1 |
/* |
2 |
rdesktop: A Remote Desktop Protocol client. |
3 |
Entrypoint and utility functions |
4 |
Copyright (C) Matthew Chapman 1999-2003 |
5 |
|
6 |
This program is free software; you can redistribute it and/or modify |
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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 |
|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#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 <termios.h> /* tcgetattr tcsetattr */ |
26 |
#include <sys/stat.h> /* stat */ |
27 |
#include <sys/time.h> /* gettimeofday */ |
28 |
#include <sys/times.h> /* times */ |
29 |
#include "rdesktop.h" |
30 |
|
31 |
#ifdef EGD_SOCKET |
32 |
#include <sys/socket.h> /* socket connect */ |
33 |
#include <sys/un.h> /* sockaddr_un */ |
34 |
#endif |
35 |
|
36 |
#ifdef WITH_OPENSSL |
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#include <openssl/md5.h> |
38 |
#else |
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#include "crypto/md5.h" |
40 |
#endif |
41 |
|
42 |
char title[32] = ""; |
43 |
char username[16]; |
44 |
char hostname[16]; |
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char keymapname[16]; |
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int keylayout = 0x409; /* Defaults to US keyboard layout */ |
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int width = 800; /* If width or height are reset to zero, the geometry will |
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be fetched from _NET_WORKAREA */ |
49 |
int height = 600; |
50 |
int tcp_port_rdp = TCP_PORT_RDP; |
51 |
int server_bpp = 8; |
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BOOL bitmap_compression = True; |
53 |
BOOL sendmotion = True; |
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BOOL orders = True; |
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BOOL encryption = True; |
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BOOL desktop_save = True; |
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BOOL fullscreen = False; |
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BOOL grab_keyboard = True; |
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BOOL hide_decorations = False; |
60 |
extern BOOL owncolmap; |
61 |
|
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/* Display usage information */ |
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static void |
64 |
usage(char *program) |
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{ |
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fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n"); |
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fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2003 Matt Chapman.\n"); |
68 |
fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n"); |
69 |
|
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fprintf(stderr, "Usage: %s [options] server[:port]\n", program); |
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fprintf(stderr, " -u: user name\n"); |
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fprintf(stderr, " -d: domain\n"); |
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fprintf(stderr, " -s: shell\n"); |
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fprintf(stderr, " -c: working directory\n"); |
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fprintf(stderr, " -p: password (- to prompt)\n"); |
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fprintf(stderr, " -n: client hostname\n"); |
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fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n"); |
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fprintf(stderr, " -g: desktop geometry (WxH)\n"); |
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fprintf(stderr, " -f: full-screen mode\n"); |
80 |
fprintf(stderr, " -b: force bitmap updates\n"); |
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fprintf(stderr, " -e: disable encryption (French TS)\n"); |
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fprintf(stderr, " -m: do not send motion events\n"); |
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fprintf(stderr, " -C: use private colour map\n"); |
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fprintf(stderr, " -K: keep window manager key bindings\n"); |
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fprintf(stderr, " -T: window title\n"); |
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fprintf(stderr, " -D: hide window manager decorations\n"); |
87 |
fprintf(stderr, " -a: server bpp\n"); |
88 |
} |
89 |
|
90 |
static BOOL |
91 |
read_password(char *password, int size) |
92 |
{ |
93 |
struct termios tios; |
94 |
BOOL ret = False; |
95 |
int istty = 0; |
96 |
char *p; |
97 |
|
98 |
if (tcgetattr(STDIN_FILENO, &tios) == 0) |
99 |
{ |
100 |
fprintf(stderr, "Password: "); |
101 |
tios.c_lflag &= ~ECHO; |
102 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
103 |
istty = 1; |
104 |
} |
105 |
|
106 |
if (fgets(password, size, stdin) != NULL) |
107 |
{ |
108 |
ret = True; |
109 |
|
110 |
/* strip final newline */ |
111 |
p = strchr(password, '\n'); |
112 |
if (p != NULL) |
113 |
*p = 0; |
114 |
} |
115 |
|
116 |
if (istty) |
117 |
{ |
118 |
tios.c_lflag |= ECHO; |
119 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
120 |
fprintf(stderr, "\n"); |
121 |
} |
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|
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return ret; |
124 |
} |
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|
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/* Client program */ |
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int |
128 |
main(int argc, char *argv[]) |
129 |
{ |
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char server[64]; |
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char fullhostname[64]; |
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char domain[16]; |
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char password[16]; |
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char shell[128]; |
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char directory[32]; |
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BOOL prompt_password; |
137 |
struct passwd *pw; |
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uint32 flags; |
139 |
char *p; |
140 |
int c; |
141 |
int username_option = 0; |
142 |
|
143 |
flags = RDP_LOGON_NORMAL; |
144 |
prompt_password = False; |
145 |
domain[0] = password[0] = shell[0] = directory[0] = 0; |
146 |
strcpy(keymapname, "en-us"); |
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|
148 |
while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:a:fbemCKT:Dh?")) != -1) |
149 |
{ |
150 |
switch (c) |
151 |
{ |
152 |
case 'u': |
153 |
STRNCPY(username, optarg, sizeof(username)); |
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username_option = 1; |
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break; |
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|
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case 'd': |
158 |
STRNCPY(domain, optarg, sizeof(domain)); |
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break; |
160 |
|
161 |
case 's': |
162 |
STRNCPY(shell, optarg, sizeof(shell)); |
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break; |
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|
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case 'c': |
166 |
STRNCPY(directory, optarg, sizeof(directory)); |
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break; |
168 |
|
169 |
case 'p': |
170 |
if ((optarg[0] == '-') && (optarg[1] == 0)) |
171 |
{ |
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prompt_password = True; |
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break; |
174 |
} |
175 |
|
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STRNCPY(password, optarg, sizeof(password)); |
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flags |= RDP_LOGON_AUTO; |
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|
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/* try to overwrite argument so it won't appear in ps */ |
180 |
p = optarg; |
181 |
while (*p) |
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*(p++) = 'X'; |
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break; |
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|
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case 'n': |
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STRNCPY(hostname, optarg, sizeof(hostname)); |
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break; |
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|
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case 'k': |
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STRNCPY(keymapname, optarg, sizeof(keymapname)); |
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break; |
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|
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case 'g': |
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if (!strcmp(optarg, "workarea")) |
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{ |
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width = height = 0; |
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break; |
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} |
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|
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width = strtol(optarg, &p, 10); |
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if (*p == 'x') |
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height = strtol(p + 1, NULL, 10); |
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|
204 |
if ((width == 0) || (height == 0)) |
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{ |
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error("invalid geometry\n"); |
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return 1; |
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} |
209 |
break; |
210 |
|
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case 'f': |
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fullscreen = True; |
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break; |
214 |
|
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case 'b': |
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orders = False; |
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break; |
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|
219 |
case 'e': |
220 |
encryption = False; |
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break; |
222 |
|
223 |
case 'm': |
224 |
sendmotion = False; |
225 |
break; |
226 |
|
227 |
case 'C': |
228 |
owncolmap = True; |
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break; |
230 |
|
231 |
case 'K': |
232 |
grab_keyboard = False; |
233 |
break; |
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|
235 |
case 'T': |
236 |
STRNCPY(title, optarg, sizeof(title)); |
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break; |
238 |
|
239 |
case 'D': |
240 |
hide_decorations = True; |
241 |
break; |
242 |
|
243 |
case 'a': |
244 |
server_bpp = strtol(optarg, NULL, 10); |
245 |
if (server_bpp != 8 && server_bpp != 16 && server_bpp != 15 |
246 |
&& server_bpp != 24) |
247 |
{ |
248 |
error("invalid server bpp\n"); |
249 |
return 1; |
250 |
} |
251 |
break; |
252 |
|
253 |
case 'h': |
254 |
case '?': |
255 |
default: |
256 |
usage(argv[0]); |
257 |
return 1; |
258 |
} |
259 |
} |
260 |
|
261 |
if (argc - optind < 1) |
262 |
{ |
263 |
usage(argv[0]); |
264 |
return 1; |
265 |
} |
266 |
|
267 |
STRNCPY(server, argv[optind], sizeof(server)); |
268 |
p = strchr(server, ':'); |
269 |
if (p != NULL) |
270 |
{ |
271 |
tcp_port_rdp = strtol(p + 1, NULL, 10); |
272 |
*p = 0; |
273 |
} |
274 |
|
275 |
if (!username_option) |
276 |
{ |
277 |
pw = getpwuid(getuid()); |
278 |
if ((pw == NULL) || (pw->pw_name == NULL)) |
279 |
{ |
280 |
error("could not determine username, use -u\n"); |
281 |
return 1; |
282 |
} |
283 |
|
284 |
STRNCPY(username, pw->pw_name, sizeof(username)); |
285 |
} |
286 |
|
287 |
if (hostname[0] == 0) |
288 |
{ |
289 |
if (gethostname(fullhostname, sizeof(fullhostname)) == -1) |
290 |
{ |
291 |
error("could not determine local hostname, use -n\n"); |
292 |
return 1; |
293 |
} |
294 |
|
295 |
p = strchr(fullhostname, '.'); |
296 |
if (p != NULL) |
297 |
*p = 0; |
298 |
|
299 |
STRNCPY(hostname, fullhostname, sizeof(hostname)); |
300 |
} |
301 |
|
302 |
if (prompt_password && read_password(password, sizeof(password))) |
303 |
flags |= RDP_LOGON_AUTO; |
304 |
|
305 |
if (title[0] == 0) |
306 |
{ |
307 |
strcpy(title, "rdesktop - "); |
308 |
strncat(title, server, sizeof(title) - sizeof("rdesktop - ")); |
309 |
} |
310 |
|
311 |
if (!ui_init()) |
312 |
return 1; |
313 |
|
314 |
if (!rdp_connect(server, flags, domain, password, shell, directory)) |
315 |
return 1; |
316 |
|
317 |
DEBUG(("Connection successful.\n")); |
318 |
memset(password, 0, sizeof(password)); |
319 |
|
320 |
if (ui_create_window()) |
321 |
{ |
322 |
rdp_main_loop(); |
323 |
ui_destroy_window(); |
324 |
} |
325 |
|
326 |
DEBUG(("Disconnecting...\n")); |
327 |
rdp_disconnect(); |
328 |
ui_deinit(); |
329 |
return 0; |
330 |
} |
331 |
|
332 |
#ifdef EGD_SOCKET |
333 |
/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */ |
334 |
static BOOL |
335 |
generate_random_egd(uint8 * buf) |
336 |
{ |
337 |
struct sockaddr_un addr; |
338 |
BOOL ret = False; |
339 |
int fd; |
340 |
|
341 |
fd = socket(AF_UNIX, SOCK_STREAM, 0); |
342 |
if (fd == -1) |
343 |
return False; |
344 |
|
345 |
addr.sun_family = AF_UNIX; |
346 |
memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET)); |
347 |
if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) |
348 |
goto err; |
349 |
|
350 |
/* PRNGD and EGD use a simple communications protocol */ |
351 |
buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */ |
352 |
buf[1] = 32; /* Number of requested random bytes */ |
353 |
if (write(fd, buf, 2) != 2) |
354 |
goto err; |
355 |
|
356 |
if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */ |
357 |
goto err; |
358 |
|
359 |
if (read(fd, buf, 32) != 32) |
360 |
goto err; |
361 |
|
362 |
ret = True; |
363 |
|
364 |
err: |
365 |
close(fd); |
366 |
return ret; |
367 |
} |
368 |
#endif |
369 |
|
370 |
/* Generate a 32-byte random for the secure transport code. */ |
371 |
void |
372 |
generate_random(uint8 * random) |
373 |
{ |
374 |
struct stat st; |
375 |
struct tms tmsbuf; |
376 |
MD5_CTX md5; |
377 |
uint32 *r; |
378 |
int fd, n; |
379 |
|
380 |
/* If we have a kernel random device, try that first */ |
381 |
if (((fd = open("/dev/urandom", O_RDONLY)) != -1) |
382 |
|| ((fd = open("/dev/random", O_RDONLY)) != -1)) |
383 |
{ |
384 |
n = read(fd, random, 32); |
385 |
close(fd); |
386 |
if (n == 32) |
387 |
return; |
388 |
} |
389 |
|
390 |
#ifdef EGD_SOCKET |
391 |
/* As a second preference use an EGD */ |
392 |
if (generate_random_egd(random)) |
393 |
return; |
394 |
#endif |
395 |
|
396 |
/* Otherwise use whatever entropy we can gather - ideas welcome. */ |
397 |
r = (uint32 *) random; |
398 |
r[0] = (getpid()) | (getppid() << 16); |
399 |
r[1] = (getuid()) | (getgid() << 16); |
400 |
r[2] = times(&tmsbuf); /* system uptime (clocks) */ |
401 |
gettimeofday((struct timeval *) &r[3], NULL); /* sec and usec */ |
402 |
stat("/tmp", &st); |
403 |
r[5] = st.st_atime; |
404 |
r[6] = st.st_mtime; |
405 |
r[7] = st.st_ctime; |
406 |
|
407 |
/* Hash both halves with MD5 to obscure possible patterns */ |
408 |
MD5_Init(&md5); |
409 |
MD5_Update(&md5, random, 16); |
410 |
MD5_Final(random, &md5); |
411 |
MD5_Update(&md5, random + 16, 16); |
412 |
MD5_Final(random + 16, &md5); |
413 |
} |
414 |
|
415 |
/* malloc; exit if out of memory */ |
416 |
void * |
417 |
xmalloc(int size) |
418 |
{ |
419 |
void *mem = malloc(size); |
420 |
if (mem == NULL) |
421 |
{ |
422 |
error("xmalloc %d\n", size); |
423 |
exit(1); |
424 |
} |
425 |
return mem; |
426 |
} |
427 |
|
428 |
/* realloc; exit if out of memory */ |
429 |
void * |
430 |
xrealloc(void *oldmem, int size) |
431 |
{ |
432 |
void *mem = realloc(oldmem, size); |
433 |
if (mem == NULL) |
434 |
{ |
435 |
error("xrealloc %d\n", size); |
436 |
exit(1); |
437 |
} |
438 |
return mem; |
439 |
} |
440 |
|
441 |
/* free */ |
442 |
void |
443 |
xfree(void *mem) |
444 |
{ |
445 |
free(mem); |
446 |
} |
447 |
|
448 |
/* report an error */ |
449 |
void |
450 |
error(char *format, ...) |
451 |
{ |
452 |
va_list ap; |
453 |
|
454 |
fprintf(stderr, "ERROR: "); |
455 |
|
456 |
va_start(ap, format); |
457 |
vfprintf(stderr, format, ap); |
458 |
va_end(ap); |
459 |
} |
460 |
|
461 |
/* report a warning */ |
462 |
void |
463 |
warning(char *format, ...) |
464 |
{ |
465 |
va_list ap; |
466 |
|
467 |
fprintf(stderr, "WARNING: "); |
468 |
|
469 |
va_start(ap, format); |
470 |
vfprintf(stderr, format, ap); |
471 |
va_end(ap); |
472 |
} |
473 |
|
474 |
/* report an unimplemented protocol feature */ |
475 |
void |
476 |
unimpl(char *format, ...) |
477 |
{ |
478 |
va_list ap; |
479 |
|
480 |
fprintf(stderr, "NOT IMPLEMENTED: "); |
481 |
|
482 |
va_start(ap, format); |
483 |
vfprintf(stderr, format, ap); |
484 |
va_end(ap); |
485 |
} |
486 |
|
487 |
/* produce a hex dump */ |
488 |
void |
489 |
hexdump(unsigned char *p, unsigned int len) |
490 |
{ |
491 |
unsigned char *line = p; |
492 |
unsigned int thisline, offset = 0; |
493 |
int i; |
494 |
|
495 |
while (offset < len) |
496 |
{ |
497 |
printf("%04x ", offset); |
498 |
thisline = len - offset; |
499 |
if (thisline > 16) |
500 |
thisline = 16; |
501 |
|
502 |
for (i = 0; i < thisline; i++) |
503 |
printf("%02x ", line[i]); |
504 |
|
505 |
for (; i < 16; i++) |
506 |
printf(" "); |
507 |
|
508 |
for (i = 0; i < thisline; i++) |
509 |
printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.'); |
510 |
|
511 |
printf("\n"); |
512 |
offset += thisline; |
513 |
line += thisline; |
514 |
} |
515 |
} |