b3060bfbd0
* Fix golangci-lint errors Signed-off-by: z1cheng <imchench@gmail.com> * Fix dupl errors Signed-off-by: z1cheng <imchench@gmail.com> * Fix comments Signed-off-by: z1cheng <imchench@gmail.com> * Fix errcheck lint errors Signed-off-by: z1cheng <imchench@gmail.com> * Fix assert in e2e test Signed-off-by: z1cheng <imchench@gmail.com> * Not interrupt the waitForPodsReady Signed-off-by: z1cheng <imchench@gmail.com> * Replace string with constant Signed-off-by: z1cheng <imchench@gmail.com> * Fix comments Signed-off-by: z1cheng <imchench@gmail.com> * Revert write file permision Signed-off-by: z1cheng <imchench@gmail.com> --------- Signed-off-by: z1cheng <imchench@gmail.com>
65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package net
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import (
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"fmt"
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_net "net"
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"os/exec"
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)
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// IsIPV6 checks if the input contains a valid IPV6 address
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func IsIPV6(ip _net.IP) bool {
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return ip != nil && ip.To4() == nil
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}
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// IsPortAvailable checks if a TCP port is available or not
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func IsPortAvailable(p int) bool {
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ln, err := _net.Listen("tcp", fmt.Sprintf(":%v", p))
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defer func() {
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if ln != nil {
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ln.Close()
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}
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}()
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return err == nil
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}
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// IsIPv6Enabled checks if IPV6 is enabled or not and we have
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// at least one configured in the pod
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func IsIPv6Enabled() bool {
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cmd := exec.Command("test", "-f", "/proc/net/if_inet6")
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if cmd.Run() != nil {
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return false
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}
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addrs, err := _net.InterfaceAddrs()
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if err != nil {
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return false
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}
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for _, addr := range addrs {
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ip, _, err := _net.ParseCIDR(addr.String())
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if err != nil {
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return false
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}
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if IsIPV6(ip) {
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return true
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}
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}
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return false
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}
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