handlerlogin: use std::atomic for counter and lockguard in ban check

handlers/handlerlogin.cpp

@@ -18,12 +18,15 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
+#include <atomic>
+#include <mutex>
 #include <openssl/evp.h>
 #include "handlerlogin.h"
 #include "../logger.h"
 struct LoginFail
 {
-	unsigned int count;
+	std::mutex mutex;
+	std::atomic<unsigned int> count;
 	time_t lastfail;
 };
 static std::map<std::string, LoginFail> loginFails;
@@ -34,6 +37,7 @@ bool HandlerLogin::isBanned(std::string ip)
 	if(utils::hasKey(loginFails, ip))
 	{
 		LoginFail &fl = loginFails[ip];
+		std::lock_guard<std::mutex> lock(fl.mutex);
 		return fl.count > 5 && (time(nullptr) - fl.lastfail) < 1200;
 	}
 	return false;