = 0;
let message = undefined;
socket.on("data", (data) => {
let offset = 0;
if (!message) {
length = data.readUInt16BE(0);
if (length > 4096) return socket.destroy(); //Requests with more that 2k are ignored
message = Buffer.alloc(length);
offset = 2;
}
let read = (data.length - offset) > (length - got) ? (length - got) : (data.length - offset);
data.copy(message, got, offset, read + offset)
got += read;
//ToDo don't ignore probably following requests
if (got >= length) {
let request = new Request(message, (data) => {
socket.write(data);
})
got = 0;
message = undefined;
length = 0;
onRequest(request);
}
});
});
this.tcp.listen(53, host);
console.log(`TCP Server Listening on 53`)
break;
default:
throw new Error("Unknown socket type")
}
}
close() {
if (this.udp) {
this.udp.close();
} else {
this.tcp.close();
}
}
}

13
src/request.ts
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@ -144,6 +144,19 @@ export class Request implements IMessage {
answers.forEach(e => length += e.length)
authority.forEach(e => length += e.length)
additional.forEach(e => length += e.length)
// let questionsByteLength = 0;
// questions.forEach(e => questionsByteLength += e.length);
// let answersByteLength = 0;
// answers.forEach(e => answersByteLength += e.length)
// let authorityByteLength = 0;
// authority.forEach(e => authorityByteLength += e.length)
// let additionalByteLength = 0;
// additional.forEach(e => additionalByteLength += e.length)
// let length = 12 + questionsByteLength + answersByteLength + authorityByteLength + additionalByteLength; //Header is always 12 byte large
if (length > this.max_size) {
this._header.TC = 1;