Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.16.2.3
1.1 djm 1: /*
1.16.2.2 miod 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 */
1.16.2.2 miod 27: /* XXX: remove all logging, only return status codes */
1.1 djm 28: /* XXX: copy between two remote sites */
29:
30: #include "includes.h"
1.16.2.3! miod 31: RCSID("$OpenBSD: sftp-client.c,v 1.31 2002/04/06 00:30:08 djm Exp $");
1.16.2.2 miod 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:
1.16.2.2 miod 46: /* Minimum amount of data to read at at time */
47: #define MIN_READ_SIZE 512
1.1 djm 48:
1.16.2.2 miod 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:
1.16.2.1 jason 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:
1.16.2.1 jason 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)
91: fatal("Received message too long %d", msg_len);
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:
1.16.2.1 jason 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);
116: debug3("Sent message fd %d T:%d I:%d", fd, code, id);
117: buffer_free(&msg);
118: }
119:
1.16.2.1 jason 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);
132: debug3("Sent message fd %d T:%d I:%d", fd, code, id);
133: buffer_free(&msg);
134: }
135:
1.16.2.1 jason 136: static u_int
1.1 djm 137: get_status(int fd, int expected_id)
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)
148: fatal("ID mismatch (%d != %d)", id, expected_id);
149: if (type != SSH2_FXP_STATUS)
150: fatal("Expected SSH2_FXP_STATUS(%d) packet, got %d",
151: SSH2_FXP_STATUS, type);
152:
153: status = buffer_get_int(&msg);
154: buffer_free(&msg);
155:
156: debug3("SSH2_FXP_STATUS %d", status);
157:
158: return(status);
159: }
160:
1.16.2.1 jason 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)
174: fatal("ID mismatch (%d != %d)", id, expected_id);
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)
181: fatal("Expected SSH2_FXP_HANDLE(%d) packet, got %d",
182: SSH2_FXP_HANDLE, type);
183:
184: handle = buffer_get_string(&msg, len);
185: buffer_free(&msg);
186:
187: return(handle);
188: }
189:
1.16.2.1 jason 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:
203: debug3("Received stat reply T:%d I:%d", type, id);
204: if (id != expected_id)
205: fatal("ID mismatch (%d != %d)", id, expected_id);
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) {
215: fatal("Expected SSH2_FXP_ATTRS(%d) packet, got %d",
216: SSH2_FXP_ATTRS, type);
217: }
218: a = decode_attrib(&msg);
219: buffer_free(&msg);
220:
221: return(a);
222: }
223:
1.16.2.2 miod 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: {
227: int type, version;
228: Buffer msg;
1.16.2.2 miod 229: struct sftp_conn *ret;
1.1 djm 230:
231: buffer_init(&msg);
232: buffer_put_char(&msg, SSH2_FXP_INIT);
233: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
234: send_msg(fd_out, &msg);
235:
236: buffer_clear(&msg);
237:
238: get_msg(fd_in, &msg);
239:
1.3 stevesk 240: /* Expecting a VERSION reply */
1.1 djm 241: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
242: error("Invalid packet back from SSH2_FXP_INIT (type %d)",
243: type);
244: buffer_free(&msg);
1.16.2.2 miod 245: return(NULL);
1.1 djm 246: }
247: version = buffer_get_int(&msg);
248:
249: debug2("Remote version: %d", version);
250:
251: /* Check for extensions */
252: while (buffer_len(&msg) > 0) {
253: char *name = buffer_get_string(&msg, NULL);
254: char *value = buffer_get_string(&msg, NULL);
255:
256: debug2("Init extension: \"%s\"", name);
257: xfree(name);
258: xfree(value);
259: }
260:
261: buffer_free(&msg);
1.11 djm 262:
1.16.2.2 miod 263: ret = xmalloc(sizeof(*ret));
264: ret->fd_in = fd_in;
265: ret->fd_out = fd_out;
266: ret->transfer_buflen = transfer_buflen;
267: ret->num_requests = num_requests;
268: ret->version = version;
269: ret->msg_id = 1;
270:
271: /* Some filexfer v.0 servers don't support large packets */
272: if (version == 0)
1.16.2.3! miod 273: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.16.2.2 miod 274:
275: return(ret);
276: }
277:
278: u_int
279: sftp_proto_version(struct sftp_conn *conn)
280: {
281: return(conn->version);
1.1 djm 282: }
283:
284: int
1.16.2.2 miod 285: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 286: {
287: u_int id, status;
288: Buffer msg;
289:
290: buffer_init(&msg);
291:
1.16.2.2 miod 292: id = conn->msg_id++;
1.1 djm 293: buffer_put_char(&msg, SSH2_FXP_CLOSE);
294: buffer_put_int(&msg, id);
295: buffer_put_string(&msg, handle, handle_len);
1.16.2.2 miod 296: send_msg(conn->fd_out, &msg);
1.1 djm 297: debug3("Sent message SSH2_FXP_CLOSE I:%d", id);
298:
1.16.2.2 miod 299: status = get_status(conn->fd_in, id);
1.1 djm 300: if (status != SSH2_FX_OK)
301: error("Couldn't close file: %s", fx2txt(status));
302:
303: buffer_free(&msg);
304:
305: return(status);
306: }
307:
1.12 djm 308:
1.16.2.1 jason 309: static int
1.16.2.2 miod 310: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 311: SFTP_DIRENT ***dir)
1.1 djm 312: {
313: Buffer msg;
1.13 markus 314: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 315: char *handle;
316:
1.16.2.2 miod 317: id = conn->msg_id++;
1.1 djm 318:
319: buffer_init(&msg);
320: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
321: buffer_put_int(&msg, id);
322: buffer_put_cstring(&msg, path);
1.16.2.2 miod 323: send_msg(conn->fd_out, &msg);
1.1 djm 324:
325: buffer_clear(&msg);
326:
1.16.2.2 miod 327: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 328: if (handle == NULL)
329: return(-1);
330:
1.12 djm 331: if (dir) {
332: ents = 0;
333: *dir = xmalloc(sizeof(**dir));
334: (*dir)[0] = NULL;
335: }
336:
1.16.2.2 miod 337: for (;;) {
1.1 djm 338: int count;
339:
1.16.2.2 miod 340: id = expected_id = conn->msg_id++;
1.1 djm 341:
342: debug3("Sending SSH2_FXP_READDIR I:%d", id);
343:
344: buffer_clear(&msg);
345: buffer_put_char(&msg, SSH2_FXP_READDIR);
346: buffer_put_int(&msg, id);
347: buffer_put_string(&msg, handle, handle_len);
1.16.2.2 miod 348: send_msg(conn->fd_out, &msg);
1.1 djm 349:
350: buffer_clear(&msg);
351:
1.16.2.2 miod 352: get_msg(conn->fd_in, &msg);
1.1 djm 353:
354: type = buffer_get_char(&msg);
355: id = buffer_get_int(&msg);
356:
357: debug3("Received reply T:%d I:%d", type, id);
358:
359: if (id != expected_id)
360: fatal("ID mismatch (%d != %d)", id, expected_id);
361:
362: if (type == SSH2_FXP_STATUS) {
363: int status = buffer_get_int(&msg);
364:
365: debug3("Received SSH2_FXP_STATUS %d", status);
366:
367: if (status == SSH2_FX_EOF) {
368: break;
369: } else {
370: error("Couldn't read directory: %s",
371: fx2txt(status));
1.16.2.2 miod 372: do_close(conn, handle, handle_len);
1.9 djm 373: return(status);
1.1 djm 374: }
375: } else if (type != SSH2_FXP_NAME)
376: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
377: SSH2_FXP_NAME, type);
378:
379: count = buffer_get_int(&msg);
1.7 markus 380: if (count == 0)
381: break;
1.8 stevesk 382: debug3("Received %d SSH2_FXP_NAME responses", count);
1.16.2.2 miod 383: for (i = 0; i < count; i++) {
1.1 djm 384: char *filename, *longname;
385: Attrib *a;
386:
387: filename = buffer_get_string(&msg, NULL);
388: longname = buffer_get_string(&msg, NULL);
389: a = decode_attrib(&msg);
390:
1.12 djm 391: if (printflag)
392: printf("%s\n", longname);
393:
394: if (dir) {
1.16 markus 395: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 396: (ents + 2));
397: (*dir)[ents] = xmalloc(sizeof(***dir));
398: (*dir)[ents]->filename = xstrdup(filename);
399: (*dir)[ents]->longname = xstrdup(longname);
400: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
401: (*dir)[++ents] = NULL;
402: }
1.1 djm 403:
404: xfree(filename);
405: xfree(longname);
406: }
407: }
408:
409: buffer_free(&msg);
1.16.2.2 miod 410: do_close(conn, handle, handle_len);
1.1 djm 411: xfree(handle);
412:
413: return(0);
414: }
415:
416: int
1.16.2.2 miod 417: do_ls(struct sftp_conn *conn, char *path)
1.12 djm 418: {
1.16.2.2 miod 419: return(do_lsreaddir(conn, path, 1, NULL));
1.12 djm 420: }
421:
422: int
1.16.2.2 miod 423: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 424: {
1.16.2.2 miod 425: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 426: }
427:
428: void free_sftp_dirents(SFTP_DIRENT **s)
429: {
430: int i;
1.16.2.2 miod 431:
432: for (i = 0; s[i]; i++) {
1.12 djm 433: xfree(s[i]->filename);
434: xfree(s[i]->longname);
435: xfree(s[i]);
436: }
437: xfree(s);
438: }
439:
440: int
1.16.2.2 miod 441: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 442: {
443: u_int status, id;
444:
445: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
446:
1.16.2.2 miod 447: id = conn->msg_id++;
1.16.2.3! miod 448: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.16.2.2 miod 449: strlen(path));
450: status = get_status(conn->fd_in, id);
1.1 djm 451: if (status != SSH2_FX_OK)
452: error("Couldn't delete file: %s", fx2txt(status));
453: return(status);
454: }
455:
456: int
1.16.2.2 miod 457: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 458: {
459: u_int status, id;
460:
1.16.2.2 miod 461: id = conn->msg_id++;
462: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 463: strlen(path), a);
464:
1.16.2.2 miod 465: status = get_status(conn->fd_in, id);
1.1 djm 466: if (status != SSH2_FX_OK)
467: error("Couldn't create directory: %s", fx2txt(status));
468:
469: return(status);
470: }
471:
472: int
1.16.2.2 miod 473: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 474: {
475: u_int status, id;
476:
1.16.2.2 miod 477: id = conn->msg_id++;
478: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
479: strlen(path));
1.1 djm 480:
1.16.2.2 miod 481: status = get_status(conn->fd_in, id);
1.1 djm 482: if (status != SSH2_FX_OK)
483: error("Couldn't remove directory: %s", fx2txt(status));
484:
485: return(status);
486: }
487:
488: Attrib *
1.16.2.2 miod 489: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 490: {
491: u_int id;
492:
1.16.2.2 miod 493: id = conn->msg_id++;
494:
1.16.2.3! miod 495: send_string_request(conn->fd_out, id,
! 496: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.16.2.2 miod 497: path, strlen(path));
498:
499: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 500: }
501:
502: Attrib *
1.16.2.2 miod 503: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 504: {
505: u_int id;
506:
1.16.2.2 miod 507: if (conn->version == 0) {
508: if (quiet)
509: debug("Server version does not support lstat operation");
510: else
1.16.2.3! miod 511: log("Server version does not support lstat operation");
! 512: return(do_stat(conn, path, quiet));
1.16.2.2 miod 513: }
514:
515: id = conn->msg_id++;
516: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
517: strlen(path));
518:
519: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 520: }
521:
522: Attrib *
1.16.2.2 miod 523: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 524: {
525: u_int id;
526:
1.16.2.2 miod 527: id = conn->msg_id++;
528: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
529: handle_len);
530:
531: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 532: }
533:
534: int
1.16.2.2 miod 535: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 536: {
537: u_int status, id;
538:
1.16.2.2 miod 539: id = conn->msg_id++;
540: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 541: strlen(path), a);
542:
1.16.2.2 miod 543: status = get_status(conn->fd_in, id);
1.1 djm 544: if (status != SSH2_FX_OK)
545: error("Couldn't setstat on \"%s\": %s", path,
546: fx2txt(status));
547:
548: return(status);
549: }
550:
551: int
1.16.2.2 miod 552: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 553: Attrib *a)
554: {
555: u_int status, id;
556:
1.16.2.2 miod 557: id = conn->msg_id++;
558: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 559: handle_len, a);
560:
1.16.2.2 miod 561: status = get_status(conn->fd_in, id);
1.1 djm 562: if (status != SSH2_FX_OK)
563: error("Couldn't fsetstat: %s", fx2txt(status));
564:
565: return(status);
566: }
567:
568: char *
1.16.2.2 miod 569: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 570: {
571: Buffer msg;
572: u_int type, expected_id, count, id;
573: char *filename, *longname;
574: Attrib *a;
575:
1.16.2.2 miod 576: expected_id = id = conn->msg_id++;
577: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
578: strlen(path));
1.1 djm 579:
580: buffer_init(&msg);
581:
1.16.2.2 miod 582: get_msg(conn->fd_in, &msg);
1.1 djm 583: type = buffer_get_char(&msg);
584: id = buffer_get_int(&msg);
585:
586: if (id != expected_id)
587: fatal("ID mismatch (%d != %d)", id, expected_id);
588:
589: if (type == SSH2_FXP_STATUS) {
590: u_int status = buffer_get_int(&msg);
591:
592: error("Couldn't canonicalise: %s", fx2txt(status));
593: return(NULL);
594: } else if (type != SSH2_FXP_NAME)
595: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
596: SSH2_FXP_NAME, type);
597:
598: count = buffer_get_int(&msg);
599: if (count != 1)
600: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
601:
602: filename = buffer_get_string(&msg, NULL);
603: longname = buffer_get_string(&msg, NULL);
604: a = decode_attrib(&msg);
605:
606: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
607:
608: xfree(longname);
609:
610: buffer_free(&msg);
611:
612: return(filename);
613: }
614:
615: int
1.16.2.2 miod 616: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 617: {
618: Buffer msg;
619: u_int status, id;
620:
621: buffer_init(&msg);
622:
623: /* Send rename request */
1.16.2.2 miod 624: id = conn->msg_id++;
1.1 djm 625: buffer_put_char(&msg, SSH2_FXP_RENAME);
626: buffer_put_int(&msg, id);
627: buffer_put_cstring(&msg, oldpath);
628: buffer_put_cstring(&msg, newpath);
1.16.2.2 miod 629: send_msg(conn->fd_out, &msg);
1.1 djm 630: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
631: newpath);
632: buffer_free(&msg);
633:
1.16.2.2 miod 634: status = get_status(conn->fd_in, id);
1.1 djm 635: if (status != SSH2_FX_OK)
1.16.2.2 miod 636: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
637: newpath, fx2txt(status));
1.1 djm 638:
639: return(status);
1.11 djm 640: }
641:
642: int
1.16.2.2 miod 643: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 644: {
645: Buffer msg;
646: u_int status, id;
647:
1.16.2.2 miod 648: if (conn->version < 3) {
649: error("This server does not support the symlink operation");
650: return(SSH2_FX_OP_UNSUPPORTED);
651: }
652:
1.11 djm 653: buffer_init(&msg);
654:
655: /* Send rename request */
1.16.2.2 miod 656: id = conn->msg_id++;
1.11 djm 657: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
658: buffer_put_int(&msg, id);
659: buffer_put_cstring(&msg, oldpath);
660: buffer_put_cstring(&msg, newpath);
1.16.2.2 miod 661: send_msg(conn->fd_out, &msg);
1.11 djm 662: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
663: newpath);
664: buffer_free(&msg);
665:
1.16.2.2 miod 666: status = get_status(conn->fd_in, id);
1.11 djm 667: if (status != SSH2_FX_OK)
1.16.2.2 miod 668: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
669: newpath, fx2txt(status));
1.11 djm 670:
671: return(status);
672: }
673:
674: char *
1.16.2.2 miod 675: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 676: {
677: Buffer msg;
678: u_int type, expected_id, count, id;
679: char *filename, *longname;
680: Attrib *a;
681:
1.16.2.2 miod 682: expected_id = id = conn->msg_id++;
683: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
684: strlen(path));
1.11 djm 685:
686: buffer_init(&msg);
687:
1.16.2.2 miod 688: get_msg(conn->fd_in, &msg);
1.11 djm 689: type = buffer_get_char(&msg);
690: id = buffer_get_int(&msg);
691:
692: if (id != expected_id)
693: fatal("ID mismatch (%d != %d)", id, expected_id);
694:
695: if (type == SSH2_FXP_STATUS) {
696: u_int status = buffer_get_int(&msg);
697:
698: error("Couldn't readlink: %s", fx2txt(status));
699: return(NULL);
700: } else if (type != SSH2_FXP_NAME)
701: fatal("Expected SSH2_FXP_NAME(%d) packet, got %d",
702: SSH2_FXP_NAME, type);
703:
704: count = buffer_get_int(&msg);
705: if (count != 1)
706: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
707:
708: filename = buffer_get_string(&msg, NULL);
709: longname = buffer_get_string(&msg, NULL);
710: a = decode_attrib(&msg);
711:
712: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
713:
714: xfree(longname);
715:
716: buffer_free(&msg);
717:
718: return(filename);
1.1 djm 719: }
720:
1.16.2.2 miod 721: static void
722: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
723: char *handle, u_int handle_len)
724: {
725: Buffer msg;
1.16.2.3! miod 726:
1.16.2.2 miod 727: buffer_init(&msg);
728: buffer_clear(&msg);
729: buffer_put_char(&msg, SSH2_FXP_READ);
730: buffer_put_int(&msg, id);
731: buffer_put_string(&msg, handle, handle_len);
732: buffer_put_int64(&msg, offset);
733: buffer_put_int(&msg, len);
734: send_msg(fd_out, &msg);
735: buffer_free(&msg);
1.16.2.3! miod 736: }
1.16.2.2 miod 737:
1.1 djm 738: int
1.16.2.2 miod 739: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
1.1 djm 740: int pflag)
741: {
742: Attrib junk, *a;
1.16.2.2 miod 743: Buffer msg;
744: char *handle;
745: int local_fd, status, num_req, max_req, write_error;
746: int read_error, write_errno;
747: u_int64_t offset, size;
748: u_int handle_len, mode, type, id, buflen;
749: struct request {
750: u_int id;
751: u_int len;
752: u_int64_t offset;
1.16.2.3! miod 753: TAILQ_ENTRY(request) tq;
1.16.2.2 miod 754: };
755: TAILQ_HEAD(reqhead, request) requests;
756: struct request *req;
1.1 djm 757:
1.16.2.2 miod 758: TAILQ_INIT(&requests);
759:
760: a = do_stat(conn, remote_path, 0);
1.1 djm 761: if (a == NULL)
762: return(-1);
763:
764: /* XXX: should we preserve set[ug]id? */
765: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
766: mode = S_IWRITE | (a->perm & 0777);
767: else
768: mode = 0666;
769:
1.14 djm 770: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
771: (a->perm & S_IFDIR)) {
772: error("Cannot download a directory: %s", remote_path);
773: return(-1);
774: }
775:
1.16.2.2 miod 776: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
777: size = a->size;
778: else
779: size = 0;
1.1 djm 780:
1.16.2.2 miod 781: buflen = conn->transfer_buflen;
1.1 djm 782: buffer_init(&msg);
783:
784: /* Send open request */
1.16.2.2 miod 785: id = conn->msg_id++;
1.1 djm 786: buffer_put_char(&msg, SSH2_FXP_OPEN);
787: buffer_put_int(&msg, id);
788: buffer_put_cstring(&msg, remote_path);
789: buffer_put_int(&msg, SSH2_FXF_READ);
790: attrib_clear(&junk); /* Send empty attributes */
791: encode_attrib(&msg, &junk);
1.16.2.2 miod 792: send_msg(conn->fd_out, &msg);
1.1 djm 793: debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path);
794:
1.16.2.2 miod 795: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 796: if (handle == NULL) {
797: buffer_free(&msg);
1.16.2.2 miod 798: return(-1);
799: }
800:
801: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
802: if (local_fd == -1) {
803: error("Couldn't open local file \"%s\" for writing: %s",
804: local_path, strerror(errno));
805: buffer_free(&msg);
806: xfree(handle);
1.1 djm 807: return(-1);
808: }
809:
810: /* Read from remote and write to local */
1.16.2.2 miod 811: write_error = read_error = write_errno = num_req = offset = 0;
812: max_req = 1;
813: while (num_req > 0 || max_req > 0) {
1.1 djm 814: char *data;
1.16.2.2 miod 815: u_int len;
1.1 djm 816:
1.16.2.2 miod 817: /* Send some more requests */
818: while (num_req < max_req) {
1.16.2.3! miod 819: debug3("Request range %llu -> %llu (%d/%d)",
! 820: (unsigned long long)offset,
! 821: (unsigned long long)offset + buflen - 1,
! 822: num_req, max_req);
1.16.2.2 miod 823: req = xmalloc(sizeof(*req));
824: req->id = conn->msg_id++;
825: req->len = buflen;
826: req->offset = offset;
827: offset += buflen;
828: num_req++;
829: TAILQ_INSERT_TAIL(&requests, req, tq);
1.16.2.3! miod 830: send_read_request(conn->fd_out, req->id, req->offset,
1.16.2.2 miod 831: req->len, handle, handle_len);
832: }
1.1 djm 833:
834: buffer_clear(&msg);
1.16.2.2 miod 835: get_msg(conn->fd_in, &msg);
1.1 djm 836: type = buffer_get_char(&msg);
837: id = buffer_get_int(&msg);
1.16.2.2 miod 838: debug3("Received reply T:%d I:%d R:%d", type, id, max_req);
839:
840: /* Find the request in our queue */
841: for(req = TAILQ_FIRST(&requests);
842: req != NULL && req->id != id;
843: req = TAILQ_NEXT(req, tq))
844: ;
845: if (req == NULL)
846: fatal("Unexpected reply %u", id);
847:
848: switch (type) {
849: case SSH2_FXP_STATUS:
1.5 djm 850: status = buffer_get_int(&msg);
1.16.2.2 miod 851: if (status != SSH2_FX_EOF)
852: read_error = 1;
853: max_req = 0;
854: TAILQ_REMOVE(&requests, req, tq);
855: xfree(req);
856: num_req--;
857: break;
858: case SSH2_FXP_DATA:
859: data = buffer_get_string(&msg, &len);
1.16.2.3! miod 860: debug3("Received data %llu -> %llu",
! 861: (unsigned long long)req->offset,
! 862: (unsigned long long)req->offset + len - 1);
1.16.2.2 miod 863: if (len > req->len)
864: fatal("Received more data than asked for "
865: "%d > %d", len, req->len);
866: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
867: atomicio(write, local_fd, data, len) != len) &&
868: !write_error) {
869: write_errno = errno;
870: write_error = 1;
871: max_req = 0;
872: }
873: xfree(data);
1.1 djm 874:
1.16.2.2 miod 875: if (len == req->len) {
876: TAILQ_REMOVE(&requests, req, tq);
877: xfree(req);
878: num_req--;
879: } else {
880: /* Resend the request for the missing data */
881: debug3("Short data block, re-requesting "
1.16.2.3! miod 882: "%llu -> %llu (%2d)",
! 883: (unsigned long long)req->offset + len,
! 884: (unsigned long long)req->offset +
! 885: req->len - 1, num_req);
1.16.2.2 miod 886: req->id = conn->msg_id++;
887: req->len -= len;
888: req->offset += len;
1.16.2.3! miod 889: send_read_request(conn->fd_out, req->id,
1.16.2.2 miod 890: req->offset, req->len, handle, handle_len);
891: /* Reduce the request size */
892: if (len < buflen)
893: buflen = MAX(MIN_READ_SIZE, len);
1.1 djm 894: }
1.16.2.2 miod 895: if (max_req > 0) { /* max_req = 0 iff EOF received */
896: if (size > 0 && offset > size) {
897: /* Only one request at a time
898: * after the expected EOF */
899: debug3("Finish at %llu (%2d)",
1.16.2.3! miod 900: (unsigned long long)offset,
! 901: num_req);
1.16.2.2 miod 902: max_req = 1;
903: }
904: else if (max_req < conn->num_requests + 1) {
905: ++max_req;
906: }
907: }
908: break;
909: default:
1.1 djm 910: fatal("Expected SSH2_FXP_DATA(%d) packet, got %d",
911: SSH2_FXP_DATA, type);
912: }
913: }
1.5 djm 914:
1.16.2.2 miod 915: /* Sanity check */
916: if (TAILQ_FIRST(&requests) != NULL)
917: fatal("Transfer complete, but requests still in queue");
918:
919: if (read_error) {
1.16.2.3! miod 920: error("Couldn't read from remote file \"%s\" : %s",
1.16.2.2 miod 921: remote_path, fx2txt(status));
922: do_close(conn, handle, handle_len);
923: } else if (write_error) {
924: error("Couldn't write to \"%s\": %s", local_path,
925: strerror(write_errno));
926: status = -1;
927: do_close(conn, handle, handle_len);
928: } else {
929: status = do_close(conn, handle, handle_len);
930:
931: /* Override umask and utimes if asked */
932: if (pflag && fchmod(local_fd, mode) == -1)
933: error("Couldn't set mode on \"%s\": %s", local_path,
934: strerror(errno));
935: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
936: struct timeval tv[2];
937: tv[0].tv_sec = a->atime;
938: tv[1].tv_sec = a->mtime;
939: tv[0].tv_usec = tv[1].tv_usec = 0;
940: if (utimes(local_path, tv) == -1)
941: error("Can't set times on \"%s\": %s",
942: local_path, strerror(errno));
943: }
1.10 djm 944: }
1.5 djm 945: close(local_fd);
946: buffer_free(&msg);
1.1 djm 947: xfree(handle);
1.16.2.2 miod 948:
949: return(status);
1.1 djm 950: }
951:
952: int
1.16.2.2 miod 953: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
1.1 djm 954: int pflag)
955: {
1.16.2.2 miod 956: int local_fd, status;
957: u_int handle_len, id, type;
1.1 djm 958: u_int64_t offset;
1.16.2.2 miod 959: char *handle, *data;
1.1 djm 960: Buffer msg;
961: struct stat sb;
962: Attrib a;
1.16.2.2 miod 963: u_int32_t startid;
964: u_int32_t ackid;
965: struct outstanding_ack {
966: u_int id;
967: u_int len;
968: u_int64_t offset;
1.16.2.3! miod 969: TAILQ_ENTRY(outstanding_ack) tq;
1.16.2.2 miod 970: };
971: TAILQ_HEAD(ackhead, outstanding_ack) acks;
972: struct outstanding_ack *ack;
973:
974: TAILQ_INIT(&acks);
1.1 djm 975:
976: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
977: error("Couldn't open local file \"%s\" for reading: %s",
978: local_path, strerror(errno));
979: return(-1);
980: }
981: if (fstat(local_fd, &sb) == -1) {
982: error("Couldn't fstat local file \"%s\": %s",
983: local_path, strerror(errno));
984: close(local_fd);
985: return(-1);
986: }
987: stat_to_attrib(&sb, &a);
988:
989: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
990: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
991: a.perm &= 0777;
992: if (!pflag)
993: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
994:
995: buffer_init(&msg);
996:
997: /* Send open request */
1.16.2.2 miod 998: id = conn->msg_id++;
1.1 djm 999: buffer_put_char(&msg, SSH2_FXP_OPEN);
1000: buffer_put_int(&msg, id);
1001: buffer_put_cstring(&msg, remote_path);
1002: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1003: encode_attrib(&msg, &a);
1.16.2.2 miod 1004: send_msg(conn->fd_out, &msg);
1.1 djm 1005: debug3("Sent message SSH2_FXP_OPEN I:%d P:%s", id, remote_path);
1006:
1007: buffer_clear(&msg);
1008:
1.16.2.2 miod 1009: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1010: if (handle == NULL) {
1011: close(local_fd);
1012: buffer_free(&msg);
1013: return(-1);
1014: }
1015:
1.16.2.2 miod 1016: startid = ackid = id + 1;
1017: data = xmalloc(conn->transfer_buflen);
1018:
1.1 djm 1019: /* Read from local and write to remote */
1020: offset = 0;
1.16.2.2 miod 1021: for (;;) {
1.1 djm 1022: int len;
1023:
1024: /*
1025: * Can't use atomicio here because it returns 0 on EOF, thus losing
1026: * the last block of the file
1027: */
1028: do
1.16.2.2 miod 1029: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1030: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1031:
1032: if (len == -1)
1033: fatal("Couldn't read from \"%s\": %s", local_path,
1034: strerror(errno));
1.16.2.2 miod 1035:
1036: if (len != 0) {
1037: ack = xmalloc(sizeof(*ack));
1038: ack->id = ++id;
1039: ack->offset = offset;
1040: ack->len = len;
1041: TAILQ_INSERT_TAIL(&acks, ack, tq);
1042:
1043: buffer_clear(&msg);
1044: buffer_put_char(&msg, SSH2_FXP_WRITE);
1045: buffer_put_int(&msg, ack->id);
1046: buffer_put_string(&msg, handle, handle_len);
1047: buffer_put_int64(&msg, offset);
1048: buffer_put_string(&msg, data, len);
1049: send_msg(conn->fd_out, &msg);
1050: debug3("Sent message SSH2_FXP_WRITE I:%d O:%llu S:%u",
1.16.2.3! miod 1051: id, (unsigned long long)offset, len);
1.16.2.2 miod 1052: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1053: break;
1054:
1.16.2.2 miod 1055: if (ack == NULL)
1056: fatal("Unexpected ACK %u", id);
1057:
1.16.2.3! miod 1058: if (id == startid || len == 0 ||
1.16.2.2 miod 1059: id - ackid >= conn->num_requests) {
1.16.2.3! miod 1060: u_int r_id;
! 1061:
1.16.2.2 miod 1062: buffer_clear(&msg);
1063: get_msg(conn->fd_in, &msg);
1064: type = buffer_get_char(&msg);
1.16.2.3! miod 1065: r_id = buffer_get_int(&msg);
1.16.2.2 miod 1066:
1067: if (type != SSH2_FXP_STATUS)
1068: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1069: "got %d", SSH2_FXP_STATUS, type);
1.1 djm 1070:
1.16.2.2 miod 1071: status = buffer_get_int(&msg);
1072: debug3("SSH2_FXP_STATUS %d", status);
1073:
1074: /* Find the request in our queue */
1075: for(ack = TAILQ_FIRST(&acks);
1.16.2.3! miod 1076: ack != NULL && ack->id != r_id;
1.16.2.2 miod 1077: ack = TAILQ_NEXT(ack, tq))
1078: ;
1079: if (ack == NULL)
1.16.2.3! miod 1080: fatal("Can't find request for ID %d", r_id);
1.16.2.2 miod 1081: TAILQ_REMOVE(&acks, ack, tq);
1082:
1083: if (status != SSH2_FX_OK) {
1084: error("Couldn't write to remote file \"%s\": %s",
1085: remote_path, fx2txt(status));
1086: do_close(conn, handle, handle_len);
1087: close(local_fd);
1088: goto done;
1089: }
1.16.2.3! miod 1090: debug3("In write loop, ack for %u %d bytes at %llu",
! 1091: ack->id, ack->len, (unsigned long long)ack->offset);
1.16.2.2 miod 1092: ++ackid;
1093: free(ack);
1094: }
1.1 djm 1095: offset += len;
1096: }
1.16.2.2 miod 1097: xfree(data);
1.1 djm 1098:
1099: if (close(local_fd) == -1) {
1100: error("Couldn't close local file \"%s\": %s", local_path,
1101: strerror(errno));
1.16.2.2 miod 1102: do_close(conn, handle, handle_len);
1.5 djm 1103: status = -1;
1104: goto done;
1.1 djm 1105: }
1106:
1.10 djm 1107: /* Override umask and utimes if asked */
1108: if (pflag)
1.16.2.2 miod 1109: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1110:
1.16.2.2 miod 1111: status = do_close(conn, handle, handle_len);
1.5 djm 1112:
1113: done:
1114: xfree(handle);
1115: buffer_free(&msg);
1.16.2.2 miod 1116: return(status);
1.1 djm 1117: }
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