| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright 2011 Red Hat, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General |
| * Public License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "config.h" |
| |
| #include "gnetworkmonitorbase.h" |
| #include "ginetaddress.h" |
| #include "ginetaddressmask.h" |
| #include "ginetsocketaddress.h" |
| #include "ginitable.h" |
| #include "gioerror.h" |
| #include "giomodule-priv.h" |
| #include "gnetworkmonitor.h" |
| #include "gsocketaddressenumerator.h" |
| #include "gsocketconnectable.h" |
| #include "gtask.h" |
| #include "glibintl.h" |
| |
| static void g_network_monitor_base_iface_init (GNetworkMonitorInterface *iface); |
| static void g_network_monitor_base_initable_iface_init (GInitableIface *iface); |
| |
| enum |
| { |
| PROP_0, |
| |
| PROP_NETWORK_AVAILABLE, |
| PROP_NETWORK_METERED, |
| PROP_CONNECTIVITY |
| }; |
| |
| struct _GNetworkMonitorBasePrivate |
| { |
| GHashTable *networks /* (element-type GInetAddressMask) (owned) */; |
| gboolean have_ipv4_default_route; |
| gboolean have_ipv6_default_route; |
| gboolean is_available; |
| |
| GMainContext *context; |
| GSource *network_changed_source; |
| gboolean initializing; |
| }; |
| |
| static guint network_changed_signal = 0; |
| |
| static void queue_network_changed (GNetworkMonitorBase *monitor); |
| static guint inet_address_mask_hash (gconstpointer key); |
| static gboolean inet_address_mask_equal (gconstpointer a, |
| gconstpointer b); |
| |
| G_DEFINE_TYPE_WITH_CODE (GNetworkMonitorBase, g_network_monitor_base, G_TYPE_OBJECT, |
| G_ADD_PRIVATE (GNetworkMonitorBase) |
| G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, |
| g_network_monitor_base_initable_iface_init) |
| G_IMPLEMENT_INTERFACE (G_TYPE_NETWORK_MONITOR, |
| g_network_monitor_base_iface_init) |
| _g_io_modules_ensure_extension_points_registered (); |
| g_io_extension_point_implement (G_NETWORK_MONITOR_EXTENSION_POINT_NAME, |
| g_define_type_id, |
| "base", |
| 0)) |
| |
| static void |
| g_network_monitor_base_init (GNetworkMonitorBase *monitor) |
| { |
| monitor->priv = g_network_monitor_base_get_instance_private (monitor); |
| monitor->priv->networks = g_hash_table_new_full (inet_address_mask_hash, |
| inet_address_mask_equal, |
| g_object_unref, NULL); |
| monitor->priv->context = g_main_context_get_thread_default (); |
| if (monitor->priv->context) |
| g_main_context_ref (monitor->priv->context); |
| |
| monitor->priv->initializing = TRUE; |
| } |
| |
| static void |
| g_network_monitor_base_constructed (GObject *object) |
| { |
| GNetworkMonitorBase *monitor = G_NETWORK_MONITOR_BASE (object); |
| |
| if (G_OBJECT_TYPE (monitor) == G_TYPE_NETWORK_MONITOR_BASE) |
| { |
| GInetAddressMask *mask; |
| |
| /* We're the dumb base class, not a smarter subclass. So just |
| * assume that the network is available. |
| */ |
| mask = g_inet_address_mask_new_from_string ("0.0.0.0/0", NULL); |
| g_network_monitor_base_add_network (monitor, mask); |
| g_object_unref (mask); |
| |
| mask = g_inet_address_mask_new_from_string ("::/0", NULL); |
| if (mask) |
| { |
| /* On some environments (for example Windows without IPv6 support |
| * enabled) the string "::/0" can't be processed and causes |
| * g_inet_address_mask_new_from_string to return NULL */ |
| g_network_monitor_base_add_network (monitor, mask); |
| g_object_unref (mask); |
| } |
| } |
| } |
| |
| static void |
| g_network_monitor_base_get_property (GObject *object, |
| guint prop_id, |
| GValue *value, |
| GParamSpec *pspec) |
| { |
| GNetworkMonitorBase *monitor = G_NETWORK_MONITOR_BASE (object); |
| |
| switch (prop_id) |
| { |
| case PROP_NETWORK_AVAILABLE: |
| g_value_set_boolean (value, monitor->priv->is_available); |
| break; |
| |
| case PROP_NETWORK_METERED: |
| /* Default to FALSE in the unknown case. */ |
| g_value_set_boolean (value, FALSE); |
| break; |
| |
| case PROP_CONNECTIVITY: |
| g_value_set_enum (value, |
| monitor->priv->is_available ? |
| G_NETWORK_CONNECTIVITY_FULL : |
| G_NETWORK_CONNECTIVITY_LOCAL); |
| break; |
| |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| |
| } |
| |
| static void |
| g_network_monitor_base_finalize (GObject *object) |
| { |
| GNetworkMonitorBase *monitor = G_NETWORK_MONITOR_BASE (object); |
| |
| g_hash_table_unref (monitor->priv->networks); |
| if (monitor->priv->network_changed_source) |
| { |
| g_source_destroy (monitor->priv->network_changed_source); |
| g_source_unref (monitor->priv->network_changed_source); |
| } |
| if (monitor->priv->context) |
| g_main_context_unref (monitor->priv->context); |
| |
| G_OBJECT_CLASS (g_network_monitor_base_parent_class)->finalize (object); |
| } |
| |
| static void |
| g_network_monitor_base_class_init (GNetworkMonitorBaseClass *monitor_class) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (monitor_class); |
| |
| gobject_class->constructed = g_network_monitor_base_constructed; |
| gobject_class->get_property = g_network_monitor_base_get_property; |
| gobject_class->finalize = g_network_monitor_base_finalize; |
| |
| g_object_class_override_property (gobject_class, PROP_NETWORK_AVAILABLE, "network-available"); |
| g_object_class_override_property (gobject_class, PROP_NETWORK_METERED, "network-metered"); |
| g_object_class_override_property (gobject_class, PROP_CONNECTIVITY, "connectivity"); |
| } |
| |
| static gboolean |
| g_network_monitor_base_can_reach_sockaddr (GNetworkMonitorBase *base, |
| GSocketAddress *sockaddr) |
| { |
| GInetAddress *iaddr; |
| GHashTableIter iter; |
| gpointer key; |
| |
| if (!G_IS_INET_SOCKET_ADDRESS (sockaddr)) |
| return FALSE; |
| |
| iaddr = g_inet_socket_address_get_address (G_INET_SOCKET_ADDRESS (sockaddr)); |
| g_hash_table_iter_init (&iter, base->priv->networks); |
| while (g_hash_table_iter_next (&iter, &key, NULL)) |
| { |
| GInetAddressMask *mask = key; |
| if (g_inet_address_mask_matches (mask, iaddr)) |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| static gboolean |
| g_network_monitor_base_can_reach (GNetworkMonitor *monitor, |
| GSocketConnectable *connectable, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GNetworkMonitorBase *base = G_NETWORK_MONITOR_BASE (monitor); |
| GSocketAddressEnumerator *enumerator; |
| GSocketAddress *addr; |
| |
| if (g_hash_table_size (base->priv->networks) == 0) |
| { |
| g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NETWORK_UNREACHABLE, |
| _("Network unreachable")); |
| return FALSE; |
| } |
| |
| enumerator = g_socket_connectable_proxy_enumerate (connectable); |
| addr = g_socket_address_enumerator_next (enumerator, cancellable, error); |
| if (!addr) |
| { |
| /* Either the user cancelled, or DNS resolution failed */ |
| g_object_unref (enumerator); |
| return FALSE; |
| } |
| |
| if (base->priv->have_ipv4_default_route && |
| base->priv->have_ipv6_default_route) |
| { |
| g_object_unref (enumerator); |
| g_object_unref (addr); |
| return TRUE; |
| } |
| |
| while (addr) |
| { |
| if (g_network_monitor_base_can_reach_sockaddr (base, addr)) |
| { |
| g_object_unref (addr); |
| g_object_unref (enumerator); |
| return TRUE; |
| } |
| |
| g_object_unref (addr); |
| addr = g_socket_address_enumerator_next (enumerator, cancellable, error); |
| } |
| g_object_unref (enumerator); |
| |
| if (error && !*error) |
| { |
| g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE, |
| _("Host unreachable")); |
| } |
| return FALSE; |
| } |
| |
| static void |
| can_reach_async_got_address (GObject *object, |
| GAsyncResult *result, |
| gpointer user_data) |
| { |
| GSocketAddressEnumerator *enumerator = G_SOCKET_ADDRESS_ENUMERATOR (object); |
| GTask *task = user_data; |
| GNetworkMonitorBase *base = g_task_get_source_object (task); |
| GSocketAddress *addr; |
| GError *error = NULL; |
| |
| addr = g_socket_address_enumerator_next_finish (enumerator, result, &error); |
| if (!addr) |
| { |
| if (error) |
| { |
| /* Either the user cancelled, or DNS resolution failed */ |
| g_task_return_error (task, error); |
| g_object_unref (task); |
| return; |
| } |
| else |
| { |
| /* Resolved all addresses, none matched */ |
| g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE, |
| _("Host unreachable")); |
| g_object_unref (task); |
| return; |
| } |
| } |
| |
| if (g_network_monitor_base_can_reach_sockaddr (base, addr)) |
| { |
| g_object_unref (addr); |
| g_task_return_boolean (task, TRUE); |
| g_object_unref (task); |
| return; |
| } |
| g_object_unref (addr); |
| |
| g_socket_address_enumerator_next_async (enumerator, |
| g_task_get_cancellable (task), |
| can_reach_async_got_address, task); |
| } |
| |
| static void |
| g_network_monitor_base_can_reach_async (GNetworkMonitor *monitor, |
| GSocketConnectable *connectable, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GTask *task; |
| GSocketAddressEnumerator *enumerator; |
| |
| task = g_task_new (monitor, cancellable, callback, user_data); |
| g_task_set_source_tag (task, g_network_monitor_base_can_reach_async); |
| |
| if (g_hash_table_size (G_NETWORK_MONITOR_BASE (monitor)->priv->networks) == 0) |
| { |
| g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NETWORK_UNREACHABLE, |
| _("Network unreachable")); |
| g_object_unref (task); |
| return; |
| } |
| |
| enumerator = g_socket_connectable_proxy_enumerate (connectable); |
| g_socket_address_enumerator_next_async (enumerator, cancellable, |
| can_reach_async_got_address, task); |
| g_object_unref (enumerator); |
| } |
| |
| static gboolean |
| g_network_monitor_base_can_reach_finish (GNetworkMonitor *monitor, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (g_task_is_valid (result, monitor), FALSE); |
| |
| return g_task_propagate_boolean (G_TASK (result), error); |
| } |
| |
| static void |
| g_network_monitor_base_iface_init (GNetworkMonitorInterface *monitor_iface) |
| { |
| monitor_iface->can_reach = g_network_monitor_base_can_reach; |
| monitor_iface->can_reach_async = g_network_monitor_base_can_reach_async; |
| monitor_iface->can_reach_finish = g_network_monitor_base_can_reach_finish; |
| |
| network_changed_signal = g_signal_lookup ("network-changed", G_TYPE_NETWORK_MONITOR); |
| } |
| |
| static gboolean |
| g_network_monitor_base_initable_init (GInitable *initable, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GNetworkMonitorBase *base = G_NETWORK_MONITOR_BASE (initable); |
| |
| base->priv->initializing = FALSE; |
| |
| return TRUE; |
| } |
| |
| static void |
| g_network_monitor_base_initable_iface_init (GInitableIface *iface) |
| { |
| iface->init = g_network_monitor_base_initable_init; |
| } |
| |
| static guint |
| inet_address_mask_hash (gconstpointer key) |
| { |
| GInetAddressMask *mask = G_INET_ADDRESS_MASK (key); |
| guint addr_hash; |
| guint mask_length = g_inet_address_mask_get_length (mask); |
| GInetAddress *addr = g_inet_address_mask_get_address (mask); |
| const guint8 *bytes = g_inet_address_to_bytes (addr); |
| gsize bytes_length = g_inet_address_get_native_size (addr); |
| |
| union |
| { |
| const guint8 *bytes; |
| guint32 *hash32; |
| guint64 *hash64; |
| } integerifier; |
| |
| /* If we can fit the entire address into the hash key, do it. Don’t worry |
| * about endianness; the address should always be in network endianness. */ |
| if (bytes_length == sizeof (guint32)) |
| { |
| integerifier.bytes = bytes; |
| addr_hash = *integerifier.hash32; |
| } |
| else if (bytes_length == sizeof (guint64)) |
| { |
| integerifier.bytes = bytes; |
| addr_hash = *integerifier.hash64; |
| } |
| else |
| { |
| gsize i; |
| |
| /* Otherwise, fall back to adding the bytes together. We do this, rather |
| * than XORing them, as routes often have repeated tuples which would |
| * cancel out under XOR. */ |
| addr_hash = 0; |
| for (i = 0; i < bytes_length; i++) |
| addr_hash += bytes[i]; |
| } |
| |
| return addr_hash + mask_length;; |
| } |
| |
| static gboolean |
| inet_address_mask_equal (gconstpointer a, |
| gconstpointer b) |
| { |
| GInetAddressMask *mask_a = G_INET_ADDRESS_MASK (a); |
| GInetAddressMask *mask_b = G_INET_ADDRESS_MASK (b); |
| |
| return g_inet_address_mask_equal (mask_a, mask_b); |
| } |
| |
| static gboolean |
| emit_network_changed (gpointer user_data) |
| { |
| GNetworkMonitorBase *monitor = user_data; |
| gboolean is_available; |
| |
| if (g_source_is_destroyed (g_main_current_source ())) |
| return FALSE; |
| |
| g_object_ref (monitor); |
| |
| is_available = (monitor->priv->have_ipv4_default_route || |
| monitor->priv->have_ipv6_default_route); |
| if (monitor->priv->is_available != is_available) |
| { |
| monitor->priv->is_available = is_available; |
| g_object_notify (G_OBJECT (monitor), "network-available"); |
| } |
| |
| g_signal_emit (monitor, network_changed_signal, 0, is_available); |
| |
| g_source_unref (monitor->priv->network_changed_source); |
| monitor->priv->network_changed_source = NULL; |
| |
| g_object_unref (monitor); |
| return FALSE; |
| } |
| |
| static void |
| queue_network_changed (GNetworkMonitorBase *monitor) |
| { |
| if (!monitor->priv->network_changed_source && |
| !monitor->priv->initializing) |
| { |
| GSource *source; |
| |
| source = g_idle_source_new (); |
| /* Use G_PRIORITY_HIGH_IDLE priority so that multiple |
| * network-change-related notifications coming in at |
| * G_PRIORITY_DEFAULT will get coalesced into one signal |
| * emission. |
| */ |
| g_source_set_priority (source, G_PRIORITY_HIGH_IDLE); |
| g_source_set_callback (source, emit_network_changed, monitor, NULL); |
| g_source_set_name (source, "[gio] emit_network_changed"); |
| g_source_attach (source, monitor->priv->context); |
| monitor->priv->network_changed_source = source; |
| } |
| |
| /* Normally we wait to update is_available until we emit the signal, |
| * to keep things consistent. But when we're first creating the |
| * object, we want it to be correct right away. |
| */ |
| if (monitor->priv->initializing) |
| { |
| monitor->priv->is_available = (monitor->priv->have_ipv4_default_route || |
| monitor->priv->have_ipv6_default_route); |
| } |
| } |
| |
| /** |
| * g_network_monitor_base_add_network: |
| * @monitor: the #GNetworkMonitorBase |
| * @network: (transfer none): a #GInetAddressMask |
| * |
| * Adds @network to @monitor's list of available networks. |
| * |
| * Since: 2.32 |
| */ |
| void |
| g_network_monitor_base_add_network (GNetworkMonitorBase *monitor, |
| GInetAddressMask *network) |
| { |
| if (!g_hash_table_add (monitor->priv->networks, g_object_ref (network))) |
| return; |
| |
| if (g_inet_address_mask_get_length (network) == 0) |
| { |
| switch (g_inet_address_mask_get_family (network)) |
| { |
| case G_SOCKET_FAMILY_IPV4: |
| monitor->priv->have_ipv4_default_route = TRUE; |
| break; |
| case G_SOCKET_FAMILY_IPV6: |
| monitor->priv->have_ipv6_default_route = TRUE; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* Don't emit network-changed when multicast-link-local routing |
| * changes. This rather arbitrary decision is mostly because it |
| * seems to change quite often... |
| */ |
| if (g_inet_address_get_is_mc_link_local (g_inet_address_mask_get_address (network))) |
| return; |
| |
| queue_network_changed (monitor); |
| } |
| |
| /** |
| * g_network_monitor_base_remove_network: |
| * @monitor: the #GNetworkMonitorBase |
| * @network: a #GInetAddressMask |
| * |
| * Removes @network from @monitor's list of available networks. |
| * |
| * Since: 2.32 |
| */ |
| void |
| g_network_monitor_base_remove_network (GNetworkMonitorBase *monitor, |
| GInetAddressMask *network) |
| { |
| if (!g_hash_table_remove (monitor->priv->networks, network)) |
| return; |
| |
| if (g_inet_address_mask_get_length (network) == 0) |
| { |
| switch (g_inet_address_mask_get_family (network)) |
| { |
| case G_SOCKET_FAMILY_IPV4: |
| monitor->priv->have_ipv4_default_route = FALSE; |
| break; |
| case G_SOCKET_FAMILY_IPV6: |
| monitor->priv->have_ipv6_default_route = FALSE; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| queue_network_changed (monitor); |
| } |
| |
| /** |
| * g_network_monitor_base_set_networks: |
| * @monitor: the #GNetworkMonitorBase |
| * @networks: (array length=length): an array of #GInetAddressMask |
| * @length: length of @networks |
| * |
| * Drops @monitor's current list of available networks and replaces |
| * it with @networks. |
| */ |
| void |
| g_network_monitor_base_set_networks (GNetworkMonitorBase *monitor, |
| GInetAddressMask **networks, |
| gint length) |
| { |
| int i; |
| |
| g_hash_table_remove_all (monitor->priv->networks); |
| monitor->priv->have_ipv4_default_route = FALSE; |
| monitor->priv->have_ipv6_default_route = FALSE; |
| |
| for (i = 0; i < length; i++) |
| g_network_monitor_base_add_network (monitor, networks[i]); |
| } |
