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--- ---
title: "dnstp: Transmitting Arbitrary Data With DNS" title: "dnstp: Transmitting Arbitrary Data With DNS"
date: 2024-10-12T08:26:40+00:00 date: 2024-10-12T08:26:40+00:00
tags:
- Rust
- Networking
categories:
- Dev
--- ---
![Build Binaries](https://github.com/Sarsoo/dnstp/actions/workflows/build.yml/badge.svg) ![Build Binaries](https://github.com/Sarsoo/dnstp/actions/workflows/build.yml/badge.svg)
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[![Rust](https://img.shields.io/badge/rust-%23000000.svg?style=for-the-badge&logo=rust&logoColor=white)](https://git.sarsoo.xyz/sarsoo/-/packages/cargo/dnstplib) [![Rust](https://img.shields.io/badge/rust-%23000000.svg?style=for-the-badge&logo=rust&logoColor=white)](https://git.sarsoo.xyz/sarsoo/-/packages/cargo/dnstplib)
[![Docker](https://img.shields.io/badge/docker-%230db7ed.svg?style=for-the-badge&logo=docker&logoColor=white)](https://git.sarsoo.xyz/sarsoo/-/packages/container/dnstp) [![Docker](https://img.shields.io/badge/docker-%230db7ed.svg?style=for-the-badge&logo=docker&logoColor=white)](https://git.sarsoo.xyz/sarsoo/-/packages/container/dnstp)
I have written previously about my Rust projects. However, these have always been in WebAssembly so they are consumed from a web browser. I wanted to play with native Rust code and some if its highly regarded multi-threading features. [I have written previously about my Rust projects](/tags/rust). However, these have always been in WebAssembly so they are consumed from a web browser. I wanted to play with native Rust code and some if its highly regarded multi-threading features.
Something I also enjoy, when working with low-level languages, is bitwise operations. These two led me to the desire to do a native Rust project. I was aware of the concept of [DNS tunneling](https://www.zenarmor.com/docs/network-security-tutorials/what-is-dns-tunneling#what-are-the-dns-tunneling-techniques), I believe I heard the idea described on [Security This Week with Carl Franklin](https://securitythisweek.com/). So that was the inspiration, build some sort of DNS tunneling apparatus, largely to have a toy project that I could fiddle with. Something I also enjoy, when working with low-level languages, is bitwise operations. These two led me to the desire to do a native Rust project. I was aware of the concept of [DNS tunneling](https://www.zenarmor.com/docs/network-security-tutorials/what-is-dns-tunneling#what-are-the-dns-tunneling-techniques), I believe I heard the idea described on [Security This Week with Carl Franklin](https://securitythisweek.com/). So that was the inspiration, build some sort of DNS tunneling apparatus, largely to have a toy project that I could fiddle with.
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## data transmission ## data transmission
With this security context set, we can now send data over the insecured channel. With this security context set, we can now send data over the insecured channel. The general idea is that the components of each data transfer are
# dnstplib # dns lib
The first task when I started the project was to work out how to generate and serialise DNS messages. I had a look for an existing crate that could help with this but wasn't satisfied with what I could find, so I decided to write my own. This was a lot of fun because, as I mentioned previously, I love working with bitwise operations. Working with the bit flags of the DNS header was great.
# mvp # mvp