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3 (C) 2010-2015 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_ats.h"
29 #include "gnunet-service-transport_blacklist.h"
30 #include "gnunet-service-transport_clients.h"
31 #include "gnunet-service-transport_neighbours.h"
32 #include "gnunet-service-transport_plugins.h"
33 #include "gnunet-service-transport_validation.h"
34 #include "gnunet-service-transport.h"
35 #include "gnunet_peerinfo_service.h"
36 #include "gnunet_constants.h"
37 #include "transport.h"
42 * Size of the neighbour hash map.
44 #define NEIGHBOUR_TABLE_SIZE 256
47 * Time we give plugin to transmit DISCONNECT message before the
48 * neighbour entry self-destructs.
50 #define DISCONNECT_SENT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
53 * How often must a peer violate bandwidth quotas before we start
54 * to simply drop its messages?
56 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
59 * How long are we willing to wait for a response from ATS before timing out?
61 #define ATS_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 5000)
64 * How long are we willing to wait for an ACK from the other peer before
65 * giving up on our connect operation?
67 #define SETUP_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
70 * How long are we willing to wait for a successful reconnect if
71 * an existing connection went down? Much shorter than the
72 * usual SETUP_CONNECTION_TIMEOUT as we do not inform the
73 * higher layers about the disconnect during this period.
75 #define FAST_RECONNECT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
78 * How long are we willing to wait for a response from the blacklist
79 * subsystem before timing out?
81 #define BLACKLIST_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
84 * Interval to send utilization data
86 #define UTIL_TRANSMISSION_INTERVAL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
89 * State describing which kind a reply this neighbour should send
94 * We did not receive a SYN message for this neighbour
99 * The neighbour received a SYN message and has to send a SYN_ACK
102 ACK_SEND_SYN_ACK = 1,
105 * The neighbour sent a SYN_ACK message and has to send a ACK
112 GNUNET_NETWORK_STRUCT_BEGIN
115 * Message a peer sends to another to indicate that it intends to
116 * setup a connection/session for data exchange. A 'SESSION_SYN'
117 * should be answered with a 'SESSION_SYN_ACK' with the same body
118 * to confirm. A 'SESSION_SYN_ACK' should then be followed with
119 * a 'ACK'. Once the 'ACK' is received, both peers
120 * should be connected.
122 struct TransportSynMessage
125 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_SYN
126 * or #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_SYN_ACK
128 struct GNUNET_MessageHeader header;
133 uint32_t reserved GNUNET_PACKED;
136 * Absolute time at the sender. Only the most recent connect
137 * message implies which session is preferred by the sender.
139 struct GNUNET_TIME_AbsoluteNBO timestamp;
145 * Message a peer sends to another when connected to indicate that a
146 * session is in use and the peer is still alive or to respond to a keep alive.
147 * A peer sends a message with type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE
148 * to request a message with #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
149 * When the keep alive response with type is received, transport service
150 * will call the respective plugin to update the session timeout
152 struct SessionKeepAliveMessage
155 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE or
156 * #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE.
158 struct GNUNET_MessageHeader header;
161 * A nonce to identify the session the keep alive is used for
163 uint32_t nonce GNUNET_PACKED;
167 * Message we send to the other peer to notify him that we intentionally
168 * are disconnecting (to reduce timeouts). This is just a friendly
169 * notification, peers must not rely on always receiving disconnect
172 struct SessionDisconnectMessage
175 * Header of type #GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT
177 struct GNUNET_MessageHeader header;
182 uint32_t reserved GNUNET_PACKED;
185 * Purpose of the signature. Extends over the timestamp.
186 * Purpose should be #GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
188 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
191 * Absolute time at the sender. Only the most recent connect
192 * message implies which session is preferred by the sender.
194 struct GNUNET_TIME_AbsoluteNBO timestamp;
197 * Public key of the sender.
199 struct GNUNET_CRYPTO_EddsaPublicKey public_key;
202 * Signature of the peer that sends us the disconnect. Only
203 * valid if the timestamp is AFTER the timestamp from the
204 * corresponding 'SYN' message.
206 struct GNUNET_CRYPTO_EddsaSignature signature;
210 GNUNET_NETWORK_STRUCT_END
214 * For each neighbour we keep a list of messages
215 * that we still want to transmit to the neighbour.
221 * This is a doubly linked list.
223 struct MessageQueue *next;
226 * This is a doubly linked list.
228 struct MessageQueue *prev;
231 * Function to call once we're done.
233 GST_NeighbourSendContinuation cont;
236 * Closure for @e cont
241 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
242 * stuck together in memory. Allocated at the end of this struct.
244 const char *message_buf;
247 * Size of the message buf
249 size_t message_buf_size;
252 * At what time should we fail?
254 struct GNUNET_TIME_Absolute timeout;
260 * A possible address we could use to communicate with a neighbour.
262 struct NeighbourAddress
266 * Active session for this address.
268 struct Session *session;
271 * Network-level address information.
273 struct GNUNET_HELLO_Address *address;
276 * Timestamp of the 'SESSION_CONNECT' message we sent to the other
277 * peer for this address. Use to check that the ACK is in response
278 * to our most recent 'SYN'.
280 struct GNUNET_TIME_Absolute connect_timestamp;
283 * Inbound bandwidth from ATS for this address.
285 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
288 * Outbound bandwidth from ATS for this address.
290 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
293 * Did we tell ATS that this is our 'active' address?
298 * The current nonce sent in the last keep alive messages
300 uint32_t keep_alive_nonce;
305 * Entry in neighbours.
307 struct NeighbourMapEntry
311 * Head of list of messages we would like to send to this peer;
312 * must contain at most one message per client.
314 struct MessageQueue *messages_head;
317 * Tail of list of messages we would like to send to this peer; must
318 * contain at most one message per client.
320 struct MessageQueue *messages_tail;
323 * Are we currently trying to send a message? If so, which one?
325 struct MessageQueue *is_active;
328 * Primary address we currently use to communicate with the neighbour.
330 struct NeighbourAddress primary_address;
333 * Alternative address currently under consideration for communicating
334 * with the neighbour.
336 struct NeighbourAddress alternative_address;
339 * Identity of this neighbour.
341 struct GNUNET_PeerIdentity id;
344 * Main task that drives this peer (timeouts, keepalives, etc.).
345 * Always runs the 'master_task'.
347 struct GNUNET_SCHEDULER_Task *task;
350 * Task to disconnect neighbour after we received a DISCONNECT message
352 struct GNUNET_SCHEDULER_Task *delayed_disconnect_task;
355 * At what time should we sent the next keep-alive message?
357 struct GNUNET_TIME_Absolute keep_alive_time;
360 * At what time did we sent the last keep-alive message? Used
361 * to calculate round-trip time ("latency").
363 struct GNUNET_TIME_Absolute last_keep_alive_time;
366 * Timestamp we should include in our next SYN_ACK message.
367 * (only valid if 'send_connect_ack' is #GNUNET_YES). Used to build
368 * our SYN_ACK message.
370 struct GNUNET_TIME_Absolute connect_ack_timestamp;
373 * ATS address suggest handle
375 struct GNUNET_ATS_SuggestHandle *suggest_handle;
378 * Time where we should cut the connection (timeout) if we don't
379 * make progress in the state machine (or get a KEEPALIVE_RESPONSE
380 * if we are in S_CONNECTED).
382 struct GNUNET_TIME_Absolute timeout;
385 * Latest calculated latency value
387 struct GNUNET_TIME_Relative latency;
390 * Tracker for inbound bandwidth.
392 struct GNUNET_BANDWIDTH_Tracker in_tracker;
395 * How often has the other peer (recently) violated the inbound
396 * traffic limit? Incremented by 10 per violation, decremented by 1
397 * per non-violation (for each time interval).
399 unsigned int quota_violation_count;
402 * The current state of the peer.
404 enum GNUNET_TRANSPORT_PeerState state;
407 * Did we sent an KEEP_ALIVE message and are we expecting a response?
409 int expect_latency_response;
412 * When a peer wants to connect we have to reply to the 1st SYN message
413 * with a SYN_ACK message. But sometime we cannot send this message
414 * immediately since we do not have an address and then we have to remember
415 * to send this message as soon as we have an address.
417 * Flag to set if we still need to send a SYN_ACK message to the other peer
418 * (once we have an address to use and the peer has been allowed by our
419 * blacklist). Initially set to #ACK_UNDEFINED. Set to #ACK_SEND_SYN_ACK
420 * if we need to send a SYN_ACK. Set to #ACK_SEND_ACK if we did
421 * send a SYN_ACK and should go to 'S_CONNECTED' upon receiving a
422 * 'ACK' (regardless of what our own state machine might say).
424 enum GST_ACK_State ack_state;
427 * Tracking utilization of outbound bandwidth
429 uint32_t util_payload_bytes_sent;
432 * Tracking utilization of inbound bandwidth
434 uint32_t util_payload_bytes_recv;
437 * Tracking utilization of outbound bandwidth
439 uint32_t util_total_bytes_sent;
442 * Tracking utilization of inbound bandwidth
444 uint32_t util_total_bytes_recv;
447 * Date of last utilization transmission
449 struct GNUNET_TIME_Absolute last_util_transmission;
454 * Context for blacklist checks and the #try_connect_bl_check_cont()
455 * function. Stores information about ongoing blacklist checks.
457 struct BlackListCheckContext
461 * We keep blacklist checks in a DLL.
463 struct BlackListCheckContext *next;
466 * We keep blacklist checks in a DLL.
468 struct BlackListCheckContext *prev;
471 * Address that is being checked.
473 struct NeighbourAddress na;
476 * Handle to the ongoing blacklist check.
478 struct GST_BlacklistCheck *bc;
483 * Hash map from peer identities to the respective `struct NeighbourMapEntry`.
485 static struct GNUNET_CONTAINER_MultiPeerMap *neighbours;
488 * We keep blacklist checks in a DLL so that we can find
489 * the 'sessions' in their 'struct NeighbourAddress' if
490 * a session goes down.
492 static struct BlackListCheckContext *bc_head;
495 * We keep blacklist checks in a DLL.
497 static struct BlackListCheckContext *bc_tail;
500 * List of pending blacklist checks: head
502 static struct BlacklistCheckSwitchContext *pending_bc_head;
505 * List of pending blacklist checks: tail
507 static struct BlacklistCheckSwitchContext *pending_bc_tail;
510 * Closure for #connect_notify_cb, #disconnect_notify_cb and #neighbour_change_cb
512 static void *callback_cls;
515 * Function to call when we connected to a neighbour.
517 static NotifyConnect connect_notify_cb;
520 * Function to call when we disconnected from a neighbour.
522 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
525 * Function to call when a neighbour changed address, state or bandwidth.
527 static GNUNET_TRANSPORT_NeighbourChangeCallback neighbour_change_cb;
530 * counter for connected neighbours
532 static unsigned int neighbours_connected;
535 * Number of bytes we have currently queued for transmission.
537 static unsigned long long bytes_in_send_queue;
540 * Task transmitting utilization data
542 static struct GNUNET_SCHEDULER_Task * util_transmission_tk;
547 static struct GNUNET_CONTAINER_MultiPeerMap *registered_quota_notifications;
554 print_ack_state (enum GST_ACK_State s)
559 case ACK_SEND_SYN_ACK:
560 return "SEND_SYN_ACK";
570 * Lookup a neighbour entry in the neighbours hash map.
572 * @param pid identity of the peer to look up
573 * @return the entry, NULL if there is no existing record
575 static struct NeighbourMapEntry *
576 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
578 if (NULL == neighbours)
580 return GNUNET_CONTAINER_multipeermap_get (neighbours, pid);
585 * Test if we're connected to the given peer.
587 * @param n neighbour entry of peer to test
588 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
591 test_connected (struct NeighbourMapEntry *n)
595 return GNUNET_TRANSPORT_is_connected (n->state);
600 * Send information about a new outbound quota to our clients.
602 * @param target affected peer
603 * @param quota new quota
606 send_outbound_quota (const struct GNUNET_PeerIdentity *target,
607 struct GNUNET_BANDWIDTH_Value32NBO quota)
609 struct QuotaSetMessage q_msg;
611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
612 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
613 ntohl (quota.value__), GNUNET_i2s (target));
614 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
615 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
617 q_msg.peer = (*target);
618 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
623 * We don't need a given neighbour address any more.
624 * Release its resources and give appropriate notifications
625 * to ATS and other subsystems.
627 * @param na address we are done with; @a na itself must NOT be 'free'd, only the contents!
630 free_address (struct NeighbourAddress *na)
632 if (GNUNET_YES == na->ats_active)
634 GST_validation_set_address_use (na->address, na->session, GNUNET_NO);
635 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_NO);
638 na->bandwidth_in = GNUNET_BANDWIDTH_value_init (0);
639 na->bandwidth_out = GNUNET_BANDWIDTH_value_init (0);
640 na->ats_active = GNUNET_NO;
641 na->keep_alive_nonce = 0;
642 if (NULL != na->address)
644 GNUNET_HELLO_address_free (na->address);
652 * Set net state for this neighbour and notify monitoring
654 * @param n the respective neighbour
655 * @param s the new state
658 set_state (struct NeighbourMapEntry *n, enum GNUNET_TRANSPORT_PeerState s)
661 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s\n",
663 GNUNET_TRANSPORT_ps2s(s));
664 neighbour_change_cb (callback_cls,
666 n->primary_address.address,
667 n->state, n->timeout,
668 n->primary_address.bandwidth_in,
669 n->primary_address.bandwidth_out);
674 * Set net state and state timeout for this neighbour and notify monitoring
676 * @param n the respective neighbour
677 * @param s the new state
678 * @param timeout the new timeout
681 set_state_and_timeout (struct NeighbourMapEntry *n,
682 enum GNUNET_TRANSPORT_PeerState s,
683 struct GNUNET_TIME_Absolute timeout)
686 n->timeout = timeout;
687 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Neighbour `%s' changed state to %s with timeout %s\n",
689 GNUNET_TRANSPORT_ps2s(s),
690 GNUNET_STRINGS_absolute_time_to_string (timeout));
691 neighbour_change_cb (callback_cls,
693 n->primary_address.address,
694 n->state, n->timeout,
695 n->primary_address.bandwidth_in,
696 n->primary_address.bandwidth_out);
701 * Set new state timeout for this neighbour and notify monitoring
703 * @param n the respective neighbour
704 * @param timeout the new timeout
707 set_timeout (struct NeighbourMapEntry *n,
708 struct GNUNET_TIME_Absolute timeout)
710 n->timeout = timeout;
711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
712 "Neighbour `%s' changed timeout %s\n",
714 GNUNET_STRINGS_absolute_time_to_string (timeout));
715 neighbour_change_cb (callback_cls,
717 n->primary_address.address,
718 n->state, n->timeout,
719 n->primary_address.bandwidth_in,
720 n->primary_address.bandwidth_out);
725 * Initialize the alternative address of a neighbour
727 * @param n the neighbour
728 * @param address address of the other peer, NULL if other peer
730 * @param session session to use (or NULL, in which case an
731 * address must be setup)
732 * @param bandwidth_in inbound quota to be used when connection is up
733 * @param bandwidth_out outbound quota to be used when connection is up
736 set_alternative_address (struct NeighbourMapEntry *n,
737 const struct GNUNET_HELLO_Address *address,
738 struct Session *session,
739 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
740 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
742 struct GNUNET_TRANSPORT_PluginFunctions *papi;
744 if (NULL == (papi = GST_plugins_find (address->transport_name)))
749 if (session == n->alternative_address.session)
751 n->alternative_address.bandwidth_in = bandwidth_in;
752 n->alternative_address.bandwidth_out = bandwidth_out;
755 free_address (&n->alternative_address);
757 session = papi->get_session (papi->cls, address);
760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
761 "Failed to obtain new session for peer `%s' and address '%s'\n",
762 GNUNET_i2s (&address->peer),
763 GST_plugins_a2s (address));
764 GNUNET_STATISTICS_update (GST_stats,
765 gettext_noop ("# session creation failed"),
770 GST_ats_new_session (address, session);
771 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
772 "Neighbour `%s' configured alternative address %s\n",
774 GST_plugins_a2s(address));
776 n->alternative_address.address = GNUNET_HELLO_address_copy (address);
777 n->alternative_address.bandwidth_in = bandwidth_in;
778 n->alternative_address.bandwidth_out = bandwidth_out;
779 n->alternative_address.session = session;
780 n->alternative_address.ats_active = GNUNET_NO;
781 n->alternative_address.keep_alive_nonce = 0;
786 * Initialize the primary address of a neighbour
788 * @param n the neighbour
789 * @param address address of the other peer, NULL if other peer
791 * @param session session to use (or NULL, in which case an
792 * address must be setup)
793 * @param bandwidth_in inbound quota to be used when connection is up
794 * @param bandwidth_out outbound quota to be used when connection is up
795 * @param is_active #GNUNET_YES to mark this as the active address with ATS
798 set_primary_address (struct NeighbourMapEntry *n,
799 const struct GNUNET_HELLO_Address *address,
800 struct Session *session,
801 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
802 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
805 struct GNUNET_TRANSPORT_PluginFunctions *papi;
807 if (NULL == (papi = GST_plugins_find (address->transport_name)))
812 if (session == n->primary_address.session)
814 n->primary_address.bandwidth_in = bandwidth_in;
815 n->primary_address.bandwidth_out = bandwidth_out;
816 if (is_active != n->primary_address.ats_active)
818 n->primary_address.ats_active = is_active;
819 GNUNET_ATS_address_in_use (GST_ats,
820 n->primary_address.address,
821 n->primary_address.session,
823 GST_validation_set_address_use (n->primary_address.address,
824 n->primary_address.session,
827 if (GNUNET_YES == is_active)
829 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
830 send_outbound_quota (&address->peer, bandwidth_out);
834 free_address (&n->primary_address);
836 session = papi->get_session (papi->cls, address);
839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
840 "Failed to obtain new session for peer `%s' and address '%s'\n",
841 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
842 GNUNET_STATISTICS_update (GST_stats,
843 gettext_noop ("# session creation failed"),
848 GST_ats_new_session (address, session);
849 n->primary_address.address = GNUNET_HELLO_address_copy (address);
850 n->primary_address.bandwidth_in = bandwidth_in;
851 n->primary_address.bandwidth_out = bandwidth_out;
852 n->primary_address.session = session;
853 n->primary_address.ats_active = is_active;
854 n->primary_address.keep_alive_nonce = 0;
855 if (GNUNET_YES == is_active)
857 /* Telling ATS about new session */
858 GNUNET_ATS_address_in_use (GST_ats,
859 n->primary_address.address,
860 n->primary_address.session,
862 GST_validation_set_address_use (n->primary_address.address,
863 n->primary_address.session,
865 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
866 send_outbound_quota (&address->peer, bandwidth_out);
869 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
870 "Neighbour `%s' switched to address `%s'\n",
872 GST_plugins_a2s(address));
874 neighbour_change_cb (callback_cls,
876 n->primary_address.address,
877 n->state, n->timeout,
878 n->primary_address.bandwidth_in,
879 n->primary_address.bandwidth_out);
884 * Clear the primary address of a neighbour since this address is not
885 * valid anymore and notify monitoring about it
887 * @param n the neighbour
890 unset_primary_address (struct NeighbourMapEntry *n)
892 /* Unset primary address */
893 free_address (&n->primary_address);
895 /* Notify monitoring about it */
896 neighbour_change_cb (callback_cls,
899 n->state, n->timeout,
900 n->primary_address.bandwidth_in,
901 n->primary_address.bandwidth_out);
906 * Clear the alternative address of a neighbour since this address is not
909 * @param n the neighbour
912 unset_alternative_address (struct NeighbourMapEntry *n)
914 /* Unset primary address */
915 free_address (&n->alternative_address);
920 * Free a neighbour map entry.
922 * @param n entry to free
923 * @param keep_sessions #GNUNET_NO to tell plugin to terminate sessions,
924 * #GNUNET_YES to keep all sessions
927 free_neighbour (struct NeighbourMapEntry *n,
930 struct MessageQueue *mq;
931 struct GNUNET_TRANSPORT_PluginFunctions *papi;
932 struct GNUNET_HELLO_Address *backup_primary;
934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
935 "Freeing neighbour state of peer `%s'\n",
936 GNUNET_i2s (&n->id));
937 n->is_active = NULL; /* always free'd by its own continuation! */
939 /* fail messages currently in the queue */
940 while (NULL != (mq = n->messages_head))
942 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
943 if (NULL != mq->cont)
944 mq->cont (mq->cont_cls, GNUNET_SYSERR, mq->message_buf_size, 0);
947 /* It is too late to send other peer disconnect notifications, but at
948 least internally we need to get clean... */
949 if (GNUNET_YES == test_connected (n))
951 GNUNET_STATISTICS_set (GST_stats,
952 gettext_noop ("# peers connected"),
953 --neighbours_connected,
955 disconnect_notify_cb (callback_cls, &n->id);
958 /* Mark peer as disconnected */
959 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED);
961 if (NULL != n->primary_address.address)
962 backup_primary = GNUNET_HELLO_address_copy (n->primary_address.address);
964 backup_primary = NULL;
966 /* free addresses and mark as unused */
967 unset_primary_address (n);
968 free_address (&n->alternative_address);
970 /* cut all transport-level connection for this peer */
971 // FIXME: might want to revisit this; maybe just
972 // shorten session timeout on plugin level?
973 if ((GNUNET_NO == keep_sessions) &&
974 (NULL != backup_primary) &&
975 (NULL != (papi = GST_plugins_find (backup_primary->transport_name))))
976 papi->disconnect_peer (papi->cls, &n->id);
978 if (NULL != backup_primary)
979 GNUNET_HELLO_address_free (backup_primary);
980 GNUNET_assert (GNUNET_YES ==
981 GNUNET_CONTAINER_multipeermap_remove (neighbours,
984 /* Cancel address requests for this peer */
985 if (NULL != n->suggest_handle)
987 GNUNET_ATS_suggest_address_cancel (GST_ats, &n->id);
988 n->suggest_handle = NULL;
991 /* Cancel the disconnect task */
992 if (NULL != n->delayed_disconnect_task)
994 GNUNET_SCHEDULER_cancel (n->delayed_disconnect_task);
995 n->delayed_disconnect_task = NULL;
998 /* Cancel the master task */
1001 GNUNET_SCHEDULER_cancel (n->task);
1004 /* free rest of memory */
1010 * Transmit a message using the current session of the given
1013 * @param n entry for the recipient
1014 * @param msgbuf buffer to transmit
1015 * @param msgbuf_size number of bytes in @a msgbuf buffer
1016 * @param priority transmission priority
1017 * @param timeout transmission timeout
1018 * @param use_keepalive_timeout #GNUNET_YES to use plugin-specific keep-alive
1019 * timeout (@a timeout is ignored in that case), #GNUNET_NO otherwise
1020 * @param cont continuation to call when finished (can be NULL)
1021 * @param cont_cls closure for @a cont
1022 * @return timeout (copy of @a timeout or a calculated one if
1023 * @a use_keepalive_timeout is #GNUNET_YES.
1025 static struct GNUNET_TIME_Relative
1026 send_with_session (struct NeighbourMapEntry *n,
1027 const char *msgbuf, size_t msgbuf_size,
1029 struct GNUNET_TIME_Relative timeout,
1030 unsigned int use_keepalive_timeout,
1031 GNUNET_TRANSPORT_TransmitContinuation cont,
1034 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1035 struct GNUNET_TIME_Relative result = GNUNET_TIME_UNIT_FOREVER_REL;
1037 GNUNET_assert (n->primary_address.session != NULL);
1038 if ( ((NULL == (papi = GST_plugins_find (n->primary_address.address->transport_name)) ||
1039 (-1 == papi->send (papi->cls,
1040 n->primary_address.session,
1041 msgbuf, msgbuf_size,
1043 (result = (GNUNET_NO == use_keepalive_timeout) ? timeout :
1044 GNUNET_TIME_relative_divide (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1045 papi->query_keepalive_factor (papi->cls))),
1046 cont, cont_cls)))) &&
1048 cont (cont_cls, &n->id, GNUNET_SYSERR, msgbuf_size, 0);
1049 GST_neighbours_notify_data_sent (&n->id,
1050 n->primary_address.address, n->primary_address.session, msgbuf_size);
1051 GNUNET_break (NULL != papi);
1057 * Master task run for every neighbour. Performs all of the time-related
1058 * activities (keep alive, send next message, disconnect if idle, finish
1059 * clean up after disconnect).
1061 * @param cls the `struct NeighbourMapEntry` for which we are running
1062 * @param tc scheduler context (unused)
1065 master_task (void *cls,
1066 const struct GNUNET_SCHEDULER_TaskContext *tc);
1070 * Function called when the 'DISCONNECT' message has been sent by the
1071 * plugin. Frees the neighbour --- if the entry still exists.
1074 * @param target identity of the neighbour that was disconnected
1075 * @param result #GNUNET_OK if the disconnect got out successfully
1076 * @param payload bytes payload
1077 * @param physical bytes physical
1080 send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
1081 int result, size_t payload, size_t physical)
1083 struct NeighbourMapEntry *n;
1085 n = lookup_neighbour (target);
1087 return; /* already gone */
1088 if (GNUNET_TRANSPORT_PS_DISCONNECT != n->state)
1089 return; /* have created a fresh entry since */
1090 if (NULL != n->task)
1091 GNUNET_SCHEDULER_cancel (n->task);
1092 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1097 * Transmit a DISCONNECT message to the other peer.
1099 * @param n neighbour to send DISCONNECT message.
1102 send_disconnect (struct NeighbourMapEntry *n)
1104 struct SessionDisconnectMessage disconnect_msg;
1106 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1107 "Sending DISCONNECT message to peer `%4s'\n",
1108 GNUNET_i2s (&n->id));
1109 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
1110 disconnect_msg.header.type =
1111 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1112 disconnect_msg.reserved = htonl (0);
1113 disconnect_msg.purpose.size =
1114 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
1115 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
1116 sizeof (struct GNUNET_TIME_AbsoluteNBO));
1117 disconnect_msg.purpose.purpose =
1118 htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1119 disconnect_msg.timestamp =
1120 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1121 disconnect_msg.public_key = GST_my_identity.public_key;
1122 GNUNET_assert (GNUNET_OK ==
1123 GNUNET_CRYPTO_eddsa_sign (GST_my_private_key,
1124 &disconnect_msg.purpose,
1125 &disconnect_msg.signature));
1127 (void) send_with_session (n, (const char *) &disconnect_msg,
1128 sizeof (disconnect_msg), UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1129 GNUNET_NO, &send_disconnect_cont, NULL );
1130 GNUNET_STATISTICS_update (GST_stats,
1132 ("# DISCONNECT messages sent"), 1,
1138 * Disconnect from the given neighbour, clean up the record.
1140 * @param n neighbour to disconnect from
1143 disconnect_neighbour (struct NeighbourMapEntry *n)
1145 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1146 "Disconnecting from peer %s in state %s\n",
1147 GNUNET_i2s (&n->id),
1148 GNUNET_TRANSPORT_ps2s (n->state));
1149 /* depending on state, notify neighbour and/or upper layers of this peer
1153 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
1154 case GNUNET_TRANSPORT_PS_INIT_ATS:
1155 /* other peer is completely unaware of us, no need to send DISCONNECT */
1156 free_neighbour (n, GNUNET_NO);
1158 case GNUNET_TRANSPORT_PS_SYN_SENT:
1159 send_disconnect (n);
1160 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1162 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
1163 /* we never ACK'ed the other peer's request, no need to send DISCONNECT */
1164 free_neighbour (n, GNUNET_NO);
1166 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
1167 /* we DID ACK the other peer's request, must send DISCONNECT */
1168 send_disconnect (n);
1169 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1171 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
1172 case GNUNET_TRANSPORT_PS_CONNECTED:
1173 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1174 /* we are currently connected, need to send disconnect and do
1175 internal notifications and update statistics */
1176 send_disconnect (n);
1177 GNUNET_STATISTICS_set (GST_stats,
1178 gettext_noop ("# peers connected"),
1179 --neighbours_connected,
1181 disconnect_notify_cb (callback_cls, &n->id);
1182 set_state (n, GNUNET_TRANSPORT_PS_DISCONNECT);
1184 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
1185 /* Disconnecting while waiting for an ATS address to reconnect,
1186 * cannot send DISCONNECT */
1187 free_neighbour (n, GNUNET_NO);
1189 case GNUNET_TRANSPORT_PS_DISCONNECT:
1190 /* already disconnected, ignore */
1192 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
1193 /* already cleaned up, how did we get here!? */
1197 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1198 "Unhandled state `%s'\n",
1199 GNUNET_TRANSPORT_ps2s (n->state));
1203 /* schedule timeout to clean up */
1204 if (NULL != n->task)
1205 GNUNET_SCHEDULER_cancel (n->task);
1206 n->task = GNUNET_SCHEDULER_add_delayed (DISCONNECT_SENT_TIMEOUT,
1212 * We're done with our transmission attempt, continue processing.
1214 * @param cls the `struct MessageQueue` of the message
1215 * @param receiver intended receiver
1216 * @param success whether it worked or not
1217 * @param size_payload bytes payload sent
1218 * @param physical bytes sent on wire
1221 transmit_send_continuation (void *cls,
1222 const struct GNUNET_PeerIdentity *receiver,
1223 int success, size_t size_payload, size_t physical)
1225 struct MessageQueue *mq = cls;
1226 struct NeighbourMapEntry *n;
1228 if (NULL == (n = lookup_neighbour (receiver)))
1231 return; /* disconnect or other error while transmitting, can happen */
1233 if (n->is_active == mq)
1235 /* this is still "our" neighbour, remove us from its queue
1236 and allow it to send the next message now */
1237 n->is_active = NULL;
1238 if (NULL != n->task)
1239 GNUNET_SCHEDULER_cancel (n->task);
1240 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1242 if (bytes_in_send_queue < mq->message_buf_size)
1244 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1245 "Bytes_in_send_queue `%u', Message_size %u, result: %s, payload %u, on wire %u\n",
1246 bytes_in_send_queue, mq->message_buf_size,
1247 (GNUNET_OK == success) ? "OK" : "FAIL",
1248 size_payload, physical);
1253 GNUNET_break (size_payload == mq->message_buf_size);
1254 bytes_in_send_queue -= mq->message_buf_size;
1255 GNUNET_STATISTICS_set (GST_stats,
1257 ("# bytes in message queue for other peers"),
1258 bytes_in_send_queue, GNUNET_NO);
1259 if (GNUNET_OK == success)
1260 GNUNET_STATISTICS_update (GST_stats,
1262 ("# messages transmitted to other peers"),
1265 GNUNET_STATISTICS_update (GST_stats,
1267 ("# transmission failures for messages to other peers"),
1269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1270 "Sending message to `%s' of type %u with %u bytes was a %s\n",
1271 GNUNET_i2s (receiver),
1272 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
1273 mq->message_buf_size,
1274 (success == GNUNET_OK) ? "success" : "FAILURE");
1275 if (NULL != mq->cont)
1276 mq->cont (mq->cont_cls, success, size_payload, physical);
1282 * Check the message list for the given neighbour and if we can
1283 * send a message, do so. This function should only be called
1284 * if the connection is at least generally ready for transmission.
1285 * While we will only send one message at a time, no bandwidth
1286 * quota management is performed here. If a message was given to
1287 * the plugin, the continuation will automatically re-schedule
1288 * the 'master' task once the next message might be transmitted.
1290 * @param n target peer for which to transmit
1293 try_transmission_to_peer (struct NeighbourMapEntry *n)
1295 struct MessageQueue *mq;
1296 struct GNUNET_TIME_Relative timeout;
1298 if (NULL == n->primary_address.address)
1300 /* no address, why are we here? */
1304 if ((0 == n->primary_address.address->address_length) &&
1305 (NULL == n->primary_address.session))
1307 /* no address, why are we here? */
1311 if (NULL != n->is_active)
1313 /* transmission already pending */
1317 /* timeout messages from the queue that are past their due date */
1318 while (NULL != (mq = n->messages_head))
1320 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1321 if (timeout.rel_value_us > 0)
1323 GNUNET_STATISTICS_update (GST_stats,
1325 ("# messages timed out while in transport queue"),
1327 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1329 transmit_send_continuation (mq, &n->id,
1331 mq->message_buf_size, 0); /* timeout */
1334 return; /* no more messages */
1335 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1339 "Giving message with %u bytes to plugin session %p\n",
1340 mq->message_buf_size, n->primary_address.session);
1342 (void) send_with_session (n,
1343 mq->message_buf, mq->message_buf_size,
1344 0 /* priority */, timeout, GNUNET_NO,
1345 &transmit_send_continuation, mq);
1350 * Send keepalive message to the neighbour. Must only be called
1351 * if we are on 'connected' state or while trying to switch addresses.
1352 * Will internally determine if a keepalive is truly needed (so can
1353 * always be called).
1355 * @param n neighbour that went idle and needs a keepalive
1358 send_keepalive (struct NeighbourMapEntry *n)
1360 struct SessionKeepAliveMessage m;
1361 struct GNUNET_TIME_Relative timeout;
1364 GNUNET_assert ((GNUNET_TRANSPORT_PS_CONNECTED == n->state) ||
1365 (GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT));
1366 if (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time).rel_value_us > 0)
1367 return; /* no keepalive needed at this time */
1369 nonce = 0; /* 0 indicates 'not set' */
1371 nonce = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE, UINT32_MAX);
1373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1374 "Sending keep alive to peer `%s' with nonce %u\n",
1375 GNUNET_i2s (&n->id), nonce);
1377 m.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1378 m.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
1379 m.nonce = htonl (nonce);
1381 timeout = send_with_session (n,
1382 (const void *) &m, sizeof (m),
1383 UINT32_MAX /* priority */,
1384 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1386 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
1388 n->primary_address.keep_alive_nonce = nonce;
1389 n->expect_latency_response = GNUNET_YES;
1390 n->last_keep_alive_time = GNUNET_TIME_absolute_get ();
1391 n->keep_alive_time = GNUNET_TIME_relative_to_absolute (timeout);
1397 * Keep the connection to the given neighbour alive longer,
1398 * we received a KEEPALIVE (or equivalent); send a response.
1400 * @param neighbour neighbour to keep alive (by sending keep alive response)
1401 * @param m the keep alive message containing the nonce to respond to
1404 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour,
1405 const struct GNUNET_MessageHeader *m)
1407 struct NeighbourMapEntry *n;
1408 const struct SessionKeepAliveMessage *msg_in;
1409 struct SessionKeepAliveMessage msg;
1411 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1414 msg_in = (struct SessionKeepAliveMessage *) m;
1415 if (NULL == (n = lookup_neighbour (neighbour)))
1417 GNUNET_STATISTICS_update (GST_stats,
1419 ("# KEEPALIVE messages discarded (peer unknown)"),
1423 if (NULL == n->primary_address.session)
1425 GNUNET_STATISTICS_update (GST_stats,
1427 ("# KEEPALIVE messages discarded (no session)"),
1432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1433 "Received keep alive request from peer `%s' with nonce %u\n",
1434 GNUNET_i2s (&n->id), ntohl (msg_in->nonce));
1436 /* send reply to allow neighbour to measure latency */
1437 msg.header.size = htons (sizeof (struct SessionKeepAliveMessage));
1438 msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE);
1439 msg.nonce = msg_in->nonce;
1440 (void) send_with_session(n,
1441 (const void *) &msg, sizeof (struct SessionKeepAliveMessage),
1442 UINT32_MAX /* priority */,
1443 GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_YES,
1449 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
1450 * latency to this peer. Pass the updated information (existing ats
1451 * plus calculated latency) to ATS.
1453 * @param neighbour neighbour to keep alive
1454 * @param m the message containing the keep alive response
1457 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour,
1458 const struct GNUNET_MessageHeader *m)
1460 struct NeighbourMapEntry *n;
1461 const struct SessionKeepAliveMessage *msg;
1462 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1464 struct GNUNET_ATS_Information ats;
1466 if (sizeof (struct SessionKeepAliveMessage) != ntohs (m->size))
1469 msg = (const struct SessionKeepAliveMessage *) m;
1470 if (NULL == (n = lookup_neighbour (neighbour)))
1472 GNUNET_STATISTICS_update (GST_stats,
1474 ("# KEEPALIVE_RESPONSE messages discarded (not connected)"),
1478 if ( (GNUNET_TRANSPORT_PS_CONNECTED != n->state) ||
1479 (GNUNET_YES != n->expect_latency_response) )
1481 GNUNET_STATISTICS_update (GST_stats,
1483 ("# KEEPALIVE_RESPONSE messages discarded (not expected)"),
1487 if (NULL == n->primary_address.address)
1489 GNUNET_STATISTICS_update (GST_stats,
1491 ("# KEEPALIVE_RESPONSE messages discarded (address changed)"),
1495 if (n->primary_address.keep_alive_nonce != ntohl (msg->nonce))
1497 GNUNET_STATISTICS_update (GST_stats,
1499 ("# KEEPALIVE_RESPONSE messages discarded (wrong nonce)"),
1505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1506 "Received keep alive response from peer `%s' for session %p\n",
1507 GNUNET_i2s (&n->id), n->primary_address.session);
1511 /* Update session timeout here */
1512 if (NULL != (papi = GST_plugins_find (n->primary_address.address->transport_name)))
1514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1515 "Updating session for peer `%s' for session %p\n",
1516 GNUNET_i2s (&n->id), n->primary_address.session);
1517 papi->update_session_timeout (papi->cls, &n->id, n->primary_address.session);
1524 n->primary_address.keep_alive_nonce = 0;
1525 n->expect_latency_response = GNUNET_NO;
1526 n->latency = GNUNET_TIME_absolute_get_duration (n->last_keep_alive_time);
1527 set_timeout (n, GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
1529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1530 "Latency for peer `%s' is %s\n",
1531 GNUNET_i2s (&n->id),
1532 GNUNET_STRINGS_relative_time_to_string (n->latency,
1534 /* append latency */
1535 ats.type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
1536 if (n->latency.rel_value_us > UINT32_MAX)
1537 latency = UINT32_MAX;
1539 latency = n->latency.rel_value_us;
1540 ats.value = htonl (latency);
1541 GST_ats_update_metrics (n->primary_address.address,
1542 n->primary_address.session,
1548 * We have received a message from the given sender. How long should
1549 * we delay before receiving more? (Also used to keep the peer marked
1552 * @param sender sender of the message
1553 * @param size size of the message
1554 * @param do_forward set to #GNUNET_YES if the message should be forwarded to clients
1555 * #GNUNET_NO if the neighbour is not connected or violates the quota,
1556 * #GNUNET_SYSERR if the connection is not fully up yet
1557 * @return how long to wait before reading more from this sender
1559 struct GNUNET_TIME_Relative
1560 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1561 *sender, ssize_t size, int *do_forward)
1563 struct NeighbourMapEntry *n;
1564 struct GNUNET_TIME_Relative ret;
1566 if (NULL == neighbours)
1568 *do_forward = GNUNET_NO;
1569 return GNUNET_TIME_UNIT_FOREVER_REL; /* This can happen during shutdown */
1571 if (NULL == (n = lookup_neighbour (sender)))
1573 GST_neighbours_try_connect (sender);
1574 if (NULL == (n = lookup_neighbour (sender)))
1576 GNUNET_STATISTICS_update (GST_stats,
1578 ("# messages discarded due to lack of neighbour record"),
1580 *do_forward = GNUNET_NO;
1581 return GNUNET_TIME_UNIT_ZERO;
1584 if (! test_connected (n))
1586 *do_forward = GNUNET_SYSERR;
1587 return GNUNET_TIME_UNIT_ZERO;
1589 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1591 n->quota_violation_count++;
1592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1593 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1594 n->in_tracker.available_bytes_per_s__,
1595 n->quota_violation_count);
1596 /* Discount 32k per violation */
1597 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1601 if (n->quota_violation_count > 0)
1603 /* try to add 32k back */
1604 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1605 n->quota_violation_count--;
1608 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1610 GNUNET_STATISTICS_update (GST_stats,
1612 ("# bandwidth quota violations by other peers"),
1614 *do_forward = GNUNET_NO;
1615 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1617 *do_forward = GNUNET_YES;
1618 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1619 if (ret.rel_value_us > 0)
1621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1622 "Throttling read (%llu bytes excess at %u b/s), waiting %s before reading more.\n",
1623 (unsigned long long) n->in_tracker.
1624 consumption_since_last_update__,
1625 (unsigned int) n->in_tracker.available_bytes_per_s__,
1626 GNUNET_STRINGS_relative_time_to_string (ret, GNUNET_YES));
1627 GNUNET_STATISTICS_update (GST_stats,
1628 gettext_noop ("# ms throttling suggested"),
1629 (int64_t) ret.rel_value_us / 1000LL,
1637 * Transmit a message to the given target using the active connection.
1639 * @param target destination
1640 * @param msg message to send
1641 * @param msg_size number of bytes in msg
1642 * @param timeout when to fail with timeout
1643 * @param cont function to call when done
1644 * @param cont_cls closure for 'cont'
1647 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1648 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1649 GST_NeighbourSendContinuation cont, void *cont_cls)
1651 struct NeighbourMapEntry *n;
1652 struct MessageQueue *mq;
1654 /* All ove these cases should never happen; they are all API violations.
1655 But we check anyway, just to be sure. */
1656 if (NULL == (n = lookup_neighbour (target)))
1660 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1663 if (GNUNET_YES != test_connected (n))
1667 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1670 bytes_in_send_queue += msg_size;
1671 GNUNET_STATISTICS_set (GST_stats,
1673 ("# bytes in message queue for other peers"),
1674 bytes_in_send_queue, GNUNET_NO);
1675 mq = GNUNET_malloc (sizeof (struct MessageQueue) + msg_size);
1677 mq->cont_cls = cont_cls;
1678 memcpy (&mq[1], msg, msg_size);
1679 mq->message_buf = (const char *) &mq[1];
1680 mq->message_buf_size = msg_size;
1681 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Enqueueing %u bytes to send to peer %s\n",
1684 msg_size, GNUNET_i2s (target));
1686 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1687 if (NULL != n->task)
1688 GNUNET_SCHEDULER_cancel (n->task);
1689 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1694 send_session_connect_cont (void *cls,
1695 const struct GNUNET_PeerIdentity *target,
1697 size_t size_payload,
1698 size_t size_on_wire)
1700 struct NeighbourMapEntry *n;
1702 n = lookup_neighbour (target);
1705 /* SYN continuation was called after neighbor was freed,
1706 * for example due to a time out for the state or the session
1707 * used was already terminated: nothing to do here... */
1711 if ( (GNUNET_TRANSPORT_PS_SYN_SENT != n->state) &&
1712 (GNUNET_TRANSPORT_PS_RECONNECT_SENT != n->state) &&
1713 (GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT != n->state))
1715 /* SYN continuation was called after neighbor changed state,
1716 * for example due to a time out for the state or the session
1717 * used was already terminated: nothing to do here... */
1720 if (GNUNET_OK == result)
1723 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1724 _("Failed to send SYN message to peer `%s' using address `%s' session %p\n"),
1725 GNUNET_i2s (target),
1726 GST_plugins_a2s (n->primary_address.address),
1727 n->primary_address.session);
1730 case GNUNET_TRANSPORT_PS_SYN_SENT:
1731 /* Remove address and request and additional one */
1732 unset_primary_address (n);
1733 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1734 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
1736 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1737 /* Remove address and request and additional one */
1738 unset_primary_address (n);
1739 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
1740 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1742 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
1743 /* Remove address and request and go back to primary address */
1744 GNUNET_STATISTICS_update (GST_stats, gettext_noop
1745 ("# Failed attempts to switch addresses (failed to send SYN CONT)"), 1, GNUNET_NO);
1746 unset_alternative_address (n);
1747 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
1748 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1751 disconnect_neighbour (n);
1757 * Send a SYN message via the given address.
1759 * @param na address to use
1762 send_syn (struct NeighbourAddress *na)
1764 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1765 struct TransportSynMessage connect_msg;
1766 struct NeighbourMapEntry *n;
1768 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1769 "Sending SYN message to peer `%s'\n",
1770 GNUNET_i2s (&na->address->peer));
1772 if (NULL == (papi = GST_plugins_find (na->address->transport_name)))
1777 if (NULL == na->session)
1778 na->session = papi->get_session (papi->cls, na->address);
1779 if (NULL == na->session)
1784 GST_ats_new_session (na->address,
1786 GNUNET_STATISTICS_update (GST_stats,
1788 ("# SYN messages sent"),
1790 na->connect_timestamp = GNUNET_TIME_absolute_get ();
1791 connect_msg.header.size = htons (sizeof (struct TransportSynMessage));
1792 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_SYN);
1793 connect_msg.reserved = htonl (0);
1794 connect_msg.timestamp = GNUNET_TIME_absolute_hton (na->connect_timestamp);
1796 papi->send (papi->cls,
1798 (const char *) &connect_msg, sizeof (struct TransportSynMessage),
1800 SETUP_CONNECTION_TIMEOUT,
1801 send_session_connect_cont, NULL))
1803 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1804 _("Failed to transmit SYN message via plugin to %s\n"),
1805 GST_plugins_a2s (na->address));
1807 n = lookup_neighbour (&na->address->peer);
1815 case GNUNET_TRANSPORT_PS_SYN_SENT:
1816 /* Remove address and request and additional one */
1817 unset_primary_address (n);
1818 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
1819 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
1820 /* Hard failure to send the SYN message with this address:
1821 Destroy address and session */
1823 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
1824 /* Remove address and request and additional one */
1825 unset_primary_address (n);
1826 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
1827 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1829 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
1830 GNUNET_STATISTICS_update (GST_stats, gettext_noop
1831 ("# Failed attempts to switch addresses (failed to send SYN)"), 1, GNUNET_NO);
1832 /* Remove address and request and additional one */
1833 unset_alternative_address (n);
1834 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
1835 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1838 disconnect_neighbour (n);
1842 GST_neighbours_notify_data_sent (&na->address->peer,
1845 sizeof (struct TransportSynMessage));
1850 send_session_connect_ack_cont (void *cls,
1851 const struct GNUNET_PeerIdentity *target,
1853 size_t size_payload,
1854 size_t size_on_wire)
1856 struct NeighbourMapEntry *n;
1858 n = lookup_neighbour (target);
1861 /* SYN_ACK continuation was called after neighbor was freed,
1862 * for example due to a time out for the state or the session
1863 * used was already terminated: nothing to do here... */
1867 if (GNUNET_TRANSPORT_PS_SYN_RECV_ACK != n->state)
1869 /* SYN_ACK continuation was called after neighbor changed state,
1870 * for example due to a time out for the state or the session
1871 * used was already terminated: nothing to do here... */
1874 if (GNUNET_OK == result)
1877 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1878 _("Failed to send SYN_ACK message to peer `%s' using address `%s' session %p\n"),
1879 GNUNET_i2s (target),
1880 GST_plugins_a2s (n->primary_address.address),
1881 n->primary_address.session);
1883 /* Remove address and request and additional one */
1884 unset_primary_address (n);
1885 n->ack_state = ACK_SEND_SYN_ACK;
1886 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ATS,
1887 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1893 * Send a SYN_ACK message via the given address.
1895 * @param address address to use
1896 * @param session session to use
1897 * @param timestamp timestamp to use for the ACK message
1898 * @return GNUNET_SYSERR if sending immediately failed, GNUNET_OK otherwise
1901 send_connect_ack_message (const struct GNUNET_HELLO_Address *address,
1902 struct Session *session,
1903 struct GNUNET_TIME_Absolute timestamp)
1905 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1906 struct TransportSynMessage connect_msg;
1907 struct NeighbourMapEntry *n;
1909 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1910 "Sending SYN_ACK to peer `%s'\n",
1911 GNUNET_i2s (&address->peer));
1913 if (NULL == (papi = GST_plugins_find (address->transport_name)))
1918 if (NULL == session)
1919 session = papi->get_session (papi->cls, address);
1920 if (NULL == session)
1925 GST_ats_new_session (address, session);
1926 GNUNET_STATISTICS_update (GST_stats,
1928 ("# SYN_ACK messages sent"),
1930 connect_msg.header.size = htons (sizeof (struct TransportSynMessage));
1931 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_SYN_ACK);
1932 connect_msg.reserved = htonl (0);
1933 connect_msg.timestamp = GNUNET_TIME_absolute_hton (timestamp);
1935 if (GNUNET_SYSERR == papi->send (papi->cls,
1937 (const char *) &connect_msg, sizeof (struct TransportSynMessage),
1939 GNUNET_TIME_UNIT_FOREVER_REL,
1940 send_session_connect_ack_cont, NULL))
1942 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1943 _("Failed to transmit SYN_ACK message via plugin to %s\n"),
1944 GST_plugins_a2s (address));
1946 n = lookup_neighbour (&address->peer);
1952 /* Remove address and request and additional one */
1953 unset_primary_address (n);
1954 n->ack_state = ACK_SEND_SYN_ACK;
1955 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ATS,
1956 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
1962 struct QuotaNotificationRequest
1964 struct GNUNET_PeerIdentity peer;
1965 struct Session *session;
1969 struct QNR_LookContext
1971 struct GNUNET_PeerIdentity peer;
1972 struct Session *session;
1975 struct QuotaNotificationRequest *res;
1979 find_notification_request (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
1981 struct QNR_LookContext *qnr_ctx = cls;
1982 struct QuotaNotificationRequest *qnr = value;
1984 if ((qnr->session == qnr_ctx->session) &&
1985 (0 == memcmp (&qnr->peer,
1987 sizeof (struct GNUNET_PeerIdentity))) &&
1988 (0 == strcmp(qnr_ctx->plugin, qnr->plugin)))
1990 qnr_ctx->res = value;
1998 GST_neighbours_register_quota_notification (void *cls,
1999 const struct GNUNET_PeerIdentity *peer,
2001 struct Session *session)
2003 struct QuotaNotificationRequest *qnr;
2004 struct QNR_LookContext qnr_ctx;
2006 if (NULL == registered_quota_notifications)
2008 return; /* init or shutdown */
2011 qnr_ctx.peer = (*peer);
2012 qnr_ctx.plugin = plugin;
2013 qnr_ctx.session = session;
2016 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
2017 peer, &find_notification_request, &qnr_ctx);
2018 if (NULL != qnr_ctx.res)
2024 qnr = GNUNET_new (struct QuotaNotificationRequest);
2025 qnr->peer = (*peer);
2026 qnr->plugin = GNUNET_strdup (plugin);
2027 qnr->session = session;
2029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2030 "Adding notification for peer `%s' plugin `%s' session %p \n",
2031 GNUNET_i2s (peer), plugin, session);
2033 GNUNET_CONTAINER_multipeermap_put (registered_quota_notifications, peer,
2034 qnr, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2039 GST_neighbours_unregister_quota_notification(void *cls,
2040 const struct GNUNET_PeerIdentity *peer,
2042 struct Session *session)
2044 struct QNR_LookContext qnr_ctx;
2046 if (NULL == registered_quota_notifications)
2048 return; /* init or shutdown */
2051 qnr_ctx.peer = (*peer);
2052 qnr_ctx.plugin = plugin;
2053 qnr_ctx.session = session;
2056 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
2057 &find_notification_request, &qnr_ctx);
2058 if (NULL == qnr_ctx.res)
2064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2065 "Removing notification for peer `%s' plugin `%s' session %p \n",
2066 GNUNET_i2s (peer), plugin, session);
2068 GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, peer,
2070 GNUNET_free (qnr_ctx.res->plugin);
2071 GNUNET_free (qnr_ctx.res);
2076 notification_cb (void *cls,
2077 const struct GNUNET_PeerIdentity *key,
2080 /* struct NeighbourMapEntry *n = cls; */
2081 struct QuotaNotificationRequest *qnr = value;
2082 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2083 struct GNUNET_TIME_Relative delay;
2086 papi = GST_plugins_find(qnr->plugin);
2093 delay = GST_neighbours_calculate_receive_delay (key, 0, &do_forward);
2094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2095 "New inbound delay for peer `%s' is %llu ms\n", GNUNET_i2s (key),
2096 delay.rel_value_us / 1000);
2098 if (NULL != papi->update_inbound_delay)
2099 papi->update_inbound_delay (papi->cls, key, qnr->session, delay);
2105 free_notification_cb (void *cls,
2106 const struct GNUNET_PeerIdentity *key,
2109 /* struct NeighbourMapEntry *n = cls; */
2110 struct QuotaNotificationRequest *qnr = value;
2112 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multipeermap_remove (registered_quota_notifications, key,
2114 GNUNET_free(qnr->plugin);
2122 inbound_bw_tracker_update (void *cls)
2124 struct NeighbourMapEntry *n = cls;
2126 /* Quota was updated, tell plugins to update the time to receive next */
2127 GNUNET_CONTAINER_multipeermap_get_multiple (registered_quota_notifications,
2128 &n->id, ¬ification_cb, n);
2133 * Create a fresh entry in the neighbour map for the given peer
2135 * @param peer peer to create an entry for
2136 * @return new neighbour map entry
2138 static struct NeighbourMapEntry *
2139 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
2141 struct NeighbourMapEntry *n;
2143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2144 "Creating new neighbour entry for `%s'\n",
2146 n = GNUNET_new (struct NeighbourMapEntry);
2148 n->ack_state = ACK_UNDEFINED;
2149 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
2150 n->last_util_transmission = GNUNET_TIME_absolute_get();
2151 n->util_payload_bytes_recv = 0;
2152 n->util_payload_bytes_sent = 0;
2153 n->util_total_bytes_recv = 0;
2154 n->util_total_bytes_sent = 0;
2155 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker, &inbound_bw_tracker_update, n,
2156 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
2157 MAX_BANDWIDTH_CARRY_S);
2158 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
2159 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_NOT_CONNECTED, GNUNET_TIME_UNIT_FOREVER_ABS);
2160 GNUNET_assert (GNUNET_OK ==
2161 GNUNET_CONTAINER_multipeermap_put (neighbours,
2163 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
2171 struct BlacklistCheckSwitchContext
2176 struct BlacklistCheckSwitchContext *prev;
2181 struct BlacklistCheckSwitchContext *next;
2186 struct GST_BlacklistCheck *blc;
2191 struct GNUNET_HELLO_Address *address;
2196 struct Session *session;
2201 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
2206 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
2211 * Black list check result for try_connect call
2212 * If connection to the peer is allowed request adddress and
2214 * @param cls blc_ctx bl context
2215 * @param peer the peer
2216 * @param result the result
2219 try_connect_bl_check_cont (void *cls,
2220 const struct GNUNET_PeerIdentity *peer,
2223 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2224 struct NeighbourMapEntry *n;
2226 GNUNET_CONTAINER_DLL_remove (pending_bc_head,
2229 GNUNET_free (blc_ctx);
2230 if (GNUNET_OK != result)
2232 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2233 _("Blacklisting disapproved to connect to peer `%s'\n"),
2238 /* Setup a new neighbour */
2239 if (NULL != lookup_neighbour(peer))
2240 return; /* The neighbor was created in the meantime while waited for BL clients */
2242 n = setup_neighbour (peer);
2244 /* Request address suggestions for this peer */
2245 set_state_and_timeout (n,
2246 GNUNET_TRANSPORT_PS_INIT_ATS,
2247 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2248 GNUNET_ATS_reset_backoff (GST_ats, peer);
2249 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats,
2256 * Try to create a connection to the given target (eventually).
2258 * @param target peer to try to connect to
2261 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
2263 struct NeighbourMapEntry *n;
2264 struct GST_BlacklistCheck *blc;
2265 struct BlacklistCheckSwitchContext *blc_ctx;
2267 if (NULL == neighbours)
2269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2270 "Asked to connect to peer `%s' during shutdown\n",
2271 GNUNET_i2s (target));
2272 return; /* during shutdown, do nothing */
2274 n = lookup_neighbour (target);
2275 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2276 "Asked to connect to peer `%s' (state: %s)\n",
2277 GNUNET_i2s (target),
2278 (NULL != n) ? GNUNET_TRANSPORT_ps2s(n->state) : "NEW PEER");
2283 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2284 /* this should not be possible */
2286 free_neighbour (n, GNUNET_NO);
2288 case GNUNET_TRANSPORT_PS_INIT_ATS:
2289 case GNUNET_TRANSPORT_PS_SYN_SENT:
2290 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
2291 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
2292 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2293 "Ignoring request to try to connect to `%s', already trying!\n",
2294 GNUNET_i2s (target));
2295 return; /* already trying */
2296 case GNUNET_TRANSPORT_PS_CONNECTED:
2297 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2298 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2299 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
2300 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2301 "Ignoring request to try to connect, already connected to `%s'!\n",
2302 GNUNET_i2s (target));
2303 return; /* already connected */
2304 case GNUNET_TRANSPORT_PS_DISCONNECT:
2305 /* get rid of remains, ready to re-try immediately */
2306 free_neighbour (n, GNUNET_NO);
2308 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2309 /* should not be possible */
2313 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2314 "Unhandled state `%s'\n",
2315 GNUNET_TRANSPORT_ps2s (n->state));
2317 free_neighbour (n, GNUNET_NO);
2322 /* Do blacklist check if connecting to this peer is allowed */
2323 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2324 GNUNET_CONTAINER_DLL_insert (pending_bc_head, pending_bc_tail, blc_ctx);
2326 if (NULL != (blc = GST_blacklist_test_allowed (target, NULL,
2327 &try_connect_bl_check_cont, blc_ctx)))
2335 * We received a 'SYN' message from the other peer.
2336 * Consider switching to it.
2338 * @param message possibly a 'struct TransportSynMessage' (check format)
2339 * @param peer identity of the peer to switch the address for
2340 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
2343 GST_neighbours_handle_session_syn (const struct GNUNET_MessageHeader *message,
2344 const struct GNUNET_PeerIdentity *peer)
2346 const struct TransportSynMessage *scm;
2347 struct NeighbourMapEntry *n;
2348 struct GNUNET_TIME_Absolute ts;
2350 if (ntohs (message->size) != sizeof (struct TransportSynMessage))
2352 GNUNET_break_op (0);
2353 return GNUNET_SYSERR;
2355 GNUNET_STATISTICS_update (GST_stats,
2357 ("# SYN messages received"),
2359 if (NULL == neighbours)
2361 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2362 _("SYN request from peer `%s' ignored due impending shutdown\n"),
2364 return GNUNET_OK; /* we're shutting down */
2366 scm = (const struct TransportSynMessage *) message;
2367 GNUNET_break_op (0 == ntohl (scm->reserved));
2368 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2369 n = lookup_neighbour (peer);
2372 /* This is a new neighbour and set to not connected */
2373 n = setup_neighbour (peer);
2376 /* Remember this SYN message in neighbour */
2377 n->ack_state = ACK_SEND_SYN_ACK;
2378 n->connect_ack_timestamp = ts;
2380 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2381 "Received SYN for peer `%s' in state %s/%s\n",
2383 GNUNET_TRANSPORT_ps2s (n->state),
2384 print_ack_state (n->ack_state));
2388 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2389 /* Request an address from ATS to send SYN_ACK to this peer */
2390 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ATS,
2391 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2392 if (NULL == n->suggest_handle)
2393 GNUNET_ATS_suggest_address (GST_ats, peer);
2395 case GNUNET_TRANSPORT_PS_INIT_ATS:
2396 /* SYN message takes priority over us asking ATS for address:
2397 * Wait for ATS to suggest an address and send SYN_ACK */
2398 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ATS,
2399 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
2401 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
2402 /* We already wait for an address to send an SYN_ACK */
2404 case GNUNET_TRANSPORT_PS_SYN_SENT:
2405 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
2406 /* Send ACK immediately */
2407 n->ack_state = ACK_SEND_ACK;
2408 send_connect_ack_message (n->primary_address.address,
2409 n->primary_address.session, ts);
2411 case GNUNET_TRANSPORT_PS_CONNECTED:
2412 /* we are already connected and can thus send the ACK immediately */
2413 GNUNET_assert (NULL != n->primary_address.address);
2414 GNUNET_assert (NULL != n->primary_address.session);
2415 n->ack_state = ACK_SEND_ACK;
2416 send_connect_ack_message (n->primary_address.address,
2417 n->primary_address.session, ts);
2419 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2420 /* We wait for ATS address suggestion */
2422 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2423 /* We received a SYN message while waiting for a SYN_ACK in fast
2424 * reconnect. Send SYN_ACK immediately */
2425 n->ack_state = ACK_SEND_ACK;
2426 send_connect_ack_message (n->primary_address.address,
2427 n->primary_address.session, n->connect_ack_timestamp);
2429 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
2430 /* We are already connected and can thus send the ACK immediately;
2431 still, it can never hurt to have an alternative address, so also
2432 tell ATS about it */
2433 GNUNET_assert (NULL != n->primary_address.address);
2434 GNUNET_assert (NULL != n->primary_address.session);
2435 n->ack_state = ACK_SEND_ACK;
2436 send_connect_ack_message (n->primary_address.address,
2437 n->primary_address.session, ts);
2439 case GNUNET_TRANSPORT_PS_DISCONNECT:
2440 /* Get rid of remains without terminating sessions, ready to re-try */
2441 free_neighbour (n, GNUNET_YES);
2442 n = setup_neighbour (peer);
2443 /* Remember the SYN time stamp for ACK message */
2444 n->ack_state = ACK_SEND_SYN_ACK;
2445 n->connect_ack_timestamp = ts;
2446 /* Request an address for the peer */
2447 GNUNET_ATS_suggest_address (GST_ats, peer);
2448 GNUNET_ATS_reset_backoff (GST_ats, peer);
2449 set_state (n, GNUNET_TRANSPORT_PS_SYN_RECV_ATS);
2451 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2452 /* should not be possible */
2456 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2457 "Unhandled state `%s'\n",
2458 GNUNET_TRANSPORT_ps2s (n->state));
2460 return GNUNET_SYSERR;
2467 * We've been asked to switch addresses, and just now
2468 * got the result from the blacklist check to see if this
2471 * @param cls the `struct BlacklistCheckSwitchContext` with
2472 * the information about the future address
2473 * @param peer the peer we may switch addresses on
2474 * @param result #GNUNET_NO if we are not allowed to use the new
2478 switch_address_bl_check_cont (void *cls,
2479 const struct GNUNET_PeerIdentity *peer,
2482 struct BlacklistCheckSwitchContext *blc_ctx = cls;
2483 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2484 struct NeighbourMapEntry *n;
2486 papi = GST_plugins_find (blc_ctx->address->transport_name);
2488 if ( (NULL == (n = lookup_neighbour (peer))) || (result == GNUNET_NO) ||
2493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2494 "Peer %s is unknown, suggestion ignored\n",
2497 if (result == GNUNET_NO)
2499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2500 "Blacklist denied to switch to suggested address `%s' session %p for peer `%s'\n",
2501 GST_plugins_a2s (blc_ctx->address),
2503 GNUNET_i2s (&blc_ctx->address->peer));
2507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2508 "Plugin `%s' for suggested address `%s' session %p for peer `%s' is not available\n",
2509 blc_ctx->address->transport_name,
2510 GST_plugins_a2s (blc_ctx->address),
2512 GNUNET_i2s (&blc_ctx->address->peer));
2515 /* This address is blacklisted, delete session */
2516 /* FIXME: tell plugin to force killing session here and now! */
2518 /* Remove blacklist check and clean up */
2519 GNUNET_CONTAINER_DLL_remove (pending_bc_head,
2522 GNUNET_HELLO_address_free (blc_ctx->address);
2523 GNUNET_free (blc_ctx);
2527 if (NULL == blc_ctx->session)
2529 blc_ctx->session = papi->get_session (papi->cls,
2531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2532 "Obtained new session for peer `%s' and address '%s': %p\n",
2533 GNUNET_i2s (&blc_ctx->address->peer),
2534 GST_plugins_a2s (blc_ctx->address),
2536 if (NULL != blc_ctx->session)
2537 GST_ats_new_session (blc_ctx->address,
2541 if (NULL == blc_ctx->session)
2543 /* No session could be obtained, remove blacklist check and clean up */
2544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2545 "Failed to obtain new session for peer `%s' and address '%s'\n",
2546 GNUNET_i2s (&blc_ctx->address->peer),
2547 GST_plugins_a2s (blc_ctx->address));
2548 /* Delete address in ATS */
2549 GNUNET_CONTAINER_DLL_remove (pending_bc_head,
2552 GNUNET_HELLO_address_free (blc_ctx->address);
2553 GNUNET_free (blc_ctx);
2557 if ( (NULL != n->primary_address.address) &&
2558 (0 == GNUNET_HELLO_address_cmp(blc_ctx->address, n->primary_address.address)) )
2560 if (blc_ctx->session == n->primary_address.session)
2562 /* This address is already primary, update only quotas */
2563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2564 "Updating quota for peer `%s' address `%s' session %p\n",
2565 GNUNET_i2s (&blc_ctx->address->peer),
2566 GST_plugins_a2s (blc_ctx->address),
2569 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2570 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2572 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2573 GNUNET_HELLO_address_free(blc_ctx->address);
2574 GNUNET_free (blc_ctx);
2579 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2580 "Peer `%s' switches to address `%s' session %p\n",
2581 GNUNET_i2s (&blc_ctx->address->peer),
2582 GST_plugins_a2s (blc_ctx->address),
2587 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2589 free_neighbour (n, GNUNET_NO);
2591 case GNUNET_TRANSPORT_PS_INIT_ATS:
2592 /* We requested an address and ATS suggests one:
2593 * set primary address and send SYN message*/
2594 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2595 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2596 if ( (ACK_SEND_SYN_ACK == n->ack_state) )
2598 /* Send pending SYN_ACK message */
2599 n->ack_state = ACK_SEND_ACK;
2600 send_connect_ack_message (n->primary_address.address,
2601 n->primary_address.session, n->connect_ack_timestamp);
2603 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_SENT,
2604 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2605 send_syn (&n->primary_address);
2607 case GNUNET_TRANSPORT_PS_SYN_SENT:
2608 /* ATS suggested a new address while waiting for an SYN_ACK:
2609 * Switch and send new SYN */
2610 /* ATS suggests a different address, switch again */
2611 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2612 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2613 if (ACK_SEND_SYN_ACK == n->ack_state)
2615 /* Send pending SYN_ACK message */
2616 n->ack_state = ACK_SEND_ACK;
2617 send_connect_ack_message (n->primary_address.address,
2618 n->primary_address.session, n->connect_ack_timestamp);
2620 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_SENT,
2621 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2622 send_syn (&n->primary_address);
2624 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
2625 /* We requested an address and ATS suggests one:
2626 * set primary address and send SYN_ACK message*/
2627 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2628 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2629 /* Send an ACK message as a response to the SYN msg */
2630 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ACK,
2631 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2632 send_connect_ack_message (n->primary_address.address,
2633 n->primary_address.session,
2634 n->connect_ack_timestamp);
2635 if ( (ACK_SEND_SYN_ACK == n->ack_state) ||
2636 (ACK_UNDEFINED == n->ack_state) )
2637 n->ack_state = ACK_SEND_ACK;
2639 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
2640 /* ATS asks us to switch while we were trying to connect; switch to new
2641 address and check blacklist again */
2642 if ( (ACK_SEND_SYN_ACK == n->ack_state) )
2644 n->ack_state = ACK_SEND_ACK;
2645 send_connect_ack_message (n->primary_address.address,
2646 n->primary_address.session, n->connect_ack_timestamp);
2648 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2649 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2650 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SYN_RECV_ACK,
2651 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2653 case GNUNET_TRANSPORT_PS_CONNECTED:
2654 GNUNET_assert (NULL != n->primary_address.address);
2655 GNUNET_assert (NULL != n->primary_address.session);
2656 if (n->primary_address.session == blc_ctx->session)
2658 /* not an address change, just a quota change */
2659 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2660 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_YES);
2663 /* ATS asks us to switch a life connection; see if we can get
2664 a SYN_ACK on it before we actually do this! */
2665 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2666 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2667 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT,
2668 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2669 GNUNET_STATISTICS_update (GST_stats, gettext_noop
2670 ("# Attempts to switch addresses"), 1, GNUNET_NO);
2671 send_syn (&n->alternative_address);
2673 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
2674 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2675 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2676 if ( (ACK_SEND_SYN_ACK == n->ack_state) )
2678 /* Send pending SYN_ACK message */
2679 n->ack_state = ACK_SEND_ACK;
2680 send_connect_ack_message (n->primary_address.address,
2681 n->primary_address.session, n->connect_ack_timestamp);
2683 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT,
2684 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2685 send_syn (&n->primary_address);
2687 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
2688 /* ATS asks us to switch while we were trying to reconnect; switch to new
2689 address and send SYN again */
2690 set_primary_address (n, blc_ctx->address, blc_ctx->session,
2691 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out, GNUNET_NO);
2692 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT,
2693 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
2694 send_syn (&n->primary_address);
2696 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
2697 if ( (0 == GNUNET_HELLO_address_cmp(n->primary_address.address,
2698 blc_ctx->address) && n->primary_address.session == blc_ctx->session) )
2700 /* ATS switches back to still-active session */
2701 free_address (&n->alternative_address);
2702 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
2705 /* ATS asks us to switch a life connection, send */
2706 set_alternative_address (n, blc_ctx->address, blc_ctx->session,
2707 blc_ctx->bandwidth_in, blc_ctx->bandwidth_out);
2708 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT,
2709 GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT));
2710 send_syn (&n->alternative_address);
2712 case GNUNET_TRANSPORT_PS_DISCONNECT:
2713 /* not going to switch addresses while disconnecting */
2715 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
2719 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2720 "Unhandled state `%s'\n",
2721 GNUNET_TRANSPORT_ps2s (n->state));
2726 GNUNET_CONTAINER_DLL_remove (pending_bc_head, pending_bc_tail, blc_ctx);
2727 GNUNET_HELLO_address_free (blc_ctx->address);
2728 GNUNET_free (blc_ctx);
2733 * For the given peer, switch to this address.
2735 * Before accepting this addresses and actively using it, a blacklist check
2736 * is performed. If this blacklist check fails the address will be destroyed.
2738 * @param peer identity of the peer to switch the address for
2739 * @param address address of the other peer,
2740 * @param session session to use or NULL if transport should initiate a session
2741 * @param bandwidth_in inbound quota to be used when connection is up,
2742 * 0 to disconnect from peer
2743 * @param bandwidth_out outbound quota to be used when connection is up,
2744 * 0 to disconnect from peer
2747 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
2748 const struct GNUNET_HELLO_Address *address,
2749 struct Session *session,
2750 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
2751 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out)
2753 struct NeighbourMapEntry *n;
2754 struct GST_BlacklistCheck *blc;
2755 struct BlacklistCheckSwitchContext *blc_ctx;
2757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2758 "ATS has decided on an address for peer %s\n",
2760 GNUNET_assert (NULL != address->transport_name);
2761 if (NULL == (n = lookup_neighbour (peer)))
2763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2764 "Peer %s is unknown, suggestion ignored\n",
2769 /* Check if plugin is available */
2770 if (NULL == (GST_plugins_find (address->transport_name)))
2772 /* we don't have the plugin for this address */
2776 if ((NULL == session) &&
2777 (GNUNET_HELLO_address_check_option (address,
2778 GNUNET_HELLO_ADDRESS_INFO_INBOUND)))
2780 /* This is a inbound address and we do not have a session to use! */
2785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2786 "ATS suggests %s address '%s' session %p for "
2787 "peer `%s' in state %s/%s \n",
2788 GNUNET_HELLO_address_check_option (address,
2789 GNUNET_HELLO_ADDRESS_INFO_INBOUND) ? "inbound" : "outbound",
2790 GST_plugins_a2s (address), session, GNUNET_i2s (peer),
2791 GNUNET_TRANSPORT_ps2s (n->state), print_ack_state (n->ack_state));
2793 /* Perform blacklist check */
2794 blc_ctx = GNUNET_new (struct BlacklistCheckSwitchContext);
2795 blc_ctx->address = GNUNET_HELLO_address_copy (address);
2796 blc_ctx->session = session;
2797 blc_ctx->bandwidth_in = bandwidth_in;
2798 blc_ctx->bandwidth_out = bandwidth_out;
2799 GNUNET_CONTAINER_DLL_insert (pending_bc_head,
2802 if (NULL != (blc = GST_blacklist_test_allowed (peer,
2803 address->transport_name,
2804 &switch_address_bl_check_cont,
2813 * Function called to send network utilization data to ATS for
2814 * each active connection.
2817 * @param key peer we send utilization data for
2818 * @param value the `struct NeighbourMapEntry *` with data to send
2819 * @return #GNUNET_OK (continue to iterate)
2822 send_utilization_data (void *cls,
2823 const struct GNUNET_PeerIdentity *key,
2826 struct NeighbourMapEntry *n = value;
2827 struct GNUNET_ATS_Information atsi[4];
2829 uint32_t bps_pl_out;
2832 struct GNUNET_TIME_Relative delta;
2834 if (GNUNET_TRANSPORT_PS_CONNECTED != n->state)
2836 delta = GNUNET_TIME_absolute_get_difference (n->last_util_transmission,
2837 GNUNET_TIME_absolute_get ());
2841 if ((0 != n->util_payload_bytes_recv) && (0 != delta.rel_value_us))
2842 bps_pl_in = (1000LL * 1000LL * n->util_payload_bytes_recv) / (delta.rel_value_us);
2844 if ((0 != n->util_payload_bytes_sent) && (0 != delta.rel_value_us))
2845 bps_pl_out = (1000LL * 1000LL * n->util_payload_bytes_sent) / delta.rel_value_us;
2846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2847 "`%s' payload: received %u Bytes/s, sent %u Bytes/s\n",
2852 if ((0 != n->util_total_bytes_recv) && (0 != delta.rel_value_us))
2853 bps_in = (1000LL * 1000LL * n->util_total_bytes_recv) / (delta.rel_value_us);
2855 if ((0 != n->util_total_bytes_sent) && (0 != delta.rel_value_us))
2856 bps_out = (1000LL * 1000LL * n->util_total_bytes_sent) / delta.rel_value_us;
2859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2860 "`%s' total: received %u Bytes/s, sent %u Bytes/s\n",
2864 atsi[0].type = htonl (GNUNET_ATS_UTILIZATION_OUT);
2865 atsi[0].value = htonl (bps_out);
2866 atsi[1].type = htonl (GNUNET_ATS_UTILIZATION_IN);
2867 atsi[1].value = htonl (bps_in);
2869 atsi[2].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_OUT);
2870 atsi[2].value = htonl (bps_pl_out);
2871 atsi[3].type = htonl (GNUNET_ATS_UTILIZATION_PAYLOAD_IN);
2872 atsi[3].value = htonl (bps_pl_in);
2874 GST_ats_update_metrics (n->primary_address.address,
2875 n->primary_address.session,
2877 n->util_payload_bytes_recv = 0;
2878 n->util_payload_bytes_sent = 0;
2879 n->util_total_bytes_recv = 0;
2880 n->util_total_bytes_sent = 0;
2881 n->last_util_transmission = GNUNET_TIME_absolute_get();
2887 * Task transmitting utilization in a regular interval
2889 * @param cls the 'struct NeighbourMapEntry' for which we are running
2890 * @param tc scheduler context (unused)
2893 utilization_transmission (void *cls,
2894 const struct GNUNET_SCHEDULER_TaskContext *tc)
2896 util_transmission_tk = NULL;
2898 if (0 < GNUNET_CONTAINER_multipeermap_size (neighbours))
2899 GNUNET_CONTAINER_multipeermap_iterate (neighbours, send_utilization_data, NULL);
2901 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
2902 utilization_transmission, NULL);
2908 GST_neighbours_notify_data_recv (const struct GNUNET_PeerIdentity *peer,
2909 const struct GNUNET_HELLO_Address *address,
2910 struct Session *session,
2911 const struct GNUNET_MessageHeader *message)
2913 struct NeighbourMapEntry *n;
2915 n = lookup_neighbour (peer);
2918 n->util_total_bytes_recv += ntohs(message->size);
2923 GST_neighbours_notify_payload_recv (const struct GNUNET_PeerIdentity *peer,
2924 const struct GNUNET_HELLO_Address *address,
2925 struct Session *session,
2926 const struct GNUNET_MessageHeader *message)
2928 struct NeighbourMapEntry *n;
2929 n = lookup_neighbour (peer);
2932 n->util_payload_bytes_recv += ntohs(message->size);
2937 GST_neighbours_notify_data_sent (const struct GNUNET_PeerIdentity *peer,
2938 const struct GNUNET_HELLO_Address *address,
2939 struct Session *session,
2942 struct NeighbourMapEntry *n;
2943 n = lookup_neighbour (peer);
2946 if (n->primary_address.session != session)
2948 n->util_total_bytes_sent += size;
2953 GST_neighbours_notify_payload_sent (const struct GNUNET_PeerIdentity *peer,
2956 struct NeighbourMapEntry *n;
2957 n = lookup_neighbour (peer);
2960 n->util_payload_bytes_sent += size;
2965 * Master task run for every neighbour. Performs all of the time-related
2966 * activities (keep alive, send next message, disconnect if idle, finish
2967 * clean up after disconnect).
2969 * @param cls the 'struct NeighbourMapEntry' for which we are running
2970 * @param tc scheduler context (unused)
2973 master_task (void *cls,
2974 const struct GNUNET_SCHEDULER_TaskContext *tc)
2976 struct NeighbourMapEntry *n = cls;
2977 struct GNUNET_TIME_Relative delay;
2980 delay = GNUNET_TIME_absolute_get_remaining (n->timeout);
2981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2982 "Master task runs for neighbour `%s' in state %s with timeout in %s\n",
2983 GNUNET_i2s (&n->id),
2984 GNUNET_TRANSPORT_ps2s(n->state),
2985 GNUNET_STRINGS_relative_time_to_string (delay,
2989 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
2990 /* invalid state for master task, clean up */
2992 free_neighbour (n, GNUNET_NO);
2994 case GNUNET_TRANSPORT_PS_INIT_ATS:
2995 if (0 == delay.rel_value_us)
2997 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2998 "Connection to `%s' timed out waiting for ATS to provide address\n",
2999 GNUNET_i2s (&n->id));
3000 free_neighbour (n, GNUNET_NO);
3004 case GNUNET_TRANSPORT_PS_SYN_SENT:
3005 if (0 == delay.rel_value_us)
3007 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3008 "Connection to `%s' timed out waiting for other peer to send SYN_ACK\n",
3009 GNUNET_i2s (&n->id));
3010 /* Remove address and request and additional one */
3011 unset_primary_address (n);
3012 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
3013 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3017 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
3018 if (0 == delay.rel_value_us)
3020 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3021 "Connection to `%s' timed out waiting ATS to provide address to use for SYN_ACK\n",
3022 GNUNET_i2s (&n->id));
3023 free_neighbour (n, GNUNET_NO);
3027 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
3028 if (0 == delay.rel_value_us)
3030 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3031 "Connection to `%s' timed out waiting for other peer to send ACK\n",
3032 GNUNET_i2s (&n->id));
3033 disconnect_neighbour (n);
3037 case GNUNET_TRANSPORT_PS_CONNECTED:
3038 if (0 == delay.rel_value_us)
3040 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3041 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
3042 GNUNET_i2s (&n->id));
3043 disconnect_neighbour (n);
3046 try_transmission_to_peer (n);
3049 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3050 if (0 == delay.rel_value_us)
3052 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3053 "Connection to `%s' timed out, waiting for ATS replacement address\n",
3054 GNUNET_i2s (&n->id));
3055 disconnect_neighbour (n);
3059 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3060 if (0 == delay.rel_value_us)
3062 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3063 "Connection to `%s' timed out, waiting for other peer to SYN_ACK replacement address\n",
3064 GNUNET_i2s (&n->id));
3065 disconnect_neighbour (n);
3069 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
3070 if (0 == delay.rel_value_us)
3072 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3073 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs (after trying to SYN on alternative address)\n",
3074 GNUNET_i2s (&n->id));
3075 GNUNET_STATISTICS_update (GST_stats,
3076 gettext_noop ("# Failed attempts to switch addresses (no response)"),
3079 disconnect_neighbour (n);
3082 try_transmission_to_peer (n);
3085 case GNUNET_TRANSPORT_PS_DISCONNECT:
3086 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3087 "Cleaning up connection to `%s' after sending DISCONNECT\n",
3088 GNUNET_i2s (&n->id));
3089 free_neighbour (n, GNUNET_NO);
3091 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3092 /* how did we get here!? */
3096 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3097 "Unhandled state `%s'\n",
3098 GNUNET_TRANSPORT_ps2s (n->state));
3102 if ( (GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT == n->state) ||
3103 (GNUNET_TRANSPORT_PS_CONNECTED == n->state) )
3105 /* if we are *now* in one of the two states, we're sending
3106 keep alive messages, so we need to consider the keepalive
3107 delay, not just the connection timeout */
3108 delay = GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time),
3111 if (NULL == n->task)
3112 n->task = GNUNET_SCHEDULER_add_delayed (delay,
3119 * Send a ACK message to the neighbour to confirm that we
3122 * @param n neighbour to send the ACK to
3125 send_session_ack_message (struct NeighbourMapEntry *n)
3127 struct GNUNET_MessageHeader msg;
3129 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Sending ACK message to peer `%s'\n",
3130 GNUNET_i2s (&n->id));
3132 msg.size = htons (sizeof (struct GNUNET_MessageHeader));
3133 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
3134 (void) send_with_session(n,
3135 (const char *) &msg, sizeof (struct GNUNET_MessageHeader),
3136 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_NO,
3142 * We received a 'SESSION_SYN_ACK' message from the other peer.
3143 * Consider switching to it.
3145 * @param message possibly a 'struct SessionConnectMessage' (check format)
3146 * @param peer identity of the peer to switch the address for
3147 * @param address address of the other peer, NULL if other peer
3149 * @param session session to use (or NULL)
3150 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3153 GST_neighbours_handle_session_syn_ack (const struct GNUNET_MessageHeader *message,
3154 const struct GNUNET_PeerIdentity *peer,
3155 const struct GNUNET_HELLO_Address *address,
3156 struct Session *session)
3158 const struct TransportSynMessage *scm;
3159 struct GNUNET_TIME_Absolute ts;
3160 struct NeighbourMapEntry *n;
3162 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3163 "Received SYN_ACK message from peer `%s'\n",
3166 if (ntohs (message->size) != sizeof (struct TransportSynMessage))
3168 GNUNET_break_op (0);
3169 return GNUNET_SYSERR;
3171 GNUNET_STATISTICS_update (GST_stats,
3173 ("# SYN_ACK messages received"),
3175 scm = (const struct TransportSynMessage *) message;
3176 GNUNET_break_op (ntohl (scm->reserved) == 0);
3177 if (NULL == (n = lookup_neighbour (peer)))
3179 GNUNET_STATISTICS_update (GST_stats,
3181 ("# unexpected SYN_ACK messages (no peer)"),
3183 return GNUNET_SYSERR;
3185 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
3188 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3190 free_neighbour (n, GNUNET_NO);
3191 return GNUNET_SYSERR;
3192 case GNUNET_TRANSPORT_PS_INIT_ATS:
3193 GNUNET_STATISTICS_update (GST_stats,
3195 ("# unexpected SYN_ACK messages (not ready)"),
3198 case GNUNET_TRANSPORT_PS_SYN_SENT:
3199 if (ts.abs_value_us != n->primary_address.connect_timestamp.abs_value_us)
3201 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3202 "SYN_ACK ignored as the timestamp does not match our SYN request\n");
3205 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3206 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3207 GNUNET_STATISTICS_set (GST_stats,
3208 gettext_noop ("# peers connected"),
3209 ++neighbours_connected,
3211 connect_notify_cb (callback_cls, &n->id,
3212 n->primary_address.bandwidth_in,
3213 n->primary_address.bandwidth_out);
3214 /* Tell ATS that the outbound session we created to send SYN was successful */
3215 set_primary_address (n,
3216 n->primary_address.address,
3217 n->primary_address.session,
3218 n->primary_address.bandwidth_in,
3219 n->primary_address.bandwidth_out,
3221 send_session_ack_message (n);
3223 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
3224 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
3225 GNUNET_STATISTICS_update (GST_stats,
3227 ("# unexpected SYN_ACK messages (not ready)"),
3230 case GNUNET_TRANSPORT_PS_CONNECTED:
3231 /* duplicate SYN_ACK, let's answer by duplicate ACK just in case */
3232 send_session_ack_message (n);
3234 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3235 /* we didn't expect any SYN_ACK, as we are waiting for ATS
3236 to give us a new address... */
3237 GNUNET_STATISTICS_update (GST_stats,
3239 ("# unexpected SYN_ACK messages (waiting on ATS)"),
3242 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3243 /* Reconnecting with new address address worked; go back to connected! */
3244 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3245 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3246 send_session_ack_message (n);
3248 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
3249 /* new address worked; adopt it and go back to connected! */
3250 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3251 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3252 GNUNET_break (GNUNET_NO == n->alternative_address.ats_active);
3254 /* Set primary addresses */
3255 set_primary_address (n, n->alternative_address.address,
3256 n->alternative_address.session, n->alternative_address.bandwidth_in,
3257 n->alternative_address.bandwidth_out, GNUNET_YES);
3258 GNUNET_STATISTICS_update (GST_stats, gettext_noop
3259 ("# Successful attempts to switch addresses"), 1, GNUNET_NO);
3261 free_address (&n->alternative_address);
3262 send_session_ack_message (n);
3264 case GNUNET_TRANSPORT_PS_DISCONNECT:
3265 GNUNET_STATISTICS_update (GST_stats,
3267 ("# unexpected SYN_ACK messages (disconnecting)"),
3269 return GNUNET_SYSERR;
3270 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3274 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3275 "Unhandled state `%s'\n",
3276 GNUNET_TRANSPORT_ps2s (n->state));
3278 return GNUNET_SYSERR;
3285 * A session was terminated. Take note; if needed, try to get
3286 * an alternative address from ATS.
3288 * @param peer identity of the peer where the session died
3289 * @param session session that is gone
3290 * @return #GNUNET_YES if this was a session used, #GNUNET_NO if
3291 * this session was not in use
3294 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
3295 struct Session *session)
3297 struct NeighbourMapEntry *n;
3298 struct BlackListCheckContext *bcc;
3299 struct BlackListCheckContext *bcc_next;
3301 /* make sure to cancel all ongoing blacklist checks involving 'session' */
3303 while (NULL != (bcc = bcc_next))
3305 bcc_next = bcc->next;
3306 if (bcc->na.session == session)
3308 if (NULL != bcc->bc)
3309 GST_blacklist_test_cancel (bcc->bc);
3310 GNUNET_HELLO_address_free (bcc->na.address);
3311 GNUNET_CONTAINER_DLL_remove (bc_head,
3317 if (NULL == (n = lookup_neighbour (peer)))
3318 return GNUNET_NO; /* can't affect us */
3319 if (session != n->primary_address.session)
3321 /* Free alternative address */
3322 if (session == n->alternative_address.session)
3324 if ( (GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT == n->state) )
3325 set_state (n, GNUNET_TRANSPORT_PS_CONNECTED);
3326 free_address (&n->alternative_address);
3328 return GNUNET_NO; /* doesn't affect us further */
3331 n->expect_latency_response = GNUNET_NO;
3332 /* The session for neighbour's primary address died */
3335 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3337 free_neighbour (n, GNUNET_NO);
3339 case GNUNET_TRANSPORT_PS_INIT_ATS:
3341 free_neighbour (n, GNUNET_NO);
3343 case GNUNET_TRANSPORT_PS_SYN_SENT:
3344 /* The session used to send the SYN terminated:
3345 * this implies a connect error*/
3346 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3347 "Failed to send SYN in %s with `%s' %p: session terminated\n",
3349 GST_plugins_a2s (n->primary_address.address),
3350 n->primary_address.session,
3353 /* Destroy the address since it cannot be used */
3354 unset_primary_address (n);
3355 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_INIT_ATS,
3356 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3358 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
3359 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
3360 /* error on inbound session; free neighbour entirely */
3361 free_address (&n->primary_address);
3362 free_neighbour (n, GNUNET_NO);
3364 case GNUNET_TRANSPORT_PS_CONNECTED:
3365 /* Our primary connection died, try a fast reconnect */
3366 unset_primary_address (n);
3367 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3368 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3370 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3371 /* we don't have an address, how can it go down? */
3374 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3375 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3376 "Failed to send SYN in %s with `%s' %p: session terminated\n",
3378 GST_plugins_a2s (n->primary_address.address),
3379 n->primary_address.session,
3381 /* Destroy the address since it cannot be used */
3382 unset_primary_address (n);
3383 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_ATS,
3384 GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT));
3386 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
3387 /* primary went down while we were waiting for SYN_ACK on secondary;
3388 secondary as primary */
3390 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3391 "Connection `%s' %p to peer `%s' was terminated while switching, "
3392 "switching to alternative address `%s' %p\n",
3393 GST_plugins_a2s (n->primary_address.address),
3394 n->primary_address.session,
3396 GST_plugins_a2s (n->alternative_address.address),
3397 n->alternative_address.session);
3399 /* Destroy the inbound address since it cannot be used */
3400 free_address (&n->primary_address);
3401 n->primary_address = n->alternative_address;
3402 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
3403 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_RECONNECT_SENT,
3404 GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT));
3406 case GNUNET_TRANSPORT_PS_DISCONNECT:
3407 free_address (&n->primary_address);
3409 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3410 /* neighbour was freed and plugins told to terminate session */
3414 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3415 "Unhandled state `%s'\n",
3416 GNUNET_TRANSPORT_ps2s (n->state));
3420 if (NULL != n->task)
3421 GNUNET_SCHEDULER_cancel (n->task);
3422 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
3428 * We received a 'ACK' message from the other peer.
3429 * If we sent a 'SYN_ACK' last, this means we are now
3430 * connected. Otherwise, do nothing.
3432 * @param message possibly a 'struct SessionConnectMessage' (check format)
3433 * @param peer identity of the peer to switch the address for
3434 * @param address address of the other peer, NULL if other peer
3436 * @param session session to use (or NULL)
3437 * @return #GNUNET_OK if the message was fine, #GNUNET_SYSERR on serious error
3440 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
3441 const struct GNUNET_PeerIdentity *peer,
3442 const struct GNUNET_HELLO_Address *address,
3443 struct Session *session)
3445 struct NeighbourMapEntry *n;
3447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3448 "Received ACK message from peer `%s'\n",
3450 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
3452 GNUNET_break_op (0);
3453 return GNUNET_SYSERR;
3455 GNUNET_STATISTICS_update (GST_stats,
3457 ("# ACK messages received"),
3459 if (NULL == (n = lookup_neighbour (peer)))
3461 GNUNET_break_op (0);
3462 return GNUNET_SYSERR;
3465 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3466 "Received %s for peer `%s' in state %s/%s\n",
3469 GNUNET_TRANSPORT_ps2s (n->state),
3470 print_ack_state (n->ack_state));
3472 /* Check if we are in a plausible state for having sent
3473 a SYN_ACK. If not, return, otherwise break.
3475 The remote peers sends a ACK as a response for a SYN_ACK
3479 - If a remote peer has sent a SYN, we responded with a SYN_ACK and
3480 now wait for the ACK to finally be connected
3481 - If we sent a SYN_ACK to this peer before */
3483 if ( (GNUNET_TRANSPORT_PS_SYN_RECV_ACK != n->state) &&
3484 (ACK_SEND_ACK != n->ack_state))
3486 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3487 "Received unexpected ACK message from peer `%s' in state %s/%s\n",
3489 GNUNET_TRANSPORT_ps2s (n->state),
3490 print_ack_state (n->ack_state));
3492 GNUNET_STATISTICS_update (GST_stats,
3493 gettext_noop ("# unexpected ACK messages"), 1,
3498 /* We are connected */
3499 if (GNUNET_NO == GST_neighbours_test_connected(&n->id))
3501 /* Notify about connection */
3502 connect_notify_cb (callback_cls, &n->id,
3503 n->primary_address.bandwidth_in,
3504 n->primary_address.bandwidth_out);\
3506 GNUNET_STATISTICS_set (GST_stats,
3507 gettext_noop ("# peers connected"),
3508 ++neighbours_connected,
3512 if (GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT == n->state)
3514 /* We tried to switch addresses while being connect. We explicitly wait
3515 * for a SYN_ACK before going to GNUNET_TRANSPORT_PS_CONNECTED,
3516 * so we do not want to set the address as in use! */
3520 set_state_and_timeout (n, GNUNET_TRANSPORT_PS_CONNECTED,
3521 GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT));
3523 /* Set primary address to used */
3524 set_primary_address (n,
3525 n->primary_address.address,
3526 n->primary_address.session,
3527 n->primary_address.bandwidth_in,
3528 n->primary_address.bandwidth_out,
3535 * Test if we're connected to the given peer.
3537 * @param target peer to test
3538 * @return #GNUNET_YES if we are connected, #GNUNET_NO if not
3541 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
3543 return test_connected (lookup_neighbour (target));
3548 * Change the incoming quota for the given peer.
3550 * @param neighbour identity of peer to change qutoa for
3551 * @param quota new quota
3554 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
3555 struct GNUNET_BANDWIDTH_Value32NBO quota)
3557 struct NeighbourMapEntry *n;
3559 if (NULL == (n = lookup_neighbour (neighbour)))
3561 GNUNET_STATISTICS_update (GST_stats,
3563 ("# SET QUOTA messages ignored (no such peer)"),
3567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3568 "Setting inbound quota of %u Bps for peer `%s' to all clients\n",
3569 ntohl (quota.value__), GNUNET_i2s (&n->id));
3570 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
3571 if (0 != ntohl (quota.value__))
3573 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3574 "Disconnecting peer `%4s' due to SET_QUOTA\n",
3575 GNUNET_i2s (&n->id));
3576 if (GNUNET_YES == test_connected (n))
3577 GNUNET_STATISTICS_update (GST_stats,
3578 gettext_noop ("# disconnects due to quota of 0"),
3580 disconnect_neighbour (n);
3585 delayed_disconnect (void *cls,
3586 const struct GNUNET_SCHEDULER_TaskContext* tc)
3588 struct NeighbourMapEntry *n = cls;
3590 n->delayed_disconnect_task = NULL;
3591 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3592 "Disconnecting by request from peer %s\n",
3593 GNUNET_i2s (&n->id));
3594 free_neighbour (n, GNUNET_NO);
3599 * We received a disconnect message from the given peer,
3600 * validate and process.
3602 * @param peer sender of the message
3603 * @param msg the disconnect message
3606 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity *peer,
3607 const struct GNUNET_MessageHeader *msg)
3609 struct NeighbourMapEntry *n;
3610 const struct SessionDisconnectMessage *sdm;
3612 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3613 "Received DISCONNECT message from peer `%s'\n",
3615 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
3617 GNUNET_break_op (0);
3618 GNUNET_STATISTICS_update (GST_stats,
3620 ("# disconnect messages ignored (malformed)"), 1,
3624 GNUNET_STATISTICS_update (GST_stats,
3626 ("# DISCONNECT messages received"),
3628 sdm = (const struct SessionDisconnectMessage *) msg;
3629 if (NULL == (n = lookup_neighbour (peer)))
3630 return; /* gone already */
3631 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value_us <= n->connect_ack_timestamp.abs_value_us)
3633 GNUNET_STATISTICS_update (GST_stats,
3635 ("# disconnect messages ignored (timestamp)"), 1,
3639 if (0 != memcmp (peer, &sdm->public_key, sizeof (struct GNUNET_PeerIdentity)))
3641 GNUNET_break_op (0);
3644 if (ntohl (sdm->purpose.size) !=
3645 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
3646 sizeof (struct GNUNET_CRYPTO_EddsaPublicKey) +
3647 sizeof (struct GNUNET_TIME_AbsoluteNBO))
3649 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3650 "%s message from peer `%s' has invalid size \n",
3653 GNUNET_break_op (0);
3657 GNUNET_CRYPTO_eddsa_verify
3658 (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
3659 &sdm->signature, &sdm->public_key))
3661 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3662 "%s message from peer `%s' cannot be verified \n",
3665 GNUNET_break_op (0);
3668 n->delayed_disconnect_task = GNUNET_SCHEDULER_add_now (&delayed_disconnect, n);
3673 * Closure for the neighbours_iterate function.
3675 struct IteratorContext
3678 * Function to call on each connected neighbour.
3680 GST_NeighbourIterator cb;
3690 * Call the callback from the closure for each neighbour.
3692 * @param cls the `struct IteratorContext`
3693 * @param key the hash of the public key of the neighbour
3694 * @param value the `struct NeighbourMapEntry`
3695 * @return #GNUNET_OK (continue to iterate)
3698 neighbours_iterate (void *cls,
3699 const struct GNUNET_PeerIdentity *key,
3702 struct IteratorContext *ic = cls;
3703 struct NeighbourMapEntry *n = value;
3704 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
3705 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
3708 if (NULL != n->primary_address.address)
3710 bandwidth_in = n->primary_address.bandwidth_in;
3711 bandwidth_out = n->primary_address.bandwidth_out;
3715 bandwidth_in = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3716 bandwidth_out = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3720 n->primary_address.address,
3723 bandwidth_in, bandwidth_out);
3729 * Iterate over all connected neighbours.
3731 * @param cb function to call
3732 * @param cb_cls closure for cb
3735 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
3737 struct IteratorContext ic;
3739 if (NULL == neighbours)
3740 return; /* can happen during shutdown */
3743 GNUNET_CONTAINER_multipeermap_iterate (neighbours, &neighbours_iterate, &ic);
3748 * If we have an active connection to the given target, it must be shutdown.
3750 * @param target peer to disconnect from
3753 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
3755 struct NeighbourMapEntry *n;
3757 if (NULL == (n = lookup_neighbour (target)))
3758 return; /* not active */
3759 if (GNUNET_YES == test_connected (n))
3760 GNUNET_STATISTICS_update (GST_stats,
3762 ("# disconnected from peer upon explicit request"), 1,
3764 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3765 "Forced disconnect from peer %s\n",
3766 GNUNET_i2s (target));
3767 disconnect_neighbour (n);
3772 * Obtain current latency information for the given neighbour.
3774 * @param peer to get the latency for
3775 * @return observed latency of the address, FOREVER if the
3776 * the connection is not up
3778 struct GNUNET_TIME_Relative
3779 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
3781 struct NeighbourMapEntry *n;
3783 n = lookup_neighbour (peer);
3785 return GNUNET_TIME_UNIT_FOREVER_REL;
3788 case GNUNET_TRANSPORT_PS_CONNECTED:
3789 case GNUNET_TRANSPORT_PS_SWITCH_SYN_SENT:
3790 case GNUNET_TRANSPORT_PS_RECONNECT_SENT:
3791 case GNUNET_TRANSPORT_PS_RECONNECT_ATS:
3793 case GNUNET_TRANSPORT_PS_NOT_CONNECTED:
3794 case GNUNET_TRANSPORT_PS_INIT_ATS:
3795 case GNUNET_TRANSPORT_PS_SYN_RECV_ATS:
3796 case GNUNET_TRANSPORT_PS_SYN_RECV_ACK:
3797 case GNUNET_TRANSPORT_PS_SYN_SENT:
3798 case GNUNET_TRANSPORT_PS_DISCONNECT:
3799 case GNUNET_TRANSPORT_PS_DISCONNECT_FINISHED:
3800 return GNUNET_TIME_UNIT_FOREVER_REL;
3802 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3803 "Unhandled state `%s'\n",
3804 GNUNET_TRANSPORT_ps2s (n->state));
3808 return GNUNET_TIME_UNIT_FOREVER_REL;
3813 * Obtain current address information for the given neighbour.
3816 * @return address currently used
3818 struct GNUNET_HELLO_Address *
3819 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer)
3821 struct NeighbourMapEntry *n;
3823 n = lookup_neighbour (peer);
3826 return n->primary_address.address;
3831 * Initialize the neighbours subsystem.
3833 * @param cls closure for callbacks
3834 * @param connect_cb function to call if we connect to a peer
3835 * @param disconnect_cb function to call if we disconnect from a peer
3836 * @param peer_address_cb function to call if we change an active address
3838 * @param max_fds maximum number of fds to use
3841 GST_neighbours_start (void *cls,
3842 NotifyConnect connect_cb,
3843 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
3844 GNUNET_TRANSPORT_NeighbourChangeCallback peer_address_cb,
3845 unsigned int max_fds)
3848 connect_notify_cb = connect_cb;
3849 disconnect_notify_cb = disconnect_cb;
3850 neighbour_change_cb = peer_address_cb;
3851 neighbours = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3852 registered_quota_notifications = GNUNET_CONTAINER_multipeermap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3853 util_transmission_tk = GNUNET_SCHEDULER_add_delayed (UTIL_TRANSMISSION_INTERVAL,
3854 utilization_transmission, NULL);
3859 * Disconnect from the given neighbour.
3862 * @param key hash of neighbour's public key (not used)
3863 * @param value the 'struct NeighbourMapEntry' of the neighbour
3864 * @return #GNUNET_OK (continue to iterate)
3867 disconnect_all_neighbours (void *cls,
3868 const struct GNUNET_PeerIdentity *key,
3871 struct NeighbourMapEntry *n = value;
3873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3874 "Disconnecting peer `%4s', %s\n",
3875 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
3876 free_neighbour (n, GNUNET_NO);
3882 * Cleanup the neighbours subsystem.
3885 GST_neighbours_stop ()
3887 struct BlacklistCheckSwitchContext *cur;
3888 struct BlacklistCheckSwitchContext *next;
3890 if (NULL == neighbours)
3892 if (NULL != util_transmission_tk)
3894 GNUNET_SCHEDULER_cancel (util_transmission_tk);
3895 util_transmission_tk = NULL;
3897 GNUNET_CONTAINER_multipeermap_iterate (neighbours,
3898 &disconnect_all_neighbours,
3900 GNUNET_CONTAINER_multipeermap_destroy (neighbours);
3902 next = pending_bc_head;
3903 for (cur = next; NULL != cur; cur = next)
3906 GNUNET_CONTAINER_DLL_remove (pending_bc_head,
3910 if (NULL != cur->blc)
3912 GST_blacklist_test_cancel (cur->blc);
3915 if (NULL != cur->address)
3916 GNUNET_HELLO_address_free (cur->address);
3920 GNUNET_CONTAINER_multipeermap_iterate (registered_quota_notifications,
3921 &free_notification_cb, NULL);
3922 GNUNET_CONTAINER_multipeermap_destroy (registered_quota_notifications);
3923 registered_quota_notifications = NULL;
3926 callback_cls = NULL;
3927 connect_notify_cb = NULL;
3928 disconnect_notify_cb = NULL;
3929 neighbour_change_cb = NULL;
3933 /* end of file gnunet-service-transport_neighbours.c */