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
|
/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) 1997 The Regents of the University of California.
* 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 the Network Research
* Group at Lawrence Berkeley National Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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.
*/
#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvsroot/nsnam/ns-2/classifier/classifier-hash.cc,v 1.31 2010/03/08 05:54:49 tom_henderson Exp $ (LBL)";
#endif
//
// a generalized classifier for mapping (src/dest/flowid) fields
// to a bucket. "buckets_" worth of hash table entries are created
// at init time, and other entries in the same bucket are created when
// needed
//
//
extern "C" {
#include <tcl.h>
}
#include <stdlib.h>
#include "config.h"
#include "packet.h"
#include "ip.h"
#include "classifier.h"
#include "classifier-hash.h"
/****************** HashClassifier Methods ************/
int HashClassifier::classify(Packet * p) {
int slot= lookup(p);
if (slot >= 0 && slot <=maxslot_)
return (slot);
else if (default_ >= 0)
return (default_);
return (unknown(p));
} // HashClassifier::classify
int HashClassifier::command(int argc, const char*const* argv)
{
Tcl& tcl = Tcl::instance();
/*
* $classifier set-hash $hashbucket src dst fid $slot
*/
if (argc == 7) {
if (strcmp(argv[1], "set-hash") == 0) {
//xxx: argv[2] is ignored for now
nsaddr_t src = atoi(argv[3]);
nsaddr_t dst = atoi(argv[4]);
int fid = atoi(argv[5]);
int slot = atoi(argv[6]);
if (0 > set_hash(src, dst, fid, slot))
return TCL_ERROR;
return TCL_OK;
}
} else if (argc == 6) {
/* $classifier lookup $hashbuck $src $dst $fid */
if (strcmp(argv[1], "lookup") == 0) {
nsaddr_t src = atoi(argv[3]);
nsaddr_t dst = atoi(argv[4]);
int fid = atoi(argv[5]);
int slot= get_hash(src, dst, fid);
if (slot>=0 && slot <=maxslot_) {
tcl.resultf("%s", slot_[slot]->name());
return (TCL_OK);
}
tcl.resultf("");
return (TCL_OK);
}
// Added by Yun Wang to set rate for TBFlow or TSWFlow
if (strcmp(argv[1], "set-flowrate") == 0) {
int fid = atoi(argv[2]);
nsaddr_t src = 0; // only use fid
nsaddr_t dst = 0; // to classify flows
int slot = get_hash( src, dst, fid );
if ( slot >= 0 && slot <= maxslot_ ) {
Flow* f = (Flow*)slot_[slot];
tcl.evalf("%u set target_rate_ %s",
f, argv[3]);
tcl.evalf("%u set bucket_depth_ %s",
f, argv[4]);
tcl.evalf("%u set tbucket_ %s",
f, argv[5]);
return (TCL_OK);
}
else {
tcl.evalf("%s set-rate %u %u %u %u %s %s %s",
name(), src, dst, fid, slot, argv[3], argv[4],argv[5])
;
return (TCL_OK);
}
}
} else if (argc == 5) {
/* $classifier del-hash src dst fid */
if (strcmp(argv[1], "del-hash") == 0) {
nsaddr_t src = atoi(argv[2]);
nsaddr_t dst = atoi(argv[3]);
int fid = atoi(argv[4]);
Tcl_HashEntry *ep= Tcl_FindHashEntry(&ht_,
hashkey(src, dst,
fid));
if (ep) {
long slot = (long)Tcl_GetHashValue(ep);
Tcl_DeleteHashEntry(ep);
tcl.resultf("%lu", slot);
return (TCL_OK);
}
return (TCL_ERROR);
}
}
return (Classifier::command(argc, argv));
}
/************** TCL linkage ****************/
static class SrcDestHashClassifierClass : public TclClass {
public:
SrcDestHashClassifierClass() : TclClass("Classifier/Hash/SrcDest") {}
TclObject* create(int, const char*const*) {
return new SrcDestHashClassifier;
}
} class_hash_srcdest_classifier;
static class FidHashClassifierClass : public TclClass {
public:
FidHashClassifierClass() : TclClass("Classifier/Hash/Fid") {}
TclObject* create(int, const char*const*) {
return new FidHashClassifier;
}
} class_hash_fid_classifier;
static class DestHashClassifierClass : public TclClass {
public:
DestHashClassifierClass() : TclClass("Classifier/Hash/Dest") {}
TclObject* create(int, const char*const*) {
return new DestHashClassifier;
}
} class_hash_dest_classifier;
static class SrcDestFidHashClassifierClass : public TclClass {
public:
SrcDestFidHashClassifierClass() : TclClass("Classifier/Hash/SrcDestFid") {}
TclObject* create(int, const char*const*) {
return new SrcDestFidHashClassifier;
}
} class_hash_srcdestfid_classifier;
// DestHashClassifier methods
int DestHashClassifier::classify(Packet *p)
{
int slot= lookup(p);
if (slot >= 0 && slot <=maxslot_)
return (slot);
else if (default_ >= 0)
return (default_);
return -1;
} // HashClassifier::classify
void DestHashClassifier::do_install(char* dst, NsObject *target) {
nsaddr_t d = atoi(dst);
int slot = getnxt(target);
install(slot, target);
if (set_hash(0, d, 0, slot) < 0)
fprintf(stderr, "DestHashClassifier::set_hash from within DestHashClassifier::do_install returned value < 0");
}
int DestHashClassifier::command(int argc, const char*const* argv)
{
if (argc == 4) {
// $classifier install $dst $node
if (strcmp(argv[1], "install") == 0) {
char dst[SMALL_LEN];
strcpy(dst, argv[2]);
NsObject *node = (NsObject*)TclObject::lookup(argv[3]);
//nsaddr_t dst = atoi(argv[2]);
do_install(dst, node);
return TCL_OK;
//int slot = getnxt(node);
//install(slot, node);
//if (set_hash(0, dst, 0, slot) >= 0)
//return TCL_OK;
//else
//return TCL_ERROR;
} // if
}
return(HashClassifier::command(argc, argv));
} // command
void HashClassifier::set_table_size(int)
{}
|
