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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"
"fmt"
"net"
"runtime"
"strings"
"sync"
"testing"
"golang.org/x/net/internal/iana"
"golang.org/x/net/ipv6"
"golang.org/x/net/nettest"
)
func BenchmarkReadWriteUnicast(b *testing.B) {
switch runtime.GOOS {
case "fuchsia", "hurd", "js", "nacl", "plan9", "windows":
b.Skipf("not supported on %s", runtime.GOOS)
}
c, err := nettest.NewLocalPacketListener("udp6")
if err != nil {
b.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
dst := c.LocalAddr()
wb, rb := []byte("HELLO-R-U-THERE"), make([]byte, 128)
b.Run("NetUDP", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := c.WriteTo(wb, dst); err != nil {
b.Fatal(err)
}
if _, _, err := c.ReadFrom(rb); err != nil {
b.Fatal(err)
}
}
})
b.Run("IPv6UDP", func(b *testing.B) {
p := ipv6.NewPacketConn(c)
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
if err := p.SetControlMessage(cf, true); err != nil {
b.Fatal(err)
}
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
HopLimit: 1,
}
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
if ifi != nil {
cm.IfIndex = ifi.Index
}
for i := 0; i < b.N; i++ {
if _, err := p.WriteTo(wb, &cm, dst); err != nil {
b.Fatal(err)
}
if _, _, _, err := p.ReadFrom(rb); err != nil {
b.Fatal(err)
}
}
})
}
func BenchmarkPacketConnReadWriteUnicast(b *testing.B) {
switch runtime.GOOS {
case "fuchsia", "hurd", "js", "nacl", "plan9", "windows":
b.Skipf("not supported on %s", runtime.GOOS)
}
payload := []byte("HELLO-R-U-THERE")
iph := []byte{
0x69, 0x8b, 0xee, 0xf1, 0xca, 0xfe, 0xff, 0x01,
0x20, 0x01, 0x0d, 0xb8, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x20, 0x01, 0x0d, 0xb8, 0x00, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
}
greh := []byte{0x00, 0x00, 0x86, 0xdd, 0x00, 0x00, 0x00, 0x00}
datagram := append(greh, append(iph, payload...)...)
bb := make([]byte, 128)
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
HopLimit: 1,
Src: net.IPv6loopback,
}
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
if ifi != nil {
cm.IfIndex = ifi.Index
}
b.Run("UDP", func(b *testing.B) {
c, err := nettest.NewLocalPacketListener("udp6")
if err != nil {
b.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
dst := c.LocalAddr()
cf := ipv6.FlagHopLimit | ipv6.FlagInterface
if err := p.SetControlMessage(cf, true); err != nil {
b.Fatal(err)
}
wms := []ipv6.Message{
{
Buffers: [][]byte{payload},
Addr: dst,
OOB: cm.Marshal(),
},
}
rms := []ipv6.Message{
{
Buffers: [][]byte{bb},
OOB: ipv6.NewControlMessage(cf),
},
}
b.Run("Net", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := c.WriteTo(payload, dst); err != nil {
b.Fatal(err)
}
if _, _, err := c.ReadFrom(bb); err != nil {
b.Fatal(err)
}
}
})
b.Run("ToFrom", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := p.WriteTo(payload, &cm, dst); err != nil {
b.Fatal(err)
}
if _, _, _, err := p.ReadFrom(bb); err != nil {
b.Fatal(err)
}
}
})
b.Run("Batch", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := p.WriteBatch(wms, 0); err != nil {
b.Fatal(err)
}
if _, err := p.ReadBatch(rms, 0); err != nil {
b.Fatal(err)
}
}
})
})
b.Run("IP", func(b *testing.B) {
switch runtime.GOOS {
case "netbsd":
b.Skip("need to configure gre on netbsd")
case "openbsd":
b.Skip("net.inet.gre.allow=0 by default on openbsd")
}
c, err := net.ListenPacket(fmt.Sprintf("ip6:%d", iana.ProtocolGRE), "::1")
if err != nil {
b.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
dst := c.LocalAddr()
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
if err := p.SetControlMessage(cf, true); err != nil {
b.Fatal(err)
}
wms := []ipv6.Message{
{
Buffers: [][]byte{datagram},
Addr: dst,
OOB: cm.Marshal(),
},
}
rms := []ipv6.Message{
{
Buffers: [][]byte{bb},
OOB: ipv6.NewControlMessage(cf),
},
}
b.Run("Net", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := c.WriteTo(datagram, dst); err != nil {
b.Fatal(err)
}
if _, _, err := c.ReadFrom(bb); err != nil {
b.Fatal(err)
}
}
})
b.Run("ToFrom", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := p.WriteTo(datagram, &cm, dst); err != nil {
b.Fatal(err)
}
if _, _, _, err := p.ReadFrom(bb); err != nil {
b.Fatal(err)
}
}
})
b.Run("Batch", func(b *testing.B) {
for i := 0; i < b.N; i++ {
if _, err := p.WriteBatch(wms, 0); err != nil {
b.Fatal(err)
}
if _, err := p.ReadBatch(rms, 0); err != nil {
b.Fatal(err)
}
}
})
})
}
func TestPacketConnConcurrentReadWriteUnicastUDP(t *testing.T) {
switch runtime.GOOS {
case "fuchsia", "hurd", "js", "nacl", "plan9", "windows":
t.Skipf("not supported on %s", runtime.GOOS)
}
if !nettest.SupportsIPv6() {
t.Skip("ipv6 is not supported")
}
c, err := nettest.NewLocalPacketListener("udp6")
if err != nil {
t.Fatal(err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
defer p.Close()
dst := c.LocalAddr()
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
wb := []byte("HELLO-R-U-THERE")
if err := p.SetControlMessage(cf, true); err != nil { // probe before test
if protocolNotSupported(err) {
t.Skipf("not supported on %s", runtime.GOOS)
}
t.Fatal(err)
}
var wg sync.WaitGroup
reader := func() {
defer wg.Done()
rb := make([]byte, 128)
if n, cm, _, err := p.ReadFrom(rb); err != nil {
t.Error(err)
return
} else if !bytes.Equal(rb[:n], wb) {
t.Errorf("got %v; want %v", rb[:n], wb)
return
} else {
s := cm.String()
if strings.Contains(s, ",") {
t.Errorf("should be space-separated values: %s", s)
}
}
}
writer := func(toggle bool) {
defer wg.Done()
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
Src: net.IPv6loopback,
}
if ifi != nil {
cm.IfIndex = ifi.Index
}
if err := p.SetControlMessage(cf, toggle); err != nil {
t.Error(err)
return
}
if n, err := p.WriteTo(wb, &cm, dst); err != nil {
t.Error(err)
return
} else if n != len(wb) {
t.Errorf("got %d; want %d", n, len(wb))
return
}
}
const N = 10
wg.Add(N)
for i := 0; i < N; i++ {
go reader()
}
wg.Add(2 * N)
for i := 0; i < 2*N; i++ {
go writer(i%2 != 0)
}
wg.Add(N)
for i := 0; i < N; i++ {
go reader()
}
wg.Wait()
}
func TestPacketConnConcurrentReadWriteUnicast(t *testing.T) {
switch runtime.GOOS {
case "fuchsia", "hurd", "js", "nacl", "plan9", "windows":
t.Skipf("not supported on %s", runtime.GOOS)
}
payload := []byte("HELLO-R-U-THERE")
iph := []byte{
0x69, 0x8b, 0xee, 0xf1, 0xca, 0xfe, 0xff, 0x01,
0x20, 0x01, 0x0d, 0xb8, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x20, 0x01, 0x0d, 0xb8, 0x00, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
}
greh := []byte{0x00, 0x00, 0x86, 0xdd, 0x00, 0x00, 0x00, 0x00}
datagram := append(greh, append(iph, payload...)...)
t.Run("UDP", func(t *testing.T) {
c, err := nettest.NewLocalPacketListener("udp6")
if err != nil {
t.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
t.Run("ToFrom", func(t *testing.T) {
testPacketConnConcurrentReadWriteUnicast(t, p, payload, c.LocalAddr(), false)
})
t.Run("Batch", func(t *testing.T) {
testPacketConnConcurrentReadWriteUnicast(t, p, payload, c.LocalAddr(), true)
})
})
t.Run("IP", func(t *testing.T) {
switch runtime.GOOS {
case "netbsd":
t.Skip("need to configure gre on netbsd")
case "openbsd":
t.Skip("net.inet.gre.allow=0 by default on openbsd")
}
c, err := net.ListenPacket(fmt.Sprintf("ip6:%d", iana.ProtocolGRE), "::1")
if err != nil {
t.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
}
defer c.Close()
p := ipv6.NewPacketConn(c)
t.Run("ToFrom", func(t *testing.T) {
testPacketConnConcurrentReadWriteUnicast(t, p, datagram, c.LocalAddr(), false)
})
t.Run("Batch", func(t *testing.T) {
testPacketConnConcurrentReadWriteUnicast(t, p, datagram, c.LocalAddr(), true)
})
})
}
func testPacketConnConcurrentReadWriteUnicast(t *testing.T, p *ipv6.PacketConn, data []byte, dst net.Addr, batch bool) {
ifi, _ := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
if err := p.SetControlMessage(cf, true); err != nil { // probe before test
if protocolNotSupported(err) {
t.Skipf("not supported on %s", runtime.GOOS)
}
t.Fatal(err)
}
var firstError sync.Once
fatalf := func(format string, args ...interface{}) {
// On the first error, close the PacketConn to unblock the remaining
// goroutines. Suppress any further errors, which may occur simply due to
// closing the PacketConn.
first := false
firstError.Do(func() {
first = true
p.Close()
})
if first {
t.Helper()
t.Errorf(format, args...)
}
runtime.Goexit()
}
var wg sync.WaitGroup
reader := func() {
defer wg.Done()
b := make([]byte, 128)
n, cm, _, err := p.ReadFrom(b)
if err != nil {
fatalf("%v", err)
}
if !bytes.Equal(b[:n], data) {
fatalf("got %#v; want %#v", b[:n], data)
}
s := cm.String()
if strings.Contains(s, ",") {
fatalf("should be space-separated values: %s", s)
}
}
batchReader := func() {
defer wg.Done()
ms := []ipv6.Message{
{
Buffers: [][]byte{make([]byte, 128)},
OOB: ipv6.NewControlMessage(cf),
},
}
n, err := p.ReadBatch(ms, 0)
if err != nil {
fatalf("%v", err)
}
if n != len(ms) {
fatalf("got %d; want %d", n, len(ms))
}
var cm ipv6.ControlMessage
if err := cm.Parse(ms[0].OOB[:ms[0].NN]); err != nil {
fatalf("%v", err)
}
b := ms[0].Buffers[0][:ms[0].N]
if !bytes.Equal(b, data) {
fatalf("got %#v; want %#v", b, data)
}
s := cm.String()
if strings.Contains(s, ",") {
fatalf("should be space-separated values: %s", s)
}
}
writer := func(toggle bool) {
defer wg.Done()
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
HopLimit: 1,
Src: net.IPv6loopback,
}
if ifi != nil {
cm.IfIndex = ifi.Index
}
if err := p.SetControlMessage(cf, toggle); err != nil {
fatalf("%v", err)
}
n, err := p.WriteTo(data, &cm, dst)
if err != nil {
fatalf("%v", err)
}
if n != len(data) {
fatalf("got %d; want %d", n, len(data))
}
}
batchWriter := func(toggle bool) {
defer wg.Done()
cm := ipv6.ControlMessage{
TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
HopLimit: 1,
Src: net.IPv6loopback,
}
if ifi != nil {
cm.IfIndex = ifi.Index
}
if err := p.SetControlMessage(cf, toggle); err != nil {
fatalf("%v", err)
}
ms := []ipv6.Message{
{
Buffers: [][]byte{data},
OOB: cm.Marshal(),
Addr: dst,
},
}
n, err := p.WriteBatch(ms, 0)
if err != nil {
fatalf("%v", err)
}
if n != len(ms) {
fatalf("got %d; want %d", n, len(ms))
}
if ms[0].N != len(data) {
fatalf("got %d; want %d", ms[0].N, len(data))
}
}
const N = 10
wg.Add(N)
for i := 0; i < N; i++ {
if batch {
go batchReader()
} else {
go reader()
}
}
wg.Add(2 * N)
for i := 0; i < 2*N; i++ {
if batch {
go batchWriter(i%2 != 0)
} else {
go writer(i%2 != 0)
}
}
wg.Add(N)
for i := 0; i < N; i++ {
if batch {
go batchReader()
} else {
go reader()
}
}
wg.Wait()
}