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;
280 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer connected\n");
281 LOG (GNUNET_ERROR_TYPE_DEBUG, " %s\n", GNUNET_i2s (&my_full_id));
285 LOG (GNUNET_ERROR_TYPE_DEBUG, " (self)\n");
290 LOG (GNUNET_ERROR_TYPE_DEBUG, " %s\n", GNUNET_i2s (peer));
292 path->peers[1] = mp->id;
293 GNUNET_PEER_change_rc (mp->id, 1);
294 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
296 path->peers[0] = myid;
297 GNUNET_PEER_change_rc (myid, 1);
298 GMP_add_path (mp, path, GNUNET_YES);
300 mp->connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
306 * Method called whenever a peer disconnects.
309 * @param peer peer identity this notification is about
312 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
315 struct MeshPeerPath *direct_path;
317 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer disconnected\n");
318 p = GNUNET_CONTAINER_multipeermap_get (peers, peer);
325 LOG (GNUNET_ERROR_TYPE_DEBUG, " (self: %s)\n", GMP_2s (p));
327 LOG (GNUNET_ERROR_TYPE_DEBUG, " %s\n", GMP_2s (p));
329 direct_path = pop_direct_path (p);
330 GNUNET_CONTAINER_multihashmap_iterate (p->connections, ¬ify_broken, p);
331 GNUNET_CONTAINER_multihashmap_destroy (p->connections);
332 p->connections = NULL;
333 if (NULL != p->core_transmit)
335 GNUNET_CORE_notify_transmit_ready_cancel (p->core_transmit);
336 p->core_transmit = NULL;
338 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
340 path_destroy (direct_path);
346 * Functions to handle messages from core
348 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
349 {&GMC_handle_create, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE, 0},
350 {&GMC_handle_confirm, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
351 sizeof (struct GNUNET_MESH_ConnectionACK)},
352 {&GMC_handle_broken, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN,
353 sizeof (struct GNUNET_MESH_ConnectionBroken)},
354 {&GMC_handle_destroy, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY,
355 sizeof (struct GNUNET_MESH_ConnectionDestroy)},
356 {&GMC_handle_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
357 sizeof (struct GNUNET_MESH_ACK)},
358 {&GMC_handle_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
359 sizeof (struct GNUNET_MESH_Poll)},
360 {&GMC_handle_encrypted, GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED, 0},
361 {&GMC_handle_kx, GNUNET_MESSAGE_TYPE_MESH_KX, 0},
367 * To be called on core init/fail.
369 * @param cls Closure (config)
370 * @param identity the public identity of this peer
373 core_init (void *cls,
374 const struct GNUNET_PeerIdentity *identity)
376 const struct GNUNET_CONFIGURATION_Handle *c = cls;
379 LOG (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
380 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)))
382 LOG (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
383 LOG (GNUNET_ERROR_TYPE_ERROR, " core id %s\n", GNUNET_i2s (identity));
384 LOG (GNUNET_ERROR_TYPE_ERROR, " my id %s\n", GNUNET_i2s (&my_full_id));
385 GNUNET_CORE_disconnect (core_handle);
386 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
387 NULL, /* Closure passed to MESH functions */
388 &core_init, /* Call core_init once connected */
389 &core_connect, /* Handle connects */
390 &core_disconnect, /* remove peers on disconnects */
391 NULL, /* Don't notify about all incoming messages */
392 GNUNET_NO, /* For header only in notification */
393 NULL, /* Don't notify about all outbound messages */
394 GNUNET_NO, /* For header-only out notification */
395 core_handlers); /* Register these handlers */
404 * Core callback to write a pre-constructed data packet to core buffer
406 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
407 * @param size Number of bytes available in buf.
408 * @param buf Where the to write the message.
410 * @return number of bytes written to buf
413 send_core_data_raw (void *cls, size_t size, void *buf)
415 struct GNUNET_MessageHeader *msg = cls;
418 GNUNET_assert (NULL != msg);
419 total_size = ntohs (msg->size);
421 if (total_size > size)
426 memcpy (buf, msg, total_size);
433 * Function to send a create connection message to a peer.
435 * @param c Connection to create.
436 * @param size number of bytes available in buf
437 * @param buf where the callee should write the message
438 * @return number of bytes written to buf
441 send_core_connection_create (struct MeshConnection *c, size_t size, void *buf)
443 struct GNUNET_MESH_ConnectionCreate *msg;
444 struct GNUNET_PeerIdentity *peer_ptr;
445 const struct MeshPeerPath *p = GMC_get_path (c);
452 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION CREATE...\n");
454 sizeof (struct GNUNET_MESH_ConnectionCreate) +
455 p->length * sizeof (struct GNUNET_PeerIdentity);
457 if (size < size_needed || NULL == buf)
462 msg = (struct GNUNET_MESH_ConnectionCreate *) buf;
463 msg->header.size = htons (size_needed);
464 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE);
465 msg->cid = *GMC_get_id (c);
467 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
468 for (i = 0; i < p->length; i++)
470 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
473 LOG (GNUNET_ERROR_TYPE_DEBUG,
474 "CONNECTION CREATE (%u bytes long) sent!\n",
481 * Creates a path ack message in buf and frees all unused resources.
483 * @param c Connection to send an ACK on.
484 * @param size number of bytes available in buf
485 * @param buf where the callee should write the message
487 * @return number of bytes written to buf
490 send_core_connection_ack (struct MeshConnection *c, size_t size, void *buf)
492 struct GNUNET_MESH_ConnectionACK *msg = buf;
494 LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION ACK...\n");
495 if (sizeof (struct GNUNET_MESH_ConnectionACK) > size)
500 msg->header.size = htons (sizeof (struct GNUNET_MESH_ConnectionACK));
501 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK);
502 msg->cid = *GMC_get_id (c);
504 LOG (GNUNET_ERROR_TYPE_DEBUG, "CONNECTION ACK sent!\n");
505 return sizeof (struct GNUNET_MESH_ConnectionACK);
509 /******************************************************************************/
510 /******************************** STATIC ***********************************/
511 /******************************************************************************/
515 * Get priority for a queued message.
517 * @param q Queued message
519 * @return CORE priority to use.
521 static enum GNUNET_CORE_Priority
522 get_priority (struct MeshPeerQueue *q)
524 enum GNUNET_CORE_Priority low;
525 enum GNUNET_CORE_Priority high;
530 return GNUNET_CORE_PRIO_BACKGROUND;
533 /* Relayed traffic has lower priority, our own traffic has higher */
534 if (NULL == q->c || GNUNET_NO == GMC_is_origin (q->c, q->fwd))
536 low = GNUNET_CORE_PRIO_BEST_EFFORT;
537 high = GNUNET_CORE_PRIO_URGENT;
541 low = GNUNET_CORE_PRIO_URGENT;
542 high = GNUNET_CORE_PRIO_CRITICAL_CONTROL;
545 /* Bulky payload has lower priority, control traffic has higher. */
546 if (GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED == q->type)
554 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
557 * @param key current key code
558 * @param value value in the hash map
559 * @return #GNUNET_YES if we should continue to iterate,
563 shutdown_tunnel (void *cls,
564 const struct GNUNET_PeerIdentity *key,
567 struct MeshPeer *p = value;
568 struct MeshTunnel3 *t = p->tunnel;
577 * Destroy the peer_info and free any allocated resources linked to it
579 * @param peer The peer_info to destroy.
581 * @return GNUNET_OK on success
584 peer_destroy (struct MeshPeer *peer)
586 struct GNUNET_PeerIdentity id;
587 struct MeshPeerPath *p;
588 struct MeshPeerPath *nextp;
590 GNUNET_PEER_resolve (peer->id, &id);
591 GNUNET_PEER_change_rc (peer->id, -1);
593 LOG (GNUNET_ERROR_TYPE_WARNING, "destroying peer %s\n", GNUNET_i2s (&id));
596 GNUNET_CONTAINER_multipeermap_remove (peers, &id, peer))
599 LOG (GNUNET_ERROR_TYPE_WARNING, " not in peermap!!\n");
601 if (NULL != peer->search_h)
603 GMD_search_stop (peer->search_h);
609 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
613 GMT_destroy_empty (peer->tunnel);
620 * Returns if peer is used (has a tunnel or is neighbor).
622 * @param peer Peer to check.
624 * @return #GNUNET_YES if peer is in use.
627 peer_is_used (struct MeshPeer *peer)
629 struct MeshPeerPath *p;
631 if (NULL != peer->tunnel)
634 for (p = peer->path_head; NULL != p; p = p->next)
644 * Iterator over all the peers to get the oldest timestamp.
646 * @param cls Closure (unsued).
647 * @param key ID of the peer.
648 * @param value Peer_Info of the peer.
651 peer_get_oldest (void *cls,
652 const struct GNUNET_PeerIdentity *key,
655 struct MeshPeer *p = value;
656 struct GNUNET_TIME_Absolute *abs = cls;
658 /* Don't count active peers */
659 if (GNUNET_YES == peer_is_used (p))
662 if (abs->abs_value_us < p->last_contact.abs_value_us)
663 abs->abs_value_us = p->last_contact.abs_value_us;
670 * Iterator over all the peers to remove the oldest entry.
672 * @param cls Closure (unsued).
673 * @param key ID of the peer.
674 * @param value Peer_Info of the peer.
677 peer_timeout (void *cls,
678 const struct GNUNET_PeerIdentity *key,
681 struct MeshPeer *p = value;
682 struct GNUNET_TIME_Absolute *abs = cls;
684 LOG (GNUNET_ERROR_TYPE_WARNING,
685 "peer %s timeout\n", GNUNET_i2s (key));
687 if (p->last_contact.abs_value_us == abs->abs_value_us &&
688 GNUNET_NO == peer_is_used (p))
698 * Delete oldest unused peer.
701 peer_delete_oldest (void)
703 struct GNUNET_TIME_Absolute abs;
705 abs = GNUNET_TIME_UNIT_FOREVER_ABS;
707 GNUNET_CONTAINER_multipeermap_iterate (peers,
710 GNUNET_CONTAINER_multipeermap_iterate (peers,
717 * Choose the best (yet unused) path towards a peer,
718 * considering the tunnel properties.
720 * @param peer The destination peer.
722 * @return Best current known path towards the peer, if any.
724 static struct MeshPeerPath *
725 peer_get_best_path (const struct MeshPeer *peer)
727 struct MeshPeerPath *best_p;
728 struct MeshPeerPath *p;
729 unsigned int best_cost;
732 best_cost = UINT_MAX;
734 for (p = peer->path_head; NULL != p; p = p->next)
736 if (GNUNET_YES == GMT_is_path_used (peer->tunnel, p))
737 continue; /* If path is already in use, skip it. */
739 if (GNUNET_NO == path_is_valid (p))
740 continue; /* Don't use invalid paths. */
742 if ((cost = GMT_get_path_cost (peer->tunnel, p)) < best_cost)
753 queue_is_sendable (struct MeshPeerQueue *q)
755 /* Is PID-independent? */
758 case GNUNET_MESSAGE_TYPE_MESH_ACK:
759 case GNUNET_MESSAGE_TYPE_MESH_POLL:
760 case GNUNET_MESSAGE_TYPE_MESH_KX:
761 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
762 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
763 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
764 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
765 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
768 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
775 if (GMC_is_sendable (q->c, q->fwd))
783 * Get first sendable message.
785 * @param peer The destination peer.
787 * @return Best current known path towards the peer, if any.
789 static struct MeshPeerQueue *
790 peer_get_first_message (const struct MeshPeer *peer)
792 struct MeshPeerQueue *q;
794 for (q = peer->queue_head; NULL != q; q = q->next)
796 if (queue_is_sendable (q))
805 * Function to process paths received for a new peer addition. The recorded
806 * paths form the initial tunnel, which can be optimized later.
807 * Called on each result obtained for the DHT search.
813 search_handler (void *cls, const struct MeshPeerPath *path)
815 struct MeshPeer *peer = cls;
816 unsigned int connection_count;
818 GMP_add_path_to_all (path, GNUNET_NO);
820 /* Count connections */
821 connection_count = GMT_count_connections (peer->tunnel);
823 /* If we already have 3 (or more (?!)) connections, it's enough */
824 if (3 <= connection_count)
827 if (MESH_TUNNEL3_SEARCHING == GMT_get_cstate (peer->tunnel))
829 LOG (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
838 * Core callback to write a queued packet to core buffer
840 * @param cls Closure (peer info).
841 * @param size Number of bytes available in buf.
842 * @param buf Where the to write the message.
844 * @return number of bytes written to buf
847 queue_send (void *cls, size_t size, void *buf)
849 struct MeshPeer *peer = cls;
850 struct MeshConnection *c;
851 struct MeshPeerQueue *queue;
852 const struct GNUNET_PeerIdentity *dst_id;
855 peer->core_transmit = NULL;
856 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Queue send towards %s (max %u)\n",
857 GMP_2s (peer), size);
859 if (NULL == buf || 0 == size)
861 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
866 queue = peer_get_first_message (peer);
869 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
874 dst_id = GNUNET_PEER_resolve2 (peer->id);
875 LOG (GNUNET_ERROR_TYPE_DEBUG, "* on connection %s\n", GMC_2s (c));
876 /* Check if buffer size is enough for the message */
877 if (queue->size > size)
879 LOG (GNUNET_ERROR_TYPE_WARNING, "not enough room (%u vs %u), reissue\n",
881 peer->core_transmit =
882 GNUNET_CORE_notify_transmit_ready (core_handle,
883 GNUNET_NO, get_priority (queue),
884 GNUNET_TIME_UNIT_FOREVER_REL,
891 LOG (GNUNET_ERROR_TYPE_DEBUG, "* size %u ok\n", queue->size);
896 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
897 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
898 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
899 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
900 case GNUNET_MESSAGE_TYPE_MESH_KX:
901 case GNUNET_MESSAGE_TYPE_MESH_ACK:
902 case GNUNET_MESSAGE_TYPE_MESH_POLL:
903 LOG (GNUNET_ERROR_TYPE_DEBUG, "* raw: %s\n", GM_m2s (queue->type));
904 data_size = send_core_data_raw (queue->cls, size, buf);
906 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
907 LOG (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
908 if (GMC_is_origin (c, GNUNET_YES))
909 data_size = send_core_connection_create (queue->c, size, buf);
911 data_size = send_core_data_raw (queue->cls, size, buf);
913 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
914 LOG (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
915 if (GMC_is_origin (c, GNUNET_NO) ||
916 GMC_is_origin (c, GNUNET_YES))
917 data_size = send_core_connection_ack (queue->c, size, buf);
919 data_size = send_core_data_raw (queue->cls, size, buf);
921 case GNUNET_MESSAGE_TYPE_MESH_DATA:
922 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
923 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
924 /* This should be encapsulted */
930 LOG (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n", queue->type);
934 if (0 < drop_percent &&
935 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
937 LOG (GNUNET_ERROR_TYPE_WARNING, "DD %s on connection\n",
938 GM_m2s (queue->type), GMC_2s (c));
943 LOG (GNUNET_ERROR_TYPE_INFO,
944 "ss %s on connection %s (%p) %s (size %u)\n",
945 GM_m2s (queue->type), GMC_2s (c), c, GM_f2s (queue->fwd), data_size);
948 /* Free queue, but cls was freed by send_core_* */
949 GMP_queue_destroy (queue, GNUNET_NO);
951 /* If more data in queue, send next */
952 queue = peer_get_first_message (peer);
955 LOG (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
956 if (NULL == peer->core_transmit)
958 peer->core_transmit =
959 GNUNET_CORE_notify_transmit_ready (core_handle,
960 GNUNET_NO, get_priority (queue),
961 GNUNET_TIME_UNIT_FOREVER_REL,
966 queue->start_waiting = GNUNET_TIME_absolute_get ();
970 LOG (GNUNET_ERROR_TYPE_DEBUG,
971 "* tmt rdy called somewhere else\n");
973 // GMC_start_poll (); FIXME needed?
977 // GMC_stop_poll(); FIXME needed?
980 LOG (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
985 /******************************************************************************/
986 /******************************** API ***********************************/
987 /******************************************************************************/
991 * Free a transmission that was already queued with all resources
992 * associated to the request.
994 * @param queue Queue handler to cancel.
995 * @param clear_cls Is it necessary to free associated cls?
998 GMP_queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
1000 struct MeshPeer *peer;
1004 if (GNUNET_YES == clear_cls)
1006 LOG (GNUNET_ERROR_TYPE_DEBUG, "# queue destroy type %s\n",
1007 GM_m2s (queue->type));
1008 switch (queue->type)
1010 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
1011 LOG (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
1013 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
1014 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
1015 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
1016 case GNUNET_MESSAGE_TYPE_MESH_KEEPALIVE:
1017 case GNUNET_MESSAGE_TYPE_MESH_KX:
1018 case GNUNET_MESSAGE_TYPE_MESH_ENCRYPTED:
1019 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1020 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1021 GNUNET_free_non_null (queue->cls);
1026 LOG (GNUNET_ERROR_TYPE_ERROR, "# type %s unknown!\n",
1027 GM_m2s (queue->type));
1030 GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
1032 if (queue->type != GNUNET_MESSAGE_TYPE_MESH_ACK &&
1033 queue->type != GNUNET_MESSAGE_TYPE_MESH_POLL)
1038 if (NULL != queue->callback)
1040 LOG (GNUNET_ERROR_TYPE_DEBUG, "# Calling callback\n");
1041 queue->callback (queue->callback_cls,
1042 queue->c, queue->type,
1043 queue->fwd, queue->size,
1044 GNUNET_TIME_absolute_get_duration (queue->start_waiting));
1047 GNUNET_free (queue);
1052 * @brief Queue and pass message to core when possible.
1054 * @param peer Peer towards which to queue the message.
1055 * @param cls Closure (@c type dependant). It will be used by queue_send to
1056 * build the message to be sent if not already prebuilt.
1057 * @param type Type of the message, 0 for a raw message.
1058 * @param size Size of the message.
1059 * @param c Connection this message belongs to (can be NULL).
1060 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
1061 * @param cont Continuation to be called once CORE has taken the message.
1062 * @param cont_cls Closure for @c cont.
1064 * @return Handle to cancel the message before it is sent. Once cont is called
1065 * message has been sent and therefore the handle is no longer valid.
1067 struct MeshPeerQueue *
1068 GMP_queue_add (struct MeshPeer *peer, void *cls, uint16_t type, size_t size,
1069 struct MeshConnection *c, int fwd,
1070 GMP_sent cont, void *cont_cls)
1072 struct MeshPeerQueue *queue;
1076 LOG (GNUNET_ERROR_TYPE_INFO, "qq %s on connection %s (%p) %s towards %s (size %u)\n",
1077 GM_m2s (type), GMC_2s (c), c, GM_f2s (fwd), GMP_2s(peer), size);
1079 if (NULL == peer->connections)
1081 /* We are not connected to this peer, ignore request. */
1082 LOG (GNUNET_ERROR_TYPE_DEBUG, "WARNING %s not a neighbor\n", GMP_2s (peer));
1083 GNUNET_STATISTICS_update (stats, "# messages dropped due to wrong hop", 1,
1090 if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
1091 GNUNET_MESSAGE_TYPE_MESH_ACK == type)
1096 LOG (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
1098 call_core = NULL == c ? GNUNET_YES : GMC_is_sendable (c, fwd);
1099 queue = GNUNET_new (struct MeshPeerQueue);
1106 queue->callback = cont;
1107 queue->callback_cls = cont_cls;
1110 GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
1115 GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
1116 call_core = GNUNET_YES;
1119 if (NULL == peer->core_transmit && GNUNET_YES == call_core)
1121 LOG (GNUNET_ERROR_TYPE_DEBUG,
1122 "calling core tmt rdy towards %s for %u bytes\n",
1123 GMP_2s (peer), size);
1124 peer->core_transmit =
1125 GNUNET_CORE_notify_transmit_ready (core_handle,
1126 GNUNET_NO, get_priority (queue),
1127 GNUNET_TIME_UNIT_FOREVER_REL,
1128 GNUNET_PEER_resolve2 (peer->id),
1132 queue->start_waiting = GNUNET_TIME_absolute_get ();
1136 LOG (GNUNET_ERROR_TYPE_DEBUG,
1137 "core tmt rdy towards %s already called\n",
1146 * Cancel all queued messages to a peer that belong to a certain connection.
1148 * @param peer Peer towards whom to cancel.
1149 * @param c Connection whose queued messages to cancel. Might be destroyed by
1150 * the sent continuation call.
1153 GMP_queue_cancel (struct MeshPeer *peer, struct MeshConnection *c)
1155 struct MeshPeerQueue *q;
1156 struct MeshPeerQueue *next;
1157 struct MeshPeerQueue *prev;
1159 for (q = peer->queue_head; NULL != q; q = next)
1164 LOG (GNUNET_ERROR_TYPE_DEBUG, "GMP_cancel_queue %s\n", GM_m2s (q->type));
1165 GMP_queue_destroy (q, GNUNET_YES);
1167 /* Get next from prev, q->next might be already freed:
1168 * queue destroy -> callback -> GMC_destroy -> cancel_queues -> here
1171 next = peer->queue_head;
1180 if (NULL == peer->queue_head)
1182 if (NULL != peer->core_transmit)
1184 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit);
1185 peer->core_transmit = NULL;
1192 * Get the first transmittable message for a connection.
1194 * @param peer Neighboring peer.
1195 * @param c Connection.
1197 * @return First transmittable message.
1199 static struct MeshPeerQueue *
1200 connection_get_first_message (struct MeshPeer *peer, struct MeshConnection *c)
1202 struct MeshPeerQueue *q;
1204 for (q = peer->queue_head; NULL != q; q = q->next)
1208 if (queue_is_sendable (q))
1210 LOG (GNUNET_ERROR_TYPE_DEBUG, " sendable!!\n");
1213 LOG (GNUNET_ERROR_TYPE_DEBUG, " not sendable\n");
1221 GMP_queue_unlock (struct MeshPeer *peer, struct MeshConnection *c)
1223 struct MeshPeerQueue *q;
1226 if (NULL != peer->core_transmit)
1228 LOG (GNUNET_ERROR_TYPE_DEBUG, " already unlocked!\n");
1229 return; /* Already unlocked */
1232 q = connection_get_first_message (peer, c);
1235 LOG (GNUNET_ERROR_TYPE_DEBUG, " queue empty!\n");
1236 return; /* Nothing to transmit */
1240 peer->core_transmit =
1241 GNUNET_CORE_notify_transmit_ready (core_handle,
1242 GNUNET_NO, get_priority (q),
1243 GNUNET_TIME_UNIT_FOREVER_REL,
1244 GNUNET_PEER_resolve2 (peer->id),
1252 * Initialize the peer subsystem.
1254 * @param c Configuration.
1257 GMP_init (const struct GNUNET_CONFIGURATION_Handle *c)
1259 LOG (GNUNET_ERROR_TYPE_DEBUG, "init\n");
1260 peers = GNUNET_CONTAINER_multipeermap_create (128, GNUNET_NO);
1262 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
1265 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1266 "MESH", "MAX_PEERS", "USING DEFAULT");
1271 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
1278 LOG (GNUNET_ERROR_TYPE_WARNING,
1279 "\n***************************************\n"
1280 "Mesh is running with drop mode enabled.\n"
1281 "This is NOT a good idea!\n"
1282 "Remove the DROP_PERCENT option from your configuration.\n"
1283 "***************************************\n");
1286 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
1287 NULL, /* Closure passed to MESH functions */
1288 &core_init, /* Call core_init once connected */
1289 &core_connect, /* Handle connects */
1290 &core_disconnect, /* remove peers on disconnects */
1291 NULL, /* Don't notify about all incoming messages */
1292 GNUNET_NO, /* For header only in notification */
1293 NULL, /* Don't notify about all outbound messages */
1294 GNUNET_NO, /* For header-only out notification */
1295 core_handlers); /* Register these handlers */
1296 transport_handle = GNUNET_TRANSPORT_connect (c, &my_full_id,
1298 NULL, NULL, NULL); /* Notify callbacks */
1300 if (NULL == core_handle || NULL == transport_handle)
1303 GNUNET_SCHEDULER_shutdown ();
1310 * Shut down the peer subsystem.
1315 GNUNET_CONTAINER_multipeermap_iterate (peers, &shutdown_tunnel, NULL);
1317 if (core_handle != NULL)
1319 GNUNET_CORE_disconnect (core_handle);
1322 if (transport_handle != NULL)
1324 GNUNET_TRANSPORT_disconnect (transport_handle);
1325 transport_handle = NULL;
1327 GNUNET_PEER_change_rc (myid, -1);
1331 * Retrieve the MeshPeer stucture associated with the peer, create one
1332 * and insert it in the appropriate structures if the peer is not known yet.
1334 * @param peer_id Full identity of the peer.
1336 * @return Existing or newly created peer structure.
1339 GMP_get (const struct GNUNET_PeerIdentity *peer_id)
1341 struct MeshPeer *peer;
1343 peer = GNUNET_CONTAINER_multipeermap_get (peers, peer_id);
1346 peer = GNUNET_new (struct MeshPeer);
1347 if (GNUNET_CONTAINER_multipeermap_size (peers) > max_peers)
1349 peer_delete_oldest ();
1351 GNUNET_CONTAINER_multipeermap_put (peers, peer_id, peer,
1352 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1353 peer->id = GNUNET_PEER_intern (peer_id);
1355 peer->last_contact = GNUNET_TIME_absolute_get();
1362 * Retrieve the MeshPeer stucture associated with the peer, create one
1363 * and insert it in the appropriate structures if the peer is not known yet.
1365 * @param peer Short identity of the peer.
1367 * @return Existing or newly created peer structure.
1370 GMP_get_short (const GNUNET_PEER_Id peer)
1372 return GMP_get (GNUNET_PEER_resolve2 (peer));
1377 * Try to connect to a peer on transport level.
1379 * @param cls Closure (peer).
1380 * @param tc TaskContext.
1383 try_connect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1385 struct MeshPeer *peer = cls;
1387 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1390 GNUNET_TRANSPORT_try_connect (transport_handle,
1391 GNUNET_PEER_resolve2 (peer->id), NULL, NULL);
1396 * Try to establish a new connection to this peer (in its tunnel).
1397 * If the peer doesn't have any path to it yet, try to get one.
1398 * If the peer already has some path, send a CREATE CONNECTION towards it.
1400 * @param peer Peer to connect to.
1403 GMP_connect (struct MeshPeer *peer)
1405 struct MeshTunnel3 *t;
1406 struct MeshPeerPath *p;
1407 struct MeshConnection *c;
1410 LOG (GNUNET_ERROR_TYPE_DEBUG, "peer_connect towards %s\n", GMP_2s (peer));
1412 /* If we have a current hello, try to connect using it. */
1413 GMP_try_connect (peer);
1417 rerun_search = GNUNET_NO;
1419 if (NULL != peer->path_head)
1421 LOG (GNUNET_ERROR_TYPE_DEBUG, " some path exists\n");
1422 p = peer_get_best_path (peer);
1425 LOG (GNUNET_ERROR_TYPE_DEBUG, " %u hops\n", p->length);
1426 c = GMT_use_path (t, p);
1429 /* This case can happen when the path includes a first hop that is
1430 * not yet known to be connected.
1432 * This happens quite often during testing when running mesh
1433 * under valgrind: core connect notifications come very late and the
1434 * DHT result has already come and created a valid path.
1435 * In this case, the peer->connections hashmap will be NULL and
1436 * tunnel_use_path will not be able to create a connection from that
1439 * Re-running the DHT GET should give core time to callback.
1441 * GMT_use_path -> GMC_new -> register_neighbors takes care of
1442 * updating statistics about this issue.
1444 rerun_search = GNUNET_YES;
1448 GMC_send_create (c);
1454 LOG (GNUNET_ERROR_TYPE_DEBUG, " but is NULL, all paths are in use\n");
1458 if (NULL != peer->search_h && GNUNET_YES == rerun_search)
1460 GMD_search_stop (peer->search_h);
1461 peer->search_h = NULL;
1462 LOG (GNUNET_ERROR_TYPE_DEBUG,
1463 " Stopping DHT GET for peer %s\n",
1467 if (NULL == peer->search_h)
1469 const struct GNUNET_PeerIdentity *id;
1471 id = GNUNET_PEER_resolve2 (peer->id);
1472 LOG (GNUNET_ERROR_TYPE_DEBUG,
1473 " Starting DHT GET for peer %s\n", GMP_2s (peer));
1474 peer->search_h = GMD_search (id, &search_handler, peer);
1475 if (MESH_TUNNEL3_NEW == GMT_get_cstate (t))
1476 GMT_change_cstate (t, MESH_TUNNEL3_SEARCHING);
1482 * Chech whether there is a direct (core level) connection to peer.
1484 * @param peer Peer to check.
1486 * @return #GNUNET_YES if there is a direct connection.
1489 GMP_is_neighbor (const struct MeshPeer *peer)
1491 struct MeshPeerPath *path;
1493 if (NULL == peer->connections)
1496 for (path = peer->path_head; NULL != path; path = path->next)
1498 if (3 > path->length)
1502 /* Is not a neighbor but connections is not NULL, probably disconnecting */
1508 * Create and initialize a new tunnel towards a peer, in case it has none.
1509 * In case the peer already has a tunnel, nothing is done.
1511 * Does not generate any traffic, just creates the local data structures.
1513 * @param peer Peer towards which to create the tunnel.
1516 GMP_add_tunnel (struct MeshPeer *peer)
1518 if (NULL != peer->tunnel)
1520 peer->tunnel = GMT_new (peer);
1525 * Add a connection to a neighboring peer.
1527 * Store that the peer is the first hop of the connection in one
1528 * direction and that on peer disconnect the connection must be
1529 * notified and destroyed, for it will no longer be valid.
1531 * @param peer Peer to add connection to.
1532 * @param c Connection to add.
1534 * @return GNUNET_OK on success.
1537 GMP_add_connection (struct MeshPeer *peer,
1538 struct MeshConnection *c)
1541 LOG (GNUNET_ERROR_TYPE_DEBUG, "adding connection %s\n", GMC_2s (c));
1542 LOG (GNUNET_ERROR_TYPE_DEBUG, "to peer %s\n", GMP_2s (peer));
1544 if (NULL == peer->connections)
1547 LOG (GNUNET_ERROR_TYPE_DEBUG,
1548 "Peer %s is not a neighbor!\n",
1550 return GNUNET_SYSERR;
1552 LOG (GNUNET_ERROR_TYPE_DEBUG,
1553 "peer %s ok, has %u connections.\n",
1554 GMP_2s (peer), GNUNET_CONTAINER_multihashmap_size (peer->connections));
1555 result = GNUNET_CONTAINER_multihashmap_put (peer->connections,
1558 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1559 LOG (GNUNET_ERROR_TYPE_DEBUG,
1560 " now has %u connections.\n",
1561 GNUNET_CONTAINER_multihashmap_size (peer->connections));
1562 LOG (GNUNET_ERROR_TYPE_DEBUG, "result %u\n", result);
1569 * Add the path to the peer and update the path used to reach it in case this
1572 * @param peer Destination peer to add the path to.
1573 * @param path New path to add. Last peer must be the peer in arg 1.
1574 * Path will be either used of freed if already known.
1575 * @param trusted Do we trust that this path is real?
1577 * @return path if path was taken, pointer to existing duplicate if exists
1580 struct MeshPeerPath *
1581 GMP_add_path (struct MeshPeer *peer, struct MeshPeerPath *path,
1584 struct MeshPeerPath *aux;
1588 LOG (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1589 path->length, GMP_2s (peer));
1591 if ((NULL == peer) || (NULL == path))
1594 path_destroy (path);
1597 if (path->peers[path->length - 1] != peer->id)
1600 path_destroy (path);
1603 if (2 >= path->length && GNUNET_NO == trusted)
1605 /* Only allow CORE to tell us about direct paths */
1606 path_destroy (path);
1609 for (l = 1; l < path->length; l++)
1611 if (path->peers[l] == myid)
1613 LOG (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1614 for (l2 = 0; l2 < path->length - l; l2++)
1616 path->peers[l2] = path->peers[l + l2];
1620 path->peers = GNUNET_realloc (path->peers,
1621 path->length * sizeof (GNUNET_PEER_Id));
1625 LOG (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u]\n", path->length);
1627 l = path_get_length (path);
1630 path_destroy (path);
1634 GNUNET_assert (peer->id == path->peers[path->length - 1]);
1635 for (aux = peer->path_head; aux != NULL; aux = aux->next)
1637 l2 = path_get_length (aux);
1640 LOG (GNUNET_ERROR_TYPE_DEBUG, " added\n");
1641 GNUNET_CONTAINER_DLL_insert_before (peer->path_head,
1642 peer->path_tail, aux, path);
1647 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1649 LOG (GNUNET_ERROR_TYPE_DEBUG, " already known\n");
1650 path_destroy (path);
1655 GNUNET_CONTAINER_DLL_insert_tail (peer->path_head, peer->path_tail,
1657 LOG (GNUNET_ERROR_TYPE_DEBUG, " added last\n");
1663 * Add the path to the origin peer and update the path used to reach it in case
1664 * this is the shortest.
1665 * The path is given in peer_info -> destination, therefore we turn the path
1666 * upside down first.
1668 * @param peer Peer to add the path to, being the origin of the path.
1669 * @param path New path to add after being inversed.
1670 * Path will be either used or freed.
1671 * @param trusted Do we trust that this path is real?
1673 * @return path if path was taken, pointer to existing duplicate if exists
1676 struct MeshPeerPath *
1677 GMP_add_path_to_origin (struct MeshPeer *peer,
1678 struct MeshPeerPath *path,
1684 return GMP_add_path (peer, path, trusted);
1689 * Adds a path to the info of all the peers in the path
1691 * @param p Path to process.
1692 * @param confirmed Whether we know if the path works or not.
1695 GMP_add_path_to_all (const struct MeshPeerPath *p, int confirmed)
1699 /* TODO: invert and add */
1700 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1701 for (i++; i < p->length; i++)
1703 struct MeshPeer *aux;
1704 struct MeshPeerPath *copy;
1706 aux = GMP_get_short (p->peers[i]);
1707 copy = path_duplicate (p);
1708 copy->length = i + 1;
1709 GMP_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1715 * Remove any path to the peer that has the extact same peers as the one given.
1717 * @param peer Peer to remove the path from.
1718 * @param path Path to remove. Is always destroyed .
1721 GMP_remove_path (struct MeshPeer *peer, struct MeshPeerPath *path)
1723 struct MeshPeerPath *iter;
1724 struct MeshPeerPath *next;
1726 GNUNET_assert (myid == path->peers[0]);
1727 GNUNET_assert (peer->id == path->peers[path->length - 1]);
1729 for (iter = peer->path_head; NULL != iter; iter = next)
1732 if (0 == memcmp (path->peers, iter->peers,
1733 sizeof (GNUNET_PEER_Id) * path->length))
1735 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, iter);
1736 path_destroy (iter);
1741 path_destroy (path);
1746 * Remove a connection from a neighboring peer.
1748 * @param peer Peer to remove connection from.
1749 * @param c Connection to remove.
1751 * @return GNUNET_OK on success.
1754 GMP_remove_connection (struct MeshPeer *peer,
1755 const struct MeshConnection *c)
1757 LOG (GNUNET_ERROR_TYPE_DEBUG, "removing connection %s\n", GMC_2s (c));
1758 LOG (GNUNET_ERROR_TYPE_DEBUG, "from peer %s\n", GMP_2s (peer));
1760 if (NULL == peer || NULL == peer->connections)
1762 LOG (GNUNET_ERROR_TYPE_DEBUG,
1763 "Peer %s is not a neighbor!\n",
1765 return GNUNET_SYSERR;
1767 LOG (GNUNET_ERROR_TYPE_DEBUG,
1768 "peer %s ok, has %u connections.\n",
1769 GMP_2s (peer), GNUNET_CONTAINER_multihashmap_size (peer->connections));
1771 return GNUNET_CONTAINER_multihashmap_remove (peer->connections,
1777 * Start the DHT search for new paths towards the peer: we don't have
1778 * enough good connections.
1780 * @param peer Destination peer.
1783 GMP_start_search (struct MeshPeer *peer)
1785 if (NULL != peer->search_h)
1791 peer->search_h = GMD_search (GMP_get_id (peer), &search_handler, peer);
1796 * Stop the DHT search for new paths towards the peer: we already have
1797 * enough good connections.
1799 * @param peer Destination peer.
1802 GMP_stop_search (struct MeshPeer *peer)
1804 if (NULL == peer->search_h)
1810 GMD_search_stop (peer->search_h);
1811 peer->search_h = NULL;
1816 * Get the Full ID of a peer.
1818 * @param peer Peer to get from.
1820 * @return Full ID of peer.
1822 const struct GNUNET_PeerIdentity *
1823 GMP_get_id (const struct MeshPeer *peer)
1825 return GNUNET_PEER_resolve2 (peer->id);
1830 * Get the Short ID of a peer.
1832 * @param peer Peer to get from.
1834 * @return Short ID of peer.
1837 GMP_get_short_id (const struct MeshPeer *peer)
1850 GMP_set_tunnel (struct MeshPeer *peer, struct MeshTunnel3 *t)
1857 * Get the tunnel towards a peer.
1859 * @param peer Peer to get from.
1861 * @return Tunnel towards peer.
1863 struct MeshTunnel3 *
1864 GMP_get_tunnel (const struct MeshPeer *peer)
1866 return peer->tunnel;
1871 * Set the hello message.
1873 * @param peer Peer whose message to set.
1874 * @param hello Hello message.
1877 GMP_set_hello (struct MeshPeer *peer, const struct GNUNET_HELLO_Message *hello)
1879 struct GNUNET_HELLO_Message *old;
1882 LOG (GNUNET_ERROR_TYPE_DEBUG, "set hello for %s\n", GMP_2s (peer));
1886 old = GMP_get_hello (peer);
1889 size = GNUNET_HELLO_size (hello);
1890 LOG (GNUNET_ERROR_TYPE_DEBUG, " new (%u bytes)\n", size);
1891 peer->hello = GNUNET_malloc (size);
1892 memcpy (peer->hello, hello, size);
1896 peer->hello = GNUNET_HELLO_merge (old, hello);
1897 LOG (GNUNET_ERROR_TYPE_DEBUG, " merge into %p (%u bytes)\n",
1898 peer->hello, GNUNET_HELLO_size (hello));
1905 * Get the hello message.
1907 * @param peer Peer whose message to get.
1909 * @return Hello message.
1911 struct GNUNET_HELLO_Message *
1912 GMP_get_hello (struct MeshPeer *peer)
1914 struct GNUNET_TIME_Absolute expiration;
1915 struct GNUNET_TIME_Relative remaining;
1917 if (NULL == peer->hello)
1920 expiration = GNUNET_HELLO_get_last_expiration (peer->hello);
1921 remaining = GNUNET_TIME_absolute_get_remaining (expiration);
1922 if (0 == remaining.rel_value_us)
1924 LOG (GNUNET_ERROR_TYPE_DEBUG, " get - hello expired on %s\n",
1925 GNUNET_STRINGS_absolute_time_to_string (expiration));
1926 GNUNET_free (peer->hello);
1934 * Try to connect to a peer on TRANSPORT level.
1936 * @param peer Peer to whom to connect.
1939 GMP_try_connect (struct MeshPeer *peer)
1941 struct GNUNET_HELLO_Message *hello;
1942 struct GNUNET_MessageHeader *mh;
1944 hello = GMP_get_hello (peer);
1948 mh = GNUNET_HELLO_get_header (hello);
1949 GNUNET_TRANSPORT_offer_hello (transport_handle, mh, try_connect, peer);
1954 * Count the number of known paths toward the peer.
1956 * @param peer Peer to get path info.
1958 * @return Number of known paths.
1961 GMP_count_paths (const struct MeshPeer *peer)
1963 struct MeshPeerPath *iter;
1966 for (iter = peer->path_head, i = 0; NULL != iter; iter = iter->next)
1974 * Iterate all known peers.
1976 * @param iter Iterator.
1977 * @param cls Closure for @c iter.
1980 GMP_iterate_all (GNUNET_CONTAINER_PeerMapIterator iter, void *cls)
1982 GNUNET_CONTAINER_multipeermap_iterate (peers, iter, cls);
1987 * Get the static string for a peer ID.
1991 * @return Static string for it's ID.
1994 GMP_2s (const struct MeshPeer *peer)
1998 return GNUNET_i2s (GNUNET_PEER_resolve2 (peer->id));