Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.66
1.66 ! stevesk 1: /* $OpenBSD: sftp-client.c,v 1.65 2006/04/16 00:54:10 djm Exp $ */
1.1 djm 2: /*
1.46 djm 3: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 4: *
1.46 djm 5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
1.1 djm 8: *
1.46 djm 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 djm 16: */
17:
18: /* XXX: memleaks */
19: /* XXX: signed vs unsigned */
1.23 djm 20: /* XXX: remove all logging, only return status codes */
1.1 djm 21: /* XXX: copy between two remote sites */
22:
23: #include "includes.h"
1.21 djm 24:
25: #include <sys/queue.h>
1.60 stevesk 26: #include <sys/types.h>
27: #include <sys/stat.h>
1.66 ! stevesk 28:
! 29: #include <fcntl.h>
1.1 djm 30:
31: #include "buffer.h"
32: #include "bufaux.h"
33: #include "xmalloc.h"
34: #include "log.h"
35: #include "atomicio.h"
1.39 fgsch 36: #include "progressmeter.h"
1.64 djm 37: #include "misc.h"
1.1 djm 38:
39: #include "sftp.h"
40: #include "sftp-common.h"
41: #include "sftp-client.h"
42:
1.49 djm 43: extern volatile sig_atomic_t interrupted;
1.39 fgsch 44: extern int showprogress;
45:
1.59 david 46: /* Minimum amount of data to read at a time */
1.21 djm 47: #define MIN_READ_SIZE 512
48:
1.23 djm 49: struct sftp_conn {
50: int fd_in;
51: int fd_out;
52: u_int transfer_buflen;
53: u_int num_requests;
54: u_int version;
55: u_int msg_id;
56: };
1.4 djm 57:
1.17 itojun 58: static void
1.1 djm 59: send_msg(int fd, Buffer *m)
60: {
1.40 djm 61: u_char mlen[4];
1.65 djm 62: struct iovec iov[2];
1.40 djm 63:
1.58 djm 64: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 65: fatal("Outbound message too long %u", buffer_len(m));
66:
67: /* Send length first */
1.64 djm 68: put_u32(mlen, buffer_len(m));
1.65 djm 69: iov[0].iov_base = mlen;
70: iov[0].iov_len = sizeof(mlen);
71: iov[1].iov_base = buffer_ptr(m);
72: iov[1].iov_len = buffer_len(m);
73:
74: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 75: fatal("Couldn't send packet: %s", strerror(errno));
76:
1.40 djm 77: buffer_clear(m);
1.1 djm 78: }
79:
1.17 itojun 80: static void
1.1 djm 81: get_msg(int fd, Buffer *m)
82: {
1.40 djm 83: u_int msg_len;
1.1 djm 84:
1.40 djm 85: buffer_append_space(m, 4);
1.54 avsm 86: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
87: if (errno == EPIPE)
88: fatal("Connection closed");
89: else
90: fatal("Couldn't read packet: %s", strerror(errno));
91: }
1.1 djm 92:
1.40 djm 93: msg_len = buffer_get_int(m);
1.58 djm 94: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 95: fatal("Received message too long %u", msg_len);
1.1 djm 96:
1.40 djm 97: buffer_append_space(m, msg_len);
1.54 avsm 98: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
99: if (errno == EPIPE)
100: fatal("Connection closed");
101: else
102: fatal("Read packet: %s", strerror(errno));
103: }
1.1 djm 104: }
105:
1.17 itojun 106: static void
1.1 djm 107: send_string_request(int fd, u_int id, u_int code, char *s,
108: u_int len)
109: {
110: Buffer msg;
111:
112: buffer_init(&msg);
113: buffer_put_char(&msg, code);
114: buffer_put_int(&msg, id);
115: buffer_put_string(&msg, s, len);
116: send_msg(fd, &msg);
1.33 deraadt 117: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 118: buffer_free(&msg);
119: }
120:
1.17 itojun 121: static void
1.1 djm 122: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
123: u_int len, Attrib *a)
124: {
125: Buffer msg;
126:
127: buffer_init(&msg);
128: buffer_put_char(&msg, code);
129: buffer_put_int(&msg, id);
130: buffer_put_string(&msg, s, len);
131: encode_attrib(&msg, a);
132: send_msg(fd, &msg);
1.33 deraadt 133: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 134: buffer_free(&msg);
135: }
136:
1.17 itojun 137: static u_int
1.33 deraadt 138: get_status(int fd, u_int expected_id)
1.1 djm 139: {
140: Buffer msg;
141: u_int type, id, status;
142:
143: buffer_init(&msg);
144: get_msg(fd, &msg);
145: type = buffer_get_char(&msg);
146: id = buffer_get_int(&msg);
147:
148: if (id != expected_id)
1.33 deraadt 149: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 150: if (type != SSH2_FXP_STATUS)
1.33 deraadt 151: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 152: SSH2_FXP_STATUS, type);
153:
154: status = buffer_get_int(&msg);
155: buffer_free(&msg);
156:
1.33 deraadt 157: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 158:
159: return(status);
160: }
161:
1.17 itojun 162: static char *
1.1 djm 163: get_handle(int fd, u_int expected_id, u_int *len)
164: {
165: Buffer msg;
166: u_int type, id;
167: char *handle;
168:
169: buffer_init(&msg);
170: get_msg(fd, &msg);
171: type = buffer_get_char(&msg);
172: id = buffer_get_int(&msg);
173:
174: if (id != expected_id)
1.33 deraadt 175: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 176: if (type == SSH2_FXP_STATUS) {
177: int status = buffer_get_int(&msg);
178:
179: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 180: buffer_free(&msg);
1.1 djm 181: return(NULL);
182: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 183: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 184: SSH2_FXP_HANDLE, type);
185:
186: handle = buffer_get_string(&msg, len);
187: buffer_free(&msg);
188:
189: return(handle);
190: }
191:
1.17 itojun 192: static Attrib *
1.14 djm 193: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 194: {
195: Buffer msg;
196: u_int type, id;
197: Attrib *a;
198:
199: buffer_init(&msg);
200: get_msg(fd, &msg);
201:
202: type = buffer_get_char(&msg);
203: id = buffer_get_int(&msg);
204:
1.33 deraadt 205: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 206: if (id != expected_id)
1.33 deraadt 207: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 208: if (type == SSH2_FXP_STATUS) {
209: int status = buffer_get_int(&msg);
210:
1.14 djm 211: if (quiet)
212: debug("Couldn't stat remote file: %s", fx2txt(status));
213: else
214: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 215: buffer_free(&msg);
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;
1.55 djm 318: u_int count, 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:
1.49 djm 341: for (; !interrupted;) {
1.23 djm 342: id = expected_id = conn->msg_id++;
1.1 djm 343:
1.33 deraadt 344: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 345:
346: buffer_clear(&msg);
347: buffer_put_char(&msg, SSH2_FXP_READDIR);
348: buffer_put_int(&msg, id);
349: buffer_put_string(&msg, handle, handle_len);
1.23 djm 350: send_msg(conn->fd_out, &msg);
1.1 djm 351:
352: buffer_clear(&msg);
353:
1.23 djm 354: get_msg(conn->fd_in, &msg);
1.1 djm 355:
356: type = buffer_get_char(&msg);
357: id = buffer_get_int(&msg);
358:
1.33 deraadt 359: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 360:
361: if (id != expected_id)
1.33 deraadt 362: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 363:
364: if (type == SSH2_FXP_STATUS) {
365: int status = buffer_get_int(&msg);
366:
367: debug3("Received SSH2_FXP_STATUS %d", status);
368:
369: if (status == SSH2_FX_EOF) {
370: break;
371: } else {
372: error("Couldn't read directory: %s",
373: fx2txt(status));
1.23 djm 374: do_close(conn, handle, handle_len);
1.42 markus 375: xfree(handle);
1.9 djm 376: return(status);
1.1 djm 377: }
378: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 379: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 380: SSH2_FXP_NAME, type);
381:
382: count = buffer_get_int(&msg);
1.7 markus 383: if (count == 0)
384: break;
1.8 stevesk 385: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 386: for (i = 0; i < count; i++) {
1.1 djm 387: char *filename, *longname;
388: Attrib *a;
389:
390: filename = buffer_get_string(&msg, NULL);
391: longname = buffer_get_string(&msg, NULL);
392: a = decode_attrib(&msg);
393:
1.12 djm 394: if (printflag)
395: printf("%s\n", longname);
396:
397: if (dir) {
1.62 djm 398: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 399: (*dir)[ents] = xmalloc(sizeof(***dir));
400: (*dir)[ents]->filename = xstrdup(filename);
401: (*dir)[ents]->longname = xstrdup(longname);
402: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
403: (*dir)[++ents] = NULL;
404: }
1.1 djm 405:
406: xfree(filename);
407: xfree(longname);
408: }
409: }
410:
411: buffer_free(&msg);
1.23 djm 412: do_close(conn, handle, handle_len);
1.1 djm 413: xfree(handle);
414:
1.49 djm 415: /* Don't return partial matches on interrupt */
416: if (interrupted && dir != NULL && *dir != NULL) {
417: free_sftp_dirents(*dir);
418: *dir = xmalloc(sizeof(**dir));
419: **dir = NULL;
420: }
421:
1.1 djm 422: return(0);
1.12 djm 423: }
424:
425: int
1.23 djm 426: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 427: {
1.23 djm 428: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 429: }
430:
431: void free_sftp_dirents(SFTP_DIRENT **s)
432: {
433: int i;
1.19 deraadt 434:
435: for (i = 0; s[i]; i++) {
1.12 djm 436: xfree(s[i]->filename);
437: xfree(s[i]->longname);
438: xfree(s[i]);
439: }
440: xfree(s);
441: }
442:
443: int
1.23 djm 444: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 445: {
446: u_int status, id;
447:
448: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
449:
1.23 djm 450: id = conn->msg_id++;
1.28 markus 451: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 452: strlen(path));
453: status = get_status(conn->fd_in, id);
1.1 djm 454: if (status != SSH2_FX_OK)
455: error("Couldn't delete file: %s", fx2txt(status));
456: return(status);
457: }
458:
459: int
1.23 djm 460: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 461: {
462: u_int status, id;
463:
1.23 djm 464: id = conn->msg_id++;
465: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 466: strlen(path), a);
467:
1.23 djm 468: status = get_status(conn->fd_in, id);
1.1 djm 469: if (status != SSH2_FX_OK)
470: error("Couldn't create directory: %s", fx2txt(status));
471:
472: return(status);
473: }
474:
475: int
1.23 djm 476: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 477: {
478: u_int status, id;
479:
1.23 djm 480: id = conn->msg_id++;
481: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
482: strlen(path));
1.1 djm 483:
1.23 djm 484: status = get_status(conn->fd_in, id);
1.1 djm 485: if (status != SSH2_FX_OK)
486: error("Couldn't remove directory: %s", fx2txt(status));
487:
488: return(status);
489: }
490:
491: Attrib *
1.23 djm 492: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 493: {
494: u_int id;
495:
1.23 djm 496: id = conn->msg_id++;
497:
1.28 markus 498: send_string_request(conn->fd_out, id,
499: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 500: path, strlen(path));
501:
502: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 503: }
504:
505: Attrib *
1.23 djm 506: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 507: {
508: u_int id;
509:
1.23 djm 510: if (conn->version == 0) {
511: if (quiet)
512: debug("Server version does not support lstat operation");
513: else
1.43 itojun 514: logit("Server version does not support lstat operation");
1.30 markus 515: return(do_stat(conn, path, quiet));
1.23 djm 516: }
517:
518: id = conn->msg_id++;
519: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
520: strlen(path));
521:
522: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 523: }
524:
525: Attrib *
1.23 djm 526: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 527: {
528: u_int id;
529:
1.23 djm 530: id = conn->msg_id++;
531: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
532: handle_len);
533:
534: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 535: }
536:
537: int
1.23 djm 538: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 539: {
540: u_int status, id;
541:
1.23 djm 542: id = conn->msg_id++;
543: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 544: strlen(path), a);
545:
1.23 djm 546: status = get_status(conn->fd_in, id);
1.1 djm 547: if (status != SSH2_FX_OK)
548: error("Couldn't setstat on \"%s\": %s", path,
549: fx2txt(status));
550:
551: return(status);
552: }
553:
554: int
1.23 djm 555: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 556: Attrib *a)
557: {
558: u_int status, id;
559:
1.23 djm 560: id = conn->msg_id++;
561: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 562: handle_len, a);
563:
1.23 djm 564: status = get_status(conn->fd_in, id);
1.1 djm 565: if (status != SSH2_FX_OK)
566: error("Couldn't fsetstat: %s", fx2txt(status));
567:
568: return(status);
569: }
570:
571: char *
1.23 djm 572: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 573: {
574: Buffer msg;
575: u_int type, expected_id, count, id;
576: char *filename, *longname;
577: Attrib *a;
578:
1.23 djm 579: expected_id = id = conn->msg_id++;
580: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
581: strlen(path));
1.1 djm 582:
583: buffer_init(&msg);
584:
1.23 djm 585: get_msg(conn->fd_in, &msg);
1.1 djm 586: type = buffer_get_char(&msg);
587: id = buffer_get_int(&msg);
588:
589: if (id != expected_id)
1.33 deraadt 590: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 591:
592: if (type == SSH2_FXP_STATUS) {
593: u_int status = buffer_get_int(&msg);
594:
595: error("Couldn't canonicalise: %s", fx2txt(status));
596: return(NULL);
597: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 598: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 599: SSH2_FXP_NAME, type);
600:
601: count = buffer_get_int(&msg);
602: if (count != 1)
603: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
604:
605: filename = buffer_get_string(&msg, NULL);
606: longname = buffer_get_string(&msg, NULL);
607: a = decode_attrib(&msg);
608:
609: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
610:
611: xfree(longname);
612:
613: buffer_free(&msg);
614:
615: return(filename);
616: }
617:
618: int
1.23 djm 619: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 620: {
621: Buffer msg;
622: u_int status, id;
623:
624: buffer_init(&msg);
625:
626: /* Send rename request */
1.23 djm 627: id = conn->msg_id++;
1.1 djm 628: buffer_put_char(&msg, SSH2_FXP_RENAME);
629: buffer_put_int(&msg, id);
630: buffer_put_cstring(&msg, oldpath);
631: buffer_put_cstring(&msg, newpath);
1.23 djm 632: send_msg(conn->fd_out, &msg);
1.1 djm 633: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
634: newpath);
635: buffer_free(&msg);
636:
1.23 djm 637: status = get_status(conn->fd_in, id);
1.1 djm 638: if (status != SSH2_FX_OK)
1.23 djm 639: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
640: newpath, fx2txt(status));
1.1 djm 641:
642: return(status);
1.11 djm 643: }
644:
645: int
1.23 djm 646: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 647: {
648: Buffer msg;
649: u_int status, id;
650:
1.23 djm 651: if (conn->version < 3) {
652: error("This server does not support the symlink operation");
653: return(SSH2_FX_OP_UNSUPPORTED);
654: }
655:
1.11 djm 656: buffer_init(&msg);
657:
1.48 djm 658: /* Send symlink request */
1.23 djm 659: id = conn->msg_id++;
1.11 djm 660: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
661: buffer_put_int(&msg, id);
662: buffer_put_cstring(&msg, oldpath);
663: buffer_put_cstring(&msg, newpath);
1.23 djm 664: send_msg(conn->fd_out, &msg);
1.11 djm 665: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
666: newpath);
667: buffer_free(&msg);
668:
1.23 djm 669: status = get_status(conn->fd_in, id);
1.11 djm 670: if (status != SSH2_FX_OK)
1.36 markus 671: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 672: newpath, fx2txt(status));
1.11 djm 673:
674: return(status);
675: }
676:
677: char *
1.23 djm 678: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 679: {
680: Buffer msg;
681: u_int type, expected_id, count, id;
682: char *filename, *longname;
683: Attrib *a;
684:
1.23 djm 685: expected_id = id = conn->msg_id++;
686: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
687: strlen(path));
1.11 djm 688:
689: buffer_init(&msg);
690:
1.23 djm 691: get_msg(conn->fd_in, &msg);
1.11 djm 692: type = buffer_get_char(&msg);
693: id = buffer_get_int(&msg);
694:
695: if (id != expected_id)
1.33 deraadt 696: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 697:
698: if (type == SSH2_FXP_STATUS) {
699: u_int status = buffer_get_int(&msg);
700:
701: error("Couldn't readlink: %s", fx2txt(status));
702: return(NULL);
703: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 704: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 705: SSH2_FXP_NAME, type);
706:
707: count = buffer_get_int(&msg);
708: if (count != 1)
709: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
710:
711: filename = buffer_get_string(&msg, NULL);
712: longname = buffer_get_string(&msg, NULL);
713: a = decode_attrib(&msg);
714:
715: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
716:
717: xfree(longname);
718:
719: buffer_free(&msg);
720:
721: return(filename);
1.1 djm 722: }
723:
1.21 djm 724: static void
725: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
726: char *handle, u_int handle_len)
727: {
728: Buffer msg;
1.28 markus 729:
1.21 djm 730: buffer_init(&msg);
731: buffer_clear(&msg);
732: buffer_put_char(&msg, SSH2_FXP_READ);
733: buffer_put_int(&msg, id);
734: buffer_put_string(&msg, handle, handle_len);
735: buffer_put_int64(&msg, offset);
736: buffer_put_int(&msg, len);
737: send_msg(fd_out, &msg);
738: buffer_free(&msg);
1.28 markus 739: }
1.21 djm 740:
1.1 djm 741: int
1.23 djm 742: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
743: int pflag)
1.1 djm 744: {
1.21 djm 745: Attrib junk, *a;
746: Buffer msg;
1.1 djm 747: char *handle;
1.57 dtucker 748: int local_fd, status = 0, write_error;
1.21 djm 749: int read_error, write_errno;
750: u_int64_t offset, size;
1.55 djm 751: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 752: off_t progress_counter;
1.21 djm 753: struct request {
754: u_int id;
755: u_int len;
756: u_int64_t offset;
1.28 markus 757: TAILQ_ENTRY(request) tq;
1.21 djm 758: };
759: TAILQ_HEAD(reqhead, request) requests;
760: struct request *req;
761:
762: TAILQ_INIT(&requests);
1.1 djm 763:
1.23 djm 764: a = do_stat(conn, remote_path, 0);
1.1 djm 765: if (a == NULL)
766: return(-1);
767:
768: /* XXX: should we preserve set[ug]id? */
769: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 770: mode = a->perm & 0777;
1.1 djm 771: else
772: mode = 0666;
773:
1.14 djm 774: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 775: (!S_ISREG(a->perm))) {
776: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 777: return(-1);
778: }
779:
1.21 djm 780: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
781: size = a->size;
782: else
783: size = 0;
784:
1.23 djm 785: buflen = conn->transfer_buflen;
1.1 djm 786: buffer_init(&msg);
787:
788: /* Send open request */
1.23 djm 789: id = conn->msg_id++;
1.1 djm 790: buffer_put_char(&msg, SSH2_FXP_OPEN);
791: buffer_put_int(&msg, id);
792: buffer_put_cstring(&msg, remote_path);
793: buffer_put_int(&msg, SSH2_FXF_READ);
794: attrib_clear(&junk); /* Send empty attributes */
795: encode_attrib(&msg, &junk);
1.23 djm 796: send_msg(conn->fd_out, &msg);
1.33 deraadt 797: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 798:
1.23 djm 799: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 800: if (handle == NULL) {
801: buffer_free(&msg);
802: return(-1);
803: }
804:
1.45 djm 805: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 806: mode | S_IWRITE);
1.23 djm 807: if (local_fd == -1) {
808: error("Couldn't open local file \"%s\" for writing: %s",
809: local_path, strerror(errno));
1.24 markus 810: buffer_free(&msg);
811: xfree(handle);
1.23 djm 812: return(-1);
813: }
814:
1.1 djm 815: /* Read from remote and write to local */
1.21 djm 816: write_error = read_error = write_errno = num_req = offset = 0;
817: max_req = 1;
1.39 fgsch 818: progress_counter = 0;
819:
1.47 djm 820: if (showprogress && size != 0)
821: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 822:
1.21 djm 823: while (num_req > 0 || max_req > 0) {
824: char *data;
1.1 djm 825: u_int len;
826:
1.49 djm 827: /*
1.51 deraadt 828: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 829: * allow outstanding requests to drain gracefully
830: */
831: if (interrupted) {
832: if (num_req == 0) /* If we haven't started yet... */
833: break;
834: max_req = 0;
835: }
836:
1.21 djm 837: /* Send some more requests */
838: while (num_req < max_req) {
1.28 markus 839: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 840: (unsigned long long)offset,
841: (unsigned long long)offset + buflen - 1,
842: num_req, max_req);
1.21 djm 843: req = xmalloc(sizeof(*req));
1.23 djm 844: req->id = conn->msg_id++;
1.21 djm 845: req->len = buflen;
846: req->offset = offset;
847: offset += buflen;
848: num_req++;
849: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 850: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 851: req->len, handle, handle_len);
852: }
1.1 djm 853:
854: buffer_clear(&msg);
1.23 djm 855: get_msg(conn->fd_in, &msg);
1.1 djm 856: type = buffer_get_char(&msg);
857: id = buffer_get_int(&msg);
1.33 deraadt 858: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 859:
860: /* Find the request in our queue */
1.53 deraadt 861: for (req = TAILQ_FIRST(&requests);
1.21 djm 862: req != NULL && req->id != id;
863: req = TAILQ_NEXT(req, tq))
864: ;
865: if (req == NULL)
866: fatal("Unexpected reply %u", id);
867:
868: switch (type) {
869: case SSH2_FXP_STATUS:
1.5 djm 870: status = buffer_get_int(&msg);
1.21 djm 871: if (status != SSH2_FX_EOF)
872: read_error = 1;
873: max_req = 0;
874: TAILQ_REMOVE(&requests, req, tq);
875: xfree(req);
876: num_req--;
877: break;
878: case SSH2_FXP_DATA:
879: data = buffer_get_string(&msg, &len);
1.26 itojun 880: debug3("Received data %llu -> %llu",
1.28 markus 881: (unsigned long long)req->offset,
1.26 itojun 882: (unsigned long long)req->offset + len - 1);
1.21 djm 883: if (len > req->len)
884: fatal("Received more data than asked for "
1.37 deraadt 885: "%u > %u", len, req->len);
1.21 djm 886: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 887: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 888: !write_error) {
889: write_errno = errno;
890: write_error = 1;
891: max_req = 0;
892: }
1.39 fgsch 893: progress_counter += len;
1.21 djm 894: xfree(data);
1.1 djm 895:
1.21 djm 896: if (len == req->len) {
897: TAILQ_REMOVE(&requests, req, tq);
898: xfree(req);
899: num_req--;
900: } else {
901: /* Resend the request for the missing data */
902: debug3("Short data block, re-requesting "
1.26 itojun 903: "%llu -> %llu (%2d)",
1.28 markus 904: (unsigned long long)req->offset + len,
1.27 itojun 905: (unsigned long long)req->offset +
906: req->len - 1, num_req);
1.23 djm 907: req->id = conn->msg_id++;
1.21 djm 908: req->len -= len;
909: req->offset += len;
1.28 markus 910: send_read_request(conn->fd_out, req->id,
1.23 djm 911: req->offset, req->len, handle, handle_len);
1.21 djm 912: /* Reduce the request size */
913: if (len < buflen)
914: buflen = MAX(MIN_READ_SIZE, len);
915: }
916: if (max_req > 0) { /* max_req = 0 iff EOF received */
917: if (size > 0 && offset > size) {
918: /* Only one request at a time
919: * after the expected EOF */
920: debug3("Finish at %llu (%2d)",
1.26 itojun 921: (unsigned long long)offset,
922: num_req);
1.21 djm 923: max_req = 1;
1.49 djm 924: } else if (max_req <= conn->num_requests) {
1.21 djm 925: ++max_req;
926: }
1.1 djm 927: }
1.21 djm 928: break;
929: default:
1.33 deraadt 930: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 931: SSH2_FXP_DATA, type);
932: }
1.21 djm 933: }
1.1 djm 934:
1.39 fgsch 935: if (showprogress && size)
936: stop_progress_meter();
937:
1.21 djm 938: /* Sanity check */
939: if (TAILQ_FIRST(&requests) != NULL)
940: fatal("Transfer complete, but requests still in queue");
941:
942: if (read_error) {
1.28 markus 943: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 944: remote_path, fx2txt(status));
1.23 djm 945: do_close(conn, handle, handle_len);
1.21 djm 946: } else if (write_error) {
947: error("Couldn't write to \"%s\": %s", local_path,
948: strerror(write_errno));
949: status = -1;
1.23 djm 950: do_close(conn, handle, handle_len);
1.21 djm 951: } else {
1.23 djm 952: status = do_close(conn, handle, handle_len);
1.21 djm 953:
954: /* Override umask and utimes if asked */
955: if (pflag && fchmod(local_fd, mode) == -1)
956: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 957: strerror(errno));
1.21 djm 958: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
959: struct timeval tv[2];
960: tv[0].tv_sec = a->atime;
961: tv[1].tv_sec = a->mtime;
962: tv[0].tv_usec = tv[1].tv_usec = 0;
963: if (utimes(local_path, tv) == -1)
964: error("Can't set times on \"%s\": %s",
1.37 deraadt 965: local_path, strerror(errno));
1.1 djm 966: }
1.10 djm 967: }
1.5 djm 968: close(local_fd);
969: buffer_free(&msg);
1.1 djm 970: xfree(handle);
1.23 djm 971:
972: return(status);
1.1 djm 973: }
974:
975: int
1.23 djm 976: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
977: int pflag)
1.1 djm 978: {
1.20 djm 979: int local_fd, status;
1.22 djm 980: u_int handle_len, id, type;
1.1 djm 981: u_int64_t offset;
1.20 djm 982: char *handle, *data;
1.1 djm 983: Buffer msg;
984: struct stat sb;
985: Attrib a;
1.21 djm 986: u_int32_t startid;
987: u_int32_t ackid;
1.22 djm 988: struct outstanding_ack {
989: u_int id;
990: u_int len;
991: u_int64_t offset;
1.28 markus 992: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 993: };
994: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 995: struct outstanding_ack *ack = NULL;
1.22 djm 996:
997: TAILQ_INIT(&acks);
1.1 djm 998:
999: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1000: error("Couldn't open local file \"%s\" for reading: %s",
1001: local_path, strerror(errno));
1002: return(-1);
1003: }
1004: if (fstat(local_fd, &sb) == -1) {
1005: error("Couldn't fstat local file \"%s\": %s",
1006: local_path, strerror(errno));
1.41 djm 1007: close(local_fd);
1008: return(-1);
1009: }
1010: if (!S_ISREG(sb.st_mode)) {
1011: error("%s is not a regular file", local_path);
1.1 djm 1012: close(local_fd);
1013: return(-1);
1014: }
1015: stat_to_attrib(&sb, &a);
1016:
1017: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1018: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1019: a.perm &= 0777;
1020: if (!pflag)
1021: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1022:
1023: buffer_init(&msg);
1024:
1025: /* Send open request */
1.23 djm 1026: id = conn->msg_id++;
1.1 djm 1027: buffer_put_char(&msg, SSH2_FXP_OPEN);
1028: buffer_put_int(&msg, id);
1029: buffer_put_cstring(&msg, remote_path);
1030: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1031: encode_attrib(&msg, &a);
1.23 djm 1032: send_msg(conn->fd_out, &msg);
1.33 deraadt 1033: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1034:
1035: buffer_clear(&msg);
1036:
1.23 djm 1037: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1038: if (handle == NULL) {
1039: close(local_fd);
1040: buffer_free(&msg);
1041: return(-1);
1042: }
1043:
1.21 djm 1044: startid = ackid = id + 1;
1.23 djm 1045: data = xmalloc(conn->transfer_buflen);
1.20 djm 1046:
1.1 djm 1047: /* Read from local and write to remote */
1048: offset = 0;
1.39 fgsch 1049: if (showprogress)
1050: start_progress_meter(local_path, sb.st_size, &offset);
1051:
1.19 deraadt 1052: for (;;) {
1.1 djm 1053: int len;
1054:
1055: /*
1.51 deraadt 1056: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1057: * thus losing the last block of the file.
1.51 deraadt 1058: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1059: * server to drain.
1.1 djm 1060: */
1.49 djm 1061: if (interrupted)
1062: len = 0;
1063: else do
1.23 djm 1064: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1065: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1066:
1067: if (len == -1)
1068: fatal("Couldn't read from \"%s\": %s", local_path,
1069: strerror(errno));
1.21 djm 1070:
1071: if (len != 0) {
1.22 djm 1072: ack = xmalloc(sizeof(*ack));
1073: ack->id = ++id;
1074: ack->offset = offset;
1075: ack->len = len;
1076: TAILQ_INSERT_TAIL(&acks, ack, tq);
1077:
1.21 djm 1078: buffer_clear(&msg);
1079: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1080: buffer_put_int(&msg, ack->id);
1.21 djm 1081: buffer_put_string(&msg, handle, handle_len);
1082: buffer_put_int64(&msg, offset);
1083: buffer_put_string(&msg, data, len);
1.23 djm 1084: send_msg(conn->fd_out, &msg);
1.33 deraadt 1085: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1086: id, (unsigned long long)offset, len);
1.22 djm 1087: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1088: break;
1089:
1.22 djm 1090: if (ack == NULL)
1091: fatal("Unexpected ACK %u", id);
1092:
1.28 markus 1093: if (id == startid || len == 0 ||
1.23 djm 1094: id - ackid >= conn->num_requests) {
1.32 markus 1095: u_int r_id;
1.31 djm 1096:
1.22 djm 1097: buffer_clear(&msg);
1.23 djm 1098: get_msg(conn->fd_in, &msg);
1.22 djm 1099: type = buffer_get_char(&msg);
1.31 djm 1100: r_id = buffer_get_int(&msg);
1.22 djm 1101:
1102: if (type != SSH2_FXP_STATUS)
1103: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1104: "got %d", SSH2_FXP_STATUS, type);
1105:
1106: status = buffer_get_int(&msg);
1107: debug3("SSH2_FXP_STATUS %d", status);
1108:
1109: /* Find the request in our queue */
1.53 deraadt 1110: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1111: ack != NULL && ack->id != r_id;
1.22 djm 1112: ack = TAILQ_NEXT(ack, tq))
1113: ;
1114: if (ack == NULL)
1.33 deraadt 1115: fatal("Can't find request for ID %u", r_id);
1.22 djm 1116: TAILQ_REMOVE(&acks, ack, tq);
1117:
1.21 djm 1118: if (status != SSH2_FX_OK) {
1119: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1120: remote_path, fx2txt(status));
1.23 djm 1121: do_close(conn, handle, handle_len);
1.21 djm 1122: close(local_fd);
1.42 markus 1123: xfree(data);
1124: xfree(ack);
1.21 djm 1125: goto done;
1126: }
1.33 deraadt 1127: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1128: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1129: ++ackid;
1.34 deraadt 1130: xfree(ack);
1.1 djm 1131: }
1132: offset += len;
1133: }
1.39 fgsch 1134: if (showprogress)
1135: stop_progress_meter();
1.20 djm 1136: xfree(data);
1.1 djm 1137:
1138: if (close(local_fd) == -1) {
1139: error("Couldn't close local file \"%s\": %s", local_path,
1140: strerror(errno));
1.23 djm 1141: do_close(conn, handle, handle_len);
1.5 djm 1142: status = -1;
1143: goto done;
1.1 djm 1144: }
1145:
1.10 djm 1146: /* Override umask and utimes if asked */
1147: if (pflag)
1.23 djm 1148: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1149:
1.23 djm 1150: status = do_close(conn, handle, handle_len);
1.5 djm 1151:
1152: done:
1153: xfree(handle);
1154: buffer_free(&msg);
1.23 djm 1155: return(status);
1.1 djm 1156: }
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