Swift - Get device's WIFI IP Address

According to several SO threads (e.g. What exactly means iOS networking interface name? what's pdp_ip ? what's ap?), the WiFi interface on an iOS device always has then name "en0".

Your code (which seems to be what I answered at How to get Ip address in swift :) retrieves a list of the IP addresses of all running network interfaces. It can easily be modified to return only the IP addressof the "en0" interface, and actually that is what I originally hadanswered at that thread (and this is just a Swift translation of theanswer to how to get ip address of iphone programmatically):

// Return IP address of WiFi interface (en0) as a String, or `nil`func getWiFiAddress() -> String? {    var address : String?    // 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 {            defer { ptr = ptr.memory.ifa_next }            let interface = ptr.memory            // Check for IPv4 or IPv6 interface:            let addrFamily = interface.ifa_addr.memory.sa_family            if addrFamily == UInt8(AF_INET) || addrFamily == UInt8(AF_INET6) {                // Check interface name:                if let name = String.fromCString(interface.ifa_name) where name == "en0" {                    // Convert interface address to a human readable string:                    var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)                    getnameinfo(interface.ifa_addr, socklen_t(interface.ifa_addr.memory.sa_len),                                &hostname, socklen_t(hostname.count),                                nil, socklen_t(0), NI_NUMERICHOST)                    address = String.fromCString(hostname)                }            }        }        freeifaddrs(ifaddr)    }    return address}

Usage:

if let addr = getWiFiAddress() {    print(addr)} else {    print("No WiFi address")}

Update for Swift 3: In addition to adopting the code to themany changes in Swift 3,iterating over all interfaces can now use the new generalizedsequence() function:

Do NOT forget to add #include <ifaddrs.h> in your bridging header

// Return IP address of WiFi interface (en0) as a String, or `nil`func getWiFiAddress() -> 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:            let name = String(cString: interface.ifa_name)            if  name == "en0" {                // 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}

For those of you who came looking for more than the WIFI IP you could modify this code a little

func getAddress(for network: Network) -> 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:            let name = String(cString: interface.ifa_name)            if name == network.rawValue {                // 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}

enum Network: String {    case wifi = "en0"    case cellular = "pdp_ip0"    //... case ipv4 = "ipv4"    //... case ipv6 = "ipv6"}

Then we have access to the cellular IP as well.

guard let wifiIp = getAddress(for: .wifi) else { return }

&

guard let cellularIp = getAddress(for: .cellular) else { return }

To get IPAddress for wifi , wired, and cellular - swift 5

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 }            guard let interface = ptr?.pointee else { return "" }            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 ?? ""}

How to use

let strIPAddress : String = self.getIPAddress()print("IPAddress :: \(strIPAddress)")

Note : Add this below in your project's Bridging-Header file

#include<ifaddrs.h>

Create bridging header and Include #include <ifaddrs.h> in it.

then write this method

func getIFAddresses() -> [String] {var addresses = [String]()// Get list of all interfaces on the local machine:var ifaddr : UnsafeMutablePointer<ifaddrs> = nilif getifaddrs(&ifaddr) == 0 {    // For each interface ...    for (var ptr = ifaddr; ptr != nil; ptr = ptr.memory.ifa_next) {        let flags = Int32(ptr.memory.ifa_flags)        var addr = ptr.memory.ifa_addr.memory        // 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) {                // Convert interface address to a human readable string:                var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)                if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),                    nil, socklen_t(0), NI_NUMERICHOST) == 0) {                        if let address = String.fromCString(hostname) {                            addresses.append(address)                        }                }            }        }    }    freeifaddrs(ifaddr)}  return addresses}

when I call this method in my viewController like var arr : NSArray = self.getIFAddresses() I get perfect response in my console like

IP :( "10.0.0.94")

from this array you can access it where ever u want.Hope it helps