/* This file is part of GNUnet. (C) 2001 - 2011 Christian Grothoff (and other contributing authors) GNUnet is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNUnet; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /** * @file mesh/gnunet-service-mesh.c * @brief GNUnet MESH service * @author Bartlomiej Polot * * STRUCTURE: * - MESH NETWORK MESSAGES * - DATA STRUCTURES * - GLOBAL VARIABLES * - MESH NETWORK HANDLES * - MESH LOCAL HANDLES * - MAIN FUNCTIONS (main & run) * * TODO: * - soft stateing (keep-alive (CHANGE?) / timeout / disconnect) -- not a message issue * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message! * - partial disconnect reporting -- same as error reporting? * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking... * - speed requirement specification (change?) in mesh API -- API call */ #include "platform.h" #include "gnunet_common.h" #include "gnunet_util_lib.h" #include "gnunet_peer_lib.h" #include "gnunet_core_service.h" #include "gnunet_protocols.h" #include "mesh.h" #include "gnunet_dht_service.h" /******************************************************************************/ /******************** MESH NETWORK MESSAGES **************************/ /******************************************************************************/ /** * Message for mesh path management */ struct GNUNET_MESH_ManipulatePath { /** * Type: GNUNET_MESSAGE_TYPE_MESH_PATH_[CREATE|CHANGE|ADD|DEL] * * Size: sizeof(struct GNUNET_MESH_ManipulatePath) + * path_length * sizeof (struct GNUNET_PeerIdentity) */ struct GNUNET_MessageHeader header; /** * Global id of the tunnel this path belongs to, * unique in conjunction with the origin. */ uint32_t tid GNUNET_PACKED; /** * Information about speed requirements. If the tunnel cannot sustain the * minimum bandwidth, packets are to be dropped. */ uint32_t speed_min GNUNET_PACKED; /** * 64-bit alignment. */ uint32_t reserved GNUNET_PACKED; /** * path_length structs defining the *whole* path from the origin [0] to the * final destination [path_length-1]. */ /* struct GNUNET_PeerIdentity peers[path_length]; */ }; /** * Message for mesh data traffic to all tunnel targets. */ struct GNUNET_MESH_OriginMulticast { /** * Type: GNUNET_MESSAGE_TYPE_DATA_MULTICAST */ struct GNUNET_MessageHeader header; /** * TID of the tunnel */ uint32_t tid GNUNET_PACKED; /** * OID of the tunnel */ struct GNUNET_PeerIdentity oid; /** * Payload follows */ }; /** * Message for mesh data traffic to a particular destination from origin. */ struct GNUNET_MESH_DataMessageFromOrigin { /** * Type: GNUNET_MESSAGE_TYPE_DATA_MESSAGE_FROM_ORIGIN */ struct GNUNET_MessageHeader header; /** * TID of the tunnel */ uint32_t tid GNUNET_PACKED; /** * OID of the tunnel */ struct GNUNET_PeerIdentity oid; /** * Destination. */ struct GNUNET_PeerIdentity destination; /** * Payload follows */ }; /** * Message for mesh data traffic from a tunnel participant to origin. */ struct GNUNET_MESH_DataMessageToOrigin { /** * Type: GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN */ struct GNUNET_MessageHeader header; /** * TID of the tunnel */ uint32_t tid GNUNET_PACKED; /** * OID of the tunnel */ struct GNUNET_PeerIdentity oid; /** * Sender of the message. */ struct GNUNET_PeerIdentity sender; /** * Payload follows */ }; /** * Message for mesh flow control */ struct GNUNET_MESH_SpeedNotify { /** * Type: GNUNET_MESSAGE_TYPE_DATA_SPEED_NOTIFY */ struct GNUNET_MessageHeader header; /** * TID of the tunnel */ uint32_t tid GNUNET_PACKED; /** * OID of the tunnel */ struct GNUNET_PeerIdentity oid; /** * Slowest link down the path (above minimum speed requirement). */ uint32_t speed_min; }; /******************************************************************************/ /************************ DATA STRUCTURES ****************************/ /******************************************************************************/ /** * All the states a peer participating in a tunnel can be in. */ enum PeerState { /** * Request sent, not yet answered. */ MESH_PEER_WAITING, /** * Peer connected and ready to accept data */ MESH_PEER_READY, /** * Peer connected previosly but not responding */ MESH_PEER_RECONNECTING, }; /** * Struct containing all information regarding a given peer */ struct PeerInfo { /** * Double linked list */ struct PeerInfo *next; struct PeerInfo *prev; /** * ID of the peer */ GNUNET_PEER_Id id; /** * Is the peer reachable? Is the peer even connected? */ enum PeerState state; /** * When to try to establish contact again? */ struct GNUNET_TIME_Absolute next_reconnect_attempt; /** * Who to send the data to --- FIXME what about multiple (alternate) paths? */ GNUNET_PEER_Id first_hop; /** * Max data rate to this peer */ uint32_t max_speed; }; typedef uint32_t MESH_PathID; /** * Information regarding a path */ struct Path { /** * Double linked list */ struct Path *next; struct Path *prev; /** * Id of the path, in case it's needed */ MESH_PathID id; /** * Whether the path is serving traffic in a tunnel or is a backup */ int in_use; /** * List of all the peers that form the path from origin to target */ GNUNET_PEER_Id *peers; }; struct MESH_queue { /** * Double linked list */ struct MESH_queue *next; struct MESH_queue *prev; /** * Size of the message to transmit */ unsigned int size; /** * How old is the data? */ struct GNUNET_TIME_Absolute timestamp; /** * Data itself */ struct GNUNET_MessageHeader *data; }; struct Client; /* FWD declaration */ /** * Struct containing all information regarding a tunnel * For an intermediate node the improtant info used will be: * - OID \ To identify * - TID / the tunnel * - paths[0] | To know where to send it next * - metainfo: ready, speeds, accounting * For an end node more fields will be needed (client-handling) */ struct MESH_tunnel { /** * Double linked list */ struct MESH_tunnel *next; struct MESH_tunnel *prev; /** * Origin ID: Node that created the tunnel */ GNUNET_PEER_Id oid; /** * Tunnel number (unique for a given oid) */ MESH_TunnelID tid; /** * Minimal speed for this tunnel in kb/s */ uint32_t speed_min; /** * Maximal speed for this tunnel in kb/s */ uint32_t speed_max; /** * Last time the tunnel was used */ struct GNUNET_TIME_Absolute timestamp; /** * Peers in the tunnel, for future optimizations */ struct PeerInfo *peers_head; struct PeerInfo *peers_tail; /** * Number of peers that are connected and potentially ready to receive data */ unsigned int peers_ready; /** * Number of peers that have been added to the tunnel */ unsigned int peers_total; /** * Paths (used and backup) */ struct Path *paths_head; struct Path *paths_tail; /** * If this tunnel was created by a local client, what's its handle? */ struct Client *client; /** * Messages ready to transmit */ struct MESH_queue *out_head; struct MESH_queue *out_tail; /** * Messages received and not processed */ struct MESH_queue *in_head; struct MESH_queue *in_tail; }; /** * Struct containing information about a client of the service */ struct Client { /** * Double linked list */ struct Client *next; struct Client *prev; /** * Tunnels that belong to this client, for convenience on disconnect */ struct MESH_tunnel *tunnels_head; struct MESH_tunnel *tunnels_tail; /** * Handle to communicate with the client */ struct GNUNET_SERVER_Client *handle; /** * Messages that this client has declared interest in */ GNUNET_MESH_ApplicationType *messages_subscribed; unsigned int subscription_counter; }; /******************************************************************************/ /*********************** GLOBAL VARIABLES ****************************/ /******************************************************************************/ /** * All the clients */ static struct Client *clients_head; static struct Client *clients_tail; /** * Handle to communicate with core */ static struct GNUNET_CORE_Handle *core_handle; /** * Handle to use DHT */ static struct GNUNET_DHT_Handle *dht_handle; /** * Local peer own ID (memory efficient handle) */ static GNUNET_PEER_Id myid; /******************************************************************************/ /******************** MESH NETWORK HANDLERS **************************/ /******************************************************************************/ /** * Core handler for path creation * struct GNUNET_CORE_MessageHandler * * @param cls closure * @param message message * @param peer peer identity this notification is about * @param atsi performance data * @return GNUNET_OK to keep the connection open, * GNUNET_SYSERR to close it (signal serious error) * */ static int handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer, const struct GNUNET_MessageHeader *message, const struct GNUNET_TRANSPORT_ATS_Information *atsi) { /* Extract path */ /* Find origin & self */ /* Search for origin in local tunnels */ /* Create tunnel / add path */ /* Retransmit to next link in chain, if any (core_notify + callback) */ return GNUNET_OK; } /** * Core handler for mesh network traffic * * @param cls closure * @param message message * @param peer peer identity this notification is about * @param atsi performance data * @return GNUNET_OK to keep the connection open, * GNUNET_SYSERR to close it (signal serious error) */ static int handle_mesh_network_traffic (void *cls, const struct GNUNET_PeerIdentity *peer, const struct GNUNET_MessageHeader *message, const struct GNUNET_TRANSPORT_ATS_Information *atsi) { if(GNUNET_MESSAGE_TYPE_MESH_DATA_GO == ntohs(message->type)) { /* Retransmit to next in path of tunnel identified by message */ return GNUNET_OK; } else { /* GNUNET_MESSAGE_TYPE_MESH_DATA_BACK */ /* Retransmit to previous in path of tunnel identified by message */ return GNUNET_OK; } } /** * Functions to handle messages from core */ static struct GNUNET_CORE_MessageHandler core_handlers[] = { {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0}, {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_GO, 0}, {&handle_mesh_network_traffic, GNUNET_MESSAGE_TYPE_MESH_DATA_BACK, 0}, {NULL, 0, 0} }; /******************************************************************************/ /********************* MESH LOCAL HANDLES **************************/ /******************************************************************************/ /** * Check if client has registered with the service and has not disconnected * @param client the client to check * @return non-NULL if client exists in the global DLL */ struct Client * client_retrieve (struct GNUNET_SERVER_Client *client) { struct Client *c; c = clients_head; while(NULL != c) { if(c->handle == client) return c; if(c == clients_tail) return NULL; else c = c->next; } return NULL; } /** * Handler for client disconnection * * @param cls closure * @param client identification of the client; NULL * for the last call when the server is destroyed */ static void handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client) { struct Client *c, *next; struct MESH_tunnel *t; /* If there are no clients registered, something is wrong... or is it? * FIXME: what happens if a client connects, doesn't send a MESH_Connect * and disconnects? Does the service get a disconnect notification anyway? */ GNUNET_assert(NULL != clients_head); c = clients_head; while(NULL != c) { if (c->handle == client) { GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c); while (NULL != (t = c->tunnels_head)) { GNUNET_CONTAINER_DLL_remove (c->tunnels_head, c->tunnels_tail, t); /* TODO free paths and other tunnel dynamic structures */ GNUNET_free (t); } GNUNET_free (c->messages_subscribed); next = c->next; GNUNET_free (c); c = next; } else { c = c->next; } if(c == clients_head) return; /* Tail already processed? */ } return; } /** * Handler for new clients * * @param cls closure * @param client identification of the client * @param message the actual message, which includes messages the client wants */ static void handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { struct Client *c; unsigned int payload_size; /* Check data sanity */ payload_size = message->size - sizeof(struct GNUNET_MessageHeader); if (0 != payload_size % sizeof(GNUNET_MESH_ApplicationType)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Create new client structure */ c = GNUNET_malloc(sizeof(struct Client)); c->handle = client; c->tunnels_head = NULL; c->tunnels_tail = NULL; if(payload_size != 0) { c->messages_subscribed = GNUNET_malloc(payload_size); memcpy(c->messages_subscribed, &message[1], payload_size); } else { c->messages_subscribed = NULL; } c->subscription_counter = payload_size/sizeof(GNUNET_MESH_ApplicationType); /* Insert new client in DLL */ GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c); GNUNET_SERVER_receive_done(client, GNUNET_OK); } /** * Handler for requests of new tunnels * * @param cls closure * @param client identification of the client * @param message the actual message */ static void handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { struct GNUNET_MESH_TunnelMessage *tunnel_msg; struct MESH_tunnel *t; struct Client *c; /* Sanity check for client registration */ if(NULL == (c = client_retrieve(client))) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Message sanity check */ if(sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message; /* Sanity check for tunnel numbering */ if(0 == (ntohl(tunnel_msg->tunnel_id) & 0x80000000)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Sanity check for duplicate tunnel IDs */ t = c->tunnels_head; while(NULL != t) { if(t->tid == ntohl(tunnel_msg->tunnel_id)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } if(t == c->tunnels_tail) break; t = t->next; } /* FIXME: calloc? Is NULL != 0 on any platform? */ t = GNUNET_malloc(sizeof(struct MESH_tunnel)); t->tid = ntohl(tunnel_msg->tunnel_id); t->oid = myid; t->peers_ready = 0; t->peers_total = 0; t->peers_head = NULL; t->peers_tail = NULL; t->paths_head = NULL; t->paths_tail = NULL; t->in_head = NULL; t->in_tail = NULL; t->out_head = NULL; t->out_tail = NULL; t->client = c; GNUNET_CONTAINER_DLL_insert(c->tunnels_head, c->tunnels_tail, t); GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for requests of deleting tunnels * * @param cls closure * @param client identification of the client * @param message the actual message */ static void handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { struct GNUNET_MESH_TunnelMessage *tunnel_msg; struct Client *c; struct MESH_tunnel *t; MESH_TunnelID tid; struct PeerInfo *pi; /* Sanity check for client registration */ if(NULL == (c = client_retrieve(client))) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Message sanity check */ if(sizeof(struct GNUNET_MESH_TunnelMessage) != ntohs(message->size)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message; /* Tunnel exists? */ tid = ntohl(tunnel_msg->tunnel_id); if(NULL == (t = c->tunnels_head)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } while(NULL != t) { if(t->tid == tid) { break; } if(t == c->tunnels_tail) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } t = t->next; } GNUNET_CONTAINER_DLL_remove(c->tunnels_head, c->tunnels_tail, t); for(pi = t->peers_head; pi != NULL; pi = t->peers_head) { GNUNET_PEER_change_rc(pi->id, -1); GNUNET_CONTAINER_DLL_remove(t->peers_head, t->peers_tail, pi); GNUNET_free(pi); } GNUNET_free(t); GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for connection requests to new peers * * @param cls closure * @param client identification of the client * @param message the actual message (PeerControl) */ static void handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { struct GNUNET_MESH_PeerControl *peer_msg; struct Client *c; struct MESH_tunnel *t; MESH_TunnelID tid; struct PeerInfo *peer_info; /* Sanity check for client registration */ if(NULL == (c = client_retrieve(client))) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } peer_msg = (struct GNUNET_MESH_PeerControl *)message; /* Sanity check for message size */ if(sizeof(struct GNUNET_MESH_PeerControl) != ntohs(peer_msg->header.size)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Tunnel exists? */ tid = ntohl(peer_msg->tunnel_id); if(NULL == (t = c->tunnels_head)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } while(NULL != t) { if(t->tid == tid) { break; } if(t == c->tunnels_tail) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } t = t->next; } /* Does client own tunnel? */ if(t->client->handle != client) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } /* Ok, add peer to tunnel */ peer_info = (struct PeerInfo *) GNUNET_malloc(sizeof(struct PeerInfo)); peer_info->id = GNUNET_PEER_intern(&peer_msg->peer); peer_info->state = MESH_PEER_WAITING; t->peers_total++; GNUNET_CONTAINER_DLL_insert(t->peers_head, t->peers_tail, peer_info); /* TODO MESH SEARCH FOR PEER */ GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for disconnection requests of peers in a tunnel * * @param cls closure * @param client identification of the client * @param message the actual message (PeerControl) */ static void handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { /* Sanity check for client registration */ if(NULL == client_retrieve(client)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for connection requests to new peers by type * * @param cls closure * @param client identification of the client * @param message the actual message (ConnectPeerByType) */ static void handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { /* Sanity check for client registration */ if(NULL == client_retrieve(client)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for client traffic directed to one peer * * @param cls closure * @param client identification of the client * @param message the actual message */ static void handle_local_network_traffic (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { /* Sanity check for client registration */ if(NULL == client_retrieve(client)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Handler for client traffic directed to all peers in a tunnel * * @param cls closure * @param client identification of the client * @param message the actual message */ static void handle_local_network_traffic_bcast (void *cls, struct GNUNET_SERVER_Client *client, const struct GNUNET_MessageHeader *message) { /* Sanity check for client registration */ if(NULL == client_retrieve(client)) { GNUNET_break(0); GNUNET_SERVER_receive_done(client, GNUNET_SYSERR); return; } GNUNET_SERVER_receive_done(client, GNUNET_OK); return; } /** * Functions to handle messages from clients */ static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = { {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0}, {&handle_local_tunnel_create, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE, 0}, {&handle_local_tunnel_destroy, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY, 0}, {&handle_local_connect_add, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_ADD, 0}, {&handle_local_connect_del, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_DEL, 0}, {&handle_local_connect_by_type, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT_PEER_BY_TYPE, sizeof(struct GNUNET_MESH_ConnectPeerByType)}, {&handle_local_network_traffic, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0}, {&handle_local_network_traffic_bcast, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA_BROADCAST, 0}, {NULL, NULL, 0, 0} }; /** * To be called on core init/fail. * * @param cls service closure * @param server handle to the server for this service * @param identity the public identity of this peer * @param publicKey the public key of this peer */ static void core_init (void *cls, struct GNUNET_CORE_Handle *server, const struct GNUNET_PeerIdentity *identity, const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey) { core_handle = server; myid = GNUNET_PEER_intern(identity); return; } /** * Method called whenever a given peer connects. * * @param cls closure * @param peer peer identity this notification is about * @param atsi performance data for the connection */ static void core_connect (void *cls, const struct GNUNET_PeerIdentity *peer, const struct GNUNET_TRANSPORT_ATS_Information *atsi) { return; } /** * Method called whenever a peer disconnects. * * @param cls closure * @param peer peer identity this notification is about */ static void core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer) { return; } /******************************************************************************/ /************************ MAIN FUNCTIONS ****************************/ /******************************************************************************/ /** * Process mesh requests. FIXME NON FUNCTIONAL, SKELETON * * @param cls closure * @param server the initialized server * @param c configuration to use */ static void run (void *cls, struct GNUNET_SERVER_Handle *server, const struct GNUNET_CONFIGURATION_Handle *c) { GNUNET_SERVER_add_handlers (server, plugin_handlers); GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL); core_handle = GNUNET_CORE_connect (c, /* Main configuration */ 32, /* queue size */ NULL, /* Closure passed to MESH functions */ &core_init, /* Call core_init once connected */ &core_connect, /* Handle connects */ &core_disconnect, /* remove peers on disconnects */ NULL, /* Do we care about "status" updates? */ NULL, /* Don't notify about all incoming messages */ GNUNET_NO, /* For header only in notification */ NULL, /* Don't notify about all outbound messages */ GNUNET_NO, /* For header-only out notification */ core_handlers); /* Register these handlers */ if (core_handle == NULL) { GNUNET_break(0); } dht_handle = GNUNET_DHT_connect(c, 100); /* FIXME ht len correct size? */ if (dht_handle == NULL) { GNUNET_break(0); } } /** * The main function for the mesh service. * * @param argc number of arguments from the command line * @param argv command line arguments * @return 0 ok, 1 on error */ int main (int argc, char *const *argv) { int ret; ret = (GNUNET_OK == GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1; return ret; }