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.
*/

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

#include "vchannel.h"

#include "resource.h"

#define APP_NAME "SeamlessRDP Shell"

#ifndef WM_WTSSESSION_CHANGE
#define WM_WTSSESSION_CHANGE 0x02B1
#endif
#ifndef WTS_REMOTE_CONNECT
#define WTS_REMOTE_CONNECT 0x3
#endif

/* Global data */
static HINSTANCE g_instance;
static HWND g_hwnd;

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) (HWND hwnd, int x, int y, int width, int height);

static move_window_proc_t g_move_window_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;

        styles = GetWindowLong(hwnd, GWL_STYLE);

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

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

        vchannel_write("CREATE,0x%p,0x%p,0x%x", hwnd, parent, 0);

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

        vchannel_write("POSITION,0x%p,%d,%d,%d,%d,0x%x",
                       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%p,0x%x,0x%x", 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(HWND hwnd, int state)
{
        if (state == 0)
                ShowWindow(hwnd, SW_RESTORE);
        else if (state == 1)
                ShowWindow(hwnd, SW_MINIMIZE);
        else if (state == 2)
                ShowWindow(hwnd, SW_MAXIMIZE);
        else
                debug("Invalid state %d sent.", state);
}

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

static void
do_zchange(HWND hwnd, HWND behind)
{
        if (behind == NULL)
                behind = HWND_TOP;
        SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
}

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((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0));
                else if (strcmp(tok1, "POSITION") == 0)
                        do_position((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0),
                                    strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
                                                                                         0));
                else if (strcmp(tok1, "ZCHANGE") == 0)
                        do_zchange((HWND) strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
        }
}

static LRESULT CALLBACK
wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
        if (message == WM_WTSSESSION_CHANGE)
        {
                if (wparam == WTS_REMOTE_CONNECT)
                        vchannel_write("HELLO,0x%08x", 1);
        }

        return DefWindowProc(hwnd, message, wparam, lparam);
}

static BOOL
register_class(void)
{
        WNDCLASSEX wcx;

        memset(&wcx, 0, sizeof(wcx));

        wcx.cbSize = sizeof(wcx);
        wcx.lpfnWndProc = wndproc;
        wcx.hInstance = g_instance;
        wcx.lpszClassName = "SeamlessClass";

        return RegisterClassEx(&wcx);
}

static BOOL
create_wnd(void)
{
        if (!register_class())
                return FALSE;

        g_hwnd = CreateWindow("SeamlessClass",
                              "Seamless Window",
                              WS_OVERLAPPEDWINDOW,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT, (HWND) NULL, (HMENU) NULL, g_instance, (LPVOID) NULL);

        if (!g_hwnd)
                return FALSE;

        return TRUE;
}

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");

        if (!set_hooks_fn || !remove_hooks_fn || !instance_count_fn || !g_move_window_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;
        }

        if (!create_wnd())
        {
                FreeLibrary(hookdll);
                message("Couldn't create a window to catch events.");
                return -1;
        }

        WTSRegisterSessionNotification(g_hwnd, NOTIFY_FOR_THIS_SESSION);

        vchannel_open();

        vchannel_write("HELLO,0x%08x", 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);

        if (strlen(cmdline) == 0)
        {
                message("No command line specified.");
                return -1;
        }
        else
        {
                BOOL result;
                DWORD exitcode;
                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);

                if (result)
                {
                        do
                        {
                                while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
                                {
                                        TranslateMessage(&msg);
                                        DispatchMessage(&msg);
                                }
                                process_cmds();
                                Sleep(100);
                                GetExitCodeProcess(proc_info.hProcess, &exitcode);
                        }
                        while (exitcode == STILL_ACTIVE);

                        // Release handles
                        CloseHandle(proc_info.hProcess);
                        CloseHandle(proc_info.hThread);
                }
                else
                {
                        // CreateProcess failed.
                        char msg[256];
                        _snprintf(msg, sizeof(msg),
                                  "Unable to launch the requested application:\n%s", cmdline);
                        message(msg);
                }
        }

        WTSUnRegisterSessionNotification(g_hwnd);

        remove_hooks_fn();

        FreeLibrary(hookdll);

        vchannel_close();

        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	#include <windows.h>
26	#include <stdio.h>
27	#include <wtsapi32.h>
28	#include <cchannel.h>
29
30	#include "vchannel.h"
31
32	#include "resource.h"
33
34	#define APP_NAME "SeamlessRDP Shell"
35
36	#ifndef WM_WTSSESSION_CHANGE
37	#define WM_WTSSESSION_CHANGE 0x02B1
38	#endif
39	#ifndef WTS_REMOTE_CONNECT
40	#define WTS_REMOTE_CONNECT 0x3
41	#endif
42
43	/* Global data */
44	static HINSTANCE g_instance;
45	static HWND g_hwnd;
46
47	typedef void (*set_hooks_proc_t) ();
48	typedef void (*remove_hooks_proc_t) ();
49	typedef int (*get_instance_count_proc_t) ();
50
51	typedef void (*move_window_proc_t) (HWND hwnd, int x, int y, int width, int height);
52
53	static move_window_proc_t g_move_window_fn = NULL;
54
55	static void
56	message(const char *text)
57	{
58	MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
59	}
60
61	static char *
62	get_token(char **s)
63	{
64	char comma, head;
65	head = *s;
66
67	if (!head)
68	return NULL;
69
70	comma = strchr(head, ',');
71	if (comma)
72	{
73	*comma = '\0';
74	*s = comma + 1;
75	}
76	else
77	{
78	*s = NULL;
79	}
80
81	return head;
82	}
83
84	static BOOL CALLBACK
85	enum_cb(HWND hwnd, LPARAM lparam)
86	{
87	RECT rect;
88	unsigned short title[150];
89	LONG styles;
90	int state;
91	HWND parent;
92
93	styles = GetWindowLong(hwnd, GWL_STYLE);
94
95	if (!(styles & WS_VISIBLE))
96	return TRUE;
97
98	if (styles & WS_POPUP)
99	parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
100	else
101	parent = NULL;
102
103	vchannel_write("CREATE,0x%p,0x%p,0x%x", hwnd, parent, 0);
104
105	if (!GetWindowRect(hwnd, &rect))
106	{
107	debug("GetWindowRect failed!");
108	return TRUE;
109	}
110
111	vchannel_write("POSITION,0x%p,%d,%d,%d,%d,0x%x",
112	hwnd,
113	rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
114
115	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
116
117	vchannel_write("TITLE,0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);
118
119	if (styles & WS_MAXIMIZE)
120	state = 2;
121	else if (styles & WS_MINIMIZE)
122	state = 1;
123	else
124	state = 0;
125
126	vchannel_write("STATE,0x%p,0x%x,0x%x", hwnd, state, 0);
127
128	return TRUE;
129	}
130
131	static void
132	do_sync(void)
133	{
134	vchannel_block();
135
136	vchannel_write("SYNCBEGIN,0x0");
137
138	EnumWindows(enum_cb, 0);
139
140	vchannel_write("SYNCEND,0x0");
141
142	vchannel_unblock();
143	}
144
145	static void
146	do_state(HWND hwnd, int state)
147	{
148	if (state == 0)
149	ShowWindow(hwnd, SW_RESTORE);
150	else if (state == 1)
151	ShowWindow(hwnd, SW_MINIMIZE);
152	else if (state == 2)
153	ShowWindow(hwnd, SW_MAXIMIZE);
154	else
155	debug("Invalid state %d sent.", state);
156	}
157
158	static void
159	do_position(HWND hwnd, int x, int y, int width, int height)
160	{
161	g_move_window_fn(hwnd, x, y, width, height);
162	}
163
164	static void
165	do_zchange(HWND hwnd, HWND behind)
166	{
167	if (behind == NULL)
168	behind = HWND_TOP;
169	SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE \| SWP_NOMOVE \| SWP_NOSIZE);
170	}
171
172	static void
173	process_cmds(void)
174	{
175	char line[VCHANNEL_MAX_LINE];
176	int size;
177
178	char p, tok1, tok2, tok3, tok4, tok5, tok6, tok7, *tok8;
179
180	while ((size = vchannel_read(line, sizeof(line))) >= 0)
181	{
182	p = line;
183
184	tok1 = get_token(&p);
185	tok2 = get_token(&p);
186	tok3 = get_token(&p);
187	tok4 = get_token(&p);
188	tok5 = get_token(&p);
189	tok6 = get_token(&p);
190	tok7 = get_token(&p);
191	tok8 = get_token(&p);
192
193	if (strcmp(tok1, "SYNC") == 0)
194	do_sync();
195	else if (strcmp(tok1, "STATE") == 0)
196	do_state((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0));
197	else if (strcmp(tok1, "POSITION") == 0)
198	do_position((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0),
199	strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
200	0));
201	else if (strcmp(tok1, "ZCHANGE") == 0)
202	do_zchange((HWND) strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
203	}
204	}
205
206	static LRESULT CALLBACK
207	wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
208	{
209	if (message == WM_WTSSESSION_CHANGE)
210	{
211	if (wparam == WTS_REMOTE_CONNECT)
212	vchannel_write("HELLO,0x%08x", 1);
213	}
214
215	return DefWindowProc(hwnd, message, wparam, lparam);
216	}
217
218	static BOOL
219	register_class(void)
220	{
221	WNDCLASSEX wcx;
222
223	memset(&wcx, 0, sizeof(wcx));
224
225	wcx.cbSize = sizeof(wcx);
226	wcx.lpfnWndProc = wndproc;
227	wcx.hInstance = g_instance;
228	wcx.lpszClassName = "SeamlessClass";
229
230	return RegisterClassEx(&wcx);
231	}
232
233	static BOOL
234	create_wnd(void)
235	{
236	if (!register_class())
237	return FALSE;
238
239	g_hwnd = CreateWindow("SeamlessClass",
240	"Seamless Window",
241	WS_OVERLAPPEDWINDOW,
242	CW_USEDEFAULT,
243	CW_USEDEFAULT,
244	CW_USEDEFAULT,
245	CW_USEDEFAULT, (HWND) NULL, (HMENU) NULL, g_instance, (LPVOID) NULL);
246
247	if (!g_hwnd)
248	return FALSE;
249
250	return TRUE;
251	}
252
253	int WINAPI
254	WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
255	{
256	HMODULE hookdll;
257
258	set_hooks_proc_t set_hooks_fn;
259	remove_hooks_proc_t remove_hooks_fn;
260	get_instance_count_proc_t instance_count_fn;
261
262	g_instance = instance;
263
264	hookdll = LoadLibrary("seamlessrdp.dll");
265	if (!hookdll)
266	{
267	message("Could not load hook DLL. Unable to continue.");
268	return -1;
269	}
270
271	set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
272	remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
273	instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
274	g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
275
276	if (!set_hooks_fn \|\| !remove_hooks_fn \|\| !instance_count_fn \|\| !g_move_window_fn)
277	{
278	FreeLibrary(hookdll);
279	message("Hook DLL doesn't contain the correct functions. Unable to continue.");
280	return -1;
281	}
282
283	/* Check if the DLL is already loaded */
284	if (instance_count_fn() != 1)
285	{
286	FreeLibrary(hookdll);
287	message("Another running instance of Seamless RDP detected.");
288	return -1;
289	}
290
291	if (!create_wnd())
292	{
293	FreeLibrary(hookdll);
294	message("Couldn't create a window to catch events.");
295	return -1;
296	}
297
298	WTSRegisterSessionNotification(g_hwnd, NOTIFY_FOR_THIS_SESSION);
299
300	vchannel_open();
301
302	vchannel_write("HELLO,0x%08x", 0);
303
304	set_hooks_fn();
305
306	/* Since we don't see the entire desktop we must resize windows
307	immediatly. */
308	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
309
310	/* Disable screen saver since we cannot catch its windows. */
311	SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
312
313	if (strlen(cmdline) == 0)
314	{
315	message("No command line specified.");
316	return -1;
317	}
318	else
319	{
320	BOOL result;
321	DWORD exitcode;
322	PROCESS_INFORMATION proc_info;
323	STARTUPINFO startup_info;
324	MSG msg;
325
326	memset(&startup_info, 0, sizeof(STARTUPINFO));
327	startup_info.cb = sizeof(STARTUPINFO);
328
329	result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
330	NULL, NULL, &startup_info, &proc_info);
331
332	if (result)
333	{
334	do
335	{
336	while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
337	{
338	TranslateMessage(&msg);
339	DispatchMessage(&msg);
340	}
341	process_cmds();
342	Sleep(100);
343	GetExitCodeProcess(proc_info.hProcess, &exitcode);
344	}
345	while (exitcode == STILL_ACTIVE);
346
347	// Release handles
348	CloseHandle(proc_info.hProcess);
349	CloseHandle(proc_info.hThread);
350	}
351	else
352	{
353	// CreateProcess failed.
354	char msg[256];
355	_snprintf(msg, sizeof(msg),
356	"Unable to launch the requested application:\n%s", cmdline);
357	message(msg);
358	}
359	}
360
361	WTSUnRegisterSessionNotification(g_hwnd);
362
363	remove_hooks_fn();
364
365	FreeLibrary(hookdll);
366
367	vchannel_close();
368
369	return 1;
370	}