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get iphone ip address

/ Published in: Objective C
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  1. #include <ifaddrs.h>
  2. #include <arpa/inet.h>
  3.  
  4.  
  5. - (NSString *)getIPAddress
  6. {
  7. 	NSString *address = @"error";
  8. 	struct ifaddrs *interfaces = NULL;
  9. 	struct ifaddrs *temp_addr = NULL;
  10. 	int success = 0;
  11.  
  12. 	// retrieve the current interfaces - returns 0 on success
  13. 	success = getifaddrs(&interfaces);
  14. 	if (success == 0)
  15. 	{
  16. 		// Loop through linked list of interfaces
  17. 		temp_addr = interfaces;
  18. 		while(temp_addr != NULL)
  19. 		{
  20. 			if(temp_addr->ifa_addr->sa_family == AF_INET)
  21. 			{
  22. 				// Check if interface is en0 which is the wifi connection on the iPhone
  23. 				if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en1"])
  24. 				{
  25. 					// Get NSString from C String
  26. 					address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
  27. 				}
  28. 			}
  29.  
  30. 			temp_addr = temp_addr->ifa_next;
  31. 		}
  32. 	}
  33.  
  34. 	// Free memory
  35. 	freeifaddrs(interfaces);
  36.  
  37. 	return address;
  38. }

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