Advice on using KTLS with `splice`?

[jeromegn]

(Hey there! 👋)

We're looking into using splice for some transfers of IO and I'm wondering if it's possible with this crate.

My concern is that it might buffer some data that's not part of the TLS handshake (as mentioned in the docs for the CorkStream). So if I do want to use splice, should I do the first read / write using userspace copy? If I knew that there was buffered data, I could skip this step.

[cxw620]

Feel free to use it, you shall just handle the drained data return by tls_stream.into_raw() after you have ktls set up (I just reuse it as the buffer parsing HTTP/1.1 request with httparse, and after you write http/1.1 status line and header lines, just do splice. You may need tokio-splice2 that I modify from tokio-splice for single direction copy).