#import <ifaddrs.h>

import <arpa/inet.h>
// Get IP Address

(NSString )getIPAddress {

  NSString address = @"error";
  struct ifaddrs interfaces = NULL;
  struct ifaddrs temp_addr = NULL;
  int success = 0;
  // retrieve the current interfaces - returns 0 on success
  success = getifaddrs(&interfaces);
  if (success == 0) {
  // Loop through linked list of interfaces
  temp_addr = interfaces;
  while(temp_addr != NULL) {
      if(temp_addr->ifa_addr->sa_family == AF_INET) {
          // Check if interface is en0 which is the wifi connection on the iPhone
          if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
              // Get NSString from C String
              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;}</pre>