Get Local Wifi IP address on iOS and Android

android.java

import android.net.wifi.WifiManager;
import android.content.Context;
import java.net.InetAddress;
import java.nio.ByteOrder;

private String getLocalWifiIpAddress() {
    WifiManager wifiManager = (WifiManager) context.getSystemService(WIFI_SERVICE);
    int ipAddress = wifiManager.getConnectionInfo().getIpAddress();

    if (ByteOrder.nativeOrder().equals(ByteOrder.LITTLE_ENDIAN)) {
        ipAddress = Integer.reverseBytes(ipAddress);
    }

    byte[] ipByteArray = BigInteger.valueOf(ipAddress).toByteArray();

    String ipAddressString;
    try {
        ipAddressString = InetAddress.getByAddress(ipByteArray).getHostAddress();
    } catch (UnknownHostException ex) {
        ipAddressString = null;
    }

    return ipAddressString;
}

ios.m

#include <ifaddrs.h>
#include <arpa/inet.h>

- (NSString *)getLocalWifiIpAddress {
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    success = getifaddrs(&interfaces);
    if (success == 0) {
        temp_addr = interfaces;
        while(temp_addr != NULL) {
            if(temp_addr->ifa_addr->sa_family == AF_INET) {
                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    // Free memory
    freeifaddrs(interfaces);
    return address;
}

LocalWifiIP.md

Get Local Wifi IP address on iOS and Android

This Gist provide the function to retrieve the local IP address of the device when connected to the wifi.

iOS

No permission is required from the user to access the information. It uses the getifaddrs method that is not directly part of the public iOS API but it's still perfectly fine to use it and allowed by Apple.

Sources

https://web.archive.org/web/20160527165909/http://www.makebetterthings.com/iphone/how-to-find-ip-address-of-iphone/ https://stackoverflow.com/questions/6807788/how-to-get-ip-address-of-iphone-programmatically

Android

The following permission is required in your AndroidManifest.xml:

Sources

https://stackoverflow.com/questions/16730711/get-my-wifi-ip-address-android