xh4n3’s gists

xh4n3 / arp_announcement.bt

Created July 7, 2022 02:39

traces the ARP requests in containernetworking/plugins issue#756

	#!/usr/bin/env bpftrace
	/*
	* arp_announcement traces inetdev_event/br_handle_frame/br_set_state.
	*
	* Background:
	* 1. This script addresses https://github.com/containernetworking/plugins/issues/756
	* 2. br state definitions at https://github.com/torvalds/linux/blob/v4.19/include/uapi/linux/if_bridge.h#L49-L53
	* 3. inetdev_event event type definitions at https://github.com/torvalds/linux/blob/v4.19/include/linux/netdevice.h#L2413-L2450
	*
	* Usage:

xh4n3 / trace_dns_drops.bt

Created November 1, 2021 08:41

trace_dns_drops traces DNS drops by ip_vs_in and ipt_do_table.

	#!/usr/bin/env bpftrace
	/*
	* trace_dns_drops traces DNS drops by ip_vs_in and ipt_do_table.
	*
	* Background:
	* 1. Before 5.9, ip_vs_in can cause UDP packets drops when IPVS RS deleted
	* and source port reused, See https://github.com/kubernetes/kubernetes/issues/71514 for more details.
	* 2. Misconfiguration of iptables can cause DNS drops.
	*
	* Usage:

xh4n3 / checkPorts.sh

Created September 23, 2016 08:42

check ports opened in docker container of Host mode

	#!/bin/sh
	# Port Exporter
	#
	# Description:
	# When docker containers are running in Host mode, thus /proc/[int]/net are shared across all containers.
	# This script mimicks the "netstat -nlp".
	# Firstly it finds all fds in current container into $FDS, then traverses /proc/[int]/net/tcp and /proc/[int]/net/tcp6 to collect fds. If any fd is in $FDS, the port is presumed to be opened in current container.
	#

	# if SKIP_PORT_CHECK is set, skip port check

xh4n3 / bash-cheatsheet.sh

Created September 22, 2016 09:09 — forked from LeCoupa/bash-cheatsheet.sh

Bash CheatSheet for UNIX Systems

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04

xh4n3 / etcd.go

Last active June 7, 2016 14:33

Client Set returns ErrClusterUnavailable but succeed

	package main

	import (
	"github.com/coreos/etcd/client"
	"golang.org/x/net/context"
	"log"
	"time"
	)

	var (

xh4n3 / index.html

Created April 8, 2016 10:10 — forked from anonymous/index.html

JS Bin // source https://jsbin.com/wowena

	<!DOCTYPE html>
	<html>

	<head>
	<script src="https://fb.me/react-with-addons-0.14.7.min.js"></script>
	<script src="https://fb.me/react-dom-0.14.7.min.js"></script>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	<script src="https://npmcdn.com/redux@latest/dist/redux.min.js"></script>

xh4n3 / get-watchers.js

Created March 3, 2016 09:05 — forked from kentcdodds/get-watchers.js

Get Watchers of element and its children

	function getWatchers(root) {
	root = angular.element(root \|\| document.documentElement);
	var watcherCount = 0;

	function getElemWatchers(element) {
	var isolateWatchers = getWatchersFromScope(element.data().$isolateScope);
	var scopeWatchers = getWatchersFromScope(element.data().$scope);
	var watchers = scopeWatchers.concat(isolateWatchers);
	angular.forEach(element.children(), function (childElement) {
	watchers = watchers.concat(getElemWatchers(angular.element(childElement)));

xh4n3 / surge.conf

Created October 5, 2015 11:53 — forked from janlay/README.md

Yet another config for Surge.app

	# This config file was created for myself (@janlay). You may want to add or remove some rules to make efficient use of the Internet.

	[General]
	# warning, notify, info, verbose
	loglevel = notify
	# bypass HTTP persistent connections
	bypass = e.crashlytics.com

	[Proxy]
	# http, https, socks5

xh4n3 / Surge.md

Last active June 16, 2020 07:42

Surge

Feature

替代 PAC，实现根据规则区分选择代理线路
支持 SOCKS5 和 Shadowsocks 协议
完整支持所有的 Shadowsocks 加密方式（table, rc4-md5, salsa20, chacha20, aes-256-cfb, aes-192-cfb, aes-128-cfb, bf-cfb, cast5-cfb, des-cfb, rc2-cfb, rc4, seed-cfb）
全面支持双向 HTTP Keep-Alvie
快，各种黑科技加速
直接临时修改某个域名的访问规则（暂时仅 Mac 版本）
支持使用 GeoIP 规则决定线路