Finding DNS server settings programmatically on Mac OS X

Question

I have some cross platform DNS client code that I use for doing end to end SMTP and on windows I can find the current DNS server ip addresses by looking in the registry. On

Answer 1

I know its very late to answer this question but may be helpful for the others.

This Code will help out for this task ..

SCPreferencesRef _prefsDNS = SCPreferencesCreate(NULL, CFSTR("DNSSETTING"), NULL);

CFArrayRef services = SCNetworkServiceCopyAll(_prefsDNS);

if (services) {
long count = CFArrayGetCount(services);
for (int i = 0; i < count; i++) {
service = CFArrayGetValueAtIndex(services, i);
interface = SCNetworkServiceGetInterface(service);
NSString *interfaceServiceID = (__bridge NSString*)SCNetworkServiceGetServiceID(service);
CFStringRef primaryservicepath = CFStringCreateWithFormat(NULL,NULL,CFSTR("State:/Network/Service/%@/DNS"),interfaceServiceID);
        //    NSLog(@"%@",primaryservicepath);


SCDynamicStoreRef dynRef=SCDynamicStoreCreate(kCFAllocatorSystemDefault, CFSTR("DNSSETTING"), NULL, NULL);
                // NSLog(@"%@",dynRef);
CFDictionaryRef dnskey = SCDynamicStoreCopyValue(dynRef,primaryservicepath);

           //     NSLog(@"%@",dnskey);
//dnskey will give you the DNS server address.