Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.73
1.73 ! stevesk 1: /* $OpenBSD: sftp-client.c,v 1.72 2006/07/26 02:35:17 stevesk Exp $ */
1.1 djm 2: /*
1.46 djm 3: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 4: *
1.46 djm 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.
1.1 djm 8: *
1.46 djm 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.
1.1 djm 16: */
17:
18: /* XXX: memleaks */
19: /* XXX: signed vs unsigned */
1.23 djm 20: /* XXX: remove all logging, only return status codes */
1.1 djm 21: /* XXX: copy between two remote sites */
22:
23: #include "includes.h"
1.21 djm 24:
25: #include <sys/queue.h>
1.60 stevesk 26: #include <sys/types.h>
27: #include <sys/stat.h>
1.71 stevesk 28: #include <sys/time.h>
1.72 stevesk 29: #include <sys/param.h>
1.66 stevesk 30:
1.67 stevesk 31: #include <errno.h>
1.66 stevesk 32: #include <fcntl.h>
1.70 stevesk 33: #include <signal.h>
1.73 ! stevesk 34: #include <stdio.h>
1.69 stevesk 35: #include <string.h>
1.68 stevesk 36: #include <unistd.h>
1.1 djm 37:
38: #include "buffer.h"
39: #include "bufaux.h"
40: #include "xmalloc.h"
41: #include "log.h"
42: #include "atomicio.h"
1.39 fgsch 43: #include "progressmeter.h"
1.64 djm 44: #include "misc.h"
1.1 djm 45:
46: #include "sftp.h"
47: #include "sftp-common.h"
48: #include "sftp-client.h"
49:
1.49 djm 50: extern volatile sig_atomic_t interrupted;
1.39 fgsch 51: extern int showprogress;
52:
1.59 david 53: /* Minimum amount of data to read at a time */
1.21 djm 54: #define MIN_READ_SIZE 512
55:
1.23 djm 56: struct sftp_conn {
57: int fd_in;
58: int fd_out;
59: u_int transfer_buflen;
60: u_int num_requests;
61: u_int version;
62: u_int msg_id;
63: };
1.4 djm 64:
1.17 itojun 65: static void
1.1 djm 66: send_msg(int fd, Buffer *m)
67: {
1.40 djm 68: u_char mlen[4];
1.65 djm 69: struct iovec iov[2];
1.40 djm 70:
1.58 djm 71: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 72: fatal("Outbound message too long %u", buffer_len(m));
73:
74: /* Send length first */
1.64 djm 75: put_u32(mlen, buffer_len(m));
1.65 djm 76: iov[0].iov_base = mlen;
77: iov[0].iov_len = sizeof(mlen);
78: iov[1].iov_base = buffer_ptr(m);
79: iov[1].iov_len = buffer_len(m);
80:
81: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 82: fatal("Couldn't send packet: %s", strerror(errno));
83:
1.40 djm 84: buffer_clear(m);
1.1 djm 85: }
86:
1.17 itojun 87: static void
1.1 djm 88: get_msg(int fd, Buffer *m)
89: {
1.40 djm 90: u_int msg_len;
1.1 djm 91:
1.40 djm 92: buffer_append_space(m, 4);
1.54 avsm 93: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
94: if (errno == EPIPE)
95: fatal("Connection closed");
96: else
97: fatal("Couldn't read packet: %s", strerror(errno));
98: }
1.1 djm 99:
1.40 djm 100: msg_len = buffer_get_int(m);
1.58 djm 101: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 102: fatal("Received message too long %u", msg_len);
1.1 djm 103:
1.40 djm 104: buffer_append_space(m, msg_len);
1.54 avsm 105: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
106: if (errno == EPIPE)
107: fatal("Connection closed");
108: else
109: fatal("Read packet: %s", strerror(errno));
110: }
1.1 djm 111: }
112:
1.17 itojun 113: static void
1.1 djm 114: send_string_request(int fd, u_int id, u_int code, char *s,
115: u_int len)
116: {
117: Buffer msg;
118:
119: buffer_init(&msg);
120: buffer_put_char(&msg, code);
121: buffer_put_int(&msg, id);
122: buffer_put_string(&msg, s, len);
123: send_msg(fd, &msg);
1.33 deraadt 124: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 125: buffer_free(&msg);
126: }
127:
1.17 itojun 128: static void
1.1 djm 129: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
130: u_int len, Attrib *a)
131: {
132: Buffer msg;
133:
134: buffer_init(&msg);
135: buffer_put_char(&msg, code);
136: buffer_put_int(&msg, id);
137: buffer_put_string(&msg, s, len);
138: encode_attrib(&msg, a);
139: send_msg(fd, &msg);
1.33 deraadt 140: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 141: buffer_free(&msg);
142: }
143:
1.17 itojun 144: static u_int
1.33 deraadt 145: get_status(int fd, u_int expected_id)
1.1 djm 146: {
147: Buffer msg;
148: u_int type, id, status;
149:
150: buffer_init(&msg);
151: get_msg(fd, &msg);
152: type = buffer_get_char(&msg);
153: id = buffer_get_int(&msg);
154:
155: if (id != expected_id)
1.33 deraadt 156: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 157: if (type != SSH2_FXP_STATUS)
1.33 deraadt 158: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 159: SSH2_FXP_STATUS, type);
160:
161: status = buffer_get_int(&msg);
162: buffer_free(&msg);
163:
1.33 deraadt 164: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 165:
166: return(status);
167: }
168:
1.17 itojun 169: static char *
1.1 djm 170: get_handle(int fd, u_int expected_id, u_int *len)
171: {
172: Buffer msg;
173: u_int type, id;
174: char *handle;
175:
176: buffer_init(&msg);
177: get_msg(fd, &msg);
178: type = buffer_get_char(&msg);
179: id = buffer_get_int(&msg);
180:
181: if (id != expected_id)
1.33 deraadt 182: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 183: if (type == SSH2_FXP_STATUS) {
184: int status = buffer_get_int(&msg);
185:
186: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 187: buffer_free(&msg);
1.1 djm 188: return(NULL);
189: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 190: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 191: SSH2_FXP_HANDLE, type);
192:
193: handle = buffer_get_string(&msg, len);
194: buffer_free(&msg);
195:
196: return(handle);
197: }
198:
1.17 itojun 199: static Attrib *
1.14 djm 200: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 201: {
202: Buffer msg;
203: u_int type, id;
204: Attrib *a;
205:
206: buffer_init(&msg);
207: get_msg(fd, &msg);
208:
209: type = buffer_get_char(&msg);
210: id = buffer_get_int(&msg);
211:
1.33 deraadt 212: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 213: if (id != expected_id)
1.33 deraadt 214: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 215: if (type == SSH2_FXP_STATUS) {
216: int status = buffer_get_int(&msg);
217:
1.14 djm 218: if (quiet)
219: debug("Couldn't stat remote file: %s", fx2txt(status));
220: else
221: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 222: buffer_free(&msg);
1.1 djm 223: return(NULL);
224: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 225: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 226: SSH2_FXP_ATTRS, type);
227: }
228: a = decode_attrib(&msg);
229: buffer_free(&msg);
230:
231: return(a);
232: }
233:
1.23 djm 234: struct sftp_conn *
235: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 236: {
1.33 deraadt 237: u_int type;
238: int version;
1.1 djm 239: Buffer msg;
1.23 djm 240: struct sftp_conn *ret;
1.1 djm 241:
242: buffer_init(&msg);
243: buffer_put_char(&msg, SSH2_FXP_INIT);
244: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
245: send_msg(fd_out, &msg);
246:
247: buffer_clear(&msg);
248:
249: get_msg(fd_in, &msg);
250:
1.3 stevesk 251: /* Expecting a VERSION reply */
1.1 djm 252: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 253: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 254: type);
255: buffer_free(&msg);
1.23 djm 256: return(NULL);
1.1 djm 257: }
258: version = buffer_get_int(&msg);
259:
260: debug2("Remote version: %d", version);
261:
262: /* Check for extensions */
263: while (buffer_len(&msg) > 0) {
264: char *name = buffer_get_string(&msg, NULL);
265: char *value = buffer_get_string(&msg, NULL);
266:
267: debug2("Init extension: \"%s\"", name);
268: xfree(name);
269: xfree(value);
270: }
271:
272: buffer_free(&msg);
1.11 djm 273:
1.23 djm 274: ret = xmalloc(sizeof(*ret));
275: ret->fd_in = fd_in;
276: ret->fd_out = fd_out;
277: ret->transfer_buflen = transfer_buflen;
278: ret->num_requests = num_requests;
279: ret->version = version;
280: ret->msg_id = 1;
281:
282: /* Some filexfer v.0 servers don't support large packets */
283: if (version == 0)
1.29 markus 284: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 285:
286: return(ret);
287: }
288:
289: u_int
290: sftp_proto_version(struct sftp_conn *conn)
291: {
292: return(conn->version);
1.1 djm 293: }
294:
295: int
1.23 djm 296: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 297: {
298: u_int id, status;
299: Buffer msg;
300:
301: buffer_init(&msg);
302:
1.23 djm 303: id = conn->msg_id++;
1.1 djm 304: buffer_put_char(&msg, SSH2_FXP_CLOSE);
305: buffer_put_int(&msg, id);
306: buffer_put_string(&msg, handle, handle_len);
1.23 djm 307: send_msg(conn->fd_out, &msg);
1.33 deraadt 308: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 309:
1.23 djm 310: status = get_status(conn->fd_in, id);
1.1 djm 311: if (status != SSH2_FX_OK)
312: error("Couldn't close file: %s", fx2txt(status));
313:
314: buffer_free(&msg);
315:
316: return(status);
317: }
318:
1.12 djm 319:
1.17 itojun 320: static int
1.23 djm 321: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 322: SFTP_DIRENT ***dir)
1.1 djm 323: {
324: Buffer msg;
1.55 djm 325: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 326: char *handle;
327:
1.23 djm 328: id = conn->msg_id++;
1.1 djm 329:
330: buffer_init(&msg);
331: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
332: buffer_put_int(&msg, id);
333: buffer_put_cstring(&msg, path);
1.23 djm 334: send_msg(conn->fd_out, &msg);
1.1 djm 335:
336: buffer_clear(&msg);
337:
1.23 djm 338: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 339: if (handle == NULL)
340: return(-1);
341:
1.12 djm 342: if (dir) {
343: ents = 0;
344: *dir = xmalloc(sizeof(**dir));
345: (*dir)[0] = NULL;
346: }
347:
1.49 djm 348: for (; !interrupted;) {
1.23 djm 349: id = expected_id = conn->msg_id++;
1.1 djm 350:
1.33 deraadt 351: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 352:
353: buffer_clear(&msg);
354: buffer_put_char(&msg, SSH2_FXP_READDIR);
355: buffer_put_int(&msg, id);
356: buffer_put_string(&msg, handle, handle_len);
1.23 djm 357: send_msg(conn->fd_out, &msg);
1.1 djm 358:
359: buffer_clear(&msg);
360:
1.23 djm 361: get_msg(conn->fd_in, &msg);
1.1 djm 362:
363: type = buffer_get_char(&msg);
364: id = buffer_get_int(&msg);
365:
1.33 deraadt 366: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 367:
368: if (id != expected_id)
1.33 deraadt 369: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 370:
371: if (type == SSH2_FXP_STATUS) {
372: int status = buffer_get_int(&msg);
373:
374: debug3("Received SSH2_FXP_STATUS %d", status);
375:
376: if (status == SSH2_FX_EOF) {
377: break;
378: } else {
379: error("Couldn't read directory: %s",
380: fx2txt(status));
1.23 djm 381: do_close(conn, handle, handle_len);
1.42 markus 382: xfree(handle);
1.9 djm 383: return(status);
1.1 djm 384: }
385: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 386: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 387: SSH2_FXP_NAME, type);
388:
389: count = buffer_get_int(&msg);
1.7 markus 390: if (count == 0)
391: break;
1.8 stevesk 392: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 393: for (i = 0; i < count; i++) {
1.1 djm 394: char *filename, *longname;
395: Attrib *a;
396:
397: filename = buffer_get_string(&msg, NULL);
398: longname = buffer_get_string(&msg, NULL);
399: a = decode_attrib(&msg);
400:
1.12 djm 401: if (printflag)
402: printf("%s\n", longname);
403:
404: if (dir) {
1.62 djm 405: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 406: (*dir)[ents] = xmalloc(sizeof(***dir));
407: (*dir)[ents]->filename = xstrdup(filename);
408: (*dir)[ents]->longname = xstrdup(longname);
409: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
410: (*dir)[++ents] = NULL;
411: }
1.1 djm 412:
413: xfree(filename);
414: xfree(longname);
415: }
416: }
417:
418: buffer_free(&msg);
1.23 djm 419: do_close(conn, handle, handle_len);
1.1 djm 420: xfree(handle);
421:
1.49 djm 422: /* Don't return partial matches on interrupt */
423: if (interrupted && dir != NULL && *dir != NULL) {
424: free_sftp_dirents(*dir);
425: *dir = xmalloc(sizeof(**dir));
426: **dir = NULL;
427: }
428:
1.1 djm 429: return(0);
1.12 djm 430: }
431:
432: int
1.23 djm 433: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 434: {
1.23 djm 435: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 436: }
437:
438: void free_sftp_dirents(SFTP_DIRENT **s)
439: {
440: int i;
1.19 deraadt 441:
442: for (i = 0; s[i]; i++) {
1.12 djm 443: xfree(s[i]->filename);
444: xfree(s[i]->longname);
445: xfree(s[i]);
446: }
447: xfree(s);
448: }
449:
450: int
1.23 djm 451: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 452: {
453: u_int status, id;
454:
455: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
456:
1.23 djm 457: id = conn->msg_id++;
1.28 markus 458: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 459: strlen(path));
460: status = get_status(conn->fd_in, id);
1.1 djm 461: if (status != SSH2_FX_OK)
462: error("Couldn't delete file: %s", fx2txt(status));
463: return(status);
464: }
465:
466: int
1.23 djm 467: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 468: {
469: u_int status, id;
470:
1.23 djm 471: id = conn->msg_id++;
472: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 473: strlen(path), a);
474:
1.23 djm 475: status = get_status(conn->fd_in, id);
1.1 djm 476: if (status != SSH2_FX_OK)
477: error("Couldn't create directory: %s", fx2txt(status));
478:
479: return(status);
480: }
481:
482: int
1.23 djm 483: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 484: {
485: u_int status, id;
486:
1.23 djm 487: id = conn->msg_id++;
488: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
489: strlen(path));
1.1 djm 490:
1.23 djm 491: status = get_status(conn->fd_in, id);
1.1 djm 492: if (status != SSH2_FX_OK)
493: error("Couldn't remove directory: %s", fx2txt(status));
494:
495: return(status);
496: }
497:
498: Attrib *
1.23 djm 499: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 500: {
501: u_int id;
502:
1.23 djm 503: id = conn->msg_id++;
504:
1.28 markus 505: send_string_request(conn->fd_out, id,
506: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 507: path, strlen(path));
508:
509: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 510: }
511:
512: Attrib *
1.23 djm 513: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 514: {
515: u_int id;
516:
1.23 djm 517: if (conn->version == 0) {
518: if (quiet)
519: debug("Server version does not support lstat operation");
520: else
1.43 itojun 521: logit("Server version does not support lstat operation");
1.30 markus 522: return(do_stat(conn, path, quiet));
1.23 djm 523: }
524:
525: id = conn->msg_id++;
526: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
527: strlen(path));
528:
529: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 530: }
531:
532: Attrib *
1.23 djm 533: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 534: {
535: u_int id;
536:
1.23 djm 537: id = conn->msg_id++;
538: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
539: handle_len);
540:
541: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 542: }
543:
544: int
1.23 djm 545: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 546: {
547: u_int status, id;
548:
1.23 djm 549: id = conn->msg_id++;
550: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 551: strlen(path), a);
552:
1.23 djm 553: status = get_status(conn->fd_in, id);
1.1 djm 554: if (status != SSH2_FX_OK)
555: error("Couldn't setstat on \"%s\": %s", path,
556: fx2txt(status));
557:
558: return(status);
559: }
560:
561: int
1.23 djm 562: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 563: Attrib *a)
564: {
565: u_int status, id;
566:
1.23 djm 567: id = conn->msg_id++;
568: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 569: handle_len, a);
570:
1.23 djm 571: status = get_status(conn->fd_in, id);
1.1 djm 572: if (status != SSH2_FX_OK)
573: error("Couldn't fsetstat: %s", fx2txt(status));
574:
575: return(status);
576: }
577:
578: char *
1.23 djm 579: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 580: {
581: Buffer msg;
582: u_int type, expected_id, count, id;
583: char *filename, *longname;
584: Attrib *a;
585:
1.23 djm 586: expected_id = id = conn->msg_id++;
587: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
588: strlen(path));
1.1 djm 589:
590: buffer_init(&msg);
591:
1.23 djm 592: get_msg(conn->fd_in, &msg);
1.1 djm 593: type = buffer_get_char(&msg);
594: id = buffer_get_int(&msg);
595:
596: if (id != expected_id)
1.33 deraadt 597: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 598:
599: if (type == SSH2_FXP_STATUS) {
600: u_int status = buffer_get_int(&msg);
601:
602: error("Couldn't canonicalise: %s", fx2txt(status));
603: return(NULL);
604: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 605: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 606: SSH2_FXP_NAME, type);
607:
608: count = buffer_get_int(&msg);
609: if (count != 1)
610: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
611:
612: filename = buffer_get_string(&msg, NULL);
613: longname = buffer_get_string(&msg, NULL);
614: a = decode_attrib(&msg);
615:
616: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
617:
618: xfree(longname);
619:
620: buffer_free(&msg);
621:
622: return(filename);
623: }
624:
625: int
1.23 djm 626: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 627: {
628: Buffer msg;
629: u_int status, id;
630:
631: buffer_init(&msg);
632:
633: /* Send rename request */
1.23 djm 634: id = conn->msg_id++;
1.1 djm 635: buffer_put_char(&msg, SSH2_FXP_RENAME);
636: buffer_put_int(&msg, id);
637: buffer_put_cstring(&msg, oldpath);
638: buffer_put_cstring(&msg, newpath);
1.23 djm 639: send_msg(conn->fd_out, &msg);
1.1 djm 640: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
641: newpath);
642: buffer_free(&msg);
643:
1.23 djm 644: status = get_status(conn->fd_in, id);
1.1 djm 645: if (status != SSH2_FX_OK)
1.23 djm 646: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
647: newpath, fx2txt(status));
1.1 djm 648:
649: return(status);
1.11 djm 650: }
651:
652: int
1.23 djm 653: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 654: {
655: Buffer msg;
656: u_int status, id;
657:
1.23 djm 658: if (conn->version < 3) {
659: error("This server does not support the symlink operation");
660: return(SSH2_FX_OP_UNSUPPORTED);
661: }
662:
1.11 djm 663: buffer_init(&msg);
664:
1.48 djm 665: /* Send symlink request */
1.23 djm 666: id = conn->msg_id++;
1.11 djm 667: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
668: buffer_put_int(&msg, id);
669: buffer_put_cstring(&msg, oldpath);
670: buffer_put_cstring(&msg, newpath);
1.23 djm 671: send_msg(conn->fd_out, &msg);
1.11 djm 672: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
673: newpath);
674: buffer_free(&msg);
675:
1.23 djm 676: status = get_status(conn->fd_in, id);
1.11 djm 677: if (status != SSH2_FX_OK)
1.36 markus 678: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 679: newpath, fx2txt(status));
1.11 djm 680:
681: return(status);
682: }
683:
684: char *
1.23 djm 685: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 686: {
687: Buffer msg;
688: u_int type, expected_id, count, id;
689: char *filename, *longname;
690: Attrib *a;
691:
1.23 djm 692: expected_id = id = conn->msg_id++;
693: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
694: strlen(path));
1.11 djm 695:
696: buffer_init(&msg);
697:
1.23 djm 698: get_msg(conn->fd_in, &msg);
1.11 djm 699: type = buffer_get_char(&msg);
700: id = buffer_get_int(&msg);
701:
702: if (id != expected_id)
1.33 deraadt 703: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 704:
705: if (type == SSH2_FXP_STATUS) {
706: u_int status = buffer_get_int(&msg);
707:
708: error("Couldn't readlink: %s", fx2txt(status));
709: return(NULL);
710: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 711: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 712: SSH2_FXP_NAME, type);
713:
714: count = buffer_get_int(&msg);
715: if (count != 1)
716: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
717:
718: filename = buffer_get_string(&msg, NULL);
719: longname = buffer_get_string(&msg, NULL);
720: a = decode_attrib(&msg);
721:
722: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
723:
724: xfree(longname);
725:
726: buffer_free(&msg);
727:
728: return(filename);
1.1 djm 729: }
730:
1.21 djm 731: static void
732: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
733: char *handle, u_int handle_len)
734: {
735: Buffer msg;
1.28 markus 736:
1.21 djm 737: buffer_init(&msg);
738: buffer_clear(&msg);
739: buffer_put_char(&msg, SSH2_FXP_READ);
740: buffer_put_int(&msg, id);
741: buffer_put_string(&msg, handle, handle_len);
742: buffer_put_int64(&msg, offset);
743: buffer_put_int(&msg, len);
744: send_msg(fd_out, &msg);
745: buffer_free(&msg);
1.28 markus 746: }
1.21 djm 747:
1.1 djm 748: int
1.23 djm 749: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
750: int pflag)
1.1 djm 751: {
1.21 djm 752: Attrib junk, *a;
753: Buffer msg;
1.1 djm 754: char *handle;
1.57 dtucker 755: int local_fd, status = 0, write_error;
1.21 djm 756: int read_error, write_errno;
757: u_int64_t offset, size;
1.55 djm 758: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 759: off_t progress_counter;
1.21 djm 760: struct request {
761: u_int id;
762: u_int len;
763: u_int64_t offset;
1.28 markus 764: TAILQ_ENTRY(request) tq;
1.21 djm 765: };
766: TAILQ_HEAD(reqhead, request) requests;
767: struct request *req;
768:
769: TAILQ_INIT(&requests);
1.1 djm 770:
1.23 djm 771: a = do_stat(conn, remote_path, 0);
1.1 djm 772: if (a == NULL)
773: return(-1);
774:
775: /* XXX: should we preserve set[ug]id? */
776: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 777: mode = a->perm & 0777;
1.1 djm 778: else
779: mode = 0666;
780:
1.14 djm 781: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 782: (!S_ISREG(a->perm))) {
783: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 784: return(-1);
785: }
786:
1.21 djm 787: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
788: size = a->size;
789: else
790: size = 0;
791:
1.23 djm 792: buflen = conn->transfer_buflen;
1.1 djm 793: buffer_init(&msg);
794:
795: /* Send open request */
1.23 djm 796: id = conn->msg_id++;
1.1 djm 797: buffer_put_char(&msg, SSH2_FXP_OPEN);
798: buffer_put_int(&msg, id);
799: buffer_put_cstring(&msg, remote_path);
800: buffer_put_int(&msg, SSH2_FXF_READ);
801: attrib_clear(&junk); /* Send empty attributes */
802: encode_attrib(&msg, &junk);
1.23 djm 803: send_msg(conn->fd_out, &msg);
1.33 deraadt 804: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 805:
1.23 djm 806: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 807: if (handle == NULL) {
808: buffer_free(&msg);
809: return(-1);
810: }
811:
1.45 djm 812: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 813: mode | S_IWRITE);
1.23 djm 814: if (local_fd == -1) {
815: error("Couldn't open local file \"%s\" for writing: %s",
816: local_path, strerror(errno));
1.24 markus 817: buffer_free(&msg);
818: xfree(handle);
1.23 djm 819: return(-1);
820: }
821:
1.1 djm 822: /* Read from remote and write to local */
1.21 djm 823: write_error = read_error = write_errno = num_req = offset = 0;
824: max_req = 1;
1.39 fgsch 825: progress_counter = 0;
826:
1.47 djm 827: if (showprogress && size != 0)
828: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 829:
1.21 djm 830: while (num_req > 0 || max_req > 0) {
831: char *data;
1.1 djm 832: u_int len;
833:
1.49 djm 834: /*
1.51 deraadt 835: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 836: * allow outstanding requests to drain gracefully
837: */
838: if (interrupted) {
839: if (num_req == 0) /* If we haven't started yet... */
840: break;
841: max_req = 0;
842: }
843:
1.21 djm 844: /* Send some more requests */
845: while (num_req < max_req) {
1.28 markus 846: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 847: (unsigned long long)offset,
848: (unsigned long long)offset + buflen - 1,
849: num_req, max_req);
1.21 djm 850: req = xmalloc(sizeof(*req));
1.23 djm 851: req->id = conn->msg_id++;
1.21 djm 852: req->len = buflen;
853: req->offset = offset;
854: offset += buflen;
855: num_req++;
856: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 857: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 858: req->len, handle, handle_len);
859: }
1.1 djm 860:
861: buffer_clear(&msg);
1.23 djm 862: get_msg(conn->fd_in, &msg);
1.1 djm 863: type = buffer_get_char(&msg);
864: id = buffer_get_int(&msg);
1.33 deraadt 865: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 866:
867: /* Find the request in our queue */
1.53 deraadt 868: for (req = TAILQ_FIRST(&requests);
1.21 djm 869: req != NULL && req->id != id;
870: req = TAILQ_NEXT(req, tq))
871: ;
872: if (req == NULL)
873: fatal("Unexpected reply %u", id);
874:
875: switch (type) {
876: case SSH2_FXP_STATUS:
1.5 djm 877: status = buffer_get_int(&msg);
1.21 djm 878: if (status != SSH2_FX_EOF)
879: read_error = 1;
880: max_req = 0;
881: TAILQ_REMOVE(&requests, req, tq);
882: xfree(req);
883: num_req--;
884: break;
885: case SSH2_FXP_DATA:
886: data = buffer_get_string(&msg, &len);
1.26 itojun 887: debug3("Received data %llu -> %llu",
1.28 markus 888: (unsigned long long)req->offset,
1.26 itojun 889: (unsigned long long)req->offset + len - 1);
1.21 djm 890: if (len > req->len)
891: fatal("Received more data than asked for "
1.37 deraadt 892: "%u > %u", len, req->len);
1.21 djm 893: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 894: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 895: !write_error) {
896: write_errno = errno;
897: write_error = 1;
898: max_req = 0;
899: }
1.39 fgsch 900: progress_counter += len;
1.21 djm 901: xfree(data);
1.1 djm 902:
1.21 djm 903: if (len == req->len) {
904: TAILQ_REMOVE(&requests, req, tq);
905: xfree(req);
906: num_req--;
907: } else {
908: /* Resend the request for the missing data */
909: debug3("Short data block, re-requesting "
1.26 itojun 910: "%llu -> %llu (%2d)",
1.28 markus 911: (unsigned long long)req->offset + len,
1.27 itojun 912: (unsigned long long)req->offset +
913: req->len - 1, num_req);
1.23 djm 914: req->id = conn->msg_id++;
1.21 djm 915: req->len -= len;
916: req->offset += len;
1.28 markus 917: send_read_request(conn->fd_out, req->id,
1.23 djm 918: req->offset, req->len, handle, handle_len);
1.21 djm 919: /* Reduce the request size */
920: if (len < buflen)
921: buflen = MAX(MIN_READ_SIZE, len);
922: }
923: if (max_req > 0) { /* max_req = 0 iff EOF received */
924: if (size > 0 && offset > size) {
925: /* Only one request at a time
926: * after the expected EOF */
927: debug3("Finish at %llu (%2d)",
1.26 itojun 928: (unsigned long long)offset,
929: num_req);
1.21 djm 930: max_req = 1;
1.49 djm 931: } else if (max_req <= conn->num_requests) {
1.21 djm 932: ++max_req;
933: }
1.1 djm 934: }
1.21 djm 935: break;
936: default:
1.33 deraadt 937: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 938: SSH2_FXP_DATA, type);
939: }
1.21 djm 940: }
1.1 djm 941:
1.39 fgsch 942: if (showprogress && size)
943: stop_progress_meter();
944:
1.21 djm 945: /* Sanity check */
946: if (TAILQ_FIRST(&requests) != NULL)
947: fatal("Transfer complete, but requests still in queue");
948:
949: if (read_error) {
1.28 markus 950: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 951: remote_path, fx2txt(status));
1.23 djm 952: do_close(conn, handle, handle_len);
1.21 djm 953: } else if (write_error) {
954: error("Couldn't write to \"%s\": %s", local_path,
955: strerror(write_errno));
956: status = -1;
1.23 djm 957: do_close(conn, handle, handle_len);
1.21 djm 958: } else {
1.23 djm 959: status = do_close(conn, handle, handle_len);
1.21 djm 960:
961: /* Override umask and utimes if asked */
962: if (pflag && fchmod(local_fd, mode) == -1)
963: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 964: strerror(errno));
1.21 djm 965: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
966: struct timeval tv[2];
967: tv[0].tv_sec = a->atime;
968: tv[1].tv_sec = a->mtime;
969: tv[0].tv_usec = tv[1].tv_usec = 0;
970: if (utimes(local_path, tv) == -1)
971: error("Can't set times on \"%s\": %s",
1.37 deraadt 972: local_path, strerror(errno));
1.1 djm 973: }
1.10 djm 974: }
1.5 djm 975: close(local_fd);
976: buffer_free(&msg);
1.1 djm 977: xfree(handle);
1.23 djm 978:
979: return(status);
1.1 djm 980: }
981:
982: int
1.23 djm 983: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
984: int pflag)
1.1 djm 985: {
1.20 djm 986: int local_fd, status;
1.22 djm 987: u_int handle_len, id, type;
1.1 djm 988: u_int64_t offset;
1.20 djm 989: char *handle, *data;
1.1 djm 990: Buffer msg;
991: struct stat sb;
992: Attrib a;
1.21 djm 993: u_int32_t startid;
994: u_int32_t ackid;
1.22 djm 995: struct outstanding_ack {
996: u_int id;
997: u_int len;
998: u_int64_t offset;
1.28 markus 999: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 1000: };
1001: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 1002: struct outstanding_ack *ack = NULL;
1.22 djm 1003:
1004: TAILQ_INIT(&acks);
1.1 djm 1005:
1006: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1007: error("Couldn't open local file \"%s\" for reading: %s",
1008: local_path, strerror(errno));
1009: return(-1);
1010: }
1011: if (fstat(local_fd, &sb) == -1) {
1012: error("Couldn't fstat local file \"%s\": %s",
1013: local_path, strerror(errno));
1.41 djm 1014: close(local_fd);
1015: return(-1);
1016: }
1017: if (!S_ISREG(sb.st_mode)) {
1018: error("%s is not a regular file", local_path);
1.1 djm 1019: close(local_fd);
1020: return(-1);
1021: }
1022: stat_to_attrib(&sb, &a);
1023:
1024: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1025: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1026: a.perm &= 0777;
1027: if (!pflag)
1028: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1029:
1030: buffer_init(&msg);
1031:
1032: /* Send open request */
1.23 djm 1033: id = conn->msg_id++;
1.1 djm 1034: buffer_put_char(&msg, SSH2_FXP_OPEN);
1035: buffer_put_int(&msg, id);
1036: buffer_put_cstring(&msg, remote_path);
1037: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1038: encode_attrib(&msg, &a);
1.23 djm 1039: send_msg(conn->fd_out, &msg);
1.33 deraadt 1040: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1041:
1042: buffer_clear(&msg);
1043:
1.23 djm 1044: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1045: if (handle == NULL) {
1046: close(local_fd);
1047: buffer_free(&msg);
1048: return(-1);
1049: }
1050:
1.21 djm 1051: startid = ackid = id + 1;
1.23 djm 1052: data = xmalloc(conn->transfer_buflen);
1.20 djm 1053:
1.1 djm 1054: /* Read from local and write to remote */
1055: offset = 0;
1.39 fgsch 1056: if (showprogress)
1057: start_progress_meter(local_path, sb.st_size, &offset);
1058:
1.19 deraadt 1059: for (;;) {
1.1 djm 1060: int len;
1061:
1062: /*
1.51 deraadt 1063: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1064: * thus losing the last block of the file.
1.51 deraadt 1065: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1066: * server to drain.
1.1 djm 1067: */
1.49 djm 1068: if (interrupted)
1069: len = 0;
1070: else do
1.23 djm 1071: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1072: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1073:
1074: if (len == -1)
1075: fatal("Couldn't read from \"%s\": %s", local_path,
1076: strerror(errno));
1.21 djm 1077:
1078: if (len != 0) {
1.22 djm 1079: ack = xmalloc(sizeof(*ack));
1080: ack->id = ++id;
1081: ack->offset = offset;
1082: ack->len = len;
1083: TAILQ_INSERT_TAIL(&acks, ack, tq);
1084:
1.21 djm 1085: buffer_clear(&msg);
1086: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1087: buffer_put_int(&msg, ack->id);
1.21 djm 1088: buffer_put_string(&msg, handle, handle_len);
1089: buffer_put_int64(&msg, offset);
1090: buffer_put_string(&msg, data, len);
1.23 djm 1091: send_msg(conn->fd_out, &msg);
1.33 deraadt 1092: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1093: id, (unsigned long long)offset, len);
1.22 djm 1094: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1095: break;
1096:
1.22 djm 1097: if (ack == NULL)
1098: fatal("Unexpected ACK %u", id);
1099:
1.28 markus 1100: if (id == startid || len == 0 ||
1.23 djm 1101: id - ackid >= conn->num_requests) {
1.32 markus 1102: u_int r_id;
1.31 djm 1103:
1.22 djm 1104: buffer_clear(&msg);
1.23 djm 1105: get_msg(conn->fd_in, &msg);
1.22 djm 1106: type = buffer_get_char(&msg);
1.31 djm 1107: r_id = buffer_get_int(&msg);
1.22 djm 1108:
1109: if (type != SSH2_FXP_STATUS)
1110: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1111: "got %d", SSH2_FXP_STATUS, type);
1112:
1113: status = buffer_get_int(&msg);
1114: debug3("SSH2_FXP_STATUS %d", status);
1115:
1116: /* Find the request in our queue */
1.53 deraadt 1117: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1118: ack != NULL && ack->id != r_id;
1.22 djm 1119: ack = TAILQ_NEXT(ack, tq))
1120: ;
1121: if (ack == NULL)
1.33 deraadt 1122: fatal("Can't find request for ID %u", r_id);
1.22 djm 1123: TAILQ_REMOVE(&acks, ack, tq);
1124:
1.21 djm 1125: if (status != SSH2_FX_OK) {
1126: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1127: remote_path, fx2txt(status));
1.23 djm 1128: do_close(conn, handle, handle_len);
1.21 djm 1129: close(local_fd);
1.42 markus 1130: xfree(data);
1131: xfree(ack);
1.21 djm 1132: goto done;
1133: }
1.33 deraadt 1134: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1135: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1136: ++ackid;
1.34 deraadt 1137: xfree(ack);
1.1 djm 1138: }
1139: offset += len;
1140: }
1.39 fgsch 1141: if (showprogress)
1142: stop_progress_meter();
1.20 djm 1143: xfree(data);
1.1 djm 1144:
1145: if (close(local_fd) == -1) {
1146: error("Couldn't close local file \"%s\": %s", local_path,
1147: strerror(errno));
1.23 djm 1148: do_close(conn, handle, handle_len);
1.5 djm 1149: status = -1;
1150: goto done;
1.1 djm 1151: }
1152:
1.10 djm 1153: /* Override umask and utimes if asked */
1154: if (pflag)
1.23 djm 1155: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1156:
1.23 djm 1157: status = do_close(conn, handle, handle_len);
1.5 djm 1158:
1159: done:
1160: xfree(handle);
1161: buffer_free(&msg);
1.23 djm 1162: return(status);
1.1 djm 1163: }
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