support tls ?

[John0420]

if use tls.Listen(), netpoll.must Will fail,The reason for the failure is "could not get file descriptor", so support tls?

[Ant C]

I was able to get TLS to work using netpoll.NewDesc(fd, netpoll.EventRead)

to get the fd from the tls.Conn, I had to use reflection

    func FDFromTLSConn(conn net.Conn) int {
   	tls := reflect.TypeOf(conn) == reflect.TypeOf(&tls.Conn{})
   	tcpConn := reflect.Indirect(reflect.ValueOf(conn)).FieldByName("conn")
   	if tls {
    		tcpConn = reflect.Indirect(tcpConn.Elem())
   	}
   	fdVal := tcpConn.FieldByName("fd")
   	pfdVal := reflect.Indirect(fdVal).FieldByName("pfd")
   
   	return int(pfdVal.FieldByName("Sysfd").Int())
   }

you also have to set the fd to non-blocking

    func setNonblock(fd int, nonblocking bool) (err error) {
    	return syscall.SetNonblock(fd, nonblocking)
    }

[Agniva De Sarker]

Even that doesn't work properly. I kept getting errors during writing to the websocket:
write tcp [::1]:8065->[::1]:22191: write: bad file descriptor
write tcp [::1]:8065->[::1]:22391: write: connection reset by peer

This needs to be supported properly from the standard library.

[Ant C]

I'm on a mac and that worked for me, so it could be the difference between kqueue and epoll. I replaced this code with opening a tcp connection and then promoting it to a tls.Conn

 ln, err := net.Listen("tcp", *addr)
 if err != nil {
     panic(err)
 }
 defer ln.Close()
 tcpConn, err := ln.(*net.TCPListener).AcceptTCP()
 if err != nil {
     panic(err)
 }
 tlsConn := tls.Server(tcpConn, tlsConfig)
 if err := tlsConn.Handshake(); err != nil {
     panic(err)
 }
 desc := netpoll.Must(netpoll.HandleRead(tcpConn))