--- /dev/null
+// 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 (
+ "net"
+ "runtime"
+ "testing"
+
+ "golang.org/x/net/internal/nettest"
+ "golang.org/x/net/ipv4"
+)
+
+var packetConnMulticastSocketOptionTests = []struct {
+ net, proto, addr string
+ grp, src net.Addr
+}{
+ {"udp4", "", "224.0.0.0:0", &net.UDPAddr{IP: net.IPv4(224, 0, 0, 249)}, nil}, // see RFC 4727
+ {"ip4", ":icmp", "0.0.0.0", &net.IPAddr{IP: net.IPv4(224, 0, 0, 250)}, nil}, // see RFC 4727
+
+ {"udp4", "", "232.0.0.0:0", &net.UDPAddr{IP: net.IPv4(232, 0, 1, 249)}, &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
+ {"ip4", ":icmp", "0.0.0.0", &net.IPAddr{IP: net.IPv4(232, 0, 1, 250)}, &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
+}
+
+func TestPacketConnMulticastSocketOptions(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl", "plan9":
+ 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)
+ }
+
+ m, ok := nettest.SupportsRawIPSocket()
+ for _, tt := range packetConnMulticastSocketOptionTests {
+ if tt.net == "ip4" && !ok {
+ t.Log(m)
+ continue
+ }
+ c, err := net.ListenPacket(tt.net+tt.proto, tt.addr)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer c.Close()
+ p := ipv4.NewPacketConn(c)
+ defer p.Close()
+
+ if tt.src == nil {
+ testMulticastSocketOptions(t, p, ifi, tt.grp)
+ } else {
+ testSourceSpecificMulticastSocketOptions(t, p, ifi, tt.grp, tt.src)
+ }
+ }
+}
+
+var rawConnMulticastSocketOptionTests = []struct {
+ grp, src net.Addr
+}{
+ {&net.IPAddr{IP: net.IPv4(224, 0, 0, 250)}, nil}, // see RFC 4727
+
+ {&net.IPAddr{IP: net.IPv4(232, 0, 1, 250)}, &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771
+}
+
+func TestRawConnMulticastSocketOptions(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl", "plan9":
+ 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 rawConnMulticastSocketOptionTests {
+ 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 {
+ testMulticastSocketOptions(t, r, ifi, tt.grp)
+ } else {
+ testSourceSpecificMulticastSocketOptions(t, r, ifi, tt.grp, tt.src)
+ }
+ }
+}
+
+type testIPv4MulticastConn interface {
+ MulticastTTL() (int, error)
+ SetMulticastTTL(ttl int) error
+ MulticastLoopback() (bool, error)
+ SetMulticastLoopback(bool) error
+ JoinGroup(*net.Interface, net.Addr) error
+ LeaveGroup(*net.Interface, net.Addr) error
+ JoinSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+ LeaveSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+ ExcludeSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+ IncludeSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+}
+
+func testMulticastSocketOptions(t *testing.T, c testIPv4MulticastConn, ifi *net.Interface, grp net.Addr) {
+ const ttl = 255
+ if err := c.SetMulticastTTL(ttl); err != nil {
+ t.Error(err)
+ return
+ }
+ if v, err := c.MulticastTTL(); err != nil {
+ t.Error(err)
+ return
+ } else if v != ttl {
+ t.Errorf("got %v; want %v", v, ttl)
+ return
+ }
+
+ for _, toggle := range []bool{true, false} {
+ if err := c.SetMulticastLoopback(toggle); err != nil {
+ t.Error(err)
+ return
+ }
+ if v, err := c.MulticastLoopback(); err != nil {
+ t.Error(err)
+ return
+ } else if v != toggle {
+ t.Errorf("got %v; want %v", v, toggle)
+ return
+ }
+ }
+
+ if err := c.JoinGroup(ifi, grp); err != nil {
+ t.Error(err)
+ return
+ }
+ if err := c.LeaveGroup(ifi, grp); err != nil {
+ t.Error(err)
+ return
+ }
+}
+
+func testSourceSpecificMulticastSocketOptions(t *testing.T, c testIPv4MulticastConn, ifi *net.Interface, grp, src net.Addr) {
+ // MCAST_JOIN_GROUP -> MCAST_BLOCK_SOURCE -> MCAST_UNBLOCK_SOURCE -> MCAST_LEAVE_GROUP
+ if err := c.JoinGroup(ifi, grp); err != nil {
+ t.Error(err)
+ return
+ }
+ if err := c.ExcludeSourceSpecificGroup(ifi, grp, 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)
+ return
+ }
+ t.Error(err)
+ return
+ }
+ if err := c.IncludeSourceSpecificGroup(ifi, grp, src); err != nil {
+ t.Error(err)
+ return
+ }
+ if err := c.LeaveGroup(ifi, grp); err != nil {
+ t.Error(err)
+ return
+ }
+
+ // MCAST_JOIN_SOURCE_GROUP -> MCAST_LEAVE_SOURCE_GROUP
+ if err := c.JoinSourceSpecificGroup(ifi, grp, src); err != nil {
+ t.Error(err)
+ return
+ }
+ if err := c.LeaveSourceSpecificGroup(ifi, grp, src); err != nil {
+ t.Error(err)
+ return
+ }
+
+ // MCAST_JOIN_SOURCE_GROUP -> MCAST_LEAVE_GROUP
+ if err := c.JoinSourceSpecificGroup(ifi, grp, src); err != nil {
+ t.Error(err)
+ return
+ }
+ if err := c.LeaveGroup(ifi, grp); err != nil {
+ t.Error(err)
+ return
+ }
+}
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