src/ats/gnunet-service-ats.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 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 ats/gnunet-service-ats.c
  23  * @brief ats service
  24  * @author Matthias Wachs
  25  * @author Christian Grothoff
  26  */
  27 #include "platform.h"
  28 #include "gnunet_util_lib.h"
  29 #include "gnunet-service-ats.h"
  30 #include "gnunet-service-ats_addresses.h"
  31 #include "gnunet-service-ats_performance.h"
  32 #include "gnunet-service-ats_scheduling.h"
  33 #include "gnunet-service-ats_reservations.h"
  34 #include "ats.h"
  35
  36 /**
  37  * Handle for statistics.
  38  */
  39 struct GNUNET_STATISTICS_Handle *GSA_stats;
  40
  41 /**
  42  * Handle to the ATS server.
  43  */
  44 static struct GNUNET_SERVER_Handle *GSA_server;
  45
  46 /**
  47  * Handle to the address state.
  48  */
  49 static struct GAS_Addresses_Handle *GSA_addresses;
  50
  51
  52 /**
  53  * We have received a `struct ClientStartMessage` from a client.  Find
  54  * out which type of client it is and notify the respective subsystem.
  55  *
  56  * @param cls closure, unused
  57  * @param client handle to the client
  58  * @param message the start message
  59  */
  60 static void
  61 handle_ats_start (void *cls,
  62                   struct GNUNET_SERVER_Client *client,
  63                   const struct GNUNET_MessageHeader *message)
  64 {
  65   const struct ClientStartMessage *msg =
  66       (const struct ClientStartMessage *) message;
  67   enum StartFlag flag;
  68
  69   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
  70               "Received `%s' message\n",
  71               "ATS_START");
  72   flag = ntohl (msg->start_flag);
  73   switch (flag)
  74   {
  75   case START_FLAG_SCHEDULING:
  76     if (GNUNET_OK != GAS_scheduling_add_client (client))
  77     {
  78       GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
  79       return;
  80     }
  81     break;
  82   case START_FLAG_PERFORMANCE_WITH_PIC:
  83     GAS_performance_add_client (client, flag);
  84     break;
  85   case START_FLAG_PERFORMANCE_NO_PIC:
  86     GAS_performance_add_client (client, flag);
  87     break;
  88   default:
  89     GNUNET_break (0);
  90     GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
  91     return;
  92   }
  93   GNUNET_SERVER_receive_done (client, GNUNET_OK);
  94 }
  95
  96
  97 /**
  98  * A client disconnected from us.  Tear down the local client
  99  * record.
 100  *
 101  * @param cls unused
 102  * @param client handle of the client
 103  */
 104 static void
 105 client_disconnect_handler (void *cls,
 106                            struct GNUNET_SERVER_Client *client)
 107 {
 108   if (NULL == client)
 109     return;
 110   GAS_scheduling_remove_client (client);
 111   GAS_performance_remove_client (client);
 112 }
 113
 114
 115 /**
 116  * Task run during shutdown.
 117  *
 118  * @param cls unused
 119  * @param tc unused
 120  */
 121 static void
 122 cleanup_task (void *cls,
 123               const struct GNUNET_SCHEDULER_TaskContext *tc)
 124 {
 125   GAS_addresses_done (GSA_addresses);
 126   GAS_scheduling_done ();
 127   GAS_performance_done ();
 128   GAS_reservations_done ();
 129   GNUNET_SERVER_disconnect_notify_cancel (GSA_server,
 130                                           &client_disconnect_handler,
 131                                           NULL);
 132   if (NULL != GSA_stats)
 133   {
 134     GNUNET_STATISTICS_destroy (GSA_stats, GNUNET_NO);
 135     GSA_stats = NULL;
 136   }
 137 }
 138
 139
 140 /**
 141  * Process template requests.
 142  *
 143  * @param cls closure
 144  * @param server the initialized server
 145  * @param cfg configuration to use
 146  */
 147 static void
 148 run (void *cls,
 149      struct GNUNET_SERVER_Handle *server,
 150      const struct GNUNET_CONFIGURATION_Handle *cfg)
 151 {
 152   static const struct GNUNET_SERVER_MessageHandler handlers[] = {
 153     {&handle_ats_start, NULL,
 154      GNUNET_MESSAGE_TYPE_ATS_START,
 155      sizeof (struct ClientStartMessage)},
 156     {&GAS_handle_request_address, NULL,
 157      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS,
 158      sizeof (struct RequestAddressMessage)},
 159     {&GAS_handle_request_address_cancel, NULL,
 160      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL,
 161      sizeof (struct RequestAddressMessage)},
 162     {&GAS_handle_request_address_list, NULL,
 163      GNUNET_MESSAGE_TYPE_ATS_ADDRESSLIST_REQUEST,
 164      sizeof (struct AddressListRequestMessage)},
 165     {&GAS_handle_address_add, NULL,
 166      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_ADD, 0},
 167     {&GAS_handle_address_update, NULL,
 168      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_UPDATE, 0},
 169     {&GAS_handle_address_in_use, NULL,
 170      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_IN_USE,
 171      sizeof (struct AddressUseMessage) },
 172     {&GAS_handle_address_destroyed, NULL,
 173      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_DESTROYED,
 174      sizeof (struct AddressDestroyedMessage) },
 175     {&GAS_handle_reservation_request, NULL,
 176      GNUNET_MESSAGE_TYPE_ATS_RESERVATION_REQUEST,
 177      sizeof (struct ReservationRequestMessage)},
 178     {&GAS_handle_preference_change, NULL,
 179      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_CHANGE, 0},
 180     {&GAS_handle_preference_feedback, NULL,
 181      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_FEEDBACK, 0},
 182     {&GAS_handle_reset_backoff, NULL,
 183      GNUNET_MESSAGE_TYPE_ATS_RESET_BACKOFF,
 184      sizeof (struct ResetBackoffMessage)},
 185     {NULL, NULL, 0, 0}
 186   };
 187   GSA_server = server;
 188   GSA_stats = GNUNET_STATISTICS_create ("ats", cfg);
 189   GAS_reservations_init ();
 190   GSA_addresses = GAS_addresses_init (cfg, GSA_stats);
 191   GAS_performance_init (server, GSA_addresses);
 192   GAS_scheduling_init (server, GSA_addresses);
 193
 194   GNUNET_SERVER_disconnect_notify (server,
 195                                    &client_disconnect_handler, NULL);
 196   GNUNET_SERVER_add_handlers (server, handlers);
 197   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
 198                                 &cleanup_task, NULL);
 199 }
 200
 201
 202 /**
 203  * The main function for the ats service.
 204  *
 205  * @param argc number of arguments from the command line
 206  * @param argv command line arguments
 207  * @return 0 ok, 1 on error
 208  */
 209 int
 210 main (int argc, char *const *argv)
 211 {
 212   return (GNUNET_OK ==
 213           GNUNET_SERVICE_run (argc, argv, "ats",
 214                               GNUNET_SERVICE_OPTION_NONE,
 215                               &run, NULL)) ? 0 : 1;
 216 }
 217
 218 /* end of gnunet-service-ats.c */