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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 1.16 2001/04/05 10:42:52 markus Exp $"); | |
33 | ||
34 | #include "ssh.h" | |
35 | #include "buffer.h" | |
36 | #include "bufaux.h" | |
37 | #include "getput.h" | |
38 | #include "xmalloc.h" | |
39 | #include "log.h" | |
40 | #include "atomicio.h" | |
41 | #include "pathnames.h" | |
42 | ||
43 | #include "sftp.h" | |
44 | #include "sftp-common.h" | |
45 | #include "sftp-client.h" | |
46 | ||
47 | /* How much data to read/write at at time during copies */ | |
48 | /* XXX: what should this be? */ | |
49 | #define COPY_SIZE 8192 | |
50 | ||
51 | /* Message ID */ | |
52 | static u_int msg_id = 1; | |
53 | ||
54 | void | |
55 | send_msg(int fd, Buffer *m) | |
56 | { | |
57 | int mlen = buffer_len(m); | |
58 | int len; | |
59 | Buffer oqueue; | |
60 | ||
61 | buffer_init(&oqueue); | |
62 | buffer_put_int(&oqueue, mlen); | |
63 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
64 | buffer_consume(m, mlen); | |
65 | ||
66 | len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue)); | |
67 | if (len <= 0) | |
68 | fatal("Couldn't send packet: %s", strerror(errno)); | |
69 | ||
70 | buffer_free(&oqueue); | |
71 | } | |
72 | ||
73 | void | |
74 | get_msg(int fd, Buffer *m) | |
75 | { | |
76 | u_int len, msg_len; | |
77 | unsigned char buf[4096]; | |
78 | ||
79 | len = atomicio(read, fd, buf, 4); | |
80 | if (len == 0) | |
81 | fatal("Connection closed"); | |
82 | else if (len == -1) | |
83 | fatal("Couldn't read packet: %s", strerror(errno)); | |
84 | ||
85 | msg_len = GET_32BIT(buf); | |
86 | if (msg_len > 256 * 1024) | |
87 | fatal("Received message too long %d", msg_len); | |
88 | ||
89 | while (msg_len) { | |
90 | len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf))); | |
91 | if (len == 0) | |
92 | fatal("Connection closed"); | |
93 | else if (len == -1) | |
94 | fatal("Couldn't read packet: %s", strerror(errno)); | |
95 | ||
96 | msg_len -= len; | |
97 | buffer_append(m, buf, len); | |
98 | } | |
99 | } | |
100 | ||
101 | void | |
102 | send_string_request(int fd, u_int id, u_int code, char *s, | |
103 | u_int len) | |
104 | { | |
105 | Buffer msg; | |
106 | ||
107 | buffer_init(&msg); | |
108 | buffer_put_char(&msg, code); | |
109 | buffer_put_int(&msg, id); | |
110 | buffer_put_string(&msg, s, len); | |
111 | send_msg(fd, &msg); | |
112 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
113 | buffer_free(&msg); | |
114 | } | |
115 | ||
116 | void | |
117 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
118 | u_int len, Attrib *a) | |
119 | { | |
120 | Buffer msg; | |
121 | ||
122 | buffer_init(&msg); | |
123 | buffer_put_char(&msg, code); | |
124 | buffer_put_int(&msg, id); | |
125 | buffer_put_string(&msg, s, len); | |
126 | encode_attrib(&msg, a); | |
127 | send_msg(fd, &msg); | |
128 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
129 | buffer_free(&msg); | |
130 | } | |
131 | ||
132 | u_int | |
133 | get_status(int fd, int expected_id) | |
134 | { | |
135 | Buffer msg; | |
136 | u_int type, id, status; | |
137 | ||
138 | buffer_init(&msg); | |
139 | get_msg(fd, &msg); | |
140 | type = buffer_get_char(&msg); | |
141 | id = buffer_get_int(&msg); | |
142 | ||
143 | if (id != expected_id) | |
144 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
145 | if (type != SSH2_FXP_STATUS) | |
146 | fatal("Expected SSH2_FXP_STATUS(%d) packet, got %d", | |
147 | SSH2_FXP_STATUS, type); | |
148 | ||
149 | status = buffer_get_int(&msg); | |
150 | buffer_free(&msg); | |
151 | ||
152 | debug3("SSH2_FXP_STATUS %d", status); | |
153 | ||
154 | return(status); | |
155 | } | |
156 | ||
157 | char * | |
158 | get_handle(int fd, u_int expected_id, u_int *len) | |
159 | { | |
160 | Buffer msg; | |
161 | u_int type, id; | |
162 | char *handle; | |
163 | ||
164 | buffer_init(&msg); | |
165 | get_msg(fd, &msg); | |
166 | type = buffer_get_char(&msg); | |
167 | id = buffer_get_int(&msg); | |
168 | ||
169 | if (id != expected_id) | |
170 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
171 | if (type == SSH2_FXP_STATUS) { | |
172 | int status = buffer_get_int(&msg); | |
173 | ||
174 | error("Couldn't get handle: %s", fx2txt(status)); | |
175 | return(NULL); | |
176 | } else if (type != SSH2_FXP_HANDLE) | |
177 | fatal("Expected SSH2_FXP_HANDLE(%d) packet, got %d", | |
178 | SSH2_FXP_HANDLE, type); | |
179 | ||
180 | handle = buffer_get_string(&msg, len); | |
181 | buffer_free(&msg); | |
182 | ||
183 | return(handle); | |
184 | } | |
185 | ||
186 | Attrib * | |
187 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
188 | { | |
189 | Buffer msg; | |
190 | u_int type, id; | |
191 | Attrib *a; | |
192 | ||
193 | buffer_init(&msg); | |
194 | get_msg(fd, &msg); | |
195 | ||
196 | type = buffer_get_char(&msg); | |
197 | id = buffer_get_int(&msg); | |
198 | ||
199 | debug3("Received stat reply T:%d I:%d", type, id); | |
200 | if (id != expected_id) | |
201 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
202 | if (type == SSH2_FXP_STATUS) { | |
203 | int status = buffer_get_int(&msg); | |
204 | ||
205 | if (quiet) | |
206 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
207 | else | |
208 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
209 | return(NULL); | |
210 | } else if (type != SSH2_FXP_ATTRS) { | |
211 | fatal("Expected SSH2_FXP_ATTRS(%d) packet, got %d", | |
212 | SSH2_FXP_ATTRS, type); | |
213 | } | |
214 | a = decode_attrib(&msg); | |
215 | buffer_free(&msg); | |
216 | ||
217 | return(a); | |
218 | } | |
219 | ||
220 | int | |
221 | do_init(int fd_in, int fd_out) | |
222 | { | |
223 | int type, version; | |
224 | Buffer msg; | |
225 | ||
226 | buffer_init(&msg); | |
227 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
228 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
229 | send_msg(fd_out, &msg); | |
230 | ||
231 | buffer_clear(&msg); | |
232 | ||
233 | get_msg(fd_in, &msg); | |
234 | ||
235 | /* Expecting a VERSION reply */ | |
236 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
237 | error("Invalid packet back from SSH2_FXP_INIT (type %d)", | |
238 | type); | |
239 | buffer_free(&msg); | |
240 | return(-1); | |
241 | } | |
242 | version = buffer_get_int(&msg); | |
243 | ||
244 | debug2("Remote version: %d", version); | |
245 | ||
246 | /* Check for extensions */ | |
247 | while (buffer_len(&msg) > 0) { | |
248 | char *name = buffer_get_string(&msg, NULL); | |
249 | char *value = buffer_get_string(&msg, NULL); | |
250 | ||
251 | debug2("Init extension: \"%s\"", name); | |
252 | xfree(name); | |
253 | xfree(value); | |
254 | } | |
255 | ||
256 | buffer_free(&msg); | |
257 | ||
258 | return(version); | |
259 | } | |
260 | ||
261 | int | |
262 | do_close(int fd_in, int fd_out, char *handle, u_int handle_len) | |
263 | { | |
264 | u_int id, status; | |
265 | Buffer msg; | |
266 | ||
267 | buffer_init(&msg); | |
268 | ||
269 | id = msg_id++; | |
270 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
271 | buffer_put_int(&msg, id); | |
272 | buffer_put_string(&msg, handle, handle_len); | |
273 | send_msg(fd_out, &msg); | |
274 | debug3("Sent message SSH2_FXP_CLOSE I:%d", id); | |
275 | ||
276 | status = get_status(fd_in, id); | |
277 | if (status != SSH2_FX_OK) | |
278 | error("Couldn't close file: %s", fx2txt(status)); | |
279 | ||
280 | buffer_free(&msg); | |
281 | ||
282 | return(status); | |
283 | } | |
284 | ||
285 | ||
286 | int | |
287 | do_lsreaddir(int fd_in, int fd_out, char *path, int printflag, | |
288 | SFTP_DIRENT ***dir) | |
289 | { | |
290 | Buffer msg; | |
291 | u_int type, id, handle_len, i, expected_id, ents = 0; | |
292 | char *handle; | |
293 | ||
294 | id = msg_id++; | |
295 | ||
296 | buffer_init(&msg); | |
297 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
298 | buffer_put_int(&msg, id); | |
299 | buffer_put_cstring(&msg, path); | |
300 | send_msg(fd_out, &msg); | |
301 | ||
302 | buffer_clear(&msg); | |
303 | ||
304 | handle = get_handle(fd_in, id, &handle_len); | |
305 | if (handle == NULL) | |
306 | return(-1); | |
307 | ||
308 | if (dir) { | |
309 | ents = 0; | |
310 | *dir = xmalloc(sizeof(**dir)); | |
311 | (*dir)[0] = NULL; | |
312 | } | |
313 | ||
314 | ||
315 | for(;;) { | |
316 | int count; | |
317 | ||
318 | id = expected_id = msg_id++; | |
319 | ||
320 | debug3("Sending SSH2_FXP_READDIR I:%d", id); | |
321 | ||
322 | buffer_clear(&msg); | |
323 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
324 | buffer_put_int(&msg, id); | |
325 | buffer_put_string(&msg, handle, handle_len); | |
326 | send_msg(fd_out, &msg); | |
327 | ||
328 | buffer_clear(&msg); | |
329 | ||
330 | get_msg(fd_in, &msg); | |
331 | ||
332 | type = buffer_get_char(&msg); | |
333 | id = buffer_get_int(&msg); | |
334 | ||
335 | debug3("Received reply T:%d I:%d", type, id); | |
336 | ||
337 | if (id != expected_id) | |
338 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
339 | ||
340 | if (type == SSH2_FXP_STATUS) { | |
341 | int status = buffer_get_int(&msg); | |
342 | ||
343 | debug3("Received SSH2_FXP_STATUS %d", status); | |
344 | ||
345 | if (status == SSH2_FX_EOF) { | |
346 | break; | |
347 | } else { | |
348 | error("Couldn't read directory: %s", | |
349 | fx2txt(status)); | |
350 | do_close(fd_in, fd_out, handle, handle_len); | |
351 | return(status); | |
352 | } | |
353 | } else if (type != SSH2_FXP_NAME) | |
354 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
355 | SSH2_FXP_NAME, type); | |
356 | ||
357 | count = buffer_get_int(&msg); | |
358 | if (count == 0) | |
359 | break; | |
360 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
361 | for(i = 0; i < count; i++) { | |
362 | char *filename, *longname; | |
363 | Attrib *a; | |
364 | ||
365 | filename = buffer_get_string(&msg, NULL); | |
366 | longname = buffer_get_string(&msg, NULL); | |
367 | a = decode_attrib(&msg); | |
368 | ||
369 | if (printflag) | |
370 | printf("%s\n", longname); | |
371 | ||
372 | if (dir) { | |
373 | *dir = xrealloc(*dir, sizeof(**dir) * | |
374 | (ents + 2)); | |
375 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
376 | (*dir)[ents]->filename = xstrdup(filename); | |
377 | (*dir)[ents]->longname = xstrdup(longname); | |
378 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
379 | (*dir)[++ents] = NULL; | |
380 | } | |
381 | ||
382 | xfree(filename); | |
383 | xfree(longname); | |
384 | } | |
385 | } | |
386 | ||
387 | buffer_free(&msg); | |
388 | do_close(fd_in, fd_out, handle, handle_len); | |
389 | xfree(handle); | |
390 | ||
391 | return(0); | |
392 | } | |
393 | ||
394 | int | |
395 | do_ls(int fd_in, int fd_out, char *path) | |
396 | { | |
397 | return(do_lsreaddir(fd_in, fd_out, path, 1, NULL)); | |
398 | } | |
399 | ||
400 | int | |
401 | do_readdir(int fd_in, int fd_out, char *path, SFTP_DIRENT ***dir) | |
402 | { | |
403 | return(do_lsreaddir(fd_in, fd_out, path, 0, dir)); | |
404 | } | |
405 | ||
406 | void free_sftp_dirents(SFTP_DIRENT **s) | |
407 | { | |
408 | int i; | |
409 | ||
410 | for(i = 0; s[i]; i++) { | |
411 | xfree(s[i]->filename); | |
412 | xfree(s[i]->longname); | |
413 | xfree(s[i]); | |
414 | } | |
415 | xfree(s); | |
416 | } | |
417 | ||
418 | int | |
419 | do_rm(int fd_in, int fd_out, char *path) | |
420 | { | |
421 | u_int status, id; | |
422 | ||
423 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
424 | ||
425 | id = msg_id++; | |
426 | send_string_request(fd_out, id, SSH2_FXP_REMOVE, path, strlen(path)); | |
427 | status = get_status(fd_in, id); | |
428 | if (status != SSH2_FX_OK) | |
429 | error("Couldn't delete file: %s", fx2txt(status)); | |
430 | return(status); | |
431 | } | |
432 | ||
433 | int | |
434 | do_mkdir(int fd_in, int fd_out, char *path, Attrib *a) | |
435 | { | |
436 | u_int status, id; | |
437 | ||
438 | id = msg_id++; | |
439 | send_string_attrs_request(fd_out, id, SSH2_FXP_MKDIR, path, | |
440 | strlen(path), a); | |
441 | ||
442 | status = get_status(fd_in, id); | |
443 | if (status != SSH2_FX_OK) | |
444 | error("Couldn't create directory: %s", fx2txt(status)); | |
445 | ||
446 | return(status); | |
447 | } | |
448 | ||
449 | int | |
450 | do_rmdir(int fd_in, int fd_out, char *path) | |
451 | { | |
452 | u_int status, id; | |
453 | ||
454 | id = msg_id++; | |
455 | send_string_request(fd_out, id, SSH2_FXP_RMDIR, path, strlen(path)); | |
456 | ||
457 | status = get_status(fd_in, id); | |
458 | if (status != SSH2_FX_OK) | |
459 | error("Couldn't remove directory: %s", fx2txt(status)); | |
460 | ||
461 | return(status); | |
462 | } | |
463 | ||
464 | Attrib * | |
465 | do_stat(int fd_in, int fd_out, char *path, int quiet) | |
466 | { | |
467 | u_int id; | |
468 | ||
469 | id = msg_id++; | |
470 | send_string_request(fd_out, id, SSH2_FXP_STAT, path, strlen(path)); | |
471 | return(get_decode_stat(fd_in, id, quiet)); | |
472 | } | |
473 | ||
474 | Attrib * | |
475 | do_lstat(int fd_in, int fd_out, char *path, int quiet) | |
476 | { | |
477 | u_int id; | |
478 | ||
479 | id = msg_id++; | |
480 | send_string_request(fd_out, id, SSH2_FXP_LSTAT, path, strlen(path)); | |
481 | return(get_decode_stat(fd_in, id, quiet)); | |
482 | } | |
483 | ||
484 | Attrib * | |
485 | do_fstat(int fd_in, int fd_out, char *handle, u_int handle_len, int quiet) | |
486 | { | |
487 | u_int id; | |
488 | ||
489 | id = msg_id++; | |
490 | send_string_request(fd_out, id, SSH2_FXP_FSTAT, handle, handle_len); | |
491 | return(get_decode_stat(fd_in, id, quiet)); | |
492 | } | |
493 | ||
494 | int | |
495 | do_setstat(int fd_in, int fd_out, char *path, Attrib *a) | |
496 | { | |
497 | u_int status, id; | |
498 | ||
499 | id = msg_id++; | |
500 | send_string_attrs_request(fd_out, id, SSH2_FXP_SETSTAT, path, | |
501 | strlen(path), a); | |
502 | ||
503 | status = get_status(fd_in, id); | |
504 | if (status != SSH2_FX_OK) | |
505 | error("Couldn't setstat on \"%s\": %s", path, | |
506 | fx2txt(status)); | |
507 | ||
508 | return(status); | |
509 | } | |
510 | ||
511 | int | |
512 | do_fsetstat(int fd_in, int fd_out, char *handle, u_int handle_len, | |
513 | Attrib *a) | |
514 | { | |
515 | u_int status, id; | |
516 | ||
517 | id = msg_id++; | |
518 | send_string_attrs_request(fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
519 | handle_len, a); | |
520 | ||
521 | status = get_status(fd_in, id); | |
522 | if (status != SSH2_FX_OK) | |
523 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
524 | ||
525 | return(status); | |
526 | } | |
527 | ||
528 | char * | |
529 | do_realpath(int fd_in, int fd_out, char *path) | |
530 | { | |
531 | Buffer msg; | |
532 | u_int type, expected_id, count, id; | |
533 | char *filename, *longname; | |
534 | Attrib *a; | |
535 | ||
536 | expected_id = id = msg_id++; | |
537 | send_string_request(fd_out, id, SSH2_FXP_REALPATH, path, strlen(path)); | |
538 | ||
539 | buffer_init(&msg); | |
540 | ||
541 | get_msg(fd_in, &msg); | |
542 | type = buffer_get_char(&msg); | |
543 | id = buffer_get_int(&msg); | |
544 | ||
545 | if (id != expected_id) | |
546 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
547 | ||
548 | if (type == SSH2_FXP_STATUS) { | |
549 | u_int status = buffer_get_int(&msg); | |
550 | ||
551 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
552 | return(NULL); | |
553 | } else if (type != SSH2_FXP_NAME) | |
554 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
555 | SSH2_FXP_NAME, type); | |
556 | ||
557 | count = buffer_get_int(&msg); | |
558 | if (count != 1) | |
559 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
560 | ||
561 | filename = buffer_get_string(&msg, NULL); | |
562 | longname = buffer_get_string(&msg, NULL); | |
563 | a = decode_attrib(&msg); | |
564 | ||
565 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
566 | ||
567 | xfree(longname); | |
568 | ||
569 | buffer_free(&msg); | |
570 | ||
571 | return(filename); | |
572 | } | |
573 | ||
574 | int | |
575 | do_rename(int fd_in, int fd_out, char *oldpath, char *newpath) | |
576 | { | |
577 | Buffer msg; | |
578 | u_int status, id; | |
579 | ||
580 | buffer_init(&msg); | |
581 | ||
582 | /* Send rename request */ | |
583 | id = msg_id++; | |
584 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
585 | buffer_put_int(&msg, id); | |
586 | buffer_put_cstring(&msg, oldpath); | |
587 | buffer_put_cstring(&msg, newpath); | |
588 | send_msg(fd_out, &msg); | |
589 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
590 | newpath); | |
591 | buffer_free(&msg); | |
592 | ||
593 | status = get_status(fd_in, id); | |
594 | if (status != SSH2_FX_OK) | |
595 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
596 | fx2txt(status)); | |
597 | ||
598 | return(status); | |
599 | } | |
600 | ||
601 | int | |
602 | do_symlink(int fd_in, int fd_out, char *oldpath, char *newpath) | |
603 | { | |
604 | Buffer msg; | |
605 | u_int status, id; | |
606 | ||
607 | buffer_init(&msg); | |
608 | ||
609 | /* Send rename request */ | |
610 | id = msg_id++; | |
611 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
612 | buffer_put_int(&msg, id); | |
613 | buffer_put_cstring(&msg, oldpath); | |
614 | buffer_put_cstring(&msg, newpath); | |
615 | send_msg(fd_out, &msg); | |
616 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
617 | newpath); | |
618 | buffer_free(&msg); | |
619 | ||
620 | status = get_status(fd_in, id); | |
621 | if (status != SSH2_FX_OK) | |
622 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
623 | fx2txt(status)); | |
624 | ||
625 | return(status); | |
626 | } | |
627 | ||
628 | char * | |
629 | do_readlink(int fd_in, int fd_out, char *path) | |
630 | { | |
631 | Buffer msg; | |
632 | u_int type, expected_id, count, id; | |
633 | char *filename, *longname; | |
634 | Attrib *a; | |
635 | ||
636 | expected_id = id = msg_id++; | |
637 | send_string_request(fd_out, id, SSH2_FXP_READLINK, path, strlen(path)); | |
638 | ||
639 | buffer_init(&msg); | |
640 | ||
641 | get_msg(fd_in, &msg); | |
642 | type = buffer_get_char(&msg); | |
643 | id = buffer_get_int(&msg); | |
644 | ||
645 | if (id != expected_id) | |
646 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
647 | ||
648 | if (type == SSH2_FXP_STATUS) { | |
649 | u_int status = buffer_get_int(&msg); | |
650 | ||
651 | error("Couldn't readlink: %s", fx2txt(status)); | |
652 | return(NULL); | |
653 | } else if (type != SSH2_FXP_NAME) | |
654 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
655 | SSH2_FXP_NAME, type); | |
656 | ||
657 | count = buffer_get_int(&msg); | |
658 | if (count != 1) | |
659 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
660 | ||
661 | filename = buffer_get_string(&msg, NULL); | |
662 | longname = buffer_get_string(&msg, NULL); | |
663 | a = decode_attrib(&msg); | |
664 | ||
665 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
666 | ||
667 | xfree(longname); | |
668 | ||
669 | buffer_free(&msg); | |
670 | ||
671 | return(filename); | |
672 | } | |
673 | ||
674 | int | |
675 | do_download(int fd_in, int fd_out, char *remote_path, char *local_path, | |
676 | int pflag) | |
677 | { | |
678 | int local_fd; | |
679 | u_int expected_id, handle_len, mode, type, id; | |
680 | u_int64_t offset; | |
681 | char *handle; | |
682 | Buffer msg; | |
683 | Attrib junk, *a; | |
684 | int status; | |
685 | ||
686 | a = do_stat(fd_in, fd_out, remote_path, 0); | |
687 | if (a == NULL) | |
688 | return(-1); | |
689 | ||
690 | /* XXX: should we preserve set[ug]id? */ | |
691 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
692 | mode = S_IWRITE | (a->perm & 0777); | |
693 | else | |
694 | mode = 0666; | |
695 | ||
696 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
697 | (a->perm & S_IFDIR)) { | |
698 | error("Cannot download a directory: %s", remote_path); | |
699 | return(-1); | |
700 | } | |
701 | ||
702 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode); | |
703 | if (local_fd == -1) { | |
704 | error("Couldn't open local file \"%s\" for writing: %s", | |
705 | local_path, strerror(errno)); | |
706 | return(-1); | |
707 | } | |
708 | ||
709 | buffer_init(&msg); | |
710 | ||
711 | /* Send open request */ | |
712 | id = msg_id++; | |
713 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
714 | buffer_put_int(&msg, id); | |
715 | buffer_put_cstring(&msg, remote_path); | |
716 | buffer_put_int(&msg, SSH2_FXF_READ); | |
717 | attrib_clear(&junk); /* Send empty attributes */ | |
718 | encode_attrib(&msg, &junk); | |
719 | send_msg(fd_out, &msg); | |
720 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
721 | ||
722 | handle = get_handle(fd_in, id, &handle_len); | |
723 | if (handle == NULL) { | |
724 | buffer_free(&msg); | |
725 | close(local_fd); | |
726 | return(-1); | |
727 | } | |
728 | ||
729 | /* Read from remote and write to local */ | |
730 | offset = 0; | |
731 | for(;;) { | |
732 | u_int len; | |
733 | char *data; | |
734 | ||
735 | id = expected_id = msg_id++; | |
736 | ||
737 | buffer_clear(&msg); | |
738 | buffer_put_char(&msg, SSH2_FXP_READ); | |
739 | buffer_put_int(&msg, id); | |
740 | buffer_put_string(&msg, handle, handle_len); | |
741 | buffer_put_int64(&msg, offset); | |
742 | buffer_put_int(&msg, COPY_SIZE); | |
743 | send_msg(fd_out, &msg); | |
744 | debug3("Sent message SSH2_FXP_READ I:%d O:%llu S:%u", | |
745 | id, (u_int64_t)offset, COPY_SIZE); | |
746 | ||
747 | buffer_clear(&msg); | |
748 | ||
749 | get_msg(fd_in, &msg); | |
750 | type = buffer_get_char(&msg); | |
751 | id = buffer_get_int(&msg); | |
752 | debug3("Received reply T:%d I:%d", type, id); | |
753 | if (id != expected_id) | |
754 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
755 | if (type == SSH2_FXP_STATUS) { | |
756 | status = buffer_get_int(&msg); | |
757 | ||
758 | if (status == SSH2_FX_EOF) | |
759 | break; | |
760 | else { | |
761 | error("Couldn't read from remote " | |
762 | "file \"%s\" : %s", remote_path, | |
763 | fx2txt(status)); | |
764 | do_close(fd_in, fd_out, handle, handle_len); | |
765 | goto done; | |
766 | } | |
767 | } else if (type != SSH2_FXP_DATA) { | |
768 | fatal("Expected SSH2_FXP_DATA(%d) packet, got %d", | |
769 | SSH2_FXP_DATA, type); | |
770 | } | |
771 | ||
772 | data = buffer_get_string(&msg, &len); | |
773 | if (len > COPY_SIZE) | |
774 | fatal("Received more data than asked for %d > %d", | |
775 | len, COPY_SIZE); | |
776 | ||
777 | debug3("In read loop, got %d offset %llu", len, | |
778 | (u_int64_t)offset); | |
779 | if (atomicio(write, local_fd, data, len) != len) { | |
780 | error("Couldn't write to \"%s\": %s", local_path, | |
781 | strerror(errno)); | |
782 | do_close(fd_in, fd_out, handle, handle_len); | |
783 | status = -1; | |
784 | xfree(data); | |
785 | goto done; | |
786 | } | |
787 | ||
788 | offset += len; | |
789 | xfree(data); | |
790 | } | |
791 | status = do_close(fd_in, fd_out, handle, handle_len); | |
792 | ||
793 | /* Override umask and utimes if asked */ | |
794 | #ifdef HAVE_FCHMOD | |
795 | if (pflag && fchmod(local_fd, mode) == -1) | |
796 | #else | |
797 | if (pflag && chmod(local_path, mode) == -1) | |
798 | #endif /* HAVE_FCHMOD */ | |
799 | error("Couldn't set mode on \"%s\": %s", local_path, | |
800 | strerror(errno)); | |
801 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
802 | struct timeval tv[2]; | |
803 | tv[0].tv_sec = a->atime; | |
804 | tv[1].tv_sec = a->mtime; | |
805 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
806 | if (utimes(local_path, tv) == -1) | |
807 | error("Can't set times on \"%s\": %s", local_path, | |
808 | strerror(errno)); | |
809 | } | |
810 | ||
811 | done: | |
812 | close(local_fd); | |
813 | buffer_free(&msg); | |
814 | xfree(handle); | |
815 | return status; | |
816 | } | |
817 | ||
818 | int | |
819 | do_upload(int fd_in, int fd_out, char *local_path, char *remote_path, | |
820 | int pflag) | |
821 | { | |
822 | int local_fd; | |
823 | u_int handle_len, id; | |
824 | u_int64_t offset; | |
825 | char *handle; | |
826 | Buffer msg; | |
827 | struct stat sb; | |
828 | Attrib a; | |
829 | int status; | |
830 | ||
831 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
832 | error("Couldn't open local file \"%s\" for reading: %s", | |
833 | local_path, strerror(errno)); | |
834 | return(-1); | |
835 | } | |
836 | if (fstat(local_fd, &sb) == -1) { | |
837 | error("Couldn't fstat local file \"%s\": %s", | |
838 | local_path, strerror(errno)); | |
839 | close(local_fd); | |
840 | return(-1); | |
841 | } | |
842 | stat_to_attrib(&sb, &a); | |
843 | ||
844 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
845 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
846 | a.perm &= 0777; | |
847 | if (!pflag) | |
848 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
849 | ||
850 | buffer_init(&msg); | |
851 | ||
852 | /* Send open request */ | |
853 | id = msg_id++; | |
854 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
855 | buffer_put_int(&msg, id); | |
856 | buffer_put_cstring(&msg, remote_path); | |
857 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
858 | encode_attrib(&msg, &a); | |
859 | send_msg(fd_out, &msg); | |
860 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
861 | ||
862 | buffer_clear(&msg); | |
863 | ||
864 | handle = get_handle(fd_in, id, &handle_len); | |
865 | if (handle == NULL) { | |
866 | close(local_fd); | |
867 | buffer_free(&msg); | |
868 | return(-1); | |
869 | } | |
870 | ||
871 | /* Read from local and write to remote */ | |
872 | offset = 0; | |
873 | for(;;) { | |
874 | int len; | |
875 | char data[COPY_SIZE]; | |
876 | ||
877 | /* | |
878 | * Can't use atomicio here because it returns 0 on EOF, thus losing | |
879 | * the last block of the file | |
880 | */ | |
881 | do | |
882 | len = read(local_fd, data, COPY_SIZE); | |
883 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
884 | ||
885 | if (len == -1) | |
886 | fatal("Couldn't read from \"%s\": %s", local_path, | |
887 | strerror(errno)); | |
888 | if (len == 0) | |
889 | break; | |
890 | ||
891 | buffer_clear(&msg); | |
892 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
893 | buffer_put_int(&msg, ++id); | |
894 | buffer_put_string(&msg, handle, handle_len); | |
895 | buffer_put_int64(&msg, offset); | |
896 | buffer_put_string(&msg, data, len); | |
897 | send_msg(fd_out, &msg); | |
898 | debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u", | |
899 | id, (u_int64_t)offset, len); | |
900 | ||
901 | status = get_status(fd_in, id); | |
902 | if (status != SSH2_FX_OK) { | |
903 | error("Couldn't write to remote file \"%s\": %s", | |
904 | remote_path, fx2txt(status)); | |
905 | do_close(fd_in, fd_out, handle, handle_len); | |
906 | close(local_fd); | |
907 | goto done; | |
908 | } | |
909 | debug3("In write loop, got %d offset %llu", len, | |
910 | (u_int64_t)offset); | |
911 | ||
912 | offset += len; | |
913 | } | |
914 | ||
915 | if (close(local_fd) == -1) { | |
916 | error("Couldn't close local file \"%s\": %s", local_path, | |
917 | strerror(errno)); | |
918 | do_close(fd_in, fd_out, handle, handle_len); | |
919 | status = -1; | |
920 | goto done; | |
921 | } | |
922 | ||
923 | /* Override umask and utimes if asked */ | |
924 | if (pflag) | |
925 | do_fsetstat(fd_in, fd_out, handle, handle_len, &a); | |
926 | ||
927 | status = do_close(fd_in, fd_out, handle, handle_len); | |
928 | ||
929 | done: | |
930 | xfree(handle); | |
931 | buffer_free(&msg); | |
932 | return status; | |
933 | } | |
934 |