1 files changed, 56 insertions, 0 deletions
diff --git a/pkg/k8s.io/apimachinery/pkg/util/net/util.go b/pkg/k8s.io/apimachinery/pkg/util/net/util.go
new file mode 100644
index 000000000..5950087e0
--- /dev/null
+++ b/pkg/k8s.io/apimachinery/pkg/util/net/util.go
@@ -0,0 +1,56 @@
+/*
+Copyright 2016 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 net
+
+import (
+	"errors"
+	"net"
+	"reflect"
+	"syscall"
+)
+
+// IPNetEqual checks if the two input IPNets are representing the same subnet.
+// For example,
+//	10.0.0.1/24 and 10.0.0.0/24 are the same subnet.
+//	10.0.0.1/24 and 10.0.0.0/25 are not the same subnet.
+func IPNetEqual(ipnet1, ipnet2 *net.IPNet) bool {
+	if ipnet1 == nil || ipnet2 == nil {
+		return false
+	}
+	if reflect.DeepEqual(ipnet1.Mask, ipnet2.Mask) && ipnet1.Contains(ipnet2.IP) && ipnet2.Contains(ipnet1.IP) {
+		return true
+	}
+	return false
+}
+
+// Returns if the given err is "connection reset by peer" error.
+func IsConnectionReset(err error) bool {
+	var errno syscall.Errno
+	if errors.As(err, &errno) {
+		return errno == syscall.ECONNRESET
+	}
+	return false
+}
+
+// Returns if the given err is "connection refused" error
+func IsConnectionRefused(err error) bool {
+	var errno syscall.Errno
+	if errors.As(err, &errno) {
+		return errno == syscall.ECONNREFUSED
+	}
+	return false
+}