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 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
318 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
320 static 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_raw (void *cls, size_t size, void *buf)
779 struct GNUNET_MessageHeader *msg = cls;
782 GNUNET_assert(NULL != msg);
783 total_size = ntohs(msg->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_multicast (void *cls, size_t size, void *buf)
810 struct GNUNET_MESH_DataMessageFromOrigin *msg = cls;
813 GNUNET_assert(NULL != msg);
814 total_size = ntohs(msg->header.size);
816 if (total_size > size) {
817 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
818 "not enough buffer to send data futher\n");
821 memcpy(msg, buf, total_size);
827 * Function called to notify a client about the socket
828 * being ready to queue more data. "buf" will be
829 * NULL and "size" zero if the socket was closed for
830 * writing in the meantime.
832 * @param cls closure (data itself)
833 * @param size number of bytes available in buf
834 * @param buf where the callee should write the message
835 * @return number of bytes written to buf
838 send_core_data_to_peer (void *cls, size_t size, void *buf)
840 struct info_for_data_to_origin *info = cls;
841 struct GNUNET_MESH_DataMessageToOrigin *msg = buf;
844 GNUNET_assert(NULL != info);
845 total_size = sizeof(struct GNUNET_MESH_DataMessageToOrigin) + info->size;
846 /* FIXME better constant? short >= 16 bits, not == 16 bits... */
847 GNUNET_assert(total_size < USHRT_MAX);
849 if (total_size > size) {
850 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
851 "not enough buffer to send data to origin\n");
854 msg->header.size = htons(total_size);
855 msg->header.type = htons(GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
856 GNUNET_PEER_resolve(info->origin->oid, &msg->oid);
857 msg->tid = htonl(info->origin->tid);
858 if (0 != info->size && NULL != info->data) {
859 memcpy(&msg[1], info->data, info->size);
867 * Send another peer a notification to destroy a tunnel
868 * @param cls The tunnel to destroy
869 * @param size Size in the buffer
870 * @param buf Memory where to put the data to transmit
871 * @return Size of data put in buffer
874 send_p2p_tunnel_destroy(void *cls, size_t size, void *buf)
876 struct MeshTunnel *t = cls;
877 struct MeshClient *c;
878 struct GNUNET_MESH_TunnelMessage *msg;
882 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY); /*FIXME*/
883 msg->header.size = htons(sizeof(struct GNUNET_MESH_TunnelMessage));
884 msg->tunnel_id = htonl(t->id.tid);
886 destroy_tunnel(c, t);
887 return sizeof(struct GNUNET_MESH_TunnelMessage);
892 * Iterator over hash map peer entries to resend a data packet to all peers
895 * @param cls closure (original message)
896 * @param key current key code (peer id hash)
897 * @param value value in the hash map (peer_info)
898 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
900 static int iterate_resend_multicast (void *cls,
901 const GNUNET_HashCode * key,
904 struct GNUNET_MESH_DataMessageMulticast *msg = cls;
905 struct GNUNET_PeerIdentity id;
906 struct MeshPeerInfo *peer_info = value;
908 if (peer_info->id == myid) {
909 // TODO retransmit to interested clients
912 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
913 GNUNET_CORE_notify_transmit_ready(core_handle,
916 GNUNET_TIME_UNIT_FOREVER_REL,
918 ntohs(msg->header.size),
925 /******************************************************************************/
926 /******************** MESH NETWORK HANDLERS **************************/
927 /******************************************************************************/
931 * Core handler for path creation
932 * struct GNUNET_CORE_MessageHandler
935 * @param message message
936 * @param peer peer identity this notification is about
937 * @param atsi performance data
938 * @return GNUNET_OK to keep the connection open,
939 * GNUNET_SYSERR to close it (signal serious error)
943 handle_mesh_path_create (void *cls,
944 const struct GNUNET_PeerIdentity *peer,
945 const struct GNUNET_MessageHeader *message,
946 const struct GNUNET_TRANSPORT_ATS_Information
949 unsigned int own_pos;
952 MESH_TunnelNumber tid;
953 struct GNUNET_MESH_ManipulatePath *msg;
954 struct GNUNET_PeerIdentity *pi;
955 struct GNUNET_PeerIdentity id;
956 GNUNET_HashCode hash;
957 struct MeshPath *path;
958 struct MeshPeerInfo *dest_peer_info;
959 struct MeshPeerInfo *orig_peer_info;
960 struct MeshTunnel *t;
963 size = ntohs(message->size);
964 if (size < sizeof(struct GNUNET_MESH_ManipulatePath)) {
965 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
966 "received create path message too short\n");
970 size -= sizeof(struct GNUNET_MESH_ManipulatePath);
971 if (size < 2 * sizeof(struct GNUNET_PeerIdentity)) {
972 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
973 "create path message lacks enough peers\n");
976 if (size % sizeof(struct GNUNET_PeerIdentity)) {
977 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
978 "create path message of wrong size\n");
981 msg = (struct GNUNET_MESH_ManipulatePath *) message;
982 size /= sizeof(struct GNUNET_PeerIdentity);
984 tid = ntohl(msg->tid);
985 pi = (struct GNUNET_PeerIdentity *) &msg[1];
986 t = retrieve_tunnel(pi, tid);
989 t = GNUNET_malloc(sizeof(struct MeshTunnel));
990 t->id.oid = GNUNET_PEER_intern(pi);
994 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
996 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
998 GNUNET_CONTAINER_multihashmap_put(tunnels,
1001 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1003 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1004 "create path: could not store tunnel in hashmap\n");
1009 dest_peer_info = GNUNET_CONTAINER_multihashmap_get(peers,
1010 &pi[size - 1].hashPubKey);
1011 if (NULL == dest_peer_info) {
1012 dest_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
1013 dest_peer_info->id = GNUNET_PEER_intern(&pi[size - 1]);
1014 dest_peer_info->state = MESH_PEER_WAITING;
1015 GNUNET_CONTAINER_multihashmap_put(peers,
1016 &pi[size - 1].hashPubKey,
1018 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1020 orig_peer_info = GNUNET_CONTAINER_multihashmap_get(peers, &pi->hashPubKey);
1021 if (NULL == orig_peer_info) {
1022 orig_peer_info = GNUNET_malloc(sizeof(struct MeshPeerInfo));
1023 orig_peer_info->id = GNUNET_PEER_intern(pi);
1024 orig_peer_info->state = MESH_PEER_WAITING;
1025 GNUNET_CONTAINER_multihashmap_put(peers,
1028 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1032 path = GNUNET_malloc(sizeof(struct MeshPath));
1033 path->length = size;
1034 path->peers = GNUNET_malloc(size * sizeof(GNUNET_PEER_Id));
1036 for (i = 0; i < size; i++) {
1037 path->peers[i] = GNUNET_PEER_intern(&pi[i]);
1038 if (path->peers[i] == myid) own_pos = i;
1040 if (own_pos == 0) { /* cannot be self, must be 'not found' */
1041 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1042 "create path: self not found in path through self\n");
1044 /* FIXME error. destroy tunnel? leave for timeout? */
1047 if (own_pos == size - 1) { /* it is for us! */
1048 add_path_to_origin(orig_peer_info, path); /* inverts path! */
1049 GNUNET_PEER_resolve(get_first_hop(path), &id); /* path is inverted :) */
1051 * is it allowed/desired to declare variables this way?
1052 * (style, best practices, etc)
1053 * This variable is short lived and completely irrelevant for the rest
1056 struct info_for_data_to_origin *info =
1057 GNUNET_malloc(sizeof(struct info_for_data_to_origin));
1058 info->origin = &t->id;
1061 GNUNET_CORE_notify_transmit_ready(core_handle,
1064 GNUNET_TIME_UNIT_FOREVER_REL,
1066 sizeof(struct GNUNET_MessageHeader),
1067 &send_core_data_to_origin,
1070 add_path_to_peer(dest_peer_info, path);
1071 GNUNET_PEER_resolve(get_first_hop(path), &id);
1072 GNUNET_CORE_notify_transmit_ready(core_handle,
1075 GNUNET_TIME_UNIT_FOREVER_REL,
1077 sizeof(struct GNUNET_MessageHeader),
1078 &send_core_create_path_for_peer,
1086 * Core handler for mesh network traffic going from the origin to a peer
1088 * @param cls closure
1089 * @param message message
1090 * @param peer peer identity this notification is about
1091 * @param atsi performance data
1092 * @return GNUNET_OK to keep the connection open,
1093 * GNUNET_SYSERR to close it (signal serious error)
1096 handle_mesh_data_unicast (void *cls,
1097 const struct GNUNET_PeerIdentity *peer,
1098 const struct GNUNET_MessageHeader *message,
1099 const struct GNUNET_TRANSPORT_ATS_Information
1102 struct GNUNET_MESH_DataMessageFromOrigin *msg;
1103 struct GNUNET_PeerIdentity id;
1104 struct MeshTunnel *t;
1105 struct MeshPeerInfo *pi;
1108 size = ntohs(message->size);
1109 if (size < sizeof(struct GNUNET_MESH_DataMessageFromOrigin)) {
1110 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1111 "got data from origin packet: too short\n");
1112 return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
1114 msg = (struct GNUNET_MESH_DataMessageFromOrigin *) message;
1115 t = retrieve_tunnel(&msg->oid, ntohl(msg->tid));
1116 pi = GNUNET_CONTAINER_multihashmap_get(t->peers,
1117 &msg->destination.hashPubKey);
1119 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1120 "got invalid data from origin packet: wrong destination\n");
1121 /* TODO are we so nice to try to deliver it anyway? maybe we missed
1122 * a Create_Path packet that added the peer but we have it in the
1123 * _global_ peer pool anyway...
1127 GNUNET_PEER_resolve(get_first_hop(pi->path), &id);
1128 GNUNET_CORE_notify_transmit_ready(core_handle,
1131 GNUNET_TIME_UNIT_FOREVER_REL,
1134 &send_core_data_raw,
1141 * Core handler for mesh network traffic going from the origin to all peers
1143 * @param cls closure
1144 * @param message message
1145 * @param peer peer identity this notification is about
1146 * @param atsi performance data
1147 * @return GNUNET_OK to keep the connection open,
1148 * GNUNET_SYSERR to close it (signal serious error)
1151 handle_mesh_data_multicast (void *cls,
1152 const struct GNUNET_PeerIdentity *peer,
1153 const struct GNUNET_MessageHeader *message,
1154 const struct GNUNET_TRANSPORT_ATS_Information
1157 struct GNUNET_MESH_DataMessageMulticast *msg;
1158 struct MeshTunnel *t;
1161 size = ntohs(message->size);
1162 if (size < sizeof(struct GNUNET_MESH_DataMessageMulticast)) {
1163 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1164 "got multicast packet: too short\n");
1165 return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
1167 msg = (struct GNUNET_MESH_DataMessageMulticast *) message;
1168 t = retrieve_tunnel(&msg->oid, ntohl(msg->tid));
1170 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
1171 &iterate_resend_multicast,
1179 * Core handler for mesh network traffic
1181 * @param cls closure
1182 * @param message message
1183 * @param peer peer identity this notification is about
1184 * @param atsi performance data
1185 * @return GNUNET_OK to keep the connection open,
1186 * GNUNET_SYSERR to close it (signal serious error)
1189 handle_mesh_data_to_orig (void *cls,
1190 const struct GNUNET_PeerIdentity *peer,
1191 const struct GNUNET_MessageHeader *message,
1192 const struct GNUNET_TRANSPORT_ATS_Information
1195 struct GNUNET_MESH_DataMessageToOrigin *msg;
1196 struct GNUNET_PeerIdentity id;
1197 struct MeshTunnel *t;
1198 struct MeshPeerInfo *peer_info;
1201 size = ntohs(message->size);
1202 if (size < sizeof(struct GNUNET_MESH_DataMessageToOrigin)) {
1203 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1204 "got invalid data to origin packet: too short\n");
1205 return GNUNET_OK; // FIXME maybe SYSERR? peer misbehaving?
1207 msg = (struct GNUNET_MESH_DataMessageToOrigin *) message;
1208 t = retrieve_tunnel(&msg->oid, ntohl(msg->tid));
1210 if (NULL == t) { /* don't know tunnel */
1211 /* TODO: are we so nice that we try to send it to OID anyway? We *could*
1212 * know how to reach it, from the global peer hashmap
1217 if (t->id.oid == myid) {
1218 if (NULL == t->client) {
1219 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1220 "got data packet for ownerless tunnel\n");
1223 // TODO retransmit to client owner
1226 peer_info = get_peer_info(&msg->oid);
1227 if (NULL == peer_info) {
1228 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1229 "unknown origin of tunnel\n");
1232 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
1233 GNUNET_CORE_notify_transmit_ready(core_handle,
1236 GNUNET_TIME_UNIT_FOREVER_REL,
1239 &send_core_data_raw,
1247 * Functions to handle messages from core
1249 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1250 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1251 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN, 0},
1252 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_DATA_MULTICAST, 0},
1253 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN, 0},
1259 /******************************************************************************/
1260 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1261 /******************************************************************************/
1264 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1265 * client when the client disconnects.
1266 * @param cls closure (client that is disconnecting)
1267 * @param key the hash of the local tunnel id (used to access the hashmap)
1268 * @param value the value stored at the key (tunnel to destroy)
1269 * @return GNUNET_OK on success
1272 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value) {
1274 r = destroy_tunnel((struct MeshTunnel *) value);
1280 * notify_client_connection_failure: notify a client that the connection to the
1281 * requested remote peer is not possible (for instance, no route found)
1282 * Function called when the socket is ready to queue more data. "buf" will be
1283 * NULL and "size" zero if the socket was closed for writing in the meantime.
1285 * @param cls closure
1286 * @param size number of bytes available in buf
1287 * @param buf where the callee should write the message
1288 * @return number of bytes written to buf
1291 notify_client_connection_failure (void *cls, size_t size, void *buf)
1294 struct MeshPeerInfo *peer_info;
1295 struct GNUNET_MESH_PeerControl *msg;
1296 struct GNUNET_PeerIdentity id;
1298 if (0 == size && NULL == buf) {
1299 // TODO retry? cancel?
1303 size_needed = sizeof(struct GNUNET_MESH_PeerControl);
1304 peer_info = (struct MeshPeerInfo *) cls;
1305 msg = (struct GNUNET_MESH_PeerControl *) buf;
1306 msg->header.size = htons(sizeof(struct GNUNET_MESH_PeerControl));
1307 msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1308 // msg->tunnel_id = htonl(peer_info->t->tid);
1309 GNUNET_PEER_resolve(peer_info->id, &id);
1310 memcpy(&msg->peer, &id, sizeof(struct GNUNET_PeerIdentity));
1318 * Send keepalive packets for a peer
1324 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1326 struct MeshPeerInfo *peer_info = cls;
1327 struct GNUNET_PeerIdentity id;
1329 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN) return;
1330 GNUNET_PEER_resolve(get_first_hop(peer_info->path), &id);
1331 GNUNET_CORE_notify_transmit_ready(core_handle,
1334 GNUNET_TIME_UNIT_FOREVER_REL,
1336 sizeof(struct GNUNET_MESH_ManipulatePath)
1337 + (peer_info->path->length
1338 * sizeof (struct GNUNET_PeerIdentity)),
1339 &send_core_create_path_for_peer,
1347 * Function to process paths received for a new peer addition. The recorded
1348 * paths form the initial tunnel, which can be optimized later.
1349 * Called on each result obtained for the DHT search.
1351 * @param cls closure
1352 * @param exp when will this value expire
1353 * @param key key of the result
1354 * @param get_path NULL-terminated array of pointers
1355 * to the peers on reverse GET path (or NULL if not recorded)
1356 * @param put_path NULL-terminated array of pointers
1357 * to the peers on the PUT path (or NULL if not recorded)
1358 * @param type type of the result
1359 * @param size number of bytes in data
1360 * @param data pointer to the result data
1363 dht_get_response_handler(void *cls,
1364 struct GNUNET_TIME_Absolute exp,
1365 const GNUNET_HashCode * key,
1366 const struct GNUNET_PeerIdentity * const *get_path,
1367 const struct GNUNET_PeerIdentity * const *put_path,
1368 enum GNUNET_BLOCK_Type type,
1372 struct MeshPeerInfo *peer_info = cls;
1374 struct GNUNET_PeerIdentity pi;
1377 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path) {
1378 // Find ourselves some alternate initial path to the destination: retry
1379 GNUNET_DHT_get_stop(peer_info->dhtget);
1380 GNUNET_PEER_resolve(peer_info->id, &pi);
1381 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1382 GNUNET_TIME_UNIT_FOREVER_REL,
1383 GNUNET_BLOCK_TYPE_ANY,
1385 4, /* replication level */
1386 GNUNET_DHT_RO_RECORD_ROUTE,
1387 NULL, /* bloom filter */
1390 0, /* xquery bits */
1391 dht_get_response_handler,
1395 p = GNUNET_malloc(sizeof(struct MeshPath));
1396 for (i = 0; get_path[i] != NULL; i++);
1397 for (i--; i >= 0; i--) {
1398 p->peers = GNUNET_realloc(p->peers,
1399 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1400 p->peers[p->length] = GNUNET_PEER_intern(get_path[i]);
1403 for (i = 0; put_path[i] != NULL; i++);
1404 for (i--; i >= 0; i--) {
1405 p->peers = GNUNET_realloc(p->peers,
1406 sizeof(GNUNET_PEER_Id) * (p->length + 1));
1407 p->peers[p->length] = GNUNET_PEER_intern(put_path[i]);
1410 add_path_to_peer(peer_info, p);
1411 GNUNET_CORE_notify_transmit_ready(core_handle,
1414 GNUNET_TIME_UNIT_FOREVER_REL,
1416 sizeof(struct GNUNET_MESH_ManipulatePath)
1418 * sizeof (struct GNUNET_PeerIdentity)),
1419 &send_core_create_path_for_peer,
1421 GNUNET_SCHEDULER_add_delayed(REFRESH_PATH_TIME, &path_refresh, peer_info);
1426 /******************************************************************************/
1427 /********************* MESH LOCAL HANDLES **************************/
1428 /******************************************************************************/
1432 * Handler for client disconnection
1434 * @param cls closure
1435 * @param client identification of the client; NULL
1436 * for the last call when the server is destroyed
1439 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
1441 struct MeshClient *c;
1442 struct MeshClient *next;
1444 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1445 "client disconnected\n");
1448 if (c->handle == client) {
1449 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1450 " matching client found, cleaning\n");
1451 GNUNET_CONTAINER_multihashmap_iterate(c->tunnels,
1452 &delete_tunnel_entry,
1454 GNUNET_CONTAINER_multihashmap_destroy(c->tunnels);
1455 if(0 != c->app_counter) GNUNET_free (c->apps);
1456 if(0 != c->type_counter) GNUNET_free (c->types);
1457 GNUNET_CONTAINER_DLL_remove(clients, clients_tail, c);
1462 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1463 " ... searching\n");
1467 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1474 * Handler for new clients
1476 * @param cls closure
1477 * @param client identification of the client
1478 * @param message the actual message, which includes messages the client wants
1481 handle_local_new_client (void *cls,
1482 struct GNUNET_SERVER_Client *client,
1483 const struct GNUNET_MessageHeader *message)
1485 struct GNUNET_MESH_ClientConnect *cc_msg;
1486 struct MeshClient *c;
1491 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
1492 /* Check data sanity */
1493 size = ntohs(message->size) - sizeof(struct GNUNET_MESH_ClientConnect);
1494 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
1495 types = ntohs(cc_msg->types);
1496 apps = ntohs(cc_msg->applications);
1498 types * sizeof(uint16_t) + apps * sizeof(GNUNET_MESH_ApplicationType))
1501 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1505 /* Create new client structure */
1506 c = GNUNET_malloc(sizeof(struct MeshClient));
1509 c->type_counter = types;
1510 c->types = GNUNET_malloc(types * sizeof(uint16_t));
1511 memcpy(c->types, &message[1], types * sizeof(uint16_t));
1514 c->app_counter = apps;
1515 c->apps = GNUNET_malloc(apps * sizeof(GNUNET_MESH_ApplicationType));
1517 &message[1] + types * sizeof(uint16_t),
1518 apps * sizeof(GNUNET_MESH_ApplicationType));
1520 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1521 " client has %u+%u subscriptions\n",
1525 GNUNET_CONTAINER_DLL_insert(clients, clients_tail, c);
1526 c->tunnels = GNUNET_CONTAINER_multihashmap_create(32);
1528 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1534 * Handler for requests of new tunnels
1536 * @param cls closure
1537 * @param client identification of the client
1538 * @param message the actual message
1541 handle_local_tunnel_create (void *cls,
1542 struct GNUNET_SERVER_Client *client,
1543 const struct GNUNET_MessageHeader *message)
1545 struct GNUNET_MESH_TunnelMessage *t_msg;
1546 struct MeshTunnel *t;
1547 struct MeshClient *c;
1548 GNUNET_HashCode hash;
1550 /* Sanity check for client registration */
1551 if (NULL == (c = retrieve_client(client))) {
1553 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1557 /* Message sanity check */
1558 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1560 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1564 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1565 /* Sanity check for tunnel numbering */
1566 if (0 == (ntohl(t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_MARK)) {
1568 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1571 /* Sanity check for duplicate tunnel IDs */
1572 if(NULL != retrieve_tunnel_by_local_id(c, ntohl(t_msg->tunnel_id))) {
1574 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1578 t = GNUNET_malloc(sizeof(struct MeshTunnel));
1579 while (NULL != retrieve_tunnel_by_pi(myid, next_tid))
1580 next_tid = (next_tid + 1) % GNUNET_MESH_LOCAL_TUNNEL_ID_MARK;
1581 t->id.tid = next_tid++;
1583 t->local_tid = ntohl(t_msg->tunnel_id);
1585 t->peers = GNUNET_CONTAINER_multihashmap_create(32);
1587 GNUNET_CRYPTO_hash(&t->local_tid, sizeof(MESH_TunnelNumber), &hash);
1589 GNUNET_CONTAINER_multihashmap_put(c->tunnels, &hash, t,
1590 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1593 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1597 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1599 GNUNET_CONTAINER_multihashmap_put(tunnels, &hash, t,
1600 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1603 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1607 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1613 * Handler for requests of deleting tunnels
1615 * @param cls closure
1616 * @param client identification of the client
1617 * @param message the actual message
1620 handle_local_tunnel_destroy (void *cls,
1621 struct GNUNET_SERVER_Client *client,
1622 const struct GNUNET_MessageHeader *message)
1624 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
1625 struct MeshClient *c;
1626 struct MeshTunnel *t;
1627 MESH_TunnelNumber tid;
1628 GNUNET_HashCode hash;
1631 /* Sanity check for client registration */
1632 if (NULL == (c = retrieve_client(client))) {
1634 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1637 /* Message sanity check */
1638 if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
1640 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1644 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
1646 /* Retrieve tunnel */
1647 tid = ntohl(tunnel_msg->tunnel_id);
1649 /* Remove from local id hashmap */
1650 GNUNET_CRYPTO_hash(&tid, sizeof(MESH_TunnelNumber), &hash);
1651 t = GNUNET_CONTAINER_multihashmap_get(c->tunnels, &hash);
1652 GNUNET_CONTAINER_multihashmap_remove(c->tunnels, &hash, t);
1654 /* Remove from global id hashmap */
1655 GNUNET_CRYPTO_hash(&t->id, sizeof(struct MESH_TunnelID), &hash);
1656 GNUNET_CONTAINER_multihashmap_remove(tunnels, &hash, t);
1658 // notify_tunnel_destroy(t);
1659 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1665 * Handler for connection requests to new peers
1667 * @param cls closure
1668 * @param client identification of the client
1669 * @param message the actual message (PeerControl)
1672 handle_local_connect_add (void *cls,
1673 struct GNUNET_SERVER_Client *client,
1674 const struct GNUNET_MessageHeader *message)
1676 struct GNUNET_MESH_PeerControl *peer_msg;
1677 struct MeshClient *c;
1678 struct MeshTunnel *t;
1679 MESH_TunnelNumber tid;
1680 struct MeshPeerInfo *peer_info;
1683 /* Sanity check for client registration */
1684 if (NULL == (c = retrieve_client(client))) {
1686 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1690 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1691 /* Sanity check for message size */
1692 if (sizeof(struct GNUNET_MESH_PeerControl)
1693 != ntohs(peer_msg->header.size))
1696 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1700 /* Tunnel exists? */
1701 tid = ntohl(peer_msg->tunnel_id);
1702 t = retrieve_tunnel_by_local_id(c, tid);
1705 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1709 /* Does client own tunnel? */
1710 if (t->client->handle != client) {
1712 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1717 peer_info = get_peer_info(&peer_msg->peer);
1719 /* Start DHT search if needed */
1720 if(MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget) {
1721 peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
1722 GNUNET_TIME_UNIT_FOREVER_REL,
1723 GNUNET_BLOCK_TYPE_ANY,
1724 &peer_msg->peer.hashPubKey,
1725 4, /* replication level */
1726 GNUNET_DHT_RO_RECORD_ROUTE,
1727 NULL, /* bloom filter */
1730 0, /* xquery bits */
1731 dht_get_response_handler,
1735 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1741 * Handler for disconnection requests of peers in a tunnel
1743 * @param cls closure
1744 * @param client identification of the client
1745 * @param message the actual message (PeerControl)
1748 handle_local_connect_del (void *cls,
1749 struct GNUNET_SERVER_Client *client,
1750 const struct GNUNET_MessageHeader *message)
1752 struct GNUNET_MESH_PeerControl *peer_msg;
1753 struct MeshClient *c;
1754 struct MeshTunnel *t;
1755 MESH_TunnelNumber tid;
1757 /* Sanity check for client registration */
1758 if (NULL == (c = retrieve_client(client))) {
1760 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1763 peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1764 /* Sanity check for message size */
1765 if (sizeof(struct GNUNET_MESH_PeerControl)
1766 != ntohs(peer_msg->header.size))
1769 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1773 /* Tunnel exists? */
1774 tid = ntohl(peer_msg->tunnel_id);
1775 t = retrieve_tunnel_by_local_id(c, tid);
1778 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1782 /* Does client own tunnel? */
1783 if (t->client->handle != client) {
1785 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1789 /* Ok, delete peer from tunnel */
1790 GNUNET_CONTAINER_multihashmap_remove_all(t->peers,
1791 &peer_msg->peer.hashPubKey);
1793 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1799 * Handler for connection requests to new peers by type
1801 * @param cls closure
1802 * @param client identification of the client
1803 * @param message the actual message (ConnectPeerByType)
1806 handle_local_connect_by_type (void *cls,
1807 struct GNUNET_SERVER_Client *client,
1808 const struct GNUNET_MessageHeader *message)
1810 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
1811 MESH_TunnelNumber tid;
1812 GNUNET_MESH_ApplicationType application;
1813 struct MeshClient *c;
1814 struct MeshTunnel *t;
1816 /* Sanity check for client registration */
1817 if (NULL == (c = retrieve_client(client))) {
1819 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1823 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *)message;
1824 /* Sanity check for message size */
1825 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1826 ntohs(connect_msg->header.size))
1829 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1833 /* Tunnel exists? */
1834 tid = ntohl(connect_msg->tunnel_id);
1835 t = retrieve_tunnel_by_local_id(c, tid);
1838 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1842 /* Does client own tunnel? */
1843 if (t->client->handle != client) {
1845 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1849 /* Ok, lets find a peer offering the service */
1850 application = ntohl(connect_msg->type);
1851 application++; // FIXME silence warnings
1853 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1859 * Handler for client traffic directed to one peer
1861 * @param cls closure
1862 * @param client identification of the client
1863 * @param message the actual message
1866 handle_local_network_traffic (void *cls,
1867 struct GNUNET_SERVER_Client *client,
1868 const struct GNUNET_MessageHeader *message)
1870 struct MeshClient *c;
1871 struct MeshTunnel *t;
1872 struct MeshPeerInfo *pi;
1873 struct GNUNET_MESH_Data *data_msg;
1874 struct GNUNET_PeerIdentity next_hop;
1875 MESH_TunnelNumber tid;
1877 /* Sanity check for client registration */
1878 if (NULL == (c = retrieve_client(client))) {
1880 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1883 data_msg = (struct GNUNET_MESH_Data *)message;
1884 /* Sanity check for message size */
1885 if (sizeof(struct GNUNET_MESH_PeerControl) !=
1886 ntohs(data_msg->header.size))
1889 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1893 /* Tunnel exists? */
1894 tid = ntohl(data_msg->tunnel_id);
1895 t = retrieve_tunnel_by_local_id(c, tid);
1898 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1902 /* Is it a local tunnel? Then, does client own the tunnel? */
1903 if (t->client->handle != NULL && t->client->handle != client) {
1905 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1909 pi = GNUNET_CONTAINER_multihashmap_get(t->peers,
1910 &data_msg->peer_id.hashPubKey);
1911 /* Is the selected peer in the tunnel? */
1914 * Are we SO nice that we automatically try to add him to the tunnel?
1917 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1920 GNUNET_PEER_resolve(get_first_hop(pi->path), &next_hop);
1921 GNUNET_CORE_notify_transmit_ready(core_handle,
1924 GNUNET_TIME_UNIT_FOREVER_REL,
1926 /* FIXME re-check types */
1927 message->size - sizeof(struct GNUNET_MESH_Data)
1928 + sizeof(struct GNUNET_MESH_DataMessageFromOrigin),
1929 &send_core_data_to_origin, /* FIXME re-check */
1932 GNUNET_SERVER_receive_done(client, GNUNET_OK); /* FIXME not yet */
1937 * Handler for client traffic directed to all peers in a tunnel
1939 * @param cls closure
1940 * @param client identification of the client
1941 * @param message the actual message
1944 handle_local_network_traffic_bcast (void *cls,
1945 struct GNUNET_SERVER_Client *client,
1946 const struct GNUNET_MessageHeader *message)
1948 struct MeshClient *c;
1949 struct MeshTunnel *t;
1950 struct GNUNET_MESH_DataBroadcast *data_msg;
1951 MESH_TunnelNumber tid;
1953 /* Sanity check for client registration */
1954 if (NULL == (c = retrieve_client(client))) {
1956 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1959 data_msg = (struct GNUNET_MESH_DataBroadcast *)message;
1960 /* Sanity check for message size */
1961 if (sizeof(struct GNUNET_MESH_PeerControl)
1962 != ntohs(data_msg->header.size))
1965 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1969 /* Tunnel exists? */
1970 tid = ntohl(data_msg->tunnel_id);
1971 t = retrieve_tunnel_by_local_id(c, tid);
1974 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1978 /* Does client own tunnel? */
1979 if (t->client->handle != client) {
1981 GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1987 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1992 * Functions to handle messages from clients
1994 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1995 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
1996 {&handle_local_tunnel_create, NULL,
1997 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
1998 sizeof(struct GNUNET_MESH_TunnelMessage)},
1999 {&handle_local_tunnel_destroy, NULL,
2000 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2001 sizeof(struct GNUNET_MESH_TunnelMessage)},
2002 {&handle_local_connect_add, NULL,
2003 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD,
2004 sizeof(struct GNUNET_MESH_PeerControl)},
2005 {&handle_local_connect_del, NULL,
2006 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL,
2007 sizeof(struct GNUNET_MESH_PeerControl)},
2008 {&handle_local_connect_by_type, NULL,
2009 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE,
2010 sizeof(struct GNUNET_MESH_ConnectPeerByType)},
2011 {&handle_local_network_traffic, NULL,
2012 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
2013 {&handle_local_network_traffic_bcast, NULL,
2014 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0},
2020 * To be called on core init/fail.
2022 * @param cls service closure
2023 * @param server handle to the server for this service
2024 * @param identity the public identity of this peer
2025 * @param publicKey the public key of this peer
2028 core_init (void *cls,
2029 struct GNUNET_CORE_Handle *server,
2030 const struct GNUNET_PeerIdentity *identity,
2031 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2035 core_handle = server;
2036 myid = GNUNET_PEER_intern(identity);
2041 * Method called whenever a given peer connects.
2043 * @param cls closure
2044 * @param peer peer identity this notification is about
2045 * @param atsi performance data for the connection
2048 core_connect (void *cls,
2049 const struct GNUNET_PeerIdentity *peer,
2050 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2052 // GNUNET_PEER_Id pid;
2053 struct MeshPeerInfo *peer_info;
2054 struct MeshPath *path;
2056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2057 "Peer connected\n");
2058 peer_info = get_peer_info(peer);
2059 if (myid == peer_info->id) {
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2063 path = GNUNET_malloc(sizeof(struct MeshPath));
2065 path->peers = GNUNET_malloc(sizeof(GNUNET_PEER_Id) * 2);
2066 path->peers[0] = myid;
2067 path->peers[1] = peer_info->id;
2068 add_path_to_peer(peer_info, path);
2073 * Method called whenever a peer disconnects.
2075 * @param cls closure
2076 * @param peer peer identity this notification is about
2079 core_disconnect (void *cls,
2081 GNUNET_PeerIdentity *peer)
2084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2085 "Peer disconnected\n");
2086 pid = GNUNET_PEER_search(peer);
2088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2095 /******************************************************************************/
2096 /************************ MAIN FUNCTIONS ****************************/
2097 /******************************************************************************/
2100 * Task run during shutdown.
2106 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2110 if (core_handle != NULL) {
2111 GNUNET_CORE_disconnect (core_handle);
2114 if (dht_handle != NULL) {
2115 GNUNET_DHT_disconnect (dht_handle);
2118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2123 * Process mesh requests.
2125 * @param cls closure
2126 * @param server the initialized server
2127 * @param c configuration to use
2131 struct GNUNET_SERVER_Handle *server,
2132 const struct GNUNET_CONFIGURATION_Handle *c)
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2135 "starting to run\n");
2136 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2137 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2138 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2140 NULL, /* Closure passed to MESH functions */
2141 &core_init, /* Call core_init once connected */
2142 &core_connect, /* Handle connects */
2143 &core_disconnect, /* remove peers on disconnects */
2144 NULL, /* Do we care about "status" updates? */
2145 NULL, /* Don't notify about all incoming messages */
2146 GNUNET_NO, /* For header only in notification */
2147 NULL, /* Don't notify about all outbound messages */
2148 GNUNET_NO, /* For header-only out notification */
2149 core_handlers); /* Register these handlers */
2150 if (core_handle == NULL) {
2153 dht_handle = GNUNET_DHT_connect(c, 64);
2154 if (dht_handle == NULL) {
2159 tunnels = GNUNET_CONTAINER_multihashmap_create(32);
2160 peers = GNUNET_CONTAINER_multihashmap_create(32);
2162 clients_tail = NULL;
2164 /* Scheduled the task to clean up when shutdown is called */
2165 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2166 &shutdown_task, NULL);
2168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2173 * The main function for the mesh service.
2175 * @param argc number of arguments from the command line
2176 * @param argv command line arguments
2177 * @return 0 ok, 1 on error
2180 main (int argc, char *const *argv)
2185 GNUNET_SERVICE_run (argc,
2188 GNUNET_SERVICE_OPTION_NONE,
2189 &run, NULL)) ? 0 : 1;
2190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,