// 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"
"os"
"runtime"
"testing"
"time"
"golang.org/x/net/icmp"
"golang.org/x/net/internal/iana"
"golang.org/x/net/internal/nettest"
"golang.org/x/net/ipv4"
)
var packetConnReadWriteMulticastUDPTests = []struct {
addr string
grp, src *net.UDPAddr
}{
{"224.0.0.0:0", &net.UDPAddr{IP: net.IPv4(224, 0, 0, 254)}, nil}, // see RFC 4727
{"232.0.1.0:0", &net.UDPAddr{IP: net.IPv4(232, 0, 1, 254)}, &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
}
func TestPacketConnReadWriteMulticastUDP(t *testing.T) {
switch runtime.GOOS {
case "nacl", "plan9", "solaris", "windows":
t.Skipf("not supported on %s", runtime.GOOS)
}
ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %s", runtime.GOOS)
}
for _, tt := range packetConnReadWriteMulticastUDPTests {
c, err := net.ListenPacket("udp4", tt.addr)
if err != nil {
t.Fatal(err)
}
defer c.Close()
grp := *tt.grp
grp.Port = c.LocalAddr().(*net.UDPAddr).Port
p := ipv4.NewPacketConn(c)
defer p.Close()
if tt.src == nil {
if err := p.JoinGroup(ifi, &grp); err != nil {
t.Fatal(err)
}
defer p.LeaveGroup(ifi, &grp)
} else {
if err := p.JoinSourceSpecificGroup(ifi, &grp, tt.src); err != nil {
switch runtime.GOOS {
case "freebsd", "linux":
default: // platforms that don't support IGMPv2/3 fail here
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
defer p.LeaveSourceSpecificGroup(ifi, &grp, tt.src)
}
if err := p.SetMulticastInterface(ifi); err != nil {
t.Fatal(err)
}
if _, err := p.MulticastInterface(); err != nil {
t.Fatal(err)
}
if err := p.SetMulticastLoopback(true); err != nil {
t.Fatal(err)
}
if _, err := p.MulticastLoopback(); err != nil {
t.Fatal(err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
wb := []byte("HELLO-R-U-THERE")
for i, toggle := range []bool{true, false, true} {
if err := p.SetControlMessage(cf, toggle); err != nil {
if nettest.ProtocolNotSupported(err) {
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
t.Fatal(err)
}
p.SetMulticastTTL(i + 1)
if n, err := p.WriteTo(wb, nil, &grp); err != nil {
t.Fatal(err)
} else if n != len(wb) {
t.Fatalf("got %v; want %v", n, len(wb))
}
rb := make([]byte, 128)
if n, _, _, err := p.ReadFrom(rb); err != nil {
t.Fatal(err)
} else if !bytes.Equal(rb[:n], wb) {
t.Fatalf("got %v; want %v", rb[:n], wb)
}
}
}
}
var packetConnReadWriteMulticastICMPTests = []struct {
grp, src *net.IPAddr
}{
{&net.IPAddr{IP: net.IPv4(224, 0, 0, 254)}, nil}, // see RFC 4727
{&net.IPAddr{IP: net.IPv4(232, 0, 1, 254)}, &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
}
func TestPacketConnReadWriteMulticastICMP(t *testing.T) {
switch runtime.GOOS {
case "nacl", "plan9", "solaris", "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.FlagMulticast|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %s", runtime.GOOS)
}
for _, tt := range packetConnReadWriteMulticastICMPTests {
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatal(err)
}
defer c.Close()
p := ipv4.NewPacketConn(c)
defer p.Close()
if tt.src == nil {
if err := p.JoinGroup(ifi, tt.grp); err != nil {
t.Fatal(err)
}
defer p.LeaveGroup(ifi, tt.grp)
} else {
if err := p.JoinSourceSpecificGroup(ifi, tt.grp, tt.src); err != nil {
switch runtime.GOOS {
case "freebsd", "linux":
default: // platforms that don't support IGMPv2/3 fail here
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
defer p.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src)
}
if err := p.SetMulticastInterface(ifi); err != nil {
t.Fatal(err)
}
if _, err := p.MulticastInterface(); err != nil {
t.Fatal(err)
}
if err := p.SetMulticastLoopback(true); err != nil {
t.Fatal(err)
}
if _, err := p.MulticastLoopback(); err != nil {
t.Fatal(err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal(nil)
if err != nil {
t.Fatal(err)
}
if err := p.SetControlMessage(cf, toggle); err != nil {
if nettest.ProtocolNotSupported(err) {
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
t.Fatal(err)
}
p.SetMulticastTTL(i + 1)
if n, err := p.WriteTo(wb, nil, tt.grp); err != nil {
t.Fatal(err)
} else if n != len(wb) {
t.Fatalf("got %v; want %v", n, len(wb))
}
rb := make([]byte, 128)
if n, _, _, err := p.ReadFrom(rb); err != nil {
t.Fatal(err)
} else {
m, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
if err != nil {
t.Fatal(err)
}
switch {
case m.Type == ipv4.ICMPTypeEchoReply && m.Code == 0: // net.inet.icmp.bmcastecho=1
case m.Type == ipv4.ICMPTypeEcho && m.Code == 0: // net.inet.icmp.bmcastecho=0
default:
t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
}
}
var rawConnReadWriteMulticastICMPTests = []struct {
grp, src *net.IPAddr
}{
{&net.IPAddr{IP: net.IPv4(224, 0, 0, 254)}, nil}, // see RFC 4727
{&net.IPAddr{IP: net.IPv4(232, 0, 1, 254)}, &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
}
func TestRawConnReadWriteMulticastICMP(t *testing.T) {
if testing.Short() {
t.Skip("to avoid external network")
}
if m, ok := nettest.SupportsRawIPSocket(); !ok {
t.Skip(m)
}
ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %s", runtime.GOOS)
}
for _, tt := range rawConnReadWriteMulticastICMPTests {
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatal(err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatal(err)
}
defer r.Close()
if tt.src == nil {
if err := r.JoinGroup(ifi, tt.grp); err != nil {
t.Fatal(err)
}
defer r.LeaveGroup(ifi, tt.grp)
} else {
if err := r.JoinSourceSpecificGroup(ifi, tt.grp, tt.src); err != nil {
switch runtime.GOOS {
case "freebsd", "linux":
default: // platforms that don't support IGMPv2/3 fail here
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
defer r.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src)
}
if err := r.SetMulticastInterface(ifi); err != nil {
t.Fatal(err)
}
if _, err := r.MulticastInterface(); err != nil {
t.Fatal(err)
}
if err := r.SetMulticastLoopback(true); err != nil {
t.Fatal(err)
}
if _, err := r.MulticastLoopback(); err != nil {
t.Fatal(err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal(nil)
if err != nil {
t.Fatal(err)
}
wh := &ipv4.Header{
Version: ipv4.Version,
Len: ipv4.HeaderLen,
TOS: i + 1,
TotalLen: ipv4.HeaderLen + len(wb),
Protocol: 1,
Dst: tt.grp.IP,
}
if err := r.SetControlMessage(cf, toggle); err != nil {
if nettest.ProtocolNotSupported(err) {
t.Logf("not supported on %s", runtime.GOOS)
continue
}
t.Fatal(err)
}
if err := r.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
t.Fatal(err)
}
r.SetMulticastTTL(i + 1)
if err := r.WriteTo(wh, wb, nil); err != nil {
t.Fatal(err)
}
rb := make([]byte, ipv4.HeaderLen+128)
if rh, b, _, err := r.ReadFrom(rb); err != nil {
t.Fatal(err)
} else {
m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
if err != nil {
t.Fatal(err)
}
switch {
case (rh.Dst.IsLoopback() || rh.Dst.IsLinkLocalUnicast() || rh.Dst.IsGlobalUnicast()) && m.Type == ipv4.ICMPTypeEchoReply && m.Code == 0: // net.inet.icmp.bmcastecho=1
case rh.Dst.IsMulticast() && m.Type == ipv4.ICMPTypeEcho && m.Code == 0: // net.inet.icmp.bmcastecho=0
default:
t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
}
}