Why the SCNetworkInterfaceGetConfiguration function return nil?

We do not understand why , in the following code sequence , all the get functions return the right value , and not the first one SCNetworkInterfaceGetConfiguration which returns nothing ?

<

let arr: CFArray = SCNetworkInterfaceCopyAll()

let interfaces: [SCNetworkInterface] = arr as! [SCNetworkInterface]

for interface in interfaces {

let intDic: CFDictionary? = SCNetworkInterfaceGetConfiguration(interface)

if intDic != nil {

print (intDic)

}


if let bsd: String = SCNetworkInterfaceGetBSDName(interface) as String? {

print (bsd)

}

if let adress: String = SCNetworkInterfaceGetHardwareAddressString(interface) as String? {

print (adress)

}

if let type: String = SCNetworkInterfaceGetInterfaceType(interface) as String? {

print (type)

}

if let local: String = SCNetworkInterfaceGetLocalizedDisplayName(interface) as String? {

print (local)

}

let typeId: CFTypeID = SCNetworkInterfaceGetTypeID()

if let intSup: CFArray = SCNetworkInterfaceGetSupportedInterfaceTypes(interface) as CFArray? {

print (intSup)

}

if let prot: [String] = SCNetworkInterfaceGetSupportedProtocolTypes(interface) as? [String] {

print (prot)

}

}

>

macos 10.15.4 xcode 11.4.1

Replies

nil is a valid result if the interface has no configuration

Thank's

But is it possible to get the others informations (SDName, HardwareAdress, etc) without configuration ?

Is it possible to have an interface not configured ?