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Trust-dns crate

As explained in Rust in Action: Systems programming concepts and techniques

The trust-dns crate is a Rust library for constructing, sending, and interpreting DNS protocol messages.

The trust-dns crate is a Rust library for constructing, sending, and interpreting DNS protocol messages. It follows RFC 1035 and several later RFCs, while exposing DNS terminology through Rust types. section 8.4.2

A small hostname resolver uses the crate to:

  • Serialize structured data into bytes, send it across the network, decode the response, and print the address. section 8.4.2

Constructing an IPv4 query

A resolver creates a message, assigns a random identifier, marks it as a query, adds Query::query(domain_name, RecordType::A), and requests recursion. The completed program accepts a hostname and optional DNS server, such as 1.1.1.1, then returns an IP address.

How Rust in Action: Systems programming concepts and techniques covers it

How deep it goes
Explains the resolver pipeline and message types, but leaves much of DNS protocol detail and robust error handling for later.
Examples
Uses a Rust resolve utility that queries www.rustinaction.com and constructs an A-record request with Message and Query.
What it assumes
Assumes basic Rust command-line and networking familiarity while introducing DNS messages, queries, records, and wire serialization.
What you can do after
Build it from scratch: create a Rust command-line resolver that queries a configurable DNS server for a hostname’s IPv4 address.
How it connects
Connects DNS messages with queries, domain names, IPv4 records, serialization, UDP sockets, and RFC 1035.
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