Golang ipv4.NewRawConn函数代码示例

func TestRawConnMulticastSocketOptions(t *testing.T) {
	switch runtime.GOOS {
	case "nacl", "plan9", "solaris":
		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()

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.NewRawConn failed: %v", err)
	}

	testMulticastSocketOptions(t, r, ifi, &net.IPAddr{IP: net.IPv4(224, 0, 0, 250)}) /// see RFC 4727
}

func TestRawConnUnicastSocketOptions(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}
	ifi := loopbackInterface()
	if ifi == nil {
		t.Skipf("not available on %q", runtime.GOOS)
	}

	c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
	if err != nil {
		t.Fatalf("net.ListenPacket failed: %v", err)
	}
	defer c.Close()

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.NewRawConn failed: %v", err)
	}

	testUnicastSocketOptions(t, r)
}

func TestReadWriteUnicastIPDatagram(t *testing.T) {
	if os.Getuid() != 0 {
		t.Logf("skipping test; must be root")
		return
	}

	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", "127.0.0.1")
	if err != nil {
		t.Fatalf("ResolveIPAddr failed: %v", err)
	}

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.NewRawConn failed: %v", err)
	}
	id := os.Getpid() & 0xffff
	pld := newICMPEchoRequest(id, 1, 128, []byte("HELLO-R-U-THERE"))
	runDatagramTransponder(t, r, pld, nil, dst)
}

func ExampleWriteIPOSPFHello() {
	var ifs []*net.Interface
	en0, err := net.InterfaceByName("en0")
	if err != nil {
		log.Fatal(err)
	}
	ifs = append(ifs, en0)
	en1, err := net.InterfaceByIndex(911)
	if err != nil {
		log.Fatal(err)
	}
	ifs = append(ifs, en1)

	c, err := net.ListenPacket("ip4:89", "0.0.0.0")
	if err != nil {
		log.Fatal(err)
	}
	defer c.Close()

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		log.Fatal(err)
	}
	for _, ifi := range ifs {
		err := r.JoinGroup(ifi, &net.IPAddr{IP: AllSPFRouters})
		if err != nil {
			log.Fatal(err)
		}
		err = r.JoinGroup(ifi, &net.IPAddr{IP: AllDRouters})
		if err != nil {
			log.Fatal(err)
		}
	}

	hello := make([]byte, OSPFHelloHeaderLen)
	ospf := make([]byte, OSPFHeaderLen)
	ospf[0] = OSPF_VERSION
	ospf[1] = OSPF_TYPE_HELLO
	ospf = append(ospf, hello...)
	iph := &ipv4.Header{}
	iph.Version = ipv4.Version
	iph.Len = ipv4.HeaderLen
	iph.TOS = ipv4.DSCP_CS6
	iph.TotalLen = ipv4.HeaderLen + len(ospf)
	iph.TTL = 1
	iph.Protocol = 89
	iph.Dst = AllSPFRouters

	for _, ifi := range ifs {
		err := r.SetMulticastInterface(ifi)
		if err != nil {
			return
		}
		err = r.WriteTo(iph, ospf, nil)
		if err != nil {
			return
		}
	}
}

func TestReadWriteMulticastIPDatagram(t *testing.T) {
	if testing.Short() || !*testExternal {
		t.Skip("to avoid external network")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

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

	ifi := loopbackInterface()
	if ifi == nil {
		t.Skip("an appropriate interface not found")
	}
	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)
	}
	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.PacketConn.SetMulticastInterface failed: %v", err)
	}
	cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
	for i, toggle := range []bool{true, false, true} {
		wb, err := (&icmpMessage{
			Type: ipv4.ICMPTypeEcho, Code: 0,
			Body: &icmpEcho{
				ID: os.Getpid() & 0xffff, Seq: i + 1,
				Data: []byte("HELLO-R-U-THERE"),
			},
		}).Marshal()
		if err != nil {
			t.Fatalf("icmpMessage.Marshal failed: %v", err)
		}
		if err := r.SetControlMessage(cf, toggle); err != nil {
			t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
		}
		rb := writeThenReadDatagram(t, i, r, wb, nil, dst)
		m, err := parseICMPMessage(rb)
		if err != nil {
			t.Fatalf("parseICMPMessage failed: %v", err)
		}
		if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
			t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
		}
	}
}

func (rdns *RawDNS) DnsQuery(wg *sync.WaitGroup, config *config.Config, cm *chanman.ChanMan) {
	defer wg.Done()

	//set the IP headers
	rdns.IPHeaders.Src = rdns.LocalAddress
	rdns.IPHeaders.Dst = rdns.RemoteAddress
	rdns.IPHeaders.Protocol = IPProtoUDP
	rdns.IPHeaders.Len = IPHeaderLen
	rdns.IPHeaders.Version = 4
	rdns.IPHeaders.TTL = 128

	//set the query
	query := NewQuery()
	query.SetRequest(config.Query, "A")
	queryb := query.Marshal()

	//set the UDP headers
	rdns.UDPHeader.SetLen(8 + uint16(len(queryb)))
	rdns.UDPHeader.GenRandomSrcPort()
	rdns.UDPHeader.SetChecksum(0)
	udpHead, _ := rdns.UDPHeader.Marshal()

	//set the control message
	rdns.CtrlMsg.TTL = 128
	rdns.CtrlMsg.IfIndex = config.Interface.Index

	//ip on mac, ip4:udp for linux
	con, err := net.ListenPacket("ip4:udp", "0.0.0.0")
	if err != nil {
		log.Fatalln(err)
	}

	//new raw packet connection
	rawCon, err := ipv4.NewRawConn(con)
	if err != nil {
		log.Fatalln(err)
	}

	//set query
	//query := []byte{0x0d, 0x35, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x64, 0x61, 0x69, 0x73, 0x79, 0x06, 0x75, 0x62, 0x75, 0x6e, 0x74, 0x75, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, 0x00, 0x01}

	//set final payload

	//set packet length
	rdns.IPHeaders.TotalLen = 20 + len(queryb) + len(udpHead)
	rdns.Payload = make([]byte, 0)
	rdns.Payload = append(rdns.Payload, udpHead...)
	rdns.Payload = append(rdns.Payload, queryb...)

	rawCon.WriteTo(rdns.IPHeaders, rdns.Payload, rdns.CtrlMsg)
	cm.RunChan <- true
}

func TestIPPerInterfaceSingleRawConnWithSingleGroupListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if testing.Short() {
		t.Skip("to avoid external network")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

	gaddr := net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
	type ml struct {
		c   *ipv4.RawConn
		ifi *net.Interface
	}
	var mlt []*ml

	ift, err := net.Interfaces()
	if err != nil {
		t.Fatalf("net.Interfaces failed: %v", err)
	}
	for i, ifi := range ift {
		ip, ok := nettest.IsMulticastCapable("ip4", &ifi)
		if !ok {
			continue
		}
		c, err := net.ListenPacket("ip4:253", ip.String()) // unicast address
		if err != nil {
			t.Fatalf("net.ListenPacket with %v failed: %v", ip, err)
		}
		defer c.Close()
		r, err := ipv4.NewRawConn(c)
		if err != nil {
			t.Fatalf("ipv4.NewRawConn failed: %v", err)
		}
		if err := r.JoinGroup(&ifi, &gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
		}
		mlt = append(mlt, &ml{r, &ift[i]})
	}
	for _, m := range mlt {
		if err := m.c.LeaveGroup(m.ifi, &gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", m.ifi, err)
		}
	}
}

func TestIPPerInterfaceSingleConnWithSingleGroupListener(t *testing.T) {
	if testing.Short() || !*testExternal {
		t.Logf("skipping test to avoid external network")
		return
	}
	if os.Getuid() != 0 {
		t.Logf("skipping test; must be root")
		return
	}

	gaddr := &net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
	type ml struct {
		c   *ipv4.RawConn
		ifi *net.Interface
	}
	var mlt []*ml

	ift, err := net.Interfaces()
	if err != nil {
		t.Fatalf("net.Interfaces failed: %v", err)
	}
	for i, ifi := range ift {
		ip, ok := isGoodForMulticast(&ifi)
		if !ok {
			continue
		}
		// listen to a unicast interface address
		c, err := net.ListenPacket("ip4:253", ip.String()) // see RFC 4727
		if err != nil {
			t.Fatalf("net.ListenPacket with %v failed: %v", ip, err)
		}
		defer c.Close()
		r, err := ipv4.NewRawConn(c)
		if err != nil {
			t.Fatalf("ipv4.NewRawConn failed: %v", err)
		}
		if err := r.JoinGroup(&ifi, gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
		}
		mlt = append(mlt, &ml{r, &ift[i]})
	}
	for _, m := range mlt {
		if err := m.c.LeaveGroup(m.ifi, gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", m.ifi, err)
		}
	}
}

func TestReadWriteUnicastIPDatagram(t *testing.T) {
	if os.Getuid() != 0 {
		t.Logf("skipping test; must be root")
		return
	}

	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", "127.0.0.1")
	if err != nil {
		t.Fatalf("ResolveIPAddr failed: %v", err)
	}
	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.NewRawConn failed: %v", err)
	}
	cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
	for i, toggle := range []bool{true, false, true} {
		wb, err := (&icmpMessage{
			Type: icmpv4EchoRequest, Code: 0,
			Body: &icmpEcho{
				ID: os.Getpid() & 0xffff, Seq: i + 1,
				Data: []byte("HELLO-R-U-THERE"),
			},
		}).Marshal()
		if err != nil {
			t.Fatalf("icmpMessage.Marshal failed: %v", err)
		}
		if err := r.SetControlMessage(cf, toggle); err != nil {
			t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
		}
		rb := writeThenReadDatagram(t, i, r, wb, nil, dst)
		m, err := parseICMPMessage(rb)
		if err != nil {
			t.Fatalf("parseICMPMessage failed: %v", err)
		}
		if m.Type != icmpv4EchoReply || m.Code != 0 {
			t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, icmpv4EchoReply, 0)
		}
	}
}

func TestIPSingleRawConnWithSingleGroupListener(t *testing.T) {
	switch runtime.GOOS {
	case "plan9", "windows":
		t.Skipf("not supported on %q", runtime.GOOS)
	}
	if testing.Short() {
		t.Skip("to avoid external network")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

	c, err := net.ListenPacket("ip4:icmp", "0.0.0.0") // wildcard address
	if err != nil {
		t.Fatalf("net.ListenPacket failed: %v", err)
	}
	defer c.Close()

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.RawConn failed: %v", err)
	}
	gaddr := net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
	var mift []*net.Interface

	ift, err := net.Interfaces()
	if err != nil {
		t.Fatalf("net.Interfaces failed: %v", err)
	}
	for i, ifi := range ift {
		if _, ok := nettest.IsMulticastCapable("ip4", &ifi); !ok {
			continue
		}
		if err := r.JoinGroup(&ifi, &gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
		}
		mift = append(mift, &ift[i])
	}
	for _, ifi := range mift {
		if err := r.LeaveGroup(ifi, &gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", ifi, err)
		}
	}
}

func TestIPSingleConnWithSingleGroupListener(t *testing.T) {
	if testing.Short() || !*testExternal {
		t.Logf("skipping test to avoid external network")
		return
	}
	if os.Getuid() != 0 {
		t.Logf("skipping test; must be root")
		return
	}

	// listen to a wildcard address
	c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
	if err != nil {
		t.Fatalf("net.ListenPacket failed: %v", err)
	}
	defer c.Close()

	r, err := ipv4.NewRawConn(c)
	if err != nil {
		t.Fatalf("ipv4.RawConn failed: %v", err)
	}

	gaddr := &net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
	var mift []*net.Interface
	ift, err := net.Interfaces()
	if err != nil {
		t.Fatalf("net.Interfaces failed: %v", err)
	}
	for i, ifi := range ift {
		if _, ok := isGoodForMulticast(&ifi); !ok {
			continue
		}
		if err := r.JoinGroup(&ifi, gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
		}
		mift = append(mift, &ift[i])
	}
	for _, ifi := range mift {
		if err := r.LeaveGroup(ifi, gaddr); err != nil {
			t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", ifi, err)
		}
	}
}

func TestIPMulticastSockopt(t *testing.T) {
	if testing.Short() || !*testExternal {
		t.Skip("to avoid external network")
	}
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

	for _, tt := range multicastSockoptTests {
		c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
		if err != nil {
			t.Fatalf("net.ListenPacket failed: %v", err)
		}
		defer c.Close()

		r, _ := ipv4.NewRawConn(c)
		testMulticastSockopt(t, tt, r, &net.IPAddr{IP: tt.gaddr})
	}
}

func TestReadWriteMulticastIPDatagram(t *testing.T) {
	if testing.Short() || !*testExternal {
		t.Logf("skipping test to avoid external network")
		return
	}
	if os.Getuid() != 0 {
		t.Logf("skipping test; must be root")
		return
	}

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

	ifi := loopbackInterface()
	if ifi == nil {
		t.Logf("skipping test; an appropriate interface not found")
		return
	}
	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)
	}
	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.PacketConn.SetMulticastInterface failed: %v", err)
	}
	id := os.Getpid() & 0xffff
	pld := newICMPEchoRequest(id, 1, 128, []byte("HELLO-R-U-THERE"))
	runDatagramTransponder(t, r, pld, nil, dst)
}

func TestIPUnicastSockopt(t *testing.T) {
	if os.Getuid() != 0 {
		t.Skip("must be root")
	}

	for _, tt := range unicastSockoptTests {
		c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
		if err != nil {
			t.Errorf("net.ListenPacket failed: %v", err)
			return
		}
		defer c.Close()

		r, err := ipv4.NewRawConn(c)
		if err != nil {
			t.Errorf("ipv4.NewRawConn failed: %v", err)
			return
		}
		if err := testUnicastSockopt(t, tt, r); err != nil {
			break
		}
	}
}

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 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)
			}
		}
	}
}