Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.58
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"
1.58 ! djm 23: RCSID("$OpenBSD: sftp-client.c,v 1.57 2005/07/27 10:39:03 dtucker Exp $");
1.21 djm 24:
25: #include <sys/queue.h>
1.1 djm 26:
27: #include "buffer.h"
28: #include "bufaux.h"
29: #include "getput.h"
30: #include "xmalloc.h"
31: #include "log.h"
32: #include "atomicio.h"
1.39 fgsch 33: #include "progressmeter.h"
1.1 djm 34:
35: #include "sftp.h"
36: #include "sftp-common.h"
37: #include "sftp-client.h"
38:
1.49 djm 39: extern volatile sig_atomic_t interrupted;
1.39 fgsch 40: extern int showprogress;
41:
1.21 djm 42: /* Minimum amount of data to read at at time */
43: #define MIN_READ_SIZE 512
44:
1.23 djm 45: struct sftp_conn {
46: int fd_in;
47: int fd_out;
48: u_int transfer_buflen;
49: u_int num_requests;
50: u_int version;
51: u_int msg_id;
52: };
1.4 djm 53:
1.17 itojun 54: static void
1.1 djm 55: send_msg(int fd, Buffer *m)
56: {
1.40 djm 57: u_char mlen[4];
58:
1.58 ! djm 59: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 60: fatal("Outbound message too long %u", buffer_len(m));
61:
62: /* Send length first */
63: PUT_32BIT(mlen, buffer_len(m));
1.54 avsm 64: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) != sizeof(mlen))
1.40 djm 65: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 66:
1.54 avsm 67: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) != buffer_len(m))
1.1 djm 68: fatal("Couldn't send packet: %s", strerror(errno));
69:
1.40 djm 70: buffer_clear(m);
1.1 djm 71: }
72:
1.17 itojun 73: static void
1.1 djm 74: get_msg(int fd, Buffer *m)
75: {
1.40 djm 76: u_int msg_len;
1.1 djm 77:
1.40 djm 78: buffer_append_space(m, 4);
1.54 avsm 79: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
80: if (errno == EPIPE)
81: fatal("Connection closed");
82: else
83: fatal("Couldn't read packet: %s", strerror(errno));
84: }
1.1 djm 85:
1.40 djm 86: msg_len = buffer_get_int(m);
1.58 ! djm 87: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 88: fatal("Received message too long %u", msg_len);
1.1 djm 89:
1.40 djm 90: buffer_append_space(m, msg_len);
1.54 avsm 91: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
92: if (errno == EPIPE)
93: fatal("Connection closed");
94: else
95: fatal("Read packet: %s", strerror(errno));
96: }
1.1 djm 97: }
98:
1.17 itojun 99: static void
1.1 djm 100: send_string_request(int fd, u_int id, u_int code, char *s,
101: u_int len)
102: {
103: Buffer msg;
104:
105: buffer_init(&msg);
106: buffer_put_char(&msg, code);
107: buffer_put_int(&msg, id);
108: buffer_put_string(&msg, s, len);
109: send_msg(fd, &msg);
1.33 deraadt 110: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 111: buffer_free(&msg);
112: }
113:
1.17 itojun 114: static void
1.1 djm 115: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
116: u_int len, Attrib *a)
117: {
118: Buffer msg;
119:
120: buffer_init(&msg);
121: buffer_put_char(&msg, code);
122: buffer_put_int(&msg, id);
123: buffer_put_string(&msg, s, len);
124: encode_attrib(&msg, a);
125: send_msg(fd, &msg);
1.33 deraadt 126: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 127: buffer_free(&msg);
128: }
129:
1.17 itojun 130: static u_int
1.33 deraadt 131: get_status(int fd, u_int expected_id)
1.1 djm 132: {
133: Buffer msg;
134: u_int type, id, status;
135:
136: buffer_init(&msg);
137: get_msg(fd, &msg);
138: type = buffer_get_char(&msg);
139: id = buffer_get_int(&msg);
140:
141: if (id != expected_id)
1.33 deraadt 142: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 143: if (type != SSH2_FXP_STATUS)
1.33 deraadt 144: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 145: SSH2_FXP_STATUS, type);
146:
147: status = buffer_get_int(&msg);
148: buffer_free(&msg);
149:
1.33 deraadt 150: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 151:
152: return(status);
153: }
154:
1.17 itojun 155: static char *
1.1 djm 156: get_handle(int fd, u_int expected_id, u_int *len)
157: {
158: Buffer msg;
159: u_int type, id;
160: char *handle;
161:
162: buffer_init(&msg);
163: get_msg(fd, &msg);
164: type = buffer_get_char(&msg);
165: id = buffer_get_int(&msg);
166:
167: if (id != expected_id)
1.33 deraadt 168: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 169: if (type == SSH2_FXP_STATUS) {
170: int status = buffer_get_int(&msg);
171:
172: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 173: buffer_free(&msg);
1.1 djm 174: return(NULL);
175: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 176: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 177: SSH2_FXP_HANDLE, type);
178:
179: handle = buffer_get_string(&msg, len);
180: buffer_free(&msg);
181:
182: return(handle);
183: }
184:
1.17 itojun 185: static Attrib *
1.14 djm 186: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 187: {
188: Buffer msg;
189: u_int type, id;
190: Attrib *a;
191:
192: buffer_init(&msg);
193: get_msg(fd, &msg);
194:
195: type = buffer_get_char(&msg);
196: id = buffer_get_int(&msg);
197:
1.33 deraadt 198: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 199: if (id != expected_id)
1.33 deraadt 200: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 201: if (type == SSH2_FXP_STATUS) {
202: int status = buffer_get_int(&msg);
203:
1.14 djm 204: if (quiet)
205: debug("Couldn't stat remote file: %s", fx2txt(status));
206: else
207: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 208: buffer_free(&msg);
1.1 djm 209: return(NULL);
210: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 211: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 212: SSH2_FXP_ATTRS, type);
213: }
214: a = decode_attrib(&msg);
215: buffer_free(&msg);
216:
217: return(a);
218: }
219:
1.23 djm 220: struct sftp_conn *
221: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 222: {
1.33 deraadt 223: u_int type;
224: int version;
1.1 djm 225: Buffer msg;
1.23 djm 226: struct sftp_conn *ret;
1.1 djm 227:
228: buffer_init(&msg);
229: buffer_put_char(&msg, SSH2_FXP_INIT);
230: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
231: send_msg(fd_out, &msg);
232:
233: buffer_clear(&msg);
234:
235: get_msg(fd_in, &msg);
236:
1.3 stevesk 237: /* Expecting a VERSION reply */
1.1 djm 238: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 239: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 240: type);
241: buffer_free(&msg);
1.23 djm 242: return(NULL);
1.1 djm 243: }
244: version = buffer_get_int(&msg);
245:
246: debug2("Remote version: %d", version);
247:
248: /* Check for extensions */
249: while (buffer_len(&msg) > 0) {
250: char *name = buffer_get_string(&msg, NULL);
251: char *value = buffer_get_string(&msg, NULL);
252:
253: debug2("Init extension: \"%s\"", name);
254: xfree(name);
255: xfree(value);
256: }
257:
258: buffer_free(&msg);
1.11 djm 259:
1.23 djm 260: ret = xmalloc(sizeof(*ret));
261: ret->fd_in = fd_in;
262: ret->fd_out = fd_out;
263: ret->transfer_buflen = transfer_buflen;
264: ret->num_requests = num_requests;
265: ret->version = version;
266: ret->msg_id = 1;
267:
268: /* Some filexfer v.0 servers don't support large packets */
269: if (version == 0)
1.29 markus 270: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 271:
272: return(ret);
273: }
274:
275: u_int
276: sftp_proto_version(struct sftp_conn *conn)
277: {
278: return(conn->version);
1.1 djm 279: }
280:
281: int
1.23 djm 282: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 283: {
284: u_int id, status;
285: Buffer msg;
286:
287: buffer_init(&msg);
288:
1.23 djm 289: id = conn->msg_id++;
1.1 djm 290: buffer_put_char(&msg, SSH2_FXP_CLOSE);
291: buffer_put_int(&msg, id);
292: buffer_put_string(&msg, handle, handle_len);
1.23 djm 293: send_msg(conn->fd_out, &msg);
1.33 deraadt 294: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 295:
1.23 djm 296: status = get_status(conn->fd_in, id);
1.1 djm 297: if (status != SSH2_FX_OK)
298: error("Couldn't close file: %s", fx2txt(status));
299:
300: buffer_free(&msg);
301:
302: return(status);
303: }
304:
1.12 djm 305:
1.17 itojun 306: static int
1.23 djm 307: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 308: SFTP_DIRENT ***dir)
1.1 djm 309: {
310: Buffer msg;
1.55 djm 311: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 312: char *handle;
313:
1.23 djm 314: id = conn->msg_id++;
1.1 djm 315:
316: buffer_init(&msg);
317: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
318: buffer_put_int(&msg, id);
319: buffer_put_cstring(&msg, path);
1.23 djm 320: send_msg(conn->fd_out, &msg);
1.1 djm 321:
322: buffer_clear(&msg);
323:
1.23 djm 324: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 325: if (handle == NULL)
326: return(-1);
327:
1.12 djm 328: if (dir) {
329: ents = 0;
330: *dir = xmalloc(sizeof(**dir));
331: (*dir)[0] = NULL;
332: }
333:
1.49 djm 334: for (; !interrupted;) {
1.23 djm 335: id = expected_id = conn->msg_id++;
1.1 djm 336:
1.33 deraadt 337: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 338:
339: buffer_clear(&msg);
340: buffer_put_char(&msg, SSH2_FXP_READDIR);
341: buffer_put_int(&msg, id);
342: buffer_put_string(&msg, handle, handle_len);
1.23 djm 343: send_msg(conn->fd_out, &msg);
1.1 djm 344:
345: buffer_clear(&msg);
346:
1.23 djm 347: get_msg(conn->fd_in, &msg);
1.1 djm 348:
349: type = buffer_get_char(&msg);
350: id = buffer_get_int(&msg);
351:
1.33 deraadt 352: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 353:
354: if (id != expected_id)
1.33 deraadt 355: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 356:
357: if (type == SSH2_FXP_STATUS) {
358: int status = buffer_get_int(&msg);
359:
360: debug3("Received SSH2_FXP_STATUS %d", status);
361:
362: if (status == SSH2_FX_EOF) {
363: break;
364: } else {
365: error("Couldn't read directory: %s",
366: fx2txt(status));
1.23 djm 367: do_close(conn, handle, handle_len);
1.42 markus 368: xfree(handle);
1.9 djm 369: return(status);
1.1 djm 370: }
371: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 372: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 373: SSH2_FXP_NAME, type);
374:
375: count = buffer_get_int(&msg);
1.7 markus 376: if (count == 0)
377: break;
1.8 stevesk 378: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 379: for (i = 0; i < count; i++) {
1.1 djm 380: char *filename, *longname;
381: Attrib *a;
382:
383: filename = buffer_get_string(&msg, NULL);
384: longname = buffer_get_string(&msg, NULL);
385: a = decode_attrib(&msg);
386:
1.12 djm 387: if (printflag)
388: printf("%s\n", longname);
389:
390: if (dir) {
1.16 markus 391: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 392: (ents + 2));
393: (*dir)[ents] = xmalloc(sizeof(***dir));
394: (*dir)[ents]->filename = xstrdup(filename);
395: (*dir)[ents]->longname = xstrdup(longname);
396: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
397: (*dir)[++ents] = NULL;
398: }
1.1 djm 399:
400: xfree(filename);
401: xfree(longname);
402: }
403: }
404:
405: buffer_free(&msg);
1.23 djm 406: do_close(conn, handle, handle_len);
1.1 djm 407: xfree(handle);
408:
1.49 djm 409: /* Don't return partial matches on interrupt */
410: if (interrupted && dir != NULL && *dir != NULL) {
411: free_sftp_dirents(*dir);
412: *dir = xmalloc(sizeof(**dir));
413: **dir = NULL;
414: }
415:
1.1 djm 416: return(0);
1.12 djm 417: }
418:
419: int
1.23 djm 420: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 421: {
1.23 djm 422: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 423: }
424:
425: void free_sftp_dirents(SFTP_DIRENT **s)
426: {
427: int i;
1.19 deraadt 428:
429: for (i = 0; s[i]; i++) {
1.12 djm 430: xfree(s[i]->filename);
431: xfree(s[i]->longname);
432: xfree(s[i]);
433: }
434: xfree(s);
435: }
436:
437: int
1.23 djm 438: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 439: {
440: u_int status, id;
441:
442: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
443:
1.23 djm 444: id = conn->msg_id++;
1.28 markus 445: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 446: strlen(path));
447: status = get_status(conn->fd_in, id);
1.1 djm 448: if (status != SSH2_FX_OK)
449: error("Couldn't delete file: %s", fx2txt(status));
450: return(status);
451: }
452:
453: int
1.23 djm 454: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 455: {
456: u_int status, id;
457:
1.23 djm 458: id = conn->msg_id++;
459: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 460: strlen(path), a);
461:
1.23 djm 462: status = get_status(conn->fd_in, id);
1.1 djm 463: if (status != SSH2_FX_OK)
464: error("Couldn't create directory: %s", fx2txt(status));
465:
466: return(status);
467: }
468:
469: int
1.23 djm 470: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 471: {
472: u_int status, id;
473:
1.23 djm 474: id = conn->msg_id++;
475: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
476: strlen(path));
1.1 djm 477:
1.23 djm 478: status = get_status(conn->fd_in, id);
1.1 djm 479: if (status != SSH2_FX_OK)
480: error("Couldn't remove directory: %s", fx2txt(status));
481:
482: return(status);
483: }
484:
485: Attrib *
1.23 djm 486: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 487: {
488: u_int id;
489:
1.23 djm 490: id = conn->msg_id++;
491:
1.28 markus 492: send_string_request(conn->fd_out, id,
493: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 494: path, strlen(path));
495:
496: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 497: }
498:
499: Attrib *
1.23 djm 500: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 501: {
502: u_int id;
503:
1.23 djm 504: if (conn->version == 0) {
505: if (quiet)
506: debug("Server version does not support lstat operation");
507: else
1.43 itojun 508: logit("Server version does not support lstat operation");
1.30 markus 509: return(do_stat(conn, path, quiet));
1.23 djm 510: }
511:
512: id = conn->msg_id++;
513: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
514: strlen(path));
515:
516: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 517: }
518:
519: Attrib *
1.23 djm 520: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 521: {
522: u_int id;
523:
1.23 djm 524: id = conn->msg_id++;
525: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
526: handle_len);
527:
528: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 529: }
530:
531: int
1.23 djm 532: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 533: {
534: u_int status, id;
535:
1.23 djm 536: id = conn->msg_id++;
537: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 538: strlen(path), a);
539:
1.23 djm 540: status = get_status(conn->fd_in, id);
1.1 djm 541: if (status != SSH2_FX_OK)
542: error("Couldn't setstat on \"%s\": %s", path,
543: fx2txt(status));
544:
545: return(status);
546: }
547:
548: int
1.23 djm 549: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 550: Attrib *a)
551: {
552: u_int status, id;
553:
1.23 djm 554: id = conn->msg_id++;
555: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 556: handle_len, a);
557:
1.23 djm 558: status = get_status(conn->fd_in, id);
1.1 djm 559: if (status != SSH2_FX_OK)
560: error("Couldn't fsetstat: %s", fx2txt(status));
561:
562: return(status);
563: }
564:
565: char *
1.23 djm 566: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 567: {
568: Buffer msg;
569: u_int type, expected_id, count, id;
570: char *filename, *longname;
571: Attrib *a;
572:
1.23 djm 573: expected_id = id = conn->msg_id++;
574: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
575: strlen(path));
1.1 djm 576:
577: buffer_init(&msg);
578:
1.23 djm 579: get_msg(conn->fd_in, &msg);
1.1 djm 580: type = buffer_get_char(&msg);
581: id = buffer_get_int(&msg);
582:
583: if (id != expected_id)
1.33 deraadt 584: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 585:
586: if (type == SSH2_FXP_STATUS) {
587: u_int status = buffer_get_int(&msg);
588:
589: error("Couldn't canonicalise: %s", fx2txt(status));
590: return(NULL);
591: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 592: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 593: SSH2_FXP_NAME, type);
594:
595: count = buffer_get_int(&msg);
596: if (count != 1)
597: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
598:
599: filename = buffer_get_string(&msg, NULL);
600: longname = buffer_get_string(&msg, NULL);
601: a = decode_attrib(&msg);
602:
603: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
604:
605: xfree(longname);
606:
607: buffer_free(&msg);
608:
609: return(filename);
610: }
611:
612: int
1.23 djm 613: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 614: {
615: Buffer msg;
616: u_int status, id;
617:
618: buffer_init(&msg);
619:
620: /* Send rename request */
1.23 djm 621: id = conn->msg_id++;
1.1 djm 622: buffer_put_char(&msg, SSH2_FXP_RENAME);
623: buffer_put_int(&msg, id);
624: buffer_put_cstring(&msg, oldpath);
625: buffer_put_cstring(&msg, newpath);
1.23 djm 626: send_msg(conn->fd_out, &msg);
1.1 djm 627: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
628: newpath);
629: buffer_free(&msg);
630:
1.23 djm 631: status = get_status(conn->fd_in, id);
1.1 djm 632: if (status != SSH2_FX_OK)
1.23 djm 633: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
634: newpath, fx2txt(status));
1.1 djm 635:
636: return(status);
1.11 djm 637: }
638:
639: int
1.23 djm 640: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 641: {
642: Buffer msg;
643: u_int status, id;
644:
1.23 djm 645: if (conn->version < 3) {
646: error("This server does not support the symlink operation");
647: return(SSH2_FX_OP_UNSUPPORTED);
648: }
649:
1.11 djm 650: buffer_init(&msg);
651:
1.48 djm 652: /* Send symlink request */
1.23 djm 653: id = conn->msg_id++;
1.11 djm 654: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
655: buffer_put_int(&msg, id);
656: buffer_put_cstring(&msg, oldpath);
657: buffer_put_cstring(&msg, newpath);
1.23 djm 658: send_msg(conn->fd_out, &msg);
1.11 djm 659: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
660: newpath);
661: buffer_free(&msg);
662:
1.23 djm 663: status = get_status(conn->fd_in, id);
1.11 djm 664: if (status != SSH2_FX_OK)
1.36 markus 665: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 666: newpath, fx2txt(status));
1.11 djm 667:
668: return(status);
669: }
670:
671: char *
1.23 djm 672: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 673: {
674: Buffer msg;
675: u_int type, expected_id, count, id;
676: char *filename, *longname;
677: Attrib *a;
678:
1.23 djm 679: expected_id = id = conn->msg_id++;
680: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
681: strlen(path));
1.11 djm 682:
683: buffer_init(&msg);
684:
1.23 djm 685: get_msg(conn->fd_in, &msg);
1.11 djm 686: type = buffer_get_char(&msg);
687: id = buffer_get_int(&msg);
688:
689: if (id != expected_id)
1.33 deraadt 690: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 691:
692: if (type == SSH2_FXP_STATUS) {
693: u_int status = buffer_get_int(&msg);
694:
695: error("Couldn't readlink: %s", fx2txt(status));
696: return(NULL);
697: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 698: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 699: SSH2_FXP_NAME, type);
700:
701: count = buffer_get_int(&msg);
702: if (count != 1)
703: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
704:
705: filename = buffer_get_string(&msg, NULL);
706: longname = buffer_get_string(&msg, NULL);
707: a = decode_attrib(&msg);
708:
709: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
710:
711: xfree(longname);
712:
713: buffer_free(&msg);
714:
715: return(filename);
1.1 djm 716: }
717:
1.21 djm 718: static void
719: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
720: char *handle, u_int handle_len)
721: {
722: Buffer msg;
1.28 markus 723:
1.21 djm 724: buffer_init(&msg);
725: buffer_clear(&msg);
726: buffer_put_char(&msg, SSH2_FXP_READ);
727: buffer_put_int(&msg, id);
728: buffer_put_string(&msg, handle, handle_len);
729: buffer_put_int64(&msg, offset);
730: buffer_put_int(&msg, len);
731: send_msg(fd_out, &msg);
732: buffer_free(&msg);
1.28 markus 733: }
1.21 djm 734:
1.1 djm 735: int
1.23 djm 736: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
737: int pflag)
1.1 djm 738: {
1.21 djm 739: Attrib junk, *a;
740: Buffer msg;
1.1 djm 741: char *handle;
1.57 dtucker 742: int local_fd, status = 0, write_error;
1.21 djm 743: int read_error, write_errno;
744: u_int64_t offset, size;
1.55 djm 745: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 746: off_t progress_counter;
1.21 djm 747: struct request {
748: u_int id;
749: u_int len;
750: u_int64_t offset;
1.28 markus 751: TAILQ_ENTRY(request) tq;
1.21 djm 752: };
753: TAILQ_HEAD(reqhead, request) requests;
754: struct request *req;
755:
756: TAILQ_INIT(&requests);
1.1 djm 757:
1.23 djm 758: a = do_stat(conn, remote_path, 0);
1.1 djm 759: if (a == NULL)
760: return(-1);
761:
762: /* XXX: should we preserve set[ug]id? */
763: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 764: mode = a->perm & 0777;
1.1 djm 765: else
766: mode = 0666;
767:
1.14 djm 768: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 769: (!S_ISREG(a->perm))) {
770: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 771: return(-1);
772: }
773:
1.21 djm 774: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
775: size = a->size;
776: else
777: size = 0;
778:
1.23 djm 779: buflen = conn->transfer_buflen;
1.1 djm 780: buffer_init(&msg);
781:
782: /* Send open request */
1.23 djm 783: id = conn->msg_id++;
1.1 djm 784: buffer_put_char(&msg, SSH2_FXP_OPEN);
785: buffer_put_int(&msg, id);
786: buffer_put_cstring(&msg, remote_path);
787: buffer_put_int(&msg, SSH2_FXF_READ);
788: attrib_clear(&junk); /* Send empty attributes */
789: encode_attrib(&msg, &junk);
1.23 djm 790: send_msg(conn->fd_out, &msg);
1.33 deraadt 791: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 792:
1.23 djm 793: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 794: if (handle == NULL) {
795: buffer_free(&msg);
796: return(-1);
797: }
798:
1.45 djm 799: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 800: mode | S_IWRITE);
1.23 djm 801: if (local_fd == -1) {
802: error("Couldn't open local file \"%s\" for writing: %s",
803: local_path, strerror(errno));
1.24 markus 804: buffer_free(&msg);
805: xfree(handle);
1.23 djm 806: return(-1);
807: }
808:
1.1 djm 809: /* Read from remote and write to local */
1.21 djm 810: write_error = read_error = write_errno = num_req = offset = 0;
811: max_req = 1;
1.39 fgsch 812: progress_counter = 0;
813:
1.47 djm 814: if (showprogress && size != 0)
815: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 816:
1.21 djm 817: while (num_req > 0 || max_req > 0) {
818: char *data;
1.1 djm 819: u_int len;
820:
1.49 djm 821: /*
1.51 deraadt 822: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 823: * allow outstanding requests to drain gracefully
824: */
825: if (interrupted) {
826: if (num_req == 0) /* If we haven't started yet... */
827: break;
828: max_req = 0;
829: }
830:
1.21 djm 831: /* Send some more requests */
832: while (num_req < max_req) {
1.28 markus 833: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 834: (unsigned long long)offset,
835: (unsigned long long)offset + buflen - 1,
836: num_req, max_req);
1.21 djm 837: req = xmalloc(sizeof(*req));
1.23 djm 838: req->id = conn->msg_id++;
1.21 djm 839: req->len = buflen;
840: req->offset = offset;
841: offset += buflen;
842: num_req++;
843: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 844: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 845: req->len, handle, handle_len);
846: }
1.1 djm 847:
848: buffer_clear(&msg);
1.23 djm 849: get_msg(conn->fd_in, &msg);
1.1 djm 850: type = buffer_get_char(&msg);
851: id = buffer_get_int(&msg);
1.33 deraadt 852: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 853:
854: /* Find the request in our queue */
1.53 deraadt 855: for (req = TAILQ_FIRST(&requests);
1.21 djm 856: req != NULL && req->id != id;
857: req = TAILQ_NEXT(req, tq))
858: ;
859: if (req == NULL)
860: fatal("Unexpected reply %u", id);
861:
862: switch (type) {
863: case SSH2_FXP_STATUS:
1.5 djm 864: status = buffer_get_int(&msg);
1.21 djm 865: if (status != SSH2_FX_EOF)
866: read_error = 1;
867: max_req = 0;
868: TAILQ_REMOVE(&requests, req, tq);
869: xfree(req);
870: num_req--;
871: break;
872: case SSH2_FXP_DATA:
873: data = buffer_get_string(&msg, &len);
1.26 itojun 874: debug3("Received data %llu -> %llu",
1.28 markus 875: (unsigned long long)req->offset,
1.26 itojun 876: (unsigned long long)req->offset + len - 1);
1.21 djm 877: if (len > req->len)
878: fatal("Received more data than asked for "
1.37 deraadt 879: "%u > %u", len, req->len);
1.21 djm 880: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 881: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 882: !write_error) {
883: write_errno = errno;
884: write_error = 1;
885: max_req = 0;
886: }
1.39 fgsch 887: progress_counter += len;
1.21 djm 888: xfree(data);
1.1 djm 889:
1.21 djm 890: if (len == req->len) {
891: TAILQ_REMOVE(&requests, req, tq);
892: xfree(req);
893: num_req--;
894: } else {
895: /* Resend the request for the missing data */
896: debug3("Short data block, re-requesting "
1.26 itojun 897: "%llu -> %llu (%2d)",
1.28 markus 898: (unsigned long long)req->offset + len,
1.27 itojun 899: (unsigned long long)req->offset +
900: req->len - 1, num_req);
1.23 djm 901: req->id = conn->msg_id++;
1.21 djm 902: req->len -= len;
903: req->offset += len;
1.28 markus 904: send_read_request(conn->fd_out, req->id,
1.23 djm 905: req->offset, req->len, handle, handle_len);
1.21 djm 906: /* Reduce the request size */
907: if (len < buflen)
908: buflen = MAX(MIN_READ_SIZE, len);
909: }
910: if (max_req > 0) { /* max_req = 0 iff EOF received */
911: if (size > 0 && offset > size) {
912: /* Only one request at a time
913: * after the expected EOF */
914: debug3("Finish at %llu (%2d)",
1.26 itojun 915: (unsigned long long)offset,
916: num_req);
1.21 djm 917: max_req = 1;
1.49 djm 918: } else if (max_req <= conn->num_requests) {
1.21 djm 919: ++max_req;
920: }
1.1 djm 921: }
1.21 djm 922: break;
923: default:
1.33 deraadt 924: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 925: SSH2_FXP_DATA, type);
926: }
1.21 djm 927: }
1.1 djm 928:
1.39 fgsch 929: if (showprogress && size)
930: stop_progress_meter();
931:
1.21 djm 932: /* Sanity check */
933: if (TAILQ_FIRST(&requests) != NULL)
934: fatal("Transfer complete, but requests still in queue");
935:
936: if (read_error) {
1.28 markus 937: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 938: remote_path, fx2txt(status));
1.23 djm 939: do_close(conn, handle, handle_len);
1.21 djm 940: } else if (write_error) {
941: error("Couldn't write to \"%s\": %s", local_path,
942: strerror(write_errno));
943: status = -1;
1.23 djm 944: do_close(conn, handle, handle_len);
1.21 djm 945: } else {
1.23 djm 946: status = do_close(conn, handle, handle_len);
1.21 djm 947:
948: /* Override umask and utimes if asked */
949: if (pflag && fchmod(local_fd, mode) == -1)
950: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 951: strerror(errno));
1.21 djm 952: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
953: struct timeval tv[2];
954: tv[0].tv_sec = a->atime;
955: tv[1].tv_sec = a->mtime;
956: tv[0].tv_usec = tv[1].tv_usec = 0;
957: if (utimes(local_path, tv) == -1)
958: error("Can't set times on \"%s\": %s",
1.37 deraadt 959: local_path, strerror(errno));
1.1 djm 960: }
1.10 djm 961: }
1.5 djm 962: close(local_fd);
963: buffer_free(&msg);
1.1 djm 964: xfree(handle);
1.23 djm 965:
966: return(status);
1.1 djm 967: }
968:
969: int
1.23 djm 970: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
971: int pflag)
1.1 djm 972: {
1.20 djm 973: int local_fd, status;
1.22 djm 974: u_int handle_len, id, type;
1.1 djm 975: u_int64_t offset;
1.20 djm 976: char *handle, *data;
1.1 djm 977: Buffer msg;
978: struct stat sb;
979: Attrib a;
1.21 djm 980: u_int32_t startid;
981: u_int32_t ackid;
1.22 djm 982: struct outstanding_ack {
983: u_int id;
984: u_int len;
985: u_int64_t offset;
1.28 markus 986: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 987: };
988: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 989: struct outstanding_ack *ack = NULL;
1.22 djm 990:
991: TAILQ_INIT(&acks);
1.1 djm 992:
993: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
994: error("Couldn't open local file \"%s\" for reading: %s",
995: local_path, strerror(errno));
996: return(-1);
997: }
998: if (fstat(local_fd, &sb) == -1) {
999: error("Couldn't fstat local file \"%s\": %s",
1000: local_path, strerror(errno));
1.41 djm 1001: close(local_fd);
1002: return(-1);
1003: }
1004: if (!S_ISREG(sb.st_mode)) {
1005: error("%s is not a regular file", local_path);
1.1 djm 1006: close(local_fd);
1007: return(-1);
1008: }
1009: stat_to_attrib(&sb, &a);
1010:
1011: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1012: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1013: a.perm &= 0777;
1014: if (!pflag)
1015: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1016:
1017: buffer_init(&msg);
1018:
1019: /* Send open request */
1.23 djm 1020: id = conn->msg_id++;
1.1 djm 1021: buffer_put_char(&msg, SSH2_FXP_OPEN);
1022: buffer_put_int(&msg, id);
1023: buffer_put_cstring(&msg, remote_path);
1024: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1025: encode_attrib(&msg, &a);
1.23 djm 1026: send_msg(conn->fd_out, &msg);
1.33 deraadt 1027: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1028:
1029: buffer_clear(&msg);
1030:
1.23 djm 1031: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1032: if (handle == NULL) {
1033: close(local_fd);
1034: buffer_free(&msg);
1035: return(-1);
1036: }
1037:
1.21 djm 1038: startid = ackid = id + 1;
1.23 djm 1039: data = xmalloc(conn->transfer_buflen);
1.20 djm 1040:
1.1 djm 1041: /* Read from local and write to remote */
1042: offset = 0;
1.39 fgsch 1043: if (showprogress)
1044: start_progress_meter(local_path, sb.st_size, &offset);
1045:
1.19 deraadt 1046: for (;;) {
1.1 djm 1047: int len;
1048:
1049: /*
1.51 deraadt 1050: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1051: * thus losing the last block of the file.
1.51 deraadt 1052: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1053: * server to drain.
1.1 djm 1054: */
1.49 djm 1055: if (interrupted)
1056: len = 0;
1057: else do
1.23 djm 1058: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1059: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1060:
1061: if (len == -1)
1062: fatal("Couldn't read from \"%s\": %s", local_path,
1063: strerror(errno));
1.21 djm 1064:
1065: if (len != 0) {
1.22 djm 1066: ack = xmalloc(sizeof(*ack));
1067: ack->id = ++id;
1068: ack->offset = offset;
1069: ack->len = len;
1070: TAILQ_INSERT_TAIL(&acks, ack, tq);
1071:
1.21 djm 1072: buffer_clear(&msg);
1073: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1074: buffer_put_int(&msg, ack->id);
1.21 djm 1075: buffer_put_string(&msg, handle, handle_len);
1076: buffer_put_int64(&msg, offset);
1077: buffer_put_string(&msg, data, len);
1.23 djm 1078: send_msg(conn->fd_out, &msg);
1.33 deraadt 1079: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1080: id, (unsigned long long)offset, len);
1.22 djm 1081: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1082: break;
1083:
1.22 djm 1084: if (ack == NULL)
1085: fatal("Unexpected ACK %u", id);
1086:
1.28 markus 1087: if (id == startid || len == 0 ||
1.23 djm 1088: id - ackid >= conn->num_requests) {
1.32 markus 1089: u_int r_id;
1.31 djm 1090:
1.22 djm 1091: buffer_clear(&msg);
1.23 djm 1092: get_msg(conn->fd_in, &msg);
1.22 djm 1093: type = buffer_get_char(&msg);
1.31 djm 1094: r_id = buffer_get_int(&msg);
1.22 djm 1095:
1096: if (type != SSH2_FXP_STATUS)
1097: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1098: "got %d", SSH2_FXP_STATUS, type);
1099:
1100: status = buffer_get_int(&msg);
1101: debug3("SSH2_FXP_STATUS %d", status);
1102:
1103: /* Find the request in our queue */
1.53 deraadt 1104: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1105: ack != NULL && ack->id != r_id;
1.22 djm 1106: ack = TAILQ_NEXT(ack, tq))
1107: ;
1108: if (ack == NULL)
1.33 deraadt 1109: fatal("Can't find request for ID %u", r_id);
1.22 djm 1110: TAILQ_REMOVE(&acks, ack, tq);
1111:
1.21 djm 1112: if (status != SSH2_FX_OK) {
1113: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1114: remote_path, fx2txt(status));
1.23 djm 1115: do_close(conn, handle, handle_len);
1.21 djm 1116: close(local_fd);
1.42 markus 1117: xfree(data);
1118: xfree(ack);
1.21 djm 1119: goto done;
1120: }
1.33 deraadt 1121: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1122: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1123: ++ackid;
1.34 deraadt 1124: xfree(ack);
1.1 djm 1125: }
1126: offset += len;
1127: }
1.39 fgsch 1128: if (showprogress)
1129: stop_progress_meter();
1.20 djm 1130: xfree(data);
1.1 djm 1131:
1132: if (close(local_fd) == -1) {
1133: error("Couldn't close local file \"%s\": %s", local_path,
1134: strerror(errno));
1.23 djm 1135: do_close(conn, handle, handle_len);
1.5 djm 1136: status = -1;
1137: goto done;
1.1 djm 1138: }
1139:
1.10 djm 1140: /* Override umask and utimes if asked */
1141: if (pflag)
1.23 djm 1142: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1143:
1.23 djm 1144: status = do_close(conn, handle, handle_len);
1.5 djm 1145:
1146: done:
1147: xfree(handle);
1148: buffer_free(&msg);
1.23 djm 1149: return(status);
1.1 djm 1150: }
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