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