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NetworkManager/src/nm-act-request.c
Lubomir Rintel 8b649a8c84 active-connection: emit a StateChanged signal on state changes 
It includes a reason code that makes it possible for the clients to be
more reasonable about error messages.

The reason code is essentially copied from the VPN, plus three more
reasons that were useful for non-VPN connections.
2017-03-17 10:21:19 +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) 2007 - 2008 Novell, Inc.
*/
#include "nm-default.h"
#include "nm-act-request.h"
#include <string.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>
#include "nm-setting-wireless-security.h"
#include "nm-setting-8021x.h"
#include "devices/nm-device.h"
#include "nm-active-connection.h"
#include "settings/nm-settings-connection.h"
#include "nm-auth-subject.h"
typedef struct {
char *table;
char *rule;
} ShareRule;
typedef struct {
GSList *secrets_calls;
gboolean shared;
GSList *share_rules;
} NMActRequestPrivate;
struct _NMActRequest {
NMActiveConnection parent;
NMActRequestPrivate _priv;
};
typedef struct {
NMActiveConnectionClass parent;
} NMActRequestClass;
enum {
PROP_0,
PROP_IP4_CONFIG,
PROP_DHCP4_CONFIG,
PROP_IP6_CONFIG,
PROP_DHCP6_CONFIG,
LAST_PROP
};
G_DEFINE_TYPE (NMActRequest, nm_act_request, NM_TYPE_ACTIVE_CONNECTION)
#define NM_ACT_REQUEST_GET_PRIVATE(self) _NM_GET_PRIVATE (self, NMActRequest, NM_IS_ACT_REQUEST)
/*****************************************************************************/
NMSettingsConnection *
nm_act_request_get_settings_connection (NMActRequest *req)
{
g_return_val_if_fail (NM_IS_ACT_REQUEST (req), NULL);
return nm_active_connection_get_settings_connection (NM_ACTIVE_CONNECTION (req));
}
NMConnection *
nm_act_request_get_applied_connection (NMActRequest *req)
{
g_return_val_if_fail (NM_IS_ACT_REQUEST (req), NULL);
return nm_active_connection_get_applied_connection (NM_ACTIVE_CONNECTION (req));
}
/*****************************************************************************/
struct _NMActRequestGetSecretsCallId {
NMActRequest *self;
NMActRequestSecretsFunc callback;
gpointer callback_data;
NMSettingsConnectionCallId call_id;
bool has_ref;
};
typedef struct _NMActRequestGetSecretsCallId GetSecretsInfo;
static GetSecretsInfo *
_get_secrets_info_new (NMActRequest *self, gboolean ref_self, NMActRequestSecretsFunc callback, gpointer callback_data)
{
GetSecretsInfo *info;
info = g_slice_new0 (GetSecretsInfo);
info->has_ref = ref_self;
info->self = ref_self ? g_object_ref (self) : self;
info->callback = callback;
info->callback_data = callback_data;
return info;
}
static void
_get_secrets_info_free (GetSecretsInfo *info)
{
if (info->has_ref)
g_object_unref (info->self);
g_slice_free (GetSecretsInfo, info);
}
static void
get_secrets_cb (NMSettingsConnection *connection,
NMSettingsConnectionCallId call_id_s,
const char *agent_username,
const char *setting_name,
GError *error,
gpointer user_data)
{
GetSecretsInfo *info = user_data;
NMActRequestPrivate *priv;
g_return_if_fail (info && info->call_id == call_id_s);
g_return_if_fail (NM_IS_ACT_REQUEST (info->self));
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
return;
priv = NM_ACT_REQUEST_GET_PRIVATE (info->self);
g_return_if_fail (g_slist_find (priv->secrets_calls, info));
priv->secrets_calls = g_slist_remove (priv->secrets_calls, info);
if (info->callback)
info->callback (info->self, info, connection, error, info->callback_data);
_get_secrets_info_free (info);
}
/**
* nm_act_request_get_secrets:
* @self:
* @ref_self: if %TRUE, the pending call take a reference on @self.
* It also allows you to omit the @self argument in nm_act_request_cancel_secrets().
* @setting_name:
* @flags:
* @hint:
* @callback:
* @callback_data:
*
* Asnychronously starts the request for secrets. This function cannot
* fail.
*
* The return call-id can be used to cancel the request. You are
* only allowed to cancel a still pending operation (once).
* The callback will always be invoked once, even for canceling
* or disposing of NMActRequest.
*
* Returns: a call-id.
*/
NMActRequestGetSecretsCallId
nm_act_request_get_secrets (NMActRequest *self,
gboolean ref_self,
const char *setting_name,
NMSecretAgentGetSecretsFlags flags,
const char *hint,
NMActRequestSecretsFunc callback,
gpointer callback_data)
{
NMActRequestPrivate *priv;
GetSecretsInfo *info;
NMSettingsConnectionCallId call_id_s;
NMSettingsConnection *settings_connection;
NMConnection *applied_connection;
const char *hints[2] = { hint, NULL };
g_return_val_if_fail (NM_IS_ACT_REQUEST (self), NULL);
priv = NM_ACT_REQUEST_GET_PRIVATE (self);
settings_connection = nm_act_request_get_settings_connection (self);
applied_connection = nm_act_request_get_applied_connection (self);
info = _get_secrets_info_new (self, ref_self, callback, callback_data);
priv->secrets_calls = g_slist_append (priv->secrets_calls, info);
if (nm_active_connection_get_user_requested (NM_ACTIVE_CONNECTION (self)))
flags |= NM_SECRET_AGENT_GET_SECRETS_FLAG_USER_REQUESTED;
call_id_s = nm_settings_connection_get_secrets (settings_connection,
applied_connection,
nm_active_connection_get_subject (NM_ACTIVE_CONNECTION (self)),
setting_name,
flags,
hints,
get_secrets_cb,
info);
info->call_id = call_id_s;
g_return_val_if_fail (call_id_s, NULL);
return info;
}
static void
_do_cancel_secrets (NMActRequest *self, GetSecretsInfo *info, gboolean is_disposing)
{
NMActRequestPrivate *priv = NM_ACT_REQUEST_GET_PRIVATE (self);
nm_assert (info && info->self == self);
nm_assert (g_slist_find (priv->secrets_calls, info));
priv->secrets_calls = g_slist_remove (priv->secrets_calls, info);
nm_settings_connection_cancel_secrets (nm_act_request_get_settings_connection (self), info->call_id);
if (info->callback) {
gs_free_error GError *error = NULL;
nm_utils_error_set_cancelled (&error, is_disposing, "NMActRequest");
info->callback (self, info, NULL, error, info->callback_data);
}
_get_secrets_info_free (info);
}
/**
* nm_act_request_cancel_secrets:
* @self: The #NMActRequest. Note that this argument can be %NULL if, and only if
* the call_id was created with @take_ref.
* @call_id:
*
* You are only allowed to cancel the call once, and only before the callback
* is already invoked. Note that cancelling causes the callback to be invoked
* synchronously.
*/
void
nm_act_request_cancel_secrets (NMActRequest *self, NMActRequestGetSecretsCallId call_id)
{
NMActRequestPrivate *priv;
g_return_if_fail (call_id);
if (self) {
g_return_if_fail (NM_IS_ACT_REQUEST (self));
g_return_if_fail (self == call_id->self);
} else {
g_return_if_fail (call_id->has_ref);
g_return_if_fail (NM_IS_ACT_REQUEST (call_id->self));
self = call_id->self;
}
priv = NM_ACT_REQUEST_GET_PRIVATE (self);
if (!g_slist_find (priv->secrets_calls, call_id))
g_return_if_reached ();
_do_cancel_secrets (self, call_id, FALSE);
}
void
nm_act_request_clear_secrets (NMActRequest *self)
{
g_return_if_fail (NM_IS_ACT_REQUEST (self));
nm_active_connection_clear_secrets ((NMActiveConnection *) self);
}
/*****************************************************************************/
static void
clear_share_rules (NMActRequest *req)
{
NMActRequestPrivate *priv = NM_ACT_REQUEST_GET_PRIVATE (req);
GSList *iter;
for (iter = priv->share_rules; iter; iter = g_slist_next (iter)) {
ShareRule *rule = (ShareRule *) iter->data;
g_free (rule->table);
g_free (rule->rule);
g_free (rule);
}
g_slist_free (priv->share_rules);
priv->share_rules = NULL;
}
void
nm_act_request_set_shared (NMActRequest *req, gboolean shared)
{
NMActRequestPrivate *priv = NM_ACT_REQUEST_GET_PRIVATE (req);
GSList *list, *iter;
g_return_if_fail (NM_IS_ACT_REQUEST (req));
NM_ACT_REQUEST_GET_PRIVATE (req)->shared = shared;
/* Tear the rules down in reverse order when sharing is stopped */
list = g_slist_copy (priv->share_rules);
if (!shared)
list = g_slist_reverse (list);
/* Send the rules to iptables */
for (iter = list; iter; iter = g_slist_next (iter)) {
ShareRule *rule = (ShareRule *) iter->data;
char *envp[1] = { NULL };
gs_strfreev char **argv = NULL;
gs_free char *cmd = NULL;
cmd = g_strdup_printf ("%s --table %s %s %s",
IPTABLES_PATH,
rule->table,
shared ? "--insert" : "--delete",
rule->rule);
if (!cmd)
continue;
argv = g_strsplit (cmd, " ", 0);
if (argv && argv[0]) {
int status;
GError *error = NULL;
nm_log_info (LOGD_SHARING, "Executing: %s", cmd);
if (!g_spawn_sync ("/", argv, envp, G_SPAWN_STDOUT_TO_DEV_NULL | G_SPAWN_STDERR_TO_DEV_NULL,
NULL, NULL, NULL, NULL, &status, &error)) {
nm_log_warn (LOGD_SHARING, "Error executing command: %s",
error->message);
g_clear_error (&error);
} else if (WEXITSTATUS (status)) {
nm_log_warn (LOGD_SHARING, "** Command returned exit status %d.",
WEXITSTATUS (status));
}
}
}
g_slist_free (list);
/* Clear the share rule list when sharing is stopped */
if (!shared)
clear_share_rules (req);
}
gboolean
nm_act_request_get_shared (NMActRequest *req)
{
g_return_val_if_fail (NM_IS_ACT_REQUEST (req), FALSE);
return NM_ACT_REQUEST_GET_PRIVATE (req)->shared;
}
void
nm_act_request_add_share_rule (NMActRequest *req,
const char *table,
const char *table_rule)
{
NMActRequestPrivate *priv = NM_ACT_REQUEST_GET_PRIVATE (req);
ShareRule *rule;
g_return_if_fail (NM_IS_ACT_REQUEST (req));
g_return_if_fail (table != NULL);
g_return_if_fail (table_rule != NULL);
rule = g_malloc0 (sizeof (ShareRule));
rule->table = g_strdup (table);
rule->rule = g_strdup (table_rule);
priv->share_rules = g_slist_prepend (priv->share_rules, rule);
}
/*****************************************************************************/
static void
device_notify (GObject *object,
GParamSpec *pspec,
gpointer self)
{
g_object_notify (self, pspec->name);
}
static void
device_state_changed (NMActiveConnection *active,
NMDevice *device,
NMDeviceState new_state,
NMDeviceState old_state)
{
NMActiveConnectionState cur_ac_state = nm_active_connection_get_state (active);
NMActiveConnectionState ac_state = NM_ACTIVE_CONNECTION_STATE_UNKNOWN;
NMActiveConnectionStateReason ac_state_reason = NM_ACTIVE_CONNECTION_STATE_REASON_UNKNOWN;
/* Decide which device state changes to handle when this active connection
* is not the device's current request. Two cases here: (a) the AC is
* pending and not yet active, and (b) the AC was active but the device is
* entering DISCONNECTED state (which clears the device's current AC before
* emitting the state change signal).
*/
if (NM_ACTIVE_CONNECTION (nm_device_get_act_request (device)) != active) {
/* Some other request is activating; this one must be pending */
if (new_state >= NM_DEVICE_STATE_PREPARE)
return;
else if (new_state == NM_DEVICE_STATE_DISCONNECTED) {
/* This request hasn't started activating yet; the device is
* disconnecting and cleaning up a previous activation request.
*/
if (cur_ac_state < NM_ACTIVE_CONNECTION_STATE_ACTIVATING)
return;
/* Catch device disconnections after this request has been active */
}
/* All states < DISCONNECTED are fatal and handled */
}
/* Set NMActiveConnection state based on the device's state */
switch (new_state) {
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:
ac_state = NM_ACTIVE_CONNECTION_STATE_ACTIVATING;
break;
case NM_DEVICE_STATE_ACTIVATED:
ac_state = NM_ACTIVE_CONNECTION_STATE_ACTIVATED;
g_signal_connect (device, "notify::" NM_DEVICE_IP4_CONFIG,
G_CALLBACK (device_notify), active);
g_signal_connect (device, "notify::" NM_DEVICE_DHCP4_CONFIG,
G_CALLBACK (device_notify), active);
g_signal_connect (device, "notify::" NM_DEVICE_IP6_CONFIG,
G_CALLBACK (device_notify), active);
g_signal_connect (device, "notify::" NM_DEVICE_DHCP6_CONFIG,
G_CALLBACK (device_notify), active);
break;
case NM_DEVICE_STATE_DEACTIVATING:
ac_state = NM_ACTIVE_CONNECTION_STATE_DEACTIVATING;
break;
case NM_DEVICE_STATE_FAILED:
case NM_DEVICE_STATE_DISCONNECTED:
case NM_DEVICE_STATE_UNMANAGED:
case NM_DEVICE_STATE_UNAVAILABLE:
ac_state = NM_ACTIVE_CONNECTION_STATE_DEACTIVATED;
ac_state_reason = NM_ACTIVE_CONNECTION_STATE_REASON_DEVICE_DISCONNECTED;
g_signal_handlers_disconnect_by_func (device, G_CALLBACK (device_notify), active);
break;
default:
break;
}
if ( ac_state == NM_ACTIVE_CONNECTION_STATE_DEACTIVATED
|| ac_state == NM_ACTIVE_CONNECTION_STATE_UNKNOWN) {
nm_active_connection_set_default (active, FALSE);
nm_active_connection_set_default6 (active, FALSE);
}
nm_active_connection_set_state (active, ac_state, ac_state_reason);
}
static void
master_failed (NMActiveConnection *self)
{
NMDevice *device;
NMDeviceState device_state;
/* If the connection has an active device, fail it */
device = nm_active_connection_get_device (self);
if (device) {
device_state = nm_device_get_state (device);
if (nm_device_is_activating (device) || (device_state == NM_DEVICE_STATE_ACTIVATED)) {
nm_device_queue_state (device,
NM_DEVICE_STATE_FAILED,
NM_DEVICE_STATE_REASON_DEPENDENCY_FAILED);
return;
}
}
/* If no device, or the device wasn't active, just move to deactivated state */
nm_active_connection_set_state (self,
NM_ACTIVE_CONNECTION_STATE_DEACTIVATED,
NM_ACTIVE_CONNECTION_STATE_REASON_DEPENDENCY_FAILED);
}
/*****************************************************************************/
static void
get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
NMActiveConnection *active;
NMDevice *device;
char *name;
switch (prop_id) {
case PROP_IP4_CONFIG:
name = NM_DEVICE_IP4_CONFIG;
break;
case PROP_DHCP4_CONFIG:
name = NM_DEVICE_DHCP4_CONFIG;
break;
case PROP_IP6_CONFIG:
name = NM_DEVICE_IP6_CONFIG;
break;
case PROP_DHCP6_CONFIG:
name = NM_DEVICE_DHCP6_CONFIG;
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
return;
}
active = NM_ACTIVE_CONNECTION (object);
device = nm_active_connection_get_device (active);
if ( !device
|| !NM_IN_SET (nm_active_connection_get_state (active),
NM_ACTIVE_CONNECTION_STATE_ACTIVATED,
NM_ACTIVE_CONNECTION_STATE_DEACTIVATING)) {
g_value_set_string (value, "/");
return;
}
g_object_get_property (G_OBJECT (device), name, value);
}
static void
nm_act_request_init (NMActRequest *req)
{
}
/**
* nm_act_request_new:
*
* @settings_connection: (allow-none): the connection to activate @device with
* @applied_connection: (allow-none): the applied connection
* @specific_object: the object path of the specific object (ie, WiFi access point,
* etc) that will be used to activate @connection and @device
* @subject: the #NMAuthSubject representing the requestor of the activation
* @activation_type: the #NMActivationType.
* @device: the device/interface to configure according to @connection
*
* Creates a new device-based activation request. If an applied connection is
* supplied, it shall not be modified by the caller afterwards.
*
* Returns: the new activation request on success, %NULL on error.
*/
NMActRequest *
nm_act_request_new (NMSettingsConnection *settings_connection,
NMConnection *applied_connection,
const char *specific_object,
NMAuthSubject *subject,
NMActivationType activation_type,
NMDevice *device)
{
g_return_val_if_fail (!settings_connection || NM_IS_SETTINGS_CONNECTION (settings_connection), NULL);
g_return_val_if_fail (NM_IS_DEVICE (device), NULL);
g_return_val_if_fail (NM_IS_AUTH_SUBJECT (subject), NULL);
return (NMActRequest *) g_object_new (NM_TYPE_ACT_REQUEST,
NM_ACTIVE_CONNECTION_INT_APPLIED_CONNECTION, applied_connection,
NM_ACTIVE_CONNECTION_INT_SETTINGS_CONNECTION, settings_connection,
NM_ACTIVE_CONNECTION_INT_DEVICE, device,
NM_ACTIVE_CONNECTION_SPECIFIC_OBJECT, specific_object,
NM_ACTIVE_CONNECTION_INT_SUBJECT, subject,
NM_ACTIVE_CONNECTION_INT_ACTIVATION_TYPE, (int) activation_type,
NULL);
}
static void
dispose (GObject *object)
{
NMActRequest *self = NM_ACT_REQUEST (object);
NMActRequestPrivate *priv = NM_ACT_REQUEST_GET_PRIVATE (self);
/* Kill any in-progress secrets requests */
while (priv->secrets_calls)
_do_cancel_secrets (self, priv->secrets_calls->data, TRUE);
/* Clear any share rules */
if (priv->share_rules) {
nm_act_request_set_shared (NM_ACT_REQUEST (object), FALSE);
clear_share_rules (NM_ACT_REQUEST (object));
}
G_OBJECT_CLASS (nm_act_request_parent_class)->dispose (object);
}
static void
nm_act_request_class_init (NMActRequestClass *req_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (req_class);
NMActiveConnectionClass *active_class = NM_ACTIVE_CONNECTION_CLASS (req_class);
/* virtual methods */
object_class->dispose = dispose;
object_class->get_property = get_property;
active_class->master_failed = master_failed;
active_class->device_state_changed = device_state_changed;
/* properties */
g_object_class_override_property (object_class, PROP_IP4_CONFIG,
NM_ACTIVE_CONNECTION_IP4_CONFIG);
g_object_class_override_property (object_class, PROP_DHCP4_CONFIG,
NM_ACTIVE_CONNECTION_DHCP4_CONFIG);
g_object_class_override_property (object_class, PROP_IP6_CONFIG,
NM_ACTIVE_CONNECTION_IP6_CONFIG);
g_object_class_override_property (object_class, PROP_DHCP6_CONFIG,
NM_ACTIVE_CONNECTION_DHCP6_CONFIG);
}
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