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	matty	10	/*
2			rdesktop: A Remote Desktop Protocol client.
3			Entrypoint and utility functions
4	matty	30	Copyright (C) Matthew Chapman 1999-2001
5	matty	10
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	matty	24	#include <stdlib.h> /* malloc realloc free */
22	matty	30	#include <stdarg.h> /* va_list va_start va_end */
23	matty	24	#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */
24			#include <fcntl.h> /* open */
25			#include <pwd.h> /* getpwuid */
26	matthewc	39	#include <limits.h> /* PATH_MAX */
27	matty	24	#include <sys/stat.h> /* stat */
28			#include <sys/time.h> /* gettimeofday */
29			#include <sys/times.h> /* times */
30	matty	10	#include "rdesktop.h"
31
32			char username[16];
33			char hostname[16];
34	matthewc	38	char keymapname[16];
35			int keylayout;
36	matty	30	int width;
37			int height;
38	matty	28	BOOL bitmap_compression = True;
39	matty	29	BOOL sendmotion = True;
40	matty	10	BOOL orders = True;
41			BOOL licence = True;
42	matty	30	BOOL encryption = True;
43	matty	28	BOOL desktop_save = True;
44			BOOL fullscreen = False;
45	matty	10
46			/* Display usage information */
47	matty	25	static void
48			usage(char *program)
49	matty	10	{
50	matty	30	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	matthewc	38	printf(" -k: keyboard layout\n");
58	matty	30	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	matty	10	}
65
66			/* Client program */
67	matty	25	int
68			main(int argc, char *argv[])
69	matty	10	{
70	matty	30	char fullhostname[64];
71	matty	21	char domain[16];
72			char password[16];
73			char shell[32];
74			char directory[32];
75	matty	10	char title[32];
76	matty	30	struct passwd *pw;
77			char server, p;
78			uint32 flags;
79	matty	10	int c;
80
81	matty	30	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	matty	10
85	matty	21	flags = RDP_LOGON_NORMAL;
86			domain[0] = password[0] = shell[0] = directory[0] = 0;
87	matthewc	38	strcpy(keymapname, "us");
88	matty	21
89	matty	30	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemlh?")) != -1)
90	matty	10	{
91			switch (c)
92			{
93			case 'u':
94	matty	30	STRNCPY(username, optarg, sizeof(username));
95	matty	10	break;
96
97	matty	21	case 'd':
98	matty	30	STRNCPY(domain, optarg, sizeof(domain));
99	matty	21	break;
100
101			case 's':
102	matty	30	STRNCPY(shell, optarg, sizeof(shell));
103	matty	21	break;
104
105			case 'c':
106	matty	30	STRNCPY(directory, optarg, sizeof(directory));
107	matty	21	break;
108
109	matty	30	case 'p':
110			STRNCPY(password, optarg, sizeof(password));
111			flags \|= RDP_LOGON_AUTO;
112			break;
113
114	matty	10	case 'n':
115	matty	30	STRNCPY(hostname, optarg, sizeof(hostname));
116	matty	10	break;
117
118			case 'k':
119	matthewc	38	STRNCPY(keymapname, optarg, sizeof(keymapname));
120	matty	10	break;
121
122	matty	30	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	matty	10	break;
133
134	matty	30	case 'f':
135			fullscreen = True;
136			break;
137
138	matty	10	case 'b':
139			orders = False;
140			break;
141
142	matty	30	case 'e':
143			encryption = False;
144	matty	10	break;
145
146	matty	30	case 'm':
147			sendmotion = False;
148	matty	28	break;
149	matty	29
150	matty	30	case 'l':
151			licence = False;
152	matty	28	break;
153	matty	29
154	matty	28	case 'h':
155	matty	10	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	matty	30	error("could not determine username, use -u\n");
176	matty	10	return 1;
177			}
178
179	matty	30	STRNCPY(username, pw->pw_name, sizeof(username));
180	matty	10	}
181
182			if (hostname[0] == 0)
183			{
184	matty	30	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
185	matty	10	{
186	matty	30	error("could not determine local hostname, use -n\n");
187	matty	10	return 1;
188			}
189	matty	30
190			p = strchr(fullhostname, '.');
191			if (p != NULL)
192			*p = 0;
193
194			STRNCPY(hostname, fullhostname, sizeof(hostname));
195	matty	10	}
196
197	matty	30	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	matty	12	strcpy(title, "rdesktop - ");
215	matty	30	strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
216	matty	12
217	matty	10	if (ui_create_window(title))
218			{
219	matty	28	if (!rdp_connect(server, flags, domain, password, shell,
220			directory))
221			return 1;
222
223	matty	30	printf("Connection successful.\n");
224	matty	10	rdp_main_loop();
225	matty	33	printf("Disconnecting...\n");
226	matty	10	ui_destroy_window();
227	matthewc	38	rdp_disconnect();
228	matty	10	}
229
230			return 0;
231			}
232
233			/* Generate a 32-byte random for the secure transport code. */
234	matty	25	void
235			generate_random(uint8 *random)
236	matty	10	{
237			struct stat st;
238	matty	22	struct tms tmsbuf;
239	matty	24	uint32 r = (uint32 ) random;
240	matty	10	int fd;
241
242			/* If we have a kernel random device, use it. */
243	matty	30	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
244			\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
245	matty	10	{
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	matty	24	r[2] = times(&tmsbuf); /* system uptime (clocks) */
255			gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
256	matty	10	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	matty	25	void *
264			xmalloc(int size)
265	matty	10	{
266			void *mem = malloc(size);
267			if (mem == NULL)
268			{
269	matty	30	error("xmalloc %d\n", size);
270	matty	10	exit(1);
271			}
272			return mem;
273			}
274
275			/* realloc; exit if out of memory */
276	matty	25	void *
277			xrealloc(void *oldmem, int size)
278	matty	10	{
279			void *mem = realloc(oldmem, size);
280			if (mem == NULL)
281			{
282	matty	30	error("xrealloc %d\n", size);
283	matty	10	exit(1);
284			}
285			return mem;
286			}
287
288			/* free */
289	matty	25	void
290			xfree(void *mem)
291	matty	10	{
292			free(mem);
293			}
294
295	matty	30	/* report an error */
296	matty	25	void
297	matty	30	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	matty	25	hexdump(unsigned char *p, unsigned int len)
324	matty	10	{
325			unsigned char *line = p;
326			unsigned int thisline, offset = 0;
327			int i;
328
329			while (offset < len)
330			{
331	matty	30	printf("%04x ", offset);
332	matty	10	thisline = len - offset;
333			if (thisline > 16)
334			thisline = 16;
335
336			for (i = 0; i < thisline; i++)
337	matty	30	printf("%02x ", line[i]);
338	matty	10
339	matty	30	for (; i < 16; i++)
340			printf(" ");
341
342	matty	10	for (i = 0; i < thisline; i++)
343	matty	30	printf("%c",
344	matty	24	(line[i] >= 0x20
345			&& line[i] < 0x7f) ? line[i] : '.');
346	matty	10
347	matty	30	printf("\n");
348	matty	10	offset += thisline;
349			line += thisline;
350			}
351			}
352	matthewc	39
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