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1 | /* | |
2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | #include "includes.h" | |
25 | RCSID("$OpenBSD: sftp-server.c,v 1.6 2000/09/07 20:27:53 deraadt Exp $"); | |
26 | ||
27 | #include "ssh.h" | |
28 | #include "buffer.h" | |
29 | #include "bufaux.h" | |
30 | #include "getput.h" | |
31 | #include "xmalloc.h" | |
32 | ||
33 | /* version */ | |
34 | #define SSH_FILEXFER_VERSION 2 | |
35 | ||
36 | /* client to server */ | |
37 | #define SSH_FXP_INIT 1 | |
38 | #define SSH_FXP_OPEN 3 | |
39 | #define SSH_FXP_CLOSE 4 | |
40 | #define SSH_FXP_READ 5 | |
41 | #define SSH_FXP_WRITE 6 | |
42 | #define SSH_FXP_LSTAT 7 | |
43 | #define SSH_FXP_FSTAT 8 | |
44 | #define SSH_FXP_SETSTAT 9 | |
45 | #define SSH_FXP_FSETSTAT 10 | |
46 | #define SSH_FXP_OPENDIR 11 | |
47 | #define SSH_FXP_READDIR 12 | |
48 | #define SSH_FXP_REMOVE 13 | |
49 | #define SSH_FXP_MKDIR 14 | |
50 | #define SSH_FXP_RMDIR 15 | |
51 | #define SSH_FXP_REALPATH 16 | |
52 | #define SSH_FXP_STAT 17 | |
53 | #define SSH_FXP_RENAME 18 | |
54 | ||
55 | /* server to client */ | |
56 | #define SSH_FXP_VERSION 2 | |
57 | #define SSH_FXP_STATUS 101 | |
58 | #define SSH_FXP_HANDLE 102 | |
59 | #define SSH_FXP_DATA 103 | |
60 | #define SSH_FXP_NAME 104 | |
61 | #define SSH_FXP_ATTRS 105 | |
62 | ||
63 | /* portable open modes */ | |
64 | #define SSH_FXF_READ 0x01 | |
65 | #define SSH_FXF_WRITE 0x02 | |
66 | #define SSH_FXF_APPEND 0x04 | |
67 | #define SSH_FXF_CREAT 0x08 | |
68 | #define SSH_FXF_TRUNC 0x10 | |
69 | #define SSH_FXF_EXCL 0x20 | |
70 | ||
71 | /* attributes */ | |
72 | #define SSH_FXA_HAVE_SIZE 0x01 | |
73 | #define SSH_FXA_HAVE_UGID 0x02 | |
74 | #define SSH_FXA_HAVE_PERM 0x04 | |
75 | #define SSH_FXA_HAVE_TIME 0x08 | |
76 | ||
77 | /* status messages */ | |
78 | #define SSH_FX_OK 0x00 | |
79 | #define SSH_FX_EOF 0x01 | |
80 | #define SSH_FX_NO_SUCH_FILE 0x02 | |
81 | #define SSH_FX_PERMISSION_DENIED 0x03 | |
82 | #define SSH_FX_FAILURE 0x04 | |
83 | #define SSH_FX_BAD_MESSAGE 0x05 | |
84 | #define SSH_FX_NO_CONNECTION 0x06 | |
85 | #define SSH_FX_CONNECTION_LOST 0x07 | |
86 | ||
87 | ||
88 | /* helper */ | |
89 | #define get_int() buffer_get_int(&iqueue); | |
90 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
91 | #define TRACE log | |
92 | ||
93 | /* input and output queue */ | |
94 | Buffer iqueue; | |
95 | Buffer oqueue; | |
96 | ||
97 | /* portable attibutes, etc. */ | |
98 | ||
99 | typedef struct Attrib Attrib; | |
100 | typedef struct Stat Stat; | |
101 | ||
102 | struct Attrib | |
103 | { | |
104 | u_int32_t flags; | |
105 | u_int32_t size_high; | |
106 | u_int32_t size_low; | |
107 | u_int64_t size; | |
108 | u_int32_t uid; | |
109 | u_int32_t gid; | |
110 | u_int32_t perm; | |
111 | u_int32_t atime; | |
112 | u_int32_t mtime; | |
113 | }; | |
114 | ||
115 | struct Stat | |
116 | { | |
117 | char *name; | |
118 | char *long_name; | |
119 | Attrib attrib; | |
120 | }; | |
121 | ||
122 | int | |
123 | errno_to_portable(int unixerrno) | |
124 | { | |
125 | int ret = 0; | |
126 | switch (unixerrno) { | |
127 | case 0: | |
128 | ret = SSH_FX_OK; | |
129 | break; | |
130 | case ENOENT: | |
131 | case ENOTDIR: | |
132 | case EBADF: | |
133 | case ELOOP: | |
134 | ret = SSH_FX_NO_SUCH_FILE; | |
135 | break; | |
136 | case EPERM: | |
137 | case EACCES: | |
138 | case EFAULT: | |
139 | ret = SSH_FX_PERMISSION_DENIED; | |
140 | break; | |
141 | case ENAMETOOLONG: | |
142 | case EINVAL: | |
143 | ret = SSH_FX_BAD_MESSAGE; | |
144 | break; | |
145 | default: | |
146 | ret = SSH_FX_FAILURE; | |
147 | break; | |
148 | } | |
149 | return ret; | |
150 | } | |
151 | ||
152 | int | |
153 | flags_from_portable(int pflags) | |
154 | { | |
155 | int flags = 0; | |
156 | if (pflags & SSH_FXF_READ && | |
157 | pflags & SSH_FXF_WRITE) { | |
158 | flags = O_RDWR; | |
159 | } else if (pflags & SSH_FXF_READ) { | |
160 | flags = O_RDONLY; | |
161 | } else if (pflags & SSH_FXF_WRITE) { | |
162 | flags = O_WRONLY; | |
163 | } | |
164 | if (pflags & SSH_FXF_CREAT) | |
165 | flags |= O_CREAT; | |
166 | if (pflags & SSH_FXF_TRUNC) | |
167 | flags |= O_TRUNC; | |
168 | if (pflags & SSH_FXF_EXCL) | |
169 | flags |= O_EXCL; | |
170 | return flags; | |
171 | } | |
172 | ||
173 | void | |
174 | attrib_clear(Attrib *a) | |
175 | { | |
176 | a->flags = 0; | |
177 | a->size_low = 0; | |
178 | a->size_high = 0; | |
179 | a->size = 0; | |
180 | a->uid = 0; | |
181 | a->gid = 0; | |
182 | a->perm = 0; | |
183 | a->atime = 0; | |
184 | a->mtime = 0; | |
185 | } | |
186 | ||
187 | Attrib * | |
188 | decode_attrib(Buffer *b) | |
189 | { | |
190 | static Attrib a; | |
191 | attrib_clear(&a); | |
192 | a.flags = buffer_get_int(b); | |
193 | if (a.flags & SSH_FXA_HAVE_SIZE) { | |
194 | a.size_high = buffer_get_int(b); | |
195 | a.size_low = buffer_get_int(b); | |
196 | a.size = (((u_int64_t) a.size_high) << 32) + a.size_low; | |
197 | } | |
198 | if (a.flags & SSH_FXA_HAVE_UGID) { | |
199 | a.uid = buffer_get_int(b); | |
200 | a.gid = buffer_get_int(b); | |
201 | } | |
202 | if (a.flags & SSH_FXA_HAVE_PERM) { | |
203 | a.perm = buffer_get_int(b); | |
204 | } | |
205 | if (a.flags & SSH_FXA_HAVE_TIME) { | |
206 | a.atime = buffer_get_int(b); | |
207 | a.mtime = buffer_get_int(b); | |
208 | } | |
209 | return &a; | |
210 | } | |
211 | ||
212 | void | |
213 | encode_attrib(Buffer *b, Attrib *a) | |
214 | { | |
215 | buffer_put_int(b, a->flags); | |
216 | if (a->flags & SSH_FXA_HAVE_SIZE) { | |
217 | buffer_put_int(b, a->size_high); | |
218 | buffer_put_int(b, a->size_low); | |
219 | } | |
220 | if (a->flags & SSH_FXA_HAVE_UGID) { | |
221 | buffer_put_int(b, a->uid); | |
222 | buffer_put_int(b, a->gid); | |
223 | } | |
224 | if (a->flags & SSH_FXA_HAVE_PERM) { | |
225 | buffer_put_int(b, a->perm); | |
226 | } | |
227 | if (a->flags & SSH_FXA_HAVE_TIME) { | |
228 | buffer_put_int(b, a->atime); | |
229 | buffer_put_int(b, a->mtime); | |
230 | } | |
231 | } | |
232 | ||
233 | Attrib * | |
234 | stat_to_attrib(struct stat *st) | |
235 | { | |
236 | static Attrib a; | |
237 | attrib_clear(&a); | |
238 | a.flags = 0; | |
239 | a.flags |= SSH_FXA_HAVE_SIZE; | |
240 | a.size = st->st_size; | |
241 | a.size_low = a.size; | |
242 | a.size_high = (u_int32_t) (a.size >> 32); | |
243 | a.flags |= SSH_FXA_HAVE_UGID; | |
244 | a.uid = st->st_uid; | |
245 | a.gid = st->st_gid; | |
246 | a.flags |= SSH_FXA_HAVE_PERM; | |
247 | a.perm = st->st_mode; | |
248 | a.flags |= SSH_FXA_HAVE_TIME; | |
249 | a.atime = st->st_atime; | |
250 | a.mtime = st->st_mtime; | |
251 | return &a; | |
252 | } | |
253 | ||
254 | Attrib * | |
255 | get_attrib(void) | |
256 | { | |
257 | return decode_attrib(&iqueue); | |
258 | } | |
259 | ||
260 | /* handle handles */ | |
261 | ||
262 | typedef struct Handle Handle; | |
263 | struct Handle { | |
264 | int use; | |
265 | DIR *dirp; | |
266 | int fd; | |
267 | char *name; | |
268 | }; | |
269 | enum { | |
270 | HANDLE_UNUSED, | |
271 | HANDLE_DIR, | |
272 | HANDLE_FILE | |
273 | }; | |
274 | Handle handles[100]; | |
275 | ||
276 | void | |
277 | handle_init(void) | |
278 | { | |
279 | int i; | |
280 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) | |
281 | handles[i].use = HANDLE_UNUSED; | |
282 | } | |
283 | ||
284 | int | |
285 | handle_new(int use, char *name, int fd, DIR *dirp) | |
286 | { | |
287 | int i; | |
288 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) { | |
289 | if (handles[i].use == HANDLE_UNUSED) { | |
290 | handles[i].use = use; | |
291 | handles[i].dirp = dirp; | |
292 | handles[i].fd = fd; | |
293 | handles[i].name = name; | |
294 | return i; | |
295 | } | |
296 | } | |
297 | return -1; | |
298 | } | |
299 | ||
300 | int | |
301 | handle_is_ok(int i, int type) | |
302 | { | |
303 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && handles[i].use == type; | |
304 | } | |
305 | ||
306 | int | |
307 | handle_to_string(int handle, char **stringp, int *hlenp) | |
308 | { | |
309 | char buf[1024]; | |
310 | if (stringp == NULL || hlenp == NULL) | |
311 | return -1; | |
312 | snprintf(buf, sizeof buf, "%d", handle); | |
313 | *stringp = xstrdup(buf); | |
314 | *hlenp = strlen(*stringp); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | int | |
319 | handle_from_string(char *handle, u_int hlen) | |
320 | { | |
321 | /* XXX OVERFLOW ? */ | |
322 | char *ep; | |
323 | long lval = strtol(handle, &ep, 10); | |
324 | int val = lval; | |
325 | if (*ep != '\0') | |
326 | return -1; | |
327 | if (handle_is_ok(val, HANDLE_FILE) || | |
328 | handle_is_ok(val, HANDLE_DIR)) | |
329 | return val; | |
330 | return -1; | |
331 | } | |
332 | ||
333 | char * | |
334 | handle_to_name(int handle) | |
335 | { | |
336 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
337 | handle_is_ok(handle, HANDLE_FILE)) | |
338 | return handles[handle].name; | |
339 | return NULL; | |
340 | } | |
341 | ||
342 | DIR * | |
343 | handle_to_dir(int handle) | |
344 | { | |
345 | if (handle_is_ok(handle, HANDLE_DIR)) | |
346 | return handles[handle].dirp; | |
347 | return NULL; | |
348 | } | |
349 | ||
350 | int | |
351 | handle_to_fd(int handle) | |
352 | { | |
353 | if (handle_is_ok(handle, HANDLE_FILE)) | |
354 | return handles[handle].fd; | |
355 | return -1; | |
356 | } | |
357 | ||
358 | int | |
359 | handle_close(int handle) | |
360 | { | |
361 | int ret = -1; | |
362 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
363 | ret = close(handles[handle].fd); | |
364 | handles[handle].use = HANDLE_UNUSED; | |
365 | } else if (handle_is_ok(handle, HANDLE_DIR)) { | |
366 | ret = closedir(handles[handle].dirp); | |
367 | handles[handle].use = HANDLE_UNUSED; | |
368 | } else { | |
369 | errno = ENOENT; | |
370 | } | |
371 | return ret; | |
372 | } | |
373 | ||
374 | int | |
375 | get_handle(void) | |
376 | { | |
377 | char *handle; | |
378 | int val; | |
379 | u_int hlen; | |
380 | handle = get_string(&hlen); | |
381 | val = handle_from_string(handle, hlen); | |
382 | xfree(handle); | |
383 | return val; | |
384 | } | |
385 | ||
386 | /* send replies */ | |
387 | ||
388 | void | |
389 | send_msg(Buffer *m) | |
390 | { | |
391 | int mlen = buffer_len(m); | |
392 | buffer_put_int(&oqueue, mlen); | |
393 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
394 | buffer_consume(m, mlen); | |
395 | } | |
396 | ||
397 | void | |
398 | send_status(u_int32_t id, u_int32_t error) | |
399 | { | |
400 | Buffer msg; | |
401 | TRACE("sent status id %d error %d", id, error); | |
402 | buffer_init(&msg); | |
403 | buffer_put_char(&msg, SSH_FXP_STATUS); | |
404 | buffer_put_int(&msg, id); | |
405 | buffer_put_int(&msg, error); | |
406 | send_msg(&msg); | |
407 | buffer_free(&msg); | |
408 | } | |
409 | void | |
410 | send_data_or_handle(char type, u_int32_t id, char *data, int dlen) | |
411 | { | |
412 | Buffer msg; | |
413 | buffer_init(&msg); | |
414 | buffer_put_char(&msg, type); | |
415 | buffer_put_int(&msg, id); | |
416 | buffer_put_string(&msg, data, dlen); | |
417 | send_msg(&msg); | |
418 | buffer_free(&msg); | |
419 | } | |
420 | ||
421 | void | |
422 | send_data(u_int32_t id, char *data, int dlen) | |
423 | { | |
424 | TRACE("sent data id %d len %d", id, dlen); | |
425 | send_data_or_handle(SSH_FXP_DATA, id, data, dlen); | |
426 | } | |
427 | ||
428 | void | |
429 | send_handle(u_int32_t id, int handle) | |
430 | { | |
431 | char *string; | |
432 | int hlen; | |
433 | handle_to_string(handle, &string, &hlen); | |
434 | TRACE("sent handle id %d handle %d", id, handle); | |
435 | send_data_or_handle(SSH_FXP_HANDLE, id, string, hlen); | |
436 | xfree(string); | |
437 | } | |
438 | ||
439 | void | |
440 | send_names(u_int32_t id, int count, Stat *stats) | |
441 | { | |
442 | Buffer msg; | |
443 | int i; | |
444 | buffer_init(&msg); | |
445 | buffer_put_char(&msg, SSH_FXP_NAME); | |
446 | buffer_put_int(&msg, id); | |
447 | buffer_put_int(&msg, count); | |
448 | TRACE("sent names id %d count %d", id, count); | |
449 | for (i = 0; i < count; i++) { | |
450 | buffer_put_cstring(&msg, stats[i].name); | |
451 | buffer_put_cstring(&msg, stats[i].long_name); | |
452 | encode_attrib(&msg, &stats[i].attrib); | |
453 | } | |
454 | send_msg(&msg); | |
455 | buffer_free(&msg); | |
456 | } | |
457 | ||
458 | void | |
459 | send_attrib(u_int32_t id, Attrib *a) | |
460 | { | |
461 | Buffer msg; | |
462 | TRACE("sent attrib id %d have 0x%x", id, a->flags); | |
463 | buffer_init(&msg); | |
464 | buffer_put_char(&msg, SSH_FXP_ATTRS); | |
465 | buffer_put_int(&msg, id); | |
466 | encode_attrib(&msg, a); | |
467 | send_msg(&msg); | |
468 | buffer_free(&msg); | |
469 | } | |
470 | ||
471 | /* parse incoming */ | |
472 | ||
473 | void | |
474 | process_init(void) | |
475 | { | |
476 | Buffer msg; | |
477 | int version = buffer_get_int(&iqueue); | |
478 | ||
479 | TRACE("client version %d", version); | |
480 | buffer_init(&msg); | |
481 | buffer_put_char(&msg, SSH_FXP_VERSION); | |
482 | buffer_put_int(&msg, SSH_FILEXFER_VERSION); | |
483 | send_msg(&msg); | |
484 | buffer_free(&msg); | |
485 | } | |
486 | ||
487 | void | |
488 | process_open(void) | |
489 | { | |
490 | u_int32_t id, pflags; | |
491 | Attrib *a; | |
492 | char *name; | |
493 | int handle, fd, flags, mode, status = SSH_FX_FAILURE; | |
494 | ||
495 | id = get_int(); | |
496 | name = get_string(NULL); | |
497 | pflags = get_int(); | |
498 | a = get_attrib(); | |
499 | flags = flags_from_portable(pflags); | |
500 | mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm : 0666; | |
501 | TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode); | |
502 | fd = open(name, flags, mode); | |
503 | if (fd < 0) { | |
504 | status = errno_to_portable(errno); | |
505 | } else { | |
506 | handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL); | |
507 | if (handle < 0) { | |
508 | close(fd); | |
509 | } else { | |
510 | send_handle(id, handle); | |
511 | status = SSH_FX_OK; | |
512 | } | |
513 | } | |
514 | if (status != SSH_FX_OK) | |
515 | send_status(id, status); | |
516 | xfree(name); | |
517 | } | |
518 | ||
519 | void | |
520 | process_close(void) | |
521 | { | |
522 | u_int32_t id; | |
523 | int handle, ret, status = SSH_FX_FAILURE; | |
524 | ||
525 | id = get_int(); | |
526 | handle = get_handle(); | |
527 | TRACE("close id %d handle %d", id, handle); | |
528 | ret = handle_close(handle); | |
529 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; | |
530 | send_status(id, status); | |
531 | } | |
532 | ||
533 | void | |
534 | process_read(void) | |
535 | { | |
536 | char buf[64*1024]; | |
537 | u_int32_t id, off_high, off_low, len; | |
538 | int handle, fd, ret, status = SSH_FX_FAILURE; | |
539 | u_int64_t off; | |
540 | ||
541 | id = get_int(); | |
542 | handle = get_handle(); | |
543 | off_high = get_int(); | |
544 | off_low = get_int(); | |
545 | len = get_int(); | |
546 | ||
547 | off = (((u_int64_t) off_high) << 32) + off_low; | |
548 | TRACE("read id %d handle %d off %qd len %d", id, handle, off, len); | |
549 | if (len > sizeof buf) { | |
550 | len = sizeof buf; | |
551 | log("read change len %d", len); | |
552 | } | |
553 | fd = handle_to_fd(handle); | |
554 | if (fd >= 0) { | |
555 | if (lseek(fd, off, SEEK_SET) < 0) { | |
556 | error("process_read: seek failed"); | |
557 | status = errno_to_portable(errno); | |
558 | } else { | |
559 | ret = read(fd, buf, len); | |
560 | if (ret < 0) { | |
561 | status = errno_to_portable(errno); | |
562 | } else if (ret == 0) { | |
563 | status = SSH_FX_EOF; | |
564 | } else { | |
565 | send_data(id, buf, ret); | |
566 | status = SSH_FX_OK; | |
567 | } | |
568 | } | |
569 | } | |
570 | if (status != SSH_FX_OK) | |
571 | send_status(id, status); | |
572 | } | |
573 | ||
574 | void | |
575 | process_write(void) | |
576 | { | |
577 | u_int32_t id, off_high, off_low; | |
578 | u_int64_t off; | |
579 | u_int len; | |
580 | int handle, fd, ret, status = SSH_FX_FAILURE; | |
581 | char *data; | |
582 | ||
583 | id = get_int(); | |
584 | handle = get_handle(); | |
585 | off_high = get_int(); | |
586 | off_low = get_int(); | |
587 | data = get_string(&len); | |
588 | ||
589 | off = (((u_int64_t) off_high) << 32) + off_low; | |
590 | TRACE("write id %d handle %d off %qd len %d", id, handle, off, len); | |
591 | fd = handle_to_fd(handle); | |
592 | if (fd >= 0) { | |
593 | if (lseek(fd, off, SEEK_SET) < 0) { | |
594 | status = errno_to_portable(errno); | |
595 | error("process_write: seek failed"); | |
596 | } else { | |
597 | /* XXX ATOMICIO ? */ | |
598 | ret = write(fd, data, len); | |
599 | if (ret == -1) { | |
600 | error("process_write: write failed"); | |
601 | status = errno_to_portable(errno); | |
602 | } else if (ret == len) { | |
603 | status = SSH_FX_OK; | |
604 | } else { | |
605 | log("nothing at all written"); | |
606 | } | |
607 | } | |
608 | } | |
609 | send_status(id, status); | |
610 | xfree(data); | |
611 | } | |
612 | ||
613 | void | |
614 | process_do_stat(int do_lstat) | |
615 | { | |
616 | Attrib *a; | |
617 | struct stat st; | |
618 | u_int32_t id; | |
619 | char *name; | |
620 | int ret, status = SSH_FX_FAILURE; | |
621 | ||
622 | id = get_int(); | |
623 | name = get_string(NULL); | |
624 | TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name); | |
625 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); | |
626 | if (ret < 0) { | |
627 | status = errno_to_portable(errno); | |
628 | } else { | |
629 | a = stat_to_attrib(&st); | |
630 | send_attrib(id, a); | |
631 | status = SSH_FX_OK; | |
632 | } | |
633 | if (status != SSH_FX_OK) | |
634 | send_status(id, status); | |
635 | xfree(name); | |
636 | } | |
637 | ||
638 | void | |
639 | process_stat(void) | |
640 | { | |
641 | process_do_stat(0); | |
642 | } | |
643 | ||
644 | void | |
645 | process_lstat(void) | |
646 | { | |
647 | process_do_stat(1); | |
648 | } | |
649 | ||
650 | void | |
651 | process_fstat(void) | |
652 | { | |
653 | Attrib *a; | |
654 | struct stat st; | |
655 | u_int32_t id; | |
656 | int fd, ret, handle, status = SSH_FX_FAILURE; | |
657 | ||
658 | id = get_int(); | |
659 | handle = get_handle(); | |
660 | TRACE("fstat id %d handle %d", id, handle); | |
661 | fd = handle_to_fd(handle); | |
662 | if (fd >= 0) { | |
663 | ret = fstat(fd, &st); | |
664 | if (ret < 0) { | |
665 | status = errno_to_portable(errno); | |
666 | } else { | |
667 | a = stat_to_attrib(&st); | |
668 | send_attrib(id, a); | |
669 | status = SSH_FX_OK; | |
670 | } | |
671 | } | |
672 | if (status != SSH_FX_OK) | |
673 | send_status(id, status); | |
674 | } | |
675 | ||
676 | struct timeval * | |
677 | attrib_to_tv(Attrib *a) | |
678 | { | |
679 | static struct timeval tv[2]; | |
680 | tv[0].tv_sec = a->atime; | |
681 | tv[0].tv_usec = 0; | |
682 | tv[1].tv_sec = a->mtime; | |
683 | tv[1].tv_usec = 0; | |
684 | return tv; | |
685 | } | |
686 | ||
687 | void | |
688 | process_setstat(void) | |
689 | { | |
690 | Attrib *a; | |
691 | u_int32_t id; | |
692 | char *name; | |
693 | int ret; | |
694 | int status = SSH_FX_OK; | |
695 | ||
696 | id = get_int(); | |
697 | name = get_string(NULL); | |
698 | a = get_attrib(); | |
699 | TRACE("setstat id %d name %s", id, name); | |
700 | if (a->flags & SSH_FXA_HAVE_PERM) { | |
701 | ret = chmod(name, a->perm & 0777); | |
702 | if (ret == -1) | |
703 | status = errno_to_portable(errno); | |
704 | } | |
705 | if (a->flags & SSH_FXA_HAVE_TIME) { | |
706 | ret = utimes(name, attrib_to_tv(a)); | |
707 | if (ret == -1) | |
708 | status = errno_to_portable(errno); | |
709 | } | |
710 | send_status(id, status); | |
711 | xfree(name); | |
712 | } | |
713 | ||
714 | void | |
715 | process_fsetstat(void) | |
716 | { | |
717 | Attrib *a; | |
718 | u_int32_t id; | |
719 | int handle, fd, ret; | |
720 | int status = SSH_FX_OK; | |
721 | char *name; | |
722 | ||
723 | id = get_int(); | |
724 | handle = get_handle(); | |
725 | a = get_attrib(); | |
726 | TRACE("fsetstat id %d handle %d", id, handle); | |
727 | fd = handle_to_fd(handle); | |
728 | name = handle_to_name(handle); | |
729 | if ((fd < 0) || (name == NULL)) { | |
730 | status = SSH_FX_FAILURE; | |
731 | } else { | |
732 | if (a->flags & SSH_FXA_HAVE_PERM) { | |
733 | ret = fchmod(fd, a->perm & 0777); | |
734 | if (ret == -1) | |
735 | status = errno_to_portable(errno); | |
736 | } | |
737 | if (a->flags & SSH_FXA_HAVE_TIME) { | |
738 | #ifdef HAVE_FUTIMES | |
739 | ret = futimes(fd, attrib_to_tv(a)); | |
740 | #else | |
741 | ret = utimes(name, attrib_to_tv(a)); | |
742 | #endif | |
743 | if (ret == -1) | |
744 | status = errno_to_portable(errno); | |
745 | } | |
746 | } | |
747 | send_status(id, status); | |
748 | } | |
749 | ||
750 | void | |
751 | process_opendir(void) | |
752 | { | |
753 | DIR *dirp = NULL; | |
754 | char *path; | |
755 | int handle, status = SSH_FX_FAILURE; | |
756 | u_int32_t id; | |
757 | ||
758 | id = get_int(); | |
759 | path = get_string(NULL); | |
760 | TRACE("opendir id %d path %s", id, path); | |
761 | dirp = opendir(path); | |
762 | if (dirp == NULL) { | |
763 | status = errno_to_portable(errno); | |
764 | } else { | |
765 | handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp); | |
766 | if (handle < 0) { | |
767 | closedir(dirp); | |
768 | } else { | |
769 | send_handle(id, handle); | |
770 | status = SSH_FX_OK; | |
771 | } | |
772 | ||
773 | } | |
774 | if (status != SSH_FX_OK) | |
775 | send_status(id, status); | |
776 | xfree(path); | |
777 | } | |
778 | ||
779 | char * | |
780 | ls_file(char *name, struct stat *st) | |
781 | { | |
782 | char buf[1024]; | |
783 | snprintf(buf, sizeof buf, "0%o %d %d %qd %d %s", | |
784 | st->st_mode, st->st_uid, st->st_gid, (long long)st->st_size,(int) st->st_mtime, | |
785 | name); | |
786 | return xstrdup(buf); | |
787 | } | |
788 | ||
789 | void | |
790 | process_readdir(void) | |
791 | { | |
792 | DIR *dirp; | |
793 | struct dirent *dp; | |
794 | char *path; | |
795 | int handle; | |
796 | u_int32_t id; | |
797 | ||
798 | id = get_int(); | |
799 | handle = get_handle(); | |
800 | TRACE("readdir id %d handle %d", id, handle); | |
801 | dirp = handle_to_dir(handle); | |
802 | path = handle_to_name(handle); | |
803 | if (dirp == NULL || path == NULL) { | |
804 | send_status(id, SSH_FX_FAILURE); | |
805 | } else { | |
806 | Attrib *a; | |
807 | struct stat st; | |
808 | char pathname[1024]; | |
809 | Stat *stats; | |
810 | int nstats = 10, count = 0, i; | |
811 | stats = xmalloc(nstats * sizeof(Stat)); | |
812 | while ((dp = readdir(dirp)) != NULL) { | |
813 | if (count >= nstats) { | |
814 | nstats *= 2; | |
815 | stats = xrealloc(stats, nstats * sizeof(Stat)); | |
816 | } | |
817 | /* XXX OVERFLOW ? */ | |
818 | snprintf(pathname, sizeof pathname, | |
819 | "%s/%s", path, dp->d_name); | |
820 | if (lstat(pathname, &st) < 0) | |
821 | continue; | |
822 | a = stat_to_attrib(&st); | |
823 | stats[count].attrib = *a; | |
824 | stats[count].name = xstrdup(dp->d_name); | |
825 | stats[count].long_name = ls_file(dp->d_name, &st); | |
826 | count++; | |
827 | /* send up to 100 entries in one message */ | |
828 | if (count == 100) | |
829 | break; | |
830 | } | |
831 | send_names(id, count, stats); | |
832 | for(i = 0; i < count; i++) { | |
833 | xfree(stats[i].name); | |
834 | xfree(stats[i].long_name); | |
835 | } | |
836 | xfree(stats); | |
837 | } | |
838 | } | |
839 | ||
840 | void | |
841 | process_remove(void) | |
842 | { | |
843 | char *name; | |
844 | u_int32_t id; | |
845 | int status = SSH_FX_FAILURE; | |
846 | int ret; | |
847 | ||
848 | id = get_int(); | |
849 | name = get_string(NULL); | |
850 | TRACE("remove id %d name %s", id, name); | |
851 | ret = remove(name); | |
852 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; | |
853 | send_status(id, status); | |
854 | xfree(name); | |
855 | } | |
856 | ||
857 | void | |
858 | process_mkdir(void) | |
859 | { | |
860 | Attrib *a; | |
861 | u_int32_t id; | |
862 | char *name; | |
863 | int ret, mode, status = SSH_FX_FAILURE; | |
864 | ||
865 | id = get_int(); | |
866 | name = get_string(NULL); | |
867 | a = get_attrib(); | |
868 | mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm & 0777 : 0777; | |
869 | TRACE("mkdir id %d name %s mode 0%o", id, name, mode); | |
870 | ret = mkdir(name, mode); | |
871 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; | |
872 | send_status(id, status); | |
873 | xfree(name); | |
874 | } | |
875 | ||
876 | void | |
877 | process_rmdir(void) | |
878 | { | |
879 | u_int32_t id; | |
880 | char *name; | |
881 | int ret, status; | |
882 | ||
883 | id = get_int(); | |
884 | name = get_string(NULL); | |
885 | TRACE("rmdir id %d name %s", id, name); | |
886 | ret = rmdir(name); | |
887 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; | |
888 | send_status(id, status); | |
889 | xfree(name); | |
890 | } | |
891 | ||
892 | void | |
893 | process_realpath(void) | |
894 | { | |
895 | char resolvedname[MAXPATHLEN]; | |
896 | u_int32_t id; | |
897 | char *path; | |
898 | ||
899 | id = get_int(); | |
900 | path = get_string(NULL); | |
901 | TRACE("realpath id %d path %s", id, path); | |
902 | if (realpath(path, resolvedname) == NULL) { | |
903 | send_status(id, errno_to_portable(errno)); | |
904 | } else { | |
905 | Stat s; | |
906 | attrib_clear(&s.attrib); | |
907 | s.name = s.long_name = resolvedname; | |
908 | send_names(id, 1, &s); | |
909 | } | |
910 | xfree(path); | |
911 | } | |
912 | ||
913 | void | |
914 | process_rename(void) | |
915 | { | |
916 | u_int32_t id; | |
917 | char *oldpath, *newpath; | |
918 | int ret, status; | |
919 | ||
920 | id = get_int(); | |
921 | oldpath = get_string(NULL); | |
922 | newpath = get_string(NULL); | |
923 | TRACE("rename id %d old %s new %s", id, oldpath, newpath); | |
924 | ret = rename(oldpath, newpath); | |
925 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; | |
926 | send_status(id, status); | |
927 | xfree(oldpath); | |
928 | xfree(newpath); | |
929 | } | |
930 | ||
931 | ||
932 | /* stolen from ssh-agent */ | |
933 | ||
934 | void | |
935 | process(void) | |
936 | { | |
937 | unsigned int msg_len; | |
938 | unsigned int type; | |
939 | unsigned char *cp; | |
940 | ||
941 | if (buffer_len(&iqueue) < 5) | |
942 | return; /* Incomplete message. */ | |
943 | cp = (unsigned char *) buffer_ptr(&iqueue); | |
944 | msg_len = GET_32BIT(cp); | |
945 | if (msg_len > 256 * 1024) { | |
946 | error("bad message "); | |
947 | exit(11); | |
948 | } | |
949 | if (buffer_len(&iqueue) < msg_len + 4) | |
950 | return; | |
951 | buffer_consume(&iqueue, 4); | |
952 | type = buffer_get_char(&iqueue); | |
953 | switch (type) { | |
954 | case SSH_FXP_INIT: | |
955 | process_init(); | |
956 | break; | |
957 | case SSH_FXP_OPEN: | |
958 | process_open(); | |
959 | break; | |
960 | case SSH_FXP_CLOSE: | |
961 | process_close(); | |
962 | break; | |
963 | case SSH_FXP_READ: | |
964 | process_read(); | |
965 | break; | |
966 | case SSH_FXP_WRITE: | |
967 | process_write(); | |
968 | break; | |
969 | case SSH_FXP_LSTAT: | |
970 | process_lstat(); | |
971 | break; | |
972 | case SSH_FXP_FSTAT: | |
973 | process_fstat(); | |
974 | break; | |
975 | case SSH_FXP_SETSTAT: | |
976 | process_setstat(); | |
977 | break; | |
978 | case SSH_FXP_FSETSTAT: | |
979 | process_fsetstat(); | |
980 | break; | |
981 | case SSH_FXP_OPENDIR: | |
982 | process_opendir(); | |
983 | break; | |
984 | case SSH_FXP_READDIR: | |
985 | process_readdir(); | |
986 | break; | |
987 | case SSH_FXP_REMOVE: | |
988 | process_remove(); | |
989 | break; | |
990 | case SSH_FXP_MKDIR: | |
991 | process_mkdir(); | |
992 | break; | |
993 | case SSH_FXP_RMDIR: | |
994 | process_rmdir(); | |
995 | break; | |
996 | case SSH_FXP_REALPATH: | |
997 | process_realpath(); | |
998 | break; | |
999 | case SSH_FXP_STAT: | |
1000 | process_stat(); | |
1001 | break; | |
1002 | case SSH_FXP_RENAME: | |
1003 | process_rename(); | |
1004 | break; | |
1005 | default: | |
1006 | error("Unknown message %d", type); | |
1007 | break; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | int | |
1012 | main(int ac, char **av) | |
1013 | { | |
1014 | fd_set rset, wset; | |
1015 | int in, out, max; | |
1016 | ssize_t len, olen; | |
1017 | ||
1018 | handle_init(); | |
1019 | ||
1020 | in = dup(STDIN_FILENO); | |
1021 | out = dup(STDOUT_FILENO); | |
1022 | ||
1023 | max = 0; | |
1024 | if (in > max) | |
1025 | max = in; | |
1026 | if (out > max) | |
1027 | max = out; | |
1028 | ||
1029 | buffer_init(&iqueue); | |
1030 | buffer_init(&oqueue); | |
1031 | ||
1032 | for (;;) { | |
1033 | FD_ZERO(&rset); | |
1034 | FD_ZERO(&wset); | |
1035 | ||
1036 | FD_SET(in, &rset); | |
1037 | olen = buffer_len(&oqueue); | |
1038 | if (olen > 0) | |
1039 | FD_SET(out, &wset); | |
1040 | ||
1041 | if (select(max+1, &rset, &wset, NULL, NULL) < 0) { | |
1042 | if (errno == EINTR) | |
1043 | continue; | |
1044 | exit(2); | |
1045 | } | |
1046 | ||
1047 | /* copy stdin to iqueue */ | |
1048 | if (FD_ISSET(in, &rset)) { | |
1049 | char buf[4*4096]; | |
1050 | len = read(in, buf, sizeof buf); | |
1051 | if (len == 0) { | |
1052 | debug("read eof"); | |
1053 | exit(0); | |
1054 | } else if (len < 0) { | |
1055 | error("read error"); | |
1056 | exit(1); | |
1057 | } else { | |
1058 | buffer_append(&iqueue, buf, len); | |
1059 | } | |
1060 | } | |
1061 | /* send oqueue to stdout */ | |
1062 | if (FD_ISSET(out, &wset)) { | |
1063 | len = write(out, buffer_ptr(&oqueue), olen); | |
1064 | if (len < 0) { | |
1065 | error("write error"); | |
1066 | exit(1); | |
1067 | } else { | |
1068 | buffer_consume(&oqueue, len); | |
1069 | } | |
1070 | } | |
1071 | /* process requests from client */ | |
1072 | process(); | |
1073 | } | |
1074 | } |