dcui / port-forwarding.py

Created February 28, 2023 20:52 — forked from WangYihang/port-forwarding.py

port forwarding via python socket

	#!/usr/bin/env python3
	# Tcp Port Forwarding (Reverse Proxy)
	# Author : WangYihang <[email protected]>

	'''
	+-----------------------------+ +---------------------------------------------+ +--------------------------------+
	\| My Laptop (Alice) \| \| Intermediary Server (Bob) \| \| Internal Server (Carol) \|
	+-----------------------------+ +----------------------+----------------------+ +--------------------------------+
	\| $ ssh -p 1022 [email protected] \|<------->\| IF 1: 1.2.3.4 \| IF 2: 192.168.1.1 \|<------->\| IF 1: 192.168.1.2 \|
	\| [email protected]'s password: \| +----------------------+----------------------+ +--------------------------------+

dcui / how-to-install-latest-gcc-on-ubuntu-lts.txt

Created September 1, 2021 00:12 — forked from application2000/how-to-install-latest-gcc-on-ubuntu-lts.txt

How to install latest gcc on Ubuntu LTS (12.04, 14.04, 16.04)

	These commands are based on a askubuntu answer http://askubuntu.com/a/581497
	To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
	USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
	ABSOLUTELY NO WARRANTY.

	If you are still reading let's carry on with the code.

	sudo apt-get update && \
	sudo apt-get install build-essential software-properties-common -y && \
	sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \

dcui / latency.txt

Created May 24, 2021 18:55 — forked from jboner/latency.txt

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

dcui / centos-install-kernel-debuginfo.sh

Created August 3, 2020 18:55 — forked from jarek-przygodzki/centos-install-kernel-debuginfo.sh

CentOS 7 - How to install kernel-debuginfo

yum --enablerepo=base-debuginfo install -y kernel-debuginfo-$(uname -r)

dcui / net-checksum.c

Created July 11, 2020 19:48 — forked from fxlv/net-checksum.c

	/*
	* IP checksumming functions.
	* (c) 2008 Gerd Hoffmann <[email protected]>
	*
	* 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; under version 2 of the License.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of

dcui / packet-generator.cpp

Created July 11, 2020 19:11 — forked from jonhoo/packet-generator.cpp

Complete example code showing how to construct a UDP packet from scratch and inject it on a WiFi interface in Linux

	/**
	* Hello, and welcome to this brief, but hopefully complete, example file for
	* wireless packet injection using pcap.
	*
	* Although there are various resources for this spread on the web, it is hard
	* to find a single, cohesive piece that shows how everything fits together.
	* This file aims to give such an example, constructing a fully valid UDP packet
	* all the way from the 802.11 PHY header (through radiotap) to the data part of
	* the packet and then injecting it on a wireless interface
	*

dcui / source.list

Created May 8, 2020 22:53 — forked from malikalichsan/sources.list

/etc/apt/source.list for ubuntu 19.10

	# deb cdrom:[Ubuntu 19.10 _Eoan Ermine_ - Release amd64 (20191017)]/ eoan main restricted

	# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
	# newer versions of the distribution.
	deb http://id.archive.ubuntu.com/ubuntu/ eoan main restricted
	# deb-src http://id.archive.ubuntu.com/ubuntu/ eoan main restricted

	## Major bug fix updates produced after the final release of the
	## distribution.
	deb http://id.archive.ubuntu.com/ubuntu/ eoan-updates main restricted

dcui / toeplitz_based_hash.py

Created May 9, 2019 17:37 — forked from joongh/toeplitz_based_hash.py

Python implementation of Toeplitz-based hash function. It is implemented to understand how the Toeplitz-based hash function works.

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

	# Test data including the secret key, ip, port numbers and the hash values
	# as the result is from "Intel Ethernet Controller 710 Series Datasheet".

	KEY=[]

	def reset_key():
	global KEY

dcui / memory_layout.md

Created May 10, 2017 12:11 — forked from CMCDragonkai/memory_layout.md

Linux: Understanding the Memory Layout of Linux Executables

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

dcui / sendRawEth.c

Created May 20, 2016 10:06 — forked from austinmarton/sendRawEth.c

Send a raw Ethernet frame in Linux

	/*
	* 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 3 of the License, or
	* (at your option) any later version.
	*/

	#include <arpa/inet.h>
	#include <linux/if_packet.h>
	#include <stdio.h>

Dexuan Cui dcui