blob: 6d0506437140a789d978175c29fee1e247fab4ff (
plain)
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
/*
rateclass.cpp - Rate Limiting Implementation
Copyright (c) 2004 by Tom Linsky <[email protected]>
Copyright (c) 2004 by Matt Rogers <[email protected]>
Kopete (c) 2002-2003 by the Kopete developers <[email protected]>
*************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
*************************************************************************
*/
#include "rateclass.h"
#include <tqtimer.h>
#include <kdebug.h>
#include "transfer.h"
using namespace Oscar;
RateClass::RateClass( TQObject* tqparent )
: TQObject( tqparent, 0 )
{
m_waitingToSend = false;
m_packetTimer.start();
}
RateClass::~ RateClass()
{
dumpQueue();
m_members.clear();
}
WORD RateClass::id() const
{
return m_rateInfo.classId;
}
void RateClass::setRateInfo( RateInfo newRateInfo )
{
m_rateInfo.classId = newRateInfo.classId;
m_rateInfo.windowSize = newRateInfo.windowSize;
m_rateInfo.clearLevel = newRateInfo.clearLevel;
m_rateInfo.alertLevel = newRateInfo.alertLevel;
m_rateInfo.limitLevel = newRateInfo.limitLevel;
m_rateInfo.disconnectLevel = newRateInfo.disconnectLevel;
m_rateInfo.currentLevel = newRateInfo.currentLevel;
m_rateInfo.initialLevel = newRateInfo.initialLevel;
m_rateInfo.maxLevel = newRateInfo.maxLevel;
m_rateInfo.lastTime = newRateInfo.lastTime;
m_rateInfo.currentState = newRateInfo.currentState;
}
void RateClass::addMember( const SNAC& s )
{
addMember( s.family, s.subtype );
}
void RateClass::addMember( WORD family, WORD subtype )
{
SnacPair snacPair;
snacPair.family = family;
snacPair.subtype = subtype;
m_members.append( snacPair );
}
bool RateClass::isMember(const SNAC &s) const
{
TQValueList<SnacPair>::const_iterator it;
TQValueList<SnacPair>::const_iterator spEnd = m_members.constEnd();
for ( it = m_members.constBegin(); it != spEnd; ++it )
{
if ( ( *it ).family == s.family && ( *it ).subtype == s.subtype )
return true;
}
return false;
}
bool RateClass::isMember( WORD family, WORD subtype ) const
{
TQValueList<SnacPair>::const_iterator it;
TQValueList<SnacPair>::const_iterator spEnd = m_members.constEnd();
for ( it = m_members.constBegin(); it != spEnd; ++it )
{
if ( ( *it ).family == family && ( *it ).subtype == subtype )
{
return true;
}
}
return false;
}
void RateClass::enqueue( Transfer* t )
{
m_packetQueue.push_back( t );
/*kdDebug(OSCAR_RAW_DEBUG) << k_funcinfo << "Send queue length is now: "
<< m_packetQueue.count() << endl;*/
setupTimer();
}
void RateClass::dequeue()
{
m_packetQueue.pop_front();
}
bool RateClass::queueIsEmpty() const
{
return m_packetQueue.isEmpty();
}
int RateClass::timeToInitialLevel()
{
DWORD newLevel = 0;
//get time elapsed since the last packet was sent
int timeDiff = m_packetTimer.elapsed();
newLevel = calcNewLevel( timeDiff );
if ( newLevel < m_rateInfo.initialLevel )
{
int waitTime = ( m_rateInfo.initialLevel * m_rateInfo.windowSize ) - ( ( m_rateInfo.windowSize - 1 ) * m_rateInfo.currentLevel );
return waitTime;
}
return 0;
}
int RateClass::timeToNextSend()
{
DWORD newLevel = 0;
//get time elapsed since the last packet was sent
int timeDiff = m_packetTimer.elapsed();
DWORD windowSize = m_rateInfo.windowSize;
newLevel = calcNewLevel( timeDiff );
//The maximum level at which we can safely send a packet
DWORD maxPacket = m_rateInfo.alertLevel + RATE_SAFETY_TIME;
/*kdDebug(OSCAR_RAW_DEBUG) << k_funcinfo << "Rate Information:"
<< "\nWindow Size: " << windowSize
<< "\nWindow Size - 1: " << windowSize - 1
<< "\nOld Level: " << m_rateInfo.currentLevel
<< "\nAlert Level: " << m_rateInfo.alertLevel
<< "\nLimit Level: " << m_rateInfo.limitLevel
<< "\nDisconnect Level: " << m_rateInfo.disconnectLevel
<< "\nNew Level: " << newLevel
<< "\nTime elapsed: " << timeDiff
<< "\nMax level to send: " << maxPacket << endl; */
//If we are one packet or less away from being blocked, wait to send
if ( newLevel < maxPacket || newLevel < m_rateInfo.disconnectLevel )
{
int waitTime = ( windowSize * maxPacket ) - ( ( windowSize - 1 ) * m_rateInfo.currentLevel );
kdDebug(OSCAR_RAW_DEBUG) << "We're sending too fast. Will wait " << waitTime << "ms before sending" << endl;
return waitTime;
}
return 0;
}
DWORD RateClass::calcNewLevel( int timeDifference ) const
{
//kdDebug(OSCAR_RAW_DEBUG) << k_funcinfo << "Time since last packet: "
// << timeDifference << endl;
//Calculate new rate level
//NewLevel = ( ( Window - 1 ) * OldLevel + TimeDiff )/Window
//add 1 because we never want to round down or there will be problems
uint newLevel = ( ( ( m_rateInfo.windowSize - 1 ) * m_rateInfo.currentLevel ) + timeDifference ) / m_rateInfo.windowSize;
if ( newLevel > m_rateInfo.initialLevel )
newLevel = m_rateInfo.initialLevel;
return newLevel;
}
void RateClass::setupTimer()
{
if ( !m_waitingToSend )
{
m_waitingToSend = true;
int ttns = timeToNextSend();
if ( ttns <= 0 )
{
slotSend(); //send now
}
else
{
TQTimer::singleShot( ttns, this, TQT_SLOT( slotSend() ) ); //or send later
}
}
}
void RateClass::slotSend()
{
//kdDebug(OSCAR_RAW_DEBUG) << k_funcinfo << endl;
if ( m_packetQueue.isEmpty() )
return;
//send then pop off the list
emit dataReady( m_packetQueue.first() );
dequeue();
updateRateInfo();
m_waitingToSend = false;
// check if we still have packets to send
if ( !m_packetQueue.isEmpty() )
setupTimer();
}
void RateClass::updateRateInfo()
{
//Update rate info
DWORD newLevel = calcNewLevel( m_packetTimer.elapsed() );
m_rateInfo.currentLevel = newLevel;
//kdDebug(OSCAR_RAW_DEBUG) << k_funcinfo << "Current Level = " << newLevel << endl;
//restart the timer
m_packetTimer.restart();
}
void RateClass::dumpQueue()
{
TQValueList<Transfer*>::iterator it = m_packetQueue.begin();
while ( it != m_packetQueue.end() && m_packetQueue.count() > 0 )
{
Transfer* t = ( *it );
it = m_packetQueue.remove( it );
delete t;
}
}
#include "rateclass.moc"
//kate: tab-width 4; indent-mode csands;
|
