*: initial update to kube 1.8

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

vendor/k8s.io/kubernetes/pkg/proxy/util/port.go

@@ -0,0 +1,64 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed 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 express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+)
+
+// LocalPort describes a port on specific IP address and protocol
+type LocalPort struct {
+	// Description is the identity message of a given local port.
+	Description string
+	// IP is the IP address part of a given local port.
+	// If this string is empty, the port binds to all local IP addresses.
+	IP string
+	// Port is the port part of a given local port.
+	Port int
+	// Protocol is the protocol part of a given local port.
+	// The value is assumed to be lower-case. For example, "udp" not "UDP", "tcp" not "TCP".
+	Protocol string
+}
+
+func (lp *LocalPort) String() string {
+	return fmt.Sprintf("%q (%s:%d/%s)", lp.Description, lp.IP, lp.Port, lp.Protocol)
+}
+
+// Closeable is an interface around closing an port.
+type Closeable interface {
+	Close() error
+}
+
+// PortOpener is an interface around port opening/closing.
+// Abstracted out for testing.
+type PortOpener interface {
+	OpenLocalPort(lp *LocalPort) (Closeable, error)
+}
+
+// RevertPorts is closing ports in replacementPortsMap but not in originalPortsMap. In other words, it only
+// closes the ports opened in this sync.
+func RevertPorts(replacementPortsMap, originalPortsMap map[LocalPort]Closeable) {
+	for k, v := range replacementPortsMap {
+		// Only close newly opened local ports - leave ones that were open before this update
+		if originalPortsMap[k] == nil {
+			glog.V(2).Infof("Closing local port %s", k.String())
+			v.Close()
+		}
+	}
+}