Make Better Things

The iOS SDK does not provide any simple way to get IP address of device programmatically. So the only way left is to get it by c code. So here we go -

Step 1 – Add these header file in your code -

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

Step 2 – And here is the real code -

- (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; 

} 

Hope it saves someone’s time!