https://github.com/davidyslu/packet_manipulation
Lab in NCTU course "Introduction to Computer Networks 2018"
https://github.com/davidyslu/packet_manipulation
packet-manipulation python scapy tcpdump wireshark
Last synced: 4 months ago
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Lab in NCTU course "Introduction to Computer Networks 2018"
- Host: GitHub
- URL: https://github.com/davidyslu/packet_manipulation
- Owner: davidyslu
- License: gpl-3.0
- Created: 2018-10-07T12:58:16.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2019-01-23T03:18:47.000Z (almost 7 years ago)
- Last Synced: 2025-02-07T16:12:13.333Z (11 months ago)
- Topics: packet-manipulation, python, scapy, tcpdump, wireshark
- Language: Shell
- Homepage:
- Size: 4.37 MB
- Stars: 4
- Watchers: 2
- Forks: 7
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Packet Manipulation via Scapy
This repository is a lab for NCTU course "Introduction to Computer Networks 2018".
---
## Abstract
In this lab we are going to learn how to use Scapy - a powerful interactive packet manipulation program, which can forge or decode packets of a wide number of protocols, send them on wire, capture them, match requests and replies, and much more.
---
## Objectives
1. Learn how to define your own protocol and generate a packet payload
2. Learn how to use Wireshark to filter packets and find your wanted information
This lab aims to learn how we use Scapy and Python to program a simple network protocol and observe the behavior of packet sending and receiving via Wireshark.
* Basic knowledge of Docker
* Linux networking
* Python with Scapy
* Wireshark
---
## Overview
* Define our own proprietary protocol
* In this protocol, we will iteratively send to a server
1. ID packet: your (ID + department + gender)
2. Secret packet: a digit of the secret key
* The above procedure will repeat 14 times so that you will collect a 14-digit secret key
* E.g., 41228904512480
### Packet Format
* ID Packet
* Secret Packet
---
## Installation
* **Docker (Docker CE)**
* [Windows](https://docs.docker.com/docker-for-windows/)
* [MacOS](https://docs.docker.com/docker-for-mac/)
* [Ubuntu Linux](https://docs.docker.com/install/linux/docker-ce/ubuntu/)
* [Others](https://docs.docker.com/install/)
* **[Wireshark 2.6.3](https://www.wireshark.org/download.html)**
* Windows ([32-bit](https://1.as.dl.wireshark.org/win32/Wireshark-win32-2.6.3.exe) / [64-bit](https://1.as.dl.wireshark.org/win64/Wireshark-win64-2.6.3.exe))
* [MacOS](https://1.as.dl.wireshark.org/osx/Wireshark%202.6.3%20Intel%2064.dmg)
* Ubuntu Linux
```bash
$ sudo apt-get install -y wireshark
```
* Others
* [PieTTy](https://drive.google.com/file/d/0BxKoW6fgUa0CSTJDMmlDNC1nUDg/view) (for Windows)
---
## Tasks
> **NOTICE:** Please follow this [slides](Tasks.pdf) for detail.
* **In lab assignement**
1. Environment Setup
2. Define protocol via Scapy
3. Send packets
4. Sniff packets
5. Run sender and receiver
6. Push your files to remote
* **Homework assignement**
1. Load PCAP via Wireshark
2. Filter the target packet
3. Decode the secret key
4. Report
### File Structure
```bash
Packet Manipulation/ # This is ./ in this repository
|--- docker/ # Docker configuration
|--- Dockerfile
|--- main.sh # Scripts for running Docker
|--- [Other files...]
|--- src/ # Source code
|--- data/ # Input files
|--- record.txt # Example file for R/W
|--- out/ # Output files
|--- scripts/ # Networks configuration
|--- main.sh # Scripts for build namespace
|--- [Other files...]
|--- sender.py # Send packets
|--- receiver.py # Receive and sniff packets
|--- Protocol.py # Define your own protocol
|--- decoder.py # Decode the output file
|--- LICENSE
|--- README.md
```
---
## Contributor
* [David Lu](https://github.com/yungshenglu)
---
## License
[GNU GENERAL PUBLIC LICENSE Version 3](LICENSE)