iOS Get IP Address in app.( via Wifi )

GetIPAddress.m

#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;  
  
}