Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.18.2.5
1.1 djm 1: /*
1.18.2.1 jason 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 */
1.18.2.1 jason 27: /* XXX: remove all logging, only return status codes */
1.1 djm 28: /* XXX: copy between two remote sites */
29:
30: #include "includes.h"
1.18.2.5! miod 31: RCSID("$OpenBSD: sftp-client.c,v 1.35 2002/09/11 22:41:49 djm Exp $");
1.18.2.1 jason 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:
1.18.2.1 jason 46: /* Minimum amount of data to read at at time */
47: #define MIN_READ_SIZE 512
1.1 djm 48:
1.18.2.1 jason 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)
1.18.2.4 miod 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);
1.18.2.4 miod 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);
1.18.2.4 miod 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
1.18.2.4 miod 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)
1.18.2.4 miod 148: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 149: if (type != SSH2_FXP_STATUS)
1.18.2.4 miod 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:
1.18.2.4 miod 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)
1.18.2.4 miod 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)
1.18.2.4 miod 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:
1.18.2.4 miod 203: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 204: if (id != expected_id)
1.18.2.4 miod 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) {
1.18.2.4 miod 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:
1.18.2.1 jason 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: {
1.18.2.4 miod 227: u_int type;
228: int version;
1.1 djm 229: Buffer msg;
1.18.2.1 jason 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) {
1.18.2.4 miod 243: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 244: type);
245: buffer_free(&msg);
1.18.2.1 jason 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:
1.18.2.1 jason 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)
1.18.2.2 miod 274: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.18.2.1 jason 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
1.18.2.1 jason 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:
1.18.2.1 jason 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);
1.18.2.1 jason 297: send_msg(conn->fd_out, &msg);
1.18.2.4 miod 298: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 299:
1.18.2.1 jason 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
1.18.2.1 jason 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:
1.18.2.1 jason 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);
1.18.2.1 jason 324: send_msg(conn->fd_out, &msg);
1.1 djm 325:
326: buffer_clear(&msg);
327:
1.18.2.1 jason 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:
1.18.2.1 jason 338: for (;;) {
1.1 djm 339: int count;
340:
1.18.2.1 jason 341: id = expected_id = conn->msg_id++;
1.1 djm 342:
1.18.2.4 miod 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);
1.18.2.1 jason 349: send_msg(conn->fd_out, &msg);
1.1 djm 350:
351: buffer_clear(&msg);
352:
1.18.2.1 jason 353: get_msg(conn->fd_in, &msg);
1.1 djm 354:
355: type = buffer_get_char(&msg);
356: id = buffer_get_int(&msg);
357:
1.18.2.4 miod 358: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 359:
360: if (id != expected_id)
1.18.2.4 miod 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));
1.18.2.1 jason 373: do_close(conn, handle, handle_len);
1.9 djm 374: return(status);
1.1 djm 375: }
376: } else if (type != SSH2_FXP_NAME)
1.18.2.4 miod 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);
1.18.2.1 jason 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);
1.18.2.1 jason 411: do_close(conn, handle, handle_len);
1.1 djm 412: xfree(handle);
413:
414: return(0);
415: }
416:
417: int
1.18.2.1 jason 418: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 419: {
1.18.2.1 jason 420: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 421: }
422:
423: void free_sftp_dirents(SFTP_DIRENT **s)
424: {
425: int i;
1.18.2.1 jason 426:
427: for (i = 0; s[i]; i++) {
1.12 djm 428: xfree(s[i]->filename);
429: xfree(s[i]->longname);
430: xfree(s[i]);
431: }
432: xfree(s);
433: }
434:
435: int
1.18.2.1 jason 436: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 437: {
438: u_int status, id;
439:
440: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
441:
1.18.2.1 jason 442: id = conn->msg_id++;
1.18.2.2 miod 443: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.18.2.1 jason 444: strlen(path));
445: status = get_status(conn->fd_in, id);
1.1 djm 446: if (status != SSH2_FX_OK)
447: error("Couldn't delete file: %s", fx2txt(status));
448: return(status);
449: }
450:
451: int
1.18.2.1 jason 452: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 453: {
454: u_int status, id;
455:
1.18.2.1 jason 456: id = conn->msg_id++;
457: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 458: strlen(path), a);
459:
1.18.2.1 jason 460: status = get_status(conn->fd_in, id);
1.1 djm 461: if (status != SSH2_FX_OK)
462: error("Couldn't create directory: %s", fx2txt(status));
463:
464: return(status);
465: }
466:
467: int
1.18.2.1 jason 468: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 469: {
470: u_int status, id;
471:
1.18.2.1 jason 472: id = conn->msg_id++;
473: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
474: strlen(path));
1.1 djm 475:
1.18.2.1 jason 476: status = get_status(conn->fd_in, id);
1.1 djm 477: if (status != SSH2_FX_OK)
478: error("Couldn't remove directory: %s", fx2txt(status));
479:
480: return(status);
481: }
482:
483: Attrib *
1.18.2.1 jason 484: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 485: {
486: u_int id;
487:
1.18.2.1 jason 488: id = conn->msg_id++;
489:
1.18.2.2 miod 490: send_string_request(conn->fd_out, id,
491: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.18.2.1 jason 492: path, strlen(path));
493:
494: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 495: }
496:
497: Attrib *
1.18.2.1 jason 498: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 499: {
500: u_int id;
501:
1.18.2.1 jason 502: if (conn->version == 0) {
503: if (quiet)
504: debug("Server version does not support lstat operation");
505: else
1.18.2.2 miod 506: log("Server version does not support lstat operation");
507: return(do_stat(conn, path, quiet));
1.18.2.1 jason 508: }
509:
510: id = conn->msg_id++;
511: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
512: strlen(path));
513:
514: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 515: }
516:
517: Attrib *
1.18.2.1 jason 518: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 519: {
520: u_int id;
521:
1.18.2.1 jason 522: id = conn->msg_id++;
523: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
524: handle_len);
525:
526: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 527: }
528:
529: int
1.18.2.1 jason 530: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 531: {
532: u_int status, id;
533:
1.18.2.1 jason 534: id = conn->msg_id++;
535: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 536: strlen(path), a);
537:
1.18.2.1 jason 538: status = get_status(conn->fd_in, id);
1.1 djm 539: if (status != SSH2_FX_OK)
540: error("Couldn't setstat on \"%s\": %s", path,
541: fx2txt(status));
542:
543: return(status);
544: }
545:
546: int
1.18.2.1 jason 547: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 548: Attrib *a)
549: {
550: u_int status, id;
551:
1.18.2.1 jason 552: id = conn->msg_id++;
553: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 554: handle_len, a);
555:
1.18.2.1 jason 556: status = get_status(conn->fd_in, id);
1.1 djm 557: if (status != SSH2_FX_OK)
558: error("Couldn't fsetstat: %s", fx2txt(status));
559:
560: return(status);
561: }
562:
563: char *
1.18.2.1 jason 564: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 565: {
566: Buffer msg;
567: u_int type, expected_id, count, id;
568: char *filename, *longname;
569: Attrib *a;
570:
1.18.2.1 jason 571: expected_id = id = conn->msg_id++;
572: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
573: strlen(path));
1.1 djm 574:
575: buffer_init(&msg);
576:
1.18.2.1 jason 577: get_msg(conn->fd_in, &msg);
1.1 djm 578: type = buffer_get_char(&msg);
579: id = buffer_get_int(&msg);
580:
581: if (id != expected_id)
1.18.2.4 miod 582: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 583:
584: if (type == SSH2_FXP_STATUS) {
585: u_int status = buffer_get_int(&msg);
586:
587: error("Couldn't canonicalise: %s", fx2txt(status));
588: return(NULL);
589: } else if (type != SSH2_FXP_NAME)
1.18.2.4 miod 590: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 591: SSH2_FXP_NAME, type);
592:
593: count = buffer_get_int(&msg);
594: if (count != 1)
595: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
596:
597: filename = buffer_get_string(&msg, NULL);
598: longname = buffer_get_string(&msg, NULL);
599: a = decode_attrib(&msg);
600:
601: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
602:
603: xfree(longname);
604:
605: buffer_free(&msg);
606:
607: return(filename);
608: }
609:
610: int
1.18.2.1 jason 611: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 612: {
613: Buffer msg;
614: u_int status, id;
615:
616: buffer_init(&msg);
617:
618: /* Send rename request */
1.18.2.1 jason 619: id = conn->msg_id++;
1.1 djm 620: buffer_put_char(&msg, SSH2_FXP_RENAME);
621: buffer_put_int(&msg, id);
622: buffer_put_cstring(&msg, oldpath);
623: buffer_put_cstring(&msg, newpath);
1.18.2.1 jason 624: send_msg(conn->fd_out, &msg);
1.1 djm 625: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
626: newpath);
627: buffer_free(&msg);
628:
1.18.2.1 jason 629: status = get_status(conn->fd_in, id);
1.1 djm 630: if (status != SSH2_FX_OK)
1.18.2.1 jason 631: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
632: newpath, fx2txt(status));
1.1 djm 633:
634: return(status);
1.11 djm 635: }
636:
637: int
1.18.2.1 jason 638: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 639: {
640: Buffer msg;
641: u_int status, id;
642:
1.18.2.1 jason 643: if (conn->version < 3) {
644: error("This server does not support the symlink operation");
645: return(SSH2_FX_OP_UNSUPPORTED);
646: }
647:
1.11 djm 648: buffer_init(&msg);
649:
650: /* Send rename request */
1.18.2.1 jason 651: id = conn->msg_id++;
1.11 djm 652: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
653: buffer_put_int(&msg, id);
654: buffer_put_cstring(&msg, oldpath);
655: buffer_put_cstring(&msg, newpath);
1.18.2.1 jason 656: send_msg(conn->fd_out, &msg);
1.11 djm 657: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
658: newpath);
659: buffer_free(&msg);
660:
1.18.2.1 jason 661: status = get_status(conn->fd_in, id);
1.11 djm 662: if (status != SSH2_FX_OK)
1.18.2.1 jason 663: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
664: newpath, fx2txt(status));
1.11 djm 665:
666: return(status);
667: }
668:
669: char *
1.18.2.1 jason 670: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 671: {
672: Buffer msg;
673: u_int type, expected_id, count, id;
674: char *filename, *longname;
675: Attrib *a;
676:
1.18.2.1 jason 677: expected_id = id = conn->msg_id++;
678: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
679: strlen(path));
1.11 djm 680:
681: buffer_init(&msg);
682:
1.18.2.1 jason 683: get_msg(conn->fd_in, &msg);
1.11 djm 684: type = buffer_get_char(&msg);
685: id = buffer_get_int(&msg);
686:
687: if (id != expected_id)
1.18.2.4 miod 688: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 689:
690: if (type == SSH2_FXP_STATUS) {
691: u_int status = buffer_get_int(&msg);
692:
693: error("Couldn't readlink: %s", fx2txt(status));
694: return(NULL);
695: } else if (type != SSH2_FXP_NAME)
1.18.2.4 miod 696: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 697: SSH2_FXP_NAME, type);
698:
699: count = buffer_get_int(&msg);
700: if (count != 1)
701: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
702:
703: filename = buffer_get_string(&msg, NULL);
704: longname = buffer_get_string(&msg, NULL);
705: a = decode_attrib(&msg);
706:
707: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
708:
709: xfree(longname);
710:
711: buffer_free(&msg);
712:
713: return(filename);
1.1 djm 714: }
715:
1.18.2.1 jason 716: static void
717: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
718: char *handle, u_int handle_len)
719: {
720: Buffer msg;
1.18.2.2 miod 721:
1.18.2.1 jason 722: buffer_init(&msg);
723: buffer_clear(&msg);
724: buffer_put_char(&msg, SSH2_FXP_READ);
725: buffer_put_int(&msg, id);
726: buffer_put_string(&msg, handle, handle_len);
727: buffer_put_int64(&msg, offset);
728: buffer_put_int(&msg, len);
729: send_msg(fd_out, &msg);
730: buffer_free(&msg);
1.18.2.2 miod 731: }
1.18.2.1 jason 732:
1.1 djm 733: int
1.18.2.1 jason 734: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
1.1 djm 735: int pflag)
736: {
737: Attrib junk, *a;
1.18.2.1 jason 738: Buffer msg;
739: char *handle;
740: int local_fd, status, num_req, max_req, write_error;
741: int read_error, write_errno;
742: u_int64_t offset, size;
743: u_int handle_len, mode, type, id, buflen;
744: struct request {
745: u_int id;
746: u_int len;
747: u_int64_t offset;
1.18.2.2 miod 748: TAILQ_ENTRY(request) tq;
1.18.2.1 jason 749: };
750: TAILQ_HEAD(reqhead, request) requests;
751: struct request *req;
1.1 djm 752:
1.18.2.1 jason 753: TAILQ_INIT(&requests);
754:
755: a = do_stat(conn, remote_path, 0);
1.1 djm 756: if (a == NULL)
757: return(-1);
758:
759: /* XXX: should we preserve set[ug]id? */
760: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
761: mode = S_IWRITE | (a->perm & 0777);
762: else
763: mode = 0666;
764:
1.14 djm 765: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
766: (a->perm & S_IFDIR)) {
767: error("Cannot download a directory: %s", remote_path);
768: return(-1);
769: }
770:
1.18.2.1 jason 771: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
772: size = a->size;
773: else
774: size = 0;
1.1 djm 775:
1.18.2.1 jason 776: buflen = conn->transfer_buflen;
1.1 djm 777: buffer_init(&msg);
778:
779: /* Send open request */
1.18.2.1 jason 780: id = conn->msg_id++;
1.1 djm 781: buffer_put_char(&msg, SSH2_FXP_OPEN);
782: buffer_put_int(&msg, id);
783: buffer_put_cstring(&msg, remote_path);
784: buffer_put_int(&msg, SSH2_FXF_READ);
785: attrib_clear(&junk); /* Send empty attributes */
786: encode_attrib(&msg, &junk);
1.18.2.1 jason 787: send_msg(conn->fd_out, &msg);
1.18.2.4 miod 788: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 789:
1.18.2.1 jason 790: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 791: if (handle == NULL) {
792: buffer_free(&msg);
1.18.2.1 jason 793: return(-1);
794: }
795:
796: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
797: if (local_fd == -1) {
798: error("Couldn't open local file \"%s\" for writing: %s",
799: local_path, strerror(errno));
800: buffer_free(&msg);
801: xfree(handle);
1.1 djm 802: return(-1);
803: }
804:
805: /* Read from remote and write to local */
1.18.2.1 jason 806: write_error = read_error = write_errno = num_req = offset = 0;
807: max_req = 1;
808: while (num_req > 0 || max_req > 0) {
1.1 djm 809: char *data;
1.18.2.1 jason 810: u_int len;
1.1 djm 811:
1.18.2.1 jason 812: /* Send some more requests */
813: while (num_req < max_req) {
1.18.2.2 miod 814: debug3("Request range %llu -> %llu (%d/%d)",
815: (unsigned long long)offset,
816: (unsigned long long)offset + buflen - 1,
817: num_req, max_req);
1.18.2.1 jason 818: req = xmalloc(sizeof(*req));
819: req->id = conn->msg_id++;
820: req->len = buflen;
821: req->offset = offset;
822: offset += buflen;
823: num_req++;
824: TAILQ_INSERT_TAIL(&requests, req, tq);
1.18.2.2 miod 825: send_read_request(conn->fd_out, req->id, req->offset,
1.18.2.1 jason 826: req->len, handle, handle_len);
827: }
1.1 djm 828:
829: buffer_clear(&msg);
1.18.2.1 jason 830: get_msg(conn->fd_in, &msg);
1.1 djm 831: type = buffer_get_char(&msg);
832: id = buffer_get_int(&msg);
1.18.2.4 miod 833: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.18.2.1 jason 834:
835: /* Find the request in our queue */
836: for(req = TAILQ_FIRST(&requests);
837: req != NULL && req->id != id;
838: req = TAILQ_NEXT(req, tq))
839: ;
840: if (req == NULL)
841: fatal("Unexpected reply %u", id);
842:
843: switch (type) {
844: case SSH2_FXP_STATUS:
1.5 djm 845: status = buffer_get_int(&msg);
1.18.2.1 jason 846: if (status != SSH2_FX_EOF)
847: read_error = 1;
848: max_req = 0;
849: TAILQ_REMOVE(&requests, req, tq);
850: xfree(req);
851: num_req--;
852: break;
853: case SSH2_FXP_DATA:
854: data = buffer_get_string(&msg, &len);
1.18.2.2 miod 855: debug3("Received data %llu -> %llu",
856: (unsigned long long)req->offset,
857: (unsigned long long)req->offset + len - 1);
1.18.2.1 jason 858: if (len > req->len)
859: fatal("Received more data than asked for "
1.18.2.4 miod 860: "%u > %u", len, req->len);
1.18.2.1 jason 861: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
862: atomicio(write, local_fd, data, len) != len) &&
863: !write_error) {
864: write_errno = errno;
865: write_error = 1;
866: max_req = 0;
867: }
868: xfree(data);
1.1 djm 869:
1.18.2.1 jason 870: if (len == req->len) {
871: TAILQ_REMOVE(&requests, req, tq);
872: xfree(req);
873: num_req--;
874: } else {
875: /* Resend the request for the missing data */
876: debug3("Short data block, re-requesting "
1.18.2.2 miod 877: "%llu -> %llu (%2d)",
878: (unsigned long long)req->offset + len,
879: (unsigned long long)req->offset +
880: req->len - 1, num_req);
1.18.2.1 jason 881: req->id = conn->msg_id++;
882: req->len -= len;
883: req->offset += len;
1.18.2.2 miod 884: send_read_request(conn->fd_out, req->id,
1.18.2.1 jason 885: req->offset, req->len, handle, handle_len);
886: /* Reduce the request size */
887: if (len < buflen)
888: buflen = MAX(MIN_READ_SIZE, len);
1.1 djm 889: }
1.18.2.1 jason 890: if (max_req > 0) { /* max_req = 0 iff EOF received */
891: if (size > 0 && offset > size) {
892: /* Only one request at a time
893: * after the expected EOF */
894: debug3("Finish at %llu (%2d)",
1.18.2.2 miod 895: (unsigned long long)offset,
896: num_req);
1.18.2.1 jason 897: max_req = 1;
898: }
899: else if (max_req < conn->num_requests + 1) {
900: ++max_req;
901: }
902: }
903: break;
904: default:
1.18.2.4 miod 905: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 906: SSH2_FXP_DATA, type);
907: }
908: }
1.5 djm 909:
1.18.2.1 jason 910: /* Sanity check */
911: if (TAILQ_FIRST(&requests) != NULL)
912: fatal("Transfer complete, but requests still in queue");
913:
914: if (read_error) {
1.18.2.2 miod 915: error("Couldn't read from remote file \"%s\" : %s",
1.18.2.1 jason 916: remote_path, fx2txt(status));
917: do_close(conn, handle, handle_len);
918: } else if (write_error) {
919: error("Couldn't write to \"%s\": %s", local_path,
920: strerror(write_errno));
921: status = -1;
922: do_close(conn, handle, handle_len);
923: } else {
924: status = do_close(conn, handle, handle_len);
925:
926: /* Override umask and utimes if asked */
927: if (pflag && fchmod(local_fd, mode) == -1)
928: error("Couldn't set mode on \"%s\": %s", local_path,
929: strerror(errno));
930: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
931: struct timeval tv[2];
932: tv[0].tv_sec = a->atime;
933: tv[1].tv_sec = a->mtime;
934: tv[0].tv_usec = tv[1].tv_usec = 0;
935: if (utimes(local_path, tv) == -1)
936: error("Can't set times on \"%s\": %s",
937: local_path, strerror(errno));
938: }
1.10 djm 939: }
1.5 djm 940: close(local_fd);
941: buffer_free(&msg);
1.1 djm 942: xfree(handle);
1.18.2.1 jason 943:
944: return(status);
1.1 djm 945: }
946:
947: int
1.18.2.1 jason 948: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
1.1 djm 949: int pflag)
950: {
1.18.2.1 jason 951: int local_fd, status;
952: u_int handle_len, id, type;
1.1 djm 953: u_int64_t offset;
1.18.2.1 jason 954: char *handle, *data;
1.1 djm 955: Buffer msg;
956: struct stat sb;
957: Attrib a;
1.18.2.1 jason 958: u_int32_t startid;
959: u_int32_t ackid;
960: struct outstanding_ack {
961: u_int id;
962: u_int len;
963: u_int64_t offset;
1.18.2.2 miod 964: TAILQ_ENTRY(outstanding_ack) tq;
1.18.2.1 jason 965: };
966: TAILQ_HEAD(ackhead, outstanding_ack) acks;
967: struct outstanding_ack *ack;
968:
969: TAILQ_INIT(&acks);
1.1 djm 970:
971: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
972: error("Couldn't open local file \"%s\" for reading: %s",
973: local_path, strerror(errno));
974: return(-1);
975: }
976: if (fstat(local_fd, &sb) == -1) {
977: error("Couldn't fstat local file \"%s\": %s",
978: local_path, strerror(errno));
979: close(local_fd);
980: return(-1);
981: }
982: stat_to_attrib(&sb, &a);
983:
984: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
985: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
986: a.perm &= 0777;
987: if (!pflag)
988: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
989:
990: buffer_init(&msg);
991:
992: /* Send open request */
1.18.2.1 jason 993: id = conn->msg_id++;
1.1 djm 994: buffer_put_char(&msg, SSH2_FXP_OPEN);
995: buffer_put_int(&msg, id);
996: buffer_put_cstring(&msg, remote_path);
997: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
998: encode_attrib(&msg, &a);
1.18.2.1 jason 999: send_msg(conn->fd_out, &msg);
1.18.2.4 miod 1000: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1001:
1002: buffer_clear(&msg);
1003:
1.18.2.1 jason 1004: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1005: if (handle == NULL) {
1006: close(local_fd);
1007: buffer_free(&msg);
1008: return(-1);
1009: }
1010:
1.18.2.1 jason 1011: startid = ackid = id + 1;
1012: data = xmalloc(conn->transfer_buflen);
1013:
1.1 djm 1014: /* Read from local and write to remote */
1015: offset = 0;
1.18.2.1 jason 1016: for (;;) {
1.1 djm 1017: int len;
1018:
1019: /*
1020: * Can't use atomicio here because it returns 0 on EOF, thus losing
1021: * the last block of the file
1022: */
1023: do
1.18.2.1 jason 1024: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1025: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1026:
1027: if (len == -1)
1028: fatal("Couldn't read from \"%s\": %s", local_path,
1029: strerror(errno));
1.18.2.1 jason 1030:
1031: if (len != 0) {
1032: ack = xmalloc(sizeof(*ack));
1033: ack->id = ++id;
1034: ack->offset = offset;
1035: ack->len = len;
1036: TAILQ_INSERT_TAIL(&acks, ack, tq);
1037:
1038: buffer_clear(&msg);
1039: buffer_put_char(&msg, SSH2_FXP_WRITE);
1040: buffer_put_int(&msg, ack->id);
1041: buffer_put_string(&msg, handle, handle_len);
1042: buffer_put_int64(&msg, offset);
1043: buffer_put_string(&msg, data, len);
1044: send_msg(conn->fd_out, &msg);
1.18.2.4 miod 1045: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.18.2.2 miod 1046: id, (unsigned long long)offset, len);
1.18.2.1 jason 1047: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1048: break;
1049:
1.18.2.1 jason 1050: if (ack == NULL)
1051: fatal("Unexpected ACK %u", id);
1052:
1.18.2.2 miod 1053: if (id == startid || len == 0 ||
1.18.2.1 jason 1054: id - ackid >= conn->num_requests) {
1.18.2.3 miod 1055: u_int r_id;
1.18.2.2 miod 1056:
1.18.2.1 jason 1057: buffer_clear(&msg);
1058: get_msg(conn->fd_in, &msg);
1059: type = buffer_get_char(&msg);
1.18.2.2 miod 1060: r_id = buffer_get_int(&msg);
1.18.2.1 jason 1061:
1062: if (type != SSH2_FXP_STATUS)
1063: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1064: "got %d", SSH2_FXP_STATUS, type);
1.1 djm 1065:
1.18.2.1 jason 1066: status = buffer_get_int(&msg);
1067: debug3("SSH2_FXP_STATUS %d", status);
1068:
1069: /* Find the request in our queue */
1070: for(ack = TAILQ_FIRST(&acks);
1.18.2.2 miod 1071: ack != NULL && ack->id != r_id;
1.18.2.1 jason 1072: ack = TAILQ_NEXT(ack, tq))
1073: ;
1074: if (ack == NULL)
1.18.2.4 miod 1075: fatal("Can't find request for ID %u", r_id);
1.18.2.1 jason 1076: TAILQ_REMOVE(&acks, ack, tq);
1077:
1078: if (status != SSH2_FX_OK) {
1079: error("Couldn't write to remote file \"%s\": %s",
1080: remote_path, fx2txt(status));
1081: do_close(conn, handle, handle_len);
1082: close(local_fd);
1083: goto done;
1084: }
1.18.2.4 miod 1085: debug3("In write loop, ack for %u %u bytes at %llu",
1.18.2.2 miod 1086: ack->id, ack->len, (unsigned long long)ack->offset);
1.18.2.1 jason 1087: ++ackid;
1.18.2.5! miod 1088: xfree(ack);
1.18.2.1 jason 1089: }
1.1 djm 1090: offset += len;
1091: }
1.18.2.1 jason 1092: xfree(data);
1.1 djm 1093:
1094: if (close(local_fd) == -1) {
1095: error("Couldn't close local file \"%s\": %s", local_path,
1096: strerror(errno));
1.18.2.1 jason 1097: do_close(conn, handle, handle_len);
1.5 djm 1098: status = -1;
1099: goto done;
1.1 djm 1100: }
1101:
1.10 djm 1102: /* Override umask and utimes if asked */
1103: if (pflag)
1.18.2.1 jason 1104: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1105:
1.18.2.1 jason 1106: status = do_close(conn, handle, handle_len);
1.5 djm 1107:
1108: done:
1109: xfree(handle);
1110: buffer_free(&msg);
1.18.2.1 jason 1111: return(status);
1.1 djm 1112: }
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