Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.67
1.67 ! stevesk 1: /* $OpenBSD: sftp-client.c,v 1.66 2006/07/09 15:15:11 stevesk 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:
1.67 ! stevesk 29: #include <errno.h>
1.66 stevesk 30: #include <fcntl.h>
1.1 djm 31:
32: #include "buffer.h"
33: #include "bufaux.h"
34: #include "xmalloc.h"
35: #include "log.h"
36: #include "atomicio.h"
1.39 fgsch 37: #include "progressmeter.h"
1.64 djm 38: #include "misc.h"
1.1 djm 39:
40: #include "sftp.h"
41: #include "sftp-common.h"
42: #include "sftp-client.h"
43:
1.49 djm 44: extern volatile sig_atomic_t interrupted;
1.39 fgsch 45: extern int showprogress;
46:
1.59 david 47: /* Minimum amount of data to read at a time */
1.21 djm 48: #define MIN_READ_SIZE 512
49:
1.23 djm 50: struct sftp_conn {
51: int fd_in;
52: int fd_out;
53: u_int transfer_buflen;
54: u_int num_requests;
55: u_int version;
56: u_int msg_id;
57: };
1.4 djm 58:
1.17 itojun 59: static void
1.1 djm 60: send_msg(int fd, Buffer *m)
61: {
1.40 djm 62: u_char mlen[4];
1.65 djm 63: struct iovec iov[2];
1.40 djm 64:
1.58 djm 65: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 66: fatal("Outbound message too long %u", buffer_len(m));
67:
68: /* Send length first */
1.64 djm 69: put_u32(mlen, buffer_len(m));
1.65 djm 70: iov[0].iov_base = mlen;
71: iov[0].iov_len = sizeof(mlen);
72: iov[1].iov_base = buffer_ptr(m);
73: iov[1].iov_len = buffer_len(m);
74:
75: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 76: fatal("Couldn't send packet: %s", strerror(errno));
77:
1.40 djm 78: buffer_clear(m);
1.1 djm 79: }
80:
1.17 itojun 81: static void
1.1 djm 82: get_msg(int fd, Buffer *m)
83: {
1.40 djm 84: u_int msg_len;
1.1 djm 85:
1.40 djm 86: buffer_append_space(m, 4);
1.54 avsm 87: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
88: if (errno == EPIPE)
89: fatal("Connection closed");
90: else
91: fatal("Couldn't read packet: %s", strerror(errno));
92: }
1.1 djm 93:
1.40 djm 94: msg_len = buffer_get_int(m);
1.58 djm 95: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 96: fatal("Received message too long %u", msg_len);
1.1 djm 97:
1.40 djm 98: buffer_append_space(m, msg_len);
1.54 avsm 99: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
100: if (errno == EPIPE)
101: fatal("Connection closed");
102: else
103: fatal("Read packet: %s", strerror(errno));
104: }
1.1 djm 105: }
106:
1.17 itojun 107: static void
1.1 djm 108: send_string_request(int fd, u_int id, u_int code, char *s,
109: u_int len)
110: {
111: Buffer msg;
112:
113: buffer_init(&msg);
114: buffer_put_char(&msg, code);
115: buffer_put_int(&msg, id);
116: buffer_put_string(&msg, s, len);
117: send_msg(fd, &msg);
1.33 deraadt 118: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 119: buffer_free(&msg);
120: }
121:
1.17 itojun 122: static void
1.1 djm 123: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
124: u_int len, Attrib *a)
125: {
126: Buffer msg;
127:
128: buffer_init(&msg);
129: buffer_put_char(&msg, code);
130: buffer_put_int(&msg, id);
131: buffer_put_string(&msg, s, len);
132: encode_attrib(&msg, a);
133: send_msg(fd, &msg);
1.33 deraadt 134: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 135: buffer_free(&msg);
136: }
137:
1.17 itojun 138: static u_int
1.33 deraadt 139: get_status(int fd, u_int expected_id)
1.1 djm 140: {
141: Buffer msg;
142: u_int type, id, status;
143:
144: buffer_init(&msg);
145: get_msg(fd, &msg);
146: type = buffer_get_char(&msg);
147: id = buffer_get_int(&msg);
148:
149: if (id != expected_id)
1.33 deraadt 150: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 151: if (type != SSH2_FXP_STATUS)
1.33 deraadt 152: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 153: SSH2_FXP_STATUS, type);
154:
155: status = buffer_get_int(&msg);
156: buffer_free(&msg);
157:
1.33 deraadt 158: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 159:
160: return(status);
161: }
162:
1.17 itojun 163: static char *
1.1 djm 164: get_handle(int fd, u_int expected_id, u_int *len)
165: {
166: Buffer msg;
167: u_int type, id;
168: char *handle;
169:
170: buffer_init(&msg);
171: get_msg(fd, &msg);
172: type = buffer_get_char(&msg);
173: id = buffer_get_int(&msg);
174:
175: if (id != expected_id)
1.33 deraadt 176: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 177: if (type == SSH2_FXP_STATUS) {
178: int status = buffer_get_int(&msg);
179:
180: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 181: buffer_free(&msg);
1.1 djm 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));
1.52 markus 216: buffer_free(&msg);
1.1 djm 217: return(NULL);
218: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 219: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 220: SSH2_FXP_ATTRS, type);
221: }
222: a = decode_attrib(&msg);
223: buffer_free(&msg);
224:
225: return(a);
226: }
227:
1.23 djm 228: struct sftp_conn *
229: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 230: {
1.33 deraadt 231: u_int type;
232: int version;
1.1 djm 233: Buffer msg;
1.23 djm 234: struct sftp_conn *ret;
1.1 djm 235:
236: buffer_init(&msg);
237: buffer_put_char(&msg, SSH2_FXP_INIT);
238: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
239: send_msg(fd_out, &msg);
240:
241: buffer_clear(&msg);
242:
243: get_msg(fd_in, &msg);
244:
1.3 stevesk 245: /* Expecting a VERSION reply */
1.1 djm 246: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 247: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 248: type);
249: buffer_free(&msg);
1.23 djm 250: return(NULL);
1.1 djm 251: }
252: version = buffer_get_int(&msg);
253:
254: debug2("Remote version: %d", version);
255:
256: /* Check for extensions */
257: while (buffer_len(&msg) > 0) {
258: char *name = buffer_get_string(&msg, NULL);
259: char *value = buffer_get_string(&msg, NULL);
260:
261: debug2("Init extension: \"%s\"", name);
262: xfree(name);
263: xfree(value);
264: }
265:
266: buffer_free(&msg);
1.11 djm 267:
1.23 djm 268: ret = xmalloc(sizeof(*ret));
269: ret->fd_in = fd_in;
270: ret->fd_out = fd_out;
271: ret->transfer_buflen = transfer_buflen;
272: ret->num_requests = num_requests;
273: ret->version = version;
274: ret->msg_id = 1;
275:
276: /* Some filexfer v.0 servers don't support large packets */
277: if (version == 0)
1.29 markus 278: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 279:
280: return(ret);
281: }
282:
283: u_int
284: sftp_proto_version(struct sftp_conn *conn)
285: {
286: return(conn->version);
1.1 djm 287: }
288:
289: int
1.23 djm 290: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 291: {
292: u_int id, status;
293: Buffer msg;
294:
295: buffer_init(&msg);
296:
1.23 djm 297: id = conn->msg_id++;
1.1 djm 298: buffer_put_char(&msg, SSH2_FXP_CLOSE);
299: buffer_put_int(&msg, id);
300: buffer_put_string(&msg, handle, handle_len);
1.23 djm 301: send_msg(conn->fd_out, &msg);
1.33 deraadt 302: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 303:
1.23 djm 304: status = get_status(conn->fd_in, id);
1.1 djm 305: if (status != SSH2_FX_OK)
306: error("Couldn't close file: %s", fx2txt(status));
307:
308: buffer_free(&msg);
309:
310: return(status);
311: }
312:
1.12 djm 313:
1.17 itojun 314: static int
1.23 djm 315: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 316: SFTP_DIRENT ***dir)
1.1 djm 317: {
318: Buffer msg;
1.55 djm 319: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 320: char *handle;
321:
1.23 djm 322: id = conn->msg_id++;
1.1 djm 323:
324: buffer_init(&msg);
325: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
326: buffer_put_int(&msg, id);
327: buffer_put_cstring(&msg, path);
1.23 djm 328: send_msg(conn->fd_out, &msg);
1.1 djm 329:
330: buffer_clear(&msg);
331:
1.23 djm 332: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 333: if (handle == NULL)
334: return(-1);
335:
1.12 djm 336: if (dir) {
337: ents = 0;
338: *dir = xmalloc(sizeof(**dir));
339: (*dir)[0] = NULL;
340: }
341:
1.49 djm 342: for (; !interrupted;) {
1.23 djm 343: id = expected_id = conn->msg_id++;
1.1 djm 344:
1.33 deraadt 345: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 346:
347: buffer_clear(&msg);
348: buffer_put_char(&msg, SSH2_FXP_READDIR);
349: buffer_put_int(&msg, id);
350: buffer_put_string(&msg, handle, handle_len);
1.23 djm 351: send_msg(conn->fd_out, &msg);
1.1 djm 352:
353: buffer_clear(&msg);
354:
1.23 djm 355: get_msg(conn->fd_in, &msg);
1.1 djm 356:
357: type = buffer_get_char(&msg);
358: id = buffer_get_int(&msg);
359:
1.33 deraadt 360: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 361:
362: if (id != expected_id)
1.33 deraadt 363: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 364:
365: if (type == SSH2_FXP_STATUS) {
366: int status = buffer_get_int(&msg);
367:
368: debug3("Received SSH2_FXP_STATUS %d", status);
369:
370: if (status == SSH2_FX_EOF) {
371: break;
372: } else {
373: error("Couldn't read directory: %s",
374: fx2txt(status));
1.23 djm 375: do_close(conn, handle, handle_len);
1.42 markus 376: xfree(handle);
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) {
1.62 djm 399: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 400: (*dir)[ents] = xmalloc(sizeof(***dir));
401: (*dir)[ents]->filename = xstrdup(filename);
402: (*dir)[ents]->longname = xstrdup(longname);
403: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
404: (*dir)[++ents] = NULL;
405: }
1.1 djm 406:
407: xfree(filename);
408: xfree(longname);
409: }
410: }
411:
412: buffer_free(&msg);
1.23 djm 413: do_close(conn, handle, handle_len);
1.1 djm 414: xfree(handle);
415:
1.49 djm 416: /* Don't return partial matches on interrupt */
417: if (interrupted && dir != NULL && *dir != NULL) {
418: free_sftp_dirents(*dir);
419: *dir = xmalloc(sizeof(**dir));
420: **dir = NULL;
421: }
422:
1.1 djm 423: return(0);
1.12 djm 424: }
425:
426: int
1.23 djm 427: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 428: {
1.23 djm 429: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 430: }
431:
432: void free_sftp_dirents(SFTP_DIRENT **s)
433: {
434: int i;
1.19 deraadt 435:
436: for (i = 0; s[i]; i++) {
1.12 djm 437: xfree(s[i]->filename);
438: xfree(s[i]->longname);
439: xfree(s[i]);
440: }
441: xfree(s);
442: }
443:
444: int
1.23 djm 445: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 446: {
447: u_int status, id;
448:
449: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
450:
1.23 djm 451: id = conn->msg_id++;
1.28 markus 452: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 453: strlen(path));
454: status = get_status(conn->fd_in, id);
1.1 djm 455: if (status != SSH2_FX_OK)
456: error("Couldn't delete file: %s", fx2txt(status));
457: return(status);
458: }
459:
460: int
1.23 djm 461: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 462: {
463: u_int status, id;
464:
1.23 djm 465: id = conn->msg_id++;
466: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 467: strlen(path), a);
468:
1.23 djm 469: status = get_status(conn->fd_in, id);
1.1 djm 470: if (status != SSH2_FX_OK)
471: error("Couldn't create directory: %s", fx2txt(status));
472:
473: return(status);
474: }
475:
476: int
1.23 djm 477: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 478: {
479: u_int status, id;
480:
1.23 djm 481: id = conn->msg_id++;
482: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
483: strlen(path));
1.1 djm 484:
1.23 djm 485: status = get_status(conn->fd_in, id);
1.1 djm 486: if (status != SSH2_FX_OK)
487: error("Couldn't remove directory: %s", fx2txt(status));
488:
489: return(status);
490: }
491:
492: Attrib *
1.23 djm 493: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 494: {
495: u_int id;
496:
1.23 djm 497: id = conn->msg_id++;
498:
1.28 markus 499: send_string_request(conn->fd_out, id,
500: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 501: path, strlen(path));
502:
503: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 504: }
505:
506: Attrib *
1.23 djm 507: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 508: {
509: u_int id;
510:
1.23 djm 511: if (conn->version == 0) {
512: if (quiet)
513: debug("Server version does not support lstat operation");
514: else
1.43 itojun 515: logit("Server version does not support lstat operation");
1.30 markus 516: return(do_stat(conn, path, quiet));
1.23 djm 517: }
518:
519: id = conn->msg_id++;
520: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
521: strlen(path));
522:
523: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 524: }
525:
526: Attrib *
1.23 djm 527: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 528: {
529: u_int id;
530:
1.23 djm 531: id = conn->msg_id++;
532: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
533: handle_len);
534:
535: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 536: }
537:
538: int
1.23 djm 539: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 540: {
541: u_int status, id;
542:
1.23 djm 543: id = conn->msg_id++;
544: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 545: strlen(path), a);
546:
1.23 djm 547: status = get_status(conn->fd_in, id);
1.1 djm 548: if (status != SSH2_FX_OK)
549: error("Couldn't setstat on \"%s\": %s", path,
550: fx2txt(status));
551:
552: return(status);
553: }
554:
555: int
1.23 djm 556: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 557: Attrib *a)
558: {
559: u_int status, id;
560:
1.23 djm 561: id = conn->msg_id++;
562: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 563: handle_len, a);
564:
1.23 djm 565: status = get_status(conn->fd_in, id);
1.1 djm 566: if (status != SSH2_FX_OK)
567: error("Couldn't fsetstat: %s", fx2txt(status));
568:
569: return(status);
570: }
571:
572: char *
1.23 djm 573: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 574: {
575: Buffer msg;
576: u_int type, expected_id, count, id;
577: char *filename, *longname;
578: Attrib *a;
579:
1.23 djm 580: expected_id = id = conn->msg_id++;
581: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
582: strlen(path));
1.1 djm 583:
584: buffer_init(&msg);
585:
1.23 djm 586: get_msg(conn->fd_in, &msg);
1.1 djm 587: type = buffer_get_char(&msg);
588: id = buffer_get_int(&msg);
589:
590: if (id != expected_id)
1.33 deraadt 591: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 592:
593: if (type == SSH2_FXP_STATUS) {
594: u_int status = buffer_get_int(&msg);
595:
596: error("Couldn't canonicalise: %s", fx2txt(status));
597: return(NULL);
598: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 599: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 600: SSH2_FXP_NAME, type);
601:
602: count = buffer_get_int(&msg);
603: if (count != 1)
604: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
605:
606: filename = buffer_get_string(&msg, NULL);
607: longname = buffer_get_string(&msg, NULL);
608: a = decode_attrib(&msg);
609:
610: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
611:
612: xfree(longname);
613:
614: buffer_free(&msg);
615:
616: return(filename);
617: }
618:
619: int
1.23 djm 620: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 621: {
622: Buffer msg;
623: u_int status, id;
624:
625: buffer_init(&msg);
626:
627: /* Send rename request */
1.23 djm 628: id = conn->msg_id++;
1.1 djm 629: buffer_put_char(&msg, SSH2_FXP_RENAME);
630: buffer_put_int(&msg, id);
631: buffer_put_cstring(&msg, oldpath);
632: buffer_put_cstring(&msg, newpath);
1.23 djm 633: send_msg(conn->fd_out, &msg);
1.1 djm 634: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
635: newpath);
636: buffer_free(&msg);
637:
1.23 djm 638: status = get_status(conn->fd_in, id);
1.1 djm 639: if (status != SSH2_FX_OK)
1.23 djm 640: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
641: newpath, fx2txt(status));
1.1 djm 642:
643: return(status);
1.11 djm 644: }
645:
646: int
1.23 djm 647: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 648: {
649: Buffer msg;
650: u_int status, id;
651:
1.23 djm 652: if (conn->version < 3) {
653: error("This server does not support the symlink operation");
654: return(SSH2_FX_OP_UNSUPPORTED);
655: }
656:
1.11 djm 657: buffer_init(&msg);
658:
1.48 djm 659: /* Send symlink request */
1.23 djm 660: id = conn->msg_id++;
1.11 djm 661: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
662: buffer_put_int(&msg, id);
663: buffer_put_cstring(&msg, oldpath);
664: buffer_put_cstring(&msg, newpath);
1.23 djm 665: send_msg(conn->fd_out, &msg);
1.11 djm 666: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
667: newpath);
668: buffer_free(&msg);
669:
1.23 djm 670: status = get_status(conn->fd_in, id);
1.11 djm 671: if (status != SSH2_FX_OK)
1.36 markus 672: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 673: newpath, fx2txt(status));
1.11 djm 674:
675: return(status);
676: }
677:
678: char *
1.23 djm 679: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 680: {
681: Buffer msg;
682: u_int type, expected_id, count, id;
683: char *filename, *longname;
684: Attrib *a;
685:
1.23 djm 686: expected_id = id = conn->msg_id++;
687: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
688: strlen(path));
1.11 djm 689:
690: buffer_init(&msg);
691:
1.23 djm 692: get_msg(conn->fd_in, &msg);
1.11 djm 693: type = buffer_get_char(&msg);
694: id = buffer_get_int(&msg);
695:
696: if (id != expected_id)
1.33 deraadt 697: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 698:
699: if (type == SSH2_FXP_STATUS) {
700: u_int status = buffer_get_int(&msg);
701:
702: error("Couldn't readlink: %s", fx2txt(status));
703: return(NULL);
704: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 705: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 706: SSH2_FXP_NAME, type);
707:
708: count = buffer_get_int(&msg);
709: if (count != 1)
710: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
711:
712: filename = buffer_get_string(&msg, NULL);
713: longname = buffer_get_string(&msg, NULL);
714: a = decode_attrib(&msg);
715:
716: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
717:
718: xfree(longname);
719:
720: buffer_free(&msg);
721:
722: return(filename);
1.1 djm 723: }
724:
1.21 djm 725: static void
726: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
727: char *handle, u_int handle_len)
728: {
729: Buffer msg;
1.28 markus 730:
1.21 djm 731: buffer_init(&msg);
732: buffer_clear(&msg);
733: buffer_put_char(&msg, SSH2_FXP_READ);
734: buffer_put_int(&msg, id);
735: buffer_put_string(&msg, handle, handle_len);
736: buffer_put_int64(&msg, offset);
737: buffer_put_int(&msg, len);
738: send_msg(fd_out, &msg);
739: buffer_free(&msg);
1.28 markus 740: }
1.21 djm 741:
1.1 djm 742: int
1.23 djm 743: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
744: int pflag)
1.1 djm 745: {
1.21 djm 746: Attrib junk, *a;
747: Buffer msg;
1.1 djm 748: char *handle;
1.57 dtucker 749: int local_fd, status = 0, write_error;
1.21 djm 750: int read_error, write_errno;
751: u_int64_t offset, size;
1.55 djm 752: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 753: off_t progress_counter;
1.21 djm 754: struct request {
755: u_int id;
756: u_int len;
757: u_int64_t offset;
1.28 markus 758: TAILQ_ENTRY(request) tq;
1.21 djm 759: };
760: TAILQ_HEAD(reqhead, request) requests;
761: struct request *req;
762:
763: TAILQ_INIT(&requests);
1.1 djm 764:
1.23 djm 765: a = do_stat(conn, remote_path, 0);
1.1 djm 766: if (a == NULL)
767: return(-1);
768:
769: /* XXX: should we preserve set[ug]id? */
770: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 771: mode = a->perm & 0777;
1.1 djm 772: else
773: mode = 0666;
774:
1.14 djm 775: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 776: (!S_ISREG(a->perm))) {
777: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 778: return(-1);
779: }
780:
1.21 djm 781: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
782: size = a->size;
783: else
784: size = 0;
785:
1.23 djm 786: buflen = conn->transfer_buflen;
1.1 djm 787: buffer_init(&msg);
788:
789: /* Send open request */
1.23 djm 790: id = conn->msg_id++;
1.1 djm 791: buffer_put_char(&msg, SSH2_FXP_OPEN);
792: buffer_put_int(&msg, id);
793: buffer_put_cstring(&msg, remote_path);
794: buffer_put_int(&msg, SSH2_FXF_READ);
795: attrib_clear(&junk); /* Send empty attributes */
796: encode_attrib(&msg, &junk);
1.23 djm 797: send_msg(conn->fd_out, &msg);
1.33 deraadt 798: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 799:
1.23 djm 800: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 801: if (handle == NULL) {
802: buffer_free(&msg);
803: return(-1);
804: }
805:
1.45 djm 806: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 807: mode | S_IWRITE);
1.23 djm 808: if (local_fd == -1) {
809: error("Couldn't open local file \"%s\" for writing: %s",
810: local_path, strerror(errno));
1.24 markus 811: buffer_free(&msg);
812: xfree(handle);
1.23 djm 813: return(-1);
814: }
815:
1.1 djm 816: /* Read from remote and write to local */
1.21 djm 817: write_error = read_error = write_errno = num_req = offset = 0;
818: max_req = 1;
1.39 fgsch 819: progress_counter = 0;
820:
1.47 djm 821: if (showprogress && size != 0)
822: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 823:
1.21 djm 824: while (num_req > 0 || max_req > 0) {
825: char *data;
1.1 djm 826: u_int len;
827:
1.49 djm 828: /*
1.51 deraadt 829: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 830: * allow outstanding requests to drain gracefully
831: */
832: if (interrupted) {
833: if (num_req == 0) /* If we haven't started yet... */
834: break;
835: max_req = 0;
836: }
837:
1.21 djm 838: /* Send some more requests */
839: while (num_req < max_req) {
1.28 markus 840: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 841: (unsigned long long)offset,
842: (unsigned long long)offset + buflen - 1,
843: num_req, max_req);
1.21 djm 844: req = xmalloc(sizeof(*req));
1.23 djm 845: req->id = conn->msg_id++;
1.21 djm 846: req->len = buflen;
847: req->offset = offset;
848: offset += buflen;
849: num_req++;
850: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 851: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 852: req->len, handle, handle_len);
853: }
1.1 djm 854:
855: buffer_clear(&msg);
1.23 djm 856: get_msg(conn->fd_in, &msg);
1.1 djm 857: type = buffer_get_char(&msg);
858: id = buffer_get_int(&msg);
1.33 deraadt 859: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 860:
861: /* Find the request in our queue */
1.53 deraadt 862: for (req = TAILQ_FIRST(&requests);
1.21 djm 863: req != NULL && req->id != id;
864: req = TAILQ_NEXT(req, tq))
865: ;
866: if (req == NULL)
867: fatal("Unexpected reply %u", id);
868:
869: switch (type) {
870: case SSH2_FXP_STATUS:
1.5 djm 871: status = buffer_get_int(&msg);
1.21 djm 872: if (status != SSH2_FX_EOF)
873: read_error = 1;
874: max_req = 0;
875: TAILQ_REMOVE(&requests, req, tq);
876: xfree(req);
877: num_req--;
878: break;
879: case SSH2_FXP_DATA:
880: data = buffer_get_string(&msg, &len);
1.26 itojun 881: debug3("Received data %llu -> %llu",
1.28 markus 882: (unsigned long long)req->offset,
1.26 itojun 883: (unsigned long long)req->offset + len - 1);
1.21 djm 884: if (len > req->len)
885: fatal("Received more data than asked for "
1.37 deraadt 886: "%u > %u", len, req->len);
1.21 djm 887: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 888: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 889: !write_error) {
890: write_errno = errno;
891: write_error = 1;
892: max_req = 0;
893: }
1.39 fgsch 894: progress_counter += len;
1.21 djm 895: xfree(data);
1.1 djm 896:
1.21 djm 897: if (len == req->len) {
898: TAILQ_REMOVE(&requests, req, tq);
899: xfree(req);
900: num_req--;
901: } else {
902: /* Resend the request for the missing data */
903: debug3("Short data block, re-requesting "
1.26 itojun 904: "%llu -> %llu (%2d)",
1.28 markus 905: (unsigned long long)req->offset + len,
1.27 itojun 906: (unsigned long long)req->offset +
907: req->len - 1, num_req);
1.23 djm 908: req->id = conn->msg_id++;
1.21 djm 909: req->len -= len;
910: req->offset += len;
1.28 markus 911: send_read_request(conn->fd_out, req->id,
1.23 djm 912: req->offset, req->len, handle, handle_len);
1.21 djm 913: /* Reduce the request size */
914: if (len < buflen)
915: buflen = MAX(MIN_READ_SIZE, len);
916: }
917: if (max_req > 0) { /* max_req = 0 iff EOF received */
918: if (size > 0 && offset > size) {
919: /* Only one request at a time
920: * after the expected EOF */
921: debug3("Finish at %llu (%2d)",
1.26 itojun 922: (unsigned long long)offset,
923: num_req);
1.21 djm 924: max_req = 1;
1.49 djm 925: } else if (max_req <= conn->num_requests) {
1.21 djm 926: ++max_req;
927: }
1.1 djm 928: }
1.21 djm 929: break;
930: default:
1.33 deraadt 931: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 932: SSH2_FXP_DATA, type);
933: }
1.21 djm 934: }
1.1 djm 935:
1.39 fgsch 936: if (showprogress && size)
937: stop_progress_meter();
938:
1.21 djm 939: /* Sanity check */
940: if (TAILQ_FIRST(&requests) != NULL)
941: fatal("Transfer complete, but requests still in queue");
942:
943: if (read_error) {
1.28 markus 944: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 945: remote_path, fx2txt(status));
1.23 djm 946: do_close(conn, handle, handle_len);
1.21 djm 947: } else if (write_error) {
948: error("Couldn't write to \"%s\": %s", local_path,
949: strerror(write_errno));
950: status = -1;
1.23 djm 951: do_close(conn, handle, handle_len);
1.21 djm 952: } else {
1.23 djm 953: status = do_close(conn, handle, handle_len);
1.21 djm 954:
955: /* Override umask and utimes if asked */
956: if (pflag && fchmod(local_fd, mode) == -1)
957: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 958: strerror(errno));
1.21 djm 959: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
960: struct timeval tv[2];
961: tv[0].tv_sec = a->atime;
962: tv[1].tv_sec = a->mtime;
963: tv[0].tv_usec = tv[1].tv_usec = 0;
964: if (utimes(local_path, tv) == -1)
965: error("Can't set times on \"%s\": %s",
1.37 deraadt 966: local_path, strerror(errno));
1.1 djm 967: }
1.10 djm 968: }
1.5 djm 969: close(local_fd);
970: buffer_free(&msg);
1.1 djm 971: xfree(handle);
1.23 djm 972:
973: return(status);
1.1 djm 974: }
975:
976: int
1.23 djm 977: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
978: int pflag)
1.1 djm 979: {
1.20 djm 980: int local_fd, status;
1.22 djm 981: u_int handle_len, id, type;
1.1 djm 982: u_int64_t offset;
1.20 djm 983: char *handle, *data;
1.1 djm 984: Buffer msg;
985: struct stat sb;
986: Attrib a;
1.21 djm 987: u_int32_t startid;
988: u_int32_t ackid;
1.22 djm 989: struct outstanding_ack {
990: u_int id;
991: u_int len;
992: u_int64_t offset;
1.28 markus 993: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 994: };
995: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 996: struct outstanding_ack *ack = NULL;
1.22 djm 997:
998: TAILQ_INIT(&acks);
1.1 djm 999:
1000: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1001: error("Couldn't open local file \"%s\" for reading: %s",
1002: local_path, strerror(errno));
1003: return(-1);
1004: }
1005: if (fstat(local_fd, &sb) == -1) {
1006: error("Couldn't fstat local file \"%s\": %s",
1007: local_path, strerror(errno));
1.41 djm 1008: close(local_fd);
1009: return(-1);
1010: }
1011: if (!S_ISREG(sb.st_mode)) {
1012: error("%s is not a regular file", local_path);
1.1 djm 1013: close(local_fd);
1014: return(-1);
1015: }
1016: stat_to_attrib(&sb, &a);
1017:
1018: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1019: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1020: a.perm &= 0777;
1021: if (!pflag)
1022: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1023:
1024: buffer_init(&msg);
1025:
1026: /* Send open request */
1.23 djm 1027: id = conn->msg_id++;
1.1 djm 1028: buffer_put_char(&msg, SSH2_FXP_OPEN);
1029: buffer_put_int(&msg, id);
1030: buffer_put_cstring(&msg, remote_path);
1031: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1032: encode_attrib(&msg, &a);
1.23 djm 1033: send_msg(conn->fd_out, &msg);
1.33 deraadt 1034: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1035:
1036: buffer_clear(&msg);
1037:
1.23 djm 1038: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1039: if (handle == NULL) {
1040: close(local_fd);
1041: buffer_free(&msg);
1042: return(-1);
1043: }
1044:
1.21 djm 1045: startid = ackid = id + 1;
1.23 djm 1046: data = xmalloc(conn->transfer_buflen);
1.20 djm 1047:
1.1 djm 1048: /* Read from local and write to remote */
1049: offset = 0;
1.39 fgsch 1050: if (showprogress)
1051: start_progress_meter(local_path, sb.st_size, &offset);
1052:
1.19 deraadt 1053: for (;;) {
1.1 djm 1054: int len;
1055:
1056: /*
1.51 deraadt 1057: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1058: * thus losing the last block of the file.
1.51 deraadt 1059: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1060: * server to drain.
1.1 djm 1061: */
1.49 djm 1062: if (interrupted)
1063: len = 0;
1064: else do
1.23 djm 1065: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1066: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1067:
1068: if (len == -1)
1069: fatal("Couldn't read from \"%s\": %s", local_path,
1070: strerror(errno));
1.21 djm 1071:
1072: if (len != 0) {
1.22 djm 1073: ack = xmalloc(sizeof(*ack));
1074: ack->id = ++id;
1075: ack->offset = offset;
1076: ack->len = len;
1077: TAILQ_INSERT_TAIL(&acks, ack, tq);
1078:
1.21 djm 1079: buffer_clear(&msg);
1080: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1081: buffer_put_int(&msg, ack->id);
1.21 djm 1082: buffer_put_string(&msg, handle, handle_len);
1083: buffer_put_int64(&msg, offset);
1084: buffer_put_string(&msg, data, len);
1.23 djm 1085: send_msg(conn->fd_out, &msg);
1.33 deraadt 1086: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1087: id, (unsigned long long)offset, len);
1.22 djm 1088: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1089: break;
1090:
1.22 djm 1091: if (ack == NULL)
1092: fatal("Unexpected ACK %u", id);
1093:
1.28 markus 1094: if (id == startid || len == 0 ||
1.23 djm 1095: id - ackid >= conn->num_requests) {
1.32 markus 1096: u_int r_id;
1.31 djm 1097:
1.22 djm 1098: buffer_clear(&msg);
1.23 djm 1099: get_msg(conn->fd_in, &msg);
1.22 djm 1100: type = buffer_get_char(&msg);
1.31 djm 1101: r_id = buffer_get_int(&msg);
1.22 djm 1102:
1103: if (type != SSH2_FXP_STATUS)
1104: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1105: "got %d", SSH2_FXP_STATUS, type);
1106:
1107: status = buffer_get_int(&msg);
1108: debug3("SSH2_FXP_STATUS %d", status);
1109:
1110: /* Find the request in our queue */
1.53 deraadt 1111: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1112: ack != NULL && ack->id != r_id;
1.22 djm 1113: ack = TAILQ_NEXT(ack, tq))
1114: ;
1115: if (ack == NULL)
1.33 deraadt 1116: fatal("Can't find request for ID %u", r_id);
1.22 djm 1117: TAILQ_REMOVE(&acks, ack, tq);
1118:
1.21 djm 1119: if (status != SSH2_FX_OK) {
1120: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1121: remote_path, fx2txt(status));
1.23 djm 1122: do_close(conn, handle, handle_len);
1.21 djm 1123: close(local_fd);
1.42 markus 1124: xfree(data);
1125: xfree(ack);
1.21 djm 1126: goto done;
1127: }
1.33 deraadt 1128: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1129: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1130: ++ackid;
1.34 deraadt 1131: xfree(ack);
1.1 djm 1132: }
1133: offset += len;
1134: }
1.39 fgsch 1135: if (showprogress)
1136: stop_progress_meter();
1.20 djm 1137: xfree(data);
1.1 djm 1138:
1139: if (close(local_fd) == -1) {
1140: error("Couldn't close local file \"%s\": %s", local_path,
1141: strerror(errno));
1.23 djm 1142: do_close(conn, handle, handle_len);
1.5 djm 1143: status = -1;
1144: goto done;
1.1 djm 1145: }
1146:
1.10 djm 1147: /* Override umask and utimes if asked */
1148: if (pflag)
1.23 djm 1149: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1150:
1.23 djm 1151: status = do_close(conn, handle, handle_len);
1.5 djm 1152:
1153: done:
1154: xfree(handle);
1155: buffer_free(&msg);
1.23 djm 1156: return(status);
1.1 djm 1157: }
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