*
* Connection Manager
*
- * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2013 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <glib.h>
#include <stdlib.h>
#include <gweb/gresolv.h>
+#include <netdb.h>
#include "connman.h"
-static char **system_timeservers = NULL;
-static char **timeservers = NULL;
+#define TS_RECHECK_INTERVAL 7200
+
+static struct connman_service *ts_service;
+static GSList *timeservers_list = NULL;
+static GSList *ts_list = NULL;
+static char *ts_current = NULL;
+static int ts_recheck_id = 0;
+static int ts_backoff_id = 0;
static GResolv *resolv = NULL;
static int resolv_id = 0;
-static volatile int count;
+
+static void sync_next(void);
static void resolv_debug(const char *str, void *data)
{
connman_info("%s: %s\n", (const char *) data, str);
}
+
+static void ntp_callback(bool success, void *user_data)
+{
+ DBG("success %d", success);
+
+ if (!success)
+ sync_next();
+}
+
static void save_timeservers(char **servers)
{
GKeyFile *keyfile;
int cnt;
keyfile = __connman_storage_load_global();
- if (keyfile == NULL)
+ if (!keyfile)
keyfile = g_key_file_new();
- for (cnt = 0; servers != NULL && servers[cnt] != NULL; cnt++);
+ for (cnt = 0; servers && servers[cnt]; cnt++);
g_key_file_set_string_list(keyfile, "global", "Timeservers",
(const gchar **)servers, cnt);
__connman_storage_save_global(keyfile);
g_key_file_free(keyfile);
-
- return;
}
-static char **load_timeservers()
+static char **load_timeservers(void)
{
GKeyFile *keyfile;
- GError *error = NULL;
char **servers = NULL;
keyfile = __connman_storage_load_global();
- if (keyfile == NULL)
+ if (!keyfile)
return NULL;
servers = g_key_file_get_string_list(keyfile, "global",
- "Timeservers", NULL, &error);
- if (error) {
- DBG("Error loading timeservers: %s", error->message);
- g_error_free(error);
- }
+ "Timeservers", NULL, NULL);
g_key_file_free(keyfile);
return servers;
}
-/* Restart NTP procedure */
-static void connman_timeserver_restart()
+static void resolv_result(GResolvResultStatus status, char **results,
+ gpointer user_data)
{
- /* If service timeservers are in use, dont restart ntp */
- if (timeservers != NULL)
- return;
+ int i;
- if (resolv == NULL) {
- DBG("No online service.");
- return;
- }
+#if defined TIZEN_EXT
+ gchar *server = NULL;
- /* Cancel current lookup */
- if(resolv_id > 0)
- g_resolv_cancel_lookup(resolv, resolv_id);
+ server = g_strdup((gchar *)user_data);
+ ts_list = g_slist_append(ts_list, server);
+
+ if (!simplified_log)
+ DBG("added server %s", server);
- /* Reload system timeserver list */
- if (system_timeservers != NULL) {
- g_strfreev(system_timeservers);
- system_timeservers = NULL;
+ if (!simplified_log)
+#endif
+ DBG("status %d", status);
+
+ if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
+ if (results) {
+ /* prepend the results in reverse order */
+
+ for (i = 0; results[i]; i++)
+ /* count */;
+ i--;
+
+ for (; i >= 0; i--) {
+ DBG("result[%d]: %s", i, results[i]);
+
+ ts_list = __connman_timeserver_add_list(
+ ts_list, results[i]);
+ }
+ }
}
- system_timeservers = load_timeservers();
+ sync_next();
+}
- if (system_timeservers == NULL)
- return;
+/*
+ * Once the timeserver list (timeserver_list) is created, we start
+ * querying the servers one by one. If resolving fails on one of them,
+ * we move to the next one. The user can enter either an IP address or
+ * a URL for the timeserver. We only resolve the URLs. Once we have an
+ * IP for the NTP server, we start querying it for time corrections.
+ */
+static void timeserver_sync_start(void)
+{
+ GSList *list;
- __connman_ntp_stop();
+ for (list = timeservers_list; list; list = list->next) {
+ char *timeserver = list->data;
- count = 0;
+ ts_list = g_slist_prepend(ts_list, g_strdup(timeserver));
+ }
+ ts_list = g_slist_reverse(ts_list);
- __connman_timeserver_sync_next();
+ sync_next();
}
-static void resolv_result(GResolvResultStatus status, char **results, gpointer user_data)
+static gboolean timeserver_sync_restart(gpointer user_data)
{
- int i;
+ timeserver_sync_start();
+ ts_backoff_id = 0;
- DBG("status %d", status);
+ return FALSE;
+}
- __sync_fetch_and_add(&count, 1);
+/*
+ * Select the next time server from the working list (ts_list) because
+ * for some reason the first time server in the list didn't work. If
+ * none of the server did work we start over with the first server
+ * with a backoff.
+ */
+static void sync_next(void)
+{
+ if (ts_current) {
+ g_free(ts_current);
+ ts_current = NULL;
+ }
- if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
- if (results != NULL) {
- for (i = 0; results[i]; i++)
- DBG("result: %s", results[i]);
+ __connman_ntp_stop();
- __connman_ntp_start(results[0]);
+ while (ts_list) {
+ ts_current = ts_list->data;
+ ts_list = g_slist_delete_link(ts_list, ts_list);
+ /* if it's an IP, directly query it. */
+ if (connman_inet_check_ipaddress(ts_current) > 0) {
+ DBG("Using timeserver %s", ts_current);
+ __connman_ntp_start(ts_current, ntp_callback, NULL);
return;
}
+#if defined TIZEN_EXT
+ if (!simplified_log)
+#endif
+ DBG("Resolving timeserver %s", ts_current);
+#if defined TIZEN_EXT
+ resolv_id = g_resolv_lookup_hostname(resolv, ts_current,
+ resolv_result, ts_current);
+#else
+ resolv_id = g_resolv_lookup_hostname(resolv, ts_current,
+ resolv_result, NULL);
+#endif
+ return;
+ }
+
+ DBG("No timeserver could be used, restart probing in 5 seconds");
+ ts_backoff_id = g_timeout_add_seconds(5, timeserver_sync_restart, NULL);
+}
+
+GSList *__connman_timeserver_add_list(GSList *server_list,
+ const char *timeserver)
+{
+ GSList *list = server_list;
+
+ if (!timeserver)
+ return server_list;
+
+ while (list) {
+ char *existing_server = list->data;
+ if (strcmp(timeserver, existing_server) == 0)
+ return server_list;
+ list = g_slist_next(list);
+ }
+ return g_slist_prepend(server_list, g_strdup(timeserver));
+}
+
+/*
+ * __connman_timeserver_get_all function creates the timeserver
+ * list which will be used to determine NTP server for time corrections.
+ * The service settings take priority over the global timeservers.
+ */
+GSList *__connman_timeserver_get_all(struct connman_service *service)
+{
+ GSList *list = NULL;
+ struct connman_network *network;
+ char **timeservers;
+ char **service_ts;
+ char **service_ts_config;
+ const char *service_gw;
+ char **fallback_ts;
+ int index, i;
+
+ if (__connman_clock_timeupdates() == TIME_UPDATES_MANUAL)
+ return NULL;
+
+ service_ts_config = connman_service_get_timeservers_config(service);
+
+ /* First add Service Timeservers.Configuration to the list */
+ for (i = 0; service_ts_config && service_ts_config[i];
+ i++)
+ list = __connman_timeserver_add_list(list,
+ service_ts_config[i]);
+
+ service_ts = connman_service_get_timeservers(service);
+
+ /* Then add Service Timeservers via DHCP to the list */
+ for (i = 0; service_ts && service_ts[i]; i++)
+ list = __connman_timeserver_add_list(list, service_ts[i]);
+
+ /*
+ * Then add Service Gateway to the list, if UseGatewaysAsTimeservers
+ * configuration option is set to true.
+ */
+ if (connman_setting_get_bool("UseGatewaysAsTimeservers")) {
+ network = __connman_service_get_network(service);
+ if (network) {
+ index = connman_network_get_index(network);
+ service_gw = __connman_ipconfig_get_gateway_from_index(index,
+ CONNMAN_IPCONFIG_TYPE_ALL);
+
+ if (service_gw)
+ list = __connman_timeserver_add_list(list, service_gw);
+ }
+ }
+
+ /* Then add Global Timeservers to the list */
+ timeservers = load_timeservers();
+
+ for (i = 0; timeservers && timeservers[i]; i++)
+ list = __connman_timeserver_add_list(list, timeservers[i]);
+
+ g_strfreev(timeservers);
+
+ fallback_ts = connman_setting_get_string_list("FallbackTimeservers");
+
+ /* Lastly add the fallback servers */
+ for (i = 0; fallback_ts && fallback_ts[i]; i++)
+ list = __connman_timeserver_add_list(list, fallback_ts[i]);
+
+ return g_slist_reverse(list);
+}
+
+static gboolean ts_recheck(gpointer user_data)
+{
+ GSList *ts;
+
+ ts = __connman_timeserver_get_all(connman_service_get_default());
+
+ if (!ts) {
+ DBG("timeservers disabled");
+
+ return TRUE;
}
- __connman_timeserver_sync_next();
+ if (g_strcmp0(ts_current, ts->data) != 0) {
+ DBG("current %s preferred %s", ts_current, (char *)ts->data);
+
+ g_slist_free_full(ts, g_free);
+
+ __connman_timeserver_sync(NULL);
+
+ return FALSE;
+ }
+
+ DBG("");
+
+ g_slist_free_full(ts, g_free);
+
+ return TRUE;
}
-void __connman_timeserver_sync_next()
+static void ts_recheck_disable(void)
{
- if (system_timeservers == NULL ||
- system_timeservers[count] == NULL)
+ if (ts_recheck_id == 0)
return;
- DBG("Trying timeserver %s", system_timeservers[count]);
+ g_source_remove(ts_recheck_id);
+ ts_recheck_id = 0;
+
+ if (ts_backoff_id) {
+ g_source_remove(ts_backoff_id);
+ ts_backoff_id = 0;
+ }
- if (resolv)
- resolv_id = g_resolv_lookup_hostname(resolv,
- system_timeservers[count], resolv_result,
- NULL);
+ if (ts_current) {
+ g_free(ts_current);
+ ts_current = NULL;
+ }
}
+static void ts_recheck_enable(void)
+{
+ if (ts_recheck_id > 0)
+ return;
+
+ ts_recheck_id = g_timeout_add_seconds(TS_RECHECK_INTERVAL, ts_recheck,
+ NULL);
+}
+
+/*
+ * This function must be called everytime the default service changes, the
+ * service timeserver(s) or gateway changes or the global timeserver(s) changes.
+ */
int __connman_timeserver_sync(struct connman_service *default_service)
{
struct connman_service *service;
char **nameservers;
int i;
- if (default_service != NULL)
+ if (default_service)
service = default_service;
else
- service = __connman_service_get_default();
+ service = connman_service_get_default();
- if (service == NULL)
+ if (!service)
return -EINVAL;
- DBG("service %p", service);
+#if !defined TIZEN_EXT
+ if (service == ts_service)
+ return -EALREADY;
+#endif
- i = __connman_service_get_index(service);
- if (i < 0)
- return -EINVAL;
+ if (!resolv)
+ return 0;
+ /*
+ * Before we start creating the new timeserver list we must stop
+ * any ongoing ntp query and server resolution.
+ */
- nameservers = connman_service_get_nameservers(service);
- if (nameservers == NULL)
- return -EINVAL;
+ __connman_ntp_stop();
- resolv = g_resolv_new(i);
- if (resolv == NULL)
- return -ENOMEM;
+ ts_recheck_disable();
- if (getenv("CONNMAN_RESOLV_DEBUG"))
- g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
+ if (resolv_id > 0)
+ g_resolv_cancel_lookup(resolv, resolv_id);
+
+ g_resolv_flush_nameservers(resolv);
- for (i = 0; nameservers[i] != NULL; i++)
+ nameservers = connman_service_get_nameservers(service);
+ if (!nameservers)
+ return -EINVAL;
+
+ for (i = 0; nameservers[i]; i++)
g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
- count = 0;
+ g_strfreev(nameservers);
- system_timeservers = load_timeservers();
+ g_slist_free_full(timeservers_list, g_free);
- timeservers = connman_service_get_timeservers(service);
+ timeservers_list = __connman_timeserver_get_all(service);
- if (timeservers != NULL && timeservers[0] != NULL) {
- DBG("Using service tiemservers");
- __connman_ntp_start(timeservers[0]);
- return 0;
- }
+ __connman_service_timeserver_changed(service, timeservers_list);
- if (system_timeservers == NULL || system_timeservers[count] == NULL) {
+ if (!timeservers_list) {
DBG("No timeservers set.");
return 0;
}
- DBG("Trying server %s", system_timeservers[count]);
+ ts_recheck_enable();
+
+ ts_service = service;
+ timeserver_sync_start();
- resolv_id = g_resolv_lookup_hostname(resolv, system_timeservers[count],
- resolv_result, NULL);
return 0;
}
-void __connman_timeserver_stop()
+static int timeserver_start(struct connman_service *service)
{
- DBG(" ");
+ char **nameservers;
+ int i;
+
+ DBG("service %p", service);
- if (resolv != NULL) {
+ i = __connman_service_get_index(service);
+ if (i < 0)
+ return -EINVAL;
+
+ nameservers = connman_service_get_nameservers(service);
+
+ /* Stop an already ongoing resolution, if there is one */
+ if (resolv && resolv_id > 0)
+ g_resolv_cancel_lookup(resolv, resolv_id);
+
+ /* get rid of the old resolver */
+ if (resolv) {
g_resolv_unref(resolv);
resolv = NULL;
}
- if (system_timeservers != NULL) {
- g_strfreev(system_timeservers);
- system_timeservers = NULL;
+ resolv = g_resolv_new(i);
+ if (!resolv) {
+ g_strfreev(nameservers);
+ return -ENOMEM;
}
- timeservers = NULL;
+ if (getenv("CONNMAN_RESOLV_DEBUG"))
+ g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
+
+ if (nameservers) {
+ for (i = 0; nameservers[i]; i++)
+ g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
+
+ g_strfreev(nameservers);
+ }
+
+ return __connman_timeserver_sync(service);
+}
+
+static void timeserver_stop(void)
+{
+ DBG(" ");
- count = 0;
+ ts_service = NULL;
+
+ if (resolv) {
+ g_resolv_unref(resolv);
+ resolv = NULL;
+ }
+
+ g_slist_free_full(timeservers_list, g_free);
+ timeservers_list = NULL;
+
+ g_slist_free_full(ts_list, g_free);
+ ts_list = NULL;
__connman_ntp_stop();
+
+ ts_recheck_disable();
}
int __connman_timeserver_system_set(char **servers)
{
save_timeservers(servers);
- connman_timeserver_restart();
+ __connman_timeserver_sync(NULL);
return 0;
}
static void default_changed(struct connman_service *default_service)
{
- DBG("");
-
- if (default_service != NULL)
- __connman_timeserver_sync(default_service);
+ if (default_service)
+ timeserver_start(default_service);
else
- __connman_timeserver_stop();
+ timeserver_stop();
}
-static struct connman_notifier timeserver_notifier = {
+static const struct connman_notifier timeserver_notifier = {
.name = "timeserver",
.default_changed = default_changed,
};
projects / platform / upstream / connman.git / blobdiff