1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/**
* @file llpacketring.h
* @brief definition of LLPacketRing class for implementing a resend,
* drop, or delay in packet transmissions
*
* $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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_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();
inline LLHost getLastReceivingInterface();
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;
LLHost mLastReceivingIF;
BOOL doSendPacket(int h_socket, const char * send_buffer, S32 buf_size, LLHost host);
U8 mProxyWrappedSendBuffer[NET_BUFFER_SIZE];
};
inline LLHost LLPacketRing::getLastSender()
{
return mLastSender;
}
inline LLHost LLPacketRing::getLastReceivingInterface()
{
return mLastReceivingIF;
}
#endif
|
