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diff --git a/src/transport/gnunet-service-transport_neighbours_3way.c b/src/transport/gnunet-service-transport_neighbours_3way.c
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1/*
2 This file is part of GNUnet.
3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
19*/
20
21/**
22 * @file transport/gnunet-service-transport_neighbours.c
23 * @brief neighbour management
24 * @author Christian Grothoff
25 */
26#include "platform.h"
27#include "gnunet_ats_service.h"
28#include "gnunet-service-transport_neighbours.h"
29#include "gnunet-service-transport_plugins.h"
30#include "gnunet-service-transport_validation.h"
31#include "gnunet-service-transport_clients.h"
32#include "gnunet-service-transport.h"
33#include "gnunet_peerinfo_service.h"
34#include "gnunet-service-transport_blacklist.h"
35#include "gnunet_constants.h"
36#include "transport.h"
37
38
39/**
40 * Size of the neighbour hash map.
41 */
42#define NEIGHBOUR_TABLE_SIZE 256
43
44/**
45 * How often must a peer violate bandwidth quotas before we start
46 * to simply drop its messages?
47 */
48#define QUOTA_VIOLATION_DROP_THRESHOLD 10
49
50/**
51 * How often do we send KEEPALIVE messages to each of our neighbours?
52 * (idle timeout is 5 minutes or 300 seconds, so with 90s interval we
53 * send 3 keepalives in each interval, so 3 messages would need to be
54 * lost in a row for a disconnect).
55 */
56#define KEEPALIVE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 90)
57
58
59/**
60 * Entry in neighbours.
61 */
62struct NeighbourMapEntry;
63
64/**
65 * Message a peer sends to another to indicate its
66 * preference for communicating via a particular
67 * session (and the desire to establish a real
68 * connection).
69 */
70struct SessionConnectMessage
71{
72 /**
73 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT'
74 */
75 struct GNUNET_MessageHeader header;
76
77 /**
78 * Always zero.
79 */
80 uint32_t reserved GNUNET_PACKED;
81
82 /**
83 * Absolute time at the sender. Only the most recent connect
84 * message implies which session is preferred by the sender.
85 */
86 struct GNUNET_TIME_AbsoluteNBO timestamp;
87
88};
89
90
91struct SessionDisconnectMessage
92{
93 /**
94 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT'
95 */
96 struct GNUNET_MessageHeader header;
97
98 /**
99 * Always zero.
100 */
101 uint32_t reserved GNUNET_PACKED;
102
103 /**
104 * Purpose of the signature. Extends over the timestamp.
105 * Purpose should be GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
106 */
107 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
108
109 /**
110 * Absolute time at the sender. Only the most recent connect
111 * message implies which session is preferred by the sender.
112 */
113 struct GNUNET_TIME_AbsoluteNBO timestamp;
114
115 /**
116 * Public key of the sender.
117 */
118 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
119
120 /**
121 * Signature of the peer that sends us the disconnect. Only
122 * valid if the timestamp is AFTER the timestamp from the
123 * corresponding 'CONNECT' message.
124 */
125 struct GNUNET_CRYPTO_RsaSignature signature;
126
127};
128
129
130/**
131 * For each neighbour we keep a list of messages
132 * that we still want to transmit to the neighbour.
133 */
134struct MessageQueue
135{
136
137 /**
138 * This is a doubly linked list.
139 */
140 struct MessageQueue *next;
141
142 /**
143 * This is a doubly linked list.
144 */
145 struct MessageQueue *prev;
146
147 /**
148 * Once this message is actively being transmitted, which
149 * neighbour is it associated with?
150 */
151 struct NeighbourMapEntry *n;
152
153 /**
154 * Function to call once we're done.
155 */
156 GST_NeighbourSendContinuation cont;
157
158 /**
159 * Closure for 'cont'
160 */
161 void *cont_cls;
162
163 /**
164 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
165 * stuck together in memory. Allocated at the end of this struct.
166 */
167 const char *message_buf;
168
169 /**
170 * Size of the message buf
171 */
172 size_t message_buf_size;
173
174 /**
175 * At what time should we fail?
176 */
177 struct GNUNET_TIME_Absolute timeout;
178
179};
180
181enum State
182{
183 /* fresh peer or completely disconnected */
184 S_NOT_CONNECTED = 0,
185 /* sent CONNECT message to other peer, waiting for CONNECT_ACK */
186 S_CONNECT_SENT = 1,
187 /* received CONNECT message to other peer, sending CONNECT_ACK */
188 S_CONNECT_RECV = 4,
189 /* sent CONNECT_ACK message to other peer, wait for ACK or payload */
190 S_CONNECT_RECV_ACK_SENT = 8,
191 /* received ACK or payload */
192 S_CONNECTED = 16,
193 /* Disconnect in progress */
194 S_DISCONNECT = 32
195};
196
197/**
198 * Entry in neighbours.
199 */
200struct NeighbourMapEntry
201{
202
203 /**
204 * Head of list of messages we would like to send to this peer;
205 * must contain at most one message per client.
206 */
207 struct MessageQueue *messages_head;
208
209 /**
210 * Tail of list of messages we would like to send to this peer; must
211 * contain at most one message per client.
212 */
213 struct MessageQueue *messages_tail;
214
215 /**
216 * Performance data for the peer.
217 */
218 //struct GNUNET_ATS_Information *ats;
219
220 /**
221 * Are we currently trying to send a message? If so, which one?
222 */
223 struct MessageQueue *is_active;
224
225 /**
226 * Active session for communicating with the peer.
227 */
228 struct Session *session;
229
230 /**
231 * Name of the plugin we currently use.
232 */
233 char *plugin_name;
234
235 /**
236 * Address used for communicating with the peer, NULL for inbound connections.
237 */
238 void *addr;
239
240 /**
241 * Number of bytes in 'addr'.
242 */
243 size_t addrlen;
244
245 /**
246 * Identity of this neighbour.
247 */
248 struct GNUNET_PeerIdentity id;
249
250 /**
251 * ID of task scheduled to run when this peer is about to
252 * time out (will free resources associated with the peer).
253 */
254 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
255
256 /**
257 * ID of task scheduled to send keepalives.
258 */
259 GNUNET_SCHEDULER_TaskIdentifier keepalive_task;
260
261 /**
262 * ID of task scheduled to run when we should try transmitting
263 * the head of the message queue.
264 */
265 GNUNET_SCHEDULER_TaskIdentifier transmission_task;
266
267 /**
268 * Tracker for inbound bandwidth.
269 */
270 struct GNUNET_BANDWIDTH_Tracker in_tracker;
271
272 /**
273 * Inbound bandwidth from ATS, activated when connection is up
274 */
275 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
276
277 /**
278 * Inbound bandwidth from ATS, activated when connection is up
279 */
280 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
281
282 /**
283 * Timestamp of the 'SESSION_CONNECT' message we got from the other peer
284 */
285 struct GNUNET_TIME_Absolute connect_ts;
286
287 /**
288 * How often has the other peer (recently) violated the inbound
289 * traffic limit? Incremented by 10 per violation, decremented by 1
290 * per non-violation (for each time interval).
291 */
292 unsigned int quota_violation_count;
293
294 /**
295 * Number of values in 'ats' array.
296 */
297 //unsigned int ats_count;
298
299
300 /**
301 * Do we currently consider this neighbour connected? (as far as
302 * the connect/disconnect callbacks are concerned)?
303 */
304 //int is_connected;
305
306 int state;
307
308};
309
310
311/**
312 * All known neighbours and their HELLOs.
313 */
314static struct GNUNET_CONTAINER_MultiHashMap *neighbours;
315
316/**
317 * Closure for connect_notify_cb and disconnect_notify_cb
318 */
319static void *callback_cls;
320
321/**
322 * Function to call when we connected to a neighbour.
323 */
324static GNUNET_TRANSPORT_NotifyConnect connect_notify_cb;
325
326/**
327 * Function to call when we disconnected from a neighbour.
328 */
329static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
330
331/**
332 * counter for connected neighbours
333 */
334static int neighbours_connected;
335
336/**
337 * Lookup a neighbour entry in the neighbours hash map.
338 *
339 * @param pid identity of the peer to look up
340 * @return the entry, NULL if there is no existing record
341 */
342static struct NeighbourMapEntry *
343lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
344{
345 return GNUNET_CONTAINER_multihashmap_get (neighbours, &pid->hashPubKey);
346}
347
348#define change_state(n, state, ...) change (n, state, __LINE__)
349
350static int
351is_connecting (struct NeighbourMapEntry * n)
352{
353 if ((n->state > S_NOT_CONNECTED) && (n->state < S_CONNECTED))
354 return GNUNET_YES;
355 return GNUNET_NO;
356}
357
358static int
359is_connected (struct NeighbourMapEntry * n)
360{
361 if (n->state == S_CONNECTED)
362 return GNUNET_YES;
363 return GNUNET_NO;
364}
365
366static int
367is_disconnecting (struct NeighbourMapEntry * n)
368{
369 if (n->state == S_DISCONNECT)
370 return GNUNET_YES;
371 return GNUNET_NO;
372}
373
374static const char *
375print_state (int state)
376{
377 switch (state) {
378 case S_CONNECTED:
379 return "S_CONNECTED";
380 break;
381 case S_CONNECT_RECV:
382 return "S_CONNECT_RECV";
383 break;
384 case S_CONNECT_RECV_ACK_SENT:
385 return"S_CONNECT_RECV_ACK_SENT";
386 break;
387 case S_CONNECT_SENT:
388 return "S_CONNECT_SENT";
389 break;
390 case S_DISCONNECT:
391 return "S_DISCONNECT";
392 break;
393 case S_NOT_CONNECTED:
394 return "S_NOT_CONNECTED";
395 break;
396 default:
397 GNUNET_break (0);
398 break;
399 }
400 return NULL;
401}
402
403static int
404change (struct NeighbourMapEntry * n, int state, int line)
405{
406 char * old = strdup(print_state(n->state));
407 char * new = strdup(print_state(state));
408
409 /* allowed transitions */
410 int allowed = GNUNET_NO;
411 switch (n->state) {
412 case S_NOT_CONNECTED:
413 if ((state == S_CONNECT_RECV) || (state == S_CONNECT_SENT) ||
414 (state == S_DISCONNECT))
415 {
416 allowed = GNUNET_YES;
417 break;
418 }
419 break;
420 case S_CONNECT_RECV:
421 if ((state == S_NOT_CONNECTED) || (state == S_DISCONNECT) ||
422 (state == S_CONNECTED))
423 {
424 allowed = GNUNET_YES;
425 break;
426 }
427 break;
428 case S_CONNECT_SENT:
429 if ((state == S_NOT_CONNECTED) || (state == S_CONNECTED) ||
430 (state == S_DISCONNECT) || /* FIXME SENT -> RECV ISSUE!*/ (state == S_CONNECT_RECV))
431 {
432 allowed = GNUNET_YES;
433 break;
434 }
435 break;
436 case S_CONNECTED:
437 if (state == S_DISCONNECT)
438 {
439 allowed = GNUNET_YES;
440 break;
441 }
442 break;
443 case S_DISCONNECT:
444 /*
445 if (state == S_NOT_CONNECTED)
446 {
447 allowed = GNUNET_YES;
448 break;
449 }*/
450 break;
451 default:
452 GNUNET_break (0);
453 break;
454
455 }
456
457 if (allowed == GNUNET_NO)
458 {
459 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
460 "Illegal state transition from `%s' to `%s' in line %u \n",
461 old, new, line);
462 GNUNET_break (0);
463 GNUNET_free (old);
464 GNUNET_free (new);
465 return GNUNET_SYSERR;
466 }
467
468 n->state = state;
469 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "State for neighbour `%s' %X changed from `%s' to `%s' in line %u\n",
470 GNUNET_i2s (&n->id), n, old, new, line);
471 GNUNET_free (old);
472 GNUNET_free (new);
473 return GNUNET_OK;
474}
475
476static ssize_t
477send_with_plugin ( const struct GNUNET_PeerIdentity * target,
478 const char *msgbuf,
479 size_t msgbuf_size,
480 uint32_t priority,
481 struct GNUNET_TIME_Relative timeout,
482 struct Session * session,
483 const char * plugin_name,
484 const void *addr,
485 size_t addrlen,
486 int force_address,
487 GNUNET_TRANSPORT_TransmitContinuation cont,
488 void *cont_cls)
489
490{
491 struct GNUNET_TRANSPORT_PluginFunctions *papi;
492 size_t ret = GNUNET_SYSERR;
493
494 papi = GST_plugins_find (plugin_name);
495 if (papi == NULL)
496 {
497 if (cont != NULL)
498 cont (cont_cls, target, GNUNET_SYSERR);
499 return GNUNET_SYSERR;
500 }
501
502 ret = papi->send (papi->cls,
503 target,
504 msgbuf, msgbuf_size,
505 0,
506 timeout,
507 session,
508 addr, addrlen,
509 GNUNET_YES,
510 cont, cont_cls);
511
512 if (ret == -1)
513 {
514 if (cont != NULL)
515 cont (cont_cls, target, GNUNET_SYSERR);
516 }
517 return ret;
518}
519
520/**
521 * Task invoked to start a transmission to another peer.
522 *
523 * @param cls the 'struct NeighbourMapEntry'
524 * @param tc scheduler context
525 */
526static void
527transmission_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
528
529
530/**
531 * We're done with our transmission attempt, continue processing.
532 *
533 * @param cls the 'struct MessageQueue' of the message
534 * @param receiver intended receiver
535 * @param success whether it worked or not
536 */
537static void
538transmit_send_continuation (void *cls,
539 const struct GNUNET_PeerIdentity *receiver,
540 int success)
541{
542 struct MessageQueue *mq;
543 struct NeighbourMapEntry *n;
544
545 mq = cls;
546 n = mq->n;
547 if (NULL != n)
548 {
549 GNUNET_assert (n->is_active == mq);
550 n->is_active = NULL;
551 if (success == GNUNET_YES)
552 {
553 GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
554 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
555 }
556 }
557#if DEBUG_TRANSPORT
558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending message of type %u was %s\n",
559 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
560 (success == GNUNET_OK) ? "successful" : "FAILED");
561#endif
562 if (NULL != mq->cont)
563 mq->cont (mq->cont_cls, success);
564 GNUNET_free (mq);
565}
566
567
568/**
569 * Check the ready list for the given neighbour and if a plugin is
570 * ready for transmission (and if we have a message), do so!
571 *
572 * @param n target peer for which to transmit
573 */
574static void
575try_transmission_to_peer (struct NeighbourMapEntry *n)
576{
577 struct MessageQueue *mq;
578 struct GNUNET_TIME_Relative timeout;
579 ssize_t ret;
580
581 if (n->is_active != NULL)
582 {
583 GNUNET_break (0);
584 return; /* transmission already pending */
585 }
586 if (n->transmission_task != GNUNET_SCHEDULER_NO_TASK)
587 {
588 GNUNET_break (0);
589 return; /* currently waiting for bandwidth */
590 }
591 while (NULL != (mq = n->messages_head))
592 {
593 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
594 if (timeout.rel_value > 0)
595 break;
596 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
597 n->is_active = mq;
598 mq->n = n;
599 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR); /* timeout */
600 }
601 if (NULL == mq)
602 return; /* no more messages */
603
604 if (GST_plugins_find (n->plugin_name) == NULL)
605 {
606 GNUNET_break (0);
607 return;
608 }
609 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
610 n->is_active = mq;
611 mq->n = n;
612
613 if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen == 0))
614 {
615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No address for peer `%s'\n",
616 GNUNET_i2s (&n->id));
617 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
618 GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
619 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
620 return;
621 }
622
623 ret = send_with_plugin (&n->id,
624 mq->message_buf, mq->message_buf_size, 0,
625 timeout,
626 n->session, n->plugin_name, n->addr, n->addrlen,
627 GNUNET_YES,
628 &transmit_send_continuation, mq);
629 if (ret == -1)
630 {
631 /* failure, but 'send' would not call continuation in this case,
632 * so we need to do it here! */
633 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
634 }
635
636}
637
638
639/**
640 * Task invoked to start a transmission to another peer.
641 *
642 * @param cls the 'struct NeighbourMapEntry'
643 * @param tc scheduler context
644 */
645static void
646transmission_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
647{
648 struct NeighbourMapEntry *n = cls;
649 GNUNET_assert (NULL != lookup_neighbour(&n->id));
650 n->transmission_task = GNUNET_SCHEDULER_NO_TASK;
651 try_transmission_to_peer (n);
652}
653
654
655/**
656 * Initialize the neighbours subsystem.
657 *
658 * @param cls closure for callbacks
659 * @param connect_cb function to call if we connect to a peer
660 * @param disconnect_cb function to call if we disconnect from a peer
661 */
662void
663GST_neighbours_start (void *cls, GNUNET_TRANSPORT_NotifyConnect connect_cb,
664 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb)
665{
666 callback_cls = cls;
667 connect_notify_cb = connect_cb;
668 disconnect_notify_cb = disconnect_cb;
669 neighbours = GNUNET_CONTAINER_multihashmap_create (NEIGHBOUR_TABLE_SIZE);
670}
671
672/*
673static void
674send_disconnect_cont (void *cls,
675 const struct GNUNET_PeerIdentity * target,
676 int result)
677{
678 struct NeighbourMapEntry *n = cls;
679
680}*/
681
682static int
683send_disconnect (struct NeighbourMapEntry *n)
684{
685 size_t ret;
686 struct SessionDisconnectMessage disconnect_msg;
687
688#if DEBUG_TRANSPORT
689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending DISCONNECT message to peer `%4s'\n",
690 GNUNET_i2s (&n->id));
691#endif
692
693 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
694 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
695 disconnect_msg.reserved = htonl (0);
696 disconnect_msg.purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
697 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
698 sizeof (struct GNUNET_TIME_AbsoluteNBO) );
699 disconnect_msg.purpose.purpose = htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
700 disconnect_msg.timestamp = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
701 disconnect_msg.public_key = GST_my_public_key;
702 GNUNET_assert (GNUNET_OK ==
703 GNUNET_CRYPTO_rsa_sign (GST_my_private_key,
704 &disconnect_msg.purpose,
705 &disconnect_msg.signature));
706
707 ret = send_with_plugin(&n->id,
708 (const char *) &disconnect_msg, sizeof (disconnect_msg),
709 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, n->session, n->plugin_name, n->addr, n->addrlen,
710 GNUNET_YES, NULL, NULL);
711
712 if (ret == GNUNET_SYSERR)
713 return GNUNET_SYSERR;
714
715 GNUNET_STATISTICS_update (GST_stats,
716 gettext_noop ("# peers disconnected due to external request"), 1,
717 GNUNET_NO);
718 return GNUNET_OK;
719}
720
721/**
722 * Disconnect from the given neighbour, clean up the record.
723 *
724 * @param n neighbour to disconnect from
725 */
726static void
727disconnect_neighbour (struct NeighbourMapEntry *n)
728{
729 struct MessageQueue *mq;
730 int was_connected = is_connected(n);
731
732 if (is_disconnecting(n) == GNUNET_YES)
733 return;
734
735 /* send DISCONNECT MESSAGE */
736 if (is_connected(n) || is_connecting(n))
737 {
738 if (GNUNET_OK == send_disconnect(n))
739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sent DISCONNECT_MSG to `%s'\n",
740 GNUNET_i2s (&n->id));
741 else
742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Could not send DISCONNECT_MSG to `%s'\n",
743 GNUNET_i2s (&n->id));
744 }
745
746
747 if (is_disconnecting(n))
748 return;
749 change_state (n, S_DISCONNECT);
750
751 while (NULL != (mq = n->messages_head))
752 {
753 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
754 if (NULL != mq->cont)
755 mq->cont (mq->cont_cls, GNUNET_SYSERR);
756 GNUNET_free (mq);
757 }
758 if (NULL != n->is_active)
759 {
760 n->is_active->n = NULL;
761 n->is_active = NULL;
762 }
763 if (was_connected)
764 {
765 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->keepalive_task);
766 GNUNET_SCHEDULER_cancel (n->keepalive_task);
767 n->keepalive_task = GNUNET_SCHEDULER_NO_TASK;
768 GNUNET_assert (neighbours_connected > 0);
769 neighbours_connected--;
770 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), -1,
771 GNUNET_NO);
772 disconnect_notify_cb (callback_cls, &n->id);
773 }
774 GNUNET_assert (GNUNET_YES ==
775 GNUNET_CONTAINER_multihashmap_remove (neighbours,
776 &n->id.hashPubKey, n));
777 if (GNUNET_SCHEDULER_NO_TASK != n->timeout_task)
778 {
779 GNUNET_SCHEDULER_cancel (n->timeout_task);
780 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
781 }
782 if (GNUNET_SCHEDULER_NO_TASK != n->transmission_task)
783 {
784 GNUNET_SCHEDULER_cancel (n->transmission_task);
785 n->transmission_task = GNUNET_SCHEDULER_NO_TASK;
786 }
787 if (NULL != n->plugin_name)
788 {
789 GNUNET_free (n->plugin_name);
790 n->plugin_name = NULL;
791 }
792 if (NULL != n->addr)
793 {
794 GNUNET_free (n->addr);
795 n->addr = NULL;
796 n->addrlen = 0;
797 }
798 n->session = NULL;
799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deleting peer `%4s', %X\n",
800 GNUNET_i2s (&n->id), n);
801 GNUNET_free (n);
802}
803
804
805/**
806 * Peer has been idle for too long. Disconnect.
807 *
808 * @param cls the 'struct NeighbourMapEntry' of the neighbour that went idle
809 * @param tc scheduler context
810 */
811static void
812neighbour_timeout_task (void *cls,
813 const struct GNUNET_SCHEDULER_TaskContext *tc)
814{
815 struct NeighbourMapEntry *n = cls;
816
817 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
818
819 GNUNET_STATISTICS_update (GST_stats,
820 gettext_noop ("# peers disconnected due to timeout"), 1,
821 GNUNET_NO);
822 disconnect_neighbour (n);
823}
824
825
826/**
827 * Send another keepalive message.
828 *
829 * @param cls the 'struct NeighbourMapEntry' of the neighbour that went idle
830 * @param tc scheduler context
831 */
832static void
833neighbour_keepalive_task (void *cls,
834 const struct GNUNET_SCHEDULER_TaskContext *tc)
835{
836 struct NeighbourMapEntry *n = cls;
837 struct GNUNET_MessageHeader m;
838
839 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
840 &neighbour_keepalive_task,
841 n);
842 GNUNET_assert (is_connected(n));
843 GNUNET_STATISTICS_update (GST_stats,
844 gettext_noop ("# keepalives sent"), 1,
845 GNUNET_NO);
846 m.size = htons (sizeof (struct GNUNET_MessageHeader));
847 m.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
848
849 send_with_plugin(&n->id, (const void *) &m,
850 sizeof (m),
851 UINT32_MAX /* priority */ ,
852 GNUNET_TIME_UNIT_FOREVER_REL,
853 n->session, n->plugin_name, n->addr, n->addrlen,
854 GNUNET_YES, NULL, NULL);
855}
856
857
858/**
859 * Disconnect from the given neighbour.
860 *
861 * @param cls unused
862 * @param key hash of neighbour's public key (not used)
863 * @param value the 'struct NeighbourMapEntry' of the neighbour
864 */
865static int
866disconnect_all_neighbours (void *cls, const GNUNET_HashCode * key, void *value)
867{
868 struct NeighbourMapEntry *n = value;
869
870#if DEBUG_TRANSPORT
871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s', %s\n",
872 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
873#endif
874 if (is_connected(n))
875 GNUNET_STATISTICS_update (GST_stats,
876 gettext_noop ("# peers disconnected due to global disconnect"), 1,
877 GNUNET_NO);
878 disconnect_neighbour (n);
879 return GNUNET_OK;
880}
881
882
883/**
884 * Cleanup the neighbours subsystem.
885 */
886void
887GST_neighbours_stop ()
888{
889 GNUNET_assert (neighbours != NULL);
890
891 GNUNET_CONTAINER_multihashmap_iterate (neighbours, &disconnect_all_neighbours,
892 NULL);
893 GNUNET_CONTAINER_multihashmap_destroy (neighbours);
894 GNUNET_assert (neighbours_connected == 0);
895 neighbours = NULL;
896 callback_cls = NULL;
897 connect_notify_cb = NULL;
898 disconnect_notify_cb = NULL;
899}
900
901
902/**
903 * We tried to send a SESSION_CONNECT message to another peer. If this
904 * succeeded, we change the state. If it failed, we should tell
905 * ATS to not use this address anymore (until it is re-validated).
906 *
907 * @param cls the 'struct NeighbourMapEntry'
908 * @param success GNUNET_OK on success
909 */
910static void
911send_connect_continuation (void *cls,
912 const struct GNUNET_PeerIdentity * target,
913 int success)
914
915{
916 struct NeighbourMapEntry *n = cls;
917
918 GNUNET_assert (n != NULL);
919 GNUNET_assert (!is_connected(n));
920
921 if (is_disconnecting(n))
922 return; /* neighbour is going away */
923 if (GNUNET_YES != success)
924 {
925#if DEBUG_TRANSPORT
926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
927 "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
928 GNUNET_i2s (&n->id), n->plugin_name,
929 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
930 n->addr,
931 n->addrlen),
932 n->session);
933#endif
934
935 GNUNET_ATS_address_destroyed (GST_ats,
936 &n->id,
937 n->plugin_name,
938 n->addr,
939 n->addrlen,
940 NULL);
941
942 GNUNET_ATS_suggest_address(GST_ats, &n->id);
943 return;
944 }
945 change_state(n, S_CONNECT_SENT);
946}
947
948
949/**
950 * We tried to switch addresses with an peer already connected. If it failed,
951 * we should tell ATS to not use this address anymore (until it is re-validated).
952 *
953 * @param cls the 'struct NeighbourMapEntry'
954 * @param success GNUNET_OK on success
955 */
956static void
957send_switch_address_continuation (void *cls,
958 const struct GNUNET_PeerIdentity * target,
959 int success)
960
961{
962 struct NeighbourMapEntry *n = cls;
963
964 GNUNET_assert (n != NULL);
965 if (is_disconnecting(n))
966 return; /* neighbour is going away */
967
968 GNUNET_assert (n->state == S_CONNECTED);
969 if (GNUNET_YES != success)
970 {
971#if DEBUG_TRANSPORT
972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
973 "Failed to switch connected peer `%s' to plugin `%s' address '%s' session %X, asking ATS for new address \n",
974 GNUNET_i2s (&n->id), n->plugin_name,
975 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
976 n->addr,
977 n->addrlen),
978 n->session);
979#endif
980
981 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Do not forget to fix this!\n");
982 /* FIXME: We have to change the state away from connected:
983 * If ATS can not suggest another address we do not get a callback
984 * but we still think we are connected
985 */
986 //change_state(n, S_NOT_CONNECTED);
987
988 GNUNET_ATS_address_destroyed (GST_ats,
989 &n->id,
990 n->plugin_name,
991 n->addr,
992 n->addrlen,
993 NULL);
994
995 GNUNET_ATS_suggest_address(GST_ats, &n->id);
996 return;
997 }
998}
999
1000/**
1001 * We tried to send a SESSION_CONNECT message to another peer. If this
1002 * succeeded, we change the state. If it failed, we should tell
1003 * ATS to not use this address anymore (until it is re-validated).
1004 *
1005 * @param cls the 'struct NeighbourMapEntry'
1006 * @param success GNUNET_OK on success
1007 */
1008static void
1009send_connect_ack_continuation (void *cls,
1010 const struct GNUNET_PeerIdentity * target,
1011 int success)
1012
1013{
1014 struct NeighbourMapEntry *n = cls;
1015
1016 GNUNET_assert (n != NULL);
1017
1018 if (GNUNET_YES == success)
1019 return; /* sending successful */
1020
1021 /* sending failed, ask for next address */
1022#if DEBUG_TRANSPORT
1023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1024 "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
1025 GNUNET_i2s (&n->id), n->plugin_name,
1026 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1027 n->addr,
1028 n->addrlen),
1029 n->session);
1030#endif
1031 change_state(n, S_NOT_CONNECTED);
1032
1033 GNUNET_ATS_address_destroyed (GST_ats,
1034 &n->id,
1035 n->plugin_name,
1036 n->addr,
1037 n->addrlen,
1038 NULL);
1039
1040 GNUNET_ATS_suggest_address(GST_ats, &n->id);
1041}
1042
1043/**
1044 * For an existing neighbour record, set the active connection to
1045 * the given address.
1046 *
1047 * @param peer identity of the peer to switch the address for
1048 * @param plugin_name name of transport that delivered the PONG
1049 * @param address address of the other peer, NULL if other peer
1050 * connected to us
1051 * @param address_len number of bytes in address
1052 * @param session session to use (or NULL)
1053 * @param ats performance data
1054 * @param ats_count number of entries in ats
1055 * @return GNUNET_YES if we are currently connected, GNUNET_NO if the
1056 * connection is not up (yet)
1057 */
1058int
1059GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
1060 const char *plugin_name, const void *address,
1061 size_t address_len, struct Session *session,
1062 const struct GNUNET_ATS_Information
1063 *ats, uint32_t ats_count,
1064 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1065 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
1066{
1067 struct NeighbourMapEntry *n;
1068 struct SessionConnectMessage connect_msg;
1069 size_t msg_len;
1070 size_t ret;
1071
1072 GNUNET_assert (neighbours != NULL);
1073 n = lookup_neighbour (peer);
1074 if (NULL == n)
1075 {
1076 if (NULL == session)
1077 GNUNET_ATS_address_destroyed (GST_ats,
1078 peer,
1079 plugin_name, address,
1080 address_len, NULL);
1081 return GNUNET_NO;
1082 }
1083
1084#if DEBUG_TRANSPORT
1085 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1086 "ATS tells us to switch to plugin `%s' address '%s' session %X for %s peer `%s'\n",
1087 plugin_name,
1088 (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
1089 address,
1090 address_len),
1091 session, (is_connected(n) ? "CONNECTED" : "NOT CONNECTED"),
1092 GNUNET_i2s (peer));
1093#endif
1094
1095 GNUNET_free_non_null (n->addr);
1096 n->addr = GNUNET_malloc (address_len);
1097 memcpy (n->addr, address, address_len);
1098 n->bandwidth_in = bandwidth_in;
1099 n->bandwidth_out = bandwidth_out;
1100 n->addrlen = address_len;
1101 n->session = session;
1102 GNUNET_free_non_null (n->plugin_name);
1103 n->plugin_name = GNUNET_strdup (plugin_name);
1104 GNUNET_SCHEDULER_cancel (n->timeout_task);
1105 n->timeout_task =
1106 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1107 &neighbour_timeout_task, n);
1108
1109 if (n->state == S_DISCONNECT)
1110 {
1111 /* We are disconnecting, nothing to do here */
1112 return GNUNET_NO;
1113 }
1114 /* We are not connected/connecting and initiate a fresh connect */
1115 if (n->state == S_NOT_CONNECTED)
1116 {
1117 msg_len = sizeof (struct SessionConnectMessage);
1118 connect_msg.header.size = htons (msg_len);
1119 connect_msg.header.type =
1120 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1121 connect_msg.reserved = htonl (0);
1122 connect_msg.timestamp =
1123 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1124
1125 ret = send_with_plugin (peer, (const char *) &connect_msg, msg_len, 0, GNUNET_TIME_UNIT_FOREVER_REL, session, plugin_name, address, address_len, GNUNET_YES, &send_connect_continuation, n);
1126 if (ret == GNUNET_SYSERR)
1127 {
1128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1129 "Failed to send CONNECT_MESSAGE to `%4s' using plugin `%s' address '%s' session %X\n",
1130 GNUNET_i2s (peer), plugin_name,
1131 (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
1132 address,
1133 address_len),
1134 session);
1135 }
1136 return GNUNET_NO;
1137 }
1138 /* We received a CONNECT message and asked ATS for an address */
1139 else if (n->state == S_CONNECT_RECV)
1140 {
1141 msg_len = sizeof (struct SessionConnectMessage);
1142 connect_msg.header.size = htons (msg_len);
1143 connect_msg.header.type =
1144 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1145 connect_msg.reserved = htonl (0);
1146 connect_msg.timestamp = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1147
1148 ret = send_with_plugin(&n->id, (const void *) &connect_msg, msg_len, 0, GNUNET_TIME_UNIT_FOREVER_REL, session, plugin_name, address, address_len, GNUNET_YES, &send_connect_ack_continuation, n);
1149 if (ret == GNUNET_SYSERR)
1150 {
1151 change_state (n, S_NOT_CONNECTED);
1152 GNUNET_break (0);
1153 }
1154 return GNUNET_NO;
1155 }
1156 /* connected peer is switching addresses */
1157 else if (n->state == S_CONNECTED)
1158 {
1159 msg_len = sizeof (struct SessionConnectMessage);
1160 connect_msg.header.size = htons (msg_len);
1161 connect_msg.header.type =
1162 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1163 connect_msg.reserved = htonl (0);
1164 connect_msg.timestamp =
1165 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1166
1167 ret = send_with_plugin (peer, (const char *) &connect_msg, msg_len, 0, GNUNET_TIME_UNIT_FOREVER_REL, session, plugin_name, address, address_len, GNUNET_YES, &send_switch_address_continuation, n);
1168 if (ret == GNUNET_SYSERR)
1169 {
1170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1171 "Failed to send CONNECT_MESSAGE to `%4s' using plugin `%s' address '%s' session %X\n",
1172 GNUNET_i2s (peer), plugin_name,
1173 (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
1174 address,
1175 address_len),
1176 session);
1177 }
1178 return GNUNET_NO;
1179 }
1180
1181 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid connection state to switch addresses %u ", n->state);
1182 GNUNET_break_op (0);
1183 return GNUNET_NO;
1184}
1185
1186
1187/**
1188 * Create an entry in the neighbour map for the given peer
1189 *
1190 * @param peer peer to create an entry for
1191 * @return new neighbour map entry
1192 */
1193static struct NeighbourMapEntry *
1194setup_neighbour (const struct GNUNET_PeerIdentity *peer)
1195{
1196 struct NeighbourMapEntry *n;
1197
1198#if DEBUG_TRANSPORT
1199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1200 "Unknown peer `%s', creating new neighbour\n",
1201 GNUNET_i2s (peer));
1202#endif
1203 n = GNUNET_malloc (sizeof (struct NeighbourMapEntry));
1204 n->id = *peer;
1205 n->state = S_NOT_CONNECTED;
1206 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
1207 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
1208 MAX_BANDWIDTH_CARRY_S);
1209 n->timeout_task =
1210 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1211 &neighbour_timeout_task, n);
1212 GNUNET_assert (GNUNET_OK ==
1213 GNUNET_CONTAINER_multihashmap_put (neighbours,
1214 &n->id.hashPubKey, n,
1215 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1216 return n;
1217}
1218
1219
1220/**
1221 * Try to create a connection to the given target (eventually).
1222 *
1223 * @param target peer to try to connect to
1224 */
1225void
1226GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
1227{
1228 struct NeighbourMapEntry *n;
1229
1230 GNUNET_assert (neighbours != NULL);
1231#if DEBUG_TRANSPORT
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Trying to connect to peer `%s'\n",
1233 GNUNET_i2s (target));
1234#endif
1235 GNUNET_assert (0 !=
1236 memcmp (target, &GST_my_identity,
1237 sizeof (struct GNUNET_PeerIdentity)));
1238 n = lookup_neighbour (target);
1239
1240 if (NULL != n)
1241 {
1242 if ((is_connected(n)) || (is_connecting(n)))
1243 return; /* already connecting or connected */
1244 if (is_disconnecting(n))
1245 change_state (n, S_NOT_CONNECTED);
1246 }
1247
1248
1249 if (n == NULL)
1250 n = setup_neighbour (target);
1251#if DEBUG_TRANSPORT
1252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1253 "Asking ATS for suggested address to connect to peer `%s'\n",
1254 GNUNET_i2s (&n->id));
1255#endif
1256 GNUNET_ATS_suggest_address (GST_ats, &n->id);
1257}
1258
1259
1260/**
1261 * Test if we're connected to the given peer.
1262 *
1263 * @param target peer to test
1264 * @return GNUNET_YES if we are connected, GNUNET_NO if not
1265 */
1266int
1267GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
1268{
1269 struct NeighbourMapEntry *n;
1270
1271 GNUNET_assert (neighbours != NULL);
1272
1273 n = lookup_neighbour (target);
1274
1275 if ((NULL == n) || (!is_connected(n)))
1276 return GNUNET_NO; /* not connected */
1277 return GNUNET_YES;
1278}
1279
1280
1281/**
1282 * A session was terminated. Take note.
1283 *
1284 * @param peer identity of the peer where the session died
1285 * @param session session that is gone
1286 */
1287void
1288GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
1289 struct Session *session)
1290{
1291 struct NeighbourMapEntry *n;
1292
1293 GNUNET_assert (neighbours != NULL);
1294
1295#if DEBUG_TRANSPORT
1296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1297 "Session %X to peer `%s' ended \n",
1298 session, GNUNET_i2s (peer));
1299#endif
1300
1301 n = lookup_neighbour (peer);
1302 if (NULL == n)
1303 return;
1304 if (session != n->session)
1305 return; /* doesn't affect us */
1306
1307 n->session = NULL;
1308 GNUNET_free (n->addr);
1309 n->addr = NULL;
1310 n->addrlen = 0;
1311
1312 /* not connected anymore anyway, shouldn't matter */
1313 if ((!is_connected(n)) && (!is_connecting(n)))
1314 return;
1315
1316 // FIXME: switch address what is the state
1317 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Do not forget to fix this!\n");
1318
1319 /* We are connected, so ask ATS to switch addresses */
1320 GNUNET_SCHEDULER_cancel (n->timeout_task);
1321 n->timeout_task =
1322 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_DISCONNECT_SESSION_TIMEOUT,
1323 &neighbour_timeout_task, n);
1324 /* try QUICKLY to re-establish a connection, reduce timeout! */
1325 GNUNET_ATS_suggest_address (GST_ats, peer);
1326}
1327
1328
1329/**
1330 * Transmit a message to the given target using the active connection.
1331 *
1332 * @param target destination
1333 * @param msg message to send
1334 * @param msg_size number of bytes in msg
1335 * @param timeout when to fail with timeout
1336 * @param cont function to call when done
1337 * @param cont_cls closure for 'cont'
1338 */
1339void
1340GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1341 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1342 GST_NeighbourSendContinuation cont, void *cont_cls)
1343{
1344 struct NeighbourMapEntry *n;
1345 struct MessageQueue *mq;
1346
1347 GNUNET_assert (neighbours != NULL);
1348
1349 n = lookup_neighbour (target);
1350 if ((n == NULL) || (!is_connected(n)))
1351 {
1352 GNUNET_STATISTICS_update (GST_stats,
1353 gettext_noop
1354 ("# messages not sent (no such peer or not connected)"),
1355 1, GNUNET_NO);
1356#if DEBUG_TRANSPORT
1357 if (n == NULL)
1358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1359 "Could not send message to peer `%s': unknown neighbour",
1360 GNUNET_i2s (target));
1361 else if (!is_connected(n))
1362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1363 "Could not send message to peer `%s': not connected\n",
1364 GNUNET_i2s (target));
1365#endif
1366 if (NULL != cont)
1367 cont (cont_cls, GNUNET_SYSERR);
1368 return;
1369 }
1370
1371 if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen ==0))
1372 {
1373 GNUNET_STATISTICS_update (GST_stats,
1374 gettext_noop
1375 ("# messages not sent (no such peer or not connected)"),
1376 1, GNUNET_NO);
1377#if DEBUG_TRANSPORT
1378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1379 "Could not send message to peer `%s': no address available\n",
1380 GNUNET_i2s (target));
1381#endif
1382
1383 if (NULL != cont)
1384 cont (cont_cls, GNUNET_SYSERR);
1385 return;
1386 }
1387
1388 GNUNET_assert (msg_size >= sizeof (struct GNUNET_MessageHeader));
1389 GNUNET_STATISTICS_update (GST_stats,
1390 gettext_noop
1391 ("# bytes in message queue for other peers"),
1392 msg_size, GNUNET_NO);
1393 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1394 mq->cont = cont;
1395 mq->cont_cls = cont_cls;
1396 /* FIXME: this memcpy can be up to 7% of our total runtime! */
1397 memcpy (&mq[1], msg, msg_size);
1398 mq->message_buf = (const char *) &mq[1];
1399 mq->message_buf_size = msg_size;
1400 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1401 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1402
1403 if ((GNUNET_SCHEDULER_NO_TASK == n->transmission_task) &&
1404 (NULL == n->is_active))
1405 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
1406}
1407
1408
1409/**
1410 * We have received a message from the given sender. How long should
1411 * we delay before receiving more? (Also used to keep the peer marked
1412 * as live).
1413 *
1414 * @param sender sender of the message
1415 * @param size size of the message
1416 * @param do_forward set to GNUNET_YES if the message should be forwarded to clients
1417 * GNUNET_NO if the neighbour is not connected or violates the quota,
1418 * GNUNET_SYSERR if the connection is not fully up yet
1419 * @return how long to wait before reading more from this sender
1420 */
1421struct GNUNET_TIME_Relative
1422GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1423 *sender, ssize_t size, int *do_forward)
1424{
1425 struct NeighbourMapEntry *n;
1426 struct GNUNET_TIME_Relative ret;
1427
1428 GNUNET_assert (neighbours != NULL);
1429
1430 n = lookup_neighbour (sender);
1431 if (n == NULL)
1432 {
1433 GST_neighbours_try_connect (sender);
1434 n = lookup_neighbour (sender);
1435 if (NULL == n)
1436 {
1437 GNUNET_STATISTICS_update (GST_stats,
1438 gettext_noop
1439 ("# messages discarded due to lack of neighbour record"),
1440 1, GNUNET_NO);
1441 *do_forward = GNUNET_NO;
1442 return GNUNET_TIME_UNIT_ZERO;
1443 }
1444 }
1445 if (!is_connected(n))
1446 {
1447 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1448 _("Plugin gave us %d bytes of data but somehow the session is not marked as UP yet!\n"),
1449 (int) size);
1450 *do_forward = GNUNET_SYSERR;
1451 return GNUNET_TIME_UNIT_ZERO;
1452 }
1453 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1454 {
1455 n->quota_violation_count++;
1456#if DEBUG_TRANSPORT
1457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1458 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1459 n->in_tracker.available_bytes_per_s__,
1460 n->quota_violation_count);
1461#endif
1462 /* Discount 32k per violation */
1463 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1464 }
1465 else
1466 {
1467 if (n->quota_violation_count > 0)
1468 {
1469 /* try to add 32k back */
1470 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1471 n->quota_violation_count--;
1472 }
1473 }
1474 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1475 {
1476 GNUNET_STATISTICS_update (GST_stats,
1477 gettext_noop
1478 ("# bandwidth quota violations by other peers"),
1479 1, GNUNET_NO);
1480 *do_forward = GNUNET_NO;
1481 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1482 }
1483 *do_forward = GNUNET_YES;
1484 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1485 if (ret.rel_value > 0)
1486 {
1487#if DEBUG_TRANSPORT
1488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1489 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
1490 (unsigned long long) n->in_tracker.
1491 consumption_since_last_update__,
1492 (unsigned int) n->in_tracker.available_bytes_per_s__,
1493 (unsigned long long) ret.rel_value);
1494#endif
1495 GNUNET_STATISTICS_update (GST_stats,
1496 gettext_noop ("# ms throttling suggested"),
1497 (int64_t) ret.rel_value, GNUNET_NO);
1498 }
1499 return ret;
1500}
1501
1502
1503/**
1504 * Keep the connection to the given neighbour alive longer,
1505 * we received a KEEPALIVE (or equivalent).
1506 *
1507 * @param neighbour neighbour to keep alive
1508 */
1509void
1510GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour)
1511{
1512 struct NeighbourMapEntry *n;
1513
1514 GNUNET_assert (neighbours != NULL);
1515
1516 n = lookup_neighbour (neighbour);
1517 if (NULL == n)
1518 {
1519 GNUNET_STATISTICS_update (GST_stats,
1520 gettext_noop
1521 ("# KEEPALIVE messages discarded (not connected)"),
1522 1, GNUNET_NO);
1523 return;
1524 }
1525 GNUNET_SCHEDULER_cancel (n->timeout_task);
1526 n->timeout_task =
1527 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1528 &neighbour_timeout_task, n);
1529}
1530
1531
1532/**
1533 * Change the incoming quota for the given peer.
1534 *
1535 * @param neighbour identity of peer to change qutoa for
1536 * @param quota new quota
1537 */
1538void
1539GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
1540 struct GNUNET_BANDWIDTH_Value32NBO quota)
1541{
1542 struct NeighbourMapEntry *n;
1543
1544 GNUNET_assert (neighbours != NULL);
1545
1546 n = lookup_neighbour (neighbour);
1547 if (n == NULL)
1548 {
1549 GNUNET_STATISTICS_update (GST_stats,
1550 gettext_noop
1551 ("# SET QUOTA messages ignored (no such peer)"),
1552 1, GNUNET_NO);
1553 return;
1554 }
1555 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
1556 if (0 != ntohl (quota.value__))
1557 return;
1558#if DEBUG_TRANSPORT
1559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s' due to `%s'\n",
1560 GNUNET_i2s (&n->id), "SET_QUOTA");
1561#endif
1562 if (is_connected(n))
1563 GNUNET_STATISTICS_update (GST_stats,
1564 gettext_noop ("# disconnects due to quota of 0"), 1,
1565 GNUNET_NO);
1566 disconnect_neighbour (n);
1567}
1568
1569
1570/**
1571 * Closure for the neighbours_iterate function.
1572 */
1573struct IteratorContext
1574{
1575 /**
1576 * Function to call on each connected neighbour.
1577 */
1578 GST_NeighbourIterator cb;
1579
1580 /**
1581 * Closure for 'cb'.
1582 */
1583 void *cb_cls;
1584};
1585
1586
1587/**
1588 * Call the callback from the closure for each connected neighbour.
1589 *
1590 * @param cls the 'struct IteratorContext'
1591 * @param key the hash of the public key of the neighbour
1592 * @param value the 'struct NeighbourMapEntry'
1593 * @return GNUNET_OK (continue to iterate)
1594 */
1595static int
1596neighbours_iterate (void *cls, const GNUNET_HashCode * key, void *value)
1597{
1598 struct IteratorContext *ic = cls;
1599 struct NeighbourMapEntry *n = value;
1600
1601 if (is_connected(n))
1602 return GNUNET_OK;
1603
1604 ic->cb (ic->cb_cls, &n->id, NULL, 0, n->plugin_name, n->addr, n->addrlen);
1605 return GNUNET_OK;
1606}
1607
1608
1609/**
1610 * Iterate over all connected neighbours.
1611 *
1612 * @param cb function to call
1613 * @param cb_cls closure for cb
1614 */
1615void
1616GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
1617{
1618 struct IteratorContext ic;
1619
1620 GNUNET_assert (neighbours != NULL);
1621
1622 ic.cb = cb;
1623 ic.cb_cls = cb_cls;
1624 GNUNET_CONTAINER_multihashmap_iterate (neighbours, &neighbours_iterate, &ic);
1625}
1626
1627/**
1628 * If we have an active connection to the given target, it must be shutdown.
1629 *
1630 * @param target peer to disconnect from
1631 */
1632void
1633GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
1634{
1635 struct NeighbourMapEntry *n;
1636
1637 GNUNET_assert (neighbours != NULL);
1638
1639 n = lookup_neighbour (target);
1640 if (NULL == n)
1641 return; /* not active */
1642 if (is_connected(n))
1643 {
1644 send_disconnect(n);
1645
1646 n = lookup_neighbour (target);
1647 if (NULL == n)
1648 return; /* gone already */
1649 }
1650 disconnect_neighbour (n);
1651}
1652
1653
1654/**
1655 * We received a disconnect message from the given peer,
1656 * validate and process.
1657 *
1658 * @param peer sender of the message
1659 * @param msg the disconnect message
1660 */
1661void
1662GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
1663 const struct GNUNET_MessageHeader *msg)
1664{
1665 struct NeighbourMapEntry *n;
1666 const struct SessionDisconnectMessage *sdm;
1667 GNUNET_HashCode hc;
1668
1669#if DEBUG_TRANSPORT
1670 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1671 "Received DISCONNECT message from peer `%s'\n", GNUNET_i2s (peer));
1672#endif
1673
1674 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
1675 {
1676 // GNUNET_break_op (0);
1677 GNUNET_STATISTICS_update (GST_stats,
1678 gettext_noop ("# disconnect messages ignored (old format)"), 1,
1679 GNUNET_NO);
1680 return;
1681 }
1682 sdm = (const struct SessionDisconnectMessage* ) msg;
1683 n = lookup_neighbour (peer);
1684 if (NULL == n)
1685 return; /* gone already */
1686 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value <=
1687 n->connect_ts.abs_value)
1688 {
1689 GNUNET_STATISTICS_update (GST_stats,
1690 gettext_noop ("# disconnect messages ignored (timestamp)"), 1,
1691 GNUNET_NO);
1692 return;
1693 }
1694 GNUNET_CRYPTO_hash (&sdm->public_key,
1695 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1696 &hc);
1697 if (0 != memcmp (peer,
1698 &hc,
1699 sizeof (struct GNUNET_PeerIdentity)))
1700 {
1701 GNUNET_break_op (0);
1702 return;
1703 }
1704 if (ntohl (sdm->purpose.size) !=
1705 sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
1706 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
1707 sizeof (struct GNUNET_TIME_AbsoluteNBO))
1708 {
1709 GNUNET_break_op (0);
1710 return;
1711 }
1712 if (GNUNET_OK !=
1713 GNUNET_CRYPTO_rsa_verify (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT,
1714 &sdm->purpose,
1715 &sdm->signature,
1716 &sdm->public_key))
1717 {
1718 GNUNET_break_op (0);
1719 return;
1720 }
1721 GST_neighbours_force_disconnect (peer);
1722}
1723
1724/**
1725 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
1726 * Consider switching to it.
1727 *
1728 * @param message possibly a 'struct SessionConnectMessage' (check format)
1729 * @param peer identity of the peer to switch the address for
1730 * @param plugin_name name of transport that delivered the PONG
1731 * @param address address of the other peer, NULL if other peer
1732 * connected to us
1733 * @param address_len number of bytes in address
1734 * @param session session to use (or NULL)
1735 * @param ats performance data
1736 * @param ats_count number of entries in ats
1737 */
1738void
1739GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
1740 const struct GNUNET_PeerIdentity *peer,
1741 const char *plugin_name,
1742 const char *sender_address, uint16_t sender_address_len,
1743 struct Session *session,
1744 const struct GNUNET_ATS_Information *ats,
1745 uint32_t ats_count)
1746{
1747 const struct SessionConnectMessage *scm;
1748 struct QuotaSetMessage q_msg;
1749 struct GNUNET_MessageHeader msg;
1750 struct GNUNET_TIME_Absolute ts;
1751 struct NeighbourMapEntry *n;
1752 size_t msg_len;
1753 size_t ret;
1754
1755#if DEBUG_TRANSPORT
1756#endif
1757 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1758 "Received CONNECT_ACK message from peer `%s'\n", GNUNET_i2s (peer));
1759
1760
1761 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
1762 {
1763 GNUNET_break_op (0);
1764 return;
1765 }
1766
1767 scm = (const struct SessionConnectMessage *) message;
1768 GNUNET_break_op (ntohl (scm->reserved) == 0);
1769 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
1770 n = lookup_neighbour (peer);
1771 if (NULL == n)
1772 n = setup_neighbour (peer);
1773/*
1774 if (n->state != S_CONNECT_SENT)
1775 {
1776 GNUNET_break (0);
1777 send_disconnect(n);
1778 return;
1779 }
1780*/
1781 if (NULL != session)
1782 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1783 "transport-ats",
1784 "Giving ATS session %p of plugin %s for peer %s\n",
1785 session,
1786 plugin_name,
1787 GNUNET_i2s (peer));
1788 GNUNET_ATS_address_update (GST_ats,
1789 peer,
1790 plugin_name, sender_address, sender_address_len,
1791 session, ats, ats_count);
1792
1793 change_state (n, S_CONNECTED);
1794
1795#if DEBUG_TRANSPORT
1796 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1797 "Setting inbound quota of %u for peer `%s' to \n",
1798 ntohl (n->bandwidth_in.value__), GNUNET_i2s (&n->id));
1799#endif
1800 GST_neighbours_set_incoming_quota(&n->id, n->bandwidth_in);
1801
1802 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
1803 &neighbour_keepalive_task,
1804 n);
1805 /* send ACK (ACK)*/
1806 msg_len = sizeof (msg);
1807 msg.size = htons (msg_len);
1808 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
1809
1810 ret = send_with_plugin (&n->id, (const char *) &msg, msg_len, 0,
1811 GNUNET_TIME_UNIT_FOREVER_REL,
1812 n->session, n->plugin_name, n->addr, n->addrlen,
1813 GNUNET_YES, NULL, NULL);
1814
1815 if (ret == GNUNET_SYSERR)
1816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1817 "Failed to send SESSION_ACK to `%4s' using plugin `%s' address '%s' session %X\n",
1818 GNUNET_i2s (&n->id), n->plugin_name,
1819 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1820 n->addr,
1821 n->addrlen),
1822 n->session);
1823
1824 neighbours_connected++;
1825 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
1826 GNUNET_NO);
1827 connect_notify_cb (callback_cls, &n->id, ats, ats_count);
1828
1829#if DEBUG_TRANSPORT
1830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1831 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
1832 ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
1833#endif
1834 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
1835 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
1836 q_msg.quota = n->bandwidth_out;
1837 q_msg.peer = (*peer);
1838 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
1839}
1840
1841void
1842GST_neighbours_handle_ack (const struct GNUNET_MessageHeader *message,
1843 const struct GNUNET_PeerIdentity *peer,
1844 const char *plugin_name,
1845 const char *sender_address, uint16_t sender_address_len,
1846 struct Session *session,
1847 const struct GNUNET_ATS_Information *ats,
1848 uint32_t ats_count)
1849{
1850 struct NeighbourMapEntry *n;
1851 struct QuotaSetMessage q_msg;
1852
1853#if DEBUG_TRANSPORT
1854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1855 "Received ACK message from peer `%s'\n", GNUNET_i2s (peer));
1856#endif
1857
1858 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
1859 {
1860 GNUNET_break_op (0);
1861 return;
1862 }
1863
1864 n = lookup_neighbour (peer);
1865 if (NULL == n)
1866 {
1867 send_disconnect(n);
1868 GNUNET_break (0);
1869 }
1870// FIXME check this
1871// if (n->state != S_CONNECT_RECV)
1872 if (is_connecting(n))
1873 {
1874 send_disconnect (n);
1875 change_state (n, S_DISCONNECT);
1876 GNUNET_break (0);
1877 return;
1878 }
1879
1880 if (is_connected(n))
1881 return;
1882
1883 if (NULL != session)
1884 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1885 "transport-ats",
1886 "Giving ATS session %p of plugin %s for peer %s\n",
1887 session,
1888 plugin_name,
1889 GNUNET_i2s (peer));
1890 GNUNET_ATS_address_update (GST_ats,
1891 peer,
1892 plugin_name, sender_address, sender_address_len,
1893 session, ats, ats_count);
1894
1895 change_state (n, S_CONNECTED);
1896
1897 GST_neighbours_set_incoming_quota(&n->id, n->bandwidth_in);
1898
1899 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
1900 &neighbour_keepalive_task,
1901 n);
1902
1903 neighbours_connected++;
1904 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
1905 GNUNET_NO);
1906 connect_notify_cb (callback_cls, &n->id, ats, ats_count);
1907
1908#if DEBUG_TRANSPORT
1909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1910 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
1911 ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
1912#endif
1913
1914 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
1915 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
1916 q_msg.quota = n->bandwidth_out;
1917 q_msg.peer = (*peer);
1918 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
1919}
1920
1921struct BlackListCheckContext
1922{
1923 struct GNUNET_ATS_Information *ats;
1924
1925 uint32_t ats_count;
1926
1927 struct Session *session;
1928
1929 char *sender_address;
1930
1931 uint16_t sender_address_len;
1932
1933 char *plugin_name;
1934
1935 struct GNUNET_TIME_Absolute ts;
1936};
1937
1938
1939static void
1940handle_connect_blacklist_cont (void *cls,
1941 const struct GNUNET_PeerIdentity
1942 * peer, int result)
1943{
1944 struct NeighbourMapEntry *n;
1945 struct BlackListCheckContext * bcc = cls;
1946
1947#if DEBUG_TRANSPORT
1948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1949 "Blacklist check due to CONNECT message: `%s'\n", GNUNET_i2s (peer), (result == GNUNET_OK) ? "ALLOWED" : "FORBIDDEN");
1950#endif
1951
1952 /* not allowed */
1953 if (GNUNET_OK != result)
1954 {
1955 GNUNET_free (bcc);
1956 return;
1957 }
1958
1959 n = lookup_neighbour (peer);
1960 if (NULL == n)
1961 n = setup_neighbour (peer);
1962
1963 if (bcc->ts.abs_value > n->connect_ts.abs_value)
1964 {
1965 if (NULL != bcc->session)
1966 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1967 "transport-ats",
1968 "Giving ATS session %p of plugin %s address `%s' for peer %s\n",
1969 bcc->session,
1970 bcc->plugin_name,
1971 GST_plugins_a2s (bcc->plugin_name, bcc->sender_address, bcc->sender_address_len),
1972 GNUNET_i2s (peer));
1973 GNUNET_ATS_address_update (GST_ats,
1974 peer,
1975 bcc->plugin_name, bcc->sender_address, bcc->sender_address_len,
1976 bcc->session, bcc->ats, bcc->ats_count);
1977 n->connect_ts = bcc->ts;
1978 }
1979
1980 GNUNET_free (bcc);
1981 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1982 "Blacklist check due to CONNECT message: `%s'\n");
1983/*
1984 if (n->state != S_NOT_CONNECTED)
1985 return;*/
1986 change_state (n, S_CONNECT_RECV);
1987
1988 /* Ask ATS for an address to connect via that address */
1989 GNUNET_ATS_suggest_address(GST_ats, peer);
1990}
1991
1992/**
1993 * We received a 'SESSION_CONNECT' message from the other peer.
1994 * Consider switching to it.
1995 *
1996 * @param message possibly a 'struct SessionConnectMessage' (check format)
1997 * @param peer identity of the peer to switch the address for
1998 * @param plugin_name name of transport that delivered the PONG
1999 * @param address address of the other peer, NULL if other peer
2000 * connected to us
2001 * @param address_len number of bytes in address
2002 * @param session session to use (or NULL)
2003 * @param ats performance data
2004 * @param ats_count number of entries in ats (excluding 0-termination)
2005 */
2006void
2007GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2008 const struct GNUNET_PeerIdentity *peer,
2009 const char *plugin_name,
2010 const char *sender_address, uint16_t sender_address_len,
2011 struct Session *session,
2012 const struct GNUNET_ATS_Information *ats,
2013 uint32_t ats_count)
2014{
2015 const struct SessionConnectMessage *scm;
2016 struct NeighbourMapEntry * n;
2017 struct BlackListCheckContext * bcc = NULL;
2018
2019#if DEBUG_TRANSPORT
2020#endif
2021 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2022 "Received CONNECT message from peer `%s'\n", GNUNET_i2s (peer));
2023
2024
2025 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2026 {
2027 GNUNET_break_op (0);
2028 return;
2029 }
2030
2031 scm = (const struct SessionConnectMessage *) message;
2032 GNUNET_break_op (ntohl (scm->reserved) == 0);
2033
2034 n = lookup_neighbour(peer);
2035 if (n != NULL)
2036 {
2037 /* connected peer switches addresses */
2038 if (is_connected(n))
2039 {
2040 GNUNET_ATS_address_update(GST_ats, peer, plugin_name, sender_address, sender_address_len, session, ats, ats_count);
2041 return;
2042 }
2043 }
2044
2045 /* we are not connected to this peer */
2046 /* do blacklist check*/
2047 bcc = GNUNET_malloc (sizeof (struct BlackListCheckContext) +
2048 sizeof (struct GNUNET_ATS_Information) * ats_count +
2049 sender_address_len +
2050 strlen (plugin_name)+1);
2051
2052 bcc->ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2053
2054 bcc->ats_count = ats_count;
2055 bcc->sender_address_len = sender_address_len;
2056 bcc->session = session;
2057
2058 bcc->ats = (struct GNUNET_ATS_Information *) &bcc[1];
2059 memcpy (bcc->ats, ats,sizeof (struct GNUNET_ATS_Information) * ats_count );
2060
2061 bcc->sender_address = (char *) &bcc->ats[ats_count];
2062 memcpy (bcc->sender_address, sender_address , sender_address_len);
2063
2064 bcc->plugin_name = &bcc->sender_address[sender_address_len];
2065 strcpy (bcc->plugin_name, plugin_name);
2066
2067 GST_blacklist_test_allowed (peer, plugin_name, handle_connect_blacklist_cont, bcc);
2068}
2069
2070
2071/* end of file gnunet-service-transport_neighbours.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-30 17:36:30 +0000