Example #1
0
func (s *SPVCon) incomingMessageHandler() {
	for {
		n, xm, _, err := wire.ReadMessageN(s.con, s.localVersion, s.TS.Param.Net)
		if err != nil {
			log.Printf("ReadMessageN error.  Disconnecting: %s\n", err.Error())
			return
		}
		s.RBytes += uint64(n)
		//		log.Printf("Got %d byte %s message\n", n, xm.Command())
		switch m := xm.(type) {
		case *wire.MsgVersion:
			log.Printf("Got version message.  Agent %s, version %d, at height %d\n",
				m.UserAgent, m.ProtocolVersion, m.LastBlock)
			s.remoteVersion = uint32(m.ProtocolVersion) // weird cast! bug?
		case *wire.MsgVerAck:
			log.Printf("Got verack.  Whatever.\n")
		case *wire.MsgAddr:
			log.Printf("got %d addresses.\n", len(m.AddrList))
		case *wire.MsgPing:
			// log.Printf("Got a ping message.  We should pong back or they will kick us off.")
			go s.PongBack(m.Nonce)
		case *wire.MsgPong:
			log.Printf("Got a pong response. OK.\n")
		case *wire.MsgBlock:
			s.IngestBlock(m)
		case *wire.MsgMerkleBlock:
			s.IngestMerkleBlock(m)
		case *wire.MsgHeaders: // concurrent because we keep asking for blocks
			go s.HeaderHandler(m)
		case *wire.MsgTx: // not concurrent! txs must be in order
			s.TxHandler(m)
		case *wire.MsgReject:
			log.Printf("Rejected! cmd: %s code: %s tx: %s reason: %s",
				m.Cmd, m.Code.String(), m.Hash.String(), m.Reason)
		case *wire.MsgInv:
			s.InvHandler(m)
		case *wire.MsgNotFound:
			log.Printf("Got not found response from remote:")
			for i, thing := range m.InvList {
				log.Printf("\t$d) %s: %s", i, thing.Type, thing.Hash)
			}
		case *wire.MsgGetData:
			s.GetDataHandler(m)

		default:
			log.Printf("Got unknown message type %s\n", m.Command())
		}
	}
	return
}
Example #2
0
func (s *SPVCon) Open(remoteNode string, hfn string, inTs *TxStore) error {
	// open header file
	err := s.openHeaderFile(headerFileName)
	if err != nil {
		return err
	}

	// open TCP connection
	s.con, err = net.Dial("tcp", remoteNode)
	if err != nil {
		return err
	}

	s.localVersion = VERSION
	s.netType = NETVERSION

	s.TS = inTs

	myMsgVer, err := wire.NewMsgVersionFromConn(s.con, 0, 0)
	if err != nil {
		return err
	}
	err = myMsgVer.AddUserAgent("test", "zero")
	if err != nil {
		return err
	}
	// must set this to enable SPV stuff
	myMsgVer.AddService(wire.SFNodeBloom)

	// this actually sends
	n, err := wire.WriteMessageN(s.con, myMsgVer, s.localVersion, s.netType)
	if err != nil {
		return err
	}
	s.WBytes += uint64(n)
	log.Printf("wrote %d byte version message to %s\n",
		n, s.con.RemoteAddr().String())

	n, m, b, err := wire.ReadMessageN(s.con, s.localVersion, s.netType)
	if err != nil {
		return err
	}
	s.RBytes += uint64(n)
	log.Printf("got %d byte response %x\n command: %s\n", n, b, m.Command())

	mv, ok := m.(*wire.MsgVersion)
	if ok {
		log.Printf("connected to %s", mv.UserAgent)
	}

	log.Printf("remote reports version %x (dec %d)\n",
		mv.ProtocolVersion, mv.ProtocolVersion)

	mva := wire.NewMsgVerAck()
	n, err = wire.WriteMessageN(s.con, mva, s.localVersion, s.netType)
	if err != nil {
		return err
	}
	s.WBytes += uint64(n)

	s.inMsgQueue = make(chan wire.Message)
	go s.incomingMessageHandler()
	s.outMsgQueue = make(chan wire.Message)
	go s.outgoingMessageHandler()

	return nil
}
Example #3
0
func (s *SPVCon) incomingMessageHandler() {
	for {
		n, xm, _, err := wire.ReadMessageN(s.con, s.localVersion, s.netType)
		if err != nil {
			log.Printf("ReadMessageN error.  Disconnecting: %s\n", err.Error())
			return
		}
		s.RBytes += uint64(n)
		//		log.Printf("Got %d byte %s message\n", n, xm.Command())
		switch m := xm.(type) {
		case *wire.MsgVersion:
			log.Printf("Got version message.  Agent %s, version %d, at height %d\n",
				m.UserAgent, m.ProtocolVersion, m.LastBlock)
			s.remoteVersion = uint32(m.ProtocolVersion) // weird cast! bug?
		case *wire.MsgVerAck:
			log.Printf("Got verack.  Whatever.\n")
		case *wire.MsgAddr:
			log.Printf("got %d addresses.\n", len(m.AddrList))
		case *wire.MsgPing:
			log.Printf("Got a ping message.  We should pong back or they will kick us off.")
			s.PongBack(m.Nonce)
		case *wire.MsgPong:
			log.Printf("Got a pong response. OK.\n")
		case *wire.MsgMerkleBlock:

			//			log.Printf("Got merkle block message. Will verify.\n")
			//			fmt.Printf("%d flag bytes, %d txs, %d hashes",
			//				len(m.Flags), m.Transactions, len(m.Hashes))
			txids, err := checkMBlock(m)
			if err != nil {
				log.Printf("Merkle block error: %s\n", err.Error())
				return
				//				continue
			}
			fmt.Printf(" got %d txs ", len(txids))
			//			fmt.Printf(" = got %d txs from block %s\n",
			//				len(txids), m.Header.BlockSha().String())
			for _, txid := range txids {
				err := s.TS.AddTxid(txid)
				if err != nil {
					log.Printf("Txid store error: %s\n", err.Error())
				}
			}
			//			nextReq <- true

		case *wire.MsgHeaders:
			moar, err := s.IngestHeaders(m)
			if err != nil {
				log.Printf("Header error: %s\n", err.Error())
				return
			}
			if moar {
				s.AskForHeaders()
			}
		case *wire.MsgTx:
			err := s.TS.IngestTx(m)
			if err != nil {
				log.Printf("Incoming Tx error: %s\n", err.Error())
			}
			//			log.Printf("Got tx %s\n", m.TxSha().String())
		default:
			log.Printf("Got unknown message type %s\n", m.Command())
		}
	}
	return
}
Example #4
0
// TestMessage tests the Read/WriteMessage and Read/WriteMessageN API.
func TestMessage(t *testing.T) {
	pver := wire.ProtocolVersion

	// Create the various types of messages to test.

	// MsgVersion.
	addrYou := &net.TCPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333}
	you, err := wire.NewNetAddress(addrYou, wire.SFNodeNetwork)
	if err != nil {
		t.Errorf("NewNetAddress: %v", err)
	}
	you.Timestamp = time.Time{} // Version message has zero value timestamp.
	addrMe := &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8333}
	me, err := wire.NewNetAddress(addrMe, wire.SFNodeNetwork)
	if err != nil {
		t.Errorf("NewNetAddress: %v", err)
	}
	me.Timestamp = time.Time{} // Version message has zero value timestamp.
	msgVersion := wire.NewMsgVersion(me, you, 123123, 0)

	msgVerack := wire.NewMsgVerAck()
	msgGetAddr := wire.NewMsgGetAddr()
	msgAddr := wire.NewMsgAddr()
	msgGetBlocks := wire.NewMsgGetBlocks(&wire.ShaHash{})
	msgBlock := &blockOne
	msgInv := wire.NewMsgInv()
	msgGetData := wire.NewMsgGetData()
	msgNotFound := wire.NewMsgNotFound()
	msgTx := wire.NewMsgTx()
	msgPing := wire.NewMsgPing(123123)
	msgPong := wire.NewMsgPong(123123)
	msgGetHeaders := wire.NewMsgGetHeaders()
	msgHeaders := wire.NewMsgHeaders()
	msgAlert := wire.NewMsgAlert([]byte("payload"), []byte("signature"))
	msgMemPool := wire.NewMsgMemPool()
	msgFilterAdd := wire.NewMsgFilterAdd([]byte{0x01})
	msgFilterClear := wire.NewMsgFilterClear()
	msgFilterLoad := wire.NewMsgFilterLoad([]byte{0x01}, 10, 0, wire.BloomUpdateNone)
	bh := wire.NewBlockHeader(&wire.ShaHash{}, &wire.ShaHash{}, 0, 0)
	msgMerkleBlock := wire.NewMsgMerkleBlock(bh)
	msgReject := wire.NewMsgReject("block", wire.RejectDuplicate, "duplicate block")

	tests := []struct {
		in     wire.Message    // Value to encode
		out    wire.Message    // Expected decoded value
		pver   uint32          // Protocol version for wire encoding
		btcnet wire.BitcoinNet // Network to use for wire encoding
		bytes  int             // Expected num bytes read/written
	}{
		{msgVersion, msgVersion, pver, wire.MainNet, 125},
		{msgVerack, msgVerack, pver, wire.MainNet, 24},
		{msgGetAddr, msgGetAddr, pver, wire.MainNet, 24},
		{msgAddr, msgAddr, pver, wire.MainNet, 25},
		{msgGetBlocks, msgGetBlocks, pver, wire.MainNet, 61},
		{msgBlock, msgBlock, pver, wire.MainNet, 239},
		{msgInv, msgInv, pver, wire.MainNet, 25},
		{msgGetData, msgGetData, pver, wire.MainNet, 25},
		{msgNotFound, msgNotFound, pver, wire.MainNet, 25},
		{msgTx, msgTx, pver, wire.MainNet, 34},
		{msgPing, msgPing, pver, wire.MainNet, 32},
		{msgPong, msgPong, pver, wire.MainNet, 32},
		{msgGetHeaders, msgGetHeaders, pver, wire.MainNet, 61},
		{msgHeaders, msgHeaders, pver, wire.MainNet, 25},
		{msgAlert, msgAlert, pver, wire.MainNet, 42},
		{msgMemPool, msgMemPool, pver, wire.MainNet, 24},
		{msgFilterAdd, msgFilterAdd, pver, wire.MainNet, 26},
		{msgFilterClear, msgFilterClear, pver, wire.MainNet, 24},
		{msgFilterLoad, msgFilterLoad, pver, wire.MainNet, 35},
		{msgMerkleBlock, msgMerkleBlock, pver, wire.MainNet, 110},
		{msgReject, msgReject, pver, wire.MainNet, 79},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		var buf bytes.Buffer
		nw, err := wire.WriteMessageN(&buf, test.in, test.pver, test.btcnet)
		if err != nil {
			t.Errorf("WriteMessage #%d error %v", i, err)
			continue
		}

		// Ensure the number of bytes written match the expected value.
		if nw != test.bytes {
			t.Errorf("WriteMessage #%d unexpected num bytes "+
				"written - got %d, want %d", i, nw, test.bytes)
		}

		// Decode from wire format.
		rbuf := bytes.NewReader(buf.Bytes())
		nr, msg, _, err := wire.ReadMessageN(rbuf, test.pver, test.btcnet)
		if err != nil {
			t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
				spew.Sdump(msg))
			continue
		}
		if !reflect.DeepEqual(msg, test.out) {
			t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
				spew.Sdump(msg), spew.Sdump(test.out))
			continue
		}

		// Ensure the number of bytes read match the expected value.
		if nr != test.bytes {
			t.Errorf("ReadMessage #%d unexpected num bytes read - "+
				"got %d, want %d", i, nr, test.bytes)
		}
	}

	// Do the same thing for Read/WriteMessage, but ignore the bytes since
	// they don't return them.
	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		var buf bytes.Buffer
		err := wire.WriteMessage(&buf, test.in, test.pver, test.btcnet)
		if err != nil {
			t.Errorf("WriteMessage #%d error %v", i, err)
			continue
		}

		// Decode from wire format.
		rbuf := bytes.NewReader(buf.Bytes())
		msg, _, err := wire.ReadMessage(rbuf, test.pver, test.btcnet)
		if err != nil {
			t.Errorf("ReadMessage #%d error %v, msg %v", i, err,
				spew.Sdump(msg))
			continue
		}
		if !reflect.DeepEqual(msg, test.out) {
			t.Errorf("ReadMessage #%d\n got: %v want: %v", i,
				spew.Sdump(msg), spew.Sdump(test.out))
			continue
		}
	}
}
Example #5
0
// TestReadMessageWireErrors performs negative tests against wire decoding into
// concrete messages to confirm error paths work correctly.
func TestReadMessageWireErrors(t *testing.T) {
	pver := wire.ProtocolVersion
	btcnet := wire.MainNet

	// Ensure message errors are as expected with no function specified.
	wantErr := "something bad happened"
	testErr := wire.MessageError{Description: wantErr}
	if testErr.Error() != wantErr {
		t.Errorf("MessageError: wrong error - got %v, want %v",
			testErr.Error(), wantErr)
	}

	// Ensure message errors are as expected with a function specified.
	wantFunc := "foo"
	testErr = wire.MessageError{Func: wantFunc, Description: wantErr}
	if testErr.Error() != wantFunc+": "+wantErr {
		t.Errorf("MessageError: wrong error - got %v, want %v",
			testErr.Error(), wantErr)
	}

	// Wire encoded bytes for main and testnet3 networks magic identifiers.
	testNet3Bytes := makeHeader(wire.TestNet3, "", 0, 0)

	// Wire encoded bytes for a message that exceeds max overall message
	// length.
	mpl := uint32(wire.MaxMessagePayload)
	exceedMaxPayloadBytes := makeHeader(btcnet, "getaddr", mpl+1, 0)

	// Wire encoded bytes for a command which is invalid utf-8.
	badCommandBytes := makeHeader(btcnet, "bogus", 0, 0)
	badCommandBytes[4] = 0x81

	// Wire encoded bytes for a command which is valid, but not supported.
	unsupportedCommandBytes := makeHeader(btcnet, "bogus", 0, 0)

	// Wire encoded bytes for a message which exceeds the max payload for
	// a specific message type.
	exceedTypePayloadBytes := makeHeader(btcnet, "getaddr", 1, 0)

	// Wire encoded bytes for a message which does not deliver the full
	// payload according to the header length.
	shortPayloadBytes := makeHeader(btcnet, "version", 115, 0)

	// Wire encoded bytes for a message with a bad checksum.
	badChecksumBytes := makeHeader(btcnet, "version", 2, 0xbeef)
	badChecksumBytes = append(badChecksumBytes, []byte{0x0, 0x0}...)

	// Wire encoded bytes for a message which has a valid header, but is
	// the wrong format.  An addr starts with a varint of the number of
	// contained in the message.  Claim there is two, but don't provide
	// them.  At the same time, forge the header fields so the message is
	// otherwise accurate.
	badMessageBytes := makeHeader(btcnet, "addr", 1, 0xeaadc31c)
	badMessageBytes = append(badMessageBytes, 0x2)

	// Wire encoded bytes for a message which the header claims has 15k
	// bytes of data to discard.
	discardBytes := makeHeader(btcnet, "bogus", 15*1024, 0)

	tests := []struct {
		buf     []byte          // Wire encoding
		pver    uint32          // Protocol version for wire encoding
		btcnet  wire.BitcoinNet // Bitcoin network for wire encoding
		max     int             // Max size of fixed buffer to induce errors
		readErr error           // Expected read error
		bytes   int             // Expected num bytes read
	}{
		// Latest protocol version with intentional read errors.

		// Short header.
		{
			[]byte{},
			pver,
			btcnet,
			0,
			io.EOF,
			0,
		},

		// Wrong network.  Want MainNet, but giving TestNet3.
		{
			testNet3Bytes,
			pver,
			btcnet,
			len(testNet3Bytes),
			&wire.MessageError{},
			24,
		},

		// Exceed max overall message payload length.
		{
			exceedMaxPayloadBytes,
			pver,
			btcnet,
			len(exceedMaxPayloadBytes),
			&wire.MessageError{},
			24,
		},

		// Invalid UTF-8 command.
		{
			badCommandBytes,
			pver,
			btcnet,
			len(badCommandBytes),
			&wire.MessageError{},
			24,
		},

		// Valid, but unsupported command.
		{
			unsupportedCommandBytes,
			pver,
			btcnet,
			len(unsupportedCommandBytes),
			&wire.MessageError{},
			24,
		},

		// Exceed max allowed payload for a message of a specific type.
		{
			exceedTypePayloadBytes,
			pver,
			btcnet,
			len(exceedTypePayloadBytes),
			&wire.MessageError{},
			24,
		},

		// Message with a payload shorter than the header indicates.
		{
			shortPayloadBytes,
			pver,
			btcnet,
			len(shortPayloadBytes),
			io.EOF,
			24,
		},

		// Message with a bad checksum.
		{
			badChecksumBytes,
			pver,
			btcnet,
			len(badChecksumBytes),
			&wire.MessageError{},
			26,
		},

		// Message with a valid header, but wrong format.
		{
			badMessageBytes,
			pver,
			btcnet,
			len(badMessageBytes),
			io.EOF,
			25,
		},

		// 15k bytes of data to discard.
		{
			discardBytes,
			pver,
			btcnet,
			len(discardBytes),
			&wire.MessageError{},
			24,
		},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Decode from wire format.
		r := newFixedReader(test.max, test.buf)
		nr, _, _, err := wire.ReadMessageN(r, test.pver, test.btcnet)
		if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
			t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
				"want: %T", i, err, err, test.readErr)
			continue
		}

		// Ensure the number of bytes written match the expected value.
		if nr != test.bytes {
			t.Errorf("ReadMessage #%d unexpected num bytes read - "+
				"got %d, want %d", i, nr, test.bytes)
		}

		// For errors which are not of type wire.MessageError, check
		// them for equality.
		if _, ok := err.(*wire.MessageError); !ok {
			if err != test.readErr {
				t.Errorf("ReadMessage #%d wrong error got: %v <%T>, "+
					"want: %v <%T>", i, err, err,
					test.readErr, test.readErr)
				continue
			}
		}
	}
}
Example #6
0
File: init.go Project: conseweb/lnd
// OpenPV starts a
func OpenSPV(remoteNode string, hfn, dbfn string,
	inTs *TxStore, hard bool, iron bool, p *chaincfg.Params) (SPVCon, error) {
	// create new SPVCon
	var s SPVCon
	s.HardMode = hard
	s.Ironman = iron
	// I should really merge SPVCon and TxStore, they're basically the same
	inTs.Param = p
	s.TS = inTs // copy pointer of txstore into spvcon

	// open header file
	err := s.openHeaderFile(hfn)
	if err != nil {
		return s, err
	}
	// open TCP connection
	s.con, err = net.Dial("tcp", remoteNode)
	if err != nil {
		return s, err
	}
	// assign version bits for local node
	s.localVersion = VERSION
	// transaction store for this SPV connection
	err = inTs.OpenDB(dbfn)
	if err != nil {
		return s, err
	}
	myMsgVer, err := wire.NewMsgVersionFromConn(s.con, 0, 0)
	if err != nil {
		return s, err
	}
	err = myMsgVer.AddUserAgent("test", "zero")
	if err != nil {
		return s, err
	}
	// must set this to enable SPV stuff
	myMsgVer.AddService(wire.SFNodeBloom)
	// this actually sends
	n, err := wire.WriteMessageN(s.con, myMsgVer, s.localVersion, s.TS.Param.Net)
	if err != nil {
		return s, err
	}
	s.WBytes += uint64(n)
	log.Printf("wrote %d byte version message to %s\n",
		n, s.con.RemoteAddr().String())
	n, m, b, err := wire.ReadMessageN(s.con, s.localVersion, s.TS.Param.Net)
	if err != nil {
		return s, err
	}
	s.RBytes += uint64(n)
	log.Printf("got %d byte response %x\n command: %s\n", n, b, m.Command())

	mv, ok := m.(*wire.MsgVersion)
	if ok {
		log.Printf("connected to %s", mv.UserAgent)
	}
	log.Printf("remote reports version %x (dec %d)\n",
		mv.ProtocolVersion, mv.ProtocolVersion)

	// set remote height
	s.remoteHeight = mv.LastBlock
	mva := wire.NewMsgVerAck()
	n, err = wire.WriteMessageN(s.con, mva, s.localVersion, s.TS.Param.Net)
	if err != nil {
		return s, err
	}
	s.WBytes += uint64(n)

	s.inMsgQueue = make(chan wire.Message)
	go s.incomingMessageHandler()
	s.outMsgQueue = make(chan wire.Message)
	go s.outgoingMessageHandler()
	s.blockQueue = make(chan HashAndHeight, 32) // queue depth 32 is a thing
	s.fPositives = make(chan int32, 4000)       // a block full, approx
	s.inWaitState = make(chan bool, 1)
	go s.fPositiveHandler()

	return s, nil
}