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IPv6	国家	省份	城市	学校/教育机构
2001:da8:0200::/48	中国	北京	北京	清华大学
2001:da8:0201::/48	中国	北京	北京	北京大学
2001:da8:0202::/48	中国	北京	北京	北京邮电大学
2001:da8:0203::/48	中国	北京	北京	北京航空航天大学
2001:da8:0204::/48	中国	北京	北京	北京理工大学
2001:da8:0205::/48	中国	北京	北京	北京交通大学
2001:da8:0206::/48	中国	北京	北京	北京城市学院
2001:da8:0207::/48	中国	北京	北京	北京师范大学
2001:da8:0208::/48	中国	北京	北京	北京科技大学

Controlling the Brother P-Touch Cube label maker from a computer

The Brother PTP300BT label maker is intended to be controlled using the official Brother P-Touch Design & Print iOS/Android app. The app has arbitrary limits on what you can print (1 text object and up to 3 preset icons), so I thought it would be a fun challenge to reverse engineer the protocol to print whatever I wanted.

Python code at the bottom if you want to skip the fine details.

Process

Intitially I had a quick peek at the Android APK to see if there was any useful information inside. The code that handles the communication with the printer in Print&Design turned out to be a native library, but the app clearly prepares a bitmap image and passes it to this native library for printing. Bitmaps are definitely something we can work with.

glibc Versions

List of oldest supported version of top 10 Linux Distros and their glibc version according to distrowatch.com.

Summary

Out of all versions with published EOLs, 2.12 is the oldest glibc still active, found in CentOS 6.8.

If CentOS 6 and 7 are eliminated, the oldest glibc is 2.23 in Ubuntu and Slackware.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

朴素VPN：一个纯内核级静态隧道

由于路由管控系统的建立，实时动态黑洞路由已成为最有效的封锁手段，TCP连接重置和DNS污染成为次要手段，利用漏洞的穿墙方法已不再具有普遍意义。对此应对方法是多样化协议的VPN来抵抗识别。这里介绍一种太简单、有时很朴素的“穷人VPN”。

朴素VPN只需要一次内核配置（Linux内核），即可永久稳定运行，不需要任何用户态守护进程。所有流量转换和加密全部由内核完成，原生性能，开销几乎没有。静态配置，避免动态握手和参数协商产生指纹特征导致被识别。并且支持NAT，移动的内网用户可以使用此方法。支持广泛，基于L2TPv3标准，Linux内核3.2+都有支持，其他操作系统原则上也能支持。但有两个局限：需要root权限；一个隧道只支持一个用户。

朴素VPN利用UDP封装的静态L2TP隧道实现VPN，内核XFRM实现静态IPsec。实际上IP-in-IP隧道即可实现VPN，但是这种协议无法穿越NAT，因此必须利用UDP封装。内核3.18将支持Foo-over-UDP，在UDP里面直接封装IP，与静态的L2TP-over-UDP很类似。

创建一个朴素VPN

Files

The basic structure of a React+Flux application (see other examples)

 - /src/actions/AppActions.js     - Action creators (Flux)
 - /src/components/Application.js - The top-level React component
 - /src/constants/ActionTypes.js  - Action types (Flux)
 - /src/core/Dispatcher.js        - Dispatcher (Flux)
 - /src/stores/AppStore.js        - The main store (Flux)

	# Copyright 2016 The TensorFlow Authors. All Rights Reserved.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,

	<?xml version="1.0"?>
	<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
	<!-- /etc/fonts/conf.avail/51-noto-color-emoji.conf -->
	<fontconfig>
	<selectfont>
	<acceptfont>
	<pattern>
	<patelt name="family"><string>Noto Color Emoji</string></patelt>
	</pattern>
	</acceptfont>

	#!/usr/bin/env python
	# encoding: utf-8

	import asyncio
	import json
	from aiohttp import ClientSession
	from lxml import etree
	from argparse import ArgumentParser
	from os import mkdir, listdir
	from execjs import compile as compilejs

	From 966471712184cfb3b067f2ae8dad9d8e2a896cae Mon Sep 17 00:00:00 2001
	From: Bearice Ren <bearice@icybear.net>
	Date: Tue, 20 Sep 2016 11:52:08 +0800
	Subject: [PATCH] add filter-aaaa option

	---
	src/dnsmasq.h \| 3 ++-
	src/option.c \| 3 +++
	src/rfc1035.c \| 9 +++++++++
	3 files changed, 14 insertions(+), 1 deletion(-)