private void SendUpdateStatePacket(UpdateState state, User user, IPAddress brdIp)
{
UdpPacket packet = new UdpPacket();
packet.Address = user.Address;
packet.Port = user.Port;
packet.ToMAC = "";
packet.FromMAC = user.ID;
packet.Command = UdpPacket.CMD_STATE;
UdpPacketUserStateExtend entryExtend = new UdpPacketUserStateExtend();
entryExtend.User = user;
entryExtend.UpdateState = state;
packet.Extend = entryExtend;
UdpPacket packetWrap = new UdpPacket();
packetWrap.Address = brdIp;
packetWrap.Port = this.Port;
packetWrap.ToMAC = "";
packetWrap.FromMAC = this.MAC;
packetWrap.Command = UdpPacket.CMD_RETRANSMIT;
IPacketEncoder encoder = PacketEncoderFactory.CreateEncoder(packet);
EncodeResult result = encoder.Encode();
UdpPacketRetransExtend extend = new UdpPacketRetransExtend(result.Fragments[0]);
packetWrap.Extend = extend;
_client.Send(packetWrap);
}
public void Receive(TransportFile file)
{
TaskFactory taskFactory = new TaskFactory();
taskFactory.StartNew(() =>
{
LoggerFactory.Debug("start receive file:id={0}", file.ID);
string tmpPath = file.SavePath + "." + Path.GetRandomFileName().Replace(".", "") + ".lamim";
FileStream fs = null;
try
{
fs = new FileStream(tmpPath, FileMode.Create);
}
catch (Exception e)
{
OnError(Errors.FileOpenError, "打开文件失败:" + tmpPath, file, e);
return;
}
LoggerFactory.Debug("opened file:" + tmpPath);
LoggerFactory.Debug("try connect remote:remote={0}, port={1}", file.Remote, file.Port);
TcpClient tcpClient = null;
NetworkStream ns = null;
try
{
tcpClient = new TcpClient(AddressFamily.InterNetwork)
{
ReceiveBufferSize = this.ReceiveBufferSize
};
tcpClient.Connect(file.Remote, file.Port);
ns = tcpClient.GetStream();
}
catch (Exception e)
{
OnError(Errors.NetworkError, "连接失败", file, e);
return;
}
LoggerFactory.Debug("conneted remote:remote={0}, port={1}", file.Remote, file.Port);
LoggerFactory.Debug("encode packet, request file:id={0}", file.ID);
TcpPacket packet = null;
EncodeResult result = null;
try
{
//发送要接受的文件ID
TcpPacketRequestFileTransportExtend extend = new TcpPacketRequestFileTransportExtend
{
EncryptKey = file.PublicKey,
FileID = file.ID
};
packet = new TcpPacket
{
Command = TcpPacket.CMD_REQUEST_FILE_TRANSPORT,
Extend = extend
};
IPacketEncoder encoder = PacketEncoderFactory.CreateEncoder(packet);
result = encoder.Encode(null);
}
catch (Exception e)
{
OnError(Errors.EncodeError, "请求文件ID包加密失败。" + packet.ToString(), file, e);
return;
}
LoggerFactory.Debug("send packet, request file:id={0}", file.ID);
try
{
ns.Write(result.Fragments[0], 0, result.Fragments[0].Length);
}
catch (Exception e)
{
OnError(Errors.NetworkError, "请求文件ID包发送失败", file, e);
return;
}
LoggerFactory.Debug("receive file start:id={0}", file.ID);
try
{
int len = 0;
file.StartTransport();
long lastProgressTicks = file.NowTransportTicks;
byte[] buff = new byte[this.ReceiveBufferSize];
while ((len = ns.Read(buff, 0, buff.Length)) != 0)
{
fs.Write(buff, 0, len);
file.Transported(len);
if (file.TransportedLength == file.File.Length ||
(DateTime.Now.Ticks - lastProgressTicks) > this._progressChangeInterval) //避免进度太频繁，500ms一次
{
OnProgressChanged(file);
lastProgressTicks = file.NowTransportTicks;
}
}
LoggerFactory.Debug("receive file end:id={0}", file.ID);
}
catch (Exception e)
{
OnError(Errors.NetworkError, "文件接收失败", file, e);
}
finally
{
LoggerFactory.Debug("close connect and save file:id={0}", file.ID);
//关闭连接
ns.Close();
tcpClient.Close();
fs.Flush(true);
fs.Close();
if (LanFile.Rename(tmpPath, file.SavePath))
{
//发送接收完毕
OnCompleted(file);
}
else
{
OnError(Errors.FileWriteError, "文件写入失败", file, null);
}
}
LoggerFactory.Debug("end receive file:id={0}", file.ID);
});
}
public void Send(UdpPacket packet)
{
if (this._state != ClientState.Working)
{
return;
}
//异步发送
IPEndPoint remoteIpEp = new IPEndPoint(packet.Address, packet.Port);
packet.GenerateID();
LoggerFactory.Debug("parepare send packet:{0}", packet);
EncodeResult result = null;
try
{
IPacketEncoder encoder = PacketEncoderFactory.CreateEncoder(packet);
LoggerFactory.Debug("get encoder:{0}", encoder.GetType().Name);
result = encoder.Encode(null);
LoggerFactory.Debug("encode packet:{0}", result);
if (result.Length > UDP_MAX_BUF_SIZE)
{
//超过大小的分包处理
MultiUdpPacket mpacket = new MultiUdpPacket(result.Fragments[0]);
mpacket.ID = packet.ID;
mpacket.ParentID = packet.ID;
encoder = PacketEncoderFactory.CreateEncoder(mpacket);
LoggerFactory.Debug("get encoder:{0}", encoder.GetType().Name);
result = encoder.Encode(UDP_MAX_BUF_SIZE - MultiUdpPacket.HEAD_SIZE);
LoggerFactory.Debug("encode packet:{0}", result);
}
}
catch (Exception e)
{
OnSendPackage(packet, false);
OnError(Errors.EncodeError, "加密包错误。", e);
}
try
{
for (int i = 0; i < result.Fragments.Count; i++)
{
byte[] buf = result.Fragments[i];
SendState state = new SendState();
state.LastPacket = i == result.Fragments.Count - 1;
state.Packet = packet;
_client.BeginSend(buf, buf.Length, remoteIpEp, new AsyncCallback(AsyncSendHandler), state);
Thread.Sleep(20);//稍微等待一下，避免丢包
}
}
catch (Exception e)
{
OnSendPackage(packet, false);
OnError(Errors.NetworkError, "发送包错误。", e);
}
}
