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 #include <stdlib.h>
  30 #include <gweb/gresolv.h>
  31
  32 #include "connman.h"
  33
  34 static char **system_timeservers = NULL;
  35 static char **timeservers = NULL;
  36
  37 static GResolv *resolv = NULL;
  38 static int resolv_id = 0;
  39 static volatile int count;
  40
  41 static void resolv_debug(const char *str, void *data)
  42 {
  43         connman_info("%s: %s\n", (const char *) data, str);
  44 }
  45 static void save_timeservers(char **servers)
  46 {
  47         GKeyFile *keyfile;
  48         int cnt;
  49
  50         keyfile = __connman_storage_load_global();
  51         if (keyfile == NULL)
  52                 keyfile = g_key_file_new();
  53
  54         for (cnt = 0; servers != NULL && servers[cnt] != NULL; cnt++);
  55
  56         g_key_file_set_string_list(keyfile, "global", "Timeservers",
  57                            (const gchar **)servers, cnt);
  58
  59         __connman_storage_save_global(keyfile);
  60
  61         g_key_file_free(keyfile);
  62
  63         return;
  64 }
  65
  66 static char **load_timeservers()
  67 {
  68         GKeyFile *keyfile;
  69         GError *error = NULL;
  70         char **servers = NULL;
  71
  72         keyfile = __connman_storage_load_global();
  73         if (keyfile == NULL)
  74                 return NULL;
  75
  76         servers = g_key_file_get_string_list(keyfile, "global",
  77                                                 "Timeservers", NULL, &error);
  78         if (error) {
  79                 DBG("Error loading timeservers: %s", error->message);
  80                 g_error_free(error);
  81         }
  82
  83         g_key_file_free(keyfile);
  84
  85         return servers;
  86 }
  87
  88 /* Restart NTP procedure */
  89 static void connman_timeserver_restart()
  90 {
  91         /* If service timeservers are in use, dont restart ntp */
  92         if (timeservers != NULL)
  93                 return;
  94
  95         if (resolv == NULL) {
  96                 DBG("No online service.");
  97                 return;
  98         }
  99
 100         /* Cancel current lookup */
 101         if(resolv_id > 0)
 102                 g_resolv_cancel_lookup(resolv, resolv_id);
 103
 104         /* Reload system timeserver list */
 105         if (system_timeservers != NULL) {
 106                 g_strfreev(system_timeservers);
 107                 system_timeservers = NULL;
 108         }
 109
 110         system_timeservers = load_timeservers();
 111
 112         if (system_timeservers == NULL)
 113                 return;
 114
 115         __connman_ntp_stop();
 116
 117         count = 0;
 118
 119         __connman_timeserver_sync_next();
 120 }
 121
 122 static void resolv_result(GResolvResultStatus status, char **results, gpointer user_data)
 123 {
 124         int i;
 125
 126         DBG("status %d", status);
 127
 128         __sync_fetch_and_add(&count, 1);
 129
 130         if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
 131                 if (results != NULL) {
 132                         for (i = 0; results[i]; i++)
 133                                 DBG("result: %s", results[i]);
 134
 135                         __connman_ntp_start(results[0]);
 136
 137                         return;
 138                 }
 139         }
 140
 141         __connman_timeserver_sync_next();
 142 }
 143
 144 void __connman_timeserver_sync_next()
 145 {
 146         if (system_timeservers == NULL ||
 147         system_timeservers[count] == NULL)
 148                 return;
 149
 150         DBG("Trying timeserver %s", system_timeservers[count]);
 151
 152         if (resolv)
 153                 resolv_id = g_resolv_lookup_hostname(resolv,
 154                         system_timeservers[count], resolv_result,
 155                                                 NULL);
 156 }
 157
 158 int __connman_timeserver_sync(struct connman_service *service)
 159 {
 160         char **nameservers = NULL;
 161         int i;
 162
 163         DBG("service %p", service);
 164
 165         i = __connman_service_get_index(service);
 166         if (i < 0)
 167                 return -EINVAL;
 168
 169         nameservers = connman_service_get_nameservers(service);
 170         if (nameservers == NULL)
 171                 return -EINVAL;
 172
 173         resolv = g_resolv_new(i);
 174         if (resolv == NULL)
 175                 return -ENOMEM;
 176
 177         if (getenv("CONNMAN_RESOLV_DEBUG"))
 178                 g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
 179
 180         for (i = 0; nameservers[i] != NULL; i++)
 181                 g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
 182
 183         count = 0;
 184
 185         system_timeservers = load_timeservers();
 186
 187         timeservers = connman_service_get_timeservers(service);
 188
 189         if (timeservers != NULL && timeservers[0] != NULL) {
 190                 DBG("Using service tiemservers");
 191                 __connman_ntp_start(timeservers[0]);
 192                 return 0;
 193         }
 194
 195         if (system_timeservers == NULL || system_timeservers[count] == NULL) {
 196                 DBG("No timeservers set.");
 197                 return 0;
 198         }
 199
 200         DBG("Trying server %s", system_timeservers[count]);
 201
 202         resolv_id = g_resolv_lookup_hostname(resolv, system_timeservers[count],
 203                                                 resolv_result, NULL);
 204         return 0;
 205 }
 206
 207 void __connman_timeserver_stop()
 208 {
 209         DBG(" ");
 210
 211         if (resolv != NULL) {
 212                 g_resolv_unref(resolv);
 213                 resolv = NULL;
 214         }
 215
 216         if (system_timeservers != NULL) {
 217                 g_strfreev(system_timeservers);
 218                 system_timeservers = NULL;
 219         }
 220
 221         timeservers = NULL;
 222
 223         count = 0;
 224
 225         __connman_ntp_stop();
 226 }
 227
 228 int __connman_timeserver_system_append(const char *server)
 229 {
 230         int len;
 231         char **servers = NULL;
 232
 233         if (server == NULL) {
 234                 save_timeservers(servers);
 235                 goto restart;
 236         }
 237
 238         DBG("server %s", server);
 239
 240         servers = load_timeservers();
 241
 242         if (servers != NULL) {
 243                 int i;
 244
 245                 for (i = 0; servers[i] != NULL; i++)
 246                         if (g_strcmp0(servers[i], server) == 0) {
 247                                 g_strfreev(servers);
 248                                 return -EEXIST;
 249                         }
 250
 251                 len = g_strv_length(servers);
 252                 servers = g_try_renew(char *, servers, len + 2);
 253         } else {
 254                 len = 0;
 255                 servers = g_try_new0(char *, len + 2);
 256         }
 257
 258         if (servers == NULL)
 259                 return -ENOMEM;
 260
 261         servers[len] = g_strdup(server);
 262         servers[len + 1] = NULL;
 263
 264         save_timeservers(servers);
 265
 266         g_strfreev(servers);
 267 restart:
 268         connman_timeserver_restart();
 269
 270         return 0;
 271 }
 272
 273 int __connman_timeserver_system_remove(const char *server)
 274 {
 275         char **servers;
 276         char **temp;
 277         int len, i, j;
 278
 279         if (server == NULL)
 280                 return -EINVAL;
 281
 282         DBG("server %s", server);
 283
 284         servers = load_timeservers();
 285
 286         if (servers == NULL)
 287                 return 0;
 288
 289         len = g_strv_length(servers);
 290         if (len == 1) {
 291                 if (g_strcmp0(servers[0], server) != 0) {
 292                         g_strfreev(servers);
 293                         return 0;
 294                 }
 295
 296                 g_strfreev(servers);
 297                 servers = NULL;
 298                 save_timeservers(servers);
 299                 return 0;
 300         }
 301
 302         temp = g_try_new0(char *, len - 1);
 303         if (temp == NULL) {
 304                         g_strfreev(servers);
 305                         return -ENOMEM;
 306         }
 307
 308         for (i = 0, j = 0; i < len; i++) {
 309                 if (g_strcmp0(servers[i], server) != 0) {
 310                         temp[j] = g_strdup(servers[i]);
 311                         j++;
 312                 }
 313         }
 314         temp[len - 1] = NULL;
 315
 316         g_strfreev(servers);
 317         servers = g_strdupv(temp);
 318         g_strfreev(temp);
 319
 320         save_timeservers(servers);
 321         g_strfreev(servers);
 322
 323         connman_timeserver_restart();
 324
 325         return 0;
 326 }
 327
 328 char **__connman_timeserver_system_get()
 329 {
 330         char **servers;
 331
 332         servers = load_timeservers();
 333         return servers;
 334 }
 335
 336 int __connman_timeserver_init(void)
 337 {
 338         DBG("");
 339
 340         return 0;
 341 }
 342
 343 void __connman_timeserver_cleanup(void)
 344 {
 345         DBG("");
 346 }