Netaddr.ip: a new IP address type for Go

• go

  2,075 119,718 10.0 Go

  The Go programming language

  

Mostly we optimize at the application layer (e.g. we do lazy on-demand WireGuard tunnel configuration, to minimize how much state sits around idle). We also have a small fork of Go with some space-optimizing changes: https://github.com/golang/go/compare/master...tailscale:tail... (most of these changes get upstreamed, albeit delayed by one release cycle).

Aside from that, Go's also just not a big garbage generator in general, compared to older GC'd languages like Java, so with a little care you can keep the pressure off.

That said, if anyone at Apple's listening, it would sure be nice to have, say, 30MiB ;). 15MiB makes it possible to cram a whole mesh networking stack in, but doesn't make it fun.

• rust

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Appears to be 16 bytes on Windows (larger of the two variants): https://github.com/rust-lang/rust/blob/master/library/std/sr...

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• wireguard-go

  14 2,729 6.3 Go

  Mirror only. Official repository is at https://git.zx2c4.com/wireguard-go

  

> The story begins in April 2019 with 89476f8cb5 in which David Crawshaw, aware of all these problems, created an IP type like:

It's in a PR here: https://github.com/WireGuard/wireguard-go/pull/11/files

Which mentions:

> Typically throughout WireGuard, we've used [4]byte for v4 and [16]byte for v6, considering the Go standard library's choice of v6-mapped-v4 to be a mistake.

It actually looks useful, there's something similar in wgtypes, and I wanted to use it recently [0] but that package unfortunately doesn't expose a way to write it out to a string/buffer, so I ended up almost replicating it.

[0] https://github.com/OJFord/terraform-provider-wireguard/blob/...

(There's a lot of ways of presenting/parsing/constructing the same config options there! I'm sure if I were more fluent in Go there's some more succinct way.)

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