Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.70
1.70 ! stevesk 1: /* $OpenBSD: sftp-client.c,v 1.69 2006/07/22 20:48:23 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>
1.70 ! stevesk 31: #include <signal.h>
1.69 stevesk 32: #include <string.h>
1.68 stevesk 33: #include <unistd.h>
1.1 djm 34:
35: #include "buffer.h"
36: #include "bufaux.h"
37: #include "xmalloc.h"
38: #include "log.h"
39: #include "atomicio.h"
1.39 fgsch 40: #include "progressmeter.h"
1.64 djm 41: #include "misc.h"
1.1 djm 42:
43: #include "sftp.h"
44: #include "sftp-common.h"
45: #include "sftp-client.h"
46:
1.49 djm 47: extern volatile sig_atomic_t interrupted;
1.39 fgsch 48: extern int showprogress;
49:
1.59 david 50: /* Minimum amount of data to read at a time */
1.21 djm 51: #define MIN_READ_SIZE 512
52:
1.23 djm 53: struct sftp_conn {
54: int fd_in;
55: int fd_out;
56: u_int transfer_buflen;
57: u_int num_requests;
58: u_int version;
59: u_int msg_id;
60: };
1.4 djm 61:
1.17 itojun 62: static void
1.1 djm 63: send_msg(int fd, Buffer *m)
64: {
1.40 djm 65: u_char mlen[4];
1.65 djm 66: struct iovec iov[2];
1.40 djm 67:
1.58 djm 68: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 69: fatal("Outbound message too long %u", buffer_len(m));
70:
71: /* Send length first */
1.64 djm 72: put_u32(mlen, buffer_len(m));
1.65 djm 73: iov[0].iov_base = mlen;
74: iov[0].iov_len = sizeof(mlen);
75: iov[1].iov_base = buffer_ptr(m);
76: iov[1].iov_len = buffer_len(m);
77:
78: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 79: fatal("Couldn't send packet: %s", strerror(errno));
80:
1.40 djm 81: buffer_clear(m);
1.1 djm 82: }
83:
1.17 itojun 84: static void
1.1 djm 85: get_msg(int fd, Buffer *m)
86: {
1.40 djm 87: u_int msg_len;
1.1 djm 88:
1.40 djm 89: buffer_append_space(m, 4);
1.54 avsm 90: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
91: if (errno == EPIPE)
92: fatal("Connection closed");
93: else
94: fatal("Couldn't read packet: %s", strerror(errno));
95: }
1.1 djm 96:
1.40 djm 97: msg_len = buffer_get_int(m);
1.58 djm 98: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 99: fatal("Received message too long %u", msg_len);
1.1 djm 100:
1.40 djm 101: buffer_append_space(m, msg_len);
1.54 avsm 102: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
103: if (errno == EPIPE)
104: fatal("Connection closed");
105: else
106: fatal("Read packet: %s", strerror(errno));
107: }
1.1 djm 108: }
109:
1.17 itojun 110: static void
1.1 djm 111: send_string_request(int fd, u_int id, u_int code, char *s,
112: u_int len)
113: {
114: Buffer msg;
115:
116: buffer_init(&msg);
117: buffer_put_char(&msg, code);
118: buffer_put_int(&msg, id);
119: buffer_put_string(&msg, s, len);
120: send_msg(fd, &msg);
1.33 deraadt 121: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 122: buffer_free(&msg);
123: }
124:
1.17 itojun 125: static void
1.1 djm 126: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
127: u_int len, Attrib *a)
128: {
129: Buffer msg;
130:
131: buffer_init(&msg);
132: buffer_put_char(&msg, code);
133: buffer_put_int(&msg, id);
134: buffer_put_string(&msg, s, len);
135: encode_attrib(&msg, a);
136: send_msg(fd, &msg);
1.33 deraadt 137: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 138: buffer_free(&msg);
139: }
140:
1.17 itojun 141: static u_int
1.33 deraadt 142: get_status(int fd, u_int expected_id)
1.1 djm 143: {
144: Buffer msg;
145: u_int type, id, status;
146:
147: buffer_init(&msg);
148: get_msg(fd, &msg);
149: type = buffer_get_char(&msg);
150: id = buffer_get_int(&msg);
151:
152: if (id != expected_id)
1.33 deraadt 153: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 154: if (type != SSH2_FXP_STATUS)
1.33 deraadt 155: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 156: SSH2_FXP_STATUS, type);
157:
158: status = buffer_get_int(&msg);
159: buffer_free(&msg);
160:
1.33 deraadt 161: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 162:
163: return(status);
164: }
165:
1.17 itojun 166: static char *
1.1 djm 167: get_handle(int fd, u_int expected_id, u_int *len)
168: {
169: Buffer msg;
170: u_int type, id;
171: char *handle;
172:
173: buffer_init(&msg);
174: get_msg(fd, &msg);
175: type = buffer_get_char(&msg);
176: id = buffer_get_int(&msg);
177:
178: if (id != expected_id)
1.33 deraadt 179: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 180: if (type == SSH2_FXP_STATUS) {
181: int status = buffer_get_int(&msg);
182:
183: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 184: buffer_free(&msg);
1.1 djm 185: return(NULL);
186: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 187: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 188: SSH2_FXP_HANDLE, type);
189:
190: handle = buffer_get_string(&msg, len);
191: buffer_free(&msg);
192:
193: return(handle);
194: }
195:
1.17 itojun 196: static Attrib *
1.14 djm 197: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 198: {
199: Buffer msg;
200: u_int type, id;
201: Attrib *a;
202:
203: buffer_init(&msg);
204: get_msg(fd, &msg);
205:
206: type = buffer_get_char(&msg);
207: id = buffer_get_int(&msg);
208:
1.33 deraadt 209: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 210: if (id != expected_id)
1.33 deraadt 211: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 212: if (type == SSH2_FXP_STATUS) {
213: int status = buffer_get_int(&msg);
214:
1.14 djm 215: if (quiet)
216: debug("Couldn't stat remote file: %s", fx2txt(status));
217: else
218: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 219: buffer_free(&msg);
1.1 djm 220: return(NULL);
221: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 222: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 223: SSH2_FXP_ATTRS, type);
224: }
225: a = decode_attrib(&msg);
226: buffer_free(&msg);
227:
228: return(a);
229: }
230:
1.23 djm 231: struct sftp_conn *
232: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 233: {
1.33 deraadt 234: u_int type;
235: int version;
1.1 djm 236: Buffer msg;
1.23 djm 237: struct sftp_conn *ret;
1.1 djm 238:
239: buffer_init(&msg);
240: buffer_put_char(&msg, SSH2_FXP_INIT);
241: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
242: send_msg(fd_out, &msg);
243:
244: buffer_clear(&msg);
245:
246: get_msg(fd_in, &msg);
247:
1.3 stevesk 248: /* Expecting a VERSION reply */
1.1 djm 249: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 250: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 251: type);
252: buffer_free(&msg);
1.23 djm 253: return(NULL);
1.1 djm 254: }
255: version = buffer_get_int(&msg);
256:
257: debug2("Remote version: %d", version);
258:
259: /* Check for extensions */
260: while (buffer_len(&msg) > 0) {
261: char *name = buffer_get_string(&msg, NULL);
262: char *value = buffer_get_string(&msg, NULL);
263:
264: debug2("Init extension: \"%s\"", name);
265: xfree(name);
266: xfree(value);
267: }
268:
269: buffer_free(&msg);
1.11 djm 270:
1.23 djm 271: ret = xmalloc(sizeof(*ret));
272: ret->fd_in = fd_in;
273: ret->fd_out = fd_out;
274: ret->transfer_buflen = transfer_buflen;
275: ret->num_requests = num_requests;
276: ret->version = version;
277: ret->msg_id = 1;
278:
279: /* Some filexfer v.0 servers don't support large packets */
280: if (version == 0)
1.29 markus 281: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 282:
283: return(ret);
284: }
285:
286: u_int
287: sftp_proto_version(struct sftp_conn *conn)
288: {
289: return(conn->version);
1.1 djm 290: }
291:
292: int
1.23 djm 293: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 294: {
295: u_int id, status;
296: Buffer msg;
297:
298: buffer_init(&msg);
299:
1.23 djm 300: id = conn->msg_id++;
1.1 djm 301: buffer_put_char(&msg, SSH2_FXP_CLOSE);
302: buffer_put_int(&msg, id);
303: buffer_put_string(&msg, handle, handle_len);
1.23 djm 304: send_msg(conn->fd_out, &msg);
1.33 deraadt 305: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 306:
1.23 djm 307: status = get_status(conn->fd_in, id);
1.1 djm 308: if (status != SSH2_FX_OK)
309: error("Couldn't close file: %s", fx2txt(status));
310:
311: buffer_free(&msg);
312:
313: return(status);
314: }
315:
1.12 djm 316:
1.17 itojun 317: static int
1.23 djm 318: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 319: SFTP_DIRENT ***dir)
1.1 djm 320: {
321: Buffer msg;
1.55 djm 322: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 323: char *handle;
324:
1.23 djm 325: id = conn->msg_id++;
1.1 djm 326:
327: buffer_init(&msg);
328: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
329: buffer_put_int(&msg, id);
330: buffer_put_cstring(&msg, path);
1.23 djm 331: send_msg(conn->fd_out, &msg);
1.1 djm 332:
333: buffer_clear(&msg);
334:
1.23 djm 335: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 336: if (handle == NULL)
337: return(-1);
338:
1.12 djm 339: if (dir) {
340: ents = 0;
341: *dir = xmalloc(sizeof(**dir));
342: (*dir)[0] = NULL;
343: }
344:
1.49 djm 345: for (; !interrupted;) {
1.23 djm 346: id = expected_id = conn->msg_id++;
1.1 djm 347:
1.33 deraadt 348: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 349:
350: buffer_clear(&msg);
351: buffer_put_char(&msg, SSH2_FXP_READDIR);
352: buffer_put_int(&msg, id);
353: buffer_put_string(&msg, handle, handle_len);
1.23 djm 354: send_msg(conn->fd_out, &msg);
1.1 djm 355:
356: buffer_clear(&msg);
357:
1.23 djm 358: get_msg(conn->fd_in, &msg);
1.1 djm 359:
360: type = buffer_get_char(&msg);
361: id = buffer_get_int(&msg);
362:
1.33 deraadt 363: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 364:
365: if (id != expected_id)
1.33 deraadt 366: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 367:
368: if (type == SSH2_FXP_STATUS) {
369: int status = buffer_get_int(&msg);
370:
371: debug3("Received SSH2_FXP_STATUS %d", status);
372:
373: if (status == SSH2_FX_EOF) {
374: break;
375: } else {
376: error("Couldn't read directory: %s",
377: fx2txt(status));
1.23 djm 378: do_close(conn, handle, handle_len);
1.42 markus 379: xfree(handle);
1.9 djm 380: return(status);
1.1 djm 381: }
382: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 383: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 384: SSH2_FXP_NAME, type);
385:
386: count = buffer_get_int(&msg);
1.7 markus 387: if (count == 0)
388: break;
1.8 stevesk 389: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 390: for (i = 0; i < count; i++) {
1.1 djm 391: char *filename, *longname;
392: Attrib *a;
393:
394: filename = buffer_get_string(&msg, NULL);
395: longname = buffer_get_string(&msg, NULL);
396: a = decode_attrib(&msg);
397:
1.12 djm 398: if (printflag)
399: printf("%s\n", longname);
400:
401: if (dir) {
1.62 djm 402: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 403: (*dir)[ents] = xmalloc(sizeof(***dir));
404: (*dir)[ents]->filename = xstrdup(filename);
405: (*dir)[ents]->longname = xstrdup(longname);
406: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
407: (*dir)[++ents] = NULL;
408: }
1.1 djm 409:
410: xfree(filename);
411: xfree(longname);
412: }
413: }
414:
415: buffer_free(&msg);
1.23 djm 416: do_close(conn, handle, handle_len);
1.1 djm 417: xfree(handle);
418:
1.49 djm 419: /* Don't return partial matches on interrupt */
420: if (interrupted && dir != NULL && *dir != NULL) {
421: free_sftp_dirents(*dir);
422: *dir = xmalloc(sizeof(**dir));
423: **dir = NULL;
424: }
425:
1.1 djm 426: return(0);
1.12 djm 427: }
428:
429: int
1.23 djm 430: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 431: {
1.23 djm 432: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 433: }
434:
435: void free_sftp_dirents(SFTP_DIRENT **s)
436: {
437: int i;
1.19 deraadt 438:
439: for (i = 0; s[i]; i++) {
1.12 djm 440: xfree(s[i]->filename);
441: xfree(s[i]->longname);
442: xfree(s[i]);
443: }
444: xfree(s);
445: }
446:
447: int
1.23 djm 448: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 449: {
450: u_int status, id;
451:
452: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
453:
1.23 djm 454: id = conn->msg_id++;
1.28 markus 455: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 456: strlen(path));
457: status = get_status(conn->fd_in, id);
1.1 djm 458: if (status != SSH2_FX_OK)
459: error("Couldn't delete file: %s", fx2txt(status));
460: return(status);
461: }
462:
463: int
1.23 djm 464: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 465: {
466: u_int status, id;
467:
1.23 djm 468: id = conn->msg_id++;
469: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 470: strlen(path), a);
471:
1.23 djm 472: status = get_status(conn->fd_in, id);
1.1 djm 473: if (status != SSH2_FX_OK)
474: error("Couldn't create directory: %s", fx2txt(status));
475:
476: return(status);
477: }
478:
479: int
1.23 djm 480: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 481: {
482: u_int status, id;
483:
1.23 djm 484: id = conn->msg_id++;
485: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
486: strlen(path));
1.1 djm 487:
1.23 djm 488: status = get_status(conn->fd_in, id);
1.1 djm 489: if (status != SSH2_FX_OK)
490: error("Couldn't remove directory: %s", fx2txt(status));
491:
492: return(status);
493: }
494:
495: Attrib *
1.23 djm 496: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 497: {
498: u_int id;
499:
1.23 djm 500: id = conn->msg_id++;
501:
1.28 markus 502: send_string_request(conn->fd_out, id,
503: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 504: path, strlen(path));
505:
506: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 507: }
508:
509: Attrib *
1.23 djm 510: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 511: {
512: u_int id;
513:
1.23 djm 514: if (conn->version == 0) {
515: if (quiet)
516: debug("Server version does not support lstat operation");
517: else
1.43 itojun 518: logit("Server version does not support lstat operation");
1.30 markus 519: return(do_stat(conn, path, quiet));
1.23 djm 520: }
521:
522: id = conn->msg_id++;
523: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
524: strlen(path));
525:
526: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 527: }
528:
529: Attrib *
1.23 djm 530: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 531: {
532: u_int id;
533:
1.23 djm 534: id = conn->msg_id++;
535: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
536: handle_len);
537:
538: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 539: }
540:
541: int
1.23 djm 542: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 543: {
544: u_int status, id;
545:
1.23 djm 546: id = conn->msg_id++;
547: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 548: strlen(path), a);
549:
1.23 djm 550: status = get_status(conn->fd_in, id);
1.1 djm 551: if (status != SSH2_FX_OK)
552: error("Couldn't setstat on \"%s\": %s", path,
553: fx2txt(status));
554:
555: return(status);
556: }
557:
558: int
1.23 djm 559: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 560: Attrib *a)
561: {
562: u_int status, id;
563:
1.23 djm 564: id = conn->msg_id++;
565: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 566: handle_len, a);
567:
1.23 djm 568: status = get_status(conn->fd_in, id);
1.1 djm 569: if (status != SSH2_FX_OK)
570: error("Couldn't fsetstat: %s", fx2txt(status));
571:
572: return(status);
573: }
574:
575: char *
1.23 djm 576: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 577: {
578: Buffer msg;
579: u_int type, expected_id, count, id;
580: char *filename, *longname;
581: Attrib *a;
582:
1.23 djm 583: expected_id = id = conn->msg_id++;
584: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
585: strlen(path));
1.1 djm 586:
587: buffer_init(&msg);
588:
1.23 djm 589: get_msg(conn->fd_in, &msg);
1.1 djm 590: type = buffer_get_char(&msg);
591: id = buffer_get_int(&msg);
592:
593: if (id != expected_id)
1.33 deraadt 594: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 595:
596: if (type == SSH2_FXP_STATUS) {
597: u_int status = buffer_get_int(&msg);
598:
599: error("Couldn't canonicalise: %s", fx2txt(status));
600: return(NULL);
601: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 602: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 603: SSH2_FXP_NAME, type);
604:
605: count = buffer_get_int(&msg);
606: if (count != 1)
607: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
608:
609: filename = buffer_get_string(&msg, NULL);
610: longname = buffer_get_string(&msg, NULL);
611: a = decode_attrib(&msg);
612:
613: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
614:
615: xfree(longname);
616:
617: buffer_free(&msg);
618:
619: return(filename);
620: }
621:
622: int
1.23 djm 623: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 624: {
625: Buffer msg;
626: u_int status, id;
627:
628: buffer_init(&msg);
629:
630: /* Send rename request */
1.23 djm 631: id = conn->msg_id++;
1.1 djm 632: buffer_put_char(&msg, SSH2_FXP_RENAME);
633: buffer_put_int(&msg, id);
634: buffer_put_cstring(&msg, oldpath);
635: buffer_put_cstring(&msg, newpath);
1.23 djm 636: send_msg(conn->fd_out, &msg);
1.1 djm 637: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
638: newpath);
639: buffer_free(&msg);
640:
1.23 djm 641: status = get_status(conn->fd_in, id);
1.1 djm 642: if (status != SSH2_FX_OK)
1.23 djm 643: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
644: newpath, fx2txt(status));
1.1 djm 645:
646: return(status);
1.11 djm 647: }
648:
649: int
1.23 djm 650: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 651: {
652: Buffer msg;
653: u_int status, id;
654:
1.23 djm 655: if (conn->version < 3) {
656: error("This server does not support the symlink operation");
657: return(SSH2_FX_OP_UNSUPPORTED);
658: }
659:
1.11 djm 660: buffer_init(&msg);
661:
1.48 djm 662: /* Send symlink request */
1.23 djm 663: id = conn->msg_id++;
1.11 djm 664: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
665: buffer_put_int(&msg, id);
666: buffer_put_cstring(&msg, oldpath);
667: buffer_put_cstring(&msg, newpath);
1.23 djm 668: send_msg(conn->fd_out, &msg);
1.11 djm 669: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
670: newpath);
671: buffer_free(&msg);
672:
1.23 djm 673: status = get_status(conn->fd_in, id);
1.11 djm 674: if (status != SSH2_FX_OK)
1.36 markus 675: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 676: newpath, fx2txt(status));
1.11 djm 677:
678: return(status);
679: }
680:
681: char *
1.23 djm 682: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 683: {
684: Buffer msg;
685: u_int type, expected_id, count, id;
686: char *filename, *longname;
687: Attrib *a;
688:
1.23 djm 689: expected_id = id = conn->msg_id++;
690: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
691: strlen(path));
1.11 djm 692:
693: buffer_init(&msg);
694:
1.23 djm 695: get_msg(conn->fd_in, &msg);
1.11 djm 696: type = buffer_get_char(&msg);
697: id = buffer_get_int(&msg);
698:
699: if (id != expected_id)
1.33 deraadt 700: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 701:
702: if (type == SSH2_FXP_STATUS) {
703: u_int status = buffer_get_int(&msg);
704:
705: error("Couldn't readlink: %s", fx2txt(status));
706: return(NULL);
707: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 708: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 709: SSH2_FXP_NAME, type);
710:
711: count = buffer_get_int(&msg);
712: if (count != 1)
713: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
714:
715: filename = buffer_get_string(&msg, NULL);
716: longname = buffer_get_string(&msg, NULL);
717: a = decode_attrib(&msg);
718:
719: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
720:
721: xfree(longname);
722:
723: buffer_free(&msg);
724:
725: return(filename);
1.1 djm 726: }
727:
1.21 djm 728: static void
729: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
730: char *handle, u_int handle_len)
731: {
732: Buffer msg;
1.28 markus 733:
1.21 djm 734: buffer_init(&msg);
735: buffer_clear(&msg);
736: buffer_put_char(&msg, SSH2_FXP_READ);
737: buffer_put_int(&msg, id);
738: buffer_put_string(&msg, handle, handle_len);
739: buffer_put_int64(&msg, offset);
740: buffer_put_int(&msg, len);
741: send_msg(fd_out, &msg);
742: buffer_free(&msg);
1.28 markus 743: }
1.21 djm 744:
1.1 djm 745: int
1.23 djm 746: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
747: int pflag)
1.1 djm 748: {
1.21 djm 749: Attrib junk, *a;
750: Buffer msg;
1.1 djm 751: char *handle;
1.57 dtucker 752: int local_fd, status = 0, write_error;
1.21 djm 753: int read_error, write_errno;
754: u_int64_t offset, size;
1.55 djm 755: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 756: off_t progress_counter;
1.21 djm 757: struct request {
758: u_int id;
759: u_int len;
760: u_int64_t offset;
1.28 markus 761: TAILQ_ENTRY(request) tq;
1.21 djm 762: };
763: TAILQ_HEAD(reqhead, request) requests;
764: struct request *req;
765:
766: TAILQ_INIT(&requests);
1.1 djm 767:
1.23 djm 768: a = do_stat(conn, remote_path, 0);
1.1 djm 769: if (a == NULL)
770: return(-1);
771:
772: /* XXX: should we preserve set[ug]id? */
773: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 774: mode = a->perm & 0777;
1.1 djm 775: else
776: mode = 0666;
777:
1.14 djm 778: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 779: (!S_ISREG(a->perm))) {
780: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 781: return(-1);
782: }
783:
1.21 djm 784: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
785: size = a->size;
786: else
787: size = 0;
788:
1.23 djm 789: buflen = conn->transfer_buflen;
1.1 djm 790: buffer_init(&msg);
791:
792: /* Send open request */
1.23 djm 793: id = conn->msg_id++;
1.1 djm 794: buffer_put_char(&msg, SSH2_FXP_OPEN);
795: buffer_put_int(&msg, id);
796: buffer_put_cstring(&msg, remote_path);
797: buffer_put_int(&msg, SSH2_FXF_READ);
798: attrib_clear(&junk); /* Send empty attributes */
799: encode_attrib(&msg, &junk);
1.23 djm 800: send_msg(conn->fd_out, &msg);
1.33 deraadt 801: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 802:
1.23 djm 803: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 804: if (handle == NULL) {
805: buffer_free(&msg);
806: return(-1);
807: }
808:
1.45 djm 809: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 810: mode | S_IWRITE);
1.23 djm 811: if (local_fd == -1) {
812: error("Couldn't open local file \"%s\" for writing: %s",
813: local_path, strerror(errno));
1.24 markus 814: buffer_free(&msg);
815: xfree(handle);
1.23 djm 816: return(-1);
817: }
818:
1.1 djm 819: /* Read from remote and write to local */
1.21 djm 820: write_error = read_error = write_errno = num_req = offset = 0;
821: max_req = 1;
1.39 fgsch 822: progress_counter = 0;
823:
1.47 djm 824: if (showprogress && size != 0)
825: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 826:
1.21 djm 827: while (num_req > 0 || max_req > 0) {
828: char *data;
1.1 djm 829: u_int len;
830:
1.49 djm 831: /*
1.51 deraadt 832: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 833: * allow outstanding requests to drain gracefully
834: */
835: if (interrupted) {
836: if (num_req == 0) /* If we haven't started yet... */
837: break;
838: max_req = 0;
839: }
840:
1.21 djm 841: /* Send some more requests */
842: while (num_req < max_req) {
1.28 markus 843: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 844: (unsigned long long)offset,
845: (unsigned long long)offset + buflen - 1,
846: num_req, max_req);
1.21 djm 847: req = xmalloc(sizeof(*req));
1.23 djm 848: req->id = conn->msg_id++;
1.21 djm 849: req->len = buflen;
850: req->offset = offset;
851: offset += buflen;
852: num_req++;
853: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 854: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 855: req->len, handle, handle_len);
856: }
1.1 djm 857:
858: buffer_clear(&msg);
1.23 djm 859: get_msg(conn->fd_in, &msg);
1.1 djm 860: type = buffer_get_char(&msg);
861: id = buffer_get_int(&msg);
1.33 deraadt 862: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 863:
864: /* Find the request in our queue */
1.53 deraadt 865: for (req = TAILQ_FIRST(&requests);
1.21 djm 866: req != NULL && req->id != id;
867: req = TAILQ_NEXT(req, tq))
868: ;
869: if (req == NULL)
870: fatal("Unexpected reply %u", id);
871:
872: switch (type) {
873: case SSH2_FXP_STATUS:
1.5 djm 874: status = buffer_get_int(&msg);
1.21 djm 875: if (status != SSH2_FX_EOF)
876: read_error = 1;
877: max_req = 0;
878: TAILQ_REMOVE(&requests, req, tq);
879: xfree(req);
880: num_req--;
881: break;
882: case SSH2_FXP_DATA:
883: data = buffer_get_string(&msg, &len);
1.26 itojun 884: debug3("Received data %llu -> %llu",
1.28 markus 885: (unsigned long long)req->offset,
1.26 itojun 886: (unsigned long long)req->offset + len - 1);
1.21 djm 887: if (len > req->len)
888: fatal("Received more data than asked for "
1.37 deraadt 889: "%u > %u", len, req->len);
1.21 djm 890: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 891: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 892: !write_error) {
893: write_errno = errno;
894: write_error = 1;
895: max_req = 0;
896: }
1.39 fgsch 897: progress_counter += len;
1.21 djm 898: xfree(data);
1.1 djm 899:
1.21 djm 900: if (len == req->len) {
901: TAILQ_REMOVE(&requests, req, tq);
902: xfree(req);
903: num_req--;
904: } else {
905: /* Resend the request for the missing data */
906: debug3("Short data block, re-requesting "
1.26 itojun 907: "%llu -> %llu (%2d)",
1.28 markus 908: (unsigned long long)req->offset + len,
1.27 itojun 909: (unsigned long long)req->offset +
910: req->len - 1, num_req);
1.23 djm 911: req->id = conn->msg_id++;
1.21 djm 912: req->len -= len;
913: req->offset += len;
1.28 markus 914: send_read_request(conn->fd_out, req->id,
1.23 djm 915: req->offset, req->len, handle, handle_len);
1.21 djm 916: /* Reduce the request size */
917: if (len < buflen)
918: buflen = MAX(MIN_READ_SIZE, len);
919: }
920: if (max_req > 0) { /* max_req = 0 iff EOF received */
921: if (size > 0 && offset > size) {
922: /* Only one request at a time
923: * after the expected EOF */
924: debug3("Finish at %llu (%2d)",
1.26 itojun 925: (unsigned long long)offset,
926: num_req);
1.21 djm 927: max_req = 1;
1.49 djm 928: } else if (max_req <= conn->num_requests) {
1.21 djm 929: ++max_req;
930: }
1.1 djm 931: }
1.21 djm 932: break;
933: default:
1.33 deraadt 934: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 935: SSH2_FXP_DATA, type);
936: }
1.21 djm 937: }
1.1 djm 938:
1.39 fgsch 939: if (showprogress && size)
940: stop_progress_meter();
941:
1.21 djm 942: /* Sanity check */
943: if (TAILQ_FIRST(&requests) != NULL)
944: fatal("Transfer complete, but requests still in queue");
945:
946: if (read_error) {
1.28 markus 947: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 948: remote_path, fx2txt(status));
1.23 djm 949: do_close(conn, handle, handle_len);
1.21 djm 950: } else if (write_error) {
951: error("Couldn't write to \"%s\": %s", local_path,
952: strerror(write_errno));
953: status = -1;
1.23 djm 954: do_close(conn, handle, handle_len);
1.21 djm 955: } else {
1.23 djm 956: status = do_close(conn, handle, handle_len);
1.21 djm 957:
958: /* Override umask and utimes if asked */
959: if (pflag && fchmod(local_fd, mode) == -1)
960: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 961: strerror(errno));
1.21 djm 962: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
963: struct timeval tv[2];
964: tv[0].tv_sec = a->atime;
965: tv[1].tv_sec = a->mtime;
966: tv[0].tv_usec = tv[1].tv_usec = 0;
967: if (utimes(local_path, tv) == -1)
968: error("Can't set times on \"%s\": %s",
1.37 deraadt 969: local_path, strerror(errno));
1.1 djm 970: }
1.10 djm 971: }
1.5 djm 972: close(local_fd);
973: buffer_free(&msg);
1.1 djm 974: xfree(handle);
1.23 djm 975:
976: return(status);
1.1 djm 977: }
978:
979: int
1.23 djm 980: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
981: int pflag)
1.1 djm 982: {
1.20 djm 983: int local_fd, status;
1.22 djm 984: u_int handle_len, id, type;
1.1 djm 985: u_int64_t offset;
1.20 djm 986: char *handle, *data;
1.1 djm 987: Buffer msg;
988: struct stat sb;
989: Attrib a;
1.21 djm 990: u_int32_t startid;
991: u_int32_t ackid;
1.22 djm 992: struct outstanding_ack {
993: u_int id;
994: u_int len;
995: u_int64_t offset;
1.28 markus 996: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 997: };
998: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 999: struct outstanding_ack *ack = NULL;
1.22 djm 1000:
1001: TAILQ_INIT(&acks);
1.1 djm 1002:
1003: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1004: error("Couldn't open local file \"%s\" for reading: %s",
1005: local_path, strerror(errno));
1006: return(-1);
1007: }
1008: if (fstat(local_fd, &sb) == -1) {
1009: error("Couldn't fstat local file \"%s\": %s",
1010: local_path, strerror(errno));
1.41 djm 1011: close(local_fd);
1012: return(-1);
1013: }
1014: if (!S_ISREG(sb.st_mode)) {
1015: error("%s is not a regular file", local_path);
1.1 djm 1016: close(local_fd);
1017: return(-1);
1018: }
1019: stat_to_attrib(&sb, &a);
1020:
1021: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1022: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1023: a.perm &= 0777;
1024: if (!pflag)
1025: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1026:
1027: buffer_init(&msg);
1028:
1029: /* Send open request */
1.23 djm 1030: id = conn->msg_id++;
1.1 djm 1031: buffer_put_char(&msg, SSH2_FXP_OPEN);
1032: buffer_put_int(&msg, id);
1033: buffer_put_cstring(&msg, remote_path);
1034: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1035: encode_attrib(&msg, &a);
1.23 djm 1036: send_msg(conn->fd_out, &msg);
1.33 deraadt 1037: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1038:
1039: buffer_clear(&msg);
1040:
1.23 djm 1041: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1042: if (handle == NULL) {
1043: close(local_fd);
1044: buffer_free(&msg);
1045: return(-1);
1046: }
1047:
1.21 djm 1048: startid = ackid = id + 1;
1.23 djm 1049: data = xmalloc(conn->transfer_buflen);
1.20 djm 1050:
1.1 djm 1051: /* Read from local and write to remote */
1052: offset = 0;
1.39 fgsch 1053: if (showprogress)
1054: start_progress_meter(local_path, sb.st_size, &offset);
1055:
1.19 deraadt 1056: for (;;) {
1.1 djm 1057: int len;
1058:
1059: /*
1.51 deraadt 1060: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1061: * thus losing the last block of the file.
1.51 deraadt 1062: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1063: * server to drain.
1.1 djm 1064: */
1.49 djm 1065: if (interrupted)
1066: len = 0;
1067: else do
1.23 djm 1068: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1069: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1070:
1071: if (len == -1)
1072: fatal("Couldn't read from \"%s\": %s", local_path,
1073: strerror(errno));
1.21 djm 1074:
1075: if (len != 0) {
1.22 djm 1076: ack = xmalloc(sizeof(*ack));
1077: ack->id = ++id;
1078: ack->offset = offset;
1079: ack->len = len;
1080: TAILQ_INSERT_TAIL(&acks, ack, tq);
1081:
1.21 djm 1082: buffer_clear(&msg);
1083: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1084: buffer_put_int(&msg, ack->id);
1.21 djm 1085: buffer_put_string(&msg, handle, handle_len);
1086: buffer_put_int64(&msg, offset);
1087: buffer_put_string(&msg, data, len);
1.23 djm 1088: send_msg(conn->fd_out, &msg);
1.33 deraadt 1089: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1090: id, (unsigned long long)offset, len);
1.22 djm 1091: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1092: break;
1093:
1.22 djm 1094: if (ack == NULL)
1095: fatal("Unexpected ACK %u", id);
1096:
1.28 markus 1097: if (id == startid || len == 0 ||
1.23 djm 1098: id - ackid >= conn->num_requests) {
1.32 markus 1099: u_int r_id;
1.31 djm 1100:
1.22 djm 1101: buffer_clear(&msg);
1.23 djm 1102: get_msg(conn->fd_in, &msg);
1.22 djm 1103: type = buffer_get_char(&msg);
1.31 djm 1104: r_id = buffer_get_int(&msg);
1.22 djm 1105:
1106: if (type != SSH2_FXP_STATUS)
1107: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1108: "got %d", SSH2_FXP_STATUS, type);
1109:
1110: status = buffer_get_int(&msg);
1111: debug3("SSH2_FXP_STATUS %d", status);
1112:
1113: /* Find the request in our queue */
1.53 deraadt 1114: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1115: ack != NULL && ack->id != r_id;
1.22 djm 1116: ack = TAILQ_NEXT(ack, tq))
1117: ;
1118: if (ack == NULL)
1.33 deraadt 1119: fatal("Can't find request for ID %u", r_id);
1.22 djm 1120: TAILQ_REMOVE(&acks, ack, tq);
1121:
1.21 djm 1122: if (status != SSH2_FX_OK) {
1123: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1124: remote_path, fx2txt(status));
1.23 djm 1125: do_close(conn, handle, handle_len);
1.21 djm 1126: close(local_fd);
1.42 markus 1127: xfree(data);
1128: xfree(ack);
1.21 djm 1129: goto done;
1130: }
1.33 deraadt 1131: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1132: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1133: ++ackid;
1.34 deraadt 1134: xfree(ack);
1.1 djm 1135: }
1136: offset += len;
1137: }
1.39 fgsch 1138: if (showprogress)
1139: stop_progress_meter();
1.20 djm 1140: xfree(data);
1.1 djm 1141:
1142: if (close(local_fd) == -1) {
1143: error("Couldn't close local file \"%s\": %s", local_path,
1144: strerror(errno));
1.23 djm 1145: do_close(conn, handle, handle_len);
1.5 djm 1146: status = -1;
1147: goto done;
1.1 djm 1148: }
1149:
1.10 djm 1150: /* Override umask and utimes if asked */
1151: if (pflag)
1.23 djm 1152: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1153:
1.23 djm 1154: status = do_close(conn, handle, handle_len);
1.5 djm 1155:
1156: done:
1157: xfree(handle);
1158: buffer_free(&msg);
1.23 djm 1159: return(status);
1.1 djm 1160: }
![[BACK]](/icons/back.gif){kind=icon}
Return to sftp-client.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh