Async TcpStream

[relufi]

I encountered an exception while running the following code

let stream = smol::Async::<std::net::TcpStream>::connect("one.one.one.one:80".to_socket_addrs().unwrap().next().unwrap()).await;

Err(Os { code: 88, kind: Unsupported, message: "Function not implemented" })

The error is here
https://github.com/esp-rs-compat/socket2/blob/9cdd55ac7abc59aa6613a1302eb3d8bcdbe56ab7/src/socket.rs#L707

[ivmarkov]

Coincidentally, we discussed precisely this issue with another user on the forum.

What we need to do is patch the socket2 crate (note that it is forked and partially patched already), and remove (for ESP-IDF only, i.e. #[cfg(not(target_os = "esp-idf"))]) ALL settings of the *CLOEXEC flags on the socket file descriptors, because this flag is not supported by ESP-IDF / LwIP and causes your failure.

Are you up for that?

[ivmarkov]

This should be fixed now. You might need to remove your socket2 checkout from ~/.cargo as the fix was force-pushed.

Please reopen if it still does not work for you.