/// <summary>
/// Attempts to send data to endpoint via OS socket.
/// Returns false if the send failed.
/// </summary>
internal SocketError TrySend(
IPEndPoint destination,
byte[] buffer,
int length)
{
try
{
int bytesSent =
this.rawSocket.SendTo(
buffer,
length,
SocketFlags.None,
destination);
if (bytesSent == length)
{
return(SocketError.Success);
}
return(SocketError.MessageSize);
}
catch (SocketException exception)
{
NetDebug.LogError("Send failed: " + exception.Message);
NetDebug.LogError(exception.StackTrace);
return(exception.SocketErrorCode);
}
}
private void HandlePong(
NetPeer peer,
byte[] buffer,
int length)
{
if (peer.IsConnected == false)
{
return;
}
bool success =
NetEncoding.ReadProtocol(
buffer,
length,
out byte pongSeq,
out byte drop);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading pong");
return;
}
peer.OnReceivePong(Time, pongSeq, drop);
}
/// <summary>
/// Validates that a given kick reason is acceptable for a remote kick.
/// </summary>
internal static NetCloseReason ValidateKickReason(NetCloseReason reason)
{
switch (reason)
{
case NetCloseReason.RejectNotHost:
return(reason);
case NetCloseReason.RejectFull:
return(reason);
case NetCloseReason.RejectVersion:
return(reason);
case NetCloseReason.KickTimeout:
return(reason);
case NetCloseReason.KickShutdown:
return(reason);
case NetCloseReason.KickError:
return(reason);
case NetCloseReason.KickUserReason:
return(reason);
}
NetDebug.LogError("Bad kick reason: " + reason);
return(NetCloseReason.INVALID);
}
private void HandlePayload(
NetPeer peer,
byte[] buffer,
int length)
{
if (peer.IsConnected == false)
{
return;
}
// Read the payload
bool success =
NetEncoding.ReadPayload(
CreateEvent,
peer,
buffer,
length,
out ushort payloadSeq,
out NetEvent evnt);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading payload");
return;
}
// Enqueue the event for processing if the peer can receive it
if (peer.OnReceivePayload(Time, payloadSeq))
{
eventOut.Enqueue(evnt);
}
}
/// <summary>
/// Handles an incoming connection request from a remote peer.
/// </summary>
private void HandleConnectRequest(
IPEndPoint source,
byte[] buffer,
int length)
{
bool success =
NetEncoding.ReadConnectRequest(
buffer,
out string version,
out string token);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading connect request");
return;
}
if (ShouldCreatePeer(source, version))
{
long curTime = Time;
// Create and add the new peer as a client
NetPeer peer = new NetPeer(source, token, true, curTime);
peers.Add(source, peer);
peer.OnReceiveOther(curTime);
// Accept the connection over the network
sender.SendAccept(peer);
// Queue the event out to the main thread to receive the connection
eventOut.Enqueue(
CreateEvent(NetEventType.PeerConnected, peer));
}
}
private void HandlePing(
NetPeer peer,
byte[] buffer,
int length)
{
if (peer.IsConnected == false)
{
return;
}
bool success =
NetEncoding.ReadProtocol(
buffer,
length,
out byte pingSeq,
out byte loss);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading ping");
return;
}
peer.OnReceivePing(Time, loss);
sender.SendPong(peer, pingSeq, peer.GenerateDrop());
}
/// <summary>
/// Attempts to read from OS socket. Returns false if the read fails
/// or if there is nothing to read.
/// </summary>
internal SocketError TryReceive(out IPEndPoint source, byte[] destBuffer, out int length)
{
source = null;
length = 0;
lock (readLock)
{
if (rawSocket.Poll(0, SelectMode.SelectRead) == false)
{
return(SocketError.NoData);
}
try
{
EndPoint endPoint = new IPEndPoint(IPAddress.Any, 0);
length = rawSocket.ReceiveFrom(destBuffer, destBuffer.Length, SocketFlags.None, ref endPoint);
if (length > 0)
{
source = endPoint as IPEndPoint;
return(SocketError.Success);
}
return(SocketError.NoData);
}
catch (SocketException exception)
{
NetDebug.LogError("Receive failed: " + exception.Message);
NetDebug.LogError(exception.StackTrace);
return(exception.SocketErrorCode);
}
}
}
public static void Assert(bool condition)
{
if (condition == false)
{
NetDebug.LogError("Assert Failed!");
}
}
public static void Assert(bool condition, object message)
{
if (condition == false)
{
NetDebug.LogError("Assert Failed: " + message);
}
}
/// <summary>
/// Queues a new notification to be send out reliably during ticks.
/// </summary>
internal bool QueueNotification(NetEvent data)
{
var notificationCount = outgoing.Count;
if (notificationCount >= NetConfig.MaxPendingNotifications)
{
NetDebug.LogError("Notification queue full");
return(false);
}
data.Sequence = notificationSeq++;
outgoing.Enqueue(data);
return(true);
}
private void HandleCarrier(
NetPeer peer,
byte[] buffer,
int length)
{
if (peer.IsConnected == false)
{
return;
}
// Read the carrier and notifications
ushort notificationAck;
ushort notificationSeq;
this.reusableQueue.Clear();
bool success =
NetEncoding.ReadCarrier(
this.CreateEvent,
peer,
buffer,
length,
out notificationAck,
out notificationSeq,
this.reusableQueue);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading carrier");
return;
}
long curTime = this.Time;
peer.OnReceiveCarrier(curTime, notificationAck, this.RecycleEvent);
// The packet contains the first sequence number. All subsequent
// notifications have sequence numbers in order, so we just increment.
foreach (NetEvent notification in this.reusableQueue)
{
if (peer.OnReceiveNotification(curTime, notificationSeq++))
{
this.eventOut.Enqueue(notification);
}
}
}
internal bool ReadData(byte[] sourceBuffer, int position, ushort length)
{
if (length > NetConfig.DATA_MAXIMUM)
{
NetDebug.LogError("Data too long for NetEvent");
return(false);
}
// Resize if necessary
int paddedLength = length + NetConfig.DATA_PADDING;
if (this.buffer.Length < paddedLength)
{
this.buffer = new byte[paddedLength];
}
// Copy the contents
Array.Copy(sourceBuffer, position, this.buffer, 0, length);
this.length = length;
return(true);
}
private void HandleKick(
NetPeer peer,
byte[] buffer,
int length)
{
if (peer.IsClosed)
{
return;
}
byte rawReason;
byte userReason;
bool success =
NetEncoding.ReadProtocol(
buffer,
length,
out rawReason,
out userReason);
// Validate
if (success == false)
{
NetDebug.LogError("Error reading kick");
return;
}
NetCloseReason closeReason = (NetCloseReason)rawReason;
// Skip the packet if it's a bad reason (this will cause error output)
if (NetUtil.ValidateKickReason(closeReason) == NetCloseReason.INVALID)
{
return;
}
peer.OnReceiveOther(this.Time);
this.ClosePeerSilent(peer);
this.eventOut.Enqueue(
this.CreateClosedEvent(peer, closeReason, userReason));
}