public int HandlePrefix(SocketAsyncEventArgs saea, DataToken dataToken, int remainingBytesToProcess)
{
if (remainingBytesToProcess >= 4 - dataToken.prefixBytesDone)
{
for (int i = 0; i < 4 - dataToken.prefixBytesDone; i++)
{
dataToken.byteArrayForPrefix[dataToken.prefixBytesDone + i] = saea.Buffer[dataToken.DataOffset + i];
}
remainingBytesToProcess = remainingBytesToProcess - 4 + dataToken.prefixBytesDone;
dataToken.bufferSkip += 4 - dataToken.prefixBytesDone;
dataToken.prefixBytesDone = 4;
dataToken.messageLength = BitConverter.ToInt32(dataToken.byteArrayForPrefix, 0);
}
else
{
for (int i = 0; i < remainingBytesToProcess; i++)
{
dataToken.byteArrayForPrefix[dataToken.prefixBytesDone + i] = saea.Buffer[dataToken.DataOffset + i];
}
dataToken.prefixBytesDone += remainingBytesToProcess;
remainingBytesToProcess = 0;
}
return remainingBytesToProcess;
}
private void ProcessSend(SocketAsyncEventArgs ioEventArgs)
{
DataToken dataToken = (DataToken)ioEventArgs.UserToken;
if (ioEventArgs.SocketError == SocketError.Success)
{
dataToken.messageBytesDone += ioEventArgs.BytesTransferred;
if (dataToken.messageBytesDone != dataToken.messageLength)
{
PostSend(ioEventArgs);
}
else
{
dataToken.Reset(true);
try
{
TryDequeueAndPostSend(dataToken.Socket, ioEventArgs);
}
catch
{
dataToken.Socket.ResetSendFlag();
throw;
}
}
}
else
{
dataToken.Socket.ResetSendFlag();
HandleCloseSocket(ioEventArgs);
}
}
private void TryDequeueAndPostSend(ExSocket socket, SocketAsyncEventArgs ioEventArgs)
{
bool isOwner = ioEventArgs == null;
byte[] data;
if (socket.TryDequeue(out data))
{
if (ioEventArgs == null)
{
ioEventArgs = ioEventArgsPool.Pop();
ioEventArgs.AcceptSocket = socket.WorkSocket;
}
DataToken dataToken = (DataToken)ioEventArgs.UserToken;
dataToken.Socket = socket;
dataToken.byteArrayForMessage = data;
dataToken.messageLength = data.Length;
try
{
PostSend(ioEventArgs);
}
catch
{
if (isOwner)
{
ReleaseIOEventArgs(ioEventArgs);
}
throw;
}
}
else
{
ReleaseIOEventArgs(ioEventArgs);
socket.ResetSendFlag();
}
}
private void IO_Completed(object sender, SocketAsyncEventArgs ioEventArgs)
{
try
{
DataToken ioDataToken = (DataToken)ioEventArgs.UserToken;
ioDataToken.Socket.LastAccessTime = DateTime.Now;
switch (ioEventArgs.LastOperation)
{
case SocketAsyncOperation.Receive:
ProcessReceive(ioEventArgs);
break;
case SocketAsyncOperation.Send:
ProcessSend(ioEventArgs);
break;
default:
throw new ArgumentException("The last operation completed on the socket was not a receive or send");
}
}
catch (ObjectDisposedException)
{
ReleaseIOEventArgs(ioEventArgs);
}
catch (Exception ex)
{
logger.Error("IO_Completed", ex);
}
}
public int HandleMessage(SocketAsyncEventArgs saea, DataToken dataToken, int remainingBytesToProcess)
{
if (dataToken.messageBytesDone == 0)
{
dataToken.byteArrayForMessage = new byte[dataToken.messageLength];
}
var nonCopiedBytes = 0;
if (remainingBytesToProcess + dataToken.messageBytesDone >= dataToken.messageLength)
{
var copyedBytes = dataToken.RemainByte;
nonCopiedBytes = remainingBytesToProcess - copyedBytes;
Buffer.BlockCopy(saea.Buffer, dataToken.DataOffset, dataToken.byteArrayForMessage, dataToken.messageBytesDone, copyedBytes);
dataToken.messageBytesDone = dataToken.messageLength;
dataToken.bufferSkip += copyedBytes;
}
else
{
Buffer.BlockCopy(saea.Buffer, dataToken.DataOffset, dataToken.byteArrayForMessage, dataToken.messageBytesDone, remainingBytesToProcess);
dataToken.messageBytesDone += remainingBytesToProcess;
}
return(nonCopiedBytes);
}
public int HandlePrefix(SocketAsyncEventArgs saea, DataToken dataToken, int remainingBytesToProcess)
{
if (remainingBytesToProcess >= 4 - dataToken.prefixBytesDone)
{
for (int i = 0; i < 4 - dataToken.prefixBytesDone; i++)
{
dataToken.byteArrayForPrefix[dataToken.prefixBytesDone + i] = saea.Buffer[dataToken.DataOffset + i];
}
remainingBytesToProcess = remainingBytesToProcess - 4 + dataToken.prefixBytesDone;
dataToken.bufferSkip += 4 - dataToken.prefixBytesDone;
dataToken.prefixBytesDone = 4;
dataToken.messageLength = BitConverter.ToInt32(dataToken.byteArrayForPrefix, 0);
}
else
{
for (int i = 0; i < remainingBytesToProcess; i++)
{
dataToken.byteArrayForPrefix[dataToken.prefixBytesDone + i] = saea.Buffer[dataToken.DataOffset + i];
}
dataToken.prefixBytesDone += remainingBytesToProcess;
remainingBytesToProcess = 0;
}
return(remainingBytesToProcess);
}
public void Connect()
{
socket = new Socket(this.clientSettings.RemoteEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
socket.Connect(this.clientSettings.RemoteEndPoint);
connected = true;
var buffer = new byte[this.clientSettings.BufferSize * 2];
this.sendEventArg = new SocketAsyncEventArgs();
this.sendEventArg.SetBuffer(buffer, 0, this.clientSettings.BufferSize);
this.sendDataToken = new DataToken();
this.sendDataToken.bufferOffset = this.sendEventArg.Offset;
this.sendEventArg.UserToken = this.sendDataToken;
this.sendEventArg.AcceptSocket = socket;
this.sendEventArg.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
this.receiveEventArg = new SocketAsyncEventArgs();
this.receiveEventArg.SetBuffer(buffer, this.clientSettings.BufferSize, this.clientSettings.BufferSize);
this.receiveDataToken = new DataToken();
this.receiveDataToken.bufferOffset = this.receiveEventArg.Offset;
this.receiveEventArg.UserToken = this.receiveDataToken;
this.receiveEventArg.AcceptSocket = socket;
this.receiveEventArg.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
PostReceive();
}
private void IO_Completed(object sender, SocketAsyncEventArgs e)
{
try
{
DataToken ioDataToken = (DataToken)e.UserToken;
switch (e.LastOperation)
{
case SocketAsyncOperation.Receive:
ProcessReceive();
break;
case SocketAsyncOperation.Send:
ProcessSend();
break;
default:
throw new ArgumentException("The last operation completed on the socket was not a receive or send");
}
}
catch (ObjectDisposedException) { }
catch (Exception ex)
{
logger.Error("IO_Completed", ex);
}
}
private void TryDequeueAndPostSend()
{
byte[] data;
if (sendQueue.TryDequeue(out data))
{
DataToken dataToken = sendDataToken;
dataToken.byteArrayForMessage = data;
dataToken.messageLength = data.Length;
PostSend();
}
else
{
ResetSendFlag();
}
}
private void PostSend(SocketAsyncEventArgs ioEventArgs)
{
DataToken dataToken = (DataToken)ioEventArgs.UserToken;
if (dataToken.messageLength - dataToken.messageBytesDone <= this.socketSettings.BufferSize)
{
ioEventArgs.SetBuffer(dataToken.bufferOffset, dataToken.messageLength - dataToken.messageBytesDone);
Buffer.BlockCopy(dataToken.byteArrayForMessage, dataToken.messageBytesDone, ioEventArgs.Buffer, dataToken.bufferOffset, dataToken.messageLength - dataToken.messageBytesDone);
}
else
{
ioEventArgs.SetBuffer(dataToken.bufferOffset, this.socketSettings.BufferSize);
Buffer.BlockCopy(dataToken.byteArrayForMessage, dataToken.messageBytesDone, ioEventArgs.Buffer, dataToken.bufferOffset, this.socketSettings.BufferSize);
}
var willRaiseEvent = ioEventArgs.AcceptSocket.SendAsync(ioEventArgs);
if (!willRaiseEvent)
{
ProcessSend(ioEventArgs);
}
}
private void Init()
{
this.bufferManager.InitBuffer();
for (int i = 0; i < this.socketSettings.MaxAcceptOps; i++)
{
this.acceptEventArgsPool.Push(CreateAcceptEventArgs());
}
SocketAsyncEventArgs ioEventArgs;
for (int i = 0; i < this.socketSettings.NumOfSaeaForRecSend; i++)
{
ioEventArgs = new SocketAsyncEventArgs();
this.bufferManager.SetBuffer(ioEventArgs);
ioEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
DataToken dataToken = new DataToken();
dataToken.bufferOffset = ioEventArgs.Offset;
ioEventArgs.UserToken = dataToken;
this.ioEventArgsPool.Push(ioEventArgs);
}
}
public int HandleMessage(SocketAsyncEventArgs saea, DataToken dataToken, int remainingBytesToProcess)
{
if (dataToken.messageBytesDone == 0)
{
dataToken.byteArrayForMessage = new byte[dataToken.messageLength];
}
var nonCopiedBytes = 0;
if (remainingBytesToProcess + dataToken.messageBytesDone >= dataToken.messageLength)
{
var copyedBytes = dataToken.RemainByte;
nonCopiedBytes = remainingBytesToProcess - copyedBytes;
Buffer.BlockCopy(saea.Buffer, dataToken.DataOffset, dataToken.byteArrayForMessage, dataToken.messageBytesDone, copyedBytes);
dataToken.messageBytesDone = dataToken.messageLength;
dataToken.bufferSkip += copyedBytes;
}
else
{
Buffer.BlockCopy(saea.Buffer, dataToken.DataOffset, dataToken.byteArrayForMessage, dataToken.messageBytesDone, remainingBytesToProcess);
dataToken.messageBytesDone += remainingBytesToProcess;
}
return nonCopiedBytes;
}
/// <summary>
/// 处理数据接收回调
/// </summary>
/// <param name="ioEventArgs"></param>
private void ProcessReceive(SocketAsyncEventArgs ioEventArgs)
{
DataToken dataToken = (DataToken)ioEventArgs.UserToken;
if (ioEventArgs.SocketError != SocketError.Success)
{
//Socket错误
if (logger.IsDebugEnabled)
{
logger.Debug("ProcessReceive:{0}", ioEventArgs.SocketError);
}
HandleCloseSocket(ioEventArgs);
return;
}
if (ioEventArgs.BytesTransferred == 0)
{
//对方主动关闭socket
if (logger.IsDebugEnabled)
{
logger.Debug("对方关闭Socket");
}
HandleCloseSocket(ioEventArgs);
return;
}
var exSocket = dataToken.Socket;
#region 数据解析
List <byte[]> msgs = new List <byte[]>();
int remainingBytesToProcess = ioEventArgs.BytesTransferred;
bool needPostAnother = true;
do
{
if (dataToken.prefixBytesDone < 4)
{
remainingBytesToProcess = prefixHandler.HandlePrefix(ioEventArgs, dataToken, remainingBytesToProcess);
if (dataToken.prefixBytesDone == 4 && (dataToken.messageLength > 10 * 1024 * 1024 || dataToken.messageLength <= 0))
{
//消息头已接收完毕，并且接收到的消息长度大于10M，socket传输的数据已紊乱，关闭掉
logger.Warn("接收到的消息长度错误:{0}", dataToken.messageLength);
needPostAnother = false;
HandleCloseSocket(ioEventArgs);
break;
}
if (logger.IsDebugEnabled)
{
logger.Debug("处理消息头，消息长度[{0}]，剩余字节[{1}]", dataToken.messageLength, remainingBytesToProcess);
}
if (remainingBytesToProcess == 0)
{
break;
}
}
remainingBytesToProcess = messageHandler.HandleMessage(ioEventArgs, dataToken, remainingBytesToProcess);
if (dataToken.IsMessageReady)
{
if (logger.IsDebugEnabled)
{
logger.Debug("完整封包 长度[{0}],总传输[{1}],剩余[{2}]", dataToken.messageLength, ioEventArgs.BytesTransferred, remainingBytesToProcess);
}
msgs.Add(dataToken.byteArrayForMessage);
if (remainingBytesToProcess != 0)
{
if (logger.IsDebugEnabled)
{
logger.Debug("重置缓冲区,buffskip指针[{0}]。", dataToken.bufferSkip);
}
dataToken.Reset(false);
}
}
else
{
if (logger.IsDebugEnabled)
{
logger.Debug("不完整封包 长度[{0}],总传输[{1}],已接收[{2}]", dataToken.messageLength, ioEventArgs.BytesTransferred, dataToken.messageBytesDone);
}
}
} while (remainingBytesToProcess != 0);
#endregion
if (needPostAnother)
{
if (dataToken.prefixBytesDone == 4 && dataToken.IsMessageReady)
{
dataToken.Reset(true);
}
dataToken.bufferSkip = 0;
PostReceive(ioEventArgs);
}
foreach (var m in msgs)
{
try
{
OnDataReceived(new ConnectionEventArgs {
Socket = exSocket, Data = m
});
}
catch (Exception ex)
{
logger.Error("OnDataReceived", ex);
}
}
}
private void Init()
{
this.bufferManager.InitBuffer();
for (int i = 0; i < this.socketSettings.MaxAcceptOps; i++)
{
this.acceptEventArgsPool.Push(CreateAcceptEventArgs());
}
SocketAsyncEventArgs ioEventArgs;
for (int i = 0; i < this.socketSettings.NumOfSaeaForRecSend; i++)
{
ioEventArgs = new SocketAsyncEventArgs();
this.bufferManager.SetBuffer(ioEventArgs);
ioEventArgs.Completed += new EventHandler<SocketAsyncEventArgs>(IO_Completed);
DataToken dataToken = new DataToken();
dataToken.bufferOffset = ioEventArgs.Offset;
ioEventArgs.UserToken = dataToken;
this.ioEventArgsPool.Push(ioEventArgs);
}
}
public void Connect()
{
socket = new Socket(this.clientSettings.RemoteEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
socket.Connect(this.clientSettings.RemoteEndPoint);
connected = true;
var buffer = new byte[this.clientSettings.BufferSize * 2];
this.sendEventArg = new SocketAsyncEventArgs();
this.sendEventArg.SetBuffer(buffer, 0, this.clientSettings.BufferSize);
this.sendDataToken = new DataToken();
this.sendDataToken.bufferOffset = this.sendEventArg.Offset;
this.sendEventArg.UserToken = this.sendDataToken;
this.sendEventArg.AcceptSocket = socket;
this.sendEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(IO_Completed);
this.receiveEventArg = new SocketAsyncEventArgs();
this.receiveEventArg.SetBuffer(buffer, this.clientSettings.BufferSize, this.clientSettings.BufferSize);
this.receiveDataToken = new DataToken();
this.receiveDataToken.bufferOffset = this.receiveEventArg.Offset;
this.receiveEventArg.UserToken = this.receiveDataToken;
this.receiveEventArg.AcceptSocket = socket;
this.receiveEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(IO_Completed);
PostReceive();
}