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1 | /* $OpenBSD: sftp-client.c,v 1.81 2008/03/23 12:54:01 djm Exp $ */ | |
2 | /* | |
3 | * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org> | |
4 | * | |
5 | * Permission to use, copy, modify, and distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | /* XXX: memleaks */ | |
19 | /* XXX: signed vs unsigned */ | |
20 | /* XXX: remove all logging, only return status codes */ | |
21 | /* XXX: copy between two remote sites */ | |
22 | ||
23 | #include "includes.h" | |
24 | ||
25 | #include <sys/types.h> | |
26 | #include <sys/param.h> | |
27 | #include "openbsd-compat/sys-queue.h" | |
28 | #ifdef HAVE_SYS_STAT_H | |
29 | # include <sys/stat.h> | |
30 | #endif | |
31 | #ifdef HAVE_SYS_TIME_H | |
32 | # include <sys/time.h> | |
33 | #endif | |
34 | #include <sys/uio.h> | |
35 | ||
36 | #include <errno.h> | |
37 | #include <fcntl.h> | |
38 | #include <signal.h> | |
39 | #include <stdarg.h> | |
40 | #include <stdio.h> | |
41 | #include <string.h> | |
42 | #include <unistd.h> | |
43 | ||
44 | #include "xmalloc.h" | |
45 | #include "buffer.h" | |
46 | #include "log.h" | |
47 | #include "atomicio.h" | |
48 | #include "progressmeter.h" | |
49 | #include "misc.h" | |
50 | ||
51 | #include "sftp.h" | |
52 | #include "sftp-common.h" | |
53 | #include "sftp-client.h" | |
54 | ||
55 | extern volatile sig_atomic_t interrupted; | |
56 | extern int showprogress; | |
57 | ||
58 | /* Minimum amount of data to read at a time */ | |
59 | #define MIN_READ_SIZE 512 | |
60 | ||
61 | struct sftp_conn { | |
62 | int fd_in; | |
63 | int fd_out; | |
64 | u_int transfer_buflen; | |
65 | u_int num_requests; | |
66 | u_int version; | |
67 | u_int msg_id; | |
68 | #define SFTP_EXT_POSIX_RENAME 1 | |
69 | u_int exts; | |
70 | }; | |
71 | ||
72 | static void | |
73 | send_msg(int fd, Buffer *m) | |
74 | { | |
75 | u_char mlen[4]; | |
76 | struct iovec iov[2]; | |
77 | ||
78 | if (buffer_len(m) > SFTP_MAX_MSG_LENGTH) | |
79 | fatal("Outbound message too long %u", buffer_len(m)); | |
80 | ||
81 | /* Send length first */ | |
82 | put_u32(mlen, buffer_len(m)); | |
83 | iov[0].iov_base = mlen; | |
84 | iov[0].iov_len = sizeof(mlen); | |
85 | iov[1].iov_base = buffer_ptr(m); | |
86 | iov[1].iov_len = buffer_len(m); | |
87 | ||
88 | if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen)) | |
89 | fatal("Couldn't send packet: %s", strerror(errno)); | |
90 | ||
91 | buffer_clear(m); | |
92 | } | |
93 | ||
94 | static void | |
95 | get_msg(int fd, Buffer *m) | |
96 | { | |
97 | u_int msg_len; | |
98 | ||
99 | buffer_append_space(m, 4); | |
100 | if (atomicio(read, fd, buffer_ptr(m), 4) != 4) { | |
101 | if (errno == EPIPE) | |
102 | fatal("Connection closed"); | |
103 | else | |
104 | fatal("Couldn't read packet: %s", strerror(errno)); | |
105 | } | |
106 | ||
107 | msg_len = buffer_get_int(m); | |
108 | if (msg_len > SFTP_MAX_MSG_LENGTH) | |
109 | fatal("Received message too long %u", msg_len); | |
110 | ||
111 | buffer_append_space(m, msg_len); | |
112 | if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) { | |
113 | if (errno == EPIPE) | |
114 | fatal("Connection closed"); | |
115 | else | |
116 | fatal("Read packet: %s", strerror(errno)); | |
117 | } | |
118 | } | |
119 | ||
120 | static void | |
121 | send_string_request(int fd, u_int id, u_int code, char *s, | |
122 | u_int len) | |
123 | { | |
124 | Buffer msg; | |
125 | ||
126 | buffer_init(&msg); | |
127 | buffer_put_char(&msg, code); | |
128 | buffer_put_int(&msg, id); | |
129 | buffer_put_string(&msg, s, len); | |
130 | send_msg(fd, &msg); | |
131 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
132 | buffer_free(&msg); | |
133 | } | |
134 | ||
135 | static void | |
136 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
137 | u_int len, Attrib *a) | |
138 | { | |
139 | Buffer msg; | |
140 | ||
141 | buffer_init(&msg); | |
142 | buffer_put_char(&msg, code); | |
143 | buffer_put_int(&msg, id); | |
144 | buffer_put_string(&msg, s, len); | |
145 | encode_attrib(&msg, a); | |
146 | send_msg(fd, &msg); | |
147 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
148 | buffer_free(&msg); | |
149 | } | |
150 | ||
151 | static u_int | |
152 | get_status(int fd, u_int expected_id) | |
153 | { | |
154 | Buffer msg; | |
155 | u_int type, id, status; | |
156 | ||
157 | buffer_init(&msg); | |
158 | get_msg(fd, &msg); | |
159 | type = buffer_get_char(&msg); | |
160 | id = buffer_get_int(&msg); | |
161 | ||
162 | if (id != expected_id) | |
163 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
164 | if (type != SSH2_FXP_STATUS) | |
165 | fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", | |
166 | SSH2_FXP_STATUS, type); | |
167 | ||
168 | status = buffer_get_int(&msg); | |
169 | buffer_free(&msg); | |
170 | ||
171 | debug3("SSH2_FXP_STATUS %u", status); | |
172 | ||
173 | return(status); | |
174 | } | |
175 | ||
176 | static char * | |
177 | get_handle(int fd, u_int expected_id, u_int *len) | |
178 | { | |
179 | Buffer msg; | |
180 | u_int type, id; | |
181 | char *handle; | |
182 | ||
183 | buffer_init(&msg); | |
184 | get_msg(fd, &msg); | |
185 | type = buffer_get_char(&msg); | |
186 | id = buffer_get_int(&msg); | |
187 | ||
188 | if (id != expected_id) | |
189 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
190 | if (type == SSH2_FXP_STATUS) { | |
191 | int status = buffer_get_int(&msg); | |
192 | ||
193 | error("Couldn't get handle: %s", fx2txt(status)); | |
194 | buffer_free(&msg); | |
195 | return(NULL); | |
196 | } else if (type != SSH2_FXP_HANDLE) | |
197 | fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u", | |
198 | SSH2_FXP_HANDLE, type); | |
199 | ||
200 | handle = buffer_get_string(&msg, len); | |
201 | buffer_free(&msg); | |
202 | ||
203 | return(handle); | |
204 | } | |
205 | ||
206 | static Attrib * | |
207 | get_decode_stat(int fd, u_int expected_id, int quiet) | |
208 | { | |
209 | Buffer msg; | |
210 | u_int type, id; | |
211 | Attrib *a; | |
212 | ||
213 | buffer_init(&msg); | |
214 | get_msg(fd, &msg); | |
215 | ||
216 | type = buffer_get_char(&msg); | |
217 | id = buffer_get_int(&msg); | |
218 | ||
219 | debug3("Received stat reply T:%u I:%u", type, id); | |
220 | if (id != expected_id) | |
221 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
222 | if (type == SSH2_FXP_STATUS) { | |
223 | int status = buffer_get_int(&msg); | |
224 | ||
225 | if (quiet) | |
226 | debug("Couldn't stat remote file: %s", fx2txt(status)); | |
227 | else | |
228 | error("Couldn't stat remote file: %s", fx2txt(status)); | |
229 | buffer_free(&msg); | |
230 | return(NULL); | |
231 | } else if (type != SSH2_FXP_ATTRS) { | |
232 | fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", | |
233 | SSH2_FXP_ATTRS, type); | |
234 | } | |
235 | a = decode_attrib(&msg); | |
236 | buffer_free(&msg); | |
237 | ||
238 | return(a); | |
239 | } | |
240 | ||
241 | struct sftp_conn * | |
242 | do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests) | |
243 | { | |
244 | u_int type, exts = 0; | |
245 | int version; | |
246 | Buffer msg; | |
247 | struct sftp_conn *ret; | |
248 | ||
249 | buffer_init(&msg); | |
250 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
251 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
252 | send_msg(fd_out, &msg); | |
253 | ||
254 | buffer_clear(&msg); | |
255 | ||
256 | get_msg(fd_in, &msg); | |
257 | ||
258 | /* Expecting a VERSION reply */ | |
259 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
260 | error("Invalid packet back from SSH2_FXP_INIT (type %u)", | |
261 | type); | |
262 | buffer_free(&msg); | |
263 | return(NULL); | |
264 | } | |
265 | version = buffer_get_int(&msg); | |
266 | ||
267 | debug2("Remote version: %d", version); | |
268 | ||
269 | /* Check for extensions */ | |
270 | while (buffer_len(&msg) > 0) { | |
271 | char *name = buffer_get_string(&msg, NULL); | |
272 | char *value = buffer_get_string(&msg, NULL); | |
273 | ||
274 | debug2("Init extension: \"%s\"", name); | |
275 | if (strcmp(name, "posix-rename@openssh.com") == 0) | |
276 | exts |= SFTP_EXT_POSIX_RENAME; | |
277 | xfree(name); | |
278 | xfree(value); | |
279 | } | |
280 | ||
281 | buffer_free(&msg); | |
282 | ||
283 | ret = xmalloc(sizeof(*ret)); | |
284 | ret->fd_in = fd_in; | |
285 | ret->fd_out = fd_out; | |
286 | ret->transfer_buflen = transfer_buflen; | |
287 | ret->num_requests = num_requests; | |
288 | ret->version = version; | |
289 | ret->msg_id = 1; | |
290 | ret->exts = exts; | |
291 | ||
292 | /* Some filexfer v.0 servers don't support large packets */ | |
293 | if (version == 0) | |
294 | ret->transfer_buflen = MIN(ret->transfer_buflen, 20480); | |
295 | ||
296 | return(ret); | |
297 | } | |
298 | ||
299 | u_int | |
300 | sftp_proto_version(struct sftp_conn *conn) | |
301 | { | |
302 | return(conn->version); | |
303 | } | |
304 | ||
305 | int | |
306 | do_close(struct sftp_conn *conn, char *handle, u_int handle_len) | |
307 | { | |
308 | u_int id, status; | |
309 | Buffer msg; | |
310 | ||
311 | buffer_init(&msg); | |
312 | ||
313 | id = conn->msg_id++; | |
314 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
315 | buffer_put_int(&msg, id); | |
316 | buffer_put_string(&msg, handle, handle_len); | |
317 | send_msg(conn->fd_out, &msg); | |
318 | debug3("Sent message SSH2_FXP_CLOSE I:%u", id); | |
319 | ||
320 | status = get_status(conn->fd_in, id); | |
321 | if (status != SSH2_FX_OK) | |
322 | error("Couldn't close file: %s", fx2txt(status)); | |
323 | ||
324 | buffer_free(&msg); | |
325 | ||
326 | return(status); | |
327 | } | |
328 | ||
329 | ||
330 | static int | |
331 | do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, | |
332 | SFTP_DIRENT ***dir) | |
333 | { | |
334 | Buffer msg; | |
335 | u_int count, type, id, handle_len, i, expected_id, ents = 0; | |
336 | char *handle; | |
337 | ||
338 | id = conn->msg_id++; | |
339 | ||
340 | buffer_init(&msg); | |
341 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
342 | buffer_put_int(&msg, id); | |
343 | buffer_put_cstring(&msg, path); | |
344 | send_msg(conn->fd_out, &msg); | |
345 | ||
346 | buffer_clear(&msg); | |
347 | ||
348 | handle = get_handle(conn->fd_in, id, &handle_len); | |
349 | if (handle == NULL) | |
350 | return(-1); | |
351 | ||
352 | if (dir) { | |
353 | ents = 0; | |
354 | *dir = xmalloc(sizeof(**dir)); | |
355 | (*dir)[0] = NULL; | |
356 | } | |
357 | ||
358 | for (; !interrupted;) { | |
359 | id = expected_id = conn->msg_id++; | |
360 | ||
361 | debug3("Sending SSH2_FXP_READDIR I:%u", id); | |
362 | ||
363 | buffer_clear(&msg); | |
364 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
365 | buffer_put_int(&msg, id); | |
366 | buffer_put_string(&msg, handle, handle_len); | |
367 | send_msg(conn->fd_out, &msg); | |
368 | ||
369 | buffer_clear(&msg); | |
370 | ||
371 | get_msg(conn->fd_in, &msg); | |
372 | ||
373 | type = buffer_get_char(&msg); | |
374 | id = buffer_get_int(&msg); | |
375 | ||
376 | debug3("Received reply T:%u I:%u", type, id); | |
377 | ||
378 | if (id != expected_id) | |
379 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
380 | ||
381 | if (type == SSH2_FXP_STATUS) { | |
382 | int status = buffer_get_int(&msg); | |
383 | ||
384 | debug3("Received SSH2_FXP_STATUS %d", status); | |
385 | ||
386 | if (status == SSH2_FX_EOF) { | |
387 | break; | |
388 | } else { | |
389 | error("Couldn't read directory: %s", | |
390 | fx2txt(status)); | |
391 | do_close(conn, handle, handle_len); | |
392 | xfree(handle); | |
393 | return(status); | |
394 | } | |
395 | } else if (type != SSH2_FXP_NAME) | |
396 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
397 | SSH2_FXP_NAME, type); | |
398 | ||
399 | count = buffer_get_int(&msg); | |
400 | if (count == 0) | |
401 | break; | |
402 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
403 | for (i = 0; i < count; i++) { | |
404 | char *filename, *longname; | |
405 | Attrib *a; | |
406 | ||
407 | filename = buffer_get_string(&msg, NULL); | |
408 | longname = buffer_get_string(&msg, NULL); | |
409 | a = decode_attrib(&msg); | |
410 | ||
411 | if (printflag) | |
412 | printf("%s\n", longname); | |
413 | ||
414 | if (dir) { | |
415 | *dir = xrealloc(*dir, ents + 2, sizeof(**dir)); | |
416 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
417 | (*dir)[ents]->filename = xstrdup(filename); | |
418 | (*dir)[ents]->longname = xstrdup(longname); | |
419 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
420 | (*dir)[++ents] = NULL; | |
421 | } | |
422 | ||
423 | xfree(filename); | |
424 | xfree(longname); | |
425 | } | |
426 | } | |
427 | ||
428 | buffer_free(&msg); | |
429 | do_close(conn, handle, handle_len); | |
430 | xfree(handle); | |
431 | ||
432 | /* Don't return partial matches on interrupt */ | |
433 | if (interrupted && dir != NULL && *dir != NULL) { | |
434 | free_sftp_dirents(*dir); | |
435 | *dir = xmalloc(sizeof(**dir)); | |
436 | **dir = NULL; | |
437 | } | |
438 | ||
439 | return(0); | |
440 | } | |
441 | ||
442 | int | |
443 | do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) | |
444 | { | |
445 | return(do_lsreaddir(conn, path, 0, dir)); | |
446 | } | |
447 | ||
448 | void free_sftp_dirents(SFTP_DIRENT **s) | |
449 | { | |
450 | int i; | |
451 | ||
452 | for (i = 0; s[i]; i++) { | |
453 | xfree(s[i]->filename); | |
454 | xfree(s[i]->longname); | |
455 | xfree(s[i]); | |
456 | } | |
457 | xfree(s); | |
458 | } | |
459 | ||
460 | int | |
461 | do_rm(struct sftp_conn *conn, char *path) | |
462 | { | |
463 | u_int status, id; | |
464 | ||
465 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
466 | ||
467 | id = conn->msg_id++; | |
468 | send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path, | |
469 | strlen(path)); | |
470 | status = get_status(conn->fd_in, id); | |
471 | if (status != SSH2_FX_OK) | |
472 | error("Couldn't delete file: %s", fx2txt(status)); | |
473 | return(status); | |
474 | } | |
475 | ||
476 | int | |
477 | do_mkdir(struct sftp_conn *conn, char *path, Attrib *a) | |
478 | { | |
479 | u_int status, id; | |
480 | ||
481 | id = conn->msg_id++; | |
482 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path, | |
483 | strlen(path), a); | |
484 | ||
485 | status = get_status(conn->fd_in, id); | |
486 | if (status != SSH2_FX_OK) | |
487 | error("Couldn't create directory: %s", fx2txt(status)); | |
488 | ||
489 | return(status); | |
490 | } | |
491 | ||
492 | int | |
493 | do_rmdir(struct sftp_conn *conn, char *path) | |
494 | { | |
495 | u_int status, id; | |
496 | ||
497 | id = conn->msg_id++; | |
498 | send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path, | |
499 | strlen(path)); | |
500 | ||
501 | status = get_status(conn->fd_in, id); | |
502 | if (status != SSH2_FX_OK) | |
503 | error("Couldn't remove directory: %s", fx2txt(status)); | |
504 | ||
505 | return(status); | |
506 | } | |
507 | ||
508 | Attrib * | |
509 | do_stat(struct sftp_conn *conn, char *path, int quiet) | |
510 | { | |
511 | u_int id; | |
512 | ||
513 | id = conn->msg_id++; | |
514 | ||
515 | send_string_request(conn->fd_out, id, | |
516 | conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT, | |
517 | path, strlen(path)); | |
518 | ||
519 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
520 | } | |
521 | ||
522 | Attrib * | |
523 | do_lstat(struct sftp_conn *conn, char *path, int quiet) | |
524 | { | |
525 | u_int id; | |
526 | ||
527 | if (conn->version == 0) { | |
528 | if (quiet) | |
529 | debug("Server version does not support lstat operation"); | |
530 | else | |
531 | logit("Server version does not support lstat operation"); | |
532 | return(do_stat(conn, path, quiet)); | |
533 | } | |
534 | ||
535 | id = conn->msg_id++; | |
536 | send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path, | |
537 | strlen(path)); | |
538 | ||
539 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
540 | } | |
541 | ||
542 | #ifdef notyet | |
543 | Attrib * | |
544 | do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) | |
545 | { | |
546 | u_int id; | |
547 | ||
548 | id = conn->msg_id++; | |
549 | send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle, | |
550 | handle_len); | |
551 | ||
552 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
553 | } | |
554 | #endif | |
555 | ||
556 | int | |
557 | do_setstat(struct sftp_conn *conn, char *path, Attrib *a) | |
558 | { | |
559 | u_int status, id; | |
560 | ||
561 | id = conn->msg_id++; | |
562 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path, | |
563 | strlen(path), a); | |
564 | ||
565 | status = get_status(conn->fd_in, id); | |
566 | if (status != SSH2_FX_OK) | |
567 | error("Couldn't setstat on \"%s\": %s", path, | |
568 | fx2txt(status)); | |
569 | ||
570 | return(status); | |
571 | } | |
572 | ||
573 | int | |
574 | do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, | |
575 | Attrib *a) | |
576 | { | |
577 | u_int status, id; | |
578 | ||
579 | id = conn->msg_id++; | |
580 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
581 | handle_len, a); | |
582 | ||
583 | status = get_status(conn->fd_in, id); | |
584 | if (status != SSH2_FX_OK) | |
585 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
586 | ||
587 | return(status); | |
588 | } | |
589 | ||
590 | char * | |
591 | do_realpath(struct sftp_conn *conn, char *path) | |
592 | { | |
593 | Buffer msg; | |
594 | u_int type, expected_id, count, id; | |
595 | char *filename, *longname; | |
596 | Attrib *a; | |
597 | ||
598 | expected_id = id = conn->msg_id++; | |
599 | send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path, | |
600 | strlen(path)); | |
601 | ||
602 | buffer_init(&msg); | |
603 | ||
604 | get_msg(conn->fd_in, &msg); | |
605 | type = buffer_get_char(&msg); | |
606 | id = buffer_get_int(&msg); | |
607 | ||
608 | if (id != expected_id) | |
609 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
610 | ||
611 | if (type == SSH2_FXP_STATUS) { | |
612 | u_int status = buffer_get_int(&msg); | |
613 | ||
614 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
615 | return(NULL); | |
616 | } else if (type != SSH2_FXP_NAME) | |
617 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
618 | SSH2_FXP_NAME, type); | |
619 | ||
620 | count = buffer_get_int(&msg); | |
621 | if (count != 1) | |
622 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
623 | ||
624 | filename = buffer_get_string(&msg, NULL); | |
625 | longname = buffer_get_string(&msg, NULL); | |
626 | a = decode_attrib(&msg); | |
627 | ||
628 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
629 | ||
630 | xfree(longname); | |
631 | ||
632 | buffer_free(&msg); | |
633 | ||
634 | return(filename); | |
635 | } | |
636 | ||
637 | int | |
638 | do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) | |
639 | { | |
640 | Buffer msg; | |
641 | u_int status, id; | |
642 | ||
643 | buffer_init(&msg); | |
644 | ||
645 | /* Send rename request */ | |
646 | id = conn->msg_id++; | |
647 | if ((conn->exts & SFTP_EXT_POSIX_RENAME)) { | |
648 | buffer_put_char(&msg, SSH2_FXP_EXTENDED); | |
649 | buffer_put_int(&msg, id); | |
650 | buffer_put_cstring(&msg, "posix-rename@openssh.com"); | |
651 | } else { | |
652 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
653 | buffer_put_int(&msg, id); | |
654 | } | |
655 | buffer_put_cstring(&msg, oldpath); | |
656 | buffer_put_cstring(&msg, newpath); | |
657 | send_msg(conn->fd_out, &msg); | |
658 | debug3("Sent message %s \"%s\" -> \"%s\"", | |
659 | (conn->exts & SFTP_EXT_POSIX_RENAME) ? "posix-rename@openssh.com" : | |
660 | "SSH2_FXP_RENAME", oldpath, newpath); | |
661 | buffer_free(&msg); | |
662 | ||
663 | status = get_status(conn->fd_in, id); | |
664 | if (status != SSH2_FX_OK) | |
665 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, | |
666 | newpath, fx2txt(status)); | |
667 | ||
668 | return(status); | |
669 | } | |
670 | ||
671 | int | |
672 | do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) | |
673 | { | |
674 | Buffer msg; | |
675 | u_int status, id; | |
676 | ||
677 | if (conn->version < 3) { | |
678 | error("This server does not support the symlink operation"); | |
679 | return(SSH2_FX_OP_UNSUPPORTED); | |
680 | } | |
681 | ||
682 | buffer_init(&msg); | |
683 | ||
684 | /* Send symlink request */ | |
685 | id = conn->msg_id++; | |
686 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
687 | buffer_put_int(&msg, id); | |
688 | buffer_put_cstring(&msg, oldpath); | |
689 | buffer_put_cstring(&msg, newpath); | |
690 | send_msg(conn->fd_out, &msg); | |
691 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
692 | newpath); | |
693 | buffer_free(&msg); | |
694 | ||
695 | status = get_status(conn->fd_in, id); | |
696 | if (status != SSH2_FX_OK) | |
697 | error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, | |
698 | newpath, fx2txt(status)); | |
699 | ||
700 | return(status); | |
701 | } | |
702 | ||
703 | #ifdef notyet | |
704 | char * | |
705 | do_readlink(struct sftp_conn *conn, char *path) | |
706 | { | |
707 | Buffer msg; | |
708 | u_int type, expected_id, count, id; | |
709 | char *filename, *longname; | |
710 | Attrib *a; | |
711 | ||
712 | expected_id = id = conn->msg_id++; | |
713 | send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path, | |
714 | strlen(path)); | |
715 | ||
716 | buffer_init(&msg); | |
717 | ||
718 | get_msg(conn->fd_in, &msg); | |
719 | type = buffer_get_char(&msg); | |
720 | id = buffer_get_int(&msg); | |
721 | ||
722 | if (id != expected_id) | |
723 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
724 | ||
725 | if (type == SSH2_FXP_STATUS) { | |
726 | u_int status = buffer_get_int(&msg); | |
727 | ||
728 | error("Couldn't readlink: %s", fx2txt(status)); | |
729 | return(NULL); | |
730 | } else if (type != SSH2_FXP_NAME) | |
731 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
732 | SSH2_FXP_NAME, type); | |
733 | ||
734 | count = buffer_get_int(&msg); | |
735 | if (count != 1) | |
736 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
737 | ||
738 | filename = buffer_get_string(&msg, NULL); | |
739 | longname = buffer_get_string(&msg, NULL); | |
740 | a = decode_attrib(&msg); | |
741 | ||
742 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
743 | ||
744 | xfree(longname); | |
745 | ||
746 | buffer_free(&msg); | |
747 | ||
748 | return(filename); | |
749 | } | |
750 | #endif | |
751 | ||
752 | static void | |
753 | send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len, | |
754 | char *handle, u_int handle_len) | |
755 | { | |
756 | Buffer msg; | |
757 | ||
758 | buffer_init(&msg); | |
759 | buffer_clear(&msg); | |
760 | buffer_put_char(&msg, SSH2_FXP_READ); | |
761 | buffer_put_int(&msg, id); | |
762 | buffer_put_string(&msg, handle, handle_len); | |
763 | buffer_put_int64(&msg, offset); | |
764 | buffer_put_int(&msg, len); | |
765 | send_msg(fd_out, &msg); | |
766 | buffer_free(&msg); | |
767 | } | |
768 | ||
769 | int | |
770 | do_download(struct sftp_conn *conn, char *remote_path, char *local_path, | |
771 | int pflag) | |
772 | { | |
773 | Attrib junk, *a; | |
774 | Buffer msg; | |
775 | char *handle; | |
776 | int local_fd, status = 0, write_error; | |
777 | int read_error, write_errno; | |
778 | u_int64_t offset, size; | |
779 | u_int handle_len, mode, type, id, buflen, num_req, max_req; | |
780 | off_t progress_counter; | |
781 | struct request { | |
782 | u_int id; | |
783 | u_int len; | |
784 | u_int64_t offset; | |
785 | TAILQ_ENTRY(request) tq; | |
786 | }; | |
787 | TAILQ_HEAD(reqhead, request) requests; | |
788 | struct request *req; | |
789 | ||
790 | TAILQ_INIT(&requests); | |
791 | ||
792 | a = do_stat(conn, remote_path, 0); | |
793 | if (a == NULL) | |
794 | return(-1); | |
795 | ||
796 | /* XXX: should we preserve set[ug]id? */ | |
797 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
798 | mode = a->perm & 0777; | |
799 | else | |
800 | mode = 0666; | |
801 | ||
802 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
803 | (!S_ISREG(a->perm))) { | |
804 | error("Cannot download non-regular file: %s", remote_path); | |
805 | return(-1); | |
806 | } | |
807 | ||
808 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) | |
809 | size = a->size; | |
810 | else | |
811 | size = 0; | |
812 | ||
813 | buflen = conn->transfer_buflen; | |
814 | buffer_init(&msg); | |
815 | ||
816 | /* Send open request */ | |
817 | id = conn->msg_id++; | |
818 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
819 | buffer_put_int(&msg, id); | |
820 | buffer_put_cstring(&msg, remote_path); | |
821 | buffer_put_int(&msg, SSH2_FXF_READ); | |
822 | attrib_clear(&junk); /* Send empty attributes */ | |
823 | encode_attrib(&msg, &junk); | |
824 | send_msg(conn->fd_out, &msg); | |
825 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
826 | ||
827 | handle = get_handle(conn->fd_in, id, &handle_len); | |
828 | if (handle == NULL) { | |
829 | buffer_free(&msg); | |
830 | return(-1); | |
831 | } | |
832 | ||
833 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, | |
834 | mode | S_IWRITE); | |
835 | if (local_fd == -1) { | |
836 | error("Couldn't open local file \"%s\" for writing: %s", | |
837 | local_path, strerror(errno)); | |
838 | do_close(conn, handle, handle_len); | |
839 | buffer_free(&msg); | |
840 | xfree(handle); | |
841 | return(-1); | |
842 | } | |
843 | ||
844 | /* Read from remote and write to local */ | |
845 | write_error = read_error = write_errno = num_req = offset = 0; | |
846 | max_req = 1; | |
847 | progress_counter = 0; | |
848 | ||
849 | if (showprogress && size != 0) | |
850 | start_progress_meter(remote_path, size, &progress_counter); | |
851 | ||
852 | while (num_req > 0 || max_req > 0) { | |
853 | char *data; | |
854 | u_int len; | |
855 | ||
856 | /* | |
857 | * Simulate EOF on interrupt: stop sending new requests and | |
858 | * allow outstanding requests to drain gracefully | |
859 | */ | |
860 | if (interrupted) { | |
861 | if (num_req == 0) /* If we haven't started yet... */ | |
862 | break; | |
863 | max_req = 0; | |
864 | } | |
865 | ||
866 | /* Send some more requests */ | |
867 | while (num_req < max_req) { | |
868 | debug3("Request range %llu -> %llu (%d/%d)", | |
869 | (unsigned long long)offset, | |
870 | (unsigned long long)offset + buflen - 1, | |
871 | num_req, max_req); | |
872 | req = xmalloc(sizeof(*req)); | |
873 | req->id = conn->msg_id++; | |
874 | req->len = buflen; | |
875 | req->offset = offset; | |
876 | offset += buflen; | |
877 | num_req++; | |
878 | TAILQ_INSERT_TAIL(&requests, req, tq); | |
879 | send_read_request(conn->fd_out, req->id, req->offset, | |
880 | req->len, handle, handle_len); | |
881 | } | |
882 | ||
883 | buffer_clear(&msg); | |
884 | get_msg(conn->fd_in, &msg); | |
885 | type = buffer_get_char(&msg); | |
886 | id = buffer_get_int(&msg); | |
887 | debug3("Received reply T:%u I:%u R:%d", type, id, max_req); | |
888 | ||
889 | /* Find the request in our queue */ | |
890 | for (req = TAILQ_FIRST(&requests); | |
891 | req != NULL && req->id != id; | |
892 | req = TAILQ_NEXT(req, tq)) | |
893 | ; | |
894 | if (req == NULL) | |
895 | fatal("Unexpected reply %u", id); | |
896 | ||
897 | switch (type) { | |
898 | case SSH2_FXP_STATUS: | |
899 | status = buffer_get_int(&msg); | |
900 | if (status != SSH2_FX_EOF) | |
901 | read_error = 1; | |
902 | max_req = 0; | |
903 | TAILQ_REMOVE(&requests, req, tq); | |
904 | xfree(req); | |
905 | num_req--; | |
906 | break; | |
907 | case SSH2_FXP_DATA: | |
908 | data = buffer_get_string(&msg, &len); | |
909 | debug3("Received data %llu -> %llu", | |
910 | (unsigned long long)req->offset, | |
911 | (unsigned long long)req->offset + len - 1); | |
912 | if (len > req->len) | |
913 | fatal("Received more data than asked for " | |
914 | "%u > %u", len, req->len); | |
915 | if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || | |
916 | atomicio(vwrite, local_fd, data, len) != len) && | |
917 | !write_error) { | |
918 | write_errno = errno; | |
919 | write_error = 1; | |
920 | max_req = 0; | |
921 | } | |
922 | progress_counter += len; | |
923 | xfree(data); | |
924 | ||
925 | if (len == req->len) { | |
926 | TAILQ_REMOVE(&requests, req, tq); | |
927 | xfree(req); | |
928 | num_req--; | |
929 | } else { | |
930 | /* Resend the request for the missing data */ | |
931 | debug3("Short data block, re-requesting " | |
932 | "%llu -> %llu (%2d)", | |
933 | (unsigned long long)req->offset + len, | |
934 | (unsigned long long)req->offset + | |
935 | req->len - 1, num_req); | |
936 | req->id = conn->msg_id++; | |
937 | req->len -= len; | |
938 | req->offset += len; | |
939 | send_read_request(conn->fd_out, req->id, | |
940 | req->offset, req->len, handle, handle_len); | |
941 | /* Reduce the request size */ | |
942 | if (len < buflen) | |
943 | buflen = MAX(MIN_READ_SIZE, len); | |
944 | } | |
945 | if (max_req > 0) { /* max_req = 0 iff EOF received */ | |
946 | if (size > 0 && offset > size) { | |
947 | /* Only one request at a time | |
948 | * after the expected EOF */ | |
949 | debug3("Finish at %llu (%2d)", | |
950 | (unsigned long long)offset, | |
951 | num_req); | |
952 | max_req = 1; | |
953 | } else if (max_req <= conn->num_requests) { | |
954 | ++max_req; | |
955 | } | |
956 | } | |
957 | break; | |
958 | default: | |
959 | fatal("Expected SSH2_FXP_DATA(%u) packet, got %u", | |
960 | SSH2_FXP_DATA, type); | |
961 | } | |
962 | } | |
963 | ||
964 | if (showprogress && size) | |
965 | stop_progress_meter(); | |
966 | ||
967 | /* Sanity check */ | |
968 | if (TAILQ_FIRST(&requests) != NULL) | |
969 | fatal("Transfer complete, but requests still in queue"); | |
970 | ||
971 | if (read_error) { | |
972 | error("Couldn't read from remote file \"%s\" : %s", | |
973 | remote_path, fx2txt(status)); | |
974 | do_close(conn, handle, handle_len); | |
975 | } else if (write_error) { | |
976 | error("Couldn't write to \"%s\": %s", local_path, | |
977 | strerror(write_errno)); | |
978 | status = -1; | |
979 | do_close(conn, handle, handle_len); | |
980 | } else { | |
981 | status = do_close(conn, handle, handle_len); | |
982 | ||
983 | /* Override umask and utimes if asked */ | |
984 | #ifdef HAVE_FCHMOD | |
985 | if (pflag && fchmod(local_fd, mode) == -1) | |
986 | #else | |
987 | if (pflag && chmod(local_path, mode) == -1) | |
988 | #endif /* HAVE_FCHMOD */ | |
989 | error("Couldn't set mode on \"%s\": %s", local_path, | |
990 | strerror(errno)); | |
991 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
992 | struct timeval tv[2]; | |
993 | tv[0].tv_sec = a->atime; | |
994 | tv[1].tv_sec = a->mtime; | |
995 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
996 | if (utimes(local_path, tv) == -1) | |
997 | error("Can't set times on \"%s\": %s", | |
998 | local_path, strerror(errno)); | |
999 | } | |
1000 | } | |
1001 | close(local_fd); | |
1002 | buffer_free(&msg); | |
1003 | xfree(handle); | |
1004 | ||
1005 | return(status); | |
1006 | } | |
1007 | ||
1008 | int | |
1009 | do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, | |
1010 | int pflag) | |
1011 | { | |
1012 | int local_fd; | |
1013 | int status = SSH2_FX_OK; | |
1014 | u_int handle_len, id, type; | |
1015 | off_t offset; | |
1016 | char *handle, *data; | |
1017 | Buffer msg; | |
1018 | struct stat sb; | |
1019 | Attrib a; | |
1020 | u_int32_t startid; | |
1021 | u_int32_t ackid; | |
1022 | struct outstanding_ack { | |
1023 | u_int id; | |
1024 | u_int len; | |
1025 | off_t offset; | |
1026 | TAILQ_ENTRY(outstanding_ack) tq; | |
1027 | }; | |
1028 | TAILQ_HEAD(ackhead, outstanding_ack) acks; | |
1029 | struct outstanding_ack *ack = NULL; | |
1030 | ||
1031 | TAILQ_INIT(&acks); | |
1032 | ||
1033 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
1034 | error("Couldn't open local file \"%s\" for reading: %s", | |
1035 | local_path, strerror(errno)); | |
1036 | return(-1); | |
1037 | } | |
1038 | if (fstat(local_fd, &sb) == -1) { | |
1039 | error("Couldn't fstat local file \"%s\": %s", | |
1040 | local_path, strerror(errno)); | |
1041 | close(local_fd); | |
1042 | return(-1); | |
1043 | } | |
1044 | if (!S_ISREG(sb.st_mode)) { | |
1045 | error("%s is not a regular file", local_path); | |
1046 | close(local_fd); | |
1047 | return(-1); | |
1048 | } | |
1049 | stat_to_attrib(&sb, &a); | |
1050 | ||
1051 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
1052 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
1053 | a.perm &= 0777; | |
1054 | if (!pflag) | |
1055 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
1056 | ||
1057 | buffer_init(&msg); | |
1058 | ||
1059 | /* Send open request */ | |
1060 | id = conn->msg_id++; | |
1061 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
1062 | buffer_put_int(&msg, id); | |
1063 | buffer_put_cstring(&msg, remote_path); | |
1064 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
1065 | encode_attrib(&msg, &a); | |
1066 | send_msg(conn->fd_out, &msg); | |
1067 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
1068 | ||
1069 | buffer_clear(&msg); | |
1070 | ||
1071 | handle = get_handle(conn->fd_in, id, &handle_len); | |
1072 | if (handle == NULL) { | |
1073 | close(local_fd); | |
1074 | buffer_free(&msg); | |
1075 | return -1; | |
1076 | } | |
1077 | ||
1078 | startid = ackid = id + 1; | |
1079 | data = xmalloc(conn->transfer_buflen); | |
1080 | ||
1081 | /* Read from local and write to remote */ | |
1082 | offset = 0; | |
1083 | if (showprogress) | |
1084 | start_progress_meter(local_path, sb.st_size, &offset); | |
1085 | ||
1086 | for (;;) { | |
1087 | int len; | |
1088 | ||
1089 | /* | |
1090 | * Can't use atomicio here because it returns 0 on EOF, | |
1091 | * thus losing the last block of the file. | |
1092 | * Simulate an EOF on interrupt, allowing ACKs from the | |
1093 | * server to drain. | |
1094 | */ | |
1095 | if (interrupted || status != SSH2_FX_OK) | |
1096 | len = 0; | |
1097 | else do | |
1098 | len = read(local_fd, data, conn->transfer_buflen); | |
1099 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
1100 | ||
1101 | if (len == -1) | |
1102 | fatal("Couldn't read from \"%s\": %s", local_path, | |
1103 | strerror(errno)); | |
1104 | ||
1105 | if (len != 0) { | |
1106 | ack = xmalloc(sizeof(*ack)); | |
1107 | ack->id = ++id; | |
1108 | ack->offset = offset; | |
1109 | ack->len = len; | |
1110 | TAILQ_INSERT_TAIL(&acks, ack, tq); | |
1111 | ||
1112 | buffer_clear(&msg); | |
1113 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
1114 | buffer_put_int(&msg, ack->id); | |
1115 | buffer_put_string(&msg, handle, handle_len); | |
1116 | buffer_put_int64(&msg, offset); | |
1117 | buffer_put_string(&msg, data, len); | |
1118 | send_msg(conn->fd_out, &msg); | |
1119 | debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", | |
1120 | id, (unsigned long long)offset, len); | |
1121 | } else if (TAILQ_FIRST(&acks) == NULL) | |
1122 | break; | |
1123 | ||
1124 | if (ack == NULL) | |
1125 | fatal("Unexpected ACK %u", id); | |
1126 | ||
1127 | if (id == startid || len == 0 || | |
1128 | id - ackid >= conn->num_requests) { | |
1129 | u_int r_id; | |
1130 | ||
1131 | buffer_clear(&msg); | |
1132 | get_msg(conn->fd_in, &msg); | |
1133 | type = buffer_get_char(&msg); | |
1134 | r_id = buffer_get_int(&msg); | |
1135 | ||
1136 | if (type != SSH2_FXP_STATUS) | |
1137 | fatal("Expected SSH2_FXP_STATUS(%d) packet, " | |
1138 | "got %d", SSH2_FXP_STATUS, type); | |
1139 | ||
1140 | status = buffer_get_int(&msg); | |
1141 | debug3("SSH2_FXP_STATUS %d", status); | |
1142 | ||
1143 | /* Find the request in our queue */ | |
1144 | for (ack = TAILQ_FIRST(&acks); | |
1145 | ack != NULL && ack->id != r_id; | |
1146 | ack = TAILQ_NEXT(ack, tq)) | |
1147 | ; | |
1148 | if (ack == NULL) | |
1149 | fatal("Can't find request for ID %u", r_id); | |
1150 | TAILQ_REMOVE(&acks, ack, tq); | |
1151 | debug3("In write loop, ack for %u %u bytes at %lld", | |
1152 | ack->id, ack->len, (long long)ack->offset); | |
1153 | ++ackid; | |
1154 | xfree(ack); | |
1155 | } | |
1156 | offset += len; | |
1157 | if (offset < 0) | |
1158 | fatal("%s: offset < 0", __func__); | |
1159 | } | |
1160 | buffer_free(&msg); | |
1161 | ||
1162 | if (showprogress) | |
1163 | stop_progress_meter(); | |
1164 | xfree(data); | |
1165 | ||
1166 | if (status != SSH2_FX_OK) { | |
1167 | error("Couldn't write to remote file \"%s\": %s", | |
1168 | remote_path, fx2txt(status)); | |
1169 | status = -1; | |
1170 | } | |
1171 | ||
1172 | if (close(local_fd) == -1) { | |
1173 | error("Couldn't close local file \"%s\": %s", local_path, | |
1174 | strerror(errno)); | |
1175 | status = -1; | |
1176 | } | |
1177 | ||
1178 | /* Override umask and utimes if asked */ | |
1179 | if (pflag) | |
1180 | do_fsetstat(conn, handle, handle_len, &a); | |
1181 | ||
1182 | if (do_close(conn, handle, handle_len) != SSH2_FX_OK) | |
1183 | status = -1; | |
1184 | xfree(handle); | |
1185 | ||
1186 | return status; | |
1187 | } |