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A comment on Rootless Pings in Rust. Parent comment

Re:Rootless Pings in Rust by seba_dos1 on Tuesday December 02, 2025 @08:51AM (#46121169)
Think of it as a protocol for sending custom ("user") datagrams. There are other datagram protocols too.

The kernel API defaults to UDP when you pass 0 as the protocol for a datagram socket, which may be the source of the confusion.

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