Annotation of src/usr.bin/ssh/sftp-server.c, Revision 1.15
1.1 markus 1: /*
2: * Copyright (c) 2000 Markus Friedl. All rights reserved.
3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24: #include "includes.h"
1.15 ! djm 25: RCSID("$OpenBSD: sftp-server.c,v 1.14 2001/01/21 19:05:56 markus Exp $");
1.1 markus 26:
27: #include "buffer.h"
28: #include "bufaux.h"
29: #include "getput.h"
1.14 markus 30: #include "log.h"
1.1 markus 31: #include "xmalloc.h"
32:
1.10 markus 33: #include "sftp.h"
1.15 ! djm 34: #include "sftp-common.h"
1.1 markus 35:
36: /* helper */
1.10 markus 37: #define get_int64() buffer_get_int64(&iqueue);
1.1 markus 38: #define get_int() buffer_get_int(&iqueue);
39: #define get_string(lenp) buffer_get_string(&iqueue, lenp);
1.10 markus 40: #define TRACE debug
1.1 markus 41:
42: /* input and output queue */
43: Buffer iqueue;
44: Buffer oqueue;
45:
46: /* portable attibutes, etc. */
47:
48: typedef struct Stat Stat;
49:
1.15 ! djm 50: struct Stat {
1.1 markus 51: char *name;
52: char *long_name;
53: Attrib attrib;
54: };
55:
56: int
1.2 markus 57: errno_to_portable(int unixerrno)
1.1 markus 58: {
59: int ret = 0;
1.2 markus 60: switch (unixerrno) {
1.1 markus 61: case 0:
1.10 markus 62: ret = SSH2_FX_OK;
1.1 markus 63: break;
64: case ENOENT:
65: case ENOTDIR:
66: case EBADF:
67: case ELOOP:
1.10 markus 68: ret = SSH2_FX_NO_SUCH_FILE;
1.1 markus 69: break;
70: case EPERM:
71: case EACCES:
72: case EFAULT:
1.10 markus 73: ret = SSH2_FX_PERMISSION_DENIED;
1.1 markus 74: break;
75: case ENAMETOOLONG:
76: case EINVAL:
1.10 markus 77: ret = SSH2_FX_BAD_MESSAGE;
1.1 markus 78: break;
79: default:
1.10 markus 80: ret = SSH2_FX_FAILURE;
1.1 markus 81: break;
82: }
83: return ret;
84: }
85:
86: int
87: flags_from_portable(int pflags)
88: {
89: int flags = 0;
1.10 markus 90: if (pflags & SSH2_FXF_READ &&
91: pflags & SSH2_FXF_WRITE) {
1.1 markus 92: flags = O_RDWR;
1.10 markus 93: } else if (pflags & SSH2_FXF_READ) {
1.1 markus 94: flags = O_RDONLY;
1.10 markus 95: } else if (pflags & SSH2_FXF_WRITE) {
1.1 markus 96: flags = O_WRONLY;
97: }
1.10 markus 98: if (pflags & SSH2_FXF_CREAT)
1.1 markus 99: flags |= O_CREAT;
1.10 markus 100: if (pflags & SSH2_FXF_TRUNC)
1.1 markus 101: flags |= O_TRUNC;
1.10 markus 102: if (pflags & SSH2_FXF_EXCL)
1.1 markus 103: flags |= O_EXCL;
104: return flags;
105: }
106:
107: Attrib *
108: get_attrib(void)
109: {
110: return decode_attrib(&iqueue);
111: }
112:
113: /* handle handles */
114:
115: typedef struct Handle Handle;
116: struct Handle {
117: int use;
118: DIR *dirp;
119: int fd;
120: char *name;
121: };
122: enum {
123: HANDLE_UNUSED,
124: HANDLE_DIR,
125: HANDLE_FILE
126: };
127: Handle handles[100];
128:
129: void
130: handle_init(void)
131: {
132: int i;
133: for(i = 0; i < sizeof(handles)/sizeof(Handle); i++)
134: handles[i].use = HANDLE_UNUSED;
135: }
136:
137: int
138: handle_new(int use, char *name, int fd, DIR *dirp)
139: {
140: int i;
141: for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) {
142: if (handles[i].use == HANDLE_UNUSED) {
143: handles[i].use = use;
144: handles[i].dirp = dirp;
145: handles[i].fd = fd;
146: handles[i].name = name;
147: return i;
148: }
149: }
150: return -1;
151: }
152:
153: int
154: handle_is_ok(int i, int type)
155: {
1.10 markus 156: return i >= 0 && i < sizeof(handles)/sizeof(Handle) &&
157: handles[i].use == type;
1.1 markus 158: }
159:
160: int
161: handle_to_string(int handle, char **stringp, int *hlenp)
162: {
163: if (stringp == NULL || hlenp == NULL)
164: return -1;
1.13 markus 165: *stringp = xmalloc(sizeof(int32_t));
166: PUT_32BIT(*stringp, handle);
167: *hlenp = sizeof(int32_t);
1.1 markus 168: return 0;
169: }
170:
171: int
1.5 markus 172: handle_from_string(char *handle, u_int hlen)
1.1 markus 173: {
1.13 markus 174: int val;
175: if (hlen != sizeof(int32_t))
1.1 markus 176: return -1;
1.13 markus 177: val = GET_32BIT(handle);
1.1 markus 178: if (handle_is_ok(val, HANDLE_FILE) ||
179: handle_is_ok(val, HANDLE_DIR))
180: return val;
181: return -1;
182: }
183:
184: char *
185: handle_to_name(int handle)
186: {
187: if (handle_is_ok(handle, HANDLE_DIR)||
188: handle_is_ok(handle, HANDLE_FILE))
189: return handles[handle].name;
190: return NULL;
191: }
192:
193: DIR *
194: handle_to_dir(int handle)
195: {
196: if (handle_is_ok(handle, HANDLE_DIR))
197: return handles[handle].dirp;
198: return NULL;
199: }
200:
201: int
202: handle_to_fd(int handle)
203: {
204: if (handle_is_ok(handle, HANDLE_FILE))
205: return handles[handle].fd;
206: return -1;
207: }
208:
209: int
210: handle_close(int handle)
211: {
212: int ret = -1;
213: if (handle_is_ok(handle, HANDLE_FILE)) {
214: ret = close(handles[handle].fd);
215: handles[handle].use = HANDLE_UNUSED;
216: } else if (handle_is_ok(handle, HANDLE_DIR)) {
217: ret = closedir(handles[handle].dirp);
218: handles[handle].use = HANDLE_UNUSED;
219: } else {
220: errno = ENOENT;
221: }
222: return ret;
223: }
224:
225: int
226: get_handle(void)
227: {
228: char *handle;
1.10 markus 229: int val = -1;
1.5 markus 230: u_int hlen;
1.1 markus 231: handle = get_string(&hlen);
1.10 markus 232: if (hlen < 256)
233: val = handle_from_string(handle, hlen);
1.1 markus 234: xfree(handle);
235: return val;
236: }
237:
238: /* send replies */
239:
240: void
241: send_msg(Buffer *m)
242: {
243: int mlen = buffer_len(m);
244: buffer_put_int(&oqueue, mlen);
245: buffer_append(&oqueue, buffer_ptr(m), mlen);
246: buffer_consume(m, mlen);
247: }
248:
249: void
250: send_status(u_int32_t id, u_int32_t error)
251: {
252: Buffer msg;
253: TRACE("sent status id %d error %d", id, error);
254: buffer_init(&msg);
1.10 markus 255: buffer_put_char(&msg, SSH2_FXP_STATUS);
1.1 markus 256: buffer_put_int(&msg, id);
257: buffer_put_int(&msg, error);
258: send_msg(&msg);
259: buffer_free(&msg);
260: }
261: void
262: send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
263: {
264: Buffer msg;
265: buffer_init(&msg);
266: buffer_put_char(&msg, type);
267: buffer_put_int(&msg, id);
268: buffer_put_string(&msg, data, dlen);
269: send_msg(&msg);
270: buffer_free(&msg);
271: }
272:
273: void
274: send_data(u_int32_t id, char *data, int dlen)
275: {
276: TRACE("sent data id %d len %d", id, dlen);
1.10 markus 277: send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
1.1 markus 278: }
279:
280: void
281: send_handle(u_int32_t id, int handle)
282: {
283: char *string;
284: int hlen;
285: handle_to_string(handle, &string, &hlen);
286: TRACE("sent handle id %d handle %d", id, handle);
1.10 markus 287: send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
1.1 markus 288: xfree(string);
289: }
290:
291: void
292: send_names(u_int32_t id, int count, Stat *stats)
293: {
294: Buffer msg;
295: int i;
296: buffer_init(&msg);
1.10 markus 297: buffer_put_char(&msg, SSH2_FXP_NAME);
1.1 markus 298: buffer_put_int(&msg, id);
299: buffer_put_int(&msg, count);
300: TRACE("sent names id %d count %d", id, count);
301: for (i = 0; i < count; i++) {
302: buffer_put_cstring(&msg, stats[i].name);
303: buffer_put_cstring(&msg, stats[i].long_name);
304: encode_attrib(&msg, &stats[i].attrib);
305: }
306: send_msg(&msg);
307: buffer_free(&msg);
308: }
309:
310: void
311: send_attrib(u_int32_t id, Attrib *a)
312: {
313: Buffer msg;
314: TRACE("sent attrib id %d have 0x%x", id, a->flags);
315: buffer_init(&msg);
1.10 markus 316: buffer_put_char(&msg, SSH2_FXP_ATTRS);
1.1 markus 317: buffer_put_int(&msg, id);
318: encode_attrib(&msg, a);
319: send_msg(&msg);
320: buffer_free(&msg);
321: }
322:
323: /* parse incoming */
324:
325: void
326: process_init(void)
327: {
328: Buffer msg;
329: int version = buffer_get_int(&iqueue);
330:
331: TRACE("client version %d", version);
332: buffer_init(&msg);
1.10 markus 333: buffer_put_char(&msg, SSH2_FXP_VERSION);
334: buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
1.1 markus 335: send_msg(&msg);
336: buffer_free(&msg);
337: }
338:
339: void
340: process_open(void)
341: {
342: u_int32_t id, pflags;
343: Attrib *a;
344: char *name;
1.10 markus 345: int handle, fd, flags, mode, status = SSH2_FX_FAILURE;
1.1 markus 346:
347: id = get_int();
348: name = get_string(NULL);
1.10 markus 349: pflags = get_int(); /* portable flags */
1.1 markus 350: a = get_attrib();
351: flags = flags_from_portable(pflags);
1.10 markus 352: mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666;
1.1 markus 353: TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode);
354: fd = open(name, flags, mode);
355: if (fd < 0) {
356: status = errno_to_portable(errno);
357: } else {
358: handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL);
359: if (handle < 0) {
360: close(fd);
361: } else {
362: send_handle(id, handle);
1.10 markus 363: status = SSH2_FX_OK;
1.1 markus 364: }
365: }
1.10 markus 366: if (status != SSH2_FX_OK)
1.1 markus 367: send_status(id, status);
368: xfree(name);
369: }
370:
371: void
372: process_close(void)
373: {
374: u_int32_t id;
1.10 markus 375: int handle, ret, status = SSH2_FX_FAILURE;
1.1 markus 376:
377: id = get_int();
378: handle = get_handle();
379: TRACE("close id %d handle %d", id, handle);
380: ret = handle_close(handle);
1.10 markus 381: status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
1.1 markus 382: send_status(id, status);
383: }
384:
385: void
386: process_read(void)
387: {
388: char buf[64*1024];
1.10 markus 389: u_int32_t id, len;
390: int handle, fd, ret, status = SSH2_FX_FAILURE;
1.1 markus 391: u_int64_t off;
392:
393: id = get_int();
394: handle = get_handle();
1.10 markus 395: off = get_int64();
1.1 markus 396: len = get_int();
397:
398: TRACE("read id %d handle %d off %qd len %d", id, handle, off, len);
399: if (len > sizeof buf) {
400: len = sizeof buf;
401: log("read change len %d", len);
402: }
403: fd = handle_to_fd(handle);
404: if (fd >= 0) {
405: if (lseek(fd, off, SEEK_SET) < 0) {
406: error("process_read: seek failed");
407: status = errno_to_portable(errno);
408: } else {
409: ret = read(fd, buf, len);
410: if (ret < 0) {
411: status = errno_to_portable(errno);
412: } else if (ret == 0) {
1.10 markus 413: status = SSH2_FX_EOF;
1.1 markus 414: } else {
415: send_data(id, buf, ret);
1.10 markus 416: status = SSH2_FX_OK;
1.1 markus 417: }
418: }
419: }
1.10 markus 420: if (status != SSH2_FX_OK)
1.1 markus 421: send_status(id, status);
422: }
423:
424: void
425: process_write(void)
426: {
1.10 markus 427: u_int32_t id;
1.1 markus 428: u_int64_t off;
1.5 markus 429: u_int len;
1.10 markus 430: int handle, fd, ret, status = SSH2_FX_FAILURE;
1.1 markus 431: char *data;
432:
433: id = get_int();
434: handle = get_handle();
1.10 markus 435: off = get_int64();
1.1 markus 436: data = get_string(&len);
437:
438: TRACE("write id %d handle %d off %qd len %d", id, handle, off, len);
439: fd = handle_to_fd(handle);
440: if (fd >= 0) {
441: if (lseek(fd, off, SEEK_SET) < 0) {
442: status = errno_to_portable(errno);
443: error("process_write: seek failed");
444: } else {
445: /* XXX ATOMICIO ? */
446: ret = write(fd, data, len);
447: if (ret == -1) {
448: error("process_write: write failed");
449: status = errno_to_portable(errno);
450: } else if (ret == len) {
1.10 markus 451: status = SSH2_FX_OK;
1.1 markus 452: } else {
453: log("nothing at all written");
454: }
455: }
456: }
457: send_status(id, status);
458: xfree(data);
459: }
460:
461: void
462: process_do_stat(int do_lstat)
463: {
1.13 markus 464: Attrib a;
1.1 markus 465: struct stat st;
466: u_int32_t id;
467: char *name;
1.10 markus 468: int ret, status = SSH2_FX_FAILURE;
1.1 markus 469:
470: id = get_int();
471: name = get_string(NULL);
472: TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name);
473: ret = do_lstat ? lstat(name, &st) : stat(name, &st);
474: if (ret < 0) {
475: status = errno_to_portable(errno);
476: } else {
1.13 markus 477: stat_to_attrib(&st, &a);
478: send_attrib(id, &a);
1.10 markus 479: status = SSH2_FX_OK;
1.1 markus 480: }
1.10 markus 481: if (status != SSH2_FX_OK)
1.1 markus 482: send_status(id, status);
483: xfree(name);
484: }
485:
486: void
487: process_stat(void)
488: {
489: process_do_stat(0);
490: }
491:
492: void
493: process_lstat(void)
494: {
495: process_do_stat(1);
496: }
497:
498: void
499: process_fstat(void)
500: {
1.13 markus 501: Attrib a;
1.1 markus 502: struct stat st;
503: u_int32_t id;
1.10 markus 504: int fd, ret, handle, status = SSH2_FX_FAILURE;
1.1 markus 505:
506: id = get_int();
507: handle = get_handle();
508: TRACE("fstat id %d handle %d", id, handle);
509: fd = handle_to_fd(handle);
510: if (fd >= 0) {
511: ret = fstat(fd, &st);
512: if (ret < 0) {
513: status = errno_to_portable(errno);
514: } else {
1.13 markus 515: stat_to_attrib(&st, &a);
516: send_attrib(id, &a);
1.10 markus 517: status = SSH2_FX_OK;
1.1 markus 518: }
519: }
1.10 markus 520: if (status != SSH2_FX_OK)
1.1 markus 521: send_status(id, status);
522: }
523:
524: struct timeval *
525: attrib_to_tv(Attrib *a)
526: {
527: static struct timeval tv[2];
528: tv[0].tv_sec = a->atime;
529: tv[0].tv_usec = 0;
530: tv[1].tv_sec = a->mtime;
531: tv[1].tv_usec = 0;
532: return tv;
533: }
534:
535: void
536: process_setstat(void)
537: {
538: Attrib *a;
539: u_int32_t id;
540: char *name;
541: int ret;
1.10 markus 542: int status = SSH2_FX_OK;
1.1 markus 543:
544: id = get_int();
545: name = get_string(NULL);
546: a = get_attrib();
547: TRACE("setstat id %d name %s", id, name);
1.10 markus 548: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
1.1 markus 549: ret = chmod(name, a->perm & 0777);
550: if (ret == -1)
551: status = errno_to_portable(errno);
552: }
1.10 markus 553: if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
1.1 markus 554: ret = utimes(name, attrib_to_tv(a));
555: if (ret == -1)
556: status = errno_to_portable(errno);
557: }
558: send_status(id, status);
559: xfree(name);
560: }
561:
562: void
563: process_fsetstat(void)
564: {
565: Attrib *a;
566: u_int32_t id;
567: int handle, fd, ret;
1.10 markus 568: int status = SSH2_FX_OK;
1.1 markus 569:
570: id = get_int();
571: handle = get_handle();
572: a = get_attrib();
573: TRACE("fsetstat id %d handle %d", id, handle);
574: fd = handle_to_fd(handle);
575: if (fd < 0) {
1.10 markus 576: status = SSH2_FX_FAILURE;
1.1 markus 577: } else {
1.10 markus 578: if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
1.1 markus 579: ret = fchmod(fd, a->perm & 0777);
580: if (ret == -1)
581: status = errno_to_portable(errno);
582: }
1.10 markus 583: if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
1.1 markus 584: ret = futimes(fd, attrib_to_tv(a));
585: if (ret == -1)
586: status = errno_to_portable(errno);
587: }
588: }
589: send_status(id, status);
590: }
591:
592: void
593: process_opendir(void)
594: {
595: DIR *dirp = NULL;
596: char *path;
1.10 markus 597: int handle, status = SSH2_FX_FAILURE;
1.1 markus 598: u_int32_t id;
599:
600: id = get_int();
601: path = get_string(NULL);
602: TRACE("opendir id %d path %s", id, path);
603: dirp = opendir(path);
604: if (dirp == NULL) {
605: status = errno_to_portable(errno);
606: } else {
607: handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp);
608: if (handle < 0) {
609: closedir(dirp);
610: } else {
611: send_handle(id, handle);
1.10 markus 612: status = SSH2_FX_OK;
1.1 markus 613: }
614:
615: }
1.10 markus 616: if (status != SSH2_FX_OK)
1.1 markus 617: send_status(id, status);
618: xfree(path);
619: }
620:
1.10 markus 621: /*
1.12 markus 622: * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh
1.10 markus 623: */
1.1 markus 624: char *
625: ls_file(char *name, struct stat *st)
626: {
1.12 markus 627: int sz = 0;
628: struct passwd *pw;
629: struct group *gr;
630: struct tm *ltime = localtime(&st->st_mtime);
631: char *user, *group;
632: char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];
633:
634: strmode(st->st_mode, mode);
635: if ((pw = getpwuid(st->st_uid)) != NULL) {
636: user = pw->pw_name;
637: } else {
638: snprintf(ubuf, sizeof ubuf, "%d", st->st_uid);
639: user = ubuf;
640: }
641: if ((gr = getgrgid(st->st_gid)) != NULL) {
642: group = gr->gr_name;
643: } else {
644: snprintf(gbuf, sizeof gbuf, "%d", st->st_gid);
645: group = gbuf;
646: }
647: if (ltime != NULL) {
648: if (time(NULL) - st->st_mtime < (365*24*60*60)/2)
649: sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
650: else
651: sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
652: }
653: if (sz == 0)
654: tbuf[0] = '\0';
655: snprintf(buf, sizeof buf, "%s %3d %-8.8s %-8.8s %8qd %s %s", mode,
656: st->st_nlink, user, group, (long long)st->st_size, tbuf, name);
1.1 markus 657: return xstrdup(buf);
658: }
659:
660: void
661: process_readdir(void)
662: {
663: DIR *dirp;
664: struct dirent *dp;
665: char *path;
666: int handle;
667: u_int32_t id;
668:
669: id = get_int();
670: handle = get_handle();
671: TRACE("readdir id %d handle %d", id, handle);
672: dirp = handle_to_dir(handle);
673: path = handle_to_name(handle);
674: if (dirp == NULL || path == NULL) {
1.10 markus 675: send_status(id, SSH2_FX_FAILURE);
1.1 markus 676: } else {
677: struct stat st;
678: char pathname[1024];
679: Stat *stats;
680: int nstats = 10, count = 0, i;
681: stats = xmalloc(nstats * sizeof(Stat));
682: while ((dp = readdir(dirp)) != NULL) {
683: if (count >= nstats) {
684: nstats *= 2;
685: stats = xrealloc(stats, nstats * sizeof(Stat));
686: }
687: /* XXX OVERFLOW ? */
688: snprintf(pathname, sizeof pathname,
689: "%s/%s", path, dp->d_name);
690: if (lstat(pathname, &st) < 0)
691: continue;
1.13 markus 692: stat_to_attrib(&st, &(stats[count].attrib));
1.1 markus 693: stats[count].name = xstrdup(dp->d_name);
694: stats[count].long_name = ls_file(dp->d_name, &st);
695: count++;
696: /* send up to 100 entries in one message */
1.11 markus 697: /* XXX check packet size instead */
1.1 markus 698: if (count == 100)
699: break;
700: }
1.10 markus 701: if (count > 0) {
702: send_names(id, count, stats);
703: for(i = 0; i < count; i++) {
704: xfree(stats[i].name);
705: xfree(stats[i].long_name);
706: }
707: } else {
708: send_status(id, SSH2_FX_EOF);
1.1 markus 709: }
710: xfree(stats);
711: }
712: }
713:
714: void
715: process_remove(void)
716: {
717: char *name;
718: u_int32_t id;
1.10 markus 719: int status = SSH2_FX_FAILURE;
1.1 markus 720: int ret;
721:
722: id = get_int();
723: name = get_string(NULL);
724: TRACE("remove id %d name %s", id, name);
1.8 markus 725: ret = unlink(name);
1.10 markus 726: status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
1.1 markus 727: send_status(id, status);
728: xfree(name);
729: }
730:
731: void
732: process_mkdir(void)
733: {
734: Attrib *a;
735: u_int32_t id;
736: char *name;
1.10 markus 737: int ret, mode, status = SSH2_FX_FAILURE;
1.1 markus 738:
739: id = get_int();
740: name = get_string(NULL);
741: a = get_attrib();
1.10 markus 742: mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
743: a->perm & 0777 : 0777;
1.1 markus 744: TRACE("mkdir id %d name %s mode 0%o", id, name, mode);
745: ret = mkdir(name, mode);
1.10 markus 746: status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
1.1 markus 747: send_status(id, status);
748: xfree(name);
749: }
750:
751: void
752: process_rmdir(void)
753: {
754: u_int32_t id;
755: char *name;
756: int ret, status;
757:
758: id = get_int();
759: name = get_string(NULL);
760: TRACE("rmdir id %d name %s", id, name);
761: ret = rmdir(name);
1.10 markus 762: status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
1.1 markus 763: send_status(id, status);
764: xfree(name);
765: }
766:
767: void
768: process_realpath(void)
769: {
770: char resolvedname[MAXPATHLEN];
771: u_int32_t id;
772: char *path;
773:
774: id = get_int();
775: path = get_string(NULL);
1.7 markus 776: if (path[0] == '\0') {
777: xfree(path);
778: path = xstrdup(".");
779: }
1.1 markus 780: TRACE("realpath id %d path %s", id, path);
781: if (realpath(path, resolvedname) == NULL) {
782: send_status(id, errno_to_portable(errno));
783: } else {
784: Stat s;
785: attrib_clear(&s.attrib);
786: s.name = s.long_name = resolvedname;
787: send_names(id, 1, &s);
788: }
789: xfree(path);
790: }
791:
792: void
793: process_rename(void)
794: {
795: u_int32_t id;
1.11 markus 796: struct stat st;
1.1 markus 797: char *oldpath, *newpath;
1.11 markus 798: int ret, status = SSH2_FX_FAILURE;
1.1 markus 799:
800: id = get_int();
801: oldpath = get_string(NULL);
802: newpath = get_string(NULL);
803: TRACE("rename id %d old %s new %s", id, oldpath, newpath);
1.11 markus 804: /* fail if 'newpath' exists */
805: if (stat(newpath, &st) == -1) {
806: ret = rename(oldpath, newpath);
807: status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
808: }
1.1 markus 809: send_status(id, status);
810: xfree(oldpath);
811: xfree(newpath);
812: }
813:
1.10 markus 814: void
815: process_extended(void)
816: {
817: u_int32_t id;
818: char *request;
819:
820: id = get_int();
821: request = get_string(NULL);
822: send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
823: xfree(request);
824: }
1.1 markus 825:
826: /* stolen from ssh-agent */
827:
828: void
829: process(void)
830: {
1.9 markus 831: u_int msg_len;
832: u_int type;
833: u_char *cp;
1.1 markus 834:
835: if (buffer_len(&iqueue) < 5)
836: return; /* Incomplete message. */
1.9 markus 837: cp = (u_char *) buffer_ptr(&iqueue);
1.1 markus 838: msg_len = GET_32BIT(cp);
839: if (msg_len > 256 * 1024) {
840: error("bad message ");
841: exit(11);
842: }
843: if (buffer_len(&iqueue) < msg_len + 4)
844: return;
845: buffer_consume(&iqueue, 4);
846: type = buffer_get_char(&iqueue);
847: switch (type) {
1.10 markus 848: case SSH2_FXP_INIT:
1.1 markus 849: process_init();
850: break;
1.10 markus 851: case SSH2_FXP_OPEN:
1.1 markus 852: process_open();
853: break;
1.10 markus 854: case SSH2_FXP_CLOSE:
1.1 markus 855: process_close();
856: break;
1.10 markus 857: case SSH2_FXP_READ:
1.1 markus 858: process_read();
859: break;
1.10 markus 860: case SSH2_FXP_WRITE:
1.1 markus 861: process_write();
862: break;
1.10 markus 863: case SSH2_FXP_LSTAT:
1.1 markus 864: process_lstat();
865: break;
1.10 markus 866: case SSH2_FXP_FSTAT:
1.1 markus 867: process_fstat();
868: break;
1.10 markus 869: case SSH2_FXP_SETSTAT:
1.1 markus 870: process_setstat();
871: break;
1.10 markus 872: case SSH2_FXP_FSETSTAT:
1.1 markus 873: process_fsetstat();
874: break;
1.10 markus 875: case SSH2_FXP_OPENDIR:
1.1 markus 876: process_opendir();
877: break;
1.10 markus 878: case SSH2_FXP_READDIR:
1.1 markus 879: process_readdir();
880: break;
1.10 markus 881: case SSH2_FXP_REMOVE:
1.1 markus 882: process_remove();
883: break;
1.10 markus 884: case SSH2_FXP_MKDIR:
1.1 markus 885: process_mkdir();
886: break;
1.10 markus 887: case SSH2_FXP_RMDIR:
1.1 markus 888: process_rmdir();
889: break;
1.10 markus 890: case SSH2_FXP_REALPATH:
1.1 markus 891: process_realpath();
892: break;
1.10 markus 893: case SSH2_FXP_STAT:
1.1 markus 894: process_stat();
895: break;
1.10 markus 896: case SSH2_FXP_RENAME:
1.1 markus 897: process_rename();
898: break;
1.10 markus 899: case SSH2_FXP_EXTENDED:
900: process_extended();
901: break;
1.1 markus 902: default:
903: error("Unknown message %d", type);
904: break;
905: }
906: }
907:
908: int
909: main(int ac, char **av)
910: {
911: fd_set rset, wset;
912: int in, out, max;
1.5 markus 913: ssize_t len, olen;
1.1 markus 914:
915: handle_init();
1.10 markus 916:
1.11 markus 917: #ifdef DEBUG_SFTP_SERVER
1.10 markus 918: log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0);
1.11 markus 919: #endif
1.1 markus 920:
921: in = dup(STDIN_FILENO);
922: out = dup(STDOUT_FILENO);
923:
924: max = 0;
925: if (in > max)
926: max = in;
927: if (out > max)
928: max = out;
929:
930: buffer_init(&iqueue);
931: buffer_init(&oqueue);
932:
933: for (;;) {
934: FD_ZERO(&rset);
935: FD_ZERO(&wset);
936:
937: FD_SET(in, &rset);
938: olen = buffer_len(&oqueue);
939: if (olen > 0)
940: FD_SET(out, &wset);
941:
942: if (select(max+1, &rset, &wset, NULL, NULL) < 0) {
943: if (errno == EINTR)
944: continue;
945: exit(2);
946: }
947:
948: /* copy stdin to iqueue */
949: if (FD_ISSET(in, &rset)) {
950: char buf[4*4096];
951: len = read(in, buf, sizeof buf);
952: if (len == 0) {
953: debug("read eof");
954: exit(0);
955: } else if (len < 0) {
956: error("read error");
957: exit(1);
958: } else {
959: buffer_append(&iqueue, buf, len);
960: }
961: }
962: /* send oqueue to stdout */
963: if (FD_ISSET(out, &wset)) {
964: len = write(out, buffer_ptr(&oqueue), olen);
965: if (len < 0) {
966: error("write error");
967: exit(1);
968: } else {
969: buffer_consume(&oqueue, len);
970: }
971: }
972: /* process requests from client */
973: process();
974: }
975: }
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