123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221 |
- /*
- This file is part of GNUnet.
- Copyright (C) 2011-2015 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- 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
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file ats/gnunet-service-ats_connectivity.c
- * @brief ats service, interaction with 'connecivity' API
- * @author Matthias Wachs
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet-service-ats.h"
- #include "gnunet-service-ats_addresses.h"
- #include "gnunet-service-ats_connectivity.h"
- #include "gnunet-service-ats_plugins.h"
- #include "ats.h"
- /**
- * Active connection requests.
- */
- struct ConnectionRequest
- {
- /**
- * Client that made the request.
- */
- struct GNUNET_SERVICE_Client *client;
- /* TODO: allow client to express a 'strength' for this request */
- };
- /**
- * Address suggestion requests by peer.
- */
- static struct GNUNET_CONTAINER_MultiPeerMap *connection_requests;
- /**
- * Is the given peer in the list of peers for which we
- * have an address request?
- *
- * @param cls unused, NULL
- * @param peer peer to query for
- * @return #GNUNET_YES if so, #GNUNET_NO if not
- */
- unsigned int
- GAS_connectivity_has_peer (void *cls,
- const struct GNUNET_PeerIdentity *peer)
- {
- if (NULL == connection_requests)
- return 0;
- /* TODO: return sum of 'strength's of connectivity requests */
- return GNUNET_CONTAINER_multipeermap_contains (connection_requests,
- peer);
- }
- /**
- * Handle #GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS messages from clients.
- *
- * @param client client that sent the request
- * @param message the request message
- */
- void
- GAS_handle_request_address (struct GNUNET_SERVICE_Client *client,
- const struct RequestAddressMessage *msg)
- {
- struct ConnectionRequest *cr;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' message\n",
- "GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS");
- /* FIXME: should not ignore "msg->strength" */
- cr = GNUNET_new (struct ConnectionRequest);
- cr->client = client;
- (void) GNUNET_CONTAINER_multipeermap_put (connection_requests,
- &msg->peer,
- cr,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- GAS_plugin_request_connect_start (&msg->peer);
- }
- /**
- * Free the connection request from the map if the
- * closure matches the client.
- *
- * @param cls the client to match
- * @param pid peer for which the request was made
- * @param value the `struct ConnectionRequest`
- * @return #GNUNET_OK (continue to iterate)
- */
- static int
- free_matching_requests (void *cls,
- const struct GNUNET_PeerIdentity *pid,
- void *value)
- {
- struct GNUNET_SERVICE_Client *client = cls;
- struct ConnectionRequest *cr = value;
- if (cr->client == client)
- {
- GAS_plugin_request_connect_stop (pid);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Removed request pending for peer `%s\n",
- GNUNET_i2s (pid));
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multipeermap_remove (connection_requests,
- pid,
- cr));
- GNUNET_free (cr);
- }
- return GNUNET_OK;
- }
- /**
- * Handle #GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL messages
- * from clients.
- *
- * @param client the client that sent the request
- * @param msg the request message
- */
- void
- GAS_handle_request_address_cancel (struct GNUNET_SERVICE_Client *client,
- const struct RequestAddressMessage *msg)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL message for peer %s\n",
- GNUNET_i2s (&msg->peer));
- GNUNET_break (0 == ntohl (msg->strength));
- GNUNET_CONTAINER_multipeermap_get_multiple (connection_requests,
- &msg->peer,
- &free_matching_requests,
- client);
- }
- /**
- * Unregister a client (which may have been a connectivity client,
- * but this is not assured).
- *
- * @param client handle of the (now dead) client
- */
- void
- GAS_connectivity_remove_client (struct GNUNET_SERVICE_Client *client)
- {
- GNUNET_CONTAINER_multipeermap_iterate (connection_requests,
- &free_matching_requests,
- client);
- }
- /**
- * Shutdown connectivity subsystem.
- */
- void
- GAS_connectivity_init ()
- {
- connection_requests
- = GNUNET_CONTAINER_multipeermap_create (32,
- GNUNET_NO);
- }
- /**
- * Free the connection request from the map.
- *
- * @param cls NULL
- * @param pid peer for which the request was made
- * @param value the `struct ConnectionRequest`
- * @return #GNUNET_OK (continue to iterate)
- */
- static int
- free_request (void *cls,
- const struct GNUNET_PeerIdentity *pid,
- void *value)
- {
- struct ConnectionRequest *cr = value;
- free_matching_requests (cr->client,
- pid,
- cr);
- return GNUNET_OK;
- }
- /**
- * Shutdown connectivity subsystem.
- */
- void
- GAS_connectivity_done ()
- {
- GAS_plugin_solver_lock ();
- GNUNET_CONTAINER_multipeermap_iterate (connection_requests,
- &free_request,
- NULL);
- GAS_plugin_solver_unlock ();
- GNUNET_CONTAINER_multipeermap_destroy (connection_requests);
- connection_requests = NULL;
- }
- /* end of gnunet-service-ats_connectivity.c */
|