trunk/rdesktop/rdesktop.c

/*
   rdesktop: A Remote Desktop Protocol client.
   Entrypoint and utility functions
   Copyright (C) Matthew Chapman 1999-2001
   
   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 <stdlib.h>             /* malloc realloc free */
#include <stdarg.h>             /* va_list va_start va_end */
#include <unistd.h>             /* read close getuid getgid getpid getppid gethostname */
#include <fcntl.h>              /* open */
#include <pwd.h>                /* getpwuid */
#include <limits.h>             /* PATH_MAX */
#include <sys/stat.h>           /* stat */
#include <sys/time.h>           /* gettimeofday */
#include <sys/times.h>          /* times */
#include "rdesktop.h"

char username[16];
char hostname[16];
char keymapname[16];
int keylayout;
int width;
int height;
BOOL bitmap_compression = True;
BOOL sendmotion = True;
BOOL orders = True;
BOOL licence = True;
BOOL encryption = True;
BOOL desktop_save = True;
BOOL fullscreen = False;

/* Display usage information */
static void
usage(char *program)
{
        printf("Usage: %s [options] server\n", program);
        printf("   -u: user name\n");
        printf("   -d: domain\n");
        printf("   -s: shell\n");
        printf("   -c: working directory\n");
        printf("   -p: password (autologon)\n");
        printf("   -n: client hostname\n");
        printf("   -k: keyboard layout\n");
        printf("   -g: desktop geometry (WxH)\n");
        printf("   -f: full-screen mode\n");
        printf("   -b: force bitmap updates\n");
        printf("   -e: disable encryption (French TS)\n");
        printf("   -m: do not send motion events\n");
        printf("   -l: do not request licence\n\n");
}

/* Client program */
int
main(int argc, char *argv[])
{
        char fullhostname[64];
        char domain[16];
        char password[16];
        char shell[32];
        char directory[32];
        char title[32];
        struct passwd *pw;
        char *server, *p;
        uint32 flags;
        int c;

        printf("rdesktop: A Remote Desktop Protocol client.\n");
        printf("Version " VERSION ". Copyright (C) 1999-2001 Matt Chapman.\n");
        printf("See http://www.rdesktop.org/ for more information.\n\n");

        flags = RDP_LOGON_NORMAL;
        domain[0] = password[0] = shell[0] = directory[0] = 0;
        strcpy(keymapname, "us");

        while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemlh?")) != -1)
        {
                switch (c)
                {
                        case 'u':
                                STRNCPY(username, optarg, sizeof(username));
                                break;

                        case 'd':
                                STRNCPY(domain, optarg, sizeof(domain));
                                break;

                        case 's':
                                STRNCPY(shell, optarg, sizeof(shell));
                                break;

                        case 'c':
                                STRNCPY(directory, optarg, sizeof(directory));
                                break;

                        case 'p':
                                STRNCPY(password, optarg, sizeof(password));
                                flags |= RDP_LOGON_AUTO;
                                break;

                        case 'n':
                                STRNCPY(hostname, optarg, sizeof(hostname));
                                break;

                        case 'k':
                                STRNCPY(keymapname, optarg, sizeof(keymapname));
                                break;

                        case 'g':
                                width = strtol(optarg, &p, 10);
                                if (*p == 'x')
                                        height = strtol(p+1, NULL, 10);

                                if ((width == 0) || (height == 0))
                                {
                                        error("invalid geometry\n");
                                        return 1;
                                }
                                break;

                        case 'f':
                                fullscreen = True;
                                break;

                        case 'b':
                                orders = False;
                                break;

                        case 'e':
                                encryption = False;
                                break;

                        case 'm':
                                sendmotion = False;
                                break;

                        case 'l':
                                licence = False;
                                break;

                        case 'h':
                        case '?':
                        default:
                                usage(argv[0]);
                                return 1;
                }
        }

        if (argc - optind < 1)
        {
                usage(argv[0]);
                return 1;
        }

        server = argv[optind];

        if (username[0] == 0)
        {
                pw = getpwuid(getuid());
                if ((pw == NULL) || (pw->pw_name == NULL))
                {
                        error("could not determine username, use -u\n");
                        return 1;
                }

                STRNCPY(username, pw->pw_name, sizeof(username));
        }

        if (hostname[0] == 0)
        {
                if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
                {
                        error("could not determine local hostname, use -n\n");
                        return 1;
                }

                p = strchr(fullhostname, '.');
                if (p != NULL)
                        *p = 0;

                STRNCPY(hostname, fullhostname, sizeof(hostname));
        }

        if (!strcmp(password, "-"))
        {
                p = getpass("Password: ");
                if (p == NULL)
                {
                        error("failed to read password\n");
                        return 0;
                }
                STRNCPY(password, p, sizeof(password));
        }

        if ((width == 0) || (height == 0))
        {
                width = 800;
                height = 600;
        }

        strcpy(title, "rdesktop - ");
        strncat(title, server, sizeof(title) - sizeof("rdesktop - "));

        if (ui_create_window(title))
        {
                if (!rdp_connect(server, flags, domain, password, shell,
                                 directory))
                        return 1;

                printf("Connection successful.\n");
                rdp_main_loop();
                printf("Disconnecting...\n");
                ui_destroy_window();
                rdp_disconnect();
        }

        return 0;
}

/* Generate a 32-byte random for the secure transport code. */
void
generate_random(uint8 *random)
{
        struct stat st;
        struct tms tmsbuf;
        uint32 *r = (uint32 *) random;
        int fd;

        /* If we have a kernel random device, use it. */
        if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
            || ((fd = open("/dev/random", O_RDONLY)) != -1))
        {
                read(fd, random, 32);
                close(fd);
                return;
        }

        /* Otherwise use whatever entropy we can gather - ideas welcome. */
        r[0] = (getpid()) | (getppid() << 16);
        r[1] = (getuid()) | (getgid() << 16);
        r[2] = times(&tmsbuf);  /* system uptime (clocks) */
        gettimeofday((struct timeval *) &r[3], NULL);   /* sec and usec */
        stat("/tmp", &st);
        r[5] = st.st_atime;
        r[6] = st.st_mtime;
        r[7] = st.st_ctime;
}

/* malloc; exit if out of memory */
void *
xmalloc(int size)
{
        void *mem = malloc(size);
        if (mem == NULL)
        {
                error("xmalloc %d\n", size);
                exit(1);
        }
        return mem;
}

/* realloc; exit if out of memory */
void *
xrealloc(void *oldmem, int size)
{
        void *mem = realloc(oldmem, size);
        if (mem == NULL)
        {
                error("xrealloc %d\n", size);
                exit(1);
        }
        return mem;
}

/* free */
void
xfree(void *mem)
{
        free(mem);
}

/* report an error */
void
error(char *format, ...)
{
        va_list ap;

        fprintf(stderr, "ERROR: ");

        va_start(ap, format);
        vfprintf(stderr, format, ap);
        va_end(ap);
}

/* report an unimplemented protocol feature */
void
unimpl(char *format, ...)
{
        va_list ap;

        fprintf(stderr, "NOT IMPLEMENTED: ");

        va_start(ap, format);
        vfprintf(stderr, format, ap);
        va_end(ap);
}

/* produce a hex dump */
void
hexdump(unsigned char *p, unsigned int len)
{
        unsigned char *line = p;
        unsigned int thisline, offset = 0;
        int i;

        while (offset < len)
        {
                printf("%04x ", offset);
                thisline = len - offset;
                if (thisline > 16)
                        thisline = 16;

                for (i = 0; i < thisline; i++)
                        printf("%02x ", line[i]);

                for (; i < 16; i++)
                                printf("   ");

                for (i = 0; i < thisline; i++)
                        printf("%c",
                               (line[i] >= 0x20
                                && line[i] < 0x7f) ? line[i] : '.');

                printf("\n");
                offset += thisline;
                line += thisline;
        }
}

int
load_licence(unsigned char **data)
{
        char path[PATH_MAX];
        char *home;
        struct stat st;
        int fd;

        home = getenv("HOME");
        if (home == NULL)
                return -1;

        STRNCPY(path, home, sizeof(path));
        strncat(path, "/.rdesktop/licence", sizeof(path)-strlen(path)-1);

        fd = open(path, O_RDONLY);
        if (fd == -1)
                return -1;

        if (fstat(fd, &st))
                return -1;

        *data = xmalloc(st.st_size);
        return read(fd, *data, st.st_size);
}

void
save_licence(unsigned char *data, int length)
{
        char path[PATH_MAX];
        char *home;
        int fd;

        home = getenv("HOME");
        if (home == NULL)
                return;

        STRNCPY(path, home, sizeof(path));
        strncat(path, "/.rdesktop", sizeof(path)-strlen(path)-1);
        mkdir(path, 0700);

        strncat(path, "/licence", sizeof(path)-strlen(path)-1);

        fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0600);
        if (fd == -1)
        {
                perror("open");
                return;
        }

        write(fd, data, length);
        close(fd);
}

1	/*
2	rdesktop: A Remote Desktop Protocol client.
3	Entrypoint and utility functions
4	Copyright (C) Matthew Chapman 1999-2001
5
6	This program is free software; you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2 of the License, or
9	(at your option) any later version.
10
11	This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.
15
16	You should have received a copy of the GNU General Public License
17	along with this program; if not, write to the Free Software
18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19	*/
20
21	#include <stdlib.h> /* malloc realloc free */
22	#include <stdarg.h> /* va_list va_start va_end */
23	#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */
24	#include <fcntl.h> /* open */
25	#include <pwd.h> /* getpwuid */
26	#include <limits.h> /* PATH_MAX */
27	#include <sys/stat.h> /* stat */
28	#include <sys/time.h> /* gettimeofday */
29	#include <sys/times.h> /* times */
30	#include "rdesktop.h"
31
32	char username[16];
33	char hostname[16];
34	char keymapname[16];
35	int keylayout;
36	int width;
37	int height;
38	BOOL bitmap_compression = True;
39	BOOL sendmotion = True;
40	BOOL orders = True;
41	BOOL licence = True;
42	BOOL encryption = True;
43	BOOL desktop_save = True;
44	BOOL fullscreen = False;
45
46	/* Display usage information */
47	static void
48	usage(char *program)
49	{
50	printf("Usage: %s [options] server\n", program);
51	printf(" -u: user name\n");
52	printf(" -d: domain\n");
53	printf(" -s: shell\n");
54	printf(" -c: working directory\n");
55	printf(" -p: password (autologon)\n");
56	printf(" -n: client hostname\n");
57	printf(" -k: keyboard layout\n");
58	printf(" -g: desktop geometry (WxH)\n");
59	printf(" -f: full-screen mode\n");
60	printf(" -b: force bitmap updates\n");
61	printf(" -e: disable encryption (French TS)\n");
62	printf(" -m: do not send motion events\n");
63	printf(" -l: do not request licence\n\n");
64	}
65
66	/* Client program */
67	int
68	main(int argc, char *argv[])
69	{
70	char fullhostname[64];
71	char domain[16];
72	char password[16];
73	char shell[32];
74	char directory[32];
75	char title[32];
76	struct passwd *pw;
77	char server, p;
78	uint32 flags;
79	int c;
80
81	printf("rdesktop: A Remote Desktop Protocol client.\n");
82	printf("Version " VERSION ". Copyright (C) 1999-2001 Matt Chapman.\n");
83	printf("See http://www.rdesktop.org/ for more information.\n\n");
84
85	flags = RDP_LOGON_NORMAL;
86	domain[0] = password[0] = shell[0] = directory[0] = 0;
87	strcpy(keymapname, "us");
88
89	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemlh?")) != -1)
90	{
91	switch (c)
92	{
93	case 'u':
94	STRNCPY(username, optarg, sizeof(username));
95	break;
96
97	case 'd':
98	STRNCPY(domain, optarg, sizeof(domain));
99	break;
100
101	case 's':
102	STRNCPY(shell, optarg, sizeof(shell));
103	break;
104
105	case 'c':
106	STRNCPY(directory, optarg, sizeof(directory));
107	break;
108
109	case 'p':
110	STRNCPY(password, optarg, sizeof(password));
111	flags \|= RDP_LOGON_AUTO;
112	break;
113
114	case 'n':
115	STRNCPY(hostname, optarg, sizeof(hostname));
116	break;
117
118	case 'k':
119	STRNCPY(keymapname, optarg, sizeof(keymapname));
120	break;
121
122	case 'g':
123	width = strtol(optarg, &p, 10);
124	if (*p == 'x')
125	height = strtol(p+1, NULL, 10);
126
127	if ((width == 0) \|\| (height == 0))
128	{
129	error("invalid geometry\n");
130	return 1;
131	}
132	break;
133
134	case 'f':
135	fullscreen = True;
136	break;
137
138	case 'b':
139	orders = False;
140	break;
141
142	case 'e':
143	encryption = False;
144	break;
145
146	case 'm':
147	sendmotion = False;
148	break;
149
150	case 'l':
151	licence = False;
152	break;
153
154	case 'h':
155	case '?':
156	default:
157	usage(argv[0]);
158	return 1;
159	}
160	}
161
162	if (argc - optind < 1)
163	{
164	usage(argv[0]);
165	return 1;
166	}
167
168	server = argv[optind];
169
170	if (username[0] == 0)
171	{
172	pw = getpwuid(getuid());
173	if ((pw == NULL) \|\| (pw->pw_name == NULL))
174	{
175	error("could not determine username, use -u\n");
176	return 1;
177	}
178
179	STRNCPY(username, pw->pw_name, sizeof(username));
180	}
181
182	if (hostname[0] == 0)
183	{
184	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
185	{
186	error("could not determine local hostname, use -n\n");
187	return 1;
188	}
189
190	p = strchr(fullhostname, '.');
191	if (p != NULL)
192	*p = 0;
193
194	STRNCPY(hostname, fullhostname, sizeof(hostname));
195	}
196
197	if (!strcmp(password, "-"))
198	{
199	p = getpass("Password: ");
200	if (p == NULL)
201	{
202	error("failed to read password\n");
203	return 0;
204	}
205	STRNCPY(password, p, sizeof(password));
206	}
207
208	if ((width == 0) \|\| (height == 0))
209	{
210	width = 800;
211	height = 600;
212	}
213
214	strcpy(title, "rdesktop - ");
215	strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
216
217	if (ui_create_window(title))
218	{
219	if (!rdp_connect(server, flags, domain, password, shell,
220	directory))
221	return 1;
222
223	printf("Connection successful.\n");
224	rdp_main_loop();
225	printf("Disconnecting...\n");
226	ui_destroy_window();
227	rdp_disconnect();
228	}
229
230	return 0;
231	}
232
233	/* Generate a 32-byte random for the secure transport code. */
234	void
235	generate_random(uint8 *random)
236	{
237	struct stat st;
238	struct tms tmsbuf;
239	uint32 r = (uint32 ) random;
240	int fd;
241
242	/* If we have a kernel random device, use it. */
243	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
244	\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
245	{
246	read(fd, random, 32);
247	close(fd);
248	return;
249	}
250
251	/* Otherwise use whatever entropy we can gather - ideas welcome. */
252	r[0] = (getpid()) \| (getppid() << 16);
253	r[1] = (getuid()) \| (getgid() << 16);
254	r[2] = times(&tmsbuf); /* system uptime (clocks) */
255	gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
256	stat("/tmp", &st);
257	r[5] = st.st_atime;
258	r[6] = st.st_mtime;
259	r[7] = st.st_ctime;
260	}
261
262	/* malloc; exit if out of memory */
263	void *
264	xmalloc(int size)
265	{
266	void *mem = malloc(size);
267	if (mem == NULL)
268	{
269	error("xmalloc %d\n", size);
270	exit(1);
271	}
272	return mem;
273	}
274
275	/* realloc; exit if out of memory */
276	void *
277	xrealloc(void *oldmem, int size)
278	{
279	void *mem = realloc(oldmem, size);
280	if (mem == NULL)
281	{
282	error("xrealloc %d\n", size);
283	exit(1);
284	}
285	return mem;
286	}
287
288	/* free */
289	void
290	xfree(void *mem)
291	{
292	free(mem);
293	}
294
295	/* report an error */
296	void
297	error(char *format, ...)
298	{
299	va_list ap;
300
301	fprintf(stderr, "ERROR: ");
302
303	va_start(ap, format);
304	vfprintf(stderr, format, ap);
305	va_end(ap);
306	}
307
308	/* report an unimplemented protocol feature */
309	void
310	unimpl(char *format, ...)
311	{
312	va_list ap;
313
314	fprintf(stderr, "NOT IMPLEMENTED: ");
315
316	va_start(ap, format);
317	vfprintf(stderr, format, ap);
318	va_end(ap);
319	}
320
321	/* produce a hex dump */
322	void
323	hexdump(unsigned char *p, unsigned int len)
324	{
325	unsigned char *line = p;
326	unsigned int thisline, offset = 0;
327	int i;
328
329	while (offset < len)
330	{
331	printf("%04x ", offset);
332	thisline = len - offset;
333	if (thisline > 16)
334	thisline = 16;
335
336	for (i = 0; i < thisline; i++)
337	printf("%02x ", line[i]);
338
339	for (; i < 16; i++)
340	printf(" ");
341
342	for (i = 0; i < thisline; i++)
343	printf("%c",
344	(line[i] >= 0x20
345	&& line[i] < 0x7f) ? line[i] : '.');
346
347	printf("\n");
348	offset += thisline;
349	line += thisline;
350	}
351	}
352
353	int
354	load_licence(unsigned char **data)
355	{
356	char path[PATH_MAX];
357	char *home;
358	struct stat st;
359	int fd;
360
361	home = getenv("HOME");
362	if (home == NULL)
363	return -1;
364
365	STRNCPY(path, home, sizeof(path));
366	strncat(path, "/.rdesktop/licence", sizeof(path)-strlen(path)-1);
367
368	fd = open(path, O_RDONLY);
369	if (fd == -1)
370	return -1;
371
372	if (fstat(fd, &st))
373	return -1;
374
375	*data = xmalloc(st.st_size);
376	return read(fd, *data, st.st_size);
377	}
378
379	void
380	save_licence(unsigned char *data, int length)
381	{
382	char path[PATH_MAX];
383	char *home;
384	int fd;
385
386	home = getenv("HOME");
387	if (home == NULL)
388	return;
389
390	STRNCPY(path, home, sizeof(path));
391	strncat(path, "/.rdesktop", sizeof(path)-strlen(path)-1);
392	mkdir(path, 0700);
393
394	strncat(path, "/licence", sizeof(path)-strlen(path)-1);
395
396	fd = open(path, O_WRONLY\|O_CREAT\|O_TRUNC, 0600);
397	if (fd == -1)
398	{
399	perror("open");
400	return;
401	}
402
403	write(fd, data, length);
404	close(fd);
405	}
406