*
* Connection Manager
*
- * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2012 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;
+static GSList *ts_list = NULL;
static GResolv *resolv = NULL;
static int resolv_id = 0;
-static volatile int count;
static void resolv_debug(const char *str, void *data)
{
static char **load_timeservers()
{
GKeyFile *keyfile;
- GError *error = NULL;
char **servers = NULL;
keyfile = __connman_storage_load_global();
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()
-{
- /* If service timeservers are in use, dont restart ntp */
- if (timeservers != NULL)
- return;
-
- if (resolv == NULL) {
- DBG("No online service.");
- return;
- }
-
- /* Cancel current lookup */
- if(resolv_id > 0)
- g_resolv_cancel_lookup(resolv, resolv_id);
-
- /* Reload system timeserver list */
- if (system_timeservers != NULL) {
- g_strfreev(system_timeservers);
- system_timeservers = NULL;
- }
-
- system_timeservers = load_timeservers();
-
- if (system_timeservers == NULL)
- return;
-
- __connman_ntp_stop();
-
- count = 0;
-
- __connman_timeserver_sync_next();
-}
-
static void resolv_result(GResolvResultStatus status, char **results, gpointer user_data)
{
int i;
DBG("status %d", status);
- __sync_fetch_and_add(&count, 1);
-
if (status == G_RESOLV_RESULT_STATUS_SUCCESS) {
if (results != NULL) {
for (i = 0; results[i]; i++)
}
}
+ /* If resolving fails, move to the next server */
__connman_timeserver_sync_next();
}
+/*
+ * Once the timeserver list (ts_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 a IP for the NTP
+ * server, we start querying it for time corrections.
+ */
void __connman_timeserver_sync_next()
{
- if (system_timeservers == NULL ||
- system_timeservers[count] == NULL)
+ char *server;
+
+ __connman_ntp_stop();
+
+ /* Get the 1st server in the list */
+ if (ts_list == NULL)
return;
- DBG("Trying timeserver %s", system_timeservers[count]);
+ server = ts_list->data;
+
+ ts_list = g_slist_delete_link(ts_list, ts_list);
+
+ /* if its a IP , directly query it. */
+ if (connman_inet_check_ipaddress(server) > 0) {
+ DBG("Using timeservers %s", server);
+
+ __connman_ntp_start(server);
+
+ g_free(server);
+ return;
+ }
+
+ DBG("Resolving server %s", server);
+
+ resolv_id = g_resolv_lookup_hostname(resolv, server,
+ resolv_result, NULL);
+
+ g_free(server);
+
+ return;
+}
+
+GSList *__connman_timeserver_add_list(GSList *server_list,
+ const char *timeserver)
+{
+ GSList *list = server_list;
+
+ if (timeserver == NULL)
+ return server_list;
+
+ while (list != NULL) {
+ 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;
+
+ service_ts_config = connman_service_get_timeservers_config(service);
+
+ /* First add Service Timeservers.Configuration to the list */
+ for (i = 0; service_ts_config != NULL && service_ts_config[i] != NULL;
+ i++)
+ list = __connman_timeserver_add_list(list,
+ service_ts_config[i]);
+
+ service_ts = connman_service_get_timeservers(service);
+
+ /* First add Service Timeservers via DHCP to the list */
+ for (i = 0; service_ts != NULL && service_ts[i] != NULL; i++)
+ list = __connman_timeserver_add_list(list, service_ts[i]);
+
+ network = __connman_service_get_network(service);
+ if (network != NULL) {
+ index = connman_network_get_index(network);
+ service_gw = __connman_ipconfig_get_gateway_from_index(index,
+ CONNMAN_IPCONFIG_TYPE_ALL);
+
+ /* Then add Service Gateway to the list */
+ if (service_gw != NULL)
+ list = __connman_timeserver_add_list(list, service_gw);
+ }
+
+ /* Then add Global Timeservers to the list */
+ timeservers = load_timeservers();
+
+ for (i = 0; timeservers != NULL && timeservers[i] != NULL; i++)
+ list = __connman_timeserver_add_list(list, timeservers[i]);
+
+ g_strfreev(timeservers);
- if (resolv)
- resolv_id = g_resolv_lookup_hostname(resolv,
- system_timeservers[count], resolv_result,
- NULL);
+ fallback_ts = connman_setting_get_string_list("FallbackTimeservers");
+
+ /* Lastly add the fallback servers */
+ for (i = 0; fallback_ts != NULL && fallback_ts[i] != NULL; i++)
+ list = __connman_timeserver_add_list(list, fallback_ts[i]);
+
+ return g_slist_reverse(list);
}
+/*
+ * This function must be called everytime the default service changes, the
+ * service timeserver(s) or gatway 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)
service = default_service;
if (service == NULL)
return -EINVAL;
+ if (resolv == NULL)
+ return 0;
+ /*
+ * Before we start creating the new timeserver list we must stop
+ * any ongoing ntp query and server resolution.
+ */
+
+ __connman_ntp_stop();
+
+ if (resolv_id > 0)
+ g_resolv_cancel_lookup(resolv, resolv_id);
+
+ g_slist_free_full(ts_list, g_free);
+
+ ts_list = __connman_timeserver_get_all(service);
+
+ __connman_service_timeserver_changed(service, ts_list);
+
+ if (ts_list == NULL) {
+ DBG("No timeservers set.");
+ return 0;
+ }
+
+ __connman_timeserver_sync_next();
+
+ return 0;
+}
+
+static int timeserver_start(struct connman_service *service)
+{
+ char **nameservers;
+ int i;
+
DBG("service %p", service);
i = __connman_service_get_index(service);
if (nameservers == NULL)
return -EINVAL;
+ /* Stop an already ongoing resolution, if there is one */
+ if (resolv != NULL && resolv_id > 0)
+ g_resolv_cancel_lookup(resolv, resolv_id);
+
+ /* get rid of the old resolver */
+ if (resolv != NULL) {
+ g_resolv_unref(resolv);
+ resolv = NULL;
+ }
+
resolv = g_resolv_new(i);
- if (resolv == NULL)
+ if (resolv == NULL) {
+ g_strfreev(nameservers);
return -ENOMEM;
+ }
if (getenv("CONNMAN_RESOLV_DEBUG"))
g_resolv_set_debug(resolv, resolv_debug, "RESOLV");
for (i = 0; nameservers[i] != NULL; i++)
g_resolv_add_nameserver(resolv, nameservers[i], 53, 0);
- count = 0;
+ g_strfreev(nameservers);
- system_timeservers = load_timeservers();
-
- timeservers = connman_service_get_timeservers(service);
-
- if (timeservers != NULL && timeservers[0] != NULL) {
- DBG("Using service tiemservers");
- __connman_ntp_start(timeservers[0]);
- return 0;
- }
-
- if (system_timeservers == NULL || system_timeservers[count] == NULL) {
- DBG("No timeservers set.");
- return 0;
- }
-
- DBG("Trying server %s", system_timeservers[count]);
-
- resolv_id = g_resolv_lookup_hostname(resolv, system_timeservers[count],
- resolv_result, NULL);
- return 0;
+ return __connman_timeserver_sync(service);
}
-void __connman_timeserver_stop()
+static void timeserver_stop()
{
DBG(" ");
resolv = NULL;
}
- if (system_timeservers != NULL) {
- g_strfreev(system_timeservers);
- system_timeservers = NULL;
- }
-
- timeservers = NULL;
+ g_slist_free_full(ts_list, g_free);
- count = 0;
+ ts_list = NULL;
__connman_ntp_stop();
}
{
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);
+ timeserver_start(default_service);
else
- __connman_timeserver_stop();
+ timeserver_stop();
}
static struct connman_notifier timeserver_notifier = {
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