/usr/share/gocode/src/code.google.com/p/go.net/ipv4/multicast_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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | // 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.
// +build darwin freebsd linux netbsd openbsd
package ipv4_test
import (
"code.google.com/p/go.net/ipv4"
"net"
"os"
"testing"
)
func TestReadWriteMulticastIPPayloadUDP(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("to avoid external network")
}
c, err := net.ListenPacket("udp4", "224.0.0.0:1024") // see RFC 4727
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
ifi := loopbackInterface()
if ifi == nil {
t.Skip("an appropriate interface not found")
}
dst, err := net.ResolveUDPAddr("udp4", "224.0.0.254:1024") // see RFC 4727
if err != nil {
t.Fatalf("net.ResolveUDPAddr failed: %v", err)
}
p := ipv4.NewPacketConn(c)
if err := p.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.PacketConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := p.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err)
}
if err := p.SetMulticastLoopback(true); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastLoopback failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
if err := p.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.PacketConn.SetControlMessage failed: %v", err)
}
writeThenReadPayload(t, i, p, []byte("HELLO-R-U-THERE"), dst)
}
}
func TestReadWriteMulticastIPPayloadICMP(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
ifi := loopbackInterface()
if ifi == nil {
t.Skip("an appropriate interface not found")
}
dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727
if err != nil {
t.Fatalf("net.ResolveIPAddr failed: %v", err)
}
p := ipv4.NewPacketConn(c)
if err := p.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.PacketConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := p.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmpMessage{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmpEcho{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal()
if err != nil {
t.Fatalf("icmpMessage.Marshal failed: %v", err)
}
if err := p.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.PacketConn.SetControlMessage failed: %v", err)
}
rb := writeThenReadPayload(t, i, p, wb, dst)
m, err := parseICMPMessage(rb)
if err != nil {
t.Fatalf("parseICMPMessage failed: %v", err)
}
if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
func TestReadWriteMulticastIPDatagram(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
ifi := loopbackInterface()
if ifi == nil {
t.Skip("an appropriate interface not found")
}
dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
if err := r.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := r.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmpMessage{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmpEcho{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal()
if err != nil {
t.Fatalf("icmpMessage.Marshal failed: %v", err)
}
if err := r.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
}
rb := writeThenReadDatagram(t, i, r, wb, nil, dst)
m, err := parseICMPMessage(rb)
if err != nil {
t.Fatalf("parseICMPMessage failed: %v", err)
}
if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
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