// Notifies a peer with a command, no response expected
internal void Reply(LevinPeer Peer, int CommandCode, byte[] Data, bool RequestSuccessul = false, bool ResponseRequired = false)
{
// Form message header
BucketHead2 Header = new BucketHead2
{
Signature = GlobalsConfig.LEVIN_SIGNATURE,
ResponseRequired = ResponseRequired,
PayloadSize = (ulong)Data.Length,
CommandCode = (uint)CommandCode,
ProtocolVersion = GlobalsConfig.LEVIN_VERSION,
Flags = LEVIN_PACKET_RESPONSE,
ReturnCode = RequestSuccessul? LEVIN_RETCODE_SUCCESS : LEVIN_RETCODE_FAILURE
};
// Debug
Logger?.Log(Level.DEBUG, "Sending header:");
Logger?.Log(Level.DEBUG, " - Signature: {0}", Header.Signature);
Logger?.Log(Level.DEBUG, " - Payload Size: {0}", Header.PayloadSize);
Logger?.Log(Level.DEBUG, " - Response Required: {0}", Header.ResponseRequired);
Logger?.Log(Level.DEBUG, " - Command Code: {0}", Header.CommandCode);
Logger?.Log(Level.DEBUG, " - Return Code: {0}", Header.ReturnCode);
Logger?.Log(Level.DEBUG, " - Flags: {0}", Header.Flags);
Logger?.Log(Level.DEBUG, " - Protocol Version: {0}", Header.ProtocolVersion);
// Send header packet
if (Server.SendMessage(Peer.Connection, Header.Serialize()))
{
// Send body packet
Server.SendMessage(Peer.Connection, Data);
}
}
// Notifies a peer with a command, no response expected
public void Reply(LevinPeer Peer, int CommandCode, byte[] Data, bool RequestSuccessul = false, bool ResponseRequired = false)
{
// Form message header
BucketHead2 Header = new BucketHead2
{
Signature = GlobalsConfig.LEVIN_SIGNATURE,
ResponseRequired = ResponseRequired,
PayloadSize = (ulong)Data.Length,
CommandCode = (uint)CommandCode,
ProtocolVersion = GlobalsConfig.LEVIN_VERSION,
Flags = LEVIN_PACKET_RESPONSE,
ReturnCode = RequestSuccessul? LEVIN_RETCODE_SUCCESS : LEVIN_RETCODE_FAILURE
};
// Debug
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, "Sending header:", LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Signature: " + Header.Signature, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Payload Size: " + Header.PayloadSize, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Response Required: " + Header.ResponseRequired, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Command Code: " + Header.CommandCode, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Return Code: " + Header.ReturnCode, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Flags: " + Header.Flags, LogLevel.DEBUG);
ConsoleMessage.WriteLine(ConsoleMessage.DefaultColor, " - Protocol Version: " + Header.ProtocolVersion, LogLevel.DEBUG);
// Send header packet
if (Server.SendMessage(Peer.Connection, Header.Serialize()))
{
// Send body packet
Server.SendMessage(Peer.Connection, Data);
}
}
// Deserializes the header information from a byte array
internal static BucketHead2 Deserialize(byte[] Data)
{
try
{
// Create a header object
BucketHead2 Head = new BucketHead2();
// Create a working byte array
byte[] CurrentBytes = new byte[0];
// Decode signature
CurrentBytes = new byte[8];
Buffer.BlockCopy(Data, 0, CurrentBytes, 0, CurrentBytes.Length);
Head.Signature = Encoding.ByteArrayToInteger <ulong>(CurrentBytes);
// Decode payload size
CurrentBytes = new byte[8];
Buffer.BlockCopy(Data, 8, CurrentBytes, 0, CurrentBytes.Length);
Head.PayloadSize = Encoding.ByteArrayToInteger <ulong>(CurrentBytes);
// Decode response required
CurrentBytes = new byte[1];
Buffer.BlockCopy(Data, 16, CurrentBytes, 0, CurrentBytes.Length);
Head.ResponseRequired = Convert.ToBoolean(CurrentBytes[0]);
// Decode command code
CurrentBytes = new byte[4];
Buffer.BlockCopy(Data, 17, CurrentBytes, 0, CurrentBytes.Length);
Head.CommandCode = Encoding.ByteArrayToInteger <uint>(CurrentBytes);
// Decode return code
CurrentBytes = new byte[4];
Buffer.BlockCopy(Data, 21, CurrentBytes, 0, CurrentBytes.Length);
Head.ReturnCode = Encoding.ByteArrayToInteger <int>(CurrentBytes);
// Decode flags
CurrentBytes = new byte[4];
Buffer.BlockCopy(Data, 25, CurrentBytes, 0, CurrentBytes.Length);
Head.Flags = Encoding.ByteArrayToInteger <uint>(CurrentBytes);
// Decode protocol version
CurrentBytes = new byte[4];
Buffer.BlockCopy(Data, 29, CurrentBytes, 0, CurrentBytes.Length);
Head.ProtocolVersion = Encoding.ByteArrayToInteger <uint>(CurrentBytes);
// Return header object
return(Head);
}
catch
{
return(default(BucketHead2));
}
}
// Notifies all peers with a command, no response expected
internal void NotifyAll(int CommandCode, byte[] Data)
{
// Form message header
BucketHead2 Header = new BucketHead2
{
Signature = GlobalsConfig.LEVIN_SIGNATURE,
ResponseRequired = false,
PayloadSize = (ulong)Data.Length,
CommandCode = (uint)CommandCode,
ProtocolVersion = GlobalsConfig.LEVIN_VERSION,
Flags = LEVIN_PACKET_REQUEST
};
// Send header packet
Server.Broadcast(Header.Serialize());
// Send body packet
Server.Broadcast(Data);
}
// Notifies a peer with a command, no response expected
internal void Notify(PeerConnection Peer, int CommandCode, byte[] Data)
{
// Form message header
BucketHead2 Header = new BucketHead2
{
Signature = GlobalsConfig.LEVIN_SIGNATURE,
ResponseRequired = false,
PayloadSize = (ulong)Data.Length,
CommandCode = (uint)CommandCode,
ProtocolVersion = LEVIN_PROTOCOL_VER_1,
Flags = LEVIN_PACKET_REQUEST
};
// Send header packet
if (Server.SendMessage(Peer, Header.Serialize()))
{
// Send body packet
Server.SendMessage(Peer, Data);
}
}
// Data received
private void OnDataReceived(object sender, EventArgs e)
{
// Get packet data
Packet Packet = (Packet)sender;
LevinPeer Peer = Peers[Packet.Peer];
// Read header
if (Peer.ReadStatus == PacketReadStatus.Head)
{
// Decode header
try { Peer.Header = BucketHead2.Deserialize(Packet.Data); }
catch
{
Logger?.Log(Level.DEBUG, "Could not deserialize incoming packet header, incorrect format");
return;
}
// Set peer data
Peer.Data = Packet.Data;
// Debug
/*Logger?.Log(Level.DEBUG, "Received header:");
* Logger?.Log(Level.DEBUG, " - Signature: {0}", Peers[Packet.Peer].Header.Signature);
* Logger?.Log(Level.DEBUG, " - Payload Size: {0}", Peers[Packet.Peer].Header.PayloadSize);
* Logger?.Log(Level.DEBUG, " - Response Required: {0}", Peers[Packet.Peer].Header.ResponseRequired);
* Logger?.Log(Level.DEBUG, " - Command Code: {0}", Peers[Packet.Peer].Header.CommandCode);
* Logger?.Log(Level.DEBUG, " - Return Code: {0}", Peers[Packet.Peer].Header.ReturnCode);
* Logger?.Log(Level.DEBUG, " - Flags: {0}", Peers[Packet.Peer].Header.Flags);
* Logger?.Log(Level.DEBUG, " - Protocol Version: {0}", Peers[Packet.Peer].Header.ProtocolVersion);*/
// Check that signature matches
if (Peer.Header.Signature != GlobalsConfig.LEVIN_SIGNATURE)
{
Logger?.Log(Level.DEBUG, "Incoming packet signature mismatch, expected {0}, received {1}", GlobalsConfig.LEVIN_SIGNATURE, Peers[Packet.Peer].Header.Signature);
return;
}
// Check packet size
if (Peer.Header.PayloadSize > GlobalsConfig.LEVIN_MAX_PACKET_SIZE)
{
Logger?.Log(Level.DEBUG, "Incoming packet size is too big, max size is {0}, received {1}", GlobalsConfig.LEVIN_MAX_PACKET_SIZE, Packet.Data.Length);
return;
}
// Set new read status
if (Peer.Header.PayloadSize > 0)
{
Peers[Packet.Peer].ReadStatus = PacketReadStatus.Body;
}
}
// Add data to peer buffer if reading message body
else
{
// Add bytes to peer buffer
byte[] NewData = new byte[Peer.Data.Length + Packet.Data.Length];
Buffer.BlockCopy(Peer.Data, 0, NewData, 0, Peer.Data.Length);
Buffer.BlockCopy(Packet.Data, 0, NewData, Peer.Data.Length, Packet.Data.Length);
Peer.Data = NewData;
}
// Check if data size matches payload size and that a header has been decoded
if (Peer.ReadStatus == PacketReadStatus.Body && (ulong)Peer.Data.Length >= Peer.Header.PayloadSize)
{
// Get header
BucketHead2 Header = Peer.Header;
// Decode command
Command Command = new Command
{
CommandCode = Header.CommandCode,
IsNotification = !Header.ResponseRequired,
IsResponse = (Header.Flags & LEVIN_PACKET_RESPONSE) == LEVIN_PACKET_RESPONSE,
Data = Encoding.SplitByteArray(Peers[Packet.Peer].Data, 33, (int)Peers[Packet.Peer].Header.PayloadSize)
};
// Check if peer requires a handshake
if (Command.CommandCode == Commands.Handshake.Id)
{
Commands.Handshake.Invoke(this, Peer, Command); // 1001
}
else if (Peer.State == PeerState.Verified)
{
// Invoke other commands
if (Command.CommandCode == Commands.Ping.Id)
{
Commands.Ping.Invoke(this, Peer, Command); // 1002
}
else if (Command.CommandCode == Commands.TimedSync.Id)
{
Commands.TimedSync.Invoke(this, Peer, Command); // 1003
}
else if (Command.CommandCode == Commands.NotifyRequestChain.Id)
{
Commands.NotifyRequestChain.Invoke(this, Peer, Command); // 2006
}
else if (Command.CommandCode == Commands.RequestTxPool.Id)
{
Commands.RequestTxPool.Invoke(this, Peer, Command); // 2008
}
}
// Debug
else if (Peer.State == PeerState.Unverified)
{
Logger?.Log(Level.DEBUG, "[IN] Received command:");
Logger?.Log(Level.DEBUG, " - Command Code: {0}", Command.CommandCode);
Logger?.Log(Level.DEBUG, " - Is Notification: {0}", Command.IsNotification);
Logger?.Log(Level.DEBUG, " - Is Response: {0}", Command.IsResponse);
Logger?.Log(Level.DEBUG, " - Data: {0} Bytes", Command.Data.Length);
Logger?.Log(Level.DEBUG, Encoding.ByteArrayToHexString(Command.Data));
}
// Set new read status and clear previous request
Peer.ReadStatus = PacketReadStatus.Head;
Peer.Header = default(BucketHead2);
Peer.Data = new byte[0];
}
}
