How to perform DNS query on iOS
- by yasirmturk
i want to perform some DNS queries e.g. to get IP records against a specific domain name, i am looking for a preferred way or some useful snippet for this on iOS 3.2+ SDK.
thanx in advance
part from other snippets i found this code
Boolean result;
CFHostRef hostRef;
NSArray *addresses;
NSString *hostname = @"apple.com";
hostRef = CFHostCreateWithName(kCFAllocatorDefault, (CFStringRef)hostname);
if (hostRef) {
result = CFHostStartInfoResolution(hostRef, kCFHostAddresses, NULL); // pass an error instead of NULL here to find out why it failed
if (result == TRUE) {
addresses = (NSArray*)CFHostGetAddressing(hostRef, &result);
}
}
if (result == TRUE) {
[addresses enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
NSString *strDNS = [NSString stringWithUTF8String:inet_ntoa(*((struct in_addr *)obj))];
NSLog(@"Resolved %d->%@", idx, strDNS);
}];
} else {
NSLog(@"Not resolved");
}
but this is producing same IP for every host Resolved 0-220.120.64.1 any help??
