rust-lang / rust-lang/rfcs

Handling ICMP messages in UdpSocket::recv/recv_from

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Description

When running a UDP server, it is helpful to learn if we got ICMP messages (e.g. regarding MTU or unreachability). On Unix, we can do this via recvmsg, e.g. here. It would be great if rust std can incorporate this.

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Research direction

Start with the UdpSocket::recv and recv_from APIs and the linked Unix recvmsg example. Determine how ICMP messages such as MTU or unreachable notifications should be exposed by std, then define the expected behavior and API before implementation; done means UDP servers can receive those notifications.

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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
30/100

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