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NetworkManager/src/nm-policy.c

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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) 2004 - 2011 Red Hat, Inc.
* Copyright (C) 2007 - 2008 Novell, Inc.
*/
#include <config.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <ctype.h>
#include "nm-policy.h"
#include "NetworkManagerUtils.h"
#include "nm-wifi-ap.h"
#include "nm-activation-request.h"
#include "nm-logging.h"
#include "nm-device-interface.h"
#include "nm-device.h"
#include "nm-device-wifi.h"
#include "nm-device-ethernet.h"
#include "nm-device-modem.h"
#if WITH_WIMAX
#include "nm-device-wimax.h"
#endif
#include "nm-dbus-manager.h"
#include "nm-setting-ip4-config.h"
#include "nm-setting-connection.h"
#include "nm-system.h"
#include "nm-dns-manager.h"
#include "nm-vpn-manager.h"
#include "nm-policy-hostname.h"
#include "nm-manager-auth.h"
struct NMPolicy {
NMManager *manager;
guint update_state_id;
GSList *pending_activation_checks;
GSList *manager_ids;
GSList *settings_ids;
GSList *dev_ids;
NMVPNManager *vpn_manager;
gulong vpn_activated_id;
gulong vpn_deactivated_id;
NMSettings *settings;
NMDevice *default_device4;
NMDevice *default_device6;
HostnameThread *lookup;
gint reset_retries_id; /* idle handler for resetting the retries count */
char *orig_hostname; /* hostname at NM start time */
char *cur_hostname; /* hostname we want to assign */
};
#define RETRIES_TAG "autoconnect-retries"
#define RETRIES_DEFAULT 4
#define RESET_RETRIES_TIMESTAMP_TAG "reset-retries-timestamp-tag"
#define RESET_RETRIES_TIMER 300
#define FAILURE_REASON_TAG "failure-reason"
static NMDevice *
get_best_ip4_device (NMManager *manager, NMActRequest **out_req)
{
GSList *devices, *iter;
NMDevice *best = NULL;
int best_prio = G_MAXINT;
g_return_val_if_fail (manager != NULL, NULL);
g_return_val_if_fail (NM_IS_MANAGER (manager), NULL);
g_return_val_if_fail (out_req != NULL, NULL);
g_return_val_if_fail (*out_req == NULL, NULL);
devices = nm_manager_get_devices (manager);
for (iter = devices; iter; iter = g_slist_next (iter)) {
NMDevice *dev = NM_DEVICE (iter->data);
NMActRequest *req;
NMConnection *connection;
NMIP4Config *ip4_config;
NMSettingIP4Config *s_ip4;
int prio;
guint i;
gboolean can_default = FALSE;
const char *method = NULL;
if (nm_device_get_state (dev) != NM_DEVICE_STATE_ACTIVATED)
continue;
ip4_config = nm_device_get_ip4_config (dev);
if (!ip4_config)
continue;
req = nm_device_get_act_request (dev);
g_assert (req);
connection = nm_act_request_get_connection (req);
g_assert (connection);
/* Never set the default route through an IPv4LL-addressed device */
s_ip4 = (NMSettingIP4Config *) nm_connection_get_setting (connection, NM_TYPE_SETTING_IP4_CONFIG);
if (s_ip4)
method = nm_setting_ip4_config_get_method (s_ip4);
if (s_ip4 && !strcmp (method, NM_SETTING_IP4_CONFIG_METHOD_LINK_LOCAL))
continue;
/* Make sure at least one of this device's IP addresses has a gateway */
for (i = 0; i < nm_ip4_config_get_num_addresses (ip4_config); i++) {
NMIP4Address *addr;
addr = nm_ip4_config_get_address (ip4_config, i);
if (nm_ip4_address_get_gateway (addr)) {
can_default = TRUE;
break;
}
}
if (!can_default && !NM_IS_DEVICE_MODEM (dev))
continue;
/* 'never-default' devices can't ever be the default */
if ( (s_ip4 && nm_setting_ip4_config_get_never_default (s_ip4))
|| nm_ip4_config_get_never_default (ip4_config))
continue;
prio = nm_device_get_priority (dev);
if (prio > 0 && prio < best_prio) {
best = dev;
best_prio = prio;
*out_req = req;
}
}
return best;
}
static NMDevice *
get_best_ip6_device (NMManager *manager, NMActRequest **out_req)
{
GSList *devices, *iter;
NMDevice *best = NULL;
int best_prio = G_MAXINT;
g_return_val_if_fail (manager != NULL, NULL);
g_return_val_if_fail (NM_IS_MANAGER (manager), NULL);
g_return_val_if_fail (out_req != NULL, NULL);
g_return_val_if_fail (*out_req == NULL, NULL);
devices = nm_manager_get_devices (manager);
for (iter = devices; iter; iter = g_slist_next (iter)) {
NMDevice *dev = NM_DEVICE (iter->data);
NMActRequest *req;
NMConnection *connection;
NMIP6Config *ip6_config;
NMSettingIP6Config *s_ip6;
int prio;
guint i;
gboolean can_default = FALSE;
const char *method = NULL;
if (nm_device_get_state (dev) != NM_DEVICE_STATE_ACTIVATED)
continue;
ip6_config = nm_device_get_ip6_config (dev);
if (!ip6_config)
continue;
req = nm_device_get_act_request (dev);
g_assert (req);
connection = nm_act_request_get_connection (req);
g_assert (connection);
/* Never set the default route through an IPv4LL-addressed device */
s_ip6 = (NMSettingIP6Config *) nm_connection_get_setting (connection, NM_TYPE_SETTING_IP6_CONFIG);
if (s_ip6)
method = nm_setting_ip6_config_get_method (s_ip6);
if (method && !strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_LINK_LOCAL))
continue;
/* Make sure at least one of this device's IP addresses has a gateway */
for (i = 0; i < nm_ip6_config_get_num_addresses (ip6_config); i++) {
NMIP6Address *addr;
addr = nm_ip6_config_get_address (ip6_config, i);
if (nm_ip6_address_get_gateway (addr)) {
can_default = TRUE;
break;
}
}
if (!can_default && !NM_IS_DEVICE_MODEM (dev))
continue;
/* 'never-default' devices can't ever be the default */
if (s_ip6 && nm_setting_ip6_config_get_never_default (s_ip6))
continue;
prio = nm_device_get_priority (dev);
if (prio > 0 && prio < best_prio) {
best = dev;
best_prio = prio;
*out_req = req;
}
}
return best;
}
static void
_set_hostname (NMPolicy *policy,
gboolean change_hostname,
const char *new_hostname,
const char *msg)
{
if (change_hostname) {
NMDnsManager *dns_mgr;
g_free (policy->cur_hostname);
policy->cur_hostname = g_strdup (new_hostname);
dns_mgr = nm_dns_manager_get (NULL);
nm_dns_manager_set_hostname (dns_mgr, policy->cur_hostname);
g_object_unref (dns_mgr);
}
if (nm_policy_set_system_hostname (policy->cur_hostname, msg))
nm_utils_call_dispatcher ("hostname", NULL, NULL, NULL, NULL, NULL);
}
static void
lookup_callback (HostnameThread *thread,
int result,
const char *hostname,
gpointer user_data)
{
NMPolicy *policy = (NMPolicy *) user_data;
char *msg;
/* Update the hostname if the calling lookup thread is the in-progress one */
if (!hostname_thread_is_dead (thread) && (thread == policy->lookup)) {
policy->lookup = NULL;
if (!hostname) {
/* Fall back to localhost.localdomain */
msg = g_strdup_printf ("address lookup failed: %d", result);
_set_hostname (policy, TRUE, NULL, msg);
g_free (msg);
} else
_set_hostname (policy, TRUE, hostname, "from address lookup");
}
hostname_thread_free (thread);
}
static void
update_system_hostname (NMPolicy *policy, NMDevice *best4, NMDevice *best6)
{
char *configured_hostname = NULL;
NMActRequest *best_req4 = NULL;
NMActRequest *best_req6 = NULL;
const char *dhcp_hostname, *p;
g_return_if_fail (policy != NULL);
if (policy->lookup) {
hostname_thread_kill (policy->lookup);
policy->lookup = NULL;
}
/* Hostname precedence order:
*
* 1) a configured hostname (from settings)
* 2) automatic hostname from the default device's config (DHCP, VPN, etc)
* 3) the original hostname when NM started
* 4) reverse-DNS of the best device's IPv4 address
*
*/
/* Try a persistent hostname first */
g_object_get (G_OBJECT (policy->manager), NM_MANAGER_HOSTNAME, &configured_hostname, NULL);
if (configured_hostname) {
_set_hostname (policy, TRUE, configured_hostname, "from system configuration");
g_free (configured_hostname);
return;
}
/* Try automatically determined hostname from the best device's IP config */
if (!best4)
best4 = get_best_ip4_device (policy->manager, &best_req4);
if (!best6)
best6 = get_best_ip6_device (policy->manager, &best_req6);
if (!best4 && !best6) {
/* No best device; fall back to original hostname or if there wasn't
* one, 'localhost.localdomain'
*/
_set_hostname (policy, TRUE, policy->orig_hostname, "no default device");
return;
}
if (best4) {
NMDHCP4Config *dhcp4_config;
/* Grab a hostname out of the device's DHCP4 config */
dhcp4_config = nm_device_get_dhcp4_config (best4);
if (dhcp4_config) {
p = dhcp_hostname = nm_dhcp4_config_get_option (dhcp4_config, "new_host_name");
if (dhcp_hostname && strlen (dhcp_hostname)) {
/* Sanity check; strip leading spaces */
while (*p) {
if (!isblank (*p++)) {
_set_hostname (policy, TRUE, p-1, "from DHCPv4");
return;
}
}
nm_log_warn (LOGD_DNS, "DHCPv4-provided hostname '%s' looks invalid; ignoring it",
dhcp_hostname);
}
}
} else if (best6) {
NMDHCP6Config *dhcp6_config;
/* Grab a hostname out of the device's DHCP6 config */
dhcp6_config = nm_device_get_dhcp6_config (best6);
if (dhcp6_config) {
p = dhcp_hostname = nm_dhcp6_config_get_option (dhcp6_config, "new_host_name");
if (dhcp_hostname && strlen (dhcp_hostname)) {
/* Sanity check; strip leading spaces */
while (*p) {
if (!isblank (*p++)) {
_set_hostname (policy, TRUE, p-1, "from DHCPv6");
return;
}
}
nm_log_warn (LOGD_DNS, "DHCPv6-provided hostname '%s' looks invalid; ignoring it",
dhcp_hostname);
}
}
}
/* If no automatically-configured hostname, try using the hostname from
* when NM started up.
*/
if (policy->orig_hostname) {
_set_hostname (policy, TRUE, policy->orig_hostname, "from system startup");
return;
}
/* No configured hostname, no automatically determined hostname, and no
* bootup hostname. Start reverse DNS of the current IPv4 or IPv6 address.
*/
if (best4) {
NMIP4Config *ip4_config;
NMIP4Address *addr4;
ip4_config = nm_device_get_ip4_config (best4);
if ( !ip4_config
|| (nm_ip4_config_get_num_nameservers (ip4_config) == 0)
|| (nm_ip4_config_get_num_addresses (ip4_config) == 0)) {
/* No valid IP4 config (!!); fall back to localhost.localdomain */
_set_hostname (policy, TRUE, NULL, "no IPv4 config");
return;
}
addr4 = nm_ip4_config_get_address (ip4_config, 0);
g_assert (addr4); /* checked for > 1 address above */
/* Start the hostname lookup thread */
policy->lookup = hostname4_thread_new (nm_ip4_address_get_address (addr4), lookup_callback, policy);
} else if (best6) {
NMIP6Config *ip6_config;
NMIP6Address *addr6;
ip6_config = nm_device_get_ip6_config (best6);
if ( !ip6_config
|| (nm_ip6_config_get_num_nameservers (ip6_config) == 0)
|| (nm_ip6_config_get_num_addresses (ip6_config) == 0)) {
/* No valid IP6 config (!!); fall back to localhost.localdomain */
_set_hostname (policy, TRUE, NULL, "no IPv6 config");
return;
}
addr6 = nm_ip6_config_get_address (ip6_config, 0);
g_assert (addr6); /* checked for > 1 address above */
/* Start the hostname lookup thread */
policy->lookup = hostname6_thread_new (nm_ip6_address_get_address (addr6), lookup_callback, policy);
}
if (!policy->lookup) {
/* Fall back to 'localhost.localdomain' */
_set_hostname (policy, TRUE, NULL, "error starting hostname thread");
}
}
static void
update_ip4_routing_and_dns (NMPolicy *policy, gboolean force_update)
{
NMDnsIPConfigType dns_type = NM_DNS_IP_CONFIG_TYPE_BEST_DEVICE;
NMDevice *best = NULL;
NMActRequest *best_req = NULL;
NMDnsManager *dns_mgr;
GSList *devices = NULL, *iter, *vpns;
NMIP4Config *ip4_config = NULL;
NMIP4Address *addr;
const char *ip_iface = NULL;
NMConnection *connection = NULL;
NMSettingConnection *s_con = NULL;
const char *connection_id;
int ip_ifindex = 0;
best = get_best_ip4_device (policy->manager, &best_req);
if (!best)
goto out;
if (!force_update && (best == policy->default_device4))
goto out;
/* If a VPN connection is active, it is preferred */
vpns = nm_vpn_manager_get_active_connections (policy->vpn_manager);
for (iter = vpns; iter; iter = g_slist_next (iter)) {
NMVPNConnection *candidate = NM_VPN_CONNECTION (iter->data);
NMConnection *vpn_connection;
NMSettingIP4Config *s_ip4;
gboolean can_default = TRUE;
NMVPNConnectionState vpn_state;
/* If it's marked 'never-default', don't make it default */
vpn_connection = nm_vpn_connection_get_connection (candidate);
g_assert (vpn_connection);
/* Check the active IP4 config from the VPN service daemon */
ip4_config = nm_vpn_connection_get_ip4_config (candidate);
if (ip4_config && nm_ip4_config_get_never_default (ip4_config))
can_default = FALSE;
/* Check the user's preference from the NMConnection */
s_ip4 = (NMSettingIP4Config *) nm_connection_get_setting (vpn_connection, NM_TYPE_SETTING_IP4_CONFIG);
if (s_ip4 && nm_setting_ip4_config_get_never_default (s_ip4))
can_default = FALSE;
vpn_state = nm_vpn_connection_get_vpn_state (candidate);
if (can_default && (vpn_state == NM_VPN_CONNECTION_STATE_ACTIVATED)) {
NMIP4Config *parent_ip4;
NMDevice *parent;
ip_iface = nm_vpn_connection_get_ip_iface (candidate);
ip_ifindex = nm_vpn_connection_get_ip_ifindex (candidate);
connection = nm_vpn_connection_get_connection (candidate);
addr = nm_ip4_config_get_address (ip4_config, 0);
parent = nm_vpn_connection_get_parent_device (candidate);
parent_ip4 = nm_device_get_ip4_config (parent);
nm_system_replace_default_ip4_route_vpn (ip_ifindex,
nm_ip4_address_get_gateway (addr),
nm_vpn_connection_get_ip4_internal_gateway (candidate),
nm_ip4_config_get_mss (ip4_config),
nm_device_get_ip_ifindex (parent),
nm_ip4_config_get_mss (parent_ip4));
dns_type = NM_DNS_IP_CONFIG_TYPE_VPN;
}
}
g_slist_free (vpns);
/* The best device gets the default route if a VPN connection didn't */
if (!ip_iface || !ip4_config) {
connection = nm_act_request_get_connection (best_req);
ip_iface = nm_device_get_ip_iface (best);
ip_ifindex = nm_device_get_ip_ifindex (best);
ip4_config = nm_device_get_ip4_config (best);
g_assert (ip4_config);
addr = nm_ip4_config_get_address (ip4_config, 0);
nm_system_replace_default_ip4_route (ip_ifindex,
nm_ip4_address_get_gateway (addr),
nm_ip4_config_get_mss (ip4_config));
dns_type = NM_DNS_IP_CONFIG_TYPE_BEST_DEVICE;
}
if (!ip_iface || !ip4_config) {
nm_log_warn (LOGD_CORE, "couldn't determine IP interface (%p) or IPv4 config (%p)!",
ip_iface, ip4_config);
goto out;
}
/* Update the default active connection. Only mark the new default
* active connection after setting default = FALSE on all other connections
* first. The order is important, we don't want two connections marked
* default at the same time ever.
*/
devices = nm_manager_get_devices (policy->manager);
for (iter = devices; iter; iter = g_slist_next (iter)) {
NMDevice *dev = NM_DEVICE (iter->data);
NMActRequest *req;
req = nm_device_get_act_request (dev);
if (req && (req != best_req))
nm_act_request_set_default (req, FALSE);
}
dns_mgr = nm_dns_manager_get (NULL);
nm_dns_manager_add_ip4_config (dns_mgr, ip_iface, ip4_config, dns_type);
g_object_unref (dns_mgr);
/* Now set new default active connection _after_ updating DNS info, so that
* if the connection is shared dnsmasq picks up the right stuff.
*/
if (best_req)
nm_act_request_set_default (best_req, TRUE);
if (connection)
s_con = (NMSettingConnection *) nm_connection_get_setting (connection, NM_TYPE_SETTING_CONNECTION);
connection_id = s_con ? nm_setting_connection_get_id (s_con) : NULL;
if (connection_id) {
nm_log_info (LOGD_CORE, "Policy set '%s' (%s) as default for IPv4 routing and DNS.", connection_id, ip_iface);
} else {
nm_log_info (LOGD_CORE, "Policy set (%s) as default for IPv4 routing and DNS.", ip_iface);
}
out:
policy->default_device4 = best;
}
static void
update_ip6_routing_and_dns (NMPolicy *policy, gboolean force_update)
{
NMDnsIPConfigType dns_type = NM_DNS_IP_CONFIG_TYPE_BEST_DEVICE;
NMDevice *best = NULL;
NMActRequest *best_req = NULL;
NMDnsManager *dns_mgr;
GSList *devices = NULL, *iter;
#if 0
GSList *vpns;
#endif
NMIP6Config *ip6_config = NULL;
NMIP6Address *addr;
const char *ip_iface = NULL;
int ip_ifindex = -1;
NMConnection *connection = NULL;
NMSettingConnection *s_con = NULL;
const char *connection_id;
best = get_best_ip6_device (policy->manager, &best_req);
if (!best)
goto out;
if (!force_update && (best == policy->default_device6))
goto out;
#if 0
/* If a VPN connection is active, it is preferred */
vpns = nm_vpn_manager_get_active_connections (policy->vpn_manager);
for (iter = vpns; iter; iter = g_slist_next (iter)) {
NMVPNConnection *candidate = NM_VPN_CONNECTION (iter->data);
NMConnection *vpn_connection;
NMSettingIP6Config *s_ip6;
gboolean can_default = TRUE;
NMVPNConnectionState vpn_state;
/* If it's marked 'never-default', don't make it default */
vpn_connection = nm_vpn_connection_get_connection (candidate);
g_assert (vpn_connection);
s_ip6 = (NMSettingIP6Config *) nm_connection_get_setting (vpn_connection, NM_TYPE_SETTING_IP6_CONFIG);
if (s_ip6 && nm_setting_ip6_config_get_never_default (s_ip6))
can_default = FALSE;
vpn_state = nm_vpn_connection_get_vpn_state (candidate);
if (can_default && (vpn_state == NM_VPN_CONNECTION_STATE_ACTIVATED)) {
NMIP6Config *parent_ip6;
NMDevice *parent;
ip_iface = nm_vpn_connection_get_ip_iface (candidate);
connection = nm_vpn_connection_get_connection (candidate);
ip6_config = nm_vpn_connection_get_ip6_config (candidate);
addr = nm_ip6_config_get_address (ip6_config, 0);
parent = nm_vpn_connection_get_parent_device (candidate);
parent_ip6 = nm_device_get_ip6_config (parent);
nm_system_replace_default_ip6_route_vpn (ip_iface,
nm_ip6_address_get_gateway (addr),
nm_vpn_connection_get_ip4_internal_gateway (candidate),
nm_ip6_config_get_mss (ip4_config),
nm_device_get_ip_iface (parent),
nm_ip6_config_get_mss (parent_ip4));
dns_type = NM_DNS_IP_CONFIG_TYPE_VPN;
}
}
g_slist_free (vpns);
#endif
/* The best device gets the default route if a VPN connection didn't */
if (!ip_iface || !ip6_config) {
connection = nm_act_request_get_connection (best_req);
ip_iface = nm_device_get_ip_iface (best);
ip_ifindex = nm_device_get_ip_ifindex (best);
ip6_config = nm_device_get_ip6_config (best);
g_assert (ip6_config);
addr = nm_ip6_config_get_address (ip6_config, 0);
nm_system_replace_default_ip6_route (ip_ifindex, nm_ip6_address_get_gateway (addr));
dns_type = NM_DNS_IP_CONFIG_TYPE_BEST_DEVICE;
}
if (!ip_iface || !ip6_config) {
nm_log_warn (LOGD_CORE, "couldn't determine IP interface (%p) or IPv6 config (%p)!",
ip_iface, ip6_config);
goto out;
}
/* Update the default active connection. Only mark the new default
* active connection after setting default = FALSE on all other connections
* first. The order is important, we don't want two connections marked
* default at the same time ever.
*/
devices = nm_manager_get_devices (policy->manager);
for (iter = devices; iter; iter = g_slist_next (iter)) {
NMDevice *dev = NM_DEVICE (iter->data);
NMActRequest *req;
req = nm_device_get_act_request (dev);
if (req && (req != best_req))
nm_act_request_set_default6 (req, FALSE);
}
dns_mgr = nm_dns_manager_get (NULL);
nm_dns_manager_add_ip6_config (dns_mgr, ip_iface, ip6_config, dns_type);
g_object_unref (dns_mgr);
/* Now set new default active connection _after_ updating DNS info, so that
* if the connection is shared dnsmasq picks up the right stuff.
*/
if (best_req)
nm_act_request_set_default6 (best_req, TRUE);
if (connection)
s_con = (NMSettingConnection *) nm_connection_get_setting (connection, NM_TYPE_SETTING_CONNECTION);
connection_id = s_con ? nm_setting_connection_get_id (s_con) : NULL;
if (connection_id) {
nm_log_info (LOGD_CORE, "Policy set '%s' (%s) as default for IPv6 routing and DNS.", connection_id, ip_iface);
} else {
nm_log_info (LOGD_CORE, "Policy set (%s) as default for IPv6 routing and DNS.", ip_iface);
}
out:
policy->default_device6 = best;
}
static void
update_routing_and_dns (NMPolicy *policy, gboolean force_update)
{
update_ip4_routing_and_dns (policy, force_update);
update_ip6_routing_and_dns (policy, force_update);
/* Update the system hostname */
update_system_hostname (policy, policy->default_device4, policy->default_device6);
}
static void
set_connection_auto_retries (NMConnection *connection, guint retries)
{
/* add +1 so that the tag still exists if the # retries is 0 */
g_object_set_data (G_OBJECT (connection), RETRIES_TAG, GUINT_TO_POINTER (retries + 1));
}
static guint32
get_connection_auto_retries (NMConnection *connection)
{
/* subtract 1 to handle the +1 from set_connection_auto_retries() */
return GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (connection), RETRIES_TAG)) - 1;
}
typedef struct {
NMPolicy *policy;
NMDevice *device;
guint id;
} ActivateData;
static void
activate_data_free (ActivateData *data)
{
if (data->id)
g_source_remove (data->id);
g_object_unref (data->device);
memset (data, 0, sizeof (*data));
g_free (data);
}
static gboolean
auto_activate_device (gpointer user_data)
{
ActivateData *data = (ActivateData *) user_data;
NMPolicy *policy;
NMConnection *best_connection;
char *specific_object = NULL;
GSList *connections, *iter;
g_assert (data);
policy = data->policy;
data->id = 0;
policy->pending_activation_checks = g_slist_remove (policy->pending_activation_checks, data);
// FIXME: if a device is already activating (or activated) with a connection
// but another connection now overrides the current one for that device,
// deactivate the device and activate the new connection instead of just
// bailing if the device is already active
if (nm_device_get_act_request (data->device))
goto out;
iter = connections = nm_settings_get_connections (policy->settings);
/* Remove connections that shouldn't be auto-activated */
while (iter) {
NMSettingsConnection *candidate = NM_SETTINGS_CONNECTION (iter->data);
gboolean remove_it = FALSE;
const char *permission;
/* Grab next item before we possibly delete the current item */
iter = g_slist_next (iter);
/* Ignore connections that were tried too many times or are not visible
* to any logged-in users. Also ignore shared wifi connections for
* which no user has the shared wifi permission.
*/
if ( get_connection_auto_retries (NM_CONNECTION (candidate)) == 0
|| nm_settings_connection_is_visible (candidate) == FALSE)
remove_it = TRUE;
else {
permission = nm_utils_get_shared_wifi_permission (NM_CONNECTION (candidate));
if (permission) {
if (nm_settings_connection_check_permission (candidate, permission) == FALSE)
remove_it = TRUE;
}
}
if (remove_it)
connections = g_slist_remove (connections, candidate);
}
best_connection = nm_device_get_best_auto_connection (data->device, connections, &specific_object);
if (best_connection) {
GError *error = NULL;
nm_log_info (LOGD_DEVICE, "Auto-activating connection '%s'.",
nm_connection_get_id (best_connection));
if (!nm_manager_activate_connection (policy->manager,
best_connection,
specific_object,
nm_device_get_path (data->device),
NULL,
&error)) {
nm_log_info (LOGD_DEVICE, "Connection '%s' auto-activation failed: (%d) %s",
nm_connection_get_id (best_connection), error->code, error->message);
g_error_free (error);
}
}
g_slist_free (connections);
out:
activate_data_free (data);
return FALSE;
}
static ActivateData *
activate_data_new (NMPolicy *policy, NMDevice *device, guint delay_seconds)
{
ActivateData *data;
data = g_malloc0 (sizeof (ActivateData));
data->policy = policy;
data->device = g_object_ref (device);
if (delay_seconds > 0)
data->id = g_timeout_add_seconds (delay_seconds, auto_activate_device, data);
else
data->id = g_idle_add (auto_activate_device, data);
return data;
}
static ActivateData *
find_pending_activation (GSList *list, NMDevice *device)
{
GSList *iter;
for (iter = list; iter; iter = g_slist_next (iter)) {
if (((ActivateData *) iter->data)->device == device)
return iter->data;
}
return NULL;
}
/*****************************************************************************/
static void
vpn_connection_activated (NMVPNManager *manager,
NMVPNConnection *vpn,
gpointer user_data)
{
update_routing_and_dns ((NMPolicy *) user_data, TRUE);
}
static void
vpn_connection_deactivated (NMVPNManager *manager,
NMVPNConnection *vpn,
NMVPNConnectionState state,
NMVPNConnectionStateReason reason,
gpointer user_data)
{
update_routing_and_dns ((NMPolicy *) user_data, TRUE);
}
static void
global_state_changed (NMManager *manager, NMState state, gpointer user_data)
{
}
static void
hostname_changed (NMManager *manager, GParamSpec *pspec, gpointer user_data)
{
update_system_hostname ((NMPolicy *) user_data, NULL, NULL);
}
static void
reset_retries_all (NMSettings *settings, NMDevice *device)
{
GSList *connections, *iter;
GError *error = NULL;
connections = nm_settings_get_connections (settings);
for (iter = connections; iter; iter = g_slist_next (iter)) {
if (!device || nm_device_interface_check_connection_compatible (NM_DEVICE_INTERFACE (device), iter->data, &error))
set_connection_auto_retries (NM_CONNECTION (iter->data), RETRIES_DEFAULT);
g_clear_error (&error);
}
g_slist_free (connections);
}
static void
reset_retries_for_failed_secrets (NMSettings *settings)
{
GSList *connections, *iter;
connections = nm_settings_get_connections (settings);
for (iter = connections; iter; iter = g_slist_next (iter)) {
NMDeviceStateReason reason = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (iter->data), FAILURE_REASON_TAG));
if (reason == NM_DEVICE_STATE_REASON_NO_SECRETS) {
set_connection_auto_retries (NM_CONNECTION (iter->data), RETRIES_DEFAULT);
g_object_set_data (G_OBJECT (iter->data), FAILURE_REASON_TAG, GUINT_TO_POINTER (0));
}
}
g_slist_free (connections);
}
static void
sleeping_changed (NMManager *manager, GParamSpec *pspec, gpointer user_data)
{
NMPolicy *policy = user_data;
gboolean sleeping = FALSE, enabled = FALSE;
g_object_get (G_OBJECT (manager), NM_MANAGER_SLEEPING, &sleeping, NULL);
g_object_get (G_OBJECT (manager), NM_MANAGER_NETWORKING_ENABLED, &enabled, NULL);
/* Reset retries on all connections so they'll checked on wakeup */
if (sleeping || !enabled)
reset_retries_all (policy->settings, NULL);
}
static void
schedule_activate_check (NMPolicy *policy, NMDevice *device, guint delay_seconds)
{
ActivateData *data;
NMDeviceState state;
if (nm_manager_get_state (policy->manager) == NM_STATE_ASLEEP)
return;
state = nm_device_interface_get_state (NM_DEVICE_INTERFACE (device));
if (state < NM_DEVICE_STATE_DISCONNECTED)
return;
if (!nm_device_interface_get_enabled (NM_DEVICE_INTERFACE (device)))
return;
if (!nm_device_autoconnect_allowed (device))
return;
/* Schedule an auto-activation if there isn't one already for this device */
if (find_pending_activation (policy->pending_activation_checks, device) == NULL) {
data = activate_data_new (policy, device, delay_seconds);
policy->pending_activation_checks = g_slist_append (policy->pending_activation_checks, data);
}
}
static gboolean
reset_connections_retries (gpointer user_data)
{
NMPolicy *policy = (NMPolicy *) user_data;
GSList *connections, *iter;
time_t con_stamp, min_stamp, now;
policy->reset_retries_id = 0;
min_stamp = now = time (NULL);
connections = nm_settings_get_connections (policy->settings);
for (iter = connections; iter; iter = g_slist_next (iter)) {
con_stamp = GPOINTER_TO_SIZE (g_object_get_data (G_OBJECT (iter->data), RESET_RETRIES_TIMESTAMP_TAG));
if (con_stamp == 0)
continue;
if (con_stamp + RESET_RETRIES_TIMER <= now) {
set_connection_auto_retries (NM_CONNECTION (iter->data), RETRIES_DEFAULT);
g_object_set_data (G_OBJECT (iter->data), RESET_RETRIES_TIMESTAMP_TAG, GSIZE_TO_POINTER (0));
continue;
}
if (con_stamp < min_stamp)
min_stamp = con_stamp;
}
g_slist_free (connections);
/* Schedule the handler again if there are some stamps left */
if (min_stamp != now)
policy->reset_retries_id = g_timeout_add_seconds (RESET_RETRIES_TIMER - (now - min_stamp), reset_connections_retries, policy);
return FALSE;
}
static NMConnection *
get_device_connection (NMDevice *device)
{
NMActRequest *req;
req = nm_device_get_act_request (device);
if (!req)
return NULL;
return nm_act_request_get_connection (req);
}
static void
device_state_changed (NMDevice *device,
NMDeviceState new_state,
NMDeviceState old_state,
NMDeviceStateReason reason,
gpointer user_data)
{
NMPolicy *policy = (NMPolicy *) user_data;
NMConnection *connection = get_device_connection (device);
if (connection)
g_object_set_data (G_OBJECT (connection), FAILURE_REASON_TAG, GUINT_TO_POINTER (0));
switch (new_state) {
case NM_DEVICE_STATE_FAILED:
/* Mark the connection invalid if it failed during activation so that
* it doesn't get automatically chosen over and over and over again.
*/
if (connection && IS_ACTIVATING_STATE (old_state)) {
guint32 tries = get_connection_auto_retries (connection);
if (reason == NM_DEVICE_STATE_REASON_NO_SECRETS) {
/* If the connection couldn't get the secrets it needed (ex because
* the user canceled, or no secrets exist), there's no point in
* automatically retrying because it's just going to fail anyway.
*/
set_connection_auto_retries (connection, 0);
/* Mark the connection as failed due to missing secrets so that we can reset
* RETRIES_TAG and automatically re-try when an secret agent registers.
*/
g_object_set_data (G_OBJECT (connection), FAILURE_REASON_TAG, GUINT_TO_POINTER (NM_DEVICE_STATE_REASON_NO_SECRETS));
} else if (tries > 0) {
/* Otherwise if it's a random failure, just decrease the number
* of automatic retries so that the connection gets tried again
* if it still has a retry count.
*/
set_connection_auto_retries (connection, tries - 1);
}
if (get_connection_auto_retries (connection) == 0) {
nm_log_info (LOGD_DEVICE, "Marking connection '%s' invalid.", nm_connection_get_id (connection));
/* Schedule a handler to reset retries count */
g_object_set_data (G_OBJECT (connection), RESET_RETRIES_TIMESTAMP_TAG, GSIZE_TO_POINTER ((gsize) time (NULL)));
if (!policy->reset_retries_id)
policy->reset_retries_id = g_timeout_add_seconds (RESET_RETRIES_TIMER, reset_connections_retries, policy);
}
nm_connection_clear_secrets (connection);
}
schedule_activate_check (policy, device, 3);
break;
case NM_DEVICE_STATE_ACTIVATED:
if (connection) {
/* Reset auto retries back to default since connection was successful */
set_connection_auto_retries (connection, RETRIES_DEFAULT);
/* And clear secrets so they will always be requested from the
* settings service when the next connection is made.
*/
nm_connection_clear_secrets (connection);
}
update_routing_and_dns (policy, FALSE);
break;
case NM_DEVICE_STATE_UNMANAGED:
case NM_DEVICE_STATE_UNAVAILABLE:
update_routing_and_dns (policy, FALSE);
break;
case NM_DEVICE_STATE_DISCONNECTED:
/* Reset RETRIES_TAG when carrier on. If cable was unplugged
* and plugged again, we should try to reconnect */
if (reason == NM_DEVICE_STATE_REASON_CARRIER && old_state == NM_DEVICE_STATE_UNAVAILABLE)
reset_retries_all (policy->settings, device);
/* Device is now available for auto-activation */
update_routing_and_dns (policy, FALSE);
schedule_activate_check (policy, device, 0);
break;
default:
break;
}
}
static void
device_ip_config_changed (NMDevice *device,
GParamSpec *pspec,
gpointer user_data)
{
update_routing_and_dns ((NMPolicy *) user_data, TRUE);
}
static void
wireless_networks_changed (NMDeviceWifi *device, NMAccessPoint *ap, gpointer user_data)
{
schedule_activate_check ((NMPolicy *) user_data, NM_DEVICE (device), 0);
}
#if WITH_WIMAX
static void
nsps_changed (NMDeviceWimax *device, NMWimaxNsp *nsp, gpointer user_data)
{
schedule_activate_check ((NMPolicy *) user_data, NM_DEVICE (device), 0);
}
#endif
static void
modem_enabled_changed (NMDeviceModem *device, gpointer user_data)
{
schedule_activate_check ((NMPolicy *) (user_data), NM_DEVICE (device), 0);
}
typedef struct {
gulong id;
NMDevice *device;
} DeviceSignalId;
static void
_connect_device_signal (NMPolicy *policy, NMDevice *device, const char *name, gpointer callback)
{
DeviceSignalId *data;
data = g_slice_new0 (DeviceSignalId);
g_assert (data);
data->id = g_signal_connect (device, name, callback, policy);
data->device = device;
policy->dev_ids = g_slist_prepend (policy->dev_ids, data);
}
static void
device_added (NMManager *manager, NMDevice *device, gpointer user_data)
{
NMPolicy *policy = (NMPolicy *) user_data;
_connect_device_signal (policy, device, "state-changed", device_state_changed);
_connect_device_signal (policy, device, "notify::" NM_DEVICE_INTERFACE_IP4_CONFIG, device_ip_config_changed);
_connect_device_signal (policy, device, "notify::" NM_DEVICE_INTERFACE_IP6_CONFIG, device_ip_config_changed);
if (NM_IS_DEVICE_WIFI (device)) {
_connect_device_signal (policy, device, "access-point-added", wireless_networks_changed);
_connect_device_signal (policy, device, "access-point-removed", wireless_networks_changed);
#if WITH_WIMAX
} else if (NM_IS_DEVICE_WIMAX (device)) {
_connect_device_signal (policy, device, "nsp-added", nsps_changed);
_connect_device_signal (policy, device, "nsp-removed", nsps_changed);
#endif
} else if (NM_IS_DEVICE_MODEM (device)) {
_connect_device_signal (policy, device, NM_DEVICE_MODEM_ENABLE_CHANGED, modem_enabled_changed);
}
}
static void
device_removed (NMManager *manager, NMDevice *device, gpointer user_data)
{
NMPolicy *policy = (NMPolicy *) user_data;
ActivateData *tmp;
GSList *iter;
/* Clear any idle callbacks for this device */
tmp = find_pending_activation (policy->pending_activation_checks, device);
if (tmp) {
policy->pending_activation_checks = g_slist_remove (policy->pending_activation_checks, tmp);
activate_data_free (tmp);
}
/* Clear any signal handlers for this device */
iter = policy->dev_ids;
while (iter) {
DeviceSignalId *data = iter->data;
GSList *next = g_slist_next (iter);
if (data->device == device) {
g_signal_handler_disconnect (data->device, data->id);
g_slice_free (DeviceSignalId, data);
policy->dev_ids = g_slist_delete_link (policy->dev_ids, iter);
}
iter = next;
}
update_routing_and_dns (policy, FALSE);
}
static void
schedule_activate_all (NMPolicy *policy)
{
GSList *iter, *devices;
devices = nm_manager_get_devices (policy->manager);
for (iter = devices; iter; iter = g_slist_next (iter))
schedule_activate_check (policy, NM_DEVICE (iter->data), 0);
}
static void
connection_added (NMSettings *settings,
NMConnection *connection,
gpointer user_data)
{
set_connection_auto_retries (connection, RETRIES_DEFAULT);
schedule_activate_all ((NMPolicy *) user_data);
}
static void
connections_loaded (NMSettings *settings, gpointer user_data)
{
// FIXME: "connections-loaded" signal is emmitted *before* we connect to it
// in nm_policy_new(). So this function is never called. Currently we work around
// that by calling reset_retries_all() in nm_policy_new()
/* Initialize connections' auto-retries */
reset_retries_all (settings, NULL);
schedule_activate_all ((NMPolicy *) user_data);
}
static void
connection_updated (NMSettings *settings,
NMConnection *connection,
gpointer user_data)
{
/* Reset auto retries back to default since connection was updated */
set_connection_auto_retries (connection, RETRIES_DEFAULT);
schedule_activate_all ((NMPolicy *) user_data);
}
static void
_deactivate_if_active (NMManager *manager, NMConnection *connection)
{
GPtrArray *list;
int i;
list = nm_manager_get_active_connections_by_connection (manager, connection);
if (!list)
return;
for (i = 0; i < list->len; i++) {
char *path = g_ptr_array_index (list, i);
GError *error = NULL;
if (!nm_manager_deactivate_connection (manager, path, NM_DEVICE_STATE_REASON_CONNECTION_REMOVED, &error)) {
nm_log_warn (LOGD_DEVICE, "Connection '%s' disappeared, but error deactivating it: (%d) %s",
nm_connection_get_id (connection), error->code, error->message);
g_error_free (error);
}
g_free (path);
}
g_ptr_array_free (list, TRUE);
}
static void
connection_removed (NMSettings *settings,
NMConnection *connection,
gpointer user_data)
{
NMPolicy *policy = user_data;
_deactivate_if_active (policy->manager, connection);
}
static void
connection_visibility_changed (NMSettings *settings,
NMSettingsConnection *connection,
gpointer user_data)
{
NMPolicy *policy = user_data;
if (nm_settings_connection_is_visible (connection))
schedule_activate_all (policy);
else
_deactivate_if_active (policy->manager, NM_CONNECTION (connection));
}
static void
secret_agent_registered (NMSettings *settings,
NMSecretAgent *agent,
gpointer user_data)
{
/* The registered secret agent may provide some missing secrets. Thus we
* reset retries count here and schedule activation, so that the
* connections failed due to missing secrets may re-try auto-connection.
*/
reset_retries_for_failed_secrets (settings);
schedule_activate_all ((NMPolicy *) user_data);
}
static void
_connect_manager_signal (NMPolicy *policy, const char *name, gpointer callback)
{
guint id;
id = g_signal_connect (policy->manager, name, callback, policy);
policy->manager_ids = g_slist_prepend (policy->manager_ids, GUINT_TO_POINTER (id));
}
static void
_connect_settings_signal (NMPolicy *policy, const char *name, gpointer callback)
{
guint id;
id = g_signal_connect (policy->settings, name, callback, policy);
policy->settings_ids = g_slist_prepend (policy->settings_ids, GUINT_TO_POINTER (id));
}
NMPolicy *
nm_policy_new (NMManager *manager,
NMVPNManager *vpn_manager,
NMSettings *settings)
{
NMPolicy *policy;
static gboolean initialized = FALSE;
gulong id;
char hostname[HOST_NAME_MAX + 2];
g_return_val_if_fail (NM_IS_MANAGER (manager), NULL);
g_return_val_if_fail (initialized == FALSE, NULL);
policy = g_malloc0 (sizeof (NMPolicy));
policy->manager = g_object_ref (manager);
policy->settings = g_object_ref (settings);
policy->update_state_id = 0;
/* Grab hostname on startup and use that if nothing provides one */
memset (hostname, 0, sizeof (hostname));
if (gethostname (&hostname[0], HOST_NAME_MAX) == 0) {
/* only cache it if it's a valid hostname */
if ( strlen (hostname)
&& strcmp (hostname, "localhost")
&& strcmp (hostname, "localhost.localdomain")
&& strcmp (hostname, "(none)"))
policy->orig_hostname = g_strdup (hostname);
}
policy->vpn_manager = g_object_ref (vpn_manager);
id = g_signal_connect (policy->vpn_manager, "connection-activated",
G_CALLBACK (vpn_connection_activated), policy);
policy->vpn_activated_id = id;
id = g_signal_connect (policy->vpn_manager, "connection-deactivated",
G_CALLBACK (vpn_connection_deactivated), policy);
policy->vpn_deactivated_id = id;
_connect_manager_signal (policy, "state-changed", global_state_changed);
_connect_manager_signal (policy, "notify::" NM_MANAGER_HOSTNAME, hostname_changed);
_connect_manager_signal (policy, "notify::" NM_MANAGER_SLEEPING, sleeping_changed);
_connect_manager_signal (policy, "notify::" NM_MANAGER_NETWORKING_ENABLED, sleeping_changed);
_connect_manager_signal (policy, "device-added", device_added);
_connect_manager_signal (policy, "device-removed", device_removed);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_CONNECTIONS_LOADED, connections_loaded);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_CONNECTION_ADDED, connection_added);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_CONNECTION_UPDATED, connection_updated);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_CONNECTION_REMOVED, connection_removed);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_CONNECTION_VISIBILITY_CHANGED,
connection_visibility_changed);
_connect_settings_signal (policy, NM_SETTINGS_SIGNAL_AGENT_REGISTERED, secret_agent_registered);
/* Initialize connections' auto-retries */
reset_retries_all (policy->settings, NULL);
initialized = TRUE;
return policy;
}
void
nm_policy_destroy (NMPolicy *policy)
{
GSList *iter;
g_return_if_fail (policy != NULL);
/* Tell any existing hostname lookup thread to die, it'll get cleaned up
* by the lookup thread callback.
*/
if (policy->lookup) {
hostname_thread_kill (policy->lookup);
policy->lookup = NULL;
}
g_slist_foreach (policy->pending_activation_checks, (GFunc) activate_data_free, NULL);
g_slist_free (policy->pending_activation_checks);
g_signal_handler_disconnect (policy->vpn_manager, policy->vpn_activated_id);
g_signal_handler_disconnect (policy->vpn_manager, policy->vpn_deactivated_id);
g_object_unref (policy->vpn_manager);
for (iter = policy->manager_ids; iter; iter = g_slist_next (iter))
g_signal_handler_disconnect (policy->manager, GPOINTER_TO_UINT (iter->data));
g_slist_free (policy->manager_ids);
for (iter = policy->settings_ids; iter; iter = g_slist_next (iter))
g_signal_handler_disconnect (policy->settings, GPOINTER_TO_UINT (iter->data));
g_slist_free (policy->settings_ids);
for (iter = policy->dev_ids; iter; iter = g_slist_next (iter)) {
DeviceSignalId *data = iter->data;
g_signal_handler_disconnect (data->device, data->id);
g_slice_free (DeviceSignalId, data);
}
g_slist_free (policy->dev_ids);
if (policy->reset_retries_id)
g_source_remove (policy->reset_retries_id);
g_free (policy->orig_hostname);
g_free (policy->cur_hostname);
g_object_unref (policy->settings);
g_object_unref (policy->manager);
g_free (policy);
}
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