// Check if a packet already exists in the incomingPackets log
public static bool checkPacketLog(FilePacket packet)
{
foreach (FilePacket ipacket in incomingPacketsLog)
{
if (ipacket.transfer_uid.Equals(packet.transfer_uid) && ipacket.packet_number == packet.packet_number && ipacket.added)
{
return(true);
}
}
return(false);
}
public static bool receiveFileData(byte[] data, byte[] sender)
{
Logging.info("Received File Data");
byte[] file_data = null;
try
{
using (MemoryStream m = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(m))
{
string uid = reader.ReadString();
ulong packet_number = reader.ReadUInt64();
FilePacket packet = new FilePacket(uid, packet_number);
if (checkPacketLog(packet))
{
return(false);
}
int data_length = reader.ReadInt32();
if (data_length > 0)
{
file_data = reader.ReadBytes(data_length);
}
Logging.info("File Uid: {0} Packet #{1}", uid, packet_number);
FileTransfer transfer = TransferManager.getIncomingTransfer(uid);
if (transfer == null)
{
return(false);
}
// Check if the transfer is already completed
if (transfer.completed)
{
return(false);
}
// Check if this is the next packet to process
if (transfer.lastPacket != packet_number)
{
return(false);
}
incomingPacketsLog.Add(packet);
transfer.fileStream.Seek(Config.packetDataSize * (int)packet_number, SeekOrigin.Begin);
transfer.fileStream.Write(file_data, 0, file_data.Length);
transfer.updateActivity(packet_number + 1);
ulong new_packet_number = packet_number + 1;
if (new_packet_number * (ulong)Config.packetDataSize > transfer.fileSize + (ulong)Config.packetDataSize)
{
completeFileTransfer(sender, uid);
sendFileTransferCompleted(sender, uid);
return(true);
}
requestFileData(sender, uid, new_packet_number);
}
}
}
catch (Exception e)
{
Logging.error("Exception occured while receiving file data from bytes: " + e);
}
return(true);
}