You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: conn_ping.go
    path of file: ./repos/clickhouse-go
    
    the code of the file until where you have to start completion: // Licensed to ClickHouse, Inc. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. ClickHouse, Inc. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either expre
    
func (c *connect) ping(ctx context.Context) (err error) {
	// set a read deadline - alternative to context.Read operation will fail if no data is received after deadline.
	c.conn.SetReadDeadline(time.Now().Add(c.readTimeout))
	defer c.conn.SetReadDeadline(time.Time{})
	// context level deadlines override any read deadline
	if deadline, ok := ctx.Deadline(); ok {
		c.conn.SetDeadline(deadline)
		defer c.conn.SetDeadline(time.Time{})
	}
	c.debugf("[ping] -> ping")
	c.buffer.PutByte(proto.ClientPing)
	if err := c.flush(); err != nil {
		return err
	}

	var packet byte
	for {
		if packet, err = c.reader.ReadByte(); err != nil {
			return err
		}
		switch packet {
		case proto.ServerException:
			return c.exception()
		case proto.ServerProgress:
			if _, err = c.progress(); err != nil {
				return err
			}
		case proto.ServerPong:
			c.debugf("[ping] <- pong")
			return nil
		default:
			return fmt.Errorf("unexpected packet %d", packet)
		}
	}
}