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3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
29 * - MESH NETWORK HANDLES
30 * - MESH LOCAL HANDLES
31 * - MAIN FUNCTIONS (main & run)
34 * - soft stateing (keep-alive (CHANGE?) / timeout / disconnect) -- not a message issue
35 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
36 * - partial disconnect reporting -- same as error reporting?
37 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
38 * - speed requirement specification (change?) in mesh API -- API call
42 #include "gnunet_common.h"
43 #include "gnunet_util_lib.h"
44 #include "gnunet_peer_lib.h"
45 #include "gnunet_core_service.h"
46 #include "gnunet_protocols.h"
49 #include "mesh_protocol.h"
50 #include "gnunet_dht_service.h"
53 /******************************************************************************/
54 /************************ DATA STRUCTURES ****************************/
55 /******************************************************************************/
58 * All the states a peer participating in a tunnel can be in.
63 * Path to the peer not known yet
68 * Request sent, not yet answered.
73 * Peer connected and ready to accept data
78 * Peer connected previosly but not responding
80 MESH_PEER_RECONNECTING
84 * Struct containing all information regarding a given peer
91 struct PeerInfo *next;
92 struct PeerInfo *prev;
100 * Tunnel this peer belongs to
102 struct MESH_tunnel *t;
105 * Is the peer reachable? Is the peer even connected?
107 enum PeerState state;
110 * When to try to establish contact again?
112 struct GNUNET_TIME_Absolute next_reconnect_attempt;
115 * Who to send the data to --- FIXME what about multiple (alternate) paths?
117 GNUNET_PEER_Id first_hop;
120 * Max data rate to this peer
125 * Handle to stop the DHT search for a path to this peer
127 struct GNUNET_DHT_GetHandle *dhtget;
131 typedef uint32_t MESH_PathID;
135 * Information regarding a path
146 * Id of the path, in case it's needed
151 * Whether the path is serving traffic in a tunnel or is a backup
156 * List of all the peers that form the path from origin to target
158 GNUNET_PEER_Id *peers;
163 * Data scheduled to transmit (to local client or remote peer)
170 struct MESH_queue *next;
171 struct MESH_queue *prev;
174 * Size of the message to transmit
179 * How old is the data?
181 struct GNUNET_TIME_Absolute timestamp;
186 struct GNUNET_MessageHeader *data;
190 struct Client; /* FWD declaration */
192 * Struct containing all information regarding a tunnel
193 * For an intermediate node the improtant info used will be:
194 * - OID \ To identify
196 * - paths[0] | To know where to send it next
197 * - metainfo: ready, speeds, accounting
198 * For an end node more fields will be needed (client-handling)
206 struct MESH_tunnel *next;
207 struct MESH_tunnel *prev;
210 * Origin ID: Node that created the tunnel
215 * Tunnel number (unique for a given oid)
220 * Minimal speed for this tunnel in kb/s
225 * Maximal speed for this tunnel in kb/s
230 * Last time the tunnel was used
232 struct GNUNET_TIME_Absolute timestamp;
235 * Peers in the tunnel, for future optimizations
237 struct PeerInfo *peers_head;
238 struct PeerInfo *peers_tail;
241 * Number of peers that are connected and potentially ready to receive data
243 unsigned int peers_ready;
246 * Number of peers that have been added to the tunnel
248 unsigned int peers_total;
251 * Paths (used and backup)
253 struct Path *paths_head;
254 struct Path *paths_tail;
257 * If this tunnel was created by a local client, what's its handle?
259 struct Client *client;
262 * Messages ready to transmit
264 struct MESH_queue *out_head;
265 struct MESH_queue *out_tail;
268 * Messages received and not processed
270 struct MESH_queue *in_head;
271 struct MESH_queue *in_tail;
276 * Struct containing information about a client of the service
287 * Tunnels that belong to this client, for convenience on disconnect
289 struct MESH_tunnel *tunnels_head;
290 struct MESH_tunnel *tunnels_tail;
293 * Handle to communicate with the client
295 struct GNUNET_SERVER_Client *handle;
298 * Messages that this client has declared interest in
300 GNUNET_MESH_ApplicationType *messages_subscribed;
301 unsigned int subscription_counter;
305 /******************************************************************************/
306 /*********************** GLOBAL VARIABLES ****************************/
307 /******************************************************************************/
312 static struct Client *clients_head;
313 static struct Client *clients_tail;
316 * Tunnels not owned by this node
318 // static struct MESH_Tunnel *tunnels_head;
319 // static struct MESH_Tunnel *tunnels_tail;
322 * Handle to communicate with core
324 static struct GNUNET_CORE_Handle *core_handle;
329 static struct GNUNET_DHT_Handle *dht_handle;
332 * Local peer own ID (memory efficient handle)
334 static GNUNET_PEER_Id myid;
336 /******************************************************************************/
337 /****************** GENERAL HELPER FUNCTIONS ************************/
338 /******************************************************************************/
341 * Check if client has registered with the service and has not disconnected
342 * @param client the client to check
343 * @return non-NULL if client exists in the global DLL
345 static struct Client *
346 retrieve_client (struct GNUNET_SERVER_Client *client) {
350 if(c->handle == client) return c;
357 * Destroy the path and free any allocated resources linked to it
358 * @param t tunnel the path belongs to
359 * @param p the path to destroy
360 * @return GNUNET_OK on success
363 destroy_path(struct MESH_tunnel *t, struct Path *p) {
364 GNUNET_PEER_decrement_rcs(p->peers, p->length);
365 GNUNET_free(p->peers);
366 GNUNET_CONTAINER_DLL_remove(t->paths_head, t->paths_tail, p);
372 * Destroy the peer_info and free any allocated resources linked to it
373 * @param t tunnel the path belongs to
374 * @param pi the peer_info to destroy
375 * @return GNUNET_OK on success
378 destroy_peer_info(struct MESH_tunnel *t, struct PeerInfo *pi) {
379 GNUNET_PEER_change_rc(pi->id, -1);
380 GNUNET_CONTAINER_DLL_remove(t->peers_head, t->peers_tail, pi);
386 * Destroy the tunnel and free any allocated resources linked to it
387 * @param c client the tunnel belongs to
388 * @param t the tunnel to destroy
389 * @return GNUNET_OK on success
392 destroy_tunnel(struct Client *c, struct MESH_tunnel *t) {
396 for(pi = t->peers_head; pi != NULL; pi = t->peers_head) {
397 destroy_peer_info(t, pi);
400 for(path = t->paths_head; path != NULL; path = t->paths_head) {
401 destroy_path(t, path);
404 GNUNET_CONTAINER_DLL_remove(c->tunnels_head, c->tunnels_tail, t);
409 /******************************************************************************/
410 /******************** MESH NETWORK HANDLERS **************************/
411 /******************************************************************************/
414 * Function called to notify a client about the socket
415 * being ready to queue more data. "buf" will be
416 * NULL and "size" zero if the socket was closed for
417 * writing in the meantime.
420 * @param size number of bytes available in buf
421 * @param buf where the callee should write the message
422 * @return number of bytes written to buf
425 send_core_create_path_for_peer (void *cls, size_t size, void *buf) {
427 struct PeerInfo *peer_info;
428 struct GNUNET_MESH_ManipulatePath *msg;
430 struct GNUNET_PeerIdentity peer_id;
431 struct GNUNET_PeerIdentity *peer_ptr;
434 if(0 == size && NULL == buf) {
435 // TODO retry? cancel?
438 peer_info = (struct PeerInfo *)cls;
439 peer_info->dhtget = NULL;
440 p = peer_info->t->paths_head;
442 if(p->peers[p->length-1] == peer_info->id) {
447 if(p == NULL) return 0; // TODO Notify ERROR Path not found
449 size_needed = sizeof(struct GNUNET_MESH_ManipulatePath)
450 + p->length * sizeof(struct GNUNET_PeerIdentity);
451 if(size < size_needed) {
452 // TODO retry? cancel?
456 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
457 msg->header.size = htons(sizeof(struct GNUNET_MESH_ManipulatePath));
458 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
461 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
462 for(i = 0; i < p->length; i++) {
463 GNUNET_PEER_resolve(p->peers[i], &peer_id);
464 memcpy(&peer_ptr[i], &peer_id, sizeof(struct GNUNET_PeerIdentity));
467 peer_info->state = MESH_PEER_WAITING;
474 * Core handler for path creation
475 * struct GNUNET_CORE_MessageHandler
478 * @param message message
479 * @param peer peer identity this notification is about
480 * @param atsi performance data
481 * @return GNUNET_OK to keep the connection open,
482 * GNUNET_SYSERR to close it (signal serious error)
486 handle_mesh_path_create (void *cls,
487 const struct GNUNET_PeerIdentity *peer,
488 const struct GNUNET_MessageHeader *message,
489 const struct GNUNET_TRANSPORT_ATS_Information
493 /* Find origin & self */
494 /* Search for origin in local tunnels */
495 /* Create tunnel / add path */
496 /* Retransmit to next link in chain, if any (core_notify + callback) */
501 * Core handler for mesh network traffic
504 * @param message message
505 * @param peer peer identity this notification is about
506 * @param atsi performance data
507 * @return GNUNET_OK to keep the connection open,
508 * GNUNET_SYSERR to close it (signal serious error)
511 handle_mesh_network_traffic (void *cls,
512 const struct GNUNET_PeerIdentity *peer,
513 const struct GNUNET_MessageHeader *message,
514 const struct GNUNET_TRANSPORT_ATS_Information
517 if(GNUNET_MESSAGE_TYPE_MESH_DATA_GO == ntohs(message->type)) {
518 /* Retransmit to next in path of tunnel identified by message */
520 } else { /* GNUNET_MESSAGE_TYPE_MESH_DATA_BACK */
521 /* Retransmit to previous in path of tunnel identified by message */
527 * Functions to handle messages from core
529 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
530 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
531 {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_GO, 0},
532 {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_BACK, 0},
538 /******************************************************************************/
539 /********************* MESH LOCAL HANDLES **************************/
540 /******************************************************************************/
543 * notify_client_connection_failure: notify a client that the connection to the
544 * requested remote peer is not possible (for instance, no route found)
545 * Function called when the socket is ready to queue more data."buf" will be
546 * NULL and "size" zero if the socket was closed for writing in the meantime.
549 * @param size number of bytes available in buf
550 * @param buf where the callee should write the message
551 * @return number of bytes written to buf
554 notify_client_connection_failure (void *cls, size_t size, void *buf) {
556 struct PeerInfo *peer_info;
557 struct GNUNET_MESH_PeerControl *msg;
558 struct GNUNET_PeerIdentity id;
560 if(0 == size && NULL == buf) {
561 // TODO retry? cancel?
565 size_needed = sizeof(struct GNUNET_MESH_PeerControl);
566 peer_info = (struct PeerInfo *) cls;
567 msg = (struct GNUNET_MESH_PeerControl *) buf;
568 msg->header.size = htons(sizeof(struct GNUNET_MESH_PeerControl));
569 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
570 msg->tunnel_id = htonl(peer_info->t->tid);
571 GNUNET_PEER_resolve(peer_info->id, &id);
572 memcpy(&msg->peer, &id, sizeof(struct GNUNET_PeerIdentity));
579 * Function to process paths received for a new peer addition. The recorded
580 * paths form the initial tunnel, which can be optimized later.
581 * Called on each result obtained for the DHT search.
584 * @param exp when will this value expire
585 * @param key key of the result
586 * @param get_path NULL-terminated array of pointers
587 * to the peers on reverse GET path (or NULL if not recorded)
588 * @param put_path NULL-terminated array of pointers
589 * to the peers on the PUT path (or NULL if not recorded)
590 * @param type type of the result
591 * @param size number of bytes in data
592 * @param data pointer to the result data
595 dht_get_response_handler(void *cls,
596 struct GNUNET_TIME_Absolute exp,
597 const GNUNET_HashCode * key,
598 const struct GNUNET_PeerIdentity * const *get_path,
599 const struct GNUNET_PeerIdentity * const *put_path,
600 enum GNUNET_BLOCK_Type type,
604 struct PeerInfo *peer_info;
605 struct MESH_tunnel *t;
609 peer_info = (struct PeerInfo *)cls;
612 if(NULL == get_path || NULL == put_path) {
613 // TODO: find ourselves some alternate initial path to the destination
614 GNUNET_SERVER_notify_transmit_ready(
616 sizeof(struct GNUNET_MESH_PeerControl),
617 GNUNET_TIME_relative_get_forever(),
618 ¬ify_client_connection_failure,
623 p = GNUNET_malloc(sizeof(struct Path));
624 GNUNET_CONTAINER_DLL_insert(t->paths_head, t->paths_tail, p);
625 for(i = 0; get_path[i] != NULL; i++);
626 for(i--; i >= 0; i--) {
627 p->peers = GNUNET_realloc(p->peers,
628 sizeof(GNUNET_PEER_Id) * (p->length + 1));
629 p->peers[p->length] = GNUNET_PEER_intern(get_path[i]);
632 for(i = 0; put_path[i] != NULL; i++);
633 for(i--; i >= 0; i--) {
634 p->peers = GNUNET_realloc(p->peers,
635 sizeof(GNUNET_PEER_Id) * (p->length + 1));
636 p->peers[p->length] = GNUNET_PEER_intern(put_path[i]);
639 // p->id = 0; // FIXME generate ID or remove field
641 // peer_info->first_hop = p->peers[1]; // FIXME do this on path completion
642 GNUNET_CORE_notify_transmit_ready(core_handle,
645 GNUNET_TIME_relative_get_forever(),
647 sizeof(struct GNUNET_MESH_ManipulatePath)
649 * sizeof (struct GNUNET_PeerIdentity)),
650 &send_core_create_path_for_peer,
657 * Handler for client disconnection
660 * @param client identification of the client; NULL
661 * for the last call when the server is destroyed
664 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
666 struct Client *c, *next;
667 struct MESH_tunnel *t;
671 if (c->handle == client) {
672 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
673 while (NULL != (t = c->tunnels_head)) {
674 destroy_tunnel(c, t);
676 GNUNET_free (c->messages_subscribed);
688 * Handler for new clients
691 * @param client identification of the client
692 * @param message the actual message, which includes messages the client wants
695 handle_local_new_client (void *cls,
696 struct GNUNET_SERVER_Client *client,
697 const struct GNUNET_MessageHeader *message)
700 unsigned int payload_size;
702 /* Check data sanity */
703 payload_size = message->size - sizeof(struct GNUNET_MessageHeader);
704 if (0 != payload_size % sizeof(GNUNET_MESH_ApplicationType)) {
706 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
710 /* Create new client structure */
711 c = GNUNET_malloc(sizeof(struct Client));
713 if(payload_size != 0) {
714 c->messages_subscribed = GNUNET_malloc(payload_size);
715 memcpy(c->messages_subscribed, &message[1], payload_size);
717 c->messages_subscribed = NULL;
719 c->subscription_counter = payload_size/sizeof(GNUNET_MESH_ApplicationType);
721 /* Insert new client in DLL */
722 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
724 GNUNET_SERVER_receive_done(client, GNUNET_OK);
729 * Handler for requests of new tunnels
732 * @param client identification of the client
733 * @param message the actual message
736 handle_local_tunnel_create (void *cls,
737 struct GNUNET_SERVER_Client *client,
738 const struct GNUNET_MessageHeader *message)
740 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
741 struct MESH_tunnel *t;
744 /* Sanity check for client registration */
745 if(NULL == (c = retrieve_client(client))) {
747 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
751 /* Message sanity check */
752 if(sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
754 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
758 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
759 /* Sanity check for tunnel numbering */
760 if(0 == (ntohl(tunnel_msg->tunnel_id) & 0x80000000)) {
762 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
765 /* Sanity check for duplicate tunnel IDs */
768 if(t->tid == ntohl(tunnel_msg->tunnel_id)) {
770 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
775 /* FIXME: calloc? Is NULL != 0 on any platform? */
776 t = GNUNET_malloc(sizeof(struct MESH_tunnel));
777 t->tid = ntohl(tunnel_msg->tunnel_id);
781 GNUNET_CONTAINER_DLL_insert(c->tunnels_head, c->tunnels_tail, t);
783 GNUNET_SERVER_receive_done(client, GNUNET_OK);
788 * Handler for requests of deleting tunnels
791 * @param client identification of the client
792 * @param message the actual message
795 handle_local_tunnel_destroy (void *cls,
796 struct GNUNET_SERVER_Client *client,
797 const struct GNUNET_MessageHeader *message)
799 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
801 struct MESH_tunnel *t;
804 /* Sanity check for client registration */
805 if(NULL == (c = retrieve_client(client))) {
807 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
810 /* Message sanity check */
811 if(sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
813 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
817 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
820 tid = ntohl(tunnel_msg->tunnel_id);
821 if(NULL == (t = c->tunnels_head)) {
823 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
830 if(t == c->tunnels_tail) {
832 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
838 destroy_tunnel(c, t);
840 GNUNET_SERVER_receive_done(client, GNUNET_OK);
845 * Handler for connection requests to new peers
848 * @param client identification of the client
849 * @param message the actual message (PeerControl)
852 handle_local_connect_add (void *cls,
853 struct GNUNET_SERVER_Client *client,
854 const struct GNUNET_MessageHeader *message)
856 struct GNUNET_MESH_PeerControl *peer_msg;
858 struct MESH_tunnel *t;
860 struct PeerInfo *peer_info;
865 /* Sanity check for client registration */
866 if(NULL == (c = retrieve_client(client))) {
868 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
872 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
873 /* Sanity check for message size */
874 if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(peer_msg->header.size)) {
876 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
881 tid = ntohl(peer_msg->tunnel_id);
891 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
895 /* Does client own tunnel? */
896 if(t->client->handle != client) {
898 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
902 /* Ok, add peer to tunnel */
903 peer_info = (struct PeerInfo *) GNUNET_malloc(sizeof(struct PeerInfo));
904 peer_info->id = GNUNET_PEER_intern(&peer_msg->peer);
905 peer_info->state = MESH_PEER_SEARCHING;
908 GNUNET_CONTAINER_DLL_insert(t->peers_head, t->peers_tail, peer_info);
909 /* Start DHT search */
910 GNUNET_CRYPTO_hash (&peer_msg->peer,
911 sizeof(struct GNUNET_PeerIdentity),
913 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
914 GNUNET_TIME_relative_get_forever(),
915 GNUNET_BLOCK_TYPE_ANY,
917 4, /* replication level */
918 GNUNET_DHT_RO_RECORD_ROUTE,
919 NULL, /* bloom filter */
923 dht_get_response_handler,
926 GNUNET_SERVER_receive_done(client, GNUNET_OK);
932 * Handler for disconnection requests of peers in a tunnel
935 * @param client identification of the client
936 * @param message the actual message (PeerControl)
939 handle_local_connect_del (void *cls,
940 struct GNUNET_SERVER_Client *client,
941 const struct GNUNET_MessageHeader *message)
943 struct GNUNET_MESH_PeerControl *peer_msg;
945 struct MESH_tunnel *t;
947 struct Path *aux_path;
949 GNUNET_PEER_Id peer_id;
950 struct PeerInfo *peer_info;
951 struct PeerInfo *aux_peer_info;
953 /* Sanity check for client registration */
954 if(NULL == (c = retrieve_client(client))) {
956 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
959 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
960 /* Sanity check for message size */
961 if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(peer_msg->header.size)) {
963 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
968 tid = ntohl(peer_msg->tunnel_id);
969 if(NULL == (t = c->tunnels_head)) {
971 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
978 if(t == c->tunnels_tail) {
980 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
987 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
991 /* Does client own tunnel? */
992 if(t->client->handle != client) {
994 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
998 /* Ok, delete peer from tunnel */
999 peer_id = GNUNET_PEER_intern(&peer_msg->peer);
1004 if(p->peers[p->length-1] == peer_id) { /* one path per destination */
1005 GNUNET_CONTAINER_DLL_remove(t->paths_head, t->paths_tail, p);
1006 GNUNET_PEER_decrement_rcs(p->peers, p->length);
1009 GNUNET_free(aux_path);
1015 /*Delete peer info */
1016 peer_info = t->peers_head;
1017 while(peer_info != NULL) {
1018 if(peer_info->id == peer_id) {
1019 GNUNET_CONTAINER_DLL_remove(t->peers_head,
1022 aux_peer_info = peer_info;
1023 peer_info = peer_info->next;
1024 GNUNET_free(aux_peer_info);
1026 peer_info = peer_info->next;
1030 GNUNET_PEER_change_rc(peer_id, -1);
1032 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1038 * Handler for connection requests to new peers by type
1040 * @param cls closure
1041 * @param client identification of the client
1042 * @param message the actual message (ConnectPeerByType)
1045 handle_local_connect_by_type (void *cls,
1046 struct GNUNET_SERVER_Client *client,
1047 const struct GNUNET_MessageHeader *message)
1049 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
1051 GNUNET_MESH_ApplicationType application;
1053 struct MESH_tunnel *t;
1055 /* Sanity check for client registration */
1056 if(NULL == (c = retrieve_client(client))) {
1058 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1062 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *)message;
1063 /* Sanity check for message size */
1064 if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(connect_msg->header.size)) {
1066 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1070 /* Tunnel exists? */
1071 tid = ntohl(connect_msg->tunnel_id);
1072 t = c->tunnels_head;
1081 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1085 /* Does client own tunnel? */
1086 if(t->client->handle != client) {
1088 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1092 /* Ok, lets find a peer offering the service */
1093 application = ntohl(connect_msg->type);
1094 application++; // FIXME silence warnings
1096 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1102 * Handler for client traffic directed to one peer
1104 * @param cls closure
1105 * @param client identification of the client
1106 * @param message the actual message
1109 handle_local_network_traffic (void *cls,
1110 struct GNUNET_SERVER_Client *client,
1111 const struct GNUNET_MessageHeader *message)
1114 struct MESH_tunnel *t;
1115 struct GNUNET_MESH_Data *data_msg;
1118 /* Sanity check for client registration */
1119 if(NULL == (c = retrieve_client(client))) {
1121 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1124 data_msg = (struct GNUNET_MESH_Data *)message;
1125 /* Sanity check for message size */
1126 if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(data_msg->header.size)) {
1128 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1132 /* Tunnel exists? */
1133 tid = ntohl(data_msg->tunnel_id);
1134 t = c->tunnels_head;
1143 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1147 /* Does client own tunnel? */
1148 if(t->client->handle != client) {
1150 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1156 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1161 * Handler for client traffic directed to all peers in a tunnel
1163 * @param cls closure
1164 * @param client identification of the client
1165 * @param message the actual message
1168 handle_local_network_traffic_bcast (void *cls,
1169 struct GNUNET_SERVER_Client *client,
1170 const struct GNUNET_MessageHeader *message)
1173 struct MESH_tunnel *t;
1174 struct GNUNET_MESH_DataBroadcast *data_msg;
1177 /* Sanity check for client registration */
1178 if(NULL == (c = retrieve_client(client))) {
1180 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1183 data_msg = (struct GNUNET_MESH_DataBroadcast *)message;
1184 /* Sanity check for message size */
1185 if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(data_msg->header.size)) {
1187 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1191 /* Tunnel exists? */
1192 tid = ntohl(data_msg->tunnel_id);
1193 t = c->tunnels_head;
1202 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1206 /* Does client own tunnel? */
1207 if(t->client->handle != client) {
1209 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1215 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1220 * Functions to handle messages from clients
1222 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1223 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
1224 {&handle_local_tunnel_create, NULL,
1225 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
1226 sizeof(struct GNUNET_MESH_TunnelMessage)},
1227 {&handle_local_tunnel_destroy, NULL,
1228 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
1229 sizeof(struct GNUNET_MESH_TunnelMessage)},
1230 {&handle_local_connect_add, NULL,
1231 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD,
1232 sizeof(struct GNUNET_MESH_PeerControl)},
1233 {&handle_local_connect_del, NULL,
1234 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL,
1235 sizeof(struct GNUNET_MESH_PeerControl)},
1236 {&handle_local_connect_by_type, NULL,
1237 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE,
1238 sizeof(struct GNUNET_MESH_ConnectPeerByType)},
1239 {&handle_local_network_traffic, NULL,
1240 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
1241 {&handle_local_network_traffic_bcast, NULL,
1242 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0},
1248 * To be called on core init/fail.
1250 * @param cls service closure
1251 * @param server handle to the server for this service
1252 * @param identity the public identity of this peer
1253 * @param publicKey the public key of this peer
1256 core_init (void *cls,
1257 struct GNUNET_CORE_Handle *server,
1258 const struct GNUNET_PeerIdentity *identity,
1259 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
1261 core_handle = server;
1262 myid = GNUNET_PEER_intern(identity);
1267 * Method called whenever a given peer connects.
1269 * @param cls closure
1270 * @param peer peer identity this notification is about
1271 * @param atsi performance data for the connection
1274 core_connect (void *cls,
1275 const struct GNUNET_PeerIdentity *peer,
1276 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1282 * Method called whenever a peer disconnects.
1284 * @param cls closure
1285 * @param peer peer identity this notification is about
1288 core_disconnect (void *cls,
1290 GNUNET_PeerIdentity *peer)
1295 /******************************************************************************/
1296 /************************ MAIN FUNCTIONS ****************************/
1297 /******************************************************************************/
1300 * Task run during shutdown.
1306 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1308 if (core_handle != NULL)
1310 GNUNET_CORE_disconnect (core_handle);
1313 if (dht_handle != NULL)
1315 GNUNET_DHT_disconnect (dht_handle);
1321 * Process mesh requests.
1323 * @param cls closure
1324 * @param server the initialized server
1325 * @param c configuration to use
1329 struct GNUNET_SERVER_Handle *server,
1330 const struct GNUNET_CONFIGURATION_Handle *c)
1332 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "******* MESH DEBUG MESSAGE 3 ********\n");
1333 GNUNET_SERVER_add_handlers (server, plugin_handlers);
1334 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
1335 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
1336 32, /* queue size */
1337 NULL, /* Closure passed to MESH functions */
1338 &core_init, /* Call core_init once connected */
1339 &core_connect, /* Handle connects */
1340 &core_disconnect, /* remove peers on disconnects */
1341 NULL, /* Do we care about "status" updates? */
1342 NULL, /* Don't notify about all incoming messages */
1343 GNUNET_NO, /* For header only in notification */
1344 NULL, /* Don't notify about all outbound messages */
1345 GNUNET_NO, /* For header-only out notification */
1346 core_handlers); /* Register these handlers */
1347 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "******* MESH DEBUG MESSAGE 4 ********\n");
1348 if (core_handle == NULL) {
1351 dht_handle = GNUNET_DHT_connect(c, 100); /* FIXME ht len correct size? */
1352 if (dht_handle == NULL) {
1356 /* Scheduled the task to clean up when shutdown is called */
1357 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1358 &shutdown_task, NULL);
1363 * The main function for the mesh service.
1365 * @param argc number of arguments from the command line
1366 * @param argv command line arguments
1367 * @return 0 ok, 1 on error
1370 main (int argc, char *const *argv)
1373 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "******* MESH DEBUG MESSAGE 1 ********\n");
1375 GNUNET_SERVICE_run (argc,
1378 GNUNET_SERVICE_OPTION_NONE,
1379 &run, NULL)) ? 0 : 1;
1380 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "******* MESH DEBUG MESSAGE 2 ********\n");