Get the IP address of an iOS device.

getIPAddress.m

- (NSString *) getIPAddress
{
    NSString *address = nil;
    
    structifaddrs *interfaces = NULL;
    structifaddrs *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 ([[NSStringstringWithUTF8String: temp_addr->ifa_name] isEqualToString: @"en0"])
                {
                    address = [NSStringstringWithUTF8String:
                               inet_ntoa(((structsockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            
            temp_addr = temp_addr->ifa_next;
        }
    }
    
    freeifaddrs(interfaces);
    
    return address;
}