Exemplo n.º 1
0
func ExamplePacketConn_nonPrivilegedPing() {
	switch runtime.GOOS {
	case "darwin":
	case "linux":
		log.Println("you may need to adjust the net.ipv4.ping_group_range kernel state")
	default:
		log.Println("not supported on", runtime.GOOS)
		return
	}

	c, err := icmp.ListenPacket("udp6", "fe80::1%en0")
	if err != nil {
		log.Fatal(err)
	}
	defer c.Close()

	wm := icmp.Message{
		Type: ipv6.ICMPTypeEchoRequest, Code: 0,
		Body: &icmp.Echo{
			ID: os.Getpid() & 0xffff, Seq: 1,
			Data: []byte("HELLO-R-U-THERE"),
		},
	}
	wb, err := wm.Marshal(nil)
	if err != nil {
		log.Fatal(err)
	}
	if _, err := c.WriteTo(wb, &net.UDPAddr{IP: net.ParseIP("ff02::1"), Zone: "en0"}); err != nil {
		log.Fatal(err)
	}

	rb := make([]byte, 1500)
	n, peer, err := c.ReadFrom(rb)
	if err != nil {
		log.Fatal(err)
	}
	rm, err := icmp.ParseMessage(58, rb[:n])
	if err != nil {
		log.Fatal(err)
	}
	switch rm.Type {
	case ipv6.ICMPTypeEchoReply:
		log.Printf("got reflection from %v", peer)
	default:
		log.Printf("got %+v; want echo reply", rm)
	}
}
Exemplo n.º 2
0
func TestMarshalAndParseMessageForIPv4(t *testing.T) {
	for i, tt := range marshalAndParseMessageForIPv4Tests {
		b, err := tt.Marshal(nil)
		if err != nil {
			t.Fatal(err)
		}
		m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
		if err != nil {
			t.Fatal(err)
		}
		if m.Type != tt.Type || m.Code != tt.Code {
			t.Errorf("#%v: got %v; want %v", i, m, &tt)
		}
		if !reflect.DeepEqual(m.Body, tt.Body) {
			t.Errorf("#%v: got %v; want %v", i, m.Body, tt.Body)
		}
	}
}
Exemplo n.º 3
0
func TestMarshalAndParseMultipartMessageForIPv4(t *testing.T) {
	for i, tt := range marshalAndParseMultipartMessageForIPv4Tests {
		b, err := tt.Marshal(nil)
		if err != nil {
			t.Fatal(err)
		}
		if b[5] != 32 {
			t.Errorf("#%v: got %v; want 32", i, b[5])
		}
		m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
		if err != nil {
			t.Fatal(err)
		}
		if m.Type != tt.Type || m.Code != tt.Code {
			t.Errorf("#%v: got %v; want %v", i, m, &tt)
		}
		switch m.Type {
		case ipv4.ICMPTypeDestinationUnreachable:
			got, want := m.Body.(*icmp.DstUnreach), tt.Body.(*icmp.DstUnreach)
			if !reflect.DeepEqual(got.Extensions, want.Extensions) {
				t.Error(dumpExtensions(i, got.Extensions, want.Extensions))
			}
			if len(got.Data) != 128 {
				t.Errorf("#%v: got %v; want 128", i, len(got.Data))
			}
		case ipv4.ICMPTypeTimeExceeded:
			got, want := m.Body.(*icmp.TimeExceeded), tt.Body.(*icmp.TimeExceeded)
			if !reflect.DeepEqual(got.Extensions, want.Extensions) {
				t.Error(dumpExtensions(i, got.Extensions, want.Extensions))
			}
			if len(got.Data) != 128 {
				t.Errorf("#%v: got %v; want 128", i, len(got.Data))
			}
		case ipv4.ICMPTypeParameterProblem:
			got, want := m.Body.(*icmp.ParamProb), tt.Body.(*icmp.ParamProb)
			if !reflect.DeepEqual(got.Extensions, want.Extensions) {
				t.Error(dumpExtensions(i, got.Extensions, want.Extensions))
			}
			if len(got.Data) != 128 {
				t.Errorf("#%v: got %v; want 128", i, len(got.Data))
			}
		}
	}
}
Exemplo n.º 4
0
func TestMarshalAndParseMessageForIPv6(t *testing.T) {
	pshicmp := icmp.IPv6PseudoHeader(net.ParseIP("fe80::1"), net.ParseIP("ff02::1"))
	for i, tt := range marshalAndParseMessageForIPv6Tests {
		for _, psh := range [][]byte{pshicmp, nil} {
			b, err := tt.Marshal(psh)
			if err != nil {
				t.Fatal(err)
			}
			m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, b)
			if err != nil {
				t.Fatal(err)
			}
			if m.Type != tt.Type || m.Code != tt.Code {
				t.Errorf("#%v: got %v; want %v", i, m, &tt)
			}
			if !reflect.DeepEqual(m.Body, tt.Body) {
				t.Errorf("#%v: got %v; want %v", i, m.Body, tt.Body)
			}
		}
	}
}
Exemplo n.º 5
0
func TestMarshalAndParseMultipartMessageForIPv6(t *testing.T) {
	pshicmp := icmp.IPv6PseudoHeader(net.ParseIP("fe80::1"), net.ParseIP("ff02::1"))
	for i, tt := range marshalAndParseMultipartMessageForIPv6Tests {
		for _, psh := range [][]byte{pshicmp, nil} {
			b, err := tt.Marshal(psh)
			if err != nil {
				t.Fatal(err)
			}
			if b[4] != 16 {
				t.Errorf("#%v: got %v; want 16", i, b[4])
			}
			m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, b)
			if err != nil {
				t.Fatal(err)
			}
			if m.Type != tt.Type || m.Code != tt.Code {
				t.Errorf("#%v: got %v; want %v", i, m, &tt)
			}
			switch m.Type {
			case ipv6.ICMPTypeDestinationUnreachable:
				got, want := m.Body.(*icmp.DstUnreach), tt.Body.(*icmp.DstUnreach)
				if !reflect.DeepEqual(got.Extensions, want.Extensions) {
					t.Error(dumpExtensions(i, got.Extensions, want.Extensions))
				}
				if len(got.Data) != 128 {
					t.Errorf("#%v: got %v; want 128", i, len(got.Data))
				}
			case ipv6.ICMPTypeTimeExceeded:
				got, want := m.Body.(*icmp.TimeExceeded), tt.Body.(*icmp.TimeExceeded)
				if !reflect.DeepEqual(got.Extensions, want.Extensions) {
					t.Error(dumpExtensions(i, got.Extensions, want.Extensions))
				}
				if len(got.Data) != 128 {
					t.Errorf("#%v: got %v; want 128", i, len(got.Data))
				}
			}
		}
	}
}
Exemplo n.º 6
0
func ExamplePacketConn_nonPrivilegedPing() {
	c, err := icmp.ListenPacket("udp6", "fe80::1%en0")
	if err != nil {
		log.Fatal(err)
	}
	defer c.Close()

	wm := icmp.Message{
		Type: ipv6.ICMPTypeEchoRequest, Code: 0,
		Body: &icmp.Echo{
			ID: os.Getpid() & 0xffff, Seq: 1,
			Data: []byte("HELLO-R-U-THERE"),
		},
	}
	wb, err := wm.Marshal(nil)
	if err != nil {
		log.Fatal(err)
	}
	if _, err := c.WriteTo(wb, &net.UDPAddr{IP: net.ParseIP("ff02::1"), Zone: "en0"}); err != nil {
		log.Fatal(err)
	}

	rb := make([]byte, 1500)
	n, peer, err := c.ReadFrom(rb)
	if err != nil {
		log.Fatal(err)
	}
	rm, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n])
	if err != nil {
		log.Fatal(err)
	}
	switch rm.Type {
	case ipv6.ICMPTypeEchoReply:
		log.Printf("got reflection from %v", peer)
	default:
		log.Printf("got %+v; want echo reply", rm)
	}
}
Exemplo n.º 7
0
func TestPacketConnReadWriteMulticastICMP(t *testing.T) {
	switch runtime.GOOS {
	case "freebsd": // due to a bug on loopback marking
		// See http://www.freebsd.org/cgi/query-pr.cgi?pr=180065.
		t.Skipf("not supported on %s", runtime.GOOS)
	case "nacl", "plan9", "solaris", "windows":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv6 {
		t.Skip("ipv6 is not supported")
	}
	if m, ok := nettest.SupportsRawIPSocket(); !ok {
		t.Skip(m)
	}
	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
	if ifi == nil {
		t.Skipf("not available on %s", runtime.GOOS)
	}

	for _, tt := range packetConnReadWriteMulticastICMPTests {
		c, err := net.ListenPacket("ip6:ipv6-icmp", "::")
		if err != nil {
			t.Fatal(err)
		}
		defer c.Close()

		pshicmp := icmp.IPv6PseudoHeader(c.LocalAddr().(*net.IPAddr).IP, tt.grp.IP)
		p := ipv6.NewPacketConn(c)
		defer p.Close()
		if tt.src == nil {
			if err := p.JoinGroup(ifi, tt.grp); err != nil {
				t.Fatal(err)
			}
			defer p.LeaveGroup(ifi, tt.grp)
		} else {
			if err := p.JoinSourceSpecificGroup(ifi, tt.grp, tt.src); err != nil {
				switch runtime.GOOS {
				case "freebsd", "linux":
				default: // platforms that don't support MLDv2 fail here
					t.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			}
			defer p.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src)
		}
		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)
		}

		cm := ipv6.ControlMessage{
			TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
			Src:          net.IPv6loopback,
			IfIndex:      ifi.Index,
		}
		cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU

		var f ipv6.ICMPFilter
		f.SetAll(true)
		f.Accept(ipv6.ICMPTypeEchoReply)
		if err := p.SetICMPFilter(&f); err != nil {
			t.Fatal(err)
		}

		var psh []byte
		for i, toggle := range []bool{true, false, true} {
			if toggle {
				psh = nil
				if err := p.SetChecksum(true, 2); err != nil {
					t.Fatal(err)
				}
			} else {
				psh = pshicmp
				// Some platforms never allow to
				// disable the kernel checksum
				// processing.
				p.SetChecksum(false, -1)
			}
			wb, err := (&icmp.Message{
				Type: ipv6.ICMPTypeEchoRequest, Code: 0,
				Body: &icmp.Echo{
					ID: os.Getpid() & 0xffff, Seq: i + 1,
					Data: []byte("HELLO-R-U-THERE"),
				},
			}).Marshal(psh)
			if err != nil {
				t.Fatal(err)
			}
			if err := p.SetControlMessage(cf, toggle); err != nil {
				if nettest.ProtocolNotSupported(err) {
					t.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			}
			if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
				t.Fatal(err)
			}
			cm.HopLimit = i + 1
			if n, err := p.WriteTo(wb, &cm, 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, cm, _, err := p.ReadFrom(rb); err != nil {
				switch runtime.GOOS {
				case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
					t.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			} else {
				t.Logf("rcvd cmsg: %v", cm)
				if m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n]); err != nil {
					t.Fatal(err)
				} else if m.Type != ipv6.ICMPTypeEchoReply || m.Code != 0 {
					t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv6.ICMPTypeEchoReply, 0)
				}
			}
		}
	}
}
Exemplo n.º 8
0
func TestPingGoogle(t *testing.T) {
	if testing.Short() {
		t.Skip("to avoid external network")
	}
	switch runtime.GOOS {
	case "darwin":
	case "linux":
		t.Log("you may need to adjust the net.ipv4.ping_group_range kernel state")
	default:
		t.Skipf("not supported on %s", runtime.GOOS)
	}

	m, ok := nettest.SupportsRawIPSocket()
	for i, tt := range pingGoogleTests {
		if tt.network[:2] == "ip" && !ok {
			t.Log(m)
			continue
		}
		c, err := icmp.ListenPacket(tt.network, tt.address)
		if err != nil {
			t.Error(err)
			continue
		}
		defer c.Close()

		dst, err := googleAddr(c, tt.protocol)
		if err != nil {
			t.Error(err)
			continue
		}

		wm := icmp.Message{
			Type: tt.mtype, Code: 0,
			Body: &icmp.Echo{
				ID: os.Getpid() & 0xffff, Seq: 1 << uint(i),
				Data: []byte("HELLO-R-U-THERE"),
			},
		}
		wb, err := wm.Marshal(nil)
		if err != nil {
			t.Error(err)
			continue
		}
		if n, err := c.WriteTo(wb, dst); err != nil {
			t.Error(err, dst)
			continue
		} else if n != len(wb) {
			t.Errorf("got %v; want %v", n, len(wb))
			continue
		}

		rb := make([]byte, 1500)
		n, peer, err := c.ReadFrom(rb)
		if err != nil {
			t.Error(err)
			continue
		}
		rm, err := icmp.ParseMessage(tt.protocol, rb[:n])
		if err != nil {
			t.Error(err)
			continue
		}
		switch rm.Type {
		case ipv4.ICMPTypeEchoReply, ipv6.ICMPTypeEchoReply:
			t.Logf("got reflection from %v", peer)
		default:
			t.Errorf("got %+v; want echo reply", rm)
		}
	}
}
Exemplo n.º 9
0
func TestPacketConnReadWriteUnicastICMP(t *testing.T) {
	switch runtime.GOOS {
	case "nacl", "plan9", "solaris", "windows":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !supportsIPv6 {
		t.Skip("ipv6 is not supported")
	}
	if m, ok := nettest.SupportsRawIPSocket(); !ok {
		t.Skip(m)
	}

	c, err := net.ListenPacket("ip6:ipv6-icmp", "::1")
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()
	p := ipv6.NewPacketConn(c)
	defer p.Close()

	dst, err := net.ResolveIPAddr("ip6", "::1")
	if err != nil {
		t.Fatal(err)
	}

	pshicmp := icmp.IPv6PseudoHeader(c.LocalAddr().(*net.IPAddr).IP, dst.IP)
	cm := ipv6.ControlMessage{
		TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
		Src:          net.IPv6loopback,
	}
	cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
	if ifi != nil {
		cm.IfIndex = ifi.Index
	}

	var f ipv6.ICMPFilter
	f.SetAll(true)
	f.Accept(ipv6.ICMPTypeEchoReply)
	if err := p.SetICMPFilter(&f); err != nil {
		t.Fatal(err)
	}

	var psh []byte
	for i, toggle := range []bool{true, false, true} {
		if toggle {
			psh = nil
			if err := p.SetChecksum(true, 2); err != nil {
				t.Fatal(err)
			}
		} else {
			psh = pshicmp
			// Some platforms never allow to disable the
			// kernel checksum processing.
			p.SetChecksum(false, -1)
		}
		wb, err := (&icmp.Message{
			Type: ipv6.ICMPTypeEchoRequest, Code: 0,
			Body: &icmp.Echo{
				ID: os.Getpid() & 0xffff, Seq: i + 1,
				Data: []byte("HELLO-R-U-THERE"),
			},
		}).Marshal(psh)
		if err != nil {
			t.Fatal(err)
		}
		if err := p.SetControlMessage(cf, toggle); err != nil {
			if nettest.ProtocolNotSupported(err) {
				t.Skipf("not supported on %s", runtime.GOOS)
			}
			t.Fatal(err)
		}
		cm.HopLimit = i + 1
		if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
			t.Fatal(err)
		}
		if n, err := p.WriteTo(wb, &cm, dst); err != nil {
			t.Fatal(err)
		} else if n != len(wb) {
			t.Fatalf("got %v; want %v", n, len(wb))
		}
		rb := make([]byte, 128)
		if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
			t.Fatal(err)
		}
		if n, cm, _, err := p.ReadFrom(rb); err != nil {
			switch runtime.GOOS {
			case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
				t.Logf("not supported on %s", runtime.GOOS)
				continue
			}
			t.Fatal(err)
		} else {
			t.Logf("rcvd cmsg: %v", cm)
			if m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n]); err != nil {
				t.Fatal(err)
			} else if m.Type != ipv6.ICMPTypeEchoReply || m.Code != 0 {
				t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv6.ICMPTypeEchoReply, 0)
			}
		}
	}
}
Exemplo n.º 10
0
func ExamplePacketConn_tracingIPPacketRoute() {
	// Tracing an IP packet route to www.google.com.

	const host = "www.google.com"
	ips, err := net.LookupIP(host)
	if err != nil {
		log.Fatal(err)
	}
	var dst net.IPAddr
	for _, ip := range ips {
		if ip.To4() != nil {
			dst.IP = ip
			fmt.Printf("using %v for tracing an IP packet route to %s\n", dst.IP, host)
			break
		}
	}
	if dst.IP == nil {
		log.Fatal("no A record found")
	}

	c, err := net.ListenPacket(fmt.Sprintf("ip4:%d", iana.ProtocolICMP), "0.0.0.0") // ICMP for IPv4
	if err != nil {
		log.Fatal(err)
	}
	defer c.Close()
	p := ipv4.NewPacketConn(c)

	if err := p.SetControlMessage(ipv4.FlagTTL|ipv4.FlagSrc|ipv4.FlagDst|ipv4.FlagInterface, true); err != nil {
		log.Fatal(err)
	}
	wm := icmp.Message{
		Type: ipv4.ICMPTypeEcho, Code: 0,
		Body: &icmp.Echo{
			ID:   os.Getpid() & 0xffff,
			Data: []byte("HELLO-R-U-THERE"),
		},
	}

	rb := make([]byte, 1500)
	for i := 1; i <= 64; i++ { // up to 64 hops
		wm.Body.(*icmp.Echo).Seq = i
		wb, err := wm.Marshal(nil)
		if err != nil {
			log.Fatal(err)
		}
		if err := p.SetTTL(i); err != nil {
			log.Fatal(err)
		}

		// In the real world usually there are several
		// multiple traffic-engineered paths for each hop.
		// You may need to probe a few times to each hop.
		begin := time.Now()
		if _, err := p.WriteTo(wb, nil, &dst); err != nil {
			log.Fatal(err)
		}
		if err := p.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
			log.Fatal(err)
		}
		n, cm, peer, err := p.ReadFrom(rb)
		if err != nil {
			if err, ok := err.(net.Error); ok && err.Timeout() {
				fmt.Printf("%v\t*\n", i)
				continue
			}
			log.Fatal(err)
		}
		rm, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
		if err != nil {
			log.Fatal(err)
		}
		rtt := time.Since(begin)

		// In the real world you need to determine whether the
		// received message is yours using ControlMessage.Src,
		// ControlMessage.Dst, icmp.Echo.ID and icmp.Echo.Seq.
		switch rm.Type {
		case ipv4.ICMPTypeTimeExceeded:
			names, _ := net.LookupAddr(peer.String())
			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, cm)
		case ipv4.ICMPTypeEchoReply:
			names, _ := net.LookupAddr(peer.String())
			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, cm)
			return
		default:
			log.Printf("unknown ICMP message: %+v\n", rm)
		}
	}
}
Exemplo n.º 11
0
func (p *Pinger) procRecv(recv *packet, queue map[string]*net.IPAddr) {
	var ipaddr *net.IPAddr
	switch adr := recv.addr.(type) {
	case *net.IPAddr:
		ipaddr = adr
	case *net.UDPAddr:
		ipaddr = &net.IPAddr{IP: adr.IP, Zone: adr.Zone}
	default:
		return
	}

	addr := ipaddr.String()
	p.mu.Lock()
	if _, ok := p.addrs[addr]; !ok {
		p.mu.Unlock()
		return
	}
	p.mu.Unlock()

	var bytes []byte
	var proto int
	if isIPv4(ipaddr.IP) {
		if p.network == "ip" {
			bytes = ipv4Payload(recv.bytes)
		} else {
			bytes = recv.bytes
		}
		proto = ProtocolICMP
	} else if isIPv6(ipaddr.IP) {
		bytes = recv.bytes
		proto = ProtocolIPv6ICMP
	} else {
		return
	}

	var m *icmp.Message
	var err error
	if m, err = icmp.ParseMessage(proto, bytes); err != nil {
		return
	}

	if m.Type != ipv4.ICMPTypeEchoReply && m.Type != ipv6.ICMPTypeEchoReply {
		return
	}

	var rtt time.Duration
	switch pkt := m.Body.(type) {
	case *icmp.Echo:
		p.mu.Lock()
		if pkt.ID == p.id && pkt.Seq == p.seq {
			rtt = time.Since(bytesToTime(pkt.Data[:TimeSliceLength]))
		}
		p.mu.Unlock()
	default:
		return
	}

	if _, ok := queue[addr]; ok {
		delete(queue, addr)
		p.mu.Lock()
		handler := p.OnRecv
		p.mu.Unlock()
		if handler != nil {
			handler(ipaddr, rtt)
		}
	}
}
Exemplo n.º 12
0
func TestPacketConnReadWriteUnicastICMP(t *testing.T) {
	switch runtime.GOOS {
	case "nacl", "plan9", "solaris", "windows":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if m, ok := nettest.SupportsRawIPSocket(); !ok {
		t.Skip(m)
	}
	ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
	if ifi == nil {
		t.Skipf("not available on %s", runtime.GOOS)
	}

	c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
	if err != nil {
		t.Fatal(err)
	}
	defer c.Close()

	dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
	if err != nil {
		t.Fatal(err)
	}
	p := ipv4.NewPacketConn(c)
	defer p.Close()
	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)
		}
		if err := p.SetControlMessage(cf, toggle); err != nil {
			if nettest.ProtocolNotSupported(err) {
				t.Logf("not supported on %s", runtime.GOOS)
				continue
			}
			t.Fatal(err)
		}
		p.SetTTL(i + 1)
		if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
			t.Fatal(err)
		}
		if n, err := p.WriteTo(wb, nil, dst); err != nil {
			t.Fatal(err)
		} else if n != len(wb) {
			t.Fatalf("got %v; want %v", n, len(wb))
		}
		rb := make([]byte, 128)
	loop:
		if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
			t.Fatal(err)
		}
		if n, cm, _, err := p.ReadFrom(rb); err != nil {
			switch runtime.GOOS {
			case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
				t.Logf("not supported on %s", runtime.GOOS)
				continue
			}
			t.Fatal(err)
		} else {
			t.Logf("rcvd cmsg: %v", cm)
			m, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
			if err != nil {
				t.Fatal(err)
			}
			if runtime.GOOS == "linux" && m.Type == ipv4.ICMPTypeEcho {
				// On Linux we must handle own sent packets.
				goto loop
			}
			if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
				t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
			}
		}
	}
}
Exemplo n.º 13
0
func doPing(tt pingTest, seq int) error {
	c, err := icmp.ListenPacket(tt.network, tt.address)
	if err != nil {
		return err
	}
	defer c.Close()

	dst, err := googleAddr(c, tt.protocol)
	if err != nil {
		return err
	}

	if tt.network != "udp6" && tt.protocol == iana.ProtocolIPv6ICMP {
		var f ipv6.ICMPFilter
		f.SetAll(true)
		f.Accept(ipv6.ICMPTypeDestinationUnreachable)
		f.Accept(ipv6.ICMPTypePacketTooBig)
		f.Accept(ipv6.ICMPTypeTimeExceeded)
		f.Accept(ipv6.ICMPTypeParameterProblem)
		f.Accept(ipv6.ICMPTypeEchoReply)
		if err := c.IPv6PacketConn().SetICMPFilter(&f); err != nil {
			return err
		}
	}

	wm := icmp.Message{
		Type: tt.mtype, Code: 0,
		Body: &icmp.Echo{
			ID: os.Getpid() & 0xffff, Seq: 1 << uint(seq),
			Data: []byte("HELLO-R-U-THERE"),
		},
	}
	wb, err := wm.Marshal(nil)
	if err != nil {
		return err
	}
	if n, err := c.WriteTo(wb, dst); err != nil {
		return err
	} else if n != len(wb) {
		return fmt.Errorf("got %v; want %v", n, len(wb))
	}

	rb := make([]byte, 1500)
	if err := c.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
		return err
	}
	n, peer, err := c.ReadFrom(rb)
	if err != nil {
		return err
	}
	rm, err := icmp.ParseMessage(tt.protocol, rb[:n])
	if err != nil {
		return err
	}
	switch rm.Type {
	case ipv4.ICMPTypeEchoReply, ipv6.ICMPTypeEchoReply:
		return nil
	default:
		return fmt.Errorf("got %+v from %v; want echo reply", rm, peer)
	}
}
Exemplo n.º 14
0
func TestRawConnReadWriteMulticastICMP(t *testing.T) {
	if testing.Short() {
		t.Skip("to avoid external network")
	}
	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 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 nettest.ProtocolNotSupported(err) {
					t.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			}
			if err := r.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
				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, cm, err := r.ReadFrom(rb); err != nil {
				t.Fatal(err)
			} else {
				t.Logf("rcvd cmsg: %v", cm)
				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)
				}
			}
		}
	}
}
Exemplo n.º 15
0
func TestPacketConnReadWriteMulticastICMP(t *testing.T) {
	switch runtime.GOOS {
	case "nacl", "plan9", "solaris", "windows":
		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 packetConnReadWriteMulticastICMPTests {
		c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
		if err != nil {
			t.Fatal(err)
		}
		defer c.Close()

		p := ipv4.NewPacketConn(c)
		defer p.Close()
		if tt.src == nil {
			if err := p.JoinGroup(ifi, tt.grp); err != nil {
				t.Fatal(err)
			}
			defer p.LeaveGroup(ifi, tt.grp)
		} 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.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			}
			defer p.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src)
		}
		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

		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 nettest.ProtocolNotSupported(err) {
					t.Logf("not supported on %s", runtime.GOOS)
					continue
				}
				t.Fatal(err)
			}
			if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
				t.Fatal(err)
			}
			p.SetMulticastTTL(i + 1)
			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, cm, _, err := p.ReadFrom(rb); err != nil {
				t.Fatal(err)
			} else {
				t.Logf("rcvd cmsg: %v", cm)
				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)
				}
			}
		}
	}
}