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1 | /* | |
2 | * Copyright (c) 2001-2003 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: remove all logging, only return status codes */ | |
28 | /* XXX: copy between two remote sites */ | |
29 | ||
30 | #include "includes.h" | |
31 | RCSID("$OpenBSD: sftp-client.c,v 1.42 2003/03/05 22:33:43 markus Exp $"); | |
32 | ||
33 | #include "openbsd-compat/sys-queue.h" | |
34 | ||
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 "progressmeter.h" | |
42 | ||
43 | #include "sftp.h" | |
44 | #include "sftp-common.h" | |
45 | #include "sftp-client.h" | |
46 | ||
47 | extern int showprogress; | |
48 | ||
49 | /* Minimum amount of data to read at at time */ | |
50 | #define MIN_READ_SIZE 512 | |
51 | ||
52 | /* Maximum packet size */ | |
53 | #define MAX_MSG_LENGTH (256 * 1024) | |
54 | ||
55 | struct sftp_conn { | |
56 | int fd_in; | |
57 | int fd_out; | |
58 | u_int transfer_buflen; | |
59 | u_int num_requests; | |
60 | u_int version; | |
61 | u_int msg_id; | |
62 | }; | |
63 | ||
64 | static void | |
65 | send_msg(int fd, Buffer *m) | |
66 | { | |
67 | u_char mlen[4]; | |
68 | ||
69 | if (buffer_len(m) > MAX_MSG_LENGTH) | |
70 | fatal("Outbound message too long %u", buffer_len(m)); | |
71 | ||
72 | /* Send length first */ | |
73 | PUT_32BIT(mlen, buffer_len(m)); | |
74 | if (atomicio(write, fd, mlen, sizeof(mlen)) <= 0) | |
75 | fatal("Couldn't send packet: %s", strerror(errno)); | |
76 | ||
77 | if (atomicio(write, fd, buffer_ptr(m), buffer_len(m)) <= 0) | |
78 | fatal("Couldn't send packet: %s", strerror(errno)); | |
79 | ||
80 | buffer_clear(m); | |
81 | } | |
82 | ||
83 | static void | |
84 | get_msg(int fd, Buffer *m) | |
85 | { | |
86 | ssize_t len; | |
87 | u_int msg_len; | |
88 | ||
89 | buffer_append_space(m, 4); | |
90 | len = atomicio(read, fd, buffer_ptr(m), 4); | |
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 = buffer_get_int(m); | |
97 | if (msg_len > MAX_MSG_LENGTH) | |
98 | fatal("Received message too long %u", msg_len); | |
99 | ||
100 | buffer_append_space(m, msg_len); | |
101 | len = atomicio(read, fd, buffer_ptr(m), msg_len); | |
102 | if (len == 0) | |
103 | fatal("Connection closed"); | |
104 | else if (len == -1) | |
105 | fatal("Read packet: %s", strerror(errno)); | |
106 | } | |
107 | ||
108 | static void | |
109 | send_string_request(int fd, u_int id, u_int code, char *s, | |
110 | u_int len) | |
111 | { | |
112 | Buffer msg; | |
113 | ||
114 | buffer_init(&msg); | |
115 | buffer_put_char(&msg, code); | |
116 | buffer_put_int(&msg, id); | |
117 | buffer_put_string(&msg, s, len); | |
118 | send_msg(fd, &msg); | |
119 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
120 | buffer_free(&msg); | |
121 | } | |
122 | ||
123 | static void | |
124 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
125 | u_int len, Attrib *a) | |
126 | { | |
127 | Buffer msg; | |
128 | ||
129 | buffer_init(&msg); | |
130 | buffer_put_char(&msg, code); | |
131 | buffer_put_int(&msg, id); | |
132 | buffer_put_string(&msg, s, len); | |
133 | encode_attrib(&msg, a); | |
134 | send_msg(fd, &msg); | |
135 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
136 | buffer_free(&msg); | |
137 | } | |
138 | ||
139 | static u_int | |
140 | get_status(int fd, u_int expected_id) | |
141 | { | |
142 | Buffer msg; | |
143 | u_int type, id, status; | |
144 | ||
145 | buffer_init(&msg); | |
146 | get_msg(fd, &msg); | |
147 | type = buffer_get_char(&msg); | |
148 | id = buffer_get_int(&msg); | |
149 | ||
150 | if (id != expected_id) | |
151 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
152 | if (type != SSH2_FXP_STATUS) | |
153 | fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", | |
154 | SSH2_FXP_STATUS, type); | |
155 | ||
156 | status = buffer_get_int(&msg); | |
157 | buffer_free(&msg); | |
158 | ||
159 | debug3("SSH2_FXP_STATUS %u", status); | |
160 | ||
161 | return(status); | |
162 | } | |
163 | ||
164 | static char * | |
165 | get_handle(int fd, u_int expected_id, u_int *len) | |
166 | { | |
167 | Buffer msg; | |
168 | u_int type, id; | |
169 | char *handle; | |
170 | ||
171 | buffer_init(&msg); | |
172 | get_msg(fd, &msg); | |
173 | type = buffer_get_char(&msg); | |
174 | id = buffer_get_int(&msg); | |
175 | ||
176 | if (id != expected_id) | |
177 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
178 | if (type == SSH2_FXP_STATUS) { | |
179 | int status = buffer_get_int(&msg); | |
180 | ||
181 | error("Couldn't get handle: %s", fx2txt(status)); | |
182 | return(NULL); | |
183 | } else if (type != SSH2_FXP_HANDLE) | |
184 | fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u", | |
185 | SSH2_FXP_HANDLE, type); | |
186 | ||
187 | handle = buffer_get_string(&msg, len); | |
188 | buffer_free(&msg); | |
189 | ||
190 | return(handle); | |
191 | } | |
192 | ||
193 | static Attrib * | |
194 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
195 | { | |
196 | Buffer msg; | |
197 | u_int type, id; | |
198 | Attrib *a; | |
199 | ||
200 | buffer_init(&msg); | |
201 | get_msg(fd, &msg); | |
202 | ||
203 | type = buffer_get_char(&msg); | |
204 | id = buffer_get_int(&msg); | |
205 | ||
206 | debug3("Received stat reply T:%u I:%u", type, id); | |
207 | if (id != expected_id) | |
208 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
209 | if (type == SSH2_FXP_STATUS) { | |
210 | int status = buffer_get_int(&msg); | |
211 | ||
212 | if (quiet) | |
213 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
214 | else | |
215 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
216 | return(NULL); | |
217 | } else if (type != SSH2_FXP_ATTRS) { | |
218 | fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", | |
219 | SSH2_FXP_ATTRS, type); | |
220 | } | |
221 | a = decode_attrib(&msg); | |
222 | buffer_free(&msg); | |
223 | ||
224 | return(a); | |
225 | } | |
226 | ||
227 | struct sftp_conn * | |
228 | do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests) | |
229 | { | |
230 | u_int type; | |
231 | int version; | |
232 | Buffer msg; | |
233 | struct sftp_conn *ret; | |
234 | ||
235 | buffer_init(&msg); | |
236 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
237 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
238 | send_msg(fd_out, &msg); | |
239 | ||
240 | buffer_clear(&msg); | |
241 | ||
242 | get_msg(fd_in, &msg); | |
243 | ||
244 | /* Expecting a VERSION reply */ | |
245 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
246 | error("Invalid packet back from SSH2_FXP_INIT (type %u)", | |
247 | type); | |
248 | buffer_free(&msg); | |
249 | return(NULL); | |
250 | } | |
251 | version = buffer_get_int(&msg); | |
252 | ||
253 | debug2("Remote version: %d", version); | |
254 | ||
255 | /* Check for extensions */ | |
256 | while (buffer_len(&msg) > 0) { | |
257 | char *name = buffer_get_string(&msg, NULL); | |
258 | char *value = buffer_get_string(&msg, NULL); | |
259 | ||
260 | debug2("Init extension: \"%s\"", name); | |
261 | xfree(name); | |
262 | xfree(value); | |
263 | } | |
264 | ||
265 | buffer_free(&msg); | |
266 | ||
267 | ret = xmalloc(sizeof(*ret)); | |
268 | ret->fd_in = fd_in; | |
269 | ret->fd_out = fd_out; | |
270 | ret->transfer_buflen = transfer_buflen; | |
271 | ret->num_requests = num_requests; | |
272 | ret->version = version; | |
273 | ret->msg_id = 1; | |
274 | ||
275 | /* Some filexfer v.0 servers don't support large packets */ | |
276 | if (version == 0) | |
277 | ret->transfer_buflen = MIN(ret->transfer_buflen, 20480); | |
278 | ||
279 | return(ret); | |
280 | } | |
281 | ||
282 | u_int | |
283 | sftp_proto_version(struct sftp_conn *conn) | |
284 | { | |
285 | return(conn->version); | |
286 | } | |
287 | ||
288 | int | |
289 | do_close(struct sftp_conn *conn, char *handle, u_int handle_len) | |
290 | { | |
291 | u_int id, status; | |
292 | Buffer msg; | |
293 | ||
294 | buffer_init(&msg); | |
295 | ||
296 | id = conn->msg_id++; | |
297 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
298 | buffer_put_int(&msg, id); | |
299 | buffer_put_string(&msg, handle, handle_len); | |
300 | send_msg(conn->fd_out, &msg); | |
301 | debug3("Sent message SSH2_FXP_CLOSE I:%u", id); | |
302 | ||
303 | status = get_status(conn->fd_in, id); | |
304 | if (status != SSH2_FX_OK) | |
305 | error("Couldn't close file: %s", fx2txt(status)); | |
306 | ||
307 | buffer_free(&msg); | |
308 | ||
309 | return(status); | |
310 | } | |
311 | ||
312 | ||
313 | static int | |
314 | do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, | |
315 | SFTP_DIRENT ***dir) | |
316 | { | |
317 | Buffer msg; | |
318 | u_int type, id, handle_len, i, expected_id, ents = 0; | |
319 | char *handle; | |
320 | ||
321 | id = conn->msg_id++; | |
322 | ||
323 | buffer_init(&msg); | |
324 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
325 | buffer_put_int(&msg, id); | |
326 | buffer_put_cstring(&msg, path); | |
327 | send_msg(conn->fd_out, &msg); | |
328 | ||
329 | buffer_clear(&msg); | |
330 | ||
331 | handle = get_handle(conn->fd_in, id, &handle_len); | |
332 | if (handle == NULL) | |
333 | return(-1); | |
334 | ||
335 | if (dir) { | |
336 | ents = 0; | |
337 | *dir = xmalloc(sizeof(**dir)); | |
338 | (*dir)[0] = NULL; | |
339 | } | |
340 | ||
341 | for (;;) { | |
342 | int count; | |
343 | ||
344 | id = expected_id = conn->msg_id++; | |
345 | ||
346 | debug3("Sending SSH2_FXP_READDIR I:%u", id); | |
347 | ||
348 | buffer_clear(&msg); | |
349 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
350 | buffer_put_int(&msg, id); | |
351 | buffer_put_string(&msg, handle, handle_len); | |
352 | send_msg(conn->fd_out, &msg); | |
353 | ||
354 | buffer_clear(&msg); | |
355 | ||
356 | get_msg(conn->fd_in, &msg); | |
357 | ||
358 | type = buffer_get_char(&msg); | |
359 | id = buffer_get_int(&msg); | |
360 | ||
361 | debug3("Received reply T:%u I:%u", type, id); | |
362 | ||
363 | if (id != expected_id) | |
364 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
365 | ||
366 | if (type == SSH2_FXP_STATUS) { | |
367 | int status = buffer_get_int(&msg); | |
368 | ||
369 | debug3("Received SSH2_FXP_STATUS %d", status); | |
370 | ||
371 | if (status == SSH2_FX_EOF) { | |
372 | break; | |
373 | } else { | |
374 | error("Couldn't read directory: %s", | |
375 | fx2txt(status)); | |
376 | do_close(conn, handle, handle_len); | |
377 | xfree(handle); | |
378 | return(status); | |
379 | } | |
380 | } else if (type != SSH2_FXP_NAME) | |
381 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
382 | SSH2_FXP_NAME, type); | |
383 | ||
384 | count = buffer_get_int(&msg); | |
385 | if (count == 0) | |
386 | break; | |
387 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
388 | for (i = 0; i < count; i++) { | |
389 | char *filename, *longname; | |
390 | Attrib *a; | |
391 | ||
392 | filename = buffer_get_string(&msg, NULL); | |
393 | longname = buffer_get_string(&msg, NULL); | |
394 | a = decode_attrib(&msg); | |
395 | ||
396 | if (printflag) | |
397 | printf("%s\n", longname); | |
398 | ||
399 | if (dir) { | |
400 | *dir = xrealloc(*dir, sizeof(**dir) * | |
401 | (ents + 2)); | |
402 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
403 | (*dir)[ents]->filename = xstrdup(filename); | |
404 | (*dir)[ents]->longname = xstrdup(longname); | |
405 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
406 | (*dir)[++ents] = NULL; | |
407 | } | |
408 | ||
409 | xfree(filename); | |
410 | xfree(longname); | |
411 | } | |
412 | } | |
413 | ||
414 | buffer_free(&msg); | |
415 | do_close(conn, handle, handle_len); | |
416 | xfree(handle); | |
417 | ||
418 | return(0); | |
419 | } | |
420 | ||
421 | int | |
422 | do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) | |
423 | { | |
424 | return(do_lsreaddir(conn, path, 0, dir)); | |
425 | } | |
426 | ||
427 | void free_sftp_dirents(SFTP_DIRENT **s) | |
428 | { | |
429 | int i; | |
430 | ||
431 | for (i = 0; s[i]; i++) { | |
432 | xfree(s[i]->filename); | |
433 | xfree(s[i]->longname); | |
434 | xfree(s[i]); | |
435 | } | |
436 | xfree(s); | |
437 | } | |
438 | ||
439 | int | |
440 | do_rm(struct sftp_conn *conn, char *path) | |
441 | { | |
442 | u_int status, id; | |
443 | ||
444 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
445 | ||
446 | id = conn->msg_id++; | |
447 | send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path, | |
448 | strlen(path)); | |
449 | status = get_status(conn->fd_in, id); | |
450 | if (status != SSH2_FX_OK) | |
451 | error("Couldn't delete file: %s", fx2txt(status)); | |
452 | return(status); | |
453 | } | |
454 | ||
455 | int | |
456 | do_mkdir(struct sftp_conn *conn, char *path, Attrib *a) | |
457 | { | |
458 | u_int status, id; | |
459 | ||
460 | id = conn->msg_id++; | |
461 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path, | |
462 | strlen(path), a); | |
463 | ||
464 | status = get_status(conn->fd_in, id); | |
465 | if (status != SSH2_FX_OK) | |
466 | error("Couldn't create directory: %s", fx2txt(status)); | |
467 | ||
468 | return(status); | |
469 | } | |
470 | ||
471 | int | |
472 | do_rmdir(struct sftp_conn *conn, char *path) | |
473 | { | |
474 | u_int status, id; | |
475 | ||
476 | id = conn->msg_id++; | |
477 | send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path, | |
478 | strlen(path)); | |
479 | ||
480 | status = get_status(conn->fd_in, id); | |
481 | if (status != SSH2_FX_OK) | |
482 | error("Couldn't remove directory: %s", fx2txt(status)); | |
483 | ||
484 | return(status); | |
485 | } | |
486 | ||
487 | Attrib * | |
488 | do_stat(struct sftp_conn *conn, char *path, int quiet) | |
489 | { | |
490 | u_int id; | |
491 | ||
492 | id = conn->msg_id++; | |
493 | ||
494 | send_string_request(conn->fd_out, id, | |
495 | conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT, | |
496 | path, strlen(path)); | |
497 | ||
498 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
499 | } | |
500 | ||
501 | Attrib * | |
502 | do_lstat(struct sftp_conn *conn, char *path, int quiet) | |
503 | { | |
504 | u_int id; | |
505 | ||
506 | if (conn->version == 0) { | |
507 | if (quiet) | |
508 | debug("Server version does not support lstat operation"); | |
509 | else | |
510 | log("Server version does not support lstat operation"); | |
511 | return(do_stat(conn, path, quiet)); | |
512 | } | |
513 | ||
514 | id = conn->msg_id++; | |
515 | send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path, | |
516 | strlen(path)); | |
517 | ||
518 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
519 | } | |
520 | ||
521 | Attrib * | |
522 | do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) | |
523 | { | |
524 | u_int id; | |
525 | ||
526 | id = conn->msg_id++; | |
527 | send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle, | |
528 | handle_len); | |
529 | ||
530 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
531 | } | |
532 | ||
533 | int | |
534 | do_setstat(struct sftp_conn *conn, char *path, Attrib *a) | |
535 | { | |
536 | u_int status, id; | |
537 | ||
538 | id = conn->msg_id++; | |
539 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path, | |
540 | strlen(path), a); | |
541 | ||
542 | status = get_status(conn->fd_in, id); | |
543 | if (status != SSH2_FX_OK) | |
544 | error("Couldn't setstat on \"%s\": %s", path, | |
545 | fx2txt(status)); | |
546 | ||
547 | return(status); | |
548 | } | |
549 | ||
550 | int | |
551 | do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, | |
552 | Attrib *a) | |
553 | { | |
554 | u_int status, id; | |
555 | ||
556 | id = conn->msg_id++; | |
557 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
558 | handle_len, a); | |
559 | ||
560 | status = get_status(conn->fd_in, id); | |
561 | if (status != SSH2_FX_OK) | |
562 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
563 | ||
564 | return(status); | |
565 | } | |
566 | ||
567 | char * | |
568 | do_realpath(struct sftp_conn *conn, char *path) | |
569 | { | |
570 | Buffer msg; | |
571 | u_int type, expected_id, count, id; | |
572 | char *filename, *longname; | |
573 | Attrib *a; | |
574 | ||
575 | expected_id = id = conn->msg_id++; | |
576 | send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path, | |
577 | strlen(path)); | |
578 | ||
579 | buffer_init(&msg); | |
580 | ||
581 | get_msg(conn->fd_in, &msg); | |
582 | type = buffer_get_char(&msg); | |
583 | id = buffer_get_int(&msg); | |
584 | ||
585 | if (id != expected_id) | |
586 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
587 | ||
588 | if (type == SSH2_FXP_STATUS) { | |
589 | u_int status = buffer_get_int(&msg); | |
590 | ||
591 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
592 | return(NULL); | |
593 | } else if (type != SSH2_FXP_NAME) | |
594 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
595 | SSH2_FXP_NAME, type); | |
596 | ||
597 | count = buffer_get_int(&msg); | |
598 | if (count != 1) | |
599 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
600 | ||
601 | filename = buffer_get_string(&msg, NULL); | |
602 | longname = buffer_get_string(&msg, NULL); | |
603 | a = decode_attrib(&msg); | |
604 | ||
605 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
606 | ||
607 | xfree(longname); | |
608 | ||
609 | buffer_free(&msg); | |
610 | ||
611 | return(filename); | |
612 | } | |
613 | ||
614 | int | |
615 | do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) | |
616 | { | |
617 | Buffer msg; | |
618 | u_int status, id; | |
619 | ||
620 | buffer_init(&msg); | |
621 | ||
622 | /* Send rename request */ | |
623 | id = conn->msg_id++; | |
624 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
625 | buffer_put_int(&msg, id); | |
626 | buffer_put_cstring(&msg, oldpath); | |
627 | buffer_put_cstring(&msg, newpath); | |
628 | send_msg(conn->fd_out, &msg); | |
629 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
630 | newpath); | |
631 | buffer_free(&msg); | |
632 | ||
633 | status = get_status(conn->fd_in, id); | |
634 | if (status != SSH2_FX_OK) | |
635 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, | |
636 | newpath, fx2txt(status)); | |
637 | ||
638 | return(status); | |
639 | } | |
640 | ||
641 | int | |
642 | do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) | |
643 | { | |
644 | Buffer msg; | |
645 | u_int status, id; | |
646 | ||
647 | if (conn->version < 3) { | |
648 | error("This server does not support the symlink operation"); | |
649 | return(SSH2_FX_OP_UNSUPPORTED); | |
650 | } | |
651 | ||
652 | buffer_init(&msg); | |
653 | ||
654 | /* Send rename request */ | |
655 | id = conn->msg_id++; | |
656 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
657 | buffer_put_int(&msg, id); | |
658 | buffer_put_cstring(&msg, oldpath); | |
659 | buffer_put_cstring(&msg, newpath); | |
660 | send_msg(conn->fd_out, &msg); | |
661 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
662 | newpath); | |
663 | buffer_free(&msg); | |
664 | ||
665 | status = get_status(conn->fd_in, id); | |
666 | if (status != SSH2_FX_OK) | |
667 | error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, | |
668 | newpath, fx2txt(status)); | |
669 | ||
670 | return(status); | |
671 | } | |
672 | ||
673 | char * | |
674 | do_readlink(struct sftp_conn *conn, char *path) | |
675 | { | |
676 | Buffer msg; | |
677 | u_int type, expected_id, count, id; | |
678 | char *filename, *longname; | |
679 | Attrib *a; | |
680 | ||
681 | expected_id = id = conn->msg_id++; | |
682 | send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path, | |
683 | strlen(path)); | |
684 | ||
685 | buffer_init(&msg); | |
686 | ||
687 | get_msg(conn->fd_in, &msg); | |
688 | type = buffer_get_char(&msg); | |
689 | id = buffer_get_int(&msg); | |
690 | ||
691 | if (id != expected_id) | |
692 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
693 | ||
694 | if (type == SSH2_FXP_STATUS) { | |
695 | u_int status = buffer_get_int(&msg); | |
696 | ||
697 | error("Couldn't readlink: %s", fx2txt(status)); | |
698 | return(NULL); | |
699 | } else if (type != SSH2_FXP_NAME) | |
700 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
701 | SSH2_FXP_NAME, type); | |
702 | ||
703 | count = buffer_get_int(&msg); | |
704 | if (count != 1) | |
705 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
706 | ||
707 | filename = buffer_get_string(&msg, NULL); | |
708 | longname = buffer_get_string(&msg, NULL); | |
709 | a = decode_attrib(&msg); | |
710 | ||
711 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
712 | ||
713 | xfree(longname); | |
714 | ||
715 | buffer_free(&msg); | |
716 | ||
717 | return(filename); | |
718 | } | |
719 | ||
720 | static void | |
721 | send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len, | |
722 | char *handle, u_int handle_len) | |
723 | { | |
724 | Buffer msg; | |
725 | ||
726 | buffer_init(&msg); | |
727 | buffer_clear(&msg); | |
728 | buffer_put_char(&msg, SSH2_FXP_READ); | |
729 | buffer_put_int(&msg, id); | |
730 | buffer_put_string(&msg, handle, handle_len); | |
731 | buffer_put_int64(&msg, offset); | |
732 | buffer_put_int(&msg, len); | |
733 | send_msg(fd_out, &msg); | |
734 | buffer_free(&msg); | |
735 | } | |
736 | ||
737 | int | |
738 | do_download(struct sftp_conn *conn, char *remote_path, char *local_path, | |
739 | int pflag) | |
740 | { | |
741 | Attrib junk, *a; | |
742 | Buffer msg; | |
743 | char *handle; | |
744 | int local_fd, status, num_req, max_req, write_error; | |
745 | int read_error, write_errno; | |
746 | u_int64_t offset, size; | |
747 | u_int handle_len, mode, type, id, buflen; | |
748 | off_t progress_counter; | |
749 | struct request { | |
750 | u_int id; | |
751 | u_int len; | |
752 | u_int64_t offset; | |
753 | TAILQ_ENTRY(request) tq; | |
754 | }; | |
755 | TAILQ_HEAD(reqhead, request) requests; | |
756 | struct request *req; | |
757 | ||
758 | TAILQ_INIT(&requests); | |
759 | ||
760 | a = do_stat(conn, remote_path, 0); | |
761 | if (a == NULL) | |
762 | return(-1); | |
763 | ||
764 | /* XXX: should we preserve set[ug]id? */ | |
765 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
766 | mode = a->perm & 0777; | |
767 | else | |
768 | mode = 0666; | |
769 | ||
770 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
771 | (!S_ISREG(a->perm))) { | |
772 | error("Cannot download non-regular file: %s", remote_path); | |
773 | return(-1); | |
774 | } | |
775 | ||
776 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) | |
777 | size = a->size; | |
778 | else | |
779 | size = 0; | |
780 | ||
781 | buflen = conn->transfer_buflen; | |
782 | buffer_init(&msg); | |
783 | ||
784 | /* Send open request */ | |
785 | id = conn->msg_id++; | |
786 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
787 | buffer_put_int(&msg, id); | |
788 | buffer_put_cstring(&msg, remote_path); | |
789 | buffer_put_int(&msg, SSH2_FXF_READ); | |
790 | attrib_clear(&junk); /* Send empty attributes */ | |
791 | encode_attrib(&msg, &junk); | |
792 | send_msg(conn->fd_out, &msg); | |
793 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
794 | ||
795 | handle = get_handle(conn->fd_in, id, &handle_len); | |
796 | if (handle == NULL) { | |
797 | buffer_free(&msg); | |
798 | return(-1); | |
799 | } | |
800 | ||
801 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, | |
802 | mode | S_IWRITE); | |
803 | if (local_fd == -1) { | |
804 | error("Couldn't open local file \"%s\" for writing: %s", | |
805 | local_path, strerror(errno)); | |
806 | buffer_free(&msg); | |
807 | xfree(handle); | |
808 | return(-1); | |
809 | } | |
810 | ||
811 | /* Read from remote and write to local */ | |
812 | write_error = read_error = write_errno = num_req = offset = 0; | |
813 | max_req = 1; | |
814 | progress_counter = 0; | |
815 | ||
816 | if (showprogress) { | |
817 | if (size) | |
818 | start_progress_meter(remote_path, size, | |
819 | &progress_counter); | |
820 | else | |
821 | printf("Fetching %s to %s\n", remote_path, local_path); | |
822 | } | |
823 | ||
824 | while (num_req > 0 || max_req > 0) { | |
825 | char *data; | |
826 | u_int len; | |
827 | ||
828 | /* Send some more requests */ | |
829 | while (num_req < max_req) { | |
830 | debug3("Request range %llu -> %llu (%d/%d)", | |
831 | (unsigned long long)offset, | |
832 | (unsigned long long)offset + buflen - 1, | |
833 | num_req, max_req); | |
834 | req = xmalloc(sizeof(*req)); | |
835 | req->id = conn->msg_id++; | |
836 | req->len = buflen; | |
837 | req->offset = offset; | |
838 | offset += buflen; | |
839 | num_req++; | |
840 | TAILQ_INSERT_TAIL(&requests, req, tq); | |
841 | send_read_request(conn->fd_out, req->id, req->offset, | |
842 | req->len, handle, handle_len); | |
843 | } | |
844 | ||
845 | buffer_clear(&msg); | |
846 | get_msg(conn->fd_in, &msg); | |
847 | type = buffer_get_char(&msg); | |
848 | id = buffer_get_int(&msg); | |
849 | debug3("Received reply T:%u I:%u R:%d", type, id, max_req); | |
850 | ||
851 | /* Find the request in our queue */ | |
852 | for(req = TAILQ_FIRST(&requests); | |
853 | req != NULL && req->id != id; | |
854 | req = TAILQ_NEXT(req, tq)) | |
855 | ; | |
856 | if (req == NULL) | |
857 | fatal("Unexpected reply %u", id); | |
858 | ||
859 | switch (type) { | |
860 | case SSH2_FXP_STATUS: | |
861 | status = buffer_get_int(&msg); | |
862 | if (status != SSH2_FX_EOF) | |
863 | read_error = 1; | |
864 | max_req = 0; | |
865 | TAILQ_REMOVE(&requests, req, tq); | |
866 | xfree(req); | |
867 | num_req--; | |
868 | break; | |
869 | case SSH2_FXP_DATA: | |
870 | data = buffer_get_string(&msg, &len); | |
871 | debug3("Received data %llu -> %llu", | |
872 | (unsigned long long)req->offset, | |
873 | (unsigned long long)req->offset + len - 1); | |
874 | if (len > req->len) | |
875 | fatal("Received more data than asked for " | |
876 | "%u > %u", len, req->len); | |
877 | if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || | |
878 | atomicio(write, local_fd, data, len) != len) && | |
879 | !write_error) { | |
880 | write_errno = errno; | |
881 | write_error = 1; | |
882 | max_req = 0; | |
883 | } | |
884 | progress_counter += len; | |
885 | xfree(data); | |
886 | ||
887 | if (len == req->len) { | |
888 | TAILQ_REMOVE(&requests, req, tq); | |
889 | xfree(req); | |
890 | num_req--; | |
891 | } else { | |
892 | /* Resend the request for the missing data */ | |
893 | debug3("Short data block, re-requesting " | |
894 | "%llu -> %llu (%2d)", | |
895 | (unsigned long long)req->offset + len, | |
896 | (unsigned long long)req->offset + | |
897 | req->len - 1, num_req); | |
898 | req->id = conn->msg_id++; | |
899 | req->len -= len; | |
900 | req->offset += len; | |
901 | send_read_request(conn->fd_out, req->id, | |
902 | req->offset, req->len, handle, handle_len); | |
903 | /* Reduce the request size */ | |
904 | if (len < buflen) | |
905 | buflen = MAX(MIN_READ_SIZE, len); | |
906 | } | |
907 | if (max_req > 0) { /* max_req = 0 iff EOF received */ | |
908 | if (size > 0 && offset > size) { | |
909 | /* Only one request at a time | |
910 | * after the expected EOF */ | |
911 | debug3("Finish at %llu (%2d)", | |
912 | (unsigned long long)offset, | |
913 | num_req); | |
914 | max_req = 1; | |
915 | } | |
916 | else if (max_req < conn->num_requests + 1) { | |
917 | ++max_req; | |
918 | } | |
919 | } | |
920 | break; | |
921 | default: | |
922 | fatal("Expected SSH2_FXP_DATA(%u) packet, got %u", | |
923 | SSH2_FXP_DATA, type); | |
924 | } | |
925 | } | |
926 | ||
927 | if (showprogress && size) | |
928 | stop_progress_meter(); | |
929 | ||
930 | /* Sanity check */ | |
931 | if (TAILQ_FIRST(&requests) != NULL) | |
932 | fatal("Transfer complete, but requests still in queue"); | |
933 | ||
934 | if (read_error) { | |
935 | error("Couldn't read from remote file \"%s\" : %s", | |
936 | remote_path, fx2txt(status)); | |
937 | do_close(conn, handle, handle_len); | |
938 | } else if (write_error) { | |
939 | error("Couldn't write to \"%s\": %s", local_path, | |
940 | strerror(write_errno)); | |
941 | status = -1; | |
942 | do_close(conn, handle, handle_len); | |
943 | } else { | |
944 | status = do_close(conn, handle, handle_len); | |
945 | ||
946 | /* Override umask and utimes if asked */ | |
947 | #ifdef HAVE_FCHMOD | |
948 | if (pflag && fchmod(local_fd, mode) == -1) | |
949 | #else | |
950 | if (pflag && chmod(local_path, mode) == -1) | |
951 | #endif /* HAVE_FCHMOD */ | |
952 | error("Couldn't set mode on \"%s\": %s", local_path, | |
953 | strerror(errno)); | |
954 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
955 | struct timeval tv[2]; | |
956 | tv[0].tv_sec = a->atime; | |
957 | tv[1].tv_sec = a->mtime; | |
958 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
959 | if (utimes(local_path, tv) == -1) | |
960 | error("Can't set times on \"%s\": %s", | |
961 | local_path, strerror(errno)); | |
962 | } | |
963 | } | |
964 | close(local_fd); | |
965 | buffer_free(&msg); | |
966 | xfree(handle); | |
967 | ||
968 | return(status); | |
969 | } | |
970 | ||
971 | int | |
972 | do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, | |
973 | int pflag) | |
974 | { | |
975 | int local_fd, status; | |
976 | u_int handle_len, id, type; | |
977 | u_int64_t offset; | |
978 | char *handle, *data; | |
979 | Buffer msg; | |
980 | struct stat sb; | |
981 | Attrib a; | |
982 | u_int32_t startid; | |
983 | u_int32_t ackid; | |
984 | struct outstanding_ack { | |
985 | u_int id; | |
986 | u_int len; | |
987 | u_int64_t offset; | |
988 | TAILQ_ENTRY(outstanding_ack) tq; | |
989 | }; | |
990 | TAILQ_HEAD(ackhead, outstanding_ack) acks; | |
991 | struct outstanding_ack *ack; | |
992 | ||
993 | TAILQ_INIT(&acks); | |
994 | ||
995 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
996 | error("Couldn't open local file \"%s\" for reading: %s", | |
997 | local_path, strerror(errno)); | |
998 | return(-1); | |
999 | } | |
1000 | if (fstat(local_fd, &sb) == -1) { | |
1001 | error("Couldn't fstat local file \"%s\": %s", | |
1002 | local_path, strerror(errno)); | |
1003 | close(local_fd); | |
1004 | return(-1); | |
1005 | } | |
1006 | if (!S_ISREG(sb.st_mode)) { | |
1007 | error("%s is not a regular file", local_path); | |
1008 | close(local_fd); | |
1009 | return(-1); | |
1010 | } | |
1011 | stat_to_attrib(&sb, &a); | |
1012 | ||
1013 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
1014 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
1015 | a.perm &= 0777; | |
1016 | if (!pflag) | |
1017 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
1018 | ||
1019 | buffer_init(&msg); | |
1020 | ||
1021 | /* Send open request */ | |
1022 | id = conn->msg_id++; | |
1023 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
1024 | buffer_put_int(&msg, id); | |
1025 | buffer_put_cstring(&msg, remote_path); | |
1026 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
1027 | encode_attrib(&msg, &a); | |
1028 | send_msg(conn->fd_out, &msg); | |
1029 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
1030 | ||
1031 | buffer_clear(&msg); | |
1032 | ||
1033 | handle = get_handle(conn->fd_in, id, &handle_len); | |
1034 | if (handle == NULL) { | |
1035 | close(local_fd); | |
1036 | buffer_free(&msg); | |
1037 | return(-1); | |
1038 | } | |
1039 | ||
1040 | startid = ackid = id + 1; | |
1041 | data = xmalloc(conn->transfer_buflen); | |
1042 | ||
1043 | /* Read from local and write to remote */ | |
1044 | offset = 0; | |
1045 | if (showprogress) | |
1046 | start_progress_meter(local_path, sb.st_size, &offset); | |
1047 | else | |
1048 | printf("Uploading %s to %s\n", local_path, remote_path); | |
1049 | ||
1050 | for (;;) { | |
1051 | int len; | |
1052 | ||
1053 | /* | |
1054 | * Can't use atomicio here because it returns 0 on EOF, thus losing | |
1055 | * the last block of the file | |
1056 | */ | |
1057 | do | |
1058 | len = read(local_fd, data, conn->transfer_buflen); | |
1059 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
1060 | ||
1061 | if (len == -1) | |
1062 | fatal("Couldn't read from \"%s\": %s", local_path, | |
1063 | strerror(errno)); | |
1064 | ||
1065 | if (len != 0) { | |
1066 | ack = xmalloc(sizeof(*ack)); | |
1067 | ack->id = ++id; | |
1068 | ack->offset = offset; | |
1069 | ack->len = len; | |
1070 | TAILQ_INSERT_TAIL(&acks, ack, tq); | |
1071 | ||
1072 | buffer_clear(&msg); | |
1073 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
1074 | buffer_put_int(&msg, ack->id); | |
1075 | buffer_put_string(&msg, handle, handle_len); | |
1076 | buffer_put_int64(&msg, offset); | |
1077 | buffer_put_string(&msg, data, len); | |
1078 | send_msg(conn->fd_out, &msg); | |
1079 | debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", | |
1080 | id, (unsigned long long)offset, len); | |
1081 | } else if (TAILQ_FIRST(&acks) == NULL) | |
1082 | break; | |
1083 | ||
1084 | if (ack == NULL) | |
1085 | fatal("Unexpected ACK %u", id); | |
1086 | ||
1087 | if (id == startid || len == 0 || | |
1088 | id - ackid >= conn->num_requests) { | |
1089 | u_int r_id; | |
1090 | ||
1091 | buffer_clear(&msg); | |
1092 | get_msg(conn->fd_in, &msg); | |
1093 | type = buffer_get_char(&msg); | |
1094 | r_id = buffer_get_int(&msg); | |
1095 | ||
1096 | if (type != SSH2_FXP_STATUS) | |
1097 | fatal("Expected SSH2_FXP_STATUS(%d) packet, " | |
1098 | "got %d", SSH2_FXP_STATUS, type); | |
1099 | ||
1100 | status = buffer_get_int(&msg); | |
1101 | debug3("SSH2_FXP_STATUS %d", status); | |
1102 | ||
1103 | /* Find the request in our queue */ | |
1104 | for(ack = TAILQ_FIRST(&acks); | |
1105 | ack != NULL && ack->id != r_id; | |
1106 | ack = TAILQ_NEXT(ack, tq)) | |
1107 | ; | |
1108 | if (ack == NULL) | |
1109 | fatal("Can't find request for ID %u", r_id); | |
1110 | TAILQ_REMOVE(&acks, ack, tq); | |
1111 | ||
1112 | if (status != SSH2_FX_OK) { | |
1113 | error("Couldn't write to remote file \"%s\": %s", | |
1114 | remote_path, fx2txt(status)); | |
1115 | do_close(conn, handle, handle_len); | |
1116 | close(local_fd); | |
1117 | xfree(data); | |
1118 | xfree(ack); | |
1119 | goto done; | |
1120 | } | |
1121 | debug3("In write loop, ack for %u %u bytes at %llu", | |
1122 | ack->id, ack->len, (unsigned long long)ack->offset); | |
1123 | ++ackid; | |
1124 | xfree(ack); | |
1125 | } | |
1126 | offset += len; | |
1127 | } | |
1128 | if (showprogress) | |
1129 | stop_progress_meter(); | |
1130 | xfree(data); | |
1131 | ||
1132 | if (close(local_fd) == -1) { | |
1133 | error("Couldn't close local file \"%s\": %s", local_path, | |
1134 | strerror(errno)); | |
1135 | do_close(conn, handle, handle_len); | |
1136 | status = -1; | |
1137 | goto done; | |
1138 | } | |
1139 | ||
1140 | /* Override umask and utimes if asked */ | |
1141 | if (pflag) | |
1142 | do_fsetstat(conn, handle, handle_len, &a); | |
1143 | ||
1144 | status = do_close(conn, handle, handle_len); | |
1145 | ||
1146 | done: | |
1147 | xfree(handle); | |
1148 | buffer_free(&msg); | |
1149 | return(status); | |
1150 | } |