src/ats/gnunet-service-ats_addresses.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_addresses.c
  23  * @brief ats service address management
  24  * @author Matthias Wachs
  25  * @author Christian Grothoff
  26  */
  27 #include "platform.h"
  28 #include "gnunet-service-ats_addresses.h"
  29 #include "gnunet-service-ats_performance.h"
  30 #include "gnunet-service-ats_scheduling.h"
  31 #include "gnunet-service-ats_reservations.h"
  32
  33 struct ATS_Address
  34 {
  35   struct GNUNET_PeerIdentity peer;
  36
  37   size_t addr_len;
  38
  39   struct GNUNET_SERVER_Client *session_client;
  40
  41   uint32_t session_id;
  42
  43   uint32_t ats_count;
  44
  45   const void * addr;
  46
  47   char * plugin;
  48
  49   struct GNUNET_TRANSPORT_ATS_Information * ats;
  50
  51   struct GNUNET_BANDWIDTH_Value32NBO bw_in;
  52
  53   struct GNUNET_BANDWIDTH_Value32NBO bw_out;
  54
  55 };
  56
  57
  58 static struct GNUNET_CONTAINER_MultiHashMap * addresses;
  59
  60 static unsigned long long total_quota_in;
  61
  62 static unsigned long long total_quota_out;
  63
  64 static unsigned int active_addr_count;
  65
  66
  67 struct CompareAddressContext
  68 {
  69   struct ATS_Address * search;
  70   struct ATS_Address * result;
  71 };
  72
  73
  74 static void
  75 destroy_address (struct ATS_Address *addr)
  76 {
  77   GNUNET_assert (GNUNET_YES ==
  78                  GNUNET_CONTAINER_multihashmap_remove(addresses,
  79                                                       &addr->peer.hashPubKey,
  80                                                       addr));
  81   if (ntohl (addr->bw_in.value__) > 0)
  82   {
  83     active_addr_count--;
  84     // FIXME: update address assignment for other peers...
  85   }
  86   GNUNET_free_non_null (addr->ats);
  87   GNUNET_free (addr->plugin);
  88   GNUNET_free (addr);
  89 }
  90
  91
  92 static int
  93 compare_address_it (void *cls,
  94                     const GNUNET_HashCode * key,
  95                     void *value)
  96 {
  97   struct CompareAddressContext * cac = cls;
  98   struct ATS_Address * aa = (struct ATS_Address *) value;
  99
 100   /* compare sessions */
 101   if ((aa->session_client != cac->search->session_client) ||
 102       (aa->session_id != cac->search->session_id))
 103     return GNUNET_YES;
 104
 105   if (aa->addr_len != cac->search->addr_len)
 106   {
 107     return GNUNET_YES;
 108   }
 109
 110   if (0 == strcmp(aa->plugin, cac->search->plugin))
 111   {
 112     return GNUNET_YES;
 113   }
 114
 115   if (0 == memcmp (aa->addr, cac->search->addr, aa->addr_len))
 116   {
 117     cac->result = aa;
 118     return GNUNET_NO;
 119   }
 120   return GNUNET_YES;
 121 }
 122
 123
 124 struct ATS_Address *
 125 find_address (const struct GNUNET_PeerIdentity *peer,
 126               struct ATS_Address * addr)
 127 {
 128   struct CompareAddressContext cac;
 129   cac.result = NULL;
 130   cac.search = addr;
 131
 132   GNUNET_CONTAINER_multihashmap_get_multiple(addresses,
 133          &peer->hashPubKey,
 134          compare_address_it,
 135          &cac);
 136
 137   return cac.result;
 138 }
 139
 140
 141 void
 142 GAS_address_update (const struct GNUNET_PeerIdentity *peer,
 143                     const char *plugin_name,
 144                     const void *plugin_addr, size_t plugin_addr_len,
 145                     struct GNUNET_SERVER_Client *session_client,
 146                     uint32_t session_id,
 147                     const struct GNUNET_TRANSPORT_ATS_Information *atsi,
 148                     uint32_t atsi_count)
 149 {
 150   struct ATS_Address * aa;
 151   struct ATS_Address * old;
 152
 153   aa = GNUNET_malloc (sizeof (struct ATS_Address) + plugin_addr_len);
 154   aa->ats = GNUNET_malloc(atsi_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
 155   aa->peer = *peer;
 156   aa->addr_len = plugin_addr_len;
 157   aa->ats_count = atsi_count;
 158   memcpy (aa->ats, atsi, atsi_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
 159   aa->addr = &aa[1];
 160   memcpy (&aa[1], plugin_addr, plugin_addr_len);
 161   aa->plugin = GNUNET_strdup (plugin_name);
 162   aa->session_client = session_client;
 163   aa->session_id = session_id;
 164   old = find_address (peer, aa);
 165   if (old == NULL)
 166   {
 167     GNUNET_assert (GNUNET_OK ==
 168                    GNUNET_CONTAINER_multihashmap_put (addresses,
 169                                                       &peer->hashPubKey,
 170                                                       aa,
 171                                                       GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
 172     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 173                 "Added new address for peer `%s' %X\n",
 174                 GNUNET_i2s (peer), aa);
 175     return;
 176   }
 177   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 178               "Updated existing address for peer `%s' %X \n",
 179               GNUNET_i2s (peer), old);
 180   GNUNET_free_non_null (old->ats);
 181   old->ats = NULL;
 182   old->ats_count = 0;
 183   old->ats = aa->ats;
 184   old->ats_count = aa->ats_count;
 185   GNUNET_free (aa->plugin);
 186   GNUNET_free (aa);
 187 }
 188
 189
 190 static int
 191 remove_address_by_client (void *cls,
 192                           const GNUNET_HashCode * key,
 193                           void *value)
 194 {
 195   struct GNUNET_SERVER_Client *client = cls;
 196   struct ATS_Address * aa = value;
 197
 198   if (aa->session_client == client)
 199     destroy_address (aa);
 200   return GNUNET_OK;
 201 }
 202
 203
 204 void
 205 GAS_address_client_disconnected (struct GNUNET_SERVER_Client *client)
 206 {
 207   if (addresses != NULL)
 208     GNUNET_CONTAINER_multihashmap_iterate(addresses,
 209                                           &remove_address_by_client, client);
 210 }
 211
 212
 213 void
 214 GAS_address_destroyed (const struct GNUNET_PeerIdentity *peer,
 215                        const char *plugin_name,
 216                        const void *plugin_addr, size_t plugin_addr_len,
 217                        struct GNUNET_SERVER_Client *session_client,
 218                        uint32_t session_id)
 219 {
 220
 221   struct ATS_Address aa;
 222   struct ATS_Address *res;
 223
 224   aa.peer = *peer;
 225   aa.addr_len = plugin_addr_len;
 226   aa.addr = plugin_addr;
 227   aa.plugin = (char*) plugin_name;
 228   aa.session_client = session_client;
 229   aa.session_id = session_id;
 230
 231   res = find_address (peer, &aa);
 232   if (res == NULL)
 233   {
 234     /* we don't even know this one, can this happen? */
 235     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 236                 "Asked to delete unknown address for peer `%s'\n",
 237                 GNUNET_i2s (peer));
 238     return;
 239   }
 240   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 241               "Deleting address for peer `%s': `%s'\n",
 242               GNUNET_i2s (peer), plugin_name);
 243   destroy_address (res);
 244 }
 245
 246
 247 void
 248 GAS_addresses_request_address (const struct GNUNET_PeerIdentity *peer)
 249 {
 250   struct ATS_Address * aa;
 251
 252   aa = GNUNET_CONTAINER_multihashmap_get (addresses, &peer->hashPubKey);
 253   if (aa == NULL)
 254   {
 255     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 256                 "Cannot suggest address for peer `%s'\n",
 257                 GNUNET_i2s (peer));
 258     return;
 259   }
 260   /* FIXME: ensure that we don't do this multiple times per peer! */
 261   if (ntohl (aa->bw_in.value__) == 0)
 262   {
 263     active_addr_count++;
 264     aa->bw_in.value__ = htonl (total_quota_in / active_addr_count);
 265     aa->bw_out.value__ = htonl (total_quota_out / active_addr_count);
 266     /* FIXME: update bw assignments for other addresses... */
 267   }
 268   GAS_reservations_set_bandwidth (peer,
 269                                   aa->bw_in);
 270   GAS_scheduling_transmit_address_suggestion (peer, aa->plugin,
 271                                               aa->addr, aa->addr_len,
 272                                               aa->session_client, aa->session_id,
 273                                               aa->ats, aa->ats_count,
 274                                               aa->bw_out, aa->bw_in);
 275   GAS_performance_notify_clients (peer, aa->plugin,
 276                                   aa->addr, aa->addr_len,
 277                                   aa->ats, aa->ats_count,
 278                                   aa->bw_out, aa->bw_in);
 279 }
 280
 281
 282 // FIXME: this function should likely end up in the LP-subsystem and
 283 // not with 'addresses' in the future...
 284 void
 285 GAS_addresses_change_preference (const struct GNUNET_PeerIdentity *peer,
 286                                  enum GNUNET_ATS_PreferenceKind kind,
 287                                  float score)
 288 {
 289   // do nothing for now...
 290 }
 291
 292
 293 /**
 294  * Initialize address subsystem.
 295  *
 296  * @param cfg configuration to use
 297  */
 298 void
 299 GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg)
 300 {
 301   GNUNET_assert (GNUNET_OK ==
 302                  GNUNET_CONFIGURATION_get_value_number (cfg,
 303                                                         "core",
 304                                                         "TOTAL_QUOTA_IN",
 305                                                         &total_quota_in));
 306   GNUNET_assert (GNUNET_OK ==
 307                  GNUNET_CONFIGURATION_get_value_number (cfg,
 308                                                         "core",
 309                                                         "TOTAL_QUOTA_OUT",
 310                                                         &total_quota_out));
 311   addresses = GNUNET_CONTAINER_multihashmap_create(128);
 312 }
 313
 314
 315 /**
 316  * Free memory of address.
 317  *
 318  * @param cls NULL
 319  * @param key peer identity (unused)
 320  * @param value the 'struct ATS_Address' to free
 321  * @return GNUNET_OK (continue to iterate)
 322  */
 323 static int
 324 free_address_it (void *cls,
 325                  const GNUNET_HashCode * key,
 326                  void *value)
 327 {
 328   struct ATS_Address * aa = value;
 329
 330   destroy_address (aa);
 331   return GNUNET_OK;
 332 }
 333
 334
 335 /**
 336  * Shutdown address subsystem.
 337  */
 338 void
 339 GAS_addresses_done ()
 340 {
 341   GNUNET_CONTAINER_multihashmap_iterate (addresses, &free_address_it, NULL);
 342   GNUNET_CONTAINER_multihashmap_destroy (addresses);
 343   addresses = NULL;
 344 }
 345
 346
 347 /* end of gnunet-service-ats_addresses.c */