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  * @file ats/gnunet-service-ats.c
  22  * @brief ats service
  23  * @author Matthias Wachs
  24  * @author Christian Grothoff
  25  */
  26 #include "platform.h"
  27 #include "gnunet_util_lib.h"
  28 #include "gnunet-service-ats.h"
  29 #include "gnunet-service-ats_addresses.h"
  30 #include "gnunet-service-ats_connectivity.h"
  31 #include "gnunet-service-ats_normalization.h"
  32 #include "gnunet-service-ats_performance.h"
  33 #include "gnunet-service-ats_preferences.h"
  34 #include "gnunet-service-ats_scheduling.h"
  35 #include "gnunet-service-ats_reservations.h"
  36 #include "gnunet-service-ats_plugins.h"
  37 #include "ats.h"
  38
  39 /**
  40  * Handle for statistics.
  41  */
  42 struct GNUNET_STATISTICS_Handle *GSA_stats;
  43
  44 /**
  45  * Handle to the ATS server.
  46  */
  47 static struct GNUNET_SERVER_Handle *GSA_server;
  48
  49
  50 /**
  51  * We have received a `struct ClientStartMessage` from a client.  Find
  52  * out which type of client it is and notify the respective subsystem.
  53  *
  54  * @param cls closure, unused
  55  * @param client handle to the client
  56  * @param message the start message
  57  */
  58 static void
  59 handle_ats_start (void *cls,
  60                   struct GNUNET_SERVER_Client *client,
  61                   const struct GNUNET_MessageHeader *message)
  62 {
  63   const struct ClientStartMessage *msg =
  64       (const struct ClientStartMessage *) message;
  65   enum StartFlag flag;
  66
  67   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
  68               "Received `%s' message\n",
  69               "ATS_START");
  70   flag = ntohl (msg->start_flag);
  71   switch (flag)
  72   {
  73   case START_FLAG_SCHEDULING:
  74     if (GNUNET_OK != GAS_scheduling_add_client (client))
  75     {
  76       GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
  77       return;
  78     }
  79     break;
  80   case START_FLAG_PERFORMANCE_WITH_PIC:
  81     GAS_performance_add_client (client, flag);
  82     break;
  83   case START_FLAG_PERFORMANCE_NO_PIC:
  84     GAS_performance_add_client (client, flag);
  85     break;
  86   case START_FLAG_CONNECTION_SUGGESTION:
  87     /* This client won't receive messages from us, no need to 'add' */
  88     break;
  89   default:
  90     GNUNET_break (0);
  91     GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
  92     return;
  93   }
  94   GNUNET_SERVER_receive_done (client, GNUNET_OK);
  95 }
  96
  97
  98 /**
  99  * A client disconnected from us.  Tear down the local client
 100  * record.
 101  *
 102  * @param cls unused
 103  * @param client handle of the client
 104  */
 105 static void
 106 client_disconnect_handler (void *cls,
 107                            struct GNUNET_SERVER_Client *client)
 108 {
 109   if (NULL == client)
 110     return;
 111   GAS_scheduling_remove_client (client);
 112   GAS_performance_remove_client (client);
 113   GAS_connectivity_remove_client (client);
 114   GAS_normalization_preference_client_disconnect (client);
 115   GAS_addresses_preference_client_disconnect (client);
 116 }
 117
 118
 119 /**
 120  * Task run during shutdown.
 121  *
 122  * @param cls unused
 123  * @param tc unused
 124  */
 125 static void
 126 cleanup_task (void *cls,
 127               const struct GNUNET_SCHEDULER_TaskContext *tc)
 128 {
 129   GAS_plugins_done ();
 130   GAS_addresses_done ();
 131   GAS_normalization_stop ();
 132   GAS_scheduling_done ();
 133   GAS_connectivity_done ();
 134   GAS_performance_done ();
 135   GAS_preference_done ();
 136   GAS_reservations_done ();
 137   GNUNET_SERVER_disconnect_notify_cancel (GSA_server,
 138                                           &client_disconnect_handler,
 139                                           NULL);
 140   if (NULL != GSA_stats)
 141   {
 142     GNUNET_STATISTICS_destroy (GSA_stats, GNUNET_NO);
 143     GSA_stats = NULL;
 144   }
 145 }
 146
 147
 148 /**
 149  * Process template requests.
 150  *
 151  * @param cls closure
 152  * @param server the initialized server
 153  * @param cfg configuration to use
 154  */
 155 static void
 156 run (void *cls,
 157      struct GNUNET_SERVER_Handle *server,
 158      const struct GNUNET_CONFIGURATION_Handle *cfg)
 159 {
 160   static const struct GNUNET_SERVER_MessageHandler handlers[] = {
 161     {&handle_ats_start, NULL,
 162      GNUNET_MESSAGE_TYPE_ATS_START,
 163      sizeof (struct ClientStartMessage)},
 164     {&GAS_handle_request_address, NULL,
 165      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS,
 166      sizeof (struct RequestAddressMessage)},
 167     {&GAS_handle_request_address_cancel, NULL,
 168      GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS_CANCEL,
 169      sizeof (struct RequestAddressMessage)},
 170     {&GAS_handle_request_address_list, NULL,
 171      GNUNET_MESSAGE_TYPE_ATS_ADDRESSLIST_REQUEST,
 172      sizeof (struct AddressListRequestMessage)},
 173     {&GAS_handle_address_add, NULL,
 174      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_ADD, 0},
 175     {&GAS_handle_address_update, NULL,
 176      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_UPDATE, 0},
 177     {&GAS_handle_address_destroyed, NULL,
 178      GNUNET_MESSAGE_TYPE_ATS_ADDRESS_DESTROYED,
 179      sizeof (struct AddressDestroyedMessage) },
 180     {&GAS_handle_reservation_request, NULL,
 181      GNUNET_MESSAGE_TYPE_ATS_RESERVATION_REQUEST,
 182      sizeof (struct ReservationRequestMessage)},
 183     {&GAS_handle_preference_change, NULL,
 184      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_CHANGE, 0},
 185     {&GAS_handle_preference_feedback, NULL,
 186      GNUNET_MESSAGE_TYPE_ATS_PREFERENCE_FEEDBACK, 0},
 187     {NULL, NULL, 0, 0}
 188   };
 189   GSA_server = server;
 190   GSA_stats = GNUNET_STATISTICS_create ("ats", cfg);
 191   GAS_reservations_init ();
 192   GAS_connectivity_init ();
 193   GAS_normalization_start ();
 194   GAS_addresses_init ();
 195   if (GNUNET_OK !=
 196       GAS_plugins_init (cfg))
 197   {
 198     GNUNET_break (0);
 199     GAS_addresses_done ();
 200     GAS_normalization_stop ();
 201     GAS_reservations_done ();
 202     GAS_connectivity_done ();
 203     if (NULL != GSA_stats)
 204     {
 205       GNUNET_STATISTICS_destroy (GSA_stats, GNUNET_NO);
 206       GSA_stats = NULL;
 207     }
 208     return;
 209   }
 210   GAS_performance_init (server);
 211   GAS_scheduling_init (server);
 212
 213   GNUNET_SERVER_disconnect_notify (server,
 214                                    &client_disconnect_handler,
 215                                    NULL);
 216   GNUNET_SERVER_add_handlers (server, handlers);
 217   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
 218                                 &cleanup_task,
 219                                 NULL);
 220 }
 221
 222
 223 /**
 224  * The main function for the ats service.
 225  *
 226  * @param argc number of arguments from the command line
 227  * @param argv command line arguments
 228  * @return 0 ok, 1 on error
 229  */
 230 int
 231 main (int argc, char *const *argv)
 232 {
 233   return (GNUNET_OK ==
 234           GNUNET_SERVICE_run (argc, argv, "ats",
 235                               GNUNET_SERVICE_OPTION_NONE,
 236                               &run, NULL)) ? 0 : 1;
 237 }
 238
 239 /* end of gnunet-service-ats.c */