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 *counter_table;
  33 static GHashTable *owner_mapping;
  34
  35 struct connman_counter {
  36         char *owner;
  37         char *path;
  38         unsigned int interval;
  39         guint watch;
  40 };
  41
  42 static void remove_counter(gpointer user_data)
  43 {
  44         struct connman_counter *counter = user_data;
  45
  46         DBG("owner %s path %s", counter->owner, counter->path);
  47
  48         __connman_rtnl_update_interval_remove(counter->interval);
  49
  50         __connman_service_counter_unregister(counter->path);
  51
  52         g_free(counter->owner);
  53         g_free(counter->path);
  54         g_free(counter);
  55 }
  56
  57 static void owner_disconnect(DBusConnection *connection, void *user_data)
  58 {
  59         struct connman_counter *counter = user_data;
  60
  61         DBG("owner %s path %s", counter->owner, counter->path);
  62
  63         g_hash_table_remove(owner_mapping, counter->owner);
  64         g_hash_table_remove(counter_table, counter->path);
  65 }
  66
  67 int __connman_counter_register(const char *owner, const char *path,
  68                                                 unsigned int interval)
  69 {
  70         struct connman_counter *counter;
  71         int err;
  72
  73         DBG("owner %s path %s interval %u", owner, path, interval);
  74
  75         counter = g_hash_table_lookup(counter_table, path);
  76         if (counter != NULL)
  77                 return -EEXIST;
  78
  79         counter = g_try_new0(struct connman_counter, 1);
  80         if (counter == NULL)
  81                 return -ENOMEM;
  82
  83         counter->owner = g_strdup(owner);
  84         counter->path = g_strdup(path);
  85
  86         err = __connman_service_counter_register(counter->path);
  87         if (err < 0) {
  88                 g_free(counter->owner);
  89                 g_free(counter->path);
  90                 g_free(counter);
  91                 return err;
  92         }
  93
  94         g_hash_table_replace(counter_table, counter->path, counter);
  95         g_hash_table_replace(owner_mapping, counter->owner, counter);
  96
  97         counter->interval = interval;
  98         __connman_rtnl_update_interval_add(counter->interval);
  99
 100         counter->watch = g_dbus_add_disconnect_watch(connection, owner,
 101                                         owner_disconnect, counter, NULL);
 102
 103         return 0;
 104 }
 105
 106 int __connman_counter_unregister(const char *owner, const char *path)
 107 {
 108         struct connman_counter *counter;
 109
 110         DBG("owner %s path %s", owner, path);
 111
 112         counter = g_hash_table_lookup(counter_table, path);
 113         if (counter == NULL)
 114                 return -ESRCH;
 115
 116         if (g_strcmp0(owner, counter->owner) != 0)
 117                 return -EACCES;
 118
 119         if (counter->watch > 0)
 120                 g_dbus_remove_watch(connection, counter->watch);
 121
 122         g_hash_table_remove(owner_mapping, counter->owner);
 123         g_hash_table_remove(counter_table, counter->path);
 124
 125         return 0;
 126 }
 127
 128 void __connman_counter_send_usage(const char *path,
 129                                         DBusMessage *message)
 130 {
 131         struct connman_counter *counter;
 132
 133         counter = g_hash_table_lookup(counter_table, path);
 134         if (counter == NULL)
 135                 return;
 136
 137         dbus_message_set_destination(message, counter->owner);
 138         dbus_message_set_path(message, counter->path);
 139         dbus_message_set_interface(message, CONNMAN_COUNTER_INTERFACE);
 140         dbus_message_set_member(message, "Usage");
 141         dbus_message_set_no_reply(message, TRUE);
 142
 143         g_dbus_send_message(connection, message);
 144 }
 145
 146 static void release_counter(gpointer key, gpointer value, gpointer user_data)
 147 {
 148         struct connman_counter *counter = value;
 149         DBusMessage *message;
 150
 151         DBG("owner %s path %s", counter->owner, counter->path);
 152
 153         if (counter->watch > 0)
 154                 g_dbus_remove_watch(connection, counter->watch);
 155
 156         message = dbus_message_new_method_call(counter->owner, counter->path,
 157                                         CONNMAN_COUNTER_INTERFACE, "Release");
 158         if (message == NULL)
 159                 return;
 160
 161         dbus_message_set_no_reply(message, TRUE);
 162
 163         g_dbus_send_message(connection, message);
 164 }
 165
 166 int __connman_counter_init(void)
 167 {
 168         DBG("");
 169
 170         connection = connman_dbus_get_connection();
 171         if (connection == NULL)
 172                 return -1;
 173
 174         counter_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 175                                                         NULL, remove_counter);
 176         owner_mapping = g_hash_table_new_full(g_str_hash, g_str_equal,
 177                                                                 NULL, NULL);
 178
 179         return 0;
 180 }
 181
 182 void __connman_counter_cleanup(void)
 183 {
 184         DBG("");
 185
 186         if (connection == NULL)
 187                 return;
 188
 189         g_hash_table_foreach(counter_table, release_counter, NULL);
 190
 191         g_hash_table_destroy(owner_mapping);
 192         g_hash_table_destroy(counter_table);
 193
 194         dbus_connection_unref(connection);
 195 }