Imported Upstream version 2.2.1upstream/2.2.1

1 files changed, 277 insertions, 0 deletions

diff --git a/win32.h b/win32.h
new file mode 100644
index 0000000..b6a162e
--- /dev/null
+++ b/win32.h
@@ -0,0 +1,277 @@
+/*
+ *  OpenVPN -- An application to securely tunnel IP networks
+ *             over a single UDP port, with support for SSL/TLS-based
+ *             session authentication and key exchange,
+ *             packet encryption, packet authentication, and
+ *             packet compression.
+ *
+ *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2
+ *  as published by the Free Software Foundation.
+ *
+ *  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 (see the file COPYING included with this
+ *  distribution); if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifdef WIN32
+#ifndef OPENVPN_WIN32_H
+#define OPENVPN_WIN32_H
+
+#include "mtu.h"
+
+/* location of executables */
+#define SYS_PATH_ENV_VAR_NAME "SystemRoot"  /* environmental variable name that normally contains the system path */
+#define DEFAULT_WIN_SYS_PATH  "C:\\WINDOWS" /* --win-sys default value */
+#define NETSH_PATH_SUFFIX     "\\system32\\netsh.exe"
+#define WIN_ROUTE_PATH_SUFFIX "\\system32\\route.exe"
+#define WIN_IPCONFIG_PATH_SUFFIX "\\system32\\ipconfig.exe"
+#define WIN_NET_PATH_SUFFIX "\\system32\\net.exe"
+
+/*
+ * Win32-specific OpenVPN code, targetted at the mingw
+ * development environment.
+ */
+
+void init_win32 (void);
+void uninit_win32 (void);
+
+void set_pause_exit_win32 (void);
+
+/*
+ * Use keyboard input or events
+ * to simulate incoming signals
+ */
+
+#define SIGUSR1   1
+#define SIGUSR2   2
+#define SIGHUP    3
+#define SIGTERM   4
+#define SIGINT    5
+
+struct security_attributes
+{
+  SECURITY_ATTRIBUTES sa;
+  SECURITY_DESCRIPTOR sd;
+};
+
+#define HANDLE_DEFINED(h) ((h) != NULL && (h) != INVALID_HANDLE_VALUE)
+
+/*
+ * Save old window title.
+ */
+struct window_title
+{
+  bool saved;
+  char old_window_title [256];
+};
+
+struct rw_handle {
+  HANDLE read;
+  HANDLE write;
+};
+
+/*
+ * Event-based notification of incoming TCP connections
+ */
+
+#define NE32_PERSIST_EVENT (1<<0)
+#define NE32_WRITE_EVENT   (1<<1)
+
+static inline bool
+defined_net_event_win32 (const struct rw_handle *event)
+{
+  return event->read != NULL;
+}
+
+void init_net_event_win32 (struct rw_handle *event, long network_events, socket_descriptor_t sd, unsigned int flags);
+long reset_net_event_win32 (struct rw_handle *event, socket_descriptor_t sd);
+void close_net_event_win32 (struct rw_handle *event, socket_descriptor_t sd, unsigned int flags);
+
+/*
+ * A stateful variant of the net_event_win32 functions above
+ */
+
+struct net_event_win32
+{
+  struct rw_handle handle;
+  socket_descriptor_t sd;
+  long event_mask;
+};
+
+void net_event_win32_init (struct net_event_win32 *ne);
+void net_event_win32_start (struct net_event_win32 *ne, long network_events, socket_descriptor_t sd);
+void net_event_win32_reset (struct net_event_win32 *ne);
+void net_event_win32_reset_write (struct net_event_win32 *ne);
+void net_event_win32_stop (struct net_event_win32 *ne);
+void net_event_win32_close (struct net_event_win32 *ne);
+
+static inline bool
+net_event_win32_defined (const struct net_event_win32 *ne)
+{
+  return defined_net_event_win32 (&ne->handle);
+}
+
+static inline struct rw_handle *
+net_event_win32_get_event (struct net_event_win32 *ne)
+{
+  return &ne->handle;
+}
+
+static inline long
+net_event_win32_get_event_mask (const struct net_event_win32 *ne)
+{
+  return ne->event_mask;
+}
+
+static inline void
+net_event_win32_clear_selected_events (struct net_event_win32 *ne, long selected_events)
+{
+  ne->event_mask &= ~selected_events;
+}
+
+/*
+ * Signal handling
+ */
+struct win32_signal {
+# define WSO_MODE_UNDEF   0
+# define WSO_MODE_SERVICE 1
+# define WSO_MODE_CONSOLE 2
+  int mode;
+  struct rw_handle in;
+  DWORD console_mode_save;
+  bool console_mode_save_defined;
+};
+
+extern struct win32_signal win32_signal; /* static/global */
+extern struct window_title window_title; /* static/global */
+
+void win32_signal_clear (struct win32_signal *ws);
+
+/* win32_signal_open startup type */
+#define WSO_NOFORCE       0
+#define WSO_FORCE_SERVICE 1
+#define WSO_FORCE_CONSOLE 2
+
+void win32_signal_open (struct win32_signal *ws,
+			int force, /* set to WSO force parm */
+			const char *exit_event_name,
+			bool exit_event_initial_state);
+
+void win32_signal_close (struct win32_signal *ws);
+
+int win32_signal_get (struct win32_signal *ws);
+
+void win32_pause (struct win32_signal *ws);
+
+/*
+ * Set the text on the window title bar
+ */
+
+void window_title_clear (struct window_title *wt);
+void window_title_save (struct window_title *wt);
+void window_title_restore (const struct window_title *wt);
+void window_title_generate (const char *title);
+
+/* 
+ * We try to do all Win32 I/O using overlapped
+ * (i.e. asynchronous) I/O for a performance win.
+ */
+struct overlapped_io {
+# define IOSTATE_INITIAL          0
+# define IOSTATE_QUEUED           1 /* overlapped I/O has been queued */
+# define IOSTATE_IMMEDIATE_RETURN 2 /* I/O function returned immediately without queueing */
+  int iostate;
+  OVERLAPPED overlapped;
+  DWORD size;
+  DWORD flags;
+  int status;
+  bool addr_defined;
+  struct sockaddr_in addr;
+  int addrlen;
+  struct buffer buf_init;
+  struct buffer buf;
+};
+
+void overlapped_io_init (struct overlapped_io *o,
+			 const struct frame *frame,
+			 BOOL event_state,
+			 bool tuntap_buffer);
+
+void overlapped_io_close (struct overlapped_io *o);
+
+static inline bool
+overlapped_io_active (struct overlapped_io *o)
+{
+  return o->iostate == IOSTATE_QUEUED || o->iostate == IOSTATE_IMMEDIATE_RETURN;
+}
+
+char *overlapped_io_state_ascii (const struct overlapped_io *o);
+
+/*
+ * Use to control access to resources that only one
+ * OpenVPN process on a given machine can access at
+ * a given time.
+ */
+
+struct semaphore
+{
+  const char *name;
+  bool locked;
+  HANDLE hand;
+};
+
+void semaphore_clear (struct semaphore *s);
+void semaphore_open (struct semaphore *s, const char *name);
+bool semaphore_lock (struct semaphore *s, int timeout_milliseconds);
+void semaphore_release (struct semaphore *s);
+void semaphore_close (struct semaphore *s);
+
+/*
+ * Special global semaphore used to protect network
+ * shell commands from simultaneous instantiation.
+ *
+ * It seems you can't run more than one instance
+ * of netsh on the same machine at the same time.
+ */
+
+extern struct semaphore netcmd_semaphore;
+void netcmd_semaphore_init (void);
+void netcmd_semaphore_close (void);
+void netcmd_semaphore_lock (void);
+void netcmd_semaphore_release (void);
+
+bool get_console_input_win32 (const char *prompt, const bool echo, char *input, const int capacity);
+char *getpass (const char *prompt);
+
+/* Set Win32 security attributes structure to allow all access */
+bool init_security_attributes_allow_all (struct security_attributes *obj);
+
+/* return true if filename is safe to be used on Windows */
+bool win_safe_filename (const char *fn);
+
+/* add constant environmental variables needed by Windows */
+struct env_set;
+void env_set_add_win32 (struct env_set *es);
+
+/* get and set the current windows system path */
+void set_win_sys_path (const char *newpath, struct env_set *es);
+void set_win_sys_path_via_env (struct env_set *es);
+char *get_win_sys_path (void);
+
+/* call self in a subprocess */
+void fork_to_self (const char *cmdline);
+
+/* Find temporary directory */
+const char *win_get_tempdir();
+
+#endif
+#endif