| // 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" |
| "fmt" |
| "net" |
| "os" |
| "runtime" |
| "testing" |
| |
| "golang.org/x/net/icmp" |
| "golang.org/x/net/internal/iana" |
| "golang.org/x/net/ipv4" |
| "golang.org/x/net/nettest" |
| ) |
| |
| var packetConnReadWriteMulticastUDPTests = []struct { |
| addr string |
| grp, src *net.IPAddr |
| }{ |
| {"224.0.0.0:0", &net.IPAddr{IP: net.IPv4(224, 0, 0, 254)}, nil}, // see RFC 4727 |
| |
| {"232.0.1.0:0", &net.IPAddr{IP: net.IPv4(232, 0, 1, 254)}, &net.IPAddr{IP: net.IPv4(127, 0, 0, 1)}}, // see RFC 5771 |
| } |
| |
| func TestPacketConnReadWriteMulticastUDP(t *testing.T) { |
| switch runtime.GOOS { |
| case "fuchsia", "hurd", "illumos", "js", "nacl", "plan9", "solaris", "wasip1", "windows", "zos": |
| t.Skipf("not supported on %s", runtime.GOOS) |
| } |
| ifi, err := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) |
| if err != nil { |
| t.Skip(err) |
| } |
| |
| for _, tt := range packetConnReadWriteMulticastUDPTests { |
| t.Run(fmt.Sprintf("addr=%s/grp=%s/src=%s", tt.addr, tt.grp, tt.src), func(t *testing.T) { |
| c, err := net.ListenPacket("udp4", tt.addr) |
| if err != nil { |
| t.Fatal(err) |
| } |
| p := ipv4.NewPacketConn(c) |
| defer func() { |
| if err := p.Close(); err != nil { |
| t.Error(err) |
| } |
| }() |
| |
| grp := *p.LocalAddr().(*net.UDPAddr) |
| grp.IP = tt.grp.IP |
| if tt.src == nil { |
| if err := p.JoinGroup(ifi, &grp); err != nil { |
| t.Fatal(err) |
| } |
| defer func() { |
| if err := p.LeaveGroup(ifi, &grp); err != nil { |
| t.Error(err) |
| } |
| }() |
| } 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.Skipf("not supported on %s", runtime.GOOS) |
| } |
| t.Fatal(err) |
| } |
| defer func() { |
| if err := p.LeaveSourceSpecificGroup(ifi, &grp, tt.src); err != nil { |
| t.Error(err) |
| } |
| }() |
| } |
| 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 protocolNotSupported(err) { |
| t.Logf("not supported on %s", runtime.GOOS) |
| continue |
| } |
| t.Fatal(err) |
| } |
| if err := p.SetMulticastTTL(i + 1); err != nil { |
| t.Fatal(err) |
| } |
| } |
| 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) { |
| 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) |
| // Unable to obtain loopback interface on z/OS, so instead we test on any multicast |
| // capable interface. |
| if runtime.GOOS == "zos" { |
| ifi, err = nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast) |
| } |
| if err != nil { |
| t.Skip(err) |
| } |
| |
| for _, tt := range packetConnReadWriteMulticastICMPTests { |
| t.Run(fmt.Sprintf("grp=%s/src=%s", tt.grp, tt.src), func(t *testing.T) { |
| c, err := net.ListenPacket("ip4:icmp", "0.0.0.0") |
| if err != nil { |
| t.Fatal(err) |
| } |
| p := ipv4.NewPacketConn(c) |
| defer func() { |
| if err := p.Close(); err != nil { |
| t.Error(err) |
| } |
| }() |
| |
| if tt.src == nil { |
| if err := p.JoinGroup(ifi, tt.grp); err != nil { |
| t.Fatal(err) |
| } |
| defer func() { |
| if err := p.LeaveGroup(ifi, tt.grp); err != nil { |
| t.Error(err) |
| } |
| }() |
| } 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.Skipf("not supported on %s", runtime.GOOS) |
| } |
| t.Fatal(err) |
| } |
| defer func() { |
| if err := p.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src); err != nil { |
| t.Error(err) |
| } |
| }() |
| } |
| 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.FlagDst | ipv4.FlagInterface |
| if runtime.GOOS != "illumos" && runtime.GOOS != "solaris" { |
| // Illumos and Solaris never allow modification of ICMP properties. |
| cf |= ipv4.FlagTTL |
| } |
| |
| 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 protocolNotSupported(err) { |
| t.Logf("not supported on %s", runtime.GOOS) |
| continue |
| } |
| t.Fatal(err) |
| } |
| if err := p.SetMulticastTTL(i + 1); err != nil { |
| t.Fatal(err) |
| } |
| 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 !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 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 protocolNotSupported(err) { |
| t.Logf("not supported on %s", runtime.GOOS) |
| continue |
| } |
| 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) |
| } |
| } |
| } |
| } |
| } |
