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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.

『キューネン数学基礎論講義』の置換公理のページの内容について質問があります。「万有集合をもつモデルは基礎の公理 (A2) をみたさない」というのは本当でしょうか?

$A$の$0$を除くすべての要素は$0$を要素に持つので、

$x=0$の場合:$∃y∈A(y∈_\mathfrak{A}x)$が成り立たないのでよい。
$x≠0$の場合:$y$として$0$を取れば$0∈_\mathfrak{A}x∧¬∃z∈A(z∈_\mathfrak{A}x∧z∈_\mathfrak{A}0)$が成り立つのでよい。

となって、A2が$\mathfrak{A}$で成り立っているように見えます。内包公理があると万有集合から自分自身のみを要素に持つ集合が作れてしまうのでだめですが、内包公理がないので問題ないはずです。

Complete Recent Discord Quest

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This no longer works if you're alone in vc! Somebody else has to join you!

How to use this script:

Accept the quest under User Settings -> Gift Inventory

	create function [dbo].[ToUTF8](@s nvarchar(max))
	returns varbinary(max)
	as
	begin
	declare @i int = 1, @n int = datalength(@s)/2, @r varbinary(max) = 0x, @c int, @c2 int, @d varbinary(4)
	while @i <= @n
	begin
	set @c = unicode(substring(@s, @i, 1))
	if (@c & 0xFC00) = 0xD800
	begin

	#!/usr/bin/python
	import serial
	import sys

	latestByte = ('c')
	lastByte = ('c')
	inPacket = False
	myPacket = []
	PLENGTH = 0

	From 7341a316c38a61cc745ce04e618916677007883b Mon Sep 17 00:00:00 2001
	From: Timothy Brom <thb@timbrom.com>
	Date: Wed, 29 Feb 2012 11:29:55 -0500
	Subject: [PATCH] Fixed error about strexh and strexb using the same register

	---
	example/libs_stm/inc/core_support/core_cm3.c \| 4 ++--
	1 files changed, 2 insertions(+), 2 deletions(-)

	diff --git a/example/libs_stm/inc/core_support/core_cm3.c b/example/libs_stm/inc/core_support/core_cm3.c

	apiVersion: v1
	kind: ConfigMap
	metadata:
	name: imagecleanupconfig
	namespace: default
	labels:
	component: imagecleanup
	data:
	# removes all images unused by a running container
	cronjobs: 0 0 * * * crictl rmi --prune 2>&1

	deb http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse
	deb-src http://ports.ubuntu.com/ubuntu-ports jammy main restricted universe multiverse

	deb http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse
	deb-src http://ports.ubuntu.com/ubuntu-ports jammy-updates main restricted universe multiverse

	deb http://ports.ubuntu.com/ubuntu-ports jammy-backports main restricted universe multiverse
	deb-src http://ports.ubuntu.com/ubuntu-ports jammy-backports main restricted universe multiverse

	deb http://ports.ubuntu.com/ubuntu-ports jammy-security main restricted universe multiverse

	#!/usr/bin/env python
	import json
	import copy
	import sys
	import argparse
	from datetime import datetime, timedelta
	from subprocess import Popen, PIPE


	# dictionary of partiton names to variable generating functions

	int main()
	{
	printf("Hello world");
	return 0
	}