src/timeserver.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 <errno.h>
  27
  28 #include <glib.h>
  29
  30 #include "connman.h"
  31
  32 static GSList *driver_list = NULL;
  33 static GHashTable *server_hash = NULL;
  34
  35 static gint compare_priority(gconstpointer a, gconstpointer b)
  36 {
  37         const struct connman_timeserver_driver *driver1 = a;
  38         const struct connman_timeserver_driver *driver2 = b;
  39
  40         return driver2->priority - driver1->priority;
  41 }
  42
  43 /**
  44  * connman_timeserver_driver_register:
  45  * @driver: timeserver driver definition
  46  *
  47  * Register a new timeserver driver
  48  *
  49  * Returns: %0 on success
  50  */
  51 int connman_timeserver_driver_register(struct connman_timeserver_driver *driver)
  52 {
  53         DBG("driver %p name %s", driver, driver->name);
  54
  55         driver_list = g_slist_insert_sorted(driver_list, driver,
  56                                                         compare_priority);
  57
  58         return 0;
  59 }
  60
  61 /**
  62  * connman_timeserver_driver_unregister:
  63  * @driver: timeserver driver definition
  64  *
  65  * Remove a previously registered timeserver driver
  66  */
  67 void connman_timeserver_driver_unregister(struct connman_timeserver_driver *driver)
  68 {
  69         DBG("driver %p name %s", driver, driver->name);
  70
  71         driver_list = g_slist_remove(driver_list, driver);
  72 }
  73
  74 /**
  75  * connman_timeserver_append:
  76  * @server: server address
  77  *
  78  * Append time server server address to current list
  79  */
  80 int connman_timeserver_append(const char *server)
  81 {
  82         GSList *list;
  83
  84         DBG("server %s", server);
  85
  86         if (server == NULL)
  87                 return -EINVAL;
  88
  89         /* This server is already handled by a driver */
  90         if (g_hash_table_lookup(server_hash, server))
  91                 return 0;
  92
  93         for (list = driver_list; list; list = list->next) {
  94                 struct connman_timeserver_driver *driver = list->data;
  95                 char *new_server;
  96
  97                 if (driver->append == NULL)
  98                         continue;
  99
 100                 new_server = g_strdup(server);
 101                 if (new_server == NULL)
 102                         return -ENOMEM;
 103
 104                 if (driver->append(server) == 0) {
 105                         g_hash_table_insert(server_hash, new_server, driver);
 106                         return 0;
 107                 } else {
 108                         g_free(new_server);
 109                 }
 110         }
 111
 112         return -ENOENT;
 113 }
 114
 115 /**
 116  * connman_timeserver_remove:
 117  * @server: server address
 118  *
 119  * Remover time server server address from current list
 120  */
 121 int connman_timeserver_remove(const char *server)
 122 {
 123         struct connman_timeserver_driver *driver;
 124
 125         DBG("server %s", server);
 126
 127         if (server == NULL)
 128                 return -EINVAL;
 129
 130         driver = g_hash_table_lookup(server_hash, server);
 131         if (driver == NULL)
 132                 return -EINVAL;
 133
 134         g_hash_table_remove(server_hash, server);
 135
 136         if (driver->remove == NULL)
 137                 return -ENOENT;
 138
 139         return driver->remove(server);
 140 }
 141
 142 void connman_timeserver_sync(void)
 143 {
 144         GSList *list;
 145
 146         DBG("");
 147
 148         for (list = driver_list; list; list = list->next) {
 149                 struct connman_timeserver_driver *driver = list->data;
 150
 151                 if (driver->sync == NULL)
 152                         continue;
 153
 154                 driver->sync();
 155         }
 156 }
 157
 158 int __connman_timeserver_init(void)
 159 {
 160         DBG("");
 161
 162         server_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
 163                                                 g_free, NULL);
 164
 165         return 0;
 166 }
 167
 168 void __connman_timeserver_cleanup(void)
 169 {
 170         DBG("");
 171
 172         g_hash_table_destroy(server_hash);
 173 }