themifi / dns-resolver Goto Github PK

The DNS response contains the response code in the flags field.
It means the status of the operation.

The important codes:

• NOERROR -- success
• NXDOMAIN -- doesn't exist
• SERVFAIL -- error happened.

Need to check for the result code in the code.

Draw an image about the DNS resolver.
Explain visually the main purpose of the DNS resolver and what does it do.
See the similar image from Cloudflare's docs.

Validate DNS resolver against publicly available DNS resolver, like the Cloudflare's 1.1.1.1.

CI uses the actions in archive: https://github.com/actions-rs
The clippy actions always fail with unclear error:

I suggest switching to simpler workflows, like: https://github.com/dtolnay/rust-toolchain

https://implement-dns.wizardzines.com/book/exercises#make-it-work-with-cname-records

https://implement-dns.wizardzines.com/book/part_1

https://implement-dns.wizardzines.com/book/exercises#cache-dns-records

In: "www.facebook.com"
Out: '9.115.116.97.114.45.109.105.110.105.4.99.49.48.114.192.16'

https://implement-dns.wizardzines.com/book/exercises#make-your-resolver-into-a-dns-server

Implement CI: linting, build, tests and release deployment.

https://implement-dns.wizardzines.com/book/exercises#implement-tcp-dns

https://implement-dns.wizardzines.com/book/exercises#support-other-record-types-by-name

https://implement-dns.wizardzines.com/book/part_3

https://implement-dns.wizardzines.com/book/part_2

https://implement-dns.wizardzines.com/book/exercises#don-t-allow-loops-in-dns-compression

About decode_dns_name and decode_compressed_dns_name:

This code as implemented actually has a security vulnerability – see Exercise 3 for more about that.

What is the bug?

In: lookup_domain("www.metafilter.com")
Out: '192.16'

https://implement-dns.wizardzines.com/book/exercises#implement-edns0-extended-dns

Better reword this sentence:

It resolves IP addresses for domains.

Cloudflare mentions this as DNS translates domains to IP addresses.