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// Copyright 2013 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 ipv6_test
import (
"bytes"
"errors"
"net"
"os"
"runtime"
"testing"
"time"
"golang.org/x/net/icmp"
"golang.org/x/net/internal/iana"
"golang.org/x/net/ipv6"
"golang.org/x/net/nettest"
)
func TestPacketConnReadWriteUnicastUDP(t *testing.T) {
switch runtime.GOOS {
case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1", "windows":
t.Skipf("not supported on %s", runtime.GOOS)
}
if _, err := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback); err != nil {
t.Skip("ipv6 is not enabled for loopback interface")
}
c, err := nettest.NewLocalPacketListener("udp6")
if err != nil {
t.Fatal(err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
defer p.Close()
dst := c.LocalAddr()
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
Src: net.IPv6loopback,
}
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
if ifi != nil {
cm.IfIndex = ifi.Index
}
wb := []byte("HELLO-R-U-THERE")
for i, toggle := range []bool{true, false, true} {
if err := p.SetControlMessage(cf, toggle); err != nil {
if protocolNotSupported(err) {
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
cm.HopLimit = i + 1
backoff := time.Millisecond
for {
n, err := p.WriteTo(wb, &cm, dst)
if err != nil {
if n == 0 && isENOBUFS(err) {
time.Sleep(backoff)
backoff *= 2
continue
}
t.Fatal(err)
}
if n != len(wb) {
t.Fatalf("got %d; want %d", n, len(wb))
}
break
}
rb := make([]byte, 128)
if n, _, _, err := p.ReadFrom(rb); err != nil {
t.Fatal(err)
} else if !bytes.Equal(rb[:n], wb) {
t.Fatalf("got %v; want %v", rb[:n], wb)
}
}
}
func TestPacketConnReadWriteUnicastICMP(t *testing.T) {
if !nettest.SupportsIPv6() {
t.Skip("ipv6 is not supported")
}
if !nettest.SupportsRawSocket() {
t.Skipf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH)
}
c, err := net.ListenPacket("ip6:ipv6-icmp", "::1")
if err != nil {
t.Fatal(err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
defer p.Close()
dst, err := net.ResolveIPAddr("ip6", "::1")
if err != nil {
t.Fatal(err)
}
pshicmp := icmp.IPv6PseudoHeader(c.LocalAddr().(*net.IPAddr).IP, dst.IP)
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
Src: net.IPv6loopback,
}
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
if ifi != nil {
cm.IfIndex = ifi.Index
}
var f ipv6.ICMPFilter
f.SetAll(true)
f.Accept(ipv6.ICMPTypeEchoReply)
if err := p.SetICMPFilter(&f); errors.Is(err, ipv6.ErrNotImplemented) {
t.Skipf("setting ICMP filter not supported: %v", err)
} else if err != nil {
t.Fatal(err)
}
var psh []byte
for i, toggle := range []bool{true, false, true} {
if toggle {
psh = nil
if err := p.SetChecksum(true, 2); err != nil {
// AIX, Illumos and Solaris never allow
// modification of ICMP properties.
switch runtime.GOOS {
case "aix", "illumos", "solaris":
default:
t.Fatal(err)
}
}
} else {
psh = pshicmp
// Some platforms never allow to disable the
// kernel checksum processing.
p.SetChecksum(false, -1)
}
wb, err := (&icmp.Message{
Type: ipv6.ICMPTypeEchoRequest, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal(psh)
if err != nil {
t.Fatal(err)
}
if err := p.SetControlMessage(cf, toggle); err != nil {
if protocolNotSupported(err) {
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
cm.HopLimit = i + 1
backoff := time.Millisecond
for {
n, err := p.WriteTo(wb, &cm, dst)
if err != nil {
if n == 0 && isENOBUFS(err) {
time.Sleep(backoff)
backoff *= 2
continue
}
t.Fatal(err)
}
if n != len(wb) {
t.Fatalf("got %d; want %d", n, len(wb))
}
break
}
rb := make([]byte, 128)
if n, _, _, err := p.ReadFrom(rb); err != nil {
t.Fatal(err)
} else {
if m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n]); err != nil {
t.Fatal(err)
} else if m.Type != ipv6.ICMPTypeEchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv6.ICMPTypeEchoReply, 0)
}
}
}
}
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