2 This file is part of GNUnet.
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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 * List of pending blacklist checks: head
468 static struct BlacklistCheckSwitchContext *pending_bc_head;
471 * List of pending blacklist checks: tail
473 static struct BlacklistCheckSwitchContext *pending_bc_tail;
476 * Closure for #connect_notify_cb, #disconnect_notify_cb and #neighbour_change_cb
478 static void *callback_cls;
481 * Function to call when we connected to a neighbour.
483 static NotifyConnect connect_notify_cb;
486 * Function to call when we disconnected from a neighbour.
488 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
491 * Function to call when a neighbour changed address, state or bandwidth.
493 static GNUNET_TRANSPORT_NeighbourChangeCallback neighbour_change_cb;
496 * counter for connected neighbours
498 static unsigned int neighbours_connected;
501 * Number of bytes we have currently queued for transmission.
503 static unsigned long long bytes_in_send_queue;
506 * Task transmitting utilization data
508 static GNUNET_SCHEDULER_TaskIdentifier util_transmission_tk;
511 static struct GNUNET_CONTAINER_MultiPeerMap *registered_quota_notifications;
514 * Lookup a neighbour entry in the neighbours hash map.
516 * @param pid identity of the peer to look up
517 * @return the entry, NULL if there is no existing record
519 static struct NeighbourMapEntry *
520 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
522 if (NULL == neighbours)
524 return GNUNET_CONTAINER_multipeermap_get (neighbours, pid);
529 * Test if we're connected to the given peer.
531 * @param n neighbour entry of peer to test
532 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
535 test_connected (struct NeighbourMapEntry *n)
539 return GNUNET_TRANSPORT_is_connected (n->state);
543 * Send information about a new outbound quota to our clients.
545 * @param target affected peer
546 * @param quota new quota
549 send_outbound_quota (const struct GNUNET_PeerIdentity *target,
550 struct GNUNET_BANDWIDTH_Value32NBO quota)
552 struct QuotaSetMessage q_msg;
554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
555 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
556 ntohl (quota.value__), GNUNET_i2s (target));
557 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
558 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
560 q_msg.peer = (*target);
561 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
566 * We don't need a given neighbour address any more.
567 * Release its resources and give appropriate notifications
568 * to ATS and other subsystems.
570 * @param na address we are done with; @a na itself must NOT be 'free'd, only the contents!
573 free_address (struct NeighbourAddress *na)
575 if (GNUNET_YES == na->ats_active)
577 GST_validation_set_address_use (na->address, na->session, GNUNET_NO);
578 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_NO);
581 na->bandwidth_in = GNUNET_BANDWIDTH_value_init (0);
582 na->bandwidth_out = GNUNET_BANDWIDTH_value_init (0);
583 na->ats_active = GNUNET_NO;
584 na->keep_alive_nonce = 0;
585 if (NULL != na->address)
587 GNUNET_HELLO_address_free (na->address);
595 * Set net state for this neighbour and notify monitoring
597 * @param n the respective neighbour
598 * @param s the new state
601 set_state (struct NeighbourMapEntry *n, enum GNUNET_TRANSPORT_PeerState s)
604 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s\n",
606 GNUNET_TRANSPORT_ps2s(s));
607 neighbour_change_cb (callback_cls,
609 n->primary_address.address,
610 n->state, n->timeout,
611 n->primary_address.bandwidth_in,
612 n->primary_address.bandwidth_out);
617 * Set net state and state timeout for this neighbour and notify monitoring
619 * @param n the respective neighbour
620 * @param s the new state
621 * @param timeout the new timeout
624 set_state_and_timeout (struct NeighbourMapEntry *n,
625 enum GNUNET_TRANSPORT_PeerState s,
626 struct GNUNET_TIME_Absolute timeout)
629 n->timeout = timeout;
630 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s with timeout %s\n",
632 GNUNET_TRANSPORT_ps2s(s),
633 GNUNET_STRINGS_absolute_time_to_string (timeout));
634 neighbour_change_cb (callback_cls,
636 n->primary_address.address,
637 n->state, n->timeout,
638 n->primary_address.bandwidth_in,
639 n->primary_address.bandwidth_out);
644 * Set new state timeout for this neighbour and notify monitoring
646 * @param n the respective neighbour
647 * @param timeout the new timeout
650 set_timeout (struct NeighbourMapEntry *n,
651 struct GNUNET_TIME_Absolute timeout)
653 n->timeout = timeout;
654 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed timeout %s\n",
656 GNUNET_STRINGS_absolute_time_to_string (timeout));
657 neighbour_change_cb (callback_cls,
659 n->primary_address.address,
660 n->state, n->timeout,
661 n->primary_address.bandwidth_in,
662 n->primary_address.bandwidth_out);
667 * Initialize the alternative address of a neighbour
669 * @param n the neighbour
670 * @param address address of the other peer, NULL if other peer
672 * @param session session to use (or NULL, in which case an
673 * address must be setup)
674 * @param bandwidth_in inbound quota to be used when connection is up
675 * @param bandwidth_out outbound quota to be used when connection is up
678 set_alternative_address (struct NeighbourMapEntry *n,
679 const struct GNUNET_HELLO_Address *address,
680 struct Session *session,
681 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
682 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
684 struct GNUNET_TRANSPORT_PluginFunctions *papi;
685 if (NULL == (papi = GST_plugins_find (address->transport_name)))
690 if (session == n->alternative_address.session)
692 n->alternative_address.bandwidth_in = bandwidth_in;
693 n->alternative_address.bandwidth_out = bandwidth_out;
696 free_address (&n->alternative_address);
698 session = papi->get_session (papi->cls, address);
701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
702 "Failed to obtain new session for peer `%s' and address '%s'\n",
703 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
704 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
708 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' configured alternative address %s\n",
710 GST_plugins_a2s(address));
712 n->alternative_address.address = GNUNET_HELLO_address_copy (address);
713 n->alternative_address.bandwidth_in = bandwidth_in;
714 n->alternative_address.bandwidth_out = bandwidth_out;
715 n->alternative_address.session = session;
716 n->alternative_address.ats_active = GNUNET_NO;
717 n->alternative_address.keep_alive_nonce = 0;
722 * Initialize the primary address of a neighbour
724 * @param n the neighbour
725 * @param address address of the other peer, NULL if other peer
727 * @param session session to use (or NULL, in which case an
728 * address must be setup)
729 * @param bandwidth_in inbound quota to be used when connection is up
730 * @param bandwidth_out outbound quota to be used when connection is up
731 * @param is_active #GNUNET_YES to mark this as the active address with ATS
734 set_primary_address (struct NeighbourMapEntry *n,
735 const struct GNUNET_HELLO_Address *address,
736 struct Session *session,
737 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
738 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
741 struct GNUNET_TRANSPORT_PluginFunctions *papi;
743 if (NULL == (papi = GST_plugins_find (address->transport_name)))
748 if (session == n->primary_address.session)
750 n->primary_address.bandwidth_in = bandwidth_in;
751 n->primary_address.bandwidth_out = bandwidth_out;
752 if (is_active != n->primary_address.ats_active)
754 n->primary_address.ats_active = is_active;
755 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, is_active);
756 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, is_active);
758 if (GNUNET_YES == is_active)
760 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
761 send_outbound_quota (&address->peer, bandwidth_out);
765 free_address (&n->primary_address);
767 session = papi->get_session (papi->cls, address);
770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
771 "Failed to obtain new session for peer `%s' and address '%s'\n",
772 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
773 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
777 n->primary_address.address = GNUNET_HELLO_address_copy (address);
778 n->primary_address.bandwidth_in = bandwidth_in;
779 n->primary_address.bandwidth_out = bandwidth_out;
780 n->primary_address.session = session;
781 n->primary_address.ats_active = is_active;
782 n->primary_address.keep_alive_nonce = 0;
783 if (GNUNET_YES == is_active)
785 /* Telling ATS about new session */
786 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, GNUNET_YES);
787 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, GNUNET_YES);
788 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
789 send_outbound_quota (&address->peer, bandwidth_out);
792 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' switched to address `%s'\n",
794 GST_plugins_a2s(address));
796 neighbour_change_cb (callback_cls,
798 n->primary_address.address,
799 n->state, n->timeout,
800 n->primary_address.bandwidth_in,
801 n->primary_address.bandwidth_out);
805 * Clear the primary address of a neighbour since this primary address is not
806 * valid anymore and notify monitoring about it
808 * @param n the neighbour
811 unset_primary_address (struct NeighbourMapEntry *n)
813 /* Unset primary address */
814 free_address (&n->primary_address);
816 /* Notify monitoring about it */
817 neighbour_change_cb (callback_cls,
820 n->state, n->timeout,
821 n->primary_address.bandwidth_in,
822 n->primary_address.bandwidth_out);
828 * Free a neighbour map entry.
830 * @param n entry to free
831 * @param keep_sessions #GNUNET_NO to tell plugin to terminate sessions,
832 * #GNUNET_YES to keep all sessions
835 free_neighbour (struct NeighbourMapEntry *n,
838 struct MessageQueue *mq;
839 struct GNUNET_TRANSPORT_PluginFunctions *papi;
840 struct GNUNET_HELLO_Address *backup_primary;
842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
843 "Freeing neighbour state of peer `%s'\n",
844 GNUNET_i2s (&n->id));
845 n->is_active = NULL; /* always free'd by its own continuation! */
847 /* fail messages currently in the queue */
848 while (NULL != (mq = n->messages_head))
850 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
851 if (NULL != mq->cont)
852 mq->cont (mq->cont_cls, GNUNET_SYSERR, mq->message_buf_size, 0);
855 /* It is too late to send other peer disconnect notifications, but at
856 least internally we need to get clean... */
857 if (GNUNET_YES == test_connected (n))
859 GNUNET_STATISTICS_set (GST_stats,
860 gettext_noop ("# peers connected"),
861 --neighbours_connected,
863 disconnect_notify_cb (callback_cls, &n->id);
866 /* Mark peer as disconnected */
867 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED);
869 if (NULL != n->primary_address.address)
870 backup_primary = GNUNET_HELLO_address_copy (n->primary_address.address);
872 backup_primary = NULL;
874 /* free addresses and mark as unused */
875 unset_primary_address (n);
876 free_address (&n->alternative_address);
878 /* cut all transport-level connection for this peer */
879 if ((GNUNET_NO == keep_sessions) &&
880 (NULL != backup_primary) &&
881 (NULL != (papi = GST_plugins_find (backup_primary->transport_name))))
882 papi->disconnect_peer (papi->cls, &n->id);
884 if (NULL != backup_primary)
885 GNUNET_HELLO_address_free (backup_primary);
886 GNUNET_assert (GNUNET_YES ==
887 GNUNET_CONTAINER_multipeermap_remove (neighbours,
890 /* Cancel address requests for this peer */
891 if (NULL != n->suggest_handle)
893 GNUNET_ATS_suggest_address_cancel (GST_ats, &n->id);
894 n->suggest_handle = NULL;
897 /* Cancel the master task */
898 if (GNUNET_SCHEDULER_NO_TASK != n->task)
900 GNUNET_SCHEDULER_cancel (n->task);
901 n->task = GNUNET_SCHEDULER_NO_TASK;
903 /* free rest of memory */
909 * Transmit a message using the current session of the given
912 * @param n entry for the recipient
913 * @param msgbuf buffer to transmit
914 * @param msgbuf_size number of bytes in @a msgbuf buffer
915 * @param priority transmission priority
916 * @param timeout transmission timeout
917 * @param use_keepalive_timeout #GNUNET_YES to use plugin-specific keep-alive
918 * timeout (@a timeout is ignored in that case), #GNUNET_NO otherwise
919 * @param cont continuation to call when finished (can be NULL)
920 * @param cont_cls closure for @a cont
921 * @return timeout (copy of @a timeout or a calculated one if
922 * @a use_keepalive_timeout is #GNUNET_YES.
924 static struct GNUNET_TIME_Relative
925 send_with_session (struct NeighbourMapEntry *n,
926 const char *msgbuf, size_t msgbuf_size,
928 struct GNUNET_TIME_Relative timeout,
929 unsigned int use_keepalive_timeout,
930 GNUNET_TRANSPORT_TransmitContinuation cont,
933 struct GNUNET_TRANSPORT_PluginFunctions *papi;
934 struct GNUNET_TIME_Relative result = GNUNET_TIME_UNIT_FOREVER_REL;
936 GNUNET_assert (n->primary_address.session != NULL);
937 if ( ((NULL == (papi = GST_plugins_find (n->primary_address.address->transport_name)) ||
938 (-1 == papi->send (papi->cls,
939 n->primary_address.session,
942 (result = (GNUNET_NO == use_keepalive_timeout) ? timeout :
943 GNUNET_TIME_relative_divide (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
944 papi->query_keepalive_factor (papi->cls))),
945 cont, cont_cls)))) &&
947 cont (cont_cls, &n->id, GNUNET_SYSERR, msgbuf_size, 0);
948 GST_neighbours_notify_data_sent (&n->id,
949 n->primary_address.address, n->primary_address.session, msgbuf_size);
950 GNUNET_break (NULL != papi);
956 * Master task run for every neighbour. Performs all of the time-related
957 * activities (keep alive, send next message, disconnect if idle, finish
958 * clean up after disconnect).
960 * @param cls the `struct NeighbourMapEntry` for which we are running
961 * @param tc scheduler context (unused)
964 master_task (void *cls,
965 const struct GNUNET_SCHEDULER_TaskContext *tc);
969 * Function called when the 'DISCONNECT' message has been sent by the
970 * plugin. Frees the neighbour --- if the entry still exists.
973 * @param target identity of the neighbour that was disconnected
974 * @param result #GNUNET_OK if the disconnect got out successfully
975 * @param payload bytes payload
976 * @param physical bytes physical
979 send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
980 int result, size_t payload, size_t physical)
982 struct NeighbourMapEntry *n;
984 n = lookup_neighbour (target);
986 return; /* already gone */
987 if (GNUNET_TRANSPORT_PS_DISCONNECT != n->state)
988 return; /* have created a fresh entry since */
989 if (GNUNET_SCHEDULER_NO_TASK != n->task)
990 GNUNET_SCHEDULER_cancel (n->task);
991 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
996 * Transmit a DISCONNECT message to the other peer.
998 * @param n neighbour to send DISCONNECT message.
1001 send_disconnect (struct NeighbourMapEntry *n)
1003 struct SessionDisconnectMessage disconnect_msg;
1005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1006 "Sending DISCONNECT message to peer `%4s'\n",
1007 GNUNET_i2s (&n->id));
1008 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
1009 disconnect_msg.header.type =
1010 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1011 disconnect_msg.reserved = htonl (0);
1012 disconnect_msg.purpose.size =
1013 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
1014 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
1015 sizeof (struct GNUNET_TIME_AbsoluteNBO));
1016 disconnect_msg.purpose.purpose =
1017 htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1018 disconnect_msg.timestamp =
1019 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1020 disconnect_msg.public_key = GST_my_identity.public_key;
1021 GNUNET_assert (GNUNET_OK ==
1022 GNUNET_CRYPTO_eddsa_sign (GST_my_private_key,
1023 &disconnect_msg.purpose,
1024 &disconnect_msg.signature));
1026 (void) send_with_session (n,
1027 (const char *) &disconnect_msg, sizeof (disconnect_msg),
1028 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1029 GNUNET_NO, &send_disconnect_cont, NULL);
1030 GNUNET_STATISTICS_update (GST_stats,
1032 ("# DISCONNECT messages sent"), 1,
1038 * Disconnect from the given neighbour, clean up the record.
1040 * @param n neighbour to disconnect from
1043 disconnect_neighbour (struct NeighbourMapEntry *n)
1045 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1046 "Disconnecting from peer %s in state %s\n",
1047 GNUNET_i2s (&n->id),
1048 GNUNET_TRANSPORT_ps2s (n->state));
1049 /* depending on state, notify neighbour and/or upper layers of this peer
1053 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
1054 case GNUNET_TRANSPORT_PS_INIT_ATS:
1055 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
1056 /* other peer is completely unaware of us, no need to send DISCONNECT */
1057 free_neighbour (n, GNUNET_NO);
1059 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
1060 send_disconnect (n);
1061 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1063 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
1064 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
1065 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
1066 /* we never ACK'ed the other peer's request, no need to send DISCONNECT */
1067 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED);
1068 free_neighbour (n, GNUNET_NO);
1070 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
1071 /* we DID ACK the other peer's request, must send DISCONNECT */
1072 send_disconnect (n);
1073 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1075 case GNUNET_TRANSPORT_PS_CONNECTED:
1076 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
1077 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1078 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
1079 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
1080 /* we are currently connected, need to send disconnect and do
1081 internal notifications and update statistics */
1082 send_disconnect (n);
1083 GNUNET_STATISTICS_set (GST_stats,
1084 gettext_noop ("# peers connected"),
1085 --neighbours_connected,
1087 disconnect_notify_cb (callback_cls, &n->id);
1088 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1090 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
1091 /* ATS address request timeout, disconnect without sending disconnect message */
1092 GNUNET_STATISTICS_set (GST_stats,
1093 gettext_noop ("# peers connected"),
1094 --neighbours_connected,
1096 disconnect_notify_cb (callback_cls, &n->id);
1097 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1099 case GNUNET_TRANSPORT_PS_DISCONNECT:
1100 /* already disconnected, ignore */
1102 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
1103 /* already cleaned up, how did we get here!? */
1107 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1108 "Unhandled state `%s'\n",
1109 GNUNET_TRANSPORT_ps2s (n->state));
1113 /* schedule timeout to clean up */
1114 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1115 GNUNET_SCHEDULER_cancel (n->task);
1116 n->task = GNUNET_SCHEDULER_add_delayed (DISCONNECT_SENT_TIMEOUT,
1122 * We're done with our transmission attempt, continue processing.
1124 * @param cls the `struct MessageQueue` of the message
1125 * @param receiver intended receiver
1126 * @param success whether it worked or not
1127 * @param size_payload bytes payload sent
1128 * @param physical bytes sent on wire
1131 transmit_send_continuation (void *cls,
1132 const struct GNUNET_PeerIdentity *receiver,
1133 int success, size_t size_payload, size_t physical)
1135 struct MessageQueue *mq = cls;
1136 struct NeighbourMapEntry *n;
1138 if (NULL == (n = lookup_neighbour (receiver)))
1141 return; /* disconnect or other error while transmitting, can happen */
1143 if (n->is_active == mq)
1145 /* this is still "our" neighbour, remove us from its queue
1146 and allow it to send the next message now */
1147 n->is_active = NULL;
1148 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1149 GNUNET_SCHEDULER_cancel (n->task);
1150 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1152 if (bytes_in_send_queue < mq->message_buf_size)
1154 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1155 "Bytes_in_send_queue `%u', Message_size %u, result: %s, payload %u, on wire %u\n",
1156 bytes_in_send_queue, mq->message_buf_size,
1157 (GNUNET_OK == success) ? "OK" : "FAIL",
1158 size_payload, physical);
1163 GNUNET_break (size_payload == mq->message_buf_size);
1164 bytes_in_send_queue -= mq->message_buf_size;
1165 GNUNET_STATISTICS_set (GST_stats,
1167 ("# bytes in message queue for other peers"),
1168 bytes_in_send_queue, GNUNET_NO);
1169 if (GNUNET_OK == success)
1170 GNUNET_STATISTICS_update (GST_stats,
1172 ("# messages transmitted to other peers"),
1175 GNUNET_STATISTICS_update (GST_stats,
1177 ("# transmission failures for messages to other peers"),
1179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1180 "Sending message to `%s' of type %u was a %s\n",
1181 GNUNET_i2s (receiver),
1182 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
1183 (success == GNUNET_OK) ? "success" : "FAILURE");
1184 if (NULL != mq->cont)
1185 mq->cont (mq->cont_cls, success, size_payload, physical);
1191 * Check the message list for the given neighbour and if we can
1192 * send a message, do so. This function should only be called
1193 * if the connection is at least generally ready for transmission.
1194 * While we will only send one message at a time, no bandwidth
1195 * quota management is performed here. If a message was given to
1196 * the plugin, the continuation will automatically re-schedule
1197 * the 'master' task once the next message might be transmitted.
1199 * @param n target peer for which to transmit
1202 try_transmission_to_peer (struct NeighbourMapEntry *n)
1204 struct MessageQueue *mq;
1205 struct GNUNET_TIME_Relative timeout;
1207 if (NULL == n->primary_address.address)
1209 /* no address, why are we here? */
1213 if ((0 == n->primary_address.address->address_length) &&
1214 (NULL == n->primary_address.session))
1216 /* no address, why are we here? */
1220 if (NULL != n->is_active)
1222 /* transmission already pending */
1226 /* timeout messages from the queue that are past their due date */
1227 while (NULL != (mq = n->messages_head))
1229 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1230 if (timeout.rel_value_us > 0)
1232 GNUNET_STATISTICS_update (GST_stats,
1234 ("# messages timed out while in transport queue"),
1236 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1238 transmit_send_continuation (mq, &n->id,
1240 mq->message_buf_size, 0); /* timeout */
1243 return; /* no more messages */
1244 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1246 (void) send_with_session (n,
1247 mq->message_buf, mq->message_buf_size,
1248 0 /* priority */, timeout, GNUNET_NO,
1249 &transmit_send_continuation, mq);
1254 * Send keepalive message to the neighbour. Must only be called
1255 * if we are on 'connected' state or while trying to switch addresses.
1256 * Will internally determine if a keepalive is truly needed (so can
1257 * always be called).
1259 * @param n neighbour that went idle and needs a keepalive
1262 send_keepalive (struct NeighbourMapEntry *n)
1264 struct SessionKeepAliveMessage m;
1265 struct GNUNET_TIME_Relative timeout;
1268 GNUNET_assert ((GNUNET_TRANSPORT_PS_CONNECTED == n->state) ||
1269 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
1270 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT));
1271 if (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time).rel_value_us > 0)
1272 return; /* no keepalive needed at this time */
1274 nonce = 0; /* 0 indicates 'not set' */
1276 nonce = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
1278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1279 "Sending keep alive to peer `%s' with nonce %u\n",
1280 GNUNET_i2s (&n->id), nonce);
1282 m.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1283 m.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
1284 m.nonce = htonl (nonce);
1286 timeout = send_with_session (n,
1287 (const void *) &m, sizeof (m),
1288 UINT32_MAX /* priority */,
1289 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1291 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
1293 n->primary_address.keep_alive_nonce = nonce;
1294 n->expect_latency_response = GNUNET_YES;
1295 n->last_keep_alive_time = GNUNET_TIME_absolute_get ();
1296 n->keep_alive_time = GNUNET_TIME_relative_to_absolute (timeout);
1302 * Keep the connection to the given neighbour alive longer,
1303 * we received a KEEPALIVE (or equivalent); send a response.
1305 * @param neighbour neighbour to keep alive (by sending keep alive response)
1306 * @param m the keep alive message containing the nonce to respond to
1309 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
1310 const struct GNUNET_MessageHeader *m)
1312 struct NeighbourMapEntry *n;
1313 const struct SessionKeepAliveMessage *msg_in;
1314 struct SessionKeepAliveMessage msg;
1316 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1319 msg_in = (struct SessionKeepAliveMessage *) m;
1320 if (NULL == (n = lookup_neighbour (neighbour)))
1322 GNUNET_STATISTICS_update (GST_stats,
1324 ("# KEEPALIVE messages discarded (peer unknown)"),
1328 if (NULL == n->primary_address.session)
1330 GNUNET_STATISTICS_update (GST_stats,
1332 ("# KEEPALIVE messages discarded (no session)"),
1337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1338 "Received keep alive request from peer `%s' with nonce %u\n",
1339 GNUNET_i2s (&n->id), ntohl (msg_in->nonce));
1341 /* send reply to allow neighbour to measure latency */
1342 msg.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1343 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE);
1344 msg.nonce = msg_in->nonce;
1345 (void) send_with_session(n,
1346 (const void *) &msg, sizeof (struct SessionKeepAliveMessage),
1347 UINT32_MAX /* priority */,
1348 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1354 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
1355 * latency to this peer. Pass the updated information (existing ats
1356 * plus calculated latency) to ATS.
1358 * @param neighbour neighbour to keep alive
1359 * @param m the message containing the keep alive response
1362 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
1363 const struct GNUNET_MessageHeader *m)
1365 struct NeighbourMapEntry *n;
1366 const struct SessionKeepAliveMessage *msg;
1367 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1369 struct GNUNET_ATS_Information ats;
1371 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1374 msg = (const struct SessionKeepAliveMessage *) m;
1375 if (NULL == (n = lookup_neighbour (neighbour)))
1377 GNUNET_STATISTICS_update (GST_stats,
1379 ("# KEEPALIVE_RESPONSE messages discarded (not connected)"),
1383 if ( (GNUNET_TRANSPORT_PS_CONNECTED != n->state) ||
1384 (GNUNET_YES != n->expect_latency_response) )
1386 GNUNET_STATISTICS_update (GST_stats,
1388 ("# KEEPALIVE_RESPONSE messages discarded (not expected)"),
1392 if (NULL == n->primary_address.address)
1394 GNUNET_STATISTICS_update (GST_stats,
1396 ("# KEEPALIVE_RESPONSE messages discarded (address changed)"),
1400 if (n->primary_address.keep_alive_nonce != ntohl (msg->nonce))
1402 GNUNET_STATISTICS_update (GST_stats,
1404 ("# KEEPALIVE_RESPONSE messages discarded (wrong nonce)"),
1410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1411 "Received keep alive response from peer `%s' for session %p\n",
1412 GNUNET_i2s (&n->id), n->primary_address.session);
1416 /* Update session timeout here */
1417 if (NULL != (papi = GST_plugins_find (n->primary_address.address->transport_name)))
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1420 "Updating session for peer `%s' for session %p\n",
1421 GNUNET_i2s (&n->id), n->primary_address.session);
1422 papi->update_session_timeout (papi->cls, &n->id, n->primary_address.session);
1429 n->primary_address.keep_alive_nonce = 0;
1430 n->expect_latency_response = GNUNET_NO;
1431 n->latency = GNUNET_TIME_absolute_get_duration (n->last_keep_alive_time);
1432 set_timeout (n, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
1434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1435 "Latency for peer `%s' is %s\n",
1436 GNUNET_i2s (&n->id),
1437 GNUNET_STRINGS_relative_time_to_string (n->latency,
1439 /* append latency */
1440 ats.type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
1441 if (n->latency.rel_value_us > UINT32_MAX)
1442 latency = UINT32_MAX;
1444 latency = n->latency.rel_value_us;
1445 ats.value = htonl (latency);
1446 GST_ats_update_metrics (&n->id, n->primary_address.address,
1447 n->primary_address.session, &ats, 1);
1452 * We have received a message from the given sender. How long should
1453 * we delay before receiving more? (Also used to keep the peer marked
1456 * @param sender sender of the message
1457 * @param size size of the message
1458 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
1459 * #GNUNET_NO if the neighbour is not connected or violates the quota,
1460 * #GNUNET_SYSERR if the connection is not fully up yet
1461 * @return how long to wait before reading more from this sender
1463 struct GNUNET_TIME_Relative
1464 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1465 *sender, ssize_t size, int *do_forward)
1467 struct NeighbourMapEntry *n;
1468 struct GNUNET_TIME_Relative ret;
1470 if (NULL == neighbours)
1472 *do_forward = GNUNET_NO;
1473 return GNUNET_TIME_UNIT_FOREVER_REL; /* This can happen during shutdown */
1475 if (NULL == (n = lookup_neighbour (sender)))
1477 GST_neighbours_try_connect (sender);
1478 if (NULL == (n = lookup_neighbour (sender)))
1480 GNUNET_STATISTICS_update (GST_stats,
1482 ("# messages discarded due to lack of neighbour record"),
1484 *do_forward = GNUNET_NO;
1485 return GNUNET_TIME_UNIT_ZERO;
1488 if (! test_connected (n))
1490 *do_forward = GNUNET_SYSERR;
1491 return GNUNET_TIME_UNIT_ZERO;
1493 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1495 n->quota_violation_count++;
1496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1497 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1498 n->in_tracker.available_bytes_per_s__,
1499 n->quota_violation_count);
1500 /* Discount 32k per violation */
1501 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1505 if (n->quota_violation_count > 0)
1507 /* try to add 32k back */
1508 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1509 n->quota_violation_count--;
1512 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1514 GNUNET_STATISTICS_update (GST_stats,
1516 ("# bandwidth quota violations by other peers"),
1518 *do_forward = GNUNET_NO;
1519 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1521 *do_forward = GNUNET_YES;
1522 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1523 if (ret.rel_value_us > 0)
1525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1526 "Throttling read (%llu bytes excess at %u b/s), waiting %s before reading more.\n",
1527 (unsigned long long) n->in_tracker.
1528 consumption_since_last_update__,
1529 (unsigned int) n->in_tracker.available_bytes_per_s__,
1530 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
1531 GNUNET_STATISTICS_update (GST_stats,
1532 gettext_noop ("# ms throttling suggested"),
1533 (int64_t) ret.rel_value_us / 1000LL,
1541 * Transmit a message to the given target using the active connection.
1543 * @param target destination
1544 * @param msg message to send
1545 * @param msg_size number of bytes in msg
1546 * @param timeout when to fail with timeout
1547 * @param cont function to call when done
1548 * @param cont_cls closure for 'cont'
1551 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1552 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1553 GST_NeighbourSendContinuation cont, void *cont_cls)
1555 struct NeighbourMapEntry *n;
1556 struct MessageQueue *mq;
1558 /* All ove these cases should never happen; they are all API violations.
1559 But we check anyway, just to be sure. */
1560 if (NULL == (n = lookup_neighbour (target)))
1564 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1567 if (GNUNET_YES != test_connected (n))
1571 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1574 bytes_in_send_queue += msg_size;
1575 GNUNET_STATISTICS_set (GST_stats,
1577 ("# bytes in message queue for other peers"),
1578 bytes_in_send_queue, GNUNET_NO);
1579 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1581 mq->cont_cls = cont_cls;
1582 memcpy (&mq[1], msg, msg_size);
1583 mq->message_buf = (const char *) &mq[1];
1584 mq->message_buf_size = msg_size;
1585 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1586 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1587 if ( (NULL != n->is_active) ||
1588 ( (NULL == n->primary_address.session) && (NULL == n->primary_address.address)) )
1590 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1591 GNUNET_SCHEDULER_cancel (n->task);
1592 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1596 send_session_connect_cont (void *cls,
1597 const struct GNUNET_PeerIdentity *target,
1599 size_t size_payload,
1600 size_t size_on_wire)
1602 struct NeighbourMapEntry *n;
1604 n = lookup_neighbour (target);
1607 GNUNET_break (0); /* TESTING */
1611 if (GNUNET_TRANSPORT_PS_CONNECT_SENT != n->state)
1613 GNUNET_break (0); /* TESTING */
1616 if (GNUNET_OK == result)
1619 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1620 _("Failed to send CONNECT message to peer `%s'\n"),
1621 (GNUNET_OK == result) ? "OK" : "ERROR");
1623 /* Failed to send CONNECT message with this address */
1624 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1625 n->primary_address.session);
1626 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1629 /* Remove address and request and additional one */
1630 unset_primary_address (n);
1632 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1633 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1639 * Send a SESSION_CONNECT message via the given address.
1641 * @param na address to use
1644 send_session_connect (struct NeighbourAddress *na)
1646 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1647 struct SessionConnectMessage connect_msg;
1648 struct NeighbourMapEntry *n;
1650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1651 "Sending SESSION_CONNECT message to peer %s\n",
1652 GNUNET_i2s (&na->address->peer));
1653 if (NULL == (papi = GST_plugins_find (na->address->transport_name)))
1658 if (NULL == na->session)
1659 na->session = papi->get_session (papi->cls, na->address);
1660 if (NULL == na->session)
1665 GNUNET_STATISTICS_update (GST_stats,
1667 ("# SESSION_CONNECT messages sent"),
1669 na->connect_timestamp = GNUNET_TIME_absolute_get ();
1670 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1671 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1672 connect_msg.reserved = htonl (0);
1673 connect_msg.timestamp = GNUNET_TIME_absolute_hton (na->connect_timestamp);
1675 papi->send (papi->cls,
1677 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1679 SETUP_CONNECTION_TIMEOUT,
1680 send_session_connect_cont, NULL))
1682 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1683 _("Failed to transmit CONNECT message via plugin to %s\n"),
1684 GST_plugins_a2s (na->address));
1686 n = lookup_neighbour (&na->address->peer);
1692 /* Hard failure to send the CONNECT message with this address:
1693 Destroy address and session */
1694 GNUNET_ATS_address_destroyed (GST_ats, na->address, na->session);
1695 GNUNET_ATS_address_destroyed (GST_ats, na->address, NULL);
1697 /* Remove address and request and additional one */
1698 unset_primary_address (n);
1700 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1701 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1705 GST_neighbours_notify_data_sent (&na->address->peer,
1708 sizeof (struct SessionConnectMessage));
1714 * Send a SESSION_CONNECT_ACK message via the given address.
1716 * @param address address to use
1717 * @param session session to use
1718 * @param timestamp timestamp to use for the ACK message
1721 send_session_connect_ack_message (const struct GNUNET_HELLO_Address *address,
1722 struct Session *session,
1723 struct GNUNET_TIME_Absolute timestamp)
1725 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1726 struct SessionConnectMessage connect_msg;
1728 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1729 "Sending CONNECT_ACK to peer `%s'\n",
1730 GNUNET_i2s (&address->peer));
1731 if (NULL == (papi = GST_plugins_find (address->transport_name)))
1736 if (NULL == session)
1737 session = papi->get_session (papi->cls, address);
1738 if (NULL == session)
1743 GNUNET_STATISTICS_update (GST_stats,
1745 ("# CONNECT_ACK messages sent"),
1747 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1748 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1749 connect_msg.reserved = htonl (0);
1750 connect_msg.timestamp = GNUNET_TIME_absolute_hton (timestamp);
1751 (void) papi->send (papi->cls,
1753 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1755 GNUNET_TIME_UNIT_FOREVER_REL,
1760 struct QuotaNotificationRequest
1762 struct GNUNET_PeerIdentity peer;
1763 struct Session *session;
1767 struct QNR_LookContext
1769 struct GNUNET_PeerIdentity peer;
1770 struct Session *session;
1773 struct QuotaNotificationRequest *res;
1777 find_notification_request (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1779 struct QNR_LookContext *qnr_ctx = cls;
1780 struct QuotaNotificationRequest *qnr = value;
1782 if ((qnr->session == qnr_ctx->session) &&
1783 (0 == memcmp (&qnr->peer, &qnr_ctx->peer, sizeof (struct GNUNET_PeerIdentity))) &&
1784 (0 == strcmp(qnr_ctx->plugin, qnr->plugin)))
1786 qnr_ctx->res = value;
1793 GST_neighbours_register_quota_notification(void *cls,
1794 const struct GNUNET_PeerIdentity *peer, const char *plugin,
1795 struct Session *session)
1797 struct QuotaNotificationRequest *qnr;
1798 struct QNR_LookContext qnr_ctx;
1800 if (NULL == registered_quota_notifications)
1802 return; /* init or shutdown */
1805 qnr_ctx.peer = (*peer);
1806 qnr_ctx.plugin = plugin;
1807 qnr_ctx.session = session;
1810 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
1811 peer, &find_notification_request, &qnr_ctx);
1812 if (NULL != qnr_ctx.res)
1818 qnr = GNUNET_new (struct QuotaNotificationRequest);
1819 qnr->peer = (*peer);
1820 qnr->plugin = GNUNET_strdup (plugin);
1821 qnr->session = session;
1823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1824 "Adding notification for peer `%s' plugin `%s' session %p \n",
1825 GNUNET_i2s (peer), plugin, session);
1827 GNUNET_CONTAINER_multipeermap_put (registered_quota_notifications, peer,
1828 qnr, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
1833 GST_neighbours_unregister_quota_notification(void *cls,
1834 const struct GNUNET_PeerIdentity *peer, const char *plugin, struct Session *session)
1836 struct QNR_LookContext qnr_ctx;
1838 if (NULL == registered_quota_notifications)
1840 return; /* init or shutdown */
1843 qnr_ctx.peer = (*peer);
1844 qnr_ctx.plugin = plugin;
1845 qnr_ctx.session = session;
1848 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
1849 &find_notification_request, &qnr_ctx);
1850 if (NULL == qnr_ctx.res)
1856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1857 "Removing notification for peer `%s' plugin `%s' session %p \n",
1858 GNUNET_i2s (peer), plugin, session);
1860 GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, peer,
1862 GNUNET_free (qnr_ctx.res->plugin);
1863 GNUNET_free (qnr_ctx.res);
1867 notification_cb(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1869 /* struct NeighbourMapEntry *n = cls; */
1870 struct QuotaNotificationRequest *qnr = value;
1871 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1872 struct GNUNET_TIME_Relative delay;
1875 papi = GST_plugins_find(qnr->plugin);
1882 delay = GST_neighbours_calculate_receive_delay (key, 0, &do_forward);
1883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1884 "New inbound delay for peer `%s' is %llu ms\n", GNUNET_i2s (key),
1885 delay.rel_value_us / 1000);
1887 if (NULL != papi->update_inbound_delay)
1888 papi->update_inbound_delay (papi->cls, key, qnr->session, delay);
1894 free_notification_cb(void *cls, const struct GNUNET_PeerIdentity *key,
1897 /* struct NeighbourMapEntry *n = cls; */
1898 struct QuotaNotificationRequest *qnr = value;
1900 GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, key,
1902 GNUNET_free(qnr->plugin);
1909 inbound_bw_tracker_update(void *cls)
1911 struct NeighbourMapEntry *n = cls;
1913 /* Quota was updated, tell plugins to update the time to receive next */
1914 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
1915 &n->id, ¬ification_cb, n);
1920 * Create a fresh entry in the neighbour map for the given peer
1922 * @param peer peer to create an entry for
1923 * @return new neighbour map entry
1925 static struct NeighbourMapEntry *
1926 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
1928 struct NeighbourMapEntry *n;
1930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1931 "Creating new neighbour entry for `%s'\n",
1933 n = GNUNET_new (struct NeighbourMapEntry);
1935 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
1936 n->last_util_transmission = GNUNET_TIME_absolute_get();
1937 n->util_payload_bytes_recv = 0;
1938 n->util_payload_bytes_sent = 0;
1939 n->util_total_bytes_recv = 0;
1940 n->util_total_bytes_sent = 0;
1941 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker, &inbound_bw_tracker_update, n,
1942 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
1943 MAX_BANDWIDTH_CARRY_S);
1944 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1945 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_FOREVER_ABS);
1946 GNUNET_assert (GNUNET_OK ==
1947 GNUNET_CONTAINER_multipeermap_put (neighbours,
1949 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1955 * Check if the two given addresses are the same.
1956 * Actually only checks if the sessions are non-NULL
1957 * (which they should be) and then if they are identical;
1958 * the actual addresses don't matter if the session
1959 * pointers match anyway, and we must have session pointers
1962 * @param a1 first address to compare
1963 * @param a2 other address to compare
1964 * @return #GNUNET_NO if the addresses do not match, #GNUNET_YES if they do match
1967 address_matches (const struct NeighbourAddress *a1,
1968 const struct NeighbourAddress *a2)
1970 if ( (NULL == a1->session) ||
1971 (NULL == a2->session) )
1976 return (a1->session == a2->session) ? GNUNET_YES : GNUNET_NO;
1980 /* We received a address suggestion after requesting an address in
1981 * try_connect or after receiving a connect, switch to address
1984 address_suggest_cont (void *cls,
1985 const struct GNUNET_PeerIdentity *peer,
1986 const struct GNUNET_HELLO_Address *address, struct Session *session,
1987 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
1988 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
1989 const struct GNUNET_ATS_Information *ats, uint32_t ats_count)
1991 GST_neighbours_switch_to_address(peer, address, session, ats, ats_count,
1992 bandwidth_in, bandwidth_out);
1996 struct BlacklistCheckSwitchContext
1998 struct BlacklistCheckSwitchContext *prev;
1999 struct BlacklistCheckSwitchContext *next;
2002 struct GST_BlacklistCheck *blc;
2004 struct GNUNET_HELLO_Address *address;
2005 struct Session *session;
2006 struct GNUNET_ATS_Information *ats;
2009 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
2010 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
2014 * Black list check result for try_connect call
2015 * If connection to the peer is allowed request adddress and
2017 * @param cls blc_ctx bl context
2018 * @param peer the peer
2019 * @param result the result
2022 try_connect_bl_check_cont (void *cls,
2023 const struct GNUNET_PeerIdentity *peer, int result)
2025 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2026 struct NeighbourMapEntry *n;
2028 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2029 GNUNET_free (blc_ctx);
2031 if (GNUNET_OK != result)
2033 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2034 _("Blacklisting disapproved to connect to peer `%s'\n"),
2039 /* Setup a new neighbour */
2040 n = setup_neighbour (peer);
2042 /* Request address suggestions for this peer */
2043 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
2044 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2045 GNUNET_ATS_reset_backoff (GST_ats, peer);
2046 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer,
2047 &address_suggest_cont, n);
2053 * Try to create a connection to the given target (eventually).
2055 * @param target peer to try to connect to
2058 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
2060 struct NeighbourMapEntry *n;
2061 struct GST_BlacklistCheck *blc;
2062 struct BlacklistCheckSwitchContext *blc_ctx;
2064 if (NULL == neighbours)
2066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2067 "Asked to connect to peer `%s' during shutdown\n",
2068 GNUNET_i2s (target));
2069 return; /* during shutdown, do nothing */
2071 n = lookup_neighbour (target);
2072 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2073 "Asked to connect to peer `%s' (state: %s)\n",
2074 GNUNET_i2s (target),
2075 (NULL != n) ? GNUNET_TRANSPORT_ps2s(n->state) : "NEW PEER");
2080 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2081 /* this should not be possible */
2083 free_neighbour (n, GNUNET_NO);
2085 case GNUNET_TRANSPORT_PS_INIT_ATS:
2086 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
2087 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2088 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
2089 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2090 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
2091 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2092 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2093 "Ignoring request to try to connect to `%s', already trying!\n",
2094 GNUNET_i2s (target));
2095 return; /* already trying */
2096 case GNUNET_TRANSPORT_PS_CONNECTED:
2097 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2098 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
2099 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2100 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
2101 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2102 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2103 "Ignoring request to try to connect, already connected to `%s'!\n",
2104 GNUNET_i2s (target));
2105 return; /* already connected */
2106 case GNUNET_TRANSPORT_PS_DISCONNECT:
2107 /* get rid of remains, ready to re-try immediately */
2108 free_neighbour (n, GNUNET_NO);
2110 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2111 /* should not be possible */
2114 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2115 "Unhandled state `%s'\n",
2116 GNUNET_TRANSPORT_ps2s (n->state));
2118 free_neighbour (n, GNUNET_NO);
2123 /* Do blacklist check if connecting to this peer is allowed */
2124 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2125 GNUNET_CONTAINER_DLL_insert (pending_bc_head, pending_bc_tail, blc_ctx);
2127 if (NULL != (blc = GST_blacklist_test_allowed (target, NULL,
2128 &try_connect_bl_check_cont, blc_ctx)))
2136 * Function called with the result of a blacklist check.
2138 * @param cls closure with the `struct BlackListCheckContext`
2139 * @param peer peer this check affects
2140 * @param result #GNUNET_OK if the address is allowed
2143 handle_test_blacklist_cont (void *cls,
2144 const struct GNUNET_PeerIdentity *peer,
2147 struct BlackListCheckContext *bcc = cls;
2148 struct NeighbourMapEntry *n;
2151 GNUNET_CONTAINER_DLL_remove (bc_head,
2154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2155 "Connection to new address of peer `%s' based on blacklist is `%s'\n",
2157 (GNUNET_OK == result) ? "allowed" : "FORBIDDEN");
2158 if (GNUNET_OK == result)
2160 GST_ats_add_address (bcc->na.address, bcc->na.session, NULL, 0);
2164 /* Blacklist disagreed on connecting to a peer with this address
2165 * Destroy address because we are not allowed to use it
2167 if (NULL != bcc->na.session)
2168 GNUNET_ATS_address_destroyed (GST_ats, bcc->na.address, bcc->na.session);
2169 GNUNET_ATS_address_destroyed (GST_ats, bcc->na.address, NULL);
2171 if (NULL == (n = lookup_neighbour (peer)))
2173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2174 "No neighbor entry for peer `%s', ignoring blacklist result\n",
2176 goto cleanup; /* nobody left to care about new address */
2178 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2179 "Received blacklist result for peer `%s' in state %s/%d\n",
2181 GNUNET_TRANSPORT_ps2s (n->state),
2182 n->send_connect_ack);
2185 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2186 /* this should not be possible */
2188 free_neighbour (n, GNUNET_NO);
2190 case GNUNET_TRANSPORT_PS_INIT_ATS:
2191 /* waiting on ATS suggestion; still, pass address to ATS as a
2194 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
2195 /* check if the address the blacklist was fine with matches
2196 ATS suggestion, if so, we can move on! */
2197 if ( (GNUNET_OK == result) &&
2198 (1 == n->send_connect_ack) )
2200 n->send_connect_ack = 2;
2201 send_session_connect_ack_message (bcc->na.address,
2203 n->connect_ack_timestamp);
2205 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2208 "Blacklist result for peer %s is for non-primary address, ignored\n",
2210 break; /* result for an address we currently don't care about */
2212 if (GNUNET_OK == result)
2214 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_SENT,
2215 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2216 send_session_connect (&n->primary_address);
2220 free_address (&n->primary_address);
2222 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
2223 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2226 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2227 /* waiting on CONNECT_ACK, send ACK if one is pending */
2228 if ( (GNUNET_OK == result) &&
2229 (1 == n->send_connect_ack) )
2231 n->send_connect_ack = 2;
2232 send_session_connect_ack_message (n->primary_address.address,
2233 n->primary_address.session,
2234 n->connect_ack_timestamp);
2237 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
2238 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS,
2239 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2240 GNUNET_ATS_reset_backoff (GST_ats, peer);
2241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2242 "Suggesting address for peer %s to ATS\n",
2244 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer,
2245 &address_suggest_cont, n);
2247 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2248 /* waiting on ATS suggestion, don't care about blacklist */
2250 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
2251 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2254 "Blacklist result ignored, as it is not for our primary address\n");
2255 break; /* result for an address we currently don't care about */
2257 if (GNUNET_OK == result)
2259 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK,
2260 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2261 send_session_connect_ack_message (bcc->na.address,
2263 n->connect_ack_timestamp);
2264 if (1 == n->send_connect_ack)
2265 n->send_connect_ack = 2;
2269 struct GNUNET_TRANSPORT_PluginFunctions *plugin;
2271 plugin = GST_plugins_find (bcc->na.address->transport_name);
2272 if ( (NULL != plugin) &&
2273 (NULL != bcc->na.session) )
2275 plugin->disconnect_session (plugin->cls,
2279 GNUNET_break (NULL != plugin);
2280 free_address (&n->primary_address);
2281 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
2282 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2283 GNUNET_ATS_reset_backoff (GST_ats, peer);
2286 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2287 /* waiting on SESSION_ACK, send ACK if one is pending */
2288 if ( (GNUNET_OK == result) &&
2289 (1 == n->send_connect_ack) )
2291 n->send_connect_ack = 2;
2292 send_session_connect_ack_message (n->primary_address.address,
2293 n->primary_address.session,
2294 n->connect_ack_timestamp);
2297 case GNUNET_TRANSPORT_PS_CONNECTED:
2298 /* already connected, don't care about blacklist */
2300 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2301 /* still waiting on ATS suggestion, don't care about blacklist */
2303 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
2304 if ( (GNUNET_OK == result) &&
2305 (1 == n->send_connect_ack) )
2307 n->send_connect_ack = 2;
2308 send_session_connect_ack_message (bcc->na.address,
2310 n->connect_ack_timestamp);
2312 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2315 "Blacklist result ignored, as it is not for our primary address\n");
2316 break; /* result for an address we currently don't care about */
2318 if (GNUNET_OK == result)
2320 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2321 send_session_connect (&n->primary_address);
2325 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2328 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2329 /* waiting on CONNECT_ACK, don't care about blacklist */
2330 if ( (GNUNET_OK == result) &&
2331 (1 == n->send_connect_ack) )
2333 n->send_connect_ack = 2;
2334 send_session_connect_ack_message (n->primary_address.address,
2335 n->primary_address.session,
2336 n->connect_ack_timestamp);
2339 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
2340 if (GNUNET_YES != address_matches (&bcc->na, &n->alternative_address))
2342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2343 "Blacklist result ignored, as it is not for our primary address\n");
2344 break; /* result for an address we currently don't care about */
2346 if (GNUNET_OK == result)
2348 send_session_connect (&n->alternative_address);
2349 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT);
2353 set_state(n, GNUNET_TRANSPORT_PS_CONNECTED);
2354 free_address (&n->alternative_address);
2357 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2358 /* waiting on CONNECT_ACK, don't care about blacklist */
2359 if ( (GNUNET_OK == result) &&
2360 (1 == n->send_connect_ack) )
2362 n->send_connect_ack = 2;
2363 send_session_connect_ack_message (n->primary_address.address,
2364 n->primary_address.session,
2365 n->connect_ack_timestamp);
2368 case GNUNET_TRANSPORT_PS_DISCONNECT:
2369 /* Nothing to do here, ATS will already do what can be done */
2371 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2372 /* should not be possible */
2376 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2377 "Unhandled state `%s'\n",
2378 GNUNET_TRANSPORT_ps2s (n->state));
2380 free_neighbour (n, GNUNET_NO);
2384 GNUNET_HELLO_address_free (bcc->na.address);
2390 * We want to know if connecting to a particular peer via
2391 * a particular address is allowed. Check it!
2393 * @param peer identity of the peer to switch the address for
2394 * @param ts time at which the check was initiated
2395 * @param address address of the other peer, NULL if other peer
2397 * @param session session to use (or NULL)
2400 check_blacklist (const struct GNUNET_PeerIdentity *peer,
2401 struct GNUNET_TIME_Absolute ts,
2402 const struct GNUNET_HELLO_Address *address,
2403 struct Session *session)
2405 struct BlackListCheckContext *bcc;
2406 struct GST_BlacklistCheck *bc;
2408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2409 "Checking peer `%s' against blacklist\n",
2411 bcc = GNUNET_new (struct BlackListCheckContext);
2412 bcc->na.address = GNUNET_HELLO_address_copy (address);
2413 bcc->na.session = session;
2414 bcc->na.connect_timestamp = ts;
2415 GNUNET_CONTAINER_DLL_insert (bc_head,
2418 if (NULL != (bc = GST_blacklist_test_allowed (peer,
2419 address->transport_name,
2420 &handle_test_blacklist_cont, bcc)))
2422 /* if NULL == bc, 'cont' was already called and 'bcc' already free'd, so
2423 we must only store 'bc' if 'bc' is non-NULL... */
2428 * We received a 'SESSION_CONNECT' message from the other peer.
2429 * Consider switching to it.
2431 * @param message possibly a 'struct SessionConnectMessage' (check format)
2432 * @param peer identity of the peer to switch the address for
2433 * @param address address of the other peer, NULL if other peer
2435 * @param session session to use (or NULL)
2436 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
2439 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2440 const struct GNUNET_PeerIdentity *peer,
2441 const struct GNUNET_HELLO_Address *address,
2442 struct Session *session)
2444 const struct SessionConnectMessage *scm;
2445 struct NeighbourMapEntry *n;
2446 struct GNUNET_TIME_Absolute ts;
2448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2449 "Received CONNECT message from peer `%s'\n",
2451 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2453 GNUNET_break_op (0);
2454 return GNUNET_SYSERR;
2456 GNUNET_STATISTICS_update (GST_stats,
2458 ("# CONNECT messages received"),
2460 if (NULL == neighbours)
2462 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2463 _("CONNECT request from peer `%s' ignored due impending shutdown\n"),
2465 return GNUNET_OK; /* we're shutting down */
2467 scm = (const struct SessionConnectMessage *) message;
2468 GNUNET_break_op (0 == ntohl (scm->reserved));
2469 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2470 n = lookup_neighbour (peer);
2472 n = setup_neighbour (peer);
2473 n->send_connect_ack = 1;
2474 n->connect_ack_timestamp = ts;
2476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2477 "Received SESSION_CONNECT for peer `%s' in state %s/%d\n",
2479 GNUNET_TRANSPORT_ps2s (n->state),
2480 n->send_connect_ack);
2483 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2484 /* Do a blacklist check for the new address */
2485 set_state (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND);
2486 check_blacklist (peer, ts, address, session);
2488 case GNUNET_TRANSPORT_PS_INIT_ATS:
2489 /* CONNECT message takes priority over us asking ATS for address */
2490 set_state (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND);
2492 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
2493 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2494 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
2495 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2496 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
2497 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2498 /* It can never hurt to have an alternative address in the above cases,
2499 see if it is allowed */
2500 check_blacklist (peer, ts, address, session);
2502 case GNUNET_TRANSPORT_PS_CONNECTED:
2503 /* we are already connected and can thus send the ACK immediately;
2504 still, it can never hurt to have an alternative address, so also
2505 tell ATS about it */
2506 GNUNET_assert (NULL != n->primary_address.address);
2507 GNUNET_assert (NULL != n->primary_address.session);
2508 n->send_connect_ack = 0;
2509 send_session_connect_ack_message (n->primary_address.address,
2510 n->primary_address.session, ts);
2511 check_blacklist (peer, ts, address, session);
2513 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2514 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
2515 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2516 /* It can never hurt to have an alternative address in the above cases,
2517 see if it is allowed */
2518 check_blacklist (peer, ts, address, session);
2520 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
2521 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2522 /* we are already connected and can thus send the ACK immediately;
2523 still, it can never hurt to have an alternative address, so also
2524 tell ATS about it */
2525 GNUNET_assert (NULL != n->primary_address.address);
2526 GNUNET_assert (NULL != n->primary_address.session);
2527 n->send_connect_ack = 0;
2528 send_session_connect_ack_message (n->primary_address.address,
2529 n->primary_address.session, ts);
2530 check_blacklist (peer, ts, address, session);
2532 case GNUNET_TRANSPORT_PS_DISCONNECT:
2533 /* get rid of remains without terminating sessions, ready to re-try */
2534 free_neighbour (n, GNUNET_YES);
2535 n = setup_neighbour (peer);
2536 set_state (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS);
2537 GNUNET_ATS_reset_backoff (GST_ats, peer);
2539 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2540 /* should not be possible */
2544 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2545 "Unhandled state `%s'\n",
2546 GNUNET_TRANSPORT_ps2s (n->state));
2548 return GNUNET_SYSERR;
2554 switch_address_bl_check_cont (void *cls,
2555 const struct GNUNET_PeerIdentity *peer, int result)
2557 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2558 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2559 struct NeighbourMapEntry *n;
2561 if ( (NULL == (n = lookup_neighbour (peer))) || (result == GNUNET_NO) ||
2562 (NULL == (papi = GST_plugins_find (blc_ctx->address->transport_name))) )
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2567 "Peer %s is unknown, suggestion ignored\n",
2570 if (result == GNUNET_NO)
2572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2573 "Blacklist denied to switch to suggested address `%s' session %p for peer `%s'\n",
2574 GST_plugins_a2s (blc_ctx->address),
2576 GNUNET_i2s (&blc_ctx->address->peer));
2578 if (NULL == (papi = GST_plugins_find (blc_ctx->address->transport_name)))
2580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2581 "Plugin `%s' for suggested address `%s' session %p for peer `%s' is not available\n",
2582 blc_ctx->address->transport_name,
2583 GST_plugins_a2s (blc_ctx->address),
2585 GNUNET_i2s (&blc_ctx->address->peer));
2588 /* This address is blacklisted, delete address and session (if existing) in ATS */
2589 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, blc_ctx->session);
2591 if ( (GNUNET_YES == (GNUNET_HELLO_address_check_option (blc_ctx->address,
2592 GNUNET_HELLO_ADDRESS_INFO_INBOUND))) && (NULL != blc_ctx->session))
2594 /* This is an inbound address, destroy full address */
2595 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, NULL );
2598 /* Remove blacklist check and clean up */
2599 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2600 GNUNET_HELLO_address_free (blc_ctx->address);
2601 GNUNET_free_non_null (blc_ctx->ats);
2602 GNUNET_free (blc_ctx);
2606 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2607 "Blacklist accepted to switch to suggested address `%s' session %p for peer `%s'\n",
2608 GST_plugins_a2s (blc_ctx->address),
2610 GNUNET_i2s (&blc_ctx->address->peer));
2612 if (NULL == blc_ctx->session)
2614 blc_ctx->session = papi->get_session (papi->cls, blc_ctx->address);
2615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2616 "Obtained new session for peer `%s' and address '%s': %p\n",
2617 GNUNET_i2s (&blc_ctx->address->peer), GST_plugins_a2s (blc_ctx->address), blc_ctx->session);
2619 if (NULL == blc_ctx->session)
2621 /* No session could be obtained, remove blacklist check and clean up */
2622 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2623 "Failed to obtain new session for peer `%s' and address '%s'\n",
2624 GNUNET_i2s (&blc_ctx->address->peer),
2625 GST_plugins_a2s (blc_ctx->address));
2626 /* Delete address in ATS */
2627 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, NULL);
2629 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2630 GNUNET_HELLO_address_free (blc_ctx->address);
2631 GNUNET_free_non_null (blc_ctx->ats);
2632 GNUNET_free (blc_ctx);
2638 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2640 free_neighbour (n, GNUNET_NO);
2642 case GNUNET_TRANSPORT_PS_INIT_ATS:
2643 /* We requested an address and ATS suggests one:
2644 * set primary address and send CONNECT message*/
2645 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2646 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2647 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_SENT,
2648 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2649 send_session_connect (&n->primary_address);
2651 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
2652 /* ATS suggests a different address, switch again */
2653 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2654 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2655 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2656 check_blacklist (&n->id, n->connect_ack_timestamp,
2657 blc_ctx->address, blc_ctx->session);
2659 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2660 /* ATS suggests a different address, switch again */
2661 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2662 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2663 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_BLACKLIST,
2664 GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2665 check_blacklist (&n->id, n->connect_ack_timestamp,
2666 blc_ctx->address, blc_ctx->session);
2668 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2669 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2670 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2671 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST,
2672 GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2673 check_blacklist (&n->id, n->connect_ack_timestamp,
2674 blc_ctx->address, blc_ctx->session);
2676 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
2677 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2678 check_blacklist (&n->id, n->connect_ack_timestamp,
2679 blc_ctx->address, blc_ctx->session);
2681 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
2682 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2683 /* ATS asks us to switch while we were trying to connect; switch to new
2684 address and check blacklist again */
2685 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2686 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2687 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST,
2688 GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2689 check_blacklist (&n->id, n->connect_ack_timestamp,
2690 blc_ctx->address, blc_ctx->session);
2692 case GNUNET_TRANSPORT_PS_CONNECTED:
2693 GNUNET_assert (NULL != n->primary_address.address);
2694 GNUNET_assert (NULL != n->primary_address.session);
2695 if (n->primary_address.session == blc_ctx->session)
2697 /* not an address change, just a quota change */
2698 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2699 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_YES);
2702 /* ATS asks us to switch a life connection; see if we can get
2703 a CONNECT_ACK on it before we actually do this! */
2704 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST);
2705 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2706 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2707 check_blacklist (&n->id, GNUNET_TIME_absolute_get (),
2708 blc_ctx->address, blc_ctx->session);
2710 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2711 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2712 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2713 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST,
2714 GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2715 check_blacklist (&n->id, n->connect_ack_timestamp,
2716 blc_ctx->address, blc_ctx->session);
2718 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
2719 /* ATS asks us to switch while we were trying to reconnect; switch to new
2720 address and check blacklist again */
2721 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2722 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2723 set_timeout (n, GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2724 check_blacklist (&n->id, n->connect_ack_timestamp,
2725 blc_ctx->address, blc_ctx->session);
2727 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2728 /* ATS asks us to switch while we were trying to reconnect; switch to new
2729 address and check blacklist again */
2730 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2731 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2732 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST,
2733 GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT));
2734 check_blacklist (&n->id, n->connect_ack_timestamp,
2735 blc_ctx->address, blc_ctx->session);
2737 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
2738 if (n->primary_address.session == blc_ctx->session)
2740 /* ATS switches back to still-active session */
2741 set_state(n, GNUNET_TRANSPORT_PS_CONNECTED);
2742 free_address (&n->alternative_address);
2745 /* ATS asks us to switch a life connection, update blacklist check */
2746 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2747 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2748 check_blacklist (&n->id, GNUNET_TIME_absolute_get (),
2749 blc_ctx->address, blc_ctx->session);
2751 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2752 if (n->primary_address.session == blc_ctx->session)
2754 /* ATS switches back to still-active session */
2755 free_address (&n->alternative_address);
2756 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
2759 /* ATS asks us to switch a life connection, update blacklist check */
2760 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST);
2761 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2762 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2763 check_blacklist (&n->id, GNUNET_TIME_absolute_get (),
2764 blc_ctx->address, blc_ctx->session);
2766 case GNUNET_TRANSPORT_PS_DISCONNECT:
2767 /* not going to switch addresses while disconnecting */
2769 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2773 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2774 "Unhandled state `%s'\n",
2775 GNUNET_TRANSPORT_ps2s (n->state));
2780 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2781 GNUNET_HELLO_address_free(blc_ctx->address);
2782 GNUNET_free_non_null (blc_ctx->ats);
2783 GNUNET_free (blc_ctx);
2789 * For the given peer, switch to this address.
2791 * Before accepting this addresses and actively using it, a blacklist check
2792 * is performed. If this blacklist check fails the address will be destroyed.
2794 * @param peer identity of the peer to switch the address for
2795 * @param address address of the other peer,
2796 * @param session session to use or NULL if transport should initiate a session
2797 * @param ats performance data
2798 * @param ats_count number of entries in ats
2799 * @param bandwidth_in inbound quota to be used when connection is up,
2800 * 0 to disconnect from peer
2801 * @param bandwidth_out outbound quota to be used when connection is up,
2802 * 0 to disconnect from peer
2805 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
2806 const struct GNUNET_HELLO_Address *address,
2807 struct Session *session,
2808 const struct GNUNET_ATS_Information *ats,
2810 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
2811 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
2813 struct NeighbourMapEntry *n;
2814 struct GST_BlacklistCheck *blc;
2815 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2816 struct BlacklistCheckSwitchContext *blc_ctx;
2819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2820 "ATS has decided on an address for peer %s\n",
2822 GNUNET_assert (NULL != address->transport_name);
2823 if (NULL == (n = lookup_neighbour (peer)))
2825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2826 "Peer %s is unknown, suggestion ignored\n",
2831 /* Check if plugin is available */
2832 if (NULL == (papi = GST_plugins_find (address->transport_name)))
2834 /* we don't have the plugin for this address */
2835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2836 "Plugin `%s' is unknown, suggestion for peer %s ignored\n",
2837 address->transport_name,
2839 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2842 if ((NULL == session) &&
2843 (GNUNET_HELLO_address_check_option (address, GNUNET_HELLO_ADDRESS_INFO_INBOUND)))
2845 /* This is a inbound address and we do not have a session to use! */
2846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2847 "Inbound address without session `%s'! Destroying address...\n",
2848 GST_plugins_a2s (address));
2849 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2853 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2854 "ATS tells us to switch to %s address '%s' session %p for "
2855 "peer `%s' in state %s/%d (quota in/out %u %u )\n",
2856 GNUNET_HELLO_address_check_option (address,
2857 GNUNET_HELLO_ADDRESS_INFO_INBOUND) ? "inbound" : "",
2858 GST_plugins_a2s (address), session, GNUNET_i2s (peer),
2859 GNUNET_TRANSPORT_ps2s (n->state), n->send_connect_ack,
2860 ntohl (bandwidth_in.value__), ntohl (bandwidth_out.value__));
2862 /* Perform blacklist check */
2863 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2864 blc_ctx->address = GNUNET_HELLO_address_copy (address);
2865 blc_ctx->session = session;
2866 blc_ctx->bandwidth_in = bandwidth_in;
2867 blc_ctx->bandwidth_out = bandwidth_out;
2868 blc_ctx->ats_count = ats_count;
2869 blc_ctx->ats = NULL;
2872 blc_ctx->ats = GNUNET_malloc (ats_count * sizeof (struct GNUNET_ATS_Information));
2873 for (c = 0; c < ats_count; c++)
2875 blc_ctx->ats[c].type = ats[c].type;
2876 blc_ctx->ats[c].value = ats[c].value;
2880 GNUNET_CONTAINER_DLL_insert (pending_bc_head, pending_bc_tail, blc_ctx);
2881 if (NULL != (blc = GST_blacklist_test_allowed (peer, address->transport_name,
2882 &switch_address_bl_check_cont, blc_ctx)))
2890 send_utilization_data (void *cls,
2891 const struct GNUNET_PeerIdentity *key,
2894 struct NeighbourMapEntry *n = value;
2895 struct GNUNET_ATS_Information atsi[4];
2897 uint32_t bps_pl_out;
2900 struct GNUNET_TIME_Relative delta;
2902 delta = GNUNET_TIME_absolute_get_difference (n->last_util_transmission,
2903 GNUNET_TIME_absolute_get ());
2907 if ((0 != n->util_payload_bytes_recv) && (0 != delta.rel_value_us))
2908 bps_pl_in = (1000LL * 1000LL * n->util_payload_bytes_recv) / (delta.rel_value_us);
2910 if ((0 != n->util_payload_bytes_sent) && (0 != delta.rel_value_us))
2911 bps_pl_out = (1000LL * 1000LL * n->util_payload_bytes_sent) / delta.rel_value_us;
2912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2913 "`%s' payload: received %u Bytes/s, sent %u Bytes/s\n",
2918 if ((0 != n->util_total_bytes_recv) && (0 != delta.rel_value_us))
2919 bps_in = (1000LL * 1000LL * n->util_total_bytes_recv) / (delta.rel_value_us);
2921 if ((0 != n->util_total_bytes_sent) && (0 != delta.rel_value_us))
2922 bps_out = (1000LL * 1000LL * n->util_total_bytes_sent) / delta.rel_value_us;
2925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2926 "`%s' total: received %u Bytes/s, sent %u Bytes/s\n",
2930 atsi[0].type = htonl (GNUNET_ATS_UTILIZATION_OUT);
2931 atsi[0].value = htonl (bps_out);
2932 atsi[1].type = htonl (GNUNET_ATS_UTILIZATION_IN);
2933 atsi[1].value = htonl (bps_in);
2935 atsi[2].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_OUT);
2936 atsi[2].value = htonl (bps_pl_out);
2937 atsi[3].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_IN);
2938 atsi[3].value = htonl (bps_pl_in);
2940 GST_ats_update_metrics (key, n->primary_address.address,
2941 n->primary_address.session, atsi, 4);
2942 n->util_payload_bytes_recv = 0;
2943 n->util_payload_bytes_sent = 0;
2944 n->util_total_bytes_recv = 0;
2945 n->util_total_bytes_sent = 0;
2946 n->last_util_transmission = GNUNET_TIME_absolute_get();
2952 * Task transmitting utilization in a regular interval
2954 * @param cls the 'struct NeighbourMapEntry' for which we are running
2955 * @param tc scheduler context (unused)
2958 utilization_transmission (void *cls,
2959 const struct GNUNET_SCHEDULER_TaskContext *tc)
2961 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
2963 if (0 < GNUNET_CONTAINER_multipeermap_size (neighbours))
2964 GNUNET_CONTAINER_multipeermap_iterate (neighbours, send_utilization_data, NULL);
2966 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
2967 utilization_transmission, NULL);
2973 GST_neighbours_notify_data_recv (const struct GNUNET_PeerIdentity *peer,
2974 const struct GNUNET_HELLO_Address *address,
2975 struct Session *session,
2976 const struct GNUNET_MessageHeader *message)
2978 struct NeighbourMapEntry *n;
2980 n = lookup_neighbour (peer);
2983 n->util_total_bytes_recv += ntohs(message->size);
2988 GST_neighbours_notify_payload_recv (const struct GNUNET_PeerIdentity *peer,
2989 const struct GNUNET_HELLO_Address *address,
2990 struct Session *session,
2991 const struct GNUNET_MessageHeader *message)
2993 struct NeighbourMapEntry *n;
2994 n = lookup_neighbour (peer);
2997 n->util_payload_bytes_recv += ntohs(message->size);
3002 GST_neighbours_notify_data_sent (const struct GNUNET_PeerIdentity *peer,
3003 const struct GNUNET_HELLO_Address *address,
3004 struct Session *session,
3007 struct NeighbourMapEntry *n;
3008 n = lookup_neighbour (peer);
3011 if (n->primary_address.session != session)
3013 n->util_total_bytes_sent += size;
3018 GST_neighbours_notify_payload_sent (const struct GNUNET_PeerIdentity *peer,
3021 struct NeighbourMapEntry *n;
3022 n = lookup_neighbour (peer);
3025 n->util_payload_bytes_sent += size;
3030 * Master task run for every neighbour. Performs all of the time-related
3031 * activities (keep alive, send next message, disconnect if idle, finish
3032 * clean up after disconnect).
3034 * @param cls the 'struct NeighbourMapEntry' for which we are running
3035 * @param tc scheduler context (unused)
3038 master_task (void *cls,
3039 const struct GNUNET_SCHEDULER_TaskContext *tc)
3041 struct NeighbourMapEntry *n = cls;
3042 struct GNUNET_TIME_Relative delay;
3044 n->task = GNUNET_SCHEDULER_NO_TASK;
3045 delay = GNUNET_TIME_absolute_get_remaining (n->timeout);
3046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3047 "Master task runs for neighbour `%s' in state %s with timeout in %s\n",
3048 GNUNET_i2s (&n->id),
3049 GNUNET_TRANSPORT_ps2s(n->state),
3050 GNUNET_STRINGS_relative_time_to_string (delay,
3054 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3055 /* invalid state for master task, clean up */
3057 free_neighbour (n, GNUNET_NO);
3059 case GNUNET_TRANSPORT_PS_INIT_ATS:
3060 if (0 == delay.rel_value_us)
3062 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3063 "Connection to `%s' timed out waiting for ATS to provide address\n",
3064 GNUNET_i2s (&n->id));
3065 free_neighbour (n, GNUNET_NO);
3069 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
3070 if (0 == delay.rel_value_us)
3072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3073 "Connection to `%s' timed out waiting for BLACKLIST to approve address\n",
3074 GNUNET_i2s (&n->id));
3075 free_neighbour (n, GNUNET_NO);
3079 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3080 if (0 == delay.rel_value_us)
3082 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3083 "Connection to `%s' timed out waiting for other peer to send CONNECT_ACK\n",
3084 GNUNET_i2s (&n->id));
3085 /* We could not send to this address, delete address and session */
3086 if (NULL != n->primary_address.session)
3087 GNUNET_ATS_address_destroyed (GST_ats,
3088 n->primary_address.address, n->primary_address.session);
3089 GNUNET_ATS_address_destroyed (GST_ats,
3090 n->primary_address.address, NULL);
3091 disconnect_neighbour (n);
3095 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
3096 if (0 == delay.rel_value_us)
3098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3099 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for received CONNECT\n",
3100 GNUNET_i2s (&n->id));
3101 free_neighbour (n, GNUNET_NO);
3105 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3106 if (0 == delay.rel_value_us)
3108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3109 "Connection to `%s' timed out waiting ATS to provide address to use for CONNECT_ACK\n",
3110 GNUNET_i2s (&n->id));
3111 free_neighbour (n, GNUNET_NO);
3115 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
3116 if (0 == delay.rel_value_us)
3118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3119 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for CONNECT_ACK\n",
3120 GNUNET_i2s (&n->id));
3121 free_neighbour (n, GNUNET_NO);
3125 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3126 if (0 == delay.rel_value_us)
3128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3129 "Connection to `%s' timed out waiting for other peer to send SESSION_ACK\n",
3130 GNUNET_i2s (&n->id));
3131 disconnect_neighbour (n);
3135 case GNUNET_TRANSPORT_PS_CONNECTED:
3136 if (0 == delay.rel_value_us)
3138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3139 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
3140 GNUNET_i2s (&n->id));
3141 disconnect_neighbour (n);
3144 try_transmission_to_peer (n);
3147 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3148 if (0 == delay.rel_value_us)
3150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3151 "Connection to `%s' timed out, waiting for ATS replacement address\n",
3152 GNUNET_i2s (&n->id));
3153 disconnect_neighbour (n);
3157 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
3158 if (0 == delay.rel_value_us)
3160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3161 "Connection to `%s' timed out, waiting for BLACKLIST to approve replacement address\n",
3162 GNUNET_i2s (&n->id));
3163 disconnect_neighbour (n);
3167 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3168 if (0 == delay.rel_value_us)
3170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3171 "Connection to `%s' timed out, waiting for other peer to CONNECT_ACK replacement address\n",
3172 GNUNET_i2s (&n->id));
3173 disconnect_neighbour (n);
3177 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
3178 if (0 == delay.rel_value_us)
3180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3181 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
3182 GNUNET_i2s (&n->id));
3183 disconnect_neighbour (n);
3186 try_transmission_to_peer (n);
3189 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3190 if (0 == delay.rel_value_us)
3192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3193 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs (after trying to CONNECT on alternative address)\n",
3194 GNUNET_i2s (&n->id));
3195 disconnect_neighbour (n);
3198 try_transmission_to_peer (n);
3201 case GNUNET_TRANSPORT_PS_DISCONNECT:
3202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3203 "Cleaning up connection to `%s' after sending DISCONNECT\n",
3204 GNUNET_i2s (&n->id));
3205 free_neighbour (n, GNUNET_NO);
3207 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3208 /* how did we get here!? */
3212 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3213 "Unhandled state `%s'\n",
3214 GNUNET_TRANSPORT_ps2s (n->state));
3218 if ( (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT == n->state) ||
3219 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
3220 (GNUNET_TRANSPORT_PS_CONNECTED == n->state) )
3222 /* if we are *now* in one of these three states, we're sending
3223 keep alive messages, so we need to consider the keepalive
3224 delay, not just the connection timeout */
3225 delay = GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time),
3228 if (GNUNET_SCHEDULER_NO_TASK == n->task)
3229 n->task = GNUNET_SCHEDULER_add_delayed (delay,
3236 * Send a SESSION_ACK message to the neighbour to confirm that we
3237 * got his CONNECT_ACK.
3239 * @param n neighbour to send the SESSION_ACK to
3242 send_session_ack_message (struct NeighbourMapEntry *n)
3244 struct GNUNET_MessageHeader msg;
3246 msg.size = htons (sizeof (struct GNUNET_MessageHeader));
3247 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
3248 (void) send_with_session(n,
3249 (const char *) &msg, sizeof (struct GNUNET_MessageHeader),
3250 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_NO,
3256 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
3257 * Consider switching to it.
3259 * @param message possibly a 'struct SessionConnectMessage' (check format)
3260 * @param peer identity of the peer to switch the address for
3261 * @param address address of the other peer, NULL if other peer
3263 * @param session session to use (or NULL)
3264 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3267 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
3268 const struct GNUNET_PeerIdentity *peer,
3269 const struct GNUNET_HELLO_Address *address,
3270 struct Session *session)
3272 const struct SessionConnectMessage *scm;
3273 struct GNUNET_TIME_Absolute ts;
3274 struct NeighbourMapEntry *n;
3276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3277 "Received CONNECT_ACK message from peer `%s'\n",
3280 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
3282 GNUNET_break_op (0);
3283 return GNUNET_SYSERR;
3285 GNUNET_STATISTICS_update (GST_stats,
3287 ("# CONNECT_ACK messages received"),
3289 scm = (const struct SessionConnectMessage *) message;
3290 GNUNET_break_op (ntohl (scm->reserved) == 0);
3291 if (NULL == (n = lookup_neighbour (peer)))
3293 GNUNET_STATISTICS_update (GST_stats,
3295 ("# unexpected CONNECT_ACK messages (no peer)"),
3297 return GNUNET_SYSERR;
3299 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
3302 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3304 free_neighbour (n, GNUNET_NO);
3305 return GNUNET_SYSERR;
3306 case GNUNET_TRANSPORT_PS_INIT_ATS:
3307 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
3308 GNUNET_STATISTICS_update (GST_stats,
3310 ("# unexpected CONNECT_ACK messages (not ready)"),
3313 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3314 if (ts.abs_value_us != n->primary_address.connect_timestamp.abs_value_us)
3316 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3317 "CONNECT_ACK ignored as the timestamp does not match our CONNECT request\n");
3320 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3321 GNUNET_STATISTICS_set (GST_stats,
3322 gettext_noop ("# peers connected"),
3323 ++neighbours_connected,
3325 connect_notify_cb (callback_cls, &n->id,
3326 n->primary_address.bandwidth_in,
3327 n->primary_address.bandwidth_out);
3328 /* Tell ATS that the outbound session we created to send CONNECT was successful */
3329 GST_ats_add_address (n->primary_address.address,
3330 n->primary_address.session,
3332 set_primary_address (n,
3333 n->primary_address.address,
3334 n->primary_address.session,
3335 n->primary_address.bandwidth_in,
3336 n->primary_address.bandwidth_out,
3338 send_session_ack_message (n);
3340 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
3341 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3342 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
3343 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3344 GNUNET_STATISTICS_update (GST_stats,
3346 ("# unexpected CONNECT_ACK messages (not ready)"),
3349 case GNUNET_TRANSPORT_PS_CONNECTED:
3350 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
3351 send_session_ack_message (n);
3353 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3354 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
3355 /* we didn't expect any CONNECT_ACK, as we are waiting for ATS
3356 to give us a new address... */
3357 GNUNET_STATISTICS_update (GST_stats,
3359 ("# unexpected CONNECT_ACK messages (waiting on ATS)"),
3362 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3363 /* new address worked; go back to connected! */
3364 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
3365 send_session_ack_message (n);
3367 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
3368 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
3369 send_session_ack_message (n);
3371 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3372 /* new address worked; adopt it and go back to connected! */
3373 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3374 GNUNET_break (GNUNET_NO == n->alternative_address.ats_active);
3376 GST_ats_add_address (n->alternative_address.address,
3377 n->alternative_address.session,
3379 set_primary_address (n, n->alternative_address.address,
3380 n->alternative_address.session, n->alternative_address.bandwidth_in,
3381 n->alternative_address.bandwidth_out, GNUNET_YES);
3383 free_address (&n->alternative_address);
3384 send_session_ack_message (n);
3386 case GNUNET_TRANSPORT_PS_DISCONNECT:
3387 GNUNET_STATISTICS_update (GST_stats,
3389 ("# unexpected CONNECT_ACK messages (disconnecting)"),
3391 return GNUNET_SYSERR;
3392 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3396 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3397 "Unhandled state `%s'\n",
3398 GNUNET_TRANSPORT_ps2s (n->state));
3400 return GNUNET_SYSERR;
3407 * A session was terminated. Take note; if needed, try to get
3408 * an alternative address from ATS.
3410 * @param peer identity of the peer where the session died
3411 * @param session session that is gone
3412 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
3413 * this session was not in use
3416 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
3417 struct Session *session)
3419 struct NeighbourMapEntry *n;
3420 struct BlackListCheckContext *bcc;
3421 struct BlackListCheckContext *bcc_next;
3423 /* make sure to cancel all ongoing blacklist checks involving 'session' */
3425 while (NULL != (bcc = bcc_next))
3427 bcc_next = bcc->next;
3428 if (bcc->na.session == session)
3430 if (NULL != bcc->bc)
3431 GST_blacklist_test_cancel (bcc->bc);
3432 GNUNET_HELLO_address_free (bcc->na.address);
3433 GNUNET_CONTAINER_DLL_remove (bc_head,
3439 if (NULL == (n = lookup_neighbour (peer)))
3440 return GNUNET_NO; /* can't affect us */
3441 if (session != n->primary_address.session)
3443 if (session == n->alternative_address.session)
3445 if ( (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
3446 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT == n->state) )
3447 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
3450 free_address (&n->alternative_address);
3452 return GNUNET_NO; /* doesn't affect us further */
3455 n->expect_latency_response = GNUNET_NO;
3456 /* The session for neighbour's primary address died */
3459 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3461 free_neighbour (n, GNUNET_NO);
3463 case GNUNET_TRANSPORT_PS_INIT_ATS:
3465 free_neighbour (n, GNUNET_NO);
3467 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
3468 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3469 /* The session used to send the CONNECT terminated:
3470 * this implies a connect error*/
3471 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3472 "Could not send CONNECT message with address `%s' session %p: session terminated, requesting new address\n",
3473 GST_plugins_a2s (n->primary_address.address), n->primary_address.session,
3475 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL);
3476 unset_primary_address (n);
3477 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
3478 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3480 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
3481 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3482 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
3483 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3484 /* error on inbound session; free neighbour entirely */
3485 free_address (&n->primary_address);
3486 free_neighbour (n, GNUNET_NO);
3488 case GNUNET_TRANSPORT_PS_CONNECTED:
3489 unset_primary_address (n);
3490 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3491 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3493 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3494 /* we don't have an address, how can it go down? */
3497 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
3498 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3499 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS, GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3501 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
3502 /* primary went down while we were checking secondary against
3503 blacklist, adopt secondary as primary */
3504 free_address (&n->primary_address);
3505 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3506 n->primary_address = n->alternative_address;
3507 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3509 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3510 /* primary went down while we were waiting for CONNECT_ACK on secondary;
3511 secondary as primary */
3512 free_address (&n->primary_address);
3513 n->primary_address = n->alternative_address;
3514 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3515 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT, GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3517 case GNUNET_TRANSPORT_PS_DISCONNECT:
3518 free_address (&n->primary_address);
3520 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3521 /* neighbour was freed and plugins told to terminate session */
3525 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3526 "Unhandled state `%s'\n",
3527 GNUNET_TRANSPORT_ps2s (n->state));
3531 if (GNUNET_SCHEDULER_NO_TASK != n->task)
3532 GNUNET_SCHEDULER_cancel (n->task);
3533 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
3539 * We received a 'SESSION_ACK' message from the other peer.
3540 * If we sent a 'CONNECT_ACK' last, this means we are now
3541 * connected. Otherwise, do nothing.
3543 * @param message possibly a 'struct SessionConnectMessage' (check format)
3544 * @param peer identity of the peer to switch the address for
3545 * @param address address of the other peer, NULL if other peer
3547 * @param session session to use (or NULL)
3548 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3551 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
3552 const struct GNUNET_PeerIdentity *peer,
3553 const struct GNUNET_HELLO_Address *address,
3554 struct Session *session)
3556 struct NeighbourMapEntry *n;
3558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3559 "Received SESSION_ACK message from peer `%s'\n",
3561 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
3563 GNUNET_break_op (0);
3564 return GNUNET_SYSERR;
3566 GNUNET_STATISTICS_update (GST_stats,
3568 ("# SESSION_ACK messages received"),
3570 if (NULL == (n = lookup_neighbour (peer)))
3572 GNUNET_break_op (0);
3573 return GNUNET_SYSERR;
3575 /* check if we are in a plausible state for having sent
3576 a CONNECT_ACK. If not, return, otherwise break */
3577 if ( ( (GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK != n->state) &&
3578 (GNUNET_TRANSPORT_PS_CONNECT_SENT != n->state) ) ||
3579 (2 != n->send_connect_ack) )
3581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3582 "Received SESSION_ACK message from peer `%s' in state %s/%d\n",
3584 GNUNET_TRANSPORT_ps2s (n->state),
3585 n->send_connect_ack);
3586 GNUNET_STATISTICS_update (GST_stats,
3587 gettext_noop ("# unexpected SESSION_ACK messages"), 1,
3591 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3592 GNUNET_STATISTICS_set (GST_stats,
3593 gettext_noop ("# peers connected"),
3594 ++neighbours_connected,
3596 connect_notify_cb (callback_cls, &n->id,
3597 n->primary_address.bandwidth_in,
3598 n->primary_address.bandwidth_out);
3600 GST_ats_add_address (n->primary_address.address,
3601 n->primary_address.session,
3603 set_primary_address (n,
3604 n->primary_address.address,
3605 n->primary_address.session,
3606 n->primary_address.bandwidth_in,
3607 n->primary_address.bandwidth_out,
3614 * Test if we're connected to the given peer.
3616 * @param target peer to test
3617 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
3620 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
3622 return test_connected (lookup_neighbour (target));
3626 * Change the incoming quota for the given peer.
3628 * @param neighbour identity of peer to change qutoa for
3629 * @param quota new quota
3632 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
3633 struct GNUNET_BANDWIDTH_Value32NBO quota)
3635 struct NeighbourMapEntry *n;
3637 if (NULL == (n = lookup_neighbour (neighbour)))
3639 GNUNET_STATISTICS_update (GST_stats,
3641 ("# SET QUOTA messages ignored (no such peer)"),
3645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3646 "Setting inbound quota of %u Bps for peer `%s' to all clients\n",
3647 ntohl (quota.value__), GNUNET_i2s (&n->id));
3648 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
3649 if (0 != ntohl (quota.value__))
3651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3652 "Disconnecting peer `%4s' due to SET_QUOTA\n",
3653 GNUNET_i2s (&n->id));
3654 if (GNUNET_YES == test_connected (n))
3655 GNUNET_STATISTICS_update (GST_stats,
3656 gettext_noop ("# disconnects due to quota of 0"),
3658 disconnect_neighbour (n);
3663 * We received a disconnect message from the given peer,
3664 * validate and process.
3666 * @param peer sender of the message
3667 * @param msg the disconnect message
3670 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
3671 const struct GNUNET_MessageHeader *msg)
3673 struct NeighbourMapEntry *n;
3674 const struct SessionDisconnectMessage *sdm;
3676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3677 "Received DISCONNECT message from peer `%s'\n",
3679 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
3681 // GNUNET_break_op (0);
3682 GNUNET_STATISTICS_update (GST_stats,
3684 ("# disconnect messages ignored (old format)"), 1,
3688 GNUNET_STATISTICS_update (GST_stats,
3690 ("# DISCONNECT messages received"),
3692 sdm = (const struct SessionDisconnectMessage *) msg;
3693 if (NULL == (n = lookup_neighbour (peer)))
3694 return; /* gone already */
3695 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value_us <= n->connect_ack_timestamp.abs_value_us)
3697 GNUNET_STATISTICS_update (GST_stats,
3699 ("# disconnect messages ignored (timestamp)"), 1,
3703 if (0 != memcmp (peer, &sdm->public_key, sizeof (struct GNUNET_PeerIdentity)))
3705 GNUNET_break_op (0);
3708 if (ntohl (sdm->purpose.size) !=
3709 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
3710 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
3711 sizeof (struct GNUNET_TIME_AbsoluteNBO))
3713 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3714 "%s message from peer `%s' has invalid size \n",
3717 GNUNET_break_op (0);
3721 GNUNET_CRYPTO_eddsa_verify
3722 (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
3723 &sdm->signature, &sdm->public_key))
3725 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3726 "%s message from peer `%s' cannot be verified \n",
3729 GNUNET_break_op (0);
3732 if (GNUNET_YES == test_connected (n))
3733 GNUNET_STATISTICS_update (GST_stats,
3735 ("# other peer asked to disconnect from us"), 1,
3737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3738 "Disconnecting by request from peer %s\n",
3740 disconnect_neighbour (n);
3745 * Closure for the neighbours_iterate function.
3747 struct IteratorContext
3750 * Function to call on each connected neighbour.
3752 GST_NeighbourIterator cb;
3762 * Call the callback from the closure for each neighbour.
3764 * @param cls the `struct IteratorContext`
3765 * @param key the hash of the public key of the neighbour
3766 * @param value the `struct NeighbourMapEntry`
3767 * @return #GNUNET_OK (continue to iterate)
3770 neighbours_iterate (void *cls,
3771 const struct GNUNET_PeerIdentity *key,
3774 struct IteratorContext *ic = cls;
3775 struct NeighbourMapEntry *n = value;
3776 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
3777 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
3780 if (NULL != n->primary_address.address)
3782 bandwidth_in = n->primary_address.bandwidth_in;
3783 bandwidth_out = n->primary_address.bandwidth_out;
3787 bandwidth_in = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3788 bandwidth_out = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3792 n->primary_address.address,
3795 bandwidth_in, bandwidth_out);
3801 * Iterate over all connected neighbours.
3803 * @param cb function to call
3804 * @param cb_cls closure for cb
3807 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
3809 struct IteratorContext ic;
3811 if (NULL == neighbours)
3812 return; /* can happen during shutdown */
3815 GNUNET_CONTAINER_multipeermap_iterate (neighbours, &neighbours_iterate, &ic);
3820 * If we have an active connection to the given target, it must be shutdown.
3822 * @param target peer to disconnect from
3825 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
3827 struct NeighbourMapEntry *n;
3829 if (NULL == (n = lookup_neighbour (target)))
3830 return; /* not active */
3831 if (GNUNET_YES == test_connected (n))
3832 GNUNET_STATISTICS_update (GST_stats,
3834 ("# disconnected from peer upon explicit request"), 1,
3836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3837 "Forced disconnect from peer %s\n",
3838 GNUNET_i2s (target));
3839 disconnect_neighbour (n);
3844 * Obtain current latency information for the given neighbour.
3846 * @param peer to get the latency for
3847 * @return observed latency of the address, FOREVER if the
3848 * the connection is not up
3850 struct GNUNET_TIME_Relative
3851 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
3853 struct NeighbourMapEntry *n;
3855 n = lookup_neighbour (peer);
3857 return GNUNET_TIME_UNIT_FOREVER_REL;
3860 case GNUNET_TRANSPORT_PS_CONNECTED:
3861 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3862 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_BLACKLIST:
3863 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3864 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3865 case GNUNET_TRANSPORT_PS_RECONNECT_BLACKLIST:
3867 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3868 case GNUNET_TRANSPORT_PS_INIT_BLACKLIST:
3869 case GNUNET_TRANSPORT_PS_INIT_ATS:
3870 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST_INBOUND:
3871 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3872 case GNUNET_TRANSPORT_PS_CONNECT_RECV_BLACKLIST:
3873 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3874 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3875 case GNUNET_TRANSPORT_PS_DISCONNECT:
3876 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3877 return GNUNET_TIME_UNIT_FOREVER_REL;
3879 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3880 "Unhandled state `%s'\n",
3881 GNUNET_TRANSPORT_ps2s (n->state));
3885 return GNUNET_TIME_UNIT_FOREVER_REL;
3890 * Obtain current address information for the given neighbour.
3893 * @return address currently used
3895 struct GNUNET_HELLO_Address *
3896 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer)
3898 struct NeighbourMapEntry *n;
3900 n = lookup_neighbour (peer);
3903 return n->primary_address.address;
3908 * Initialize the neighbours subsystem.
3910 * @param cls closure for callbacks
3911 * @param connect_cb function to call if we connect to a peer
3912 * @param disconnect_cb function to call if we disconnect from a peer
3913 * @param peer_address_cb function to call if we change an active address
3915 * @param max_fds maximum number of fds to use
3918 GST_neighbours_start (void *cls,
3919 NotifyConnect connect_cb,
3920 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
3921 GNUNET_TRANSPORT_NeighbourChangeCallback peer_address_cb,
3922 unsigned int max_fds)
3925 connect_notify_cb = connect_cb;
3926 disconnect_notify_cb = disconnect_cb;
3927 neighbour_change_cb = peer_address_cb;
3928 neighbours = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3929 registered_quota_notifications = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3930 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
3931 utilization_transmission, NULL);
3936 * Disconnect from the given neighbour.
3939 * @param key hash of neighbour's public key (not used)
3940 * @param value the 'struct NeighbourMapEntry' of the neighbour
3941 * @return #GNUNET_OK (continue to iterate)
3944 disconnect_all_neighbours (void *cls,
3945 const struct GNUNET_PeerIdentity *key,
3948 struct NeighbourMapEntry *n = value;
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3951 "Disconnecting peer `%4s', %s\n",
3952 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
3953 free_neighbour (n, GNUNET_NO);
3959 * Cleanup the neighbours subsystem.
3962 GST_neighbours_stop ()
3964 struct BlacklistCheckSwitchContext *cur;
3965 struct BlacklistCheckSwitchContext *next;
3967 if (NULL == neighbours)
3969 if (GNUNET_SCHEDULER_NO_TASK != util_transmission_tk)
3971 GNUNET_SCHEDULER_cancel (util_transmission_tk);
3972 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
3975 GNUNET_CONTAINER_multipeermap_iterate (neighbours,
3976 &disconnect_all_neighbours,
3978 GNUNET_CONTAINER_multipeermap_destroy (neighbours);
3980 next = pending_bc_head;
3981 for (cur = next; NULL != cur; cur = next )
3984 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, cur);
3986 if (NULL != cur->blc)
3988 GST_blacklist_test_cancel (cur->blc);
3991 if (NULL != cur->address)
3992 GNUNET_HELLO_address_free (cur->address);
3993 GNUNET_free_non_null (cur->ats);
3997 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
3998 &free_notification_cb, NULL);
3999 GNUNET_CONTAINER_multipeermap_destroy (registered_quota_notifications);
4000 registered_quota_notifications = NULL;
4003 callback_cls = NULL;
4004 connect_notify_cb = NULL;
4005 disconnect_notify_cb = NULL;
4006 neighbour_change_cb = NULL;
4010 /* end of file gnunet-service-transport_neighbours.c */