Objective-C method to retrieve the IP address of the wifi connection as a NSString.
- (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;
}
if this isn’t working for you you may need to include the following C headers in the top of your class implementation as well
#include <ifaddrs.h>
#include <arpa/inet.h>