Add CXX child crate #18
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Is the plan for dcsctp to be an alternative to https://github.com/sctplab/usrsctp or https://github.com/webrtc-rs/sctp-proto |
boivie
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dcsctp-cxx/.gitignore
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| /examples/main | |||
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Could you move this to the top level .gitignore instead? Makes it easier to maintain.
dcsctp-cxx/src/lib.rs
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| fn delete_socket(socket: *mut DcSctpSocket) { | ||
| if !socket.is_null() { | ||
| unsafe { |
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Add a // SAFETY: ... comment explaining why this is safe
dcsctp-cxx/src/lib.rs
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| if !socket.is_null() { | ||
| unsafe { | ||
| // Re-take ownership of the Box and drop it. | ||
| let _ = Box::from_raw(socket); |
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Could you do this instead?
drop(Box::from_raw(socket));
dcsctp-cxx/src/lib.rs
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| } | ||
| } | ||
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| unsafe fn state(socket: *const DcSctpSocket) -> ffi::SocketState { |
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Can you take a &DcSctpSocket instead of *const DcSctpSocket?
dcsctp-cxx/src/lib.rs
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| #[allow(dead_code)] |
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Is this needed? It's pub so why would it complain about being unused? Does this have to be pub by the way?
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Let's see what CI says now.
This adds CXX FFI for the dcSCTP rust library to integrate it into a C++ application.
Yeah, this is not really the right place, but: This is a Rust version of https://webrtc.googlesource.com/src/+/refs/heads/main/net/dcsctp, and the goal is to make this library have feature and stability parity with that one. Compared to e.g. usrsctp, this library only aims to implement the parts of SCTP that are required to support data channels in WebRTC, And yes, RFC8260 is supported. |
| Box::into_raw(boxed_socket) | ||
| } | ||
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| unsafe fn delete_socket(socket: *mut DcSctpSocket) { |
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I think you can move the unsafe block to only be around the drop call.
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I can, but as a raw pointer is passed in, I'm promising a lot. If garbage is passed in, bad things happen, so callers have to be careful and only pass valid data.
A well known LLM strongly suggests I should mark it as unsafe.
dcsctp-cxx/src/lib.rs
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| use dcsctp::api::SocketState as DcSctpSocketState; | ||
| use std::time::Instant; | ||
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| #[cxx::bridge] |
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Did you want to add a namespace or not?
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That commit got lost, done.
To avoid polluting the default namespace.
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It currently has a single function, to query the library's version, to validate that the C++ FFI is working correctly.