Thanks for your quick response.
The key purpose is finding out the current connected Network Interface.
Ex:
- The Wi-Fi connection is en0 (default).
- I used an adapter USB-C to RJ45 to connect a LAN connection → I could not find out which Network Interface is used for it programmatically. (sometime is en8, sometime is en15 and it depending on each different adapters I connected).
I used this function to get the current available Network Interface. Is there any newer supported function ? Can we use these lines of code for future?
public class EnumerateNetworkInterfaces {
public struct NetworkInterfaceInfo {
let name: String
let ip: String
let netmask: String
}
public static func enumerate() -> [NetworkInterfaceInfo] {
var interfaces = [NetworkInterfaceInfo]()
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
// For each interface ...
var ptr = ifaddr
while( ptr != nil) {
let flags = Int32(ptr!.pointee.ifa_flags)
var addr = ptr!.pointee.ifa_addr.pointee
// Check for running IPv4, IPv6 interfaces. Skip the loopback interface.
if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {
if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {
var mask = ptr!.pointee.ifa_netmask.pointee
// Convert interface address to a human readable string:
let zero = CChar(0)
var hostname = [CChar](repeating: zero, count: Int(NI_MAXHOST))
var netmask = [CChar](repeating: zero, count: Int(NI_MAXHOST))
if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
let address = String(cString: hostname)
let name = ptr!.pointee.ifa_name!
let ifname = String(cString: name)
if (getnameinfo(&mask, socklen_t(mask.sa_len), &netmask, socklen_t(netmask.count),
nil, socklen_t(0), NI_NUMERICHOST) == 0) {
let netmaskIP = String(cString: netmask)
let info = NetworkInterfaceInfo(name: ifname,
ip: address,
netmask: netmaskIP)
interfaces.append(info)
}
}
}
}
ptr = ptr!.pointee.ifa_next
}
freeifaddrs(ifaddr)
}
return interfaces
}
}
Best regards,
