GetValidationContext().
		GetTrustedCa().
		GetInlineBytes()

	// seems as though the most straightforward way to tell whether this is a root ca or not
	// is to check whether the inline bytes of the cert chain or the trusted ca field is zero length
	if len(certChainSecret) > 0 {
		builder.Data(string(certChainSecret))
	} else if len(caDataSecret) > 0 {
		builder.Data(string(caDataSecret))
	}

	Certificates []*CertsDump                `json:"certificates"`
}

type CertsDump struct {
	Identity  string  `json:"identity"`
	State     string  `json:"state"`
	CertChain []*Cert `json:"cert_chain"`
}

type Cert struct {
	Pem            string `json:"pem"`
	SerialNumber   string `json:"serial_number"`
	ValidFrom      string `json:"valid_from"`
	ExpirationTime string `json:"expiration_time"`

                  }
                }
              ],
              "traffic_direction": "INBOUND",
              "internal_listener": {},
              "filter_chain_matcher": {
                "matcher_tree": {
                  "input": {
                    "name": "ip",
                    "typed_config": {

    - it will generate an iptables-save config, based on annotations/labels and other settings, and apply it.

### CmdAdd Sidecar Workflow

`CmdAdd` is triggered when there is a new pod created. This runs on the node, in a chain of CNI plugins - Istio is
run after the main CNI sets up the pod IP and networking.

1. Check k8s pod namespace against exclusion list (plugin config)

                        Valid Options: LISTENER, FILTER_CHAIN, NETWORK_FILTER, HTTP_FILTER, ROUTE_CONFIGURATION, VIRTUAL_HOST, HTTP_ROUTE, CLUSTER, EXTENSION_CONFIG, BOOTSTRAP, LISTENER_FILTER
                      enum:
                      - INVALID
                      - LISTENER
                      - FILTER_CHAIN
                      - NETWORK_FILTER
                      - HTTP_FILTER

                  }
                }
              ],
              "traffic_direction": "INBOUND",
              "internal_listener": {},
              "filter_chain_matcher": {
                "matcher_tree": {
                  "input": {
                    "name": "ip",
                    "typed_config": {

			// print the rest of the cert chain
			for _, ca := range secret.CertChain {
				n := new(big.Int)
				n, _ = n.SetString(ca.SerialNumber, 10)
				fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%x\t%v\t%v\n",
					secret.Identity, "Cert Chain", secret.State, certNotExpired(ca), n, valueOrNA(ca.ExpirationTime), valueOrNA(ca.ValidFrom))
			}
		}
	}
	return w.Flush()

         }
        }
       ],
       "listener_filters_timeout": "0s",
       "traffic_direction": "OUTBOUND",
       "continue_on_listener_filters_timeout": true,
       "default_filter_chain": {
        "filter_chain_match": {},
        "filters": [
         {
          "name": "istio.stats",
          "typed_config": {
           "@type": "type.googleapis.com/stats.PluginConfig"
          }
         },

	mux.HandleFunc(pconstants.CNIAddEventPath, s.handleAddEvent)
	return s
}

func (s *CniPluginServer) Stop() {
	s.cniListenServerCancel()
}

// Start starts up a UDS server which receives events from the CNI chain plugin.
func (s *CniPluginServer) Start() error {
	if s.sockAddress == "" {
		return fmt.Errorf("no socket address provided")
	}
	log.Info("Start a listen server for CNI plugin events")

	CertDir string

	// Timeout is how long to wait before giving up on XDS
	Timeout time.Duration

	// InsecureSkipVerify skips client verification the server's certificate chain and host name.
	InsecureSkipVerify bool

	// XDSSAN is the expected Subject Alternative Name of the XDS server
	XDSSAN string

	// Plaintext forces plain text communication (for talking to port 15010)
	Plaintext bool