private static MISP.ScriptList DecodeList(ReadOnlyDatagram datagram)
{
var r = new MISP.ScriptList();
uint count = 0;
datagram.ReadUInt(out count, 8);
byte[] temp = new byte[4];
for (int i = 0; i < count; ++i)
{
uint typeCode = 0;
datagram.ReadUInt(out typeCode, 8);
switch ((ScriptTypes)typeCode)
{
case ScriptTypes.List:
r.Add(DecodeList(datagram));
break;
case ScriptTypes.String:
{
String s;
datagram.ReadString(out s);
r.Add(s);
}
break;
case ScriptTypes.Int32:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToInt32(temp, 0));
break;
case ScriptTypes.UInt32:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToUInt32(temp, 0));
break;
case ScriptTypes.Single:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToSingle(temp, 0));
break;
case ScriptTypes.Bool:
{
uint b = 0;
datagram.ReadUInt(out b, 8);
if (b == 0) r.Add(null);
else r.Add(true);
}
break;
default:
throw new MISP.ScriptError("Error decoding message", null);
}
}
return r;
}
void IModule.BeginSimulation(Simulation sim)
{
this.sim = sim;
sim.sendMessageHandler += (bytes) => { pendingMessages.Add(bytes); };
try
{
netSession = new Network.ServerSession(port, sim.debug);
netSession.onClientJoined += (client) =>
{
var welcomeDatagram = new Network.WriteOnlyDatagram();
welcomeDatagram.WriteUInt(0, 8);
welcomeDatagram.WriteString(sim.Content.Module.Name);
welcomeDatagram.WriteUInt((uint)sim.Content.Module.Version, 32);
netSession.sendCriticalDatagram(client, welcomeDatagram.BufferAsArray, () =>
{
sim.EnqueueEvent("on-new-client", new MISP.ScriptList(client));
});
};
netSession.onDatagramReceived += (client, bytes) =>
{
var gram = new Network.ReadOnlyDatagram(bytes);
while (gram.More)
{
uint messageCode = 0;
gram.ReadUInt(out messageCode, 8);
switch (messageCode)
{
case 0:
//Should never receive this message.
break;
case 1:
//Should never receive this message.
break;
case 2:
{
UInt32 length;
gram.ReadUInt(out length, 32);
byte[] message = new byte[length];
gram.ReadBytes(message, length);
string messageID = null;
MISP.ScriptList messageData = null;
ScriptMessage.DecodeMessage(message, out messageID, out messageData);
sim.EnqueueEvent(messageID, messageData);
}
break;
}
}
};
}
catch (Exception e)
{
System.Console.WriteLine("While trying to create a server module, " + e.Message);
throw e;
}
}
public ClientModule(System.Net.IPAddress host, int port, ClientGame parentGame)
{
netSession = new Network.ClientSession(0, new System.Net.IPEndPoint(host, port),
parentGame.Main.ScriptConsole.Write);
netSession.onDatagramReceived += (data) =>
{
var gram = new Network.ReadOnlyDatagram(data);
while (gram.More)
{
uint messageCode = 0;
gram.ReadUInt(out messageCode, 8);
switch (messageCode)
{
case 0:
if (simulation != null) throw new InvalidProgramException();
{
String episodeName;
uint version;
gram.ReadString(out episodeName);
gram.ReadUInt(out version, 32);
parentGame.StartSimulation(episodeName, version);
}
break;
case 1:
{
UInt32 entityID;
UInt32 syncID;
UInt32 dataLength;
gram.ReadUInt(out entityID, 32);
gram.ReadUInt(out syncID, 8);
gram.ReadUInt(out dataLength, 32);
var bytes = new byte[dataLength];
gram.ReadBytes(bytes, dataLength);
if (syncables.ContainsKey(entityID))
foreach (var syncable in syncables[entityID])
//if (syncable.SyncID == syncID)
syncable.ReadFullSync(new ReadOnlyDatagram(bytes));
}
break;
case 2:
{
UInt32 length;
gram.ReadUInt(out length, 32);
byte[] message = new byte[length];
gram.ReadBytes(message, length);
string messageID = null;
MISP.ScriptList messageData = null;
ScriptMessage.DecodeMessage(message, out messageID, out messageData);
simulation.EnqueueEvent(messageID, messageData);
}
break;
}
}
};
parentGame.Main.Write("Connected to server " + host + " on port " + port + "\n");
}
private static Common.ObjectList DecodeList(ReadOnlyDatagram datagram)
{
var r = new Common.ObjectList();
uint count = 0;
datagram.ReadUInt(out count, 8);
byte[] temp = new byte[4];
for (int i = 0; i < count; ++i)
{
uint typeCode = 0;
datagram.ReadUInt(out typeCode, 8);
switch ((ScriptTypes)typeCode)
{
case ScriptTypes.List:
r.Add(DecodeList(datagram));
break;
case ScriptTypes.String:
{
String s;
datagram.ReadString(out s);
r.Add(s);
}
break;
case ScriptTypes.Int32:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToInt32(temp, 0));
break;
case ScriptTypes.UInt32:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToUInt32(temp, 0));
break;
case ScriptTypes.Single:
datagram.ReadBytes(temp, 4);
r.Add(BitConverter.ToSingle(temp, 0));
break;
case ScriptTypes.Bool:
{
uint b = 0;
datagram.ReadUInt(out b, 8);
if (b == 0)
{
r.Add(null);
}
else
{
r.Add(true);
}
}
break;
default:
throw new InvalidProgramException("Error decoding message", null);
}
}
return(r);
}
public void update()
{
try
{
while (socket.Available > 0)
{
IPEndPoint observedEndpoint = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = null;
try
{
bytes = socket.Receive(ref observedEndpoint);
}
catch (System.Net.Sockets.SocketException except)
{
_debug(0, "[SS] Receive threw an exception. Socket Error : " + except.SocketErrorCode);
continue;
}
_debug(1, "[SS] Incoming message of length " + bytes.Length.ToString() + " : " + BitConverter.ToString(bytes));
_debug(1, "[SS] It appears to have come from " + observedEndpoint.ToString());
var datagram = new ReadOnlyDatagram(bytes);
uint messageType = 0;
uint ackID = 0;
if (!datagram.ReadUInt(out messageType, 8))
{
goto OnBadMessage;
}
if (!datagram.ReadUInt(out ackID, 32))
{
goto OnBadMessage;
}
var sendingClient = clients.FirstOrDefault((client) => { return(client.observedAddress.Equals(observedEndpoint)); });
switch ((ClientToServerMessage)messageType)
{
case ClientToServerMessage.Join:
{
if (sendingClient != null) //Client has already joined - assume the ack was dropped.
{
_sendAckMessage(sendingClient, ackID);
break;
}
try
{
var newClient = new Client();
newClient.observedAddress = observedEndpoint;
newClient.Guid = Guid.NewGuid();
newClient.lastCommunication = DateTime.Now;
_debug(0, "[SS] A client with observed address " + observedEndpoint.ToString() + " has joined the session.");
foreach (var existingClient in clients)
{
_sendPeerJoinedMessage(existingClient, newClient);
_sendPeerJoinedMessage(newClient, existingClient);
}
clients.Add(newClient);
if (onClientJoined != null)
{
onClientJoined(newClient);
}
_sendAckMessage(newClient, ackID);
}
catch (Exception e)
{
_debug(0, "[SS] Accepting new client threw exception: " + e.Message);
}
}
break;
case ClientToServerMessage.Acknowledge:
{
var criticalDatagram = criticalDatagrams.FirstOrDefault((crit) => { return(crit.ackID == ackID); });
if (criticalDatagram != null)
{
if (!criticalDatagram.to.observedAddress.Equals(observedEndpoint))
{
_debug(1, "[SS] The observed endpoint of the ack reply does not match the known observed endpoint of the peer the datagram was sent to.");
break;
}
if (criticalDatagram.onSuccess != null)
{
try
{
criticalDatagram.onSuccess();
}
catch (Exception) { }
}
criticalDatagrams.Remove(criticalDatagram);
}
}
break;
case ClientToServerMessage.Datagram:
{
if (sendingClient == null)
{
//_debug("[SS] I received a datagram from an unknown client with address " + observedEndpoint.ToString() +".");
break;
}
if (ackID != 0)
{
_sendAckMessage(sendingClient, ackID);
if (sendingClient.newDatagramReceived(ackID) == RemotePeer.DatagramResponse.Ignore)
{
break;
}
}
_debug(2, "[SS] I received a datagram from client " + sendingClient.Guid.ToString()
+ ". It was " + (bytes.Length - 5).ToString() + " bytes long.");
if (bytes.Length - 5 <= 0)
{
goto OnBadMessage;
}
byte[] data = new byte[bytes.Length - 5];
if (!datagram.ReadBytes(data, (uint)(bytes.Length - 5)))
{
goto OnBadMessage;
}
if (onDatagramReceived != null)
{
onDatagramReceived(sendingClient, data);
}
}
break;
}
continue;
OnBadMessage:
{
_debug(1, "[SS] I received a bad message.");
}
}
var now = DateTime.Now;
for (int i = 0; i < criticalDatagrams.Count;)
{
var criticalDatagram = criticalDatagrams[i];
var timeDelta = now - criticalDatagram.lastSendAttempt;
if (timeDelta.TotalMilliseconds > millisecondsBeforeRetry)
{
if (criticalDatagram.sendAttempts >= retryAttempts)
{
_debug(0, "[SS] I was not able to deliver critical packet " + criticalDatagram.ackID + ".");
criticalDatagrams.RemoveAt(i);
_onLostClient(criticalDatagram.to);
continue;
}
criticalDatagram.sendAttempts += 1;
_debug(2, "[SS] I am trying to send critical packet " + criticalDatagram.ackID + ". [" +
criticalDatagram.sendAttempts + " attempts]");
criticalDatagram.lastSendAttempt = now;
_send(criticalDatagram.data, criticalDatagram.to);
}
++i;
}
foreach (var client in clients)
{
var timeDelta = now - client.lastCommunication;
if (timeDelta.TotalMilliseconds > keepaliveRate)
{
_sendKeepalive(client);
}
}
}
catch (Exception e) { _debug(0, e.Message + "\n" + e.StackTrace); }
}
public void update()
{
try
{
while (socket.Available > 0)
{
IPEndPoint observedEndpoint = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = null;
try
{
bytes = socket.Receive(ref observedEndpoint);
}
catch (System.Net.Sockets.SocketException except)
{
_debug("[CS] Receive threw an exception. Socket Error : " + except.SocketErrorCode);
onLostConnection();
continue;
}
//_debug("[CS] Incoming message of length " + bytes.Length.ToString() + " : " + BitConverter.ToString(bytes));
//_debug("[CS] It appears to have come from " + observedEndpoint.ToString());
if (!observedEndpoint.Equals(serverAddress))
{
_debug("[CS] I don't know who this message is from.");
continue;
}
var datagram = new ReadOnlyDatagram(bytes);
uint messageType = 0;
uint ackID = 0;
if (!datagram.ReadUInt(out messageType, 8))
{
goto OnBadMessage;
}
if (!datagram.ReadUInt(out ackID, 32))
{
goto OnBadMessage;
}
if (ackID != 0)
{
_sendAckMessage(ackID);
}
if (messageType != (uint)ServerToClientMessage.Acknowledge &&
ackID != 0 &&
duplicateDatagramDetector.newDatagramReceived(ackID) == RemotePeer.DatagramResponse.Ignore)
{
continue;
}
switch ((ServerToClientMessage)messageType)
{
case ServerToClientMessage.Acknowledge:
_removeCriticalDatagram(ackID);
//if (ackID == 1) _debug("Received ACK for join");
break;
case ServerToClientMessage.Keepalive:
{
//Ack response already handled
}
break;
case ServerToClientMessage.PeerJoined:
{
var guidBytes = new byte[16];
if (!datagram.ReadBytes(guidBytes, 16))
{
goto OnBadMessage;
}
var peerGuid = new Guid(guidBytes);
var newPeer = new Peer {
Guid = peerGuid
};
if (onPeerJoined != null)
{
onPeerJoined(newPeer);
}
peers.Add(newPeer);
}
break;
case ServerToClientMessage.PeerLeft:
{
var guidBytes = new byte[16];
if (!datagram.ReadBytes(guidBytes, 16))
{
goto OnBadMessage;
}
var peerGuid = new Guid(guidBytes);
var peer = findPeer(peerGuid);
if (onPeerLeft != null)
{
onPeerLeft(peer);
}
peers.Remove(peer);
}
break;
case ServerToClientMessage.Datagram:
{
//_debug("[CS] I received a datagram from the server. It was " + (bytes.Length - 5).ToString() + " bytes long.");
if (bytes.Length - 5 <= 0)
{
goto OnBadMessage;
}
byte[] data = new byte[bytes.Length - 5];
if (!datagram.ReadBytes(data, (uint)(bytes.Length - 5)))
{
goto OnBadMessage;
}
if (onDatagramReceived != null)
{
try { onDatagramReceived(data); }
catch (Exception) { }
}
break;
}
}
continue;
OnBadMessage:
{
_debug("[CS] I received a bad message.");
}
}
var now = DateTime.Now;
for (int i = 0; i < criticalDatagrams.Count;)
{
var criticalDatagram = criticalDatagrams[i];
var timeDelta = now - criticalDatagram.lastSendAttempt;
if (timeDelta.TotalMilliseconds > millisecondsBeforeRetry)
{
if (criticalDatagram.sendAttempts >= retryAttempts)
{
_debug("[CS] I was not able to deliver critical packet " + criticalDatagram.ackID + ".");
criticalDatagrams.RemoveAt(i);
_onLostConnection();
continue;
}
criticalDatagram.sendAttempts += 1;
//_debug("[CS] I am trying to send critical packet " + criticalDatagram.ackID + ". ["
// + criticalDatagram.sendAttempts + " attempts]");
criticalDatagram.lastSendAttempt = now;
_send(criticalDatagram.data);
}
++i;
}
}
catch (Exception e)
{
_debug("[CS] " + e.Message + "\n" + e.StackTrace);
}
}
public void update()
{
try
{
while (socket.Available > 0)
{
IPEndPoint observedEndpoint = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = null;
try
{
bytes = socket.Receive(ref observedEndpoint);
}
catch (System.Net.Sockets.SocketException except)
{
_debug("[SS] Receive threw an exception. Socket Error : " + except.SocketErrorCode);
continue;
}
_debug("[SS] Incoming message of length " + bytes.Length.ToString() + " : " + BitConverter.ToString(bytes));
_debug("[SS] It appears to have come from " + observedEndpoint.ToString());
var datagram = new ReadOnlyDatagram(bytes);
uint messageType = 0;
uint ackID = 0;
if (!datagram.ReadUInt(out messageType, 8)) goto OnBadMessage;
if (!datagram.ReadUInt(out ackID, 32)) goto OnBadMessage;
var sendingClient = clients.FirstOrDefault((client) => { return client.observedAddress.Equals(observedEndpoint); });
switch ((ClientToServerMessage)messageType)
{
case ClientToServerMessage.Join:
{
if (sendingClient != null)
{
_sendAckMessage(sendingClient, ackID);
break;
}
var newClient = new Client();
newClient.observedAddress = observedEndpoint;
newClient.Guid = Guid.NewGuid();
newClient.lastCommunication = DateTime.Now;
_sendAckMessage(newClient, ackID);
_debug("[SS] A client with observed address " + observedEndpoint.ToString() + " has joined the session.");
foreach (var existingClient in clients)
{
_sendPeerJoinedMessage(existingClient, newClient);
_sendPeerJoinedMessage(newClient, existingClient);
}
clients.Add(newClient);
if (onClientJoined != null) onClientJoined(newClient);
}
break;
case ClientToServerMessage.Acknowledge:
{
var criticalDatagram = criticalDatagrams.FirstOrDefault((crit) => { return crit.ackID == ackID; });
if (criticalDatagram != null)
{
if (!criticalDatagram.to.observedAddress.Equals(observedEndpoint))
{
_debug("[SS] The observed endpoint of the ack reply does not match the known observed endpoint of the peer the datagram was sent to.");
break;
}
if (criticalDatagram.onSuccess != null)
{
try
{
criticalDatagram.onSuccess();
}
catch (Exception) { }
}
criticalDatagrams.Remove(criticalDatagram);
}
}
break;
case ClientToServerMessage.Datagram:
{
if (sendingClient == null)
{
_debug("[SS] I received a datagram from an unknown client with address " + observedEndpoint.ToString() +".");
break;
}
if (ackID != 0)
{
_sendAckMessage(sendingClient, ackID);
if (sendingClient.newDatagramReceived(ackID) == RemotePeer.DatagramResponse.Ignore)
break;
}
_debug("[SS] I received a datagram from client " + sendingClient.Guid.ToString()
+ ". It was " + (bytes.Length - 5).ToString() + " bytes long.");
if (bytes.Length - 5 <= 0) goto OnBadMessage;
byte[] data = new byte[bytes.Length - 5];
if (!datagram.ReadBytes(data, (uint)(bytes.Length - 5))) goto OnBadMessage;
if (onDatagramReceived != null) onDatagramReceived(sendingClient, data);
}
break;
}
continue;
OnBadMessage:
{
_debug("[SS] I received a bad message.");
}
}
var now = DateTime.Now;
for (int i = 0; i < criticalDatagrams.Count; )
{
var criticalDatagram = criticalDatagrams[i];
var timeDelta = now - criticalDatagram.lastSendAttempt;
if (timeDelta.TotalMilliseconds > millisecondsBeforeRetry)
{
if (criticalDatagram.sendAttempts >= retryAttempts)
{
_debug("[SS] I was not able to deliver critical packet " + criticalDatagram.ackID + ".");
criticalDatagrams.RemoveAt(i);
_onLostClient(criticalDatagram.to);
continue;
}
criticalDatagram.sendAttempts += 1;
_debug("[SS] I am trying to send critical packet " + criticalDatagram.ackID + ". [" +
criticalDatagram.sendAttempts + " attempts]");
criticalDatagram.lastSendAttempt = now;
_send(criticalDatagram.data, criticalDatagram.to);
}
++i;
}
foreach (var client in clients)
{
var timeDelta = now - client.lastCommunication;
if (timeDelta.TotalMilliseconds > keepaliveRate)
_sendKeepalive(client);
}
}
catch (Exception e) { _debug(e.Message + "\n" + e.StackTrace); }
}
public void update()
{
try
{
while (socket.Available > 0)
{
IPEndPoint observedEndpoint = new IPEndPoint(IPAddress.Any, 0);
byte[] bytes = null;
try
{
bytes = socket.Receive(ref observedEndpoint);
}
catch (System.Net.Sockets.SocketException except)
{
_debug("[CS] Receive threw an exception. Socket Error : " + except.SocketErrorCode);
onLostConnection();
continue;
}
_debug("[CS] Incoming message of length " + bytes.Length.ToString() + " : " + BitConverter.ToString(bytes));
_debug("[CS] It appears to have come from " + observedEndpoint.ToString());
if (!observedEndpoint.Equals(serverAddress))
{
_debug("[CS] I don't know who this message is from.");
continue;
}
var datagram = new ReadOnlyDatagram(bytes);
uint messageType = 0;
uint ackID = 0;
if (!datagram.ReadUInt(out messageType, 8)) goto OnBadMessage;
if (!datagram.ReadUInt(out ackID, 32)) goto OnBadMessage;
if (ackID != 0) _sendAckMessage(ackID);
if (messageType != (uint)ServerToClientMessage.Acknowledge &&
ackID != 0 &&
duplicateDatagramDetector.newDatagramReceived(ackID) == RemotePeer.DatagramResponse.Ignore)
continue;
switch ((ServerToClientMessage)messageType)
{
case ServerToClientMessage.Acknowledge:
_removeCriticalDatagram(ackID);
break;
case ServerToClientMessage.Keepalive:
{
//Ack response already handled
}
break;
case ServerToClientMessage.PeerJoined:
{
var guidBytes = new byte[16];
if (!datagram.ReadBytes(guidBytes, 16)) goto OnBadMessage;
var peerGuid = new Guid(guidBytes);
var newPeer = new Peer { Guid = peerGuid };
if (onPeerJoined != null) onPeerJoined(newPeer);
peers.Add(newPeer);
}
break;
case ServerToClientMessage.PeerLeft:
{
var guidBytes = new byte[16];
if (!datagram.ReadBytes(guidBytes, 16)) goto OnBadMessage;
var peerGuid = new Guid(guidBytes);
var peer = findPeer(peerGuid);
if (onPeerLeft != null) onPeerLeft(peer);
peers.Remove(peer);
}
break;
case ServerToClientMessage.Datagram:
{
_debug("[CS] I received a datagram from the server. It was " + (bytes.Length - 5).ToString() + " bytes long.");
if (bytes.Length - 5 <= 0) goto OnBadMessage;
byte[] data = new byte[bytes.Length - 5];
if (!datagram.ReadBytes(data, (uint)(bytes.Length - 5))) goto OnBadMessage;
if (onDatagramReceived != null)
{
try { onDatagramReceived(data); }
catch (Exception) { }
}
break;
}
}
continue;
OnBadMessage:
{
_debug("[CS] I received a bad message.");
}
}
var now = DateTime.Now;
for (int i = 0; i < criticalDatagrams.Count; )
{
var criticalDatagram = criticalDatagrams[i];
var timeDelta = now - criticalDatagram.lastSendAttempt;
if (timeDelta.TotalMilliseconds > millisecondsBeforeRetry)
{
if (criticalDatagram.sendAttempts >= retryAttempts)
{
_debug("[CS] I was not able to deliver critical packet " + criticalDatagram.ackID + ".");
criticalDatagrams.RemoveAt(i);
_onLostConnection();
continue;
}
criticalDatagram.sendAttempts += 1;
_debug("[CS] I am trying to send critical packet " + criticalDatagram.ackID + ". ["
+ criticalDatagram.sendAttempts + " attempts]");
criticalDatagram.lastSendAttempt = now;
_send(criticalDatagram.data);
}
++i;
}
}
catch (Exception e) { _debug("[CS] " + e.Message + "\n" + e.StackTrace); }
}