Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.81
1.81 ! djm 1: /* $OpenBSD: sftp-client.c,v 1.80 2008/01/21 19:20:17 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:
1.74 deraadt 23: #include <sys/types.h>
1.21 djm 24: #include <sys/queue.h>
1.60 stevesk 25: #include <sys/stat.h>
1.71 stevesk 26: #include <sys/time.h>
1.72 stevesk 27: #include <sys/param.h>
1.74 deraadt 28: #include <sys/uio.h>
1.66 stevesk 29:
1.67 stevesk 30: #include <errno.h>
1.66 stevesk 31: #include <fcntl.h>
1.70 stevesk 32: #include <signal.h>
1.73 stevesk 33: #include <stdio.h>
1.69 stevesk 34: #include <string.h>
1.68 stevesk 35: #include <unistd.h>
1.74 deraadt 36: #include <stdarg.h>
1.1 djm 37:
1.74 deraadt 38: #include "xmalloc.h"
1.1 djm 39: #include "buffer.h"
40: #include "log.h"
41: #include "atomicio.h"
1.39 fgsch 42: #include "progressmeter.h"
1.64 djm 43: #include "misc.h"
1.1 djm 44:
45: #include "sftp.h"
46: #include "sftp-common.h"
47: #include "sftp-client.h"
48:
1.49 djm 49: extern volatile sig_atomic_t interrupted;
1.39 fgsch 50: extern int showprogress;
51:
1.59 david 52: /* Minimum amount of data to read at a time */
1.21 djm 53: #define MIN_READ_SIZE 512
54:
1.23 djm 55: struct sftp_conn {
56: int fd_in;
57: int fd_out;
58: u_int transfer_buflen;
59: u_int num_requests;
60: u_int version;
61: u_int msg_id;
1.81 ! djm 62: #define SFTP_EXT_POSIX_RENAME 1
! 63: u_int exts;
1.23 djm 64: };
1.4 djm 65:
1.17 itojun 66: static void
1.1 djm 67: send_msg(int fd, Buffer *m)
68: {
1.40 djm 69: u_char mlen[4];
1.65 djm 70: struct iovec iov[2];
1.40 djm 71:
1.58 djm 72: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 73: fatal("Outbound message too long %u", buffer_len(m));
74:
75: /* Send length first */
1.64 djm 76: put_u32(mlen, buffer_len(m));
1.65 djm 77: iov[0].iov_base = mlen;
78: iov[0].iov_len = sizeof(mlen);
79: iov[1].iov_base = buffer_ptr(m);
80: iov[1].iov_len = buffer_len(m);
1.74 deraadt 81:
1.65 djm 82: if (atomiciov(writev, fd, iov, 2) != buffer_len(m) + sizeof(mlen))
1.1 djm 83: fatal("Couldn't send packet: %s", strerror(errno));
84:
1.40 djm 85: buffer_clear(m);
1.1 djm 86: }
87:
1.17 itojun 88: static void
1.1 djm 89: get_msg(int fd, Buffer *m)
90: {
1.40 djm 91: u_int msg_len;
1.1 djm 92:
1.40 djm 93: buffer_append_space(m, 4);
1.54 avsm 94: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
95: if (errno == EPIPE)
96: fatal("Connection closed");
97: else
98: fatal("Couldn't read packet: %s", strerror(errno));
99: }
1.1 djm 100:
1.40 djm 101: msg_len = buffer_get_int(m);
1.58 djm 102: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 103: fatal("Received message too long %u", msg_len);
1.1 djm 104:
1.40 djm 105: buffer_append_space(m, msg_len);
1.54 avsm 106: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
107: if (errno == EPIPE)
108: fatal("Connection closed");
109: else
110: fatal("Read packet: %s", strerror(errno));
111: }
1.1 djm 112: }
113:
1.17 itojun 114: static void
1.1 djm 115: send_string_request(int fd, u_int id, u_int code, char *s,
116: u_int len)
117: {
118: Buffer msg;
119:
120: buffer_init(&msg);
121: buffer_put_char(&msg, code);
122: buffer_put_int(&msg, id);
123: buffer_put_string(&msg, s, len);
124: send_msg(fd, &msg);
1.33 deraadt 125: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 126: buffer_free(&msg);
127: }
128:
1.17 itojun 129: static void
1.1 djm 130: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
131: u_int len, Attrib *a)
132: {
133: Buffer msg;
134:
135: buffer_init(&msg);
136: buffer_put_char(&msg, code);
137: buffer_put_int(&msg, id);
138: buffer_put_string(&msg, s, len);
139: encode_attrib(&msg, a);
140: send_msg(fd, &msg);
1.33 deraadt 141: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 142: buffer_free(&msg);
143: }
144:
1.17 itojun 145: static u_int
1.33 deraadt 146: get_status(int fd, u_int expected_id)
1.1 djm 147: {
148: Buffer msg;
149: u_int type, id, status;
150:
151: buffer_init(&msg);
152: get_msg(fd, &msg);
153: type = buffer_get_char(&msg);
154: id = buffer_get_int(&msg);
155:
156: if (id != expected_id)
1.33 deraadt 157: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 158: if (type != SSH2_FXP_STATUS)
1.33 deraadt 159: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 160: SSH2_FXP_STATUS, type);
161:
162: status = buffer_get_int(&msg);
163: buffer_free(&msg);
164:
1.33 deraadt 165: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 166:
167: return(status);
168: }
169:
1.17 itojun 170: static char *
1.1 djm 171: get_handle(int fd, u_int expected_id, u_int *len)
172: {
173: Buffer msg;
174: u_int type, id;
175: char *handle;
176:
177: buffer_init(&msg);
178: get_msg(fd, &msg);
179: type = buffer_get_char(&msg);
180: id = buffer_get_int(&msg);
181:
182: if (id != expected_id)
1.33 deraadt 183: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 184: if (type == SSH2_FXP_STATUS) {
185: int status = buffer_get_int(&msg);
186:
187: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 188: buffer_free(&msg);
1.1 djm 189: return(NULL);
190: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 191: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 192: SSH2_FXP_HANDLE, type);
193:
194: handle = buffer_get_string(&msg, len);
195: buffer_free(&msg);
196:
197: return(handle);
198: }
199:
1.17 itojun 200: static Attrib *
1.14 djm 201: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 202: {
203: Buffer msg;
204: u_int type, id;
205: Attrib *a;
206:
207: buffer_init(&msg);
208: get_msg(fd, &msg);
209:
210: type = buffer_get_char(&msg);
211: id = buffer_get_int(&msg);
212:
1.33 deraadt 213: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 214: if (id != expected_id)
1.33 deraadt 215: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 216: if (type == SSH2_FXP_STATUS) {
217: int status = buffer_get_int(&msg);
218:
1.14 djm 219: if (quiet)
220: debug("Couldn't stat remote file: %s", fx2txt(status));
221: else
222: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 223: buffer_free(&msg);
1.1 djm 224: return(NULL);
225: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 226: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 227: SSH2_FXP_ATTRS, type);
228: }
229: a = decode_attrib(&msg);
230: buffer_free(&msg);
231:
232: return(a);
233: }
234:
1.23 djm 235: struct sftp_conn *
236: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 237: {
1.81 ! djm 238: u_int type, exts = 0;
1.33 deraadt 239: int version;
1.1 djm 240: Buffer msg;
1.23 djm 241: struct sftp_conn *ret;
1.1 djm 242:
243: buffer_init(&msg);
244: buffer_put_char(&msg, SSH2_FXP_INIT);
245: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
246: send_msg(fd_out, &msg);
247:
248: buffer_clear(&msg);
249:
250: get_msg(fd_in, &msg);
251:
1.3 stevesk 252: /* Expecting a VERSION reply */
1.1 djm 253: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 254: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 255: type);
256: buffer_free(&msg);
1.23 djm 257: return(NULL);
1.1 djm 258: }
259: version = buffer_get_int(&msg);
260:
261: debug2("Remote version: %d", version);
262:
263: /* Check for extensions */
264: while (buffer_len(&msg) > 0) {
265: char *name = buffer_get_string(&msg, NULL);
266: char *value = buffer_get_string(&msg, NULL);
267:
268: debug2("Init extension: \"%s\"", name);
1.81 ! djm 269: if (strcmp(name, "posix-rename@openssh.com") == 0)
! 270: exts |= SFTP_EXT_POSIX_RENAME;
1.1 djm 271: xfree(name);
272: xfree(value);
273: }
274:
275: buffer_free(&msg);
1.11 djm 276:
1.23 djm 277: ret = xmalloc(sizeof(*ret));
278: ret->fd_in = fd_in;
279: ret->fd_out = fd_out;
280: ret->transfer_buflen = transfer_buflen;
281: ret->num_requests = num_requests;
282: ret->version = version;
283: ret->msg_id = 1;
1.81 ! djm 284: ret->exts = exts;
1.23 djm 285:
286: /* Some filexfer v.0 servers don't support large packets */
287: if (version == 0)
1.29 markus 288: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 289:
290: return(ret);
291: }
292:
293: u_int
294: sftp_proto_version(struct sftp_conn *conn)
295: {
296: return(conn->version);
1.1 djm 297: }
298:
299: int
1.23 djm 300: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 301: {
302: u_int id, status;
303: Buffer msg;
304:
305: buffer_init(&msg);
306:
1.23 djm 307: id = conn->msg_id++;
1.1 djm 308: buffer_put_char(&msg, SSH2_FXP_CLOSE);
309: buffer_put_int(&msg, id);
310: buffer_put_string(&msg, handle, handle_len);
1.23 djm 311: send_msg(conn->fd_out, &msg);
1.33 deraadt 312: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 313:
1.23 djm 314: status = get_status(conn->fd_in, id);
1.1 djm 315: if (status != SSH2_FX_OK)
316: error("Couldn't close file: %s", fx2txt(status));
317:
318: buffer_free(&msg);
319:
320: return(status);
321: }
322:
1.12 djm 323:
1.17 itojun 324: static int
1.23 djm 325: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 326: SFTP_DIRENT ***dir)
1.1 djm 327: {
328: Buffer msg;
1.55 djm 329: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 330: char *handle;
331:
1.23 djm 332: id = conn->msg_id++;
1.1 djm 333:
334: buffer_init(&msg);
335: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
336: buffer_put_int(&msg, id);
337: buffer_put_cstring(&msg, path);
1.23 djm 338: send_msg(conn->fd_out, &msg);
1.1 djm 339:
340: buffer_clear(&msg);
341:
1.23 djm 342: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 343: if (handle == NULL)
344: return(-1);
345:
1.12 djm 346: if (dir) {
347: ents = 0;
348: *dir = xmalloc(sizeof(**dir));
349: (*dir)[0] = NULL;
350: }
351:
1.49 djm 352: for (; !interrupted;) {
1.23 djm 353: id = expected_id = conn->msg_id++;
1.1 djm 354:
1.33 deraadt 355: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 356:
357: buffer_clear(&msg);
358: buffer_put_char(&msg, SSH2_FXP_READDIR);
359: buffer_put_int(&msg, id);
360: buffer_put_string(&msg, handle, handle_len);
1.23 djm 361: send_msg(conn->fd_out, &msg);
1.1 djm 362:
363: buffer_clear(&msg);
364:
1.23 djm 365: get_msg(conn->fd_in, &msg);
1.1 djm 366:
367: type = buffer_get_char(&msg);
368: id = buffer_get_int(&msg);
369:
1.33 deraadt 370: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 371:
372: if (id != expected_id)
1.33 deraadt 373: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 374:
375: if (type == SSH2_FXP_STATUS) {
376: int status = buffer_get_int(&msg);
377:
378: debug3("Received SSH2_FXP_STATUS %d", status);
379:
380: if (status == SSH2_FX_EOF) {
381: break;
382: } else {
383: error("Couldn't read directory: %s",
384: fx2txt(status));
1.23 djm 385: do_close(conn, handle, handle_len);
1.42 markus 386: xfree(handle);
1.9 djm 387: return(status);
1.1 djm 388: }
389: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 390: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 391: SSH2_FXP_NAME, type);
392:
393: count = buffer_get_int(&msg);
1.7 markus 394: if (count == 0)
395: break;
1.8 stevesk 396: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 397: for (i = 0; i < count; i++) {
1.1 djm 398: char *filename, *longname;
399: Attrib *a;
400:
401: filename = buffer_get_string(&msg, NULL);
402: longname = buffer_get_string(&msg, NULL);
403: a = decode_attrib(&msg);
404:
1.12 djm 405: if (printflag)
406: printf("%s\n", longname);
407:
408: if (dir) {
1.62 djm 409: *dir = xrealloc(*dir, ents + 2, sizeof(**dir));
1.12 djm 410: (*dir)[ents] = xmalloc(sizeof(***dir));
411: (*dir)[ents]->filename = xstrdup(filename);
412: (*dir)[ents]->longname = xstrdup(longname);
413: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
414: (*dir)[++ents] = NULL;
415: }
1.1 djm 416:
417: xfree(filename);
418: xfree(longname);
419: }
420: }
421:
422: buffer_free(&msg);
1.23 djm 423: do_close(conn, handle, handle_len);
1.1 djm 424: xfree(handle);
425:
1.49 djm 426: /* Don't return partial matches on interrupt */
427: if (interrupted && dir != NULL && *dir != NULL) {
428: free_sftp_dirents(*dir);
429: *dir = xmalloc(sizeof(**dir));
430: **dir = NULL;
431: }
432:
1.1 djm 433: return(0);
1.12 djm 434: }
435:
436: int
1.23 djm 437: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 438: {
1.23 djm 439: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 440: }
441:
442: void free_sftp_dirents(SFTP_DIRENT **s)
443: {
444: int i;
1.19 deraadt 445:
446: for (i = 0; s[i]; i++) {
1.12 djm 447: xfree(s[i]->filename);
448: xfree(s[i]->longname);
449: xfree(s[i]);
450: }
451: xfree(s);
452: }
453:
454: int
1.23 djm 455: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 456: {
457: u_int status, id;
458:
459: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
460:
1.23 djm 461: id = conn->msg_id++;
1.28 markus 462: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 463: strlen(path));
464: status = get_status(conn->fd_in, id);
1.1 djm 465: if (status != SSH2_FX_OK)
466: error("Couldn't delete file: %s", fx2txt(status));
467: return(status);
468: }
469:
470: int
1.23 djm 471: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 472: {
473: u_int status, id;
474:
1.23 djm 475: id = conn->msg_id++;
476: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 477: strlen(path), a);
478:
1.23 djm 479: status = get_status(conn->fd_in, id);
1.1 djm 480: if (status != SSH2_FX_OK)
481: error("Couldn't create directory: %s", fx2txt(status));
482:
483: return(status);
484: }
485:
486: int
1.23 djm 487: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 488: {
489: u_int status, id;
490:
1.23 djm 491: id = conn->msg_id++;
492: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
493: strlen(path));
1.1 djm 494:
1.23 djm 495: status = get_status(conn->fd_in, id);
1.1 djm 496: if (status != SSH2_FX_OK)
497: error("Couldn't remove directory: %s", fx2txt(status));
498:
499: return(status);
500: }
501:
502: Attrib *
1.23 djm 503: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 504: {
505: u_int id;
506:
1.23 djm 507: id = conn->msg_id++;
508:
1.28 markus 509: send_string_request(conn->fd_out, id,
510: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 511: path, strlen(path));
512:
513: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 514: }
515:
516: Attrib *
1.23 djm 517: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 518: {
519: u_int id;
520:
1.23 djm 521: if (conn->version == 0) {
522: if (quiet)
523: debug("Server version does not support lstat operation");
524: else
1.43 itojun 525: logit("Server version does not support lstat operation");
1.30 markus 526: return(do_stat(conn, path, quiet));
1.23 djm 527: }
528:
529: id = conn->msg_id++;
530: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
531: strlen(path));
532:
533: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 534: }
535:
1.78 chl 536: #ifdef notyet
1.1 djm 537: Attrib *
1.23 djm 538: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 539: {
540: u_int id;
541:
1.23 djm 542: id = conn->msg_id++;
543: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
544: handle_len);
545:
546: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 547: }
1.78 chl 548: #endif
1.1 djm 549:
550: int
1.23 djm 551: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 552: {
553: u_int status, id;
554:
1.23 djm 555: id = conn->msg_id++;
556: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 557: strlen(path), a);
558:
1.23 djm 559: status = get_status(conn->fd_in, id);
1.1 djm 560: if (status != SSH2_FX_OK)
561: error("Couldn't setstat on \"%s\": %s", path,
562: fx2txt(status));
563:
564: return(status);
565: }
566:
567: int
1.23 djm 568: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 569: Attrib *a)
570: {
571: u_int status, id;
572:
1.23 djm 573: id = conn->msg_id++;
574: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 575: handle_len, a);
576:
1.23 djm 577: status = get_status(conn->fd_in, id);
1.1 djm 578: if (status != SSH2_FX_OK)
579: error("Couldn't fsetstat: %s", fx2txt(status));
580:
581: return(status);
582: }
583:
584: char *
1.23 djm 585: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 586: {
587: Buffer msg;
588: u_int type, expected_id, count, id;
589: char *filename, *longname;
590: Attrib *a;
591:
1.23 djm 592: expected_id = id = conn->msg_id++;
593: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
594: strlen(path));
1.1 djm 595:
596: buffer_init(&msg);
597:
1.23 djm 598: get_msg(conn->fd_in, &msg);
1.1 djm 599: type = buffer_get_char(&msg);
600: id = buffer_get_int(&msg);
601:
602: if (id != expected_id)
1.33 deraadt 603: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 604:
605: if (type == SSH2_FXP_STATUS) {
606: u_int status = buffer_get_int(&msg);
607:
608: error("Couldn't canonicalise: %s", fx2txt(status));
609: return(NULL);
610: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 611: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 612: SSH2_FXP_NAME, type);
613:
614: count = buffer_get_int(&msg);
615: if (count != 1)
616: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
617:
618: filename = buffer_get_string(&msg, NULL);
619: longname = buffer_get_string(&msg, NULL);
620: a = decode_attrib(&msg);
621:
622: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
623:
624: xfree(longname);
625:
626: buffer_free(&msg);
627:
628: return(filename);
629: }
630:
631: int
1.23 djm 632: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 633: {
634: Buffer msg;
635: u_int status, id;
636:
637: buffer_init(&msg);
638:
639: /* Send rename request */
1.23 djm 640: id = conn->msg_id++;
1.81 ! djm 641: if ((conn->exts & SFTP_EXT_POSIX_RENAME)) {
! 642: buffer_put_char(&msg, SSH2_FXP_EXTENDED);
! 643: buffer_put_int(&msg, id);
! 644: buffer_put_cstring(&msg, "posix-rename@openssh.com");
! 645: } else {
! 646: buffer_put_char(&msg, SSH2_FXP_RENAME);
! 647: buffer_put_int(&msg, id);
! 648: }
1.1 djm 649: buffer_put_cstring(&msg, oldpath);
650: buffer_put_cstring(&msg, newpath);
1.23 djm 651: send_msg(conn->fd_out, &msg);
1.81 ! djm 652: debug3("Sent message %s \"%s\" -> \"%s\"",
! 653: (conn->exts & SFTP_EXT_POSIX_RENAME) ? "posix-rename@openssh.com" :
! 654: "SSH2_FXP_RENAME", oldpath, newpath);
1.1 djm 655: buffer_free(&msg);
656:
1.23 djm 657: status = get_status(conn->fd_in, id);
1.1 djm 658: if (status != SSH2_FX_OK)
1.23 djm 659: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
660: newpath, fx2txt(status));
1.1 djm 661:
662: return(status);
1.11 djm 663: }
664:
665: int
1.23 djm 666: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 667: {
668: Buffer msg;
669: u_int status, id;
670:
1.23 djm 671: if (conn->version < 3) {
672: error("This server does not support the symlink operation");
673: return(SSH2_FX_OP_UNSUPPORTED);
674: }
675:
1.11 djm 676: buffer_init(&msg);
677:
1.48 djm 678: /* Send symlink request */
1.23 djm 679: id = conn->msg_id++;
1.11 djm 680: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
681: buffer_put_int(&msg, id);
682: buffer_put_cstring(&msg, oldpath);
683: buffer_put_cstring(&msg, newpath);
1.23 djm 684: send_msg(conn->fd_out, &msg);
1.11 djm 685: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
686: newpath);
687: buffer_free(&msg);
688:
1.23 djm 689: status = get_status(conn->fd_in, id);
1.11 djm 690: if (status != SSH2_FX_OK)
1.36 markus 691: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 692: newpath, fx2txt(status));
1.11 djm 693:
694: return(status);
695: }
696:
1.78 chl 697: #ifdef notyet
1.11 djm 698: char *
1.23 djm 699: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 700: {
701: Buffer msg;
702: u_int type, expected_id, count, id;
703: char *filename, *longname;
704: Attrib *a;
705:
1.23 djm 706: expected_id = id = conn->msg_id++;
707: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
708: strlen(path));
1.11 djm 709:
710: buffer_init(&msg);
711:
1.23 djm 712: get_msg(conn->fd_in, &msg);
1.11 djm 713: type = buffer_get_char(&msg);
714: id = buffer_get_int(&msg);
715:
716: if (id != expected_id)
1.33 deraadt 717: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 718:
719: if (type == SSH2_FXP_STATUS) {
720: u_int status = buffer_get_int(&msg);
721:
722: error("Couldn't readlink: %s", fx2txt(status));
723: return(NULL);
724: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 725: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 726: SSH2_FXP_NAME, type);
727:
728: count = buffer_get_int(&msg);
729: if (count != 1)
730: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
731:
732: filename = buffer_get_string(&msg, NULL);
733: longname = buffer_get_string(&msg, NULL);
734: a = decode_attrib(&msg);
735:
736: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
737:
738: xfree(longname);
739:
740: buffer_free(&msg);
741:
742: return(filename);
1.1 djm 743: }
1.78 chl 744: #endif
1.1 djm 745:
1.21 djm 746: static void
747: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
748: char *handle, u_int handle_len)
749: {
750: Buffer msg;
1.28 markus 751:
1.21 djm 752: buffer_init(&msg);
753: buffer_clear(&msg);
754: buffer_put_char(&msg, SSH2_FXP_READ);
755: buffer_put_int(&msg, id);
756: buffer_put_string(&msg, handle, handle_len);
757: buffer_put_int64(&msg, offset);
758: buffer_put_int(&msg, len);
759: send_msg(fd_out, &msg);
760: buffer_free(&msg);
1.28 markus 761: }
1.21 djm 762:
1.1 djm 763: int
1.23 djm 764: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
765: int pflag)
1.1 djm 766: {
1.21 djm 767: Attrib junk, *a;
768: Buffer msg;
1.1 djm 769: char *handle;
1.57 dtucker 770: int local_fd, status = 0, write_error;
1.21 djm 771: int read_error, write_errno;
772: u_int64_t offset, size;
1.55 djm 773: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 774: off_t progress_counter;
1.21 djm 775: struct request {
776: u_int id;
777: u_int len;
778: u_int64_t offset;
1.28 markus 779: TAILQ_ENTRY(request) tq;
1.21 djm 780: };
781: TAILQ_HEAD(reqhead, request) requests;
782: struct request *req;
783:
784: TAILQ_INIT(&requests);
1.1 djm 785:
1.23 djm 786: a = do_stat(conn, remote_path, 0);
1.1 djm 787: if (a == NULL)
788: return(-1);
789:
790: /* XXX: should we preserve set[ug]id? */
791: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 792: mode = a->perm & 0777;
1.1 djm 793: else
794: mode = 0666;
795:
1.14 djm 796: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 797: (!S_ISREG(a->perm))) {
798: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 799: return(-1);
800: }
801:
1.21 djm 802: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
803: size = a->size;
804: else
805: size = 0;
806:
1.23 djm 807: buflen = conn->transfer_buflen;
1.1 djm 808: buffer_init(&msg);
809:
810: /* Send open request */
1.23 djm 811: id = conn->msg_id++;
1.1 djm 812: buffer_put_char(&msg, SSH2_FXP_OPEN);
813: buffer_put_int(&msg, id);
814: buffer_put_cstring(&msg, remote_path);
815: buffer_put_int(&msg, SSH2_FXF_READ);
816: attrib_clear(&junk); /* Send empty attributes */
817: encode_attrib(&msg, &junk);
1.23 djm 818: send_msg(conn->fd_out, &msg);
1.33 deraadt 819: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 820:
1.23 djm 821: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 822: if (handle == NULL) {
823: buffer_free(&msg);
824: return(-1);
825: }
826:
1.45 djm 827: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 828: mode | S_IWRITE);
1.23 djm 829: if (local_fd == -1) {
830: error("Couldn't open local file \"%s\" for writing: %s",
831: local_path, strerror(errno));
1.79 djm 832: do_close(conn, handle, handle_len);
1.24 markus 833: buffer_free(&msg);
834: xfree(handle);
1.23 djm 835: return(-1);
836: }
837:
1.1 djm 838: /* Read from remote and write to local */
1.21 djm 839: write_error = read_error = write_errno = num_req = offset = 0;
840: max_req = 1;
1.39 fgsch 841: progress_counter = 0;
842:
1.47 djm 843: if (showprogress && size != 0)
844: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 845:
1.21 djm 846: while (num_req > 0 || max_req > 0) {
847: char *data;
1.1 djm 848: u_int len;
849:
1.49 djm 850: /*
1.51 deraadt 851: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 852: * allow outstanding requests to drain gracefully
853: */
854: if (interrupted) {
855: if (num_req == 0) /* If we haven't started yet... */
856: break;
857: max_req = 0;
858: }
859:
1.21 djm 860: /* Send some more requests */
861: while (num_req < max_req) {
1.28 markus 862: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 863: (unsigned long long)offset,
864: (unsigned long long)offset + buflen - 1,
865: num_req, max_req);
1.21 djm 866: req = xmalloc(sizeof(*req));
1.23 djm 867: req->id = conn->msg_id++;
1.21 djm 868: req->len = buflen;
869: req->offset = offset;
870: offset += buflen;
871: num_req++;
872: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 873: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 874: req->len, handle, handle_len);
875: }
1.1 djm 876:
877: buffer_clear(&msg);
1.23 djm 878: get_msg(conn->fd_in, &msg);
1.1 djm 879: type = buffer_get_char(&msg);
880: id = buffer_get_int(&msg);
1.33 deraadt 881: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 882:
883: /* Find the request in our queue */
1.53 deraadt 884: for (req = TAILQ_FIRST(&requests);
1.21 djm 885: req != NULL && req->id != id;
886: req = TAILQ_NEXT(req, tq))
887: ;
888: if (req == NULL)
889: fatal("Unexpected reply %u", id);
890:
891: switch (type) {
892: case SSH2_FXP_STATUS:
1.5 djm 893: status = buffer_get_int(&msg);
1.21 djm 894: if (status != SSH2_FX_EOF)
895: read_error = 1;
896: max_req = 0;
897: TAILQ_REMOVE(&requests, req, tq);
898: xfree(req);
899: num_req--;
900: break;
901: case SSH2_FXP_DATA:
902: data = buffer_get_string(&msg, &len);
1.26 itojun 903: debug3("Received data %llu -> %llu",
1.28 markus 904: (unsigned long long)req->offset,
1.26 itojun 905: (unsigned long long)req->offset + len - 1);
1.21 djm 906: if (len > req->len)
907: fatal("Received more data than asked for "
1.37 deraadt 908: "%u > %u", len, req->len);
1.21 djm 909: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 910: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 911: !write_error) {
912: write_errno = errno;
913: write_error = 1;
914: max_req = 0;
915: }
1.39 fgsch 916: progress_counter += len;
1.21 djm 917: xfree(data);
1.1 djm 918:
1.21 djm 919: if (len == req->len) {
920: TAILQ_REMOVE(&requests, req, tq);
921: xfree(req);
922: num_req--;
923: } else {
924: /* Resend the request for the missing data */
925: debug3("Short data block, re-requesting "
1.26 itojun 926: "%llu -> %llu (%2d)",
1.28 markus 927: (unsigned long long)req->offset + len,
1.27 itojun 928: (unsigned long long)req->offset +
929: req->len - 1, num_req);
1.23 djm 930: req->id = conn->msg_id++;
1.21 djm 931: req->len -= len;
932: req->offset += len;
1.28 markus 933: send_read_request(conn->fd_out, req->id,
1.23 djm 934: req->offset, req->len, handle, handle_len);
1.21 djm 935: /* Reduce the request size */
936: if (len < buflen)
937: buflen = MAX(MIN_READ_SIZE, len);
938: }
939: if (max_req > 0) { /* max_req = 0 iff EOF received */
940: if (size > 0 && offset > size) {
941: /* Only one request at a time
942: * after the expected EOF */
943: debug3("Finish at %llu (%2d)",
1.26 itojun 944: (unsigned long long)offset,
945: num_req);
1.21 djm 946: max_req = 1;
1.49 djm 947: } else if (max_req <= conn->num_requests) {
1.21 djm 948: ++max_req;
949: }
1.1 djm 950: }
1.21 djm 951: break;
952: default:
1.33 deraadt 953: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 954: SSH2_FXP_DATA, type);
955: }
1.21 djm 956: }
1.1 djm 957:
1.39 fgsch 958: if (showprogress && size)
959: stop_progress_meter();
960:
1.21 djm 961: /* Sanity check */
962: if (TAILQ_FIRST(&requests) != NULL)
963: fatal("Transfer complete, but requests still in queue");
964:
965: if (read_error) {
1.28 markus 966: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 967: remote_path, fx2txt(status));
1.23 djm 968: do_close(conn, handle, handle_len);
1.21 djm 969: } else if (write_error) {
970: error("Couldn't write to \"%s\": %s", local_path,
971: strerror(write_errno));
972: status = -1;
1.23 djm 973: do_close(conn, handle, handle_len);
1.21 djm 974: } else {
1.23 djm 975: status = do_close(conn, handle, handle_len);
1.21 djm 976:
977: /* Override umask and utimes if asked */
978: if (pflag && fchmod(local_fd, mode) == -1)
979: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 980: strerror(errno));
1.21 djm 981: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
982: struct timeval tv[2];
983: tv[0].tv_sec = a->atime;
984: tv[1].tv_sec = a->mtime;
985: tv[0].tv_usec = tv[1].tv_usec = 0;
986: if (utimes(local_path, tv) == -1)
987: error("Can't set times on \"%s\": %s",
1.37 deraadt 988: local_path, strerror(errno));
1.1 djm 989: }
1.10 djm 990: }
1.5 djm 991: close(local_fd);
992: buffer_free(&msg);
1.1 djm 993: xfree(handle);
1.23 djm 994:
995: return(status);
1.1 djm 996: }
997:
998: int
1.23 djm 999: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
1000: int pflag)
1.1 djm 1001: {
1.80 djm 1002: int local_fd;
1003: int status = SSH2_FX_OK;
1.22 djm 1004: u_int handle_len, id, type;
1.77 djm 1005: off_t offset;
1.20 djm 1006: char *handle, *data;
1.1 djm 1007: Buffer msg;
1008: struct stat sb;
1009: Attrib a;
1.21 djm 1010: u_int32_t startid;
1011: u_int32_t ackid;
1.22 djm 1012: struct outstanding_ack {
1013: u_int id;
1014: u_int len;
1.77 djm 1015: off_t offset;
1.28 markus 1016: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 1017: };
1018: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 1019: struct outstanding_ack *ack = NULL;
1.22 djm 1020:
1021: TAILQ_INIT(&acks);
1.1 djm 1022:
1023: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
1024: error("Couldn't open local file \"%s\" for reading: %s",
1025: local_path, strerror(errno));
1026: return(-1);
1027: }
1028: if (fstat(local_fd, &sb) == -1) {
1029: error("Couldn't fstat local file \"%s\": %s",
1030: local_path, strerror(errno));
1.41 djm 1031: close(local_fd);
1032: return(-1);
1033: }
1034: if (!S_ISREG(sb.st_mode)) {
1035: error("%s is not a regular file", local_path);
1.1 djm 1036: close(local_fd);
1037: return(-1);
1038: }
1039: stat_to_attrib(&sb, &a);
1040:
1041: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1042: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1043: a.perm &= 0777;
1044: if (!pflag)
1045: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1046:
1047: buffer_init(&msg);
1048:
1049: /* Send open request */
1.23 djm 1050: id = conn->msg_id++;
1.1 djm 1051: buffer_put_char(&msg, SSH2_FXP_OPEN);
1052: buffer_put_int(&msg, id);
1053: buffer_put_cstring(&msg, remote_path);
1054: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1055: encode_attrib(&msg, &a);
1.23 djm 1056: send_msg(conn->fd_out, &msg);
1.33 deraadt 1057: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1058:
1059: buffer_clear(&msg);
1060:
1.23 djm 1061: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1062: if (handle == NULL) {
1063: close(local_fd);
1064: buffer_free(&msg);
1.80 djm 1065: return -1;
1.1 djm 1066: }
1067:
1.21 djm 1068: startid = ackid = id + 1;
1.23 djm 1069: data = xmalloc(conn->transfer_buflen);
1.20 djm 1070:
1.1 djm 1071: /* Read from local and write to remote */
1072: offset = 0;
1.39 fgsch 1073: if (showprogress)
1074: start_progress_meter(local_path, sb.st_size, &offset);
1075:
1.19 deraadt 1076: for (;;) {
1.1 djm 1077: int len;
1078:
1079: /*
1.51 deraadt 1080: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1081: * thus losing the last block of the file.
1.51 deraadt 1082: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1083: * server to drain.
1.1 djm 1084: */
1.80 djm 1085: if (interrupted || status != SSH2_FX_OK)
1.49 djm 1086: len = 0;
1087: else do
1.23 djm 1088: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1089: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1090:
1091: if (len == -1)
1092: fatal("Couldn't read from \"%s\": %s", local_path,
1093: strerror(errno));
1.21 djm 1094:
1095: if (len != 0) {
1.22 djm 1096: ack = xmalloc(sizeof(*ack));
1097: ack->id = ++id;
1098: ack->offset = offset;
1099: ack->len = len;
1100: TAILQ_INSERT_TAIL(&acks, ack, tq);
1101:
1.21 djm 1102: buffer_clear(&msg);
1103: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1104: buffer_put_int(&msg, ack->id);
1.21 djm 1105: buffer_put_string(&msg, handle, handle_len);
1106: buffer_put_int64(&msg, offset);
1107: buffer_put_string(&msg, data, len);
1.23 djm 1108: send_msg(conn->fd_out, &msg);
1.33 deraadt 1109: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1110: id, (unsigned long long)offset, len);
1.22 djm 1111: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1112: break;
1113:
1.22 djm 1114: if (ack == NULL)
1115: fatal("Unexpected ACK %u", id);
1116:
1.28 markus 1117: if (id == startid || len == 0 ||
1.23 djm 1118: id - ackid >= conn->num_requests) {
1.32 markus 1119: u_int r_id;
1.31 djm 1120:
1.22 djm 1121: buffer_clear(&msg);
1.23 djm 1122: get_msg(conn->fd_in, &msg);
1.22 djm 1123: type = buffer_get_char(&msg);
1.31 djm 1124: r_id = buffer_get_int(&msg);
1.22 djm 1125:
1126: if (type != SSH2_FXP_STATUS)
1127: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1128: "got %d", SSH2_FXP_STATUS, type);
1129:
1130: status = buffer_get_int(&msg);
1131: debug3("SSH2_FXP_STATUS %d", status);
1132:
1133: /* Find the request in our queue */
1.53 deraadt 1134: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1135: ack != NULL && ack->id != r_id;
1.22 djm 1136: ack = TAILQ_NEXT(ack, tq))
1137: ;
1138: if (ack == NULL)
1.33 deraadt 1139: fatal("Can't find request for ID %u", r_id);
1.22 djm 1140: TAILQ_REMOVE(&acks, ack, tq);
1.77 djm 1141: debug3("In write loop, ack for %u %u bytes at %lld",
1142: ack->id, ack->len, (long long)ack->offset);
1.21 djm 1143: ++ackid;
1.34 deraadt 1144: xfree(ack);
1.1 djm 1145: }
1146: offset += len;
1.77 djm 1147: if (offset < 0)
1148: fatal("%s: offset < 0", __func__);
1.1 djm 1149: }
1.80 djm 1150: buffer_free(&msg);
1151:
1.39 fgsch 1152: if (showprogress)
1153: stop_progress_meter();
1.20 djm 1154: xfree(data);
1.1 djm 1155:
1.80 djm 1156: if (status != SSH2_FX_OK) {
1157: error("Couldn't write to remote file \"%s\": %s",
1158: remote_path, fx2txt(status));
1159: status = -1;
1160: }
1161:
1.1 djm 1162: if (close(local_fd) == -1) {
1163: error("Couldn't close local file \"%s\": %s", local_path,
1164: strerror(errno));
1.5 djm 1165: status = -1;
1.1 djm 1166: }
1167:
1.10 djm 1168: /* Override umask and utimes if asked */
1169: if (pflag)
1.23 djm 1170: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1171:
1.80 djm 1172: if (do_close(conn, handle, handle_len) != SSH2_FX_OK)
1173: status = -1;
1174: xfree(handle);
1.5 djm 1175:
1.80 djm 1176: return status;
1.1 djm 1177: }
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