Section 8.1: When using encrypted DNS translation may also be needed.

[momoka0122y]

8.1. IPv4 Address Literals
Such translation also applies to any IPv4 address hints received in SVCB RRs.
The mention of SVCB RRs makes this section a lot more meaningful as IP address literals may not have been so common but with SVCB RRS they will be common even in a client/server scenario.

The other case that is common is when you’re using encrypted DNS (DoT/DoH/etc) and asking for both address families. That’s common to then get v4 answers that need to be translated.

From reply from Tommy.
https://mailarchive.ietf.org/arch/msg/v6ops/2csKJzBti4Mmb5vdWXp4-kzPd1k/

So maybe

- Such translation also applies to any IPv4 address hints received in SVCB RRs.
+ Such translation also applies to any IPv4 address hints received in SVCB RRs or when using encrypted DNS (DoT/DoH/etc).

[bashi]

I'm not sure we need to update this sentence. My understanding of Tommy's reply is about addresses from A/AAAA answers, which are already covered?

[nidhijaju]

If client applications or users wish to connect to IPv4 address literals, the Happy Eyeballs engine will need to perform NAT64 address synthesis for them. The solution is similar to "Bump-in-the- Host" [RFC6535] but is implemented inside the Happy Eyeballs library.

When an IPv4 address is passed into the library instead of a hostname, the device queries the network for the NAT64 prefix using "Discovery of the IPv6 Prefix Used for IPv6 Address Synthesis" [RFC7050] and then synthesizes an appropriate IPv6 address (or several) using the encoding described in "IPv6 Addressing of IPv4/ IPv6 Translators" [RFC6052]. The synthesized addresses are then inserted into the list of addresses as if they were results from DNS queries; connection attempts follow the algorithm described above (see Section 6).

Such translation also applies to any IPv4 address hints received in SVCB RRs.

This is the entirety of Section 8.1. It might be worth adding a note that says something like it also applies to "IPv4 addresses received in A records".