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1 | /* | |
2 | * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | /* XXX: memleaks */ | |
18 | /* XXX: signed vs unsigned */ | |
19 | /* XXX: remove all logging, only return status codes */ | |
20 | /* XXX: copy between two remote sites */ | |
21 | ||
22 | #include "includes.h" | |
23 | RCSID("$OpenBSD: sftp-client.c,v 1.58 2006/01/02 01:20:31 djm Exp $"); | |
24 | ||
25 | #include "openbsd-compat/sys-queue.h" | |
26 | ||
27 | #include "buffer.h" | |
28 | #include "bufaux.h" | |
29 | #include "getput.h" | |
30 | #include "xmalloc.h" | |
31 | #include "log.h" | |
32 | #include "atomicio.h" | |
33 | #include "progressmeter.h" | |
34 | ||
35 | #include "sftp.h" | |
36 | #include "sftp-common.h" | |
37 | #include "sftp-client.h" | |
38 | ||
39 | extern volatile sig_atomic_t interrupted; | |
40 | extern int showprogress; | |
41 | ||
42 | /* Minimum amount of data to read at at time */ | |
43 | #define MIN_READ_SIZE 512 | |
44 | ||
45 | struct sftp_conn { | |
46 | int fd_in; | |
47 | int fd_out; | |
48 | u_int transfer_buflen; | |
49 | u_int num_requests; | |
50 | u_int version; | |
51 | u_int msg_id; | |
52 | }; | |
53 | ||
54 | static void | |
55 | send_msg(int fd, Buffer *m) | |
56 | { | |
57 | u_char mlen[4]; | |
58 | ||
59 | if (buffer_len(m) > SFTP_MAX_MSG_LENGTH) | |
60 | fatal("Outbound message too long %u", buffer_len(m)); | |
61 | ||
62 | /* Send length first */ | |
63 | PUT_32BIT(mlen, buffer_len(m)); | |
64 | if (atomicio(vwrite, fd, mlen, sizeof(mlen)) != sizeof(mlen)) | |
65 | fatal("Couldn't send packet: %s", strerror(errno)); | |
66 | ||
67 | if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) != buffer_len(m)) | |
68 | fatal("Couldn't send packet: %s", strerror(errno)); | |
69 | ||
70 | buffer_clear(m); | |
71 | } | |
72 | ||
73 | static void | |
74 | get_msg(int fd, Buffer *m) | |
75 | { | |
76 | u_int msg_len; | |
77 | ||
78 | buffer_append_space(m, 4); | |
79 | if (atomicio(read, fd, buffer_ptr(m), 4) != 4) { | |
80 | if (errno == EPIPE) | |
81 | fatal("Connection closed"); | |
82 | else | |
83 | fatal("Couldn't read packet: %s", strerror(errno)); | |
84 | } | |
85 | ||
86 | msg_len = buffer_get_int(m); | |
87 | if (msg_len > SFTP_MAX_MSG_LENGTH) | |
88 | fatal("Received message too long %u", msg_len); | |
89 | ||
90 | buffer_append_space(m, msg_len); | |
91 | if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) { | |
92 | if (errno == EPIPE) | |
93 | fatal("Connection closed"); | |
94 | else | |
95 | fatal("Read packet: %s", strerror(errno)); | |
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:%u I:%u", 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:%u I:%u", fd, code, id); | |
127 | buffer_free(&msg); | |
128 | } | |
129 | ||
130 | static u_int | |
131 | get_status(int fd, u_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 (%u != %u)", id, expected_id); | |
143 | if (type != SSH2_FXP_STATUS) | |
144 | fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", | |
145 | SSH2_FXP_STATUS, type); | |
146 | ||
147 | status = buffer_get_int(&msg); | |
148 | buffer_free(&msg); | |
149 | ||
150 | debug3("SSH2_FXP_STATUS %u", 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 (%u != %u)", 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 | buffer_free(&msg); | |
174 | return(NULL); | |
175 | } else if (type != SSH2_FXP_HANDLE) | |
176 | fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u", | |
177 | SSH2_FXP_HANDLE, type); | |
178 | ||
179 | handle = buffer_get_string(&msg, len); | |
180 | buffer_free(&msg); | |
181 | ||
182 | return(handle); | |
183 | } | |
184 | ||
185 | static Attrib * | |
186 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
187 | { | |
188 | Buffer msg; | |
189 | u_int type, id; | |
190 | Attrib *a; | |
191 | ||
192 | buffer_init(&msg); | |
193 | get_msg(fd, &msg); | |
194 | ||
195 | type = buffer_get_char(&msg); | |
196 | id = buffer_get_int(&msg); | |
197 | ||
198 | debug3("Received stat reply T:%u I:%u", type, id); | |
199 | if (id != expected_id) | |
200 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
201 | if (type == SSH2_FXP_STATUS) { | |
202 | int status = buffer_get_int(&msg); | |
203 | ||
204 | if (quiet) | |
205 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
206 | else | |
207 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
208 | buffer_free(&msg); | |
209 | return(NULL); | |
210 | } else if (type != SSH2_FXP_ATTRS) { | |
211 | fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", | |
212 | SSH2_FXP_ATTRS, type); | |
213 | } | |
214 | a = decode_attrib(&msg); | |
215 | buffer_free(&msg); | |
216 | ||
217 | return(a); | |
218 | } | |
219 | ||
220 | struct sftp_conn * | |
221 | do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests) | |
222 | { | |
223 | u_int type; | |
224 | int version; | |
225 | Buffer msg; | |
226 | struct sftp_conn *ret; | |
227 | ||
228 | buffer_init(&msg); | |
229 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
230 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
231 | send_msg(fd_out, &msg); | |
232 | ||
233 | buffer_clear(&msg); | |
234 | ||
235 | get_msg(fd_in, &msg); | |
236 | ||
237 | /* Expecting a VERSION reply */ | |
238 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
239 | error("Invalid packet back from SSH2_FXP_INIT (type %u)", | |
240 | type); | |
241 | buffer_free(&msg); | |
242 | return(NULL); | |
243 | } | |
244 | version = buffer_get_int(&msg); | |
245 | ||
246 | debug2("Remote version: %d", version); | |
247 | ||
248 | /* Check for extensions */ | |
249 | while (buffer_len(&msg) > 0) { | |
250 | char *name = buffer_get_string(&msg, NULL); | |
251 | char *value = buffer_get_string(&msg, NULL); | |
252 | ||
253 | debug2("Init extension: \"%s\"", name); | |
254 | xfree(name); | |
255 | xfree(value); | |
256 | } | |
257 | ||
258 | buffer_free(&msg); | |
259 | ||
260 | ret = xmalloc(sizeof(*ret)); | |
261 | ret->fd_in = fd_in; | |
262 | ret->fd_out = fd_out; | |
263 | ret->transfer_buflen = transfer_buflen; | |
264 | ret->num_requests = num_requests; | |
265 | ret->version = version; | |
266 | ret->msg_id = 1; | |
267 | ||
268 | /* Some filexfer v.0 servers don't support large packets */ | |
269 | if (version == 0) | |
270 | ret->transfer_buflen = MIN(ret->transfer_buflen, 20480); | |
271 | ||
272 | return(ret); | |
273 | } | |
274 | ||
275 | u_int | |
276 | sftp_proto_version(struct sftp_conn *conn) | |
277 | { | |
278 | return(conn->version); | |
279 | } | |
280 | ||
281 | int | |
282 | do_close(struct sftp_conn *conn, char *handle, u_int handle_len) | |
283 | { | |
284 | u_int id, status; | |
285 | Buffer msg; | |
286 | ||
287 | buffer_init(&msg); | |
288 | ||
289 | id = conn->msg_id++; | |
290 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
291 | buffer_put_int(&msg, id); | |
292 | buffer_put_string(&msg, handle, handle_len); | |
293 | send_msg(conn->fd_out, &msg); | |
294 | debug3("Sent message SSH2_FXP_CLOSE I:%u", id); | |
295 | ||
296 | status = get_status(conn->fd_in, id); | |
297 | if (status != SSH2_FX_OK) | |
298 | error("Couldn't close file: %s", fx2txt(status)); | |
299 | ||
300 | buffer_free(&msg); | |
301 | ||
302 | return(status); | |
303 | } | |
304 | ||
305 | ||
306 | static int | |
307 | do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, | |
308 | SFTP_DIRENT ***dir) | |
309 | { | |
310 | Buffer msg; | |
311 | u_int count, type, id, handle_len, i, expected_id, ents = 0; | |
312 | char *handle; | |
313 | ||
314 | id = conn->msg_id++; | |
315 | ||
316 | buffer_init(&msg); | |
317 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
318 | buffer_put_int(&msg, id); | |
319 | buffer_put_cstring(&msg, path); | |
320 | send_msg(conn->fd_out, &msg); | |
321 | ||
322 | buffer_clear(&msg); | |
323 | ||
324 | handle = get_handle(conn->fd_in, id, &handle_len); | |
325 | if (handle == NULL) | |
326 | return(-1); | |
327 | ||
328 | if (dir) { | |
329 | ents = 0; | |
330 | *dir = xmalloc(sizeof(**dir)); | |
331 | (*dir)[0] = NULL; | |
332 | } | |
333 | ||
334 | for (; !interrupted;) { | |
335 | id = expected_id = conn->msg_id++; | |
336 | ||
337 | debug3("Sending SSH2_FXP_READDIR I:%u", id); | |
338 | ||
339 | buffer_clear(&msg); | |
340 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
341 | buffer_put_int(&msg, id); | |
342 | buffer_put_string(&msg, handle, handle_len); | |
343 | send_msg(conn->fd_out, &msg); | |
344 | ||
345 | buffer_clear(&msg); | |
346 | ||
347 | get_msg(conn->fd_in, &msg); | |
348 | ||
349 | type = buffer_get_char(&msg); | |
350 | id = buffer_get_int(&msg); | |
351 | ||
352 | debug3("Received reply T:%u I:%u", type, id); | |
353 | ||
354 | if (id != expected_id) | |
355 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
356 | ||
357 | if (type == SSH2_FXP_STATUS) { | |
358 | int status = buffer_get_int(&msg); | |
359 | ||
360 | debug3("Received SSH2_FXP_STATUS %d", status); | |
361 | ||
362 | if (status == SSH2_FX_EOF) { | |
363 | break; | |
364 | } else { | |
365 | error("Couldn't read directory: %s", | |
366 | fx2txt(status)); | |
367 | do_close(conn, handle, handle_len); | |
368 | xfree(handle); | |
369 | return(status); | |
370 | } | |
371 | } else if (type != SSH2_FXP_NAME) | |
372 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
373 | SSH2_FXP_NAME, type); | |
374 | ||
375 | count = buffer_get_int(&msg); | |
376 | if (count == 0) | |
377 | break; | |
378 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
379 | for (i = 0; i < count; i++) { | |
380 | char *filename, *longname; | |
381 | Attrib *a; | |
382 | ||
383 | filename = buffer_get_string(&msg, NULL); | |
384 | longname = buffer_get_string(&msg, NULL); | |
385 | a = decode_attrib(&msg); | |
386 | ||
387 | if (printflag) | |
388 | printf("%s\n", longname); | |
389 | ||
390 | if (dir) { | |
391 | *dir = xrealloc(*dir, sizeof(**dir) * | |
392 | (ents + 2)); | |
393 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
394 | (*dir)[ents]->filename = xstrdup(filename); | |
395 | (*dir)[ents]->longname = xstrdup(longname); | |
396 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
397 | (*dir)[++ents] = NULL; | |
398 | } | |
399 | ||
400 | xfree(filename); | |
401 | xfree(longname); | |
402 | } | |
403 | } | |
404 | ||
405 | buffer_free(&msg); | |
406 | do_close(conn, handle, handle_len); | |
407 | xfree(handle); | |
408 | ||
409 | /* Don't return partial matches on interrupt */ | |
410 | if (interrupted && dir != NULL && *dir != NULL) { | |
411 | free_sftp_dirents(*dir); | |
412 | *dir = xmalloc(sizeof(**dir)); | |
413 | **dir = NULL; | |
414 | } | |
415 | ||
416 | return(0); | |
417 | } | |
418 | ||
419 | int | |
420 | do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) | |
421 | { | |
422 | return(do_lsreaddir(conn, path, 0, dir)); | |
423 | } | |
424 | ||
425 | void free_sftp_dirents(SFTP_DIRENT **s) | |
426 | { | |
427 | int i; | |
428 | ||
429 | for (i = 0; s[i]; i++) { | |
430 | xfree(s[i]->filename); | |
431 | xfree(s[i]->longname); | |
432 | xfree(s[i]); | |
433 | } | |
434 | xfree(s); | |
435 | } | |
436 | ||
437 | int | |
438 | do_rm(struct sftp_conn *conn, char *path) | |
439 | { | |
440 | u_int status, id; | |
441 | ||
442 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
443 | ||
444 | id = conn->msg_id++; | |
445 | send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path, | |
446 | strlen(path)); | |
447 | status = get_status(conn->fd_in, id); | |
448 | if (status != SSH2_FX_OK) | |
449 | error("Couldn't delete file: %s", fx2txt(status)); | |
450 | return(status); | |
451 | } | |
452 | ||
453 | int | |
454 | do_mkdir(struct sftp_conn *conn, char *path, Attrib *a) | |
455 | { | |
456 | u_int status, id; | |
457 | ||
458 | id = conn->msg_id++; | |
459 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path, | |
460 | strlen(path), a); | |
461 | ||
462 | status = get_status(conn->fd_in, id); | |
463 | if (status != SSH2_FX_OK) | |
464 | error("Couldn't create directory: %s", fx2txt(status)); | |
465 | ||
466 | return(status); | |
467 | } | |
468 | ||
469 | int | |
470 | do_rmdir(struct sftp_conn *conn, char *path) | |
471 | { | |
472 | u_int status, id; | |
473 | ||
474 | id = conn->msg_id++; | |
475 | send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path, | |
476 | strlen(path)); | |
477 | ||
478 | status = get_status(conn->fd_in, id); | |
479 | if (status != SSH2_FX_OK) | |
480 | error("Couldn't remove directory: %s", fx2txt(status)); | |
481 | ||
482 | return(status); | |
483 | } | |
484 | ||
485 | Attrib * | |
486 | do_stat(struct sftp_conn *conn, char *path, int quiet) | |
487 | { | |
488 | u_int id; | |
489 | ||
490 | id = conn->msg_id++; | |
491 | ||
492 | send_string_request(conn->fd_out, id, | |
493 | conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT, | |
494 | path, strlen(path)); | |
495 | ||
496 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
497 | } | |
498 | ||
499 | Attrib * | |
500 | do_lstat(struct sftp_conn *conn, char *path, int quiet) | |
501 | { | |
502 | u_int id; | |
503 | ||
504 | if (conn->version == 0) { | |
505 | if (quiet) | |
506 | debug("Server version does not support lstat operation"); | |
507 | else | |
508 | logit("Server version does not support lstat operation"); | |
509 | return(do_stat(conn, path, quiet)); | |
510 | } | |
511 | ||
512 | id = conn->msg_id++; | |
513 | send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path, | |
514 | strlen(path)); | |
515 | ||
516 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
517 | } | |
518 | ||
519 | Attrib * | |
520 | do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) | |
521 | { | |
522 | u_int id; | |
523 | ||
524 | id = conn->msg_id++; | |
525 | send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle, | |
526 | handle_len); | |
527 | ||
528 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
529 | } | |
530 | ||
531 | int | |
532 | do_setstat(struct sftp_conn *conn, char *path, Attrib *a) | |
533 | { | |
534 | u_int status, id; | |
535 | ||
536 | id = conn->msg_id++; | |
537 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path, | |
538 | strlen(path), a); | |
539 | ||
540 | status = get_status(conn->fd_in, id); | |
541 | if (status != SSH2_FX_OK) | |
542 | error("Couldn't setstat on \"%s\": %s", path, | |
543 | fx2txt(status)); | |
544 | ||
545 | return(status); | |
546 | } | |
547 | ||
548 | int | |
549 | do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, | |
550 | Attrib *a) | |
551 | { | |
552 | u_int status, id; | |
553 | ||
554 | id = conn->msg_id++; | |
555 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
556 | handle_len, a); | |
557 | ||
558 | status = get_status(conn->fd_in, id); | |
559 | if (status != SSH2_FX_OK) | |
560 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
561 | ||
562 | return(status); | |
563 | } | |
564 | ||
565 | char * | |
566 | do_realpath(struct sftp_conn *conn, char *path) | |
567 | { | |
568 | Buffer msg; | |
569 | u_int type, expected_id, count, id; | |
570 | char *filename, *longname; | |
571 | Attrib *a; | |
572 | ||
573 | expected_id = id = conn->msg_id++; | |
574 | send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path, | |
575 | strlen(path)); | |
576 | ||
577 | buffer_init(&msg); | |
578 | ||
579 | get_msg(conn->fd_in, &msg); | |
580 | type = buffer_get_char(&msg); | |
581 | id = buffer_get_int(&msg); | |
582 | ||
583 | if (id != expected_id) | |
584 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
585 | ||
586 | if (type == SSH2_FXP_STATUS) { | |
587 | u_int status = buffer_get_int(&msg); | |
588 | ||
589 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
590 | return(NULL); | |
591 | } else if (type != SSH2_FXP_NAME) | |
592 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
593 | SSH2_FXP_NAME, type); | |
594 | ||
595 | count = buffer_get_int(&msg); | |
596 | if (count != 1) | |
597 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
598 | ||
599 | filename = buffer_get_string(&msg, NULL); | |
600 | longname = buffer_get_string(&msg, NULL); | |
601 | a = decode_attrib(&msg); | |
602 | ||
603 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
604 | ||
605 | xfree(longname); | |
606 | ||
607 | buffer_free(&msg); | |
608 | ||
609 | return(filename); | |
610 | } | |
611 | ||
612 | int | |
613 | do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) | |
614 | { | |
615 | Buffer msg; | |
616 | u_int status, id; | |
617 | ||
618 | buffer_init(&msg); | |
619 | ||
620 | /* Send rename request */ | |
621 | id = conn->msg_id++; | |
622 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
623 | buffer_put_int(&msg, id); | |
624 | buffer_put_cstring(&msg, oldpath); | |
625 | buffer_put_cstring(&msg, newpath); | |
626 | send_msg(conn->fd_out, &msg); | |
627 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
628 | newpath); | |
629 | buffer_free(&msg); | |
630 | ||
631 | status = get_status(conn->fd_in, id); | |
632 | if (status != SSH2_FX_OK) | |
633 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, | |
634 | newpath, fx2txt(status)); | |
635 | ||
636 | return(status); | |
637 | } | |
638 | ||
639 | int | |
640 | do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) | |
641 | { | |
642 | Buffer msg; | |
643 | u_int status, id; | |
644 | ||
645 | if (conn->version < 3) { | |
646 | error("This server does not support the symlink operation"); | |
647 | return(SSH2_FX_OP_UNSUPPORTED); | |
648 | } | |
649 | ||
650 | buffer_init(&msg); | |
651 | ||
652 | /* Send symlink request */ | |
653 | id = conn->msg_id++; | |
654 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
655 | buffer_put_int(&msg, id); | |
656 | buffer_put_cstring(&msg, oldpath); | |
657 | buffer_put_cstring(&msg, newpath); | |
658 | send_msg(conn->fd_out, &msg); | |
659 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
660 | newpath); | |
661 | buffer_free(&msg); | |
662 | ||
663 | status = get_status(conn->fd_in, id); | |
664 | if (status != SSH2_FX_OK) | |
665 | error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, | |
666 | newpath, fx2txt(status)); | |
667 | ||
668 | return(status); | |
669 | } | |
670 | ||
671 | char * | |
672 | do_readlink(struct sftp_conn *conn, char *path) | |
673 | { | |
674 | Buffer msg; | |
675 | u_int type, expected_id, count, id; | |
676 | char *filename, *longname; | |
677 | Attrib *a; | |
678 | ||
679 | expected_id = id = conn->msg_id++; | |
680 | send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path, | |
681 | strlen(path)); | |
682 | ||
683 | buffer_init(&msg); | |
684 | ||
685 | get_msg(conn->fd_in, &msg); | |
686 | type = buffer_get_char(&msg); | |
687 | id = buffer_get_int(&msg); | |
688 | ||
689 | if (id != expected_id) | |
690 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
691 | ||
692 | if (type == SSH2_FXP_STATUS) { | |
693 | u_int status = buffer_get_int(&msg); | |
694 | ||
695 | error("Couldn't readlink: %s", fx2txt(status)); | |
696 | return(NULL); | |
697 | } else if (type != SSH2_FXP_NAME) | |
698 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
699 | SSH2_FXP_NAME, type); | |
700 | ||
701 | count = buffer_get_int(&msg); | |
702 | if (count != 1) | |
703 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
704 | ||
705 | filename = buffer_get_string(&msg, NULL); | |
706 | longname = buffer_get_string(&msg, NULL); | |
707 | a = decode_attrib(&msg); | |
708 | ||
709 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
710 | ||
711 | xfree(longname); | |
712 | ||
713 | buffer_free(&msg); | |
714 | ||
715 | return(filename); | |
716 | } | |
717 | ||
718 | static void | |
719 | send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len, | |
720 | char *handle, u_int handle_len) | |
721 | { | |
722 | Buffer msg; | |
723 | ||
724 | buffer_init(&msg); | |
725 | buffer_clear(&msg); | |
726 | buffer_put_char(&msg, SSH2_FXP_READ); | |
727 | buffer_put_int(&msg, id); | |
728 | buffer_put_string(&msg, handle, handle_len); | |
729 | buffer_put_int64(&msg, offset); | |
730 | buffer_put_int(&msg, len); | |
731 | send_msg(fd_out, &msg); | |
732 | buffer_free(&msg); | |
733 | } | |
734 | ||
735 | int | |
736 | do_download(struct sftp_conn *conn, char *remote_path, char *local_path, | |
737 | int pflag) | |
738 | { | |
739 | Attrib junk, *a; | |
740 | Buffer msg; | |
741 | char *handle; | |
742 | int local_fd, status = 0, write_error; | |
743 | int read_error, write_errno; | |
744 | u_int64_t offset, size; | |
745 | u_int handle_len, mode, type, id, buflen, num_req, max_req; | |
746 | off_t progress_counter; | |
747 | struct request { | |
748 | u_int id; | |
749 | u_int len; | |
750 | u_int64_t offset; | |
751 | TAILQ_ENTRY(request) tq; | |
752 | }; | |
753 | TAILQ_HEAD(reqhead, request) requests; | |
754 | struct request *req; | |
755 | ||
756 | TAILQ_INIT(&requests); | |
757 | ||
758 | a = do_stat(conn, remote_path, 0); | |
759 | if (a == NULL) | |
760 | return(-1); | |
761 | ||
762 | /* XXX: should we preserve set[ug]id? */ | |
763 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
764 | mode = a->perm & 0777; | |
765 | else | |
766 | mode = 0666; | |
767 | ||
768 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
769 | (!S_ISREG(a->perm))) { | |
770 | error("Cannot download non-regular file: %s", remote_path); | |
771 | return(-1); | |
772 | } | |
773 | ||
774 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) | |
775 | size = a->size; | |
776 | else | |
777 | size = 0; | |
778 | ||
779 | buflen = conn->transfer_buflen; | |
780 | buffer_init(&msg); | |
781 | ||
782 | /* Send open request */ | |
783 | id = conn->msg_id++; | |
784 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
785 | buffer_put_int(&msg, id); | |
786 | buffer_put_cstring(&msg, remote_path); | |
787 | buffer_put_int(&msg, SSH2_FXF_READ); | |
788 | attrib_clear(&junk); /* Send empty attributes */ | |
789 | encode_attrib(&msg, &junk); | |
790 | send_msg(conn->fd_out, &msg); | |
791 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
792 | ||
793 | handle = get_handle(conn->fd_in, id, &handle_len); | |
794 | if (handle == NULL) { | |
795 | buffer_free(&msg); | |
796 | return(-1); | |
797 | } | |
798 | ||
799 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, | |
800 | mode | S_IWRITE); | |
801 | if (local_fd == -1) { | |
802 | error("Couldn't open local file \"%s\" for writing: %s", | |
803 | local_path, strerror(errno)); | |
804 | buffer_free(&msg); | |
805 | xfree(handle); | |
806 | return(-1); | |
807 | } | |
808 | ||
809 | /* Read from remote and write to local */ | |
810 | write_error = read_error = write_errno = num_req = offset = 0; | |
811 | max_req = 1; | |
812 | progress_counter = 0; | |
813 | ||
814 | if (showprogress && size != 0) | |
815 | start_progress_meter(remote_path, size, &progress_counter); | |
816 | ||
817 | while (num_req > 0 || max_req > 0) { | |
818 | char *data; | |
819 | u_int len; | |
820 | ||
821 | /* | |
822 | * Simulate EOF on interrupt: stop sending new requests and | |
823 | * allow outstanding requests to drain gracefully | |
824 | */ | |
825 | if (interrupted) { | |
826 | if (num_req == 0) /* If we haven't started yet... */ | |
827 | break; | |
828 | max_req = 0; | |
829 | } | |
830 | ||
831 | /* Send some more requests */ | |
832 | while (num_req < max_req) { | |
833 | debug3("Request range %llu -> %llu (%d/%d)", | |
834 | (unsigned long long)offset, | |
835 | (unsigned long long)offset + buflen - 1, | |
836 | num_req, max_req); | |
837 | req = xmalloc(sizeof(*req)); | |
838 | req->id = conn->msg_id++; | |
839 | req->len = buflen; | |
840 | req->offset = offset; | |
841 | offset += buflen; | |
842 | num_req++; | |
843 | TAILQ_INSERT_TAIL(&requests, req, tq); | |
844 | send_read_request(conn->fd_out, req->id, req->offset, | |
845 | req->len, handle, handle_len); | |
846 | } | |
847 | ||
848 | buffer_clear(&msg); | |
849 | get_msg(conn->fd_in, &msg); | |
850 | type = buffer_get_char(&msg); | |
851 | id = buffer_get_int(&msg); | |
852 | debug3("Received reply T:%u I:%u R:%d", type, id, max_req); | |
853 | ||
854 | /* Find the request in our queue */ | |
855 | for (req = TAILQ_FIRST(&requests); | |
856 | req != NULL && req->id != id; | |
857 | req = TAILQ_NEXT(req, tq)) | |
858 | ; | |
859 | if (req == NULL) | |
860 | fatal("Unexpected reply %u", id); | |
861 | ||
862 | switch (type) { | |
863 | case SSH2_FXP_STATUS: | |
864 | status = buffer_get_int(&msg); | |
865 | if (status != SSH2_FX_EOF) | |
866 | read_error = 1; | |
867 | max_req = 0; | |
868 | TAILQ_REMOVE(&requests, req, tq); | |
869 | xfree(req); | |
870 | num_req--; | |
871 | break; | |
872 | case SSH2_FXP_DATA: | |
873 | data = buffer_get_string(&msg, &len); | |
874 | debug3("Received data %llu -> %llu", | |
875 | (unsigned long long)req->offset, | |
876 | (unsigned long long)req->offset + len - 1); | |
877 | if (len > req->len) | |
878 | fatal("Received more data than asked for " | |
879 | "%u > %u", len, req->len); | |
880 | if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || | |
881 | atomicio(vwrite, local_fd, data, len) != len) && | |
882 | !write_error) { | |
883 | write_errno = errno; | |
884 | write_error = 1; | |
885 | max_req = 0; | |
886 | } | |
887 | progress_counter += len; | |
888 | xfree(data); | |
889 | ||
890 | if (len == req->len) { | |
891 | TAILQ_REMOVE(&requests, req, tq); | |
892 | xfree(req); | |
893 | num_req--; | |
894 | } else { | |
895 | /* Resend the request for the missing data */ | |
896 | debug3("Short data block, re-requesting " | |
897 | "%llu -> %llu (%2d)", | |
898 | (unsigned long long)req->offset + len, | |
899 | (unsigned long long)req->offset + | |
900 | req->len - 1, num_req); | |
901 | req->id = conn->msg_id++; | |
902 | req->len -= len; | |
903 | req->offset += len; | |
904 | send_read_request(conn->fd_out, req->id, | |
905 | req->offset, req->len, handle, handle_len); | |
906 | /* Reduce the request size */ | |
907 | if (len < buflen) | |
908 | buflen = MAX(MIN_READ_SIZE, len); | |
909 | } | |
910 | if (max_req > 0) { /* max_req = 0 iff EOF received */ | |
911 | if (size > 0 && offset > size) { | |
912 | /* Only one request at a time | |
913 | * after the expected EOF */ | |
914 | debug3("Finish at %llu (%2d)", | |
915 | (unsigned long long)offset, | |
916 | num_req); | |
917 | max_req = 1; | |
918 | } else if (max_req <= conn->num_requests) { | |
919 | ++max_req; | |
920 | } | |
921 | } | |
922 | break; | |
923 | default: | |
924 | fatal("Expected SSH2_FXP_DATA(%u) packet, got %u", | |
925 | SSH2_FXP_DATA, type); | |
926 | } | |
927 | } | |
928 | ||
929 | if (showprogress && size) | |
930 | stop_progress_meter(); | |
931 | ||
932 | /* Sanity check */ | |
933 | if (TAILQ_FIRST(&requests) != NULL) | |
934 | fatal("Transfer complete, but requests still in queue"); | |
935 | ||
936 | if (read_error) { | |
937 | error("Couldn't read from remote file \"%s\" : %s", | |
938 | remote_path, fx2txt(status)); | |
939 | do_close(conn, handle, handle_len); | |
940 | } else if (write_error) { | |
941 | error("Couldn't write to \"%s\": %s", local_path, | |
942 | strerror(write_errno)); | |
943 | status = -1; | |
944 | do_close(conn, handle, handle_len); | |
945 | } else { | |
946 | status = do_close(conn, handle, handle_len); | |
947 | ||
948 | /* Override umask and utimes if asked */ | |
949 | #ifdef HAVE_FCHMOD | |
950 | if (pflag && fchmod(local_fd, mode) == -1) | |
951 | #else | |
952 | if (pflag && chmod(local_path, mode) == -1) | |
953 | #endif /* HAVE_FCHMOD */ | |
954 | error("Couldn't set mode on \"%s\": %s", local_path, | |
955 | strerror(errno)); | |
956 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
957 | struct timeval tv[2]; | |
958 | tv[0].tv_sec = a->atime; | |
959 | tv[1].tv_sec = a->mtime; | |
960 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
961 | if (utimes(local_path, tv) == -1) | |
962 | error("Can't set times on \"%s\": %s", | |
963 | local_path, strerror(errno)); | |
964 | } | |
965 | } | |
966 | close(local_fd); | |
967 | buffer_free(&msg); | |
968 | xfree(handle); | |
969 | ||
970 | return(status); | |
971 | } | |
972 | ||
973 | int | |
974 | do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, | |
975 | int pflag) | |
976 | { | |
977 | int local_fd, status; | |
978 | u_int handle_len, id, type; | |
979 | u_int64_t offset; | |
980 | char *handle, *data; | |
981 | Buffer msg; | |
982 | struct stat sb; | |
983 | Attrib a; | |
984 | u_int32_t startid; | |
985 | u_int32_t ackid; | |
986 | struct outstanding_ack { | |
987 | u_int id; | |
988 | u_int len; | |
989 | u_int64_t offset; | |
990 | TAILQ_ENTRY(outstanding_ack) tq; | |
991 | }; | |
992 | TAILQ_HEAD(ackhead, outstanding_ack) acks; | |
993 | struct outstanding_ack *ack = NULL; | |
994 | ||
995 | TAILQ_INIT(&acks); | |
996 | ||
997 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
998 | error("Couldn't open local file \"%s\" for reading: %s", | |
999 | local_path, strerror(errno)); | |
1000 | return(-1); | |
1001 | } | |
1002 | if (fstat(local_fd, &sb) == -1) { | |
1003 | error("Couldn't fstat local file \"%s\": %s", | |
1004 | local_path, strerror(errno)); | |
1005 | close(local_fd); | |
1006 | return(-1); | |
1007 | } | |
1008 | if (!S_ISREG(sb.st_mode)) { | |
1009 | error("%s is not a regular file", local_path); | |
1010 | close(local_fd); | |
1011 | return(-1); | |
1012 | } | |
1013 | stat_to_attrib(&sb, &a); | |
1014 | ||
1015 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
1016 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
1017 | a.perm &= 0777; | |
1018 | if (!pflag) | |
1019 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
1020 | ||
1021 | buffer_init(&msg); | |
1022 | ||
1023 | /* Send open request */ | |
1024 | id = conn->msg_id++; | |
1025 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
1026 | buffer_put_int(&msg, id); | |
1027 | buffer_put_cstring(&msg, remote_path); | |
1028 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
1029 | encode_attrib(&msg, &a); | |
1030 | send_msg(conn->fd_out, &msg); | |
1031 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
1032 | ||
1033 | buffer_clear(&msg); | |
1034 | ||
1035 | handle = get_handle(conn->fd_in, id, &handle_len); | |
1036 | if (handle == NULL) { | |
1037 | close(local_fd); | |
1038 | buffer_free(&msg); | |
1039 | return(-1); | |
1040 | } | |
1041 | ||
1042 | startid = ackid = id + 1; | |
1043 | data = xmalloc(conn->transfer_buflen); | |
1044 | ||
1045 | /* Read from local and write to remote */ | |
1046 | offset = 0; | |
1047 | if (showprogress) | |
1048 | start_progress_meter(local_path, sb.st_size, &offset); | |
1049 | ||
1050 | for (;;) { | |
1051 | int len; | |
1052 | ||
1053 | /* | |
1054 | * Can't use atomicio here because it returns 0 on EOF, | |
1055 | * thus losing the last block of the file. | |
1056 | * Simulate an EOF on interrupt, allowing ACKs from the | |
1057 | * server to drain. | |
1058 | */ | |
1059 | if (interrupted) | |
1060 | len = 0; | |
1061 | else do | |
1062 | len = read(local_fd, data, conn->transfer_buflen); | |
1063 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
1064 | ||
1065 | if (len == -1) | |
1066 | fatal("Couldn't read from \"%s\": %s", local_path, | |
1067 | strerror(errno)); | |
1068 | ||
1069 | if (len != 0) { | |
1070 | ack = xmalloc(sizeof(*ack)); | |
1071 | ack->id = ++id; | |
1072 | ack->offset = offset; | |
1073 | ack->len = len; | |
1074 | TAILQ_INSERT_TAIL(&acks, ack, tq); | |
1075 | ||
1076 | buffer_clear(&msg); | |
1077 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
1078 | buffer_put_int(&msg, ack->id); | |
1079 | buffer_put_string(&msg, handle, handle_len); | |
1080 | buffer_put_int64(&msg, offset); | |
1081 | buffer_put_string(&msg, data, len); | |
1082 | send_msg(conn->fd_out, &msg); | |
1083 | debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", | |
1084 | id, (unsigned long long)offset, len); | |
1085 | } else if (TAILQ_FIRST(&acks) == NULL) | |
1086 | break; | |
1087 | ||
1088 | if (ack == NULL) | |
1089 | fatal("Unexpected ACK %u", id); | |
1090 | ||
1091 | if (id == startid || len == 0 || | |
1092 | id - ackid >= conn->num_requests) { | |
1093 | u_int r_id; | |
1094 | ||
1095 | buffer_clear(&msg); | |
1096 | get_msg(conn->fd_in, &msg); | |
1097 | type = buffer_get_char(&msg); | |
1098 | r_id = buffer_get_int(&msg); | |
1099 | ||
1100 | if (type != SSH2_FXP_STATUS) | |
1101 | fatal("Expected SSH2_FXP_STATUS(%d) packet, " | |
1102 | "got %d", SSH2_FXP_STATUS, type); | |
1103 | ||
1104 | status = buffer_get_int(&msg); | |
1105 | debug3("SSH2_FXP_STATUS %d", status); | |
1106 | ||
1107 | /* Find the request in our queue */ | |
1108 | for (ack = TAILQ_FIRST(&acks); | |
1109 | ack != NULL && ack->id != r_id; | |
1110 | ack = TAILQ_NEXT(ack, tq)) | |
1111 | ; | |
1112 | if (ack == NULL) | |
1113 | fatal("Can't find request for ID %u", r_id); | |
1114 | TAILQ_REMOVE(&acks, ack, tq); | |
1115 | ||
1116 | if (status != SSH2_FX_OK) { | |
1117 | error("Couldn't write to remote file \"%s\": %s", | |
1118 | remote_path, fx2txt(status)); | |
1119 | do_close(conn, handle, handle_len); | |
1120 | close(local_fd); | |
1121 | xfree(data); | |
1122 | xfree(ack); | |
1123 | goto done; | |
1124 | } | |
1125 | debug3("In write loop, ack for %u %u bytes at %llu", | |
1126 | ack->id, ack->len, (unsigned long long)ack->offset); | |
1127 | ++ackid; | |
1128 | xfree(ack); | |
1129 | } | |
1130 | offset += len; | |
1131 | } | |
1132 | if (showprogress) | |
1133 | stop_progress_meter(); | |
1134 | xfree(data); | |
1135 | ||
1136 | if (close(local_fd) == -1) { | |
1137 | error("Couldn't close local file \"%s\": %s", local_path, | |
1138 | strerror(errno)); | |
1139 | do_close(conn, handle, handle_len); | |
1140 | status = -1; | |
1141 | goto done; | |
1142 | } | |
1143 | ||
1144 | /* Override umask and utimes if asked */ | |
1145 | if (pflag) | |
1146 | do_fsetstat(conn, handle, handle_len, &a); | |
1147 | ||
1148 | status = do_close(conn, handle, handle_len); | |
1149 | ||
1150 | done: | |
1151 | xfree(handle); | |
1152 | buffer_free(&msg); | |
1153 | return(status); | |
1154 | } |