| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright 2014-2018 Jan-Michael Brummer <jan.brummer@tabos.org> |
| * |
| * SPDX-License-Identifier: LGPL-2.1-or-later |
| * |
| * 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 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, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| #include "config.h" |
| |
| #include <errno.h> |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #include <winsock2.h> |
| #include <ws2tcpip.h> |
| #include <iphlpapi.h> |
| #include <stdio.h> |
| |
| #include "gwin32networkmonitor.h" |
| #include "ginetaddress.h" |
| #include "ginetaddressmask.h" |
| #include "ginitable.h" |
| #include "giomodule-priv.h" |
| #include "glibintl.h" |
| #include "glib/gstdio.h" |
| #include "gnetworkingprivate.h" |
| #include "gsocket.h" |
| #include "gnetworkmonitor.h" |
| #include "gioerror.h" |
| |
| static GInitableIface *initable_parent_iface; |
| static void g_win32_network_monitor_iface_init (GNetworkMonitorInterface *iface); |
| static void g_win32_network_monitor_initable_iface_init (GInitableIface *iface); |
| |
| struct _GWin32NetworkMonitorPrivate |
| { |
| gboolean initialized; |
| GError *init_error; |
| GMainContext *main_context; |
| GSource *route_change_source; |
| HANDLE handle; |
| }; |
| |
| #define g_win32_network_monitor_get_type _g_win32_network_monitor_get_type |
| G_DEFINE_TYPE_WITH_CODE (GWin32NetworkMonitor, g_win32_network_monitor, G_TYPE_NETWORK_MONITOR_BASE, |
| G_ADD_PRIVATE (GWin32NetworkMonitor) |
| G_IMPLEMENT_INTERFACE (G_TYPE_NETWORK_MONITOR, |
| g_win32_network_monitor_iface_init) |
| G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, |
| g_win32_network_monitor_initable_iface_init) |
| _g_io_modules_ensure_extension_points_registered (); |
| g_io_extension_point_implement (G_NETWORK_MONITOR_EXTENSION_POINT_NAME, |
| g_define_type_id, |
| "win32", |
| 20)) |
| |
| static void |
| g_win32_network_monitor_init (GWin32NetworkMonitor *win) |
| { |
| win->priv = g_win32_network_monitor_get_instance_private (win); |
| } |
| |
| static gboolean |
| win_network_monitor_get_ip_info (const IP_ADDRESS_PREFIX *prefix, |
| GSocketFamily *family, |
| const guint8 **dest, |
| gsize *len) |
| { |
| switch (prefix->Prefix.si_family) |
| { |
| case AF_UNSPEC: |
| /* Fall-through: AF_UNSPEC deliveres both IPV4 and IPV6 infos, let`s stick with IPV4 here */ |
| case AF_INET: |
| *family = G_SOCKET_FAMILY_IPV4; |
| *dest = (guint8 *) &(prefix->Prefix.Ipv4.sin_addr); |
| *len = prefix->PrefixLength; |
| break; |
| case AF_INET6: |
| *family = G_SOCKET_FAMILY_IPV6; |
| *dest = (guint8 *) &(prefix->Prefix.Ipv6.sin6_addr); |
| *len = prefix->PrefixLength; |
| break; |
| default: |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static GInetAddressMask * |
| get_network_mask (GSocketFamily family, |
| const guint8 *dest, |
| gsize len) |
| { |
| GInetAddressMask *network; |
| GInetAddress *dest_addr; |
| |
| if (dest != NULL) |
| dest_addr = g_inet_address_new_from_bytes (dest, family); |
| else |
| dest_addr = g_inet_address_new_any (family); |
| |
| network = g_inet_address_mask_new (dest_addr, len, NULL); |
| g_object_unref (dest_addr); |
| |
| return network; |
| } |
| |
| static gboolean |
| win_network_monitor_process_table (GWin32NetworkMonitor *win, |
| GError **error) |
| { |
| DWORD ret = 0; |
| GPtrArray *networks; |
| gsize i; |
| MIB_IPFORWARD_TABLE2 *routes = NULL; |
| MIB_IPFORWARD_ROW2 *route; |
| |
| ret = GetIpForwardTable2 (AF_UNSPEC, &routes); |
| if (ret != ERROR_SUCCESS) |
| { |
| g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, |
| "GetIpForwardTable2 () failed: %ld", ret); |
| |
| return FALSE; |
| } |
| |
| networks = g_ptr_array_new_full (routes->NumEntries, g_object_unref); |
| for (i = 0; i < routes->NumEntries; i++) |
| { |
| GInetAddressMask *network; |
| const guint8 *dest; |
| gsize len; |
| GSocketFamily family; |
| |
| route = routes->Table + i; |
| |
| if (!win_network_monitor_get_ip_info (&route->DestinationPrefix, &family, &dest, &len)) |
| continue; |
| |
| network = get_network_mask (family, dest, len); |
| if (network == NULL) |
| continue; |
| |
| g_ptr_array_add (networks, network); |
| } |
| |
| g_network_monitor_base_set_networks (G_NETWORK_MONITOR_BASE (win), |
| (GInetAddressMask **) networks->pdata, |
| networks->len); |
| |
| return TRUE; |
| } |
| |
| static void |
| add_network (GWin32NetworkMonitor *win, |
| GSocketFamily family, |
| const guint8 *dest, |
| gsize dest_len) |
| { |
| GInetAddressMask *network; |
| |
| network = get_network_mask (family, dest, dest_len); |
| if (network != NULL) |
| { |
| g_network_monitor_base_add_network (G_NETWORK_MONITOR_BASE (win), network); |
| g_object_unref (network); |
| } |
| } |
| |
| static void |
| remove_network (GWin32NetworkMonitor *win, |
| GSocketFamily family, |
| const guint8 *dest, |
| gsize dest_len) |
| { |
| GInetAddressMask *network; |
| |
| network = get_network_mask (family, dest, dest_len); |
| if (network != NULL) |
| { |
| g_network_monitor_base_remove_network (G_NETWORK_MONITOR_BASE (win), network); |
| g_object_unref (network); |
| } |
| } |
| |
| typedef struct { |
| PMIB_IPFORWARD_ROW2 route; |
| MIB_NOTIFICATION_TYPE type; |
| GWin32NetworkMonitor *win; |
| } RouteData; |
| |
| static gboolean |
| win_network_monitor_invoke_route_changed (gpointer user_data) |
| { |
| GSocketFamily family; |
| RouteData *route_data = user_data; |
| const guint8 *dest; |
| gsize len; |
| |
| switch (route_data->type) |
| { |
| case MibDeleteInstance: |
| if (!win_network_monitor_get_ip_info (&route_data->route->DestinationPrefix, &family, &dest, &len)) |
| break; |
| |
| remove_network (route_data->win, family, dest, len); |
| break; |
| case MibAddInstance: |
| if (!win_network_monitor_get_ip_info (&route_data->route->DestinationPrefix, &family, &dest, &len)) |
| break; |
| |
| add_network (route_data->win, family, dest, len); |
| break; |
| case MibInitialNotification: |
| default: |
| break; |
| } |
| |
| return G_SOURCE_REMOVE; |
| } |
| |
| static VOID WINAPI |
| win_network_monitor_route_changed_cb (PVOID context, |
| PMIB_IPFORWARD_ROW2 route, |
| MIB_NOTIFICATION_TYPE type) |
| { |
| GWin32NetworkMonitor *win = context; |
| RouteData *route_data; |
| |
| route_data = g_new0 (RouteData, 1); |
| route_data->route = route; |
| route_data->type = type; |
| route_data->win = win; |
| |
| win->priv->route_change_source = g_idle_source_new (); |
| g_source_set_priority (win->priv->route_change_source, G_PRIORITY_DEFAULT); |
| g_source_set_callback (win->priv->route_change_source, |
| win_network_monitor_invoke_route_changed, |
| route_data, |
| g_free); |
| |
| g_source_attach (win->priv->route_change_source, win->priv->main_context); |
| } |
| |
| static gboolean |
| g_win32_network_monitor_initable_init (GInitable *initable, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GWin32NetworkMonitor *win = G_WIN32_NETWORK_MONITOR (initable); |
| NTSTATUS status; |
| gboolean read; |
| |
| if (!win->priv->initialized) |
| { |
| win->priv->main_context = g_main_context_ref_thread_default (); |
| |
| /* Read current IP routing table. */ |
| read = win_network_monitor_process_table (win, &win->priv->init_error); |
| if (read) |
| { |
| /* Register for IPv4 and IPv6 route updates. */ |
| status = NotifyRouteChange2 (AF_UNSPEC, (PIPFORWARD_CHANGE_CALLBACK) win_network_monitor_route_changed_cb, win, FALSE, &win->priv->handle); |
| if (status != NO_ERROR) |
| g_set_error (&win->priv->init_error, G_IO_ERROR, G_IO_ERROR_FAILED, |
| "NotifyRouteChange2() error: %ld", status); |
| } |
| |
| win->priv->initialized = TRUE; |
| } |
| |
| /* Forward the results. */ |
| if (win->priv->init_error != NULL) |
| { |
| g_propagate_error (error, g_error_copy (win->priv->init_error)); |
| return FALSE; |
| } |
| |
| return initable_parent_iface->init (initable, cancellable, error); |
| } |
| |
| static void |
| g_win32_network_monitor_finalize (GObject *object) |
| { |
| GWin32NetworkMonitor *win = G_WIN32_NETWORK_MONITOR (object); |
| |
| /* Cancel notification event */ |
| if (win->priv->handle) |
| CancelMibChangeNotify2 (win->priv->handle); |
| |
| g_clear_error (&win->priv->init_error); |
| |
| if (win->priv->route_change_source != NULL) |
| { |
| g_source_destroy (win->priv->route_change_source); |
| g_source_unref (win->priv->route_change_source); |
| } |
| |
| g_main_context_unref (win->priv->main_context); |
| |
| G_OBJECT_CLASS (g_win32_network_monitor_parent_class)->finalize (object); |
| } |
| |
| static void |
| g_win32_network_monitor_class_init (GWin32NetworkMonitorClass *win_class) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (win_class); |
| |
| gobject_class->finalize = g_win32_network_monitor_finalize; |
| } |
| |
| static void |
| g_win32_network_monitor_iface_init (GNetworkMonitorInterface *monitor_iface) |
| { |
| } |
| |
| static void |
| g_win32_network_monitor_initable_iface_init (GInitableIface *iface) |
| { |
| initable_parent_iface = g_type_interface_peek_parent (iface); |
| |
| iface->init = g_win32_network_monitor_initable_init; |
| } |