Running code on the RawFd before connecting a TcpStream?

#1

I’m experimenting with Android VpnService.
Any outgoing socket connection needs to be protected by calling a Java method with the socket fd passed in before connecting, but our TcpStream immediately connects to the server.
Is there any way to achieve this?

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#2

net2’s TcpBuilder can probably help: https://doc.rust-lang.org/net2-rs/net2/struct.TcpBuilder.html

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#3

Is there anything similar in Tokio?

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#4

You can create a tokio tcpstream from a std::net one: https://tokio-rs.github.io/tokio-core/tokio_core/net/struct.TcpStream.html#method.connect_stream.

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