mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
/*
|
|
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"
|
|
"net"
|
|
"strconv"
|
|
|
|
"k8s.io/klog/v2"
|
|
)
|
|
|
|
// IPPart returns just the IP part of an IP or IP:port or endpoint string. If the IP
|
|
// part is an IPv6 address enclosed in brackets (e.g. "[fd00:1::5]:9999"),
|
|
// then the brackets are stripped as well.
|
|
func IPPart(s string) string {
|
|
if ip := net.ParseIP(s); ip != nil {
|
|
// IP address without port
|
|
return s
|
|
}
|
|
// Must be IP:port
|
|
host, _, err := net.SplitHostPort(s)
|
|
if err != nil {
|
|
klog.Errorf("Error parsing '%s': %v", s, err)
|
|
return ""
|
|
}
|
|
// Check if host string is a valid IP address
|
|
ip := net.ParseIP(host)
|
|
if ip == nil {
|
|
klog.Errorf("invalid IP part '%s'", host)
|
|
return ""
|
|
}
|
|
return ip.String()
|
|
}
|
|
|
|
// PortPart returns just the port part of an endpoint string.
|
|
func PortPart(s string) (int, error) {
|
|
// Must be IP:port
|
|
_, port, err := net.SplitHostPort(s)
|
|
if err != nil {
|
|
klog.Errorf("Error parsing '%s': %v", s, err)
|
|
return -1, err
|
|
}
|
|
portNumber, err := strconv.Atoi(port)
|
|
if err != nil {
|
|
klog.Errorf("Error parsing '%s': %v", port, err)
|
|
return -1, err
|
|
}
|
|
return portNumber, nil
|
|
}
|
|
|
|
// ToCIDR returns a host address of the form <ip-address>/32 for
|
|
// IPv4 and <ip-address>/128 for IPv6
|
|
func ToCIDR(ip net.IP) string {
|
|
len := 32
|
|
if ip.To4() == nil {
|
|
len = 128
|
|
}
|
|
return fmt.Sprintf("%s/%d", ip.String(), len)
|
|
}
|