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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 (
"errors"
"os"
"runtime"
"syscall"
"testing"
)
var multicastListenerTests = []struct {
net string
gaddr *UDPAddr
flags Flags
ipv6 bool // test with underlying AF_INET6 socket
}{
// cf. RFC 4727: Experimental Values in IPv4, IPv6, ICMPv4, ICMPv6, UDP, and TCP Headers
{"udp", &UDPAddr{IPv4(224, 0, 0, 254), 12345}, FlagUp | FlagLoopback, false},
{"udp", &UDPAddr{IPv4(224, 0, 0, 254), 12345}, 0, false},
{"udp", &UDPAddr{ParseIP("ff0e::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp", &UDPAddr{ParseIP("ff0e::114"), 12345}, 0, true},
{"udp4", &UDPAddr{IPv4(224, 0, 0, 254), 12345}, FlagUp | FlagLoopback, false},
{"udp4", &UDPAddr{IPv4(224, 0, 0, 254), 12345}, 0, false},
{"udp6", &UDPAddr{ParseIP("ff01::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff01::114"), 12345}, 0, true},
{"udp6", &UDPAddr{ParseIP("ff02::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff02::114"), 12345}, 0, true},
{"udp6", &UDPAddr{ParseIP("ff04::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff04::114"), 12345}, 0, true},
{"udp6", &UDPAddr{ParseIP("ff05::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff05::114"), 12345}, 0, true},
{"udp6", &UDPAddr{ParseIP("ff08::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff08::114"), 12345}, 0, true},
{"udp6", &UDPAddr{ParseIP("ff0e::114"), 12345}, FlagUp | FlagLoopback, true},
{"udp6", &UDPAddr{ParseIP("ff0e::114"), 12345}, 0, true},
}
// TestMulticastListener tests both single and double listen to a test
// listener with same address family, same group address and same port.
func TestMulticastListener(t *testing.T) {
switch runtime.GOOS {
case "netbsd", "openbsd", "plan9", "solaris", "windows":
t.Logf("skipping test on %q", runtime.GOOS)
return
case "linux":
if runtime.GOARCH == "arm" || runtime.GOARCH == "alpha" {
t.Logf("skipping test on %q/%q", runtime.GOOS, runtime.GOARCH)
return
}
}
for _, tt := range multicastListenerTests {
if tt.ipv6 && (!supportsIPv6 || os.Getuid() != 0) {
continue
}
ifi, err := availMulticastInterface(t, tt.flags)
if err != nil {
continue
}
c1, err := ListenMulticastUDP(tt.net, ifi, tt.gaddr)
if err != nil {
t.Fatalf("First ListenMulticastUDP failed: %v", err)
}
checkMulticastListener(t, err, c1, tt.gaddr)
c2, err := ListenMulticastUDP(tt.net, ifi, tt.gaddr)
if err != nil {
t.Fatalf("Second ListenMulticastUDP failed: %v", err)
}
checkMulticastListener(t, err, c2, tt.gaddr)
c2.Close()
switch c1.fd.family {
case syscall.AF_INET:
testIPv4MulticastSocketOptions(t, c1.fd, ifi)
case syscall.AF_INET6:
testIPv6MulticastSocketOptions(t, c1.fd, ifi)
}
c1.Close()
}
}
func TestSimpleMulticastListener(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Logf("skipping test on %q", runtime.GOOS)
return
case "windows":
if testing.Short() || !*testExternal {
t.Logf("skipping test on windows to avoid firewall")
return
}
}
for _, tt := range multicastListenerTests {
if tt.ipv6 {
continue
}
tt.flags = FlagUp | FlagMulticast // for windows testing
ifi, err := availMulticastInterface(t, tt.flags)
if err != nil {
continue
}
c1, err := ListenMulticastUDP(tt.net, ifi, tt.gaddr)
if err != nil {
t.Fatalf("First ListenMulticastUDP failed: %v", err)
}
checkSimpleMulticastListener(t, err, c1, tt.gaddr)
c2, err := ListenMulticastUDP(tt.net, ifi, tt.gaddr)
if err != nil {
t.Fatalf("Second ListenMulticastUDP failed: %v", err)
}
checkSimpleMulticastListener(t, err, c2, tt.gaddr)
c2.Close()
c1.Close()
}
}
func checkMulticastListener(t *testing.T, err error, c *UDPConn, gaddr *UDPAddr) {
if !multicastRIBContains(t, gaddr.IP) {
t.Fatalf("%q not found in RIB", gaddr.String())
}
if c.LocalAddr().String() != gaddr.String() {
t.Fatalf("LocalAddr returns %q, expected %q", c.LocalAddr().String(), gaddr.String())
}
}
func checkSimpleMulticastListener(t *testing.T, err error, c *UDPConn, gaddr *UDPAddr) {
if c.LocalAddr().String() != gaddr.String() {
t.Fatalf("LocalAddr returns %q, expected %q", c.LocalAddr().String(), gaddr.String())
}
}
func availMulticastInterface(t *testing.T, flags Flags) (*Interface, error) {
var ifi *Interface
if flags != Flags(0) {
ift, err := Interfaces()
if err != nil {
t.Fatalf("Interfaces failed: %v", err)
}
for _, x := range ift {
if x.Flags&flags == flags {
ifi = &x
break
}
}
if ifi == nil {
return nil, errors.New("an appropriate multicast interface not found")
}
}
return ifi, nil
}
func multicastRIBContains(t *testing.T, ip IP) bool {
ift, err := Interfaces()
if err != nil {
t.Fatalf("Interfaces failed: %v", err)
}
for _, ifi := range ift {
ifmat, err := ifi.MulticastAddrs()
if err != nil {
t.Fatalf("MulticastAddrs failed: %v", err)
}
for _, ifma := range ifmat {
if ifma.(*IPAddr).IP.Equal(ip) {
return true
}
}
}
return false
}
func testIPv4MulticastSocketOptions(t *testing.T, fd *netFD, ifi *Interface) {
_, err := ipv4MulticastInterface(fd)
if err != nil {
t.Fatalf("ipv4MulticastInterface failed: %v", err)
}
if ifi != nil {
err = setIPv4MulticastInterface(fd, ifi)
if err != nil {
t.Fatalf("setIPv4MulticastInterface failed: %v", err)
}
}
_, err = ipv4MulticastTTL(fd)
if err != nil {
t.Fatalf("ipv4MulticastTTL failed: %v", err)
}
err = setIPv4MulticastTTL(fd, 1)
if err != nil {
t.Fatalf("setIPv4MulticastTTL failed: %v", err)
}
_, err = ipv4MulticastLoopback(fd)
if err != nil {
t.Fatalf("ipv4MulticastLoopback failed: %v", err)
}
err = setIPv4MulticastLoopback(fd, false)
if err != nil {
t.Fatalf("setIPv4MulticastLoopback failed: %v", err)
}
}
func testIPv6MulticastSocketOptions(t *testing.T, fd *netFD, ifi *Interface) {
_, err := ipv6MulticastInterface(fd)
if err != nil {
t.Fatalf("ipv6MulticastInterface failed: %v", err)
}
if ifi != nil {
err = setIPv6MulticastInterface(fd, ifi)
if err != nil {
t.Fatalf("setIPv6MulticastInterface failed: %v", err)
}
}
_, err = ipv6MulticastHopLimit(fd)
if err != nil {
t.Fatalf("ipv6MulticastHopLimit failed: %v", err)
}
err = setIPv6MulticastHopLimit(fd, 1)
if err != nil {
t.Fatalf("setIPv6MulticastHopLimit failed: %v", err)
}
_, err = ipv6MulticastLoopback(fd)
if err != nil {
t.Fatalf("ipv6MulticastLoopback failed: %v", err)
}
err = setIPv6MulticastLoopback(fd, false)
if err != nil {
t.Fatalf("setIPv6MulticastLoopback failed: %v", err)
}
}
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