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