src/counter.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <gdbus.h>
  27
  28 #include "connman.h"
  29
  30 static DBusConnection *connection;
  31
  32 static GHashTable *stats_table;
  33 static GHashTable *counter_table;
  34 static GHashTable *owner_mapping;
  35
  36 struct connman_counter {
  37         char *owner;
  38         char *path;
  39         unsigned int interval;
  40         guint watch;
  41 };
  42
  43 struct counter_data {
  44         struct connman_service *service;
  45         connman_bool_t first_update;
  46 };
  47
  48 static void remove_counter(gpointer user_data)
  49 {
  50         struct connman_counter *counter = user_data;
  51
  52         DBG("owner %s path %s", counter->owner, counter->path);
  53
  54         if (counter->watch > 0)
  55                 g_dbus_remove_watch(connection, counter->watch);
  56
  57         __connman_rtnl_update_interval_remove(counter->interval);
  58
  59         g_free(counter->owner);
  60         g_free(counter->path);
  61         g_free(counter);
  62 }
  63
  64 static void remove_data(gpointer user_data)
  65 {
  66         struct counter_data *data = user_data;
  67
  68         g_free(data);
  69 }
  70
  71 static void owner_disconnect(DBusConnection *connection, void *user_data)
  72 {
  73         struct connman_counter *counter = user_data;
  74
  75         DBG("owner %s path %s", counter->owner, counter->path);
  76
  77         g_hash_table_remove(owner_mapping, counter->owner);
  78         g_hash_table_remove(counter_table, counter->path);
  79 }
  80
  81 int __connman_counter_register(const char *owner, const char *path,
  82                                                 unsigned int interval)
  83 {
  84         struct connman_counter *counter;
  85
  86         DBG("owner %s path %s interval %u", owner, path, interval);
  87
  88         counter = g_hash_table_lookup(counter_table, path);
  89         if (counter != NULL)
  90                 return -EEXIST;
  91
  92         counter = g_try_new0(struct connman_counter, 1);
  93         if (counter == NULL)
  94                 return -ENOMEM;
  95
  96         counter->owner = g_strdup(owner);
  97         counter->path = g_strdup(path);
  98
  99         g_hash_table_replace(counter_table, counter->path, counter);
 100         g_hash_table_replace(owner_mapping, counter->owner, counter);
 101
 102         counter->interval = interval;
 103         __connman_rtnl_update_interval_add(counter->interval);
 104
 105         counter->watch = g_dbus_add_disconnect_watch(connection, owner,
 106                                         owner_disconnect, counter, NULL);
 107
 108         return 0;
 109 }
 110
 111 int __connman_counter_unregister(const char *owner, const char *path)
 112 {
 113         struct connman_counter *counter;
 114
 115         DBG("owner %s path %s", owner, path);
 116
 117         counter = g_hash_table_lookup(counter_table, path);
 118         if (counter == NULL)
 119                 return -ESRCH;
 120
 121         if (g_strcmp0(owner, counter->owner) != 0)
 122                 return -EACCES;
 123
 124         g_hash_table_remove(owner_mapping, counter->owner);
 125         g_hash_table_remove(counter_table, counter->path);
 126
 127         return 0;
 128 }
 129
 130 static void send_usage(struct connman_counter *counter,
 131                                 struct connman_service *service)
 132 {
 133         DBusMessage *message;
 134         DBusMessageIter array, dict;
 135         const char *service_path;
 136         unsigned long rx_bytes;
 137         unsigned long tx_bytes;
 138         unsigned long time;
 139
 140         message = dbus_message_new_method_call(counter->owner, counter->path,
 141                                         CONNMAN_COUNTER_INTERFACE, "Usage");
 142         if (message == NULL)
 143                 return;
 144
 145         dbus_message_set_no_reply(message, TRUE);
 146
 147         service_path = __connman_service_get_path(service);
 148         dbus_message_append_args(message, DBUS_TYPE_OBJECT_PATH,
 149                                         &service_path, DBUS_TYPE_INVALID);
 150
 151         dbus_message_iter_init_append(message, &array);
 152
 153         connman_dbus_dict_open(&array, &dict);
 154
 155         rx_bytes = __connman_service_stats_get_rx_bytes(service);
 156         tx_bytes = __connman_service_stats_get_tx_bytes(service);
 157         time = __connman_service_stats_get_time(service);
 158
 159         connman_dbus_dict_append_basic(&dict, "RX.Bytes", DBUS_TYPE_UINT32,
 160                                 &rx_bytes);
 161         connman_dbus_dict_append_basic(&dict, "TX.Bytes", DBUS_TYPE_UINT32,
 162                                 &tx_bytes);
 163         connman_dbus_dict_append_basic(&dict, "Time", DBUS_TYPE_UINT32,
 164                                 &time);
 165
 166         connman_dbus_dict_close(&array, &dict);
 167
 168         g_dbus_send_message(connection, message);
 169 }
 170
 171 void __connman_counter_notify(struct connman_ipconfig *config,
 172                                 unsigned int rx_bytes, unsigned int tx_bytes)
 173 {
 174         struct counter_data *data;
 175         GHashTableIter iter;
 176         gpointer key, value;
 177
 178         data = g_hash_table_lookup(stats_table, config);
 179         if (data == NULL)
 180                 return;
 181
 182         __connman_service_stats_update(data->service, rx_bytes, tx_bytes);
 183
 184         if (data->first_update == TRUE) {
 185                 data->first_update = FALSE;
 186                 return;
 187         }
 188
 189         g_hash_table_iter_init(&iter, counter_table);
 190         while (g_hash_table_iter_next(&iter, &key, &value) == TRUE) {
 191                 struct connman_counter *counter = value;
 192
 193                 send_usage(counter, data->service);
 194         }
 195 }
 196
 197 static void release_counter(gpointer key, gpointer value, gpointer user_data)
 198 {
 199         struct connman_counter *counter = value;
 200         DBusMessage *message;
 201
 202         DBG("owner %s path %s", counter->owner, counter->path);
 203
 204         message = dbus_message_new_method_call(counter->owner, counter->path,
 205                                         CONNMAN_COUNTER_INTERFACE, "Release");
 206         if (message == NULL)
 207                 return;
 208
 209         dbus_message_set_no_reply(message, TRUE);
 210
 211         g_dbus_send_message(connection, message);
 212 }
 213
 214 int __connman_counter_add_service(struct connman_service *service)
 215 {
 216         struct connman_ipconfig *config;
 217         struct counter_data *data;
 218
 219         data = g_try_new0(struct counter_data, 1);
 220         if (data == NULL)
 221                 return -ENOMEM;
 222
 223         data->service = service;
 224         data->first_update = TRUE;
 225
 226         config = __connman_service_get_ipconfig(service);
 227         g_hash_table_replace(stats_table, config, data);
 228
 229         /*
 230          * Trigger a first update to intialize the offset counters
 231          * in the service.
 232          */
 233         __connman_rtnl_request_update();
 234
 235         return 0;
 236 }
 237
 238 void __connman_counter_remove_service(struct connman_service *service)
 239 {
 240         struct connman_ipconfig *config;
 241
 242         config = __connman_service_get_ipconfig(service);
 243         g_hash_table_remove(stats_table, config);
 244 }
 245
 246 int __connman_counter_init(void)
 247 {
 248         DBG("");
 249
 250         connection = connman_dbus_get_connection();
 251         if (connection == NULL)
 252                 return -1;
 253
 254         stats_table = g_hash_table_new_full(g_direct_hash, g_str_equal,
 255                                                         NULL, remove_data);
 256
 257         counter_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 258                                                         NULL, remove_counter);
 259         owner_mapping = g_hash_table_new_full(g_str_hash, g_str_equal,
 260                                                                 NULL, NULL);
 261
 262         return 0;
 263 }
 264
 265 void __connman_counter_cleanup(void)
 266 {
 267         DBG("");
 268
 269         if (connection == NULL)
 270                 return;
 271
 272         g_hash_table_foreach(counter_table, release_counter, NULL);
 273
 274         g_hash_table_destroy(owner_mapping);
 275         g_hash_table_destroy(counter_table);
 276
 277         g_hash_table_destroy(stats_table);
 278
 279         dbus_connection_unref(connection);
 280 }