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- /*
- This file is part of GNUnet.
- Copyright (C) 2011-2014 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 ats/gnunet-service-ats_scheduling.c
- * @brief ats service, interaction with 'scheduling' API
- * @author Matthias Wachs
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet-service-ats_addresses.h"
- #include "gnunet-service-ats_scheduling.h"
- #include "ats.h"
- /**
- * Context for sending messages to clients.
- */
- static struct GNUNET_SERVER_NotificationContext *nc;
- /**
- * Actual handle to the client.
- */
- static struct GNUNET_SERVER_Client *my_client;
- /**
- * Register a new scheduling client.
- *
- * @param client handle of the new client
- * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
- */
- int
- GAS_scheduling_add_client (struct GNUNET_SERVER_Client *client)
- {
- if (NULL != my_client)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "This ATS already has a scheduling client, refusing new scheduling client for now.\n");
- return GNUNET_SYSERR;
- }
- my_client = client;
- GNUNET_SERVER_notification_context_add (nc,
- client);
- GNUNET_SERVER_client_set_user_context (client,
- &nc);
- return GNUNET_OK;
- }
- /**
- * Unregister a client (which may have been a scheduling client,
- * but this is not assured).
- *
- * @param client handle of the (now dead) client
- */
- void
- GAS_scheduling_remove_client (struct GNUNET_SERVER_Client *client)
- {
- if (my_client != client)
- return;
- GAS_addresses_destroy_all ();
- my_client = NULL;
- }
- /**
- * Transmit the given address suggestion and bandwidth update to all scheduling
- * clients.
- *
- * @param peer peer for which this is an address suggestion
- * @param session_id session ID to use for the given client
- * @param bandwidth_out assigned outbound bandwidth
- * @param bandwidth_in assigned inbound bandwidth
- */
- void
- GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity *peer,
- uint32_t session_id,
- struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
- struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
- {
- struct AddressSuggestionMessage msg;
- if (NULL == my_client)
- return;
- GNUNET_STATISTICS_update (GSA_stats,
- "# address suggestions made",
- 1,
- GNUNET_NO);
- msg.header.size = htons (sizeof (struct AddressSuggestionMessage));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
- msg.peer = *peer;
- msg.session_id = htonl (session_id);
- msg.bandwidth_out = bandwidth_out;
- msg.bandwidth_in = bandwidth_in;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "ATS sends quota for peer `%s': (in/out) %u/%u\n",
- GNUNET_i2s (peer),
- (unsigned int) ntohl (bandwidth_in.value__),
- (unsigned int) ntohl (bandwidth_out.value__));
- GNUNET_SERVER_notification_context_unicast (nc,
- my_client,
- &msg.header,
- GNUNET_YES);
- }
- /**
- * Handle 'address add' messages from clients.
- *
- * @param cls unused, NULL
- * @param client client that sent the request
- * @param message the request message
- */
- void
- GAS_handle_address_add (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
- {
- const struct AddressAddMessage *m;
- const struct GNUNET_ATS_Information *atsi;
- const char *address;
- const char *plugin_name;
- uint16_t address_length;
- uint16_t plugin_name_length;
- uint32_t ats_count;
- uint16_t size;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' message\n",
- "ADDRESS_ADD");
- size = ntohs (message->size);
- if (size < sizeof (struct AddressAddMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- m = (const struct AddressAddMessage *) message;
- ats_count = ntohl (m->ats_count);
- address_length = ntohs (m->address_length);
- plugin_name_length = ntohs (m->plugin_name_length);
- atsi = (const struct GNUNET_ATS_Information *) &m[1];
- address = (const char *) &atsi[ats_count];
- if (plugin_name_length != 0)
- plugin_name = &address[address_length];
- else
- plugin_name = "";
- if ((address_length + plugin_name_length +
- ats_count * sizeof (struct GNUNET_ATS_Information) +
- sizeof (struct AddressAddMessage) != ntohs (message->size)) ||
- (ats_count >
- GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
- ((plugin_name_length > 0) && (plugin_name[plugin_name_length - 1] != '\0')))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_STATISTICS_update (GSA_stats,
- "# addresses created", 1,
- GNUNET_NO);
- GAS_addresses_add (&m->peer,
- plugin_name,
- address,
- address_length,
- ntohl (m->address_local_info),
- ntohl (m->session_id),
- atsi, ats_count);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- }
- /**
- * Handle 'address update' messages from clients.
- *
- * @param cls unused, NULL
- * @param client client that sent the request
- * @param message the request message
- */
- void
- GAS_handle_address_update (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
- {
- const struct AddressUpdateMessage *m;
- const struct GNUNET_ATS_Information *atsi;
- uint32_t ats_count;
- uint16_t size;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' message\n",
- "ADDRESS_UPDATE");
- size = ntohs (message->size);
- if (size < sizeof (struct AddressUpdateMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- m = (const struct AddressUpdateMessage *) message;
- ats_count = ntohl (m->ats_count);
- atsi = (const struct GNUNET_ATS_Information *) &m[1];
- if ((ats_count * sizeof (struct GNUNET_ATS_Information) +
- sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
- (ats_count >
- GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
- GNUNET_STATISTICS_update (GSA_stats,
- "# address updates received",
- 1,
- GNUNET_NO);
- GAS_addresses_update (&m->peer,
- ntohl (m->session_id),
- atsi, ats_count);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- }
- /**
- * Handle 'address destroyed' messages from clients.
- *
- * @param cls unused, NULL
- * @param client client that sent the request
- * @param message the request message
- */
- void
- GAS_handle_address_destroyed (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
- {
- const struct AddressDestroyedMessage *m;
- struct SessionReleaseMessage srm;
- m = (const struct AddressDestroyedMessage *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' message\n",
- "ADDRESS_DESTROYED");
- GNUNET_STATISTICS_update (GSA_stats,
- "# addresses destroyed",
- 1,
- GNUNET_NO);
- GAS_addresses_destroy (&m->peer,
- ntohl (m->session_id));
- srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
- srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
- srm.session_id = m->session_id;
- srm.peer = m->peer;
- GNUNET_SERVER_notification_context_unicast (nc,
- client,
- &srm.header,
- GNUNET_NO);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
- }
- /**
- * Initialize scheduling subsystem.
- *
- * @param server handle to our server
- * @param ah the address handle to use
- */
- void
- GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
- {
- nc = GNUNET_SERVER_notification_context_create (server, 128);
- }
- /**
- * Shutdown scheduling subsystem.
- */
- void
- GAS_scheduling_done ()
- {
- if (NULL != my_client)
- {
- my_client = NULL;
- }
- GNUNET_SERVER_notification_context_destroy (nc);
- nc = NULL;
- }
- /* end of gnunet-service-ats_scheduling.c */
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