Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.60.2.2
1.60.2.2! brad 1: /* $OpenBSD: sftp-client.c,v 1.75 2006/10/22 02:25:50 djm Exp $ */
1.1 djm 2: /*
1.46 djm 3: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 4: *
1.46 djm 5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 djm 8: *
1.46 djm 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 djm 16: */
17:
18: /* XXX: memleaks */
19: /* XXX: signed vs unsigned */
1.23 djm 20: /* XXX: remove all logging, only return status codes */
1.1 djm 21: /* XXX: copy between two remote sites */
22:
1.60 stevesk 23: #include <sys/types.h>
1.60.2.1 brad 24: #include <sys/queue.h>
1.60 stevesk 25: #include <sys/stat.h>
1.60.2.1 brad 26: #include <sys/time.h>
27: #include <sys/param.h>
28: #include <sys/uio.h>
29:
30: #include <errno.h>
31: #include <fcntl.h>
32: #include <signal.h>
33: #include <stdio.h>
34: #include <string.h>
35: #include <unistd.h>
36: #include <stdarg.h>
1.1 djm 37:
38: #include "xmalloc.h"
1.60.2.1 brad 39: #include "buffer.h"
1.1 djm 40: #include "log.h"
41: #include "atomicio.h"
1.39 fgsch 42: #include "progressmeter.h"
1.60.2.1 brad 43: #include "misc.h"
1.1 djm 44:
45: #include "sftp.h"
46: #include "sftp-common.h"
47: #include "sftp-client.h"
48:
1.49 djm 49: extern volatile sig_atomic_t interrupted;
1.39 fgsch 50: extern int showprogress;
51:
1.59 david 52: /* Minimum amount of data to read at a time */
1.21 djm 53: #define MIN_READ_SIZE 512
54:
1.23 djm 55: struct sftp_conn {
56: int fd_in;
57: int fd_out;
58: u_int transfer_buflen;
59: u_int num_requests;
60: u_int version;
61: u_int msg_id;
62: };
1.4 djm 63:
1.17 itojun 64: static void
1.1 djm 65: send_msg(int fd, Buffer *m)
66: {
1.40 djm 67: u_char mlen[4];
1.60.2.1 brad 68: struct iovec iov[2];
1.40 djm 69:
1.58 djm 70: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 71: fatal("Outbound message too long %u", buffer_len(m));
72:
73: /* Send length first */
1.60.2.1 brad 74: put_u32(mlen, buffer_len(m));
75: iov[0].iov_base = mlen;
76: iov[0].iov_len = sizeof(mlen);
77: iov[1].iov_base = buffer_ptr(m);
78: iov[1].iov_len = buffer_len(m);
1.1 djm 79:
1.60.2.1 brad 80: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 81: fatal("Couldn't send packet: %s", strerror(errno));
82:
1.40 djm 83: buffer_clear(m);
1.1 djm 84: }
85:
1.17 itojun 86: static void
1.1 djm 87: get_msg(int fd, Buffer *m)
88: {
1.40 djm 89: u_int msg_len;
1.1 djm 90:
1.40 djm 91: buffer_append_space(m, 4);
1.54 avsm 92: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
93: if (errno == EPIPE)
94: fatal("Connection closed");
95: else
96: fatal("Couldn't read packet: %s", strerror(errno));
97: }
1.1 djm 98:
1.40 djm 99: msg_len = buffer_get_int(m);
1.58 djm 100: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 101: fatal("Received message too long %u", msg_len);
1.1 djm 102:
1.40 djm 103: buffer_append_space(m, msg_len);
1.54 avsm 104: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
105: if (errno == EPIPE)
106: fatal("Connection closed");
107: else
108: fatal("Read packet: %s", strerror(errno));
109: }
1.1 djm 110: }
111:
1.17 itojun 112: static void
1.1 djm 113: send_string_request(int fd, u_int id, u_int code, char *s,
114: u_int len)
115: {
116: Buffer msg;
117:
118: buffer_init(&msg);
119: buffer_put_char(&msg, code);
120: buffer_put_int(&msg, id);
121: buffer_put_string(&msg, s, len);
122: send_msg(fd, &msg);
1.33 deraadt 123: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 124: buffer_free(&msg);
125: }
126:
1.17 itojun 127: static void
1.1 djm 128: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
129: u_int len, Attrib *a)
130: {
131: Buffer msg;
132:
133: buffer_init(&msg);
134: buffer_put_char(&msg, code);
135: buffer_put_int(&msg, id);
136: buffer_put_string(&msg, s, len);
137: encode_attrib(&msg, a);
138: send_msg(fd, &msg);
1.33 deraadt 139: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 140: buffer_free(&msg);
141: }
142:
1.17 itojun 143: static u_int
1.33 deraadt 144: get_status(int fd, u_int expected_id)
1.1 djm 145: {
146: Buffer msg;
147: u_int type, id, status;
148:
149: buffer_init(&msg);
150: get_msg(fd, &msg);
151: type = buffer_get_char(&msg);
152: id = buffer_get_int(&msg);
153:
154: if (id != expected_id)
1.33 deraadt 155: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 156: if (type != SSH2_FXP_STATUS)
1.33 deraadt 157: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 158: SSH2_FXP_STATUS, type);
159:
160: status = buffer_get_int(&msg);
161: buffer_free(&msg);
162:
1.33 deraadt 163: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 164:
165: return(status);
166: }
167:
1.17 itojun 168: static char *
1.1 djm 169: get_handle(int fd, u_int expected_id, u_int *len)
170: {
171: Buffer msg;
172: u_int type, id;
173: char *handle;
174:
175: buffer_init(&msg);
176: get_msg(fd, &msg);
177: type = buffer_get_char(&msg);
178: id = buffer_get_int(&msg);
179:
180: if (id != expected_id)
1.33 deraadt 181: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 182: if (type == SSH2_FXP_STATUS) {
183: int status = buffer_get_int(&msg);
184:
185: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 186: buffer_free(&msg);
1.1 djm 187: return(NULL);
188: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 189: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 190: SSH2_FXP_HANDLE, type);
191:
192: handle = buffer_get_string(&msg, len);
193: buffer_free(&msg);
194:
195: return(handle);
196: }
197:
1.17 itojun 198: static Attrib *
1.14 djm 199: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 200: {
201: Buffer msg;
202: u_int type, id;
203: Attrib *a;
204:
205: buffer_init(&msg);
206: get_msg(fd, &msg);
207:
208: type = buffer_get_char(&msg);
209: id = buffer_get_int(&msg);
210:
1.33 deraadt 211: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 212: if (id != expected_id)
1.33 deraadt 213: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 214: if (type == SSH2_FXP_STATUS) {
215: int status = buffer_get_int(&msg);
216:
1.14 djm 217: if (quiet)
218: debug("Couldn't stat remote file: %s", fx2txt(status));
219: else
220: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 221: buffer_free(&msg);
1.1 djm 222: return(NULL);
223: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 224: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 225: SSH2_FXP_ATTRS, type);
226: }
227: a = decode_attrib(&msg);
228: buffer_free(&msg);
229:
230: return(a);
231: }
232:
1.23 djm 233: struct sftp_conn *
234: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 235: {
1.33 deraadt 236: u_int type;
237: int version;
1.1 djm 238: Buffer msg;
1.23 djm 239: struct sftp_conn *ret;
1.1 djm 240:
241: buffer_init(&msg);
242: buffer_put_char(&msg, SSH2_FXP_INIT);
243: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
244: send_msg(fd_out, &msg);
245:
246: buffer_clear(&msg);
247:
248: get_msg(fd_in, &msg);
249:
1.3 stevesk 250: /* Expecting a VERSION reply */
1.1 djm 251: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 252: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 253: type);
254: buffer_free(&msg);
1.23 djm 255: return(NULL);
1.1 djm 256: }
257: version = buffer_get_int(&msg);
258:
259: debug2("Remote version: %d", version);
260:
261: /* Check for extensions */
262: while (buffer_len(&msg) > 0) {
263: char *name = buffer_get_string(&msg, NULL);
264: char *value = buffer_get_string(&msg, NULL);
265:
266: debug2("Init extension: \"%s\"", name);
267: xfree(name);
268: xfree(value);
269: }
270:
271: buffer_free(&msg);
1.11 djm 272:
1.23 djm 273: ret = xmalloc(sizeof(*ret));
274: ret->fd_in = fd_in;
275: ret->fd_out = fd_out;
276: ret->transfer_buflen = transfer_buflen;
277: ret->num_requests = num_requests;
278: ret->version = version;
279: ret->msg_id = 1;
280:
281: /* Some filexfer v.0 servers don't support large packets */
282: if (version == 0)
1.29 markus 283: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 284:
285: return(ret);
286: }
287:
288: u_int
289: sftp_proto_version(struct sftp_conn *conn)
290: {
291: return(conn->version);
1.1 djm 292: }
293:
294: int
1.23 djm 295: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 296: {
297: u_int id, status;
298: Buffer msg;
299:
300: buffer_init(&msg);
301:
1.23 djm 302: id = conn->msg_id++;
1.1 djm 303: buffer_put_char(&msg, SSH2_FXP_CLOSE);
304: buffer_put_int(&msg, id);
305: buffer_put_string(&msg, handle, handle_len);
1.23 djm 306: send_msg(conn->fd_out, &msg);
1.33 deraadt 307: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 308:
1.23 djm 309: status = get_status(conn->fd_in, id);
1.1 djm 310: if (status != SSH2_FX_OK)
311: error("Couldn't close file: %s", fx2txt(status));
312:
313: buffer_free(&msg);
314:
315: return(status);
316: }
317:
1.12 djm 318:
1.17 itojun 319: static int
1.23 djm 320: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 321: SFTP_DIRENT ***dir)
1.1 djm 322: {
323: Buffer msg;
1.55 djm 324: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 325: char *handle;
326:
1.23 djm 327: id = conn->msg_id++;
1.1 djm 328:
329: buffer_init(&msg);
330: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
331: buffer_put_int(&msg, id);
332: buffer_put_cstring(&msg, path);
1.23 djm 333: send_msg(conn->fd_out, &msg);
1.1 djm 334:
335: buffer_clear(&msg);
336:
1.23 djm 337: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 338: if (handle == NULL)
339: return(-1);
340:
1.12 djm 341: if (dir) {
342: ents = 0;
343: *dir = xmalloc(sizeof(**dir));
344: (*dir)[0] = NULL;
345: }
346:
1.49 djm 347: for (; !interrupted;) {
1.23 djm 348: id = expected_id = conn->msg_id++;
1.1 djm 349:
1.33 deraadt 350: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 351:
352: buffer_clear(&msg);
353: buffer_put_char(&msg, SSH2_FXP_READDIR);
354: buffer_put_int(&msg, id);
355: buffer_put_string(&msg, handle, handle_len);
1.23 djm 356: send_msg(conn->fd_out, &msg);
1.1 djm 357:
358: buffer_clear(&msg);
359:
1.23 djm 360: get_msg(conn->fd_in, &msg);
1.1 djm 361:
362: type = buffer_get_char(&msg);
363: id = buffer_get_int(&msg);
364:
1.33 deraadt 365: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 366:
367: if (id != expected_id)
1.33 deraadt 368: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 369:
370: if (type == SSH2_FXP_STATUS) {
371: int status = buffer_get_int(&msg);
372:
373: debug3("Received SSH2_FXP_STATUS %d", status);
374:
375: if (status == SSH2_FX_EOF) {
376: break;
377: } else {
378: error("Couldn't read directory: %s",
379: fx2txt(status));
1.23 djm 380: do_close(conn, handle, handle_len);
1.42 markus 381: xfree(handle);
1.9 djm 382: return(status);
1.1 djm 383: }
384: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 385: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 386: SSH2_FXP_NAME, type);
387:
388: count = buffer_get_int(&msg);
1.7 markus 389: if (count == 0)
390: break;
1.8 stevesk 391: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 392: for (i = 0; i < count; i++) {
1.1 djm 393: char *filename, *longname;
394: Attrib *a;
395:
396: filename = buffer_get_string(&msg, NULL);
397: longname = buffer_get_string(&msg, NULL);
398: a = decode_attrib(&msg);
399:
1.12 djm 400: if (printflag)
401: printf("%s\n", longname);
402:
403: if (dir) {
1.60.2.1 brad 404: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 405: (*dir)[ents] = xmalloc(sizeof(***dir));
406: (*dir)[ents]->filename = xstrdup(filename);
407: (*dir)[ents]->longname = xstrdup(longname);
408: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
409: (*dir)[++ents] = NULL;
410: }
1.1 djm 411:
412: xfree(filename);
413: xfree(longname);
414: }
415: }
416:
417: buffer_free(&msg);
1.23 djm 418: do_close(conn, handle, handle_len);
1.1 djm 419: xfree(handle);
420:
1.49 djm 421: /* Don't return partial matches on interrupt */
422: if (interrupted && dir != NULL && *dir != NULL) {
423: free_sftp_dirents(*dir);
424: *dir = xmalloc(sizeof(**dir));
425: **dir = NULL;
426: }
427:
1.1 djm 428: return(0);
1.12 djm 429: }
430:
431: int
1.23 djm 432: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 433: {
1.23 djm 434: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 435: }
436:
437: void free_sftp_dirents(SFTP_DIRENT **s)
438: {
439: int i;
1.19 deraadt 440:
441: for (i = 0; s[i]; i++) {
1.12 djm 442: xfree(s[i]->filename);
443: xfree(s[i]->longname);
444: xfree(s[i]);
445: }
446: xfree(s);
447: }
448:
449: int
1.23 djm 450: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 451: {
452: u_int status, id;
453:
454: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
455:
1.23 djm 456: id = conn->msg_id++;
1.28 markus 457: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 458: strlen(path));
459: status = get_status(conn->fd_in, id);
1.1 djm 460: if (status != SSH2_FX_OK)
461: error("Couldn't delete file: %s", fx2txt(status));
462: return(status);
463: }
464:
465: int
1.23 djm 466: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 467: {
468: u_int status, id;
469:
1.23 djm 470: id = conn->msg_id++;
471: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 472: strlen(path), a);
473:
1.23 djm 474: status = get_status(conn->fd_in, id);
1.1 djm 475: if (status != SSH2_FX_OK)
476: error("Couldn't create directory: %s", fx2txt(status));
477:
478: return(status);
479: }
480:
481: int
1.23 djm 482: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 483: {
484: u_int status, id;
485:
1.23 djm 486: id = conn->msg_id++;
487: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
488: strlen(path));
1.1 djm 489:
1.23 djm 490: status = get_status(conn->fd_in, id);
1.1 djm 491: if (status != SSH2_FX_OK)
492: error("Couldn't remove directory: %s", fx2txt(status));
493:
494: return(status);
495: }
496:
497: Attrib *
1.23 djm 498: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 499: {
500: u_int id;
501:
1.23 djm 502: id = conn->msg_id++;
503:
1.28 markus 504: send_string_request(conn->fd_out, id,
505: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 506: path, strlen(path));
507:
508: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 509: }
510:
511: Attrib *
1.23 djm 512: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 513: {
514: u_int id;
515:
1.23 djm 516: if (conn->version == 0) {
517: if (quiet)
518: debug("Server version does not support lstat operation");
519: else
1.43 itojun 520: logit("Server version does not support lstat operation");
1.30 markus 521: return(do_stat(conn, path, quiet));
1.23 djm 522: }
523:
524: id = conn->msg_id++;
525: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
526: strlen(path));
527:
528: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 529: }
530:
531: Attrib *
1.23 djm 532: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 533: {
534: u_int id;
535:
1.23 djm 536: id = conn->msg_id++;
537: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
538: handle_len);
539:
540: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 541: }
542:
543: int
1.23 djm 544: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 545: {
546: u_int status, id;
547:
1.23 djm 548: id = conn->msg_id++;
549: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 550: strlen(path), a);
551:
1.23 djm 552: status = get_status(conn->fd_in, id);
1.1 djm 553: if (status != SSH2_FX_OK)
554: error("Couldn't setstat on \"%s\": %s", path,
555: fx2txt(status));
556:
557: return(status);
558: }
559:
560: int
1.23 djm 561: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 562: Attrib *a)
563: {
564: u_int status, id;
565:
1.23 djm 566: id = conn->msg_id++;
567: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 568: handle_len, a);
569:
1.23 djm 570: status = get_status(conn->fd_in, id);
1.1 djm 571: if (status != SSH2_FX_OK)
572: error("Couldn't fsetstat: %s", fx2txt(status));
573:
574: return(status);
575: }
576:
577: char *
1.23 djm 578: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 579: {
580: Buffer msg;
581: u_int type, expected_id, count, id;
582: char *filename, *longname;
583: Attrib *a;
584:
1.23 djm 585: expected_id = id = conn->msg_id++;
586: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
587: strlen(path));
1.1 djm 588:
589: buffer_init(&msg);
590:
1.23 djm 591: get_msg(conn->fd_in, &msg);
1.1 djm 592: type = buffer_get_char(&msg);
593: id = buffer_get_int(&msg);
594:
595: if (id != expected_id)
1.33 deraadt 596: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 597:
598: if (type == SSH2_FXP_STATUS) {
599: u_int status = buffer_get_int(&msg);
600:
601: error("Couldn't canonicalise: %s", fx2txt(status));
602: return(NULL);
603: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 604: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 605: SSH2_FXP_NAME, type);
606:
607: count = buffer_get_int(&msg);
608: if (count != 1)
609: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
610:
611: filename = buffer_get_string(&msg, NULL);
612: longname = buffer_get_string(&msg, NULL);
613: a = decode_attrib(&msg);
614:
615: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
616:
617: xfree(longname);
618:
619: buffer_free(&msg);
620:
621: return(filename);
622: }
623:
624: int
1.23 djm 625: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 626: {
627: Buffer msg;
628: u_int status, id;
629:
630: buffer_init(&msg);
631:
632: /* Send rename request */
1.23 djm 633: id = conn->msg_id++;
1.1 djm 634: buffer_put_char(&msg, SSH2_FXP_RENAME);
635: buffer_put_int(&msg, id);
636: buffer_put_cstring(&msg, oldpath);
637: buffer_put_cstring(&msg, newpath);
1.23 djm 638: send_msg(conn->fd_out, &msg);
1.1 djm 639: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
640: newpath);
641: buffer_free(&msg);
642:
1.23 djm 643: status = get_status(conn->fd_in, id);
1.1 djm 644: if (status != SSH2_FX_OK)
1.23 djm 645: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
646: newpath, fx2txt(status));
1.1 djm 647:
648: return(status);
1.11 djm 649: }
650:
651: int
1.23 djm 652: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 653: {
654: Buffer msg;
655: u_int status, id;
656:
1.23 djm 657: if (conn->version < 3) {
658: error("This server does not support the symlink operation");
659: return(SSH2_FX_OP_UNSUPPORTED);
660: }
661:
1.11 djm 662: buffer_init(&msg);
663:
1.48 djm 664: /* Send symlink request */
1.23 djm 665: id = conn->msg_id++;
1.11 djm 666: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
667: buffer_put_int(&msg, id);
668: buffer_put_cstring(&msg, oldpath);
669: buffer_put_cstring(&msg, newpath);
1.23 djm 670: send_msg(conn->fd_out, &msg);
1.11 djm 671: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
672: newpath);
673: buffer_free(&msg);
674:
1.23 djm 675: status = get_status(conn->fd_in, id);
1.11 djm 676: if (status != SSH2_FX_OK)
1.36 markus 677: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 678: newpath, fx2txt(status));
1.11 djm 679:
680: return(status);
681: }
682:
683: char *
1.23 djm 684: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 685: {
686: Buffer msg;
687: u_int type, expected_id, count, id;
688: char *filename, *longname;
689: Attrib *a;
690:
1.23 djm 691: expected_id = id = conn->msg_id++;
692: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
693: strlen(path));
1.11 djm 694:
695: buffer_init(&msg);
696:
1.23 djm 697: get_msg(conn->fd_in, &msg);
1.11 djm 698: type = buffer_get_char(&msg);
699: id = buffer_get_int(&msg);
700:
701: if (id != expected_id)
1.33 deraadt 702: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 703:
704: if (type == SSH2_FXP_STATUS) {
705: u_int status = buffer_get_int(&msg);
706:
707: error("Couldn't readlink: %s", fx2txt(status));
708: return(NULL);
709: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 710: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 711: SSH2_FXP_NAME, type);
712:
713: count = buffer_get_int(&msg);
714: if (count != 1)
715: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
716:
717: filename = buffer_get_string(&msg, NULL);
718: longname = buffer_get_string(&msg, NULL);
719: a = decode_attrib(&msg);
720:
721: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
722:
723: xfree(longname);
724:
725: buffer_free(&msg);
726:
727: return(filename);
1.1 djm 728: }
729:
1.21 djm 730: static void
731: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
732: char *handle, u_int handle_len)
733: {
734: Buffer msg;
1.28 markus 735:
1.21 djm 736: buffer_init(&msg);
737: buffer_clear(&msg);
738: buffer_put_char(&msg, SSH2_FXP_READ);
739: buffer_put_int(&msg, id);
740: buffer_put_string(&msg, handle, handle_len);
741: buffer_put_int64(&msg, offset);
742: buffer_put_int(&msg, len);
743: send_msg(fd_out, &msg);
744: buffer_free(&msg);
1.28 markus 745: }
1.21 djm 746:
1.1 djm 747: int
1.23 djm 748: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
749: int pflag)
1.1 djm 750: {
1.21 djm 751: Attrib junk, *a;
752: Buffer msg;
1.1 djm 753: char *handle;
1.57 dtucker 754: int local_fd, status = 0, write_error;
1.21 djm 755: int read_error, write_errno;
756: u_int64_t offset, size;
1.55 djm 757: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 758: off_t progress_counter;
1.21 djm 759: struct request {
760: u_int id;
761: u_int len;
762: u_int64_t offset;
1.28 markus 763: TAILQ_ENTRY(request) tq;
1.21 djm 764: };
765: TAILQ_HEAD(reqhead, request) requests;
766: struct request *req;
767:
768: TAILQ_INIT(&requests);
1.1 djm 769:
1.23 djm 770: a = do_stat(conn, remote_path, 0);
1.1 djm 771: if (a == NULL)
772: return(-1);
773:
774: /* XXX: should we preserve set[ug]id? */
775: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 776: mode = a->perm & 0777;
1.1 djm 777: else
778: mode = 0666;
779:
1.14 djm 780: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 781: (!S_ISREG(a->perm))) {
782: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 783: return(-1);
784: }
785:
1.21 djm 786: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
787: size = a->size;
788: else
789: size = 0;
790:
1.23 djm 791: buflen = conn->transfer_buflen;
1.1 djm 792: buffer_init(&msg);
793:
794: /* Send open request */
1.23 djm 795: id = conn->msg_id++;
1.1 djm 796: buffer_put_char(&msg, SSH2_FXP_OPEN);
797: buffer_put_int(&msg, id);
798: buffer_put_cstring(&msg, remote_path);
799: buffer_put_int(&msg, SSH2_FXF_READ);
800: attrib_clear(&junk); /* Send empty attributes */
801: encode_attrib(&msg, &junk);
1.23 djm 802: send_msg(conn->fd_out, &msg);
1.33 deraadt 803: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 804:
1.23 djm 805: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 806: if (handle == NULL) {
807: buffer_free(&msg);
808: return(-1);
809: }
810:
1.45 djm 811: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 812: mode | S_IWRITE);
1.23 djm 813: if (local_fd == -1) {
814: error("Couldn't open local file \"%s\" for writing: %s",
815: local_path, strerror(errno));
1.24 markus 816: buffer_free(&msg);
817: xfree(handle);
1.23 djm 818: return(-1);
819: }
820:
1.1 djm 821: /* Read from remote and write to local */
1.21 djm 822: write_error = read_error = write_errno = num_req = offset = 0;
823: max_req = 1;
1.39 fgsch 824: progress_counter = 0;
825:
1.47 djm 826: if (showprogress && size != 0)
827: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 828:
1.21 djm 829: while (num_req > 0 || max_req > 0) {
830: char *data;
1.1 djm 831: u_int len;
832:
1.49 djm 833: /*
1.51 deraadt 834: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 835: * allow outstanding requests to drain gracefully
836: */
837: if (interrupted) {
838: if (num_req == 0) /* If we haven't started yet... */
839: break;
840: max_req = 0;
841: }
842:
1.21 djm 843: /* Send some more requests */
844: while (num_req < max_req) {
1.28 markus 845: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 846: (unsigned long long)offset,
847: (unsigned long long)offset + buflen - 1,
848: num_req, max_req);
1.21 djm 849: req = xmalloc(sizeof(*req));
1.23 djm 850: req->id = conn->msg_id++;
1.21 djm 851: req->len = buflen;
852: req->offset = offset;
853: offset += buflen;
854: num_req++;
855: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 856: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 857: req->len, handle, handle_len);
858: }
1.1 djm 859:
860: buffer_clear(&msg);
1.23 djm 861: get_msg(conn->fd_in, &msg);
1.1 djm 862: type = buffer_get_char(&msg);
863: id = buffer_get_int(&msg);
1.33 deraadt 864: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 865:
866: /* Find the request in our queue */
1.53 deraadt 867: for (req = TAILQ_FIRST(&requests);
1.21 djm 868: req != NULL && req->id != id;
869: req = TAILQ_NEXT(req, tq))
870: ;
871: if (req == NULL)
872: fatal("Unexpected reply %u", id);
873:
874: switch (type) {
875: case SSH2_FXP_STATUS:
1.5 djm 876: status = buffer_get_int(&msg);
1.21 djm 877: if (status != SSH2_FX_EOF)
878: read_error = 1;
879: max_req = 0;
880: TAILQ_REMOVE(&requests, req, tq);
881: xfree(req);
882: num_req--;
883: break;
884: case SSH2_FXP_DATA:
885: data = buffer_get_string(&msg, &len);
1.26 itojun 886: debug3("Received data %llu -> %llu",
1.28 markus 887: (unsigned long long)req->offset,
1.26 itojun 888: (unsigned long long)req->offset + len - 1);
1.21 djm 889: if (len > req->len)
890: fatal("Received more data than asked for "
1.37 deraadt 891: "%u > %u", len, req->len);
1.21 djm 892: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 893: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 894: !write_error) {
895: write_errno = errno;
896: write_error = 1;
897: max_req = 0;
898: }
1.39 fgsch 899: progress_counter += len;
1.21 djm 900: xfree(data);
1.1 djm 901:
1.21 djm 902: if (len == req->len) {
903: TAILQ_REMOVE(&requests, req, tq);
904: xfree(req);
905: num_req--;
906: } else {
907: /* Resend the request for the missing data */
908: debug3("Short data block, re-requesting "
1.26 itojun 909: "%llu -> %llu (%2d)",
1.28 markus 910: (unsigned long long)req->offset + len,
1.27 itojun 911: (unsigned long long)req->offset +
912: req->len - 1, num_req);
1.23 djm 913: req->id = conn->msg_id++;
1.21 djm 914: req->len -= len;
915: req->offset += len;
1.28 markus 916: send_read_request(conn->fd_out, req->id,
1.23 djm 917: req->offset, req->len, handle, handle_len);
1.21 djm 918: /* Reduce the request size */
919: if (len < buflen)
920: buflen = MAX(MIN_READ_SIZE, len);
921: }
922: if (max_req > 0) { /* max_req = 0 iff EOF received */
923: if (size > 0 && offset > size) {
924: /* Only one request at a time
925: * after the expected EOF */
926: debug3("Finish at %llu (%2d)",
1.26 itojun 927: (unsigned long long)offset,
928: num_req);
1.21 djm 929: max_req = 1;
1.49 djm 930: } else if (max_req <= conn->num_requests) {
1.21 djm 931: ++max_req;
932: }
1.1 djm 933: }
1.21 djm 934: break;
935: default:
1.33 deraadt 936: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 937: SSH2_FXP_DATA, type);
938: }
1.21 djm 939: }
1.1 djm 940:
1.39 fgsch 941: if (showprogress && size)
942: stop_progress_meter();
943:
1.21 djm 944: /* Sanity check */
945: if (TAILQ_FIRST(&requests) != NULL)
946: fatal("Transfer complete, but requests still in queue");
947:
948: if (read_error) {
1.28 markus 949: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 950: remote_path, fx2txt(status));
1.23 djm 951: do_close(conn, handle, handle_len);
1.21 djm 952: } else if (write_error) {
953: error("Couldn't write to \"%s\": %s", local_path,
954: strerror(write_errno));
955: status = -1;
1.23 djm 956: do_close(conn, handle, handle_len);
1.21 djm 957: } else {
1.23 djm 958: status = do_close(conn, handle, handle_len);
1.21 djm 959:
960: /* Override umask and utimes if asked */
961: if (pflag && fchmod(local_fd, mode) == -1)
962: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 963: strerror(errno));
1.21 djm 964: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
965: struct timeval tv[2];
966: tv[0].tv_sec = a->atime;
967: tv[1].tv_sec = a->mtime;
968: tv[0].tv_usec = tv[1].tv_usec = 0;
969: if (utimes(local_path, tv) == -1)
970: error("Can't set times on \"%s\": %s",
1.37 deraadt 971: local_path, strerror(errno));
1.1 djm 972: }
1.10 djm 973: }
1.5 djm 974: close(local_fd);
975: buffer_free(&msg);
1.1 djm 976: xfree(handle);
1.23 djm 977:
978: return(status);
1.1 djm 979: }
980:
981: int
1.23 djm 982: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
983: int pflag)
1.1 djm 984: {
1.20 djm 985: int local_fd, status;
1.22 djm 986: u_int handle_len, id, type;
1.1 djm 987: u_int64_t offset;
1.20 djm 988: char *handle, *data;
1.1 djm 989: Buffer msg;
990: struct stat sb;
991: Attrib a;
1.21 djm 992: u_int32_t startid;
993: u_int32_t ackid;
1.22 djm 994: struct outstanding_ack {
995: u_int id;
996: u_int len;
997: u_int64_t offset;
1.28 markus 998: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 999: };
1000: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 1001: struct outstanding_ack *ack = NULL;
1.22 djm 1002:
1003: TAILQ_INIT(&acks);
1.1 djm 1004:
1005: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1006: error("Couldn't open local file \"%s\" for reading: %s",
1007: local_path, strerror(errno));
1008: return(-1);
1009: }
1010: if (fstat(local_fd, &sb) == -1) {
1011: error("Couldn't fstat local file \"%s\": %s",
1012: local_path, strerror(errno));
1.41 djm 1013: close(local_fd);
1014: return(-1);
1015: }
1016: if (!S_ISREG(sb.st_mode)) {
1017: error("%s is not a regular file", local_path);
1.1 djm 1018: close(local_fd);
1019: return(-1);
1020: }
1021: stat_to_attrib(&sb, &a);
1022:
1023: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1024: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1025: a.perm &= 0777;
1026: if (!pflag)
1027: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1028:
1029: buffer_init(&msg);
1030:
1031: /* Send open request */
1.23 djm 1032: id = conn->msg_id++;
1.1 djm 1033: buffer_put_char(&msg, SSH2_FXP_OPEN);
1034: buffer_put_int(&msg, id);
1035: buffer_put_cstring(&msg, remote_path);
1036: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1037: encode_attrib(&msg, &a);
1.23 djm 1038: send_msg(conn->fd_out, &msg);
1.33 deraadt 1039: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1040:
1041: buffer_clear(&msg);
1042:
1.23 djm 1043: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1044: if (handle == NULL) {
1045: close(local_fd);
1046: buffer_free(&msg);
1047: return(-1);
1048: }
1049:
1.21 djm 1050: startid = ackid = id + 1;
1.23 djm 1051: data = xmalloc(conn->transfer_buflen);
1.20 djm 1052:
1.1 djm 1053: /* Read from local and write to remote */
1054: offset = 0;
1.39 fgsch 1055: if (showprogress)
1056: start_progress_meter(local_path, sb.st_size, &offset);
1057:
1.19 deraadt 1058: for (;;) {
1.1 djm 1059: int len;
1060:
1061: /*
1.51 deraadt 1062: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1063: * thus losing the last block of the file.
1.51 deraadt 1064: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1065: * server to drain.
1.1 djm 1066: */
1.49 djm 1067: if (interrupted)
1068: len = 0;
1069: else do
1.23 djm 1070: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1071: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1072:
1073: if (len == -1)
1074: fatal("Couldn't read from \"%s\": %s", local_path,
1075: strerror(errno));
1.21 djm 1076:
1077: if (len != 0) {
1.22 djm 1078: ack = xmalloc(sizeof(*ack));
1079: ack->id = ++id;
1080: ack->offset = offset;
1081: ack->len = len;
1082: TAILQ_INSERT_TAIL(&acks, ack, tq);
1083:
1.21 djm 1084: buffer_clear(&msg);
1085: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1086: buffer_put_int(&msg, ack->id);
1.21 djm 1087: buffer_put_string(&msg, handle, handle_len);
1088: buffer_put_int64(&msg, offset);
1089: buffer_put_string(&msg, data, len);
1.23 djm 1090: send_msg(conn->fd_out, &msg);
1.33 deraadt 1091: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1092: id, (unsigned long long)offset, len);
1.22 djm 1093: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1094: break;
1095:
1.22 djm 1096: if (ack == NULL)
1097: fatal("Unexpected ACK %u", id);
1098:
1.28 markus 1099: if (id == startid || len == 0 ||
1.23 djm 1100: id - ackid >= conn->num_requests) {
1.32 markus 1101: u_int r_id;
1.31 djm 1102:
1.22 djm 1103: buffer_clear(&msg);
1.23 djm 1104: get_msg(conn->fd_in, &msg);
1.22 djm 1105: type = buffer_get_char(&msg);
1.31 djm 1106: r_id = buffer_get_int(&msg);
1.22 djm 1107:
1108: if (type != SSH2_FXP_STATUS)
1109: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1110: "got %d", SSH2_FXP_STATUS, type);
1111:
1112: status = buffer_get_int(&msg);
1113: debug3("SSH2_FXP_STATUS %d", status);
1114:
1115: /* Find the request in our queue */
1.53 deraadt 1116: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1117: ack != NULL && ack->id != r_id;
1.22 djm 1118: ack = TAILQ_NEXT(ack, tq))
1119: ;
1120: if (ack == NULL)
1.33 deraadt 1121: fatal("Can't find request for ID %u", r_id);
1.22 djm 1122: TAILQ_REMOVE(&acks, ack, tq);
1123:
1.21 djm 1124: if (status != SSH2_FX_OK) {
1125: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1126: remote_path, fx2txt(status));
1.60.2.2! brad 1127: if (showprogress)
! 1128: stop_progress_meter();
1.23 djm 1129: do_close(conn, handle, handle_len);
1.21 djm 1130: close(local_fd);
1.42 markus 1131: xfree(data);
1132: xfree(ack);
1.21 djm 1133: goto done;
1134: }
1.33 deraadt 1135: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1136: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1137: ++ackid;
1.34 deraadt 1138: xfree(ack);
1.1 djm 1139: }
1140: offset += len;
1141: }
1.39 fgsch 1142: if (showprogress)
1143: stop_progress_meter();
1.20 djm 1144: xfree(data);
1.1 djm 1145:
1146: if (close(local_fd) == -1) {
1147: error("Couldn't close local file \"%s\": %s", local_path,
1148: strerror(errno));
1.23 djm 1149: do_close(conn, handle, handle_len);
1.5 djm 1150: status = -1;
1151: goto done;
1.1 djm 1152: }
1153:
1.10 djm 1154: /* Override umask and utimes if asked */
1155: if (pflag)
1.23 djm 1156: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1157:
1.23 djm 1158: status = do_close(conn, handle, handle_len);
1.5 djm 1159:
1160: done:
1161: xfree(handle);
1162: buffer_free(&msg);
1.23 djm 1163: return(status);
1.1 djm 1164: }
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