Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.69
1.69 ! stevesk 1: /* $OpenBSD: sftp-client.c,v 1.68 2006/07/17 01:31:09 stevesk 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:
23: #include "includes.h"
1.21 djm 24:
25: #include <sys/queue.h>
1.60 stevesk 26: #include <sys/types.h>
27: #include <sys/stat.h>
1.66 stevesk 28:
1.67 stevesk 29: #include <errno.h>
1.66 stevesk 30: #include <fcntl.h>
1.69 ! stevesk 31: #include <string.h>
1.68 stevesk 32: #include <unistd.h>
1.1 djm 33:
34: #include "buffer.h"
35: #include "bufaux.h"
36: #include "xmalloc.h"
37: #include "log.h"
38: #include "atomicio.h"
1.39 fgsch 39: #include "progressmeter.h"
1.64 djm 40: #include "misc.h"
1.1 djm 41:
42: #include "sftp.h"
43: #include "sftp-common.h"
44: #include "sftp-client.h"
45:
1.49 djm 46: extern volatile sig_atomic_t interrupted;
1.39 fgsch 47: extern int showprogress;
48:
1.59 david 49: /* Minimum amount of data to read at a time */
1.21 djm 50: #define MIN_READ_SIZE 512
51:
1.23 djm 52: struct sftp_conn {
53: int fd_in;
54: int fd_out;
55: u_int transfer_buflen;
56: u_int num_requests;
57: u_int version;
58: u_int msg_id;
59: };
1.4 djm 60:
1.17 itojun 61: static void
1.1 djm 62: send_msg(int fd, Buffer *m)
63: {
1.40 djm 64: u_char mlen[4];
1.65 djm 65: struct iovec iov[2];
1.40 djm 66:
1.58 djm 67: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 68: fatal("Outbound message too long %u", buffer_len(m));
69:
70: /* Send length first */
1.64 djm 71: put_u32(mlen, buffer_len(m));
1.65 djm 72: iov[0].iov_base = mlen;
73: iov[0].iov_len = sizeof(mlen);
74: iov[1].iov_base = buffer_ptr(m);
75: iov[1].iov_len = buffer_len(m);
76:
77: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 78: fatal("Couldn't send packet: %s", strerror(errno));
79:
1.40 djm 80: buffer_clear(m);
1.1 djm 81: }
82:
1.17 itojun 83: static void
1.1 djm 84: get_msg(int fd, Buffer *m)
85: {
1.40 djm 86: u_int msg_len;
1.1 djm 87:
1.40 djm 88: buffer_append_space(m, 4);
1.54 avsm 89: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
90: if (errno == EPIPE)
91: fatal("Connection closed");
92: else
93: fatal("Couldn't read packet: %s", strerror(errno));
94: }
1.1 djm 95:
1.40 djm 96: msg_len = buffer_get_int(m);
1.58 djm 97: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 98: fatal("Received message too long %u", msg_len);
1.1 djm 99:
1.40 djm 100: buffer_append_space(m, msg_len);
1.54 avsm 101: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
102: if (errno == EPIPE)
103: fatal("Connection closed");
104: else
105: fatal("Read packet: %s", strerror(errno));
106: }
1.1 djm 107: }
108:
1.17 itojun 109: static void
1.1 djm 110: send_string_request(int fd, u_int id, u_int code, char *s,
111: u_int len)
112: {
113: Buffer msg;
114:
115: buffer_init(&msg);
116: buffer_put_char(&msg, code);
117: buffer_put_int(&msg, id);
118: buffer_put_string(&msg, s, len);
119: send_msg(fd, &msg);
1.33 deraadt 120: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 121: buffer_free(&msg);
122: }
123:
1.17 itojun 124: static void
1.1 djm 125: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
126: u_int len, Attrib *a)
127: {
128: Buffer msg;
129:
130: buffer_init(&msg);
131: buffer_put_char(&msg, code);
132: buffer_put_int(&msg, id);
133: buffer_put_string(&msg, s, len);
134: encode_attrib(&msg, a);
135: send_msg(fd, &msg);
1.33 deraadt 136: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 137: buffer_free(&msg);
138: }
139:
1.17 itojun 140: static u_int
1.33 deraadt 141: get_status(int fd, u_int expected_id)
1.1 djm 142: {
143: Buffer msg;
144: u_int type, id, status;
145:
146: buffer_init(&msg);
147: get_msg(fd, &msg);
148: type = buffer_get_char(&msg);
149: id = buffer_get_int(&msg);
150:
151: if (id != expected_id)
1.33 deraadt 152: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 153: if (type != SSH2_FXP_STATUS)
1.33 deraadt 154: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 155: SSH2_FXP_STATUS, type);
156:
157: status = buffer_get_int(&msg);
158: buffer_free(&msg);
159:
1.33 deraadt 160: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 161:
162: return(status);
163: }
164:
1.17 itojun 165: static char *
1.1 djm 166: get_handle(int fd, u_int expected_id, u_int *len)
167: {
168: Buffer msg;
169: u_int type, id;
170: char *handle;
171:
172: buffer_init(&msg);
173: get_msg(fd, &msg);
174: type = buffer_get_char(&msg);
175: id = buffer_get_int(&msg);
176:
177: if (id != expected_id)
1.33 deraadt 178: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 179: if (type == SSH2_FXP_STATUS) {
180: int status = buffer_get_int(&msg);
181:
182: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 183: buffer_free(&msg);
1.1 djm 184: return(NULL);
185: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 186: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 187: SSH2_FXP_HANDLE, type);
188:
189: handle = buffer_get_string(&msg, len);
190: buffer_free(&msg);
191:
192: return(handle);
193: }
194:
1.17 itojun 195: static Attrib *
1.14 djm 196: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 197: {
198: Buffer msg;
199: u_int type, id;
200: Attrib *a;
201:
202: buffer_init(&msg);
203: get_msg(fd, &msg);
204:
205: type = buffer_get_char(&msg);
206: id = buffer_get_int(&msg);
207:
1.33 deraadt 208: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 209: if (id != expected_id)
1.33 deraadt 210: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 211: if (type == SSH2_FXP_STATUS) {
212: int status = buffer_get_int(&msg);
213:
1.14 djm 214: if (quiet)
215: debug("Couldn't stat remote file: %s", fx2txt(status));
216: else
217: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 218: buffer_free(&msg);
1.1 djm 219: return(NULL);
220: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 221: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 222: SSH2_FXP_ATTRS, type);
223: }
224: a = decode_attrib(&msg);
225: buffer_free(&msg);
226:
227: return(a);
228: }
229:
1.23 djm 230: struct sftp_conn *
231: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 232: {
1.33 deraadt 233: u_int type;
234: int version;
1.1 djm 235: Buffer msg;
1.23 djm 236: struct sftp_conn *ret;
1.1 djm 237:
238: buffer_init(&msg);
239: buffer_put_char(&msg, SSH2_FXP_INIT);
240: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
241: send_msg(fd_out, &msg);
242:
243: buffer_clear(&msg);
244:
245: get_msg(fd_in, &msg);
246:
1.3 stevesk 247: /* Expecting a VERSION reply */
1.1 djm 248: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 249: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 250: type);
251: buffer_free(&msg);
1.23 djm 252: return(NULL);
1.1 djm 253: }
254: version = buffer_get_int(&msg);
255:
256: debug2("Remote version: %d", version);
257:
258: /* Check for extensions */
259: while (buffer_len(&msg) > 0) {
260: char *name = buffer_get_string(&msg, NULL);
261: char *value = buffer_get_string(&msg, NULL);
262:
263: debug2("Init extension: \"%s\"", name);
264: xfree(name);
265: xfree(value);
266: }
267:
268: buffer_free(&msg);
1.11 djm 269:
1.23 djm 270: ret = xmalloc(sizeof(*ret));
271: ret->fd_in = fd_in;
272: ret->fd_out = fd_out;
273: ret->transfer_buflen = transfer_buflen;
274: ret->num_requests = num_requests;
275: ret->version = version;
276: ret->msg_id = 1;
277:
278: /* Some filexfer v.0 servers don't support large packets */
279: if (version == 0)
1.29 markus 280: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 281:
282: return(ret);
283: }
284:
285: u_int
286: sftp_proto_version(struct sftp_conn *conn)
287: {
288: return(conn->version);
1.1 djm 289: }
290:
291: int
1.23 djm 292: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 293: {
294: u_int id, status;
295: Buffer msg;
296:
297: buffer_init(&msg);
298:
1.23 djm 299: id = conn->msg_id++;
1.1 djm 300: buffer_put_char(&msg, SSH2_FXP_CLOSE);
301: buffer_put_int(&msg, id);
302: buffer_put_string(&msg, handle, handle_len);
1.23 djm 303: send_msg(conn->fd_out, &msg);
1.33 deraadt 304: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 305:
1.23 djm 306: status = get_status(conn->fd_in, id);
1.1 djm 307: if (status != SSH2_FX_OK)
308: error("Couldn't close file: %s", fx2txt(status));
309:
310: buffer_free(&msg);
311:
312: return(status);
313: }
314:
1.12 djm 315:
1.17 itojun 316: static int
1.23 djm 317: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 318: SFTP_DIRENT ***dir)
1.1 djm 319: {
320: Buffer msg;
1.55 djm 321: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 322: char *handle;
323:
1.23 djm 324: id = conn->msg_id++;
1.1 djm 325:
326: buffer_init(&msg);
327: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
328: buffer_put_int(&msg, id);
329: buffer_put_cstring(&msg, path);
1.23 djm 330: send_msg(conn->fd_out, &msg);
1.1 djm 331:
332: buffer_clear(&msg);
333:
1.23 djm 334: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 335: if (handle == NULL)
336: return(-1);
337:
1.12 djm 338: if (dir) {
339: ents = 0;
340: *dir = xmalloc(sizeof(**dir));
341: (*dir)[0] = NULL;
342: }
343:
1.49 djm 344: for (; !interrupted;) {
1.23 djm 345: id = expected_id = conn->msg_id++;
1.1 djm 346:
1.33 deraadt 347: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 348:
349: buffer_clear(&msg);
350: buffer_put_char(&msg, SSH2_FXP_READDIR);
351: buffer_put_int(&msg, id);
352: buffer_put_string(&msg, handle, handle_len);
1.23 djm 353: send_msg(conn->fd_out, &msg);
1.1 djm 354:
355: buffer_clear(&msg);
356:
1.23 djm 357: get_msg(conn->fd_in, &msg);
1.1 djm 358:
359: type = buffer_get_char(&msg);
360: id = buffer_get_int(&msg);
361:
1.33 deraadt 362: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 363:
364: if (id != expected_id)
1.33 deraadt 365: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 366:
367: if (type == SSH2_FXP_STATUS) {
368: int status = buffer_get_int(&msg);
369:
370: debug3("Received SSH2_FXP_STATUS %d", status);
371:
372: if (status == SSH2_FX_EOF) {
373: break;
374: } else {
375: error("Couldn't read directory: %s",
376: fx2txt(status));
1.23 djm 377: do_close(conn, handle, handle_len);
1.42 markus 378: xfree(handle);
1.9 djm 379: return(status);
1.1 djm 380: }
381: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 382: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 383: SSH2_FXP_NAME, type);
384:
385: count = buffer_get_int(&msg);
1.7 markus 386: if (count == 0)
387: break;
1.8 stevesk 388: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 389: for (i = 0; i < count; i++) {
1.1 djm 390: char *filename, *longname;
391: Attrib *a;
392:
393: filename = buffer_get_string(&msg, NULL);
394: longname = buffer_get_string(&msg, NULL);
395: a = decode_attrib(&msg);
396:
1.12 djm 397: if (printflag)
398: printf("%s\n", longname);
399:
400: if (dir) {
1.62 djm 401: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 402: (*dir)[ents] = xmalloc(sizeof(***dir));
403: (*dir)[ents]->filename = xstrdup(filename);
404: (*dir)[ents]->longname = xstrdup(longname);
405: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
406: (*dir)[++ents] = NULL;
407: }
1.1 djm 408:
409: xfree(filename);
410: xfree(longname);
411: }
412: }
413:
414: buffer_free(&msg);
1.23 djm 415: do_close(conn, handle, handle_len);
1.1 djm 416: xfree(handle);
417:
1.49 djm 418: /* Don't return partial matches on interrupt */
419: if (interrupted && dir != NULL && *dir != NULL) {
420: free_sftp_dirents(*dir);
421: *dir = xmalloc(sizeof(**dir));
422: **dir = NULL;
423: }
424:
1.1 djm 425: return(0);
1.12 djm 426: }
427:
428: int
1.23 djm 429: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 430: {
1.23 djm 431: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 432: }
433:
434: void free_sftp_dirents(SFTP_DIRENT **s)
435: {
436: int i;
1.19 deraadt 437:
438: for (i = 0; s[i]; i++) {
1.12 djm 439: xfree(s[i]->filename);
440: xfree(s[i]->longname);
441: xfree(s[i]);
442: }
443: xfree(s);
444: }
445:
446: int
1.23 djm 447: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 448: {
449: u_int status, id;
450:
451: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
452:
1.23 djm 453: id = conn->msg_id++;
1.28 markus 454: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 455: strlen(path));
456: status = get_status(conn->fd_in, id);
1.1 djm 457: if (status != SSH2_FX_OK)
458: error("Couldn't delete file: %s", fx2txt(status));
459: return(status);
460: }
461:
462: int
1.23 djm 463: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 464: {
465: u_int status, id;
466:
1.23 djm 467: id = conn->msg_id++;
468: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 469: strlen(path), a);
470:
1.23 djm 471: status = get_status(conn->fd_in, id);
1.1 djm 472: if (status != SSH2_FX_OK)
473: error("Couldn't create directory: %s", fx2txt(status));
474:
475: return(status);
476: }
477:
478: int
1.23 djm 479: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 480: {
481: u_int status, id;
482:
1.23 djm 483: id = conn->msg_id++;
484: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
485: strlen(path));
1.1 djm 486:
1.23 djm 487: status = get_status(conn->fd_in, id);
1.1 djm 488: if (status != SSH2_FX_OK)
489: error("Couldn't remove directory: %s", fx2txt(status));
490:
491: return(status);
492: }
493:
494: Attrib *
1.23 djm 495: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 496: {
497: u_int id;
498:
1.23 djm 499: id = conn->msg_id++;
500:
1.28 markus 501: send_string_request(conn->fd_out, id,
502: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 503: path, strlen(path));
504:
505: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 506: }
507:
508: Attrib *
1.23 djm 509: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 510: {
511: u_int id;
512:
1.23 djm 513: if (conn->version == 0) {
514: if (quiet)
515: debug("Server version does not support lstat operation");
516: else
1.43 itojun 517: logit("Server version does not support lstat operation");
1.30 markus 518: return(do_stat(conn, path, quiet));
1.23 djm 519: }
520:
521: id = conn->msg_id++;
522: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
523: strlen(path));
524:
525: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 526: }
527:
528: Attrib *
1.23 djm 529: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 530: {
531: u_int id;
532:
1.23 djm 533: id = conn->msg_id++;
534: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
535: handle_len);
536:
537: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 538: }
539:
540: int
1.23 djm 541: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 542: {
543: u_int status, id;
544:
1.23 djm 545: id = conn->msg_id++;
546: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 547: strlen(path), a);
548:
1.23 djm 549: status = get_status(conn->fd_in, id);
1.1 djm 550: if (status != SSH2_FX_OK)
551: error("Couldn't setstat on \"%s\": %s", path,
552: fx2txt(status));
553:
554: return(status);
555: }
556:
557: int
1.23 djm 558: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 559: Attrib *a)
560: {
561: u_int status, id;
562:
1.23 djm 563: id = conn->msg_id++;
564: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 565: handle_len, a);
566:
1.23 djm 567: status = get_status(conn->fd_in, id);
1.1 djm 568: if (status != SSH2_FX_OK)
569: error("Couldn't fsetstat: %s", fx2txt(status));
570:
571: return(status);
572: }
573:
574: char *
1.23 djm 575: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 576: {
577: Buffer msg;
578: u_int type, expected_id, count, id;
579: char *filename, *longname;
580: Attrib *a;
581:
1.23 djm 582: expected_id = id = conn->msg_id++;
583: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
584: strlen(path));
1.1 djm 585:
586: buffer_init(&msg);
587:
1.23 djm 588: get_msg(conn->fd_in, &msg);
1.1 djm 589: type = buffer_get_char(&msg);
590: id = buffer_get_int(&msg);
591:
592: if (id != expected_id)
1.33 deraadt 593: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 594:
595: if (type == SSH2_FXP_STATUS) {
596: u_int status = buffer_get_int(&msg);
597:
598: error("Couldn't canonicalise: %s", fx2txt(status));
599: return(NULL);
600: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 601: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 602: SSH2_FXP_NAME, type);
603:
604: count = buffer_get_int(&msg);
605: if (count != 1)
606: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
607:
608: filename = buffer_get_string(&msg, NULL);
609: longname = buffer_get_string(&msg, NULL);
610: a = decode_attrib(&msg);
611:
612: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
613:
614: xfree(longname);
615:
616: buffer_free(&msg);
617:
618: return(filename);
619: }
620:
621: int
1.23 djm 622: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 623: {
624: Buffer msg;
625: u_int status, id;
626:
627: buffer_init(&msg);
628:
629: /* Send rename request */
1.23 djm 630: id = conn->msg_id++;
1.1 djm 631: buffer_put_char(&msg, SSH2_FXP_RENAME);
632: buffer_put_int(&msg, id);
633: buffer_put_cstring(&msg, oldpath);
634: buffer_put_cstring(&msg, newpath);
1.23 djm 635: send_msg(conn->fd_out, &msg);
1.1 djm 636: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
637: newpath);
638: buffer_free(&msg);
639:
1.23 djm 640: status = get_status(conn->fd_in, id);
1.1 djm 641: if (status != SSH2_FX_OK)
1.23 djm 642: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
643: newpath, fx2txt(status));
1.1 djm 644:
645: return(status);
1.11 djm 646: }
647:
648: int
1.23 djm 649: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 650: {
651: Buffer msg;
652: u_int status, id;
653:
1.23 djm 654: if (conn->version < 3) {
655: error("This server does not support the symlink operation");
656: return(SSH2_FX_OP_UNSUPPORTED);
657: }
658:
1.11 djm 659: buffer_init(&msg);
660:
1.48 djm 661: /* Send symlink request */
1.23 djm 662: id = conn->msg_id++;
1.11 djm 663: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
664: buffer_put_int(&msg, id);
665: buffer_put_cstring(&msg, oldpath);
666: buffer_put_cstring(&msg, newpath);
1.23 djm 667: send_msg(conn->fd_out, &msg);
1.11 djm 668: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
669: newpath);
670: buffer_free(&msg);
671:
1.23 djm 672: status = get_status(conn->fd_in, id);
1.11 djm 673: if (status != SSH2_FX_OK)
1.36 markus 674: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 675: newpath, fx2txt(status));
1.11 djm 676:
677: return(status);
678: }
679:
680: char *
1.23 djm 681: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 682: {
683: Buffer msg;
684: u_int type, expected_id, count, id;
685: char *filename, *longname;
686: Attrib *a;
687:
1.23 djm 688: expected_id = id = conn->msg_id++;
689: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
690: strlen(path));
1.11 djm 691:
692: buffer_init(&msg);
693:
1.23 djm 694: get_msg(conn->fd_in, &msg);
1.11 djm 695: type = buffer_get_char(&msg);
696: id = buffer_get_int(&msg);
697:
698: if (id != expected_id)
1.33 deraadt 699: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 700:
701: if (type == SSH2_FXP_STATUS) {
702: u_int status = buffer_get_int(&msg);
703:
704: error("Couldn't readlink: %s", fx2txt(status));
705: return(NULL);
706: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 707: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 708: SSH2_FXP_NAME, type);
709:
710: count = buffer_get_int(&msg);
711: if (count != 1)
712: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
713:
714: filename = buffer_get_string(&msg, NULL);
715: longname = buffer_get_string(&msg, NULL);
716: a = decode_attrib(&msg);
717:
718: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
719:
720: xfree(longname);
721:
722: buffer_free(&msg);
723:
724: return(filename);
1.1 djm 725: }
726:
1.21 djm 727: static void
728: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
729: char *handle, u_int handle_len)
730: {
731: Buffer msg;
1.28 markus 732:
1.21 djm 733: buffer_init(&msg);
734: buffer_clear(&msg);
735: buffer_put_char(&msg, SSH2_FXP_READ);
736: buffer_put_int(&msg, id);
737: buffer_put_string(&msg, handle, handle_len);
738: buffer_put_int64(&msg, offset);
739: buffer_put_int(&msg, len);
740: send_msg(fd_out, &msg);
741: buffer_free(&msg);
1.28 markus 742: }
1.21 djm 743:
1.1 djm 744: int
1.23 djm 745: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
746: int pflag)
1.1 djm 747: {
1.21 djm 748: Attrib junk, *a;
749: Buffer msg;
1.1 djm 750: char *handle;
1.57 dtucker 751: int local_fd, status = 0, write_error;
1.21 djm 752: int read_error, write_errno;
753: u_int64_t offset, size;
1.55 djm 754: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 755: off_t progress_counter;
1.21 djm 756: struct request {
757: u_int id;
758: u_int len;
759: u_int64_t offset;
1.28 markus 760: TAILQ_ENTRY(request) tq;
1.21 djm 761: };
762: TAILQ_HEAD(reqhead, request) requests;
763: struct request *req;
764:
765: TAILQ_INIT(&requests);
1.1 djm 766:
1.23 djm 767: a = do_stat(conn, remote_path, 0);
1.1 djm 768: if (a == NULL)
769: return(-1);
770:
771: /* XXX: should we preserve set[ug]id? */
772: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 773: mode = a->perm & 0777;
1.1 djm 774: else
775: mode = 0666;
776:
1.14 djm 777: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 778: (!S_ISREG(a->perm))) {
779: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 780: return(-1);
781: }
782:
1.21 djm 783: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
784: size = a->size;
785: else
786: size = 0;
787:
1.23 djm 788: buflen = conn->transfer_buflen;
1.1 djm 789: buffer_init(&msg);
790:
791: /* Send open request */
1.23 djm 792: id = conn->msg_id++;
1.1 djm 793: buffer_put_char(&msg, SSH2_FXP_OPEN);
794: buffer_put_int(&msg, id);
795: buffer_put_cstring(&msg, remote_path);
796: buffer_put_int(&msg, SSH2_FXF_READ);
797: attrib_clear(&junk); /* Send empty attributes */
798: encode_attrib(&msg, &junk);
1.23 djm 799: send_msg(conn->fd_out, &msg);
1.33 deraadt 800: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 801:
1.23 djm 802: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 803: if (handle == NULL) {
804: buffer_free(&msg);
805: return(-1);
806: }
807:
1.45 djm 808: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 809: mode | S_IWRITE);
1.23 djm 810: if (local_fd == -1) {
811: error("Couldn't open local file \"%s\" for writing: %s",
812: local_path, strerror(errno));
1.24 markus 813: buffer_free(&msg);
814: xfree(handle);
1.23 djm 815: return(-1);
816: }
817:
1.1 djm 818: /* Read from remote and write to local */
1.21 djm 819: write_error = read_error = write_errno = num_req = offset = 0;
820: max_req = 1;
1.39 fgsch 821: progress_counter = 0;
822:
1.47 djm 823: if (showprogress && size != 0)
824: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 825:
1.21 djm 826: while (num_req > 0 || max_req > 0) {
827: char *data;
1.1 djm 828: u_int len;
829:
1.49 djm 830: /*
1.51 deraadt 831: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 832: * allow outstanding requests to drain gracefully
833: */
834: if (interrupted) {
835: if (num_req == 0) /* If we haven't started yet... */
836: break;
837: max_req = 0;
838: }
839:
1.21 djm 840: /* Send some more requests */
841: while (num_req < max_req) {
1.28 markus 842: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 843: (unsigned long long)offset,
844: (unsigned long long)offset + buflen - 1,
845: num_req, max_req);
1.21 djm 846: req = xmalloc(sizeof(*req));
1.23 djm 847: req->id = conn->msg_id++;
1.21 djm 848: req->len = buflen;
849: req->offset = offset;
850: offset += buflen;
851: num_req++;
852: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 853: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 854: req->len, handle, handle_len);
855: }
1.1 djm 856:
857: buffer_clear(&msg);
1.23 djm 858: get_msg(conn->fd_in, &msg);
1.1 djm 859: type = buffer_get_char(&msg);
860: id = buffer_get_int(&msg);
1.33 deraadt 861: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 862:
863: /* Find the request in our queue */
1.53 deraadt 864: for (req = TAILQ_FIRST(&requests);
1.21 djm 865: req != NULL && req->id != id;
866: req = TAILQ_NEXT(req, tq))
867: ;
868: if (req == NULL)
869: fatal("Unexpected reply %u", id);
870:
871: switch (type) {
872: case SSH2_FXP_STATUS:
1.5 djm 873: status = buffer_get_int(&msg);
1.21 djm 874: if (status != SSH2_FX_EOF)
875: read_error = 1;
876: max_req = 0;
877: TAILQ_REMOVE(&requests, req, tq);
878: xfree(req);
879: num_req--;
880: break;
881: case SSH2_FXP_DATA:
882: data = buffer_get_string(&msg, &len);
1.26 itojun 883: debug3("Received data %llu -> %llu",
1.28 markus 884: (unsigned long long)req->offset,
1.26 itojun 885: (unsigned long long)req->offset + len - 1);
1.21 djm 886: if (len > req->len)
887: fatal("Received more data than asked for "
1.37 deraadt 888: "%u > %u", len, req->len);
1.21 djm 889: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 890: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 891: !write_error) {
892: write_errno = errno;
893: write_error = 1;
894: max_req = 0;
895: }
1.39 fgsch 896: progress_counter += len;
1.21 djm 897: xfree(data);
1.1 djm 898:
1.21 djm 899: if (len == req->len) {
900: TAILQ_REMOVE(&requests, req, tq);
901: xfree(req);
902: num_req--;
903: } else {
904: /* Resend the request for the missing data */
905: debug3("Short data block, re-requesting "
1.26 itojun 906: "%llu -> %llu (%2d)",
1.28 markus 907: (unsigned long long)req->offset + len,
1.27 itojun 908: (unsigned long long)req->offset +
909: req->len - 1, num_req);
1.23 djm 910: req->id = conn->msg_id++;
1.21 djm 911: req->len -= len;
912: req->offset += len;
1.28 markus 913: send_read_request(conn->fd_out, req->id,
1.23 djm 914: req->offset, req->len, handle, handle_len);
1.21 djm 915: /* Reduce the request size */
916: if (len < buflen)
917: buflen = MAX(MIN_READ_SIZE, len);
918: }
919: if (max_req > 0) { /* max_req = 0 iff EOF received */
920: if (size > 0 && offset > size) {
921: /* Only one request at a time
922: * after the expected EOF */
923: debug3("Finish at %llu (%2d)",
1.26 itojun 924: (unsigned long long)offset,
925: num_req);
1.21 djm 926: max_req = 1;
1.49 djm 927: } else if (max_req <= conn->num_requests) {
1.21 djm 928: ++max_req;
929: }
1.1 djm 930: }
1.21 djm 931: break;
932: default:
1.33 deraadt 933: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 934: SSH2_FXP_DATA, type);
935: }
1.21 djm 936: }
1.1 djm 937:
1.39 fgsch 938: if (showprogress && size)
939: stop_progress_meter();
940:
1.21 djm 941: /* Sanity check */
942: if (TAILQ_FIRST(&requests) != NULL)
943: fatal("Transfer complete, but requests still in queue");
944:
945: if (read_error) {
1.28 markus 946: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 947: remote_path, fx2txt(status));
1.23 djm 948: do_close(conn, handle, handle_len);
1.21 djm 949: } else if (write_error) {
950: error("Couldn't write to \"%s\": %s", local_path,
951: strerror(write_errno));
952: status = -1;
1.23 djm 953: do_close(conn, handle, handle_len);
1.21 djm 954: } else {
1.23 djm 955: status = do_close(conn, handle, handle_len);
1.21 djm 956:
957: /* Override umask and utimes if asked */
958: if (pflag && fchmod(local_fd, mode) == -1)
959: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 960: strerror(errno));
1.21 djm 961: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
962: struct timeval tv[2];
963: tv[0].tv_sec = a->atime;
964: tv[1].tv_sec = a->mtime;
965: tv[0].tv_usec = tv[1].tv_usec = 0;
966: if (utimes(local_path, tv) == -1)
967: error("Can't set times on \"%s\": %s",
1.37 deraadt 968: local_path, strerror(errno));
1.1 djm 969: }
1.10 djm 970: }
1.5 djm 971: close(local_fd);
972: buffer_free(&msg);
1.1 djm 973: xfree(handle);
1.23 djm 974:
975: return(status);
1.1 djm 976: }
977:
978: int
1.23 djm 979: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
980: int pflag)
1.1 djm 981: {
1.20 djm 982: int local_fd, status;
1.22 djm 983: u_int handle_len, id, type;
1.1 djm 984: u_int64_t offset;
1.20 djm 985: char *handle, *data;
1.1 djm 986: Buffer msg;
987: struct stat sb;
988: Attrib a;
1.21 djm 989: u_int32_t startid;
990: u_int32_t ackid;
1.22 djm 991: struct outstanding_ack {
992: u_int id;
993: u_int len;
994: u_int64_t offset;
1.28 markus 995: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 996: };
997: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 998: struct outstanding_ack *ack = NULL;
1.22 djm 999:
1000: TAILQ_INIT(&acks);
1.1 djm 1001:
1002: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1003: error("Couldn't open local file \"%s\" for reading: %s",
1004: local_path, strerror(errno));
1005: return(-1);
1006: }
1007: if (fstat(local_fd, &sb) == -1) {
1008: error("Couldn't fstat local file \"%s\": %s",
1009: local_path, strerror(errno));
1.41 djm 1010: close(local_fd);
1011: return(-1);
1012: }
1013: if (!S_ISREG(sb.st_mode)) {
1014: error("%s is not a regular file", local_path);
1.1 djm 1015: close(local_fd);
1016: return(-1);
1017: }
1018: stat_to_attrib(&sb, &a);
1019:
1020: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1021: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1022: a.perm &= 0777;
1023: if (!pflag)
1024: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1025:
1026: buffer_init(&msg);
1027:
1028: /* Send open request */
1.23 djm 1029: id = conn->msg_id++;
1.1 djm 1030: buffer_put_char(&msg, SSH2_FXP_OPEN);
1031: buffer_put_int(&msg, id);
1032: buffer_put_cstring(&msg, remote_path);
1033: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1034: encode_attrib(&msg, &a);
1.23 djm 1035: send_msg(conn->fd_out, &msg);
1.33 deraadt 1036: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1037:
1038: buffer_clear(&msg);
1039:
1.23 djm 1040: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1041: if (handle == NULL) {
1042: close(local_fd);
1043: buffer_free(&msg);
1044: return(-1);
1045: }
1046:
1.21 djm 1047: startid = ackid = id + 1;
1.23 djm 1048: data = xmalloc(conn->transfer_buflen);
1.20 djm 1049:
1.1 djm 1050: /* Read from local and write to remote */
1051: offset = 0;
1.39 fgsch 1052: if (showprogress)
1053: start_progress_meter(local_path, sb.st_size, &offset);
1054:
1.19 deraadt 1055: for (;;) {
1.1 djm 1056: int len;
1057:
1058: /*
1.51 deraadt 1059: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1060: * thus losing the last block of the file.
1.51 deraadt 1061: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1062: * server to drain.
1.1 djm 1063: */
1.49 djm 1064: if (interrupted)
1065: len = 0;
1066: else do
1.23 djm 1067: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1068: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1069:
1070: if (len == -1)
1071: fatal("Couldn't read from \"%s\": %s", local_path,
1072: strerror(errno));
1.21 djm 1073:
1074: if (len != 0) {
1.22 djm 1075: ack = xmalloc(sizeof(*ack));
1076: ack->id = ++id;
1077: ack->offset = offset;
1078: ack->len = len;
1079: TAILQ_INSERT_TAIL(&acks, ack, tq);
1080:
1.21 djm 1081: buffer_clear(&msg);
1082: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1083: buffer_put_int(&msg, ack->id);
1.21 djm 1084: buffer_put_string(&msg, handle, handle_len);
1085: buffer_put_int64(&msg, offset);
1086: buffer_put_string(&msg, data, len);
1.23 djm 1087: send_msg(conn->fd_out, &msg);
1.33 deraadt 1088: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1089: id, (unsigned long long)offset, len);
1.22 djm 1090: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1091: break;
1092:
1.22 djm 1093: if (ack == NULL)
1094: fatal("Unexpected ACK %u", id);
1095:
1.28 markus 1096: if (id == startid || len == 0 ||
1.23 djm 1097: id - ackid >= conn->num_requests) {
1.32 markus 1098: u_int r_id;
1.31 djm 1099:
1.22 djm 1100: buffer_clear(&msg);
1.23 djm 1101: get_msg(conn->fd_in, &msg);
1.22 djm 1102: type = buffer_get_char(&msg);
1.31 djm 1103: r_id = buffer_get_int(&msg);
1.22 djm 1104:
1105: if (type != SSH2_FXP_STATUS)
1106: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1107: "got %d", SSH2_FXP_STATUS, type);
1108:
1109: status = buffer_get_int(&msg);
1110: debug3("SSH2_FXP_STATUS %d", status);
1111:
1112: /* Find the request in our queue */
1.53 deraadt 1113: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1114: ack != NULL && ack->id != r_id;
1.22 djm 1115: ack = TAILQ_NEXT(ack, tq))
1116: ;
1117: if (ack == NULL)
1.33 deraadt 1118: fatal("Can't find request for ID %u", r_id);
1.22 djm 1119: TAILQ_REMOVE(&acks, ack, tq);
1120:
1.21 djm 1121: if (status != SSH2_FX_OK) {
1122: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1123: remote_path, fx2txt(status));
1.23 djm 1124: do_close(conn, handle, handle_len);
1.21 djm 1125: close(local_fd);
1.42 markus 1126: xfree(data);
1127: xfree(ack);
1.21 djm 1128: goto done;
1129: }
1.33 deraadt 1130: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1131: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1132: ++ackid;
1.34 deraadt 1133: xfree(ack);
1.1 djm 1134: }
1135: offset += len;
1136: }
1.39 fgsch 1137: if (showprogress)
1138: stop_progress_meter();
1.20 djm 1139: xfree(data);
1.1 djm 1140:
1141: if (close(local_fd) == -1) {
1142: error("Couldn't close local file \"%s\": %s", local_path,
1143: strerror(errno));
1.23 djm 1144: do_close(conn, handle, handle_len);
1.5 djm 1145: status = -1;
1146: goto done;
1.1 djm 1147: }
1148:
1.10 djm 1149: /* Override umask and utimes if asked */
1150: if (pflag)
1.23 djm 1151: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1152:
1.23 djm 1153: status = do_close(conn, handle, handle_len);
1.5 djm 1154:
1155: done:
1156: xfree(handle);
1157: buffer_free(&msg);
1.23 djm 1158: return(status);
1.1 djm 1159: }
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