C:/knet/include/kNet/FragmentedTransferManager.h

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/* Copyright 2010 Jukka Jylänki

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License. */
#pragma once

#include <map>
#include <vector>
#include <list>

namespace kNet
{

class NetworkMessage;

class FragmentedSendManager
{
public:
   struct FragmentedTransfer
   {
      int id;

      size_t totalNumFragments;

      std::list<NetworkMessage*> fragments;

      void AddMessage(NetworkMessage *message);
   };

   typedef std::list<FragmentedTransfer> TransferList;
   TransferList transfers;

   FragmentedTransfer *AllocateNewFragmentedTransfer();
   void RemoveMessage(FragmentedTransfer *transfer, NetworkMessage *message);

   bool AllocateFragmentedTransferID(FragmentedTransfer &transfer);

   void FreeAllTransfers();

private:
   void FreeFragmentedTransfer(FragmentedTransfer *transfer);
};

class FragmentedReceiveManager
{
public:
   struct ReceiveFragment
   {
      int fragmentIndex;

      std::vector<char> data;
   };

   struct ReceiveTransfer
   {
      int transferID;

      int numTotalFragments;

      std::vector<ReceiveFragment> fragments;
   };

   std::vector<ReceiveTransfer> transfers;

   void NewFragmentStartReceived(int transferID, int numTotalFragments, const char *data, size_t numBytes);
   bool NewFragmentReceived(int transferID, int fragmentNumber, const char *data, size_t numBytes);
   void AssembleMessage(int transferID, std::vector<char> &assembledData);
   void FreeMessage(int transferID);
};

} // ~kNet