golang.org/x/net@v0.25.1-0.20240516223405-c87a5b62e243/ipv4/unicastsockopt_test.go (about)

     1  // Copyright 2012 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package ipv4_test
     6  
     7  import (
     8  	"net"
     9  	"runtime"
    10  	"testing"
    11  
    12  	"golang.org/x/net/internal/iana"
    13  	"golang.org/x/net/ipv4"
    14  	"golang.org/x/net/nettest"
    15  )
    16  
    17  func TestConnUnicastSocketOptions(t *testing.T) {
    18  	switch runtime.GOOS {
    19  	case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1", "windows", "zos":
    20  		t.Skipf("not supported on %s", runtime.GOOS)
    21  	}
    22  	if _, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback); err != nil {
    23  		t.Skipf("not available on %s", runtime.GOOS)
    24  	}
    25  
    26  	ln, err := net.Listen("tcp4", "127.0.0.1:0")
    27  	if err != nil {
    28  		t.Fatal(err)
    29  	}
    30  	defer ln.Close()
    31  
    32  	errc := make(chan error, 1)
    33  	go func() {
    34  		c, err := ln.Accept()
    35  		if err != nil {
    36  			errc <- err
    37  			return
    38  		}
    39  		errc <- c.Close()
    40  	}()
    41  
    42  	c, err := net.Dial("tcp4", ln.Addr().String())
    43  	if err != nil {
    44  		t.Fatal(err)
    45  	}
    46  	defer c.Close()
    47  
    48  	testUnicastSocketOptions(t, ipv4.NewConn(c))
    49  
    50  	if err := <-errc; err != nil {
    51  		t.Errorf("server: %v", err)
    52  	}
    53  }
    54  
    55  var packetConnUnicastSocketOptionTests = []struct {
    56  	net, proto, addr string
    57  }{
    58  	{"udp4", "", "127.0.0.1:0"},
    59  	{"ip4", ":icmp", "127.0.0.1"},
    60  }
    61  
    62  func TestPacketConnUnicastSocketOptions(t *testing.T) {
    63  	switch runtime.GOOS {
    64  	case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1", "windows", "zos":
    65  		t.Skipf("not supported on %s", runtime.GOOS)
    66  	}
    67  	if _, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback); err != nil {
    68  		t.Skipf("not available on %s", runtime.GOOS)
    69  	}
    70  
    71  	ok := nettest.SupportsRawSocket()
    72  	for _, tt := range packetConnUnicastSocketOptionTests {
    73  		if tt.net == "ip4" && !ok {
    74  			t.Logf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH)
    75  			continue
    76  		}
    77  		c, err := net.ListenPacket(tt.net+tt.proto, tt.addr)
    78  		if err != nil {
    79  			t.Fatal(err)
    80  		}
    81  		defer c.Close()
    82  
    83  		testUnicastSocketOptions(t, ipv4.NewPacketConn(c))
    84  	}
    85  }
    86  
    87  func TestRawConnUnicastSocketOptions(t *testing.T) {
    88  	if !nettest.SupportsRawSocket() {
    89  		t.Skipf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH)
    90  	}
    91  	if _, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback); err != nil {
    92  		t.Skipf("not available on %s", runtime.GOOS)
    93  	}
    94  
    95  	c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
    96  	if err != nil {
    97  		t.Fatal(err)
    98  	}
    99  	defer c.Close()
   100  
   101  	r, err := ipv4.NewRawConn(c)
   102  	if err != nil {
   103  		t.Fatal(err)
   104  	}
   105  
   106  	testUnicastSocketOptions(t, r)
   107  }
   108  
   109  type testIPv4UnicastConn interface {
   110  	TOS() (int, error)
   111  	SetTOS(int) error
   112  	TTL() (int, error)
   113  	SetTTL(int) error
   114  }
   115  
   116  func testUnicastSocketOptions(t *testing.T, c testIPv4UnicastConn) {
   117  	t.Helper()
   118  
   119  	tos := iana.DiffServCS0 | iana.NotECNTransport
   120  	switch runtime.GOOS {
   121  	case "windows":
   122  		// IP_TOS option is supported on Windows 8 and beyond.
   123  		t.Skipf("not supported on %s", runtime.GOOS)
   124  	}
   125  
   126  	if err := c.SetTOS(tos); err != nil {
   127  		t.Fatal(err)
   128  	}
   129  	if v, err := c.TOS(); err != nil {
   130  		t.Fatal(err)
   131  	} else if v != tos {
   132  		t.Fatalf("got %v; want %v", v, tos)
   133  	}
   134  	const ttl = 255
   135  	if err := c.SetTTL(ttl); err != nil {
   136  		t.Fatal(err)
   137  	}
   138  	if v, err := c.TTL(); err != nil {
   139  		t.Fatal(err)
   140  	} else if v != ttl {
   141  		t.Fatalf("got %v; want %v", v, ttl)
   142  	}
   143  }