2 This file is part of GNUnet.
3 (C) 2010,2011 Christian Grothoff (and other contributing authors)
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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
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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22 * @file transport/gnunet-service-transport_neighbours.c
23 * @brief neighbour management
24 * @author Christian Grothoff
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"
40 * Size of the neighbour hash map.
42 #define NEIGHBOUR_TABLE_SIZE 256
45 * How often must a peer violate bandwidth quotas before we start
46 * to simply drop its messages?
48 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
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).
56 #define KEEPALIVE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 90)
59 #define ATS_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
62 #define SETUP_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
66 * Entry in neighbours.
68 struct NeighbourMapEntry;
71 * Message a peer sends to another to indicate its
72 * preference for communicating via a particular
73 * session (and the desire to establish a real
76 struct SessionConnectMessage
79 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT'
81 struct GNUNET_MessageHeader header;
86 uint32_t reserved GNUNET_PACKED;
89 * Absolute time at the sender. Only the most recent connect
90 * message implies which session is preferred by the sender.
92 struct GNUNET_TIME_AbsoluteNBO timestamp;
97 struct SessionDisconnectMessage
100 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT'
102 struct GNUNET_MessageHeader header;
107 uint32_t reserved GNUNET_PACKED;
110 * Purpose of the signature. Extends over the timestamp.
111 * Purpose should be GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
113 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
116 * Absolute time at the sender. Only the most recent connect
117 * message implies which session is preferred by the sender.
119 struct GNUNET_TIME_AbsoluteNBO timestamp;
122 * Public key of the sender.
124 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
127 * Signature of the peer that sends us the disconnect. Only
128 * valid if the timestamp is AFTER the timestamp from the
129 * corresponding 'CONNECT' message.
131 struct GNUNET_CRYPTO_RsaSignature signature;
137 * For each neighbour we keep a list of messages
138 * that we still want to transmit to the neighbour.
144 * This is a doubly linked list.
146 struct MessageQueue *next;
149 * This is a doubly linked list.
151 struct MessageQueue *prev;
154 * Once this message is actively being transmitted, which
155 * neighbour is it associated with?
157 struct NeighbourMapEntry *n;
160 * Function to call once we're done.
162 GST_NeighbourSendContinuation cont;
170 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
171 * stuck together in memory. Allocated at the end of this struct.
173 const char *message_buf;
176 * Size of the message buf
178 size_t message_buf_size;
181 * At what time should we fail?
183 struct GNUNET_TIME_Absolute timeout;
189 /* fresh peer or completely disconnected */
191 /* sent CONNECT message to other peer, waiting for CONNECT_ACK */
193 /* received CONNECT message to other peer, sending CONNECT_ACK */
195 /* sent CONNECT_ACK message to other peer, wait for ACK or payload */
196 S_CONNECT_RECV_ACK_SENT = 8,
197 /* received ACK or payload */
199 /* Disconnect in progress */
204 * Entry in neighbours.
206 struct NeighbourMapEntry
210 * Head of list of messages we would like to send to this peer;
211 * must contain at most one message per client.
213 struct MessageQueue *messages_head;
216 * Tail of list of messages we would like to send to this peer; must
217 * contain at most one message per client.
219 struct MessageQueue *messages_tail;
222 * Performance data for the peer.
224 //struct GNUNET_ATS_Information *ats;
227 * Are we currently trying to send a message? If so, which one?
229 struct MessageQueue *is_active;
232 * Active session for communicating with the peer.
234 struct Session *session;
237 * Name of the plugin we currently use.
242 * Address used for communicating with the peer, NULL for inbound connections.
247 * Number of bytes in 'addr'.
252 * Identity of this neighbour.
254 struct GNUNET_PeerIdentity id;
257 * ID of task scheduled to run when this peer is about to
258 * time out (will free resources associated with the peer).
260 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
263 * ID of task scheduled to send keepalives.
265 GNUNET_SCHEDULER_TaskIdentifier keepalive_task;
268 * ID of task scheduled to run when we should try transmitting
269 * the head of the message queue.
271 GNUNET_SCHEDULER_TaskIdentifier transmission_task;
274 * Tracker for inbound bandwidth.
276 struct GNUNET_BANDWIDTH_Tracker in_tracker;
279 * Inbound bandwidth from ATS, activated when connection is up
281 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
284 * Inbound bandwidth from ATS, activated when connection is up
286 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
289 * Timestamp of the 'SESSION_CONNECT' message we got from the other peer
291 struct GNUNET_TIME_Absolute connect_ts;
295 * We asked ATS for a new address for this peer
297 GNUNET_SCHEDULER_TaskIdentifier ats_suggest;
300 * Task the resets the peer state after due to an pending
301 * unsuccessful connection setup
303 GNUNET_SCHEDULER_TaskIdentifier state_reset;
306 * How often has the other peer (recently) violated the inbound
307 * traffic limit? Incremented by 10 per violation, decremented by 1
308 * per non-violation (for each time interval).
310 unsigned int quota_violation_count;
314 * The current state of the peer
315 * Element of enum State
323 * All known neighbours and their HELLOs.
325 static struct GNUNET_CONTAINER_MultiHashMap *neighbours;
328 * Closure for connect_notify_cb and disconnect_notify_cb
330 static void *callback_cls;
333 * Function to call when we connected to a neighbour.
335 static GNUNET_TRANSPORT_NotifyConnect connect_notify_cb;
338 * Function to call when we disconnected from a neighbour.
340 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
343 * counter for connected neighbours
345 static int neighbours_connected;
348 * Lookup a neighbour entry in the neighbours hash map.
350 * @param pid identity of the peer to look up
351 * @return the entry, NULL if there is no existing record
353 static struct NeighbourMapEntry *
354 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
356 return GNUNET_CONTAINER_multihashmap_get (neighbours, &pid->hashPubKey);
359 #define change_state(n, state, ...) change (n, state, __LINE__)
362 is_connecting (struct NeighbourMapEntry * n)
364 if ((n->state > S_NOT_CONNECTED) && (n->state < S_CONNECTED))
370 is_connected (struct NeighbourMapEntry * n)
372 if (n->state == S_CONNECTED)
378 is_disconnecting (struct NeighbourMapEntry * n)
380 if (n->state == S_DISCONNECT)
386 print_state (int state)
390 return "S_CONNECTED";
393 return "S_CONNECT_RECV";
395 case S_CONNECT_RECV_ACK_SENT:
396 return"S_CONNECT_RECV_ACK_SENT";
399 return "S_CONNECT_SENT";
402 return "S_DISCONNECT";
404 case S_NOT_CONNECTED:
405 return "S_NOT_CONNECTED";
415 change (struct NeighbourMapEntry * n, int state, int line);
418 ats_suggest_cancel (void *cls,
419 const struct GNUNET_SCHEDULER_TaskContext *tc);
422 reset_task (void *cls,
423 const struct GNUNET_SCHEDULER_TaskContext *tc)
425 struct NeighbourMapEntry * n = cls;
427 n->state_reset = GNUNET_SCHEDULER_NO_TASK;
430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
431 "Connection to peer `%s' %s failed in state `%s', resetting connection attempt \n",
432 GNUNET_i2s (&n->id), GST_plugins_a2s(n->plugin_name, n->addr, n->addrlen), print_state(n->state));
434 GNUNET_STATISTICS_update (GST_stats,
435 gettext_noop ("# failed connection attempts due to timeout"),
439 /* resetting state */
440 n->state = S_NOT_CONNECTED;
442 /* destroying address */
443 GNUNET_ATS_address_destroyed (GST_ats,
450 /* request new address */
451 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
452 GNUNET_SCHEDULER_cancel(n->ats_suggest);
453 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
454 GNUNET_ATS_suggest_address(GST_ats, &n->id);
458 change (struct NeighbourMapEntry * n, int state, int line)
460 char * old = strdup(print_state(n->state));
461 char * new = strdup(print_state(state));
463 /* allowed transitions */
464 int allowed = GNUNET_NO;
466 case S_NOT_CONNECTED:
467 if ((state == S_CONNECT_RECV) || (state == S_CONNECT_SENT) ||
468 (state == S_DISCONNECT))
470 allowed = GNUNET_YES;
472 /* Schedule reset task */
473 if ((state == S_CONNECT_RECV) || (state == S_CONNECT_SENT) )
475 GNUNET_assert (n->state_reset == GNUNET_SCHEDULER_NO_TASK);
476 n->state_reset = GNUNET_SCHEDULER_add_delayed (SETUP_CONNECTION_TIMEOUT, &reset_task, n);
483 if ((state == S_NOT_CONNECTED) || (state == S_DISCONNECT) ||
484 (state == S_CONNECTED) || /* FIXME SENT -> RECV ISSUE!*/ (state == S_CONNECT_SENT))
486 if ((state == S_CONNECTED) || (state == S_DISCONNECT) || (state == S_NOT_CONNECTED))
489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
490 "Removed reset task for peer `%s' %s failed in state transition `%s' -> `%s' \n",
491 GNUNET_i2s (&n->id), GST_plugins_a2s(n->plugin_name, n->addr, n->addrlen), print_state(n->state), print_state(state));
493 GNUNET_assert (n->state_reset != GNUNET_SCHEDULER_NO_TASK);
494 GNUNET_SCHEDULER_cancel (n->state_reset);
495 n->state_reset = GNUNET_SCHEDULER_NO_TASK;
498 allowed = GNUNET_YES;
503 if ((state == S_NOT_CONNECTED) || (state == S_CONNECTED) ||
504 (state == S_DISCONNECT) || /* FIXME SENT -> RECV ISSUE!*/ (state == S_CONNECT_RECV))
506 if ((state == S_CONNECTED) || (state == S_DISCONNECT) || (state == S_NOT_CONNECTED))
509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
510 "Removed reset task for peer `%s' %s failed in state transition `%s' -> `%s' \n",
511 GNUNET_i2s (&n->id), GST_plugins_a2s(n->plugin_name, n->addr, n->addrlen), print_state(n->state), print_state(state));
513 GNUNET_assert (n->state_reset != GNUNET_SCHEDULER_NO_TASK);
514 GNUNET_SCHEDULER_cancel (n->state_reset);
515 n->state_reset = GNUNET_SCHEDULER_NO_TASK;
518 allowed = GNUNET_YES;
523 if (state == S_DISCONNECT)
525 allowed = GNUNET_YES;
531 if (state == S_NOT_CONNECTED)
533 allowed = GNUNET_YES;
543 if (allowed == GNUNET_NO)
545 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
546 "Illegal state transition from `%s' to `%s' in line %u \n",
551 return GNUNET_SYSERR;
556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "State for neighbour `%s' %X changed from `%s' to `%s' in line %u\n",
557 GNUNET_i2s (&n->id), n, old, new, line);
565 send_with_plugin ( const struct GNUNET_PeerIdentity * target,
569 struct GNUNET_TIME_Relative timeout,
570 struct Session * session,
571 const char * plugin_name,
575 GNUNET_TRANSPORT_TransmitContinuation cont,
579 struct GNUNET_TRANSPORT_PluginFunctions *papi;
580 size_t ret = GNUNET_SYSERR;
582 papi = GST_plugins_find (plugin_name);
586 cont (cont_cls, target, GNUNET_SYSERR);
587 return GNUNET_SYSERR;
590 ret = papi->send (papi->cls,
603 cont (cont_cls, target, GNUNET_SYSERR);
609 * Task invoked to start a transmission to another peer.
611 * @param cls the 'struct NeighbourMapEntry'
612 * @param tc scheduler context
615 transmission_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
619 * We're done with our transmission attempt, continue processing.
621 * @param cls the 'struct MessageQueue' of the message
622 * @param receiver intended receiver
623 * @param success whether it worked or not
626 transmit_send_continuation (void *cls,
627 const struct GNUNET_PeerIdentity *receiver,
630 struct MessageQueue *mq;
631 struct NeighbourMapEntry *n;
637 GNUNET_assert (n->is_active == mq);
639 if (success == GNUNET_YES)
641 GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
642 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending message of type %u was %s\n",
647 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
648 (success == GNUNET_OK) ? "successful" : "FAILED");
650 if (NULL != mq->cont)
651 mq->cont (mq->cont_cls, success);
657 * Check the ready list for the given neighbour and if a plugin is
658 * ready for transmission (and if we have a message), do so!
660 * @param n target peer for which to transmit
663 try_transmission_to_peer (struct NeighbourMapEntry *n)
665 struct MessageQueue *mq;
666 struct GNUNET_TIME_Relative timeout;
669 if (n->is_active != NULL)
672 return; /* transmission already pending */
674 if (n->transmission_task != GNUNET_SCHEDULER_NO_TASK)
677 return; /* currently waiting for bandwidth */
679 while (NULL != (mq = n->messages_head))
681 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
682 if (timeout.rel_value > 0)
684 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
687 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR); /* timeout */
690 return; /* no more messages */
692 if (GST_plugins_find (n->plugin_name) == NULL)
697 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
701 if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen == 0))
703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No address for peer `%s'\n",
704 GNUNET_i2s (&n->id));
705 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
706 GNUNET_assert (n->transmission_task == GNUNET_SCHEDULER_NO_TASK);
707 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
711 ret = send_with_plugin (&n->id,
712 mq->message_buf, mq->message_buf_size, 0,
714 n->session, n->plugin_name, n->addr, n->addrlen,
716 &transmit_send_continuation, mq);
719 /* failure, but 'send' would not call continuation in this case,
720 * so we need to do it here! */
721 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR);
728 * Task invoked to start a transmission to another peer.
730 * @param cls the 'struct NeighbourMapEntry'
731 * @param tc scheduler context
734 transmission_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
736 struct NeighbourMapEntry *n = cls;
737 GNUNET_assert (NULL != lookup_neighbour(&n->id));
738 n->transmission_task = GNUNET_SCHEDULER_NO_TASK;
739 try_transmission_to_peer (n);
744 * Initialize the neighbours subsystem.
746 * @param cls closure for callbacks
747 * @param connect_cb function to call if we connect to a peer
748 * @param disconnect_cb function to call if we disconnect from a peer
751 GST_neighbours_start (void *cls, GNUNET_TRANSPORT_NotifyConnect connect_cb,
752 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb)
755 connect_notify_cb = connect_cb;
756 disconnect_notify_cb = disconnect_cb;
757 neighbours = GNUNET_CONTAINER_multihashmap_create (NEIGHBOUR_TABLE_SIZE);
762 send_disconnect_cont (void *cls,
763 const struct GNUNET_PeerIdentity * target,
767 struct NeighbourMapEntry *n = cls;
768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending DISCONNECT message to peer `%4s': %i\n",
769 GNUNET_i2s (&n->id), result);
774 send_disconnect (struct NeighbourMapEntry *n)
777 struct SessionDisconnectMessage disconnect_msg;
780 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending DISCONNECT message to peer `%4s'\n",
781 GNUNET_i2s (&n->id));
784 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
785 disconnect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
786 disconnect_msg.reserved = htonl (0);
787 disconnect_msg.purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
788 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
789 sizeof (struct GNUNET_TIME_AbsoluteNBO) );
790 disconnect_msg.purpose.purpose = htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
791 disconnect_msg.timestamp = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
792 disconnect_msg.public_key = GST_my_public_key;
793 GNUNET_assert (GNUNET_OK ==
794 GNUNET_CRYPTO_rsa_sign (GST_my_private_key,
795 &disconnect_msg.purpose,
796 &disconnect_msg.signature));
798 ret = send_with_plugin(&n->id, (const char *) &disconnect_msg, sizeof (disconnect_msg),
799 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
800 n->session, n->plugin_name, n->addr, n->addrlen,
801 GNUNET_YES, &send_disconnect_cont, n);
803 if (ret == GNUNET_SYSERR)
804 return GNUNET_SYSERR;
806 GNUNET_STATISTICS_update (GST_stats,
807 gettext_noop ("# peers disconnected due to external request"), 1,
813 * Disconnect from the given neighbour, clean up the record.
815 * @param n neighbour to disconnect from
818 disconnect_neighbour (struct NeighbourMapEntry *n)
820 struct MessageQueue *mq;
821 int was_connected = is_connected(n);
823 /* send DISCONNECT MESSAGE */
824 if (is_connected(n) || is_connecting(n))
826 if (GNUNET_OK == send_disconnect(n))
827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sent DISCONNECT_MSG to `%s'\n",
828 GNUNET_i2s (&n->id));
830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Could not send DISCONNECT_MSG to `%s'\n",
831 GNUNET_i2s (&n->id));
835 if (is_disconnecting(n))
837 change_state (n, S_DISCONNECT);
839 while (NULL != (mq = n->messages_head))
841 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
842 if (NULL != mq->cont)
843 mq->cont (mq->cont_cls, GNUNET_SYSERR);
846 if (NULL != n->is_active)
848 n->is_active->n = NULL;
853 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->keepalive_task);
854 GNUNET_SCHEDULER_cancel (n->keepalive_task);
855 n->keepalive_task = GNUNET_SCHEDULER_NO_TASK;
856 GNUNET_assert (neighbours_connected > 0);
857 neighbours_connected--;
858 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), -1,
860 disconnect_notify_cb (callback_cls, &n->id);
862 GNUNET_assert (GNUNET_YES ==
863 GNUNET_CONTAINER_multihashmap_remove (neighbours,
864 &n->id.hashPubKey, n));
865 if (GNUNET_SCHEDULER_NO_TASK != n->ats_suggest)
867 GNUNET_SCHEDULER_cancel (n->ats_suggest);
868 n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
870 if (GNUNET_SCHEDULER_NO_TASK != n->timeout_task)
872 GNUNET_SCHEDULER_cancel (n->timeout_task);
873 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
875 if (GNUNET_SCHEDULER_NO_TASK != n->transmission_task)
877 GNUNET_SCHEDULER_cancel (n->transmission_task);
878 n->transmission_task = GNUNET_SCHEDULER_NO_TASK;
880 if (NULL != n->plugin_name)
882 GNUNET_free (n->plugin_name);
883 n->plugin_name = NULL;
887 GNUNET_free (n->addr);
892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deleting peer `%4s', %X\n",
893 GNUNET_i2s (&n->id), n);
899 * Peer has been idle for too long. Disconnect.
901 * @param cls the 'struct NeighbourMapEntry' of the neighbour that went idle
902 * @param tc scheduler context
905 neighbour_timeout_task (void *cls,
906 const struct GNUNET_SCHEDULER_TaskContext *tc)
908 struct NeighbourMapEntry *n = cls;
910 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
912 GNUNET_STATISTICS_update (GST_stats,
913 gettext_noop ("# peers disconnected due to timeout"), 1,
915 disconnect_neighbour (n);
920 * Send another keepalive message.
922 * @param cls the 'struct NeighbourMapEntry' of the neighbour that went idle
923 * @param tc scheduler context
926 neighbour_keepalive_task (void *cls,
927 const struct GNUNET_SCHEDULER_TaskContext *tc)
929 struct NeighbourMapEntry *n = cls;
930 struct GNUNET_MessageHeader m;
932 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
933 &neighbour_keepalive_task,
935 GNUNET_assert (is_connected(n));
936 GNUNET_STATISTICS_update (GST_stats,
937 gettext_noop ("# keepalives sent"), 1,
939 m.size = htons (sizeof (struct GNUNET_MessageHeader));
940 m.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
942 send_with_plugin(&n->id, (const void *) &m,
944 UINT32_MAX /* priority */ ,
945 GNUNET_TIME_UNIT_FOREVER_REL,
946 n->session, n->plugin_name, n->addr, n->addrlen,
947 GNUNET_YES, NULL, NULL);
952 * Disconnect from the given neighbour.
955 * @param key hash of neighbour's public key (not used)
956 * @param value the 'struct NeighbourMapEntry' of the neighbour
959 disconnect_all_neighbours (void *cls, const GNUNET_HashCode * key, void *value)
961 struct NeighbourMapEntry *n = value;
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s', %s\n",
965 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
968 GNUNET_STATISTICS_update (GST_stats,
969 gettext_noop ("# peers disconnected due to global disconnect"), 1,
971 disconnect_neighbour (n);
977 ats_suggest_cancel (void *cls,
978 const struct GNUNET_SCHEDULER_TaskContext *tc)
980 struct NeighbourMapEntry *n = cls;
982 n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
985 " ATS did not suggested address to connect to peer `%s'\n",
986 GNUNET_i2s (&n->id));
988 disconnect_neighbour(n);
993 * Cleanup the neighbours subsystem.
996 GST_neighbours_stop ()
998 GNUNET_assert (neighbours != NULL);
1000 GNUNET_CONTAINER_multihashmap_iterate (neighbours, &disconnect_all_neighbours,
1002 GNUNET_CONTAINER_multihashmap_destroy (neighbours);
1003 GNUNET_assert (neighbours_connected == 0);
1005 callback_cls = NULL;
1006 connect_notify_cb = NULL;
1007 disconnect_notify_cb = NULL;
1012 * We tried to send a SESSION_CONNECT message to another peer. If this
1013 * succeeded, we change the state. If it failed, we should tell
1014 * ATS to not use this address anymore (until it is re-validated).
1016 * @param cls the 'struct NeighbourMapEntry'
1017 * @param success GNUNET_OK on success
1020 send_connect_continuation (void *cls,
1021 const struct GNUNET_PeerIdentity * target,
1025 struct NeighbourMapEntry *n = cls;
1027 GNUNET_assert (n != NULL);
1028 GNUNET_assert (!is_connected(n));
1030 if (is_disconnecting(n))
1031 return; /* neighbour is going away */
1032 if (GNUNET_YES != success)
1035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1036 "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
1037 GNUNET_i2s (&n->id), n->plugin_name,
1038 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1044 GNUNET_ATS_address_destroyed (GST_ats,
1051 if (n->ats_suggest!= GNUNET_SCHEDULER_NO_TASK)
1052 GNUNET_SCHEDULER_cancel(n->ats_suggest);
1053 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
1054 GNUNET_ATS_suggest_address(GST_ats, &n->id);
1057 change_state(n, S_CONNECT_SENT);
1062 * We tried to switch addresses with an peer already connected. If it failed,
1063 * we should tell ATS to not use this address anymore (until it is re-validated).
1065 * @param cls the 'struct NeighbourMapEntry'
1066 * @param success GNUNET_OK on success
1069 send_switch_address_continuation (void *cls,
1070 const struct GNUNET_PeerIdentity * target,
1074 struct NeighbourMapEntry *n = cls;
1076 GNUNET_assert (n != NULL);
1077 if (is_disconnecting(n))
1078 return; /* neighbour is going away */
1080 GNUNET_assert (n->state == S_CONNECTED);
1081 if (GNUNET_YES != success)
1084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1085 "Failed to switch connected peer `%s' to plugin `%s' address '%s' session %X, asking ATS for new address \n",
1086 GNUNET_i2s (&n->id), n->plugin_name,
1087 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1093 GNUNET_ATS_address_destroyed (GST_ats,
1100 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
1101 GNUNET_SCHEDULER_cancel(n->ats_suggest);
1102 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
1103 GNUNET_ATS_suggest_address(GST_ats, &n->id);
1109 * We tried to send a SESSION_CONNECT message to another peer. If this
1110 * succeeded, we change the state. If it failed, we should tell
1111 * ATS to not use this address anymore (until it is re-validated).
1113 * @param cls the 'struct NeighbourMapEntry'
1114 * @param success GNUNET_OK on success
1117 send_connect_ack_continuation (void *cls,
1118 const struct GNUNET_PeerIdentity * target,
1122 struct NeighbourMapEntry *n = cls;
1124 GNUNET_assert (n != NULL);
1126 if (GNUNET_YES == success)
1127 return; /* sending successful */
1129 /* sending failed, ask for next address */
1131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1132 "Failed to send CONNECT_MSG to peer `%4s' with plugin `%s' address '%s' session %X, asking ATS for new address \n",
1133 GNUNET_i2s (&n->id), n->plugin_name,
1134 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1139 change_state(n, S_NOT_CONNECTED);
1141 GNUNET_ATS_address_destroyed (GST_ats,
1148 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
1149 GNUNET_SCHEDULER_cancel(n->ats_suggest);
1150 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
1151 GNUNET_ATS_suggest_address(GST_ats, &n->id);
1155 * For an existing neighbour record, set the active connection to
1156 * the given address.
1158 * @param peer identity of the peer to switch the address for
1159 * @param plugin_name name of transport that delivered the PONG
1160 * @param address address of the other peer, NULL if other peer
1162 * @param address_len number of bytes in address
1163 * @param session session to use (or NULL)
1164 * @param ats performance data
1165 * @param ats_count number of entries in ats
1166 * @return GNUNET_YES if we are currently connected, GNUNET_NO if the
1167 * connection is not up (yet)
1170 GST_neighbours_switch_to_address_3way (const struct GNUNET_PeerIdentity *peer,
1171 const char *plugin_name, const void *address,
1172 size_t address_len, struct Session *session,
1173 const struct GNUNET_ATS_Information
1174 *ats, uint32_t ats_count,
1175 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1176 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
1178 struct NeighbourMapEntry *n;
1179 struct SessionConnectMessage connect_msg;
1183 GNUNET_assert (neighbours != NULL);
1184 n = lookup_neighbour (peer);
1187 if (NULL == session)
1188 GNUNET_ATS_address_destroyed (GST_ats,
1190 plugin_name, address,
1195 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
1197 GNUNET_SCHEDULER_cancel(n->ats_suggest);
1198 n->ats_suggest = GNUNET_SCHEDULER_NO_TASK;
1202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1203 "ATS tells us to switch to plugin `%s' address '%s' session %X for %s peer `%s'\n",
1205 (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
1208 session, (is_connected(n) ? "CONNECTED" : "NOT CONNECTED"),
1212 // do not switch addresses just update quotas
1215 if ((is_connected(n)) && (address_len == n->addrlen))
1217 if ((0 == memcmp (address, n->addr, address_len)) &&
1218 (n->session == session))
1220 struct QuotaSetMessage q_msg;
1223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1224 "Sending outbound quota of %u Bps and inbound quota of % Bps for peer `%s' to all clients\n",
1225 ntohl (n->bandwidth_out.value__),
1226 ntohl (n->bandwidth_in.value__),
1230 n->bandwidth_in = bandwidth_in;
1231 n->bandwidth_out = bandwidth_out;
1232 GST_neighbours_set_incoming_quota(&n->id, n->bandwidth_in);
1234 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
1235 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
1236 q_msg.quota = n->bandwidth_out;
1237 q_msg.peer = (*peer);
1238 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
1244 GNUNET_free_non_null (n->addr);
1245 n->addr = GNUNET_malloc (address_len);
1246 memcpy (n->addr, address, address_len);
1247 n->bandwidth_in = bandwidth_in;
1248 n->bandwidth_out = bandwidth_out;
1249 n->addrlen = address_len;
1250 n->session = session;
1251 GNUNET_free_non_null (n->plugin_name);
1252 n->plugin_name = GNUNET_strdup (plugin_name);
1253 GNUNET_SCHEDULER_cancel (n->timeout_task);
1255 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1256 &neighbour_timeout_task, n);
1258 if (n->state == S_DISCONNECT)
1260 /* We are disconnecting, nothing to do here */
1263 /* We are not connected/connecting and initiate a fresh connect */
1264 if (n->state == S_NOT_CONNECTED)
1266 msg_len = sizeof (struct SessionConnectMessage);
1267 connect_msg.header.size = htons (msg_len);
1268 connect_msg.header.type =
1269 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1270 connect_msg.reserved = htonl (0);
1271 connect_msg.timestamp =
1272 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1274 ret = send_with_plugin (peer, (const char *) &connect_msg, msg_len, UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1275 session, plugin_name, address, address_len,
1276 GNUNET_YES, &send_connect_continuation, n);
1280 /* We received a CONNECT message and asked ATS for an address */
1281 else if (n->state == S_CONNECT_RECV)
1283 msg_len = sizeof (struct SessionConnectMessage);
1284 connect_msg.header.size = htons (msg_len);
1285 connect_msg.header.type =
1286 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1287 connect_msg.reserved = htonl (0);
1288 connect_msg.timestamp = GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1290 ret = send_with_plugin(&n->id, (const void *) &connect_msg, msg_len, UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1291 session, plugin_name, address, address_len,
1292 GNUNET_YES, &send_connect_ack_continuation, n);
1295 /* connected peer is switching addresses */
1296 else if (n->state == S_CONNECTED)
1298 msg_len = sizeof (struct SessionConnectMessage);
1299 connect_msg.header.size = htons (msg_len);
1300 connect_msg.header.type =
1301 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1302 connect_msg.reserved = htonl (0);
1303 connect_msg.timestamp =
1304 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1306 ret = send_with_plugin (peer, (const char *) &connect_msg, msg_len, UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1307 session, plugin_name, address, address_len,
1308 GNUNET_YES, &send_switch_address_continuation, n);
1309 if (ret == GNUNET_SYSERR)
1311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1312 "Failed to send CONNECT_MESSAGE to `%4s' using plugin `%s' address '%s' session %X\n",
1313 GNUNET_i2s (peer), plugin_name,
1314 (address_len == 0) ? "<inbound>" : GST_plugins_a2s (plugin_name,
1321 else if (n->state == S_CONNECT_SENT)
1326 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid connection state to switch addresses %u \n", n->state);
1327 GNUNET_break_op (0);
1333 * Create an entry in the neighbour map for the given peer
1335 * @param peer peer to create an entry for
1336 * @return new neighbour map entry
1338 static struct NeighbourMapEntry *
1339 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
1341 struct NeighbourMapEntry *n;
1344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1345 "Unknown peer `%s', creating new neighbour\n",
1348 n = GNUNET_malloc (sizeof (struct NeighbourMapEntry));
1350 n->state = S_NOT_CONNECTED;
1351 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
1352 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
1353 MAX_BANDWIDTH_CARRY_S);
1355 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1356 &neighbour_timeout_task, n);
1357 GNUNET_assert (GNUNET_OK ==
1358 GNUNET_CONTAINER_multihashmap_put (neighbours,
1359 &n->id.hashPubKey, n,
1360 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1366 * Try to create a connection to the given target (eventually).
1368 * @param target peer to try to connect to
1371 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
1373 struct NeighbourMapEntry *n;
1375 GNUNET_assert (neighbours != NULL);
1377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Trying to connect to peer `%s'\n",
1378 GNUNET_i2s (target));
1381 memcmp (target, &GST_my_identity,
1382 sizeof (struct GNUNET_PeerIdentity)));
1383 n = lookup_neighbour (target);
1387 if ((is_connected(n)) || (is_connecting(n)))
1388 return; /* already connecting or connected */
1389 if (is_disconnecting(n))
1390 change_state (n, S_NOT_CONNECTED);
1395 n = setup_neighbour (target);
1397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1398 "Asking ATS for suggested address to connect to peer `%s'\n",
1399 GNUNET_i2s (&n->id));
1402 GNUNET_ATS_suggest_address (GST_ats, &n->id);
1406 * Test if we're connected to the given peer.
1408 * @param target peer to test
1409 * @return GNUNET_YES if we are connected, GNUNET_NO if not
1412 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
1414 struct NeighbourMapEntry *n;
1416 GNUNET_assert (neighbours != NULL);
1418 n = lookup_neighbour (target);
1420 if ((NULL == n) || (!is_connected(n)))
1421 return GNUNET_NO; /* not connected */
1427 * A session was terminated. Take note.
1429 * @param peer identity of the peer where the session died
1430 * @param session session that is gone
1433 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
1434 struct Session *session)
1436 struct NeighbourMapEntry *n;
1438 GNUNET_assert (neighbours != NULL);
1441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1442 "Session %X to peer `%s' ended \n",
1443 session, GNUNET_i2s (peer));
1446 n = lookup_neighbour (peer);
1449 if (session != n->session)
1450 return; /* doesn't affect us */
1453 GNUNET_free (n->addr);
1457 /* not connected anymore anyway, shouldn't matter */
1458 if ((!is_connected(n)) && (!is_connecting(n)))
1461 /* We are connected, so ask ATS to switch addresses */
1462 GNUNET_SCHEDULER_cancel (n->timeout_task);
1464 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_DISCONNECT_SESSION_TIMEOUT,
1465 &neighbour_timeout_task, n);
1466 /* try QUICKLY to re-establish a connection, reduce timeout! */
1467 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
1468 GNUNET_SCHEDULER_cancel(n->ats_suggest);
1469 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
1470 GNUNET_ATS_suggest_address (GST_ats, peer);
1475 * Transmit a message to the given target using the active connection.
1477 * @param target destination
1478 * @param msg message to send
1479 * @param msg_size number of bytes in msg
1480 * @param timeout when to fail with timeout
1481 * @param cont function to call when done
1482 * @param cont_cls closure for 'cont'
1485 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1486 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1487 GST_NeighbourSendContinuation cont, void *cont_cls)
1489 struct NeighbourMapEntry *n;
1490 struct MessageQueue *mq;
1492 GNUNET_assert (neighbours != NULL);
1494 n = lookup_neighbour (target);
1495 if ((n == NULL) || (!is_connected(n)))
1497 GNUNET_STATISTICS_update (GST_stats,
1499 ("# messages not sent (no such peer or not connected)"),
1503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1504 "Could not send message to peer `%s': unknown neighbour",
1505 GNUNET_i2s (target));
1506 else if (!is_connected(n))
1507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1508 "Could not send message to peer `%s': not connected\n",
1509 GNUNET_i2s (target));
1512 cont (cont_cls, GNUNET_SYSERR);
1516 if ((n->session == NULL) && (n->addr == NULL) && (n->addrlen ==0))
1518 GNUNET_STATISTICS_update (GST_stats,
1520 ("# messages not sent (no such peer or not connected)"),
1523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1524 "Could not send message to peer `%s': no address available\n",
1525 GNUNET_i2s (target));
1529 cont (cont_cls, GNUNET_SYSERR);
1533 GNUNET_assert (msg_size >= sizeof (struct GNUNET_MessageHeader));
1534 GNUNET_STATISTICS_update (GST_stats,
1536 ("# bytes in message queue for other peers"),
1537 msg_size, GNUNET_NO);
1538 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1540 mq->cont_cls = cont_cls;
1541 /* FIXME: this memcpy can be up to 7% of our total runtime! */
1542 memcpy (&mq[1], msg, msg_size);
1543 mq->message_buf = (const char *) &mq[1];
1544 mq->message_buf_size = msg_size;
1545 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1546 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1548 if ((GNUNET_SCHEDULER_NO_TASK == n->transmission_task) &&
1549 (NULL == n->is_active))
1550 n->transmission_task = GNUNET_SCHEDULER_add_now (&transmission_task, n);
1555 * We have received a message from the given sender. How long should
1556 * we delay before receiving more? (Also used to keep the peer marked
1559 * @param sender sender of the message
1560 * @param size size of the message
1561 * @param do_forward set to GNUNET_YES if the message should be forwarded to clients
1562 * GNUNET_NO if the neighbour is not connected or violates the quota,
1563 * GNUNET_SYSERR if the connection is not fully up yet
1564 * @return how long to wait before reading more from this sender
1566 struct GNUNET_TIME_Relative
1567 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1568 *sender, ssize_t size, int *do_forward)
1570 struct NeighbourMapEntry *n;
1571 struct GNUNET_TIME_Relative ret;
1573 GNUNET_assert (neighbours != NULL);
1575 n = lookup_neighbour (sender);
1578 GST_neighbours_try_connect (sender);
1579 n = lookup_neighbour (sender);
1582 GNUNET_STATISTICS_update (GST_stats,
1584 ("# messages discarded due to lack of neighbour record"),
1586 *do_forward = GNUNET_NO;
1587 return GNUNET_TIME_UNIT_ZERO;
1590 if (!is_connected(n))
1592 *do_forward = GNUNET_SYSERR;
1593 return GNUNET_TIME_UNIT_ZERO;
1595 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1597 n->quota_violation_count++;
1599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1600 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1601 n->in_tracker.available_bytes_per_s__,
1602 n->quota_violation_count);
1604 /* Discount 32k per violation */
1605 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1609 if (n->quota_violation_count > 0)
1611 /* try to add 32k back */
1612 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1613 n->quota_violation_count--;
1616 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1618 GNUNET_STATISTICS_update (GST_stats,
1620 ("# bandwidth quota violations by other peers"),
1622 *do_forward = GNUNET_NO;
1623 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1625 *do_forward = GNUNET_YES;
1626 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1627 if (ret.rel_value > 0)
1630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1631 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
1632 (unsigned long long) n->in_tracker.
1633 consumption_since_last_update__,
1634 (unsigned int) n->in_tracker.available_bytes_per_s__,
1635 (unsigned long long) ret.rel_value);
1637 GNUNET_STATISTICS_update (GST_stats,
1638 gettext_noop ("# ms throttling suggested"),
1639 (int64_t) ret.rel_value, GNUNET_NO);
1646 * Keep the connection to the given neighbour alive longer,
1647 * we received a KEEPALIVE (or equivalent).
1649 * @param neighbour neighbour to keep alive
1652 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour)
1654 struct NeighbourMapEntry *n;
1656 GNUNET_assert (neighbours != NULL);
1658 n = lookup_neighbour (neighbour);
1661 GNUNET_STATISTICS_update (GST_stats,
1663 ("# KEEPALIVE messages discarded (not connected)"),
1667 GNUNET_SCHEDULER_cancel (n->timeout_task);
1669 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1670 &neighbour_timeout_task, n);
1675 * Change the incoming quota for the given peer.
1677 * @param neighbour identity of peer to change qutoa for
1678 * @param quota new quota
1681 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
1682 struct GNUNET_BANDWIDTH_Value32NBO quota)
1684 struct NeighbourMapEntry *n;
1686 GNUNET_assert (neighbours != NULL);
1688 n = lookup_neighbour (neighbour);
1691 GNUNET_STATISTICS_update (GST_stats,
1693 ("# SET QUOTA messages ignored (no such peer)"),
1697 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
1698 if (0 != ntohl (quota.value__))
1701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s' due to `%s'\n",
1702 GNUNET_i2s (&n->id), "SET_QUOTA");
1704 if (is_connected(n))
1705 GNUNET_STATISTICS_update (GST_stats,
1706 gettext_noop ("# disconnects due to quota of 0"), 1,
1708 disconnect_neighbour (n);
1713 * Closure for the neighbours_iterate function.
1715 struct IteratorContext
1718 * Function to call on each connected neighbour.
1720 GST_NeighbourIterator cb;
1730 * Call the callback from the closure for each connected neighbour.
1732 * @param cls the 'struct IteratorContext'
1733 * @param key the hash of the public key of the neighbour
1734 * @param value the 'struct NeighbourMapEntry'
1735 * @return GNUNET_OK (continue to iterate)
1738 neighbours_iterate (void *cls, const GNUNET_HashCode * key, void *value)
1740 struct IteratorContext *ic = cls;
1741 struct NeighbourMapEntry *n = value;
1743 if (!is_connected(n))
1746 ic->cb (ic->cb_cls, &n->id, NULL, 0, n->plugin_name, n->addr, n->addrlen);
1752 * Iterate over all connected neighbours.
1754 * @param cb function to call
1755 * @param cb_cls closure for cb
1758 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
1760 struct IteratorContext ic;
1762 GNUNET_assert (neighbours != NULL);
1766 GNUNET_CONTAINER_multihashmap_iterate (neighbours, &neighbours_iterate, &ic);
1770 * If we have an active connection to the given target, it must be shutdown.
1772 * @param target peer to disconnect from
1775 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
1777 struct NeighbourMapEntry *n;
1779 GNUNET_assert (neighbours != NULL);
1781 n = lookup_neighbour (target);
1783 return; /* not active */
1784 if (is_connected(n))
1788 n = lookup_neighbour (target);
1790 return; /* gone already */
1792 disconnect_neighbour (n);
1797 * We received a disconnect message from the given peer,
1798 * validate and process.
1800 * @param peer sender of the message
1801 * @param msg the disconnect message
1804 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
1805 const struct GNUNET_MessageHeader *msg)
1807 struct NeighbourMapEntry *n;
1808 const struct SessionDisconnectMessage *sdm;
1812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1813 "Received DISCONNECT message from peer `%s'\n", GNUNET_i2s (peer));
1816 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
1818 // GNUNET_break_op (0);
1819 GNUNET_STATISTICS_update (GST_stats,
1820 gettext_noop ("# disconnect messages ignored (old format)"), 1,
1824 sdm = (const struct SessionDisconnectMessage* ) msg;
1825 n = lookup_neighbour (peer);
1827 return; /* gone already */
1828 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value <=
1829 n->connect_ts.abs_value)
1831 GNUNET_STATISTICS_update (GST_stats,
1832 gettext_noop ("# disconnect messages ignored (timestamp)"), 1,
1836 GNUNET_CRYPTO_hash (&sdm->public_key,
1837 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1839 if (0 != memcmp (peer,
1841 sizeof (struct GNUNET_PeerIdentity)))
1843 GNUNET_break_op (0);
1846 if (ntohl (sdm->purpose.size) !=
1847 sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
1848 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
1849 sizeof (struct GNUNET_TIME_AbsoluteNBO))
1851 GNUNET_break_op (0);
1855 GNUNET_CRYPTO_rsa_verify (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT,
1860 GNUNET_break_op (0);
1863 GST_neighbours_force_disconnect (peer);
1867 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
1868 * Consider switching to it.
1870 * @param message possibly a 'struct SessionConnectMessage' (check format)
1871 * @param peer identity of the peer to switch the address for
1872 * @param plugin_name name of transport that delivered the PONG
1873 * @param address address of the other peer, NULL if other peer
1875 * @param address_len number of bytes in address
1876 * @param session session to use (or NULL)
1877 * @param ats performance data
1878 * @param ats_count number of entries in ats
1881 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
1882 const struct GNUNET_PeerIdentity *peer,
1883 const char *plugin_name,
1884 const char *sender_address, uint16_t sender_address_len,
1885 struct Session *session,
1886 const struct GNUNET_ATS_Information *ats,
1889 const struct SessionConnectMessage *scm;
1890 struct QuotaSetMessage q_msg;
1891 struct GNUNET_MessageHeader msg;
1892 struct NeighbourMapEntry *n;
1898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1899 "Received CONNECT_ACK message from peer `%s'\n", GNUNET_i2s (peer));
1902 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
1904 GNUNET_break_op (0);
1908 scm = (const struct SessionConnectMessage *) message;
1909 GNUNET_break_op (ntohl (scm->reserved) == 0);
1910 n = lookup_neighbour (peer);
1912 n = setup_neighbour (peer);
1914 if (n->state != S_CONNECT_SENT)
1921 if (NULL != session)
1922 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
1924 "Giving ATS session %p of plugin %s for peer %s\n",
1928 GNUNET_ATS_address_update (GST_ats,
1930 plugin_name, sender_address, sender_address_len,
1931 session, ats, ats_count);
1933 was_connected = is_connected(n);
1934 if (!is_connected(n))
1935 change_state (n, S_CONNECTED);
1938 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1939 "Setting inbound quota of %u for peer `%s' to \n",
1940 ntohl (n->bandwidth_in.value__), GNUNET_i2s (&n->id));
1942 GST_neighbours_set_incoming_quota(&n->id, n->bandwidth_in);
1945 msg_len = sizeof (msg);
1946 msg.size = htons (msg_len);
1947 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
1949 ret = send_with_plugin (&n->id, (const char *) &msg, msg_len, UINT32_MAX,
1950 GNUNET_TIME_UNIT_FOREVER_REL,
1951 n->session, n->plugin_name, n->addr, n->addrlen,
1952 GNUNET_YES, NULL, NULL);
1954 if (ret == GNUNET_SYSERR)
1955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1956 "Failed to send SESSION_ACK to `%4s' using plugin `%s' address '%s' session %X\n",
1957 GNUNET_i2s (&n->id), n->plugin_name,
1958 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1966 if (n->keepalive_task == GNUNET_SCHEDULER_NO_TASK)
1967 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
1968 &neighbour_keepalive_task,
1971 neighbours_connected++;
1972 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
1975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1976 "Notify about connect of `%4s' using plugin `%s' address '%s' session %X LINE %u\n",
1977 GNUNET_i2s (&n->id), n->plugin_name,
1978 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
1981 n->session, __LINE__);
1983 connect_notify_cb (callback_cls, &n->id, ats, ats_count);
1987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1988 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
1989 ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
1991 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
1992 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
1993 q_msg.quota = n->bandwidth_out;
1994 q_msg.peer = (*peer);
1995 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
2000 GST_neighbours_handle_ack (const struct GNUNET_MessageHeader *message,
2001 const struct GNUNET_PeerIdentity *peer,
2002 const char *plugin_name,
2003 const char *sender_address, uint16_t sender_address_len,
2004 struct Session *session,
2005 const struct GNUNET_ATS_Information *ats,
2008 struct NeighbourMapEntry *n;
2009 struct QuotaSetMessage q_msg;
2013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2014 "Received ACK message from peer `%s'\n", GNUNET_i2s (peer));
2017 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
2019 GNUNET_break_op (0);
2023 n = lookup_neighbour (peer);
2030 if (is_connected(n))
2033 if (NULL != session)
2034 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2036 "Giving ATS session %p of plugin %s for peer %s\n",
2040 GNUNET_ATS_address_update (GST_ats,
2042 plugin_name, sender_address, sender_address_len,
2043 session, ats, ats_count);
2045 was_connected = is_connected(n);
2046 change_state (n, S_CONNECTED);
2048 GST_neighbours_set_incoming_quota(&n->id, n->bandwidth_in);
2050 if (n->keepalive_task == GNUNET_SCHEDULER_NO_TASK)
2051 n->keepalive_task = GNUNET_SCHEDULER_add_delayed (KEEPALIVE_FREQUENCY,
2052 &neighbour_keepalive_task,
2057 neighbours_connected++;
2058 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# peers connected"), 1,
2062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2063 "Notify about connect of `%4s' using plugin `%s' address '%s' session %X LINE %u\n",
2064 GNUNET_i2s (&n->id), n->plugin_name,
2065 (n->addrlen == 0) ? "<inbound>" : GST_plugins_a2s (n->plugin_name,
2068 n->session, __LINE__);
2070 connect_notify_cb (callback_cls, &n->id, ats, ats_count);
2073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2074 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
2075 ntohl (n->bandwidth_out.value__), GNUNET_i2s (peer));
2078 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
2079 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
2080 q_msg.quota = n->bandwidth_out;
2081 q_msg.peer = (*peer);
2082 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
2086 struct BlackListCheckContext
2088 struct GNUNET_ATS_Information *ats;
2092 struct Session *session;
2094 char *sender_address;
2096 uint16_t sender_address_len;
2100 struct GNUNET_TIME_Absolute ts;
2105 handle_connect_blacklist_cont (void *cls,
2106 const struct GNUNET_PeerIdentity
2109 struct NeighbourMapEntry *n;
2110 struct BlackListCheckContext * bcc = cls;
2113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2114 "Blacklist check due to CONNECT message: `%s'\n", GNUNET_i2s (peer), (result == GNUNET_OK) ? "ALLOWED" : "FORBIDDEN");
2118 if (GNUNET_OK != result)
2124 n = lookup_neighbour (peer);
2126 n = setup_neighbour (peer);
2128 if (bcc->ts.abs_value > n->connect_ts.abs_value)
2130 if (NULL != bcc->session)
2131 GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2133 "Giving ATS session %p of plugin %s address `%s' for peer %s\n",
2136 GST_plugins_a2s (bcc->plugin_name, bcc->sender_address, bcc->sender_address_len),
2138 GNUNET_ATS_address_update (GST_ats,
2140 bcc->plugin_name, bcc->sender_address, bcc->sender_address_len,
2141 bcc->session, bcc->ats, bcc->ats_count);
2142 n->connect_ts = bcc->ts;
2147 if (n->state != S_NOT_CONNECTED)
2149 change_state (n, S_CONNECT_RECV);
2151 /* Ask ATS for an address to connect via that address */
2152 if (n->ats_suggest != GNUNET_SCHEDULER_NO_TASK)
2153 GNUNET_SCHEDULER_cancel(n->ats_suggest);
2154 n->ats_suggest = GNUNET_SCHEDULER_add_delayed (ATS_RESPONSE_TIMEOUT, ats_suggest_cancel, n);
2155 GNUNET_ATS_suggest_address(GST_ats, peer);
2159 * We received a 'SESSION_CONNECT' message from the other peer.
2160 * Consider switching to it.
2162 * @param message possibly a 'struct SessionConnectMessage' (check format)
2163 * @param peer identity of the peer to switch the address for
2164 * @param plugin_name name of transport that delivered the PONG
2165 * @param address address of the other peer, NULL if other peer
2167 * @param address_len number of bytes in address
2168 * @param session session to use (or NULL)
2169 * @param ats performance data
2170 * @param ats_count number of entries in ats (excluding 0-termination)
2173 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2174 const struct GNUNET_PeerIdentity *peer,
2175 const char *plugin_name,
2176 const char *sender_address, uint16_t sender_address_len,
2177 struct Session *session,
2178 const struct GNUNET_ATS_Information *ats,
2181 const struct SessionConnectMessage *scm;
2182 struct NeighbourMapEntry * n;
2183 struct BlackListCheckContext * bcc = NULL;
2186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2187 "Received CONNECT message from peer `%s'\n", GNUNET_i2s (peer));
2190 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2192 GNUNET_break_op (0);
2196 scm = (const struct SessionConnectMessage *) message;
2197 GNUNET_break_op (ntohl (scm->reserved) == 0);
2199 n = lookup_neighbour(peer);
2202 /* connected peer switches addresses */
2203 if (is_connected(n))
2205 GNUNET_ATS_address_update(GST_ats, peer, plugin_name, sender_address, sender_address_len, session, ats, ats_count);
2210 /* we are not connected to this peer */
2211 /* do blacklist check*/
2212 bcc = GNUNET_malloc (sizeof (struct BlackListCheckContext) +
2213 sizeof (struct GNUNET_ATS_Information) * ats_count +
2214 sender_address_len +
2215 strlen (plugin_name)+1);
2217 bcc->ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2219 bcc->ats_count = ats_count;
2220 bcc->sender_address_len = sender_address_len;
2221 bcc->session = session;
2223 bcc->ats = (struct GNUNET_ATS_Information *) &bcc[1];
2224 memcpy (bcc->ats, ats,sizeof (struct GNUNET_ATS_Information) * ats_count );
2226 bcc->sender_address = (char *) &bcc->ats[ats_count];
2227 memcpy (bcc->sender_address, sender_address , sender_address_len);
2229 bcc->plugin_name = &bcc->sender_address[sender_address_len];
2230 strcpy (bcc->plugin_name, plugin_name);
2232 GST_blacklist_test_allowed (peer, plugin_name, handle_connect_blacklist_cont, bcc);
2236 /* end of file gnunet-service-transport_neighbours.c */