X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Ftimeserver.c;h=ac99f76d2c605dc475d4e93ba6ac8e378da3ef59;hb=5bf80017321e03103f588306d2888d22f3f67ffa;hp=2af173d84c91cd8842ad7c64504e7dd1675af018;hpb=8f3c51386929c432af4d78c1e8ab1d82a1f6ac8b;p=platform%2Fupstream%2Fconnman.git

diff --git a/src/timeserver.c b/src/timeserver.c
old mode 100644
new mode 100755
index 2af173d..ac99f76
--- a/src/timeserver.c
+++ b/src/timeserver.c
@@ -2,7 +2,7 @@
  *
  *  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
@@ -28,32 +28,47 @@
 #include <glib.h>
 #include <stdlib.h>
 #include <gweb/gresolv.h>
+#include <netdb.h>
 
 #include "connman.h"
 
-static GSList *driver_list = NULL;
-static GHashTable *server_hash = NULL;
+#define TS_RECHECK_INTERVAL     7200
 
-static char **system_timeservers = NULL;
+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);
@@ -61,359 +76,411 @@ static void save_timeservers(char **servers)
 	__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;
 }
 
-static gint compare_priority(gconstpointer a, gconstpointer b)
+static void resolv_result(GResolvResultStatus status, char **results,
+				gpointer user_data)
 {
-	const struct connman_timeserver_driver *driver1 = a;
-	const struct connman_timeserver_driver *driver2 = b;
+	int i;
+
+#if defined TIZEN_EXT
+	gchar *server = NULL;
+
+	server = g_strdup((gchar *)user_data);
+	ts_list = g_slist_append(ts_list, server);
+
+	if (!simplified_log)
+		DBG("added server %s", server);
+
+	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]);
 
-	return driver2->priority - driver1->priority;
+				ts_list = __connman_timeserver_add_list(
+					ts_list, results[i]);
+			}
+		}
+	}
+
+	sync_next();
 }
 
-/**
- * connman_timeserver_driver_register:
- * @driver: timeserver driver definition
- *
- * Register a new timeserver driver
- *
- * Returns: %0 on success
+/*
+ * 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.
  */
-int connman_timeserver_driver_register(struct connman_timeserver_driver *driver)
+static void timeserver_sync_start(void)
 {
-	DBG("driver %p name %s", driver, driver->name);
+	GSList *list;
 
-	driver_list = g_slist_insert_sorted(driver_list, driver,
-							compare_priority);
+	for (list = timeservers_list; list; list = list->next) {
+		char *timeserver = list->data;
 
-	return 0;
+		ts_list = g_slist_prepend(ts_list, g_strdup(timeserver));
+	}
+	ts_list = g_slist_reverse(ts_list);
+
+	sync_next();
 }
 
-/**
- * connman_timeserver_driver_unregister:
- * @driver: timeserver driver definition
- *
- * Remove a previously registered timeserver driver
- */
-void connman_timeserver_driver_unregister(struct connman_timeserver_driver *driver)
+static gboolean timeserver_sync_restart(gpointer user_data)
 {
-	DBG("driver %p name %s", driver, driver->name);
+	timeserver_sync_start();
+	ts_backoff_id = 0;
 
-	driver_list = g_slist_remove(driver_list, driver);
+	return FALSE;
 }
 
-/**
- * connman_timeserver_append:
- * @server: server address
- *
- * Append time server server address to current list
+/*
+ * 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.
  */
-int connman_timeserver_append(const char *server)
+static void sync_next(void)
 {
-	GSList *list;
+	if (ts_current) {
+		g_free(ts_current);
+		ts_current = NULL;
+	}
 
-	DBG("server %s", server);
+	__connman_ntp_stop();
 
-	if (server == NULL)
-		return -EINVAL;
+	while (ts_list) {
+		ts_current = ts_list->data;
+		ts_list = g_slist_delete_link(ts_list, ts_list);
 
-	/* This server is already handled by a driver */
-	if (g_hash_table_lookup(server_hash, server))
-		return 0;
+		/* 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;
+	}
 
-	for (list = driver_list; list; list = list->next) {
-		struct connman_timeserver_driver *driver = list->data;
-		char *new_server;
+	DBG("No timeserver could be used, restart probing in 5 seconds");
+	ts_backoff_id = g_timeout_add_seconds(5, timeserver_sync_restart, NULL);
+}
 
-		if (driver->append == NULL)
-			continue;
+GSList *__connman_timeserver_add_list(GSList *server_list,
+		const char *timeserver)
+{
+	GSList *list = server_list;
 
-		new_server = g_strdup(server);
-		if (new_server == NULL)
-			return -ENOMEM;
+	if (!timeserver)
+		return server_list;
 
-		if (driver->append(server) == 0) {
-			g_hash_table_insert(server_hash, new_server, driver);
-			return 0;
-		} else {
-			g_free(new_server);
-		}
+	while (list) {
+		char *existing_server = list->data;
+		if (strcmp(timeserver, existing_server) == 0)
+			return server_list;
+		list = g_slist_next(list);
 	}
-
-	return -ENOENT;
+	return g_slist_prepend(server_list, g_strdup(timeserver));
 }
 
-/**
- * connman_timeserver_remove:
- * @server: server address
- *
- * Remover time server server address from current list
+/*
+ * __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.
  */
-int connman_timeserver_remove(const char *server)
+GSList *__connman_timeserver_get_all(struct connman_service *service)
 {
-	struct connman_timeserver_driver *driver;
+	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);
+		}
+	}
 
-	DBG("server %s", server);
+	/* Then add Global Timeservers to the list */
+	timeservers = load_timeservers();
 
-	if (server == NULL)
-		return -EINVAL;
+	for (i = 0; timeservers && timeservers[i]; i++)
+		list = __connman_timeserver_add_list(list, timeservers[i]);
 
-	driver = g_hash_table_lookup(server_hash, server);
-	if (driver == NULL)
-		return -EINVAL;
+	g_strfreev(timeservers);
 
-	g_hash_table_remove(server_hash, server);
+	fallback_ts = connman_setting_get_string_list("FallbackTimeservers");
 
-	if (driver->remove == NULL)
-		return -ENOENT;
+	/* Lastly add the fallback servers */
+	for (i = 0; fallback_ts && fallback_ts[i]; i++)
+		list = __connman_timeserver_add_list(list, fallback_ts[i]);
 
-	return driver->remove(server);
+	return g_slist_reverse(list);
 }
 
-/* Restart NTP procedure */
-static void connman_timeserver_restart()
+static gboolean ts_recheck(gpointer user_data)
 {
-	if (resolv == NULL) {
-		DBG("No online service.");
-		return;
-	}
+	GSList *ts;
 
-	/* Cancel current lookup */
-	if(resolv_id > 0)
-		g_resolv_cancel_lookup(resolv, resolv_id);
+	ts = __connman_timeserver_get_all(connman_service_get_default());
+
+	if (!ts) {
+		DBG("timeservers disabled");
 
-	/* Reload system timeserver list */
-	if (system_timeservers != NULL) {
-		g_strfreev(system_timeservers);
-		system_timeservers = NULL;
+		return TRUE;
 	}
 
-	system_timeservers = load_timeservers();
+	if (g_strcmp0(ts_current, ts->data) != 0) {
+		DBG("current %s preferred %s", ts_current, (char *)ts->data);
 
-	if (system_timeservers == NULL)
-		return;
+		g_slist_free_full(ts, g_free);
 
-	__connman_ntp_stop();
+		__connman_timeserver_sync(NULL);
 
-	count = 0;
+		return FALSE;
+	}
+
+	DBG("");
 
-	__connman_timeserver_sync_next();
+	g_slist_free_full(ts, g_free);
+
+	return TRUE;
 }
 
-static void resolv_result(GResolvResultStatus status, char **results, gpointer user_data)
+static void ts_recheck_disable(void)
 {
-	int i;
-
-	DBG("status %d", status);
+	if (ts_recheck_id == 0)
+		return;
 
-	if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
-		if (results != NULL) {
-			for (i = 0; results[i]; i++)
-				DBG("result: %s", results[i]);
+	g_source_remove(ts_recheck_id);
+	ts_recheck_id = 0;
 
-			__connman_ntp_start(results[0]);
+	if (ts_backoff_id) {
+		g_source_remove(ts_backoff_id);
+		ts_backoff_id = 0;
+	}
 
-			return;
-		}
+	if (ts_current) {
+		g_free(ts_current);
+		ts_current = NULL;
 	}
-	__sync_fetch_and_add(&count, 1);
-	__connman_timeserver_sync_next();
 }
 
-void __connman_timeserver_sync_next()
+static void ts_recheck_enable(void)
 {
-	if (system_timeservers == NULL ||
-	system_timeservers[count] == NULL)
+	if (ts_recheck_id > 0)
 		return;
 
-	DBG("Trying timeserver %s", system_timeservers[count]);
-
-	if (resolv)
-		resolv_id = g_resolv_lookup_hostname(resolv,
-			system_timeservers[count], resolv_result,
-						NULL);
+	ts_recheck_id = g_timeout_add_seconds(TS_RECHECK_INTERVAL, ts_recheck,
+			NULL);
 }
 
-int __connman_timeserver_sync(struct connman_service *service)
+/*
+ * 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)
 {
-	char **nameservers = NULL;
+	struct connman_service *service;
+	char **nameservers;
 	int i;
 
-	DBG("service %p", service);
+	if (default_service)
+		service = default_service;
+	else
+		service = connman_service_get_default();
 
-	i = __connman_service_get_index(service);
-	if (i < 0)
+	if (!service)
 		return -EINVAL;
 
-	nameservers = connman_service_get_nameservers(service);
-	if (nameservers == NULL)
-		return -EINVAL;
+#if !defined TIZEN_EXT
+	if (service == ts_service)
+		return -EALREADY;
+#endif
 
-	resolv = g_resolv_new(i);
-	if (resolv == NULL)
-		return -ENOMEM;
+	if (!resolv)
+		return 0;
+	/*
+	 * Before we start creating the new timeserver list we must stop
+	 * any ongoing ntp query and server resolution.
+	 */
 
-	if (getenv("CONNMAN_RESOLV_DEBUG"))
-		g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
+	__connman_ntp_stop();
 
-	for (i = 0; nameservers[i] != NULL; i++)
-		g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
+	ts_recheck_disable();
 
-	count = 0;
+	if (resolv_id > 0)
+		g_resolv_cancel_lookup(resolv, resolv_id);
 
-	system_timeservers = load_timeservers();
+	g_resolv_flush_nameservers(resolv);
 
-	if (system_timeservers == NULL || system_timeservers[count] == NULL) {
-		DBG("No timeservers set.");
-		return 0;
-	}
+	nameservers = connman_service_get_nameservers(service);
+	if (!nameservers)
+		return -EINVAL;
 
-	DBG("Trying server %s", system_timeservers[count]);
+	for (i = 0; nameservers[i]; i++)
+		g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
 
-	resolv_id = g_resolv_lookup_hostname(resolv, system_timeservers[count],
-						resolv_result, NULL);
-	return 0;
-}
+	g_strfreev(nameservers);
 
-void __connman_timeserver_stop()
-{
-	DBG(" ");
+	g_slist_free_full(timeservers_list, g_free);
 
-	if (resolv != NULL) {
-		g_resolv_unref(resolv);
-		resolv = NULL;
-	}
+	timeservers_list = __connman_timeserver_get_all(service);
+
+	__connman_service_timeserver_changed(service, timeservers_list);
 
-	if (system_timeservers != NULL) {
-		g_strfreev(system_timeservers);
-		system_timeservers = NULL;
+	if (!timeservers_list) {
+		DBG("No timeservers set.");
+		return 0;
 	}
 
-	count = 0;
+	ts_recheck_enable();
 
-	__connman_ntp_stop();
+	ts_service = service;
+	timeserver_sync_start();
+
+	return 0;
 }
 
-int __connman_timeserver_system_append(const char *server)
+static int timeserver_start(struct connman_service *service)
 {
-	int len;
-	char **servers = NULL;
-
-	if (server == NULL) {
-		save_timeservers(servers);
-		goto restart;
-	}
+	char **nameservers;
+	int i;
 
-	DBG("server %s", server);
+	DBG("service %p", service);
 
-	servers = load_timeservers();
+	i = __connman_service_get_index(service);
+	if (i < 0)
+		return -EINVAL;
 
-	if (servers != NULL) {
-		int i;
+	nameservers = connman_service_get_nameservers(service);
 
-		for (i = 0; servers[i] != NULL; i++)
-			if (g_strcmp0(servers[i], server) == 0) {
-				g_strfreev(servers);
-				return -EEXIST;
-			}
+	/* Stop an already ongoing resolution, if there is one */
+	if (resolv && resolv_id > 0)
+		g_resolv_cancel_lookup(resolv, resolv_id);
 
-		len = g_strv_length(servers);
-		servers = g_try_renew(char *, servers, len + 2);
-	} else {
-		len = 0;
-		servers = g_try_new0(char *, len + 2);
+	/* get rid of the old resolver */
+	if (resolv) {
+		g_resolv_unref(resolv);
+		resolv = NULL;
 	}
 
-	if (servers == NULL)
+	resolv = g_resolv_new(i);
+	if (!resolv) {
+		g_strfreev(nameservers);
 		return -ENOMEM;
+	}
 
-	servers[len] = g_strdup(server);
-	servers[len + 1] = NULL;
+	if (getenv("CONNMAN_RESOLV_DEBUG"))
+		g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
 
-	save_timeservers(servers);
+	if (nameservers) {
+		for (i = 0; nameservers[i]; i++)
+			g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
 
-	g_strfreev(servers);
-restart:
-	connman_timeserver_restart();
+		g_strfreev(nameservers);
+	}
 
-	return 0;
+	return __connman_timeserver_sync(service);
 }
 
-int __connman_timeserver_system_remove(const char *server)
+static void timeserver_stop(void)
 {
-	char **servers;
-	char **temp;
-	int len, i, j;
-
-	if (server == NULL)
-		return -EINVAL;
-
-	DBG("server %s", server);
-
-	servers = load_timeservers();
-
-	if (servers == NULL)
-		return 0;
+	DBG(" ");
 
-	len = g_strv_length(servers);
-	if (len == 1) {
-		if (g_strcmp0(servers[0], server) != 0) {
-			g_strfreev(servers);
-			return 0;
-		}
+	ts_service = NULL;
 
-		g_strfreev(servers);
-		servers = NULL;
-		save_timeservers(servers);
-		return 0;
+	if (resolv) {
+		g_resolv_unref(resolv);
+		resolv = NULL;
 	}
 
-	temp = g_try_new0(char *, len - 1);
-	if (temp == NULL) {
-			g_strfreev(servers);
-			return -ENOMEM;
-	}
+	g_slist_free_full(timeservers_list, g_free);
+	timeservers_list = NULL;
 
-	for (i = 0, j = 0; i < len; i++) {
-		if (g_strcmp0(servers[i], server) != 0) {
-			temp[j] = g_strdup(servers[i]);
-			j++;
-		}
-	}
-	temp[len - 1] = NULL;
+	g_slist_free_full(ts_list, g_free);
+	ts_list = NULL;
 
-	g_strfreev(servers);
-	servers = g_strdupv(temp);
-	g_strfreev(temp);
+	__connman_ntp_stop();
+
+	ts_recheck_disable();
+}
 
+int __connman_timeserver_system_set(char **servers)
+{
 	save_timeservers(servers);
-	g_strfreev(servers);
 
-	connman_timeserver_restart();
+	__connman_timeserver_sync(NULL);
 
 	return 0;
 }
@@ -426,12 +493,24 @@ char **__connman_timeserver_system_get()
 	return servers;
 }
 
+static void default_changed(struct connman_service *default_service)
+{
+	if (default_service)
+		timeserver_start(default_service);
+	else
+		timeserver_stop();
+}
+
+static const struct connman_notifier timeserver_notifier = {
+	.name			= "timeserver",
+	.default_changed	= default_changed,
+};
+
 int __connman_timeserver_init(void)
 {
 	DBG("");
 
-	server_hash = g_hash_table_new_full(g_str_hash, g_str_equal,
-						g_free, NULL);
+	connman_notifier_register(&timeserver_notifier);
 
 	return 0;
 }
@@ -440,5 +519,5 @@ void __connman_timeserver_cleanup(void)
 {
 	DBG("");
 
-	g_hash_table_destroy(server_hash);
+	connman_notifier_unregister(&timeserver_notifier);
 }