179 lines
5.5 KiB
C++
179 lines
5.5 KiB
C++
/* Copyright (C) 2016 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "NetFileTransfer.h"
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#include "lib/timer.h"
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#include "network/NetMessage.h"
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#include "network/NetSession.h"
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#include "ps/CLogger.h"
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Status CNetFileTransferer::HandleMessageReceive(const CNetMessage* message)
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{
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if (message->GetType() == NMT_FILE_TRANSFER_RESPONSE)
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{
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CFileTransferResponseMessage* respMessage = (CFileTransferResponseMessage*)message;
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if (m_FileReceiveTasks.find(respMessage->m_RequestID) == m_FileReceiveTasks.end())
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{
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LOGERROR("Net transfer: Unsolicited file transfer response (id=%d)", (int)respMessage->m_RequestID);
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return ERR::FAIL;
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}
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if (respMessage->m_Length == 0 || respMessage->m_Length > MAX_FILE_TRANSFER_SIZE)
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{
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LOGERROR("Net transfer: Invalid size for file transfer response (length=%d)", (int)respMessage->m_Length);
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return ERR::FAIL;
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}
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shared_ptr<CNetFileReceiveTask> task = m_FileReceiveTasks[respMessage->m_RequestID];
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task->m_Length = respMessage->m_Length;
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task->m_Buffer.reserve(respMessage->m_Length);
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LOGMESSAGERENDER("Downloading data over network (%d KB) - please wait...", (int)(task->m_Length/1024));
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m_LastProgressReportTime = timer_Time();
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return INFO::OK;
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}
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else if (message->GetType() == NMT_FILE_TRANSFER_DATA)
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{
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CFileTransferDataMessage* dataMessage = (CFileTransferDataMessage*)message;
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if (m_FileReceiveTasks.find(dataMessage->m_RequestID) == m_FileReceiveTasks.end())
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{
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LOGERROR("Net transfer: Unsolicited file transfer data (id=%d)", (int)dataMessage->m_RequestID);
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return ERR::FAIL;
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}
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shared_ptr<CNetFileReceiveTask> task = m_FileReceiveTasks[dataMessage->m_RequestID];
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task->m_Buffer += dataMessage->m_Data;
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if (task->m_Buffer.size() > task->m_Length)
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{
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LOGERROR("Net transfer: Invalid size for file transfer data (length=%d actual=%d)", (int)task->m_Length, (int)task->m_Buffer.size());
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return ERR::FAIL;
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}
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CFileTransferAckMessage ackMessage;
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ackMessage.m_RequestID = task->m_RequestID;
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ackMessage.m_NumPackets = 1; // TODO: would be nice to send a single ack for multiple packets at once
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m_Session->SendMessage(&ackMessage);
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if (task->m_Buffer.size() == task->m_Length)
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{
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LOGMESSAGERENDER("Download completed");
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task->OnComplete();
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m_FileReceiveTasks.erase(dataMessage->m_RequestID);
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return INFO::OK;
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}
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// TODO: should report progress using proper GUI
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// Report the download status occassionally
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double t = timer_Time();
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if (t > m_LastProgressReportTime + 0.5)
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{
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LOGMESSAGERENDER("Downloading data: %.1f%% of %d KB", 100.f*task->m_Buffer.size()/task->m_Length, (int)(task->m_Length/1024));
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m_LastProgressReportTime = t;
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}
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return INFO::OK;
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}
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else if (message->GetType() == NMT_FILE_TRANSFER_ACK)
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{
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CFileTransferAckMessage* ackMessage = (CFileTransferAckMessage*)message;
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if (m_FileSendTasks.find(ackMessage->m_RequestID) == m_FileSendTasks.end())
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{
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LOGERROR("Net transfer: Unsolicited file transfer ack (id=%d)", (int)ackMessage->m_RequestID);
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return ERR::FAIL;
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}
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CNetFileSendTask& task = m_FileSendTasks[ackMessage->m_RequestID];
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if (ackMessage->m_NumPackets > task.packetsInFlight)
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{
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LOGERROR("Net transfer: Invalid num packets for file transfer ack (num=%d inflight=%d)",
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(int)ackMessage->m_NumPackets, (int)task.packetsInFlight);
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return ERR::FAIL;
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}
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task.packetsInFlight -= ackMessage->m_NumPackets;
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return INFO::OK;
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}
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return INFO::SKIPPED;
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}
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void CNetFileTransferer::StartTask(const shared_ptr<CNetFileReceiveTask>& task)
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{
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u32 requestID = m_NextRequestID++;
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task->m_RequestID = requestID;
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m_FileReceiveTasks[requestID] = task;
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CFileTransferRequestMessage request;
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request.m_RequestID = requestID;
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m_Session->SendMessage(&request);
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}
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void CNetFileTransferer::StartResponse(u32 requestID, const std::string& data)
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{
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CNetFileSendTask task;
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task.requestID = requestID;
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task.buffer = data;
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task.offset = 0;
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task.packetsInFlight = 0;
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task.maxWindowSize = DEFAULT_FILE_TRANSFER_WINDOW_SIZE;
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m_FileSendTasks[task.requestID] = task;
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CFileTransferResponseMessage respMessage;
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respMessage.m_RequestID = requestID;
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respMessage.m_Length = task.buffer.size();
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m_Session->SendMessage(&respMessage);
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}
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void CNetFileTransferer::Poll()
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{
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// Find tasks which have fewer packets in flight than their window size,
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// and send more packets
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for (std::pair<const u32, CNetFileSendTask>& p : m_FileSendTasks)
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{
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CNetFileSendTask& task = p.second;
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while (task.packetsInFlight < task.maxWindowSize && task.offset < task.buffer.size())
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{
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CFileTransferDataMessage dataMessage;
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dataMessage.m_RequestID = task.requestID;
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ssize_t packetSize = std::min(DEFAULT_FILE_TRANSFER_PACKET_SIZE, task.buffer.size() - task.offset);
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dataMessage.m_Data = task.buffer.substr(task.offset, packetSize);
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task.offset += packetSize;
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++task.packetsInFlight;
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m_Session->SendMessage(&dataMessage);
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}
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}
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// TODO: need to garbage-collect finished tasks
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}
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