//获取客户端信息列表中指定远程端点的项
private AsyncSocketClientMsg GetClientMsg(List <AsyncSocketClientMsg> clientMsg, EndPoint endpoint)
{
AsyncSocketClientMsg cm = null;
foreach (var item in clientMsg)
{
if (item.remote.ToString() == endpoint.ToString())
{
cm = item;
break;
}
}
return(cm);
}
private void ReceiveDataAsync(IAsyncResult Idata)
{
int recv = _serverSock.EndReceiveFrom(Idata, ref so.remote);
if (!isLegal(so.remote))
{
so.ClearBuffer();
_serverSock.BeginReceiveFrom(so.buffer, 0, so.buffer.Length, SocketFlags.None, ref so.remote, new AsyncCallback(ReceiveDataAsync), so.remote);
return;
}
string receiveData = Encoding.ASCII.GetString(so.buffer, 0, recv);
DataAnalyze op = new DataAnalyze();
string result = op.DataAnalyzeResult(receiveData);//获取数据库操作结果
if (op.GetSqlOrder() != null)
{
AsyncSocketClientMsg sendMeg = new AsyncSocketClientMsg(so.remote, result);
//发送第一个子数据报
byte[] resultByte = Encoding.ASCII.GetBytes(result);
byte[] sendData = new byte[1024];
int copylen = (resultByte.Length > 1020) ? 1020 : resultByte.Length;
Buffer.BlockCopy(resultByte, 0, sendData, 4, copylen);
sendData[0] = (byte)(sendMeg.DgramNum / 256);
sendData[1] = (byte)(sendMeg.DgramNum % 256);
sendData[2] = 0x00;
sendData[3] = 0x01;
_serverSock.BeginSendTo(sendData, 0, sendData.Length, SocketFlags.None, so.remote, new AsyncCallback(SendData), so.remote);
lock (clientMsg)
{
clientMsg.Remove(GetClientMsg(clientMsg, so.remote));//删除重复请求客户端信息
clientMsg.Add(sendMeg);
}
}
else
{
int senOrder = GetDgramOrder(so.buffer);
AsyncSocketClientMsg recClient = GetClientMsg(clientMsg, so.remote);
if (recClient != null)
{
if (recClient.DgramNum <= senOrder)//检测是否发送完成:发送完成
{
lock (clientMsg)
{
clientMsg.Remove(recClient);
}
}
else//发送未完成
{
byte[] resultByte = Encoding.ASCII.GetBytes(recClient.sendMeg);
byte[] sendData = new byte[1024];
int copyLength = (recClient.DgramNum == (senOrder + 1)) ? resultByte.Length % 1020 : 1020;//每次发送的字节数
Buffer.BlockCopy(resultByte, senOrder * 1020, sendData, 4, copyLength);
sendData[0] = (byte)(recClient.DgramNum / 256);
sendData[1] = (byte)(recClient.DgramNum % 256);
sendData[2] = (byte)((senOrder + 1) / 256);
sendData[3] = (byte)((senOrder + 1) % 256);
_serverSock.BeginSendTo(sendData, 0, sendData.Length, SocketFlags.None, so.remote, new AsyncCallback(SendData), so.remote);
}
}
}
so.ClearBuffer();
_serverSock.BeginReceiveFrom(so.buffer, 0, so.buffer.Length, SocketFlags.None, ref so.remote, new AsyncCallback(ReceiveDataAsync), so.remote);
}