How to set timeout for connect?

[SelvaBalasubramanian]

I need to set timeout for socket.connect(ip ,port) how can I do it?

[billabt]

The easiest way is to use the isReadableOrWritable function. The basic steps are as follows:

1. Create the socket.
2. Set the socket to non-blocking mode using setBlocking(mode: false).
3. Issue the connect.
4. Call isReadableOrWritable(waitForever: false, timeout: yourTimeout) function on the socket using your desired timeout.
5. If the returned tuple indicates that it's writable, you're connected, if not, the timeout has occurred.
6. Reset the blocking mode back to blocking if desired...

[SelvaBalasubramanian]

I tried but the same problem occurs.The problem what I am facing is when the socket.connect(ip, port) starts executing it waits for some time to connect.

[SelvaBalasubramanian]

here is the code!!
I need to implement a network scan...for availability of a particular ip and port...
`

func searchController(){
    let ipString = "192.168.1."
    let port = 8286
    var k = 1
    
    let socket = try? Socket.create()
    while(k <= 255){

        let ip = ipString + "\(k)"
        try? socket?.setBlocking(mode: false)
        print("function entered")
            try?  socket?.connect(to: ip , port: Int32(port))
           print(k)
        let result = try? socket?.isReadableOrWritable(waitForever: false, timeout: UInt(0
        ))
        
        if result??.writable != nil {
            if result.unsafelyUnwrapped?.writable == true{
                print(ip  + " " + "\(port)" )
            }
            }else{
                socket?.close()
            }else{
                 socket?.close()
             }
     k +=  1

}
    
}`

[SelvaBalasubramanian]

i tried but it still waits in socket?.connect(to: ip , port: Int32(port))

[mna]

I can confirm the same behaviour for me on Darwin, see https://github.com/mna/testconnecttimeout to reproduce. Blocks on the call to socket.connect even though the socket is in non-blocking mode.

[billabt]

Fixed in 0.12.60.