Files
hickory-dns/crates/async-std-resolver/README.md
Benjamin Fry 408d0baca0 Prepare 0.24 release with branding change to Hickory DNS (#2054)
* update all READMEs with notices about the name change

* update changelog for 0.24

* bump crate versions to 0.24

* update version notice information

* update readmes to back reference trust-dns

* rename all crates to hickory counterparts

* replace all Trust-DNS references in code and comments with Hickory DNS

* rename all Trust-DNS references to Hickory DNS in non-code

* rename all trust-dns-resolver references to hickory-resolver

* rename all trust-dns-client references to hickory-client

* rename all trust-dns-proto references to hickory-proto

* rename all trust-dns-server references to hickory-server

* rename all trust-dns-compatibility references to hickory-compatability

* rename all trust-dns-integration references to hickory-integration

* rename all trust-dns-util references to hickory-util

* Update MIT licenses to reference Hickory DNS

* update all trust-dns references to hickory-dns

* update all bluejekyll github references to hickorydns org

* Update name in Changelog

* make sure hickory-dns logs during tests

* add changelogs for recent main additions

* fix references to trust-dns and hickory in architecture

* update a few trust-dns references in READMEs

* fixup some dangling trust_dns references

* replace fka with formerly in change log

* replace all hickoydns org references to hickory-dns

* replace all http links with https

* update logos

* update hickorydns to hickory-dns for all other org references

* fix Notices of Trust-DNS to Hickory in each Readme
2023-10-13 18:39:28 -07:00

3.3 KiB

Overview

Hickory DNS Async-Std Resolver is a library which implements the DNS resolver using the Hickory DNS Resolver library.

This library contains implementations for IPv4 (A) and IPv6 (AAAA) resolution, more features are in the works. It is built on top of the async-std async-io project, this allows it to be integrated into other systems using the async-std and futures libraries. The Hickory DNS project contains other libraries for DNS: a client library for raw protocol usage, a server library for hosting zones, and variations on the TLS implementation over rustls and native-tls.

NOTICE This project was rebranded from Trust-DNS to Hickory DNS and has been moved to the https://github.com/hickory-dns/hickory-dns organization and repo, from 0.24 and onward.

Features

  • Various IPv4 and IPv6 lookup strategies
  • /etc/resolv.conf based configuration on Unix/Posix systems
  • NameServer pools with performance based priority usage
  • Caching of query results
  • NxDomain/NoData caching (negative caching)
  • TBD (in tokio impl): DNSSEC validation
  • Generic Record Type Lookup
  • CNAME chain resolution
  • experimental mDNS support (enable with mdns feature)
  • TBD (in tokio impl): DNS over TLS (utilizing native-tls, rustls, and openssl; native-tls or rustls are recommended)
  • TBD (in tokio impl): DNS over HTTPS (currently only supports rustls)

Example

use std::net::*;
use async_std::prelude::*;
use async_std_resolver::{resolver, config};

#[async_std::main]
async fn main() {
  // Construct a new Resolver with default configuration options
  let resolver = resolver(
    config::ResolverConfig::default(),
    config::ResolverOpts::default(),
  ).await;

  // Lookup the IP addresses associated with a name.
  // This returns a future that will lookup the IP addresses, it must be run in the Core to
  //  to get the actual result.
  let mut response = resolver.lookup_ip("www.example.com.").await.unwrap();

  // There can be many addresses associated with the name,
  //  this can return IPv4 and/or IPv6 addresses
  let address = response.iter().next().expect("no addresses returned!");
  if address.is_ipv4() {
    assert_eq!(address, IpAddr::V4(Ipv4Addr::new(93, 184, 216, 34)));
  } else {
    assert_eq!(address, IpAddr::V6(Ipv6Addr::new(0x2606, 0x2800, 0x220, 0x1, 0x248, 0x1893, 0x25c8, 0x1946)));
  }
}

Minimum Rust Version

The current minimum rustc version for this project is 1.67

Versioning

Hickory DNS does its best job to follow semver. Hickory DNS will be promoted to 1.0 upon stabilization of the publicly exposed APIs. This does not mean that Hickory DNS will necessarily break on upgrades between 0.x updates. Whenever possible, old APIs will be deprecated with notes on what replaced those deprecations. Hickory DNS will make a best effort to never break software which depends on it due to API changes, though this can not be guaranteed. Deprecated interfaces will be maintained for at minimum one major release after that in which they were deprecated (where possible), with the exception of the upgrade to 1.0 where all deprecated interfaces will be planned to be removed.