eviltik

export const Crosshair = ({position}) => {

  // adapted from https://codepen.io/driezis/pen/jOPzjLG

  const vertexShader = `
  uniform float rotation;
  uniform vec2 center;
  #include <common>
  varying vec2 vUv;
  void main() {

eviltik

const util = require('util');
const EventEmitter = require('events').EventEmitter;

function Fn(opts) {

    function start() {
        this.emit('start', opts);
    }

    // export public functions

eviltik

var net = require('net');

// creates the server
var server = net.createServer();

//emitted when server closes ...not emitted until all connections closes.
server.on('close',function(){
  console.log('Server closed !');
});

eviltik

const cidrClean = require('cidr-clean');

let list = [
	'1.0.0.0/8',
	'100.1.1.12/31',
	'100.1.1.2/31',
	'100.1.1.4/30',
	'100.1.1.8/30',
	'100.10.1.44/30',
	'100.10.1.54/31',

eviltik

/*

tcpdump -i lo -n ip

nmap   :19:54:07.502287 IP 127.0.0.1.56239 > 127.0.0.1.23: Flags [S], seq 411956820, win 1024, options [mss 1460], length 0
syn.js :21:26:57.830349 IP 127.0.0.1.54444 > 127.0.0.1.23: Flags [S], seq 234156285, win 1024, options [mss 1460], length 0

--> sound good but no ack+syn in reply, let's go verbose mode with tcpdump

eviltik

/*

tcpdump -v -n -i lo -x

NMAP result (nmap -sS 127.0.0.1 -p 23)
root@debian:/home/zenetik# tcpdump -vvv -i lo -n ip
tcpdump: listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
21:50:20.794277 IP (tos 0x0, ttl 40, id 56063, offset 0, flags [none], proto TCP (6), length 44)
    127.0.0.1.56649 > 127.0.0.1.23: Flags [S], cksum 0x17c8 (correct), seq 1809790236, win 1024, options [mss 1460], length 0
21:50:20.794292 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto TCP (6), length 44)

eviltik

var socket = raw.createSocket({
    protocol: raw.Protocol.TCP
});

/*
 * calling new raw.packet will compute automagicaly ip header, pseudo header and tcp header,
 * based on tcp headers and ip headers options passed in args
 *

eviltik

/*

tcpdump -vvv -i lo -n ip

NMAP result (nmap -sS localhost -p 23)
root@debian:/home/zenetik# tcpdump -vvv -i lo -n ip
tcpdump: listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
21:50:20.794277 IP (tos 0x0, ttl 40, id 56063, offset 0, flags [none], proto TCP (6), length 44)
    127.0.0.1.56649 > 127.0.0.1.23: Flags [S], cksum 0x17c8 (correct), seq 1809790236, win 1024, options [mss 1460], length 0

eviltik

/*

IP Header

0                   1                   2                   3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Version|  IHL  |Type of Service|          Total Length         |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

eviltik

    0x00,0x00, // src port
    0x00,0x00, // dst port
    0xa4,0x72,0xf0,0x7d,
    0x00,
    0x06, // protocol
    0x00, // checksum
    0x00,0x70,0x02,0xff,0xff,
    0xd6,0x79,0x00,0x00,0x02,
    0x04, // syn flag???
    0x05,0xa0,