/*
* StartFileRequest
* This method Creates FileRequest packet, and Enqueues it in Send Queue
* fileName shouldn't be longer than 256 bytes ( throws ArgumentException if filename is too long, or '0')
* This method will call ReadFilePackets after execution
* Data0: userID LSB
* Data1: userID MSB
* Data2: userID
* Data3: userID
* Data4: fileNameArray Length
* Data5~Data(3+fileNameArray Length) : fileNameArray
*/
internal override void StartFileRequest(string fileName, FileType fileType)
{
byte[] fileNameArray = Encoding.ASCII.GetBytes(fileName);
uint userId = UserToken.UserId;
if (fileNameArray.Length > 256 || fileNameArray.Length == 0)
{
throw new ArgumentException("Filename is too long");
}
Packet fileRequestpacket = new Packet
{
RequestType = (byte)PacketType.FileRequest,
FileType = (byte)fileType,
MorePackets = false,
PacketNumber = 0,
DataSize = (byte)(fileNameArray.Length + 5), // Additional 3 for userID and fileName length
ProcessId = Pid
};
fileRequestpacket.Data = new byte[fileRequestpacket.DataSize];
MakePacketHeader(fileRequestpacket); //Sets packet Header
fileRequestpacket.Data[0] = (byte)(userId & 0xFF); // first and second bytes are for user ID
fileRequestpacket.Data[1] = (byte)((userId >> 8) & 0xFF);
fileRequestpacket.Data[2] = (byte)((userId >> 16) & 0xFF);
fileRequestpacket.Data[3] = (byte)((userId >> 24) & 0xFF);
fileRequestpacket.Data[4] = (byte)fileNameArray.Length; // File length
Array.Copy(fileNameArray, 0, fileRequestpacket.Data, 5,
fileNameArray.Length); // Copy file name to packet Data (from index 5)
UserToken.EnqueueSend(fileRequestpacket); // Enqueue the Request packet to Sender
ReadFilePackets(); // Start reading packets
}
internal override void StartIdRequest()
{
Packet requestIdPacket = new Packet()
{
Data = new byte[1],
DataSize = 1,
FileType = (byte)FileType.NoFile,
MorePackets = false,
PacketNumber = 0,
ProcessId = Pid,
RequestType = (byte)PacketType.IdRequest
};
MakePacketHeader(requestIdPacket);
requestIdPacket.Data[0] = (byte)PacketType.IdRequest;
UserToken.EnqueueSend(requestIdPacket);
ReceiveId();
}
internal override void StartFileSend(string fileName, FileType fileType, byte[] fileData)
{
int fileSize = fileData.Length;
int sourceOffset = 0;
Packet fileInfoPacket = new Packet
{
PacketNumber = 0,
RequestType = (byte)PacketType.FileInfo,
FileType = (byte)fileType,
MorePackets = true,
ProcessId = Pid
};
fileInfoPacket.DataSize =
(uint)MakeFileDataInfo(fileInfoPacket, (uint)fileSize, fileName, UserToken.UserId);
MakePacketHeader(fileInfoPacket);
UserToken.EnqueueSend(fileInfoPacket);
ushort packetNum = 1;
while (sourceOffset < fileSize)
{
int copySize = PacketConsts.ReceiverBufferSize;
Packet packet = new Packet
{
PacketNumber = packetNum,
RequestType = (byte)PacketType.File,
FileType = (byte)fileType,
MorePackets = true,
ProcessId = Pid
};
packetNum += 1;
if (copySize > fileSize - sourceOffset)
{
copySize = fileSize - sourceOffset;
packet.MorePackets = false;
}
packet.DataSize = (uint)copySize;
MakePacketHeader(packet);
packet.Data = new byte[copySize];
Array.Copy(fileData, sourceOffset, packet.Data, 0, copySize);
UserToken.EnqueueSend(packet);
sourceOffset += copySize;
}
Packet replyPacket = DequeueProcessQueue();
if (replyPacket.RequestType == (byte)PacketType.Suspend)
{
EventCapsule terminateCapsule = new FileSaveCapsule(UserToken.UserId, Pid, NetworkEvent.FileSaveFailed,
ErrorType.SocketClosed);
EventQueue.Add(terminateCapsule);
}
if (replyPacket.RequestType == (byte)PacketType.FileSaveDone)
{
EventCapsule capsule =
new FileSaveCapsule(UserToken.UserId, Pid, NetworkEvent.FileSaveDone, ErrorType.Success);
EventQueue.Add(capsule);
}
if (replyPacket.RequestType == (byte)PacketType.Error)
{
EventCapsule capsule = new FileSaveCapsule(UserToken.UserId, Pid, NetworkEvent.FileSaveFailed,
(ErrorType)replyPacket.Data[0]);
EventQueue.Add(capsule);
}
TerminateProcess(this);
}
