Programmatically get WiFi Gateway, DNS info

kevinyide · 06-29-2010, 10:56 AM

I am able to get the wifi IP address information to which my iPhone is connected from the following code that i found online:

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; 
}

Is it possible to identify the DNS & gateway information as well?
Any code that does it?
Thanks,
Kevin

kevinyide · 07-01-2010, 01:51 AM

figured that

Code:

temp_addr->ifa_netmask
temp_addr->ifa_dstaddr

would get me the subnet mask & broadcast address.
Anyone knowing how to get the DNS info or Gateway address?

eyalbern · 11-23-2010, 10:57 AM

any luck in finding the DNS ?