Why not UDP [LWN.net]

Why not UDP

Posted Dec 31, 2024 1:19 UTC (Tue) by josh (subscriber, #17465)
In reply to: Why not UDP by Cyberax
Parent article: The Homa network protocol

You can send and receive raw IP from userspace: https://www.man7.org/linux/man-pages/man7/raw.7.html

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Why not UDP

Posted Dec 31, 2024 1:21 UTC (Tue) by Cyberax (✭ supporter ✭, #52523) [Link] (1 responses)

Raw sockets require special permissions, and are in general not great for performance, if you have multiple listeners (i.e. multiple applications using Homa).

Why not UDP

Posted Dec 31, 2024 1:24 UTC (Tue) by josh (subscriber, #17465) [Link]

That's a much better argument for UDP, sure. I was noting that it's *possible* to write raw IP protocols from userspace.