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
|
/*
* Copyright (c) 2000 Nortel Networks
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Nortel Networks.
* 4. The name of the Nortel Networks may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY NORTEL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NORTEL OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Developed by: Farhan Shallwani, Jeremy Ethridge
* Peter Pieda, and Mandeep Baines
* Maintainer: Peter Pieda <ppieda@nortelnetworks.com>
*/
#ifndef dsredq_h
#define dsredq_h
//#include "dsred.h"
// maximum number of virtual RED queues in one physical queue
#define MAX_PREC 3
enum mredModeType {rio_c, rio_d, wred, dropTail};
// struct qParam
// This structure specifies the parameters needed to be maintained for
// each RED queue.
struct qParam {
edp edp_; // early drop parameters (see red.h)
edv edv_; // early drop variables (see red.h)
int qlen; // actual (not weighted) queue length in packets
double idletime_; // needed to calculate avg queue
bool idle_; // needed to calculate avg queue
};
// class redQueue
// This class provides specs for one physical queue.
class redQueue {
public:
int numPrec; // the current number of precedence levels (or virtual queues)
int qlim;
mredModeType mredMode;
redQueue();
// configures one virtual RED queue
void config(int prec, int argc, const char*const* argv);
void initREDStateVar(void); // initializes RED state variables
// Updates a virtual queue's length after dequeueing
void updateVREDLen(int);
//sets idle_ flag to 0
// Patch contributed by Thilo Wagner <wagner@panasonic.de>
void updateIdleFlag(int);
// updates RED variables after enqueueing/dequing a packet
void updateREDStateVar(int prec);
// enques packets into a physical queue
int enque(Packet *pkt, int prec, int ecn);
Packet* deque(void); // deques packets
double getWeightedLength();
int getRealLength(void); // queries length of a physical queue
// sets packet time constant values
//(needed for calc. avgQSize) for each virtual queue
// queries average length of a virtual queue
double getWeightedLength_v(int prec);
// queries length of a virtual queue
int getRealLength_v(int prec);
void setPTC(double outLinkBW);
// sets mean packet size (needed to calculate avg. queue size)
void setMPS(int mps);
private:
// underlying FIFO queue
PacketQueue *q_;
// used to maintain parameters for each of the virtual queues
qParam qParam_[MAX_PREC];
// to calculate avg. queue size of a virtual queue
void calcAvg(int prec, int m);
};
#endif
|
