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- /*
- This file is part of GNUnet
- (C) 2004, 2009 Christian Grothoff (and other contributing authors)
- GNUnet 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 3, 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
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
- */
- /**
- * @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 500
- /**
- * 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 5
- 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 *frags[NUM_MSGS];
- static GNUNET_SCHEDULER_TaskIdentifier shutdown_task;
- static void
- do_shutdown (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- unsigned int i;
- ret = 0;
- shutdown_task = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_DEFRAGMENT_context_destroy (defrag);
- defrag = NULL;
- for (i = 0; i < NUM_MSGS; i++)
- {
- if (frags[i] == NULL)
- continue;
- GNUNET_FRAGMENT_context_destroy (frags[i], NULL, NULL);
- frags[i] = NULL;
- }
- }
- 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", "!"); /* 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 (GNUNET_SCHEDULER_NO_TASK == shutdown_task)
- shutdown_task = GNUNET_SCHEDULER_add_now (&do_shutdown, NULL);
- }
- }
- /**
- * 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++;
- return; /* random drop */
- }
- for (i = 0; i < NUM_MSGS; i++)
- {
- if (frags[i] == NULL)
- continue;
- ret = GNUNET_FRAGMENT_process_ack (frags[i], hdr);
- if (ret == GNUNET_OK)
- {
- #if DETAILS
- FPRINTF (stderr, "%s", "@"); /* good ACK */
- #endif
- GNUNET_FRAGMENT_context_destroy (frags[i], NULL, NULL);
- frags[i] = NULL;
- acks++;
- return;
- }
- if (ret == GNUNET_NO)
- {
- #if DETAILS
- FPRINTF (stderr, "%s", "@"); /* good ACK */
- #endif
- acks++;
- return;
- }
- }
- #if DETAILS
- FPRINTF (stderr, "%s", "_"); /* BAD: ack that nobody feels responsible for... */
- #endif
- }
- /**
- * 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++;
- 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", "?"); /* duplicate fragment */
- #endif
- dups++;
- }
- else if (ret == GNUNET_OK)
- {
- #if DETAILS
- FPRINTF (stderr, "%s", "."); /* good fragment */
- #endif
- fragc++;
- }
- }
- /**
- * Main function run with scheduler.
- */
- static void
- run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
- {
- unsigned int i;
- struct GNUNET_MessageHeader *msg;
- char buf[MTU + 32 * 1024];
- defrag = GNUNET_DEFRAGMENT_context_create (NULL, MTU, NUM_MSGS /* enough space for all */
- , NULL, &proc_msgs, &proc_acks);
- for (i = 0; i < sizeof (buf); i++)
- buf[i] = (char) i;
- msg = (struct GNUNET_MessageHeader *) buf;
- for (i = 0; i < NUM_MSGS; i++)
- {
- msg->type = htons ((uint16_t) i);
- msg->size =
- htons (sizeof (struct GNUNET_MessageHeader) + (17 * i) % (32 * 1024));
- frags[i] = GNUNET_FRAGMENT_context_create (NULL /* no stats */ ,
- MTU, &trackers[i],
- GNUNET_TIME_UNIT_MILLISECONDS,
- GNUNET_TIME_UNIT_SECONDS,
- msg,
- &proc_frac, &frags[i]);
- }
- }
- 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;
- 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;
- }
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