Dns.cr

<div align = "center"><img src="images/icon.png" width="256" height="256" /></div> <div align = "center"> <h1>Dns.cr - Domain Name System Resolver</h1> </div> <p align="center"> <a href="https://crystal-lang.org"> <img src="https://img.shields.io/badge/built%20with-crystal-000000.svg" /></a> <a href="https://github.com/636f7374/dns.cr/actions"> <img src="https://github.com/636f7374/dns.cr/workflows/Continuous%20Integration/badge.svg" /></a> <a href="https://github.com/636f7374/dns.cr/releases"> <img src="https://img.shields.io/github/release/636f7374/dns.cr.svg" /></a> <a href="https://github.com/636f7374/dns.cr/blob/master/license"> <img src="https://img.shields.io/github/license/636f7374/dns.cr.svg"></a> </p>

Description

• High-performance, reliable, and stable DNS Resolver.
• This repository is under evaluation and will replace Durian.cr.

Features

• [X] Concurrent
• [X] Caching
• [X] UDP
• [X] DNS over T(CP/LS)
• [X] DNS over HTTP(S)

Usage

• Please check the examples folder.

Used as Shard

Add this to your application's shard.yml:

dependencies:
  dns:
    github: 636f7374/dns.cr

Installation

$ git clone https://github.com/636f7374/dns.cr.git

Development

$ make test

References

• StackOverflow | How to convert a string or integer to binary in Ruby?
• StackOverflow | Requesting A and AAAA records in single DNS query
• StackOverflow | Example of DNS Compression Pointer Offset > than 12 bytes
• StackOverflow | why libuv do DNS request by multiple thread
• Official | DNS_HEADER structure
• Official | The Saga of Concurrent DNS in Python, and the Defeat of the Wicked Mutex Troll
• Official | Help understanding DNS packet data
• Official | Ietf - RFC 1035
• Official | Docs.rs::hyper_trust_dns_connector
• Official | libuv provides asynchronous variants of getaddrinfo and getnameinfo
• Blogs | Adventures in Rust: Futures and Tokio
• Blogs | Cocoa: Asynchronous Host name lookups
• Blogs | Using DNS with Libevent: high and low-level functionality
• Blogs | The problem with libresolv
• Blogs | The problem with getaddrinfo
• Blogs | What does getaddrinfo do?
• Blogs | A warm welcome to DNS
• Document | DNS Query Message Format
• Docuemnt | Protocol and Format
• Document | Binary Numbers
• Document | DNS Message Header and Question Section Format
• Document | DNS Name Notation and Message Compression Technique
• Github Gist | DNS Query Code in C with linux sockets
• Github Gist | getaddrinfo.strace
• Source Code | posix/getaddrinfo.c
• Source Code | DNS header for C | 0x00sec
• ...

Related

• #8480 | blocking call in one fiber can cause IO timeouts in others
• #4816 | Add Resolv class to standard library
• #2660 | Fix/Implement own DNS resolver
• #4236 | Configurable DNS resolvers
• #2829 | DNS threaded resolver
• #2745 | Don't use libevent's getaddrinfo, use C's getaddrinfo
• #8376 | Some TCPSocket connections will cause HTTP::Server accept (freeze | blocking | hangs | waiting)?
• ...

Credit

• _Icon::Freepik/Travel

Contributors

|Name|Creator|Maintainer|Contributor| |:---:|:---:|:---:|:---:| |636f7374|√|√|√| |usiegj00|||√|

License

• BSD 3-Clause Clear License