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"

#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS"
static UINT g_wm_seamless_focus;

#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
do_focus(HWND hwnd)
{
/*      if (!AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId(hwnd, NULL), TRUE))
        {
                debug("Failed to attach");
                return;
        }
        SetFocus(hwnd);
        AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId(hwnd, NULL), FALSE)*/
        SendMessage(hwnd, g_wm_seamless_focus, 0, 0);
}

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));
                else if (strcmp(tok1, "FOCUS") == 0)
                        do_focus((HWND) strtoul(tok2, NULL, 0));
        }
}

static LRESULT CALLBACK
wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
        if (message == WM_WTSSESSION_CHANGE)
        {
                if (wparam == WTS_REMOTE_CONNECT)
                {
                        /* These get reset on each reconnect */
                        SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
                        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
                        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;
        }

        g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME);

        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	#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS"
37	static UINT g_wm_seamless_focus;
38
39	#ifndef WM_WTSSESSION_CHANGE
40	#define WM_WTSSESSION_CHANGE 0x02B1
41	#endif
42	#ifndef WTS_REMOTE_CONNECT
43	#define WTS_REMOTE_CONNECT 0x3
44	#endif
45
46	/* Global data */
47	static HINSTANCE g_instance;
48	static HWND g_hwnd;
49
50	typedef void (*set_hooks_proc_t) ();
51	typedef void (*remove_hooks_proc_t) ();
52	typedef int (*get_instance_count_proc_t) ();
53
54	typedef void (*move_window_proc_t) (HWND hwnd, int x, int y, int width, int height);
55
56	static move_window_proc_t g_move_window_fn = NULL;
57
58	static void
59	message(const char *text)
60	{
61	MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
62	}
63
64	static char *
65	get_token(char **s)
66	{
67	char comma, head;
68	head = *s;
69
70	if (!head)
71	return NULL;
72
73	comma = strchr(head, ',');
74	if (comma)
75	{
76	*comma = '\0';
77	*s = comma + 1;
78	}
79	else
80	{
81	*s = NULL;
82	}
83
84	return head;
85	}
86
87	static BOOL CALLBACK
88	enum_cb(HWND hwnd, LPARAM lparam)
89	{
90	RECT rect;
91	unsigned short title[150];
92	LONG styles;
93	int state;
94	HWND parent;
95
96	styles = GetWindowLong(hwnd, GWL_STYLE);
97
98	if (!(styles & WS_VISIBLE))
99	return TRUE;
100
101	if (styles & WS_POPUP)
102	parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
103	else
104	parent = NULL;
105
106	vchannel_write("CREATE,0x%p,0x%p,0x%x", hwnd, parent, 0);
107
108	if (!GetWindowRect(hwnd, &rect))
109	{
110	debug("GetWindowRect failed!");
111	return TRUE;
112	}
113
114	vchannel_write("POSITION,0x%p,%d,%d,%d,%d,0x%x",
115	hwnd,
116	rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
117
118	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
119
120	vchannel_write("TITLE,0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);
121
122	if (styles & WS_MAXIMIZE)
123	state = 2;
124	else if (styles & WS_MINIMIZE)
125	state = 1;
126	else
127	state = 0;
128
129	vchannel_write("STATE,0x%p,0x%x,0x%x", hwnd, state, 0);
130
131	return TRUE;
132	}
133
134	static void
135	do_sync(void)
136	{
137	vchannel_block();
138
139	vchannel_write("SYNCBEGIN,0x0");
140
141	EnumWindows(enum_cb, 0);
142
143	vchannel_write("SYNCEND,0x0");
144
145	vchannel_unblock();
146	}
147
148	static void
149	do_state(HWND hwnd, int state)
150	{
151	if (state == 0)
152	ShowWindow(hwnd, SW_RESTORE);
153	else if (state == 1)
154	ShowWindow(hwnd, SW_MINIMIZE);
155	else if (state == 2)
156	ShowWindow(hwnd, SW_MAXIMIZE);
157	else
158	debug("Invalid state %d sent.", state);
159	}
160
161	static void
162	do_position(HWND hwnd, int x, int y, int width, int height)
163	{
164	g_move_window_fn(hwnd, x, y, width, height);
165	}
166
167	static void
168	do_zchange(HWND hwnd, HWND behind)
169	{
170	if (behind == NULL)
171	behind = HWND_TOP;
172	SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE \| SWP_NOMOVE \| SWP_NOSIZE);
173	}
174
175	static void
176	do_focus(HWND hwnd)
177	{
178	/* if (!AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId(hwnd, NULL), TRUE))
179	{
180	debug("Failed to attach");
181	return;
182	}
183	SetFocus(hwnd);
184	AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId(hwnd, NULL), FALSE)*/
185	SendMessage(hwnd, g_wm_seamless_focus, 0, 0);
186	}
187
188	static void
189	process_cmds(void)
190	{
191	char line[VCHANNEL_MAX_LINE];
192	int size;
193
194	char p, tok1, tok2, tok3, tok4, tok5, tok6, tok7, *tok8;
195
196	while ((size = vchannel_read(line, sizeof(line))) >= 0)
197	{
198	p = line;
199
200	tok1 = get_token(&p);
201	tok2 = get_token(&p);
202	tok3 = get_token(&p);
203	tok4 = get_token(&p);
204	tok5 = get_token(&p);
205	tok6 = get_token(&p);
206	tok7 = get_token(&p);
207	tok8 = get_token(&p);
208
209	if (strcmp(tok1, "SYNC") == 0)
210	do_sync();
211	else if (strcmp(tok1, "STATE") == 0)
212	do_state((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0));
213	else if (strcmp(tok1, "POSITION") == 0)
214	do_position((HWND) strtoul(tok2, NULL, 0), strtol(tok3, NULL, 0),
215	strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
216	0));
217	else if (strcmp(tok1, "ZCHANGE") == 0)
218	do_zchange((HWND) strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
219	else if (strcmp(tok1, "FOCUS") == 0)
220	do_focus((HWND) strtoul(tok2, NULL, 0));
221	}
222	}
223
224	static LRESULT CALLBACK
225	wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
226	{
227	if (message == WM_WTSSESSION_CHANGE)
228	{
229	if (wparam == WTS_REMOTE_CONNECT)
230	{
231	/* These get reset on each reconnect */
232	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
233	SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
234	vchannel_write("HELLO,0x%08x", 1);
235	}
236	}
237
238	return DefWindowProc(hwnd, message, wparam, lparam);
239	}
240
241	static BOOL
242	register_class(void)
243	{
244	WNDCLASSEX wcx;
245
246	memset(&wcx, 0, sizeof(wcx));
247
248	wcx.cbSize = sizeof(wcx);
249	wcx.lpfnWndProc = wndproc;
250	wcx.hInstance = g_instance;
251	wcx.lpszClassName = "SeamlessClass";
252
253	return RegisterClassEx(&wcx);
254	}
255
256	static BOOL
257	create_wnd(void)
258	{
259	if (!register_class())
260	return FALSE;
261
262	g_hwnd = CreateWindow("SeamlessClass",
263	"Seamless Window",
264	WS_OVERLAPPEDWINDOW,
265	CW_USEDEFAULT,
266	CW_USEDEFAULT,
267	CW_USEDEFAULT,
268	CW_USEDEFAULT, (HWND) NULL, (HMENU) NULL, g_instance, (LPVOID) NULL);
269
270	if (!g_hwnd)
271	return FALSE;
272
273	return TRUE;
274	}
275
276	int WINAPI
277	WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
278	{
279	HMODULE hookdll;
280
281	set_hooks_proc_t set_hooks_fn;
282	remove_hooks_proc_t remove_hooks_fn;
283	get_instance_count_proc_t instance_count_fn;
284
285	g_instance = instance;
286
287	hookdll = LoadLibrary("seamlessrdp.dll");
288	if (!hookdll)
289	{
290	message("Could not load hook DLL. Unable to continue.");
291	return -1;
292	}
293
294	set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
295	remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
296	instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
297	g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
298
299	if (!set_hooks_fn \|\| !remove_hooks_fn \|\| !instance_count_fn \|\| !g_move_window_fn)
300	{
301	FreeLibrary(hookdll);
302	message("Hook DLL doesn't contain the correct functions. Unable to continue.");
303	return -1;
304	}
305
306	/* Check if the DLL is already loaded */
307	if (instance_count_fn() != 1)
308	{
309	FreeLibrary(hookdll);
310	message("Another running instance of Seamless RDP detected.");
311	return -1;
312	}
313
314	if (!create_wnd())
315	{
316	FreeLibrary(hookdll);
317	message("Couldn't create a window to catch events.");
318	return -1;
319	}
320
321	g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME);
322
323	WTSRegisterSessionNotification(g_hwnd, NOTIFY_FOR_THIS_SESSION);
324
325	vchannel_open();
326
327	vchannel_write("HELLO,0x%08x", 0);
328
329	set_hooks_fn();
330
331	/* Since we don't see the entire desktop we must resize windows
332	immediatly. */
333	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
334
335	/* Disable screen saver since we cannot catch its windows. */
336	SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
337
338	if (strlen(cmdline) == 0)
339	{
340	message("No command line specified.");
341	return -1;
342	}
343	else
344	{
345	BOOL result;
346	DWORD exitcode;
347	PROCESS_INFORMATION proc_info;
348	STARTUPINFO startup_info;
349	MSG msg;
350
351	memset(&startup_info, 0, sizeof(STARTUPINFO));
352	startup_info.cb = sizeof(STARTUPINFO);
353
354	result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
355	NULL, NULL, &startup_info, &proc_info);
356
357	if (result)
358	{
359	do
360	{
361	while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
362	{
363	TranslateMessage(&msg);
364	DispatchMessage(&msg);
365	}
366	process_cmds();
367	Sleep(100);
368	GetExitCodeProcess(proc_info.hProcess, &exitcode);
369	}
370	while (exitcode == STILL_ACTIVE);
371
372	// Release handles
373	CloseHandle(proc_info.hProcess);
374	CloseHandle(proc_info.hThread);
375	}
376	else
377	{
378	// CreateProcess failed.
379	char msg[256];
380	_snprintf(msg, sizeof(msg),
381	"Unable to launch the requested application:\n%s", cmdline);
382	message(msg);
383	}
384	}
385
386	WTSUnRegisterSessionNotification(g_hwnd);
387
388	remove_hooks_fn();
389
390	FreeLibrary(hookdll);
391
392	vchannel_close();
393
394	return 1;
395	}