2 This file is part of GNUnet.
3 (C) 2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
23 #include "gnunet_util_lib.h"
25 #include "gnunet_transport_service.h"
26 #include "gnunet_core_service.h"
27 #include "gnunet_statistics_service.h"
29 #include "mesh_protocol.h"
31 #include "gnunet-service-mesh_peer.h"
32 #include "gnunet-service-mesh_dht.h"
33 #include "gnunet-service-mesh_connection.h"
34 #include "gnunet-service-mesh_tunnel.h"
35 #include "mesh_path.h"
37 #define LOG(level, ...) GNUNET_log_from (level,"mesh-p2p",__VA_ARGS__)
39 /******************************************************************************/
40 /******************************** STRUCTS **********************************/
41 /******************************************************************************/
44 * Struct containing info about a queued transmission to this peer
51 struct MeshPeerQueue *next;
56 struct MeshPeerQueue *prev;
59 * Peer this transmission is directed to.
61 struct MeshPeer *peer;
64 * Connection this message belongs to.
66 struct MeshConnection *c;
74 * Pointer to info stucture used as cls.
89 * Set when this message starts waiting for CORE.
91 struct GNUNET_TIME_Absolute start_waiting;
94 * Function to call on sending.
99 * Closure for callback.
105 * Struct containing all information regarding a given peer
115 * Last time we heard from this peer
117 struct GNUNET_TIME_Absolute last_contact;
120 * Paths to reach the peer, ordered by ascending hop count
122 struct MeshPeerPath *path_head;
125 * Paths to reach the peer, ordered by ascending hop count
127 struct MeshPeerPath *path_tail;
130 * Handle to stop the DHT search for paths to this peer
132 struct GMD_search_handle *search_h;
135 * Tunnel to this peer, if any.
137 struct MeshTunnel3 *tunnel;
140 * Connections that go through this peer, indexed by tid;
142 struct GNUNET_CONTAINER_MultiHashMap *connections;
145 * Handle for queued transmissions
147 struct GNUNET_CORE_TransmitHandle *core_transmit;
150 * Transmission queue to core DLL head
152 struct MeshPeerQueue *queue_head;
155 * Transmission queue to core DLL tail
157 struct MeshPeerQueue *queue_tail;
160 * How many messages are in the queue to this peer.
162 unsigned int queue_n;
167 struct GNUNET_HELLO_Message* hello;
171 /******************************************************************************/
172 /******************************* GLOBALS ***********************************/
173 /******************************************************************************/
176 * Global handle to the statistics service.
178 extern struct GNUNET_STATISTICS_Handle *stats;
181 * Local peer own ID (full value).
183 extern struct GNUNET_PeerIdentity my_full_id;
186 * Local peer own ID (short)
188 extern GNUNET_PEER_Id myid;
191 * Peers known, indexed by PeerIdentity (MeshPeer).
193 static struct GNUNET_CONTAINER_MultiPeerMap *peers;
196 * How many peers do we want to remember?
198 static unsigned long long max_peers;
201 * Percentage of messages that will be dropped (for test purposes only).
203 static unsigned long long drop_percent;
206 * Handle to communicate with core.
208 static struct GNUNET_CORE_Handle *core_handle;
210 static struct GNUNET_TRANSPORT_Handle *transport_handle;
213 /******************************************************************************/
214 /***************************** CORE CALLBACKS *********************************/
215 /******************************************************************************/
219 * Iterator to notify all connections of a broken link. Mark connections
220 * to destroy after all traffic has been sent.
222 * @param cls Closure (peer disconnected).
223 * @param key Current key code (peer id).
224 * @param value Value in the hash map (connection).
226 * @return #GNUNET_YES to continue to iterate.
229 notify_broken (void *cls,
230 const struct GNUNET_HashCode *key,
233 struct MeshPeer *peer = cls;
234 struct MeshConnection *c = value;
236 LOG (GNUNET_ERROR_TYPE_DEBUG, " notifying %s due to %s\n",
237 GMC_2s (c), GMP_2s (peer));
238 GMC_notify_broken (c, peer);
245 * Remove the direct path to the peer.
247 * @param peer Peer to remove the direct path from.
250 static struct MeshPeerPath *
251 pop_direct_path (struct MeshPeer *peer)
253 struct MeshPeerPath *iter;
255 for (iter = peer->path_head; NULL != iter; iter = iter->next)
257 if (2 <= iter->length)
259 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, iter);
269 * Method called whenever a given peer connects.
272 * @param peer peer identity this notification is about
275 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
278 struct MeshPeerPath *path;
281 strncpy (own_id, GNUNET_i2s (&my_full_id), 15);
285 LOG (GNUNET_ERROR_TYPE_INFO, "CONNECTED %s (self)\n", own_id);
290 LOG (GNUNET_ERROR_TYPE_DEBUG, "CONNECTED %s <= %s\n",
291 own_id, GNUNET_i2s (peer));
293 path->peers[1] = mp->id;
294 GNUNET_PEER_change_rc (mp->id, 1);
295 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
297 path->peers[0] = myid;
298 GNUNET_PEER_change_rc (myid, 1);
299 GMP_add_path (mp, path, GNUNET_YES);
301 mp->connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
307 * Method called whenever a peer disconnects.
310 * @param peer peer identity this notification is about
313 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
316 struct MeshPeerPath *direct_path;
319 strncpy (own_id, GNUNET_i2s (&my_full_id), 15);
320 p = GNUNET_CONTAINER_multipeermap_get (peers, peer);
327 LOG (GNUNET_ERROR_TYPE_INFO, "DISCONNECTED %s (self)\n", own_id);
329 LOG (GNUNET_ERROR_TYPE_DEBUG, "DISCONNECTED %s <= %s\n",
330 own_id, GNUNET_i2s (peer));
331 direct_path = pop_direct_path (p);
332 GNUNET_CONTAINER_multihashmap_iterate (p->connections, ¬ify_broken, p);
333 GNUNET_CONTAINER_multihashmap_destroy (p->connections);
334 p->connections = NULL;
335 if (NULL != p->core_transmit)
337 GNUNET_CORE_notify_transmit_ready_cancel (p->core_transmit);
338 p->core_transmit = NULL;
340 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
342 path_destroy (direct_path);
348 * Functions to handle messages from core
350 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
351 {&GMC_handle_create, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE, 0},
352 {&GMC_handle_confirm, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
353 sizeof (struct GNUNET_MESH_ConnectionACK)},
354 {&GMC_handle_broken, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN,
355 sizeof (struct GNUNET_MESH_ConnectionBroken)},
356 {&GMC_handle_destroy, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY,
357 sizeof (struct GNUNET_MESH_ConnectionDestroy)},
358 {&GMC_handle_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
359 sizeof (struct GNUNET_MESH_ACK)},
360 {&GMC_handle_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
361 sizeof (struct GNUNET_MESH_Poll)},
362 {&GMC_handle_encrypted, GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED, 0},
363 {&GMC_handle_kx, GNUNET_MESSAGE_TYPE_MESH_KX, 0},
369 * To be called on core init/fail.
371 * @param cls Closure (config)
372 * @param identity the public identity of this peer
375 core_init (void *cls,
376 const struct GNUNET_PeerIdentity *identity)
378 const struct GNUNET_CONFIGURATION_Handle *c = cls;
381 LOG (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
382 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)))
384 LOG (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
385 LOG (GNUNET_ERROR_TYPE_ERROR, " core id %s\n", GNUNET_i2s (identity));
386 LOG (GNUNET_ERROR_TYPE_ERROR, " my id %s\n", GNUNET_i2s (&my_full_id));
387 GNUNET_CORE_disconnect (core_handle);
388 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
389 NULL, /* Closure passed to MESH functions */
390 &core_init, /* Call core_init once connected */
391 &core_connect, /* Handle connects */
392 &core_disconnect, /* remove peers on disconnects */
393 NULL, /* Don't notify about all incoming messages */
394 GNUNET_NO, /* For header only in notification */
395 NULL, /* Don't notify about all outbound messages */
396 GNUNET_NO, /* For header-only out notification */
397 core_handlers); /* Register these handlers */
406 * Core callback to write a pre-constructed data packet to core buffer
408 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
409 * @param size Number of bytes available in buf.
410 * @param buf Where the to write the message.
412 * @return number of bytes written to buf
415 send_core_data_raw (void *cls, size_t size, void *buf)
417 struct GNUNET_MessageHeader *msg = cls;
420 GNUNET_assert (NULL != msg);
421 total_size = ntohs (msg->size);
423 if (total_size > size)
428 memcpy (buf, msg, total_size);
435 * Function to send a create connection message to a peer.
437 * @param c Connection to create.
438 * @param size number of bytes available in buf
439 * @param buf where the callee should write the message
440 * @return number of bytes written to buf
443 send_core_connection_create (struct MeshConnection *c, size_t size, void *buf)
445 struct GNUNET_MESH_ConnectionCreate *msg;
446 struct GNUNET_PeerIdentity *peer_ptr;
447 const struct MeshPeerPath *p = GMC_get_path (c);
454 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION CREATE...\n");
456 sizeof (struct GNUNET_MESH_ConnectionCreate) +
457 p->length * sizeof (struct GNUNET_PeerIdentity);
459 if (size < size_needed || NULL == buf)
464 msg = (struct GNUNET_MESH_ConnectionCreate *) buf;
465 msg->header.size = htons (size_needed);
466 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE);
467 msg->cid = *GMC_get_id (c);
469 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
470 for (i = 0; i < p->length; i++)
472 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
475 LOG (GNUNET_ERROR_TYPE_DEBUG,
476 "CONNECTION CREATE (%u bytes long) sent!\n",
483 * Creates a path ack message in buf and frees all unused resources.
485 * @param c Connection to send an ACK on.
486 * @param size number of bytes available in buf
487 * @param buf where the callee should write the message
489 * @return number of bytes written to buf
492 send_core_connection_ack (struct MeshConnection *c, size_t size, void *buf)
494 struct GNUNET_MESH_ConnectionACK *msg = buf;
496 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION ACK...\n");
497 if (sizeof (struct GNUNET_MESH_ConnectionACK) > size)
502 msg->header.size = htons (sizeof (struct GNUNET_MESH_ConnectionACK));
503 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK);
504 msg->cid = *GMC_get_id (c);
506 LOG (GNUNET_ERROR_TYPE_DEBUG, "CONNECTION ACK sent!\n");
507 return sizeof (struct GNUNET_MESH_ConnectionACK);
511 /******************************************************************************/
512 /******************************** STATIC ***********************************/
513 /******************************************************************************/
517 * Get priority for a queued message.
519 * @param q Queued message
521 * @return CORE priority to use.
523 static enum GNUNET_CORE_Priority
524 get_priority (struct MeshPeerQueue *q)
526 enum GNUNET_CORE_Priority low;
527 enum GNUNET_CORE_Priority high;
532 return GNUNET_CORE_PRIO_BACKGROUND;
535 /* Relayed traffic has lower priority, our own traffic has higher */
536 if (NULL == q->c || GNUNET_NO == GMC_is_origin (q->c, q->fwd))
538 low = GNUNET_CORE_PRIO_BEST_EFFORT;
539 high = GNUNET_CORE_PRIO_URGENT;
543 low = GNUNET_CORE_PRIO_URGENT;
544 high = GNUNET_CORE_PRIO_CRITICAL_CONTROL;
547 /* Bulky payload has lower priority, control traffic has higher. */
548 if (GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED == q->type)
556 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
559 * @param key current key code
560 * @param value value in the hash map
561 * @return #GNUNET_YES if we should continue to iterate,
565 shutdown_tunnel (void *cls,
566 const struct GNUNET_PeerIdentity *key,
569 struct MeshPeer *p = value;
570 struct MeshTunnel3 *t = p->tunnel;
579 * Destroy the peer_info and free any allocated resources linked to it
581 * @param peer The peer_info to destroy.
583 * @return GNUNET_OK on success
586 peer_destroy (struct MeshPeer *peer)
588 struct GNUNET_PeerIdentity id;
589 struct MeshPeerPath *p;
590 struct MeshPeerPath *nextp;
592 GNUNET_PEER_resolve (peer->id, &id);
593 GNUNET_PEER_change_rc (peer->id, -1);
595 LOG (GNUNET_ERROR_TYPE_WARNING, "destroying peer %s\n", GNUNET_i2s (&id));
598 GNUNET_CONTAINER_multipeermap_remove (peers, &id, peer))
601 LOG (GNUNET_ERROR_TYPE_WARNING, " not in peermap!!\n");
603 if (NULL != peer->search_h)
605 GMD_search_stop (peer->search_h);
611 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
615 GMT_destroy_empty (peer->tunnel);
622 * Returns if peer is used (has a tunnel or is neighbor).
624 * @param peer Peer to check.
626 * @return #GNUNET_YES if peer is in use.
629 peer_is_used (struct MeshPeer *peer)
631 struct MeshPeerPath *p;
633 if (NULL != peer->tunnel)
636 for (p = peer->path_head; NULL != p; p = p->next)
646 * Iterator over all the peers to get the oldest timestamp.
648 * @param cls Closure (unsued).
649 * @param key ID of the peer.
650 * @param value Peer_Info of the peer.
653 peer_get_oldest (void *cls,
654 const struct GNUNET_PeerIdentity *key,
657 struct MeshPeer *p = value;
658 struct GNUNET_TIME_Absolute *abs = cls;
660 /* Don't count active peers */
661 if (GNUNET_YES == peer_is_used (p))
664 if (abs->abs_value_us < p->last_contact.abs_value_us)
665 abs->abs_value_us = p->last_contact.abs_value_us;
672 * Iterator over all the peers to remove the oldest entry.
674 * @param cls Closure (unsued).
675 * @param key ID of the peer.
676 * @param value Peer_Info of the peer.
679 peer_timeout (void *cls,
680 const struct GNUNET_PeerIdentity *key,
683 struct MeshPeer *p = value;
684 struct GNUNET_TIME_Absolute *abs = cls;
686 LOG (GNUNET_ERROR_TYPE_WARNING,
687 "peer %s timeout\n", GNUNET_i2s (key));
689 if (p->last_contact.abs_value_us == abs->abs_value_us &&
690 GNUNET_NO == peer_is_used (p))
700 * Delete oldest unused peer.
703 peer_delete_oldest (void)
705 struct GNUNET_TIME_Absolute abs;
707 abs = GNUNET_TIME_UNIT_FOREVER_ABS;
709 GNUNET_CONTAINER_multipeermap_iterate (peers,
712 GNUNET_CONTAINER_multipeermap_iterate (peers,
719 * Choose the best (yet unused) path towards a peer,
720 * considering the tunnel properties.
722 * @param peer The destination peer.
724 * @return Best current known path towards the peer, if any.
726 static struct MeshPeerPath *
727 peer_get_best_path (const struct MeshPeer *peer)
729 struct MeshPeerPath *best_p;
730 struct MeshPeerPath *p;
731 unsigned int best_cost;
734 best_cost = UINT_MAX;
736 for (p = peer->path_head; NULL != p; p = p->next)
738 if (GNUNET_YES == GMT_is_path_used (peer->tunnel, p))
739 continue; /* If path is already in use, skip it. */
741 if (GNUNET_NO == path_is_valid (p))
742 continue; /* Don't use invalid paths. */
744 if ((cost = GMT_get_path_cost (peer->tunnel, p)) < best_cost)
755 queue_is_sendable (struct MeshPeerQueue *q)
757 /* Is PID-independent? */
760 case GNUNET_MESSAGE_TYPE_MESH_ACK:
761 case GNUNET_MESSAGE_TYPE_MESH_POLL:
762 case GNUNET_MESSAGE_TYPE_MESH_KX:
763 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
764 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
765 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
766 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
767 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
770 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
777 if (GMC_is_sendable (q->c, q->fwd))
785 * Get first sendable message.
787 * @param peer The destination peer.
789 * @return Best current known path towards the peer, if any.
791 static struct MeshPeerQueue *
792 peer_get_first_message (const struct MeshPeer *peer)
794 struct MeshPeerQueue *q;
796 for (q = peer->queue_head; NULL != q; q = q->next)
798 if (queue_is_sendable (q))
807 * Function to process paths received for a new peer addition. The recorded
808 * paths form the initial tunnel, which can be optimized later.
809 * Called on each result obtained for the DHT search.
815 search_handler (void *cls, const struct MeshPeerPath *path)
817 struct MeshPeer *peer = cls;
818 unsigned int connection_count;
820 GMP_add_path_to_all (path, GNUNET_NO);
822 /* Count connections */
823 connection_count = GMT_count_connections (peer->tunnel);
825 /* If we already have 3 (or more (?!)) connections, it's enough */
826 if (3 <= connection_count)
829 if (MESH_TUNNEL3_SEARCHING == GMT_get_cstate (peer->tunnel))
831 LOG (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
840 * Core callback to write a queued packet to core buffer
842 * @param cls Closure (peer info).
843 * @param size Number of bytes available in buf.
844 * @param buf Where the to write the message.
846 * @return number of bytes written to buf
849 queue_send (void *cls, size_t size, void *buf)
851 struct MeshPeer *peer = cls;
852 struct MeshConnection *c;
853 struct MeshPeerQueue *queue;
854 const struct GNUNET_PeerIdentity *dst_id;
857 peer->core_transmit = NULL;
858 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Queue send towards %s (max %u)\n",
859 GMP_2s (peer), size);
861 if (NULL == buf || 0 == size)
863 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
868 queue = peer_get_first_message (peer);
871 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
876 dst_id = GNUNET_PEER_resolve2 (peer->id);
877 LOG (GNUNET_ERROR_TYPE_DEBUG, "* on connection %s\n", GMC_2s (c));
878 /* Check if buffer size is enough for the message */
879 if (queue->size > size)
881 LOG (GNUNET_ERROR_TYPE_WARNING, "not enough room (%u vs %u), reissue\n",
883 peer->core_transmit =
884 GNUNET_CORE_notify_transmit_ready (core_handle,
885 GNUNET_NO, get_priority (queue),
886 GNUNET_TIME_UNIT_FOREVER_REL,
893 LOG (GNUNET_ERROR_TYPE_DEBUG, "* size %u ok\n", queue->size);
898 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
899 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
900 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
901 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
902 case GNUNET_MESSAGE_TYPE_MESH_KX:
903 case GNUNET_MESSAGE_TYPE_MESH_ACK:
904 case GNUNET_MESSAGE_TYPE_MESH_POLL:
905 LOG (GNUNET_ERROR_TYPE_DEBUG, "* raw: %s\n", GM_m2s (queue->type));
906 data_size = send_core_data_raw (queue->cls, size, buf);
908 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
909 LOG (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
910 if (GMC_is_origin (c, GNUNET_YES))
911 data_size = send_core_connection_create (queue->c, size, buf);
913 data_size = send_core_data_raw (queue->cls, size, buf);
915 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
916 LOG (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
917 if (GMC_is_origin (c, GNUNET_NO) ||
918 GMC_is_origin (c, GNUNET_YES))
919 data_size = send_core_connection_ack (queue->c, size, buf);
921 data_size = send_core_data_raw (queue->cls, size, buf);
923 case GNUNET_MESSAGE_TYPE_MESH_DATA:
924 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
925 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
926 /* This should be encapsulted */
932 LOG (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n", queue->type);
936 if (0 < drop_percent &&
937 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
939 LOG (GNUNET_ERROR_TYPE_WARNING, "DD %s on connection\n",
940 GM_m2s (queue->type), GMC_2s (c));
945 LOG (GNUNET_ERROR_TYPE_INFO,
946 "ss %s on connection %s (%p) %s (size %u)\n",
947 GM_m2s (queue->type), GMC_2s (c), c, GM_f2s (queue->fwd), data_size);
950 /* Free queue, but cls was freed by send_core_* */
951 GMP_queue_destroy (queue, GNUNET_NO);
953 /* If more data in queue, send next */
954 queue = peer_get_first_message (peer);
957 LOG (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
958 if (NULL == peer->core_transmit)
960 peer->core_transmit =
961 GNUNET_CORE_notify_transmit_ready (core_handle,
962 GNUNET_NO, get_priority (queue),
963 GNUNET_TIME_UNIT_FOREVER_REL,
968 queue->start_waiting = GNUNET_TIME_absolute_get ();
972 LOG (GNUNET_ERROR_TYPE_DEBUG,
973 "* tmt rdy called somewhere else\n");
975 // GMC_start_poll (); FIXME needed?
979 // GMC_stop_poll(); FIXME needed?
982 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
987 /******************************************************************************/
988 /******************************** API ***********************************/
989 /******************************************************************************/
993 * Free a transmission that was already queued with all resources
994 * associated to the request.
996 * @param queue Queue handler to cancel.
997 * @param clear_cls Is it necessary to free associated cls?
1000 GMP_queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
1002 struct MeshPeer *peer;
1006 if (GNUNET_YES == clear_cls)
1008 LOG (GNUNET_ERROR_TYPE_DEBUG, "# queue destroy type %s\n",
1009 GM_m2s (queue->type));
1010 switch (queue->type)
1012 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
1013 LOG (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
1015 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
1016 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
1017 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
1018 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
1019 case GNUNET_MESSAGE_TYPE_MESH_KX:
1020 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
1021 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1022 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1023 GNUNET_free_non_null (queue->cls);
1028 LOG (GNUNET_ERROR_TYPE_ERROR, "# type %s unknown!\n",
1029 GM_m2s (queue->type));
1032 GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
1034 if (queue->type != GNUNET_MESSAGE_TYPE_MESH_ACK &&
1035 queue->type != GNUNET_MESSAGE_TYPE_MESH_POLL)
1040 if (NULL != queue->callback)
1042 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Calling callback\n");
1043 queue->callback (queue->callback_cls,
1044 queue->c, queue->type,
1045 queue->fwd, queue->size,
1046 GNUNET_TIME_absolute_get_duration (queue->start_waiting));
1049 GNUNET_free (queue);
1054 * @brief Queue and pass message to core when possible.
1056 * @param peer Peer towards which to queue the message.
1057 * @param cls Closure (@c type dependant). It will be used by queue_send to
1058 * build the message to be sent if not already prebuilt.
1059 * @param type Type of the message, 0 for a raw message.
1060 * @param size Size of the message.
1061 * @param c Connection this message belongs to (can be NULL).
1062 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
1063 * @param cont Continuation to be called once CORE has taken the message.
1064 * @param cont_cls Closure for @c cont.
1066 * @return Handle to cancel the message before it is sent. Once cont is called
1067 * message has been sent and therefore the handle is no longer valid.
1069 struct MeshPeerQueue *
1070 GMP_queue_add (struct MeshPeer *peer, void *cls, uint16_t type, size_t size,
1071 struct MeshConnection *c, int fwd,
1072 GMP_sent cont, void *cont_cls)
1074 struct MeshPeerQueue *queue;
1078 LOG (GNUNET_ERROR_TYPE_INFO, "qq %s on connection %s (%p) %s towards %s (size %u)\n",
1079 GM_m2s (type), GMC_2s (c), c, GM_f2s (fwd), GMP_2s(peer), size);
1081 if (NULL == peer->connections)
1083 /* We are not connected to this peer, ignore request. */
1084 LOG (GNUNET_ERROR_TYPE_DEBUG, "WARNING %s not a neighbor\n", GMP_2s (peer));
1085 GNUNET_STATISTICS_update (stats, "# messages dropped due to wrong hop", 1,
1092 if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
1093 GNUNET_MESSAGE_TYPE_MESH_ACK == type)
1098 LOG (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
1100 call_core = NULL == c ? GNUNET_YES : GMC_is_sendable (c, fwd);
1101 queue = GNUNET_new (struct MeshPeerQueue);
1108 queue->callback = cont;
1109 queue->callback_cls = cont_cls;
1112 GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
1117 GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
1118 call_core = GNUNET_YES;
1121 if (NULL == peer->core_transmit && GNUNET_YES == call_core)
1123 LOG (GNUNET_ERROR_TYPE_DEBUG,
1124 "calling core tmt rdy towards %s for %u bytes\n",
1125 GMP_2s (peer), size);
1126 peer->core_transmit =
1127 GNUNET_CORE_notify_transmit_ready (core_handle,
1128 GNUNET_NO, get_priority (queue),
1129 GNUNET_TIME_UNIT_FOREVER_REL,
1130 GNUNET_PEER_resolve2 (peer->id),
1134 queue->start_waiting = GNUNET_TIME_absolute_get ();
1138 LOG (GNUNET_ERROR_TYPE_DEBUG,
1139 "core tmt rdy towards %s already called\n",
1148 * Cancel all queued messages to a peer that belong to a certain connection.
1150 * @param peer Peer towards whom to cancel.
1151 * @param c Connection whose queued messages to cancel. Might be destroyed by
1152 * the sent continuation call.
1155 GMP_queue_cancel (struct MeshPeer *peer, struct MeshConnection *c)
1157 struct MeshPeerQueue *q;
1158 struct MeshPeerQueue *next;
1159 struct MeshPeerQueue *prev;
1161 for (q = peer->queue_head; NULL != q; q = next)
1166 LOG (GNUNET_ERROR_TYPE_DEBUG, "GMP_cancel_queue %s\n", GM_m2s (q->type));
1167 GMP_queue_destroy (q, GNUNET_YES);
1169 /* Get next from prev, q->next might be already freed:
1170 * queue destroy -> callback -> GMC_destroy -> cancel_queues -> here
1173 next = peer->queue_head;
1182 if (NULL == peer->queue_head)
1184 if (NULL != peer->core_transmit)
1186 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit);
1187 peer->core_transmit = NULL;
1194 * Get the first transmittable message for a connection.
1196 * @param peer Neighboring peer.
1197 * @param c Connection.
1199 * @return First transmittable message.
1201 static struct MeshPeerQueue *
1202 connection_get_first_message (struct MeshPeer *peer, struct MeshConnection *c)
1204 struct MeshPeerQueue *q;
1206 for (q = peer->queue_head; NULL != q; q = q->next)
1210 if (queue_is_sendable (q))
1212 LOG (GNUNET_ERROR_TYPE_DEBUG, " sendable!!\n");
1215 LOG (GNUNET_ERROR_TYPE_DEBUG, " not sendable\n");
1223 GMP_queue_unlock (struct MeshPeer *peer, struct MeshConnection *c)
1225 struct MeshPeerQueue *q;
1228 if (NULL != peer->core_transmit)
1230 LOG (GNUNET_ERROR_TYPE_DEBUG, " already unlocked!\n");
1231 return; /* Already unlocked */
1234 q = connection_get_first_message (peer, c);
1237 LOG (GNUNET_ERROR_TYPE_DEBUG, " queue empty!\n");
1238 return; /* Nothing to transmit */
1242 peer->core_transmit =
1243 GNUNET_CORE_notify_transmit_ready (core_handle,
1244 GNUNET_NO, get_priority (q),
1245 GNUNET_TIME_UNIT_FOREVER_REL,
1246 GNUNET_PEER_resolve2 (peer->id),
1254 * Initialize the peer subsystem.
1256 * @param c Configuration.
1259 GMP_init (const struct GNUNET_CONFIGURATION_Handle *c)
1261 LOG (GNUNET_ERROR_TYPE_DEBUG, "init\n");
1262 peers = GNUNET_CONTAINER_multipeermap_create (128, GNUNET_NO);
1264 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
1267 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1268 "MESH", "MAX_PEERS", "USING DEFAULT");
1273 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
1280 LOG (GNUNET_ERROR_TYPE_WARNING,
1281 "\n***************************************\n"
1282 "Mesh is running with drop mode enabled.\n"
1283 "This is NOT a good idea!\n"
1284 "Remove the DROP_PERCENT option from your configuration.\n"
1285 "***************************************\n");
1288 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
1289 NULL, /* Closure passed to MESH functions */
1290 &core_init, /* Call core_init once connected */
1291 &core_connect, /* Handle connects */
1292 &core_disconnect, /* remove peers on disconnects */
1293 NULL, /* Don't notify about all incoming messages */
1294 GNUNET_NO, /* For header only in notification */
1295 NULL, /* Don't notify about all outbound messages */
1296 GNUNET_NO, /* For header-only out notification */
1297 core_handlers); /* Register these handlers */
1298 transport_handle = GNUNET_TRANSPORT_connect (c, &my_full_id,
1300 NULL, NULL, NULL); /* Notify callbacks */
1302 if (NULL == core_handle || NULL == transport_handle)
1305 GNUNET_SCHEDULER_shutdown ();
1312 * Shut down the peer subsystem.
1317 GNUNET_CONTAINER_multipeermap_iterate (peers, &shutdown_tunnel, NULL);
1319 if (core_handle != NULL)
1321 GNUNET_CORE_disconnect (core_handle);
1324 if (transport_handle != NULL)
1326 GNUNET_TRANSPORT_disconnect (transport_handle);
1327 transport_handle = NULL;
1329 GNUNET_PEER_change_rc (myid, -1);
1333 * Retrieve the MeshPeer stucture associated with the peer, create one
1334 * and insert it in the appropriate structures if the peer is not known yet.
1336 * @param peer_id Full identity of the peer.
1338 * @return Existing or newly created peer structure.
1341 GMP_get (const struct GNUNET_PeerIdentity *peer_id)
1343 struct MeshPeer *peer;
1345 peer = GNUNET_CONTAINER_multipeermap_get (peers, peer_id);
1348 peer = GNUNET_new (struct MeshPeer);
1349 if (GNUNET_CONTAINER_multipeermap_size (peers) > max_peers)
1351 peer_delete_oldest ();
1353 GNUNET_CONTAINER_multipeermap_put (peers, peer_id, peer,
1354 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1355 peer->id = GNUNET_PEER_intern (peer_id);
1357 peer->last_contact = GNUNET_TIME_absolute_get();
1364 * Retrieve the MeshPeer stucture associated with the peer, create one
1365 * and insert it in the appropriate structures if the peer is not known yet.
1367 * @param peer Short identity of the peer.
1369 * @return Existing or newly created peer structure.
1372 GMP_get_short (const GNUNET_PEER_Id peer)
1374 return GMP_get (GNUNET_PEER_resolve2 (peer));
1379 * Try to connect to a peer on transport level.
1381 * @param cls Closure (peer).
1382 * @param tc TaskContext.
1385 try_connect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1387 struct MeshPeer *peer = cls;
1389 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1392 GNUNET_TRANSPORT_try_connect (transport_handle,
1393 GNUNET_PEER_resolve2 (peer->id), NULL, NULL);
1398 * Try to establish a new connection to this peer (in its tunnel).
1399 * If the peer doesn't have any path to it yet, try to get one.
1400 * If the peer already has some path, send a CREATE CONNECTION towards it.
1402 * @param peer Peer to connect to.
1405 GMP_connect (struct MeshPeer *peer)
1407 struct MeshTunnel3 *t;
1408 struct MeshPeerPath *p;
1409 struct MeshConnection *c;
1412 LOG (GNUNET_ERROR_TYPE_DEBUG, "peer_connect towards %s\n", GMP_2s (peer));
1414 /* If we have a current hello, try to connect using it. */
1415 GMP_try_connect (peer);
1419 rerun_search = GNUNET_NO;
1421 if (NULL != peer->path_head)
1423 LOG (GNUNET_ERROR_TYPE_DEBUG, " some path exists\n");
1424 p = peer_get_best_path (peer);
1427 LOG (GNUNET_ERROR_TYPE_DEBUG, " %u hops\n", p->length);
1428 c = GMT_use_path (t, p);
1431 /* This case can happen when the path includes a first hop that is
1432 * not yet known to be connected.
1434 * This happens quite often during testing when running mesh
1435 * under valgrind: core connect notifications come very late and the
1436 * DHT result has already come and created a valid path.
1437 * In this case, the peer->connections hashmap will be NULL and
1438 * tunnel_use_path will not be able to create a connection from that
1441 * Re-running the DHT GET should give core time to callback.
1443 * GMT_use_path -> GMC_new -> register_neighbors takes care of
1444 * updating statistics about this issue.
1446 rerun_search = GNUNET_YES;
1450 GMC_send_create (c);
1456 LOG (GNUNET_ERROR_TYPE_DEBUG, " but is NULL, all paths are in use\n");
1460 if (NULL != peer->search_h && GNUNET_YES == rerun_search)
1462 GMD_search_stop (peer->search_h);
1463 peer->search_h = NULL;
1464 LOG (GNUNET_ERROR_TYPE_DEBUG,
1465 " Stopping DHT GET for peer %s\n",
1469 if (NULL == peer->search_h)
1471 const struct GNUNET_PeerIdentity *id;
1473 id = GNUNET_PEER_resolve2 (peer->id);
1474 LOG (GNUNET_ERROR_TYPE_DEBUG,
1475 " Starting DHT GET for peer %s\n", GMP_2s (peer));
1476 peer->search_h = GMD_search (id, &search_handler, peer);
1477 if (MESH_TUNNEL3_NEW == GMT_get_cstate (t))
1478 GMT_change_cstate (t, MESH_TUNNEL3_SEARCHING);
1484 * Chech whether there is a direct (core level) connection to peer.
1486 * @param peer Peer to check.
1488 * @return #GNUNET_YES if there is a direct connection.
1491 GMP_is_neighbor (const struct MeshPeer *peer)
1493 struct MeshPeerPath *path;
1495 if (NULL == peer->connections)
1498 for (path = peer->path_head; NULL != path; path = path->next)
1500 if (3 > path->length)
1504 /* Is not a neighbor but connections is not NULL, probably disconnecting */
1510 * Create and initialize a new tunnel towards a peer, in case it has none.
1511 * In case the peer already has a tunnel, nothing is done.
1513 * Does not generate any traffic, just creates the local data structures.
1515 * @param peer Peer towards which to create the tunnel.
1518 GMP_add_tunnel (struct MeshPeer *peer)
1520 if (NULL != peer->tunnel)
1522 peer->tunnel = GMT_new (peer);
1527 * Add a connection to a neighboring peer.
1529 * Store that the peer is the first hop of the connection in one
1530 * direction and that on peer disconnect the connection must be
1531 * notified and destroyed, for it will no longer be valid.
1533 * @param peer Peer to add connection to.
1534 * @param c Connection to add.
1536 * @return GNUNET_OK on success.
1539 GMP_add_connection (struct MeshPeer *peer,
1540 struct MeshConnection *c)
1543 LOG (GNUNET_ERROR_TYPE_DEBUG, "adding connection %s\n", GMC_2s (c));
1544 LOG (GNUNET_ERROR_TYPE_DEBUG, "to peer %s\n", GMP_2s (peer));
1546 if (NULL == peer->connections)
1549 LOG (GNUNET_ERROR_TYPE_DEBUG,
1550 "Peer %s is not a neighbor!\n",
1552 return GNUNET_SYSERR;
1554 LOG (GNUNET_ERROR_TYPE_DEBUG,
1555 "peer %s ok, has %u connections.\n",
1556 GMP_2s (peer), GNUNET_CONTAINER_multihashmap_size (peer->connections));
1557 result = GNUNET_CONTAINER_multihashmap_put (peer->connections,
1560 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1561 LOG (GNUNET_ERROR_TYPE_DEBUG,
1562 " now has %u connections.\n",
1563 GNUNET_CONTAINER_multihashmap_size (peer->connections));
1564 LOG (GNUNET_ERROR_TYPE_DEBUG, "result %u\n", result);
1571 * Add the path to the peer and update the path used to reach it in case this
1574 * @param peer Destination peer to add the path to.
1575 * @param path New path to add. Last peer must be the peer in arg 1.
1576 * Path will be either used of freed if already known.
1577 * @param trusted Do we trust that this path is real?
1579 * @return path if path was taken, pointer to existing duplicate if exists
1582 struct MeshPeerPath *
1583 GMP_add_path (struct MeshPeer *peer, struct MeshPeerPath *path,
1586 struct MeshPeerPath *aux;
1590 LOG (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1591 path->length, GMP_2s (peer));
1593 if ((NULL == peer) || (NULL == path))
1596 path_destroy (path);
1599 if (path->peers[path->length - 1] != peer->id)
1602 path_destroy (path);
1605 if (2 >= path->length && GNUNET_NO == trusted)
1607 /* Only allow CORE to tell us about direct paths */
1608 path_destroy (path);
1611 for (l = 1; l < path->length; l++)
1613 if (path->peers[l] == myid)
1615 LOG (GNUNET_ERROR_TYPE_DEBUG, " shortening path by %u\n", l);
1616 for (l2 = 0; l2 < path->length - l; l2++)
1618 path->peers[l2] = path->peers[l + l2];
1622 path->peers = GNUNET_realloc (path->peers,
1623 path->length * sizeof (GNUNET_PEER_Id));
1627 LOG (GNUNET_ERROR_TYPE_DEBUG, " final length: %u\n", path->length);
1629 l = path_get_length (path);
1632 path_destroy (path);
1636 GNUNET_assert (peer->id == path->peers[path->length - 1]);
1637 for (aux = peer->path_head; aux != NULL; aux = aux->next)
1639 l2 = path_get_length (aux);
1642 LOG (GNUNET_ERROR_TYPE_DEBUG, " added\n");
1643 GNUNET_CONTAINER_DLL_insert_before (peer->path_head,
1644 peer->path_tail, aux, path);
1645 if (NULL != peer->tunnel && 3 < GMT_count_connections (peer->tunnel))
1653 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1655 LOG (GNUNET_ERROR_TYPE_DEBUG, " already known\n");
1656 path_destroy (path);
1661 GNUNET_CONTAINER_DLL_insert_tail (peer->path_head, peer->path_tail,
1663 LOG (GNUNET_ERROR_TYPE_DEBUG, " added last\n");
1664 if (NULL != peer->tunnel && 3 < GMT_count_connections (peer->tunnel))
1673 * Add the path to the origin peer and update the path used to reach it in case
1674 * this is the shortest.
1675 * The path is given in peer_info -> destination, therefore we turn the path
1676 * upside down first.
1678 * @param peer Peer to add the path to, being the origin of the path.
1679 * @param path New path to add after being inversed.
1680 * Path will be either used or freed.
1681 * @param trusted Do we trust that this path is real?
1683 * @return path if path was taken, pointer to existing duplicate if exists
1686 struct MeshPeerPath *
1687 GMP_add_path_to_origin (struct MeshPeer *peer,
1688 struct MeshPeerPath *path,
1694 return GMP_add_path (peer, path, trusted);
1699 * Adds a path to the info of all the peers in the path
1701 * @param p Path to process.
1702 * @param confirmed Whether we know if the path works or not.
1705 GMP_add_path_to_all (const struct MeshPeerPath *p, int confirmed)
1709 /* TODO: invert and add */
1710 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1711 for (i++; i < p->length; i++)
1713 struct MeshPeer *aux;
1714 struct MeshPeerPath *copy;
1716 aux = GMP_get_short (p->peers[i]);
1717 copy = path_duplicate (p);
1718 copy->length = i + 1;
1719 GMP_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1725 * Remove any path to the peer that has the extact same peers as the one given.
1727 * @param peer Peer to remove the path from.
1728 * @param path Path to remove. Is always destroyed .
1731 GMP_remove_path (struct MeshPeer *peer, struct MeshPeerPath *path)
1733 struct MeshPeerPath *iter;
1734 struct MeshPeerPath *next;
1736 GNUNET_assert (myid == path->peers[0]);
1737 GNUNET_assert (peer->id == path->peers[path->length - 1]);
1739 for (iter = peer->path_head; NULL != iter; iter = next)
1742 if (0 == memcmp (path->peers, iter->peers,
1743 sizeof (GNUNET_PEER_Id) * path->length))
1745 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, iter);
1746 path_destroy (iter);
1751 path_destroy (path);
1756 * Remove a connection from a neighboring peer.
1758 * @param peer Peer to remove connection from.
1759 * @param c Connection to remove.
1761 * @return GNUNET_OK on success.
1764 GMP_remove_connection (struct MeshPeer *peer,
1765 const struct MeshConnection *c)
1767 LOG (GNUNET_ERROR_TYPE_DEBUG, "removing connection %s\n", GMC_2s (c));
1768 LOG (GNUNET_ERROR_TYPE_DEBUG, "from peer %s\n", GMP_2s (peer));
1770 if (NULL == peer || NULL == peer->connections)
1772 LOG (GNUNET_ERROR_TYPE_DEBUG,
1773 "Peer %s is not a neighbor!\n",
1775 return GNUNET_SYSERR;
1777 LOG (GNUNET_ERROR_TYPE_DEBUG,
1778 "peer %s ok, has %u connections.\n",
1779 GMP_2s (peer), GNUNET_CONTAINER_multihashmap_size (peer->connections));
1781 return GNUNET_CONTAINER_multihashmap_remove (peer->connections,
1787 * Start the DHT search for new paths towards the peer: we don't have
1788 * enough good connections.
1790 * @param peer Destination peer.
1793 GMP_start_search (struct MeshPeer *peer)
1795 if (NULL != peer->search_h)
1801 peer->search_h = GMD_search (GMP_get_id (peer), &search_handler, peer);
1806 * Stop the DHT search for new paths towards the peer: we already have
1807 * enough good connections.
1809 * @param peer Destination peer.
1812 GMP_stop_search (struct MeshPeer *peer)
1814 if (NULL == peer->search_h)
1820 GMD_search_stop (peer->search_h);
1821 peer->search_h = NULL;
1826 * Get the Full ID of a peer.
1828 * @param peer Peer to get from.
1830 * @return Full ID of peer.
1832 const struct GNUNET_PeerIdentity *
1833 GMP_get_id (const struct MeshPeer *peer)
1835 return GNUNET_PEER_resolve2 (peer->id);
1840 * Get the Short ID of a peer.
1842 * @param peer Peer to get from.
1844 * @return Short ID of peer.
1847 GMP_get_short_id (const struct MeshPeer *peer)
1860 GMP_set_tunnel (struct MeshPeer *peer, struct MeshTunnel3 *t)
1867 * Get the tunnel towards a peer.
1869 * @param peer Peer to get from.
1871 * @return Tunnel towards peer.
1873 struct MeshTunnel3 *
1874 GMP_get_tunnel (const struct MeshPeer *peer)
1876 return peer->tunnel;
1881 * Set the hello message.
1883 * @param peer Peer whose message to set.
1884 * @param hello Hello message.
1887 GMP_set_hello (struct MeshPeer *peer, const struct GNUNET_HELLO_Message *hello)
1889 struct GNUNET_HELLO_Message *old;
1892 LOG (GNUNET_ERROR_TYPE_DEBUG, "set hello for %s\n", GMP_2s (peer));
1896 old = GMP_get_hello (peer);
1899 size = GNUNET_HELLO_size (hello);
1900 LOG (GNUNET_ERROR_TYPE_DEBUG, " new (%u bytes)\n", size);
1901 peer->hello = GNUNET_malloc (size);
1902 memcpy (peer->hello, hello, size);
1906 peer->hello = GNUNET_HELLO_merge (old, hello);
1907 LOG (GNUNET_ERROR_TYPE_DEBUG, " merge into %p (%u bytes)\n",
1908 peer->hello, GNUNET_HELLO_size (hello));
1915 * Get the hello message.
1917 * @param peer Peer whose message to get.
1919 * @return Hello message.
1921 struct GNUNET_HELLO_Message *
1922 GMP_get_hello (struct MeshPeer *peer)
1924 struct GNUNET_TIME_Absolute expiration;
1925 struct GNUNET_TIME_Relative remaining;
1927 if (NULL == peer->hello)
1930 expiration = GNUNET_HELLO_get_last_expiration (peer->hello);
1931 remaining = GNUNET_TIME_absolute_get_remaining (expiration);
1932 if (0 == remaining.rel_value_us)
1934 LOG (GNUNET_ERROR_TYPE_DEBUG, " get - hello expired on %s\n",
1935 GNUNET_STRINGS_absolute_time_to_string (expiration));
1936 GNUNET_free (peer->hello);
1944 * Try to connect to a peer on TRANSPORT level.
1946 * @param peer Peer to whom to connect.
1949 GMP_try_connect (struct MeshPeer *peer)
1951 struct GNUNET_HELLO_Message *hello;
1952 struct GNUNET_MessageHeader *mh;
1954 hello = GMP_get_hello (peer);
1958 mh = GNUNET_HELLO_get_header (hello);
1959 GNUNET_TRANSPORT_offer_hello (transport_handle, mh, try_connect, peer);
1964 * Count the number of known paths toward the peer.
1966 * @param peer Peer to get path info.
1968 * @return Number of known paths.
1971 GMP_count_paths (const struct MeshPeer *peer)
1973 struct MeshPeerPath *iter;
1976 for (iter = peer->path_head, i = 0; NULL != iter; iter = iter->next)
1984 * Iterate all known peers.
1986 * @param iter Iterator.
1987 * @param cls Closure for @c iter.
1990 GMP_iterate_all (GNUNET_CONTAINER_PeerMapIterator iter, void *cls)
1992 GNUNET_CONTAINER_multipeermap_iterate (peers, iter, cls);
1997 * Get the static string for a peer ID.
2001 * @return Static string for it's ID.
2004 GMP_2s (const struct MeshPeer *peer)
2008 return GNUNET_i2s (GNUNET_PEER_resolve2 (peer->id));