mirror of
https://github.com/Luzifer/ansible-role-version.git
synced 2024-12-23 11:01:20 +00:00
63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package icmp_test
|
|
|
|
import (
|
|
"log"
|
|
"net"
|
|
"os"
|
|
"runtime"
|
|
|
|
"golang.org/x/net/icmp"
|
|
"golang.org/x/net/ipv6"
|
|
)
|
|
|
|
func ExamplePacketConn_nonPrivilegedPing() {
|
|
switch runtime.GOOS {
|
|
case "darwin":
|
|
case "linux":
|
|
log.Println("you may need to adjust the net.ipv4.ping_group_range kernel state")
|
|
default:
|
|
log.Println("not supported on", runtime.GOOS)
|
|
return
|
|
}
|
|
|
|
c, err := icmp.ListenPacket("udp6", "fe80::1%en0")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
defer c.Close()
|
|
|
|
wm := icmp.Message{
|
|
Type: ipv6.ICMPTypeEchoRequest, Code: 0,
|
|
Body: &icmp.Echo{
|
|
ID: os.Getpid() & 0xffff, Seq: 1,
|
|
Data: []byte("HELLO-R-U-THERE"),
|
|
},
|
|
}
|
|
wb, err := wm.Marshal(nil)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if _, err := c.WriteTo(wb, &net.UDPAddr{IP: net.ParseIP("ff02::1"), Zone: "en0"}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
rb := make([]byte, 1500)
|
|
n, peer, err := c.ReadFrom(rb)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
rm, err := icmp.ParseMessage(58, rb[:n])
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
switch rm.Type {
|
|
case ipv6.ICMPTypeEchoReply:
|
|
log.Printf("got reflection from %v", peer)
|
|
default:
|
|
log.Printf("got %+v; want echo reply", rm)
|
|
}
|
|
}
|