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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 1.48 2004/03/30 12:41:56 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 int showprogress; | |
40 | ||
41 | /* Minimum amount of data to read at at time */ | |
42 | #define MIN_READ_SIZE 512 | |
43 | ||
44 | /* Maximum packet size */ | |
45 | #define MAX_MSG_LENGTH (256 * 1024) | |
46 | ||
47 | struct sftp_conn { | |
48 | int fd_in; | |
49 | int fd_out; | |
50 | u_int transfer_buflen; | |
51 | u_int num_requests; | |
52 | u_int version; | |
53 | u_int msg_id; | |
54 | }; | |
55 | ||
56 | static void | |
57 | send_msg(int fd, Buffer *m) | |
58 | { | |
59 | u_char mlen[4]; | |
60 | ||
61 | if (buffer_len(m) > MAX_MSG_LENGTH) | |
62 | fatal("Outbound message too long %u", buffer_len(m)); | |
63 | ||
64 | /* Send length first */ | |
65 | PUT_32BIT(mlen, buffer_len(m)); | |
66 | if (atomicio(vwrite, fd, mlen, sizeof(mlen)) <= 0) | |
67 | fatal("Couldn't send packet: %s", strerror(errno)); | |
68 | ||
69 | if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) <= 0) | |
70 | fatal("Couldn't send packet: %s", strerror(errno)); | |
71 | ||
72 | buffer_clear(m); | |
73 | } | |
74 | ||
75 | static void | |
76 | get_msg(int fd, Buffer *m) | |
77 | { | |
78 | ssize_t len; | |
79 | u_int msg_len; | |
80 | ||
81 | buffer_append_space(m, 4); | |
82 | len = atomicio(read, fd, buffer_ptr(m), 4); | |
83 | if (len == 0) | |
84 | fatal("Connection closed"); | |
85 | else if (len == -1) | |
86 | fatal("Couldn't read packet: %s", strerror(errno)); | |
87 | ||
88 | msg_len = buffer_get_int(m); | |
89 | if (msg_len > MAX_MSG_LENGTH) | |
90 | fatal("Received message too long %u", msg_len); | |
91 | ||
92 | buffer_append_space(m, msg_len); | |
93 | len = atomicio(read, fd, buffer_ptr(m), msg_len); | |
94 | if (len == 0) | |
95 | fatal("Connection closed"); | |
96 | else if (len == -1) | |
97 | fatal("Read packet: %s", strerror(errno)); | |
98 | } | |
99 | ||
100 | static void | |
101 | send_string_request(int fd, u_int id, u_int code, char *s, | |
102 | u_int len) | |
103 | { | |
104 | Buffer msg; | |
105 | ||
106 | buffer_init(&msg); | |
107 | buffer_put_char(&msg, code); | |
108 | buffer_put_int(&msg, id); | |
109 | buffer_put_string(&msg, s, len); | |
110 | send_msg(fd, &msg); | |
111 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
112 | buffer_free(&msg); | |
113 | } | |
114 | ||
115 | static void | |
116 | send_string_attrs_request(int fd, u_int id, u_int code, char *s, | |
117 | u_int len, Attrib *a) | |
118 | { | |
119 | Buffer msg; | |
120 | ||
121 | buffer_init(&msg); | |
122 | buffer_put_char(&msg, code); | |
123 | buffer_put_int(&msg, id); | |
124 | buffer_put_string(&msg, s, len); | |
125 | encode_attrib(&msg, a); | |
126 | send_msg(fd, &msg); | |
127 | debug3("Sent message fd %d T:%u I:%u", fd, code, id); | |
128 | buffer_free(&msg); | |
129 | } | |
130 | ||
131 | static u_int | |
132 | get_status(int fd, u_int expected_id) | |
133 | { | |
134 | Buffer msg; | |
135 | u_int type, id, status; | |
136 | ||
137 | buffer_init(&msg); | |
138 | get_msg(fd, &msg); | |
139 | type = buffer_get_char(&msg); | |
140 | id = buffer_get_int(&msg); | |
141 | ||
142 | if (id != expected_id) | |
143 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
144 | if (type != SSH2_FXP_STATUS) | |
145 | fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u", | |
146 | SSH2_FXP_STATUS, type); | |
147 | ||
148 | status = buffer_get_int(&msg); | |
149 | buffer_free(&msg); | |
150 | ||
151 | debug3("SSH2_FXP_STATUS %u", status); | |
152 | ||
153 | return(status); | |
154 | } | |
155 | ||
156 | static char * | |
157 | get_handle(int fd, u_int expected_id, u_int *len) | |
158 | { | |
159 | Buffer msg; | |
160 | u_int type, id; | |
161 | char *handle; | |
162 | ||
163 | buffer_init(&msg); | |
164 | get_msg(fd, &msg); | |
165 | type = buffer_get_char(&msg); | |
166 | id = buffer_get_int(&msg); | |
167 | ||
168 | if (id != expected_id) | |
169 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
170 | if (type == SSH2_FXP_STATUS) { | |
171 | int status = buffer_get_int(&msg); | |
172 | ||
173 | error("Couldn't get handle: %s", fx2txt(status)); | |
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 | return(NULL); | |
209 | } else if (type != SSH2_FXP_ATTRS) { | |
210 | fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u", | |
211 | SSH2_FXP_ATTRS, type); | |
212 | } | |
213 | a = decode_attrib(&msg); | |
214 | buffer_free(&msg); | |
215 | ||
216 | return(a); | |
217 | } | |
218 | ||
219 | struct sftp_conn * | |
220 | do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests) | |
221 | { | |
222 | u_int type; | |
223 | int version; | |
224 | Buffer msg; | |
225 | struct sftp_conn *ret; | |
226 | ||
227 | buffer_init(&msg); | |
228 | buffer_put_char(&msg, SSH2_FXP_INIT); | |
229 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
230 | send_msg(fd_out, &msg); | |
231 | ||
232 | buffer_clear(&msg); | |
233 | ||
234 | get_msg(fd_in, &msg); | |
235 | ||
236 | /* Expecting a VERSION reply */ | |
237 | if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) { | |
238 | error("Invalid packet back from SSH2_FXP_INIT (type %u)", | |
239 | type); | |
240 | buffer_free(&msg); | |
241 | return(NULL); | |
242 | } | |
243 | version = buffer_get_int(&msg); | |
244 | ||
245 | debug2("Remote version: %d", version); | |
246 | ||
247 | /* Check for extensions */ | |
248 | while (buffer_len(&msg) > 0) { | |
249 | char *name = buffer_get_string(&msg, NULL); | |
250 | char *value = buffer_get_string(&msg, NULL); | |
251 | ||
252 | debug2("Init extension: \"%s\"", name); | |
253 | xfree(name); | |
254 | xfree(value); | |
255 | } | |
256 | ||
257 | buffer_free(&msg); | |
258 | ||
259 | ret = xmalloc(sizeof(*ret)); | |
260 | ret->fd_in = fd_in; | |
261 | ret->fd_out = fd_out; | |
262 | ret->transfer_buflen = transfer_buflen; | |
263 | ret->num_requests = num_requests; | |
264 | ret->version = version; | |
265 | ret->msg_id = 1; | |
266 | ||
267 | /* Some filexfer v.0 servers don't support large packets */ | |
268 | if (version == 0) | |
269 | ret->transfer_buflen = MIN(ret->transfer_buflen, 20480); | |
270 | ||
271 | return(ret); | |
272 | } | |
273 | ||
274 | u_int | |
275 | sftp_proto_version(struct sftp_conn *conn) | |
276 | { | |
277 | return(conn->version); | |
278 | } | |
279 | ||
280 | int | |
281 | do_close(struct sftp_conn *conn, char *handle, u_int handle_len) | |
282 | { | |
283 | u_int id, status; | |
284 | Buffer msg; | |
285 | ||
286 | buffer_init(&msg); | |
287 | ||
288 | id = conn->msg_id++; | |
289 | buffer_put_char(&msg, SSH2_FXP_CLOSE); | |
290 | buffer_put_int(&msg, id); | |
291 | buffer_put_string(&msg, handle, handle_len); | |
292 | send_msg(conn->fd_out, &msg); | |
293 | debug3("Sent message SSH2_FXP_CLOSE I:%u", id); | |
294 | ||
295 | status = get_status(conn->fd_in, id); | |
296 | if (status != SSH2_FX_OK) | |
297 | error("Couldn't close file: %s", fx2txt(status)); | |
298 | ||
299 | buffer_free(&msg); | |
300 | ||
301 | return(status); | |
302 | } | |
303 | ||
304 | ||
305 | static int | |
306 | do_lsreaddir(struct sftp_conn *conn, char *path, int printflag, | |
307 | SFTP_DIRENT ***dir) | |
308 | { | |
309 | Buffer msg; | |
310 | u_int type, id, handle_len, i, expected_id, ents = 0; | |
311 | char *handle; | |
312 | ||
313 | id = conn->msg_id++; | |
314 | ||
315 | buffer_init(&msg); | |
316 | buffer_put_char(&msg, SSH2_FXP_OPENDIR); | |
317 | buffer_put_int(&msg, id); | |
318 | buffer_put_cstring(&msg, path); | |
319 | send_msg(conn->fd_out, &msg); | |
320 | ||
321 | buffer_clear(&msg); | |
322 | ||
323 | handle = get_handle(conn->fd_in, id, &handle_len); | |
324 | if (handle == NULL) | |
325 | return(-1); | |
326 | ||
327 | if (dir) { | |
328 | ents = 0; | |
329 | *dir = xmalloc(sizeof(**dir)); | |
330 | (*dir)[0] = NULL; | |
331 | } | |
332 | ||
333 | for (;;) { | |
334 | int count; | |
335 | ||
336 | id = expected_id = conn->msg_id++; | |
337 | ||
338 | debug3("Sending SSH2_FXP_READDIR I:%u", id); | |
339 | ||
340 | buffer_clear(&msg); | |
341 | buffer_put_char(&msg, SSH2_FXP_READDIR); | |
342 | buffer_put_int(&msg, id); | |
343 | buffer_put_string(&msg, handle, handle_len); | |
344 | send_msg(conn->fd_out, &msg); | |
345 | ||
346 | buffer_clear(&msg); | |
347 | ||
348 | get_msg(conn->fd_in, &msg); | |
349 | ||
350 | type = buffer_get_char(&msg); | |
351 | id = buffer_get_int(&msg); | |
352 | ||
353 | debug3("Received reply T:%u I:%u", type, id); | |
354 | ||
355 | if (id != expected_id) | |
356 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
357 | ||
358 | if (type == SSH2_FXP_STATUS) { | |
359 | int status = buffer_get_int(&msg); | |
360 | ||
361 | debug3("Received SSH2_FXP_STATUS %d", status); | |
362 | ||
363 | if (status == SSH2_FX_EOF) { | |
364 | break; | |
365 | } else { | |
366 | error("Couldn't read directory: %s", | |
367 | fx2txt(status)); | |
368 | do_close(conn, handle, handle_len); | |
369 | xfree(handle); | |
370 | return(status); | |
371 | } | |
372 | } else if (type != SSH2_FXP_NAME) | |
373 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
374 | SSH2_FXP_NAME, type); | |
375 | ||
376 | count = buffer_get_int(&msg); | |
377 | if (count == 0) | |
378 | break; | |
379 | debug3("Received %d SSH2_FXP_NAME responses", count); | |
380 | for (i = 0; i < count; i++) { | |
381 | char *filename, *longname; | |
382 | Attrib *a; | |
383 | ||
384 | filename = buffer_get_string(&msg, NULL); | |
385 | longname = buffer_get_string(&msg, NULL); | |
386 | a = decode_attrib(&msg); | |
387 | ||
388 | if (printflag) | |
389 | printf("%s\n", longname); | |
390 | ||
391 | if (dir) { | |
392 | *dir = xrealloc(*dir, sizeof(**dir) * | |
393 | (ents + 2)); | |
394 | (*dir)[ents] = xmalloc(sizeof(***dir)); | |
395 | (*dir)[ents]->filename = xstrdup(filename); | |
396 | (*dir)[ents]->longname = xstrdup(longname); | |
397 | memcpy(&(*dir)[ents]->a, a, sizeof(*a)); | |
398 | (*dir)[++ents] = NULL; | |
399 | } | |
400 | ||
401 | xfree(filename); | |
402 | xfree(longname); | |
403 | } | |
404 | } | |
405 | ||
406 | buffer_free(&msg); | |
407 | do_close(conn, handle, handle_len); | |
408 | xfree(handle); | |
409 | ||
410 | return(0); | |
411 | } | |
412 | ||
413 | int | |
414 | do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir) | |
415 | { | |
416 | return(do_lsreaddir(conn, path, 0, dir)); | |
417 | } | |
418 | ||
419 | void free_sftp_dirents(SFTP_DIRENT **s) | |
420 | { | |
421 | int i; | |
422 | ||
423 | for (i = 0; s[i]; i++) { | |
424 | xfree(s[i]->filename); | |
425 | xfree(s[i]->longname); | |
426 | xfree(s[i]); | |
427 | } | |
428 | xfree(s); | |
429 | } | |
430 | ||
431 | int | |
432 | do_rm(struct sftp_conn *conn, char *path) | |
433 | { | |
434 | u_int status, id; | |
435 | ||
436 | debug2("Sending SSH2_FXP_REMOVE \"%s\"", path); | |
437 | ||
438 | id = conn->msg_id++; | |
439 | send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path, | |
440 | strlen(path)); | |
441 | status = get_status(conn->fd_in, id); | |
442 | if (status != SSH2_FX_OK) | |
443 | error("Couldn't delete file: %s", fx2txt(status)); | |
444 | return(status); | |
445 | } | |
446 | ||
447 | int | |
448 | do_mkdir(struct sftp_conn *conn, char *path, Attrib *a) | |
449 | { | |
450 | u_int status, id; | |
451 | ||
452 | id = conn->msg_id++; | |
453 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path, | |
454 | strlen(path), a); | |
455 | ||
456 | status = get_status(conn->fd_in, id); | |
457 | if (status != SSH2_FX_OK) | |
458 | error("Couldn't create directory: %s", fx2txt(status)); | |
459 | ||
460 | return(status); | |
461 | } | |
462 | ||
463 | int | |
464 | do_rmdir(struct sftp_conn *conn, char *path) | |
465 | { | |
466 | u_int status, id; | |
467 | ||
468 | id = conn->msg_id++; | |
469 | send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path, | |
470 | strlen(path)); | |
471 | ||
472 | status = get_status(conn->fd_in, id); | |
473 | if (status != SSH2_FX_OK) | |
474 | error("Couldn't remove directory: %s", fx2txt(status)); | |
475 | ||
476 | return(status); | |
477 | } | |
478 | ||
479 | Attrib * | |
480 | do_stat(struct sftp_conn *conn, char *path, int quiet) | |
481 | { | |
482 | u_int id; | |
483 | ||
484 | id = conn->msg_id++; | |
485 | ||
486 | send_string_request(conn->fd_out, id, | |
487 | conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT, | |
488 | path, strlen(path)); | |
489 | ||
490 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
491 | } | |
492 | ||
493 | Attrib * | |
494 | do_lstat(struct sftp_conn *conn, char *path, int quiet) | |
495 | { | |
496 | u_int id; | |
497 | ||
498 | if (conn->version == 0) { | |
499 | if (quiet) | |
500 | debug("Server version does not support lstat operation"); | |
501 | else | |
502 | logit("Server version does not support lstat operation"); | |
503 | return(do_stat(conn, path, quiet)); | |
504 | } | |
505 | ||
506 | id = conn->msg_id++; | |
507 | send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path, | |
508 | strlen(path)); | |
509 | ||
510 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
511 | } | |
512 | ||
513 | Attrib * | |
514 | do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet) | |
515 | { | |
516 | u_int id; | |
517 | ||
518 | id = conn->msg_id++; | |
519 | send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle, | |
520 | handle_len); | |
521 | ||
522 | return(get_decode_stat(conn->fd_in, id, quiet)); | |
523 | } | |
524 | ||
525 | int | |
526 | do_setstat(struct sftp_conn *conn, char *path, Attrib *a) | |
527 | { | |
528 | u_int status, id; | |
529 | ||
530 | id = conn->msg_id++; | |
531 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path, | |
532 | strlen(path), a); | |
533 | ||
534 | status = get_status(conn->fd_in, id); | |
535 | if (status != SSH2_FX_OK) | |
536 | error("Couldn't setstat on \"%s\": %s", path, | |
537 | fx2txt(status)); | |
538 | ||
539 | return(status); | |
540 | } | |
541 | ||
542 | int | |
543 | do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len, | |
544 | Attrib *a) | |
545 | { | |
546 | u_int status, id; | |
547 | ||
548 | id = conn->msg_id++; | |
549 | send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle, | |
550 | handle_len, a); | |
551 | ||
552 | status = get_status(conn->fd_in, id); | |
553 | if (status != SSH2_FX_OK) | |
554 | error("Couldn't fsetstat: %s", fx2txt(status)); | |
555 | ||
556 | return(status); | |
557 | } | |
558 | ||
559 | char * | |
560 | do_realpath(struct sftp_conn *conn, char *path) | |
561 | { | |
562 | Buffer msg; | |
563 | u_int type, expected_id, count, id; | |
564 | char *filename, *longname; | |
565 | Attrib *a; | |
566 | ||
567 | expected_id = id = conn->msg_id++; | |
568 | send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path, | |
569 | strlen(path)); | |
570 | ||
571 | buffer_init(&msg); | |
572 | ||
573 | get_msg(conn->fd_in, &msg); | |
574 | type = buffer_get_char(&msg); | |
575 | id = buffer_get_int(&msg); | |
576 | ||
577 | if (id != expected_id) | |
578 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
579 | ||
580 | if (type == SSH2_FXP_STATUS) { | |
581 | u_int status = buffer_get_int(&msg); | |
582 | ||
583 | error("Couldn't canonicalise: %s", fx2txt(status)); | |
584 | return(NULL); | |
585 | } else if (type != SSH2_FXP_NAME) | |
586 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
587 | SSH2_FXP_NAME, type); | |
588 | ||
589 | count = buffer_get_int(&msg); | |
590 | if (count != 1) | |
591 | fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count); | |
592 | ||
593 | filename = buffer_get_string(&msg, NULL); | |
594 | longname = buffer_get_string(&msg, NULL); | |
595 | a = decode_attrib(&msg); | |
596 | ||
597 | debug3("SSH_FXP_REALPATH %s -> %s", path, filename); | |
598 | ||
599 | xfree(longname); | |
600 | ||
601 | buffer_free(&msg); | |
602 | ||
603 | return(filename); | |
604 | } | |
605 | ||
606 | int | |
607 | do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) | |
608 | { | |
609 | Buffer msg; | |
610 | u_int status, id; | |
611 | ||
612 | buffer_init(&msg); | |
613 | ||
614 | /* Send rename request */ | |
615 | id = conn->msg_id++; | |
616 | buffer_put_char(&msg, SSH2_FXP_RENAME); | |
617 | buffer_put_int(&msg, id); | |
618 | buffer_put_cstring(&msg, oldpath); | |
619 | buffer_put_cstring(&msg, newpath); | |
620 | send_msg(conn->fd_out, &msg); | |
621 | debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath, | |
622 | newpath); | |
623 | buffer_free(&msg); | |
624 | ||
625 | status = get_status(conn->fd_in, id); | |
626 | if (status != SSH2_FX_OK) | |
627 | error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath, | |
628 | newpath, fx2txt(status)); | |
629 | ||
630 | return(status); | |
631 | } | |
632 | ||
633 | int | |
634 | do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) | |
635 | { | |
636 | Buffer msg; | |
637 | u_int status, id; | |
638 | ||
639 | if (conn->version < 3) { | |
640 | error("This server does not support the symlink operation"); | |
641 | return(SSH2_FX_OP_UNSUPPORTED); | |
642 | } | |
643 | ||
644 | buffer_init(&msg); | |
645 | ||
646 | /* Send symlink request */ | |
647 | id = conn->msg_id++; | |
648 | buffer_put_char(&msg, SSH2_FXP_SYMLINK); | |
649 | buffer_put_int(&msg, id); | |
650 | buffer_put_cstring(&msg, oldpath); | |
651 | buffer_put_cstring(&msg, newpath); | |
652 | send_msg(conn->fd_out, &msg); | |
653 | debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath, | |
654 | newpath); | |
655 | buffer_free(&msg); | |
656 | ||
657 | status = get_status(conn->fd_in, id); | |
658 | if (status != SSH2_FX_OK) | |
659 | error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath, | |
660 | newpath, fx2txt(status)); | |
661 | ||
662 | return(status); | |
663 | } | |
664 | ||
665 | char * | |
666 | do_readlink(struct sftp_conn *conn, char *path) | |
667 | { | |
668 | Buffer msg; | |
669 | u_int type, expected_id, count, id; | |
670 | char *filename, *longname; | |
671 | Attrib *a; | |
672 | ||
673 | expected_id = id = conn->msg_id++; | |
674 | send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path, | |
675 | strlen(path)); | |
676 | ||
677 | buffer_init(&msg); | |
678 | ||
679 | get_msg(conn->fd_in, &msg); | |
680 | type = buffer_get_char(&msg); | |
681 | id = buffer_get_int(&msg); | |
682 | ||
683 | if (id != expected_id) | |
684 | fatal("ID mismatch (%u != %u)", id, expected_id); | |
685 | ||
686 | if (type == SSH2_FXP_STATUS) { | |
687 | u_int status = buffer_get_int(&msg); | |
688 | ||
689 | error("Couldn't readlink: %s", fx2txt(status)); | |
690 | return(NULL); | |
691 | } else if (type != SSH2_FXP_NAME) | |
692 | fatal("Expected SSH2_FXP_NAME(%u) packet, got %u", | |
693 | SSH2_FXP_NAME, type); | |
694 | ||
695 | count = buffer_get_int(&msg); | |
696 | if (count != 1) | |
697 | fatal("Got multiple names (%d) from SSH_FXP_READLINK", count); | |
698 | ||
699 | filename = buffer_get_string(&msg, NULL); | |
700 | longname = buffer_get_string(&msg, NULL); | |
701 | a = decode_attrib(&msg); | |
702 | ||
703 | debug3("SSH_FXP_READLINK %s -> %s", path, filename); | |
704 | ||
705 | xfree(longname); | |
706 | ||
707 | buffer_free(&msg); | |
708 | ||
709 | return(filename); | |
710 | } | |
711 | ||
712 | static void | |
713 | send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len, | |
714 | char *handle, u_int handle_len) | |
715 | { | |
716 | Buffer msg; | |
717 | ||
718 | buffer_init(&msg); | |
719 | buffer_clear(&msg); | |
720 | buffer_put_char(&msg, SSH2_FXP_READ); | |
721 | buffer_put_int(&msg, id); | |
722 | buffer_put_string(&msg, handle, handle_len); | |
723 | buffer_put_int64(&msg, offset); | |
724 | buffer_put_int(&msg, len); | |
725 | send_msg(fd_out, &msg); | |
726 | buffer_free(&msg); | |
727 | } | |
728 | ||
729 | int | |
730 | do_download(struct sftp_conn *conn, char *remote_path, char *local_path, | |
731 | int pflag) | |
732 | { | |
733 | Attrib junk, *a; | |
734 | Buffer msg; | |
735 | char *handle; | |
736 | int local_fd, status, num_req, max_req, write_error; | |
737 | int read_error, write_errno; | |
738 | u_int64_t offset, size; | |
739 | u_int handle_len, mode, type, id, buflen; | |
740 | off_t progress_counter; | |
741 | struct request { | |
742 | u_int id; | |
743 | u_int len; | |
744 | u_int64_t offset; | |
745 | TAILQ_ENTRY(request) tq; | |
746 | }; | |
747 | TAILQ_HEAD(reqhead, request) requests; | |
748 | struct request *req; | |
749 | ||
750 | TAILQ_INIT(&requests); | |
751 | ||
752 | a = do_stat(conn, remote_path, 0); | |
753 | if (a == NULL) | |
754 | return(-1); | |
755 | ||
756 | /* XXX: should we preserve set[ug]id? */ | |
757 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) | |
758 | mode = a->perm & 0777; | |
759 | else | |
760 | mode = 0666; | |
761 | ||
762 | if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) && | |
763 | (!S_ISREG(a->perm))) { | |
764 | error("Cannot download non-regular file: %s", remote_path); | |
765 | return(-1); | |
766 | } | |
767 | ||
768 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) | |
769 | size = a->size; | |
770 | else | |
771 | size = 0; | |
772 | ||
773 | buflen = conn->transfer_buflen; | |
774 | buffer_init(&msg); | |
775 | ||
776 | /* Send open request */ | |
777 | id = conn->msg_id++; | |
778 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
779 | buffer_put_int(&msg, id); | |
780 | buffer_put_cstring(&msg, remote_path); | |
781 | buffer_put_int(&msg, SSH2_FXF_READ); | |
782 | attrib_clear(&junk); /* Send empty attributes */ | |
783 | encode_attrib(&msg, &junk); | |
784 | send_msg(conn->fd_out, &msg); | |
785 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
786 | ||
787 | handle = get_handle(conn->fd_in, id, &handle_len); | |
788 | if (handle == NULL) { | |
789 | buffer_free(&msg); | |
790 | return(-1); | |
791 | } | |
792 | ||
793 | local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, | |
794 | mode | S_IWRITE); | |
795 | if (local_fd == -1) { | |
796 | error("Couldn't open local file \"%s\" for writing: %s", | |
797 | local_path, strerror(errno)); | |
798 | buffer_free(&msg); | |
799 | xfree(handle); | |
800 | return(-1); | |
801 | } | |
802 | ||
803 | /* Read from remote and write to local */ | |
804 | write_error = read_error = write_errno = num_req = offset = 0; | |
805 | max_req = 1; | |
806 | progress_counter = 0; | |
807 | ||
808 | if (showprogress && size != 0) | |
809 | start_progress_meter(remote_path, size, &progress_counter); | |
810 | ||
811 | while (num_req > 0 || max_req > 0) { | |
812 | char *data; | |
813 | u_int len; | |
814 | ||
815 | /* Send some more requests */ | |
816 | while (num_req < max_req) { | |
817 | debug3("Request range %llu -> %llu (%d/%d)", | |
818 | (unsigned long long)offset, | |
819 | (unsigned long long)offset + buflen - 1, | |
820 | num_req, max_req); | |
821 | req = xmalloc(sizeof(*req)); | |
822 | req->id = conn->msg_id++; | |
823 | req->len = buflen; | |
824 | req->offset = offset; | |
825 | offset += buflen; | |
826 | num_req++; | |
827 | TAILQ_INSERT_TAIL(&requests, req, tq); | |
828 | send_read_request(conn->fd_out, req->id, req->offset, | |
829 | req->len, handle, handle_len); | |
830 | } | |
831 | ||
832 | buffer_clear(&msg); | |
833 | get_msg(conn->fd_in, &msg); | |
834 | type = buffer_get_char(&msg); | |
835 | id = buffer_get_int(&msg); | |
836 | debug3("Received reply T:%u I:%u R:%d", type, id, max_req); | |
837 | ||
838 | /* Find the request in our queue */ | |
839 | for(req = TAILQ_FIRST(&requests); | |
840 | req != NULL && req->id != id; | |
841 | req = TAILQ_NEXT(req, tq)) | |
842 | ; | |
843 | if (req == NULL) | |
844 | fatal("Unexpected reply %u", id); | |
845 | ||
846 | switch (type) { | |
847 | case SSH2_FXP_STATUS: | |
848 | status = buffer_get_int(&msg); | |
849 | if (status != SSH2_FX_EOF) | |
850 | read_error = 1; | |
851 | max_req = 0; | |
852 | TAILQ_REMOVE(&requests, req, tq); | |
853 | xfree(req); | |
854 | num_req--; | |
855 | break; | |
856 | case SSH2_FXP_DATA: | |
857 | data = buffer_get_string(&msg, &len); | |
858 | debug3("Received data %llu -> %llu", | |
859 | (unsigned long long)req->offset, | |
860 | (unsigned long long)req->offset + len - 1); | |
861 | if (len > req->len) | |
862 | fatal("Received more data than asked for " | |
863 | "%u > %u", len, req->len); | |
864 | if ((lseek(local_fd, req->offset, SEEK_SET) == -1 || | |
865 | atomicio(vwrite, local_fd, data, len) != len) && | |
866 | !write_error) { | |
867 | write_errno = errno; | |
868 | write_error = 1; | |
869 | max_req = 0; | |
870 | } | |
871 | progress_counter += len; | |
872 | xfree(data); | |
873 | ||
874 | if (len == req->len) { | |
875 | TAILQ_REMOVE(&requests, req, tq); | |
876 | xfree(req); | |
877 | num_req--; | |
878 | } else { | |
879 | /* Resend the request for the missing data */ | |
880 | debug3("Short data block, re-requesting " | |
881 | "%llu -> %llu (%2d)", | |
882 | (unsigned long long)req->offset + len, | |
883 | (unsigned long long)req->offset + | |
884 | req->len - 1, num_req); | |
885 | req->id = conn->msg_id++; | |
886 | req->len -= len; | |
887 | req->offset += len; | |
888 | send_read_request(conn->fd_out, req->id, | |
889 | req->offset, req->len, handle, handle_len); | |
890 | /* Reduce the request size */ | |
891 | if (len < buflen) | |
892 | buflen = MAX(MIN_READ_SIZE, len); | |
893 | } | |
894 | if (max_req > 0) { /* max_req = 0 iff EOF received */ | |
895 | if (size > 0 && offset > size) { | |
896 | /* Only one request at a time | |
897 | * after the expected EOF */ | |
898 | debug3("Finish at %llu (%2d)", | |
899 | (unsigned long long)offset, | |
900 | num_req); | |
901 | max_req = 1; | |
902 | } | |
903 | else if (max_req < conn->num_requests + 1) { | |
904 | ++max_req; | |
905 | } | |
906 | } | |
907 | break; | |
908 | default: | |
909 | fatal("Expected SSH2_FXP_DATA(%u) packet, got %u", | |
910 | SSH2_FXP_DATA, type); | |
911 | } | |
912 | } | |
913 | ||
914 | if (showprogress && size) | |
915 | stop_progress_meter(); | |
916 | ||
917 | /* Sanity check */ | |
918 | if (TAILQ_FIRST(&requests) != NULL) | |
919 | fatal("Transfer complete, but requests still in queue"); | |
920 | ||
921 | if (read_error) { | |
922 | error("Couldn't read from remote file \"%s\" : %s", | |
923 | remote_path, fx2txt(status)); | |
924 | do_close(conn, handle, handle_len); | |
925 | } else if (write_error) { | |
926 | error("Couldn't write to \"%s\": %s", local_path, | |
927 | strerror(write_errno)); | |
928 | status = -1; | |
929 | do_close(conn, handle, handle_len); | |
930 | } else { | |
931 | status = do_close(conn, handle, handle_len); | |
932 | ||
933 | /* Override umask and utimes if asked */ | |
934 | #ifdef HAVE_FCHMOD | |
935 | if (pflag && fchmod(local_fd, mode) == -1) | |
936 | #else | |
937 | if (pflag && chmod(local_path, mode) == -1) | |
938 | #endif /* HAVE_FCHMOD */ | |
939 | error("Couldn't set mode on \"%s\": %s", local_path, | |
940 | strerror(errno)); | |
941 | if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) { | |
942 | struct timeval tv[2]; | |
943 | tv[0].tv_sec = a->atime; | |
944 | tv[1].tv_sec = a->mtime; | |
945 | tv[0].tv_usec = tv[1].tv_usec = 0; | |
946 | if (utimes(local_path, tv) == -1) | |
947 | error("Can't set times on \"%s\": %s", | |
948 | local_path, strerror(errno)); | |
949 | } | |
950 | } | |
951 | close(local_fd); | |
952 | buffer_free(&msg); | |
953 | xfree(handle); | |
954 | ||
955 | return(status); | |
956 | } | |
957 | ||
958 | int | |
959 | do_upload(struct sftp_conn *conn, char *local_path, char *remote_path, | |
960 | int pflag) | |
961 | { | |
962 | int local_fd, status; | |
963 | u_int handle_len, id, type; | |
964 | u_int64_t offset; | |
965 | char *handle, *data; | |
966 | Buffer msg; | |
967 | struct stat sb; | |
968 | Attrib a; | |
969 | u_int32_t startid; | |
970 | u_int32_t ackid; | |
971 | struct outstanding_ack { | |
972 | u_int id; | |
973 | u_int len; | |
974 | u_int64_t offset; | |
975 | TAILQ_ENTRY(outstanding_ack) tq; | |
976 | }; | |
977 | TAILQ_HEAD(ackhead, outstanding_ack) acks; | |
978 | struct outstanding_ack *ack; | |
979 | ||
980 | TAILQ_INIT(&acks); | |
981 | ||
982 | if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) { | |
983 | error("Couldn't open local file \"%s\" for reading: %s", | |
984 | local_path, strerror(errno)); | |
985 | return(-1); | |
986 | } | |
987 | if (fstat(local_fd, &sb) == -1) { | |
988 | error("Couldn't fstat local file \"%s\": %s", | |
989 | local_path, strerror(errno)); | |
990 | close(local_fd); | |
991 | return(-1); | |
992 | } | |
993 | if (!S_ISREG(sb.st_mode)) { | |
994 | error("%s is not a regular file", local_path); | |
995 | close(local_fd); | |
996 | return(-1); | |
997 | } | |
998 | stat_to_attrib(&sb, &a); | |
999 | ||
1000 | a.flags &= ~SSH2_FILEXFER_ATTR_SIZE; | |
1001 | a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID; | |
1002 | a.perm &= 0777; | |
1003 | if (!pflag) | |
1004 | a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME; | |
1005 | ||
1006 | buffer_init(&msg); | |
1007 | ||
1008 | /* Send open request */ | |
1009 | id = conn->msg_id++; | |
1010 | buffer_put_char(&msg, SSH2_FXP_OPEN); | |
1011 | buffer_put_int(&msg, id); | |
1012 | buffer_put_cstring(&msg, remote_path); | |
1013 | buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC); | |
1014 | encode_attrib(&msg, &a); | |
1015 | send_msg(conn->fd_out, &msg); | |
1016 | debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path); | |
1017 | ||
1018 | buffer_clear(&msg); | |
1019 | ||
1020 | handle = get_handle(conn->fd_in, id, &handle_len); | |
1021 | if (handle == NULL) { | |
1022 | close(local_fd); | |
1023 | buffer_free(&msg); | |
1024 | return(-1); | |
1025 | } | |
1026 | ||
1027 | startid = ackid = id + 1; | |
1028 | data = xmalloc(conn->transfer_buflen); | |
1029 | ||
1030 | /* Read from local and write to remote */ | |
1031 | offset = 0; | |
1032 | if (showprogress) | |
1033 | start_progress_meter(local_path, sb.st_size, &offset); | |
1034 | ||
1035 | for (;;) { | |
1036 | int len; | |
1037 | ||
1038 | /* | |
1039 | * Can't use atomicio here because it returns 0 on EOF, thus losing | |
1040 | * the last block of the file | |
1041 | */ | |
1042 | do | |
1043 | len = read(local_fd, data, conn->transfer_buflen); | |
1044 | while ((len == -1) && (errno == EINTR || errno == EAGAIN)); | |
1045 | ||
1046 | if (len == -1) | |
1047 | fatal("Couldn't read from \"%s\": %s", local_path, | |
1048 | strerror(errno)); | |
1049 | ||
1050 | if (len != 0) { | |
1051 | ack = xmalloc(sizeof(*ack)); | |
1052 | ack->id = ++id; | |
1053 | ack->offset = offset; | |
1054 | ack->len = len; | |
1055 | TAILQ_INSERT_TAIL(&acks, ack, tq); | |
1056 | ||
1057 | buffer_clear(&msg); | |
1058 | buffer_put_char(&msg, SSH2_FXP_WRITE); | |
1059 | buffer_put_int(&msg, ack->id); | |
1060 | buffer_put_string(&msg, handle, handle_len); | |
1061 | buffer_put_int64(&msg, offset); | |
1062 | buffer_put_string(&msg, data, len); | |
1063 | send_msg(conn->fd_out, &msg); | |
1064 | debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u", | |
1065 | id, (unsigned long long)offset, len); | |
1066 | } else if (TAILQ_FIRST(&acks) == NULL) | |
1067 | break; | |
1068 | ||
1069 | if (ack == NULL) | |
1070 | fatal("Unexpected ACK %u", id); | |
1071 | ||
1072 | if (id == startid || len == 0 || | |
1073 | id - ackid >= conn->num_requests) { | |
1074 | u_int r_id; | |
1075 | ||
1076 | buffer_clear(&msg); | |
1077 | get_msg(conn->fd_in, &msg); | |
1078 | type = buffer_get_char(&msg); | |
1079 | r_id = buffer_get_int(&msg); | |
1080 | ||
1081 | if (type != SSH2_FXP_STATUS) | |
1082 | fatal("Expected SSH2_FXP_STATUS(%d) packet, " | |
1083 | "got %d", SSH2_FXP_STATUS, type); | |
1084 | ||
1085 | status = buffer_get_int(&msg); | |
1086 | debug3("SSH2_FXP_STATUS %d", status); | |
1087 | ||
1088 | /* Find the request in our queue */ | |
1089 | for(ack = TAILQ_FIRST(&acks); | |
1090 | ack != NULL && ack->id != r_id; | |
1091 | ack = TAILQ_NEXT(ack, tq)) | |
1092 | ; | |
1093 | if (ack == NULL) | |
1094 | fatal("Can't find request for ID %u", r_id); | |
1095 | TAILQ_REMOVE(&acks, ack, tq); | |
1096 | ||
1097 | if (status != SSH2_FX_OK) { | |
1098 | error("Couldn't write to remote file \"%s\": %s", | |
1099 | remote_path, fx2txt(status)); | |
1100 | do_close(conn, handle, handle_len); | |
1101 | close(local_fd); | |
1102 | xfree(data); | |
1103 | xfree(ack); | |
1104 | goto done; | |
1105 | } | |
1106 | debug3("In write loop, ack for %u %u bytes at %llu", | |
1107 | ack->id, ack->len, (unsigned long long)ack->offset); | |
1108 | ++ackid; | |
1109 | xfree(ack); | |
1110 | } | |
1111 | offset += len; | |
1112 | } | |
1113 | if (showprogress) | |
1114 | stop_progress_meter(); | |
1115 | xfree(data); | |
1116 | ||
1117 | if (close(local_fd) == -1) { | |
1118 | error("Couldn't close local file \"%s\": %s", local_path, | |
1119 | strerror(errno)); | |
1120 | do_close(conn, handle, handle_len); | |
1121 | status = -1; | |
1122 | goto done; | |
1123 | } | |
1124 | ||
1125 | /* Override umask and utimes if asked */ | |
1126 | if (pflag) | |
1127 | do_fsetstat(conn, handle, handle_len, &a); | |
1128 | ||
1129 | status = do_close(conn, handle, handle_len); | |
1130 | ||
1131 | done: | |
1132 | xfree(handle); | |
1133 | buffer_free(&msg); | |
1134 | return(status); | |
1135 | } |