2 This file is part of GNUnet.
3 (C) 2010-2013 Christian Grothoff (and other contributing authors)
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22 * @file transport/gnunet-service-transport_neighbours.c
23 * @brief neighbour management
24 * @author Christian Grothoff
27 #include "gnunet_ats_service.h"
28 #include "gnunet-service-transport_neighbours.h"
29 #include "gnunet-service-transport_plugins.h"
30 #include "gnunet-service-transport_validation.h"
31 #include "gnunet-service-transport_clients.h"
32 #include "gnunet-service-transport.h"
33 #include "gnunet_peerinfo_service.h"
34 #include "gnunet-service-transport_blacklist.h"
35 #include "gnunet_constants.h"
36 #include "transport.h"
41 * Size of the neighbour hash map.
43 #define NEIGHBOUR_TABLE_SIZE 256
46 * Time we give plugin to transmit DISCONNECT message before the
47 * neighbour entry self-destructs.
49 #define DISCONNECT_SENT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
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)
88 * State describing which kind a reply this neighbour should send
93 * We did not receive a CONNECT message for this neighbour
97 /* The neighbour received a CONNECT message and has to send a CONNECT_ACK
99 ACK_SEND_CONNECT_ACK = 1,
101 /* The neighbour sent a CONNECT_ACK message and has to send a SESSION_ACK
103 ACK_SEND_SESSION_ACK = 2
107 GNUNET_NETWORK_STRUCT_BEGIN
110 * Message a peer sends to another to indicate that it intends to
111 * setup a connection/session for data exchange. A 'SESSION_CONNECT'
112 * should be answered with a 'SESSION_CONNECT_ACK' with the same body
113 * to confirm. A 'SESSION_CONNECT_ACK' should then be followed with
114 * a 'SESSION_ACK'. Once the 'SESSION_ACK' is received, both peers
115 * should be connected.
117 struct SessionConnectMessage
120 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT
121 * or #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK
123 struct GNUNET_MessageHeader header;
128 uint32_t reserved GNUNET_PACKED;
131 * Absolute time at the sender. Only the most recent connect
132 * message implies which session is preferred by the sender.
134 struct GNUNET_TIME_AbsoluteNBO timestamp;
140 * Message a peer sends to another when connected to indicate that a
141 * session is in use and the peer is still alive or to respond to a keep alive.
142 * A peer sends a message with type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE
143 * to request a message with #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
144 * When the keep alive response with type is received, transport service
145 * will call the respective plugin to update the session timeout
147 struct SessionKeepAliveMessage
150 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE or
151 * #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
153 struct GNUNET_MessageHeader header;
156 * A nonce to identify the session the keep alive is used for
158 uint32_t nonce GNUNET_PACKED;
162 * Message we send to the other peer to notify him that we intentionally
163 * are disconnecting (to reduce timeouts). This is just a friendly
164 * notification, peers must not rely on always receiving disconnect
167 struct SessionDisconnectMessage
170 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT
172 struct GNUNET_MessageHeader header;
177 uint32_t reserved GNUNET_PACKED;
180 * Purpose of the signature. Extends over the timestamp.
181 * Purpose should be #GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
183 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
186 * Absolute time at the sender. Only the most recent connect
187 * message implies which session is preferred by the sender.
189 struct GNUNET_TIME_AbsoluteNBO timestamp;
192 * Public key of the sender.
194 struct GNUNET_CRYPTO_EddsaPublicKey public_key;
197 * Signature of the peer that sends us the disconnect. Only
198 * valid if the timestamp is AFTER the timestamp from the
199 * corresponding 'CONNECT' message.
201 struct GNUNET_CRYPTO_EddsaSignature signature;
205 GNUNET_NETWORK_STRUCT_END
209 * For each neighbour we keep a list of messages
210 * that we still want to transmit to the neighbour.
216 * This is a doubly linked list.
218 struct MessageQueue *next;
221 * This is a doubly linked list.
223 struct MessageQueue *prev;
226 * Function to call once we're done.
228 GST_NeighbourSendContinuation cont;
231 * Closure for @e cont
236 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
237 * stuck together in memory. Allocated at the end of this struct.
239 const char *message_buf;
242 * Size of the message buf
244 size_t message_buf_size;
247 * At what time should we fail?
249 struct GNUNET_TIME_Absolute timeout;
257 * A possible address we could use to communicate with a neighbour.
259 struct NeighbourAddress
263 * Active session for this address.
265 struct Session *session;
268 * Network-level address information.
270 struct GNUNET_HELLO_Address *address;
273 * Timestamp of the 'SESSION_CONNECT' message we sent to the other
274 * peer for this address. Use to check that the ACK is in response
275 * to our most recent 'CONNECT'.
277 struct GNUNET_TIME_Absolute connect_timestamp;
280 * Inbound bandwidth from ATS for this address.
282 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
285 * Outbound bandwidth from ATS for this address.
287 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
290 * Did we tell ATS that this is our 'active' address?
295 * The current nonce sent in the last keep alive messages
297 uint32_t keep_alive_nonce;
301 * Entry in neighbours.
303 struct NeighbourMapEntry
307 * Head of list of messages we would like to send to this peer;
308 * must contain at most one message per client.
310 struct MessageQueue *messages_head;
313 * Tail of list of messages we would like to send to this peer; must
314 * contain at most one message per client.
316 struct MessageQueue *messages_tail;
319 * Are we currently trying to send a message? If so, which one?
321 struct MessageQueue *is_active;
324 * Primary address we currently use to communicate with the neighbour.
326 struct NeighbourAddress primary_address;
329 * Alternative address currently under consideration for communicating
330 * with the neighbour.
332 struct NeighbourAddress alternative_address;
335 * Identity of this neighbour.
337 struct GNUNET_PeerIdentity id;
340 * Main task that drives this peer (timeouts, keepalives, etc.).
341 * Always runs the 'master_task'.
343 GNUNET_SCHEDULER_TaskIdentifier task;
346 * Task to disconnect neighbour after we received a DISCONNECT message
348 GNUNET_SCHEDULER_TaskIdentifier delayed_disconnect_task;
351 * At what time should we sent the next keep-alive message?
353 struct GNUNET_TIME_Absolute keep_alive_time;
356 * At what time did we sent the last keep-alive message? Used
357 * to calculate round-trip time ("latency").
359 struct GNUNET_TIME_Absolute last_keep_alive_time;
362 * Timestamp we should include in our next CONNECT_ACK message.
363 * (only valid if 'send_connect_ack' is #GNUNET_YES). Used to build
364 * our CONNECT_ACK message.
366 struct GNUNET_TIME_Absolute connect_ack_timestamp;
369 * ATS address suggest handle
371 struct GNUNET_ATS_SuggestHandle *suggest_handle;
374 * Time where we should cut the connection (timeout) if we don't
375 * make progress in the state machine (or get a KEEPALIVE_RESPONSE
376 * if we are in S_CONNECTED).
378 struct GNUNET_TIME_Absolute timeout;
381 * Latest calculated latency value
383 struct GNUNET_TIME_Relative latency;
386 * Tracker for inbound bandwidth.
388 struct GNUNET_BANDWIDTH_Tracker in_tracker;
391 * How often has the other peer (recently) violated the inbound
392 * traffic limit? Incremented by 10 per violation, decremented by 1
393 * per non-violation (for each time interval).
395 unsigned int quota_violation_count;
398 * The current state of the peer.
400 enum GNUNET_TRANSPORT_PeerState state;
403 * Did we sent an KEEP_ALIVE message and are we expecting a response?
405 int expect_latency_response;
408 * When a peer wants to connect we have to reply to the 1st CONNECT message
409 * with a CONNECT_ACK message. But sometime we cannot send this message
410 * immediately since we do not have an address and then we have to remember
411 * to send this message as soon as we have an address.
413 * Flag to set if we still need to send a CONNECT_ACK message to the other peer
414 * (once we have an address to use and the peer has been allowed by our
415 * blacklist). Initially set to #ACK_UNDEFINED. Set to #ACK_SEND_CONNECT_ACK
416 * if we need to send a CONNECT_ACK. Set to #ACK_SEND_SESSION_ACK if we did
417 * send a CONNECT_ACK and should go to 'S_CONNECTED' upon receiving a
418 * 'SESSION_ACK' (regardless of what our own state machine might say).
420 enum GST_ACK_State ack_state;
423 * Tracking utilization of outbound bandwidth
425 uint32_t util_payload_bytes_sent;
428 * Tracking utilization of inbound bandwidth
430 uint32_t util_payload_bytes_recv;
433 * Tracking utilization of outbound bandwidth
435 uint32_t util_total_bytes_sent;
438 * Tracking utilization of inbound bandwidth
440 uint32_t util_total_bytes_recv;
443 * Date of last utilization transmission
445 struct GNUNET_TIME_Absolute last_util_transmission;
450 * Context for blacklist checks and the #try_connect_bl_check_cont()
451 * function. Stores information about ongoing blacklist checks.
453 struct BlackListCheckContext
457 * We keep blacklist checks in a DLL.
459 struct BlackListCheckContext *next;
462 * We keep blacklist checks in a DLL.
464 struct BlackListCheckContext *prev;
467 * Address that is being checked.
469 struct NeighbourAddress na;
472 * Handle to the ongoing blacklist check.
474 struct GST_BlacklistCheck *bc;
479 * Hash map from peer identities to the respective 'struct NeighbourMapEntry'.
481 static struct GNUNET_CONTAINER_MultiPeerMap *neighbours;
484 * We keep blacklist checks in a DLL so that we can find
485 * the 'sessions' in their 'struct NeighbourAddress' if
486 * a session goes down.
488 static struct BlackListCheckContext *bc_head;
491 * We keep blacklist checks in a DLL.
493 static struct BlackListCheckContext *bc_tail;
496 * List of pending blacklist checks: head
498 static struct BlacklistCheckSwitchContext *pending_bc_head;
501 * List of pending blacklist checks: tail
503 static struct BlacklistCheckSwitchContext *pending_bc_tail;
506 * Closure for #connect_notify_cb, #disconnect_notify_cb and #neighbour_change_cb
508 static void *callback_cls;
511 * Function to call when we connected to a neighbour.
513 static NotifyConnect connect_notify_cb;
516 * Function to call when we disconnected from a neighbour.
518 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
521 * Function to call when a neighbour changed address, state or bandwidth.
523 static GNUNET_TRANSPORT_NeighbourChangeCallback neighbour_change_cb;
526 * counter for connected neighbours
528 static unsigned int neighbours_connected;
531 * Number of bytes we have currently queued for transmission.
533 static unsigned long long bytes_in_send_queue;
536 * Task transmitting utilization data
538 static GNUNET_SCHEDULER_TaskIdentifier util_transmission_tk;
541 static struct GNUNET_CONTAINER_MultiPeerMap *registered_quota_notifications;
544 print_ack_state (enum GST_ACK_State s)
549 case ACK_SEND_CONNECT_ACK:
550 return "SEND_CONNECT_ACK";
551 case ACK_SEND_SESSION_ACK:
552 return "SEND_SESSION_ACK";
560 * Lookup a neighbour entry in the neighbours hash map.
562 * @param pid identity of the peer to look up
563 * @return the entry, NULL if there is no existing record
565 static struct NeighbourMapEntry *
566 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
568 if (NULL == neighbours)
570 return GNUNET_CONTAINER_multipeermap_get (neighbours, pid);
575 * Test if we're connected to the given peer.
577 * @param n neighbour entry of peer to test
578 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
581 test_connected (struct NeighbourMapEntry *n)
585 return GNUNET_TRANSPORT_is_connected (n->state);
589 * Send information about a new outbound quota to our clients.
591 * @param target affected peer
592 * @param quota new quota
595 send_outbound_quota (const struct GNUNET_PeerIdentity *target,
596 struct GNUNET_BANDWIDTH_Value32NBO quota)
598 struct QuotaSetMessage q_msg;
600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
601 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
602 ntohl (quota.value__), GNUNET_i2s (target));
603 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
604 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
606 q_msg.peer = (*target);
607 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
612 * We don't need a given neighbour address any more.
613 * Release its resources and give appropriate notifications
614 * to ATS and other subsystems.
616 * @param na address we are done with; @a na itself must NOT be 'free'd, only the contents!
619 free_address (struct NeighbourAddress *na)
621 if (GNUNET_YES == na->ats_active)
623 GST_validation_set_address_use (na->address, na->session, GNUNET_NO);
624 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_NO);
627 na->bandwidth_in = GNUNET_BANDWIDTH_value_init (0);
628 na->bandwidth_out = GNUNET_BANDWIDTH_value_init (0);
629 na->ats_active = GNUNET_NO;
630 na->keep_alive_nonce = 0;
631 if (NULL != na->address)
633 GNUNET_HELLO_address_free (na->address);
641 * Set net state for this neighbour and notify monitoring
643 * @param n the respective neighbour
644 * @param s the new state
647 set_state (struct NeighbourMapEntry *n, enum GNUNET_TRANSPORT_PeerState s)
650 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s\n",
652 GNUNET_TRANSPORT_ps2s(s));
653 neighbour_change_cb (callback_cls,
655 n->primary_address.address,
656 n->state, n->timeout,
657 n->primary_address.bandwidth_in,
658 n->primary_address.bandwidth_out);
663 * Set net state and state timeout for this neighbour and notify monitoring
665 * @param n the respective neighbour
666 * @param s the new state
667 * @param timeout the new timeout
670 set_state_and_timeout (struct NeighbourMapEntry *n,
671 enum GNUNET_TRANSPORT_PeerState s,
672 struct GNUNET_TIME_Absolute timeout)
675 n->timeout = timeout;
676 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s with timeout %s\n",
678 GNUNET_TRANSPORT_ps2s(s),
679 GNUNET_STRINGS_absolute_time_to_string (timeout));
680 neighbour_change_cb (callback_cls,
682 n->primary_address.address,
683 n->state, n->timeout,
684 n->primary_address.bandwidth_in,
685 n->primary_address.bandwidth_out);
690 * Set new state timeout for this neighbour and notify monitoring
692 * @param n the respective neighbour
693 * @param timeout the new timeout
696 set_timeout (struct NeighbourMapEntry *n,
697 struct GNUNET_TIME_Absolute timeout)
699 n->timeout = timeout;
700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Neighbour `%s' changed timeout %s\n",
702 GNUNET_STRINGS_absolute_time_to_string (timeout));
703 neighbour_change_cb (callback_cls,
705 n->primary_address.address,
706 n->state, n->timeout,
707 n->primary_address.bandwidth_in,
708 n->primary_address.bandwidth_out);
713 * Initialize the alternative address of a neighbour
715 * @param n the neighbour
716 * @param address address of the other peer, NULL if other peer
718 * @param session session to use (or NULL, in which case an
719 * address must be setup)
720 * @param bandwidth_in inbound quota to be used when connection is up
721 * @param bandwidth_out outbound quota to be used when connection is up
724 set_alternative_address (struct NeighbourMapEntry *n,
725 const struct GNUNET_HELLO_Address *address,
726 struct Session *session,
727 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
728 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
730 struct GNUNET_TRANSPORT_PluginFunctions *papi;
731 if (NULL == (papi = GST_plugins_find (address->transport_name)))
736 if (session == n->alternative_address.session)
738 n->alternative_address.bandwidth_in = bandwidth_in;
739 n->alternative_address.bandwidth_out = bandwidth_out;
742 free_address (&n->alternative_address);
744 session = papi->get_session (papi->cls, address);
747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
748 "Failed to obtain new session for peer `%s' and address '%s'\n",
749 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
750 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
754 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' configured alternative address %s\n",
756 GST_plugins_a2s(address));
758 n->alternative_address.address = GNUNET_HELLO_address_copy (address);
759 n->alternative_address.bandwidth_in = bandwidth_in;
760 n->alternative_address.bandwidth_out = bandwidth_out;
761 n->alternative_address.session = session;
762 n->alternative_address.ats_active = GNUNET_NO;
763 n->alternative_address.keep_alive_nonce = 0;
768 * Initialize the primary address of a neighbour
770 * @param n the neighbour
771 * @param address address of the other peer, NULL if other peer
773 * @param session session to use (or NULL, in which case an
774 * address must be setup)
775 * @param bandwidth_in inbound quota to be used when connection is up
776 * @param bandwidth_out outbound quota to be used when connection is up
777 * @param is_active #GNUNET_YES to mark this as the active address with ATS
780 set_primary_address (struct NeighbourMapEntry *n,
781 const struct GNUNET_HELLO_Address *address,
782 struct Session *session,
783 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
784 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
787 struct GNUNET_TRANSPORT_PluginFunctions *papi;
789 if (NULL == (papi = GST_plugins_find (address->transport_name)))
794 if (session == n->primary_address.session)
796 n->primary_address.bandwidth_in = bandwidth_in;
797 n->primary_address.bandwidth_out = bandwidth_out;
798 if (is_active != n->primary_address.ats_active)
800 n->primary_address.ats_active = is_active;
801 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, is_active);
802 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, is_active);
804 if (GNUNET_YES == is_active)
806 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
807 send_outbound_quota (&address->peer, bandwidth_out);
811 free_address (&n->primary_address);
813 session = papi->get_session (papi->cls, address);
816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
817 "Failed to obtain new session for peer `%s' and address '%s'\n",
818 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
819 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
823 n->primary_address.address = GNUNET_HELLO_address_copy (address);
824 n->primary_address.bandwidth_in = bandwidth_in;
825 n->primary_address.bandwidth_out = bandwidth_out;
826 n->primary_address.session = session;
827 n->primary_address.ats_active = is_active;
828 n->primary_address.keep_alive_nonce = 0;
829 if (GNUNET_YES == is_active)
831 /* Telling ATS about new session */
832 GNUNET_ATS_address_in_use (GST_ats, n->primary_address.address, n->primary_address.session, GNUNET_YES);
833 GST_validation_set_address_use (n->primary_address.address, n->primary_address.session, GNUNET_YES);
834 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
835 send_outbound_quota (&address->peer, bandwidth_out);
838 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' switched to address `%s'\n",
840 GST_plugins_a2s(address));
842 neighbour_change_cb (callback_cls,
844 n->primary_address.address,
845 n->state, n->timeout,
846 n->primary_address.bandwidth_in,
847 n->primary_address.bandwidth_out);
851 * Clear the primary address of a neighbour since this address is not
852 * valid anymore and notify monitoring about it
854 * @param n the neighbour
857 unset_primary_address (struct NeighbourMapEntry *n)
859 /* Unset primary address */
860 free_address (&n->primary_address);
862 /* Notify monitoring about it */
863 neighbour_change_cb (callback_cls,
866 n->state, n->timeout,
867 n->primary_address.bandwidth_in,
868 n->primary_address.bandwidth_out);
872 * Clear the alternative address of a neighbour since this address is not
875 * @param n the neighbour
878 unset_alternative_address (struct NeighbourMapEntry *n)
880 /* Unset primary address */
881 free_address (&n->alternative_address);
885 * Free a neighbour map entry.
887 * @param n entry to free
888 * @param keep_sessions #GNUNET_NO to tell plugin to terminate sessions,
889 * #GNUNET_YES to keep all sessions
892 free_neighbour (struct NeighbourMapEntry *n,
895 struct MessageQueue *mq;
896 struct GNUNET_TRANSPORT_PluginFunctions *papi;
897 struct GNUNET_HELLO_Address *backup_primary;
899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
900 "Freeing neighbour state of peer `%s'\n",
901 GNUNET_i2s (&n->id));
902 n->is_active = NULL; /* always free'd by its own continuation! */
904 /* fail messages currently in the queue */
905 while (NULL != (mq = n->messages_head))
907 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
908 if (NULL != mq->cont)
909 mq->cont (mq->cont_cls, GNUNET_SYSERR, mq->message_buf_size, 0);
912 /* It is too late to send other peer disconnect notifications, but at
913 least internally we need to get clean... */
914 if (GNUNET_YES == test_connected (n))
916 GNUNET_STATISTICS_set (GST_stats,
917 gettext_noop ("# peers connected"),
918 --neighbours_connected,
920 disconnect_notify_cb (callback_cls, &n->id);
923 /* Mark peer as disconnected */
924 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED);
926 if (NULL != n->primary_address.address)
927 backup_primary = GNUNET_HELLO_address_copy (n->primary_address.address);
929 backup_primary = NULL;
931 /* free addresses and mark as unused */
932 unset_primary_address (n);
933 free_address (&n->alternative_address);
935 /* cut all transport-level connection for this peer */
936 if ((GNUNET_NO == keep_sessions) &&
937 (NULL != backup_primary) &&
938 (NULL != (papi = GST_plugins_find (backup_primary->transport_name))))
939 papi->disconnect_peer (papi->cls, &n->id);
941 if (NULL != backup_primary)
942 GNUNET_HELLO_address_free (backup_primary);
943 GNUNET_assert (GNUNET_YES ==
944 GNUNET_CONTAINER_multipeermap_remove (neighbours,
947 /* Cancel address requests for this peer */
948 if (NULL != n->suggest_handle)
950 GNUNET_ATS_suggest_address_cancel (GST_ats, &n->id);
951 n->suggest_handle = NULL;
954 /* Cancel the disconnect task */
955 if (GNUNET_SCHEDULER_NO_TASK != n->delayed_disconnect_task)
957 GNUNET_SCHEDULER_cancel (n->delayed_disconnect_task);
958 n->delayed_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
961 /* Cancel the master task */
962 if (GNUNET_SCHEDULER_NO_TASK != n->task)
964 GNUNET_SCHEDULER_cancel (n->task);
965 n->task = GNUNET_SCHEDULER_NO_TASK;
967 /* free rest of memory */
973 * Transmit a message using the current session of the given
976 * @param n entry for the recipient
977 * @param msgbuf buffer to transmit
978 * @param msgbuf_size number of bytes in @a msgbuf buffer
979 * @param priority transmission priority
980 * @param timeout transmission timeout
981 * @param use_keepalive_timeout #GNUNET_YES to use plugin-specific keep-alive
982 * timeout (@a timeout is ignored in that case), #GNUNET_NO otherwise
983 * @param cont continuation to call when finished (can be NULL)
984 * @param cont_cls closure for @a cont
985 * @return timeout (copy of @a timeout or a calculated one if
986 * @a use_keepalive_timeout is #GNUNET_YES.
988 static struct GNUNET_TIME_Relative
989 send_with_session (struct NeighbourMapEntry *n,
990 const char *msgbuf, size_t msgbuf_size,
992 struct GNUNET_TIME_Relative timeout,
993 unsigned int use_keepalive_timeout,
994 GNUNET_TRANSPORT_TransmitContinuation cont,
997 struct GNUNET_TRANSPORT_PluginFunctions *papi;
998 struct GNUNET_TIME_Relative result = GNUNET_TIME_UNIT_FOREVER_REL;
1000 GNUNET_assert (n->primary_address.session != NULL);
1001 if ( ((NULL == (papi = GST_plugins_find (n->primary_address.address->transport_name)) ||
1002 (-1 == papi->send (papi->cls,
1003 n->primary_address.session,
1004 msgbuf, msgbuf_size,
1006 (result = (GNUNET_NO == use_keepalive_timeout) ? timeout :
1007 GNUNET_TIME_relative_divide (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1008 papi->query_keepalive_factor (papi->cls))),
1009 cont, cont_cls)))) &&
1011 cont (cont_cls, &n->id, GNUNET_SYSERR, msgbuf_size, 0);
1012 GST_neighbours_notify_data_sent (&n->id,
1013 n->primary_address.address, n->primary_address.session, msgbuf_size);
1014 GNUNET_break (NULL != papi);
1020 * Master task run for every neighbour. Performs all of the time-related
1021 * activities (keep alive, send next message, disconnect if idle, finish
1022 * clean up after disconnect).
1024 * @param cls the `struct NeighbourMapEntry` for which we are running
1025 * @param tc scheduler context (unused)
1028 master_task (void *cls,
1029 const struct GNUNET_SCHEDULER_TaskContext *tc);
1033 * Function called when the 'DISCONNECT' message has been sent by the
1034 * plugin. Frees the neighbour --- if the entry still exists.
1037 * @param target identity of the neighbour that was disconnected
1038 * @param result #GNUNET_OK if the disconnect got out successfully
1039 * @param payload bytes payload
1040 * @param physical bytes physical
1043 send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
1044 int result, size_t payload, size_t physical)
1046 struct NeighbourMapEntry *n;
1048 n = lookup_neighbour (target);
1050 return; /* already gone */
1051 if (GNUNET_TRANSPORT_PS_DISCONNECT != n->state)
1052 return; /* have created a fresh entry since */
1053 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1054 GNUNET_SCHEDULER_cancel (n->task);
1055 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1060 * Transmit a DISCONNECT message to the other peer.
1062 * @param n neighbour to send DISCONNECT message.
1065 send_disconnect (struct NeighbourMapEntry *n)
1067 struct SessionDisconnectMessage disconnect_msg;
1069 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1070 "Sending DISCONNECT message to peer `%4s'\n",
1071 GNUNET_i2s (&n->id));
1072 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
1073 disconnect_msg.header.type =
1074 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1075 disconnect_msg.reserved = htonl (0);
1076 disconnect_msg.purpose.size =
1077 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
1078 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
1079 sizeof (struct GNUNET_TIME_AbsoluteNBO));
1080 disconnect_msg.purpose.purpose =
1081 htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1082 disconnect_msg.timestamp =
1083 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1084 disconnect_msg.public_key = GST_my_identity.public_key;
1085 GNUNET_assert (GNUNET_OK ==
1086 GNUNET_CRYPTO_eddsa_sign (GST_my_private_key,
1087 &disconnect_msg.purpose,
1088 &disconnect_msg.signature));
1090 (void) send_with_session (n, (const char *) &disconnect_msg,
1091 sizeof (disconnect_msg), UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1092 GNUNET_NO, &send_disconnect_cont, NULL );
1093 GNUNET_STATISTICS_update (GST_stats,
1095 ("# DISCONNECT messages sent"), 1,
1101 * Disconnect from the given neighbour, clean up the record.
1103 * @param n neighbour to disconnect from
1106 disconnect_neighbour (struct NeighbourMapEntry *n)
1108 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1109 "Disconnecting from peer %s in state %s\n",
1110 GNUNET_i2s (&n->id),
1111 GNUNET_TRANSPORT_ps2s (n->state));
1112 /* depending on state, notify neighbour and/or upper layers of this peer
1116 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
1117 case GNUNET_TRANSPORT_PS_INIT_ATS:
1118 /* other peer is completely unaware of us, no need to send DISCONNECT */
1119 free_neighbour (n, GNUNET_NO);
1121 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
1122 send_disconnect (n);
1123 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1125 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
1126 /* we never ACK'ed the other peer's request, no need to send DISCONNECT */
1127 free_neighbour (n, GNUNET_NO);
1129 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
1130 /* we DID ACK the other peer's request, must send DISCONNECT */
1131 send_disconnect (n);
1132 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1134 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
1135 case GNUNET_TRANSPORT_PS_CONNECTED:
1136 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1137 /* we are currently connected, need to send disconnect and do
1138 internal notifications and update statistics */
1139 send_disconnect (n);
1140 GNUNET_STATISTICS_set (GST_stats,
1141 gettext_noop ("# peers connected"),
1142 --neighbours_connected,
1144 disconnect_notify_cb (callback_cls, &n->id);
1145 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1147 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
1148 /* Disconnecting while waiting for an ATS address to reconnect,
1149 * cannot send DISCONNECT */
1150 free_neighbour (n, GNUNET_NO);
1152 case GNUNET_TRANSPORT_PS_DISCONNECT:
1153 /* already disconnected, ignore */
1155 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
1156 /* already cleaned up, how did we get here!? */
1160 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1161 "Unhandled state `%s'\n",
1162 GNUNET_TRANSPORT_ps2s (n->state));
1166 /* schedule timeout to clean up */
1167 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1168 GNUNET_SCHEDULER_cancel (n->task);
1169 n->task = GNUNET_SCHEDULER_add_delayed (DISCONNECT_SENT_TIMEOUT,
1175 * We're done with our transmission attempt, continue processing.
1177 * @param cls the `struct MessageQueue` of the message
1178 * @param receiver intended receiver
1179 * @param success whether it worked or not
1180 * @param size_payload bytes payload sent
1181 * @param physical bytes sent on wire
1184 transmit_send_continuation (void *cls,
1185 const struct GNUNET_PeerIdentity *receiver,
1186 int success, size_t size_payload, size_t physical)
1188 struct MessageQueue *mq = cls;
1189 struct NeighbourMapEntry *n;
1191 if (NULL == (n = lookup_neighbour (receiver)))
1194 return; /* disconnect or other error while transmitting, can happen */
1196 if (n->is_active == mq)
1198 /* this is still "our" neighbour, remove us from its queue
1199 and allow it to send the next message now */
1200 n->is_active = NULL;
1201 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1202 GNUNET_SCHEDULER_cancel (n->task);
1203 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1205 if (bytes_in_send_queue < mq->message_buf_size)
1207 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1208 "Bytes_in_send_queue `%u', Message_size %u, result: %s, payload %u, on wire %u\n",
1209 bytes_in_send_queue, mq->message_buf_size,
1210 (GNUNET_OK == success) ? "OK" : "FAIL",
1211 size_payload, physical);
1216 GNUNET_break (size_payload == mq->message_buf_size);
1217 bytes_in_send_queue -= mq->message_buf_size;
1218 GNUNET_STATISTICS_set (GST_stats,
1220 ("# bytes in message queue for other peers"),
1221 bytes_in_send_queue, GNUNET_NO);
1222 if (GNUNET_OK == success)
1223 GNUNET_STATISTICS_update (GST_stats,
1225 ("# messages transmitted to other peers"),
1228 GNUNET_STATISTICS_update (GST_stats,
1230 ("# transmission failures for messages to other peers"),
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1233 "Sending message to `%s' of type %u with %u bytes was a %s\n",
1234 GNUNET_i2s (receiver),
1235 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
1236 mq->message_buf_size,
1237 (success == GNUNET_OK) ? "success" : "FAILURE");
1238 if (NULL != mq->cont)
1239 mq->cont (mq->cont_cls, success, size_payload, physical);
1245 * Check the message list for the given neighbour and if we can
1246 * send a message, do so. This function should only be called
1247 * if the connection is at least generally ready for transmission.
1248 * While we will only send one message at a time, no bandwidth
1249 * quota management is performed here. If a message was given to
1250 * the plugin, the continuation will automatically re-schedule
1251 * the 'master' task once the next message might be transmitted.
1253 * @param n target peer for which to transmit
1256 try_transmission_to_peer (struct NeighbourMapEntry *n)
1258 struct MessageQueue *mq;
1259 struct GNUNET_TIME_Relative timeout;
1261 if (NULL == n->primary_address.address)
1263 /* no address, why are we here? */
1267 if ((0 == n->primary_address.address->address_length) &&
1268 (NULL == n->primary_address.session))
1270 /* no address, why are we here? */
1274 if (NULL != n->is_active)
1276 /* transmission already pending */
1280 /* timeout messages from the queue that are past their due date */
1281 while (NULL != (mq = n->messages_head))
1283 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1284 if (timeout.rel_value_us > 0)
1286 GNUNET_STATISTICS_update (GST_stats,
1288 ("# messages timed out while in transport queue"),
1290 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1292 transmit_send_continuation (mq, &n->id,
1294 mq->message_buf_size, 0); /* timeout */
1297 return; /* no more messages */
1298 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1302 "Giving message with %u bytes to plugin session %p\n",
1303 mq->message_buf_size, n->primary_address.session);
1305 (void) send_with_session (n,
1306 mq->message_buf, mq->message_buf_size,
1307 0 /* priority */, timeout, GNUNET_NO,
1308 &transmit_send_continuation, mq);
1313 * Send keepalive message to the neighbour. Must only be called
1314 * if we are on 'connected' state or while trying to switch addresses.
1315 * Will internally determine if a keepalive is truly needed (so can
1316 * always be called).
1318 * @param n neighbour that went idle and needs a keepalive
1321 send_keepalive (struct NeighbourMapEntry *n)
1323 struct SessionKeepAliveMessage m;
1324 struct GNUNET_TIME_Relative timeout;
1327 GNUNET_assert ((GNUNET_TRANSPORT_PS_CONNECTED == n->state) ||
1328 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT));
1329 if (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time).rel_value_us > 0)
1330 return; /* no keepalive needed at this time */
1332 nonce = 0; /* 0 indicates 'not set' */
1334 nonce = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
1336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1337 "Sending keep alive to peer `%s' with nonce %u\n",
1338 GNUNET_i2s (&n->id), nonce);
1340 m.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1341 m.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
1342 m.nonce = htonl (nonce);
1344 timeout = send_with_session (n,
1345 (const void *) &m, sizeof (m),
1346 UINT32_MAX /* priority */,
1347 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1349 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
1351 n->primary_address.keep_alive_nonce = nonce;
1352 n->expect_latency_response = GNUNET_YES;
1353 n->last_keep_alive_time = GNUNET_TIME_absolute_get ();
1354 n->keep_alive_time = GNUNET_TIME_relative_to_absolute (timeout);
1360 * Keep the connection to the given neighbour alive longer,
1361 * we received a KEEPALIVE (or equivalent); send a response.
1363 * @param neighbour neighbour to keep alive (by sending keep alive response)
1364 * @param m the keep alive message containing the nonce to respond to
1367 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
1368 const struct GNUNET_MessageHeader *m)
1370 struct NeighbourMapEntry *n;
1371 const struct SessionKeepAliveMessage *msg_in;
1372 struct SessionKeepAliveMessage msg;
1374 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1377 msg_in = (struct SessionKeepAliveMessage *) m;
1378 if (NULL == (n = lookup_neighbour (neighbour)))
1380 GNUNET_STATISTICS_update (GST_stats,
1382 ("# KEEPALIVE messages discarded (peer unknown)"),
1386 if (NULL == n->primary_address.session)
1388 GNUNET_STATISTICS_update (GST_stats,
1390 ("# KEEPALIVE messages discarded (no session)"),
1395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1396 "Received keep alive request from peer `%s' with nonce %u\n",
1397 GNUNET_i2s (&n->id), ntohl (msg_in->nonce));
1399 /* send reply to allow neighbour to measure latency */
1400 msg.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1401 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE);
1402 msg.nonce = msg_in->nonce;
1403 (void) send_with_session(n,
1404 (const void *) &msg, sizeof (struct SessionKeepAliveMessage),
1405 UINT32_MAX /* priority */,
1406 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1412 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
1413 * latency to this peer. Pass the updated information (existing ats
1414 * plus calculated latency) to ATS.
1416 * @param neighbour neighbour to keep alive
1417 * @param m the message containing the keep alive response
1420 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
1421 const struct GNUNET_MessageHeader *m)
1423 struct NeighbourMapEntry *n;
1424 const struct SessionKeepAliveMessage *msg;
1425 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1427 struct GNUNET_ATS_Information ats;
1429 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1432 msg = (const struct SessionKeepAliveMessage *) m;
1433 if (NULL == (n = lookup_neighbour (neighbour)))
1435 GNUNET_STATISTICS_update (GST_stats,
1437 ("# KEEPALIVE_RESPONSE messages discarded (not connected)"),
1441 if ( (GNUNET_TRANSPORT_PS_CONNECTED != n->state) ||
1442 (GNUNET_YES != n->expect_latency_response) )
1444 GNUNET_STATISTICS_update (GST_stats,
1446 ("# KEEPALIVE_RESPONSE messages discarded (not expected)"),
1450 if (NULL == n->primary_address.address)
1452 GNUNET_STATISTICS_update (GST_stats,
1454 ("# KEEPALIVE_RESPONSE messages discarded (address changed)"),
1458 if (n->primary_address.keep_alive_nonce != ntohl (msg->nonce))
1460 GNUNET_STATISTICS_update (GST_stats,
1462 ("# KEEPALIVE_RESPONSE messages discarded (wrong nonce)"),
1468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1469 "Received keep alive response from peer `%s' for session %p\n",
1470 GNUNET_i2s (&n->id), n->primary_address.session);
1474 /* Update session timeout here */
1475 if (NULL != (papi = GST_plugins_find (n->primary_address.address->transport_name)))
1477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1478 "Updating session for peer `%s' for session %p\n",
1479 GNUNET_i2s (&n->id), n->primary_address.session);
1480 papi->update_session_timeout (papi->cls, &n->id, n->primary_address.session);
1487 n->primary_address.keep_alive_nonce = 0;
1488 n->expect_latency_response = GNUNET_NO;
1489 n->latency = GNUNET_TIME_absolute_get_duration (n->last_keep_alive_time);
1490 set_timeout (n, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
1492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1493 "Latency for peer `%s' is %s\n",
1494 GNUNET_i2s (&n->id),
1495 GNUNET_STRINGS_relative_time_to_string (n->latency,
1497 /* append latency */
1498 ats.type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
1499 if (n->latency.rel_value_us > UINT32_MAX)
1500 latency = UINT32_MAX;
1502 latency = n->latency.rel_value_us;
1503 ats.value = htonl (latency);
1504 GST_ats_update_metrics (&n->id, n->primary_address.address,
1505 n->primary_address.session, &ats, 1);
1510 * We have received a message from the given sender. How long should
1511 * we delay before receiving more? (Also used to keep the peer marked
1514 * @param sender sender of the message
1515 * @param size size of the message
1516 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
1517 * #GNUNET_NO if the neighbour is not connected or violates the quota,
1518 * #GNUNET_SYSERR if the connection is not fully up yet
1519 * @return how long to wait before reading more from this sender
1521 struct GNUNET_TIME_Relative
1522 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1523 *sender, ssize_t size, int *do_forward)
1525 struct NeighbourMapEntry *n;
1526 struct GNUNET_TIME_Relative ret;
1528 if (NULL == neighbours)
1530 *do_forward = GNUNET_NO;
1531 return GNUNET_TIME_UNIT_FOREVER_REL; /* This can happen during shutdown */
1533 if (NULL == (n = lookup_neighbour (sender)))
1535 GST_neighbours_try_connect (sender);
1536 if (NULL == (n = lookup_neighbour (sender)))
1538 GNUNET_STATISTICS_update (GST_stats,
1540 ("# messages discarded due to lack of neighbour record"),
1542 *do_forward = GNUNET_NO;
1543 return GNUNET_TIME_UNIT_ZERO;
1546 if (! test_connected (n))
1548 *do_forward = GNUNET_SYSERR;
1549 return GNUNET_TIME_UNIT_ZERO;
1551 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1553 n->quota_violation_count++;
1554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1555 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1556 n->in_tracker.available_bytes_per_s__,
1557 n->quota_violation_count);
1558 /* Discount 32k per violation */
1559 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1563 if (n->quota_violation_count > 0)
1565 /* try to add 32k back */
1566 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1567 n->quota_violation_count--;
1570 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1572 GNUNET_STATISTICS_update (GST_stats,
1574 ("# bandwidth quota violations by other peers"),
1576 *do_forward = GNUNET_NO;
1577 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1579 *do_forward = GNUNET_YES;
1580 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1581 if (ret.rel_value_us > 0)
1583 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1584 "Throttling read (%llu bytes excess at %u b/s), waiting %s before reading more.\n",
1585 (unsigned long long) n->in_tracker.
1586 consumption_since_last_update__,
1587 (unsigned int) n->in_tracker.available_bytes_per_s__,
1588 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
1589 GNUNET_STATISTICS_update (GST_stats,
1590 gettext_noop ("# ms throttling suggested"),
1591 (int64_t) ret.rel_value_us / 1000LL,
1599 * Transmit a message to the given target using the active connection.
1601 * @param target destination
1602 * @param msg message to send
1603 * @param msg_size number of bytes in msg
1604 * @param timeout when to fail with timeout
1605 * @param cont function to call when done
1606 * @param cont_cls closure for 'cont'
1609 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1610 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1611 GST_NeighbourSendContinuation cont, void *cont_cls)
1613 struct NeighbourMapEntry *n;
1614 struct MessageQueue *mq;
1616 /* All ove these cases should never happen; they are all API violations.
1617 But we check anyway, just to be sure. */
1618 if (NULL == (n = lookup_neighbour (target)))
1622 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1625 if (GNUNET_YES != test_connected (n))
1629 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1632 bytes_in_send_queue += msg_size;
1633 GNUNET_STATISTICS_set (GST_stats,
1635 ("# bytes in message queue for other peers"),
1636 bytes_in_send_queue, GNUNET_NO);
1637 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1639 mq->cont_cls = cont_cls;
1640 memcpy (&mq[1], msg, msg_size);
1641 mq->message_buf = (const char *) &mq[1];
1642 mq->message_buf_size = msg_size;
1643 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Enqueueing %u bytes to send to peer %s\n",
1646 msg_size, GNUNET_i2s (target));
1648 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1649 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1650 GNUNET_SCHEDULER_cancel (n->task);
1651 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1655 send_session_connect_cont (void *cls,
1656 const struct GNUNET_PeerIdentity *target,
1658 size_t size_payload,
1659 size_t size_on_wire)
1661 struct NeighbourMapEntry *n;
1663 n = lookup_neighbour (target);
1666 /* CONNECT continuation was called after neighbor was freed,
1667 * for example due to a time out for the state or the session
1668 * used was already terminated: nothing to do here... */
1672 if ( (GNUNET_TRANSPORT_PS_CONNECT_SENT != n->state) &&
1673 (GNUNET_TRANSPORT_PS_RECONNECT_SENT != n->state) &&
1674 (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT != n->state))
1676 /* CONNECT continuation was called after neighbor changed state,
1677 * for example due to a time out for the state or the session
1678 * used was already terminated: nothing to do here... */
1681 if (GNUNET_OK == result)
1684 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1685 _("Failed to send CONNECT message to peer `%s' using address `%s' session %p\n"),
1686 GNUNET_i2s (target),
1687 GST_plugins_a2s (n->primary_address.address),
1688 n->primary_address.session);
1691 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
1692 /* Remove address and request and additional one */
1693 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1694 n->primary_address.session);
1695 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL );
1696 unset_primary_address (n);
1697 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1698 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
1700 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1701 /* Remove address and request and additional one */
1702 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1703 n->primary_address.session);
1704 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL );
1705 unset_primary_address (n);
1706 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
1707 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1709 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
1710 /* Remove address and request and go back to primary address */
1711 GNUNET_STATISTICS_update (GST_stats, gettext_noop
1712 ("# Failed attempts to switch addresses (failed to send CONNECT CONT)"), 1, GNUNET_NO);
1713 GNUNET_ATS_address_destroyed (GST_ats, n->alternative_address.address,
1714 n->alternative_address.session);
1715 GNUNET_ATS_address_destroyed (GST_ats, n->alternative_address.address,
1717 unset_alternative_address (n);
1718 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
1719 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1722 disconnect_neighbour (n);
1728 * Send a SESSION_CONNECT message via the given address.
1730 * @param na address to use
1733 send_session_connect (struct NeighbourAddress *na)
1735 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1736 struct SessionConnectMessage connect_msg;
1737 struct NeighbourMapEntry *n;
1739 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1740 "Sending SESSION_CONNECT message to peer `%s'\n",
1741 GNUNET_i2s (&na->address->peer));
1743 if (NULL == (papi = GST_plugins_find (na->address->transport_name)))
1748 if (NULL == na->session)
1749 na->session = papi->get_session (papi->cls, na->address);
1750 if (NULL == na->session)
1755 GNUNET_STATISTICS_update (GST_stats,
1757 ("# SESSION_CONNECT messages sent"),
1759 na->connect_timestamp = GNUNET_TIME_absolute_get ();
1760 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1761 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1762 connect_msg.reserved = htonl (0);
1763 connect_msg.timestamp = GNUNET_TIME_absolute_hton (na->connect_timestamp);
1765 papi->send (papi->cls,
1767 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1769 SETUP_CONNECTION_TIMEOUT,
1770 send_session_connect_cont, NULL))
1772 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1773 _("Failed to transmit CONNECT message via plugin to %s\n"),
1774 GST_plugins_a2s (na->address));
1776 n = lookup_neighbour (&na->address->peer);
1784 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
1785 /* Remove address and request and additional one */
1786 unset_primary_address (n);
1787 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1788 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
1789 /* Hard failure to send the CONNECT message with this address:
1790 Destroy address and session */
1792 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1793 /* Remove address and request and additional one */
1794 unset_primary_address (n);
1795 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
1796 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1798 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
1799 GNUNET_STATISTICS_update (GST_stats, gettext_noop
1800 ("# Failed attempts to switch addresses (failed to send CONNECT)"), 1, GNUNET_NO);
1801 /* Remove address and request and additional one */
1802 unset_alternative_address (n);
1803 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
1804 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1807 disconnect_neighbour (n);
1810 GNUNET_ATS_address_destroyed (GST_ats, na->address, na->session);
1811 GNUNET_ATS_address_destroyed (GST_ats, na->address, NULL);
1813 GST_neighbours_notify_data_sent (&na->address->peer,
1816 sizeof (struct SessionConnectMessage));
1821 send_session_connect_ack_cont (void *cls,
1822 const struct GNUNET_PeerIdentity *target,
1824 size_t size_payload,
1825 size_t size_on_wire)
1827 struct NeighbourMapEntry *n;
1829 n = lookup_neighbour (target);
1832 /* CONNECT_ACK continuation was called after neighbor was freed,
1833 * for example due to a time out for the state or the session
1834 * used was already terminated: nothing to do here... */
1838 if (GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK != n->state)
1840 /* CONNECT_ACK continuation was called after neighbor changed state,
1841 * for example due to a time out for the state or the session
1842 * used was already terminated: nothing to do here... */
1845 if (GNUNET_OK == result)
1848 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1849 _("Failed to send CONNECT_ACK message to peer `%s' using address `%s' session %p\n"),
1850 GNUNET_i2s (target),
1851 GST_plugins_a2s (n->primary_address.address),
1852 n->primary_address.session);
1854 /* Failed to send CONNECT_ACK message with this address */
1855 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1856 n->primary_address.session);
1857 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
1860 /* Remove address and request and additional one */
1861 unset_primary_address (n);
1862 n->ack_state = ACK_SEND_CONNECT_ACK;
1863 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS,
1864 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1870 * Send a CONNECT_ACK message via the given address.
1872 * @param address address to use
1873 * @param session session to use
1874 * @param timestamp timestamp to use for the ACK message
1875 * @return GNUNET_SYSERR if sending immediately failed, GNUNET_OK otherwise
1878 send_connect_ack_message (const struct GNUNET_HELLO_Address *address,
1879 struct Session *session,
1880 struct GNUNET_TIME_Absolute timestamp)
1882 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1883 struct SessionConnectMessage connect_msg;
1884 struct NeighbourMapEntry *n;
1886 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1887 "Sending CONNECT_ACK to peer `%s'\n",
1888 GNUNET_i2s (&address->peer));
1890 if (NULL == (papi = GST_plugins_find (address->transport_name)))
1895 if (NULL == session)
1896 session = papi->get_session (papi->cls, address);
1897 if (NULL == session)
1902 GNUNET_STATISTICS_update (GST_stats,
1904 ("# CONNECT_ACK messages sent"),
1906 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1907 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1908 connect_msg.reserved = htonl (0);
1909 connect_msg.timestamp = GNUNET_TIME_absolute_hton (timestamp);
1911 if (GNUNET_SYSERR == papi->send (papi->cls,
1913 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1915 GNUNET_TIME_UNIT_FOREVER_REL,
1916 send_session_connect_ack_cont, NULL))
1918 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1919 _("Failed to transmit CONNECT_ACK message via plugin to %s\n"),
1920 GST_plugins_a2s (address));
1922 n = lookup_neighbour (&address->peer);
1928 /* Hard failure to send the CONNECT_ACK message with this address:
1929 Destroy session (and address) */
1930 if (GNUNET_YES == GNUNET_HELLO_address_check_option(address,
1931 GNUNET_HELLO_ADDRESS_INFO_INBOUND))
1933 GNUNET_ATS_address_destroyed (GST_ats, address, session);
1934 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
1937 GNUNET_ATS_address_destroyed (GST_ats, address, session);
1939 /* Remove address and request and additional one */
1940 unset_primary_address (n);
1941 n->ack_state = ACK_SEND_CONNECT_ACK;
1942 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS,
1943 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1949 struct QuotaNotificationRequest
1951 struct GNUNET_PeerIdentity peer;
1952 struct Session *session;
1956 struct QNR_LookContext
1958 struct GNUNET_PeerIdentity peer;
1959 struct Session *session;
1962 struct QuotaNotificationRequest *res;
1966 find_notification_request (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1968 struct QNR_LookContext *qnr_ctx = cls;
1969 struct QuotaNotificationRequest *qnr = value;
1971 if ((qnr->session == qnr_ctx->session) &&
1972 (0 == memcmp (&qnr->peer, &qnr_ctx->peer, sizeof (struct GNUNET_PeerIdentity))) &&
1973 (0 == strcmp(qnr_ctx->plugin, qnr->plugin)))
1975 qnr_ctx->res = value;
1982 GST_neighbours_register_quota_notification(void *cls,
1983 const struct GNUNET_PeerIdentity *peer, const char *plugin,
1984 struct Session *session)
1986 struct QuotaNotificationRequest *qnr;
1987 struct QNR_LookContext qnr_ctx;
1989 if (NULL == registered_quota_notifications)
1991 return; /* init or shutdown */
1994 qnr_ctx.peer = (*peer);
1995 qnr_ctx.plugin = plugin;
1996 qnr_ctx.session = session;
1999 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
2000 peer, &find_notification_request, &qnr_ctx);
2001 if (NULL != qnr_ctx.res)
2007 qnr = GNUNET_new (struct QuotaNotificationRequest);
2008 qnr->peer = (*peer);
2009 qnr->plugin = GNUNET_strdup (plugin);
2010 qnr->session = session;
2012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2013 "Adding notification for peer `%s' plugin `%s' session %p \n",
2014 GNUNET_i2s (peer), plugin, session);
2016 GNUNET_CONTAINER_multipeermap_put (registered_quota_notifications, peer,
2017 qnr, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2022 GST_neighbours_unregister_quota_notification(void *cls,
2023 const struct GNUNET_PeerIdentity *peer, const char *plugin, struct Session *session)
2025 struct QNR_LookContext qnr_ctx;
2027 if (NULL == registered_quota_notifications)
2029 return; /* init or shutdown */
2032 qnr_ctx.peer = (*peer);
2033 qnr_ctx.plugin = plugin;
2034 qnr_ctx.session = session;
2037 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
2038 &find_notification_request, &qnr_ctx);
2039 if (NULL == qnr_ctx.res)
2045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2046 "Removing notification for peer `%s' plugin `%s' session %p \n",
2047 GNUNET_i2s (peer), plugin, session);
2049 GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, peer,
2051 GNUNET_free (qnr_ctx.res->plugin);
2052 GNUNET_free (qnr_ctx.res);
2056 notification_cb(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
2058 /* struct NeighbourMapEntry *n = cls; */
2059 struct QuotaNotificationRequest *qnr = value;
2060 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2061 struct GNUNET_TIME_Relative delay;
2064 papi = GST_plugins_find(qnr->plugin);
2071 delay = GST_neighbours_calculate_receive_delay (key, 0, &do_forward);
2072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2073 "New inbound delay for peer `%s' is %llu ms\n", GNUNET_i2s (key),
2074 delay.rel_value_us / 1000);
2076 if (NULL != papi->update_inbound_delay)
2077 papi->update_inbound_delay (papi->cls, key, qnr->session, delay);
2082 free_notification_cb(void *cls, const struct GNUNET_PeerIdentity *key,
2085 /* struct NeighbourMapEntry *n = cls; */
2086 struct QuotaNotificationRequest *qnr = value;
2088 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, key,
2090 GNUNET_free(qnr->plugin);
2097 inbound_bw_tracker_update(void *cls)
2099 struct NeighbourMapEntry *n = cls;
2101 /* Quota was updated, tell plugins to update the time to receive next */
2102 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
2103 &n->id, ¬ification_cb, n);
2108 * Create a fresh entry in the neighbour map for the given peer
2110 * @param peer peer to create an entry for
2111 * @return new neighbour map entry
2113 static struct NeighbourMapEntry *
2114 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
2116 struct NeighbourMapEntry *n;
2118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2119 "Creating new neighbour entry for `%s'\n",
2121 n = GNUNET_new (struct NeighbourMapEntry);
2123 n->ack_state = ACK_UNDEFINED;
2124 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
2125 n->last_util_transmission = GNUNET_TIME_absolute_get();
2126 n->util_payload_bytes_recv = 0;
2127 n->util_payload_bytes_sent = 0;
2128 n->util_total_bytes_recv = 0;
2129 n->util_total_bytes_sent = 0;
2130 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker, &inbound_bw_tracker_update, n,
2131 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
2132 MAX_BANDWIDTH_CARRY_S);
2133 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
2134 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_FOREVER_ABS);
2135 GNUNET_assert (GNUNET_OK ==
2136 GNUNET_CONTAINER_multipeermap_put (neighbours,
2138 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
2142 /* We received a address suggestion after requesting an address in
2143 * try_connect or after receiving a connect, switch to address
2146 address_suggest_cont (void *cls,
2147 const struct GNUNET_PeerIdentity *peer,
2148 const struct GNUNET_HELLO_Address *address, struct Session *session,
2149 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
2150 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
2151 const struct GNUNET_ATS_Information *ats, uint32_t ats_count)
2153 GST_neighbours_switch_to_address(peer, address, session, ats, ats_count,
2154 bandwidth_in, bandwidth_out);
2158 struct BlacklistCheckSwitchContext
2160 struct BlacklistCheckSwitchContext *prev;
2161 struct BlacklistCheckSwitchContext *next;
2164 struct GST_BlacklistCheck *blc;
2166 struct GNUNET_HELLO_Address *address;
2167 struct Session *session;
2168 struct GNUNET_ATS_Information *ats;
2171 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
2172 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
2176 * Black list check result for try_connect call
2177 * If connection to the peer is allowed request adddress and
2179 * @param cls blc_ctx bl context
2180 * @param peer the peer
2181 * @param result the result
2184 try_connect_bl_check_cont (void *cls,
2185 const struct GNUNET_PeerIdentity *peer, int result)
2187 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2188 struct NeighbourMapEntry *n;
2190 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2191 GNUNET_free (blc_ctx);
2193 if (GNUNET_OK != result)
2195 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2196 _("Blacklisting disapproved to connect to peer `%s'\n"),
2201 /* Setup a new neighbour */
2202 n = setup_neighbour (peer);
2204 /* Request address suggestions for this peer */
2205 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
2206 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2207 GNUNET_ATS_reset_backoff (GST_ats, peer);
2208 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer,
2209 &address_suggest_cont, n);
2215 * Try to create a connection to the given target (eventually).
2217 * @param target peer to try to connect to
2220 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
2222 struct NeighbourMapEntry *n;
2223 struct GST_BlacklistCheck *blc;
2224 struct BlacklistCheckSwitchContext *blc_ctx;
2226 if (NULL == neighbours)
2228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2229 "Asked to connect to peer `%s' during shutdown\n",
2230 GNUNET_i2s (target));
2231 return; /* during shutdown, do nothing */
2233 n = lookup_neighbour (target);
2234 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2235 "Asked to connect to peer `%s' (state: %s)\n",
2236 GNUNET_i2s (target),
2237 (NULL != n) ? GNUNET_TRANSPORT_ps2s(n->state) : "NEW PEER");
2242 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2243 /* this should not be possible */
2245 free_neighbour (n, GNUNET_NO);
2247 case GNUNET_TRANSPORT_PS_INIT_ATS:
2248 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2249 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2250 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2251 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2252 "Ignoring request to try to connect to `%s', already trying!\n",
2253 GNUNET_i2s (target));
2254 return; /* already trying */
2255 case GNUNET_TRANSPORT_PS_CONNECTED:
2256 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2257 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2258 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2259 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2260 "Ignoring request to try to connect, already connected to `%s'!\n",
2261 GNUNET_i2s (target));
2262 return; /* already connected */
2263 case GNUNET_TRANSPORT_PS_DISCONNECT:
2264 /* get rid of remains, ready to re-try immediately */
2265 free_neighbour (n, GNUNET_NO);
2267 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2268 /* should not be possible */
2272 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2273 "Unhandled state `%s'\n",
2274 GNUNET_TRANSPORT_ps2s (n->state));
2276 free_neighbour (n, GNUNET_NO);
2281 /* Do blacklist check if connecting to this peer is allowed */
2282 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2283 GNUNET_CONTAINER_DLL_insert (pending_bc_head, pending_bc_tail, blc_ctx);
2285 if (NULL != (blc = GST_blacklist_test_allowed (target, NULL,
2286 &try_connect_bl_check_cont, blc_ctx)))
2294 * We received a 'SESSION_CONNECT' message from the other peer.
2295 * Consider switching to it.
2297 * @param message possibly a 'struct SessionConnectMessage' (check format)
2298 * @param peer identity of the peer to switch the address for
2299 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
2302 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2303 const struct GNUNET_PeerIdentity *peer)
2305 const struct SessionConnectMessage *scm;
2306 struct NeighbourMapEntry *n;
2307 struct GNUNET_TIME_Absolute ts;
2309 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2311 GNUNET_break_op (0);
2312 return GNUNET_SYSERR;
2314 GNUNET_STATISTICS_update (GST_stats,
2316 ("# CONNECT messages received"),
2318 if (NULL == neighbours)
2320 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2321 _("CONNECT request from peer `%s' ignored due impending shutdown\n"),
2323 return GNUNET_OK; /* we're shutting down */
2325 scm = (const struct SessionConnectMessage *) message;
2326 GNUNET_break_op (0 == ntohl (scm->reserved));
2327 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2328 n = lookup_neighbour (peer);
2331 /* This is a new neighbour and set to not connected */
2332 n = setup_neighbour (peer);
2335 /* Remember this CONNECT message in neighbour */
2336 n->ack_state = ACK_SEND_CONNECT_ACK;
2337 n->connect_ack_timestamp = ts;
2339 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2340 "Received CONNECT for peer `%s' in state %s/%s\n",
2342 GNUNET_TRANSPORT_ps2s (n->state),
2343 print_ack_state (n->ack_state));
2347 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2348 /* Request an address from ATS to send CONNECT_ACK to this peer */
2349 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS,
2350 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2351 if (NULL == n->suggest_handle)
2352 GNUNET_ATS_suggest_address (GST_ats, peer, address_suggest_cont, n);
2354 case GNUNET_TRANSPORT_PS_INIT_ATS:
2355 /* CONNECT message takes priority over us asking ATS for address:
2356 * Wait for ATS to suggest an address and send CONNECT_ACK */
2357 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS,
2358 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2360 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2361 /* We already wait for an address to send an CONNECT_ACK */
2363 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2364 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2365 /* Send ACK immediately */
2366 n->ack_state = ACK_SEND_SESSION_ACK;
2367 send_connect_ack_message (n->primary_address.address,
2368 n->primary_address.session, ts);
2370 case GNUNET_TRANSPORT_PS_CONNECTED:
2371 /* we are already connected and can thus send the ACK immediately */
2372 GNUNET_assert (NULL != n->primary_address.address);
2373 GNUNET_assert (NULL != n->primary_address.session);
2374 n->ack_state = ACK_SEND_SESSION_ACK;
2375 send_connect_ack_message (n->primary_address.address,
2376 n->primary_address.session, ts);
2378 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2379 /* We wait for ATS address suggestion */
2381 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2382 /* We received a CONNECT message while waiting for a CONNECT_ACK in fast
2383 * reconnect. Send CONNECT_ACK immediately */
2384 n->ack_state = ACK_SEND_SESSION_ACK;
2385 send_connect_ack_message (n->primary_address.address,
2386 n->primary_address.session, n->connect_ack_timestamp);
2388 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2389 /* We are already connected and can thus send the ACK immediately;
2390 still, it can never hurt to have an alternative address, so also
2391 tell ATS about it */
2392 GNUNET_assert (NULL != n->primary_address.address);
2393 GNUNET_assert (NULL != n->primary_address.session);
2394 n->ack_state = ACK_SEND_SESSION_ACK;
2395 send_connect_ack_message (n->primary_address.address,
2396 n->primary_address.session, ts);
2398 case GNUNET_TRANSPORT_PS_DISCONNECT:
2399 /* Get rid of remains without terminating sessions, ready to re-try */
2400 free_neighbour (n, GNUNET_YES);
2401 n = setup_neighbour (peer);
2402 /* Remember the CONNECT time stamp for ACK message */
2403 n->ack_state = ACK_SEND_CONNECT_ACK;
2404 n->connect_ack_timestamp = ts;
2405 /* Request an address for the peer */
2406 GNUNET_ATS_suggest_address (GST_ats, peer, address_suggest_cont, n);
2407 GNUNET_ATS_reset_backoff (GST_ats, peer);
2408 set_state (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS);
2410 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2411 /* should not be possible */
2415 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2416 "Unhandled state `%s'\n",
2417 GNUNET_TRANSPORT_ps2s (n->state));
2419 return GNUNET_SYSERR;
2425 switch_address_bl_check_cont (void *cls,
2426 const struct GNUNET_PeerIdentity *peer, int result)
2428 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2429 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2430 struct NeighbourMapEntry *n;
2432 papi = GST_plugins_find (blc_ctx->address->transport_name);
2434 if ( (NULL == (n = lookup_neighbour (peer))) || (result == GNUNET_NO) ||
2439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2440 "Peer %s is unknown, suggestion ignored\n",
2443 if (result == GNUNET_NO)
2445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2446 "Blacklist denied to switch to suggested address `%s' session %p for peer `%s'\n",
2447 GST_plugins_a2s (blc_ctx->address),
2449 GNUNET_i2s (&blc_ctx->address->peer));
2453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2454 "Plugin `%s' for suggested address `%s' session %p for peer `%s' is not available\n",
2455 blc_ctx->address->transport_name,
2456 GST_plugins_a2s (blc_ctx->address),
2458 GNUNET_i2s (&blc_ctx->address->peer));
2461 /* This address is blacklisted, delete address and session (if existing) in ATS */
2462 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, blc_ctx->session);
2464 if ( (GNUNET_YES == (GNUNET_HELLO_address_check_option (blc_ctx->address,
2465 GNUNET_HELLO_ADDRESS_INFO_INBOUND))) && (NULL != blc_ctx->session))
2467 /* This is an inbound address, destroy full address */
2468 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, NULL );
2471 /* Remove blacklist check and clean up */
2472 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2473 GNUNET_HELLO_address_free (blc_ctx->address);
2474 GNUNET_free_non_null (blc_ctx->ats);
2475 GNUNET_free (blc_ctx);
2479 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2480 "Blacklist accepted address `%s' session %p for peer `%s'\n",
2481 GST_plugins_a2s (blc_ctx->address),
2483 GNUNET_i2s (&blc_ctx->address->peer));
2485 if (NULL == blc_ctx->session)
2487 blc_ctx->session = papi->get_session (papi->cls, blc_ctx->address);
2488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2489 "Obtained new session for peer `%s' and address '%s': %p\n",
2490 GNUNET_i2s (&blc_ctx->address->peer), GST_plugins_a2s (blc_ctx->address), blc_ctx->session);
2492 if (NULL == blc_ctx->session)
2494 /* No session could be obtained, remove blacklist check and clean up */
2495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2496 "Failed to obtain new session for peer `%s' and address '%s'\n",
2497 GNUNET_i2s (&blc_ctx->address->peer),
2498 GST_plugins_a2s (blc_ctx->address));
2499 /* Delete address in ATS */
2500 GNUNET_ATS_address_destroyed (GST_ats, blc_ctx->address, NULL);
2502 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2503 GNUNET_HELLO_address_free (blc_ctx->address);
2504 GNUNET_free_non_null (blc_ctx->ats);
2505 GNUNET_free (blc_ctx);
2509 if ( (NULL != n->primary_address.address) &&
2510 (0 == GNUNET_HELLO_address_cmp(blc_ctx->address, n->primary_address.address)) )
2512 if (blc_ctx->session == n->primary_address.session)
2514 /* This address is already primary, update only quotas */
2515 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Update with same address!\n");
2517 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2518 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2520 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2521 GNUNET_HELLO_address_free(blc_ctx->address);
2522 GNUNET_free_non_null (blc_ctx->ats);
2523 GNUNET_free (blc_ctx);
2531 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2533 free_neighbour (n, GNUNET_NO);
2535 case GNUNET_TRANSPORT_PS_INIT_ATS:
2536 /* We requested an address and ATS suggests one:
2537 * set primary address and send CONNECT message*/
2538 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2539 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2540 if ( (ACK_SEND_CONNECT_ACK == n->ack_state) )
2542 /* Send pending CONNECT_ACK message */
2543 n->ack_state = ACK_SEND_SESSION_ACK;
2544 send_connect_ack_message (n->primary_address.address,
2545 n->primary_address.session, n->connect_ack_timestamp);
2547 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_SENT,
2548 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2549 send_session_connect (&n->primary_address);
2551 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2552 /* ATS suggested a new address while waiting for an CONNECT_ACK:
2553 * Switch and send new CONNECT */
2554 /* ATS suggests a different address, switch again */
2555 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2556 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2557 if (ACK_SEND_CONNECT_ACK == n->ack_state)
2559 /* Send pending CONNECT_ACK message */
2560 n->ack_state = ACK_SEND_SESSION_ACK;
2561 send_connect_ack_message (n->primary_address.address,
2562 n->primary_address.session, n->connect_ack_timestamp);
2564 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_SENT,
2565 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2566 send_session_connect (&n->primary_address);
2568 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2569 /* We requested an address and ATS suggests one:
2570 * set primary address and send CONNECT_ACK message*/
2571 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2572 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2573 /* Send an ACK message as a response to the CONNECT msg */
2574 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK,
2575 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2576 send_connect_ack_message (n->primary_address.address,
2577 n->primary_address.session,
2578 n->connect_ack_timestamp);
2579 if ( (ACK_SEND_CONNECT_ACK == n->ack_state) ||
2580 (ACK_UNDEFINED == n->ack_state) )
2581 n->ack_state = ACK_SEND_SESSION_ACK;
2583 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2584 /* ATS asks us to switch while we were trying to connect; switch to new
2585 address and check blacklist again */
2586 if ( (ACK_SEND_CONNECT_ACK == n->ack_state) )
2588 n->ack_state = ACK_SEND_SESSION_ACK;
2589 send_connect_ack_message (n->primary_address.address,
2590 n->primary_address.session, n->connect_ack_timestamp);
2592 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2593 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2594 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK,
2595 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2597 case GNUNET_TRANSPORT_PS_CONNECTED:
2598 GNUNET_assert (NULL != n->primary_address.address);
2599 GNUNET_assert (NULL != n->primary_address.session);
2600 if (n->primary_address.session == blc_ctx->session)
2602 /* not an address change, just a quota change */
2603 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2604 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_YES);
2607 /* ATS asks us to switch a life connection; see if we can get
2608 a CONNECT_ACK on it before we actually do this! */
2609 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2610 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2611 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT,
2612 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2613 GNUNET_STATISTICS_update (GST_stats, gettext_noop
2614 ("# Attempts to switch addresses"), 1, GNUNET_NO);
2615 send_session_connect (&n->alternative_address);
2617 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2618 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2619 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2620 if ( (ACK_SEND_CONNECT_ACK == n->ack_state) )
2622 /* Send pending CONNECT_ACK message */
2623 n->ack_state = ACK_SEND_SESSION_ACK;
2624 send_connect_ack_message (n->primary_address.address,
2625 n->primary_address.session, n->connect_ack_timestamp);
2627 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT,
2628 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2629 send_session_connect (&n->primary_address);
2631 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2632 /* ATS asks us to switch while we were trying to reconnect; switch to new
2633 address and send CONNECT again */
2634 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2635 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2636 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT,
2637 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2638 send_session_connect (&n->primary_address);
2640 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
2641 if ( (0 == GNUNET_HELLO_address_cmp(n->primary_address.address,
2642 blc_ctx->address) && n->primary_address.session == blc_ctx->session) )
2644 /* ATS switches back to still-active session */
2645 free_address (&n->alternative_address);
2646 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
2649 /* ATS asks us to switch a life connection, send */
2650 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2651 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2652 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT,
2653 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2654 send_session_connect (&n->alternative_address);
2656 case GNUNET_TRANSPORT_PS_DISCONNECT:
2657 /* not going to switch addresses while disconnecting */
2659 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2663 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2664 "Unhandled state `%s'\n",
2665 GNUNET_TRANSPORT_ps2s (n->state));
2670 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2671 GNUNET_HELLO_address_free(blc_ctx->address);
2672 GNUNET_free_non_null (blc_ctx->ats);
2673 GNUNET_free (blc_ctx);
2679 * For the given peer, switch to this address.
2681 * Before accepting this addresses and actively using it, a blacklist check
2682 * is performed. If this blacklist check fails the address will be destroyed.
2684 * @param peer identity of the peer to switch the address for
2685 * @param address address of the other peer,
2686 * @param session session to use or NULL if transport should initiate a session
2687 * @param ats performance data
2688 * @param ats_count number of entries in ats
2689 * @param bandwidth_in inbound quota to be used when connection is up,
2690 * 0 to disconnect from peer
2691 * @param bandwidth_out outbound quota to be used when connection is up,
2692 * 0 to disconnect from peer
2695 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
2696 const struct GNUNET_HELLO_Address *address,
2697 struct Session *session,
2698 const struct GNUNET_ATS_Information *ats,
2700 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
2701 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
2703 struct NeighbourMapEntry *n;
2704 struct GST_BlacklistCheck *blc;
2705 struct BlacklistCheckSwitchContext *blc_ctx;
2708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2709 "ATS has decided on an address for peer %s\n",
2711 GNUNET_assert (NULL != address->transport_name);
2712 if (NULL == (n = lookup_neighbour (peer)))
2714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2715 "Peer %s is unknown, suggestion ignored\n",
2720 /* Check if plugin is available */
2721 if (NULL == (GST_plugins_find (address->transport_name)))
2723 /* we don't have the plugin for this address */
2724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2725 "Plugin `%s' is unknown, suggestion for peer %s ignored\n",
2726 address->transport_name,
2728 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2731 if ((NULL == session) &&
2732 (GNUNET_HELLO_address_check_option (address, GNUNET_HELLO_ADDRESS_INFO_INBOUND)))
2734 /* This is a inbound address and we do not have a session to use! */
2735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2736 "Inbound address without session `%s'! Destroying address...\n",
2737 GST_plugins_a2s (address));
2738 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2742 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2743 "ATS suggests %s address '%s' session %p for "
2744 "peer `%s' in state %s/%s \n",
2745 GNUNET_HELLO_address_check_option (address,
2746 GNUNET_HELLO_ADDRESS_INFO_INBOUND) ? "inbound" : "outbound",
2747 GST_plugins_a2s (address), session, GNUNET_i2s (peer),
2748 GNUNET_TRANSPORT_ps2s (n->state), print_ack_state (n->ack_state));
2750 /* Perform blacklist check */
2751 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2752 blc_ctx->address = GNUNET_HELLO_address_copy (address);
2753 blc_ctx->session = session;
2754 blc_ctx->bandwidth_in = bandwidth_in;
2755 blc_ctx->bandwidth_out = bandwidth_out;
2756 blc_ctx->ats_count = ats_count;
2757 blc_ctx->ats = NULL;
2760 blc_ctx->ats = GNUNET_malloc (ats_count * sizeof (struct GNUNET_ATS_Information));
2761 for (c = 0; c < ats_count; c++)
2763 blc_ctx->ats[c].type = ats[c].type;
2764 blc_ctx->ats[c].value = ats[c].value;
2768 GNUNET_CONTAINER_DLL_insert (pending_bc_head, pending_bc_tail, blc_ctx);
2769 if (NULL != (blc = GST_blacklist_test_allowed (peer, address->transport_name,
2770 &switch_address_bl_check_cont, blc_ctx)))
2778 send_utilization_data (void *cls,
2779 const struct GNUNET_PeerIdentity *key,
2782 struct NeighbourMapEntry *n = value;
2783 struct GNUNET_ATS_Information atsi[4];
2785 uint32_t bps_pl_out;
2788 struct GNUNET_TIME_Relative delta;
2790 delta = GNUNET_TIME_absolute_get_difference (n->last_util_transmission,
2791 GNUNET_TIME_absolute_get ());
2795 if ((0 != n->util_payload_bytes_recv) && (0 != delta.rel_value_us))
2796 bps_pl_in = (1000LL * 1000LL * n->util_payload_bytes_recv) / (delta.rel_value_us);
2798 if ((0 != n->util_payload_bytes_sent) && (0 != delta.rel_value_us))
2799 bps_pl_out = (1000LL * 1000LL * n->util_payload_bytes_sent) / delta.rel_value_us;
2800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2801 "`%s' payload: received %u Bytes/s, sent %u Bytes/s\n",
2806 if ((0 != n->util_total_bytes_recv) && (0 != delta.rel_value_us))
2807 bps_in = (1000LL * 1000LL * n->util_total_bytes_recv) / (delta.rel_value_us);
2809 if ((0 != n->util_total_bytes_sent) && (0 != delta.rel_value_us))
2810 bps_out = (1000LL * 1000LL * n->util_total_bytes_sent) / delta.rel_value_us;
2813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2814 "`%s' total: received %u Bytes/s, sent %u Bytes/s\n",
2818 atsi[0].type = htonl (GNUNET_ATS_UTILIZATION_OUT);
2819 atsi[0].value = htonl (bps_out);
2820 atsi[1].type = htonl (GNUNET_ATS_UTILIZATION_IN);
2821 atsi[1].value = htonl (bps_in);
2823 atsi[2].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_OUT);
2824 atsi[2].value = htonl (bps_pl_out);
2825 atsi[3].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_IN);
2826 atsi[3].value = htonl (bps_pl_in);
2828 GST_ats_update_metrics (key, n->primary_address.address,
2829 n->primary_address.session, atsi, 4);
2830 n->util_payload_bytes_recv = 0;
2831 n->util_payload_bytes_sent = 0;
2832 n->util_total_bytes_recv = 0;
2833 n->util_total_bytes_sent = 0;
2834 n->last_util_transmission = GNUNET_TIME_absolute_get();
2840 * Task transmitting utilization in a regular interval
2842 * @param cls the 'struct NeighbourMapEntry' for which we are running
2843 * @param tc scheduler context (unused)
2846 utilization_transmission (void *cls,
2847 const struct GNUNET_SCHEDULER_TaskContext *tc)
2849 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
2851 if (0 < GNUNET_CONTAINER_multipeermap_size (neighbours))
2852 GNUNET_CONTAINER_multipeermap_iterate (neighbours, send_utilization_data, NULL);
2854 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
2855 utilization_transmission, NULL);
2861 GST_neighbours_notify_data_recv (const struct GNUNET_PeerIdentity *peer,
2862 const struct GNUNET_HELLO_Address *address,
2863 struct Session *session,
2864 const struct GNUNET_MessageHeader *message)
2866 struct NeighbourMapEntry *n;
2868 n = lookup_neighbour (peer);
2871 n->util_total_bytes_recv += ntohs(message->size);
2876 GST_neighbours_notify_payload_recv (const struct GNUNET_PeerIdentity *peer,
2877 const struct GNUNET_HELLO_Address *address,
2878 struct Session *session,
2879 const struct GNUNET_MessageHeader *message)
2881 struct NeighbourMapEntry *n;
2882 n = lookup_neighbour (peer);
2885 n->util_payload_bytes_recv += ntohs(message->size);
2890 GST_neighbours_notify_data_sent (const struct GNUNET_PeerIdentity *peer,
2891 const struct GNUNET_HELLO_Address *address,
2892 struct Session *session,
2895 struct NeighbourMapEntry *n;
2896 n = lookup_neighbour (peer);
2899 if (n->primary_address.session != session)
2901 n->util_total_bytes_sent += size;
2906 GST_neighbours_notify_payload_sent (const struct GNUNET_PeerIdentity *peer,
2909 struct NeighbourMapEntry *n;
2910 n = lookup_neighbour (peer);
2913 n->util_payload_bytes_sent += size;
2918 * Master task run for every neighbour. Performs all of the time-related
2919 * activities (keep alive, send next message, disconnect if idle, finish
2920 * clean up after disconnect).
2922 * @param cls the 'struct NeighbourMapEntry' for which we are running
2923 * @param tc scheduler context (unused)
2926 master_task (void *cls,
2927 const struct GNUNET_SCHEDULER_TaskContext *tc)
2929 struct NeighbourMapEntry *n = cls;
2930 struct GNUNET_TIME_Relative delay;
2932 n->task = GNUNET_SCHEDULER_NO_TASK;
2933 delay = GNUNET_TIME_absolute_get_remaining (n->timeout);
2934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2935 "Master task runs for neighbour `%s' in state %s with timeout in %s\n",
2936 GNUNET_i2s (&n->id),
2937 GNUNET_TRANSPORT_ps2s(n->state),
2938 GNUNET_STRINGS_relative_time_to_string (delay,
2942 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2943 /* invalid state for master task, clean up */
2945 free_neighbour (n, GNUNET_NO);
2947 case GNUNET_TRANSPORT_PS_INIT_ATS:
2948 if (0 == delay.rel_value_us)
2950 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2951 "Connection to `%s' timed out waiting for ATS to provide address\n",
2952 GNUNET_i2s (&n->id));
2953 free_neighbour (n, GNUNET_NO);
2957 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
2958 if (0 == delay.rel_value_us)
2960 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2961 "Connection to `%s' timed out waiting for other peer to send CONNECT_ACK\n",
2962 GNUNET_i2s (&n->id));
2963 /* We could not send to this address, delete address and session */
2964 if (NULL != n->primary_address.session)
2965 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address,
2966 n->primary_address.session);
2967 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL);
2969 /* Remove address and request and additional one */
2970 unset_primary_address (n);
2971 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
2972 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2976 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
2977 if (0 == delay.rel_value_us)
2979 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2980 "Connection to `%s' timed out waiting ATS to provide address to use for CONNECT_ACK\n",
2981 GNUNET_i2s (&n->id));
2982 free_neighbour (n, GNUNET_NO);
2986 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
2987 if (0 == delay.rel_value_us)
2989 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2990 "Connection to `%s' timed out waiting for other peer to send SESSION_ACK\n",
2991 GNUNET_i2s (&n->id));
2992 disconnect_neighbour (n);
2996 case GNUNET_TRANSPORT_PS_CONNECTED:
2997 if (0 == delay.rel_value_us)
2999 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3000 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
3001 GNUNET_i2s (&n->id));
3002 disconnect_neighbour (n);
3005 try_transmission_to_peer (n);
3008 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3009 if (0 == delay.rel_value_us)
3011 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3012 "Connection to `%s' timed out, waiting for ATS replacement address\n",
3013 GNUNET_i2s (&n->id));
3014 disconnect_neighbour (n);
3018 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3019 if (0 == delay.rel_value_us)
3021 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3022 "Connection to `%s' timed out, waiting for other peer to CONNECT_ACK replacement address\n",
3023 GNUNET_i2s (&n->id));
3024 disconnect_neighbour (n);
3028 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3029 if (0 == delay.rel_value_us)
3031 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3032 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs (after trying to CONNECT on alternative address)\n",
3033 GNUNET_i2s (&n->id));
3034 GNUNET_STATISTICS_update (GST_stats, gettext_noop
3035 ("# Failed attempts to switch addresses (no response)"), 1, GNUNET_NO);
3036 disconnect_neighbour (n);
3039 try_transmission_to_peer (n);
3042 case GNUNET_TRANSPORT_PS_DISCONNECT:
3043 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3044 "Cleaning up connection to `%s' after sending DISCONNECT\n",
3045 GNUNET_i2s (&n->id));
3046 free_neighbour (n, GNUNET_NO);
3048 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3049 /* how did we get here!? */
3053 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3054 "Unhandled state `%s'\n",
3055 GNUNET_TRANSPORT_ps2s (n->state));
3059 if ( (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT == n->state) ||
3060 (GNUNET_TRANSPORT_PS_CONNECTED == n->state) )
3062 /* if we are *now* in one of the two states, we're sending
3063 keep alive messages, so we need to consider the keepalive
3064 delay, not just the connection timeout */
3065 delay = GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time),
3068 if (GNUNET_SCHEDULER_NO_TASK == n->task)
3069 n->task = GNUNET_SCHEDULER_add_delayed (delay,
3076 * Send a SESSION_ACK message to the neighbour to confirm that we
3077 * got his CONNECT_ACK.
3079 * @param n neighbour to send the SESSION_ACK to
3082 send_session_ack_message (struct NeighbourMapEntry *n)
3084 struct GNUNET_MessageHeader msg;
3086 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Sending SESSION_ACK message to peer `%s'\n",
3087 GNUNET_i2s (&n->id));
3089 msg.size = htons (sizeof (struct GNUNET_MessageHeader));
3090 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
3091 (void) send_with_session(n,
3092 (const char *) &msg, sizeof (struct GNUNET_MessageHeader),
3093 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_NO,
3099 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
3100 * Consider switching to it.
3102 * @param message possibly a 'struct SessionConnectMessage' (check format)
3103 * @param peer identity of the peer to switch the address for
3104 * @param address address of the other peer, NULL if other peer
3106 * @param session session to use (or NULL)
3107 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3110 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
3111 const struct GNUNET_PeerIdentity *peer,
3112 const struct GNUNET_HELLO_Address *address,
3113 struct Session *session)
3115 const struct SessionConnectMessage *scm;
3116 struct GNUNET_TIME_Absolute ts;
3117 struct NeighbourMapEntry *n;
3119 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3120 "Received CONNECT_ACK message from peer `%s'\n",
3123 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
3125 GNUNET_break_op (0);
3126 return GNUNET_SYSERR;
3128 GNUNET_STATISTICS_update (GST_stats,
3130 ("# CONNECT_ACK messages received"),
3132 scm = (const struct SessionConnectMessage *) message;
3133 GNUNET_break_op (ntohl (scm->reserved) == 0);
3134 if (NULL == (n = lookup_neighbour (peer)))
3136 GNUNET_STATISTICS_update (GST_stats,
3138 ("# unexpected CONNECT_ACK messages (no peer)"),
3140 return GNUNET_SYSERR;
3142 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
3145 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3147 free_neighbour (n, GNUNET_NO);
3148 return GNUNET_SYSERR;
3149 case GNUNET_TRANSPORT_PS_INIT_ATS:
3150 GNUNET_STATISTICS_update (GST_stats,
3152 ("# unexpected CONNECT_ACK messages (not ready)"),
3155 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3156 if (ts.abs_value_us != n->primary_address.connect_timestamp.abs_value_us)
3158 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3159 "CONNECT_ACK ignored as the timestamp does not match our CONNECT request\n");
3162 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3163 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3164 GNUNET_STATISTICS_set (GST_stats,
3165 gettext_noop ("# peers connected"),
3166 ++neighbours_connected,
3168 connect_notify_cb (callback_cls, &n->id,
3169 n->primary_address.bandwidth_in,
3170 n->primary_address.bandwidth_out);
3171 /* Tell ATS that the outbound session we created to send CONNECT was successful */
3172 GST_ats_add_address (n->primary_address.address,
3173 n->primary_address.session,
3175 set_primary_address (n,
3176 n->primary_address.address,
3177 n->primary_address.session,
3178 n->primary_address.bandwidth_in,
3179 n->primary_address.bandwidth_out,
3181 send_session_ack_message (n);
3183 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3184 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3185 GNUNET_STATISTICS_update (GST_stats,
3187 ("# unexpected CONNECT_ACK messages (not ready)"),
3190 case GNUNET_TRANSPORT_PS_CONNECTED:
3191 /* duplicate CONNECT_ACK, let's answer by duplicate SESSION_ACK just in case */
3192 send_session_ack_message (n);
3194 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3195 /* we didn't expect any CONNECT_ACK, as we are waiting for ATS
3196 to give us a new address... */
3197 GNUNET_STATISTICS_update (GST_stats,
3199 ("# unexpected CONNECT_ACK messages (waiting on ATS)"),
3202 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3203 /* Reconnecting with new address address worked; go back to connected! */
3204 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3205 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3206 send_session_ack_message (n);
3208 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3209 /* new address worked; adopt it and go back to connected! */
3210 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3211 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3212 GNUNET_break (GNUNET_NO == n->alternative_address.ats_active);
3214 /* Notify about session... perhaps we obtained it */
3215 GST_ats_add_address (n->alternative_address.address,
3216 n->alternative_address.session, NULL, 0);
3217 /* Set primary addresses */
3218 set_primary_address (n, n->alternative_address.address,
3219 n->alternative_address.session, n->alternative_address.bandwidth_in,
3220 n->alternative_address.bandwidth_out, GNUNET_YES);
3221 GNUNET_STATISTICS_update (GST_stats, gettext_noop
3222 ("# Successful attempts to switch addresses"), 1, GNUNET_NO);
3224 free_address (&n->alternative_address);
3225 send_session_ack_message (n);
3227 case GNUNET_TRANSPORT_PS_DISCONNECT:
3228 GNUNET_STATISTICS_update (GST_stats,
3230 ("# unexpected CONNECT_ACK messages (disconnecting)"),
3232 return GNUNET_SYSERR;
3233 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3237 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3238 "Unhandled state `%s'\n",
3239 GNUNET_TRANSPORT_ps2s (n->state));
3241 return GNUNET_SYSERR;
3248 * A session was terminated. Take note; if needed, try to get
3249 * an alternative address from ATS.
3251 * @param peer identity of the peer where the session died
3252 * @param session session that is gone
3253 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
3254 * this session was not in use
3257 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
3258 struct Session *session)
3260 struct NeighbourMapEntry *n;
3261 struct BlackListCheckContext *bcc;
3262 struct BlackListCheckContext *bcc_next;
3264 /* make sure to cancel all ongoing blacklist checks involving 'session' */
3266 while (NULL != (bcc = bcc_next))
3268 bcc_next = bcc->next;
3269 if (bcc->na.session == session)
3271 if (NULL != bcc->bc)
3272 GST_blacklist_test_cancel (bcc->bc);
3273 GNUNET_HELLO_address_free (bcc->na.address);
3274 GNUNET_CONTAINER_DLL_remove (bc_head,
3280 if (NULL == (n = lookup_neighbour (peer)))
3281 return GNUNET_NO; /* can't affect us */
3282 if (session != n->primary_address.session)
3284 if (session == n->alternative_address.session)
3286 if ( (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT == n->state) )
3287 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
3289 free_address (&n->alternative_address);
3291 return GNUNET_NO; /* doesn't affect us further */
3294 n->expect_latency_response = GNUNET_NO;
3295 /* The session for neighbour's primary address died */
3298 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3300 free_neighbour (n, GNUNET_NO);
3302 case GNUNET_TRANSPORT_PS_INIT_ATS:
3304 free_neighbour (n, GNUNET_NO);
3306 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3307 /* The session used to send the CONNECT terminated:
3308 * this implies a connect error*/
3309 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3310 "Failed to send CONNECT in %s with `%s' %p: session terminated\n",
3312 GST_plugins_a2s (n->primary_address.address),
3313 n->primary_address.session,
3316 /* Destroy the address since it cannot be used */
3317 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL);
3318 unset_primary_address (n);
3319 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
3320 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3322 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3323 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3324 /* error on inbound session; free neighbour entirely */
3325 free_address (&n->primary_address);
3326 free_neighbour (n, GNUNET_NO);
3328 case GNUNET_TRANSPORT_PS_CONNECTED:
3329 /* Our primary connection died, try a fast reconnect */
3330 unset_primary_address (n);
3331 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3332 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3334 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3335 /* we don't have an address, how can it go down? */
3338 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3339 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3340 "Failed to send CONNECT in %s with `%s' %p: session terminated\n",
3342 GST_plugins_a2s (n->primary_address.address),
3343 n->primary_address.session,
3346 /* Destroy the address since it cannot be used */
3347 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL);
3348 unset_primary_address (n);
3349 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3350 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3352 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3353 /* primary went down while we were waiting for CONNECT_ACK on secondary;
3354 secondary as primary */
3356 /* Destroy the inbound address since it cannot be used */
3358 == GNUNET_HELLO_address_check_option (n->primary_address.address,
3359 GNUNET_HELLO_ADDRESS_INFO_INBOUND))
3360 GNUNET_ATS_address_destroyed (GST_ats, n->primary_address.address, NULL);
3361 free_address (&n->primary_address);
3362 n->primary_address = n->alternative_address;
3363 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3364 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3365 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3367 case GNUNET_TRANSPORT_PS_DISCONNECT:
3368 free_address (&n->primary_address);
3370 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3371 /* neighbour was freed and plugins told to terminate session */
3375 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3376 "Unhandled state `%s'\n",
3377 GNUNET_TRANSPORT_ps2s (n->state));
3381 if (GNUNET_SCHEDULER_NO_TASK != n->task)
3382 GNUNET_SCHEDULER_cancel (n->task);
3383 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
3389 * We received a 'SESSION_ACK' message from the other peer.
3390 * If we sent a 'CONNECT_ACK' last, this means we are now
3391 * connected. Otherwise, do nothing.
3393 * @param message possibly a 'struct SessionConnectMessage' (check format)
3394 * @param peer identity of the peer to switch the address for
3395 * @param address address of the other peer, NULL if other peer
3397 * @param session session to use (or NULL)
3398 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3401 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
3402 const struct GNUNET_PeerIdentity *peer,
3403 const struct GNUNET_HELLO_Address *address,
3404 struct Session *session)
3406 struct NeighbourMapEntry *n;
3408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3409 "Received SESSION_ACK message from peer `%s'\n",
3411 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
3413 GNUNET_break_op (0);
3414 return GNUNET_SYSERR;
3416 GNUNET_STATISTICS_update (GST_stats,
3418 ("# SESSION_ACK messages received"),
3420 if (NULL == (n = lookup_neighbour (peer)))
3422 GNUNET_break_op (0);
3423 return GNUNET_SYSERR;
3426 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3427 "Received %s for peer `%s' in state %s/%s\n",
3430 GNUNET_TRANSPORT_ps2s (n->state),
3431 print_ack_state (n->ack_state));
3433 /* Check if we are in a plausible state for having sent
3434 a CONNECT_ACK. If not, return, otherwise break.
3436 The remote peers sends a SESSION_ACK as a response for a CONNECT_ACK
3439 We expect a SESSION_ACK:
3440 - If a remote peer has sent a CONNECT, we responded with a CONNECT_ACK and
3441 now wait for the ACK to finally be connected
3442 - If we sent a CONNECT_ACK to this peer before */
3444 if ( (GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK != n->state) &&
3445 (ACK_SEND_SESSION_ACK != n->ack_state))
3447 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3448 "Received unexpected SESSION_ACK message from peer `%s' in state %s/%s\n",
3450 GNUNET_TRANSPORT_ps2s (n->state),
3451 print_ack_state (n->ack_state));
3453 GNUNET_STATISTICS_update (GST_stats,
3454 gettext_noop ("# unexpected SESSION_ACK messages"), 1,
3459 /* We are connected */
3460 if (GNUNET_NO == GST_neighbours_test_connected(&n->id))
3462 /* Notify about connection */
3463 connect_notify_cb (callback_cls, &n->id,
3464 n->primary_address.bandwidth_in,
3465 n->primary_address.bandwidth_out);\
3467 GNUNET_STATISTICS_set (GST_stats,
3468 gettext_noop ("# peers connected"),
3469 ++neighbours_connected,
3473 if (GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT == n->state)
3475 /* We tried to switch addresses while being connect. We explicitly wait
3476 * for a CONNECT_ACK before going to GNUNET_TRANSPORT_PS_CONNECTED,
3477 * so we do not want to set the address as in use! */
3481 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3482 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3484 /* Add session to ATS since no session was given (NULL) and we may have
3485 * obtained a new session */
3486 GST_ats_add_address (n->primary_address.address, n->primary_address.session,
3489 /* Set primary address to used */
3490 set_primary_address (n,
3491 n->primary_address.address,
3492 n->primary_address.session,
3493 n->primary_address.bandwidth_in,
3494 n->primary_address.bandwidth_out,
3501 * Test if we're connected to the given peer.
3503 * @param target peer to test
3504 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
3507 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
3509 return test_connected (lookup_neighbour (target));
3513 * Change the incoming quota for the given peer.
3515 * @param neighbour identity of peer to change qutoa for
3516 * @param quota new quota
3519 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
3520 struct GNUNET_BANDWIDTH_Value32NBO quota)
3522 struct NeighbourMapEntry *n;
3524 if (NULL == (n = lookup_neighbour (neighbour)))
3526 GNUNET_STATISTICS_update (GST_stats,
3528 ("# SET QUOTA messages ignored (no such peer)"),
3532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3533 "Setting inbound quota of %u Bps for peer `%s' to all clients\n",
3534 ntohl (quota.value__), GNUNET_i2s (&n->id));
3535 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
3536 if (0 != ntohl (quota.value__))
3538 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3539 "Disconnecting peer `%4s' due to SET_QUOTA\n",
3540 GNUNET_i2s (&n->id));
3541 if (GNUNET_YES == test_connected (n))
3542 GNUNET_STATISTICS_update (GST_stats,
3543 gettext_noop ("# disconnects due to quota of 0"),
3545 disconnect_neighbour (n);
3548 void delayed_disconnect (void *cls,
3549 const struct GNUNET_SCHEDULER_TaskContext* tc)
3551 struct NeighbourMapEntry *n = cls;
3553 n->delayed_disconnect_task = GNUNET_SCHEDULER_NO_TASK;
3554 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3555 "Disconnecting by request from peer %s\n",
3556 GNUNET_i2s (&n->id));
3557 free_neighbour (n, GNUNET_NO);
3562 * We received a disconnect message from the given peer,
3563 * validate and process.
3565 * @param peer sender of the message
3566 * @param msg the disconnect message
3569 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
3570 const struct GNUNET_MessageHeader *msg)
3572 struct NeighbourMapEntry *n;
3573 const struct SessionDisconnectMessage *sdm;
3575 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3576 "Received DISCONNECT message from peer `%s'\n",
3578 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
3580 GNUNET_break_op (0);
3581 GNUNET_STATISTICS_update (GST_stats,
3583 ("# disconnect messages ignored (malformed)"), 1,
3587 GNUNET_STATISTICS_update (GST_stats,
3589 ("# DISCONNECT messages received"),
3591 sdm = (const struct SessionDisconnectMessage *) msg;
3592 if (NULL == (n = lookup_neighbour (peer)))
3593 return; /* gone already */
3594 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value_us <= n->connect_ack_timestamp.abs_value_us)
3596 GNUNET_STATISTICS_update (GST_stats,
3598 ("# disconnect messages ignored (timestamp)"), 1,
3602 if (0 != memcmp (peer, &sdm->public_key, sizeof (struct GNUNET_PeerIdentity)))
3604 GNUNET_break_op (0);
3607 if (ntohl (sdm->purpose.size) !=
3608 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
3609 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
3610 sizeof (struct GNUNET_TIME_AbsoluteNBO))
3612 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3613 "%s message from peer `%s' has invalid size \n",
3616 GNUNET_break_op (0);
3620 GNUNET_CRYPTO_eddsa_verify
3621 (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
3622 &sdm->signature, &sdm->public_key))
3624 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3625 "%s message from peer `%s' cannot be verified \n",
3628 GNUNET_break_op (0);
3631 n->delayed_disconnect_task = GNUNET_SCHEDULER_add_now (&delayed_disconnect, n);
3636 * Closure for the neighbours_iterate function.
3638 struct IteratorContext
3641 * Function to call on each connected neighbour.
3643 GST_NeighbourIterator cb;
3653 * Call the callback from the closure for each neighbour.
3655 * @param cls the `struct IteratorContext`
3656 * @param key the hash of the public key of the neighbour
3657 * @param value the `struct NeighbourMapEntry`
3658 * @return #GNUNET_OK (continue to iterate)
3661 neighbours_iterate (void *cls,
3662 const struct GNUNET_PeerIdentity *key,
3665 struct IteratorContext *ic = cls;
3666 struct NeighbourMapEntry *n = value;
3667 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
3668 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
3671 if (NULL != n->primary_address.address)
3673 bandwidth_in = n->primary_address.bandwidth_in;
3674 bandwidth_out = n->primary_address.bandwidth_out;
3678 bandwidth_in = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3679 bandwidth_out = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3683 n->primary_address.address,
3686 bandwidth_in, bandwidth_out);
3692 * Iterate over all connected neighbours.
3694 * @param cb function to call
3695 * @param cb_cls closure for cb
3698 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
3700 struct IteratorContext ic;
3702 if (NULL == neighbours)
3703 return; /* can happen during shutdown */
3706 GNUNET_CONTAINER_multipeermap_iterate (neighbours, &neighbours_iterate, &ic);
3711 * If we have an active connection to the given target, it must be shutdown.
3713 * @param target peer to disconnect from
3716 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
3718 struct NeighbourMapEntry *n;
3720 if (NULL == (n = lookup_neighbour (target)))
3721 return; /* not active */
3722 if (GNUNET_YES == test_connected (n))
3723 GNUNET_STATISTICS_update (GST_stats,
3725 ("# disconnected from peer upon explicit request"), 1,
3727 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3728 "Forced disconnect from peer %s\n",
3729 GNUNET_i2s (target));
3730 disconnect_neighbour (n);
3735 * Obtain current latency information for the given neighbour.
3737 * @param peer to get the latency for
3738 * @return observed latency of the address, FOREVER if the
3739 * the connection is not up
3741 struct GNUNET_TIME_Relative
3742 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
3744 struct NeighbourMapEntry *n;
3746 n = lookup_neighbour (peer);
3748 return GNUNET_TIME_UNIT_FOREVER_REL;
3751 case GNUNET_TRANSPORT_PS_CONNECTED:
3752 case GNUNET_TRANSPORT_PS_CONNECTED_SWITCHING_CONNECT_SENT:
3753 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3754 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3756 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3757 case GNUNET_TRANSPORT_PS_INIT_ATS:
3758 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ATS:
3759 case GNUNET_TRANSPORT_PS_CONNECT_RECV_ACK:
3760 case GNUNET_TRANSPORT_PS_CONNECT_SENT:
3761 case GNUNET_TRANSPORT_PS_DISCONNECT:
3762 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3763 return GNUNET_TIME_UNIT_FOREVER_REL;
3765 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3766 "Unhandled state `%s'\n",
3767 GNUNET_TRANSPORT_ps2s (n->state));
3771 return GNUNET_TIME_UNIT_FOREVER_REL;
3776 * Obtain current address information for the given neighbour.
3779 * @return address currently used
3781 struct GNUNET_HELLO_Address *
3782 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer)
3784 struct NeighbourMapEntry *n;
3786 n = lookup_neighbour (peer);
3789 return n->primary_address.address;
3794 * Initialize the neighbours subsystem.
3796 * @param cls closure for callbacks
3797 * @param connect_cb function to call if we connect to a peer
3798 * @param disconnect_cb function to call if we disconnect from a peer
3799 * @param peer_address_cb function to call if we change an active address
3801 * @param max_fds maximum number of fds to use
3804 GST_neighbours_start (void *cls,
3805 NotifyConnect connect_cb,
3806 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
3807 GNUNET_TRANSPORT_NeighbourChangeCallback peer_address_cb,
3808 unsigned int max_fds)
3811 connect_notify_cb = connect_cb;
3812 disconnect_notify_cb = disconnect_cb;
3813 neighbour_change_cb = peer_address_cb;
3814 neighbours = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3815 registered_quota_notifications = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3816 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
3817 utilization_transmission, NULL);
3822 * Disconnect from the given neighbour.
3825 * @param key hash of neighbour's public key (not used)
3826 * @param value the 'struct NeighbourMapEntry' of the neighbour
3827 * @return #GNUNET_OK (continue to iterate)
3830 disconnect_all_neighbours (void *cls,
3831 const struct GNUNET_PeerIdentity *key,
3834 struct NeighbourMapEntry *n = value;
3836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3837 "Disconnecting peer `%4s', %s\n",
3838 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
3839 free_neighbour (n, GNUNET_NO);
3845 * Cleanup the neighbours subsystem.
3848 GST_neighbours_stop ()
3850 struct BlacklistCheckSwitchContext *cur;
3851 struct BlacklistCheckSwitchContext *next;
3853 if (NULL == neighbours)
3855 if (GNUNET_SCHEDULER_NO_TASK != util_transmission_tk)
3857 GNUNET_SCHEDULER_cancel (util_transmission_tk);
3858 util_transmission_tk = GNUNET_SCHEDULER_NO_TASK;
3861 GNUNET_CONTAINER_multipeermap_iterate (neighbours, &disconnect_all_neighbours,
3863 GNUNET_CONTAINER_multipeermap_destroy (neighbours);
3865 next = pending_bc_head;
3866 for (cur = next; NULL != cur; cur = next )
3869 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, cur);
3871 if (NULL != cur->blc)
3873 GST_blacklist_test_cancel (cur->blc);
3876 if (NULL != cur->address)
3877 GNUNET_HELLO_address_free (cur->address);
3878 GNUNET_free_non_null (cur->ats);
3882 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
3883 &free_notification_cb, NULL);
3884 GNUNET_CONTAINER_multipeermap_destroy (registered_quota_notifications);
3885 registered_quota_notifications = NULL;
3888 callback_cls = NULL;
3889 connect_notify_cb = NULL;
3890 disconnect_notify_cb = NULL;
3891 neighbour_change_cb = NULL;
3895 /* end of file gnunet-service-transport_neighbours.c */