src/mesh/gnunet-service-mesh.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
   4
   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.
   9
  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.
  14
  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.
  19 */
  20
  21 /**
  22  * @file mesh/gnunet-service-mesh.c
  23  * @brief GNUnet MESH service
  24  * @author Bartlomiej Polot
  25  *
  26  * STRUCTURE:
  27  * - DATA STRUCTURES
  28  * - GLOBAL VARIABLES
  29  * - MESH NETWORK HANDLES
  30  * - MESH LOCAL HANDLES
  31  * - MAIN FUNCTIONS (main & run)
  32  *
  33  * TODO:
  34  * - soft stateing (keep-alive (CHANGE?) / timeout / disconnect) -- not a message issue
  35  * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
  36  * - partial disconnect reporting -- same as error reporting?
  37  * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
  38  * - speed requirement specification (change?) in mesh API -- API call
  39  */
  40
  41 #include "platform.h"
  42 #include "gnunet_common.h"
  43 #include "gnunet_util_lib.h"
  44 #include "gnunet_peer_lib.h"
  45 #include "gnunet_core_service.h"
  46 #include "gnunet_protocols.h"
  47
  48 #include "mesh.h"
  49 #include "mesh_protocol.h"
  50 #include "gnunet_dht_service.h"
  51
  52
  53 /******************************************************************************/
  54 /************************      DATA STRUCTURES     ****************************/
  55 /******************************************************************************/
  56
  57 /**
  58  * All the states a peer participating in a tunnel can be in.
  59  */
  60 enum MeshPeerState
  61 {
  62     /**
  63      * Path to the peer not known yet
  64      */
  65     MESH_PEER_SEARCHING,
  66
  67     /**
  68      * Request sent, not yet answered.
  69      */
  70     MESH_PEER_WAITING,
  71
  72     /**
  73      * Peer connected and ready to accept data
  74      */
  75     MESH_PEER_READY,
  76
  77     /**
  78      * Peer connected previosly but not responding
  79      */
  80     MESH_PEER_RECONNECTING
  81 };
  82
  83 /**
  84  * Struct containing all information regarding a given peer
  85  */
  86 struct MeshPeerInfo
  87 {
  88     /**
  89      * Double linked list
  90      */
  91     struct MeshPeerInfo         *next;
  92     struct MeshPeerInfo         *prev;
  93
  94     /**
  95      * ID of the peer
  96      */
  97     GNUNET_PEER_Id              id;
  98
  99     /**
 100      * Tunnel this peer belongs to
 101      */
 102     struct MeshTunnel           *t;
 103
 104     /**
 105      * Is the peer reachable? Is the peer even connected?
 106      */
 107     enum MeshPeerState          state;
 108
 109     /**
 110      * When to try to establish contact again?
 111      */
 112     struct GNUNET_TIME_Absolute next_reconnect_attempt;
 113
 114     /**
 115      * Who to send the data to --- FIXME what about multiple (alternate) paths?
 116      */
 117     GNUNET_PEER_Id              first_hop;
 118
 119     /**
 120      * Max data rate to this peer
 121      */
 122     uint32_t                    max_speed;
 123
 124     /**
 125      * Handle to stop the DHT search for a path to this peer
 126      */
 127     struct GNUNET_DHT_GetHandle        *dhtget;
 128 };
 129
 130
 131 typedef uint32_t MESH_PathID;
 132
 133
 134 /**
 135  * Information regarding a path
 136  */
 137 struct MeshPath
 138 {
 139     /**
 140      * Double linked list
 141      */
 142     struct MeshPath             *next;
 143     struct MeshPath             *prev;
 144
 145     /**
 146      * Id of the path, in case it's needed
 147      */
 148     MESH_PathID                 id;
 149
 150     /**
 151      * Whether the path is serving traffic in a tunnel or is a backup
 152      */
 153     int                         in_use;
 154
 155     /**
 156      * List of all the peers that form the path from origin to target
 157      */
 158     GNUNET_PEER_Id              *peers;
 159     int                         length;
 160 };
 161
 162 /**
 163  * Data scheduled to transmit (to local client or remote peer)
 164  */
 165 struct MeshQueue
 166 {
 167     /**
 168      * Double linked list
 169      */
 170     struct MeshQueue            *next;
 171     struct MeshQueue            *prev;
 172
 173     /**
 174      * Size of the message to transmit
 175      */
 176     unsigned int                size;
 177
 178     /**
 179      * How old is the data?
 180      */
 181     struct GNUNET_TIME_Absolute timestamp;
 182
 183     /**
 184      * Data itself
 185      */
 186     struct GNUNET_MessageHeader *data;
 187 };
 188
 189
 190 struct MeshClient; /* FWD declaration */
 191 /**
 192  * Struct containing all information regarding a tunnel
 193  * For an intermediate node the improtant info used will be:
 194  * - OID        \ To identify
 195  * - TID        / the tunnel
 196  * - paths[0]   | To know where to send it next
 197  * - metainfo: ready, speeds, accounting
 198  * For an end node more fields will be needed (client-handling)
 199  */
 200 struct MeshTunnel
 201 {
 202
 203     /**
 204      * Double linked list
 205      */
 206     struct MeshTunnel           *next;
 207     struct MeshTunnel           *prev;
 208
 209     /**
 210      * Origin ID: Node that created the tunnel
 211      */
 212     GNUNET_PEER_Id              oid;
 213
 214     /**
 215      * Tunnel number (unique for a given oid)
 216      */
 217     MESH_TunnelID               tid;
 218
 219     /**
 220      * Minimal speed for this tunnel in kb/s
 221      */
 222     uint32_t                    speed_min;
 223
 224     /**
 225      * Maximal speed for this tunnel in kb/s
 226      */
 227     uint32_t                    speed_max;
 228
 229     /**
 230      * Last time the tunnel was used
 231      */
 232     struct GNUNET_TIME_Absolute timestamp;
 233
 234     /**
 235      * Peers in the tunnel, for future optimizations
 236      */
 237     struct MeshPeerInfo         *peers_head;
 238     struct MeshPeerInfo         *peers_tail;
 239
 240     /**
 241      * Number of peers that are connected and potentially ready to receive data
 242      */
 243     unsigned int                peers_ready;
 244
 245     /**
 246      * Number of peers that have been added to the tunnel
 247      */
 248     unsigned int                peers_total;
 249
 250     /**
 251      * Paths (used and backup)
 252      */
 253     struct MeshPath             *paths_head;
 254     struct MeshPath             *paths_tail;
 255
 256     /**
 257      * If this tunnel was created by a local client, what's its handle?
 258      */
 259     struct MeshClient           *client;
 260
 261     /**
 262      * Messages ready to transmit
 263      */
 264     struct MeshQueue            *out_head;
 265     struct MeshQueue            *out_tail;
 266
 267     /**
 268      * Messages received and not processed
 269      */
 270     struct MeshQueue            *in_head;
 271     struct MeshQueue            *in_tail;
 272
 273 };
 274
 275 /**
 276  * Struct containing information about a client of the service
 277  */
 278 struct MeshClient
 279 {
 280     /**
 281      * Double linked list
 282      */
 283     struct MeshClient           *next;
 284     struct MeshClient           *prev;
 285
 286     /**
 287      * Tunnels that belong to this client, for convenience on disconnect
 288      */
 289     struct MeshTunnel           *tunnels_head;
 290     struct MeshTunnel           *tunnels_tail;
 291
 292     /**
 293      * Handle to communicate with the client
 294      */
 295     struct GNUNET_SERVER_Client *handle;
 296
 297     /**
 298      * Applications that this client has claimed to provide
 299      */
 300     GNUNET_MESH_ApplicationType *apps;
 301     unsigned int                app_counter;
 302
 303     /**
 304      * Messages that this client has declared interest in
 305      */
 306     uint16_t                    *types;
 307     unsigned int                type_counter;
 308
 309     /**
 310      * Map tunnel IDs used by the client to owner and global tunnel ID
 311      */
 312     struct GNUNET_CONTAINER_MultiHashMap* tunnel_ids;
 313
 314 };
 315
 316 /******************************************************************************/
 317 /***********************      GLOBAL VARIABLES     ****************************/
 318 /******************************************************************************/
 319
 320 /**
 321  * All the clients
 322  */
 323 static struct MeshClient                *clients_head;
 324 static struct MeshClient                *clients_tail;
 325
 326 /**
 327  * Tunnels not owned by this node
 328  */
 329 // static struct MESH_Tunnel               *tunnels_head;
 330 // static struct MESH_Tunnel               *tunnels_tail;
 331
 332 /**
 333  * Handle to communicate with core
 334  */
 335 static struct GNUNET_CORE_Handle        *core_handle;
 336
 337 /**
 338  * Handle to use DHT
 339  */
 340 static struct GNUNET_DHT_Handle         *dht_handle;
 341
 342 /**
 343  * Local peer own ID (memory efficient handle)
 344  */
 345 static GNUNET_PEER_Id                   myid;
 346
 347 /******************************************************************************/
 348 /******************      GENERAL HELPER FUNCTIONS      ************************/
 349 /******************************************************************************/
 350
 351 /**
 352  * Check if client has registered with the service and has not disconnected
 353  * @param client the client to check
 354  * @return non-NULL if client exists in the global DLL
 355  */
 356 static struct MeshClient *
 357 retrieve_client (struct GNUNET_SERVER_Client *client)
 358 {
 359     struct MeshClient       *c;
 360
 361     c = clients_head;
 362     while (NULL != c) {
 363         if (c->handle == client) return c;
 364         c = c->next;
 365     }
 366     return NULL;
 367 }
 368
 369 /**
 370  * Destroy the path and free any allocated resources linked to it
 371  * @param t tunnel the path belongs to
 372  * @param p the path to destroy
 373  * @return GNUNET_OK on success
 374  */
 375 static int
 376 destroy_path(struct MeshTunnel  *t, struct MeshPath *p)
 377 {
 378     GNUNET_PEER_decrement_rcs(p->peers, p->length);
 379     GNUNET_free(p->peers);
 380     GNUNET_CONTAINER_DLL_remove(t->paths_head, t->paths_tail, p);
 381     GNUNET_free(p);
 382     return GNUNET_OK;
 383 }
 384
 385 /**
 386  * Destroy the peer_info and free any allocated resources linked to it
 387  * @param t tunnel the path belongs to
 388  * @param pi the peer_info to destroy
 389  * @return GNUNET_OK on success
 390  */
 391 static int
 392 destroy_peer_info(struct MeshTunnel  *t, struct MeshPeerInfo *pi)
 393 {
 394     GNUNET_PEER_change_rc(pi->id, -1);
 395     GNUNET_CONTAINER_DLL_remove(t->peers_head, t->peers_tail, pi);
 396     GNUNET_free(pi);
 397     return GNUNET_OK;
 398 }
 399
 400 /**
 401  * Destroy the tunnel and free any allocated resources linked to it
 402  * @param c client the tunnel belongs to
 403  * @param t the tunnel to destroy
 404  * @return GNUNET_OK on success
 405  */
 406 static int
 407 destroy_tunnel(struct MeshClient *c, struct MeshTunnel  *t)
 408 {
 409     struct MeshPeerInfo     *pi;
 410     struct MeshPath         *path;
 411
 412     if (NULL == t) return GNUNET_OK;
 413
 414     for (pi = t->peers_head; pi != NULL; pi = t->peers_head) {
 415         destroy_peer_info(t, pi);
 416     }
 417
 418     for (path = t->paths_head; path != NULL; path = t->paths_head) {
 419         destroy_path(t, path);
 420     }
 421
 422     GNUNET_CONTAINER_DLL_remove(c->tunnels_head, c->tunnels_tail, t);
 423     GNUNET_free(t);
 424     return GNUNET_OK;
 425 }
 426
 427 /******************************************************************************/
 428 /********************      MESH NETWORK HANDLERS     **************************/
 429 /******************************************************************************/
 430
 431 /**
 432  * Function called to notify a client about the socket
 433  * being ready to queue more data.  "buf" will be
 434  * NULL and "size" zero if the socket was closed for
 435  * writing in the meantime.
 436  *
 437  * @param cls closure
 438  * @param size number of bytes available in buf
 439  * @param buf where the callee should write the message
 440  * @return number of bytes written to buf
 441  */
 442 static size_t
 443 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
 444 {
 445     size_t                              size_needed;
 446     struct MeshPeerInfo                 *peer_info;
 447     struct GNUNET_MESH_ManipulatePath   *msg;
 448     struct MeshPath                     *p;
 449     struct GNUNET_PeerIdentity          peer_id;
 450     struct GNUNET_PeerIdentity          *peer_ptr;
 451     int                                 i;
 452
 453     if (0 == size && NULL == buf) {
 454         // TODO retry? cancel?
 455         return 0;
 456     }
 457     peer_info = (struct MeshPeerInfo *)cls;
 458     peer_info->dhtget = NULL;
 459     p = peer_info->t->paths_head;
 460     while (NULL != p) {
 461         if (p->peers[p->length-1] == peer_info->id) {
 462             break;
 463         }
 464         p = p->next;
 465     }
 466     if (p == NULL) return 0; // TODO Notify ERROR Path not found
 467
 468     size_needed = sizeof(struct GNUNET_MESH_ManipulatePath)
 469                   + p->length * sizeof(struct GNUNET_PeerIdentity);
 470     if (size < size_needed) {
 471         // TODO retry? cancel?
 472         return 0;
 473     }
 474
 475     msg = (struct GNUNET_MESH_ManipulatePath *) buf;
 476     msg->header.size = htons(sizeof(struct GNUNET_MESH_ManipulatePath));
 477     msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
 478     msg->speed_min = 0;
 479
 480     peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
 481     for (i = 0; i < p->length; i++) {
 482         GNUNET_PEER_resolve(p->peers[i], &peer_id);
 483         memcpy(&peer_ptr[i], &peer_id, sizeof(struct GNUNET_PeerIdentity));
 484     }
 485
 486     peer_info->state = MESH_PEER_WAITING;
 487
 488     return size_needed;
 489 }
 490
 491
 492 /**
 493  * Core handler for path creation
 494  * struct GNUNET_CORE_MessageHandler
 495  *
 496  * @param cls closure
 497  * @param message message
 498  * @param peer peer identity this notification is about
 499  * @param atsi performance data
 500  * @return GNUNET_OK to keep the connection open,
 501  *         GNUNET_SYSERR to close it (signal serious error)
 502  *
 503  */
 504 static int
 505 handle_mesh_path_create (void *cls,
 506                               const struct GNUNET_PeerIdentity *peer,
 507                               const struct GNUNET_MessageHeader *message,
 508                               const struct GNUNET_TRANSPORT_ATS_Information
 509                               *atsi)
 510 {
 511     /* Extract path */
 512     /* Find origin & self */
 513     /* Search for origin in local tunnels */
 514     /* Create tunnel / add path */
 515     /* Retransmit to next link in chain, if any (core_notify + callback) */
 516     return GNUNET_OK;
 517 }
 518
 519
 520 /**
 521  * Core handler for mesh network traffic
 522  *
 523  * @param cls closure
 524  * @param message message
 525  * @param peer peer identity this notification is about
 526  * @param atsi performance data
 527  * @return GNUNET_OK to keep the connection open,
 528  *         GNUNET_SYSERR to close it (signal serious error)
 529  */
 530 static int
 531 handle_mesh_network_traffic (void *cls,
 532                              const struct GNUNET_PeerIdentity *peer,
 533                              const struct GNUNET_MessageHeader *message,
 534                              const struct GNUNET_TRANSPORT_ATS_Information
 535                              *atsi)
 536 {
 537     if (GNUNET_MESSAGE_TYPE_MESH_DATA_GO == ntohs(message->type)) {
 538         /* Retransmit to next in path of tunnel identified by message */
 539         return GNUNET_OK;
 540     } else { /* GNUNET_MESSAGE_TYPE_MESH_DATA_BACK */
 541         /* Retransmit to previous in path of tunnel identified by message */
 542         return GNUNET_OK;
 543     }
 544 }
 545
 546
 547 /**
 548  * Functions to handle messages from core
 549  */
 550 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
 551   {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
 552   {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_GO, 0},
 553   {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_BACK, 0},
 554   {NULL, 0, 0}
 555 };
 556
 557
 558
 559 /******************************************************************************/
 560 /*********************       MESH LOCAL HANDLES      **************************/
 561 /******************************************************************************/
 562
 563 /**
 564  * notify_client_connection_failure: notify a client that the connection to the
 565  * requested remote peer is not possible (for instance, no route found)
 566  * Function called when the socket is ready to queue more data."buf" will be
 567  * NULL and "size" zero if the socket was closed for writing in the meantime.
 568  *
 569  * @param cls closure
 570  * @param size number of bytes available in buf
 571  * @param buf where the callee should write the message
 572  * @return number of bytes written to buf
 573  */
 574 static size_t
 575 notify_client_connection_failure (void *cls, size_t size, void *buf)
 576 {
 577     int                                 size_needed;
 578     struct MeshPeerInfo                 *peer_info;
 579     struct GNUNET_MESH_PeerControl      *msg;
 580     struct GNUNET_PeerIdentity          id;
 581
 582     if (0 == size && NULL == buf) {
 583         // TODO retry? cancel?
 584         return 0;
 585     }
 586
 587     size_needed = sizeof(struct GNUNET_MESH_PeerControl);
 588     peer_info = (struct MeshPeerInfo *) cls;
 589     msg = (struct GNUNET_MESH_PeerControl *) buf;
 590     msg->header.size = htons(sizeof(struct GNUNET_MESH_PeerControl));
 591     msg->header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
 592     msg->tunnel_id = htonl(peer_info->t->tid);
 593     GNUNET_PEER_resolve(peer_info->id, &id);
 594     memcpy(&msg->peer, &id, sizeof(struct GNUNET_PeerIdentity));
 595
 596     return size_needed;
 597 }
 598
 599
 600 /**
 601  * Function to process paths received for a new peer addition. The recorded
 602  * paths form the initial tunnel, which can be optimized later.
 603  * Called on each result obtained for the DHT search.
 604  *
 605  * @param cls closure
 606  * @param exp when will this value expire
 607  * @param key key of the result
 608  * @param get_path NULL-terminated array of pointers
 609  *                 to the peers on reverse GET path (or NULL if not recorded)
 610  * @param put_path NULL-terminated array of pointers
 611  *                 to the peers on the PUT path (or NULL if not recorded)
 612  * @param type type of the result
 613  * @param size number of bytes in data
 614  * @param data pointer to the result data
 615  */
 616 static void
 617 dht_get_response_handler(void *cls,
 618                         struct GNUNET_TIME_Absolute exp,
 619                         const GNUNET_HashCode * key,
 620                         const struct GNUNET_PeerIdentity * const *get_path,
 621                         const struct GNUNET_PeerIdentity * const *put_path,
 622                         enum GNUNET_BLOCK_Type type,
 623                         size_t size,
 624                         const void *data)
 625 {
 626     struct MeshPeerInfo         *peer_info;
 627     struct MeshTunnel           *t;
 628     struct MeshPath             *p;
 629     int                         i;
 630
 631     peer_info = (struct MeshPeerInfo *)cls;
 632     t = peer_info->t;
 633
 634     if (NULL == get_path || NULL == put_path) {
 635         // TODO: find ourselves some alternate initial path to the destination
 636         GNUNET_SERVER_notify_transmit_ready(
 637             t->client->handle,
 638             sizeof(struct GNUNET_MESH_PeerControl),
 639             GNUNET_TIME_relative_get_forever(),
 640             &notify_client_connection_failure,
 641             peer_info
 642         );
 643     }
 644
 645     p = GNUNET_malloc(sizeof(struct MeshPath));
 646     GNUNET_CONTAINER_DLL_insert(t->paths_head, t->paths_tail, p);
 647     for (i = 0; get_path[i] != NULL; i++);
 648     for (i--; i >= 0; i--) {
 649         p->peers = GNUNET_realloc(p->peers,
 650                                    sizeof(GNUNET_PEER_Id) * (p->length + 1));
 651         p->peers[p->length] = GNUNET_PEER_intern(get_path[i]);
 652         p->length++;
 653     }
 654     for (i = 0; put_path[i] != NULL; i++);
 655     for (i--; i >= 0; i--) {
 656         p->peers = GNUNET_realloc(p->peers,
 657                                   sizeof(GNUNET_PEER_Id) * (p->length + 1));
 658         p->peers[p->length] = GNUNET_PEER_intern(put_path[i]);
 659         p->length++;
 660     }
 661     // p->id = 0; // FIXME generate ID or remove field
 662     p->in_use = 0;
 663     // peer_info->first_hop = p->peers[1]; // FIXME do this on path completion
 664     GNUNET_CORE_notify_transmit_ready(core_handle,
 665                                       0,
 666                                       0,
 667                                       GNUNET_TIME_relative_get_forever(),
 668                                       get_path[1],
 669                                       sizeof(struct GNUNET_MESH_ManipulatePath)
 670                                         + (p->length
 671                                         * sizeof (struct GNUNET_PeerIdentity)),
 672                                       &send_core_create_path_for_peer,
 673                                       peer_info);
 674     return;
 675 }
 676
 677
 678 /**
 679  * Handler for client disconnection
 680  *
 681  * @param cls closure
 682  * @param client identification of the client; NULL
 683  *        for the last call when the server is destroyed
 684  */
 685 static void
 686 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
 687 {
 688     struct MeshClient   *c, *next;
 689     struct MeshTunnel   *t;
 690
 691     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 692                "MESH: client disconnected\n");
 693     c = clients_head;
 694     while (NULL != c) {
 695         if (c->handle == client) {
 696             GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 697                "MESH: matching client found, cleaning\n");
 698             GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
 699             while (NULL != (t = c->tunnels_head)) {
 700                 destroy_tunnel(c, t);
 701             }
 702             if(0 != c->app_counter) GNUNET_free (c->apps);
 703             if(0 != c->type_counter) GNUNET_free (c->types);
 704             GNUNET_CONTAINER_multihashmap_destroy(c->tunnel_ids);
 705             next = c->next;
 706             GNUNET_free (c);
 707             c = next;
 708         } else {
 709             c = c->next;
 710         }
 711     }
 712     return;
 713 }
 714
 715
 716 /**
 717  * Handler for new clients
 718  *
 719  * @param cls closure
 720  * @param client identification of the client
 721  * @param message the actual message, which includes messages the client wants
 722  */
 723 static void
 724 handle_local_new_client (void *cls,
 725                          struct GNUNET_SERVER_Client *client,
 726                          const struct GNUNET_MessageHeader *message)
 727 {
 728     struct GNUNET_MESH_ClientConnect    *cc_msg;
 729     struct MeshClient                   *c;
 730     unsigned int                        payload_size;
 731     uint16_t                            types;
 732     uint16_t                            apps;
 733
 734     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 735                "MESH: new client connected\n");
 736     /* Check data sanity */
 737     payload_size = ntohs(message->size)
 738                    - sizeof(struct GNUNET_MESH_ClientConnect);
 739     cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
 740     types = ntohs(cc_msg->types);
 741     apps = ntohs(cc_msg->applications);
 742     if (payload_size !=
 743         types * sizeof(uint16_t) + apps * sizeof(GNUNET_MESH_ApplicationType))
 744     {
 745         GNUNET_break(0);
 746         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 747         return;
 748     }
 749
 750     /* Create new client structure */
 751     c = GNUNET_malloc(sizeof(struct MeshClient));
 752     c->handle = client;
 753     if (types != 0) {
 754         c->type_counter = types;
 755         c->types = GNUNET_malloc(types * sizeof(uint16_t));
 756         memcpy(c->types, &message[1], types * sizeof(uint16_t));
 757     }
 758     if (apps != 0) {
 759         c->app_counter = apps;
 760         c->apps = GNUNET_malloc(apps * sizeof(GNUNET_MESH_ApplicationType));
 761         memcpy(c->apps,
 762                &message[1] + types * sizeof(uint16_t),
 763                apps * sizeof(GNUNET_MESH_ApplicationType));
 764     }
 765     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 766                "MESH:  client has %u+%u subscriptions\n",
 767                c->type_counter,
 768                c->app_counter);
 769
 770     /* Insert new client in DLL */
 771     GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
 772     c->tunnel_ids = GNUNET_CONTAINER_multihashmap_create(100);
 773
 774     GNUNET_SERVER_receive_done(client, GNUNET_OK);
 775
 776 }
 777
 778
 779 /**
 780  * Handler for requests of new tunnels
 781  *
 782  * @param cls closure
 783  * @param client identification of the client
 784  * @param message the actual message
 785  */
 786 static void
 787 handle_local_tunnel_create (void *cls,
 788                             struct GNUNET_SERVER_Client *client,
 789                             const struct GNUNET_MessageHeader *message)
 790 {
 791     struct GNUNET_MESH_TunnelMessage    *tunnel_msg;
 792     struct MeshTunnel                   *t;
 793     struct MeshClient                   *c;
 794     GNUNET_HashCode                     hash;
 795
 796     /* Sanity check for client registration */
 797     if (NULL == (c = retrieve_client(client))) {
 798         GNUNET_break(0);
 799         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 800         return;
 801     }
 802
 803     /* Message sanity check */
 804     if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
 805         GNUNET_break(0);
 806         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 807         return;
 808     }
 809
 810     tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
 811     /* Sanity check for tunnel numbering */
 812     if (0 == (ntohl(tunnel_msg->tunnel_id) & 0x80000000)) {
 813         GNUNET_break(0);
 814         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 815         return;
 816     }
 817     /* Sanity check for duplicate tunnel IDs */
 818     t = c->tunnels_head;
 819     while (NULL != t) {
 820         if (t->tid == ntohl(tunnel_msg->tunnel_id)) {
 821             GNUNET_break(0);
 822             GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 823             return;
 824         }
 825         t = t->next;
 826     }
 827     t = GNUNET_malloc(sizeof(struct MeshTunnel ));
 828     t->tid = ntohl(tunnel_msg->tunnel_id);
 829     t->oid = myid;
 830     t->client = c;
 831
 832     GNUNET_CRYPTO_hash(&t->tid, sizeof(MESH_TunnelID), &hash);
 833     if (GNUNET_OK !=
 834         GNUNET_CONTAINER_multihashmap_put(c->tunnel_ids, &hash, t,
 835                             GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
 836     {
 837         GNUNET_break(0);
 838         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 839         return;
 840     }
 841
 842     GNUNET_CONTAINER_DLL_insert(c->tunnels_head, c->tunnels_tail, t);
 843
 844     GNUNET_SERVER_receive_done(client, GNUNET_OK);
 845     return;
 846 }
 847
 848
 849 /**
 850  * Handler for requests of deleting tunnels
 851  *
 852  * @param cls closure
 853  * @param client identification of the client
 854  * @param message the actual message
 855  */
 856 static void
 857 handle_local_tunnel_destroy (void *cls,
 858                              struct GNUNET_SERVER_Client *client,
 859                              const struct GNUNET_MessageHeader *message)
 860 {
 861     struct GNUNET_MESH_TunnelMessage    *tunnel_msg;
 862     struct MeshClient                   *c;
 863     struct MeshTunnel                   *t;
 864     MESH_TunnelID                       tid;
 865     GNUNET_HashCode                     hash;
 866
 867
 868     /* Sanity check for client registration */
 869     if (NULL == (c = retrieve_client(client))) {
 870         GNUNET_break(0);
 871         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 872         return;
 873     }
 874     /* Message sanity check */
 875     if (sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) {
 876         GNUNET_break(0);
 877         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 878         return;
 879     }
 880
 881     tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
 882
 883     /* Retrieve tunnel */
 884     tid = ntohl(tunnel_msg->tunnel_id);
 885     GNUNET_CRYPTO_hash(&tid, sizeof(MESH_TunnelID), &hash);
 886     t = GNUNET_CONTAINER_multihashmap_get(c->tunnel_ids, &hash);
 887     GNUNET_CONTAINER_multihashmap_remove_all(c->tunnel_ids, &hash);
 888     destroy_tunnel(c, t);
 889
 890     GNUNET_SERVER_receive_done(client, GNUNET_OK);
 891     return;
 892 }
 893
 894
 895 /**
 896  * Handler for connection requests to new peers
 897  *
 898  * @param cls closure
 899  * @param client identification of the client
 900  * @param message the actual message (PeerControl)
 901  */
 902 static void
 903 handle_local_connect_add (void *cls,
 904                           struct GNUNET_SERVER_Client *client,
 905                           const struct GNUNET_MessageHeader *message)
 906 {
 907     struct GNUNET_MESH_PeerControl      *peer_msg;
 908     struct MeshClient                   *c;
 909     struct MeshTunnel                   *t;
 910     MESH_TunnelID                       tid;
 911     struct MeshPeerInfo                 *peer_info;
 912     GNUNET_HashCode                     key;
 913
 914
 915     /* Sanity check for client registration */
 916     if (NULL == (c = retrieve_client(client))) {
 917         GNUNET_break(0);
 918         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 919         return;
 920     }
 921
 922     peer_msg = (struct GNUNET_MESH_PeerControl *)message;
 923     /* Sanity check for message size */
 924     if (sizeof(struct GNUNET_MESH_PeerControl) != ntohs(peer_msg->header.size)) {
 925         GNUNET_break(0);
 926         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 927         return;
 928     }
 929
 930     /* Tunnel exists? */
 931     tid = ntohl(peer_msg->tunnel_id);
 932     t = c->tunnels_head;
 933     while (NULL != t) {
 934         if (t->tid == tid) {
 935             break;
 936         }
 937         t = t->next;
 938     }
 939     if (NULL == t) {
 940         GNUNET_break(0);
 941         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 942         return;
 943     }
 944
 945     /* Does client own tunnel? */
 946     if (t->client->handle != client) {
 947         GNUNET_break(0);
 948         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
 949         return;
 950     }
 951
 952     /* Ok, add peer to tunnel */
 953     peer_info = (struct MeshPeerInfo *) GNUNET_malloc(sizeof(struct MeshPeerInfo));
 954     peer_info->id = GNUNET_PEER_intern(&peer_msg->peer);
 955     peer_info->state = MESH_PEER_SEARCHING;
 956     peer_info->t = t;
 957     t->peers_total++;
 958     GNUNET_CONTAINER_DLL_insert(t->peers_head, t->peers_tail, peer_info);
 959     /* Start DHT search */
 960     GNUNET_CRYPTO_hash (&peer_msg->peer,
 961                         sizeof(struct GNUNET_PeerIdentity),
 962                         &key);
 963     peer_info->dhtget = GNUNET_DHT_get_start(dht_handle,
 964                                             GNUNET_TIME_relative_get_forever(),
 965                                             GNUNET_BLOCK_TYPE_ANY,
 966                                             &key,
 967                                             4,    /* replication level */
 968                                             GNUNET_DHT_RO_RECORD_ROUTE,
 969                                             NULL, /* bloom filter */
 970                                             0,    /* mutator */
 971                                             NULL, /* xquery */
 972                                             0,    /* xquery bits */
 973                                             dht_get_response_handler,
 974                                             (void *)peer_info);
 975
 976     GNUNET_SERVER_receive_done(client, GNUNET_OK);
 977     return;
 978 }
 979
 980
 981 /**
 982  * Handler for disconnection requests of peers in a tunnel
 983  *
 984  * @param cls closure
 985  * @param client identification of the client
 986  * @param message the actual message (PeerControl)
 987  */
 988 static void
 989 handle_local_connect_del (void *cls,
 990                           struct GNUNET_SERVER_Client *client,
 991                           const struct GNUNET_MessageHeader *message)
 992 {
 993     struct GNUNET_MESH_PeerControl      *peer_msg;
 994     struct MeshClient                   *c;
 995     struct MeshTunnel                   *t;
 996     struct MeshPath                     *p;
 997     struct MeshPath                     *aux_path;
 998     MESH_TunnelID                       tid;
 999     GNUNET_PEER_Id                      peer_id;
1000     struct MeshPeerInfo                 *peer_info;
1001     struct MeshPeerInfo                 *aux_peer_info;
1002
1003     /* Sanity check for client registration */
1004     if (NULL == (c = retrieve_client(client))) {
1005         GNUNET_break(0);
1006         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1007         return;
1008     }
1009     peer_msg = (struct GNUNET_MESH_PeerControl *)message;
1010     /* Sanity check for message size */
1011     if (sizeof(struct GNUNET_MESH_PeerControl) != ntohs(peer_msg->header.size)) {
1012         GNUNET_break(0);
1013         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1014         return;
1015     }
1016
1017     /* Tunnel exists? */
1018     tid = ntohl(peer_msg->tunnel_id);
1019     if (NULL == (t = c->tunnels_head)) {
1020         GNUNET_break(0);
1021         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1022         return;
1023     }
1024     while (NULL != t) {
1025         if (t->tid == tid) {
1026             break;
1027         }
1028         if (t == c->tunnels_tail) {
1029             GNUNET_break(0);
1030             GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1031             return;
1032         }
1033         t = t->next;
1034     }
1035     if (NULL == t) {
1036             GNUNET_break(0);
1037             GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1038             return;
1039         }
1040
1041     /* Does client own tunnel? */
1042     if (t->client->handle != client) {
1043         GNUNET_break(0);
1044         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1045         return;
1046     }
1047
1048     /* Ok, delete peer from tunnel */
1049     peer_id = GNUNET_PEER_intern(&peer_msg->peer);
1050
1051     /* Delete paths */
1052     p = t->paths_head;
1053     while (p != NULL) {
1054         if (p->peers[p->length-1] == peer_id) { /* one path per destination */
1055             GNUNET_CONTAINER_DLL_remove(t->paths_head, t->paths_tail, p);
1056             GNUNET_PEER_decrement_rcs(p->peers, p->length);
1057             aux_path = p;
1058             p = p->next;
1059             GNUNET_free(aux_path);
1060         } else {
1061             p = p->next;
1062         }
1063     }
1064
1065     /*Delete peer info */
1066     peer_info = t->peers_head;
1067     while (peer_info != NULL) {
1068         if (peer_info->id == peer_id) {
1069             GNUNET_CONTAINER_DLL_remove(t->peers_head,
1070                                         t->peers_tail,
1071                                         peer_info);
1072             aux_peer_info = peer_info;
1073             peer_info = peer_info->next;
1074             GNUNET_free(aux_peer_info);
1075         } else {
1076             peer_info = peer_info->next;
1077         }
1078     }
1079
1080     GNUNET_PEER_change_rc(peer_id, -1);
1081
1082     GNUNET_SERVER_receive_done(client, GNUNET_OK);
1083     return;
1084 }
1085
1086
1087 /**
1088  * Handler for connection requests to new peers by type
1089  *
1090  * @param cls closure
1091  * @param client identification of the client
1092  * @param message the actual message (ConnectPeerByType)
1093  */
1094 static void
1095 handle_local_connect_by_type (void *cls,
1096                               struct GNUNET_SERVER_Client *client,
1097                               const struct GNUNET_MessageHeader *message)
1098 {
1099     struct GNUNET_MESH_ConnectPeerByType        *connect_msg;
1100     MESH_TunnelID                               tid;
1101     GNUNET_MESH_ApplicationType                 application;
1102     struct MeshClient                           *c;
1103     struct MeshTunnel                           *t;
1104
1105     /* Sanity check for client registration */
1106     if (NULL == (c = retrieve_client(client))) {
1107         GNUNET_break(0);
1108         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1109         return;
1110     }
1111
1112     connect_msg = (struct GNUNET_MESH_ConnectPeerByType *)message;
1113     /* Sanity check for message size */
1114     if (sizeof(struct GNUNET_MESH_PeerControl) !=
1115             ntohs(connect_msg->header.size))
1116     {
1117         GNUNET_break(0);
1118         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1119         return;
1120     }
1121
1122     /* Tunnel exists? */
1123     tid = ntohl(connect_msg->tunnel_id);
1124     t = c->tunnels_head;
1125     while (NULL != t) {
1126         if (t->tid == tid) {
1127             break;
1128         }
1129         t = t->next;
1130     }
1131     if (NULL == t) {
1132         GNUNET_break(0);
1133         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1134         return;
1135     }
1136
1137     /* Does client own tunnel? */
1138     if (t->client->handle != client) {
1139         GNUNET_break(0);
1140         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1141         return;
1142     }
1143
1144     /* Ok, lets find a peer offering the service */
1145     application = ntohl(connect_msg->type);
1146     application++; // FIXME silence warnings
1147
1148     GNUNET_SERVER_receive_done(client, GNUNET_OK);
1149     return;
1150 }
1151
1152
1153 /**
1154  * Handler for client traffic directed to one peer
1155  *
1156  * @param cls closure
1157  * @param client identification of the client
1158  * @param message the actual message
1159  */
1160 static void
1161 handle_local_network_traffic (void *cls,
1162                          struct GNUNET_SERVER_Client *client,
1163                          const struct GNUNET_MessageHeader *message)
1164 {
1165     struct MeshClient                           *c;
1166     struct MeshTunnel                           *t;
1167     struct GNUNET_MESH_Data                     *data_msg;
1168     MESH_TunnelID                               tid;
1169
1170     /* Sanity check for client registration */
1171     if (NULL == (c = retrieve_client(client))) {
1172         GNUNET_break(0);
1173         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1174         return;
1175     }
1176     data_msg = (struct GNUNET_MESH_Data *)message;
1177     /* Sanity check for message size */
1178     if (sizeof(struct GNUNET_MESH_PeerControl) !=
1179             ntohs(data_msg->header.size))
1180     {
1181         GNUNET_break(0);
1182         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1183         return;
1184     }
1185
1186     /* Tunnel exists? */
1187     tid = ntohl(data_msg->tunnel_id);
1188     t = c->tunnels_head;
1189     while (NULL != t) {
1190         if (t->tid == tid) {
1191             break;
1192         }
1193         t = t->next;
1194     }
1195     if (NULL == t) {
1196         GNUNET_break(0);
1197         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1198         return;
1199     }
1200
1201     /* Does client own tunnel? */
1202     if (t->client->handle != client) {
1203         GNUNET_break(0);
1204         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1205         return;
1206     }
1207
1208     /* TODO */
1209
1210     GNUNET_SERVER_receive_done(client, GNUNET_OK);
1211     return;
1212 }
1213
1214 /**
1215  * Handler for client traffic directed to all peers in a tunnel
1216  *
1217  * @param cls closure
1218  * @param client identification of the client
1219  * @param message the actual message
1220  */
1221 static void
1222 handle_local_network_traffic_bcast (void *cls,
1223                                     struct GNUNET_SERVER_Client *client,
1224                                     const struct GNUNET_MessageHeader *message)
1225 {
1226     struct MeshClient                           *c;
1227     struct MeshTunnel                           *t;
1228     struct GNUNET_MESH_DataBroadcast            *data_msg;
1229     MESH_TunnelID                               tid;
1230
1231     /* Sanity check for client registration */
1232     if (NULL == (c = retrieve_client(client))) {
1233         GNUNET_break(0);
1234         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1235         return;
1236     }
1237     data_msg = (struct GNUNET_MESH_DataBroadcast *)message;
1238     /* Sanity check for message size */
1239     if (sizeof(struct GNUNET_MESH_PeerControl) != ntohs(data_msg->header.size)) {
1240         GNUNET_break(0);
1241         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1242         return;
1243     }
1244
1245     /* Tunnel exists? */
1246     tid = ntohl(data_msg->tunnel_id);
1247     t = c->tunnels_head;
1248     while (NULL != t) {
1249         if (t->tid == tid) {
1250             break;
1251         }
1252         t = t->next;
1253     }
1254     if (NULL == t) {
1255         GNUNET_break(0);
1256         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1257         return;
1258     }
1259
1260     /* Does client own tunnel? */
1261     if (t->client->handle != client) {
1262         GNUNET_break(0);
1263         GNUNET_SERVER_receive_done(client, GNUNET_SYSERR);
1264         return;
1265     }
1266
1267     /*  TODO */
1268
1269     GNUNET_SERVER_receive_done(client, GNUNET_OK);
1270     return;
1271 }
1272
1273 /**
1274  * Functions to handle messages from clients
1275  */
1276 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1277   {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
1278   {&handle_local_tunnel_create, NULL,
1279    GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
1280    sizeof(struct GNUNET_MESH_TunnelMessage)},
1281   {&handle_local_tunnel_destroy, NULL,
1282    GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
1283    sizeof(struct GNUNET_MESH_TunnelMessage)},
1284   {&handle_local_connect_add, NULL,
1285    GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD,
1286    sizeof(struct GNUNET_MESH_PeerControl)},
1287   {&handle_local_connect_del, NULL,
1288    GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL,
1289    sizeof(struct GNUNET_MESH_PeerControl)},
1290   {&handle_local_connect_by_type, NULL,
1291    GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE,
1292    sizeof(struct GNUNET_MESH_ConnectPeerByType)},
1293   {&handle_local_network_traffic, NULL,
1294    GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
1295   {&handle_local_network_traffic_bcast, NULL,
1296    GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0},
1297   {NULL, NULL, 0, 0}
1298 };
1299
1300
1301 /**
1302  * To be called on core init/fail.
1303  *
1304  * @param cls service closure
1305  * @param server handle to the server for this service
1306  * @param identity the public identity of this peer
1307  * @param publicKey the public key of this peer
1308  */
1309 static void
1310 core_init (void *cls,
1311            struct GNUNET_CORE_Handle *server,
1312            const struct GNUNET_PeerIdentity *identity,
1313            const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
1314 {
1315     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1316                 "Core init\n");
1317     core_handle = server;
1318     myid = GNUNET_PEER_intern(identity);
1319     return;
1320 }
1321
1322 /**
1323  * Method called whenever a given peer connects.
1324  *
1325  * @param cls closure
1326  * @param peer peer identity this notification is about
1327  * @param atsi performance data for the connection
1328  */
1329 static void
1330 core_connect (void *cls,
1331               const struct GNUNET_PeerIdentity *peer,
1332               const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1333 {
1334     GNUNET_PEER_Id      pid;
1335     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1336                 "Peer connected\n");
1337     pid = GNUNET_PEER_intern(peer);
1338     if (myid == pid) {
1339         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1340                 "     (self)\n");
1341     }
1342     return;
1343 }
1344
1345 /**
1346  * Method called whenever a peer disconnects.
1347  *
1348  * @param cls closure
1349  * @param peer peer identity this notification is about
1350  */
1351 static void
1352 core_disconnect (void *cls,
1353                 const struct
1354                 GNUNET_PeerIdentity *peer)
1355 {
1356     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1357                 "Peer disconnected\n");
1358     return;
1359 }
1360
1361 /******************************************************************************/
1362 /************************      MAIN FUNCTIONS      ****************************/
1363 /******************************************************************************/
1364
1365 /**
1366  * Task run during shutdown.
1367  *
1368  * @param cls unused
1369  * @param tc unused
1370  */
1371 static void
1372 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1373 {
1374     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1375                 "MESH shutting down\n");
1376     if (core_handle != NULL) {
1377         GNUNET_CORE_disconnect (core_handle);
1378         core_handle = NULL;
1379     }
1380     if (dht_handle != NULL) {
1381         GNUNET_DHT_disconnect (dht_handle);
1382         dht_handle = NULL;
1383     }
1384 }
1385
1386 /**
1387  * Process mesh requests.
1388  *
1389  * @param cls closure
1390  * @param server the initialized server
1391  * @param c configuration to use
1392  */
1393 static void
1394 run (void *cls,
1395      struct GNUNET_SERVER_Handle *server,
1396      const struct GNUNET_CONFIGURATION_Handle *c)
1397 {
1398     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1399                 "MESH starting to run\n");
1400     GNUNET_SERVER_add_handlers (server, plugin_handlers);
1401     GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
1402     core_handle = GNUNET_CORE_connect (c,               /* Main configuration */
1403                             32,                                 /* queue size */
1404                             NULL,         /* Closure passed to MESH functions */
1405                             &core_init,      /* Call core_init once connected */
1406                             &core_connect,                 /* Handle connects */
1407                             &core_disconnect,  /* remove peers on disconnects */
1408                             NULL,       /* Do we care about "status" updates? */
1409                             NULL, /* Don't notify about all incoming messages */
1410                             GNUNET_NO,     /* For header only in notification */
1411                             NULL, /* Don't notify about all outbound messages */
1412                             GNUNET_NO,    /* For header-only out notification */
1413                             core_handlers);        /* Register these handlers */
1414     if (core_handle == NULL) {
1415         GNUNET_break(0);
1416     }
1417     dht_handle = GNUNET_DHT_connect(c, 100); /* FIXME ht len correct size? */
1418     if (dht_handle == NULL) {
1419         GNUNET_break(0);
1420     }
1421
1422     /* Scheduled the task to clean up when shutdown is called */
1423     GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
1424                                   &shutdown_task, NULL);
1425
1426 }
1427
1428 /**
1429  * The main function for the mesh service.
1430  *
1431  * @param argc number of arguments from the command line
1432  * @param argv command line arguments
1433  * @return 0 ok, 1 on error
1434  */
1435 int
1436 main (int argc, char *const *argv)
1437 {
1438     int ret;
1439
1440     ret = (GNUNET_OK ==
1441            GNUNET_SERVICE_run (argc,
1442                                argv,
1443                                "mesh",
1444                                GNUNET_SERVICE_OPTION_NONE,
1445                                &run, NULL)) ? 0 : 1;
1446     return ret;
1447 }