// 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/ipv4" "golang.org/x/net/nettest" ) 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 "fuchsia", "hurd", "js", "nacl", "plan9": t.Skipf("not supported on %s", runtime.GOOS) } ifi, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) if err != nil { t.Skipf("not available on %s", runtime.GOOS) } ok := nettest.SupportsRawSocket() for _, tt := range packetConnMulticastSocketOptionTests { if tt.net == "ip4" && !ok { t.Logf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH) 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 "fuchsia", "hurd", "js", "nacl", "plan9": t.Skipf("not supported on %s", runtime.GOOS) } if !nettest.SupportsRawSocket() { t.Skipf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH) } ifi, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) if err != 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) { t.Helper() 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) { t.Helper() // 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 } }