2 This file is part of GNUnet.
3 (C) 2010,2011,2012 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 * - "address_change_cb" is NEVER invoked; when should we call this one exactly?
28 * - TEST, TEST, TEST...
31 #include "gnunet_ats_service.h"
32 #include "gnunet-service-transport_neighbours.h"
33 #include "gnunet-service-transport_plugins.h"
34 #include "gnunet-service-transport_validation.h"
35 #include "gnunet-service-transport_clients.h"
36 #include "gnunet-service-transport.h"
37 #include "gnunet_peerinfo_service.h"
38 #include "gnunet-service-transport_blacklist.h"
39 #include "gnunet_constants.h"
40 #include "transport.h"
45 * Size of the neighbour hash map.
47 #define NEIGHBOUR_TABLE_SIZE 256
50 * Time we give plugin to transmit DISCONNECT message before the
51 * neighbour entry self-destructs.
53 #define DISCONNECT_SENT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 100)
56 * How often must a peer violate bandwidth quotas before we start
57 * to simply drop its messages?
59 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
62 * How often do we send KEEPALIVE messages to each of our neighbours and measure
63 * the latency with this neighbour?
64 * (idle timeout is 5 minutes or 300 seconds, so with 100s interval we
65 * send 3 keepalives in each interval, so 3 messages would need to be
66 * lost in a row for a disconnect).
68 #define KEEPALIVE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 100)
71 * How long are we willing to wait for a response from ATS before timing out?
73 #define ATS_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
76 * How long are we willing to wait for an ACK from the other peer before
77 * giving up on our connect operation?
79 #define SETUP_CONNECTION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
82 * How long are we willing to wait for a successful reconnect if
83 * an existing connection went down? Much shorter than the
84 * usual SETUP_CONNECTION_TIMEOUT as we do not inform the
85 * higher layers about the disconnect during this period.
87 #define FAST_RECONNECT_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
90 * How long are we willing to wait for a response from the blacklist
91 * subsystem before timing out?
93 #define BLACKLIST_RESPONSE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 500)
95 #define DEBUG_MALLOC GNUNET_NO
101 struct Allocator *prev;
102 struct Allocator *next;
104 unsigned int bytes_alloced;
105 unsigned int max_alloced;
109 struct GNUNET_TIME_Absolute max_alloced_when;
110 struct GNUNET_TIME_Absolute last_alloced_when;
114 struct Allocator *aehead;
115 struct Allocator *aetail;
119 struct Allocation *prev;
120 struct Allocation *next;
122 struct Allocator *alloc;
123 unsigned int bytes_alloced;
128 struct Allocation *ahead;
129 struct Allocation *atail;
131 static int bytes_alloced;
133 static struct Allocator *
134 find_allocator (int line)
136 struct Allocator *cur = aehead;
139 if (line == cur->line)
149 static int start = GNUNET_YES;
150 static struct GNUNET_TIME_Absolute next;
151 static struct GNUNET_TIME_Relative rem;
152 struct Allocator *cur = aehead;
155 next = GNUNET_TIME_UNIT_ZERO_ABS;
158 if (0 == (rem = GNUNET_TIME_absolute_get_remaining(next)).rel_value)
160 fprintf (stderr, "Allocated in `%s' total: %5u bytes\n", __FILE__, bytes_alloced);
163 char *last_alloc = GNUNET_strdup (GNUNET_STRINGS_absolute_time_to_string(cur->max_alloced_when));
164 fprintf (stderr, "Allocated from line %4u :%5u bytes (diff %5i bytes, max alloc: %5u @ %s, last alloc %s)\n",
165 cur->line, cur->bytes_alloced, cur->diff, cur->max_alloced,
167 GNUNET_STRINGS_absolute_time_to_string(cur->last_alloced_when));
168 GNUNET_free (last_alloc);
172 fprintf (stderr, "\n");
173 next = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), GNUNET_TIME_UNIT_SECONDS);
180 MEMDEBUG_add_alloc (void *p, size_t size, int line)
183 struct Allocation *alloc = GNUNET_malloc (sizeof (struct Allocation));
184 struct Allocator *allocator = find_allocator(line);
185 if (NULL == allocator)
187 allocator = GNUNET_malloc (sizeof (struct Allocator));
188 allocator->line = line;
189 GNUNET_CONTAINER_DLL_insert (aehead, aetail, allocator);
191 alloc->alloc = allocator;
194 alloc->bytes_alloced = size;
195 allocator->bytes_alloced += size;
196 allocator->last_alloced_when = GNUNET_TIME_absolute_get();
197 if (allocator->bytes_alloced >= allocator->max_alloced)
199 allocator->max_alloced = allocator->bytes_alloced;
200 allocator->max_alloced_when = allocator->last_alloced_when;
202 allocator->diff += size;
203 GNUNET_CONTAINER_DLL_insert (ahead, atail, alloc);
205 bytes_alloced += size;
211 MEMDEBUG_malloc (size_t size, int line)
215 ret = GNUNET_malloc (size);
218 MEMDEBUG_add_alloc (ret, size, line);
225 MEMDEBUG_free (void * alloc, int line)
228 struct Allocation *cur;
229 struct Allocator *allocator;
239 fprintf (stderr, "Unmonitored free from line %4u\n", line);
243 allocator = cur->alloc;
244 if (NULL == allocator)
248 GNUNET_CONTAINER_DLL_remove (ahead, atail, cur);
249 allocator->bytes_alloced -= cur->bytes_alloced;
250 allocator->diff -= cur->bytes_alloced;
251 GNUNET_assert (allocator->bytes_alloced >= 0);
252 bytes_alloced -= cur->bytes_alloced;
253 GNUNET_assert (bytes_alloced >= 0);
260 MEMDEBUG_free_non_null (void * alloc, int line)
263 MEMDEBUG_free (alloc, line);
267 GNUNET_NETWORK_STRUCT_BEGIN
270 * Message a peer sends to another to indicate that it intends to
271 * setup a connection/session for data exchange. A 'SESSION_CONNECT'
272 * should be answered with a 'SESSION_CONNECT_ACK' with the same body
273 * to confirm. A 'SESSION_CONNECT_ACK' should then be followed with
274 * a 'SESSION_ACK'. Once the 'SESSION_ACK' is received, both peers
275 * should be connected.
277 struct SessionConnectMessage
280 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT'
281 * or 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK'
283 struct GNUNET_MessageHeader header;
288 uint32_t reserved GNUNET_PACKED;
291 * Absolute time at the sender. Only the most recent connect
292 * message implies which session is preferred by the sender.
294 struct GNUNET_TIME_AbsoluteNBO timestamp;
300 * Message we send to the other peer to notify him that we intentionally
301 * are disconnecting (to reduce timeouts). This is just a friendly
302 * notification, peers must not rely on always receiving disconnect
305 struct SessionDisconnectMessage
308 * Header of type 'GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT'
310 struct GNUNET_MessageHeader header;
315 uint32_t reserved GNUNET_PACKED;
318 * Purpose of the signature. Extends over the timestamp.
319 * Purpose should be GNUNET_SIGNATURE_PURPOSE_TRANSPORT_DISCONNECT.
321 struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
324 * Absolute time at the sender. Only the most recent connect
325 * message implies which session is preferred by the sender.
327 struct GNUNET_TIME_AbsoluteNBO timestamp;
330 * Public key of the sender.
332 struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded public_key;
335 * Signature of the peer that sends us the disconnect. Only
336 * valid if the timestamp is AFTER the timestamp from the
337 * corresponding 'CONNECT' message.
339 struct GNUNET_CRYPTO_EccSignature signature;
343 GNUNET_NETWORK_STRUCT_END
347 * For each neighbour we keep a list of messages
348 * that we still want to transmit to the neighbour.
354 * This is a doubly linked list.
356 struct MessageQueue *next;
359 * This is a doubly linked list.
361 struct MessageQueue *prev;
364 * Function to call once we're done.
366 GST_NeighbourSendContinuation cont;
374 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
375 * stuck together in memory. Allocated at the end of this struct.
377 const char *message_buf;
380 * Size of the message buf
382 size_t message_buf_size;
385 * At what time should we fail?
387 struct GNUNET_TIME_Absolute timeout;
393 * Possible state of a neighbour. Initially, we are S_NOT_CONNECTED.
395 * Then, there are two main paths. If we receive a CONNECT message, we
396 * first run a check against the blacklist (S_CONNECT_RECV_BLACKLIST_INBOUND).
397 * If this check is successful, we give the inbound address to ATS.
398 * After the check we ask ATS for a suggestion (S_CONNECT_RECV_ATS).
399 * If ATS makes a suggestion, we ALSO give that suggestion to the blacklist
400 * (S_CONNECT_RECV_BLACKLIST). Once the blacklist approves the
401 * address we got from ATS, we send our CONNECT_ACK and go to
402 * S_CONNECT_RECV_ACK. If we receive a SESSION_ACK, we go to
403 * S_CONNECTED (and notify everyone about the new connection). If the
404 * operation times out, we go to S_DISCONNECT.
406 * The other case is where we transmit a CONNECT message first. We
407 * start with S_INIT_ATS. If we get an address, we enter
408 * S_INIT_BLACKLIST and check the blacklist. If the blacklist is OK
409 * with the connection, we actually send the CONNECT message and go to
410 * state S_CONNECT_SENT. Once we receive a CONNECT_ACK, we go to
411 * S_CONNECTED (and notify everyone about the new connection and send
412 * back a SESSION_ACK). If the operation times out, we go to
415 * If the session is in trouble (i.e. transport-level disconnect or
416 * timeout), we go to S_RECONNECT_ATS where we ask ATS for a new
417 * address (we don't notify anyone about the disconnect yet). Once we
418 * have a new address, we go to S_RECONNECT_BLACKLIST to check the new
419 * address against the blacklist. If the blacklist approves, we enter
420 * S_RECONNECT_SENT and send a CONNECT message. If we receive a
421 * CONNECT_ACK, we go to S_CONNECTED and nobody noticed that we had
422 * trouble; we also send a SESSION_ACK at this time just in case. If
423 * the operation times out, we go to S_DISCONNECT (and notify everyone
424 * about the lost connection).
426 * If ATS decides to switch addresses while we have a normal
427 * connection, we go to S_CONNECTED_SWITCHING_BLACKLIST to check the
428 * new address against the blacklist. If the blacklist approves, we
429 * go to S_CONNECTED_SWITCHING_CONNECT_SENT and send a
430 * SESSION_CONNECT. If we get a SESSION_ACK back, we switch the
431 * primary connection to the suggested alternative from ATS, go back
432 * to S_CONNECTED and send a SESSION_ACK to the other peer just to be
433 * sure. If the operation times out (or the blacklist disapproves),
434 * we go to S_CONNECTED (and notify ATS that the given alternative
435 * address is "invalid").
437 * Once a session is in S_DISCONNECT, it is cleaned up and then goes
438 * to (S_DISCONNECT_FINISHED). If we receive an explicit disconnect
439 * request, we can go from any state to S_DISCONNECT, possibly after
440 * generating disconnect notifications.
442 * Note that it is quite possible that while we are in any of these
443 * states, we could receive a 'CONNECT' request from the other peer.
444 * We then enter a 'weird' state where we pursue our own primary state
445 * machine (as described above), but with the 'send_connect_ack' flag
446 * set to 1. If our state machine allows us to send a 'CONNECT_ACK'
447 * (because we have an acceptable address), we send the 'CONNECT_ACK'
448 * and set the 'send_connect_ack' to 2. If we then receive a
449 * 'SESSION_ACK', we go to 'S_CONNECTED' (and reset 'send_connect_ack'
456 * fresh peer or completely disconnected
461 * Asked to initiate connection, trying to get address from ATS
466 * Asked to initiate connection, trying to get address approved
472 * Sent CONNECT message to other peer, waiting for CONNECT_ACK
477 * Received a CONNECT, do a blacklist check for inbound address
479 S_CONNECT_RECV_BLACKLIST_INBOUND,
482 * Received a CONNECT, asking ATS about address suggestions.
487 * Received CONNECT from other peer, got an address, checking with blacklist.
489 S_CONNECT_RECV_BLACKLIST,
492 * CONNECT request from other peer was SESSION_ACK'ed, waiting for
498 * Got our CONNECT_ACK/SESSION_ACK, connection is up.
503 * Connection got into trouble, rest of the system still believes
504 * it to be up, but we're getting a new address from ATS.
509 * Connection got into trouble, rest of the system still believes
510 * it to be up; we are checking the new address against the blacklist.
512 S_RECONNECT_BLACKLIST,
515 * Sent CONNECT over new address (either by ATS telling us to switch
516 * addresses or from RECONNECT_ATS); if this fails, we need to tell
517 * the rest of the system about a disconnect.
522 * We have some primary connection, but ATS suggested we switch
523 * to some alternative; we're now checking the alternative against
526 S_CONNECTED_SWITCHING_BLACKLIST,
529 * We have some primary connection, but ATS suggested we switch
530 * to some alternative; we now sent a CONNECT message for the
531 * alternative session to the other peer and waiting for a
532 * CONNECT_ACK to make this our primary connection.
534 S_CONNECTED_SWITCHING_CONNECT_SENT,
537 * Disconnect in progress (we're sending the DISCONNECT message to the
538 * other peer; after that is finished, the state will be cleaned up).
543 * We're finished with the disconnect; and are cleaning up the state
544 * now! We put the struct into this state when we are really in the
545 * task that calls 'free' on it and are about to remove the record
546 * from the map. We should never find a 'struct NeighbourMapEntry'
547 * in this state in the map. Accessing a 'struct NeighbourMapEntry'
548 * in this state virtually always means using memory that has been
549 * freed (the exception being the cleanup code in 'free_neighbour').
551 S_DISCONNECT_FINISHED
556 * A possible address we could use to communicate with a neighbour.
558 struct NeighbourAddress
562 * Active session for this address.
564 struct Session *session;
567 * Network-level address information.
569 struct GNUNET_HELLO_Address *address;
572 * Timestamp of the 'SESSION_CONNECT' message we sent to the other
573 * peer for this address. Use to check that the ACK is in response
574 * to our most recent 'CONNECT'.
576 struct GNUNET_TIME_Absolute connect_timestamp;
579 * Inbound bandwidth from ATS for this address.
581 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
584 * Outbound bandwidth from ATS for this address.
586 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
589 * Did we tell ATS that this is our 'active' address?
597 * Entry in neighbours.
599 struct NeighbourMapEntry
603 * Head of list of messages we would like to send to this peer;
604 * must contain at most one message per client.
606 struct MessageQueue *messages_head;
609 * Tail of list of messages we would like to send to this peer; must
610 * contain at most one message per client.
612 struct MessageQueue *messages_tail;
615 * Are we currently trying to send a message? If so, which one?
617 struct MessageQueue *is_active;
620 * Primary address we currently use to communicate with the neighbour.
622 struct NeighbourAddress primary_address;
625 * Alternative address currently under consideration for communicating
626 * with the neighbour.
628 struct NeighbourAddress alternative_address;
631 * Identity of this neighbour.
633 struct GNUNET_PeerIdentity id;
636 * Main task that drives this peer (timeouts, keepalives, etc.).
637 * Always runs the 'master_task'.
639 GNUNET_SCHEDULER_TaskIdentifier task;
642 * At what time should we sent the next keep-alive message?
644 struct GNUNET_TIME_Absolute keep_alive_time;
647 * At what time did we sent the last keep-alive message? Used
648 * to calculate round-trip time ("latency").
650 struct GNUNET_TIME_Absolute last_keep_alive_time;
653 * Timestamp we should include in our next CONNECT_ACK message.
654 * (only valid if 'send_connect_ack' is GNUNET_YES). Used to build
655 * our CONNECT_ACK message.
657 struct GNUNET_TIME_Absolute connect_ack_timestamp;
660 * ATS address suggest handle
662 struct GNUNET_ATS_SuggestHandle *suggest_handle;
665 * Time where we should cut the connection (timeout) if we don't
666 * make progress in the state machine (or get a KEEPALIVE_RESPONSE
667 * if we are in S_CONNECTED).
669 struct GNUNET_TIME_Absolute timeout;
672 * Latest calculated latency value
674 struct GNUNET_TIME_Relative latency;
677 * Tracker for inbound bandwidth.
679 struct GNUNET_BANDWIDTH_Tracker in_tracker;
682 * How often has the other peer (recently) violated the inbound
683 * traffic limit? Incremented by 10 per violation, decremented by 1
684 * per non-violation (for each time interval).
686 unsigned int quota_violation_count;
689 * The current state of the peer.
694 * Did we sent an KEEP_ALIVE message and are we expecting a response?
696 int expect_latency_response;
699 * Flag to set if we still need to send a CONNECT_ACK message to the other peer
700 * (once we have an address to use and the peer has been allowed by our
701 * blacklist). Set to 1 if we need to send a CONNECT_ACK. Set to 2 if we
702 * did send a CONNECT_ACK and should go to 'S_CONNECTED' upon receiving
703 * a 'SESSION_ACK' (regardless of what our own state machine might say).
705 int send_connect_ack;
711 * Context for blacklist checks and the 'handle_test_blacklist_cont'
712 * function. Stores information about ongoing blacklist checks.
714 struct BlackListCheckContext
718 * We keep blacklist checks in a DLL.
720 struct BlackListCheckContext *next;
723 * We keep blacklist checks in a DLL.
725 struct BlackListCheckContext *prev;
728 * Address that is being checked.
730 struct NeighbourAddress na;
733 * Handle to the ongoing blacklist check.
735 struct GST_BlacklistCheck *bc;
740 * Hash map from peer identities to the respective 'struct NeighbourMapEntry'.
742 static struct GNUNET_CONTAINER_MultiHashMap *neighbours;
745 * We keep blacklist checks in a DLL so that we can find
746 * the 'sessions' in their 'struct NeighbourAddress' if
747 * a session goes down.
749 static struct BlackListCheckContext *bc_head;
752 * We keep blacklist checks in a DLL.
754 static struct BlackListCheckContext *bc_tail;
757 * Closure for connect_notify_cb, disconnect_notify_cb and address_change_cb
759 static void *callback_cls;
762 * Function to call when we connected to a neighbour.
764 static NotifyConnect connect_notify_cb;
767 * Function to call when we disconnected from a neighbour.
769 static GNUNET_TRANSPORT_NotifyDisconnect disconnect_notify_cb;
772 * Function to call when we changed an active address of a neighbour.
774 static GNUNET_TRANSPORT_PeerIterateCallback address_change_cb;
777 * counter for connected neighbours
779 static unsigned int neighbours_connected;
782 * Number of bytes we have currently queued for transmission.
784 static unsigned long long bytes_in_send_queue;
788 * Lookup a neighbour entry in the neighbours hash map.
790 * @param pid identity of the peer to look up
791 * @return the entry, NULL if there is no existing record
793 static struct NeighbourMapEntry *
794 lookup_neighbour (const struct GNUNET_PeerIdentity *pid)
796 if (NULL == neighbours)
798 return GNUNET_CONTAINER_multihashmap_get (neighbours, &pid->hashPubKey);
802 print_state (int state)
807 case S_NOT_CONNECTED:
808 return "S_NOT_CONNECTED";
811 case S_INIT_BLACKLIST:
812 return "S_INIT_BLACKLIST";
814 return "S_CONNECT_SENT";
815 case S_CONNECT_RECV_BLACKLIST_INBOUND:
816 return "S_CONNECT_RECV_BLACKLIST_INBOUND";
817 case S_CONNECT_RECV_ATS:
818 return "S_CONNECT_RECV_ATS";
819 case S_CONNECT_RECV_BLACKLIST:
820 return "S_CONNECT_RECV_BLACKLIST";
821 case S_CONNECT_RECV_ACK:
822 return "S_CONNECT_RECV_ACK";
824 return "S_CONNECTED";
825 case S_RECONNECT_ATS:
826 return "S_RECONNECT_ATS";
827 case S_RECONNECT_BLACKLIST:
828 return "S_RECONNECT_BLACKLIST";
829 case S_RECONNECT_SENT:
830 return "S_RECONNECT_SENT";
831 case S_CONNECTED_SWITCHING_BLACKLIST:
832 return "S_CONNECTED_SWITCHING_BLACKLIST";
833 case S_CONNECTED_SWITCHING_CONNECT_SENT:
834 return "S_CONNECTED_SWITCHING_CONNECT_SENT";
836 return "S_DISCONNECT";
837 case S_DISCONNECT_FINISHED:
838 return "S_DISCONNECT_FINISHED";
846 * Test if we're connected to the given peer.
848 * @param n neighbour entry of peer to test
849 * @return GNUNET_YES if we are connected, GNUNET_NO if not
852 test_connected (struct NeighbourMapEntry *n)
858 case S_NOT_CONNECTED:
860 case S_INIT_BLACKLIST:
862 case S_CONNECT_RECV_BLACKLIST_INBOUND:
863 case S_CONNECT_RECV_ATS:
864 case S_CONNECT_RECV_BLACKLIST:
865 case S_CONNECT_RECV_ACK:
868 case S_RECONNECT_ATS:
869 case S_RECONNECT_BLACKLIST:
870 case S_RECONNECT_SENT:
871 case S_CONNECTED_SWITCHING_BLACKLIST:
872 case S_CONNECTED_SWITCHING_CONNECT_SENT:
875 case S_DISCONNECT_FINISHED:
878 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
882 return GNUNET_SYSERR;
886 * Send information about a new outbound quota to our clients.
888 * @param target affected peer
889 * @param quota new quota
892 send_outbound_quota (const struct GNUNET_PeerIdentity *target,
893 struct GNUNET_BANDWIDTH_Value32NBO quota)
895 struct QuotaSetMessage q_msg;
897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
898 "Sending outbound quota of %u Bps for peer `%s' to all clients\n",
899 ntohl (quota.value__), GNUNET_i2s (target));
900 q_msg.header.size = htons (sizeof (struct QuotaSetMessage));
901 q_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
903 q_msg.peer = (*target);
904 GST_clients_broadcast (&q_msg.header, GNUNET_NO);
909 * We don't need a given neighbour address any more.
910 * Release its resources and give appropriate notifications
911 * to ATS and other subsystems.
913 * @param na address we are done with; 'na' itself must NOT be 'free'd, only the contents!
916 free_address (struct NeighbourAddress *na)
918 if (GNUNET_YES == na->ats_active)
920 GST_validation_set_address_use (na->address, na->session, GNUNET_NO, __LINE__);
921 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_NO);
922 address_change_cb (NULL, &na->address->peer, NULL);
925 na->ats_active = GNUNET_NO;
926 if (NULL != na->address)
928 MEMDEBUG_free (na->address, __LINE__);
929 //GNUNET_HELLO_address_free (na->address);
937 * Initialize the 'struct NeighbourAddress'.
939 * @param na neighbour address to initialize
940 * @param address address of the other peer, NULL if other peer
942 * @param session session to use (or NULL, in which case an
943 * address must be setup)
944 * @param bandwidth_in inbound quota to be used when connection is up
945 * @param bandwidth_out outbound quota to be used when connection is up
946 * @param is_active GNUNET_YES to mark this as the active address with ATS
949 set_address (struct NeighbourAddress *na,
950 const struct GNUNET_HELLO_Address *address,
951 struct Session *session,
952 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
953 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
956 struct GNUNET_TRANSPORT_PluginFunctions *papi;
957 if (NULL == (papi = GST_plugins_find (address->transport_name)))
962 if (session == na->session)
964 na->bandwidth_in = bandwidth_in;
965 na->bandwidth_out = bandwidth_out;
966 if (is_active != na->ats_active)
968 na->ats_active = is_active;
969 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, is_active);
970 GST_validation_set_address_use (na->address, na->session, is_active, __LINE__);
972 address_change_cb (NULL, &address->peer, address);
974 if (GNUNET_YES == is_active)
976 /* FIXME: is this the right place to set quotas? */
977 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
978 send_outbound_quota (&address->peer, bandwidth_out);
984 session = papi->get_session (papi->cls, address);
987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
988 "Failed to obtain new session for peer `%s' and address '%s'\n",
989 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
990 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
993 na->address = GNUNET_HELLO_address_copy (address);
994 MEMDEBUG_add_alloc (na->address, GNUNET_HELLO_address_get_size (na->address), __LINE__);
995 na->bandwidth_in = bandwidth_in;
996 na->bandwidth_out = bandwidth_out;
997 na->session = session;
998 na->ats_active = is_active;
999 if (GNUNET_YES == is_active)
1001 /* Telling ATS about new session */
1002 GNUNET_ATS_address_in_use (GST_ats, na->address, na->session, GNUNET_YES);
1003 GST_validation_set_address_use (na->address, na->session, GNUNET_YES, __LINE__);
1004 address_change_cb (NULL, &address->peer, address);
1005 /* FIXME: is this the right place to set quotas? */
1006 GST_neighbours_set_incoming_quota (&address->peer, bandwidth_in);
1007 send_outbound_quota (&address->peer, bandwidth_out);
1013 * Free a neighbour map entry.
1015 * @param n entry to free
1016 * @param keep_sessions GNUNET_NO to tell plugin to terminate sessions,
1017 * GNUNET_YES to keep all sessions
1020 free_neighbour (struct NeighbourMapEntry *n, int keep_sessions)
1022 struct MessageQueue *mq;
1023 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1024 struct GNUNET_HELLO_Address *backup_primary;
1026 n->is_active = NULL; /* always free'd by its own continuation! */
1028 /* fail messages currently in the queue */
1029 while (NULL != (mq = n->messages_head))
1031 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1032 if (NULL != mq->cont)
1033 mq->cont (mq->cont_cls, GNUNET_SYSERR, mq->message_buf_size, 0);
1034 MEMDEBUG_free (mq, __LINE__);
1036 /* It is too late to send other peer disconnect notifications, but at
1037 least internally we need to get clean... */
1038 if (GNUNET_YES == test_connected (n))
1040 GNUNET_STATISTICS_set (GST_stats,
1041 gettext_noop ("# peers connected"),
1042 --neighbours_connected,
1044 disconnect_notify_cb (callback_cls, &n->id);
1047 n->state = S_DISCONNECT_FINISHED;
1049 if (NULL != n->primary_address.address)
1051 backup_primary = GNUNET_HELLO_address_copy(n->primary_address.address);
1052 MEMDEBUG_add_alloc (backup_primary, GNUNET_HELLO_address_get_size(backup_primary), __LINE__);
1055 backup_primary = NULL;
1057 /* free addresses and mark as unused */
1058 free_address (&n->primary_address);
1059 free_address (&n->alternative_address);
1061 /* FIXME-PLUGIN-API: This does not seem to guarantee that all
1062 transport sessions eventually get killed due to inactivity; they
1063 MUST have their own timeout logic (but at least TCP doesn't have
1064 one yet). Are we sure that EVERY 'session' of a plugin is
1065 actually cleaned up this way!? Note that if we are switching
1066 between two TCP sessions to the same peer, the existing plugin
1067 API gives us not even the means to selectively kill only one of
1068 them! Killing all sessions like this seems to be very, very
1071 /* cut transport-level connection */
1072 if ((GNUNET_NO == keep_sessions) &&
1073 (NULL != backup_primary) &&
1074 (NULL != (papi = GST_plugins_find (backup_primary->transport_name))))
1075 papi->disconnect (papi->cls, &n->id);
1077 MEMDEBUG_free_non_null (backup_primary, __LINE__);
1079 GNUNET_assert (GNUNET_YES ==
1080 GNUNET_CONTAINER_multihashmap_remove (neighbours,
1081 &n->id.hashPubKey, n));
1083 // FIXME-ATS-API: we might want to be more specific about
1084 // which states we do this from in the future (ATS should
1085 // have given us a 'suggest_address' handle, and if we have
1086 // such a handle, we should cancel the operation here!
1087 if (NULL != n->suggest_handle)
1089 GNUNET_ATS_suggest_address_cancel (GST_ats, &n->id);
1090 n->suggest_handle = NULL;
1093 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1095 GNUNET_SCHEDULER_cancel (n->task);
1096 n->task = GNUNET_SCHEDULER_NO_TASK;
1098 /* free rest of memory */
1099 MEMDEBUG_free (n, __LINE__);
1103 * Transmit a message using the current session of the given
1106 * @param n entry for the recipient
1107 * @param msgbuf buffer to transmit
1108 * @param msgbuf_size number of bytes in buffer
1109 * @param priority transmission priority
1110 * @param timeout transmission timeout
1111 * @param cont continuation to call when finished (can be NULL)
1112 * @param cont_cls closure for cont
1115 send_with_session (struct NeighbourMapEntry *n,
1116 const char *msgbuf, size_t msgbuf_size,
1118 struct GNUNET_TIME_Relative timeout,
1119 GNUNET_TRANSPORT_TransmitContinuation cont,
1122 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1124 GNUNET_assert (n->primary_address.session != NULL);
1125 if ( ((NULL == (papi = GST_plugins_find (n->primary_address.address->transport_name)) ||
1126 (-1 == papi->send (papi->cls,
1127 n->primary_address.session,
1128 msgbuf, msgbuf_size,
1131 cont, cont_cls)))) &&
1133 cont (cont_cls, &n->id, GNUNET_SYSERR, msgbuf_size, 0);
1134 GNUNET_break (NULL != papi);
1139 * Master task run for every neighbour. Performs all of the time-related
1140 * activities (keep alive, send next message, disconnect if idle, finish
1141 * clean up after disconnect).
1143 * @param cls the 'struct NeighbourMapEntry' for which we are running
1144 * @param tc scheduler context (unused)
1147 master_task (void *cls,
1148 const struct GNUNET_SCHEDULER_TaskContext *tc);
1152 * Function called when the 'DISCONNECT' message has been sent by the
1153 * plugin. Frees the neighbour --- if the entry still exists.
1156 * @param target identity of the neighbour that was disconnected
1157 * @param result GNUNET_OK if the disconnect got out successfully
1158 * @param payload bytes payload
1159 * @param physical bytes physical
1162 send_disconnect_cont (void *cls, const struct GNUNET_PeerIdentity *target,
1163 int result, size_t payload, size_t physical)
1165 struct NeighbourMapEntry *n;
1167 n = lookup_neighbour (target);
1169 return; /* already gone */
1170 if (S_DISCONNECT != n->state)
1171 return; /* have created a fresh entry since */
1172 n->state = S_DISCONNECT;
1173 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1174 GNUNET_SCHEDULER_cancel (n->task);
1175 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1180 * Transmit a DISCONNECT message to the other peer.
1182 * @param n neighbour to send DISCONNECT message.
1185 send_disconnect (struct NeighbourMapEntry *n)
1187 struct SessionDisconnectMessage disconnect_msg;
1189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1190 "Sending DISCONNECT message to peer `%4s'\n",
1191 GNUNET_i2s (&n->id));
1192 disconnect_msg.header.size = htons (sizeof (struct SessionDisconnectMessage));
1193 disconnect_msg.header.type =
1194 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1195 disconnect_msg.reserved = htonl (0);
1196 disconnect_msg.purpose.size =
1197 htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
1198 sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded) +
1199 sizeof (struct GNUNET_TIME_AbsoluteNBO));
1200 disconnect_msg.purpose.purpose =
1201 htonl (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT);
1202 disconnect_msg.timestamp =
1203 GNUNET_TIME_absolute_hton (GNUNET_TIME_absolute_get ());
1204 disconnect_msg.public_key = GST_my_public_key;
1205 GNUNET_assert (GNUNET_OK ==
1206 GNUNET_CRYPTO_ecc_sign (GST_my_private_key,
1207 &disconnect_msg.purpose,
1208 &disconnect_msg.signature));
1210 send_with_session (n,
1211 (const char *) &disconnect_msg, sizeof (disconnect_msg),
1212 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
1213 &send_disconnect_cont, NULL);
1214 GNUNET_STATISTICS_update (GST_stats,
1216 ("# DISCONNECT messages sent"), 1,
1222 * Disconnect from the given neighbour, clean up the record.
1224 * @param n neighbour to disconnect from
1227 disconnect_neighbour (struct NeighbourMapEntry *n)
1229 /* depending on state, notify neighbour and/or upper layers of this peer
1233 case S_NOT_CONNECTED:
1235 case S_INIT_BLACKLIST:
1236 /* other peer is completely unaware of us, no need to send DISCONNECT */
1237 n->state = S_DISCONNECT_FINISHED;
1238 free_neighbour (n, GNUNET_NO);
1240 case S_CONNECT_SENT:
1241 send_disconnect (n);
1242 n->state = S_DISCONNECT;
1244 case S_CONNECT_RECV_BLACKLIST_INBOUND:
1245 case S_CONNECT_RECV_ATS:
1246 case S_CONNECT_RECV_BLACKLIST:
1247 /* we never ACK'ed the other peer's request, no need to send DISCONNECT */
1248 n->state = S_DISCONNECT_FINISHED;
1249 free_neighbour (n, GNUNET_NO);
1251 case S_CONNECT_RECV_ACK:
1252 /* we DID ACK the other peer's request, must send DISCONNECT */
1253 send_disconnect (n);
1254 n->state = S_DISCONNECT;
1257 case S_RECONNECT_BLACKLIST:
1258 case S_RECONNECT_SENT:
1259 case S_CONNECTED_SWITCHING_BLACKLIST:
1260 case S_CONNECTED_SWITCHING_CONNECT_SENT:
1261 /* we are currently connected, need to send disconnect and do
1262 internal notifications and update statistics */
1263 send_disconnect (n);
1264 GNUNET_STATISTICS_set (GST_stats,
1265 gettext_noop ("# peers connected"),
1266 --neighbours_connected,
1268 disconnect_notify_cb (callback_cls, &n->id);
1269 n->state = S_DISCONNECT;
1271 case S_RECONNECT_ATS:
1272 /* ATS address request timeout, disconnect without sending disconnect message */
1273 GNUNET_STATISTICS_set (GST_stats,
1274 gettext_noop ("# peers connected"),
1275 --neighbours_connected,
1277 disconnect_notify_cb (callback_cls, &n->id);
1278 n->state = S_DISCONNECT;
1281 /* already disconnected, ignore */
1283 case S_DISCONNECT_FINISHED:
1284 /* already cleaned up, how did we get here!? */
1288 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
1292 /* schedule timeout to clean up */
1293 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1294 GNUNET_SCHEDULER_cancel (n->task);
1295 n->task = GNUNET_SCHEDULER_add_delayed (DISCONNECT_SENT_TIMEOUT,
1301 * We're done with our transmission attempt, continue processing.
1303 * @param cls the 'struct MessageQueue' of the message
1304 * @param receiver intended receiver
1305 * @param success whether it worked or not
1306 * @param size_payload bytes payload sent
1307 * @param physical bytes sent on wire
1310 transmit_send_continuation (void *cls,
1311 const struct GNUNET_PeerIdentity *receiver,
1312 int success, size_t size_payload, size_t physical)
1314 struct MessageQueue *mq = cls;
1315 struct NeighbourMapEntry *n;
1317 if (NULL == (n = lookup_neighbour (receiver)))
1319 MEMDEBUG_free (mq, __LINE__);
1320 return; /* disconnect or other error while transmitting, can happen */
1322 if (n->is_active == mq)
1324 /* this is still "our" neighbour, remove us from its queue
1325 and allow it to send the next message now */
1326 n->is_active = NULL;
1327 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1328 GNUNET_SCHEDULER_cancel (n->task);
1329 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1331 if (bytes_in_send_queue < mq->message_buf_size)
1333 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1334 "Bytes_in_send_queue `%u', Message_size %u, result: %s, payload %u, on wire %u\n",
1335 bytes_in_send_queue, mq->message_buf_size,
1336 (GNUNET_OK == success) ? "OK" : "FAIL",
1337 size_payload, physical);
1342 GNUNET_break (size_payload == mq->message_buf_size);
1343 bytes_in_send_queue -= mq->message_buf_size;
1344 GNUNET_STATISTICS_set (GST_stats,
1346 ("# bytes in message queue for other peers"),
1347 bytes_in_send_queue, GNUNET_NO);
1348 if (GNUNET_OK == success)
1349 GNUNET_STATISTICS_update (GST_stats,
1351 ("# messages transmitted to other peers"),
1354 GNUNET_STATISTICS_update (GST_stats,
1356 ("# transmission failures for messages to other peers"),
1358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1359 "Sending message to `%s' of type %u was a %s\n",
1360 GNUNET_i2s (receiver),
1361 ntohs (((struct GNUNET_MessageHeader *) mq->message_buf)->type),
1362 (success == GNUNET_OK) ? "success" : "FAILURE");
1363 if (NULL != mq->cont)
1364 mq->cont (mq->cont_cls, success, size_payload, physical);
1365 MEMDEBUG_free (mq, __LINE__);
1370 * Check the message list for the given neighbour and if we can
1371 * send a message, do so. This function should only be called
1372 * if the connection is at least generally ready for transmission.
1373 * While we will only send one message at a time, no bandwidth
1374 * quota management is performed here. If a message was given to
1375 * the plugin, the continuation will automatically re-schedule
1376 * the 'master' task once the next message might be transmitted.
1378 * @param n target peer for which to transmit
1381 try_transmission_to_peer (struct NeighbourMapEntry *n)
1383 struct MessageQueue *mq;
1384 struct GNUNET_TIME_Relative timeout;
1386 if (NULL == n->primary_address.address)
1388 /* no address, why are we here? */
1392 if ((0 == n->primary_address.address->address_length) &&
1393 (NULL == n->primary_address.session))
1395 /* no address, why are we here? */
1399 if (NULL != n->is_active)
1401 /* transmission already pending */
1405 /* timeout messages from the queue that are past their due date */
1406 while (NULL != (mq = n->messages_head))
1408 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1409 if (timeout.rel_value > 0)
1411 GNUNET_STATISTICS_update (GST_stats,
1413 ("# messages timed out while in transport queue"),
1415 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1417 transmit_send_continuation (mq, &n->id, GNUNET_SYSERR, mq->message_buf_size, 0); /* timeout */
1420 return; /* no more messages */
1421 GNUNET_CONTAINER_DLL_remove (n->messages_head, n->messages_tail, mq);
1423 send_with_session (n,
1424 mq->message_buf, mq->message_buf_size,
1425 0 /* priority */, timeout,
1426 &transmit_send_continuation, mq);
1431 * Send keepalive message to the neighbour. Must only be called
1432 * if we are on 'connected' state or while trying to switch addresses.
1433 * Will internally determine if a keepalive is truly needed (so can
1434 * always be called).
1436 * @param n neighbour that went idle and needs a keepalive
1439 send_keepalive (struct NeighbourMapEntry *n)
1441 struct GNUNET_MessageHeader m;
1443 GNUNET_assert ((S_CONNECTED == n->state) ||
1444 (S_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
1445 (S_CONNECTED_SWITCHING_CONNECT_SENT));
1446 if (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time).rel_value > 0)
1447 return; /* no keepalive needed at this time */
1448 m.size = htons (sizeof (struct GNUNET_MessageHeader));
1449 m.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE);
1450 send_with_session (n,
1451 (const void *) &m, sizeof (m),
1452 UINT32_MAX /* priority */,
1453 KEEPALIVE_FREQUENCY,
1455 GNUNET_STATISTICS_update (GST_stats, gettext_noop ("# keepalives sent"), 1,
1457 n->expect_latency_response = GNUNET_YES;
1458 n->last_keep_alive_time = GNUNET_TIME_absolute_get ();
1459 n->keep_alive_time = GNUNET_TIME_relative_to_absolute (KEEPALIVE_FREQUENCY);
1464 * Keep the connection to the given neighbour alive longer,
1465 * we received a KEEPALIVE (or equivalent); send a response.
1467 * @param neighbour neighbour to keep alive (by sending keep alive response)
1470 GST_neighbours_keepalive (const struct GNUNET_PeerIdentity *neighbour)
1472 struct NeighbourMapEntry *n;
1473 struct GNUNET_MessageHeader m;
1475 if (NULL == (n = lookup_neighbour (neighbour)))
1477 GNUNET_STATISTICS_update (GST_stats,
1479 ("# KEEPALIVE messages discarded (peer unknown)"),
1483 if (NULL == n->primary_address.session)
1485 GNUNET_STATISTICS_update (GST_stats,
1487 ("# KEEPALIVE messages discarded (no session)"),
1491 /* send reply to allow neighbour to measure latency */
1492 m.size = htons (sizeof (struct GNUNET_MessageHeader));
1493 m.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_KEEPALIVE_RESPONSE);
1494 send_with_session(n,
1495 (const void *) &m, sizeof (m),
1496 UINT32_MAX /* priority */,
1497 KEEPALIVE_FREQUENCY,
1503 * We received a KEEP_ALIVE_RESPONSE message and use this to calculate
1504 * latency to this peer. Pass the updated information (existing ats
1505 * plus calculated latency) to ATS.
1507 * @param neighbour neighbour to keep alive
1510 GST_neighbours_keepalive_response (const struct GNUNET_PeerIdentity *neighbour)
1512 struct NeighbourMapEntry *n;
1514 struct GNUNET_ATS_Information ats;
1516 if (NULL == (n = lookup_neighbour (neighbour)))
1518 GNUNET_STATISTICS_update (GST_stats,
1520 ("# KEEPALIVE_RESPONSE messages discarded (not connected)"),
1524 if ( (S_CONNECTED != n->state) ||
1525 (GNUNET_YES != n->expect_latency_response) )
1527 GNUNET_STATISTICS_update (GST_stats,
1529 ("# KEEPALIVE_RESPONSE messages discarded (not expected)"),
1533 n->expect_latency_response = GNUNET_NO;
1534 n->latency = GNUNET_TIME_absolute_get_duration (n->last_keep_alive_time);
1535 n->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1537 "Latency for peer `%s' is %llu ms\n",
1538 GNUNET_i2s (&n->id), n->latency.rel_value);
1539 /* append latency */
1540 ats.type = htonl (GNUNET_ATS_QUALITY_NET_DELAY);
1541 if (n->latency.rel_value > UINT32_MAX)
1542 latency = UINT32_MAX;
1544 latency = n->latency.rel_value;
1545 ats.value = htonl (latency);
1546 GST_ats_update_metrics (&n->id,
1547 n->primary_address.address,
1548 n->primary_address.session,
1554 * We have received a message from the given sender. How long should
1555 * we delay before receiving more? (Also used to keep the peer marked
1558 * @param sender sender of the message
1559 * @param size size of the message
1560 * @param do_forward set to GNUNET_YES if the message should be forwarded to clients
1561 * GNUNET_NO if the neighbour is not connected or violates the quota,
1562 * GNUNET_SYSERR if the connection is not fully up yet
1563 * @return how long to wait before reading more from this sender
1565 struct GNUNET_TIME_Relative
1566 GST_neighbours_calculate_receive_delay (const struct GNUNET_PeerIdentity
1567 *sender, ssize_t size, int *do_forward)
1569 struct NeighbourMapEntry *n;
1570 struct GNUNET_TIME_Relative ret;
1572 if (NULL == neighbours)
1574 *do_forward = GNUNET_NO;
1575 return GNUNET_TIME_UNIT_FOREVER_REL; /* This can happen during shutdown */
1577 if (NULL == (n = lookup_neighbour (sender)))
1579 GST_neighbours_try_connect (sender);
1580 if (NULL == (n = lookup_neighbour (sender)))
1582 GNUNET_STATISTICS_update (GST_stats,
1584 ("# messages discarded due to lack of neighbour record"),
1586 *do_forward = GNUNET_NO;
1587 return GNUNET_TIME_UNIT_ZERO;
1590 if (! test_connected (n))
1592 *do_forward = GNUNET_SYSERR;
1593 return GNUNET_TIME_UNIT_ZERO;
1595 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, size))
1597 n->quota_violation_count++;
1598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1599 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
1600 n->in_tracker.available_bytes_per_s__,
1601 n->quota_violation_count);
1602 /* Discount 32k per violation */
1603 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, -32 * 1024);
1607 if (n->quota_violation_count > 0)
1609 /* try to add 32k back */
1610 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker, 32 * 1024);
1611 n->quota_violation_count--;
1614 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
1616 GNUNET_STATISTICS_update (GST_stats,
1618 ("# bandwidth quota violations by other peers"),
1620 *do_forward = GNUNET_NO;
1621 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
1623 *do_forward = GNUNET_YES;
1624 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 32 * 1024);
1625 if (ret.rel_value > 0)
1627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1628 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
1629 (unsigned long long) n->in_tracker.
1630 consumption_since_last_update__,
1631 (unsigned int) n->in_tracker.available_bytes_per_s__,
1632 (unsigned long long) ret.rel_value);
1633 GNUNET_STATISTICS_update (GST_stats,
1634 gettext_noop ("# ms throttling suggested"),
1635 (int64_t) ret.rel_value, GNUNET_NO);
1642 * Transmit a message to the given target using the active connection.
1644 * @param target destination
1645 * @param msg message to send
1646 * @param msg_size number of bytes in msg
1647 * @param timeout when to fail with timeout
1648 * @param cont function to call when done
1649 * @param cont_cls closure for 'cont'
1652 GST_neighbours_send (const struct GNUNET_PeerIdentity *target, const void *msg,
1653 size_t msg_size, struct GNUNET_TIME_Relative timeout,
1654 GST_NeighbourSendContinuation cont, void *cont_cls)
1656 struct NeighbourMapEntry *n;
1657 struct MessageQueue *mq;
1659 /* All ove these cases should never happen; they are all API violations.
1660 But we check anyway, just to be sure. */
1661 if (NULL == (n = lookup_neighbour (target)))
1665 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1668 if (GNUNET_YES != test_connected (n))
1672 cont (cont_cls, GNUNET_SYSERR, msg_size, 0);
1675 bytes_in_send_queue += msg_size;
1676 GNUNET_STATISTICS_set (GST_stats,
1678 ("# bytes in message queue for other peers"),
1679 bytes_in_send_queue, GNUNET_NO);
1680 mq = MEMDEBUG_malloc (sizeof (struct MessageQueue) + msg_size, __LINE__);
1682 mq->cont_cls = cont_cls;
1683 memcpy (&mq[1], msg, msg_size);
1684 mq->message_buf = (const char *) &mq[1];
1685 mq->message_buf_size = msg_size;
1686 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1687 GNUNET_CONTAINER_DLL_insert_tail (n->messages_head, n->messages_tail, mq);
1688 if ( (NULL != n->is_active) ||
1689 ( (NULL == n->primary_address.session) && (NULL == n->primary_address.address)) )
1691 if (GNUNET_SCHEDULER_NO_TASK != n->task)
1692 GNUNET_SCHEDULER_cancel (n->task);
1693 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1698 * Send a SESSION_CONNECT message via the given address.
1700 * @param na address to use
1703 send_session_connect (struct NeighbourAddress *na)
1705 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1706 struct SessionConnectMessage connect_msg;
1708 if (NULL == (papi = GST_plugins_find (na->address->transport_name)))
1713 if (NULL == na->session)
1714 na->session = papi->get_session (papi->cls, na->address);
1715 if (NULL == na->session)
1720 na->connect_timestamp = GNUNET_TIME_absolute_get ();
1721 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1722 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT);
1723 connect_msg.reserved = htonl (0);
1724 connect_msg.timestamp = GNUNET_TIME_absolute_hton (na->connect_timestamp);
1725 (void) papi->send (papi->cls,
1727 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1729 GNUNET_TIME_UNIT_FOREVER_REL,
1736 * Send a SESSION_CONNECT_ACK message via the given address.
1738 * @param address address to use
1739 * @param session session to use
1740 * @param timestamp timestamp to use for the ACK message
1743 send_session_connect_ack_message (const struct GNUNET_HELLO_Address *address,
1744 struct Session *session,
1745 struct GNUNET_TIME_Absolute timestamp)
1747 struct GNUNET_TRANSPORT_PluginFunctions *papi;
1748 struct SessionConnectMessage connect_msg;
1750 if (NULL == (papi = GST_plugins_find (address->transport_name)))
1755 if (NULL == session)
1756 session = papi->get_session (papi->cls, address);
1757 if (NULL == session)
1762 connect_msg.header.size = htons (sizeof (struct SessionConnectMessage));
1763 connect_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_CONNECT_ACK);
1764 connect_msg.reserved = htonl (0);
1765 connect_msg.timestamp = GNUNET_TIME_absolute_hton (timestamp);
1766 (void) papi->send (papi->cls,
1768 (const char *) &connect_msg, sizeof (struct SessionConnectMessage),
1770 GNUNET_TIME_UNIT_FOREVER_REL,
1777 * Create a fresh entry in the neighbour map for the given peer
1779 * @param peer peer to create an entry for
1780 * @return new neighbour map entry
1782 static struct NeighbourMapEntry *
1783 setup_neighbour (const struct GNUNET_PeerIdentity *peer)
1785 struct NeighbourMapEntry *n;
1787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1788 "Creating new neighbour entry for `%s'\n",
1790 n = MEMDEBUG_malloc (sizeof (struct NeighbourMapEntry), __LINE__);
1792 n->state = S_NOT_CONNECTED;
1793 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
1794 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
1795 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
1796 MAX_BANDWIDTH_CARRY_S);
1797 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
1798 GNUNET_assert (GNUNET_OK ==
1799 GNUNET_CONTAINER_multihashmap_put (neighbours,
1800 &n->id.hashPubKey, n,
1801 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
1807 * Check if the two given addresses are the same.
1808 * Actually only checks if the sessions are non-NULL
1809 * (which they should be) and then if they are identical;
1810 * the actual addresses don't matter if the session
1811 * pointers match anyway, and we must have session pointers
1814 * @param a1 first address to compare
1815 * @param a2 other address to compare
1816 * @return GNUNET_NO if the addresses do not match, GNUNET_YES if they do match
1819 address_matches (const struct NeighbourAddress *a1,
1820 const struct NeighbourAddress *a2)
1822 if ( (NULL == a1->session) ||
1823 (NULL == a2->session) )
1828 return (a1->session == a2->session) ? GNUNET_YES : GNUNET_NO;
1833 * Try to create a connection to the given target (eventually).
1835 * @param target peer to try to connect to
1838 GST_neighbours_try_connect (const struct GNUNET_PeerIdentity *target)
1840 struct NeighbourMapEntry *n;
1842 if (NULL == neighbours)
1844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1845 "Asked to connect to peer `%s' during shutdown\n",
1846 GNUNET_i2s (target));
1847 return; /* during shutdown, do nothing */
1849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1850 "Asked to connect to peer `%s'\n",
1851 GNUNET_i2s (target));
1852 if (0 == memcmp (target, &GST_my_identity, sizeof (struct GNUNET_PeerIdentity)))
1854 /* refuse to connect to myself */
1855 /* FIXME: can this happen? Is this not an API violation? */
1856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1857 "Refusing to try to connect to myself.\n");
1860 n = lookup_neighbour (target);
1865 case S_NOT_CONNECTED:
1866 /* this should not be possible */
1868 free_neighbour (n, GNUNET_NO);
1871 case S_INIT_BLACKLIST:
1872 case S_CONNECT_SENT:
1873 case S_CONNECT_RECV_BLACKLIST_INBOUND:
1874 case S_CONNECT_RECV_ATS:
1875 case S_CONNECT_RECV_BLACKLIST:
1876 case S_CONNECT_RECV_ACK:
1877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1878 "Ignoring request to try to connect to `%s', already trying!\n",
1879 GNUNET_i2s (target));
1880 return; /* already trying */
1882 case S_RECONNECT_ATS:
1883 case S_RECONNECT_BLACKLIST:
1884 case S_RECONNECT_SENT:
1885 case S_CONNECTED_SWITCHING_BLACKLIST:
1886 case S_CONNECTED_SWITCHING_CONNECT_SENT:
1887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1888 "Ignoring request to try to connect, already connected to `%s'!\n",
1889 GNUNET_i2s (target));
1890 return; /* already connected */
1892 /* get rid of remains, ready to re-try immediately */
1893 free_neighbour (n, GNUNET_NO);
1895 case S_DISCONNECT_FINISHED:
1896 /* should not be possible */
1899 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
1901 free_neighbour (n, GNUNET_NO);
1905 n = setup_neighbour (target);
1906 n->state = S_INIT_ATS;
1907 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
1909 GNUNET_ATS_reset_backoff (GST_ats, target);
1910 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, target);
1915 * Function called with the result of a blacklist check.
1917 * @param cls closure with the 'struct BlackListCheckContext'
1918 * @param peer peer this check affects
1919 * @param result GNUNET_OK if the address is allowed
1922 handle_test_blacklist_cont (void *cls,
1923 const struct GNUNET_PeerIdentity *peer,
1926 struct BlackListCheckContext *bcc = cls;
1927 struct NeighbourMapEntry *n;
1930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1931 "Connection to new address of peer `%s' based on blacklist is `%s'\n",
1933 (GNUNET_OK == result) ? "allowed" : "FORBIDDEN");
1934 if (NULL == (n = lookup_neighbour (peer)))
1935 goto cleanup; /* nobody left to care about new address */
1938 case S_NOT_CONNECTED:
1939 /* this should not be possible */
1941 free_neighbour (n, GNUNET_NO);
1944 /* still waiting on ATS suggestion */
1946 case S_INIT_BLACKLIST:
1947 /* check if the address the blacklist was fine with matches
1948 ATS suggestion, if so, we can move on! */
1949 if ( (GNUNET_OK == result) &&
1950 (1 == n->send_connect_ack) )
1952 n->send_connect_ack = 2;
1953 send_session_connect_ack_message (bcc->na.address,
1955 n->connect_ack_timestamp);
1957 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
1958 break; /* result for an address we currently don't care about */
1959 if (GNUNET_OK == result)
1961 n->timeout = GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT);
1962 n->state = S_CONNECT_SENT;
1963 send_session_connect (&n->primary_address);
1967 // FIXME: should also possibly destroy session with plugin!?
1968 GNUNET_ATS_address_destroyed (GST_ats,
1971 free_address (&n->primary_address);
1972 n->state = S_INIT_ATS;
1973 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
1974 // FIXME: do we need to ask ATS again for suggestions?
1975 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
1978 case S_CONNECT_SENT:
1979 /* waiting on CONNECT_ACK, send ACK if one is pending */
1980 if ( (GNUNET_OK == result) &&
1981 (1 == n->send_connect_ack) )
1983 n->send_connect_ack = 2;
1984 send_session_connect_ack_message (n->primary_address.address,
1985 n->primary_address.session,
1986 n->connect_ack_timestamp);
1989 case S_CONNECT_RECV_BLACKLIST_INBOUND:
1990 if (GNUNET_OK == result)
1991 GST_ats_add_address (bcc->na.address, bcc->na.session);
1993 n->state = S_CONNECT_RECV_ATS;
1994 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
1995 GNUNET_ATS_reset_backoff (GST_ats, peer);
1996 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer);
1998 case S_CONNECT_RECV_ATS:
1999 /* still waiting on ATS suggestion, don't care about blacklist */
2001 case S_CONNECT_RECV_BLACKLIST:
2002 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2003 break; /* result for an address we currently don't care about */
2004 if (GNUNET_OK == result)
2006 n->timeout = GNUNET_TIME_relative_to_absolute (SETUP_CONNECTION_TIMEOUT);
2007 n->state = S_CONNECT_RECV_ACK;
2008 send_session_connect_ack_message (bcc->na.address,
2010 n->connect_ack_timestamp);
2011 if (1 == n->send_connect_ack)
2012 n->send_connect_ack = 2;
2016 // FIXME: should also possibly destroy session with plugin!?
2017 GNUNET_ATS_address_destroyed (GST_ats,
2020 free_address (&n->primary_address);
2021 n->state = S_INIT_ATS;
2022 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
2023 // FIXME: do we need to ask ATS again for suggestions?
2024 GNUNET_ATS_reset_backoff (GST_ats, peer);
2025 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
2028 case S_CONNECT_RECV_ACK:
2029 /* waiting on SESSION_ACK, send ACK if one is pending */
2030 if ( (GNUNET_OK == result) &&
2031 (1 == n->send_connect_ack) )
2033 n->send_connect_ack = 2;
2034 send_session_connect_ack_message (n->primary_address.address,
2035 n->primary_address.session,
2036 n->connect_ack_timestamp);
2040 /* already connected, don't care about blacklist */
2042 case S_RECONNECT_ATS:
2043 /* still waiting on ATS suggestion, don't care about blacklist */
2045 case S_RECONNECT_BLACKLIST:
2046 if ( (GNUNET_OK == result) &&
2047 (1 == n->send_connect_ack) )
2049 n->send_connect_ack = 2;
2050 send_session_connect_ack_message (bcc->na.address,
2052 n->connect_ack_timestamp);
2054 if (GNUNET_YES != address_matches (&bcc->na, &n->primary_address))
2055 break; /* result for an address we currently don't care about */
2056 if (GNUNET_OK == result)
2058 send_session_connect (&n->primary_address);
2059 n->timeout = GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT);
2060 n->state = S_RECONNECT_SENT;
2064 GNUNET_ATS_address_destroyed (GST_ats,
2067 n->state = S_RECONNECT_ATS;
2068 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
2069 // FIXME: do we need to ask ATS again for suggestions?
2070 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
2073 case S_RECONNECT_SENT:
2074 /* waiting on CONNECT_ACK, don't care about blacklist */
2075 if ( (GNUNET_OK == result) &&
2076 (1 == n->send_connect_ack) )
2078 n->send_connect_ack = 2;
2079 send_session_connect_ack_message (n->primary_address.address,
2080 n->primary_address.session,
2081 n->connect_ack_timestamp);
2084 case S_CONNECTED_SWITCHING_BLACKLIST:
2085 if (GNUNET_YES != address_matches (&bcc->na, &n->alternative_address))
2086 break; /* result for an address we currently don't care about */
2087 if (GNUNET_OK == result)
2089 send_session_connect (&n->alternative_address);
2090 n->state = S_CONNECTED_SWITCHING_CONNECT_SENT;
2094 GNUNET_ATS_address_destroyed (GST_ats,
2097 free_address (&n->alternative_address);
2098 n->state = S_CONNECTED;
2101 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2102 /* waiting on CONNECT_ACK, don't care about blacklist */
2103 if ( (GNUNET_OK == result) &&
2104 (1 == n->send_connect_ack) )
2106 n->send_connect_ack = 2;
2107 send_session_connect_ack_message (n->primary_address.address,
2108 n->primary_address.session,
2109 n->connect_ack_timestamp);
2113 /* Nothing to do here, ATS will already do what can be done */
2115 case S_DISCONNECT_FINISHED:
2116 /* should not be possible */
2120 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2122 free_neighbour (n, GNUNET_NO);
2126 MEMDEBUG_free (bcc->na.address, __LINE__);
2127 //GNUNET_HELLO_address_free (bcc->na.address);
2128 GNUNET_CONTAINER_DLL_remove (bc_head,
2131 MEMDEBUG_free (bcc, __LINE__);
2136 * We want to know if connecting to a particular peer via
2137 * a particular address is allowed. Check it!
2139 * @param peer identity of the peer to switch the address for
2140 * @param ts time at which the check was initiated
2141 * @param address address of the other peer, NULL if other peer
2143 * @param session session to use (or NULL)
2146 check_blacklist (const struct GNUNET_PeerIdentity *peer,
2147 struct GNUNET_TIME_Absolute ts,
2148 const struct GNUNET_HELLO_Address *address,
2149 struct Session *session)
2151 struct BlackListCheckContext *bcc;
2152 struct GST_BlacklistCheck *bc;
2155 MEMDEBUG_malloc (sizeof (struct BlackListCheckContext), __LINE__);
2156 bcc->na.address = GNUNET_HELLO_address_copy (address);
2157 MEMDEBUG_add_alloc (bcc->na.address, GNUNET_HELLO_address_get_size (address), __LINE__);
2158 bcc->na.session = session;
2159 bcc->na.connect_timestamp = ts;
2160 GNUNET_CONTAINER_DLL_insert (bc_head,
2163 if (NULL != (bc = GST_blacklist_test_allowed (peer,
2164 address->transport_name,
2165 &handle_test_blacklist_cont, bcc)))
2167 /* if NULL == bc, 'cont' was already called and 'bcc' already free'd, so
2168 we must only store 'bc' if 'bc' is non-NULL... */
2173 * We received a 'SESSION_CONNECT' message from the other peer.
2174 * Consider switching to it.
2176 * @param message possibly a 'struct SessionConnectMessage' (check format)
2177 * @param peer identity of the peer to switch the address for
2178 * @param address address of the other peer, NULL if other peer
2180 * @param session session to use (or NULL)
2183 GST_neighbours_handle_connect (const struct GNUNET_MessageHeader *message,
2184 const struct GNUNET_PeerIdentity *peer,
2185 const struct GNUNET_HELLO_Address *address,
2186 struct Session *session)
2188 const struct SessionConnectMessage *scm;
2189 struct NeighbourMapEntry *n;
2190 struct GNUNET_TIME_Absolute ts;
2192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2193 "Received CONNECT message from peer `%s'\n",
2196 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2198 GNUNET_break_op (0);
2201 if (NULL == neighbours)
2202 return; /* we're shutting down */
2203 scm = (const struct SessionConnectMessage *) message;
2204 GNUNET_break_op (0 == ntohl (scm->reserved));
2205 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2206 n = lookup_neighbour (peer);
2208 n = setup_neighbour (peer);
2209 n->send_connect_ack = 1;
2210 n->connect_ack_timestamp = ts;
2214 case S_NOT_CONNECTED:
2215 n->state = S_CONNECT_RECV_BLACKLIST_INBOUND;
2216 /* Do a blacklist check for the new address */
2217 check_blacklist (peer, ts, address, session);
2220 /* CONNECT message takes priority over us asking ATS for address */
2221 n->state = S_CONNECT_RECV_BLACKLIST_INBOUND;
2223 case S_INIT_BLACKLIST:
2224 case S_CONNECT_SENT:
2225 case S_CONNECT_RECV_BLACKLIST_INBOUND:
2226 case S_CONNECT_RECV_ATS:
2227 case S_CONNECT_RECV_BLACKLIST:
2228 case S_CONNECT_RECV_ACK:
2229 /* It can never hurt to have an alternative address in the above cases,
2230 see if it is allowed */
2231 check_blacklist (peer, ts, address, session);
2234 /* we are already connected and can thus send the ACK immediately;
2235 still, it can never hurt to have an alternative address, so also
2236 tell ATS about it */
2237 GNUNET_assert (NULL != n->primary_address.address);
2238 GNUNET_assert (NULL != n->primary_address.session);
2239 n->send_connect_ack = 0;
2240 send_session_connect_ack_message (n->primary_address.address,
2241 n->primary_address.session, ts);
2242 check_blacklist (peer, ts, address, session);
2244 case S_RECONNECT_ATS:
2245 case S_RECONNECT_BLACKLIST:
2246 case S_RECONNECT_SENT:
2247 /* It can never hurt to have an alternative address in the above cases,
2248 see if it is allowed */
2249 check_blacklist (peer, ts, address, session);
2251 case S_CONNECTED_SWITCHING_BLACKLIST:
2252 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2253 /* we are already connected and can thus send the ACK immediately;
2254 still, it can never hurt to have an alternative address, so also
2255 tell ATS about it */
2256 GNUNET_assert (NULL != n->primary_address.address);
2257 GNUNET_assert (NULL != n->primary_address.session);
2258 n->send_connect_ack = 0;
2259 send_session_connect_ack_message (n->primary_address.address,
2260 n->primary_address.session, ts);
2261 check_blacklist (peer, ts, address, session);
2264 /* get rid of remains without terminating sessions, ready to re-try */
2265 free_neighbour (n, GNUNET_YES);
2266 n = setup_neighbour (peer);
2267 n->state = S_CONNECT_RECV_ATS;
2268 GNUNET_ATS_reset_backoff (GST_ats, peer);
2269 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, peer);
2271 case S_DISCONNECT_FINISHED:
2272 /* should not be possible */
2276 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2278 free_neighbour (n, GNUNET_NO);
2285 * For an existing neighbour record, set the active connection to
2286 * use the given address.
2288 * @param peer identity of the peer to switch the address for
2289 * @param address address of the other peer, NULL if other peer
2291 * @param session session to use (or NULL)
2292 * @param ats performance data
2293 * @param ats_count number of entries in ats
2294 * @param bandwidth_in inbound quota to be used when connection is up
2295 * @param bandwidth_out outbound quota to be used when connection is up
2298 GST_neighbours_switch_to_address (const struct GNUNET_PeerIdentity *peer,
2299 const struct GNUNET_HELLO_Address *address,
2300 struct Session *session,
2301 const struct GNUNET_ATS_Information *ats,
2303 struct GNUNET_BANDWIDTH_Value32NBO
2305 struct GNUNET_BANDWIDTH_Value32NBO
2308 struct NeighbourMapEntry *n;
2309 struct GNUNET_TRANSPORT_PluginFunctions *papi;
2311 GNUNET_assert (address->transport_name != NULL);
2312 if (NULL == (n = lookup_neighbour (peer)))
2315 /* Obtain an session for this address from plugin */
2316 if (NULL == (papi = GST_plugins_find (address->transport_name)))
2318 /* we don't have the plugin for this address */
2319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2320 "2348 : `%s' \n", address->transport_name);
2321 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2324 if ((NULL == session) && (0 == address->address_length))
2327 if (strlen (address->transport_name) > 0)
2328 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2333 "ATS tells us to switch to address '%s' session %p for "
2334 "peer `%s' in state %s (quota in/out %u %u )\n",
2335 (address->address_length != 0) ? GST_plugins_a2s (address): "<inbound>",
2338 print_state (n->state),
2339 ntohl (bandwidth_in.value__),
2340 ntohl (bandwidth_out.value__));
2342 if (NULL == session)
2344 session = papi->get_session (papi->cls, address);
2345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2346 "Obtained new session for peer `%s' and address '%s': %p\n",
2347 GNUNET_i2s (&address->peer), GST_plugins_a2s (address), session);
2349 if (NULL == session)
2351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2352 "Failed to obtain new session for peer `%s' and address '%s'\n",
2353 GNUNET_i2s (&address->peer), GST_plugins_a2s (address));
2354 GNUNET_ATS_address_destroyed (GST_ats, address, NULL);
2359 case S_NOT_CONNECTED:
2361 free_neighbour (n, GNUNET_NO);
2364 set_address (&n->primary_address,
2365 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2366 n->state = S_INIT_BLACKLIST;
2367 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2368 check_blacklist (&n->id,
2369 n->connect_ack_timestamp,
2372 case S_INIT_BLACKLIST:
2373 /* ATS suggests a different address, switch again */
2374 set_address (&n->primary_address,
2375 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2376 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2377 check_blacklist (&n->id,
2378 n->connect_ack_timestamp,
2381 case S_CONNECT_SENT:
2382 /* ATS suggests a different address, switch again */
2383 set_address (&n->primary_address,
2384 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2385 n->state = S_INIT_BLACKLIST;
2386 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2387 check_blacklist (&n->id,
2388 n->connect_ack_timestamp,
2391 case S_CONNECT_RECV_ATS:
2392 set_address (&n->primary_address,
2393 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2394 n->state = S_CONNECT_RECV_BLACKLIST;
2395 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2396 check_blacklist (&n->id,
2397 n->connect_ack_timestamp,
2400 case S_CONNECT_RECV_BLACKLIST_INBOUND:
2401 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2402 check_blacklist (&n->id,
2403 n->connect_ack_timestamp,
2406 case S_CONNECT_RECV_BLACKLIST:
2407 case S_CONNECT_RECV_ACK:
2408 /* ATS asks us to switch while we were trying to connect; switch to new
2409 address and check blacklist again */
2410 set_address (&n->primary_address,
2411 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2412 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2413 check_blacklist (&n->id,
2414 n->connect_ack_timestamp,
2418 GNUNET_assert (NULL != n->primary_address.address);
2419 GNUNET_assert (NULL != n->primary_address.session);
2420 if (n->primary_address.session == session)
2422 /* not an address change, just a quota change */
2423 set_address (&n->primary_address,
2424 address, session, bandwidth_in, bandwidth_out, GNUNET_YES);
2427 /* ATS asks us to switch a life connection; see if we can get
2428 a CONNECT_ACK on it before we actually do this! */
2429 set_address (&n->alternative_address,
2430 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2431 n->state = S_CONNECTED_SWITCHING_BLACKLIST;
2432 check_blacklist (&n->id,
2433 GNUNET_TIME_absolute_get (),
2436 case S_RECONNECT_ATS:
2437 set_address (&n->primary_address,
2438 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2439 n->state = S_RECONNECT_BLACKLIST;
2440 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2441 check_blacklist (&n->id,
2442 n->connect_ack_timestamp,
2445 case S_RECONNECT_BLACKLIST:
2446 /* ATS asks us to switch while we were trying to reconnect; switch to new
2447 address and check blacklist again */
2448 set_address (&n->primary_address,
2449 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2450 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2451 check_blacklist (&n->id,
2452 n->connect_ack_timestamp,
2455 case S_RECONNECT_SENT:
2456 /* ATS asks us to switch while we were trying to reconnect; switch to new
2457 address and check blacklist again */
2458 set_address (&n->primary_address,
2459 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2460 n->state = S_RECONNECT_BLACKLIST;
2461 n->timeout = GNUNET_TIME_relative_to_absolute (BLACKLIST_RESPONSE_TIMEOUT);
2462 check_blacklist (&n->id,
2463 n->connect_ack_timestamp,
2466 case S_CONNECTED_SWITCHING_BLACKLIST:
2467 if (n->primary_address.session == session)
2469 /* ATS switches back to still-active session */
2470 free_address (&n->alternative_address);
2471 n->state = S_CONNECTED;
2474 /* ATS asks us to switch a life connection, update blacklist check */
2475 set_address (&n->alternative_address,
2476 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2477 check_blacklist (&n->id,
2478 GNUNET_TIME_absolute_get (),
2481 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2482 if (n->primary_address.session == session)
2484 /* ATS switches back to still-active session */
2485 free_address (&n->alternative_address);
2486 n->state = S_CONNECTED;
2489 /* ATS asks us to switch a life connection, update blacklist check */
2490 set_address (&n->alternative_address,
2491 address, session, bandwidth_in, bandwidth_out, GNUNET_NO);
2492 n->state = S_CONNECTED_SWITCHING_BLACKLIST;
2493 check_blacklist (&n->id,
2494 GNUNET_TIME_absolute_get (),
2498 /* not going to switch addresses while disconnecting */
2500 case S_DISCONNECT_FINISHED:
2504 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2512 * Master task run for every neighbour. Performs all of the time-related
2513 * activities (keep alive, send next message, disconnect if idle, finish
2514 * clean up after disconnect).
2516 * @param cls the 'struct NeighbourMapEntry' for which we are running
2517 * @param tc scheduler context (unused)
2520 master_task (void *cls,
2521 const struct GNUNET_SCHEDULER_TaskContext *tc)
2523 struct NeighbourMapEntry *n = cls;
2524 struct GNUNET_TIME_Relative delay;
2526 n->task = GNUNET_SCHEDULER_NO_TASK;
2527 delay = GNUNET_TIME_absolute_get_remaining (n->timeout);
2528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2529 "Master task runs for neighbour `%s' in state %s with timeout in %llu ms\n",
2530 GNUNET_i2s (&n->id),
2531 print_state(n->state),
2532 (unsigned long long) delay.rel_value);
2535 case S_NOT_CONNECTED:
2536 /* invalid state for master task, clean up */
2538 n->state = S_DISCONNECT_FINISHED;
2539 free_neighbour (n, GNUNET_NO);
2542 if (0 == delay.rel_value)
2544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2545 "Connection to `%s' timed out waiting for ATS to provide address\n",
2546 GNUNET_i2s (&n->id));
2547 n->state = S_DISCONNECT_FINISHED;
2548 free_neighbour (n, GNUNET_NO);
2552 case S_INIT_BLACKLIST:
2553 if (0 == delay.rel_value)
2555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2556 "Connection to `%s' timed out waiting for BLACKLIST to approve address\n",
2557 GNUNET_i2s (&n->id));
2558 n->state = S_DISCONNECT_FINISHED;
2559 free_neighbour (n, GNUNET_NO);
2563 case S_CONNECT_SENT:
2564 if (0 == delay.rel_value)
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2567 "Connection to `%s' timed out waiting for other peer to send CONNECT_ACK\n",
2568 GNUNET_i2s (&n->id));
2569 disconnect_neighbour (n);
2573 case S_CONNECT_RECV_BLACKLIST_INBOUND:
2574 if (0 == delay.rel_value)
2576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2577 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for received CONNECT\n",
2578 GNUNET_i2s (&n->id));
2579 n->state = S_DISCONNECT_FINISHED;
2580 free_neighbour (n, GNUNET_NO);
2584 case S_CONNECT_RECV_ATS:
2585 if (0 == delay.rel_value)
2587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2588 "Connection to `%s' timed out waiting ATS to provide address to use for CONNECT_ACK\n",
2589 GNUNET_i2s (&n->id));
2590 n->state = S_DISCONNECT_FINISHED;
2591 free_neighbour (n, GNUNET_NO);
2595 case S_CONNECT_RECV_BLACKLIST:
2596 if (0 == delay.rel_value)
2598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2599 "Connection to `%s' timed out waiting BLACKLIST to approve address to use for CONNECT_ACK\n",
2600 GNUNET_i2s (&n->id));
2601 n->state = S_DISCONNECT_FINISHED;
2602 free_neighbour (n, GNUNET_NO);
2606 case S_CONNECT_RECV_ACK:
2607 if (0 == delay.rel_value)
2609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2610 "Connection to `%s' timed out waiting for other peer to send SESSION_ACK\n",
2611 GNUNET_i2s (&n->id));
2612 disconnect_neighbour (n);
2617 if (0 == delay.rel_value)
2619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2620 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
2621 GNUNET_i2s (&n->id));
2622 disconnect_neighbour (n);
2625 try_transmission_to_peer (n);
2628 case S_RECONNECT_ATS:
2629 if (0 == delay.rel_value)
2631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2632 "Connection to `%s' timed out, waiting for ATS replacement address\n",
2633 GNUNET_i2s (&n->id));
2634 disconnect_neighbour (n);
2638 case S_RECONNECT_BLACKLIST:
2639 if (0 == delay.rel_value)
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 "Connection to `%s' timed out, waiting for BLACKLIST to approve replacement address\n",
2643 GNUNET_i2s (&n->id));
2644 disconnect_neighbour (n);
2648 case S_RECONNECT_SENT:
2649 if (0 == delay.rel_value)
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "Connection to `%s' timed out, waiting for other peer to CONNECT_ACK replacement address\n",
2653 GNUNET_i2s (&n->id));
2654 disconnect_neighbour (n);
2658 case S_CONNECTED_SWITCHING_BLACKLIST:
2659 if (0 == delay.rel_value)
2661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2662 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs\n",
2663 GNUNET_i2s (&n->id));
2664 disconnect_neighbour (n);
2667 try_transmission_to_peer (n);
2670 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2671 if (0 == delay.rel_value)
2673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2674 "Connection to `%s' timed out, missing KEEPALIVE_RESPONSEs (after trying to CONNECT on alternative address)\n",
2675 GNUNET_i2s (&n->id));
2676 disconnect_neighbour (n);
2679 try_transmission_to_peer (n);
2683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2684 "Cleaning up connection to `%s' after sending DISCONNECT\n",
2685 GNUNET_i2s (&n->id));
2686 free_neighbour (n, GNUNET_NO);
2688 case S_DISCONNECT_FINISHED:
2689 /* how did we get here!? */
2693 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2697 if ( (S_CONNECTED_SWITCHING_CONNECT_SENT == n->state) ||
2698 (S_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
2699 (S_CONNECTED == n->state) )
2701 /* if we are *now* in one of these three states, we're sending
2702 keep alive messages, so we need to consider the keepalive
2703 delay, not just the connection timeout */
2704 delay = GNUNET_TIME_relative_min (GNUNET_TIME_absolute_get_remaining (n->keep_alive_time),
2707 if (GNUNET_SCHEDULER_NO_TASK == n->task)
2708 n->task = GNUNET_SCHEDULER_add_delayed (delay,
2715 * Send a SESSION_ACK message to the neighbour to confirm that we
2716 * got his CONNECT_ACK.
2718 * @param n neighbour to send the SESSION_ACK to
2721 send_session_ack_message (struct NeighbourMapEntry *n)
2723 struct GNUNET_MessageHeader msg;
2725 msg.size = htons (sizeof (struct GNUNET_MessageHeader));
2726 msg.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_ACK);
2727 (void) send_with_session(n,
2728 (const char *) &msg, sizeof (struct GNUNET_MessageHeader),
2729 UINT32_MAX, GNUNET_TIME_UNIT_FOREVER_REL,
2735 * We received a 'SESSION_CONNECT_ACK' message from the other peer.
2736 * Consider switching to it.
2738 * @param message possibly a 'struct SessionConnectMessage' (check format)
2739 * @param peer identity of the peer to switch the address for
2740 * @param address address of the other peer, NULL if other peer
2742 * @param session session to use (or NULL)
2745 GST_neighbours_handle_connect_ack (const struct GNUNET_MessageHeader *message,
2746 const struct GNUNET_PeerIdentity *peer,
2747 const struct GNUNET_HELLO_Address *address,
2748 struct Session *session)
2750 const struct SessionConnectMessage *scm;
2751 struct GNUNET_TIME_Absolute ts;
2752 struct NeighbourMapEntry *n;
2754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2755 "Received CONNECT_ACK message from peer `%s'\n",
2758 if (ntohs (message->size) != sizeof (struct SessionConnectMessage))
2760 GNUNET_break_op (0);
2763 scm = (const struct SessionConnectMessage *) message;
2764 GNUNET_break_op (ntohl (scm->reserved) == 0);
2765 if (NULL == (n = lookup_neighbour (peer)))
2767 GNUNET_STATISTICS_update (GST_stats,
2769 ("# unexpected CONNECT_ACK messages (no peer)"),
2773 ts = GNUNET_TIME_absolute_ntoh (scm->timestamp);
2776 case S_NOT_CONNECTED:
2778 free_neighbour (n, GNUNET_NO);
2781 case S_INIT_BLACKLIST:
2782 GNUNET_STATISTICS_update (GST_stats,
2784 ("# unexpected CONNECT_ACK messages (not ready)"),
2787 case S_CONNECT_SENT:
2788 if (ts.abs_value != n->primary_address.connect_timestamp.abs_value)
2789 break; /* ACK does not match our original CONNECT message */
2790 n->state = S_CONNECTED;
2791 n->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2792 GNUNET_STATISTICS_set (GST_stats,
2793 gettext_noop ("# peers connected"),
2794 ++neighbours_connected,
2796 connect_notify_cb (callback_cls, &n->id,
2797 n->primary_address.bandwidth_in,
2798 n->primary_address.bandwidth_out);
2799 /* Tell ATS that the outbound session we created to send CONNECT was successfull */
2800 GST_ats_add_address (n->primary_address.address, n->primary_address.session);
2801 set_address (&n->primary_address,
2802 n->primary_address.address,
2803 n->primary_address.session,
2804 n->primary_address.bandwidth_in,
2805 n->primary_address.bandwidth_out,
2807 send_session_ack_message (n);
2809 case S_CONNECT_RECV_BLACKLIST_INBOUND:
2810 case S_CONNECT_RECV_ATS:
2811 case S_CONNECT_RECV_BLACKLIST:
2812 case S_CONNECT_RECV_ACK:
2813 GNUNET_STATISTICS_update (GST_stats,
2815 ("# unexpected CONNECT_ACK messages (not ready)"),
2819 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
2820 send_session_ack_message (n);
2822 case S_RECONNECT_ATS:
2823 case S_RECONNECT_BLACKLIST:
2824 /* we didn't expect any CONNECT_ACK, as we are waiting for ATS
2825 to give us a new address... */
2826 GNUNET_STATISTICS_update (GST_stats,
2828 ("# unexpected CONNECT_ACK messages (waiting on ATS)"),
2831 case S_RECONNECT_SENT:
2832 /* new address worked; go back to connected! */
2833 n->state = S_CONNECTED;
2834 send_session_ack_message (n);
2836 case S_CONNECTED_SWITCHING_BLACKLIST:
2837 /* duplicate CONNECT_ACK, let's answer by duplciate SESSION_ACK just in case */
2838 send_session_ack_message (n);
2840 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2841 /* new address worked; adopt it and go back to connected! */
2842 n->state = S_CONNECTED;
2843 n->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2844 GNUNET_break (GNUNET_NO == n->alternative_address.ats_active);
2846 GST_ats_add_address (n->alternative_address.address, n->alternative_address.session);
2847 set_address (&n->primary_address,
2848 n->alternative_address.address,
2849 n->alternative_address.session,
2850 n->alternative_address.bandwidth_in,
2851 n->alternative_address.bandwidth_out,
2853 free_address (&n->alternative_address);
2854 send_session_ack_message (n);
2857 GNUNET_STATISTICS_update (GST_stats,
2859 ("# unexpected CONNECT_ACK messages (disconnecting)"),
2862 case S_DISCONNECT_FINISHED:
2866 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2874 * A session was terminated. Take note; if needed, try to get
2875 * an alternative address from ATS.
2877 * @param peer identity of the peer where the session died
2878 * @param session session that is gone
2879 * @return GNUNET_YES if this was a session used, GNUNET_NO if
2880 * this session was not in use
2883 GST_neighbours_session_terminated (const struct GNUNET_PeerIdentity *peer,
2884 struct Session *session)
2886 struct NeighbourMapEntry *n;
2887 struct BlackListCheckContext *bcc;
2888 struct BlackListCheckContext *bcc_next;
2890 /* make sure to cancel all ongoing blacklist checks involving 'session' */
2892 while (NULL != (bcc = bcc_next))
2894 bcc_next = bcc->next;
2895 if (bcc->na.session == session)
2897 GST_blacklist_test_cancel (bcc->bc);
2898 MEMDEBUG_free (bcc->na.address, __LINE__);
2899 //GNUNET_HELLO_address_free (bcc->na.address);
2900 GNUNET_CONTAINER_DLL_remove (bc_head,
2903 MEMDEBUG_free (bcc, __LINE__);
2906 if (NULL == (n = lookup_neighbour (peer)))
2907 return GNUNET_NO; /* can't affect us */
2908 if (session != n->primary_address.session)
2910 if (session == n->alternative_address.session)
2912 free_address (&n->alternative_address);
2913 if ( (S_CONNECTED_SWITCHING_BLACKLIST == n->state) ||
2914 (S_CONNECTED_SWITCHING_CONNECT_SENT == n->state) )
2915 n->state = S_CONNECTED;
2919 return GNUNET_NO; /* doesn't affect us further */
2922 n->expect_latency_response = GNUNET_NO;
2925 case S_NOT_CONNECTED:
2927 free_neighbour (n, GNUNET_NO);
2931 free_neighbour (n, GNUNET_NO);
2933 case S_INIT_BLACKLIST:
2934 case S_CONNECT_SENT:
2935 free_address (&n->primary_address);
2936 n->state = S_INIT_ATS;
2937 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
2938 // FIXME: need to ask ATS for suggestions again?
2939 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
2941 case S_CONNECT_RECV_BLACKLIST_INBOUND:
2942 case S_CONNECT_RECV_ATS:
2943 case S_CONNECT_RECV_BLACKLIST:
2944 case S_CONNECT_RECV_ACK:
2945 /* error on inbound session; free neighbour entirely */
2946 free_address (&n->primary_address);
2947 free_neighbour (n, GNUNET_NO);
2950 free_address (&n->primary_address);
2951 n->state = S_RECONNECT_ATS;
2952 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
2953 /* FIXME: is this ATS call needed? */
2954 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
2956 case S_RECONNECT_ATS:
2957 /* we don't have an address, how can it go down? */
2960 case S_RECONNECT_BLACKLIST:
2961 case S_RECONNECT_SENT:
2962 n->state = S_RECONNECT_ATS;
2963 n->timeout = GNUNET_TIME_relative_to_absolute (ATS_RESPONSE_TIMEOUT);
2964 // FIXME: need to ask ATS for suggestions again?
2965 n->suggest_handle = GNUNET_ATS_suggest_address (GST_ats, &n->id);
2967 case S_CONNECTED_SWITCHING_BLACKLIST:
2968 /* primary went down while we were checking secondary against
2969 blacklist, adopt secondary as primary */
2970 free_address (&n->primary_address);
2971 n->primary_address = n->alternative_address;
2972 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
2973 n->timeout = GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT);
2974 n->state = S_RECONNECT_BLACKLIST;
2976 case S_CONNECTED_SWITCHING_CONNECT_SENT:
2977 /* primary went down while we were waiting for CONNECT_ACK on secondary;
2978 secondary as primary */
2979 free_address (&n->primary_address);
2980 n->primary_address = n->alternative_address;
2981 memset (&n->alternative_address, 0, sizeof (struct NeighbourAddress));
2982 n->timeout = GNUNET_TIME_relative_to_absolute (FAST_RECONNECT_TIMEOUT);
2983 n->state = S_RECONNECT_SENT;
2986 free_address (&n->primary_address);
2988 case S_DISCONNECT_FINISHED:
2989 /* neighbour was freed and plugins told to terminate session */
2993 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
2997 if (GNUNET_SCHEDULER_NO_TASK != n->task)
2998 GNUNET_SCHEDULER_cancel (n->task);
2999 n->task = GNUNET_SCHEDULER_add_now (&master_task, n);
3005 * We received a 'SESSION_ACK' message from the other peer.
3006 * If we sent a 'CONNECT_ACK' last, this means we are now
3007 * connected. Otherwise, do nothing.
3009 * @param message possibly a 'struct SessionConnectMessage' (check format)
3010 * @param peer identity of the peer to switch the address for
3011 * @param address address of the other peer, NULL if other peer
3013 * @param session session to use (or NULL)
3016 GST_neighbours_handle_session_ack (const struct GNUNET_MessageHeader *message,
3017 const struct GNUNET_PeerIdentity *peer,
3018 const struct GNUNET_HELLO_Address *address,
3019 struct Session *session)
3021 struct NeighbourMapEntry *n;
3023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3024 "Received SESSION_ACK message from peer `%s'\n",
3026 if (ntohs (message->size) != sizeof (struct GNUNET_MessageHeader))
3028 GNUNET_break_op (0);
3031 if (NULL == (n = lookup_neighbour (peer)))
3033 /* check if we are in a plausible state for having sent
3034 a CONNECT_ACK. If not, return, otherwise break */
3035 if ( ( (S_CONNECT_RECV_ACK != n->state) &&
3036 (S_CONNECT_SENT != n->state) ) ||
3037 (2 != n->send_connect_ack) )
3039 GNUNET_STATISTICS_update (GST_stats,
3040 gettext_noop ("# unexpected SESSION ACK messages"), 1,
3044 n->state = S_CONNECTED;
3045 n->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3046 GNUNET_STATISTICS_set (GST_stats,
3047 gettext_noop ("# peers connected"),
3048 ++neighbours_connected,
3050 connect_notify_cb (callback_cls, &n->id,
3051 n->primary_address.bandwidth_in,
3052 n->primary_address.bandwidth_out);
3054 GST_ats_add_address (n->primary_address.address, n->primary_address.session);
3055 set_address (&n->primary_address,
3056 n->primary_address.address,
3057 n->primary_address.session,
3058 n->primary_address.bandwidth_in,
3059 n->primary_address.bandwidth_out,
3065 * Test if we're connected to the given peer.
3067 * @param target peer to test
3068 * @return GNUNET_YES if we are connected, GNUNET_NO if not
3071 GST_neighbours_test_connected (const struct GNUNET_PeerIdentity *target)
3073 return test_connected (lookup_neighbour (target));
3078 * Change the incoming quota for the given peer.
3080 * @param neighbour identity of peer to change qutoa for
3081 * @param quota new quota
3084 GST_neighbours_set_incoming_quota (const struct GNUNET_PeerIdentity *neighbour,
3085 struct GNUNET_BANDWIDTH_Value32NBO quota)
3087 struct NeighbourMapEntry *n;
3089 if (NULL == (n = lookup_neighbour (neighbour)))
3091 GNUNET_STATISTICS_update (GST_stats,
3093 ("# SET QUOTA messages ignored (no such peer)"),
3097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3098 "Setting inbound quota of %u Bps for peer `%s' to all clients\n",
3099 ntohl (quota.value__), GNUNET_i2s (&n->id));
3100 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker, quota);
3101 if (0 != ntohl (quota.value__))
3103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting peer `%4s' due to `%s'\n",
3104 GNUNET_i2s (&n->id), "SET_QUOTA");
3105 if (GNUNET_YES == test_connected (n))
3106 GNUNET_STATISTICS_update (GST_stats,
3107 gettext_noop ("# disconnects due to quota of 0"),
3109 disconnect_neighbour (n);
3114 * We received a disconnect message from the given peer,
3115 * validate and process.
3117 * @param peer sender of the message
3118 * @param msg the disconnect message
3121 GST_neighbours_handle_disconnect_message (const struct GNUNET_PeerIdentity
3123 const struct GNUNET_MessageHeader
3126 struct NeighbourMapEntry *n;
3127 const struct SessionDisconnectMessage *sdm;
3128 struct GNUNET_HashCode hc;
3130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3131 "Received DISCONNECT message from peer `%s'\n",
3133 if (ntohs (msg->size) != sizeof (struct SessionDisconnectMessage))
3135 // GNUNET_break_op (0);
3136 GNUNET_STATISTICS_update (GST_stats,
3138 ("# disconnect messages ignored (old format)"), 1,
3142 sdm = (const struct SessionDisconnectMessage *) msg;
3143 if (NULL == (n = lookup_neighbour (peer)))
3144 return; /* gone already */
3145 if (GNUNET_TIME_absolute_ntoh (sdm->timestamp).abs_value <= n->connect_ack_timestamp.abs_value)
3147 GNUNET_STATISTICS_update (GST_stats,
3149 ("# disconnect messages ignored (timestamp)"), 1,
3153 GNUNET_CRYPTO_hash (&sdm->public_key,
3154 sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded),
3156 if (0 != memcmp (peer, &hc, sizeof (struct GNUNET_PeerIdentity)))
3158 GNUNET_break_op (0);
3161 if (ntohl (sdm->purpose.size) !=
3162 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
3163 sizeof (struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded) +
3164 sizeof (struct GNUNET_TIME_AbsoluteNBO))
3166 GNUNET_break_op (0);
3170 GNUNET_CRYPTO_ecc_verify
3171 (GNUNET_MESSAGE_TYPE_TRANSPORT_SESSION_DISCONNECT, &sdm->purpose,
3172 &sdm->signature, &sdm->public_key))
3174 GNUNET_break_op (0);
3177 if (GNUNET_YES == test_connected (n))
3178 GNUNET_STATISTICS_update (GST_stats,
3180 ("# other peer asked to disconnect from us"), 1,
3182 disconnect_neighbour (n);
3187 * Closure for the neighbours_iterate function.
3189 struct IteratorContext
3192 * Function to call on each connected neighbour.
3194 GST_NeighbourIterator cb;
3204 * Call the callback from the closure for each connected neighbour.
3206 * @param cls the 'struct IteratorContext'
3207 * @param key the hash of the public key of the neighbour
3208 * @param value the 'struct NeighbourMapEntry'
3209 * @return GNUNET_OK (continue to iterate)
3212 neighbours_iterate (void *cls, const struct GNUNET_HashCode * key, void *value)
3214 struct IteratorContext *ic = cls;
3215 struct NeighbourMapEntry *n = value;
3217 if (GNUNET_YES == test_connected (n))
3219 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in;
3220 struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out;
3222 if (NULL != n->primary_address.address)
3224 bandwidth_in = n->primary_address.bandwidth_in;
3225 bandwidth_out = n->primary_address.bandwidth_out;
3229 bandwidth_in = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3230 bandwidth_out = GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT;
3233 ic->cb (ic->cb_cls, &n->id,
3234 n->primary_address.address,
3235 bandwidth_in, bandwidth_out);
3242 * Iterate over all connected neighbours.
3244 * @param cb function to call
3245 * @param cb_cls closure for cb
3248 GST_neighbours_iterate (GST_NeighbourIterator cb, void *cb_cls)
3250 struct IteratorContext ic;
3252 if (NULL == neighbours)
3253 return; /* can happen during shutdown */
3256 GNUNET_CONTAINER_multihashmap_iterate (neighbours, &neighbours_iterate, &ic);
3261 * If we have an active connection to the given target, it must be shutdown.
3263 * @param target peer to disconnect from
3266 GST_neighbours_force_disconnect (const struct GNUNET_PeerIdentity *target)
3268 struct NeighbourMapEntry *n;
3270 if (NULL == (n = lookup_neighbour (target)))
3271 return; /* not active */
3272 if (GNUNET_YES == test_connected (n))
3273 GNUNET_STATISTICS_update (GST_stats,
3275 ("# disconnected from peer upon explicit request"), 1,
3277 disconnect_neighbour (n);
3282 * Obtain current latency information for the given neighbour.
3284 * @param peer to get the latency for
3285 * @return observed latency of the address, FOREVER if the
3286 * the connection is not up
3288 struct GNUNET_TIME_Relative
3289 GST_neighbour_get_latency (const struct GNUNET_PeerIdentity *peer)
3291 struct NeighbourMapEntry *n;
3293 n = lookup_neighbour (peer);
3295 return GNUNET_TIME_UNIT_FOREVER_REL;
3299 case S_CONNECTED_SWITCHING_CONNECT_SENT:
3300 case S_CONNECTED_SWITCHING_BLACKLIST:
3301 case S_RECONNECT_SENT:
3302 case S_RECONNECT_ATS:
3303 case S_RECONNECT_BLACKLIST:
3305 case S_NOT_CONNECTED:
3306 case S_INIT_BLACKLIST:
3308 case S_CONNECT_RECV_BLACKLIST_INBOUND:
3309 case S_CONNECT_RECV_ATS:
3310 case S_CONNECT_RECV_BLACKLIST:
3311 case S_CONNECT_RECV_ACK:
3312 case S_CONNECT_SENT:
3314 case S_DISCONNECT_FINISHED:
3315 return GNUNET_TIME_UNIT_FOREVER_REL;
3317 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Unhandled state `%s' \n",print_state (n->state));
3321 return GNUNET_TIME_UNIT_FOREVER_REL;
3326 * Obtain current address information for the given neighbour.
3329 * @return address currently used
3331 struct GNUNET_HELLO_Address *
3332 GST_neighbour_get_current_address (const struct GNUNET_PeerIdentity *peer)
3334 struct NeighbourMapEntry *n;
3336 n = lookup_neighbour (peer);
3339 return n->primary_address.address;
3344 * Initialize the neighbours subsystem.
3346 * @param cls closure for callbacks
3347 * @param connect_cb function to call if we connect to a peer
3348 * @param disconnect_cb function to call if we disconnect from a peer
3349 * @param peer_address_cb function to call if we change an active address
3351 * @param max_fds maximum number of fds to use
3354 GST_neighbours_start (void *cls,
3355 NotifyConnect connect_cb,
3356 GNUNET_TRANSPORT_NotifyDisconnect disconnect_cb,
3357 GNUNET_TRANSPORT_PeerIterateCallback peer_address_cb,
3358 unsigned int max_fds)
3361 connect_notify_cb = connect_cb;
3362 disconnect_notify_cb = disconnect_cb;
3363 address_change_cb = peer_address_cb;
3364 neighbours = GNUNET_CONTAINER_multihashmap_create (NEIGHBOUR_TABLE_SIZE, GNUNET_NO);
3369 * Disconnect from the given neighbour.
3372 * @param key hash of neighbour's public key (not used)
3373 * @param value the 'struct NeighbourMapEntry' of the neighbour
3374 * @return GNUNET_OK (continue to iterate)
3377 disconnect_all_neighbours (void *cls, const struct GNUNET_HashCode * key, void *value)
3379 struct NeighbourMapEntry *n = value;
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3382 "Disconnecting peer `%4s', %s\n",
3383 GNUNET_i2s (&n->id), "SHUTDOWN_TASK");
3384 n->state = S_DISCONNECT_FINISHED;
3385 free_neighbour (n, GNUNET_NO);
3391 * Cleanup the neighbours subsystem.
3394 GST_neighbours_stop ()
3396 if (NULL == neighbours)
3398 GNUNET_CONTAINER_multihashmap_iterate (neighbours,
3399 &disconnect_all_neighbours,
3401 GNUNET_CONTAINER_multihashmap_destroy (neighbours);
3403 callback_cls = NULL;
3404 connect_notify_cb = NULL;
3405 disconnect_notify_cb = NULL;
3406 address_change_cb = NULL;
3410 /* end of file gnunet-service-transport_neighbours.c */