// Enable TCP quick ACK, John Nagle says
			// "Set TCP_QUICKACK. If you find a case where that makes things worse, let me know."
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, unix.TCP_QUICKACK, 1)

			// The time (in seconds) the connection needs to remain idle before
			// TCP starts sending keepalive probes
			_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, 15)

httpbin            httpbin-65975d4c6f-jr69n                             10.244.1.10 ambient-worker        None                                TCP
istio-system       istiod-8c7b98fc4-mwjfp                               10.244.2.49 ambient-worker2       None                                TCP

    )

    taskFaker.advanceUntil(520.ms)
    assertEvents(
      "plan 1 TCP connect failed",
    )

    taskFaker.advanceUntil(530.ms)
    assertEvents(
      "plan 2 TCP connect failed",
      "take plan 3",
      "plan 3 TCP connecting...",
    )

    taskFaker.advanceUntil(780.ms)
    assertEvents(
      "take plan 4",
      "plan 4 TCP connecting...",
    )

	// CLI: -t mangle -A ISTIO_PRERT -s 169.254.7.127 -p tcp -m tcp --dport <PROBEPORT> -j ACCEPT
	//
	// DESC: If this is one of our node-probe ports and is from our SNAT-ed/"special" hostside IP, short-circuit out here
	iptablesBuilder.AppendRule(iptableslog.UndefinedCommand, ChainInpodPrerouting, iptablesconstants.MANGLE,
		"-s", hostProbeSNAT.String(),
		"-p", "tcp",
		"-m", "tcp",
		"-j", "ACCEPT",
	)

iptables -t nat -A ISTIO_OUTPUT -d e9ac:1e77:90ca:399f:4d6d:ece2:2f9b:3164 -p tcp -m tcp -j ACCEPT
iptables -t mangle -A ISTIO_PRERT ! -d 127.0.0.1/32 -p tcp -i lo -j ACCEPT
iptables -t mangle -A ISTIO_PRERT -p tcp -m tcp --dport 15008 -m mark ! --mark 0x539/0xfff -j TPROXY --on-port 15008 --tproxy-mark 0x111/0xfff
iptables -t mangle -A ISTIO_PRERT -p tcp -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

  {{- end }}
  namespace: {{ .Release.Namespace }}
spec:
  ports:
  - port: 15012
    name: tcp-istiod
    protocol: TCP
  - port: 443
    targetPort: 15017
    name: tcp-webhook
    protocol: TCP
  {{- if not (regexMatch "^([0-9]*\\.){3}[0-9]*$" .Values.global.remotePilotAddress) }}
  # if the remotePilotAddress is not an IP addr, we use ExternalName

      80: 8080
    "default/example2.com":
      80: 8080
# Define another local address, but this one uses TCP. This allows testing HBONE and TCP with one config.
- uid: cluster1//v1/Pod/default/local-tcp
  name: local-tcp
  namespace: default
  serviceAccount: default
  workloadIps: ["127.0.0.2"]
  protocol: TCP
  node: local
  network: ""
  services:
    "default/example.com":
      80: 8080
    "default/example2.com":

type httpListener struct {
	opts         TCPOptions
	tcpListeners []*net.TCPListener // underlying TCP listeners.
	acceptCh     chan acceptResult  // channel where all TCP listeners write accepted connection.
	ctx          context.Context
	ctxCanceler  context.CancelFunc
}

// start - starts separate goroutine for each TCP listener.  A valid new connection is passed to httpListener.acceptCh.
func (listener *httpListener) start() {

  {{- end }}
  namespace: {{ .Release.Namespace }}
subsets:
- addresses:
  - ip: {{ .Values.global.remotePilotAddress }}
  ports:
  - port: 15012
    name: tcp-istiod
    protocol: TCP
  - port: 15017
    name: tcp-webhook
    protocol: TCP
---

    - port: 15010
      name: grpc-xds # plaintext
      protocol: TCP
    - port: 15012
      name: https-dns # mTLS with k8s-signed cert
      protocol: TCP
    - port: 443
      name: https-webhook # validation and injection
      targetPort: 15017
      protocol: TCP
    - port: 15014
      name: http-monitoring # prometheus stats
      protocol: TCP
  selector:
    app: istiod
    {{- if ne .Values.revision "" }}