public function acceptConnection($socket)
    {
        // Accept a connection on server socket.
        set_error_handler(function(){});
        $new_socket = stream_socket_accept($socket, 0, $remote_address);
        restore_error_handler();

        // Thundering herd.
        if (!$new_socket) {
            return;
        }

        // TcpConnection.
        $connection                         = new TcpConnection($new_socket, $remote_address);
        $this->connections[$connection->id] = $connection;
        $connection->worker                 = $this;
        $connection->protocol               = $this->protocol;
        $connection->transport              = $this->transport;
        $connection->onMessage              = $this->onMessage;
        $connection->onClose                = $this->onClose;
        $connection->onError                = $this->onError;
        $connection->onBufferDrain          = $this->onBufferDrain;
        $connection->onBufferFull           = $this->onBufferFull;

        // Try to emit onConnect callback.
        if ($this->onConnect) {
            try {
                call_user_func($this->onConnect, $connection);
            } catch (\Exception $e) {
                static::log($e);
                exit(250);
            } catch (\Error $e) {
                static::log($e);
                exit(250);
            }
        }
    }