now := time.Now()
		if now.Sub(c.readSetAt) > updateInterval {
			c.Conn.SetReadDeadline(now.Add(c.readDeadline + updateInterval))
			c.readSetAt = now
		}
	}
}

func (c *DeadlineConn) setWriteDeadline() {
	if c.writeDeadline > 0 {
		now := time.Now()
		if now.Sub(c.writeSetAt) > updateInterval {
			c.Conn.SetWriteDeadline(now.Add(c.writeDeadline + updateInterval))
			c.writeSetAt = now
		}
	}
}