type: integer
                        type:
                          description: Match on a specific ICMP type.  For example
                            a value of 8 refers to ICMP Echo Request (i.e. pings).
                          type: integer
                      type: object
                    ipVersion:
                      description: IPVersion is an optional field that restricts the

	var p [8]byte
	for {
		if _, err := rand.Read(p[:]); err != nil {
			return err
		}
		cc.mu.Lock()
		// check for dup before insert
		if _, found := cc.pings[p]; !found {
			cc.pings[p] = c
			cc.mu.Unlock()
			break
		}
		cc.mu.Unlock()
	}
	var pingError error
	errc := make(chan struct{})
	go func() {
		cc.t.markNewGoroutine()

- Enable SPDY pings to keep connections alive, so that `kubectl exec` and `kubectl portforward` won't be interrupted. ([#97083](https://github.com/kubernetes/kubernetes/pull/97083), [@knight42](https://github.com/knight42)) [SIG API Machinery and CLI]