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NetworkManager/src/devices/wifi/nm-device-wifi.c
Thomas Haller be813707f0 device: make the MTU globally configurable via connection-defaults 
This allows a user to restore the previous behavior where NetworkManager
would not reconfigure the MTU during device activation, if no MTU is
available (commit "22e8af6 device: set a per-device default MTU on
activation").

Well, not exactly. The previous behavior was to use per-connection
configuration, then DHCP provided value, or finally leave the MTU
unspecified.
Now, we prefer a per-connection configuration, followed by a global
connection default. If "ethernet.mtu=0", the MTU is left unspecified.
In absense of a global connection default, the value from DHCP is used
or finally a per-device-type default. That is effectively 1500 for most
types, except for infiniband where the MTU is still left unspecified.
2017-01-17 13:43:50 +01:00

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Copyright (C) 2005 - 2012 Red Hat, Inc.
* Copyright (C) 2006 - 2008 Novell, Inc.
*/
#include "nm-default.h"
#include "nm-device-wifi.h"
#include <netinet/in.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include "nm-common-macros.h"
#include "devices/nm-device.h"
#include "devices/nm-device-private.h"
#include "nm-utils.h"
#include "NetworkManagerUtils.h"
#include "nm-act-request.h"
#include "supplicant/nm-supplicant-manager.h"
#include "supplicant/nm-supplicant-interface.h"
#include "supplicant/nm-supplicant-config.h"
#include "nm-setting-connection.h"
#include "nm-setting-wireless.h"
#include "nm-setting-wireless-security.h"
#include "nm-setting-8021x.h"
#include "nm-setting-ip4-config.h"
#include "nm-ip4-config.h"
#include "nm-setting-ip6-config.h"
#include "platform/nm-platform.h"
#include "nm-auth-utils.h"
#include "settings/nm-settings-connection.h"
#include "settings/nm-settings.h"
#include "nm-core-internal.h"
#include "nm-config.h"
#include "introspection/org.freedesktop.NetworkManager.Device.Wireless.h"
#include "devices/nm-device-logging.h"
_LOG_DECLARE_SELF(NMDeviceWifi);
/* All of these are in seconds */
#define SCAN_INTERVAL_MIN 3
#define SCAN_INTERVAL_STEP 20
#define SCAN_INTERVAL_MAX 120
#define SCAN_RAND_MAC_ADDRESS_EXPIRE_MIN 5
#define WIRELESS_SECRETS_TRIES "wireless-secrets-tries"
/*****************************************************************************/
NM_GOBJECT_PROPERTIES_DEFINE (NMDeviceWifi,
PROP_MODE,
PROP_BITRATE,
PROP_ACCESS_POINTS,
PROP_ACTIVE_ACCESS_POINT,
PROP_CAPABILITIES,
PROP_SCANNING,
);
enum {
ACCESS_POINT_ADDED,
ACCESS_POINT_REMOVED,
SCANNING_ALLOWED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
typedef struct {
gint8 invalid_strength_counter;
GHashTable * aps;
NMWifiAP * current_ap;
guint32 rate;
bool enabled:1; /* rfkilled or not */
bool requested_scan:1;
bool ssid_found:1;
gint32 last_scan;
gint32 scheduled_scan_time;
guint8 scan_interval; /* seconds */
guint pending_scan_id;
guint ap_dump_id;
NMSupplicantManager *sup_mgr;
NMSupplicantInterface *sup_iface;
guint sup_timeout_id; /* supplicant association timeout */
NM80211Mode mode;
NMActRequestGetSecretsCallId wifi_secrets_id;
guint periodic_source_id;
guint link_timeout_id;
guint32 failed_iface_count;
guint reacquire_iface_id;
NMDeviceWifiCapabilities capabilities;
gint32 hw_addr_scan_expire;
char *hw_addr_scan;
} NMDeviceWifiPrivate;
struct _NMDeviceWifi
{
NMDevice parent;
NMDeviceWifiPrivate _priv;
};
struct _NMDeviceWifiClass
{
NMDeviceClass parent;
/* Signals */
gboolean (*scanning_allowed) (NMDeviceWifi *device);
};
/*****************************************************************************/
G_DEFINE_TYPE (NMDeviceWifi, nm_device_wifi, NM_TYPE_DEVICE)
#define NM_DEVICE_WIFI_GET_PRIVATE(self) _NM_GET_PRIVATE(self, NMDeviceWifi, NM_IS_DEVICE_WIFI)
/*****************************************************************************/
static gboolean check_scanning_allowed (NMDeviceWifi *self);
static void schedule_scan (NMDeviceWifi *self, gboolean backoff);
static void cleanup_association_attempt (NMDeviceWifi * self,
gboolean disconnect);
static void supplicant_iface_state_cb (NMSupplicantInterface *iface,
guint32 new_state,
guint32 old_state,
int disconnect_reason,
gpointer user_data);
static void supplicant_iface_new_bss_cb (NMSupplicantInterface * iface,
const char *object_path,
GVariant *properties,
NMDeviceWifi * self);
static void supplicant_iface_bss_updated_cb (NMSupplicantInterface *iface,
const char *object_path,
GVariant *properties,
NMDeviceWifi *self);
static void supplicant_iface_bss_removed_cb (NMSupplicantInterface *iface,
const char *object_path,
NMDeviceWifi *self);
static void supplicant_iface_scan_done_cb (NMSupplicantInterface * iface,
gboolean success,
NMDeviceWifi * self);
static void supplicant_iface_notify_scanning_cb (NMSupplicantInterface * iface,
GParamSpec * pspec,
NMDeviceWifi * self);
static void supplicant_iface_notify_current_bss (NMSupplicantInterface *iface,
GParamSpec *pspec,
NMDeviceWifi *self);
static void request_wireless_scan (NMDeviceWifi *self, GVariant *scan_options);
static void ap_add_remove (NMDeviceWifi *self,
guint signum,
NMWifiAP *ap,
gboolean recheck_available_connections);
static void remove_supplicant_interface_error_handler (NMDeviceWifi *self);
static void _hw_addr_set_scanning (NMDeviceWifi *self, gboolean do_reset);
/*****************************************************************************/
static void
constructed (GObject *object)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (object);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
G_OBJECT_CLASS (nm_device_wifi_parent_class)->constructed (object);
if (priv->capabilities & NM_WIFI_DEVICE_CAP_AP)
_LOGI (LOGD_PLATFORM | LOGD_WIFI, "driver supports Access Point (AP) mode");
/* Connect to the supplicant manager */
priv->sup_mgr = g_object_ref (nm_supplicant_manager_get ());
}
static gboolean
unmanaged_on_quit (NMDevice *self)
{
/* Wi-Fi devices cannot be assumed and are always taken down.
* However, also when being disconnected, we scan and thus
* set the MAC address to a random value.
*
* We must restore the original MAC address when quitting, thus
* signal to unmanage the device. */
return TRUE;
}
static gboolean
supplicant_interface_acquire (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
g_return_val_if_fail (self != NULL, FALSE);
g_return_val_if_fail (!priv->sup_iface, TRUE);
priv->sup_iface = nm_supplicant_manager_create_interface (priv->sup_mgr,
nm_device_get_iface (NM_DEVICE (self)),
NM_SUPPLICANT_DRIVER_WIRELESS);
if (!priv->sup_iface) {
_LOGE (LOGD_WIFI, "Couldn't initialize supplicant interface");
return FALSE;
}
if (nm_supplicant_interface_get_state (priv->sup_iface) < NM_SUPPLICANT_INTERFACE_STATE_READY)
nm_device_add_pending_action (NM_DEVICE (self), "waiting for supplicant", FALSE);
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_STATE,
G_CALLBACK (supplicant_iface_state_cb),
self);
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_NEW_BSS,
G_CALLBACK (supplicant_iface_new_bss_cb),
self);
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_BSS_UPDATED,
G_CALLBACK (supplicant_iface_bss_updated_cb),
self);
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_BSS_REMOVED,
G_CALLBACK (supplicant_iface_bss_removed_cb),
self);
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_SCAN_DONE,
G_CALLBACK (supplicant_iface_scan_done_cb),
self);
g_signal_connect (priv->sup_iface,
"notify::scanning",
G_CALLBACK (supplicant_iface_notify_scanning_cb),
self);
g_signal_connect (priv->sup_iface,
"notify::" NM_SUPPLICANT_INTERFACE_CURRENT_BSS,
G_CALLBACK (supplicant_iface_notify_current_bss),
self);
return TRUE;
}
static void
_requested_scan_set (NMDeviceWifi *self, gboolean value)
{
NMDeviceWifiPrivate *priv;
value = !!value;
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
if (priv->requested_scan == value)
return;
priv->requested_scan = value;
if (value)
nm_device_add_pending_action ((NMDevice *) self, "scan", TRUE);
else
nm_device_remove_pending_action ((NMDevice *) self, "scan", TRUE);
}
static void
supplicant_interface_release (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv;
g_return_if_fail (self != NULL);
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
_requested_scan_set (self, FALSE);
nm_clear_g_source (&priv->pending_scan_id);
/* Reset the scan interval to be pretty frequent when disconnected */
priv->scan_interval = SCAN_INTERVAL_MIN + SCAN_INTERVAL_STEP;
_LOGD (LOGD_WIFI_SCAN, "reset scanning interval to %d seconds",
priv->scan_interval);
nm_clear_g_source (&priv->ap_dump_id);
if (priv->sup_iface) {
/* Clear supplicant interface signal handlers */
g_signal_handlers_disconnect_by_data (priv->sup_iface, self);
/* Tell the supplicant to disconnect from the current AP */
nm_supplicant_interface_disconnect (priv->sup_iface);
g_clear_object (&priv->sup_iface);
}
}
static NMWifiAP *
get_ap_by_path (NMDeviceWifi *self, const char *path)
{
g_return_val_if_fail (path != NULL, NULL);
return g_hash_table_lookup (NM_DEVICE_WIFI_GET_PRIVATE (self)->aps, path);
}
static NMWifiAP *
get_ap_by_supplicant_path (NMDeviceWifi *self, const char *path)
{
GHashTableIter iter;
NMWifiAP *ap;
g_return_val_if_fail (path != NULL, NULL);
g_hash_table_iter_init (&iter, NM_DEVICE_WIFI_GET_PRIVATE (self)->aps);
while (g_hash_table_iter_next (&iter, NULL, (gpointer) &ap)) {
if (g_strcmp0 (path, nm_wifi_ap_get_supplicant_path (ap)) == 0)
return ap;
}
return NULL;
}
static void
update_seen_bssids_cache (NMDeviceWifi *self, NMWifiAP *ap)
{
g_return_if_fail (NM_IS_DEVICE_WIFI (self));
if (ap == NULL)
return;
/* Don't cache the BSSID for Ad-Hoc APs */
if (nm_wifi_ap_get_mode (ap) != NM_802_11_MODE_INFRA)
return;
if ( nm_device_get_state (NM_DEVICE (self)) == NM_DEVICE_STATE_ACTIVATED
&& nm_device_has_unmodified_applied_connection (NM_DEVICE (self), NM_SETTING_COMPARE_FLAG_NONE)) {
nm_settings_connection_add_seen_bssid (nm_device_get_settings_connection (NM_DEVICE (self)),
nm_wifi_ap_get_address (ap));
}
}
static void
set_current_ap (NMDeviceWifi *self, NMWifiAP *new_ap, gboolean recheck_available_connections)
{
NMDeviceWifiPrivate *priv;
NMWifiAP *old_ap;
g_return_if_fail (NM_IS_DEVICE_WIFI (self));
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
old_ap = priv->current_ap;
if (old_ap == new_ap)
return;
if (new_ap) {
priv->current_ap = g_object_ref (new_ap);
/* Update seen BSSIDs cache */
update_seen_bssids_cache (self, priv->current_ap);
} else
priv->current_ap = NULL;
if (old_ap) {
NM80211Mode mode = nm_wifi_ap_get_mode (old_ap);
/* Remove any AP from the internal list if it was created by NM or isn't known to the supplicant */
if (mode == NM_802_11_MODE_ADHOC || mode == NM_802_11_MODE_AP || nm_wifi_ap_get_fake (old_ap))
ap_add_remove (self, ACCESS_POINT_REMOVED, old_ap, recheck_available_connections);
g_object_unref (old_ap);
}
_notify (self, PROP_ACTIVE_ACCESS_POINT);
}
static void
periodic_update (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
int ifindex = nm_device_get_ifindex (NM_DEVICE (self));
guint32 new_rate;
int percent;
NMDeviceState state;
guint32 supplicant_state;
/* BSSID and signal strength have meaningful values only if the device
* is activated and not scanning.
*/
state = nm_device_get_state (NM_DEVICE (self));
if (state != NM_DEVICE_STATE_ACTIVATED)
return;
/* Only update current AP if we're actually talking to something, otherwise
* assume the old one (if any) is still valid until we're told otherwise or
* the connection fails.
*/
supplicant_state = nm_supplicant_interface_get_state (priv->sup_iface);
if ( supplicant_state < NM_SUPPLICANT_INTERFACE_STATE_AUTHENTICATING
|| supplicant_state > NM_SUPPLICANT_INTERFACE_STATE_COMPLETED
|| nm_supplicant_interface_get_scanning (priv->sup_iface))
return;
/* In AP mode we currently have nothing to do. */
if (priv->mode == NM_802_11_MODE_AP)
return;
if (priv->current_ap) {
/* Smooth out the strength to work around crappy drivers */
percent = nm_platform_wifi_get_quality (NM_PLATFORM_GET, ifindex);
if (percent >= 0 || ++priv->invalid_strength_counter > 3) {
nm_wifi_ap_set_strength (priv->current_ap, (gint8) percent);
priv->invalid_strength_counter = 0;
}
}
new_rate = nm_platform_wifi_get_rate (NM_PLATFORM_GET, ifindex);
if (new_rate != priv->rate) {
priv->rate = new_rate;
_notify (self, PROP_BITRATE);
}
}
static gboolean
periodic_update_cb (gpointer user_data)
{
periodic_update (NM_DEVICE_WIFI (user_data));
return TRUE;
}
static void
ap_add_remove (NMDeviceWifi *self,
guint signum,
NMWifiAP *ap,
gboolean recheck_available_connections)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
nm_assert (NM_IN_SET (signum, ACCESS_POINT_ADDED, ACCESS_POINT_REMOVED));
if (signum == ACCESS_POINT_ADDED) {
g_hash_table_insert (priv->aps,
(gpointer) nm_exported_object_export ((NMExportedObject *) ap),
g_object_ref (ap));
}
g_signal_emit (self, signals[signum], 0, ap);
if (signum == ACCESS_POINT_REMOVED) {
g_hash_table_remove (priv->aps, nm_exported_object_get_path ((NMExportedObject *) ap));
nm_exported_object_unexport ((NMExportedObject *) ap);
g_object_unref (ap);
}
_notify (self, PROP_ACCESS_POINTS);
nm_device_emit_recheck_auto_activate (NM_DEVICE (self));
if (recheck_available_connections)
nm_device_recheck_available_connections (NM_DEVICE (self));
}
static void
remove_all_aps (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
GHashTableIter iter;
NMWifiAP *ap;
if (!g_hash_table_size (priv->aps))
return;
set_current_ap (self, NULL, FALSE);
again:
g_hash_table_iter_init (&iter, priv->aps);
if (g_hash_table_iter_next (&iter, NULL, (gpointer) &ap)) {
ap_add_remove (self, ACCESS_POINT_REMOVED, ap, FALSE);
goto again;
}
nm_device_recheck_available_connections (NM_DEVICE (self));
}
static void
deactivate (NMDevice *device)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
int ifindex = nm_device_get_ifindex (device);
NM80211Mode old_mode = priv->mode;
nm_clear_g_source (&priv->periodic_source_id);
cleanup_association_attempt (self, TRUE);
priv->rate = 0;
set_current_ap (self, NULL, TRUE);
/* Clear any critical protocol notification in the Wi-Fi stack */
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, ifindex, FALSE);
/* Ensure we're in infrastructure mode after deactivation; some devices
* (usually older ones) don't scan well in adhoc mode.
*/
if (nm_platform_wifi_get_mode (NM_PLATFORM_GET, ifindex) != NM_802_11_MODE_INFRA) {
nm_device_take_down (NM_DEVICE (self), TRUE);
nm_platform_wifi_set_mode (NM_PLATFORM_GET, ifindex, NM_802_11_MODE_INFRA);
nm_device_bring_up (NM_DEVICE (self), TRUE, NULL);
}
if (priv->mode != NM_802_11_MODE_INFRA) {
priv->mode = NM_802_11_MODE_INFRA;
_notify (self, PROP_MODE);
}
/* Ensure we trigger a scan after deactivating a Hotspot */
if (old_mode == NM_802_11_MODE_AP)
request_wireless_scan (self, NULL);
}
static void
deactivate_reset_hw_addr (NMDevice *device)
{
_hw_addr_set_scanning ((NMDeviceWifi *) device, TRUE);
}
static gboolean
is_adhoc_wpa (NMConnection *connection)
{
NMSettingWireless *s_wifi;
NMSettingWirelessSecurity *s_wsec;
const char *mode, *key_mgmt;
/* The kernel doesn't support Ad-Hoc WPA connections well at this time,
* and turns them into open networks. It's been this way since at least
* 2.6.30 or so; until that's fixed, disable WPA-protected Ad-Hoc networks.
*/
s_wifi = nm_connection_get_setting_wireless (connection);
g_return_val_if_fail (s_wifi != NULL, FALSE);
mode = nm_setting_wireless_get_mode (s_wifi);
if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) != 0)
return FALSE;
s_wsec = nm_connection_get_setting_wireless_security (connection);
if (!s_wsec)
return FALSE;
key_mgmt = nm_setting_wireless_security_get_key_mgmt (s_wsec);
if (g_strcmp0 (key_mgmt, "wpa-none") != 0)
return FALSE;
return TRUE;
}
static gboolean
check_connection_compatible (NMDevice *device, NMConnection *connection)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMSettingConnection *s_con;
NMSettingWireless *s_wireless;
const char *mac;
const char * const *mac_blacklist;
int i;
const char *mode;
const char *perm_hw_addr;
if (!NM_DEVICE_CLASS (nm_device_wifi_parent_class)->check_connection_compatible (device, connection))
return FALSE;
s_con = nm_connection_get_setting_connection (connection);
g_assert (s_con);
if (strcmp (nm_setting_connection_get_connection_type (s_con), NM_SETTING_WIRELESS_SETTING_NAME))
return FALSE;
s_wireless = nm_connection_get_setting_wireless (connection);
if (!s_wireless)
return FALSE;
perm_hw_addr = nm_device_get_permanent_hw_address (device);
mac = nm_setting_wireless_get_mac_address (s_wireless);
if (perm_hw_addr) {
if (mac && !nm_utils_hwaddr_matches (mac, -1, perm_hw_addr, -1))
return FALSE;
/* Check for MAC address blacklist */
mac_blacklist = nm_setting_wireless_get_mac_address_blacklist (s_wireless);
for (i = 0; mac_blacklist[i]; i++) {
if (!nm_utils_hwaddr_valid (mac_blacklist[i], ETH_ALEN)) {
g_warn_if_reached ();
return FALSE;
}
if (nm_utils_hwaddr_matches (mac_blacklist[i], -1, perm_hw_addr, -1))
return FALSE;
}
} else if (mac)
return FALSE;
if (is_adhoc_wpa (connection))
return FALSE;
/* Early exit if supplicant or device doesn't support requested mode */
mode = nm_setting_wireless_get_mode (s_wireless);
if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) == 0) {
if (!(priv->capabilities & NM_WIFI_DEVICE_CAP_ADHOC))
return FALSE;
} else if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_AP) == 0) {
if (!(priv->capabilities & NM_WIFI_DEVICE_CAP_AP))
return FALSE;
if (priv->sup_iface) {
if (nm_supplicant_interface_get_ap_support (priv->sup_iface) == NM_SUPPLICANT_FEATURE_NO)
return FALSE;
}
}
// FIXME: check channel/freq/band against bands the hardware supports
// FIXME: check encryption against device capabilities
// FIXME: check bitrate against device capabilities
return TRUE;
}
static NMWifiAP *
find_first_compatible_ap (NMDeviceWifi *self,
NMConnection *connection,
gboolean allow_unstable_order)
{
GHashTableIter iter;
NMWifiAP *ap;
NMWifiAP *cand_ap = NULL;
g_return_val_if_fail (connection != NULL, NULL);
g_hash_table_iter_init (&iter, NM_DEVICE_WIFI_GET_PRIVATE (self)->aps);
while (g_hash_table_iter_next (&iter, NULL, (gpointer) &ap)) {
if (!nm_wifi_ap_check_compatible (ap, connection))
continue;
if (allow_unstable_order)
return ap;
if (!cand_ap || (nm_wifi_ap_get_id (cand_ap) < nm_wifi_ap_get_id (ap)))
cand_ap = ap;
}
return cand_ap;
}
static gboolean
check_connection_available (NMDevice *device,
NMConnection *connection,
NMDeviceCheckConAvailableFlags flags,
const char *specific_object)
{
NMSettingWireless *s_wifi;
const char *mode;
s_wifi = nm_connection_get_setting_wireless (connection);
g_return_val_if_fail (s_wifi, FALSE);
/* a connection that is available for a certain @specific_object, MUST
* also be available in general (without @specific_object). */
if (specific_object) {
NMWifiAP *ap;
ap = get_ap_by_path (NM_DEVICE_WIFI (device), specific_object);
return ap ? nm_wifi_ap_check_compatible (ap, connection) : FALSE;
}
/* Ad-Hoc and AP connections are always available because they may be
* started at any time.
*/
mode = nm_setting_wireless_get_mode (s_wifi);
if ( g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) == 0
|| g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_AP) == 0)
return TRUE;
/* Hidden SSIDs obviously don't always appear in the scan list either.
*
* For an explict user-activation-request, a connection is considered
* available because for hidden Wi-Fi, clients didn't consistently
* set the 'hidden' property to indicate hidden SSID networks. If
* activating but the network isn't available let the device recheck
* availability.
*/
if (nm_setting_wireless_get_hidden (s_wifi) || NM_FLAGS_HAS (flags, _NM_DEVICE_CHECK_CON_AVAILABLE_FOR_USER_REQUEST_IGNORE_AP))
return TRUE;
/* check at least one AP is compatible with this connection */
return !!find_first_compatible_ap (NM_DEVICE_WIFI (device), connection, TRUE);
}
static gboolean
is_manf_default_ssid (const GByteArray *ssid)
{
int i;
/*
* List of manufacturer default SSIDs that are often unchanged by users.
*
* NOTE: this list should *not* contain networks that you would like to
* automatically roam to like "Starbucks" or "AT&T" or "T-Mobile HotSpot".
*/
static const char *manf_defaults[] = {
"linksys",
"linksys-a",
"linksys-g",
"default",
"belkin54g",
"NETGEAR",
"o2DSL",
"WLAN",
"ALICE-WLAN",
"Speedport W 501V",
"TURBONETT",
};
for (i = 0; i < G_N_ELEMENTS (manf_defaults); i++) {
if (ssid->len == strlen (manf_defaults[i])) {
if (memcmp (manf_defaults[i], ssid->data, ssid->len) == 0)
return TRUE;
}
}
return FALSE;
}
static gboolean
complete_connection (NMDevice *device,
NMConnection *connection,
const char *specific_object,
const GSList *existing_connections,
GError **error)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMSettingWireless *s_wifi;
const char *setting_mac;
char *str_ssid = NULL;
NMWifiAP *ap = NULL;
const GByteArray *ssid = NULL;
GByteArray *tmp_ssid = NULL;
GBytes *setting_ssid = NULL;
gboolean hidden = FALSE;
const char *perm_hw_addr;
s_wifi = nm_connection_get_setting_wireless (connection);
if (!specific_object) {
/* If not given a specific object, we need at minimum an SSID */
if (!s_wifi) {
g_set_error_literal (error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_INVALID_CONNECTION,
"A 'wireless' setting is required if no AP path was given.");
return FALSE;
}
setting_ssid = nm_setting_wireless_get_ssid (s_wifi);
if (!setting_ssid || g_bytes_get_size (setting_ssid) == 0) {
g_set_error_literal (error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_INVALID_CONNECTION,
"A 'wireless' setting with a valid SSID is required if no AP path was given.");
return FALSE;
}
/* Find a compatible AP in the scan list */
ap = find_first_compatible_ap (self, connection, FALSE);
/* If we still don't have an AP, then the WiFI settings needs to be
* fully specified by the client. Might not be able to find an AP
* if the network isn't broadcasting the SSID for example.
*/
if (!ap) {
if (!nm_setting_verify (NM_SETTING (s_wifi), connection, error))
return FALSE;
hidden = TRUE;
}
} else {
ap = get_ap_by_path (self, specific_object);
if (!ap) {
g_set_error (error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_SPECIFIC_OBJECT_NOT_FOUND,
"The access point %s was not in the scan list.",
specific_object);
return FALSE;
}
}
/* Add a wifi setting if one doesn't exist yet */
if (!s_wifi) {
s_wifi = (NMSettingWireless *) nm_setting_wireless_new ();
nm_connection_add_setting (connection, NM_SETTING (s_wifi));
}
if (ap)
ssid = nm_wifi_ap_get_ssid (ap);
if (ssid == NULL) {
/* The AP must be hidden. Connecting to a WiFi AP requires the SSID
* as part of the initial handshake, so check the connection details
* for the SSID. The AP object will still be used for encryption
* settings and such.
*/
setting_ssid = nm_setting_wireless_get_ssid (s_wifi);
if (setting_ssid) {
ssid = tmp_ssid = g_byte_array_new ();
g_byte_array_append (tmp_ssid,
g_bytes_get_data (setting_ssid, NULL),
g_bytes_get_size (setting_ssid));
}
}
if (ssid == NULL) {
/* If there's no SSID on the AP itself, and no SSID in the
* connection data, then we cannot connect at all. Return an error.
*/
g_set_error_literal (error,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_INVALID_CONNECTION,
ap
? "A 'wireless' setting with a valid SSID is required for hidden access points."
: "Cannot create 'wireless' setting due to missing SSID.");
return FALSE;
}
if (ap) {
/* If the SSID is a well-known SSID, lock the connection to the AP's
* specific BSSID so NM doesn't autoconnect to some random wifi net.
*/
if (!nm_wifi_ap_complete_connection (ap,
connection,
is_manf_default_ssid (ssid),
error)) {
if (tmp_ssid)
g_byte_array_unref (tmp_ssid);
return FALSE;
}
}
/* The kernel doesn't support Ad-Hoc WPA connections well at this time,
* and turns them into open networks. It's been this way since at least
* 2.6.30 or so; until that's fixed, disable WPA-protected Ad-Hoc networks.
*/
if (is_adhoc_wpa (connection)) {
g_set_error_literal (error,
NM_CONNECTION_ERROR,
NM_CONNECTION_ERROR_INVALID_SETTING,
_("WPA Ad-Hoc disabled due to kernel bugs"));
g_prefix_error (error, "%s: ", NM_SETTING_WIRELESS_SECURITY_SETTING_NAME);
if (tmp_ssid)
g_byte_array_unref (tmp_ssid);
return FALSE;
}
str_ssid = nm_utils_ssid_to_utf8 (ssid->data, ssid->len);
nm_utils_complete_generic (NM_PLATFORM_GET,
connection,
NM_SETTING_WIRELESS_SETTING_NAME,
existing_connections,
str_ssid,
str_ssid,
NULL,
TRUE);
g_free (str_ssid);
if (tmp_ssid)
g_byte_array_unref (tmp_ssid);
if (hidden)
g_object_set (s_wifi, NM_SETTING_WIRELESS_HIDDEN, TRUE, NULL);
perm_hw_addr = nm_device_get_permanent_hw_address (device);
if (perm_hw_addr) {
setting_mac = nm_setting_wireless_get_mac_address (s_wifi);
if (setting_mac) {
/* Make sure the setting MAC (if any) matches the device's permanent MAC */
if (!nm_utils_hwaddr_matches (setting_mac, -1, perm_hw_addr, -1)) {
g_set_error_literal (error,
NM_CONNECTION_ERROR,
NM_CONNECTION_ERROR_INVALID_PROPERTY,
_("connection does not match device"));
g_prefix_error (error, "%s.%s: ", NM_SETTING_WIRELESS_SETTING_NAME, NM_SETTING_WIRELESS_MAC_ADDRESS);
return FALSE;
}
} else {
guint8 tmp[ETH_ALEN];
/* Lock the connection to this device by default if it uses a
* permanent MAC address (ie not a 'locally administered' one)
*/
nm_utils_hwaddr_aton (perm_hw_addr, tmp, ETH_ALEN);
if (!(tmp[0] & 0x02)) {
g_object_set (G_OBJECT (s_wifi),
NM_SETTING_WIRELESS_MAC_ADDRESS, perm_hw_addr,
NULL);
}
}
}
return TRUE;
}
static gboolean
is_available (NMDevice *device, NMDeviceCheckDevAvailableFlags flags)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
guint32 state;
if (!priv->enabled)
return FALSE;
if (!priv->sup_iface)
return FALSE;
state = nm_supplicant_interface_get_state (priv->sup_iface);
if ( state < NM_SUPPLICANT_INTERFACE_STATE_READY
|| state > NM_SUPPLICANT_INTERFACE_STATE_COMPLETED)
return FALSE;
return TRUE;
}
static gboolean
can_auto_connect (NMDevice *device,
NMConnection *connection,
char **specific_object)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMSettingWireless *s_wifi;
NMWifiAP *ap;
const char *method, *mode;
guint64 timestamp = 0;
nm_assert (!specific_object || !*specific_object);
if (!NM_DEVICE_CLASS (nm_device_wifi_parent_class)->can_auto_connect (device, connection, NULL))
return FALSE;
s_wifi = nm_connection_get_setting_wireless (connection);
g_return_val_if_fail (s_wifi, FALSE);
/* Always allow autoconnect for AP and non-autoconf Ad-Hoc */
method = nm_utils_get_ip_config_method (connection, NM_TYPE_SETTING_IP4_CONFIG);
mode = nm_setting_wireless_get_mode (s_wifi);
if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_AP) == 0)
return TRUE;
else if ( g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) == 0
&& g_strcmp0 (method, NM_SETTING_IP4_CONFIG_METHOD_AUTO) != 0)
return TRUE;
/* Don't autoconnect to networks that have been tried at least once
* but haven't been successful, since these are often accidental choices
* from the menu and the user may not know the password.
*/
if (nm_settings_connection_get_timestamp (NM_SETTINGS_CONNECTION (connection), &timestamp)) {
if (timestamp == 0)
return FALSE;
}
ap = find_first_compatible_ap (self, connection, FALSE);
if (ap) {
/* All good; connection is usable */
NM_SET_OUT (specific_object, g_strdup (nm_exported_object_get_path (NM_EXPORTED_OBJECT (ap))));
return TRUE;
}
return FALSE;
}
static int
ap_id_compare (gconstpointer p_a, gconstpointer p_b, gpointer user_data)
{
guint64 a_id = nm_wifi_ap_get_id (*((NMWifiAP **) p_a));
guint64 b_id = nm_wifi_ap_get_id (*((NMWifiAP **) p_b));
return a_id < b_id ? -1 : (a_id == b_id ? 0 : 1);
}
static NMWifiAP **
ap_list_get_sorted (NMDeviceWifi *self, gboolean include_without_ssid)
{
NMDeviceWifiPrivate *priv;
NMWifiAP **list;
GHashTableIter iter;
NMWifiAP *ap;
gsize i, n;
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
n = g_hash_table_size (priv->aps);
list = g_new (NMWifiAP *, n + 1);
i = 0;
if (n > 0) {
g_hash_table_iter_init (&iter, priv->aps);
while (g_hash_table_iter_next (&iter, NULL, (gpointer) &ap)) {
nm_assert (i < n);
if ( include_without_ssid
|| nm_wifi_ap_get_ssid (ap))
list[i++] = ap;
}
nm_assert (i <= n);
nm_assert (!include_without_ssid || i == n);
g_qsort_with_data (list,
i,
sizeof (gpointer),
ap_id_compare,
NULL);
}
list[i] = NULL;
return list;
}
static const char **
ap_list_get_sorted_paths (NMDeviceWifi *self, gboolean include_without_ssid)
{
gpointer *list;
gsize i, j;
list = (gpointer *) ap_list_get_sorted (self, include_without_ssid);
for (i = 0, j = 0; list[i]; i++) {
NMWifiAP *ap = list[i];
const char *path;
/* update @list inplace to hold instead the export-path. */
path = nm_exported_object_get_path (NM_EXPORTED_OBJECT (ap));
nm_assert (path);
list[j++] = (gpointer) path;
}
return (const char **) list;
}
static void
impl_device_wifi_get_access_points (NMDeviceWifi *self,
GDBusMethodInvocation *context)
{
gs_free const char **list = NULL;
GVariant *v;
list = ap_list_get_sorted_paths (self, FALSE);
v = g_variant_new_objv (list, -1);
g_dbus_method_invocation_return_value (context, g_variant_new_tuple (&v, 1));
}
static void
impl_device_wifi_get_all_access_points (NMDeviceWifi *self,
GDBusMethodInvocation *context)
{
gs_free const char **list = NULL;
GVariant *v;
list = ap_list_get_sorted_paths (self, TRUE);
v = g_variant_new_objv (list, -1);
g_dbus_method_invocation_return_value (context, g_variant_new_tuple (&v, 1));
}
static void
_hw_addr_set_scanning (NMDeviceWifi *self, gboolean do_reset)
{
NMDevice *device = (NMDevice *) self;
NMDeviceWifiPrivate *priv;
guint32 now;
gboolean randomize;
g_return_if_fail (NM_IS_DEVICE_WIFI (self));
if ( nm_device_is_activating (device)
|| nm_device_get_state (device) == NM_DEVICE_STATE_ACTIVATED)
return;
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
randomize = nm_config_data_get_device_config_boolean (NM_CONFIG_GET_DATA,
"wifi.scan-rand-mac-address",
device,
TRUE, TRUE);
if (!randomize) {
g_clear_pointer (&priv->hw_addr_scan, g_free);
if (do_reset)
nm_device_hw_addr_reset (device, "scanning");
return;
}
now = nm_utils_get_monotonic_timestamp_s ();
if ( !priv->hw_addr_scan
|| now >= priv->hw_addr_scan_expire) {
gs_free char *generate_mac_address_mask = NULL;
/* the random MAC address for scanning expires after a while.
*
* We don't bother with to update the MAC address exactly when
* it expires, instead on the next scan request, we will generate
* a new one.*/
priv->hw_addr_scan_expire = now + (SCAN_RAND_MAC_ADDRESS_EXPIRE_MIN * 60);
generate_mac_address_mask = nm_config_data_get_device_config (NM_CONFIG_GET_DATA,
"wifi.scan-generate-mac-address-mask",
device,
NULL);
g_free (priv->hw_addr_scan);
priv->hw_addr_scan = nm_utils_hw_addr_gen_random_eth (nm_device_get_initial_hw_address (device),
generate_mac_address_mask);
}
nm_device_hw_addr_set (device, priv->hw_addr_scan, "scanning", TRUE);
}
static void
request_scan_cb (NMDevice *device,
GDBusMethodInvocation *context,
NMAuthSubject *subject,
GError *error,
gpointer user_data)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv;
gs_unref_variant GVariant *new_scan_options = user_data;
if (error) {
g_dbus_method_invocation_return_gerror (context, error);
return;
}
if (!check_scanning_allowed (self)) {
g_dbus_method_invocation_return_error_literal (context,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_NOT_ALLOWED,
"Scanning not allowed at this time");
return;
}
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
request_wireless_scan (self, new_scan_options);
g_dbus_method_invocation_return_value (context, NULL);
}
static void
impl_device_wifi_request_scan (NMDeviceWifi *self,
GDBusMethodInvocation *context,
GVariant *options)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMDevice *device = NM_DEVICE (self);
gint32 last_scan;
if ( !priv->enabled
|| !priv->sup_iface
|| nm_device_get_state (device) < NM_DEVICE_STATE_DISCONNECTED
|| nm_device_is_activating (device)) {
g_dbus_method_invocation_return_error_literal (context,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_NOT_ALLOWED,
"Scanning not allowed while unavailable or activating");
return;
}
if (nm_supplicant_interface_get_scanning (priv->sup_iface)) {
g_dbus_method_invocation_return_error_literal (context,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_NOT_ALLOWED,
"Scanning not allowed while already scanning");
return;
}
last_scan = nm_supplicant_interface_get_last_scan_time (priv->sup_iface);
if (last_scan && (nm_utils_get_monotonic_timestamp_s () - last_scan) < 10) {
g_dbus_method_invocation_return_error_literal (context,
NM_DEVICE_ERROR,
NM_DEVICE_ERROR_NOT_ALLOWED,
"Scanning not allowed immediately following previous scan");
return;
}
/* Ask the manager to authenticate this request for us */
g_signal_emit_by_name (device,
NM_DEVICE_AUTH_REQUEST,
context,
NULL,
NM_AUTH_PERMISSION_NETWORK_CONTROL,
TRUE,
request_scan_cb,
options ? g_variant_ref (options) : NULL);
}
static gboolean
scanning_allowed (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
guint32 sup_state;
NMConnection *connection;
g_return_val_if_fail (priv->sup_iface != NULL, FALSE);
/* Scanning not done in AP mode */
if (priv->mode == NM_802_11_MODE_AP)
return FALSE;
switch (nm_device_get_state (NM_DEVICE (self))) {
case NM_DEVICE_STATE_UNKNOWN:
case NM_DEVICE_STATE_UNMANAGED:
case NM_DEVICE_STATE_UNAVAILABLE:
case NM_DEVICE_STATE_PREPARE:
case NM_DEVICE_STATE_CONFIG:
case NM_DEVICE_STATE_NEED_AUTH:
case NM_DEVICE_STATE_IP_CONFIG:
case NM_DEVICE_STATE_IP_CHECK:
case NM_DEVICE_STATE_SECONDARIES:
case NM_DEVICE_STATE_DEACTIVATING:
/* Don't scan when unusable or activating */
return FALSE;
case NM_DEVICE_STATE_DISCONNECTED:
case NM_DEVICE_STATE_FAILED:
/* Can always scan when disconnected */
return TRUE;
case NM_DEVICE_STATE_ACTIVATED:
/* Need to do further checks when activated */
break;
}
/* Don't scan if the supplicant is busy */
sup_state = nm_supplicant_interface_get_state (priv->sup_iface);
if ( sup_state == NM_SUPPLICANT_INTERFACE_STATE_ASSOCIATING
|| sup_state == NM_SUPPLICANT_INTERFACE_STATE_ASSOCIATED
|| sup_state == NM_SUPPLICANT_INTERFACE_STATE_4WAY_HANDSHAKE
|| sup_state == NM_SUPPLICANT_INTERFACE_STATE_GROUP_HANDSHAKE
|| nm_supplicant_interface_get_scanning (priv->sup_iface))
return FALSE;
connection = nm_device_get_applied_connection (NM_DEVICE (self));
if (connection) {
NMSettingWireless *s_wifi;
const char *ip4_method = NULL;
/* Don't scan when a shared connection is active; it makes drivers mad */
ip4_method = nm_utils_get_ip_config_method (connection, NM_TYPE_SETTING_IP4_CONFIG);
if (!strcmp (ip4_method, NM_SETTING_IP4_CONFIG_METHOD_SHARED))
return FALSE;
/* Don't scan when the connection is locked to a specifc AP, since
* intra-ESS roaming (which requires periodic scanning) isn't being
* used due to the specific AP lock. (bgo #513820)
*/
s_wifi = nm_connection_get_setting_wireless (connection);
g_assert (s_wifi);
if (nm_setting_wireless_get_bssid (s_wifi))
return FALSE;
}
return TRUE;
}
static gboolean
scanning_allowed_accumulator (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data)
{
if (!g_value_get_boolean (handler_return))
g_value_set_boolean (return_accu, FALSE);
return TRUE;
}
static gboolean
check_scanning_allowed (NMDeviceWifi *self)
{
GValue instance = G_VALUE_INIT;
GValue retval = G_VALUE_INIT;
g_value_init (&instance, G_TYPE_OBJECT);
g_value_take_object (&instance, self);
g_value_init (&retval, G_TYPE_BOOLEAN);
g_value_set_boolean (&retval, TRUE);
/* Use g_signal_emitv() rather than g_signal_emit() to avoid the return
* value being changed if no handlers are connected */
g_signal_emitv (&instance, signals[SCANNING_ALLOWED], 0, &retval);
return g_value_get_boolean (&retval);
}
static gboolean
hidden_filter_func (NMSettings *settings,
NMConnection *connection,
gpointer user_data)
{
NMSettingWireless *s_wifi;
s_wifi = (NMSettingWireless *) nm_connection_get_setting_wireless (connection);
return s_wifi ? nm_setting_wireless_get_hidden (s_wifi) : FALSE;
}
static GPtrArray *
build_hidden_probe_list (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
guint max_scan_ssids = nm_supplicant_interface_get_max_scan_ssids (priv->sup_iface);
GSList *connections, *iter;
GPtrArray *ssids = NULL;
static GByteArray *nullssid = NULL;
/* Need at least two: wildcard SSID and one or more hidden SSIDs */
if (max_scan_ssids < 2)
return NULL;
/* Static wildcard SSID used for every scan */
if (G_UNLIKELY (nullssid == NULL))
nullssid = g_byte_array_new ();
connections = nm_settings_get_best_connections (nm_device_get_settings ((NMDevice *) self),
max_scan_ssids - 1,
NM_SETTING_WIRELESS_SETTING_NAME,
NULL,
hidden_filter_func,
NULL);
if (connections && connections->data) {
ssids = g_ptr_array_new_full (max_scan_ssids - 1, (GDestroyNotify) g_byte_array_unref);
g_ptr_array_add (ssids, g_byte_array_ref (nullssid)); /* Add wildcard SSID */
}
for (iter = connections; iter; iter = g_slist_next (iter)) {
NMConnection *connection = iter->data;
NMSettingWireless *s_wifi;
GBytes *ssid;
GByteArray *ssid_array;
s_wifi = (NMSettingWireless *) nm_connection_get_setting_wireless (connection);
g_assert (s_wifi);
ssid = nm_setting_wireless_get_ssid (s_wifi);
g_assert (ssid);
ssid_array = g_byte_array_new ();
g_byte_array_append (ssid_array,
g_bytes_get_data (ssid, NULL),
g_bytes_get_size (ssid));
g_ptr_array_add (ssids, ssid_array);
}
g_slist_free (connections);
return ssids;
}
static GPtrArray *
ssids_options_to_ptrarray (GVariant *value)
{
GPtrArray *ssids = NULL;
GByteArray *ssid_array;
GVariant *v;
const guint8 *bytes;
gsize len;
int num_ssids, i;
num_ssids = g_variant_n_children (value);
if (num_ssids) {
ssids = g_ptr_array_new_full (num_ssids, (GDestroyNotify) g_byte_array_unref);
for (i = 0; i < num_ssids; i++) {
v = g_variant_get_child_value (value, i);
bytes = g_variant_get_fixed_array (v, &len, sizeof (guint8));
ssid_array = g_byte_array_new ();
g_byte_array_append (ssid_array, bytes, len);
g_ptr_array_add (ssids, ssid_array);
}
}
return ssids;
}
static void
request_wireless_scan (NMDeviceWifi *self, GVariant *scan_options)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
gboolean backoff = FALSE;
GPtrArray *ssids = NULL;
nm_clear_g_source (&priv->pending_scan_id);
if (priv->requested_scan) {
/* There's already a scan in progress */
return;
}
if (check_scanning_allowed (self)) {
_LOGD (LOGD_WIFI_SCAN, "scanning requested");
if (scan_options) {
GVariant *val = g_variant_lookup_value (scan_options, "ssids", NULL);
if (val) {
if (g_variant_is_of_type (val, G_VARIANT_TYPE ("aay")))
ssids = ssids_options_to_ptrarray (val);
else
_LOGD (LOGD_WIFI_SCAN, "ignoring invalid 'ssids' scan option");
g_variant_unref (val);
}
}
if (!ssids)
ssids = build_hidden_probe_list (self);
if (nm_logging_enabled (LOGL_DEBUG, LOGD_WIFI_SCAN)) {
if (ssids) {
const GByteArray *ssid;
guint i;
char *foo;
for (i = 0; i < ssids->len; i++) {
ssid = g_ptr_array_index (ssids, i);
foo = ssid->len > 0
? nm_utils_ssid_to_utf8 (ssid->data, ssid->len)
: NULL;
_LOGD (LOGD_WIFI_SCAN, "(%d) probe scanning SSID '%s'",
i, foo ? foo : "<hidden>");
g_free (foo);
}
} else
_LOGD (LOGD_WIFI_SCAN, "no SSIDs to probe scan");
}
_hw_addr_set_scanning (self, FALSE);
if (nm_supplicant_interface_request_scan (priv->sup_iface, ssids)) {
/* success */
backoff = TRUE;
_requested_scan_set (self, TRUE);
}
if (ssids)
g_ptr_array_unref (ssids);
} else
_LOGD (LOGD_WIFI_SCAN, "scan requested but not allowed at this time");
schedule_scan (self, backoff);
}
static gboolean
request_wireless_scan_periodic (gpointer user_data)
{
NMDeviceWifi *self = user_data;
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
priv->pending_scan_id = 0;
request_wireless_scan (self, NULL);
return G_SOURCE_REMOVE;
}
/*
* schedule_scan
*
* Schedule a wireless scan.
*
*/
static void
schedule_scan (NMDeviceWifi *self, gboolean backoff)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
gint32 now = nm_utils_get_monotonic_timestamp_s ();
/* Cancel the pending scan if it would happen later than (now + the scan_interval) */
if (priv->pending_scan_id) {
if (now + priv->scan_interval < priv->scheduled_scan_time)
nm_clear_g_source (&priv->pending_scan_id);
}
if (!priv->pending_scan_id) {
guint factor = 2, next_scan = priv->scan_interval;
if ( nm_device_is_activating (NM_DEVICE (self))
|| (nm_device_get_state (NM_DEVICE (self)) == NM_DEVICE_STATE_ACTIVATED))
factor = 1;
priv->pending_scan_id = g_timeout_add_seconds (next_scan,
request_wireless_scan_periodic,
self);
priv->scheduled_scan_time = now + priv->scan_interval;
if (backoff && (priv->scan_interval < (SCAN_INTERVAL_MAX / factor))) {
priv->scan_interval += (SCAN_INTERVAL_STEP / factor);
/* Ensure the scan interval will never be less than 20s... */
priv->scan_interval = MAX(priv->scan_interval, SCAN_INTERVAL_MIN + SCAN_INTERVAL_STEP);
/* ... or more than 120s */
priv->scan_interval = MIN(priv->scan_interval, SCAN_INTERVAL_MAX);
} else if (!backoff && (priv->scan_interval == 0)) {
/* Invalid combination; would cause continual rescheduling of
* the scan and hog CPU. Reset to something minimally sane.
*/
priv->scan_interval = 5;
}
_LOGD (LOGD_WIFI_SCAN, "scheduled scan in %d seconds (interval now %d seconds)",
next_scan, priv->scan_interval);
}
}
static void
supplicant_iface_scan_done_cb (NMSupplicantInterface *iface,
gboolean success,
NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
_LOGD (LOGD_WIFI_SCAN, "scan %s", success ? "successful" : "failed");
priv->last_scan = nm_utils_get_monotonic_timestamp_s ();
schedule_scan (self, success);
_requested_scan_set (self, FALSE);
}
/****************************************************************************
* WPA Supplicant control stuff
*
*/
static gboolean
ap_list_dump (gpointer user_data)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (user_data);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
gs_free NMWifiAP **list = NULL;
gsize i;
priv->ap_dump_id = 0;
_LOGD (LOGD_WIFI_SCAN, "APs: [now:%u last:%u next:%u]",
nm_utils_get_monotonic_timestamp_s (),
priv->last_scan,
priv->scheduled_scan_time);
list = ap_list_get_sorted (self, TRUE);
for (i = 0; list[i]; i++)
nm_wifi_ap_dump (list[i], "dump ", nm_device_get_iface (NM_DEVICE (self)));
return G_SOURCE_REMOVE;
}
static void
schedule_ap_list_dump (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
if (!nm_logging_enabled (LOGL_DEBUG, LOGD_WIFI_SCAN))
return;
nm_clear_g_source (&priv->ap_dump_id);
priv->ap_dump_id = g_timeout_add_seconds (1, ap_list_dump, self);
}
static void
try_fill_ssid_for_hidden_ap (NMDeviceWifi *self,
NMWifiAP *ap)
{
const char *bssid;
NMSettingsConnection *const*connections;
guint i;
g_return_if_fail (nm_wifi_ap_get_ssid (ap) == NULL);
bssid = nm_wifi_ap_get_address (ap);
g_return_if_fail (bssid);
/* Look for this AP's BSSID in the seen-bssids list of a connection,
* and if a match is found, copy over the SSID */
connections = nm_settings_get_connections (nm_device_get_settings ((NMDevice *) self), NULL);
for (i = 0; connections[i]; i++) {
NMConnection *connection = (NMConnection *) connections[i];
NMSettingWireless *s_wifi;
s_wifi = nm_connection_get_setting_wireless (connection);
if (s_wifi) {
if (nm_settings_connection_has_seen_bssid (NM_SETTINGS_CONNECTION (connection), bssid)) {
GBytes *ssid = nm_setting_wireless_get_ssid (s_wifi);
nm_wifi_ap_set_ssid (ap,
g_bytes_get_data (ssid, NULL),
g_bytes_get_size (ssid));
break;
}
}
}
}
static void
supplicant_iface_new_bss_cb (NMSupplicantInterface *iface,
const char *object_path,
GVariant *properties,
NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMDeviceState state;
NMWifiAP *ap;
NMWifiAP *found_ap = NULL;
const GByteArray *ssid;
g_return_if_fail (self != NULL);
g_return_if_fail (properties != NULL);
g_return_if_fail (iface != NULL);
/* Ignore new APs when unavailable, unmanaged, or in AP mode */
state = nm_device_get_state (NM_DEVICE (self));
if (state <= NM_DEVICE_STATE_UNAVAILABLE)
return;
if (NM_DEVICE_WIFI_GET_PRIVATE (self)->mode == NM_802_11_MODE_AP)
return;
ap = nm_wifi_ap_new_from_properties (object_path, properties);
if (!ap) {
_LOGD (LOGD_WIFI_SCAN, "invalid AP properties received for %s", object_path);
return;
}
/* Let the manager try to fill in the SSID from seen-bssids lists */
ssid = nm_wifi_ap_get_ssid (ap);
if (!ssid || nm_utils_is_empty_ssid (ssid->data, ssid->len)) {
/* Try to fill the SSID from the AP database */
try_fill_ssid_for_hidden_ap (self, ap);
ssid = nm_wifi_ap_get_ssid (ap);
if (ssid && (nm_utils_is_empty_ssid (ssid->data, ssid->len) == FALSE)) {
/* Yay, matched it, no longer treat as hidden */
_LOGD (LOGD_WIFI_SCAN, "matched hidden AP %s => '%s'",
nm_wifi_ap_get_address (ap), nm_utils_escape_ssid (ssid->data, ssid->len));
} else {
/* Didn't have an entry for this AP in the database */
_LOGD (LOGD_WIFI_SCAN, "failed to match hidden AP %s",
nm_wifi_ap_get_address (ap));
}
}
found_ap = get_ap_by_supplicant_path (self, object_path);
if (found_ap) {
nm_wifi_ap_dump (ap, "updated ", nm_device_get_iface (NM_DEVICE (self)));
nm_wifi_ap_update_from_properties (found_ap, object_path, properties);
} else {
nm_wifi_ap_dump (ap, "added ", nm_device_get_iface (NM_DEVICE (self)));
ap_add_remove (self, ACCESS_POINT_ADDED, ap, TRUE);
}
g_object_unref (ap);
/* Update the current AP if the supplicant notified a current BSS change
* before it sent the current BSS's scan result.
*/
if (g_strcmp0 (nm_supplicant_interface_get_current_bss (iface), object_path) == 0)
supplicant_iface_notify_current_bss (priv->sup_iface, NULL, self);
schedule_ap_list_dump (self);
}
static void
supplicant_iface_bss_updated_cb (NMSupplicantInterface *iface,
const char *object_path,
GVariant *properties,
NMDeviceWifi *self)
{
NMDeviceState state;
NMWifiAP *ap;
g_return_if_fail (self != NULL);
g_return_if_fail (object_path != NULL);
g_return_if_fail (properties != NULL);
/* Ignore new APs when unavailable or unmanaged */
state = nm_device_get_state (NM_DEVICE (self));
if (state <= NM_DEVICE_STATE_UNAVAILABLE)
return;
ap = get_ap_by_supplicant_path (self, object_path);
if (ap) {
nm_wifi_ap_dump (ap, "updated ", nm_device_get_iface (NM_DEVICE (self)));
nm_wifi_ap_update_from_properties (ap, object_path, properties);
schedule_ap_list_dump (self);
}
}
static void
supplicant_iface_bss_removed_cb (NMSupplicantInterface *iface,
const char *object_path,
NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv;
NMWifiAP *ap;
g_return_if_fail (self != NULL);
g_return_if_fail (object_path != NULL);
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
ap = get_ap_by_supplicant_path (self, object_path);
if (ap) {
if (ap == priv->current_ap) {
/* The current AP cannot be removed (to prevent NM indicating that
* it is connected, but to nothing), but it must be removed later
* when the current AP is changed or cleared. Set 'fake' to
* indicate that this AP is now unknown to the supplicant.
*/
nm_wifi_ap_set_fake (ap, TRUE);
} else {
nm_wifi_ap_dump (ap, "removed ", nm_device_get_iface (NM_DEVICE (self)));
ap_add_remove (self, ACCESS_POINT_REMOVED, ap, TRUE);
schedule_ap_list_dump (self);
}
}
}
static void
remove_supplicant_timeouts (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
nm_clear_g_source (&priv->sup_timeout_id);
nm_clear_g_source (&priv->link_timeout_id);
}
static void
cleanup_association_attempt (NMDeviceWifi *self, gboolean disconnect)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
remove_supplicant_interface_error_handler (self);
remove_supplicant_timeouts (self);
if (disconnect && priv->sup_iface)
nm_supplicant_interface_disconnect (priv->sup_iface);
}
static void
cleanup_supplicant_failures (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
nm_clear_g_source (&priv->reacquire_iface_id);
priv->failed_iface_count = 0;
}
static void
wifi_secrets_cb (NMActRequest *req,
NMActRequestGetSecretsCallId call_id,
NMSettingsConnection *connection,
GError *error,
gpointer user_data)
{
NMDevice *device = user_data;
NMDeviceWifi *self = user_data;
NMDeviceWifiPrivate *priv;
g_return_if_fail (NM_IS_DEVICE_WIFI (self));
g_return_if_fail (NM_IS_ACT_REQUEST (req));
priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
g_return_if_fail (priv->wifi_secrets_id == call_id);
priv->wifi_secrets_id = NULL;
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
return;
g_return_if_fail (req == nm_device_get_act_request (device));
g_return_if_fail (nm_device_get_state (device) == NM_DEVICE_STATE_NEED_AUTH);
g_return_if_fail (nm_act_request_get_settings_connection (req) == connection);
if (error) {
_LOGW (LOGD_WIFI, "%s", error->message);
nm_device_state_changed (device,
NM_DEVICE_STATE_FAILED,
NM_DEVICE_STATE_REASON_NO_SECRETS);
} else
nm_device_activate_schedule_stage1_device_prepare (device);
}
static void
wifi_secrets_cancel (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
if (priv->wifi_secrets_id)
nm_act_request_cancel_secrets (NULL, priv->wifi_secrets_id);
nm_assert (!priv->wifi_secrets_id);
}
static void
wifi_secrets_get_secrets (NMDeviceWifi *self,
const char *setting_name,
NMSecretAgentGetSecretsFlags flags)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMActRequest *req;
wifi_secrets_cancel (self);
req = nm_device_get_act_request (NM_DEVICE (self));
g_return_if_fail (NM_IS_ACT_REQUEST (req));
priv->wifi_secrets_id = nm_act_request_get_secrets (req,
TRUE,
setting_name,
flags,
NULL,
wifi_secrets_cb,
self);
g_return_if_fail (priv->wifi_secrets_id);
}
/*
* link_timeout_cb
*
* Called when the link to the access point has been down for a specified
* period of time.
*/
static gboolean
link_timeout_cb (gpointer user_data)
{
NMDevice *device = NM_DEVICE (user_data);
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
_LOGW (LOGD_WIFI, "link timed out.");
priv->link_timeout_id = 0;
/* Disconnect event while activated; the supplicant hasn't been able
* to reassociate within the timeout period, so the connection must
* fail.
*/
if (nm_device_get_state (device) != NM_DEVICE_STATE_ACTIVATED)
return FALSE;
set_current_ap (self, NULL, TRUE);
nm_device_state_changed (device,
NM_DEVICE_STATE_FAILED,
priv->ssid_found ? NM_DEVICE_STATE_REASON_SUPPLICANT_TIMEOUT :
NM_DEVICE_STATE_REASON_SSID_NOT_FOUND);
return FALSE;
}
static gboolean
need_new_8021x_secrets (NMDeviceWifi *self,
guint32 old_state,
const char **setting_name)
{
NMSetting8021x *s_8021x;
NMSettingWirelessSecurity *s_wsec;
NMSettingSecretFlags secret_flags = NM_SETTING_SECRET_FLAG_NONE;
NMConnection *connection;
g_assert (setting_name != NULL);
connection = nm_device_get_applied_connection (NM_DEVICE (self));
g_return_val_if_fail (connection != NULL, FALSE);
/* 802.1x stuff only happens in the supplicant's ASSOCIATED state when it's
* attempting to authenticate with the AP.
*/
if (old_state != NM_SUPPLICANT_INTERFACE_STATE_ASSOCIATED)
return FALSE;
/* If it's an 802.1x or LEAP connection with "always ask"/unsaved secrets
* then we need to ask again because it might be an OTP token and the PIN
* may have changed.
*/
s_8021x = nm_connection_get_setting_802_1x (connection);
if (s_8021x) {
if (!nm_setting_get_secret_flags (NM_SETTING (s_8021x),
NM_SETTING_802_1X_PASSWORD,
&secret_flags,
NULL))
g_assert_not_reached ();
if (secret_flags & NM_SETTING_SECRET_FLAG_NOT_SAVED)
*setting_name = NM_SETTING_802_1X_SETTING_NAME;
return *setting_name ? TRUE : FALSE;
}
s_wsec = nm_connection_get_setting_wireless_security (connection);
if (s_wsec) {
if (!nm_setting_get_secret_flags (NM_SETTING (s_wsec),
NM_SETTING_WIRELESS_SECURITY_LEAP_PASSWORD,
&secret_flags,
NULL))
g_assert_not_reached ();
if (secret_flags & NM_SETTING_SECRET_FLAG_NOT_SAVED)
*setting_name = NM_SETTING_WIRELESS_SECURITY_SETTING_NAME;
return *setting_name ? TRUE : FALSE;
}
/* Not a LEAP or 802.1x connection */
return FALSE;
}
static gboolean
need_new_wpa_psk (NMDeviceWifi *self,
guint32 old_state,
gint disconnect_reason,
const char **setting_name)
{
NMSettingWirelessSecurity *s_wsec;
NMConnection *connection;
const char *key_mgmt = NULL;
g_assert (setting_name != NULL);
connection = nm_device_get_applied_connection (NM_DEVICE (self));
g_return_val_if_fail (connection != NULL, FALSE);
/* A bad PSK will cause the supplicant to disconnect during the 4-way handshake */
if (old_state != NM_SUPPLICANT_INTERFACE_STATE_4WAY_HANDSHAKE)
return FALSE;
s_wsec = nm_connection_get_setting_wireless_security (connection);
if (s_wsec)
key_mgmt = nm_setting_wireless_security_get_key_mgmt (s_wsec);
if (g_strcmp0 (key_mgmt, "wpa-psk") == 0) {
/* -4 (locally-generated WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY) usually
* means the driver missed beacons from the AP. This usually happens
* due to driver bugs or faulty power-save management. It doesn't
* indicate that the PSK is wrong.
*/
#define LOCAL_WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY -4
if (disconnect_reason == LOCAL_WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY)
return FALSE;
*setting_name = NM_SETTING_WIRELESS_SECURITY_SETTING_NAME;
return TRUE;
}
/* Not a WPA-PSK connection */
return FALSE;
}
static gboolean
handle_8021x_or_psk_auth_fail (NMDeviceWifi *self,
guint32 new_state,
guint32 old_state,
int disconnect_reason)
{
NMDevice *device = NM_DEVICE (self);
NMActRequest *req;
const char *setting_name = NULL;
gboolean handled = FALSE;
g_return_val_if_fail (new_state == NM_SUPPLICANT_INTERFACE_STATE_DISCONNECTED, FALSE);
req = nm_device_get_act_request (NM_DEVICE (self));
g_return_val_if_fail (req != NULL, FALSE);
if ( need_new_8021x_secrets (self, old_state, &setting_name)
|| need_new_wpa_psk (self, old_state, disconnect_reason, &setting_name)) {
nm_act_request_clear_secrets (req);
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) disconnected during association, asking for new key");
cleanup_association_attempt (self, TRUE);
nm_device_state_changed (device, NM_DEVICE_STATE_NEED_AUTH, NM_DEVICE_STATE_REASON_SUPPLICANT_DISCONNECT);
wifi_secrets_get_secrets (self,
setting_name,
NM_SECRET_AGENT_GET_SECRETS_FLAG_ALLOW_INTERACTION
| NM_SECRET_AGENT_GET_SECRETS_FLAG_REQUEST_NEW);
handled = TRUE;
}
return handled;
}
static gboolean
reacquire_interface_cb (gpointer user_data)
{
NMDevice *device = NM_DEVICE (user_data);
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
priv->reacquire_iface_id = 0;
priv->failed_iface_count++;
_LOGW (LOGD_WIFI, "re-acquiring supplicant interface (#%d).", priv->failed_iface_count);
if (!priv->sup_iface)
supplicant_interface_acquire (self);
return G_SOURCE_REMOVE;
}
static void
supplicant_iface_state_cb (NMSupplicantInterface *iface,
guint32 new_state,
guint32 old_state,
int disconnect_reason,
gpointer user_data)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (user_data);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMDevice *device = NM_DEVICE (self);
NMDeviceState devstate;
gboolean scanning;
gboolean recheck_available = FALSE;
if (new_state == old_state)
return;
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"supplicant interface state: %s -> %s",
nm_supplicant_interface_state_to_string (old_state),
nm_supplicant_interface_state_to_string (new_state));
devstate = nm_device_get_state (device);
scanning = nm_supplicant_interface_get_scanning (iface);
/* In these states we know the supplicant is actually talking to something */
if ( new_state >= NM_SUPPLICANT_INTERFACE_STATE_ASSOCIATING
&& new_state <= NM_SUPPLICANT_INTERFACE_STATE_COMPLETED)
priv->ssid_found = TRUE;
switch (new_state) {
case NM_SUPPLICANT_INTERFACE_STATE_READY:
_LOGD (LOGD_WIFI_SCAN, "supplicant ready");
recheck_available = TRUE;
priv->scan_interval = SCAN_INTERVAL_MIN;
if (old_state < NM_SUPPLICANT_INTERFACE_STATE_READY)
nm_device_remove_pending_action (device, "waiting for supplicant", TRUE);
break;
case NM_SUPPLICANT_INTERFACE_STATE_COMPLETED:
remove_supplicant_interface_error_handler (self);
remove_supplicant_timeouts (self);
/* If this is the initial association during device activation,
* schedule the next activation stage.
*/
if (devstate == NM_DEVICE_STATE_CONFIG) {
NMConnection *connection;
NMSettingWireless *s_wifi;
GBytes *ssid;
connection = nm_device_get_applied_connection (NM_DEVICE (self));
g_return_if_fail (connection);
s_wifi = nm_connection_get_setting_wireless (connection);
g_return_if_fail (s_wifi);
ssid = nm_setting_wireless_get_ssid (s_wifi);
g_return_if_fail (ssid);
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) Stage 2 of 5 (Device Configure) successful. %s '%s'.",
priv->mode == NM_802_11_MODE_AP ? "Started Wi-Fi Hotspot" :
"Connected to wireless network",
ssid ? nm_utils_escape_ssid (g_bytes_get_data (ssid, NULL),
g_bytes_get_size (ssid)) : "(none)");
nm_device_activate_schedule_stage3_ip_config_start (device);
} else if (devstate == NM_DEVICE_STATE_ACTIVATED)
periodic_update (self);
break;
case NM_SUPPLICANT_INTERFACE_STATE_DISCONNECTED:
if ((devstate == NM_DEVICE_STATE_ACTIVATED) || nm_device_is_activating (device)) {
/* Disconnect of an 802.1x/LEAP connection during authentication,
* or disconnect of a WPA-PSK connection during the 4-way handshake,
* often means secrets are wrong. Not always the case, but until we
* have more information from wpa_supplicant about why the
* disconnect happened this is the best we can do.
*/
if (handle_8021x_or_psk_auth_fail (self, new_state, old_state, disconnect_reason))
break;
}
/* Otherwise it might be a stupid driver or some transient error, so
* let the supplicant try to reconnect a few more times. Give it more
* time if a scan is in progress since the link might be dropped during
* the scan but will be re-established when the scan is done.
*/
if (devstate == NM_DEVICE_STATE_ACTIVATED) {
if (priv->link_timeout_id == 0) {
priv->link_timeout_id = g_timeout_add_seconds (scanning ? 30 : 15, link_timeout_cb, self);
priv->ssid_found = FALSE;
}
}
break;
case NM_SUPPLICANT_INTERFACE_STATE_DOWN:
recheck_available = TRUE;
cleanup_association_attempt (self, FALSE);
if (old_state < NM_SUPPLICANT_INTERFACE_STATE_READY)
nm_device_remove_pending_action (device, "waiting for supplicant", TRUE);
/* If the device is already in UNAVAILABLE state then the state change
* is a NOP and the interface won't be re-acquired in the device state
* change handler. So ensure we have a new one here so that we're
* ready if the supplicant comes back.
*/
supplicant_interface_release (self);
if (priv->failed_iface_count < 5)
priv->reacquire_iface_id = g_timeout_add_seconds (10, reacquire_interface_cb, self);
else
_LOGI (LOGD_DEVICE | LOGD_WIFI, "supplicant interface keeps failing, giving up");
break;
case NM_SUPPLICANT_INTERFACE_STATE_INACTIVE:
_requested_scan_set (self, FALSE);
request_wireless_scan (self, NULL);
break;
default:
break;
}
if (recheck_available) {
nm_device_queue_recheck_available (NM_DEVICE (device),
NM_DEVICE_STATE_REASON_SUPPLICANT_AVAILABLE,
NM_DEVICE_STATE_REASON_SUPPLICANT_FAILED);
}
/* Signal scanning state changes */
if ( new_state == NM_SUPPLICANT_INTERFACE_STATE_SCANNING
|| old_state == NM_SUPPLICANT_INTERFACE_STATE_SCANNING)
_notify (self, PROP_SCANNING);
}
static void
supplicant_iface_connection_error_cb (NMSupplicantInterface *iface,
const char *name,
const char *message,
NMDeviceWifi *self)
{
NMDevice *device = NM_DEVICE (self);
if (nm_device_is_activating (device)) {
_LOGW (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) supplicant association failed: %s - %s",
name, message);
cleanup_association_attempt (self, TRUE);
nm_device_queue_state (device, NM_DEVICE_STATE_FAILED, NM_DEVICE_STATE_REASON_SUPPLICANT_FAILED);
}
}
static void
remove_supplicant_interface_error_handler (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
if (priv->sup_iface) {
g_signal_handlers_disconnect_by_func (priv->sup_iface,
supplicant_iface_connection_error_cb,
self);
}
}
static void
supplicant_iface_notify_scanning_cb (NMSupplicantInterface *iface,
GParamSpec *pspec,
NMDeviceWifi *self)
{
NMDeviceState state;
gboolean scanning;
scanning = nm_supplicant_interface_get_scanning (iface);
_LOGD (LOGD_WIFI_SCAN, "now %s", scanning ? "scanning" : "idle");
_notify (self, PROP_SCANNING);
/* Run a quick update of current AP when coming out of a scan */
state = nm_device_get_state (NM_DEVICE (self));
if (!scanning && state == NM_DEVICE_STATE_ACTIVATED)
periodic_update (self);
}
static void
supplicant_iface_notify_current_bss (NMSupplicantInterface *iface,
GParamSpec *pspec,
NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
const char *current_bss;
NMWifiAP *new_ap = NULL;
current_bss = nm_supplicant_interface_get_current_bss (iface);
if (current_bss)
new_ap = get_ap_by_supplicant_path (self, current_bss);
if (new_ap != priv->current_ap) {
const char *new_bssid = NULL;
const GByteArray *new_ssid = NULL;
const char *old_bssid = NULL;
const GByteArray *old_ssid = NULL;
/* Don't ever replace a "fake" current AP if we don't know about the
* supplicant's current BSS yet. It'll get replaced when we receive
* the current BSS's scan result.
*/
if (new_ap == NULL && nm_wifi_ap_get_fake (priv->current_ap))
return;
if (new_ap) {
new_bssid = nm_wifi_ap_get_address (new_ap);
new_ssid = nm_wifi_ap_get_ssid (new_ap);
}
if (priv->current_ap) {
old_bssid = nm_wifi_ap_get_address (priv->current_ap);
old_ssid = nm_wifi_ap_get_ssid (priv->current_ap);
}
_LOGD (LOGD_WIFI, "roamed from BSSID %s (%s) to %s (%s)",
old_bssid ? old_bssid : "(none)",
old_ssid ? nm_utils_escape_ssid (old_ssid->data, old_ssid->len) : "(none)",
new_bssid ? new_bssid : "(none)",
new_ssid ? nm_utils_escape_ssid (new_ssid->data, new_ssid->len) : "(none)");
set_current_ap (self, new_ap, TRUE);
}
}
static NMActStageReturn
handle_auth_or_fail (NMDeviceWifi *self,
NMActRequest *req,
gboolean new_secrets)
{
const char *setting_name;
guint32 tries;
NMConnection *applied_connection;
NMActStageReturn ret = NM_ACT_STAGE_RETURN_FAILURE;
g_return_val_if_fail (NM_IS_DEVICE_WIFI (self), NM_ACT_STAGE_RETURN_FAILURE);
if (!req) {
req = nm_device_get_act_request (NM_DEVICE (self));
g_return_val_if_fail (req, NM_ACT_STAGE_RETURN_FAILURE);
}
applied_connection = nm_act_request_get_applied_connection (req);
tries = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (applied_connection), WIRELESS_SECRETS_TRIES));
if (tries > 3)
return NM_ACT_STAGE_RETURN_FAILURE;
nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_NEED_AUTH, NM_DEVICE_STATE_REASON_NONE);
nm_act_request_clear_secrets (req);
setting_name = nm_connection_need_secrets (applied_connection, NULL);
if (setting_name) {
wifi_secrets_get_secrets (self, setting_name,
NM_SECRET_AGENT_GET_SECRETS_FLAG_ALLOW_INTERACTION
| (new_secrets ? NM_SECRET_AGENT_GET_SECRETS_FLAG_REQUEST_NEW : 0));
g_object_set_data (G_OBJECT (applied_connection), WIRELESS_SECRETS_TRIES, GUINT_TO_POINTER (++tries));
ret = NM_ACT_STAGE_RETURN_POSTPONE;
} else
_LOGW (LOGD_DEVICE, "Cleared secrets, but setting didn't need any secrets.");
return ret;
}
/*
* supplicant_connection_timeout_cb
*
* Called when the supplicant has been unable to connect to an access point
* within a specified period of time.
*/
static gboolean
supplicant_connection_timeout_cb (gpointer user_data)
{
NMDevice *device = NM_DEVICE (user_data);
NMDeviceWifi *self = NM_DEVICE_WIFI (user_data);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMActRequest *req;
NMConnection *connection;
cleanup_association_attempt (self, TRUE);
if (!nm_device_is_activating (device))
return FALSE;
/* Timed out waiting for a successful connection to the AP; if the AP's
* security requires network-side authentication (like WPA or 802.1x)
* and the connection attempt timed out then it's likely the authentication
* information (passwords, pin codes, etc) are wrong.
*/
req = nm_device_get_act_request (device);
g_assert (req);
connection = nm_act_request_get_applied_connection (req);
g_assert (connection);
if ( priv->mode == NM_802_11_MODE_ADHOC
|| priv->mode == NM_802_11_MODE_AP) {
/* In Ad-Hoc and AP modes there's nothing to check the encryption key
* (if any), so supplicant timeouts here are almost certainly the wifi
* driver being really stupid.
*/
_LOGW (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) %s network creation took too long, failing activation",
priv->mode == NM_802_11_MODE_ADHOC ? "Ad-Hoc" : "Hotspot");
nm_device_state_changed (device, NM_DEVICE_STATE_FAILED,
NM_DEVICE_STATE_REASON_SUPPLICANT_TIMEOUT);
return FALSE;
}
g_assert (priv->mode == NM_802_11_MODE_INFRA);
if (priv->ssid_found && nm_connection_get_setting_wireless_security (connection)) {
guint64 timestamp = 0;
gboolean new_secrets = TRUE;
/* Connection failed; either driver problems, the encryption key is
* wrong, or the passwords or certificates were wrong.
*/
_LOGW (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) association took too long");
/* Ask for new secrets only if we've never activated this connection
* before. If we've connected before, don't bother the user with
* dialogs, just retry or fail, and if we never connect the user can
* fix the password somewhere else.
*/
if (nm_settings_connection_get_timestamp (nm_act_request_get_settings_connection (req), &timestamp))
new_secrets = !timestamp;
if (handle_auth_or_fail (self, req, new_secrets) == NM_ACT_STAGE_RETURN_POSTPONE)
_LOGW (LOGD_DEVICE | LOGD_WIFI, "Activation: (wifi) asking for new secrets");
else {
nm_device_state_changed (device, NM_DEVICE_STATE_FAILED,
NM_DEVICE_STATE_REASON_NO_SECRETS);
}
} else {
_LOGW (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) association took too long, failing activation");
nm_device_state_changed (device, NM_DEVICE_STATE_FAILED,
priv->ssid_found ? NM_DEVICE_STATE_REASON_SUPPLICANT_TIMEOUT :
NM_DEVICE_STATE_REASON_SSID_NOT_FOUND);
}
return FALSE;
}
static NMSupplicantConfig *
build_supplicant_config (NMDeviceWifi *self,
NMConnection *connection,
guint32 fixed_freq,
GError **error)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMSupplicantConfig *config = NULL;
NMSettingWireless *s_wireless;
NMSettingWirelessSecurity *s_wireless_sec;
g_return_val_if_fail (priv->sup_iface, NULL);
s_wireless = nm_connection_get_setting_wireless (connection);
g_return_val_if_fail (s_wireless != NULL, NULL);
config = nm_supplicant_config_new ();
/* Warn if AP mode may not be supported */
if ( g_strcmp0 (nm_setting_wireless_get_mode (s_wireless), NM_SETTING_WIRELESS_MODE_AP) == 0
&& nm_supplicant_interface_get_ap_support (priv->sup_iface) == NM_SUPPLICANT_FEATURE_UNKNOWN) {
_LOGW (LOGD_WIFI, "Supplicant may not support AP mode; connection may time out.");
}
if (!nm_supplicant_config_add_setting_wireless (config,
s_wireless,
fixed_freq,
error)) {
g_prefix_error (error, "802-11-wireless: ");
goto error;
}
s_wireless_sec = nm_connection_get_setting_wireless_security (connection);
if (s_wireless_sec) {
NMSetting8021x *s_8021x;
const char *con_uuid = nm_connection_get_uuid (connection);
guint32 mtu = nm_platform_link_get_mtu (NM_PLATFORM_GET,
nm_device_get_ifindex (NM_DEVICE (self)));
g_assert (con_uuid);
s_8021x = nm_connection_get_setting_802_1x (connection);
if (!nm_supplicant_config_add_setting_wireless_security (config,
s_wireless_sec,
s_8021x,
con_uuid,
mtu,
error)) {
g_prefix_error (error, "802-11-wireless-security: ");
goto error;
}
} else {
if (!nm_supplicant_config_add_no_security (config, error)) {
g_prefix_error (error, "unsecured-option: ");
goto error;
}
}
return config;
error:
g_object_unref (config);
return NULL;
}
/*****************************************************************************/
static NMActStageReturn
act_stage1_prepare (NMDevice *device, NMDeviceStateReason *reason)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMActStageReturn ret;
NMWifiAP *ap = NULL;
NMActRequest *req;
NMConnection *connection;
NMSettingWireless *s_wireless;
const char *mode;
const char *ap_path;
ret = NM_DEVICE_CLASS (nm_device_wifi_parent_class)->act_stage1_prepare (device, reason);
if (ret != NM_ACT_STAGE_RETURN_SUCCESS)
return ret;
req = nm_device_get_act_request (NM_DEVICE (self));
g_return_val_if_fail (req != NULL, NM_ACT_STAGE_RETURN_FAILURE);
connection = nm_act_request_get_applied_connection (req);
g_return_val_if_fail (connection != NULL, NM_ACT_STAGE_RETURN_FAILURE);
s_wireless = nm_connection_get_setting_wireless (connection);
g_assert (s_wireless);
mode = nm_setting_wireless_get_mode (s_wireless);
if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_INFRA) == 0)
priv->mode = NM_802_11_MODE_INFRA;
else if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) == 0)
priv->mode = NM_802_11_MODE_ADHOC;
else if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_AP) == 0) {
priv->mode = NM_802_11_MODE_AP;
/* Scanning not done in AP mode; clear the scan list */
remove_all_aps (self);
}
_notify (self, PROP_MODE);
/* The kernel doesn't support Ad-Hoc WPA connections well at this time,
* and turns them into open networks. It's been this way since at least
* 2.6.30 or so; until that's fixed, disable WPA-protected Ad-Hoc networks.
*/
if (is_adhoc_wpa (connection)) {
_LOGW (LOGD_WIFI, "Ad-Hoc WPA disabled due to kernel bugs");
*reason = NM_DEVICE_STATE_REASON_SUPPLICANT_CONFIG_FAILED;
return NM_ACT_STAGE_RETURN_FAILURE;
}
/* forget the temporary MAC address used during scanning */
g_clear_pointer (&priv->hw_addr_scan, g_free);
/* Set spoof MAC to the interface */
if (!nm_device_hw_addr_set_cloned (device, connection, TRUE))
return NM_ACT_STAGE_RETURN_FAILURE;
/* AP mode never uses a specific object or existing scanned AP */
if (priv->mode != NM_802_11_MODE_AP) {
ap_path = nm_active_connection_get_specific_object (NM_ACTIVE_CONNECTION (req));
ap = ap_path ? get_ap_by_path (self, ap_path) : NULL;
if (ap)
goto done;
ap = find_first_compatible_ap (self, connection, FALSE);
}
if (ap) {
nm_active_connection_set_specific_object (NM_ACTIVE_CONNECTION (req),
nm_exported_object_get_path (NM_EXPORTED_OBJECT (ap)));
goto done;
}
/* If the user is trying to connect to an AP that NM doesn't yet know about
* (hidden network or something) or starting a Hotspot, create an fake AP
* from the security settings in the connection. This "fake" AP gets used
* until the real one is found in the scan list (Ad-Hoc or Hidden), or until
* the device is deactivated (Hotspot).
*/
ap = nm_wifi_ap_new_fake_from_connection (connection);
g_return_val_if_fail (ap != NULL, NM_ACT_STAGE_RETURN_FAILURE);
if (nm_wifi_ap_is_hotspot (ap))
nm_wifi_ap_set_address (ap, nm_device_get_hw_address (device));
g_object_freeze_notify (G_OBJECT (self));
ap_add_remove (self, ACCESS_POINT_ADDED, ap, TRUE);
g_object_thaw_notify (G_OBJECT (self));
set_current_ap (self, ap, FALSE);
nm_active_connection_set_specific_object (NM_ACTIVE_CONNECTION (req),
nm_exported_object_get_path (NM_EXPORTED_OBJECT (ap)));
return NM_ACT_STAGE_RETURN_SUCCESS;
done:
set_current_ap (self, ap, TRUE);
return NM_ACT_STAGE_RETURN_SUCCESS;
}
static void
ensure_hotspot_frequency (NMDeviceWifi *self,
NMSettingWireless *s_wifi,
NMWifiAP *ap)
{
const char *band = nm_setting_wireless_get_band (s_wifi);
const guint32 a_freqs[] = { 5180, 5200, 5220, 5745, 5765, 5785, 5805, 0 };
const guint32 bg_freqs[] = { 2412, 2437, 2462, 2472, 0 };
guint32 freq = 0;
g_assert (ap);
if (nm_wifi_ap_get_freq (ap))
return;
if (g_strcmp0 (band, "a") == 0)
freq = nm_platform_wifi_find_frequency (NM_PLATFORM_GET, nm_device_get_ifindex (NM_DEVICE (self)), a_freqs);
else
freq = nm_platform_wifi_find_frequency (NM_PLATFORM_GET, nm_device_get_ifindex (NM_DEVICE (self)), bg_freqs);
if (!freq)
freq = (g_strcmp0 (band, "a") == 0) ? 5180 : 2462;
nm_wifi_ap_set_freq (ap, freq);
}
static void
set_powersave (NMDevice *device)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMSettingWireless *s_wireless;
NMSettingWirelessPowersave powersave;
gs_free char *value = NULL;
s_wireless = (NMSettingWireless *) nm_device_get_applied_setting (device, NM_TYPE_SETTING_WIRELESS);
g_return_if_fail (s_wireless);
powersave = nm_setting_wireless_get_powersave (s_wireless);
if (powersave == NM_SETTING_WIRELESS_POWERSAVE_DEFAULT) {
value = nm_config_data_get_connection_default (NM_CONFIG_GET_DATA,
"wifi.powersave",
device);
powersave = _nm_utils_ascii_str_to_int64 (value, 10,
NM_SETTING_WIRELESS_POWERSAVE_IGNORE,
NM_SETTING_WIRELESS_POWERSAVE_ENABLE,
NM_SETTING_WIRELESS_POWERSAVE_IGNORE);
}
_LOGT (LOGD_WIFI, "powersave is set to %u", (unsigned int) powersave);
if (powersave == NM_SETTING_WIRELESS_POWERSAVE_IGNORE)
return;
nm_platform_wifi_set_powersave (NM_PLATFORM_GET,
nm_device_get_ifindex (device),
powersave == NM_SETTING_WIRELESS_POWERSAVE_ENABLE);
}
static NMActStageReturn
act_stage2_config (NMDevice *device, NMDeviceStateReason *reason)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMActStageReturn ret = NM_ACT_STAGE_RETURN_FAILURE;
NMSupplicantConfig *config = NULL;
NMActRequest *req;
NMWifiAP *ap;
NMConnection *connection;
const char *setting_name;
NMSettingWireless *s_wireless;
GError *error = NULL;
g_return_val_if_fail (reason != NULL, NM_ACT_STAGE_RETURN_FAILURE);
remove_supplicant_timeouts (self);
req = nm_device_get_act_request (device);
g_assert (req);
ap = priv->current_ap;
if (!ap) {
*reason = NM_DEVICE_STATE_REASON_SUPPLICANT_FAILED;
goto out;
}
connection = nm_act_request_get_applied_connection (req);
g_assert (connection);
s_wireless = nm_connection_get_setting_wireless (connection);
g_assert (s_wireless);
/* If we need secrets, get them */
setting_name = nm_connection_need_secrets (connection, NULL);
if (setting_name) {
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) access point '%s' has security, but secrets are required.",
nm_connection_get_id (connection));
ret = handle_auth_or_fail (self, req, FALSE);
if (ret == NM_ACT_STAGE_RETURN_FAILURE)
*reason = NM_DEVICE_STATE_REASON_NO_SECRETS;
goto out;
}
/* have secrets, or no secrets required */
if (nm_connection_get_setting_wireless_security (connection)) {
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) connection '%s' has security, and secrets exist. No new secrets needed.",
nm_connection_get_id (connection));
} else {
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) connection '%s' requires no security. No secrets needed.",
nm_connection_get_id (connection));
}
priv->ssid_found = FALSE;
/* Supplicant requires an initial frequency for Ad-Hoc and Hotspot; if the user
* didn't specify one and we didn't find an AP that matched the connection,
* just pick a frequency the device supports.
*/
if ((nm_wifi_ap_get_mode (ap) == NM_802_11_MODE_ADHOC) || nm_wifi_ap_is_hotspot (ap))
ensure_hotspot_frequency (self, s_wireless, ap);
if (nm_wifi_ap_get_mode (ap) == NM_802_11_MODE_INFRA)
set_powersave (device);
/* Build up the supplicant configuration */
config = build_supplicant_config (self, connection, nm_wifi_ap_get_freq (ap), &error);
if (config == NULL) {
_LOGE (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) couldn't build wireless configuration: %s",
error->message);
g_clear_error (&error);
*reason = NM_DEVICE_STATE_REASON_SUPPLICANT_CONFIG_FAILED;
goto out;
}
/* Hook up error signal handler to capture association errors */
g_signal_connect (priv->sup_iface,
NM_SUPPLICANT_INTERFACE_CONNECTION_ERROR,
G_CALLBACK (supplicant_iface_connection_error_cb),
self);
if (!nm_supplicant_interface_set_config (priv->sup_iface, config, &error)) {
_LOGE (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) couldn't send wireless configuration to the supplicant: %s",
error->message);
g_clear_error (&error);
*reason = NM_DEVICE_STATE_REASON_SUPPLICANT_CONFIG_FAILED;
goto out;
}
/* Set up a timeout on the association attempt to fail after 25 seconds */
priv->sup_timeout_id = g_timeout_add_seconds (25, supplicant_connection_timeout_cb, self);
if (!priv->periodic_source_id)
priv->periodic_source_id = g_timeout_add_seconds (6, periodic_update_cb, self);
/* We'll get stage3 started when the supplicant connects */
ret = NM_ACT_STAGE_RETURN_POSTPONE;
out:
if (ret == NM_ACT_STAGE_RETURN_FAILURE)
cleanup_association_attempt (self, TRUE);
if (config) {
/* Supplicant interface object refs the config; we no longer care about
* it after this function.
*/
g_object_unref (config);
}
return ret;
}
static NMActStageReturn
act_stage3_ip4_config_start (NMDevice *device,
NMIP4Config **out_config,
NMDeviceStateReason *reason)
{
NMConnection *connection;
NMSettingIPConfig *s_ip4;
const char *method = NM_SETTING_IP4_CONFIG_METHOD_AUTO;
connection = nm_device_get_applied_connection (device);
g_assert (connection);
s_ip4 = nm_connection_get_setting_ip4_config (connection);
if (s_ip4)
method = nm_setting_ip_config_get_method (s_ip4);
/* Indicate that a critical protocol is about to start */
if (strcmp (method, NM_SETTING_IP4_CONFIG_METHOD_AUTO) == 0)
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, nm_device_get_ifindex (device), TRUE);
return NM_DEVICE_CLASS (nm_device_wifi_parent_class)->act_stage3_ip4_config_start (device, out_config, reason);
}
static NMActStageReturn
act_stage3_ip6_config_start (NMDevice *device,
NMIP6Config **out_config,
NMDeviceStateReason *reason)
{
NMConnection *connection;
NMSettingIPConfig *s_ip6;
const char *method = NM_SETTING_IP6_CONFIG_METHOD_AUTO;
connection = nm_device_get_applied_connection (device);
g_assert (connection);
s_ip6 = nm_connection_get_setting_ip6_config (connection);
if (s_ip6)
method = nm_setting_ip_config_get_method (s_ip6);
/* Indicate that a critical protocol is about to start */
if (strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_AUTO) == 0 ||
strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_DHCP) == 0)
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, nm_device_get_ifindex (device), TRUE);
return NM_DEVICE_CLASS (nm_device_wifi_parent_class)->act_stage3_ip6_config_start (device, out_config, reason);
}
static guint32
get_configured_mtu (NMDevice *device, gboolean *out_is_user_config)
{
NMSettingWireless *setting;
gint64 mtu_default;
guint32 mtu;
nm_assert (NM_IS_DEVICE (device));
nm_assert (out_is_user_config);
setting = NM_SETTING_WIRELESS (nm_device_get_applied_setting (device, NM_TYPE_SETTING_WIRELESS));
if (!setting)
g_return_val_if_reached (0);
mtu = nm_setting_wireless_get_mtu (setting);
if (mtu == 0) {
mtu_default = nm_device_get_configured_mtu_from_connection_default (device, "wifi.mtu");
if (mtu_default >= 0) {
*out_is_user_config = TRUE;
return (guint32) mtu_default;
}
}
*out_is_user_config = (mtu != 0);
return mtu ?: NM_DEVICE_DEFAULT_MTU_WIRELESS;
}
static gboolean
is_static_wep (NMConnection *connection)
{
NMSettingWirelessSecurity *s_wsec;
const char *str;
g_return_val_if_fail (connection != NULL, FALSE);
s_wsec = nm_connection_get_setting_wireless_security (connection);
if (!s_wsec)
return FALSE;
str = nm_setting_wireless_security_get_key_mgmt (s_wsec);
if (g_strcmp0 (str, "none") != 0)
return FALSE;
str = nm_setting_wireless_security_get_auth_alg (s_wsec);
if (g_strcmp0 (str, "leap") == 0)
return FALSE;
return TRUE;
}
static NMActStageReturn
handle_ip_config_timeout (NMDeviceWifi *self,
NMConnection *connection,
gboolean may_fail,
gboolean *chain_up,
NMDeviceStateReason *reason)
{
NMActStageReturn ret = NM_ACT_STAGE_RETURN_FAILURE;
g_return_val_if_fail (connection != NULL, NM_ACT_STAGE_RETURN_FAILURE);
if (NM_DEVICE_WIFI_GET_PRIVATE (self)->mode == NM_802_11_MODE_AP) {
*chain_up = TRUE;
return ret;
}
/* If IP configuration times out and it's a static WEP connection, that
* usually means the WEP key is wrong. WEP's Open System auth mode has
* no provision for figuring out if the WEP key is wrong, so you just have
* to wait for DHCP to fail to figure it out. For all other WiFi security
* types (open, WPA, 802.1x, etc) if the secrets/certs were wrong the
* connection would have failed before IP configuration.
*/
if (!may_fail && is_static_wep (connection)) {
/* Activation failed, we must have bad encryption key */
_LOGW (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) could not get IP configuration for connection '%s'.",
nm_connection_get_id (connection));
ret = handle_auth_or_fail (self, NULL, TRUE);
if (ret == NM_ACT_STAGE_RETURN_POSTPONE) {
_LOGI (LOGD_DEVICE | LOGD_WIFI,
"Activation: (wifi) asking for new secrets");
} else {
*reason = NM_DEVICE_STATE_REASON_NO_SECRETS;
}
} else {
/* Not static WEP or failure allowed; let superclass handle it */
*chain_up = TRUE;
}
return ret;
}
static NMActStageReturn
act_stage4_ip4_config_timeout (NMDevice *device, NMDeviceStateReason *reason)
{
NMConnection *connection;
NMSettingIPConfig *s_ip4;
gboolean may_fail = FALSE, chain_up = FALSE;
NMActStageReturn ret;
connection = nm_device_get_applied_connection (device);
g_assert (connection);
s_ip4 = nm_connection_get_setting_ip4_config (connection);
may_fail = nm_setting_ip_config_get_may_fail (s_ip4);
ret = handle_ip_config_timeout (NM_DEVICE_WIFI (device), connection, may_fail, &chain_up, reason);
if (chain_up)
ret = NM_DEVICE_CLASS (nm_device_wifi_parent_class)->act_stage4_ip4_config_timeout (device, reason);
return ret;
}
static NMActStageReturn
act_stage4_ip6_config_timeout (NMDevice *device, NMDeviceStateReason *reason)
{
NMConnection *connection;
NMSettingIPConfig *s_ip6;
gboolean may_fail = FALSE, chain_up = FALSE;
NMActStageReturn ret;
connection = nm_device_get_applied_connection (device);
g_assert (connection);
s_ip6 = nm_connection_get_setting_ip6_config (connection);
may_fail = nm_setting_ip_config_get_may_fail (s_ip6);
ret = handle_ip_config_timeout (NM_DEVICE_WIFI (device), connection, may_fail, &chain_up, reason);
if (chain_up)
ret = NM_DEVICE_CLASS (nm_device_wifi_parent_class)->act_stage4_ip6_config_timeout (device, reason);
return ret;
}
static void
activation_success_handler (NMDevice *device)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
int ifindex = nm_device_get_ifindex (device);
NMActRequest *req;
NMConnection *applied_connection;
req = nm_device_get_act_request (device);
g_assert (req);
applied_connection = nm_act_request_get_applied_connection (req);
/* Clear any critical protocol notification in the wifi stack */
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, ifindex, FALSE);
/* Clear wireless secrets tries on success */
g_object_set_data (G_OBJECT (applied_connection), WIRELESS_SECRETS_TRIES, NULL);
/* There should always be a current AP, either a fake one because we haven't
* seen a scan result for the activated AP yet, or a real one from the
* supplicant's scan list.
*/
g_warn_if_fail (priv->current_ap);
if (priv->current_ap) {
if (nm_wifi_ap_get_fake (priv->current_ap)) {
/* If the activation AP hasn't been seen by the supplicant in a scan
* yet, it will be "fake". This usually happens for Ad-Hoc and
* AP-mode connections. Fill in the details from the device itself
* until the supplicant sends the scan result.
*/
if (!nm_wifi_ap_get_address (priv->current_ap)) {
guint8 bssid[ETH_ALEN] = { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
gs_free char *bssid_str = NULL;
if ( nm_platform_wifi_get_bssid (NM_PLATFORM_GET, ifindex, bssid)
&& nm_ethernet_address_is_valid (bssid, ETH_ALEN)) {
bssid_str = nm_utils_hwaddr_ntoa (bssid, ETH_ALEN);
nm_wifi_ap_set_address (priv->current_ap, bssid_str);
}
}
if (!nm_wifi_ap_get_freq (priv->current_ap))
nm_wifi_ap_set_freq (priv->current_ap, nm_platform_wifi_get_frequency (NM_PLATFORM_GET, ifindex));
if (!nm_wifi_ap_get_max_bitrate (priv->current_ap))
nm_wifi_ap_set_max_bitrate (priv->current_ap, nm_platform_wifi_get_rate (NM_PLATFORM_GET, ifindex));
}
nm_active_connection_set_specific_object (NM_ACTIVE_CONNECTION (req),
nm_exported_object_get_path (NM_EXPORTED_OBJECT (priv->current_ap)));
}
periodic_update (self);
update_seen_bssids_cache (self, priv->current_ap);
/* Reset scan interval to something reasonable */
priv->scan_interval = SCAN_INTERVAL_MIN + (SCAN_INTERVAL_STEP * 2);
}
static void
activation_failure_handler (NMDevice *device)
{
NMConnection *applied_connection;
applied_connection = nm_device_get_applied_connection (device);
g_assert (applied_connection);
/* Clear wireless secrets tries on failure */
g_object_set_data (G_OBJECT (applied_connection), WIRELESS_SECRETS_TRIES, NULL);
/* Clear any critical protocol notification in the wifi stack */
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, nm_device_get_ifindex (device), FALSE);
}
static void
device_state_changed (NMDevice *device,
NMDeviceState new_state,
NMDeviceState old_state,
NMDeviceStateReason reason)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
gboolean clear_aps = FALSE;
if (new_state > NM_DEVICE_STATE_ACTIVATED)
wifi_secrets_cancel (self);
if (new_state <= NM_DEVICE_STATE_UNAVAILABLE) {
/* Clean up the supplicant interface because in these states the
* device cannot be used.
*/
if (priv->sup_iface)
supplicant_interface_release (self);
nm_clear_g_source (&priv->periodic_source_id);
cleanup_association_attempt (self, TRUE);
cleanup_supplicant_failures (self);
remove_all_aps (self);
}
switch (new_state) {
case NM_DEVICE_STATE_UNMANAGED:
clear_aps = TRUE;
break;
case NM_DEVICE_STATE_UNAVAILABLE:
/* If the device is enabled and the supplicant manager is ready,
* acquire a supplicant interface and transition to DISCONNECTED because
* the device is now ready to use.
*/
if (priv->enabled && (nm_device_get_firmware_missing (device) == FALSE)) {
if (!priv->sup_iface)
supplicant_interface_acquire (self);
}
clear_aps = TRUE;
break;
case NM_DEVICE_STATE_NEED_AUTH:
if (priv->sup_iface)
nm_supplicant_interface_disconnect (priv->sup_iface);
break;
case NM_DEVICE_STATE_IP_CHECK:
/* Clear any critical protocol notification in the wifi stack */
nm_platform_wifi_indicate_addressing_running (NM_PLATFORM_GET, nm_device_get_ifindex (device), FALSE);
break;
case NM_DEVICE_STATE_ACTIVATED:
activation_success_handler (device);
break;
case NM_DEVICE_STATE_FAILED:
activation_failure_handler (device);
break;
case NM_DEVICE_STATE_DISCONNECTED:
/* Kick off a scan to get latest results */
priv->scan_interval = SCAN_INTERVAL_MIN;
request_wireless_scan (self, NULL);
break;
default:
break;
}
if (clear_aps)
remove_all_aps (self);
}
static gboolean
get_enabled (NMDevice *device)
{
return NM_DEVICE_WIFI_GET_PRIVATE ((NMDeviceWifi *) device)->enabled;
}
static void
set_enabled (NMDevice *device, gboolean enabled)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (device);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
NMDeviceState state;
enabled = !!enabled;
if (priv->enabled == enabled)
return;
priv->enabled = enabled;
_LOGD (LOGD_WIFI, "device now %s", enabled ? "enabled" : "disabled");
state = nm_device_get_state (NM_DEVICE (self));
if (state < NM_DEVICE_STATE_UNAVAILABLE) {
_LOGD (LOGD_WIFI, "(%s): device blocked by UNMANAGED state",
enabled ? "enable" : "disable");
return;
}
if (enabled) {
gboolean no_firmware = FALSE;
if (state != NM_DEVICE_STATE_UNAVAILABLE)
_LOGW (LOGD_CORE, "not in expected unavailable state!");
if (!nm_device_bring_up (NM_DEVICE (self), TRUE, &no_firmware)) {
_LOGD (LOGD_WIFI, "enable blocked by failure to bring device up");
if (no_firmware)
nm_device_set_firmware_missing (NM_DEVICE (device), TRUE);
else {
/* The device sucks, or the kernel was lying to us about the killswitch state */
priv->enabled = FALSE;
}
return;
}
/* Re-initialize the supplicant interface and wait for it to be ready */
cleanup_supplicant_failures (self);
if (priv->sup_iface)
supplicant_interface_release (self);
supplicant_interface_acquire (self);
_LOGD (LOGD_WIFI, "enable waiting on supplicant state");
} else {
nm_device_state_changed (NM_DEVICE (self),
NM_DEVICE_STATE_UNAVAILABLE,
NM_DEVICE_STATE_REASON_NONE);
nm_device_take_down (NM_DEVICE (self), TRUE);
}
}
/*****************************************************************************/
NMDevice *
nm_device_wifi_new (const char *iface, NMDeviceWifiCapabilities capabilities)
{
return g_object_new (NM_TYPE_DEVICE_WIFI,
NM_DEVICE_IFACE, iface,
NM_DEVICE_TYPE_DESC, "802.11 WiFi",
NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_WIFI,
NM_DEVICE_LINK_TYPE, NM_LINK_TYPE_WIFI,
NM_DEVICE_RFKILL_TYPE, RFKILL_TYPE_WLAN,
NM_DEVICE_WIFI_CAPABILITIES, (guint) capabilities,
NULL);
}
static void
nm_device_wifi_init (NMDeviceWifi *self)
{
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
priv->mode = NM_802_11_MODE_INFRA;
priv->aps = g_hash_table_new (g_str_hash, g_str_equal);
}
static void
dispose (GObject *object)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (object);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
nm_clear_g_source (&priv->periodic_source_id);
wifi_secrets_cancel (self);
cleanup_association_attempt (self, TRUE);
supplicant_interface_release (self);
cleanup_supplicant_failures (self);
g_clear_object (&priv->sup_mgr);
remove_all_aps (self);
G_OBJECT_CLASS (nm_device_wifi_parent_class)->dispose (object);
}
static void
finalize (GObject *object)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (object);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
nm_assert (g_hash_table_size (priv->aps) == 0);
g_hash_table_unref (priv->aps);
g_free (priv->hw_addr_scan);
G_OBJECT_CLASS (nm_device_wifi_parent_class)->finalize (object);
}
static void
get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
NMDeviceWifi *self = NM_DEVICE_WIFI (object);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (self);
gsize i;
char **list;
switch (prop_id) {
case PROP_MODE:
g_value_set_uint (value, priv->mode);
break;
case PROP_BITRATE:
g_value_set_uint (value, priv->rate);
break;
case PROP_CAPABILITIES:
g_value_set_uint (value, priv->capabilities);
break;
case PROP_ACCESS_POINTS:
list = (char **) ap_list_get_sorted_paths (self, TRUE);
for (i = 0; list[i]; i++)
list[i] = g_strdup (list[i]);
g_value_take_boxed (value, list);
break;
case PROP_ACTIVE_ACCESS_POINT:
nm_utils_g_value_set_object_path (value, priv->current_ap);
break;
case PROP_SCANNING:
g_value_set_boolean (value, nm_supplicant_interface_get_scanning (priv->sup_iface));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
NMDeviceWifi *device = NM_DEVICE_WIFI (object);
NMDeviceWifiPrivate *priv = NM_DEVICE_WIFI_GET_PRIVATE (device);
switch (prop_id) {
case PROP_CAPABILITIES:
/* construct-only */
priv->capabilities = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
nm_device_wifi_class_init (NMDeviceWifiClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
NMDeviceClass *parent_class = NM_DEVICE_CLASS (klass);
NM_DEVICE_CLASS_DECLARE_TYPES (klass, NM_SETTING_WIRELESS_SETTING_NAME, NM_LINK_TYPE_WIFI)
object_class->constructed = constructed;
object_class->get_property = get_property;
object_class->set_property = set_property;
object_class->dispose = dispose;
object_class->finalize = finalize;
parent_class->can_auto_connect = can_auto_connect;
parent_class->is_available = is_available;
parent_class->check_connection_compatible = check_connection_compatible;
parent_class->check_connection_available = check_connection_available;
parent_class->complete_connection = complete_connection;
parent_class->get_enabled = get_enabled;
parent_class->set_enabled = set_enabled;
parent_class->act_stage1_prepare = act_stage1_prepare;
parent_class->act_stage2_config = act_stage2_config;
parent_class->get_configured_mtu = get_configured_mtu;
parent_class->act_stage3_ip4_config_start = act_stage3_ip4_config_start;
parent_class->act_stage3_ip6_config_start = act_stage3_ip6_config_start;
parent_class->act_stage4_ip4_config_timeout = act_stage4_ip4_config_timeout;
parent_class->act_stage4_ip6_config_timeout = act_stage4_ip6_config_timeout;
parent_class->deactivate = deactivate;
parent_class->deactivate_reset_hw_addr = deactivate_reset_hw_addr;
parent_class->unmanaged_on_quit = unmanaged_on_quit;
parent_class->state_changed = device_state_changed;
klass->scanning_allowed = scanning_allowed;
obj_properties[PROP_MODE] =
g_param_spec_uint (NM_DEVICE_WIFI_MODE, "", "",
NM_802_11_MODE_UNKNOWN,
NM_802_11_MODE_AP,
NM_802_11_MODE_INFRA,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
obj_properties[PROP_BITRATE] =
g_param_spec_uint (NM_DEVICE_WIFI_BITRATE, "", "",
0, G_MAXUINT32, 0,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
obj_properties[PROP_ACCESS_POINTS] =
g_param_spec_boxed (NM_DEVICE_WIFI_ACCESS_POINTS, "", "",
G_TYPE_STRV,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
obj_properties[PROP_ACTIVE_ACCESS_POINT] =
g_param_spec_string (NM_DEVICE_WIFI_ACTIVE_ACCESS_POINT, "", "",
NULL,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
obj_properties[PROP_CAPABILITIES] =
g_param_spec_uint (NM_DEVICE_WIFI_CAPABILITIES, "", "",
0, G_MAXUINT32, NM_WIFI_DEVICE_CAP_NONE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
obj_properties[PROP_SCANNING] =
g_param_spec_boolean (NM_DEVICE_WIFI_SCANNING, "", "",
FALSE,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, _PROPERTY_ENUMS_LAST, obj_properties);
signals[ACCESS_POINT_ADDED] =
g_signal_new (NM_DEVICE_WIFI_ACCESS_POINT_ADDED,
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 1,
NM_TYPE_WIFI_AP);
signals[ACCESS_POINT_REMOVED] =
g_signal_new (NM_DEVICE_WIFI_ACCESS_POINT_REMOVED,
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
0,
NULL, NULL, NULL,
G_TYPE_NONE, 1,
NM_TYPE_WIFI_AP);
signals[SCANNING_ALLOWED] =
g_signal_new (NM_DEVICE_WIFI_SCANNING_ALLOWED,
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (NMDeviceWifiClass, scanning_allowed),
scanning_allowed_accumulator, NULL, NULL,
G_TYPE_BOOLEAN, 0);
nm_exported_object_class_add_interface (NM_EXPORTED_OBJECT_CLASS (klass),
NMDBUS_TYPE_DEVICE_WIFI_SKELETON,
"GetAccessPoints", impl_device_wifi_get_access_points,
"GetAllAccessPoints", impl_device_wifi_get_all_access_points,
"RequestScan", impl_device_wifi_request_scan,
NULL);
}
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