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.
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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 (info_for_data_to_origin with all info to build packet)
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);
766 * Function called to notify a client about the socket
767 * being ready to queue more data. "buf" will be
768 * NULL and "size" zero if the socket was closed for
769 * writing in the meantime.
771 * @param cls closure (data itself)
772 * @param size number of bytes available in buf
773 * @param buf where the callee should write the message
774 * @return number of bytes written to buf
777 send_core_data_from_origin (void *cls, size_t size, void *buf)
779 struct GNUNET_MESH_DataMessageFromOrigin *msg = cls;
782 GNUNET_assert(NULL != msg);
783 total_size = ntohs(msg->header.size);
785 if (total_size > size) {
786 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
787 "not enough buffer to send data futher\n");
790 memcpy(msg, buf, total_size);
797 * Function called to notify a client about the socket
798 * being ready to queue more data. "buf" will be
799 * NULL and "size" zero if the socket was closed for
800 * writing in the meantime.
802 * @param cls closure (data itself)
803 * @param size number of bytes available in buf
804 * @param buf where the callee should write the message
805 * @return number of bytes written to buf
808 send_core_data_to_peer (void *cls, size_t size, void *buf)
810 struct info_for_data_to_origin *info = cls;
811 struct GNUNET_MESH_DataMessageToOrigin *msg = buf;
814 GNUNET_assert(NULL != info);
815 total_size = sizeof(struct GNUNET_MESH_DataMessageToOrigin) + info->size;
816 /* FIXME better constant? short >= 16 bits, not == 16 bits... */
817 GNUNET_assert(total_size < USHRT_MAX);
819 if (total_size > size) {
820 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
821 "not enough buffer to send data to origin\n");
824 msg->header.size = htons(total_size);
825 msg->header.type = htons(GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
826 GNUNET_PEER_resolve(info->origin->oid, &msg->oid);
827 msg->tid = htonl(info->origin->tid);
828 if (0 != info->size && NULL != info->data) {
829 memcpy(&msg[1], info->data, info->size);
837 * Send another peer a notification to destroy a tunnel
838 * @param cls The tunnel to destroy
839 * @param size Size in the buffer
840 * @param buf Memory where to put the data to transmit
841 * @return Size of data put in buffer
844 send_p2p_tunnel_destroy(void *cls, size_t size, void *buf)
846 struct MeshTunnel *t = cls;
847 struct MeshClient *c;
848 struct GNUNET_MESH_TunnelMessage *msg;
852 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY); /*FIXME*/
853 msg->header.size = htons(sizeof(struct GNUNET_MESH_TunnelMessage));
854 msg->tunnel_id = htonl(t->id.tid);
856 destroy_tunnel(c, t);
857 return sizeof(struct GNUNET_MESH_TunnelMessage);
862 /******************************************************************************/
863 /******************** MESH NETWORK HANDLERS **************************/
864 /******************************************************************************/
868 * Core handler for path creation
869 * struct GNUNET_CORE_MessageHandler
872 * @param message message
873 * @param peer peer identity this notification is about
874 * @param atsi performance data
875 * @return GNUNET_OK to keep the connection open,
876 * GNUNET_SYSERR to close it (signal serious error)
880 handle_mesh_path_create (void *cls,
881 const struct GNUNET_PeerIdentity *peer,
882 const struct GNUNET_MessageHeader *message,
883 const struct GNUNET_TRANSPORT_ATS_Information
886 unsigned int own_pos;
889 MESH_TunnelNumber tid;
890 struct GNUNET_MESH_ManipulatePath *msg;
891 struct GNUNET_PeerIdentity *pi;
892 struct GNUNET_PeerIdentity id;
893 GNUNET_HashCode hash;
894 struct MeshPath *path;
895 struct MeshPeerInfo *dest_peer_info;
896 struct MeshPeerInfo *orig_peer_info;
897 struct MeshTunnel *t;
900 size = ntohs(message->size);
901 if (size < sizeof(struct GNUNET_MESH_ManipulatePath)) {
902 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
903 "received create path message too short\n");
907 size -= sizeof(struct GNUNET_MESH_ManipulatePath);
908 if (size < 2 * sizeof(struct GNUNET_PeerIdentity)) {
909 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
910 "create path message lacks enough peers\n");
913 if (size % sizeof(struct GNUNET_PeerIdentity)) {
914 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
915 "create path message of wrong size\n");
918 msg = (struct GNUNET_MESH_ManipulatePath *) message;
919 size /= sizeof(struct GNUNET_PeerIdentity);
921 tid = ntohl(msg->tid);
922 pi = (struct GNUNET_PeerIdentity *) &msg[1];
923 t = retrieve_tunnel(pi, tid);
926 t = GNUNET_malloc(sizeof(struct MeshTunnel));
927 t->id.oid = GNUNET_PEER_intern(pi);
931 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
933 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
935 GNUNET_CONTAINER_multihashmap_put(tunnels,
938 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
940 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
941 "create path: could not store tunnel in hashmap\n");
946 dest_peer_info = GNUNET_CONTAINER_multihashmap_get(peers,
947 &pi[size - 1].hashPubKey);
948 if (NULL == dest_peer_info) {
949 dest_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
950 dest_peer_info->id = GNUNET_PEER_intern(&pi[size - 1]);
951 dest_peer_info->state = MESH_PEER_WAITING;
952 GNUNET_CONTAINER_multihashmap_put(peers,
953 &pi[size - 1].hashPubKey,
955 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
957 orig_peer_info = GNUNET_CONTAINER_multihashmap_get(peers, &pi->hashPubKey);
958 if (NULL == orig_peer_info) {
959 orig_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
960 orig_peer_info->id = GNUNET_PEER_intern(pi);
961 orig_peer_info->state = MESH_PEER_WAITING;
962 GNUNET_CONTAINER_multihashmap_put(peers,
965 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
969 path = GNUNET_malloc(sizeof(struct MeshPath));
971 path->peers = GNUNET_malloc(size * sizeof(GNUNET_PEER_Id));
973 for (i = 0; i < size; i++) {
974 path->peers[i] = GNUNET_PEER_intern(&pi[i]);
975 if (path->peers[i] == myid) own_pos = i;
977 if (own_pos == 0) { /* cannot be self, must be 'not found' */
978 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
979 "create path: self not found in path through self\n");
981 /* FIXME error. destroy tunnel? leave for timeout? */
984 if (own_pos == size - 1) { /* it is for us! */
985 add_path_to_origin(orig_peer_info, path); /* inverts path! */
986 GNUNET_PEER_resolve(get_first_hop(path), &id); /* path is inverted :) */
988 * is it allowed/desired to declare variables this way?
989 * (style, best bractices, etc)
990 * This variable is short lived and completely irrelevant for the rest
993 struct info_for_data_to_origin *info =
994 GNUNET_malloc(sizeof(struct info_for_data_to_origin));
995 info->origin = &t->id;
998 GNUNET_CORE_notify_transmit_ready(core_handle,
1001 GNUNET_TIME_UNIT_FOREVER_REL,
1003 sizeof(struct GNUNET_MessageHeader),
1004 &send_core_data_to_origin,
1007 add_path_to_peer(dest_peer_info, path);
1008 GNUNET_PEER_resolve(get_first_hop(path), &id);
1009 GNUNET_CORE_notify_transmit_ready(core_handle,
1012 GNUNET_TIME_UNIT_FOREVER_REL,
1014 sizeof(struct GNUNET_MessageHeader),
1015 &send_core_create_path_for_peer,
1023 * Core handler for mesh network traffic going from the origin to a peer
1025 * @param cls closure
1026 * @param message message
1027 * @param peer peer identity this notification is about
1028 * @param atsi performance data
1029 * @return GNUNET_OK to keep the connection open,
1030 * GNUNET_SYSERR to close it (signal serious error)
1033 handle_mesh_data_unicast (void *cls,
1034 const struct GNUNET_PeerIdentity *peer,
1035 const struct GNUNET_MessageHeader *message,
1036 const struct GNUNET_TRANSPORT_ATS_Information
1039 struct GNUNET_MESH_DataMessageFromOrigin *msg;
1040 struct GNUNET_PeerIdentity id;
1041 struct MeshTunnel *t;
1042 struct MeshPeerInfo *pi;
1045 size = ntohs(message->size);
1046 if (size < sizeof(struct GNUNET_MESH_DataMessageFromOrigin)) {
1047 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1048 "got data from origin packet: too short\n");
1049 return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
1051 msg = (struct GNUNET_MESH_DataMessageFromOrigin *) message;
1052 t = retrieve_tunnel(&msg->oid, ntohl(msg->tid));
1053 pi = GNUNET_CONTAINER_multihashmap_get(t->peers,
1054 &msg->destination.hashPubKey);
1056 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1057 "got invalid data from origin packet: wrong destination\n");
1058 /* TODO are we so nice to try to deliver it anyway? maybe we missed
1059 * a Create_path packed that added the peer but we have it in the global
1060 * peer pool anyway...
1062 return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
1064 GNUNET_PEER_resolve(get_first_hop(pi->path), &id);
1065 GNUNET_CORE_notify_transmit_ready(core_handle,
1068 GNUNET_TIME_UNIT_FOREVER_REL,
1071 &send_core_data_from_origin,
1078 * Core handler for mesh network traffic going from the origin to all peers
1080 * @param cls closure
1081 * @param message message
1082 * @param peer peer identity this notification is about
1083 * @param atsi performance data
1084 * @return GNUNET_OK to keep the connection open,
1085 * GNUNET_SYSERR to close it (signal serious error)
1088 handle_mesh_data_multicast (void *cls,
1089 const struct GNUNET_PeerIdentity *peer,
1090 const struct GNUNET_MessageHeader *message,
1091 const struct GNUNET_TRANSPORT_ATS_Information
1094 // struct GNUNET_MESH_DataMessageMulticast *msg = message;
1100 * Core handler for mesh network traffic
1102 * @param cls closure
1103 * @param message message
1104 * @param peer peer identity this notification is about
1105 * @param atsi performance data
1106 * @return GNUNET_OK to keep the connection open,
1107 * GNUNET_SYSERR to close it (signal serious error)
1110 handle_mesh_data_to_orig (void *cls,
1111 const struct GNUNET_PeerIdentity *peer,
1112 const struct GNUNET_MessageHeader *message,
1113 const struct GNUNET_TRANSPORT_ATS_Information
1116 // struct GNUNET_MESH_DataMessageToOrigin *msg = message;
1122 * Functions to handle messages from core
1124 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1125 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1126 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN, 0},
1127 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_DATA_MULTICAST, 0},
1128 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN, 0},
1134 /******************************************************************************/
1135 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1136 /******************************************************************************/
1139 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1140 * client when the client disconnects.
1141 * @param cls closure (client that is disconnecting)
1142 * @param key the hash of the local tunnel id (used to access the hashmap)
1143 * @param value the value stored at the key (tunnel to destroy)
1144 * @return GNUNET_OK on success
1147 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value) {
1149 r = destroy_tunnel((struct MeshTunnel *) value);
1155 * notify_client_connection_failure: notify a client that the connection to the
1156 * requested remote peer is not possible (for instance, no route found)
1157 * Function called when the socket is ready to queue more data. "buf" will be
1158 * NULL and "size" zero if the socket was closed for writing in the meantime.
1160 * @param cls closure
1161 * @param size number of bytes available in buf
1162 * @param buf where the callee should write the message
1163 * @return number of bytes written to buf
1166 notify_client_connection_failure (void *cls, size_t size, void *buf)
1169 struct MeshPeerInfo *peer_info;
1170 struct GNUNET_MESH_PeerControl *msg;
1171 struct GNUNET_PeerIdentity id;
1173 if (0 == size && NULL == buf) {
1174 // TODO retry? cancel?
1178 size_needed = sizeof(struct GNUNET_MESH_PeerControl);
1179 peer_info = (struct MeshPeerInfo *) cls;
1180 msg = (struct GNUNET_MESH_PeerControl *) buf;
1181 msg->header.size = htons(sizeof(struct GNUNET_MESH_PeerControl));
1182 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1183 // msg->tunnel_id = htonl(peer_info->t->tid);
1184 GNUNET_PEER_resolve(peer_info->id, &id);
1185 memcpy(&msg->peer, &id, sizeof(struct GNUNET_PeerIdentity));
1193 * Send keepalive packets for a peer
1199 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1201 struct MeshPeerInfo *peer_info = cls;
1202 struct GNUNET_PeerIdentity id;
1204 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) return;
1205 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
1206 GNUNET_CORE_notify_transmit_ready(core_handle,
1209 GNUNET_TIME_UNIT_FOREVER_REL,
1211 sizeof(struct GNUNET_MESH_ManipulatePath)
1212 + (peer_info->path->length
1213 * sizeof (struct GNUNET_PeerIdentity)),
1214 &send_core_create_path_for_peer,
1222 * Function to process paths received for a new peer addition. The recorded
1223 * paths form the initial tunnel, which can be optimized later.
1224 * Called on each result obtained for the DHT search.
1226 * @param cls closure
1227 * @param exp when will this value expire
1228 * @param key key of the result
1229 * @param get_path NULL-terminated array of pointers
1230 * to the peers on reverse GET path (or NULL if not recorded)
1231 * @param put_path NULL-terminated array of pointers
1232 * to the peers on the PUT path (or NULL if not recorded)
1233 * @param type type of the result
1234 * @param size number of bytes in data
1235 * @param data pointer to the result data
1238 dht_get_response_handler(void *cls,
1239 struct GNUNET_TIME_Absolute exp,
1240 const GNUNET_HashCode * key,
1241 const struct GNUNET_PeerIdentity * const *get_path,
1242 const struct GNUNET_PeerIdentity * const *put_path,
1243 enum GNUNET_BLOCK_Type type,
1247 struct MeshPeerInfo *peer_info = cls;
1249 struct GNUNET_PeerIdentity pi;
1252 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path) {
1253 // Find ourselves some alternate initial path to the destination: retry
1254 GNUNET_DHT_get_stop(peer_info->dhtget);
1255 GNUNET_PEER_resolve(peer_info->id, &pi);
1256 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1257 GNUNET_TIME_UNIT_FOREVER_REL,
1258 GNUNET_BLOCK_TYPE_ANY,
1260 4, /* replication level */
1261 GNUNET_DHT_RO_RECORD_ROUTE,
1262 NULL, /* bloom filter */
1265 0, /* xquery bits */
1266 dht_get_response_handler,
1270 p = GNUNET_malloc(sizeof(struct MeshPath));
1271 for (i = 0; get_path[i] != NULL; i++);
1272 for (i--; i >= 0; i--) {
1273 p->peers = GNUNET_realloc(p->peers,
1274 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1275 p->peers[p->length] = GNUNET_PEER_intern(get_path[i]);
1278 for (i = 0; put_path[i] != NULL; i++);
1279 for (i--; i >= 0; i--) {
1280 p->peers = GNUNET_realloc(p->peers,
1281 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1282 p->peers[p->length] = GNUNET_PEER_intern(put_path[i]);
1285 add_path_to_peer(peer_info, p);
1286 GNUNET_CORE_notify_transmit_ready(core_handle,
1289 GNUNET_TIME_UNIT_FOREVER_REL,
1291 sizeof(struct GNUNET_MESH_ManipulatePath)
1293 * sizeof (struct GNUNET_PeerIdentity)),
1294 &send_core_create_path_for_peer,
1296 GNUNET_SCHEDULER_add_delayed(REFRESH_PATH_TIME, &path_refresh, peer_info);
1301 /******************************************************************************/
1302 /********************* MESH LOCAL HANDLES **************************/
1303 /******************************************************************************/
1307 * Handler for client disconnection
1309 * @param cls closure
1310 * @param client identification of the client; NULL
1311 * for the last call when the server is destroyed
1314 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
1316 struct MeshClient *c;
1317 struct MeshClient *next;
1319 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1320 "client disconnected\n");
1323 if (c->handle == client) {
1324 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1325 " matching client found, cleaning\n");
1326 GNUNET_CONTAINER_multihashmap_iterate(c->tunnels,
1327 &delete_tunnel_entry,
1329 GNUNET_CONTAINER_multihashmap_destroy(c->tunnels);
1330 if(0 != c->app_counter) GNUNET_free (c->apps);
1331 if(0 != c->type_counter) GNUNET_free (c->types);
1332 GNUNET_CONTAINER_DLL_remove(clients, clients_tail, c);
1337 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1338 " ... searching\n");
1342 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1349 * Handler for new clients
1351 * @param cls closure
1352 * @param client identification of the client
1353 * @param message the actual message, which includes messages the client wants
1356 handle_local_new_client (void *cls,
1357 struct GNUNET_SERVER_Client *client,
1358 const struct GNUNET_MessageHeader *message)
1360 struct GNUNET_MESH_ClientConnect *cc_msg;
1361 struct MeshClient *c;
1366 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
1367 /* Check data sanity */
1368 size = ntohs(message->size) - sizeof(struct GNUNET_MESH_ClientConnect);
1369 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
1370 types = ntohs(cc_msg->types);
1371 apps = ntohs(cc_msg->applications);
1373 types * sizeof(uint16_t) + apps * sizeof(GNUNET_MESH_ApplicationType))
1376 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1380 /* Create new client structure */
1381 c = GNUNET_malloc(sizeof(struct MeshClient));
1384 c->type_counter = types;
1385 c->types = GNUNET_malloc(types * sizeof(uint16_t));
1386 memcpy(c->types, &message[1], types * sizeof(uint16_t));
1389 c->app_counter = apps;
1390 c->apps = GNUNET_malloc(apps * sizeof(GNUNET_MESH_ApplicationType));
1392 &message[1] + types * sizeof(uint16_t),
1393 apps * sizeof(GNUNET_MESH_ApplicationType));
1395 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1396 " client has %u+%u subscriptions\n",
1400 GNUNET_CONTAINER_DLL_insert(clients, clients_tail, c);
1401 c->tunnels = GNUNET_CONTAINER_multihashmap_create(32);
1403 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1409 * Handler for requests of new tunnels
1411 * @param cls closure
1412 * @param client identification of the client
1413 * @param message the actual message
1416 handle_local_tunnel_create (void *cls,
1417 struct GNUNET_SERVER_Client *client,
1418 const struct GNUNET_MessageHeader *message)
1420 struct GNUNET_MESH_TunnelMessage *t_msg;
1421 struct MeshTunnel *t;
1422 struct MeshClient *c;
1423 GNUNET_HashCode hash;
1425 /* Sanity check for client registration */
1426 if (NULL == (c = retrieve_client(client))) {
1428 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1432 /* Message sanity check */
1433 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1435 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1439 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1440 /* Sanity check for tunnel numbering */
1441 if (0 == (ntohl(t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_MARK)) {
1443 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1446 /* Sanity check for duplicate tunnel IDs */
1447 if(NULL != retrieve_tunnel_by_local_id(c, ntohl(t_msg->tunnel_id))) {
1449 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1453 t = GNUNET_malloc(sizeof(struct MeshTunnel));
1454 while (NULL != retrieve_tunnel_by_pi(myid, next_tid))
1455 next_tid = (next_tid + 1) % GNUNET_MESH_LOCAL_TUNNEL_ID_MARK;
1456 t->id.tid = next_tid++;
1458 t->local_tid = ntohl(t_msg->tunnel_id);
1460 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
1462 GNUNET_CRYPTO_hash(&t->local_tid, sizeof(MESH_TunnelNumber), &hash);
1464 GNUNET_CONTAINER_multihashmap_put(c->tunnels, &hash, t,
1465 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1468 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1472 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1474 GNUNET_CONTAINER_multihashmap_put(tunnels, &hash, t,
1475 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1478 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1482 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1488 * Handler for requests of deleting tunnels
1490 * @param cls closure
1491 * @param client identification of the client
1492 * @param message the actual message
1495 handle_local_tunnel_destroy (void *cls,
1496 struct GNUNET_SERVER_Client *client,
1497 const struct GNUNET_MessageHeader *message)
1499 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
1500 struct MeshClient *c;
1501 struct MeshTunnel *t;
1502 MESH_TunnelNumber tid;
1503 GNUNET_HashCode hash;
1506 /* Sanity check for client registration */
1507 if (NULL == (c = retrieve_client(client))) {
1509 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1512 /* Message sanity check */
1513 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1515 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1519 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1521 /* Retrieve tunnel */
1522 tid = ntohl(tunnel_msg->tunnel_id);
1524 /* Remove from local id hashmap */
1525 GNUNET_CRYPTO_hash(&tid, sizeof(MESH_TunnelNumber), &hash);
1526 t = GNUNET_CONTAINER_multihashmap_get(c->tunnels, &hash);
1527 GNUNET_CONTAINER_multihashmap_remove(c->tunnels, &hash, t);
1529 /* Remove from global id hashmap */
1530 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1531 GNUNET_CONTAINER_multihashmap_remove(tunnels, &hash, t);
1533 // notify_tunnel_destroy(t);
1534 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1540 * Handler for connection requests to new peers
1542 * @param cls closure
1543 * @param client identification of the client
1544 * @param message the actual message (PeerControl)
1547 handle_local_connect_add (void *cls,
1548 struct GNUNET_SERVER_Client *client,
1549 const struct GNUNET_MessageHeader *message)
1551 struct GNUNET_MESH_PeerControl *peer_msg;
1552 struct MeshClient *c;
1553 struct MeshTunnel *t;
1554 MESH_TunnelNumber tid;
1555 struct MeshPeerInfo *peer_info;
1558 /* Sanity check for client registration */
1559 if (NULL == (c = retrieve_client(client))) {
1561 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1565 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1566 /* Sanity check for message size */
1567 if (sizeof(struct GNUNET_MESH_PeerControl)
1568 != ntohs(peer_msg->header.size))
1571 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1575 /* Tunnel exists? */
1576 tid = ntohl(peer_msg->tunnel_id);
1577 t = retrieve_tunnel_by_local_id(c, tid);
1580 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1584 /* Does client own tunnel? */
1585 if (t->client->handle != client) {
1587 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1592 peer_info = get_peer_info(&peer_msg->peer);
1594 /* Start DHT search if needed */
1595 if(MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget) {
1596 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1597 GNUNET_TIME_UNIT_FOREVER_REL,
1598 GNUNET_BLOCK_TYPE_ANY,
1599 &peer_msg->peer.hashPubKey,
1600 4, /* replication level */
1601 GNUNET_DHT_RO_RECORD_ROUTE,
1602 NULL, /* bloom filter */
1605 0, /* xquery bits */
1606 dht_get_response_handler,
1610 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1616 * Handler for disconnection requests of peers in a tunnel
1618 * @param cls closure
1619 * @param client identification of the client
1620 * @param message the actual message (PeerControl)
1623 handle_local_connect_del (void *cls,
1624 struct GNUNET_SERVER_Client *client,
1625 const struct GNUNET_MessageHeader *message)
1627 struct GNUNET_MESH_PeerControl *peer_msg;
1628 struct MeshClient *c;
1629 struct MeshTunnel *t;
1630 MESH_TunnelNumber tid;
1632 /* Sanity check for client registration */
1633 if (NULL == (c = retrieve_client(client))) {
1635 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1638 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1639 /* Sanity check for message size */
1640 if (sizeof(struct GNUNET_MESH_PeerControl)
1641 != ntohs(peer_msg->header.size))
1644 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1648 /* Tunnel exists? */
1649 tid = ntohl(peer_msg->tunnel_id);
1650 t = retrieve_tunnel_by_local_id(c, tid);
1653 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1657 /* Does client own tunnel? */
1658 if (t->client->handle != client) {
1660 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1664 /* Ok, delete peer from tunnel */
1665 GNUNET_CONTAINER_multihashmap_remove_all(t->peers,
1666 &peer_msg->peer.hashPubKey);
1668 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1674 * Handler for connection requests to new peers by type
1676 * @param cls closure
1677 * @param client identification of the client
1678 * @param message the actual message (ConnectPeerByType)
1681 handle_local_connect_by_type (void *cls,
1682 struct GNUNET_SERVER_Client *client,
1683 const struct GNUNET_MessageHeader *message)
1685 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
1686 MESH_TunnelNumber tid;
1687 GNUNET_MESH_ApplicationType application;
1688 struct MeshClient *c;
1689 struct MeshTunnel *t;
1691 /* Sanity check for client registration */
1692 if (NULL == (c = retrieve_client(client))) {
1694 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1698 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *)message;
1699 /* Sanity check for message size */
1700 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1701 ntohs(connect_msg->header.size))
1704 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1708 /* Tunnel exists? */
1709 tid = ntohl(connect_msg->tunnel_id);
1710 t = retrieve_tunnel_by_local_id(c, tid);
1713 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1717 /* Does client own tunnel? */
1718 if (t->client->handle != client) {
1720 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1724 /* Ok, lets find a peer offering the service */
1725 application = ntohl(connect_msg->type);
1726 application++; // FIXME silence warnings
1728 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1734 * Handler for client traffic directed to one peer
1736 * @param cls closure
1737 * @param client identification of the client
1738 * @param message the actual message
1741 handle_local_network_traffic (void *cls,
1742 struct GNUNET_SERVER_Client *client,
1743 const struct GNUNET_MessageHeader *message)
1745 struct MeshClient *c;
1746 struct MeshTunnel *t;
1747 struct MeshPeerInfo *pi;
1748 struct GNUNET_MESH_Data *data_msg;
1749 struct GNUNET_PeerIdentity next_hop;
1750 MESH_TunnelNumber tid;
1752 /* Sanity check for client registration */
1753 if (NULL == (c = retrieve_client(client))) {
1755 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1758 data_msg = (struct GNUNET_MESH_Data *)message;
1759 /* Sanity check for message size */
1760 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1761 ntohs(data_msg->header.size))
1764 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1768 /* Tunnel exists? */
1769 tid = ntohl(data_msg->tunnel_id);
1770 t = retrieve_tunnel_by_local_id(c, tid);
1773 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1777 /* Is it a local tunnel? Then, does client own the tunnel? */
1778 if (t->client->handle != NULL && t->client->handle != client) {
1780 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1784 pi = GNUNET_CONTAINER_multihashmap_get(t->peers,
1785 &data_msg->peer_id.hashPubKey);
1786 /* Is the selected peer in the tunnel? */
1789 * Are we SO nice that we automatically try to add him to the tunnel?
1792 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1795 GNUNET_PEER_resolve(get_first_hop(pi->path), &next_hop);
1796 GNUNET_CORE_notify_transmit_ready(core_handle,
1799 GNUNET_TIME_UNIT_FOREVER_REL,
1801 /* FIXME re-check types */
1802 message->size - sizeof(struct GNUNET_MESH_Data)
1803 + sizeof(struct GNUNET_MESH_DataMessageFromOrigin),
1804 &send_core_data_to_origin, /* FIXME re-check */
1807 GNUNET_SERVER_receive_done(client, GNUNET_OK); /* FIXME not yet */
1812 * Handler for client traffic directed to all peers in a tunnel
1814 * @param cls closure
1815 * @param client identification of the client
1816 * @param message the actual message
1819 handle_local_network_traffic_bcast (void *cls,
1820 struct GNUNET_SERVER_Client *client,
1821 const struct GNUNET_MessageHeader *message)
1823 struct MeshClient *c;
1824 struct MeshTunnel *t;
1825 struct GNUNET_MESH_DataBroadcast *data_msg;
1826 MESH_TunnelNumber tid;
1828 /* Sanity check for client registration */
1829 if (NULL == (c = retrieve_client(client))) {
1831 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1834 data_msg = (struct GNUNET_MESH_DataBroadcast *)message;
1835 /* Sanity check for message size */
1836 if (sizeof(struct GNUNET_MESH_PeerControl)
1837 != ntohs(data_msg->header.size))
1840 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1844 /* Tunnel exists? */
1845 tid = ntohl(data_msg->tunnel_id);
1846 t = retrieve_tunnel_by_local_id(c, tid);
1849 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1853 /* Does client own tunnel? */
1854 if (t->client->handle != client) {
1856 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1862 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1867 * Functions to handle messages from clients
1869 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1870 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
1871 {&handle_local_tunnel_create, NULL,
1872 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
1873 sizeof(struct GNUNET_MESH_TunnelMessage)},
1874 {&handle_local_tunnel_destroy, NULL,
1875 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
1876 sizeof(struct GNUNET_MESH_TunnelMessage)},
1877 {&handle_local_connect_add, NULL,
1878 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD,
1879 sizeof(struct GNUNET_MESH_PeerControl)},
1880 {&handle_local_connect_del, NULL,
1881 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL,
1882 sizeof(struct GNUNET_MESH_PeerControl)},
1883 {&handle_local_connect_by_type, NULL,
1884 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE,
1885 sizeof(struct GNUNET_MESH_ConnectPeerByType)},
1886 {&handle_local_network_traffic, NULL,
1887 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
1888 {&handle_local_network_traffic_bcast, NULL,
1889 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0},
1895 * To be called on core init/fail.
1897 * @param cls service closure
1898 * @param server handle to the server for this service
1899 * @param identity the public identity of this peer
1900 * @param publicKey the public key of this peer
1903 core_init (void *cls,
1904 struct GNUNET_CORE_Handle *server,
1905 const struct GNUNET_PeerIdentity *identity,
1906 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
1908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1910 core_handle = server;
1911 myid = GNUNET_PEER_intern(identity);
1916 * Method called whenever a given peer connects.
1918 * @param cls closure
1919 * @param peer peer identity this notification is about
1920 * @param atsi performance data for the connection
1923 core_connect (void *cls,
1924 const struct GNUNET_PeerIdentity *peer,
1925 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1927 // GNUNET_PEER_Id pid;
1928 struct MeshPeerInfo *peer_info;
1929 struct MeshPath *path;
1931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1932 "Peer connected\n");
1933 peer_info = get_peer_info(peer);
1934 if (myid == peer_info->id) {
1935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1938 path = GNUNET_malloc(sizeof(struct MeshPath));
1940 path->peers = GNUNET_malloc(sizeof(GNUNET_PEER_Id) * 2);
1941 path->peers[0] = myid;
1942 path->peers[1] = peer_info->id;
1943 add_path_to_peer(peer_info, path);
1948 * Method called whenever a peer disconnects.
1950 * @param cls closure
1951 * @param peer peer identity this notification is about
1954 core_disconnect (void *cls,
1956 GNUNET_PeerIdentity *peer)
1959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1960 "Peer disconnected\n");
1961 pid = GNUNET_PEER_search(peer);
1963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1970 /******************************************************************************/
1971 /************************ MAIN FUNCTIONS ****************************/
1972 /******************************************************************************/
1975 * Task run during shutdown.
1981 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1985 if (core_handle != NULL) {
1986 GNUNET_CORE_disconnect (core_handle);
1989 if (dht_handle != NULL) {
1990 GNUNET_DHT_disconnect (dht_handle);
1993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1998 * Process mesh requests.
2000 * @param cls closure
2001 * @param server the initialized server
2002 * @param c configuration to use
2006 struct GNUNET_SERVER_Handle *server,
2007 const struct GNUNET_CONFIGURATION_Handle *c)
2009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2010 "starting to run\n");
2011 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2012 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2013 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2015 NULL, /* Closure passed to MESH functions */
2016 &core_init, /* Call core_init once connected */
2017 &core_connect, /* Handle connects */
2018 &core_disconnect, /* remove peers on disconnects */
2019 NULL, /* Do we care about "status" updates? */
2020 NULL, /* Don't notify about all incoming messages */
2021 GNUNET_NO, /* For header only in notification */
2022 NULL, /* Don't notify about all outbound messages */
2023 GNUNET_NO, /* For header-only out notification */
2024 core_handlers); /* Register these handlers */
2025 if (core_handle == NULL) {
2028 dht_handle = GNUNET_DHT_connect(c, 64);
2029 if (dht_handle == NULL) {
2034 tunnels = GNUNET_CONTAINER_multihashmap_create(32);
2035 peers = GNUNET_CONTAINER_multihashmap_create(32);
2037 clients_tail = NULL;
2039 /* Scheduled the task to clean up when shutdown is called */
2040 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2041 &shutdown_task, NULL);
2043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2048 * The main function for the mesh service.
2050 * @param argc number of arguments from the command line
2051 * @param argv command line arguments
2052 * @return 0 ok, 1 on error
2055 main (int argc, char *const *argv)
2060 GNUNET_SERVICE_run (argc,
2063 GNUNET_SERVICE_OPTION_NONE,
2064 &run, NULL)) ? 0 : 1;
2065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,