Vendor dependencies with dep

vendor/golang.org/x/net/ipv4/readwrite_test.go

@@ -0,0 +1,140 @@
+// Copyright 2012 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 ipv4_test
+
+import (
+	"bytes"
+	"net"
+	"runtime"
+	"strings"
+	"sync"
+	"testing"
+
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv4"
+)
+
+func BenchmarkReadWriteUnicast(b *testing.B) {
+	c, err := nettest.NewLocalPacketListener("udp4")
+	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("IPv4UDP", func(b *testing.B) {
+		p := ipv4.NewPacketConn(c)
+		cf := ipv4.FlagTTL | ipv4.FlagInterface
+		if err := p.SetControlMessage(cf, true); err != nil {
+			b.Fatal(err)
+		}
+		cm := ipv4.ControlMessage{TTL: 1}
+		ifi := nettest.RoutedInterface("ip4", 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 TestPacketConnConcurrentReadWriteUnicastUDP(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+
+	c, err := nettest.NewLocalPacketListener("udp4")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv4.NewPacketConn(c)
+	defer p.Close()
+
+	dst := c.LocalAddr()
+	ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
+	cf := ipv4.FlagTTL | ipv4.FlagSrc | ipv4.FlagDst | ipv4.FlagInterface
+	wb := []byte("HELLO-R-U-THERE")
+
+	if err := p.SetControlMessage(cf, true); err != nil { // probe before test
+		if nettest.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 := ipv4.ControlMessage{
+			Src: net.IPv4(127, 0, 0, 1),
+		}
+		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()
+}