trunk/rdesktop/rdesktop.c

/*
   rdesktop: A Remote Desktop Protocol client.
   Entrypoint and utility functions
   Copyright (C) Matthew Chapman 1999-2002

   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 <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 <termios.h>            /* tcgetattr tcsetattr */
#include <sys/stat.h>           /* stat */
#include <sys/time.h>           /* gettimeofday */
#include <sys/times.h>          /* times */
#include "rdesktop.h"

#ifdef EGD_SOCKET
#include <sys/socket.h>         /* socket connect */
#include <sys/un.h>             /* sockaddr_un */
#endif

#ifdef WITH_OPENSSL
#include <openssl/md5.h>
#else
#include "crypto/md5.h"
#endif

char title[32] = "";
char username[16];
char hostname[16];
char keymapname[16];
int keylayout = 0x409;          /* Defaults to US keyboard layout */
int width = 800;
int height = 600;
int tcp_port_rdp = TCP_PORT_RDP;
BOOL bitmap_compression = True;
BOOL sendmotion = True;
BOOL orders = True;
BOOL encryption = True;
BOOL desktop_save = True;
BOOL fullscreen = False;
BOOL grab_keyboard = True;

/* Display usage information */
static void
usage(char *program)
{
        fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
        fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
        fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");

        fprintf(stderr, "Usage: %s [options] server\n", program);
        fprintf(stderr, "   -u: user name\n");
        fprintf(stderr, "   -d: domain\n");
        fprintf(stderr, "   -s: shell\n");
        fprintf(stderr, "   -c: working directory\n");
        fprintf(stderr, "   -p: password (- to prompt)\n");
        fprintf(stderr, "   -n: client hostname\n");
        fprintf(stderr, "   -k: keyboard layout on terminal server (us,sv,gr etc.)\n");
        fprintf(stderr, "   -g: desktop geometry (WxH)\n");
        fprintf(stderr, "   -f: full-screen mode\n");
        fprintf(stderr, "   -b: force bitmap updates\n");
        fprintf(stderr, "   -e: disable encryption (French TS)\n");
        fprintf(stderr, "   -m: do not send motion events\n");
        fprintf(stderr, "   -t: rdp tcp port\n");
        fprintf(stderr, "   -K: keep window manager key bindings\n");
        fprintf(stderr, "   -w: window title\n");
}

static BOOL
read_password(char *password, int size)
{
        struct termios tios;
        BOOL ret = False;
        int istty = 0;
        char *p;

        if (tcgetattr(STDIN_FILENO, &tios) == 0)
        {
                fprintf(stderr, "Password: ");
                tios.c_lflag &= ~ECHO;
                tcsetattr(STDIN_FILENO, TCSANOW, &tios);
                istty = 1;
        }

        if (fgets(password, size, stdin) != NULL)
        {
                ret = True;

                /* strip final newline */
                p = strchr(password, '\n');
                if (p != NULL)
                        *p = 0;
        }

        if (istty)
        {
                tios.c_lflag |= ECHO;
                tcsetattr(STDIN_FILENO, TCSANOW, &tios);
                fprintf(stderr, "\n");
        }

        return ret;
}

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

        flags = RDP_LOGON_NORMAL;
        prompt_password = False;
        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:t:fbemKw:h?")) != -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':
                                if ((optarg[0] == '-') && (optarg[1] == 0))
                                {
                                        prompt_password = True;
                                        break;
                                }

                                STRNCPY(password, optarg, sizeof(password));
                                flags |= RDP_LOGON_AUTO;

                                /* try to overwrite argument so it won't appear in ps */
                                p = optarg;
                                while (*p)
                                        *(p++) = 'X';
                                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 't':
                                tcp_port_rdp = strtol(optarg, NULL, 10);
                                break;

                        case 'K':
                                grab_keyboard = False;
                                break;

                        case 'w':
                                strncpy(title, optarg, sizeof(title));
                                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 (prompt_password && read_password(password, sizeof(password)))
                flags |= RDP_LOGON_AUTO;

        if (title[0] == 0)
        {
                strcpy(title, "rdesktop - ");
                strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
        }

        if (!ui_init())
                return 1;

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

        DEBUG(("Connection successful.\n"));
        memset(password, 0, sizeof(password));

        if (ui_create_window())
        {
                rdp_main_loop();
                ui_destroy_window();
        }

        DEBUG(("Disconnecting...\n"));
        rdp_disconnect();
        ui_deinit();
        return 0;
}

#ifdef EGD_SOCKET
/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
static BOOL
generate_random_egd(uint8 * buf)
{
        struct sockaddr_un addr;
        BOOL ret = False;
        int fd;

        fd = socket(AF_UNIX, SOCK_STREAM, 0);
        if (fd == -1)
                return False;

        addr.sun_family = AF_UNIX;
        memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
        if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1)
                goto err;

        /* PRNGD and EGD use a simple communications protocol */
        buf[0] = 1;  /* Non-blocking (similar to /dev/urandom) */
        buf[1] = 32; /* Number of requested random bytes */
        if (write(fd, buf, 2) != 2)
                goto err;

        if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */
                goto err;

        if (read(fd, buf, 32) != 32)
                goto err;

        ret = True;

err:
        close(fd);
        return ret;
}
#endif

/* Generate a 32-byte random for the secure transport code. */
void
generate_random(uint8 * random)
{
        struct stat st;
        struct tms tmsbuf;
        MD5_CTX md5;
        uint32 *r;
        int fd, n;

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

#ifdef EGD_SOCKET
        /* As a second preference use an EGD */
        if (generate_random_egd(random))
                return;
#endif

        /* Otherwise use whatever entropy we can gather - ideas welcome. */
        r = (uint32 *)random;
        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;

        /* Hash both halves with MD5 to obscure possible patterns */
        MD5_Init(&md5);
        MD5_Update(&md5, random, 16); 
        MD5_Final(random, &md5);
        MD5_Update(&md5, random+16, 16);
        MD5_Final(random+16, &md5);
}

/* 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;
        }
}

#ifdef SAVE_LICENCE
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);
}
#endif
1	/*
2	rdesktop: A Remote Desktop Protocol client.
3	Entrypoint and utility functions
4	Copyright (C) Matthew Chapman 1999-2002
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 <stdarg.h> /* va_list va_start va_end */
22	#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */
23	#include <fcntl.h> /* open */
24	#include <pwd.h> /* getpwuid */
25	#include <limits.h> /* PATH_MAX */
26	#include <termios.h> /* tcgetattr tcsetattr */
27	#include <sys/stat.h> /* stat */
28	#include <sys/time.h> /* gettimeofday */
29	#include <sys/times.h> /* times */
30	#include "rdesktop.h"
31
32	#ifdef EGD_SOCKET
33	#include <sys/socket.h> /* socket connect */
34	#include <sys/un.h> /* sockaddr_un */
35	#endif
36
37	#ifdef WITH_OPENSSL
38	#include <openssl/md5.h>
39	#else
40	#include "crypto/md5.h"
41	#endif
42
43	char title[32] = "";
44	char username[16];
45	char hostname[16];
46	char keymapname[16];
47	int keylayout = 0x409; /* Defaults to US keyboard layout */
48	int width = 800;
49	int height = 600;
50	int tcp_port_rdp = TCP_PORT_RDP;
51	BOOL bitmap_compression = True;
52	BOOL sendmotion = True;
53	BOOL orders = True;
54	BOOL encryption = True;
55	BOOL desktop_save = True;
56	BOOL fullscreen = False;
57	BOOL grab_keyboard = True;
58
59	/* Display usage information */
60	static void
61	usage(char *program)
62	{
63	fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
64	fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
65	fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");
66
67	fprintf(stderr, "Usage: %s [options] server\n", program);
68	fprintf(stderr, " -u: user name\n");
69	fprintf(stderr, " -d: domain\n");
70	fprintf(stderr, " -s: shell\n");
71	fprintf(stderr, " -c: working directory\n");
72	fprintf(stderr, " -p: password (- to prompt)\n");
73	fprintf(stderr, " -n: client hostname\n");
74	fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr etc.)\n");
75	fprintf(stderr, " -g: desktop geometry (WxH)\n");
76	fprintf(stderr, " -f: full-screen mode\n");
77	fprintf(stderr, " -b: force bitmap updates\n");
78	fprintf(stderr, " -e: disable encryption (French TS)\n");
79	fprintf(stderr, " -m: do not send motion events\n");
80	fprintf(stderr, " -t: rdp tcp port\n");
81	fprintf(stderr, " -K: keep window manager key bindings\n");
82	fprintf(stderr, " -w: window title\n");
83	}
84
85	static BOOL
86	read_password(char *password, int size)
87	{
88	struct termios tios;
89	BOOL ret = False;
90	int istty = 0;
91	char *p;
92
93	if (tcgetattr(STDIN_FILENO, &tios) == 0)
94	{
95	fprintf(stderr, "Password: ");
96	tios.c_lflag &= ~ECHO;
97	tcsetattr(STDIN_FILENO, TCSANOW, &tios);
98	istty = 1;
99	}
100
101	if (fgets(password, size, stdin) != NULL)
102	{
103	ret = True;
104
105	/* strip final newline */
106	p = strchr(password, '\n');
107	if (p != NULL)
108	*p = 0;
109	}
110
111	if (istty)
112	{
113	tios.c_lflag \|= ECHO;
114	tcsetattr(STDIN_FILENO, TCSANOW, &tios);
115	fprintf(stderr, "\n");
116	}
117
118	return ret;
119	}
120
121	/* Client program */
122	int
123	main(int argc, char *argv[])
124	{
125	char fullhostname[64];
126	char domain[16];
127	char password[16];
128	char shell[32];
129	char directory[32];
130	BOOL prompt_password;
131	struct passwd *pw;
132	char server, p;
133	uint32 flags;
134	int c;
135
136	flags = RDP_LOGON_NORMAL;
137	prompt_password = False;
138	domain[0] = password[0] = shell[0] = directory[0] = 0;
139	strcpy(keymapname, "us");
140
141	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:t:fbemKw:h?")) != -1)
142	{
143	switch (c)
144	{
145	case 'u':
146	STRNCPY(username, optarg, sizeof(username));
147	break;
148
149	case 'd':
150	STRNCPY(domain, optarg, sizeof(domain));
151	break;
152
153	case 's':
154	STRNCPY(shell, optarg, sizeof(shell));
155	break;
156
157	case 'c':
158	STRNCPY(directory, optarg, sizeof(directory));
159	break;
160
161	case 'p':
162	if ((optarg[0] == '-') && (optarg[1] == 0))
163	{
164	prompt_password = True;
165	break;
166	}
167
168	STRNCPY(password, optarg, sizeof(password));
169	flags \|= RDP_LOGON_AUTO;
170
171	/* try to overwrite argument so it won't appear in ps */
172	p = optarg;
173	while (*p)
174	*(p++) = 'X';
175	break;
176
177	case 'n':
178	STRNCPY(hostname, optarg, sizeof(hostname));
179	break;
180
181	case 'k':
182	STRNCPY(keymapname, optarg, sizeof(keymapname));
183	break;
184
185	case 'g':
186	width = strtol(optarg, &p, 10);
187	if (*p == 'x')
188	height = strtol(p + 1, NULL, 10);
189
190	if ((width == 0) \|\| (height == 0))
191	{
192	error("invalid geometry\n");
193	return 1;
194	}
195	break;
196
197	case 'f':
198	fullscreen = True;
199	break;
200
201	case 'b':
202	orders = False;
203	break;
204
205	case 'e':
206	encryption = False;
207	break;
208
209	case 'm':
210	sendmotion = False;
211	break;
212
213	case 't':
214	tcp_port_rdp = strtol(optarg, NULL, 10);
215	break;
216
217	case 'K':
218	grab_keyboard = False;
219	break;
220
221	case 'w':
222	strncpy(title, optarg, sizeof(title));
223	break;
224
225	case 'h':
226	case '?':
227	default:
228	usage(argv[0]);
229	return 1;
230	}
231	}
232
233	if (argc - optind < 1)
234	{
235	usage(argv[0]);
236	return 1;
237	}
238
239	server = argv[optind];
240
241	if (username[0] == 0)
242	{
243	pw = getpwuid(getuid());
244	if ((pw == NULL) \|\| (pw->pw_name == NULL))
245	{
246	error("could not determine username, use -u\n");
247	return 1;
248	}
249
250	STRNCPY(username, pw->pw_name, sizeof(username));
251	}
252
253	if (hostname[0] == 0)
254	{
255	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
256	{
257	error("could not determine local hostname, use -n\n");
258	return 1;
259	}
260
261	p = strchr(fullhostname, '.');
262	if (p != NULL)
263	*p = 0;
264
265	STRNCPY(hostname, fullhostname, sizeof(hostname));
266	}
267
268	if (prompt_password && read_password(password, sizeof(password)))
269	flags \|= RDP_LOGON_AUTO;
270
271	if (title[0] == 0)
272	{
273	strcpy(title, "rdesktop - ");
274	strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
275	}
276
277	if (!ui_init())
278	return 1;
279
280	if (!rdp_connect(server, flags, domain, password, shell, directory))
281	return 1;
282
283	DEBUG(("Connection successful.\n"));
284	memset(password, 0, sizeof(password));
285
286	if (ui_create_window())
287	{
288	rdp_main_loop();
289	ui_destroy_window();
290	}
291
292	DEBUG(("Disconnecting...\n"));
293	rdp_disconnect();
294	ui_deinit();
295	return 0;
296	}
297
298	#ifdef EGD_SOCKET
299	/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
300	static BOOL
301	generate_random_egd(uint8 * buf)
302	{
303	struct sockaddr_un addr;
304	BOOL ret = False;
305	int fd;
306
307	fd = socket(AF_UNIX, SOCK_STREAM, 0);
308	if (fd == -1)
309	return False;
310
311	addr.sun_family = AF_UNIX;
312	memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
313	if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1)
314	goto err;
315
316	/* PRNGD and EGD use a simple communications protocol */
317	buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */
318	buf[1] = 32; /* Number of requested random bytes */
319	if (write(fd, buf, 2) != 2)
320	goto err;
321
322	if ((read(fd, buf, 1) != 1) \|\| (buf[0] == 0)) /* Available? */
323	goto err;
324
325	if (read(fd, buf, 32) != 32)
326	goto err;
327
328	ret = True;
329
330	err:
331	close(fd);
332	return ret;
333	}
334	#endif
335
336	/* Generate a 32-byte random for the secure transport code. */
337	void
338	generate_random(uint8 * random)
339	{
340	struct stat st;
341	struct tms tmsbuf;
342	MD5_CTX md5;
343	uint32 *r;
344	int fd, n;
345
346	/* If we have a kernel random device, try that first */
347	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
348	\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
349	{
350	n = read(fd, random, 32);
351	close(fd);
352	if (n == 32)
353	return;
354	}
355
356	#ifdef EGD_SOCKET
357	/* As a second preference use an EGD */
358	if (generate_random_egd(random))
359	return;
360	#endif
361
362	/* Otherwise use whatever entropy we can gather - ideas welcome. */
363	r = (uint32 *)random;
364	r[0] = (getpid()) \| (getppid() << 16);
365	r[1] = (getuid()) \| (getgid() << 16);
366	r[2] = times(&tmsbuf); /* system uptime (clocks) */
367	gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
368	stat("/tmp", &st);
369	r[5] = st.st_atime;
370	r[6] = st.st_mtime;
371	r[7] = st.st_ctime;
372
373	/* Hash both halves with MD5 to obscure possible patterns */
374	MD5_Init(&md5);
375	MD5_Update(&md5, random, 16);
376	MD5_Final(random, &md5);
377	MD5_Update(&md5, random+16, 16);
378	MD5_Final(random+16, &md5);
379	}
380
381	/* malloc; exit if out of memory */
382	void *
383	xmalloc(int size)
384	{
385	void *mem = malloc(size);
386	if (mem == NULL)
387	{
388	error("xmalloc %d\n", size);
389	exit(1);
390	}
391	return mem;
392	}
393
394	/* realloc; exit if out of memory */
395	void *
396	xrealloc(void *oldmem, int size)
397	{
398	void *mem = realloc(oldmem, size);
399	if (mem == NULL)
400	{
401	error("xrealloc %d\n", size);
402	exit(1);
403	}
404	return mem;
405	}
406
407	/* free */
408	void
409	xfree(void *mem)
410	{
411	free(mem);
412	}
413
414	/* report an error */
415	void
416	error(char *format, ...)
417	{
418	va_list ap;
419
420	fprintf(stderr, "ERROR: ");
421
422	va_start(ap, format);
423	vfprintf(stderr, format, ap);
424	va_end(ap);
425	}
426
427	/* report an unimplemented protocol feature */
428	void
429	unimpl(char *format, ...)
430	{
431	va_list ap;
432
433	fprintf(stderr, "NOT IMPLEMENTED: ");
434
435	va_start(ap, format);
436	vfprintf(stderr, format, ap);
437	va_end(ap);
438	}
439
440	/* produce a hex dump */
441	void
442	hexdump(unsigned char *p, unsigned int len)
443	{
444	unsigned char *line = p;
445	unsigned int thisline, offset = 0;
446	int i;
447
448	while (offset < len)
449	{
450	printf("%04x ", offset);
451	thisline = len - offset;
452	if (thisline > 16)
453	thisline = 16;
454
455	for (i = 0; i < thisline; i++)
456	printf("%02x ", line[i]);
457
458	for (; i < 16; i++)
459	printf(" ");
460
461	for (i = 0; i < thisline; i++)
462	printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
463
464	printf("\n");
465	offset += thisline;
466	line += thisline;
467	}
468	}
469
470	#ifdef SAVE_LICENCE
471	int
472	load_licence(unsigned char **data)
473	{
474	char path[PATH_MAX];
475	char *home;
476	struct stat st;
477	int fd;
478
479	home = getenv("HOME");
480	if (home == NULL)
481	return -1;
482
483	STRNCPY(path, home, sizeof(path));
484	strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1);
485
486	fd = open(path, O_RDONLY);
487	if (fd == -1)
488	return -1;
489
490	if (fstat(fd, &st))
491	return -1;
492
493	*data = xmalloc(st.st_size);
494	return read(fd, *data, st.st_size);
495	}
496
497	void
498	save_licence(unsigned char *data, int length)
499	{
500	char path[PATH_MAX];
501	char *home;
502	int fd;
503
504	home = getenv("HOME");
505	if (home == NULL)
506	return;
507
508	STRNCPY(path, home, sizeof(path));
509	strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1);
510	mkdir(path, 0700);
511
512	strncat(path, "/licence", sizeof(path) - strlen(path) - 1);
513
514	fd = open(path, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
515	if (fd == -1)
516	{
517	perror("open");
518	return;
519	}
520
521	write(fd, data, length);
522	close(fd);
523	}
524	#endif