Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.78
1.78 ! chl 1: /* $OpenBSD: sftp-client.c,v 1.77 2007/09/16 00:55:52 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:
1.74 deraadt 23: #include <sys/types.h>
1.21 djm 24: #include <sys/queue.h>
1.60 stevesk 25: #include <sys/stat.h>
1.71 stevesk 26: #include <sys/time.h>
1.72 stevesk 27: #include <sys/param.h>
1.74 deraadt 28: #include <sys/uio.h>
1.66 stevesk 29:
1.67 stevesk 30: #include <errno.h>
1.66 stevesk 31: #include <fcntl.h>
1.70 stevesk 32: #include <signal.h>
1.73 stevesk 33: #include <stdio.h>
1.69 stevesk 34: #include <string.h>
1.68 stevesk 35: #include <unistd.h>
1.74 deraadt 36: #include <stdarg.h>
1.1 djm 37:
1.74 deraadt 38: #include "xmalloc.h"
1.1 djm 39: #include "buffer.h"
40: #include "log.h"
41: #include "atomicio.h"
1.39 fgsch 42: #include "progressmeter.h"
1.64 djm 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];
1.65 djm 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 */
1.64 djm 74: put_u32(mlen, buffer_len(m));
1.65 djm 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);
1.74 deraadt 79:
1.65 djm 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) {
1.62 djm 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:
1.78 ! chl 531: #ifdef notyet
1.1 djm 532: Attrib *
1.23 djm 533: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 534: {
535: u_int id;
536:
1.23 djm 537: id = conn->msg_id++;
538: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
539: handle_len);
540:
541: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 542: }
1.78 ! chl 543: #endif
1.1 djm 544:
545: int
1.23 djm 546: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 547: {
548: u_int status, id;
549:
1.23 djm 550: id = conn->msg_id++;
551: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 552: strlen(path), a);
553:
1.23 djm 554: status = get_status(conn->fd_in, id);
1.1 djm 555: if (status != SSH2_FX_OK)
556: error("Couldn't setstat on \"%s\": %s", path,
557: fx2txt(status));
558:
559: return(status);
560: }
561:
562: int
1.23 djm 563: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 564: Attrib *a)
565: {
566: u_int status, id;
567:
1.23 djm 568: id = conn->msg_id++;
569: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 570: handle_len, a);
571:
1.23 djm 572: status = get_status(conn->fd_in, id);
1.1 djm 573: if (status != SSH2_FX_OK)
574: error("Couldn't fsetstat: %s", fx2txt(status));
575:
576: return(status);
577: }
578:
579: char *
1.23 djm 580: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 581: {
582: Buffer msg;
583: u_int type, expected_id, count, id;
584: char *filename, *longname;
585: Attrib *a;
586:
1.23 djm 587: expected_id = id = conn->msg_id++;
588: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
589: strlen(path));
1.1 djm 590:
591: buffer_init(&msg);
592:
1.23 djm 593: get_msg(conn->fd_in, &msg);
1.1 djm 594: type = buffer_get_char(&msg);
595: id = buffer_get_int(&msg);
596:
597: if (id != expected_id)
1.33 deraadt 598: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 599:
600: if (type == SSH2_FXP_STATUS) {
601: u_int status = buffer_get_int(&msg);
602:
603: error("Couldn't canonicalise: %s", fx2txt(status));
604: return(NULL);
605: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 606: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 607: SSH2_FXP_NAME, type);
608:
609: count = buffer_get_int(&msg);
610: if (count != 1)
611: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
612:
613: filename = buffer_get_string(&msg, NULL);
614: longname = buffer_get_string(&msg, NULL);
615: a = decode_attrib(&msg);
616:
617: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
618:
619: xfree(longname);
620:
621: buffer_free(&msg);
622:
623: return(filename);
624: }
625:
626: int
1.23 djm 627: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 628: {
629: Buffer msg;
630: u_int status, id;
631:
632: buffer_init(&msg);
633:
634: /* Send rename request */
1.23 djm 635: id = conn->msg_id++;
1.1 djm 636: buffer_put_char(&msg, SSH2_FXP_RENAME);
637: buffer_put_int(&msg, id);
638: buffer_put_cstring(&msg, oldpath);
639: buffer_put_cstring(&msg, newpath);
1.23 djm 640: send_msg(conn->fd_out, &msg);
1.1 djm 641: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
642: newpath);
643: buffer_free(&msg);
644:
1.23 djm 645: status = get_status(conn->fd_in, id);
1.1 djm 646: if (status != SSH2_FX_OK)
1.23 djm 647: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
648: newpath, fx2txt(status));
1.1 djm 649:
650: return(status);
1.11 djm 651: }
652:
653: int
1.23 djm 654: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 655: {
656: Buffer msg;
657: u_int status, id;
658:
1.23 djm 659: if (conn->version < 3) {
660: error("This server does not support the symlink operation");
661: return(SSH2_FX_OP_UNSUPPORTED);
662: }
663:
1.11 djm 664: buffer_init(&msg);
665:
1.48 djm 666: /* Send symlink request */
1.23 djm 667: id = conn->msg_id++;
1.11 djm 668: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
669: buffer_put_int(&msg, id);
670: buffer_put_cstring(&msg, oldpath);
671: buffer_put_cstring(&msg, newpath);
1.23 djm 672: send_msg(conn->fd_out, &msg);
1.11 djm 673: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
674: newpath);
675: buffer_free(&msg);
676:
1.23 djm 677: status = get_status(conn->fd_in, id);
1.11 djm 678: if (status != SSH2_FX_OK)
1.36 markus 679: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 680: newpath, fx2txt(status));
1.11 djm 681:
682: return(status);
683: }
684:
1.78 ! chl 685: #ifdef notyet
1.11 djm 686: char *
1.23 djm 687: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 688: {
689: Buffer msg;
690: u_int type, expected_id, count, id;
691: char *filename, *longname;
692: Attrib *a;
693:
1.23 djm 694: expected_id = id = conn->msg_id++;
695: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
696: strlen(path));
1.11 djm 697:
698: buffer_init(&msg);
699:
1.23 djm 700: get_msg(conn->fd_in, &msg);
1.11 djm 701: type = buffer_get_char(&msg);
702: id = buffer_get_int(&msg);
703:
704: if (id != expected_id)
1.33 deraadt 705: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 706:
707: if (type == SSH2_FXP_STATUS) {
708: u_int status = buffer_get_int(&msg);
709:
710: error("Couldn't readlink: %s", fx2txt(status));
711: return(NULL);
712: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 713: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 714: SSH2_FXP_NAME, type);
715:
716: count = buffer_get_int(&msg);
717: if (count != 1)
718: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
719:
720: filename = buffer_get_string(&msg, NULL);
721: longname = buffer_get_string(&msg, NULL);
722: a = decode_attrib(&msg);
723:
724: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
725:
726: xfree(longname);
727:
728: buffer_free(&msg);
729:
730: return(filename);
1.1 djm 731: }
1.78 ! chl 732: #endif
1.1 djm 733:
1.21 djm 734: static void
735: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
736: char *handle, u_int handle_len)
737: {
738: Buffer msg;
1.28 markus 739:
1.21 djm 740: buffer_init(&msg);
741: buffer_clear(&msg);
742: buffer_put_char(&msg, SSH2_FXP_READ);
743: buffer_put_int(&msg, id);
744: buffer_put_string(&msg, handle, handle_len);
745: buffer_put_int64(&msg, offset);
746: buffer_put_int(&msg, len);
747: send_msg(fd_out, &msg);
748: buffer_free(&msg);
1.28 markus 749: }
1.21 djm 750:
1.1 djm 751: int
1.23 djm 752: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
753: int pflag)
1.1 djm 754: {
1.21 djm 755: Attrib junk, *a;
756: Buffer msg;
1.1 djm 757: char *handle;
1.57 dtucker 758: int local_fd, status = 0, write_error;
1.21 djm 759: int read_error, write_errno;
760: u_int64_t offset, size;
1.55 djm 761: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 762: off_t progress_counter;
1.21 djm 763: struct request {
764: u_int id;
765: u_int len;
766: u_int64_t offset;
1.28 markus 767: TAILQ_ENTRY(request) tq;
1.21 djm 768: };
769: TAILQ_HEAD(reqhead, request) requests;
770: struct request *req;
771:
772: TAILQ_INIT(&requests);
1.1 djm 773:
1.23 djm 774: a = do_stat(conn, remote_path, 0);
1.1 djm 775: if (a == NULL)
776: return(-1);
777:
778: /* XXX: should we preserve set[ug]id? */
779: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 780: mode = a->perm & 0777;
1.1 djm 781: else
782: mode = 0666;
783:
1.14 djm 784: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 785: (!S_ISREG(a->perm))) {
786: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 787: return(-1);
788: }
789:
1.21 djm 790: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
791: size = a->size;
792: else
793: size = 0;
794:
1.23 djm 795: buflen = conn->transfer_buflen;
1.1 djm 796: buffer_init(&msg);
797:
798: /* Send open request */
1.23 djm 799: id = conn->msg_id++;
1.1 djm 800: buffer_put_char(&msg, SSH2_FXP_OPEN);
801: buffer_put_int(&msg, id);
802: buffer_put_cstring(&msg, remote_path);
803: buffer_put_int(&msg, SSH2_FXF_READ);
804: attrib_clear(&junk); /* Send empty attributes */
805: encode_attrib(&msg, &junk);
1.23 djm 806: send_msg(conn->fd_out, &msg);
1.33 deraadt 807: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 808:
1.23 djm 809: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 810: if (handle == NULL) {
811: buffer_free(&msg);
812: return(-1);
813: }
814:
1.45 djm 815: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 816: mode | S_IWRITE);
1.23 djm 817: if (local_fd == -1) {
818: error("Couldn't open local file \"%s\" for writing: %s",
819: local_path, strerror(errno));
1.24 markus 820: buffer_free(&msg);
821: xfree(handle);
1.23 djm 822: return(-1);
823: }
824:
1.1 djm 825: /* Read from remote and write to local */
1.21 djm 826: write_error = read_error = write_errno = num_req = offset = 0;
827: max_req = 1;
1.39 fgsch 828: progress_counter = 0;
829:
1.47 djm 830: if (showprogress && size != 0)
831: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 832:
1.21 djm 833: while (num_req > 0 || max_req > 0) {
834: char *data;
1.1 djm 835: u_int len;
836:
1.49 djm 837: /*
1.51 deraadt 838: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 839: * allow outstanding requests to drain gracefully
840: */
841: if (interrupted) {
842: if (num_req == 0) /* If we haven't started yet... */
843: break;
844: max_req = 0;
845: }
846:
1.21 djm 847: /* Send some more requests */
848: while (num_req < max_req) {
1.28 markus 849: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 850: (unsigned long long)offset,
851: (unsigned long long)offset + buflen - 1,
852: num_req, max_req);
1.21 djm 853: req = xmalloc(sizeof(*req));
1.23 djm 854: req->id = conn->msg_id++;
1.21 djm 855: req->len = buflen;
856: req->offset = offset;
857: offset += buflen;
858: num_req++;
859: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 860: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 861: req->len, handle, handle_len);
862: }
1.1 djm 863:
864: buffer_clear(&msg);
1.23 djm 865: get_msg(conn->fd_in, &msg);
1.1 djm 866: type = buffer_get_char(&msg);
867: id = buffer_get_int(&msg);
1.33 deraadt 868: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 869:
870: /* Find the request in our queue */
1.53 deraadt 871: for (req = TAILQ_FIRST(&requests);
1.21 djm 872: req != NULL && req->id != id;
873: req = TAILQ_NEXT(req, tq))
874: ;
875: if (req == NULL)
876: fatal("Unexpected reply %u", id);
877:
878: switch (type) {
879: case SSH2_FXP_STATUS:
1.5 djm 880: status = buffer_get_int(&msg);
1.21 djm 881: if (status != SSH2_FX_EOF)
882: read_error = 1;
883: max_req = 0;
884: TAILQ_REMOVE(&requests, req, tq);
885: xfree(req);
886: num_req--;
887: break;
888: case SSH2_FXP_DATA:
889: data = buffer_get_string(&msg, &len);
1.26 itojun 890: debug3("Received data %llu -> %llu",
1.28 markus 891: (unsigned long long)req->offset,
1.26 itojun 892: (unsigned long long)req->offset + len - 1);
1.21 djm 893: if (len > req->len)
894: fatal("Received more data than asked for "
1.37 deraadt 895: "%u > %u", len, req->len);
1.21 djm 896: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 897: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 898: !write_error) {
899: write_errno = errno;
900: write_error = 1;
901: max_req = 0;
902: }
1.39 fgsch 903: progress_counter += len;
1.21 djm 904: xfree(data);
1.1 djm 905:
1.21 djm 906: if (len == req->len) {
907: TAILQ_REMOVE(&requests, req, tq);
908: xfree(req);
909: num_req--;
910: } else {
911: /* Resend the request for the missing data */
912: debug3("Short data block, re-requesting "
1.26 itojun 913: "%llu -> %llu (%2d)",
1.28 markus 914: (unsigned long long)req->offset + len,
1.27 itojun 915: (unsigned long long)req->offset +
916: req->len - 1, num_req);
1.23 djm 917: req->id = conn->msg_id++;
1.21 djm 918: req->len -= len;
919: req->offset += len;
1.28 markus 920: send_read_request(conn->fd_out, req->id,
1.23 djm 921: req->offset, req->len, handle, handle_len);
1.21 djm 922: /* Reduce the request size */
923: if (len < buflen)
924: buflen = MAX(MIN_READ_SIZE, len);
925: }
926: if (max_req > 0) { /* max_req = 0 iff EOF received */
927: if (size > 0 && offset > size) {
928: /* Only one request at a time
929: * after the expected EOF */
930: debug3("Finish at %llu (%2d)",
1.26 itojun 931: (unsigned long long)offset,
932: num_req);
1.21 djm 933: max_req = 1;
1.49 djm 934: } else if (max_req <= conn->num_requests) {
1.21 djm 935: ++max_req;
936: }
1.1 djm 937: }
1.21 djm 938: break;
939: default:
1.33 deraadt 940: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 941: SSH2_FXP_DATA, type);
942: }
1.21 djm 943: }
1.1 djm 944:
1.39 fgsch 945: if (showprogress && size)
946: stop_progress_meter();
947:
1.21 djm 948: /* Sanity check */
949: if (TAILQ_FIRST(&requests) != NULL)
950: fatal("Transfer complete, but requests still in queue");
951:
952: if (read_error) {
1.28 markus 953: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 954: remote_path, fx2txt(status));
1.23 djm 955: do_close(conn, handle, handle_len);
1.21 djm 956: } else if (write_error) {
957: error("Couldn't write to \"%s\": %s", local_path,
958: strerror(write_errno));
959: status = -1;
1.23 djm 960: do_close(conn, handle, handle_len);
1.21 djm 961: } else {
1.23 djm 962: status = do_close(conn, handle, handle_len);
1.21 djm 963:
964: /* Override umask and utimes if asked */
965: if (pflag && fchmod(local_fd, mode) == -1)
966: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 967: strerror(errno));
1.21 djm 968: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
969: struct timeval tv[2];
970: tv[0].tv_sec = a->atime;
971: tv[1].tv_sec = a->mtime;
972: tv[0].tv_usec = tv[1].tv_usec = 0;
973: if (utimes(local_path, tv) == -1)
974: error("Can't set times on \"%s\": %s",
1.37 deraadt 975: local_path, strerror(errno));
1.1 djm 976: }
1.10 djm 977: }
1.5 djm 978: close(local_fd);
979: buffer_free(&msg);
1.1 djm 980: xfree(handle);
1.23 djm 981:
982: return(status);
1.1 djm 983: }
984:
985: int
1.23 djm 986: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
987: int pflag)
1.1 djm 988: {
1.20 djm 989: int local_fd, status;
1.22 djm 990: u_int handle_len, id, type;
1.77 djm 991: off_t offset;
1.20 djm 992: char *handle, *data;
1.1 djm 993: Buffer msg;
994: struct stat sb;
995: Attrib a;
1.21 djm 996: u_int32_t startid;
997: u_int32_t ackid;
1.22 djm 998: struct outstanding_ack {
999: u_int id;
1000: u_int len;
1.77 djm 1001: off_t offset;
1.28 markus 1002: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 1003: };
1004: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 1005: struct outstanding_ack *ack = NULL;
1.22 djm 1006:
1007: TAILQ_INIT(&acks);
1.1 djm 1008:
1009: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1010: error("Couldn't open local file \"%s\" for reading: %s",
1011: local_path, strerror(errno));
1012: return(-1);
1013: }
1014: if (fstat(local_fd, &sb) == -1) {
1015: error("Couldn't fstat local file \"%s\": %s",
1016: local_path, strerror(errno));
1.41 djm 1017: close(local_fd);
1018: return(-1);
1019: }
1020: if (!S_ISREG(sb.st_mode)) {
1021: error("%s is not a regular file", local_path);
1.1 djm 1022: close(local_fd);
1023: return(-1);
1024: }
1025: stat_to_attrib(&sb, &a);
1026:
1027: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1028: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1029: a.perm &= 0777;
1030: if (!pflag)
1031: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1032:
1033: buffer_init(&msg);
1034:
1035: /* Send open request */
1.23 djm 1036: id = conn->msg_id++;
1.1 djm 1037: buffer_put_char(&msg, SSH2_FXP_OPEN);
1038: buffer_put_int(&msg, id);
1039: buffer_put_cstring(&msg, remote_path);
1040: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1041: encode_attrib(&msg, &a);
1.23 djm 1042: send_msg(conn->fd_out, &msg);
1.33 deraadt 1043: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1044:
1045: buffer_clear(&msg);
1046:
1.23 djm 1047: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1048: if (handle == NULL) {
1049: close(local_fd);
1050: buffer_free(&msg);
1051: return(-1);
1052: }
1053:
1.21 djm 1054: startid = ackid = id + 1;
1.23 djm 1055: data = xmalloc(conn->transfer_buflen);
1.20 djm 1056:
1.1 djm 1057: /* Read from local and write to remote */
1058: offset = 0;
1.39 fgsch 1059: if (showprogress)
1060: start_progress_meter(local_path, sb.st_size, &offset);
1061:
1.19 deraadt 1062: for (;;) {
1.1 djm 1063: int len;
1064:
1065: /*
1.51 deraadt 1066: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1067: * thus losing the last block of the file.
1.51 deraadt 1068: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1069: * server to drain.
1.1 djm 1070: */
1.49 djm 1071: if (interrupted)
1072: len = 0;
1073: else do
1.23 djm 1074: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1075: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1076:
1077: if (len == -1)
1078: fatal("Couldn't read from \"%s\": %s", local_path,
1079: strerror(errno));
1.21 djm 1080:
1081: if (len != 0) {
1.22 djm 1082: ack = xmalloc(sizeof(*ack));
1083: ack->id = ++id;
1084: ack->offset = offset;
1085: ack->len = len;
1086: TAILQ_INSERT_TAIL(&acks, ack, tq);
1087:
1.21 djm 1088: buffer_clear(&msg);
1089: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1090: buffer_put_int(&msg, ack->id);
1.21 djm 1091: buffer_put_string(&msg, handle, handle_len);
1092: buffer_put_int64(&msg, offset);
1093: buffer_put_string(&msg, data, len);
1.23 djm 1094: send_msg(conn->fd_out, &msg);
1.33 deraadt 1095: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1096: id, (unsigned long long)offset, len);
1.22 djm 1097: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1098: break;
1099:
1.22 djm 1100: if (ack == NULL)
1101: fatal("Unexpected ACK %u", id);
1102:
1.28 markus 1103: if (id == startid || len == 0 ||
1.23 djm 1104: id - ackid >= conn->num_requests) {
1.32 markus 1105: u_int r_id;
1.31 djm 1106:
1.22 djm 1107: buffer_clear(&msg);
1.23 djm 1108: get_msg(conn->fd_in, &msg);
1.22 djm 1109: type = buffer_get_char(&msg);
1.31 djm 1110: r_id = buffer_get_int(&msg);
1.22 djm 1111:
1112: if (type != SSH2_FXP_STATUS)
1113: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1114: "got %d", SSH2_FXP_STATUS, type);
1115:
1116: status = buffer_get_int(&msg);
1117: debug3("SSH2_FXP_STATUS %d", status);
1118:
1119: /* Find the request in our queue */
1.53 deraadt 1120: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1121: ack != NULL && ack->id != r_id;
1.22 djm 1122: ack = TAILQ_NEXT(ack, tq))
1123: ;
1124: if (ack == NULL)
1.33 deraadt 1125: fatal("Can't find request for ID %u", r_id);
1.22 djm 1126: TAILQ_REMOVE(&acks, ack, tq);
1127:
1.21 djm 1128: if (status != SSH2_FX_OK) {
1129: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1130: remote_path, fx2txt(status));
1.75 djm 1131: if (showprogress)
1132: stop_progress_meter();
1.23 djm 1133: do_close(conn, handle, handle_len);
1.21 djm 1134: close(local_fd);
1.42 markus 1135: xfree(data);
1136: xfree(ack);
1.76 djm 1137: status = -1;
1.21 djm 1138: goto done;
1139: }
1.77 djm 1140: debug3("In write loop, ack for %u %u bytes at %lld",
1141: ack->id, ack->len, (long long)ack->offset);
1.21 djm 1142: ++ackid;
1.34 deraadt 1143: xfree(ack);
1.1 djm 1144: }
1145: offset += len;
1.77 djm 1146: if (offset < 0)
1147: fatal("%s: offset < 0", __func__);
1.1 djm 1148: }
1.39 fgsch 1149: if (showprogress)
1150: stop_progress_meter();
1.20 djm 1151: xfree(data);
1.1 djm 1152:
1153: if (close(local_fd) == -1) {
1154: error("Couldn't close local file \"%s\": %s", local_path,
1155: strerror(errno));
1.23 djm 1156: do_close(conn, handle, handle_len);
1.5 djm 1157: status = -1;
1158: goto done;
1.1 djm 1159: }
1160:
1.10 djm 1161: /* Override umask and utimes if asked */
1162: if (pflag)
1.23 djm 1163: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1164:
1.23 djm 1165: status = do_close(conn, handle, handle_len);
1.5 djm 1166:
1167: done:
1168: xfree(handle);
1169: buffer_free(&msg);
1.23 djm 1170: return(status);
1.1 djm 1171: }
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