Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.53.2.1
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"
1.53.2.1! brad 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:
1.40 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));
1.53.2.1! brad 67: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) != sizeof(mlen))
1.40 djm 68: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 69:
1.53.2.1! brad 70: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) != buffer_len(m))
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: u_int msg_len;
1.1 djm 80:
1.40 djm 81: buffer_append_space(m, 4);
1.53.2.1! brad 82: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
! 83: if (errno == EPIPE)
! 84: fatal("Connection closed");
! 85: else
! 86: fatal("Couldn't read packet: %s", strerror(errno));
! 87: }
1.1 djm 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);
1.53.2.1! brad 94: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
! 95: if (errno == EPIPE)
! 96: fatal("Connection closed");
! 97: else
! 98: fatal("Read packet: %s", strerror(errno));
! 99: }
1.1 djm 100: }
101:
1.17 itojun 102: static void
1.1 djm 103: send_string_request(int fd, u_int id, u_int code, char *s,
104: u_int len)
105: {
106: Buffer msg;
107:
108: buffer_init(&msg);
109: buffer_put_char(&msg, code);
110: buffer_put_int(&msg, id);
111: buffer_put_string(&msg, s, len);
112: send_msg(fd, &msg);
1.33 deraadt 113: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 114: buffer_free(&msg);
115: }
116:
1.17 itojun 117: static void
1.1 djm 118: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
119: u_int len, Attrib *a)
120: {
121: Buffer msg;
122:
123: buffer_init(&msg);
124: buffer_put_char(&msg, code);
125: buffer_put_int(&msg, id);
126: buffer_put_string(&msg, s, len);
127: encode_attrib(&msg, a);
128: send_msg(fd, &msg);
1.33 deraadt 129: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 130: buffer_free(&msg);
131: }
132:
1.17 itojun 133: static u_int
1.33 deraadt 134: get_status(int fd, u_int expected_id)
1.1 djm 135: {
136: Buffer msg;
137: u_int type, id, status;
138:
139: buffer_init(&msg);
140: get_msg(fd, &msg);
141: type = buffer_get_char(&msg);
142: id = buffer_get_int(&msg);
143:
144: if (id != expected_id)
1.33 deraadt 145: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 146: if (type != SSH2_FXP_STATUS)
1.33 deraadt 147: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 148: SSH2_FXP_STATUS, type);
149:
150: status = buffer_get_int(&msg);
151: buffer_free(&msg);
152:
1.33 deraadt 153: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 154:
155: return(status);
156: }
157:
1.17 itojun 158: static char *
1.1 djm 159: get_handle(int fd, u_int expected_id, u_int *len)
160: {
161: Buffer msg;
162: u_int type, id;
163: char *handle;
164:
165: buffer_init(&msg);
166: get_msg(fd, &msg);
167: type = buffer_get_char(&msg);
168: id = buffer_get_int(&msg);
169:
170: if (id != expected_id)
1.33 deraadt 171: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 172: if (type == SSH2_FXP_STATUS) {
173: int status = buffer_get_int(&msg);
174:
175: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 176: buffer_free(&msg);
1.1 djm 177: return(NULL);
178: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 179: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 180: SSH2_FXP_HANDLE, type);
181:
182: handle = buffer_get_string(&msg, len);
183: buffer_free(&msg);
184:
185: return(handle);
186: }
187:
1.17 itojun 188: static Attrib *
1.14 djm 189: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 190: {
191: Buffer msg;
192: u_int type, id;
193: Attrib *a;
194:
195: buffer_init(&msg);
196: get_msg(fd, &msg);
197:
198: type = buffer_get_char(&msg);
199: id = buffer_get_int(&msg);
200:
1.33 deraadt 201: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 202: if (id != expected_id)
1.33 deraadt 203: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 204: if (type == SSH2_FXP_STATUS) {
205: int status = buffer_get_int(&msg);
206:
1.14 djm 207: if (quiet)
208: debug("Couldn't stat remote file: %s", fx2txt(status));
209: else
210: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 211: buffer_free(&msg);
1.1 djm 212: return(NULL);
213: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 214: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 215: SSH2_FXP_ATTRS, type);
216: }
217: a = decode_attrib(&msg);
218: buffer_free(&msg);
219:
220: return(a);
221: }
222:
1.23 djm 223: struct sftp_conn *
224: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 225: {
1.33 deraadt 226: u_int type;
227: int version;
1.1 djm 228: Buffer msg;
1.23 djm 229: struct sftp_conn *ret;
1.1 djm 230:
231: buffer_init(&msg);
232: buffer_put_char(&msg, SSH2_FXP_INIT);
233: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
234: send_msg(fd_out, &msg);
235:
236: buffer_clear(&msg);
237:
238: get_msg(fd_in, &msg);
239:
1.3 stevesk 240: /* Expecting a VERSION reply */
1.1 djm 241: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 242: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 243: type);
244: buffer_free(&msg);
1.23 djm 245: return(NULL);
1.1 djm 246: }
247: version = buffer_get_int(&msg);
248:
249: debug2("Remote version: %d", version);
250:
251: /* Check for extensions */
252: while (buffer_len(&msg) > 0) {
253: char *name = buffer_get_string(&msg, NULL);
254: char *value = buffer_get_string(&msg, NULL);
255:
256: debug2("Init extension: \"%s\"", name);
257: xfree(name);
258: xfree(value);
259: }
260:
261: buffer_free(&msg);
1.11 djm 262:
1.23 djm 263: ret = xmalloc(sizeof(*ret));
264: ret->fd_in = fd_in;
265: ret->fd_out = fd_out;
266: ret->transfer_buflen = transfer_buflen;
267: ret->num_requests = num_requests;
268: ret->version = version;
269: ret->msg_id = 1;
270:
271: /* Some filexfer v.0 servers don't support large packets */
272: if (version == 0)
1.29 markus 273: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 274:
275: return(ret);
276: }
277:
278: u_int
279: sftp_proto_version(struct sftp_conn *conn)
280: {
281: return(conn->version);
1.1 djm 282: }
283:
284: int
1.23 djm 285: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 286: {
287: u_int id, status;
288: Buffer msg;
289:
290: buffer_init(&msg);
291:
1.23 djm 292: id = conn->msg_id++;
1.1 djm 293: buffer_put_char(&msg, SSH2_FXP_CLOSE);
294: buffer_put_int(&msg, id);
295: buffer_put_string(&msg, handle, handle_len);
1.23 djm 296: send_msg(conn->fd_out, &msg);
1.33 deraadt 297: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 298:
1.23 djm 299: status = get_status(conn->fd_in, id);
1.1 djm 300: if (status != SSH2_FX_OK)
301: error("Couldn't close file: %s", fx2txt(status));
302:
303: buffer_free(&msg);
304:
305: return(status);
306: }
307:
1.12 djm 308:
1.17 itojun 309: static int
1.23 djm 310: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 311: SFTP_DIRENT ***dir)
1.1 djm 312: {
313: Buffer msg;
1.53.2.1! brad 314: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 315: char *handle;
316:
1.23 djm 317: id = conn->msg_id++;
1.1 djm 318:
319: buffer_init(&msg);
320: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
321: buffer_put_int(&msg, id);
322: buffer_put_cstring(&msg, path);
1.23 djm 323: send_msg(conn->fd_out, &msg);
1.1 djm 324:
325: buffer_clear(&msg);
326:
1.23 djm 327: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 328: if (handle == NULL)
329: return(-1);
330:
1.12 djm 331: if (dir) {
332: ents = 0;
333: *dir = xmalloc(sizeof(**dir));
334: (*dir)[0] = NULL;
335: }
336:
1.49 djm 337: for (; !interrupted;) {
1.23 djm 338: id = expected_id = conn->msg_id++;
1.1 djm 339:
1.33 deraadt 340: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 341:
342: buffer_clear(&msg);
343: buffer_put_char(&msg, SSH2_FXP_READDIR);
344: buffer_put_int(&msg, id);
345: buffer_put_string(&msg, handle, handle_len);
1.23 djm 346: send_msg(conn->fd_out, &msg);
1.1 djm 347:
348: buffer_clear(&msg);
349:
1.23 djm 350: get_msg(conn->fd_in, &msg);
1.1 djm 351:
352: type = buffer_get_char(&msg);
353: id = buffer_get_int(&msg);
354:
1.33 deraadt 355: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 356:
357: if (id != expected_id)
1.33 deraadt 358: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 359:
360: if (type == SSH2_FXP_STATUS) {
361: int status = buffer_get_int(&msg);
362:
363: debug3("Received SSH2_FXP_STATUS %d", status);
364:
365: if (status == SSH2_FX_EOF) {
366: break;
367: } else {
368: error("Couldn't read directory: %s",
369: fx2txt(status));
1.23 djm 370: do_close(conn, handle, handle_len);
1.42 markus 371: xfree(handle);
1.9 djm 372: return(status);
1.1 djm 373: }
374: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 375: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 376: SSH2_FXP_NAME, type);
377:
378: count = buffer_get_int(&msg);
1.7 markus 379: if (count == 0)
380: break;
1.8 stevesk 381: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 382: for (i = 0; i < count; i++) {
1.1 djm 383: char *filename, *longname;
384: Attrib *a;
385:
386: filename = buffer_get_string(&msg, NULL);
387: longname = buffer_get_string(&msg, NULL);
388: a = decode_attrib(&msg);
389:
1.12 djm 390: if (printflag)
391: printf("%s\n", longname);
392:
393: if (dir) {
1.16 markus 394: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 395: (ents + 2));
396: (*dir)[ents] = xmalloc(sizeof(***dir));
397: (*dir)[ents]->filename = xstrdup(filename);
398: (*dir)[ents]->longname = xstrdup(longname);
399: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
400: (*dir)[++ents] = NULL;
401: }
1.1 djm 402:
403: xfree(filename);
404: xfree(longname);
405: }
406: }
407:
408: buffer_free(&msg);
1.23 djm 409: do_close(conn, handle, handle_len);
1.1 djm 410: xfree(handle);
411:
1.49 djm 412: /* Don't return partial matches on interrupt */
413: if (interrupted && dir != NULL && *dir != NULL) {
414: free_sftp_dirents(*dir);
415: *dir = xmalloc(sizeof(**dir));
416: **dir = NULL;
417: }
418:
1.1 djm 419: return(0);
1.12 djm 420: }
421:
422: int
1.23 djm 423: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 424: {
1.23 djm 425: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 426: }
427:
428: void free_sftp_dirents(SFTP_DIRENT **s)
429: {
430: int i;
1.19 deraadt 431:
432: for (i = 0; s[i]; i++) {
1.12 djm 433: xfree(s[i]->filename);
434: xfree(s[i]->longname);
435: xfree(s[i]);
436: }
437: xfree(s);
438: }
439:
440: int
1.23 djm 441: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 442: {
443: u_int status, id;
444:
445: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
446:
1.23 djm 447: id = conn->msg_id++;
1.28 markus 448: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 449: strlen(path));
450: status = get_status(conn->fd_in, id);
1.1 djm 451: if (status != SSH2_FX_OK)
452: error("Couldn't delete file: %s", fx2txt(status));
453: return(status);
454: }
455:
456: int
1.23 djm 457: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 458: {
459: u_int status, id;
460:
1.23 djm 461: id = conn->msg_id++;
462: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 463: strlen(path), a);
464:
1.23 djm 465: status = get_status(conn->fd_in, id);
1.1 djm 466: if (status != SSH2_FX_OK)
467: error("Couldn't create directory: %s", fx2txt(status));
468:
469: return(status);
470: }
471:
472: int
1.23 djm 473: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 474: {
475: u_int status, id;
476:
1.23 djm 477: id = conn->msg_id++;
478: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
479: strlen(path));
1.1 djm 480:
1.23 djm 481: status = get_status(conn->fd_in, id);
1.1 djm 482: if (status != SSH2_FX_OK)
483: error("Couldn't remove directory: %s", fx2txt(status));
484:
485: return(status);
486: }
487:
488: Attrib *
1.23 djm 489: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 490: {
491: u_int id;
492:
1.23 djm 493: id = conn->msg_id++;
494:
1.28 markus 495: send_string_request(conn->fd_out, id,
496: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 497: path, strlen(path));
498:
499: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 500: }
501:
502: Attrib *
1.23 djm 503: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 504: {
505: u_int id;
506:
1.23 djm 507: if (conn->version == 0) {
508: if (quiet)
509: debug("Server version does not support lstat operation");
510: else
1.43 itojun 511: logit("Server version does not support lstat operation");
1.30 markus 512: return(do_stat(conn, path, quiet));
1.23 djm 513: }
514:
515: id = conn->msg_id++;
516: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
517: strlen(path));
518:
519: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 520: }
521:
522: Attrib *
1.23 djm 523: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 524: {
525: u_int id;
526:
1.23 djm 527: id = conn->msg_id++;
528: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
529: handle_len);
530:
531: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 532: }
533:
534: int
1.23 djm 535: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 536: {
537: u_int status, id;
538:
1.23 djm 539: id = conn->msg_id++;
540: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 541: strlen(path), a);
542:
1.23 djm 543: status = get_status(conn->fd_in, id);
1.1 djm 544: if (status != SSH2_FX_OK)
545: error("Couldn't setstat on \"%s\": %s", path,
546: fx2txt(status));
547:
548: return(status);
549: }
550:
551: int
1.23 djm 552: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 553: Attrib *a)
554: {
555: u_int status, id;
556:
1.23 djm 557: id = conn->msg_id++;
558: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 559: handle_len, a);
560:
1.23 djm 561: status = get_status(conn->fd_in, id);
1.1 djm 562: if (status != SSH2_FX_OK)
563: error("Couldn't fsetstat: %s", fx2txt(status));
564:
565: return(status);
566: }
567:
568: char *
1.23 djm 569: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 570: {
571: Buffer msg;
572: u_int type, expected_id, count, id;
573: char *filename, *longname;
574: Attrib *a;
575:
1.23 djm 576: expected_id = id = conn->msg_id++;
577: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
578: strlen(path));
1.1 djm 579:
580: buffer_init(&msg);
581:
1.23 djm 582: get_msg(conn->fd_in, &msg);
1.1 djm 583: type = buffer_get_char(&msg);
584: id = buffer_get_int(&msg);
585:
586: if (id != expected_id)
1.33 deraadt 587: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 588:
589: if (type == SSH2_FXP_STATUS) {
590: u_int status = buffer_get_int(&msg);
591:
592: error("Couldn't canonicalise: %s", fx2txt(status));
593: return(NULL);
594: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 595: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 596: SSH2_FXP_NAME, type);
597:
598: count = buffer_get_int(&msg);
599: if (count != 1)
600: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
601:
602: filename = buffer_get_string(&msg, NULL);
603: longname = buffer_get_string(&msg, NULL);
604: a = decode_attrib(&msg);
605:
606: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
607:
608: xfree(longname);
609:
610: buffer_free(&msg);
611:
612: return(filename);
613: }
614:
615: int
1.23 djm 616: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 617: {
618: Buffer msg;
619: u_int status, id;
620:
621: buffer_init(&msg);
622:
623: /* Send rename request */
1.23 djm 624: id = conn->msg_id++;
1.1 djm 625: buffer_put_char(&msg, SSH2_FXP_RENAME);
626: buffer_put_int(&msg, id);
627: buffer_put_cstring(&msg, oldpath);
628: buffer_put_cstring(&msg, newpath);
1.23 djm 629: send_msg(conn->fd_out, &msg);
1.1 djm 630: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
631: newpath);
632: buffer_free(&msg);
633:
1.23 djm 634: status = get_status(conn->fd_in, id);
1.1 djm 635: if (status != SSH2_FX_OK)
1.23 djm 636: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
637: newpath, fx2txt(status));
1.1 djm 638:
639: return(status);
1.11 djm 640: }
641:
642: int
1.23 djm 643: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 644: {
645: Buffer msg;
646: u_int status, id;
647:
1.23 djm 648: if (conn->version < 3) {
649: error("This server does not support the symlink operation");
650: return(SSH2_FX_OP_UNSUPPORTED);
651: }
652:
1.11 djm 653: buffer_init(&msg);
654:
1.48 djm 655: /* Send symlink request */
1.23 djm 656: id = conn->msg_id++;
1.11 djm 657: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
658: buffer_put_int(&msg, id);
659: buffer_put_cstring(&msg, oldpath);
660: buffer_put_cstring(&msg, newpath);
1.23 djm 661: send_msg(conn->fd_out, &msg);
1.11 djm 662: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
663: newpath);
664: buffer_free(&msg);
665:
1.23 djm 666: status = get_status(conn->fd_in, id);
1.11 djm 667: if (status != SSH2_FX_OK)
1.36 markus 668: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 669: newpath, fx2txt(status));
1.11 djm 670:
671: return(status);
672: }
673:
674: char *
1.23 djm 675: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 676: {
677: Buffer msg;
678: u_int type, expected_id, count, id;
679: char *filename, *longname;
680: Attrib *a;
681:
1.23 djm 682: expected_id = id = conn->msg_id++;
683: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
684: strlen(path));
1.11 djm 685:
686: buffer_init(&msg);
687:
1.23 djm 688: get_msg(conn->fd_in, &msg);
1.11 djm 689: type = buffer_get_char(&msg);
690: id = buffer_get_int(&msg);
691:
692: if (id != expected_id)
1.33 deraadt 693: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 694:
695: if (type == SSH2_FXP_STATUS) {
696: u_int status = buffer_get_int(&msg);
697:
698: error("Couldn't readlink: %s", fx2txt(status));
699: return(NULL);
700: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 701: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 702: SSH2_FXP_NAME, type);
703:
704: count = buffer_get_int(&msg);
705: if (count != 1)
706: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
707:
708: filename = buffer_get_string(&msg, NULL);
709: longname = buffer_get_string(&msg, NULL);
710: a = decode_attrib(&msg);
711:
712: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
713:
714: xfree(longname);
715:
716: buffer_free(&msg);
717:
718: return(filename);
1.1 djm 719: }
720:
1.21 djm 721: static void
722: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
723: char *handle, u_int handle_len)
724: {
725: Buffer msg;
1.28 markus 726:
1.21 djm 727: buffer_init(&msg);
728: buffer_clear(&msg);
729: buffer_put_char(&msg, SSH2_FXP_READ);
730: buffer_put_int(&msg, id);
731: buffer_put_string(&msg, handle, handle_len);
732: buffer_put_int64(&msg, offset);
733: buffer_put_int(&msg, len);
734: send_msg(fd_out, &msg);
735: buffer_free(&msg);
1.28 markus 736: }
1.21 djm 737:
1.1 djm 738: int
1.23 djm 739: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
740: int pflag)
1.1 djm 741: {
1.21 djm 742: Attrib junk, *a;
743: Buffer msg;
1.1 djm 744: char *handle;
1.53.2.1! brad 745: int local_fd, status = 0, write_error;
1.21 djm 746: int read_error, write_errno;
747: u_int64_t offset, size;
1.53.2.1! brad 748: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 749: off_t progress_counter;
1.21 djm 750: struct request {
751: u_int id;
752: u_int len;
753: u_int64_t offset;
1.28 markus 754: TAILQ_ENTRY(request) tq;
1.21 djm 755: };
756: TAILQ_HEAD(reqhead, request) requests;
757: struct request *req;
758:
759: TAILQ_INIT(&requests);
1.1 djm 760:
1.23 djm 761: a = do_stat(conn, remote_path, 0);
1.1 djm 762: if (a == NULL)
763: return(-1);
764:
765: /* XXX: should we preserve set[ug]id? */
766: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 767: mode = a->perm & 0777;
1.1 djm 768: else
769: mode = 0666;
770:
1.14 djm 771: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 772: (!S_ISREG(a->perm))) {
773: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 774: return(-1);
775: }
776:
1.21 djm 777: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
778: size = a->size;
779: else
780: size = 0;
781:
1.23 djm 782: buflen = conn->transfer_buflen;
1.1 djm 783: buffer_init(&msg);
784:
785: /* Send open request */
1.23 djm 786: id = conn->msg_id++;
1.1 djm 787: buffer_put_char(&msg, SSH2_FXP_OPEN);
788: buffer_put_int(&msg, id);
789: buffer_put_cstring(&msg, remote_path);
790: buffer_put_int(&msg, SSH2_FXF_READ);
791: attrib_clear(&junk); /* Send empty attributes */
792: encode_attrib(&msg, &junk);
1.23 djm 793: send_msg(conn->fd_out, &msg);
1.33 deraadt 794: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 795:
1.23 djm 796: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 797: if (handle == NULL) {
798: buffer_free(&msg);
799: return(-1);
800: }
801:
1.45 djm 802: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 803: mode | S_IWRITE);
1.23 djm 804: if (local_fd == -1) {
805: error("Couldn't open local file \"%s\" for writing: %s",
806: local_path, strerror(errno));
1.24 markus 807: buffer_free(&msg);
808: xfree(handle);
1.23 djm 809: return(-1);
810: }
811:
1.1 djm 812: /* Read from remote and write to local */
1.21 djm 813: write_error = read_error = write_errno = num_req = offset = 0;
814: max_req = 1;
1.39 fgsch 815: progress_counter = 0;
816:
1.47 djm 817: if (showprogress && size != 0)
818: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 819:
1.21 djm 820: while (num_req > 0 || max_req > 0) {
821: char *data;
1.1 djm 822: u_int len;
823:
1.49 djm 824: /*
1.51 deraadt 825: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 826: * allow outstanding requests to drain gracefully
827: */
828: if (interrupted) {
829: if (num_req == 0) /* If we haven't started yet... */
830: break;
831: max_req = 0;
832: }
833:
1.21 djm 834: /* Send some more requests */
835: while (num_req < max_req) {
1.28 markus 836: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 837: (unsigned long long)offset,
838: (unsigned long long)offset + buflen - 1,
839: num_req, max_req);
1.21 djm 840: req = xmalloc(sizeof(*req));
1.23 djm 841: req->id = conn->msg_id++;
1.21 djm 842: req->len = buflen;
843: req->offset = offset;
844: offset += buflen;
845: num_req++;
846: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 847: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 848: req->len, handle, handle_len);
849: }
1.1 djm 850:
851: buffer_clear(&msg);
1.23 djm 852: get_msg(conn->fd_in, &msg);
1.1 djm 853: type = buffer_get_char(&msg);
854: id = buffer_get_int(&msg);
1.33 deraadt 855: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 856:
857: /* Find the request in our queue */
1.53 deraadt 858: for (req = TAILQ_FIRST(&requests);
1.21 djm 859: req != NULL && req->id != id;
860: req = TAILQ_NEXT(req, tq))
861: ;
862: if (req == NULL)
863: fatal("Unexpected reply %u", id);
864:
865: switch (type) {
866: case SSH2_FXP_STATUS:
1.5 djm 867: status = buffer_get_int(&msg);
1.21 djm 868: if (status != SSH2_FX_EOF)
869: read_error = 1;
870: max_req = 0;
871: TAILQ_REMOVE(&requests, req, tq);
872: xfree(req);
873: num_req--;
874: break;
875: case SSH2_FXP_DATA:
876: data = buffer_get_string(&msg, &len);
1.26 itojun 877: debug3("Received data %llu -> %llu",
1.28 markus 878: (unsigned long long)req->offset,
1.26 itojun 879: (unsigned long long)req->offset + len - 1);
1.21 djm 880: if (len > req->len)
881: fatal("Received more data than asked for "
1.37 deraadt 882: "%u > %u", len, req->len);
1.21 djm 883: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 884: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 885: !write_error) {
886: write_errno = errno;
887: write_error = 1;
888: max_req = 0;
889: }
1.39 fgsch 890: progress_counter += len;
1.21 djm 891: xfree(data);
1.1 djm 892:
1.21 djm 893: if (len == req->len) {
894: TAILQ_REMOVE(&requests, req, tq);
895: xfree(req);
896: num_req--;
897: } else {
898: /* Resend the request for the missing data */
899: debug3("Short data block, re-requesting "
1.26 itojun 900: "%llu -> %llu (%2d)",
1.28 markus 901: (unsigned long long)req->offset + len,
1.27 itojun 902: (unsigned long long)req->offset +
903: req->len - 1, num_req);
1.23 djm 904: req->id = conn->msg_id++;
1.21 djm 905: req->len -= len;
906: req->offset += len;
1.28 markus 907: send_read_request(conn->fd_out, req->id,
1.23 djm 908: req->offset, req->len, handle, handle_len);
1.21 djm 909: /* Reduce the request size */
910: if (len < buflen)
911: buflen = MAX(MIN_READ_SIZE, len);
912: }
913: if (max_req > 0) { /* max_req = 0 iff EOF received */
914: if (size > 0 && offset > size) {
915: /* Only one request at a time
916: * after the expected EOF */
917: debug3("Finish at %llu (%2d)",
1.26 itojun 918: (unsigned long long)offset,
919: num_req);
1.21 djm 920: max_req = 1;
1.49 djm 921: } else if (max_req <= conn->num_requests) {
1.21 djm 922: ++max_req;
923: }
1.1 djm 924: }
1.21 djm 925: break;
926: default:
1.33 deraadt 927: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 928: SSH2_FXP_DATA, type);
929: }
1.21 djm 930: }
1.1 djm 931:
1.39 fgsch 932: if (showprogress && size)
933: stop_progress_meter();
934:
1.21 djm 935: /* Sanity check */
936: if (TAILQ_FIRST(&requests) != NULL)
937: fatal("Transfer complete, but requests still in queue");
938:
939: if (read_error) {
1.28 markus 940: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 941: remote_path, fx2txt(status));
1.23 djm 942: do_close(conn, handle, handle_len);
1.21 djm 943: } else if (write_error) {
944: error("Couldn't write to \"%s\": %s", local_path,
945: strerror(write_errno));
946: status = -1;
1.23 djm 947: do_close(conn, handle, handle_len);
1.21 djm 948: } else {
1.23 djm 949: status = do_close(conn, handle, handle_len);
1.21 djm 950:
951: /* Override umask and utimes if asked */
952: if (pflag && fchmod(local_fd, mode) == -1)
953: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 954: strerror(errno));
1.21 djm 955: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
956: struct timeval tv[2];
957: tv[0].tv_sec = a->atime;
958: tv[1].tv_sec = a->mtime;
959: tv[0].tv_usec = tv[1].tv_usec = 0;
960: if (utimes(local_path, tv) == -1)
961: error("Can't set times on \"%s\": %s",
1.37 deraadt 962: local_path, strerror(errno));
1.1 djm 963: }
1.10 djm 964: }
1.5 djm 965: close(local_fd);
966: buffer_free(&msg);
1.1 djm 967: xfree(handle);
1.23 djm 968:
969: return(status);
1.1 djm 970: }
971:
972: int
1.23 djm 973: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
974: int pflag)
1.1 djm 975: {
1.20 djm 976: int local_fd, status;
1.22 djm 977: u_int handle_len, id, type;
1.1 djm 978: u_int64_t offset;
1.20 djm 979: char *handle, *data;
1.1 djm 980: Buffer msg;
981: struct stat sb;
982: Attrib a;
1.21 djm 983: u_int32_t startid;
984: u_int32_t ackid;
1.22 djm 985: struct outstanding_ack {
986: u_int id;
987: u_int len;
988: u_int64_t offset;
1.28 markus 989: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 990: };
991: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 992: struct outstanding_ack *ack = NULL;
1.22 djm 993:
994: TAILQ_INIT(&acks);
1.1 djm 995:
996: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
997: error("Couldn't open local file \"%s\" for reading: %s",
998: local_path, strerror(errno));
999: return(-1);
1000: }
1001: if (fstat(local_fd, &sb) == -1) {
1002: error("Couldn't fstat local file \"%s\": %s",
1003: local_path, strerror(errno));
1.41 djm 1004: close(local_fd);
1005: return(-1);
1006: }
1007: if (!S_ISREG(sb.st_mode)) {
1008: error("%s is not a regular file", local_path);
1.1 djm 1009: close(local_fd);
1010: return(-1);
1011: }
1012: stat_to_attrib(&sb, &a);
1013:
1014: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1015: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1016: a.perm &= 0777;
1017: if (!pflag)
1018: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1019:
1020: buffer_init(&msg);
1021:
1022: /* Send open request */
1.23 djm 1023: id = conn->msg_id++;
1.1 djm 1024: buffer_put_char(&msg, SSH2_FXP_OPEN);
1025: buffer_put_int(&msg, id);
1026: buffer_put_cstring(&msg, remote_path);
1027: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1028: encode_attrib(&msg, &a);
1.23 djm 1029: send_msg(conn->fd_out, &msg);
1.33 deraadt 1030: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1031:
1032: buffer_clear(&msg);
1033:
1.23 djm 1034: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1035: if (handle == NULL) {
1036: close(local_fd);
1037: buffer_free(&msg);
1038: return(-1);
1039: }
1040:
1.21 djm 1041: startid = ackid = id + 1;
1.23 djm 1042: data = xmalloc(conn->transfer_buflen);
1.20 djm 1043:
1.1 djm 1044: /* Read from local and write to remote */
1045: offset = 0;
1.39 fgsch 1046: if (showprogress)
1047: start_progress_meter(local_path, sb.st_size, &offset);
1048:
1.19 deraadt 1049: for (;;) {
1.1 djm 1050: int len;
1051:
1052: /*
1.51 deraadt 1053: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1054: * thus losing the last block of the file.
1.51 deraadt 1055: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1056: * server to drain.
1.1 djm 1057: */
1.49 djm 1058: if (interrupted)
1059: len = 0;
1060: else do
1.23 djm 1061: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1062: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1063:
1064: if (len == -1)
1065: fatal("Couldn't read from \"%s\": %s", local_path,
1066: strerror(errno));
1.21 djm 1067:
1068: if (len != 0) {
1.22 djm 1069: ack = xmalloc(sizeof(*ack));
1070: ack->id = ++id;
1071: ack->offset = offset;
1072: ack->len = len;
1073: TAILQ_INSERT_TAIL(&acks, ack, tq);
1074:
1.21 djm 1075: buffer_clear(&msg);
1076: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1077: buffer_put_int(&msg, ack->id);
1.21 djm 1078: buffer_put_string(&msg, handle, handle_len);
1079: buffer_put_int64(&msg, offset);
1080: buffer_put_string(&msg, data, len);
1.23 djm 1081: send_msg(conn->fd_out, &msg);
1.33 deraadt 1082: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1083: id, (unsigned long long)offset, len);
1.22 djm 1084: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1085: break;
1086:
1.22 djm 1087: if (ack == NULL)
1088: fatal("Unexpected ACK %u", id);
1089:
1.28 markus 1090: if (id == startid || len == 0 ||
1.23 djm 1091: id - ackid >= conn->num_requests) {
1.32 markus 1092: u_int r_id;
1.31 djm 1093:
1.22 djm 1094: buffer_clear(&msg);
1.23 djm 1095: get_msg(conn->fd_in, &msg);
1.22 djm 1096: type = buffer_get_char(&msg);
1.31 djm 1097: r_id = buffer_get_int(&msg);
1.22 djm 1098:
1099: if (type != SSH2_FXP_STATUS)
1100: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1101: "got %d", SSH2_FXP_STATUS, type);
1102:
1103: status = buffer_get_int(&msg);
1104: debug3("SSH2_FXP_STATUS %d", status);
1105:
1106: /* Find the request in our queue */
1.53 deraadt 1107: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1108: ack != NULL && ack->id != r_id;
1.22 djm 1109: ack = TAILQ_NEXT(ack, tq))
1110: ;
1111: if (ack == NULL)
1.33 deraadt 1112: fatal("Can't find request for ID %u", r_id);
1.22 djm 1113: TAILQ_REMOVE(&acks, ack, tq);
1114:
1.21 djm 1115: if (status != SSH2_FX_OK) {
1116: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1117: remote_path, fx2txt(status));
1.23 djm 1118: do_close(conn, handle, handle_len);
1.21 djm 1119: close(local_fd);
1.42 markus 1120: xfree(data);
1121: xfree(ack);
1.21 djm 1122: goto done;
1123: }
1.33 deraadt 1124: debug3("In write loop, ack for %u %u bytes at %llu",
1.53.2.1! brad 1125: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1126: ++ackid;
1.34 deraadt 1127: xfree(ack);
1.1 djm 1128: }
1129: offset += len;
1130: }
1.39 fgsch 1131: if (showprogress)
1132: stop_progress_meter();
1.20 djm 1133: xfree(data);
1.1 djm 1134:
1135: if (close(local_fd) == -1) {
1136: error("Couldn't close local file \"%s\": %s", local_path,
1137: strerror(errno));
1.23 djm 1138: do_close(conn, handle, handle_len);
1.5 djm 1139: status = -1;
1140: goto done;
1.1 djm 1141: }
1142:
1.10 djm 1143: /* Override umask and utimes if asked */
1144: if (pflag)
1.23 djm 1145: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1146:
1.23 djm 1147: status = do_close(conn, handle, handle_len);
1.5 djm 1148:
1149: done:
1150: xfree(handle);
1151: buffer_free(&msg);
1.23 djm 1152: return(status);
1.1 djm 1153: }
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