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// Copyright 2011 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 net
import (
"flag"
"os"
"runtime"
"testing"
)
var multicast = flag.Bool("multicast", false, "enable multicast tests")
var joinAndLeaveGroupUDPTests = []struct {
net string
laddr IP
gaddr IP
flags Flags
ipv6 bool
}{
// cf. RFC 4727: Experimental Values in IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP Headers
{"udp", IPv4zero, IPv4(224, 0, 0, 254), (FlagUp | FlagLoopback), false},
{"udp4", IPv4zero, IPv4(224, 0, 0, 254), (FlagUp | FlagLoopback), false},
{"udp", IPv6unspecified, ParseIP("ff0e::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff01::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff02::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff04::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff05::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff08::114"), (FlagUp | FlagLoopback), true},
{"udp6", IPv6unspecified, ParseIP("ff0e::114"), (FlagUp | FlagLoopback), true},
}
func TestJoinAndLeaveGroupUDP(t *testing.T) {
if runtime.GOOS == "windows" {
return
}
if !*multicast {
t.Logf("test disabled; use --multicast to enable")
return
}
for _, tt := range joinAndLeaveGroupUDPTests {
var (
ifi *Interface
found bool
)
if tt.ipv6 && (!supportsIPv6 || os.Getuid() != 0) {
continue
}
ift, err := Interfaces()
if err != nil {
t.Fatalf("Interfaces() failed: %v", err)
}
for _, x := range ift {
if x.Flags&tt.flags == tt.flags {
ifi = &x
break
}
}
if ifi == nil {
t.Logf("an appropriate multicast interface not found")
return
}
c, err := ListenUDP(tt.net, &UDPAddr{IP: tt.laddr})
if err != nil {
t.Fatal(err)
}
defer c.Close()
if err := c.JoinGroup(ifi, tt.gaddr); err != nil {
t.Fatal(err)
}
ifmat, err := ifi.MulticastAddrs()
if err != nil {
t.Fatalf("MulticastAddrs() failed: %v", err)
}
for _, ifma := range ifmat {
if ifma.(*IPAddr).IP.Equal(tt.gaddr) {
found = true
break
}
}
if !found {
t.Fatalf("%q not found in RIB", tt.gaddr.String())
}
if err := c.LeaveGroup(ifi, tt.gaddr); err != nil {
t.Fatal(err)
}
}
}
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