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         if (counter->watch > 0)
  49                 g_dbus_remove_watch(connection, counter->watch);
  50
  51         __connman_rtnl_update_interval_remove(counter->interval);
  52
  53         __connman_service_counter_unregister(counter->path);
  54
  55         g_free(counter->owner);
  56         g_free(counter->path);
  57         g_free(counter);
  58 }
  59
  60 static void owner_disconnect(DBusConnection *connection, void *user_data)
  61 {
  62         struct connman_counter *counter = user_data;
  63
  64         DBG("owner %s path %s", counter->owner, counter->path);
  65
  66         g_hash_table_remove(owner_mapping, counter->owner);
  67         g_hash_table_remove(counter_table, counter->path);
  68 }
  69
  70 int __connman_counter_register(const char *owner, const char *path,
  71                                                 unsigned int interval)
  72 {
  73         struct connman_counter *counter;
  74         int err;
  75
  76         DBG("owner %s path %s interval %u", owner, path, interval);
  77
  78         counter = g_hash_table_lookup(counter_table, path);
  79         if (counter != NULL)
  80                 return -EEXIST;
  81
  82         counter = g_try_new0(struct connman_counter, 1);
  83         if (counter == NULL)
  84                 return -ENOMEM;
  85
  86         counter->owner = g_strdup(owner);
  87         counter->path = g_strdup(path);
  88
  89         err = __connman_service_counter_register(counter->path);
  90         if (err < 0) {
  91                 g_free(counter->owner);
  92                 g_free(counter->path);
  93                 g_free(counter);
  94                 return err;
  95         }
  96
  97         g_hash_table_replace(counter_table, counter->path, counter);
  98         g_hash_table_replace(owner_mapping, counter->owner, counter);
  99
 100         counter->interval = interval;
 101         __connman_rtnl_update_interval_add(counter->interval);
 102
 103         counter->watch = g_dbus_add_disconnect_watch(connection, owner,
 104                                         owner_disconnect, counter, NULL);
 105
 106         return 0;
 107 }
 108
 109 int __connman_counter_unregister(const char *owner, const char *path)
 110 {
 111         struct connman_counter *counter;
 112
 113         DBG("owner %s path %s", owner, path);
 114
 115         counter = g_hash_table_lookup(counter_table, path);
 116         if (counter == NULL)
 117                 return -ESRCH;
 118
 119         if (g_strcmp0(owner, counter->owner) != 0)
 120                 return -EACCES;
 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         message = dbus_message_new_method_call(counter->owner, counter->path,
 154                                         CONNMAN_COUNTER_INTERFACE, "Release");
 155         if (message == NULL)
 156                 return;
 157
 158         dbus_message_set_no_reply(message, TRUE);
 159
 160         g_dbus_send_message(connection, message);
 161 }
 162
 163 int __connman_counter_init(void)
 164 {
 165         DBG("");
 166
 167         connection = connman_dbus_get_connection();
 168         if (connection == NULL)
 169                 return -1;
 170
 171         counter_table = g_hash_table_new_full(g_str_hash, g_str_equal,
 172                                                         NULL, remove_counter);
 173         owner_mapping = g_hash_table_new_full(g_str_hash, g_str_equal,
 174                                                                 NULL, NULL);
 175
 176         return 0;
 177 }
 178
 179 void __connman_counter_cleanup(void)
 180 {
 181         DBG("");
 182
 183         if (connection == NULL)
 184                 return;
 185
 186         g_hash_table_foreach(counter_table, release_counter, NULL);
 187
 188         g_hash_table_destroy(owner_mapping);
 189         g_hash_table_destroy(counter_table);
 190
 191         dbus_connection_unref(connection);
 192 }