MelvinTo

Source: https://web.archive.org/web/20141216073338/https://gkbrk.com/blog/read?name=reverse_engineering_the_speedtest_net_protocol Author: Gökberk Yaltıraklı

Reverse Engineering the Speedtest.net Protocol

After finishing my command line speed tester written in Rust, I didn't have a proper blog to document this process. A few days ago I wrapped up a simple blogging script in Python so hopefully it works good enough to explain how everything works.

By now I have already figured out the whole protocol for performing a speed test but I will write all the steps that I took so you can learn how to reverse engineer a simple protocol.

The code that I wrote can be found at https://github.com/gkbrk/speedtest-rust.

levelsio

// Modified from @mutsuda's https://medium.com/@mutsuda/create-an-ios-widget-showing-google-spreadsheets-data-856767a9447e
// by @levelsio

// HOW TO
// 1) Make a Google Sheet, we'll pull the first cell e.g. A1
// 2) Publish your Google Sheet, File -> Publish To Web
// 3) Copy the SHEET_ID in the URL, put it in here below:
const endpoint = "https://spreadsheets.google.com/feeds/cells/SHEET_ID/1/public/full?alt=json"
// 4) Install Scriptable @ https://apps.apple.com/us/app/scriptable/id1405459188
// 5) Copy this entire script in to Scriptable (tip: you can send it to your iPhone via Whatsapp/Messenger/Telegram etc)

MelvinTo

#!/bin/bash

echo "Warning: This script is only tested on ubuntu 18.04 LTS"

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null && pwd )"

# Require sudo privilege to setup and install packages

echo "Turning on BBR..."
sudo bash -c "modprobe tcp_bbr" &>/dev/null

bigtan

apt-get update && apt-get install build-essential automake autoconf libtool git clang -y && export CC=clang

ver=2.16.3
wget --no-check-certificate https://tls.mbed.org/download/mbedtls-$ver-gpl.tgz
tar zxf mbedtls-$ver-gpl.tgz
cd mbedtls-$ver
sed -i "s/DESTDIR=\/usr\/local/DESTDIR=\/projects\/dists\/mbedtls/g" Makefile
LDFLAGS=-static WINDOWS_BUILD=1 make -j`nproc` install
cd ..

mosquito

Docker compose as a systemd unit

Create file /etc/systemd/system/[email protected]. SystemD calling binaries using an absolute path. In my case is prefixed by /usr/local/bin, you should use paths specific for your environment.

[Unit]
Description=%i service with docker compose
PartOf=docker.service
After=docker.service

harv

#!/bin/sh

# cross & static compile shadowsocks-libev

PCRE_VER=8.41
PCRE_FILE="http://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-$PCRE_VER.tar.gz"

MBEDTLS_VER=2.6.0
MBEDTLS_FILE="https://tls.mbed.org/download/mbedtls-$MBEDTLS_VER-gpl.tgz"

halmartin

#!/usr/bin/env bash
# build kernel 4.9-rc8 with sun8i-emac for Allwinner H3
# Copyright (C) 2016 Hal Martin

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,

fntlnz

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

ygotthilf

ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub

antirez

#!/usr/bin/tclsh8.5
#
# Usage: git-unmerged branch1 branch2
# 
# Shows all the non-common commits in the two branches, where non-common
# commits means simply commits with a unique commit *message*.

proc getlog branch {
    lrange [split [exec git log $branch --oneline] "\n"] 0 400
}