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#!/usr/bin/env python3
# Tcp Port Forwarding (Reverse Proxy)
# Author : WangYihang <wangyihanger@gmail.com>

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

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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 && \

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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

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

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/*
 *  IP checksumming functions.
 *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
 *
 *  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

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/**
 * 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
 *

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# 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

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#!/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

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diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 64713ff..e51b080 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -476,6 +476,68 @@ static ssize_t channel_vp_mapping_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(channel_vp_mapping);
 
+static ssize_t channel_rb_show(struct device *dev,
+				       struct device_attribute *dev_attr,

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--- a/drivers/net/hyperv/netvsc.c	2018-06-21 06:21:38.510273512 +0000
+++ b/drivers/net/hyperv/netvsc.c	2018-06-21 06:33:29.991826355 +0000
@@ -1251,9 +1251,10 @@
 	if (send_recv_completions(ndev, net_device, nvchan) == 0 &&
 	    work_done < budget &&
 	    netvsc_napi_complete_done(napi, work_done) &&
-	    hv_end_read(&channel->inbound)) {
+	    hv_end_read(&channel->inbound) &&
+	    napi_schedule_prep(napi)) {
 		hv_begin_read(&channel->inbound);