Annotation of src/usr.bin/ssh/sftp-client.c, Revision 1.61
1.1 djm 1: /*
1.46 djm 2: * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
1.1 djm 3: *
1.46 djm 4: * Permission to use, copy, modify, and distribute this software for any
5: * purpose with or without fee is hereby granted, provided that the above
6: * copyright notice and this permission notice appear in all copies.
1.1 djm 7: *
1.46 djm 8: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1 djm 15: */
16:
17: /* XXX: memleaks */
18: /* XXX: signed vs unsigned */
1.23 djm 19: /* XXX: remove all logging, only return status codes */
1.1 djm 20: /* XXX: copy between two remote sites */
21:
22: #include "includes.h"
1.21 djm 23:
24: #include <sys/queue.h>
1.60 stevesk 25: #include <sys/types.h>
26: #include <sys/stat.h>
1.1 djm 27:
28: #include "buffer.h"
29: #include "bufaux.h"
30: #include "getput.h"
31: #include "xmalloc.h"
32: #include "log.h"
33: #include "atomicio.h"
1.39 fgsch 34: #include "progressmeter.h"
1.1 djm 35:
36: #include "sftp.h"
37: #include "sftp-common.h"
38: #include "sftp-client.h"
39:
1.49 djm 40: extern volatile sig_atomic_t interrupted;
1.39 fgsch 41: extern int showprogress;
42:
1.59 david 43: /* Minimum amount of data to read at a time */
1.21 djm 44: #define MIN_READ_SIZE 512
45:
1.23 djm 46: struct sftp_conn {
47: int fd_in;
48: int fd_out;
49: u_int transfer_buflen;
50: u_int num_requests;
51: u_int version;
52: u_int msg_id;
53: };
1.4 djm 54:
1.17 itojun 55: static void
1.1 djm 56: send_msg(int fd, Buffer *m)
57: {
1.40 djm 58: u_char mlen[4];
59:
1.58 djm 60: if (buffer_len(m) > SFTP_MAX_MSG_LENGTH)
1.40 djm 61: fatal("Outbound message too long %u", buffer_len(m));
62:
63: /* Send length first */
64: PUT_32BIT(mlen, buffer_len(m));
1.54 avsm 65: if (atomicio(vwrite, fd, mlen, sizeof(mlen)) != sizeof(mlen))
1.40 djm 66: fatal("Couldn't send packet: %s", strerror(errno));
1.1 djm 67:
1.54 avsm 68: if (atomicio(vwrite, fd, buffer_ptr(m), buffer_len(m)) != buffer_len(m))
1.1 djm 69: fatal("Couldn't send packet: %s", strerror(errno));
70:
1.40 djm 71: buffer_clear(m);
1.1 djm 72: }
73:
1.17 itojun 74: static void
1.1 djm 75: get_msg(int fd, Buffer *m)
76: {
1.40 djm 77: u_int msg_len;
1.1 djm 78:
1.40 djm 79: buffer_append_space(m, 4);
1.54 avsm 80: if (atomicio(read, fd, buffer_ptr(m), 4) != 4) {
81: if (errno == EPIPE)
82: fatal("Connection closed");
83: else
84: fatal("Couldn't read packet: %s", strerror(errno));
85: }
1.1 djm 86:
1.40 djm 87: msg_len = buffer_get_int(m);
1.58 djm 88: if (msg_len > SFTP_MAX_MSG_LENGTH)
1.33 deraadt 89: fatal("Received message too long %u", msg_len);
1.1 djm 90:
1.40 djm 91: buffer_append_space(m, msg_len);
1.54 avsm 92: if (atomicio(read, fd, buffer_ptr(m), msg_len) != msg_len) {
93: if (errno == EPIPE)
94: fatal("Connection closed");
95: else
96: fatal("Read packet: %s", strerror(errno));
97: }
1.1 djm 98: }
99:
1.17 itojun 100: static void
1.1 djm 101: send_string_request(int fd, u_int id, u_int code, char *s,
102: u_int len)
103: {
104: Buffer msg;
105:
106: buffer_init(&msg);
107: buffer_put_char(&msg, code);
108: buffer_put_int(&msg, id);
109: buffer_put_string(&msg, s, len);
110: send_msg(fd, &msg);
1.33 deraadt 111: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 112: buffer_free(&msg);
113: }
114:
1.17 itojun 115: static void
1.1 djm 116: send_string_attrs_request(int fd, u_int id, u_int code, char *s,
117: u_int len, Attrib *a)
118: {
119: Buffer msg;
120:
121: buffer_init(&msg);
122: buffer_put_char(&msg, code);
123: buffer_put_int(&msg, id);
124: buffer_put_string(&msg, s, len);
125: encode_attrib(&msg, a);
126: send_msg(fd, &msg);
1.33 deraadt 127: debug3("Sent message fd %d T:%u I:%u", fd, code, id);
1.1 djm 128: buffer_free(&msg);
129: }
130:
1.17 itojun 131: static u_int
1.33 deraadt 132: get_status(int fd, u_int expected_id)
1.1 djm 133: {
134: Buffer msg;
135: u_int type, id, status;
136:
137: buffer_init(&msg);
138: get_msg(fd, &msg);
139: type = buffer_get_char(&msg);
140: id = buffer_get_int(&msg);
141:
142: if (id != expected_id)
1.33 deraadt 143: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 144: if (type != SSH2_FXP_STATUS)
1.33 deraadt 145: fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
1.1 djm 146: SSH2_FXP_STATUS, type);
147:
148: status = buffer_get_int(&msg);
149: buffer_free(&msg);
150:
1.33 deraadt 151: debug3("SSH2_FXP_STATUS %u", status);
1.1 djm 152:
153: return(status);
154: }
155:
1.17 itojun 156: static char *
1.1 djm 157: get_handle(int fd, u_int expected_id, u_int *len)
158: {
159: Buffer msg;
160: u_int type, id;
161: char *handle;
162:
163: buffer_init(&msg);
164: get_msg(fd, &msg);
165: type = buffer_get_char(&msg);
166: id = buffer_get_int(&msg);
167:
168: if (id != expected_id)
1.33 deraadt 169: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 170: if (type == SSH2_FXP_STATUS) {
171: int status = buffer_get_int(&msg);
172:
173: error("Couldn't get handle: %s", fx2txt(status));
1.52 markus 174: buffer_free(&msg);
1.1 djm 175: return(NULL);
176: } else if (type != SSH2_FXP_HANDLE)
1.33 deraadt 177: fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
1.1 djm 178: SSH2_FXP_HANDLE, type);
179:
180: handle = buffer_get_string(&msg, len);
181: buffer_free(&msg);
182:
183: return(handle);
184: }
185:
1.17 itojun 186: static Attrib *
1.14 djm 187: get_decode_stat(int fd, u_int expected_id, int quiet)
1.1 djm 188: {
189: Buffer msg;
190: u_int type, id;
191: Attrib *a;
192:
193: buffer_init(&msg);
194: get_msg(fd, &msg);
195:
196: type = buffer_get_char(&msg);
197: id = buffer_get_int(&msg);
198:
1.33 deraadt 199: debug3("Received stat reply T:%u I:%u", type, id);
1.1 djm 200: if (id != expected_id)
1.33 deraadt 201: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 202: if (type == SSH2_FXP_STATUS) {
203: int status = buffer_get_int(&msg);
204:
1.14 djm 205: if (quiet)
206: debug("Couldn't stat remote file: %s", fx2txt(status));
207: else
208: error("Couldn't stat remote file: %s", fx2txt(status));
1.52 markus 209: buffer_free(&msg);
1.1 djm 210: return(NULL);
211: } else if (type != SSH2_FXP_ATTRS) {
1.33 deraadt 212: fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
1.1 djm 213: SSH2_FXP_ATTRS, type);
214: }
215: a = decode_attrib(&msg);
216: buffer_free(&msg);
217:
218: return(a);
219: }
220:
1.23 djm 221: struct sftp_conn *
222: do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
1.1 djm 223: {
1.33 deraadt 224: u_int type;
225: int version;
1.1 djm 226: Buffer msg;
1.23 djm 227: struct sftp_conn *ret;
1.1 djm 228:
229: buffer_init(&msg);
230: buffer_put_char(&msg, SSH2_FXP_INIT);
231: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
232: send_msg(fd_out, &msg);
233:
234: buffer_clear(&msg);
235:
236: get_msg(fd_in, &msg);
237:
1.3 stevesk 238: /* Expecting a VERSION reply */
1.1 djm 239: if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
1.33 deraadt 240: error("Invalid packet back from SSH2_FXP_INIT (type %u)",
1.1 djm 241: type);
242: buffer_free(&msg);
1.23 djm 243: return(NULL);
1.1 djm 244: }
245: version = buffer_get_int(&msg);
246:
247: debug2("Remote version: %d", version);
248:
249: /* Check for extensions */
250: while (buffer_len(&msg) > 0) {
251: char *name = buffer_get_string(&msg, NULL);
252: char *value = buffer_get_string(&msg, NULL);
253:
254: debug2("Init extension: \"%s\"", name);
255: xfree(name);
256: xfree(value);
257: }
258:
259: buffer_free(&msg);
1.11 djm 260:
1.23 djm 261: ret = xmalloc(sizeof(*ret));
262: ret->fd_in = fd_in;
263: ret->fd_out = fd_out;
264: ret->transfer_buflen = transfer_buflen;
265: ret->num_requests = num_requests;
266: ret->version = version;
267: ret->msg_id = 1;
268:
269: /* Some filexfer v.0 servers don't support large packets */
270: if (version == 0)
1.29 markus 271: ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
1.23 djm 272:
273: return(ret);
274: }
275:
276: u_int
277: sftp_proto_version(struct sftp_conn *conn)
278: {
279: return(conn->version);
1.1 djm 280: }
281:
282: int
1.23 djm 283: do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
1.1 djm 284: {
285: u_int id, status;
286: Buffer msg;
287:
288: buffer_init(&msg);
289:
1.23 djm 290: id = conn->msg_id++;
1.1 djm 291: buffer_put_char(&msg, SSH2_FXP_CLOSE);
292: buffer_put_int(&msg, id);
293: buffer_put_string(&msg, handle, handle_len);
1.23 djm 294: send_msg(conn->fd_out, &msg);
1.33 deraadt 295: debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
1.1 djm 296:
1.23 djm 297: status = get_status(conn->fd_in, id);
1.1 djm 298: if (status != SSH2_FX_OK)
299: error("Couldn't close file: %s", fx2txt(status));
300:
301: buffer_free(&msg);
302:
303: return(status);
304: }
305:
1.12 djm 306:
1.17 itojun 307: static int
1.23 djm 308: do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
1.12 djm 309: SFTP_DIRENT ***dir)
1.1 djm 310: {
311: Buffer msg;
1.55 djm 312: u_int count, type, id, handle_len, i, expected_id, ents = 0;
1.1 djm 313: char *handle;
314:
1.23 djm 315: id = conn->msg_id++;
1.1 djm 316:
317: buffer_init(&msg);
318: buffer_put_char(&msg, SSH2_FXP_OPENDIR);
319: buffer_put_int(&msg, id);
320: buffer_put_cstring(&msg, path);
1.23 djm 321: send_msg(conn->fd_out, &msg);
1.1 djm 322:
323: buffer_clear(&msg);
324:
1.23 djm 325: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 326: if (handle == NULL)
327: return(-1);
328:
1.12 djm 329: if (dir) {
330: ents = 0;
331: *dir = xmalloc(sizeof(**dir));
332: (*dir)[0] = NULL;
333: }
334:
1.49 djm 335: for (; !interrupted;) {
1.23 djm 336: id = expected_id = conn->msg_id++;
1.1 djm 337:
1.33 deraadt 338: debug3("Sending SSH2_FXP_READDIR I:%u", id);
1.1 djm 339:
340: buffer_clear(&msg);
341: buffer_put_char(&msg, SSH2_FXP_READDIR);
342: buffer_put_int(&msg, id);
343: buffer_put_string(&msg, handle, handle_len);
1.23 djm 344: send_msg(conn->fd_out, &msg);
1.1 djm 345:
346: buffer_clear(&msg);
347:
1.23 djm 348: get_msg(conn->fd_in, &msg);
1.1 djm 349:
350: type = buffer_get_char(&msg);
351: id = buffer_get_int(&msg);
352:
1.33 deraadt 353: debug3("Received reply T:%u I:%u", type, id);
1.1 djm 354:
355: if (id != expected_id)
1.33 deraadt 356: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 357:
358: if (type == SSH2_FXP_STATUS) {
359: int status = buffer_get_int(&msg);
360:
361: debug3("Received SSH2_FXP_STATUS %d", status);
362:
363: if (status == SSH2_FX_EOF) {
364: break;
365: } else {
366: error("Couldn't read directory: %s",
367: fx2txt(status));
1.23 djm 368: do_close(conn, handle, handle_len);
1.42 markus 369: xfree(handle);
1.9 djm 370: return(status);
1.1 djm 371: }
372: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 373: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 374: SSH2_FXP_NAME, type);
375:
376: count = buffer_get_int(&msg);
1.7 markus 377: if (count == 0)
378: break;
1.8 stevesk 379: debug3("Received %d SSH2_FXP_NAME responses", count);
1.19 deraadt 380: for (i = 0; i < count; i++) {
1.1 djm 381: char *filename, *longname;
382: Attrib *a;
383:
384: filename = buffer_get_string(&msg, NULL);
385: longname = buffer_get_string(&msg, NULL);
386: a = decode_attrib(&msg);
387:
1.12 djm 388: if (printflag)
389: printf("%s\n", longname);
390:
391: if (dir) {
1.16 markus 392: *dir = xrealloc(*dir, sizeof(**dir) *
1.12 djm 393: (ents + 2));
394: (*dir)[ents] = xmalloc(sizeof(***dir));
395: (*dir)[ents]->filename = xstrdup(filename);
396: (*dir)[ents]->longname = xstrdup(longname);
397: memcpy(&(*dir)[ents]->a, a, sizeof(*a));
398: (*dir)[++ents] = NULL;
399: }
1.1 djm 400:
401: xfree(filename);
402: xfree(longname);
403: }
404: }
405:
406: buffer_free(&msg);
1.23 djm 407: do_close(conn, handle, handle_len);
1.1 djm 408: xfree(handle);
409:
1.49 djm 410: /* Don't return partial matches on interrupt */
411: if (interrupted && dir != NULL && *dir != NULL) {
412: free_sftp_dirents(*dir);
413: *dir = xmalloc(sizeof(**dir));
414: **dir = NULL;
415: }
416:
1.1 djm 417: return(0);
1.12 djm 418: }
419:
420: int
1.23 djm 421: do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
1.12 djm 422: {
1.23 djm 423: return(do_lsreaddir(conn, path, 0, dir));
1.12 djm 424: }
425:
426: void free_sftp_dirents(SFTP_DIRENT **s)
427: {
428: int i;
1.19 deraadt 429:
430: for (i = 0; s[i]; i++) {
1.12 djm 431: xfree(s[i]->filename);
432: xfree(s[i]->longname);
433: xfree(s[i]);
434: }
435: xfree(s);
436: }
437:
438: int
1.23 djm 439: do_rm(struct sftp_conn *conn, char *path)
1.1 djm 440: {
441: u_int status, id;
442:
443: debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
444:
1.23 djm 445: id = conn->msg_id++;
1.28 markus 446: send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
1.23 djm 447: strlen(path));
448: status = get_status(conn->fd_in, id);
1.1 djm 449: if (status != SSH2_FX_OK)
450: error("Couldn't delete file: %s", fx2txt(status));
451: return(status);
452: }
453:
454: int
1.23 djm 455: do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 456: {
457: u_int status, id;
458:
1.23 djm 459: id = conn->msg_id++;
460: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
1.1 djm 461: strlen(path), a);
462:
1.23 djm 463: status = get_status(conn->fd_in, id);
1.1 djm 464: if (status != SSH2_FX_OK)
465: error("Couldn't create directory: %s", fx2txt(status));
466:
467: return(status);
468: }
469:
470: int
1.23 djm 471: do_rmdir(struct sftp_conn *conn, char *path)
1.1 djm 472: {
473: u_int status, id;
474:
1.23 djm 475: id = conn->msg_id++;
476: send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
477: strlen(path));
1.1 djm 478:
1.23 djm 479: status = get_status(conn->fd_in, id);
1.1 djm 480: if (status != SSH2_FX_OK)
481: error("Couldn't remove directory: %s", fx2txt(status));
482:
483: return(status);
484: }
485:
486: Attrib *
1.23 djm 487: do_stat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 488: {
489: u_int id;
490:
1.23 djm 491: id = conn->msg_id++;
492:
1.28 markus 493: send_string_request(conn->fd_out, id,
494: conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
1.23 djm 495: path, strlen(path));
496:
497: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 498: }
499:
500: Attrib *
1.23 djm 501: do_lstat(struct sftp_conn *conn, char *path, int quiet)
1.1 djm 502: {
503: u_int id;
504:
1.23 djm 505: if (conn->version == 0) {
506: if (quiet)
507: debug("Server version does not support lstat operation");
508: else
1.43 itojun 509: logit("Server version does not support lstat operation");
1.30 markus 510: return(do_stat(conn, path, quiet));
1.23 djm 511: }
512:
513: id = conn->msg_id++;
514: send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
515: strlen(path));
516:
517: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 518: }
519:
520: Attrib *
1.23 djm 521: do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
1.1 djm 522: {
523: u_int id;
524:
1.23 djm 525: id = conn->msg_id++;
526: send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
527: handle_len);
528:
529: return(get_decode_stat(conn->fd_in, id, quiet));
1.1 djm 530: }
531:
532: int
1.23 djm 533: do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
1.1 djm 534: {
535: u_int status, id;
536:
1.23 djm 537: id = conn->msg_id++;
538: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
1.1 djm 539: strlen(path), a);
540:
1.23 djm 541: status = get_status(conn->fd_in, id);
1.1 djm 542: if (status != SSH2_FX_OK)
543: error("Couldn't setstat on \"%s\": %s", path,
544: fx2txt(status));
545:
546: return(status);
547: }
548:
549: int
1.23 djm 550: do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
1.1 djm 551: Attrib *a)
552: {
553: u_int status, id;
554:
1.23 djm 555: id = conn->msg_id++;
556: send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
1.1 djm 557: handle_len, a);
558:
1.23 djm 559: status = get_status(conn->fd_in, id);
1.1 djm 560: if (status != SSH2_FX_OK)
561: error("Couldn't fsetstat: %s", fx2txt(status));
562:
563: return(status);
564: }
565:
566: char *
1.23 djm 567: do_realpath(struct sftp_conn *conn, char *path)
1.1 djm 568: {
569: Buffer msg;
570: u_int type, expected_id, count, id;
571: char *filename, *longname;
572: Attrib *a;
573:
1.23 djm 574: expected_id = id = conn->msg_id++;
575: send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
576: strlen(path));
1.1 djm 577:
578: buffer_init(&msg);
579:
1.23 djm 580: get_msg(conn->fd_in, &msg);
1.1 djm 581: type = buffer_get_char(&msg);
582: id = buffer_get_int(&msg);
583:
584: if (id != expected_id)
1.33 deraadt 585: fatal("ID mismatch (%u != %u)", id, expected_id);
1.1 djm 586:
587: if (type == SSH2_FXP_STATUS) {
588: u_int status = buffer_get_int(&msg);
589:
590: error("Couldn't canonicalise: %s", fx2txt(status));
591: return(NULL);
592: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 593: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.1 djm 594: SSH2_FXP_NAME, type);
595:
596: count = buffer_get_int(&msg);
597: if (count != 1)
598: fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
599:
600: filename = buffer_get_string(&msg, NULL);
601: longname = buffer_get_string(&msg, NULL);
602: a = decode_attrib(&msg);
603:
604: debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
605:
606: xfree(longname);
607:
608: buffer_free(&msg);
609:
610: return(filename);
611: }
612:
613: int
1.23 djm 614: do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
1.1 djm 615: {
616: Buffer msg;
617: u_int status, id;
618:
619: buffer_init(&msg);
620:
621: /* Send rename request */
1.23 djm 622: id = conn->msg_id++;
1.1 djm 623: buffer_put_char(&msg, SSH2_FXP_RENAME);
624: buffer_put_int(&msg, id);
625: buffer_put_cstring(&msg, oldpath);
626: buffer_put_cstring(&msg, newpath);
1.23 djm 627: send_msg(conn->fd_out, &msg);
1.1 djm 628: debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
629: newpath);
630: buffer_free(&msg);
631:
1.23 djm 632: status = get_status(conn->fd_in, id);
1.1 djm 633: if (status != SSH2_FX_OK)
1.23 djm 634: error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
635: newpath, fx2txt(status));
1.1 djm 636:
637: return(status);
1.11 djm 638: }
639:
640: int
1.23 djm 641: do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
1.11 djm 642: {
643: Buffer msg;
644: u_int status, id;
645:
1.23 djm 646: if (conn->version < 3) {
647: error("This server does not support the symlink operation");
648: return(SSH2_FX_OP_UNSUPPORTED);
649: }
650:
1.11 djm 651: buffer_init(&msg);
652:
1.48 djm 653: /* Send symlink request */
1.23 djm 654: id = conn->msg_id++;
1.11 djm 655: buffer_put_char(&msg, SSH2_FXP_SYMLINK);
656: buffer_put_int(&msg, id);
657: buffer_put_cstring(&msg, oldpath);
658: buffer_put_cstring(&msg, newpath);
1.23 djm 659: send_msg(conn->fd_out, &msg);
1.11 djm 660: debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
661: newpath);
662: buffer_free(&msg);
663:
1.23 djm 664: status = get_status(conn->fd_in, id);
1.11 djm 665: if (status != SSH2_FX_OK)
1.36 markus 666: error("Couldn't symlink file \"%s\" to \"%s\": %s", oldpath,
1.23 djm 667: newpath, fx2txt(status));
1.11 djm 668:
669: return(status);
670: }
671:
672: char *
1.23 djm 673: do_readlink(struct sftp_conn *conn, char *path)
1.11 djm 674: {
675: Buffer msg;
676: u_int type, expected_id, count, id;
677: char *filename, *longname;
678: Attrib *a;
679:
1.23 djm 680: expected_id = id = conn->msg_id++;
681: send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
682: strlen(path));
1.11 djm 683:
684: buffer_init(&msg);
685:
1.23 djm 686: get_msg(conn->fd_in, &msg);
1.11 djm 687: type = buffer_get_char(&msg);
688: id = buffer_get_int(&msg);
689:
690: if (id != expected_id)
1.33 deraadt 691: fatal("ID mismatch (%u != %u)", id, expected_id);
1.11 djm 692:
693: if (type == SSH2_FXP_STATUS) {
694: u_int status = buffer_get_int(&msg);
695:
696: error("Couldn't readlink: %s", fx2txt(status));
697: return(NULL);
698: } else if (type != SSH2_FXP_NAME)
1.33 deraadt 699: fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
1.11 djm 700: SSH2_FXP_NAME, type);
701:
702: count = buffer_get_int(&msg);
703: if (count != 1)
704: fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
705:
706: filename = buffer_get_string(&msg, NULL);
707: longname = buffer_get_string(&msg, NULL);
708: a = decode_attrib(&msg);
709:
710: debug3("SSH_FXP_READLINK %s -> %s", path, filename);
711:
712: xfree(longname);
713:
714: buffer_free(&msg);
715:
716: return(filename);
1.1 djm 717: }
718:
1.21 djm 719: static void
720: send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
721: char *handle, u_int handle_len)
722: {
723: Buffer msg;
1.28 markus 724:
1.21 djm 725: buffer_init(&msg);
726: buffer_clear(&msg);
727: buffer_put_char(&msg, SSH2_FXP_READ);
728: buffer_put_int(&msg, id);
729: buffer_put_string(&msg, handle, handle_len);
730: buffer_put_int64(&msg, offset);
731: buffer_put_int(&msg, len);
732: send_msg(fd_out, &msg);
733: buffer_free(&msg);
1.28 markus 734: }
1.21 djm 735:
1.1 djm 736: int
1.23 djm 737: do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
738: int pflag)
1.1 djm 739: {
1.21 djm 740: Attrib junk, *a;
741: Buffer msg;
1.1 djm 742: char *handle;
1.57 dtucker 743: int local_fd, status = 0, write_error;
1.21 djm 744: int read_error, write_errno;
745: u_int64_t offset, size;
1.55 djm 746: u_int handle_len, mode, type, id, buflen, num_req, max_req;
1.39 fgsch 747: off_t progress_counter;
1.21 djm 748: struct request {
749: u_int id;
750: u_int len;
751: u_int64_t offset;
1.28 markus 752: TAILQ_ENTRY(request) tq;
1.21 djm 753: };
754: TAILQ_HEAD(reqhead, request) requests;
755: struct request *req;
756:
757: TAILQ_INIT(&requests);
1.1 djm 758:
1.23 djm 759: a = do_stat(conn, remote_path, 0);
1.1 djm 760: if (a == NULL)
761: return(-1);
762:
763: /* XXX: should we preserve set[ug]id? */
764: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
1.38 djm 765: mode = a->perm & 0777;
1.1 djm 766: else
767: mode = 0666;
768:
1.14 djm 769: if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
1.41 djm 770: (!S_ISREG(a->perm))) {
771: error("Cannot download non-regular file: %s", remote_path);
1.14 djm 772: return(-1);
773: }
774:
1.21 djm 775: if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
776: size = a->size;
777: else
778: size = 0;
779:
1.23 djm 780: buflen = conn->transfer_buflen;
1.1 djm 781: buffer_init(&msg);
782:
783: /* Send open request */
1.23 djm 784: id = conn->msg_id++;
1.1 djm 785: buffer_put_char(&msg, SSH2_FXP_OPEN);
786: buffer_put_int(&msg, id);
787: buffer_put_cstring(&msg, remote_path);
788: buffer_put_int(&msg, SSH2_FXF_READ);
789: attrib_clear(&junk); /* Send empty attributes */
790: encode_attrib(&msg, &junk);
1.23 djm 791: send_msg(conn->fd_out, &msg);
1.33 deraadt 792: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 793:
1.23 djm 794: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 795: if (handle == NULL) {
796: buffer_free(&msg);
797: return(-1);
798: }
799:
1.45 djm 800: local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC,
1.38 djm 801: mode | S_IWRITE);
1.23 djm 802: if (local_fd == -1) {
803: error("Couldn't open local file \"%s\" for writing: %s",
804: local_path, strerror(errno));
1.24 markus 805: buffer_free(&msg);
806: xfree(handle);
1.23 djm 807: return(-1);
808: }
809:
1.1 djm 810: /* Read from remote and write to local */
1.21 djm 811: write_error = read_error = write_errno = num_req = offset = 0;
812: max_req = 1;
1.39 fgsch 813: progress_counter = 0;
814:
1.47 djm 815: if (showprogress && size != 0)
816: start_progress_meter(remote_path, size, &progress_counter);
1.39 fgsch 817:
1.21 djm 818: while (num_req > 0 || max_req > 0) {
819: char *data;
1.1 djm 820: u_int len;
821:
1.49 djm 822: /*
1.51 deraadt 823: * Simulate EOF on interrupt: stop sending new requests and
1.49 djm 824: * allow outstanding requests to drain gracefully
825: */
826: if (interrupted) {
827: if (num_req == 0) /* If we haven't started yet... */
828: break;
829: max_req = 0;
830: }
831:
1.21 djm 832: /* Send some more requests */
833: while (num_req < max_req) {
1.28 markus 834: debug3("Request range %llu -> %llu (%d/%d)",
1.25 itojun 835: (unsigned long long)offset,
836: (unsigned long long)offset + buflen - 1,
837: num_req, max_req);
1.21 djm 838: req = xmalloc(sizeof(*req));
1.23 djm 839: req->id = conn->msg_id++;
1.21 djm 840: req->len = buflen;
841: req->offset = offset;
842: offset += buflen;
843: num_req++;
844: TAILQ_INSERT_TAIL(&requests, req, tq);
1.28 markus 845: send_read_request(conn->fd_out, req->id, req->offset,
1.21 djm 846: req->len, handle, handle_len);
847: }
1.1 djm 848:
849: buffer_clear(&msg);
1.23 djm 850: get_msg(conn->fd_in, &msg);
1.1 djm 851: type = buffer_get_char(&msg);
852: id = buffer_get_int(&msg);
1.33 deraadt 853: debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
1.21 djm 854:
855: /* Find the request in our queue */
1.53 deraadt 856: for (req = TAILQ_FIRST(&requests);
1.21 djm 857: req != NULL && req->id != id;
858: req = TAILQ_NEXT(req, tq))
859: ;
860: if (req == NULL)
861: fatal("Unexpected reply %u", id);
862:
863: switch (type) {
864: case SSH2_FXP_STATUS:
1.5 djm 865: status = buffer_get_int(&msg);
1.21 djm 866: if (status != SSH2_FX_EOF)
867: read_error = 1;
868: max_req = 0;
869: TAILQ_REMOVE(&requests, req, tq);
870: xfree(req);
871: num_req--;
872: break;
873: case SSH2_FXP_DATA:
874: data = buffer_get_string(&msg, &len);
1.26 itojun 875: debug3("Received data %llu -> %llu",
1.28 markus 876: (unsigned long long)req->offset,
1.26 itojun 877: (unsigned long long)req->offset + len - 1);
1.21 djm 878: if (len > req->len)
879: fatal("Received more data than asked for "
1.37 deraadt 880: "%u > %u", len, req->len);
1.21 djm 881: if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
1.44 deraadt 882: atomicio(vwrite, local_fd, data, len) != len) &&
1.21 djm 883: !write_error) {
884: write_errno = errno;
885: write_error = 1;
886: max_req = 0;
887: }
1.39 fgsch 888: progress_counter += len;
1.21 djm 889: xfree(data);
1.1 djm 890:
1.21 djm 891: if (len == req->len) {
892: TAILQ_REMOVE(&requests, req, tq);
893: xfree(req);
894: num_req--;
895: } else {
896: /* Resend the request for the missing data */
897: debug3("Short data block, re-requesting "
1.26 itojun 898: "%llu -> %llu (%2d)",
1.28 markus 899: (unsigned long long)req->offset + len,
1.27 itojun 900: (unsigned long long)req->offset +
901: req->len - 1, num_req);
1.23 djm 902: req->id = conn->msg_id++;
1.21 djm 903: req->len -= len;
904: req->offset += len;
1.28 markus 905: send_read_request(conn->fd_out, req->id,
1.23 djm 906: req->offset, req->len, handle, handle_len);
1.21 djm 907: /* Reduce the request size */
908: if (len < buflen)
909: buflen = MAX(MIN_READ_SIZE, len);
910: }
911: if (max_req > 0) { /* max_req = 0 iff EOF received */
912: if (size > 0 && offset > size) {
913: /* Only one request at a time
914: * after the expected EOF */
915: debug3("Finish at %llu (%2d)",
1.26 itojun 916: (unsigned long long)offset,
917: num_req);
1.21 djm 918: max_req = 1;
1.49 djm 919: } else if (max_req <= conn->num_requests) {
1.21 djm 920: ++max_req;
921: }
1.1 djm 922: }
1.21 djm 923: break;
924: default:
1.33 deraadt 925: fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
1.1 djm 926: SSH2_FXP_DATA, type);
927: }
1.21 djm 928: }
1.1 djm 929:
1.39 fgsch 930: if (showprogress && size)
931: stop_progress_meter();
932:
1.21 djm 933: /* Sanity check */
934: if (TAILQ_FIRST(&requests) != NULL)
935: fatal("Transfer complete, but requests still in queue");
936:
937: if (read_error) {
1.28 markus 938: error("Couldn't read from remote file \"%s\" : %s",
1.21 djm 939: remote_path, fx2txt(status));
1.23 djm 940: do_close(conn, handle, handle_len);
1.21 djm 941: } else if (write_error) {
942: error("Couldn't write to \"%s\": %s", local_path,
943: strerror(write_errno));
944: status = -1;
1.23 djm 945: do_close(conn, handle, handle_len);
1.21 djm 946: } else {
1.23 djm 947: status = do_close(conn, handle, handle_len);
1.21 djm 948:
949: /* Override umask and utimes if asked */
950: if (pflag && fchmod(local_fd, mode) == -1)
951: error("Couldn't set mode on \"%s\": %s", local_path,
1.37 deraadt 952: strerror(errno));
1.21 djm 953: if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
954: struct timeval tv[2];
955: tv[0].tv_sec = a->atime;
956: tv[1].tv_sec = a->mtime;
957: tv[0].tv_usec = tv[1].tv_usec = 0;
958: if (utimes(local_path, tv) == -1)
959: error("Can't set times on \"%s\": %s",
1.37 deraadt 960: local_path, strerror(errno));
1.1 djm 961: }
1.10 djm 962: }
1.5 djm 963: close(local_fd);
964: buffer_free(&msg);
1.1 djm 965: xfree(handle);
1.23 djm 966:
967: return(status);
1.1 djm 968: }
969:
970: int
1.23 djm 971: do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
972: int pflag)
1.1 djm 973: {
1.20 djm 974: int local_fd, status;
1.22 djm 975: u_int handle_len, id, type;
1.1 djm 976: u_int64_t offset;
1.20 djm 977: char *handle, *data;
1.1 djm 978: Buffer msg;
979: struct stat sb;
980: Attrib a;
1.21 djm 981: u_int32_t startid;
982: u_int32_t ackid;
1.22 djm 983: struct outstanding_ack {
984: u_int id;
985: u_int len;
986: u_int64_t offset;
1.28 markus 987: TAILQ_ENTRY(outstanding_ack) tq;
1.22 djm 988: };
989: TAILQ_HEAD(ackhead, outstanding_ack) acks;
1.50 pedro 990: struct outstanding_ack *ack = NULL;
1.22 djm 991:
992: TAILQ_INIT(&acks);
1.1 djm 993:
994: if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
995: error("Couldn't open local file \"%s\" for reading: %s",
996: local_path, strerror(errno));
997: return(-1);
998: }
999: if (fstat(local_fd, &sb) == -1) {
1000: error("Couldn't fstat local file \"%s\": %s",
1001: local_path, strerror(errno));
1.41 djm 1002: close(local_fd);
1003: return(-1);
1004: }
1005: if (!S_ISREG(sb.st_mode)) {
1006: error("%s is not a regular file", local_path);
1.1 djm 1007: close(local_fd);
1008: return(-1);
1009: }
1010: stat_to_attrib(&sb, &a);
1011:
1012: a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
1013: a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
1014: a.perm &= 0777;
1015: if (!pflag)
1016: a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
1017:
1018: buffer_init(&msg);
1019:
1020: /* Send open request */
1.23 djm 1021: id = conn->msg_id++;
1.1 djm 1022: buffer_put_char(&msg, SSH2_FXP_OPEN);
1023: buffer_put_int(&msg, id);
1024: buffer_put_cstring(&msg, remote_path);
1025: buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
1026: encode_attrib(&msg, &a);
1.23 djm 1027: send_msg(conn->fd_out, &msg);
1.33 deraadt 1028: debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
1.1 djm 1029:
1030: buffer_clear(&msg);
1031:
1.23 djm 1032: handle = get_handle(conn->fd_in, id, &handle_len);
1.1 djm 1033: if (handle == NULL) {
1034: close(local_fd);
1035: buffer_free(&msg);
1036: return(-1);
1037: }
1038:
1.21 djm 1039: startid = ackid = id + 1;
1.23 djm 1040: data = xmalloc(conn->transfer_buflen);
1.20 djm 1041:
1.1 djm 1042: /* Read from local and write to remote */
1043: offset = 0;
1.39 fgsch 1044: if (showprogress)
1045: start_progress_meter(local_path, sb.st_size, &offset);
1046:
1.19 deraadt 1047: for (;;) {
1.1 djm 1048: int len;
1049:
1050: /*
1.51 deraadt 1051: * Can't use atomicio here because it returns 0 on EOF,
1.49 djm 1052: * thus losing the last block of the file.
1.51 deraadt 1053: * Simulate an EOF on interrupt, allowing ACKs from the
1.49 djm 1054: * server to drain.
1.1 djm 1055: */
1.49 djm 1056: if (interrupted)
1057: len = 0;
1058: else do
1.23 djm 1059: len = read(local_fd, data, conn->transfer_buflen);
1.1 djm 1060: while ((len == -1) && (errno == EINTR || errno == EAGAIN));
1061:
1062: if (len == -1)
1063: fatal("Couldn't read from \"%s\": %s", local_path,
1064: strerror(errno));
1.21 djm 1065:
1066: if (len != 0) {
1.22 djm 1067: ack = xmalloc(sizeof(*ack));
1068: ack->id = ++id;
1069: ack->offset = offset;
1070: ack->len = len;
1071: TAILQ_INSERT_TAIL(&acks, ack, tq);
1072:
1.21 djm 1073: buffer_clear(&msg);
1074: buffer_put_char(&msg, SSH2_FXP_WRITE);
1.22 djm 1075: buffer_put_int(&msg, ack->id);
1.21 djm 1076: buffer_put_string(&msg, handle, handle_len);
1077: buffer_put_int64(&msg, offset);
1078: buffer_put_string(&msg, data, len);
1.23 djm 1079: send_msg(conn->fd_out, &msg);
1.33 deraadt 1080: debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
1.37 deraadt 1081: id, (unsigned long long)offset, len);
1.22 djm 1082: } else if (TAILQ_FIRST(&acks) == NULL)
1.1 djm 1083: break;
1084:
1.22 djm 1085: if (ack == NULL)
1086: fatal("Unexpected ACK %u", id);
1087:
1.28 markus 1088: if (id == startid || len == 0 ||
1.23 djm 1089: id - ackid >= conn->num_requests) {
1.32 markus 1090: u_int r_id;
1.31 djm 1091:
1.22 djm 1092: buffer_clear(&msg);
1.23 djm 1093: get_msg(conn->fd_in, &msg);
1.22 djm 1094: type = buffer_get_char(&msg);
1.31 djm 1095: r_id = buffer_get_int(&msg);
1.22 djm 1096:
1097: if (type != SSH2_FXP_STATUS)
1098: fatal("Expected SSH2_FXP_STATUS(%d) packet, "
1099: "got %d", SSH2_FXP_STATUS, type);
1100:
1101: status = buffer_get_int(&msg);
1102: debug3("SSH2_FXP_STATUS %d", status);
1103:
1104: /* Find the request in our queue */
1.53 deraadt 1105: for (ack = TAILQ_FIRST(&acks);
1.31 djm 1106: ack != NULL && ack->id != r_id;
1.22 djm 1107: ack = TAILQ_NEXT(ack, tq))
1108: ;
1109: if (ack == NULL)
1.33 deraadt 1110: fatal("Can't find request for ID %u", r_id);
1.22 djm 1111: TAILQ_REMOVE(&acks, ack, tq);
1112:
1.21 djm 1113: if (status != SSH2_FX_OK) {
1114: error("Couldn't write to remote file \"%s\": %s",
1.37 deraadt 1115: remote_path, fx2txt(status));
1.23 djm 1116: do_close(conn, handle, handle_len);
1.21 djm 1117: close(local_fd);
1.42 markus 1118: xfree(data);
1119: xfree(ack);
1.21 djm 1120: goto done;
1121: }
1.33 deraadt 1122: debug3("In write loop, ack for %u %u bytes at %llu",
1.56 djm 1123: ack->id, ack->len, (unsigned long long)ack->offset);
1.21 djm 1124: ++ackid;
1.34 deraadt 1125: xfree(ack);
1.1 djm 1126: }
1127: offset += len;
1128: }
1.39 fgsch 1129: if (showprogress)
1130: stop_progress_meter();
1.20 djm 1131: xfree(data);
1.1 djm 1132:
1133: if (close(local_fd) == -1) {
1134: error("Couldn't close local file \"%s\": %s", local_path,
1135: strerror(errno));
1.23 djm 1136: do_close(conn, handle, handle_len);
1.5 djm 1137: status = -1;
1138: goto done;
1.1 djm 1139: }
1140:
1.10 djm 1141: /* Override umask and utimes if asked */
1142: if (pflag)
1.23 djm 1143: do_fsetstat(conn, handle, handle_len, &a);
1.10 djm 1144:
1.23 djm 1145: status = do_close(conn, handle, handle_len);
1.5 djm 1146:
1147: done:
1148: xfree(handle);
1149: buffer_free(&msg);
1.23 djm 1150: return(status);
1.1 djm 1151: }
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