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/**
* @file llxfer.h
* @brief definition of LLXfer class for a single xfer
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLXFER_H
#define LL_LLXFER_H
#include "message.h"
#include "lltimer.h"
const S32 LL_XFER_LARGE_PAYLOAD = 7680;
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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