seamlessrdp/ServerExe/main.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Seamless windows - Remote server executable

   Based on code copyright (C) 2004-2005 Martin Wickett

   Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
   Copyright (C) Pierre Ossman <ossman@cendio.se> 2006

   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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#define WINVER 0x0501

#include <windows.h>
#include <stdio.h>
#include <wtsapi32.h>
#include <cchannel.h>

#include "vchannel.h"

#include "resource.h"

#define APP_NAME "SeamlessRDP Shell"

/* Global data */
static HINSTANCE g_instance;

static DWORD g_session_id;
static DWORD *g_startup_procs;
static int g_startup_num_procs;

static BOOL g_connected;
static BOOL g_desktop_hidden;

typedef void (*set_hooks_proc_t) ();
typedef void (*remove_hooks_proc_t) ();
typedef int (*get_instance_count_proc_t) ();

typedef void (*move_window_proc_t) (unsigned int serial, HWND hwnd, int x, int y, int width,
                                    int height);
typedef void (*zchange_proc_t) (unsigned int serial, HWND hwnd, HWND behind);
typedef void (*focus_proc_t) (unsigned int serial, HWND hwnd);
typedef void (*set_state_proc_t) (unsigned int serial, HWND hwnd, int state);

static move_window_proc_t g_move_window_fn = NULL;
static zchange_proc_t g_zchange_fn = NULL;
static focus_proc_t g_focus_fn = NULL;
static set_state_proc_t g_set_state_fn = NULL;

static void
message(const char *text)
{
        MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
}

static char *
get_token(char **s)
{
        char *comma, *head;
        head = *s;

        if (!head)
                return NULL;

        comma = strchr(head, ',');
        if (comma)
        {
                *comma = '\0';
                *s = comma + 1;
        }
        else
        {
                *s = NULL;
        }

        return head;
}

static BOOL CALLBACK
enum_cb(HWND hwnd, LPARAM lparam)
{
        RECT rect;
        unsigned short title[150];
        LONG styles;
        int state;
        HWND parent;
        DWORD pid;
        int flags;

        styles = GetWindowLong(hwnd, GWL_STYLE);

        if (!(styles & WS_VISIBLE))
                return TRUE;

        if (styles & WS_POPUP)
                parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
        else
                parent = NULL;

        GetWindowThreadProcessId(hwnd, &pid);

        flags = 0;
        if (styles & DS_MODALFRAME)
                flags |= SEAMLESS_CREATE_MODAL;

        vchannel_write("CREATE", "0x%08lx,0x%08lx,0x%08lx,0x%08x", (long) hwnd, (long) pid,
                       (long) parent, flags);

        if (!GetWindowRect(hwnd, &rect))
        {
                debug("GetWindowRect failed!");
                return TRUE;
        }

        vchannel_write("POSITION", "0x%08lx,%d,%d,%d,%d,0x%08x",
                       hwnd,
                       rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);

        GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));

        vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);

        if (styles & WS_MAXIMIZE)
                state = 2;
        else if (styles & WS_MINIMIZE)
                state = 1;
        else
                state = 0;

        vchannel_write("STATE", "0x%08lx,0x%08x,0x%08x", hwnd, state, 0);

        return TRUE;
}

static void
do_sync(void)
{
        vchannel_block();

        vchannel_write("SYNCBEGIN", "0x0");

        EnumWindows(enum_cb, 0);

        vchannel_write("SYNCEND", "0x0");

        vchannel_unblock();
}

static void
do_state(unsigned int serial, HWND hwnd, int state)
{
        g_set_state_fn(serial, hwnd, state);
}

static void
do_position(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
{
        g_move_window_fn(serial, hwnd, x, y, width, height);
}

static void
do_zchange(unsigned int serial, HWND hwnd, HWND behind)
{
        g_zchange_fn(serial, hwnd, behind);
}

static void
do_focus(unsigned int serial, HWND hwnd)
{
        g_focus_fn(serial, hwnd);
}

static void
process_cmds(void)
{
        char line[VCHANNEL_MAX_LINE];
        int size;

        char *p, *tok1, *tok2, *tok3, *tok4, *tok5, *tok6, *tok7, *tok8;

        while ((size = vchannel_read(line, sizeof(line))) >= 0)
        {
                p = line;

                tok1 = get_token(&p);
                tok2 = get_token(&p);
                tok3 = get_token(&p);
                tok4 = get_token(&p);
                tok5 = get_token(&p);
                tok6 = get_token(&p);
                tok7 = get_token(&p);
                tok8 = get_token(&p);

                if (strcmp(tok1, "SYNC") == 0)
                        do_sync();
                else if (strcmp(tok1, "STATE") == 0)
                        do_state(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                 strtol(tok4, NULL, 0));
                else if (strcmp(tok1, "POSITION") == 0)
                        do_position(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                    strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
                                                                                         0),
                                    strtol(tok7, NULL, 0));
                else if (strcmp(tok1, "ZCHANGE") == 0)
                        do_zchange(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                   (HWND) strtoul(tok4, NULL, 0));
                else if (strcmp(tok1, "FOCUS") == 0)
                        do_focus(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
        }
}

static BOOL
build_startup_procs(void)
{
        PWTS_PROCESS_INFO pinfo;
        DWORD i, j, count;

        if (!WTSEnumerateProcesses(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pinfo, &count))
                return FALSE;

        g_startup_num_procs = 0;

        for (i = 0; i < count; i++)
        {
                if (pinfo[i].SessionId != g_session_id)
                        continue;

                g_startup_num_procs++;
        }

        g_startup_procs = malloc(sizeof(DWORD) * g_startup_num_procs);

        j = 0;
        for (i = 0; i < count; i++)
        {
                if (pinfo[i].SessionId != g_session_id)
                        continue;

                g_startup_procs[j] = pinfo[i].ProcessId;
                j++;
        }

        WTSFreeMemory(pinfo);

        return TRUE;
}

static void
free_startup_procs(void)
{
        free(g_startup_procs);

        g_startup_procs = NULL;
        g_startup_num_procs = 0;
}

static BOOL
should_terminate(void)
{
        PWTS_PROCESS_INFO pinfo;
        DWORD i, j, count;

        if (!WTSEnumerateProcesses(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pinfo, &count))
                return TRUE;

        for (i = 0; i < count; i++)
        {
                if (pinfo[i].SessionId != g_session_id)
                        continue;

                for (j = 0; j < g_startup_num_procs; j++)
                {
                        if (pinfo[i].ProcessId == g_startup_procs[j])
                                break;
                }

                if (j == g_startup_num_procs)
                {
                        WTSFreeMemory(pinfo);
                        return FALSE;
                }
        }

        WTSFreeMemory(pinfo);

        return TRUE;
}

static BOOL
is_connected(void)
{
        BOOL res;
        INT *state;
        DWORD size;

        res = WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE,
                                         WTS_CURRENT_SESSION, WTSConnectState, (LPTSTR *) & state,
                                         &size);
        if (!res)
                return TRUE;

        res = *state == WTSActive;

        WTSFreeMemory(state);

        return res;
}

static BOOL
is_desktop_hidden(void)
{
        HDESK desk;

        /* We cannot get current desktop. But we can try to open the current
           desktop, which will most likely be a secure desktop (if it isn't
           ours), and will thus fail. */
        desk = OpenInputDesktop(0, FALSE, GENERIC_READ);
        if (desk)
                CloseDesktop(desk);

        return desk == NULL;
}

int WINAPI
WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
{
        HMODULE hookdll;

        set_hooks_proc_t set_hooks_fn;
        remove_hooks_proc_t remove_hooks_fn;
        get_instance_count_proc_t instance_count_fn;

        g_instance = instance;

        hookdll = LoadLibrary("seamlessrdp.dll");
        if (!hookdll)
        {
                message("Could not load hook DLL. Unable to continue.");
                return -1;
        }

        set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
        remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
        instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
        g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
        g_zchange_fn = (zchange_proc_t) GetProcAddress(hookdll, "SafeZChange");
        g_focus_fn = (focus_proc_t) GetProcAddress(hookdll, "SafeFocus");
        g_set_state_fn = (set_state_proc_t) GetProcAddress(hookdll, "SafeSetState");

        if (!set_hooks_fn || !remove_hooks_fn || !instance_count_fn || !g_move_window_fn
            || !g_zchange_fn || !g_focus_fn || !g_set_state_fn)
        {
                FreeLibrary(hookdll);
                message("Hook DLL doesn't contain the correct functions. Unable to continue.");
                return -1;
        }

        /* Check if the DLL is already loaded */
        if (instance_count_fn() != 1)
        {
                FreeLibrary(hookdll);
                message("Another running instance of Seamless RDP detected.");
                return -1;
        }

        ProcessIdToSessionId(GetCurrentProcessId(), &g_session_id);

        build_startup_procs();

        vchannel_open();

        g_connected = is_connected();
        g_desktop_hidden = is_desktop_hidden();

        vchannel_write("HELLO", "0x%08x", g_desktop_hidden ? SEAMLESS_HELLO_HIDDEN : 0);

        set_hooks_fn();

        /* Since we don't see the entire desktop we must resize windows
           immediatly. */
        SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);

        /* Disable screen saver since we cannot catch its windows. */
        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);

        /* We don't want windows denying requests to activate windows. */
        SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, 0, 0);

        if (strlen(cmdline) == 0)
        {
                message("No command line specified.");
                return -1;
        }
        else
        {
                BOOL result;
                PROCESS_INFORMATION proc_info;
                STARTUPINFO startup_info;
                MSG msg;

                memset(&startup_info, 0, sizeof(STARTUPINFO));
                startup_info.cb = sizeof(STARTUPINFO);

                result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
                                       NULL, NULL, &startup_info, &proc_info);
                // Release handles
                CloseHandle(proc_info.hProcess);
                CloseHandle(proc_info.hThread);

                if (result)
                {
                        int check_counter;

                        check_counter = 5;
                        while (check_counter-- || !should_terminate())
                        {
                                BOOL connected;

                                connected = is_connected();
                                if (connected && !g_connected)
                                {
                                        int flags;
                                        /* These get reset on each reconnect */
                                        SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
                                        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL,
                                                             0);
                                        SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, 0, 0);

                                        flags = SEAMLESS_HELLO_RECONNECT;
                                        if (g_desktop_hidden)
                                                flags |= SEAMLESS_HELLO_HIDDEN;
                                        vchannel_write("HELLO", "0x%08x", flags);
                                }

                                g_connected = connected;

                                if (check_counter < 0)
                                {
                                        BOOL hidden;

                                        hidden = is_desktop_hidden();
                                        if (hidden && !g_desktop_hidden)
                                                vchannel_write("HIDE", "0x%08x", 0);
                                        else if (!hidden && g_desktop_hidden)
                                                vchannel_write("UNHIDE", "0x%08x", 0);

                                        g_desktop_hidden = hidden;

                                        check_counter = 5;
                                }

                                while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
                                {
                                        TranslateMessage(&msg);
                                        DispatchMessage(&msg);
                                }
                                process_cmds();
                                Sleep(100);
                        }
                }
                else
                {
                        // CreateProcess failed.
                        char msg[256];
                        _snprintf(msg, sizeof(msg),
                                  "Unable to launch the requested application:\n%s", cmdline);
                        message(msg);
                }
        }

        remove_hooks_fn();

        FreeLibrary(hookdll);

        vchannel_close();

        free_startup_procs();

        return 1;
}
1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Seamless windows - Remote server executable
4
5	Based on code copyright (C) 2004-2005 Martin Wickett
6
7	Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
8	Copyright (C) Pierre Ossman <ossman@cendio.se> 2006
9
10	This program is free software; you can redistribute it and/or modify
11	it under the terms of the GNU General Public License as published by
12	the Free Software Foundation; either version 2 of the License, or
13	(at your option) any later version.
14
15	This program is distributed in the hope that it will be useful,
16	but WITHOUT ANY WARRANTY; without even the implied warranty of
17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	GNU General Public License for more details.
19
20	You should have received a copy of the GNU General Public License
21	along with this program; if not, write to the Free Software
22	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23	*/
24
25	#define WINVER 0x0501
26
27	#include <windows.h>
28	#include <stdio.h>
29	#include <wtsapi32.h>
30	#include <cchannel.h>
31
32	#include "vchannel.h"
33
34	#include "resource.h"
35
36	#define APP_NAME "SeamlessRDP Shell"
37
38	/* Global data */
39	static HINSTANCE g_instance;
40
41	static DWORD g_session_id;
42	static DWORD *g_startup_procs;
43	static int g_startup_num_procs;
44
45	static BOOL g_connected;
46	static BOOL g_desktop_hidden;
47
48	typedef void (*set_hooks_proc_t) ();
49	typedef void (*remove_hooks_proc_t) ();
50	typedef int (*get_instance_count_proc_t) ();
51
52	typedef void (*move_window_proc_t) (unsigned int serial, HWND hwnd, int x, int y, int width,
53	int height);
54	typedef void (*zchange_proc_t) (unsigned int serial, HWND hwnd, HWND behind);
55	typedef void (*focus_proc_t) (unsigned int serial, HWND hwnd);
56	typedef void (*set_state_proc_t) (unsigned int serial, HWND hwnd, int state);
57
58	static move_window_proc_t g_move_window_fn = NULL;
59	static zchange_proc_t g_zchange_fn = NULL;
60	static focus_proc_t g_focus_fn = NULL;
61	static set_state_proc_t g_set_state_fn = NULL;
62
63	static void
64	message(const char *text)
65	{
66	MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
67	}
68
69	static char *
70	get_token(char **s)
71	{
72	char comma, head;
73	head = *s;
74
75	if (!head)
76	return NULL;
77
78	comma = strchr(head, ',');
79	if (comma)
80	{
81	*comma = '\0';
82	*s = comma + 1;
83	}
84	else
85	{
86	*s = NULL;
87	}
88
89	return head;
90	}
91
92	static BOOL CALLBACK
93	enum_cb(HWND hwnd, LPARAM lparam)
94	{
95	RECT rect;
96	unsigned short title[150];
97	LONG styles;
98	int state;
99	HWND parent;
100	DWORD pid;
101	int flags;
102
103	styles = GetWindowLong(hwnd, GWL_STYLE);
104
105	if (!(styles & WS_VISIBLE))
106	return TRUE;
107
108	if (styles & WS_POPUP)
109	parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
110	else
111	parent = NULL;
112
113	GetWindowThreadProcessId(hwnd, &pid);
114
115	flags = 0;
116	if (styles & DS_MODALFRAME)
117	flags \|= SEAMLESS_CREATE_MODAL;
118
119	vchannel_write("CREATE", "0x%08lx,0x%08lx,0x%08lx,0x%08x", (long) hwnd, (long) pid,
120	(long) parent, flags);
121
122	if (!GetWindowRect(hwnd, &rect))
123	{
124	debug("GetWindowRect failed!");
125	return TRUE;
126	}
127
128	vchannel_write("POSITION", "0x%08lx,%d,%d,%d,%d,0x%08x",
129	hwnd,
130	rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
131
132	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
133
134	vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);
135
136	if (styles & WS_MAXIMIZE)
137	state = 2;
138	else if (styles & WS_MINIMIZE)
139	state = 1;
140	else
141	state = 0;
142
143	vchannel_write("STATE", "0x%08lx,0x%08x,0x%08x", hwnd, state, 0);
144
145	return TRUE;
146	}
147
148	static void
149	do_sync(void)
150	{
151	vchannel_block();
152
153	vchannel_write("SYNCBEGIN", "0x0");
154
155	EnumWindows(enum_cb, 0);
156
157	vchannel_write("SYNCEND", "0x0");
158
159	vchannel_unblock();
160	}
161
162	static void
163	do_state(unsigned int serial, HWND hwnd, int state)
164	{
165	g_set_state_fn(serial, hwnd, state);
166	}
167
168	static void
169	do_position(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
170	{
171	g_move_window_fn(serial, hwnd, x, y, width, height);
172	}
173
174	static void
175	do_zchange(unsigned int serial, HWND hwnd, HWND behind)
176	{
177	g_zchange_fn(serial, hwnd, behind);
178	}
179
180	static void
181	do_focus(unsigned int serial, HWND hwnd)
182	{
183	g_focus_fn(serial, hwnd);
184	}
185
186	static void
187	process_cmds(void)
188	{
189	char line[VCHANNEL_MAX_LINE];
190	int size;
191
192	char p, tok1, tok2, tok3, tok4, tok5, tok6, tok7, *tok8;
193
194	while ((size = vchannel_read(line, sizeof(line))) >= 0)
195	{
196	p = line;
197
198	tok1 = get_token(&p);
199	tok2 = get_token(&p);
200	tok3 = get_token(&p);
201	tok4 = get_token(&p);
202	tok5 = get_token(&p);
203	tok6 = get_token(&p);
204	tok7 = get_token(&p);
205	tok8 = get_token(&p);
206
207	if (strcmp(tok1, "SYNC") == 0)
208	do_sync();
209	else if (strcmp(tok1, "STATE") == 0)
210	do_state(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
211	strtol(tok4, NULL, 0));
212	else if (strcmp(tok1, "POSITION") == 0)
213	do_position(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
214	strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
215	0),
216	strtol(tok7, NULL, 0));
217	else if (strcmp(tok1, "ZCHANGE") == 0)
218	do_zchange(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
219	(HWND) strtoul(tok4, NULL, 0));
220	else if (strcmp(tok1, "FOCUS") == 0)
221	do_focus(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
222	}
223	}
224
225	static BOOL
226	build_startup_procs(void)
227	{
228	PWTS_PROCESS_INFO pinfo;
229	DWORD i, j, count;
230
231	if (!WTSEnumerateProcesses(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pinfo, &count))
232	return FALSE;
233
234	g_startup_num_procs = 0;
235
236	for (i = 0; i < count; i++)
237	{
238	if (pinfo[i].SessionId != g_session_id)
239	continue;
240
241	g_startup_num_procs++;
242	}
243
244	g_startup_procs = malloc(sizeof(DWORD) * g_startup_num_procs);
245
246	j = 0;
247	for (i = 0; i < count; i++)
248	{
249	if (pinfo[i].SessionId != g_session_id)
250	continue;
251
252	g_startup_procs[j] = pinfo[i].ProcessId;
253	j++;
254	}
255
256	WTSFreeMemory(pinfo);
257
258	return TRUE;
259	}
260
261	static void
262	free_startup_procs(void)
263	{
264	free(g_startup_procs);
265
266	g_startup_procs = NULL;
267	g_startup_num_procs = 0;
268	}
269
270	static BOOL
271	should_terminate(void)
272	{
273	PWTS_PROCESS_INFO pinfo;
274	DWORD i, j, count;
275
276	if (!WTSEnumerateProcesses(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pinfo, &count))
277	return TRUE;
278
279	for (i = 0; i < count; i++)
280	{
281	if (pinfo[i].SessionId != g_session_id)
282	continue;
283
284	for (j = 0; j < g_startup_num_procs; j++)
285	{
286	if (pinfo[i].ProcessId == g_startup_procs[j])
287	break;
288	}
289
290	if (j == g_startup_num_procs)
291	{
292	WTSFreeMemory(pinfo);
293	return FALSE;
294	}
295	}
296
297	WTSFreeMemory(pinfo);
298
299	return TRUE;
300	}
301
302	static BOOL
303	is_connected(void)
304	{
305	BOOL res;
306	INT *state;
307	DWORD size;
308
309	res = WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE,
310	WTS_CURRENT_SESSION, WTSConnectState, (LPTSTR *) & state,
311	&size);
312	if (!res)
313	return TRUE;
314
315	res = *state == WTSActive;
316
317	WTSFreeMemory(state);
318
319	return res;
320	}
321
322	static BOOL
323	is_desktop_hidden(void)
324	{
325	HDESK desk;
326
327	/* We cannot get current desktop. But we can try to open the current
328	desktop, which will most likely be a secure desktop (if it isn't
329	ours), and will thus fail. */
330	desk = OpenInputDesktop(0, FALSE, GENERIC_READ);
331	if (desk)
332	CloseDesktop(desk);
333
334	return desk == NULL;
335	}
336
337	int WINAPI
338	WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
339	{
340	HMODULE hookdll;
341
342	set_hooks_proc_t set_hooks_fn;
343	remove_hooks_proc_t remove_hooks_fn;
344	get_instance_count_proc_t instance_count_fn;
345
346	g_instance = instance;
347
348	hookdll = LoadLibrary("seamlessrdp.dll");
349	if (!hookdll)
350	{
351	message("Could not load hook DLL. Unable to continue.");
352	return -1;
353	}
354
355	set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
356	remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
357	instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
358	g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
359	g_zchange_fn = (zchange_proc_t) GetProcAddress(hookdll, "SafeZChange");
360	g_focus_fn = (focus_proc_t) GetProcAddress(hookdll, "SafeFocus");
361	g_set_state_fn = (set_state_proc_t) GetProcAddress(hookdll, "SafeSetState");
362
363	if (!set_hooks_fn \|\| !remove_hooks_fn \|\| !instance_count_fn \|\| !g_move_window_fn
364	\|\| !g_zchange_fn \|\| !g_focus_fn \|\| !g_set_state_fn)
365	{
366	FreeLibrary(hookdll);
367	message("Hook DLL doesn't contain the correct functions. Unable to continue.");
368	return -1;
369	}
370
371	/* Check if the DLL is already loaded */
372	if (instance_count_fn() != 1)
373	{
374	FreeLibrary(hookdll);
375	message("Another running instance of Seamless RDP detected.");
376	return -1;
377	}
378
379	ProcessIdToSessionId(GetCurrentProcessId(), &g_session_id);
380
381	build_startup_procs();
382
383	vchannel_open();
384
385	g_connected = is_connected();
386	g_desktop_hidden = is_desktop_hidden();
387
388	vchannel_write("HELLO", "0x%08x", g_desktop_hidden ? SEAMLESS_HELLO_HIDDEN : 0);
389
390	set_hooks_fn();
391
392	/* Since we don't see the entire desktop we must resize windows
393	immediatly. */
394	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
395
396	/* Disable screen saver since we cannot catch its windows. */
397	SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
398
399	/* We don't want windows denying requests to activate windows. */
400	SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, 0, 0);
401
402	if (strlen(cmdline) == 0)
403	{
404	message("No command line specified.");
405	return -1;
406	}
407	else
408	{
409	BOOL result;
410	PROCESS_INFORMATION proc_info;
411	STARTUPINFO startup_info;
412	MSG msg;
413
414	memset(&startup_info, 0, sizeof(STARTUPINFO));
415	startup_info.cb = sizeof(STARTUPINFO);
416
417	result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
418	NULL, NULL, &startup_info, &proc_info);
419	// Release handles
420	CloseHandle(proc_info.hProcess);
421	CloseHandle(proc_info.hThread);
422
423	if (result)
424	{
425	int check_counter;
426
427	check_counter = 5;
428	while (check_counter-- \|\| !should_terminate())
429	{
430	BOOL connected;
431
432	connected = is_connected();
433	if (connected && !g_connected)
434	{
435	int flags;
436	/* These get reset on each reconnect */
437	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
438	SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL,
439	0);
440	SystemParametersInfo(SPI_SETFOREGROUNDLOCKTIMEOUT, 0, 0, 0);
441
442	flags = SEAMLESS_HELLO_RECONNECT;
443	if (g_desktop_hidden)
444	flags \|= SEAMLESS_HELLO_HIDDEN;
445	vchannel_write("HELLO", "0x%08x", flags);
446	}
447
448	g_connected = connected;
449
450	if (check_counter < 0)
451	{
452	BOOL hidden;
453
454	hidden = is_desktop_hidden();
455	if (hidden && !g_desktop_hidden)
456	vchannel_write("HIDE", "0x%08x", 0);
457	else if (!hidden && g_desktop_hidden)
458	vchannel_write("UNHIDE", "0x%08x", 0);
459
460	g_desktop_hidden = hidden;
461
462	check_counter = 5;
463	}
464
465	while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
466	{
467	TranslateMessage(&msg);
468	DispatchMessage(&msg);
469	}
470	process_cmds();
471	Sleep(100);
472	}
473	}
474	else
475	{
476	// CreateProcess failed.
477	char msg[256];
478	_snprintf(msg, sizeof(msg),
479	"Unable to launch the requested application:\n%s", cmdline);
480	message(msg);
481	}
482	}
483
484	remove_hooks_fn();
485
486	FreeLibrary(hookdll);
487
488	vchannel_close();
489
490	free_startup_procs();
491
492	return 1;
493	}