Swift Get IP address of current device in wifi and cellular - swift

Question

func getIPAddress() -> String {
var address: String?
var ifaddr: UnsafeMutablePointer<ifaddrs>? = nil
if getifaddrs(&ifaddr) == 0 {
var ptr = ifaddr
while ptr != nil {
defer { ptr = ptr?.pointee.ifa_next }
let interface = ptr?.pointee
let addrFamily = interface?.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// wifi = ["en0"]
// wired = ["en2", "en3", "en4"]
// cellular = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
let name: String = String(cString: (interface!.ifa_name))
if name == "en0" || name == "en2" || name == "en3" || name == "en4" || name == "pdp_ip0" || name == "pdp_ip1" || name == "pdp_ip2" || name == "pdp_ip3" {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface?.ifa_addr, socklen_t((interface?.ifa_addr.pointee.sa_len)!), &hostname, socklen_t(hostname.count), nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
}
return address ?? ""
}
I have use this one and run the program in iOS simulator its giving nil value. I have added the Bridging-Header file and #include in it.
for retrieve the value I have used
let stringIPAddress : String = self.getIPAddress()
can I know is that possible to get IP address with simulator

Answer 1

Code works for Swift 5+ and iOS 13+
To get IPAddress of device on turning Wifi or Wired or Mobile data ON, use below method :
func getIPAddress() -> String? {
var address : String?
// Get list of all interfaces on the local machine:
var ifaddr : UnsafeMutablePointer<ifaddrs>?
guard getifaddrs(&ifaddr) == 0 else { return nil }
guard let firstAddr = ifaddr else { return nil }
// For each interface ...
for ifptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {
let interface = ifptr.pointee
// Check for IPv4 or IPv6 interface:
let addrFamily = interface.ifa_addr.pointee.sa_family
if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {
// Check interface name:
// wifi = ["en0"]
// wired = ["en2", "en3", "en4"]
// cellular = ["pdp_ip0","pdp_ip1","pdp_ip2","pdp_ip3"]
let name = String(cString: interface.ifa_name)
if name == "en0" || name == "en2" || name == "en3" || name == "en4" || name == "pdp_ip0" || name == "pdp_ip1" || name == "pdp_ip2" || name == "pdp_ip3" {
// Convert interface address to a human readable string:
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.pointee.sa_len),
&hostname, socklen_t(hostname.count),
nil, socklen_t(0), NI_NUMERICHOST)
address = String(cString: hostname)
}
}
}
freeifaddrs(ifaddr)
return address
}
Here, code/checks works for Wifi, Wired and Mobile data is:
if name == "en0" || name == "en2" || name == "en3" || name == "en4" || name == "pdp_ip0" || name == "pdp_ip1" || name == "pdp_ip2" || name == "pdp_ip3"
Hope will be helping! :)

Answer 2

I've been using this code, which has worked in simulator as well as playgrounds:
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
}
}
And then you can do something like this:
for interface in EnumerateNetworkInterfaces.enumerate() {
print("\(interface.name): \(interface.ip)")
}