- (void)startTunnelWithOptions:(NSDictionary *)options completionHandler:(void (^)(BOOL * error))completionHandler {


vpnAdapter = [[OpenAdapter alloc] init];
vpnAdapter.delegate = self;

// get config

config = [[NSDictionary alloc] init];

NETunnelProviderProtocol *protocol = (NETunnelProviderProtocol *)self.protocolConfiguration;
config = protocol.providerConfiguration;

host = config[@"server"];

// Load config data
username = config[@"username"];
password = config[@"password"];


if(option != nil){
    [vpnAdapter connect:host user:username pass:password add:YES completionHandler:^(BOOL success){
       // return success;
        completionHandler(&success); // Thread 2: EXC_BAD_ACCESS (code=1, address=0xbcc68f020)
    }];

}else{
    [vpnAdapter connect:host user:username pass:password add:NO completionHandler:^(BOOL success){

        completionHandler(&success);

    }];
}

- (void)connect: (NSString *) host user:(NSString *)username pass:(NSString *) password add:(Boolean) isAdd completionHandler:(void (^)(BOOL success)) completionHandler{

dispatch_queue_attr_t attributes = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL, QOS_CLASS_UTILITY, 0);
dispatch_queue_t connectQueue = dispatch_queue_create("me.ss-abramchuk.open-adapter.connection", attributes);
dispatch_async(connectQueue, ^{
    // Call connect
    //int ret=1;
    NSArray* options = [NSArray arrayWithObjects:
                        @"--user", username,
                        host,
                        nil];

    if(isAdd){
        options = [NSArray arrayWithObjects:
                   @"--user", username,
                   @"--protocol", @"ad",
                   host,
                   nil];
    }
    //NSArray *paths = NSSearchPathForDirectoriesInDomains
    (NSDocumentDirectory, NSUserDomainMask, YES);
    //NSString *documentsDirectory = [paths objectAtIndex:0];

    NSMutableArray *arguments = [NSMutableArray arrayWithCapacity:1+[options count]];
    [arguments addObject:@"connect"];
    [arguments addObjectsFromArray:options];

    int argc = [arguments count];
    char **argv = (char **)malloc(sizeof(char*) * (argc + 1));

    [arguments enumerateObjectsUsingBlock:^(NSString *option, NSUInteger i, BOOL *stop) {
        const char * c_string = [option UTF8String];
        int length = (int)strlen(c_string);
        char *c_string_copy = (char *) malloc(sizeof(char) * (length + 1));
        strcpy(c_string_copy, c_string);
        argv[i] = c_string_copy;
    }];
    argv[argc] = NULL;
    const char *cfPass=[password UTF8String];
    int ret = self.vpnClient->start2connect(argc, argv, cfPass);
    BOOL result;
    if (ret!=0){
        result=false;
    }
    else {result = true;}
    completionHandler(result);
});