/// <summary>
/// receive/send message complete an asynchronous operation
/// </summary>
/// <param name="sender"></param>
/// <param name="asyncEventArgs"></param>
void IO_Completed(object sender, SocketAsyncEventArgs asyncEventArgs)
{
AsyncSocketUserToken userToken = asyncEventArgs.UserToken as AsyncSocketUserToken;
try
{
lock (userToken)
{
if (asyncEventArgs.LastOperation == SocketAsyncOperation.Receive)
{
userToken.ActiveDateTime = DateTime.Now;
ProcessReceive(asyncEventArgs);
}
else if (asyncEventArgs.LastOperation == SocketAsyncOperation.Send)
{
ProcessSend(asyncEventArgs);
}
else
{
throw new ArgumentException(
"The last operation completed on the socket was not a receive or send");
}
}
}
catch (Exception E)
{
Program.Logger.ErrorFormat("IO_Completed {0} error, message: {1}", userToken.ConnectSocket, E.Message);
Program.Logger.Error(E.StackTrace);
Console.WriteLine("IO_Completed {0} error, message: {1}", userToken.ConnectSocket, E.Message);
Console.WriteLine(E.StackTrace);
}
}
public void Remove(AsyncSocketUserToken userToken)
{
lock (m_list)
{
m_list.Remove(userToken);
}
}
public void CloseClientSocket(AsyncSocketUserToken userToken)
{
if (userToken.ConnectSocket == null)
{
return;
}
string socketInfo = string.Format("Local Address: {0} Remote Address: {1}", userToken.ConnectSocket.LocalEndPoint,
userToken.ConnectSocket.RemoteEndPoint);
Program.Logger.InfoFormat("Client connection disconnected. {0}", socketInfo);
Console.WriteLine("Client connection disconnected. {0}", socketInfo);
try
{
userToken.ConnectSocket.Shutdown(SocketShutdown.Both);
}
catch (Exception E)
{
Program.Logger.ErrorFormat("CloseClientSocket Disconnect client {0} error, message: {1}", socketInfo, E.Message);
Console.WriteLine("CloseClientSocket Disconnect client {0} error, message: {1}", socketInfo, E.Message);
}
userToken.ConnectSocket.Close();
userToken.ConnectSocket = null; //释放引用，并清理缓存，包括释放协议对象等资源
m_maxNumberAcceptedClients.Release();
m_asyncSocketUserTokenPool.Push(userToken);
m_asyncSocketUserTokenList.Remove(userToken);
}
public void Add(AsyncSocketUserToken userToken)
{
lock (m_list)
{
m_list.Add(userToken);
}
}
public void CopyList(ref AsyncSocketUserToken[] array)
{
lock (m_list)
{
array = new AsyncSocketUserToken[m_list.Count];
m_list.CopyTo(array);
}
}
public void Push(AsyncSocketUserToken item)
{
if (item == null)
{
throw new ArgumentException("Items added to a AsyncSocketUserToken cannot be null");
}
lock (m_pool)
{
m_pool.Push(item);
}
}
/// <summary>
/// 根据最大连接数，，初始化SOCKET连接池，并入栈，完成端口绑定RECIVE/SEND
/// </summary>
public void Init()
{
//预分配一组，可以重复使用的SOCKET连接池
AsyncSocketUserToken userToken;
for (int i = 0; i < m_numConnections; i++) //按照连接数建立读写对象
{
userToken = new AsyncSocketUserToken(m_receiveBufferSize);
userToken.ReceiveEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
userToken.SendEventArgs.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
m_asyncSocketUserTokenPool.Push(userToken);
}
}
/// <summary>
/// 协议类绑定
/// </summary>
/// <param name="userToken"></param>
private void BuildingSocketInvokeElement(AsyncSocketUserToken userToken)
{
//todo：可以根据端口绑定相应的处理协议，待添加
//气体传感器协议
// userToken.AsyncSocketInvokeElement = new HWSmellSensor(this,userToken);
//土壤传感器协议
userToken.AsyncSocketInvokeElement = new LHSoilSensor(this, userToken);
if (userToken.AsyncSocketInvokeElement != null)
{
Program.Logger.InfoFormat("Building socket invoke element {0}.Local Address: {1}, Remote Address: {2}",
userToken.AsyncSocketInvokeElement, userToken.ConnectSocket.LocalEndPoint, userToken.ConnectSocket.RemoteEndPoint);
}
}
private void ProcessReceive(SocketAsyncEventArgs receiveEventArgs)
{
// Console.WriteLine("begin ProcessReceive ");
AsyncSocketUserToken userToken = receiveEventArgs.UserToken as AsyncSocketUserToken;
if (userToken.ConnectSocket == null)
{
return;
}
userToken.ActiveDateTime = DateTime.Now;
if (userToken.ReceiveEventArgs.BytesTransferred > 0 && userToken.ReceiveEventArgs.SocketError == SocketError.Success)
{
int offset = userToken.ReceiveEventArgs.Offset;
int count = userToken.ReceiveEventArgs.BytesTransferred;
if ((userToken.AsyncSocketInvokeElement == null) & (userToken.ConnectSocket != null)) //存在Socket对象，并且没有绑定协议对象，则进行协议对象绑定
{
//todo:根据端口绑定协议对像
BuildingSocketInvokeElement(userToken);
}
if (count > 0) //处理接收数据
{
if (!userToken.AsyncSocketInvokeElement.ProcessReceive(userToken.ReceiveEventArgs.Buffer, offset, count))
{ //如果处理数据返回失败，则断开连接
CloseClientSocket(userToken);
}
else //否则投递下次接受数据请求
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
else
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
else
{
CloseClientSocket(userToken);
}
//Console.WriteLine("end ProcessReceive ");
}
public AsyncSocketInvokeElement(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
{
m_asyncSocketServer = asyncSocketServer;
// AsyncSocketUserToken.SendAsyncState = false;
m_asyncSocketUserToken = asyncSocketUserToken;
m_netByteOrder = false;
m_incomingDataParser = new IncomingDataParser();
m_outgoingDataAssembler = new OutgoingDataAssembler();
m_sendAsync = false;
m_connectDT = DateTime.UtcNow;
m_activeDT = DateTime.UtcNow;
}
private bool ProcessSend(SocketAsyncEventArgs sendEventArgs)
{
AsyncSocketUserToken userToken = sendEventArgs.UserToken as AsyncSocketUserToken;
if (userToken.AsyncSocketInvokeElement == null)
{
return(false);
}
// userToken.ActiveDateTime = DateTime.Now;
if (sendEventArgs.SocketError == SocketError.Success)
{
return(userToken.AsyncSocketInvokeElement.SendCompleted()); //调用子类回调函数
}
else
{
CloseClientSocket(userToken);
return(false);
}
}
/// <summary>
/// 处理接收到的SOCKET，添加至连接表，并投递接收请求。
/// </summary>
/// <param name="acceptEventArgs"></param>
private void ProcessAccept(SocketAsyncEventArgs acceptEventArgs)
{
Console.WriteLine(System.DateTime.Now + " ProcessAccept");
Program.Logger.InfoFormat("Client connection accepted. Local Address: {0}, Remote Address: {1}",
acceptEventArgs.AcceptSocket.LocalEndPoint, acceptEventArgs.AcceptSocket.RemoteEndPoint);
Console.WriteLine("Client connection accepted. Local Address: {0}, Remote Address: {1}",
acceptEventArgs.AcceptSocket.LocalEndPoint, acceptEventArgs.AcceptSocket.RemoteEndPoint);
AsyncSocketUserToken userToken = m_asyncSocketUserTokenPool.Pop();
m_asyncSocketUserTokenList.Add(userToken); //添加到正在连接列表
userToken.ConnectSocket = acceptEventArgs.AcceptSocket;
userToken.ConnectDateTime = DateTime.Now;
//todo:后期需要根据收到的心跳包特殊定制：
userToken.StrQueryCommand = "0102030405060708090001020304050607080900";
try
{
bool willRaiseEvent = userToken.ConnectSocket.ReceiveAsync(userToken.ReceiveEventArgs); //投递接收请求
if (!willRaiseEvent)
{
lock (userToken)
{
ProcessReceive(userToken.ReceiveEventArgs);
}
}
}
catch (Exception E)
{
Program.Logger.ErrorFormat("Accept client {0} error, message: {1}", userToken.ConnectSocket, E.Message);
Program.Logger.Error(E.StackTrace);
Console.WriteLine("Accept client {0} error, message: {1}", userToken.ConnectSocket, E.Message);
}
StartAccept(acceptEventArgs); //把当前异步事件释放，等待下次连接
}
