DNS 解析

domainNameResolve.swift

    override func viewDidLoad() {
        super.viewDidLoad()
        // Uncomment the following line to preserve selection between presentations.
        // self.clearsSelectionOnViewWillAppear = false
        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem

        let g = ESGlobal.sharedInstance()
        segmentedControl.selectedSegmentIndex = g.networkType()
        textView0.text = g.debugInfo().description


        // 发起域名解析请求
        //var variableSelf = self
        var clientContext = CFHostClientContext(version: 0, info: unsafeBitCast(self, UnsafeMutablePointer<Void>.self), retain: nil, release: nil, copyDescription: { (i: UnsafePointer<Void>) -> Unmanaged<CFString>! in
            let desc = UnsafePointer<ESNetworkTableViewController>(i).memory.description as CFString
            return Unmanaged<CFString>.passRetained(desc)
            //Unmanaged.passRetained(CFCopyDescription(Unmanaged.fromOpaque(COpaquePointer(i)).takeUnretainedValue()))
        })

        byod_showHUD("")

        var cfError = CFStreamError()
        let hostRef = CFHostCreateWithName(kCFAllocatorDefault, "mazutest.3g.qq.com").takeRetainedValue()
        CFHostSetClient(hostRef, { (host: CFHost, hostInfo: CFHostInfoType, error: UnsafePointer<CFStreamError>, info: UnsafeMutablePointer<Void>) in
            print("callback done"); print(host); print(hostInfo); print(error.memory); print(info)
            let vc = unsafeBitCast(info, ESNetworkTableViewController.self)// UnsafePointer<ESNetworkTableViewController>(info).memory
            vc.byod_hideHUD()

            var resolved: DarwinBoolean = false
            guard let arr = CFHostGetAddressing(host, &resolved)?.takeRetainedValue() where resolved else {
                return
            }
            let data = (arr as Array).first as! NSData
            var storage = sockaddr_storage()
            data.getBytes(&storage, length: sizeof(sockaddr_storage))
            if Int32(storage.ss_family) == AF_INET {
                let addr4 = withUnsafePointer(&storage) { UnsafePointer<sockaddr_in>($0).memory }
                let ipv4Address = String(CString: inet_ntoa(addr4.sin_addr), encoding: NSASCIIStringEncoding)
                print(ipv4Address)
                let inTestEnvironment = ipv4Address == IPv4AddressForNetwork.Test.rawValue
                vc.segmentedControl.setEnabled(!inTestEnvironment, forSegmentAtIndex: 1)
                vc.segmentedControl.setEnabled(inTestEnvironment, forSegmentAtIndex: 2)
            }
            }, &clientContext)
        CFHostScheduleWithRunLoop(hostRef, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode /* kCFRunLoopCommonModes */);
        CFHostStartInfoResolution(hostRef, CFHostInfoType.Addresses, &cfError)
    }


//#include <errno.h>
//#include <netdb.h>
//#include <sys/types.h>
//#include <sys/socket.h>
//#include <netinet/in.h>
//#include <arpa/inet.h>

//
//@implementation ESNetworkTableViewController
//
//- (void)viewDidLoad {
//    [super viewDidLoad];
//    CFStreamError err;
//
//    CFHostClientContext cfhostclientcontext;
//    cfhostclientcontext.version = 0;
//    cfhostclientcontext.retain = nil;
//    cfhostclientcontext.release = nil;
//    cfhostclientcontext.copyDescription = nil;
//    cfhostclientcontext.info = (__bridge void * _Nullable)(self);
//
//    [self byod_showHUD:@""];
//
//    CFHostRef hostRef = CFHostCreateWithName(kCFAllocatorDefault, CFSTR("mazutest.3g.qq.com"));
//    CFHostSetClient(hostRef, callBackFunction, &cfhostclientcontext);
//    CFHostScheduleWithRunLoop(hostRef, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
//    CFHostStartInfoResolution(hostRef, kCFHostAddresses, &err);
//}

//
//void callBackFunction(CFHostRef theHost, CFHostInfoType typeInfo, const CFStreamError * __nullable error, void * __nullable info) {
//    ESNetworkTableViewController *vc = (__bridge ESNetworkTableViewController *)(info);
//    [vc byod_hideHUD];
//
//    Boolean resolved = NO;
//    CFArrayRef arrRef = CFHostGetAddressing(theHost, &resolved);
//    if (!resolved) {
//        return;
//    }
//    CFDataRef dataRef = CFArrayGetValueAtIndex(arrRef, 0);
//    /*
//     struct sockaddr *sa = (struct sockaddr *)CFDataGetBytePtr(dataRef);
//     NSString *addr0 = @(sa->sa_data); // 空字符串
//     NSLog(@"addr0: %@", addr0);
//     */
//
//    struct sockaddr_in * remoteAddr = (struct sockaddr_in *)CFDataGetBytePtr(dataRef);
//    NSString *addr1 = @(inet_ntoa(remoteAddr->sin_addr)); // such as, 14.17.41.149
//
//    BOOL inTestEnv = [addr1 isEqualToString:kIPForTestNetwork];
//    [vc.segmentedControl setEnabled:!inTestEnv forSegmentAtIndex:1];
//    [vc.segmentedControl setEnabled:inTestEnv forSegmentAtIndex:2];
//}
//@end