Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.33
1.1 djm 1: /*
1.23 djm 2: * Copyright (c) 2001,2002 Damien Miller. All rights reserved.
1.1 djm 3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24:
25: /* XXX: memleaks */
26: /* XXX: signed vs unsigned */
1.23 djm 27: /* XXX: remove all logging, only return status codes */
1.1 djm 28: /* XXX: copy between two remote sites */
29:
30: #include "includes.h"
1.33 ! deraadt 31: RCSID("$OpenBSD: sftp-client.c,v 1.32 2002/06/09 13:32:01 markus Exp $");
1.21 djm 32:
33: #include <sys/queue.h>
1.1 djm 34:
35: #include "buffer.h"
36: #include "bufaux.h"
37: #include "getput.h"
38: #include "xmalloc.h"
39: #include "log.h"
40: #include "atomicio.h"
41:
42: #include "sftp.h"
43: #include "sftp-common.h"
44: #include "sftp-client.h"
45:
1.21 djm 46: /* Minimum amount of data to read at at time */
47: #define MIN_READ_SIZE 512
48:
1.23 djm 49: struct sftp_conn {
50: int fd_in;
51: int fd_out;
52: u_int transfer_buflen;
53: u_int num_requests;
54: u_int version;
55: u_int msg_id;
56: };
1.4 djm 57:
1.17 itojun 58: static void
1.1 djm 59: send_msg(int fd, Buffer *m)
60: {
61: int mlen = buffer_len(m);
62: int len;
63: Buffer oqueue;
64:
65: buffer_init(&oqueue);
66: buffer_put_int(&oqueue, mlen);
67: buffer_append(&oqueue, buffer_ptr(m), mlen);
68: buffer_consume(m, mlen);
69:
70: len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue));
71: if (len <= 0)
72: fatal("Couldn't send packet: %s", strerror(errno));
73:
74: buffer_free(&oqueue);
75: }
76:
1.17 itojun 77: static void
1.1 djm 78: get_msg(int fd, Buffer *m)
79: {
80: u_int len, msg_len;
81: unsigned char buf[4096];
82:
83: len = atomicio(read, fd, buf, 4);
1.15 djm 84: if (len == 0)
85: fatal("Connection closed");
86: else if (len == -1)
1.1 djm 87: fatal("Couldn't read packet: %s", strerror(errno));
88:
89: msg_len = GET_32BIT(buf);
90: if (msg_len > 256 * 1024)
1.33 ! deraadt 91: fatal("Received message too long %u", msg_len);
1.1 djm 92:
93: while (msg_len) {
94: len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf)));
1.15 djm 95: if (len == 0)
96: fatal("Connection closed");
97: else if (len == -1)
1.1 djm 98: fatal("Couldn't read packet: %s", strerror(errno));
99:
100: msg_len -= len;
101: buffer_append(m, buf, len);
102: }
103: }
104:
1.17 itojun 105: static void
1.1 djm 106: send_string_request(int fd, u_int id, u_int code, char *s,
107: u_int len)
108: {
109: Buffer msg;
110:
111: buffer_init(&msg);
112: buffer_put_char(&msg, code);
113: buffer_put_int(&msg, id);
114: buffer_put_string(&msg, s, len);
115: send_msg(fd, &msg);
1.33 ! deraadt 116: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 117: buffer_free(&msg);
118: }
119:
1.17 itojun 120: static void
1.1 djm 121: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
122: u_int len, Attrib *a)
123: {
124: Buffer msg;
125:
126: buffer_init(&msg);
127: buffer_put_char(&msg, code);
128: buffer_put_int(&msg, id);
129: buffer_put_string(&msg, s, len);
130: encode_attrib(&msg, a);
131: send_msg(fd, &msg);
1.33 ! deraadt 132: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 133: buffer_free(&msg);
134: }
135:
1.17 itojun 136: static u_int
1.33 ! deraadt 137: get_status(int fd, u_int expected_id)
1.1 djm 138: {
139: Buffer msg;
140: u_int type, id, status;
141:
142: buffer_init(&msg);
143: get_msg(fd, &msg);
144: type = buffer_get_char(&msg);
145: id = buffer_get_int(&msg);
146:
147: if (id != expected_id)
1.33 ! deraadt 148: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 149: if (type != SSH2_FXP_STATUS)
1.33 ! deraadt 150: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 151: SSH2_FXP_STATUS, type);
152:
153: status = buffer_get_int(&msg);
154: buffer_free(&msg);
155:
1.33 ! deraadt 156: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 157:
158: return(status);
159: }
160:
1.17 itojun 161: static char *
1.1 djm 162: get_handle(int fd, u_int expected_id, u_int *len)
163: {
164: Buffer msg;
165: u_int type, id;
166: char *handle;
167:
168: buffer_init(&msg);
169: get_msg(fd, &msg);
170: type = buffer_get_char(&msg);
171: id = buffer_get_int(&msg);
172:
173: if (id != expected_id)
1.33 ! deraadt 174: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 175: if (type == SSH2_FXP_STATUS) {
176: int status = buffer_get_int(&msg);
177:
178: error("Couldn't get handle: %s", fx2txt(status));
179: return(NULL);
180: } else if (type != SSH2_FXP_HANDLE)
1.33 ! deraadt 181: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 182: SSH2_FXP_HANDLE, type);
183:
184: handle = buffer_get_string(&msg, len);
185: buffer_free(&msg);
186:
187: return(handle);
188: }
189:
1.17 itojun 190: static Attrib *
1.14 djm 191: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 192: {
193: Buffer msg;
194: u_int type, id;
195: Attrib *a;
196:
197: buffer_init(&msg);
198: get_msg(fd, &msg);
199:
200: type = buffer_get_char(&msg);
201: id = buffer_get_int(&msg);
202:
1.33 ! deraadt 203: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 204: if (id != expected_id)
1.33 ! deraadt 205: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 206: if (type == SSH2_FXP_STATUS) {
207: int status = buffer_get_int(&msg);
208:
1.14 djm 209: if (quiet)
210: debug("Couldn't stat remote file: %s", fx2txt(status));
211: else
212: error("Couldn't stat remote file: %s", fx2txt(status));
1.1 djm 213: return(NULL);
214: } else if (type != SSH2_FXP_ATTRS) {
1.33 ! deraadt 215: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 216: SSH2_FXP_ATTRS, type);
217: }
218: a = decode_attrib(&msg);
219: buffer_free(&msg);
220:
221: return(a);
222: }
223:
1.23 djm 224: struct sftp_conn *
225: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 226: {
1.33 ! deraadt 227: u_int type;
! 228: int version;
1.1 djm 229: Buffer msg;
1.23 djm 230: struct sftp_conn *ret;
1.1 djm 231:
232: buffer_init(&msg);
233: buffer_put_char(&msg, SSH2_FXP_INIT);
234: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
235: send_msg(fd_out, &msg);
236:
237: buffer_clear(&msg);
238:
239: get_msg(fd_in, &msg);
240:
1.3 stevesk 241: /* Expecting a VERSION reply */
1.1 djm 242: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 ! deraadt 243: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 244: type);
245: buffer_free(&msg);
1.23 djm 246: return(NULL);
1.1 djm 247: }
248: version = buffer_get_int(&msg);
249:
250: debug2("Remote version: %d", version);
251:
252: /* Check for extensions */
253: while (buffer_len(&msg) > 0) {
254: char *name = buffer_get_string(&msg, NULL);
255: char *value = buffer_get_string(&msg, NULL);
256:
257: debug2("Init extension: \"%s\"", name);
258: xfree(name);
259: xfree(value);
260: }
261:
262: buffer_free(&msg);
1.11 djm 263:
1.23 djm 264: ret = xmalloc(sizeof(*ret));
265: ret->fd_in = fd_in;
266: ret->fd_out = fd_out;
267: ret->transfer_buflen = transfer_buflen;
268: ret->num_requests = num_requests;
269: ret->version = version;
270: ret->msg_id = 1;
271:
272: /* Some filexfer v.0 servers don't support large packets */
273: if (version == 0)
1.29 markus 274: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 275:
276: return(ret);
277: }
278:
279: u_int
280: sftp_proto_version(struct sftp_conn *conn)
281: {
282: return(conn->version);
1.1 djm 283: }
284:
285: int
1.23 djm 286: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 287: {
288: u_int id, status;
289: Buffer msg;
290:
291: buffer_init(&msg);
292:
1.23 djm 293: id = conn->msg_id++;
1.1 djm 294: buffer_put_char(&msg, SSH2_FXP_CLOSE);
295: buffer_put_int(&msg, id);
296: buffer_put_string(&msg, handle, handle_len);
1.23 djm 297: send_msg(conn->fd_out, &msg);
1.33 ! deraadt 298: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 299:
1.23 djm 300: status = get_status(conn->fd_in, id);
1.1 djm 301: if (status != SSH2_FX_OK)
302: error("Couldn't close file: %s", fx2txt(status));
303:
304: buffer_free(&msg);
305:
306: return(status);
307: }
308:
1.12 djm 309:
1.17 itojun 310: static int
1.23 djm 311: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 312: SFTP_DIRENT ***dir)
1.1 djm 313: {
314: Buffer msg;
1.13 markus 315: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 316: char *handle;
317:
1.23 djm 318: id = conn->msg_id++;
1.1 djm 319:
320: buffer_init(&msg);
321: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
322: buffer_put_int(&msg, id);
323: buffer_put_cstring(&msg, path);
1.23 djm 324: send_msg(conn->fd_out, &msg);
1.1 djm 325:
326: buffer_clear(&msg);
327:
1.23 djm 328: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 329: if (handle == NULL)
330: return(-1);
331:
1.12 djm 332: if (dir) {
333: ents = 0;
334: *dir = xmalloc(sizeof(**dir));
335: (*dir)[0] = NULL;
336: }
337:
1.19 deraadt 338: for (;;) {
1.1 djm 339: int count;
340:
1.23 djm 341: id = expected_id = conn->msg_id++;
1.1 djm 342:
1.33 ! deraadt 343: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 344:
345: buffer_clear(&msg);
346: buffer_put_char(&msg, SSH2_FXP_READDIR);
347: buffer_put_int(&msg, id);
348: buffer_put_string(&msg, handle, handle_len);
1.23 djm 349: send_msg(conn->fd_out, &msg);
1.1 djm 350:
351: buffer_clear(&msg);
352:
1.23 djm 353: get_msg(conn->fd_in, &msg);
1.1 djm 354:
355: type = buffer_get_char(&msg);
356: id = buffer_get_int(&msg);
357:
1.33 ! deraadt 358: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 359:
360: if (id != expected_id)
1.33 ! deraadt 361: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 362:
363: if (type == SSH2_FXP_STATUS) {
364: int status = buffer_get_int(&msg);
365:
366: debug3("Received SSH2_FXP_STATUS %d", status);
367:
368: if (status == SSH2_FX_EOF) {
369: break;
370: } else {
371: error("Couldn't read directory: %s",
372: fx2txt(status));
1.23 djm 373: do_close(conn, handle, handle_len);
1.9 djm 374: return(status);
1.1 djm 375: }
376: } else if (type != SSH2_FXP_NAME)
1.33 ! deraadt 377: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 378: SSH2_FXP_NAME, type);
379:
380: count = buffer_get_int(&msg);
1.7 markus 381: if (count == 0)
382: break;
1.8 stevesk 383: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 384: for (i = 0; i < count; i++) {
1.1 djm 385: char *filename, *longname;
386: Attrib *a;
387:
388: filename = buffer_get_string(&msg, NULL);
389: longname = buffer_get_string(&msg, NULL);
390: a = decode_attrib(&msg);
391:
1.12 djm 392: if (printflag)
393: printf("%s\n", longname);
394:
395: if (dir) {
1.16 markus 396: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 397: (ents + 2));
398: (*dir)[ents] = xmalloc(sizeof(***dir));
399: (*dir)[ents]->filename = xstrdup(filename);
400: (*dir)[ents]->longname = xstrdup(longname);
401: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
402: (*dir)[++ents] = NULL;
403: }
1.1 djm 404:
405: xfree(filename);
406: xfree(longname);
407: }
408: }
409:
410: buffer_free(&msg);
1.23 djm 411: do_close(conn, handle, handle_len);
1.1 djm 412: xfree(handle);
413:
414: return(0);
415: }
416:
417: int
1.23 djm 418: do_ls(struct sftp_conn *conn, char *path)
1.12 djm 419: {
1.23 djm 420: return(do_lsreaddir(conn, path, 1, NULL));
1.12 djm 421: }
422:
423: int
1.23 djm 424: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 425: {
1.23 djm 426: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 427: }
428:
429: void free_sftp_dirents(SFTP_DIRENT **s)
430: {
431: int i;
1.19 deraadt 432:
433: for (i = 0; s[i]; i++) {
1.12 djm 434: xfree(s[i]->filename);
435: xfree(s[i]->longname);
436: xfree(s[i]);
437: }
438: xfree(s);
439: }
440:
441: int
1.23 djm 442: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 443: {
444: u_int status, id;
445:
446: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
447:
1.23 djm 448: id = conn->msg_id++;
1.28 markus 449: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 450: strlen(path));
451: status = get_status(conn->fd_in, id);
1.1 djm 452: if (status != SSH2_FX_OK)
453: error("Couldn't delete file: %s", fx2txt(status));
454: return(status);
455: }
456:
457: int
1.23 djm 458: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 459: {
460: u_int status, id;
461:
1.23 djm 462: id = conn->msg_id++;
463: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 464: strlen(path), a);
465:
1.23 djm 466: status = get_status(conn->fd_in, id);
1.1 djm 467: if (status != SSH2_FX_OK)
468: error("Couldn't create directory: %s", fx2txt(status));
469:
470: return(status);
471: }
472:
473: int
1.23 djm 474: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 475: {
476: u_int status, id;
477:
1.23 djm 478: id = conn->msg_id++;
479: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
480: strlen(path));
1.1 djm 481:
1.23 djm 482: status = get_status(conn->fd_in, id);
1.1 djm 483: if (status != SSH2_FX_OK)
484: error("Couldn't remove directory: %s", fx2txt(status));
485:
486: return(status);
487: }
488:
489: Attrib *
1.23 djm 490: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 491: {
492: u_int id;
493:
1.23 djm 494: id = conn->msg_id++;
495:
1.28 markus 496: send_string_request(conn->fd_out, id,
497: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 498: path, strlen(path));
499:
500: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 501: }
502:
503: Attrib *
1.23 djm 504: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 505: {
506: u_int id;
507:
1.23 djm 508: if (conn->version == 0) {
509: if (quiet)
510: debug("Server version does not support lstat operation");
511: else
1.30 markus 512: log("Server version does not support lstat operation");
513: return(do_stat(conn, path, quiet));
1.23 djm 514: }
515:
516: id = conn->msg_id++;
517: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
518: strlen(path));
519:
520: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 521: }
522:
523: Attrib *
1.23 djm 524: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 525: {
526: u_int id;
527:
1.23 djm 528: id = conn->msg_id++;
529: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
530: handle_len);
531:
532: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 533: }
534:
535: int
1.23 djm 536: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 537: {
538: u_int status, id;
539:
1.23 djm 540: id = conn->msg_id++;
541: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 542: strlen(path), a);
543:
1.23 djm 544: status = get_status(conn->fd_in, id);
1.1 djm 545: if (status != SSH2_FX_OK)
546: error("Couldn't setstat on \"%s\": %s", path,
547: fx2txt(status));
548:
549: return(status);
550: }
551:
552: int
1.23 djm 553: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 554: Attrib *a)
555: {
556: u_int status, id;
557:
1.23 djm 558: id = conn->msg_id++;
559: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 560: handle_len, a);
561:
1.23 djm 562: status = get_status(conn->fd_in, id);
1.1 djm 563: if (status != SSH2_FX_OK)
564: error("Couldn't fsetstat: %s", fx2txt(status));
565:
566: return(status);
567: }
568:
569: char *
1.23 djm 570: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 571: {
572: Buffer msg;
573: u_int type, expected_id, count, id;
574: char *filename, *longname;
575: Attrib *a;
576:
1.23 djm 577: expected_id = id = conn->msg_id++;
578: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
579: strlen(path));
1.1 djm 580:
581: buffer_init(&msg);
582:
1.23 djm 583: get_msg(conn->fd_in, &msg);
1.1 djm 584: type = buffer_get_char(&msg);
585: id = buffer_get_int(&msg);
586:
587: if (id != expected_id)
1.33 ! deraadt 588: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 589:
590: if (type == SSH2_FXP_STATUS) {
591: u_int status = buffer_get_int(&msg);
592:
593: error("Couldn't canonicalise: %s", fx2txt(status));
594: return(NULL);
595: } else if (type != SSH2_FXP_NAME)
1.33 ! deraadt 596: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 597: SSH2_FXP_NAME, type);
598:
599: count = buffer_get_int(&msg);
600: if (count != 1)
601: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
602:
603: filename = buffer_get_string(&msg, NULL);
604: longname = buffer_get_string(&msg, NULL);
605: a = decode_attrib(&msg);
606:
607: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
608:
609: xfree(longname);
610:
611: buffer_free(&msg);
612:
613: return(filename);
614: }
615:
616: int
1.23 djm 617: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 618: {
619: Buffer msg;
620: u_int status, id;
621:
622: buffer_init(&msg);
623:
624: /* Send rename request */
1.23 djm 625: id = conn->msg_id++;
1.1 djm 626: buffer_put_char(&msg, SSH2_FXP_RENAME);
627: buffer_put_int(&msg, id);
628: buffer_put_cstring(&msg, oldpath);
629: buffer_put_cstring(&msg, newpath);
1.23 djm 630: send_msg(conn->fd_out, &msg);
1.1 djm 631: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
632: newpath);
633: buffer_free(&msg);
634:
1.23 djm 635: status = get_status(conn->fd_in, id);
1.1 djm 636: if (status != SSH2_FX_OK)
1.23 djm 637: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
638: newpath, fx2txt(status));
1.1 djm 639:
640: return(status);
1.11 djm 641: }
642:
643: int
1.23 djm 644: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 645: {
646: Buffer msg;
647: u_int status, id;
648:
1.23 djm 649: if (conn->version < 3) {
650: error("This server does not support the symlink operation");
651: return(SSH2_FX_OP_UNSUPPORTED);
652: }
653:
1.11 djm 654: buffer_init(&msg);
655:
656: /* Send rename request */
1.23 djm 657: id = conn->msg_id++;
1.11 djm 658: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
659: buffer_put_int(&msg, id);
660: buffer_put_cstring(&msg, oldpath);
661: buffer_put_cstring(&msg, newpath);
1.23 djm 662: send_msg(conn->fd_out, &msg);
1.11 djm 663: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
664: newpath);
665: buffer_free(&msg);
666:
1.23 djm 667: status = get_status(conn->fd_in, id);
1.11 djm 668: if (status != SSH2_FX_OK)
1.23 djm 669: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
670: newpath, fx2txt(status));
1.11 djm 671:
672: return(status);
673: }
674:
675: char *
1.23 djm 676: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 677: {
678: Buffer msg;
679: u_int type, expected_id, count, id;
680: char *filename, *longname;
681: Attrib *a;
682:
1.23 djm 683: expected_id = id = conn->msg_id++;
684: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
685: strlen(path));
1.11 djm 686:
687: buffer_init(&msg);
688:
1.23 djm 689: get_msg(conn->fd_in, &msg);
1.11 djm 690: type = buffer_get_char(&msg);
691: id = buffer_get_int(&msg);
692:
693: if (id != expected_id)
1.33 ! deraadt 694: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 695:
696: if (type == SSH2_FXP_STATUS) {
697: u_int status = buffer_get_int(&msg);
698:
699: error("Couldn't readlink: %s", fx2txt(status));
700: return(NULL);
701: } else if (type != SSH2_FXP_NAME)
1.33 ! deraadt 702: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 703: SSH2_FXP_NAME, type);
704:
705: count = buffer_get_int(&msg);
706: if (count != 1)
707: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
708:
709: filename = buffer_get_string(&msg, NULL);
710: longname = buffer_get_string(&msg, NULL);
711: a = decode_attrib(&msg);
712:
713: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
714:
715: xfree(longname);
716:
717: buffer_free(&msg);
718:
719: return(filename);
1.1 djm 720: }
721:
1.21 djm 722: static void
723: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
724: char *handle, u_int handle_len)
725: {
726: Buffer msg;
1.28 markus 727:
1.21 djm 728: buffer_init(&msg);
729: buffer_clear(&msg);
730: buffer_put_char(&msg, SSH2_FXP_READ);
731: buffer_put_int(&msg, id);
732: buffer_put_string(&msg, handle, handle_len);
733: buffer_put_int64(&msg, offset);
734: buffer_put_int(&msg, len);
735: send_msg(fd_out, &msg);
736: buffer_free(&msg);
1.28 markus 737: }
1.21 djm 738:
1.1 djm 739: int
1.23 djm 740: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
741: int pflag)
1.1 djm 742: {
1.21 djm 743: Attrib junk, *a;
744: Buffer msg;
1.1 djm 745: char *handle;
1.21 djm 746: int local_fd, status, num_req, max_req, write_error;
747: int read_error, write_errno;
748: u_int64_t offset, size;
1.23 djm 749: u_int handle_len, mode, type, id, buflen;
1.21 djm 750: struct request {
751: u_int id;
752: u_int len;
753: u_int64_t offset;
1.28 markus 754: TAILQ_ENTRY(request) tq;
1.21 djm 755: };
756: TAILQ_HEAD(reqhead, request) requests;
757: struct request *req;
758:
759: TAILQ_INIT(&requests);
1.1 djm 760:
1.23 djm 761: a = do_stat(conn, remote_path, 0);
1.1 djm 762: if (a == NULL)
763: return(-1);
764:
765: /* XXX: should we preserve set[ug]id? */
766: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
767: mode = S_IWRITE | (a->perm & 0777);
768: else
769: mode = 0666;
770:
1.14 djm 771: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
772: (a->perm & S_IFDIR)) {
773: error("Cannot download a directory: %s", remote_path);
774: return(-1);
775: }
776:
1.21 djm 777: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
778: size = a->size;
779: else
780: size = 0;
781:
1.23 djm 782: buflen = conn->transfer_buflen;
1.1 djm 783: buffer_init(&msg);
784:
785: /* Send open request */
1.23 djm 786: id = conn->msg_id++;
1.1 djm 787: buffer_put_char(&msg, SSH2_FXP_OPEN);
788: buffer_put_int(&msg, id);
789: buffer_put_cstring(&msg, remote_path);
790: buffer_put_int(&msg, SSH2_FXF_READ);
791: attrib_clear(&junk); /* Send empty attributes */
792: encode_attrib(&msg, &junk);
1.23 djm 793: send_msg(conn->fd_out, &msg);
1.33 ! deraadt 794: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 795:
1.23 djm 796: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 797: if (handle == NULL) {
798: buffer_free(&msg);
799: return(-1);
800: }
801:
1.23 djm 802: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
803: if (local_fd == -1) {
804: error("Couldn't open local file \"%s\" for writing: %s",
805: local_path, strerror(errno));
1.24 markus 806: buffer_free(&msg);
807: xfree(handle);
1.23 djm 808: return(-1);
809: }
810:
1.1 djm 811: /* Read from remote and write to local */
1.21 djm 812: write_error = read_error = write_errno = num_req = offset = 0;
813: max_req = 1;
814: while (num_req > 0 || max_req > 0) {
815: char *data;
1.1 djm 816: u_int len;
817:
1.21 djm 818: /* Send some more requests */
819: while (num_req < max_req) {
1.28 markus 820: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 821: (unsigned long long)offset,
822: (unsigned long long)offset + buflen - 1,
823: num_req, max_req);
1.21 djm 824: req = xmalloc(sizeof(*req));
1.23 djm 825: req->id = conn->msg_id++;
1.21 djm 826: req->len = buflen;
827: req->offset = offset;
828: offset += buflen;
829: num_req++;
830: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 831: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 832: req->len, handle, handle_len);
833: }
1.1 djm 834:
835: buffer_clear(&msg);
1.23 djm 836: get_msg(conn->fd_in, &msg);
1.1 djm 837: type = buffer_get_char(&msg);
838: id = buffer_get_int(&msg);
1.33 ! deraadt 839: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 840:
841: /* Find the request in our queue */
842: for(req = TAILQ_FIRST(&requests);
843: req != NULL && req->id != id;
844: req = TAILQ_NEXT(req, tq))
845: ;
846: if (req == NULL)
847: fatal("Unexpected reply %u", id);
848:
849: switch (type) {
850: case SSH2_FXP_STATUS:
1.5 djm 851: status = buffer_get_int(&msg);
1.21 djm 852: if (status != SSH2_FX_EOF)
853: read_error = 1;
854: max_req = 0;
855: TAILQ_REMOVE(&requests, req, tq);
856: xfree(req);
857: num_req--;
858: break;
859: case SSH2_FXP_DATA:
860: data = buffer_get_string(&msg, &len);
1.26 itojun 861: debug3("Received data %llu -> %llu",
1.28 markus 862: (unsigned long long)req->offset,
1.26 itojun 863: (unsigned long long)req->offset + len - 1);
1.21 djm 864: if (len > req->len)
865: fatal("Received more data than asked for "
1.33 ! deraadt 866: "%u > %u", len, req->len);
1.21 djm 867: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
868: atomicio(write, local_fd, data, len) != len) &&
869: !write_error) {
870: write_errno = errno;
871: write_error = 1;
872: max_req = 0;
873: }
874: xfree(data);
1.1 djm 875:
1.21 djm 876: if (len == req->len) {
877: TAILQ_REMOVE(&requests, req, tq);
878: xfree(req);
879: num_req--;
880: } else {
881: /* Resend the request for the missing data */
882: debug3("Short data block, re-requesting "
1.26 itojun 883: "%llu -> %llu (%2d)",
1.28 markus 884: (unsigned long long)req->offset + len,
1.27 itojun 885: (unsigned long long)req->offset +
886: req->len - 1, num_req);
1.23 djm 887: req->id = conn->msg_id++;
1.21 djm 888: req->len -= len;
889: req->offset += len;
1.28 markus 890: send_read_request(conn->fd_out, req->id,
1.23 djm 891: req->offset, req->len, handle, handle_len);
1.21 djm 892: /* Reduce the request size */
893: if (len < buflen)
894: buflen = MAX(MIN_READ_SIZE, len);
895: }
896: if (max_req > 0) { /* max_req = 0 iff EOF received */
897: if (size > 0 && offset > size) {
898: /* Only one request at a time
899: * after the expected EOF */
900: debug3("Finish at %llu (%2d)",
1.26 itojun 901: (unsigned long long)offset,
902: num_req);
1.21 djm 903: max_req = 1;
904: }
1.23 djm 905: else if (max_req < conn->num_requests + 1) {
1.21 djm 906: ++max_req;
907: }
1.1 djm 908: }
1.21 djm 909: break;
910: default:
1.33 ! deraadt 911: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 912: SSH2_FXP_DATA, type);
913: }
1.21 djm 914: }
1.1 djm 915:
1.21 djm 916: /* Sanity check */
917: if (TAILQ_FIRST(&requests) != NULL)
918: fatal("Transfer complete, but requests still in queue");
919:
920: if (read_error) {
1.28 markus 921: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 922: remote_path, fx2txt(status));
1.23 djm 923: do_close(conn, handle, handle_len);
1.21 djm 924: } else if (write_error) {
925: error("Couldn't write to \"%s\": %s", local_path,
926: strerror(write_errno));
927: status = -1;
1.23 djm 928: do_close(conn, handle, handle_len);
1.21 djm 929: } else {
1.23 djm 930: status = do_close(conn, handle, handle_len);
1.21 djm 931:
932: /* Override umask and utimes if asked */
933: if (pflag && fchmod(local_fd, mode) == -1)
934: error("Couldn't set mode on \"%s\": %s", local_path,
935: strerror(errno));
936: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
937: struct timeval tv[2];
938: tv[0].tv_sec = a->atime;
939: tv[1].tv_sec = a->mtime;
940: tv[0].tv_usec = tv[1].tv_usec = 0;
941: if (utimes(local_path, tv) == -1)
942: error("Can't set times on \"%s\": %s",
943: local_path, strerror(errno));
1.1 djm 944: }
1.10 djm 945: }
1.5 djm 946: close(local_fd);
947: buffer_free(&msg);
1.1 djm 948: xfree(handle);
1.23 djm 949:
950: return(status);
1.1 djm 951: }
952:
953: int
1.23 djm 954: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
955: int pflag)
1.1 djm 956: {
1.20 djm 957: int local_fd, status;
1.22 djm 958: u_int handle_len, id, type;
1.1 djm 959: u_int64_t offset;
1.20 djm 960: char *handle, *data;
1.1 djm 961: Buffer msg;
962: struct stat sb;
963: Attrib a;
1.21 djm 964: u_int32_t startid;
965: u_int32_t ackid;
1.22 djm 966: struct outstanding_ack {
967: u_int id;
968: u_int len;
969: u_int64_t offset;
1.28 markus 970: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 971: };
972: TAILQ_HEAD(ackhead, outstanding_ack) acks;
973: struct outstanding_ack *ack;
974:
975: TAILQ_INIT(&acks);
1.1 djm 976:
977: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
978: error("Couldn't open local file \"%s\" for reading: %s",
979: local_path, strerror(errno));
980: return(-1);
981: }
982: if (fstat(local_fd, &sb) == -1) {
983: error("Couldn't fstat local file \"%s\": %s",
984: local_path, strerror(errno));
985: close(local_fd);
986: return(-1);
987: }
988: stat_to_attrib(&sb, &a);
989:
990: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
991: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
992: a.perm &= 0777;
993: if (!pflag)
994: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
995:
996: buffer_init(&msg);
997:
998: /* Send open request */
1.23 djm 999: id = conn->msg_id++;
1.1 djm 1000: buffer_put_char(&msg, SSH2_FXP_OPEN);
1001: buffer_put_int(&msg, id);
1002: buffer_put_cstring(&msg, remote_path);
1003: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1004: encode_attrib(&msg, &a);
1.23 djm 1005: send_msg(conn->fd_out, &msg);
1.33 ! deraadt 1006: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1007:
1008: buffer_clear(&msg);
1009:
1.23 djm 1010: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1011: if (handle == NULL) {
1012: close(local_fd);
1013: buffer_free(&msg);
1014: return(-1);
1015: }
1016:
1.21 djm 1017: startid = ackid = id + 1;
1.23 djm 1018: data = xmalloc(conn->transfer_buflen);
1.20 djm 1019:
1.1 djm 1020: /* Read from local and write to remote */
1021: offset = 0;
1.19 deraadt 1022: for (;;) {
1.1 djm 1023: int len;
1024:
1025: /*
1026: * Can't use atomicio here because it returns 0 on EOF, thus losing
1027: * the last block of the file
1028: */
1029: do
1.23 djm 1030: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1031: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1032:
1033: if (len == -1)
1034: fatal("Couldn't read from \"%s\": %s", local_path,
1035: strerror(errno));
1.21 djm 1036:
1037: if (len != 0) {
1.22 djm 1038: ack = xmalloc(sizeof(*ack));
1039: ack->id = ++id;
1040: ack->offset = offset;
1041: ack->len = len;
1042: TAILQ_INSERT_TAIL(&acks, ack, tq);
1043:
1.21 djm 1044: buffer_clear(&msg);
1045: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1046: buffer_put_int(&msg, ack->id);
1.21 djm 1047: buffer_put_string(&msg, handle, handle_len);
1048: buffer_put_int64(&msg, offset);
1049: buffer_put_string(&msg, data, len);
1.23 djm 1050: send_msg(conn->fd_out, &msg);
1.33 ! deraadt 1051: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.26 itojun 1052: id, (unsigned long long)offset, len);
1.22 djm 1053: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1054: break;
1055:
1.22 djm 1056: if (ack == NULL)
1057: fatal("Unexpected ACK %u", id);
1058:
1.28 markus 1059: if (id == startid || len == 0 ||
1.23 djm 1060: id - ackid >= conn->num_requests) {
1.32 markus 1061: u_int r_id;
1.31 djm 1062:
1.22 djm 1063: buffer_clear(&msg);
1.23 djm 1064: get_msg(conn->fd_in, &msg);
1.22 djm 1065: type = buffer_get_char(&msg);
1.31 djm 1066: r_id = buffer_get_int(&msg);
1.22 djm 1067:
1068: if (type != SSH2_FXP_STATUS)
1069: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1070: "got %d", SSH2_FXP_STATUS, type);
1071:
1072: status = buffer_get_int(&msg);
1073: debug3("SSH2_FXP_STATUS %d", status);
1074:
1075: /* Find the request in our queue */
1076: for(ack = TAILQ_FIRST(&acks);
1.31 djm 1077: ack != NULL && ack->id != r_id;
1.22 djm 1078: ack = TAILQ_NEXT(ack, tq))
1079: ;
1080: if (ack == NULL)
1.33 ! deraadt 1081: fatal("Can't find request for ID %u", r_id);
1.22 djm 1082: TAILQ_REMOVE(&acks, ack, tq);
1083:
1.21 djm 1084: if (status != SSH2_FX_OK) {
1085: error("Couldn't write to remote file \"%s\": %s",
1086: remote_path, fx2txt(status));
1.23 djm 1087: do_close(conn, handle, handle_len);
1.21 djm 1088: close(local_fd);
1089: goto done;
1090: }
1.33 ! deraadt 1091: debug3("In write loop, ack for %u %u bytes at %llu",
1.26 itojun 1092: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1093: ++ackid;
1.22 djm 1094: free(ack);
1.1 djm 1095: }
1096: offset += len;
1097: }
1.20 djm 1098: xfree(data);
1.1 djm 1099:
1100: if (close(local_fd) == -1) {
1101: error("Couldn't close local file \"%s\": %s", local_path,
1102: strerror(errno));
1.23 djm 1103: do_close(conn, handle, handle_len);
1.5 djm 1104: status = -1;
1105: goto done;
1.1 djm 1106: }
1107:
1.10 djm 1108: /* Override umask and utimes if asked */
1109: if (pflag)
1.23 djm 1110: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1111:
1.23 djm 1112: status = do_close(conn, handle, handle_len);
1.5 djm 1113:
1114: done:
1115: xfree(handle);
1116: buffer_free(&msg);
1.23 djm 1117: return(status);
1.1 djm 1118: }
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