Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.39
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"
1.38 djm 31: RCSID("$OpenBSD: sftp-client.c,v 1.37 2002/11/21 23:03:51 deraadt 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"
1.39 ! fgsch 41: #include "progressmeter.h"
1.1 djm 42:
43: #include "sftp.h"
44: #include "sftp-common.h"
45: #include "sftp-client.h"
46:
1.39 ! fgsch 47: extern int showprogress;
! 48:
1.21 djm 49: /* Minimum amount of data to read at at time */
50: #define MIN_READ_SIZE 512
51:
1.23 djm 52: struct sftp_conn {
53: int fd_in;
54: int fd_out;
55: u_int transfer_buflen;
56: u_int num_requests;
57: u_int version;
58: u_int msg_id;
59: };
1.4 djm 60:
1.17 itojun 61: static void
1.1 djm 62: send_msg(int fd, Buffer *m)
63: {
64: int mlen = buffer_len(m);
65: int len;
66: Buffer oqueue;
67:
68: buffer_init(&oqueue);
69: buffer_put_int(&oqueue, mlen);
70: buffer_append(&oqueue, buffer_ptr(m), mlen);
71: buffer_consume(m, mlen);
72:
73: len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue));
74: if (len <= 0)
75: fatal("Couldn't send packet: %s", strerror(errno));
76:
77: buffer_free(&oqueue);
78: }
79:
1.17 itojun 80: static void
1.1 djm 81: get_msg(int fd, Buffer *m)
82: {
83: u_int len, msg_len;
84: unsigned char buf[4096];
85:
86: len = atomicio(read, fd, buf, 4);
1.15 djm 87: if (len == 0)
88: fatal("Connection closed");
89: else if (len == -1)
1.1 djm 90: fatal("Couldn't read packet: %s", strerror(errno));
91:
92: msg_len = GET_32BIT(buf);
93: if (msg_len > 256 * 1024)
1.33 deraadt 94: fatal("Received message too long %u", msg_len);
1.1 djm 95:
96: while (msg_len) {
97: len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf)));
1.15 djm 98: if (len == 0)
99: fatal("Connection closed");
100: else if (len == -1)
1.1 djm 101: fatal("Couldn't read packet: %s", strerror(errno));
102:
103: msg_len -= len;
104: buffer_append(m, buf, len);
105: }
106: }
107:
1.17 itojun 108: static void
1.1 djm 109: send_string_request(int fd, u_int id, u_int code, char *s,
110: u_int len)
111: {
112: Buffer msg;
113:
114: buffer_init(&msg);
115: buffer_put_char(&msg, code);
116: buffer_put_int(&msg, id);
117: buffer_put_string(&msg, s, len);
118: send_msg(fd, &msg);
1.33 deraadt 119: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 120: buffer_free(&msg);
121: }
122:
1.17 itojun 123: static void
1.1 djm 124: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
125: u_int len, Attrib *a)
126: {
127: Buffer msg;
128:
129: buffer_init(&msg);
130: buffer_put_char(&msg, code);
131: buffer_put_int(&msg, id);
132: buffer_put_string(&msg, s, len);
133: encode_attrib(&msg, a);
134: send_msg(fd, &msg);
1.33 deraadt 135: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 136: buffer_free(&msg);
137: }
138:
1.17 itojun 139: static u_int
1.33 deraadt 140: get_status(int fd, u_int expected_id)
1.1 djm 141: {
142: Buffer msg;
143: u_int type, id, status;
144:
145: buffer_init(&msg);
146: get_msg(fd, &msg);
147: type = buffer_get_char(&msg);
148: id = buffer_get_int(&msg);
149:
150: if (id != expected_id)
1.33 deraadt 151: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 152: if (type != SSH2_FXP_STATUS)
1.33 deraadt 153: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 154: SSH2_FXP_STATUS, type);
155:
156: status = buffer_get_int(&msg);
157: buffer_free(&msg);
158:
1.33 deraadt 159: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 160:
161: return(status);
162: }
163:
1.17 itojun 164: static char *
1.1 djm 165: get_handle(int fd, u_int expected_id, u_int *len)
166: {
167: Buffer msg;
168: u_int type, id;
169: char *handle;
170:
171: buffer_init(&msg);
172: get_msg(fd, &msg);
173: type = buffer_get_char(&msg);
174: id = buffer_get_int(&msg);
175:
176: if (id != expected_id)
1.33 deraadt 177: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 178: if (type == SSH2_FXP_STATUS) {
179: int status = buffer_get_int(&msg);
180:
181: error("Couldn't get handle: %s", fx2txt(status));
182: return(NULL);
183: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 184: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 185: SSH2_FXP_HANDLE, type);
186:
187: handle = buffer_get_string(&msg, len);
188: buffer_free(&msg);
189:
190: return(handle);
191: }
192:
1.17 itojun 193: static Attrib *
1.14 djm 194: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 195: {
196: Buffer msg;
197: u_int type, id;
198: Attrib *a;
199:
200: buffer_init(&msg);
201: get_msg(fd, &msg);
202:
203: type = buffer_get_char(&msg);
204: id = buffer_get_int(&msg);
205:
1.33 deraadt 206: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 207: if (id != expected_id)
1.33 deraadt 208: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 209: if (type == SSH2_FXP_STATUS) {
210: int status = buffer_get_int(&msg);
211:
1.14 djm 212: if (quiet)
213: debug("Couldn't stat remote file: %s", fx2txt(status));
214: else
215: error("Couldn't stat remote file: %s", fx2txt(status));
1.1 djm 216: return(NULL);
217: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 218: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 219: SSH2_FXP_ATTRS, type);
220: }
221: a = decode_attrib(&msg);
222: buffer_free(&msg);
223:
224: return(a);
225: }
226:
1.23 djm 227: struct sftp_conn *
228: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 229: {
1.33 deraadt 230: u_int type;
231: int version;
1.1 djm 232: Buffer msg;
1.23 djm 233: struct sftp_conn *ret;
1.1 djm 234:
235: buffer_init(&msg);
236: buffer_put_char(&msg, SSH2_FXP_INIT);
237: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
238: send_msg(fd_out, &msg);
239:
240: buffer_clear(&msg);
241:
242: get_msg(fd_in, &msg);
243:
1.3 stevesk 244: /* Expecting a VERSION reply */
1.1 djm 245: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 246: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 247: type);
248: buffer_free(&msg);
1.23 djm 249: return(NULL);
1.1 djm 250: }
251: version = buffer_get_int(&msg);
252:
253: debug2("Remote version: %d", version);
254:
255: /* Check for extensions */
256: while (buffer_len(&msg) > 0) {
257: char *name = buffer_get_string(&msg, NULL);
258: char *value = buffer_get_string(&msg, NULL);
259:
260: debug2("Init extension: \"%s\"", name);
261: xfree(name);
262: xfree(value);
263: }
264:
265: buffer_free(&msg);
1.11 djm 266:
1.23 djm 267: ret = xmalloc(sizeof(*ret));
268: ret->fd_in = fd_in;
269: ret->fd_out = fd_out;
270: ret->transfer_buflen = transfer_buflen;
271: ret->num_requests = num_requests;
272: ret->version = version;
273: ret->msg_id = 1;
274:
275: /* Some filexfer v.0 servers don't support large packets */
276: if (version == 0)
1.29 markus 277: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 278:
279: return(ret);
280: }
281:
282: u_int
283: sftp_proto_version(struct sftp_conn *conn)
284: {
285: return(conn->version);
1.1 djm 286: }
287:
288: int
1.23 djm 289: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 290: {
291: u_int id, status;
292: Buffer msg;
293:
294: buffer_init(&msg);
295:
1.23 djm 296: id = conn->msg_id++;
1.1 djm 297: buffer_put_char(&msg, SSH2_FXP_CLOSE);
298: buffer_put_int(&msg, id);
299: buffer_put_string(&msg, handle, handle_len);
1.23 djm 300: send_msg(conn->fd_out, &msg);
1.33 deraadt 301: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 302:
1.23 djm 303: status = get_status(conn->fd_in, id);
1.1 djm 304: if (status != SSH2_FX_OK)
305: error("Couldn't close file: %s", fx2txt(status));
306:
307: buffer_free(&msg);
308:
309: return(status);
310: }
311:
1.12 djm 312:
1.17 itojun 313: static int
1.23 djm 314: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 315: SFTP_DIRENT ***dir)
1.1 djm 316: {
317: Buffer msg;
1.13 markus 318: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 319: char *handle;
320:
1.23 djm 321: id = conn->msg_id++;
1.1 djm 322:
323: buffer_init(&msg);
324: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
325: buffer_put_int(&msg, id);
326: buffer_put_cstring(&msg, path);
1.23 djm 327: send_msg(conn->fd_out, &msg);
1.1 djm 328:
329: buffer_clear(&msg);
330:
1.23 djm 331: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 332: if (handle == NULL)
333: return(-1);
334:
1.12 djm 335: if (dir) {
336: ents = 0;
337: *dir = xmalloc(sizeof(**dir));
338: (*dir)[0] = NULL;
339: }
340:
1.19 deraadt 341: for (;;) {
1.1 djm 342: int count;
343:
1.23 djm 344: id = expected_id = conn->msg_id++;
1.1 djm 345:
1.33 deraadt 346: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 347:
348: buffer_clear(&msg);
349: buffer_put_char(&msg, SSH2_FXP_READDIR);
350: buffer_put_int(&msg, id);
351: buffer_put_string(&msg, handle, handle_len);
1.23 djm 352: send_msg(conn->fd_out, &msg);
1.1 djm 353:
354: buffer_clear(&msg);
355:
1.23 djm 356: get_msg(conn->fd_in, &msg);
1.1 djm 357:
358: type = buffer_get_char(&msg);
359: id = buffer_get_int(&msg);
360:
1.33 deraadt 361: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 362:
363: if (id != expected_id)
1.33 deraadt 364: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 365:
366: if (type == SSH2_FXP_STATUS) {
367: int status = buffer_get_int(&msg);
368:
369: debug3("Received SSH2_FXP_STATUS %d", status);
370:
371: if (status == SSH2_FX_EOF) {
372: break;
373: } else {
374: error("Couldn't read directory: %s",
375: fx2txt(status));
1.23 djm 376: do_close(conn, handle, handle_len);
1.9 djm 377: return(status);
1.1 djm 378: }
379: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 380: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 381: SSH2_FXP_NAME, type);
382:
383: count = buffer_get_int(&msg);
1.7 markus 384: if (count == 0)
385: break;
1.8 stevesk 386: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 387: for (i = 0; i < count; i++) {
1.1 djm 388: char *filename, *longname;
389: Attrib *a;
390:
391: filename = buffer_get_string(&msg, NULL);
392: longname = buffer_get_string(&msg, NULL);
393: a = decode_attrib(&msg);
394:
1.12 djm 395: if (printflag)
396: printf("%s\n", longname);
397:
398: if (dir) {
1.16 markus 399: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 400: (ents + 2));
401: (*dir)[ents] = xmalloc(sizeof(***dir));
402: (*dir)[ents]->filename = xstrdup(filename);
403: (*dir)[ents]->longname = xstrdup(longname);
404: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
405: (*dir)[++ents] = NULL;
406: }
1.1 djm 407:
408: xfree(filename);
409: xfree(longname);
410: }
411: }
412:
413: buffer_free(&msg);
1.23 djm 414: do_close(conn, handle, handle_len);
1.1 djm 415: xfree(handle);
416:
417: return(0);
1.12 djm 418: }
419:
420: int
1.23 djm 421: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 422: {
1.23 djm 423: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 424: }
425:
426: void free_sftp_dirents(SFTP_DIRENT **s)
427: {
428: int i;
1.19 deraadt 429:
430: for (i = 0; s[i]; i++) {
1.12 djm 431: xfree(s[i]->filename);
432: xfree(s[i]->longname);
433: xfree(s[i]);
434: }
435: xfree(s);
436: }
437:
438: int
1.23 djm 439: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 440: {
441: u_int status, id;
442:
443: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
444:
1.23 djm 445: id = conn->msg_id++;
1.28 markus 446: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 447: strlen(path));
448: status = get_status(conn->fd_in, id);
1.1 djm 449: if (status != SSH2_FX_OK)
450: error("Couldn't delete file: %s", fx2txt(status));
451: return(status);
452: }
453:
454: int
1.23 djm 455: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 456: {
457: u_int status, id;
458:
1.23 djm 459: id = conn->msg_id++;
460: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 461: strlen(path), a);
462:
1.23 djm 463: status = get_status(conn->fd_in, id);
1.1 djm 464: if (status != SSH2_FX_OK)
465: error("Couldn't create directory: %s", fx2txt(status));
466:
467: return(status);
468: }
469:
470: int
1.23 djm 471: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 472: {
473: u_int status, id;
474:
1.23 djm 475: id = conn->msg_id++;
476: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
477: strlen(path));
1.1 djm 478:
1.23 djm 479: status = get_status(conn->fd_in, id);
1.1 djm 480: if (status != SSH2_FX_OK)
481: error("Couldn't remove directory: %s", fx2txt(status));
482:
483: return(status);
484: }
485:
486: Attrib *
1.23 djm 487: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 488: {
489: u_int id;
490:
1.23 djm 491: id = conn->msg_id++;
492:
1.28 markus 493: send_string_request(conn->fd_out, id,
494: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 495: path, strlen(path));
496:
497: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 498: }
499:
500: Attrib *
1.23 djm 501: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 502: {
503: u_int id;
504:
1.23 djm 505: if (conn->version == 0) {
506: if (quiet)
507: debug("Server version does not support lstat operation");
508: else
1.30 markus 509: log("Server version does not support lstat operation");
510: return(do_stat(conn, path, quiet));
1.23 djm 511: }
512:
513: id = conn->msg_id++;
514: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
515: strlen(path));
516:
517: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 518: }
519:
520: Attrib *
1.23 djm 521: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 522: {
523: u_int id;
524:
1.23 djm 525: id = conn->msg_id++;
526: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
527: handle_len);
528:
529: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 530: }
531:
532: int
1.23 djm 533: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 534: {
535: u_int status, id;
536:
1.23 djm 537: id = conn->msg_id++;
538: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 539: strlen(path), a);
540:
1.23 djm 541: status = get_status(conn->fd_in, id);
1.1 djm 542: if (status != SSH2_FX_OK)
543: error("Couldn't setstat on \"%s\": %s", path,
544: fx2txt(status));
545:
546: return(status);
547: }
548:
549: int
1.23 djm 550: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 551: Attrib *a)
552: {
553: u_int status, id;
554:
1.23 djm 555: id = conn->msg_id++;
556: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 557: handle_len, a);
558:
1.23 djm 559: status = get_status(conn->fd_in, id);
1.1 djm 560: if (status != SSH2_FX_OK)
561: error("Couldn't fsetstat: %s", fx2txt(status));
562:
563: return(status);
564: }
565:
566: char *
1.23 djm 567: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 568: {
569: Buffer msg;
570: u_int type, expected_id, count, id;
571: char *filename, *longname;
572: Attrib *a;
573:
1.23 djm 574: expected_id = id = conn->msg_id++;
575: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
576: strlen(path));
1.1 djm 577:
578: buffer_init(&msg);
579:
1.23 djm 580: get_msg(conn->fd_in, &msg);
1.1 djm 581: type = buffer_get_char(&msg);
582: id = buffer_get_int(&msg);
583:
584: if (id != expected_id)
1.33 deraadt 585: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 586:
587: if (type == SSH2_FXP_STATUS) {
588: u_int status = buffer_get_int(&msg);
589:
590: error("Couldn't canonicalise: %s", fx2txt(status));
591: return(NULL);
592: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 593: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 594: SSH2_FXP_NAME, type);
595:
596: count = buffer_get_int(&msg);
597: if (count != 1)
598: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
599:
600: filename = buffer_get_string(&msg, NULL);
601: longname = buffer_get_string(&msg, NULL);
602: a = decode_attrib(&msg);
603:
604: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
605:
606: xfree(longname);
607:
608: buffer_free(&msg);
609:
610: return(filename);
611: }
612:
613: int
1.23 djm 614: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 615: {
616: Buffer msg;
617: u_int status, id;
618:
619: buffer_init(&msg);
620:
621: /* Send rename request */
1.23 djm 622: id = conn->msg_id++;
1.1 djm 623: buffer_put_char(&msg, SSH2_FXP_RENAME);
624: buffer_put_int(&msg, id);
625: buffer_put_cstring(&msg, oldpath);
626: buffer_put_cstring(&msg, newpath);
1.23 djm 627: send_msg(conn->fd_out, &msg);
1.1 djm 628: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
629: newpath);
630: buffer_free(&msg);
631:
1.23 djm 632: status = get_status(conn->fd_in, id);
1.1 djm 633: if (status != SSH2_FX_OK)
1.23 djm 634: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
635: newpath, fx2txt(status));
1.1 djm 636:
637: return(status);
1.11 djm 638: }
639:
640: int
1.23 djm 641: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 642: {
643: Buffer msg;
644: u_int status, id;
645:
1.23 djm 646: if (conn->version < 3) {
647: error("This server does not support the symlink operation");
648: return(SSH2_FX_OP_UNSUPPORTED);
649: }
650:
1.11 djm 651: buffer_init(&msg);
652:
653: /* Send rename request */
1.23 djm 654: id = conn->msg_id++;
1.11 djm 655: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
656: buffer_put_int(&msg, id);
657: buffer_put_cstring(&msg, oldpath);
658: buffer_put_cstring(&msg, newpath);
1.23 djm 659: send_msg(conn->fd_out, &msg);
1.11 djm 660: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
661: newpath);
662: buffer_free(&msg);
663:
1.23 djm 664: status = get_status(conn->fd_in, id);
1.11 djm 665: if (status != SSH2_FX_OK)
1.36 markus 666: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 667: newpath, fx2txt(status));
1.11 djm 668:
669: return(status);
670: }
671:
672: char *
1.23 djm 673: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 674: {
675: Buffer msg;
676: u_int type, expected_id, count, id;
677: char *filename, *longname;
678: Attrib *a;
679:
1.23 djm 680: expected_id = id = conn->msg_id++;
681: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
682: strlen(path));
1.11 djm 683:
684: buffer_init(&msg);
685:
1.23 djm 686: get_msg(conn->fd_in, &msg);
1.11 djm 687: type = buffer_get_char(&msg);
688: id = buffer_get_int(&msg);
689:
690: if (id != expected_id)
1.33 deraadt 691: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 692:
693: if (type == SSH2_FXP_STATUS) {
694: u_int status = buffer_get_int(&msg);
695:
696: error("Couldn't readlink: %s", fx2txt(status));
697: return(NULL);
698: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 699: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 700: SSH2_FXP_NAME, type);
701:
702: count = buffer_get_int(&msg);
703: if (count != 1)
704: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
705:
706: filename = buffer_get_string(&msg, NULL);
707: longname = buffer_get_string(&msg, NULL);
708: a = decode_attrib(&msg);
709:
710: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
711:
712: xfree(longname);
713:
714: buffer_free(&msg);
715:
716: return(filename);
1.1 djm 717: }
718:
1.21 djm 719: static void
720: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
721: char *handle, u_int handle_len)
722: {
723: Buffer msg;
1.28 markus 724:
1.21 djm 725: buffer_init(&msg);
726: buffer_clear(&msg);
727: buffer_put_char(&msg, SSH2_FXP_READ);
728: buffer_put_int(&msg, id);
729: buffer_put_string(&msg, handle, handle_len);
730: buffer_put_int64(&msg, offset);
731: buffer_put_int(&msg, len);
732: send_msg(fd_out, &msg);
733: buffer_free(&msg);
1.28 markus 734: }
1.21 djm 735:
1.1 djm 736: int
1.23 djm 737: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
738: int pflag)
1.1 djm 739: {
1.21 djm 740: Attrib junk, *a;
741: Buffer msg;
1.1 djm 742: char *handle;
1.21 djm 743: int local_fd, status, num_req, max_req, write_error;
744: int read_error, write_errno;
745: u_int64_t offset, size;
1.23 djm 746: u_int handle_len, mode, type, id, buflen;
1.39 ! fgsch 747: off_t progress_counter;
1.21 djm 748: struct request {
749: u_int id;
750: u_int len;
751: u_int64_t offset;
1.28 markus 752: TAILQ_ENTRY(request) tq;
1.21 djm 753: };
754: TAILQ_HEAD(reqhead, request) requests;
755: struct request *req;
756:
757: TAILQ_INIT(&requests);
1.1 djm 758:
1.23 djm 759: a = do_stat(conn, remote_path, 0);
1.1 djm 760: if (a == NULL)
761: return(-1);
762:
763: /* XXX: should we preserve set[ug]id? */
764: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 765: mode = a->perm & 0777;
1.1 djm 766: else
767: mode = 0666;
768:
1.14 djm 769: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
770: (a->perm & S_IFDIR)) {
771: error("Cannot download a directory: %s", remote_path);
772: return(-1);
773: }
774:
1.21 djm 775: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
776: size = a->size;
777: else
778: size = 0;
779:
1.23 djm 780: buflen = conn->transfer_buflen;
1.1 djm 781: buffer_init(&msg);
782:
783: /* Send open request */
1.23 djm 784: id = conn->msg_id++;
1.1 djm 785: buffer_put_char(&msg, SSH2_FXP_OPEN);
786: buffer_put_int(&msg, id);
787: buffer_put_cstring(&msg, remote_path);
788: buffer_put_int(&msg, SSH2_FXF_READ);
789: attrib_clear(&junk); /* Send empty attributes */
790: encode_attrib(&msg, &junk);
1.23 djm 791: send_msg(conn->fd_out, &msg);
1.33 deraadt 792: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 793:
1.23 djm 794: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 795: if (handle == NULL) {
796: buffer_free(&msg);
797: return(-1);
798: }
799:
1.38 djm 800: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
801: mode | S_IWRITE);
1.23 djm 802: if (local_fd == -1) {
803: error("Couldn't open local file \"%s\" for writing: %s",
804: local_path, strerror(errno));
1.24 markus 805: buffer_free(&msg);
806: xfree(handle);
1.23 djm 807: return(-1);
808: }
809:
1.1 djm 810: /* Read from remote and write to local */
1.21 djm 811: write_error = read_error = write_errno = num_req = offset = 0;
812: max_req = 1;
1.39 ! fgsch 813: progress_counter = 0;
! 814:
! 815: if (showprogress) {
! 816: if (size)
! 817: start_progress_meter(remote_path, size,
! 818: &progress_counter);
! 819: else
! 820: printf("Fetching %s to %s\n", remote_path, local_path);
! 821: }
! 822:
1.21 djm 823: while (num_req > 0 || max_req > 0) {
824: char *data;
1.1 djm 825: u_int len;
826:
1.21 djm 827: /* Send some more requests */
828: while (num_req < max_req) {
1.28 markus 829: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 830: (unsigned long long)offset,
831: (unsigned long long)offset + buflen - 1,
832: num_req, max_req);
1.21 djm 833: req = xmalloc(sizeof(*req));
1.23 djm 834: req->id = conn->msg_id++;
1.21 djm 835: req->len = buflen;
836: req->offset = offset;
837: offset += buflen;
838: num_req++;
839: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 840: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 841: req->len, handle, handle_len);
842: }
1.1 djm 843:
844: buffer_clear(&msg);
1.23 djm 845: get_msg(conn->fd_in, &msg);
1.1 djm 846: type = buffer_get_char(&msg);
847: id = buffer_get_int(&msg);
1.33 deraadt 848: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 849:
850: /* Find the request in our queue */
851: for(req = TAILQ_FIRST(&requests);
852: req != NULL && req->id != id;
853: req = TAILQ_NEXT(req, tq))
854: ;
855: if (req == NULL)
856: fatal("Unexpected reply %u", id);
857:
858: switch (type) {
859: case SSH2_FXP_STATUS:
1.5 djm 860: status = buffer_get_int(&msg);
1.21 djm 861: if (status != SSH2_FX_EOF)
862: read_error = 1;
863: max_req = 0;
864: TAILQ_REMOVE(&requests, req, tq);
865: xfree(req);
866: num_req--;
867: break;
868: case SSH2_FXP_DATA:
869: data = buffer_get_string(&msg, &len);
1.26 itojun 870: debug3("Received data %llu -> %llu",
1.28 markus 871: (unsigned long long)req->offset,
1.26 itojun 872: (unsigned long long)req->offset + len - 1);
1.21 djm 873: if (len > req->len)
874: fatal("Received more data than asked for "
1.37 deraadt 875: "%u > %u", len, req->len);
1.21 djm 876: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.37 deraadt 877: atomicio(write, local_fd, data, len) != len) &&
1.21 djm 878: !write_error) {
879: write_errno = errno;
880: write_error = 1;
881: max_req = 0;
882: }
1.39 ! fgsch 883: progress_counter += len;
1.21 djm 884: xfree(data);
1.1 djm 885:
1.21 djm 886: if (len == req->len) {
887: TAILQ_REMOVE(&requests, req, tq);
888: xfree(req);
889: num_req--;
890: } else {
891: /* Resend the request for the missing data */
892: debug3("Short data block, re-requesting "
1.26 itojun 893: "%llu -> %llu (%2d)",
1.28 markus 894: (unsigned long long)req->offset + len,
1.27 itojun 895: (unsigned long long)req->offset +
896: req->len - 1, num_req);
1.23 djm 897: req->id = conn->msg_id++;
1.21 djm 898: req->len -= len;
899: req->offset += len;
1.28 markus 900: send_read_request(conn->fd_out, req->id,
1.23 djm 901: req->offset, req->len, handle, handle_len);
1.21 djm 902: /* Reduce the request size */
903: if (len < buflen)
904: buflen = MAX(MIN_READ_SIZE, len);
905: }
906: if (max_req > 0) { /* max_req = 0 iff EOF received */
907: if (size > 0 && offset > size) {
908: /* Only one request at a time
909: * after the expected EOF */
910: debug3("Finish at %llu (%2d)",
1.26 itojun 911: (unsigned long long)offset,
912: num_req);
1.21 djm 913: max_req = 1;
914: }
1.23 djm 915: else if (max_req < conn->num_requests + 1) {
1.21 djm 916: ++max_req;
917: }
1.1 djm 918: }
1.21 djm 919: break;
920: default:
1.33 deraadt 921: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 922: SSH2_FXP_DATA, type);
923: }
1.21 djm 924: }
1.1 djm 925:
1.39 ! fgsch 926: if (showprogress && size)
! 927: stop_progress_meter();
! 928:
1.21 djm 929: /* Sanity check */
930: if (TAILQ_FIRST(&requests) != NULL)
931: fatal("Transfer complete, but requests still in queue");
932:
933: if (read_error) {
1.28 markus 934: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 935: remote_path, fx2txt(status));
1.23 djm 936: do_close(conn, handle, handle_len);
1.21 djm 937: } else if (write_error) {
938: error("Couldn't write to \"%s\": %s", local_path,
939: strerror(write_errno));
940: status = -1;
1.23 djm 941: do_close(conn, handle, handle_len);
1.21 djm 942: } else {
1.23 djm 943: status = do_close(conn, handle, handle_len);
1.21 djm 944:
945: /* Override umask and utimes if asked */
946: if (pflag && fchmod(local_fd, mode) == -1)
947: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 948: strerror(errno));
1.21 djm 949: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
950: struct timeval tv[2];
951: tv[0].tv_sec = a->atime;
952: tv[1].tv_sec = a->mtime;
953: tv[0].tv_usec = tv[1].tv_usec = 0;
954: if (utimes(local_path, tv) == -1)
955: error("Can't set times on \"%s\": %s",
1.37 deraadt 956: local_path, strerror(errno));
1.1 djm 957: }
1.10 djm 958: }
1.5 djm 959: close(local_fd);
960: buffer_free(&msg);
1.1 djm 961: xfree(handle);
1.23 djm 962:
963: return(status);
1.1 djm 964: }
965:
966: int
1.23 djm 967: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
968: int pflag)
1.1 djm 969: {
1.20 djm 970: int local_fd, status;
1.22 djm 971: u_int handle_len, id, type;
1.1 djm 972: u_int64_t offset;
1.20 djm 973: char *handle, *data;
1.1 djm 974: Buffer msg;
975: struct stat sb;
976: Attrib a;
1.21 djm 977: u_int32_t startid;
978: u_int32_t ackid;
1.22 djm 979: struct outstanding_ack {
980: u_int id;
981: u_int len;
982: u_int64_t offset;
1.28 markus 983: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 984: };
985: TAILQ_HEAD(ackhead, outstanding_ack) acks;
986: struct outstanding_ack *ack;
987:
988: TAILQ_INIT(&acks);
1.1 djm 989:
990: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
991: error("Couldn't open local file \"%s\" for reading: %s",
992: local_path, strerror(errno));
993: return(-1);
994: }
995: if (fstat(local_fd, &sb) == -1) {
996: error("Couldn't fstat local file \"%s\": %s",
997: local_path, strerror(errno));
998: close(local_fd);
999: return(-1);
1000: }
1001: stat_to_attrib(&sb, &a);
1002:
1003: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1004: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1005: a.perm &= 0777;
1006: if (!pflag)
1007: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1008:
1009: buffer_init(&msg);
1010:
1011: /* Send open request */
1.23 djm 1012: id = conn->msg_id++;
1.1 djm 1013: buffer_put_char(&msg, SSH2_FXP_OPEN);
1014: buffer_put_int(&msg, id);
1015: buffer_put_cstring(&msg, remote_path);
1016: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1017: encode_attrib(&msg, &a);
1.23 djm 1018: send_msg(conn->fd_out, &msg);
1.33 deraadt 1019: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1020:
1021: buffer_clear(&msg);
1022:
1.23 djm 1023: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1024: if (handle == NULL) {
1025: close(local_fd);
1026: buffer_free(&msg);
1027: return(-1);
1028: }
1029:
1.21 djm 1030: startid = ackid = id + 1;
1.23 djm 1031: data = xmalloc(conn->transfer_buflen);
1.20 djm 1032:
1.1 djm 1033: /* Read from local and write to remote */
1034: offset = 0;
1.39 ! fgsch 1035: if (showprogress)
! 1036: start_progress_meter(local_path, sb.st_size, &offset);
! 1037: else
! 1038: printf("Uploading %s to %s\n", local_path, remote_path);
! 1039:
1.19 deraadt 1040: for (;;) {
1.1 djm 1041: int len;
1042:
1043: /*
1044: * Can't use atomicio here because it returns 0 on EOF, thus losing
1045: * the last block of the file
1046: */
1047: do
1.23 djm 1048: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1049: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1050:
1051: if (len == -1)
1052: fatal("Couldn't read from \"%s\": %s", local_path,
1053: strerror(errno));
1.21 djm 1054:
1055: if (len != 0) {
1.22 djm 1056: ack = xmalloc(sizeof(*ack));
1057: ack->id = ++id;
1058: ack->offset = offset;
1059: ack->len = len;
1060: TAILQ_INSERT_TAIL(&acks, ack, tq);
1061:
1.21 djm 1062: buffer_clear(&msg);
1063: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1064: buffer_put_int(&msg, ack->id);
1.21 djm 1065: buffer_put_string(&msg, handle, handle_len);
1066: buffer_put_int64(&msg, offset);
1067: buffer_put_string(&msg, data, len);
1.23 djm 1068: send_msg(conn->fd_out, &msg);
1.33 deraadt 1069: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1070: id, (unsigned long long)offset, len);
1.22 djm 1071: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1072: break;
1073:
1.22 djm 1074: if (ack == NULL)
1075: fatal("Unexpected ACK %u", id);
1076:
1.28 markus 1077: if (id == startid || len == 0 ||
1.23 djm 1078: id - ackid >= conn->num_requests) {
1.32 markus 1079: u_int r_id;
1.31 djm 1080:
1.22 djm 1081: buffer_clear(&msg);
1.23 djm 1082: get_msg(conn->fd_in, &msg);
1.22 djm 1083: type = buffer_get_char(&msg);
1.31 djm 1084: r_id = buffer_get_int(&msg);
1.22 djm 1085:
1086: if (type != SSH2_FXP_STATUS)
1087: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1088: "got %d", SSH2_FXP_STATUS, type);
1089:
1090: status = buffer_get_int(&msg);
1091: debug3("SSH2_FXP_STATUS %d", status);
1092:
1093: /* Find the request in our queue */
1094: for(ack = TAILQ_FIRST(&acks);
1.31 djm 1095: ack != NULL && ack->id != r_id;
1.22 djm 1096: ack = TAILQ_NEXT(ack, tq))
1097: ;
1098: if (ack == NULL)
1.33 deraadt 1099: fatal("Can't find request for ID %u", r_id);
1.22 djm 1100: TAILQ_REMOVE(&acks, ack, tq);
1101:
1.21 djm 1102: if (status != SSH2_FX_OK) {
1103: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1104: remote_path, fx2txt(status));
1.23 djm 1105: do_close(conn, handle, handle_len);
1.21 djm 1106: close(local_fd);
1107: goto done;
1108: }
1.33 deraadt 1109: debug3("In write loop, ack for %u %u bytes at %llu",
1.26 itojun 1110: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1111: ++ackid;
1.34 deraadt 1112: xfree(ack);
1.1 djm 1113: }
1114: offset += len;
1115: }
1.39 ! fgsch 1116: if (showprogress)
! 1117: stop_progress_meter();
1.20 djm 1118: xfree(data);
1.1 djm 1119:
1120: if (close(local_fd) == -1) {
1121: error("Couldn't close local file \"%s\": %s", local_path,
1122: strerror(errno));
1.23 djm 1123: do_close(conn, handle, handle_len);
1.5 djm 1124: status = -1;
1125: goto done;
1.1 djm 1126: }
1127:
1.10 djm 1128: /* Override umask and utimes if asked */
1129: if (pflag)
1.23 djm 1130: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1131:
1.23 djm 1132: status = do_close(conn, handle, handle_len);
1.5 djm 1133:
1134: done:
1135: xfree(handle);
1136: buffer_free(&msg);
1.23 djm 1137: return(status);
1.1 djm 1138: }
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