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3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
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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"
41 * Size of the neighbour hash map.
43 #define NEIGHBOUR_TABLE_SIZE 256
46 * Time we give plugin to transmit DISCONNECT message before the
47 * neighbour entry self-destructs.
49 #define DISCONNECT_SENT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 100)
52 * How often must a peer violate bandwidth quotas before we start
53 * to simply drop its messages?
55 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
58 * How long are we willing to wait for a response from ATS before timing out?
60 #define ATS_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 5000)
63 * How long are we willing to wait for an ACK from the other peer before
64 * giving up on our connect operation?
66 #define SETUP_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
69 * How long are we willing to wait for a successful reconnect if
70 * an existing connection went down? Much shorter than the
71 * usual SETUP_CONNECTION_TIMEOUT as we do not inform the
72 * higher layers about the disconnect during this period.
74 #define FAST_RECONNECT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
77 * How long are we willing to wait for a response from the blacklist
78 * subsystem before timing out?
80 #define BLACKLIST_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
83 * Interval to send utilization data
85 #define UTIL_TRANSMISSION_INTERVAL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
87 GNUNET_NETWORK_STRUCT_BEGIN
90 * Message a peer sends to another to indicate that it intends to
91 * setup a connection/session for data exchange. A 'SESSION_CONNECT'
92 * should be answered with a 'SESSION_CONNECT_ACK' with the same body
93 * to confirm. A 'SESSION_CONNECT_ACK' should then be followed with
94 * a 'SESSION_ACK'. Once the 'SESSION_ACK' is received, both peers
95 * should be connected.
97 struct SessionConnectMessage
100 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT
101 * or #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK
103 struct GNUNET_MessageHeader header;
108 uint32_t reserved GNUNET_PACKED;
111 * Absolute time at the sender. Only the most recent connect
112 * message implies which session is preferred by the sender.
114 struct GNUNET_TIME_AbsoluteNBO timestamp;
120 * Message a peer sends to another when connected to indicate that a
121 * session is in use and the peer is still alive or to respond to a keep alive.
122 * A peer sends a message with type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE
123 * to request a message with #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
124 * When the keep alive response with type is received, transport service
125 * will call the respective plugin to update the session timeout
127 struct SessionKeepAliveMessage
130 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE or
131 * #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
133 struct GNUNET_MessageHeader header;
136 * A nonce to identify the session the keep alive is used for
138 uint32_t nonce GNUNET_PACKED;
142 * Message we send to the other peer to notify him that we intentionally
143 * are disconnecting (to reduce timeouts). This is just a friendly
144 * notification, peers must not rely on always receiving disconnect
147 struct SessionDisconnectMessage
150 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT
152 struct GNUNET_MessageHeader header;
157 uint32_t reserved GNUNET_PACKED;
160 * Purpose of the signature. Extends over the timestamp.
161 * Purpose should be #GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
163 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
166 * Absolute time at the sender. Only the most recent connect
167 * message implies which session is preferred by the sender.
169 struct GNUNET_TIME_AbsoluteNBO timestamp;
172 * Public key of the sender.
174 struct GNUNET_CRYPTO_EddsaPublicKey public_key;
177 * Signature of the peer that sends us the disconnect. Only
178 * valid if the timestamp is AFTER the timestamp from the
179 * corresponding 'CONNECT' message.
181 struct GNUNET_CRYPTO_EddsaSignature signature;
185 GNUNET_NETWORK_STRUCT_END
189 * For each neighbour we keep a list of messages
190 * that we still want to transmit to the neighbour.
196 * This is a doubly linked list.
198 struct MessageQueue *next;
201 * This is a doubly linked list.
203 struct MessageQueue *prev;
206 * Function to call once we're done.
208 GST_NeighbourSendContinuation cont;
211 * Closure for @e cont
216 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
217 * stuck together in memory. Allocated at the end of this struct.
219 const char *message_buf;
222 * Size of the message buf
224 size_t message_buf_size;
227 * At what time should we fail?
229 struct GNUNET_TIME_Absolute timeout;
237 * A possible address we could use to communicate with a neighbour.
239 struct NeighbourAddress
243 * Active session for this address.
245 struct Session *session;
248 * Network-level address information.
250 struct GNUNET_HELLO_Address *address;
253 * Timestamp of the 'SESSION_CONNECT' message we sent to the other
254 * peer for this address. Use to check that the ACK is in response
255 * to our most recent 'CONNECT'.
257 struct GNUNET_TIME_Absolute connect_timestamp;
260 * Inbound bandwidth from ATS for this address.
262 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
265 * Outbound bandwidth from ATS for this address.
267 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
270 * Did we tell ATS that this is our 'active' address?
275 * The current nonce sent in the last keep alive messages
277 uint32_t keep_alive_nonce;
282 * Entry in neighbours.
284 struct NeighbourMapEntry
288 * Head of list of messages we would like to send to this peer;
289 * must contain at most one message per client.
291 struct MessageQueue *messages_head;
294 * Tail of list of messages we would like to send to this peer; must
295 * contain at most one message per client.
297 struct MessageQueue *messages_tail;
300 * Are we currently trying to send a message? If so, which one?
302 struct MessageQueue *is_active;
305 * Primary address we currently use to communicate with the neighbour.
307 struct NeighbourAddress primary_address;
310 * Alternative address currently under consideration for communicating
311 * with the neighbour.
313 struct NeighbourAddress alternative_address;
316 * Identity of this neighbour.
318 struct GNUNET_PeerIdentity id;
321 * Main task that drives this peer (timeouts, keepalives, etc.).
322 * Always runs the 'master_task'.
324 GNUNET_SCHEDULER_TaskIdentifier task;
327 * At what time should we sent the next keep-alive message?
329 struct GNUNET_TIME_Absolute keep_alive_time;
332 * At what time did we sent the last keep-alive message? Used
333 * to calculate round-trip time ("latency").
335 struct GNUNET_TIME_Absolute last_keep_alive_time;
338 * Timestamp we should include in our next CONNECT_ACK message.
339 * (only valid if 'send_connect_ack' is #GNUNET_YES). Used to build
340 * our CONNECT_ACK message.
342 struct GNUNET_TIME_Absolute connect_ack_timestamp;
345 * ATS address suggest handle
347 struct GNUNET_ATS_SuggestHandle *suggest_handle;
350 * Time where we should cut the connection (timeout) if we don't
351 * make progress in the state machine (or get a KEEPALIVE_RESPONSE
352 * if we are in S_CONNECTED).
354 struct GNUNET_TIME_Absolute timeout;
357 * Latest calculated latency value
359 struct GNUNET_TIME_Relative latency;
362 * Tracker for inbound bandwidth.
364 struct GNUNET_BANDWIDTH_Tracker in_tracker;
367 * How often has the other peer (recently) violated the inbound
368 * traffic limit? Incremented by 10 per violation, decremented by 1
369 * per non-violation (for each time interval).
371 unsigned int quota_violation_count;
374 * The current state of the peer.
376 enum GNUNET_TRANSPORT_PeerState state;
379 * Did we sent an KEEP_ALIVE message and are we expecting a response?
381 int expect_latency_response;
384 * Flag to set if we still need to send a CONNECT_ACK message to the other peer
385 * (once we have an address to use and the peer has been allowed by our
386 * blacklist). Set to 1 if we need to send a CONNECT_ACK. Set to 2 if we
387 * did send a CONNECT_ACK and should go to 'S_CONNECTED' upon receiving
388 * a 'SESSION_ACK' (regardless of what our own state machine might say).
390 int send_connect_ack;
393 * Tracking utilization of outbound bandwidth
395 uint32_t util_payload_bytes_sent;
398 * Tracking utilization of inbound bandwidth
400 uint32_t util_payload_bytes_recv;
403 * Tracking utilization of outbound bandwidth
405 uint32_t util_total_bytes_sent;
408 * Tracking utilization of inbound bandwidth
410 uint32_t util_total_bytes_recv;
413 * Date of last utilization transmission
415 struct GNUNET_TIME_Absolute last_util_transmission;
420 * Context for blacklist checks and the #handle_test_blacklist_cont()
421 * function. Stores information about ongoing blacklist checks.
423 struct BlackListCheckContext
427 * We keep blacklist checks in a DLL.
429 struct BlackListCheckContext *next;
432 * We keep blacklist checks in a DLL.
434 struct BlackListCheckContext *prev;
437 * Address that is being checked.
439 struct NeighbourAddress na;
442 * Handle to the ongoing blacklist check.
444 struct GST_BlacklistCheck *bc;
449 * Hash map from peer identities to the respective 'struct NeighbourMapEntry'.
451 static struct GNUNET_CONTAINER_MultiPeerMap *neighbours;
454 * We keep blacklist checks in a DLL so that we can find
455 * the 'sessions' in their 'struct NeighbourAddress' if
456 * a session goes down.
458 static struct BlackListCheckContext *bc_head;
461 * We keep blacklist checks in a DLL.
463 static struct BlackListCheckContext *bc_tail;
466 * Closure for #connect_notify_cb, #disconnect_notify_cb and #neighbour_change_cb
468 static void *callback_cls;
471 * Function to call when we connected to a neighbour.
473 static NotifyConnect connect_notify_cb;
476 * Function to call when we disconnected from a neighbour.
478 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
481 * Function to call when a neighbour changed address, state or bandwidth.
483 static GNUNET_TRANSPORT_NeighbourChangeCallback neighbour_change_cb;
486 * counter for connected neighbours
488 static unsigned int neighbours_connected;
491 * Number of bytes we have currently queued for transmission.
493 static unsigned long long bytes_in_send_queue;
496 * Task transmitting utilization data
498 static GNUNET_SCHEDULER_TaskIdentifier util_transmission_tk;
502 * Lookup a neighbour entry in the neighbours hash map.
504 * @param pid identity of the peer to look up
505 * @return the entry, NULL if there is no existing record
507 static struct NeighbourMapEntry *
508 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
510 if (NULL == neighbours)
512 return GNUNET_CONTAINER_multipeermap_get (neighbours, pid);
517 * Test if we're connected to the given peer.
519 * @param n neighbour entry of peer to test
520 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
523 test_connected (struct NeighbourMapEntry *n)
527 return GNUNET_TRANSPORT_is_connected (n->state);
531 * Send information about a new outbound quota to our clients.
533 * @param target affected peer
534 * @param quota new quota
537 send_outbound_quota (const struct GNUNET_PeerIdentity *target,
538 struct GNUNET_BANDWIDTH_Value32NBO quota)
540 struct QuotaSetMessage q_msg;
542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
543 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
544 ntohl (quota.value__), GNUNET_i2s (target));
545 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
546 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
548 q_msg.peer = (*target);
549 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
554 * We don't need a given neighbour address any more.
555 * Release its resources and give appropriate notifications
556 * to ATS and other subsystems.
558 * @param na address we are done with; @a na itself must NOT be 'free'd, only the contents!
561 free_address (struct NeighbourAddress *na)
563 if (GNUNET_YES == na->ats_active)
565 GST_validation_set_address_use (na->address, na->session, GNUNET_NO);
566 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_NO);
569 na->ats_active = GNUNET_NO;
570 na->keep_alive_nonce = 0;
571 if (NULL != na->address)
573 GNUNET_HELLO_address_free (na->address);
581 * Set net state for this neighbour and notify monitoring
583 * @param n the respective neighbour
584 * @param s the new state
587 set_state (struct NeighbourMapEntry *n, enum GNUNET_TRANSPORT_PeerState s)
590 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s\n",
592 GNUNET_TRANSPORT_p2s(s));
593 neighbour_change_cb (callback_cls,
595 n->primary_address.address,
596 n->state, n->timeout,
597 n->primary_address.bandwidth_in,
598 n->primary_address.bandwidth_out);
603 * Set net state and state timeout for this neighbour and notify monitoring
605 * @param n the respective neighbour
606 * @param s the new state
607 * @param timeout the new timeout
610 set_state_and_timeout (struct NeighbourMapEntry *n,
611 enum GNUNET_TRANSPORT_PeerState s,
612 struct GNUNET_TIME_Absolute timeout)
615 n->timeout = timeout;
616 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s with timeout %s\n",
618 GNUNET_TRANSPORT_p2s(s),
619 GNUNET_STRINGS_absolute_time_to_string (timeout));
620 neighbour_change_cb (callback_cls,
622 n->primary_address.address,
623 n->state, n->timeout,
624 n->primary_address.bandwidth_in,
625 n->primary_address.bandwidth_out);
630 * Set new state timeout for this neighbour and notify monitoring
632 * @param n the respective neighbour
633 * @param timeout the new timeout
636 set_timeout (struct NeighbourMapEntry *n,
637 struct GNUNET_TIME_Absolute timeout)
639 n->timeout = timeout;
640 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed timeout %s\n",
642 GNUNET_STRINGS_absolute_time_to_string (timeout));
643 neighbour_change_cb (callback_cls,
645 n->primary_address.address,
646 n->state, n->timeout,
647 n->primary_address.bandwidth_in,
648 n->primary_address.bandwidth_out);
653 * Initialize the alternative address of a neighbour
655 * @param n the neighbour
656 * @param address address of the other peer, NULL if other peer
658 * @param session session to use (or NULL, in which case an
659 * address must be setup)
660 * @param bandwidth_in inbound quota to be used when connection is up
661 * @param bandwidth_out outbound quota to be used when connection is up
662 * @param is_active #GNUNET_YES to mark this as the active address with ATS
665 set_alternative_address (struct NeighbourMapEntry *n,
666 const struct GNUNET_HELLO_Address *address,
667 struct Session *session,
668 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
669 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
671 struct GNUNET_TRANSPORT_PluginFunctions *papi;
672 if (NULL == (papi = GST_plugins_find (address->transport_name)))
677 if (session == n->alternative_address.session)
679 n->alternative_address.bandwidth_in = bandwidth_in;
680 n->alternative_address.bandwidth_out = bandwidth_out;
683 free_address (&n->alternative_address);
685 session = papi->get_session (papi->cls, address);
688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
689 "Failed to obtain new session for peer `%s' and address '%s'\n",
690 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
691 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
695 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' configured alternative address %s\n",
697 GST_plugins_a2s(address));
699 n->alternative_address.address = GNUNET_HELLO_address_copy (address);
700 n->alternative_address.bandwidth_in = bandwidth_in;
701 n->alternative_address.bandwidth_out = bandwidth_out;
702 n->alternative_address.session = session;
703 n->alternative_address.ats_active = GNUNET_NO;
704 n->alternative_address.keep_alive_nonce = 0;
709 * Initialize the primary address of a neighbour
711 * @param n the neighbour
712 * @param address address of the other peer, NULL if other peer
714 * @param session session to use (or NULL, in which case an
715 * address must be setup)
716 * @param bandwidth_in inbound quota to be used when connection is up
717 * @param bandwidth_out outbound quota to be used when connection is up
718 * @param is_active #GNUNET_YES to mark this as the active address with ATS
721 set_primary_address (struct NeighbourMapEntry *n,
722 const struct GNUNET_HELLO_Address *address,
723 struct Session *session,
724 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
725 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
728 struct GNUNET_TRANSPORT_PluginFunctions *papi;
730 if (NULL == (papi = GST_plugins_find (address->transport_name)))
735 if (session == n->primary_address.session)
737 n->primary_address.bandwidth_in = bandwidth_in;
738 n->primary_address.bandwidth_out = bandwidth_out;
739 if (is_active != n->primary_address.ats_active)
741 n->primary_address.ats_active = is_active;
742 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, is_active);
743 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, is_active);
745 if (GNUNET_YES == is_active)
747 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
748 send_outbound_quota (&address->peer, bandwidth_out);
752 free_address (&n->primary_address);
754 session = papi->get_session (papi->cls, address);
757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
758 "Failed to obtain new session for peer `%s' and address '%s'\n",
759 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
760 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
764 n->primary_address.address = GNUNET_HELLO_address_copy (address);
765 n->primary_address.bandwidth_in = bandwidth_in;
766 n->primary_address.bandwidth_out = bandwidth_out;
767 n->primary_address.session = session;
768 n->primary_address.ats_active = is_active;
769 n->primary_address.keep_alive_nonce = 0;
770 if (GNUNET_YES == is_active)
772 /* Telling ATS about new session */
773 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, GNUNET_YES);
774 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, GNUNET_YES);
775 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
776 send_outbound_quota (&address->peer, bandwidth_out);
779 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' switched to address %s\n",
781 GST_plugins_a2s(address));
783 neighbour_change_cb (callback_cls,
785 n->primary_address.address,
786 n->state, n->timeout,
787 n->primary_address.bandwidth_in,
788 n->primary_address.bandwidth_out);
792 * Clear the primary address of a neighbour since this primary address is not
793 * valid anymore and notify monitoring about it
795 * @param n the neighbour
798 unset_primary_address (struct NeighbourMapEntry *n)
805 * Free a neighbour map entry.
807 * @param n entry to free
808 * @param keep_sessions #GNUNET_NO to tell plugin to terminate sessions,
809 * #GNUNET_YES to keep all sessions
812 free_neighbour (struct NeighbourMapEntry *n,
815 struct MessageQueue *mq;
816 struct GNUNET_TRANSPORT_PluginFunctions *papi;
817 struct GNUNET_HELLO_Address *backup_primary;
819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
820 "Freeing neighbur state of peer `%s'\n",
821 GNUNET_i2s (&n->id));
822 n->is_active = NULL; /* always free'd by its own continuation! */
824 /* fail messages currently in the queue */
825 while (NULL != (mq = n->messages_head))
827 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
828 if (NULL != mq->cont)
829 mq->cont (mq->cont_cls, GNUNET_SYSERR, mq->message_buf_size, 0);
832 /* It is too late to send other peer disconnect notifications, but at
833 least internally we need to get clean... */
834 if (GNUNET_YES == test_connected (n))
836 GNUNET_STATISTICS_set (GST_stats,
837 gettext_noop ("# peers connected"),
838 --neighbours_connected,
840 disconnect_notify_cb (callback_cls, &n->id);
842 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
844 if (NULL != n->primary_address.address)
846 backup_primary = GNUNET_HELLO_address_copy (n->primary_address.address);
849 backup_primary = NULL;
851 /* free addresses and mark as unused */
852 free_address (&n->primary_address);
853 free_address (&n->alternative_address);
855 /* FIXME: Note that if we are switching between two TCP sessions to
856 the same peer, we might want to selectively kill only one of
857 them! Killing all sessions like this seems to be very, very
860 /* cut transport-level connection */
861 if ((GNUNET_NO == keep_sessions) &&
862 (NULL != backup_primary) &&
863 (NULL != (papi = GST_plugins_find (backup_primary->transport_name))))
864 papi->disconnect_peer (papi->cls, &n->id);
866 GNUNET_free_non_null (backup_primary);
868 GNUNET_assert (GNUNET_YES ==
869 GNUNET_CONTAINER_multipeermap_remove (neighbours,
872 // FIXME-ATS-API: we might want to be more specific about
873 // which states we do this from in the future (ATS should
874 // have given us a 'suggest_address' handle, and if we have
875 // such a handle, we should cancel the operation here!
876 if (NULL != n->suggest_handle)
878 GNUNET_ATS_suggest_address_cancel (GST_ats, &n->id);
879 n->suggest_handle = NULL;
882 if (GNUNET_SCHEDULER_NO_TASK != n->task)
884 GNUNET_SCHEDULER_cancel (n->task);
885 n->task = GNUNET_SCHEDULER_NO_TASK;
887 /* free rest of memory */
893 * Transmit a message using the current session of the given
896 * @param n entry for the recipient
897 * @param msgbuf buffer to transmit
898 * @param msgbuf_size number of bytes in @a msgbuf buffer
899 * @param priority transmission priority
900 * @param timeout transmission timeout
901 * @param use_keepalive_timeout #GNUNET_YES to use plugin-specific keep-alive
902 * timeout (@a timeout is ignored in that case), #GNUNET_NO otherwise
903 * @param cont continuation to call when finished (can be NULL)
904 * @param cont_cls closure for @a cont
905 * @return timeout (copy of @a timeout or a calculated one if
906 * @a use_keepalive_timeout is #GNUNET_YES.
908 static struct GNUNET_TIME_Relative
909 send_with_session (struct NeighbourMapEntry *n,
910 const char *msgbuf, size_t msgbuf_size,
912 struct GNUNET_TIME_Relative timeout,
913 unsigned int use_keepalive_timeout,
914 GNUNET_TRANSPORT_TransmitContinuation cont,
917 struct GNUNET_TRANSPORT_PluginFunctions *papi;
918 struct GNUNET_TIME_Relative result = GNUNET_TIME_UNIT_FOREVER_REL;
920 GNUNET_assert (n->primary_address.session != NULL);
921 if ( ((NULL == (papi = GST_plugins_find (n->primary_address.address->transport_name)) ||
922 (-1 == papi->send (papi->cls,
923 n->primary_address.session,
926 (result = (GNUNET_NO == use_keepalive_timeout) ? timeout :
927 GNUNET_TIME_relative_divide (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
928 papi->query_keepalive_factor (papi->cls))),
929 cont, cont_cls)))) &&
931 cont (cont_cls, &n->id, GNUNET_SYSERR, msgbuf_size, 0);
932 GST_neighbours_notify_data_sent (&n->id,
933 n->primary_address.address, n->primary_address.session, msgbuf_size);
934 GNUNET_break (NULL != papi);
940 * Master task run for every neighbour. Performs all of the time-related
941 * activities (keep alive, send next message, disconnect if idle, finish
942 * clean up after disconnect).
944 * @param cls the `struct NeighbourMapEntry` for which we are running
945 * @param tc scheduler context (unused)
948 master_task (void *cls,
949 const struct GNUNET_SCHEDULER_TaskContext *tc);
953 * Function called when the 'DISCONNECT' message has been sent by the
954 * plugin. Frees the neighbour --- if the entry still exists.
957 * @param target identity of the neighbour that was disconnected
958 * @param result #GNUNET_OK if the disconnect got out successfully
959 * @param payload bytes payload
960 * @param physical bytes physical
963 send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
964 int result, size_t payload, size_t physical)
966 struct NeighbourMapEntry *n;
968 n = lookup_neighbour (target);
970 return; /* already gone */
971 if (GNUNET_TRANSPORT_DISCONNECT != n->state)
972 return; /* have created a fresh entry since */
973 if (GNUNET_SCHEDULER_NO_TASK != n->task)
974 GNUNET_SCHEDULER_cancel (n->task);
975 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
980 * Transmit a DISCONNECT message to the other peer.
982 * @param n neighbour to send DISCONNECT message.
985 send_disconnect (struct NeighbourMapEntry *n)
987 struct SessionDisconnectMessage disconnect_msg;
989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
990 "Sending DISCONNECT message to peer `%4s'\n",
991 GNUNET_i2s (&n->id));
992 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
993 disconnect_msg.header.type =
994 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
995 disconnect_msg.reserved = htonl (0);
996 disconnect_msg.purpose.size =
997 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
998 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
999 sizeof (struct GNUNET_TIME_AbsoluteNBO));
1000 disconnect_msg.purpose.purpose =
1001 htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1002 disconnect_msg.timestamp =
1003 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1004 disconnect_msg.public_key = GST_my_identity.public_key;
1005 GNUNET_assert (GNUNET_OK ==
1006 GNUNET_CRYPTO_eddsa_sign (GST_my_private_key,
1007 &disconnect_msg.purpose,
1008 &disconnect_msg.signature));
1010 (void) send_with_session (n,
1011 (const char *) &disconnect_msg, sizeof (disconnect_msg),
1012 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1013 GNUNET_NO, &send_disconnect_cont, NULL);
1014 GNUNET_STATISTICS_update (GST_stats,
1016 ("# DISCONNECT messages sent"), 1,
1022 * Disconnect from the given neighbour, clean up the record.
1024 * @param n neighbour to disconnect from
1027 disconnect_neighbour (struct NeighbourMapEntry *n)
1029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1030 "Disconnecting from peer %s in state %s\n",
1031 GNUNET_i2s (&n->id),
1032 GNUNET_TRANSPORT_p2s (n->state));
1033 /* depending on state, notify neighbour and/or upper layers of this peer
1037 case GNUNET_TRANSPORT_NOT_CONNECTED:
1038 case GNUNET_TRANSPORT_INIT_ATS:
1039 case GNUNET_TRANSPORT_INIT_BLACKLIST:
1040 /* other peer is completely unaware of us, no need to send DISCONNECT */
1041 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
1042 free_neighbour (n, GNUNET_NO);
1044 case GNUNET_TRANSPORT_CONNECT_SENT:
1045 send_disconnect (n);
1046 set_state (n, GNUNET_TRANSPORT_DISCONNECT);
1048 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
1049 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
1050 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
1051 /* we never ACK'ed the other peer's request, no need to send DISCONNECT */
1052 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
1053 free_neighbour (n, GNUNET_NO);
1055 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
1056 /* we DID ACK the other peer's request, must send DISCONNECT */
1057 send_disconnect (n);
1058 set_state (n, GNUNET_TRANSPORT_DISCONNECT);
1060 case GNUNET_TRANSPORT_CONNECTED:
1061 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
1062 case GNUNET_TRANSPORT_RECONNECT_SENT:
1063 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
1064 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
1065 /* we are currently connected, need to send disconnect and do
1066 internal notifications and update statistics */
1067 send_disconnect (n);
1068 GNUNET_STATISTICS_set (GST_stats,
1069 gettext_noop ("# peers connected"),
1070 --neighbours_connected,
1072 disconnect_notify_cb (callback_cls, &n->id);
1073 set_state (n, GNUNET_TRANSPORT_DISCONNECT);
1075 case GNUNET_TRANSPORT_RECONNECT_ATS:
1076 /* ATS address request timeout, disconnect without sending disconnect message */
1077 GNUNET_STATISTICS_set (GST_stats,
1078 gettext_noop ("# peers connected"),
1079 --neighbours_connected,
1081 disconnect_notify_cb (callback_cls, &n->id);
1082 set_state (n, GNUNET_TRANSPORT_DISCONNECT);
1084 case GNUNET_TRANSPORT_DISCONNECT:
1085 /* already disconnected, ignore */
1087 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
1088 /* already cleaned up, how did we get here!? */
1092 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1093 "Unhandled state `%s'\n",
1094 GNUNET_TRANSPORT_p2s (n->state));
1098 /* schedule timeout to clean up */
1099 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1100 GNUNET_SCHEDULER_cancel (n->task);
1101 n->task = GNUNET_SCHEDULER_add_delayed (DISCONNECT_SENT_TIMEOUT,
1107 * We're done with our transmission attempt, continue processing.
1109 * @param cls the `struct MessageQueue` of the message
1110 * @param receiver intended receiver
1111 * @param success whether it worked or not
1112 * @param size_payload bytes payload sent
1113 * @param physical bytes sent on wire
1116 transmit_send_continuation (void *cls,
1117 const struct GNUNET_PeerIdentity *receiver,
1118 int success, size_t size_payload, size_t physical)
1120 struct MessageQueue *mq = cls;
1121 struct NeighbourMapEntry *n;
1123 if (NULL == (n = lookup_neighbour (receiver)))
1126 return; /* disconnect or other error while transmitting, can happen */
1128 if (n->is_active == mq)
1130 /* this is still "our" neighbour, remove us from its queue
1131 and allow it to send the next message now */
1132 n->is_active = NULL;
1133 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1134 GNUNET_SCHEDULER_cancel (n->task);
1135 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1137 if (bytes_in_send_queue < mq->message_buf_size)
1139 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1140 "Bytes_in_send_queue `%u', Message_size %u, result: %s, payload %u, on wire %u\n",
1141 bytes_in_send_queue, mq->message_buf_size,
1142 (GNUNET_OK == success) ? "OK" : "FAIL",
1143 size_payload, physical);
1148 GNUNET_break (size_payload == mq->message_buf_size);
1149 bytes_in_send_queue -= mq->message_buf_size;
1150 GNUNET_STATISTICS_set (GST_stats,
1152 ("# bytes in message queue for other peers"),
1153 bytes_in_send_queue, GNUNET_NO);
1154 if (GNUNET_OK == success)
1155 GNUNET_STATISTICS_update (GST_stats,
1157 ("# messages transmitted to other peers"),
1160 GNUNET_STATISTICS_update (GST_stats,
1162 ("# transmission failures for messages to other peers"),
1164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1165 "Sending message to `%s' of type %u was a %s\n",
1166 GNUNET_i2s (receiver),
1167 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
1168 (success == GNUNET_OK) ? "success" : "FAILURE");
1169 if (NULL != mq->cont)
1170 mq->cont (mq->cont_cls, success, size_payload, physical);
1176 * Check the message list for the given neighbour and if we can
1177 * send a message, do so. This function should only be called
1178 * if the connection is at least generally ready for transmission.
1179 * While we will only send one message at a time, no bandwidth
1180 * quota management is performed here. If a message was given to
1181 * the plugin, the continuation will automatically re-schedule
1182 * the 'master' task once the next message might be transmitted.
1184 * @param n target peer for which to transmit
1187 try_transmission_to_peer (struct NeighbourMapEntry *n)
1189 struct MessageQueue *mq;
1190 struct GNUNET_TIME_Relative timeout;
1192 if (NULL == n->primary_address.address)
1194 /* no address, why are we here? */
1198 if ((0 == n->primary_address.address->address_length) &&
1199 (NULL == n->primary_address.session))
1201 /* no address, why are we here? */
1205 if (NULL != n->is_active)
1207 /* transmission already pending */
1211 /* timeout messages from the queue that are past their due date */
1212 while (NULL != (mq = n->messages_head))
1214 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1215 if (timeout.rel_value_us > 0)
1217 GNUNET_STATISTICS_update (GST_stats,
1219 ("# messages timed out while in transport queue"),
1221 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1223 transmit_send_continuation (mq, &n->id,
1225 mq->message_buf_size, 0); /* timeout */
1228 return; /* no more messages */
1229 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1231 (void) send_with_session (n,
1232 mq->message_buf, mq->message_buf_size,
1233 0 /* priority */, timeout, GNUNET_NO,
1234 &transmit_send_continuation, mq);
1239 * Send keepalive message to the neighbour. Must only be called
1240 * if we are on 'connected' state or while trying to switch addresses.
1241 * Will internally determine if a keepalive is truly needed (so can
1242 * always be called).
1244 * @param n neighbour that went idle and needs a keepalive
1247 send_keepalive (struct NeighbourMapEntry *n)
1249 struct SessionKeepAliveMessage m;
1250 struct GNUNET_TIME_Relative timeout;
1253 GNUNET_assert ((GNUNET_TRANSPORT_CONNECTED == n->state) ||
1254 (GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
1255 (GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT));
1256 if (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time).rel_value_us > 0)
1257 return; /* no keepalive needed at this time */
1259 nonce = 0; /* 0 indicates 'not set' */
1261 nonce = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
1263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1264 "Sending keep alive to peer `%s' with nonce %u\n",
1265 GNUNET_i2s (&n->id), nonce);
1267 m.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1268 m.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
1269 m.nonce = htonl (nonce);
1271 timeout = send_with_session (n,
1272 (const void *) &m, sizeof (m),
1273 UINT32_MAX /* priority */,
1274 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1276 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
1278 n->primary_address.keep_alive_nonce = nonce;
1279 n->expect_latency_response = GNUNET_YES;
1280 n->last_keep_alive_time = GNUNET_TIME_absolute_get ();
1281 n->keep_alive_time = GNUNET_TIME_relative_to_absolute (timeout);
1287 * Keep the connection to the given neighbour alive longer,
1288 * we received a KEEPALIVE (or equivalent); send a response.
1290 * @param neighbour neighbour to keep alive (by sending keep alive response)
1291 * @param m the keep alive message containing the nonce to respond to
1294 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
1295 const struct GNUNET_MessageHeader *m)
1297 struct NeighbourMapEntry *n;
1298 const struct SessionKeepAliveMessage *msg_in;
1299 struct SessionKeepAliveMessage msg;
1301 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1304 msg_in = (struct SessionKeepAliveMessage *) m;
1305 if (NULL == (n = lookup_neighbour (neighbour)))
1307 GNUNET_STATISTICS_update (GST_stats,
1309 ("# KEEPALIVE messages discarded (peer unknown)"),
1313 if (NULL == n->primary_address.session)
1315 GNUNET_STATISTICS_update (GST_stats,
1317 ("# KEEPALIVE messages discarded (no session)"),
1322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1323 "Received keep alive request from peer `%s' with nonce %u\n",
1324 GNUNET_i2s (&n->id), ntohl (msg_in->nonce));
1326 /* send reply to allow neighbour to measure latency */
1327 msg.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1328 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE);
1329 msg.nonce = msg_in->nonce;
1330 (void) send_with_session(n,
1331 (const void *) &msg, sizeof (struct SessionKeepAliveMessage),
1332 UINT32_MAX /* priority */,
1333 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1339 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
1340 * latency to this peer. Pass the updated information (existing ats
1341 * plus calculated latency) to ATS.
1343 * @param neighbour neighbour to keep alive
1344 * @param m the message containing the keep alive response
1347 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
1348 const struct GNUNET_MessageHeader *m)
1350 struct NeighbourMapEntry *n;
1351 const struct SessionKeepAliveMessage *msg;
1352 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1354 struct GNUNET_ATS_Information ats;
1356 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1359 msg = (const struct SessionKeepAliveMessage *) m;
1360 if (NULL == (n = lookup_neighbour (neighbour)))
1362 GNUNET_STATISTICS_update (GST_stats,
1364 ("# KEEPALIVE_RESPONSE messages discarded (not connected)"),
1368 if ( (GNUNET_TRANSPORT_CONNECTED != n->state) ||
1369 (GNUNET_YES != n->expect_latency_response) )
1371 GNUNET_STATISTICS_update (GST_stats,
1373 ("# KEEPALIVE_RESPONSE messages discarded (not expected)"),
1377 if (NULL == n->primary_address.address)
1379 GNUNET_STATISTICS_update (GST_stats,
1381 ("# KEEPALIVE_RESPONSE messages discarded (address changed)"),
1385 if (n->primary_address.keep_alive_nonce != ntohl (msg->nonce))
1387 GNUNET_STATISTICS_update (GST_stats,
1389 ("# KEEPALIVE_RESPONSE messages discarded (wrong nonce)"),
1395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1396 "Received keep alive response from peer `%s' for session %p\n",
1397 GNUNET_i2s (&n->id), n->primary_address.session);
1401 /* Update session timeout here */
1402 if (NULL != (papi = GST_plugins_find (n->primary_address.address->transport_name)))
1404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1405 "Updating session for peer `%s' for session %p\n",
1406 GNUNET_i2s (&n->id), n->primary_address.session);
1407 papi->update_session_timeout (papi->cls, &n->id, n->primary_address.session);
1414 n->primary_address.keep_alive_nonce = 0;
1415 n->expect_latency_response = GNUNET_NO;
1416 n->latency = GNUNET_TIME_absolute_get_duration (n->last_keep_alive_time);
1417 set_timeout (n, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1420 "Latency for peer `%s' is %s\n",
1421 GNUNET_i2s (&n->id),
1422 GNUNET_STRINGS_relative_time_to_string (n->latency,
1424 /* append latency */
1425 ats.type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
1426 if (n->latency.rel_value_us > UINT32_MAX)
1427 latency = UINT32_MAX;
1429 latency = n->latency.rel_value_us;
1430 ats.value = htonl (latency);
1431 GST_ats_update_metrics (&n->id, n->primary_address.address,
1432 n->primary_address.session, &ats, 1);
1437 * We have received a message from the given sender. How long should
1438 * we delay before receiving more? (Also used to keep the peer marked
1441 * @param sender sender of the message
1442 * @param size size of the message
1443 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
1444 * #GNUNET_NO if the neighbour is not connected or violates the quota,
1445 * #GNUNET_SYSERR if the connection is not fully up yet
1446 * @return how long to wait before reading more from this sender
1448 struct GNUNET_TIME_Relative
1449 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1450 *sender, ssize_t size, int *do_forward)
1452 struct NeighbourMapEntry *n;
1453 struct GNUNET_TIME_Relative ret;
1455 if (NULL == neighbours)
1457 *do_forward = GNUNET_NO;
1458 return GNUNET_TIME_UNIT_FOREVER_REL; /* This can happen during shutdown */
1460 if (NULL == (n = lookup_neighbour (sender)))
1462 GST_neighbours_try_connect (sender);
1463 if (NULL == (n = lookup_neighbour (sender)))
1465 GNUNET_STATISTICS_update (GST_stats,
1467 ("# messages discarded due to lack of neighbour record"),
1469 *do_forward = GNUNET_NO;
1470 return GNUNET_TIME_UNIT_ZERO;
1473 if (! test_connected (n))
1475 *do_forward = GNUNET_SYSERR;
1476 return GNUNET_TIME_UNIT_ZERO;
1478 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1480 n->quota_violation_count++;
1481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1482 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1483 n->in_tracker.available_bytes_per_s__,
1484 n->quota_violation_count);
1485 /* Discount 32k per violation */
1486 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1490 if (n->quota_violation_count > 0)
1492 /* try to add 32k back */
1493 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1494 n->quota_violation_count--;
1497 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1499 GNUNET_STATISTICS_update (GST_stats,
1501 ("# bandwidth quota violations by other peers"),
1503 *do_forward = GNUNET_NO;
1504 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1506 *do_forward = GNUNET_YES;
1507 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1508 if (ret.rel_value_us > 0)
1510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1511 "Throttling read (%llu bytes excess at %u b/s), waiting %s before reading more.\n",
1512 (unsigned long long) n->in_tracker.
1513 consumption_since_last_update__,
1514 (unsigned int) n->in_tracker.available_bytes_per_s__,
1515 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
1516 GNUNET_STATISTICS_update (GST_stats,
1517 gettext_noop ("# ms throttling suggested"),
1518 (int64_t) ret.rel_value_us / 1000LL,
1526 * Transmit a message to the given target using the active connection.
1528 * @param target destination
1529 * @param msg message to send
1530 * @param msg_size number of bytes in msg
1531 * @param timeout when to fail with timeout
1532 * @param cont function to call when done
1533 * @param cont_cls closure for 'cont'
1536 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1537 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1538 GST_NeighbourSendContinuation cont, void *cont_cls)
1540 struct NeighbourMapEntry *n;
1541 struct MessageQueue *mq;
1543 /* All ove these cases should never happen; they are all API violations.
1544 But we check anyway, just to be sure. */
1545 if (NULL == (n = lookup_neighbour (target)))
1549 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1552 if (GNUNET_YES != test_connected (n))
1556 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1559 bytes_in_send_queue += msg_size;
1560 GNUNET_STATISTICS_set (GST_stats,
1562 ("# bytes in message queue for other peers"),
1563 bytes_in_send_queue, GNUNET_NO);
1564 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1566 mq->cont_cls = cont_cls;
1567 memcpy (&mq[1], msg, msg_size);
1568 mq->message_buf = (const char *) &mq[1];
1569 mq->message_buf_size = msg_size;
1570 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1571 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1572 if ( (NULL != n->is_active) ||
1573 ( (NULL == n->primary_address.session) && (NULL == n->primary_address.address)) )
1575 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1576 GNUNET_SCHEDULER_cancel (n->task);
1577 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1582 * Send a SESSION_CONNECT message via the given address.
1584 * @param na address to use
1587 send_session_connect (struct NeighbourAddress *na)
1589 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1590 struct SessionConnectMessage connect_msg;
1592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1593 "Sending SESSION_CONNECT message to peer %s\n",
1594 GNUNET_i2s (&na->address->peer));
1595 if (NULL == (papi = GST_plugins_find (na->address->transport_name)))
1600 if (NULL == na->session)
1601 na->session = papi->get_session (papi->cls, na->address);
1602 if (NULL == na->session)
1607 GNUNET_STATISTICS_update (GST_stats,
1609 ("# SESSION_CONNECT messages sent"),
1611 na->connect_timestamp = GNUNET_TIME_absolute_get ();
1612 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1613 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1614 connect_msg.reserved = htonl (0);
1615 connect_msg.timestamp = GNUNET_TIME_absolute_hton (na->connect_timestamp);
1617 papi->send (papi->cls,
1619 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1621 GNUNET_TIME_UNIT_FOREVER_REL,
1624 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1625 _("Failed to transmit CONNECT message via plugin to %s\n"),
1626 GST_plugins_a2s (na->address));
1628 GST_neighbours_notify_data_sent (&na->address->peer,
1631 sizeof (struct SessionConnectMessage));
1637 * Send a SESSION_CONNECT_ACK message via the given address.
1639 * @param address address to use
1640 * @param session session to use
1641 * @param timestamp timestamp to use for the ACK message
1644 send_session_connect_ack_message (const struct GNUNET_HELLO_Address *address,
1645 struct Session *session,
1646 struct GNUNET_TIME_Absolute timestamp)
1648 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1649 struct SessionConnectMessage connect_msg;
1651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1652 "Sending CONNECT_ACK to peer `%s'\n",
1653 GNUNET_i2s (&address->peer));
1654 if (NULL == (papi = GST_plugins_find (address->transport_name)))
1659 if (NULL == session)
1660 session = papi->get_session (papi->cls, address);
1661 if (NULL == session)
1666 GNUNET_STATISTICS_update (GST_stats,
1668 ("# CONNECT_ACK messages sent"),
1670 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1671 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1672 connect_msg.reserved = htonl (0);
1673 connect_msg.timestamp = GNUNET_TIME_absolute_hton (timestamp);
1674 (void) papi->send (papi->cls,
1676 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1678 GNUNET_TIME_UNIT_FOREVER_REL,
1685 * Create a fresh entry in the neighbour map for the given peer
1687 * @param peer peer to create an entry for
1688 * @return new neighbour map entry
1690 static struct NeighbourMapEntry *
1691 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
1693 struct NeighbourMapEntry *n;
1695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1696 "Creating new neighbour entry for `%s'\n",
1698 n = GNUNET_new (struct NeighbourMapEntry);
1700 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
1701 n->last_util_transmission = GNUNET_TIME_absolute_get();
1702 n->util_payload_bytes_recv = 0;
1703 n->util_payload_bytes_sent = 0;
1704 n->util_total_bytes_recv = 0;
1705 n->util_total_bytes_sent = 0;
1706 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
1707 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
1708 MAX_BANDWIDTH_CARRY_S);
1709 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1710 set_state_and_timeout (n, GNUNET_TRANSPORT_NOT_CONNECTED, GNUNET_TIME_UNIT_FOREVER_ABS);
1711 GNUNET_assert (GNUNET_OK ==
1712 GNUNET_CONTAINER_multipeermap_put (neighbours,
1714 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1720 * Check if the two given addresses are the same.
1721 * Actually only checks if the sessions are non-NULL
1722 * (which they should be) and then if they are identical;
1723 * the actual addresses don't matter if the session
1724 * pointers match anyway, and we must have session pointers
1727 * @param a1 first address to compare
1728 * @param a2 other address to compare
1729 * @return #GNUNET_NO if the addresses do not match, #GNUNET_YES if they do match
1732 address_matches (const struct NeighbourAddress *a1,
1733 const struct NeighbourAddress *a2)
1735 if ( (NULL == a1->session) ||
1736 (NULL == a2->session) )
1741 return (a1->session == a2->session) ? GNUNET_YES : GNUNET_NO;
1746 address_suggest_cont (void *cls,
1747 const struct GNUNET_PeerIdentity *peer,
1748 const struct GNUNET_HELLO_Address *address, struct Session *session,
1749 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1750 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1751 const struct GNUNET_ATS_Information *ats, uint32_t ats_count)
1758 * Try to create a connection to the given target (eventually).
1760 * @param target peer to try to connect to
1763 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
1765 struct NeighbourMapEntry *n;
1767 if (NULL == neighbours)
1769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1770 "Asked to connect to peer `%s' during shutdown\n",
1771 GNUNET_i2s (target));
1772 return; /* during shutdown, do nothing */
1774 n = lookup_neighbour (target);
1775 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1776 "Asked to connect to peer `%s' (state: %s)\n",
1777 GNUNET_i2s (target),
1778 (NULL != n) ? GNUNET_TRANSPORT_p2s(n->state) : "NEW PEER");
1783 case GNUNET_TRANSPORT_NOT_CONNECTED:
1784 /* this should not be possible */
1786 free_neighbour (n, GNUNET_NO);
1788 case GNUNET_TRANSPORT_INIT_ATS:
1789 case GNUNET_TRANSPORT_INIT_BLACKLIST:
1790 case GNUNET_TRANSPORT_CONNECT_SENT:
1791 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
1792 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
1793 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
1794 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
1795 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1796 "Ignoring request to try to connect to `%s', already trying!\n",
1797 GNUNET_i2s (target));
1798 return; /* already trying */
1799 case GNUNET_TRANSPORT_CONNECTED:
1800 case GNUNET_TRANSPORT_RECONNECT_ATS:
1801 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
1802 case GNUNET_TRANSPORT_RECONNECT_SENT:
1803 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
1804 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
1805 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1806 "Ignoring request to try to connect, already connected to `%s'!\n",
1807 GNUNET_i2s (target));
1808 return; /* already connected */
1809 case GNUNET_TRANSPORT_DISCONNECT:
1810 /* get rid of remains, ready to re-try immediately */
1811 free_neighbour (n, GNUNET_NO);
1813 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
1814 /* should not be possible */
1817 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1818 "Unhandled state `%s'\n",
1819 GNUNET_TRANSPORT_p2s (n->state));
1821 free_neighbour (n, GNUNET_NO);
1825 n = setup_neighbour (target);
1826 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1828 GNUNET_ATS_reset_backoff (GST_ats, target);
1829 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, target, &address_suggest_cont, n);
1834 * Function called with the result of a blacklist check.
1836 * @param cls closure with the `struct BlackListCheckContext`
1837 * @param peer peer this check affects
1838 * @param result #GNUNET_OK if the address is allowed
1841 handle_test_blacklist_cont (void *cls,
1842 const struct GNUNET_PeerIdentity *peer,
1845 struct BlackListCheckContext *bcc = cls;
1846 struct NeighbourMapEntry *n;
1849 GNUNET_CONTAINER_DLL_remove (bc_head,
1852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1853 "Connection to new address of peer `%s' based on blacklist is `%s'\n",
1855 (GNUNET_OK == result) ? "allowed" : "FORBIDDEN");
1856 if (GNUNET_OK == result)
1858 GST_ats_add_address (bcc->na.address, bcc->na.session, NULL, 0);
1862 /* Blacklist disagreed on connecting to a peer with this address
1863 * Destroy address because we are not allowed to use it
1865 if (NULL != bcc->na.session)
1866 GNUNET_ATS_address_destroyed (GST_ats, bcc->na.address, bcc->na.session);
1867 GNUNET_ATS_address_destroyed (GST_ats, bcc->na.address, NULL);
1869 if (NULL == (n = lookup_neighbour (peer)))
1871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1872 "No neighbor entry for peer `%s', ignoring blacklist result\n",
1874 goto cleanup; /* nobody left to care about new address */
1876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1877 "Received blacklist result for peer `%s' in state %s/%d\n",
1879 GNUNET_TRANSPORT_p2s (n->state),
1880 n->send_connect_ack);
1883 case GNUNET_TRANSPORT_NOT_CONNECTED:
1884 /* this should not be possible */
1886 free_neighbour (n, GNUNET_NO);
1888 case GNUNET_TRANSPORT_INIT_ATS:
1889 /* waiting on ATS suggestion; still, pass address to ATS as a
1892 case GNUNET_TRANSPORT_INIT_BLACKLIST:
1893 /* check if the address the blacklist was fine with matches
1894 ATS suggestion, if so, we can move on! */
1895 if ( (GNUNET_OK == result) &&
1896 (1 == n->send_connect_ack) )
1898 n->send_connect_ack = 2;
1899 send_session_connect_ack_message (bcc->na.address,
1901 n->connect_ack_timestamp);
1903 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
1905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1906 "Blacklist result for peer %s is for non-primary address, ignored\n",
1908 break; /* result for an address we currently don't care about */
1910 if (GNUNET_OK == result)
1912 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECT_SENT, GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
1913 send_session_connect (&n->primary_address);
1917 free_address (&n->primary_address);
1918 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1921 case GNUNET_TRANSPORT_CONNECT_SENT:
1922 /* waiting on CONNECT_ACK, send ACK if one is pending */
1923 if ( (GNUNET_OK == result) &&
1924 (1 == n->send_connect_ack) )
1926 n->send_connect_ack = 2;
1927 send_session_connect_ack_message (n->primary_address.address,
1928 n->primary_address.session,
1929 n->connect_ack_timestamp);
1932 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
1933 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECT_RECV_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1934 GNUNET_ATS_reset_backoff (GST_ats, peer);
1935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1936 "Suggesting address for peer %s to ATS\n",
1938 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer, &address_suggest_cont, n);
1940 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
1941 /* waiting on ATS suggestion, don't care about blacklist */
1943 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
1944 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
1946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1947 "Blacklist result ignored, as it is not for our primary address\n");
1948 break; /* result for an address we currently don't care about */
1950 if (GNUNET_OK == result)
1952 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECT_RECV_ACK, GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
1953 send_session_connect_ack_message (bcc->na.address,
1955 n->connect_ack_timestamp);
1956 if (1 == n->send_connect_ack)
1957 n->send_connect_ack = 2;
1961 struct GNUNET_TRANSPORT_PluginFunctions *plugin;
1963 plugin = GST_plugins_find (bcc->na.address->transport_name);
1964 if ( (NULL != plugin) &&
1965 (NULL != bcc->na.session) )
1967 plugin->disconnect_session (plugin->cls,
1971 GNUNET_break (NULL != plugin);
1972 free_address (&n->primary_address);
1973 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1974 GNUNET_ATS_reset_backoff (GST_ats, peer);
1977 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
1978 /* waiting on SESSION_ACK, send ACK if one is pending */
1979 if ( (GNUNET_OK == result) &&
1980 (1 == n->send_connect_ack) )
1982 n->send_connect_ack = 2;
1983 send_session_connect_ack_message (n->primary_address.address,
1984 n->primary_address.session,
1985 n->connect_ack_timestamp);
1988 case GNUNET_TRANSPORT_CONNECTED:
1989 /* already connected, don't care about blacklist */
1991 case GNUNET_TRANSPORT_RECONNECT_ATS:
1992 /* still waiting on ATS suggestion, don't care about blacklist */
1994 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
1995 if ( (GNUNET_OK == result) &&
1996 (1 == n->send_connect_ack) )
1998 n->send_connect_ack = 2;
1999 send_session_connect_ack_message (bcc->na.address,
2001 n->connect_ack_timestamp);
2003 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2006 "Blacklist result ignored, as it is not for our primary address\n");
2007 break; /* result for an address we currently don't care about */
2009 if (GNUNET_OK == result)
2011 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_SENT, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2012 send_session_connect (&n->primary_address);
2016 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2019 case GNUNET_TRANSPORT_RECONNECT_SENT:
2020 /* waiting on CONNECT_ACK, don't care about blacklist */
2021 if ( (GNUNET_OK == result) &&
2022 (1 == n->send_connect_ack) )
2024 n->send_connect_ack = 2;
2025 send_session_connect_ack_message (n->primary_address.address,
2026 n->primary_address.session,
2027 n->connect_ack_timestamp);
2030 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
2031 if (GNUNET_YES != address_matches (&bcc->na, &n->alternative_address))
2033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2034 "Blacklist result ignored, as it is not for our primary address\n");
2035 break; /* result for an address we currently don't care about */
2037 if (GNUNET_OK == result)
2039 send_session_connect (&n->alternative_address);
2040 set_state (n, GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT);
2044 set_state(n, GNUNET_TRANSPORT_CONNECTED);
2045 free_address (&n->alternative_address);
2048 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
2049 /* waiting on CONNECT_ACK, don't care about blacklist */
2050 if ( (GNUNET_OK == result) &&
2051 (1 == n->send_connect_ack) )
2053 n->send_connect_ack = 2;
2054 send_session_connect_ack_message (n->primary_address.address,
2055 n->primary_address.session,
2056 n->connect_ack_timestamp);
2059 case GNUNET_TRANSPORT_DISCONNECT:
2060 /* Nothing to do here, ATS will already do what can be done */
2062 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
2063 /* should not be possible */
2067 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2068 "Unhandled state `%s'\n",
2069 GNUNET_TRANSPORT_p2s (n->state));
2071 free_neighbour (n, GNUNET_NO);
2075 GNUNET_HELLO_address_free (bcc->na.address);
2081 * We want to know if connecting to a particular peer via
2082 * a particular address is allowed. Check it!
2084 * @param peer identity of the peer to switch the address for
2085 * @param ts time at which the check was initiated
2086 * @param address address of the other peer, NULL if other peer
2088 * @param session session to use (or NULL)
2091 check_blacklist (const struct GNUNET_PeerIdentity *peer,
2092 struct GNUNET_TIME_Absolute ts,
2093 const struct GNUNET_HELLO_Address *address,
2094 struct Session *session)
2096 struct BlackListCheckContext *bcc;
2097 struct GST_BlacklistCheck *bc;
2099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2100 "Checking peer `%s' against blacklist\n",
2102 bcc = GNUNET_new (struct BlackListCheckContext);
2103 bcc->na.address = GNUNET_HELLO_address_copy (address);
2104 bcc->na.session = session;
2105 bcc->na.connect_timestamp = ts;
2106 GNUNET_CONTAINER_DLL_insert (bc_head,
2109 if (NULL != (bc = GST_blacklist_test_allowed (peer,
2110 address->transport_name,
2111 &handle_test_blacklist_cont, bcc)))
2113 /* if NULL == bc, 'cont' was already called and 'bcc' already free'd, so
2114 we must only store 'bc' if 'bc' is non-NULL... */
2119 * We received a 'SESSION_CONNECT' message from the other peer.
2120 * Consider switching to it.
2122 * @param message possibly a 'struct SessionConnectMessage' (check format)
2123 * @param peer identity of the peer to switch the address for
2124 * @param address address of the other peer, NULL if other peer
2126 * @param session session to use (or NULL)
2127 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
2130 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2131 const struct GNUNET_PeerIdentity *peer,
2132 const struct GNUNET_HELLO_Address *address,
2133 struct Session *session)
2135 const struct SessionConnectMessage *scm;
2136 struct NeighbourMapEntry *n;
2137 struct GNUNET_TIME_Absolute ts;
2139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2140 "Received CONNECT message from peer `%s'\n",
2142 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2144 GNUNET_break_op (0);
2145 return GNUNET_SYSERR;
2147 GNUNET_STATISTICS_update (GST_stats,
2149 ("# CONNECT messages received"),
2151 if (NULL == neighbours)
2153 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2154 _("CONNECT request from peer `%s' ignored due impending shutdown\n"),
2156 return GNUNET_OK; /* we're shutting down */
2158 scm = (const struct SessionConnectMessage *) message;
2159 GNUNET_break_op (0 == ntohl (scm->reserved));
2160 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2161 n = lookup_neighbour (peer);
2163 n = setup_neighbour (peer);
2164 n->send_connect_ack = 1;
2165 n->connect_ack_timestamp = ts;
2167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2168 "Received SESSION_CONNECT for peer `%s' in state %s/%d\n",
2170 GNUNET_TRANSPORT_p2s (n->state),
2171 n->send_connect_ack);
2174 case GNUNET_TRANSPORT_NOT_CONNECTED:
2175 /* Do a blacklist check for the new address */
2176 set_state (n, GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND);
2177 check_blacklist (peer, ts, address, session);
2179 case GNUNET_TRANSPORT_INIT_ATS:
2180 /* CONNECT message takes priority over us asking ATS for address */
2181 set_state (n, GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND);
2183 case GNUNET_TRANSPORT_INIT_BLACKLIST:
2184 case GNUNET_TRANSPORT_CONNECT_SENT:
2185 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
2186 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
2187 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
2188 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
2189 /* It can never hurt to have an alternative address in the above cases,
2190 see if it is allowed */
2191 check_blacklist (peer, ts, address, session);
2193 case GNUNET_TRANSPORT_CONNECTED:
2194 /* we are already connected and can thus send the ACK immediately;
2195 still, it can never hurt to have an alternative address, so also
2196 tell ATS about it */
2197 GNUNET_assert (NULL != n->primary_address.address);
2198 GNUNET_assert (NULL != n->primary_address.session);
2199 n->send_connect_ack = 0;
2200 send_session_connect_ack_message (n->primary_address.address,
2201 n->primary_address.session, ts);
2202 check_blacklist (peer, ts, address, session);
2204 case GNUNET_TRANSPORT_RECONNECT_ATS:
2205 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
2206 case GNUNET_TRANSPORT_RECONNECT_SENT:
2207 /* It can never hurt to have an alternative address in the above cases,
2208 see if it is allowed */
2209 check_blacklist (peer, ts, address, session);
2211 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
2212 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
2213 /* we are already connected and can thus send the ACK immediately;
2214 still, it can never hurt to have an alternative address, so also
2215 tell ATS about it */
2216 GNUNET_assert (NULL != n->primary_address.address);
2217 GNUNET_assert (NULL != n->primary_address.session);
2218 n->send_connect_ack = 0;
2219 send_session_connect_ack_message (n->primary_address.address,
2220 n->primary_address.session, ts);
2221 check_blacklist (peer, ts, address, session);
2223 case GNUNET_TRANSPORT_DISCONNECT:
2224 /* get rid of remains without terminating sessions, ready to re-try */
2225 free_neighbour (n, GNUNET_YES);
2226 n = setup_neighbour (peer);
2227 set_state (n, GNUNET_TRANSPORT_CONNECT_RECV_ATS);
2228 GNUNET_ATS_reset_backoff (GST_ats, peer);
2230 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
2231 /* should not be possible */
2235 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2236 "Unhandled state `%s'\n",
2237 GNUNET_TRANSPORT_p2s (n->state));
2239 return GNUNET_SYSERR;
2246 * For an existing neighbour record, set the active connection to
2247 * use the given address.
2249 * @param peer identity of the peer to switch the address for
2250 * @param address address of the other peer, NULL if other peer
2252 * @param session session to use (or NULL)
2253 * @param ats performance data
2254 * @param ats_count number of entries in ats
2255 * @param bandwidth_in inbound quota to be used when connection is up,
2256 * 0 to disconnect from peer
2257 * @param bandwidth_out outbound quota to be used when connection is up,
2258 * 0 to disconnect from peer
2261 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
2262 const struct GNUNET_HELLO_Address *address,
2263 struct Session *session,
2264 const struct GNUNET_ATS_Information *ats,
2266 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
2267 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
2269 struct NeighbourMapEntry *n;
2270 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2273 "ATS has decided on an address for peer %s\n",
2275 GNUNET_assert (NULL != address->transport_name);
2276 if (NULL == (n = lookup_neighbour (peer)))
2278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2279 "Peer %s is unknown, suggestion ignored\n",
2284 /* Obtain an session for this address from plugin */
2285 if (NULL == (papi = GST_plugins_find (address->transport_name)))
2287 /* we don't have the plugin for this address */
2288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2289 "Plugin `%s' is unknown, suggestion for peer %s ignored\n",
2290 address->transport_name,
2292 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2295 if ((NULL == session) && (0 == address->address_length))
2298 if (strlen (address->transport_name) > 0)
2299 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2304 "ATS tells us to switch to address '%s/%s' session %p for "
2305 "peer `%s' in state %s/%d (quota in/out %u %u )\n",
2306 (address->address_length != 0) ? GST_plugins_a2s (address): "<inbound>",
2307 address->transport_name,
2310 GNUNET_TRANSPORT_p2s (n->state),
2311 n->send_connect_ack,
2312 ntohl (bandwidth_in.value__),
2313 ntohl (bandwidth_out.value__));
2315 if (NULL == session)
2317 session = papi->get_session (papi->cls, address);
2318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2319 "Obtained new session for peer `%s' and address '%s': %p\n",
2320 GNUNET_i2s (&address->peer), GST_plugins_a2s (address), session);
2322 if (NULL == session)
2324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2325 "Failed to obtain new session for peer `%s' and address '%s'\n",
2326 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
2327 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2332 case GNUNET_TRANSPORT_NOT_CONNECTED:
2334 free_neighbour (n, GNUNET_NO);
2336 case GNUNET_TRANSPORT_INIT_ATS:
2337 set_primary_address (n, address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2338 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2339 check_blacklist (&n->id,
2340 n->connect_ack_timestamp,
2343 case GNUNET_TRANSPORT_INIT_BLACKLIST:
2344 /* ATS suggests a different address, switch again */
2345 set_primary_address (n,
2346 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2347 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2348 check_blacklist (&n->id,
2349 n->connect_ack_timestamp,
2352 case GNUNET_TRANSPORT_CONNECT_SENT:
2353 /* ATS suggests a different address, switch again */
2354 set_primary_address (n, address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2355 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2356 check_blacklist (&n->id,
2357 n->connect_ack_timestamp,
2360 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
2361 set_primary_address (n,
2362 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2363 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2364 check_blacklist (&n->id,
2365 n->connect_ack_timestamp,
2368 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
2369 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2370 check_blacklist (&n->id,
2371 n->connect_ack_timestamp,
2374 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
2375 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
2376 /* ATS asks us to switch while we were trying to connect; switch to new
2377 address and check blacklist again */
2378 set_primary_address (n,
2379 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2380 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2381 check_blacklist (&n->id,
2382 n->connect_ack_timestamp,
2385 case GNUNET_TRANSPORT_CONNECTED:
2386 GNUNET_assert (NULL != n->primary_address.address);
2387 GNUNET_assert (NULL != n->primary_address.session);
2388 if (n->primary_address.session == session)
2390 /* not an address change, just a quota change */
2391 set_primary_address (n,
2392 address, session, bandwidth_in, bandwidth_out, GNUNET_YES);
2395 /* ATS asks us to switch a life connection; see if we can get
2396 a CONNECT_ACK on it before we actually do this! */
2397 set_state (n, GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST);
2398 set_alternative_address (n, address, session, bandwidth_in, bandwidth_out);
2399 check_blacklist (&n->id,
2400 GNUNET_TIME_absolute_get (),
2403 case GNUNET_TRANSPORT_RECONNECT_ATS:
2404 set_primary_address (n,
2405 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2406 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2407 check_blacklist (&n->id,
2408 n->connect_ack_timestamp,
2411 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
2412 /* ATS asks us to switch while we were trying to reconnect; switch to new
2413 address and check blacklist again */
2414 set_primary_address (n,
2415 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2416 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2417 check_blacklist (&n->id,
2418 n->connect_ack_timestamp,
2421 case GNUNET_TRANSPORT_RECONNECT_SENT:
2422 /* ATS asks us to switch while we were trying to reconnect; switch to new
2423 address and check blacklist again */
2424 set_primary_address (n,
2425 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2426 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_BLACKLIST, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2427 check_blacklist (&n->id,
2428 n->connect_ack_timestamp,
2431 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
2432 if (n->primary_address.session == session)
2434 /* ATS switches back to still-active session */
2435 set_state(n, GNUNET_TRANSPORT_CONNECTED);
2436 free_address (&n->alternative_address);
2439 /* ATS asks us to switch a life connection, update blacklist check */
2440 set_primary_address (n,
2441 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2442 check_blacklist (&n->id,
2443 GNUNET_TIME_absolute_get (),
2446 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
2447 if (n->primary_address.session == session)
2449 /* ATS switches back to still-active session */
2450 free_address (&n->alternative_address);
2451 set_state (n, GNUNET_TRANSPORT_CONNECTED);
2454 /* ATS asks us to switch a life connection, update blacklist check */
2455 set_state (n, GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST);
2456 set_alternative_address (n, address, session, bandwidth_in, bandwidth_out);
2457 check_blacklist (&n->id,
2458 GNUNET_TIME_absolute_get (),
2461 case GNUNET_TRANSPORT_DISCONNECT:
2462 /* not going to switch addresses while disconnecting */
2464 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
2468 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2469 "Unhandled state `%s'\n",
2470 GNUNET_TRANSPORT_p2s (n->state));
2478 send_utilization_data (void *cls,
2479 const struct GNUNET_PeerIdentity *key,
2482 struct NeighbourMapEntry *n = value;
2483 struct GNUNET_ATS_Information atsi[4];
2485 uint32_t bps_pl_out;
2488 struct GNUNET_TIME_Relative delta;
2490 delta = GNUNET_TIME_absolute_get_difference (n->last_util_transmission,
2491 GNUNET_TIME_absolute_get ());
2495 if ((0 != n->util_payload_bytes_recv) && (0 != delta.rel_value_us))
2496 bps_pl_in = (1000LL * 1000LL * n->util_payload_bytes_recv) / (delta.rel_value_us);
2498 if ((0 != n->util_payload_bytes_sent) && (0 != delta.rel_value_us))
2499 bps_pl_out = (1000LL * 1000LL * n->util_payload_bytes_sent) / delta.rel_value_us;
2500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2501 "`%s' payload: received %u Bytes/s, sent %u Bytes/s\n",
2506 if ((0 != n->util_total_bytes_recv) && (0 != delta.rel_value_us))
2507 bps_in = (1000LL * 1000LL * n->util_total_bytes_recv) / (delta.rel_value_us);
2509 if ((0 != n->util_total_bytes_sent) && (0 != delta.rel_value_us))
2510 bps_out = (1000LL * 1000LL * n->util_total_bytes_sent) / delta.rel_value_us;
2513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2514 "`%s' total: received %u Bytes/s, sent %u Bytes/s\n",
2518 atsi[0].type = htonl (GNUNET_ATS_UTILIZATION_OUT);
2519 atsi[0].value = htonl (bps_out);
2520 atsi[1].type = htonl (GNUNET_ATS_UTILIZATION_IN);
2521 atsi[1].value = htonl (bps_in);
2523 atsi[2].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_OUT);
2524 atsi[2].value = htonl (bps_pl_out);
2525 atsi[3].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_IN);
2526 atsi[3].value = htonl (bps_pl_in);
2528 GST_ats_update_metrics (key, n->primary_address.address,
2529 n->primary_address.session, atsi, 4);
2530 n->util_payload_bytes_recv = 0;
2531 n->util_payload_bytes_sent = 0;
2532 n->util_total_bytes_recv = 0;
2533 n->util_total_bytes_sent = 0;
2534 n->last_util_transmission = GNUNET_TIME_absolute_get();
2540 * Task transmitting utilization in a regular interval
2542 * @param cls the 'struct NeighbourMapEntry' for which we are running
2543 * @param tc scheduler context (unused)
2546 utilization_transmission (void *cls,
2547 const struct GNUNET_SCHEDULER_TaskContext *tc)
2549 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
2551 if (0 < GNUNET_CONTAINER_multipeermap_size (neighbours))
2552 GNUNET_CONTAINER_multipeermap_iterate (neighbours, send_utilization_data, NULL);
2554 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
2555 utilization_transmission, NULL);
2561 GST_neighbours_notify_data_recv (const struct GNUNET_PeerIdentity *peer,
2562 const struct GNUNET_HELLO_Address *address,
2563 struct Session *session,
2564 const struct GNUNET_MessageHeader *message)
2566 struct NeighbourMapEntry *n;
2568 n = lookup_neighbour (peer);
2571 n->util_total_bytes_recv += ntohs(message->size);
2576 GST_neighbours_notify_payload_recv (const struct GNUNET_PeerIdentity *peer,
2577 const struct GNUNET_HELLO_Address *address,
2578 struct Session *session,
2579 const struct GNUNET_MessageHeader *message)
2581 struct NeighbourMapEntry *n;
2582 n = lookup_neighbour (peer);
2585 n->util_payload_bytes_recv += ntohs(message->size);
2590 GST_neighbours_notify_data_sent (const struct GNUNET_PeerIdentity *peer,
2591 const struct GNUNET_HELLO_Address *address,
2592 struct Session *session,
2595 struct NeighbourMapEntry *n;
2596 n = lookup_neighbour (peer);
2599 if (n->primary_address.session != session)
2601 n->util_total_bytes_sent += size;
2606 GST_neighbours_notify_payload_sent (const struct GNUNET_PeerIdentity *peer,
2609 struct NeighbourMapEntry *n;
2610 n = lookup_neighbour (peer);
2613 n->util_payload_bytes_sent += size;
2618 * Master task run for every neighbour. Performs all of the time-related
2619 * activities (keep alive, send next message, disconnect if idle, finish
2620 * clean up after disconnect).
2622 * @param cls the 'struct NeighbourMapEntry' for which we are running
2623 * @param tc scheduler context (unused)
2626 master_task (void *cls,
2627 const struct GNUNET_SCHEDULER_TaskContext *tc)
2629 struct NeighbourMapEntry *n = cls;
2630 struct GNUNET_TIME_Relative delay;
2632 n->task = GNUNET_SCHEDULER_NO_TASK;
2633 delay = GNUNET_TIME_absolute_get_remaining (n->timeout);
2634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2635 "Master task runs for neighbour `%s' in state %s with timeout in %s\n",
2636 GNUNET_i2s (&n->id),
2637 GNUNET_TRANSPORT_p2s(n->state),
2638 GNUNET_STRINGS_relative_time_to_string (delay,
2642 case GNUNET_TRANSPORT_NOT_CONNECTED:
2643 /* invalid state for master task, clean up */
2645 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2646 free_neighbour (n, GNUNET_NO);
2648 case GNUNET_TRANSPORT_INIT_ATS:
2649 if (0 == delay.rel_value_us)
2651 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2652 "Connection to `%s' timed out waiting for ATS to provide address\n",
2653 GNUNET_i2s (&n->id));
2654 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2655 free_neighbour (n, GNUNET_NO);
2659 case GNUNET_TRANSPORT_INIT_BLACKLIST:
2660 if (0 == delay.rel_value_us)
2662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2663 "Connection to `%s' timed out waiting for BLACKLIST to approve address\n",
2664 GNUNET_i2s (&n->id));
2665 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2666 free_neighbour (n, GNUNET_NO);
2670 case GNUNET_TRANSPORT_CONNECT_SENT:
2671 if (0 == delay.rel_value_us)
2673 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2674 "Connection to `%s' timed out waiting for other peer to send CONNECT_ACK\n",
2675 GNUNET_i2s (&n->id));
2676 /* We could not send to this address, delete address and session */
2677 if (NULL != n->primary_address.session)
2678 GNUNET_ATS_address_destroyed (GST_ats,
2679 n->primary_address.address, n->primary_address.session);
2680 GNUNET_ATS_address_destroyed (GST_ats,
2681 n->primary_address.address, NULL);
2682 disconnect_neighbour (n);
2686 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
2687 if (0 == delay.rel_value_us)
2689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2690 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for received CONNECT\n",
2691 GNUNET_i2s (&n->id));
2692 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2693 free_neighbour (n, GNUNET_NO);
2697 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
2698 if (0 == delay.rel_value_us)
2700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2701 "Connection to `%s' timed out waiting ATS to provide address to use for CONNECT_ACK\n",
2702 GNUNET_i2s (&n->id));
2703 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2704 free_neighbour (n, GNUNET_NO);
2708 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
2709 if (0 == delay.rel_value_us)
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2712 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for CONNECT_ACK\n",
2713 GNUNET_i2s (&n->id));
2714 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
2715 free_neighbour (n, GNUNET_NO);
2719 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
2720 if (0 == delay.rel_value_us)
2722 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2723 "Connection to `%s' timed out waiting for other peer to send SESSION_ACK\n",
2724 GNUNET_i2s (&n->id));
2725 disconnect_neighbour (n);
2729 case GNUNET_TRANSPORT_CONNECTED:
2730 if (0 == delay.rel_value_us)
2732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2733 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
2734 GNUNET_i2s (&n->id));
2735 disconnect_neighbour (n);
2738 try_transmission_to_peer (n);
2741 case GNUNET_TRANSPORT_RECONNECT_ATS:
2742 if (0 == delay.rel_value_us)
2744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2745 "Connection to `%s' timed out, waiting for ATS replacement address\n",
2746 GNUNET_i2s (&n->id));
2747 disconnect_neighbour (n);
2751 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
2752 if (0 == delay.rel_value_us)
2754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2755 "Connection to `%s' timed out, waiting for BLACKLIST to approve replacement address\n",
2756 GNUNET_i2s (&n->id));
2757 disconnect_neighbour (n);
2761 case GNUNET_TRANSPORT_RECONNECT_SENT:
2762 if (0 == delay.rel_value_us)
2764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2765 "Connection to `%s' timed out, waiting for other peer to CONNECT_ACK replacement address\n",
2766 GNUNET_i2s (&n->id));
2767 disconnect_neighbour (n);
2771 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
2772 if (0 == delay.rel_value_us)
2774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2775 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
2776 GNUNET_i2s (&n->id));
2777 disconnect_neighbour (n);
2780 try_transmission_to_peer (n);
2783 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
2784 if (0 == delay.rel_value_us)
2786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2787 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs (after trying to CONNECT on alternative address)\n",
2788 GNUNET_i2s (&n->id));
2789 disconnect_neighbour (n);
2792 try_transmission_to_peer (n);
2795 case GNUNET_TRANSPORT_DISCONNECT:
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2797 "Cleaning up connection to `%s' after sending DISCONNECT\n",
2798 GNUNET_i2s (&n->id));
2799 free_neighbour (n, GNUNET_NO);
2801 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
2802 /* how did we get here!? */
2806 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2807 "Unhandled state `%s'\n",
2808 GNUNET_TRANSPORT_p2s (n->state));
2812 if ( (GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT == n->state) ||
2813 (GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
2814 (GNUNET_TRANSPORT_CONNECTED == n->state) )
2816 /* if we are *now* in one of these three states, we're sending
2817 keep alive messages, so we need to consider the keepalive
2818 delay, not just the connection timeout */
2819 delay = GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time),
2822 if (GNUNET_SCHEDULER_NO_TASK == n->task)
2823 n->task = GNUNET_SCHEDULER_add_delayed (delay,
2830 * Send a SESSION_ACK message to the neighbour to confirm that we
2831 * got his CONNECT_ACK.
2833 * @param n neighbour to send the SESSION_ACK to
2836 send_session_ack_message (struct NeighbourMapEntry *n)
2838 struct GNUNET_MessageHeader msg;
2840 msg.size = htons (sizeof (struct GNUNET_MessageHeader));
2841 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
2842 (void) send_with_session(n,
2843 (const char *) &msg, sizeof (struct GNUNET_MessageHeader),
2844 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_NO,
2850 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
2851 * Consider switching to it.
2853 * @param message possibly a 'struct SessionConnectMessage' (check format)
2854 * @param peer identity of the peer to switch the address for
2855 * @param address address of the other peer, NULL if other peer
2857 * @param session session to use (or NULL)
2858 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
2861 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
2862 const struct GNUNET_PeerIdentity *peer,
2863 const struct GNUNET_HELLO_Address *address,
2864 struct Session *session)
2866 const struct SessionConnectMessage *scm;
2867 struct GNUNET_TIME_Absolute ts;
2868 struct NeighbourMapEntry *n;
2870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2871 "Received CONNECT_ACK message from peer `%s'\n",
2874 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2876 GNUNET_break_op (0);
2877 return GNUNET_SYSERR;
2879 GNUNET_STATISTICS_update (GST_stats,
2881 ("# CONNECT_ACK messages received"),
2883 scm = (const struct SessionConnectMessage *) message;
2884 GNUNET_break_op (ntohl (scm->reserved) == 0);
2885 if (NULL == (n = lookup_neighbour (peer)))
2887 GNUNET_STATISTICS_update (GST_stats,
2889 ("# unexpected CONNECT_ACK messages (no peer)"),
2891 return GNUNET_SYSERR;
2893 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2896 case GNUNET_TRANSPORT_NOT_CONNECTED:
2898 free_neighbour (n, GNUNET_NO);
2899 return GNUNET_SYSERR;
2900 case GNUNET_TRANSPORT_INIT_ATS:
2901 case GNUNET_TRANSPORT_INIT_BLACKLIST:
2902 GNUNET_STATISTICS_update (GST_stats,
2904 ("# unexpected CONNECT_ACK messages (not ready)"),
2907 case GNUNET_TRANSPORT_CONNECT_SENT:
2908 if (ts.abs_value_us != n->primary_address.connect_timestamp.abs_value_us)
2910 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2911 "CONNECT_ACK ignored as the timestamp does not match our CONNECT request\n");
2914 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
2915 GNUNET_STATISTICS_set (GST_stats,
2916 gettext_noop ("# peers connected"),
2917 ++neighbours_connected,
2919 connect_notify_cb (callback_cls, &n->id,
2920 n->primary_address.bandwidth_in,
2921 n->primary_address.bandwidth_out);
2922 /* Tell ATS that the outbound session we created to send CONNECT was successful */
2923 GST_ats_add_address (n->primary_address.address,
2924 n->primary_address.session,
2926 set_primary_address (n,
2927 n->primary_address.address,
2928 n->primary_address.session,
2929 n->primary_address.bandwidth_in,
2930 n->primary_address.bandwidth_out,
2932 send_session_ack_message (n);
2934 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
2935 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
2936 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
2937 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
2938 GNUNET_STATISTICS_update (GST_stats,
2940 ("# unexpected CONNECT_ACK messages (not ready)"),
2943 case GNUNET_TRANSPORT_CONNECTED:
2944 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
2945 send_session_ack_message (n);
2947 case GNUNET_TRANSPORT_RECONNECT_ATS:
2948 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
2949 /* we didn't expect any CONNECT_ACK, as we are waiting for ATS
2950 to give us a new address... */
2951 GNUNET_STATISTICS_update (GST_stats,
2953 ("# unexpected CONNECT_ACK messages (waiting on ATS)"),
2956 case GNUNET_TRANSPORT_RECONNECT_SENT:
2957 /* new address worked; go back to connected! */
2958 set_state (n, GNUNET_TRANSPORT_CONNECTED);
2959 send_session_ack_message (n);
2961 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
2962 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
2963 send_session_ack_message (n);
2965 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
2966 /* new address worked; adopt it and go back to connected! */
2967 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
2968 GNUNET_break (GNUNET_NO == n->alternative_address.ats_active);
2970 GST_ats_add_address (n->alternative_address.address,
2971 n->alternative_address.session,
2973 set_primary_address (n, n->alternative_address.address,
2974 n->alternative_address.session, n->alternative_address.bandwidth_in,
2975 n->alternative_address.bandwidth_out, GNUNET_YES);
2977 free_address (&n->alternative_address);
2978 send_session_ack_message (n);
2980 case GNUNET_TRANSPORT_DISCONNECT:
2981 GNUNET_STATISTICS_update (GST_stats,
2983 ("# unexpected CONNECT_ACK messages (disconnecting)"),
2985 return GNUNET_SYSERR;
2986 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
2990 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2991 "Unhandled state `%s'\n",
2992 GNUNET_TRANSPORT_p2s (n->state));
2994 return GNUNET_SYSERR;
3001 * A session was terminated. Take note; if needed, try to get
3002 * an alternative address from ATS.
3004 * @param peer identity of the peer where the session died
3005 * @param session session that is gone
3006 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
3007 * this session was not in use
3010 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
3011 struct Session *session)
3013 struct NeighbourMapEntry *n;
3014 struct BlackListCheckContext *bcc;
3015 struct BlackListCheckContext *bcc_next;
3017 /* make sure to cancel all ongoing blacklist checks involving 'session' */
3019 while (NULL != (bcc = bcc_next))
3021 bcc_next = bcc->next;
3022 if (bcc->na.session == session)
3024 if (NULL != bcc->bc)
3025 GST_blacklist_test_cancel (bcc->bc);
3026 GNUNET_HELLO_address_free (bcc->na.address);
3027 GNUNET_CONTAINER_DLL_remove (bc_head,
3033 if (NULL == (n = lookup_neighbour (peer)))
3034 return GNUNET_NO; /* can't affect us */
3035 if (session != n->primary_address.session)
3037 if (session == n->alternative_address.session)
3039 if ( (GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
3040 (GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT == n->state) )
3041 set_state (n, GNUNET_TRANSPORT_CONNECTED);
3044 free_address (&n->alternative_address);
3046 return GNUNET_NO; /* doesn't affect us further */
3049 n->expect_latency_response = GNUNET_NO;
3052 case GNUNET_TRANSPORT_NOT_CONNECTED:
3054 free_neighbour (n, GNUNET_NO);
3056 case GNUNET_TRANSPORT_INIT_ATS:
3058 free_neighbour (n, GNUNET_NO);
3060 case GNUNET_TRANSPORT_INIT_BLACKLIST:
3061 case GNUNET_TRANSPORT_CONNECT_SENT:
3062 free_address (&n->primary_address);
3063 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3065 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
3066 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
3067 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
3068 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
3069 /* error on inbound session; free neighbour entirely */
3070 free_address (&n->primary_address);
3071 free_neighbour (n, GNUNET_NO);
3073 case GNUNET_TRANSPORT_CONNECTED:
3074 set_state_and_timeout (n, GNUNET_TRANSPORT_INIT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3075 free_address (&n->primary_address);
3077 case GNUNET_TRANSPORT_RECONNECT_ATS:
3078 /* we don't have an address, how can it go down? */
3081 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
3082 case GNUNET_TRANSPORT_RECONNECT_SENT:
3083 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3085 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
3086 /* primary went down while we were checking secondary against
3087 blacklist, adopt secondary as primary */
3088 free_address (&n->primary_address);
3089 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_BLACKLIST, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3090 n->primary_address = n->alternative_address;
3091 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3093 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
3094 /* primary went down while we were waiting for CONNECT_ACK on secondary;
3095 secondary as primary */
3096 free_address (&n->primary_address);
3097 n->primary_address = n->alternative_address;
3098 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3099 set_state_and_timeout (n, GNUNET_TRANSPORT_RECONNECT_SENT, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3101 case GNUNET_TRANSPORT_DISCONNECT:
3102 free_address (&n->primary_address);
3104 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
3105 /* neighbour was freed and plugins told to terminate session */
3109 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3110 "Unhandled state `%s'\n",
3111 GNUNET_TRANSPORT_p2s (n->state));
3115 if (GNUNET_SCHEDULER_NO_TASK != n->task)
3116 GNUNET_SCHEDULER_cancel (n->task);
3117 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
3123 * We received a 'SESSION_ACK' message from the other peer.
3124 * If we sent a 'CONNECT_ACK' last, this means we are now
3125 * connected. Otherwise, do nothing.
3127 * @param message possibly a 'struct SessionConnectMessage' (check format)
3128 * @param peer identity of the peer to switch the address for
3129 * @param address address of the other peer, NULL if other peer
3131 * @param session session to use (or NULL)
3132 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3135 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
3136 const struct GNUNET_PeerIdentity *peer,
3137 const struct GNUNET_HELLO_Address *address,
3138 struct Session *session)
3140 struct NeighbourMapEntry *n;
3142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3143 "Received SESSION_ACK message from peer `%s'\n",
3145 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
3147 GNUNET_break_op (0);
3148 return GNUNET_SYSERR;
3150 GNUNET_STATISTICS_update (GST_stats,
3152 ("# SESSION_ACK messages received"),
3154 if (NULL == (n = lookup_neighbour (peer)))
3156 GNUNET_break_op (0);
3157 return GNUNET_SYSERR;
3159 /* check if we are in a plausible state for having sent
3160 a CONNECT_ACK. If not, return, otherwise break */
3161 if ( ( (GNUNET_TRANSPORT_CONNECT_RECV_ACK != n->state) &&
3162 (GNUNET_TRANSPORT_CONNECT_SENT != n->state) ) ||
3163 (2 != n->send_connect_ack) )
3165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3166 "Received SESSION_ACK message from peer `%s' in state %s/%d\n",
3168 GNUNET_TRANSPORT_p2s (n->state),
3169 n->send_connect_ack);
3170 GNUNET_STATISTICS_update (GST_stats,
3171 gettext_noop ("# unexpected SESSION_ACK messages"), 1,
3175 set_state_and_timeout (n, GNUNET_TRANSPORT_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3176 GNUNET_STATISTICS_set (GST_stats,
3177 gettext_noop ("# peers connected"),
3178 ++neighbours_connected,
3180 connect_notify_cb (callback_cls, &n->id,
3181 n->primary_address.bandwidth_in,
3182 n->primary_address.bandwidth_out);
3184 GST_ats_add_address (n->primary_address.address,
3185 n->primary_address.session,
3187 set_primary_address (n,
3188 n->primary_address.address,
3189 n->primary_address.session,
3190 n->primary_address.bandwidth_in,
3191 n->primary_address.bandwidth_out,
3198 * Test if we're connected to the given peer.
3200 * @param target peer to test
3201 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
3204 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
3206 return test_connected (lookup_neighbour (target));
3211 * Change the incoming quota for the given peer.
3213 * @param neighbour identity of peer to change qutoa for
3214 * @param quota new quota
3217 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
3218 struct GNUNET_BANDWIDTH_Value32NBO quota)
3220 struct NeighbourMapEntry *n;
3222 if (NULL == (n = lookup_neighbour (neighbour)))
3224 GNUNET_STATISTICS_update (GST_stats,
3226 ("# SET QUOTA messages ignored (no such peer)"),
3230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3231 "Setting inbound quota of %u Bps for peer `%s' to all clients\n",
3232 ntohl (quota.value__), GNUNET_i2s (&n->id));
3233 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
3234 if (0 != ntohl (quota.value__))
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3237 "Disconnecting peer `%4s' due to SET_QUOTA\n",
3238 GNUNET_i2s (&n->id));
3239 if (GNUNET_YES == test_connected (n))
3240 GNUNET_STATISTICS_update (GST_stats,
3241 gettext_noop ("# disconnects due to quota of 0"),
3243 disconnect_neighbour (n);
3248 * We received a disconnect message from the given peer,
3249 * validate and process.
3251 * @param peer sender of the message
3252 * @param msg the disconnect message
3255 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
3256 const struct GNUNET_MessageHeader *msg)
3258 struct NeighbourMapEntry *n;
3259 const struct SessionDisconnectMessage *sdm;
3261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3262 "Received DISCONNECT message from peer `%s'\n",
3264 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
3266 // GNUNET_break_op (0);
3267 GNUNET_STATISTICS_update (GST_stats,
3269 ("# disconnect messages ignored (old format)"), 1,
3273 GNUNET_STATISTICS_update (GST_stats,
3275 ("# DISCONNECT messages received"),
3277 sdm = (const struct SessionDisconnectMessage *) msg;
3278 if (NULL == (n = lookup_neighbour (peer)))
3279 return; /* gone already */
3280 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value_us <= n->connect_ack_timestamp.abs_value_us)
3282 GNUNET_STATISTICS_update (GST_stats,
3284 ("# disconnect messages ignored (timestamp)"), 1,
3288 if (0 != memcmp (peer, &sdm->public_key, sizeof (struct GNUNET_PeerIdentity)))
3290 GNUNET_break_op (0);
3293 if (ntohl (sdm->purpose.size) !=
3294 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
3295 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
3296 sizeof (struct GNUNET_TIME_AbsoluteNBO))
3298 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3299 "%s message from peer `%s' has invalid size \n",
3302 GNUNET_break_op (0);
3306 GNUNET_CRYPTO_eddsa_verify
3307 (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
3308 &sdm->signature, &sdm->public_key))
3310 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3311 "%s message from peer `%s' cannot be verified \n",
3314 GNUNET_break_op (0);
3317 if (GNUNET_YES == test_connected (n))
3318 GNUNET_STATISTICS_update (GST_stats,
3320 ("# other peer asked to disconnect from us"), 1,
3322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3323 "Disconnecting by request from peer %s\n",
3325 disconnect_neighbour (n);
3330 * Closure for the neighbours_iterate function.
3332 struct IteratorContext
3335 * Function to call on each connected neighbour.
3337 GST_NeighbourIterator cb;
3347 * Call the callback from the closure for each neighbour.
3349 * @param cls the `struct IteratorContext`
3350 * @param key the hash of the public key of the neighbour
3351 * @param value the `struct NeighbourMapEntry`
3352 * @return #GNUNET_OK (continue to iterate)
3355 neighbours_iterate (void *cls,
3356 const struct GNUNET_PeerIdentity *key,
3359 struct IteratorContext *ic = cls;
3360 struct NeighbourMapEntry *n = value;
3361 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
3362 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
3365 if (NULL != n->primary_address.address)
3367 bandwidth_in = n->primary_address.bandwidth_in;
3368 bandwidth_out = n->primary_address.bandwidth_out;
3372 bandwidth_in = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3373 bandwidth_out = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3377 n->primary_address.address,
3380 bandwidth_in, bandwidth_out);
3386 * Iterate over all connected neighbours.
3388 * @param cb function to call
3389 * @param cb_cls closure for cb
3392 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
3394 struct IteratorContext ic;
3396 if (NULL == neighbours)
3397 return; /* can happen during shutdown */
3400 GNUNET_CONTAINER_multipeermap_iterate (neighbours, &neighbours_iterate, &ic);
3405 * If we have an active connection to the given target, it must be shutdown.
3407 * @param target peer to disconnect from
3410 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
3412 struct NeighbourMapEntry *n;
3414 if (NULL == (n = lookup_neighbour (target)))
3415 return; /* not active */
3416 if (GNUNET_YES == test_connected (n))
3417 GNUNET_STATISTICS_update (GST_stats,
3419 ("# disconnected from peer upon explicit request"), 1,
3421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3422 "Forced disconnect from peer %s\n",
3423 GNUNET_i2s (target));
3424 disconnect_neighbour (n);
3429 * Obtain current latency information for the given neighbour.
3431 * @param peer to get the latency for
3432 * @return observed latency of the address, FOREVER if the
3433 * the connection is not up
3435 struct GNUNET_TIME_Relative
3436 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
3438 struct NeighbourMapEntry *n;
3440 n = lookup_neighbour (peer);
3442 return GNUNET_TIME_UNIT_FOREVER_REL;
3445 case GNUNET_TRANSPORT_CONNECTED:
3446 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_CONNECT_SENT:
3447 case GNUNET_TRANSPORT_CONNECTED_SWITCHING_BLACKLIST:
3448 case GNUNET_TRANSPORT_RECONNECT_SENT:
3449 case GNUNET_TRANSPORT_RECONNECT_ATS:
3450 case GNUNET_TRANSPORT_RECONNECT_BLACKLIST:
3452 case GNUNET_TRANSPORT_NOT_CONNECTED:
3453 case GNUNET_TRANSPORT_INIT_BLACKLIST:
3454 case GNUNET_TRANSPORT_INIT_ATS:
3455 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST_INBOUND:
3456 case GNUNET_TRANSPORT_CONNECT_RECV_ATS:
3457 case GNUNET_TRANSPORT_CONNECT_RECV_BLACKLIST:
3458 case GNUNET_TRANSPORT_CONNECT_RECV_ACK:
3459 case GNUNET_TRANSPORT_CONNECT_SENT:
3460 case GNUNET_TRANSPORT_DISCONNECT:
3461 case GNUNET_TRANSPORT_DISCONNECT_FINISHED:
3462 return GNUNET_TIME_UNIT_FOREVER_REL;
3464 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3465 "Unhandled state `%s'\n",
3466 GNUNET_TRANSPORT_p2s (n->state));
3470 return GNUNET_TIME_UNIT_FOREVER_REL;
3475 * Obtain current address information for the given neighbour.
3478 * @return address currently used
3480 struct GNUNET_HELLO_Address *
3481 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer)
3483 struct NeighbourMapEntry *n;
3485 n = lookup_neighbour (peer);
3488 return n->primary_address.address;
3493 * Initialize the neighbours subsystem.
3495 * @param cls closure for callbacks
3496 * @param connect_cb function to call if we connect to a peer
3497 * @param disconnect_cb function to call if we disconnect from a peer
3498 * @param peer_address_cb function to call if we change an active address
3500 * @param max_fds maximum number of fds to use
3503 GST_neighbours_start (void *cls,
3504 NotifyConnect connect_cb,
3505 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
3506 GNUNET_TRANSPORT_NeighbourChangeCallback peer_address_cb,
3507 unsigned int max_fds)
3510 connect_notify_cb = connect_cb;
3511 disconnect_notify_cb = disconnect_cb;
3512 neighbour_change_cb = peer_address_cb;
3513 neighbours = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3514 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
3515 utilization_transmission, NULL);
3520 * Disconnect from the given neighbour.
3523 * @param key hash of neighbour's public key (not used)
3524 * @param value the 'struct NeighbourMapEntry' of the neighbour
3525 * @return #GNUNET_OK (continue to iterate)
3528 disconnect_all_neighbours (void *cls,
3529 const struct GNUNET_PeerIdentity *key,
3532 struct NeighbourMapEntry *n = value;
3534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3535 "Disconnecting peer `%4s', %s\n",
3536 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
3537 set_state (n, GNUNET_TRANSPORT_DISCONNECT_FINISHED);
3538 free_neighbour (n, GNUNET_NO);
3544 * Cleanup the neighbours subsystem.
3547 GST_neighbours_stop ()
3549 if (NULL == neighbours)
3551 if (GNUNET_SCHEDULER_NO_TASK != util_transmission_tk)
3553 GNUNET_SCHEDULER_cancel (util_transmission_tk);
3554 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
3557 GNUNET_CONTAINER_multipeermap_iterate (neighbours,
3558 &disconnect_all_neighbours,
3560 GNUNET_CONTAINER_multipeermap_destroy (neighbours);
3562 callback_cls = NULL;
3563 connect_notify_cb = NULL;
3564 disconnect_notify_cb = NULL;
3565 neighbour_change_cb = NULL;
3569 /* end of file gnunet-service-transport_neighbours.c */