This file is indexed.

/usr/share/gocode/src/code.google.com/p/go.net/ipv6/sockopt_test.go is in golang-go.net-dev 0.0~hg20131201-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
// 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 (
	"code.google.com/p/go.net/ipv6"
	"net"
	"os"
	"runtime"
	"testing"
)

var supportsIPv6 bool

func init() {
	if ln, err := net.Listen("tcp6", "[::1]:0"); err == nil {
		ln.Close()
		supportsIPv6 = true
	}
}

var condFatalf = func() func(*testing.T, string, ...interface{}) {
	// A few APIs are not implemented yet on some platforms.
	switch runtime.GOOS {
	case "darwin", "plan9", "windows":
		return (*testing.T).Logf
	}
	return (*testing.T).Fatalf
}()

func TestConnInitiatorPathMTU(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if !supportsIPv6 {
		t.Skip("ipv6 is not supported")
	}

	ln, err := net.Listen("tcp6", "[::1]:0")
	if err != nil {
		t.Fatalf("net.Listen failed: %v", err)
	}
	defer ln.Close()

	done := make(chan bool)
	go acceptor(t, ln, done)

	c, err := net.Dial("tcp6", ln.Addr().String())
	if err != nil {
		t.Fatalf("net.Dial failed: %v", err)
	}
	defer c.Close()

	if pmtu, err := ipv6.NewConn(c).PathMTU(); err != nil {
		condFatalf(t, "ipv6.Conn.PathMTU failed: %v", err)
	} else {
		t.Logf("path mtu for %v: %v", c.RemoteAddr(), pmtu)
	}

	<-done
}

func TestConnResponderPathMTU(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if !supportsIPv6 {
		t.Skip("ipv6 is not supported")
	}

	ln, err := net.Listen("tcp6", "[::1]:0")
	if err != nil {
		t.Fatalf("net.Listen failed: %v", err)
	}
	defer ln.Close()

	done := make(chan bool)
	go connector(t, "tcp6", ln.Addr().String(), done)

	c, err := ln.Accept()
	if err != nil {
		t.Fatalf("net.Accept failed: %v", err)
	}
	defer c.Close()

	if pmtu, err := ipv6.NewConn(c).PathMTU(); err != nil {
		condFatalf(t, "ipv6.Conn.PathMTU failed: %v", err)
	} else {
		t.Logf("path mtu for %v: %v", c.RemoteAddr(), pmtu)
	}

	<-done
}

func TestPacketConnChecksum(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if !supportsIPv6 {
		t.Skip("ipv6 is not supported")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

	c, err := net.ListenPacket("ip6:89", "::") // OSPF for IPv6
	if err != nil {
		t.Fatalf("net.ListenPacket failed: %v", err)
	}
	defer c.Close()

	p := ipv6.NewPacketConn(c)
	offset := 12 // see RFC 5340

	for _, toggle := range []bool{false, true} {
		if err := p.SetChecksum(toggle, offset); err != nil {
			if toggle {
				t.Fatalf("ipv6.PacketConn.SetChecksum(%v, %v) failed: %v", toggle, offset, err)
			} else {
				// Some platforms never allow to disable the kernel
				// checksum processing.
				t.Logf("ipv6.PacketConn.SetChecksum(%v, %v) failed: %v", toggle, offset, err)
			}
		}
		if on, offset, err := p.Checksum(); err != nil {
			t.Fatalf("ipv6.PacketConn.Checksum failed: %v", err)
		} else {
			t.Logf("kernel checksum processing enabled=%v, offset=%v", on, offset)
		}
	}
}