--- /dev/null
+// 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 (
+ "net"
+ "runtime"
+ "testing"
+
+ "golang.org/x/net/internal/iana"
+ "golang.org/x/net/internal/nettest"
+ "golang.org/x/net/ipv4"
+)
+
+func TestConnUnicastSocketOptions(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl", "plan9", "windows":
+ t.Skipf("not supported on %s", runtime.GOOS)
+ }
+ ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
+ if ifi == nil {
+ t.Skipf("not available on %s", runtime.GOOS)
+ }
+
+ ln, err := net.Listen("tcp4", "127.0.0.1:0")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer ln.Close()
+
+ errc := make(chan error, 1)
+ go func() {
+ c, err := ln.Accept()
+ if err != nil {
+ errc <- err
+ return
+ }
+ errc <- c.Close()
+ }()
+
+ c, err := net.Dial("tcp4", ln.Addr().String())
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+
+ testUnicastSocketOptions(t, ipv4.NewConn(c))
+
+ if err := <-errc; err != nil {
+ t.Errorf("server: %v", err)
+ }
+}
+
+var packetConnUnicastSocketOptionTests = []struct {
+ net, proto, addr string
+}{
+ {"udp4", "", "127.0.0.1:0"},
+ {"ip4", ":icmp", "127.0.0.1"},
+}
+
+func TestPacketConnUnicastSocketOptions(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl", "plan9", "windows":
+ t.Skipf("not supported on %s", runtime.GOOS)
+ }
+ ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
+ if ifi == nil {
+ t.Skipf("not available on %s", runtime.GOOS)
+ }
+
+ m, ok := nettest.SupportsRawIPSocket()
+ for _, tt := range packetConnUnicastSocketOptionTests {
+ if tt.net == "ip4" && !ok {
+ t.Log(m)
+ continue
+ }
+ c, err := net.ListenPacket(tt.net+tt.proto, tt.addr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+
+ testUnicastSocketOptions(t, ipv4.NewPacketConn(c))
+ }
+}
+
+func TestRawConnUnicastSocketOptions(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl", "plan9", "windows":
+ t.Skipf("not supported on %s", runtime.GOOS)
+ }
+ if m, ok := nettest.SupportsRawIPSocket(); !ok {
+ t.Skip(m)
+ }
+ ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
+ if ifi == nil {
+ t.Skipf("not available on %s", runtime.GOOS)
+ }
+
+ c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+
+ r, err := ipv4.NewRawConn(c)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ testUnicastSocketOptions(t, r)
+}
+
+type testIPv4UnicastConn interface {
+ TOS() (int, error)
+ SetTOS(int) error
+ TTL() (int, error)
+ SetTTL(int) error
+}
+
+func testUnicastSocketOptions(t *testing.T, c testIPv4UnicastConn) {
+ tos := iana.DiffServCS0 | iana.NotECNTransport
+ switch runtime.GOOS {
+ case "windows":
+ // IP_TOS option is supported on Windows 8 and beyond.
+ t.Skipf("not supported on %s", runtime.GOOS)
+ }
+
+ if err := c.SetTOS(tos); err != nil {
+ t.Fatal(err)
+ }
+ if v, err := c.TOS(); err != nil {
+ t.Fatal(err)
+ } else if v != tos {
+ t.Fatalf("got %v; want %v", v, tos)
+ }
+ const ttl = 255
+ if err := c.SetTTL(ttl); err != nil {
+ t.Fatal(err)
+ }
+ if v, err := c.TTL(); err != nil {
+ t.Fatal(err)
+ } else if v != ttl {
+ t.Fatalf("got %v; want %v", v, ttl)
+ }
+}