/* This file is part of GNUnet. (C) 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/mesh_api_new.c * @brief mesh api: client implementation of mesh service * @author Bartlomiej Polot */ #ifdef __cplusplus extern "C" { #if 0 /* keep Emacsens' auto-indent happy */ } #endif #endif #include "platform.h" #include "gnunet_common.h" #include "gnunet_client_lib.h" #include "gnunet_util_lib.h" #include "gnunet_mesh_service_new.h" #include "mesh.h" /** * Opaque handle to the service. */ struct GNUNET_MESH_Handle { struct GNUNET_CLIENT_Connection *mesh; struct GNUNET_MESH_MessageHandler *message_handlers; GNUNET_MESH_ApplicationType *applications; struct GNUNET_MESH_Tunnel *head; struct GNUNET_MESH_Tunnel *tail; GNUNET_MESH_TunnelEndHandler *cleaner; void *cls; }; /** * Opaque handle to a tunnel. */ struct GNUNET_MESH_Tunnel { GNUNET_PEER_Id owner; GNUNET_PEER_Id destination; GNUNET_MESH_TunnelConnectHandler connect_handler; GNUNET_MESH_TunnelDisconnectHandler disconnect_handler; GNUNET_PEER_Id *peers; void *cls; }; /** * Function called to notify a client about the socket * begin ready to queue more data. "buf" will be * NULL and "size" zero if the socket was closed for * writing in the meantime. * * @param cls closure * @param size number of bytes available in buf * @param buf where the callee should write the message * @return number of bytes written to buf */ size_t send_connect_packet (void *cls, size_t size, void *buf) { struct GNUNET_MESH_Handle *h; struct GNUNET_MESH_ClientConnect *msg; int *types; int ntypes; int *applications; int napplications; msg = (struct GNUNET_MESH_ClientConnect *) buf; h = (struct GNUNET_MESH_Handle *) cls; msg->header.type = GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT; for(ntypes = 0, types = NULL; h->message_handlers[ntypes].type; ntypes++) { types = GNUNET_realloc(types, sizeof(uint16_t) * (ntypes + 1)); types[ntypes] = h->message_handlers[ntypes].type; } msg->header.size = sizeof(struct GNUNET_MESH_ClientConnect) + sizeof(uint16_t) * ntypes + sizeof(GNUNET_MESH_ApplicationType) * napplications; } /** * Connect to the mesh service. * * @param cfg configuration to use * @param cls closure for the various callbacks that follow * (including handlers in the handlers array) * @param cleaner function called when an *inbound* tunnel is destroyed * @param handlers callbacks for messages we care about, NULL-terminated * note that the mesh is allowed to drop notifications about * inbound messages if the client does not process them fast * enough (for this notification type, a bounded queue is used) * @param stypes Application Types the client claims to offer * @return handle to the mesh service * NULL on error (in this case, init is never called) */ struct GNUNET_MESH_Handle * GNUNET_MESH_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_MESH_TunnelEndHandler cleaner, const struct GNUNET_MESH_MessageHandler *handlers, const GNUNET_MESH_ApplicationType *stypes) { struct GNUNET_MESH_Handle *h; int i; uint16_t *types; h = GNUNET_malloc(sizeof(struct GNUNET_MESH_Handle)); h->cleaner = cleaner; h->mesh = GNUNET_CLIENT_connect("mesh", cfg); h->cls = cls; h->message_handlers = handlers; h->applications = h->applications; GNUNET_CLIENT_notify_transmit_ready(h->mesh, sizeof(int), GNUNET_TIME_relative_get_forever(), GNUNET_YES, &send_connect_packet, (void *)h ); return h; } /** * Disconnect from the mesh service. * * @param handle connection to mesh to disconnect */ void GNUNET_MESH_disconnect (struct GNUNET_MESH_Handle *handle) { GNUNET_free(handle); return; } /** * Create a new tunnel (we're initiator and will be allowed to add/remove peers * and to broadcast). * * @param h mesh handle * @param connect_handler function to call when peers are actually connected * @param disconnect_handler function to call when peers are disconnected * @param handler_cls closure for connect/disconnect handlers */ struct GNUNET_MESH_Tunnel * GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h, GNUNET_MESH_TunnelConnectHandler connect_handler, GNUNET_MESH_TunnelDisconnectHandler disconnect_handler, void *handler_cls) { struct GNUNET_MESH_Tunnel *tunnel; tunnel = GNUNET_malloc(sizeof(struct GNUNET_MESH_Tunnel)); tunnel->connect_handler = connect_handler; tunnel->disconnect_handler = disconnect_handler; tunnel->peers = NULL; tunnel->cls = handler_cls; return tunnel; } /** * Request that a peer should be added to the tunnel. The existing * connect handler will be called ONCE with either success or failure. * * @param tunnel handle to existing tunnel * @param timeout how long to try to establish a connection * @param peer peer to add */ void GNUNET_MESH_peer_request_connect_add (struct GNUNET_MESH_Tunnel *tunnel, struct GNUNET_TIME_Relative timeout, const struct GNUNET_PeerIdentity *peer) { static GNUNET_PEER_Id peer_id; peer_id = GNUNET_PEER_intern(peer); /* FIXME ACTUALLY DO STUFF */ tunnel->peers = &peer; tunnel->connect_handler(tunnel->cls, peer, NULL); return; } /** * Request that a peer should be removed from the tunnel. The existing * disconnect handler will be called ONCE if we were connected. * * @param tunnel handle to existing tunnel * @param peer peer to remove */ void GNUNET_MESH_peer_request_connect_del (struct GNUNET_MESH_Tunnel *tunnel, const struct GNUNET_PeerIdentity *peer) { /* FIXME ACTUALLY DO STUFF */ tunnel->peers = NULL; tunnel->disconnect_handler(tunnel->cls, peer); return; } /** * Request that the mesh should try to connect to a peer supporting the given * message type. * * @param tunnel handle to existing tunnel * @param timeout how long to try to establish a connection * @param app_type application type that must be supported by the peer (MESH * should discover peer in proximity handling this type) */ void GNUNET_MESH_peer_request_connect_by_type (struct GNUNET_MESH_Tunnel *tunnel, struct GNUNET_TIME_Relative timeout, GNUNET_MESH_ApplicationType app_type) { return; } /** * Ask the mesh to call "notify" once it is ready to transmit the * given number of bytes to the specified "target". If we are not yet * connected to the specified peer, a call to this function will cause * us to try to establish a connection. * * @param tunnel tunnel to use for transmission * @param cork is corking allowed for this transmission? * @param priority how important is the message? * @param maxdelay how long can the message wait? * @param target destination for the message, * NULL for multicast to all tunnel targets * @param notify_size how many bytes of buffer space does notify want? * @param notify function to call when buffer space is available; * will be called with NULL on timeout or if the overall queue * for this peer is larger than queue_size and this is currently * the message with the lowest priority * @param notify_cls closure for notify * @return non-NULL if the notify callback was queued, * NULL if we can not even queue the request (insufficient * memory); if NULL is returned, "notify" will NOT be called. */ struct GNUNET_MESH_TransmitHandle * GNUNET_MESH_notify_transmit_ready (struct GNUNET_MESH_Tunnel *tunnel, int cork, uint32_t priority, struct GNUNET_TIME_Relative maxdelay, const struct GNUNET_PeerIdentity *target, size_t notify_size, GNUNET_CONNECTION_TransmitReadyNotify notify, void *notify_cls) { struct GNUNET_MESH_Handle *handle; handle = GNUNET_malloc(sizeof(struct GNUNET_MESH_Handle)); return handle; } #if 0 /* keep Emacsens' auto-indent happy */ { #endif #ifdef __cplusplus } #endif