Rust 1.37.0 - Hackdot

Re:Rust 1.37.0 by nineteen999 on Thursday August 15, 2019 @09:46PM (#20711457)

Thanks for the advice regarding bindgen etc, I will look into that when I have more time. Generating the compatible structures (if Rust doesn't have them already) is one part of the problem, the other is really just the sendto() and socket() calls which as I mentioned are basically syscall wrappers for the most part. As per my other email, if I was writing this program in Rust, I'd prefer to use Rust all the way down rather then calling into C. Otherwise it's a Rust wrapper around C facilities. It should be possible do it all in native Rust code as far as I am concerned.

As per my other message, I apologize if I have offended you, it certainly wasn't my intention, I was just trying to clarify the use of the raw IP API, as opposed to the higher level solution which wouldn't work for our simulator.

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Re:Rust 1.37.0 by burntsushi on Thursday August 15, 2019 @09:51PM (#20711491)

> It should be possible do it all in native Rust code as far as I am concerned.

Yeah, it would be, but Rust's standard library doesn't provide any way to invoke syscalls. You either need to go through libc's syscall wrapper, or write Assembly. I used the former to get access to faster directory traversal: https://github.com/BurntSushi/walkdir/blob/ec33af7f9b25afefc... (The rest of that code in that module may be interesting to you, since the API for getdents is pretty interesting and very C-like. Buttoning it up behind a safe API that can never be misused took a bit of thinking.)

Besides, Rust's standard library, on Linux at least, currently requires libc anyway. So you're already going to be linking to it.

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