/// <summary>
/// 发送指令
/// </summary>
private void SendCmd(VideoTransferProtocolKey protocolKey)
{
lock (queueLocker)
{
tcpSendQueue.Enqueue(protocolKey);
}
}
/// <summary>
/// 处理TCP接收的数据
/// </summary>
/// <param name="datas">所收数据</param>
private void DealWithTcpTransferRecieveDatas(byte[] datas)
{
if (datas.Length < 4)
{
return; // 长度不可能出现
}
if (datas[0] != (byte)VideoTransferProtocolKey.Header1 ||
datas[1] != (byte)VideoTransferProtocolKey.Header2)
{
return; // 协议头不匹配
}
byte deviceIndex = datas[2];
VideoTransferProtocolKey workCmd = (VideoTransferProtocolKey)datas[3];
switch (workCmd)
{
case VideoTransferProtocolKey.RSAKey:
int keyLength = Convert.ToInt32(
IPAddress.NetworkToHostOrder(
BitConverter.ToInt32(datas, 4)));
if (keyLength != datas.Length - 8)
{
return; // 长度不匹配
}
remoteDeviceIndex = deviceIndex;
remoteDevicePublicKey = Encoding.UTF8.GetString(datas, 8, keyLength);
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "RSAKey saved.");
// 发送AES密钥
SendAESKey();
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "AESKey sent.");
break;
case VideoTransferProtocolKey.BeginTransferVideo:
if (!ifGetVideoSendCmdOnce && remoteDeviceIndex == deviceIndex)
{
// 若未收到过发送视频指令 打开UDP传输定时器
ifGetVideoSendCmdOnce = true;
camera = new Capture(cameraIndex);
camera.SetCaptureProperty(CapProp.Fps, cameraFps);
camera.SetCaptureProperty(CapProp.FrameHeight, cameraHeight);
camera.SetCaptureProperty(CapProp.FrameWidth, cameraWidth);
// 重置标志
udpTransferSendQueue.Clear();
packIndex = 0;
udpSendClocker.Start();
udpTransferCancel = new CancellationTokenSource();
udpTransferSendTask = new Task(() => UdpTransferSendTaskWork(udpTransferCancel.Token));
udpTransferSendTask.Start();
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "Begin send video.");
}
break;
case VideoTransferProtocolKey.PingSignal:
if (remoteDeviceIndex != deviceIndex)
{
return; // 设备号不匹配
}
tcpBeatClocker.Stop();
tcpBeatClocker.Start();
break;
case VideoTransferProtocolKey.EndTransferVideo:
if (ifGetVideoSendCmdOnce && remoteDeviceIndex == deviceIndex)
{
// 若收到过发送视频指令 准备关闭连接
EndAllLoop();
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "End send video.");
}
break;
default:
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "No such control command.");
break;
}
}
/// <summary>
/// TCP发送队列数据任务
/// </summary>
/// <param name="cancelFlag">停止标志</param>
private void TcpTransferSendTaskWork(CancellationToken cancelFlag)
{
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "WinForm video client tcp transfer begins to send datas.");
while (true)
{
if (cancelFlag.IsCancellationRequested)
{
break;
}
Thread.Sleep(sleepMsForQueueSend);
VideoTransferProtocolKey waitSentKey = VideoTransferProtocolKey.VideoTransfer;
lock (queueLocker)
{
if (tcpSendQueue.Count > 0)
{
waitSentKey = tcpSendQueue.Dequeue();
}
}
if (waitSentKey == VideoTransferProtocolKey.VideoTransfer)
{
continue;
}
List <byte> sendBytes = new List <byte>(4);
sendBytes.Add((byte)VideoTransferProtocolKey.Header1);
sendBytes.Add((byte)VideoTransferProtocolKey.Header2);
sendBytes.Add(clientDeviceIndex);
sendBytes.Add((byte)waitSentKey);
if (waitSentKey == VideoTransferProtocolKey.RSAKey)
{
byte[] publicKeyBytes = Encoding.UTF8.GetBytes(publicKey);
sendBytes.AddRange(BitConverter.GetBytes(IPAddress.HostToNetworkOrder(publicKeyBytes.Length)));
sendBytes.AddRange(publicKeyBytes);
}
try
{
tcpTransferSocket.Send(sendBytes.ToArray());
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.ConnectionReset || ex.SocketErrorCode == SocketError.ConnectionAborted || ex.SocketErrorCode == SocketError.TimedOut)
{
EndAllLoop();
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "WinForm video client tcp transfer send datas failed.", ex);
}
else
{
Logger.HistoryPrinting(Logger.Level.WARN, MethodBase.GetCurrentMethod().DeclaringType.FullName, "Not deal exception.", ex);
throw ex;
}
}
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "WinForm video client tcp transfer send cmd '" + waitSentKey.ToString() + "'.");
}
FinishAllConnection();
ifTcpConnectionEstablished = false;
Logger.HistoryPrinting(Logger.Level.INFO, MethodBase.GetCurrentMethod().DeclaringType.FullName, "WinForm video client tcp transfer stops to send datas.");
}
