aboutsummaryrefslogtreecommitdiff
path: root/src/fragmentation/test_fragmentation.c
blob: a49f6d71af1c62e42a7fc7064ebc9bf4d5896000 (plain) (blame)
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
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
/*
     This file is part of GNUnet
     Copyright (C) 2004, 2009 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet 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
     Affero General Public License for more details.
    
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
 * @file fragmentation/test_fragmentation.c
 * @brief test for fragmentation.c
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_fragmentation_lib.h"

#define DETAILS GNUNET_NO

/**
 * Number of messages to transmit (note: each uses ~32k memory!)
 */
#define NUM_MSGS 1000

/**
 * MTU to force on fragmentation (must be > 1k + 12)
 */
#define MTU 1111

/**
 * Simulate dropping of 1 out of how many messages? (must be > 1)
 */
#define DROPRATE 15

static int ret = 1;

static unsigned int dups;

static unsigned int fragc;

static unsigned int frag_drops;

static unsigned int acks;

static unsigned int ack_drops;

static struct GNUNET_DEFRAGMENT_Context *defrag;

static struct GNUNET_BANDWIDTH_Tracker trackers[NUM_MSGS];

static struct GNUNET_FRAGMENT_Context *frag;

static struct GNUNET_SCHEDULER_Task * shutdown_task;

static struct GNUNET_TIME_Relative msg_delay;

static struct GNUNET_TIME_Relative ack_delay;


static void
do_shutdown (void *cls)
{
  ret = 0;
  shutdown_task = NULL;
  GNUNET_DEFRAGMENT_context_destroy (defrag);
  defrag = NULL;
  if (NULL != frag)
  {
    GNUNET_FRAGMENT_context_destroy (frag, &msg_delay, &ack_delay);
    frag = NULL;
  }
  fprintf (stderr,
           "\nFinal message-delay: %s\n",
           GNUNET_STRINGS_relative_time_to_string (msg_delay,
                                                   GNUNET_YES));
  fprintf (stderr,
           "Final ack-delay: %s\n",
           GNUNET_STRINGS_relative_time_to_string (ack_delay,
                                                   GNUNET_YES));
}


static void
proc_msgs (void *cls, const struct GNUNET_MessageHeader *hdr)
{
  static unsigned int total;
  unsigned int i;
  const char *buf;

#if DETAILS
  fprintf (stderr, "%s",  "M! ");        /* message complete, good! */
#endif
  buf = (const char *) hdr;
  for (i = sizeof (struct GNUNET_MessageHeader); i < ntohs (hdr->size); i++)
    GNUNET_assert (buf[i] == (char) i);
  total++;
#if ! DETAILS
  if (0 == (total % (NUM_MSGS / 100)))
    fprintf (stderr, "%s",  ".");
#endif
  /* tolerate 10% loss, i.e. due to duplicate fragment IDs */
  if ((total >= NUM_MSGS - (NUM_MSGS / 10)) && (ret != 0))
  {
    if (NULL == shutdown_task)
      shutdown_task = GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
  }
}


/**
 * Process fragment (by passing to defrag).
 */
static void
proc_frac (void *cls, const struct GNUNET_MessageHeader *hdr)
{
  struct GNUNET_FRAGMENT_Context **fc = cls;
  int ret;

  GNUNET_FRAGMENT_context_transmission_done (*fc);
  if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, DROPRATE))
  {
    frag_drops++;
#if DETAILS
    fprintf (stderr, "%s",  "DF ");    /* dropped Frag */
#endif
    return;                     /* random drop */
  }
  if (NULL == defrag)
  {
    fprintf (stderr, "%s",  "?E ");      /* Error: frag after shutdown!? */
    return;
  }
  ret = GNUNET_DEFRAGMENT_process_fragment (defrag, hdr);
  if (ret == GNUNET_NO)
  {
#if DETAILS
    fprintf (stderr, "%s",  "FF ");      /* duplicate fragment */
#endif
    dups++;
  }
  else if (ret == GNUNET_OK)
  {
#if DETAILS
    fprintf (stderr, "%s",  "F! ");      /* good fragment */
#endif
    fragc++;
  }
}


static void
next_transmission ()
{
  static unsigned int i;
  struct GNUNET_MessageHeader *msg;
  static char buf[MTU + 32 * 1024];
  unsigned int j;

  if (0 == i)
  {
    for (j = 0; j < sizeof (buf); j++)
      buf[j] = (char) j;
  }
  else
  {
    GNUNET_FRAGMENT_context_destroy (frag,
                                     &msg_delay,
                                     &ack_delay);
    frag = NULL;
  }
  if (i == NUM_MSGS)
    return;
#if DETAILS
  fprintf (stderr, "%s",  "T! ");        /* sending message */
#endif
  msg = (struct GNUNET_MessageHeader *) buf;
  msg->type = htons ((uint16_t) i);
  msg->size =
    htons (sizeof (struct GNUNET_MessageHeader) + (17 * i) % (32 * 1024));
  frag = GNUNET_FRAGMENT_context_create (NULL /* no stats */ ,
                                         MTU, &trackers[i],
                                         msg_delay,
                                         ack_delay,
                                         msg,
                                         &proc_frac, &frag);
  i++;
}


/**
 * Process ACK (by passing to fragmenter)
 */
static void
proc_acks (void *cls,
           uint32_t msg_id,
           const struct GNUNET_MessageHeader *hdr)
{
  unsigned int i;
  int ret;

  if (0 == GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, DROPRATE))
  {
    ack_drops++;
#if DETAILS
    fprintf (stderr, "%s",  "DA ");    /* dropped ACK */
#endif
    return;                     /* random drop */
  }
  for (i = 0; i < NUM_MSGS; i++)
  {
    if (NULL == frag)
      continue;
    ret = GNUNET_FRAGMENT_process_ack (frag, hdr);
    if (ret == GNUNET_OK)
    {
#if DETAILS
      fprintf (stderr, "%s",  "GA ");    /* good ACK */
#endif
      next_transmission ();
      acks++;
      return;
    }
    if (ret == GNUNET_NO)
    {
#if DETAILS
      fprintf (stderr, "%s",  "AA ");    /* duplciate ACK */
#endif
      acks++;
      return;
    }
  }
#if DETAILS
  fprintf (stderr, "%s",  "?A ");        /* BAD: ack that nobody feels responsible for... */
#endif
}


/**
 * Main function run with scheduler.
 */
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  defrag = GNUNET_DEFRAGMENT_context_create (NULL, MTU,
                                             3,
                                             NULL,
                                             &proc_msgs,
                                             &proc_acks);
  next_transmission ();
}


int
main (int argc, char *argv[])
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };
  char *const argv_prog[] = {
    "test-fragmentation",
    "-c",
    "test_fragmentation_data.conf",
    "-L",
    "WARNING",
    NULL
  };
  unsigned int i;

  msg_delay = GNUNET_TIME_UNIT_MILLISECONDS;
  ack_delay = GNUNET_TIME_UNIT_SECONDS;
  GNUNET_log_setup ("test-fragmentation",
                    "WARNING",
                    NULL);
  for (i = 0; i < NUM_MSGS; i++)
    GNUNET_BANDWIDTH_tracker_init (&trackers[i], NULL, NULL,
                                   GNUNET_BANDWIDTH_value_init ((i + 1) * 1024),
                                   100);
  GNUNET_PROGRAM_run (5,
                      argv_prog,
                      "test-fragmentation", "nohelp",
                      options,
                      &run, NULL);
  fprintf (stderr,
           "\nHad %u good fragments, %u duplicate fragments, %u acks and %u simulated drops of acks\n",
           fragc,
           dups,
           acks,
           ack_drops);
  return ret;
}