140 lines
3 KiB
Go
140 lines
3 KiB
Go
// Copyright 2012 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 ipv4_test
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import (
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"bytes"
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"net"
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"runtime"
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"strings"
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"sync"
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"testing"
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"golang.org/x/net/internal/nettest"
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"golang.org/x/net/ipv4"
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)
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func BenchmarkReadWriteUnicast(b *testing.B) {
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c, err := nettest.NewLocalPacketListener("udp4")
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if err != nil {
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b.Skipf("not supported on %s/%s: %v", runtime.GOOS, runtime.GOARCH, err)
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}
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defer c.Close()
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dst := c.LocalAddr()
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wb, rb := []byte("HELLO-R-U-THERE"), make([]byte, 128)
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b.Run("NetUDP", func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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if _, err := c.WriteTo(wb, dst); err != nil {
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b.Fatal(err)
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}
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if _, _, err := c.ReadFrom(rb); err != nil {
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b.Fatal(err)
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}
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}
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})
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b.Run("IPv4UDP", func(b *testing.B) {
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p := ipv4.NewPacketConn(c)
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cf := ipv4.FlagTTL | ipv4.FlagInterface
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if err := p.SetControlMessage(cf, true); err != nil {
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b.Fatal(err)
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}
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cm := ipv4.ControlMessage{TTL: 1}
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ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
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if ifi != nil {
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cm.IfIndex = ifi.Index
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}
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for i := 0; i < b.N; i++ {
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if _, err := p.WriteTo(wb, &cm, dst); err != nil {
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b.Fatal(err)
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}
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if _, _, _, err := p.ReadFrom(rb); err != nil {
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b.Fatal(err)
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}
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}
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})
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}
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func TestPacketConnConcurrentReadWriteUnicastUDP(t *testing.T) {
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switch runtime.GOOS {
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case "nacl", "plan9", "windows":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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c, err := nettest.NewLocalPacketListener("udp4")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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p := ipv4.NewPacketConn(c)
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defer p.Close()
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dst := c.LocalAddr()
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ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
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cf := ipv4.FlagTTL | ipv4.FlagSrc | ipv4.FlagDst | ipv4.FlagInterface
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wb := []byte("HELLO-R-U-THERE")
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if err := p.SetControlMessage(cf, true); err != nil { // probe before test
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if nettest.ProtocolNotSupported(err) {
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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t.Fatal(err)
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}
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var wg sync.WaitGroup
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reader := func() {
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defer wg.Done()
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rb := make([]byte, 128)
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if n, cm, _, err := p.ReadFrom(rb); err != nil {
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t.Error(err)
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return
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} else if !bytes.Equal(rb[:n], wb) {
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t.Errorf("got %v; want %v", rb[:n], wb)
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return
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} else {
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s := cm.String()
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if strings.Contains(s, ",") {
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t.Errorf("should be space-separated values: %s", s)
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}
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}
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}
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writer := func(toggle bool) {
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defer wg.Done()
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cm := ipv4.ControlMessage{
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Src: net.IPv4(127, 0, 0, 1),
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}
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if ifi != nil {
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cm.IfIndex = ifi.Index
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}
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if err := p.SetControlMessage(cf, toggle); err != nil {
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t.Error(err)
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return
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}
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if n, err := p.WriteTo(wb, &cm, dst); err != nil {
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t.Error(err)
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return
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} else if n != len(wb) {
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t.Errorf("got %d; want %d", n, len(wb))
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return
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}
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}
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const N = 10
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wg.Add(N)
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for i := 0; i < N; i++ {
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go reader()
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}
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wg.Add(2 * N)
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for i := 0; i < 2*N; i++ {
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go writer(i%2 != 0)
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}
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wg.Add(N)
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for i := 0; i < N; i++ {
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go reader()
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}
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wg.Wait()
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}
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