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/**
* @file llpacketring.h
* @brief definition of LLPacketRing class for implementing a resend,
* drop, or delay in packet transmissions
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, 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_LLPACKETRING_H
#define LL_LLPACKETRING_H
#include <queue>
#include "llpacketbuffer.h"
#include "llhost.h"
#include "net.h"
#include "llthrottle.h"
class LLPacketRing
{
public:
LLPacketRing();
~LLPacketRing();
void cleanup();
void dropPackets(U32);
void setDropPercentage (F32 percent_to_drop);
void setUseInThrottle(const BOOL use_throttle);
void setUseOutThrottle(const BOOL use_throttle);
void setInBandwidth(const F32 bps);
void setOutBandwidth(const F32 bps);
S32 receivePacket (S32 socket, char *datap);
S32 receiveFromRing (S32 socket, char *datap);
BOOL sendPacket(int h_socket, char * send_buffer, S32 buf_size, LLHost host);
inline LLHost getLastSender();
S32 getAndResetActualInBits() { S32 bits = mActualBitsIn; mActualBitsIn = 0; return bits;}
S32 getAndResetActualOutBits() { S32 bits = mActualBitsOut; mActualBitsOut = 0; return bits;}
protected:
BOOL mUseInThrottle;
BOOL mUseOutThrottle;
// For simulating a lower-bandwidth connection - BPS
LLThrottle mInThrottle;
LLThrottle mOutThrottle;
S32 mActualBitsIn;
S32 mActualBitsOut;
S32 mMaxBufferLength; // How much data can we queue up before dropping data.
S32 mInBufferLength; // Current incoming buffer length
S32 mOutBufferLength; // Current outgoing buffer length
F32 mDropPercentage; // % of packets to drop
U32 mPacketsToDrop; // drop next n packets
std::queue<LLPacketBuffer *> mReceiveQueue;
std::queue<LLPacketBuffer *> mSendQueue;
LLHost mLastSender;
};
inline LLHost LLPacketRing::getLastSender()
{
return mLastSender;
}
#endif
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