Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.44.2.1
1.1 djm 1: /*
1.44.2.1! brad 2: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 3: *
1.44.2.1! brad 4: * Permission to use, copy, modify, and distribute this software for any
! 5: * purpose with or without fee is hereby granted, provided that the above
! 6: * copyright notice and this permission notice appear in all copies.
1.1 djm 7: *
1.44.2.1! brad 8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 djm 15: */
16:
17: /* XXX: memleaks */
18: /* XXX: signed vs unsigned */
1.23 djm 19: /* XXX: remove all logging, only return status codes */
1.1 djm 20: /* XXX: copy between two remote sites */
21:
22: #include "includes.h"
1.44.2.1! brad 23: RCSID("$OpenBSD: sftp-client.c,v 1.46 2004/02/17 05:39:51 djm Exp $");
1.21 djm 24:
25: #include <sys/queue.h>
1.1 djm 26:
27: #include "buffer.h"
28: #include "bufaux.h"
29: #include "getput.h"
30: #include "xmalloc.h"
31: #include "log.h"
32: #include "atomicio.h"
1.39 fgsch 33: #include "progressmeter.h"
1.1 djm 34:
35: #include "sftp.h"
36: #include "sftp-common.h"
37: #include "sftp-client.h"
38:
1.39 fgsch 39: extern int showprogress;
40:
1.21 djm 41: /* Minimum amount of data to read at at time */
42: #define MIN_READ_SIZE 512
43:
1.40 djm 44: /* Maximum packet size */
45: #define MAX_MSG_LENGTH (256 * 1024)
46:
1.23 djm 47: struct sftp_conn {
48: int fd_in;
49: int fd_out;
50: u_int transfer_buflen;
51: u_int num_requests;
52: u_int version;
53: u_int msg_id;
54: };
1.4 djm 55:
1.17 itojun 56: static void
1.1 djm 57: send_msg(int fd, Buffer *m)
58: {
1.40 djm 59: u_char mlen[4];
60:
61: if (buffer_len(m) > MAX_MSG_LENGTH)
62: fatal("Outbound message too long %u", buffer_len(m));
63:
64: /* Send length first */
65: PUT_32BIT(mlen, buffer_len(m));
1.44 deraadt 66: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) <= 0)
1.40 djm 67: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 68:
1.44 deraadt 69: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) <= 0)
1.1 djm 70: fatal("Couldn't send packet: %s", strerror(errno));
71:
1.40 djm 72: buffer_clear(m);
1.1 djm 73: }
74:
1.17 itojun 75: static void
1.1 djm 76: get_msg(int fd, Buffer *m)
77: {
1.40 djm 78: ssize_t len;
79: u_int msg_len;
1.1 djm 80:
1.40 djm 81: buffer_append_space(m, 4);
82: len = atomicio(read, fd, buffer_ptr(m), 4);
1.15 djm 83: if (len == 0)
84: fatal("Connection closed");
85: else if (len == -1)
1.1 djm 86: fatal("Couldn't read packet: %s", strerror(errno));
87:
1.40 djm 88: msg_len = buffer_get_int(m);
89: if (msg_len > MAX_MSG_LENGTH)
1.33 deraadt 90: fatal("Received message too long %u", msg_len);
1.1 djm 91:
1.40 djm 92: buffer_append_space(m, msg_len);
93: len = atomicio(read, fd, buffer_ptr(m), msg_len);
94: if (len == 0)
95: fatal("Connection closed");
96: else if (len == -1)
97: fatal("Read packet: %s", strerror(errno));
1.1 djm 98: }
99:
1.17 itojun 100: static void
1.1 djm 101: send_string_request(int fd, u_int id, u_int code, char *s,
102: u_int len)
103: {
104: Buffer msg;
105:
106: buffer_init(&msg);
107: buffer_put_char(&msg, code);
108: buffer_put_int(&msg, id);
109: buffer_put_string(&msg, s, len);
110: send_msg(fd, &msg);
1.33 deraadt 111: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 112: buffer_free(&msg);
113: }
114:
1.17 itojun 115: static void
1.1 djm 116: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
117: u_int len, Attrib *a)
118: {
119: Buffer msg;
120:
121: buffer_init(&msg);
122: buffer_put_char(&msg, code);
123: buffer_put_int(&msg, id);
124: buffer_put_string(&msg, s, len);
125: encode_attrib(&msg, a);
126: send_msg(fd, &msg);
1.33 deraadt 127: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 128: buffer_free(&msg);
129: }
130:
1.17 itojun 131: static u_int
1.33 deraadt 132: get_status(int fd, u_int expected_id)
1.1 djm 133: {
134: Buffer msg;
135: u_int type, id, status;
136:
137: buffer_init(&msg);
138: get_msg(fd, &msg);
139: type = buffer_get_char(&msg);
140: id = buffer_get_int(&msg);
141:
142: if (id != expected_id)
1.33 deraadt 143: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 144: if (type != SSH2_FXP_STATUS)
1.33 deraadt 145: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 146: SSH2_FXP_STATUS, type);
147:
148: status = buffer_get_int(&msg);
149: buffer_free(&msg);
150:
1.33 deraadt 151: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 152:
153: return(status);
154: }
155:
1.17 itojun 156: static char *
1.1 djm 157: get_handle(int fd, u_int expected_id, u_int *len)
158: {
159: Buffer msg;
160: u_int type, id;
161: char *handle;
162:
163: buffer_init(&msg);
164: get_msg(fd, &msg);
165: type = buffer_get_char(&msg);
166: id = buffer_get_int(&msg);
167:
168: if (id != expected_id)
1.33 deraadt 169: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 170: if (type == SSH2_FXP_STATUS) {
171: int status = buffer_get_int(&msg);
172:
173: error("Couldn't get handle: %s", fx2txt(status));
174: return(NULL);
175: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 176: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 177: SSH2_FXP_HANDLE, type);
178:
179: handle = buffer_get_string(&msg, len);
180: buffer_free(&msg);
181:
182: return(handle);
183: }
184:
1.17 itojun 185: static Attrib *
1.14 djm 186: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 187: {
188: Buffer msg;
189: u_int type, id;
190: Attrib *a;
191:
192: buffer_init(&msg);
193: get_msg(fd, &msg);
194:
195: type = buffer_get_char(&msg);
196: id = buffer_get_int(&msg);
197:
1.33 deraadt 198: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 199: if (id != expected_id)
1.33 deraadt 200: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 201: if (type == SSH2_FXP_STATUS) {
202: int status = buffer_get_int(&msg);
203:
1.14 djm 204: if (quiet)
205: debug("Couldn't stat remote file: %s", fx2txt(status));
206: else
207: error("Couldn't stat remote file: %s", fx2txt(status));
1.1 djm 208: return(NULL);
209: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 210: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 211: SSH2_FXP_ATTRS, type);
212: }
213: a = decode_attrib(&msg);
214: buffer_free(&msg);
215:
216: return(a);
217: }
218:
1.23 djm 219: struct sftp_conn *
220: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 221: {
1.33 deraadt 222: u_int type;
223: int version;
1.1 djm 224: Buffer msg;
1.23 djm 225: struct sftp_conn *ret;
1.1 djm 226:
227: buffer_init(&msg);
228: buffer_put_char(&msg, SSH2_FXP_INIT);
229: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
230: send_msg(fd_out, &msg);
231:
232: buffer_clear(&msg);
233:
234: get_msg(fd_in, &msg);
235:
1.3 stevesk 236: /* Expecting a VERSION reply */
1.1 djm 237: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 238: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 239: type);
240: buffer_free(&msg);
1.23 djm 241: return(NULL);
1.1 djm 242: }
243: version = buffer_get_int(&msg);
244:
245: debug2("Remote version: %d", version);
246:
247: /* Check for extensions */
248: while (buffer_len(&msg) > 0) {
249: char *name = buffer_get_string(&msg, NULL);
250: char *value = buffer_get_string(&msg, NULL);
251:
252: debug2("Init extension: \"%s\"", name);
253: xfree(name);
254: xfree(value);
255: }
256:
257: buffer_free(&msg);
1.11 djm 258:
1.23 djm 259: ret = xmalloc(sizeof(*ret));
260: ret->fd_in = fd_in;
261: ret->fd_out = fd_out;
262: ret->transfer_buflen = transfer_buflen;
263: ret->num_requests = num_requests;
264: ret->version = version;
265: ret->msg_id = 1;
266:
267: /* Some filexfer v.0 servers don't support large packets */
268: if (version == 0)
1.29 markus 269: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 270:
271: return(ret);
272: }
273:
274: u_int
275: sftp_proto_version(struct sftp_conn *conn)
276: {
277: return(conn->version);
1.1 djm 278: }
279:
280: int
1.23 djm 281: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 282: {
283: u_int id, status;
284: Buffer msg;
285:
286: buffer_init(&msg);
287:
1.23 djm 288: id = conn->msg_id++;
1.1 djm 289: buffer_put_char(&msg, SSH2_FXP_CLOSE);
290: buffer_put_int(&msg, id);
291: buffer_put_string(&msg, handle, handle_len);
1.23 djm 292: send_msg(conn->fd_out, &msg);
1.33 deraadt 293: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 294:
1.23 djm 295: status = get_status(conn->fd_in, id);
1.1 djm 296: if (status != SSH2_FX_OK)
297: error("Couldn't close file: %s", fx2txt(status));
298:
299: buffer_free(&msg);
300:
301: return(status);
302: }
303:
1.12 djm 304:
1.17 itojun 305: static int
1.23 djm 306: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 307: SFTP_DIRENT ***dir)
1.1 djm 308: {
309: Buffer msg;
1.13 markus 310: u_int type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 311: char *handle;
312:
1.23 djm 313: id = conn->msg_id++;
1.1 djm 314:
315: buffer_init(&msg);
316: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
317: buffer_put_int(&msg, id);
318: buffer_put_cstring(&msg, path);
1.23 djm 319: send_msg(conn->fd_out, &msg);
1.1 djm 320:
321: buffer_clear(&msg);
322:
1.23 djm 323: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 324: if (handle == NULL)
325: return(-1);
326:
1.12 djm 327: if (dir) {
328: ents = 0;
329: *dir = xmalloc(sizeof(**dir));
330: (*dir)[0] = NULL;
331: }
332:
1.19 deraadt 333: for (;;) {
1.1 djm 334: int count;
335:
1.23 djm 336: id = expected_id = conn->msg_id++;
1.1 djm 337:
1.33 deraadt 338: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 339:
340: buffer_clear(&msg);
341: buffer_put_char(&msg, SSH2_FXP_READDIR);
342: buffer_put_int(&msg, id);
343: buffer_put_string(&msg, handle, handle_len);
1.23 djm 344: send_msg(conn->fd_out, &msg);
1.1 djm 345:
346: buffer_clear(&msg);
347:
1.23 djm 348: get_msg(conn->fd_in, &msg);
1.1 djm 349:
350: type = buffer_get_char(&msg);
351: id = buffer_get_int(&msg);
352:
1.33 deraadt 353: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 354:
355: if (id != expected_id)
1.33 deraadt 356: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 357:
358: if (type == SSH2_FXP_STATUS) {
359: int status = buffer_get_int(&msg);
360:
361: debug3("Received SSH2_FXP_STATUS %d", status);
362:
363: if (status == SSH2_FX_EOF) {
364: break;
365: } else {
366: error("Couldn't read directory: %s",
367: fx2txt(status));
1.23 djm 368: do_close(conn, handle, handle_len);
1.42 markus 369: xfree(handle);
1.9 djm 370: return(status);
1.1 djm 371: }
372: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 373: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 374: SSH2_FXP_NAME, type);
375:
376: count = buffer_get_int(&msg);
1.7 markus 377: if (count == 0)
378: break;
1.8 stevesk 379: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 380: for (i = 0; i < count; i++) {
1.1 djm 381: char *filename, *longname;
382: Attrib *a;
383:
384: filename = buffer_get_string(&msg, NULL);
385: longname = buffer_get_string(&msg, NULL);
386: a = decode_attrib(&msg);
387:
1.12 djm 388: if (printflag)
389: printf("%s\n", longname);
390:
391: if (dir) {
1.16 markus 392: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 393: (ents + 2));
394: (*dir)[ents] = xmalloc(sizeof(***dir));
395: (*dir)[ents]->filename = xstrdup(filename);
396: (*dir)[ents]->longname = xstrdup(longname);
397: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
398: (*dir)[++ents] = NULL;
399: }
1.1 djm 400:
401: xfree(filename);
402: xfree(longname);
403: }
404: }
405:
406: buffer_free(&msg);
1.23 djm 407: do_close(conn, handle, handle_len);
1.1 djm 408: xfree(handle);
409:
410: return(0);
1.12 djm 411: }
412:
413: int
1.23 djm 414: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 415: {
1.23 djm 416: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 417: }
418:
419: void free_sftp_dirents(SFTP_DIRENT **s)
420: {
421: int i;
1.19 deraadt 422:
423: for (i = 0; s[i]; i++) {
1.12 djm 424: xfree(s[i]->filename);
425: xfree(s[i]->longname);
426: xfree(s[i]);
427: }
428: xfree(s);
429: }
430:
431: int
1.23 djm 432: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 433: {
434: u_int status, id;
435:
436: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
437:
1.23 djm 438: id = conn->msg_id++;
1.28 markus 439: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 440: strlen(path));
441: status = get_status(conn->fd_in, id);
1.1 djm 442: if (status != SSH2_FX_OK)
443: error("Couldn't delete file: %s", fx2txt(status));
444: return(status);
445: }
446:
447: int
1.23 djm 448: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 449: {
450: u_int status, id;
451:
1.23 djm 452: id = conn->msg_id++;
453: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 454: strlen(path), a);
455:
1.23 djm 456: status = get_status(conn->fd_in, id);
1.1 djm 457: if (status != SSH2_FX_OK)
458: error("Couldn't create directory: %s", fx2txt(status));
459:
460: return(status);
461: }
462:
463: int
1.23 djm 464: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 465: {
466: u_int status, id;
467:
1.23 djm 468: id = conn->msg_id++;
469: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
470: strlen(path));
1.1 djm 471:
1.23 djm 472: status = get_status(conn->fd_in, id);
1.1 djm 473: if (status != SSH2_FX_OK)
474: error("Couldn't remove directory: %s", fx2txt(status));
475:
476: return(status);
477: }
478:
479: Attrib *
1.23 djm 480: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 481: {
482: u_int id;
483:
1.23 djm 484: id = conn->msg_id++;
485:
1.28 markus 486: send_string_request(conn->fd_out, id,
487: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 488: path, strlen(path));
489:
490: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 491: }
492:
493: Attrib *
1.23 djm 494: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 495: {
496: u_int id;
497:
1.23 djm 498: if (conn->version == 0) {
499: if (quiet)
500: debug("Server version does not support lstat operation");
501: else
1.43 itojun 502: logit("Server version does not support lstat operation");
1.30 markus 503: return(do_stat(conn, path, quiet));
1.23 djm 504: }
505:
506: id = conn->msg_id++;
507: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
508: strlen(path));
509:
510: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 511: }
512:
513: Attrib *
1.23 djm 514: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 515: {
516: u_int id;
517:
1.23 djm 518: id = conn->msg_id++;
519: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
520: handle_len);
521:
522: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 523: }
524:
525: int
1.23 djm 526: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 527: {
528: u_int status, id;
529:
1.23 djm 530: id = conn->msg_id++;
531: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 532: strlen(path), a);
533:
1.23 djm 534: status = get_status(conn->fd_in, id);
1.1 djm 535: if (status != SSH2_FX_OK)
536: error("Couldn't setstat on \"%s\": %s", path,
537: fx2txt(status));
538:
539: return(status);
540: }
541:
542: int
1.23 djm 543: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 544: Attrib *a)
545: {
546: u_int status, id;
547:
1.23 djm 548: id = conn->msg_id++;
549: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 550: handle_len, a);
551:
1.23 djm 552: status = get_status(conn->fd_in, id);
1.1 djm 553: if (status != SSH2_FX_OK)
554: error("Couldn't fsetstat: %s", fx2txt(status));
555:
556: return(status);
557: }
558:
559: char *
1.23 djm 560: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 561: {
562: Buffer msg;
563: u_int type, expected_id, count, id;
564: char *filename, *longname;
565: Attrib *a;
566:
1.23 djm 567: expected_id = id = conn->msg_id++;
568: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
569: strlen(path));
1.1 djm 570:
571: buffer_init(&msg);
572:
1.23 djm 573: get_msg(conn->fd_in, &msg);
1.1 djm 574: type = buffer_get_char(&msg);
575: id = buffer_get_int(&msg);
576:
577: if (id != expected_id)
1.33 deraadt 578: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 579:
580: if (type == SSH2_FXP_STATUS) {
581: u_int status = buffer_get_int(&msg);
582:
583: error("Couldn't canonicalise: %s", fx2txt(status));
584: return(NULL);
585: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 586: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 587: SSH2_FXP_NAME, type);
588:
589: count = buffer_get_int(&msg);
590: if (count != 1)
591: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
592:
593: filename = buffer_get_string(&msg, NULL);
594: longname = buffer_get_string(&msg, NULL);
595: a = decode_attrib(&msg);
596:
597: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
598:
599: xfree(longname);
600:
601: buffer_free(&msg);
602:
603: return(filename);
604: }
605:
606: int
1.23 djm 607: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 608: {
609: Buffer msg;
610: u_int status, id;
611:
612: buffer_init(&msg);
613:
614: /* Send rename request */
1.23 djm 615: id = conn->msg_id++;
1.1 djm 616: buffer_put_char(&msg, SSH2_FXP_RENAME);
617: buffer_put_int(&msg, id);
618: buffer_put_cstring(&msg, oldpath);
619: buffer_put_cstring(&msg, newpath);
1.23 djm 620: send_msg(conn->fd_out, &msg);
1.1 djm 621: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
622: newpath);
623: buffer_free(&msg);
624:
1.23 djm 625: status = get_status(conn->fd_in, id);
1.1 djm 626: if (status != SSH2_FX_OK)
1.23 djm 627: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
628: newpath, fx2txt(status));
1.1 djm 629:
630: return(status);
1.11 djm 631: }
632:
633: int
1.23 djm 634: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 635: {
636: Buffer msg;
637: u_int status, id;
638:
1.23 djm 639: if (conn->version < 3) {
640: error("This server does not support the symlink operation");
641: return(SSH2_FX_OP_UNSUPPORTED);
642: }
643:
1.11 djm 644: buffer_init(&msg);
645:
646: /* Send rename request */
1.23 djm 647: id = conn->msg_id++;
1.11 djm 648: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
649: buffer_put_int(&msg, id);
650: buffer_put_cstring(&msg, oldpath);
651: buffer_put_cstring(&msg, newpath);
1.23 djm 652: send_msg(conn->fd_out, &msg);
1.11 djm 653: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
654: newpath);
655: buffer_free(&msg);
656:
1.23 djm 657: status = get_status(conn->fd_in, id);
1.11 djm 658: if (status != SSH2_FX_OK)
1.36 markus 659: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 660: newpath, fx2txt(status));
1.11 djm 661:
662: return(status);
663: }
664:
665: char *
1.23 djm 666: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 667: {
668: Buffer msg;
669: u_int type, expected_id, count, id;
670: char *filename, *longname;
671: Attrib *a;
672:
1.23 djm 673: expected_id = id = conn->msg_id++;
674: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
675: strlen(path));
1.11 djm 676:
677: buffer_init(&msg);
678:
1.23 djm 679: get_msg(conn->fd_in, &msg);
1.11 djm 680: type = buffer_get_char(&msg);
681: id = buffer_get_int(&msg);
682:
683: if (id != expected_id)
1.33 deraadt 684: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 685:
686: if (type == SSH2_FXP_STATUS) {
687: u_int status = buffer_get_int(&msg);
688:
689: error("Couldn't readlink: %s", fx2txt(status));
690: return(NULL);
691: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 692: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 693: SSH2_FXP_NAME, type);
694:
695: count = buffer_get_int(&msg);
696: if (count != 1)
697: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
698:
699: filename = buffer_get_string(&msg, NULL);
700: longname = buffer_get_string(&msg, NULL);
701: a = decode_attrib(&msg);
702:
703: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
704:
705: xfree(longname);
706:
707: buffer_free(&msg);
708:
709: return(filename);
1.1 djm 710: }
711:
1.21 djm 712: static void
713: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
714: char *handle, u_int handle_len)
715: {
716: Buffer msg;
1.28 markus 717:
1.21 djm 718: buffer_init(&msg);
719: buffer_clear(&msg);
720: buffer_put_char(&msg, SSH2_FXP_READ);
721: buffer_put_int(&msg, id);
722: buffer_put_string(&msg, handle, handle_len);
723: buffer_put_int64(&msg, offset);
724: buffer_put_int(&msg, len);
725: send_msg(fd_out, &msg);
726: buffer_free(&msg);
1.28 markus 727: }
1.21 djm 728:
1.1 djm 729: int
1.23 djm 730: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
731: int pflag)
1.1 djm 732: {
1.21 djm 733: Attrib junk, *a;
734: Buffer msg;
1.1 djm 735: char *handle;
1.21 djm 736: int local_fd, status, num_req, max_req, write_error;
737: int read_error, write_errno;
738: u_int64_t offset, size;
1.23 djm 739: u_int handle_len, mode, type, id, buflen;
1.39 fgsch 740: off_t progress_counter;
1.21 djm 741: struct request {
742: u_int id;
743: u_int len;
744: u_int64_t offset;
1.28 markus 745: TAILQ_ENTRY(request) tq;
1.21 djm 746: };
747: TAILQ_HEAD(reqhead, request) requests;
748: struct request *req;
749:
750: TAILQ_INIT(&requests);
1.1 djm 751:
1.23 djm 752: a = do_stat(conn, remote_path, 0);
1.1 djm 753: if (a == NULL)
754: return(-1);
755:
756: /* XXX: should we preserve set[ug]id? */
757: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 758: mode = a->perm & 0777;
1.1 djm 759: else
760: mode = 0666;
761:
1.14 djm 762: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 763: (!S_ISREG(a->perm))) {
764: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 765: return(-1);
766: }
767:
1.21 djm 768: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
769: size = a->size;
770: else
771: size = 0;
772:
1.23 djm 773: buflen = conn->transfer_buflen;
1.1 djm 774: buffer_init(&msg);
775:
776: /* Send open request */
1.23 djm 777: id = conn->msg_id++;
1.1 djm 778: buffer_put_char(&msg, SSH2_FXP_OPEN);
779: buffer_put_int(&msg, id);
780: buffer_put_cstring(&msg, remote_path);
781: buffer_put_int(&msg, SSH2_FXF_READ);
782: attrib_clear(&junk); /* Send empty attributes */
783: encode_attrib(&msg, &junk);
1.23 djm 784: send_msg(conn->fd_out, &msg);
1.33 deraadt 785: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 786:
1.23 djm 787: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 788: if (handle == NULL) {
789: buffer_free(&msg);
790: return(-1);
791: }
792:
1.44.2.1! brad 793: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 794: mode | S_IWRITE);
1.23 djm 795: if (local_fd == -1) {
796: error("Couldn't open local file \"%s\" for writing: %s",
797: local_path, strerror(errno));
1.24 markus 798: buffer_free(&msg);
799: xfree(handle);
1.23 djm 800: return(-1);
801: }
802:
1.1 djm 803: /* Read from remote and write to local */
1.21 djm 804: write_error = read_error = write_errno = num_req = offset = 0;
805: max_req = 1;
1.39 fgsch 806: progress_counter = 0;
807:
808: if (showprogress) {
809: if (size)
810: start_progress_meter(remote_path, size,
811: &progress_counter);
812: else
813: printf("Fetching %s to %s\n", remote_path, local_path);
814: }
815:
1.21 djm 816: while (num_req > 0 || max_req > 0) {
817: char *data;
1.1 djm 818: u_int len;
819:
1.21 djm 820: /* Send some more requests */
821: while (num_req < max_req) {
1.28 markus 822: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 823: (unsigned long long)offset,
824: (unsigned long long)offset + buflen - 1,
825: num_req, max_req);
1.21 djm 826: req = xmalloc(sizeof(*req));
1.23 djm 827: req->id = conn->msg_id++;
1.21 djm 828: req->len = buflen;
829: req->offset = offset;
830: offset += buflen;
831: num_req++;
832: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 833: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 834: req->len, handle, handle_len);
835: }
1.1 djm 836:
837: buffer_clear(&msg);
1.23 djm 838: get_msg(conn->fd_in, &msg);
1.1 djm 839: type = buffer_get_char(&msg);
840: id = buffer_get_int(&msg);
1.33 deraadt 841: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 842:
843: /* Find the request in our queue */
844: for(req = TAILQ_FIRST(&requests);
845: req != NULL && req->id != id;
846: req = TAILQ_NEXT(req, tq))
847: ;
848: if (req == NULL)
849: fatal("Unexpected reply %u", id);
850:
851: switch (type) {
852: case SSH2_FXP_STATUS:
1.5 djm 853: status = buffer_get_int(&msg);
1.21 djm 854: if (status != SSH2_FX_EOF)
855: read_error = 1;
856: max_req = 0;
857: TAILQ_REMOVE(&requests, req, tq);
858: xfree(req);
859: num_req--;
860: break;
861: case SSH2_FXP_DATA:
862: data = buffer_get_string(&msg, &len);
1.26 itojun 863: debug3("Received data %llu -> %llu",
1.28 markus 864: (unsigned long long)req->offset,
1.26 itojun 865: (unsigned long long)req->offset + len - 1);
1.21 djm 866: if (len > req->len)
867: fatal("Received more data than asked for "
1.37 deraadt 868: "%u > %u", len, req->len);
1.21 djm 869: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 870: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 871: !write_error) {
872: write_errno = errno;
873: write_error = 1;
874: max_req = 0;
875: }
1.39 fgsch 876: progress_counter += len;
1.21 djm 877: xfree(data);
1.1 djm 878:
1.21 djm 879: if (len == req->len) {
880: TAILQ_REMOVE(&requests, req, tq);
881: xfree(req);
882: num_req--;
883: } else {
884: /* Resend the request for the missing data */
885: debug3("Short data block, re-requesting "
1.26 itojun 886: "%llu -> %llu (%2d)",
1.28 markus 887: (unsigned long long)req->offset + len,
1.27 itojun 888: (unsigned long long)req->offset +
889: req->len - 1, num_req);
1.23 djm 890: req->id = conn->msg_id++;
1.21 djm 891: req->len -= len;
892: req->offset += len;
1.28 markus 893: send_read_request(conn->fd_out, req->id,
1.23 djm 894: req->offset, req->len, handle, handle_len);
1.21 djm 895: /* Reduce the request size */
896: if (len < buflen)
897: buflen = MAX(MIN_READ_SIZE, len);
898: }
899: if (max_req > 0) { /* max_req = 0 iff EOF received */
900: if (size > 0 && offset > size) {
901: /* Only one request at a time
902: * after the expected EOF */
903: debug3("Finish at %llu (%2d)",
1.26 itojun 904: (unsigned long long)offset,
905: num_req);
1.21 djm 906: max_req = 1;
907: }
1.23 djm 908: else if (max_req < conn->num_requests + 1) {
1.21 djm 909: ++max_req;
910: }
1.1 djm 911: }
1.21 djm 912: break;
913: default:
1.33 deraadt 914: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 915: SSH2_FXP_DATA, type);
916: }
1.21 djm 917: }
1.1 djm 918:
1.39 fgsch 919: if (showprogress && size)
920: stop_progress_meter();
921:
1.21 djm 922: /* Sanity check */
923: if (TAILQ_FIRST(&requests) != NULL)
924: fatal("Transfer complete, but requests still in queue");
925:
926: if (read_error) {
1.28 markus 927: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 928: remote_path, fx2txt(status));
1.23 djm 929: do_close(conn, handle, handle_len);
1.21 djm 930: } else if (write_error) {
931: error("Couldn't write to \"%s\": %s", local_path,
932: strerror(write_errno));
933: status = -1;
1.23 djm 934: do_close(conn, handle, handle_len);
1.21 djm 935: } else {
1.23 djm 936: status = do_close(conn, handle, handle_len);
1.21 djm 937:
938: /* Override umask and utimes if asked */
939: if (pflag && fchmod(local_fd, mode) == -1)
940: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 941: strerror(errno));
1.21 djm 942: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
943: struct timeval tv[2];
944: tv[0].tv_sec = a->atime;
945: tv[1].tv_sec = a->mtime;
946: tv[0].tv_usec = tv[1].tv_usec = 0;
947: if (utimes(local_path, tv) == -1)
948: error("Can't set times on \"%s\": %s",
1.37 deraadt 949: local_path, strerror(errno));
1.1 djm 950: }
1.10 djm 951: }
1.5 djm 952: close(local_fd);
953: buffer_free(&msg);
1.1 djm 954: xfree(handle);
1.23 djm 955:
956: return(status);
1.1 djm 957: }
958:
959: int
1.23 djm 960: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
961: int pflag)
1.1 djm 962: {
1.20 djm 963: int local_fd, status;
1.22 djm 964: u_int handle_len, id, type;
1.1 djm 965: u_int64_t offset;
1.20 djm 966: char *handle, *data;
1.1 djm 967: Buffer msg;
968: struct stat sb;
969: Attrib a;
1.21 djm 970: u_int32_t startid;
971: u_int32_t ackid;
1.22 djm 972: struct outstanding_ack {
973: u_int id;
974: u_int len;
975: u_int64_t offset;
1.28 markus 976: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 977: };
978: TAILQ_HEAD(ackhead, outstanding_ack) acks;
979: struct outstanding_ack *ack;
980:
981: TAILQ_INIT(&acks);
1.1 djm 982:
983: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
984: error("Couldn't open local file \"%s\" for reading: %s",
985: local_path, strerror(errno));
986: return(-1);
987: }
988: if (fstat(local_fd, &sb) == -1) {
989: error("Couldn't fstat local file \"%s\": %s",
990: local_path, strerror(errno));
1.41 djm 991: close(local_fd);
992: return(-1);
993: }
994: if (!S_ISREG(sb.st_mode)) {
995: error("%s is not a regular file", local_path);
1.1 djm 996: close(local_fd);
997: return(-1);
998: }
999: stat_to_attrib(&sb, &a);
1000:
1001: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1002: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1003: a.perm &= 0777;
1004: if (!pflag)
1005: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1006:
1007: buffer_init(&msg);
1008:
1009: /* Send open request */
1.23 djm 1010: id = conn->msg_id++;
1.1 djm 1011: buffer_put_char(&msg, SSH2_FXP_OPEN);
1012: buffer_put_int(&msg, id);
1013: buffer_put_cstring(&msg, remote_path);
1014: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1015: encode_attrib(&msg, &a);
1.23 djm 1016: send_msg(conn->fd_out, &msg);
1.33 deraadt 1017: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1018:
1019: buffer_clear(&msg);
1020:
1.23 djm 1021: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1022: if (handle == NULL) {
1023: close(local_fd);
1024: buffer_free(&msg);
1025: return(-1);
1026: }
1027:
1.21 djm 1028: startid = ackid = id + 1;
1.23 djm 1029: data = xmalloc(conn->transfer_buflen);
1.20 djm 1030:
1.1 djm 1031: /* Read from local and write to remote */
1032: offset = 0;
1.39 fgsch 1033: if (showprogress)
1034: start_progress_meter(local_path, sb.st_size, &offset);
1035: else
1036: printf("Uploading %s to %s\n", local_path, remote_path);
1037:
1.19 deraadt 1038: for (;;) {
1.1 djm 1039: int len;
1040:
1041: /*
1042: * Can't use atomicio here because it returns 0 on EOF, thus losing
1043: * the last block of the file
1044: */
1045: do
1.23 djm 1046: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1047: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1048:
1049: if (len == -1)
1050: fatal("Couldn't read from \"%s\": %s", local_path,
1051: strerror(errno));
1.21 djm 1052:
1053: if (len != 0) {
1.22 djm 1054: ack = xmalloc(sizeof(*ack));
1055: ack->id = ++id;
1056: ack->offset = offset;
1057: ack->len = len;
1058: TAILQ_INSERT_TAIL(&acks, ack, tq);
1059:
1.21 djm 1060: buffer_clear(&msg);
1061: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1062: buffer_put_int(&msg, ack->id);
1.21 djm 1063: buffer_put_string(&msg, handle, handle_len);
1064: buffer_put_int64(&msg, offset);
1065: buffer_put_string(&msg, data, len);
1.23 djm 1066: send_msg(conn->fd_out, &msg);
1.33 deraadt 1067: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1068: id, (unsigned long long)offset, len);
1.22 djm 1069: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1070: break;
1071:
1.22 djm 1072: if (ack == NULL)
1073: fatal("Unexpected ACK %u", id);
1074:
1.28 markus 1075: if (id == startid || len == 0 ||
1.23 djm 1076: id - ackid >= conn->num_requests) {
1.32 markus 1077: u_int r_id;
1.31 djm 1078:
1.22 djm 1079: buffer_clear(&msg);
1.23 djm 1080: get_msg(conn->fd_in, &msg);
1.22 djm 1081: type = buffer_get_char(&msg);
1.31 djm 1082: r_id = buffer_get_int(&msg);
1.22 djm 1083:
1084: if (type != SSH2_FXP_STATUS)
1085: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1086: "got %d", SSH2_FXP_STATUS, type);
1087:
1088: status = buffer_get_int(&msg);
1089: debug3("SSH2_FXP_STATUS %d", status);
1090:
1091: /* Find the request in our queue */
1092: for(ack = TAILQ_FIRST(&acks);
1.31 djm 1093: ack != NULL && ack->id != r_id;
1.22 djm 1094: ack = TAILQ_NEXT(ack, tq))
1095: ;
1096: if (ack == NULL)
1.33 deraadt 1097: fatal("Can't find request for ID %u", r_id);
1.22 djm 1098: TAILQ_REMOVE(&acks, ack, tq);
1099:
1.21 djm 1100: if (status != SSH2_FX_OK) {
1101: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1102: remote_path, fx2txt(status));
1.23 djm 1103: do_close(conn, handle, handle_len);
1.21 djm 1104: close(local_fd);
1.42 markus 1105: xfree(data);
1106: xfree(ack);
1.21 djm 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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