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