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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 1.18 2001/07/14 15:10:16 stevesk 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 | /* How much data to read/write at at time during copies */ | |
46 | /* XXX: what should this be? */ | |
47 | #define COPY_SIZE 8192 | |
48 | ||
49 | /* Message ID */ | |
50 | static u_int msg_id = 1; | |
51 | ||
52 | static void | |
53 | send_msg(int fd, Buffer *m) | |
54 | { | |
55 | int mlen = buffer_len(m); | |
56 | int len; | |
57 | Buffer oqueue; | |
58 | ||
59 | buffer_init(&oqueue); | |
60 | buffer_put_int(&oqueue, mlen); | |
61 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
62 | buffer_consume(m, mlen); | |
63 | ||
64 | len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue)); | |
65 | if (len <= 0) | |
66 | fatal("Couldn't send packet: %s", strerror(errno)); | |
67 | ||
68 | buffer_free(&oqueue); | |
69 | } | |
70 | ||
71 | static void | |
72 | get_msg(int fd, Buffer *m) | |
73 | { | |
74 | u_int len, msg_len; | |
75 | unsigned char buf[4096]; | |
76 | ||
77 | len = atomicio(read, fd, buf, 4); | |
78 | if (len == 0) | |
79 | fatal("Connection closed"); | |
80 | else if (len == -1) | |
81 | fatal("Couldn't read packet: %s", strerror(errno)); | |
82 | ||
83 | msg_len = GET_32BIT(buf); | |
84 | if (msg_len > 256 * 1024) | |
85 | fatal("Received message too long %d", msg_len); | |
86 | ||
87 | while (msg_len) { | |
88 | len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf))); | |
89 | if (len == 0) | |
90 | fatal("Connection closed"); | |
91 | else if (len == -1) | |
92 | fatal("Couldn't read packet: %s", strerror(errno)); | |
93 | ||
94 | msg_len -= len; | |
95 | buffer_append(m, buf, len); | |
96 | } | |
97 | } | |
98 | ||
99 | static void | |
100 | send_string_request(int fd, u_int id, u_int code, char *s, | |
101 | u_int len) | |
102 | { | |
103 | Buffer msg; | |
104 | ||
105 | buffer_init(&msg); | |
106 | buffer_put_char(&msg, code); | |
107 | buffer_put_int(&msg, id); | |
108 | buffer_put_string(&msg, s, len); | |
109 | send_msg(fd, &msg); | |
110 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
111 | buffer_free(&msg); | |
112 | } | |
113 | ||
114 | static void | |
115 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
116 | u_int len, Attrib *a) | |
117 | { | |
118 | Buffer msg; | |
119 | ||
120 | buffer_init(&msg); | |
121 | buffer_put_char(&msg, code); | |
122 | buffer_put_int(&msg, id); | |
123 | buffer_put_string(&msg, s, len); | |
124 | encode_attrib(&msg, a); | |
125 | send_msg(fd, &msg); | |
126 | debug3("Sent message fd %d T:%d I:%d", fd, code, id); | |
127 | buffer_free(&msg); | |
128 | } | |
129 | ||
130 | static u_int | |
131 | get_status(int fd, int expected_id) | |
132 | { | |
133 | Buffer msg; | |
134 | u_int type, id, status; | |
135 | ||
136 | buffer_init(&msg); | |
137 | get_msg(fd, &msg); | |
138 | type = buffer_get_char(&msg); | |
139 | id = buffer_get_int(&msg); | |
140 | ||
141 | if (id != expected_id) | |
142 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
143 | if (type != SSH2_FXP_STATUS) | |
144 | fatal("Expected SSH2_FXP_STATUS(%d) packet, got %d", | |
145 | SSH2_FXP_STATUS, type); | |
146 | ||
147 | status = buffer_get_int(&msg); | |
148 | buffer_free(&msg); | |
149 | ||
150 | debug3("SSH2_FXP_STATUS %d", status); | |
151 | ||
152 | return(status); | |
153 | } | |
154 | ||
155 | static char * | |
156 | get_handle(int fd, u_int expected_id, u_int *len) | |
157 | { | |
158 | Buffer msg; | |
159 | u_int type, id; | |
160 | char *handle; | |
161 | ||
162 | buffer_init(&msg); | |
163 | get_msg(fd, &msg); | |
164 | type = buffer_get_char(&msg); | |
165 | id = buffer_get_int(&msg); | |
166 | ||
167 | if (id != expected_id) | |
168 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
169 | if (type == SSH2_FXP_STATUS) { | |
170 | int status = buffer_get_int(&msg); | |
171 | ||
172 | error("Couldn't get handle: %s", fx2txt(status)); | |
173 | return(NULL); | |
174 | } else if (type != SSH2_FXP_HANDLE) | |
175 | fatal("Expected SSH2_FXP_HANDLE(%d) packet, got %d", | |
176 | SSH2_FXP_HANDLE, type); | |
177 | ||
178 | handle = buffer_get_string(&msg, len); | |
179 | buffer_free(&msg); | |
180 | ||
181 | return(handle); | |
182 | } | |
183 | ||
184 | static Attrib * | |
185 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
186 | { | |
187 | Buffer msg; | |
188 | u_int type, id; | |
189 | Attrib *a; | |
190 | ||
191 | buffer_init(&msg); | |
192 | get_msg(fd, &msg); | |
193 | ||
194 | type = buffer_get_char(&msg); | |
195 | id = buffer_get_int(&msg); | |
196 | ||
197 | debug3("Received stat reply T:%d I:%d", type, id); | |
198 | if (id != expected_id) | |
199 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
200 | if (type == SSH2_FXP_STATUS) { | |
201 | int status = buffer_get_int(&msg); | |
202 | ||
203 | if (quiet) | |
204 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
205 | else | |
206 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
207 | return(NULL); | |
208 | } else if (type != SSH2_FXP_ATTRS) { | |
209 | fatal("Expected SSH2_FXP_ATTRS(%d) packet, got %d", | |
210 | SSH2_FXP_ATTRS, type); | |
211 | } | |
212 | a = decode_attrib(&msg); | |
213 | buffer_free(&msg); | |
214 | ||
215 | return(a); | |
216 | } | |
217 | ||
218 | int | |
219 | do_init(int fd_in, int fd_out) | |
220 | { | |
221 | int type, version; | |
222 | Buffer msg; | |
223 | ||
224 | buffer_init(&msg); | |
225 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
226 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
227 | send_msg(fd_out, &msg); | |
228 | ||
229 | buffer_clear(&msg); | |
230 | ||
231 | get_msg(fd_in, &msg); | |
232 | ||
233 | /* Expecting a VERSION reply */ | |
234 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
235 | error("Invalid packet back from SSH2_FXP_INIT (type %d)", | |
236 | type); | |
237 | buffer_free(&msg); | |
238 | return(-1); | |
239 | } | |
240 | version = buffer_get_int(&msg); | |
241 | ||
242 | debug2("Remote version: %d", version); | |
243 | ||
244 | /* Check for extensions */ | |
245 | while (buffer_len(&msg) > 0) { | |
246 | char *name = buffer_get_string(&msg, NULL); | |
247 | char *value = buffer_get_string(&msg, NULL); | |
248 | ||
249 | debug2("Init extension: \"%s\"", name); | |
250 | xfree(name); | |
251 | xfree(value); | |
252 | } | |
253 | ||
254 | buffer_free(&msg); | |
255 | ||
256 | return(version); | |
257 | } | |
258 | ||
259 | int | |
260 | do_close(int fd_in, int fd_out, char *handle, u_int handle_len) | |
261 | { | |
262 | u_int id, status; | |
263 | Buffer msg; | |
264 | ||
265 | buffer_init(&msg); | |
266 | ||
267 | id = msg_id++; | |
268 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
269 | buffer_put_int(&msg, id); | |
270 | buffer_put_string(&msg, handle, handle_len); | |
271 | send_msg(fd_out, &msg); | |
272 | debug3("Sent message SSH2_FXP_CLOSE I:%d", id); | |
273 | ||
274 | status = get_status(fd_in, id); | |
275 | if (status != SSH2_FX_OK) | |
276 | error("Couldn't close file: %s", fx2txt(status)); | |
277 | ||
278 | buffer_free(&msg); | |
279 | ||
280 | return(status); | |
281 | } | |
282 | ||
283 | ||
284 | static int | |
285 | do_lsreaddir(int fd_in, int fd_out, char *path, int printflag, | |
286 | SFTP_DIRENT ***dir) | |
287 | { | |
288 | Buffer msg; | |
289 | u_int type, id, handle_len, i, expected_id, ents = 0; | |
290 | char *handle; | |
291 | ||
292 | id = msg_id++; | |
293 | ||
294 | buffer_init(&msg); | |
295 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
296 | buffer_put_int(&msg, id); | |
297 | buffer_put_cstring(&msg, path); | |
298 | send_msg(fd_out, &msg); | |
299 | ||
300 | buffer_clear(&msg); | |
301 | ||
302 | handle = get_handle(fd_in, id, &handle_len); | |
303 | if (handle == NULL) | |
304 | return(-1); | |
305 | ||
306 | if (dir) { | |
307 | ents = 0; | |
308 | *dir = xmalloc(sizeof(**dir)); | |
309 | (*dir)[0] = NULL; | |
310 | } | |
311 | ||
312 | ||
313 | for(;;) { | |
314 | int count; | |
315 | ||
316 | id = expected_id = msg_id++; | |
317 | ||
318 | debug3("Sending SSH2_FXP_READDIR I:%d", id); | |
319 | ||
320 | buffer_clear(&msg); | |
321 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
322 | buffer_put_int(&msg, id); | |
323 | buffer_put_string(&msg, handle, handle_len); | |
324 | send_msg(fd_out, &msg); | |
325 | ||
326 | buffer_clear(&msg); | |
327 | ||
328 | get_msg(fd_in, &msg); | |
329 | ||
330 | type = buffer_get_char(&msg); | |
331 | id = buffer_get_int(&msg); | |
332 | ||
333 | debug3("Received reply T:%d I:%d", type, id); | |
334 | ||
335 | if (id != expected_id) | |
336 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
337 | ||
338 | if (type == SSH2_FXP_STATUS) { | |
339 | int status = buffer_get_int(&msg); | |
340 | ||
341 | debug3("Received SSH2_FXP_STATUS %d", status); | |
342 | ||
343 | if (status == SSH2_FX_EOF) { | |
344 | break; | |
345 | } else { | |
346 | error("Couldn't read directory: %s", | |
347 | fx2txt(status)); | |
348 | do_close(fd_in, fd_out, handle, handle_len); | |
349 | return(status); | |
350 | } | |
351 | } else if (type != SSH2_FXP_NAME) | |
352 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
353 | SSH2_FXP_NAME, type); | |
354 | ||
355 | count = buffer_get_int(&msg); | |
356 | if (count == 0) | |
357 | break; | |
358 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
359 | for(i = 0; i < count; i++) { | |
360 | char *filename, *longname; | |
361 | Attrib *a; | |
362 | ||
363 | filename = buffer_get_string(&msg, NULL); | |
364 | longname = buffer_get_string(&msg, NULL); | |
365 | a = decode_attrib(&msg); | |
366 | ||
367 | if (printflag) | |
368 | printf("%s\n", longname); | |
369 | ||
370 | if (dir) { | |
371 | *dir = xrealloc(*dir, sizeof(**dir) * | |
372 | (ents + 2)); | |
373 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
374 | (*dir)[ents]->filename = xstrdup(filename); | |
375 | (*dir)[ents]->longname = xstrdup(longname); | |
376 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
377 | (*dir)[++ents] = NULL; | |
378 | } | |
379 | ||
380 | xfree(filename); | |
381 | xfree(longname); | |
382 | } | |
383 | } | |
384 | ||
385 | buffer_free(&msg); | |
386 | do_close(fd_in, fd_out, handle, handle_len); | |
387 | xfree(handle); | |
388 | ||
389 | return(0); | |
390 | } | |
391 | ||
392 | int | |
393 | do_ls(int fd_in, int fd_out, char *path) | |
394 | { | |
395 | return(do_lsreaddir(fd_in, fd_out, path, 1, NULL)); | |
396 | } | |
397 | ||
398 | int | |
399 | do_readdir(int fd_in, int fd_out, char *path, SFTP_DIRENT ***dir) | |
400 | { | |
401 | return(do_lsreaddir(fd_in, fd_out, path, 0, dir)); | |
402 | } | |
403 | ||
404 | void free_sftp_dirents(SFTP_DIRENT **s) | |
405 | { | |
406 | int i; | |
407 | ||
408 | for(i = 0; s[i]; i++) { | |
409 | xfree(s[i]->filename); | |
410 | xfree(s[i]->longname); | |
411 | xfree(s[i]); | |
412 | } | |
413 | xfree(s); | |
414 | } | |
415 | ||
416 | int | |
417 | do_rm(int fd_in, int fd_out, char *path) | |
418 | { | |
419 | u_int status, id; | |
420 | ||
421 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
422 | ||
423 | id = msg_id++; | |
424 | send_string_request(fd_out, id, SSH2_FXP_REMOVE, path, strlen(path)); | |
425 | status = get_status(fd_in, id); | |
426 | if (status != SSH2_FX_OK) | |
427 | error("Couldn't delete file: %s", fx2txt(status)); | |
428 | return(status); | |
429 | } | |
430 | ||
431 | int | |
432 | do_mkdir(int fd_in, int fd_out, char *path, Attrib *a) | |
433 | { | |
434 | u_int status, id; | |
435 | ||
436 | id = msg_id++; | |
437 | send_string_attrs_request(fd_out, id, SSH2_FXP_MKDIR, path, | |
438 | strlen(path), a); | |
439 | ||
440 | status = get_status(fd_in, id); | |
441 | if (status != SSH2_FX_OK) | |
442 | error("Couldn't create directory: %s", fx2txt(status)); | |
443 | ||
444 | return(status); | |
445 | } | |
446 | ||
447 | int | |
448 | do_rmdir(int fd_in, int fd_out, char *path) | |
449 | { | |
450 | u_int status, id; | |
451 | ||
452 | id = msg_id++; | |
453 | send_string_request(fd_out, id, SSH2_FXP_RMDIR, path, strlen(path)); | |
454 | ||
455 | status = get_status(fd_in, id); | |
456 | if (status != SSH2_FX_OK) | |
457 | error("Couldn't remove directory: %s", fx2txt(status)); | |
458 | ||
459 | return(status); | |
460 | } | |
461 | ||
462 | Attrib * | |
463 | do_stat(int fd_in, int fd_out, char *path, int quiet) | |
464 | { | |
465 | u_int id; | |
466 | ||
467 | id = msg_id++; | |
468 | send_string_request(fd_out, id, SSH2_FXP_STAT, path, strlen(path)); | |
469 | return(get_decode_stat(fd_in, id, quiet)); | |
470 | } | |
471 | ||
472 | Attrib * | |
473 | do_lstat(int fd_in, int fd_out, char *path, int quiet) | |
474 | { | |
475 | u_int id; | |
476 | ||
477 | id = msg_id++; | |
478 | send_string_request(fd_out, id, SSH2_FXP_LSTAT, path, strlen(path)); | |
479 | return(get_decode_stat(fd_in, id, quiet)); | |
480 | } | |
481 | ||
482 | Attrib * | |
483 | do_fstat(int fd_in, int fd_out, char *handle, u_int handle_len, int quiet) | |
484 | { | |
485 | u_int id; | |
486 | ||
487 | id = msg_id++; | |
488 | send_string_request(fd_out, id, SSH2_FXP_FSTAT, handle, handle_len); | |
489 | return(get_decode_stat(fd_in, id, quiet)); | |
490 | } | |
491 | ||
492 | int | |
493 | do_setstat(int fd_in, int fd_out, char *path, Attrib *a) | |
494 | { | |
495 | u_int status, id; | |
496 | ||
497 | id = msg_id++; | |
498 | send_string_attrs_request(fd_out, id, SSH2_FXP_SETSTAT, path, | |
499 | strlen(path), a); | |
500 | ||
501 | status = get_status(fd_in, id); | |
502 | if (status != SSH2_FX_OK) | |
503 | error("Couldn't setstat on \"%s\": %s", path, | |
504 | fx2txt(status)); | |
505 | ||
506 | return(status); | |
507 | } | |
508 | ||
509 | int | |
510 | do_fsetstat(int fd_in, int fd_out, char *handle, u_int handle_len, | |
511 | Attrib *a) | |
512 | { | |
513 | u_int status, id; | |
514 | ||
515 | id = msg_id++; | |
516 | send_string_attrs_request(fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
517 | handle_len, a); | |
518 | ||
519 | status = get_status(fd_in, id); | |
520 | if (status != SSH2_FX_OK) | |
521 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
522 | ||
523 | return(status); | |
524 | } | |
525 | ||
526 | char * | |
527 | do_realpath(int fd_in, int fd_out, char *path) | |
528 | { | |
529 | Buffer msg; | |
530 | u_int type, expected_id, count, id; | |
531 | char *filename, *longname; | |
532 | Attrib *a; | |
533 | ||
534 | expected_id = id = msg_id++; | |
535 | send_string_request(fd_out, id, SSH2_FXP_REALPATH, path, strlen(path)); | |
536 | ||
537 | buffer_init(&msg); | |
538 | ||
539 | get_msg(fd_in, &msg); | |
540 | type = buffer_get_char(&msg); | |
541 | id = buffer_get_int(&msg); | |
542 | ||
543 | if (id != expected_id) | |
544 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
545 | ||
546 | if (type == SSH2_FXP_STATUS) { | |
547 | u_int status = buffer_get_int(&msg); | |
548 | ||
549 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
550 | return(NULL); | |
551 | } else if (type != SSH2_FXP_NAME) | |
552 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
553 | SSH2_FXP_NAME, type); | |
554 | ||
555 | count = buffer_get_int(&msg); | |
556 | if (count != 1) | |
557 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
558 | ||
559 | filename = buffer_get_string(&msg, NULL); | |
560 | longname = buffer_get_string(&msg, NULL); | |
561 | a = decode_attrib(&msg); | |
562 | ||
563 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
564 | ||
565 | xfree(longname); | |
566 | ||
567 | buffer_free(&msg); | |
568 | ||
569 | return(filename); | |
570 | } | |
571 | ||
572 | int | |
573 | do_rename(int fd_in, int fd_out, char *oldpath, char *newpath) | |
574 | { | |
575 | Buffer msg; | |
576 | u_int status, id; | |
577 | ||
578 | buffer_init(&msg); | |
579 | ||
580 | /* Send rename request */ | |
581 | id = msg_id++; | |
582 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
583 | buffer_put_int(&msg, id); | |
584 | buffer_put_cstring(&msg, oldpath); | |
585 | buffer_put_cstring(&msg, newpath); | |
586 | send_msg(fd_out, &msg); | |
587 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
588 | newpath); | |
589 | buffer_free(&msg); | |
590 | ||
591 | status = get_status(fd_in, id); | |
592 | if (status != SSH2_FX_OK) | |
593 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
594 | fx2txt(status)); | |
595 | ||
596 | return(status); | |
597 | } | |
598 | ||
599 | int | |
600 | do_symlink(int fd_in, int fd_out, char *oldpath, char *newpath) | |
601 | { | |
602 | Buffer msg; | |
603 | u_int status, id; | |
604 | ||
605 | buffer_init(&msg); | |
606 | ||
607 | /* Send rename request */ | |
608 | id = msg_id++; | |
609 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
610 | buffer_put_int(&msg, id); | |
611 | buffer_put_cstring(&msg, oldpath); | |
612 | buffer_put_cstring(&msg, newpath); | |
613 | send_msg(fd_out, &msg); | |
614 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
615 | newpath); | |
616 | buffer_free(&msg); | |
617 | ||
618 | status = get_status(fd_in, id); | |
619 | if (status != SSH2_FX_OK) | |
620 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, newpath, | |
621 | fx2txt(status)); | |
622 | ||
623 | return(status); | |
624 | } | |
625 | ||
626 | char * | |
627 | do_readlink(int fd_in, int fd_out, char *path) | |
628 | { | |
629 | Buffer msg; | |
630 | u_int type, expected_id, count, id; | |
631 | char *filename, *longname; | |
632 | Attrib *a; | |
633 | ||
634 | expected_id = id = msg_id++; | |
635 | send_string_request(fd_out, id, SSH2_FXP_READLINK, path, strlen(path)); | |
636 | ||
637 | buffer_init(&msg); | |
638 | ||
639 | get_msg(fd_in, &msg); | |
640 | type = buffer_get_char(&msg); | |
641 | id = buffer_get_int(&msg); | |
642 | ||
643 | if (id != expected_id) | |
644 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
645 | ||
646 | if (type == SSH2_FXP_STATUS) { | |
647 | u_int status = buffer_get_int(&msg); | |
648 | ||
649 | error("Couldn't readlink: %s", fx2txt(status)); | |
650 | return(NULL); | |
651 | } else if (type != SSH2_FXP_NAME) | |
652 | fatal("Expected SSH2_FXP_NAME(%d) packet, got %d", | |
653 | SSH2_FXP_NAME, type); | |
654 | ||
655 | count = buffer_get_int(&msg); | |
656 | if (count != 1) | |
657 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
658 | ||
659 | filename = buffer_get_string(&msg, NULL); | |
660 | longname = buffer_get_string(&msg, NULL); | |
661 | a = decode_attrib(&msg); | |
662 | ||
663 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
664 | ||
665 | xfree(longname); | |
666 | ||
667 | buffer_free(&msg); | |
668 | ||
669 | return(filename); | |
670 | } | |
671 | ||
672 | int | |
673 | do_download(int fd_in, int fd_out, char *remote_path, char *local_path, | |
674 | int pflag) | |
675 | { | |
676 | int local_fd; | |
677 | u_int expected_id, handle_len, mode, type, id; | |
678 | u_int64_t offset; | |
679 | char *handle; | |
680 | Buffer msg; | |
681 | Attrib junk, *a; | |
682 | int status; | |
683 | ||
684 | a = do_stat(fd_in, fd_out, remote_path, 0); | |
685 | if (a == NULL) | |
686 | return(-1); | |
687 | ||
688 | /* XXX: should we preserve set[ug]id? */ | |
689 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
690 | mode = S_IWRITE | (a->perm & 0777); | |
691 | else | |
692 | mode = 0666; | |
693 | ||
694 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
695 | (a->perm & S_IFDIR)) { | |
696 | error("Cannot download a directory: %s", remote_path); | |
697 | return(-1); | |
698 | } | |
699 | ||
700 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode); | |
701 | if (local_fd == -1) { | |
702 | error("Couldn't open local file \"%s\" for writing: %s", | |
703 | local_path, strerror(errno)); | |
704 | return(-1); | |
705 | } | |
706 | ||
707 | buffer_init(&msg); | |
708 | ||
709 | /* Send open request */ | |
710 | id = msg_id++; | |
711 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
712 | buffer_put_int(&msg, id); | |
713 | buffer_put_cstring(&msg, remote_path); | |
714 | buffer_put_int(&msg, SSH2_FXF_READ); | |
715 | attrib_clear(&junk); /* Send empty attributes */ | |
716 | encode_attrib(&msg, &junk); | |
717 | send_msg(fd_out, &msg); | |
718 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
719 | ||
720 | handle = get_handle(fd_in, id, &handle_len); | |
721 | if (handle == NULL) { | |
722 | buffer_free(&msg); | |
723 | close(local_fd); | |
724 | return(-1); | |
725 | } | |
726 | ||
727 | /* Read from remote and write to local */ | |
728 | offset = 0; | |
729 | for(;;) { | |
730 | u_int len; | |
731 | char *data; | |
732 | ||
733 | id = expected_id = msg_id++; | |
734 | ||
735 | buffer_clear(&msg); | |
736 | buffer_put_char(&msg, SSH2_FXP_READ); | |
737 | buffer_put_int(&msg, id); | |
738 | buffer_put_string(&msg, handle, handle_len); | |
739 | buffer_put_int64(&msg, offset); | |
740 | buffer_put_int(&msg, COPY_SIZE); | |
741 | send_msg(fd_out, &msg); | |
742 | debug3("Sent message SSH2_FXP_READ I:%d O:%llu S:%u", | |
743 | id, (u_int64_t)offset, COPY_SIZE); | |
744 | ||
745 | buffer_clear(&msg); | |
746 | ||
747 | get_msg(fd_in, &msg); | |
748 | type = buffer_get_char(&msg); | |
749 | id = buffer_get_int(&msg); | |
750 | debug3("Received reply T:%d I:%d", type, id); | |
751 | if (id != expected_id) | |
752 | fatal("ID mismatch (%d != %d)", id, expected_id); | |
753 | if (type == SSH2_FXP_STATUS) { | |
754 | status = buffer_get_int(&msg); | |
755 | ||
756 | if (status == SSH2_FX_EOF) | |
757 | break; | |
758 | else { | |
759 | error("Couldn't read from remote " | |
760 | "file \"%s\" : %s", remote_path, | |
761 | fx2txt(status)); | |
762 | do_close(fd_in, fd_out, handle, handle_len); | |
763 | goto done; | |
764 | } | |
765 | } else if (type != SSH2_FXP_DATA) { | |
766 | fatal("Expected SSH2_FXP_DATA(%d) packet, got %d", | |
767 | SSH2_FXP_DATA, type); | |
768 | } | |
769 | ||
770 | data = buffer_get_string(&msg, &len); | |
771 | if (len > COPY_SIZE) | |
772 | fatal("Received more data than asked for %d > %d", | |
773 | len, COPY_SIZE); | |
774 | ||
775 | debug3("In read loop, got %d offset %llu", len, | |
776 | (u_int64_t)offset); | |
777 | if (atomicio(write, local_fd, data, len) != len) { | |
778 | error("Couldn't write to \"%s\": %s", local_path, | |
779 | strerror(errno)); | |
780 | do_close(fd_in, fd_out, handle, handle_len); | |
781 | status = -1; | |
782 | xfree(data); | |
783 | goto done; | |
784 | } | |
785 | ||
786 | offset += len; | |
787 | xfree(data); | |
788 | } | |
789 | status = do_close(fd_in, fd_out, handle, handle_len); | |
790 | ||
791 | /* Override umask and utimes if asked */ | |
792 | #ifdef HAVE_FCHMOD | |
793 | if (pflag && fchmod(local_fd, mode) == -1) | |
794 | #else | |
795 | if (pflag && chmod(local_path, mode) == -1) | |
796 | #endif /* HAVE_FCHMOD */ | |
797 | error("Couldn't set mode on \"%s\": %s", local_path, | |
798 | strerror(errno)); | |
799 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
800 | struct timeval tv[2]; | |
801 | tv[0].tv_sec = a->atime; | |
802 | tv[1].tv_sec = a->mtime; | |
803 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
804 | if (utimes(local_path, tv) == -1) | |
805 | error("Can't set times on \"%s\": %s", local_path, | |
806 | strerror(errno)); | |
807 | } | |
808 | ||
809 | done: | |
810 | close(local_fd); | |
811 | buffer_free(&msg); | |
812 | xfree(handle); | |
813 | return status; | |
814 | } | |
815 | ||
816 | int | |
817 | do_upload(int fd_in, int fd_out, char *local_path, char *remote_path, | |
818 | int pflag) | |
819 | { | |
820 | int local_fd; | |
821 | u_int handle_len, id; | |
822 | u_int64_t offset; | |
823 | char *handle; | |
824 | Buffer msg; | |
825 | struct stat sb; | |
826 | Attrib a; | |
827 | int status; | |
828 | ||
829 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
830 | error("Couldn't open local file \"%s\" for reading: %s", | |
831 | local_path, strerror(errno)); | |
832 | return(-1); | |
833 | } | |
834 | if (fstat(local_fd, &sb) == -1) { | |
835 | error("Couldn't fstat local file \"%s\": %s", | |
836 | local_path, strerror(errno)); | |
837 | close(local_fd); | |
838 | return(-1); | |
839 | } | |
840 | stat_to_attrib(&sb, &a); | |
841 | ||
842 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
843 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
844 | a.perm &= 0777; | |
845 | if (!pflag) | |
846 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
847 | ||
848 | buffer_init(&msg); | |
849 | ||
850 | /* Send open request */ | |
851 | id = msg_id++; | |
852 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
853 | buffer_put_int(&msg, id); | |
854 | buffer_put_cstring(&msg, remote_path); | |
855 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
856 | encode_attrib(&msg, &a); | |
857 | send_msg(fd_out, &msg); | |
858 | debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path); | |
859 | ||
860 | buffer_clear(&msg); | |
861 | ||
862 | handle = get_handle(fd_in, id, &handle_len); | |
863 | if (handle == NULL) { | |
864 | close(local_fd); | |
865 | buffer_free(&msg); | |
866 | return(-1); | |
867 | } | |
868 | ||
869 | /* Read from local and write to remote */ | |
870 | offset = 0; | |
871 | for(;;) { | |
872 | int len; | |
873 | char data[COPY_SIZE]; | |
874 | ||
875 | /* | |
876 | * Can't use atomicio here because it returns 0 on EOF, thus losing | |
877 | * the last block of the file | |
878 | */ | |
879 | do | |
880 | len = read(local_fd, data, COPY_SIZE); | |
881 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
882 | ||
883 | if (len == -1) | |
884 | fatal("Couldn't read from \"%s\": %s", local_path, | |
885 | strerror(errno)); | |
886 | if (len == 0) | |
887 | break; | |
888 | ||
889 | buffer_clear(&msg); | |
890 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
891 | buffer_put_int(&msg, ++id); | |
892 | buffer_put_string(&msg, handle, handle_len); | |
893 | buffer_put_int64(&msg, offset); | |
894 | buffer_put_string(&msg, data, len); | |
895 | send_msg(fd_out, &msg); | |
896 | debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u", | |
897 | id, (u_int64_t)offset, len); | |
898 | ||
899 | status = get_status(fd_in, id); | |
900 | if (status != SSH2_FX_OK) { | |
901 | error("Couldn't write to remote file \"%s\": %s", | |
902 | remote_path, fx2txt(status)); | |
903 | do_close(fd_in, fd_out, handle, handle_len); | |
904 | close(local_fd); | |
905 | goto done; | |
906 | } | |
907 | debug3("In write loop, got %d offset %llu", len, | |
908 | (u_int64_t)offset); | |
909 | ||
910 | offset += len; | |
911 | } | |
912 | ||
913 | if (close(local_fd) == -1) { | |
914 | error("Couldn't close local file \"%s\": %s", local_path, | |
915 | strerror(errno)); | |
916 | do_close(fd_in, fd_out, handle, handle_len); | |
917 | status = -1; | |
918 | goto done; | |
919 | } | |
920 | ||
921 | /* Override umask and utimes if asked */ | |
922 | if (pflag) | |
923 | do_fsetstat(fd_in, fd_out, handle, handle_len, &a); | |
924 | ||
925 | status = do_close(fd_in, fd_out, handle, handle_len); | |
926 | ||
927 | done: | |
928 | xfree(handle); | |
929 | buffer_free(&msg); | |
930 | return status; | |
931 | } | |
932 |