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1 | /* | |
2 | * Copyright (c) 2001 Damien Miller. 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 | ||
25 | /* XXX: memleaks */ | |
26 | /* XXX: signed vs unsigned */ | |
27 | /* XXX: redesign to allow concurrent overlapped operations */ | |
28 | /* XXX: we use fatal too much, error may be more appropriate in places */ | |
29 | /* XXX: copy between two remote sites */ | |
30 | ||
31 | #include "includes.h" | |
32 | RCSID("$OpenBSD: sftp-client.c,v 1.20 2002/02/05 00:00:46 djm Exp $"); | |
33 | ||
34 | #include "buffer.h" | |
35 | #include "bufaux.h" | |
36 | #include "getput.h" | |
37 | #include "xmalloc.h" | |
38 | #include "log.h" | |
39 | #include "atomicio.h" | |
40 | ||
41 | #include "sftp.h" | |
42 | #include "sftp-common.h" | |
43 | #include "sftp-client.h" | |
44 | ||
45 | /* Message ID */ | |
46 | static u_int msg_id = 1; | |
47 | ||
48 | static void | |
49 | send_msg(int fd, Buffer *m) | |
50 | { | |
51 | int mlen = buffer_len(m); | |
52 | int len; | |
53 | Buffer oqueue; | |
54 | ||
55 | buffer_init(&oqueue); | |
56 | buffer_put_int(&oqueue, mlen); | |
57 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
58 | buffer_consume(m, mlen); | |
59 | ||
60 | len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue)); | |
61 | if (len <= 0) | |
62 | fatal("Couldn't send packet: %s", strerror(errno)); | |
63 | ||
64 | buffer_free(&oqueue); | |
65 | } | |
66 | ||
67 | static void | |
68 | get_msg(int fd, Buffer *m) | |
69 | { | |
70 | u_int len, msg_len; | |
71 | unsigned char buf[4096]; | |
72 | ||
73 | len = atomicio(read, fd, buf, 4); | |
74 | if (len == 0) | |
75 | fatal("Connection closed"); | |
76 | else if (len == -1) | |
77 | fatal("Couldn't read packet: %s", strerror(errno)); | |
78 | ||
79 | msg_len = GET_32BIT(buf); | |
80 | if (msg_len > 256 * 1024) | |
81 | fatal("Received message too long %d", msg_len); | |
82 | ||
83 | while (msg_len) { | |
84 | len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf))); | |
85 | if (len == 0) | |
86 | fatal("Connection closed"); | |
87 | else if (len == -1) | |
88 | fatal("Couldn't read packet: %s", strerror(errno)); | |
89 | ||
90 | msg_len -= len; | |
91 | buffer_append(m, buf, len); | |
92 | } | |
93 | } | |
94 | ||
95 | static void | |
96 | send_string_request(int fd, u_int id, u_int code, char *s, | |
97 | u_int len) | |
98 | { | |
99 | Buffer msg; | |
100 | ||
101 | buffer_init(&msg); | |
102 | buffer_put_char(&msg, code); | |
103 | buffer_put_int(&msg, id); | |
104 | buffer_put_string(&msg, s, len); | |
105 | send_msg(fd, &msg); | |
106 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
107 | buffer_free(&msg); | |
108 | } | |
109 | ||
110 | static void | |
111 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
112 | u_int len, Attrib *a) | |
113 | { | |
114 | Buffer msg; | |
115 | ||
116 | buffer_init(&msg); | |
117 | buffer_put_char(&msg, code); | |
118 | buffer_put_int(&msg, id); | |
119 | buffer_put_string(&msg, s, len); | |
120 | encode_attrib(&msg, a); | |
121 | send_msg(fd, &msg); | |
122 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
123 | buffer_free(&msg); | |
124 | } | |
125 | ||
126 | static u_int | |
127 | get_status(int fd, int expected_id) | |
128 | { | |
129 | Buffer msg; | |
130 | u_int type, id, status; | |
131 | ||
132 | buffer_init(&msg); | |
133 | get_msg(fd, &msg); | |
134 | type = buffer_get_char(&msg); | |
135 | id = buffer_get_int(&msg); | |
136 | ||
137 | if (id != expected_id) | |
138 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
139 | if (type != SSH2_FXP_STATUS) | |
140 | fatal("Expected SSH2_FXP_STATUS(%d) packet, got %d", | |
141 | SSH2_FXP_STATUS, type); | |
142 | ||
143 | status = buffer_get_int(&msg); | |
144 | buffer_free(&msg); | |
145 | ||
146 | debug3("SSH2_FXP_STATUS %d", status); | |
147 | ||
148 | return(status); | |
149 | } | |
150 | ||
151 | static char * | |
152 | get_handle(int fd, u_int expected_id, u_int *len) | |
153 | { | |
154 | Buffer msg; | |
155 | u_int type, id; | |
156 | char *handle; | |
157 | ||
158 | buffer_init(&msg); | |
159 | get_msg(fd, &msg); | |
160 | type = buffer_get_char(&msg); | |
161 | id = buffer_get_int(&msg); | |
162 | ||
163 | if (id != expected_id) | |
164 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
165 | if (type == SSH2_FXP_STATUS) { | |
166 | int status = buffer_get_int(&msg); | |
167 | ||
168 | error("Couldn't get handle: %s", fx2txt(status)); | |
169 | return(NULL); | |
170 | } else if (type != SSH2_FXP_HANDLE) | |
171 | fatal("Expected SSH2_FXP_HANDLE(%d) packet, got %d", | |
172 | SSH2_FXP_HANDLE, type); | |
173 | ||
174 | handle = buffer_get_string(&msg, len); | |
175 | buffer_free(&msg); | |
176 | ||
177 | return(handle); | |
178 | } | |
179 | ||
180 | static Attrib * | |
181 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
182 | { | |
183 | Buffer msg; | |
184 | u_int type, id; | |
185 | Attrib *a; | |
186 | ||
187 | buffer_init(&msg); | |
188 | get_msg(fd, &msg); | |
189 | ||
190 | type = buffer_get_char(&msg); | |
191 | id = buffer_get_int(&msg); | |
192 | ||
193 | debug3("Received stat reply T:%d I:%d", type, id); | |
194 | if (id != expected_id) | |
195 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
196 | if (type == SSH2_FXP_STATUS) { | |
197 | int status = buffer_get_int(&msg); | |
198 | ||
199 | if (quiet) | |
200 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
201 | else | |
202 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
203 | return(NULL); | |
204 | } else if (type != SSH2_FXP_ATTRS) { | |
205 | fatal("Expected SSH2_FXP_ATTRS(%d) packet, got %d", | |
206 | SSH2_FXP_ATTRS, type); | |
207 | } | |
208 | a = decode_attrib(&msg); | |
209 | buffer_free(&msg); | |
210 | ||
211 | return(a); | |
212 | } | |
213 | ||
214 | int | |
215 | do_init(int fd_in, int fd_out) | |
216 | { | |
217 | int type, version; | |
218 | Buffer msg; | |
219 | ||
220 | buffer_init(&msg); | |
221 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
222 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
223 | send_msg(fd_out, &msg); | |
224 | ||
225 | buffer_clear(&msg); | |
226 | ||
227 | get_msg(fd_in, &msg); | |
228 | ||
229 | /* Expecting a VERSION reply */ | |
230 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
231 | error("Invalid packet back from SSH2_FXP_INIT (type %d)", | |
232 | type); | |
233 | buffer_free(&msg); | |
234 | return(-1); | |
235 | } | |
236 | version = buffer_get_int(&msg); | |
237 | ||
238 | debug2("Remote version: %d", version); | |
239 | ||
240 | /* Check for extensions */ | |
241 | while (buffer_len(&msg) > 0) { | |
242 | char *name = buffer_get_string(&msg, NULL); | |
243 | char *value = buffer_get_string(&msg, NULL); | |
244 | ||
245 | debug2("Init extension: \"%s\"", name); | |
246 | xfree(name); | |
247 | xfree(value); | |
248 | } | |
249 | ||
250 | buffer_free(&msg); | |
251 | ||
252 | return(version); | |
253 | } | |
254 | ||
255 | int | |
256 | do_close(int fd_in, int fd_out, char *handle, u_int handle_len) | |
257 | { | |
258 | u_int id, status; | |
259 | Buffer msg; | |
260 | ||
261 | buffer_init(&msg); | |
262 | ||
263 | id = msg_id++; | |
264 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
265 | buffer_put_int(&msg, id); | |
266 | buffer_put_string(&msg, handle, handle_len); | |
267 | send_msg(fd_out, &msg); | |
268 | debug3("Sent message SSH2_FXP_CLOSE I:%d", id); | |
269 | ||
270 | status = get_status(fd_in, id); | |
271 | if (status != SSH2_FX_OK) | |
272 | error("Couldn't close file: %s", fx2txt(status)); | |
273 | ||
274 | buffer_free(&msg); | |
275 | ||
276 | return(status); | |
277 | } | |
278 | ||
279 | ||
280 | static int | |
281 | do_lsreaddir(int fd_in, int fd_out, char *path, int printflag, | |
282 | SFTP_DIRENT ***dir) | |
283 | { | |
284 | Buffer msg; | |
285 | u_int type, id, handle_len, i, expected_id, ents = 0; | |
286 | char *handle; | |
287 | ||
288 | id = msg_id++; | |
289 | ||
290 | buffer_init(&msg); | |
291 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
292 | buffer_put_int(&msg, id); | |
293 | buffer_put_cstring(&msg, path); | |
294 | send_msg(fd_out, &msg); | |
295 | ||
296 | buffer_clear(&msg); | |
297 | ||
298 | handle = get_handle(fd_in, id, &handle_len); | |
299 | if (handle == NULL) | |
300 | return(-1); | |
301 | ||
302 | if (dir) { | |
303 | ents = 0; | |
304 | *dir = xmalloc(sizeof(**dir)); | |
305 | (*dir)[0] = NULL; | |
306 | } | |
307 | ||
308 | for (;;) { | |
309 | int count; | |
310 | ||
311 | id = expected_id = msg_id++; | |
312 | ||
313 | debug3("Sending SSH2_FXP_READDIR I:%d", id); | |
314 | ||
315 | buffer_clear(&msg); | |
316 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
317 | buffer_put_int(&msg, id); | |
318 | buffer_put_string(&msg, handle, handle_len); | |
319 | send_msg(fd_out, &msg); | |
320 | ||
321 | buffer_clear(&msg); | |
322 | ||
323 | get_msg(fd_in, &msg); | |
324 | ||
325 | type = buffer_get_char(&msg); | |
326 | id = buffer_get_int(&msg); | |
327 | ||
328 | debug3("Received reply T:%d I:%d", type, id); | |
329 | ||
330 | if (id != expected_id) | |
331 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
332 | ||
333 | if (type == SSH2_FXP_STATUS) { | |
334 | int status = buffer_get_int(&msg); | |
335 | ||
336 | debug3("Received SSH2_FXP_STATUS %d", status); | |
337 | ||
338 | if (status == SSH2_FX_EOF) { | |
339 | break; | |
340 | } else { | |
341 | error("Couldn't read directory: %s", | |
342 | fx2txt(status)); | |
343 | do_close(fd_in, fd_out, handle, handle_len); | |
344 | return(status); | |
345 | } | |
346 | } else if (type != SSH2_FXP_NAME) | |
347 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
348 | SSH2_FXP_NAME, type); | |
349 | ||
350 | count = buffer_get_int(&msg); | |
351 | if (count == 0) | |
352 | break; | |
353 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
354 | for (i = 0; i < count; i++) { | |
355 | char *filename, *longname; | |
356 | Attrib *a; | |
357 | ||
358 | filename = buffer_get_string(&msg, NULL); | |
359 | longname = buffer_get_string(&msg, NULL); | |
360 | a = decode_attrib(&msg); | |
361 | ||
362 | if (printflag) | |
363 | printf("%s\n", longname); | |
364 | ||
365 | if (dir) { | |
366 | *dir = xrealloc(*dir, sizeof(**dir) * | |
367 | (ents + 2)); | |
368 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
369 | (*dir)[ents]->filename = xstrdup(filename); | |
370 | (*dir)[ents]->longname = xstrdup(longname); | |
371 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
372 | (*dir)[++ents] = NULL; | |
373 | } | |
374 | ||
375 | xfree(filename); | |
376 | xfree(longname); | |
377 | } | |
378 | } | |
379 | ||
380 | buffer_free(&msg); | |
381 | do_close(fd_in, fd_out, handle, handle_len); | |
382 | xfree(handle); | |
383 | ||
384 | return(0); | |
385 | } | |
386 | ||
387 | int | |
388 | do_ls(int fd_in, int fd_out, char *path) | |
389 | { | |
390 | return(do_lsreaddir(fd_in, fd_out, path, 1, NULL)); | |
391 | } | |
392 | ||
393 | int | |
394 | do_readdir(int fd_in, int fd_out, char *path, SFTP_DIRENT ***dir) | |
395 | { | |
396 | return(do_lsreaddir(fd_in, fd_out, path, 0, dir)); | |
397 | } | |
398 | ||
399 | void free_sftp_dirents(SFTP_DIRENT **s) | |
400 | { | |
401 | int i; | |
402 | ||
403 | for (i = 0; s[i]; i++) { | |
404 | xfree(s[i]->filename); | |
405 | xfree(s[i]->longname); | |
406 | xfree(s[i]); | |
407 | } | |
408 | xfree(s); | |
409 | } | |
410 | ||
411 | int | |
412 | do_rm(int fd_in, int fd_out, char *path) | |
413 | { | |
414 | u_int status, id; | |
415 | ||
416 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
417 | ||
418 | id = msg_id++; | |
419 | send_string_request(fd_out, id, SSH2_FXP_REMOVE, path, strlen(path)); | |
420 | status = get_status(fd_in, id); | |
421 | if (status != SSH2_FX_OK) | |
422 | error("Couldn't delete file: %s", fx2txt(status)); | |
423 | return(status); | |
424 | } | |
425 | ||
426 | int | |
427 | do_mkdir(int fd_in, int fd_out, char *path, Attrib *a) | |
428 | { | |
429 | u_int status, id; | |
430 | ||
431 | id = msg_id++; | |
432 | send_string_attrs_request(fd_out, id, SSH2_FXP_MKDIR, path, | |
433 | strlen(path), a); | |
434 | ||
435 | status = get_status(fd_in, id); | |
436 | if (status != SSH2_FX_OK) | |
437 | error("Couldn't create directory: %s", fx2txt(status)); | |
438 | ||
439 | return(status); | |
440 | } | |
441 | ||
442 | int | |
443 | do_rmdir(int fd_in, int fd_out, char *path) | |
444 | { | |
445 | u_int status, id; | |
446 | ||
447 | id = msg_id++; | |
448 | send_string_request(fd_out, id, SSH2_FXP_RMDIR, path, strlen(path)); | |
449 | ||
450 | status = get_status(fd_in, id); | |
451 | if (status != SSH2_FX_OK) | |
452 | error("Couldn't remove directory: %s", fx2txt(status)); | |
453 | ||
454 | return(status); | |
455 | } | |
456 | ||
457 | Attrib * | |
458 | do_stat(int fd_in, int fd_out, char *path, int quiet) | |
459 | { | |
460 | u_int id; | |
461 | ||
462 | id = msg_id++; | |
463 | send_string_request(fd_out, id, SSH2_FXP_STAT, path, strlen(path)); | |
464 | return(get_decode_stat(fd_in, id, quiet)); | |
465 | } | |
466 | ||
467 | Attrib * | |
468 | do_lstat(int fd_in, int fd_out, char *path, int quiet) | |
469 | { | |
470 | u_int id; | |
471 | ||
472 | id = msg_id++; | |
473 | send_string_request(fd_out, id, SSH2_FXP_LSTAT, path, strlen(path)); | |
474 | return(get_decode_stat(fd_in, id, quiet)); | |
475 | } | |
476 | ||
477 | Attrib * | |
478 | do_fstat(int fd_in, int fd_out, char *handle, u_int handle_len, int quiet) | |
479 | { | |
480 | u_int id; | |
481 | ||
482 | id = msg_id++; | |
483 | send_string_request(fd_out, id, SSH2_FXP_FSTAT, handle, handle_len); | |
484 | return(get_decode_stat(fd_in, id, quiet)); | |
485 | } | |
486 | ||
487 | int | |
488 | do_setstat(int fd_in, int fd_out, char *path, Attrib *a) | |
489 | { | |
490 | u_int status, id; | |
491 | ||
492 | id = msg_id++; | |
493 | send_string_attrs_request(fd_out, id, SSH2_FXP_SETSTAT, path, | |
494 | strlen(path), a); | |
495 | ||
496 | status = get_status(fd_in, id); | |
497 | if (status != SSH2_FX_OK) | |
498 | error("Couldn't setstat on \"%s\": %s", path, | |
499 | fx2txt(status)); | |
500 | ||
501 | return(status); | |
502 | } | |
503 | ||
504 | int | |
505 | do_fsetstat(int fd_in, int fd_out, char *handle, u_int handle_len, | |
506 | Attrib *a) | |
507 | { | |
508 | u_int status, id; | |
509 | ||
510 | id = msg_id++; | |
511 | send_string_attrs_request(fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
512 | handle_len, a); | |
513 | ||
514 | status = get_status(fd_in, id); | |
515 | if (status != SSH2_FX_OK) | |
516 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
517 | ||
518 | return(status); | |
519 | } | |
520 | ||
521 | char * | |
522 | do_realpath(int fd_in, int fd_out, char *path) | |
523 | { | |
524 | Buffer msg; | |
525 | u_int type, expected_id, count, id; | |
526 | char *filename, *longname; | |
527 | Attrib *a; | |
528 | ||
529 | expected_id = id = msg_id++; | |
530 | send_string_request(fd_out, id, SSH2_FXP_REALPATH, path, strlen(path)); | |
531 | ||
532 | buffer_init(&msg); | |
533 | ||
534 | get_msg(fd_in, &msg); | |
535 | type = buffer_get_char(&msg); | |
536 | id = buffer_get_int(&msg); | |
537 | ||
538 | if (id != expected_id) | |
539 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
540 | ||
541 | if (type == SSH2_FXP_STATUS) { | |
542 | u_int status = buffer_get_int(&msg); | |
543 | ||
544 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
545 | return(NULL); | |
546 | } else if (type != SSH2_FXP_NAME) | |
547 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
548 | SSH2_FXP_NAME, type); | |
549 | ||
550 | count = buffer_get_int(&msg); | |
551 | if (count != 1) | |
552 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
553 | ||
554 | filename = buffer_get_string(&msg, NULL); | |
555 | longname = buffer_get_string(&msg, NULL); | |
556 | a = decode_attrib(&msg); | |
557 | ||
558 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
559 | ||
560 | xfree(longname); | |
561 | ||
562 | buffer_free(&msg); | |
563 | ||
564 | return(filename); | |
565 | } | |
566 | ||
567 | int | |
568 | do_rename(int fd_in, int fd_out, char *oldpath, char *newpath) | |
569 | { | |
570 | Buffer msg; | |
571 | u_int status, id; | |
572 | ||
573 | buffer_init(&msg); | |
574 | ||
575 | /* Send rename request */ | |
576 | id = msg_id++; | |
577 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
578 | buffer_put_int(&msg, id); | |
579 | buffer_put_cstring(&msg, oldpath); | |
580 | buffer_put_cstring(&msg, newpath); | |
581 | send_msg(fd_out, &msg); | |
582 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
583 | newpath); | |
584 | buffer_free(&msg); | |
585 | ||
586 | status = get_status(fd_in, id); | |
587 | if (status != SSH2_FX_OK) | |
588 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
589 | fx2txt(status)); | |
590 | ||
591 | return(status); | |
592 | } | |
593 | ||
594 | int | |
595 | do_symlink(int fd_in, int fd_out, char *oldpath, char *newpath) | |
596 | { | |
597 | Buffer msg; | |
598 | u_int status, id; | |
599 | ||
600 | buffer_init(&msg); | |
601 | ||
602 | /* Send rename request */ | |
603 | id = msg_id++; | |
604 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
605 | buffer_put_int(&msg, id); | |
606 | buffer_put_cstring(&msg, oldpath); | |
607 | buffer_put_cstring(&msg, newpath); | |
608 | send_msg(fd_out, &msg); | |
609 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
610 | newpath); | |
611 | buffer_free(&msg); | |
612 | ||
613 | status = get_status(fd_in, id); | |
614 | if (status != SSH2_FX_OK) | |
615 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
616 | fx2txt(status)); | |
617 | ||
618 | return(status); | |
619 | } | |
620 | ||
621 | char * | |
622 | do_readlink(int fd_in, int fd_out, char *path) | |
623 | { | |
624 | Buffer msg; | |
625 | u_int type, expected_id, count, id; | |
626 | char *filename, *longname; | |
627 | Attrib *a; | |
628 | ||
629 | expected_id = id = msg_id++; | |
630 | send_string_request(fd_out, id, SSH2_FXP_READLINK, path, strlen(path)); | |
631 | ||
632 | buffer_init(&msg); | |
633 | ||
634 | get_msg(fd_in, &msg); | |
635 | type = buffer_get_char(&msg); | |
636 | id = buffer_get_int(&msg); | |
637 | ||
638 | if (id != expected_id) | |
639 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
640 | ||
641 | if (type == SSH2_FXP_STATUS) { | |
642 | u_int status = buffer_get_int(&msg); | |
643 | ||
644 | error("Couldn't readlink: %s", fx2txt(status)); | |
645 | return(NULL); | |
646 | } else if (type != SSH2_FXP_NAME) | |
647 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
648 | SSH2_FXP_NAME, type); | |
649 | ||
650 | count = buffer_get_int(&msg); | |
651 | if (count != 1) | |
652 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
653 | ||
654 | filename = buffer_get_string(&msg, NULL); | |
655 | longname = buffer_get_string(&msg, NULL); | |
656 | a = decode_attrib(&msg); | |
657 | ||
658 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
659 | ||
660 | xfree(longname); | |
661 | ||
662 | buffer_free(&msg); | |
663 | ||
664 | return(filename); | |
665 | } | |
666 | ||
667 | int | |
668 | do_download(int fd_in, int fd_out, char *remote_path, char *local_path, | |
669 | int pflag, size_t buflen) | |
670 | { | |
671 | int local_fd, status; | |
672 | u_int expected_id, handle_len, mode, type, id; | |
673 | u_int64_t offset; | |
674 | char *handle; | |
675 | Buffer msg; | |
676 | Attrib junk, *a; | |
677 | ||
678 | a = do_stat(fd_in, fd_out, remote_path, 0); | |
679 | if (a == NULL) | |
680 | return(-1); | |
681 | ||
682 | /* XXX: should we preserve set[ug]id? */ | |
683 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
684 | mode = S_IWRITE | (a->perm & 0777); | |
685 | else | |
686 | mode = 0666; | |
687 | ||
688 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
689 | (a->perm & S_IFDIR)) { | |
690 | error("Cannot download a directory: %s", remote_path); | |
691 | return(-1); | |
692 | } | |
693 | ||
694 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode); | |
695 | if (local_fd == -1) { | |
696 | error("Couldn't open local file \"%s\" for writing: %s", | |
697 | local_path, strerror(errno)); | |
698 | return(-1); | |
699 | } | |
700 | ||
701 | buffer_init(&msg); | |
702 | ||
703 | /* Send open request */ | |
704 | id = msg_id++; | |
705 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
706 | buffer_put_int(&msg, id); | |
707 | buffer_put_cstring(&msg, remote_path); | |
708 | buffer_put_int(&msg, SSH2_FXF_READ); | |
709 | attrib_clear(&junk); /* Send empty attributes */ | |
710 | encode_attrib(&msg, &junk); | |
711 | send_msg(fd_out, &msg); | |
712 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
713 | ||
714 | handle = get_handle(fd_in, id, &handle_len); | |
715 | if (handle == NULL) { | |
716 | buffer_free(&msg); | |
717 | close(local_fd); | |
718 | return(-1); | |
719 | } | |
720 | ||
721 | /* Read from remote and write to local */ | |
722 | offset = 0; | |
723 | for (;;) { | |
724 | u_int len; | |
725 | char *data; | |
726 | ||
727 | id = expected_id = msg_id++; | |
728 | ||
729 | buffer_clear(&msg); | |
730 | buffer_put_char(&msg, SSH2_FXP_READ); | |
731 | buffer_put_int(&msg, id); | |
732 | buffer_put_string(&msg, handle, handle_len); | |
733 | buffer_put_int64(&msg, offset); | |
734 | buffer_put_int(&msg, buflen); | |
735 | send_msg(fd_out, &msg); | |
736 | debug3("Sent message SSH2_FXP_READ I:%d O:%llu S:%u", | |
737 | id, (u_int64_t)offset, buflen); | |
738 | ||
739 | buffer_clear(&msg); | |
740 | ||
741 | get_msg(fd_in, &msg); | |
742 | type = buffer_get_char(&msg); | |
743 | id = buffer_get_int(&msg); | |
744 | debug3("Received reply T:%d I:%d", type, id); | |
745 | if (id != expected_id) | |
746 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
747 | if (type == SSH2_FXP_STATUS) { | |
748 | status = buffer_get_int(&msg); | |
749 | ||
750 | if (status == SSH2_FX_EOF) | |
751 | break; | |
752 | else { | |
753 | error("Couldn't read from remote " | |
754 | "file \"%s\" : %s", remote_path, | |
755 | fx2txt(status)); | |
756 | do_close(fd_in, fd_out, handle, handle_len); | |
757 | goto done; | |
758 | } | |
759 | } else if (type != SSH2_FXP_DATA) { | |
760 | fatal("Expected SSH2_FXP_DATA(%d) packet, got %d", | |
761 | SSH2_FXP_DATA, type); | |
762 | } | |
763 | ||
764 | data = buffer_get_string(&msg, &len); | |
765 | if (len > buflen) | |
766 | fatal("Received more data than asked for %d > %d", | |
767 | len, buflen); | |
768 | ||
769 | debug3("In read loop, got %d offset %llu", len, | |
770 | (u_int64_t)offset); | |
771 | if (atomicio(write, local_fd, data, len) != len) { | |
772 | error("Couldn't write to \"%s\": %s", local_path, | |
773 | strerror(errno)); | |
774 | do_close(fd_in, fd_out, handle, handle_len); | |
775 | status = -1; | |
776 | xfree(data); | |
777 | goto done; | |
778 | } | |
779 | ||
780 | offset += len; | |
781 | xfree(data); | |
782 | } | |
783 | status = do_close(fd_in, fd_out, handle, handle_len); | |
784 | ||
785 | /* Override umask and utimes if asked */ | |
786 | #ifdef HAVE_FCHMOD | |
787 | if (pflag && fchmod(local_fd, mode) == -1) | |
788 | #else | |
789 | if (pflag && chmod(local_path, mode) == -1) | |
790 | #endif /* HAVE_FCHMOD */ | |
791 | error("Couldn't set mode on \"%s\": %s", local_path, | |
792 | strerror(errno)); | |
793 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
794 | struct timeval tv[2]; | |
795 | tv[0].tv_sec = a->atime; | |
796 | tv[1].tv_sec = a->mtime; | |
797 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
798 | if (utimes(local_path, tv) == -1) | |
799 | error("Can't set times on \"%s\": %s", local_path, | |
800 | strerror(errno)); | |
801 | } | |
802 | ||
803 | done: | |
804 | close(local_fd); | |
805 | buffer_free(&msg); | |
806 | xfree(handle); | |
807 | return status; | |
808 | } | |
809 | ||
810 | int | |
811 | do_upload(int fd_in, int fd_out, char *local_path, char *remote_path, | |
812 | int pflag, size_t buflen) | |
813 | { | |
814 | int local_fd, status; | |
815 | u_int handle_len, id; | |
816 | u_int64_t offset; | |
817 | char *handle, *data; | |
818 | Buffer msg; | |
819 | struct stat sb; | |
820 | Attrib a; | |
821 | ||
822 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
823 | error("Couldn't open local file \"%s\" for reading: %s", | |
824 | local_path, strerror(errno)); | |
825 | return(-1); | |
826 | } | |
827 | if (fstat(local_fd, &sb) == -1) { | |
828 | error("Couldn't fstat local file \"%s\": %s", | |
829 | local_path, strerror(errno)); | |
830 | close(local_fd); | |
831 | return(-1); | |
832 | } | |
833 | stat_to_attrib(&sb, &a); | |
834 | ||
835 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
836 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
837 | a.perm &= 0777; | |
838 | if (!pflag) | |
839 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
840 | ||
841 | buffer_init(&msg); | |
842 | ||
843 | /* Send open request */ | |
844 | id = msg_id++; | |
845 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
846 | buffer_put_int(&msg, id); | |
847 | buffer_put_cstring(&msg, remote_path); | |
848 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
849 | encode_attrib(&msg, &a); | |
850 | send_msg(fd_out, &msg); | |
851 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
852 | ||
853 | buffer_clear(&msg); | |
854 | ||
855 | handle = get_handle(fd_in, id, &handle_len); | |
856 | if (handle == NULL) { | |
857 | close(local_fd); | |
858 | buffer_free(&msg); | |
859 | return(-1); | |
860 | } | |
861 | ||
862 | data = xmalloc(buflen); | |
863 | ||
864 | /* Read from local and write to remote */ | |
865 | offset = 0; | |
866 | for (;;) { | |
867 | int len; | |
868 | ||
869 | /* | |
870 | * Can't use atomicio here because it returns 0 on EOF, thus losing | |
871 | * the last block of the file | |
872 | */ | |
873 | do | |
874 | len = read(local_fd, data, buflen); | |
875 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
876 | ||
877 | if (len == -1) | |
878 | fatal("Couldn't read from \"%s\": %s", local_path, | |
879 | strerror(errno)); | |
880 | if (len == 0) | |
881 | break; | |
882 | ||
883 | buffer_clear(&msg); | |
884 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
885 | buffer_put_int(&msg, ++id); | |
886 | buffer_put_string(&msg, handle, handle_len); | |
887 | buffer_put_int64(&msg, offset); | |
888 | buffer_put_string(&msg, data, len); | |
889 | send_msg(fd_out, &msg); | |
890 | debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u", | |
891 | id, (u_int64_t)offset, len); | |
892 | ||
893 | status = get_status(fd_in, id); | |
894 | if (status != SSH2_FX_OK) { | |
895 | error("Couldn't write to remote file \"%s\": %s", | |
896 | remote_path, fx2txt(status)); | |
897 | do_close(fd_in, fd_out, handle, handle_len); | |
898 | close(local_fd); | |
899 | goto done; | |
900 | } | |
901 | debug3("In write loop, got %d offset %llu", len, | |
902 | (u_int64_t)offset); | |
903 | ||
904 | offset += len; | |
905 | } | |
906 | xfree(data); | |
907 | ||
908 | if (close(local_fd) == -1) { | |
909 | error("Couldn't close local file \"%s\": %s", local_path, | |
910 | strerror(errno)); | |
911 | do_close(fd_in, fd_out, handle, handle_len); | |
912 | status = -1; | |
913 | goto done; | |
914 | } | |
915 | ||
916 | /* Override umask and utimes if asked */ | |
917 | if (pflag) | |
918 | do_fsetstat(fd_in, fd_out, handle, handle_len, &a); | |
919 | ||
920 | status = do_close(fd_in, fd_out, handle, handle_len); | |
921 | ||
922 | done: | |
923 | xfree(handle); | |
924 | buffer_free(&msg); | |
925 | return status; | |
926 | } | |
927 |