## Other Reference

The framework for this implementation of the CNI plugin is based on the
[containernetworking sample plugin](https://github.com/containernetworking/plugins/tree/main/plugins/sample)

The details for the deployment & installation of this plugin were pretty much lifted directly from the
[Calico CNI plugin](https://github.com/projectcalico/cni-plugin).

Specifically:

		}

		for i, rawPlugin := range plugins {
			plugin, err := util.GetPlugin(rawPlugin)
			if err != nil {
				return nil, fmt.Errorf("existing CNI plugin: %v", err)
			}
			if plugin["type"] == "istio-cni" {
				plugins = append(plugins[:i], plugins[i+1:]...)
				break
			}
		}

		newMap["plugins"] = append(plugins, istioMap)
	}

	return util.MarshalCNIConfig(newMap)

		saNewFilename         string
	}{
		{
			name:                  "chained CNI plugin",
			chainedCNIPlugin:      true,
			cniConfigFilename:     "plugins.conflist",
			invalidConfigFilename: "list.conflist",
			validConfigFilename:   "list.conflist.golden",
			saFilename:            "token-foo",
		},
		{
			name:                "standalone CNI plugin",
			cniConfigFilename:   "istio-cni.conf",

// See the License for the specific language governing permissions and
// limitations under the License.

package repair

import (
	"fmt"
	"math"
	"net"
	"strconv"

	netns "github.com/containernetworking/plugins/pkg/ns"
	"github.com/prometheus/procfs"
	"github.com/vishvananda/netlink"
	"golang.org/x/sys/unix"
	corev1 "k8s.io/api/core/v1"

	"istio.io/istio/pkg/log"
)

func getPidNamespace(pid int) string {

// See the License for the specific language governing permissions and
// limitations under the License.

// This is a sample chained plugin that supports multiple CNI versions. It
// parses prevResult according to the cniVersion
package plugin

import (
	"fmt"

	"github.com/containernetworking/plugins/pkg/ns"

	"istio.io/istio/pkg/log"
	"istio.io/istio/tools/istio-iptables/pkg/cmd"
	"istio.io/istio/tools/istio-iptables/pkg/config"

// See the License for the specific language governing permissions and
// limitations under the License.

package nodeagent

import (
	"fmt"
	"runtime"
	"sync"

	netns "github.com/containernetworking/plugins/pkg/ns"
	"golang.org/x/sys/unix"
)

type NetnsWrapper struct {
	innerNetns netns.NetNS
	inode      uint64
}

func (n *NetnsWrapper) Inode() uint64 {
	return n.inode
}

		t.Fatal(err)
	}

	// Find Istio CNI and remove from plugin list
	plugins, err := util.GetPlugins(cniConfigMap)
	if err != nil {
		t.Fatal(err)
	}
	for i, rawPlugin := range plugins {
		plugin, err := util.GetPlugin(rawPlugin)
		if err != nil {
			t.Fatal(err)
		}
		if plugin["type"] == "istio-cni" {
			cniConfigMap["plugins"] = append(plugins[:i], plugins[i+1:]...)
			break
		}
	}

// - this is because during add specifically, if CNI plugins have not finished executing,
// K8S may get a pod Add event without any IPs in the object, and the pod will later be updated with IPs.
//
// We always need the IPs, but this is fine because this AddPodToMesh can be called from the CNI plugin as well,

  //
  // IfNeeded: the webhook will be called at least one additional time as part of the admission evaluation
  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note:

  //
  // IfNeeded: the webhook will be called at least one additional time as part of the admission evaluation
  // if the object being admitted is modified by other admission plugins after the initial webhook call.
  // Webhooks that specify this option *must* be idempotent, able to process objects they previously admitted.
  // Note: