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 "vchannel.h"

#include "resource.h"

#define APP_NAME "SeamlessRDP Shell"

/* Global data */
static HINSTANCE g_instance;

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

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;
        char title[150];
        LONG styles;
        int state;

        styles = GetWindowLong(hwnd, GWL_STYLE);

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

        vchannel_write("CREATE1,0x%p,0x%x", hwnd, 0);

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

        vchannel_write("POSITION1,0x%p,%d,%d,%d,%d,0x%x",
                       hwnd,
                       rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);

        GetWindowText(hwnd, title, sizeof(title));

        /* FIXME: Strip title of dangerous characters */

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

        vchannel_write("SETSTATE1,0x%p,%s,0x%x,0x%x", hwnd, title, 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
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)
        {
                debug("Got: %s", line);

                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();
        }
}

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");

        if (!set_hooks_fn || !remove_hooks_fn || !instance_count_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;
        }

        vchannel_open();

        set_hooks_fn();

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

                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
                        {
                                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);
                }
        }

        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
28	#include "vchannel.h"
29
30	#include "resource.h"
31
32	#define APP_NAME "SeamlessRDP Shell"
33
34	/* Global data */
35	static HINSTANCE g_instance;
36
37	typedef void (*set_hooks_proc_t) ();
38	typedef void (*remove_hooks_proc_t) ();
39	typedef int (*get_instance_count_proc_t) ();
40
41	static void
42	message(const char *text)
43	{
44	MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
45	}
46
47	static char *
48	get_token(char **s)
49	{
50	char comma, head;
51	head = *s;
52
53	if (!head)
54	return NULL;
55
56	comma = strchr(head, ',');
57	if (comma)
58	{
59	*comma = '\0';
60	*s = comma + 1;
61	}
62	else
63	{
64	*s = NULL;
65	}
66
67	return head;
68	}
69
70	static BOOL CALLBACK
71	enum_cb(HWND hwnd, LPARAM lparam)
72	{
73	RECT rect;
74	char title[150];
75	LONG styles;
76	int state;
77
78	styles = GetWindowLong(hwnd, GWL_STYLE);
79
80	if (!(styles & WS_VISIBLE))
81	return TRUE;
82
83	vchannel_write("CREATE1,0x%p,0x%x", hwnd, 0);
84
85	if (!GetWindowRect(hwnd, &rect))
86	{
87	debug("GetWindowRect failed!");
88	return TRUE;
89	}
90
91	vchannel_write("POSITION1,0x%p,%d,%d,%d,%d,0x%x",
92	hwnd,
93	rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
94
95	GetWindowText(hwnd, title, sizeof(title));
96
97	/* FIXME: Strip title of dangerous characters */
98
99	if (styles & WS_MAXIMIZE)
100	state = 2;
101	else if (styles & WS_MINIMIZE)
102	state = 1;
103	else
104	state = 0;
105
106	vchannel_write("SETSTATE1,0x%p,%s,0x%x,0x%x", hwnd, title, state, 0);
107
108	return TRUE;
109	}
110
111	static void
112	do_sync(void)
113	{
114	vchannel_block();
115
116	vchannel_write("SYNCBEGIN,0x0");
117
118	EnumWindows(enum_cb, 0);
119
120	vchannel_write("SYNCEND,0x0");
121
122	vchannel_unblock();
123	}
124
125	static void
126	process_cmds(void)
127	{
128	char line[VCHANNEL_MAX_LINE];
129	int size;
130
131	char p, tok1, tok2, tok3, tok4, tok5, tok6, tok7, *tok8;
132
133	while ((size = vchannel_read(line, sizeof(line))) >= 0)
134	{
135	debug("Got: %s", line);
136
137	p = line;
138
139	tok1 = get_token(&p);
140	tok2 = get_token(&p);
141	tok3 = get_token(&p);
142	tok4 = get_token(&p);
143	tok5 = get_token(&p);
144	tok6 = get_token(&p);
145	tok7 = get_token(&p);
146	tok8 = get_token(&p);
147
148	if (strcmp(tok1, "SYNC") == 0)
149	do_sync();
150	}
151	}
152
153	int WINAPI
154	WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
155	{
156	HMODULE hookdll;
157
158	set_hooks_proc_t set_hooks_fn;
159	remove_hooks_proc_t remove_hooks_fn;
160	get_instance_count_proc_t instance_count_fn;
161
162	g_instance = instance;
163
164	hookdll = LoadLibrary("seamlessrdp.dll");
165	if (!hookdll)
166	{
167	message("Could not load hook DLL. Unable to continue.");
168	return -1;
169	}
170
171	set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
172	remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
173	instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
174
175	if (!set_hooks_fn \|\| !remove_hooks_fn \|\| !instance_count_fn)
176	{
177	FreeLibrary(hookdll);
178	message("Hook DLL doesn't contain the correct functions. Unable to continue.");
179	return -1;
180	}
181
182	/* Check if the DLL is already loaded */
183	if (instance_count_fn() != 1)
184	{
185	FreeLibrary(hookdll);
186	message("Another running instance of Seamless RDP detected.");
187	return -1;
188	}
189
190	vchannel_open();
191
192	set_hooks_fn();
193
194	/* Since we don't see the entire desktop we must resize windows
195	immediatly. */
196	SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
197
198	if (strlen(cmdline) == 0)
199	{
200	message("No command line specified.");
201	return -1;
202	}
203	else
204	{
205	BOOL result;
206	DWORD exitcode;
207	PROCESS_INFORMATION proc_info;
208	STARTUPINFO startup_info;
209
210	memset(&startup_info, 0, sizeof(STARTUPINFO));
211	startup_info.cb = sizeof(STARTUPINFO);
212
213	result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
214	NULL, NULL, &startup_info, &proc_info);
215
216	if (result)
217	{
218	do
219	{
220	process_cmds();
221	Sleep(100);
222	GetExitCodeProcess(proc_info.hProcess, &exitcode);
223	}
224	while (exitcode == STILL_ACTIVE);
225
226	// Release handles
227	CloseHandle(proc_info.hProcess);
228	CloseHandle(proc_info.hThread);
229	}
230	else
231	{
232	// CreateProcess failed.
233	char msg[256];
234	_snprintf(msg, sizeof(msg),
235	"Unable to launch the requested application:\n%s", cmdline);
236	message(msg);
237	}
238	}
239
240	remove_hooks_fn();
241
242	FreeLibrary(hookdll);
243
244	vchannel_close();
245
246	return 1;
247	}