2 This file is part of GNUnet.
3 (C) 2001 - 2011 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.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
29 * - MESH NETWORK HANDLER HELPERS
30 * - MESH NETWORK HANDLES
31 * - MESH LOCAL HANDLER HELPERS
32 * - MESH LOCAL HANDLES
33 * - PERIODIC FUNCTIONS
34 * - MAIN FUNCTIONS (main & run)
37 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
38 * - partial disconnect reporting -- same as error reporting?
39 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
40 * - speed requirement specification (change?) in mesh API -- API call
41 * - add ping message (connection confirmation, others?)
45 #include "gnunet_common.h"
46 #include "gnunet_util_lib.h"
47 #include "gnunet_peer_lib.h"
48 #include "gnunet_core_service.h"
49 #include "gnunet_protocols.h"
52 #include "mesh_protocol.h"
53 #include "gnunet_dht_service.h"
55 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
56 GNUNET_TIME_UNIT_SECONDS,\
60 /******************************************************************************/
61 /************************ DATA STRUCTURES ****************************/
62 /******************************************************************************/
65 * Information regarding a path
73 struct MeshPath *next;
74 struct MeshPath *prev;
77 * Whether the path is serving traffic in a tunnel or is a backup
82 * List of all the peers that form the path from origin to target
84 GNUNET_PEER_Id *peers;
87 * Number of peers (hops) in the path
94 * All the states a peer participating in a tunnel can be in.
99 * Path to the peer not known yet
104 * Request sent, not yet answered.
109 * Peer connected and ready to accept data
114 * Peer connected previosly but not responding
116 MESH_PEER_RECONNECTING
121 * Struct containing all information regarding a given peer
131 * Is the peer reachable? Is the peer even connected?
133 enum MeshPeerState state;
136 * Last time we heard from this peer
138 struct GNUNET_TIME_Absolute last_contact;
141 * Number of attempts to reconnect so far
143 int n_reconnect_attempts;
146 * Paths to reach the peer
148 struct MeshPath *path;
149 struct MeshPath *path_tail;
152 * Handle to stop the DHT search for a path to this peer
154 struct GNUNET_DHT_GetHandle *dhtget;
159 * Data scheduled to transmit (to local client or remote peer)
166 struct MeshQueue *next;
167 struct MeshQueue *prev;
170 * Target of the data (NULL if target is client)
172 struct MeshPeerInfo *peer;
175 * Client to send the data to (NULL if target is peer)
177 struct MeshClient *client;
180 * Size of the message to transmit
185 * How old is the data?
187 struct GNUNET_TIME_Absolute timestamp;
192 struct GNUNET_MessageHeader *data;
196 * Globally unique tunnel identification (owner + number)
197 * DO NOT USE OVER THE NETWORK
199 struct MESH_TunnelID {
201 * Node that owns the tunnel
206 * Tunnel number to differentiate all the tunnels owned by the node oid
207 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_MARK )
209 MESH_TunnelNumber tid;
213 struct MeshClient; /* FWD declaration */
215 * Struct containing all information regarding a tunnel
216 * For an intermediate node the improtant info used will be:
217 * - id Tunnel unique identification
218 * - paths[0] To know where to send it next
219 * - metainfo: ready, speeds, accounting
226 struct MESH_TunnelID id;
229 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_MARK or 0 )
231 MESH_TunnelNumber local_tid;
234 * Last time the tunnel was used
236 struct GNUNET_TIME_Absolute timestamp;
239 * Peers in the tunnelindexed by PeerIdentity (MeshPeerInfo)
241 struct GNUNET_CONTAINER_MultiHashMap* peers;
244 * Number of peers that are connected and potentially ready to receive data
246 unsigned int peers_ready;
249 * Number of peers that have been added to the tunnel
251 unsigned int peers_total;
255 * Client owner of the tunnel, if any
257 struct MeshClient *client;
260 * Messages ready to transmit
262 struct MeshQueue *queue_head;
263 struct MeshQueue *queue_tail;
268 * Struct containing information about a client of the service
275 struct MeshClient *next;
276 struct MeshClient *prev;
279 * Tunnels that belong to this client, indexed by local id
281 struct GNUNET_CONTAINER_MultiHashMap* tunnels;
284 * Handle to communicate with the client
286 struct GNUNET_SERVER_Client *handle;
289 * Applications that this client has claimed to provide
291 GNUNET_MESH_ApplicationType *apps;
292 unsigned int app_counter;
295 * Messages that this client has declared interest in
298 unsigned int type_counter;
302 /******************************************************************************/
303 /*********************** GLOBAL VARIABLES ****************************/
304 /******************************************************************************/
309 static struct MeshClient *clients;
310 static struct MeshClient *clients_tail;
313 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
315 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
318 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
320 struct GNUNET_CONTAINER_MultiHashMap *peers;
323 * Handle to communicate with core
325 static struct GNUNET_CORE_Handle *core_handle;
330 static struct GNUNET_DHT_Handle *dht_handle;
333 * Local peer own ID (memory efficient handle)
335 static GNUNET_PEER_Id myid;
338 * Tunnel ID for the next created tunnel (global tunnel number)
340 static MESH_TunnelNumber next_tid;
342 /******************************************************************************/
343 /****************** GENERAL HELPER FUNCTIONS ************************/
344 /******************************************************************************/
347 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
348 * and inster it in the appropiate structures if the peer is not known yet.
349 * @param peer Identity of the peer
350 * @return Existing or newly created peer info
352 static struct MeshPeerInfo *
353 get_peer_info (const struct GNUNET_PeerIdentity *peer)
355 struct MeshPeerInfo * peer_info;
357 peer_info = GNUNET_CONTAINER_multihashmap_get(peers,
359 if (NULL == peer_info) {
360 peer_info = (struct MeshPeerInfo *)
361 GNUNET_malloc(sizeof(struct MeshPeerInfo));
362 GNUNET_CONTAINER_multihashmap_put(peers,
365 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
366 peer_info->id = GNUNET_PEER_intern(peer);
367 peer_info->state = MESH_PEER_SEARCHING;
374 * Find the first peer whom to send a packet to go down this path
375 * @param path The path to use
376 * @return short id of the next peer, myid in case of local delivery,
377 * or 0 in case of error
379 static GNUNET_PEER_Id
380 get_first_hop (struct MeshPath *path)
384 while (NULL != path) {
385 if (path->in_use) break;
389 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
390 "tried to get the next hop from an invalid path\n");
394 for (i = 0; i < path->length; i++) {
395 if (path->peers[i] == myid) {
396 if (i < path->length - 1) {
397 return path->peers[i+1];
408 * Get the cost of the path.
409 * @param path The path to analyze
410 * @return Number of hops to reach destination, UINT_MAX in case the peer is not
414 get_path_cost(struct MeshPath *path)
418 if (NULL == path) return UINT_MAX;
419 for (i = 0; i < path->length; i++) {
420 if (path->peers[i] == myid) {
421 return path->length - i;
429 * Add the path to the peer and update the path used to reach it in case this
431 * @param peer_info Destination peer to add the path to.
432 * @param path New path to add. Last peer must be the peer in arg 1.
435 add_path_to_peer(struct MeshPeerInfo *peer_info, struct MeshPath *path)
438 unsigned int new_cost;
439 unsigned int best_cost;
440 struct MeshPath *aux;
441 struct MeshPath *best;
443 if (NULL == peer_info || NULL == path) return;
445 new_cost = get_path_cost(path);
446 best_cost = UINT_MAX;
448 for (aux = peer_info->path; aux != NULL; aux = aux->next) {
449 if ((i = get_path_cost(aux)) < best_cost) {
454 if (best_cost < new_cost) {
456 GNUNET_CONTAINER_DLL_insert_tail(peer_info->path,
457 peer_info->path_tail,
460 if (NULL != best) best->in_use = 0;
462 GNUNET_CONTAINER_DLL_insert(peer_info->path,
463 peer_info->path_tail,
471 * Add the path to the peer and update the path used to reach it in case this
472 * is the shortest. The path is given in reverse, the destination peer is
473 * path[0]. The function modifies the path, inverting it to use the origin as
475 * @param peer_info Destination peer to add the path to.
476 * @param path New path to add. First peer must be the peer in arg 1.
479 add_path_to_origin(struct MeshPeerInfo *peer_info, struct MeshPath *path)
484 for (i = 0; i < path->length/2; i++) {
485 aux = path->peers[i];
486 path->peers[i] = path->peers[path->length - i - 1];
487 path->peers[path->length - i - 1] = aux;
489 add_path_to_peer(peer_info, path);
494 * Check if client has registered with the service and has not disconnected
495 * @param client the client to check
496 * @return non-NULL if client exists in the global DLL
498 static struct MeshClient *
499 retrieve_client (struct GNUNET_SERVER_Client *client)
501 struct MeshClient *c;
505 if (c->handle == client) return c;
513 * Search for a tunnel among the tunnels for a client
514 * @param client the client whose tunnels to search in
515 * @param tid the local id of the tunnel
516 * @return tunnel handler, NULL if doesn't exist
518 static struct MeshTunnel *
519 retrieve_tunnel_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
521 GNUNET_HashCode hash;
523 GNUNET_CRYPTO_hash(&tid, sizeof(MESH_TunnelNumber), &hash);
524 return GNUNET_CONTAINER_multihashmap_get(c->tunnels, &hash);
528 * Search for a tunnel by global ID using PEER_ID
529 * @param pi owner of the tunnel
530 * @param tid global tunnel number
531 * @return tunnel handler, NULL if doesn't exist
533 static struct MeshTunnel *
534 retrieve_tunnel_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
536 struct MESH_TunnelID id;
537 GNUNET_HashCode hash;
542 GNUNET_CRYPTO_hash(&id, sizeof(struct MESH_TunnelID), &hash);
543 return GNUNET_CONTAINER_multihashmap_get(tunnels, &hash);
549 * Search for a tunnel by global ID using full PeerIdentities
550 * @param oid owner of the tunnel
551 * @param tid global tunnel number
552 * @return tunnel handler, NULL if doesn't exist
554 static struct MeshTunnel *
555 retrieve_tunnel (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
557 return retrieve_tunnel_by_pi(GNUNET_PEER_search(oid), tid);
562 * Destroy the path and free any allocated resources linked to it
563 * @param t tunnel the path belongs to
564 * @param p the path to destroy
565 * @return GNUNET_OK on success
568 destroy_path(struct MeshPath *p)
570 GNUNET_PEER_decrement_rcs(p->peers, p->length);
571 GNUNET_free(p->peers);
578 * Destroy the peer_info and free any allocated resources linked to it
579 * @param t tunnel the path belongs to
580 * @param pi the peer_info to destroy
581 * @return GNUNET_OK on success
584 destroy_peer_info(struct MeshPeerInfo *pi)
586 GNUNET_HashCode hash;
587 struct GNUNET_PeerIdentity id;
589 GNUNET_PEER_resolve(pi->id, &id);
590 GNUNET_PEER_change_rc(pi->id, -1);
591 GNUNET_CRYPTO_hash(&id, sizeof(struct GNUNET_PeerIdentity), &hash);
593 GNUNET_CONTAINER_multihashmap_remove(peers, &hash, pi);
601 * Destroy the tunnel and free any allocated resources linked to it
602 * @param c client the tunnel belongs to
603 * @param t the tunnel to destroy
604 * @return GNUNET_OK on success
607 destroy_tunnel(struct MeshTunnel *t)
609 struct MeshClient *c;
610 GNUNET_HashCode hash;
613 if (NULL == t) return GNUNET_OK;
617 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
618 if(GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove(tunnels, &hash, t)) {
622 GNUNET_CRYPTO_hash(&t->local_tid, sizeof(MESH_TunnelNumber), &hash);
624 GNUNET_CONTAINER_multihashmap_remove(c->tunnels, &hash, t))
632 /******************************************************************************/
633 /**************** MESH NETWORK HANDLER HELPERS ***********************/
634 /******************************************************************************/
637 * Function called to notify a client about the socket
638 * being ready to queue more data. "buf" will be
639 * NULL and "size" zero if the socket was closed for
640 * writing in the meantime.
643 * @param size number of bytes available in buf
644 * @param buf where the callee should write the message
645 * @return number of bytes written to buf
648 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
650 struct MeshPeerInfo *peer_info = cls;
651 struct GNUNET_MESH_ManipulatePath *msg;
653 struct GNUNET_PeerIdentity *peer_ptr;
654 struct GNUNET_PeerIdentity id;
658 if (0 == size && NULL == buf) {
659 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Retransmitting create path\n");
660 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
661 GNUNET_CORE_notify_transmit_ready(core_handle,
664 GNUNET_TIME_UNIT_FOREVER_REL,
666 sizeof(struct GNUNET_MESH_ManipulatePath)
667 + (peer_info->path->length
668 * sizeof (struct GNUNET_PeerIdentity)),
669 &send_core_create_path_for_peer,
680 if (p == NULL) return 0; // TODO Notify ERROR Path not found
682 size_needed = sizeof(struct GNUNET_MESH_ManipulatePath)
683 + p->length * sizeof(struct GNUNET_PeerIdentity);
684 if (size < size_needed) {
685 // TODO retry? cancel?
689 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
690 msg->header.size = htons(size_needed);
691 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
693 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
694 for (i = 0; i < p->length; i++) {
695 GNUNET_PEER_resolve(p->peers[i], peer_ptr++);
698 peer_info->state = MESH_PEER_WAITING;
705 * There are several options to send a "data to origin" or similar packet.
706 * The core callback function needs to know at least: ID of tunnel and the
707 * data itself, so one parameter (cls) is not enough.
708 * 1. Build the message inside the original funtction, call core_ntfy_trnsmt_rdy
709 * passing the created message as cls
710 * - # memcpy: 2 (function X: to message struct, callback: from cls to buf)
711 * - Very messy, original function becomes huge and ugly
712 * (see "handle_mesh_path_create" for example)
713 * 2. Create a helper function to build the packet, then call
714 * core_ntfy_trnsmt_rdy with message as cls.
715 * - # memcpy: 2 (in helper function data->msg and in callback cls->buf)
716 * 3- Define new container, pass container with pointers
717 * - # memcpy = 1 (in callback, cls->buf)
718 * - Noise: extra containers defined per type of message
720 struct info_for_data_to_origin
722 struct MESH_TunnelID *origin;
728 * Function called to notify a client about the socket
729 * being ready to queue more data. "buf" will be
730 * NULL and "size" zero if the socket was closed for
731 * writing in the meantime.
733 * @param cls closure (data itself)
734 * @param size number of bytes available in buf
735 * @param buf where the callee should write the message
736 * @return number of bytes written to buf
739 send_core_data_to_origin (void *cls, size_t size, void *buf)
741 struct info_for_data_to_origin *info = cls;
742 struct GNUNET_MESH_DataMessageToOrigin *msg = buf;
745 GNUNET_assert(NULL != info);
746 total_size = sizeof(struct GNUNET_MESH_DataMessageToOrigin) + info->size;
747 GNUNET_assert(total_size < (uint16_t) -1); /* FIXME */
749 if (total_size > size) {
750 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
751 "not enough buffer to send data to origin\n");
754 msg->header.size = htons(total_size);
755 msg->header.type = htons(GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
756 GNUNET_PEER_resolve(info->origin->oid, &msg->oid);
757 msg->tid = htonl(info->origin->tid);
758 if (0 != info->size && NULL != info->data) {
759 memcpy(&msg[1], info->data, info->size);
768 * Function called to notify a client about the socket
769 * being ready to queue more data. "buf" will be
770 * NULL and "size" zero if the socket was closed for
771 * writing in the meantime.
773 * @param cls closure (data itself)
774 * @param size number of bytes available in buf
775 * @param buf where the callee should write the message
776 * @return number of bytes written to buf
779 send_core_data_to_peer (void *cls, size_t size, void *buf)
781 struct info_for_data_to_origin *info = cls;
782 struct GNUNET_MESH_DataMessageToOrigin *msg = buf;
785 GNUNET_assert(NULL != info);
786 total_size = sizeof(struct GNUNET_MESH_DataMessageToOrigin) + info->size;
787 /* FIXME better constant? short >= 16 bits, not == 16 bits... */
788 GNUNET_assert(total_size < USHRT_MAX);
790 if (total_size > size) {
791 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
792 "not enough buffer to send data to origin\n");
795 msg->header.size = htons(total_size);
796 msg->header.type = htons(GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
797 GNUNET_PEER_resolve(info->origin->oid, &msg->oid);
798 msg->tid = htonl(info->origin->tid);
799 if (0 != info->size && NULL != info->data) {
800 memcpy(&msg[1], info->data, info->size);
808 * Send another peer a notification to destroy a tunnel
809 * @param cls The tunnel to destroy
810 * @param size Size in the buffer
811 * @param buf Memory where to put the data to transmit
812 * @return Size of data put in buffer
815 send_p2p_tunnel_destroy(void *cls, size_t size, void *buf)
817 struct MeshTunnel *t = cls;
818 struct MeshClient *c;
819 struct GNUNET_MESH_TunnelMessage *msg;
823 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY); /*FIXME*/
824 msg->header.size = htons(sizeof(struct GNUNET_MESH_TunnelMessage));
825 msg->tunnel_id = htonl(t->id.tid);
827 destroy_tunnel(c, t);
828 return sizeof(struct GNUNET_MESH_TunnelMessage);
833 /******************************************************************************/
834 /******************** MESH NETWORK HANDLERS **************************/
835 /******************************************************************************/
839 * Core handler for path creation
840 * struct GNUNET_CORE_MessageHandler
843 * @param message message
844 * @param peer peer identity this notification is about
845 * @param atsi performance data
846 * @return GNUNET_OK to keep the connection open,
847 * GNUNET_SYSERR to close it (signal serious error)
851 handle_mesh_path_create (void *cls,
852 const struct GNUNET_PeerIdentity *peer,
853 const struct GNUNET_MessageHeader *message,
854 const struct GNUNET_TRANSPORT_ATS_Information
857 unsigned int own_pos;
860 MESH_TunnelNumber tid;
861 struct GNUNET_MESH_ManipulatePath *msg;
862 struct GNUNET_PeerIdentity *pi;
863 struct GNUNET_PeerIdentity id;
864 GNUNET_HashCode hash;
865 struct MeshPath *path;
866 struct MeshPeerInfo *dest_peer_info;
867 struct MeshPeerInfo *orig_peer_info;
868 struct MeshTunnel *t;
871 size = ntohs(message->size);
872 if (size < sizeof(struct GNUNET_MESH_ManipulatePath)) {
873 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
874 "received create path message too short\n");
878 size -= sizeof(struct GNUNET_MESH_ManipulatePath);
879 if (size < 2 * sizeof(struct GNUNET_PeerIdentity)) {
880 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
881 "create path message lacks enough peers\n");
884 if (size % sizeof(struct GNUNET_PeerIdentity)) {
885 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
886 "create path message of wrong size\n");
889 msg = (struct GNUNET_MESH_ManipulatePath *) message;
890 size /= sizeof(struct GNUNET_PeerIdentity);
892 tid = ntohl(msg->tid);
893 pi = (struct GNUNET_PeerIdentity *) &msg[1];
894 t = retrieve_tunnel(pi, tid);
897 t = GNUNET_malloc(sizeof(struct MeshTunnel));
898 t->id.oid = GNUNET_PEER_intern(pi);
902 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
904 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
906 GNUNET_CONTAINER_multihashmap_put(tunnels,
909 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
911 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
912 "create path: could not store tunnel in hashmap\n");
917 dest_peer_info = GNUNET_CONTAINER_multihashmap_get(peers,
918 &pi[size - 1].hashPubKey);
919 if (NULL == dest_peer_info) {
920 dest_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
921 dest_peer_info->id = GNUNET_PEER_intern(&pi[size - 1]);
922 dest_peer_info->state = MESH_PEER_WAITING;
923 GNUNET_CONTAINER_multihashmap_put(peers,
924 &pi[size - 1].hashPubKey,
926 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
928 orig_peer_info = GNUNET_CONTAINER_multihashmap_get(peers, &pi->hashPubKey);
929 if (NULL == orig_peer_info) {
930 orig_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
931 orig_peer_info->id = GNUNET_PEER_intern(pi);
932 orig_peer_info->state = MESH_PEER_WAITING;
933 GNUNET_CONTAINER_multihashmap_put(peers,
936 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
940 path = GNUNET_malloc(sizeof(struct MeshPath));
942 path->peers = GNUNET_malloc(size * sizeof(GNUNET_PEER_Id));
944 for (i = 0; i < size; i++) {
945 path->peers[i] = GNUNET_PEER_intern(&pi[i]);
946 if (path->peers[i] == myid) own_pos = i;
948 if (own_pos == 0) { /* cannot be self, must be 'not found' */
949 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
950 "create path: self not found in path through self\n");
952 /* FIXME error. destroy tunnel? leave for timeout? */
955 if (own_pos == size - 1) { /* it is for us! */
956 add_path_to_origin(orig_peer_info, path); /* inverts path! */
957 GNUNET_PEER_resolve(get_first_hop(path), &id); /* path is inverted :) */
959 * is it allowed/desired to declare variables this way?
960 * (style, best bractices, etc)
961 * This variable is short lived and completely irrelevant for the rest
964 struct info_for_data_to_origin *info =
965 GNUNET_malloc(sizeof(struct info_for_data_to_origin));
966 info->origin = &t->id;
969 GNUNET_CORE_notify_transmit_ready(core_handle,
972 GNUNET_TIME_UNIT_FOREVER_REL,
974 sizeof(struct GNUNET_MessageHeader),
975 &send_core_data_to_origin,
978 add_path_to_peer(dest_peer_info, path);
979 GNUNET_PEER_resolve(get_first_hop(path), &id);
980 GNUNET_CORE_notify_transmit_ready(core_handle,
983 GNUNET_TIME_UNIT_FOREVER_REL,
985 sizeof(struct GNUNET_MessageHeader),
986 &send_core_create_path_for_peer,
994 * Core handler for mesh network traffic going from the origin to a peer
997 * @param message message
998 * @param peer peer identity this notification is about
999 * @param atsi performance data
1000 * @return GNUNET_OK to keep the connection open,
1001 * GNUNET_SYSERR to close it (signal serious error)
1004 handle_mesh_data_unicast (void *cls,
1005 const struct GNUNET_PeerIdentity *peer,
1006 const struct GNUNET_MessageHeader *message,
1007 const struct GNUNET_TRANSPORT_ATS_Information
1010 // struct GNUNET_MESH_DataMessageFromOrigin *msg = message;
1012 if (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN == ntohs(message->type)) {
1013 /* Retransmit to next in path of tunnel identified by message */
1016 } else { /* GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN */
1017 /* Retransmit to previous in path of tunnel identified by message */
1024 * Core handler for mesh network traffic going from the origin to all peers
1026 * @param cls closure
1027 * @param message message
1028 * @param peer peer identity this notification is about
1029 * @param atsi performance data
1030 * @return GNUNET_OK to keep the connection open,
1031 * GNUNET_SYSERR to close it (signal serious error)
1034 handle_mesh_data_multicast (void *cls,
1035 const struct GNUNET_PeerIdentity *peer,
1036 const struct GNUNET_MessageHeader *message,
1037 const struct GNUNET_TRANSPORT_ATS_Information
1040 // struct GNUNET_MESH_DataMessageMulticast *msg = message;
1042 if (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN == ntohs(message->type)) {
1043 /* Retransmit to next in path of tunnel identified by message */
1046 } else { /* GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN */
1047 /* Retransmit to previous in path of tunnel identified by message */
1054 * Core handler for mesh network traffic
1056 * @param cls closure
1057 * @param message message
1058 * @param peer peer identity this notification is about
1059 * @param atsi performance data
1060 * @return GNUNET_OK to keep the connection open,
1061 * GNUNET_SYSERR to close it (signal serious error)
1064 handle_mesh_data_to_orig (void *cls,
1065 const struct GNUNET_PeerIdentity *peer,
1066 const struct GNUNET_MessageHeader *message,
1067 const struct GNUNET_TRANSPORT_ATS_Information
1070 // struct GNUNET_MESH_DataMessageToOrigin *msg = message;
1072 if (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN == ntohs(message->type)) {
1073 /* Retransmit to next in path of tunnel identified by message */
1076 } else { /* GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN */
1077 /* Retransmit to previous in path of tunnel identified by message */
1084 * Functions to handle messages from core
1086 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1087 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1088 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN, 0},
1089 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_DATA_MULTICAST, 0},
1090 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN, 0},
1096 /******************************************************************************/
1097 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1098 /******************************************************************************/
1101 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1102 * client when the client disconnects.
1103 * @param cls closure (client that is disconnecting)
1104 * @param key the hash of the local tunnel id (used to access the hashmap)
1105 * @param value the value stored at the key (tunnel to destroy)
1106 * @return GNUNET_OK on success
1109 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value) {
1111 r = destroy_tunnel((struct MeshTunnel *) value);
1117 * notify_client_connection_failure: notify a client that the connection to the
1118 * requested remote peer is not possible (for instance, no route found)
1119 * Function called when the socket is ready to queue more data. "buf" will be
1120 * NULL and "size" zero if the socket was closed for writing in the meantime.
1122 * @param cls closure
1123 * @param size number of bytes available in buf
1124 * @param buf where the callee should write the message
1125 * @return number of bytes written to buf
1128 notify_client_connection_failure (void *cls, size_t size, void *buf)
1131 struct MeshPeerInfo *peer_info;
1132 struct GNUNET_MESH_PeerControl *msg;
1133 struct GNUNET_PeerIdentity id;
1135 if (0 == size && NULL == buf) {
1136 // TODO retry? cancel?
1140 size_needed = sizeof(struct GNUNET_MESH_PeerControl);
1141 peer_info = (struct MeshPeerInfo *) cls;
1142 msg = (struct GNUNET_MESH_PeerControl *) buf;
1143 msg->header.size = htons(sizeof(struct GNUNET_MESH_PeerControl));
1144 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1145 // msg->tunnel_id = htonl(peer_info->t->tid);
1146 GNUNET_PEER_resolve(peer_info->id, &id);
1147 memcpy(&msg->peer, &id, sizeof(struct GNUNET_PeerIdentity));
1155 * Send keepalive packets for a peer
1161 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1163 struct MeshPeerInfo *peer_info = cls;
1164 struct GNUNET_PeerIdentity id;
1166 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) return;
1167 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
1168 GNUNET_CORE_notify_transmit_ready(core_handle,
1171 GNUNET_TIME_UNIT_FOREVER_REL,
1173 sizeof(struct GNUNET_MESH_ManipulatePath)
1174 + (peer_info->path->length
1175 * sizeof (struct GNUNET_PeerIdentity)),
1176 &send_core_create_path_for_peer,
1184 * Function to process paths received for a new peer addition. The recorded
1185 * paths form the initial tunnel, which can be optimized later.
1186 * Called on each result obtained for the DHT search.
1188 * @param cls closure
1189 * @param exp when will this value expire
1190 * @param key key of the result
1191 * @param get_path NULL-terminated array of pointers
1192 * to the peers on reverse GET path (or NULL if not recorded)
1193 * @param put_path NULL-terminated array of pointers
1194 * to the peers on the PUT path (or NULL if not recorded)
1195 * @param type type of the result
1196 * @param size number of bytes in data
1197 * @param data pointer to the result data
1200 dht_get_response_handler(void *cls,
1201 struct GNUNET_TIME_Absolute exp,
1202 const GNUNET_HashCode * key,
1203 const struct GNUNET_PeerIdentity * const *get_path,
1204 const struct GNUNET_PeerIdentity * const *put_path,
1205 enum GNUNET_BLOCK_Type type,
1209 struct MeshPeerInfo *peer_info = cls;
1211 struct GNUNET_PeerIdentity pi;
1214 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path) {
1215 // Find ourselves some alternate initial path to the destination: retry
1216 GNUNET_DHT_get_stop(peer_info->dhtget);
1217 GNUNET_PEER_resolve(peer_info->id, &pi);
1218 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1219 GNUNET_TIME_UNIT_FOREVER_REL,
1220 GNUNET_BLOCK_TYPE_ANY,
1222 4, /* replication level */
1223 GNUNET_DHT_RO_RECORD_ROUTE,
1224 NULL, /* bloom filter */
1227 0, /* xquery bits */
1228 dht_get_response_handler,
1232 p = GNUNET_malloc(sizeof(struct MeshPath));
1233 for (i = 0; get_path[i] != NULL; i++);
1234 for (i--; i >= 0; i--) {
1235 p->peers = GNUNET_realloc(p->peers,
1236 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1237 p->peers[p->length] = GNUNET_PEER_intern(get_path[i]);
1240 for (i = 0; put_path[i] != NULL; i++);
1241 for (i--; i >= 0; i--) {
1242 p->peers = GNUNET_realloc(p->peers,
1243 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1244 p->peers[p->length] = GNUNET_PEER_intern(put_path[i]);
1247 add_path_to_peer(peer_info, p);
1248 GNUNET_CORE_notify_transmit_ready(core_handle,
1251 GNUNET_TIME_UNIT_FOREVER_REL,
1253 sizeof(struct GNUNET_MESH_ManipulatePath)
1255 * sizeof (struct GNUNET_PeerIdentity)),
1256 &send_core_create_path_for_peer,
1258 GNUNET_SCHEDULER_add_delayed(REFRESH_PATH_TIME, &path_refresh, peer_info);
1263 /******************************************************************************/
1264 /********************* MESH LOCAL HANDLES **************************/
1265 /******************************************************************************/
1269 * Handler for client disconnection
1271 * @param cls closure
1272 * @param client identification of the client; NULL
1273 * for the last call when the server is destroyed
1276 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
1278 struct MeshClient *c;
1279 struct MeshClient *next;
1281 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1282 "client disconnected\n");
1285 if (c->handle == client) {
1286 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1287 " matching client found, cleaning\n");
1288 GNUNET_CONTAINER_multihashmap_iterate(c->tunnels,
1289 &delete_tunnel_entry,
1291 GNUNET_CONTAINER_multihashmap_destroy(c->tunnels);
1292 if(0 != c->app_counter) GNUNET_free (c->apps);
1293 if(0 != c->type_counter) GNUNET_free (c->types);
1294 GNUNET_CONTAINER_DLL_remove(clients, clients_tail, c);
1299 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1300 " ... searching\n");
1304 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1311 * Handler for new clients
1313 * @param cls closure
1314 * @param client identification of the client
1315 * @param message the actual message, which includes messages the client wants
1318 handle_local_new_client (void *cls,
1319 struct GNUNET_SERVER_Client *client,
1320 const struct GNUNET_MessageHeader *message)
1322 struct GNUNET_MESH_ClientConnect *cc_msg;
1323 struct MeshClient *c;
1328 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
1329 /* Check data sanity */
1330 size = ntohs(message->size) - sizeof(struct GNUNET_MESH_ClientConnect);
1331 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
1332 types = ntohs(cc_msg->types);
1333 apps = ntohs(cc_msg->applications);
1335 types * sizeof(uint16_t) + apps * sizeof(GNUNET_MESH_ApplicationType))
1338 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1342 /* Create new client structure */
1343 c = GNUNET_malloc(sizeof(struct MeshClient));
1346 c->type_counter = types;
1347 c->types = GNUNET_malloc(types * sizeof(uint16_t));
1348 memcpy(c->types, &message[1], types * sizeof(uint16_t));
1351 c->app_counter = apps;
1352 c->apps = GNUNET_malloc(apps * sizeof(GNUNET_MESH_ApplicationType));
1354 &message[1] + types * sizeof(uint16_t),
1355 apps * sizeof(GNUNET_MESH_ApplicationType));
1357 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1358 " client has %u+%u subscriptions\n",
1362 GNUNET_CONTAINER_DLL_insert(clients, clients_tail, c);
1363 c->tunnels = GNUNET_CONTAINER_multihashmap_create(32);
1365 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1371 * Handler for requests of new tunnels
1373 * @param cls closure
1374 * @param client identification of the client
1375 * @param message the actual message
1378 handle_local_tunnel_create (void *cls,
1379 struct GNUNET_SERVER_Client *client,
1380 const struct GNUNET_MessageHeader *message)
1382 struct GNUNET_MESH_TunnelMessage *t_msg;
1383 struct MeshTunnel *t;
1384 struct MeshClient *c;
1385 GNUNET_HashCode hash;
1387 /* Sanity check for client registration */
1388 if (NULL == (c = retrieve_client(client))) {
1390 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1394 /* Message sanity check */
1395 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1397 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1401 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1402 /* Sanity check for tunnel numbering */
1403 if (0 == (ntohl(t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_MARK)) {
1405 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1408 /* Sanity check for duplicate tunnel IDs */
1409 if(NULL != retrieve_tunnel_by_local_id(c, ntohl(t_msg->tunnel_id))) {
1411 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1415 t = GNUNET_malloc(sizeof(struct MeshTunnel));
1416 while (NULL != retrieve_tunnel_by_pi(myid, next_tid))
1417 next_tid = (next_tid + 1) % GNUNET_MESH_LOCAL_TUNNEL_ID_MARK;
1418 t->id.tid = next_tid++;
1420 t->local_tid = ntohl(t_msg->tunnel_id);
1422 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
1424 GNUNET_CRYPTO_hash(&t->local_tid, sizeof(MESH_TunnelNumber), &hash);
1426 GNUNET_CONTAINER_multihashmap_put(c->tunnels, &hash, t,
1427 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1430 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1434 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1436 GNUNET_CONTAINER_multihashmap_put(tunnels, &hash, t,
1437 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1440 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1444 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1450 * Handler for requests of deleting tunnels
1452 * @param cls closure
1453 * @param client identification of the client
1454 * @param message the actual message
1457 handle_local_tunnel_destroy (void *cls,
1458 struct GNUNET_SERVER_Client *client,
1459 const struct GNUNET_MessageHeader *message)
1461 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
1462 struct MeshClient *c;
1463 struct MeshTunnel *t;
1464 MESH_TunnelNumber tid;
1465 GNUNET_HashCode hash;
1468 /* Sanity check for client registration */
1469 if (NULL == (c = retrieve_client(client))) {
1471 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1474 /* Message sanity check */
1475 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1477 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1481 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1483 /* Retrieve tunnel */
1484 tid = ntohl(tunnel_msg->tunnel_id);
1486 /* Remove from local id hashmap */
1487 GNUNET_CRYPTO_hash(&tid, sizeof(MESH_TunnelNumber), &hash);
1488 t = GNUNET_CONTAINER_multihashmap_get(c->tunnels, &hash);
1489 GNUNET_CONTAINER_multihashmap_remove(c->tunnels, &hash, t);
1491 /* Remove from global id hashmap */
1492 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1493 GNUNET_CONTAINER_multihashmap_remove(tunnels, &hash, t);
1495 // notify_tunnel_destroy(t);
1496 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1502 * Handler for connection requests to new peers
1504 * @param cls closure
1505 * @param client identification of the client
1506 * @param message the actual message (PeerControl)
1509 handle_local_connect_add (void *cls,
1510 struct GNUNET_SERVER_Client *client,
1511 const struct GNUNET_MessageHeader *message)
1513 struct GNUNET_MESH_PeerControl *peer_msg;
1514 struct MeshClient *c;
1515 struct MeshTunnel *t;
1516 MESH_TunnelNumber tid;
1517 struct MeshPeerInfo *peer_info;
1520 /* Sanity check for client registration */
1521 if (NULL == (c = retrieve_client(client))) {
1523 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1527 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1528 /* Sanity check for message size */
1529 if (sizeof(struct GNUNET_MESH_PeerControl)
1530 != ntohs(peer_msg->header.size))
1533 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1537 /* Tunnel exists? */
1538 tid = ntohl(peer_msg->tunnel_id);
1539 t = retrieve_tunnel_by_local_id(c, tid);
1542 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1546 /* Does client own tunnel? */
1547 if (t->client->handle != client) {
1549 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1554 peer_info = get_peer_info(&peer_msg->peer);
1556 /* Start DHT search if needed */
1557 if(MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget) {
1558 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1559 GNUNET_TIME_UNIT_FOREVER_REL,
1560 GNUNET_BLOCK_TYPE_ANY,
1561 &peer_msg->peer.hashPubKey,
1562 4, /* replication level */
1563 GNUNET_DHT_RO_RECORD_ROUTE,
1564 NULL, /* bloom filter */
1567 0, /* xquery bits */
1568 dht_get_response_handler,
1572 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1578 * Handler for disconnection requests of peers in a tunnel
1580 * @param cls closure
1581 * @param client identification of the client
1582 * @param message the actual message (PeerControl)
1585 handle_local_connect_del (void *cls,
1586 struct GNUNET_SERVER_Client *client,
1587 const struct GNUNET_MessageHeader *message)
1589 struct GNUNET_MESH_PeerControl *peer_msg;
1590 struct MeshClient *c;
1591 struct MeshTunnel *t;
1592 MESH_TunnelNumber tid;
1594 /* Sanity check for client registration */
1595 if (NULL == (c = retrieve_client(client))) {
1597 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1600 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1601 /* Sanity check for message size */
1602 if (sizeof(struct GNUNET_MESH_PeerControl)
1603 != ntohs(peer_msg->header.size))
1606 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1610 /* Tunnel exists? */
1611 tid = ntohl(peer_msg->tunnel_id);
1612 t = retrieve_tunnel_by_local_id(c, tid);
1615 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1619 /* Does client own tunnel? */
1620 if (t->client->handle != client) {
1622 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1626 /* Ok, delete peer from tunnel */
1627 GNUNET_CONTAINER_multihashmap_remove_all(t->peers,
1628 &peer_msg->peer.hashPubKey);
1630 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1636 * Handler for connection requests to new peers by type
1638 * @param cls closure
1639 * @param client identification of the client
1640 * @param message the actual message (ConnectPeerByType)
1643 handle_local_connect_by_type (void *cls,
1644 struct GNUNET_SERVER_Client *client,
1645 const struct GNUNET_MessageHeader *message)
1647 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
1648 MESH_TunnelNumber tid;
1649 GNUNET_MESH_ApplicationType application;
1650 struct MeshClient *c;
1651 struct MeshTunnel *t;
1653 /* Sanity check for client registration */
1654 if (NULL == (c = retrieve_client(client))) {
1656 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1660 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *)message;
1661 /* Sanity check for message size */
1662 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1663 ntohs(connect_msg->header.size))
1666 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1670 /* Tunnel exists? */
1671 tid = ntohl(connect_msg->tunnel_id);
1672 t = retrieve_tunnel_by_local_id(c, tid);
1675 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1679 /* Does client own tunnel? */
1680 if (t->client->handle != client) {
1682 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1686 /* Ok, lets find a peer offering the service */
1687 application = ntohl(connect_msg->type);
1688 application++; // FIXME silence warnings
1690 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1696 * Handler for client traffic directed to one peer
1698 * @param cls closure
1699 * @param client identification of the client
1700 * @param message the actual message
1703 handle_local_network_traffic (void *cls,
1704 struct GNUNET_SERVER_Client *client,
1705 const struct GNUNET_MessageHeader *message)
1707 struct MeshClient *c;
1708 struct MeshTunnel *t;
1709 struct MeshPeerInfo *pi;
1710 struct GNUNET_MESH_Data *data_msg;
1711 struct GNUNET_PeerIdentity next_hop;
1712 MESH_TunnelNumber tid;
1714 /* Sanity check for client registration */
1715 if (NULL == (c = retrieve_client(client))) {
1717 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1720 data_msg = (struct GNUNET_MESH_Data *)message;
1721 /* Sanity check for message size */
1722 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1723 ntohs(data_msg->header.size))
1726 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1730 /* Tunnel exists? */
1731 tid = ntohl(data_msg->tunnel_id);
1732 t = retrieve_tunnel_by_local_id(c, tid);
1735 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1739 /* Is it a local tunnel? Then, does client own the tunnel? */
1740 if (t->client->handle != NULL && t->client->handle != client) {
1742 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1746 pi = GNUNET_CONTAINER_multihashmap_get(t->peers,
1747 &data_msg->peer_id.hashPubKey);
1748 /* Is the selected peer in the tunnel? */
1751 * Are we SO nice that we automatically try to add him to the tunnel?
1754 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1757 GNUNET_PEER_resolve(get_first_hop(pi->path), &next_hop);
1758 GNUNET_CORE_notify_transmit_ready(core_handle,
1761 GNUNET_TIME_UNIT_FOREVER_REL,
1763 /* FIXME re-check types */
1764 message->size - sizeof(struct GNUNET_MESH_Data)
1765 + sizeof(struct GNUNET_MESH_DataMessageFromOrigin),
1766 &send_core_data_to_origin, /* FIXME re-check */
1769 GNUNET_SERVER_receive_done(client, GNUNET_OK); /* FIXME not yet */
1774 * Handler for client traffic directed to all peers in a tunnel
1776 * @param cls closure
1777 * @param client identification of the client
1778 * @param message the actual message
1781 handle_local_network_traffic_bcast (void *cls,
1782 struct GNUNET_SERVER_Client *client,
1783 const struct GNUNET_MessageHeader *message)
1785 struct MeshClient *c;
1786 struct MeshTunnel *t;
1787 struct GNUNET_MESH_DataBroadcast *data_msg;
1788 MESH_TunnelNumber tid;
1790 /* Sanity check for client registration */
1791 if (NULL == (c = retrieve_client(client))) {
1793 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1796 data_msg = (struct GNUNET_MESH_DataBroadcast *)message;
1797 /* Sanity check for message size */
1798 if (sizeof(struct GNUNET_MESH_PeerControl)
1799 != ntohs(data_msg->header.size))
1802 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1806 /* Tunnel exists? */
1807 tid = ntohl(data_msg->tunnel_id);
1808 t = retrieve_tunnel_by_local_id(c, tid);
1811 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1815 /* Does client own tunnel? */
1816 if (t->client->handle != client) {
1818 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1824 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1829 * Functions to handle messages from clients
1831 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1832 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
1833 {&handle_local_tunnel_create, NULL,
1834 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
1835 sizeof(struct GNUNET_MESH_TunnelMessage)},
1836 {&handle_local_tunnel_destroy, NULL,
1837 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
1838 sizeof(struct GNUNET_MESH_TunnelMessage)},
1839 {&handle_local_connect_add, NULL,
1840 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD,
1841 sizeof(struct GNUNET_MESH_PeerControl)},
1842 {&handle_local_connect_del, NULL,
1843 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL,
1844 sizeof(struct GNUNET_MESH_PeerControl)},
1845 {&handle_local_connect_by_type, NULL,
1846 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE,
1847 sizeof(struct GNUNET_MESH_ConnectPeerByType)},
1848 {&handle_local_network_traffic, NULL,
1849 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
1850 {&handle_local_network_traffic_bcast, NULL,
1851 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0},
1857 * To be called on core init/fail.
1859 * @param cls service closure
1860 * @param server handle to the server for this service
1861 * @param identity the public identity of this peer
1862 * @param publicKey the public key of this peer
1865 core_init (void *cls,
1866 struct GNUNET_CORE_Handle *server,
1867 const struct GNUNET_PeerIdentity *identity,
1868 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
1870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1872 core_handle = server;
1873 myid = GNUNET_PEER_intern(identity);
1878 * Method called whenever a given peer connects.
1880 * @param cls closure
1881 * @param peer peer identity this notification is about
1882 * @param atsi performance data for the connection
1885 core_connect (void *cls,
1886 const struct GNUNET_PeerIdentity *peer,
1887 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1889 // GNUNET_PEER_Id pid;
1890 struct MeshPeerInfo *peer_info;
1891 struct MeshPath *path;
1893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1894 "Peer connected\n");
1895 peer_info = get_peer_info(peer);
1896 if (myid == peer_info->id) {
1897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1900 path = GNUNET_malloc(sizeof(struct MeshPath));
1902 path->peers = GNUNET_malloc(sizeof(GNUNET_PEER_Id) * 2);
1903 path->peers[0] = myid;
1904 path->peers[1] = peer_info->id;
1905 add_path_to_peer(peer_info, path);
1910 * Method called whenever a peer disconnects.
1912 * @param cls closure
1913 * @param peer peer identity this notification is about
1916 core_disconnect (void *cls,
1918 GNUNET_PeerIdentity *peer)
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1922 "Peer disconnected\n");
1923 pid = GNUNET_PEER_search(peer);
1925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1932 /******************************************************************************/
1933 /************************ MAIN FUNCTIONS ****************************/
1934 /******************************************************************************/
1937 * Task run during shutdown.
1943 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1947 if (core_handle != NULL) {
1948 GNUNET_CORE_disconnect (core_handle);
1951 if (dht_handle != NULL) {
1952 GNUNET_DHT_disconnect (dht_handle);
1955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1960 * Process mesh requests.
1962 * @param cls closure
1963 * @param server the initialized server
1964 * @param c configuration to use
1968 struct GNUNET_SERVER_Handle *server,
1969 const struct GNUNET_CONFIGURATION_Handle *c)
1971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1972 "starting to run\n");
1973 GNUNET_SERVER_add_handlers (server, plugin_handlers);
1974 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
1975 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
1977 NULL, /* Closure passed to MESH functions */
1978 &core_init, /* Call core_init once connected */
1979 &core_connect, /* Handle connects */
1980 &core_disconnect, /* remove peers on disconnects */
1981 NULL, /* Do we care about "status" updates? */
1982 NULL, /* Don't notify about all incoming messages */
1983 GNUNET_NO, /* For header only in notification */
1984 NULL, /* Don't notify about all outbound messages */
1985 GNUNET_NO, /* For header-only out notification */
1986 core_handlers); /* Register these handlers */
1987 if (core_handle == NULL) {
1990 dht_handle = GNUNET_DHT_connect(c, 64);
1991 if (dht_handle == NULL) {
1996 tunnels = GNUNET_CONTAINER_multihashmap_create(32);
1997 peers = GNUNET_CONTAINER_multihashmap_create(32);
1999 clients_tail = NULL;
2001 /* Scheduled the task to clean up when shutdown is called */
2002 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2003 &shutdown_task, NULL);
2005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2010 * The main function for the mesh service.
2012 * @param argc number of arguments from the command line
2013 * @param argv command line arguments
2014 * @return 0 ok, 1 on error
2017 main (int argc, char *const *argv)
2022 GNUNET_SERVICE_run (argc,
2025 GNUNET_SERVICE_OPTION_NONE,
2026 &run, NULL)) ? 0 : 1;
2027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,