summaryrefslogtreecommitdiff
path: root/src/transport/gnunet-service-transport_manipulation.c
blob: da3fc2de94ef313e2bf1b92e08078af2629962ba (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
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
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
/*
     This file is part of GNUnet.
     (C) 2010-2013 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 transport/gnunet-service-transport_manipulation.c
 * @brief transport component manipulation traffic for simulation
 * @author Christian Grothoff
 * @author Matthias Wachs
 */
#include "platform.h"
#include "gnunet-service-transport_blacklist.h"
#include "gnunet-service-transport_clients.h"
#include "gnunet-service-transport_hello.h"
#include "gnunet-service-transport_neighbours.h"
#include "gnunet-service-transport_plugins.h"
#include "gnunet-service-transport_validation.h"
#include "gnunet-service-transport.h"
#include "transport.h"

enum TRAFFIC_METRIC_DIRECTION
{
	TM_SEND = 0,
	TM_RECEIVE = 1,
	TM_BOTH = 2
};


/**
 * Struct containing information about manipulations to a specific peer
 */
struct TM_Peer;

/**
 * Manipulation entry
 */
struct PropManipulationEntry
{
	/**
	 * Next in DLL
	 */
	struct PropManipulationEntry *next;

	/**
	 * Previous in DLL
	 */
	struct PropManipulationEntry *prev;

	/**
	 * ATS type in HBO
	 */
	uint32_t type;

	/**
	 * Value in HBO
	 */
	uint32_t metrics[TM_BOTH];

};

/**
 * Struct containing information about manipulations to a specific peer
 */
struct TM_Peer
{
	/**
	 * Peer ID
	 */
	struct GNUNET_PeerIdentity peer;

	struct PropManipulationEntry *head;
	struct PropManipulationEntry *tail;

	/**
	 * Peer specific manipulation metrics
	 */
	uint32_t metrics [TM_BOTH][GNUNET_ATS_QualityPropertiesCount];

	/**
	 * Task to schedule delayed sendding
	 */
	GNUNET_SCHEDULER_TaskIdentifier send_delay_task;

	/**
	 * Send queue DLL head
	 */
	struct DelayQueueEntry *send_head;

	/**
	 * Send queue DLL tail
	 */
	struct DelayQueueEntry *send_tail;
};


struct GST_ManipulationHandle
{
	/**
	 * Hashmap contain all peers currently manipulated
	 */
	struct GNUNET_CONTAINER_MultiPeerMap *peers;

	/**
	 * Peer containing information for general manipulation
	 */
	struct TM_Peer general;
};



/**
 * Entry in the delay queue for an outbound delayed message
 */
struct DelayQueueEntry
{
	/**
	 * Next in DLL
	 */
	struct DelayQueueEntry *prev;

	/**
	 * Previous in DLL
	 */
	struct DelayQueueEntry *next;

	/**
	 * Peer this entry is belonging to
	 * if (NULL == tmp): enqueued in generic DLL and scheduled by generic_send_delay_task
	 * else: enqueued in tmp->send_head and tmp->send_tail and scheduled by tmp->send_delay_task
	 */
	struct TM_Peer *tmp;

	/**
	 * Peer ID
	 */
	struct GNUNET_PeerIdentity id;

	/**
	 * Absolute time when to send
	 */
	struct GNUNET_TIME_Absolute sent_at;

	/**
	 * The message
	 */
	void *msg;

	/**
	 * The message size
	 */
	size_t msg_size;

	/**
	 * Message timeout
	 */
	struct GNUNET_TIME_Relative timeout;

	/**
	 * Transports send continuation
	 */
	GST_NeighbourSendContinuation cont;

	/**
	 * Transports send continuation cls
	 */
	void *cont_cls;
};

struct GST_ManipulationHandle man_handle;

/**
 * DLL head for delayed messages based on general delay
 */
struct DelayQueueEntry *generic_dqe_head;

/**
 * DLL tail for delayed messages based on general delay
 */
struct DelayQueueEntry *generic_dqe_tail;

/**
 * Task to schedule delayed sending based on general delay
 */
GNUNET_SCHEDULER_TaskIdentifier generic_send_delay_task;

static void
set_metric (struct TM_Peer *dest, int direction, uint32_t type, uint32_t value)
{
	struct PropManipulationEntry *cur;
	for (cur = dest->head; NULL != cur; cur = cur->next)
	{
		if (cur->type == type)
			break;
	}
	if (NULL == cur)
	{
		cur = GNUNET_new (struct PropManipulationEntry);
		GNUNET_CONTAINER_DLL_insert (dest->head, dest->tail, cur);
		cur->type = type;
		cur->metrics[TM_SEND] = UINT32_MAX;
		cur->metrics[TM_RECEIVE] = UINT32_MAX;
	}


	switch (direction) {
		case TM_BOTH:
			cur->metrics[TM_SEND] = value;
			cur->metrics[TM_RECEIVE] = value;
			break;
		case TM_SEND:
			cur->metrics[TM_SEND] = value;
			break;
		case TM_RECEIVE:
			cur->metrics[TM_RECEIVE] = value;
			break;
		default:
			break;
	}

}

static uint32_t
find_metric (struct TM_Peer *dest, uint32_t type, int direction)
{
	struct PropManipulationEntry *cur;

	for (cur = dest->head; NULL != cur; cur = cur->next)
	{
		if (cur->type == type)
			return cur->metrics[direction];

	}
	return UINT32_MAX;
}

/**
 * Clean up metrics for a peer
 */

static void
free_metric (struct TM_Peer *dest)
{
	struct PropManipulationEntry *cur;
	struct PropManipulationEntry *next;

	for (cur = dest->head; NULL != cur; cur = next)
	{
		next = cur->next;
		GNUNET_CONTAINER_DLL_remove (dest->head, dest->tail, cur);
		GNUNET_free (cur);
	}
}


/**
 * Set traffic metric to manipulate
 *
 * @param cls closure
 * @param client client sending message
 * @param message containing information
 */
void
GST_manipulation_set_metric (void *cls, struct GNUNET_SERVER_Client *client,
    const struct GNUNET_MessageHeader *message)
{
	struct TrafficMetricMessage *tm = (struct TrafficMetricMessage *) message;
	struct GNUNET_PeerIdentity dummy;
	struct GNUNET_ATS_Information *ats;
	struct TM_Peer *tmp;
	uint32_t type;
	uint32_t value;
	uint16_t direction;
	int c;
	int c2;

	if (0 == ntohs (tm->ats_count))
	  GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);

	direction = TM_BOTH;
	switch (ntohs(tm->direction)) {
		case 1:
			direction = TM_SEND;
			break;
		case 2:
			direction = TM_RECEIVE;
			break;
		case 3:
			direction = TM_BOTH;
			break;
		default:
			break;
	}

	memset (&dummy, '\0', sizeof (struct GNUNET_PeerIdentity));
	if (0 == memcmp (&tm->peer, &dummy, sizeof (struct GNUNET_PeerIdentity)))
	{
			GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received traffic metrics for all peers \n");

			ats = (struct GNUNET_ATS_Information *) &tm[1];
			for (c = 0; c < ntohs (tm->ats_count); c++)
			{
					type = htonl (ats[c].type);
					value = htonl (ats[c].value);
					set_metric (&man_handle.general, direction, type, value);
			}
			return;
	}

	GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received traffic metrics for peer `%s'\n",
			GNUNET_i2s(&tm->peer));

	if (NULL == (tmp = GNUNET_CONTAINER_multipeermap_get (man_handle.peers, &tm->peer)))
	{
			tmp = GNUNET_new (struct TM_Peer);
			tmp->peer = (tm->peer);
			for (c = 0; c < TM_BOTH; c++)
			{
					for (c2 = 0; c2 < GNUNET_ATS_QualityPropertiesCount; c2++)
					{
							tmp->metrics[c][c2] = UINT32_MAX;
					}
			}
			GNUNET_CONTAINER_multipeermap_put (man_handle.peers,
							   &tm->peer, tmp,
							   GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
	}

	ats = (struct GNUNET_ATS_Information *) &tm[1];
	for (c = 0; c < ntohs (tm->ats_count); c++)
	{
			type = htonl (ats[c].type);
			value = htonl (ats[c].value);
			set_metric (tmp, direction, type, value);
	}

  GNUNET_SERVER_receive_done (client, GNUNET_OK);
}

static void
send_delayed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
	struct DelayQueueEntry *dqe = cls;
	struct DelayQueueEntry *next;
	struct TM_Peer *tmp = dqe->tmp;
	struct GNUNET_TIME_Relative delay;

	if (NULL != tmp)
	{
			GNUNET_break (GNUNET_YES == GST_neighbours_test_connected (&dqe->id));
			tmp->send_delay_task = GNUNET_SCHEDULER_NO_TASK;
			GNUNET_CONTAINER_DLL_remove (tmp->send_head, tmp->send_tail, dqe);
			GST_neighbours_send (&dqe->id, dqe->msg, dqe->msg_size, dqe->timeout, dqe->cont, dqe->cont_cls);

			next = tmp->send_head;
			if (NULL != next)
			{
				/* More delayed messages */
				delay = GNUNET_TIME_absolute_get_remaining (next->sent_at);
				tmp->send_delay_task = GNUNET_SCHEDULER_add_delayed (delay, &send_delayed, next);
			}
	}
	else
	{
			/* Remove from generic queue */
			GNUNET_break (GNUNET_YES == GST_neighbours_test_connected (&dqe->id));
			generic_send_delay_task = GNUNET_SCHEDULER_NO_TASK;
			GNUNET_CONTAINER_DLL_remove (generic_dqe_head, generic_dqe_tail, dqe);
			GST_neighbours_send (&dqe->id, dqe->msg, dqe->msg_size, dqe->timeout, dqe->cont, dqe->cont_cls);
			next = generic_dqe_head;
			if (NULL != next)
			{
				/* More delayed messages */
				delay = GNUNET_TIME_absolute_get_remaining (next->sent_at);
				generic_send_delay_task = GNUNET_SCHEDULER_add_delayed (delay, &send_delayed, next);
			}
	}
	GNUNET_free (dqe);
}


/**
 * Adapter function between transport's send function and transport plugins
 *
 * @param target the peer the message to send to
 * @param msg the message received
 * @param msg_size message size
 * @param timeout timeout
 * @param cont the continuation to call after sending
 * @param cont_cls cls for continuation
 */
void
GST_manipulation_send (const struct GNUNET_PeerIdentity *target, const void *msg,
    size_t msg_size, struct GNUNET_TIME_Relative timeout,
    GST_NeighbourSendContinuation cont, void *cont_cls)
{
  struct TM_Peer *tmp;
  struct DelayQueueEntry *dqe;
  struct GNUNET_TIME_Relative delay;

  if (NULL != (tmp = GNUNET_CONTAINER_multipeermap_get (man_handle.peers, target)))
  {
    GNUNET_break (GNUNET_YES == GST_neighbours_test_connected(target));
    /* Manipulate here */
    /* Delay */
    if (UINT32_MAX != find_metric(tmp, GNUNET_ATS_QUALITY_NET_DELAY, TM_SEND))
    {
      /* We have a delay */
      delay.rel_value_us = find_metric (tmp, GNUNET_ATS_QUALITY_NET_DELAY, TM_SEND);
      dqe = GNUNET_malloc (sizeof (struct DelayQueueEntry) + msg_size);
      dqe->id = *target;
      dqe->tmp = tmp;
      dqe->sent_at = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get(), delay);
      dqe->cont = cont;
      dqe->cont_cls = cont_cls;
      dqe->msg = &dqe[1];
      dqe->msg_size = msg_size;
      dqe->timeout = timeout;
      memcpy (dqe->msg, msg, msg_size);
      GNUNET_CONTAINER_DLL_insert_tail (tmp->send_head, tmp->send_tail, dqe);
      if (GNUNET_SCHEDULER_NO_TASK == tmp->send_delay_task)
        tmp->send_delay_task =GNUNET_SCHEDULER_add_delayed (delay, &send_delayed, dqe);
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
          "Delaying %u byte message to peer `%s' with generic delay for %ms\n",
          msg_size, GNUNET_i2s (target),
          GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
      return;
    }
  }
  else if (UINT32_MAX != find_metric (&man_handle.general, GNUNET_ATS_QUALITY_NET_DELAY, TM_SEND))
  {
    GNUNET_break (GNUNET_YES == GST_neighbours_test_connected(target));
    /* We have a delay */
    delay.rel_value_us = find_metric (&man_handle.general, GNUNET_ATS_QUALITY_NET_DELAY, TM_SEND);
    dqe = GNUNET_malloc (sizeof (struct DelayQueueEntry) + msg_size);
    dqe->id = *target;
    dqe->tmp = NULL;
    dqe->sent_at = GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get(), delay);
    dqe->cont = cont;
    dqe->cont_cls = cont_cls;
    dqe->msg = &dqe[1];
    dqe->msg_size = msg_size;
    dqe->timeout = timeout;
    memcpy (dqe->msg, msg, msg_size);
    GNUNET_CONTAINER_DLL_insert_tail (generic_dqe_head, generic_dqe_tail, dqe);
    if (GNUNET_SCHEDULER_NO_TASK == generic_send_delay_task)
    {
        generic_send_delay_task = GNUNET_SCHEDULER_add_delayed (delay, &send_delayed, dqe);
    }
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
        "Delaying %u byte message to peer `%s' with peer specific delay for %s\n",
        msg_size, GNUNET_i2s (target),
        GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
    return;
  }

  /* Normal sending */
  GST_neighbours_send (target, msg, msg_size, timeout, cont, cont_cls);
}


/**
 * Function that will be called to manipulate ATS information according to
 * current manipulation settings
 *
 * @param peer the peer
 * @param address binary address
 * @param session the session
 * @param ats the ats information
 * @param ats_count the number of ats information
 */
struct GNUNET_ATS_Information *
GST_manipulation_manipulate_metrics (const struct GNUNET_PeerIdentity *peer,
		const struct GNUNET_HELLO_Address *address,
		struct Session *session,
		const struct GNUNET_ATS_Information *ats,
		uint32_t ats_count)
{
	struct GNUNET_ATS_Information *ats_new = GNUNET_malloc (sizeof (struct GNUNET_ATS_Information) *ats_count);
	struct TM_Peer *tmp;
	uint32_t m_tmp;
	uint32_t g_tmp;
	int d;
	tmp = GNUNET_CONTAINER_multipeermap_get (man_handle.peers, peer);

	for (d = 0; d < ats_count; d++)
	{
		ats_new[d] = ats[d];
		m_tmp = UINT32_MAX;
		if (NULL != tmp)
			m_tmp = find_metric (tmp, ntohl(ats[d].type), TM_RECEIVE);
		g_tmp = find_metric (&man_handle.general, ntohl(ats[d].type), TM_RECEIVE);

		if (UINT32_MAX != g_tmp)
				ats_new[d].value = htonl(g_tmp);
		if (UINT32_MAX != m_tmp)
				ats_new[d].value = htonl(m_tmp);
	}

	return ats_new;
}


/**
 * Adapter function between transport plugins and transport receive function
 * manipulation delays for next send.
 *
 * @param cls the closure for transport
 * @param peer the peer the message was received from
 * @param message the message received
 * @param session the session the message was received on
 * @param sender_address the sender address
 * @param sender_address_len the length of the sender address
 * @return manipulated delay for next receive
 */
struct GNUNET_TIME_Relative
GST_manipulation_recv (void *cls,
		const struct GNUNET_PeerIdentity *peer,
    const struct GNUNET_MessageHeader *message,
    struct Session *session,
    const char *sender_address,
    uint16_t sender_address_len)
{
	struct TM_Peer *tmp;
	uint32_t p_recv_delay;
	uint32_t g_recv_delay;
	struct GNUNET_TIME_Relative quota_delay;
	struct GNUNET_TIME_Relative m_delay;

	g_recv_delay = find_metric (&man_handle.general, GNUNET_ATS_QUALITY_NET_DELAY, TM_RECEIVE);
	if ((g_recv_delay >= GNUNET_TIME_UNIT_ZERO.rel_value_us) && (UINT32_MAX != g_recv_delay))
	  m_delay.rel_value_us = g_recv_delay; /* Global delay */
	else
	  m_delay = GNUNET_TIME_UNIT_ZERO;

	if (NULL != (tmp = GNUNET_CONTAINER_multipeermap_get (man_handle.peers, peer)))
	{
	  /* Manipulate receive delay */
	  p_recv_delay = find_metric (tmp, GNUNET_ATS_QUALITY_NET_DELAY, TM_RECEIVE);
	  if (UINT32_MAX != p_recv_delay)
	    m_delay.rel_value_us = p_recv_delay; /* Peer specific delay */
	}

	quota_delay = GST_receive_callback (cls, peer, message,
			session, sender_address, sender_address_len);

	if (quota_delay.rel_value_us > m_delay.rel_value_us)
		m_delay = quota_delay;

	GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
		    "Delaying next receive for peer `%s' for %s\n",
		    GNUNET_i2s (peer),
		    GNUNET_STRINGS_relative_time_to_string (m_delay, GNUNET_YES));
	return m_delay;

}


/**
 * Initialize traffic manipulation
 *
 * @param GST_cfg configuration handle
 */
void
GST_manipulation_init (const struct GNUNET_CONFIGURATION_Handle *GST_cfg)
{
  unsigned long long tmp;
  struct GNUNET_TIME_Relative delay;

  if ( (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (GST_cfg,
							  "transport",
							  "MANIPULATE_DISTANCE_IN",
							    &tmp)) &&
	(tmp > 0) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		"Setting inbound distance_in to %llu\n",
		(unsigned long long) tmp);
    set_metric (&man_handle.general, TM_RECEIVE, GNUNET_ATS_QUALITY_NET_DISTANCE, tmp);
  }

  if ( (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (GST_cfg,
							    "transport",
							    "MANIPULATE_DISTANCE_OUT",
							    &tmp)) &&
       (tmp > 0) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		"Setting outbound distance_in to %llu\n",
		(unsigned long long) tmp);
    set_metric (&man_handle.general, TM_SEND,
		GNUNET_ATS_QUALITY_NET_DISTANCE, tmp);
  }

  if ( (GNUNET_OK == GNUNET_CONFIGURATION_get_value_time (GST_cfg,
							  "transport",
							  "MANIPULATE_DELAY_IN",
							  &delay)) &&
       (delay.rel_value_us > 0) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		"Delaying inbound traffic for %s\n",
		GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
    set_metric (&man_handle.general, TM_RECEIVE,
		GNUNET_ATS_QUALITY_NET_DELAY,
		delay.rel_value_us);
  }
  if ( (GNUNET_OK == GNUNET_CONFIGURATION_get_value_time (GST_cfg,
							  "transport",
							  "MANIPULATE_DELAY_OUT",
							  &delay)) &&
       (delay.rel_value_us > 0) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		"Delaying outbound traffic for %s\n",
		GNUNET_STRINGS_relative_time_to_string (delay, GNUNET_YES));
    set_metric (&man_handle.general,
		TM_SEND,
		GNUNET_ATS_QUALITY_NET_DELAY,
		delay.rel_value_us);
  }
  man_handle.peers = GNUNET_CONTAINER_multipeermap_create (10, GNUNET_NO);
}


static int
free_tmps (void *cls,
	   const struct GNUNET_PeerIdentity *key,
	   void *value)
{
  struct DelayQueueEntry *dqe;
  struct DelayQueueEntry *next;

  if (NULL != value)
  {
    struct TM_Peer *tmp = (struct TM_Peer *) value;

    if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove (man_handle.peers, key, value))
      GNUNET_break (0);
    free_metric (tmp);
    next = tmp->send_head;
    while (NULL != (dqe = next))
      {
	next = dqe->next;
	GNUNET_CONTAINER_DLL_remove (tmp->send_head, tmp->send_tail, dqe);
	if (NULL != dqe->cont)
	  dqe->cont (dqe->cont_cls, GNUNET_SYSERR, dqe->msg_size, 0);
	GNUNET_free (dqe);
      }
    if (GNUNET_SCHEDULER_NO_TASK != tmp->send_delay_task)
      {
	GNUNET_SCHEDULER_cancel (tmp->send_delay_task);
	tmp->send_delay_task = GNUNET_SCHEDULER_NO_TASK;
      }
    GNUNET_free (tmp);
  }
  return GNUNET_OK;
}


/**
 * Notify manipulation about disconnect so it can discard queued messages
 *
 * @param peer the disconnecting peer
 */
void
GST_manipulation_peer_disconnect (const struct GNUNET_PeerIdentity *peer)
{
	struct TM_Peer *tmp;
	struct DelayQueueEntry *dqe;
	struct DelayQueueEntry *next;

	if (NULL != (tmp = GNUNET_CONTAINER_multipeermap_get (man_handle.peers, peer)))
	{
			next = tmp->send_head;
			while (NULL != (dqe = next))
			{
					next = dqe->next;
					GNUNET_CONTAINER_DLL_remove (tmp->send_head, tmp->send_tail, dqe);
					if (NULL != dqe->cont)
							dqe->cont (dqe->cont_cls, GNUNET_SYSERR, dqe->msg_size, 0);
					GNUNET_free (dqe);
			}
	}
	else if (UINT32_MAX != find_metric (&man_handle.general, GNUNET_ATS_QUALITY_NET_DELAY, TM_SEND))
	{
			next = generic_dqe_head;
			while (NULL != (dqe = next))
			{
					next = dqe->next;
					if (0 == memcmp (peer, &dqe->id, sizeof (dqe->id)))
					{
							GNUNET_CONTAINER_DLL_remove (generic_dqe_head, generic_dqe_tail, dqe);
							if (NULL != dqe->cont)
								dqe->cont (dqe->cont_cls, GNUNET_SYSERR, dqe->msg_size, 0);
							GNUNET_free (dqe);
					}
			}
			if (GNUNET_SCHEDULER_NO_TASK != generic_send_delay_task)
			{
					GNUNET_SCHEDULER_cancel (generic_send_delay_task);
					if (NULL != generic_dqe_head)
						generic_send_delay_task = GNUNET_SCHEDULER_add_delayed (
								GNUNET_TIME_absolute_get_remaining(generic_dqe_head->sent_at),
								&send_delayed, generic_dqe_head);
			}
	}
}


/**
 * Stop traffic manipulation
 */
void
GST_manipulation_stop ()
{
	struct DelayQueueEntry *cur;
	struct DelayQueueEntry *next;
	GNUNET_CONTAINER_multipeermap_iterate (man_handle.peers, &free_tmps,NULL);
	GNUNET_CONTAINER_multipeermap_destroy (man_handle.peers);

	next = generic_dqe_head;
	while (NULL != (cur = next))
	{
			next = cur->next;
			GNUNET_CONTAINER_DLL_remove (generic_dqe_head, generic_dqe_tail, cur);
			if (NULL != cur->cont)
				cur->cont (cur->cont_cls, GNUNET_SYSERR, cur->msg_size, 0);
			GNUNET_free (cur);
	}
	if (GNUNET_SCHEDULER_NO_TASK != generic_send_delay_task)
	{
			GNUNET_SCHEDULER_cancel (generic_send_delay_task);
			generic_send_delay_task = GNUNET_SCHEDULER_NO_TASK;
	}

	free_metric (&man_handle.general);
	man_handle.peers = NULL;
}


/* end of file gnunet-service-transport_manipulation.c */