if err != nil {
		return err
	}

	serverHello, ok := msg.(*serverHelloMsg)
	if !ok {
		c.sendAlert(alertUnexpectedMessage)
		return unexpectedMessageError(serverHello, msg)
	}

	if err := c.pickTLSVersion(serverHello); err != nil {
		return err
	}

	// If we are negotiating a protocol version that's lower than what we
	// support, check for the server downgrade canaries.
	// See RFC 8446, Section 4.1.3.