rust-lang / rust-lang/rfcs

Support zone id when parsing / formatting SocketAddrV6

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Description

SocketAddrV6 contains a field scope_id (AKA zone id in RFCs).

In RFC4007, a textual representation for an IPv6 address with a zone id is specified, where the zone id is appended to the ipv6 address with % as a separator.

I think it would be very useful and quite easy to add parsing of a numeric zone id to read_socket_addr_v6.

For improved usability, adding support for interface names would be nice, but those would need to be converted to interface indices using OS specific interfaces (like libc::if_nametoindex on linux).

When formatting a SocketAddrV6, the zone id could be printed if it's not 0. (But that could be seen as an incompatible change.)

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the SocketAddrV6 scope_id field and the read_socket_addr_v6 entry point described in the issue, then review RFC4007 section 11. Define the treatment of numeric zone IDs, interface names, and formatting when scope_id is nonzero; the work is complete when those choices are specified and their compatibility implications are resolved.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
networking
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
25/100

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