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policy: pass private pointer as signal user-data for device handlers

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We want to unregister the signals at cleanup time via
g_signal_handlers_disconnect_by_data(). This saves us from
storing the signal handler id or by naming the function
explicitly via g_signal_handlers_disconnect_by_func().

However, the registered user-data @self is a public pointer. That
is ugly, because potentially another component could register a
signal with passing the public @self pointer as user-data.
Although that doesn't currently happen, it is more correct to register
with a private pointer to avoid this case altogether.
This commit is contained in:
Thomas Haller 2016-04-04 14:36:34 +02:00
parent b298d3e279
commit 9a9250e53a
1 changed files with 28 additions and 14 deletions
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42
src/nm-policy.c
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@ -59,6 +59,7 @@
typedef struct _NMPolicyPrivate NMPolicyPrivate;
struct _NMPolicyPrivate {
NMPolicy *self;
NMManager *manager;
NMFirewallManager *firewall_manager;
GSList *pending_activation_checks;
@ -1141,8 +1142,8 @@ device_state_changed (NMDevice *device,
NMDeviceStateReason reason,
gpointer user_data)
{
NMPolicy *self = (NMPolicy *) user_data;
NMPolicyPrivate *priv = NM_POLICY_GET_PRIVATE (self);
NMPolicyPrivate *priv = user_data;
NMPolicy *self = priv->self;
NMSettingsConnection *connection = nm_device_get_settings_connection (device);
@ -1287,8 +1288,8 @@ device_ip4_config_changed (NMDevice *device,
NMIP4Config *old_config,
gpointer user_data)
{
NMPolicy *self = user_data;
NMPolicyPrivate *priv = NM_POLICY_GET_PRIVATE (self);
NMPolicyPrivate *priv = user_data;
NMPolicy *self = priv->self;
const char *ip_iface = nm_device_get_ip_iface (device);
nm_dns_manager_begin_updates (priv->dns_manager, __func__);
@ -1321,8 +1322,8 @@ device_ip6_config_changed (NMDevice *device,
NMIP6Config *old_config,
gpointer user_data)
{
NMPolicy *self = user_data;
NMPolicyPrivate *priv = NM_POLICY_GET_PRIVATE (self);
NMPolicyPrivate *priv = user_data;
NMPolicy *self = priv->self;
const char *ip_iface = nm_device_get_ip_iface (device);
nm_dns_manager_begin_updates (priv->dns_manager, __func__);
@ -1354,31 +1355,41 @@ device_autoconnect_changed (NMDevice *device,
GParamSpec *pspec,
gpointer user_data)
{
NMPolicyPrivate *priv = user_data;
NMPolicy *self = priv->self;
if (nm_device_autoconnect_allowed (device))
schedule_activate_check ((NMPolicy *) user_data, device);
schedule_activate_check (self, device);
}
static void
device_recheck_auto_activate (NMDevice *device, gpointer user_data)
{
schedule_activate_check (NM_POLICY (user_data), device);
NMPolicyPrivate *priv = user_data;
NMPolicy *self = priv->self;
schedule_activate_check (self, device);
}
static void
devices_list_unregister (NMPolicy *self, NMDevice *device)
{
g_signal_handlers_disconnect_by_data ((GObject *) device, self);
NMPolicyPrivate *priv = NM_POLICY_GET_PRIVATE (self);
g_signal_handlers_disconnect_by_data ((GObject *) device, priv);
}
static void
devices_list_register (NMPolicy *self, NMDevice *device)
{
NMPolicyPrivate *priv = NM_POLICY_GET_PRIVATE (self);
/* Connect state-changed with _after, so that the handler is invoked after other handlers. */
g_signal_connect_after (device, NM_DEVICE_STATE_CHANGED, (GCallback) device_state_changed, self);
g_signal_connect (device, NM_DEVICE_IP4_CONFIG_CHANGED, (GCallback) device_ip4_config_changed, self);
g_signal_connect (device, NM_DEVICE_IP6_CONFIG_CHANGED, (GCallback) device_ip6_config_changed, self);
g_signal_connect (device, "notify::" NM_DEVICE_AUTOCONNECT, (GCallback) device_autoconnect_changed, self);
g_signal_connect (device, NM_DEVICE_RECHECK_AUTO_ACTIVATE, (GCallback) device_recheck_auto_activate, self);
g_signal_connect_after (device, NM_DEVICE_STATE_CHANGED, (GCallback) device_state_changed, priv);
g_signal_connect (device, NM_DEVICE_IP4_CONFIG_CHANGED, (GCallback) device_ip4_config_changed, priv);
g_signal_connect (device, NM_DEVICE_IP6_CONFIG_CHANGED, (GCallback) device_ip6_config_changed, priv);
g_signal_connect (device, "notify::" NM_DEVICE_AUTOCONNECT, (GCallback) device_autoconnect_changed, priv);
g_signal_connect (device, NM_DEVICE_RECHECK_AUTO_ACTIVATE, (GCallback) device_recheck_auto_activate, priv);
}
static void
@ -1814,6 +1825,7 @@ nm_policy_init (NMPolicy *self)
NMPolicyPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (self, NM_TYPE_POLICY, NMPolicyPrivate);
self->priv = priv;
priv->self = self;
priv->devices = g_hash_table_new (NULL, NULL);
}
@ -1950,6 +1962,8 @@ finalize (GObject *object)
g_hash_table_unref (priv->devices);
G_OBJECT_CLASS (nm_policy_parent_class)->finalize (object);
priv->self = NULL;
}
static void