public void TestVerack()
{
var bs = new BitcoinSerializer(NetworkParameters.ProdNet(), false);
// the actual data from https://en.bitcoin.it/wiki/Protocol_specification#verack
using (var bais = new MemoryStream(Hex.Decode("f9beb4d976657261636b00000000000000000000")))
{
bs.Deserialize(bais);
}
}
public void TestVersion()
{
var bs = new BitcoinSerializer(NetworkParameters.ProdNet(), false);
// the actual data from https://en.bitcoin.it/wiki/Protocol_specification#version
using (var bais = new MemoryStream(Hex.Decode("f9beb4d976657273696f6e0000000000550000009" +
"c7c00000100000000000000e615104d00000000010000000000000000000000000000000000ffff0a000001daf6010000" +
"000000000000000000000000000000ffff0a000002208ddd9d202c3ab457130055810100")))
{
var vm = (VersionMessage) bs.Deserialize(bais);
Assert.AreEqual(31900U, vm.ClientVersion);
Assert.AreEqual(1292899814UL, vm.Time);
Assert.AreEqual(98645U, vm.BestHeight);
}
}
public void TestAddr()
{
var bs = new BitcoinSerializer(NetworkParameters.ProdNet(), true);
// the actual data from https://en.bitcoin.it/wiki/Protocol_specification#addr
using (var bais = new MemoryStream(Hex.Decode("f9beb4d96164647200000000000000001f000000" +
"ed52399b01e215104d010000000000000000000000000000000000ffff0a000001208d")))
{
var a = (AddressMessage) bs.Deserialize(bais);
Assert.AreEqual(1, a.Addresses.Count);
var pa = a.Addresses[0];
Assert.AreEqual(8333, pa.Port);
Assert.AreEqual("10.0.0.1", pa.Addr.ToString());
}
}
/// <summary>
/// Connect to the given IP address using the port specified as part of the network parameters. Once construction
/// is complete a functioning network channel is set up and running.
/// </summary>
/// <param name="peerAddress">IP address to connect to. IPv6 is not currently supported by BitCoin. If port is not positive the default port from params is used.</param>
/// <param name="networkParameters">Defines which network to connect to and details of the protocol.</param>
/// <param name="bestHeight">How many blocks are in our best chain</param>
/// <param name="connectTimeout">Timeout in milliseconds when initially connecting to peer</param>
/// <exception cref="IOException">If there is a network related failure.</exception>
/// <exception cref="ProtocolException">If the version negotiation failed.</exception>
public NetworkConnection(PeerAddress peerAddress, NetworkParameters networkParameters, uint bestHeight,
int connectTimeout = 60000)
{
_networkParameters = networkParameters;
_remoteIp = peerAddress.IpAddress;
var port = (peerAddress.Port > 0) ? peerAddress.Port : networkParameters.Port;
var address = new IPEndPoint(_remoteIp, port);
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_socket.Connect(address);
_socket.SendTimeout = _socket.ReceiveTimeout = connectTimeout;
_outputStream = new NetworkStream(_socket, FileAccess.Write);
_inputStream = new NetworkStream(_socket, FileAccess.Read);
// the version message never uses check-summing. Update check-summing property after version is read.
_serializer = new BitcoinSerializer(networkParameters);
// Announce ourselves. This has to come first to connect to clients beyond v0.30.20.2 which wait to hear
// from us until they send their version message back.
var versionMessage = new VersionMessage(networkParameters, bestHeight);
//Log.DebugFormat("Version Message: {0}", versionMessage);
WriteMessage(versionMessage);
//Log.Debug("Sent version message. Now we should read the ack from the peer.");
VersionMessage versionMessageFromPeer;
while ((versionMessage = ReadMessage() as VersionMessage)==null)
{
}
Log.Info("WE HAVE A VERSION MESSAGE!");
// When connecting, the remote peer sends us a version message with various bits of
// useful data in it. We need to know the peer protocol version before we can talk to it.
_versionMessage = (VersionMessage) versionMessage;
//Log.Debug("read message of type version.");
Log.Debug(_versionMessage);
// Now it's our turn ...
// Send an ACK message stating we accept the peers protocol version.
WriteMessage(new VersionAckMessage());
// And get one back ...
ReadMessage();
// Switch to the new protocol version.
var peerVersion = _versionMessage.ClientVersion;
Log.InfoFormat("Connected to peer: version={0}, subVer='{1}', services=0x{2:X}, time={3}, blocks={4}",
peerVersion,
_versionMessage.SubVersion,
_versionMessage.LocalServices,
UnixTime.FromUnixTime(_versionMessage.Time),
_versionMessage.BestHeight
);
// BitcoinSharp is a client mode implementation. That means there's not much point in us talking to other client
// mode nodes because we can't download the data from them we need to find/verify transactions.
if (!_versionMessage.HasBlockChain())
{
// Shut down the socket
try
{
Shutdown();
}
catch (IOException)
{
// ignore exceptions while aborting
}
throw new ProtocolException("Peer does not have a copy of the block chain.");
}
// Handshake is done!
}
