Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.60
1.1 djm 1: /*
1.46 djm 2: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 3: *
1.46 djm 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.
1.1 djm 7: *
1.46 djm 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.
1.1 djm 15: */
16:
17: /* XXX: memleaks */
18: /* XXX: signed vs unsigned */
1.23 djm 19: /* XXX: remove all logging, only return status codes */
1.1 djm 20: /* XXX: copy between two remote sites */
21:
22: #include "includes.h"
1.60 ! stevesk 23: RCSID("$OpenBSD: sftp-client.c,v 1.59 2006/02/15 05:08:24 david Exp $");
1.21 djm 24:
25: #include <sys/queue.h>
1.60 ! stevesk 26: #include <sys/types.h>
! 27: #include <sys/stat.h>
1.1 djm 28:
29: #include "buffer.h"
30: #include "bufaux.h"
31: #include "getput.h"
32: #include "xmalloc.h"
33: #include "log.h"
34: #include "atomicio.h"
1.39 fgsch 35: #include "progressmeter.h"
1.1 djm 36:
37: #include "sftp.h"
38: #include "sftp-common.h"
39: #include "sftp-client.h"
40:
1.49 djm 41: extern volatile sig_atomic_t interrupted;
1.39 fgsch 42: extern int showprogress;
43:
1.59 david 44: /* Minimum amount of data to read at a time */
1.21 djm 45: #define MIN_READ_SIZE 512
46:
1.23 djm 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: };
1.4 djm 55:
1.17 itojun 56: static void
1.1 djm 57: send_msg(int fd, Buffer *m)
58: {
1.40 djm 59: u_char mlen[4];
60:
1.58 djm 61: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 62: fatal("Outbound message too long %u", buffer_len(m));
63:
64: /* Send length first */
65: PUT_32BIT(mlen, buffer_len(m));
1.54 avsm 66: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) != sizeof(mlen))
1.40 djm 67: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 68:
1.54 avsm 69: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) != buffer_len(m))
1.1 djm 70: fatal("Couldn't send packet: %s", strerror(errno));
71:
1.40 djm 72: buffer_clear(m);
1.1 djm 73: }
74:
1.17 itojun 75: static void
1.1 djm 76: get_msg(int fd, Buffer *m)
77: {
1.40 djm 78: u_int msg_len;
1.1 djm 79:
1.40 djm 80: buffer_append_space(m, 4);
1.54 avsm 81: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
82: if (errno == EPIPE)
83: fatal("Connection closed");
84: else
85: fatal("Couldn't read packet: %s", strerror(errno));
86: }
1.1 djm 87:
1.40 djm 88: msg_len = buffer_get_int(m);
1.58 djm 89: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 90: fatal("Received message too long %u", msg_len);
1.1 djm 91:
1.40 djm 92: buffer_append_space(m, msg_len);
1.54 avsm 93: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
94: if (errno == EPIPE)
95: fatal("Connection closed");
96: else
97: fatal("Read packet: %s", strerror(errno));
98: }
1.1 djm 99: }
100:
1.17 itojun 101: static void
1.1 djm 102: send_string_request(int fd, u_int id, u_int code, char *s,
103: u_int len)
104: {
105: Buffer msg;
106:
107: buffer_init(&msg);
108: buffer_put_char(&msg, code);
109: buffer_put_int(&msg, id);
110: buffer_put_string(&msg, s, len);
111: send_msg(fd, &msg);
1.33 deraadt 112: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 113: buffer_free(&msg);
114: }
115:
1.17 itojun 116: static void
1.1 djm 117: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
118: u_int len, Attrib *a)
119: {
120: Buffer msg;
121:
122: buffer_init(&msg);
123: buffer_put_char(&msg, code);
124: buffer_put_int(&msg, id);
125: buffer_put_string(&msg, s, len);
126: encode_attrib(&msg, a);
127: send_msg(fd, &msg);
1.33 deraadt 128: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 129: buffer_free(&msg);
130: }
131:
1.17 itojun 132: static u_int
1.33 deraadt 133: get_status(int fd, u_int expected_id)
1.1 djm 134: {
135: Buffer msg;
136: u_int type, id, status;
137:
138: buffer_init(&msg);
139: get_msg(fd, &msg);
140: type = buffer_get_char(&msg);
141: id = buffer_get_int(&msg);
142:
143: if (id != expected_id)
1.33 deraadt 144: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 145: if (type != SSH2_FXP_STATUS)
1.33 deraadt 146: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 147: SSH2_FXP_STATUS, type);
148:
149: status = buffer_get_int(&msg);
150: buffer_free(&msg);
151:
1.33 deraadt 152: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 153:
154: return(status);
155: }
156:
1.17 itojun 157: static char *
1.1 djm 158: get_handle(int fd, u_int expected_id, u_int *len)
159: {
160: Buffer msg;
161: u_int type, id;
162: char *handle;
163:
164: buffer_init(&msg);
165: get_msg(fd, &msg);
166: type = buffer_get_char(&msg);
167: id = buffer_get_int(&msg);
168:
169: if (id != expected_id)
1.33 deraadt 170: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 171: if (type == SSH2_FXP_STATUS) {
172: int status = buffer_get_int(&msg);
173:
174: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 175: buffer_free(&msg);
1.1 djm 176: return(NULL);
177: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 178: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 179: SSH2_FXP_HANDLE, type);
180:
181: handle = buffer_get_string(&msg, len);
182: buffer_free(&msg);
183:
184: return(handle);
185: }
186:
1.17 itojun 187: static Attrib *
1.14 djm 188: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 189: {
190: Buffer msg;
191: u_int type, id;
192: Attrib *a;
193:
194: buffer_init(&msg);
195: get_msg(fd, &msg);
196:
197: type = buffer_get_char(&msg);
198: id = buffer_get_int(&msg);
199:
1.33 deraadt 200: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 201: if (id != expected_id)
1.33 deraadt 202: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 203: if (type == SSH2_FXP_STATUS) {
204: int status = buffer_get_int(&msg);
205:
1.14 djm 206: if (quiet)
207: debug("Couldn't stat remote file: %s", fx2txt(status));
208: else
209: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 210: buffer_free(&msg);
1.1 djm 211: return(NULL);
212: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 213: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 214: SSH2_FXP_ATTRS, type);
215: }
216: a = decode_attrib(&msg);
217: buffer_free(&msg);
218:
219: return(a);
220: }
221:
1.23 djm 222: struct sftp_conn *
223: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 224: {
1.33 deraadt 225: u_int type;
226: int version;
1.1 djm 227: Buffer msg;
1.23 djm 228: struct sftp_conn *ret;
1.1 djm 229:
230: buffer_init(&msg);
231: buffer_put_char(&msg, SSH2_FXP_INIT);
232: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
233: send_msg(fd_out, &msg);
234:
235: buffer_clear(&msg);
236:
237: get_msg(fd_in, &msg);
238:
1.3 stevesk 239: /* Expecting a VERSION reply */
1.1 djm 240: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 241: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 242: type);
243: buffer_free(&msg);
1.23 djm 244: return(NULL);
1.1 djm 245: }
246: version = buffer_get_int(&msg);
247:
248: debug2("Remote version: %d", version);
249:
250: /* Check for extensions */
251: while (buffer_len(&msg) > 0) {
252: char *name = buffer_get_string(&msg, NULL);
253: char *value = buffer_get_string(&msg, NULL);
254:
255: debug2("Init extension: \"%s\"", name);
256: xfree(name);
257: xfree(value);
258: }
259:
260: buffer_free(&msg);
1.11 djm 261:
1.23 djm 262: ret = xmalloc(sizeof(*ret));
263: ret->fd_in = fd_in;
264: ret->fd_out = fd_out;
265: ret->transfer_buflen = transfer_buflen;
266: ret->num_requests = num_requests;
267: ret->version = version;
268: ret->msg_id = 1;
269:
270: /* Some filexfer v.0 servers don't support large packets */
271: if (version == 0)
1.29 markus 272: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 273:
274: return(ret);
275: }
276:
277: u_int
278: sftp_proto_version(struct sftp_conn *conn)
279: {
280: return(conn->version);
1.1 djm 281: }
282:
283: int
1.23 djm 284: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 285: {
286: u_int id, status;
287: Buffer msg;
288:
289: buffer_init(&msg);
290:
1.23 djm 291: id = conn->msg_id++;
1.1 djm 292: buffer_put_char(&msg, SSH2_FXP_CLOSE);
293: buffer_put_int(&msg, id);
294: buffer_put_string(&msg, handle, handle_len);
1.23 djm 295: send_msg(conn->fd_out, &msg);
1.33 deraadt 296: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 297:
1.23 djm 298: status = get_status(conn->fd_in, id);
1.1 djm 299: if (status != SSH2_FX_OK)
300: error("Couldn't close file: %s", fx2txt(status));
301:
302: buffer_free(&msg);
303:
304: return(status);
305: }
306:
1.12 djm 307:
1.17 itojun 308: static int
1.23 djm 309: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 310: SFTP_DIRENT ***dir)
1.1 djm 311: {
312: Buffer msg;
1.55 djm 313: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 314: char *handle;
315:
1.23 djm 316: id = conn->msg_id++;
1.1 djm 317:
318: buffer_init(&msg);
319: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
320: buffer_put_int(&msg, id);
321: buffer_put_cstring(&msg, path);
1.23 djm 322: send_msg(conn->fd_out, &msg);
1.1 djm 323:
324: buffer_clear(&msg);
325:
1.23 djm 326: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 327: if (handle == NULL)
328: return(-1);
329:
1.12 djm 330: if (dir) {
331: ents = 0;
332: *dir = xmalloc(sizeof(**dir));
333: (*dir)[0] = NULL;
334: }
335:
1.49 djm 336: for (; !interrupted;) {
1.23 djm 337: id = expected_id = conn->msg_id++;
1.1 djm 338:
1.33 deraadt 339: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 340:
341: buffer_clear(&msg);
342: buffer_put_char(&msg, SSH2_FXP_READDIR);
343: buffer_put_int(&msg, id);
344: buffer_put_string(&msg, handle, handle_len);
1.23 djm 345: send_msg(conn->fd_out, &msg);
1.1 djm 346:
347: buffer_clear(&msg);
348:
1.23 djm 349: get_msg(conn->fd_in, &msg);
1.1 djm 350:
351: type = buffer_get_char(&msg);
352: id = buffer_get_int(&msg);
353:
1.33 deraadt 354: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 355:
356: if (id != expected_id)
1.33 deraadt 357: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 358:
359: if (type == SSH2_FXP_STATUS) {
360: int status = buffer_get_int(&msg);
361:
362: debug3("Received SSH2_FXP_STATUS %d", status);
363:
364: if (status == SSH2_FX_EOF) {
365: break;
366: } else {
367: error("Couldn't read directory: %s",
368: fx2txt(status));
1.23 djm 369: do_close(conn, handle, handle_len);
1.42 markus 370: xfree(handle);
1.9 djm 371: return(status);
1.1 djm 372: }
373: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 374: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 375: SSH2_FXP_NAME, type);
376:
377: count = buffer_get_int(&msg);
1.7 markus 378: if (count == 0)
379: break;
1.8 stevesk 380: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 381: for (i = 0; i < count; i++) {
1.1 djm 382: char *filename, *longname;
383: Attrib *a;
384:
385: filename = buffer_get_string(&msg, NULL);
386: longname = buffer_get_string(&msg, NULL);
387: a = decode_attrib(&msg);
388:
1.12 djm 389: if (printflag)
390: printf("%s\n", longname);
391:
392: if (dir) {
1.16 markus 393: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 394: (ents + 2));
395: (*dir)[ents] = xmalloc(sizeof(***dir));
396: (*dir)[ents]->filename = xstrdup(filename);
397: (*dir)[ents]->longname = xstrdup(longname);
398: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
399: (*dir)[++ents] = NULL;
400: }
1.1 djm 401:
402: xfree(filename);
403: xfree(longname);
404: }
405: }
406:
407: buffer_free(&msg);
1.23 djm 408: do_close(conn, handle, handle_len);
1.1 djm 409: xfree(handle);
410:
1.49 djm 411: /* Don't return partial matches on interrupt */
412: if (interrupted && dir != NULL && *dir != NULL) {
413: free_sftp_dirents(*dir);
414: *dir = xmalloc(sizeof(**dir));
415: **dir = NULL;
416: }
417:
1.1 djm 418: return(0);
1.12 djm 419: }
420:
421: int
1.23 djm 422: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 423: {
1.23 djm 424: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 425: }
426:
427: void free_sftp_dirents(SFTP_DIRENT **s)
428: {
429: int i;
1.19 deraadt 430:
431: for (i = 0; s[i]; i++) {
1.12 djm 432: xfree(s[i]->filename);
433: xfree(s[i]->longname);
434: xfree(s[i]);
435: }
436: xfree(s);
437: }
438:
439: int
1.23 djm 440: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 441: {
442: u_int status, id;
443:
444: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
445:
1.23 djm 446: id = conn->msg_id++;
1.28 markus 447: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 448: strlen(path));
449: status = get_status(conn->fd_in, id);
1.1 djm 450: if (status != SSH2_FX_OK)
451: error("Couldn't delete file: %s", fx2txt(status));
452: return(status);
453: }
454:
455: int
1.23 djm 456: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 457: {
458: u_int status, id;
459:
1.23 djm 460: id = conn->msg_id++;
461: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 462: strlen(path), a);
463:
1.23 djm 464: status = get_status(conn->fd_in, id);
1.1 djm 465: if (status != SSH2_FX_OK)
466: error("Couldn't create directory: %s", fx2txt(status));
467:
468: return(status);
469: }
470:
471: int
1.23 djm 472: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 473: {
474: u_int status, id;
475:
1.23 djm 476: id = conn->msg_id++;
477: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
478: strlen(path));
1.1 djm 479:
1.23 djm 480: status = get_status(conn->fd_in, id);
1.1 djm 481: if (status != SSH2_FX_OK)
482: error("Couldn't remove directory: %s", fx2txt(status));
483:
484: return(status);
485: }
486:
487: Attrib *
1.23 djm 488: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 489: {
490: u_int id;
491:
1.23 djm 492: id = conn->msg_id++;
493:
1.28 markus 494: send_string_request(conn->fd_out, id,
495: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 496: path, strlen(path));
497:
498: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 499: }
500:
501: Attrib *
1.23 djm 502: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 503: {
504: u_int id;
505:
1.23 djm 506: if (conn->version == 0) {
507: if (quiet)
508: debug("Server version does not support lstat operation");
509: else
1.43 itojun 510: logit("Server version does not support lstat operation");
1.30 markus 511: return(do_stat(conn, path, quiet));
1.23 djm 512: }
513:
514: id = conn->msg_id++;
515: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
516: strlen(path));
517:
518: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 519: }
520:
521: Attrib *
1.23 djm 522: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 523: {
524: u_int id;
525:
1.23 djm 526: id = conn->msg_id++;
527: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
528: handle_len);
529:
530: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 531: }
532:
533: int
1.23 djm 534: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 535: {
536: u_int status, id;
537:
1.23 djm 538: id = conn->msg_id++;
539: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 540: strlen(path), a);
541:
1.23 djm 542: status = get_status(conn->fd_in, id);
1.1 djm 543: if (status != SSH2_FX_OK)
544: error("Couldn't setstat on \"%s\": %s", path,
545: fx2txt(status));
546:
547: return(status);
548: }
549:
550: int
1.23 djm 551: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 552: Attrib *a)
553: {
554: u_int status, id;
555:
1.23 djm 556: id = conn->msg_id++;
557: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 558: handle_len, a);
559:
1.23 djm 560: status = get_status(conn->fd_in, id);
1.1 djm 561: if (status != SSH2_FX_OK)
562: error("Couldn't fsetstat: %s", fx2txt(status));
563:
564: return(status);
565: }
566:
567: char *
1.23 djm 568: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 569: {
570: Buffer msg;
571: u_int type, expected_id, count, id;
572: char *filename, *longname;
573: Attrib *a;
574:
1.23 djm 575: expected_id = id = conn->msg_id++;
576: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
577: strlen(path));
1.1 djm 578:
579: buffer_init(&msg);
580:
1.23 djm 581: get_msg(conn->fd_in, &msg);
1.1 djm 582: type = buffer_get_char(&msg);
583: id = buffer_get_int(&msg);
584:
585: if (id != expected_id)
1.33 deraadt 586: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 587:
588: if (type == SSH2_FXP_STATUS) {
589: u_int status = buffer_get_int(&msg);
590:
591: error("Couldn't canonicalise: %s", fx2txt(status));
592: return(NULL);
593: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 594: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 595: SSH2_FXP_NAME, type);
596:
597: count = buffer_get_int(&msg);
598: if (count != 1)
599: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
600:
601: filename = buffer_get_string(&msg, NULL);
602: longname = buffer_get_string(&msg, NULL);
603: a = decode_attrib(&msg);
604:
605: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
606:
607: xfree(longname);
608:
609: buffer_free(&msg);
610:
611: return(filename);
612: }
613:
614: int
1.23 djm 615: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 616: {
617: Buffer msg;
618: u_int status, id;
619:
620: buffer_init(&msg);
621:
622: /* Send rename request */
1.23 djm 623: id = conn->msg_id++;
1.1 djm 624: buffer_put_char(&msg, SSH2_FXP_RENAME);
625: buffer_put_int(&msg, id);
626: buffer_put_cstring(&msg, oldpath);
627: buffer_put_cstring(&msg, newpath);
1.23 djm 628: send_msg(conn->fd_out, &msg);
1.1 djm 629: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
630: newpath);
631: buffer_free(&msg);
632:
1.23 djm 633: status = get_status(conn->fd_in, id);
1.1 djm 634: if (status != SSH2_FX_OK)
1.23 djm 635: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
636: newpath, fx2txt(status));
1.1 djm 637:
638: return(status);
1.11 djm 639: }
640:
641: int
1.23 djm 642: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 643: {
644: Buffer msg;
645: u_int status, id;
646:
1.23 djm 647: if (conn->version < 3) {
648: error("This server does not support the symlink operation");
649: return(SSH2_FX_OP_UNSUPPORTED);
650: }
651:
1.11 djm 652: buffer_init(&msg);
653:
1.48 djm 654: /* Send symlink request */
1.23 djm 655: id = conn->msg_id++;
1.11 djm 656: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
657: buffer_put_int(&msg, id);
658: buffer_put_cstring(&msg, oldpath);
659: buffer_put_cstring(&msg, newpath);
1.23 djm 660: send_msg(conn->fd_out, &msg);
1.11 djm 661: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
662: newpath);
663: buffer_free(&msg);
664:
1.23 djm 665: status = get_status(conn->fd_in, id);
1.11 djm 666: if (status != SSH2_FX_OK)
1.36 markus 667: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 668: newpath, fx2txt(status));
1.11 djm 669:
670: return(status);
671: }
672:
673: char *
1.23 djm 674: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 675: {
676: Buffer msg;
677: u_int type, expected_id, count, id;
678: char *filename, *longname;
679: Attrib *a;
680:
1.23 djm 681: expected_id = id = conn->msg_id++;
682: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
683: strlen(path));
1.11 djm 684:
685: buffer_init(&msg);
686:
1.23 djm 687: get_msg(conn->fd_in, &msg);
1.11 djm 688: type = buffer_get_char(&msg);
689: id = buffer_get_int(&msg);
690:
691: if (id != expected_id)
1.33 deraadt 692: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 693:
694: if (type == SSH2_FXP_STATUS) {
695: u_int status = buffer_get_int(&msg);
696:
697: error("Couldn't readlink: %s", fx2txt(status));
698: return(NULL);
699: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 700: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 701: SSH2_FXP_NAME, type);
702:
703: count = buffer_get_int(&msg);
704: if (count != 1)
705: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
706:
707: filename = buffer_get_string(&msg, NULL);
708: longname = buffer_get_string(&msg, NULL);
709: a = decode_attrib(&msg);
710:
711: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
712:
713: xfree(longname);
714:
715: buffer_free(&msg);
716:
717: return(filename);
1.1 djm 718: }
719:
1.21 djm 720: static void
721: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
722: char *handle, u_int handle_len)
723: {
724: Buffer msg;
1.28 markus 725:
1.21 djm 726: buffer_init(&msg);
727: buffer_clear(&msg);
728: buffer_put_char(&msg, SSH2_FXP_READ);
729: buffer_put_int(&msg, id);
730: buffer_put_string(&msg, handle, handle_len);
731: buffer_put_int64(&msg, offset);
732: buffer_put_int(&msg, len);
733: send_msg(fd_out, &msg);
734: buffer_free(&msg);
1.28 markus 735: }
1.21 djm 736:
1.1 djm 737: int
1.23 djm 738: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
739: int pflag)
1.1 djm 740: {
1.21 djm 741: Attrib junk, *a;
742: Buffer msg;
1.1 djm 743: char *handle;
1.57 dtucker 744: int local_fd, status = 0, write_error;
1.21 djm 745: int read_error, write_errno;
746: u_int64_t offset, size;
1.55 djm 747: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 748: off_t progress_counter;
1.21 djm 749: struct request {
750: u_int id;
751: u_int len;
752: u_int64_t offset;
1.28 markus 753: TAILQ_ENTRY(request) tq;
1.21 djm 754: };
755: TAILQ_HEAD(reqhead, request) requests;
756: struct request *req;
757:
758: TAILQ_INIT(&requests);
1.1 djm 759:
1.23 djm 760: a = do_stat(conn, remote_path, 0);
1.1 djm 761: if (a == NULL)
762: return(-1);
763:
764: /* XXX: should we preserve set[ug]id? */
765: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 766: mode = a->perm & 0777;
1.1 djm 767: else
768: mode = 0666;
769:
1.14 djm 770: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 771: (!S_ISREG(a->perm))) {
772: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 773: return(-1);
774: }
775:
1.21 djm 776: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
777: size = a->size;
778: else
779: size = 0;
780:
1.23 djm 781: buflen = conn->transfer_buflen;
1.1 djm 782: buffer_init(&msg);
783:
784: /* Send open request */
1.23 djm 785: id = conn->msg_id++;
1.1 djm 786: buffer_put_char(&msg, SSH2_FXP_OPEN);
787: buffer_put_int(&msg, id);
788: buffer_put_cstring(&msg, remote_path);
789: buffer_put_int(&msg, SSH2_FXF_READ);
790: attrib_clear(&junk); /* Send empty attributes */
791: encode_attrib(&msg, &junk);
1.23 djm 792: send_msg(conn->fd_out, &msg);
1.33 deraadt 793: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 794:
1.23 djm 795: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 796: if (handle == NULL) {
797: buffer_free(&msg);
798: return(-1);
799: }
800:
1.45 djm 801: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 802: mode | S_IWRITE);
1.23 djm 803: if (local_fd == -1) {
804: error("Couldn't open local file \"%s\" for writing: %s",
805: local_path, strerror(errno));
1.24 markus 806: buffer_free(&msg);
807: xfree(handle);
1.23 djm 808: return(-1);
809: }
810:
1.1 djm 811: /* Read from remote and write to local */
1.21 djm 812: write_error = read_error = write_errno = num_req = offset = 0;
813: max_req = 1;
1.39 fgsch 814: progress_counter = 0;
815:
1.47 djm 816: if (showprogress && size != 0)
817: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 818:
1.21 djm 819: while (num_req > 0 || max_req > 0) {
820: char *data;
1.1 djm 821: u_int len;
822:
1.49 djm 823: /*
1.51 deraadt 824: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 825: * allow outstanding requests to drain gracefully
826: */
827: if (interrupted) {
828: if (num_req == 0) /* If we haven't started yet... */
829: break;
830: max_req = 0;
831: }
832:
1.21 djm 833: /* Send some more requests */
834: while (num_req < max_req) {
1.28 markus 835: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 836: (unsigned long long)offset,
837: (unsigned long long)offset + buflen - 1,
838: num_req, max_req);
1.21 djm 839: req = xmalloc(sizeof(*req));
1.23 djm 840: req->id = conn->msg_id++;
1.21 djm 841: req->len = buflen;
842: req->offset = offset;
843: offset += buflen;
844: num_req++;
845: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 846: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 847: req->len, handle, handle_len);
848: }
1.1 djm 849:
850: buffer_clear(&msg);
1.23 djm 851: get_msg(conn->fd_in, &msg);
1.1 djm 852: type = buffer_get_char(&msg);
853: id = buffer_get_int(&msg);
1.33 deraadt 854: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 855:
856: /* Find the request in our queue */
1.53 deraadt 857: for (req = TAILQ_FIRST(&requests);
1.21 djm 858: req != NULL && req->id != id;
859: req = TAILQ_NEXT(req, tq))
860: ;
861: if (req == NULL)
862: fatal("Unexpected reply %u", id);
863:
864: switch (type) {
865: case SSH2_FXP_STATUS:
1.5 djm 866: status = buffer_get_int(&msg);
1.21 djm 867: if (status != SSH2_FX_EOF)
868: read_error = 1;
869: max_req = 0;
870: TAILQ_REMOVE(&requests, req, tq);
871: xfree(req);
872: num_req--;
873: break;
874: case SSH2_FXP_DATA:
875: data = buffer_get_string(&msg, &len);
1.26 itojun 876: debug3("Received data %llu -> %llu",
1.28 markus 877: (unsigned long long)req->offset,
1.26 itojun 878: (unsigned long long)req->offset + len - 1);
1.21 djm 879: if (len > req->len)
880: fatal("Received more data than asked for "
1.37 deraadt 881: "%u > %u", len, req->len);
1.21 djm 882: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 883: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 884: !write_error) {
885: write_errno = errno;
886: write_error = 1;
887: max_req = 0;
888: }
1.39 fgsch 889: progress_counter += len;
1.21 djm 890: xfree(data);
1.1 djm 891:
1.21 djm 892: if (len == req->len) {
893: TAILQ_REMOVE(&requests, req, tq);
894: xfree(req);
895: num_req--;
896: } else {
897: /* Resend the request for the missing data */
898: debug3("Short data block, re-requesting "
1.26 itojun 899: "%llu -> %llu (%2d)",
1.28 markus 900: (unsigned long long)req->offset + len,
1.27 itojun 901: (unsigned long long)req->offset +
902: req->len - 1, num_req);
1.23 djm 903: req->id = conn->msg_id++;
1.21 djm 904: req->len -= len;
905: req->offset += len;
1.28 markus 906: send_read_request(conn->fd_out, req->id,
1.23 djm 907: req->offset, req->len, handle, handle_len);
1.21 djm 908: /* Reduce the request size */
909: if (len < buflen)
910: buflen = MAX(MIN_READ_SIZE, len);
911: }
912: if (max_req > 0) { /* max_req = 0 iff EOF received */
913: if (size > 0 && offset > size) {
914: /* Only one request at a time
915: * after the expected EOF */
916: debug3("Finish at %llu (%2d)",
1.26 itojun 917: (unsigned long long)offset,
918: num_req);
1.21 djm 919: max_req = 1;
1.49 djm 920: } else if (max_req <= conn->num_requests) {
1.21 djm 921: ++max_req;
922: }
1.1 djm 923: }
1.21 djm 924: break;
925: default:
1.33 deraadt 926: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 927: SSH2_FXP_DATA, type);
928: }
1.21 djm 929: }
1.1 djm 930:
1.39 fgsch 931: if (showprogress && size)
932: stop_progress_meter();
933:
1.21 djm 934: /* Sanity check */
935: if (TAILQ_FIRST(&requests) != NULL)
936: fatal("Transfer complete, but requests still in queue");
937:
938: if (read_error) {
1.28 markus 939: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 940: remote_path, fx2txt(status));
1.23 djm 941: do_close(conn, handle, handle_len);
1.21 djm 942: } else if (write_error) {
943: error("Couldn't write to \"%s\": %s", local_path,
944: strerror(write_errno));
945: status = -1;
1.23 djm 946: do_close(conn, handle, handle_len);
1.21 djm 947: } else {
1.23 djm 948: status = do_close(conn, handle, handle_len);
1.21 djm 949:
950: /* Override umask and utimes if asked */
951: if (pflag && fchmod(local_fd, mode) == -1)
952: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 953: strerror(errno));
1.21 djm 954: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
955: struct timeval tv[2];
956: tv[0].tv_sec = a->atime;
957: tv[1].tv_sec = a->mtime;
958: tv[0].tv_usec = tv[1].tv_usec = 0;
959: if (utimes(local_path, tv) == -1)
960: error("Can't set times on \"%s\": %s",
1.37 deraadt 961: local_path, strerror(errno));
1.1 djm 962: }
1.10 djm 963: }
1.5 djm 964: close(local_fd);
965: buffer_free(&msg);
1.1 djm 966: xfree(handle);
1.23 djm 967:
968: return(status);
1.1 djm 969: }
970:
971: int
1.23 djm 972: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
973: int pflag)
1.1 djm 974: {
1.20 djm 975: int local_fd, status;
1.22 djm 976: u_int handle_len, id, type;
1.1 djm 977: u_int64_t offset;
1.20 djm 978: char *handle, *data;
1.1 djm 979: Buffer msg;
980: struct stat sb;
981: Attrib a;
1.21 djm 982: u_int32_t startid;
983: u_int32_t ackid;
1.22 djm 984: struct outstanding_ack {
985: u_int id;
986: u_int len;
987: u_int64_t offset;
1.28 markus 988: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 989: };
990: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 991: struct outstanding_ack *ack = NULL;
1.22 djm 992:
993: TAILQ_INIT(&acks);
1.1 djm 994:
995: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
996: error("Couldn't open local file \"%s\" for reading: %s",
997: local_path, strerror(errno));
998: return(-1);
999: }
1000: if (fstat(local_fd, &sb) == -1) {
1001: error("Couldn't fstat local file \"%s\": %s",
1002: local_path, strerror(errno));
1.41 djm 1003: close(local_fd);
1004: return(-1);
1005: }
1006: if (!S_ISREG(sb.st_mode)) {
1007: error("%s is not a regular file", local_path);
1.1 djm 1008: close(local_fd);
1009: return(-1);
1010: }
1011: stat_to_attrib(&sb, &a);
1012:
1013: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1014: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1015: a.perm &= 0777;
1016: if (!pflag)
1017: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1018:
1019: buffer_init(&msg);
1020:
1021: /* Send open request */
1.23 djm 1022: id = conn->msg_id++;
1.1 djm 1023: buffer_put_char(&msg, SSH2_FXP_OPEN);
1024: buffer_put_int(&msg, id);
1025: buffer_put_cstring(&msg, remote_path);
1026: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1027: encode_attrib(&msg, &a);
1.23 djm 1028: send_msg(conn->fd_out, &msg);
1.33 deraadt 1029: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1030:
1031: buffer_clear(&msg);
1032:
1.23 djm 1033: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1034: if (handle == NULL) {
1035: close(local_fd);
1036: buffer_free(&msg);
1037: return(-1);
1038: }
1039:
1.21 djm 1040: startid = ackid = id + 1;
1.23 djm 1041: data = xmalloc(conn->transfer_buflen);
1.20 djm 1042:
1.1 djm 1043: /* Read from local and write to remote */
1044: offset = 0;
1.39 fgsch 1045: if (showprogress)
1046: start_progress_meter(local_path, sb.st_size, &offset);
1047:
1.19 deraadt 1048: for (;;) {
1.1 djm 1049: int len;
1050:
1051: /*
1.51 deraadt 1052: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1053: * thus losing the last block of the file.
1.51 deraadt 1054: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1055: * server to drain.
1.1 djm 1056: */
1.49 djm 1057: if (interrupted)
1058: len = 0;
1059: else do
1.23 djm 1060: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1061: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1062:
1063: if (len == -1)
1064: fatal("Couldn't read from \"%s\": %s", local_path,
1065: strerror(errno));
1.21 djm 1066:
1067: if (len != 0) {
1.22 djm 1068: ack = xmalloc(sizeof(*ack));
1069: ack->id = ++id;
1070: ack->offset = offset;
1071: ack->len = len;
1072: TAILQ_INSERT_TAIL(&acks, ack, tq);
1073:
1.21 djm 1074: buffer_clear(&msg);
1075: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1076: buffer_put_int(&msg, ack->id);
1.21 djm 1077: buffer_put_string(&msg, handle, handle_len);
1078: buffer_put_int64(&msg, offset);
1079: buffer_put_string(&msg, data, len);
1.23 djm 1080: send_msg(conn->fd_out, &msg);
1.33 deraadt 1081: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1082: id, (unsigned long long)offset, len);
1.22 djm 1083: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1084: break;
1085:
1.22 djm 1086: if (ack == NULL)
1087: fatal("Unexpected ACK %u", id);
1088:
1.28 markus 1089: if (id == startid || len == 0 ||
1.23 djm 1090: id - ackid >= conn->num_requests) {
1.32 markus 1091: u_int r_id;
1.31 djm 1092:
1.22 djm 1093: buffer_clear(&msg);
1.23 djm 1094: get_msg(conn->fd_in, &msg);
1.22 djm 1095: type = buffer_get_char(&msg);
1.31 djm 1096: r_id = buffer_get_int(&msg);
1.22 djm 1097:
1098: if (type != SSH2_FXP_STATUS)
1099: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1100: "got %d", SSH2_FXP_STATUS, type);
1101:
1102: status = buffer_get_int(&msg);
1103: debug3("SSH2_FXP_STATUS %d", status);
1104:
1105: /* Find the request in our queue */
1.53 deraadt 1106: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1107: ack != NULL && ack->id != r_id;
1.22 djm 1108: ack = TAILQ_NEXT(ack, tq))
1109: ;
1110: if (ack == NULL)
1.33 deraadt 1111: fatal("Can't find request for ID %u", r_id);
1.22 djm 1112: TAILQ_REMOVE(&acks, ack, tq);
1113:
1.21 djm 1114: if (status != SSH2_FX_OK) {
1115: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1116: remote_path, fx2txt(status));
1.23 djm 1117: do_close(conn, handle, handle_len);
1.21 djm 1118: close(local_fd);
1.42 markus 1119: xfree(data);
1120: xfree(ack);
1.21 djm 1121: goto done;
1122: }
1.33 deraadt 1123: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1124: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1125: ++ackid;
1.34 deraadt 1126: xfree(ack);
1.1 djm 1127: }
1128: offset += len;
1129: }
1.39 fgsch 1130: if (showprogress)
1131: stop_progress_meter();
1.20 djm 1132: xfree(data);
1.1 djm 1133:
1134: if (close(local_fd) == -1) {
1135: error("Couldn't close local file \"%s\": %s", local_path,
1136: strerror(errno));
1.23 djm 1137: do_close(conn, handle, handle_len);
1.5 djm 1138: status = -1;
1139: goto done;
1.1 djm 1140: }
1141:
1.10 djm 1142: /* Override umask and utimes if asked */
1143: if (pflag)
1.23 djm 1144: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1145:
1.23 djm 1146: status = do_close(conn, handle, handle_len);
1.5 djm 1147:
1148: done:
1149: xfree(handle);
1150: buffer_free(&msg);
1.23 djm 1151: return(status);
1.1 djm 1152: }
![[BACK]](/icons/back.gif){kind=icon}
Return to sftp-client.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh