Exemplo n.º 1
0
// TestGetAddr tests the MsgGetAddr API.
func TestGetAddr(t *testing.T) {
	pver := btcwire.ProtocolVersion

	// Ensure the command is expected value.
	wantCmd := "getaddr"
	msg := btcwire.NewMsgGetAddr()
	if cmd := msg.Command(); cmd != wantCmd {
		t.Errorf("NewMsgGetAddr: wrong command - got %v want %v",
			cmd, wantCmd)
	}

	// Ensure max payload is expected value for latest protocol version.
	// Num addresses (varInt) + max allowed addresses.
	wantPayload := uint32(0)
	maxPayload := msg.MaxPayloadLength(pver)
	if maxPayload != wantPayload {
		t.Errorf("MaxPayloadLength: wrong max payload length for "+
			"protocol version %d - got %v, want %v", pver,
			maxPayload, wantPayload)
	}

	return
}
Exemplo n.º 2
0
func connHandler(id int, outAddrs chan<- []*btc.NetAddress, outNode chan<- Node, inAddr <-chan *btc.NetAddress) {
	// A worker that deals with the connection to a single bitcoin node.
	// It writes the list of nodes reported by node into out.
	// It also writes a valid node into outNode.
	// It reads from inAddr everytime it closes a connection

	for {
		addr := <-inAddr
		strA := addressFmt(*addr)

		threadLog := func(reported LogLevel, msg string) {
			if reported <= Level {
				logger.Printf("[%d] %s: %s\n", id, strA, msg)
			}
		}
		connProtoVer := btc.ProtocolVersion
		write := composeWrite(threadLog, connProtoVer)

		conn, err := net.DialTimeout("tcp", strA, time.Millisecond*500)
		if err != nil {
			threadLog(Log, err.Error())
			continue
		}
		threadLog(Info, "Connected")

		ver_m, _ := btc.NewMsgVersionFromConn(conn, genNonce(), 0)
		ver_m.AddUserAgent("btcmonitor", "0.0.1")
		write(conn, ver_m)

		// We are looking for successful addr messages
		wins := 0
		// After 10 seconds we just close the conn and handle errors
		time.AfterFunc(time.Second*10, func() { conn.Close() })
	MessageLoop:
		for {
			var resp btc.Message
			resp, _, err := btc.ReadMessage(conn, connProtoVer, btcnet)
			if err != nil {
				threadLog(Log, err.Error())
				break MessageLoop
			}
			threadLog(Info, resp.Command())
			switch resp := resp.(type) {
			case *btc.MsgVersion:
				nodePVer := uint32(resp.ProtocolVersion)
				if nodePVer < connProtoVer {
					connProtoVer = nodePVer
					write = composeWrite(threadLog, connProtoVer)
				}
				node := convNode(*addr, *resp)
				outNode <- node
				verack := btc.NewMsgVerAck()
				write(conn, verack)
				getAddr := btc.NewMsgGetAddr()
				write(conn, getAddr)
			case *btc.MsgAddr:
				wins += 1
				addrs := resp.AddrList
				outAddrs <- addrs
				if wins == 3 {
					break MessageLoop
				}
			case *btc.MsgPing:
				nonce := resp.Nonce
				pong := btc.NewMsgPong(nonce)
				write(conn, pong)
			}
		}
	}
}
Exemplo n.º 3
0
// TestGetAddrWire tests the MsgGetAddr wire encode and decode for various
// protocol versions.
func TestGetAddrWire(t *testing.T) {
	msgGetAddr := btcwire.NewMsgGetAddr()
	msgGetAddrEncoded := []byte{}

	tests := []struct {
		in   *btcwire.MsgGetAddr // Message to encode
		out  *btcwire.MsgGetAddr // Expected decoded message
		buf  []byte              // Wire encoding
		pver uint32              // Protocol version for wire encoding
	}{
		// Latest protocol version.
		{
			msgGetAddr,
			msgGetAddr,
			msgGetAddrEncoded,
			btcwire.ProtocolVersion,
		},

		// Protocol version BIP0035Version.
		{
			msgGetAddr,
			msgGetAddr,
			msgGetAddrEncoded,
			btcwire.BIP0035Version,
		},

		// Protocol version BIP0031Version.
		{
			msgGetAddr,
			msgGetAddr,
			msgGetAddrEncoded,
			btcwire.BIP0031Version,
		},

		// Protocol version NetAddressTimeVersion.
		{
			msgGetAddr,
			msgGetAddr,
			msgGetAddrEncoded,
			btcwire.NetAddressTimeVersion,
		},

		// Protocol version MultipleAddressVersion.
		{
			msgGetAddr,
			msgGetAddr,
			msgGetAddrEncoded,
			btcwire.MultipleAddressVersion,
		},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode the message to wire format.
		var buf bytes.Buffer
		err := test.in.BtcEncode(&buf, test.pver)
		if err != nil {
			t.Errorf("BtcEncode #%d error %v", i, err)
			continue
		}
		if !bytes.Equal(buf.Bytes(), test.buf) {
			t.Errorf("BtcEncode #%d\n got: %s want: %s", i,
				spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
			continue
		}

		// Decode the message from wire format.
		var msg btcwire.MsgGetAddr
		rbuf := bytes.NewBuffer(test.buf)
		err = msg.BtcDecode(rbuf, test.pver)
		if err != nil {
			t.Errorf("BtcDecode #%d error %v", i, err)
			continue
		}
		if !reflect.DeepEqual(&msg, test.out) {
			t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
				spew.Sdump(msg), spew.Sdump(test.out))
			continue
		}
	}
}
Exemplo n.º 4
0
// handleVersionMsg is invoked when a peer receives a version bitcoin message
// and is used to negotiate the protocol version details as well as kick start
// the communications.
func (p *peer) handleVersionMsg(msg *btcwire.MsgVersion) {
	// Detect self connections.
	if msg.Nonce == p.server.nonce {
		log.Debugf("PEER: Disconnecting peer connected to self %s",
			p.addr)
		p.Disconnect()
		return
	}

	// Limit to one version message per peer.
	if p.versionKnown {
		p.logError("PEER: Only one version message per peer is allowed %s.",
			p.addr)
		p.Disconnect()
		return
	}

	// Negotiate the protocol version.
	p.protocolVersion = minUint32(p.protocolVersion, uint32(msg.ProtocolVersion))
	p.versionKnown = true
	log.Debugf("PEER: Negotiated protocol version %d for peer %s",
		p.protocolVersion, p.addr)
	p.lastBlock = msg.LastBlock

	// Set the supported services for the peer to what the remote peer
	// advertised.
	p.services = msg.Services

	// Set the remote peer's user agent.
	p.userAgent = msg.UserAgent

	// Inbound connections.
	if p.inbound {
		// Send version.
		err := p.pushVersionMsg()
		if err != nil {
			p.logError("PEER: Can't send version message: %v", err)
			p.Disconnect()
			return
		}
	}

	// Set up a NetAddress for the peer to be used with AddrManager.
	na, err := newNetAddress(p.conn.RemoteAddr(), p.services)
	if err != nil {
		p.logError("PEER: Can't get remote address: %v", err)
		p.Disconnect()
		return
	}
	p.na = na

	// Send verack.
	p.QueueMessage(btcwire.NewMsgVerAck(), nil)

	// Outbound connections.
	if !p.inbound {
		// TODO(davec): Only do this if not doing the initial block
		// download and the local address is routable.
		if !cfg.DisableListen {
			// Advertise the local address.
			na, err := newNetAddress(p.conn.LocalAddr(), p.services)
			if err != nil {
				p.logError("PEER: Can't advertise local "+
					"address: %v", err)
				p.Disconnect()
				return
			}
			addresses := []*btcwire.NetAddress{na}
			p.pushAddrMsg(addresses)
		}

		// Request known addresses if the server address manager needs
		// more and the peer has a protocol version new enough to
		// include a timestamp with addresses.
		hasTimestamp := p.protocolVersion >= btcwire.NetAddressTimeVersion
		if p.server.addrManager.NeedMoreAddresses() && hasTimestamp {
			p.QueueMessage(btcwire.NewMsgGetAddr(), nil)
		}

		// Mark the address as a known good address.
		p.server.addrManager.Good(p.na)
	} else {
		// A peer might not be advertising the same address that it
		// actually connected from.  One example of why this can happen
		// is with NAT.  Only add the address to the address manager if
		// the addresses agree.
		if NetAddressKey(&msg.AddrMe) == NetAddressKey(p.na) {
			p.server.addrManager.AddAddress(p.na, p.na)
			p.server.addrManager.Good(p.na)
		}
	}

	// Signal the block manager this peer is a new sync candidate.
	p.server.blockManager.NewPeer(p)

	// TODO: Relay alerts.
}
Exemplo n.º 5
0
// TestMessage tests the Read/WriteMessage API.
func TestMessage(t *testing.T) {
	pver := btcwire.ProtocolVersion

	// Create the various types of messages to test.

	// MsgVersion.
	addrYou := &net.TCPAddr{IP: net.ParseIP("192.168.0.1"), Port: 8333}
	you, err := btcwire.NewNetAddress(addrYou, btcwire.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 := btcwire.NewNetAddress(addrMe, btcwire.SFNodeNetwork)
	if err != nil {
		t.Errorf("NewNetAddress: %v", err)
	}
	me.Timestamp = time.Time{} // Version message has zero value timestamp.
	msgVersion := btcwire.NewMsgVersion(me, you, 123123, "/test:0.0.1/", 0)

	msgVerack := btcwire.NewMsgVerAck()
	msgGetAddr := btcwire.NewMsgGetAddr()
	msgAddr := btcwire.NewMsgAddr()
	msgGetBlocks := btcwire.NewMsgGetBlocks(&btcwire.ShaHash{})
	msgBlock := &blockOne
	msgInv := btcwire.NewMsgInv()
	msgGetData := btcwire.NewMsgGetData()
	msgNotFound := btcwire.NewMsgNotFound()
	msgTx := btcwire.NewMsgTx()
	msgPing := btcwire.NewMsgPing(123123)
	msgPong := btcwire.NewMsgPong(123123)
	msgGetHeaders := btcwire.NewMsgGetHeaders()
	msgHeaders := btcwire.NewMsgHeaders()
	msgAlert := btcwire.NewMsgAlert("payload", "signature")
	msgMemPool := btcwire.NewMsgMemPool()

	tests := []struct {
		in     btcwire.Message    // Value to encode
		out    btcwire.Message    // Expected decoded value
		pver   uint32             // Protocol version for wire encoding
		btcnet btcwire.BitcoinNet // Network to use for wire encoding
	}{
		{msgVersion, msgVersion, pver, btcwire.MainNet},
		{msgVerack, msgVerack, pver, btcwire.MainNet},
		{msgGetAddr, msgGetAddr, pver, btcwire.MainNet},
		{msgAddr, msgAddr, pver, btcwire.MainNet},
		{msgGetBlocks, msgGetBlocks, pver, btcwire.MainNet},
		{msgBlock, msgBlock, pver, btcwire.MainNet},
		{msgInv, msgInv, pver, btcwire.MainNet},
		{msgGetData, msgGetData, pver, btcwire.MainNet},
		{msgNotFound, msgNotFound, pver, btcwire.MainNet},
		{msgTx, msgTx, pver, btcwire.MainNet},
		{msgPing, msgPing, pver, btcwire.MainNet},
		{msgPong, msgPong, pver, btcwire.MainNet},
		{msgGetHeaders, msgGetHeaders, pver, btcwire.MainNet},
		{msgHeaders, msgHeaders, pver, btcwire.MainNet},
		{msgAlert, msgAlert, pver, btcwire.MainNet},
		{msgMemPool, msgMemPool, pver, btcwire.MainNet},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		var buf bytes.Buffer
		err := btcwire.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.NewBuffer(buf.Bytes())
		msg, _, err := btcwire.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
		}
	}
}