102 lines
2.9 KiB
C++
102 lines
2.9 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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* $LicenseInfo:firstyear=2001&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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 "llproxy.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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