configurable whether blocking mode for the interface device on linux

[warriorpaw]

need blocking mode in some case

[songgao]

Could you explain your use case please? I'm having a hard time seeing how this can be useful.

[warriorpaw]

Could you explain your use case please? I'm having a hard time seeing how this can be useful.

https://github.com/songgao/water#tap-on-linux
In nonblock mode.
n, err := ifce.Read([]byte(frame))
will return err 'read tun: resource temporarily unavailable'.
I want to blocked read data in a goroutine, put data in channels then work with it in other goroutines.
Using go1.10.4 & ubuntu 18.04.

[songgao]

@warriorpaw sorry for the slow response. I can't reproduce this with go1.12.1. Presumably in a reasonably recent Go version this should already be taken care of by internal handling of nonblock stuff in Go. Could you share what Go version you're running?

[warriorpaw]

go1.10.4 linux/amd64 on Ubuntu 18.04