public DataTransferEventArgs(TransferType type, PacketFamily family, PacketAction action, byte[] rawData)
{
Type = type;
PacketFamily = family;
PacketAction = action;
RawByteData = rawData;
}
public DataTransferEventArgs(TransferType type, PacketFamily family, PacketAction action, byte[] rawData)
{
Type = type;
PacketFamily = family;
PacketAction = action;
RawByteData = rawData;
}
private string Command(ReadOnlyCollection <string> input)
{
DisplayText.Length = 0;
string errorMessage = "";
TheStopwatch.Reset();
TheStopwatch.Start();
bool error = false;
string output = "";
try {
PacketAction pAction = ExamineUserInput(input);
switch (pAction)
{
case PacketAction.Method:
AddMethod(input);
output = "Method " + Maker.MostRecentNameAdded;
break;
case PacketAction.Field:
AddMethod(input);
output = "Field " + Maker.MostRecentNameAdded;
break;
case PacketAction.Statement:
DoFieldsInitialisationIfOne();
Maker.DoStatement <REPL>(this, input, false);
output = "Statement";
break;
case PacketAction.Expression:
DoFieldsInitialisationIfOne();
output = "Expression\n" + Maker.DoExpression <REPL, object>(this, input, false).ToString();
break;
default: return("");
}
} catch (Exception ex) {
output = ex.Message;
error = true;
}
if (StopwatchOn)
{
TheStopwatch.Stop();
output = "time " + ((long)((1000000.0 * TheStopwatch.ElapsedTicks / Stopwatch.Frequency))).ToString() + "us\n" + output;
}
if (error)
{
output = "-" + output;
}
else
{
output = "+" + output;
}
if (DisplayText.Length != 0)
{
output += "\n" + DisplayText;
}
return(output);
}
public IPacketBuilder WithAction(PacketAction action)
{
var newData = new List <byte>(_data);
newData[0] = (byte)action;
return(new PacketBuilder(newData));
}
public PacketBuilder(PacketFamily family, PacketAction action)
{
_data = new List <byte> {
(byte)action, (byte)family
};
_encoderService = new NumberEncoderService();
}
public OldPacket(PacketFamily family, PacketAction action)
{
data = new List <byte>(2)
{
(byte)action, (byte)family
};
}
/// <summary>
/// Setup the PacketSendService mock to return a packet with the specified family/action/data from SendEncodedPacketAndWaitAsync
/// </summary>
/// <param name="packetSendServiceMock">The mocked packet send service</param>
/// <param name="family">Packet family for the "received" packet</param>
/// <param name="action">Packet action for the "received" packet</param>
/// <param name="data">Packet data payload (any additional data that should be in the packet)</param>
internal static void SetupReceivedPacketHasHeader(this Mock <IPacketSendService> packetSendServiceMock,
PacketFamily family,
PacketAction action,
params byte[] data)
{
var receivedPacket = new PacketBuilder(family, action)
.AddBytes(data)
.Build();
packetSendServiceMock.Setup(x => x.SendEncodedPacketAndWaitAsync(It.IsAny <IPacket>()))
.Returns(Task.FromResult(receivedPacket));
}
/// <summary>
/// Raises the filtering packet event.
/// </summary>
/// <param name="pak">The pak.</param>
private void RaiseFilteringPacketEvent(Packet pak)
{
try
{
PacketAction e = FilteringPacketEvent;
if (e != null)
{
e(pak);
}
}
catch (Exception e)
{
Log.Error(e.Message, e);
}
}
public PacketHandlingType FindHandlingType(PacketFamily family, PacketAction action)
{
var fap = new FamilyActionPair(family, action);
if (_inBandPackets.Contains(fap))
{
return(PacketHandlingType.InBand);
}
if (_outOfBandPackets.Contains(fap))
{
return(PacketHandlingType.OutOfBand);
}
return(PacketHandlingType.NotHandled);
}
private static void AddPacket(string name, byte header, PacketAction action)
{
if (Locked)
{
return;
}
if (_headersToActions.ContainsKey(header))
{
Console.WriteLine("Cannot add core packet " + name + "!");
return;
}
_headersToActions.Add(header, action);
_headersToNames.Add(header, name);
_namesToHeaders.Add(name, header);
}
//Add packet. Will be added to list on Finalize();
public static void AddPacket(string name, PacketAction action)
{
if (Locked)
{
return;
}
foreach (Packet packet in _registerQueue)
{
if (packet.name == name)
{
Console.WriteLine("Cannot create duplicate packet type: " + name + "!");
return;
}
}
_registerQueue.Add(new Packet(name, action));
}
public static void Handle(NetIncomingMessage message, NetServer server, NetConnection client)
{
PacketFamily family = (PacketFamily)message.ReadByte();
PacketAction action = (PacketAction)message.ReadByte();
Handler handler = handlers[(byte)family, (byte)action];
if (handler == null)
{
System.Diagnostics.Debug.WriteLine("No handler set for " + family + "_" + action);
}
else
{
lock (client)
{
handler(message, server, client);
}
}
}
/// <summary> Reads all packets from the message and invokes the event handlers. </summary>
protected override void HandlePacket(PipeMessage msg, bool outgoing)
{
Debug.Assert(msg.HasData);
var data = msg.Data;
int packetStart = 0;
while (packetStart < data.Length)
{
//read cleartext packet header
Debug.Assert(BitConverter.ToInt16(data, packetStart + 0) == 0x0002, "Unknown xor offset");
short packetLen = BitConverter.ToInt16(data, packetStart + 2);
//extract packet and parse it
byte[] slice = new byte[packetLen]; //TODO: C# 7 slicing
Array.Copy(data, packetStart, slice, 0, packetLen);
SWPacket p = SWPacket.Parse(slice);
PacketAction?.Invoke(this, new SnifferEventArgs(p, outgoing, msg.Header.SocketId));
//update packet start
packetStart += packetLen;
}
}
private static Handler[,] InitializeHandlers()
{
handlers = new Handler[256, 256];
foreach (var type in Assembly.GetCallingAssembly().GetTypes())
{
if (type.Namespace == typeof(Handler).Namespace + ".Handlers" && type.Name.EndsWith("Handler"))
{
PacketFamily family = (PacketFamily)Enum.Parse(typeof(PacketFamily), type.Name.Substring(0, type.Name.Length - 7));
foreach (MethodInfo method in type.GetMethods())
{
if (method.IsStatic && method.Name.StartsWith("Handle"))
{
PacketAction action = (PacketAction)Enum.Parse(typeof(PacketAction), method.Name.Substring(6));
handlers[(byte)family, (byte)action] = (Handler)Delegate.CreateDelegate(typeof(Handler), method);
}
}
}
}
return(handlers);
}
public bool HandlerExists(PacketFamily family, PacketAction action)
{
return(_handlers.ContainsKey(new FamilyActionPair(family, action)));
}
public static ushort PID(PacketFamily family, PacketAction action)
{
return((ushort)((ushort)family | (ushort)action << 8));
}
// packet handler
public static void ProcessPacket(Client client, string allPacketString)
{
string[] allPackets = allPacketString.Split('\0');
for (int i = 0; i < allPackets.Length; i++)
{
string[] packet = allPackets[i].Split(' ');
if (string.IsNullOrEmpty(packet[0]))
{
break;
}
// handle packet based on type
PacketAction action = (PacketAction)int.Parse(packet[0]);
switch (action)
{
// place ship
case PacketAction.PLACESHIP:
{
Tuple <int, int> location = MnemonicToIndex(packet[1]);
client.ChangeGrid(location.Item1, location.Item2, 'S');
break;
}
// both clients connected, start game
case PacketAction.GAMEREADY:
{
client.GameReady = true;
if (_client1 != null && _client1.IsConnected() && _client1.GameReady &&
_client2 != null && _client2.IsConnected() && _client2.GameReady)
{
Random r = new Random();
int select = r.Next() % 2; // coin flip to decide who goes first
if (select == 0)
{
// client 1 goes first
_client1.SendPacket(((int)PacketAction.PLAYERTURN).ToString());
_client2.SendPacket(((int)PacketAction.OPPONENTTURN).ToString());
}
else
{
// client 2 goes first
_client2.SendPacket(((int)PacketAction.PLAYERTURN).ToString());
_client1.SendPacket(((int)PacketAction.OPPONENTTURN).ToString());
}
}
break;
}
// player attack success
case PacketAction.PLAYERATTACK:
{
// if client 1 is attacking,
if (client == _client1)
{
// get attack coordinates
Tuple <int, int> location = MnemonicToIndex(packet[1]);
// if there is an enemy ship at the coordinates,
if (_client2.GetAttack(location.Item1, location.Item2))
{
// check if client 2 has any ships left,
if (!_client2.CheckIfLose())
{
// send attack to client 2
string message = ((int)PacketAction.OPPONENTATTACK).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
// send feedback to client 1
message = ((int)PacketAction.PLAYERHIT).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
}
// if client 2 has no ships left
else
{
// client 1 wins
string message = ((int)PacketAction.PLAYERWIN).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
// client 2 loses
// send packet to display all the opponent's ships
for (int x = 0; x < Client.GRID_SIZE; x++)
{
for (int y = 0; y < Client.GRID_SIZE; y++)
{
if (_client1.CheckGridStatus(x, y) == 'S')
{
message = ((int)PacketAction.DISPLAYSHIP).ToString() + " " + IndexToMnemonic(x, y);
_client2.SendPacket(message);
}
}
}
message = ((int)PacketAction.PLAYERLOSS).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
}
}
// if there is no enemy ship at the coordinates,
else
{
// send attack to client 2
string message = ((int)PacketAction.OPPONENTATTACK).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
//send feedback to client 1
message = ((int)PacketAction.PLAYERMISS).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
}
}
// or, if client 2 is attacking,
else
{
// get attack coordinates
Tuple <int, int> location = MnemonicToIndex(packet[1]);
// if there is an enemy ship at the coordinates,
if (_client1.GetAttack(location.Item1, location.Item2))
{
// check if client 1 has any ships left,
if (!_client1.CheckIfLose())
{
// send attack to client 1
string message = ((int)PacketAction.OPPONENTATTACK).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
// send feedback to client 2
message = ((int)PacketAction.PLAYERHIT).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
}
// if client 1 has no ships left
else
{
// client 2 wins
string message = ((int)PacketAction.PLAYERWIN).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
// client 1 loses
// send packet to display all the opponent's ships
for (int x = 0; x < Client.GRID_SIZE; x++)
{
for (int y = 0; y < Client.GRID_SIZE; y++)
{
if (_client2.CheckGridStatus(x, y) == 'S')
{
message = ((int)PacketAction.DISPLAYSHIP).ToString() + " " + IndexToMnemonic(x, y);
_client1.SendPacket(message);
}
}
}
message = ((int)PacketAction.PLAYERLOSS).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
}
}
// if there is no enemy ship at the coordinates,
else
{
// send attack to client 1
string message = ((int)PacketAction.OPPONENTATTACK).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client1.SendPacket(message);
//send feedback to client 2
message = ((int)PacketAction.PLAYERMISS).ToString() + " " + IndexToMnemonic(location.Item1, location.Item2);
_client2.SendPacket(message);
}
}
break;
}
default:
Program.DisconnectClient(client);
break;
}
}
}
public PacketAction Defragment(int direction)
{
PacketAction result = PacketAction.NONE;
bool LoopAgain = true;
while (LoopAgain)
{
LoopAgain = false;
foreach (TCPPacket packet in Packets[direction])
{
if (packet.MinSequence <= Sequence[direction])
{
Packets[direction].Remove(packet);
if (packet.MaxSequence > Sequence[direction]) // i.e. if adds anything new
{
long srcIndex = packet.DataStart + (Sequence[direction] - packet.MinSequence);
long length = packet.MaxSequence - Sequence[direction];
long packetDataLength = packet.Packet.Length;
if (length > packetDataLength)
{
//ErrorLog("Unreasonable TCP/IP packet.Setting the packet length as received data length");
//Setting the packet length as received data length
//length = packetDataLength - srcIndex;
return(PacketAction.DEAD);
}
long stPos = Position[direction];
long requiredLengh = stPos + length + 10;//10 is approximately added... because sometimes system is throwing exception
long arLength = data[direction].Length;
if (requiredLengh > arLength)
{
Array.Resize(ref data[direction], (int)(arLength + (requiredLengh - arLength)));
}
Array.Copy(packet.Packet, srcIndex, data[direction], Position[direction], length);
Position[direction] += (uint)(packet.MaxSequence - Sequence[direction]);
Sequence[direction] = packet.MaxSequence;
Times[direction].Add(new PacketTime(packet.TimeStamp, packet.MinSequence));
return(PacketAction.DATA);
}
if (packet.FIN)
{
State[direction] = States.FINISHED;
return(PacketAction.FIN);
}
if (packet.RST)
{
State[direction] = States.FINISHED;
return(PacketAction.RST);
}
LoopAgain = true; // here for repeats etc.
break; // to restart iterator
}
else // beyond current position
{
if (packet.MaxSequence > Sequence[direction] + packet.PTcp.WindowSize * 2 && Sequence[direction] != 0) // more than twice ahead of window means likely missed data
{
result = PacketAction.DEAD;
}
}
}
}
return(result);
}
/// <summary>
/// Sets a PacketAction binding.
/// </summary>
/// <param name="type">The type of packet.</param>
/// <param name="action">The action to bind.</param>
public void SetAction(byte type, PacketAction action)
{
#if DEBUG
if (!isSystem && type >= ReservedPacketTypeLower && type <= ReservedPacketTypeUpper)
throw new Exception("Cannot assign to a reserved packet type.");
#endif
Actions[type] = action;
}
public Packet(string name, PacketAction action)
{
this.name = name;
this.action = action;
}
public EOPacketHandler(PacketFamily family, PacketAction action, EOPacketChannel channel)
{
this.Family = family;
this.Action = action;
this.Channel = channel;
}
public static ushort PID(PacketFamily family, PacketAction action)
{
return (ushort)((ushort)family | (ushort)action << 8);
}
public Packet(PacketFamily family, PacketAction action)
{
data = new List<byte>(2) {(byte) action, (byte) family};
}
public IPacketHandler FindHandler(PacketFamily family, PacketAction action)
{
return(_handlers[new FamilyActionPair(family, action)]);
}
// ReSharper disable once UnusedMember.Global
public void SetID(PacketFamily family, PacketAction action)
{
data[0] = (byte)action;
data[1] = (byte)family;
}
// packet handler
private void ProcessPacket(string allPacketString)
{
string[] allPackets = allPacketString.Split('\0');
for (int i = 0; i < allPackets.Length; i++)
{
string[] packet = allPackets[i].Split(' ');
if (string.IsNullOrEmpty(packet[0]))
{
break;
}
// get packet type
PacketAction action = (PacketAction)int.Parse(packet[0]);
// handle packet based on type
switch (action)
{
// opponent attacking player
case PacketAction.OPPONENTATTACK:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
ProcessOpponentAttack(coord.Item1, coord.Item2);
CurStage = Stage.PLAYERTURN;
break;
}
// opponent connected
case PacketAction.OPPONENTREADY:
CurStage = Stage.PLACEBATTLESHIP;
break;
// ship placement turn
case PacketAction.PLACESHIP:
CurStage++;
break;
// player's turn
case PacketAction.PLAYERTURN:
CurStage = Stage.PLAYERTURN;
break;
// opponent's turn
case PacketAction.OPPONENTTURN:
CurStage = Stage.OPPONENTTURN;
break;
// feedback for player's attack succeeding
case PacketAction.PLAYERHIT:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
_opponentTiles[coord.Item1][coord.Item2].Status = 'H';
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "Hit at " + packet[1] + "."; }));
CurStage = Stage.OPPONENTTURN;
break;
}
// feedback for player's attack failing
case PacketAction.PLAYERMISS:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
_opponentTiles[coord.Item1][coord.Item2].Status = 'M';
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "Miss at " + packet[1] + "."; }));
CurStage = Stage.OPPONENTTURN;
break;
}
// your opponent has been disconnected, disconnect player
case PacketAction.OPPONENTFORFEIT:
CurStage = Stage.WIN;
// see results, but close connection.
_sock.Close();
_sock = null;
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "Your opponent has disconnected and forfeited!"; }));
break;
// server is full, disconnect
case PacketAction.TOOMANYCONNECTIONS:
DisconnectClient();
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "Error: Too many connections!"; }));
break;
// display opponent's ships when lost.
case PacketAction.DISPLAYSHIP:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
if (_opponentTiles[coord.Item1][coord.Item2].Status == 'N')
{
_opponentTiles[coord.Item1][coord.Item2].Status = 'S';
}
break;
}
// player wins!
case PacketAction.PLAYERWIN:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
_opponentTiles[coord.Item1][coord.Item2].Status = 'H';
CurStage = Stage.WIN;
// see results, but close connection.
_sock.Close();
_sock = null;
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "You won! To play again, please disconnect and reconnect to the server."; }));
break;
}
// player loses!
case PacketAction.PLAYERLOSS:
{
Tuple <int, int> coord = MnemonicToIndex(packet[1]);
_playerTiles[coord.Item1][coord.Item2].Status = 'H';
CurStage = Stage.LOSE;
// see results, but close connection.
_sock.Close();
_sock = null;
statusBox.Invoke(new MethodInvoker(delegate() { statusBox.Text = "You lost... To play again, please disconnect and reconnect to the server."; }));
break;
}
// error, disconnect
default:
DisconnectClient(); break;
}
}
}
public FamilyActionPair(PacketFamily family, PacketAction action)
{
fam = family;
act = action;
}
// ReSharper disable once UnusedMember.Global
public void SetID(PacketFamily family, PacketAction action)
{
data[0] = (byte)action;
data[1] = (byte)family;
}
public FamilyActionPair(PacketFamily family, PacketAction action)
{
fam = family;
act = action;
}
/// <summary>
/// initiate a packet builder with pre-defined family and actions
/// </summary>
/// <param name="family"></param>
/// <param name="action"></param>
public PacketBuilder(PacketFamily family, PacketAction action)
{
_data = new byte[] { (byte)family, (byte)action };
}
