| // 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" |
| "os" |
| "runtime" |
| "testing" |
| "time" |
| |
| "golang.org/x/net/internal/iana" |
| "golang.org/x/net/internal/icmp" |
| "golang.org/x/net/internal/nettest" |
| "golang.org/x/net/ipv4" |
| ) |
| |
| func TestPacketConnReadWriteMulticastUDP(t *testing.T) { |
| switch runtime.GOOS { |
| case "nacl", "plan9", "solaris", "windows": |
| t.Skipf("not supported on %q", runtime.GOOS) |
| } |
| ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) |
| if ifi == nil { |
| t.Skipf("not available on %q", runtime.GOOS) |
| } |
| |
| c, err := net.ListenPacket("udp4", "224.0.0.0:0") // see RFC 4727 |
| if err != nil { |
| t.Fatalf("net.ListenPacket failed: %v", err) |
| } |
| defer c.Close() |
| |
| _, port, err := net.SplitHostPort(c.LocalAddr().String()) |
| if err != nil { |
| t.Fatalf("net.SplitHostPort failed: %v", err) |
| } |
| dst, err := net.ResolveUDPAddr("udp4", "224.0.0.254:"+port) // see RFC 4727 |
| if err != nil { |
| t.Fatalf("net.ResolveUDPAddr failed: %v", err) |
| } |
| |
| p := ipv4.NewPacketConn(c) |
| defer p.Close() |
| if err := p.JoinGroup(ifi, dst); err != nil { |
| t.Fatalf("ipv4.PacketConn.JoinGroup on %v failed: %v", ifi, err) |
| } |
| if err := p.SetMulticastInterface(ifi); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err) |
| } |
| if _, err := p.MulticastInterface(); err != nil { |
| t.Fatalf("ipv4.PacketConn.MulticastInterface failed: %v", err) |
| } |
| if err := p.SetMulticastLoopback(true); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetMulticastLoopback failed: %v", err) |
| } |
| if _, err := p.MulticastLoopback(); err != nil { |
| t.Fatalf("ipv4.PacketConn.MulticastLoopback failed: %v", err) |
| } |
| cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface |
| |
| for i, toggle := range []bool{true, false, true} { |
| if err := p.SetControlMessage(cf, toggle); err != nil { |
| if nettest.ProtocolNotSupported(err) { |
| t.Skipf("not supported on %q", runtime.GOOS) |
| } |
| t.Fatalf("ipv4.PacketConn.SetControlMessage failed: %v", err) |
| } |
| if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetDeadline failed: %v", err) |
| } |
| p.SetMulticastTTL(i + 1) |
| if _, err := p.WriteTo([]byte("HELLO-R-U-THERE"), nil, dst); err != nil { |
| t.Fatalf("ipv4.PacketConn.WriteTo failed: %v", err) |
| } |
| b := make([]byte, 128) |
| if _, cm, _, err := p.ReadFrom(b); err != nil { |
| t.Fatalf("ipv4.PacketConn.ReadFrom failed: %v", err) |
| } else { |
| t.Logf("rcvd cmsg: %v", cm) |
| } |
| } |
| } |
| |
| func TestPacketConnReadWriteMulticastICMP(t *testing.T) { |
| switch runtime.GOOS { |
| case "nacl", "plan9", "solaris", "windows": |
| t.Skipf("not supported on %q", runtime.GOOS) |
| } |
| if os.Getuid() != 0 { |
| t.Skip("must be root") |
| } |
| ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) |
| if ifi == nil { |
| t.Skipf("not available on %q", runtime.GOOS) |
| } |
| |
| c, err := net.ListenPacket("ip4:icmp", "0.0.0.0") |
| if err != nil { |
| t.Fatalf("net.ListenPacket failed: %v", err) |
| } |
| defer c.Close() |
| |
| dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727 |
| if err != nil { |
| t.Fatalf("net.ResolveIPAddr failed: %v", err) |
| } |
| |
| p := ipv4.NewPacketConn(c) |
| defer p.Close() |
| if err := p.JoinGroup(ifi, dst); err != nil { |
| t.Fatalf("ipv4.PacketConn.JoinGroup on %v failed: %v", ifi, err) |
| } |
| if err := p.SetMulticastInterface(ifi); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err) |
| } |
| if _, err := p.MulticastInterface(); err != nil { |
| t.Fatalf("ipv4.PacketConn.MulticastInterface failed: %v", err) |
| } |
| if err := p.SetMulticastLoopback(true); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetMulticastLoopback failed: %v", err) |
| } |
| if _, err := p.MulticastLoopback(); err != nil { |
| t.Fatalf("ipv4.PacketConn.MulticastLoopback failed: %v", 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.Fatalf("icmp.Message.Marshal failed: %v", err) |
| } |
| if err := p.SetControlMessage(cf, toggle); err != nil { |
| if nettest.ProtocolNotSupported(err) { |
| t.Skipf("not supported on %q", runtime.GOOS) |
| } |
| t.Fatalf("ipv4.PacketConn.SetControlMessage failed: %v", err) |
| } |
| if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil { |
| t.Fatalf("ipv4.PacketConn.SetDeadline failed: %v", err) |
| } |
| p.SetMulticastTTL(i + 1) |
| if _, err := p.WriteTo(wb, nil, dst); err != nil { |
| t.Fatalf("ipv4.PacketConn.WriteTo failed: %v", err) |
| } |
| b := make([]byte, 128) |
| if n, cm, _, err := p.ReadFrom(b); err != nil { |
| t.Fatalf("ipv4.PacketConn.ReadFrom failed: %v", err) |
| } else { |
| t.Logf("rcvd cmsg: %v", cm) |
| m, err := icmp.ParseMessage(iana.ProtocolICMP, b[:n]) |
| if err != nil { |
| t.Fatalf("icmp.ParseMessage failed: %v", 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; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0) |
| } |
| } |
| } |
| } |
| |
| func TestRawConnReadWriteMulticastICMP(t *testing.T) { |
| if testing.Short() { |
| t.Skip("to avoid external network") |
| } |
| if os.Getuid() != 0 { |
| t.Skip("must be root") |
| } |
| ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback) |
| if ifi == nil { |
| t.Skipf("not available on %q", runtime.GOOS) |
| } |
| |
| c, err := net.ListenPacket("ip4:icmp", "0.0.0.0") |
| if err != nil { |
| t.Fatalf("net.ListenPacket failed: %v", err) |
| } |
| defer c.Close() |
| |
| dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727 |
| if err != nil { |
| t.Fatalf("ResolveIPAddr failed: %v", err) |
| } |
| |
| r, err := ipv4.NewRawConn(c) |
| if err != nil { |
| t.Fatalf("ipv4.NewRawConn failed: %v", err) |
| } |
| defer r.Close() |
| if err := r.JoinGroup(ifi, dst); err != nil { |
| t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err) |
| } |
| if err := r.SetMulticastInterface(ifi); err != nil { |
| t.Fatalf("ipv4.RawConn.SetMulticastInterface failed: %v", err) |
| } |
| if _, err := r.MulticastInterface(); err != nil { |
| t.Fatalf("ipv4.RawConn.MulticastInterface failed: %v", err) |
| } |
| if err := r.SetMulticastLoopback(true); err != nil { |
| t.Fatalf("ipv4.RawConn.SetMulticastLoopback failed: %v", err) |
| } |
| if _, err := r.MulticastLoopback(); err != nil { |
| t.Fatalf("ipv4.RawConn.MulticastLoopback failed: %v", 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.Fatalf("icmp.Message.Marshal failed: %v", err) |
| } |
| wh := &ipv4.Header{ |
| Version: ipv4.Version, |
| Len: ipv4.HeaderLen, |
| TOS: i + 1, |
| TotalLen: ipv4.HeaderLen + len(wb), |
| Protocol: 1, |
| Dst: dst.IP, |
| } |
| if err := r.SetControlMessage(cf, toggle); err != nil { |
| if nettest.ProtocolNotSupported(err) { |
| t.Skipf("not supported on %q", runtime.GOOS) |
| } |
| t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err) |
| } |
| if err := r.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil { |
| t.Fatalf("ipv4.RawConn.SetDeadline failed: %v", err) |
| } |
| r.SetMulticastTTL(i + 1) |
| if err := r.WriteTo(wh, wb, nil); err != nil { |
| t.Fatalf("ipv4.RawConn.WriteTo failed: %v", err) |
| } |
| rb := make([]byte, ipv4.HeaderLen+128) |
| if rh, b, cm, err := r.ReadFrom(rb); err != nil { |
| t.Fatalf("ipv4.RawConn.ReadFrom failed: %v", err) |
| } else { |
| t.Logf("rcvd cmsg: %v", cm) |
| m, err := icmp.ParseMessage(iana.ProtocolICMP, b) |
| if err != nil { |
| t.Fatalf("icmp.ParseMessage failed: %v", 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; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0) |
| } |
| } |
| } |
| } |
