Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.47.2.2
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"
1.47.2.2! brad 23: RCSID("$OpenBSD: sftp-client.c,v 1.52 2004/11/25 22:22:14 markus 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:
1.47.2.1 brad 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:
1.40 djm 45: /* Maximum packet size */
46: #define MAX_MSG_LENGTH (256 * 1024)
47:
1.23 djm 48: struct sftp_conn {
49: int fd_in;
50: int fd_out;
51: u_int transfer_buflen;
52: u_int num_requests;
53: u_int version;
54: u_int msg_id;
55: };
1.4 djm 56:
1.17 itojun 57: static void
1.1 djm 58: send_msg(int fd, Buffer *m)
59: {
1.40 djm 60: u_char mlen[4];
61:
62: if (buffer_len(m) > MAX_MSG_LENGTH)
63: fatal("Outbound message too long %u", buffer_len(m));
64:
65: /* Send length first */
66: PUT_32BIT(mlen, buffer_len(m));
1.44 deraadt 67: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) <= 0)
1.40 djm 68: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 69:
1.44 deraadt 70: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) <= 0)
1.1 djm 71: fatal("Couldn't send packet: %s", strerror(errno));
72:
1.40 djm 73: buffer_clear(m);
1.1 djm 74: }
75:
1.17 itojun 76: static void
1.1 djm 77: get_msg(int fd, Buffer *m)
78: {
1.40 djm 79: ssize_t len;
80: u_int msg_len;
1.1 djm 81:
1.40 djm 82: buffer_append_space(m, 4);
83: len = atomicio(read, fd, buffer_ptr(m), 4);
1.15 djm 84: if (len == 0)
85: fatal("Connection closed");
86: else if (len == -1)
1.1 djm 87: fatal("Couldn't read packet: %s", strerror(errno));
88:
1.40 djm 89: msg_len = buffer_get_int(m);
90: if (msg_len > MAX_MSG_LENGTH)
1.33 deraadt 91: fatal("Received message too long %u", msg_len);
1.1 djm 92:
1.40 djm 93: buffer_append_space(m, msg_len);
94: len = atomicio(read, fd, buffer_ptr(m), msg_len);
95: if (len == 0)
96: fatal("Connection closed");
97: else if (len == -1)
98: fatal("Read packet: %s", strerror(errno));
1.1 djm 99: }
100:
1.17 itojun 101: static void
1.1 djm 102: send_string_request(int fd, u_int id, u_int code, char *s,
103: u_int len)
104: {
105: Buffer msg;
106:
107: buffer_init(&msg);
108: buffer_put_char(&msg, code);
109: buffer_put_int(&msg, id);
110: buffer_put_string(&msg, s, len);
111: send_msg(fd, &msg);
1.33 deraadt 112: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 113: buffer_free(&msg);
114: }
115:
1.17 itojun 116: static void
1.1 djm 117: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
118: u_int len, Attrib *a)
119: {
120: Buffer msg;
121:
122: buffer_init(&msg);
123: buffer_put_char(&msg, code);
124: buffer_put_int(&msg, id);
125: buffer_put_string(&msg, s, len);
126: encode_attrib(&msg, a);
127: send_msg(fd, &msg);
1.33 deraadt 128: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 129: buffer_free(&msg);
130: }
131:
1.17 itojun 132: static u_int
1.33 deraadt 133: get_status(int fd, u_int expected_id)
1.1 djm 134: {
135: Buffer msg;
136: u_int type, id, status;
137:
138: buffer_init(&msg);
139: get_msg(fd, &msg);
140: type = buffer_get_char(&msg);
141: id = buffer_get_int(&msg);
142:
143: if (id != expected_id)
1.33 deraadt 144: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 145: if (type != SSH2_FXP_STATUS)
1.33 deraadt 146: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 147: SSH2_FXP_STATUS, type);
148:
149: status = buffer_get_int(&msg);
150: buffer_free(&msg);
151:
1.33 deraadt 152: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 153:
154: return(status);
155: }
156:
1.17 itojun 157: static char *
1.1 djm 158: get_handle(int fd, u_int expected_id, u_int *len)
159: {
160: Buffer msg;
161: u_int type, id;
162: char *handle;
163:
164: buffer_init(&msg);
165: get_msg(fd, &msg);
166: type = buffer_get_char(&msg);
167: id = buffer_get_int(&msg);
168:
169: if (id != expected_id)
1.33 deraadt 170: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 171: if (type == SSH2_FXP_STATUS) {
172: int status = buffer_get_int(&msg);
173:
174: error("Couldn't get handle: %s", fx2txt(status));
1.47.2.2! brad 175: buffer_free(&msg);
1.1 djm 176: return(NULL);
177: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 178: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 179: SSH2_FXP_HANDLE, type);
180:
181: handle = buffer_get_string(&msg, len);
182: buffer_free(&msg);
183:
184: return(handle);
185: }
186:
1.17 itojun 187: static Attrib *
1.14 djm 188: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 189: {
190: Buffer msg;
191: u_int type, id;
192: Attrib *a;
193:
194: buffer_init(&msg);
195: get_msg(fd, &msg);
196:
197: type = buffer_get_char(&msg);
198: id = buffer_get_int(&msg);
199:
1.33 deraadt 200: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 201: if (id != expected_id)
1.33 deraadt 202: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 203: if (type == SSH2_FXP_STATUS) {
204: int status = buffer_get_int(&msg);
205:
1.14 djm 206: if (quiet)
207: debug("Couldn't stat remote file: %s", fx2txt(status));
208: else
209: error("Couldn't stat remote file: %s", fx2txt(status));
1.47.2.2! brad 210: buffer_free(&msg);
1.1 djm 211: return(NULL);
212: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 213: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 214: SSH2_FXP_ATTRS, type);
215: }
216: a = decode_attrib(&msg);
217: buffer_free(&msg);
218:
219: return(a);
220: }
221:
1.23 djm 222: struct sftp_conn *
223: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 224: {
1.33 deraadt 225: u_int type;
226: int version;
1.1 djm 227: Buffer msg;
1.23 djm 228: struct sftp_conn *ret;
1.1 djm 229:
230: buffer_init(&msg);
231: buffer_put_char(&msg, SSH2_FXP_INIT);
232: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
233: send_msg(fd_out, &msg);
234:
235: buffer_clear(&msg);
236:
237: get_msg(fd_in, &msg);
238:
1.3 stevesk 239: /* Expecting a VERSION reply */
1.1 djm 240: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 241: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 242: type);
243: buffer_free(&msg);
1.23 djm 244: return(NULL);
1.1 djm 245: }
246: version = buffer_get_int(&msg);
247:
248: debug2("Remote version: %d", version);
249:
250: /* Check for extensions */
251: while (buffer_len(&msg) > 0) {
252: char *name = buffer_get_string(&msg, NULL);
253: char *value = buffer_get_string(&msg, NULL);
254:
255: debug2("Init extension: \"%s\"", name);
256: xfree(name);
257: xfree(value);
258: }
259:
260: buffer_free(&msg);
1.11 djm 261:
1.23 djm 262: ret = xmalloc(sizeof(*ret));
263: ret->fd_in = fd_in;
264: ret->fd_out = fd_out;
265: ret->transfer_buflen = transfer_buflen;
266: ret->num_requests = num_requests;
267: ret->version = version;
268: ret->msg_id = 1;
269:
270: /* Some filexfer v.0 servers don't support large packets */
271: if (version == 0)
1.29 markus 272: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 273:
274: return(ret);
275: }
276:
277: u_int
278: sftp_proto_version(struct sftp_conn *conn)
279: {
280: return(conn->version);
1.1 djm 281: }
282:
283: int
1.23 djm 284: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 285: {
286: u_int id, status;
287: Buffer msg;
288:
289: buffer_init(&msg);
290:
1.23 djm 291: id = conn->msg_id++;
1.1 djm 292: buffer_put_char(&msg, SSH2_FXP_CLOSE);
293: buffer_put_int(&msg, id);
294: buffer_put_string(&msg, handle, handle_len);
1.23 djm 295: send_msg(conn->fd_out, &msg);
1.33 deraadt 296: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 297:
1.23 djm 298: status = get_status(conn->fd_in, id);
1.1 djm 299: if (status != SSH2_FX_OK)
300: error("Couldn't close file: %s", fx2txt(status));
301:
302: buffer_free(&msg);
303:
304: return(status);
305: }
306:
1.12 djm 307:
1.17 itojun 308: static int
1.23 djm 309: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 310: SFTP_DIRENT ***dir)
1.1 djm 311: {
312: Buffer msg;
1.13 markus 313: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 314: char *handle;
315:
1.23 djm 316: id = conn->msg_id++;
1.1 djm 317:
318: buffer_init(&msg);
319: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
320: buffer_put_int(&msg, id);
321: buffer_put_cstring(&msg, path);
1.23 djm 322: send_msg(conn->fd_out, &msg);
1.1 djm 323:
324: buffer_clear(&msg);
325:
1.23 djm 326: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 327: if (handle == NULL)
328: return(-1);
329:
1.12 djm 330: if (dir) {
331: ents = 0;
332: *dir = xmalloc(sizeof(**dir));
333: (*dir)[0] = NULL;
334: }
335:
1.47.2.1 brad 336: for (; !interrupted;) {
1.1 djm 337: int count;
338:
1.23 djm 339: id = expected_id = conn->msg_id++;
1.1 djm 340:
1.33 deraadt 341: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 342:
343: buffer_clear(&msg);
344: buffer_put_char(&msg, SSH2_FXP_READDIR);
345: buffer_put_int(&msg, id);
346: buffer_put_string(&msg, handle, handle_len);
1.23 djm 347: send_msg(conn->fd_out, &msg);
1.1 djm 348:
349: buffer_clear(&msg);
350:
1.23 djm 351: get_msg(conn->fd_in, &msg);
1.1 djm 352:
353: type = buffer_get_char(&msg);
354: id = buffer_get_int(&msg);
355:
1.33 deraadt 356: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 357:
358: if (id != expected_id)
1.33 deraadt 359: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 360:
361: if (type == SSH2_FXP_STATUS) {
362: int status = buffer_get_int(&msg);
363:
364: debug3("Received SSH2_FXP_STATUS %d", status);
365:
366: if (status == SSH2_FX_EOF) {
367: break;
368: } else {
369: error("Couldn't read directory: %s",
370: fx2txt(status));
1.23 djm 371: do_close(conn, handle, handle_len);
1.42 markus 372: xfree(handle);
1.9 djm 373: return(status);
1.1 djm 374: }
375: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 376: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 377: SSH2_FXP_NAME, type);
378:
379: count = buffer_get_int(&msg);
1.7 markus 380: if (count == 0)
381: break;
1.8 stevesk 382: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 383: for (i = 0; i < count; i++) {
1.1 djm 384: char *filename, *longname;
385: Attrib *a;
386:
387: filename = buffer_get_string(&msg, NULL);
388: longname = buffer_get_string(&msg, NULL);
389: a = decode_attrib(&msg);
390:
1.12 djm 391: if (printflag)
392: printf("%s\n", longname);
393:
394: if (dir) {
1.16 markus 395: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 396: (ents + 2));
397: (*dir)[ents] = xmalloc(sizeof(***dir));
398: (*dir)[ents]->filename = xstrdup(filename);
399: (*dir)[ents]->longname = xstrdup(longname);
400: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
401: (*dir)[++ents] = NULL;
402: }
1.1 djm 403:
404: xfree(filename);
405: xfree(longname);
406: }
407: }
408:
409: buffer_free(&msg);
1.23 djm 410: do_close(conn, handle, handle_len);
1.1 djm 411: xfree(handle);
412:
1.47.2.1 brad 413: /* Don't return partial matches on interrupt */
414: if (interrupted && dir != NULL && *dir != NULL) {
415: free_sftp_dirents(*dir);
416: *dir = xmalloc(sizeof(**dir));
417: **dir = NULL;
418: }
419:
1.1 djm 420: return(0);
1.12 djm 421: }
422:
423: int
1.23 djm 424: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 425: {
1.23 djm 426: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 427: }
428:
429: void free_sftp_dirents(SFTP_DIRENT **s)
430: {
431: int i;
1.19 deraadt 432:
433: for (i = 0; s[i]; i++) {
1.12 djm 434: xfree(s[i]->filename);
435: xfree(s[i]->longname);
436: xfree(s[i]);
437: }
438: xfree(s);
439: }
440:
441: int
1.23 djm 442: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 443: {
444: u_int status, id;
445:
446: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
447:
1.23 djm 448: id = conn->msg_id++;
1.28 markus 449: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 450: strlen(path));
451: status = get_status(conn->fd_in, id);
1.1 djm 452: if (status != SSH2_FX_OK)
453: error("Couldn't delete file: %s", fx2txt(status));
454: return(status);
455: }
456:
457: int
1.23 djm 458: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 459: {
460: u_int status, id;
461:
1.23 djm 462: id = conn->msg_id++;
463: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 464: strlen(path), a);
465:
1.23 djm 466: status = get_status(conn->fd_in, id);
1.1 djm 467: if (status != SSH2_FX_OK)
468: error("Couldn't create directory: %s", fx2txt(status));
469:
470: return(status);
471: }
472:
473: int
1.23 djm 474: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 475: {
476: u_int status, id;
477:
1.23 djm 478: id = conn->msg_id++;
479: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
480: strlen(path));
1.1 djm 481:
1.23 djm 482: status = get_status(conn->fd_in, id);
1.1 djm 483: if (status != SSH2_FX_OK)
484: error("Couldn't remove directory: %s", fx2txt(status));
485:
486: return(status);
487: }
488:
489: Attrib *
1.23 djm 490: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 491: {
492: u_int id;
493:
1.23 djm 494: id = conn->msg_id++;
495:
1.28 markus 496: send_string_request(conn->fd_out, id,
497: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 498: path, strlen(path));
499:
500: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 501: }
502:
503: Attrib *
1.23 djm 504: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 505: {
506: u_int id;
507:
1.23 djm 508: if (conn->version == 0) {
509: if (quiet)
510: debug("Server version does not support lstat operation");
511: else
1.43 itojun 512: logit("Server version does not support lstat operation");
1.30 markus 513: return(do_stat(conn, path, quiet));
1.23 djm 514: }
515:
516: id = conn->msg_id++;
517: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
518: strlen(path));
519:
520: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 521: }
522:
523: Attrib *
1.23 djm 524: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 525: {
526: u_int id;
527:
1.23 djm 528: id = conn->msg_id++;
529: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
530: handle_len);
531:
532: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 533: }
534:
535: int
1.23 djm 536: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 537: {
538: u_int status, id;
539:
1.23 djm 540: id = conn->msg_id++;
541: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 542: strlen(path), a);
543:
1.23 djm 544: status = get_status(conn->fd_in, id);
1.1 djm 545: if (status != SSH2_FX_OK)
546: error("Couldn't setstat on \"%s\": %s", path,
547: fx2txt(status));
548:
549: return(status);
550: }
551:
552: int
1.23 djm 553: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 554: Attrib *a)
555: {
556: u_int status, id;
557:
1.23 djm 558: id = conn->msg_id++;
559: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 560: handle_len, a);
561:
1.23 djm 562: status = get_status(conn->fd_in, id);
1.1 djm 563: if (status != SSH2_FX_OK)
564: error("Couldn't fsetstat: %s", fx2txt(status));
565:
566: return(status);
567: }
568:
569: char *
1.23 djm 570: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 571: {
572: Buffer msg;
573: u_int type, expected_id, count, id;
574: char *filename, *longname;
575: Attrib *a;
576:
1.23 djm 577: expected_id = id = conn->msg_id++;
578: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
579: strlen(path));
1.1 djm 580:
581: buffer_init(&msg);
582:
1.23 djm 583: get_msg(conn->fd_in, &msg);
1.1 djm 584: type = buffer_get_char(&msg);
585: id = buffer_get_int(&msg);
586:
587: if (id != expected_id)
1.33 deraadt 588: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 589:
590: if (type == SSH2_FXP_STATUS) {
591: u_int status = buffer_get_int(&msg);
592:
593: error("Couldn't canonicalise: %s", fx2txt(status));
594: return(NULL);
595: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 596: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 597: SSH2_FXP_NAME, type);
598:
599: count = buffer_get_int(&msg);
600: if (count != 1)
601: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
602:
603: filename = buffer_get_string(&msg, NULL);
604: longname = buffer_get_string(&msg, NULL);
605: a = decode_attrib(&msg);
606:
607: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
608:
609: xfree(longname);
610:
611: buffer_free(&msg);
612:
613: return(filename);
614: }
615:
616: int
1.23 djm 617: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 618: {
619: Buffer msg;
620: u_int status, id;
621:
622: buffer_init(&msg);
623:
624: /* Send rename request */
1.23 djm 625: id = conn->msg_id++;
1.1 djm 626: buffer_put_char(&msg, SSH2_FXP_RENAME);
627: buffer_put_int(&msg, id);
628: buffer_put_cstring(&msg, oldpath);
629: buffer_put_cstring(&msg, newpath);
1.23 djm 630: send_msg(conn->fd_out, &msg);
1.1 djm 631: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
632: newpath);
633: buffer_free(&msg);
634:
1.23 djm 635: status = get_status(conn->fd_in, id);
1.1 djm 636: if (status != SSH2_FX_OK)
1.23 djm 637: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
638: newpath, fx2txt(status));
1.1 djm 639:
640: return(status);
1.11 djm 641: }
642:
643: int
1.23 djm 644: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 645: {
646: Buffer msg;
647: u_int status, id;
648:
1.23 djm 649: if (conn->version < 3) {
650: error("This server does not support the symlink operation");
651: return(SSH2_FX_OP_UNSUPPORTED);
652: }
653:
1.11 djm 654: buffer_init(&msg);
655:
1.47.2.1 brad 656: /* Send symlink request */
1.23 djm 657: id = conn->msg_id++;
1.11 djm 658: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
659: buffer_put_int(&msg, id);
660: buffer_put_cstring(&msg, oldpath);
661: buffer_put_cstring(&msg, newpath);
1.23 djm 662: send_msg(conn->fd_out, &msg);
1.11 djm 663: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
664: newpath);
665: buffer_free(&msg);
666:
1.23 djm 667: status = get_status(conn->fd_in, id);
1.11 djm 668: if (status != SSH2_FX_OK)
1.36 markus 669: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 670: newpath, fx2txt(status));
1.11 djm 671:
672: return(status);
673: }
674:
675: char *
1.23 djm 676: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 677: {
678: Buffer msg;
679: u_int type, expected_id, count, id;
680: char *filename, *longname;
681: Attrib *a;
682:
1.23 djm 683: expected_id = id = conn->msg_id++;
684: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
685: strlen(path));
1.11 djm 686:
687: buffer_init(&msg);
688:
1.23 djm 689: get_msg(conn->fd_in, &msg);
1.11 djm 690: type = buffer_get_char(&msg);
691: id = buffer_get_int(&msg);
692:
693: if (id != expected_id)
1.33 deraadt 694: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 695:
696: if (type == SSH2_FXP_STATUS) {
697: u_int status = buffer_get_int(&msg);
698:
699: error("Couldn't readlink: %s", fx2txt(status));
700: return(NULL);
701: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 702: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 703: SSH2_FXP_NAME, type);
704:
705: count = buffer_get_int(&msg);
706: if (count != 1)
707: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
708:
709: filename = buffer_get_string(&msg, NULL);
710: longname = buffer_get_string(&msg, NULL);
711: a = decode_attrib(&msg);
712:
713: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
714:
715: xfree(longname);
716:
717: buffer_free(&msg);
718:
719: return(filename);
1.1 djm 720: }
721:
1.21 djm 722: static void
723: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
724: char *handle, u_int handle_len)
725: {
726: Buffer msg;
1.28 markus 727:
1.21 djm 728: buffer_init(&msg);
729: buffer_clear(&msg);
730: buffer_put_char(&msg, SSH2_FXP_READ);
731: buffer_put_int(&msg, id);
732: buffer_put_string(&msg, handle, handle_len);
733: buffer_put_int64(&msg, offset);
734: buffer_put_int(&msg, len);
735: send_msg(fd_out, &msg);
736: buffer_free(&msg);
1.28 markus 737: }
1.21 djm 738:
1.1 djm 739: int
1.23 djm 740: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
741: int pflag)
1.1 djm 742: {
1.21 djm 743: Attrib junk, *a;
744: Buffer msg;
1.1 djm 745: char *handle;
1.21 djm 746: int local_fd, status, num_req, max_req, write_error;
747: int read_error, write_errno;
748: u_int64_t offset, size;
1.23 djm 749: u_int handle_len, mode, type, id, buflen;
1.39 fgsch 750: off_t progress_counter;
1.21 djm 751: struct request {
752: u_int id;
753: u_int len;
754: u_int64_t offset;
1.28 markus 755: TAILQ_ENTRY(request) tq;
1.21 djm 756: };
757: TAILQ_HEAD(reqhead, request) requests;
758: struct request *req;
759:
760: TAILQ_INIT(&requests);
1.1 djm 761:
1.23 djm 762: a = do_stat(conn, remote_path, 0);
1.1 djm 763: if (a == NULL)
764: return(-1);
765:
766: /* XXX: should we preserve set[ug]id? */
767: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 768: mode = a->perm & 0777;
1.1 djm 769: else
770: mode = 0666;
771:
1.14 djm 772: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 773: (!S_ISREG(a->perm))) {
774: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 775: return(-1);
776: }
777:
1.21 djm 778: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
779: size = a->size;
780: else
781: size = 0;
782:
1.23 djm 783: buflen = conn->transfer_buflen;
1.1 djm 784: buffer_init(&msg);
785:
786: /* Send open request */
1.23 djm 787: id = conn->msg_id++;
1.1 djm 788: buffer_put_char(&msg, SSH2_FXP_OPEN);
789: buffer_put_int(&msg, id);
790: buffer_put_cstring(&msg, remote_path);
791: buffer_put_int(&msg, SSH2_FXF_READ);
792: attrib_clear(&junk); /* Send empty attributes */
793: encode_attrib(&msg, &junk);
1.23 djm 794: send_msg(conn->fd_out, &msg);
1.33 deraadt 795: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 796:
1.23 djm 797: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 798: if (handle == NULL) {
799: buffer_free(&msg);
800: return(-1);
801: }
802:
1.45 djm 803: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 804: mode | S_IWRITE);
1.23 djm 805: if (local_fd == -1) {
806: error("Couldn't open local file \"%s\" for writing: %s",
807: local_path, strerror(errno));
1.24 markus 808: buffer_free(&msg);
809: xfree(handle);
1.23 djm 810: return(-1);
811: }
812:
1.1 djm 813: /* Read from remote and write to local */
1.21 djm 814: write_error = read_error = write_errno = num_req = offset = 0;
815: max_req = 1;
1.39 fgsch 816: progress_counter = 0;
817:
1.47 djm 818: if (showprogress && size != 0)
819: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 820:
1.21 djm 821: while (num_req > 0 || max_req > 0) {
822: char *data;
1.1 djm 823: u_int len;
824:
1.47.2.1 brad 825: /*
826: * Simulate EOF on interrupt: stop sending new requests and
827: * allow outstanding requests to drain gracefully
828: */
829: if (interrupted) {
830: if (num_req == 0) /* If we haven't started yet... */
831: break;
832: max_req = 0;
833: }
834:
1.21 djm 835: /* Send some more requests */
836: while (num_req < max_req) {
1.28 markus 837: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 838: (unsigned long long)offset,
839: (unsigned long long)offset + buflen - 1,
840: num_req, max_req);
1.21 djm 841: req = xmalloc(sizeof(*req));
1.23 djm 842: req->id = conn->msg_id++;
1.21 djm 843: req->len = buflen;
844: req->offset = offset;
845: offset += buflen;
846: num_req++;
847: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 848: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 849: req->len, handle, handle_len);
850: }
1.1 djm 851:
852: buffer_clear(&msg);
1.23 djm 853: get_msg(conn->fd_in, &msg);
1.1 djm 854: type = buffer_get_char(&msg);
855: id = buffer_get_int(&msg);
1.33 deraadt 856: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 857:
858: /* Find the request in our queue */
859: for(req = TAILQ_FIRST(&requests);
860: req != NULL && req->id != id;
861: req = TAILQ_NEXT(req, tq))
862: ;
863: if (req == NULL)
864: fatal("Unexpected reply %u", id);
865:
866: switch (type) {
867: case SSH2_FXP_STATUS:
1.5 djm 868: status = buffer_get_int(&msg);
1.21 djm 869: if (status != SSH2_FX_EOF)
870: read_error = 1;
871: max_req = 0;
872: TAILQ_REMOVE(&requests, req, tq);
873: xfree(req);
874: num_req--;
875: break;
876: case SSH2_FXP_DATA:
877: data = buffer_get_string(&msg, &len);
1.26 itojun 878: debug3("Received data %llu -> %llu",
1.28 markus 879: (unsigned long long)req->offset,
1.26 itojun 880: (unsigned long long)req->offset + len - 1);
1.21 djm 881: if (len > req->len)
882: fatal("Received more data than asked for "
1.37 deraadt 883: "%u > %u", len, req->len);
1.21 djm 884: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 885: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 886: !write_error) {
887: write_errno = errno;
888: write_error = 1;
889: max_req = 0;
890: }
1.39 fgsch 891: progress_counter += len;
1.21 djm 892: xfree(data);
1.1 djm 893:
1.21 djm 894: if (len == req->len) {
895: TAILQ_REMOVE(&requests, req, tq);
896: xfree(req);
897: num_req--;
898: } else {
899: /* Resend the request for the missing data */
900: debug3("Short data block, re-requesting "
1.26 itojun 901: "%llu -> %llu (%2d)",
1.28 markus 902: (unsigned long long)req->offset + len,
1.27 itojun 903: (unsigned long long)req->offset +
904: req->len - 1, num_req);
1.23 djm 905: req->id = conn->msg_id++;
1.21 djm 906: req->len -= len;
907: req->offset += len;
1.28 markus 908: send_read_request(conn->fd_out, req->id,
1.23 djm 909: req->offset, req->len, handle, handle_len);
1.21 djm 910: /* Reduce the request size */
911: if (len < buflen)
912: buflen = MAX(MIN_READ_SIZE, len);
913: }
914: if (max_req > 0) { /* max_req = 0 iff EOF received */
915: if (size > 0 && offset > size) {
916: /* Only one request at a time
917: * after the expected EOF */
918: debug3("Finish at %llu (%2d)",
1.26 itojun 919: (unsigned long long)offset,
920: num_req);
1.21 djm 921: max_req = 1;
1.47.2.1 brad 922: } else if (max_req <= conn->num_requests) {
1.21 djm 923: ++max_req;
924: }
1.1 djm 925: }
1.21 djm 926: break;
927: default:
1.33 deraadt 928: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 929: SSH2_FXP_DATA, type);
930: }
1.21 djm 931: }
1.1 djm 932:
1.39 fgsch 933: if (showprogress && size)
934: stop_progress_meter();
935:
1.21 djm 936: /* Sanity check */
937: if (TAILQ_FIRST(&requests) != NULL)
938: fatal("Transfer complete, but requests still in queue");
939:
940: if (read_error) {
1.28 markus 941: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 942: remote_path, fx2txt(status));
1.23 djm 943: do_close(conn, handle, handle_len);
1.21 djm 944: } else if (write_error) {
945: error("Couldn't write to \"%s\": %s", local_path,
946: strerror(write_errno));
947: status = -1;
1.23 djm 948: do_close(conn, handle, handle_len);
1.21 djm 949: } else {
1.23 djm 950: status = do_close(conn, handle, handle_len);
1.21 djm 951:
952: /* Override umask and utimes if asked */
953: if (pflag && fchmod(local_fd, mode) == -1)
954: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 955: strerror(errno));
1.21 djm 956: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
957: struct timeval tv[2];
958: tv[0].tv_sec = a->atime;
959: tv[1].tv_sec = a->mtime;
960: tv[0].tv_usec = tv[1].tv_usec = 0;
961: if (utimes(local_path, tv) == -1)
962: error("Can't set times on \"%s\": %s",
1.37 deraadt 963: local_path, strerror(errno));
1.1 djm 964: }
1.10 djm 965: }
1.5 djm 966: close(local_fd);
967: buffer_free(&msg);
1.1 djm 968: xfree(handle);
1.23 djm 969:
970: return(status);
1.1 djm 971: }
972:
973: int
1.23 djm 974: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
975: int pflag)
1.1 djm 976: {
1.20 djm 977: int local_fd, status;
1.22 djm 978: u_int handle_len, id, type;
1.1 djm 979: u_int64_t offset;
1.20 djm 980: char *handle, *data;
1.1 djm 981: Buffer msg;
982: struct stat sb;
983: Attrib a;
1.21 djm 984: u_int32_t startid;
985: u_int32_t ackid;
1.22 djm 986: struct outstanding_ack {
987: u_int id;
988: u_int len;
989: u_int64_t offset;
1.28 markus 990: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 991: };
992: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.47.2.1 brad 993: struct outstanding_ack *ack = NULL;
1.22 djm 994:
995: TAILQ_INIT(&acks);
1.1 djm 996:
997: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
998: error("Couldn't open local file \"%s\" for reading: %s",
999: local_path, strerror(errno));
1000: return(-1);
1001: }
1002: if (fstat(local_fd, &sb) == -1) {
1003: error("Couldn't fstat local file \"%s\": %s",
1004: local_path, strerror(errno));
1.41 djm 1005: close(local_fd);
1006: return(-1);
1007: }
1008: if (!S_ISREG(sb.st_mode)) {
1009: error("%s is not a regular file", local_path);
1.1 djm 1010: close(local_fd);
1011: return(-1);
1012: }
1013: stat_to_attrib(&sb, &a);
1014:
1015: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1016: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1017: a.perm &= 0777;
1018: if (!pflag)
1019: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1020:
1021: buffer_init(&msg);
1022:
1023: /* Send open request */
1.23 djm 1024: id = conn->msg_id++;
1.1 djm 1025: buffer_put_char(&msg, SSH2_FXP_OPEN);
1026: buffer_put_int(&msg, id);
1027: buffer_put_cstring(&msg, remote_path);
1028: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1029: encode_attrib(&msg, &a);
1.23 djm 1030: send_msg(conn->fd_out, &msg);
1.33 deraadt 1031: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1032:
1033: buffer_clear(&msg);
1034:
1.23 djm 1035: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1036: if (handle == NULL) {
1037: close(local_fd);
1038: buffer_free(&msg);
1039: return(-1);
1040: }
1041:
1.21 djm 1042: startid = ackid = id + 1;
1.23 djm 1043: data = xmalloc(conn->transfer_buflen);
1.20 djm 1044:
1.1 djm 1045: /* Read from local and write to remote */
1046: offset = 0;
1.39 fgsch 1047: if (showprogress)
1048: start_progress_meter(local_path, sb.st_size, &offset);
1049:
1.19 deraadt 1050: for (;;) {
1.1 djm 1051: int len;
1052:
1053: /*
1.47.2.1 brad 1054: * Can't use atomicio here because it returns 0 on EOF,
1055: * thus losing the last block of the file.
1056: * Simulate an EOF on interrupt, allowing ACKs from the
1057: * server to drain.
1.1 djm 1058: */
1.47.2.1 brad 1059: if (interrupted)
1060: len = 0;
1061: else do
1.23 djm 1062: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1063: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1064:
1065: if (len == -1)
1066: fatal("Couldn't read from \"%s\": %s", local_path,
1067: strerror(errno));
1.21 djm 1068:
1069: if (len != 0) {
1.22 djm 1070: ack = xmalloc(sizeof(*ack));
1071: ack->id = ++id;
1072: ack->offset = offset;
1073: ack->len = len;
1074: TAILQ_INSERT_TAIL(&acks, ack, tq);
1075:
1.21 djm 1076: buffer_clear(&msg);
1077: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1078: buffer_put_int(&msg, ack->id);
1.21 djm 1079: buffer_put_string(&msg, handle, handle_len);
1080: buffer_put_int64(&msg, offset);
1081: buffer_put_string(&msg, data, len);
1.23 djm 1082: send_msg(conn->fd_out, &msg);
1.33 deraadt 1083: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1084: id, (unsigned long long)offset, len);
1.22 djm 1085: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1086: break;
1087:
1.22 djm 1088: if (ack == NULL)
1089: fatal("Unexpected ACK %u", id);
1090:
1.28 markus 1091: if (id == startid || len == 0 ||
1.23 djm 1092: id - ackid >= conn->num_requests) {
1.32 markus 1093: u_int r_id;
1.31 djm 1094:
1.22 djm 1095: buffer_clear(&msg);
1.23 djm 1096: get_msg(conn->fd_in, &msg);
1.22 djm 1097: type = buffer_get_char(&msg);
1.31 djm 1098: r_id = buffer_get_int(&msg);
1.22 djm 1099:
1100: if (type != SSH2_FXP_STATUS)
1101: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1102: "got %d", SSH2_FXP_STATUS, type);
1103:
1104: status = buffer_get_int(&msg);
1105: debug3("SSH2_FXP_STATUS %d", status);
1106:
1107: /* Find the request in our queue */
1108: for(ack = TAILQ_FIRST(&acks);
1.31 djm 1109: ack != NULL && ack->id != r_id;
1.22 djm 1110: ack = TAILQ_NEXT(ack, tq))
1111: ;
1112: if (ack == NULL)
1.33 deraadt 1113: fatal("Can't find request for ID %u", r_id);
1.22 djm 1114: TAILQ_REMOVE(&acks, ack, tq);
1115:
1.21 djm 1116: if (status != SSH2_FX_OK) {
1117: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1118: remote_path, fx2txt(status));
1.23 djm 1119: do_close(conn, handle, handle_len);
1.21 djm 1120: close(local_fd);
1.42 markus 1121: xfree(data);
1122: xfree(ack);
1.21 djm 1123: goto done;
1124: }
1.33 deraadt 1125: debug3("In write loop, ack for %u %u bytes at %llu",
1.26 itojun 1126: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1127: ++ackid;
1.34 deraadt 1128: xfree(ack);
1.1 djm 1129: }
1130: offset += len;
1131: }
1.39 fgsch 1132: if (showprogress)
1133: stop_progress_meter();
1.20 djm 1134: xfree(data);
1.1 djm 1135:
1136: if (close(local_fd) == -1) {
1137: error("Couldn't close local file \"%s\": %s", local_path,
1138: strerror(errno));
1.23 djm 1139: do_close(conn, handle, handle_len);
1.5 djm 1140: status = -1;
1141: goto done;
1.1 djm 1142: }
1143:
1.10 djm 1144: /* Override umask and utimes if asked */
1145: if (pflag)
1.23 djm 1146: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1147:
1.23 djm 1148: status = do_close(conn, handle, handle_len);
1.5 djm 1149:
1150: done:
1151: xfree(handle);
1152: buffer_free(&msg);
1.23 djm 1153: return(status);
1.1 djm 1154: }
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