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/**
* @file llxfer.h
* @brief definition of LLXfer class for a single xfer
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLXFER_H
#define LL_LLXFER_H
#include "message.h"
#include "lltimer.h"
#include "llextendedstatus.h"
const S32 LL_XFER_LARGE_PAYLOAD = 7680;
const S32 LL_ERR_FILE_EMPTY = -44;
const int LL_ERR_FILE_NOT_FOUND = -43;
const int LL_ERR_CANNOT_OPEN_FILE = -42;
const int LL_ERR_EOF = -39;
typedef enum ELLXferStatus {
e_LL_XFER_UNINITIALIZED,
e_LL_XFER_REGISTERED, // a buffer which has been registered as available for a request
e_LL_XFER_PENDING, // a transfer which has been requested but is waiting for a free slot
e_LL_XFER_IN_PROGRESS,
e_LL_XFER_COMPLETE,
e_LL_XFER_ABORTED,
e_LL_XFER_NONE
} ELLXferStatus;
class LLXfer
{
private:
protected:
S32 mChunkSize;
public:
LLXfer *mNext;
U64 mID;
S32 mPacketNum;
LLHost mRemoteHost;
S32 mXferSize;
char *mBuffer;
U32 mBufferLength;
U32 mBufferStartOffset;
BOOL mBufferContainsEOF;
ELLXferStatus mStatus;
BOOL mWaitingForACK;
void (*mCallback)(void **,S32,LLExtStat);
void **mCallbackDataHandle;
S32 mCallbackResult;
LLTimer ACKTimer;
S32 mRetries;
static const U32 XFER_FILE;
static const U32 XFER_VFILE;
static const U32 XFER_MEM;
private:
protected:
public:
LLXfer (S32 chunk_size);
virtual ~LLXfer();
void init(S32 chunk_size);
virtual void cleanup();
virtual S32 startSend (U64 xfer_id, const LLHost &remote_host);
virtual void sendPacket(S32 packet_num);
virtual void sendNextPacket();
virtual void resendLastPacket();
virtual S32 processEOF();
virtual S32 startDownload();
virtual S32 receiveData (char *datap, S32 data_size);
virtual void abort(S32);
virtual S32 suck(S32 start_position);
virtual S32 flush();
virtual S32 encodePacketNum(S32 packet_num, BOOL is_eof);
virtual void setXferSize (S32 data_size);
virtual S32 getMaxBufferSize();
virtual std::string getFileName();
virtual U32 getXferTypeTag();
friend std::ostream& operator<< (std::ostream& os, LLXfer &hh);
};
#endif
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