107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/**
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* @file llpacketring.h
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* @brief definition of LLPacketRing class for implementing a resend,
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* drop, or delay in packet transmissions
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLPACKETRING_H
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#define LL_LLPACKETRING_H
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#include <queue>
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#include "llhost.h"
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#include "llpacketbuffer.h"
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#include "llthrottle.h"
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#include "net.h"
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class LLPacketRing
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{
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public:
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LLPacketRing();
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~LLPacketRing();
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void cleanup();
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void dropPackets(U32);
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void setDropPercentage (F32 percent_to_drop);
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void setUseInThrottle(const BOOL use_throttle);
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void setUseOutThrottle(const BOOL use_throttle);
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void setInBandwidth(const F32 bps);
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void setOutBandwidth(const F32 bps);
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S32 receivePacket (S32 socket, char *datap);
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S32 receiveFromRing (S32 socket, char *datap);
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BOOL sendPacket(int h_socket, char * send_buffer, S32 buf_size, LLHost host);
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inline LLHost getLastSender();
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inline LLHost getLastReceivingInterface();
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S32 getAndResetActualInBits() { S32 bits = mActualBitsIn; mActualBitsIn = 0; return bits;}
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S32 getAndResetActualOutBits() { S32 bits = mActualBitsOut; mActualBitsOut = 0; return bits;}
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protected:
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BOOL mUseInThrottle;
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BOOL mUseOutThrottle;
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// For simulating a lower-bandwidth connection - BPS
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LLThrottle mInThrottle;
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LLThrottle mOutThrottle;
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S32 mActualBitsIn;
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S32 mActualBitsOut;
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S32 mMaxBufferLength; // How much data can we queue up before dropping data.
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S32 mInBufferLength; // Current incoming buffer length
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S32 mOutBufferLength; // Current outgoing buffer length
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F32 mDropPercentage; // % of packets to drop
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U32 mPacketsToDrop; // drop next n packets
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std::queue<LLPacketBuffer *> mReceiveQueue;
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std::queue<LLPacketBuffer *> mSendQueue;
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LLHost mLastSender;
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LLHost mLastReceivingIF;
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private:
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BOOL sendPacketImpl(int h_socket, const char * send_buffer, S32 buf_size, LLHost host);
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};
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inline LLHost LLPacketRing::getLastSender()
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{
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return mLastSender;
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}
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inline LLHost LLPacketRing::getLastReceivingInterface()
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{
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return mLastReceivingIF;
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}
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#endif
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