Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.35.2.2
1.1 djm 1: /*
1.35.2.1 margarid 2: * Copyright (c) 2001-2003 Damien Miller. All rights reserved.
1.1 djm 3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24:
25: /* XXX: memleaks */
26: /* XXX: signed vs unsigned */
1.23 djm 27: /* XXX: remove all logging, only return status codes */
1.1 djm 28: /* XXX: copy between two remote sites */
29:
30: #include "includes.h"
1.35.2.2! brad 31: RCSID("$OpenBSD: sftp-client.c,v 1.44 2003/06/28 16:23:06 deraadt Exp $");
1.21 djm 32:
33: #include <sys/queue.h>
1.1 djm 34:
35: #include "buffer.h"
36: #include "bufaux.h"
37: #include "getput.h"
38: #include "xmalloc.h"
39: #include "log.h"
40: #include "atomicio.h"
1.35.2.1 margarid 41: #include "progressmeter.h"
1.1 djm 42:
43: #include "sftp.h"
44: #include "sftp-common.h"
45: #include "sftp-client.h"
46:
1.35.2.1 margarid 47: extern int showprogress;
48:
1.21 djm 49: /* Minimum amount of data to read at at time */
50: #define MIN_READ_SIZE 512
51:
1.35.2.1 margarid 52: /* Maximum packet size */
53: #define MAX_MSG_LENGTH (256 * 1024)
54:
1.23 djm 55: struct sftp_conn {
56: int fd_in;
57: int fd_out;
58: u_int transfer_buflen;
59: u_int num_requests;
60: u_int version;
61: u_int msg_id;
62: };
1.4 djm 63:
1.17 itojun 64: static void
1.1 djm 65: send_msg(int fd, Buffer *m)
66: {
1.35.2.1 margarid 67: u_char mlen[4];
68:
69: if (buffer_len(m) > MAX_MSG_LENGTH)
70: fatal("Outbound message too long %u", buffer_len(m));
1.1 djm 71:
1.35.2.1 margarid 72: /* Send length first */
73: PUT_32BIT(mlen, buffer_len(m));
1.35.2.2! brad 74: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) <= 0)
1.1 djm 75: fatal("Couldn't send packet: %s", strerror(errno));
76:
1.35.2.2! brad 77: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) <= 0)
1.35.2.1 margarid 78: fatal("Couldn't send packet: %s", strerror(errno));
79:
80: buffer_clear(m);
1.1 djm 81: }
82:
1.17 itojun 83: static void
1.1 djm 84: get_msg(int fd, Buffer *m)
85: {
1.35.2.1 margarid 86: ssize_t len;
87: u_int msg_len;
1.1 djm 88:
1.35.2.1 margarid 89: buffer_append_space(m, 4);
90: len = atomicio(read, fd, buffer_ptr(m), 4);
1.15 djm 91: if (len == 0)
92: fatal("Connection closed");
93: else if (len == -1)
1.1 djm 94: fatal("Couldn't read packet: %s", strerror(errno));
95:
1.35.2.1 margarid 96: msg_len = buffer_get_int(m);
97: if (msg_len > MAX_MSG_LENGTH)
1.33 deraadt 98: fatal("Received message too long %u", msg_len);
1.1 djm 99:
1.35.2.1 margarid 100: buffer_append_space(m, msg_len);
101: len = atomicio(read, fd, buffer_ptr(m), msg_len);
102: if (len == 0)
103: fatal("Connection closed");
104: else if (len == -1)
105: fatal("Read packet: %s", strerror(errno));
1.1 djm 106: }
107:
1.17 itojun 108: static void
1.1 djm 109: send_string_request(int fd, u_int id, u_int code, char *s,
110: u_int len)
111: {
112: Buffer msg;
113:
114: buffer_init(&msg);
115: buffer_put_char(&msg, code);
116: buffer_put_int(&msg, id);
117: buffer_put_string(&msg, s, len);
118: send_msg(fd, &msg);
1.33 deraadt 119: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 120: buffer_free(&msg);
121: }
122:
1.17 itojun 123: static void
1.1 djm 124: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
125: u_int len, Attrib *a)
126: {
127: Buffer msg;
128:
129: buffer_init(&msg);
130: buffer_put_char(&msg, code);
131: buffer_put_int(&msg, id);
132: buffer_put_string(&msg, s, len);
133: encode_attrib(&msg, a);
134: send_msg(fd, &msg);
1.33 deraadt 135: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 136: buffer_free(&msg);
137: }
138:
1.17 itojun 139: static u_int
1.33 deraadt 140: get_status(int fd, u_int expected_id)
1.1 djm 141: {
142: Buffer msg;
143: u_int type, id, status;
144:
145: buffer_init(&msg);
146: get_msg(fd, &msg);
147: type = buffer_get_char(&msg);
148: id = buffer_get_int(&msg);
149:
150: if (id != expected_id)
1.33 deraadt 151: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 152: if (type != SSH2_FXP_STATUS)
1.33 deraadt 153: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 154: SSH2_FXP_STATUS, type);
155:
156: status = buffer_get_int(&msg);
157: buffer_free(&msg);
158:
1.33 deraadt 159: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 160:
161: return(status);
162: }
163:
1.17 itojun 164: static char *
1.1 djm 165: get_handle(int fd, u_int expected_id, u_int *len)
166: {
167: Buffer msg;
168: u_int type, id;
169: char *handle;
170:
171: buffer_init(&msg);
172: get_msg(fd, &msg);
173: type = buffer_get_char(&msg);
174: id = buffer_get_int(&msg);
175:
176: if (id != expected_id)
1.33 deraadt 177: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 178: if (type == SSH2_FXP_STATUS) {
179: int status = buffer_get_int(&msg);
180:
181: error("Couldn't get handle: %s", fx2txt(status));
182: return(NULL);
183: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 184: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 185: SSH2_FXP_HANDLE, type);
186:
187: handle = buffer_get_string(&msg, len);
188: buffer_free(&msg);
189:
190: return(handle);
191: }
192:
1.17 itojun 193: static Attrib *
1.14 djm 194: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 195: {
196: Buffer msg;
197: u_int type, id;
198: Attrib *a;
199:
200: buffer_init(&msg);
201: get_msg(fd, &msg);
202:
203: type = buffer_get_char(&msg);
204: id = buffer_get_int(&msg);
205:
1.33 deraadt 206: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 207: if (id != expected_id)
1.33 deraadt 208: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 209: if (type == SSH2_FXP_STATUS) {
210: int status = buffer_get_int(&msg);
211:
1.14 djm 212: if (quiet)
213: debug("Couldn't stat remote file: %s", fx2txt(status));
214: else
215: error("Couldn't stat remote file: %s", fx2txt(status));
1.1 djm 216: return(NULL);
217: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 218: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 219: SSH2_FXP_ATTRS, type);
220: }
221: a = decode_attrib(&msg);
222: buffer_free(&msg);
223:
224: return(a);
225: }
226:
1.23 djm 227: struct sftp_conn *
228: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 229: {
1.33 deraadt 230: u_int type;
231: int version;
1.1 djm 232: Buffer msg;
1.23 djm 233: struct sftp_conn *ret;
1.1 djm 234:
235: buffer_init(&msg);
236: buffer_put_char(&msg, SSH2_FXP_INIT);
237: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
238: send_msg(fd_out, &msg);
239:
240: buffer_clear(&msg);
241:
242: get_msg(fd_in, &msg);
243:
1.3 stevesk 244: /* Expecting a VERSION reply */
1.1 djm 245: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 246: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 247: type);
248: buffer_free(&msg);
1.23 djm 249: return(NULL);
1.1 djm 250: }
251: version = buffer_get_int(&msg);
252:
253: debug2("Remote version: %d", version);
254:
255: /* Check for extensions */
256: while (buffer_len(&msg) > 0) {
257: char *name = buffer_get_string(&msg, NULL);
258: char *value = buffer_get_string(&msg, NULL);
259:
260: debug2("Init extension: \"%s\"", name);
261: xfree(name);
262: xfree(value);
263: }
264:
265: buffer_free(&msg);
1.11 djm 266:
1.23 djm 267: ret = xmalloc(sizeof(*ret));
268: ret->fd_in = fd_in;
269: ret->fd_out = fd_out;
270: ret->transfer_buflen = transfer_buflen;
271: ret->num_requests = num_requests;
272: ret->version = version;
273: ret->msg_id = 1;
274:
275: /* Some filexfer v.0 servers don't support large packets */
276: if (version == 0)
1.29 markus 277: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 278:
279: return(ret);
280: }
281:
282: u_int
283: sftp_proto_version(struct sftp_conn *conn)
284: {
285: return(conn->version);
1.1 djm 286: }
287:
288: int
1.23 djm 289: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 290: {
291: u_int id, status;
292: Buffer msg;
293:
294: buffer_init(&msg);
295:
1.23 djm 296: id = conn->msg_id++;
1.1 djm 297: buffer_put_char(&msg, SSH2_FXP_CLOSE);
298: buffer_put_int(&msg, id);
299: buffer_put_string(&msg, handle, handle_len);
1.23 djm 300: send_msg(conn->fd_out, &msg);
1.33 deraadt 301: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 302:
1.23 djm 303: status = get_status(conn->fd_in, id);
1.1 djm 304: if (status != SSH2_FX_OK)
305: error("Couldn't close file: %s", fx2txt(status));
306:
307: buffer_free(&msg);
308:
309: return(status);
310: }
311:
1.12 djm 312:
1.17 itojun 313: static int
1.23 djm 314: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 315: SFTP_DIRENT ***dir)
1.1 djm 316: {
317: Buffer msg;
1.13 markus 318: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 319: char *handle;
320:
1.23 djm 321: id = conn->msg_id++;
1.1 djm 322:
323: buffer_init(&msg);
324: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
325: buffer_put_int(&msg, id);
326: buffer_put_cstring(&msg, path);
1.23 djm 327: send_msg(conn->fd_out, &msg);
1.1 djm 328:
329: buffer_clear(&msg);
330:
1.23 djm 331: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 332: if (handle == NULL)
333: return(-1);
334:
1.12 djm 335: if (dir) {
336: ents = 0;
337: *dir = xmalloc(sizeof(**dir));
338: (*dir)[0] = NULL;
339: }
340:
1.19 deraadt 341: for (;;) {
1.1 djm 342: int count;
343:
1.23 djm 344: id = expected_id = conn->msg_id++;
1.1 djm 345:
1.33 deraadt 346: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 347:
348: buffer_clear(&msg);
349: buffer_put_char(&msg, SSH2_FXP_READDIR);
350: buffer_put_int(&msg, id);
351: buffer_put_string(&msg, handle, handle_len);
1.23 djm 352: send_msg(conn->fd_out, &msg);
1.1 djm 353:
354: buffer_clear(&msg);
355:
1.23 djm 356: get_msg(conn->fd_in, &msg);
1.1 djm 357:
358: type = buffer_get_char(&msg);
359: id = buffer_get_int(&msg);
360:
1.33 deraadt 361: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 362:
363: if (id != expected_id)
1.33 deraadt 364: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 365:
366: if (type == SSH2_FXP_STATUS) {
367: int status = buffer_get_int(&msg);
368:
369: debug3("Received SSH2_FXP_STATUS %d", status);
370:
371: if (status == SSH2_FX_EOF) {
372: break;
373: } else {
374: error("Couldn't read directory: %s",
375: fx2txt(status));
1.23 djm 376: do_close(conn, handle, handle_len);
1.35.2.1 margarid 377: xfree(handle);
1.9 djm 378: return(status);
1.1 djm 379: }
380: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 381: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 382: SSH2_FXP_NAME, type);
383:
384: count = buffer_get_int(&msg);
1.7 markus 385: if (count == 0)
386: break;
1.8 stevesk 387: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 388: for (i = 0; i < count; i++) {
1.1 djm 389: char *filename, *longname;
390: Attrib *a;
391:
392: filename = buffer_get_string(&msg, NULL);
393: longname = buffer_get_string(&msg, NULL);
394: a = decode_attrib(&msg);
395:
1.12 djm 396: if (printflag)
397: printf("%s\n", longname);
398:
399: if (dir) {
1.16 markus 400: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 401: (ents + 2));
402: (*dir)[ents] = xmalloc(sizeof(***dir));
403: (*dir)[ents]->filename = xstrdup(filename);
404: (*dir)[ents]->longname = xstrdup(longname);
405: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
406: (*dir)[++ents] = NULL;
407: }
1.1 djm 408:
409: xfree(filename);
410: xfree(longname);
411: }
412: }
413:
414: buffer_free(&msg);
1.23 djm 415: do_close(conn, handle, handle_len);
1.1 djm 416: xfree(handle);
417:
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
1.35.2.2! brad 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:
654: /* Send rename 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)
1.35.2.1 margarid 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;
1.21 djm 744: int local_fd, status, num_req, max_req, write_error;
745: int read_error, write_errno;
746: u_int64_t offset, size;
1.23 djm 747: u_int handle_len, mode, type, id, buflen;
1.35.2.1 margarid 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)
1.35.2.1 margarid 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) &&
1.35.2.1 margarid 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:
1.35.2.1 margarid 801: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
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;
1.35.2.1 margarid 814: progress_counter = 0;
815:
816: if (showprogress) {
817: if (size)
818: start_progress_meter(remote_path, size,
819: &progress_counter);
820: else
821: printf("Fetching %s to %s\n", remote_path, local_path);
822: }
823:
1.21 djm 824: while (num_req > 0 || max_req > 0) {
825: char *data;
1.1 djm 826: u_int len;
827:
1.21 djm 828: /* Send some more requests */
829: while (num_req < max_req) {
1.28 markus 830: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 831: (unsigned long long)offset,
832: (unsigned long long)offset + buflen - 1,
833: num_req, max_req);
1.21 djm 834: req = xmalloc(sizeof(*req));
1.23 djm 835: req->id = conn->msg_id++;
1.21 djm 836: req->len = buflen;
837: req->offset = offset;
838: offset += buflen;
839: num_req++;
840: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 841: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 842: req->len, handle, handle_len);
843: }
1.1 djm 844:
845: buffer_clear(&msg);
1.23 djm 846: get_msg(conn->fd_in, &msg);
1.1 djm 847: type = buffer_get_char(&msg);
848: id = buffer_get_int(&msg);
1.33 deraadt 849: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 850:
851: /* Find the request in our queue */
852: for(req = TAILQ_FIRST(&requests);
853: req != NULL && req->id != id;
854: req = TAILQ_NEXT(req, tq))
855: ;
856: if (req == NULL)
857: fatal("Unexpected reply %u", id);
858:
859: switch (type) {
860: case SSH2_FXP_STATUS:
1.5 djm 861: status = buffer_get_int(&msg);
1.21 djm 862: if (status != SSH2_FX_EOF)
863: read_error = 1;
864: max_req = 0;
865: TAILQ_REMOVE(&requests, req, tq);
866: xfree(req);
867: num_req--;
868: break;
869: case SSH2_FXP_DATA:
870: data = buffer_get_string(&msg, &len);
1.26 itojun 871: debug3("Received data %llu -> %llu",
1.28 markus 872: (unsigned long long)req->offset,
1.26 itojun 873: (unsigned long long)req->offset + len - 1);
1.21 djm 874: if (len > req->len)
875: fatal("Received more data than asked for "
1.35.2.1 margarid 876: "%u > %u", len, req->len);
1.21 djm 877: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.35.2.2! brad 878: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 879: !write_error) {
880: write_errno = errno;
881: write_error = 1;
882: max_req = 0;
883: }
1.35.2.1 margarid 884: progress_counter += len;
1.21 djm 885: xfree(data);
1.1 djm 886:
1.21 djm 887: if (len == req->len) {
888: TAILQ_REMOVE(&requests, req, tq);
889: xfree(req);
890: num_req--;
891: } else {
892: /* Resend the request for the missing data */
893: debug3("Short data block, re-requesting "
1.26 itojun 894: "%llu -> %llu (%2d)",
1.28 markus 895: (unsigned long long)req->offset + len,
1.27 itojun 896: (unsigned long long)req->offset +
897: req->len - 1, num_req);
1.23 djm 898: req->id = conn->msg_id++;
1.21 djm 899: req->len -= len;
900: req->offset += len;
1.28 markus 901: send_read_request(conn->fd_out, req->id,
1.23 djm 902: req->offset, req->len, handle, handle_len);
1.21 djm 903: /* Reduce the request size */
904: if (len < buflen)
905: buflen = MAX(MIN_READ_SIZE, len);
906: }
907: if (max_req > 0) { /* max_req = 0 iff EOF received */
908: if (size > 0 && offset > size) {
909: /* Only one request at a time
910: * after the expected EOF */
911: debug3("Finish at %llu (%2d)",
1.26 itojun 912: (unsigned long long)offset,
913: num_req);
1.21 djm 914: max_req = 1;
915: }
1.23 djm 916: else if (max_req < conn->num_requests + 1) {
1.21 djm 917: ++max_req;
918: }
1.1 djm 919: }
1.21 djm 920: break;
921: default:
1.33 deraadt 922: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 923: SSH2_FXP_DATA, type);
924: }
1.21 djm 925: }
1.1 djm 926:
1.35.2.1 margarid 927: if (showprogress && size)
928: stop_progress_meter();
929:
1.21 djm 930: /* Sanity check */
931: if (TAILQ_FIRST(&requests) != NULL)
932: fatal("Transfer complete, but requests still in queue");
933:
934: if (read_error) {
1.28 markus 935: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 936: remote_path, fx2txt(status));
1.23 djm 937: do_close(conn, handle, handle_len);
1.21 djm 938: } else if (write_error) {
939: error("Couldn't write to \"%s\": %s", local_path,
940: strerror(write_errno));
941: status = -1;
1.23 djm 942: do_close(conn, handle, handle_len);
1.21 djm 943: } else {
1.23 djm 944: status = do_close(conn, handle, handle_len);
1.21 djm 945:
946: /* Override umask and utimes if asked */
947: if (pflag && fchmod(local_fd, mode) == -1)
948: error("Couldn't set mode on \"%s\": %s", local_path,
1.35.2.1 margarid 949: strerror(errno));
1.21 djm 950: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
951: struct timeval tv[2];
952: tv[0].tv_sec = a->atime;
953: tv[1].tv_sec = a->mtime;
954: tv[0].tv_usec = tv[1].tv_usec = 0;
955: if (utimes(local_path, tv) == -1)
956: error("Can't set times on \"%s\": %s",
1.35.2.1 margarid 957: local_path, strerror(errno));
1.1 djm 958: }
1.10 djm 959: }
1.5 djm 960: close(local_fd);
961: buffer_free(&msg);
1.1 djm 962: xfree(handle);
1.23 djm 963:
964: return(status);
1.1 djm 965: }
966:
967: int
1.23 djm 968: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
969: int pflag)
1.1 djm 970: {
1.20 djm 971: int local_fd, status;
1.22 djm 972: u_int handle_len, id, type;
1.1 djm 973: u_int64_t offset;
1.20 djm 974: char *handle, *data;
1.1 djm 975: Buffer msg;
976: struct stat sb;
977: Attrib a;
1.21 djm 978: u_int32_t startid;
979: u_int32_t ackid;
1.22 djm 980: struct outstanding_ack {
981: u_int id;
982: u_int len;
983: u_int64_t offset;
1.28 markus 984: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 985: };
986: TAILQ_HEAD(ackhead, outstanding_ack) acks;
987: struct outstanding_ack *ack;
988:
989: TAILQ_INIT(&acks);
1.1 djm 990:
991: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
992: error("Couldn't open local file \"%s\" for reading: %s",
993: local_path, strerror(errno));
994: return(-1);
995: }
996: if (fstat(local_fd, &sb) == -1) {
997: error("Couldn't fstat local file \"%s\": %s",
998: local_path, strerror(errno));
999: close(local_fd);
1000: return(-1);
1001: }
1.35.2.1 margarid 1002: if (!S_ISREG(sb.st_mode)) {
1003: error("%s is not a regular file", local_path);
1004: close(local_fd);
1005: return(-1);
1006: }
1.1 djm 1007: stat_to_attrib(&sb, &a);
1008:
1009: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1010: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1011: a.perm &= 0777;
1012: if (!pflag)
1013: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1014:
1015: buffer_init(&msg);
1016:
1017: /* Send open request */
1.23 djm 1018: id = conn->msg_id++;
1.1 djm 1019: buffer_put_char(&msg, SSH2_FXP_OPEN);
1020: buffer_put_int(&msg, id);
1021: buffer_put_cstring(&msg, remote_path);
1022: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1023: encode_attrib(&msg, &a);
1.23 djm 1024: send_msg(conn->fd_out, &msg);
1.33 deraadt 1025: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1026:
1027: buffer_clear(&msg);
1028:
1.23 djm 1029: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1030: if (handle == NULL) {
1031: close(local_fd);
1032: buffer_free(&msg);
1033: return(-1);
1034: }
1035:
1.21 djm 1036: startid = ackid = id + 1;
1.23 djm 1037: data = xmalloc(conn->transfer_buflen);
1.20 djm 1038:
1.1 djm 1039: /* Read from local and write to remote */
1040: offset = 0;
1.35.2.1 margarid 1041: if (showprogress)
1042: start_progress_meter(local_path, sb.st_size, &offset);
1043: else
1044: printf("Uploading %s to %s\n", local_path, remote_path);
1045:
1.19 deraadt 1046: for (;;) {
1.1 djm 1047: int len;
1048:
1049: /*
1050: * Can't use atomicio here because it returns 0 on EOF, thus losing
1051: * the last block of the file
1052: */
1053: do
1.23 djm 1054: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1055: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1056:
1057: if (len == -1)
1058: fatal("Couldn't read from \"%s\": %s", local_path,
1059: strerror(errno));
1.21 djm 1060:
1061: if (len != 0) {
1.22 djm 1062: ack = xmalloc(sizeof(*ack));
1063: ack->id = ++id;
1064: ack->offset = offset;
1065: ack->len = len;
1066: TAILQ_INSERT_TAIL(&acks, ack, tq);
1067:
1.21 djm 1068: buffer_clear(&msg);
1069: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1070: buffer_put_int(&msg, ack->id);
1.21 djm 1071: buffer_put_string(&msg, handle, handle_len);
1072: buffer_put_int64(&msg, offset);
1073: buffer_put_string(&msg, data, len);
1.23 djm 1074: send_msg(conn->fd_out, &msg);
1.33 deraadt 1075: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.35.2.1 margarid 1076: id, (unsigned long long)offset, len);
1.22 djm 1077: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1078: break;
1079:
1.22 djm 1080: if (ack == NULL)
1081: fatal("Unexpected ACK %u", id);
1082:
1.28 markus 1083: if (id == startid || len == 0 ||
1.23 djm 1084: id - ackid >= conn->num_requests) {
1.32 markus 1085: u_int r_id;
1.31 djm 1086:
1.22 djm 1087: buffer_clear(&msg);
1.23 djm 1088: get_msg(conn->fd_in, &msg);
1.22 djm 1089: type = buffer_get_char(&msg);
1.31 djm 1090: r_id = buffer_get_int(&msg);
1.22 djm 1091:
1092: if (type != SSH2_FXP_STATUS)
1093: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1094: "got %d", SSH2_FXP_STATUS, type);
1095:
1096: status = buffer_get_int(&msg);
1097: debug3("SSH2_FXP_STATUS %d", status);
1098:
1099: /* Find the request in our queue */
1100: for(ack = TAILQ_FIRST(&acks);
1.31 djm 1101: ack != NULL && ack->id != r_id;
1.22 djm 1102: ack = TAILQ_NEXT(ack, tq))
1103: ;
1104: if (ack == NULL)
1.33 deraadt 1105: fatal("Can't find request for ID %u", r_id);
1.22 djm 1106: TAILQ_REMOVE(&acks, ack, tq);
1107:
1.21 djm 1108: if (status != SSH2_FX_OK) {
1109: error("Couldn't write to remote file \"%s\": %s",
1.35.2.1 margarid 1110: remote_path, fx2txt(status));
1.23 djm 1111: do_close(conn, handle, handle_len);
1.21 djm 1112: close(local_fd);
1.35.2.1 margarid 1113: xfree(data);
1114: xfree(ack);
1.21 djm 1115: goto done;
1116: }
1.33 deraadt 1117: debug3("In write loop, ack for %u %u bytes at %llu",
1.26 itojun 1118: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1119: ++ackid;
1.34 deraadt 1120: xfree(ack);
1.1 djm 1121: }
1122: offset += len;
1123: }
1.35.2.1 margarid 1124: if (showprogress)
1125: stop_progress_meter();
1.20 djm 1126: xfree(data);
1.1 djm 1127:
1128: if (close(local_fd) == -1) {
1129: error("Couldn't close local file \"%s\": %s", local_path,
1130: strerror(errno));
1.23 djm 1131: do_close(conn, handle, handle_len);
1.5 djm 1132: status = -1;
1133: goto done;
1.1 djm 1134: }
1135:
1.10 djm 1136: /* Override umask and utimes if asked */
1137: if (pflag)
1.23 djm 1138: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1139:
1.23 djm 1140: status = do_close(conn, handle, handle_len);
1.5 djm 1141:
1142: done:
1143: xfree(handle);
1144: buffer_free(&msg);
1.23 djm 1145: return(status);
1.1 djm 1146: }
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