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1b3fef4f WJ |
1 | /* |
2 | * Copyright (c) 1985, 1988 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | * | |
33 | * @(#)ftpcmd.y 5.24 (Berkeley) 2/25/91 | |
34 | */ | |
35 | ||
36 | /* | |
37 | * Grammar for FTP commands. | |
38 | * See RFC 959. | |
39 | */ | |
40 | ||
41 | %{ | |
42 | ||
43 | #ifndef lint | |
44 | static char sccsid[] = "@(#)ftpcmd.y 5.24 (Berkeley) 2/25/91"; | |
45 | #endif /* not lint */ | |
46 | ||
47 | #include <sys/param.h> | |
48 | #include <sys/socket.h> | |
49 | #include <sys/stat.h> | |
50 | #include <netinet/in.h> | |
51 | #include <arpa/ftp.h> | |
52 | #include <signal.h> | |
53 | #include <setjmp.h> | |
54 | #include <syslog.h> | |
55 | #include <time.h> | |
56 | #include <pwd.h> | |
57 | #include <unistd.h> | |
58 | #include <stdio.h> | |
59 | #include <ctype.h> | |
60 | #include <stdlib.h> | |
61 | #include <string.h> | |
62 | ||
63 | extern struct sockaddr_in data_dest; | |
64 | extern int logged_in; | |
65 | extern struct passwd *pw; | |
66 | extern int guest; | |
67 | extern int logging; | |
68 | extern int type; | |
69 | extern int form; | |
70 | extern int debug; | |
71 | extern int timeout; | |
72 | extern int maxtimeout; | |
73 | extern int pdata; | |
74 | extern char hostname[], remotehost[]; | |
75 | extern char proctitle[]; | |
76 | extern char *globerr; | |
77 | extern int usedefault; | |
78 | extern int transflag; | |
79 | extern char tmpline[]; | |
80 | char **ftpglob(); | |
81 | ||
82 | off_t restart_point; | |
83 | ||
84 | static int cmd_type; | |
85 | static int cmd_form; | |
86 | static int cmd_bytesz; | |
87 | char cbuf[512]; | |
88 | char *fromname; | |
89 | ||
90 | %} | |
91 | ||
92 | %token | |
93 | A B C E F I | |
94 | L N P R S T | |
95 | ||
96 | SP CRLF COMMA STRING NUMBER | |
97 | ||
98 | USER PASS ACCT REIN QUIT PORT | |
99 | PASV TYPE STRU MODE RETR STOR | |
100 | APPE MLFL MAIL MSND MSOM MSAM | |
101 | MRSQ MRCP ALLO REST RNFR RNTO | |
102 | ABOR DELE CWD LIST NLST SITE | |
103 | STAT HELP NOOP MKD RMD PWD | |
104 | CDUP STOU SMNT SYST SIZE MDTM | |
105 | ||
106 | UMASK IDLE CHMOD | |
107 | ||
108 | LEXERR | |
109 | ||
110 | %start cmd_list | |
111 | ||
112 | %% | |
113 | ||
114 | cmd_list: /* empty */ | |
115 | | cmd_list cmd | |
116 | = { | |
117 | fromname = (char *) 0; | |
118 | restart_point = (off_t) 0; | |
119 | } | |
120 | | cmd_list rcmd | |
121 | ; | |
122 | ||
123 | cmd: USER SP username CRLF | |
124 | = { | |
125 | user((char *) $3); | |
126 | free((char *) $3); | |
127 | } | |
128 | | PASS SP password CRLF | |
129 | = { | |
130 | pass((char *) $3); | |
131 | free((char *) $3); | |
132 | } | |
133 | | PORT SP host_port CRLF | |
134 | = { | |
135 | usedefault = 0; | |
136 | if (pdata >= 0) { | |
137 | (void) close(pdata); | |
138 | pdata = -1; | |
139 | } | |
140 | reply(200, "PORT command successful."); | |
141 | } | |
142 | | PASV CRLF | |
143 | = { | |
144 | passive(); | |
145 | } | |
146 | | TYPE SP type_code CRLF | |
147 | = { | |
148 | switch (cmd_type) { | |
149 | ||
150 | case TYPE_A: | |
151 | if (cmd_form == FORM_N) { | |
152 | reply(200, "Type set to A."); | |
153 | type = cmd_type; | |
154 | form = cmd_form; | |
155 | } else | |
156 | reply(504, "Form must be N."); | |
157 | break; | |
158 | ||
159 | case TYPE_E: | |
160 | reply(504, "Type E not implemented."); | |
161 | break; | |
162 | ||
163 | case TYPE_I: | |
164 | reply(200, "Type set to I."); | |
165 | type = cmd_type; | |
166 | break; | |
167 | ||
168 | case TYPE_L: | |
169 | #if NBBY == 8 | |
170 | if (cmd_bytesz == 8) { | |
171 | reply(200, | |
172 | "Type set to L (byte size 8)."); | |
173 | type = cmd_type; | |
174 | } else | |
175 | reply(504, "Byte size must be 8."); | |
176 | #else /* NBBY == 8 */ | |
177 | UNIMPLEMENTED for NBBY != 8 | |
178 | #endif /* NBBY == 8 */ | |
179 | } | |
180 | } | |
181 | | STRU SP struct_code CRLF | |
182 | = { | |
183 | switch ($3) { | |
184 | ||
185 | case STRU_F: | |
186 | reply(200, "STRU F ok."); | |
187 | break; | |
188 | ||
189 | default: | |
190 | reply(504, "Unimplemented STRU type."); | |
191 | } | |
192 | } | |
193 | | MODE SP mode_code CRLF | |
194 | = { | |
195 | switch ($3) { | |
196 | ||
197 | case MODE_S: | |
198 | reply(200, "MODE S ok."); | |
199 | break; | |
200 | ||
201 | default: | |
202 | reply(502, "Unimplemented MODE type."); | |
203 | } | |
204 | } | |
205 | | ALLO SP NUMBER CRLF | |
206 | = { | |
207 | reply(202, "ALLO command ignored."); | |
208 | } | |
209 | | ALLO SP NUMBER SP R SP NUMBER CRLF | |
210 | = { | |
211 | reply(202, "ALLO command ignored."); | |
212 | } | |
213 | | RETR check_login SP pathname CRLF | |
214 | = { | |
215 | if ($2 && $4 != NULL) | |
216 | retrieve((char *) 0, (char *) $4); | |
217 | if ($4 != NULL) | |
218 | free((char *) $4); | |
219 | } | |
220 | | STOR check_login SP pathname CRLF | |
221 | = { | |
222 | if ($2 && $4 != NULL) | |
223 | store((char *) $4, "w", 0); | |
224 | if ($4 != NULL) | |
225 | free((char *) $4); | |
226 | } | |
227 | | APPE check_login SP pathname CRLF | |
228 | = { | |
229 | if ($2 && $4 != NULL) | |
230 | store((char *) $4, "a", 0); | |
231 | if ($4 != NULL) | |
232 | free((char *) $4); | |
233 | } | |
234 | | NLST check_login CRLF | |
235 | = { | |
236 | if ($2) | |
237 | send_file_list("."); | |
238 | } | |
239 | | NLST check_login SP STRING CRLF | |
240 | = { | |
241 | if ($2 && $4 != NULL) | |
242 | send_file_list((char *) $4); | |
243 | if ($4 != NULL) | |
244 | free((char *) $4); | |
245 | } | |
246 | | LIST check_login CRLF | |
247 | = { | |
248 | if ($2) | |
249 | retrieve("/bin/ls -lgA", ""); | |
250 | } | |
251 | | LIST check_login SP pathname CRLF | |
252 | = { | |
253 | if ($2 && $4 != NULL) | |
254 | retrieve("/bin/ls -lgA %s", (char *) $4); | |
255 | if ($4 != NULL) | |
256 | free((char *) $4); | |
257 | } | |
258 | | STAT check_login SP pathname CRLF | |
259 | = { | |
260 | if ($2 && $4 != NULL) | |
261 | statfilecmd((char *) $4); | |
262 | if ($4 != NULL) | |
263 | free((char *) $4); | |
264 | } | |
265 | | STAT CRLF | |
266 | = { | |
267 | statcmd(); | |
268 | } | |
269 | | DELE check_login SP pathname CRLF | |
270 | = { | |
271 | if ($2 && $4 != NULL) | |
272 | delete((char *) $4); | |
273 | if ($4 != NULL) | |
274 | free((char *) $4); | |
275 | } | |
276 | | RNTO SP pathname CRLF | |
277 | = { | |
278 | if (fromname) { | |
279 | renamecmd(fromname, (char *) $3); | |
280 | free(fromname); | |
281 | fromname = (char *) 0; | |
282 | } else { | |
283 | reply(503, "Bad sequence of commands."); | |
284 | } | |
285 | free((char *) $3); | |
286 | } | |
287 | | ABOR CRLF | |
288 | = { | |
289 | reply(225, "ABOR command successful."); | |
290 | } | |
291 | | CWD check_login CRLF | |
292 | = { | |
293 | if ($2) | |
294 | cwd(pw->pw_dir); | |
295 | } | |
296 | | CWD check_login SP pathname CRLF | |
297 | = { | |
298 | if ($2 && $4 != NULL) | |
299 | cwd((char *) $4); | |
300 | if ($4 != NULL) | |
301 | free((char *) $4); | |
302 | } | |
303 | | HELP CRLF | |
304 | = { | |
305 | help(cmdtab, (char *) 0); | |
306 | } | |
307 | | HELP SP STRING CRLF | |
308 | = { | |
309 | register char *cp = (char *)$3; | |
310 | ||
311 | if (strncasecmp(cp, "SITE", 4) == 0) { | |
312 | cp = (char *)$3 + 4; | |
313 | if (*cp == ' ') | |
314 | cp++; | |
315 | if (*cp) | |
316 | help(sitetab, cp); | |
317 | else | |
318 | help(sitetab, (char *) 0); | |
319 | } else | |
320 | help(cmdtab, (char *) $3); | |
321 | } | |
322 | | NOOP CRLF | |
323 | = { | |
324 | reply(200, "NOOP command successful."); | |
325 | } | |
326 | | MKD check_login SP pathname CRLF | |
327 | = { | |
328 | if ($2 && $4 != NULL) | |
329 | makedir((char *) $4); | |
330 | if ($4 != NULL) | |
331 | free((char *) $4); | |
332 | } | |
333 | | RMD check_login SP pathname CRLF | |
334 | = { | |
335 | if ($2 && $4 != NULL) | |
336 | removedir((char *) $4); | |
337 | if ($4 != NULL) | |
338 | free((char *) $4); | |
339 | } | |
340 | | PWD check_login CRLF | |
341 | = { | |
342 | if ($2) | |
343 | pwd(); | |
344 | } | |
345 | | CDUP check_login CRLF | |
346 | = { | |
347 | if ($2) | |
348 | cwd(".."); | |
349 | } | |
350 | | SITE SP HELP CRLF | |
351 | = { | |
352 | help(sitetab, (char *) 0); | |
353 | } | |
354 | | SITE SP HELP SP STRING CRLF | |
355 | = { | |
356 | help(sitetab, (char *) $5); | |
357 | } | |
358 | | SITE SP UMASK check_login CRLF | |
359 | = { | |
360 | int oldmask; | |
361 | ||
362 | if ($4) { | |
363 | oldmask = umask(0); | |
364 | (void) umask(oldmask); | |
365 | reply(200, "Current UMASK is %03o", oldmask); | |
366 | } | |
367 | } | |
368 | | SITE SP UMASK check_login SP octal_number CRLF | |
369 | = { | |
370 | int oldmask; | |
371 | ||
372 | if ($4) { | |
373 | if (($6 == -1) || ($6 > 0777)) { | |
374 | reply(501, "Bad UMASK value"); | |
375 | } else { | |
376 | oldmask = umask($6); | |
377 | reply(200, | |
378 | "UMASK set to %03o (was %03o)", | |
379 | $6, oldmask); | |
380 | } | |
381 | } | |
382 | } | |
383 | | SITE SP CHMOD check_login SP octal_number SP pathname CRLF | |
384 | = { | |
385 | if ($4 && ($8 != NULL)) { | |
386 | if ($6 > 0777) | |
387 | reply(501, | |
388 | "CHMOD: Mode value must be between 0 and 0777"); | |
389 | else if (chmod((char *) $8, $6) < 0) | |
390 | perror_reply(550, (char *) $8); | |
391 | else | |
392 | reply(200, "CHMOD command successful."); | |
393 | } | |
394 | if ($8 != NULL) | |
395 | free((char *) $8); | |
396 | } | |
397 | | SITE SP IDLE CRLF | |
398 | = { | |
399 | reply(200, | |
400 | "Current IDLE time limit is %d seconds; max %d", | |
401 | timeout, maxtimeout); | |
402 | } | |
403 | | SITE SP IDLE SP NUMBER CRLF | |
404 | = { | |
405 | if ($5 < 30 || $5 > maxtimeout) { | |
406 | reply(501, | |
407 | "Maximum IDLE time must be between 30 and %d seconds", | |
408 | maxtimeout); | |
409 | } else { | |
410 | timeout = $5; | |
411 | (void) alarm((unsigned) timeout); | |
412 | reply(200, | |
413 | "Maximum IDLE time set to %d seconds", | |
414 | timeout); | |
415 | } | |
416 | } | |
417 | | STOU check_login SP pathname CRLF | |
418 | = { | |
419 | if ($2 && $4 != NULL) | |
420 | store((char *) $4, "w", 1); | |
421 | if ($4 != NULL) | |
422 | free((char *) $4); | |
423 | } | |
424 | | SYST CRLF | |
425 | = { | |
426 | #ifdef unix | |
427 | #ifdef BSD | |
428 | reply(215, "UNIX Type: L%d Version: BSD-%d", | |
429 | NBBY, BSD); | |
430 | #else /* BSD */ | |
431 | reply(215, "UNIX Type: L%d", NBBY); | |
432 | #endif /* BSD */ | |
433 | #else /* unix */ | |
434 | reply(215, "UNKNOWN Type: L%d", NBBY); | |
435 | #endif /* unix */ | |
436 | } | |
437 | ||
438 | /* | |
439 | * SIZE is not in RFC959, but Postel has blessed it and | |
440 | * it will be in the updated RFC. | |
441 | * | |
442 | * Return size of file in a format suitable for | |
443 | * using with RESTART (we just count bytes). | |
444 | */ | |
445 | | SIZE check_login SP pathname CRLF | |
446 | = { | |
447 | if ($2 && $4 != NULL) | |
448 | sizecmd((char *) $4); | |
449 | if ($4 != NULL) | |
450 | free((char *) $4); | |
451 | } | |
452 | ||
453 | /* | |
454 | * MDTM is not in RFC959, but Postel has blessed it and | |
455 | * it will be in the updated RFC. | |
456 | * | |
457 | * Return modification time of file as an ISO 3307 | |
458 | * style time. E.g. YYYYMMDDHHMMSS or YYYYMMDDHHMMSS.xxx | |
459 | * where xxx is the fractional second (of any precision, | |
460 | * not necessarily 3 digits) | |
461 | */ | |
462 | | MDTM check_login SP pathname CRLF | |
463 | = { | |
464 | if ($2 && $4 != NULL) { | |
465 | struct stat stbuf; | |
466 | if (stat((char *) $4, &stbuf) < 0) | |
467 | perror_reply(550, "%s", (char *) $4); | |
468 | else if ((stbuf.st_mode&S_IFMT) != S_IFREG) { | |
469 | reply(550, "%s: not a plain file.", | |
470 | (char *) $4); | |
471 | } else { | |
472 | register struct tm *t; | |
473 | struct tm *gmtime(); | |
474 | t = gmtime(&stbuf.st_mtime); | |
475 | reply(213, | |
476 | "19%02d%02d%02d%02d%02d%02d", | |
477 | t->tm_year, t->tm_mon+1, t->tm_mday, | |
478 | t->tm_hour, t->tm_min, t->tm_sec); | |
479 | } | |
480 | } | |
481 | if ($4 != NULL) | |
482 | free((char *) $4); | |
483 | } | |
484 | | QUIT CRLF | |
485 | = { | |
486 | reply(221, "Goodbye."); | |
487 | dologout(0); | |
488 | } | |
489 | | error CRLF | |
490 | = { | |
491 | yyerrok; | |
492 | } | |
493 | ; | |
494 | rcmd: RNFR check_login SP pathname CRLF | |
495 | = { | |
496 | char *renamefrom(); | |
497 | ||
498 | restart_point = (off_t) 0; | |
499 | if ($2 && $4) { | |
500 | fromname = renamefrom((char *) $4); | |
501 | if (fromname == (char *) 0 && $4) { | |
502 | free((char *) $4); | |
503 | } | |
504 | } | |
505 | } | |
506 | | REST SP byte_size CRLF | |
507 | = { | |
508 | long atol(); | |
509 | ||
510 | fromname = (char *) 0; | |
511 | restart_point = $3; | |
512 | reply(350, "Restarting at %ld. %s", restart_point, | |
513 | "Send STORE or RETRIEVE to initiate transfer."); | |
514 | } | |
515 | ; | |
516 | ||
517 | username: STRING | |
518 | ; | |
519 | ||
520 | password: /* empty */ | |
521 | = { | |
522 | *(char **)&($$) = (char *)calloc(1, sizeof(char)); | |
523 | } | |
524 | | STRING | |
525 | ; | |
526 | ||
527 | byte_size: NUMBER | |
528 | ; | |
529 | ||
530 | host_port: NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA | |
531 | NUMBER COMMA NUMBER | |
532 | = { | |
533 | register char *a, *p; | |
534 | ||
535 | a = (char *)&data_dest.sin_addr; | |
536 | a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7; | |
537 | p = (char *)&data_dest.sin_port; | |
538 | p[0] = $9; p[1] = $11; | |
539 | data_dest.sin_family = AF_INET; | |
540 | } | |
541 | ; | |
542 | ||
543 | form_code: N | |
544 | = { | |
545 | $$ = FORM_N; | |
546 | } | |
547 | | T | |
548 | = { | |
549 | $$ = FORM_T; | |
550 | } | |
551 | | C | |
552 | = { | |
553 | $$ = FORM_C; | |
554 | } | |
555 | ; | |
556 | ||
557 | type_code: A | |
558 | = { | |
559 | cmd_type = TYPE_A; | |
560 | cmd_form = FORM_N; | |
561 | } | |
562 | | A SP form_code | |
563 | = { | |
564 | cmd_type = TYPE_A; | |
565 | cmd_form = $3; | |
566 | } | |
567 | | E | |
568 | = { | |
569 | cmd_type = TYPE_E; | |
570 | cmd_form = FORM_N; | |
571 | } | |
572 | | E SP form_code | |
573 | = { | |
574 | cmd_type = TYPE_E; | |
575 | cmd_form = $3; | |
576 | } | |
577 | | I | |
578 | = { | |
579 | cmd_type = TYPE_I; | |
580 | } | |
581 | | L | |
582 | = { | |
583 | cmd_type = TYPE_L; | |
584 | cmd_bytesz = NBBY; | |
585 | } | |
586 | | L SP byte_size | |
587 | = { | |
588 | cmd_type = TYPE_L; | |
589 | cmd_bytesz = $3; | |
590 | } | |
591 | /* this is for a bug in the BBN ftp */ | |
592 | | L byte_size | |
593 | = { | |
594 | cmd_type = TYPE_L; | |
595 | cmd_bytesz = $2; | |
596 | } | |
597 | ; | |
598 | ||
599 | struct_code: F | |
600 | = { | |
601 | $$ = STRU_F; | |
602 | } | |
603 | | R | |
604 | = { | |
605 | $$ = STRU_R; | |
606 | } | |
607 | | P | |
608 | = { | |
609 | $$ = STRU_P; | |
610 | } | |
611 | ; | |
612 | ||
613 | mode_code: S | |
614 | = { | |
615 | $$ = MODE_S; | |
616 | } | |
617 | | B | |
618 | = { | |
619 | $$ = MODE_B; | |
620 | } | |
621 | | C | |
622 | = { | |
623 | $$ = MODE_C; | |
624 | } | |
625 | ; | |
626 | ||
627 | pathname: pathstring | |
628 | = { | |
629 | /* | |
630 | * Problem: this production is used for all pathname | |
631 | * processing, but only gives a 550 error reply. | |
632 | * This is a valid reply in some cases but not in others. | |
633 | */ | |
634 | if (logged_in && $1 && strncmp((char *) $1, "~", 1) == 0) { | |
635 | *(char **)&($$) = *ftpglob((char *) $1); | |
636 | if (globerr != NULL) { | |
637 | reply(550, globerr); | |
638 | $$ = NULL; | |
639 | } | |
640 | free((char *) $1); | |
641 | } else | |
642 | $$ = $1; | |
643 | } | |
644 | ; | |
645 | ||
646 | pathstring: STRING | |
647 | ; | |
648 | ||
649 | octal_number: NUMBER | |
650 | = { | |
651 | register int ret, dec, multby, digit; | |
652 | ||
653 | /* | |
654 | * Convert a number that was read as decimal number | |
655 | * to what it would be if it had been read as octal. | |
656 | */ | |
657 | dec = $1; | |
658 | multby = 1; | |
659 | ret = 0; | |
660 | while (dec) { | |
661 | digit = dec%10; | |
662 | if (digit > 7) { | |
663 | ret = -1; | |
664 | break; | |
665 | } | |
666 | ret += digit * multby; | |
667 | multby *= 8; | |
668 | dec /= 10; | |
669 | } | |
670 | $$ = ret; | |
671 | } | |
672 | ; | |
673 | ||
674 | check_login: /* empty */ | |
675 | = { | |
676 | if (logged_in) | |
677 | $$ = 1; | |
678 | else { | |
679 | reply(530, "Please login with USER and PASS."); | |
680 | $$ = 0; | |
681 | } | |
682 | } | |
683 | ; | |
684 | ||
685 | %% | |
686 | ||
687 | extern jmp_buf errcatch; | |
688 | ||
689 | #define CMD 0 /* beginning of command */ | |
690 | #define ARGS 1 /* expect miscellaneous arguments */ | |
691 | #define STR1 2 /* expect SP followed by STRING */ | |
692 | #define STR2 3 /* expect STRING */ | |
693 | #define OSTR 4 /* optional SP then STRING */ | |
694 | #define ZSTR1 5 /* SP then optional STRING */ | |
695 | #define ZSTR2 6 /* optional STRING after SP */ | |
696 | #define SITECMD 7 /* SITE command */ | |
697 | #define NSTR 8 /* Number followed by a string */ | |
698 | ||
699 | struct tab { | |
700 | char *name; | |
701 | short token; | |
702 | short state; | |
703 | short implemented; /* 1 if command is implemented */ | |
704 | char *help; | |
705 | }; | |
706 | ||
707 | struct tab cmdtab[] = { /* In order defined in RFC 765 */ | |
708 | { "USER", USER, STR1, 1, "<sp> username" }, | |
709 | { "PASS", PASS, ZSTR1, 1, "<sp> password" }, | |
710 | { "ACCT", ACCT, STR1, 0, "(specify account)" }, | |
711 | { "SMNT", SMNT, ARGS, 0, "(structure mount)" }, | |
712 | { "REIN", REIN, ARGS, 0, "(reinitialize server state)" }, | |
713 | { "QUIT", QUIT, ARGS, 1, "(terminate service)", }, | |
714 | { "PORT", PORT, ARGS, 1, "<sp> b0, b1, b2, b3, b4" }, | |
715 | { "PASV", PASV, ARGS, 1, "(set server in passive mode)" }, | |
716 | { "TYPE", TYPE, ARGS, 1, "<sp> [ A | E | I | L ]" }, | |
717 | { "STRU", STRU, ARGS, 1, "(specify file structure)" }, | |
718 | { "MODE", MODE, ARGS, 1, "(specify transfer mode)" }, | |
719 | { "RETR", RETR, STR1, 1, "<sp> file-name" }, | |
720 | { "STOR", STOR, STR1, 1, "<sp> file-name" }, | |
721 | { "APPE", APPE, STR1, 1, "<sp> file-name" }, | |
722 | { "MLFL", MLFL, OSTR, 0, "(mail file)" }, | |
723 | { "MAIL", MAIL, OSTR, 0, "(mail to user)" }, | |
724 | { "MSND", MSND, OSTR, 0, "(mail send to terminal)" }, | |
725 | { "MSOM", MSOM, OSTR, 0, "(mail send to terminal or mailbox)" }, | |
726 | { "MSAM", MSAM, OSTR, 0, "(mail send to terminal and mailbox)" }, | |
727 | { "MRSQ", MRSQ, OSTR, 0, "(mail recipient scheme question)" }, | |
728 | { "MRCP", MRCP, STR1, 0, "(mail recipient)" }, | |
729 | { "ALLO", ALLO, ARGS, 1, "allocate storage (vacuously)" }, | |
730 | { "REST", REST, ARGS, 1, "(restart command)" }, | |
731 | { "RNFR", RNFR, STR1, 1, "<sp> file-name" }, | |
732 | { "RNTO", RNTO, STR1, 1, "<sp> file-name" }, | |
733 | { "ABOR", ABOR, ARGS, 1, "(abort operation)" }, | |
734 | { "DELE", DELE, STR1, 1, "<sp> file-name" }, | |
735 | { "CWD", CWD, OSTR, 1, "[ <sp> directory-name ]" }, | |
736 | { "XCWD", CWD, OSTR, 1, "[ <sp> directory-name ]" }, | |
737 | { "LIST", LIST, OSTR, 1, "[ <sp> path-name ]" }, | |
738 | { "NLST", NLST, OSTR, 1, "[ <sp> path-name ]" }, | |
739 | { "SITE", SITE, SITECMD, 1, "site-cmd [ <sp> arguments ]" }, | |
740 | { "SYST", SYST, ARGS, 1, "(get type of operating system)" }, | |
741 | { "STAT", STAT, OSTR, 1, "[ <sp> path-name ]" }, | |
742 | { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" }, | |
743 | { "NOOP", NOOP, ARGS, 1, "" }, | |
744 | { "MKD", MKD, STR1, 1, "<sp> path-name" }, | |
745 | { "XMKD", MKD, STR1, 1, "<sp> path-name" }, | |
746 | { "RMD", RMD, STR1, 1, "<sp> path-name" }, | |
747 | { "XRMD", RMD, STR1, 1, "<sp> path-name" }, | |
748 | { "PWD", PWD, ARGS, 1, "(return current directory)" }, | |
749 | { "XPWD", PWD, ARGS, 1, "(return current directory)" }, | |
750 | { "CDUP", CDUP, ARGS, 1, "(change to parent directory)" }, | |
751 | { "XCUP", CDUP, ARGS, 1, "(change to parent directory)" }, | |
752 | { "STOU", STOU, STR1, 1, "<sp> file-name" }, | |
753 | { "SIZE", SIZE, OSTR, 1, "<sp> path-name" }, | |
754 | { "MDTM", MDTM, OSTR, 1, "<sp> path-name" }, | |
755 | { NULL, 0, 0, 0, 0 } | |
756 | }; | |
757 | ||
758 | struct tab sitetab[] = { | |
759 | { "UMASK", UMASK, ARGS, 1, "[ <sp> umask ]" }, | |
760 | { "IDLE", IDLE, ARGS, 1, "[ <sp> maximum-idle-time ]" }, | |
761 | { "CHMOD", CHMOD, NSTR, 1, "<sp> mode <sp> file-name" }, | |
762 | { "HELP", HELP, OSTR, 1, "[ <sp> <string> ]" }, | |
763 | { NULL, 0, 0, 0, 0 } | |
764 | }; | |
765 | ||
766 | struct tab * | |
767 | lookup(p, cmd) | |
768 | register struct tab *p; | |
769 | char *cmd; | |
770 | { | |
771 | ||
772 | for (; p->name != NULL; p++) | |
773 | if (strcmp(cmd, p->name) == 0) | |
774 | return (p); | |
775 | return (0); | |
776 | } | |
777 | ||
778 | #include <arpa/telnet.h> | |
779 | ||
780 | /* | |
781 | * getline - a hacked up version of fgets to ignore TELNET escape codes. | |
782 | */ | |
783 | char * | |
784 | getline(s, n, iop) | |
785 | char *s; | |
786 | register FILE *iop; | |
787 | { | |
788 | register c; | |
789 | register char *cs; | |
790 | ||
791 | cs = s; | |
792 | /* tmpline may contain saved command from urgent mode interruption */ | |
793 | for (c = 0; tmpline[c] != '\0' && --n > 0; ++c) { | |
794 | *cs++ = tmpline[c]; | |
795 | if (tmpline[c] == '\n') { | |
796 | *cs++ = '\0'; | |
797 | if (debug) | |
798 | syslog(LOG_DEBUG, "command: %s", s); | |
799 | tmpline[0] = '\0'; | |
800 | return(s); | |
801 | } | |
802 | if (c == 0) | |
803 | tmpline[0] = '\0'; | |
804 | } | |
805 | while ((c = getc(iop)) != EOF) { | |
806 | c &= 0377; | |
807 | if (c == IAC) { | |
808 | if ((c = getc(iop)) != EOF) { | |
809 | c &= 0377; | |
810 | switch (c) { | |
811 | case WILL: | |
812 | case WONT: | |
813 | c = getc(iop); | |
814 | printf("%c%c%c", IAC, DONT, 0377&c); | |
815 | (void) fflush(stdout); | |
816 | continue; | |
817 | case DO: | |
818 | case DONT: | |
819 | c = getc(iop); | |
820 | printf("%c%c%c", IAC, WONT, 0377&c); | |
821 | (void) fflush(stdout); | |
822 | continue; | |
823 | case IAC: | |
824 | break; | |
825 | default: | |
826 | continue; /* ignore command */ | |
827 | } | |
828 | } | |
829 | } | |
830 | *cs++ = c; | |
831 | if (--n <= 0 || c == '\n') | |
832 | break; | |
833 | } | |
834 | if (c == EOF && cs == s) | |
835 | return (NULL); | |
836 | *cs++ = '\0'; | |
837 | if (debug) | |
838 | syslog(LOG_DEBUG, "command: %s", s); | |
839 | return (s); | |
840 | } | |
841 | ||
842 | static void | |
843 | toolong() | |
844 | { | |
845 | time_t now; | |
846 | ||
847 | reply(421, | |
848 | "Timeout (%d seconds): closing control connection.", timeout); | |
849 | (void) time(&now); | |
850 | if (logging) { | |
851 | syslog(LOG_INFO, | |
852 | "User %s timed out after %d seconds at %s", | |
853 | (pw ? pw -> pw_name : "unknown"), timeout, ctime(&now)); | |
854 | } | |
855 | dologout(1); | |
856 | } | |
857 | ||
858 | yylex() | |
859 | { | |
860 | static int cpos, state; | |
861 | register char *cp, *cp2; | |
862 | register struct tab *p; | |
863 | int n; | |
864 | char c, *copy(); | |
865 | ||
866 | for (;;) { | |
867 | switch (state) { | |
868 | ||
869 | case CMD: | |
870 | (void) signal(SIGALRM, toolong); | |
871 | (void) alarm((unsigned) timeout); | |
872 | if (getline(cbuf, sizeof(cbuf)-1, stdin) == NULL) { | |
873 | reply(221, "You could at least say goodbye."); | |
874 | dologout(0); | |
875 | } | |
876 | (void) alarm(0); | |
877 | #ifdef SETPROCTITLE | |
878 | if (strncasecmp(cbuf, "PASS", 4) != NULL) | |
879 | setproctitle("%s: %s", proctitle, cbuf); | |
880 | #endif /* SETPROCTITLE */ | |
881 | if ((cp = index(cbuf, '\r'))) { | |
882 | *cp++ = '\n'; | |
883 | *cp = '\0'; | |
884 | } | |
885 | if ((cp = strpbrk(cbuf, " \n"))) | |
886 | cpos = cp - cbuf; | |
887 | if (cpos == 0) | |
888 | cpos = 4; | |
889 | c = cbuf[cpos]; | |
890 | cbuf[cpos] = '\0'; | |
891 | upper(cbuf); | |
892 | p = lookup(cmdtab, cbuf); | |
893 | cbuf[cpos] = c; | |
894 | if (p != 0) { | |
895 | if (p->implemented == 0) { | |
896 | nack(p->name); | |
897 | longjmp(errcatch,0); | |
898 | /* NOTREACHED */ | |
899 | } | |
900 | state = p->state; | |
901 | *(char **)&yylval = p->name; | |
902 | return (p->token); | |
903 | } | |
904 | break; | |
905 | ||
906 | case SITECMD: | |
907 | if (cbuf[cpos] == ' ') { | |
908 | cpos++; | |
909 | return (SP); | |
910 | } | |
911 | cp = &cbuf[cpos]; | |
912 | if ((cp2 = strpbrk(cp, " \n"))) | |
913 | cpos = cp2 - cbuf; | |
914 | c = cbuf[cpos]; | |
915 | cbuf[cpos] = '\0'; | |
916 | upper(cp); | |
917 | p = lookup(sitetab, cp); | |
918 | cbuf[cpos] = c; | |
919 | if (p != 0) { | |
920 | if (p->implemented == 0) { | |
921 | state = CMD; | |
922 | nack(p->name); | |
923 | longjmp(errcatch,0); | |
924 | /* NOTREACHED */ | |
925 | } | |
926 | state = p->state; | |
927 | *(char **)&yylval = p->name; | |
928 | return (p->token); | |
929 | } | |
930 | state = CMD; | |
931 | break; | |
932 | ||
933 | case OSTR: | |
934 | if (cbuf[cpos] == '\n') { | |
935 | state = CMD; | |
936 | return (CRLF); | |
937 | } | |
938 | /* FALLTHROUGH */ | |
939 | ||
940 | case STR1: | |
941 | case ZSTR1: | |
942 | dostr1: | |
943 | if (cbuf[cpos] == ' ') { | |
944 | cpos++; | |
945 | state = state == OSTR ? STR2 : ++state; | |
946 | return (SP); | |
947 | } | |
948 | break; | |
949 | ||
950 | case ZSTR2: | |
951 | if (cbuf[cpos] == '\n') { | |
952 | state = CMD; | |
953 | return (CRLF); | |
954 | } | |
955 | /* FALLTHROUGH */ | |
956 | ||
957 | case STR2: | |
958 | cp = &cbuf[cpos]; | |
959 | n = strlen(cp); | |
960 | cpos += n - 1; | |
961 | /* | |
962 | * Make sure the string is nonempty and \n terminated. | |
963 | */ | |
964 | if (n > 1 && cbuf[cpos] == '\n') { | |
965 | cbuf[cpos] = '\0'; | |
966 | *(char **)&yylval = copy(cp); | |
967 | cbuf[cpos] = '\n'; | |
968 | state = ARGS; | |
969 | return (STRING); | |
970 | } | |
971 | break; | |
972 | ||
973 | case NSTR: | |
974 | if (cbuf[cpos] == ' ') { | |
975 | cpos++; | |
976 | return (SP); | |
977 | } | |
978 | if (isdigit(cbuf[cpos])) { | |
979 | cp = &cbuf[cpos]; | |
980 | while (isdigit(cbuf[++cpos])) | |
981 | ; | |
982 | c = cbuf[cpos]; | |
983 | cbuf[cpos] = '\0'; | |
984 | yylval = atoi(cp); | |
985 | cbuf[cpos] = c; | |
986 | state = STR1; | |
987 | return (NUMBER); | |
988 | } | |
989 | state = STR1; | |
990 | goto dostr1; | |
991 | ||
992 | case ARGS: | |
993 | if (isdigit(cbuf[cpos])) { | |
994 | cp = &cbuf[cpos]; | |
995 | while (isdigit(cbuf[++cpos])) | |
996 | ; | |
997 | c = cbuf[cpos]; | |
998 | cbuf[cpos] = '\0'; | |
999 | yylval = atoi(cp); | |
1000 | cbuf[cpos] = c; | |
1001 | return (NUMBER); | |
1002 | } | |
1003 | switch (cbuf[cpos++]) { | |
1004 | ||
1005 | case '\n': | |
1006 | state = CMD; | |
1007 | return (CRLF); | |
1008 | ||
1009 | case ' ': | |
1010 | return (SP); | |
1011 | ||
1012 | case ',': | |
1013 | return (COMMA); | |
1014 | ||
1015 | case 'A': | |
1016 | case 'a': | |
1017 | return (A); | |
1018 | ||
1019 | case 'B': | |
1020 | case 'b': | |
1021 | return (B); | |
1022 | ||
1023 | case 'C': | |
1024 | case 'c': | |
1025 | return (C); | |
1026 | ||
1027 | case 'E': | |
1028 | case 'e': | |
1029 | return (E); | |
1030 | ||
1031 | case 'F': | |
1032 | case 'f': | |
1033 | return (F); | |
1034 | ||
1035 | case 'I': | |
1036 | case 'i': | |
1037 | return (I); | |
1038 | ||
1039 | case 'L': | |
1040 | case 'l': | |
1041 | return (L); | |
1042 | ||
1043 | case 'N': | |
1044 | case 'n': | |
1045 | return (N); | |
1046 | ||
1047 | case 'P': | |
1048 | case 'p': | |
1049 | return (P); | |
1050 | ||
1051 | case 'R': | |
1052 | case 'r': | |
1053 | return (R); | |
1054 | ||
1055 | case 'S': | |
1056 | case 's': | |
1057 | return (S); | |
1058 | ||
1059 | case 'T': | |
1060 | case 't': | |
1061 | return (T); | |
1062 | ||
1063 | } | |
1064 | break; | |
1065 | ||
1066 | default: | |
1067 | fatal("Unknown state in scanner."); | |
1068 | } | |
1069 | yyerror((char *) 0); | |
1070 | state = CMD; | |
1071 | longjmp(errcatch,0); | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | upper(s) | |
1076 | register char *s; | |
1077 | { | |
1078 | while (*s != '\0') { | |
1079 | if (islower(*s)) | |
1080 | *s = toupper(*s); | |
1081 | s++; | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | char * | |
1086 | copy(s) | |
1087 | char *s; | |
1088 | { | |
1089 | char *p; | |
1090 | ||
1091 | p = malloc((unsigned) strlen(s) + 1); | |
1092 | if (p == NULL) | |
1093 | fatal("Ran out of memory."); | |
1094 | (void) strcpy(p, s); | |
1095 | return (p); | |
1096 | } | |
1097 | ||
1098 | help(ctab, s) | |
1099 | struct tab *ctab; | |
1100 | char *s; | |
1101 | { | |
1102 | register struct tab *c; | |
1103 | register int width, NCMDS; | |
1104 | char *type; | |
1105 | ||
1106 | if (ctab == sitetab) | |
1107 | type = "SITE "; | |
1108 | else | |
1109 | type = ""; | |
1110 | width = 0, NCMDS = 0; | |
1111 | for (c = ctab; c->name != NULL; c++) { | |
1112 | int len = strlen(c->name); | |
1113 | ||
1114 | if (len > width) | |
1115 | width = len; | |
1116 | NCMDS++; | |
1117 | } | |
1118 | width = (width + 8) &~ 7; | |
1119 | if (s == 0) { | |
1120 | register int i, j, w; | |
1121 | int columns, lines; | |
1122 | ||
1123 | lreply(214, "The following %scommands are recognized %s.", | |
1124 | type, "(* =>'s unimplemented)"); | |
1125 | columns = 76 / width; | |
1126 | if (columns == 0) | |
1127 | columns = 1; | |
1128 | lines = (NCMDS + columns - 1) / columns; | |
1129 | for (i = 0; i < lines; i++) { | |
1130 | printf(" "); | |
1131 | for (j = 0; j < columns; j++) { | |
1132 | c = ctab + j * lines + i; | |
1133 | printf("%s%c", c->name, | |
1134 | c->implemented ? ' ' : '*'); | |
1135 | if (c + lines >= &ctab[NCMDS]) | |
1136 | break; | |
1137 | w = strlen(c->name) + 1; | |
1138 | while (w < width) { | |
1139 | putchar(' '); | |
1140 | w++; | |
1141 | } | |
1142 | } | |
1143 | printf("\r\n"); | |
1144 | } | |
1145 | (void) fflush(stdout); | |
1146 | reply(214, "Direct comments to ftp-bugs@%s.", hostname); | |
1147 | return; | |
1148 | } | |
1149 | upper(s); | |
1150 | c = lookup(ctab, s); | |
1151 | if (c == (struct tab *)0) { | |
1152 | reply(502, "Unknown command %s.", s); | |
1153 | return; | |
1154 | } | |
1155 | if (c->implemented) | |
1156 | reply(214, "Syntax: %s%s %s", type, c->name, c->help); | |
1157 | else | |
1158 | reply(214, "%s%-*s\t%s; unimplemented.", type, width, | |
1159 | c->name, c->help); | |
1160 | } | |
1161 | ||
1162 | sizecmd(filename) | |
1163 | char *filename; | |
1164 | { | |
1165 | switch (type) { | |
1166 | case TYPE_L: | |
1167 | case TYPE_I: { | |
1168 | struct stat stbuf; | |
1169 | if (stat(filename, &stbuf) < 0 || | |
1170 | (stbuf.st_mode&S_IFMT) != S_IFREG) | |
1171 | reply(550, "%s: not a plain file.", filename); | |
1172 | else | |
1173 | reply(213, "%lu", stbuf.st_size); | |
1174 | break;} | |
1175 | case TYPE_A: { | |
1176 | FILE *fin; | |
1177 | register int c; | |
1178 | register long count; | |
1179 | struct stat stbuf; | |
1180 | fin = fopen(filename, "r"); | |
1181 | if (fin == NULL) { | |
1182 | perror_reply(550, filename); | |
1183 | return; | |
1184 | } | |
1185 | if (fstat(fileno(fin), &stbuf) < 0 || | |
1186 | (stbuf.st_mode&S_IFMT) != S_IFREG) { | |
1187 | reply(550, "%s: not a plain file.", filename); | |
1188 | (void) fclose(fin); | |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | count = 0; | |
1193 | while((c=getc(fin)) != EOF) { | |
1194 | if (c == '\n') /* will get expanded to \r\n */ | |
1195 | count++; | |
1196 | count++; | |
1197 | } | |
1198 | (void) fclose(fin); | |
1199 | ||
1200 | reply(213, "%ld", count); | |
1201 | break;} | |
1202 | default: | |
1203 | reply(504, "SIZE not implemented for Type %c.", "?AEIL"[type]); | |
1204 | } | |
1205 | } |